JP6643708B2 - Seat slide device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a seat slide device for adjusting a vehicle seat back and forth.

  2. Description of the Related Art Conventionally, in a seat slide device for adjusting a vehicle seat back and forth, a configuration including a lock mechanism as disclosed in Patent Literature 1 below is known. The lock mechanism of such a vehicle seat slide device is configured such that a lock lever claw that is tiltably fixed to the upper rail is fitted into an engagement hole of the lower rail, an engagement hole of the upper rail, and the like. Is immovably locked to the lower rail. When the lock lever is tilted by operating the operation lever to pull out the pawl from the engagement hole of the lower rail and the engagement hole of the upper rail, the lock is released.

JP-A-2013-83425

  In the conventional seat slide device as described above, the lock member is controlled to rotate in a space formed between the upper rail and the lower rail by operating the operation handle. Then, the state changes between a lock state in which the lock claw is engaged with the engagement groove of the upper rail and the lower rail engagement groove, and a lock release state in which the engagement state is released. In such a configuration, the lock member must be displaced in a space formed between the upper rail and the lower rail, and the operation stroke (movement amount) of the operation handle for realizing the locked state and the unlocked state. ) Is difficult to secure. In a configuration in which the operation stroke is reduced, an unintended lock release may easily occur due to an erroneous operation of the operation handle. In this case, smooth sliding of the upper rail with respect to the lower rail is hindered.

  SUMMARY An advantage of some aspects of the invention is to provide a configuration in which an operation stroke of an operation member can be easily secured for a lock member that operates in a certain space.

In order to achieve the above object, according to the first aspect of the present invention, the lower rail member (30) fixed to the vehicle body and the lower rail member (30) are fixed to the seat (S) and slide with respect to the lower rail member. A lock side movably provided with an upper rail member (20), a lower rail side engaged portion (35a) of the lower rail member, and an upper rail side engaged portion (22b) of the upper rail member. An engagement part (51); and a support part (52) connected to one side of the lock-side engagement part via a connecting part and supporting the lock-side engagement part with respect to the upper rail member. A lock member (50), wherein the lock-side engaging portion is displaced between the lower rail member and the upper rail member by elastically deforming the support portion; and the lock-side engaging portion is the lower member. An operating member (70) that is operated to switch between a locked state in which the lock-side engaged portion and the upper rail-side engaged portion are engaged with each other and an unlocked state in which the locked state is released. The lock member has an extension (54) extending along the connecting portion from the one side of the lock-side engagement portion , and the extension is pressed by the operation member. Accordingly, the support portion is elastically deformed such that the lock-side engagement portion and the extension portion are integrally inclined with respect to the support portion.
Note that the reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

According to the first aspect of the present invention, the lower rail member includes a lower rail-side engaged portion, a lock-side engaging portion detachable from the upper rail-side engaged portion of the upper rail member, and one of the lock-side engaging portion. A supporting portion connected to the upper rail member via a connecting portion to support the lock side engaging portion with respect to the upper rail member, wherein the supporting portion is elastically deformed so that the lock side engaging portion is a lower rail member. And a lock member displaced between the upper rail member and the upper rail member. Further, the lock member has an extension extending from one side of the lock-side engagement along the connecting portion , and the extension is pressed by the operating member, so that the lock-side engagement and the extension are extended. The support portion is elastically deformed such that the protrusion is integrally inclined with respect to the support portion.

  With such a configuration, when the lock member is switched between the locked state and the unlocked state by the pressing of the lock member by the operating member, the lock-side engaging portion is supported by the connecting portion with the support portion as a fulcrum. An external force is applied so as to incline in the direction opposite to the direction in which the sloping direction is inclined. Therefore, compared to a configuration in which the lock-side engaging portion does not tilt with respect to the support portion, the amount of movement of the end opposite to one side of the lock-side engaging portion is reduced, and the distance between the lower rail member and the upper rail member is reduced. The operation stroke of the operation member in the lock release operation can be increased with respect to the lock member that is displaced in the space formed in the above. Therefore, unintended unlocking based on erroneous operation of the operation member can be prevented, unintentional sliding of the upper rail member with respect to the lower rail member is suppressed, and safety in use of the seat is ensured. be able to.

In the invention of claim 2, locking member, so as to sandwich the connecting portion has a pair of extending portions extending along the connecting portion from one side of the lock-side engagement portion. Accordingly, when the operation portion presses the extension portion to switch the lock member between the locked state and the unlocked state, an external force can be exerted on the support portion and the lock-side engagement portion in a well-balanced manner. Will be performed smoothly.

  According to the third aspect of the present invention, the lock member has a fitting portion that fits into the fitted portion formed on the upper rail member. The fitting portion is press-fitted into the fitted portion so as to be urged toward the fitted portion.

  As described above, since the fitting portion is pressed into the fitted portion so as to be urged toward the fitted portion, at least a part of the fitting portion surely comes into contact with the fitted portion. Therefore, even when friction occurs between the fitting portion and the fitted portion, and an external force is applied to the lock member and the upper rail member, even if such a fitting portion and the fitted portion are in contact with each other. Clearance is less likely to occur between them. Therefore, play is unlikely to occur between the lock member and the upper rail member, and the lock state of the lock side engaging portion to the lower rail side engaged portion and the upper rail side engaged portion is stably maintained. Can be. Thereby, it is possible to suppress occurrence of play in the sliding direction between the lower rail member and the upper rail member.

  According to the fourth aspect of the invention, at least one of the fitting portion and the fitted portion has a width in a direction orthogonal to the biasing direction narrowing toward the biasing direction of the fitting portion.

  As described above, since the width of at least one of the fitting portion and the fitted portion becomes narrower in the direction orthogonal to the biasing direction as the fitting portion is biased, the fitting portion is fitted with the fitting portion. It becomes easy to enter the joint. Then, since the fitting portion is pressed into the fitted portion so as to be urged toward the fitted portion, at least a part of the fitting portion surely contacts the fitted portion. Therefore, even when friction occurs between the fitting portion and the fitted portion, and an external force is applied to the lock member and the upper rail member, even if such a fitting portion and the fitted portion are in contact with each other. Clearance is less likely to occur between them. Therefore, play is less likely to occur between the lock member and the upper rail member, and the engagement state of the lock side engagement portion with the lower rail side engaged portion and the upper rail side engaged portion is stably maintained. be able to. Thereby, generation of backlash in the sliding direction between the lower rail member and the upper rail member can be further suppressed.

  According to the fifth aspect of the invention, the lock member has a support portion provided between the lock side engagement portion and the fitting portion to support the lock side engagement portion with respect to the upper rail member. I have. The fitting portion is urged toward the fitted portion by elastically deforming the support portion. Accordingly, it is not necessary to separately provide an elastic member or the like in the lock member in order to urge the fitting portion toward the fitted portion, so that it is possible to reduce the number of parts and realize cost reduction. it can.

  According to the sixth aspect of the invention, the lock member has a plurality of fitting portions respectively fitted to the plurality of fitted portions formed on the upper rail member. Accordingly, the lock member can be firmly fixed to the upper rail member, and rattling of the lock member with respect to the upper rail member can be further suppressed.

  In the invention according to claim 7, the lock member is configured to be elastically deformable so as to be switched between the locked state and the unlocked state with the fitting portion as a fulcrum. Accordingly, it is not necessary to provide an elastic member or the like for urging the lock member in order to realize a configuration in which the lock member is switched between the locked state and the unlocked state, and it is possible to reduce the number of parts and reduce cost. Can be realized.

  In the invention according to claim 8, the entirety of the lock member is integrally formed by a plate-shaped member. Thus, the lock member can be formed by simple processing, and cost reduction can be realized.

  According to the ninth aspect of the present invention, the lock member elastically deforms into at least one of the pair of fitting portions and at least one of the pair of support portions by receiving the external force, and a pair of the lock members receives no external force. An elastic portion that is displaced between a fitting position and a retracted position retracted from between the pair of support portions.

  With this, when the lock member is assembled to the upper rail member, the elastic portion is located at the retracted position without receiving external force, so that the pair of fitting portions is not restricted by the elastic portion and the pair of fitted portions is not restricted. Part can be fitted. On the other hand, after the lock member is assembled to the upper rail member, by applying an external force to the elastic portion, the movement of the fitting portion is restricted by the elastic portion, and the fitting portion engages with the fitted portion so as to separate from the fitted portion. The combined state is not released. In this way, when the lock member is assembled, the fitting portion can be fitted to the fitted portion without any trouble. Therefore, the locked state between the lock member and the upper rail member is not released. Then, after the lock member is assembled, by stably maintaining the engagement state of the lock side engagement portion, the upper rail member is prevented from unintentionally sliding with respect to the lower rail member, and the seat is Safety in use can be ensured.

  According to the tenth aspect, the elastic portion is located at the deformed position when receiving the pressing force from the operation member to be assembled, and is located at the retracted position when receiving no external force. Thus, by restricting the displacement of the elastic portion by the operating member which is a component of the seat slide device, the fitting state of the fitting portion and the fitted portion can be changed without separately providing a member that exerts an external force on the elastic portion. It is possible to realize a configuration for stably maintaining.

  According to the eleventh aspect, the pair of support portions are formed so as to extend from the lock-side engagement portion. The elastic portion is formed so as to extend from the lock-side engaging portion between the pair of supporting portions, and to retract from between the pair of supporting portions toward the pair of fitting portions. With this configuration, by arranging the operation member in parallel with the lock member, it is possible to press a portion of the elastic portion that is retracted from between the pair of support portions, and to control the pair of fitting portions by the elastic portion with a simple configuration. Can be realized.

It is a side view showing the composition outline of the vehicular seat in which the seat slide device concerning a 1st embodiment of the present invention is installed. FIG. 2 is a perspective view illustrating the seat slide device of FIG. 1. FIG. 2 is an exploded perspective view of the seat slide device of FIG. FIG. 3 is a perspective view illustrating an upper rail of FIG. 2. FIG. 5A is a bottom view of the upper rail of FIG. 4, and FIG. 5B is a side view thereof. FIG. 4 is a perspective view illustrating a lock member of FIG. 3. FIG. 7A is a plan view of the lock member of FIG. 6, FIG. 7B is a side view thereof, and FIG. 7C is a front view thereof. FIG. 2 is a perspective view showing the operation lever of FIG. 1. FIG. 9 is a bottom view of the operation lever of FIG. FIG. 10A is a perspective view showing a state before the lock member is assembled to the upper rail, and FIG. 10B is a perspective view showing a state where the lock member is sandwiched between the upper rails. (C) is a perspective view showing a state where the lock member is assembled to the upper rail. FIGS. 11A to 11C are bottom views each showing a part of the configuration shown in FIGS. 10A to 10C. FIGS. 12A to 12C are enlarged views showing a part of the configuration shown in FIGS. 11A to 11C, respectively. FIGS. 13A to 13C are side views showing a part of the configuration shown in FIGS. 10A to 10C, respectively. 14A is a cross-sectional view showing a cross section taken along line A1-A1 of FIG. 11A, FIG. 14B is a cross-sectional view showing a cross section taken along line B1-B1 of FIG. (C) is a sectional view showing a C1-C1 section of FIG. 11 (C), and FIG. 14 (D) is a sectional view showing a C2-C2 section of FIG. 11 (C). It is a perspective view showing the state where the operation lever was attached to the upper rail and the lock member. It is a bottom view which shows a part of structure of FIG. 17A is a cross-sectional view showing a D1-D1 cross section of FIG. 16, FIG. 17B is a cross-sectional view showing a D2-D2 cross section of FIG. 16, and FIG. It is sectional drawing which shows the D3-D3 cross section of No. 16. FIG. 18A is a cross-sectional view illustrating a locked state of the seat slide device of FIG. 1, and FIG. 18B is a cross-sectional view illustrating an unlocked state in which the locked state is released. 18C is a cross-sectional view illustrating a state in which the operation lever is further operated in the direction in which the locked state is released from the state illustrated in FIG. 18B. FIGS. 19A to 19C are enlarged views showing a part of the configuration shown in FIGS. 18A to 18C, respectively. It is a perspective view showing a lock member concerning other embodiments of the present invention. FIG. 21 (A) is a plan view of the lock member of FIG. 20, FIG. 21 (B) is a side view thereof, and FIG. 21 (C) is a front view thereof. It is a top view showing a part of a lock member and an upper rail which constitute a seat slide device concerning other embodiments of the present invention. It is a perspective view showing a lock member which constitutes a seat slide device concerning other embodiments of the present invention. FIG. 24 (A) is a plan view of the lock member of FIG. 23, FIG. 24 (B) is a side view thereof, and FIG. 24 (C) is a front view thereof.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the seat slide device 10 fixes a vehicle seat S to a vehicle floor B so as to be slidable back and forth, and mainly includes an upper rail 20 fixed to the vehicle seat S. A lower rail 30 fixed to the vehicle body (vehicle floor B) via the front and rear feet 31, and a lock member 50 capable of fixing (locking) the upper rail 20 and the lower rail 30 so that they cannot move relative to each other. Only one of the lock members 50 is described in FIGS. 1 to 3), and an operation is performed to switch between a lock state of the upper rail 20 and the lower rail 30 by the pair of lock members 50 and an unlock state of releasing the lock state. And a lever 70. Hereinafter, each component of the seat slide device 10 will be described in detail.

  The upper rail (upper rail member) 20 is provided slidably with respect to the lower rail 30. As shown in FIGS. 4 and 5, the upper rail 20 is substantially horizontal to the vehicle floor B, and has an upper wall 21 to which the vehicle seat S is attached via a not-shown bracket or the like. The lower rail 30 includes a side wall 22 that is suspended from both ends of the side wall 21, a connecting portion 23 that is bent upward and bent from the lower end of each side wall 22, and a steel ball (not shown) held by a retainer (not shown). And an inclined portion 24 to be held in a space between the two.

As shown in FIGS. 4 and 5, one of the side walls 22 and the connecting portion 23 connected to the side wall 22 have a slot-shaped notch 22 a into which a part of the lock member 50 can enter. Are formed. Further, at a part of the notch 22a on the side wall 22 side, there are provided three lock claws 22b which can be disengaged from a lock piece 51 (described later) of the lock member 50, respectively. At one end of the upper rail 20, cutouts 22c and 22d are formed in one of the side walls 22 and the connecting portion 23, into which protruding portions 52b and 52c of the lock member 50 described later are fitted. ing. A protruding piece 22e is formed on the upper wall 21 side of the notch 22c so as to protrude on the opposite side to the upper wall 21 side, and on the opposite side of the notch 22d from the upper wall 21 side and on the other side wall 22 side. A protruding piece 22f is formed to protrude.
In addition, the lock claw 22b may correspond to an example of an “upper rail side engaged portion”, and the notches 22c and 22d may correspond to an example of a “fitted portion”.

  As shown in FIG. 3, the lower rail (lower rail member) 30 is substantially horizontal to the vehicle floor B, faces the upper wall 21 of the upper rail 20, and is fixed to the vehicle floor B via the front and rear feet 31. A first side portion 33 extending upward from both ends of the bottom wall 32, a flange portion 34 provided substantially parallel to the bottom wall 32 from the upper end of each first side portion 33 toward the center, and A second side 35 extends substantially parallel to the first side 33 from the terminal toward the bottom wall 32.

As shown in FIG. 3, the second side portion 35 corresponding to each lock claw 22b of the side wall 22 is provided with five or more lock claws 35a formed similarly to the lock claw 22b.
Note that the lock claw 35a may correspond to an example of a “lower rail side engaged portion”.

  The upper rail 20 is disposed such that its upper wall 21 faces the bottom wall 32 of the lower rail 30 and the inclined portion 24 of the upper rail 20 enters the space between the first side 33 and the second side 35 of the lower rail 30. Have been. Although not shown, for example, between a corner portion between the first side portion 33 and the flange portion 34 of the lower rail 30 and between the inclined portion 24 of the upper rail 20 and the bottom wall 32 of the lower rail 30 and the first side. A steel ball (not shown) held by a retainer (not shown) is arranged between the corner portion between the portion 33 and the connecting portion 23 of the upper rail. Thus, the steel balls held by the retainer allow the upper rail 20 and the lower rail 30 to slide smoothly in the vehicle longitudinal direction.

  Next, the lock member 50 will be described in detail. As shown in FIGS. 6 and 7, the lock member 50 is formed in a substantially elongated plate shape, and a lock piece 51 that forms a locked state between the upper rail 20 and the lower rail 30, and a lock piece that fits into the upper rail 20. The lock member 51 includes a pair of support portions 52, 52 that indirectly support the 51, and a connection portion 53 that connects the lock piece 51 and the support portion 52. Further, the lock member 50 is formed integrally with the lock piece 51 and receives a pressing force from the operation lever 70, and is formed and supported between the pair of support portions 52, 52. And a restricting portion 55 for restricting deformation of the portion 52. Further, the lock member 50 has a configuration in which the whole is integrally formed by a plate-shaped member. Hereinafter, each element constituting the lock member 50 will be described in detail.

As shown in FIGS. 6 and 7, the lock piece 51 is formed in a substantially rectangular plate shape with rounded corners on one end side of the lock member 50. In the vicinity of four corners on the plate surface of the lock piece 51, four lock holes 51a penetrating in a substantially square shape in the plate thickness direction are formed. Further, a through hole 51b is formed in a central portion on the plate surface of the lock piece 51 so as to penetrate in a substantially rectangular shape in the plate thickness direction. Further, the lock piece 51 is formed with a protruding piece 51c that rises in the thickness direction from a wall part that forms the through hole 51b.
In addition, the lock piece 51 may correspond to an example of a “lock side engagement portion”.

As shown in FIGS. 6 and 7, each of the pair of support portions 52 is formed in a long plate shape, and one end is connected to the connection portion 53. On the other end of the support portion 52, a fixing portion 52a fixed to the upper rail 20 is formed. The fixing portion 52a is formed in a substantially rectangular plate shape that is slightly inclined with respect to the longitudinal direction of the support portion 52, and includes protruding portions 52b and 52c that enter the notches 22c and 22d of the upper rail 20, respectively. The protruding portion 52b is located at one end of the lock member 50, and is formed in a substantially rectangular plate shape so as to protrude in a direction orthogonal to the longitudinal direction of the support portion 52, on the side opposite to the other fixing portion 52a. Further, the protruding portion 52c is substantially trapezoidal at a position on the support portion 52 side separated from the protruding portion 52b so as to protrude on the opposite side to the other fixed portion 52a in a direction orthogonal to the longitudinal direction of the support portion 52. It is formed in a shape. Further, as shown in FIG. 7A, a side portion 52d of the projecting portion 52b facing the projecting portion 52c is inclined at an angle of θ1 (for example, 7 °) with respect to a direction orthogonal to the longitudinal direction of the fixing portion 52a. It has a tapered shape. Further, a side portion 52e of the protruding portion 52c facing the protruding portion 52b is tapered so as to be inclined at an angle of θ2 (for example, 7 °) with respect to a direction orthogonal to the longitudinal direction of the fixing portion 52a. As a result, the protruding portions 52b and 52c have a shape that becomes narrower toward the outside.
Note that the protruding portions 52b and 52c may correspond to an example of a “fitting portion”.

  As shown in FIGS. 6 and 7, the connecting portion 53 is formed in a long plate shape, and is connected to a central portion on one side of the lock piece 51 and the pair of support portions 52, 52. The pair of extending portions 54 are formed so as to extend along the connecting portion 53 from a position adjacent to the connecting position of the connecting portion 53 on one side of the lock piece 51, and each sandwich the connecting portion 53. So as to be parallel to the connecting portion 53.

  As shown in FIGS. 6 and 7, the pair of extending portions 54, 54 are formed to extend from adjacent positions sandwiching the connecting portion of the connecting portion 53 in the lock piece 51. Further, the extending portion 54 is formed in a long plate shape having the same thickness as the connecting portion 53, and the extending length is slightly longer than half of the length of the connecting portion 53. Further, the extending portion 54 is configured to extend along the longitudinal direction of the connecting portion 53, and the pair of extending portions 54, 54 and the connecting portion 53 are spaced apart from each other by a predetermined distance (the width of the connecting portion 53 in the short direction). Are arranged in parallel at intervals of about half of

As shown in FIGS. 6 and 7, the restricting portion 55 is connected to one end of the connecting portion 53 together with the pair of supporting portions 52, 52 and is formed in a long plate shape. That is, a portion formed by the regulating portion 55, the connecting portion 53, and the pair of supporting portions 52, 52 has a fork shape. The restricting portion 55 includes a flat plate portion 55a connected to one end of the connecting portion 53 and extending parallel to the pair of support portions 52, 52, and a bent plate portion 55b connected to the flat plate portion 55a. The flat plate portion 55 a is formed so as to be inclined with respect to the longitudinal direction of the pair of support portions 52, 52, and is separated from the pair of support portions 52, 52 as the distance from the connection portion 53 increases. As shown in FIG. 7B, the bent plate portion 55b has a shape that is bent in a substantially inverted U-shape, and is located away from the space between the pair of support portions 52.
Note that the restricting portion 55 may correspond to an example of an “elastic portion”.

  As shown in FIGS. 8 and 9, the operation lever (operation member) 70 has a grip 71 disposed outside the upper rail 20, and extends substantially linearly in parallel from both ends of the grip 71. It has a connecting portion 72 that projects and an operating portion 73 that is connected to both connecting portions 72 and that is disposed between the upper rail 20 and the lock member 50. The operating portion 73 is formed in a substantially long plate shape, and convex portions 73a, 73a protruding to one side of the plate surface are formed at the distal end portion of the operating portion 73 along the extending direction of the operating portion 73. It is formed so as to have a shape. Further, a pair of convex portions 73b, 73b protruding to one side of the plate surface so as to be continuous with the pair of convex portions 73a, 73a of the operation portion 73, respectively, are elongated along the extending direction of the operation portion 73. Is formed. A notch 73c is formed near the end of the pair of convex portions 73b, 73b of the operation portion 73 on the connecting portion 72 side so as to penetrate in the plate thickness direction. On the side opposite to the side on which the projections 73a and the like of the operation section 73 are formed, projections 73d and 73e projecting in the thickness direction of the operation section 73 are formed.

Next, assembling of the lock member 50 to the upper rail 20 will be described.
FIGS. 10 (A), 11 (A), 12 (A), 13 (A), and 14 (A) show a state before the lock member 50 is assembled to the upper rail 20. FIG. No external force is applied to the support portion 52 of the lock member 50, and as shown in FIGS. 10A and 11A, the pair of support portions 52 are separated from each other in a natural state. Further, in the pair of fixed portions 52a, 52a in the separated state, the distance between the tips of the respective protruding portions 52b, 52b is larger than the distance between the pair of notches 22c, 22c. Similarly, the distance between the tips of the protruding portions 52c, 52c of the pair of fixing portions 52a, 52a is larger than the distance between the pair of notches 22d, 22d. Thereby, when the pair of support portions 52 are separated from each other in a natural state without an external force being applied to the support portions 52 of the lock member 50, as shown in FIGS. 12A and 14A. The projections 52b and 52c do not fit into the notches 22c and 22d, respectively. Further, as shown in FIGS. 10A and 13A, the restricting portion 55 is in a state of being retracted from between the pair of supporting portions 52, 52.

  FIGS. 10 (B), 11 (B), 12 (B), 13 (B), and 14 (B) show a state where the lock member 50 is sandwiched between the upper rails 20. FIG. Since the restricting portion 55 is in a state of being retracted from between the pair of support portions 52, 52, for example, the pair of support portions 52 of the lock member 50 are sandwiched and pressed from the outside, so that the pair of support portions 52 It is elastically deformed toward the other support portion 52. Then, as shown in FIGS. 12 (B) and 14 (B), the pair of support portions 52 are elastically deformed to such an extent that the pair of fixing portions 52a, 52a come into contact, so that the respective projecting portions 52b, 52b are formed. It can be arranged so as to fit between a pair of notches 22c, 22c. Similarly, as shown in FIG. 12 (B) and FIG. 14 (B), the protrusions 52c, 52c can be arranged so as to fit between the pair of notches 22d, 22d. Then, as shown in FIGS. 10 (B), 13 (B), and 14 (B), in the short direction of the upper rail 20, a pair of projecting portions 52b, 52b are formed by a pair of notches 22c, 22c, respectively. The lock member 50 is brought closer to the upper rail 20 so that the pair of protrusions 52c, 52c face each of the pair of notches 22d, 22d. Further, as shown in FIGS. 10 (B) and 13 (B), the side walls of the lock pieces 51 are inserted into a pair of notches 22a, 22a formed in the upper rail 20, and each lock claw 22b is locked. 51 is engaged with each lock hole 51a.

  FIGS. 10 (C), 11 (C), 12 (C), 13 (C), and 14 (C) show a state where the lock member 50 is assembled to the upper rail 20. For example, when the pair of support portions 52, 52 of the lock member 50 are sandwiched and pressed from the outside to be in the state shown in FIG. 10B, the pressed state of the support portion 52 is released, so that the elastic deformation thereof is achieved. Is released. Then, the pair of protrusions 52b, 52b are press-fitted into the notches 22c, 22c so as to be urged toward the pair of notches 22c, 22c, respectively. Similarly, the pair of projections 52c, 52c are press-fitted into the notches 22d, 22d so as to be urged toward the pair of notches 22d, 22d, respectively. Specifically, as shown in FIG. 13 (B), the protruding portion 52b enters between the side wall 22 and the connecting portion 23 from the notch 22c, and is sandwiched between the protruding piece 22e and the connecting portion 23. Become. Further, as shown in FIG. 13B, the protruding portion 52c enters between the side wall 22 and the connecting portion 23 from the notch 22d, and comes into contact with the side surface of the protruding piece 22f. At this time, as shown in FIGS. 13 (C) and 14 (D), the restricting portion 55 is in a state of being retracted from between the pair of supporting portions 52, 52.

  In addition, since the protruding portions 52b and 52c of the lock member 50 have a shape that becomes narrower toward the outside (the width in a direction orthogonal to the urging direction becomes closer to the urging direction of the protruding portions 52b and 52c). Therefore, as shown in FIG. 12 (C), the holes enter the notches 22c and 22d, respectively. The side portion 52d (the portion inclined at θ1) of the protruding portion 52b contacts the side edge 22h of the notch 22c, and the side portion 52f of the protruding portion 52b contacts the side edge 22g of the notch 22c. Also, a side portion 52e (a portion inclined at θ2) of the protruding portion 52c contacts the side edge 22i of the notch 22d. As described above, the protrusions 52b and 52c of the lock member 50 surely come into contact with the notches 22c and 22d of the upper rail 20, and friction occurs between the protrusions 52b and 52c and the notches 22c and 22d. Thus, even when an external force is applied to the lock member 50 or the upper rail 20, a clearance hardly occurs between the protrusions 52b, 52c and the notches 22c, 22d. Therefore, play is unlikely to occur between the lock member 50 and the upper rail 20, and the locked state by the lock member can be stably maintained.

Next, assembling of the operation lever 70 to the upper rail 20 and the lock member 50 will be described.
In a state where the lock member 50 is assembled to the upper rail 20 as shown in FIG. 10C, the operation part 73 of the operation lever 70 is inserted between the upper rail 20 and the lock member 50 so that the operation lever 70 is Assemble. At this time, substantially the entire operation section 73 enters between the upper rail 20 and the lock member 50. Also, as shown in FIGS. 16 and 17A, the tip of the operation portion 73 is located near the protruding piece 51c of the lock member 50, and the vicinity of the end of the projection 73b on the side of the projection 73a is an extension. 54.

  In addition, as shown in FIG. 17A, the restricting portion 55 of the lock member 50 enters a notch 73c of the operation lever 70. At this time, when the regulating portion 55 comes into contact with the opening 73f of the notch 73c, the regulating portion 55 receives a pressing force and is elastically deformed toward the lower rail 30. In this way, the restricting portion 55 is moved from the retracted position retracted from between the pair of fixing portions 52a and between the pair of supporting portions 52, 52 to the pair of supporting portions as shown in FIGS. It will be displaced between a deformed position where it is elastically deformed and enters between 52 and 52. That is, the restricting portion 55 is located at the deformed position when receiving the pressing force from the operation lever 70 to be assembled, and is located at the retracted position when receiving no external force.

  As described above, when assembling the lock member 50, the protrusions 52b and 52c can be fitted into the notches 22c and 22d without any trouble. After the assembling of the lock member 50, a load is applied to the lock member 50. In such a case, the fitting state between the lock member 50 and the upper rail 20 is not unintentionally released. After the lock member 50 is assembled, the engagement state of the lock pieces 51 is stably maintained, so that the upper rail 20 is prevented from unintentionally sliding with respect to the lower rail 30, and Safety in use of the project can be ensured.

  Also, as shown in FIG. 17A, the projections 73d and 73e of the operation lever 70 are in contact with the projections 21a and 21b formed on the upper wall 21 of the upper rail 20, respectively.

Next, the switching operation between the locked state and the unlocked state by the operation lever 70 in the seat slide device 10 will be described.
When the operation lever 70 is not operated, as shown in FIG. 18A, the operation lever 70 and the lock member maintain a fixed posture. Specifically, the protrusions 73d and 73e of the operation lever 70 abut on the protrusions 21a and 21b of the upper rail 20, respectively, and the opening 73f of the notch 73c abuts on the regulating portion 55 of the lock member 50. 70 and the lock member are stationary. Further, the operation lever 70 does not press the extending portion 54 of the lock member 50, the support portion 52 and the like do not elastically deform, and the lock piece 51 does not displace. Then, as shown in FIG. 19A, the lock piece 51 remains engaged with the lock claw 22b of the upper rail 20 and the lock claw 35a of the lower rail 30. That is, the lock claw 22b and the lock claw 35a are fitted into the lock hole 51a of the lock member 50. As a result, the upper rail 20 and the lower rail 30 are locked so that they cannot move relative to each other.

  In the locked state by the lock member 50, when the grip portion 71 of the operation lever 70 is operated to move upward, as shown in FIG. 18B, the operation portion 73 of the operation lever 70 The tip side tilts downward. Specifically, the operation portion 73 is moved downward with the protrusion 73e of the operation lever 70 supported by the protrusion 21b of the upper rail 20 and the opening 73f of the notch 73c supported by the restriction portion 55 of the lock member 50. Will be tilted. The projecting portion 73b of the operating portion 73 that tilts in this way (specifically, the end of the projecting portion 73b on the projecting portion 73a side) presses the extending portion 54 of the lock member 50 downward, so that the supporting portion 52 is elastically deformed so that the lock piece 51 side goes downward via the lock piece 51. Further, the elastic deformation of the support portion 52 causes the lock piece 51 to move downward as shown in FIG. 19B, and the lock piece 51 and the lock claw 22b of the upper rail 20, Then, the engagement of the lower rail 30 with the lock claw 35a is released, and the upper rail 20 and the lower rail 30 enter an unlocked state in which the relative movement is possible.

  At this time, when the extension portion 54 is pressed by the operation lever 70, the lock piece 51 and the extension portion 54 are integrally inclined with respect to the support portion 52. That is, the lock piece 51 is tilted in the direction opposite to the direction in which the support part 52 is tilted with the connection part with the support part 52 as a fulcrum (the upward moment about the lock piece 51 with the connection part with the support part 52 as an axis). External force is applied). Then, the lock piece 51 moves downward while keeping the plate surface parallel to the upper wall 21 of the upper rail 20. Therefore, as compared with the configuration in which the lock piece 51 does not tilt with respect to the support portion 52, the amount of movement of the end opposite to one side (the support portion 52 side) of the lock piece 51 becomes smaller, and the lower rail 30 and the upper rail 20 are moved. The operation stroke of the operation lever 70 in the lock release operation can be increased with respect to the lock member 50 displaced in the space formed between the operation lever 70 and the lock member 50.

  In such a locked state, when the grip portion 71 of the operation lever 70 is further operated so as to move upward, as shown in FIG. 18C, the operation portion 73 of the operation lever 70 has a further distal end side. Tilt down. When the extending portion 54 of the lock member 50 is further pressed by the convex portion 73b of the operation portion 73 (specifically, the end of the convex portion 73b on the convex portion 73a side), the support portion 52 becomes more elastic. It will be deformed. Further, when the extension portion 54 is pressed by the operation lever 70, the lock piece 51 and the extension portion 54 are configured to be integrally inclined with respect to the support portion 52. The surface moves downward while keeping the surface parallel to the upper wall 21 of the upper rail 20. When a part of the connecting portion 72 of the operating lever 70 comes into contact with the projection 21 c formed on the upper wall 21 of the upper rail 20, further operation of the operating lever 70 is restricted, and the tilting of the lock member 50 is performed. Stops.

  Then, when the grip portion 71 of the operation lever 70 is released after adjusting the relative position between the upper rail 20 and the lower rail 30, the elastic deformation of the support portion 52 returns to its original state, and the lock piece 51 moves upward. Then, the lock piece 51, the lock claw 22b of the upper rail 20, and the lock claw 35a of the lower rail 30 are engaged, and the upper rail 20 and the lower rail 30 are again in a locked state in which relative movement is impossible (FIG. 18 ( A), FIG. 19 (A)).

  As described above, in the seat slide device 10 according to the first embodiment, the lock member 50 is displaced between the lower rail 30 and the upper rail 20 by the elastic deformation of the support portion 52. The lock member 50 further has an extension 54 extending from one side of the lock piece 51 along the support portion 52, and when the extension 54 is pressed by the operation lever 70, the lock piece 51 is pressed. The support portion 52 is elastically deformed such that the extension portion 54 is integrally inclined with respect to the support portion 52.

  Thus, when the lock member 50 is switched between the locked state and the unlocked state by the pressing of the lock member 50 by the operation lever 70, the lock piece 51 is supported by the support portion 52 using the connection portion with the support portion 52 as a fulcrum. The external force is applied so as to incline in the direction opposite to the direction in which. Therefore, compared to a configuration in which the lock piece 51 does not tilt with respect to the support portion 52, the amount of movement of the end opposite to one side of the lock piece 51 is smaller, and the lock piece 51 is formed between the lower rail 30 and the upper rail 20. The operation stroke of the operation lever 70 in the lock release operation can be increased with respect to the lock member 50 displaced in the space. Therefore, it is possible to prevent unintentional unlocking based on an erroneous operation of the operation lever 70, to suppress unintentional sliding of the upper rail 20 with respect to the lower rail 30, and to improve safety in use of the seat S. Can be secured.

  Further, the lock member 50 has a pair of extending portions 54 extending along the support portion 52 from one side of the lock piece 51 so as to sandwich the support portion 52. Thereby, when the extension member 54 is pressed by the operation lever 70 to switch the lock member 50 between the locked state and the unlocked state, an external force can be applied to the support part 52 and the lock piece 51 in a well-balanced manner. The operation of the lock member 50 is performed smoothly.

  Further, the lock member 50 is configured to have protruding portions 52b, 52c that fit into the notches 22c, 22d formed in the upper rail 20, respectively. The protruding portions 52b, 52c are press-fitted into the notches 22c, 22d so as to be urged toward the notches 22c, 22d.

  As described above, since the protrusions 52b, 52c are press-fitted into the notches 22c, 22d so as to be urged toward the notches 22c, 22d, at least a part of the protrusions 52b, 52c is notch 22c, 22d. And the friction between the projections 52b, 52c and the notches 22c, 22d is generated, so that even if an external force is applied to the lock member 50 or the upper rail 20, such a case is obtained. Clearance is unlikely to occur between the protruding portions 52b, 52c and the notches 22c, 22d. Therefore, play is unlikely to occur between the lock member 50 and the upper rail 20, and the engagement state of the lock piece 51 with the lock claw 22 of the upper rail 20 and the lock rail 35 of the lower rail 30 is stably maintained. Can be. Thereby, it is possible to suppress the occurrence of play in the sliding direction between the lower rail 30 and the upper rail 20.

  Further, the protruding portions 52b, 52c are press-fitted into the notches 22c, 22d so as to be urged toward the notches 22c, 22d, and the protruding portions 52b, 52c are orthogonal to the urging direction as going toward the urging direction. The width in the direction to perform is narrow.

  As described above, since the width of the protruding portions 52b and 52c in the direction orthogonal to the urging direction becomes narrower toward the urging direction, the protruding portions 52b and 52c easily enter the notches 22c and 22d. Then, since the projections 52b, 52c are press-fitted into the notches 22c, 22d so as to be urged toward the notches 22c, 22d, at least a part of the projections 52b, 52c is notched 22c, 22d. And the friction between the projections 52b, 52c and the notches 22c, 22d is generated, so that even if an external force is applied to the lock member 50 or the upper rail 20, such a case is obtained. Clearance between the protruding portions 52b, 52c and the notches 22c, 22d is less likely to occur. Therefore, play is less likely to occur between the lock member 50 and the upper rail 20, and the engagement state of the lock pieces 51 with the lock claws 22 of the upper rail 20 and the lock rails 35a of the lower rail 30 is more stably maintained. be able to. Thereby, generation of play in the sliding direction between the lower rail 30 and the upper rail 20 can be further suppressed.

  Further, the lock member 50 is configured to have, at a position away from the lock piece 51, protrusions 52 b and 52 c that fit into the notches 22 c and 22 d of the upper rail 20, respectively. Therefore, the number of components can be reduced and the cost can be reduced as compared with a configuration in which the lock member 50 is fixed to the upper rail 20 by caulking or screwing.

  Further, the lock member 50 has a support portion 52 provided so as to be interposed between the lock piece 51 and the protruding portions 52b and 52c and supporting the lock piece 51 with respect to the upper rail 20. The protruding portions 52b and 52c are urged toward the notches 22c and 22d by the elastic deformation of the support portion 52. Accordingly, it is not necessary to separately provide an elastic member or the like in the lock member 50 in order to urge the fitting portion toward the notches 22c and 22d, so that the number of components can be reduced, and cost reduction can be realized. be able to. Further, by pressing the pair of support portions 52, 52 so as to bring the respective pair of support portions 52, 52 closer to each other, the urging force is generated in the protruding portions 52b, 52c, and between the pair of side walls 22, 22. It can be easily changed to a state where it can enter.

  Further, the lock member 50 has protrusions 52b, 52c that fit into the notches 22c, 22d formed in the side wall 22 of the upper rail 20. Accordingly, the lock member 50 can be firmly fixed to the upper rail 20 by providing a plurality of protruding portions that are fitted to the side walls 22 of the upper rail 20, and the lock member 50 to the upper rail 20 is loosely attached to the upper rail 20. Can be further suppressed.

  Further, the lock member 50 is configured to be elastically deformable so as to be switched between a locked state and an unlocked state with the fixing portion 52a (that is, the protruding portions 52b and 52c) as a fulcrum. Accordingly, in order to realize a configuration in which the lock member 50 is switched between the locked state and the unlocked state, there is no need to provide an elastic member or the like for urging the lock member 50, so that the number of components can be reduced, and Cost reduction can be realized.

  Further, the entirety of the lock member 50 is integrally formed by a plate-shaped member. Thereby, the lock member 50 can be formed by simple processing, and cost reduction can be realized.

  Further, the locking member 50 is displaced elastically between the pair of support portions 52, 52, and a restricting portion 55 that is displaced between a deformed position and a retracted position retracted from between the pair of support portions 52, 52. Having.

  Thus, when the lock member 50 is assembled to the upper rail 20, the restricting portion 55 is located at the retracted position without receiving any external force, so that the protruding portions 52b and 52c are not restricted by the restricting portion 55 from moving. It is possible to displace so as to enter between the side walls 22. On the other hand, after assembling the lock member 50 to the upper rail 20, by applying an external force to the regulating portion 55, the protrusions 52 b, 52 c are restricted in movement by the regulating portion 55, and the notches 22 c, The engagement state with 22d is not released. As described above, when assembling the lock member 50, the protrusions 52b and 52c can be fitted into the notches 22c and 22d without any trouble. After the assembling of the lock member 50, a load is applied to the lock member 50. In such a case, the fitting state between the lock member 50 and the upper rail 20 is not unintentionally released. After the lock member 50 is assembled, the engagement state of the lock pieces 51 is stably maintained, so that the upper rail 20 is prevented from unintentionally sliding with respect to the lower rail 30, and the seat S Safety in use can be ensured.

  Further, since the movement of the protruding portions 52b and 52c is regulated using the regulating portion 55 formed on the lock member 50, there is no need to separately provide a regulating member for regulating the movement of the protruding portions 52b and 52c. The process of assembling the lock member 50 is simplified, the number of parts can be reduced, and the cost can be reduced.

  Further, the restricting portion 55 is located at the deformed position when receiving the pressing force from the operation lever 70 attached thereto, and is located at the retracted position when receiving no external force. Thus, by restricting the displacement of the regulating portion 55 by the operation lever 70 which is a component of the seat slide device 10, the protrusions 52b, 52c and the notch 22c can be provided without separately providing a member for exerting an external force on the regulating portion 55. , 22d can be stably maintained.

  Further, the support portion 52 is formed so as to extend from the lock piece 51. The restricting portion 55 is formed so as to extend from the lock piece 51 between the pair of supporting portions 52, 52 and to retract from the pair of supporting portions 52, 52 toward the projecting portions 52b, 52c. I have. Thus, by arranging the operation lever 70 in parallel with the lock member 50, a portion of the regulating portion 55 which is retracted from between the pair of supporting portions 52, 52 can be pressed, and the projection by the regulating portion 55 can be performed with a simple configuration. The restricted state of the parts 52b and 52c can be realized.

Note that the present invention is not limited to the above embodiments, and may be embodied as follows. Even in such a case, the same operation and effect as those of the above embodiments can be obtained.
(1) Instead of the lock member 50, a configuration using a lock member 150 as shown in FIGS. That is, similarly to the lock member 50, the lock member 150 includes the support portion 52, the connection portion 53, and the restriction portion 55. The fixing portion 152a has protrusions 52b and 52c, like the fixing portion 52a. Further, the lock member 150 includes a lock piece 151 having a plate shape substantially similar to the lock piece 51, and an extension plate portion 156 extending from a side of the lock piece 151 opposite to a side connected to the connecting portion 53. Have. The extension plate portion 156 is formed in a substantially rectangular plate shape, and has a protruding piece 156a that rises so as to be curved in the thickness direction from the side opposite to the side connected to the lock piece 151.

  When the operation lever 70 presses the extension plate portion 156 against such a lock member 150, the state can be changed between the locked state and the unlocked state. In addition, when the operation lever 70 presses the extension plate portion 156, the entire lock member 150 bends, and the lock member 151 is pressed against the fixed portion 152a side rather than the lock piece 151. Is to increase the operation stroke of the operation lever 70 in the lock release operation with respect to the lock member 150 that is displaced in the space formed between the lower rail 30 and the upper rail 20 because the amount of movement of the opposite end is reduced. Can be.

(2) Not only the configuration in which the width in the direction orthogonal to the urging direction becomes narrower as the protruding portion 52b of the lock member 50 moves toward the urging direction, the notch of the upper rail 20 as shown in FIG. A configuration in which the width in the direction orthogonal to the urging direction becomes narrower as 22c moves toward the urging direction of the protruding portion 52b may be employed. Specifically, the side edge of the notch 22c may be formed so as to be inclined at angles of θ3 and θ4 (eg, 7 °) with respect to the direction in which the pair of side walls 22 and 22 face each other. Further, as shown in FIG. 22B, the width of the protruding portion 52b and the notch 22c in the direction orthogonal to the urging direction may become narrower as the protruding portion 52b moves toward the urging direction. Specifically, the side wall of the projecting portion 52b of the lock member 50 may be formed so as to be inclined at an angle of θ5 (for example, 7 °) with respect to the direction in which the pair of side walls 22 and 22 face each other. . Similarly, as shown in FIGS. 22A and 22B, the protruding portion 52c and the notch 22d move in the direction perpendicular to the urging direction as the protruding portion 52c moves in the urging direction of the protruding portion 52c. The width may be narrowed.

(3) The lock member is not limited to the example constituted by the plate-shaped member, and may be constituted by an elastically deformable rod-shaped member as shown in FIGS. In the lock member 250 shown in FIGS. 23 and 24, a lock piece 251, a support portion 252, protruding portions 252b and 252c, a regulating portion 255, and the like are formed by bending a continuous rod-shaped elastic member. The lock piece 251, the support portion 252, the protruding portions 252b, 252c, and the restricting portion 255 function similarly to the lock piece 51, the support portion 52, the protruding portions 52b, 52c, and the restricting portion 55 of the first embodiment. The lock engagement portion 251a formed in a substantially U-shape functions similarly to the lock hole 51a. Further, as shown in FIG. 24A, the side portions 252d and 252e of the protruding portions 252b and 252c are in the direction in which the protruding portions 252b and 252c are urged (the direction toward the notches 22c and 22d). And inclined at angles of θ11 and θ12 (for example, 7 °). And the side part 252d, 252e will function similarly to the side part 52d, 52e.

(4) The side portions 52d and 52e of the protruding portions 52b and 52c of the lock member 50 are tapered so as to be inclined at an angle other than 7 ° with respect to a direction orthogonal to the longitudinal direction of the fixing portion 52a. You may.

(5) The restricting portion 55 of the lock member 50 is not limited to a configuration in which the restricting portion 55 is elastically deformed between the pair of supporting portions 52, 52 to restrict the movement of the entering protruding portions 52b, 52c. A configuration may also be adopted in which the movement between the entry protrusions 52b, 52c is restricted by being elastically deformed between the spaces 52a, 52a (the pair of protrusions 52b, 52b and the pair of protrusions 52c, 52c). Further, the restricting portion 55 is elastically deformed between the pair of supporting portions 52, 52 and between the pair of fixing portions 52a, 52a (the pair of projecting portions 52b, 52b and the pair of projecting portions 52c, 52c). A configuration may be adopted in which the movement of the protruding portions 52b and 52c is restricted.

(6) The notches 22c and 22d of the upper rail 20 are not limited to the configuration formed on the side wall 22 and the connecting portion 23, but may be formed on the upper wall 21 or formed on the upper wall 21 and the side wall 22. May be used. For example, even if the upper rail 20 has an upper wall formed in a semi-cylindrical shape protruding outward instead of the upper wall 21, notches 22 c and 22 d are formed in the upper wall. Good.

(7) The lock hole 51a of the lock member 50 and the lock claw 22b of the upper rail 20 are not limited to being provided in two pairs, but may be provided in one or four or more pairs. Good.

(8) If the lock piece 51 of the lock member 50 is configured to engage with the lock claw 22b of the upper rail 20 and the lock claw 35a of the lower rail 30, the lock piece 51 has a claw-shaped portion other than the lock hole 51a. It may be.

10: Seat slide device 20: Upper rail (upper rail member)
22b: Lock claw (upper rail side engaged portion)
22c, 22d ... Notch (part to be fitted)
30: Lower rail (lower rail member) 35a: Lock claw (lower rail side engaged portion)
50, 250: Lock member 51, 251: Lock piece (lock side engaging portion)
52, 252: Supporting portions 52b, 52c, 252b, 252c: Projecting portions (fitting portions)
54, 254 ... extension part 55, 255 ... regulating part (elastic part)
70 ... Operation lever (operation member)

Claims (11)

A lower rail member fixed to the vehicle body,
An upper rail member fixed to the seat and slidably provided with respect to the lower rail member,
A lower rail-side engaged portion of the lower rail member, a lock-side engaging portion detachable from the upper rail-side engaged portion of the upper rail member, and a connecting portion on one side of the lock-side engaging portion. And a support portion that is connected to the upper rail member to support the lock side engaging portion with respect to the upper rail member, and the lock side engaging portion is elastically deformed by the lock side engaging portion so that the lower rail member and the upper A lock member displaced between the rail member,
An operation operated to switch between a locked state in which the lock-side engaging portion is engaged with the lower rail-side engaged portion and the upper rail-side engaged portion, and an unlocked state in which the locked state is released. Components,
With
The lock member has an extending portion extending along the connecting portion from the one side of the lock-side engaging portion,
When the extension is pressed by the operation member, the support portion is elastically deformed so that the lock-side engagement portion and the extension portion are integrally inclined with respect to the support portion. Seat slide device. The locking member, so as to sandwich the connecting portion, to claim 1, characterized in that it comprises a pair of extending portions extending along the connecting portion from the one side of the lock-side engagement portion The sheet slide device as described in the above. The lock member has a fitting portion fitted to a fitted portion formed on the upper rail member,
3. The seat slide device according to claim 1, wherein the fitting portion is press-fitted into the fitted portion so as to be urged toward the fitted portion. 4.   The width of at least one of the fitting portion and the fitted portion decreases in a direction perpendicular to the biasing direction as the biasing direction of the fitting portion increases. Seat slide device. The lock member has the support portion provided so as to be interposed between the lock-side engagement portion and the fitting portion,
5. The seat slide device according to claim 3, wherein the fitting portion is urged toward the fitted portion by elastically deforming the support portion. 6.   6. The lock member according to claim 3, wherein the lock member includes a plurality of fitting portions that respectively fit into the plurality of fitted portions formed in the upper rail member. The sheet slide device according to item 1.   7. The lock member according to claim 3, wherein the lock member is configured to be elastically deformable so as to be switched between the locked state and the unlocked state with the fitting portion serving as a fulcrum. The sheet slide device according to item 1.   8. The seat slide device according to claim 3, wherein the lock member is integrally formed by a plate-shaped member as a whole. 9. The lock member is provided between a pair of fitting portions that respectively fit into a pair of fitted portions formed on the upper rail member, and between the lock-side engaging portion and the pair of fitting portions. And a pair of the support portions provided so that
The locking member is elastically deformed into at least one of the pair of the fitting portions and at least one of the pair of the supporting portions by receiving the external force, and the pair of the fittings is formed by not receiving the external force. The seat slide device according to any one of claims 1 to 8, further comprising an elastic portion that is displaced between a joint portion and a retracted position retracted from between the pair of support portions.   The said elastic part is located in the said deformation | transformation position, when receiving the pressing force from the said operation member attached, and when receiving no external force, it is located in the said evacuation position. Sheet slide device. The pair of support portions are formed so as to extend from the lock side engagement portion,
The elastic portion is formed so as to extend from the lock-side engaging portion between the pair of support portions and to retreat from between the pair of support portions toward the pair of fitting portions. The seat slide device according to claim 9 or 10, wherein:

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