JP2018052400A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat slide device capable of downsizing a lock mechanism and saving space, as well as enhancing attachment property of an operation handle.SOLUTION: A lock member 32 comprises: a base part 36 fixed onto a lower surface of a ceiling wall 18; an interim part 39 extending toward behind a seat between upper side walls 19, 19 in a pair, from the base part 36; a lock part 38 formed at a rear end part of the interim part 39; and a receiving part 42 formed in the base part 36. The release lever 33 comprises: a pair of side plate parts 40, 40 extending in a longitudinal direction of the seat between the pair of upper side walls 19, 19 and the interim part 39; and a release pressing part 46 formed with a rear end part of the release lever 33 connected with a rear end part of the pair of the side plate parts 40, 40. The release lever 33 further comprises: a support part 47 formed with the interim part of the release lever 33 connected with the pair of the side plates 40, 40; an operation part 48 formed at a front end part of the release lever 33; and a holding part 49 formed in the operation part 48.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a seat slide device for a vehicle seat.

  Conventionally, a seat slide device for a vehicle seat is known (for example, see Patent Document 1).

  This type of seat slide device includes a lower rail extending along the front-rear direction of the seat, an upper rail attached to the lower rail so as to be relatively movable, and a lock mechanism that fixes the upper rail at an arbitrary position on the lower rail. A pair of assemblies in which the upper rail and the lock mechanism are incorporated in the lower rail are arranged in parallel along the seat front-rear direction, and these assemblies are connected by an operation handle.

Japanese Patent Laid-Open No. 9-104266

  For example, in the structure of Patent Document 1, when the operating handle is attached to the lock mechanism, it is necessary to insert the operating handle deeply into the gap space between the lower rail and the upper rail, and it takes time to assemble the operating handle. There is a problem.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a seat slide device that can improve the assembly of an operation handle using a release lever and can reduce the size and space of a lock mechanism.

  The seat slide device according to the present invention includes a lower rail extending along the seat front-rear direction, an upper rail attached to the lower rail so as to be relatively movable along the seat front-rear direction, and a lock for fixing the upper rail at an arbitrary position on the lower rail. And a mechanism. The lower rail includes a bottom wall, a pair of lower side walls extending upward from both side ends in the seat width direction of the bottom wall, a pair of upper walls extending in a direction adjacent to each other from the upper end of the lower side wall, and a seat width of the upper wall A pair of hanging portions extending downward from the inner end of the direction. The upper rail extends downward from both ends of the ceiling wall and the seat width direction of the ceiling wall, and is separated from the pair of upper side walls disposed between the pair of hanging portions and the lower end portion of the upper side wall. And a pair of flange portions extending upward and disposed between the lower side wall and the hanging portion. The lock mechanism is a lock member that is open on the lower end of the hanging part and is configured by a comb tooth-shaped lock tooth and a leaf spring, and is arranged on the top wall so as to be swingable between a pair of upper side walls in the vertical direction. And a release lever for performing a lock release operation of the lock member. The lock member is formed at a base portion fixed to the lower surface of the top wall, an intermediate portion extending from the base portion between the pair of upper side walls to the rear of the seat, and a rear end portion of the intermediate portion, and is capable of engaging with lock teeth. And a lock portion having The lock member further includes a receiving portion that is formed at the base portion and functions as a pivot for a vertical movement of the release lever when the release lever comes into contact therewith. The release lever includes a pair of side plate portions extending along the seat longitudinal direction between the pair of upper side walls of the upper rail and the intermediate portion of the lock member, and a rear end portion of the pair of side plate portions at the rear end portion of the release lever. And a release pressing portion that is connected and disposed above the lock portion of the lock member. The release lever is formed at an intermediate portion of the release lever, and is provided at a support portion disposed below the receiving portion of the lock member, an operation portion that is formed at a front end portion of the release lever and is operated by an operation handle, and an operation portion. And a holding portion that is formed and holds the support portion at a holding position where the support portion contacts the receiving portion of the lock member.

  According to the seat slide device of the present invention, the release lever is used to improve the assemblability, and the vertical height of the release lever and the lock member can be reduced, and the release lever and the lock member are connected to the upper rail. It can be arranged in a space-saving manner.

1 is a perspective view of a seat slide device according to an embodiment of the present invention. It is a sectional side view of the seat slide device concerning the embodiment of the present invention. 1 is a longitudinal sectional view of a seat slide device according to an embodiment of the present invention. It is a disassembled perspective view of an assembly. It is a disassembled perspective view of a locking mechanism.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1, 4, and 5, arrow FR indicates the front of the seat (front of the vehicle), and arrow RR indicates the rear of the seat (rear of the vehicle).

  As shown in FIGS. 1 to 5, the seat slide device 1 is a manual type that manually adjusts the vehicle seat in the front-rear direction. The seat slide device 1 is installed on the floor surface of the vehicle, and is installed on the lower rail 2 extending along the front-rear direction of the seat and the back surface of the seat seat (not shown), and is relative to the lower rail 2 along the length direction. And an upper rail 3 attached to be movable. In addition, the seat slide device 1 has a guide ball 4 installed between the lower rail 2 and the upper rail 3 as a friction reducing mechanism for reducing the frictional resistance when the upper rail 3 moves relative to the lower rail 2. Is provided. A pair of assemblies 1a in which the upper rail 3, the guide ball 4, and the lock mechanism 6 described later are incorporated in the lower rail 2 are arranged in parallel along the front-rear direction between the lower surface of the vehicle seat and the floor surface of the vehicle. These assemblies 1a are coupled to each other by an operation handle 5 for unlocking the lock mechanism 6 so as to be operated simultaneously.

  The lower rail 2 includes a rectangular plate-like bottom wall 10 extending along the front-rear direction of the seat, and a pair of lower side walls 11, 11 extending upward from both side ends of the bottom wall 10 in the seat width direction. The lower rail 2 is formed of a bottom wall 10 and a pair of lower side walls 11, 11 and has a U-shaped cross section. The lower rail 2 is bent downward from the upper end of the lower side wall 11 and extends inward in the seat width direction, and downward from the inner end of the upper wall 12 in the seat width direction. It further has a pair of hanging portions 13 and 13 extending. The distance between the pair of hanging portions 13 extending in parallel with each other is set so that the upper rail 3 attached to the lower rail 2 can move.

  Further, the lower side wall 11 of the lower rail 2 has a lower side wall 14 extending obliquely upward in the seat width direction from the bottom wall 10 and an upper side wall 15 extending obliquely inward in the sheet width direction from the upper end portion of the lower side wall 14. . The bottom wall 10 and each lower side wall 14 are smoothly continuous by a lower lower arc portion 16 formed by an arc surface that is recessed outward in the seat width direction. The lower side wall 14 and the upper side wall 15 are smoothly continuous by a lower upper arc portion 17 formed by an arc surface recessed outward in the sheet width direction. And the bottom wall 10 of the lower rail 2 is fixed on the floor surface of a vehicle via a bolt etc. (not shown) as a lower fixing part at the time of fixing on the floor surface of a vehicle.

  The upper rail 3 includes a rectangular plate-like top wall 18 extending along the seat front-rear direction, and a pair of upper side walls 19, 19 extending downward from both side ends of the top wall 18 in the seat width direction. The upper rail 3 is formed of a top wall 18 and a pair of upper side walls 19, 19 and has an inverted U-shaped cross section. Further, the upper rail 3 further includes a pair of flange portions 20 and 20 that are bent in a direction away from the lower end portion of the upper side wall 19 and extend outwardly in the seat width direction. The dimensions of each part of the upper rail 3 are set so that the pair of upper side walls 19 and 19 and the pair of flange parts 20 and 20 are arranged so as to be movable in the lower rail 2 along the seat longitudinal direction.

  Further, the flange portion 20 of the upper rail 3 includes a lower flange portion 21 extending obliquely upward in the seat width direction from the upper side wall 19, and an upper flange portion extending obliquely upward in the seat width direction from the upper end portion of the lower flange portion 21. 22. On the outer surface (lower surface) in the seat width direction of the lower flange portion 21, an upper lower arc portion 23 formed by an arc surface recessed inward in the seat width direction is formed so as to face the lower arc portion 16. ing. On the outer surface in the seat width direction of the upper flange portion 22, an upper upper arc portion 24 configured by an arc surface recessed inward in the seat width direction is formed so as to face the lower upper arc portion 17. And the top wall 18 of the upper rail 3 is fixed to the back surface of a seat seat part via a volt | bolt etc. (not shown) as an upper fixing part at the time of fixing to the back surface of a seat seat part.

  The guide ball 4 that functions as a friction reducing mechanism includes a lower ball 25 and an upper ball 26 that are made of a metal spherical body, and a retainer 27 that holds the lower ball 25 and the upper ball 26. The retainer 27 holds the lower ball 25 such that it can roll between the lower lower arc portion 16 and the upper lower arc portion 23, and holds the upper ball 26 with the lower upper arc portion 17 and the upper upper arc portion 24. Hold the roll between. That is, the lower ball 25 is disposed between the lower lower arc portion 16 of the lower rail 2 and the upper lower arc portion 23 of the upper rail 3, and the lower upper arc portion 17 of the lower rail 2 and the upper rail 3 upper portion. An upper ball 26 is disposed between the upper arc portion 24 and the upper arc portion 24. The curvature radius of the arc surface in the lower lower arc portion 16 and the upper lower arc portion 23 is larger than the radius of the lower ball 25 even when the dimensions of the arc surfaces and the guide ball 4 vary. In consideration of dimensional variations, the radius is set to be larger than the radius of the lower ball 25 by a predetermined radius. Similarly, the radius of curvature of the arc surface in the lower upper arc portion 17 and the upper upper arc portion 24 is set larger than the radius of the upper ball 26 by a predetermined radius.

  In the guide ball 4 of the present embodiment, the outer diameter of the lower ball 25 is set to be larger than the outer diameter of the upper ball 26. The retainer 27 holds two lower balls 25 and two upper balls 26, a total of four. The guide balls 4 are disposed at two locations in the front-rear direction of the seat in the housing portion 28 surrounded by the bottom wall 10, the lower side wall 11, the upper wall 12, and the hanging portion 13, and are measured with respect to one assembly 1a. Located in four places.

  The seat slide device 1 further includes a lock mechanism 6 that fixes the upper rail 3 to an arbitrary position on the lower rail 2.

  The lock mechanism 6 opens at the lower end of the hanging portion 13 and has a plurality of slits 31 as the lock teeth 30 formed in a comb-teeth shape and a ceiling wall that can swing vertically between the pair of upper side walls 19 and 19. 18 and a lock member 32 disposed at the position 18. The lock mechanism 6 further includes a release lever 33 that performs an unlocking operation of the lock member 32 and a biasing member 34 that biases the release lever 33 in the unlocking direction.

  The lock member 32 includes a leaf spring 35, and a base portion 36 of the lock member 32 is fixed to the lower surface of the top wall 18 of the upper rail 3. A lock portion 38 having a lock claw 37 engageable with a lock tooth 30 formed along the seat longitudinal direction at the lower end of the hanging portion 13 of the lower rail 2 at the rear end of the portion of the lock member 32 extending from the base portion 36 to the rear of the seat. Is formed. Between the base portion 36 and the lock portion 38 of the lock member 32, an elastically deformable intermediate portion 39 having a narrow width so as to cut out side end surfaces on both sides in the sheet width direction is formed. These are disposed between a pair of side plate portions 40, 40 of a release lever 33 which will be described later. In addition, the base portion 36 of the lock member 32 is formed with a receiving portion 42 that contacts the release lever 33 and functions as a pivot point for the release lever 33 in the vertical direction. Further, an extension 41 extending from the base portion 36 of the lock member 32 to the front of the seat is formed, and a narrow portion 41a is formed at the tip thereof.

  The base portion 36 has an attachment hole 43 at the rear of the seat of the receiving portion 42, and is fixed by caulking through a lock fixing pin 45 in a lock fixing hole 44 formed in the top wall 18 of the upper rail 3. Here, the top wall 18 of the upper rail 3 is formed with a pair of slits along the connecting portion between the top wall 18 and the upper side wall 19 so as to sandwich the lock fixing hole 44. A peripheral portion of the lock fixing hole 44 is formed to be depressed downward with respect to the other top wall 18 portion. Accordingly, the head of the lock fixing pin 45 that is caulked and fixed is set so as not to protrude from the other upper surface of the top wall 18 of the upper rail 3. The lock portion 38 can swing up and down around the rear end of the base portion 36 by elastic deformation of the intermediate portion 39. When the lock portion 38 swings in the vertical direction, the lock claw 37 together with the lock portion 38 swings in the vertical direction so as to be fitted to and detached from the lock teeth 30.

  The release lever 33 has a pair of parallel side plate portions 40, 40 extending along the seat front-rear direction between the pair of upper side walls 19, 19 of the upper rail 3 and the intermediate portion 39 of the lock member 32. At the rear end portion of the release lever 33, a release pressing portion 46 formed by connecting the rear end portions of the pair of side plate portions 40, 40 and disposed above the lock portion 38 of the lock member 32 is formed. . At the intermediate portion of the release lever 33, a support portion 47 is formed which is formed by connecting the upper end surfaces of the pair of side plate portions 40, 40 and is disposed below the receiving portion 42 of the lock member 32. Further, an operating portion 48 that is operated by the operation handle 5 is formed at the front end portion of the release lever 33.

  The receiving portion 42 of the lock member 32 and the support portion 47 of the release lever 33 are formed such that at least one of the surfaces in contact with each other is formed in a cross-sectional arc shape in the front-rear direction of the seat, and the operation portion 48 of the release lever 33 is operated upward The release lever 33 can be rotated with the receiving portion 42 and the support portion 47 as the rotation fulcrum. In the present embodiment, a hole is formed in the release lever 33, and a protrusion that engages with the hole is formed in the lock member 32, and the release lever 33 does not move in the front-rear direction of the seat with respect to the lock member 32. Are engaged. A hole may be formed in the lock member 32, and a protrusion that engages with the hole may be formed in the release lever 33. Further, at least one of the contact surfaces of the protrusion and the hole may have a circular arc shape as a rotation fulcrum. Also good.

  The operating portion 48 of the release lever 33 is formed with a holding portion 49 that holds the support portion 47 at a holding position where the support portion 47 contacts the receiving portion 42 of the lock member 32. The holding portion 49 includes a bending protrusion 50 protruding from the side plate portion 40 toward the upper side wall 19, 19, and this bending protrusion 50 engages with an opening 51 formed at the front end portion of the upper side wall 19 of the upper rail 3. Yes. The opening 51 has a wide portion 52 that extends along the vertical direction and has a width in the vertical direction that allows the bending projection 50 to rotate upward from the holding position.

  Below the operating portion 48 of the release lever 33, the other end of the biasing member 34 whose one end is fixed to the upper rail 3 is disposed so as to bias the operating portion 48 in a direction to rotate upward. The urging member 34 has an urging force weaker than the urging force of the lock member 32, and the urging force urges the support portion 47 so as to always keep in contact with the receiving portion 42 of the lock member 32. ing.

  The operation handle 5 is composed of a pipe-like member, and extends in parallel to the rear of the seat from the handle operation portion 53 disposed along the seat width direction and both ends of the handle operation portion 53, and the release lever 33 is actuated. It is formed in a U shape by a handle arm portion 54 that operates the portion 48. A recess 55 is formed on the lower surface of the handle arm portion 54 of the operation handle 5. When the rear end portion of the handle arm portion 54 is inserted from the front side of the seat toward the rear side of the seat so as to pass through the operating portion 48 and the biasing member 34, the opening of the rear end portion of the handle arm portion 54 is opened. The narrow end portion 41a of the lock member 32 is inserted therein, and the rear end portion end surface of the handle arm portion 54 abuts against the front end surface of the extension portion 41 of the lock member 32, and at the same time provided at the other end of the biasing member 34. The engaging portion 57 is engaged with the recess 55 provided on the lower surface of the handle arm portion 54, so that the operation handle 5 is held so as not to move in the seat front-rear direction.

  The urging member 34 is formed by bending a linear material at a plurality of locations, and includes a fixing portion 56, a locking portion 57, a lowering portion 58, and an urging arm portion 59.

  A pair of fixing portions 56 are formed at both ends of the linear material. As shown in FIG. 2, the fixing portions 56 are arranged on both sides of the peripheral portion of the lock fixing hole 44 of the top wall 18, and are connected to the top wall 18 of the upper rail 3. The urging member 34 is fixed to the upper rail 3 by being sandwiched between the base portion 36 of the lock member 32. The locking portion 57 is formed in a portion where the linear material is folded in half, and is engaged with the concave portion 55 of the operation handle 5 to urge the operation handle 5 upward and to lock the operation handle 5. . A lowering portion 58 and an urging arm portion 59 are formed at a portion between the fixing portion 56 and the locking portion 57 in the linear material, and the lowering portion 58 extends obliquely downward from the fixing portion 56 toward the front of the seat. The urging arm portion 59 extends obliquely upward from the descending portion 58 toward the front of the seat.

  The urging force of the urging member 34 is set to be smaller than the urging force of the leaf spring 35 that urges the release lever 33 in the locking direction, and the operation handle 5 is rotated around the narrow portion 41a of the lock member 32. The supporting portion 47 is urged upward as a fulcrum, the operating portion 48 of the release lever 33 is urged upward via the operation handle 5, and the support portion 47 is held in a holding position where it abuts on the receiving portion 42 of the lock member 32. .

  Below, the effect by this embodiment is demonstrated.

  (1) A seat slide device 1 according to the present embodiment includes a lower rail 2 that extends along the seat longitudinal direction, an upper rail 3 that is attached to the lower rail 2 so as to be relatively movable along the seat longitudinal direction, and an upper rail 3. And a locking mechanism 6 that fixes the lower rail 2 at an arbitrary position. The lower rail 2 has a bottom wall 10 and a pair of lower side walls 11, 11 extending upward from both side ends of the bottom wall 10 in the seat width direction. The lower rail 2 includes a pair of upper walls 12 and 12 extending in a direction close to each other from the upper end portion of the lower side wall 11 and a pair of hanging portions 13 and 13 extending downward from the inner end portion in the seat width direction of the upper wall 12. Also have. The upper rail 3 includes a top wall 18 and a pair of upper side walls 19, 19 that extend downward from both end portions of the top wall 18 in the seat width direction and are disposed between the pair of hanging portions 13, 13. The upper rail 3 further includes a pair of flange portions 20, 20 extending in a direction away from the lower end portion of the upper side wall 19 and extending upward and disposed between the lower side wall 11 and the hanging portion 13. The locking mechanism 6 is configured by a locking tooth 30 formed in a comb-teeth shape and a leaf spring 35, which is open at the lower end of the hanging portion 13, and can be pivoted vertically between a pair of upper side walls 19 and 19. A lock member 32 disposed on the wall 18 and a release lever 33 for performing an unlock operation of the lock member 32 are provided. The lock member 32 is formed at a base portion 36 fixed to the lower surface of the top wall 18, an intermediate portion 39 extending rearward from the base portion 36 between the pair of upper side walls 19, 19, and a rear end portion of the intermediate portion 39. A lock portion 38 having a lock claw 37 that can be engaged with the lock teeth 30 is provided. The lock member 32 further includes a receiving portion 42 that is formed on the base portion 36 and that functions as a pivot point of the release lever 33 in the up-down direction when the release lever 33 abuts. The release lever 33 includes a pair of side plate portions 40, 40 extending along the seat longitudinal direction between the pair of upper side walls 19, 19 of the upper rail 3 and the intermediate portion 39 of the lock member 32, and the rear end of the release lever 33. And a release pressing portion 46 which is formed by connecting the rear end portions of the pair of side plate portions 40, 40 to the portion and disposed above the lock portion 38 of the lock member 32. The release lever 33 is formed by connecting the upper end portions of the pair of side plate portions 40, 40 to the intermediate portion of the release lever 33, and the support portion 47 disposed below the receiving portion 42 of the lock member 32 and the release lever 33. An operating portion 48 that is operated by the operation handle 5 and a holding portion 49 that is formed in the operating portion 48 and holds the support portion 47 in a holding position where it abuts against the receiving portion 42 of the lock member 32. Also have.

  Since the operation handle 5 is assembled to the release lever 33 that is pre-assembled to the upper rail 3 together with the lock member 32, it is not necessary to insert the operation handle 5 deeply into the gap space between the lower rail 2 and the upper rail 3. 5 can be improved. Further, since the release lever 33 is only fixed by the lock fixing pin 45 in a state where the lock member 32 is inserted between the pair of side plate portions 40, 40, the assembling property of the lock member 32 and the release lever 33 is also lowered. Never do.

  Further, the side plate portion 40 of the release lever 33 extends between the upper side wall 19 of the upper rail 3 and the intermediate portion 39 of the lock member 32 along the seat front-rear direction, and the release pressing portion 46, the support portion 47, and the operation portion 48. Are arranged substantially in a straight line. For this reason, the vertical height of the release lever 33 can be reduced, and the release lever 33 can be disposed on the upper rail 3 in a space-saving manner.

  Further, in order to prevent the holding portion 49 of the release lever 33 from rotating downward from the holding position of the release lever 33, the height in the vertical direction is set at the intermediate portion 39 of the release lever 33 where the required height tends to increase. The thickness can be reduced. Further, since there is no holding portion 49 below the release lever 33, a wide vertical space can be secured in the lower rail 2.

  (2) The lock mechanism 6 includes a biasing member 34 that biases the operating portion 48 of the release lever 33 in the unlocking direction, and the biasing force of the biasing member 34 locks the release pressing portion 46 of the release lever 33 in the locking direction. It is smaller than the urging force of the leaf spring 35 that urges to.

  Since the support of the release lever 33 and the operation handle 5 is achieved by the three parts of the biasing member 34, the release lever 33, and the operation handle 5, the number of parts can be reduced, and each part can be reduced in size and assembled. It is possible to improve the attachment. In addition, since the operating portion 48 of the release lever 33 is always urged in the unlocking direction, the support portion 47 of the release lever 33 is in a holding position in contact with the receiving portion 42 of the lock member 32. The release lever 33 can be prevented from rattling.

  (3) The rear end connection portion of the operation handle 5 is rotatably supported by the extension portion 41 of the lock member 32 at the rear end portion on the rear side of the seat, and the upper and left and right surfaces of the operation portion 48 of the release lever 33 , And the recessed portion 55 is formed on the lower surface on the front side of the seat with respect to the enclosed portion, and the recessed portion 55 is formed at the front end portion of the urging member 34. A locking portion 57 is formed to engage with and lock the operation handle 5.

  The rear end connecting portion of the operation handle 5 that is rotatably supported by the lock member 32 is prevented from coming off by engaging the engaging portion 57 with the recess 55, and at the rear end portion on the rear side of the seat, the lock member 32 is rotatably supported by the extension part 41 of 32. Therefore, when the operation handle 5 is turned in the unlocking direction, the operating portion 48 of the release lever 33 is pushed by the operation handle 5 and turned in the unlocking direction. The operation handle 5 is urged in the unlocking direction by the urging force of the locking portion 57 at the position of the recess 55, and the release lever 33 is urged in the unlocking direction via the operation handle 5. . For this reason, the release lever 33 and the operation handle 5 can be supported and prevented from rattling with one urging member 34, so that the number of parts can be reduced, and each part can be reduced in size and improved in assembly. Can be achieved.

  By the way, the seat slide device of the present invention has been described by taking the above-described embodiment as an example. However, the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Seat slide apparatus 2 Lower rail 3 Upper rail 5 Operation handle 6 Lock mechanism 10 Bottom wall 11 Lower side wall 12 Upper wall 13 Hanging part 18 Top wall 19 Upper side wall 20 Flange part 30 Lock tooth 32 Lock member 33 Release lever 34 Energizing member 35 Leaf spring 36 Base portion 37 Lock claw 38 Lock portion 39 Intermediate portion 40 Side plate portion 41 Extension portion 42 Receiving portion 46 Release pressing portion 47 Support portion 48 Actuating portion 49 Holding portion 57 Locking portion

Claims (3)

A lower rail extending along the seat longitudinal direction;
An upper rail attached to the lower rail so as to be relatively movable along the seat longitudinal direction;
A locking mechanism for fixing the upper rail to an arbitrary position on the lower rail,
The lower rail includes a bottom wall, a pair of lower side walls extending upward from both side end portions in the seat width direction of the bottom wall, a pair of upper walls extending in a direction approaching each other from an upper end portion of the lower side wall, A pair of hanging portions extending downward from the inner end of the wall in the sheet width direction,
The upper rail extends downward from both sides of the ceiling wall in the seat width direction of the ceiling wall, and a pair of upper sidewalls disposed between the pair of hanging portions, and a lower end portion of the upper sidewall. A pair of flange portions extending in a separating direction and extending upward and disposed between the lower side wall and the hanging portion;
The locking mechanism is configured by a comb-shaped locking tooth that opens at the lower end of the drooping portion and a leaf spring, and is disposed on the top wall so as to be swingable vertically between the pair of upper side walls. And a release lever that performs a lock release operation of the lock member,
The lock member is formed at a base portion fixed to the lower surface of the top wall, an intermediate portion extending rearward from the base portion between the pair of upper side walls, and a rear end portion of the intermediate portion, and the lock teeth A lock portion having an engageable lock claw, and a receiving portion that is formed on the base portion and that functions as a pivot point for the release lever in contact with the release lever,
The release lever includes a pair of side plate portions extending along a seat front-rear direction between the pair of upper side walls of the upper rail and the intermediate portion of the lock member, and the pair of side plates at a rear end portion of the release lever. It is formed by connecting the rear end portions of the side plate portions, and connecting the upper end portions of the pair of side plate portions to the release pressing portion disposed above the lock portion of the lock member and the intermediate portion of the release lever. A support portion formed below the receiving portion of the lock member, an operation portion formed at a front end portion of the release lever and operated by an operation handle, and formed in the operation portion, the support portion. And a holding portion that holds the holding member in a holding position that contacts the receiving portion of the lock member.   The lock mechanism includes a biasing member that biases the operating portion of the release lever in the unlocking direction, and the biasing force of the biasing member biases the release pressing portion of the release lever in the locking direction. The seat slide device according to claim 1, wherein the seat slide device is smaller than a biasing force of the spring.   The rear end connection portion of the operation handle is rotatably supported by an extension portion formed to extend from the base portion of the lock member to the front side of the seat at the rear end portion on the rear side of the seat, and the release lever At least the upper surface and the left and right surfaces are enclosed by the operating portion, and are engaged with each other at the enclosed portion, and a recess is formed on the lower surface on the front side of the seat from the enclosed portion, and the biasing member The seat slide device according to claim 2, wherein a locking portion that engages with the concave portion to lock the operation handle is formed at a front end portion of the seat.

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