Seat slide device

Abstract

To provide a seat slide device for performing electric sliding and flip-up, which can avoid interference of a member around a seat in a flip-up operation of the seat even if a control failure occurs.SOLUTION: A seat slide device 1 includes: a lower rail 4 laid on the vehicle body in a posture extending in the front-rear direction; an upper rail 7 slidably engaged with the lower rail 4; a seat slide mechanism SK that electrically slides the upper rail 7 within a predetermined range; a seat ST attached to the upper rail 7; a seat flip-up mechanism HK that electrically changes the position of the seat ST between a seated position where the seat can be sat and a flip-up position where the rear side is flipped up and tilted forward; a controller for controlling the operation of the seat slide mechanism SK and the seat flip-up mechanism HK; and a stopper 43 provided on the lower rail 4, which restricts movement of the seat ST when the seat ST moves forward beyond the front end of the predetermined range in a seated position.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a seat slide device for a vehicle, and more particularly to a seat lift-up mechanism that slides the seat forward and lifts it up to place it in a forward-leaning position, making it easier for a user to enter the vehicle interior behind the seat. [Background technology]

[0002] A vehicle seat slide device allows the front-to-rear position of the seat to be adjusted by moving the upper rail of the seat back and forth on a lower rail laid on the floor to suit the user's body type, etc. Some seat slide devices are equipped with a seat flip-up mechanism that slides the seat forward and flips it up to a forward-leaning position, making it easier for the user to enter the vehicle interior behind the seat (hereinafter also referred to as walk-in).

[0003] A seat slide device such as the one described above is shown, for example, in Patent Document 1. The device described in Patent Document 1 restricts the seat from moving forward beyond a predetermined front end position when the seat is in a seated position that allows a user to sit on it, and releases the restriction when the seat is flipped up.

[0004] In this way, the seat flip-up mechanism can perform the flip-up operation by moving the seat to a preset position further forward than the front end position of the normal sliding range.

[0005] The seat lift-up mechanism not only enlarges the walk-in opening by tilting the seat forward, but also prevents interference between components on the seat side and components on the vehicle body located below the seat. Specifically, in addition to the lower rail, electronic components such as a wire harness or a controller box may be located on the vehicle body below the seat. The seat may also be equipped with a blower fan or heater that blows air to the occupant within the bottom of the seat cushion. In particular, in the case of an electric power seat that can be electrically operated to recline or perform other operations, the wiring harness and connectors are arranged around the seat, and these seat-related components are attached to the frame of the seat using brackets or the like.

[0006] Therefore, when an electric power seat is moved forward beyond its normal sliding range to a preset position, the seat is first flipped up before the movement beyond the sliding range takes place. This prevents interference between components arranged around the seat and components on the moving seat, preventing undesired malfunctions. Furthermore, components are arranged to improve layout efficiency, assuming no interference when the seat is flipped up. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6467207 Summary of the Invention [Problem to be solved by the invention]

[0008] An electric power seat mounted on a vehicle body is generally adjustable in terms of the seat's fore-and-aft position, reclining angle, seat height, fore-and-aft tilt, etc.

[0009] The operation of an electric power seat is controlled by a controller (controller) commonly referred to as an ECU (Electronic Control Unit). The controller constantly monitors the seat's slide position and other positional information input from an encoder or other device, and controls the operation based on the seat's position. Therefore, it is possible that a control malfunction may occur, causing the controller to incorrectly determine the seat position due to a momentary or short-term power outage. In this scenario, when the seat is flipped up, the controller may incorrectly determine the seat's position and move it beyond the slide range without actually flipping it up. Therefore, a technology is needed to prevent component interference when a control malfunction occurs.

[0010] Therefore, an object of the present invention is to provide a seat slide device that performs electric sliding and lifting, and that can avoid interference with components around the seat during the seat lifting operation even if a control malfunction occurs. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems, one aspect of an embodiment of the present invention has the following configuration. 1) Lower rails laid on the car body in a position extending forward and backward; an upper rail slidably engaged with the lower rail; a seat slide mechanism that electrically slides the upper rail within a predetermined range; a seat attached to the upper rail; a seat flip-up mechanism that electrically changes the position of the seat between a seated position where the seat can be sat on and a flip-up position where the seat is tilted forward by flipping up the rear side; a controller for controlling the operation of the seat slide mechanism and the seat flip-up mechanism; a stopper provided on the lower rail for restricting movement of the seat when the seat moves forward beyond the front end of the predetermined range in the seated position; The seat slide device is provided with: 2) The seat flip-up mechanism includes a rear link that rotates when the seat is changed between the seated position and the flip-up position and has a contact piece that is formed in a shape that protrudes downward when the seat is in the seated position, The seat slide device described in 1) is such that the abutment piece is in a position where it interferes with the stopper when the seat slides in the seated position, and in a position where it does not interfere with the stopper when the seat slides in the flip-up position. 3) The stopper is allowed to rotate in only one direction and stands upright, and has a rotating piece that the contact piece abuts against when the seat slides in the seated position, The seat slide device described in 2) is such that the rotating piece is prohibited from rotating in a first direction, which results in a forward tilt, when the contact piece abuts from the rear side, and is allowed to rotate in a second direction, which results in a backward tilt, when the contact piece abuts from the front side. [Effects of the Invention]

[0012] According to one aspect of the seat slide device of the present invention, even if the device is inoperable due to a power outage or an unexpected control malfunction occurs, interference with components around the seat can be avoided during the seat flip-up operation. [Brief explanation of the drawings]

[0013] [Figure 1A] FIG. 1A is a perspective view showing a framework configuration of a seat ST equipped with a seat slide device 1 according to one aspect of an embodiment of the present invention. [Figure 1B] FIG. 1B is a block diagram of the seat slide device 1. As shown in FIG. [Figure 2] FIG. 2 is a side view showing a first mode of operation of the seat slide device 1. As shown in FIG. [Figure 3] FIG. 3 is a side view showing a second mode of operation of the seat slide device 1. As shown in FIG. [Figure 4] FIG. 4 is a side view showing a third mode of operation of the seat slide device 1. As shown in FIG. [Figure 5] FIG. 5 is a side view showing a fourth mode of operation of the seat slide device 1. As shown in FIG. [Figure 6A]FIG. 6A is a side view showing a first mode of a modified stopper 43a. [Figure 6B] FIG. 6B is a side view showing a second mode of the stopper 43a. DETAILED DESCRIPTION OF THE INVENTION

[0014] A seat slide device 1 according to one embodiment of the present invention will be described with reference to FIGS. 1A to 5. In the drawings described below, identical or similar parts are designated by identical or similar reference numerals. However, it should be noted that the drawings are schematic and may differ from the actual product. Furthermore, the embodiment described below exemplifies a device and method for embodying the technical idea, and does not specify the material, shape, structure, arrangement, etc. of each component part. Various modifications can be made to this embodiment within the scope of the claims. In the following description, the up, down, front, back, left, and right directions are defined as U, D, F, B, L, and R by arrows in FIG. 1A.

[0015] The configuration of the seat slide device 1 will be described with reference to Figures 1A and 1B. Figure 1A is a perspective view showing the skeleton configuration of a seat ST equipped with the seat slide device 1. Figure 1B is a block diagram of the seat slide device 1. As shown in Figure 1A, the seat frame 2 includes a frame-shaped seat cushion frame 3 which is the skeleton of the seat cushion in the seat ST, and a seat back frame 5 which is the skeleton of the seat back connected near the rear end thereof so as to be able to tilt freely as shown by arrow DR1 around an axis CL2 extending laterally.

[0016] The seat cushion frame 3 is formed in a frame shape and includes a pair of left and right side frames 31, 32, a front bar 30F connecting the side frames 31, 32 at their front ends, and a rear bar 30R connecting the side frames 31, 32 at their rear ends. The seatback frame 5 includes baseback frames 51, 52 connected to the rear ends of the side frames 31, 32, respectively. The baseback frames 51, 52 are connected at their upper parts to a backrest frame (not shown) to form an integrated inverted U-shaped frame body. Since Figure 1 shows the skeletal structure, the outlines of the seat cushion and seatback are omitted.

[0017] A pair of lower rails 4 are laid on the floor FL of the vehicle, extending front to back and spaced apart on the left and right. An upper rail 7 is engaged with each lower rail 4, and the upper rail 7 is electrically slid back and forth relative to the lower rail 4 via a rack and pinion mechanism RP by the operation of a slide motor 8.

[0018] An upwardly protruding foot rest 61 is attached to each of the pair of upper rails 7. One end of a front link 33 is rotatably connected to axles 611 formed on the front ends of the pair of foot rests 61. The other end of each front link 33 is rotatably connected to axles 311, 321 formed on the front parts of the side frames 31, 32 of the seat cushion frame 3. The pair of front links 33 are connected at their middle parts by a front link bar 34 extending in the left-right direction, and the pair of front links 33 are configured to rotate synchronously around the axles 611.

[0019] Shafts 312 and 322 are formed on the side frames 31 and 32 at positions slightly rearward from the center in the front-to-rear direction, and one end of the rear link 91 is rotatably connected to each of the shafts 312 and 322. The other end of the rear link 91 is rotatably connected to a shaft 622 formed on the rear of the foot stand 61. The rear link 91 is longer than the front link 33 .

[0020] Downwardly protruding legs 313, 323 are formed at the rear of the side frames 31, 32. The legs 313, 323 have hook plates (not shown), and are electrically engaged with and disengaged from an inverted U-shaped engaging pipe (not shown) provided on the upper rail 7 side by the operation of an actuator 93 (see FIG. 1B).

[0021] The seat frame 2 has a motor 92 for lifting up. The front link bar 34 is connected to the drive shaft of the motor 92 and moves in the front-rear direction by the operation of the motor 92. As shown in FIG. 1B, the operation of the actuator 93 and the motors 8 and 92 is controlled by a controller 10, and the encoder signals of the motors 8 and 92 are fed back to the controller 10. This allows the controller 10 to grasp the operating status of the seat ST, such as the slide position and lift-up angle, in real time. The motor 92, the front link 33, and the front link bar 34 constitute a seat lift-up mechanism HK (see FIG. 1A).

[0022] In the above-described configuration, the seat ST is flipped up as follows. First, the user presses a flip-up button 11 (see FIG. 1B) located somewhere on the seat ST (such as the shoulder position of the seat back). This causes the controller 10 to operate the actuator 93 to unlock the legs 313, 323 from the upper rail 7, and to operate the motor 92. This causes the front link 33 to rotate clockwise in FIG. 1A, and the side frames 31, 32 to move forward. Here, because the rear link 91 is longer than the front link 33, the forward movement of the side frames 31, 32 causes the seat cushion frame 3 to assume a so-called flip-up position, in which the rear side is lifted and tilted forward, as shown in FIG. 5.

[0023] In contrast to this flip-up position, the position of the seat ST in which the flip-up operation is not performed and which is available for sitting and which is shown in FIGS. 1A and 1B to 4 is also referred to as a seated position.

[0024] In this way, the base 61 supporting the seat cushion frame 3 is fixed to the upper rail 7 and slides on the lower rail 4 that constitutes the slide rail SL integrally with the upper rail 7. A pair of lower rails 4 are installed spaced apart on the left and right and extend in the fore-and-aft direction of the vehicle body. The front end of the lower rail 4 is attached to the vehicle body floor FL by a bracket 41, and the rear end is attached to the vehicle body floor FL by a bracket (not shown). The left lower rail 4 is also slidably engaged with the upper rail 7, which is indirectly connected to the seat cushion frame 3. In addition, a contact piece 912 that extends downward in the seated position is formed on the front lower edge of the rear link 91.

[0025] The seat ST is an electrically powered seat and has a seat slide device 1. The seat slide device 1 includes a motor 8 for sliding and a motor 92 for lifting up the seat ST, a seat slide mechanism SK for electrically sliding the seat ST, a seat lift-up mechanism HK for lifting up the seat ST, and a controller 10 (see FIG. 1B) for controlling the operation of the seat slide mechanism SK and the seat lift-up mechanism HK. The seat slide mechanism SK electrically slides the seat ST within a predetermined sliding range. The seat lift-up mechanism HK electrically changes the position of the seat ST between a seated position and a lift-up position.

[0026] That is, under the control of the controller 10, the seat ST having the seat frame 2 can slide back and forth relative to the lower rails 4 via a rack-and-pinion mechanism RP (see FIG. 1A) by the power of the motor 8, and can be lifted up by the power of the motor 92. The motor 8 and the rack-and-pinion mechanism RP form a seat slide mechanism SK (see FIG. 1A).

[0027] In addition to the sliding and flip-up movements, the seat ST may be adjustable in terms of the reclining angle of the seat back, the height of the seat cushion, the tilt angle of the seat in the front-to-rear direction, etc. These adjustment movements are realized by the controller 10 controlling the driving of drive elements such as motors, gears, and links (not shown).

[0028] Fig. 1A shows a state in which the seat ST is near the rear end of the lower rail 4, i.e., a state in which the seat ST is lowered to the rearmost position in the sliding range. Figs. 2 to 5 are side views showing first to fourth modes in the operation of the seat slide device 1. In Figs. 2 to 5, in order to avoid complication of the drawings, the seat back frame 5, the locking mechanism provided on the upper rail 7 side for cooperating with each other to lock and unlock the leg portion 323, the front link 33, etc. are omitted.

[0029] 2 shows the state in which the seat ST is at the rear end position of the sliding range, as in FIG. 1A; FIG. 3 shows the state in which the seat ST is at the front end position of the sliding range; FIG. 4 shows the state in which the seat ST is at the mechanical stop position (details will be described later); and FIG. 5 shows the state in which the seat ST has been flipped up by a walk-in operation.

[0030] 1A, 2, and 3, the rearmost and frontmost positions of the electrically operated sliding range of the seat ST are defined as follows. First, the reference point for the front-to-rear position of the seat ST is the position of the front edge 912a extending vertically of the contact piece 912 when the seat ST is in the seated position. The contact piece 912 is a downwardly extending portion formed on the rear link 91 that slides integrally with the seat cushion frame 3.

[0031] The front-rear direction position of the front edge 912a when the front edge 912a is at the rear end of the electrically operated sliding range of the seat ST is defined as position P1. That is, in FIGS. 1A and 2, the front edge 912a is at position P1. In FIG. 3, the front edge 912a is at position P2, the foremost position of the electrically operated sliding range of the seat ST. The front-rear direction distance L1 between positions P1 and P2 is, for example, 140 mm. That is, the electrically operated sliding range is 140 mm. Positions P1 and P2 are positions where the sliding stops under the control of the controller 10, and are hereinafter also referred to as software stop positions.

[0032] As shown in FIG. 2, the front bracket 41, which secures the lower rail 4 to the floor FL, has an extension 411 extending rearward. The rear end of the extension 411 serves as a stopper 43 having a restriction surface 432 extending in the up-down and left-right directions. The restriction surface 432 is positioned to interfere with a stop piece 912 of the seat ST, which slides in the front-rear direction. Specifically, the front edge 912a of the stop piece 912 is positioned to abut against the restriction surface 432 when the seat ST moves forward. If the position of the restriction surface 432 in the front-rear direction is designated as position P3, as shown in FIG. 2, the distance L2 between positions P1 and P3 is set to be greater than the distance L1 shown in FIG. 3, e.g., 145 mm. That is, position P3 is located forward of position P2, which is the software stop position of the front end of the power slide. Specifically, the stopper 43 is positioned so that the restriction surface 432 is located 5 mm forward of position P2.

[0033] When the seat ST is electrically slid, the controller 10 grasps the position of the seat ST in the front-to-rear direction based on an encoder signal fed back from the sliding motor 8, calculates the number of pulses required to move the seat ST to the next position, and supplies that signal to the motor 8. Therefore, unless the power supply for the controller 10 and other components is normal and external disturbances or other factors make it impossible to control the controller 10, the seat ST is controlled by the controller 10 to slide correctly within the range of distance L1.

[0034] The seat slide device 1 has a slide button (not shown) and a walk-in button 11 (hereinafter referred to as button 11; see Figure 1B) installed on the seat back or the like, and when the user presses the slide button, the seat ST performs a sliding operation, and when the user presses button 11, the seat ST performs a walk-in operation accompanied by a sliding operation.

[0035] More specifically, when a user walks in, he or she first presses a walk-in button 11 (see FIG. 1B) provided on the seat back or the like. An ON signal is output when the button 11 is pressed, and this signal is input to the controller 10. In response to this ON signal, the controller 10 controls the operation of the sliding motor 8 and the flip-up motor 92 to electrically move the seat ST from the rear end position of the sliding range shown in FIG. 2 to the front end position shown in FIG. 3, and then performs the flip-up operation shown in FIG. 5.

[0036] The lifting operation of the seat ST may be performed after the seat ST reaches the foremost position P3, or may be performed in parallel with the sliding operation from a predetermined position before the seat ST reaches the foremost position P3 in the seated posture as shown in Fig. 3. In this case, the lifting operation may be performed from the point when the forward sliding movement in the walk-in operation starts.

[0037] As described above, the seat slide device 1 has the stopper 43 at a position P3 on the lower rail 4, which is forward of the position P2 at the front end of the predetermined sliding range of the electric power slide. When the seat ST moves forward past the position P2 while in the seated position due to a control malfunction, the stopper 43 comes into contact with the abutment piece 912 formed on the rear link 91, thereby preventing the seat ST from moving further forward.

[0038] As described above, the seat slide device 1 has the abutment piece 912 formed on the rear link 91, and the abutment piece 912 is located in a position where it interferes with the stopper 43 in the front-rear direction. However, when the controller 10 is controlling the seat slide mechanism SK and the seat flip-up mechanism HK normally, the seat ST is controlled so that the rear portion thereof is flipped up at a predetermined slide position as shown in FIG. 5. Accordingly, the rear link 91 rotates from the prone position to an upright position, and the abutment piece 912 formed on the rear link 91 moves to a position where it passes above the stopper 43. Therefore, when the seat ST slides forward, the abutment piece 912 does not interfere with the stopper 43, and the seat ST is allowed to move forward of position P3.

[0039] In this way, when the seat ST is not flipped up and moves forward beyond a predetermined sliding range, the stopper 43 mechanically stops the forward movement of the seat ST.

[0040] This prevents the problem of parts on the lower side of the seat ST getting caught or interfering with parts on the vehicle body side, which can occur when the seat ST moves forward in a seated position that is not jumped up due to a power outage or an inability to control the controller 10 due to an unexpected cause.

[0041] The seat slide device 1 can realize the above-mentioned mechanical stop structure with a simple configuration in which the rear link 91 is provided with the abutment piece 912 as a protrusion and the bracket 41 of the lower rail 4 is formed with the stopper 43 .

[0042] (Variation) 6A and 6B are partially enlarged perspective views respectively showing the configuration and operation of a stopper 43a which is a modified example of the stopper 43 of the seat slide device 1. As a modified example of the seat slide device 1, a seat slide device 1a is provided with a stopper 43a instead of the stopper 43. In the seat slide device 1a, parts corresponding to those of the above-described seat slide device 1 are designated by the same reference numerals, and their description will be omitted. The stopper 43a includes a base 43a1, a pivot piece 43a2, restricting parts 43a3 and 43a4, a biasing member 43a5, and locking parts 43a6 and 43a7.

[0043] The base 43a1 of the stopper 43a is fixed to the rear end of the extension 411 of the bracket 41 by a fastener N1 such as a bolt. A shaft 433 is provided at the rear of the base 43a1, and the pivot piece 43a2 is supported on the shaft 433 so as to be rotatable about an axis CL43a extending in the left-right direction. The restricting portion 43a3 extends upward from the upper edge of the base 43a1 and is bent to the right (toward the depth of the paper). The restricting portion 43a4 extends diagonally downward and rearward from a lower rear corner of the base 43a1. The locking portion 43a6 is bent to the left (forward in the paper) at the front of the base 43a1 and has a through-hole formed therein. The pivot piece 43a2 is a plate-like member whose lower front portion is rotatably connected to the shaft portion 433 and extends in the up-down and front-rear directions, and whose rear edge is bent to the left to form a locking portion 43a7 with a through hole formed therein.

[0044] The rotating piece 43a2 is allowed to rotate counterclockwise around the axis CL43a in one direction (second direction) in FIG. 6A and tilts backward. When the rotating piece 43a2 rotates in the opposite clockwise direction (first direction), the rotation is restricted by the restricting portion 43a3. In the restricted state, the rotating piece 43a2 assumes an upright position in which the rear surface of the locking portion 43a7 extends in the vertical direction, as shown in FIG. 6A. Furthermore, when the rotating piece 43a2 rotates excessively counterclockwise, the rotation is restricted by the restricting portion 43a4. Arms at both ends of the biasing member 43a5, which is a compression coil spring, are engaged with the through-holes of the locking portion 43a7 and the locking portion 43a6, respectively. The rotating piece 43a2 is biased clockwise by the biasing member 43a5, and maintains the position shown in FIG. 6A in its natural state.

[0045] If, due to a control malfunction, the seat ST does not stop at position P2, which is the software stop position, while remaining in a seated position without any flip-up operation, and attempts to move forward beyond position P2, the contact piece 912 will come into contact with the rear surface of the engaging portion 43a7 of the rotating piece 43a2 of the stopper 43a, causing the seat ST to stop.

[0046] Let us assume that the seat ST normally flips up and passes position P2, moving forward, but then a control malfunction occurs, causing the seat ST to move from the flipped-up state to a seated state. In this case, even if the seat ST slides rearward from a position forward of position P2 to pass position P2, the stopper 43 of the seat slide device 1 prevents the seat ST from moving to a position where an occupant can sit. However, when the pivot piece 43a2 of the stopper 43a of the seat slide device 1a is pressed forward from the rear side to apply a reverse torque exceeding the clockwise biasing torque of the biasing member 43a5 (see arrow DR61), the pivot piece 43a2 rotates counterclockwise (see arrow DR62). Therefore, the abutment piece 912 passes through the stopper 43a while tilting it, allowing the seat ST to move rearward. This allows at least the seat ST to move to a position where an occupant can sit.

[0047] As described above, the stopper 43 of the seat slide device 1 protrudes so as to enter the movement path of the abutment piece 912 provided on the rear link 91. This mechanically prevents the seat ST from moving forward beyond position P2 while in the seated position. However, after the controller 10 successfully electrically flips up the seat ST past position P2, there is a possibility that a malfunction due to a control problem will occur and the seat ST will return to the seated position. In this case, when the controller 10 moves the seat ST rearward in the seated position, the abutment piece 912 of the stopper 43 will hit it from the front, preventing the seat ST from returning (lowering).

[0048] In contrast to this, in the seat slide device 1a of the modified example, the stopper 43a is configured as described above, and when the abutment piece 912 abuts against it from the front, it rotates to move out of the movement path of the abutment piece 912, allowing the rearward movement of the abutment piece 912. The locking portion 43a7 and the biasing member 43a5 are disposed in front of the pivoting piece 43a2, at a position shifted to the left from the movement path of the abutment piece 912, and therefore do not affect the movement of the abutment piece 912.

[0049] In this way, the seat slide device 1a equipped with the stopper 43a allows the seat ST to move from a region forward of the slide range to within the slide range while being moved backward in a seated position, even if a malfunction occurs in the control of the controller 10 during the flip-up operation, so that the seat ST can be moved to the seated position. [Explanation of symbols]

[0050] 1,1a Seat slide device 10 Controllers 11 Button 2 seat frames 3 Seat cushion frame 30F Front Bar 30R rear bar 31,32 Side frame 311,321,312,322 Shaft 313,323 Legs 33 Previous Link 34 Previous Link Bar 4. Royal Rail 41,42 Bracket 411 Extension 432 Regulatory aspects 43,43a Stopper 43a1 base 43a2 Rotating piece 43a3,43a4 Regulation Department 43a5 Biasing member 43a6,43a7 Locking part 433 Shaft 5 Seat back frame 51,52 base back frame 61 pedestal 611,622 Shaft 7 Upper Rail 8 (slide) motor 91 Next Link 912 Pad 912a leading edge 92 (for lifting) motor 93 Actuator CL2, CL43a axis line FL floor HK seat lift mechanism L1,L2 distance N1 Fixture P1,P2,P3 position RP rack and pinion mechanism SK seat slide mechanism SL slide rail ST seat

Claims

1. The lower rails are laid on the car body in a position that extends forward and backward, an upper rail slidably engaged with the lower rail; a seat slide mechanism that electrically slides the upper rail within a predetermined range; a seat attached to the upper rail; a seat flip-up mechanism that electrically changes the position of the seat between a seated position where the seat can be sat on and a flip-up position where the seat is tilted forward by flipping up the rear side; a controller for controlling the operation of the seat slide mechanism and the seat flip-up mechanism; a stopper provided on the lower rail for restricting movement of the seat when the seat moves forward beyond the front end of the predetermined range in the seated position; A seat slide device comprising:

2. the seat flip-up mechanism includes a rear link that rotates when the seat is changed between the seated position and the flip-up position and has a contact piece that is formed in a shape that protrudes downward when the seat is in the seated position, 2. The seat slide device according to claim 1, wherein the abutment piece is positioned so as to interfere with the stopper when the seat is slid in the seated position, and is positioned so as not to interfere with the stopper when the seat is slid in the flip-up position.

3. the stopper is allowed to rotate in only one direction and stands up, and has a rotating piece with which the contact piece abuts when the seat slides in the seated position, 3. The seat slide device according to claim 2, wherein the pivot piece is prohibited from pivoting in a first direction in which the abutment piece tilts forward when the abutment piece contacts the seat from the rear side, and is permitted to pivot in a second direction in which the abutment piece tilts backward when the abutment piece contacts the seat from the front side.

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