DE29814742U1 - Driving device with a device for fastening an attachment to a base frame - Google Patents

Description

Anton Schiel G 2198

Plastics and Wigs GmbH 19.08.98

Brückenstr. 14
96465 Neustadt/Co.

Driving device with a device for attaching an attachment to a base frame

The invention relates to a vehicle with a chassis with the features specified in the preambles of claims 1 and 2 and the design of a snap closure according to claim 20.

Vehicles with the features specified in the preamble of claim 1 are already known and are used, for example, as strollers, doll's prams, children's sports buggies, buggies, wheelchairs or wheelchairs. Such vehicles have a base frame, on which wheels are attached to the sides in the lower area. In the upper area of the base frame, side struts are provided which form recesses into which the side extensions of the respective seat or reclining attachment can be inserted. The seat or reclining attachment is then attached to the base frame by manually pivoting a rotary lever, which is also attached to the side strut, to close the respective recess.

Furthermore, frames for children's and doll's prams are known, whose bars, rods and pushers are connected to one another in a pivoting manner in order to move the frame from a resting position into an upright position and to be able to use the pusher on both sides by turning it over. With this type of frame, it is

It is usual for at least one such element to be attached to the other in a detachable manner, for which purpose the known rotary levers or connectors mentioned are also used.
5

Based on this state of the art, the invention is based on the task of developing a driving device with the features specified in the generic terms in such a way that the attachment of an attachment to the chassis of the driving device is simplified or a simple coupling between two elements, such as bars, struts or sliders, is possible. A further aim of the invention is to design the attachment or the connection in such a way that it can only be opened again under certain conditions.

This object is achieved in the driving devices according to the generic terms of claims 1 and 2 by the features specified in the characterizing parts of claims 1 and 2. Advantageous embodiments and further developments of the invention result from the dependent claims 3 to 25. Claims 26 - 37 relate to a snap closure which is used as a coupling element.

The advantages of the invention are in particular that the user does not have to take any further steps to attach the attachment to the base frame after it has been put on, i.e. the attachment is done automatically after it has been put on. Furthermore, in the claimed vehicle, no grooves have to be made in the side struts of the base frame to accommodate the extensions of the seat or reclining attachment. The automatic snapping in after the attachment has been put on the base frame also ensures that it is no longer possible to forget to lock it, as was necessary with known fastening devices.

By means of the features of claim 3 it is advantageously achieved that the mentioned device for fastening a seat or lounger attachment to the base frame can be realized comparatively inexpensively, since the further receiving element mentioned in claim 2 can be of simple design and only requires a guide groove.

The snap fastener, which according to the invention is intended for fastening a stroller attachment, can equally also be used directly for connecting the elements of the frame, if this consists, for example, of bars, struts and a slider, which are pivotably coupled to one another and are to be connected to one another in a secured manner at least in their set-up position by a connecting element. For example, the slider, to which a cross brace for a stroller attachment is attached, can be pivotably hinged to a bar of a scissor frame, so that when the slider is pivoted, an extended length is achieved and when the slider is pivoted back parallel to one bar, a shortening occurs. In order to be able to fix the slider in this position, according to claim 2, the same snap fastener can also be used for this purpose. The snap fastener is either attached to the slider or to the bar. The corresponding counterpart has a bolt that protrudes either inwards or outwards as an extension, which is pressed into the insertion groove and activates the mechanism.

Further advantageous properties of the invention will become apparent from the explanation of embodiments based on the figures.

It shows:

FIG 1 is a side view of part of a device for attaching the seat or cot attachment of a stroller to the chassis

of the stroller with the snap fastener closed;

FIG 2 a side view of a part of the device for attaching the seat or bed attachment

of a stroller on the stroller chassis with the snap fastener open;

FIG 3 is a partial sectional view of the device according to FIG 1;

FIG 4 is a partial sectional view of the device according to FIG 2 ;

FIG 5 Diagrams illustrating the operation of the snap device;

FIG 6 is a partial sectional view of a device according to a further embodiment of the invention

FIG 7 shows another embodiment of the invention,

FIG 8 an embodiment of a snap fastener with an additional securing element, wherein the locking lug engages in the groove,

FIG 9 a snap lock according to FIG 8 with a locking projection engaging in a recess ■

a security element, and

FIG 10 shows the snap lock shown in FIGS 8 and 9 in the open position.

The PIG 1 shows a side view of part of a device for fastening the seat or bed attachment of a stroller to the undercarriage of the stroller with the snap fastener closed. In Figure 1, only one of the side struts 1 provided in the upper area of the undercarriage of the stroller is shown. Fasteners 5 and 6 are screwed to this side strut 1 of the undercarriage by means of screw connections 2, 3 and 4.

The fastening means 5 is a snap fastener. This has a plastic molded part 7 consisting of two half shells, whereby the two half shells are connected to one another by means of screws or rivets 8, 9. Within this plastic molded part, which serves as a slide housing, a slide is arranged, which is slidably mounted within the slide housing. A hand lever 10 and a locking lug 11 of this slide are shown in Figure 1. The hand lever 10 is guided through a recess provided on the underside of the slide housing 7 and can be moved in the direction of the arrow x to open the snap fastener. In the closed position of the snap fastener shown in Figure 1, a groove 12 provided in the slide housing is closed by the locking lug 11, so that a cylindrical extension 13 introduced into the groove 12 is fixed in the groove. This cylindrical extension 13 is provided in the lower area of the seat or bed attachment of the stroller and is directed outwards with respect to this attachment. The locking lug 11 has a bevel towards the top, which - as explained below - helps to insert and lock the attachment.

The side strut 1 of the base frame has holes 14 and 15 in the area of its two end sections, using which the side strut can be connected to other components of the base frame. 5

The fastening means 6 is a plastic molded part which is provided with a guide groove 16 for receiving a further, outward-facing and cylindrical extension 17 of the seat or lounger attachment.

FIG. 2 shows a side view of part of the device for fastening the seat or bed attachment of the stroller to the undercarriage of the stroller with the snap fastener open. In FIG. 2, identical parts are provided with the same reference numerals as in FIG. 1, so that a repeated description is omitted in this regard and reference is made to the corresponding explanations for FIG. 1. The differences between the two figures are that when the snap fastener is open, the snap fastener being opened by manually moving the hand lever 10 from the position shown in FIG. 1 in the direction of the arrow x, the hand lever 10 is in the position shown in FIG. 2. Furthermore, the slide arranged in the slide housing 7 has a locking lug 18 which, when the snap fastener is open, is locked into a locking projection 25 of the slide housing and protrudes slightly into the groove 12.

FIG. 3 shows a partial sectional view of the device according to FIG. 1, from which partial sectional view the internal structure of the slide housing and the structure of the slide can be seen. The slide housing 7 shown has a cavity in its interior, in which the slide 19 is slidably mounted. In addition to the components already explained in connection with FIGS. 1 and 2, this slide has in its middle

•5 :*; &udigr;&iacgr;· ··!? J

The slide 19 has two elongated guide grooves 20, 21 in the lower area, which are guided by the fastening screws 2 and 3 or by other transverse guide elements when the slide is moved. The slide 19 is also provided with a receiving bearing 22 for receiving one end of a compression spring 23, the other end of which comes to rest in a further receiving bearing 26, which is provided on the inside of the slide housing. A cylindrical guide bolt 24 attached to the slide housing is provided for guiding the compression spring 23.

When the snap lock is closed, the compression spring 2 3 is in the relaxed state and the slider within the slider housing is in its left end position, with the hand lever 10 in the left end area of the corresponding recess in the slider housing, the locking lug 18 within the slider housing and the locking lug 11 within the groove 12 of the slider housing.

To open the snap lock, the hand lever 10 is moved in the direction of &khgr; until it reaches the right end of the corresponding recess. In this position of the slide, the locking lug 18 is also engaged in a locking projection 2 5 of the slide housing and the compression spring 23 is in the tensioned state. After the hand lever 10 is released, it is initially not possible to relax the compression spring 23 because the locking lug 18 is engaged.

A partial sectional view of the device according to Figure 2, in which the snap lock is in the open state, is shown in Figure 4. From this view it can be seen that the slide is in its right end position within the slide housing when the snap lock is in the open state, that the compression spring is in the tensioned state and that the hand lever 10 is in the right end area of the associated opening.

recess of the slide housing. It can also be seen from Figure 4 that in the open state of the snap lock, the locking lug 11 is retracted into the slide housing and the locking lug 18 extends into the groove 12 of the slide housing and is engaged in the locking projection 25 of the slide housing.

In this open state of the snap lock, the seat or lounger attachment can be easily lifted upwards. The locking lug 18 is pressed out of the locking projection 25. By releasing the locking mechanism, the compression spring 23 can relax. By relaxing the compression spring 23, the slider is moved back into its left end position within the slider housing and is thus prepared for the seat or lounger attachment to be put back on.

When the seat or bed attachment is reattached, the attachment is first pushed into the guide groove 16 of the fastening means 6 using the corresponding, outward-facing extension 17 and then inserted from above into the groove 12 of the slide housing using the extension 13. When this is inserted, the slide is pushed back to the right against the force of the compression spring 23 due to the slanted design of the locking lug 11 until the aforementioned extension 13 comes to rest at the lower end of the groove 12. In this position of the extension 13, the locking lug is no longer pushed back by the extension, so that the compression spring 23 can relax again. This leads to the groove 12 being closed again using the locking lug 11 without any interaction from the user. By closing the groove 12 in this way, the seat or bed attachment is firmly attached to the undercarriage of the stroller. Additional fastening or locking is not necessary either in the area of the snap fastener or in the area of the fastening device 6.

Since the fastening means 6 only has to have a guide groove and does not require any moving parts, the device described can be manufactured inexpensively overall.
5

It should also be noted that the above description only concerns the fastening of the seat or bed attachment on one outside of the stroller, but that such fastening means 5 and 6 are also provided on the other outside of the stroller.

According to the above description, the fastening means 5 and 6 preferably consist of plastic molded parts. However, it is also possible to use molded parts made of other materials.

Furthermore, the invention was described above using the example of a stroller. However, the invention can also be used with other vehicles such as a doll's pram, a children's sports stroller, a buggy, a wheelchair and a wheelchair.

The PIG 5 shows diagrams to illustrate the structure of the snap device. The upper illustration shows the structure of a half-shell of the slide housing and the lower illustration shows the structure of the slide, whereby the meaning of the reference symbols can be derived from the description of Figures 1 to 4. 30

FIG. 6 shows a partial sectional view of a device according to a further embodiment of the invention. This device differs from those described above in the modified design of the fastening means 6' compared to the fastening means 6 described above.

InI

This modified fastening means 6' is a plastic molded part which is provided with a guide groove 16' for receiving the further, outward-facing and cylindrical extension 17 of the seat or reclining attachment. In contrast to the embodiment described above, the fastening means 6' is slidably attached to the side strut 1 of the base frame, with the guide groove 16' being located on the side of the plastic molded part facing away from the snap fastener 5. The slidability is ensured by the fact that the plastic molded part is provided with a cavity in its interior in which a spring 27 is mounted. In the unloaded state, this spring 27 is in the relaxed state and the fastening means 6' is in its right-hand end position.

The seat or reclining attachment can now be attached in an advantageous manner by first inserting the extension 13 into the groove 12 of the snap fastener 5 and locking it in place, and only then inserting the extension 17 into the groove 16'. To insert the extension 17, the fastening means 6' is pressed against the force of the spring 27 in the direction of the arrow y, so that the fastening means 6' approaches the snap fastener 5. Once the extension 17 has been inserted into the groove 16', after the fastening means 6' is released, the force of the relaxing spring pushes the fastening means 6' away from the snap fastener again, whereby the extension 17 comes to rest at the left end of the groove 16' and the attachment is firmly connected to the base frame.

FIG 7 shows a further embodiment of the invention. From this further embodiment it is clear that a snap fastener, as explained in connection with the above figures, is not only used to attach the seat or bed attachment to the base.

It cannot be used instead of a driving device, but can be used universally wherever two parts or objects need to be connected or locked together quickly and easily, whereby this connection or locking can also be removed quickly and easily.

Other possible uses include furniture locks, door locks, trolleys, bicycle baskets and handcarts. Luggage can also be secured in the trunk or cargo area of a vehicle using the snap fastener described.

Another possible use for a stroller is - as shown in Figure 7 - to lock the slider 2 8 against the undercarriage of the stroller. In front of the undercarriage of the stroller, in addition to the side strut 1, Figure 7 also shows additional struts 29 and 30 that run crosswise to one another. A snap device 5 and another receiving element 6 for receiving the seat or reclining attachment are attached to the side strut 1, as already explained in connection with the above figures.

The locking of the slide 28 relative to the base frame is carried out by means of a further snap fastener 5a, which is provided for receiving and locking a laterally protruding extension 31 of the slide 28. The snap fastener 5a corresponds completely in terms of its structure and function to the structure and function of the snap fastener 5 already described above, so that in this context reference is made to the above explanations in order to avoid repetition.

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To unlock the snap lock 5a, the hand lever 10a is moved in the direction of arrow a. This causes the locking lug 11a to be pulled out of the groove 12a of the snap lock 5a and back into the housing 7a. Furthermore, a locking lug 18a (not shown) of the snap lock 5a engages with a locking projection on the housing.

When the slider 28 is folded over the swivel joint 32 in the direction of arrow b, as is useful for space-saving transport of the stroller in the trunk of a vehicle, the extension 31 is moved out of the groove 12a and during this movement the locking lug is released from the locking projection. The force of the relaxing spring causes the slider to return to the position shown in Figure 7, so that the snap fastener is automatically prepared for the next locking or snapping process after it has been unlocked by moving the extension 31 out of the groove 12a.

In FIGS. 8, 9 and 10, another embodiment of a snap fastener is shown, which has essentially the same parts as that in FIGS. 3 to 6, so that in the following only the special features provided in this embodiment are referred to.

As can be seen from the figures, a securing element 33 is additionally provided. This securing element is essentially L-shaped and has a locking projection 35 which extends between the projection provided in a fixed position in the housing with the locking projection 25 and a support wall 37 and is guided displaceably in the slot thus formed. This securing element also has a lower section which reaches through an opening (not shown) in the housing wall and ends protruding from the bottom of the groove 12 or is guided through it. The securing element

element is gripped by a spring 34 which is supported on a support wall in the housing so that the locking projection 35 is always pushed upwards. The locking projection has a sliding surface which runs diagonally from top left to bottom right in order to be able to slide out of a locking groove 3 6 in an extension 3 8 of the locking lug 18 - as can be seen in Figure 8 - when the position shown in Figure 8 is assumed, in which the diagonal sliding surface grips under the locking lug 18. The extension 38 is part of the slide and runs opposite to the locking lug 11. In the embodiment shown, an actuating force is exerted on the hand lever 10 to the left, which enables this position.

The spring 34 causes the extension 38 with the locking lug 25 to enter the groove 12 through an opening gap against a force if no actuating force is exerted on the hand lever 10 to the left. This position is shown in FIG. 9. The opening width of the groove 12 is shortened so that the incoming extension 13, which can be a bolt and is shown in FIG. 10, cannot penetrate. In order to be able to do this anyway, a slight pressure on the hand lever 10 to the left is required so that the path for inserting the extension is then cleared. The relaxed spring 34 is tensioned by the inserted extension 13 - as can be seen in the figure - and pushed out of the locking groove 36. This is not possible in FIG. 9, for example, because the extension 13 does not rest on the bottom of the groove 12. If the slider is now moved to the right - as shown in Figure 10 - from the position shown in Figure 8 with the extension 13 inserted, the slider can be moved to the right by the specified sliding dimension of the extension 3 8. In the example, the sliding dimension is specified by the slotted hole guides. In the end position shown in Figure 10, the spring 24 is tensioned and the locking lug 18 overlaps the

Locking projection 25 so that the slider is held in the position shown, the extension cannot - as the illustration shows - be easily pulled out upwards. The snap connection is opened by the locking lug 11, but the locking lug 18 is nevertheless pushed into the groove so that only by applying increased force when pulling up the stroller insert with the extension 13 is the locking lug 19 lifted off the locking projection 25 and the spring 24 causes a return movement, namely into the position shown in Figure 9, so that with a slight movement of the hand lever 10 to the left the position according to Figure 8 is assumed and the extension 13 can be pulled out of the groove.

When the hand lever 10 is released, the position shown in Figure 9 is essentially resumed, making it difficult to simply insert the extension into the groove. If the extension is in the groove and presses the safety element 33 downwards, the spring 24 causes the locking lug 11 to automatically slide over the extension 13, so that the snap lock is closed again.

Claims (39)

Protection claims 1. Driving device with a chassis which in its upper area has side struts, a seat or lounger attachment, which in its lower area preferably has outward-facing extensions, and a device for fastening the seat or lounger attachment to the base frame, characterized in that the device for fastening the seat or lounger attachment to the base frame has snap fasteners (5) fastened to the side struts (1) of the base frame, which are provided for receiving the extensions (13) of the seat or lounger attachment and each has an actuating element (10) at least for manually releasing the snap fastener connection. 2. Driving device with a base frame which has a seat or reclining attachment or insert and/or interconnected pivoting rod-shaped elements, in particular sliders, bars and/or struts (28, 29, 30), of which at least one element has a laterally protruding extension (31) which is attached to a device on a second element (30), characterized in that the device is a snap closure (5a) which is provided for receiving the extension (31) and has an actuating element (10a) at least for manually releasing the snap connection. 3. Vehicle according to claim 1, characterized in that the device for fastening the seat or bed attachment on the undercarriage on the two side struts (1) of the undercarriage has a snap fastener (5) fastened to the side strut and a further receiving element (6) fastened to the same side strut for receiving a further outwardly directed extension (17) of the seat or lounger attachment. 4. Vehicle according to claim 3, characterized in characterized in that the further receiving element (6, 6 ¹ ) is a molded part having a guide groove (16, 16'). 5. Driving device according to claim 4, characterized in that the further receiving element (6, 6') is a plastic molded part. 6. Driving device according to claim 1, characterized in that the slide housing (7) is provided with a groove (12) which is intended to receive an outwardly directed extension (13) of the seat or reclining attachment. 7. Driving device according to one or more of the preceding claims, characterized in that the snap closure (5, 5a) has a securing element (33) which blocks the actuating element (10, 10a) if the extension (13, 31) is not engaged in the groove (12). 8. Driving device according to one or more of the preceding claims, characterized in that the snap closures (5) each have a slide housing (7) and a slide (19; 10, 11, 18, 20, 21, 22) movable in the slide housing. 9. Vehicle according to claim 7 or 8, characterized in that the slide housing (7) has a recess through which a hand lever (10, 10a) of the slide forming the actuating element is guided outwards. 10. Driving device according to one or more of claims 6 to 9, characterized in that the snap fasteners (5, 5a) are each provided with a spring (22), one end of which comes to rest in a receiving bearing (26) of the slider housing and the other end of which comes to rest in a receiving bearing (22) of the slider. 11. Driving device according to claim 10, characterized in that the slide has a locking nose (11, 11a) which, when the spring (23) is relaxed, closes the groove (12, 12a) in the slide housing while simultaneously slipping over the extension (13, 31). 12. Driving device according to claim 11, characterized in characterized in that the locking lug (11, lla) has a bevel on its upper side, that by inserting an extension (13) of the seat or lounger attachment or on a bar, slide (28) or a strut into the groove (12, 12a) of the slide housing, the locking lug (11, lla) is pressed into the slide housing, whereby the spring (23) is compressed, and that after inserting the extension (13) into the groove (12), the slide is displaced within the slide housing by the spring (23) which relaxes again in such a way that the locking lug (11, lla) closes the groove (12, 12a) in the slide housing. 13. Driving device according to one or more of claims 6 to 12, characterized in that the slide has at least one elongated guide recess (20, 21). 14. Driving device according to one or more of the preceding claims, characterized in that the slide has a further locking lug (18) which, when the snap lock is open, engages a locking projection (25) of the slide housing and thereby prevents the spring (23) from relaxing. 15. A driving device according to claim 14, characterized in that the locking lug (18) is guided upwards within the groove (12) of the slide housing when the seat or bed attachment is removed. (13) is pressed out of the locking projection (25), whereby the slide moves within the slide housing due to the relaxing spring (23) in such a way that the locking lug (11, 11a) closes the groove (12, 12a) in the slide housing.
10 16. Driving device according to one or more of claims 6 to 12, characterized in that the securing element (33) is a sliding element or an L-shaped rotating element with a pivot axis lying in the region of the angle, which securing element (33) at least projects with a part through the bottom of the groove (12) into it and is held therein by the force of a spring (34) until the extension (13, 31) presses down the protruding part, whereby a locking projection (35) of the securing element (33) comes out of engagement with a locking groove (36) on the slide or into an elastic extension of the locking nose (18). 17. Driving device according to claim 16, characterized in that the further locking lug (18) is arranged on the extension (38) of the slider in the opposite direction to the first locking lug (13, 31) and, when the snap connection is open, protrudes in the groove and engages behind the stationary locking projection (25) and is lifted off the locking projection by the extension (13, 31) that can be pulled out of the groove (12, 12a) when the extension (13, 31) is pulled out or by increased restoring force exerted on the hand lever. 18. Driving device according to claim 17, characterized in that the securing element (33) when pulling out the extension (13,31) from the groove with a locking projection (35) into a longer locking groove (36) in the extension engages than the locking projection (35) is wide. 19. Driving device according to one or more of claims 16 to 18, characterized in that the securing element (33) is guided in a longitudinally displaceable manner with a leg (35) between the locking projection (25) and a supporting wall (37) in the housing (7). 20. Driving device according to one or more of claims 16 to 19, characterized in that the locking projection (35) has a sliding surface that runs obliquely from top to bottom relative to the groove (12, 12a), against which the front edge of the locking groove (36) engages and passes under the further locking lug (18) when the spring (24) is relaxed and no extension (13, 31) is inserted into the groove. 21. Driving device according to one or more of the preceding claims 6 to 20, characterized in that the slide housing (7), the slide and the securing element (33) are each plastic molded parts. 22. Driving device according to one or more of the preceding claims 6 to 20, characterized in that the slide housing has two half shells. 23. Driving device according to one or more of the preceding claims 4 to 22, characterized in that the further receiving element (6 ¹ ) is displaceably mounted on the side strut (1). 24. Driving device according to claim 23, characterized in that the further receiving element (6 ¹ ) has a guide groove (16 ') which is located on the side of the further receiving element (6 ¹ ) facing away from the snap closure (5), and that the further receiving element (6 ') can be moved manually in the direction of the snap closure (5). is slidable and is movable in a direction opposite to the snap closure by the force of a relaxing compression spring (17) arranged in its interior.
5 25. Vehicle according to one or more of the preceding claims, characterized in that it is a pram, a doll's pram, a children's sports pram, a buggy, a wheelchair or a wheelchair. 26. Snap closure with ■- a slide housing (7, 7a), - a slide movable in the slide housing (7, 7a) and - a spring (23), one end of which is located in a receiving bearing (26) of the slide housing and the other end of which is located in a receiving bearing (22) of the slide, wherein - the slide housing is provided with a groove (12, 12a) for receiving an extension (13, 31) or bolt to be secured and with a recess through which a hand lever (10, 10a) of the slide is guided outwards, and wherein - the slide has a locking lug (11, 11a) which closes the groove in the slide housing when the spring (24) is relaxed and has a sliding surface on the top side on which the extension (13, 31) or bolt snaps into place when the spring (24) is tensioned and the slide moves back onto the bottom of the groove. 27. Snap fastener according to claim 26, characterized in that it has a securing element (33) which blocks the actuating element (10, 10a) when the extension (13, 31) is not engaged. 28. Snap fastener according to claim 2 6 or 27, characterized in that when the hand lever (10, 10a) is actuated to open the snap fastener, the spring is tensioned and the locking lug (11, 11a) is retracted into the slide housing (7, 7a). 29. Snap fastener according to claim 26, 27 or 28, characterized in that after the insertion of the extension (13, 31) or bolt into the groove (12), the slide is displaced within the slide housing by the spring which relaxes again in such a way that the locking lug (11, 11a) closes the groove (12, 12a) in the slide housing. 30. Snap fastener according to one of claims 26 to 29, characterized in that the slider has a locking lug (18, 13a) which, when the spring is tensioned, locks into a locking projection (25) of the slider housing. 31. Snap fastener according to claim 30, characterized in that the locking lug (18, 18) is pressed over the locking projection when the extension (13, 31) or bolt is removed from the groove (12, 12a). 32. Snap fastener according to one of claims 26 to 31, characterized in that the slider has at least one elongated guide recess (20, 21). 33. Snap fastener according to one or more of claims 27 to 32, characterized in that the securing element (33) is a sliding element or an L-shaped rotary element with a pivoting angle lying in the region of the angle Pivot axis, which securing element (33) protrudes with a part through the bottom of the groove (12) into it at least and is held therein by the force of a spring (34) until the extension (13, 31) presses down the protruding part, whereby a locking projection (35) of the securing element (33) comes out of engagement with a locking groove (36) on the slide or into an elastic extension of the locking nose (18). 34. Snap fastener according to claim 33, characterized in that the further locking lug (18) is arranged on the extension (38) of the slider in the opposite direction to the first locking lug (13, 31) and, when the snap connection is open, protrudes in the groove and engages behind the stationary locking projection (25) and is lifted off the locking projection by the extension (13, Sl) that can be pulled out of the groove (12, 12a) when the extension (13, 31) is pulled out or by increased restoring force exerted on the hand lever. 35. Snap fastener according to claim 34, characterized in that the securing element (33) when the extension (13,31) is pulled out of the groove with a locking projection (35) engages in a longer locking groove (36) in the extension than the locking projection (35) is wide. 36. Snap fastener according to one of claims 34 to 35, characterized in that the securing element (33) with a leg (35) between locking projection (25) and a supporting wall (37) in the housing (7) is guided longitudinally displaceably. 37. Snap fastener according to one or more of claims 34 to 36, characterized in that the locking projection (35) has a sliding surface that runs obliquely from top to bottom relative to the groove (12, 12a), which grips the front edge of the locking groove (3 6) and passes under the further locking lug (18) when the spring (24) is relaxed and no extension (13, 31) is inserted into the groove.
5 38. Snap fastener according to one of claims 26 to 3£, characterized in that the slide housing, the slide and the securing element (33) are each plastic molded parts. 39. Snap closure according to one of claims 26 to 35, characterized in that the slide housing has two half shells.