CA1124287A - Fuse holder for an automotive fuse terminal block - Google Patents

Fuse holder for an automotive fuse terminal block

Info

Publication number
CA1124287A
CA1124287A CA343,639A CA343639A CA1124287A CA 1124287 A CA1124287 A CA 1124287A CA 343639 A CA343639 A CA 343639A CA 1124287 A CA1124287 A CA 1124287A
Authority
CA
Canada
Prior art keywords
fuse holder
prongs
fuse
wire
attaching
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
Application number
CA343,639A
Other languages
French (fr)
Inventor
Thomas M. Cairns
John H. Dewar
Emmons F. Sumner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Company of Canada Ltd
Original Assignee
Ford Motor Company of Canada Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ford Motor Company of Canada Ltd filed Critical Ford Motor Company of Canada Ltd
Application granted granted Critical
Publication of CA1124287A publication Critical patent/CA1124287A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02Details
    • H01H85/20Bases for supporting the fuse; Separate parts thereof
    • H01H85/203Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals
    • H01H85/2035Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals for miniature fuses with parallel side contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02Details
    • H01H85/20Bases for supporting the fuse; Separate parts thereof
    • H01H2085/2075Junction box, having holders integrated with several other holders in a particular wiring layout
    • H01H2085/208Junction box, having holders integrated with several other holders in a particular wiring layout specially adapted for vehicles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00Electrical connectors
    • Y10S439/948Contact or connector with insertion depth limiter

Abstract

ABSTRACT OF THE DISCLOSURE
This specification discloses a fuse holder for an automotive terminal block for receiving fuses and electrical connections to various electrical components of the automobile. The fuse holder is positioned within the terminal block and is adapted to receive the blade contact of a fuse thereby establishing an electrical connection to the fuse. Typically, the fuse holder has a spring clip with two prongs spring biased against one another so that the blade contact can be resiliently secured between two prongs. The fuse holder can have a pair of attaching prongs to hold a wire providing an electrical connection to the fuse holder. A stop tab is positioned adjacent the attaching prongs so that a wire slipped between the attaching prongs is limited in movement toward the spring clip of the fuse holder so that it does not interfere with entry of the fuse blade between the two prongs.

Description

FUSE HOLDER FOR AN AUTOMOTIVE
FUSE TERMINI~L BLOCK
This invention relates to electrical connectors;
and, more particularly, to the fuse holder within an automotive terminal block which removably secures various connections.
Automobiles typically have a fuse terminal block which is mounted adjacent the instrument panel or forward fire wall to provide a means for securing fuses and for providing connections to various electrical components of an automobile such as headlights, horns, power seats, power windows and numerous electrical options which can be customer selected.
It is particularly desirable that electrical connection can be made to the fuse holder in a rapid and secure manner. The connection should also be such that there is no interference with the insertion of a fuse blade contact into a spring holding clip of a fuse holder. To satisfy the needs of rapid and simple mass production, the connection of an electrical con-ductor to the fuse holder should be completely "fool proof". Because of the desire of the fabricator to use "short cuts" or to otherwise complete the job as quickly as possible without adequate assurance of quality of the completed fuse holder, designing a connection configuration to the fuse holder has presented problems. Further it is desirable to make a fuse holder which uses as little material as possible for a given current carrying capacity as possible and yet has a desired strength. These conflicting require-ments have long posed a problem to designers of fuse holders.
For example, one known configuration taught in U. S. patent 4,097,109 includes a core (or conductor) crimp pair of wings and an insulation crimp pair of wings which are spread apart longitudinally (along the length of an attached wire) to incorporate an integral, h transversely extending bus bar portion. A wire lead ~` z / ~

is crimped between the wings. Aligned with the wire lead are spring clips with the opposing prongs forming a female contact portion for receiving therebetween the blade of a fuse. Incorrect positioning of the wire terminal in the fuse holder can cause the ends of the wire lead to interfere with the female portion or spring. Such interference can cause ll) deflection of the spring thereby misaligning it with a fuse blade, ~2) holding the spring in closed position when strands of the terminal wire are on each side of the prong thereby making insertion of the fuse blade contact difficult, and (3) opening of the spring by insertion of the terminal wire sufficiently far into the spring so that it goes between the prongs and spreads them apart. When the wire enters between the prongs and spreads them apart not only does it make insertion of the fuse blade contact difficult because interference of the wire ends, but it may lead to poor contact or intermittent contact which is difficult to detect and repair. These are some of the problems this invention overcomes.
In accordance with the present invention, there is provided a fuse holder for use in a terminal block for providing connection between an automobile electrical system and fuses used in connection with the automotive electrical system, the fuses being of a miniature nature and having a pair of blade contacts, the fuse holder having a spring clip with a pair of prongs adapted for holding therebetween a blade contact of the fuse and a pair of attachment means for attaching an electrically conductive wire to the fuse holder; the fuse holder further including a stop means longitudinally aligned with the wire to be connected and positioned between the wire and the two prongs of the fuse holder so that portions of the wire do not interfere with the prongs and impede connection to the blade contact of the fuse; the fuse holder including a plurality of spring clips, each having a laterally extending bus bar portion which toge~her form an elongated bus bar from which the spring clips extend at spaced intervals; the elongated bus bar having a first elongated path and a second elongated path, the first and second paths being generally parallel with spacing therebetween, the first and second elongated paths being connected by spaced reinforcing members extending between the first and second paths; at least some of the spaced rein-forcing members having extending therefrom a pair of n attaching prongs for receiving the electrically con-ducting wire of a lead to be connected to the fuse holder so that when an electrical wire is attached to the fuse holder by the attaching prongs, electrical access to the electrical lead is available both through the first path and the second path, thereby, for a given fuse holder width, increasing the current carrying capacity of the fuse holder in comparison to a fuse holder having a single path.
The fuse holder of this invention, therefore, has a pair of attachment means for attaching a wire to the fuse holder and includes a stop means longi-tudinally aligned with the wire to be connected and positioned between the wire and two prongs of the fuse holder, i.e., spring clips, adapted for holding therebetween a fuse blade contact. The stop means limits the travel of a wire toward the prongs when the wire is being positioned for connection. As a result, portions of the wire do not become~entan~led between the prongs and impede connection to the blade contact to the fuse holder.
3n The assembly of the terminal connection to the fuse holder as well as the connection of the fuse to the fuse holder is made substantially simpler and less prone to error.
The result is improved reliability and ease of fabrication.
This invention further recognizes that a dOublê
current path between adjacent spring clips can increase the current carrying capacity from a wire lead to spring clips along the fuse holder. By providing two paths there is a reduction in the heat generated and an increase in the Y ,a ~.

r~ r~

electrical current rating of the fuse holder.
The invention is described further, by way of illustration, with reference to the accompanying drawings, wherein:
Figure 1 is a perspective view of a fuse holder in accordance with an ~mbodiment of this invention;
Figure 2 is a side, partly section, view of a fuse holder positioned in a terminal block in accordance with an embodiment of this invention; and Figure 3 is a front, partly section, view of the assembly in Figure 2 showing a stop tab separating the attaching prongs of the terminal wire from the spring clips for holding the fuse blade contact.
Referring to Figures 2 and 3, a terminal block has the general shape of a rectangular solid with a plurality of passages 15 extending therethrough between a front ~or top) surface 17 and a rear (or bottom) surface 18.
At least some of passages 15 from top surface 17 of terminal block 10 are designed to receive a fuse 40 having a pair of spaced blade contacts 41. Fuse 40 is advantageously a miniature plug-in fuse similar to that described in U.S.
patent 3,909,767 issued September 30, 1975 and assigned to Littelfuse, Inc. At least some of passages 15 are access-ible from bottom surface 18 f terminal block 10 and are adapted to receive a fuse holder 20 as shown in Figures
2 and 3. Further, various accessory connections can be made from the bottom or top of terminal block 10 to fuse holder 20 or, in some cases, directly to blade contacts 41 of fuse 40.
Fuse holder 20 has a longitudinally extending bus bar 22 having laterally extending spring clips 23, each having a pair of prongs 21 ~Figure 1). Fuse holder - 20 typically has a plurality of spring clips 23 along its length and at least a pair of attaching prongs 201 for connecting to a conducting wire 203. Prongs 21 have an outside portion 24, an intermediate portion 25 and an end portion 26 ~Figure 3). Between outside portion 24 and . ~

r ~ jt~t~

intermediate portion 25 there is a fold or bend and there is another fold or bend between intermediate portion 25 and end portion 26. Accordingly, spring clip 23 comprises two prongs 21 which are folded back on themselves twice so that the end portions 26 of each prong 21 bear resi-liently against the outside portions 24 and the intermediate portions 25 of the two prongs 21 bear against each other.
In use, a blade contact 41 of fuse 40 is held resiliently between intermediate portions 25 of the two prongs 21.
Fuse holder 20 also includes an opening 28 associated with each spring clip 23 which acts in cooperation with a portion of terminal block 10 to secure fuse holder 20 in terminal block 10.
Fuse 40 is a relatively small, flat element which includes a flat sheet metal stamping 42 partially situated within a plastic housing 43 (Figure 2). Stamping 42 includes a fuse element 44, and blade contacts 41 which are a pair of laterally spaced protruding contact elements which are to be received between prongs 21 of spring clip 23 which is part of fuse holder 20.
This invention is directed toward a generally rectangular planar stop tab 202 which is positioned between spring clip 23 and attaching prongs 201 along a plane separating them. Attaching prongs 201 are spaced extensions for crimping therebetween the exposed conducting wire 203 of an electrical lead 204 to be connected to fuse holder 20.
Stop tab 202 is particularly advantageous because it can be integrally formed of the material used to form fuse holder 20. That is, fuse holder 20 can be formed in a progressive die and can include the step of folding stop tab 202 thereby forming an opening 28 which is useful in retaining fuse holder 20 in terminal block 10.
This invention is also directed to recognizing that sufficient cross sectional area must be maintained on either side of stop tab 202, in a current conducting area 205, so that sufficient current can be carried between conducting wire 203 and spring clip 23. That is, it must be recognized that folding stop tab 202 takes ,- ,, away a portion of the conducting cross section and limits the conducting cross section at stop tab 202 to the current conducting area 205.
Fuse holder 20 includes a current path 230 and 5 a current path 231 which are parallel extensions along bus bar 22 and have spaced, transverse reinforcing members 232. Alternate ones of reinforcing members 232 support attaching prongs 201. As a result, current flow from conducting wire 203 connected to attaching prongs 201 can flow down bus bar 22 along two current paths 230 and 231. This increases reliability by providing alternate paths and increases the cross section through which current can flow from conducting wire 203.
Referring to Figs. 1 and 3, a pair of securing prongs 208 are positioned on the opposite side of current path 231 from attaching prongs 201. Securing prongs 208 grasp the insulation of electrical lead 204 and provide additional support for electrical lead 204.
The spacing of securing prongs 208 from attaching prongs 201 is sufficient to permit access to conducting wire 203 by current path 231.
A typical material for fuse holder 20 is CDA-194 copper alloy. A typical length for prongs 201 is 0.30 inches. A typical width for stop tab 202 is 0.13 inches, with a spacing of 0.13 inch from the bottom fold of prongs 201 and a spacing of 0.12 inch from the top of attaching prongs 201.
Various modifications and variations will no doubt occur to those skilled in the various arts to which this invention pertains. For example, the particular shape of the stop tab may be varied from that disclosed herein. These and all other variations which basically rely on the teachings through which this disclosure has advanced the art are properly considered within the scope of this invention.

Claims (5)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A fuse holder for use in a terminal block for providing connection between an automobile electrical system and fuses used in connection with the automotive electrical system, said fuses being of a miniature nature and having a pair of blade contacts, said fuse holder having a spring clip with a pair of prongs adapted for holding therebetween a blade contact of said fuse and a pair of attachment means for attaching an electrically conductive wire to said fuse holder, said fuse holder further including a stop means longitudinally aligned with the wire to be connected and positioned between the wire and said two prongs of said fuse holder so that portions of said wire do not interfere with said prongs and impede connection to said blade contact of the fuse;
said fuse holder including a plurality of spring clips, each having a laterally extending bus bar portion which together form an elongated bus bar from which said spring clips extend at spaced intervals;
said elongated bus bar having a first elongated path and a second elongated path, said first and second paths being generally parallel with spacing therebetween, said first and second elongated paths being connected by spaced reinforcing members extending between said first and second paths;
at least some of said spaced reinforcing members having extending therefrom a pair of attaching prongs for receiving the electrically conducting wire of a lead to be connected to said fuse holder so that when an electrical wire is attached to said fuse holder by said attaching prongs, electrical access to said electrical lead is avail-able both through said first path and said second path, thereby for a given fuse holder width, increasing the current carrying capacity of said fuse holder in comparison to a fuse holder having a single path.
2. The fuse holder of Claim 1 further comprising a pair of securing prongs which are positioned on the other side of said second conducting path from said attaching prongs, said securing prongs being aligned with said attaching prongs so that said securing prongs can grasp the insulating material surrounding the wire lead, thereby improving the physical connection between said fuse holder and said wire lead.
3. The fuse holder of Claim 2 wherein said securing prongs, said attaching prongs and said spring clips are aligned.
4. The fuse holder of Claim 3 wherein said stop means is longitudinally aligned with said attaching prongs so that said stop means prevents inadvertent insertion of said wire lead into said spring clip.
5. A fuse holder of Claim 4 wherein only alternate reinforcing members include attaching prongs.
CA343,639A 1979-03-01 1980-01-14 Fuse holder for an automotive fuse terminal block Expired CA1124287A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/016,580 US4221456A (en) 1979-03-01 1979-03-01 Fuse holder for an automotive fuse terminal block
US16,580 1979-03-01

Publications (1)

Publication Number Publication Date
CA1124287A true CA1124287A (en) 1982-05-25

Family

ID=21777882

Family Applications (1)

Application Number Title Priority Date Filing Date
CA343,639A Expired CA1124287A (en) 1979-03-01 1980-01-14 Fuse holder for an automotive fuse terminal block

Country Status (2)

Country Link
US (1) US4221456A (en)
CA (1) CA1124287A (en)

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US4531808A (en) * 1983-05-16 1985-07-30 Ford Motor Company Blade coupling terminal
US4687270A (en) * 1986-07-18 1987-08-18 General Motors Corporation Fuse package
US4722701A (en) * 1986-09-29 1988-02-02 Todd Engineering Sales, Inc. Fuse block for miniature plug-in blade-type fuse
JPS63104064A (en) * 1986-10-22 1988-05-09 Sharp Corp Toner for electrophotography
JPH01501584A (en) * 1986-12-16 1989-06-01 ゴールド セキュリティーズ オーストラリア リミテッド electrical connector
GB8717202D0 (en) * 1987-07-21 1987-08-26 Lucas Ind Plc Fuse clip assembly
AT392174B (en) * 1988-04-08 1991-02-11 Zumtobel Ag CONTACTING TERMINAL FOR CONNECTING WIRE ELECTRICAL DEVICES
US4842534A (en) * 1988-10-14 1989-06-27 Interlock Corporation Fuse/bus bar assembly
JPH0334851Y2 (en) * 1989-01-25 1991-07-24
US5197906A (en) * 1989-01-25 1993-03-30 Yazaki Corporation Resilient terminal with buckling prevention mechanism
US5417589A (en) * 1993-01-21 1995-05-23 Sumitomo Wiring Systems, Ltd Linked electrical connectors
US5476395A (en) * 1993-03-01 1995-12-19 Methode Electronics, Inc. Planar fuse panel
US5509819A (en) * 1994-08-08 1996-04-23 General Motors Corporation Low profile splice bussing plate
US6327128B1 (en) * 1998-10-07 2001-12-04 Electro-Dyn Electronics Corporation Automotive bridge rectifier assembly with thermal protection
US6621703B2 (en) 1998-10-07 2003-09-16 Electro-Dyn Electronics Corporation Automotive bridge rectifier assembly with thermal protection
US7077667B2 (en) * 2003-04-22 2006-07-18 Yazaki Corporation Electrical junction box
US7247269B2 (en) * 2003-07-21 2007-07-24 Biosense Webster, Inc. Method for making a spiral array ultrasound transducer
JP4707709B2 (en) * 2004-03-05 2011-06-22 リッテルフューズ,インコーポレイティド Thin automotive fuse
US8077007B2 (en) 2008-01-14 2011-12-13 Littlelfuse, Inc. Blade fuse
US9415730B2 (en) 2008-04-23 2016-08-16 Littlefuse, Inc. Flexible power distribution module cover assembly
US7955133B2 (en) * 2008-04-23 2011-06-07 Littelfuse, Inc. Flexible power distribution module
US8446058B2 (en) 2010-09-20 2013-05-21 General Electric Company Electric motor terminal block assembly
EP4248478A1 (en) 2020-11-20 2023-09-27 Wöhner Besitz GmbH Fuse holder
US11381020B1 (en) * 2021-01-25 2022-07-05 TE Connectivity Services Gmbh Electrical terminal for mating with two coplanar tabs

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US2938190A (en) * 1955-09-30 1960-05-24 Molex Products Co Electrical connector arrangements
US2982938A (en) * 1956-03-14 1961-05-02 Jr Ferdinand Klumpp Insulation piercing terminal
US4097109A (en) * 1977-06-27 1978-06-27 General Motors Corporation Accessory electrical connector

Also Published As

Publication number Publication date
US4221456A (en) 1980-09-09

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