JP2007039973A - Back door lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a back door lock device which eliminates wobbling between an upper plate and a latch base, caused by vibrations. <P>SOLUTION: According to the structure of the back door lock device, the upper plate 5 has folded pieces 22, 23 which are folded downward at both lateral edges of the upper plate, and the latch base 4 has fitting holes 18, 19 which are formed in both lateral ends of an upper surface of the latch base. Then both the folded pieces 22, 23 of the upper plate 5 are fitted into the respective fitting holes 18, 19 formed in the latch base 4 from above, and therefore the upper plate 5 and the latch base 4 are positioned to each other in a horizontally immovable manner. Then the upper plate 5, the latch base 4, and a housing 3 are assembled by caulking shafts 31, 32 inserted into the upper plate 5, the latch base 4, and the housing 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a back door lock device suitable for locking a back door, a trunk lid and the like of an automobile in a closed state.

  As a device that locks the back door of an automobile in a closed state, there is a door lock device that includes a striker fixed to the lower side of the opening of the vehicle body, and a main body mechanism having a latch, a detent lever, and an open lever attached to the back door. It is known (see Patent Document 1). In such a door lock device, when the door is closed and the striker collides with the open latch, the latch rotates with the impact engaged with the striker, and the door is pulled toward the opening of the vehicle body. Then, the detent lever engages with the latch in the closed state to restrict the reverse rotation of the latch, and the door is locked in the closed state. On the other hand, when the open lever is turned, the detent lever is pulled away from the latch. As a result, the latch is reversely rotated to be in the open state, and the engagement between the latch and the striker is released, so that the door can be opened.

  By the way, the main body mechanism is disposed between the cover fixed to the door, the latch base housed in the cover, one surface of the latch base and the cover, and is engaged with the striker by rotating to the closed position. The latch to be joined, the upper plate provided on the other surface of the latch base, and the upper plate are rotatably attached to the upper plate so that the latch is rotated in a direction to release the engagement with the striker. Between the open lever, one side of the latch base, and the cover, the latch is prevented from reversing from the closed position, and by rotating the open lever, the latch is turned in the release direction to release the restriction on the latch. A plurality of protrusions that contact the upper plate on the other surface of the latch base at appropriate intervals, and a cover, a latch, The Tchibesu and upper plate assembled by a first shaft, and a cover, the detent lever, which the latch base and the upper plate is assembled by a second shaft has been known (e.g., refer to Patent Document 1 or Patent Document 2).

  In the thing of the said patent document 1, the lower end of a 1st shaft and the lower end of a 2nd shaft are each penetrated to the through-hole provided in the cover, and are fixed by the one crimping structure by a crimping stop. Moreover, the thing of the said patent document 2 is fixing by the shaft both caulking structure which crimps the upper and lower ends of a 1st shaft, and the upper and lower ends of a 2nd shaft, respectively.

JP 2005-54525 A JP 2002-235475 A

  However, in the above-described conventional main body mechanism, the upper plate and the latch base are fixed only by the caulking structure with the two shafts of the first shaft and the second shaft.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a back door lock device capable of eliminating the backlash between the upper plate and the latch base caused by vibration.

  A back door lock device according to a first aspect includes a striker fixed to a vehicle body and a main body mechanism attached to the back door, and the main body mechanism includes a housing fixed to the back door, and the housing. A first shaft and a second shaft, each of which is provided with a stored latch base and an upper plate disposed on an upper surface of the latch base, and are inserted through the upper plate, the latch base, and the housing, respectively, are caulked. In order to solve the above-described problem, a bent piece bent downward is provided on both sides of the upper plate and formed on both sides of the upper surface of the latch base. The bent pieces of the upper plate are inserted into the insertion holes from above, respectively, and the upper plate and the rack are inserted. Characterized in that the immovable position the base in a horizontal direction.

  According to the back door lock device of the first aspect, the bent pieces that are bent downward are provided on both sides of the upper plate, respectively, and the fitting holes are provided on both sides of the upper surface of the latch base. The two bent pieces are inserted into the fitting holes of the latch base from above so that the upper plate and the latch base are positioned so as not to move horizontally with respect to each other. Since the first shaft and the second shaft that are inserted through each other are assembled by being caulked, the upper plate and the latch base do not rattle due to vibration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a back door lock device according to an embodiment of the present invention. The back door lock device includes a main body mechanism 1 mounted on a back door (not shown) pivotally attached to a rear portion of the vehicle body so as to be opened and closed in a vertical direction, and a striker 2 fixed to the vehicle body (not shown). Become. The striker 2 is formed by bending a metal rod into a substantially U shape and protruding upward.

  2 is a front perspective view of the main body mechanism 1 viewed from the front of the vehicle body (not shown), and FIG. 3 is a rear perspective view of the main body mechanism 1 viewed from the rear of the vehicle body. The main body mechanism 1 includes a housing 3 fixed to the lower end of the back door, a latch base 4 housed and fixed inside the housing 3, an upper plate 5 attached to the upper surface of the latch base 4, and an upper plate 5 And an attached drive unit 6. The drive unit 6 rotates the pressing lever 7 (see FIG. 3) electrically or manually. However, the drive unit 6 is not directly related to the gist of the present invention, and thus will not be described below. Further, the detent lever 8 (see FIG. 3) is rotated in the latch releasing direction by the rotation of the pressing lever 7, but has a conventionally well-known configuration and is not directly related to the gist of the present invention. Therefore, it is omitted in the following description.

  FIG. 4 is a cross-sectional view showing a main part of the main body mechanism 1 with the drive unit 6 removed, broken in the left-right direction. The housing 3 is made of metal, and has a box-shaped recess 10 at the center, and a flange portion 11 protruding from the left and right sides at the upper portion of the recess 10, and a bolt (not shown) inserted into the flange portion 11. ) And the outer surface of the recess 10 is exposed on the lower surface of the back door (see FIG. 2). In the recess 10 of the housing 3, a striker entrance 12 is formed by a notch extending from the center of the front side surface of the recess 10 to the center of the bottom surface of the recess 10 in accordance with the approach direction of the striker 2. Further, as shown in FIG. 4, through holes 13 and 14 are formed on the bottom surface of the recess 10 on the left and right sides of the striker entrance 12, respectively.

  FIG. 5 is a perspective view showing the latch base 4 and the upper plate 5, and FIG. 6 is a perspective view for explaining attachment of the upper plate 5 to the latch base 4. The latch base 4 is made of synthetic resin and has a substantially rectangular parallelepiped shape as shown in FIGS. 5 and 6 and is housed and fixed in the recess 10 of the housing 3 (see FIG. 4). The dimension of the latch base 4 in the left-right direction is slightly smaller than the dimension in the left-right direction of the recess 10 of the housing 3.

  Further, as shown in FIG. 5, a striker receiving recess 15 is formed on the lower surface of the latch base 4 at a position coincident with the striker advance entrance 12 of the housing 3. Further, shaft insertion holes 16 and 17 penetrating the latch base 4 in the vertical direction are formed at positions corresponding to the through holes 13 and 14 provided in the housing 3 (see FIG. 6). Furthermore, rectangular fitting holes 18 and 19 are provided in the center of the left and right sides of the top surface of the latch base 4 (see FIG. 6).

  The upper plate 5 is formed by bending a metal plate, and as shown in FIGS. 5 and 6, the fixing piece 20 fixed to the upper surface of the latch base 4, and bent upward substantially from one end (rear end) of the fixing piece 20. And a bent upright piece 21. The fixing pieces 20 of the upper plate 5 are provided with through holes 24 and 25 at positions corresponding to the shaft insertion holes 16 and 17 provided in the latch base 4 (see FIG. 6). Further, the left and right side edges of the fixed piece 20 are provided with bent pieces 22 and 23 bent downward at positions corresponding to the fitting holes 18 and 19 provided in the latch base 4, respectively. .

  In addition, although the standing piece 21 of the upper plate 5 is not directly related to this invention, the outline is demonstrated. The upright piece 21 of the upper plate 5 has a U-shaped support portion 26 opened upward on the left side, a tap hole 27 on the upper end portion, a tap hole 28 on the right side, and openings 29 and 30 on the center and on the upper side. Each is provided (see FIG. 5). The drive unit 6 is attached to the front surface of the upright piece 21 by screws using the support portion 26 and the tap holes 27 and 28 (see FIG. 2). Further, the pressing lever 7 provided in the drive unit 6 is exposed to the rear surface of the standing piece 21 through the opening 29, and is disposed at a position facing the detent lever 8 on the right side in the rear view (FIG. 3). reference).

  Next, assembly of the upper plate 5, the latch base 4, and the housing 3 will be described. The fixed piece 20 of the upper plate 5 is placed on the upper surface of the latch base 4. In other words, the bent pieces 22 and 23 provided on the left and right sides of the upper plate 5 are respectively inserted into the fitting holes 18 and 19 provided on the left and right sides of the latch base 4 from above, so that the upper plate 5 and the latch base 4 are horizontal to each other. It is positioned so as not to move in the direction (front-rear direction and left-right direction) (see FIGS. 5, 6, and 4).

  Next, the first coupling pin 31 (first shaft) is inserted from above through the through hole 24 of the fixed piece 20, the shaft insertion hole 16 of the latch base 4, and the through hole 13 of the housing 3. Similarly, the second coupling pin 32 (second shaft) is inserted from above into the through hole 25 of the fixing piece 20, the shaft insertion hole 17 of the latch base 4, and the through hole 14 of the housing 3. Finally, the lower end of the first coupling pin 31 and the lower end of the second coupling pin 32 are caulked against the outside of the bottom surface of the housing 3. That is, the lower end of the first shaft and the lower end of the second shaft are respectively inserted into through holes 13 and 14 provided in the housing 3 and fixed in a one-side caulking structure by caulking, and the upper plate 5, the latch base 4 and the housing 3 are assembled together.

  As is clear from the above description, the bent pieces 22 and 23 of the fixed piece 20 of the upper plate 5 are respectively fitted into the fitting holes 18 and 19 of the latch base 4 from above, so that the upper plate 5 and the latch base 4 Are positioned so that they cannot move in the horizontal direction, so that the upper plate 5 and the latch base 4 are positioned without shaking in the horizontal direction. On top of that, the first shaft (first coupling pin 31) and the second shaft (second coupling pin 32) inserted through the upper plate 5, the latch base 4 and the housing 3, respectively, are crimped. Since it is the structure assembled | attached by (4), it couple | bonds without shaking with respect to an up-down direction. Therefore, it is fixed without rattling in the horizontal and vertical directions. Therefore, the upper plate 5 and the latch base 4 do not rattle due to vibration.

  The latch base 4 includes a latch that engages with the striker by rotating to the close position, a spring that urges the latch in the open direction, and the latch is restricted from reversing from the close position. By rotating the lever, there are provided various members such as a locking claw member of the detent lever 8 that rotates in the releasing direction to release the restriction on the latch, and a spring that biases in the direction approaching the outer peripheral surface of the latch. However, these members are not the gist of the present invention, and the arrangement configuration and operation of these members are well-known techniques. For example, JP-A-2005-54525 and JP-A-2005-105587. The description is omitted because it is disclosed in the publication.

It is a perspective view of the back door lock device concerning the embodiment of the present invention. FIG. 3 is a front perspective view of the main body mechanism as viewed from the front of the vehicle body. FIG. 4 is a rear perspective view of the main body mechanism as viewed from the rear of the vehicle body. It is sectional drawing which fractures | ruptures and shows the principal part of the main body mechanism from which the drive unit was removed. It is a perspective view which shows a latch base and an upper plate. It is a perspective view for demonstrating attachment of the upper plate with respect to a latch base.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body mechanism 2 Striker 3 Housing 4 Latch base 5 Upper plate 6 Drive unit 7 Pressing lever 8 Detent lever 10 Recessed part 11 Flange part 12 Striker entrance 13 Through hole 14 Through hole 15 Striker receiving recessed part 16 Shaft insertion hole 17 Shaft insertion hole 18 Insertion hole 19 Insertion hole 20 Fixed piece 21 Standing piece 22 Bending piece 23 Bending piece 24 Through hole 25 Through hole 26 Support part 27 Tap hole 28 Tap hole 29 Opening part 30 Opening part 31 First coupling pin (first coupling pin) shaft)
32 Second coupling pin (second shaft)

Claims (1)

A striker fixed to the vehicle body, and a main body mechanism attached to the back door. The main body mechanism includes a housing fixed to the back door, a latch base housed in the housing, and a latch base A back door lock comprising: an upper plate disposed on an upper surface; and a first shaft and a second shaft that are inserted through the upper plate, the latch base, and the housing, respectively, and are assembled by caulking In the apparatus, bent pieces bent downward are provided on both sides of the upper plate, and both bent pieces of the upper plate are inserted from above into fitting holes formed on both sides of the upper surface of the latch base. The upper plate and the latch base are positioned so that they cannot move horizontally with respect to each other. Back door locking device, characterized in that was.

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