DE8602238U1 - Mouth pipe with a spray head for dispensing a medium to be inhaled from a spray can - Google Patents

Description

description

The invention relates to a leadpipe of the type mentioned in the preamble of claim 1. 5

In such lead pipes there is a need that its user automatically after a certain number of successive Dosages are prevented from taking further dosages immediately following z-y, since this can lead to damage to health.

The object of the invention is to design a leadpipe of the type mentioned in the preamble of claim 1 that after a predetermined number of successive actuations of the spray can, i.e. of dosages, a blocking function occurs automatically, which means that no further actuation of the spray can without special manipulation to remove the lock function.

With a Mur & ohr of the type mentioned, this task is through the features specified in the characterizing part of claim 1 solved.

The leadpipe according to the invention is characterized in that the locking ring attached to the spray can in a form-fitting manner with each relative movement of the spray can with respect to the spray head to open the valve is, wherein it cooperates with a locking pin such that with this relative movement of the locking pin also in is displaced in the axial direction in the direction of the end face of the spray head. On the other hand is the locking pin and preferably the locking ring is provided with cam surfaces and cams which interact with one another in such a way that that the locking pin remains in its axial position reached in each case during said relative movement, so with a relative movement in the opposite direction to

Closing the valve of the spray can cannot join this movement in the opposite direction. In the event of a subsequent relative movement to reopen the valve of the spray can, the locking pin is again shifted from an already assumed position in the axial direction towards the end face of the spray head, whereby the axial position of the locking pin achieved again by this relative movement is independent of the subsequent relative movement in the un ^ ekehrfeen Rioht-un ^{17 is} retained. After a predetermined number of displacements of the locking pin in the axial direction, i.e. after a corresponding predetermined number of relative movements to open the valve of the spray can, the locking pin reaches a position in which it positively engages both the locking ring and the end face of the spray head or a this intended stop is acted upon in a blocking manner, so that no further relative movement for opening the valve of the spray can with respect to the spray head is possible. In this way, the number of doses that can be carried out immediately one after the other is limited to a certain number, which is preferably two.

The spray can valve can only be opened again when the locking pin is in his hand Starting position is moved back.

Refinements of the invention are set out in the remaining claims specified.

An embodiment of the invention is explained with reference to the drawing. In detail shows:

Fig. 1 the leadpipe with the locking pin in its starting position,

35

Fig. 2 the leadpipe with the locking pin in a middle

Position he takes after a dosage

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was made, and

Fig «3 the leadpipe with the locking pin in its locking

control at which no further dosing> is to be done *

η As can be seen from the figures, is a conventionally trained in wesentliehen spray head 1 of a mouth _n tube connected to a hollow cylindrical shaft I ¹ I, which houses a spray can 2 at least partially. The part of the spray can 2 facing the spray head 1 is positively connected to a locking ring 3, into the central opening of which the spray can 2 is to be inserted from above. The resting

, _ring 3 is with a radially outwardly extending 15th

Provided web 5, the one extending in the axial direction Guide hole 4 is penetrated. A rod 6 extends integrally with the locking ring 3 from a Place between the guide hole 4 and the central opening of the locking ring 3 parallel to its axis downwards.

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Rod 6 has a radially facing at its lower end

outward facing nooke 7 up.

A locking pin 8 cooperates with the locking ring 3, which is in the

is arranged substantially parallel to the rod 6 and at 25

its lower end carries cam surfaces 9, while at its other end it has two spaced apart in the axial direction Shoulders 10 and 10 'is formed. The locking pin 8 is also provided with an outwardly facing adjusting cam 12, which is secured by an in the outer surface of the spray head 1 formed recess 13 reaches through to the outside.

In Fig. 1, the locking pin 8 is in its starting position

shown, in which he with his first shoulder 10 on the 35th

Web 5 of the locking ring 3 rests. The second shoulder 10 '

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and the adjacent upper free end of the locking pin 8 dips into the guide bore ¹ J of the web 5. The locking pin 8 is axially movably guided on the inner surface of the spray head 1 in a manner not shown here.

If, for the purpose of dosing, the spray can 2 in Fig. 1 is pressed down to open its valve, the locking pin 8 is also displaced axially downward via the locking ring 3 and the first shoulder 10 resting on the web 5, with the lower end face the cam surface 9 rests against the adjacent upper end face of the nook 7 of the rod 6, so that the locking pin 8 is taken along by the locking ring 3 as a whole. During this relative movement, the rod 6 and thus also its cam 7 is elastically bent away from the locking pin 8 with the help of suitable guides or stops provided on the inner surface of the spray head 1, whereby the cam surfaces 9 and the cam 7 at least in the area of the opening position of the Sprühdcre 2 valve disengage. Therefore, if there is then a relative movement between spray head 1 and spray can 2 in the opposite direction to close the valve, then the locking ring 3 is moved back upwards again together with its rod 6 and cam 7; the locking pin 8 cannot follow this movement, however, since it is not acted upon in a movement-transmitting manner either by the web 5 or by the cam 7. When the valve of the spray can 2 is closed, the position of the locking pin 8 shown in FIG. 2 of the drawing is therefore reached. In this position, the second shoulder 10 * of the locking pin 8 now rests on the web 5 of the locking ring 3.

Therefore, if there is a new relative movement between spray can 2 and spray head 1 in order to open the valve of the spray can for a To open subsequent dosing, the sto will turn

Locking ring 3 together with the locking pin 8 from the one shown in FIG is moved axially downwards, at the end of this movement the cam 7 in turn from the cam surfaces 9 of the locking pin 8 is separated, so that during the relative movement in the opposite direction, i.e. upwards, to to close the valve of the spray can again, the locking pin 8 not taken from the position reached in FIG. 3 is, but its free end rather the locking position shown in Figure 3 on itself again in the starting position located locking ring 3 occupies. How this can be seen clearly from a comparison of FIGS. 1 to 3 becomes while the locking pin 8, which is still elastically bent in its starting position in FIG. 1, essentially moves into its straight position in Fig. 3 transferred.

In the position of the locking pin 8 shown in FIG. 3, there is no relative movement between spray head 1 and spray can 2 for the purpose of opening their valve more possible, since a downward movement of the locking ring 3 positively through the Lock pin 8 is locked.

Another dosage with the Munjrohr is only then again possible when the locking pin 8 from its locking position shown in Fig. 3 by acting on the adjusting cam 12 is moved back into its starting position shown in FIG. 1 or into its central position shown in FIG will.

Although in the embodiment of the leadpipe shown, the locking pin and locking ring are designed in this way and each other are assigned that prevents the undertaking of a further dose after two successive doses is, these can also be designed differently to only one or more than two successive doses to be able to make.

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Claims (1)

Protection claims 1. Mouth pipe with a spray head for dispensing one to be inhaled Medium from a spray can having a valve, the valve of which in a relative movement in is open in the axial direction between her and the spray head, characterized in that on the the spray head (1) facing part of the spray can (2) a locking ring (3) can be positively placed, which together is movable with the spray can (2) in the axial direction and with one in the axial direction of the locking ring (3) is displaceable Locking pin (8) cooperates in such a way that it moves with each relative movement to open the valve of the spray can (1) in Towards the end face (11) of the spray head (1) pushed, but held in the reverse relative movement is, so that after a certain number of such shifts it is positively locked between the locking ring (3) and the end face (11) lies and blocks further relative movement for opening the valve. 2. Mundrobr according to claim 1, characterized in that the locking ring (3) has a parallel to its axis guide bore (4) which penetrates a radially outwardly extending web (5) of the locking ring (3), and one between the guide bore (H) and central opening of the locking ring (3) parallel to its axis extending one ^ piece rod (6), at the free end of which a radially outwardly directed cam (7) is provided that the locking pin (7) is essentially extends parallel and adjacent to the rod (6), which at its one end of the cam (7) facing cam surfaces (9) and at its other end at least one shoulder (10) which rests on the web (5), while the adjacent The free end of the locking pin (8) dips into the guide bore (4), and that the locking pin (8) is guided on the inner surface of the spray head (1) so that it can move in the axial direction so that it moves with every relative movement between the spray can (2) and S. spray head (1) is taken from the shoulder (10) abutting web (5) in the direction of the end face (11) of the spray head (1) and with pure cam surfaces (9) on the cam (7) of the rod (6) by one runs past a certain distance, the cam surfaces (9) and the cam (7) are shaped and interact with each other in such a way that a movement of the locking pin (8) towards the end face (11) of the spray head (1) is possible, but in the opposite direction Is blocked. 3- leadpipe according to claim 2, characterized in that g e k e η η that the locking pin (8) has two shoulders (10, 10 ') spaced apart in its axial direction, t Il It lit * one of which in the initial position of the locking pin (8) is at least partially immersed in the guide bore (4). Ij. Leadpipe according to claim 3 *, characterized in that the locking pin (8) is a hand-operated hammer Adjusting cam (12) which through a recess provided in the outer surface of the spray head (1) (13) reaches through to the outside, and with which the locking pin (8) can be moved back into its starting position. 5. mouthpipe according to one of claims 1 to iJ, characterized in that one with the spray head (1) connected to the spray can (2) at least partially receiving hollow cylindrical shaft (1 ¹ O and also the hollow cylindrical part of the spray head (1) an im have substantially elliptical cross-section, within aem the cross-section of the spray can (1) is arranged asymmetrically.