JP2012092598A - Door lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensively and simply constituted door lock device excellent in load bearing property in a direction different from a normal door opening/closing direction.SOLUTION: A door lock device, which is equipped with a base plate fixed to a door or a vehicle body, holds or releases a striker via a hook which is turnably supported by the base plate. A developed length extension wall portion, which normally assumes a bent shape and which is deformed into a developed shape depending on input of a load, in a direction crossing a support portion, into the support portion in the state of holding the striker by the hook so as to permit relative displacement of the support portion with respect to a fixed portion, is formed between the portion, which is fixed to the door or the vehicle body, of the base plate and the support portion for turnably supporting the hook.

Description

  The present invention relates to a door lock device that locks and unlocks a door provided on a vehicle.

  The vehicle door lock device includes a striker on one of the vehicle main body side and the door side, and on the other side, a hook (latch) that can be engaged with the striker, and a ratchet (pole) that restricts the rotation of the hook. Many types are used. In this type of door lock device, when the hook that engages with the striker is rotated to the striker holding position (in the striker retracting direction) when the door is closed, the ratchet engages with the hook and hooks in the striker releasing direction. Is restricted and the locked state is established. When opening the door, if the ratchet is rotated in the direction of disengagement (unlatching) from the hook, the striker can be released by the hook and the door can be opened.

JP 2010-31521 A

  The door lock device as described above is required to maintain a stable strength even when a load is applied in a direction different from the normal door opening / closing direction (the striker engagement / disengagement direction with respect to the hook). Specifically, when a load in the direction along the rotation axis of the hook or ratchet is applied in a locked state where the hook holds the striker, the load is received by the base plate supporting the hook or ratchet. If the base plate is made thick so as to give strength to withstand this load, the manufacturing cost increases and the weight also increases.

  An object of the present invention is to provide a door lock device that can maintain a stable strength against a load in a direction different from a normal door opening / closing direction with a low-cost and simple configuration.

  The present invention includes a base plate fixed to one of the door and the vehicle main body, and holds the striker fixed to the other of the door and the vehicle main body by a hook that is rotatably supported by the base plate. In a door lock device that allows the door to be opened by releasing the striker holding by the hook, and holding the hook in a closed state, between the base plate fixing part to the door or the vehicle body and the support part that rotatably supports the hook In addition, the unfolded length is normally formed in a bent shape and is deformed in response to a load input in a direction intersecting the support portion with respect to the support portion in a state where the striker is held by a hook, and allows the support portion to move relative to the fixed portion. It is characterized by forming an extended wall.

  The fixing portion of the base plate has a fixing screw insertion portion for inserting a fixing screw for fastening and fixing to the door or the vehicle body, and the fixing screw insertion portion in the fixing portion and the shaft support portion of the hook in the support portion are formed in the base plate The striker is shifted in the entry direction with respect to the striker entry groove, and the angle of the support part is changed to increase the tilt angle of the pivot shaft of the hook relative to the fixed part according to the deployment deformation of the deployment extension wall It is preferable to make it.

  The base plate preferably has a shape having a side wall portion extending between the fixing portion and the support portion by separating the fixing portion and the support portion in a direction intersecting the support portion and the fixing portion. As one aspect thereof, it is possible to form the side wall portion longer than the separation length between the fixing portion and the support portion, and to configure the developed length extension wall portion by the surplus length portion of the side wall portion. For example, it is preferable that the extended length extension wall portion is formed by a curved shape portion that is formed between the fixed portion and the side wall portion and protrudes in a direction away from the support portion. As another aspect, the development length extension wall part may be constituted by making at least a part of the side wall part into a non-planar shape.

  According to the above door lock device of the present invention, the base plate allows the position change of the support portion relative to the fixed portion by deploying and deforming the deployable extension wall portion. It is possible to maintain a stable strength against such a load that acts in the direction intersecting the support portion. Also, the fixing screw insertion part in the base plate fixing part and the hook support part of the hook in the support part are arranged shifted in the striker entry direction with respect to the striker entry groove of the base plate, and according to the development deformation of the extension length extension wall part By increasing the angle of inclination of the pivot shaft of the hook relative to the fixed part, the load (straight load) perpendicular to the striker entry direction to the base plate can be changed to the load in the striker entry direction. It becomes composition.

It is a perspective view of an embodiment of a door lock device to which the present invention is applied. It is a disassembled perspective view of the latch mechanism of the door lock device. It is the perspective view which removed the upper plate and showed the locked state of the latch mechanism of the door lock device. It is the perspective view which removed the lock release operation state of the latch mechanism of the door lock device, and removed the upper plate. It is the perspective view which removed the upper plate of the unlocking state of the latch mechanism of the door lock apparatus. It is a side view which shows a mode that the door lock apparatus was mounted in the rear door of a motor vehicle. It is sectional drawing of the baseplate which comprises the latch mechanism of the door lock apparatus. It is sectional drawing of different embodiment of the baseplate of a latch mechanism. It is sectional drawing of different embodiment of the baseplate of a latch mechanism.

  The door lock device of the present invention will be described based on the illustrated embodiment. As shown in FIG. 6, the door lock device 10 is attached between an outer panel 51 and an inner panel 52 constituting the rear door 50, and is attached to a frame 61 on the vehicle body 60 side that supports the rear door 50 so as to be opened and closed. Is provided with a striker S that engages and disengages the door lock device 10. In FIG. 6, reference numeral 62 is a bumper, reference numeral 53 is a switch for unlocking the door lock device 10 from outside the vehicle, and reference numeral 54 is a connection between the door lock device 10 and a control device mounted on the vehicle body 60 side. Cable.

  As shown in FIGS. 1 and 6, the door lock device 10 includes a latch mechanism 10 </ b> R that engages with the striker S, and an electric device 10 </ b> P as a latch release mechanism that releases and engages the latch mechanism 10 </ b> R with the striker S. The latch mechanism 10R and the electric device 10P are connected.

  As shown in FIG. 2, the latch mechanism 10 </ b> R includes a base plate 11 that is fixedly attached to the rear door 50, and an upper plate 31 that is fixed to the base plate 11 with the intermediate frame 21 interposed therebetween. In this embodiment, the base plate 11 and the upper plate 31 are made of metal, and the intermediate frame 21 is made of synthetic resin.

  As shown in FIG. 6, the rear door 50 has a door opening 50 b that communicates with the door bottom wall 50 a facing downward in the closed state of the door and the interior space between the outer panel 51 and the inner panel 52 and the outside. Is formed through. The base plate 11 has a pair of fixing flange portions (fixing portions) 11a fastened and fixed to the inner surface side of the door bottom wall portion 50a via fixing screws and nuts (not shown), and the pair of fixing flange portions 11a are connected to the door bottom. In a state of being fastened and fixed to the wall portion 50a, a box-shaped portion including a pair of side wall portions 11b and a bottom plate portion (supporting portion) 11c connecting the bottom portions protrudes outward through the door opening 50b. When the base plate 11 is fixed to the door bottom wall portion 50a of the rear door 50, the aforementioned fixing screws are inserted into the cylindrical fixing screw insertion portions 11a-1 formed in the pair of fixing flange portions 11a.

  As shown in FIG. 2, the pair of fixed flange portions 11a of the base plate 11 are substantially parallel to each other, and the bottom plate portion 11c is an inclined surface portion protruding obliquely downward with respect to the pair of fixed flange portions 11a. The pair of fixed flange portions 11a and the bottom plate portion 11c are separated from each other in the direction intersecting the plate surface (the direction along the axis of the shaft pins 12 and 13 supporting the hook 14 and the ratchet lever 15 described later). A pair of side wall portions 11b are extended between the pair of fixed flange portions 11a and both side portions of the bottom plate portion 11c. Each of the pair of side wall portions 11b is formed to be longer than the separation length of the fixed flange portion 11a and the bottom plate portion 11c, and a pair of unfolded portions are projected by projecting an excessive length portion of each side wall portion 11b toward the fixed flange portion 11a. A long extension wall portion 11d is formed. More specifically, each extended length extension wall portion 11d protrudes upward (in a direction opposite to the bottom plate portion 11c) from the fixed flange portion 11a, and is folded downward (in a direction approaching the bottom plate portion 11c) to return to the side wall portion 11b. The curved portion is continuous, and the folded portion is formed in a smooth arc shape. The pair of extended length extending wall portions 11d have substantially symmetrical shapes with respect to the center of the base plate 11 in the width direction.

  As shown in FIG. 2, the bottom plate portion 11c of the base plate 11 is formed with a striker entry groove 11e into which the striker S can enter, and the shaft pins 11f and 11g are located between the striker entry grooves 11e. 12 and the shaft pin 13 are inserted. The shaft pin 12 is inserted into a shaft hole 14 a formed in the hook 14, and the hook 14 is supported to be rotatable about the shaft pin 12. The shaft pin 13 is inserted into a shaft hole 15 a formed in the ratchet lever 15, and the ratchet lever 15 is supported to be rotatable about the shaft pin 13. Support seats 11h and 11i are formed around shaft holes 11f and 11g through which the shaft pins 12 and 13 are inserted in the bottom plate portion 11c of the base plate 11, the hook 14 is on the support seat 11h, and the ratchet lever 15 is Each is supported on a support seat 11i.

  The hook 14 includes a striker holding groove 14b formed in a substantially radial direction centering on the shaft hole 14a. The striker holding groove 14b is formed between the pair of first leg 14c and second leg 14d. A ratchet lever engaging step 14e is formed near the tip of the second leg 14d on the side facing the striker holding groove 14b.

  The hook 14 is rotatable between the striker holding position shown in FIG. 3 and the striker release position shown in FIGS. 4 and 5 around the shaft center of the shaft hole 14a (shaft pin 12). , And is urged to rotate toward the striker release position (counterclockwise in FIGS. 3 to 5). The torsion spring 16 includes a pair of spring end portions including a coil portion that surrounds the shaft pin 12 and end portions that engage (contact) the spring hooking protrusion 14 f of the hook 14 and the intermediate frame 21.

  The ratchet lever 15 has a hook engaging protrusion 15b whose front end surface engages with the ratchet lever engaging step portion 14e and restricts the rotation of the hook 14 in the striker release position direction and is held at the striker holding position (locked state); An open protrusion 15c that receives a turning operation force in a direction in which the side surface is pressed by the release protrusion 45a (FIGS. 3 to 5) of the open lever 45 to release the engagement with the ratchet lever engagement step 14e is provided. Yes.

  The ratchet lever 15 positions the hook engagement protrusion 15b on the movement locus of the ratchet lever engagement step portion 14e of the hook 14 (ratchet lever engagement step) with the shaft center of the shaft hole 15a (the shaft pin 13) as the center. The latch position (which can be engaged with the portion 14e) (FIG. 3) and the hook engaging protrusion 15b are retracted from the movement locus of the ratchet lever engaging step portion 14e (not engaged with the ratchet lever engaging step portion 14e). It is formed so as to be rotatable between positions (FIG. 4), and is urged to rotate by a torsion spring 17 from the unlatched position toward the latch position (clockwise in FIGS. 3 to 5). The torsion spring 17 includes a coil portion that surrounds the shaft pin 13, and a pair of spring end portions that engage (contact) the spring hooking protrusion 15 d of the ratchet lever 15 and the intermediate frame 21.

  In the intermediate frame 21, a striker entry groove 21a corresponding to the striker entry groove 11e of the base plate 11 into which the striker S can enter is formed, and shaft holes 21b and 21c are formed at positions facing the shaft holes 11f and 11g. The shaft pins 12 and 13 are inserted through the shaft holes 21b and 21c. At the deepest part of the striker entry groove 21a, a cushion rubber 23 is inserted and held as a buffer member that abuts against the striker S that has entered the striker entry groove 21a and absorbs impact.

  An upper plate 31 is fixed to the upper part of the intermediate frame 21 so as to cover the torsion springs 16 and 17 and the cushion rubber 23. The upper plate 31 is also formed with striker entry grooves 31a similar to the striker entry grooves 11e and 21a of the base plate 11 and the intermediate frame 21, and further the shaft holes 11f and 11g of the base plate 11 and the shaft holes 21b of the intermediate frame 21. , 21c, shaft holes 31b, 31c into which the tip portions of the shaft pins 12, 13 are fitted are formed. The tip ends of the shaft pins 12 and 13 passing through the shaft holes 11f and 21b and the shaft holes 11g and 21c are inserted into these shaft holes 31b and 31c, and are crushed and fixed by caulking or the like.

  Further, the upper plate 31 is provided with a bent protrusion 31d for connecting to the electric device 10P, and a screw insertion hole 31e is formed in the bent protrusion 31d. By screwing a screw (not shown) inserted through the screw insertion hole 31e into a screw hole on the electric device 10P side, the latch mechanism 10R is fixed to the electric device 10P as shown in FIG. The electric device 10P is an open device in which a worm wheel (not shown) with an eccentric cam is rotationally driven by a motor (not shown) provided in the case 41, and a cam sliding contact end portion 45c is brought into contact with the eccentric cam. The lever 45 (FIGS. 3 to 5) is swung around the shaft hole 45b according to the rotation of the worm wheel. In addition to the driving force of the motor, the open lever 45 is further formed with a manually operated bending piece 45d for transmitting a manually rotating operating force from the inside of the vehicle.

  Next, the operation of the door lock device 10 will be described with reference to FIGS. In the locked state shown in FIG. 3, the hook 14 is in the striker holding position, and the striker S is held in the striker holding groove 14 b of the hook 14. The hook engaging protrusion 15b of the ratchet lever 15 is engaged with the ratchet lever engaging step portion 14e to prevent the hook 14 from rotating in the striker releasing direction.

  When the motor of the electric device 10P is driven in the unlocking direction from this locked state, the open lever 45 rotates, and the release protrusion 45a presses the open protrusion 15c of the ratchet lever 15 to unlatch the ratchet lever 15. Rotate in the direction. The unlocking rotation of the open lever 45 can also be performed manually by way of the manually operated bending piece 45d. When the ratchet lever 15 is pivoted to the unlatched position, the hook engaging projection 15b of the ratchet lever 15 is disengaged from the ratchet lever engaging step portion 14e of the hook 14 to make the hook 14 free. Then, the hook 14 is rotated toward the striker release position by the urging force of the torsion spring 16, and the striker S comes out of the striker holding groove 14b (see FIG. 4). As a result, the door lock device 10 is unlocked, and the rear door 50 can be freely opened.

  The motor of the electric device 10P further rotates in the unlocking direction and stops when the worm wheel makes one rotation. As a result, the open lever 45 returns to the same position as in the locked state (FIG. 5). However, since the hook 14 is rotated to the striker release position and stopped, the ratchet lever 15 rotated in the latch position direction by the rotation urging force of the torsion spring 17 causes the hook engagement protrusion 15b to be connected to the hook 14. The unlocked state is brought into contact with the outer peripheral surface of the two leg portions 14d and stopped.

  When the rear door is closed in this unlocked state, the striker S first contacts the second leg portion 14d of the hook 14 and enters the striker entry grooves 11e, 21a, and 31a while rotating the hook 14 in the locking direction. And proceed towards that depth. The hook 14 rotates in the striker holding position direction while the outer peripheral surface of the second leg portion 14 d is brought into sliding contact with the hook engaging protrusion 15 b of the ratchet lever 15.

  When the striker S advances to the deepest part of the striker entry grooves 11e, 21a, and 31a, the hook engaging protrusion 15b of the ratchet lever 15 rotates to a position where it engages with the ratchet lever engaging step part 14e of the hook 14. On the other hand, the striker S collides with the cushion rubber 23 and stops. The striker S is pushed in the direction of exiting the striker entry grooves 11 e, 21 a and 31 a by the elastic restoring force of the cushion rubber 23, but the hook 14 is engaged with the hook engaging protrusion 15 b of the ratchet lever 15 by the ratchet lever engaging step 14 e. Since the rotation in the striker releasing direction is prevented, the striker S is held in that position. That is, the locked state of FIG. 3 is obtained.

  In the door lock device 10 described above, when the hook 14 holds the striker S (FIG. 3, FIG. 6), when an excessive load in a direction different from the normal door opening / closing operation is applied to the base plate 11, Stable strength can be maintained while maintaining the locked state as follows. For example, in FIG. 6, it is assumed that a load is applied between the vehicle main body 60 and the rear door 50 so as to separate the striker S and the door lock device 10 in the vertical direction. Specifically, it is a load in a direction in which the striker S is displaced downward with respect to the base plate 11, and the striker S uses the striker entry groove 11e in normal locking and unlocking operations with reference to the bottom plate portion 11c of the base plate 11. , 21a and 31a are pulled in a direction (straight forward direction) that intersects the direction of entry. This load acts so as to push down the bottom plate portion 11c (support seat 11h) of the base plate 11 along the axial direction of the shaft pin 12 that supports the hook 14 via the hook 14 that holds the striker S. To do. In other words, a load in the direction of separating the bottom plate portion 11c from the fixed flange portion 11a acts on the base plate 11. The latch mechanism 10R holds the striker S by the engagement of the thick hook 14 and the ratchet 15 with respect to the load in the insertion / removal direction of the striker S (the formation direction of the striker entry grooves 11e, 21a and 31a). High load resistance is ensured. On the other hand, since the load in the direction intersecting with the striker entry grooves 11e, 21a and 31a is input as the load in the plate surface crossing direction (plate thickness direction) in the bottom plate portion 11c of the base plate 11, the resistance of the base plate 11 alone. Load performance is required. Here, when the strength is increased by increasing the thickness of the base plate 11 including the bottom plate portion 11c, there is a demerit that the manufacturing cost increases and the weight of the component also increases.

  On the other hand, the base plate 11 of this embodiment does not connect only the side wall part 11b of the shape which short-circuits most between the baseplate part 11c which receives a load, and each fixing flange part 11a which fixes the base plate 11. In addition, the deployment length extension wall portion 11d is included so that the deployment length has a margin. Then, when an excessive load is applied in the crossing direction of the plate surface that causes the bottom plate portion 11c to be displaced downward in FIG. 6, as shown by a one-dot chain line in FIG. Instead of reducing the amount of protrusion, the side wall portion 11b is expanded and deformed from the bent shape in a manner in which the side wall portion 11b is extended, allowing the bottom plate portion 11c to move in the separation direction with respect to the fixed flange portion 11a. Thereby, the holding state of the striker S by the hook 14 can be maintained without causing strength reduction due to partial cutting of the base plate 11 or the like. That is, the locked state of the rear door 50 can be prevented from being released unintentionally. In addition, since the expansion | extension length extension wall part 11d is the shape curved smoothly in the normal bending state, it can expand | deploy and deform | transform smoothly.

  In the base plate 11, the position where the fixing screw insertion portion 11a-1 of the fixing flange portion 11a is formed, and the shaft support position of the hook 14 and the ratchet 15 in the bottom plate portion 11c (shaft pins 12 and 13, support seats 11h and 11i). Are offset in the approach (detachment) direction of the striker S with respect to the striker entry grooves 11e, 21a and 31a, that is, in the front-rear direction. When the base plate 11 expands and deforms the extended length extending wall portion 11d in response to a load input to the bottom plate portion 11c, the bottom plate portion 11c has its tip portion gradually directed downward (parallel to the load acting direction). The degree of inclination with respect to the fixed flange portion 11a is increased. Then, the tilt angle of the shaft pins 12 and 13 that pivotally support the hook 14 and the ratchet 15 on the bottom plate portion 11c of the base plate 11 with respect to the fixed flange portion 11a increases. As a result, the load component (the load in the striker straight direction) that presses the bottom plate portion 11c in the direction intersecting the plate surface is gradually reduced, and instead the striker S places the hook 14 (the first leg portion 14c) in the striker release position. The load component (load in the striker approach direction) that tends to be pulled toward increases. Thereby, the load which caused the deformation | transformation to the baseplate 11 will be received also by the engaging part of the hook 14 and the ratchet 15, and load resistance can be improved and the locked state of the rear door 50 can be maintained reliably. That is, the base plate 11 not only absorbs the load by simply deforming the deployed length extending wall portion 11d, but also changes the direction of the load component acting on the door lock device 10 in accordance with the deformation, thereby providing more stable strength. Securing has been achieved.

  Further, as shown in FIG. 7, in the base plate 11, the development length extending wall portion 11 d is formed between the fixed flange portion 11 a and the side wall portion 11 b, thereby the door opening portion 50 b in the bottom wall portion 50 a of the rear door 50. The opening width can be reduced. That is, in the case where the extended length extension wall portion 11d is not provided (the shape indicated by the one-dot chain line in FIG. 7), a connection region for smoothly connecting the fixed flange portion 11a and the side wall portion 11b is formed, and the door opening 50b The opening width needs to be set to a size (W2 or more) that avoids interference with the connection region. On the other hand, when the extended length extending wall portion 11d is formed as in the present embodiment, there is no portion that interferes with the inner edge portion of the door opening portion 50b in the portion from the fixed flange portion 11a to the side wall portion 11b. The opening width of the portion 50b can be reduced (W1) until it approaches the pair of side wall portions 11b. Narrowing the opening width of the door opening 50b is advantageous for securing the strength of the rear door 50. Therefore, the fact that the extended length extending wall portion 11d is formed on the base plate 11 is not only the strength of the base door 11 but also the strength of the rear door 50. Contributes to improvement.

  In the base plate 11 of this embodiment, the side wall portion 11b is formed longer than the separation length in the direction intersecting with the plate surfaces of the fixed flange portion 11a and the bottom plate portion 11c, and the surplus length portion is connected to the fixed flange portion 11a. The extended length extending wall portion 11d is formed by folding back between the two, but it is also possible to form the extended length extending wall portion in a form in which the surplus length portion of the side wall portion 11b is turned back to the bottom plate portion 11c. . That is, in the form shown in FIG. 7, the unfolded extended wall part 11d is formed in a form that protrudes upward between the fixed flange part 11a and the side wall part 11b, but between the bottom plate part 11c and the side part 11b. It is also possible to form the extended length extension wall portion in a form that protrudes downward.

  8 and 9 show cross-sectional shapes of the base plates 111 and 211 according to another embodiment in which the formation positions of the extended length extension wall portions are different. In the base plate 11 of the previous embodiment, the surplus length portion of the side wall portion 11b formed longer than the separation length in the plate surface crossing direction of the fixing flange portion 11a and the bottom plate portion 11c is used as the fixing flange portion 11a (or the bottom plate portion 11c). 8d is formed by folding back upward (or downward) between the base plate 111 of FIG. 8 and the base plate 211 of FIG. 9 with the side wall 111b and the side wall 211b. The development length extension wall part is formed by making it non-planar shape.

  Specifically, the base plate 111 shown in FIG. 8 has a pair of convex portions toward the center of the base plate 111 in the upper region of the pair of side wall portions 111b connecting the pair of fixing flange portions 111a and the bottom plate portion 111c. A deployed length extending wall portion 111d is formed. The extended length extending wall portion 111d is a bent shape portion that protrudes in the center direction of the base plate 111 following the fixed flange portion 111a and is then turned back to the side wall portion 111b.

  The base plate 211 shown in FIG. 9 has a pair of extension lengths that protrude toward the direction away from the center of the base plate 211 in the lower region of the pair of side wall portions 211b connecting the pair of fixed flange portions 211a and the bottom plate portion 211c. A wall portion 211d is formed. The extended length extending wall portion 111d is a bent shape portion that protrudes in a direction away from the center of the base plate 211 following the bottom plate portion 211c and then folded back to the side wall portion 211b.

  In the form of FIG. 8 and FIG. 9, the base plate 111, 211 is bent when an excessive load is applied to the bottom plate portions 111c, 211c in the downward direction in the figure (in a direction away from the fixed flange portions 111a, 211a). The bottom plate portions 111c and 211c are allowed to be displaced downward by expanding and deforming the shape expansion length extension wall portions 111d and 211d so as to approach a plane. Thereby, it can endure a load, maintaining a locked state.

  Although the present invention has been described based on the illustrated embodiments, the present invention is not limited to these embodiments. For example, although the illustrated embodiment is applied to a so-called minivan rear door lock device, the present invention can also be applied to vehicle types other than minivans and doors other than rear doors.

  Further, the positional relationship between the door lock device 10 and the striker S can be reversed from that in the illustrated embodiment, the striker S can be provided on the rear door 50 side, and the door lock device 10 can be provided on the vehicle body 60 side.

  Further, the present invention does not ask the detailed structure of the latch release mechanism for the latch mechanism 10R, and a latch release mechanism having only a manual latch release mechanism may be used in place of the illustrated motorized device 10P with a motor. .

DESCRIPTION OF SYMBOLS 10 Door lock apparatus 10P Electric apparatus 10R Latch mechanism 11 Base plate 11a Fixed flange part (fixed part)
11b Side wall part 11c Bottom plate part (support part)
11d Unfolding extension wall 11e Strike entry groove 12 Axial pin (hook pivot axis)
13 shaft pin (rotating shaft of ratchet lever)
14 hook 15 ratchet lever 21 intermediate frame 31 upper plate 45 open lever 50 rear door 60 vehicle body S striker

Claims (5)

A base plate fixed to one of the door and the vehicle body is provided, and the striker fixed to the other of the door and the vehicle body is held by a hook that is rotatably supported by the base plate to hold the door in a fully closed state. In the door lock device that allows the door to be opened by releasing the striker holding by the hook,
The base plate
A fixing portion fixed to one of the door and the vehicle body;
A support portion for rotatably supporting the hook;
It is formed between the fixed part and the support part, usually has a bent shape, and is expanded and deformed in response to a load input in the crossing direction of the support part with respect to the support part when the striker is held by the hook. A deployable extension wall that allows the support to move relative to the fixed part;
The door lock device characterized by having. 2. The door lock device according to claim 1, wherein the fixing portion of the base plate has a fixing screw insertion portion for inserting a fixing screw for fastening and fixing to the door or the vehicle main body, and the fixing screw insertion portion in the fixing portion and the above The shaft support part of the hook in the support part is shifted in the entry direction of the striker with respect to the striker entry groove formed in the base plate, and the hook of the hook with respect to the fixed part is developed in accordance with the development deformation of the development length extension wall part. A door lock device characterized in that the angle of the support portion is changed in a direction to increase the tilt angle of the rotating shaft. 3. The door lock device according to claim 1, wherein the base plate extends between the fixing portion and the supporting portion by separating the fixing portion and the supporting portion in a direction intersecting the supporting portion and the fixing portion. The door is characterized in that the side wall is formed longer than the separation length between the fixed part and the support part, and the extended length extension wall part is constituted by the surplus length part of the side wall part. Locking device. 4. The door lock device according to claim 3, wherein the extended length extending wall portion is formed of a curved shape portion formed between the fixed portion and the side wall portion and protruding in a direction away from the support portion. Locking device. 3. The door lock device according to claim 1, wherein the base plate separates the fixing portion and the supporting portion in a direction intersecting the supporting portion and the fixing portion, and extends between the fixing portion and the supporting portion. A door lock device characterized in that the deployed length extending wall portion is configured by forming a side wall portion to be formed, and forming at least a part of the side wall portion into a non-planar shape.

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