JP5998856B2 - 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. The vehicle seat slide device includes a pair of left and right lower rails and an upper rail coupled to the lower rail so as to be movable in the vehicle front-rear direction, and a pair of lock plates (locks) coupled to the side walls of both upper rails. Member). The vehicle seat slide device engages a lock hole formed on the free end side of each lock plate with a lock tooth formed on each lower rail, thereby engaging the movement of the upper rail (seat) in the vehicle front-rear direction. A lock spring for biasing each lock plate is provided on the locking side.

  Further, a substantially U-shaped operation lever 100 shown in FIG. 11 is attached to the front end portion of each lock plate. That is, the operation lever 100 includes an operation grip 101 extending in the vehicle width direction and a pair of end portions 102 and 103 extending rearward from both ends of the operation grip 101. At 103, they are respectively attached to the front end portions of both lock plates. Then, by operating this operation lever 100, both lock plates are simultaneously rotated against the urging force of the lock spring to release the engagement between the lock hole and the lock teeth. As a result, the upper rail (seat) can be moved in the vehicle front-rear direction.

  Here, a belt anchor serving as a terminal of the seat belt is attached to one side of the pair of left and right upper rails. Therefore, for example, when a large load in the vehicle front-rear direction is input to the belt anchor due to a vehicle collision, for example, a vehicle body such as a vehicle floor is deformed left-right asymmetrically, and the left and right upper rails may be relatively twisted. is there. At this time, the left and right lock plates maintain their postures due to the rigidity of the operation lever 100, and the operation lever 100 does not rotate in a direction in which the lock plate is relatively disengaged from the lock teeth. The phase absorbing means 110 is provided at the corner on one side. That is, the operation lever 100 is separated at the end 102 on the side opposite to the belt anchor of the operation gripping portion 101, and the end 102 is rotatably attached to the separation portion via the phase angle absorbing means 110.

JP 2000-142188 A

By the way, in patent document 1, since the phase absorption means 110 which makes a bearing structure is provided in the corner | angular part of the one side of the operation lever 100, the structure must be complicated.
An object of the present invention is to provide a vehicle seat slide device that can maintain a state of movement locking by a lock member with a simpler structure when a pair of left and right rails are relatively twisted with a heavy load input. There is to do.

  In order to solve the above-mentioned problems, the invention according to claim 1 is configured to extend in the vehicle front-rear direction and to be disposed in the vehicle front-rear direction with respect to the pair of lower rails disposed on both sides in the width direction. A pair of inner flanges connected and arranged in parallel in the width direction, and a pair of upper rails each formed with an inner opening communicating with the width direction on both the inner flanges, on the inner sides in the width direction of the inner flanges. A flat plate portion that is pivotally connected to the upper rail around an axis extending in the width direction and penetrates both inner openings in the width direction, and is engaged with and disengaged from the lower rail with the rotation, so that the lower rail and the upper rail are relative to each other. A pair of locking members for selectively locking the movement, a pair of biasing members for biasing the locking member to the side for locking the relative movement, and extending in the width direction. Both Each of the lock members has an axis extending in the width direction, and the upper rail and the lock member. A support shaft fixed to one of the two is inserted into an elongated hole formed on the other side so as to be movable in the vehicle longitudinal direction, and is urged by a support shaft urging member in a direction intersecting the vehicle longitudinal direction. , When the load applied to the support shaft in the longitudinal direction of the vehicle is below a predetermined value by being in contact with the support shaft and formed in at least one of the elongated hole and the support shaft urging member. A wedge portion for restricting movement of the support shaft in the longitudinal direction of the support shaft in the elongated hole, the inner opening and the flat plate portion when a load applied in at least one direction of the longitudinal direction of the vehicle exceeds the predetermined value Provided to the contact portion, and summarized in that and a resistance generating portion for surge an operating force for releasing the engagement of the relative movement.

  According to this configuration, for example, when the rear end of the upper rail on one side to which the end of the seat belt is attached due to a vehicle collision or the like is lifted and the lower rail or the vehicle floor supporting the lower rail is deformed accordingly, the both locking members However, by maintaining the posture by the rigidity of the operation handle, the lock member supported by the upper rail on one side tends to be in the same state as being rotated to the side to release the locking of the relative movement. At this time, if the load applied in the relevant direction of the vehicle longitudinal direction exceeds the predetermined value, the movement restriction of the support shaft in the vehicle longitudinal direction by the wedge portion is released while elastically deforming the support shaft urging member. The support shaft moves together with the upper rail or the locking member in the longitudinal direction of the elongated hole. And both the said inner side opening and the said flat plate part contact. By providing the resistance generating portion at the contact portions of the inner openings and the flat plate portion, relative rotation of the lock member to the side where the locking of the relative movement is released is suppressed. The Therefore, relative movement of the lower rail and the upper rail can be suppressed. Further, the relative rotation of the lock member to the side where the locking of the relative movement is released can be made with a simpler structure by the resistance generating portion provided at the contact portions of the inner openings and the flat plate portion. Can be suppressed.

  According to a second aspect of the present invention, a pair of lower rails extending in the vehicle front-rear direction and disposed on both sides in the width direction are connected to the lower rail so as to be movable in the vehicle front-rear direction, and are arranged in parallel in the width direction. And a pair of upper rails formed with inner openings communicating with each other in the width direction, and the upper rails around an axis extending in the width direction on the inner side in the width direction of the inner flanges. A pair of plates that are pivotably connected to each other and have a flat plate portion that penetrates both the inner openings in the width direction, and selectively engages and disengages the lower rail with the rotation to selectively lock the relative movement of the lower rail and the upper rail. A locking member, a pair of urging members for urging and urging the locking member to the side for locking the relative movement, and extending in the width direction, and both ends thereof are connected to the locking members, respectively. An operation handle capable of transmitting an operation force for releasing the locking of the relative movement, and each of the lock members has an axis extending in a width direction and is fixed to one of the upper rail and the lock member. Is inserted into the elongated hole formed on the other side so as to be movable in the vehicle longitudinal direction, and is urged in a direction crossing the vehicle longitudinal direction by the support shaft urging member so that the upper rail can rotate freely. The support shaft is formed in at least one of the elongated hole and the support shaft urging member, and the load of the support shaft in the elongated hole is less than a predetermined value when a load applied to the support shaft in a vehicle longitudinal direction is below a predetermined value. A pair of negatives that make the contact part between the wedge part that restricts movement in the vehicle longitudinal direction and the flat plate part of the inner openings when the load applied in at least one direction in the vehicle longitudinal direction exceeds the predetermined value negative And gist that a section.

  According to this configuration, for example, when the rear end of the upper rail on one side to which the end of the seat belt is attached due to a vehicle collision or the like is lifted and the lower rail or the vehicle floor supporting the lower rail is deformed accordingly, the both locking members However, by maintaining the posture by the rigidity of the operation handle, the lock member supported by the upper rail on one side tends to be in the same state as being rotated to the side to release the locking of the relative movement. At this time, if the load applied in the relevant direction of the vehicle longitudinal direction exceeds the predetermined value, the movement restriction of the support shaft in the vehicle longitudinal direction by the wedge portion is released while elastically deforming the support shaft urging member. The support shaft moves together with the upper rail or the locking member in the longitudinal direction of the elongated hole. And both the said inner side opening and the said flat plate part contact. The contact portions of the both inner openings with the flat plate portion are negatively angled by the pair of negative angle portions, so that the lock member is relatively rotated toward the side where the locking of the relative movement is released. In order to do this, it is necessary to crush both inner openings at the flat plate portion. For this reason, the operation force required for releasing the locking of the relative movement increases rapidly, and the relative rotation of the lock member toward the releasing side is suppressed. Therefore, relative movement of the lower rail and the upper rail can be suppressed. Further, the relative rotation of the lock member to the side to release the locking of the relative movement can be simplified by the negative angle portion provided at the contact portion between the inner opening and the flat plate portion. It can be suppressed by the structure.

  According to a third aspect of the present invention, in the vehicle seat slide device according to the second aspect, the negative angle portion is configured to move the locking member from the locked state of the relative movement to the side of locking the relative movement. The gist of the present invention is that it is an inclined portion that inclines away from the flat plate portion side as it goes in the direction of rotation.

According to this configuration, for example, in the case of a vehicle collision or the like, the operation force required to release the relative movement can be rapidly increased by the inclined portion having an extremely simple shape.
According to a fourth aspect of the present invention, in the vehicle seat slide device according to the second aspect, the negative angle portion is cantilevered by the inner opening, and the relative movement is released from the unlocked state. The gist of the present invention is that it is a protruding portion that protrudes along the direction of rotation of the flat plate portion toward the side that stops movement.

  According to this configuration, for example, in the event of a vehicle collision or the like, the inner opening contacts the flat plate portion at the protruding portion. At this time, the projecting portion pressed against the flat plate portion is deformed so as to tilt, so that the contact portion of the inner opening with the flat plate portion becomes a negative angle. In other words, if the protrusion (inner opening) and the flat plate are in contact with each other, that is, before the protrusion is deformed, between the protrusion and the flat plate, regardless of the rotation position of the lock member. Since the gap is kept substantially constant, the operation of the lock member during normal operation can be further stabilized.

  The invention according to claim 5 has a pair of flanges extending in the longitudinal direction of the vehicle and juxtaposed in the width direction, and a plurality of locking claws are formed at the tips of both flanges. A pair of lower rails disposed on both sides, and a pair of inner flanges connected to the lower rails so as to be movable relative to each other and arranged in parallel in the width direction on the inner side in the width direction of the both flanges; Is connected to the upper rail so as to be rotatable about a pair of upper rails each formed with an inner opening communicating in the width direction and an axis extending in the width direction on the inner side in the width direction of the inner flanges. And a locking hole into which the locking claw can be fitted is formed at both side edges in the width direction of the flat plate portion. The above-mentioned A pair of locking members for selectively locking the relative movement of the rail and the upper rail, a pair of biasing members for rotating and biasing the locking member to the side for locking the relative movement, and extending in the width direction Each of the lock members has an axis extending in the width direction, and each of the lock members has an axis extending in the width direction. A support shaft fixed to one of the upper rail and the lock member is inserted into an elongated hole formed on the other side so as to be movable in the vehicle longitudinal direction, and in a direction intersecting the vehicle longitudinal direction by the support shaft urging member. By being biased, the upper rail is rotatably connected to the upper rail, and is formed in at least one of the elongated hole and the support shaft biasing member. A wedge part that restricts movement of the support shaft in the longitudinal direction of the support shaft in the elongated hole when the value is below a fixed value, and both inner sides of the flat plate part when a load applied in at least one direction of the longitudinal direction of the vehicle exceeds the predetermined value The gist is provided with a kerf that is formed in a contact portion with the opening and induces deformation of the locking hole into which the locking claw is fitted so as to hold the locking claw.

  According to this configuration, for example, when the rear end of the upper rail on one side to which the end of the seat belt is attached due to a vehicle collision or the like is lifted and the lower rail or the vehicle floor supporting the lower rail is deformed accordingly, the both locking members However, by maintaining the posture by the rigidity of the operation handle, the lock member supported by the upper rail on one side tends to be in the same state as being rotated to the side to release the locking of the relative movement. At this time, if the load applied in the relevant direction of the vehicle longitudinal direction exceeds the predetermined value, the movement restriction of the support shaft in the vehicle longitudinal direction by the wedge portion is released while elastically deforming the support shaft urging member. The support shaft moves together with the upper rail or the locking member in the longitudinal direction of the elongated hole. And both the said inner side opening and the said flat plate part contact. Since the cut groove is formed in the contact portion of the flat plate portion with the both inner openings, the lock hole is deformed so as to hold the lock pawl by the guide of the cut groove. For this reason, the operating force required to unlock the relative movement suddenly increases due to a sudden increase in the frictional force between the locking hole and the locking claw, and the lock member is relatively moved toward the releasing side. Rotation is suppressed. Therefore, relative movement of the lower rail and the upper rail can be suppressed. In addition, the relative rotation of the lock member to the side to release the locking of the relative movement can be performed with a simpler structure by the kerf provided in the contact portion with the inner openings of the flat plate portion. Can be suppressed.

  The present invention has an effect that the state of movement locking by the lock member can be maintained with a simpler structure when the pair of left and right rails are relatively twisted with a heavy load input.

The side view which shows the vehicle seat to which this invention is applied. The perspective view which shows the 1st Embodiment of this invention. The disassembled perspective view which shows the same embodiment. (A) and (b) are transverse cross sections showing the embodiment. (A)-(c) is a longitudinal cross-sectional view which shows the same embodiment. The longitudinal cross-sectional view which shows the operation | movement of the embodiment. (A) (b) is a schematic diagram which shows operation | movement of the embodiment. (A) (b) is a longitudinal cross-sectional view which shows the 2nd Embodiment of this invention and its operation | movement. (A) (b) is sectional drawing which shows the 3rd Embodiment of this invention. Sectional drawing which shows the operation | movement of the embodiment. The top view which shows a prior art form.

(First embodiment)
Hereinafter, a first embodiment of a vehicle seat slide device will be described. Hereinafter, the vehicle front-rear direction is referred to as “front-rear direction”.

  As shown in FIG. 1, the lower rail 3 is fixed to the vehicle floor 2 so as to extend in the front-rear direction, and the upper rail 4 is attached to the lower rail 3 so as to be movable relative to the lower rail 3 in the front-rear direction. Has been. That is, in this embodiment, the longitudinal direction (relative movement direction) of the lower rail 3 and the upper rail 4 coincides with the front-rear direction.

  As shown in FIG. 2, the lower rail 3 and the upper rail 4 are arranged in pairs in the width direction (direction perpendicular to the paper surface in FIG. 1). 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 an operation handle 6 for releasing the locked state is provided.

  As shown in FIG. 3, the lower rail 3 is made of a plate material, and includes a pair of side wall portions 11 extending in the vertical direction on both sides in the width direction and a bottom wall portion 12 that connects between the base ends (lower ends) of the side wall portions 11. A flange 13 is continuously formed at the distal end (upper end) of each side wall portion 11 so as to project inward in the width direction and bend further back to the proximal end side of the side wall portion 11.

  In addition, a plurality of notches 13a are formed upward from the front end (lower end) at a predetermined interval in the longitudinal direction of each flange 13 of the lower rail 3 and between adjacent notches 13a. A square tooth-like locking claw 13b is formed. Accordingly, the plurality of locking claws 13b are arranged in parallel in the longitudinal direction of the lower rail 3 with the predetermined interval.

  On the other hand, the upper rail 4 is made of a plate material, and as shown in FIGS. 4A and 4B, a pair of inner flanges 14 extending in the vertical direction between the two flanges 13 of the lower rail 3 and the lower rails 3 of these inner flanges 14. It has the lid wall part 15 which connects between the base ends (upper end) which spaces apart. An outer flange 16 that extends outward in the width direction and is folded back so as to be surrounded by the side wall 11 and the flange 13 is continuously formed at the tip (lower end) of each inner flange 14.

  That is, the lower rail 3 and the upper rail 4 have U-shaped rail cross sections whose opening sides are abutted with each other, and are prevented from coming off in the vertical direction mainly by engagement with the flange 13 and the outer flange 16. 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.

  In addition, between the lower end part of each outer flange 16 and the lower end part of the side wall part 11 facing this, and between the upper end part of each outer flange 16 and the upper end part of the side wall part 11 facing this, a plurality of spherical shapes A ball 20a is interposed. The upper end portion of each outer flange 16 forms a guide portion 16a that is curved in an arc shape so as to go inward in the width direction as it goes upward according to the outer shape of the ball 20a.

  As shown in FIG. 3, each ball 20a is mounted on a resin holder 20b extending in the front-rear direction (rail longitudinal direction). There are a total of four balls 20a mounted on each holder 20b, a pair disposed at the front end of the holder 20b and a pair disposed at the rear end. The upper rail 4 is supported so as to be slidable in the longitudinal direction (front-rear direction) with respect to the lower rail 3 in such a manner that the balls 20 a roll with the lower rail 3.

  Both inner flanges 14 of the upper rail 4 are formed with substantially rectangular inner openings 14a in the longitudinal intermediate portions thereof, and upper ends (guide portions 16a) of both outer flanges 16 of the upper rail 4 are provided with A substantially rectangular outer opening 16b is formed in accordance with the position of the inner opening 14a in the longitudinal direction. The inner opening 14a and the outer opening 16b communicate with each other in the width direction. In particular, the outer opening 16b is a notch opened upward.

  A bracket 17 is attached to the lid wall portion 15 of the upper rail 4 at a portion in front of the inner opening 14a and the like. The bracket 17 includes a pair of support wall portions 18 extending in the vertical direction between the inner flanges 14 of the upper rail 4 and a top plate portion 19 that connects between the base ends (upper ends) of the support wall portions 18 that are separated from the lower rail 3. Have. The bracket 17 is fastened to the lid wall portion 15 of the upper rail 4 at the top plate portion 19 with both support wall portions 18 being sandwiched between the inner flanges 14 of the upper rail 4 in the width direction. In addition, concentric circular shaft mounting holes 18a communicating with each other in the width direction are formed in the lower portions of the front end portions of the support wall portions 18, respectively.

  As shown in FIG. 4 (b), on both support wall portions 18 of the bracket 17, columnar support shafts 22 having both end portions inserted and fixed to the shaft mounting holes 18a are supported. Needless to say, the center line of the support shaft 22 extends in the width direction. In the upper rail 4, a lock lever 30 is rotatably connected by a support shaft 22 on the inner side in the width direction of both support wall portions 18.

  That is, as shown in FIG. 3, the lock lever 30 includes a handle 31 made of a plate material extending in the front-rear direction. The handle portion 31 is erected in such a manner that a pair of vertical wall portions 32 extending in the longitudinal direction are juxtaposed in the width direction. The distance in the width direction between the two vertical wall portions 32 is set to be smaller than the distance in the width direction between the two support wall portions 18 of the bracket 17. The vertical wall portions 32 are connected in the width direction between the upper end edges by a plurality of (three) connection walls 33 arranged in parallel in the front-rear direction at each front end portion, and at the rear end portions, The upper edge is connected in the width direction by the plate portion 34.

  As shown in FIGS. 5A and 5B, each of the vertical wall portions 32 is formed with a long hole 35 extending in the front-rear direction at a height position equivalent to that of the support shaft 22 (shaft mounting hole 18a). ing. The opening width in the short direction (vertical direction) of the long hole 35 is set to be equal to the diameter of the support shaft 22. In both the long holes 35, the support shafts 22 whose both ends are fixed to the shaft mounting holes 18 a in a state where the vertical wall portions 32 of the handle portion 31 are sandwiched between the support wall portions 18 of the bracket 17 in the width direction. Is inserted. Thus, the handle 31 is connected to the upper rail 4 (the bracket 17) so as to be rotatable in the vertical direction in a state in which the movement in the front-rear direction is allowed in the range of the long hole 35.

  As shown in FIG. 3, the handle portion 31 includes a pair of insertion-shaped portions 36 and 37 that respectively extend from the front ends of the vertical wall portions 32 to the front of the vehicle. These insertion-shaped portions 36 and 37 are reduced below the front end of the vertical wall portion 32, and close to each other in the width direction opposite to each other so as to be overlapped to form a handle insertion portion 38.

  Each vertical wall 32 is provided with a pair of fitting pieces 32a projecting downward from the lower end at the rear end portion with a gap in the front-rear direction. On the other hand, the lock lever 30 includes a lock plate 39 as a flat plate portion that extends in the front-rear direction and the width direction in a manner that penetrates both the inner openings 14a and the outer openings 16b. The lock plate 39 is formed with a total of four slit-like fitting holes 39a that open in the vertical direction so as to face each fitting piece 32a. The lock plate 39 is fixed to the handle portion 31 by fitting and fixing the corresponding fitting piece 32a in each fitting hole 39a.

  The lock plate 39 is formed with a plurality (three) of locking holes 39b arranged in parallel in the front-rear direction on the outer side in the width direction than the fitting piece 32a. As shown in FIG. 4 (a), each locking hole 39 b opens in the vertical direction facing the flange 13, and a plurality (three) of locking claws 13 b adjacent in the longitudinal direction of the lower rail 3. It is arranged at a position that can match.

  Then, as indicated by the solid line in FIG. 4A, when the lock lever 30 is rotated around the support shaft 22 so that the lock plate 39 is raised, the locking claws 13b corresponding to the respective locking holes 39b are inserted. It is possible. When the locking claw 13b corresponding to each locking hole 39b is inserted, the relative movement of the lower rail 3 and the upper rail 4 is locked. On the other hand, as shown by a two-dot chain line in FIG. 4A, when the lock lever 30 is rotated around the support shaft 22 so that the lock plate 39 is lowered, each of the locking holes 39b corresponds to the corresponding locking claw 13b. It is set to deviate from. At this time, the locking of the relative movement of the lower rail 3 and the upper rail 4 is released.

  The dimension in the width direction of the lock plate 39 is larger than the distance in the width direction between the two guide portions 16a of the upper rail 4 and larger than the distance in the width direction between the outer flanges 16 below the guide portions 16a. It is set small. Therefore, the lock plate 39 penetrates the outer opening 16b in the width direction in the locked state of the relative movement of the lower rail 3 and the upper rail 4, but does not interfere with the outer flange 16 in the released state of the relative movement lock.

  As shown in FIG. 3, a lock spring 50 made of one wire is disposed in the upper rail 4. The lock spring 50 is formed in a substantially U-shape that opens to the rear side in plan view, and has a pair of extending portions 51 that are symmetrical and extend in the front-rear direction. It has the connection part 52 which connects between the front ends of the expanded front end part in the width direction. As shown in FIGS. 5A and 5B, the lock spring 50 has a wedge portion 53 formed by projecting the middle portion in the longitudinal direction of each extending portion 51 upward, and the rear of each extending portion 51. It has a lever side locking end portion 54 formed by bending the end portion upward. Further, the widened front end portions of the extending portions 51 form a substantially pentagonal shape together with the connection portion 52 to form the rail side locking end portion 55.

  The lock spring 50 is generally disposed in the handle portion 31 in such a manner that the rail side locking end portion 55 protrudes upward from between the adjacent connection walls 33 of the handle portion 31 on the front side of the support shaft 22. Then, the lock spring 50 inserts the support shaft 22 into both the wedge portions 53 from above the support shaft 22, and inserts and fixes both lever side locking end portions 54 to the lock plate 39 from below the lock plate 39. The rail side locking end portion 55 is supported by the upper rail 4 or the like by contacting the lower surface of the lid wall portion 15 of the upper rail 4. At this time, the lock spring 50 pivots the lock lever 30 to the side where the lock plate 39 ascends at the rear end of both the extending portions 51, that is, the side where the locking claw 13b corresponding to each locking hole 39b is fitted. Energize. Further, the lock spring 50 urges the support shaft 22 downward in the wedge portions 53 by the reaction force, that is, in a direction intersecting the longitudinal direction of the long hole 35, thereby the support shaft 22 in the long hole 35. Locks forward and backward movement.

  That is, the position of the support shaft 22 in the front-rear direction within the long hole 35 is urged and held by the wedge portions 53 of the lock spring 50. In the present embodiment, the support shaft 22 is urged and held at the center in the front-rear direction of the long hole 35. However, when the load applied in the front-rear direction exceeds a predetermined value, the support shaft 22 moves the long hole 35 in the front-rear direction while elastically deforming the wedge portion 53.

  Here, as shown in FIG. 5C, the rear end surface 14b of the inner flange 14 in the inner opening 14a is formed in an arc shape centering on the support shaft 22 (shaft mounting hole 18a). Therefore, the clearance in the front-rear direction between the lock plate 39 and the rear end surface 14 b is constant regardless of the rotational position of the lock lever 30.

  On the other hand, of the front end surface 14c of the inner flange 14 in the inner opening 14a, the portion below the lock plate 39 in the locked state of the relative movement is an arc-shaped flat centered on the support shaft 22 (shaft mounting hole 18a). A portion 14d is formed. Further, in the front end surface 14c, above the lock plate 39 in the relative movement locking state, the lock plate 39 (lock lever 30) is turned to the ascending side (the side that locks the relative movement). As it goes in the direction, an inclined portion 14e is formed as a negative angle portion that inclines away from the lock plate 39 side toward the front of the vehicle.

  Therefore, if the lock plate 39 (lock lever 30) rotates from the locked state of the relative movement to the lower side (the side to release the lock of the relative movement), the lock plate 39 and the front end surface 14c (flat) The clearance in the front-rear direction of the portion 14 d) is constant regardless of the rotational position of the lock lever 30. Further, if the lock plate 39 (lock lever 30) rotates from the locked state of the relative movement to the ascending side (side of locking the relative movement), the lock plate 39 and the front end surface 14c (inclined portion) The clearance in the front-rear direction of 14e) increases as the lock plate 39 rotates to the ascending side. That is, as shown in FIG. 6, when the load applied to the front of the vehicle exceeds a predetermined value, the contact portion of both inner openings 14a with the lock plate 39 is made into a negative angle by the inclined portion 14e.

  As shown in FIG. 3, the operation 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 the upper rails 4. The distal end portion 61 extending rearward of the operation handle 6 has a flat cylindrical shape reduced in the width direction. Both the inner diameter of the handle insertion portion 38 in the width direction and the upper rail 4 are larger. The outer diameter in the width direction is smaller than the distance in the width direction between the inner flanges 14. The distal end portion 61 is inserted into the upper rail 4 from the front opening end of the upper rail 4 and is connected to the lock lever 30 by inserting the handle insertion portion 38. Accordingly, the distal end portion 61 basically rotates integrally with the lock lever 30 around the support shaft 22. A slit-like support groove 62 extending in the width direction is formed at the lower portion of the tip portion 61.

  A handle spring 65 made of one wire is disposed in the upper rail 4. The handle spring 65 is formed in a substantially U-shape that opens to the rear side in plan view, and has a pair of extending portions 66 that are symmetrical and extend in the front-rear direction. It has the connection part 67 which connects between front ends in the width direction.

  As shown in FIG. 5 (a), the handle spring 65 has a connecting portion 67 fitted in the support groove 62 of the tip end portion 61 (operation handle 6) into which the handle insertion portion 38 is inserted. Thus, the rear ends of the extending portions 66 are in contact with the lower surface of the connection wall 33 of the lock lever 30 (handle portion 31). The distal end portion 61 is urged so as to be raised by the handle spring 65 in the support groove 62.

  The front end portion 61 is supported by a front end portion of the handle insertion portion 38 inserted into the front end portion 61 so as to be swingable in the vertical direction in front of the vehicle in the support groove 62 (that is, the biasing position of the front end portion 61 by the handle spring 65). The posture of the groove 62 is controlled by being biased upward by the handle spring 65.

  When the front end of the tip portion 61 is lifted, the lock lever 30 together with the tip portion 61 resists the urging force of the lock spring 50, and the side where the lock plate 39 descends around the support shaft 22, that is, each locking hole 39b is formed. It rotates to the side which removes from the corresponding latching claw 13b.

  Here, it is assumed that the operation force of the operation handle 6 is released. At this time, due to the urging force of the lock spring 50, the lock lever 30 together with the distal end portion 61 (operation handle 6) moves up the lock plate 39 around the support shaft 22, that is, the locking claw 13b corresponding to each locking hole 39b. The relative movement of the lower rail 3 and the upper rail 4 is locked in the manner described above. And the position of the front-back direction of the sheet | seat 5 supported by the upper rail 4 is hold | maintained.

  Thereafter, it is assumed that the operation handle 6 is operated so as to lift its front end. At this time, against the urging force of the lock spring 50, the lock lever 30 together with the distal end portion 61 (operation handle 6) is on the side where the lock plate 39 descends around the support shaft 22, that is, the engagement holes 39b correspond to each other. By rotating to the side away from the pawl 13b, the locking of the relative movement of the lower rail 3 and the upper rail 4 is released in the manner described above. And the position adjustment of the front-back direction of the sheet | seat 5 supported by the upper rail 4 is attained.

Next, the operation of this embodiment will be described.
As shown in the change from FIG. 7A to FIG. 7B, a large load in the front of the vehicle is input to the seat 5 due to a vehicle collision (front collision), for example, and the end of the seat belt SB (belt It is assumed that the rear end of the upper rail 4 on one side to which the anchor) is attached is lifted together with the lower rail 3 and is deformed so that the vehicle floor 2 is turned up accordingly. At this time, since both lock levers 30 hold the posture by the rigidity of the operation handle 6, the lock lever 30 supported by the upper rail 4 on the side rotates to the side for releasing the locking of the relative movement. Try to be in the same state.

  At the same time, the contact reaction force between the lower rail 3 and the lock lever 30 that relatively moves toward the rear of the vehicle acts as a load that moves the lock lever 30 toward the front of the vehicle. Thereby, the lock lever 30 tends to move forward of the vehicle with respect to the upper rail 4. At this time, if the load applied to the front of the vehicle exceeds the predetermined value, the movement restriction in the front-rear direction of the support shaft 22 in the long hole 35 by the wedge portions 53 is released while elastically deforming the lock spring 50, and the long hole The lock lever 30 moves to the front of the vehicle while the support shaft 22 runs idly in 35.

  Then, both inner openings 14a (front end face 14c) and the lock plate 39 are in contact with each other. The contact portions of both inner openings 14a with the lock plate 39 are made into a negative angle by a pair of inclined portions 14e, so that the lock lever 30 rotates relatively to the side where the locking of the relative movement is released. For this purpose, it is necessary to crush both inner openings 14a (flat portions 14d) with the lock plate 39. For this reason, the operation force required for releasing the relative movement is rapidly increased, and the relative rotation of the lock lever 30 to the releasing side is suppressed. And the relative movement of the lower rail 3 and the upper rail 4 is suppressed.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the relative movement of the lower rail 3 and the upper rail 4 is suppressed by abruptly increasing the operation force required for releasing the locking of the relative movement by the inclined portion 14e in the case of a vehicle collision (front collision), for example. As a result, the movement of the seat 5 in the front-rear direction can be suppressed. Further, the relative rotation of the lock lever 30 to the side of releasing the locking of the relative movement is performed by a negative angle portion (inclined portion 14e) provided at the contact portion between the inner opening 14a and the lock plate 39. It can be suppressed with a simpler structure.

(2) In this embodiment, for example, in the case of a vehicle collision (front collision) or the like, the operation force required to release the relative movement can be rapidly increased by the inclined portion 14e having an extremely simple shape.
(3) In the present embodiment, for example, in the event of a vehicle collision (front collision), the inclined portion 14e is locked at the lock plate 39 (engagement position with the locking claw 13b) away from the rotation center of the lock lever 30. The lever 30 is made difficult to turn to the side for releasing the locking of the relative movement. For this reason, relative rotation of the lock lever 30 to the release side can be suppressed more efficiently than, for example, a case where the lock lever 30 is provided near the rotation center (support shaft 22).

  (4) In the present embodiment, the lock lever 30 rotatably connected to the upper rail 4 by the support shaft 22 is movable in the front-rear direction within the range of the long hole 35. If the load applied in the front-rear direction falls below a predetermined value, the movement of the support shaft 22 biased by the lock spring 50 in the front-rear direction in the long hole 35 is restricted by the wedge portions 53. The lock lever 30 is restricted from moving in the front-rear direction with respect to the upper rail 4. In this manner, the backlash of the upper rail 4 and the lock lever 30 in the front-rear direction, and hence the backlash of the lower rail 3 and the upper rail 4 in the front-rear direction can be suppressed without making the accuracy of the support shaft 22 difficult. And the rattling (or vibration) in the front-back direction of the sheet | seat 5 can be suppressed.

  On the other hand, when a large load in the front of the vehicle is input to the seat 5 due to a vehicle collision or the like in the locked state of the relative movement by the lock lever 30, the load applied to the front of the vehicle in the above-described manner becomes the predetermined value. If it exceeds the upper limit, the movement restriction in the longitudinal direction of the support shaft 22 in the long hole 35 by the wedge portions 53 is released while elastically deforming the lock spring 50, and the lock lever is made to run idle in the long hole 35. 30 moves forward of the vehicle. And both inner side opening 14a (inclination part 14e) and the lock plate 39 contact. Therefore, when the operating force required for unlocking the relative movement is rapidly increased by the inclined portion 14e, the deformation of the support shaft 22 can be reduced or eliminated by the amount of movement of the support shaft 22 in the long hole 35. Then, the locking of the relative movement by the lock lever 30 can be further stabilized.

  (5) In the present embodiment, the support shaft 22 biased by the lock spring 50 can be controlled to move in the longitudinal direction in the long hole 35 by using both wedge portions 53 having a very simple structure. Further, the movement restricting force in the longitudinal direction of the support shaft 22 in the long hole 35 can be simplified by adjusting the apex angle of the wedge portions 53, the friction coefficient between the support shaft 22 and the wedge portions 53, the biasing force of the lock spring 50, and the like. Can be changed.

  (6) In the present embodiment, by forming both wedge portions 53 in the lock spring 50, the movement of the support shaft 22 in the longitudinal direction in the long hole 35 can be restricted without changing the structure of the lock lever 30. .

(Second Embodiment)
Hereinafter, a second embodiment of the vehicle seat slide device will be described. The second embodiment has a configuration in which only the shape for making the contact portion of both inner openings 14a with the lock plate 39 negative is changed, and detailed description of similar parts is omitted. To do.

  As shown in FIG. 8A, each inner opening 14a of the present embodiment has a substantially L-shaped groove portion 70 extending from the front end upper portion to the front lower portion, and a lower end corresponding to the shape of the groove portion 70. Thus, a projecting portion 71 that is cantilevered is formed. The protrusion 71 protrudes along the rotational direction of the lock plate 39 from the unlocked state of the relative movement to the side for locking the relative movement, and faces the rear end surface 14b of the protrusion 71. The end surface 72 is formed in an arc shape centered on the support shaft 22 (shaft mounting hole 18a). Therefore, the clearance in the front-rear direction of the lock plate 39 and the end surface 72 is constant regardless of the rotation position of the lock lever 30.

  In such a configuration, for example, a large load in the front of the vehicle is input to the seat 5 due to a vehicle collision (front collision) or the like, and the rear of the upper rail 4 on one side to which the end (belt anchor) of the seat belt SB is attached. It is assumed that the end is lifted together with the lower rail 3 and the vehicle floor 2 is deformed so as to turn up accordingly. At this time, if the load applied to the front of the vehicle in the above-described manner exceeds the predetermined value, the movement restriction in the front-rear direction of the support shaft 22 in the long hole 35 by the wedge portions 53 is released while the lock spring 50 is elastically deformed. Then, the lock lever 30 moves forward in the vehicle while the support shaft 22 runs idle in the long hole 35. And both inner side opening 14a (end surface 72 of the protrusion part 71) and the lock plate 39 contact.

  At this time, as shown by a change from FIG. 8A to FIG. 8B, the protrusion 71 pressed against the lock plate 39 is deformed so as to tilt (forward tilt), so that the inner opening 14a is deformed. The contact portion with the lock plate 39 is made negative. That is, in the end surface 72 of the projecting portion 71, the lower portion 72a of the lock plate 39 in the locked state of the relative movement remains arcuate with the support shaft 22 (shaft mounting hole 18a) as the center. . On the other hand, of the end surface 72 of the projecting portion 71, the upper portion 72b of the lock plate 39 that is in the locked state of the relative movement is the lock plate 39 on the rising side (the side that locks the relative movement). As the lock lever 30) moves in the direction of rotation, the lock lever 30) is inclined so as to move away from the lock plate 39 side toward the front of the vehicle. Accordingly, if the lock plate 39 (lock lever 30) rotates from the locked state of the relative movement to the ascending side (the side of locking the relative movement), the end surfaces of the lock plate 39 and the protruding portion 71 72 The clearance in the front-rear direction of the front end surface 14c (inclined portion 14e) of the inner opening 14a increases as the lock plate 39 rotates to the ascending side.

  Therefore, in order for the lock lever 30 to rotate relatively to the side where the locking of the relative movement is released, it is necessary to crush both inner openings 14a (lower part 72a) with the lock plate 39. For this reason, the operation force required for releasing the relative movement is rapidly increased, and the relative rotation of the lock lever 30 to the releasing side is suppressed. And the relative movement of the lower rail 3 and the upper rail 4 is suppressed.

As described above in detail, according to this embodiment, the following effects can be obtained in addition to the effects (1), (3) to (6) in the first embodiment.
(1) In the present embodiment, if the protrusion 71 (inner opening 14a) and the lock plate 39 are not in contact, that is, before the protrusion 71 is deformed, the protrusion 71 is independent of the rotation position of the lock lever 30. In addition, since the gap between the lock plates 39 is kept substantially constant, the operation of the lock lever 30 during normal operation can be further stabilized.

(Third embodiment)
Hereinafter, a third embodiment of the vehicle seat slide device will be described. Note that the third embodiment has a configuration in which the shape for rapidly increasing the operating force for releasing the locking of the relative movement is changed at the contact portion between the inner openings 14a and the lock plate 39. Detailed description of this part will be omitted.

  As shown in FIGS. 9 (a) and 9 (b), the lock plate 39 of the present embodiment has a pair of extending walls that are substantially U-shaped in plan view, further forward than both foremost locking holes 39b. 75 is formed, and a locking hole 76 is formed in the central portion of each of the extending walls 75. Each locking hole 76 opens in the vertical direction facing the flange 13, and the locking hole 76 and the other locking holes 39 b behind the locking hole 76 are adjacent to each other in the longitudinal direction of the lower rail 3 (four). ) Of the locking claw 13b. Needless to say, the relative movement of the lower rail 3 and the upper rail 4 is locked when the locking claws 13b corresponding to the locking holes 39b and 76 are fitted.

  Each locking hole 76 is formed with a kerf 77 extending inward in the width direction from the inner rear end in the width direction. Accordingly, each locking hole 76 is opened in the width direction in the cut groove 77. The kerf 77 is disposed opposite to the inner flange 14 (inner opening 14a) in the front-rear direction.

  In the present embodiment, the front end surface 78 of the inner flange 14 in the inner opening 14a is formed in an arc shape centered on the support shaft 22 (shaft mounting hole 18a). Therefore, the clearance in the front-rear direction of the lock plate 39 (extending wall 75) and the front end surface 78 is constant regardless of the rotational position of the lock lever 30.

  In such a configuration, for example, a large load in the front of the vehicle is input to the seat 5 due to a vehicle collision (front collision) or the like, and the rear of the upper rail 4 on one side to which the end (belt anchor) of the seat belt SB is attached. It is assumed that the end is lifted together with the lower rail 3 and the vehicle floor 2 is deformed so as to turn up accordingly. At this time, if the load applied to the front of the vehicle in the above-described manner exceeds the predetermined value, the movement restriction in the front-rear direction of the support shaft 22 in the long hole 35 by the wedge portions 53 is released while the lock spring 50 is elastically deformed. Then, the lock lever 30 moves forward in the vehicle while the support shaft 22 runs idle in the long hole 35. Then, both inner openings 14a (front end face 78) and the lock plate 39 (extending wall 75) come into contact.

  At this time, as shown by the change from FIG. 9B to FIG. 10, the extension claw 75 is pressed against the inner opening 14 a (front end surface 78) so that the locking claw 13 b is held by the kerf 77. The deformation of the locking hole 76 into which the locking claw 13b is fitted is induced. For this reason, the operating force required to unlock the relative movement suddenly increases due to a sudden increase in the frictional force between the locking hole 76 and the locking claw 13b, and the lock member is relatively moved toward the releasing side. Rotation is suppressed. And the relative movement of the lower rail 3 and the upper rail 4 is suppressed.

As described above in detail, according to the present embodiment, the following effects can be obtained in addition to the effects (3) to (6) in the first embodiment.
(1) In the present embodiment, the relative movement of the lower rail 3 and the upper rail 4 is suppressed by abruptly increasing the operation force required for unlocking the relative movement by the kerf 77 at the time of a vehicle collision (front collision), for example. As a result, the movement of the seat 5 in the front-rear direction can be suppressed. Further, the relative rotation of the lock lever 30 to the side for releasing the locking of the relative movement is performed by a kerf 77 provided in a contact portion (extension wall 75) with the inner opening 14a of the lock plate 39, It can be suppressed with a simpler structure.

In addition, you may change the said embodiment as follows.
In the first embodiment, the seat 5 is mounted forward of the vehicle, but may be mounted backward of the vehicle. For example, a large load in the rear of the vehicle is input to the seat 5 due to a vehicle collision (rear collision), and the front end of the upper rail 4 on one side to which the end of the seat belt SB (belt anchor) is attached is lifted together with the lower rail 3. Along with this, it is assumed that the vehicle floor 2 is deformed so as to turn up. In this case, the relative movement of the lower rail 3 and the upper rail 4 can be suppressed by abruptly increasing the operation force required for releasing the locking of the relative movement according to the first embodiment by the inclined portion. Directional movement can be suppressed.

  In the second embodiment, the seat 5 is mounted on the front side of the vehicle, but may be mounted on the rear side of the vehicle. For example, a large load in the rear of the vehicle is input to the seat 5 due to a vehicle collision (rear collision), and the front end of the upper rail 4 on one side to which the end of the seat belt SB (belt anchor) is attached is lifted together with the lower rail 3. Along with this, it is assumed that the vehicle floor 2 is deformed so as to turn up. In this case, the operating force required to unlock the relative movement is rapidly increased by the contact portion (inclined portion of the protruding portion) of the inner opening 14a that is made negative according to the second embodiment with the lock plate 39. Thus, the relative movement of the lower rail 3 and the upper rail 4 can be suppressed, and consequently the movement of the seat 5 in the front-rear direction can be suppressed.

  In the third embodiment, the seat 5 is mounted forward of the vehicle, but may be mounted rearward of the vehicle. For example, a large load in the rear of the vehicle is input to the seat 5 due to a vehicle collision (rear collision), and the front end of the upper rail 4 on one side to which the end of the seat belt SB (belt anchor) is attached is lifted together with the lower rail 3. Along with this, it is assumed that the vehicle floor 2 is deformed so as to turn up. In this case, the relative movement of the lower rail 3 and the upper rail 4 can be suppressed by abruptly increasing the operating force required for unlocking the relative movement in accordance with the third embodiment by the kerf. Directional movement can be suppressed.

-In the said 3rd Embodiment, the number of the locking holes 39b formed in the back of the locking hole 76 is arbitrary.
In each of the above embodiments, a locking groove opened in the width direction may be employed instead of the locking hole 39b of the lock plate 39. That is, it may be a comb-like lock plate.

In each of the above embodiments, the outer opening may not be formed in the outer flange 16 (guide portion 16a) of the upper rail 4 as long as it does not interfere with the lock plate 39.
In each of the above embodiments, the support shaft 22 may not be disposed at the center in the longitudinal direction of the long hole 35. For example, the support shaft 22 may be in contact with or close to the front end so that the long hole 35 can move only to the rear of the vehicle.

In each of the above embodiments, the support shaft 22 may be fixed directly to the upper rail 4 without the bracket 17.
In each of the above embodiments, the arrangement relationship between the bracket 17 (or the upper rail 4) and the lock lever 30, the support shaft 22, and the long hole 35 may be reversed. In this case, in the bracket 17 (or the upper rail 4), a slot-like slotted hole that is not communicated in the width direction may be employed instead of the slotted hole 35.

In each of the above embodiments, the wedge portion 53 is provided in the lock spring 50. However, instead of or in addition to this, the long hole 35 may be provided with a wedge portion.
In each of the above embodiments, the support shaft 22 is urged using a part of the lock spring 50 (wedge 53). However, the support shaft urging member (for example, wire work) provided separately from the lock spring 50 is used. The support shaft 22 may be biased by a spring or a leaf spring.

  In each of the above embodiments, the support shaft 22 is urged downward by the support shaft urging member (wedge portion 53), but if it intersects the extending direction (relative movement direction) of the long hole 35, The biasing direction is arbitrary.

In each of the above embodiments, the lower rail 3 may have a structure in which a plurality of plate materials are coupled by welding or the like. Moreover, the cross-sectional shape of the lower rail 3 is an example.
In each of the above embodiments, the upper rail 4 may have a structure in which a plurality of plate materials are coupled by welding or the like. Moreover, the cross-sectional shape of the upper rail 4 is an example, and what is necessary is just to have a pair of inner side flange in which the inner side opening was formed.

In each of the above embodiments, a lock lever in which the handle 31 and the lock plate 39 are integrally formed may be used.
-In each said embodiment, you may employ | adopt the shape of only the one extended part 51 as a lock spring. Or you may employ | adopt the extending part 51 which consists of several mutually independent as a lock spring.

-In each said embodiment, you may employ | adopt a coil spring, a leaf | plate spring, etc. as a lock spring.
In each of the above embodiments, for example, when a large load in the front-rear direction is input to the seat 5 due to a vehicle collision or the like, and the tip of the upper rail 4 on one side to which the terminal (belt anchor) of the seat belt SB is attached is lifted, It has been described that the lower rail 3 is lifted integrally with the upper rail 4 by the deformation of the vehicle floor 2. On the other hand, if the rigidity of the vehicle floor 2 is sufficient, when the tip of the upper rail 4 on one side is lifted, a deformation that causes the lower rail 3 and the upper rail 4 to peel off occurs. In this case, since the engagement sides of the inner openings 14a and the lock plate 39 are reversed, a shape for rapidly increasing the operating force for releasing the locking of the relative movement may be provided on the engagement side.

  In each of the above embodiments, the relative movement of the lower rail 3 and the upper rail 4 occurs when the tip of the upper rail 4 on one side is lifted due to the seat belt SB (seat belt load), that is, when the left and right upper rails 4 are twisted. It is said that it is effective in suppressing On the other hand, for example, an airbag device built in the seat cushion of the seat 5 is inflated instantaneously at the time of collision detection, and a restraining tool for preventing the occupant from jumping out due to slipping of the seat belt SB is lifted upward. When the bag (CAB) is mounted, it is effective to suppress the relative movement of the lower rail 3 and the upper rail 4 even when the cushion airbag is operated.

  DESCRIPTION OF SYMBOLS 3 ... Lower rail, 4 ... Upper rail, 6 ... Operation handle, 13 ... Flange, 13b ... Locking claw, 14 ... Inner flange, 14a ... Inner opening, 14e ... Inclined part (negative angle forming part, resistance generating part), 22 ... Support shaft, 30 ... lock lever (lock member), 31 ... handle, 35 ... long hole (long hole), 39 ... lock plate (flat plate part), 39b, 76 ... locking hole, 50 ... lock spring (biasing) Member, support shaft urging member), 53 ... wedge portion, 71 ... projecting portion (negative angle forming portion, resistance generating portion), 77 ... kerf.

Claims (5)

A pair of lower rails extending in the vehicle longitudinal direction and disposed on both sides in the width direction;
A pair of upper rails coupled to the lower rail so as to be movable in the vehicle longitudinal direction and having a pair of inner flanges arranged in parallel in the width direction, and both inner flanges are formed with inner openings communicating in the width direction. When,
The upper rail is pivotally connected to the upper rail around an axis extending in the width direction on the inner side in the width direction of the inner flanges, and has a flat plate portion that penetrates the inner openings in the width direction. A pair of lock members that selectively disengage the relative movement of the lower rail and the upper rail;
A pair of urging members for urging and urging the lock member to the side for locking the relative movement;
An operation handle that extends in the width direction and has both ends connected to the lock members and capable of transmitting an operation force for releasing the locking of the relative movement;
Each of the lock members has an axis extending in the width direction, and a support shaft fixed to one of the upper rail and the lock member is inserted into an elongated hole formed in the other so as to be movable in the vehicle front-rear direction. , By being urged by the support shaft urging member in a direction crossing the vehicle longitudinal direction, it is rotatably connected to the upper rail,
Movement in the longitudinal direction of the support shaft in the elongated hole when the load applied to the longitudinal direction of the vehicle is less than a predetermined value formed on at least one of the elongated hole and the support shaft urging member. A wedge portion that regulates,
A resistance generator that is provided at a contact portion between the inner opening and the flat plate portion when a load applied in at least one direction of the vehicle front-rear direction exceeds the predetermined value, and rapidly increases an operating force for releasing the locking of the relative movement. And a vehicle seat slide device. A pair of lower rails extending in the vehicle longitudinal direction and disposed on both sides in the width direction;
A pair of upper rails coupled to the lower rail so as to be movable in the vehicle longitudinal direction and having a pair of inner flanges arranged in parallel in the width direction, and both inner flanges are formed with inner openings communicating in the width direction. When,
The upper rail is pivotally connected to the upper rail around an axis extending in the width direction on the inner side in the width direction of the inner flanges, and has a flat plate portion that penetrates the inner openings in the width direction. A pair of lock members that selectively disengage the relative movement of the lower rail and the upper rail;
A pair of urging members for urging and urging the lock member to the side for locking the relative movement;
An operation handle that extends in the width direction and has both ends connected to the lock members and capable of transmitting an operation force for releasing the locking of the relative movement;
Each of the lock members has an axis extending in the width direction, and a support shaft fixed to one of the upper rail and the lock member is inserted into an elongated hole formed in the other so as to be movable in the vehicle front-rear direction. , By being urged by the support shaft urging member in a direction crossing the vehicle longitudinal direction, it is rotatably connected to the upper rail,
Movement in the longitudinal direction of the support shaft in the elongated hole when the load applied to the longitudinal direction of the vehicle is less than a predetermined value formed on at least one of the elongated hole and the support shaft urging member. A wedge portion that regulates,
And a pair of negative angle forming portions for negatively forming contact portions with the flat plate portions of the inner openings when a load applied in at least one direction of the vehicle longitudinal direction exceeds the predetermined value. Vehicle seat slide device. The vehicle seat slide device according to claim 2,
The negative angle portion is an inclined portion that is inclined so as to be separated from the flat plate portion side toward the rotation direction of the lock member from the locked state of the relative movement toward the side of locking the relative movement. A vehicle seat slide device characterized by the above. The vehicle seat slide device according to claim 2,
The negative angle portion is cantilevered by the inner opening, and protrudes along the rotation direction of the flat plate portion from the unlocked state of the relative movement to the side for locking the relative movement. A vehicle seat slide device characterized by the above. A pair of lower rails disposed on both sides in the width direction, having a pair of flanges extending in the vehicle front-rear direction and having a pair of flanges arranged side by side in the width direction, and a plurality of locking claws formed at the tips of both flanges. When,
It has a pair of inner flanges that are connected to the lower rail so as to be movable relative to each other, and are arranged in parallel in the width direction on the inner side in the width direction of each of the flanges. A pair of upper rails,
A flat plate portion rotatably connected to the upper rail around an axial line extending in the width direction on the inner side in the width direction of the inner flanges and penetrating the inner opening in the width direction, both side edges of the flat plate portion in the width direction The engaging holes into which the engaging claws can be inserted are respectively formed in the portions, and the relative movement of the lower rail and the upper rail is selectively performed by engaging and disengaging the engaging holes and the engaging claws with rotation. A pair of locking members for locking;
A pair of urging members for urging and urging the lock member to the side for locking the relative movement;
An operation handle that extends in the width direction and has both ends connected to the lock members and capable of transmitting an operation force for releasing the locking of the relative movement;
Each of the lock members has an axis extending in the width direction, and a support shaft fixed to one of the upper rail and the lock member is inserted into an elongated hole formed in the other so as to be movable in the vehicle front-rear direction. , By being urged by the support shaft urging member in a direction crossing the vehicle longitudinal direction, it is rotatably connected to the upper rail,
Movement in the longitudinal direction of the support shaft in the elongated hole when the load applied to the longitudinal direction of the vehicle is less than a predetermined value formed on at least one of the elongated hole and the support shaft urging member. A wedge portion that regulates,
The locking claw is formed so as to hold the locking claw formed at a contact portion with the inner openings of the flat plate portion when a load applied in at least one direction of the vehicle longitudinal direction exceeds the predetermined value. A vehicular seat slide device comprising a cut groove for inducing deformation of a locking hole.