CZ374799A3 - Slide-in clamp for hidden fastening of door lock casing - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding clamp for concealed fastening of a cylindrical door lock housing in a motor vehicle body sheet metal opening. For this purpose, the housing is provided with a contact flange on the leading side and an annular extension at the opposite end of the outer wall, and furthermore has at least two radially outwardly projecting outwardly projecting projections which have corresponding recesses for receiving in the rotatable opening. the protrusions engage when inserted into the door lock.

BACKGROUND OF THE INVENTION

According to current practice, such door locks are introduced from the outside into the receiving opening until the flange is seated. The forked spring steel clamp is then slid from the inside of the door transversely to the groove wall of the lock body, which is firmly clamped. This method of fitting the lock is very labor intensive and can only be done manually while the inner wall of the door is still free.

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SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the invention to avoid these difficult work and to provide a fastening clamp with respect to the shape of the lock body and the receiving opening so that the lock body together with the pre-mounted fastening clamp can be retracted externally into the receiving opening and concealed.

In order to solve this problem, a so-called push-in clamp is provided which has a support ring interrupted by a transverse slot, on whose edge facing the housing flange four support arms are formed, supported along the outer wall of the housing. The support arms have, at their free ends, inclined outwardly extending support tongues, and centering protrusions extending approximately parallel to the axis between them, which abut the edge of the receiving opening in the installed state. In order to reliably engage behind the rear side of the body sheet, the support tongues have a distance from the support-forming annular surface of the flange, which is equal to the thickness of the body sheet, after the support ring has snapped.

The support ring interrupted by the slot is shaped such that it expands somewhat resiliently when pushed onto the lock sleeve to overcome the annular extension, and then engages resiliently on the outer wall after engagement with the extension.

To increase the outwardly acting resilient force of the support tongues, the support legs according to a further embodiment of the invention are bent inwardly above the centering projections and, in the installed state, resiliently abut the edges of the bend on the outer wall of the housing.

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BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of the invention is illustrated in the drawings and will be explained in more detail below. In the drawings, they represent

giant. 1 retractable clamp in front view, giant. 2 retractable clamp in side view, giant. 3 retractable clamp in plan, giant. 4 door lock case in side view push-in clamps, before slipping giant. 5 housing of the castle door with sliding retractable

Fig. 6 shows a receiving opening in plan view and Fig. 7 a door lock housing locked in the receiving opening by means of a sliding clamp.

DETAILED DESCRIPTION OF THE INVENTION

The plug clamp 1 shown in FIGS. 1 to 3 serves, for example, in the case of motor vehicle doors for concealed fixing of the door lock housing 2 in the opening 3 of the door plate 4 (FIG. 6).

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The door lock housing 2 is generally cylindrical for receiving a door lock (not shown) and is provided with a contact flange 5 on the leading side. At the opposite end there is an annular extension na on the outer wall 6 of the housing g. In addition, on this outer wall there are radially outwardly extending protrusions θ. and 9, which start at a distance above the annular extension 7, from there first they taper and then extend as axial walls up to a short distance to the flange 5.

Between the projections 8 and 9, two other projections 11 formed on the outer wall 6 directly on the flange 5 are rotated by 90 °, these projections 11 having a rectangular cross-section near the flange and the side walls of the projections converge pyramidal. In the extension of these projections 11, two latching noses 12 are formed close to the annular extension 7 on the outer wall 6, whose latching surfaces 13 face the flange 5 and whose outer diameter is somewhat larger than the outer diameter of the annular extension 7.

The aforementioned protrusions and 9 are given by the space requirement of a door lock (not shown) and are of different width in the present embodiment. Two correspondingly different recesses 14 and 15 are provided in the opening 2 of the door plate 4.

Through the interaction of the differently wide recesses 14 and 15 with the protrusions 8 and 9, it is ensured that the door lock housing 2 remains in the correct position during insertion. For further projections 11, a corresponding recess 16 is provided in the receiving opening 3, which serves to secure the door lock housing 2 in the opening 2 against rotation.

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The male clamp 1 consists essentially of a support ring 17 which is interrupted by a transverse slot 18 and resiliently clamped by a yoke 19, given the shape of the housing. At the edge 20 of the support ring 17 facing the abutment flange 5, four support arms 21 are shaped so that they abut against the outer wall 6 of the door lock housing 2 in the installed state.

The support arms 21 have, at their free ends, inclined outwardly extending support tabs 22 and centering projections 23 extending therebetween approximately parallel to the axis, which serve to abut the edges 24 of the receiving opening 3, which remain between the recesses 14, 15 and 16. the support tongues 22 beyond the edges 24 of the receiving aperture 3, it is important that these support tongues 22 have a distance from the abutment fitting surfaces 25 of the flange 5 after pressing the sliding clamp 1 onto the door lock housing 2 and engaging the support ring 17 by the annular extension 7, which is at least equal to the thickness d of the door sheet 4.

Since the annular extension 7 only raises relatively little above the outer wall 6, both opposing latching noses 12 are provided which cooperate with respective rectangular recesses 27 in the support ring 17 so that, when the push-in clamp is pressed, it simultaneously engages when the support ring 17 engages the annular ring. extension 7.

At a distance A from the end of the centering lugs 23, the support arms 21 are bent somewhat inwardly, such that the bent edges 26 in the installed state of the sliding clamp 1 resiliently abut against the outer wall 6 of the door lock housing 2. This ensures that the centering lugs 23 are strongly pushed outwards and the support tabs 22 are reliably introduced over the edge 24 of the receiving opening 3, which is important to the

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4 and 5, as shown in FIGS. 4 and 5, the support arms 22 can be pushed forward in the direction of the arrow M1 in the door lock housing 2 so that the support arms 22 are inserted around the projections 8 and 9 to the flange 5 until the front edges of the centering projections 23 come into contact with the abutment surface 25 of the flange 5. The support ring 17 expands somewhat flexibly until it overcomes the annular extension a and the latching noses 12 snap into the rectangular recesses 27 with their latching surfaces 13.

Installation of the door lock into the door panel 2 is carried out, as shown in FIG. 5, in the direction of the arrow M2 by the support ring 22 forward through the opening 3, and is terminated when the flange 5 engages the door panel 4 and the support tongues 22 simultaneously engage the rear side of the opening edge 24.

In order to be able to remove the door lock if necessary, on the support ring 17, on both sides of the transverse slot 18, the outwardly curved removal lugs 28 are formed. The inner door lining must first be removed for removal. Then, the two lugs 28 can be pushed together by a suitable tool, so that the support ring is lifted from the latching noses 12 and the door lock housing 2 with an annular extension může can be pulled out of the plug clamp 1 while remaining in the receiving opening 3.

After removal of the housing 2, the push-in clamp 1 can be pulled in and reused.

Claims (5)

a leading side and an annular extension (7) at the opposite end of the outer wall (6), and further comprising radially outwardly extending protrusions (11) projecting radially outward from the outer wall (6), which for receiving in the opening (3) of the door panel (4); secured against rotation, they fit into corresponding recesses (16) of the receiving opening (3), characterized in that the insertion clamp (1) has a resiliently abutting, annular extension (7) engaging a transverse slot (18) on the outside (6). an interrupted support ring (17), on the edge (20) of which faces the flange (5), are formed several support arms (21) abutting along the outer wall (6) of the door lock housing (2), the support arms (21) having in each case at their free ends, two oblique outwardly extending support tongues (22), and centering projections (23) extending between the support tongues (22) parallel to the axis for bearing engagement on the edge (24) of the receiving opening (3). Plug-in clamp according to claim 1, characterized in that the support tongues (22) have a distance (a) from the support-forming contact surfaces (25) of the flange (5) after the support ring (17) engages the annular extension (7). equal to the thickness (d) of the door panel (4). Plug clamp according to claim 1 or 2, characterized in that the support arms (21) are bent at a distance (A) from the end of the centering projections (23). 16 78663 (78663a.doc) • 0 · 000 · 0000 0 0 * 0 · · 0 0000 · 0 0 0 0 0 0 0 The bending edges (26) resiliently abut against the outer wall (6) of the door lock housing (2), resiliently and in the installed state. Plug-in clamp according to one of Claims 1 to 3, characterized in that, in the extension of the projections (11), two latching noses (12) are formed close to the annular extension (7) on the outer wall (6) which, when pressed into the plug-in clamp. (1) engages in respective recesses (27) in the support ring (17). Plug-in clamp according to one of Claims 1 to 4, characterized in that on the support ring (17) on both sides of the transverse slot (18), outwardly bent disassembly projections (28) are formed.