JP2019104346A - Seat assembly - Google Patents

Abstract

To provide a seat assembly that is superb in maneuverability.SOLUTION: Included are a stopper 111 disposed on the side of a lower rail and made movable to an abutting enabling position, at which the stopper can abut against a rear end of an upper rail, or an abutting disabling position at which the stopper cannot abut against the rear end, and a turnover spring 115 that constrains the stopper in the direction of the abutting enabling position when the stopper 111 is located at the position at which the stopper can abut against the rear end of the upper rail, or constrains the stopper in the direction of the abutting disabling position when the stopper 111 is located at the position at which the stopper cannot abut against the rear end of the upper rail.SELECTED DRAWING: Figure 11

Description

  The present invention comprises a seat having a seat back for supporting the back of a seated person, a lower rail provided on the floor side, and a slide rail formed of an upper rail movably engaged with the lower rail and provided with the seat. It relates to a sheet device.

As a seat device provided in a vehicle, a seat device that can slide further beyond the normal sliding range has been proposed. In the present specification, a normal slide area is referred to as a normal slide area, and a slide area beyond the normal slide area is referred to as a long slide area.
In such a sheet device, a stopper capable of coming into contact with the upper rail is provided, and normally, the seat is slid in the slide area, and the sheet can be slid to the long slide area by retracting the stopper. (See Patent Document 1).

Patent No. 5073320 gazette

  However, in the seat device described in Patent Document 1, the stopper is always biased by the biasing member in the direction in which it abuts on the upper rail, and regulates the seat slide to the long slide region. To release this restriction, the stopper is manually moved against the biasing force of the biasing member. That is, while the sheet can be slid to the long slide region, it is necessary to manually move the stopper against the biasing force of the biasing member manually, which causes a problem of poor operability.

  The present invention is made in view of the above-mentioned subject, and the subject is to provide a sheet device with good operativity.

  In order to realize at least one of the above-mentioned problems, a seat device reflecting one aspect of the present invention includes a seat having a seat back for supporting the back of a seated person, a lower rail provided on the floor side, and the lower rail A slide rail comprising an upper rail on which the seat is provided movably engaged with the seat, the seat device being provided on either side of the lower rail or the upper rail, either the lower rail or the upper rail A position allowing contact with the other, a stopper movably provided to a position not allowing contact, and a direction toward the contactable position when the stopper is in the position allowing contact with the other, Turnover sleeve biased toward the non-contacting position when the stopper is in the non-contacting position with the other And having a ring, the slide stopper mechanism composed of.

  Other features of the present invention will become more apparent from the modes for carrying out the invention described below and the accompanying drawings.

  According to the seat device of the present invention, the seat device is provided on either one side of the lower rail or the upper rail, and movably provided at a position allowing contact with either the lower rail or the upper rail and a non-contacting position. When the stopper is in the position where it can contact with the other stopper, and when the stopper is in the contact impossible position with the other stopper, the contact can not be made If the stopper moves to a position where it can or can not abut on the rear end of the upper rail, by having a slide stopper mechanism consisting of a turnover spring that biases toward the proper position direction, the turnover spring When the stopper is in the contactable position direction, the stopper is in contact with the other It is biased the the abutment impossible position direction when in a impossible position.

Therefore, it is not necessary to continue moving the stopper against the biasing force of the biasing member manually, and the operability is good.
Other effects of the present invention will become more apparent from the modes for carrying out the invention described below and the attached drawings.

It is an exploded perspective view of a lock release device. It is F direction arrow line view of FIG. 1, Comprising: It is a figure which shows the state which the control lever is not operated at the time of parking. It is an R direction arrow line view of Drawing 1, and is a figure showing the state where the control lever is not operated at the time of parking. It is F direction arrow line view of FIG. 1, Comprising: It is a figure which shows the state in which the control lever is operated at the time of parking. It is an R direction arrow line view of FIG. 1, and is a figure which shows the state in which the control lever is operated at the time of parking. It is F direction arrow line view of FIG. 1, Comprising: It is a figure which shows the state which the control lever is not operated except at the time of parking. It is an R direction arrow line view of FIG. 1, and is a figure showing the state where the control lever is not operated except at the time of parking. It is F direction arrow line view of FIG. 1, Comprising: The figure which shows the state in which the control lever is operated except at the time of parking. FIG. 10 is a view taken in the direction of the arrow R in FIG. 1, showing a state in which the control lever is operated except during parking; It is a block diagram explaining the electric constitution of a lock release device. It is an exploded perspective view of a slide stopper mechanism. It is F direction arrow line view of FIG. 11, Comprising: It is a figure which shows the state at the time of parking. It is an R direction arrow line view of FIG. 11, and is a figure which shows the state at the time of parking. It is F direction arrow directional view of FIG. 11, Comprising: It is a figure which shows the state except the time of parking. It is an R direction arrow line view of FIG. 11, and is a figure which shows the state except the time of parking. It is a block diagram which shows the whole structure of the sheet | seat apparatus of embodiment.

Embodiments will be described using the drawings.
First, the overall configuration of the sheet device of the present embodiment will be described with reference to FIG. FIG. 16 is a block diagram showing the overall configuration of the seat apparatus of the present embodiment.
In the figure, the seat 1 comprises a seat cushion 3 for supporting the buttocks of a seated person, and a seat back 5 provided so as to be capable of forward / backward tilting relative to the seat cushion 3 and for supporting the back of the seated person.

  On the floor F, a pair of upper rails (outer lower rails (outer lower rail provided outside the vehicle, inner lower rails provided inside the vehicle) 7 and movably engaged with the lower rails 7 and a pair of upper rails (outer A pair of slide rails (outer slide rail, inner slide rail) 11 consisting of lower rails, inner lower rails 9 are provided.

Further, each slide rail 11 is provided with a seat slide lock device (an outer slide lock device, an inner slide lock device) 13 for locking / unlocking the movement of the upper rail 9.
The seat slide lock device is normally in a locked state in which the movement of the upper rail 9 is prohibited by the biasing force of a spring or the like.

Further, in the seat apparatus of the present embodiment, the seat back 5 positioned behind the seat 1 is provided with the lock release apparatus 21 for unlocking the seat slide lock apparatus 13 and the handle 22 of the lock release apparatus 21. .
Further, the sheet device of the present embodiment is a sheet device which can slide to the long slide area LS further beyond the normal slide range NS. The seat slide rail 11 is provided with a slide stopper mechanism 101 having a stopper that can abut against the upper rail 9. Usually, the seat slide is normally a seat slide in the slide area NS, and the stopper of the slide stopper mechanism 101 is retracted. The seat can be slid to the slide area LS.
(Lock release device 21)
The unlocking device 21 will be described with reference to FIGS. 1 is an exploded perspective view of the unlocking device, FIG. 2 is a view taken in the direction of arrow F in FIG. 1, showing the state where the operation lever is not operated at the time of parking, FIG. 3 is the arrow R in FIG. FIG. 4 is a view showing a state in which the operation lever is not operated at the time of parking, and FIG. 4 is a view taken in the direction of arrow F in FIG. 1 showing a state in which the operation lever is operated at the time of parking 5 is a view taken in the direction of arrow R in FIG. 1 and shows the state in which the operation lever is operated at the time of parking, and FIG. 6 is a view taken in the direction of arrow F in FIG. FIG. 7 is a view taken in the direction of the arrow R in FIG. 1, showing the state in which the operation lever is not operated except at the time of parking, FIG. FIG. 9 is a view taken in the direction of the arrow, showing a state in which the operation lever is operated other than during parking; FIG. 9 is a view taken in the direction of the arrow R in FIG. It shows a state where the operation lever is operated outside, FIG. 10 is a block diagram illustrating an electrical configuration of the unlocking device.

First, the unlocking device 21 will be described with reference to FIG.
A motor 27 is attached to the back surface of the base 23 using two screws 25 that pass through two holes 23 a provided in the base 23. An elongated hole 28 a is formed on the rotating end of the arm 28 provided on the output shaft of the motor 27.

Further, two holes 23 b for attaching to the frame of the seat back 5 are formed in the base 23, and square nuts 29 are welded to the holes 23 b.
The base 23 is formed with grooves 23c, 23d, and 23e for locking three outer cables.

A cable 31 consisting of an inner cable 31a and an outer cable 31b covering the inner cable 31a transmits the movement of the handle 22 to a lever described later, and the outer cable 31b is engaged with the groove 23c.
A cable 33 consisting of an inner cable 33a and an outer cable 33b covering the inner cable 33a transmits the movement of a link to be described later to one of the two seat slide lock devices (outer seat slide lock device) 13. The outer cable 33b is engaged with the groove 23d.

  The cable 35 comprising the inner cable 35a and the outer cable 35b covering the inner cable 35a transmits the movement of the link described later to the other seat slide lock device (inner seat slide lock device) 13 of the two seat slide lock devices. The outer cable 35b is engaged with the groove 23e.

  The lever 39 and the link 41 are disposed on the surface of the base 23 so as to overlap with each other, and the hole 39a formed in the lever 39, the hole 41a formed in the link 41, and the hole 23f formed in the base 23 The lever 39 and the link 41 are respectively provided rotatably with respect to the base 23 around the pin 37 by using the pin 37 fitted to the.

A cut and raised portion 41 b is formed on the link 41, and a linearly extending groove 43 a of the slide member (moving member) 43 is engaged with the cut and raised portion 41 b. Therefore, the slide member 43 is provided to be linearly movable with respect to the link 41.
Spring locking portion 23g formed by winding the middle portion to the pin 37 and forming one end of the base 23
The link 41 is a stopper portion in the vicinity of the groove 23d of the base 23 (a standing wall surface in the vicinity of the groove 23d) by the torsion spring 45 whose other end is locked to the spring locking portion 41c formed on the link 41 ) 23h is biased in the direction of contact.

The lever 39 is formed with a groove 39 d to which the inner cable 31 a of the cable 31 is connected.
The link 41 is formed with a hole 41 d to which the inner cable 33 a of the cable 33 is connected and a hole 41 e to which the inner cable 35 a of the cable 35 is connected. Then, when it rotates against the urging force of the torsion spring 45, the inner cable 33a of the cable 33 and the inner cable 35a of the cable 35 are pulled, and two seat slide lock devices (outer seat slide lock device, inner seat slide lock device ) 13 is to be unlocked.

  The slide member 43 is formed with an abutted portion 43 b which can abut on the abutted portion 39 b of the lever 39. The slide member 43 has a position where the abutted portion 43b can abut against the abutment portion 39b of the lever 39 (see FIGS. 2 and 4) and a position where the abutted portion 43b can not abut (see FIGS. 6 and 8) It is possible to move to and.

  The slide member 43 is formed with a projection 43 c (see FIGS. 3, 5, 7, and 9) fitted in the long hole 28 a of the arm 28 rotationally driven by the motor 27. Therefore, when the arm 28 rotates in the forward or reverse direction, the slide member 43 moves to a position where the abutted portion 43 b can abut on the abutted portion 39 b of the lever 39 and a position in which the abutted portion 43 b can not abut.

Therefore, the drive unit 30 is configured by the motor 27 and the arm 28 which is rotationally driven by the motor 27 and has the long hole 28 a into which the projection 43 c of the slide member 43 is fitted.
The slide member 43 is in a position where it can abut on the lever 39 (see FIGS. 2 and 4) by the turnover spring 49 whose one end is engaged with the slide member 43 and the other end is engaged with the link 41. When in the position where it can not abut against the lever 39, it is biased to the position where it can not abut.

The lever 39 is formed on the base 23 by a coil spring 47 which is engaged at a spring engaging portion 23i formed at the base 23 at one end and is engaged at a spring engaging portion 39c formed at the other end on the lever 39 It is biased in the direction of coming into contact with the stopper portion 23j.
Therefore, the lever 39 operated by the handle 22 which can be operated from the rear of the seat 1 and the lever 39 can be in two states which can not be pressed / pressed and pressed by the lever 39, The link 41 for transmitting the movement of the handle 22 to the seat slide lock device 13 transmits the movement of the handle 22 to the seat slide lock device 21 and the shut off state for not transmitting the movement of the handle 22 to the seat slide lock device 21 The cancel link mechanism 61 is configured to be movable.

  Next, the electrical configuration of the unlocking device 21 will be described with reference to FIG. Reference numeral 51 denotes a control unit that receives a P range signal (parking state signal) output from the AT computer when the automatic transmission (AT) is in the P range (parking state in which the transmission gear is fixed). Is a drive circuit of the motor 27 controlled by

Here, the operation of the lock release device 21 configured as described above will be described.
<When parking>
It demonstrates using FIGS. 1-5.
At the time of parking, the control unit 51 drives the motor 27 via the drive circuit 53 based on the P range signal: ON, and the abutted portion 43 b of the slide member 43 can abut on the abutment portion 39 b of the lever 39 It is moved to the next position (Fig. 2, Fig. 3).

Here, when the handle 22 is operated, the inner cable 31a of the cable 31 is pulled, and the lever 39 is rotated counterclockwise in FIG. 2 against the biasing force of the coil spring 47.
When the lever 39 rotates, as shown in FIGS. 4 and 5, the contact portion 39 b of the lever 39 presses the contact portion 43 b of the slide member 43 provided on the link 41, and the link 41 is of the torsion spring 45. The two seat slide lock devices (outer seat slide lock devices, which are in a locked state by rotating in the counterclockwise direction in FIG. 4 against the biasing force and pulling the inner cable 33a of the cable 33 and the inner cable 35a of the cable 35 The inner seat slide lock device 13 is unlocked and the seat 1 becomes movable.
<When not parked>
It demonstrates using FIG. 1, FIG. 6-FIG.

When the vehicle is not parked, the control unit 51 drives the motor 27 via the drive circuit 53 based on the P range signal: OFF, and the contact member 43b of the slide member 43 is in contact with the contact portion 39b of the lever 39. It is moved to the impossible position (Fig. 6, Fig. 7).
Here, when the handle 22 is operated, the inner cable 31 a of the cable 31 is pulled, and the lever 39 is rotated counterclockwise in FIG. 6 against the biasing force of the coil spring 47.

  Even if the lever 39 rotates, as shown in FIGS. 8 and 9, the contact portion 39b of the lever 39 can not push the abutted portion 43b of the slide member 43 provided on the link 41, so the link 41 rotates. Also, the inner cable 33a of the cable 33 and the inner cable 35a of the cable 35 are not pulled, and the two seat slide lock devices (outer seat slide lock device, inner seat slide lock device) 13 remain locked. Can not move.

According to the above configuration, the following effects can be obtained.
(1) The unlocking device 21 transmits the handle 22 provided on the seat back 5 and the movement of the handle 22 to the seat slide lock device (outer seat slide lock device, inner seat slide lock device) 13; A cancel link mechanism 61 capable of moving to a blocking state where the movement of the steering wheel is not transmitted to the seat slide lock device (outer seat slide lock device, inner seat slide lock device) 13, and the P range signal of the vehicle (parking state signal) Since the cancel link mechanism 61 has the drive unit 30 that switches the transmission state to the transmission state, the movement of the steering wheel 22 is not transmitted to the seat slide lock device 13 by the cancel link mechanism 61 while the vehicle is traveling. , The seat 1 does not slide against the will of the seated person.

 (2) By driving the two seat slide lock devices (outer seat slide lock device, inner seat slide lock device) 13 by the lock release device 21 (especially the link 41) provided on the seat back 5, the outer and inner The shift of the initial timing of unlocking of the seat slide lock device is reduced, and stable unlocking can be obtained. Also, since only one link 41 is used, space is saved.

(3) Since the slide member (moving member) 43 linearly moves with respect to the link 41, space is saved.
(4) The slide member 43 can not be in contact with the lever 39 in a direction where the slide member 43 can be in contact with the lever 39 (see FIGS. 2 and 4). In the case of (5), stable operation can be obtained since it is biased to the non-abutting position direction.

The present invention is not limited to the above embodiment.
In the above embodiment, the description has been made using the slide member 43 that linearly moves as the moving member. However, the moving member may be provided so as to be rotatable with respect to the link 41.
In addition, although the P range signal output from the AT computer when the automatic transmission is in the P range (the parking state in which the transmission gear is fixed) is used as the parking state signal, when the side brake is activated It is good also as a parking state signal that the signal issued to.
(Slide stopper mechanism 101)
The slide stopper mechanism 101 will be described with reference to FIGS. 11 is an exploded perspective view of the slide stopper mechanism, FIG. 12 is a view in the direction of arrow F in FIG. 11, showing a state at the time of parking, and FIG. 13 is a view in the direction of arrow R in FIG. FIG. 14 is a view taken in the direction of arrow F in FIG. 11 and shows a state other than the time of parking, and FIG. 15 is a view taken in the direction of arrow R in FIG. It is a figure which shows a state.

  The motor 107 is attached to the back surface of the base 103 provided on the lower rail 7 side (floor F side) using two screws 105 that pass through the two holes 103 a provided in the base 103. At the rotating end of the arm 108 provided on the output shaft of the motor 107, a protrusion 108a that protrudes in the direction of the base 103 is formed. The protrusion 108 a is inserted through the opening 103 b formed in the base 103 and protrudes to the surface of the base 103.

  A stopper 111 is disposed on the surface of the base 103. A hole 111 a is formed at one end (proximal end) of the stopper 111. Further, in the base 103, a hole 103c opposed to the hole 111a is formed. The stopper 111 is rotatably attached to the base 103 centering on the pin 113 by the pin 111 fitted in the hole 111 a of the stopper 111 and the hole 103 c of the base 103.

  A long hole 111 b is formed in the stopper 111, and the protrusion 108 a of the arm 108 rotationally driven by the motor 107 is fitted in the long hole 111 b. Therefore, when the arm 108 rotates upward, the stopper 111 also rotates upward, and when the arm 108 rotates downward, the stopper 111 also rotates downward.

  A protrusion 111 c protruding toward the base 103 is formed at the rotation end of the stopper 111, and a resin cap 114 is attached to the protrusion 111 c. The protrusion 111 c of the stopper 111 and the resin cap 114 are inserted through a window (hole) 103 d formed in the base 103. Therefore, the stopper 111 is rotatable within a range in which the projection 111c and the resin cap 114 abut on the upper side 103e functioning as the upper stopper of the window 103d and the lower side 103f functioning as the lower stopper.

A stopper portion 111 d having a stopper surface 111 e capable of coming into contact with the rear end portion of the upper rail 9 of the seat slide rail 11 is formed on the upper portion of the stopper 111.
In the state where the stopper 111 is in contact with the upper side 103e functioning as the upper stopper of the window 103d, as shown in FIGS. 14 and 15, the stopper surface 111e of the stopper portion 111d is the rear end of the upper rail 9 of the seat slide rail 11. It is in the position where it can abut on the part.

In a state where the stopper 111 is in contact with the lower side 103f functioning as the lower stopper of the window 103d, as shown in FIGS. 12 and 13, the stopper surface 111e of the stopper portion 111d is the rear end of the upper rail 9 of the seat slide rail 11. It is in the position where it can not abut on the part.
Between the base 103 and the stopper 111, there is disposed a single turnover spring 115, one end of which is engaged with the stopper 111 and the other end which is engaged with the base 103. When the stopper surface 111 e is in a position where the stopper surface 111 e can abut against the rear end portion of the upper rail 9 of the seat slide rail 11, the stopper surface 111 e is a seat slide rail. When it is in a position where it can not abut on the rear end of the upper rail 9, it is urged toward the position in which it can not abut.

  Further, when the stopper portion 111d of the stopper 111 abuts against the lower surface of the upper rail 9, a force is generated to move the stopper 111 in a direction in which the stopper 111 can not abut the rear end portion of the upper rail 9. A slope 111f is formed to allow the upper rail 9 that has been run up to move.

Further, the stopper 111 has two different planes in the rotational axis direction via the step 111g, and a stopper portion 111d having a stopper surface 111e is formed on one of the two planes, and the other surface is formed. The projection 111c and the hole 111a are formed on the bottom.
Next, the electrical configuration of the slide stopper mechanism 101 is the same as that of the unlocking device, and the P range signal (A) is issued from the AT computer when the automatic transmission is in the P range (the parking state in which the transmission gear is fixed). The control unit takes in a parking state signal and a drive circuit of the motor 104 controlled by the control unit.

Here, the operation of the slide stopper mechanism 101 configured as described above will be described.
<When parking>
This will be described using FIGS. 11 to 13.
During parking, the control unit drives the motor 107 via the drive circuit based on the P range signal: ON, to a position where the stopper surface 111 e can not contact the rear end of the upper rail 9 of the seat slide rail 11. The stopper 111 is moved (see FIGS. 12 and 13). That is, the stopper 111 is retracted.

In this state, in addition to the normal slide area NS, the sheet 1 can be moved to the long slide LS area.
<When not parked>
It demonstrates using FIG. 11, FIG. 14-FIG.

During non-parking, the control unit drives the motor 107 via the drive circuit based on the P range signal: OFF, to a position where the stopper surface 111 e can abut on the rear end of the upper rail 9 of the seat slide rail 11 The stopper 111 is moved (see FIGS. 14 and 15).
In this state, the sheet 1 can be moved only within the normal slide area NS.

According to the above configuration, the following effects can be obtained.
(1) A stopper 111 provided on the lower rail 7 side and movably provided at a position where it can or can not abut the rear end of the upper rail 9 and the stopper 111 abut on the rear end of the upper rail 9 A turn-over spring 115 that biases toward a position where contact is possible when it is possible, and toward a position where it can not contact when the stopper 111 can not contact with the rear end of the upper rail 9; When the stopper 111 moves to a position where contact with the rear end of the upper rail 9 is possible or impossible, the stopper 111 can contact with the rear end of the upper rail 9 by the turnover spring 115. When in the position, it urges toward the position where it can abut, and when the stopper 111 is in a position where it can not abut with the rear end of the upper rail 9, it urges to the position where it can not abut Be done. Therefore, the stability at the two positions is good, and there is no need to continue moving the stopper 111 against the biasing force of the biasing member manually, and the operability is good.

(2) Since the stopper 111 is driven based on the parking signal of the vehicle, stable operation can be obtained.
(3) Since the turn-over spring 115 is provided between the base 103 and the stopper 111, it does not easily interfere with other members without providing a cover or the like for protecting the turn-over spring 115.

(4) When the protrusion 111c of the stopper 111 is inserted through the window (hole) 103d provided in the base 103, the stopper 111 is further inclined in a direction other than the rotation direction while restricting the rotation range of the stopper 111 Can also function as a regulatory aspect of
(5) When the stopper 111d of the stopper 111 abuts against the lower surface of the upper rail 9, a force is generated to move the stopper 111 in a direction in which the stopper 111 can not abut the rear end of the upper rail 9. When the seat 1 is in the long slide area LS, the inclined surface 111f on which the upper rail 9 is moved is formed so that the stopper 111 which has been retracted is retracted with the rear end portion of the upper rail 9. The sheet 1 can be moved to the normal sliding area NS even if the sheet 1 is moved to the contactable position.

(6) The stopper 111 has two different flat surfaces in the rotational axis direction via the step 111g, whereby the strength of the stopper 111 is improved.
Further, a stopper portion 111d having a stopper surface 111e is formed on one of two flat surfaces, and a protrusion 111c and a hole 111a which is a rotation center of the stopper 111 are formed on the other surface. Thus, for example, even if the stopper portion 111d on one surface is deformed by impact or the like, the deformation to the other surface on which the protrusion 111c or the hole 111a is formed is prevented.

The present invention is not limited to the above embodiment.
The parking condition signal used was the P range signal output from the AT computer when the automatic transmission was in the P range (parking condition with the transmission gear fixed), but it was also issued when the side brake was activated. Signal may be used as a parking state signal.

  In the above embodiment, the stopper 111 is provided on the lower rail 7 side and the upper rail 9 is in contact with the stopper 111. Conversely, the stopper is provided on the upper rail side and is in contact with the lower rail side (floor F side) You may

1 Seat 5 Seat Back 7 Lower Rail 9 Upper Rail 11 Slide Rail 101 Slide Stopper Mechanism 111 Stopper 115 Turnover Spring

Claims (6)

A seat having a seat back for supporting the back of a seated occupant;
A lower rail provided on the floor side, a slide rail formed of an upper rail movably engaged with the lower rail and provided with the seat;
A sheet device having
A position provided on either side of the lower rail or the upper rail, a position capable of coming into contact with either the lower rail or the upper rail, and a stopper provided movably to a position incapable of coming into contact;
When the stopper is in the contactable position with the other, it is attached to the contactable position direction, and when the stopper is in the contact with the other part, it is attached to the contact impossible position. Turn over spring,
A seat device having a slide stopper mechanism comprising:   2. The seat apparatus according to claim 1, further comprising a drive unit configured to drive the stopper to the contactable position and the contact impossible position based on a parking state signal of the vehicle. The stopper is provided on a base provided on the lower rail side,
The sheet device according to claim 1, wherein the turnover spring is provided between the stopper and the base. The stopper is rotatably provided on the base and has a protrusion formed to protrude toward the base.
The sheet device according to claim 3, wherein the base is formed with a window through which the protrusion is inserted and which restricts a rotation range of the stopper. The stopper is
A stopper surface that can contact the rear end of the upper rail;
An inclined surface which generates a force for moving the stopper toward the non-contacting position when the lower rail contacts the lower surface of the upper rail;
The sheet device according to claim 4, characterized in that: The stopper is
With two different planes through the step in the direction of rotation axis,
The sheet device according to claim 5, wherein the stopper surface is formed on one of the two flat surfaces and the protrusion is formed on the other surface.

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