JP2010095171A - Slide rail device of vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide rail device of a vehicular seat having a small number of part items compared to the conventional one and facilitating assembling due to a simple device structure. <P>SOLUTION: The slide rail device 3 includes a lower rail 10, an upper rail 20, a locking member 30 for locking the upper rail, and an operating lever 5 connected to the locking member. The locking member 30 is a long member having spring elasticity. The locking member 30 is simply non-turnably mounted to the upper rail 20 based on the projection/recess fitting of a non-circular shaped fitting projection part 41 provided on both side of a central connection part 33 of the locking member 30 with a non-circular shaped fitting recess part 42 provided on both side wall parts of the upper rail 20. Therefore, when operating the operating lever 5 for releasing locking, a spring force for returning to the original state is generated in the locking member 30 and the spring force provides both a return force to a locking position and a return force to the original position of the operating lever 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a slide rail device for a vehicle seat for sliding the vehicle seat back and forth and positioning the vehicle seat at a predetermined position.

  Patent Document 1 discloses a vehicle slide adjuster which is a kind of slide rail device (hereinafter, reference numerals in Patent Document 1 are cited). This slide adjuster includes a lower rail 2, an upper rail 4 attached to the lower rail 2 so as to be slidable in the front-rear direction, and a lock mechanism for locking or unlocking the upper rail 4 with respect to the lower rail. The lock mechanism includes a lock plate 12 rotatably provided in the upper rail 4, an elastic member 20 that urges the lock plate 12 in an upward rotation direction, an operation member 26 (operation lever), and an upper. A lock plate actuating member 22 which is provided so as to be swingable with respect to the rail 4 via a pin 24 and whose front end is connected to the operation member 26, and the front end of the lock plate actuating member 22 is always biased downward. And an elastic member 28.

  In the lock mechanism of Patent Document 1, the upper rail 4 is engaged with the lower rail 2 by engaging the lock claw 2f of the lower rail 2 with the lock hole 12c of the lock plate 12 biased upward by the elastic member 20. Locked. On the other hand, the lock is released when the occupant pulls up the operation member 26. That is, as the operating member 26 is pulled up, the operating member 26 swings in the direction of lifting the front end against the biasing force of the elastic member 28, while the rear end of the operating member 26 is attached to the elastic member 20. The lock plate 12 is rotated downward against the force. As a result, the lock plate 12 is detached from the lock claw 2f of the lower rail 2, and the lock of the upper rail 4 with respect to the lower rail 2 is released.

  Patent Document 2 discloses an automobile seat runner which is a kind of slide rail device (hereinafter, the reference numerals in Patent Document 2 are cited). The runner includes a lock mechanism for locking or unlocking the moving rail 7 (upper rail) with respect to the fixed rail 6 (lower rail). The main part of the lock mechanism includes a main latch 20 and an additional latch 21. It consists of a latch device 19. The main latch 20 is integrally formed with a blade 25 made of spring steel, and a part of the main latch 20 is fixed to the back side of the upper wall portion of the moving rail 7 so as to be pivotable about the first pivot axis Y1. Yes. The additional latch 21 is mounted on the main latch 20 so as to be pivotable about the second pivot axis Y2.

  In the lock mechanism of Patent Document 2, the moving rail 7 is locked by the series of teeth 26 and 30 on the main latch 20 and the additional latch 21 engaging with the catch 33 of the fixed rail 6. On the other hand, when the occupant pulls up the operation bar 16, the locking / non-locking means 15 rotates about the horizontal axis Y, and the control finger 17 provided at the rear end of the means 15 moves to the main latch 20. When the additional latch 21 is pressed from the top to the bottom against its spring elasticity, the series of teeth 26 and 30 are detached from the catch 33 of the fixed rail 6 and the movable rail 7 is unlocked.

JP 2007-133103 JP 2004-314961 A

However, the conventional slide rail device has various problems.
The device of Patent Document 1 requires two separate and independent elastic members (biasing springs), that is, an elastic member 20 for the lock plate 12 and an elastic member 28 for the lock plate actuating member 22. However, there was a drawback that it was difficult to assemble.

  In the device of Patent Document 2, although the main latch 20 and the blade 25 made of spring steel are integrally formed to reduce the number of parts, the latch device 19 including the main latch 20 and the additional latch 21 is structurally locked. In order to release, it was necessary to press the main latch 20 and the additional latch 21 from the top to the bottom against the spring elasticity. Therefore, the operation bar 16 cannot be directly applied to the latch device 19, and the locking / non-locking means 15 having the control finger portion 17 for pressing the main latch 20 and the additional latch 21 downward from above. Must be interposed between the operation bar 16 and the latch device 19. As described above, the technique disclosed in Patent Document 2 cannot be said to have succeeded in reducing the number of parts and simplifying the structure of the apparatus when viewed as the entire apparatus.

  An object of the present invention is to provide a slide rail device that has fewer parts than the prior art, has a simple device structure, and is easy to assemble.

The invention according to claim 1 includes a lower rail, an upper rail slidably attached to the lower rail, a lock member mounted on the upper rail to lock the upper rail with respect to the lower rail, and the lock A slide rail device including an operation lever operated to release a locked state by a member,
The lower rail has a side wall portion formed with a plurality of lock teeth,
The upper rail has a side wall portion provided with a fitting portion having a noncircular side view,
The lock member is a long member having spring elasticity, a front end portion connected to the operation lever, a rear end portion having an engagement portion engageable with a lock tooth of the lower rail, and front and rear thereof A fitting portion facing the fitting portion of the side wall portion of the upper rail at an intermediate position between both end portions, and the fitting portion of the locking member is a non-circular fitting portion of the side wall portion of the upper rail Is a fitting portion having a non-circular shape that can be fitted to the side, and the non-circular fitting portion of the locking member and the non-circular fitting portion of the upper rail are mutually fitted, whereby the locking member Is a slide rail device that is mounted on the upper rail.

The invention of claim 2 is the slide rail device according to claim 1,
The non-circular fitting part of the side wall part of the upper rail is a fitting concave part having a quadrangular side view,
The non-circular fitting portion of the locking member is a fitting convex portion having a quadrangular shape when viewed from the side corresponding to the quadrangular shape of the fitting concave portion of the side wall portion of the upper rail.

  According to a third aspect of the present invention, in the slide rail device according to the second aspect, the lock member has a pair of side wall portions that extend in the longitudinal direction and are parallel to each other at a predetermined interval in the width direction. In addition, the fitting convex portion having a quadrangular shape when viewed from the side is formed by stamping out a part of each side wall portion of the lock member from the inside toward the outside.

According to a fourth aspect of the present invention, in the slide rail device according to any one of the first to third aspects, the non-circular fitting portion of the lock member and the non-circular fitting portion of the upper rail are mutually fitted. In the mounted state of the lock member to the upper rail, the lock member is disposed at a lock position where the engagement portion of the rear end portion engages with the lock teeth of the lower rail,
When the operation lever is operated for unlocking, the lock member is elastically deformed while accumulating repulsive force to return to the original state, and the engagement of the rear end portion of the lock member from the lock position is performed. The joint portion is switched to an unlock position where it is separated from the lock teeth of the lower rail.

[Action]
According to the present invention, the non-circular fitting portion of the lock member and the non-circular fitting portion of the upper rail side wall portion are fitted to each other, whereby the lock member is in an initial state attached to the upper rail. In this initial state, the engagement portion of the rear end portion of the lock member and the lock teeth of the lower rail are engaged with each other, and the upper rail is locked to the lower rail based on this engagement relationship. By the way, in the present invention, the lock member itself is formed as a long member having spring elasticity, and furthermore, the non-circular fitting portion (preferably a square fitting convex portion) of the lock member and the non-fitting of the upper rail side wall portion. Circular fitting portions (preferably rectangular fitting concave portions) are fitted to each other. Therefore, even when the occupant operates the operation lever upward (or downward) and displaces the front end of the lock member upward (or downward) in order to release the lock from the initial state (locked state), The member does not simply rotate around the non-circular fitting portion (that is, cannot be simply rotated), but instead elastically deforms while accumulating a repulsive force to return to the original state over the entire lock member. Then, accompanying the elastic deformation of the lock member, the rear end portion of the lock member is displaced in a direction in which the engaging portion is detached from the lock teeth of the lower rail, and as a result, the lock of the upper rail with respect to the lower rail is released. . After that (for example, after adjusting the front / rear position of the upper rail with respect to the lower rail), when the occupant releases his / her hand from the operation lever, the operation lever and the front end of the lock member are not operated based on the repulsive force stored in the lock member. At the same time, the rear end portion of the lock member also returns to the lock position (initial state) where the engaging portion engages with the lock teeth of the lower rail.

  According to the invention of claim 1, the lock member itself is configured as a long member having spring elasticity, and the non-circular fitting portion provided on the lock member and the non-circular provided on the side wall portion of the upper rail. The locking member is attached to the upper rail so that it cannot be simply rotated by interfitting with the fitting portion. Therefore, when the occupant operates the operation lever to release the lock, the lock member can exert a repulsive force to return to the original state, and the occupant releases the operation lever after the lock is released. Occasionally, the single lock member is returned to "the biasing spring for returning the operation lever and the lock member front end portion to the initial position before the operation start" and "the lock member rear end portion is returned to the lock position (initial state). It can be used for both purposes as an urging spring. Therefore, it is possible to provide a slide rail device that has fewer parts than the conventional one, has a simple device structure, and is easy to assemble.

  According to the invention of claim 2, the non-circular fitting portion of the side wall portion of the upper rail is a square-shaped fitting concave portion, while the non-circular fitting portion of the lock member corresponding thereto is a square-shaped fitting convex portion. Has become a department. Therefore, the fitting of the lock member to the upper rail based on the concavo-convex fitting relationship is ensured as compared with the case where these fitting portions have a non-circular shape other than the rectangular shape. In addition, when the operation lever for unlocking is operated, the repulsive force is more reliably generated and stored in the lock member. Therefore, according to this configuration, the lock member can function most effectively as the above-described bi-directional biasing spring.

  According to the invention of claim 3, the quadrangular fitting convex portion on the lock member side is formed by stamping out a part of each side wall portion of the lock member from the inside to the outside. Therefore, it is possible to obtain a fitting convex portion having a shape corresponding to the rectangular fitting concave portion on the side wall portion side of the upper rail.

  According to the fourth aspect of the present invention, in the state of being mounted on the upper rail, the lock member is disposed at the lock position where the engagement portion of the rear end portion engages with the lock teeth of the lower rail. When the operation lever is operated, the lock member exhibits the function as a bi-directional biasing spring as described above. As described above, the lock member is only elastically deformed as an urging spring mainly when the operation lever for unlocking is operated, so that a relatively long life can be maintained.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a vehicle seat provided with the slide rail device of the present embodiment, and FIG. 2 is a schematic plan view showing a planar arrangement state of the slide rail device. As shown in FIGS. 1 and 2, the vehicle seat includes a seat cushion 1 and a seat back 2, and a pair of left and right slide rail devices 3 are provided below the seat cushion 1. The left and right slide rail devices 3 are connected via a single operating lever 5 disposed below the front portion of the seat cushion 1, and are operated simultaneously by the operating lever 5. Based on this lever operation, the front / rear slide position of the seat can be locked and unlocked.

  As shown in FIGS. 1 to 3, the slide rail device 3 includes a lower rail 10 and an upper rail attached to the lower rail 10 so as to be slidable back and forth, in addition to the operation lever 5 common to the left and right rail devices 3. 20 and a lock plate 30 as a lock member. The lower rail 10 is fixed to the vehicle body floor F via brackets 6a and 6b provided in the vicinity of the front and rear portions. On the other hand, the seat cushion 1 is fixed to the upper surface side of the upper rail 20 by known fastening means (not shown) such as bolts and nuts.

  As shown in FIG. 3, the lower rail 10 is made of a metal plate such as iron, and is formed into a substantially U-shaped cross section that is symmetric with respect to the left and right sides by subjecting the metal plate to pressing, bending, and the like. The lower rail 10 includes a flat base 11, a pair of left and right vertical walls 12 extending upward from both sides of the base 11, and a pair of flanges folded inward and downward from the upper end of each vertical wall. Part 13. The vertical wall 12 and the flange portion 13 connected to the vertical wall 12 constitute a side wall portion of the lower rail 10. The vertical wall 12 and the flange portion 13 are in a substantially parallel relationship, and a groove is formed between them. Further, a plurality of lock teeth (saw teeth) 14 arranged in series at a predetermined interval are formed at the lower end of the flange portion 13 of each of the left and right side wall portions.

  As shown in FIG. 3 and FIGS. 6A and 6B, the upper rail 20 is made of a metal plate such as iron, and the metal plate is subjected to press work, bending work, etc. It is formed in a U shape. The upper rail 20 includes a flat plate-like base portion 21, a pair of left and right vertical walls 22 extending downward from both sides of the base portion 21, and a pair of flanges folded outwardly from the lower ends of the vertical walls. Part 23. The vertical wall 22 and the flange portion 23 connected to the vertical wall 22 constitute a side wall portion of the upper rail 20. A pair of left and right engaging recesses 24 are formed at substantially the center position in the longitudinal direction of the side wall portion of the upper rail 20 by vertically cutting the vertical wall 22 and the flange portion 23 and opening downward.

  In the present embodiment, the ball and other rolling means 15 (see FIG. 7B) are interposed between the left and right flange portions 23 of the upper rail 20 and the left and right vertical walls 12 of the lower rail 10, whereby the upper The rail 20 is slidable in the longitudinal direction with respect to the lower rail 10.

  The lock plate 30 as a lock member shown in FIG. 3 is a long member having spring elasticity formed by pressing a plate-shaped spring steel or the like. As shown in FIG. 4 and FIGS. 5A and 5B, the lock plate 30 engages and disengages (engages and disengages) with respect to the front end portion 31 to which the operation lever 5 can be connected and the lock teeth 14 of the lower rail 10. A possible rear end portion 32 and a central connection portion 33 that is located between the front end portion 31 and the rear end portion 32 and connects the front and rear end portions are configured.

  The rear end portion 33 of the lock plate has a substantially square shape in plan view, and a rib that protrudes upward (in the direction of the base portion 21 of the upper rail) at the center in the width direction and extends in the longitudinal direction of the lock plate. 34 is provided. A plurality of lock holes 35 (three on one side in this embodiment) are formed on both side portions of the rib 34, respectively. These lock holes 35 function as engagement portions that can be engaged with and disengaged from the lock teeth 14 of the lower rail.

  The front end portion 31 of the lock plate is formed as a substantially U-shaped cross section including a flat plate-like base portion 36 and a pair of left and right side wall portions 37 erected upward on both sides in the width direction. The pair of side wall portions 37 are parallel to each other at a predetermined interval in the width direction of the lock plate, and both the side wall portions 37 are further forward than the front end edge 36a of the base portion 36 and the base portion 36. It extends in the front-rear direction so as to go further rearward than the rear end edge 36b. The central connecting portion 33 of the lock plate is constituted by a rear half portion of the pair of side wall portions 37 extending so as to connect the lock plate front end portion 31 and the lock plate rear end portion 32. For this reason, in this center connection part 33, it is the area | region which opened between the side wall parts 37 on either side.

  As shown in FIGS. 4 and 5 (a) and 5 (b), the base portion 36 of the lock plate front end portion 31 is provided with a clip spring portion 38 formed by bending a tongue piece extending from the rear end edge 36b. . The clip spring portion 38 is for connecting the base end portion (connecting end) of the operation lever 5 to the front end portion 31 of the lock plate in cooperation with the base portion 36 (see FIG. 7A).

  Further, as shown in FIG. 3, an engaging pin 5a is horizontally mounted in the vicinity of the base end portion of the operation lever 5, and the left and right end portions of the engaging pin 5a are respectively left and right from the operation lever main body when the mounting is completed. It protrudes. An engagement portion 39 for engaging the protruding end of the engagement pin 5a attached to the operation lever 5 is cut out at the front end portion of each side wall portion 37 corresponding to the foremost end of the lock plate front end portion 31. ing. Therefore, when the operation lever 5 is operated upward (in the direction of arrow A1 in FIG. 7A) by the occupant, the upper position of the operation lever 5 is determined based on the engagement relationship between the engagement pin 5a and the engagement portion 39. Following the movement, the front end portion 31 of the lock plate is also displaced upward.

  As shown in FIGS. 4 and 5 (a) and 5 (b), each of the left and right side wall portions 37 in the central coupling portion 33 of the lock plate has an outward direction from the outer surface side (a direction toward the side wall portion of the upper rail 20). The fitting convex part 41 which protrudes in FIG. The fitting convex portion 41 is formed by stamping a part of the side wall portion 37 from the inner side toward the outer side, and the fitting convex portion 41 has a quadrangular shape in a side view (more specifically, Is a horizontally long rectangle).

  6 (a) and 6 (b) show the upper rail 20, and FIG. 6 (a) is a side view showing a part of the flange portion 23 of the upper rail (near the position of the line AA) cut out. As shown in this figure, fitting concave portions 42 for fitting fitting convex portions 41 of the respective side wall portions of the lock plate 30 are formed in the left and right vertical walls 22 of the upper rail. These fitting concave portions 42 have a quadrangular shape (more specifically, a horizontally long rectangular shape) in a side view so as to correspond to the quadrangular shape of the fitting convex portion 41.

  In the present embodiment, the lock plate 30 is attached to the upper rail 20 by fitting the fitting protrusions 41 on both side walls of the lock plate 30 to the fitting recesses 42 on both side walls of the upper rail 20. Installed. In this mounted state (initial state), the rear end portion 32 of the lock plate enters the locking recess 24 of the upper rail, and each lock hole 35 engages with the lock teeth 14 of the lower rail 10. Thus, the lock plate 30 is disposed at the “lock position” where the upper rail 20 is locked with respect to the lower rail 10. As will be described in detail later, in the lock plate 30, each lock hole 35 is detached from the lock teeth 14 of the lower rail based on the operation of the operation lever 5, and the lock of the upper rail 20 with respect to the lower rail 10 is released. It can also be placed in the “unlock position”.

  When releasing the lock from the initial state where the lock plate 30 is located at the lock position, the occupant operates the operation lever 5 upward (in the direction of arrow A1 in FIG. 7A). At this time, the lock plate front end portion 31 is also displaced upward following the upward movement of the operation lever 5, but the quadrangular fitting convex portion 41 provided in the central coupling portion 33 of the lock plate is the vertical rail of the upper rail. The lock plate 30 itself does not simply rotate about the fitting convex portion 41 because it is fitted in the rectangular fitting concave portion 42 provided on the wall 22. Instead, the lock plate 30 is elastically deformed while accumulating a repulsive force that tries to return to its original state. More specifically, the lock plate front end portion 31 positioned in front of the fitting convex portion 41 is displaced upward following the operation lever 5 while being bent, while being positioned rearward of the fitting convex portion 41. The rear end 32 of the lock plate is displaced downward while bending in the opposite direction. As a result, the lock holes 35 in the rear end 32 of the lock plate are disengaged from the lock teeth 14 of the lower rail 10, the lock plate 30 is switched from the locked position to the unlocked position, and the upper rail 20 is unlocked with respect to the lower rail 10. The

  In the unlocked state, the occupant can adjust the front / rear position of the seat, that is, the front / rear position of the upper rail 20 with respect to the lower rail 10. Thereafter, when the occupant releases his hand from the operation lever 5, the operation lever 5 and the lock plate front end portion 31 return to the initial positions before the operation starts based on the repulsive force stored in the lock plate 30, and the lock plate The rear end portion 32 also returns to the lock position where the lock hole 35 meshes with the lock teeth 14 of the lower rail.

  Thus, according to the present embodiment, the single lock plate 30 is moved to “the biasing spring for returning the operation lever 5 and the lock plate front end portion 31 to the initial position before the operation start” and “the lock plate rear end portion. 32 can be used for both purposes as an urging spring for returning the lock 32 from the unlock position to the lock position (initial state). Therefore, the slide rail device 3 can be provided with a smaller number of parts than the conventional one, a simple device structure, and easy assembly.

  Further, according to the present embodiment, when the lock plate 30 is mounted on the upper rail 20, the lock plate 30 is disposed at the lock position where the lock hole 35 of the rear end portion 33 engages with the lock teeth 14 of the lower rail 10, When the operation lever 5 is operated for unlocking, the lock plate 30 exhibits the function as a biasing spring for both purposes as described above. As described above, the lock plate 30 is only elastically deformed as an urging spring mainly when the operation lever 5 for unlocking is operated, so that a relatively long life can be maintained.

  In the slide rail device 3 of the present embodiment, the occupant can operate the operation lever 5 downward (in the direction of arrow A2 in FIG. 7A). That is, from the initial state shown in FIG. 7 (a), the operating lever 5 connecting the pair of left and right slide rail devices 3 with the distal end edge 36a of the base portion of the lock plate front end portion 31 as a rotation fulcrum (rotation center). There is room for slight rotation in the direction of arrow A2. Such lever operation in the opposite direction to unlocking is commonly referred to as “cancel operation”.

  In general, the vehicle body floor F to which the slide rail device 3 is fixed is not necessarily flat as ideal, and some unevenness or distortion is inevitable. When a pair of left and right slide rail devices 3 are arranged in parallel on such a non-flat vehicle body floor F, one slide rail device 3 is in a locked state, but the other slide rail device 3 is in an unlocked state. Sometimes a situation occurs. When such an imbalance between the right and left locked / unlocked states occurs, the slide rail device 3 on the side in the unlocked state is forcibly operated by operating the operating lever 5 in the direction of the arrow A2 as described above. Can be reset to the locked state. This is the meaning of the cancel operation.

  When the operation lever 5 is slightly rotated in the direction of the arrow A <b> 2 with the tip edge 36 a of the base portion of the lock plate front end portion 31 as a rotation fulcrum during the cancel operation, the clip spring portion 38 has a base of the operation lever 5. The repulsive force that tries to return the end to the original position is accumulated. Therefore, after the cancel operation, when the occupant releases the force to push down the operation lever 5, the operation lever 5 returns to the initial position shown in FIG. 7A by the repulsive force stored in the clip spring portion 38. Thus, the clip spring portion 38 can also function as an urging spring that returns the canceled operation lever 5 to its original position.

  [Modification] In the above embodiment, the shape of the fitting concave portion 42 on the upper rail 20 side and the fitting convex portion 41 on the lock plate 30 side is a quadrilateral shape in the side view. The shape is not limited to a square shape. Any non-circular shape that prevents a simple rotation of the lock plate 30 during operation of the operation lever 5 and can generate a repulsive force (rebound resilience) to return the lock plate 30 to its original state. Circular shapes can also be employed. Examples of such non-circular shapes include triangles, other polygons, ellipses, and oval shapes.

The side view of a vehicle seat. The schematic plan view which shows the plane arrangement | positioning condition of a left-right paired slide rail apparatus. The disassembled perspective view of the slide rail apparatus according to one Embodiment. The whole perspective view of a lock plate. The lock plate of FIG. 4 is shown, (a) is the top view, (b) is the side view. An upper rail is shown, (a) is the side view, (b) is an expanded transverse sectional view in the AA line. (A) is sectional drawing along the longitudinal direction of a slide rail apparatus, (b) is an expanded horizontal sectional view in the BB line.

Explanation of symbols

3 ... Slide rail device 5 ... Control lever 10 ... Lower rail 12 ... Vertical wall (lower rail side wall)
13 ... Flange (lower rail side wall)
14 ... Lock teeth 20 ... Upper rail 22 ... Vertical wall (upper rail side wall)
23 ... Flange (upper rail side wall)
30 ... Lock plate (lock member)
31 ... Front end portion 32 ... Rear end portion 33 ... Central connecting portion 35 ... Lock hole (engagement portion of the rear end portion of the lock member)
41 ... fitting convex part 41 (side view non-circular fitting part)
42 ... fitting recessed part 42 (side-view non-circular fitting part)

Claims (4)

Lower rail,
An upper rail slidably attached to the lower rail;
A locking member attached to the upper rail to lock the upper rail with respect to the lower rail;
An operation lever operated to release the locked state by the lock member, and a slide rail device comprising:
The lower rail has a side wall portion formed with a plurality of lock teeth,
The upper rail has a side wall portion provided with a fitting portion having a noncircular side view,
The lock member is a long member having spring elasticity, a front end portion connected to the operation lever, a rear end portion having an engagement portion engageable with a lock tooth of the lower rail, and front and rear thereof Having a fitting portion facing a fitting portion of the side wall portion of the upper rail at an intermediate position between both end portions,
The fitting portion of the lock member is a fitting portion having a non-circular shape in a side view that can be fitted to the non-circular fitting portion of the side wall portion of the upper rail, and the non-circular fitting portion of the locking member The slide rail device, wherein the lock member is attached to the upper rail by interfitting with a non-circular fitting portion of the upper rail. The non-circular fitting part of the side wall part of the upper rail is a fitting concave part having a quadrangular side view,
The non-circular fitting portion of the lock member is a fitting convex portion having a quadrangular shape when viewed from the side corresponding to the quadrangular shape of the fitting concave portion of the side wall portion of the upper rail. The described slide rail device.   The lock member has a pair of side wall portions that extend in the longitudinal direction and are parallel to each other at a predetermined interval in the width direction. The slide rail device according to claim 2, wherein the slide rail device is formed by stamping a part of each side wall portion of the member from the inside toward the outside. In a state where the lock member formed by fitting the non-circular fitting portion of the lock member and the non-circular fitting portion of the upper rail to each other is mounted to the upper rail, the lock member is an engagement portion at the rear end portion. Is arranged at a lock position to engage with the lock teeth of the lower rail,
When the operation lever is operated for unlocking, the lock member is elastically deformed while accumulating repulsive force to return to the original state, and the engagement of the rear end portion of the lock member from the lock position is performed. The slide rail device according to any one of claims 1 to 3, wherein the joint portion is switched to an unlock position where the joint portion is separated from the lock teeth of the lower rail.

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