JP2013052843A - Vehicle seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat slide device that allows more appropriate durability to be set for a spring having a function of biasing a locking member for locking relative displacement of rails and a function of retaining an operation member, individually.SOLUTION: The vehicle seat slide device includes: a locking member 30 that selectively locks relative displacement between a lower rail 3 and an upper rail 4; a release handle 6 which is interlocked with the locking member 30, and is turned on a contact part in contact with a support wall part 22 provided in the upper rail 4 to transmit operational power for releasing the locked relative displacement; and a spring 41 having a first biasing part 45 that is fixed to the upper rail 4, extended in one direction from the fixed position and biases the locking member 30 to a side of locking the relative displacement, and a second biasing part 46 that is extended from the fixed position in the other direction to elastically hold the release handle 6 to come in contact with the support wall 22. The load to be applied to the first biasing part 45 is set to be smaller than that to be applied to the second biasing part 46.

Description

  The present invention relates to a vehicle seat slide device.

  Conventionally, as a vehicular seat slide device, what was indicated, for example in patent documents 1 is known. The vehicle seat slide device includes a lower rail (10), an upper rail (20) movably connected to the lower rail, and a locking member (31 disposed in a space formed between the lower rail and the upper rail. ). And by the urging force of the torsion bar (40), the movement of the upper rail with respect to the lower rail is locked by fitting the locking portion (32) provided on the locking member into the locked portion (11a) provided on the lower rail. Is done. Alternatively, the locking of the upper rail with respect to the lower rail is released by removing the locking portion from the locked portion against the biasing force of the torsion bar by the operating force of the operating member (50). The torsion bar is presumed to have a function of holding the operation member via the locking member when the operation force of the operation member is released. That is, the torsion bar has a function of urging the locking member so that the movement of the upper rail with respect to the lower rail is locked and a function of holding the operation member, and the same part is used mutually. .

International Publication No. 2007 / 129435A1 Pamphlet

  By the way, in patent document 1, if even one location of a torsion bar breaks, both above-mentioned functions will be influenced simultaneously. Therefore, it has also been proposed to make one spring independent before and after the coupling position with the upper rail, and to assign the function of holding the operating member and the function of urging the locking member to the front part and the rear part, respectively. Yes. However, no consideration has been given to the priority of the durability of these two independent functions.

  The object of the present invention is to more suitably set the durability of a single spring that independently has a function of urging the locking member so that the relative movement of both rails is locked and a function of holding the operation member. An object of the present invention is to provide a vehicle seat slide device that can be used.

  In order to solve the above problem, the invention according to claim 1 is characterized in that the first rail fixed to one of the vehicle floor and the seat, the first rail fixed to the other of the vehicle floor and the seat, A second rail connected to the first rail so as to be movable relative to the first rail, and a lock connected to the second rail so as to be rotatable, and selectively locking the relative movement of the first rail and the second rail. An operation force that releases the locking of the relative movement is transmitted by rotating a contact portion between the member and the supporting member that is linked to the locking member and that is provided on the second rail. An operating member, a first urging portion that is fixed to the second rail, extends in one direction from the fixed position, and urges the locking member toward the side that locks the relative movement, and the fixed position The operation member extends to the other side direction from the support wall portion And a single spring having a second urging portion that elastically holds so as to come into contact with the locking member until the locking member releases the locking of the relative movement. The gist is that the load applied to the first urging portion is set smaller than the load applied to the second urging portion at the rotation position of the operation member corresponding to the rotation position of the locking member. .

  According to this configuration, the first rail is rotated by rotating the locking member to the side that locks the relative movement of the first rail and the second rail by the biasing force of the first biasing portion. And the relative movement of the second rail is locked. On the other hand, due to the operating force of the operating member, the locking member is rotated to the side where the locking of the relative movement of the first rail and the second rail is released against the biasing force of the first biasing portion. By doing so, the locking of the relative movement of the first rail and the second rail is released. In these cases, the operation member is held so as to come into contact with the support wall portion by the urging force of the second urging portion. That is, the spring has a function of urging the locking member so that relative movement of the first rail and the second rail is locked, and the operation member is in contact with the support wall portion. It has an independent function of elastically holding the operating member.

  In particular, the load applied to the first biasing portion at the rotation position of the locking member until the locking member releases the locking of the relative movement corresponds to the rotation position of the locking member. It is always set smaller than the load applied to the second urging portion at the rotation position of the operating member. Basically, the stress generated in the first urging portion is also smaller than the stress generated in the second urging portion. For this reason, it is possible to suppress deterioration and breakage of the first urging portion relative to the second urging portion. Even if the spring is deteriorated or the like, it usually starts from the second urging portion, and the holding function of the operation member by the second urging portion is impaired. The Therefore, before the biasing function of the locking member toward the side for locking the relative movement by the first biasing portion is impaired, the user or the like can be made aware of the deterioration of the spring, etc. The possibility that the urging function is impaired can be reduced.

  According to a second aspect of the present invention, in the vehicle seat slide device according to the first aspect, the first urging portion and the second urging portion are locked in a circumferential direction centered on the fixed position. The distance from the fixed position to the position where the first urging portion urges the locking member is determined by urging the member and the operation member, and the second urging portion applies the operation member. The gist is that it is set longer than the distance from the fixed position of the position to be urged.

  According to this configuration, the load applied to the first urging portion can be made smaller than the load applied to the second urging portion by using an extremely simple method by setting the both distances.

  In the present invention, the durability of one spring having independently the function of urging the locking member and the function of holding the operation member so that the relative movement of both rails is locked is more preferably set. It is possible to provide a vehicle seat slide device capable of supporting the above.

The side view which shows typically one Embodiment of this invention. FIG. 4 is a transverse sectional view showing the same embodiment, and is a sectional view taken along line AA in FIG. (A) and (b) are the top view and side view which show the same embodiment. The perspective view which shows a spring. (A) (b) is a graph which shows the relationship between the displacement of a 1st biasing part and a 2nd biasing part, and load and stress.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a lower rail 3 as a first rail is fixed to the vehicle floor 2 in a manner extending in the front-rear direction, and an upper rail 4 as a second rail is attached to the lower rail 3. It is mounted so that it can move relative to the front and rear.

  The lower rail 3 and the upper rail 4 are arranged in pairs in the width direction (the direction orthogonal to the paper surface in FIG. 1), and here, the lower rail 3 and the upper rail 4 are arranged on the left side toward the front. The upper rails 4 are fixed and supported by a seat 5 that forms a seating portion for the occupant. The relative movement of the lower rail 3 and the upper rail 4 is basically in a locked state, and a release handle 6 is provided as an operation member for releasing the locked state.

  As shown in FIG. 2, the lower rail 3 is made of a plate material, and a first connection that connects a pair of first side wall portions 11 erected from both sides in the width direction and the base ends (lower ends) of the first side wall portions 11. It has a wall 12. A first folded wall portion 13 is continuously formed at the distal end (upper end) of each first side wall portion 11 so as to project inward in the width direction and be further folded back to the proximal end side of the first side wall portion 11.

  On the other hand, the upper rail 4 is formed by joining a substantially stepped plate material P1 and a substantially flat plate material P2 at their upper ends, and a pair of first rails extending in the vertical direction between the first folded wall portions 13 of the lower rail 3. 2 side wall part 14 and the 2nd connection wall part 15 which connects between the base ends (upper end) spaced apart from the lower rail 3 of these 2nd side wall parts 14 are provided. Then, the second folded wall portion 16 that protrudes outward in the width direction and is folded back so as to be surrounded by the first sidewall portion 11 and the first folded wall portion 13 at the tip (lower end) of each second sidewall portion 14. Are continuously formed.

  That is, the lower rail 3 and the upper rail 4 have U-shaped rail cross sections whose opening sides face each other, and are prevented from coming off in the vertical direction mainly by engaging with the first and second folded wall portions 13 and 16. Has been. The rail cross section formed by the lower rail 3 and the upper rail 4 is a so-called box shape having a rectangular shape. The lower rail 3 forms a space S in cooperation with the upper rail 4.

  As shown in FIGS. 3 (a) and 3 (b), a pair of front and rear rolling members 20 are mounted between each second folded wall portion 16 and the first side wall portion 11 opposed thereto, and the upper rail. 4 is a mode in which the rolling member 20 rolls between the lower rail 3 and is supported slidably in the longitudinal direction (front-rear direction) with respect to the lower rail 3.

  A plurality of rectangular lock holes 13a arranged in parallel in the longitudinal direction are formed at predetermined intervals at the base ends (upper ends) of the first folded wall portions 13 of the lower rail 3. These lock holes 13a open upward.

  A plurality of (three) through holes 14a, 14b, 14c arranged in parallel in the longitudinal direction are formed at the predetermined intervals in the longitudinal direction intermediate portion of both the second side wall portions 14 of the upper rail 4. Yes. These through holes 14 a to 14 c are opened in the width direction, and are arranged at positions that can match a plurality of (three) lock holes 13 a adjacent in the longitudinal direction of the lower rail 3.

  Furthermore, a plurality (three) of insertion grooves 16a arranged in parallel in the longitudinal direction are formed at the tips (upper ends) of the second folded wall portions 16 of the upper rail 4 with the predetermined interval. These fitting grooves 16a are opened upward and are arranged so as to face the through holes 14a to 14c in the width direction. These fitting grooves 16 a are arranged at positions that can match a plurality (three) of lock holes 13 a adjacent in the longitudinal direction of the lower rail 3.

  In addition, a pair of circular bearing holes 21 arranged in the width direction are disposed in front of the through holes 14 a to 14 c of both the second side wall portions 14 of the upper rail 4. The axes of these bearing holes 21 extend in the width direction. Also, the second side wall 14 side facing the space S is located at the front end of the second side wall 14 on one side of the upper rail 4 (the lower side in FIG. 3A and the plate material P2 side). A substantially square frame-shaped support wall portion 22 cut and raised in the width direction is formed.

Further, a pair of substantially square support holes 24 arranged in the front-rear direction between the bearing hole 21 and the support wall part 22 are formed in the second connection wall part 15 of the upper rail 4.
In the space S formed between the lower rail 3 and the upper rail 4, as shown in FIG. 3, a locking member 30 made of a plate material is arranged in a manner extending in the front-rear direction. The locking member 30 has a pair of vertical wall portions 31 erected upward from both edges in the width direction of the middle portion in the longitudinal direction. The distance in the width direction of both the vertical wall portions 31 is set to be smaller than the distance in the width direction of both the second side wall portions 14 of the upper rail 4, and the rear end portion is pivotally supported by the bearing hole 21. A pair of bottomed substantially cylindrical shaft portions 32 protrude outward in the width direction. The locking member 30 is rotatably connected to the upper rail 4 around an axis extending in the width direction by inserting and pivotally supporting both shaft portions 32 in the bearing holes 21.

  As shown in FIG. 3A, the input portion 33 that is reduced in front of both the vertical wall portions 31 of the locking member 30 and has a reduced width than the distance in the width direction of both the vertical wall portions 31 extends forward. Is formed. On the other hand, on the rear side of the vertical wall portions 31 of the locking member 30, a flat plate-shaped locking portion 34 extending rearward is formed. The locking portion 34 has a substantially rectangular main body portion 34a having a width smaller than the distance in the width direction of both the second side wall portions 14 of the upper rail 4, and on the outer side in the width direction of the rear end of the main body portion 34a. A plurality of projecting projections (three on each side, six in total) are provided. The locking claws 34b to 34d on each side are arranged in parallel in the longitudinal direction (front-rear direction) of the locking member 30 with the predetermined interval. The locking member 30 connected to the upper rail 4 is configured such that the main body portion 34a is disposed between the second side wall portions 14 and all the locking claws 34b to 34d are loosely inserted from the inside into the corresponding through holes 14a to 14c. The rotation around the shaft portion 32 is allowed.

  Then, as shown by a solid line in FIG. 2, when the locking member 30 is rotated around the shaft portion 32 so that the locking portion 34 is lowered, the locking claws 34 b to 34 d are inserted into the corresponding lock holes 13 a and the fittings. It can be inserted into the groove 16a. And when each latching claw 34b-34d fits in the corresponding lock hole 13a and the insertion groove 16a, between the through-holes 14a-14c and the insertion groove 16a in which the latching claw 34b-34d was inserted etc., the latching claw 34b By fitting .about.34d into the lock hole 13a, the relative movement of the lower rail 3 and the upper rail 4 is firmly locked.

  On the other hand, as shown by a two-dot chain line in FIG. 2, when the locking member 30 rotates around the shaft portion 32 so that the locking portion 34 rises, each locking claw 34 b to 34 d corresponds to the corresponding lock hole 13 a. It is set to deviate from etc. At this time, the locking of the relative movement of the lower rail 3 and the upper rail 4 is released.

  In the space S formed between the lower rail 3 and the upper rail 4, as shown in FIG. 3, a spring 41 made of one wire is arranged. The spring 41 is formed in a substantially U-shape that opens to the rear side in a plan view, and has a pair of extending portions 41a that are symmetrical and extend in the front-rear direction, and the front ends of both the extending portions 41a. It has the connection part 41b which connects between in the width direction.

  As shown in FIG. 4, the spring 41 has a front side fixing portion 42 formed by projecting the longitudinal intermediate portion of each extending portion 41 a upward, and each extending portion 41 a is disposed behind the front side fixing portion 42. The rear fixing portion 43 is formed by projecting upward. And the spring 41 forms the fastening part 44 in the site | part pinched between the front side fixing | fixed part 42 and the rear side fixing | fixed part 43 of both the extending parts 41a. Further, the spring 41 forms the first urging portion 45 at a site on the rear side of the rear fixing portion 43 of the both extending portions 41a, and from the front fixing portion 42 of the connecting portion 41b and the both extending portions 41a. The second urging portion 46 is formed at the front portion.

  As shown in FIG. 3, the spring 41 is positioned in the space S in such a manner that the front fixing portions 42 and the rear fixing portions 43 protrude from the pair of support holes 24, respectively. Thus, the first urging portion 45 is elastically brought into contact with the upper surface of the locking portion 34 on the rear side of the bearing hole 21 (shaft portion 32). That is, the first urging portion 45 is bent and deformed with the fixing position (rear side fixing portion 43) to the upper rail 4 as a fulcrum, and urges the locking member 30 in the circumferential direction around the fixing position. ing. Accordingly, the locking portion 34 of the locking member 30 is fitted into the locking hole 13a and the fitting groove 16a corresponding to the lowering side, that is, the locking claws 34b to 34d, by the spring 41 (first urging portion 45). Is biased to the side. The connecting portion 41b of the spring 41 is disposed between the support wall portion 22 and the front support hole 24 in the front-rear direction.

  The release handle 6 is formed by bending a cylindrical material, and is formed so as to bridge them in the width direction on the front side of both upper rails 4. The distal end portion 61 extending rearward of the release handle 6 has a substantially rectangular tube shape that is smaller than the opening width of the support wall portion 22. A slit extending in the width direction is formed on the bottom wall of the release handle 6. A support groove 62 is formed. Further, the end (rear end) of the front end portion 61 is crushed into a flat plate shape in the vertical direction to form a pressing portion 63.

  The release handle 6 is locked and prevented from being detached when the connecting portion 41 b of the spring 41 is fitted into the support groove 62 when each distal end portion 61 is inserted into the corresponding support wall portion 22 from the front side. At this time, each tip 61 is biased so as to be raised by the second biasing portion 46 in the support groove 62, thereby bringing the upper surface of the tip 61 into contact with the opposing inner wall surface of the support wall 22. Retained in a manner. That is, the second urging portion 46 is bent and deformed with the fixed position (front-side fixed portion 42) to the upper rail 4 as a fulcrum, and the distal end portion 61 (release handle 6) is moved in the circumferential direction around the fixed position. Energized. At this time, the pressing portion 63 is disposed above the input portion 33 of the locking member 30 with a gap. That is, the spring 41 also has a function of elastically holding the release handle 6 at a predetermined initial position so that the release handle 6 maintains a certain linked state with the locking member 30.

  When the distal end portion 61 of the release handle 6 rotates in the clockwise direction in the figure with a contact portion (hereinafter also referred to as “support point O1”) with the support wall portion 22 as a fulcrum, the engagement portion is pressed by the pressing portion 63. The stop member 30 rotates in the illustrated counterclockwise direction when the input portion 33 is lowered. As a result, the locking portion 34 of the locking member 30 rises against the urging force of the spring 41 (first urging portion 45), that is, the lock hole 13a to which each of the locking claws 34b to 34d corresponds. Move away from the side. The pivot point of the tip 61 (release handle 6) is set using the support wall portion 22 because the lever handle is used to operate the release handle 6 required for releasing the locking member 30. This is to balance the force and the operation amount. Needless to say, the rotation direction of the locking member 30 is reverse to the rotation direction of the release handle 6.

  Here, when the locking member 30 moves to the side where each locking claw 34 b to 34 d is disengaged from the corresponding lock hole 13 a or the like, the rear end of the spring 41 (first biasing portion 45) follows the locking member 30. Move to the ascending side. At this time, the front end of the spring 41 (second urging portion 46) moves to the lowering side following the release handle 6 linked to the locking member 30. Hereinafter, the displacements DL and DH in the height direction of the tips of the first and second urging portions 45 and 46 of the spring 41 at this time, and the loads LL of the first and second urging portions 45 and 46 corresponding to the displacements DL and DH respectively. , LH and stresses SL and SH will be described with reference to FIGS. 5A and 5B, scales D1 and D2 are attached to displacements DL and DH in the height direction common to the first and second urging portions 45 and 46 on the horizontal axis. On the other hand, the first and second urging portions 45 and 46 have the same interval on the vertical axis, and the loads LL and LH and stresses SL and SH common to the first and second urging portions 45 and 46 are provided. Are marked with a scale L1 and a scale S1, respectively.

  As can be seen from the figure, the change amount of the load LL with respect to the displacement DL of the first biasing portion 45 (that is, the gradient of the graph) is smaller than the change amount of the load LH with respect to the displacement DH of the second biasing portion 46. Is set. That is, the elastic coefficient KL accompanying the bending deformation of the first urging portion 45 is set to be smaller than the elastic coefficient KH accompanying the bending deformation of the second urging portion 46. This is mainly the extension length of the first urging portion 45 from the rear fixing portion 43 (distance from the fixing position with the upper rail 4 at the position where the first urging portion 45 urges the locking member 30). Is set longer than the extension length of the second urging portion 46 from the front-side fixing portion 42 (the distance from the fixing position with the upper rail 4 at the position where the second urging portion 46 urges the release handle 6). Is realized. The amount of change of the stress SL with respect to the displacement DL of the first urging portion 45 (that is, the gradient of the graph) is also set smaller than the amount of change of the stress SH with respect to the displacement DH of the second urging portion 46.

  Further, the minimum value LLm and the maximum value LLM of the load LL in the use range ZL of the first urging portion 45 related to the urging of the locking member 30 are the use of the second urging portion 46 related to the holding of the release handle 6. It is set smaller than the minimum value LHm and the maximum value LHM of the load LH in the range ZH. Then, the load LL applied to the first biasing portion 45 at the rotation position of the locking member 30 until the locking member 30 releases the locking of the relative movement is applied to the rotation position of the locking member 30. It is set smaller than the load LH applied to the second urging portion 46 at the corresponding rotational position of the release handle 6.

  Similarly, the minimum value SLm and the maximum value SLM of the stress SL in the use range ZL are set smaller than the minimum value SHm and the maximum value SHM of the stress SH in the use range ZH. The stress SL generated in the first biasing portion 45 at the rotation position of the locking member 30 until the locking member 30 releases the locking of the relative movement is the rotation position of the locking member 30. Is set smaller than the stress SH generated in the second urging portion 46 at the rotation position of the release handle 6.

Next, the operation of this embodiment will be described.
First, it is assumed that the operating force of the release handle 6 is released. At this time, each tip 61 urged / held by the spring 41 (second urging portion 46) in the support groove 62 is positioned in such a manner that its upper surface abuts against the opposing surface of the support wall portion 22. . And the press part 63 is arrange | positioned at the upper side of the input part 33 of the latching member 30 at intervals. Accordingly, the locking member 30 released from the distal end portion 61 (the release handle 6) is moved to the side where the locking portion 34 is lowered by the spring 41 (first biasing portion 45), that is, the locking claws 34b to 34d are It is urged | biased by the side inserted in the corresponding lock hole 13a and the insertion groove 16a. Thereby, the relative movement of the lower rail 3 and the upper rail 4 is firmly locked by the locking claws 34b to 34d being fitted into the corresponding lock holes 13a and the fitting grooves 16a. And the position of the front-back direction of the sheet | seat 5 supported by the upper rail 4 is hold | maintained.

  Here, it is assumed that the release handle 6 has been operated to lift its front end. At this time, each distal end portion 61 rotates to the side where the pressing portion 63 is lowered with the support point O1 as a fulcrum, thereby pressing the input portion 33 of the locking member 30 with the pressing portion 63. Accordingly, the locking member 30 corresponds to the side where the locking portion 34 rises around the shaft portion 32 against the biasing force of the spring 41 (first biasing portion 45), that is, the locking claws 34b to 34d. It pivots to the side away from the lock hole 13a. Thereby, each latching claw 34b-34d remove | deviates from the corresponding lock hole 13a etc., and the latching of relative movement of the lower rail 3 and the upper rail 4 is cancelled | released. And the position adjustment of the front-back direction of the sheet | seat 5 supported by the upper rail 4 is attained.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the spring 41 has a function of urging the locking member 30 so that the movement of the upper rail 4 with respect to the lower rail 3 is locked, and the release handle 6 (front end portion 61) is the support wall portion 22. The release handle 6 is elastically held so as to be in contact with the release handle 6 independently. In particular, the load LL applied to the first biasing portion 45 at the rotation position of the locking member 30 until the locking member 30 releases the locking of the movement corresponds to the rotation position of the locking member 30. It is always set to be smaller than the load LH applied to the second urging portion 46 at the rotation position of the release handle 6 to be performed. The stress SL generated in the first urging portion 45 is also smaller than the stress SH generated in the second urging portion 46. For this reason, it is possible to suppress the deterioration / breakage of the first urging portion 45 relative to the second urging portion 46. Even if the spring 41 deteriorates or the like, it usually starts from the second urging portion 46, and the function of holding the release handle 6 by the second urging portion 46 is impaired. Is done. Therefore, before the biasing function of the locking member 30 to the side for locking the movement by the first biasing portion 45 is impaired, the user or the like can be made aware of the deterioration of the spring 41 and the like. The possibility that the power function is impaired can be reduced.

  (2) In the present embodiment, the distance from the fixed position (rear side fixing portion 43) where the first urging portion 45 urges the locking member 30 is set, and the second urging portion 46 is the release handle 6 ( The load LL applied to the first urging portion 45 is set to a second value by using a very simple method of setting the position for urging the front end portion 61) longer than the distance from the fixed position (front side fixing portion 42). The load LH applied to the urging portion 46 can be made smaller. Even if the space in the front-rear direction of the spring 41 is limited within a certain range, the first urging force can be adjusted by adjusting and setting the length distribution of the first and second urging portions 45 and 46. The load LL applied to the portion 45 can be made smaller than the load LH applied to the second urging portion 46. Further, the stress SL generated in the first urging portion 45 can be made smaller than the stress SH generated in the second urging portion 46.

  (3) In the present embodiment, by providing one spring 41 with the two functions described above, it is possible to reduce the number of parts compared to, for example, providing these functions with individual springs.

  (4) In the present embodiment, the load LL applied to the first urging portion 45 is buffered by the rear side fixing portion 43, and the load LH applied to the second urging portion 46 is buffered by the front side fixing portion 42. The independence of the two functions can be maintained more reliably.

In addition, you may change the said embodiment as follows.
In the embodiment, the load LL applied to the first urging portion 45 at the rotation position of the locking member 30 until the locking member 30 releases the locking of the movement is the rotation of the locking member 30. If it is set to be smaller than the load LH applied to the second urging portion 46 at the rotational position of the release handle 6 corresponding to the moving position, the first and second urging portions 45, 46 are appropriately arranged. Adjust and set the relationship of spring torque. For example, while setting the elastic coefficient KL of the first urging unit 45 and the elastic coefficient KH of the second urging unit 46 to be equal, the above-described setting may be realized by adjusting only the respective use ranges ZL and ZH. .

  -In the said embodiment, you may employ | adopt the spring which consists of a leaf | plate spring. Even in this case, the first urging portion and the second urging portion may be disposed on the rear side and the front side across the fixing position with the upper rail 4.

  In the embodiment, a spring having first and second urging portions that generate urging force by tensile deformation, compression deformation, torsion deformation, etc. corresponding to the support structure of the locking member or the release handle, etc. is adopted. Also good.

  -In the said embodiment, the latching member connected with the upper rail 4 outside the space S so that rotation is possible may be sufficient. In this case, the axis of the locking member may extend in the front-rear direction (longitudinal direction of the upper rail 4), for example. Similarly, a release handle supported by the upper rail 4 outside the space S may be used.

-In the said embodiment, the fixed relationship (namely, vertical arrangement relationship) of the lower rail 3 and the upper rail 4, and the vehicle floor 2 and the sheet | seat 5 may be reverse.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

(A) a first rail fixed to either the vehicle floor or the seat;
A pair of side wall portions fixed to the other of the vehicle floor and the seat, connected to be movable relative to the first rail, and arranged side by side on both sides in the width direction, and a vehicle height direction on the first rail A second rail having a connection wall portion that connects between the base ends of the both side wall portions that are opposed to each other and spaced from the first rail;
It is disposed in a space formed between the first rail and the second rail, is pivotally connected to the second rail around an axis extending in the width direction, and is relative to the first rail and the second rail. A locking member for selectively locking movement;
By being inserted into the second rail in the longitudinal direction of the second rail and linked to the locking member, and rotating around a contact portion with a support wall provided on the second rail, An operation member for transmitting an operation force for releasing the locking of the relative movement;
A first urging portion fixed to the second rail, extending in one side direction from the fixed position, and urging the locking member toward the side locking the relative movement; and the other direction from the fixed position And a single spring having a second urging portion that elastically holds the operation member so as to abut against the support wall portion.
The load applied to the first urging portion at the rotation position of the locking member until the locking member releases the locking of the relative movement corresponds to the rotation position of the locking member. A vehicle seat slide device, wherein the vehicle seat slide device is set to be smaller than a load applied to the second urging portion at a rotation position of the operation member.

  2 ... Vehicle floor, 3 ... Lower rail (first rail), 4 ... Upper rail (second rail), 5 ... Seat, 6 ... Release handle (operating member), 22 ... Support wall, 30 ... Locking member, 41 ... Spring, 45 ... first biasing portion, 46 ... second biasing portion.

Claims (2)

A first rail fixed to either the vehicle floor or the seat;
A second rail fixed to the other of the vehicle floor and the seat and connected to the first rail so as to be relatively movable;
A locking member that is pivotally coupled to the second rail and selectively locks relative movement of the first rail and the second rail;
An operating member linked to the locking member and transmitting an operating force for releasing the locking of the relative movement by rotating around a contact portion with a support wall provided on the second rail as a fulcrum; ,
A first urging portion fixed to the second rail, extending in one side direction from the fixed position, and urging the locking member toward the side locking the relative movement; and the other direction from the fixed position And a single spring having a second urging portion that elastically holds the operation member so as to abut against the support wall portion.
The load applied to the first urging portion at the rotation position of the locking member until the locking member releases the locking of the relative movement corresponds to the rotation position of the locking member. A vehicle seat slide device, wherein the vehicle seat slide device is set to be smaller than a load applied to the second urging portion at a rotation position of the operation member. The vehicle seat slide device according to claim 1,
The first urging portion and the second urging portion respectively urge the locking member and the operation member in a circumferential direction around the fixed position.
The distance from the fixed position of the position where the first urging portion urges the locking member is longer than the distance from the fixed position of the position where the second urging portion urges the operation member. A vehicular seat slide device characterized by being set.

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