JP5365461B2 - Reclining device for vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve external appearance of a reclining device for a vehicle seat. <P>SOLUTION: This reclining device is used for fixing a backrest angle of a seat back 2 in relation to a vehicle body (a vehicle body side wall Bo), and includes a lock device 10 provided in the seat back 2 and a rail 20 provided at the vehicle body side wall Bo. The lock device 10 includes poles 12A and 12B which are mounted into engaging holes 21A and 22A formed in the rail 20 to become an engaged state with the rail 20, and a pressing arm 17 capable of preventing projecting and moving of the poles 12A and 12B into the engaging holes 21A and 22A. The pressing arm 17 is kept a hitting state on an upper part piece 21 of the rail 20 to permit projecting and moving of the poles 12A and 12B when the backrest angle of the seat back 2 in a prescribed angle adjusting region. When the backrest angle of the seat back 2 is deviated from the prescribed angle adjusting region, the pressing arm 17 is removed from the abutting on the upper part piece 21 to prevent the projecting and moving of the poles 12A and 12B. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a reclining device for a vehicle seat. More specifically, the present invention relates to a vehicle seat reclining device for fixing a backrest angle of a seat back with respect to a vehicle body.

  Conventionally, as a reclining device for a vehicle seat, for example, one disclosed in Patent Document 1 below is known. That is, the backrest angle of the seat back is fixed by engaging the rail mounted on the vehicle main body with a pin that can be moved in and out of the seat back.

Japanese Utility Model Publication No. 61-62636

  However, in the prior art disclosed above, the pin provided on the seat back is always held in a state of protruding by the biasing force, and protrudes even when the seat back is not engaged with the rail due to the forward tilt of the seat back. It is kept in a state and has a poor-looking configuration.

  The present invention has been devised to solve the above-described problems, and a problem to be solved by the present invention is to improve the appearance of a vehicle seat reclining device.

In order to solve the above problems, the vehicle seat reclining device of the present invention takes the following means.
First, a first invention is a vehicle seat reclining device for fixing a backrest angle of a seat back with respect to a vehicle body, and includes at least one projecting member provided on the seat back, and the projecting member is installed. And at least one engaging hole formed in the vehicle main body, and a movement preventing member provided in the seat back and capable of preventing the loading movement caused by the protrusion of the protruding member into the engaging hole. The seat back is configured so that the backrest angle with respect to the vehicle body is fixed by inserting the protruding member into the engagement hole by the protrusion. When the backrest angle of the seat back is within a predetermined angle adjustment range, the movement blocking member is in contact with a contact portion formed on the vehicle body to allow the protrusion member to project into the engagement hole. However, when the backrest angle of the seat back is out of the predetermined angle adjustment range, the seat back is released from the contact with the contact portion and is held in a state of preventing the protruding member from projecting.

  According to the first aspect of the present invention, the projection member provided on the seat back constituting the vehicle seat reclining device is moved by the movement preventing member when the backrest angle of the seat back is out of the predetermined angle adjustment range. The protruding movement is held in a blocked state. Therefore, in this state, the protruding member can be kept in a good-looking state that does not protrude.

  Next, in a second aspect based on the first aspect described above, the projecting member is supported by a guide provided on the seat back so as to be able to advance and retreat, and is pressed by an operation of a cam supported by the guide. By projecting and moving, the cam is supported by the supporting strength supported by the guide and is held so as not to be pushed back. The movement preventing member is held in a state in which the cam is inoperable by being engaged with the cam by being removed from the contact with the contact portion formed on the vehicle body, but the backrest angle of the seat back Is in a predetermined angle adjustment range, thereby coming into contact with the contact portion and being disengaged from the cam.

  According to the second aspect of the present invention, the protruding member is pressed by the operation of the cam and enters the engagement hole of the vehicle body, so that the cam is supported by the support strength supported by the guide and is not pushed back. Retained. Accordingly, the seat back can be held in a state in which the backrest angle is fixed with high support strength with respect to the vehicle body.

  Next, according to a third aspect of the present invention, in the first or second aspect described above, the seat back enters a predetermined angle adjustment region by a rearward tilt, and the projecting member enters the engagement hole by the rearward tilt. Before the positioning and alignment are possible, the movement preventing member is brought into contact with the abutting portion, and the protruding member is switched to a state in which it can project and move.

  According to the third aspect of the present invention, the movement preventing member is moved before the projection member is aligned with the engagement hole and becomes ready for loading when the seat back enters the predetermined angle adjustment region by the subsequent inclination. The projection member is switched to a state in which the projection member can project and move in contact with the contact portion. Therefore, when the seat back enters the predetermined angle adjustment region, the movement of the protruding member inserted into the engagement hole can be prevented from being hindered by the movement preventing member.

1 is a side view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is the side view showing the state where the backrest angle of the seat back was fixed. It is the III-III sectional view taken on the line of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat reclining device according to the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 to 2, the vehicle seat reclining device according to the present embodiment includes a seat back 2 of a vehicle seat 1 constituting a vehicle seat, and a vehicle body side wall Bo ( And a mechanism for fixing the backrest angle of the seat back 2 with respect to the vehicle body side wall Bo.

  Here, the above-described vehicle seat 1 is a seat for a seat disposed on the right side of the vehicle on the rear side of the driver's seat, and a lock device 10 provided on the right side of the seat back 2 is provided. By engaging with the rail 20 provided on the vehicle body side wall Bo adjacent to the right side portion of the seat back 2, the backrest angle of the seat back 2 with respect to the vehicle body side wall Bo is held in a fixed state. ing. Here, the lower portion of the seat back 2 described above is provided by being hinged to the rear portion of the seat cushion 3 fixedly installed on a vehicle body floor (not shown) so as to be rotatable by a connecting shaft R.

  Thereby, the seat back 2 is in a state in which the seat back 2 can tilt and rotate with respect to the seat cushion 3 around the hinge connecting point by the connecting shaft R described above. Hereinafter, the structure in which the locking device 10 provided on the seat back 2 and the rail 20 provided on the vehicle body side wall Bo are engaged will be described in detail. First, the configuration of the lock device 10 will be described. The locking device 10 includes a guide 11, two upper and lower poles 12A and 12B, a slide cam 13, a rotating cam 14, an operating shaft 15, a winding spring 16, a push arm 17, a lid cover 18, and a release lever. 19. Here, the poles 12A and 12B correspond to the protruding member of the present invention, the slide cam 13 corresponds to the cam of the present invention, and the push arm 17 corresponds to the movement preventing member of the present invention. In FIG. 1 to FIG. 2, the winding spring 16 and the lid cover 18 are respectively indicated by virtual lines in order to easily understand the internal structure of the locking device 10.

  The guide 11 is formed of a horizontally long plate-like member as shown in the figure, and is provided integrally attached to a skeleton frame of the seat back 2 (not shown). The guide 11 is formed with four guide portions 11A to 11D projecting from the plate, respectively, for supporting two upper and lower poles 12A and 12B, which will be described later, so as to be movable up and down. The poles 12A and 12B are formed in a vertically symmetrical shape as shown in the figure, and are arranged side by side with the upper and lower portions of the guide 11 described above, and It is assembled in a state that is supported so as to be movable.

  In detail, the pole 12A assembled to the upper side of the guide 11 in the figure is disposed between the guide portion 11A and the guide portion 11B projecting from the guide 11, and both side portions thereof are both guides. By being applied by the portions 11A and 11B, the guide 11 is assembled so as to be supported so as to be slidable only in the vertical direction in the figure. Further, the pole 12B assembled to the lower side of the guide 11 in the figure is disposed so as to be sandwiched between the guide portion 11C and the guide portion 11D formed to protrude from the guide 11, and both side portions thereof are both guide portions. By being applied by 11C and 11D, the guide 11 is assembled so as to be supported so as to be slidable only in the vertical direction in the figure.

  Each of the above-described poles 12A and 12B is directed to both outer sides (upper and lower sides) all at once as the slide cam 13 disposed between the poles 12A and 12B slides. It is operated so as to be pushed out (see FIG. 2) or pulled in toward both the insides (see FIG. 1). Here, a protrusion 12Aa is formed on the upper surface of the pole 12A disposed on the upper side of the figure, and protrudes toward the upper side of the figure, and the lower surface of the pole 12B on the lower side of the figure. The part is formed with a protrusion 12Ba protruding toward the lower side in the figure from which the pole 12B is pushed out.

  As a result, the poles 12A and 12B are pushed out to the both outer sides in accordance with the sliding operation of the slide cam 13 described above, thereby projecting the protrusions 12Aa and 12Ba to the outer sides (upper side or lower side), respectively. (See FIG. 2). As shown in FIG. 2, the protrusions 12 </ b> Aa and 12 </ b> Ba enter the engagement holes 21 </ b> A and 22 </ b> A formed in the upper piece 21 and the lower piece 22 of the rail 20 by the protrusions of the protrusions 12 </ b> Aa and 12 </ b> Ba, respectively. Thus, the locking device 10 is engaged with the rail 20, and the movement is held in a locked state.

  Next, returning to FIG. 1, the configuration of the slide cam 13 will be described. As shown in the figure, the slide cam 13 is disposed in a state of being sandwiched between the upper guide portions 11A and 11B and the lower guide portions 11C and 11D which are formed to protrude from the guide 11 described above. The guides 11A to 11D are supported by the guides 11A to 11D so that the guides 11 are supported so as to be slidable only in the horizontal direction in the figure perpendicular to the moving direction of the poles 12A and 12B. ing.

  The above-described slide cam 13 has a through hole 13A in the center thereof, and slides in the left-right direction in the figure with respect to the guide 11 as the rotary cam 14 assembled in the through hole 13A rotates. It has come to be. The above-mentioned slide cam 13 receives an acting force that is normally urged to rotate counterclockwise by the urging force of the winding spring 16 that is hooked between the rotating cam 14 and the lid cover 18. The guide 11 is pressed to slide rightward in the figure.

  However, as shown in FIG. 1, when the seat back 2 is tilted forward and the locking device 10 is disengaged from the rail 20, the slide cam 13 is pushed on the right side in the figure. It is pressed by the arm 17 and held in a state in which movement (lock movement) to the right side in the figure due to the urging of the winding spring 16 is prevented. As a result, the slide cam 13 is normally in a state in which the leg portions 12Ab and 12Bb of the poles 12A and 12B are inserted into the recesses 13C and 13C formed to be recessed in the upper surface portion and the lower surface portion. The poles 12A and 12B are held in a state of being pulled inward.

  Specifically, the slide cam 13 has hooks 13B and 13B formed on the upper surface portion and the lower surface portion thereof, and each pawl formed by protruding into the recessed space on the inner peripheral side of the poles 12A and 12B. By hooking on the portions 12Ac and 12Bc, the poles 12A and 12B are pulled and held in the direction of pulling each other. As shown in FIG. 2, the slide cam 13 tilts backward, and the lock device 10 enters the rail 20, so that the support by the push arm 17 is removed, and the winding spring 13 is wound. The urging force of 16 moves (locks) to the right side in the figure.

  As a result of this movement, the slide cam 13 causes the leg portions 12Ab and 12Bb of the poles 12A and 12B to be inclined from the concave surfaces of the concave portions 13C and 13C (see FIG. 1). 13D, the poles 12A and 12B are pushed out to the outside. Here, each shoulder 13D, 13D of the slide cam 13 is formed as a flat surface with its surface facing straight upward or downward, which is the moving direction of each pole 12A, 12B. As a result, the poles 12A and 12B riding on the shoulders 13D and 13D are supported by the slide cam 13 with a strong force from the inside even when receiving an acting force in a direction of being drawn toward the inside. As a result, it is not retracted inside.

  Next, the configuration of the rotating cam 14 will be described. As shown in FIGS. 1 and 3, the rotary cam 14 is inserted into a circular hole formed in the center of the lid cover 18 described later, and is supported by the lid cover 18 so as to be capable of rotating the shaft. It is provided in the state. The rotary cam 14 is formed so that one end of the shaft thereof is inserted into the through hole 13A formed in the center of the slide cam 13 and protrudes to the outer peripheral portion of the end with the assembly described above. The corner portion 14A is provided in a state of being fitted into a key groove 13Aa that is recessed in the through hole 13A.

  Thereby, the rotary cam 14 presses the slide cam 13 in the direction in which the shaft is rotated by the corner portion 14A fitted in the key groove 13Aa of the through hole 13A of the slide cam 13 as the shaft rotates. It is designed to move. Here, as shown in FIG. 3, the rotating cam 14 has a winding spring 16 hooked between the other end of the shaft and an engaging pin 18 </ b> A formed to protrude from the lid cover 18. The coil spring 16 is urged to rotate in the counterclockwise direction shown in FIG.

  The rotary cam 14 is slid by pressing the slide cam 13 toward the right side in the figure by this rotational biasing force. Here, as shown in FIG. 3, the operating shaft 15 is inserted into and integrally connected to the shaft center portion of the rotating cam 14 described above. A release lever 19 is integrally mounted on the operation shaft 15. As can be seen with reference to FIG. 2, the operation shaft 15 rotates in the same direction by pulling up the release lever 19 forward. Thus, the rotating cam 14 is operated to rotate in the direction against the urging of the winding spring 16 (clockwise direction in the drawing).

  As a result, the slide cam 13 is slid to the left as shown in FIG. 1, and the poles 12A and 12B are pulled in the direction in which the hooks 13B and 13B of the slide cam 13 are pulled toward each other. Thus, the protrusions 12Aa and 12Ba of the poles 12A and 12B are removed from the state where they enter the engagement holes 21A and 22A of the rail 20 (see FIG. 2). That is, the state where the locking device 10 is engaged with the rail 20 is released. Further, when the hand is released from the operation of the release lever 19, the slide cam 13 is again slid to the right side in the figure as shown in FIG. 2 by the urging force of the winding spring 16, and each of the poles 12A and 12B is moved. The projections 12 </ b> Aa and 12 </ b> Ba are returned to the state where the protrusions 12 </ b> Aa and 12 </ b> Ba enter the engagement holes 21 </ b> A and 22 </ b> A of the rail 20 again (the state where the locking device 10 is engaged with the rail 20).

  However, as shown in FIG. 1, as described above, when the seat back 2 is tilted forward and the locking device 10 is detached from the rail 20, the slide cam 13 is The right side of the figure is pressed by the push arm 17 so that the right side of the figure (lock movement) due to the urging of the winding spring 16 is blocked and held. Thereby, when the locking device 10 is in a state of being detached from the rail 20, the protrusions 12Aa and 12Ba of the poles 12A and 12B are held in a state of being pulled inward.

  Next, the configuration of the push arm 17 will be described. As shown in FIG. 1, the push arm 17 is formed in a shape in which arms (a presser portion 17C and a kicked portion 17D) are extended in two directions so as to be L-shaped, and a support shaft 17A. Is supported on the plate of the guide 11 so as to be axially rotatable. The above-described support shaft 17A is integrally fixed to the guide 11, and has a configuration in which the push arm 17 is supported so as to be rotatable. Between the support shaft 17A and the kicked portion 17D of the push arm 17, a winding spring 17B that urges the push arm 17 to rotate in the clockwise direction is hooked.

  Thereby, as shown in FIG. 1, when the locking device 10 is disengaged from the rail 20, the pressing arm 17 causes the pressing portion 17 </ b> C to be moved by the urging force of the winding spring 17 </ b> B. The state is pressed against the right side of the figure, and is held in a state in which the slide cam 13 is prevented from moving toward the right side of the figure. At this time, the push arm 17 is held in a posture state in which the kicked portion 17D is directed upward in the figure.

  In this state, when the seat back 2 is tilted backward and the push arm 17 enters the rail 20, the kicked portion 17D hits the upper piece 21 of the rail 20 as shown in FIG. The pressing portion 17C is released from the contact state with the slide cam 13. As a result, the slide cam 13 can be moved to the right side in the figure by the urging of the winding spring 16, and the projections 12Aa, 12Ba of the poles 12A, 12B and the rails 20 are each tilted by the seat back 2. By aligning the engagement holes 21A and 22A, the respective poles 12A and 12B are pushed outward by the slide cam 13 and engaged with the rail 20. Here, the upper piece 21 corresponds to the contact portion of the present invention.

  The upper piece 21 described above is formed in a flat surface shape that is continuous over the entire region of the rail 20 in the length direction (front-rear direction). Therefore, when the locking device 10 enters the rail 20, the pressing portion 17 </ b> C of the pressing arm 17 is always held in a state where it does not come into contact with the slide cam 13. The operation of releasing the engagement state between the device 10 and the rail 20 or releasing the hand from the operation of the release lever 19 to re-engage the lock device 10 with the rail 20 can be freely performed again and again. ing.

  As shown in FIG. 1, the above-described push arm 17 is in a state where the seat back 2 is tilted forward and the locking device 10 is detached from the rail 20, as described above, The spring 17B is rotated in the clockwise direction by the urging force of the winding spring 17B so that the pressing portion 17C is pressed against the right side surface of the slide cam 13 and the slide cam 13 moves to the right side in the drawing. (Lock movement) is blocked.

  Next, the configuration of the lid cover 18 will be described. As shown in FIG. 3, the lid cover 18 is integrally assembled with the above-described guide 11 so that the assembled parts such as the above-described slide cam 13 and poles 12 </ b> A and 12 </ b> B do not fall off the guide 11. It is a functional part to hold. The lid cover 18 is supported by being integrally assembled with the frame of the seat back 2 together with the guide 11 by a coupling structure (not shown).

  Next, the configuration of the rail 20 will be described. As shown in FIG. 1, the rail 20 is formed of a long metal plate, and is integrally joined to the vehicle body side wall Bo. As shown in FIG. 3, the upper and lower edges of the rail 20 are formed as an upper piece 21 and a lower piece 22 that are bent toward the inside of the vehicle on which the vehicle seat 1 is provided. Yes. The rail 20 receives the locking device 10 in a space surrounded by the upper piece 21 and the lower piece 22 and pushes and kicks the kicked portion 17D (see FIG. 2) of the push arm 17 by the upper piece 21. The projections 12Aa and 12Ba of the poles 12A and 12B are received in the engagement holes 21A and 22A formed in the upper piece 21 and the lower piece 22, and the poles 12A and 12B are engaged. Yes.

  Here, as shown in FIG. 3, the shape of the upper piece 21 and the lower piece 22 of the rail 20 described above is narrowed so that the shape of the upper side 21 and the lower piece 22 on the right side in FIG. Guide portions 21B and 22B are formed. When the locking device 10 is received in the rail 20, these guide portions 21 </ b> B and 22 </ b> B are respectively applied to the upper surface portion and the lower surface portion of the guide 11, and the guide 11 hangs up and down in the rail 20. It is designed to function to prevent it from sticking.

  Here, as shown in FIGS. 1 to 2, the upper piece 21 and the lower piece 22 described above are arcs around the connecting axis R that is the tilting center when the seatback 2 tilts in the front-rear direction. It is curved along the shape. The upper piece 21 and the lower piece 22 are formed with a plurality of engagement holes 21A and 22A penetrating along the curved longitudinal direction. These engagement holes 21A and 22A are arranged so as to face each other in the radial direction of the arc centered on the connecting axis R. As shown in FIGS. The protrusions 12Aa and 12Ba of the poles 12A and 12B can be received simultaneously. As a result, the protrusions 12Aa and 12Ba of the poles 12A and 12B can be engaged at a plurality of positions in the longitudinal direction of the rail 20, and the backrest angle of the seat back 2 can be selected by selecting the engagement position. Can be adjusted freely.

  Thus, according to the configuration of the vehicle seat reclining device of the present embodiment, the poles 12A and 12B of the locking device 10 provided on the seat back 2 have the backrest angle of the seat back 2 and the push arm 17 is the rail. When it is in an angle region that is in a state of being out of contact with the upper piece 21 of 20 (corresponding to a state of being out of the predetermined angle adjustment region of the present invention), the protruding movement is caused by the push arm 17. It is kept in a blocked state. Therefore, in this state, the poles 12A and 12B can be held in a good-looking state that does not protrude.

  Further, the poles 12A and 12B are pressed by the operation of the slide cam 13, and the projections 12Aa and 12Ba are inserted into the engagement holes 21A and 22A of the rail 20, whereby the slide cam 13 is supported by the guide 11. It is held by being supported by the supporting strength so as not to be pushed back. Thereby, the seat back 2 can be held in a state in which the backrest angle is fixed with high support strength with respect to the vehicle main body (vehicle body side wall Bo).

  Further, when the seat back 2 is tilted thereafter, the pushed portion 17D of the push arm 17 enters the predetermined angle adjustment range where the upper piece 21 of the rail 20 is pushed and kicked, so that the poles 12A and 12B are moved into the engagement holes 21A and 22A. Before being aligned and ready for loading, the kicked portion 17D of the push arm 17 is brought into contact with the upper piece 21, and the poles 12A and 12B are switched to a state in which they can project and move. Therefore, when the seat back 2 enters the predetermined angle adjustment range, the movement of inserting the poles 12A and 12B into the engagement holes 21A and 22A is prevented from being hindered by the push arm 17. Can do.

  As mentioned above, although embodiment of this invention was described using one Example, this invention can be implemented with various forms other than the said Example. For example, as shown in FIGS. 1 to 2, the push arm 17 corresponding to the movement preventing member of the present invention is pushed and kicked by the upper piece 21 (contact portion) of the rail 20 and the slide cam 13 (cam). However, it is pushed and kicked by the lower piece 22 of the rail 20 and rotates in the clockwise direction in the drawing so as to be out of contact with the slide cam 13 (cam). It may be configured.

  Moreover, although the slide cam 13 was illustrated as a cam which pushes and operates each pole 12A, 12B (projection member) in the engagement holes 21A, 22A of the rail 20, a rotary cam which pushes each pole by rotation is used. There may be. In addition, although two poles 12A and 12B corresponding to the protruding member of the present invention are illustrated, the number of poles may be one or three or more. In addition, although a plurality of engagement holes 21A and 22A are formed along the longitudinal direction of the rail 20, the engagement holes 21A and 22A are formed only at one place in the longitudinal direction of the rail 20, and the seat The backrest 2 may be configured such that the backrest angle of the back 2 can be locked only at one place. Further, the lock device 10 may have a configuration in which the pole (projection member) is arranged to project and move from the outer side surface of the seat back 2 toward the vehicle body side wall Bo.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion R Connection shaft 10 Locking device 11 Guide 11A-11D Guide part 12A, 12B Pole (projection member)
12Aa, 12Ba Protrusion 12Ab, 12Bb Leg 12Ac, 12Bc Claw 13 Slide cam (cam)
13A Through hole 13Aa Keyway 13B Hook part 13C Recessed part 13D Shoulder part 14 Rotating cam 14A Corner part 15 Operation shaft 16 Winding spring 17 Push arm (movement blocking member)
17A Support shaft 17B Winding spring 17C Holding part 17D Kicked part 18 Lid cover 18A Engaging pin 19 Release lever 20 Rail 21 Upper piece (contact part)
21A Engagement hole 21B Guide part 22 Lower piece 22A Engagement hole 22B Guide part Bo Car body side wall (vehicle body)

Claims (3)

A reclining device for a vehicle seat for fixing a backrest angle with respect to a vehicle body of a seat back,
At least one protruding member provided on the seat back;
At least one engagement hole formed in the vehicle body so that the protruding member can be inserted;
A movement blocking member provided on the seat back and capable of blocking a loading movement due to the protrusion of the protruding member into the engagement hole;
The seat back is configured such that a backrest angle with respect to the vehicle body is fixed when the protruding member is inserted into the engagement hole by the protrusion, and the movement preventing member is supported by the backrest of the seat back. When the angle is within a predetermined angle adjustment range, the seat back is held in a state in which the projecting member is allowed to project into the engagement hole by contacting the contact portion formed on the vehicle body. The vehicle seat is held in a state in which the protruding angle of the protruding member deviates from the contact with the abutting portion and prevents the protruding member from projecting and moving by deviating from the predetermined angle adjustment range. Reclining device. The vehicle seat reclining device according to claim 1,
The projecting member is supported by a guide provided on the seat back so as to be able to move forward and backward. The cam is supported by the guide by being pushed and moved by the operation of the cam supported by the guide. The movement preventing member is supported by the support strength so as not to be pushed back, and the movement preventing member is engaged with the cam by coming out of contact with the contact portion formed on the vehicle body. Although the cam is held in an inoperable state, the backrest angle of the seat back enters the predetermined angle adjustment region, thereby coming into contact with the contact portion and being disengaged from the cam. A reclining device for a vehicle seat, characterized in that The vehicle seat reclining device according to claim 1 or 2,
The seat back is then inclined to enter the predetermined angle adjustment region, and the movement prevention is performed before the protruding member is aligned with the engagement hole and can be inserted by the rear inclination. A reclining device for a vehicle seat, wherein the member is brought into contact with the abutting portion so that the protruding member can be protruded and moved.

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