JP2023119165A - back door lock structure - Google Patents

Abstract

To provide a back door lock structure capable of suppressing disengagement of a lock and a striker in the event of a vehicle rear-end collision.SOLUTION: A back door lock structure 10 includes: a striker 20 installed on one of an opening 3 and a back door 1; a lock 30 mounted on a mounting surface 6 provided on the other of the opening 3 and the back door 1; and a metal cover member 40 covering the lock 30. The lock 30 has a striker insertion port 31 into which the striker 20 is inserted, a front part 32 extending parallel to an insertion direction D of the striker 20 into the striker insertion port 31, and a pair of side parts 35, 35 extending respectively from both ends of the front part 32 toward the mounting surface 6 in a direction parallel to the front part 32 and orthogonal to the insertion direction D. The cover member 40 has a cover-side front part 41 that closely opposes the front part 32, and a pair of cover-side side portions 42, 42 closely opposed to the pair of side portions 35, 35, respectively.SELECTED DRAWING: Figure 4

Description

The present invention relates to a back door lock structure.

Conventionally, a back comprising a striker provided at one of the opening of the vehicle body and the back door, and a lock provided at the other of the opening of the vehicle body and the back door and engaged with the striker when the back door is closed. A door structure is known (for example, Patent Document 1).

Patent Literature 1 discloses a back door lock cover attachment structure in which the lock cover is attached so as to be attached to a lock body fixed to a predetermined portion of the back door. In Patent Document 1, the lock body is fixed to the door panel with a plurality of bolts, and the lock cover is attached to the lock body by engaging the lock cover with the head portion of each bolt.

Japanese Patent Application Laid-Open No. 2001-171353

However, since the lock cover of Patent Document 1 is made of a plastic material, the lock cover does not have the function of suppressing deformation of the lock. Therefore, when a load is applied to the engaging portion between the lock and the striker at the time of a rear-end collision of the vehicle, the lock deforms and the engagement between the lock and the striker can be released.

SUMMARY OF THE INVENTION An object of the present invention is to provide a back door lock structure capable of suppressing disengagement between the lock and the striker in the event of a vehicle rear-end collision. That is.

A back door lock structure according to one aspect of the present invention includes a striker provided on one of an opening of a vehicle body and a back door, a lock provided on the other of the opening and the back door, and a metal structure covering the lock. and a cover member. The cover member has a cover-side front portion closely opposed to the front portion of the lock and a pair of cover-side side portions closely opposed to the pair of side portions of the lock.

Advantageous Effects of Invention According to the present invention, it is possible to provide a back door lock structure capable of suppressing disengagement of the lock and the striker in the event of a rear-end collision of the vehicle.

FIG. 1 is a schematic perspective view showing a rear portion of a vehicle to which a back door lock structure according to one embodiment is applied. 2 is a schematic side cross-sectional view of the rear part of the vehicle shown in FIG. 1. FIG. FIG. 3 is a schematic perspective view of the back door lock structure provided in the opening of the vehicle body. 4 is a schematic exploded perspective view of the back door lock structure shown in FIG. 3. FIG.

Embodiments will be described with reference to the drawings. In the description of the drawings, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

[Configuration of back door lock structure]
The configuration of a back door lock structure 10 according to this embodiment will be described with reference to FIGS. 1 to 4. FIG. In the drawings, FR indicates the front side of the vehicle, RR indicates the rear side of the vehicle, RH indicates the right side in the vehicle width direction, and LH indicates the left side in the vehicle width direction.

As shown in FIGS. 1 to 4, the back door lock structure 10 includes a back door 1, a vehicle body 2, a striker 20, a lock 30, and a cover member .

The back door 1 is attached to the vehicle body 2 so as to be openable and closable with respect to the opening 3 of the vehicle body 2 with a hinge portion (not shown) provided at the front end portion as a rotation center. The back door 1 has an outer panel 1a and an inner panel 1b to form a closed cross section.

A reinforcing panel 4 is arranged between the outer panel 1a and the inner panel 1b of the back door 1. As shown in FIG. The reinforcement panel 4 has an upper panel 4a and a lower panel 4b to form a closed cross section.

A rear end cross member 5 forming part of the opening 3 of the vehicle body 2 is arranged at the rear portion of the vehicle body 2 . The rear end cross member 5 has an outer panel 5a and an inner panel 5b to form a closed cross section. A lock plate 7 having a mounting surface 6 for mounting a lock 30 is attached to the front side surface of the rear end cross member 5 using bolts 51 and nuts 52 .

A base plate 21 of the striker 20 is attached to the back door 1 using bolts 53 and nuts 54 .

The lock 30 is attached to the mounting surface 6 provided in the opening 3 of the vehicle body 2 using a bolt 55 and a nut 56, and engages with the striker 20 when the back door 1 is closed.

The lock 30 has a striker insertion opening 31 into which the striker 20 is inserted, and a front surface portion 32 extending parallel to an insertion direction D (see FIG. 2) of the striker 20 into the striker insertion opening 31 . The striker insertion opening 31 is formed in a shape that opens in the left-right direction toward the insertion entrance side (upward). A latch member 33 is held on the front face portion 32 by holding portions 34 , 34 .

Further, the lock 30 has a pair of side portions 35 extending from both ends (right and left ends) of the front portion 32 in a direction parallel to the front portion 32 and orthogonal to the insertion direction D of the striker 20 toward the mounting surface 6. , 35.

The cover member 40 is made of a metal material such as a ferrous material, and is fixed to the mounting surface 6 so as to cover the lock 30 . The cover member 40 has a cover-side front surface portion 41 closely facing the front surface portion 32, and a pair of cover-side side surface portions 42, 42 closely facing the pair of side surface portions 35, 35, respectively. The cover-side front portion 41 is provided with a bead 43 extending along a direction (horizontal direction) perpendicular to the insertion direction D of the striker 20 .

The cover member 40 also has a mounting surface portion 44 that extends along the mounting surface 6 from the end portion (rear side end portion) of the pair of cover-side side surface portions 42 , 42 on the mounting surface 6 side. The cover member 40 is fastened to the mounting surface 6 using a bolt 57 and a nut 58 at a portion (upper portion) of the mounting surface portion 44 on the upstream side in the insertion direction D of the striker 20 . Also, the cover member 40 is fastened together with the lock 30 to the mounting surface 6 at the intermediate portion of the mounting surface portion 44 .

Further, the pair of cover-side side surface portions 42 , 42 are connected to each other by a connecting portion 45 at a portion (upper portion) on the upstream side in the insertion direction D of the striker insertion opening 31 .

In this embodiment, of the striker 20 and the lock 30 that can be engaged with each other, the striker 20 is provided on the back door 1 and the lock 30 is provided on the opening 3 of the vehicle body 2 . Alternatively, however, the striker 20 may be provided in the opening 3 of the vehicle body 2 and the lock 30 may be provided in the back door 1 .

[Effects, etc.]
The effects of this embodiment will be described below.

(1) The back door lock structure 10 includes a back door 1 attached to the vehicle body 2 so as to be openable and closable with respect to the opening 3 of the vehicle body 2, and a striker 20 provided at one of the opening 3 and the back door 1. Prepare. The back door lock structure 10 also includes a lock 30 attached to a mounting surface 6 provided on the other of the opening 3 and the back door 1 and engaged with the striker 20 when the back door 1 is closed. Furthermore, the back door lock structure 10 includes a cover member 40 made of a metal material and fixed to the mounting surface 6 so as to cover the lock 30 . The lock 30 has a striker insertion opening 31 into which the striker 20 is inserted, and a front surface portion 32 extending parallel to the direction D in which the striker 20 is inserted into the striker insertion opening 31 . The lock 30 also has a pair of side portions 35 extending from both ends of the front portion 32 in a direction parallel to the front portion 32 and orthogonal to the insertion direction D toward the mounting surface 6 . The cover member 40 has a cover-side front surface portion 41 closely facing the front surface portion 32, and a pair of cover-side side surface portions 42, 42 closely facing the pair of side surface portions 35, 35, respectively.

In this embodiment, a metal cover member 40 is attached to the attachment surface 6 so as to cover the lock 30 . The cover member 40 has a cover-side front surface portion 41 closely facing the front surface portion 32 of the lock 30 and cover-side side surface portions 42 closely facing the pair of side surface portions 35 of the lock 30, respectively. Therefore, when a load is applied to the engagement portion between the lock 30 and the striker 20 in the event of a rear-end collision of the vehicle, and the lock 30 attempts to deform (open) in the left-right direction, the deformation of the lock 30 may cause the cover member 40 to open. It is restrained by the cover-side side surface portion 42 . Further, when a load is applied to the engagement portion between the lock 30 and the striker 20 in the event of a rear-end collision of the vehicle, and the front portion 32 of the lock 30 attempts to deform so as to protrude forward, the deformation of the lock 30 is It is restrained by the cover-side front surface portion 41 of the cover member 40 . Therefore, deformation of the lock 30 due to a rear-end collision of the vehicle is suppressed by the cover member 40, and it is possible to suppress the opening of the back door 1 due to disengagement of the lock 30 and the striker 20.例文帳に追加

(2) A bead 43 extending in a direction orthogonal to the insertion direction D is provided on the cover-side front surface portion 41 .

By providing the bead 43 on the cover-side front surface portion 41 of the cover member 40, the rigidity of the cover-side front surface portion 41 can be increased, and in particular, deformation of the lock 30 toward the front side is suppressed by the cover-side front surface portion 41 of the cover member 40. becomes possible.

(3) The cover member 40 has a mounting surface portion 44 extending along the mounting surface 6 from the ends of the pair of cover-side side surface portions 42, 42 on the mounting surface 6 side. A portion of the surface portion 44 on the upstream side in the insertion direction D is fastened to the mounting surface 6 .

By fastening the upper portion of the mounting surface portion 44 of the cover member 40 to the mounting surface 6, the rigidity of the mounting surface portion 44 can be increased, and the rigidity of the cover-side side surface portion 42 can be increased. Therefore, deformation of the lock 30 particularly in the left-right direction can be suppressed by the cover-side side surface portion 42 of the cover member 40 .

(4) The pair of cover-side side portions 42 and 42 are connected to each other on the upstream side in the insertion direction D of the striker insertion opening 31 .

By connecting the pair of cover-side side portions 42, 42 to each other in the left-right direction of the cover member 40, the rigidity of the cover-side side portion 42 can be increased. Therefore, deformation of the lock 30 particularly in the left-right direction can be suppressed by the cover-side side surface portion 42 of the cover member 40 .

While embodiments of the present invention have been described above, the discussion and drawings forming part of this disclosure should not be construed as limiting the invention. Various alternative embodiments, implementations and operational techniques will become apparent to those skilled in the art from this disclosure.

1 back door 2 vehicle body 3 opening 6 mounting surface 10 back door lock structure 20 striker 30 lock 31 striker insertion opening 32 front surface 35 side surface 40 cover member 41 cover side front surface 42 cover side side surface 43 bead 44 mounting surface D striker direction of insertion

Claims (4)

a back door attached to the vehicle body so as to be openable and closable with respect to an opening of the vehicle body;
a striker provided at one of the opening and the back door;
a lock attached to a mounting surface provided on the other of the opening and the back door and engaging with the striker when the back door is closed;
a cover member made of a metal material and fixed to the mounting surface so as to cover the lock;
The lock is
a striker insertion opening into which the striker is inserted;
a front portion extending parallel to the direction of insertion of the striker into the striker insertion port;
a pair of side surface portions extending from both ends of the front surface portion in a direction parallel to the front surface portion and perpendicular to the insertion direction toward the mounting surface;
The cover member is
a cover-side front surface facing the front surface in close proximity;
a pair of cover-side side portions that closely face the pair of side portions, respectively;
Back door lock structure. A bead extending along a direction orthogonal to the insertion direction is provided on the cover-side front surface,
The back door lock structure according to claim 1. The cover member has a mounting surface portion extending along the mounting surface from an end portion of the pair of cover-side side surface portions on the mounting surface side,
The cover member is fastened to the mounting surface at a portion of the mounting surface portion on the upstream side in the insertion direction,
The back door lock structure according to claim 1 or 2. The pair of cover-side side surface portions are connected to each other on the upstream side of the striker insertion port in the insertion direction,
The back door lock structure according to any one of claims 1 to 3.

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