JP7527809B2 - Seat slide device and vehicle seat - Google Patents

Description

The present invention relates to a seat slide device and a vehicle seat.

Seat slide devices that are installed in vehicles and move the seat back and forth are usually equipped with a structure that prevents foreign objects from entering the gap in the rails and covers the gap to improve the appearance. One example is a structure that includes a rubber flap that covers the gap in the rails in its natural state and bends and retreats from the gap when the slider that supports the seat passes through.

As another example, Patent Document 1 describes a structure that has a band-shaped moving member that can be wound and unwound at the end of the rail and moves inside the rail together with the slider.

JP 2012-201268 A

Rubber flaps cannot completely prevent thin, hard objects, such as the heels of high heels or the tips of umbrellas, from entering the gaps. In addition, there is concern that the elasticity of rubber flaps will deteriorate over time, making it impossible to reliably cover the gaps and maintain the appearance quality, and that it will no longer be possible to prevent the entry of foreign objects.

In addition, in a structure that provides a band-shaped moving member that moves with the slider as described in Patent Document 1, there is a concern that the resistance associated with the sliding movement of the vehicle seat will increase due to the resistance associated with unwinding and winding and the sliding resistance between the moving member and the rail, making it difficult to move the seat smoothly.

In this way, it is desirable for the seat slide device and the vehicle seat equipped with it to be able to reliably close the gap in the rail for a long period of time, prevent other parts from entering the gap, and allow smooth seat sliding operation. In other words, it is desirable for the seat slide device to maintain a high level of appearance quality and good usability for a long period of time.

Therefore, the problem that the present invention aims to solve is to provide a seat slide device and a vehicle seat that maintain high appearance quality and good usability for a long period of time.

In order to solve the above problems, the present invention has the following configuration.
1) a rail extending in a first direction and having a slit extending in the first direction;
a slider that protrudes to the outside through the slit, has a protruding portion with both edges in the first direction that are inclined with respect to the first direction, and is engaged with the rail so as to be reciprocally movable in the first direction;
a plurality of plate -like flaps supported on the rail so as to be rotatable between a prone position that closes the slit and an upright position that allows the moving protrusion to pass through, the plate-like flaps being arranged side by side in the first direction;
a plurality of biasing members provided on the rail corresponding to each of the plurality of plate-shaped flaps, the biasing members rotatingly biasing each of the flaps toward the prone position;
Equipped with
This is a seat slide device characterized in that each of the flaps has both edges in the first direction inclined with respect to the first direction, and the inclined edges abut against the inclined edges of the moving protrusion to rotate from the prone position to the upright position, and when the protrusion passes the abutment is released, the flap returns from the upright position to the prone position.
2) The seat slide device according to 1), wherein the rail has a flap support portion that restricts the flap from rotating beyond the prone position from the upright position.
3) The seat slide device according to 1) or 2), wherein the plurality of flaps are provided alternately on one side and the other side of the slit.
4) A seat slide device according to any one of 1) to 3), characterized in that it has a cover attached to the inclined edge portion and abutting the edge portion of the flap at the same inclination angle as the inclined edge portion .
5) A seat slide device according to any one of 1) to 4);
a seat cushion connected to the protruding portion of the seat slide device;
A vehicle seat equipped with the above.
6) The vehicle seat described in 5) is characterized in that the seat cushion has a cover at the bottom that surrounds the flap in the upright position so as to make it less visible from the outside than the flap in the prone position.

The present invention has the effect of maintaining high appearance quality and good usability for a long period of time.

FIG. 1 is a perspective view of a seat slide device 91 which is an example of a seat slide device according to an embodiment of the present invention. FIG. 2 is a partial perspective view showing the rail 1 provided in the seat slide device 91. As shown in FIG. FIG. 3 is a cross-sectional view taken along the line S3-S3 in FIG. FIG. 4 is an assembly diagram of the flap assembly 3A provided in the seat slide device 91. As shown in FIG. FIG. 5 is an assembly diagram showing the procedure for attaching the flap assembly 3A to the rail 1. As shown in FIG. FIG. 6 is a cross-sectional view of the seat slide device 9 and peripheral members mounted on a vehicle, taken along the line S6-S6 in FIG. FIG. 7 is a partial top view of the seat slide device 91. FIG. FIG. 8 is a left side view for explaining the standing state of the flap 3 in the seat slide device 91. As shown in FIG.

The seat slide device according to the embodiment of the present invention will be described using the seat slide device 91 as an example. For ease of explanation, the up, down, left, right, front and rear directions are defined as the directions indicated by arrows in FIG. 1.

First, an outline of the configuration of a seat slide device 91 will be described with reference to a perspective view of FIG.
The seat slide device 91 has a rail 1, a slider 2, and a plurality of flaps 3. Fig. 1 also shows a pair of front and rear end caps 4 attached to the end of the rail 1 by strong fitting.

The rail 1 is formed by extrusion of a metal, for example aluminum.
The rail 1 extends in the fore-and-aft direction (first direction) and has a rail base 12 that houses the slider 2 so that it can move back and forth in the fore-and-aft direction, and plate-shaped flange portions 11L, 11R that protrude to the left and right, respectively, from the lower edge of the rail base 12.

The slider 2 is housed within a rail base 12 and is movable in the front-rear direction within the rail base 12 by an externally applied force (see arrow DRa).
For example, when the seat slide device 91 is mounted on a vehicle, the slider 2 has an upper portion connected to a seat cushion 92 (see FIG. 8) serving as a vehicle seat, and moves back and forth together with the seat cushion 92 .

The flap 3 is a plate-like member having a mountain shape in a plan view. The multiple flaps 3 include multiple flaps 3L attached in a row on one side, i.e., the left side, of the upper end portion of the rail base 12 of the rail 1, and multiple flaps 3R arranged in a row on the other side, i.e., the right side.
In the rail 1, the group of flaps 3L and the group of flaps 3R are installed with the tops of the mountain shapes facing each other and shifted by half a pitch in the front-rear direction. Each flap 3 is installed so as to be elastically rotatable in the upright direction from a prone position in the natural state.
The group of flaps 3L and the group of flaps 3R are offset by half a pitch in the front-to-rear direction, so that when in the prone position, the peaks-valleys of one outer shape and the valleys-peaks of the other outer shape combine, leaving almost no gaps.

Each flap 3 rotates in the upright direction in association with the movement of the slider 2 to allow the slider 2 to pass, and automatically returns to the original prone position after the slider 2 has passed.
The end cap 4 is made of resin and is fitted onto the end of the rail 1 with a strong fit.

Each component will be described in detail.
First, the rail 1 will be described in detail with reference to Figures 2 and 3. Figure 2 is a partial perspective view of the rail 1, and Figure 3 is a cross-sectional view taken along the line S3-S3 in Figure 2.

The rail 1 is a molded product that is extruded symmetrically about a center line CL1 in the left-right direction, and then cut to a predetermined length in a secondary process. Notches 13c, 14c are alternately provided in the upper portion by machining.
As shown in Figure 3, the rail 1 has a rail base 12 having a cross-sectional shape formed into a roughly rectangular frame, and a flange portion 11L that protrudes in a plate-like shape to the left from the lower end of the rail base 12, and a flange portion 11R that protrudes in a plate-like shape to the right.
A plurality of through holes 11a are formed in each of the flange portions 11L and 11R.

The rail base 12 has a bottom 12a, a left side wall 12b extending upward from the left end of the bottom 12a via an inclined support portion 12b1, and a right side wall 12c extending upward from the right end thereof via an inclined support portion 12c1.
In addition, the rail base 12 has a flap support portion 13 extending upward and to the upper right from slightly above the center of the vertical direction of the left side wall 12b toward the center line CL1, and a flap support portion 14 extending upward and to the left from slightly above the center of the vertical direction of the right side wall 12c toward the center line CL1.
The rail base 12 also has a left side guard 12f and a right side guard 12g that protrude leftward and rightward from the upper ends of the left side wall 12b and the right side wall 12c, respectively.

A groove 12h is formed between the upper portion of the left side wall 12b and the flap support portion 13, the groove 12h being carved downward.
A groove 12i is formed between the upper portion of the right side wall 12c and the flap support portion 14, the groove 12i being carved downward.

The inclined support portion 12b1 and the inclined support portion 12c1 each have a surface that inclines to the left and right, respectively, so that they widen from each other as they extend upward.
The tip of the flap support portion 13 and the tip of the flap support portion 14 are spaced apart to form a slit 16 having a gap 15 therebetween.

At the connection portion between the left side wall 12b and the flap support portion 13, a recess 12b3 carved out toward the upper left and an upper restriction portion 12b2 having a flat surface in the left-right direction are formed.
At the connection portion between the right side wall 12c and the flap support portion 14, a recess 12c3 that is carved out toward the upper right and an upper restriction portion 12c2 that has a flat surface in the left-right direction are formed.

2, in the rail base 12, a portion of the flap support portion 13 in the extrusion molded product, which is a portion of the flap support portion 13 having a length L13c in the front-rear direction, is cut away in a secondary process to form a cutout portion 13c. A plurality of cutout portions 13c are repeatedly formed in the front-rear direction at a pitch Pa. The length of the remaining flap support portion 13 in the front-rear direction is defined as length L13.
That is, the rail 1 has flap support portions 13 each having a length L13 in the front-rear direction and cutout portions 13c each having a length L13c in the front-rear direction formed alternately at a pitch Pa.
The pitch Pa is the sum of the length L13 and the length L13c.

Similarly, in the rail base 12, a portion of the flap support portion 14 in the extrusion molded product, which is a portion of the flap support portion 14 having a length L14c in the front-rear direction, is cut away in a secondary process to form a cutout portion 14c. A plurality of cutout portions 14c are repeatedly formed in the front-rear direction at a pitch Pa. The length of the remaining flap support portion 14 in the front-rear direction is defined as length L14.
That is, the rail 1 has a plurality of flap support portions 14 each having a length L14 in the front-rear direction and a plurality of cutout portions 14c each having a length L14c in the front-rear direction, which are alternately formed at a pitch Pa.
The pitch Pa is also the sum of the length L14 and the length L14c.

Each of the cutouts 13c and each of the cutouts 14c are formed to be shifted from each other by a distance Pb which is half the pitch Pa in the front-rear direction.
The plurality of flap support portions 13 and the plurality of flap support portions 14 respectively have through holes 13a and through holes 14a that are concentric and have the same inner diameter.

Next, the flap assembly 3A including the flap 3 will be described in detail with reference to FIG.
As shown in FIG. 4, the flap assembly 3A includes a flap 3, two shafts 31, and a torsion coil spring 32.

The flap 3 is a resin molded product formed in a generally plate-like shape with front-to-rear symmetry. In a plan view, the flap 3 has a mountain-shaped base 3a that protrudes in a mountain shape, and extending portions 3b1 and 3b2 that extend coaxially forward and backward from the base of the mountain-shaped base 3a.
The mountain-shaped base 3a has a front edge 3af and a rear edge 3ar that approach each other from the extending portions 3b1, 3b2 toward the tip. The front edge 3af and the rear edge 3ar are inclined at an angle θ3a with respect to an axis CL3a that is parallel to an axis CL3 that extends in the front-rear direction and will be described later, forming a mountain-shaped shape. The angle θ3a is, for example, 45°.

In FIG. 3, the surface on the near side is the underside 3d of the flap 3 when the flap assembly 3A is attached to the rail 1 and in the prone position.
On the lower surface 3d, shaft support portions 3c1 and 3c2 are formed which are spaced apart from each other in the front-rear direction and protrude towards the front side of the page.
The shaft support portions 3c1, 3c2 have through holes 3c1a, 3c2a with the same inner diameter, each having a common axis CL3 extending in the front-rear direction.

The torsion coil spring 32 has a body 32c which is a compressible coil spring, a first arm 32a which extends radially outward as one end of the body 32c, and a second arm 32b which extends radially outward as the other end.

The shaft 31 has a base portion 31a, a flange 31b, and a spring engagement shaft portion 31c.
The base 31a is formed in a cylindrical shape with an outer diameter slightly smaller than the inner diameters of the through holes 3c1a and 3c2a. The flange 31b is formed at one end of the base 31a and has an outer diameter larger than both the inner diameter of the through hole 3c1a and the outer diameter of the torsion coil spring. The spring engagement shaft 31c is cylindrical with an outer diameter smaller than the inner diameter of the torsion coil spring 32 and can be inserted into the body 32c of the torsion coil spring 32.
The torsion coil spring 32 is formed so that its natural length is slightly smaller than the inside dimension of the flap 3 between the shaft support portions 3c1 and 3c2.

A method for assembling the flap assembly 3A will be described with reference to FIG.
First, the spring engagement shaft portions 31c of the two shafts 31 are inserted into the main bodies 32c of the torsion coil springs 32 so as to fit therein.
Next, the shafts 31 are pushed axially toward each other to compress the torsion coil springs 32, and while still in this compressed state, the base portions 31a of the shafts 31 are inserted from the inside into the through holes 3c1a, 3c2a of the axial support portions 3c1, 3c2 of the flap 3 (see arrows DRb).

This insertion action causes the pair of shafts 31 to move outward due to the elastic repulsive force of the compressive deformation of the torsion coil spring 32 until the flanges 31b abut against the opposing surfaces of the shaft supports 3c1 and 3c2. With the movement of the shafts 31 restricted, the bases 31a protrude outward from the shaft supports 3c1 and 3c2.

5, while pushing the base 31a of the shaft 31 closer to each other again (see arrow DRc) with respect to the flap assembly 3A, the shaft support portions 3c1, 3c2 are accommodated in the cutout portions 13c and 14c in the rail 1, and the pushing is released. At this time, the torsion coil spring 32 is twisted, and one of the first arm portion 32a and the second arm portion 32b abuts against the rail 1, and the other abuts against the flap 3, thereby urging the flap 3 to rotate in a direction to assume a prone position.
In this manner, the base 31a of the shaft 31 engages with the through holes 13a, 14a of the flap support parts 13, 14, and the multiple flap assemblies 3A are attached to the rail 1, respectively.

FIG. 6 is a cross-sectional view of the seat slide device 91 attached to a floor member 93 of a vehicle, taken at a position corresponding to S6-S6 in FIG.
The seat slide device 91 is fastened to the floor member 93 by means of bolts Bt1 which are inserted into the through holes 11a of the flange portions 11L and 11R.

As shown in FIG. 6, the slider 2 is formed symmetrically and has a main body 21 and a protrusion 22. The slider 2 is formed by extruding a metal such as iron with the front-to-rear direction as the extrusion direction, and then cutting the extrusion to a predetermined length in a secondary process to form the main body 21 and cutting it to a predetermined shape to form the protrusion 22.

The main body 21 has a pair of lower rollers 21b, 21b protruding downward. In a normal state, the pair of lower rollers 21b, 21b roll in contact with a pair of inclined support portions 12b1, 12c1 of the rail base 12, respectively. This allows the slider 2 to move smoothly in the front-rear direction inside the rail base 12.
The main body 21 has a pair of upper rollers 21c protruding upward on the left and right sides. When the seat cushion 92 integrated with the slider 2 is lifted upward for some reason, the upper rollers 21c abut against the upper regulating portions 12b2, 12c2 of the rail base 12 and roll, thereby regulating the upward movement of the slider 2 and supporting smooth forward and backward movement.

The main body 21 has protruding portions 21d, 21d at the upper left and upper right parts, which protrude to the upper left and upper right, respectively. Meanwhile, the rail base 12 of the rail 1 has recesses 12c3 carved outward in correspondence with the left and right protruding portions 21d, respectively.
As a result, when the slider 2 attempts to move excessively inside the rail base 12 in the left-right direction or diagonally upward direction, the protruding portion 21d abuts against the inner surface of the recess 12c3 to restrict the excessive movement.

The protruding portion 22 will be described with reference to Figures 1, 6 and 8. Figure 8 is a left side view of the seat slide device 91, showing the side shape of the protruding portion 22.
As shown in each drawing, the protrusion 22 has inclined edges 22b whose front and rear edges are inclined so as to approach each other as they extend upward.
The angle θc, which is the inclination angle of the inclined edge portion 22b with respect to the horizontal plane H, is, for example, 45°. This angle θc is not limited to 45°.

As shown in FIG. 8, the inclined edge 22b is distinguished into a front inclined edge 22bf and a rear inclined edge 22br.
The protruding portion 22 has a front cover 23f and a rear cover 23r. That is, the front cover 23f and the rear cover 23r made of a resin (such as POM) having excellent sliding properties are attached to the front inclined edge portion 22bf and the rear inclined edge portion 22br of the protruding portion 22 at the same angle θc along the inclination of the front inclined edge portion 22bf and the rear inclined edge portion 22br, respectively.

Through holes 22a are formed at the top of the protrusion 22, spaced apart in the front-rear direction. As shown in Figures 6 and 8, a bolt Bt2 is passed through the through hole 22a and screwed to a fixing member on the seat cushion 92 side. This integrates the slider 2 and the seat cushion 92.

Next, the rotation of the flap 3 will be described with reference to Figures 1, 5 to 7. Figure 7 is a partial top view of the flap assembly 3A attached to the rail 1.
As described above, the flap 3 is biased to rotate from the upright position to the prone position by the torsional repulsive force of the torsion coil spring 32. That is, the torsion coil spring 32 is a biasing member that biases the flap 3 to rotate.

As shown in Figures 5 and 6, the tip of flap 3L attached to the left cutout 13c abuts against the right flap support 14 when it rotates from the upright position to the prone position due to the torsional repulsive force of the torsion coil spring 32, restricting rotation beyond the prone position. Similarly, the tip of flap 3R attached to the right cutout 14c abuts against the left flap support 13 when it rotates from the upright position to the prone position due to the torsional repulsive force of the torsion coil spring 32, restricting rotation beyond the prone position.

When the rotation of the multiple flaps 3L and the multiple flaps 3R is restricted by the flap support parts 14 and 13, respectively, they cover the gaps 15 of the slits 16 in the rail base 12 and form an approximately flat surface.

When the slider 2 moves forward together with the seat cushion 92, the front cover 23f attached to the front edge 3af of the mountain-shaped base 3a abuts against the rear edge 3ar of the flap 3. When the slider 2 moves rearward, the rear cover 23r attached to the rear edge 3ar of the mountain-shaped base 3a abuts against the front edge 3af of the flap 3.

Here, the front edge of the front cover 23f attached to the front edge 3af of the mountain-shaped base 3a of the slider 2 and the rear edge of the rear cover 23r attached to the rear edge 3ar are inclined so as to approach each other as they go upward. In other words, the contact angle of at least one of the contact portions of the two contacting members (the flap 3 and the cover 23) is not 90° perpendicular to the front-rear direction, which is the relative movement direction of the two members, but is an inclined angle.
In addition, the rotational torque applied to the flap 3 in the upright position by the protrusion 22 that moves during normal seat sliding operation is set to be sufficiently larger than the rotational torque with which the torsion coil spring 32 biases the flap 3.

1 and 6, when the slider 2 moves back and forth, the front cover 23f or the rear cover 23r comes into contact with the rear edge 3ar or the front edge 3af of the mountain-shaped base 3a of the flap 3, respectively, so that the flap 3 is lifted and rotated in the direction of taking the upright posture (see arrow DRc in FIG. 6), allowing the protrusion 22 to pass through. In this state, the tip of the flap 3 comes into contact with and slides against the side surface of the protrusion 22 of the moving slider 2.
In addition, the flap 3 that was lifted by the protrusion 22 returns to its original prone position by the biasing force of the torsion coil spring 32 after the protrusion 22 has passed (see arrow DRd in FIG. 6).
The left and right ends of the flaps 3L and 3R in the prone position enter the grooves 12h and 12i, respectively, when the flaps 3L and 3R are rotated to the upright position, thereby allowing the rotation.

Furthermore, as shown in FIG. 7, the leading edge 3af and the trailing edge 3ar of the flap 3 are each inclined at an angle θ3a with respect to the axis CL3a shown in FIG.
As a result, the contact angle between the two contacting members (the flap 3 and the cover 23) is not 90 degrees perpendicular to the front-rear direction, which is the relative movement direction, but is an inclined angle. This allows the flap 3 to rotate in the upright position with less pushing force, and the operator can slide the seat cushion with less force. Therefore, the seat slide device 91 is easier to use.

As shown in FIG. 8, the seat cushion 92 to which the slider 2 is fixed is provided with an opaque leg cover 921 that encloses the lower part of the seat cushion 92 and the surrounding space including the slider 2 so as to make it invisible or difficult to see from the outside.
In detail, as the slider 2 moves, the flap 3 rotates by contact with the protrusion 22 to change posture, and all movements from the start of rotation toward the standing posture to the completion of returning to the prone posture are performed inside the leg cover 921.

This structure will now be described in detail.
7 and 8, the distance in the front-rear direction between the position P1 of the tip end on one edge (leading edge 3af) side of the flap 3 and the position P2 of the intersection with the center line CL12 of the other edge (rear edge 3ar) is defined as a distance L3d. Position P2 is the position on the flap 3 where the front cover 23f of the slider 2 advancing from the rear side abuts.

The distance L3d is set to be smaller than the front-rear distance L4 between the position P3 of the front end of the leg cover 921 shown in Figure 8 and the position P4 that coincides with the upper surface of the flap 3 in the vertical direction of the front cover 23f.
The relationship between the distance L3d and the distance L4 is the same on the rear end side of the leg cover 921.

As a result, the entire outer shape of each of the flaps 3 that the front cover 23 f and the rear cover 23 r abut and rotate is accommodated inside the leg cover 921 .
Therefore, the seat slide device 91 is in a state where the rotating flap 3 is not visible or is difficult to see from the outside when the flap 3 is in the prone position, thereby improving the appearance quality.

In addition, the gap 15 of the slit 16 exposed when the flap 3 rotates is always inside the leg cover 921, so that dirt and dust that tries to enter the gap 15 of the slit 16 from the outside is prevented from entering by the leg cover 921. As a result, the sliding operation of the seat slide device 91 is maintained well for a long period of time.

With the above-described configuration, the flaps 3L and 3R are in a horizontal position when they are in contact with the flap support portions 14 and 13, respectively.
The external dimensions and tolerances are set so that the gaps between each of the flaps 3 are very small, so that the flap 3 in the prone position effectively blocks the gap 15 of the slit 16 in the rail base 12 of the rail 1, making the gap 15 virtually invisible from the outside.

Flap 3 is made of hard resin, and its rotation from the prone position toward gap 15 is restricted by contact with flap supports 13 and 14 made of metal. Therefore, flap 3 will not substantially deform even if pressed by a hard, thin foreign object such as the heel of a high heel or the tip of an umbrella, and reliably prevents the foreign object from entering gap 15.

The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

The seat slide device 91 does not need to have the front cover 23f and the rear cover 23r, and the protrusion 22 may directly contact the flap 3.

The seat slide device 91 has, as the flaps 3, a row of flaps 3L and a row of flaps 3R arranged side by side in the front-rear direction on the left and right sides of the slit 16, respectively.
The seat slide device 91 is not limited to having two rows of flaps 3, and may have only one of the left and right rows. In this case, the shape of the flap 3 is a square or rectangular shape, not a tapered mountain shape. This allows the flap 3 to effectively close the slit 16 in the prone position, and to rotate to an upright position when it abuts against the inclined edge 22b of the slider 2, the front cover 23f, or the rear cover 23r, to allow the protrusion 22 to pass through.

1 Rail 11L, 11R Flange portion 12 Rail base 12a Bottom portion 12b Left side wall 12b1 Inclined support portion 12b2 Upper regulating portion 12b3 Relief portion 12c Right side wall 12c1 Inclined support portion 12c2 Upper regulating portion 12c3 Relief portion 12f Left side guard 12g Right side guard 12h, 12i Groove portion 13, 14 Flap support portion 13a, 14a Through hole 13c, 14c Cutout portion 15 Gap 16 Slit 2 Slider 21 Main body portion 21b Lower roller 21c Upper roller 21d Overhang portion 22 Protruding portion 22a Through hole 22b Inclined edge portion 22bf Front inclined edge portion 22br Rear inclined edge portion 23f Front cover 23r Rear cover 3, 3L, 3R Flap 3A Flap assembly 3a Angle 3d, L4 Distances L13, L13c, L14c, L14c Length Pa Pitch Pb Distances P1 to P4 Positions θc, θ3a Angle

Claims (6)

a rail extending in a first direction and having a slit extending in the first direction;
a slider that protrudes to the outside through the slit, has a protruding portion with both edges in the first direction that are inclined with respect to the first direction, and is engaged with the rail so as to be reciprocally movable in the first direction;
a plurality of plate -like flaps supported on the rail so as to be rotatable between a prone position that closes the slit and an upright position that allows the moving protrusion to pass through, the plate-like flaps being arranged side by side in the first direction;
a plurality of biasing members provided on the rail corresponding to each of the plurality of plate-shaped flaps, the biasing members rotatingly biasing each of the flaps toward the prone position;
Equipped with
a seat slide device characterized in that each of the flaps has both edges in the first direction inclined with respect to the first direction, the inclined edges abutting the inclined edges of the moving protrusion to rotate from the prone position to the upright position, and the protrusion passes and the abutment is released, returning from the upright position to the prone position. The seat slide device according to claim 1, characterized in that the rail has a flap support portion that restricts the flap from rotating beyond the prone position from the upright position. The seat slide device according to claim 1 or 2, characterized in that the multiple flaps are provided alternately on one side and the other side of the slit. The seat slide device according to any one of claims 1 to 3 , further comprising a cover attached to the inclined edge portion and abutting against the edge of the flap at the same inclination angle as the inclined edge portion . A seat slide device according to any one of claims 1 to 4,
a seat cushion connected to the protruding portion of the seat slide device;
A vehicle seat comprising: The vehicle seat according to claim 5, characterized in that the seat cushion has a cover at the bottom that encloses the flap in the upright position so that it is less visible from the outside than the flap in the prone position.

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