JP6229472B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device, and more particularly to a vehicle seat slide device.

  Conventionally, there has been a seat slide device having a seat position memory function as a vehicle seat slide device. As the seat slide device, a lower rail and an upper rail, a lock member that restricts relative movement of the lower rail and the upper rail, a memory piece that is locked to the lower rail in conjunction with the forward tilting of the seat back, and an upper rail are provided. An apparatus comprising: a receiving portion capable of contacting the front portion of the piece; a bent portion provided on the upper rail and capable of contacting the rear portion of the memory piece; and a memory plate having a pressing portion for locking the memory piece to the lower rail. (Patent Document 1).

  Specifically, in this seat slide device, when the memory piece is detached from the lower rail, the memory piece is held by the receiving portion and the bending portion and moved in conjunction with the upper rail. When the memory piece is locked to the lower rail, the memory piece is locked to the lower rail by the pressing portion. This memory piece has a locking body including a locking pin (memory pin) protruding downward. In addition, a plurality of locking holes are arranged in parallel at predetermined intervals on the bottom wall portion of the lower rail. When the seat is moved forward and the restriction by the lock member is released, the locking pin is simultaneously moved downward. Thereby, the tip of the locking pin passes through the locking hole located on the lower side of the locking pin, and the memory piece is locked to the lower rail.

  Thereafter, when the seat is moved forward, the memory piece is maintained in a state of being locked by the pressing portion of the memory plate. As a result, the seat is moved forward with the memory piece remaining. When the seat is moved backward to return the seat to the original position, the receiving portion of the upper rail comes into contact with the front portion of the memory piece left at the original position (memory position). In this state, the lock claw of the lock member is inserted into the lock hole of the lower rail, and the relative movement of the lower rail and the upper rail is restricted. In this way, the seat (upper rail) can be returned to the original position.

JP 2008-247143 A

  In such a seat slide device, a clearance is set in the memory pin and the locking hole of the lower rail. That is, the inner diameter of the locking hole is designed to be larger than the outer diameter of the memory pin. Therefore, when the seat is returned to the original position, if the receiving portion of the upper rail contacts the front portion of the memory piece, the memory piece moves until the memory pin contacts the rear inner edge of the locking hole. The manner in which the relative position between the memory pin and the locking hole is thus shifted will be described with reference to Comparative Example 1.

  8A and 8B show a lock claw 1023 of the lock member and a lower rail lock hole 1035, and FIGS. 8C and 8D show a memory pin 1013 and a lower rail locking hole 1034. FIG. 8A and 8C show a state at the time of memory in which the memory pin 1013 is inserted into the locking hole 1034, and FIGS. 8B and 8D show a state at the time of return when the sheet is moved to the original position. In FIG. 8A, the center line of the lock claw 1023 at the time of memory is indicated by a one-dot chain line. In FIG. 8B, the center line of the lock claw 1023 at the time of memory is indicated by a one-dot chain line, and the center line of the lock claw 1023 at the time of return is indicated by a two-dot chain line.

  A gap due to a difference in clearance is generated between the memory pin 1013 and the locking hole 1034 in the memory state. In FIG. 8C, a gap d1 between the memory pin 1013 and the front inner edge of the locking hole 1034 and a gap d2 between the memory pin 1013 and the rear inner edge of the locking hole 1034 are generated. Thereafter, when the upper rail is moved backward to return the seat to the original position, the receiving portion of the upper rail comes into contact with the front portion of the memory piece. Then, the memory piece is pushed backward by the force F until it comes into contact with the rear inner edge of the locking hole. As a result, the upper rail and the memory piece move backward by a distance corresponding to the gap d2. Therefore, as shown in FIG. 8D, a gap d3 is formed between the memory pin 1013 at the time of return and the front inner edge of the locking hole 1034 by adding the gap d2 to the gap d1.

  On the other hand, the lock claw 1023 at the time of memory is detached from the lock hole 1035, and the restriction on the relative movement of the lower rail and the upper rail is released. Thereafter, when the upper rail is moved rearward in order to return the seat to the original position, the lock claw 1023 also moves rearward together with the upper rail. As a result, when the upper rail and the memory piece move backward by a distance corresponding to the gap d2, the lock claw 1023 also moves backward by the same distance d4 as the gap d2. Therefore, as shown in FIG. 8B, the relative position between the lock claw 1023 and the lock hole 1035 is displaced. As a result, the lock claw 1023 that has been displaced from the lock hole 1035 is prevented from being inserted into the lock hole 1035. As a result, the relative movement of the lower rail and the upper rail may not be restricted.

  If the upper rail moves further rearward in this state, the lock claw 1023 is inserted into the lock hole 1035 ′ different from the original lock hole 1035 (adjacent in the rear) as indicated by the arrow M. As a result, the sheet may not be returned to the original position.

  In order to solve this problem, it can be considered that the tip of the memory pin is tapered. The memory pin having the tapered tip will be described with reference to Comparative Example 2. 9A and 9B show the lock claw 2023 of the lock member and the lock hole 2035 of the lower rail, and FIGS. 9C and 9D show the memory pin 2013 and the locking hole 2034. 9A and 9C show a state at the time of memory in which the memory pin 2013 is inserted into the locking hole 2034, and FIGS. 9B and 9D show a state at the time of return when the sheet is moved to the original position.

  The memory pin 2013 of Comparative Example 2 has a tapered tip. The memory pin 2013 at the time of memory is inserted into the locking hole 2034 until the tip comes into contact with the inner edge of the locking hole 2034. Therefore, there is no gap between the memory pin 2013 and the locking hole 2034 as shown in FIG. 9C. As a result, there is no misalignment at the time of return due to the gap between the rear inner edge of the locking hole 2034 at the time of memory and the memory pin 2013. However, when the upper rail is moved backward to return the seat to the original position, the receiving portion of the upper rail comes into contact with the front portion of the memory piece. Then, the memory piece is pushed backward by the force F until it comes into contact with the rear inner edge of the locking hole 2034. As a result, the tapered surface of the memory pin 2013 comes into contact with the rear inner edge of the locking hole 2034. Here, when the upper rail is moved rearward with a large force, the taper surface of the memory pin 2013 may ride on the rear inner edge of the locking hole 2034. In this case, the memory pin 2013 moves obliquely upward toward the rear, and the memory piece moves rearward. Therefore, as shown in FIG. 9D, a gap d5 is generated between the memory pin 2013 at the time of return and the front inner edge of the locking hole 2034.

  On the other hand, the lock claw 2023 at the time of memory is detached from the lock hole 2035, and the restriction on the relative movement of the lower rail and the upper rail is released. Thereafter, when the upper rail is moved backward to return the seat to the original position, the lock claw 2023 also moves rearward together with the upper rail. As a result, when the upper rail and the memory piece move backward by a distance corresponding to the gap d5, the lock claw 2023 also moves backward by the same distance d6 as the gap d5. Therefore, as shown in FIG. 9B, the relative position between the lock claw 2023 and the lock hole 2035 is displaced. As a result, the lock claw 2023 that is displaced from the lock hole 2035 is prevented from being inserted into the lock hole 2035. As a result, the relative movement of the lower rail and the upper rail may not be restricted.

  Even in the case of a memory pin having a tapered tip, when the upper rail moves further rearward in this state, the lock claw 2023 differs from the original lock hole 2035 as indicated by the arrow M (adjacent in the rear). To be inserted into the lock hole 2035 '. As a result, the sheet may not be returned to the original position.

  In order to solve the above problems, a seat slide device as an example of the present invention includes a fixed rail fixed to a vehicle, a movable rail that holds a seat of the vehicle and is movable relative to the fixed rail. A lock member for restricting movement of the movable rail with respect to the fixed rail, and a state in which the lock rail is inserted into the lock hole in conjunction with the release of the restriction by the lock member and inserted into the lock hole And a memory pin that restricts movement of the movable rail, and is configured to be movably supported by the memory pin and to be inserted into the locking hole together with the memory pin when the memory pin is inserted. And at least one locking auxiliary member that comes into contact with the inner edge of the locking hole by insertion into the hole.

  As a result, the gap between the memory pin and the locking hole can be filled between the time of memory and the time of return, so that it is possible to prevent the relative position from being shifted. Therefore, since the shift of the relative position between the lock claw and the lock hole can be prevented, the sheet can be returned to the correct original position.

  Further features of the present invention will become apparent from the following description of embodiments, given by way of example with reference to the accompanying drawings.

It is a schematic side view which shows a sheet | seat. It is a schematic exploded perspective view showing a seat slide device. It is a schematic sectional drawing which shows the cross section which cut | disconnected the seat slide apparatus in the longitudinal direction. It is the schematic which shows the memory piece which concerns on 1st Embodiment. It is the schematic which shows the memory piece at the time of the memory which concerns on 1st Embodiment. It is a schematic sectional drawing which shows the VV cross section of the latching | locking part of the memory pin shown to FIG. 4A. FIG. 3 is a schematic exploded perspective view showing a locking portion of the memory pin according to the first embodiment. It is the schematic which shows the memory piece which concerns on 2nd Embodiment. It is the schematic which shows the memory piece at the time of the memory which concerns on 2nd Embodiment. 6 is a schematic view showing a lock claw at the time of memory according to Comparative Example 1. FIG. It is the schematic which shows the lock nail | claw at the time of the return which concerns on the comparative example 1. FIG. 6 is a schematic diagram showing memory pins in a memory according to Comparative Example 1. FIG. 6 is a schematic diagram showing a memory pin at return according to Comparative Example 1. FIG. It is the schematic which shows the lock nail | claw at the time of the memory which concerns on the comparative example 2. FIG. It is the schematic which shows the lock nail | claw at the time of the return which concerns on the comparative example 2. FIG. 10 is a schematic diagram showing memory pins in a memory according to Comparative Example 2. FIG. 10 is a schematic diagram showing a memory pin at return according to Comparative Example 2. FIG.

  Hereinafter, exemplary embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, dimensions, materials, shapes, relative positions of components, and the like described in the following embodiments are arbitrary and can be changed according to the configuration of the apparatus to which the present invention is applied or various conditions. In addition, unless otherwise specified, the scope of the present invention is not limited to the embodiments specifically described below. In the present specification, “up and down” corresponds to an upward direction and a downward direction in the direction of gravity, respectively. The direction on the front side of the vehicle is referred to as the front direction, and the direction on the rear side of the vehicle is referred to as the rear direction.

[First Embodiment]
FIG. 1 is a schematic side view of a vehicle seat 100 mounted on the front side of a vehicle such as an automobile. A lower rail 3 as a fixed rail extending in the front-rear direction of the vehicle is fixed to the floor surface 200 of the vehicle via a pair of front and rear brackets 9. An upper rail 4 as a movable rail that can move in the front-rear direction is attached to the lower rail 3 so as to be movable relative to the lower rail 3.

  The lower rail 3 and the upper rail 4 are arranged in pairs in the width direction orthogonal to the front-rear direction of the seat 100. A seat cushion 7 is fixed to the pair of upper rails 4. The seat cushion 7 is movable in the front-rear direction with respect to the lower rail 3 while being fixed to the upper rail 4. The movement of the upper rail 4 with respect to the lower rail 3 is regulated by a lock lever 22 described later. Therefore, the seat 100 is provided with a lock release handle 6 for releasing the restriction by the lock lever 22. Further, a seat back 8 is provided at the rear portion of the seat cushion 7 so as to be swingable around the rotation shaft 5. The seat back 8 can be moved forward to a forward inclined position indicated by a dotted line in FIG. 1 by operating an adjustment lever (not shown).

  Next, the seat slide apparatus 1 for vehicles is demonstrated based on FIG.2 and FIG.3. FIG. 2 is a schematic exploded perspective view of the seat slide device 1. FIG. 3 is a schematic cross-sectional view showing a cross section of the seat slide device 1 cut in the front-rear direction. The left and right lower rails 3 have the same structure, and the left and right upper rails 4 also have the same structure. Therefore, in the following description, the structure on the right side toward the front of the seat slide apparatus 1 will be described except when necessary.

  As shown in FIG. 2, the seat slide device 1 includes a lower rail 3 that is fixed to the vehicle, and an upper rail 4 that holds the vehicle seat 100 and is movable relative to the lower rail 3. The lower rail 3 has a bottom wall portion 32 extending in the front-rear direction (longitudinal direction), and a pair of side wall portions 31 extending upward from both ends in the width direction of the bottom wall portion 32. A folded wall portion 33 is formed at the tip of each side wall portion 31 so as to be folded inward in the width direction of the lower rail 3. Further, the upper rail 4 includes a lid wall portion 42 extending in the front-rear direction (longitudinal direction) and a pair of side wall portions 41 extending downward from both end portions in the width direction of the lid wall portion 42. . A folded wall portion 43 is formed at the tip of the side wall portion 41 so as to be folded toward the outside in the width direction.

  The lower rail 3 and the upper rail 4 have a substantially U-shaped cross-sectional shape, and are combined so that the opening sides of the lower rail 3 and the upper rail 4 abut each other. When combined, the folded wall portion 43 of the upper rail 4 is arranged inside the folded wall portion 33 of the lower rail 3. Thereby, the upper rail 4 is prevented from coming off in the upper direction of the lower rail 3.

  The lower rail 3 has a plurality of circular locking holes 34 arranged in the front-rear direction, and the locking holes 34 are formed in the bottom wall portion 32 at a predetermined interval. The lower rail 3 has a plurality of rectangular lock holes 35 arranged in the front-rear direction, and the lock holes 35 are formed in the folded wall portion 33 of the side wall portion 31 with a predetermined interval. On the other hand, the upper rail 4 has a plurality of inner insertion holes 44 and outer insertion holes 45 arranged in the front-rear direction. The inner insertion hole 44 is formed in the side wall portion 41 with a predetermined interval, and the outer insertion hole 45 is formed in the folded wall portion 43 with a predetermined interval. The inner insertion hole 44 and the outer insertion hole 45 are formed by positioning with the lock hole 35 of the lower rail 3, and the lock claw 23 (to be described later) is passed through the inner insertion hole 44 and the outer insertion hole via the lock hole 35. It can be inserted into the hole 45. For example, in FIG. 2, each of the four inner insertion holes 44 and the outer insertion holes 45 is set so as to face any four lock holes 35 continuously arranged in the front-rear direction. Yes.

  A through hole 46 is formed at a position corresponding to the inner insertion hole 44 and the outer insertion hole 45 at a connection portion between the side wall portion 41 and the lid wall portion 42. The pair of brackets 21 are fastened to the lid wall portion 42 of the upper rail 4 by rivets. Each bracket 21 is formed with a bearing piece in accordance with the positions of the front end and the rear end of the through hole 46. Each bearing piece has a hole into which a lock lever pin (not shown) is inserted. As a result, the bracket 21 supports a lock lever 22 as a lock member that restricts the movement of the upper rail 4 relative to the lower rail 3. The lock lever 22 is rotatably supported by the bracket 21 via a lock lever pin.

  The lock lever 22 has a plurality of lock claws 23 arranged at a predetermined interval in the front-rear direction. The lock claw 23 is formed so as to extend downward from the main body and be folded outward. When the movement of the upper rail 4 is restricted (locked state), the lock claw 23 is inserted into the outer insertion hole 45, the inner insertion hole 44, and the lock hole 35 in this order. The lock claw 23 rotates around the lock lever pin as the release handle 6 is operated. Thereby, the lock claw 23 can be inserted into the outer insertion hole 45, the inner insertion hole 44 and the lock hole 35 to restrict the movement of the upper rail 4, or the lock claw 23 can be extracted from these to release the restriction. .

  A lock spring 24 is engaged with the lock lever 22. The lock lever 22 is always urged by the lock spring 24 so as to rotate toward the lock claw 23. Further, a force is transmitted to the lock lever 22 via a connecting rod 25 connected to the release handle 6. As a result, when the force for operating the release handle 6 is transmitted to the lock lever 22, the lock lever 22 rotates toward the outside of the lower rail 3 against the urging force of the lock spring 24. As a result, the lock claw 23 is extracted in this order from the lock hole 35, the inner insertion hole 44, and the outer insertion hole 45, and the locked state is released.

  Subsequently, as shown in FIG. 3, the memory piece 10 as a memory member is placed on the bottom wall portion 32 of the lower rail 3. The memory piece 10 includes a slider 11, a coil spring 12 (FIG. 4A) as urging means, and a memory pin 13. Further, the movement range of the memory piece 10 is limited by the front stopper pin 91 fixed to the bracket 9 in the forward movement. Further, in the rearward movement, the movement range of the memory piece 10 is limited by the rear stopper pin 30 fastened to the bottom wall portion 32 of the lower rail 3.

  The memory pin 13 is inserted into the locking hole 34 of the lower rail 3 in conjunction with the release of the restriction by the lock lever 22 and restricts the movement of the upper rail 4 while being inserted into the locking hole 34. The slider 11 has a width smaller than the distance between the side wall portions 41 of the upper rail 4 and is formed in a substantially block shape. The slider 11 is disposed in the internal space between the lower rail 3 and the upper rail 4, and can slide in the front-rear direction with respect to the bottom wall portion 32 of the lower rail 3. Further, a front contact portion 111 (FIG. 3) is provided at the front end portion of the slider 11, and a rear contact portion 112 is provided at the rear end portion of the slider 11. On the upper side of the rear contact portion 112, an inclined surface is formed so that the height decreases toward the rear.

  As shown in FIGS. 4A and 4B described later, the slider 11 houses a coil spring 12, and the memory pin 13 is inserted into the coil spring 12. The memory pin 13 includes a head 131 having a substantially quadrangular prism shape that matches the inner shape of the slider 11, and a locking portion 132 that protrudes downward from the head 131 and has a substantially quadrangular prism shape. The head portion 131 is placed on the coil spring 12, and the locking portion 132 is inserted into the coil spring 12.

  As shown in FIG. 3, a stopper bracket 47 having a locking wall portion 471 is fixed to the upper rail 4 arranged on the memory piece 10. The stopper bracket 47 has a claw-shaped holding portion 472, and the holding portion 472 has an inclined surface that is inclined downward toward the rear. Further, a memory holding bracket 48 is fixed to the upper rail 4 adjacent to the rear of the stopper bracket 47. When the memory pin 13 is not fixed to the lower rail 3, the holding portion 472 and the locking wall portion 471 sandwich the head 131 of the memory pin 13. Thereby, when the upper rail 4 moves forward, the memory piece 10 also moves forward together with the memory pin 13 held between the holding portion 472 and the locking wall portion 471.

  When the memory piece 10 comes into contact with the front stopper pin 91 and the forward movement is restricted, the rear side surface of the memory pin 13 is pressed against the inclined surface of the holding portion 472 by the further forward movement of the upper rail 4. As a result, the memory pin 13 moves downward against the urging force of the coil spring 12 by the holding portion 472. Here, at the position where the memory piece 10 contacts the front stopper pin 91, the memory pin 13 is positioned above the locking hole 34 of the lower rail 3. Therefore, when the memory pin 13 moves downward, the locking portion 132 at the tip of the memory pin 13 passes through the locking hole 34. Thereafter, when the upper rail 4 moves further forward, the upper surface of the head 131 of the memory pin 13 is pressed against the lower surface of the memory holding bracket 48. Thereby, the memory piece 10 is fixed to the bottom wall part 32 of the lower rail 3, and the movement to the front is controlled. That is, the upper rail 4 can move forward with the memory piece 10 left on the lower rail 3.

  Thereafter, when the upper rail 4 moves rearward, the rearward movement of the upper rail 4 relative to the lower rail 3 temporarily occurs when the locking wall portion 471 comes into contact with the front contact portion 111 of the memory piece 10 fixed to the lower rail 3. Regulated by At this time, since the head 131 of the memory pin 13 is located between the locking wall portion 471 and the holding portion 472, the memory pin 13 is moved upward by being biased by the coil spring 12. As a result, the locking portion 132 comes out of the locking hole 34, and the memory piece 10 is released from being fixed. When the upper rail 4 further moves rearward, the memory piece 10 moves rearward together with the memory pin 13 held between the holding portion 472 and the locking wall portion 471.

  The upper rail 4 has a support bracket 49 fixed to the upper surface of the lid wall portion 42. A release lever 81 is rotatably connected to the support bracket 49. The release lever 81 rotates forward (counterclockwise in FIG. 3) in conjunction with the forward tilt of the seat back 8. As the release lever 81 rotates, the front end portion of the release lever 81 comes into contact with the lock lever 26 (FIG. 2). Accordingly, the front end portion of the release lever 81 pushes and rotates the lock lever 26, and the locked state by the lock lever 26 can be released. In the state where the seat back 8 is raised, the release lever 81 is constantly urged in a direction away from the lock lever 26 by urging means (not shown).

  An operation lever 82 of the memory piece 10 is rotatably connected to an intermediate portion in the longitudinal direction of the support bracket 49. The operation lever 82 is connected to the release lever 81 via a link member 83. Then, the operating lever 82 rotates forward (counterclockwise direction in FIG. 3) in conjunction with the rotation of the release lever 81. Therefore, the operation lever 82 rotates forward in conjunction with the forward tilting of the seat back 8. Then, as the operation lever 82 rotates, the front end portion of the operation lever 82 comes into contact with the head 131 of the memory pin 13. Accordingly, when the front end portion of the operation lever 82 moves the memory pin 13 downward, the locking portion 132 of the memory pin 13 passes through the locking hole 34 of the lower rail 3. Thereafter, when the upper rail 4 moves forward, the upper surface of the head 131 of the memory pin 13 is pressed against the lower surface of the memory holding bracket 48. As a result, the memory piece 10 is fixed to the bottom wall portion 32 of the lower rail 3 and its forward movement is restricted.

  That is, the memory piece 10 is fixed to the lower rail 3 in conjunction with the forward movement of the seat back 8. At the same time, as the release lever 81 rotates, the locked state by the lock lever 26 is also released. Accordingly, the upper rail 4 can move forward in a state where the memory piece 10 remains on the lower rail 3, that is, in a state where the memory pin 13 and the memory piece 10 are at the memory position. At this memory position, the movement of the memory piece 10 is restricted by the memory pin 13 inserted into the locking hole 34. Therefore, the backward movement of the upper rail 4 is limited by the memory pin 13.

  Thereafter, when the upper rail 4 moves rearward, the rear end of the locking wall portion 471 of the upper rail 4 comes into contact with the front contact portion 111 of the memory piece 10, and the rearward movement of the upper rail 4 is temporarily restricted. Thereby, the upper rail 4 returns to the original position (memory position) before moving forward. When the seat back 8 is raised at this original position, the pressing of the lock lever 26 by the release lever 81 is released. Therefore, the lock claw 23 of the lock lever 26 is inserted into the lock hole 35 of the lower rail, and the movement of the upper rail 4 is restricted at the original position. In this way, the seat 100 (upper rail 4) can be returned to the original position.

  Furthermore, the memory piece 10 according to the first embodiment will be described with reference to FIGS. 4A, 4B, 5 and 6. FIG. 4A shows a state in which the locking portion 132 of the memory pin 13 is positioned on the locking hole 34 of the lower rail 3. FIG. FIG. 4B shows a state in which the locking portion 132 at the time of memory is inserted into the locking hole 34.

  The memory piece 10 is movably supported by the memory pin 13 and is configured to be inserted into the locking hole 34 together with the memory pin 13 when the memory pin 13 is inserted. 15 Furthermore, the locking auxiliary members 14 and 15 abut on the upper inner edge of the locking hole 34 by being inserted into the locking hole 34. Further, the memory pin 13 has a locking portion 132 that is inserted into the locking hole 34. The locking auxiliary members 14 and 15 have a tapered shape and are supported by the locking portion 132 so as to be movable in the extending direction (vertical direction) of the locking portion 132. The memory piece 10 according to the first embodiment includes the front side locking auxiliary member 14 disposed on the front side of the memory pin 13 in the movement direction of the upper rail 4 and the movement of the upper rail 4 as the locking auxiliary member (wedge member). And a rear side locking auxiliary member 15 disposed on the rear side of the memory pin 13 in the direction.

  The front side locking auxiliary member 14 and the rear side locking auxiliary member 15 are arranged at positions where they can be inserted into the locking holes 34 of the lower rail 3. In addition, an inclined surface that is continuously inclined is formed as a tapered shape on the front surface of the front locking auxiliary member 14. Similarly, an inclined surface that is continuously inclined is formed as a tapered shape on the rear surface of the rear side locking auxiliary member 15. Thereby, the front side latching auxiliary member 14 and the rear side latching auxiliary member 15 have a taper shape which tapers as it goes below.

  Further, the memory piece 10 includes an elastic member 16 that biases the front side locking assisting member 14 and the rear side locking assisting member 15 toward the locking hole 34. The elastic member 16 always pushes down the front side locking assisting member 14 and the rear side locking assisting member 15 in the direction from the head 131 toward the locking hole 34. Further, the front end of the front side locking auxiliary member 14 and the rear side auxiliary locking member 15 are brought into contact with the front end of the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 at the front end portion of the memory pin 13 to prevent the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 from falling off. A flange 17 is provided as a drop-off restricting portion. The flange 17 is disposed at the front end portion (lower end portion) of the memory pin 13 in order to prevent the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 from falling off. With these configurations, when the locking portion 132 is inserted into the locking hole 34, the front locking auxiliary member 14 and the rear locking auxiliary member 15 are located between the locking portion 132 and the locking hole 34. Inserted to fill the gap.

  In other words, when the memory piece 10 is fixed to the lower rail 3, the front locking auxiliary member 14 and the rear locking auxiliary member 15 are inserted into the gap between the locking portion 132 and the locking hole 34. . That is, when the memory pin 13 is fixed at the memory position, an operation of moving the seat back 8 forward in the state shown in FIG. 4A is performed. As a result, the front end portion of the operating lever 82 (FIG. 3) abuts on the head 131 of the memory pin 13. When the front end of the operating lever 82 moves the memory pin 13 downward by the force indicated by the arrow I, the locking portion 132 of the memory pin 13 penetrates the locking hole 34 of the lower rail 3 as shown in FIG. 4B. To do. At this time, a gap due to the clearance between the locking portion 132 and the locking hole 34 is generated. Then, the front locking assisting member 14 is inserted into the gap d1 between the front inner edge of the locking hole 34 and the locking portion 132 by being urged by the elastic member 16. Further, the rear side locking assisting member 15 is inserted into the gap d2 between the rear inner edge of the locking hole 34 and the locking portion 132 by being urged by the elastic member 16.

  In memory, the gap between the memory pin 13 and the locking hole 34 can be filled. As a result, even when a force directed backward from the upper rail 4 is applied to the memory member 10 at the time of return, the movement of the memory piece 10 due to the gap can be prevented. Thereby, it is possible to prevent the relative position between the memory pin 13 and the locking hole 34 from being shifted between the time of memory and the time of return. Therefore, since the shift of the relative position between the lock claw 23 and the lock hole 35 can be prevented, the sheet 100 can be returned to the correct original position.

  In addition, the front side latching auxiliary member 14 and the rear side latching auxiliary member 15 have the same length. However, the length at which the front locking auxiliary member 14 is inserted into the locking hole 34 and the length at which the rear locking auxiliary member 15 is inserted into the locking hole 34 may differ depending on the distance of the gap. . Even if one of the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 is not inserted into the locking hole 34, the gap can be filled if the other is inserted into the locking hole 34. Therefore, compared with the case where the shape of the latching | locking part 132 is formed in a taper shape, the taper angle of the front side latching auxiliary member 14 and the rear side latching auxiliary member 15 can be set to a steep angle. As a result, even when a large rearward force is applied to the memory piece 10 at the time of return, the memory pin 13 can be prevented from riding on the locking hole 34.

  The front locking assisting member 14 has a protrusion 141, and the rear locking assisting member 15 has a protrusion 151. The memory piece 10 includes a guide portion 18 that guides the front side locking assisting member 14 and the rear side locking assisting member 15, and the protruding portion 141 and the protruding portion 151 are inserted into the guiding portion 18. . That is, as shown in FIG. 5 showing the VV cross section of FIG. 4A, guide portions 18 each having a substantially T-shaped cross section are formed at the front and rear portions of the locking portion 132. Then, the front locking auxiliary member 14 and the rear locking auxiliary member 15 are inserted into a guide portion 18 formed on the memory pin 13. Furthermore, as shown in FIG. 6, the guide portion 18 extends in the vertical direction and opens at the lower end of the locking portion 132. And the front side latching auxiliary member 14 has the protrusion 141 in the both ends in the width direction orthogonal to an up-down direction, and the protrusion 141 is extended in the up-down direction. Similarly, the rear side locking auxiliary member 15 also has protrusions 151 at both ends in the width direction, and the protrusions 151 extend in the vertical direction. And the protrusion 141 and the protrusion 151 are inserted in the guide part 18 so that the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 can slide up and down with respect to the locking part 132. .

  After the front locking auxiliary member 14 and the rear locking auxiliary member 15 are attached to the locking part 132, the flange 17 is attached to the lower end of the locking part 132. The flange 17 has a size larger than the outer diameter of the lower end portion of the locking portion 132 so as to overlap at least the opening on the lower end side (front end side) of the guide portion 18. Thereby, it is possible to prevent the front side locking auxiliary member 14 and the rear side locking auxiliary member 15 from falling off from the locking portion 132.

  In addition, the front side latching auxiliary member 14 and the rear side latching auxiliary member 15 can be formed, for example with iron. The elastic member 16 is, for example, a cylindrical rubber. The flange 17 is, for example, an iron plate member, and is bonded or welded to the lower end of the locking portion 132. The flange 17 is not limited to a plate member, and may be a bar member or the like as long as it overlaps the lower end opening of the guide portion 18. Also, separate flanges 17 can be attached to the front guide portion 18 and the rear guide portion 18, respectively.

  Next, the memory piece 200 according to the second embodiment will be described with reference to FIGS. 7A and 7B. In the description of the second embodiment, differences from the first embodiment will be described, the same reference numerals will be given to the components described in the first embodiment, and description thereof will be omitted. Except where specifically described, the constituent elements having the same reference numerals perform substantially the same operations and functions, and the effects thereof are also substantially the same.

  In the first embodiment, the front locking auxiliary member 14 and the rear locking auxiliary member 15 have tapered surfaces that are continuously inclined as tapered shapes. On the other hand, in the second embodiment, the front side locking assisting member 214 and the rear side locking assisting member 215 are tapered so that they are stepped toward the front ends of the front side locking assisting member 214 and the rear side locking assisting member 215, respectively. It has a staircase shape that tapers.

  That is, a stepped shape is formed on the front surface of the front locking assisting member 214 and the rear surface of the rear locking assisting member 215 in a stepwise manner. For example, as shown in FIG. 7A, the front side locking assisting member 214 and the rear side locking assisting member 215 have staircase shapes having different thicknesses in the front-rear direction. Thereby, both the front side latching auxiliary member 214 and the rear side latching auxiliary member 215 have a shape which tapers as it goes below. In addition, a substantially vertical plane extending in the up-down direction is formed on the front side of each step of the staircase shape in the front locking auxiliary member 214. Similarly, a substantially vertical flat surface extending in the up-down direction is formed on the rear side of each step of the staircase shape in the rear locking auxiliary member 215.

  The front side locking auxiliary member 214 and the rear side locking auxiliary member 215 according to the second embodiment are also arranged between the locking portion 132 and the locking hole 34 when the memory piece 200 is fixed to the lower rail 3. Inserted in the gap. That is, when the memory pin 13 is fixed at the memory position, the operation of moving the seat back 8 forward is performed in the state shown in FIG. 7A. As a result, the front end portion of the operating lever 82 (FIG. 3) abuts on the head 131 of the memory pin 13. Then, when the front end portion of the operating lever 82 moves the memory pin 13 downward by the force indicated by the arrow I, the locking portion 132 penetrates the locking hole 34 of the lower rail 3 as shown in FIG. 7B. At this time, a gap due to the clearance between the locking portion 132 and the locking hole 34 is generated. Then, the front side locking assisting member 214 is inserted into the gap between the front inner edge of the locking hole 34 and the locking portion 132 by being urged by the elastic member 16. Further, the rear side locking assisting member 215 is inserted into the gap between the rear inner edge of the locking hole 34 and the locking portion 132 by being urged by the elastic member 16.

  In memory, the gap between the memory pin 13 and the locking hole 34 can be filled. As a result, even when a force directed backward from the upper rail 4 is applied to the memory member 200 at the time of return, the movement of the memory piece 10 due to the gap can be prevented. Thereby, it is possible to prevent the relative position between the memory pin 13 and the locking hole 34 from being shifted between the time of memory and the time of return. Therefore, since the shift of the relative position between the lock claw 23 and the lock hole 35 can be prevented, the sheet 100 can be returned to the correct original position.

  Furthermore, a substantially vertical plane may be formed on the front surface of the front locking assisting member 214 and the rear surface of the rear locking assisting member 215 according to the second embodiment at a portion in contact with the inner edge of the locking hole 34. it can. As a result, even when a large rearward force is applied to the memory piece 200 at the time of return, the memory pin 13 can be more reliably prevented from getting on the locking hole 34.

  The present invention has been described above with reference to each embodiment. However, the present invention is not limited to the above embodiment. Inventions modified within the scope not departing from the present invention and inventions equivalent to the present invention are also included in the present invention. In addition, the above-described embodiments and modifications can be combined as appropriate without departing from the scope of the present invention.

  For example, in addition to the front side locking auxiliary member and the rear side locking auxiliary member, the locking auxiliary members can also be attached to both side surfaces in the width direction (direction orthogonal to the front-rear direction) of the locking portion. In this case, guide portions are formed on the both side surfaces, and a locking auxiliary member is attached to the guide portions on both side surfaces. Thereby, a memory pin can be inserted in the approximate center of a locking hole. Further, it is possible to prevent the memory pin from being displaced from the locking hole in the width direction. Therefore, the shift of the relative position between the lock claw and the lock hole in the width direction can be prevented.

  Furthermore, a protrusion as a guide part can be formed on the locking part, and a groove can be formed on the locking auxiliary member instead of the protrusion. For example, the locking part is formed in a substantially I-shaped cross section, and protrusions are formed on the front end and the rear end of the locking part, respectively. On the other hand, the front side locking assisting member and the rear side locking assisting member are formed with grooves for guiding the protrusions of the locking portions. That is, a protrusion having a shape complementary to the groove of the front side locking auxiliary member and the rear side locking auxiliary member is formed on the locking part. And the protrusion of a latching | locking part is inserted in the groove | channel of a front side latching auxiliary member and a rear side latching auxiliary member. Even in this case, the front side locking auxiliary member and the rear side locking auxiliary member can slide in the vertical direction with respect to the locking portion.

  Further, the elastic member can be constituted by a spring instead of rubber. Moreover, it can also comprise so that a front side locking auxiliary member and a rear side locking auxiliary member may be inserted in a locking hole with dead weight instead of providing an elastic member. Furthermore, the memory piece should just have at least one of the front side latching auxiliary member and the rear side latching auxiliary member. More preferably, the memory piece only needs to have at least a rear side locking auxiliary member.

  1: seat slide device, 3: lower rail, 4: upper rail, 10: memory piece, 13: memory pin, 14: front side locking auxiliary member, 15: rear side locking auxiliary member, 16: elastic member, 17: flange, 18: Guide part, 22: Lock lever, 23: Lock claw, 34: Locking hole, 35: Lock hole, 100: Seat, 131: Head, 132: Locking part, 141: Projection, 151: Projection , 200: memory piece, 214: front side locking auxiliary member, 215: rear side locking auxiliary member

Claims (7)

A fixed rail fixed to the vehicle;
A movable rail that holds the vehicle seat and is movable relative to the fixed rail;
A locking member for restricting movement of the movable rail with respect to the fixed rail;
A memory pin that is inserted into the locking hole of the fixed rail in conjunction with the release of the restriction by the locking member, and restricts the movement of the movable rail in a state of being inserted into the locking hole;
The memory pin is movably supported, and is configured to be able to be inserted into the locking hole together with the memory pin when the memory pin is inserted. A seat slide device comprising: at least one locking auxiliary member that comes into contact with the seat. The memory pin has a locking portion to be inserted into the locking hole,
The seat slide device according to claim 1, wherein the locking auxiliary member has a tapered shape and is supported so as to be movable in an extending direction of the locking portion.   The seat slide device according to claim 2, wherein the tapered shape is a shape that tapers in a stepwise manner toward a tip of the locking assisting member.   4. The seat slide device according to claim 1, wherein the locking auxiliary member is disposed on at least one of a front side and a rear side of the memory pin in a moving direction of the movable rail. 5.   The seat slide device according to any one of claims 1 to 4, further comprising an elastic member that biases the locking auxiliary member toward the locking hole.   The seat slide device according to any one of claims 1 to 5, wherein the memory pin includes a guide portion that guides the locking assisting member.   The seat slide according to any one of claims 1 to 6, further comprising a drop-out restricting portion that contacts a tip of the locking auxiliary member and prevents the locking auxiliary member from falling off at a tip end of the memory pin. apparatus.

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