JP2016145024A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an engaging property and operability compatible, while permitting rotations in the opposite direction of an operation lever.SOLUTION: A lock member 41 is equipped with a lock side fixing portion 42 fixed on an upper rail 20, a lock body 43 fitted with a lock groove of a lower rail 10, and a lock spring portion 44 for energizing the lock body 43 in a direction engaging with the lock groove. An operation lever 51 is made to abut on a lever fulcrum 72 and the lock body 43 disposed on the upper rail 20 to be held, by the energizing force of a lever spring 61 and the lock spring portion 44 provided on the upper rail 20. By upward rocking operation, the operation lever 51 is rotated about the lever fulcrum 72 to separate the lock body 43 from the lower rail 10, and by downward rocking operation, is rotated about the lock body 43.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seat slide device that can move a seat in the front-rear direction according to the physique of a seated person and fix the seat at a position desired by the seated person.

  As this type of seat slide device, there is one disclosed in Patent Document 1. As shown in FIG. 14, the seat slide device 101 includes a lower rail 110 that is installed on the vehicle body floor along the vehicle longitudinal direction, and an upper rail 120 that is fixed to the seat cushion while being movable in the lower rail 110. And a lock mechanism 140 for fixing the upper rail 120 at an arbitrary position on the lower rail 110.

  In the initial position, the lock mechanism 140 is locked by the state in which the lock plate 141 is fitted in the slit 113 by the urging force of the holding spring 160. Thereby, the upper rail 120 is fixed on the lower rail 110. Further, the lock mechanism 140 operates the operation lever 151 disposed on the upper rail 120 upward from the initial position, whereby the lock plate 141 is separated from the slit 113 of the lower rail 110 and the lock is released. As a result, the upper rail 120 can move on the lower rail 110. Further, the operating lever 151 swings downward by the urging force of the holding spring 160 and returns to the initial position, whereby the lock plate 141 is fitted into the slit 113 and locked.

  By the way, there is a case where an excessive load is applied to the operation lever 151 in the lock direction due to an accidental stepping on the operation lever. In this case, the lock plate 141 may bite into the slit 113 and the lock mechanism 140 may be damaged, resulting in deterioration in operability and play.

  Therefore, in order to prevent such a malfunction of the lock mechanism 140, Patent Document 1 discloses that the operation lever 151 is pivotably disposed with respect to the lock plate 141, and the holding spring 160 reverses the operation lever. A structure that absorbs the pivoting to the right is disclosed.

JP 2013-018400 A

  In the technique described in Patent Document 1, the operation lever 151 and the lock plate 141 are configured to swing integrally at a common rotation fulcrum 122.

  In the case of such a configuration, when the plate side rotation radius from the rotation fulcrum 122 to the claw portion fitted to the slit 113 of the lock plate 141 is increased, the operating angle of the operation lever 151 is decreased. Therefore, although the meshing property between the lock plate 141 and the slit 113 of the lower rail 110 can be improved, the operating angle of the operation lever 151 becomes small, so that the operability is deteriorated. That is, there is a problem that the meshing property and the operability cannot be made compatible.

  In view of the above circumstances, an object of the present invention is to provide a seat slide device capable of achieving both engagement and operability while allowing the operation lever to rotate in the reverse direction.

  The present invention relates to a lower rail extending along the longitudinal direction of the vehicle, an upper rail assembled to be movable relative to the lower rail along the longitudinal direction of the lower rail, and a lock side fixed to the upper rail. A fixing portion is provided on one end side, a lock main body that is detachable from a lock groove formed on the lower rail is provided on the other end side, and has elasticity to urge the lock main body in a direction to engage with the lock groove. A lock member provided between the lock-side fixing portion and the lock main body, wherein the lock main body swings removably with respect to the lower rail around the lock-side fixing portion; and the upper An operation lever that is inserted from the front end side of the rail and has an end on the front side in the insertion direction engaged with the lock body, and urges the lever operation portion side of the operation lever upward. In addition, a lever spring having a biasing force weaker than the biasing force of the lock spring portion, the upper rail, and the lock member are provided on one of the lever springs, and serve as a pivot point for the upward swinging operation of the operation lever. A lever fulcrum projecting downward, and the operation lever is pivoted upward to pivot about the lever fulcrum to separate the lock body from the lower rail and swing downward. Thus, it is characterized by rotating downward about the lock body against the lever spring.

  In the present invention, the rotation fulcrum of the lock body and the rotation center of the operation lever are set at different parts, so that the rotation radius of the lock body can be increased and the operation angle of the operation lever can be increased. Thus, both the meshing property and the operability can be achieved.

1 is an exploded perspective view of a seat slide device showing a first embodiment of the present invention. It is a top view which shows the locked state of the seat slide apparatus of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 showing an assembly in which the lower rail, upper rail, friction reducing means, and lock mechanism of the seat slide device in FIG. 1 are assembled. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. The lever spring in the seat slide apparatus of FIG. 1 is shown, (a) is a top view, (b) is a side view. It is sectional drawing which shows a lock release state with respect to the lock state of FIG. It is sectional drawing along the IX-IX line of FIG. It is sectional drawing which shows the state which the operation lever rotated in the reverse direction with respect to the locked state of FIG. It is a top view of the seat slide apparatus which shows the 2nd Embodiment of this invention. FIG. 12 is a cross-sectional view taken along XII-XII in FIG. 11. FIG. 12 is a side view showing an operation lever and a lock member of the seat slide device of FIG. 11. It is sectional drawing which shows a prior art.

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

  The seat slide apparatus 1 according to the first embodiment of the present invention shown in FIGS. 1 to 4 is a manual type. The seat slide device 1 is installed on a floor surface of a vehicle, and is installed on a lower rail 10 extending along the vehicle front-rear direction and a back surface of a seat seat portion (not shown), and extends along the longitudinal direction of the lower rail 10. And an upper rail 20 assembled so as to be relatively movable in the lower rail 10.

  Between the lower rail 10 and the upper rail 20, a friction reducing means 30 and a lock mechanism 40 are disposed, respectively. The friction reducing means 30 is a friction reducing mechanism that reduces the frictional resistance when the upper rail 20 moves relative to the lower rail 10. The lock mechanism 40 fixes the upper rail 20 to a desired position in the lower rail 10 by the occupant.

  FIG. 5 shows the assembly 1a in a state in which the lower rail 10, the upper rail 20, the lock mechanism 40, and the like are assembled. The assembly 1a of FIG. 5 is disposed between the seat seat portion and the floor surface in parallel with each other along the vehicle front-rear direction. The left and right assemblies 1a are linked by an operation lever 51 shown in FIGS.

  As shown in FIGS. 4 and 6, the lower rail 10 includes a lower bottom wall 11 a having a rectangular plate shape extending in the vehicle front-rear direction. A pair of left and right lower outer walls 11b rises upward at an angle of about 90 degrees with respect to the lower bottom wall 11a from both ends of the lower bottom wall 11a in the vehicle width direction. A pair of left and right lower upper walls 11c extending in parallel with the lower bottom wall 11a from the upper end edges of the pair of left and right lower outer walls 11b toward the opposed lower outer walls 11b is provided.

  A pair of left and right lower inner walls (lower side walls) 11d that hangs downward from the inner end edges of the pair of left and right lower upper walls 11c toward the lower bottom wall 11a is provided. In addition, the space | interval between the lower inner side walls 11d which oppose in a mutually parallel state is set so that the upper rail 20 accommodated in the lower rail 10 can move.

  The outer end portion in the vehicle width direction of the lower bottom wall 11a and the lower end portion of each lower outer wall 11b are smoothly continuous by a lower lower arc portion 11e formed by an arc surface. The upper end portion of each lower outer wall 11b and the outer end portion in the vehicle width direction of each lower upper wall 11c are smoothly continuous by a lower upper arc portion 11f formed by an arc surface. The lower bottom wall 11a is fixed on the floor surface of the vehicle via a female screw member (not shown) and a bolt (not shown) as a lower fixing portion when being fixed on the vehicle floor surface.

  The upper rail 20 includes an upper top wall 21a having a rectangular plate shape extending in the longitudinal direction of the vehicle body. A pair of left and right upper side walls 21b hang downward from both ends of the upper ceiling wall 21a in the vehicle width direction. Upper lower inclined walls 21c rise obliquely upward from the lower ends of the upper side walls 21b. From upper end edges of the pair of left and right upper lower inclined walls 21c, an upper upper inclined wall 21d rises obliquely upward toward each upper side wall 21b.

  The upper ceiling wall 21a is fixed to the back side of the seat seat via a bolt (not shown) or the like as an upper fixing portion for fixing to the back side of the seat seat. In addition, the dimensions of each part of the upper rail 20 are set so that the upper lower inclined wall 21c and the upper upper inclined wall 21d are arranged so as to be movable in the lower rail 10 along the vehicle front-rear direction.

  The friction reducing means 30 shown in FIG. 1 includes a lower guide ball 31 and an upper guide ball 32 made of a metal spherical body, and a retainer 33 that supports the lower guide ball 31 and the upper guide ball 32. The retainer 33 supports the lower guide ball 31 such that it can roll between the lower lower circular arc portion 11e and the upper lower inclined wall 21c shown in FIG. 4 and the upper guide ball 32 with the lower upper circular arc portion 11f. It is supported so that it can roll between the upper inclined wall 21d.

  The friction reducing means 30 of the present embodiment is set so that the diameter of the lower guide ball 31 is larger than the diameter of the upper guide ball 32. The retainer 33 supports a total of four lower guide balls 31 and two upper guide balls 32. The friction reducing means 30 are arranged at two front and rear positions in the accommodating portion 12 (FIGS. 4 and 6) surrounded by the lower outer wall 11b, the lower upper wall 11c, and the lower inner wall 11d, and is attached to the pair of left and right assemblies 1a. There are a total of four locations.

  The lock mechanism 40 includes a lock member 41, an operation lever 51, and a lever spring 61. The lock member 41 is disposed on the upper ceiling wall 21a so as to be swingable in the vertical direction between the left and right upper side walls 21b. The operation lever 51 performs a swinging operation of the lock member 41. The lever spring 61 biases and holds the operation lever 51. The lock mechanism 40 includes a plurality of slits 13 that open at the lower edge of the lower inner wall 11d and serve as lock grooves formed in a comb shape.

  The lock member 41 is made of a plate-like elastic material, and a lock side fixing portion 42 for fixing to the upper rail 20 is formed on a plate surface on one end side on the vehicle front side. The lock member 41 includes a lock main body 43 for engaging with the lower rail 10 on the other end side on the vehicle rear side. Between the lock-side fixing portion 42 and the lock main body 43, a lock spring portion 44 that constantly applies a biasing force in a direction in which the lock main body 43 engages with the lower rail 10 is set by an elastic force.

  The lock side fixing portion 42 has an attachment hole, and is fixed to the lock fixing hole 22 opened in the upper top wall 21 a of the upper rail 20 via the lock fixing pin 26. The lock main body 43 swings up and down around the lock-side fixing portion 42 due to elastic deformation of the lock spring portion 44.

  The lock main body 43 is provided with a plurality of fitting protrusions 45 on the plate thickness surface facing the upper side wall 21b so as to be engageable with the slit 13 of the lower inner side wall 11d. That is, the plurality of fitting protrusions 45 are provided so as to protrude toward the lower inner wall 11d. The lower inner wall 11d is substantially parallel to the vertical swing surface of the lock member 41 and has a surface along the swing surface.

  As the lock main body 43 swings with the swing of the lock member 41, the fitting protrusion 45 of the lock main body 43 fits into and disengages from the slit 13. That is, the fitting protrusion 45 is displaced with respect to the slit 13 between a fitted state and a detached state from the fitted state. The slit 13 has an arc shape along the rotation locus of the fitting protrusion 45. Further, as shown in FIGS. 3 and 4, a fitting long hole 23 having a long hole shape slightly larger than the slit 13 is opened on both upper side walls 21 b of the portion overlapping the slit 13 of the lower inner side wall 11 d. Yes. The fitting protrusion 45 is fitted into and detached from the slit 13 while penetrating the fitting long hole 23.

  The lock main body 43 is provided on the upper surface so that a hemispherical slidable contact protrusion 46 protrudes upward. The lower surface of a working side end 55 of the operation lever 51 described later is in sliding contact with the sliding contact projection 46. That is, the lock main body 43 includes a sliding contact protrusion 46 that protrudes toward the operation lever 51 at a portion where the operation lever 51 abuts.

  The lock spring 44 has elasticity since the lock member 41 is made of an elastic material. As shown in FIG. 3, the lock spring portion 44 has a boundary portion with the lock side fixing portion 42 and a boundary portion with the lock main body 43 bent in a stepped manner, and the lock side fixing portion 42, the lock main body 43, The lock spring portion 44 is formed substantially parallel to each other. In a state where the lock side fixing portion 42 is fixed to the upper ceiling wall 21a, the lock spring portion 44 is separated from the upper ceiling wall 21a, and the lock body 43 is further separated from the upper ceiling wall 21a than the lock spring portion 44 is. Yes.

  By bending the boundary portion between the lock spring portion 44 and the lock-side fixing portion 42, the lock spring portion 44 is separated from the upper top wall 21a, so that when the lock member 41 swings, the lock spring portion 44 abuts against the upper top wall 21a. Generation of hitting sound is suppressed. Further, an insertion hole 47 made of a long hole extending from the lock side fixing portion 42 toward the lock body 43 is provided at a bent portion of the boundary between the lock spring portion 44 and the lock body 43. The working side end 55 of the operation lever 51 is inserted from the lower side to the upper side of the insertion hole 47.

  As shown in FIG. 3, the fulcrum member 71 is disposed below the lock spring portion 44 of the lock member 41 between the upper side walls 21 b and between the lock-side fixing portion 42 and the lock main body 43 in the vehicle front-rear direction. As shown in FIGS. 1 and 3, the fulcrum member 71 is provided on the lower surface so that the lever fulcrum 72 protrudes downward. As shown in FIGS. 1 and 2, the fulcrum member 71 is provided on the plate thickness surface facing the upper side wall 21 b so that a plurality of fulcrum side fixing portions 73 protrude toward the upper side wall 21 b.

  The lever fulcrum 72 has a semi-cylindrical shape extending in the vehicle width direction, and a semi-cylindrical portion protrudes downward. The fulcrum side fixing portion 73 is a projection that fits into the fulcrum installation hole 24 that opens in the upper side wall 21b shown in FIG. 1, and the fulcrum side fixing portion 73 is fitted into the fulcrum installation hole 24 so that the fulcrum member 71 It is fitted between the upper side walls 21b. 2 and 3, the fulcrum installation hole 24 is omitted. The fulcrum member 71 is not in contact with the lock spring portion 44 even when the lock main body 43 of the lock member 41 is rotated to the unlocking position where the lock main body 43 is detached from the slit 13.

  The operation lever 51 is made of a pipe-like member, and is extended in parallel from both ends of the lever operation portion 52 disposed along the vehicle width direction toward the vehicle rear from both ends of the lever operation portion 52. And a lever arm portion 53 to be inserted.

  The lever arm portion 53 is bent upward in a substantially L shape on the lever operation portion 52 side, and the lever operation portion 52 rises upward. The lever arm 53 is inserted between the upper side walls 21b at a portion corresponding to the L-shaped horizontal image. Each end on the front end side in the insertion direction of the lever arm 53 is inserted as a working end 55 into the insertion hole 47 of the lock member 41 and inserted to a position facing the sliding contact projection 46. .

  In addition, the lever arm portion 53 includes a spring receiving portion 54 on the lower surface facing the lower bottom wall 11a on the front side (on the lever operation portion 52 side) with respect to the fulcrum member 71. The spring receiving portion 54 is configured by a concave groove extending along the vehicle width direction. The spring receiving portion 54 engages with a contact support portion 63 of a lever spring 61 (FIG. 7) described later, and is biased upward by the contact support portion 63. Thereby, the upper surface of the lever arm part 53 is hold | maintained in the state contact | abutted to the lever fulcrum 72 of the fulcrum member 71 like FIG.

  The portion inserted between the upper side walls 21b of the lever arm portion 53 is a flat portion 53a having a substantially semicircular cross-section by crushing the pipe from the vertical direction. As for the front-end | tip part (working side edge part 55) of the flat part 53a, the left-right part is further folded in two upwards, and the cross-sectional substantially rectangular shape is formed as shown in FIG. As shown in FIG. 3, a fulcrum contact portion 53 b that contacts the lever fulcrum 72 is set in the flat portion 53 a. That is, the flat portion 53a is formed such that a portion inserted into the upper rail 20 between the front end portion of the upper rail 20 and the lever fulcrum 72 is crushed from the vertical direction and thinned in the vertical direction. The part inserted into the upper rail 20 corresponds to a part disposed between the upper side walls 21b.

  As shown in FIG. 1 and FIG. 7, the lever spring 61 is configured in a shape in which an elastic cross-section of a linear rod material is substantially folded in half, and includes a spring-side fixing portion 62, a contact support portion 63, A biasing arm portion 64 and a lowering portion 65 are provided.

  A pair of spring-side fixing portions 62 are set at both ends of the wire rod, and the lever spring 61 is fixed to the upper rail 20 by fitting into the spring fixing portion 25 that opens to the upper side wall 21b. As shown in FIG. 7A, the spring-side fixing portion 62 is curved in a substantially U shape toward the outside of the fold. The U-shaped portion of the spring-side fixing portion 62 that is curved in a substantially U-shape is inserted into the elongated hole-shaped spring fixing portion 25 that opens along the longitudinal direction of the upper side wall 21b as shown in FIGS. Is done. The spring fixing portion 25 is formed on the upper side wall 21b at a position above the lower rail 10 (lower upper wall 11c).

  The contact support portion 63 is set at a portion where the linear member is folded in half, engages with the spring receiving portion 54 of the operation lever 51, supports the operation lever 51 upwardly, and moves in the longitudinal direction. To regulate. The contact support portion 63 is formed in a straight line along the vehicle left-right direction, and the length dimension of the straight line portion is set to be larger than the diameter of the operation lever 51.

  The urging arm portion 64 has a spring-side fixing portion 62 extending on one end side and a contact support portion 63 extending on the other end side. The urging arm portion 64 is set to generate an elastic force that is weaker than the urging force of the lock spring portion 44 and can support the weight of the operation lever 51. Further, the interval between the urging arm portions 64 is set to be narrower than the width dimension of the flat portion 53 a of the operation lever 51. The length dimension of the urging arm portion 64 is set so that the contact support portion 63 protrudes from the end portion of the upper rail 20 as shown in FIGS.

  Next, an assembly procedure of the seat slide device 1 will be described.

  First, the mounting hole of the lock side fixing portion 42 of the lock member 41 is overlapped with the lock fixing hole 22 of the upper rail 20, and the lock fixing pin 26 is passed through both the holes and swaged, whereby the lock member 41 is attached to the upper rail 20. To fix.

  Next, the fulcrum member 71 is inserted from the lower side of the upper rail 20 while increasing the distance between the upper side walls 21b. After the insertion, the fulcrum member 71 is attached to the upper rail 20 by fitting the fulcrum side fixing portion 73 of the fulcrum member 71 into the fulcrum installation hole 24 opened in the upper side wall 21b.

  Next, the lever spring 61 is inserted between the upper side walls 21b while the biasing arm portion 64 of the lever spring 61 is bent to narrow the interval between the biasing arm portions 64. After the insertion, the lever spring 61 is attached to the upper rail 20 by inserting the spring side fixing portion 62 into the spring fixing portion 25 by a bending reaction force.

  The friction reducing means 30 is disposed in the lower rail 10. The upper rail 20 is inserted into the lower rail 10 from the front end side of the lower rail 10. At this time, the upper rail 20 is inserted into the lower rail 10 until the fitting long hole 23 of the upper rail 20 and the slit 13 of the lower rail 10 overlap.

  Next, the operation lever 51 is inserted between the urging arm portions 64 in a state where the contact support portion 63 of the lever spring 61 is pressed down. Here, when the operating lever 51 is inserted, the working side end portion 55 is inserted into the insertion hole 47 upward from below while expanding the interval between the urging arm portions 64 of the lever spring 61 with the flat portion 53a. The working side end portion 55 is brought into contact with the sliding contact projection 46. At this time, the contact support portion 63 is engaged with the concave groove of the spring receiving portion 54, so that the position of the operation lever 51 in the longitudinal direction with respect to the upper rail 20 is fixed.

  When the operation lever 51 is assembled, the operation lever 51 is swung upward to release the lock, the upper rail 20 is further inserted into the lower rail 10, and the upper rail 20 is moved to an arbitrary position. . When the upper rail 20 has moved, the operation lever 51 is returned to the original state to bring it into a locked state, whereby the assembly is completed.

  In the above configuration, in the initial state (initial position) shown in FIGS. 2 and 3 assembled as the seat slide device 1, the operation lever 51 has the fulcrum abutting portion 53 b caused by the urging force upward from below the lever spring 61. The lever fulcrum 72 is pressed against and held. Further, in the initial state, the operation lever 51 is held by the action side end portion 55 being pressed against the sliding contact protrusion 46 of the lock main body 43 by the urging force from the lower side to the upper side of the lock spring portion 44. As a result, the state in which the fitting protrusion 45 of the lock main body 43 is fitted to the bottom portion of the slit 13 while passing through the fitting elongated hole 23 is maintained.

  When the occupant swings the lever operation portion 52 of the operation lever 51 upward from the initial state (normal operation), the operation lever 51 rotates around the lever fulcrum 72, and as shown in FIG. The portion 55 pushes down the lock main body 43. That is, the lever fulcrum 72 serves as a rotation fulcrum when the operation lever 51 is swung upward. When the lock main body 43 is displaced downward, the fitting protrusion 45 is detached downward from the slit 13 and separated from the lower rail 10. As a result, the fitting and locking between the upper rail 20 and the lower rail 10 are released, and the upper rail 20 can be relatively moved on the lower rail 10.

  When the upper rail 20 is moved to a desired position of the occupant and the swing operation is stopped, the operation lever 51 is rotated about the lever fulcrum 72 by the urging force of the lock spring portion 44 and the lever spring 61, and is in an initial state. Return to. When the operation lever 51 returns to the initial state, the fitting protrusion 45 moves into the slit 13 as shown in FIG. 3, and the upper rail 20 and the lower rail 10 are fitted and locked.

  In the initial state of FIG. 3, when an occupant mistakenly performs an operation such as stepping on the lever operation unit 52 of the operation lever 51, the lever operation unit 52 resists the biasing force of the lever spring 61 as shown in FIG. 10. Swings downward. At this time, the lever operating portion 52 swings around the sliding contact projection 46 of the lock main body 43, so that the fulcrum contact portion 53 b is separated from the lever fulcrum 72. In this case, since the fitting protrusion 45 is kept in the position in the slit 13, the lock mechanism 40 is not broken and the locked state is kept.

  In the present embodiment, the lock-side fixing portion 42 serving as the rotation fulcrum of the lock body 43 and the lever fulcrum 72 serving as the rotation center of the operation lever 51 are set in different parts in the vehicle front-rear direction. For this reason, the rotation radius of the lock body 43 can be increased, and the operation angle of the operation lever 51 can be increased. Thereby, the compatibility of the fitting protrusion 45 and the slit 13 and the operability by the operation lever 51 can be achieved.

  In the present embodiment, the lever fulcrum 72 is disposed on a portion of the upper rail 20 positioned between the lock-side fixing portion 42 and the lock main body 43 in the vehicle front-rear direction. For this reason, the lever operation part 52 of the operation lever 51 can be swung upwardly with a larger operation angle from the initial state around the lever fulcrum 72 provided on the upper rail 20.

  In the present embodiment, the lever fulcrum 72 protrudes from a fulcrum member 71 fitted between the upper side walls 21b. For this reason, the fulcrum member 71 can be fitted from the lower side of the upper rail 20, and the assembling property is improved.

  In the present embodiment, the lock main body 43 at a portion where the working side end 55 of the operation lever 51 abuts is provided with a sliding contact projection 46 that projects toward the working side end 55. As a result, when an erroneous operation such as stepping on the lever operation portion 52 is performed, the operation lever 51 swings more smoothly with the sliding contact projection 46 as a fulcrum.

  In the present embodiment, the lock main body 43 has a fitting protrusion 45 that protrudes toward the lower rail 10 at a site along the swing surface, and the lower rail 10 is a slit that becomes a lock groove into which the fitting protrusion 45 can be fitted and removed. The slit 13 has a circular arc shape along the rotation locus of the fitting protrusion 45. Thereby, the swinging operation of the operation lever 51 and the fitting projection 45 with respect to the slit 13 can be smoothly performed.

  In the present embodiment, the operation lever 51 is made of a pipe-like member, and the portion to be inserted into the upper rail 20 between the end of the upper rail 20 and the lever fulcrum 72 is crushed from the vertical direction. Thereby, while ensuring the strength of the operation lever 51, the vertical dimension of the upper rail 20 can be kept small, and the operation angle of the operation lever 51 can be increased.

  In the state where the fulcrum member 71 is assembled to the upper rail 20, even if there is some backlash between the fulcrum member 71 and the upper side wall 21b, in the state where the upper rail 20 is assembled to the lower rail 10, the left and right The upper side wall 21b bends inward to reduce the interval between each other. For this reason, in the assembled state, the backlash of the fulcrum member 71 can be suppressed. Thereby, since high dimensional accuracy is not required, manufacturing cost can be reduced.

  The operation lever 51 is assembled between the upper side walls 21b in a state where the flat portion 53a spreads the urging arm portion 64 of the lever spring 61. For this reason, after the assembly, the bending deformation of the urging arm portion 64 in the direction in which the spring side fixing portion 62 of the lever spring 61 is detached from the spring fixing portion 25 is suppressed by the operation lever 51.

  When the operation lever 51 is deformed by stepping or the like, the contact support portion 63 of the lever spring 61 is pushed down, the engagement between the contact support portion 63 and the spring receiving portion 54 is released, and the operation lever 51 is pulled out. . Thereby, the operation lever 51 can be easily replaced without using a tool or the like.

  11 to 13 show a seat slide device 1A according to a second embodiment of the present invention.

  The seat slide device 1A according to the second embodiment has substantially the same configuration as the seat slide device 1 according to the first embodiment, including a lower rail 10A, an upper rail 20A, and an operation lever 51A.

  The seat slide device 1A is greatly different from the seat slide device 1 in the following two points. (1) Instead of the lever fulcrum 72 of the fulcrum member 71 shown in FIG. 3, the lever fulcrum 72A is provided integrally with the lock member 41A. (2) The operation lever 51A has a lever arm portion 53A formed of a rod-shaped plate member, and is connected and fixed to the lever operation portion 52A of the pipe member. Other configurations are substantially the same as those in the first embodiment, and the same components will be described by adding the same reference numerals or “A” after the same reference symbols.

  First, (1) will be described. Similarly to the lock member 41 of the first embodiment, the lock member 41A is made of a plate-like elastic material, and includes a lock-side fixing portion 42A, a lock body 43A, and a lock spring portion 44A.

  The lock side fixing portion 42A is fixed to the upper top wall 21a of the upper rail 20A, and the lock main body 43A includes a fitting protrusion 45A that fits into the slit 13 of the lower rail 10A. The lock spring portion 44A constantly applies a biasing force in a direction in which the lock main body 43A is engaged with the lower rail 10A.

  The lock spring portion 44A has a boundary portion with the lock side fixing portion 42A and a boundary portion with the lock main body 43A bent in a step shape, and the lock side fixing portion 42A, the lock main body 43A, and the lock spring portion 44A are mutually connected. It is formed substantially in parallel. In a state where the lock side fixing portion 42A is fixed to the upper ceiling wall 21a, the lock spring portion 44A is separated from the upper ceiling wall 21a, and the lock body 43A is further separated from the upper ceiling wall 21a than the lock spring portion 44A. Yes.

  An insertion hole 47A, which is a long hole extending from the lock-side fixing portion 42A toward the lock body 43A, is provided at a bent portion of the boundary between the lock spring portion 44A and the lock body 43A. The working side end 55A of the operation lever 51A is inserted from the lower side to the upper side of the insertion hole 47A.

  A lever fulcrum 72A that protrudes downward is provided at a boundary portion between the lock spring portion 44A and the lock-side fixing portion 42A. Similarly to the lever fulcrum 72 of the first embodiment, the lever fulcrum 72A has a semi-cylindrical shape extending in the vehicle width direction, and a semi-cylindrical portion protrudes downward.

  The lock main body 43A is provided on the upper surface so that a hemispherical slidable contact protrusion 46A protrudes upward. The lower surface of the working side end portion 55A of the operation lever 51A is in sliding contact with the sliding contact protrusion 46A.

  As described above, in the operation lever 51A, the lever operation portion 52A is constituted by a pipe member, and the lever arm portion 53A is constituted by a rod-like plate member. The lever arm portion 53A is bent upward in a substantially L shape on the lever operation portion 52A side, and the distal end portion 53A1 is inserted and fixed inside the pipe member of the lever operation portion 52A.

  A fulcrum abutting portion 53bA that abuts on the lever fulcrum 72A is set at approximately the center in the longitudinal direction of the lever arm portion 53A. The operation lever 51A swings around a lever fulcrum 72A with which the fulcrum contact portion 53bA contacts.

  A stepped portion 57 that rises upward from the fulcrum contact portion 53bA side toward the working side end portion 55A is formed on the upper portion of the portion inserted into the insertion hole 47A of the lever arm portion 53A. In the initial state of FIG. 12, the stepped portion 57 is positioned in the vicinity of the rear side of the vehicle with respect to the edge 47A1 on the lever fulcrum 72A side of the insertion hole 47A, and serves as a stopper from the insertion hole 47A of the working end 55A. Function.

  The lever arm portion 53A includes a spring receiving portion 54A formed of a concave groove on the lower surface facing the lower bottom wall 11a on the front side (lever operation portion 52A side) of the lever fulcrum 72A. The spring receiving portion 54 </ b> A is urged upward by the contact support portion 63 while the contact support portion 63 of the lever spring 61 is engaged.

  The lever spring 61 has substantially the same shape as that of the first embodiment, and the spring side fixing portion 62 is fitted to the spring fixing portion 25 of the upper rail 20A. The spring fixing portion 25 of the upper rail 20A is formed from the upper side wall 21b to the upper top wall 21a.

  In the above-described configuration, in the initial state (initial position) shown in FIGS. 11 and 12 assembled as the seat slide device 1A, the operation lever 51A causes the fulcrum contact portion 53bA to be moved by the urging force upward from the lower side of the lever spring 61. The lever fulcrum 72A is pressed and held. Further, in the initial state, the operating lever 51A is pressed and held by the slidable contact protrusion 46A of the lock main body 43A by the urging force of the lock spring 44A from below to above. Accordingly, the state in which the fitting protrusion 45A of the lock main body 43A is fitted to the bottom portion of the slit 13 while passing through the fitting elongated hole 23 is maintained.

  When the occupant swings the lever operation part 52A of the operation lever 51A upward from the initial state (normal operation), the operation lever 51A rotates around the lever fulcrum 72A, as described in FIG. Similarly, the working side end 55A pushes down the lock body 43A. When the lock main body 43A is displaced downward, the fitting protrusion 45A is detached downward from the slit 13 and separated from the lower rail 10A. As a result, the fitting and locking between the upper rail 20A and the lower rail 10A are released.

  When the upper rail 20A is moved to the desired position of the occupant, when the swing operation is stopped, the operating lever 51A is rotated about the lever fulcrum 72A by the urging force of the lock spring portion 44A and the lever spring 61, and is in an initial state. Return to. When the operation lever 51A returns to the initial state, the fitting protrusion 45A moves into the slit 13.

  In the initial state of FIG. 12, when an occupant mistakenly performs an operation such as stepping on the lever operation unit 52 </ b> A, the lever operation unit 52 </ b> A swings downward against the urging force of the lever spring 61. At this time, the lever operating portion 52A swings around the sliding contact protrusion 46A of the lock main body 43A, so that the fulcrum contact portion 53bA is separated from the lever fulcrum 72A.

  In this case, the state in which the fitting protrusion 45A remains in the slit 13 is maintained. For this reason, the locked state is maintained without breaking the lock mechanism 40A. In addition, an interval is provided between the step portion 57 of the lever arm portion 53A and the edge portion 47A1 of the insertion hole 47A so that the lever operation portion 52A does not come into contact when swinging around the sliding contact projection portion 46A. Yes.

  Also in the present embodiment, the lock side fixing portion 42A serving as the rotation fulcrum of the lock main body 43A and the lever fulcrum 72A serving as the rotation center of the operation lever 51A are set at different parts in the vehicle front-rear direction. For this reason, the rotation radius of the lock body 43A can be increased, and the operation angle of the operation lever 51A can be increased. Thereby, the compatibility of the fitting protrusion 45A and the slit 13 and the operability by the operation lever 51A can be achieved.

  In the present embodiment, the lever fulcrum 72A is integrally provided on the lock member 41A between the lock side fixing portion 42A and the lock main body 43A in the vehicle front-rear direction. For this reason, compared with the structure which requires the fulcrum member 71 provided with the lever fulcrum 72 as a member different from the lock member 41 as in the first embodiment, the number of parts is reduced and the assembly workability is improved. Can be achieved.

  In the present embodiment, the contact support portion 63 of the lever spring 61 is engaged with the spring receiving portion 54A of the operation lever 51A, so that the operation lever 51A is removed from the insertion hole 47A as in the first embodiment. A stop is made. In addition, when the edge portion 47A1 of the insertion hole 47A is engaged with the stepped portion 57 of the operation lever 51A, the operation lever 51A is more reliably prevented from coming off from the insertion hole 47A.

  The present invention is not limited to the embodiments described above, and various modifications can be made. For example, in the first embodiment, the lever arm portion 53 is integrally formed with the lever operation portion 52 with a pipe member, but as in the second embodiment, the lever arm portion is formed with a bar member or a plate member, You may make it connect and fix to a lever operation part. Conversely, in the second embodiment, even if the lever arm portion 53A is integrally formed with the lever operation portion 52A with a pipe member and the portion inserted into the upper rail 20A of the lever arm portion is crushed from the vertical direction. Good.

DESCRIPTION OF SYMBOLS 1,1A ... Seat slide apparatus 10, 10A ... Lower rail 11a ... Lower bottom wall 11b ... Lower outer wall 11c ... Lower upper wall 11d ... Lower side wall (lower inner side wall)
11e ... Lower lower arc portion 11f ... Lower upper arc portion 13 ... Slit (lock groove)
20, 20A ... Upper rail 21a ... Upper ceiling wall 21b ... Upper side wall 21c ... Upper lower inclined wall 22 ... Lock fixing hole 30 ... Friction reducing means 41, 41A ... Lock member 42, 42A ... Lock side fixing portion (mounting hole)
43, 43A ... Lock body 44, 44A ... Lock spring portion 45, 45A ... Fitting projection 46, 46A ... Sliding contact projection 51, 51A ... Operation lever 61 ... Lever spring 71 ... Supporting member 72, 72A ... Lever fulcrum

Claims (7)

A lower rail extending along the longitudinal direction of the vehicle,
An upper rail assembled so as to be movable relative to the lower rail along the longitudinal direction of the lower rail;
A lock-side fixing portion that is fixed to the upper rail is provided on one end side, a lock body that is detachable from a lock groove formed on the lower rail is provided on the other end side, and the lock body is engaged with the lock groove. A lock spring portion having elasticity that urges the lock body in a moving direction is provided between the lock side fixing portion and the lock main body, and the lock main body can be fitted to and removed from the lower rail with the lock side fixing portion as a center. A rocking lock member;
An operation lever that is inserted from the front end side of the upper rail and that engages with the lock body at the front end in the insertion direction;
A lever spring having a biasing force weaker than a biasing force of the lock spring part, while biasing the lever operating part side of the operation lever upward,
A lever fulcrum provided on either one of the upper rail and the lock member, and projecting downward as a pivotal fulcrum in an upward swinging operation of the operation lever,
The operation lever is
The lock body is pivoted about the lever fulcrum by an upward swing operation to separate the lock body from the lower rail, and the downward swing operation is performed downward about the lock body against the lever spring. A seat slide device that rotates. The seat slide device according to claim 1,
The lever fulcrum is
A seat slide device, wherein the seat slide device is disposed on the upper rail positioned between the lock-side fixing portion and the lock body in a vehicle front-rear direction. The seat slide device according to claim 1,
The lever fulcrum is
A seat slide device characterized by being provided integrally with the lock member between the lock-side fixing portion and the lock body in the vehicle front-rear direction. The seat slide device according to claim 1 or 2,
The lower rail is
A lower bottom wall having a rectangular shape extending in the longitudinal direction of the vehicle;
Lower outer wall erected upward via a lower lower arc formed by an arc surface from both end edges in the vehicle width direction of the lower bottom wall;
Lower upper walls extending from the upper edge of both lower outer walls to the lower outer walls facing each other via the lower upper arc portion constituted by the arc surface,
A lower side wall hanging downward from an inner edge of the lower upper wall,
The upper rail is
An upper ceiling wall having a rectangular shape extending in the longitudinal direction of the vehicle body;
An upper side wall that hangs downward from both ends in the vehicle width direction of the upper ceiling wall into the lower rail;
An upper lower inclined wall standing upright and obliquely upward in the lower rail from the lower end edge of the upper side wall,
Friction reducing means for reducing friction between the lower lower arc portion and the upper lower inclined wall is disposed between the lower lower arc portion and the upper lower inclined wall,
The lever fulcrum protrudes from a fulcrum member fitted between the upper side walls. In the seat slide device according to any one of claims 1 to 4,
The lock body is
A seat slide device comprising a sliding contact protrusion protruding toward the operation lever at a portion where the operation lever abuts. In the seat slide device according to any one of claims 1 to 5,
The lock body has a fitting protrusion that protrudes toward the lower rail at a portion along the swing surface,
The lower rail includes a plurality of comb-like slits into which the fitting protrusions can be fitted and removed as the lock grooves,
2. The seat slide device according to claim 1, wherein the slit has an arc shape along a rotation locus of the fitting protrusion. The seat slide device according to any one of claims 1 to 6,
The operating lever is a pipe-shaped member,
A seat slide device in which a portion to be inserted into the upper rail between the end portion of the upper rail and the lever fulcrum is crushed from the vertical direction.

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