JP6106551B2 - Latch device - Google Patents

Description

  The present invention relates to a 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 latch device on a leg or the like, and the latch device is fixed to the vehicle body by engaging with a striker fixed to the vehicle body. The lever for operating the latch device is provided at an appropriate location away from the latch device so that the user can easily operate it, and a pulling member such as a wire or a rod is provided between the lever and the latch device. The pulling member transmits the operation of the lever to the latch device.

  For example, Patent Document 1 discloses such a latch device. In this latch device, a latch that engages with a striker is operated by a ratchet, an open lever, and an operating lever, and a wire is engaged with the open lever. Then, the latch is opened and closed by pulling the wire with a lever or the like located away from the latch device.

  In this latch device, when the open lever is pulled with a wire, the open lever rotates, and this rotation is transmitted to the ratchet by engagement of a 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 on the latch device.

JP 2011-068262 A

  However, the configuration of Patent Document 1 has a problem that the latch device becomes complicated because many parts are provided between the latch and the wire.

  The present invention has been made in view of the background as described above, and an object thereof is to suppress a large load on the latch device with a simple configuration.

  Another object of the present invention is to reduce the size of the latch device and to operate the latch satisfactorily.

The present invention that solves the above-described problems is a latch device that engages or disengages from a rod-shaped portion, and includes a base member, a latch that is rotatably supported by the base member, and that can be engaged with the rod-shaped portion; A pulling member for rotating the latch by pulling the latch, and a latch-side engaging portion that is provided in the latch and engages with an engaging portion that is provided at a tip of the pulling member.
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, it is possible to suppress a large load from being applied to the 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 latch device can be simplified. Can do.

  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 latch device can be simplified as compared with the conventional latch device. Also, depending on the type of object to which the latch device is to be attached, the structure other than the latch side engagement portion of the latch device can be changed for various types of objects by simply attaching a latch-side engagement portion of a different shape to the latch. Without this, it is possible to freely adjust the amount of movement of the engaging portion of the traction member, and to suppress the load on the latch device due to the pulling of the traction member.

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

  According to this, the latch device can be downsized in the rotation axis direction compared to a structure in which, for example, 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 as it goes 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.

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

  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 part in which the slit is formed can be increased by the rib part, the deformation of the plate-like part can be suppressed and the latch can be operated favorably.

  Moreover, the above-mentioned structure WHEREIN: The said rib part may be erected toward the opposite side to the said engaging part.

  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 fully pulled, the second engaging portion can prevent the engaging portion from being disengaged from the slide engaging portion, so that the latch can be operated satisfactorily.

  According to the structure of Claim 1, it can suppress that a big load is applied to a latch apparatus with a simple structure.

  According to the structure of Claim 2, according to the kind of the object which attaches a latch apparatus, the moving amount of the engaging part of a traction member is changed, without changing structures other than the latch side engaging part of a latch apparatus. The load on the latch device due to the pulling of the traction member can be suppressed by adjusting freely.

  According to the structure of Claim 3, a latch apparatus can be reduced in size in the rotation axis direction.

  According to the configuration of the fourth aspect, when the latch that is in the first posture is pulled by the pulling member, the movement of the engaging portion toward the rotating shaft can be suppressed by the first locking portion. Can be operated satisfactorily.

  According to the configuration of the fifth aspect, since the engaging portion can be moved to the holding recess along the inclined extending wall when the pulling member is pulled, the latch can be operated satisfactorily.

  According to the configuration of the sixth aspect, since the engaging portion smoothly moves to the surface of the holding recess and the surface of the slide engaging portion connected to the surface without a step, the latch can be smoothly rotated. .

  According to the structure of Claim 7, since the rigidity of the plate-shaped part in which the slit was formed can be increased by the rib part, the deformation of the plate-shaped part can be suppressed and the latch can be operated satisfactorily. .

  According to the structure of Claim 8, since a rib part is standingly arranged toward the opposite side to an engaging part, an engaging part can be moved smoothly and a latch can operate | move favorably. it can.

  According to the ninth aspect of the present invention, the latch is released from the rod-like portion while the force from the pulling member is transmitted well to the latch and the latch is pivoted greatly, so that the latch can be operated satisfactorily.

  According to the configuration of the tenth aspect, the second locking portion can prevent the engaging portion from being disengaged from the slide engaging portion when the pulling member is pulled out. Can do.

It is a side view of a vehicle seat provided with a latch device. It is the side view which looked at the latch device from the inside. It is the disassembled perspective view (a) which decomposes | disassembles and shows a latch apparatus, and A arrow directional 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. It is II sectional drawing of FIG. 2, and is sectional drawing (a) which shows the state before a collision, and sectional drawing (b) which shows the state after a 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 latch device according to the present invention will be described with reference to the accompanying drawings. For example, as shown in FIG. 1, the latch device according to the embodiment is provided on a leg S <b> 1 of a vehicle seat S such as an automobile. The latch device 1 fixes the vehicle seat S to the floor F by engaging with a striker 90 fixed to the vehicle floor F, and releases the vehicle seat S from the floor F by detaching from the striker 90. It has become. 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 latch device 1 includes a base plate 10 as an example of a base member, a latch 20 that can be engaged with a rod-like portion 91 of a striker 90, and a latch side engagement as an example of a latch side engagement portion. A member 30 and a wire 40 as an example of a pulling member are provided.

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

  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 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. 5A, the first flange portion 15 is disposed at a position closer to the leg S1 than the bottom wall portion 11, and a circular hole 15a through which the first bolt B1 is inserted is provided at an appropriate position. Is formed. Here, the first bolt B1 is a bolt for fastening the first flange portion 15 to the leg S1, and the position of the circular hole 15a so that the first bolt B1 is disposed in the vicinity of the stress concentration portion SC. 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.

  Moreover, the height from the 1st flange part 15 of 1st volt | bolt B1 is more than the height from the 1st flange part 15 of the stress concentration part SC. 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.

  Returning to FIG. 3A, the second flange portion 16 is formed with a long hole 16 a through which the second bolt B <b> 2 (see FIG. 2) 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 rotating shaft 20A of the latch 20 to the first bolt B1 is configured to be smaller than the distance from the rotating 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 engagement 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.

  The rotation shaft 20A of the latch 20 is disposed on the opposite side to the first bolt B1 across the stress concentration portion 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, 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 latch device 1 can be downsized in the rotation axis direction compared to a structure in which the latch is disposed on the opposite side of the first flange portion from the bottom wall in the rotation axis direction of the latch. ing.

  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 engagement 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 to the latch 20 from the wire 40 can be released, it is possible to suppress a large load from being applied to the 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 extending 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 extending 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 32 e for passing the wire 40. 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.

  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 20 </ b> A of the latch 20 because the wire 40 is movably supported by the slit 32 e. Thereby, for example, the latch device 1 can be downsized in the rotation axis direction compared to a structure in which the locking ball moves in the rotation axis direction.

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 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 a vehicle collision.

As described above, according to the present embodiment, in addition to the effects described above, the following effects can be achieved.
Since only one latch-side engagement member 30 is required between the latch 20 and the wire 40, the latch device 1 can be simplified.

  Since the latch-side engagement member 30 is a separate member from the latch 20, the latch device can be used in 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. The amount of movement of the locking ball 41 of the wire 40 can be freely adjusted without changing the structure other than the one latch-side engagement member 30, thereby suppressing the load on the latch device 1 due to the wire 40 being pulled. it can.

  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 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 illustrated as an example of the pulling member. However, the pulling member may be formed by, for example, connecting a plurality of rods so as to be rotatable.

  In the embodiment, the latch device 1 is applied to the leg S1 of the vehicle seat S such as a vehicle. However, the latch device may be provided on the seating portion or the backrest of the vehicle seat S, such as a vehicle trunk. It can also be used as a device for locking the opening / closing portion of the. The vehicle seat S may also be a ship or airplane seat other than a vehicle. Furthermore, the latch device 1 can be used as a device for locking a thing other than a vehicle, for example, a door of a cupboard.

  In the above embodiment, the base plate 10 is illustrated as an example of the base member, but the base member may be a thick member. 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 engaging member 30 which is a member different from the latch 20 is illustrated as an example of the latch side engaging portion. However, the latch side engaging portion may be formed integrally with the latch.

  In the embodiment, the rivet RV is exemplified as an example of the first locking portion. However, the first locking portion may be a wall formed integrally with the extending 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. However, the latch is detached from the rod-shaped portion until the latch is changed from the intermediate posture to the maximum pulling posture. It may be configured.

DESCRIPTION OF SYMBOLS 1 Latch apparatus 10 Base plate 20 Latch 20A Rotating shaft 30 Latch side engaging member 32a Holding recessed part 32b Slide engaging part 40 Wire 41 Locking ball 90 Strike 91 Stick-shaped part

Claims (10)

A latch device that engages or disengages from a rod-shaped part,
A base member;
A latch rotatably supported by the base member and engageable with the rod-shaped portion;
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. A latch device characterized by the above.   The latch device according to claim 1, wherein the latch side engaging portion is a separate member from the latch.   3. The latch device according to claim 1, wherein the engaging portion is configured to be movable along a plane orthogonal to the rotation axis. 4.   The first locking portion for restricting the 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 latch device according to any one of claims 3 to 4. An extending wall extending from the holding recess toward the first locking portion,
The extension wall is inclined toward the downstream side in the tensile direction from the first locking portion toward the holding recess when the latch is in the first posture. Item 5. The latch device according to Item 4.   6. 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 latch device according to claim 1.   The said latch side engaging part has the plate-shaped part in which the slit for letting the said traction member pass is formed, and the rib part standingly arranged from the said plate-shaped part, The Claims 1- Claim characterized by the above-mentioned. The latch device according to any one of 6.   The latch device according to claim 7, wherein the rib portion is erected toward a side opposite to the engagement portion.   The said latch is comprised so that it may remove | deviate from the said rod-shaped part before it becomes the said 3rd attitude | position from the said 1st attitude | position, The Claim 1 characterized by the above-mentioned. 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 latch device according to any one of claims 1 to 9.

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