JP2018058576A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components by integrating energization means for energizing a lock member in a lock direction with energization means for energizing an operation handle.SOLUTION: A lock member 117 arranged in a release lever 131 fixes a fixing section 119 to an upper top wall 105a of an upper rail 105 by a fixture 115. The release lever 131 oscillates forward and backward around an oscillation fulcrum section 151 with respect to the lock member 117 and releases locking of a lower rail 103 when a release pressing section 153 on a rear side presses the vicinity of a lock tooth 125 of the lock member 117 downward. In the lock member 117, a rear elastic deformation section 123 energizes the lock tooth 125 in a lock direction, and a front elastic deformation section 141 energizes an operation handle 133 upward. The lock member 117 is constituted as a leaf spring member in which the fixing section 119, the rear elastic deformation section 123, and the front elastic deformation section 141 are integrated.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a seat slide device provided in a vehicle.

  A seat slide device for a vehicle is provided in such a manner that an upper rail fixed to a seat is slidably movable with respect to a lower rail fixed to a vehicle body, and a lock tooth of a lock member attached to the upper rail is engaged with a lock groove of the lower rail to be locked. It becomes. The lock member of Patent Document 1 is provided with an opening in a flange that is bent downward in front of the fixed portion to the upper rail, and an operation handle is inserted into the opening from the front, and is passed through a through hole near the center to the upper portion of the lock member. The tip of the operation handle is positioned. The lock member is formed of an elastic body that biases in the lock direction. By operating the operation handle upward, the distal end side displaces the lock member downward, and the lock is released. The operation handle is reduced in diameter at the portion inserted into the opening of the flange, and further provided with a stopper at the tip, so that the front-rear direction with respect to the lock member is fixed.

  In the seat slide device of Patent Document 1, in order to engage the lock member and the operation handle, the operation handle has to be inserted deep into the gap space. At this time, the tip of the operation handle is inserted into the two holes of the lock member. It is very bad to install. In Patent Document 1, since the lock member is directly rotated by the operation handle, the operating angle of the operation handle cannot be increased. Therefore, in Patent Documents 2 and 3 where the operation handle also serves as the release lever, in Patent Documents 2 and 3, the operation handle and the lock release lever are provided separately, and the operation handle and the lock release lever are connected in the vicinity of the rail front end. A structure has been proposed.

Japanese Patent Laid-Open No. 9-104266 JP 2011-230715 A JP 2012-126184 A

  However, in the techniques of Patent Documents 2 and 3, in order to connect the operation handle to the end portion of the lock release lever, a biasing unit that biases the lock member in the locking direction and a biasing unit that biases the operation handle upward. Need to be provided separately, which increases the number of parts.

  Accordingly, an object of the present invention is to reduce the number of parts by integrating the biasing means for biasing the lock member in the lock direction and the biasing means for biasing the operation handle.

  The present invention relates to a lower rail that extends along the longitudinal direction of the vehicle, an upper rail that moves relative to the longitudinal direction of the lower rail, and a locked portion that is attached to the upper rail and formed on the lower rail. A lock member having a lock portion biased in the lock direction, a release lever, and an operation handle are provided. The release lever is provided at a position overlapping with the lock member in the longitudinal direction of the upper rail, and is a release that can press the periphery of the lock portion of the lock member so as to release the engagement of the lock portion with the locked portion. A pressing portion; an operating portion that is operated by an unlocking operation of the operation handle; and a swing fulcrum portion provided between the releasing pressing portion and the operating portion. The operation handle is disposed below the operation portion of the release lever, and is supported rotatably with respect to the upper rail in front of the swing fulcrum portion of the release lever. Actuate the part. The lock member includes a base portion that is provided with the swing fulcrum portion and is fixed to the upper rail, a rear bias portion that is positioned rearward of the base portion and biases the lock portion in a locking direction, and a base portion. And a front spring portion that is set forward and biases the operation handle upward and has a biasing force set to be weaker than that of the rear biasing portion. And

  According to the present invention, the lock member is configured by a leaf spring that integrally includes an urging unit that urges the locking handle and an urging unit that urges the operation handle, thereby reducing the number of parts. Can do.

It is a perspective view which shows the state which assembled | attached the locking member, the release lever, and the operation handle to the upper rail of the seat slide apparatus concerning the 2nd Embodiment of this invention. It is sectional drawing of FIG. It is a top view which shows only the upper rail of FIG. 2 in AA cross section. It is sectional drawing containing the lower guide ball and upper guide ball which are arrange | positioned between an upper rail and a lower rail. FIG. 5 is a perspective view of a ball retainer including a lower guide ball and an upper guide ball in FIG. 4 and a lower rail. It is a perspective view of an upper rail. It is a perspective view of a locking member. It is a perspective view of a release lever. It is the front view seen from the front of the release lever. It is a perspective view which shows the state which assembled | attached the lock member to the cancellation | release lever also including an operation handle. It is a perspective view which shows a part of operation handle. FIG. 3 is a cross-sectional view taken along line B-B in which the upper rail and the lock member in FIG. 2 are omitted. It is a side view which shows the recessed part formed in the side wall of an upper rail. It is a perspective view which shows the state which assembled | attached the lock member, the release lever, and the operation handle to the upper rail of the seat slide apparatus concerning the 1st Embodiment of this invention. It is sectional drawing of FIG. It is a top view which shows only the upper rail of FIG. 15 in CC cross section. It is sectional drawing containing the lower guide ball and upper guide ball which are arrange | positioned between an upper rail and a lower rail. FIG. 18 is a perspective view of a ball retainer including a lower guide ball and an upper guide ball in FIG. 17 and a lower rail. It is a perspective view of an upper rail. It is a perspective view of a locking member. It is a perspective view of a fixing tool. It is a side view of a fixing tool. It is an enlarged view of the D section of FIG. It is EE sectional drawing of FIG. 22A. It is a perspective view of a release lever. It is a top view of a release lever. It is a side view of a release lever. It is the front view seen from the front of the release lever. It is a perspective view which shows the state which assembled | attached the lock member to the cancellation | release lever also including an operation handle. It is a perspective view of an operation handle. It is a top view which shows a part of operation handle. It is a side view of an operation handle. It is FF sectional drawing of FIG. 25C. It is GG sectional drawing of FIG. 25C.

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

  The seat slide apparatus 101 according to the first embodiment of the present invention shown in FIGS. 14 to 17 is a manual type that manually adjusts the vehicle seat in the front-rear direction. The seat slide device 101 is installed on the floor of the vehicle, and is installed on the lower rail 103 that extends along the vehicle front-rear direction, and on the back surface of the seat seat (not shown), and extends along the longitudinal direction of the lower rail 103. And an upper rail 105 which is assembled so as to be relatively movable in the lower rail 103. The lower rail 103 and the upper rail 105 constitute a rail body 106, and a pair of left and right rail bodies 106 are provided. In FIG. 16, the lower rail 103 is omitted. In the following description, “front” is the left front side of the vehicle in FIGS. 15 and 16, and “rear” is the right rear side of the vehicle in FIGS.

  As shown in FIG. 17, the lower rail 103 includes a lower bottom wall 103a having a rectangular plate shape extending in the vehicle front-rear direction. From both end edges of the lower bottom wall 103a in the vehicle width direction, a pair of left and right lower outer walls 103b rise from the lower bottom wall 103a so as to be inclined slightly outward. A lower oblique wall 103c is formed between the lower ends of the pair of left and right lower outer walls 103b and the lower bottom wall 103a. A pair of left and right lower upper walls 103d extending in parallel with the lower bottom wall 103a from the upper end edges of the pair of left and right lower outer walls 103b is provided.

  A pair of left and right lower inner walls 103e is provided to hang downward from the inner end edges of the pair of left and right lower upper walls 103d toward the lower bottom wall 103a. In addition, the space | interval between the lower inner side walls 103e which oppose in a mutually parallel state is set so that the upper rail 105 accommodated in the lower rail 103 can move.

  The upper rail 105 includes an upper top wall 105a having a rectangular plate shape extending in the longitudinal direction of the vehicle body. A pair of left and right upper side walls 105b hang downward from both ends of the upper ceiling wall 105a in the vehicle width direction. Upper lower inclined walls 105c rise obliquely upward and outward from the lower edges of the upper side walls 105b. From the upper end edges of the pair of left and right upper lower inclined walls 105c, the upper upper inclined wall 105e rises obliquely upward toward the lower upper wall 103d via the bent portion 105d.

  A lower guide ball 107 is rotatably arranged between a lower circular arc portion 103f between the lower bottom wall 103a and the lower inclined wall 103c of the lower rail 103 and an upper lower inclined wall 105c of the upper rail 105. An upper guide ball 109 is rotatably arranged between an upper arc portion 103g between the lower outer wall 103b and the lower upper wall 103d of the lower rail 103 and an upper upper inclined wall 105e of the upper rail 105.

  As shown in FIG. 18, the lower guide ball 107 and the upper guide ball 109 are rotatably supported by a ball retainer 111 that is omitted in FIG. The ball retainer 111 supports a total of four lower guide balls 107 and two upper guide balls 109. The ball retainer 111 in a state of supporting the lower guide ball 107 and the upper guide ball 109 is a housing portion 113 (FIG. 17) surrounded by the lower outer wall 103b, the lower inclined wall 103c, the lower upper wall 103d, and the lower inner wall 103e. Inside, two places are arranged in the front and rear, and a total of four places are arranged with respect to the pair of left and right rail bodies 106.

  As shown in FIG. 15, a lock member 117 is fixed to the upper top wall 105 a on the front side of the upper rail 105 by a fixing tool 115 such as a rivet. The lock member 117 is configured by a plate-like spring member. The lock member 117 includes a fixing hole 119 a into which the fixing tool 115 is inserted in the fixing portion 119 fixed by the fixing tool 115. Here, a peripheral portion of the fixing hole 105f is formed in the upper top wall 105a of the upper rail 105 so as to be recessed downward with respect to the other upper ceiling wall 105a. Thereby, the head of the fixing tool 115 is set so as not to protrude from the other upper surface of the upper ceiling wall 105a of the upper rail 105.

  FIG. 21A and FIG. 21B show the fixture 115 before installation. As shown in FIG. 22A, which is an enlarged view of the D portion in FIG. 15, the fixing tool 115 is formed at the insertion shaft portion 115a inserted from below into the fixing holes 119a and 105f, and the lower portion of the insertion shaft portion 115a. A large-diameter portion 115b having a diameter larger than that of the insertion shaft portion 115a and a flange portion 115c formed on the lower portion of the large-diameter portion 115b opposite to the insertion shaft portion 115a are provided. The flange portion 115c constitutes a protrusion that protrudes toward the side.

  As shown in FIG. 22B, which is an EE cross-sectional view of FIGS. 22A and 22A, the flange portion 115c is provided below the locking protrusion 147e provided on the left and right side walls 147 of the release lever 131 shown in FIG. Is located. As shown in FIG. 23A, the locking projection 147e is located slightly forward from the center position in the front-rear direction, and is formed by being cut and raised inward from a side wall 147 that is a part of the release lever 131. is there.

  As shown in FIG. 22B, the locking projection 147e has an upper portion connected to the side wall 147, a lower portion cut with respect to the side wall 147, and the cut lower end surface 147e1 facing the upper surface 115c1 of the flange portion 115c. Yes. A gap T is formed between the lower end surface 147e1 and the upper surface 115c1. By providing the clearance T, it is possible to swing in the front-rear direction with the swinging fulcrum 151 of the part where the fixing tool 115 of the release lever 131 is provided as a fulcrum.

  A fixing portion 119 of the lock member 117 shown in FIG. 20 extends in the front-rear direction substantially parallel to the upper ceiling wall 105a shown in FIG. 15, and a rear inclined portion 121 that inclines backward and obliquely downward from the rear end of the fixing portion 119. It is formed. A rear elastic deformation portion 123 extending from the rear end of the rear inclined portion 121 toward the rear substantially parallel to the fixed portion 119 is formed. As shown in FIGS. 16 and 20, there are six lock teeth 125 as lock portions protruding in the left and right sides at a substantially equal interval in the front-rear direction, as shown in FIGS. One is provided.

  As shown in FIG. 19, in the vicinity of the center of the upper rail 105 in the front-rear direction, three lock tooth fitting holes 129 are formed on the left and right sides along the front-rear direction from the left and right upper side walls 105 b to the upper lower inclined walls 105 c. doing. As shown in FIG. 15, the lock teeth 125 of the lock member 117 enter the lock teeth fitting hole 129 from below.

  On the other hand, as shown in FIG. 18, a plurality of lock grooves 127 serving as locked portions are provided along the front-rear direction at positions other than the vicinity of the front and rear portions of the left and right lower inner walls 103 e of the lower rail 103. When the lock teeth 125 of the lock member 117 enter the lock groove 127 from below while being positioned in the lock tooth fitting hole 129, the lock member 117 is locked with respect to the lower rail 103. Thereby, the upper rail 105 to which the lock member 117 is attached is restricted from moving in the front-rear direction with respect to the lower rail 103.

  With the lock member 117 attached to the upper rail 105, the state where the lock teeth 125 enter the lock groove 127 is maintained by the rear elastic deformation portion 123 applying an elastic force upward. From this state, by operating the operation handle 133 shown in FIG. 15 upward, the rear end portion 123a of the lock member 117 is pushed downward via the release lever 131, and the lock is released. The operation handle 133 is inserted into the upper rail 105 from the front and is disposed so as to be interlocked with the release lever 131.

  As shown in FIGS. 16 and 20, the lock member 117 includes projecting portions 119 b serving as supported portions projecting sideways from the left and right side portions at positions corresponding to the fixing holes 119 a of the fixing portion 119. ing. The protruding portion 119b protrudes laterally with the same thickness as the plate thickness of the lock member 117 including the fixing portion 119, and has a rectangular shape in plan view. As shown in FIGS. 15 and 20, the lock member 117 has a front first inclined portion 135 formed on the front side opposite to the rear inclined portion 121 with the fixing portion 119 as a boundary. The front first inclined portion 135 is inclined so as to be lower toward the front.

  An operation handle receiving portion 137 extending substantially in parallel with the fixed portion 119 is formed forward from the front end (lower end) of the first front inclined portion 135, and a second front inclined portion extending obliquely forward from the front end of the operation handle receiving portion 137. 139 is formed. The front end portion 167a of an arm portion 167 (described later) of the operation handle 133 is brought into contact with the upper surface of the operation handle receiving portion 137 so as to be placed thereon. A front elastic deformation portion 141 extending from the front end of the front second inclined portion 139 toward the front and substantially parallel to the operation handle receiving portion 137 is formed.

  A front end claw portion 145 that is bent upward is formed at the front end of the front elastic deformation portion 141. As shown in FIGS. 15 and 24, the front end claw portion 145 is engaged with a recess 133 a formed on the lower surface of the operation handle 133 from below. The front elastic deformation portion 141 presses the concave portion 133a upward via the front end claw portion 145. The pressing force against the concave portion 133 a of the front elastic deformation portion 141 is set to be weaker than the pressing force to the lock groove 127 by the lock teeth 125 of the rear elastic deformation portion 123. As a result, a state where the lower end of the operation handle 133 is in contact with the operation handle receiving portion 137 of the lock member 117 is ensured.

  As shown in FIG. 15, the lock member 117 is attached to the upper rail 105, and the front side of the front elastic deformation portion 141 from the front to rear direction protrudes forward from the upper rail 105.

  As shown in FIGS. 23A to 23D, the release lever 131 includes a left and right side wall 147 and an upper wall 149 that connects the upper ends of the left and right side walls 147 in a region near the rear end of the left and right side walls 147. I have. The lock member 117 is disposed between the left and right side walls 147 of the release lever 131 except for the vicinity of the front portion and the vicinity of the rear portion. That is, the release lever 131 is provided at a position where the lock member 117 and the upper rail 105 overlap in the longitudinal direction and the vertical direction.

  A recess 147a as a support portion is formed at the upper end of the side wall 147 on the front side of the intermediate position in the front-rear direction of the release lever 131. The recess 147a is located above the locking projection 147e and has an arcuate concave curved surface with the upper part opened. As shown in FIG. 24, the recess 147a is disposed below the left and right protrusions 119b of the lock member 117, and the lower part of the protrusion 119b is engaged with the recess 147a. The protrusion 119b of the lock member 117 and the recess 147a of the release lever 131 constitute a swing fulcrum 151 when the front and rear of the release lever 131 swings up and down. The swing fulcrum portion 151 coincides with the fixing portion of the lock member 117 with respect to the upper rail 105 in the front-rear direction.

  The release lever 131 includes a release pressing portion 153 that extends rearward from the upper wall 149. A curved convex portion 153a that protrudes in a downward curved manner is formed in the lower portion on the distal end side of the release pressing portion 153. The curved convex portion 153 a is in contact with the upper surface of the rear end portion 123 a of the rear elastic deformation portion 123 in the lock member 117. On the upper wall 149, a protrusion 149a formed by cutting and raising upward is formed. The protrusion 149a serves as a stopper that contacts the upper ceiling wall 105a of the upper rail 105 when the release lever 131 swings and rotates counterclockwise in FIG. 15 with the swinging fulcrum 151 serving as a fulcrum.

  The upper ends of the front end portions of the release lever 131 are connected by a front upper wall 157. A notch 147f is formed in the lower part of the front end of the left and right side walls 147, and a bent piece 147g is formed on the upper part of the left and right notches 147f so as to bend toward the opposite sides from the side walls 147. ing. The ends of the left and right bent pieces 147g are separated from each other, and a gap is formed between them. The release lever 131 is formed with a restricting projection 147h for restricting the downward movement of the operation handle 133 at the lower front end of the left and right side walls 147 behind the notch 147f.

  The bending piece 147g constitutes an action portion (actuating portion 159) to which a force when the operation handle 133 is rotated in the upward unlocking direction is applied from below. That is, the release lever 131 has an action part (actuating part 159) to which a force is applied when the operation handle 133 is operated, on the front side opposite to the rear release pressing part 153 with the rocking fulcrum part 151 as a boundary. I have. The bending portion 147g, the regulation protrusion 147h, and a first convex portion 147c as a push-in portion to be described later constitute an operating portion 159. The actuating portion 159 of the release lever 31 is located in front of the rocking fulcrum portion 151 opposite to the rear release pressing portion 153.

  As shown in FIG. 25A, the operation handle 133 extends in the vehicle width direction by connecting a pair of left and right arm portions 167 provided corresponding to the pair of left and right rail bodies 106 shown in FIG. And a generally U-shape. The pair of arm portions 167 extends in the front-rear direction and is inserted into the left and right upper rails 105 from the front end. The gripper 168 grips the operation handle 133 when the occupant operates it.

  As shown in FIGS. 15 and 24, the arm portion 167 has a rear end portion inserted between the left and right side walls 147 of the release lever 131, and as described above, the rear end portion 167 a of the lock member 117. The operation handle receiving portion 137 is in contact with the upper surface. The entire arm portion 167 including the grip portion 168 is formed of a cylindrical member, and an operation portion 169 having a shape in which the cylindrical portion is crushed from above and below is provided on the rear side of the portion including the concave portion 133a described above.

  As shown in FIGS. 25A to 25E, the operation portion 169 has a substantially hat-shaped cross section at an intermediate portion 169b on the front side of the rear end portion 169a. That is, the intermediate portion 169b includes an upper surface 169b1, a side surface 169b2 extending downward from the left and right ends of the upper surface 169b1, and a flange 169b3 extending substantially parallel to the upper surface 169b1 from the lower end of the left and right side surfaces 169b2 toward the left and right sides. ing. The hat-shaped lower part is opened and is an accommodation recess 170 that accommodates the front elastic deformation part 141 of the lock member 117.

  The flange 169b3 is inserted between the bent piece 147g of the release lever 131 and the restricting protrusion 147c. In this state, a force when the operation handle 133 is operated upward is applied to the lower surface of the bent piece 147g from below through the flange 169b3. The interval between the left and right bent pieces 147g is such that the portion between the left and right bent pieces 147g enters between the left and right bent pieces 147g so that the portion having the side surface 169b2 located above the flange 169b3 is inserted between the left and right side surfaces 169b2. It is wider than the interval.

  As shown in FIGS. 25D and 25E, the intermediate portion 169b of the operation portion 169 is wide on the front end portion side where the front end claw portion 145 of the lock member 117 enters with respect to the width of the upper surface 169b1 (the vertical width in FIG. 25B). The rear side is narrower than the front end side. The rear end portion 169a of the operation portion 169 includes a rear end upper surface 169a1 and a rear end side surface 169a2, does not include a flange, and has a substantially inverted U-shape downward. The width of the rear end upper surface 169a1 (the vertical width in FIG. 25B) is substantially equal to the upper surface 169b1 of the portion shown in FIG. 25D, and is wider than the width of the side surface 169b2 (the vertical width in FIG. 25C). It has become.

  As shown in FIGS. 23A and 23B, the release lever 131 is provided with a first convex portion 147c at a position facing the rear end portion 169a of the operation portion 169. The first convex portion 147c protrudes inwardly from the side wall 147 of the release lever 131, and in the assembled state of the operation handle 133 with the front end claw portion 145 engaged with the concave portion 133a, the first end portion 169a Slightly spaced from the end face. A second convex portion 147d that protrudes inward from the side wall 147 is provided on the side wall 147 in front of and above the first convex portion 147c. The second convex portion 147d is provided at a position above the flange 169b3 and away from the flange 169b3 in a holding state when the operation handle 133 is not operated.

  A restriction projection 147h is located below the flange 169b3 at the front end of the release lever 131 as shown in FIG. In this state, when the gripping portion 168 of the operation handle 133 is pushed downward, the operation handle 133 elastically deforms the front elastic deformation portion 141, and the restricting projection 147h serves as a fulcrum in FIG. Rocks. At this time, the tip end portion 167a is displaced upward, and the flange 169b3 comes into contact with the second convex portion 147d from below. As a result, the movement of the operation portion of the operation handle 133 is restricted more than necessary. Here, the release lever 131 restricts the locking portion 147e from coming into contact with the flange portion 115c of the fixing member 115 and the recess 147a coming off from the protruding portion 119b of the lock member 117, and the upper lever 149 on the rear side. The provided protrusion 149a abuts against the upper ceiling wall 105a of the upper rail 105 from below to restrict the swinging.

  Next, the operation of the seat slide apparatus 101 configured as described above will be described.

  14 to 16 show a lock holding state in which the lock teeth 125 of the lock member 117 are locked by being engaged with the lock grooves 127 of the lower rail 103. When the occupant operates the operation handle 133 upward from this state, the operation handle 133 has a distal end portion 167a of the arm portion 167 supported by the operation handle receiving portion 137 of the lock member 117. It swings upward with 167a as a fulcrum. When the operation handle 133 is swung upward, the flange 169b3 of the operation unit 169 pushes the lower surface, which is the operating surface of the bent piece 147g, of the release lever 131 upward.

  As a result, the release lever 131 swings and rotates in the clockwise direction in FIG. 15 about the swing fulcrum 151. At this time, when the release lever 131 is swung, the curved convex portion 153a of the rear release pressing portion 153 pushes the rear end portion 123a corresponding to the periphery of the lock portion of the lock member 117 downward, and the rear elastic deformation portion 123 Elastically deforms downward. As a result, the lock teeth 125 are disengaged from the lock grooves 127 of the lower rail 103 and the lock is released. By releasing the lock, a seat (not shown) can be moved back and forth with the upper rail 105 with respect to the floor surface of the vehicle on the lower rail 103 side, and a seat position desired by the occupant can be secured.

  When the occupant releases his hand from the operation handle 133 with the seat position determined, the rear elastic deformation portion 123 of the lock member 117 presses the release pressing portion 153 upward, and the release lever 131 is swung to rotate as shown in FIG. Return to locked state. At this time, the release lever 131 swings and rotates counterclockwise in FIG. 15 about the swing fulcrum 151.

  In the state of FIG. 15, for example, it is assumed that the vehicle has collided from the rear and the passenger's heel collided with the operation handle 133 in the rearward direction. In this case, the load received by the operation handle 133 acts on the first convex portion 147c of the release lever 131 shown in FIGS. 15 and 16 via the rear end portion 169a of FIG. 25A. When the first convex portion 147c receives a load toward the rear, the front end claw portion 145 is detached from the concave portion 133a by an impact acting on the operation handle 133, and the operation handle 133 moves rearward. At this time, in the release lever 131, the recess 147 a in the swing fulcrum 151 is moved away from the protrusion 119 b of the lock member 117.

  Thereby, the impact when the passenger's heel collides with the operation handle 133 is alleviated. When the operation handle 133 moves rearward, the rear end upper surface 169a1 of the operation portion 169 abuts on the first front inclined portion 135 of the lock member 117 shown in FIG. 15, and further rearward movement is restricted. The The operation handle 133 moves the rear end of the rear end upper surface 169a1 rearward and upward along the front first inclined portion 135, so that the front end 167a (rear end of the rear end upper surface 169a1) moves upward. The tip 167a deviates from the position where the first protrusion 147c faces. For this reason, the operation handle 133 can move rearward larger than the release lever 131. Further, the release lever 131 does not move backward more than necessary.

  As shown in FIG. 24, the lock member 117 and the release lever 131 can be assembled to each other before they are assembled to the upper rail 105. Since the lower part of the release lever 131 is opened over the entire length in the longitudinal direction, the release lever 131 is inserted between the left and right side walls 147 in a state where the lock member 117 is inclined from the lower opening side. In a state where the fixing portion 119 including the protruding portion 119b is inserted until the fixing portion 119 is positioned above the side wall 147, the locking member 117 is returned to the horizontal position and then moved downward, whereby the protruding portion 119b of the locking member 117 is moved to the release lever 131. Enter the recess 147a.

  At this time, the curved convex portion 153 a of the release pressing portion 153 comes into contact with the rear end portion 123 a of the lock member 117, and the front projects forward from the release lever 131 from the vicinity of the center position in the front-rear direction of the front elastic deformation portion 141. As shown in FIGS. 14 to 16, the lock member 117 and the release lever 131 assembled in this way are inserted between the left and right upper side walls 105 b of the upper rail 105, and the fixing portion 115 of the lock member 117 is fixed by the fixing tool 115. Is fixed to the upper ceiling wall 105 a of the upper rail 105. Thus, since the lock member 117 and the release lever 131 can be assembled to the upper rail 105 in a state of being assembled with each other in advance, the assembly workability is improved.

  The operation handle 133 inserts the operation portion 169 from the front end opening of the release lever 131 while bending the front elastic deformation portion 141 of the lock member 117 downward with the lock member 117 and the release lever 131 assembled to the upper rail 105. .

  The operation handle 133 is inserted so as to move the accommodation recess 170 along the front elastic deformation portion 141. Here, the left and right widths of the front end claw portion 145 of the lock member 117 are larger than the left and right widths of the housing recess 170. For this reason, the front end claw portion 145 slides below the housing recess 170 without engaging the housing recess 170. As shown in FIGS. 15 and 24, the front end portion 167a extends from the second front inclined portion 139 to the operation handle receiving portion 137, and the front end claw portion 145 of the lock member 117 is inserted to a position corresponding to the concave portion 133a. The As a result, the front end claw portion 145 engages with the concave portion 133a to complete the assembly. Thus, the operation handle 133 only needs to be inserted into the release lever 131 in a state where the front elastic deformation portion 141 of the lock member 117 is bent downward, and the assembly workability of the operation handle 133 is improved.

  In the release lever 131, the left and right side walls 147 are disposed along the left and right upper side walls 105b of the upper rail 105, and the release pressing portion 153, the recess 147a (swinging fulcrum portion 151), and the operating portion 159 are arranged in the front-rear direction. Are arranged on a substantially straight line. For this reason, the height of the release lever 131 in the vertical direction can be reduced, and the release lever 131 can be efficiently arranged in a narrow space in the upper rail 105, and the overall size of the apparatus can be reduced.

  The lock member 117 according to this embodiment includes a swinging fulcrum part 151 and a fixed part 119 fixed to the upper rail 105, and a rear elastic member that is positioned rearward of the fixed part 119 and biases the lock teeth 125 in the lock direction. A deformable portion 123, a front elastic deformable portion 141 that is positioned forward of the fixed portion 119 and urges the release lever 131 and the operation handle 133 upward, and is set to have a smaller urging force than the rear elastic deformable portion 123; It has.

  Thus, in the present embodiment, the biasing means (rear elastic deformation portion 123) for biasing the lock member 117 in the lock direction and the biasing means (front elastic deformation portion 141) for biasing the operation handle 133 upward. Are integrated into a spring member. For this reason, compared with the case where these two urging means are provided separately, the number of parts can be reduced.

  In the release lever 131, the release pressing portion 153 on the rear side is urged upward by the rear elastic deformation portion 123 of the lock member 117. On the other hand, as shown in FIG. 24, the flange 169b3 of the operation handle 133 is in contact with the bent piece 147g of the release lever 131 from below. For this reason, in the release lever 131, the bent piece 147g is urged upward via the operation handle 133 (flange 169b3) in which the concave portion 133a is urged upward by the front elastic deformation portion 141.

  Thus, the lock member 117 is provided with the rear elastic deformation portion 123 having a function of urging upward and the front elastic deformation portion 141 having a function of urging upward with the front side. . At this time, the release lever 131 is swingably supported by the lock member 117 via the swing fulcrum 151 at the center in the front-rear direction. For this reason, the two parts of the lock member 117 and the release lever 131 can be unitized and attached to each other before being attached to the upper rail 105, and the assembling workability is improved.

  In the present embodiment, a fixture 115 that fixes the fixing portion 119 of the lock member 117 to the lower surface of the upper rail 105 is provided. As shown in FIG. 22B, the fixture 115 includes a flange portion 115 c that protrudes sideways on the opposite side of the upper rail 105 a of the upper rail 105 with the lock member 117 therebetween. Here, the side is the direction toward the side wall 147 of the release lever 131 in FIG. 22B. The release lever 131 includes a locking projection 147e located at the top of the flange portion 115c.

  In this case, when the operation handle 133 is operated upward and the release lever 131 is swung and rotated about the swing fulcrum 151 or when the operation handle 133 is pushed downward, the release lever 131 is released. The lever 131 may receive a force downward. However, at this time, the locking protrusion 147e of the release lever 131 comes into contact with the flange 115c of the fixture 115 from above. Accordingly, the downward movement of the release lever 131 in the vicinity of the swing fulcrum 151 is restricted, and the recess 147a of the release lever 131 can be prevented from being detached from the protruding portion 119b of the lock member 117.

  Further, a case where the lock teeth 125 of the lock member 117 do not enter the lock groove 127 of the lower rail 103 and ride on the lower surfaces between the adjacent lock grooves 127 is conceivable. In this case, the release lever 131 does not receive upward biasing force by the rear elastic deformation portion 123 of the lock member 117. However, at this time, the release lever 131 is prevented from moving downward by the locking projection 147e coming into contact with the flange 115c from above.

  That is, the flange 115c of the fixture 115 has a holding function of holding the release lever 131 so as to restrict the downward movement of the release lever 131. For such a holding function, it is only necessary to provide the fixing member 115 with the flange portion 115c and the release lever 131 with the locking projection 147e, and it is not necessary to provide a separate holding function component. For this reason, the increase in the number of parts can be suppressed.

  When the lock member 117 is fixed to the upper rail 105 by the fixing tool 115, the fixing tool 115 is inserted from below in FIG. At this time, the release lever 131 is temporarily supported near the recess 147a by the flange 115c of the fixture 115 via the locking projection 147e, so that the assembly workability is improved.

  In the present embodiment, the locking projection 147 e is formed by cutting and raising the side wall 147 which is a part of the release lever 131. For this reason, the latching protrusion 147e can be formed easily.

  When the operation handle 133 is operated upward, the tip end portion 167a of the arm portion 167 swings so as to push the operation handle receiving portion 137 of the lock member 117 downward. For this reason, the lock member 117 is provided with a handle support portion (operation handle receiving portion 137) at the time of the swing operation of the operation handle 133, and there is no need to separately provide a handle support portion on the upper rail, and the number of parts can be reduced. A reduction in the height of the upper rail can be achieved.

  In the lock member 117 of the present embodiment, a fixing portion 119, an operation handle receiving portion 137 as a handle support portion, and a front elastic deformation portion 141 are connected in a step shape in a side view and extend in the front-rear direction. . In the state where the fixed portion 119, the operation handle receiving portion 137, and the front elastic deformation portion 141 are substantially parallel to each other as shown in FIG. 15, the front elastic deformation portion 141 and the rear elastic deformation portion 123 are elastically deformed. The front end claw portion 145 and the rear end portion 123a are biased upward. Further, the operation portion 169 as a rear connection portion of the operation handle 133 is formed in a substantially U-shaped cross section, and the operation handle receiving portion 137 of the lock member 117 is formed in the housing concave portion 170 having the inverted U-shaped cross section of the operation portion 169. Is housed from below.

  For this reason, the lock member 117 may be formed by bending a flat plate spring member, the structure can be simplified, and manufacture is easy. Further, the operation handle receiving portion 137 of the lock member 117 is accommodated in the accommodation concave portion 170 having an inverted U-shaped cross section of the operation portion 169 of the operation handle 133. For this reason, the handle support part (the rotation center of the handle) of the operation handle 133 can be easily set in front of the swinging fulcrum part 151 of the release lever 131. By housing the operation handle receiving portion 137 in the housing recess 170, the height in the vertical direction around the overlapping portion of the operation handle 133 and the operation handle receiving portion 137 of the lock member 117 can be suppressed low.

  In the present embodiment, the front end of the front elastic deformation portion 141 of the lock member 117 is provided with a front end claw portion 145 that protrudes upward at a position in front of the operation portion 159 of the release lever 131, and the lower portion of the operation handle 133. In addition, a recess 133a is formed in which the front end claw portion 145 of the front elastic deformation portion 141 is fitted.

  As described above, the front end claw portion 145 of the front elastic deformation portion 141 is fitted in the concave portion 133a of the operation handle 133 at a position in front of the operation portion 159 of the release lever 131, so that the axial direction ( The movement in the front-rear direction can be restricted. As a result, the axial force of the operation handle 133 can be prevented from acting directly on the release lever 131, and the axial movement of the release lever 131 can be restricted. Further, the operation handle 133 receives an upward biasing force by the front elastic deformation portion 141, whereby the distal end of the operation portion 169 is biased downward with the bent piece 147g of the release lever 131 as a fulcrum. At this time, the bending lever 147g of the release lever 131 is urged upward by the flange 169b3 of the operation handle 33. Therefore, the release lever 131 is held in a state where the recess 147a and the protrusion 119b in the swing fulcrum 151 are engaged, and the tip of the operation portion 169 of the operation handle 133 is pressed against the operation handle receiving portion 137. Maintained.

  Further, the front elastic deformation portion 141 of the lock member 117 extends in parallel with the housing recess 170 of the operation handle 133, and when the operation handle 133 is operated upward, the front is biasing the operation handle 133 upward. The elastic deformation part 141 moves together with the operation handle 133. For this reason, since the front end nail | claw part 145 and the front elastic deformation part 141 are in the position which overlaps with the operation handle 133, and do not protrude outside, safety is high.

  In the present embodiment, the front end claw portion 145 of the front elastic deformation portion 41 of the lock member 17 is located in front of the front end of the upper rail 105. For this reason, when the operation handle 133 is assembled, the front elastic deformation portion 141 protruding forward can be easily lowered, and the operation handle 133 can be easily inserted into the release lever 131 in this state.

  In the present embodiment, when the operation handle 133 receives a load in the downward direction, the operation handle 133 deflects the front elastic deformation portion 141 while using the restricting protrusion 147h as a fulcrum in the counterclockwise direction in FIG. Rocks. At this time, the rear end upper surface 169a1 of the operation portion 169 (the distal end portion 167a of the arm portion 167) moves upward away from the operation handle receiving portion 137 of the lock member 117, and the distal end of the rear end portion 169a is the first convex. The position is shifted in the vertical direction with respect to the portion 147c.

  Thereby, when the operation handle 133 is pushed downward, even if a load is applied to the operation handle 133 backward, the load can be prevented from acting on the release lever 131, and the release lever 131 can be moved rearward. Can be suppressed. Further, when the rear end upper surface 169a1 of the operation portion 169 (the tip portion 167a of the arm portion 167) moves upward away from the operation handle receiving portion 137 of the lock member 117, the flange 169b3 becomes the second convex portion 147d. By abutting from below, the operation handle 133 can be prevented from swinging more than necessary. Such an unnecessary swing suppression effect of the operation handle 133 is effective in a state where the upper rail 105 protrudes forward with respect to the lower rail 103.

  The swing fulcrum 151 of the present embodiment can be set within the thickness of the lock member 117 formed of a leaf spring, and the swing fulcrum structure can be made more compact.

  When the release lever 131 receives an impact and moves backward, the recess 147a is disengaged from the protruding portion 119b. At this time, since the release lever 131 moves downward by the gap T and the recess 147a and the protrusion 119b are only slightly plastically deformed, the force for rotating the release lever 131 in the unlocking direction is extremely small. . For this reason, when the recess 147a is disengaged from the protruding portion 119b, the release lever 131 can be suppressed from pushing the lock member 117 downward, and the unlocking can be more reliably suppressed.

  The load setting when the recess 147a is disengaged from the protruding portion 119b can be easily performed by changing the shape of the recess 147a or the protruding portion 119b. For example, the lower portion of the protruding portion 119b may have a curved shape that protrudes downward in accordance with the curved shape of the recess 147a. The recess 147a may have a flat shape at the bottom and a shape in which inclined surfaces are provided before and after the bottom of the flat shape.

  When the recess 147a is disengaged from the protrusion 119b, the release lever 131 moves downward, and the locking protrusion 147e contacts the flange 115c of the fixture 115. However, the load that the release lever 131 receives at this time is extremely large. For this reason, for example, when the locking projection 147e is deformed, the recess 147a is detached from the projection 119b.

  The seat slide device 1 according to the second embodiment of the present invention shown in FIGS. 1 to 4 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 of the vehicle, and is installed on the lower rail 3 extending along the vehicle front-rear direction, and on the back surface of the seat seat (not shown), and along the longitudinal direction of the lower rail 3. And an upper rail 5 which is assembled so as to be relatively movable in the lower rail 3. The rail body 6 is comprised by the lower rail 3 and the upper rail 5, and the rail body 6 is provided in the left-right pair. 2 and 3, the lower rail 3 is omitted. In the following description, “front” is the left front side of the vehicle in FIGS. 2 and 3, and “rear” is the right rear side of the vehicle in FIGS.

  As shown in FIG. 4, the lower rail 3 includes a lower bottom wall 3 a having a rectangular plate shape extending in the vehicle front-rear direction. From both end edges of the lower bottom wall 3a in the vehicle width direction, a pair of left and right lower outer walls 3b rise from the lower bottom wall 3a so as to be inclined slightly outward. A lower inclined wall 3c extending obliquely upward so as to approach each other from upper end edges of the pair of left and right lower outer walls 3b is provided, and parallel to the lower bottom wall 3a in a direction approaching each other from the upper end of the lower inclined wall 3c. A pair of left and right lower upper walls 3d are provided.

  A pair of left and right lower inner walls 3e is provided to hang downward from the inner edge of the pair of left and right lower upper walls 3d toward the lower bottom wall 3a. In addition, the space | interval between the lower inner side walls 3e which oppose in a mutually parallel state is set so that the upper rail 5 accommodated in the lower rail 3 can move.

  The upper rail 5 includes an upper top wall 5a having a rectangular plate shape extending in the longitudinal direction of the vehicle body. A pair of left and right upper side walls 5b hang downward from both ends of the upper ceiling wall 5a in the vehicle width direction. Upper lower inclined walls 5c rise obliquely upward and outward from the lower end edges of both upper side walls 5b. From the upper end edge of the pair of left and right upper lower inclined walls 5c, the upper upper inclined wall 5e rises obliquely upward toward the lower inclined wall 3c via the bent portion 5d.

  A lower guide ball 7 is rotatably arranged between a lower arc portion 3 f between the lower bottom wall 3 a and the lower outer wall 3 b of the lower rail 3 and an upper lower inclined wall 5 c of the upper rail 5. An upper guide ball 9 is arranged between the upper arcuate portion 3g between the lower outer wall 3b of the lower rail 3 and the lower inclined wall 3c and the upper upper inclined wall 5e of the upper rail 5 so as to be able to roll.

  As shown in FIG. 5, the lower guide ball 7 and the upper guide ball 9 are rotatably supported by a ball retainer 11 that is omitted in FIG. 4. The ball retainer 11 supports a total of four lower guide balls 7 and two upper guide balls 9. The ball retainer 11 in a state of supporting the lower guide ball 7 and the upper guide ball 9 is a housing portion 13 (FIG. 4) surrounded by the lower outer wall 3b, the lower inclined wall 3c, the lower upper wall 3d, and the lower inner wall 3e. Inside, two places are arranged in the front and rear, and a total of four places are arranged with respect to the pair of left and right rail bodies 6. 1 to 3, the lower guide ball 7, the upper guide ball 9, and the ball retainer 11 are omitted.

  As shown in FIGS. 2 and 3, a lock member 17 is fixed to the upper top wall 5 a on the front side of the upper rail 5 by a fixing tool 15 such as a rivet. The lock member 17 is configured by a plate-like spring member. The lock member 17 includes a fixing hole 19 a into which the fixing tool 15 is inserted in the fixing portion 19 fixed by the fixing tool 15. Here, a pair of slits are formed in the upper ceiling wall 5a of the upper rail 5 along the connecting portion between the upper ceiling wall 5a and the upper sidewall 5b so as to sandwich the fixing hole 5f. A peripheral portion of the fixing hole 5f is formed to be depressed downward with respect to the other upper ceiling wall 5a. Thereby, the head of the fixture 15 is set so as not to protrude from the other upper surface of the upper top wall 5 a of the upper rail 5.

  The fixed portion 19 extends in the front-rear direction substantially parallel to the upper ceiling wall 5a, and a rearward inclined portion 21 that is inclined rearward and downward from the rear end of the fixed portion 19 is formed. A rear elastic deformation portion 23 extending from the rear end of the rear inclined portion 21 toward the rear substantially parallel to the fixed portion 19 is formed. As shown in FIG. 3 and FIG. 7, the rear end portion 23a of the rear elastically deforming portion 23 has a total of six lock teeth 25 as lock portions protruding in the left and right sides, approximately three at regular intervals in the front-rear direction. One is provided.

  As shown in FIG. 6, in the vicinity of the center of the upper rail 5 in the front-rear direction, three lock tooth fitting holes 29 are formed on the left and right sides along the front-rear direction from the left and right upper side walls 5 b to the upper lower inclined walls 5 c. doing. As shown in FIGS. 2 and 3, the lock teeth 25 of the lock member 17 enter the lock tooth fitting holes 29 from below.

  On the other hand, as shown in FIG. 5, a plurality of lock grooves 27 serving as locked portions are provided along the front-rear direction at positions other than the vicinity of the front and rear portions of the left and right lower inner walls 3 e of the lower rail 3. When the lock teeth 25 of the lock member 17 enter the lock grooves 27 from below while being positioned in the lock tooth fitting holes 29, the lock member 17 is locked with respect to the lower rail 3. Thereby, the movement of the upper rail 5 to which the lock member 17 is attached in the front-rear direction with respect to the lower rail 3 is restricted.

  With the lock member 17 attached to the upper rail 5, the state where the lock teeth 25 enter the lock groove 27 is maintained by the rear elastic deformation portion 23 applying an elastic force upward. From this state, by operating the operation handle 33 upward, the rear end portion 23a of the lock member 17 is pushed downward via the release lever 31, and the lock is released. The operation handle 33 is inserted into the upper rail 5 from the front and is disposed so as to be interlocked with the release lever 31.

  As shown in FIGS. 3 and 7, the lock member 17 includes projecting portions 19 b as supported portions projecting sideways from the left and right side portions at positions corresponding to the fixing holes 19 a of the fixing portion 19. ing. The protruding portion 19b protrudes laterally with the same thickness as the thickness of the lock member 17 including the fixing portion 19, and has a rectangular shape in plan view. As shown in FIG. 2, the lock member 17 has a front first inclined portion 35 formed on the front side opposite to the rear inclined portion 21 with the fixing portion 19 as a boundary. The front first inclined portion 35 is inclined so as to be lower toward the front.

  An operation handle receiving portion 37 extending substantially parallel to the fixing portion 19 is formed forward from the front end (lower end) of the front first inclined portion 35, and the second front inclined portion extending obliquely forward from the front end of the operation handle receiving portion 37. 39 is formed. The upper end portion 67a of the arm portion 67 (to be described later) of the operation handle 33 is brought into contact with the upper surface of the operation handle receiving portion 37. A front elastic deformation portion 41 extending from the front end of the front second inclined portion 39 toward the front and substantially parallel to the operation handle receiving portion 37 is formed.

  At the front end of the front elastically deforming portion 41, there is provided a gently inclined portion 43 that is bent and extended slightly upward and forward, and at the front end portion of the gently inclined portion 43, a front end claw portion d45 that protrudes toward the left and right sides is formed. Has been. The front end claw portion 45 is engaged with a concave step portion 33a formed on the lower surface of the operation handle 33 from below. The front elastic deformation portion 41 presses the stepped portion 33a upward via the front end claw portion 45. The pressing force against the step portion 33 a of the front elastic deformation portion 41 is set to be weaker than the pressing force to the lock groove 27 by the lock teeth 25 of the rear elastic deformation portion 23. Thereby, the state where the lower end of the operation handle 33 is in contact with the operation handle receiving portion 37 of the lock member 17 is ensured.

  As shown in FIG. 2, when the lock member 17 is attached to the upper rail 5, the front side of the front elastically deforming portion 41 from the center in the front-rear direction protrudes forward from the upper rail 5.

  As shown in FIG. 8, the release lever 31 includes left and right side walls 47 and an upper wall 49 that connects the upper ends of the left and right side walls 47 in a substantially half region on the rear side of the left and right side walls 47. The lock member 17 is disposed between the left and right side walls 47 of the release lever 31 except for the vicinity of the front portion and the vicinity of the rear portion. That is, the release lever 31 is provided at a position where the lock member 17 and the upper rail 5 overlap in the longitudinal direction and the vertical direction.

  A recess 47 a as a support portion is formed at the upper end portion of the side wall 47 on the front side of the upper wall 49 of the release lever 31. The recess 47a has an arcuate concave curved surface. As shown in FIG. 10, the recess 47a is disposed below the left and right protrusions 19b of the lock member 17, and the lower part of the protrusion 19b is engaged with the recess 47a. The protrusion 19b of the lock member 17 and the recess 47a of the release lever 31 constitute a swing fulcrum 51 when the front and rear of the release lever 31 swings up and down. The swing fulcrum portion 51 coincides with the fixing portion of the lock member 17 to the upper rail 5 by the fixture 15 in the front-rear direction.

  The release lever 31 includes a release pressing portion 53 at the end rearward of the swing fulcrum portion 51. In the release pressing portion 53, the lower end 47 b of the side wall 47 extending downward from the left and right ends of the upper wall 49 is in contact with the upper surface of the rear end portion 23 a of the rear elastic deformation portion 23 in the lock member 17.

  The front end portions of the left and right side walls 47 of the release lever 31 are provided with front side walls 55 bent so as to approach each other, and the upper ends of the left and right front side walls 55 are connected to each other by a front upper wall 57. The front side wall 55 constitutes an action part (actuating part 59) to which a force when the operation handle 33 is rotated in the upward unlocking direction is applied from below. That is, the release lever 31 has an action portion (actuating portion 59) to which a force is applied when the operation handle 33 is operated, on the front side opposite to the release release pressing portion 53 with the swing fulcrum portion 51 as a boundary. I have. The front side wall 55, a locking projection 61, which will be described later, and a first convex portion 47c as a pushing portion constitute an operating portion 59. The operating portion 59 of the release lever 31 is located in front of the swinging fulcrum portion 51 and opposite to the rear release pressing portion 53.

  As shown in FIGS. 8 and 9, locking protrusions 61 are provided at the front ends (near the action portion) of the left and right front side walls 55. The locking projection 61 constitutes a bent portion that is bent at a substantially right angle from the front end of the front side wall 55 toward both the upper side walls 5 b, and protrudes outward from the front side wall 55 in the width direction. A drooping portion 63 that extends downward from the locking projection 61 is formed at a position inside the tip of the locking projection 61, and a bent portion 65 that extends inward from the lower end of the hanging portion 63 is formed. The locking projection 61, the hanging portion 63, and the bent portion 65 are formed in the same plane in the direction orthogonal to the front-rear direction, and the entirety is a bent flange 66.

  Inside the bent flange 66 is an opening 80 into which the operation handle 33 is inserted from the front. For this reason, the bent flange 66 forms the periphery of the opening that forms the periphery of the opening 80. The left and right bent portions 65 constitute a lower surface portion that abuts from above when the operation handle 33 is pushed downward, and a slit 81 is formed between the left and right bent portions 65.

  The front elastic deformation portion 41 is positioned between the left and right hanging parts 63 shown in FIG. 9 in a free state of the lock member 17 (a state in which the operation handle is not assembled). At this time, the distance H between the ends of the left and right bent portions 65 is formed wider than the width of the front elastic deformation portion 41 in the left-right direction (the left-right direction in FIG. 9 and the direction perpendicular to the paper in FIG. 2). is there. Thereby, the front elastic deformation part 41 can enter the position between the hanging parts 63 through the slit 81 between the left and right bent parts 65 from below.

  The operation handle 33 has a substantially U shape having a pair of left and right arm portions 67 corresponding to the pair of left and right rail bodies 6 shown in FIG. The pair of left and right arm portions 67 extends in the front-rear direction and is inserted into the left and right upper rails 5 from the front end. The left and right arm portions 67 are connected and integrated by a grip portion (not shown) extending in the vehicle width direction. The gripping part grips the operation handle 33 when the occupant operates it.

  2 and 10, the arm portion 67 has a rear end portion inserted between the left and right side walls 47 of the release lever 31, and as described above, the rear end portion 67a is shown in FIG. In this manner, the operation handle receiving portion 37 of the lock member 17 is in contact with the upper surface. The arm portion 67 is entirely composed of a cylindrical member including the grip portion (not shown) described above, and the rear portion from the vicinity of the step portion 33a is crushed from above and below as shown in FIG. A hat-shaped operation unit 69 is provided.

  The operation unit 69 includes an upper surface 69a, a side surface 69b extending downward from the left and right ends of the upper surface 69a, and a flange 69c extending substantially parallel to the upper surface 69a from the lower end of the left and right side surfaces 69b toward the left and right sides. The lower part of the shape is open. The hat-shaped lower portion serves as a housing recess 70 that houses the front elastic deformation portion 41 of the lock member 17. The flange 69 c is substantially in contact with the lower end 55 a of the front side wall 55 of the release lever 31. In this state, a force when the operation handle 33 is operated upward is applied to the lower end 55a of the front side wall 55 from below through the flange 69c.

  As shown in FIG. 3, the release lever 31 is provided with a first convex portion 47 c at a position facing the rear of the tip of each flange 69 c of the operation portion 69. The first convex portion 47c protrudes inward from the side wall 47 of the release lever 31, and is slightly attached to the flange 69c in the assembled state of the operation handle 33 in which the front end claw portion 45 is engaged with the step portion 33a. It is separated. A second convex portion 47 d that protrudes inward from the side wall 47 is provided on the side wall 47 that is in front of and above the first convex portion 47 c. The second convex portion 47d is provided at a position above the flange 69c and away from the flange 69c in a holding state when the operation handle 33 is not operated.

  A bent portion 65 of the bent flange 66 is positioned below the flange 69c at the front end of the release lever 31, as shown in FIG. In this state, when the gripping portion of the operating handle 33 is pushed downward, the operating handle 33 elastically deforms the front elastic deforming portion 41, and in the counterclockwise direction in FIG. Swing. At this time, the tip 67a is displaced upward from the solid line position to the two-dot chain line position as shown in FIG. 12, and the flange 69c abuts against the second convex part 47d from below. Thereby, the operation part of the operation handle 33 is restricted from moving downward more than necessary. Here, the front portion of the release lever 31 does not move downward because the locking protrusion 61 is engaged with a locking protrusion accommodating portion 71 (FIG. 13) described later of the upper side plate 5b of the upper rail 5. .

  At the front end of the upper rail 5, a locking projection accommodating portion 71 that accommodates the locking projection 61 of the release lever 31 is provided. The locking projection accommodating portion 71 is configured by a recessed portion 73 that is recessed in a substantially L shape toward the rear at each front end of the pair of left and right upper side walls 5 b of the upper rail 5. The recessed part 73 is provided with the bottom part 73a located in a rear end, as expanded and shown in FIG. A lower side portion 73b extends forward from the lower end of the bottom portion 73a, and the front end of the lower side portion 73b reaches the front end of the upper rail 5.

  The upper first side 73c extends forward from the upper end of the bottom 73a, and the upper first side 73c is shorter in the front-rear direction than the lower side 73b. That is, the front end of the upper first side portion 73 c does not reach the front end of the upper rail 5. A front bottom portion 73d extending upward from the front end of the upper first side portion 73c is formed, and an upper second side portion 73e extending forward is formed from the upper end of the front bottom portion 73d.

  In the state where the release lever 31 is assembled to the upper rail 5 as shown in FIGS. 2 and 3, the locking projection 61 is positioned between the lower side portion 73b and the upper second side portion 73e, and on the lower side portion 73b side. positioned. The space between the lower side portion 73b and the upper second side portion 73e is located on the front side in the recess 73, and the vertical movement of the locking projection 61 when the release lever 31 is swung up and down. A front recess 73f (downward movement restricting portion) to be allowed is configured. Here, the lower side portion 73b of the recess 73 restricts the front portion of the release lever 31 from moving downward.

  The space behind the front recess 73f in the recess 73, that is, the space between the lower side portion 73b and the upper first side portion 73c is the unlocking direction of the release lever 31 with the release lever 31 moved rearward. The rear recessed part 73r (lock release control part) which controls the movement to is comprised.

  In the non-operating holding state shown in FIG. 2, the lower end of the locking projection 61 of the release lever 31 is located on the lower side portion 73 b side of the recess 73 of the upper rail 5. Accordingly, in this state, the release lever 31 maintains a state in which the protruding portion 19b constituting the swing fulcrum 51 and the recess 47a are substantially in contact with each other, and the front side wall 55 (actuating portion 59) of the release lever 31 is maintained. The downward movement is restricted.

  Next, the operation of the seat slide device 1 configured as described above will be described.

  1 to 3 show a lock holding state in which the lock teeth 25 of the lock member 17 are locked by being engaged with the lock grooves 27 of the lower rail 3. In this state, when the occupant operates the operation handle 33 upward, the lower surface of the distal end portion 67 a of the arm portion 67 is supported by the operation handle receiving portion 37 of the lock member 17. It swings upward with 67a as a fulcrum. When the operation handle 33 is swung upward, the flange 69c of the operation portion 69 presses the lower end 55a serving as the operation surface of the front side wall 55 of the release lever 31 upward.

  Thereby, the release lever 31 swings and rotates in the clockwise direction in FIG. 2 around the swing fulcrum 51. At this time, the release lever 31 moves upward in the front recess 73f shown in FIG. 13 toward the upper second side portion 73e. In the release lever 31, the lower end 47b of the rear release pressing portion 53 presses the rear end portion 23a corresponding to the periphery of the lock portion of the lock member 17 downward by swinging rotation, and the rear elastic deformation portion 23 is elasticated downward. Deform. As a result, the lock teeth 25 are released from the lock grooves 27 of the lower rail 3 and the lock is released. By releasing the lock, a seat (not shown) can be moved back and forth with the upper rail 5 with respect to the floor surface of the vehicle on the lower rail 3 side, and a seat position desired by the occupant can be secured.

  When the occupant releases his hand from the operation handle 33 with the seat position determined, the rear elastic deformation portion 23 of the lock member 17 presses the lower end 47b of the release pressing portion 53 upward, and the release lever 31 is swung and rotated. Returning to the lock holding state of FIG. At this time, the release lever 31 swings and rotates in the counterclockwise direction in FIG. 2 around the swing fulcrum 51, and the locking projection 61 moves from the front recess 73f shown in FIG. 13 to the lower side 73b. Move downwards.

  In the state of FIG. 2, for example, it is assumed that the vehicle has collided from behind, and the passenger's heel collided with the operation handle 33 in the backward direction. In this case, the front end claw portion 45 is detached from the stepped portion 33a by an impact acting on the operation handle 33, and the operation handle 33 moves rearward. At this time, the load received by the operation handle 33 acts on the first convex portion 47c of the release lever 31 shown in FIGS. 2 and 3 via the rear end of the flange 69c of FIG. When the first convex portion 47 c receives a load toward the rear, the recess 47 a in the swing fulcrum portion 51 moves away from the protruding portion 19 b of the lock member 17 and moves rearward. Thereby, the impact when the passenger's heel collides with the operation handle 33 is alleviated. When the operation handle 33 moves rearward, the rear end of the upper surface 69a of the operation portion 69 shown in FIG. 11 abuts on the first first inclined portion 35 of the lock member 17 shown in FIG. Be regulated. Note that the distal end portion 67 a of the operation handle 33 can be moved rearward and larger than the release lever 31 by moving rearward and upward along the front first inclined portion 35. Further, since the flange 69c is disengaged from the position opposite to the first convex portion 47c by moving the tip end portion 67a upward, the release lever 31 does not move backward more than necessary.

  When the release lever 31 moves rearward, the locking projection 61 shown in FIG. 13 moves in the recess 73 from the front recess 73f toward the rear recess 73r. Since the locking projection 61 is positioned in the rear recess 73r, the vertical movement is restricted between the upper first side portion 73c and the lower side portion 73b. In other words, the vertical interval between the rear recesses 73r is set to be slightly larger than the height dimension in the vertical direction of the locking projection 61. In this case, when the release lever 31 moves rearward, at least a gap may be formed between the upper end of the locking projection 61 and the lower end of the upper first side portion 73c.

  In this way, the release lever 31 is restricted from swinging up and down at the retracted position moved rearward. For this reason, even when the operation handle 33 moves in the unlocking direction, the release lever does not rotate in the unlocking direction, and the rear release pressing portion 53 is the rear end portion of the rear elastic deformation portion 23 of the lock member 17. There is no fear of pressing 23a downward, and it is possible to suppress the unlocking. Therefore, even if the occupant's heel collides with the operation handle 33 in the rearward direction, a load in the unlocking direction does not act on the release lever 31 and the lock member 17, so that an inadvertent movement of the seat on which the occupant is seated is performed. Can be suppressed.

  In the retracted position where the release lever 31 has moved backward, even if a load is applied upward from the swing fulcrum 51 of the release lever 31, the locking projection 61 of the release lever 31 remains within the rear recess 73 r. Abutting on the upper first side portion 73c, the upward movement is restricted. Therefore, the upper first side portion 73c constitutes a lock release restricting portion that restricts movement of the release lever 31 in the unlocking direction in a state where the release lever 31 has moved rearward.

  As shown in FIG. 10, the lock member 17 and the release lever 31 can be assembled to each other before they are assembled to the upper rail 5. Since the lower part of the release lever 31 is opened over the entire length in the longitudinal direction, the release lever 31 is inserted between the left and right side walls 47 in a state where the lock member 17 is inclined from the lower opening side. In a state where the fixing portion 19 including the protruding portion 19b is inserted until the fixing portion 19 is located above the side wall 47, the locking member 17 is returned to the horizontal position and then moved downward, whereby the protruding portion 19b of the locking member 17 is moved to the release lever 31. Enter the recess 47a.

  At this time, the lower end 47 b of the release lever 31 abuts on the rear end portion 23 a of the lock member 17, and the front protrudes forward from the release lever 31 from the vicinity of the center position in the front-rear direction of the front elastic deformation portion 41. As shown in FIGS. 1 to 3, the lock member 17 and the release lever 31 assembled in this way are inserted between the left and right upper side walls 5 b of the upper rail 5, and the fixing portion 15 of the lock member 17 is fixed by the fixing tool 15. Is fixed to the upper top wall 5 a of the upper rail 5. As described above, the lock member 17 and the release lever 31 can be assembled to the upper rail 5 only by the fixture 15 in a state of being assembled in advance, so that the assembly workability is improved.

  In the state where the lock member 17 and the release lever 31 are assembled to the upper rail 5, the operation handle 33 bends the front elastic deformation portion 41 of the lock member 17 downward and opens the operation portion 69 to the front end opening of the release lever 31 (FIG. 9). From the opening 80). The front elastic deformation part 41 moves the slit 81 between the left and right bent parts 65 shown in FIG.

  The operation handle 33 is inserted into the release lever 131 so that the accommodation recess 70 moves along the front elastic deformation portion 41. As a result, as shown in FIGS. 2 and 10, the distal end portion 67a reaches the operation handle receiving portion 37 from the second front inclined portion 39, and the front end claw portion 45 of the lock member 17 reaches a position corresponding to the step portion 33a. Inserted. As a result, the front end claw portion 45 engages with the step portion 33a to complete the assembly. Thus, the operation handle 33 only needs to be inserted into the release lever 31 in a state where the front elastic deformation portion 41 of the lock member 17 is bent downward, and the assembling workability of the operation handle 33 is also improved.

  The release lever 31 has left and right side walls 47 arranged along the left and right upper side walls 5b of the upper rail 5, and the release pressing portion 53, the recess 47a (the swinging fulcrum portion 51), and the operating portion 59 are arranged in the front-rear direction. Are arranged on a substantially straight line. For this reason, the height of the release lever 31 in the vertical direction can be reduced, and the release lever 31 can be efficiently disposed in a narrow space in the upper rail 5, and the entire apparatus can be reduced in size.

  The lock member 17 of the present embodiment includes a swinging fulcrum 51 and a fixed portion 19 as a base fixed to the upper rail 5, and is positioned rearward of the fixed portion 19 and biases the lock teeth 25 in the locking direction. A rear elastic deformation portion 23 as a rear biasing portion, and a release lever 31 and an operation handle 33 which are positioned forward of the fixing portion 19 and bias upward, and the biasing force is set to be weaker than that of the rear elastic deformation portion 23. A forward elastic deformation portion 41 as a forward urging portion.

  Thus, in the present embodiment, the urging means (rear elastic deformation portion 23) for urging the lock member 17 in the lock direction and the urging means (front elastic deformation portion 41) for urging the operation handle 33 upward. Are integrated into a spring member. For this reason, compared with the case where these two urging means are provided separately, the number of parts can be reduced.

  In the release lever 31, the release pressing portion 53 on the rear side is urged upward by the rear elastic deformation portion 23 of the lock member 17. On the other hand, as shown in FIG. 10, the flange 69 c of the operation handle 33 is in contact with the lower end 55 a of the front side wall 55 of the release lever 31 from below. For this reason, the front side wall 55 of the release lever 31 is urged upward via the operation handle 33 (flange 69c) in which the stepped portion 33a is urged upward by the front elastic deformation portion 41.

  As described above, the lock member 17 is provided with the rear elastic deformation portion 23 having a function of urging upward and the front elastic deformation portion 41 having a function of urging upward with the front side. . At this time, the release lever 31 is swingably supported by the lock member 17 via the swing fulcrum 51 at the substantially center in the front-rear direction. For this reason, the two parts of the lock member 17 and the release lever 31 can be unitized and attached to each other before being attached to the upper rail 5, so that the assembling workability is improved.

  When the operation handle 33 is operated upward, the distal end portion 67a of the arm portion 67 swings so as to push the operation handle receiving portion 37 of the lock member 17 downward. For this reason, the lock member 17 is provided with a handle support portion (operation handle receiving portion 37) at the time of swing operation of the operation handle 33, and it is not necessary to separately provide a handle support portion on the upper rail, and the number of parts can be reduced. A reduction in the height of the upper rail can be achieved.

  In the lock member 17 of the present embodiment, the fixed portion 19, the operation handle receiving portion 37 as a handle support portion, and the front elastic deformation portion 41 are connected in a step shape in a side view and are substantially parallel to each other. It extends in the front-rear direction. Further, the operation portion 69 as a rear connection portion of the operation handle 33 is formed in a substantially U-shaped cross section, and the operation handle receiving portion 37 of the lock member 17 is accommodated in the housing concave portion 70 having a reverse U-shaped cross section of the operation portion 69. Is housed from below.

  For this reason, the lock member 17 may be formed by bending a flat plate spring member, the structure can be simplified, and manufacture is easy. Further, since the operation handle receiving portion 37 of the lock member 17 is accommodated in the housing recess 70 having an inverted U-shaped cross section of the operation portion 69 of the operation handle 33, the operation handle receiving portion of the operation handle 33 and the lock member 17 is accommodated. The height in the vertical direction around the overlapping portion with 37 can be kept low.

  In the present embodiment, the front end of the front elastic deformation portion 41 of the lock member 17 is provided with a front end claw portion 45 as a fitting projection protruding in the left and right direction at a position in front of the operation portion 59 of the release lever 31. A step portion 33 a is formed at the lower portion of the operation handle 33 as a fitting recess into which the front end claw portion 45 of the front elastic deformation portion 41 is fitted. The front elastic deformation portion 41 of the lock member 17 is housed in a housing recess 70 that extends in the front-rear direction of the operation handle 33.

  As described above, the front end claw portion 45 of the front elastic deformation portion 41 is fitted to the step portion 33a of the operation handle 33 at a position in front of the operation portion 59 of the release lever 31, so that the axial direction of the operation handle 33 is increased. Movement in the (front-rear direction) can be restricted. Thereby, the axial force of the operation handle 33 can be suppressed from acting directly on the release lever 31, and the axial movement of the release lever 31 can be restricted. Further, the operation handle 33 receives an upward biasing force by the front elastic deformation portion 41, whereby the tip of the operation portion 69 is biased downward with the front side wall 55 of the release lever 31 as a fulcrum. At this time, the front side wall 55 of the release lever 31 is urged upward by the flange 69 c of the operation handle 33. For this reason, the release lever 31 is held in a state where the recess 47a and the protrusion 19b in the swing fulcrum 51 are engaged, and the tip of the operation portion 69 of the operation handle 33 is pressed against the operation handle receiving portion 37. Maintained.

  Further, the front elastic deformation portion 41 of the lock member 17 is housed in the housing recess 70 of the operation handle 33, and when the operation handle 33 is operated upward, the front elastic deformation portion that biases the operation handle 33 upward. 41 moves together with the operation handle 33. For this reason, the height dimension of the up-down direction in the position where the operation handle 33 and the front elastic deformation part 41 overlap in the front-back direction can be restrained small.

  In the present embodiment, the fitting protrusion of the front elastic deformation portion 41 of the lock member 17 is located in front of the front end of the upper rail 5. For this reason, when the operation handle 33 is assembled, the front elastic deformation part 41 protruding forward can be easily lowered downward, and the operation handle 33 can be easily inserted into the release lever 31 in this state. Further, the distance H between the ends of the front end claw portions 45 on both the left and right sides is smaller than the width in the left-right direction of the operation portion 69 of the operation handle 33. For this reason, after the operation handle 33 is assembled, the front end claw portion 45 is hidden by the operation handle 33 from the upper side and becomes difficult to see, and the appearance is improved. Further, it is possible to prevent an object from inadvertently hitting the front end claw portion 45 and coming off from the stepped portion 33a.

  In the present embodiment, the operating portion 59 of the release lever 31 is located in a front recess 73f (downward movement restricting portion) provided in the upper rail 5, and allows the operating portion 59 to rotate in the unlocking direction and A locking protrusion 61 is provided that engages with the side portion 73b and restricts the downward movement of the release lever 31. As a result, even when the operation handle 33 is pushed downward, the locking protrusion 61 of the operating portion 59 of the release lever 31 is restricted from moving downward, and the recess 47a that is the swing fulcrum portion 51 of the release lever 31. And the engagement of the protrusion 19b is maintained.

  As shown in FIG. 9, an opening 80 into which the operation portion 69 of the operation handle 33 is inserted is formed at the front end of the release lever 31, and the bent flange 66 serving as the periphery of the opening that forms the periphery of the opening 80 is formed. Is provided with a slit 81 in the lower part for allowing the front elastic deformation part 41 of the lock member 17 to enter from below. In this case, the assembly of the operation handle 33 is pushed down through the slit 81 when the front elastic deformation portion 41 is pushed down. Then, the operation handle 33 can be easily inserted into the release lever 31 through the opening 80 in a state where the front elastic deformation portion 41 is pushed down.

  In the present embodiment, the operation portion 69 of the operation handle 33 has a flange 69c protruding along the front-rear direction at the lower end, and the front side wall 55 of the release lever 31 is located on the upper surface of the flange 69c. A bent portion 65 as a lower surface portion with which the flange 69c abuts from above is provided below the bent flange 66. When a load is applied to the operation handle 33 downward, the front of the bent portion 65 is displaced downward with the bent portion 65 as a fulcrum, and the upper surface of the flange 69c is displaced rearward of the bent portion 65 upward. A second convex portion 47 d that contacts from below is formed so as to protrude inward from the side wall 47 of the release lever 31.

  The operation handle 33 swings counterclockwise in FIG. 2 with the bending portion 65 as a fulcrum while bending the front elastic deformation portion 41 when the front gripping portion receives a load downward. At this time, the upper surface 69a of the operation portion 69 (the distal end portion 67a of the arm portion 67) moves upward away from the operation handle receiving portion 37 of the lock member 17, and the distal end of the flange 69c is relative to the first convex portion 47c. The position is shifted in the vertical direction.

  Thereby, when the operation handle 33 is pushed downward, even if a load is applied to the operation handle 33 backward, the action of the load on the release lever 31 can be avoided, and the release lever 31 can be moved rearward. Can be suppressed. Further, when the upper surface 69a of the operation portion 69 (the distal end portion 67a of the arm portion 67) moves upward away from the operation handle receiving portion 37 of the lock member 17, the flange 69c is moved downward from the second convex portion 47d. By abutting, the operation handle 33 can be prevented from swinging more than necessary. Such an unnecessary swing suppression effect of the operation handle 33 is effective in a state where the upper rail 5 protrudes forward with respect to the lower rail 3.

  In this embodiment, the locking projection accommodating portion 71 is provided on the upper rail 5 and the locking projection 61 is provided on the release lever 31. Therefore, when the release lever 31 moves rearward without providing additional parts. Unlocking can be suppressed. Since the bent flange 66 including the locking projection 61 is bent so as to protrude outward, it is possible to prevent the entire bent flange 66 from interfering when the lock member 17 is assembled to the release lever 31. When the release lever 31 and the lock member 17 in the assembled state are assembled to the upper rail 5, the bent flange 66 including the locking protrusion 61 may be inserted into the recess 73 from the front end of the upper rail 5, and can be easily assembled. Can do.

  Further, the swing fulcrum portion 51 can be set within the approximate thickness of the lock member 17 formed of a leaf spring, and the swing fulcrum structure can be made more compact.

  When the release lever 31 receives an impact and moves backward, the recess 47a is disengaged from the protrusion 19b. At this time, since the release lever 31 only moves downward by the approximate height of the protruding portion 19b of the portion that has entered the recess 47a, the downward movement amount is extremely small. For this reason, when the recess 47a is detached from the protruding portion 19b, the amount by which the release lever 31 pushes the lock member 17 downward is extremely small, and the unlocking can be more reliably suppressed.

  The load setting when the recess 47a is detached from the protrusion 19b can be easily made by changing the shape of the recess 47a or the protrusion 19b. For example, the lower portion of the protruding portion 19b may have a curved surface shape that protrudes downward in accordance with the curved surface shape of the recess 47a. The recess 47a may have a shape in which the bottom is planar and an inclined surface is provided in front of and behind the planar bottom.

  As mentioned above, although embodiment of this invention was described, these embodiment is only the illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom.

3,103 Lower rail 5,105 Upper rail 17,117 Lock member 19,119 Lock member fixing portion (base)
19b, 119b Lock member protrusion (swing fulcrum)
23,123 Rear elastic deformation portion (rear biasing portion) of lock member
25,125 Locking tooth of locking member (locking part)
27,127 Lower rail lock groove (locked part)
31, 131 Release lever 33, 133 Operation handle 33a Step portion (fitting recess) of the operation handle
35, 135 First forward inclined portion of the lock member (handle contact portion)
37,137 Operation handle receiving part (handle support part)
41, 141 Front elastic deformation portion (front biasing portion) of lock member
45, 145 Front end claw part (fitting protrusion) of the front elastic deformation part
47a, 147a Release lever recess (swing fulcrum)
47c, 147c Release lever first convex portion 47d, 147d Release lever second convex portion 51, 151 Oscillating fulcrum portion 53, 153 Release lever release pressing portion 55 Release lever front side wall (operating portion)
59,159 Release lever operating part 61 Release lever locking projection (operating part)
65 Bent part of release lever (bottom part)
66 Bending flange of release lever (periphery of opening)
69,169 Operation part of operation handle (rear connection part)
69c, 169b3 Operation handle flange 73f Front recess (downward movement restricting portion)
70, 170 Receiving concave portion of operation handle 80 Opening portion of release lever 81 Slit of bent flange 115 Fixing tool 115c Flange portion (protrusion) of fixing tool
147c First convex part (actuating part) of release lever
147e Locking protrusion of release lever 147g Bending piece of release lever (actuating part)
147h Restriction protrusion of release lever (actuating part)

Claims (9)

A lower rail extending along the longitudinal direction of the vehicle,
An upper rail that relatively moves along the longitudinal direction of the lower rail;
A locking member that is attached to the upper rail and includes a locking portion that is biased in a locking direction to engage with a locked portion formed on the lower rail;
A release pressing portion provided at a position overlapping the locking member in the longitudinal direction of the upper rail and capable of pressing the periphery of the locking portion of the locking member so as to release the engagement of the locking portion with the locked portion; A release lever comprising an operating portion that is operated by a handle unlocking operation, and a swing fulcrum provided between the release pressing portion and the operating portion;
The release lever is disposed on the lower side of the operation portion, and is supported rotatably with respect to the upper rail in front of the swing fulcrum portion of the release lever. The operation handle to be operated,
The locking member is
A base provided with the swing fulcrum and fixed to the upper rail;
A rear urging portion that is located behind the base and urges the locking portion in the locking direction;
A leaf spring provided integrally with a front urging portion that is positioned forward of the base and urges the operation handle upward and has a urging force weaker than that of the rear urging portion; A seat slide device characterized by comprising:   The swing fulcrum is rotatably engaged with a pair of protrusions protruding from left and right side ends of the base and a pair of recesses provided on an upper end of the side wall of the release lever. The seat slide device according to claim 1, wherein the engagement is maintained by an urging force of a leaf spring. A fixture for fixing the base of the lock member to the lower surface of the upper rail is provided;
The fixture includes a protrusion projecting sideways on the opposite side of the upper rail with the lock member in between,
3. The seat slide device according to claim 1, wherein the release lever includes a locking projection that is located above the projection. 4.   When the operation handle is operated upward and the operation portion of the release lever moves upward, the rear end of the rear connection portion of the operation handle comes into contact with the lock member from above, and the lock member The seat slide device according to claim 1, further comprising a handle support portion that supports the seat slide device. In the lock member, the base portion, the handle support portion, and the front biasing portion are connected stepwise in a side view, and extend in the front-rear direction,
The rear connection portion of the operation handle is formed in an inverted U-shaped cross section,
5. The seat slide device according to claim 4, wherein the handle support portion of the lock member is accommodated in the accommodation recess having an inverted U-shaped cross section in the rear connection portion from below. The front end of the front urging portion of the lock member includes a fitting protrusion that protrudes on both sides in the left-right direction or upward at a position in front of the operating portion of the release lever.
A fitting recess into which the fitting protrusion of the front urging portion is fitted is formed at a lower portion of the operation handle,
The seat slide device according to claim 5, wherein the front biasing portion of the lock member is accommodated in the accommodating recess that extends in the front-rear direction of the operation handle. The fitting protrusion of the front urging portion is located in front of the front end of the upper rail,
The seat slide device according to claim 6, wherein an interval between the end portions of the fitting protrusion is smaller than a width in a left-right direction of the operation handle. The release lever actuating portion is located in a downward movement restricting portion provided on the upper rail, and includes a locking projection that allows the release lever to rotate in the unlocking direction and restricts the downward movement of the release lever. ,
At the front end of the release lever is formed an opening into which the rear connection portion of the operation handle is inserted,
The opening periphery that forms the periphery of the opening includes a slit that allows the front biasing portion of the lock member to enter from below. 8. The seat slide device described. The rear connection part of the operation handle is formed with a flange protruding in the front-rear direction at the lower end and projecting to the left and right sides,
On the upper surface of the flange, the operating portion of the release lever that is operated by the unlocking operation of the operation handle is located, and at the lower part of the peripheral edge of the opening, a lower surface portion on which the flange abuts from above is provided.
When a load is applied to the operation handle, the front surface of the operation handle is displaced downward with respect to the lower surface portion and the rear surface of the operation handle is displaced upward with respect to the lower surface portion. 9. The seat slide device according to claim 8, wherein a second convex portion that abuts from below is formed so as to protrude inward from a side wall of the release lever.

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