JP2002144932A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a cam, the upper portion of a latch of a locking mechanism in an upper rail, an upper cover, a slide cover and the like from being left projected on floor carpet when a seat is sprung up sideways or attached or detached, and prevent a collision of a passenger, baggage and the like with a projection. SOLUTION: A locking mechanism 41 in a seat slide device 21 for a seat body 3 comprises a locking member 42 arranged for sideways outward advance and retreat from and to a side portion of an upper rail 23, and locking springs 47 for urging the locking member 42 into a locking hole 43 formed in a side portion of a lower rail 22. The locking member 42 has a guide groove 42b. A cam 46 is pivotally supported via a pin 45 on the upper rail 23 above the locking member 42. A turning movement of the cam 46 unlocks the locking member 42 against the urging by the locking springs 47. The cam 46 is operationally turned by a swing lever 57 coupled to an operating lever 53 via an operating force transmitting member 55.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device, and more particularly, to a lower rail which is mounted on the inner and outer sides of a seat mounting floor in the front-rear direction. The present invention relates to a pair of left and right seat slide devices, each of which is slidably guided in a direction and has an upper rail attached to a seat body side.

[0002]

2. Description of the Related Art In a conventional vehicle such as a one-box car, both occupant loading and luggage loading are used, so that an average number of seats and luggage loading space are provided. In addition to the driver's seat and the passenger's seat, there are cases where a detachable seat and a movable seat or a side-leaching seat are provided.

As shown in FIG. 9, the outer side 3a of a seat body 3 of a seat cushion 2 of a side-leaping seat 1 can be adjusted to move forward and backward by an outer side 5a of a seat slide device 5 of a seat mounting floor 4 of a vehicle body. The seat 3 is rotatably supported by a pivot 8 on the outer rail 7 side of the outer side 5a of the seat slide device 5, and a leg 3c is provided on the inner side 3b of the seat body 3 so as to be foldable. There is also proposed a seat slide device for a horizontally flipping sheet in which the leg 3c is detachably attached to the upper rail 7 on the inner side 5b of the seat slide device 5. In FIG. 9, reference numeral 6 denotes a lower rail, and 4a denotes a floor carpet. Such a sheet 1 is disclosed in JP-A-10-264692 and JP-A-10-2586.
No. 59, and the like.

FIG. 8 shows details of an inner side 5b of a conventional seat slide device 5, and a lower rail 6 of the seat slide device 5 is provided with bolts 6b and nuts on a seat mounting floor 4 via a bracket 6a. 6c, the upper rail 7 is slidably guided and supported on the lower rail 6 in the longitudinal direction, and is detachably attached to the seat body 3 side. A lock hole 13 of a lock mechanism 11 is provided in the lower rail 6 of the seat slide device 5, and a latch 15 as a lock member inserted into the lock hole 13 is provided to be vertically movable. Above the latch 15, an upper cover 17 is provided, and a slide cover 18 and a finisher 19 are provided.

[0005]

However, in the case of the above-mentioned conventional sheet slide device 5 for the laterally jumping sheet 1, the upper rail is placed on the floor carpet 4a when the sheet 1 is horizontally jumped up and down. 7 lock mechanism 11
The upper part of the latch 15 and the upper cover 17 and the slide cover 18 remain in a protruding state, and there is a risk that passengers and luggage may collide with these projections, hindering the loading and unloading of luggage and the like. There is a fear that it will worsen.

Further, since the lower rail 6 of the seat slide device 5 is fixed to the seat mounting floor 4 with the bolts 6b and the nuts 6c via the bracket 6a, it is difficult to control the precision of the parts, the cost is increased, and the weight is increased. It had increasing disadvantages.

[0007] An object of the present invention is to prevent the upper portion of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, and the like from being left on the floor carpet when the seat is flipped up or down, and there is no danger of remaining. There is no risk of collision of passengers or luggage with the protrusions, and loading and unloading of luggage and the like can be performed easily and quickly, and the appearance can be improved. Excellent,
Another object of the present invention is to provide a seat slide device capable of reducing the weight.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a seat slide device according to a first aspect of the present invention is mounted on a sheet mounting floor in a front-rear direction. A lower rail, and an upper rail slidably guided in the longitudinal direction on the lower rail and attached to the seat body, wherein the seat slide device is located outside the side of the upper rail. A locking member provided to be able to move forward and backward,
A lock spring for urging a lock member into a lock hole formed in a side portion of the lower rail, a cam pivotally supported by a pin provided on the upper rail above the lock member, and the cam is The lock member is unlocked against the bias of the lock spring by the rotation of the cam, and the cam is connected to an operation lever provided on the seat body side via an operation force transmission member. It is characterized by being pivoted by a swinging lever.

A seat slide device according to a second aspect of the present invention is provided with a lower rail mounted on the sheet mounting floor in the front-rear direction, and guided and supported slidably in the longitudinal direction on the lower rail. In a seat slide device including an upper rail attached to a seat body side, the seat slide device is formed on a side of the lower rail and a lock member provided to be able to advance and retreat from a side portion of the upper rail to a side outside. A lock spring for urging the lock member into the lock hole, a guide portion is formed on the lock member, and a cam is pivotally supported by a pin provided on an upper rail above the lock member, and the cam is locked. The lock member is engaged with the guide portion of the member, and the lock member is unlocked by the rotation of the cam against the bias of the lock spring. Characterized in that it is operated to rotate by chromatography preparative body rocking lever which is connected via an operating force transmitting member to the operating lever provided on.

A seat slide device according to a third aspect of the present invention is provided with a lower rail mounted on the sheet mounting floor in the front-rear direction, and guided and supported slidably in the longitudinal direction on the lower rail. In a seat slide device including an upper rail attached to a seat body side, the lower rail has a body portion having a substantially upward U-shape,
A pair of left and right upper portions extending inward from both end portions of the main body to form an opening, wherein the upper rail has a main body mounted inside the lower rail; A lock member provided so as to be able to advance and retreat outwardly from the side of the portion, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail, wherein a guide portion is provided on the lock member. Is formed, and a cam is pivotally supported by a pin provided on an upper rail above the lock member, the cam engages with a guide portion of the lock member, and the rotation of the cam causes the lock member to lock the lock spring. The cam is unlocked against the bias, and the cam is turned by a swing lever connected to an operation lever provided on the seat body side via an operation force transmission member.

A seat slide device according to a fourth aspect of the present invention is provided with a lower rail mounted on the sheet mounting floor in the front-rear direction, and guided and supported slidably in the longitudinal direction on the lower rail. In a seat slide device including an upper rail attached to a seat body side, a leg portion is provided on the seat body so as to be foldable, and a lower rail of the seat slide device below the leg portion has a substantially upward U-shaped body. And a pair of left and right upper portions extending inward from both ends of both sides of the main body to form an opening, wherein the upper rail has a main body mounted inside the lower rail. A lock member provided so as to be able to advance and retreat outward from a side portion of the main body, and a lock spur for urging the lock member into a lock hole formed in a side portion of the lower rail. A guide portion is formed on the lock member, a cam is pivotally supported on a pin provided on an upper rail above the lock member, and the cam engages with a guide portion of the lock member, and With the rotation of the lock member, the lock member is unlocked against the bias of the lock spring, and one end of a swing lever is connected to an operation lever provided on the seat body side via an operation force transmitting member, The center of the moving lever is pivotally supported by the leg, and the cam is rotated by being pushed by the other end of the swing lever by turning the swing lever by operating the operation lever. .

In a seat slide device according to a fifth aspect of the present invention, a cam provided on the upper rail has an operating piece extending obliquely upward, and the operating piece does not protrude above the upper end of the lower rail. It is characterized by being provided.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat slide device according to the present invention will be described below in detail with reference to the drawings. 1 to 7 each show an embodiment of the present invention. FIG. 1 shows a cross-sectional view of the seat slide device of the present invention, and FIG. 2 shows a side view of the seat slide device. FIG. 3 is a side view of the seat slide device when the operation lever is operated, and FIG.
5A and 5B are a plan view and a side view of the seat slide device in a locked state, and FIGS. 5A and 5B are a plan view and a side view of the seat slide device in an unlocked state. 6 is an exploded perspective view of the upper rail, and FIG. 7 is an exploded perspective view of the seat slide device.

The seat slide device 21 according to the present invention
Can be applied to a horizontal flip-up sheet, a detachable sheet or a normal sheet shown in FIG. As shown in FIG. 7, the sheet slide device 21 includes a sheet placing floor 4.
And a lower rail 22, which is long mounted in the front-rear direction, and an upper rail 23, which is slidably guided and supported on the lower rail 22 in the longitudinal direction, and which is detachably attached to the leg 3 c as the seat body 3 side. Have. The lower rail 22 and the upper rail 23 of the seat slide device 21 are formed by extrusion molding from a light alloy such as aluminum die-cast or magnesium alloy.
Note that the seat slide device 21 may be a hard synthetic resin molded product.

As shown in FIG. 1, the lower rail 22
Is a pair of left and right upper portions 22d, 2 which are bent upward and extend inward from the distal ends of both sides of the main portion 22a to form an opening 22e.
2d, and roller receiving steps 22f, 22f are formed on both sides of the bottom of the main body 22a. still,
The shape of the bottom of the main body 22a is not limited to the shape shown.

As shown in FIGS. 1 and 6, the upper rail 23 includes a main body 23a to be assembled inside the lower rail 22, and slider receiving portions 23c, 23c formed on both sides of the main body 23a. have. A latch 42 having a latch claw 42 a as a lock member of the lock mechanism 41 is provided between the upper rail 23 and the lower rail 22. Further, a plurality of lock holes 43 into which the latch claws 42a are inserted and locked are formed on the side of the main body 22a of the lower rail 22 at appropriate intervals.

As shown in FIG. 1, an upper portion of a main body portion 22a of the lower rail 22 and a pair of left and right upper portions 22d, 22d are provided.
At the vicinity of the connecting portion, finisher mounting portions 31 and 31 are formed so as to protrude obliquely upward.
, Finishers 33, 33 are attached. The finisher 33 is formed of a synthetic resin material, a soft lip 33a is formed on the inside, a locking portion 33b is formed on the back side of the finisher 33, and the locking portion 33b is locked by the finisher mounting portion 31. You. Incidentally, as shown in FIG.
End caps 33 are provided at the front and rear ends of the finisher 33.
c, 33d are attached.

A slider 35 is inserted between the inside of the lower rail 22 and the slider receiving portions 23c, 23c of the upper rail 23, and steps 22f, 22f at the bottom of the main body 22a of the lower rail 22 and the main body of the upper rail 23. The roller 37 is inserted between the lower portion of the portion 23a. Reference numeral 37c is a roller shaft.

The roller 37 has both sides formed to have a larger diameter than the center, and both sides of the roller are placed on the steps 22f, 22f at the bottom of the main body 22a of the lower rail 22, so that the rollers 37 are formed. A wide space can be secured between the small-diameter central portion 37 and the bottom portion of the main body portion 22a of the lower rail 22. In addition, the lower rail 22 is directly bolted to the floor surface 4 without using a bracket.
2 bolts, bolt 51
There is no fear that the head 51a of the head abuts on the roller 37.

The upper part 22d, 2 of the lower rail 22
An arc-shaped notch 22g through which the head 51a of the bolt 51 can be inserted is formed on the 2d opening 22e side, and the bolt 51 of the lower rail 22 can be easily fixed.

As shown in FIGS. 1 and 6, a pin 45 is provided on the main body 23a of the upper rail 23 in a direction orthogonal to the longitudinal direction of the upper rail 23.
A cam 46 is pivotally supported on the fifth wheel 5. The cam 46 is engaged with the latch 42 as a lock member, and the rotation of the cam 46 unlocks the latch 42 as the lock member against the bias of the lock spring 47.

The outer peripheral surface on one side of the cam 46 has an action surface 46.
The working surface 46a is engaged with an oblique guide groove 42b as a guide portion formed on the latch 42. The cam 46 has an operating piece 46b extending diagonally upward.
Are formed. The operating piece 46b is a lower rail 2
The second upper portions 22d, 22d are provided at positions not protruding above the opening 22e. The latch 42 has a locking hole 42c for locking one end 47a of a pair of left and right lock springs 47, respectively.

The other end 47b of the pair of left and right lock springs 47 is attached to the upper rail 23,
2 is urged in the direction of the lock hole 43 on the side of the lower rail 22, and one end 47 a of the lock spring 47 is inserted into the lock hole 42 c from below the lock hole 42 c of the latch 42. It prevents falling down.

As shown in FIG. 7, a striker 38 is attached to the upper rail 23 by a spring pin 39, and a hook member provided on the leg 3c of the seat body 3 is engaged with the striker 38. Accordingly, the leg 3c on the seat body 3 side and the upper rail 23 are integrally slidably adjusted back and forth, and when the seat body 3 is set to the horizontal jumping state, the hook member and the striker 38 are locked. Is released, and the leg 3c is folded toward the bottom of the seat body 3. In the present embodiment, the legs 3c are provided, but the legs 3c may be omitted.

As shown in FIGS. 2 and 3, the cam 46 is rotated by an oscillating lever 57 connected to an operating lever 53 provided on the seat body 3 via an operating force transmitting member 55. . The center of the swing lever 57 is pivotally supported by the leg 3c by a pivot pin 59, and an operating force transmitting member 55 made of a wire or the like is connected to one end 57a of the swing lever 57. The other end 57b of 57 is an operating piece 46b formed on the cam 46 and extending obliquely upward.
It is configured to abut with. The swing lever 57
Is urged by a spring 61 in a direction to maintain the locked state.

Therefore, when the operating lever 53 is operated in the direction of arrow a from the locked state shown in FIGS. 2 and 4A and 4B, the operating force of the operating lever 53 is transmitted via the operating force transmitting member 55. One end 57a of the swing lever 57 is pulled upward as shown by an arrow b in FIG. 3, and the other end 57b of the swing lever 57 presses an operation piece 46b formed on the cam 46 and extending obliquely upward.

When the cam 46 is pressed by the other end 57b of the swing lever 57 from the locked state shown in FIGS. 4 (a) and 4 (b), the action surface 46a of the cam 46 becomes a guide portion formed on the latch 42. 5 (a) and 5 (b), a pair of left and right lock springs 47 biasing in the direction of the lock hole 43 on the side of the lower rail 22 as shown in FIGS. The latch 42 is pulled out from the lock hole 43 against the lock, and the lock is released. When the seat body 3 is detached and attached in this unlocked state, the operating piece 46b of the cam 46 does not protrude from the upper end of the lower rail 22, and there is no possibility that a passenger, a load, or the like collides with the protrusion.

It should be noted that the present invention is not limited to the above-described structure of the embodiment, and the shape and structure of each part of the seat slide device can be freely modified and changed as necessary. Various modifications may be considered, including the shape and material of the rail.

[0029]

The above is an embodiment of the seat slide device according to the present invention. According to the seat slide device of the first aspect of the present invention, the seat slide device is located outside the side of the upper rail. A lock member provided to be able to move forward and backward, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail,
A cam is pivotally supported on a pin provided on an upper rail above the lock member, the cam engages with the lock member, and the rotation of the cam locks the lock member against the bias of the lock spring. The cam is released, and the cam is rotated by a swing lever connected to an operation lever provided on the sheet body side via an operation force transmitting member. The moving lever moves with the seat body, and only the cam remains on the lower rail and the upper rail without protruding. Therefore, the upper part of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, etc. protrude on the floor carpet. There is no danger of remaining in the state, and there is no danger of collision of passengers or luggage with the protrusions, and loading and unloading of luggage can be performed easily and quickly. It is possible to improve.

Further, according to the seat slide device of the second aspect of the present invention, the seat slide device is provided with a lock member provided so as to be able to advance and retreat from the side of the upper rail to the side outside, and the side of the lower rail. A lock spring for urging a lock member into a lock hole formed in the portion, a guide portion is formed on the lock member, and a cam is pivotally supported by a pin provided on an upper rail above the lock member, The cam engages with a guide portion of a lock member, and the rotation of the cam unlocks the lock member against the bias of a lock spring. The cam is moved to an operation lever provided on the seat body side. Since the swing operation is performed by the swing lever connected via the operation force transmitting member, the swing lever moves together with the seat body when the seat is flipped up or down, and the upper lever is moved. Since the rail only remain in a state where the cam does not protrude, of the latch of the locking mechanism of the upper rail on the floor carpet top or upper cover,
There is no risk that the slide cover or the like will remain in a protruding state, and there is no risk that passengers or luggage will collide with the protrusions, so that loading and unloading of luggage and the like can be performed easily and quickly, and the appearance can be improved. it can.

Further, according to the seat slide device of the third aspect of the present invention, the lower rail has a substantially upward U-shaped main body, and extends inward from both ends of both sides of the main body. A pair of left and right upper parts forming an opening,
The upper rail has a main body that is assembled inside the lower rail, and is formed on a side of the lower rail, and a lock member that is provided so as to be able to advance and retreat from a side of the main body to a side outside. A lock spring for urging the lock member into the lock hole, a guide portion is formed on the lock member, and a cam is pivotally supported by a pin provided on an upper rail above the lock member, and the cam is locked by the lock member. The lock member is unlocked against the bias of the lock spring by the rotation of the cam, and the cam transmits an operation force transmitting member to an operation lever provided on the seat body side. When the seat is flipped up or down, it is rotated by the swing lever connected via
The swing lever moves with the seat body, and only the cam remains on the upper rail without protruding, so the upper part of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, etc. protrude above the floor carpet Therefore, there is no possibility that passengers or luggage will collide with the protrusions, and the loading and unloading of luggage and the like can be performed simply and quickly, and the appearance can be improved.

Further, according to the seat slide device of the fourth aspect of the present invention, the seat body is provided with a leg portion that is foldable, and the lower rail of the seat slide device below the leg portion has a substantially upward U-shape. And a pair of left and right upper parts extending inward from both ends of the main body part to form an opening, and the upper rail is assembled inside the lower rail. A lock member provided so as to be able to advance and retreat from a side portion of the main body portion to a side portion outside, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail. ,
A guide portion is formed on the lock member, and a cam is pivotally supported on a pin provided on an upper rail above the lock member. The cam engages with a guide portion of the lock member, and the cam rotates to rotate the cam. The lock member is unlocked against the bias of the lock spring, and one end of a swing lever is connected to an operation lever provided on the seat body side via an operation force transmission member, and a central portion of the swing lever is Is pivotally supported by the leg, and the cam is pushed and rotated by the other end of the swing lever by the swing of the swing lever by the operation of the operation lever, so that the seat is flipped up or down sideways. At that time,
The swing lever moves with the seat body, and only the cam remains on the upper rail without protruding, so the upper part of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, etc. protrude above the floor carpet Therefore, there is no possibility that passengers or luggage will collide with the protrusions, and the loading and unloading of luggage and the like can be performed simply and quickly, and the appearance can be improved.

According to the seat slide device of the fifth aspect of the present invention, the cam provided on the upper rail is formed with an operating piece extending obliquely upward, and the operating piece projects upward from the upper end of the lower rail. Since the swing lever moves together with the seat body when the seat is flipped up or down, since only the cam operation piece remains on the upper rail without protruding,
There is no danger that the operating piece of the cam will protrude above the floor carpet, and there is no danger that the upper part of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, etc. will remain in a protruding state, and that the passengers and luggage etc. There is no risk of collision, and loading and unloading of luggage etc. can be performed easily and quickly,
Further, the appearance can be improved.

According to the present invention, the cam operating piece, the upper part of the latch of the lock mechanism of the upper rail, the upper cover, the slide cover, and the like are projected on the floor carpet when the seat is flipped up or down. There is no danger that passengers and luggage will collide with these projections, and the loading and unloading of luggage and the like can be performed easily and quickly, and the appearance can be improved. Since the bolts and nuts are directly fixed to the floor without using the bracket, it is possible to obtain a seat slide device that can easily manage the precision of parts, is economical, and can reduce the weight.

[Brief description of the drawings]

FIG. 1 is a sectional view of a seat slide device according to the present invention.

FIG. 2 is a side view of the seat slide device according to the present invention in a locked state.

FIG. 3 is a side view of the seat slide device according to the present invention when the operation lever is operated.

4A and 4B respectively show a locked state of the seat slide device according to the present invention, wherein FIG. 4A is a plan view and FIG. 4B is a side view.

FIGS. 5A and 5B respectively show the unlocked state of the seat slide device according to the present invention, wherein FIG. 5A is a plan view and FIG.

FIG. 6 is an exploded perspective view of an upper rail of the seat slide device according to the present invention.

FIG. 7 is an exploded perspective view of the seat slide device according to the present invention.

FIG. 8 is a sectional view of a conventional seat slide device.

FIG. 9 is a front view of a conventional sheet slide device for a horizontally flipping sheet.

[Explanation of symbols]

 Reference Signs List 3 seat body 3c leg 4 floor 4a floor carpet 21 seat slide device 22 lower rail 22a body 22d upper part 22e opening 23 upper rail 23a body 23c slider receiving part 31 finisher attaching part 33 finisher 33a lip part 33b locking part 35 Slider 37 Roller 41 Lock mechanism 42 Latch 42a Latch claw 42b Guide groove 43c Lock hole 43 Lock hole 45 Pin 46 Cam 46a Working surface 46b Operating piece 47 Lock spring 51 Bolt 53 Operating lever 55 Operating force transmitting member 57 Swing lever 59 Pivot pin 61 spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mori Sachi Mori 771 Koizono, Ayase-shi, Kanagawa F-term in Ikeda Bussan Co., Ltd. (Reference) 3B087 BA02 BB02 BC06 BC08

Claims (5)

[Claims] 1. A seat comprising: a lower rail mounted on the sheet mounting floor in the front-rear direction; and an upper rail slidably guided in the longitudinal direction on the lower rail and attached to the seat body. In the slide device, the seat slide device is provided with a lock member provided so as to be able to advance and retreat outward from a side portion of an upper rail, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail. A cam is pivotally supported by a pin provided on an upper rail above the lock member, the cam engages with the lock member, and the rotation of the cam causes the lock member to be biased by a lock spring. The cam is unlocked, and the cam is rotated by a swing lever connected to an operation lever provided on the seat body side via an operation force transmission member. Seat slide apparatus characterized by being created. 2. A seat comprising: a lower rail mounted on the sheet mounting floor in the front-rear direction; and an upper rail slidably guided in the longitudinal direction on the lower rail and attached to the seat body. In the slide device, the seat slide device is provided with a lock member provided so as to be able to advance and retreat outward from a side portion of an upper rail, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail. A guide portion is formed on the lock member, a cam is pivotally supported on a pin provided on an upper rail above the lock member, and the cam engages with the guide portion of the lock member, and By the rotation, the lock member is unlocked against the bias of the lock spring, and the cam is transmitted to the operation lever provided on the seat body side. Seat slide apparatus characterized by being operated to rotate the swing lever which is connected via a member. 3. A seat comprising: a lower rail mounted on the seat mounting floor in the front-rear direction; and an upper rail slidably guided in the longitudinal direction on the lower rail and attached to the seat body. In the slide device, the lower rail includes a main body having a substantially upward U-shape, and a pair of left and right upper portions extending inward from the front end sides of both sides of the main body to form an opening. The rail has a main body attached to the inside of the lower rail, a lock member provided to be able to advance and retreat from the side of the main body to the side outside, and a lock hole formed in the side of the lower rail. A lock spring for urging the lock member, a guide portion is formed on the lock member, and a cam is pivotally supported by a pin provided on an upper rail above the lock member, The cam is engaged with the guide portion of the lock member, and the rotation of the cam unlocks the lock member against the bias of the lock spring, and the cam is operated by the operation lever provided on the seat body side. A seat slide device which is rotated by a swing lever connected via a force transmitting member. 4. A seat comprising: a lower rail mounted on the seat mounting floor surface in the front-rear direction; and an upper rail slidably guided in the longitudinal direction on the lower rail and attached to the seat body side. In the slide device, a leg portion is provided on the seat body so as to be freely foldable, and a lower rail of the seat slide device below the leg portion has a substantially upward U-shaped main body portion, and a front end portion on both sides of the main body portion. A pair of left and right upper portions extending inward to form an opening, wherein the upper rail has a main body that is assembled inside the lower rail, and is laterally outward from a side of the main body. A lock member provided to be able to move forward and backward, and a lock spring for urging the lock member into a lock hole formed in a side portion of the lower rail, wherein a guide portion is formed on the lock member. A cam is pivotally supported by a pin provided on an upper rail above the lock member, the cam engages with a guide portion of the lock member, and the rotation of the cam causes the lock member to urge a lock spring. One end of the swinging lever is connected to an operating lever provided on the seat body side via an operating force transmitting member, and a central portion of the swinging lever is pivotally supported by the legs. The seat slide device is characterized in that the cam is rotated by being pushed by the other end of the swing lever by rotation of the swing lever by operation of the operation lever. 5. The cam provided on the upper rail is formed with an operating piece extending obliquely upward, and the operating piece is provided at a position not protruding above the upper end of the lower rail. The seat slide device according to any one of claims 1 to 4.