CA1141835A - Screw-coupled electrical connectors - Google Patents
Screw-coupled electrical connectorsInfo
- Publication number
- CA1141835A CA1141835A CA000345035A CA345035A CA1141835A CA 1141835 A CA1141835 A CA 1141835A CA 000345035 A CA000345035 A CA 000345035A CA 345035 A CA345035 A CA 345035A CA 1141835 A CA1141835 A CA 1141835A
- Authority
- CA
- Canada
- Prior art keywords
- thrust
- connector part
- annular element
- connector
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000008878 coupling Effects 0.000 claims abstract description 83
- 238000010168 coupling process Methods 0.000 claims abstract description 83
- 238000005859 coupling reaction Methods 0.000 claims abstract description 83
- 238000007373 indentation Methods 0.000 claims description 25
- 230000000295 complement effect Effects 0.000 claims description 16
- 230000013011 mating Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract 1
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ODPOAESBSUKMHD-UHFFFAOYSA-L 6,7-dihydrodipyrido[1,2-b:1',2'-e]pyrazine-5,8-diium;dibromide Chemical compound [Br-].[Br-].C1=CC=[N+]2CC[N+]3=CC=CC=C3C2=C1 ODPOAESBSUKMHD-UHFFFAOYSA-L 0.000 description 1
- 239000005630 Diquat Substances 0.000 description 1
- 244000228957 Ferula foetida Species 0.000 description 1
- 241000022563 Rema Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/622—Screw-ring or screw-casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
Abstract
ABSTRACT
The invention relates to screw-coupled electrical connectors. It is known to provide screw-coupled electrical connectors with means for providing an indi-cation of the fact that the two parts are approaching or have reached the fully mated condition and for resisting subsequent notation of the coupling sleeve in the uncoupling direction. However, this has been accom-plished only with complex and expensive mechanisms such as movable balls mounted in a flange on the first con-nector part and a series of holes in a flange on the coupling sleeve. According to the invention, there is provided an improved first part of a two-part, screw-coupled electrical connector, the first part having first and second annular elements arranged coaxially with the first part and immediately axially adjacent to one another, there being defined in the first annular element a set of circumferentially spaced thrust-member-receiving regions to be engaged by thrust-members-sup-ported in a set of thrust-member-supporting regions in the second annular element, one of the annular elements being arranged to rotate relative to the first part together with the coupling sleeve and the annular element being constrained against rotation relative to the first part, means being provided resiliently to urge the thrust-members and the first annular element towards one another and to cause sequential engagement of thrust-member-receiving regions by the thrust-members when the two connector-parts approach the fully-mated condition.
The invention relates to screw-coupled electrical connectors. It is known to provide screw-coupled electrical connectors with means for providing an indi-cation of the fact that the two parts are approaching or have reached the fully mated condition and for resisting subsequent notation of the coupling sleeve in the uncoupling direction. However, this has been accom-plished only with complex and expensive mechanisms such as movable balls mounted in a flange on the first con-nector part and a series of holes in a flange on the coupling sleeve. According to the invention, there is provided an improved first part of a two-part, screw-coupled electrical connector, the first part having first and second annular elements arranged coaxially with the first part and immediately axially adjacent to one another, there being defined in the first annular element a set of circumferentially spaced thrust-member-receiving regions to be engaged by thrust-members-sup-ported in a set of thrust-member-supporting regions in the second annular element, one of the annular elements being arranged to rotate relative to the first part together with the coupling sleeve and the annular element being constrained against rotation relative to the first part, means being provided resiliently to urge the thrust-members and the first annular element towards one another and to cause sequential engagement of thrust-member-receiving regions by the thrust-members when the two connector-parts approach the fully-mated condition.
Description
li41~5 INPROVEMENTS IN OR RELATING TO SCREW-COUPLED ELECTRICAL CONNECTORS
TECHNICAL FIELD
The invention relates to screw-coupled electrical connectors.
BACKGROUND OF THE PRIOR ART
In a screw-coupled electrical connector, an inter-nally screw-threaded coupling sleeve is mounted on a first of the parts to enable the second connector-part, which is provided with an external screw-thread, to be drawn towards the first part. Hereinafter the expressions "coupling di-rection of rotation of the coupling sleeve" and "uncoupling direction of rotation of the coupling sleeve" means respec-tively the directions in which the coupling sleeve is ro-tated to draw the connector parts together and to enable separation of the two connector parts. It is known to pro-vide screw-coupled electrical connectors with means for providing an indication of the fact that two parts are approaching or have reached the fully mated condition and for resisting subsequent rotation of the coupling sleeve in the uncoupling direction. To this end it has been pro-posed to provide a series of circumferentially spaced smal-ler movable balls mounted in a flange on the first con-nector pa~-t and a series of holes in a flange on the coup-ling sleeve. As the coupling sleeve is rotated in the coupling direction the balls sequentially engage the holes and in doing so provide audible clicks. When the connector-parts are fully-mated, the engagement between the balls and the holes provides resistence to rotation of the coup-ling sleeve in the uncoupling direction which could result, for example, from vibration. It has also been proposed to replace the balls and holes by protrusions and inden-tations which may be defined on washers instead of flanges.
BRIEF SUMMARY OF THE INVENTION
According to the invention, there is provided a first connector part for connecting with a mating connector part to form a two-part, rotatably-coupled electrical con-nector, wherein there is provided a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, comple-`,~j.~, ~4~35 mentary connector part to be drawn towards the first con-nector part by complementary engaging means between the coupling sleeve and the complementary connector part, and wherein there are provided first and second annular ele-ments arranged coaxially with the first part and immedi-ately axially adjacent to one another, the first annular element having a set of circumferentially spaced thrust-member-receiving regions, the second annular element being provided with a plurality of thrust-members supported in a set of thrust-member-supporting regions provided in the second annular element, one of the annular elements being arranged to rotate relative to the first part together with the coupling sleeve and the other annular element being constrained against rotation relative to the first part, there being further provided resilient means for urging the thrust-members and the first annular element towards one another and to cause sequential engagement of the thrust-member-receiving regions by the thrust-members when the two connector parts approach the fully-mated conditions, wherein each of the regions in the setof thrust-member-supporting regions is asymmetrical about any plane containing the axis of the first connector part and extending radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of the coupling sleeve in the uncoupling di-rection than in the coupling direction.
In a preferred embodiment of the invention, the thrust-members are pins and the asymmetry is such that the pins are skewed relative to the axis of the first connec-tor-part. The skewing of the pins is such that the pins are inclined relative to their contact with the first an-nular element in the direction in which they move relative to the first annular element when the coupling sleeve is rotated in the coupling direction.
The thrust-member receiving regions can be, for example, in the form of part-spherical indentations, whereby the resistance to rotation of the coupling sleeve by virtue solely of the inclination of the pins is greater in the direction of uncoupling than in the directlon of coupling. Such dlfferentlal reslstance can be alded by applylng the said asymmetry to the indentatlons in addltlon to the thrust-member supporting regions, BRIEF DESCRIPTION OF THE DRAWINGS
The inventlon will be further described by way o~ example and wlth reference to the accompanying draw-ings, in which:
Flg. 1 is a side elevation, partly ln sectlon, of two parts of a screw-coupled electrlcal connector having a ~irst connector-part constructed according to the inventlon;
Fig. 2 ls a view of the first connector-part and coupling sleeve in the direction indicated by the arrow II in Fig. 1, part of the coupling sleeve being cut away; and Figs. 3 to ~ are each a sect10n through a thrust-member, and through parts of a washer and a flange on a first connector-part constructed according to the inven-tion.
DETAILED DESCR~PTION OF THE INVENTION
Referring to the drawings, Fig. 1 shows a screw-coupled electrical connector comprislng a first connec-tor-part 10 and a second connector-part 11. me first and ~econd connector-parts are generally cyllndrical and have inserts 12 and 13, respectively, of an elec-trlcally insulating material which support sockets 14 and complementary contact pins 1~ respectlvely. Only one socket and one contact pln are shown in Flg. 1. A
coupling sleeve 16 is mounted coaxially and rot~tably on the first part 10 and is provided with an ~nternal 3crew-thread 17 at its forward end, i.e., the end neare~t the second connector-part. The second connector-3~ part i~ provided w~th a complementary external screw-thread 18 to enable the second part to be drawn towards the fir~t part by rotation of the coupling sleeve 16 in the coupling direction.
A plurality of thrust-members in the form of ~35 plns 20 are slldably supported in a set of thrust-member-supporting regions, which are bores 21 ln a radially outwardly extending annular ~lange 19 on the flrst part 10. Immediately to the rear of the flange 19 ls a washer 22, in the front face of which there is defined a set of circumferentially spaced thrust-member-recelving reglons, whlch are part-spherlcal indentations 23 arranged to be engageable by the pins 20. The washer 22 has two keys 24 which extend radially outwardly to engage ~eyways 25 ln the coupling sleeve 16, whereby the washer 22, although axlally movable relative to the coupling sleeve 16 and first part 10, is constrained to rotate with the coupllng sleeve 16 relat~ve to the first part 10.
Only one pln 20, one bore 21, one indentation 23, one key 24 and one keyway 25 are shown in Flg. 1.
Referring now to Fig. 2, each of the thrust-member-supporting regions, i.e., the bores 21, is asymmetrlcal about any plane cont~hing the axis of the flrst part 10 and extending radially through the reglon.
The a~ymmetry is such that the pins 20 are skewed rela-tlve to the axis of the first part, the pin~ belng lnclined relative to their contact with the washer 22 in the dlrection in which they move relatlve to the washer 22 when the coupling sleeve 16 is rotated in the coupllng dlrection. The pins 20 are preferably lnclined through approximately 10 from parallellsm with the axis o~ the fir~t part 10. There are preferably more lndenta-tlon~ 23 than pins 20, for example, there are preferably 3 three pins and twelve lndentatlons. The plns and indentatlons ~hould be evenly spaced and the number of indentatlons should be an integral multlple of the number of pins, whereby when one pin is in engagement wlth an indentation the rema~nder of the pins are also ln engagement with indentations. For clarlty, the k#y 24 shown in Fig. 1 has been omitted rrom Fig. 2.
Referring again to Fig. 1, to the rear of the washer 22 i9 a spr~ng-washer 26, a washer 27 and a retaining washer 28 which ls located in an annular 1~4~WS
groove 29 in the internal surface of the coupling æleeve 16. The spring-washer 26 is in compression between the washer 22 and the wa~her 27, the rear face of whlch acts against the retaining washer 28, whereby the spring-washer serves to urge the wa,~,her 22 forwardly intoengagement wlth the annular flange 19 and to urge the coupling sleeve 16 rearwardly relative to the first pa,rt 10 such that an abutment ,urface 30 extending radia,lly inwardly from the coupling sleeve abuts against the front face of the annular flange 19 on the f'irst part. Thus the arrangement of spring washer 26, flange 19 and washers 22, 27 and 28 serves to retain the coupling 8 leeve 16 on the flrst part , The forward ends of the pins 20 enEage an axlal_ ly movable thrust-washer 31, the movement of which, relative to the coupling sleeve 16, i,~, limited in the forward direction by engagement with an abutment surface 32 extending radially inwardly from the coupling sleeVe.
-~ The length of the pin~ 20, the thickness of' the annular flange 19, and the dlstance between the two abutment 3urf"aces 30 and 32 are such that when the coupling sleeve 16 is in its rearwardmost po,~31tion relatlve to the first part 10 (i.e., when the abutment surface 30 is engaging the f'lange 19) and when the pins 20 are ln their for-wardmost positlons relatiVe to the first part 10 (i.e.~when the pins are engaging the thrust-washer 31 which is engaging the abutment surf'ace 32), the rear ends of the plns 20 do not pro,~ect f'rom the bore, 21 in the ftlange 19. This situation is shown in Figs. 1 and 2. In this 3 situation the coupling ~,leeve 16 together with the washer 22 can rotate f'reely wlth re~,pect to the f'irst connector;~art 10 without the indentations 23 being engaged by the pins 20.
The spring-washer 26, washer 27, retalnlng 3~ washer 28, thrust-washer 31 and insert 12 are also shown in Fig. 2.
To couple the two connector-parts, they are moved together in a relatlve orientation which allows a key 33 on the f'irst part to enEage a keyway 34 in the 3~41835 ~econd part (see Flg. 1). The key 33 and keyway 34 are provided to ensure that the two parts are coupled only ln the orlentation in which the contact pins 15 mate wlth the corresponding sockets 14. me screw-thread 17 in the coupling sleeve 16 is caused to engage the screw-thread 18 on the second connector-part and the coupling sleeve i8 rotated in the coupling direction to draw the two connector-parts together and mate the contact pins with the ~ockets.
When the connector-parts approach the fully-mated conditlon the leading edge 35 of the second part engages the forward face of the thrust-washer 31, and urges the thrust-washer and hence the pins 20 rearwardly relative to the first part. As the two connector-parts are drawn closer together by further rotationof the coupling sleeve 16 in the coupling directlon, the pins 20 are caused to pro~ect from the rear ends of the bores 21 in the flange 19, and to engage the indenta-tions 23 sequentially in the washer 22 as it rotates with the coupling sleeve. The sequential engagement of the indentations 23 by the pins 20 provideR an audlble indication that the two connector-parts have approached the fully-mated condition.
As a result of the skewed arrangement of the plns 20, the engagement between the pins and indentatlon 23 i~ such as to provide a greater resistance to rota-tion of the coupling sleeve 16 in the uncoupllng direc-tion than in the coupling direction. The extent o~ the resistance to rotation depends on the force with whlch 3 the pins and the washer 22 are urged together when the pins are enga~ing indentations. Drawing the second connector-part 11 towards the ~irst connector-part beyond the positlon ~t which engagement of indentations by the pins commences, increases this force as a result o~ compression o~ the spring-washer 26.
It will be appreciated that the invention is not limited to the one embodlment described above. In particular, the des~red result o~ greater resi~tance to rotation of the coupling sleeve in the uncoupling dlrection than in the coupling direction can be achieved by the use of thrust-members which are directed, and movable, axially to engage thrust-member-recei~ing regions, each of which is asymmetrical about any plane containing axis of the first connector-part and extend-lng radlally through that region. The thrust-members can be pins, ball~bearings or rollers arranged with thelr axes extending radially with respect to the flrst connector-part. Each thru~t-member-receiving region can be an lndentation having one steep slope and one gradual slope, the arrangement of the slopes being such that, during sequential engagement of indentatlons by thrust-members as the coupling sleeve is rotated in the coupling direction, the thrust-members enter the indentat1ons down the steep slope and leave up the gradual slope. The engagement between the indentations and the thrust-members provides a greater resistance to rotation of the coupling sleeve in the uncoupling direc-tion because the thrust-members must then pass up the steep slopes in order to leave t`ne indentations.
Referring to Figs. 3 to 5~ each figure shows part of a washer 36 arranged ad~acent a flange 37 on a first connector-part. In the front face of the washer 36 there is defined a series of indentations 38, one in-dentation 38 being shown in each flgure. The washer 36and flange 37 are identlcal to the washer 22 and flange 19 shown in Figs. 1 and 2 except for the shape of the indentations and the arrangement of the thrust members supported by the flange. Each indentation 38 has a ~teep slope 39 and a gradual slope 40, and ~s asymmetrl-cal about any plane contalning the axls of the connector part on which the washer 36 i~ mounted and extending radially through the indentation. In Fig. 3 a thrust-member in the form of a ball-bearing 41 ls shown ~up-35 ported in an axially directed bore 42 in the flange 37.The ball-bearing can be replaced by a roller arranged w1th i~s axis extending radially with respect to the flrst connector-part~ if the thrust-member-supporting region i.e., the hole in the flange 37 is prepared accordingly, In Figs. 4 and 5 thrust-members in the form of pins 43 and 44 respectively are shown. In Fig. 4 the pin 43 is supported in an axially directed bore 45 in the flange 37, whereas in Fig. 5 the pin 44 i5 supported in a bore 46 so arranged that the pin is skewed relative to the ax~s of the first part in an identical manner to the s~ewed plns 20 shown in Figs. 1 and 2. Referring now to all of Flgs. 3 to 5 the thrust-members 41, 43, 4~ are each shown in engagement with an indentation 38, the thrust-members having been urged into engagement with the indentations when the two connector-parts approached the fully-mated condltion.
On further rotation of the coupling sleeve in the coup_ ling direction the washer 36 rotates relatlve to the flange 37 and the thrust-members pass up the gradual slopes 40 of the indentation~ 38 and along the face of the washer 36 until they enter the neat indentations down the steep slopes 39. On rotation of the coupling sleeve ln the uncoupling directlon the thrust-members are caused to leave the indentations up the steep slopes 39 whereby the engagement between thrust~members and indentations provides greater resistanca to rotation ~
the coupling sleeve in the uncoupling direction than in the coupling direction.
In the arrangement shown in Fig. 5 the effect of asym~etry of the indentations is added to the effect of asymmetry in the thrust-member supporting regions i.e., the skewing of the pins relative to the axis of the ~irst connector-part.
3 In the embodiment of the invention shown in the drawings the thrust-members are supported in a flange on the first connector-part. An alternative construc-tion is to support the thrust-members in a washer constrained against rotation relative to the first connector-part, for example by means of a key and key-way. The flange 19 shown in the drawings serves to retain the coupling sleeve in the first part in addition to supporting the thrust-members, and if it ~8 replaced by a washer supportlng the thrust-members then some 1~41~S
g other means must be employed to retain the coupling sleeve on the first part. The arrangement of the washers, thrust-members and spring-washer along the axis of the ~irst part need not be as shown in the drawings.
The important considerations are that two annular ele-ments be arranged immediately axially ad~acent, the thrust-member-recelving regions being defined in a first of the annular elements and the thrust-members being ~upported in the second. One of the annular elements must be arranged to rotate relative to the first con-nector-part together with the coupling sleeve and the other annular element must be con~tra~ned against rotation relative to the first connector-part. Means must be provided to urge the thrust-members and the first annular element towards one another to cause sequential engagement of thrust-member-receiving regions ~y the thrust-members when~ and only when, the two connector-part~ approach the fully-mated condition, in orde~ that the sequential engagement provides an audible indicatlon of the relative positions of the two connector-parts.
TECHNICAL FIELD
The invention relates to screw-coupled electrical connectors.
BACKGROUND OF THE PRIOR ART
In a screw-coupled electrical connector, an inter-nally screw-threaded coupling sleeve is mounted on a first of the parts to enable the second connector-part, which is provided with an external screw-thread, to be drawn towards the first part. Hereinafter the expressions "coupling di-rection of rotation of the coupling sleeve" and "uncoupling direction of rotation of the coupling sleeve" means respec-tively the directions in which the coupling sleeve is ro-tated to draw the connector parts together and to enable separation of the two connector parts. It is known to pro-vide screw-coupled electrical connectors with means for providing an indication of the fact that two parts are approaching or have reached the fully mated condition and for resisting subsequent rotation of the coupling sleeve in the uncoupling direction. To this end it has been pro-posed to provide a series of circumferentially spaced smal-ler movable balls mounted in a flange on the first con-nector pa~-t and a series of holes in a flange on the coup-ling sleeve. As the coupling sleeve is rotated in the coupling direction the balls sequentially engage the holes and in doing so provide audible clicks. When the connector-parts are fully-mated, the engagement between the balls and the holes provides resistence to rotation of the coup-ling sleeve in the uncoupling direction which could result, for example, from vibration. It has also been proposed to replace the balls and holes by protrusions and inden-tations which may be defined on washers instead of flanges.
BRIEF SUMMARY OF THE INVENTION
According to the invention, there is provided a first connector part for connecting with a mating connector part to form a two-part, rotatably-coupled electrical con-nector, wherein there is provided a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, comple-`,~j.~, ~4~35 mentary connector part to be drawn towards the first con-nector part by complementary engaging means between the coupling sleeve and the complementary connector part, and wherein there are provided first and second annular ele-ments arranged coaxially with the first part and immedi-ately axially adjacent to one another, the first annular element having a set of circumferentially spaced thrust-member-receiving regions, the second annular element being provided with a plurality of thrust-members supported in a set of thrust-member-supporting regions provided in the second annular element, one of the annular elements being arranged to rotate relative to the first part together with the coupling sleeve and the other annular element being constrained against rotation relative to the first part, there being further provided resilient means for urging the thrust-members and the first annular element towards one another and to cause sequential engagement of the thrust-member-receiving regions by the thrust-members when the two connector parts approach the fully-mated conditions, wherein each of the regions in the setof thrust-member-supporting regions is asymmetrical about any plane containing the axis of the first connector part and extending radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of the coupling sleeve in the uncoupling di-rection than in the coupling direction.
In a preferred embodiment of the invention, the thrust-members are pins and the asymmetry is such that the pins are skewed relative to the axis of the first connec-tor-part. The skewing of the pins is such that the pins are inclined relative to their contact with the first an-nular element in the direction in which they move relative to the first annular element when the coupling sleeve is rotated in the coupling direction.
The thrust-member receiving regions can be, for example, in the form of part-spherical indentations, whereby the resistance to rotation of the coupling sleeve by virtue solely of the inclination of the pins is greater in the direction of uncoupling than in the directlon of coupling. Such dlfferentlal reslstance can be alded by applylng the said asymmetry to the indentatlons in addltlon to the thrust-member supporting regions, BRIEF DESCRIPTION OF THE DRAWINGS
The inventlon will be further described by way o~ example and wlth reference to the accompanying draw-ings, in which:
Flg. 1 is a side elevation, partly ln sectlon, of two parts of a screw-coupled electrlcal connector having a ~irst connector-part constructed according to the inventlon;
Fig. 2 ls a view of the first connector-part and coupling sleeve in the direction indicated by the arrow II in Fig. 1, part of the coupling sleeve being cut away; and Figs. 3 to ~ are each a sect10n through a thrust-member, and through parts of a washer and a flange on a first connector-part constructed according to the inven-tion.
DETAILED DESCR~PTION OF THE INVENTION
Referring to the drawings, Fig. 1 shows a screw-coupled electrical connector comprislng a first connec-tor-part 10 and a second connector-part 11. me first and ~econd connector-parts are generally cyllndrical and have inserts 12 and 13, respectively, of an elec-trlcally insulating material which support sockets 14 and complementary contact pins 1~ respectlvely. Only one socket and one contact pln are shown in Flg. 1. A
coupling sleeve 16 is mounted coaxially and rot~tably on the first part 10 and is provided with an ~nternal 3crew-thread 17 at its forward end, i.e., the end neare~t the second connector-part. The second connector-3~ part i~ provided w~th a complementary external screw-thread 18 to enable the second part to be drawn towards the fir~t part by rotation of the coupling sleeve 16 in the coupling direction.
A plurality of thrust-members in the form of ~35 plns 20 are slldably supported in a set of thrust-member-supporting regions, which are bores 21 ln a radially outwardly extending annular ~lange 19 on the flrst part 10. Immediately to the rear of the flange 19 ls a washer 22, in the front face of which there is defined a set of circumferentially spaced thrust-member-recelving reglons, whlch are part-spherlcal indentations 23 arranged to be engageable by the pins 20. The washer 22 has two keys 24 which extend radially outwardly to engage ~eyways 25 ln the coupling sleeve 16, whereby the washer 22, although axlally movable relative to the coupling sleeve 16 and first part 10, is constrained to rotate with the coupllng sleeve 16 relat~ve to the first part 10.
Only one pln 20, one bore 21, one indentation 23, one key 24 and one keyway 25 are shown in Flg. 1.
Referring now to Fig. 2, each of the thrust-member-supporting regions, i.e., the bores 21, is asymmetrlcal about any plane cont~hing the axis of the flrst part 10 and extending radially through the reglon.
The a~ymmetry is such that the pins 20 are skewed rela-tlve to the axis of the first part, the pin~ belng lnclined relative to their contact with the washer 22 in the dlrection in which they move relatlve to the washer 22 when the coupling sleeve 16 is rotated in the coupllng dlrection. The pins 20 are preferably lnclined through approximately 10 from parallellsm with the axis o~ the fir~t part 10. There are preferably more lndenta-tlon~ 23 than pins 20, for example, there are preferably 3 three pins and twelve lndentatlons. The plns and indentatlons ~hould be evenly spaced and the number of indentatlons should be an integral multlple of the number of pins, whereby when one pin is in engagement wlth an indentation the rema~nder of the pins are also ln engagement with indentations. For clarlty, the k#y 24 shown in Fig. 1 has been omitted rrom Fig. 2.
Referring again to Fig. 1, to the rear of the washer 22 i9 a spr~ng-washer 26, a washer 27 and a retaining washer 28 which ls located in an annular 1~4~WS
groove 29 in the internal surface of the coupling æleeve 16. The spring-washer 26 is in compression between the washer 22 and the wa~her 27, the rear face of whlch acts against the retaining washer 28, whereby the spring-washer serves to urge the wa,~,her 22 forwardly intoengagement wlth the annular flange 19 and to urge the coupling sleeve 16 rearwardly relative to the first pa,rt 10 such that an abutment ,urface 30 extending radia,lly inwardly from the coupling sleeve abuts against the front face of the annular flange 19 on the f'irst part. Thus the arrangement of spring washer 26, flange 19 and washers 22, 27 and 28 serves to retain the coupling 8 leeve 16 on the flrst part , The forward ends of the pins 20 enEage an axlal_ ly movable thrust-washer 31, the movement of which, relative to the coupling sleeve 16, i,~, limited in the forward direction by engagement with an abutment surface 32 extending radially inwardly from the coupling sleeVe.
-~ The length of the pin~ 20, the thickness of' the annular flange 19, and the dlstance between the two abutment 3urf"aces 30 and 32 are such that when the coupling sleeve 16 is in its rearwardmost po,~31tion relatlve to the first part 10 (i.e., when the abutment surface 30 is engaging the f'lange 19) and when the pins 20 are ln their for-wardmost positlons relatiVe to the first part 10 (i.e.~when the pins are engaging the thrust-washer 31 which is engaging the abutment surf'ace 32), the rear ends of the plns 20 do not pro,~ect f'rom the bore, 21 in the ftlange 19. This situation is shown in Figs. 1 and 2. In this 3 situation the coupling ~,leeve 16 together with the washer 22 can rotate f'reely wlth re~,pect to the f'irst connector;~art 10 without the indentations 23 being engaged by the pins 20.
The spring-washer 26, washer 27, retalnlng 3~ washer 28, thrust-washer 31 and insert 12 are also shown in Fig. 2.
To couple the two connector-parts, they are moved together in a relatlve orientation which allows a key 33 on the f'irst part to enEage a keyway 34 in the 3~41835 ~econd part (see Flg. 1). The key 33 and keyway 34 are provided to ensure that the two parts are coupled only ln the orlentation in which the contact pins 15 mate wlth the corresponding sockets 14. me screw-thread 17 in the coupling sleeve 16 is caused to engage the screw-thread 18 on the second connector-part and the coupling sleeve i8 rotated in the coupling direction to draw the two connector-parts together and mate the contact pins with the ~ockets.
When the connector-parts approach the fully-mated conditlon the leading edge 35 of the second part engages the forward face of the thrust-washer 31, and urges the thrust-washer and hence the pins 20 rearwardly relative to the first part. As the two connector-parts are drawn closer together by further rotationof the coupling sleeve 16 in the coupling directlon, the pins 20 are caused to pro~ect from the rear ends of the bores 21 in the flange 19, and to engage the indenta-tions 23 sequentially in the washer 22 as it rotates with the coupling sleeve. The sequential engagement of the indentations 23 by the pins 20 provideR an audlble indication that the two connector-parts have approached the fully-mated condition.
As a result of the skewed arrangement of the plns 20, the engagement between the pins and indentatlon 23 i~ such as to provide a greater resistance to rota-tion of the coupling sleeve 16 in the uncoupllng direc-tion than in the coupling direction. The extent o~ the resistance to rotation depends on the force with whlch 3 the pins and the washer 22 are urged together when the pins are enga~ing indentations. Drawing the second connector-part 11 towards the ~irst connector-part beyond the positlon ~t which engagement of indentations by the pins commences, increases this force as a result o~ compression o~ the spring-washer 26.
It will be appreciated that the invention is not limited to the one embodlment described above. In particular, the des~red result o~ greater resi~tance to rotation of the coupling sleeve in the uncoupling dlrection than in the coupling direction can be achieved by the use of thrust-members which are directed, and movable, axially to engage thrust-member-recei~ing regions, each of which is asymmetrical about any plane containing axis of the first connector-part and extend-lng radlally through that region. The thrust-members can be pins, ball~bearings or rollers arranged with thelr axes extending radially with respect to the flrst connector-part. Each thru~t-member-receiving region can be an lndentation having one steep slope and one gradual slope, the arrangement of the slopes being such that, during sequential engagement of indentatlons by thrust-members as the coupling sleeve is rotated in the coupling direction, the thrust-members enter the indentat1ons down the steep slope and leave up the gradual slope. The engagement between the indentations and the thrust-members provides a greater resistance to rotation of the coupling sleeve in the uncoupling direc-tion because the thrust-members must then pass up the steep slopes in order to leave t`ne indentations.
Referring to Figs. 3 to 5~ each figure shows part of a washer 36 arranged ad~acent a flange 37 on a first connector-part. In the front face of the washer 36 there is defined a series of indentations 38, one in-dentation 38 being shown in each flgure. The washer 36and flange 37 are identlcal to the washer 22 and flange 19 shown in Figs. 1 and 2 except for the shape of the indentations and the arrangement of the thrust members supported by the flange. Each indentation 38 has a ~teep slope 39 and a gradual slope 40, and ~s asymmetrl-cal about any plane contalning the axls of the connector part on which the washer 36 i~ mounted and extending radially through the indentation. In Fig. 3 a thrust-member in the form of a ball-bearing 41 ls shown ~up-35 ported in an axially directed bore 42 in the flange 37.The ball-bearing can be replaced by a roller arranged w1th i~s axis extending radially with respect to the flrst connector-part~ if the thrust-member-supporting region i.e., the hole in the flange 37 is prepared accordingly, In Figs. 4 and 5 thrust-members in the form of pins 43 and 44 respectively are shown. In Fig. 4 the pin 43 is supported in an axially directed bore 45 in the flange 37, whereas in Fig. 5 the pin 44 i5 supported in a bore 46 so arranged that the pin is skewed relative to the ax~s of the first part in an identical manner to the s~ewed plns 20 shown in Figs. 1 and 2. Referring now to all of Flgs. 3 to 5 the thrust-members 41, 43, 4~ are each shown in engagement with an indentation 38, the thrust-members having been urged into engagement with the indentations when the two connector-parts approached the fully-mated condltion.
On further rotation of the coupling sleeve in the coup_ ling direction the washer 36 rotates relatlve to the flange 37 and the thrust-members pass up the gradual slopes 40 of the indentation~ 38 and along the face of the washer 36 until they enter the neat indentations down the steep slopes 39. On rotation of the coupling sleeve ln the uncoupling directlon the thrust-members are caused to leave the indentations up the steep slopes 39 whereby the engagement between thrust~members and indentations provides greater resistanca to rotation ~
the coupling sleeve in the uncoupling direction than in the coupling direction.
In the arrangement shown in Fig. 5 the effect of asym~etry of the indentations is added to the effect of asymmetry in the thrust-member supporting regions i.e., the skewing of the pins relative to the axis of the ~irst connector-part.
3 In the embodiment of the invention shown in the drawings the thrust-members are supported in a flange on the first connector-part. An alternative construc-tion is to support the thrust-members in a washer constrained against rotation relative to the first connector-part, for example by means of a key and key-way. The flange 19 shown in the drawings serves to retain the coupling sleeve in the first part in addition to supporting the thrust-members, and if it ~8 replaced by a washer supportlng the thrust-members then some 1~41~S
g other means must be employed to retain the coupling sleeve on the first part. The arrangement of the washers, thrust-members and spring-washer along the axis of the ~irst part need not be as shown in the drawings.
The important considerations are that two annular ele-ments be arranged immediately axially ad~acent, the thrust-member-recelving regions being defined in a first of the annular elements and the thrust-members being ~upported in the second. One of the annular elements must be arranged to rotate relative to the first con-nector-part together with the coupling sleeve and the other annular element must be con~tra~ned against rotation relative to the first connector-part. Means must be provided to urge the thrust-members and the first annular element towards one another to cause sequential engagement of thrust-member-receiving regions ~y the thrust-members when~ and only when, the two connector-part~ approach the fully-mated condition, in orde~ that the sequential engagement provides an audible indicatlon of the relative positions of the two connector-parts.
Claims (11)
1. A first connector part for connecting with a mating connector part to form a two-part, rotatably-coupled electrical connector, said first connector part comprising:
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary con-nector part; first and second annular elements arranged co-axially with said first part and immediately axially adjacent to one another, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, one of said annular elements being arranged to rotate relative to the first part together with the coupling sleeve, and the other annular element being constrained against rotation relative to the first part; resilient means for urging the thrust-members and said first annular element towards one another and to cause sequential engagement of said thrust-member-receiving regions by said thrust-members when the two connector parts approach the fully-mated condition; wherein each of the regions in the set of thrust-member-supporting regions is asymmetrical about any plane containing the axis of said first connector part and extending radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
?
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary con-nector part; first and second annular elements arranged co-axially with said first part and immediately axially adjacent to one another, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, one of said annular elements being arranged to rotate relative to the first part together with the coupling sleeve, and the other annular element being constrained against rotation relative to the first part; resilient means for urging the thrust-members and said first annular element towards one another and to cause sequential engagement of said thrust-member-receiving regions by said thrust-members when the two connector parts approach the fully-mated condition; wherein each of the regions in the set of thrust-member-supporting regions is asymmetrical about any plane containing the axis of said first connector part and extending radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
?
2. The first connector part as claimed in claim 1, wherein the thrust-members are pins slidably mounted in the thrust-member supporting regions, the asymmetry of the thrust-member-supporting regions being such that the pins are skewed relative to the axis of the first part
3. The first connector part as claimed in claim 2, wherein the pins are inclined through approximately 10°
from parallelism with the axis of the first part.
from parallelism with the axis of the first part.
4. The first connector part as claimed in claim 1, wherein said thrust-member receiving regions are sub-stantially part-spherical indentations in said first annular element.
5. A first connector part for connecting with a mating connector part to form a two-part, rotatably-coupled electrical connector, said first connector part comprising:
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary connector part; first and second annular elements arranged coaxially with said first part and immediately axially ad-jacent to one another, said first annular element being arranged to the rear of said second annular element, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, one of said annular elements being arranged to rotate relative to the first part together with the coupling sleeve, and the other annular element being con-strained against rotation relative to the first part;
resilient means for urging said first annular element for-wardly towards the rear face of said second annular element, said thrust members being arranged to be urged rearwardly towards said first annular element by said mating connector part when the two connector parts approach the fully-mated condition; wherein each of the regions in at least one of said sets of regions is asymmetrical about any plane con-taining the axis of the said first connector part and exten-ding radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary connector part; first and second annular elements arranged coaxially with said first part and immediately axially ad-jacent to one another, said first annular element being arranged to the rear of said second annular element, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, one of said annular elements being arranged to rotate relative to the first part together with the coupling sleeve, and the other annular element being con-strained against rotation relative to the first part;
resilient means for urging said first annular element for-wardly towards the rear face of said second annular element, said thrust members being arranged to be urged rearwardly towards said first annular element by said mating connector part when the two connector parts approach the fully-mated condition; wherein each of the regions in at least one of said sets of regions is asymmetrical about any plane con-taining the axis of the said first connector part and exten-ding radially through that region, the asymmetry being such that the engagement between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
6. The first connector part as claimed in claim 5, including an axially-movable thrust-washer arranged in front of said second annular element for engagement with the forward ends of said thrust-members, said thrust-washer being engaged and urged rearwardly by the leading edge of said second connector-part when the two connector-parts approach the fully-mated condition, whereby said thrust-members are urged rearwardly towards said first annular element.
7. A first connector part for connecting with a mating connector part to form a two-part, rotatably coupled electrical connector, said first connector part comprising:
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the comple-mentary connector part; first and second annular elements arranged coaxially with said first part and immediately axially adjacent to one another, said first annular element comprising a washer having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, the washer being arranged to rotate relative to the first part together with the coupling sleeve, and the second annular element being constrained against rotation relative to the first part; resilient means for urging the thrust-members and said first annular element towards one another and to cause sequential engagement of said thrust-member-receiving regions by said thrust-members when the two connector parts approach the fully-mated condition;
wherein each of the regions in at least one of said sets of regions is asymmetrical about any plane containing the axis of the said first connector part and extending radially through that region, the asymmetry being such that the engage-ment between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
a coupling sleeve mounted coaxially and rotatably thereon to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the comple-mentary connector part; first and second annular elements arranged coaxially with said first part and immediately axially adjacent to one another, said first annular element comprising a washer having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of thrust-members supported in a set of thrust-member-supporting regions in said second annular element, the washer being arranged to rotate relative to the first part together with the coupling sleeve, and the second annular element being constrained against rotation relative to the first part; resilient means for urging the thrust-members and said first annular element towards one another and to cause sequential engagement of said thrust-member-receiving regions by said thrust-members when the two connector parts approach the fully-mated condition;
wherein each of the regions in at least one of said sets of regions is asymmetrical about any plane containing the axis of the said first connector part and extending radially through that region, the asymmetry being such that the engage-ment between thrust-members and thrust-member-receiving regions provides more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
8. The first connector part as claimed in claim 7, wherein said second annular element is an annular flange extending radially outwardly from said first connector part,
9. The first connector part as claimed in claim 8, wherein said first connector part further comprises: a first abutment surface extending radially inwardly from said coupling sleeve for engagement with the front face of the said annular flange on said first connector part; a spring-washer for urging said coupling sleeve rearwardly with re-spect to said first connector part by the action of said spring-washer which is in compression between a retaining washer located in an annular groove near the rear end of said coupling sleeve and said washer which is arranged to the rear of the said flange; an axially-movable thrust-member arranged in front of said flange for engagement with the forward ends of said thrust-members, the forward axial movement of said thrust-washer being limited by engagement with a second abutment surface extending radially inwardly from said coupling sleeve, the width of the said flange, the distance between said first and second abutment surfaces, and the dimensions of said thrust-members being such that when said coupling sleeve is in its rearwardmost position relative to said first connector part and said thrust-members are in their forwardmost positions relative to said first connector part, the rear ends of said thrust-members do not engage said thrust-member-receiving regions.
10. The first connector part as claimed in claim 1, wherein said sequential engagement of thrust-member-receiving regions by thrust-members is such as to provide an audible indication that the two connector-parts have approached the fully-mated condition.
11. A first connector part for connecting with a mating connector part to form a two-part, rotatably-coupled electrical connector, said first connector part comprising:
a coupling sleeve carried by said first connector part to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary connector part; first and second annular elements arranged coaxially with said first connector part and immediately adjacent to one another, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of pins supported in a set of thrust-member-supporting regions in said second annular element, the pins being skewed relative to the axis of the first connector part; and resilient means for urging the pins and said first annular element towards one another to cause sequential engagement of the pins in said thrust-member-receiving regions when the two connector parts approach the fully-mated condition, said skewed pins providing more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
a coupling sleeve carried by said first connector part to enable a mating, complementary connector part to be drawn towards said first connector part by complementary engaging means between the coupling sleeve and the complementary connector part; first and second annular elements arranged coaxially with said first connector part and immediately adjacent to one another, said first annular element having a set of circumferentially spaced thrust-member-receiving regions, said second annular element including a plurality of pins supported in a set of thrust-member-supporting regions in said second annular element, the pins being skewed relative to the axis of the first connector part; and resilient means for urging the pins and said first annular element towards one another to cause sequential engagement of the pins in said thrust-member-receiving regions when the two connector parts approach the fully-mated condition, said skewed pins providing more resistance to rotation of said coupling sleeve in the uncoupling direction than in the coupling direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7904066 | 1979-02-06 | ||
| GB79/04066 | 1979-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1141835A true CA1141835A (en) | 1983-02-22 |
Family
ID=10502983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000345035A Expired CA1141835A (en) | 1979-02-06 | 1980-02-04 | Screw-coupled electrical connectors |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4322121A (en) |
| JP (1) | JPS55130085A (en) |
| CA (1) | CA1141835A (en) |
| FR (1) | FR2448794A1 (en) |
| GB (1) | GB2045010B (en) |
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| US10211547B2 (en) | 2015-09-03 | 2019-02-19 | Corning Optical Communications Rf Llc | Coaxial cable connector |
| US9525220B1 (en) | 2015-11-25 | 2016-12-20 | Corning Optical Communications LLC | Coaxial cable connector |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2728895A (en) * | 1954-10-04 | 1955-12-27 | Whitney Blake Co | Self-locking coupling device |
| US3601764A (en) * | 1969-01-28 | 1971-08-24 | Bunker Ramo | Lock device for coupling means |
| US3594700A (en) * | 1969-08-20 | 1971-07-20 | Pyle National Co | Electrical connector with threaded coupling nut lock |
| US3750087A (en) * | 1971-10-26 | 1973-07-31 | Trw Inc | Preloaded electrical connector |
| US3786396A (en) * | 1972-04-28 | 1974-01-15 | Bunker Ramo | Electrical connector with locking device |
| US3971614A (en) * | 1972-11-03 | 1976-07-27 | Akzona Incorporated | Electrical connector with means for maintaining a connected condition |
| US3808580A (en) * | 1972-12-18 | 1974-04-30 | Matrix Science Corp | Self-locking coupling nut for electrical connectors |
| US3917373A (en) * | 1974-06-05 | 1975-11-04 | Bunker Ramo | Coupling ring assembly |
| US4109990A (en) * | 1977-05-26 | 1978-08-29 | The Bendix Corporation | Electrical connector assembly having anti-decoupling mechanism |
-
1980
- 1980-02-01 US US06/117,890 patent/US4322121A/en not_active Expired - Lifetime
- 1980-02-04 CA CA000345035A patent/CA1141835A/en not_active Expired
- 1980-02-06 FR FR8002889A patent/FR2448794A1/en active Granted
- 1980-02-06 GB GB8003998A patent/GB2045010B/en not_active Expired
- 1980-02-06 JP JP1256980A patent/JPS55130085A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US4322121A (en) | 1982-03-30 |
| GB2045010B (en) | 1983-06-15 |
| JPS55130085A (en) | 1980-10-08 |
| FR2448794B1 (en) | 1983-11-18 |
| GB2045010A (en) | 1980-10-22 |
| FR2448794A1 (en) | 1980-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |