WO2015012288A1 - Latch device for vehicle - Google Patents

Abstract

　A purpose of the invention is to minimize the change in an engaged state of a latch and a rod-shaped part even when a base plate has deformed during a collision. A latch device (1) for a vehicle is provided with a latch (20) capable of engaging with a rod-shaped part, a base plate (10) turnably supporting the latch (20) and having a stress-concentrated part (SC) configured so as to deform under the concentration of stress during a collision, and a restricting member (a first bolt (B1)) for restricting the deformation of the stress-concentrated part (SC) during a collision, the restricting member being provided in proximity to the stress-concentrated part (SC).

Description

Vehicle latch device

The present invention relates to a vehicle latch device used for fixing a vehicle seat or the like.

In general, a seat provided so as to be rotatable with respect to the vehicle body is provided with a vehicle latch device on a leg or the like, and the vehicle latch device is fixed to the vehicle body by engaging with a striker fixed to the vehicle body. Has been. The lever for operating the vehicle latch device is provided at an appropriate position away from the vehicle latch device so that the user can easily operate the traction member such as a wire or a rod between the lever and the vehicle latch device. The pulling member transmits the operation of the lever to the vehicle latch device.

As such a vehicle latch device, there is conventionally known a device including a base plate fixed to a seat frame and a latch that is rotatably supported by the base plate and engages with a striker (see Patent Document 1). In the vehicle latch device, the latch is operated by a ratchet, an open lever, and an operating lever, and a wire is engaged with the open lever. The latch is opened and closed by pulling the wire with a lever or the like located away from the vehicle latch device.

In this vehicle latch device, when the open lever is pulled with a wire, the open lever is rotated, and this rotation is transmitted to the ratchet by the engagement of the groove provided in the open lever and the operating arm of the ratchet. The groove of the open lever is formed in a shape that prevents the ratchet from further transmitting the rotational force when the latch is fully opened. Even in such a case, it is possible to suppress a large load from being applied to the vehicle latch device.

JP 2011-068262 A

By the way, the above-described base plate is generally configured with a large plate thickness that does not deform in the event of a vehicle collision. However, if the thickness of the base plate is reduced in order to reduce the weight of the vehicle latch device, the base plate is deformed in the event of a vehicle collision, and the direction of the latch changes due to the deformation of the base plate. The striker engagement state may change.

Further, in the configuration of Patent Document 1, since many parts are provided between the latch and the wire, there is a problem that the vehicle latch device becomes complicated.

Therefore, an object of the present invention is to suppress a change in the engagement state between the latch and the striker (rod-like portion) even when the base plate is deformed at the time of collision.

Another object of the present invention is to suppress a large load on the vehicle latch device with a simple configuration.

Another object of the present invention is to suppress an increase in the number of parts, to reduce the size of the vehicle latch device, and to operate the latch satisfactorily.

The present invention that solves the above-described problems is a vehicle latch device that engages with or disengages from a rod-shaped portion, a latch that can be engaged with the rod-shaped portion, and the latch that supports the latch so as to be able to rotate. A base plate having a stress concentration part configured to be deformed in a concentrated manner, and a regulating member provided in the vicinity of the stress concentration part and restricting deformation of the stress concentration part at the time of collision.

Here, “in the vicinity of the stress concentration portion” means that the deformation of the stress concentration portion is close enough to be restricted by the restriction member at the time of collision.

According to this configuration, even if the stress concentration portion is deformed at the time of collision, the deformation is restricted by the restricting member, so that it is possible to suppress the engagement state between the latch and the rod-like portion from being changed due to the deformation of the base plate.

In the above-described configuration, the restricting member may be a first fastening member for fastening the base plate to another member.

According to this, since the number of parts can be reduced as compared with, for example, a structure in which the regulating member and the fastening member are provided separately, the vehicle latch device can be downsized.

In the configuration described above, in the base plate, the pivot shaft of the latch may be disposed on the opposite side of the regulating member across the stress concentration portion.

According to this, even when the rotation axis of the latch moves toward the restricting member due to the deformation of the stress concentrating portion at the time of the collision, when the deformation of the stress concentrating portion is restricted by the restricting member, the rotation of the latch is suppressed. Since the movement of the moving shaft is also restricted, it is possible to further suppress a change in the engagement state between the latch and the rod-shaped portion.

In the above-described configuration, the latch may be provided in the vicinity of the stress concentration portion, and may be configured to abut against the stress concentration portion at the time of collision and to restrict movement.

Here, “in the vicinity of the stress concentration portion” means that the latch is close enough to contact the stress concentration portion at the time of collision.

According to this, since the movement of the latch is restricted by the stress concentration portion at the time of the collision, it is possible to further suppress the change of the engagement state between the latch and the rod-shaped portion.

In the above configuration, the latch includes a metal latch main body and a resin cover that covers a part of the latch main body, and the latch main body abuts on the stress concentration portion at the time of a collision. It may be arranged.

According to this, when the latch main body comes into contact with the stress concentration portion at the time of collision, since the latch main body is made of metal and is not easily deformed, for example, compared to the structure in which the resin cover contacts the stress concentration portion, The movement of the latch can be further suppressed, and the change in the engagement state between the latch and the rod-shaped portion can be further suppressed.

In the above-described configuration, the base plate includes a first wall on which the restricting member is provided, and a second wall disposed at a position farther from the other member than the first wall, and the stress The concentrated portion is formed to connect the first wall and the second wall, and a height of the restricting member from the first wall is equal to or higher than a height of the stress concentrated portion from the first wall. It may be configured to be.

According to this, since the deformation of the stress concentration portion can be further suppressed by the restriction member higher than the stress concentration portion, it is possible to further suppress the change of the engagement state between the latch and the rod-shaped portion.

In the configuration described above, at least a part of the latch may be disposed closer to the second wall than the first wall in the rotation axis direction of the latch.

Accordingly, for example, the vehicle latch device can be downsized in the direction of the rotation axis as compared with a structure in which the latch is disposed on the opposite side of the second wall from the first wall in the direction of the rotation axis of the latch. .

Further, in the above-described configuration, a second fastening member for fastening the base plate to the other member is provided separately from the first fastening member, and from the pivot shaft of the latch to the first fastening member. You may comprise so that distance may become smaller than the distance from the rotating shaft of the said latch to the said 2nd fastening member.

According to this, the force applied to the vicinity of the first fastening member from the pivot shaft of the latch through the base plate at the time of the collision is larger than the force applied to the vicinity of the second fastening member. It is easy to deform preferentially over the part. As a result, the effect of restricting the deformation of the stress concentration portion by the restricting member can be more reliably exhibited, and the change of the engagement state between the latch and the rod-like portion can be more reliably suppressed.

In the above-described configuration, the base plate may be formed with a circular hole through which the first fastening member is inserted and a long hole through which the second fastening member is inserted.

According to this, a manufacturing error can be absorbed by making one hole into a long hole among a plurality of holes for inserting a plurality of fastening members. Further, since the first fastening member as the restricting member is passed through the circular hole, the edge of the circular hole is formed when the stress concentration portion is deformed, for example, compared to a structure in which the first fastening member is passed through the long hole. Since it immediately contacts the first fastening member, deformation of the stress concentration portion can be further suppressed, and change in the engagement state between the latch and the rod-shaped portion can be further suppressed.

Further, in the above-described configuration, the vehicle latch device includes a traction member for rotating the latch by pulling the latch, and an engagement portion provided at the latch and provided at a tip of the traction member. And a latch side engaging portion to be engaged.
The latch is rotatable between a first posture engaged with the rod-like portion and a second posture when the latch member is pulled out to the maximum while being detached from the rod-like portion.
The latch side engaging portion is adjacent to the holding recess and the holding recess until the latch rotates to a third posture between the first posture and the second posture. And a slide engagement portion extending in a direction away from the rotation shaft of the latch.
The engaging portion rotates around the rotation shaft while engaging with the holding recess until the latch rotates from the first posture to the third posture, and the latch is moved to the first posture. It is configured to move in a direction away from the rotation axis along the slide engagement portion while engaging with the slide engagement portion until it rotates from the three postures to the second posture.

According to this configuration, until the latch rotates from the first posture to the third posture, the engaging portion of the traction member rotates around the rotation shaft while engaging the holding recess, Since the force from the pulling member is transmitted well to the latch, the latch can be rotated well. In addition, until the latch is rotated from the third posture to the second posture, the engaging portion of the traction member is engaged with the slide engaging portion and moves away from the rotating shaft along the slide engaging portion. Since the force transmitted from the traction member to the latch can be released by moving to the vehicle, it is possible to suppress a large load from being applied to the vehicle latch device. Furthermore, since the latch-side engagement portion having such a holding recess and a slide engagement portion is provided in the latch, the number of parts between the latch and the wire can be reduced, and the vehicle latch device can be simplified. You can plan.

Further, in the above-described configuration, the latch side engaging portion may be a separate member from the latch.

Even in this case, the number of parts can be reduced and the vehicle latch device can be simplified as compared with the conventional vehicle latch device. In addition, according to the type of the object to which the vehicle latch device is to be attached, the latch-side engagement portion having a different shape is simply attached to the latch. Without changing the structure, it is possible to freely adjust the moving amount of the engaging portion of the traction member, and to suppress the load on the vehicle latch device due to the pulling of the traction member.

Further, in the above-described configuration, the engaging portion may be configured to be movable along a plane orthogonal to the rotation axis.

According to this, for example, the vehicle latch device can be downsized in the rotation axis direction compared to a structure in which the engaging portion moves in the rotation axis direction.

In the above-described configuration, a first locking portion that restricts the movement of the engaging portion toward the rotating shaft may be provided on the side of the holding recess opposite to the slide engaging portion. Good.

According to this, when the latch that is in the first posture is pulled by the pulling member, even if the engaging portion tries to move to the rotating shaft side by mistake, the movement can be suppressed by the first locking portion. The latch can be operated well.

In the above-described configuration, the extending wall extends from the holding recess toward the first locking portion, and the extending wall has the first locking portion when the latch is in the first posture. It may be inclined toward the downstream side in the pulling direction of the pulling member as it goes from the holding recess to the holding recess.

According to this, even when the engaging portion is shifted from the holding recess and engaged with the extending wall in the first posture, the extending portion is inclined when the pulling member is pulled. Since it can be moved to the holding recess along the wall, the latch can be operated satisfactorily.

Further, in the above-described configuration, the surface of the holding recess that engages with the engaging portion may be connected to the surface of the slide engaging portion that engages with the engaging portion without a step.

According to this, since the engaging portion moves smoothly from the holding recess to the slide engaging portion, the latch can be rotated smoothly.

Further, in the above-described configuration, the latch side engaging portion may include a plate-like portion in which a slit for passing the pulling member is formed and a rib portion standing from the plate-like portion. Good.

According to this, since the rigidity of the plate-like portion in which the slit is formed can be increased by the rib portion, the deformation of the plate-like portion can be suppressed and the latch can be operated satisfactorily.

In the above-described configuration, the rib portion may be erected toward the opposite side to the engagement portion.

According to this, since the movement of the engaging portion is not obstructed by the rib portion, the engaging portion can be moved smoothly, and the latch can be operated well.

Further, in the above-described configuration, the latch may be configured to be disengaged from the rod-shaped portion during the period from the first posture to the third posture.

According to this, since the latch is released from the rod-shaped portion until the latch is changed from the first posture to the third posture, that is, while the force from the traction member is transmitted to the latch well and the latch is largely rotated, The latch can be operated well.

Further, in the above-described configuration, a second locking portion that restricts the engagement portion from moving in a direction away from the holding recess is provided on the opposite side of the slide engagement portion from the holding recess. May be.

According to this, when the pulling member is pulled, it is possible to suppress the engagement portion from being disengaged from the slide engagement portion by the second locking portion, so that the latch can be operated satisfactorily.

It is a side view of a vehicle seat provided with a vehicle latch device. It is the side view which looked at the latch apparatus for vehicles from the inside. It is the exploded perspective view (a) which decomposes | disassembles and shows the latch apparatus for vehicles, and A arrow view (b) which shows the slit of Fig.3 (a). They are a side view (a) showing a state in which the latch is in the locked posture, a side view (b) showing a state in the midway posture, and a side view (c) showing a state in the maximum tension posture. FIG. 3 is a cross-sectional view taken along the line II in FIG. 2, which is a cross-sectional view (a) showing a state before a collision and a cross-sectional view (b) showing a state after the collision. It is a side view which shows the latch apparatus after a collision. It is a figure which shows the modification of a holding | maintenance recessed part.

Hereinafter, an embodiment of a vehicle latch device according to the present invention will be described with reference to the accompanying drawings. For example, as shown in FIG. 1, the vehicle latch device according to the embodiment is provided on a leg S <b> 1 of a vehicle seat S such as an automobile. The vehicle latch device 1 fixes the vehicle seat S to the floor F by engaging with a striker 90 fixed to the floor F of the vehicle, and releases the vehicle seat S from the floor F by detaching from the striker 90. It is supposed to be. In the present embodiment, front and rear, left and right, and top and bottom are based on a passenger sitting on the vehicle seat S.

As shown in FIG. 2, the vehicle latch device 1 includes a base plate 10, a latch 20 that can be engaged with the rod-like portion 91 of the striker 90, a latch-side engagement member 30 as an example of a latch-side engagement portion, And a wire 40 as an example of a pulling member.

As shown in FIG. 3A, the base plate 10 is a long plate-like member formed by press-molding a sheet metal, and a bottom wall portion 11 as an example of a second wall orthogonal to the left-right direction; The front wall portion 12 extending rightward from the front end of the bottom wall portion 11, the upper wall portion 13 extending rightward from the upper end of the bottom wall portion 11, and the rear wall portion 14 extending rightward from the lower portion of the rear end of the bottom wall portion 11. And a first flange portion 15 as an example of a first wall extending from the right end of the front wall portion 12 to the front side, and a second flange portion 16 extending from the right end of the rear wall portion 14 to the rear side.

A groove 11 a that opens downward is formed at the lower end of the bottom wall portion 11. The groove 11a is a groove for allowing the rod-like portion 91 (see FIG. 2) of the striker 90 to enter the inside of the bottom wall portion 11 (near the rotating shaft 20A of the latch 20 shown in FIG. 2). It is arranged to be adjacent to.

A bottomed cylindrical bulged portion 11 b that bulges rightward from the bottom wall portion 11 is formed on the upper side of the groove 11 a in the bottom wall portion 11. An attachment hole 11c for attaching a support shaft 51 and a fixing pin 52 that rotatably support the latch 20 is formed at the center of the bulging portion 11b. That is, the base plate 10 supports the latch 20 via the support shaft 51 so as to be rotatable.

As shown in FIG. 2, the front end of the bottom wall portion 11 is formed in such a shape that extends upward from the lower end, extends obliquely upward to the front, and then extends upward. As shown in FIG. 3A, the front wall portion 12 is formed in a shape that follows the front end of the bottom wall portion 11, and a cutout portion 12a that is recessed toward the left side is formed in the upper portion thereof. .

A portion including a front wall portion 12, a bent portion 12b that connects the front wall portion 12 and the bottom wall portion 11, and a bent portion 12c that connects the front wall portion 12 and the first flange portion 15 is a collision of a vehicle. In some cases, the stress concentration portion SC deforms preferentially over other portions due to concentration of stress. Here, when the vehicle seat S is likely to fall forward due to a vehicle collision, a large downward force is applied to the engagement portion of the latch 20 with the striker 90, as shown in FIG. This force is transmitted to the base plate 10 via the support shaft 51 and the fixing pin 52 that support the latch 20. The shape and position of the stress concentration portion SC are set by experiments, simulations, and the like so that the stress concentration portion SC is preferentially deformed over other parts by the force acting in such a direction.

As shown in FIG. 5 (a), the first flange portion 15 is disposed at a position closer to the leg S1 than the bottom wall portion 11, and a first bolt B1 as an example of a restricting member is disposed at an appropriate position. A circular hole 15a to be inserted is formed. Here, the first bolt B1 is a bolt for fastening the first flange portion 15 to a leg S1 as an example of another member, and the first bolt B1 is arranged in the vicinity of the stress concentration portion SC. In addition, the position of the circular hole 15a is set. The vicinity of the stress concentration portion SC refers to a position close to the extent that the deformation of the stress concentration portion SC can be regulated by the first bolt B1 at the time of vehicle collision, and this position is set by experiment, simulation, or the like.

By providing the first bolt B1 in the vicinity of the stress concentration portion SC in this manner, as shown in FIGS. 5A and 5B, the stress concentration portion SC is deformed toward the first bolt B1 when the vehicle collides. Even so, since the deformation is restricted by the first bolt B1, it is possible to prevent the latch 20 from changing the direction of the latch 20 due to the deformation of the base plate 10 and the engagement state between the latch 20 and the rod-shaped portion 91 from being changed. It has become. Further, since the first bolt B1 is passed through the circular hole 15a, for example, the edge of the circular hole 15a is first when the stress concentrating portion SC is deformed as compared with a structure in which the first bolt is passed through the long hole. Since the bolt B1 is immediately contacted, the deformation of the stress concentration portion SC can be further suppressed.

Further, the height of the first bolt B1 from the first flange portion 15 is equal to or higher than the height of the stress concentration portion SC from the first flange portion 15. Thereby, since the deformation of the stress concentration portion SC can be further suppressed by the first bolt B1, it is possible to further suppress a change in the engagement state between the latch 20 and the rod-shaped portion 91.

Referring back to FIG. 3A, the second flange portion 16 is formed with a long hole 16a through which a second bolt B2 (see FIG. 2) as an example of the second fastening member is inserted. Here, the second bolt B2 is a bolt for fastening the second flange portion 16 to the leg S1. The long hole 16a is formed to be long in the front-rear direction. Thus, it is possible to absorb a manufacturing error by making one hole out of the plurality of holes through which the plurality of bolts B1 and B2 are inserted into the long hole 16a.

As shown in FIG. 2, the distance from the rotation shaft 20A of the latch 20 to the first bolt B1 is configured to be smaller than the distance from the rotation shaft 20A of the latch 20 to the second bolt B2. As a result, the force applied to the vicinity of the first bolt B1 from the latch 20 via the base plate 10 at the time of the collision of the vehicle becomes larger than the force applied to the vicinity of the second bolt B2. It can be preferentially deformed over the part. As a result, the effect of restricting the deformation of the stress concentration portion SC with the first bolt B1 can be more reliably exhibited, and the engagement state between the latch 20 and the rod-shaped portion 91 can be more reliably suppressed. It has become.

As shown in FIGS. 2 and 3A, the latch 20 is a hook-shaped member having an engagement groove 20B that engages or disengages with the rod-shaped portion 91, and is fixed to the bulging portion 11b of the base plate 10. It is supported by the support shaft 51 fixed by this so that rotation is possible. The latch 20 is engaged with the rod-shaped portion 91 in a first posture (the posture in FIG. 2, hereinafter also referred to as a locked posture), and is disengaged from the rod-shaped portion 91 and in a second posture when the wire 40 is pulled to the maximum. (The posture in FIG. 4 (c), hereinafter also referred to as the maximum pulling posture).

Between the latch 20 and the flange 51a of the support shaft 51, a torsion spring 61 for urging the latch 20 toward the locked posture is provided. One end 61 a of the torsion spring 61 is engaged with the notch 12 a of the base plate 10, and the other end 61 b is engaged with the latch 20 or the latch side engagement member 30.

The latch 20 includes a metal latch body 21 and a resin cover 22 that covers a part of the latch body 21. The cover 22 is formed so as to mainly cover a groove corresponding to the engagement groove 20 </ b> B of the latch body 21.

The engaging groove 20B of the latch 20 opens toward the front side (first bolt B1 side) in the locked posture. Thereby, when the stress concentration portion SC is deformed at the time of collision of the vehicle and the latch 20 moves obliquely downward in the front direction, the rod-like portion 91 enters deeply into the engaging groove 20B. It is possible to further suppress the change of the combined state.

Rotating shaft 20A of latch 20 is arranged on the opposite side to first bolt B1 across stress concentration part SC. As a result, the deformation of the stress concentration portion SC is restricted by the first bolt B1 even if the rotation shaft 20A of the latch 20 tries to move toward the first bolt B1 due to the deformation of the stress concentration portion SC during the collision. Sometimes, the movement of the rotation shaft 20A of the latch 20 is also restricted, so that the engagement state between the latch 20 and the rod-shaped portion 91 changes when the rotation shaft 20A of the latch 20 moves too much and the direction of the latch 20 changes. It is possible to suppress this.

The latch 20, more specifically, a metal latch main body 21, is provided in the vicinity of the stress concentration portion SC, and is configured to abut against the stress concentration portion SC at the time of collision and to restrict movement. Here, the vicinity of the stress concentration portion SC means that the latch main body 21 is close enough to contact the stress concentration portion SC at the time of collision.

According to this, since the movement of the latch 20 at the time of the collision of the vehicle is restricted by the contact between the latch main body 21 and the stress concentration portion SC, the engagement state between the latch 20 and the rod-shaped portion 91 can be changed more. It is possible to suppress. In particular, in the present embodiment, the latch main body 21 that contacts the stress concentration portion SC at the time of collision is made of metal, so that the latch main body 21 is not easily deformed. Therefore, for example, the movement of the latch 20 can be further suppressed as compared with a structure in which the resin cover abuts on the stress concentration portion, and thus the engagement state between the latch 20 and the rod-shaped portion 91 can be further suppressed. It has become.

Further, as shown in FIG. 5A, a part of the latch 20 is disposed closer to the bottom wall portion 11 than the first flange portion 15 in the rotation axis direction of the latch 20. Accordingly, for example, the vehicle latch device 1 can be downsized in the direction of the rotation axis as compared with a structure in which the latch is arranged on the opposite side of the bottom wall portion from the first flange portion in the direction of the rotation axis of the latch. It has become.

A portion of the first flange portion 15 between the first bolt B1 and the latch 20 is formed so as to extend in the radial direction of the first bolt B1, and overlaps the first bolt B1 and the latch 20 when viewed from the radial direction. ing. Accordingly, a part of the first flange portion 15 (particularly, the first bolt B1 and the leg S1 is sandwiched with respect to the stress concentration portion SC that moves toward the first bolt B1 when the vehicle collides. Therefore, even a part of the first flange portion 15 can restrict the deformation of the stress concentration portion SC.

As shown in FIG. 2 and FIG. 3A, the latch-side engagement member 30 is a member with which a locking ball 41 as an example of an engagement portion provided at the tip of the wire 40 is engaged. Is configured as a separate member and is fixed to the latch 20 by a rivet RV as an example of a first locking portion. Specifically, the latch-side engagement member 30 includes a plate-like first plate-like portion 31 that is orthogonal to the left-right direction, a second plate-like portion 32 that protrudes to the right from the rear end of the first plate-like portion 31, A rib portion 33 projecting rearward from the right end of the two plate-like portions 32 is provided.

The first plate-like portion 31 is formed in a substantially rectangular shape that is long in the vertical direction, and a hole 31a into which a rivet RV for fixing the first plate-like portion 31 to the latch body 21 is fitted is formed on the upper portion. Is formed. On the front upper side of the hole 31a of the first plate-like portion 31, an engagement piece 31b extending obliquely upward in the front direction is formed.

The engaging piece 31b is engaged with the side surface 21a of the latch main body 21 in the circumferential direction around the rivet RV. As a result, when the latch-side engagement member 30 is pulled rearward with the wire 40, the latch-side engagement member 30 and the latch 20 are rotated together by the engagement piece 31b being caught on the side surface 21a of the latch 20. It comes to move.

The second plate-like portion 32 is a portion to which the locking ball 41 is engaged, and in the locked posture, a holding recess 32a that is recessed substantially rearward, and a slide engagement portion 32b that extends obliquely downward and forward from the holding recess 32a. , A locking wall 32c as an example of a second locking portion extending forward from the lower end of the slide engaging portion 32b, and an extending wall 32d extending from the holding recess 32a to the rivet RV side are provided.

The holding recess 32a is engaged until the latch 20 rotates from the locked position to the third position between the locked position and the maximum tension position (the position in FIG. 4B, hereinafter also referred to as an intermediate position). The stop ball 41 is configured to be held. Here, the holding recess 32a refers to a portion in contact with the locking ball 41 in the locked posture.

Thus, until the latch 20 changes from the locked position to the midway position, the locking ball 41 rotates about the rotation shaft 20A of the latch 20, so that the force from the wire 40 is transmitted to the latch 20 well. Thus, the latch 20 can be largely rotated.

In particular, in the present embodiment, the latch 20 is configured to be disengaged from the rod-shaped portion 91 until the latch 20 changes from the locked posture to the midway posture, that is, while the locking ball 41 is held by the holding recess 32a. ing. More specifically, the shape and arrangement of the holding recess 32a, or the end of the sheath 42 that supports the wire 40 to be described later, so that the latch 20 is detached from the rod-shaped portion 91 before the latch 20 changes from the locked posture to the midway posture. The fixed position of the part is set as appropriate. As described above, while the locking ball 41 is held in the holding recess 32a, that is, while the force from the wire 40 is transmitted to the latch 20 well and the latch 20 rotates greatly, the latch 20 is detached from the rod-shaped portion 91. With this configuration, the latch 20 can be operated satisfactorily.

The surface of the holding recess 32a that engages with the locking ball 41 is connected to the surface of the slide engaging portion 32b that engages with the locking ball 41 without a step. Thereby, since the latching ball 41 moves smoothly from the holding recess 32a to the slide engagement portion 32b, the latch 20 can be smoothly rotated.

The slide engagement portion 32b is provided adjacent to the holding recess 32a and is formed to extend in a direction away from the rotation shaft 20A of the latch 20. Specifically, the slide engaging portion 32b is engaged with the locking ball 41 until the latch 20 is rotated from the midway posture to the maximum pulling posture, and the locking ball 41 is moved along the slide engaging portion 32b. It is comprised so that it may move in the direction away from the rotating shaft 20A. Thereby, since the force transmitted from the wire 40 to the latch 20 can be released, it is possible to suppress a large load from being applied to the vehicle latch device 1.

The locking wall 32c has a function of restricting the locking ball 41 from moving downward (in a direction away from the holding recess 32a) from the slide engagement portion 32b. In the present embodiment, when the latch 20 is in the maximum pulling posture, the locking ball 41 is set so as not to reach the locking wall 32c. However, the locking ball 41 is caused by disturbance such as elongation of the wire 40. Is likely to move below the slide engaging portion 32b, the locking wall 32c can prevent the locking ball 41 from being detached from the slide engaging portion 32b.

The rivet RV is provided on the opposite side of the holding recess 32a from the slide engagement portion 32b, more specifically, adjacent to the upper front side of the extended wall 32d when the latch 20 is in the locked position. The movement to the moving shaft 20A side is regulated. As a result, when the latch 20 in the locked posture is pulled by the wire 40, even if the locking ball 41 erroneously tries to move toward the rotating shaft 20A, the movement can be suppressed by the rivet RV. It is possible to operate well.

The extended wall 32d is inclined toward the downstream side in the pulling direction of the wire 40 from the rivet RV toward the holding recess 32a when the latch 20 is in the locked posture. As a result, even when the locking ball 41 is shifted from the holding recess 32a and engaged with the extending wall 32d in the locked posture, the locking ball 41 is inclined when the wire 40 is pulled. Since it can be moved to the holding recess 32a along the extended wall 32d, the latch 20 can be operated satisfactorily.

Further, the surface of the extended wall 32d that engages with the locking ball 41 is connected to the surface of the holding recess 32a that engages with the locking ball 41 without a step. As a result, the locking ball 41 smoothly moves from the extended wall 32d to the holding recess 32a, so that the wire 40 can be pulled smoothly.

As shown in FIGS. 3A and 3B, the second plate-like portion 32 is formed with a slit 32e for allowing the wire 40 to pass therethrough. Specifically, the slit 32e is formed so as to pass through the extension wall 32d, the holding recess 32a, the slide engagement portion 32b, and the locking wall 32c described above, bent from the middle of the locking wall 32c to the right side, and then to the right side. An opening is formed, and the wire 40 is inserted through the opening.

The rib portion 33 is erected along the right end of the second plate-like portion 32 from the opening end of the slit 32e. Accordingly, the rigidity of the second plate-like portion 32 in which the slit 32e is formed can be increased by the rib portion 33, so that the deformation of the second plate-like portion 32 can be suppressed and the latch 20 can be operated well. Is possible.

Further, the rib portion 33 is erected from the second plate-like portion 32 toward the rear side, that is, the side opposite to the side where the locking balls 41 of the second plate-like portion 32 are arranged. Thereby, since the movement of the locking ball 41 is not disturbed by the rib portion 33, the locking ball 41 can be moved smoothly and the latch 20 can be operated well.

The wire 40 is a member for rotating the latch 20 by pulling the latch 20 via the latch-side engagement member 30, and a locking ball 41 is provided at one end, and the other end is not shown. It is connected to the operation lever. The wire 40 is slidably supported by a cylindrical sheath 42, and the end of the sheath 42 on the side of the locking ball 41 is supported by a bracket (not shown) provided on the vehicle seat S.

The locking ball 41 is configured to be movable along a plane orthogonal to the rotation axis 20A of the latch 20 by the wire 40 being supported so as to be movable by the slit 32e. As a result, the vehicle latch device 1 can be reduced in size in the direction of the rotation axis, for example, compared to a structure in which the locking ball moves in the direction of the rotation axis.

Next, the operation of each member will be described.
As shown in FIGS. 4A and 4B, when the latch 20 rotates from the locked position to the midway position, the rotation shaft of the latch 20 remains with the locking ball 41 held by the holding recess 32a. By rotating about 20A, the latch 20 is largely rotated and detached from the rod-shaped portion 91.

As shown in FIGS. 4B and 4C, when the latch 20 rotates from the midway posture to the maximum pulling posture, the locking ball 41 slides on the slide engagement portion 32b from the rotation shaft 20A. By escaping away, the amount of tension of the wire 40 can be earned while keeping the amount of rotation of the latch 20 small. Therefore, it is possible to suppress a large load from being applied to the wire 40 and the vehicle latch device 1 due to the pulling of the wire 40 while suppressing the latch 20 from interfering with the base plate 10.

Finally, the effect of the first bolt B1 at the time of vehicle collision will be described.
As shown in FIGS. 5A, 5B, and 6, when the vehicle collides, the stress concentration portion SC is preferentially deformed over other parts, and the deformation is regulated by the first bolt B1. . Further, the latch 20 that moves with the deformation of the stress concentration portion SC is stopped by contacting the stress concentration portion SC.

Therefore, it is possible to prevent the engagement state between the latch 20 and the rod-shaped portion 91 from being changed due to the deformation of the base plate 10 at the time of vehicle collision.

As described above, according to the present embodiment, in addition to the effects described above, the following effects can be achieved.
By using the first bolt B1 as a regulating member that regulates deformation of the stress concentration portion SC, for example, an increase in the number of parts can be suppressed compared to a structure in which the regulating member and the first bolt are provided separately. The latch device 1 can be downsized.

Since only one latch-side engagement member 30 is required between the latch 20 and the wire 40, the vehicle latch device 1 can be simplified.

Since the latch-side engagement member 30 is a separate member from the latch 20, the vehicle can be used for various types of vehicles by simply attaching the latch-side engagement member 30 having a different shape to the latch 20 according to the type of vehicle. Without changing the structure other than the latch side engaging member 30 of the latch device 1, the movement amount of the locking ball 41 of the wire 40 can be freely adjusted, and the load on the vehicle latch device 1 due to the wire 40 being pulled Can be suppressed.

Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below.

In the above-described embodiment, the vehicle latch device 1 is applied to the leg S1 of the vehicle seat S such as a vehicle. However, the vehicle latch device may be provided on the seating portion or the backrest of the vehicle seat S. It can also be used as a device for locking an opening / closing part such as a trunk of a vehicle. In this case, the member that fastens the base plate may be, for example, a frame that constitutes the seating portion. The vehicle seat S may also be a ship or airplane seat other than a vehicle.

In the above-described embodiment, a part of the latch 20 is disposed closer to the bottom wall 11 than the first flange 15 in the rotation axis direction of the latch 20. It may be arranged on the side.

In the above-described embodiment, the first bolt B1 is illustrated as an example of the restricting member. However, the restricting member may be, for example, a member dedicated to restriction that is fixed to the base plate.

In the above embodiment, the holding recess 32a is formed by recessing the second plate-like portion 32. However, the present invention is not limited to this, and for example, as shown in FIG. May be adjacent to each other (corner) between the second plate-like portion 132 and the rivet RV as a holding recess 132a.

In the above-described embodiment, the wire 40 is exemplified as an example of the pulling member, but the pulling member may be formed by, for example, connecting a plurality of rods so as to be rotatable.

In the embodiment, the locking ball 41 is illustrated as an example of the engaging portion, but the engaging portion may be formed in a columnar shape, for example.

In the above embodiment, the latch side engagement member 30 which is a member different from the latch 20 is illustrated as an example of the latch side engagement portion, but the latch side engagement portion may be formed integrally with the latch.

In the above embodiment, the rivet RV is exemplified as an example of the first locking portion, but the first locking portion may be a wall formed integrally with the extended wall, for example.

In the embodiment, the surface that engages with the engaging portion of the holding recess and the surface that engages with the engaging portion of the slide engaging portion and the extending wall are connected without any step. The engaging surface may intersect with a surface that engages with an engaging portion such as a slide engaging portion.

In the above-described embodiment, the latch 20 is configured to be disengaged from the rod-shaped portion 91 before the latch posture is changed to the intermediate posture. It may be configured.

Claims (19)

A vehicle latch device that engages or disengages from a rod-shaped portion,
A latch engageable with the rod-shaped part;
A base plate having a stress concentration portion configured to support the latch so as to be rotatable and to be deformed by concentration of stress at the time of collision;
A vehicle latch device comprising: a regulating member that is provided in the vicinity of the stress concentration portion and restricts deformation of the stress concentration portion at the time of a collision. 2. The vehicle latch device according to claim 1, wherein the restricting member is a first fastening member for fastening the base plate to another member. 3. The vehicle latch device according to claim 1, wherein the pivot shaft of the latch is disposed on a side opposite to the regulating member across the stress concentration portion in the base plate. . 4. The vehicle latch device according to claim 3, wherein the latch is provided in the vicinity of the stress concentration portion, and is configured to abut against the stress concentration portion and to restrict movement when a collision occurs. 5. . The latch includes a metal latch body and a resin cover that covers a part of the latch body,
The vehicle latch device according to claim 4, wherein the latch body is disposed so as to abut against the stress concentration portion at the time of a collision. The base plate includes a first wall on which the restriction member is provided, and a second wall disposed at a position farther from the other member than the first wall,
The stress concentration part is formed to connect the first wall and the second wall,
The height of the restriction member from the first wall is equal to or higher than the height of the stress concentration portion from the first wall. Vehicle latch device. 7. The vehicle latch device according to claim 6, wherein at least a part of the latch is arranged closer to the second wall than the first wall in a rotation axis direction of the latch. In addition to the first fastening member, the base plate further includes a second fastening member for fastening the base plate to the other member,
3. The vehicle latch device according to claim 2, wherein a distance from a rotation shaft of the latch to the first fastening member is smaller than a distance from the rotation shaft of the latch to the second fastening member. . The vehicle according to claim 8, wherein the base plate is formed with a circular hole for inserting the first fastening member and a long hole for inserting the second fastening member. Latch device. A pulling member for rotating the latch by pulling the latch;
A latch-side engagement portion that is provided on the latch and engages with an engagement portion that is provided at a tip of the pulling member;
The latch is pivotable between a first posture engaged with the rod-like portion and a second posture when the latch member is pulled out to the maximum while being detached from the rod-like portion,
The latch side engaging portion is
A holding recess for holding the engaging portion until the latch rotates to a third position between the first position and the second position;
A slide engagement portion provided adjacent to the holding recess and extending in a direction away from the rotation axis of the latch;
The engaging portion rotates around the rotation shaft while engaging with the holding recess until the latch rotates from the first posture to the third posture, and the latch is moved to the first posture. It is configured to move in a direction away from the rotation axis along the slide engagement portion while engaging with the slide engagement portion until the rotation from the third posture to the second posture. The vehicle latch device according to claim 1. 11. The vehicle latch device according to claim 10, wherein the latch side engaging portion is a separate member from the latch. 12. The vehicle latch device according to claim 10, wherein the engaging portion is configured to be movable along a plane orthogonal to the rotation axis. 11. A first locking portion for restricting movement of the engaging portion toward the rotating shaft is provided on the opposite side of the holding recess from the slide engaging portion. The vehicle latch device according to any one of claims 12 to 13. An extending wall extending from the holding recess toward the first locking portion,
The extending wall is inclined toward the downstream side in the pulling direction of the traction member as it goes from the first locking portion toward the holding recess when the latch is in the first posture. The vehicle latch device according to claim 13. The surface of the holding recess that engages with the engaging portion is connected to the surface of the slide engaging portion that engages with the engaging portion without any step. The vehicle latch device according to claim 1. The latch side engaging portion has a plate-like portion in which a slit for passing the pulling member is formed, and a rib portion standing from the plate-like portion. The vehicle latch device according to any one of 15. The vehicle latch device according to claim 16, wherein the rib portion is erected toward the opposite side to the engagement portion. The latch according to any one of claims 10 to 17, wherein the latch is configured to be disengaged from the rod-shaped portion during the period from the first posture to the third posture. Vehicle latch device. The second engagement portion that restricts the engagement portion from moving in a direction away from the holding recess is provided on the opposite side of the slide engagement portion from the holding recess. The vehicle latch device according to any one of claims 10 to 18.

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