JP5488554B2 - Vehicle seat slide device - Google Patents

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. This vehicle seat slide device includes a lower rail (4), an upper rail (5) movably connected to the lower rail, and a locking member (3 disposed in a space formed between the lower rail and the upper rail. ). And by the urging force of the urging member (23), the locking portion (34) provided on the locking member is lowered so as to be fitted into the locked portion (41) provided on the lower rail, whereby the upper rail relative to the lower rail is Movement is locked. Alternatively, the movement of the upper rail with respect to the lower rail is released by lifting the locking portion so that the locking portion is released from the locked portion against the biasing force of the biasing member by the operating force of the operating lever (21).

JP 2003-252086 A

  By the way, when the locking member is arranged in the space formed between the lower rail and the upper rail as in Patent Document 1, if the rail cross section is enlarged in order to secure the arrangement space of the locking member, the material consumption is reduced. The cost and the mass increase accompanying the increase etc. are forced. On the other hand, in order to reduce the arrangement space required for the locking member, if the amount of movement when lifting the locking member so that the locking portion is removed from the locked portion is reduced, the movement locking of the upper rail with respect to the lower rail is released. Insufficient operation may deteriorate the operability.

  An object of the present invention is to provide a vehicle seat slide device that can further increase the amount of movement of a locking member when releasing the movement locking between rails without increasing the rail cross section. .

In order to solve the above problems, the invention according to claim 1, is fixed to the vehicle floor and hand of the vehicle seat, the first rail having a locked portion, the vehicle seat floor and the vehicle of which is fixed to the other side, the relative first rail and a second rail which is relatively movably coupled, a pair of side wall portions juxtaposed in a width direction perpendicular to the longitudinal direction of the second rail, and a second rail having a connecting wall portion connecting proximal ends of the both side wall portions apart from the disposed first rail so as to face the vehicle height direction to the first rail, the first rail and the disposed in a space formed between the second rail, a locking member coupled to rotatably the second rail about an axis extending in the width direction, the tip portion of the locking member a formed locking portion, the locking member into one direction The moving away from the connecting wall in accordance with the rotation engages the engaged portion to restrict the relative movement of the first rail and the second rail, the rotation of the other direction of the locking member Accordingly, it has a flat plate shape that releases the engagement with the locked portion while approaching the connecting wall portion and releases the restriction of relative movement of the first rail and the second rail, and has a tip portion , and and the locking portion having a notch surface facing the connecting wall on the rotational path of the locking member in said tip, in a direction in which the locking portion is engaged with the engaged portion A gist is provided with a biasing member that biases the locking member.

  According to this configuration, the first locking member is rotated in the direction (one side direction) in which the locking portion engages with the locked portion by the biasing force of the biasing member. The relative movement of the rail and the second rail is locked. On the other hand, the locking member is rotated in a direction (another side direction) in which the locking portion releases the engagement with the locked portion against an urging force of the urging member by an appropriate release operation force. By moving, the locking of the relative movement of the first rail and the second rail is released. At this time, since the locking portion approaches the connection wall portion, the amount of movement of the locking member until the locking portion releases the engagement with the locked portion is It is limited to a range until the stop portion comes into contact with the connecting wall portion. However, since the notch is formed in the front end portion of the locking portion that faces the connecting wall portion on the rotation locus of the locking member, the movement amount is increased accordingly. Can do. Thereby, the cancellation | release precision of the latching of the relative movement of a said 1st rail and a said 2nd rail can be raised, and operativity can be improved. Further, since it is not necessary to change the shape of the second rail or the like, there is no need to increase the rail cross section.

According to a second aspect of the present invention, in the vehicle seat slide device according to the first aspect, the second rail has a tip at a position approaching the first rail in the side wall portion , and the first rail is separated from the first rail. The second rail has a pair of folded wall portions that project outward in the width direction from the distal end of the side wall portion and fold back to the proximal end side of the side wall portion, the first rail Are arranged so as to face a pair of first side wall portions arranged side by side in the width direction and the second rail in the vehicle height direction, and are proximal ends of the first side wall portions spaced apart from the second rail. A first connecting wall portion that connects the first side wall portion and a second rail that protrudes inward in the width direction from a distal end of the first side wall portion close to the second rail, and is folded back to a proximal end side of the first side wall portion; A pair surrounded by the side wall and the folded wall A first folded wall portion, and the locked portion is disposed at a proximal end of the first folded wall portion, and a through hole formed in the side wall portion of the second rail; A fitting groove formed at the tip of the folded wall portion of the two rails, and the locking portion includes a main body portion disposed between the both side wall portions of the second rail, and an outer side in the width direction of the main body portion. It has a locking claw that protrudes into the through hole and is inserted into the through hole and can be inserted into the fitting groove, and the notch is formed in the main body.

  According to the same configuration, the relative movement of the first rail and the second rail is locked when the locking claw inserted through the through hole is inserted into the locked portion and the insertion groove. . At this time, the locking claw includes the inner wall surface of the through hole and the fitting groove on one side in the relative movement direction of the first rail and the second rail, and the locked portion on the other side in the relative movement direction. Shear stress is generated by receiving a load from the inner wall surface. In other words, the locking strength of the relative movement of the first rail and the second rail is dominated by the shear strength of the locking claws, and the influence of the main body is small. Therefore, since the notch is formed in the main body, it can be avoided that the locking strength of the relative movement of the first rail and the second rail is reduced by the notch.

According to a third aspect of the present invention, in the vehicle seat slide device according to the first or second aspect, the notch is engaged with the connection wall portion as the locking member rotates in the other direction. when the stopper portion is in contact, and the gist that it is form formed so as to contact the connecting wall and the surface.

  According to this configuration, when the locking portion comes into contact with the connecting wall portion as the locking member rotates in the other direction, the notch makes surface contact with the connecting wall portion at the notch. The load can be dispersed on the contact surface. Therefore, for example, the possibility that the engaging portion is deformed as in the case where a load is concentrated on the tip of the engaging portion that contacts the connecting wall portion can be reduced.

According to a fourth aspect of the present invention, in the vehicle seat slide device according to any one of the first to third aspects, the locking portion is lowered as the locking member rotates in one side direction. By doing so, the gist is that the relative movement of the first rail and the second rail is restricted by engaging with the locked portion.

  According to this configuration, for example, even if the locking member is not biased in a direction in which the locking portion engages with the locked portion due to a failure of the biasing member, the locking portion is By descending with its own weight, the locked state of relative movement of the first rail and the second rail can be maintained.

  An object of the present invention is to provide a vehicle seat slide device that can further increase the amount of movement of a locking member when releasing movement locking between rails without increasing the rail cross section. .

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. (A) is sectional drawing along the BB line of Fig.3 (a), (b) is sectional drawing which shows operation | movement of the embodiment. (A) and (b) are the perspective views and top views which show a locking member, (c) is a longitudinal cross-sectional view of (b).

  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 for releasing the locked state is provided.

  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 step-like plate material P1 and a substantially flat plate-like plate material P2 at their upper ends, and a pair of vertically extending between the first folded wall portions 13 of the lower rail 3. It has the 2nd side wall part 14 as a side wall part, and the 2nd connection wall part 15 as a connection wall part which connects between the base end (upper end) spaced apart from the lower rail 3 of these 2nd side wall parts 14. As shown in FIG. Then, the second side wall portion 14 has a tip (lower end) that extends outward in the width direction and is folded back so as to be surrounded by the first side wall portion 11 and the first folding wall portion 13. Two folded wall portions 16 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.

  At the base ends (upper ends) of both first folded wall portions 13 of the lower rail 3, a plurality of quadrangular locked portions 13a arranged in parallel in the longitudinal direction are formed at predetermined intervals. . 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, on the rear side of the support wall portion 22 of the second connecting wall portion 15 of the upper rail 4, as shown in FIGS. 4 (a) and 4 (b), a claw-like shape cut and raised downward toward the space S is formed. The stopper portion 23 is formed. Furthermore, a pair of substantially square support holes 24 arranged in parallel in the front-rear direction are formed in the second connecting wall portion 15 of the upper rail 4 on the front side of the bearing hole 21 and on the rear side of the stopper portion 23. ing.

  In the space S formed between the lower rail 3 and the upper rail 4, a locking member 30 made of a plate material is arranged in a manner extending in the front-rear direction. As shown in FIGS. 5A to 5C, the locking member 30 has a pair of vertical wall portions 31 erected upward from both end 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. As shown in FIG. 3, 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. 5, an input portion 33 is formed on the front side of the vertical wall portions 31 of the locking member 30 so as to be reduced in width and extend forward from the distance in the width direction of the vertical wall portions 31. ing. The front end of the input part 33 forms a substantially arcuate wall-like contact part 33a that protrudes upward. 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, total of six) are provided with locking claws 34b, 34c, 34d. 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. As shown in FIG. 3, the locking member 30 connected to the upper rail 4 has a body portion 34 a disposed between the second side wall portions 14, and all the locking claws 34 b to 34 d correspond to the corresponding through holes 14 a to 14 c. Rotation around the shaft portion 32 is allowed in such a manner that it is loosely inserted from the inside. The center of gravity of the locking member 30 is disposed on the rear side of the shaft portion 32.

  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 addition, as shown in FIG. 5, the front side restriction | limiting part 36 protruded on the outer side of the width direction relatively in the aspect which reduces the distance of the width direction of those rear sides is arrange | positioned at the front end of both the vertical wall parts 31 Has been. On the other hand, the main body part 34a is provided with a rear side restricting part 37 that protrudes to both outer sides in the width direction on the front side of the locking claw 34d. The both front-side restricting portions 36 and the two rear-side restricting portions 37 cooperate with each other by partially reducing the gap between the opposing surfaces of the second side wall portions 14 facing each other in the width direction. The positional deviation in the width direction is suppressed.

  Further, in the present embodiment, a notch 35 is formed in the rear end upper portion of the main body portion 34a which is the inner side in the width direction of both the locking claws 34b. The notch 35 forms an inclined surface such that the main body 34a gradually becomes thinner toward the rear. Then, as shown in FIG. 4, when the locking portion 34 comes into contact with the facing surface of the second connecting wall portion 15 with the rotation of the locking member 30 on the side where the locking portion 34 rises, The inclination angle is set so that the notch 35 comes into surface contact with the surface. This is because the amount of movement of the locking member 30 (hereinafter also referred to as “unlock stroke”) until the locking portion 34 (the locking claws 34b to 34d) releases the engagement with the lock hole 13a is at most. The range until the locking portion 34 abuts against the opposing surface of the second connecting wall portion 15 is limited, and the locking portion 34 facing the second connecting wall portion 15 on the turning trajectory of the locking member 30 is limited. This is because by forming the notch 35 at the rear end, the unlocking stroke is increased accordingly.

  In a space S formed between the lower rail 3 and the upper rail 4, as shown in FIG. 3, a torsion spring 41 made of one wire as an urging member is disposed. The torsion 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. It has the connection part 41b which connects between front ends in the width direction. The torsion spring 41 is positioned in the space S so as to partially protrude from the pair of support holes 24 and fastened to the second connecting wall portion 15, and is located behind the bearing hole 21 (shaft portion 32). Thus, the rear ends of both extended portions 41 a are elastically brought into contact with the upper surface of the locking portion 34. Accordingly, the locking portion 34 of the locking member 30 is biased by the torsion spring 41 toward the lowering side, that is, the side where the locking claws 34b to 34d are fitted into the corresponding lock holes 13a and the fitting grooves 16a. . The connection portion 41b of the torsion spring 41 is disposed between the support wall portion 22 and the stopper portion 23 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 tip (rear end) of the tip 61 is crushed into a flat plate shape in the vertical direction to form a pressing part 63.

  The release handle 6 is locked and prevented from being detached when the connecting portion 41 b of the torsion 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 lifted by the torsion spring 41 in the support groove 62, thereby holding the top surface of the tip 61 in contact with the opposing inner wall surface of the support wall 22. Is done. At this time, as shown to Fig.4 (a), the press part 63 is arrange | positioned at the upper side of the input part 33 of the securing member 30 at intervals. That is, the torsion 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.

  Then, when the distal end portion 61 of the release handle 6 rotates in the clockwise direction in the figure with a contact point (hereinafter also referred to as “support point O1”) with the support wall portion 22 as a fulcrum, the engagement is pressed by the pressing portion 63. The member 30 rotates in the illustrated counterclockwise direction when the input portion 33 is lowered. Thereby, the latching | locking part 34 of the latching member 30 moves to the side which resists the urging | biasing force of the torsion spring 41, ie, the side from which each latching claw 34b-34d remove | deviates from the corresponding lock hole 13a. 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.

  In the state where the release handle 6 (front end portion 61) is held on the upper rail 4 side, the stopper portion 23 is disposed so as to block the backward movement locus of the pressing portion 63. This is for preventing the excessive insertion by the locking by the stopper portion 23 when the tip portions 61 are inserted into the support wall portion 22 in the assembly process 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 that is biased and held by the torsion spring 41 in the support groove 62 is positioned in such a manner that its upper surface abuts against the opposing surface of the support wall 22. And the press part 63 is arrange | positioned at intervals on the upper side of the input part 33 of the locking member 30. Accordingly, the locking member 30 released from the distal end portion 61 (the release handle 6) is inserted into the locking hole 13a and the fitting side to which the locking portion 34 is lowered by the torsion spring 41, that is, the locking claws 34b to 34d. It is biased toward the side that fits into the 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. Therefore, the locking member 30 is on the side where the locking portion 34 rises around the shaft portion 32 against the urging force of the torsion spring 41, that is, on the side where the locking claws 34 b to 34 d are removed from the corresponding lock holes 13 a and the like. To turn. 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 urging force of the torsion spring 41 rotates the locking member 30 in a direction in which the locking portion 34 is engaged with the lock hole 13a while being separated from the second connection wall portion 15. The relative movement of the lower rail 3 and the upper rail 4 is locked. On the other hand, due to the operating force of the release handle 6, the locking member 30 moves in the direction in which the locking portion 34 approaches the second connecting wall portion 15 and releases the engagement with the lock hole 13 a against the urging force of the torsion spring 41. , The locking of the relative movement of the lower rail 3 and the upper rail 4 is released. At this time, since the locking portion 34 approaches the second connecting wall portion 15, the unlocking stroke is limited to a range until the locking portion 34 contacts the second connecting wall portion 15. However, since the notch 35 is formed in the rear end portion of the locking portion 34 that faces the second connecting wall portion 15 on the rotation trajectory of the locking member 30, the unlocking stroke is accordingly increased. Can be increased. Thereby, the cancellation | release precision of the latching of the relative movement of the lower rail 3 and the upper rail 4 can be raised, and operativity can be improved. Further, since it is not necessary to change the shape of the upper rail 4 or the like, there is no need to increase the rail cross section.

  (2) In the present embodiment, the relative movement of the lower rail 3 and the upper rail 4 is locked by engaging the locking claws 34b to 34d inserted through the through holes 14a to 14c into the lock holes 13a and the insertion grooves 16a. . At this time, for example, when a load is applied to move the lower rail 3 and the upper rail 4 relative to each other, the locking claws 34b to 34d are inserted into the through holes 14a to 14c and the fitting grooves 16a on one side in the relative movement direction of the lower rail 3 and the upper rail 4. Shear stress is generated by receiving a load from the inner wall surface and the inner wall surface of the lock hole 13a on the other side in the relative movement direction. In other words, the locking strength of the relative movement of the lower rail 3 and the upper rail 4 is dominated by the shear strength of the locking claws 34b to 34d, and the influence of the main body 34a is small. Therefore, since the notch 35 is formed in the main body portion 34a, it is possible to prevent the locking strength of the relative movement of the lower rail 3 and the upper rail 4 from being lowered by the notch 35.

  (3) In this embodiment, when the locking portion 34 comes into contact with the second connecting wall portion 15 as the locking member 30 rotates, the notch 35 makes surface contact with the second connecting wall portion 15. Therefore, the load can be dispersed on the contact surface. Therefore, for example, the possibility that the locking portion 34 is deformed as in the case where the load is concentrated on the tip of the locking portion 34 that is in contact with the second connecting wall portion 15 can be reduced.

  (4) In the present embodiment, the locking portion 34 descends with the rotation of the locking member 30, thereby engaging the lock hole 13 a and locking the relative movement of the lower rail 3 and the upper rail 4. Therefore, even if the locking member 30 is not biased in the direction in which the locking portion 34 is engaged with the lock hole 13a due to, for example, a malfunction of the torsion spring 41, the locking portion 34 is lowered by its own weight. The locked state of relative movement of the lower rail 3 and the upper rail 4 can be maintained.

  (5) In this embodiment, when the front end portion 61 of the release handle 6 is excessively inserted into the support wall portion 22 of the upper rail 4, the rear end of the pressing portion 63 is locked by contacting the stopper portion 23. Accordingly, it is possible to prevent such excessive insertion of the distal end portion 61 of the release handle 6. Moreover, since the stopper part 23 is formed in this by the simple method which only raises the 2nd connection wall part 15 of the upper rail 4, it can suppress the increase in a number of parts and a manufacturing man-hour.

(6) In the present embodiment, since the notch 35 is formed only at the rear end of the locking portion 34 (main body portion 34a), it can be avoided that the thickness is reduced and the strength is insufficient.
(7) In this embodiment, since the surrounding closed hole-shaped lock hole 13a is employed, for example, the locking claw is compared with a part of the surrounding grooved (or notched) locked portion. Deformation when an excessive load is applied from 34b to 34d can be suppressed, and the locking strength of the relative movement of the lower rail 3 and the upper rail 4 can be increased.

In addition, you may change the said embodiment as follows.
-In the said embodiment, if the notch 35 does not affect the locking strength of the relative movement of the lower rail 3 and the upper rail 4, the formation range and inclination angle setting are arbitrary. Moreover, the notch which cut off the corner | angular part of the rear-end upper part of the latching | locking part 34 in step shape may be sufficient.

  -In the said embodiment, the number of the latching claw arranged in parallel in the front-back direction of the latching | locking part 34 is arbitrary, and it matches with the setting of the latching strength of the relative movement of the lower rail 3 and the upper rail 4, and a required unlocking stroke. An appropriate number may be adopted.

-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.
In the embodiment, a biasing member made of a leaf spring may be adopted instead of the torsion spring 41.

In the embodiment, a biasing member that biases the locking member 30 and a member that holds the release handle 6 (tip portion 61) may be provided separately.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

(A) In the vehicle seat slide device according to any one of claims 1 to 4,
The vehicle seat slide device according to claim 1, wherein the locked portion has a closed hole shape. According to this configuration, since the locked portion is in the shape of a closed hole in the periphery, the deformation can be suppressed as compared with, for example, a partially open groove shape in the periphery. The locking strength of the relative movement of the first rail and the second rail can be increased.

  S: Space, 2 ... Vehicle floor, 3 ... Lower rail (first rail), 4 ... Upper rail (second rail), 5 ... Seat, 6 ... Release handle, 11 ... First side wall, 12 ... First connecting wall , 13 ... 1st folding | turning wall part, 13a ... Lock hole (locked part), 14 ... 2nd side wall part (side wall part), 14a-14c ... Through-hole, 15 ... 2nd connection wall part (connection wall part) , 16 ... 2nd folding wall part (folding wall part), 16a ... Insertion groove, 21 ... Bearing hole, 30 ... Locking member, 32 ... Shaft part, 34 ... Locking part, 34a ... Body part, 34b-34d ... Locking claws, 35 ... notches, 41 ... torsion springs (biasing members).

Claims (4)

Is fixed to the vehicle floor and hand of the vehicle seat, the first rail having a locked portion,
The vehicle floor and is fixed to the other side of the vehicle seat, the relative first rail and a second rail which is relatively movably coupled, arranged in a width direction perpendicular to the longitudinal direction of the second rail a pair of side wall portions that are, and a second rail having a connecting wall portion connecting proximal ends of the both side wall portions apart from the disposed first rail so as to face the vehicle height direction to the first rail When,
Said first disposed rail and the space formed between the second rail, a locking member coupled to rotatably the second rail about an axis extending in the width direction,
A locking portion formed at a distal end portion of the locking member, wherein the locking member is engaged with the locked portion while being separated from the connecting wall portion as the locking member rotates in one side direction. The relative movement of the first rail and the second rail is restricted , and the engagement with the locked portion is released while approaching the connecting wall portion as the locking member rotates in the other direction. It has a tip with forming a flat plate to release the restriction of the relative movement of the first rail and the second rail, and the side opposite to the connecting wall on the rotational path of the locking member in the distal portion A locking part having a notch in the surface of
A vehicle seat slide device comprising: a biasing member that biases the locking member in a direction in which the locking portion engages with the locked portion. The vehicle seat slide device according to claim 1,
The second rail has a tip at a position closer to the first rail at the side wall portion has a proximal end to a position away from the first rail, the second rail from the front end of the side wall portions A pair of folded wall portions projecting outward in the width direction and folded back to the base end side of the side wall portion;
The first rail is
A first side wall of the pair are arranged in parallel in the width direction,
It is arranged so as to face the vehicle height direction to the second rail, a first connecting wall portion connecting proximal ends of the both first side wall portions apart from the second rail,
The first side wall portion protrudes inward in the width direction from the distal end of the first side wall portion close to the second rail, is folded back to the proximal end side of the first side wall portion, and is surrounded by the side wall portion and the folded wall portion of the second rail. A pair of first folded wall portions to be
The locked portion is disposed at a base end of the first folded wall portion,
A through hole formed in the side wall of the second rail;
An insertion groove formed at the tip of the folded wall portion of the second rail,
The locking portion is
A main body disposed between the side walls of the second rail;
A locking claw that protrudes outward in the width direction of the main body and is inserted into the through hole, and can be inserted into the locked portion and the insertion groove;
The vehicle seat slide device according to claim 1, wherein the cutout is formed in the main body. The vehicle seat slide device according to claim 1 or 2,
The notch is when the locking portion to the connecting wall with the rotation of the other direction of the locking member is in contact, that is a form formed to the connecting wall and the surface contact A vehicle seat slide device. In the vehicle seat slide device according to any one of claims 1 to 3,
The locking portion descends as the locking member rotates in one side direction, thereby engaging with the locked portion and restricting relative movement of the first rail and the second rail. A vehicle seat slide device characterized by the above.

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