JP5505317B2 - Vehicle seat device - Google Patents

Description

  The present invention relates to a vehicle seat device including a walk-in mechanism.

  As a vehicle seat device in which a seat back is tilted with respect to a seat cushion with an operating shaft as a fulcrum within a tilting region composed of a seating region for tilt angle adjustment and a forward tilting region on the front side of the seating region, Some include a seat reclining device and a seat slide device.

  The seat reclining device has a locked state that restricts the tilt of the seat back with respect to the seat cushion and an unlocked state that allows the tilt to rotate according to the operation of the first operating lever and the second operating lever. A lock mechanism is provided for switching between the two.

  Some seat reclining devices incorporate a memory mechanism that is actuated by operation of a second operation lever in addition to the locking mechanism. The memory mechanism stores the angular position of the seat back immediately before the operation of tilting the seat back from the seating area to the forward tilting area (forward tilting), that is, the angular position of the seat back immediately before switching to the unlocked state. To do. Further, the memory mechanism allows the return to the locked state only when the seat back in the unlocked state tilts to the stored angular position due to the seat back from the forward-falling region to the seating region. According to the seat reclining device having this memory mechanism, the angle position of the seat back in the seating area just before the forward movement is regenerated only by performing the seat back raising operation. The operability of is improved.

  On the other hand, the seat slide device restricts the sliding movement of the seat cushion with respect to the vehicle floor at least in the seating region. In addition, the seat slide device releases the restriction of the slide movement in conjunction with the tilting (forward tilt) of the seat back from the seating area to the forward tilting area (see Patent Document 1). When the seat of the front seat that has been released from this restriction is slid forward, the passenger can get on and off the rear seat more easily. As described above, the mechanism that slides the vehicle seat device forward in conjunction with the seatback being moved forward from the seating area to the forward-falling area is also referred to as a walk-in mechanism.

JP 2008-273350 A

  However, the conventional vehicle seat device locking mechanism including Patent Document 1 has a specification that allows the seat back to be switched to the locked state when the seat back is in any angular position in the tilting region. Yes. For this reason, when adjusting the tilt angle of the seat back, if the operation of the first operation lever is performed in the forward tilt region, the restriction of the slide movement in the seat slide device may be unintentionally released.

  The present invention has been made in view of such a situation, and an object of the present invention is to release the restriction of the slide movement in the seat slide device when adjusting the tilt angle of the seat back through the operation of the first operation lever. It is providing the vehicle seat apparatus which can suppress this.

  In order to achieve the above object, the invention according to claim 1 is directed to a seat cushion using a seating region for adjusting the tilt angle and a forward tilting region on the front side of the seating region as a tilting region, and an operation shaft as a fulcrum. On the other hand, the operation of the first operation lever and the second operation lever includes a seat back that tilts in the tilt area, a locked state that restricts the tilt of the seat back relative to the seat cushion, and an unlocked state that allows the tilt. The locking mechanism that can be switched by the rotation of the corresponding operating shaft and at least the seating region restrict the sliding movement of the seat cushion, and the locking mechanism is brought into the unlocked state according to the operation of the second operating lever. The seats that are switched and release the restriction in conjunction with the seatback being moved forward from the seating area to the forward-falling area. When the first operation lever is operated, when the seat back is tilted within the seating area, the lock mechanism switches between the locked state and the unlocked state when the first operating lever is operated. The gist of the present invention is to further include a switching restriction mechanism that restricts only to the above.

  The seat slide device restricts the sliding movement of the seat cushion when the seat back is tilted at least in the seating region. Further, in the seat slide device, when the lock mechanism is switched to the unlocked state according to the operation of the second operation lever, and the seat back is moved forward from the seating area to the forward tilting area, the slide movement is performed in conjunction with the forward tilting. To remove the restrictions. By releasing the restriction, the seat cushion can be slid.

  Here, as with a general seat reclining device, the first operation lever can be used to switch between the locked state and the unlocked state in the locking mechanism when the seat back is in any angular position in the tilting region. It shall be. In this case, when adjusting the tilt angle of the seat back, if the operation of the first operation lever is performed in the forward tilted region, the restriction of the slide movement in the seat slide device may be unintentionally released.

  In this regard, in the first aspect of the invention, when the first operating lever is operated, the lock mechanism is switched between the locked state and the unlocked state only when the seat back is tilted within the seating area by the switching restriction mechanism. Limited. Therefore, in the forward-falling region, switching between the locked state and the unlocked state by the lock mechanism is impossible. As a result, when the tilt angle of the seat back is adjusted by operating the first operating lever, the restriction of the slide movement in the seat slide device is released without accidentally tilting the seat back in the forward tilting area. Disappears.

  The invention according to claim 2 is the first member according to claim 1, wherein the lock mechanism is attached to one of the seat cushion and the seat back and has an internal gear around the operation shaft. And a second member attached to the other and rotatable about the operating shaft with respect to the first member, and a plurality of external teeth attached to the second member and facing the internal gear. A locking member, and pressing the locking members radially outward to engage the external teeth with the internal gear to bring the seat back into the locked state, and by rotating the operation shaft, The gist of the invention is to bring the seat back into the unlocked state by moving each lock member radially inward to release the engagement of the external teeth with the internal gear.

  According to the above configuration, the seat back is locked by pressing each lock member attached to the second member radially outward and meshing the external teeth of each lock member with the internal gear of the first member. Put into state. In this locked state, the tilt of the seat back with respect to the seat cushion is restricted.

  When the seat back in the locked state is switched to an unlocked state in which tilting is allowed, each lock member is moved radially inward by rotating the operation shaft. By this movement, each lock member is moved inward in the radial direction, and the meshing of the external teeth with the internal gear is released.

  According to a third aspect of the present invention, in the invention of the second aspect, the angular position of the seat back in the locked state immediately before switching to the unlocked state is stored, and the seat back in the unlocked state is stored And a memory mechanism that allows the return to the locked state only when tilted to the stored angular position, and the second operating lever is operated when the memory mechanism is operated to rotate the operating shaft. The gist is that it should be moved.

  According to the above configuration, when the second operating lever is operated and the operating shaft is rotated, the lock mechanism is switched between the locked state and the unlocked state, and the memory mechanism is operated. In the memory mechanism, the angular position of the seat back in the locked state immediately before switching to the unlocked state is stored, and the locked state by the lock mechanism is only when the unlocked seat back is tilted to the stored angular position. Return to is allowed.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the memory mechanism has a cylindrical storage recess provided in the first member and an annular shape divided at one place, and is compressed. The memory plate is stored in the storage recess in a diameter state and has a pair of engaged portions at different locations in the circumferential direction, and the lock is provided on the pair of lock members among the plurality of lock members. An engaging portion that engages and disengages with the engaged portion as the member moves in the radial direction, and the unlocked state is semi-engaged with respect to the engaged portion corresponding to the engaging portion in the radial direction. In this state, the engaged portion is pressed in the circumferential direction by the engaging portion, and the memory plate is rotated integrally with the lock member with respect to the storage recess, thereby adjusting the angular position. Without storing, the seat bar On the inner peripheral surface of the memory plate in a state in which the engaging portion gets over the engaged portion and the memory plate is non-rotatably locked with respect to the housing recess. The gist of the invention is that the seat back is allowed to tilt after the angular position is memorized.

  According to the above configuration, in the unlocked state of the seat back by the locking mechanism, the memory mechanism allows the seat back to tilt without storing the angular position, and the memory mechanism stores the angular position and stores the angular position. Some allow back tilt.

  In the former unlocked state, the engaging portion of the lock member is semi-engaged with the corresponding engaged portion in the radial direction. In this state, the engaged portion is pressed in the circumferential direction by the engaging portion, and stored. This occurs when the memory plate is rotated integrally with the locking member with respect to the recess.

  In the latter unlocked state, the above-mentioned engaging portion gets over the corresponding engaged portion, and the memory plate is slid on the inner peripheral surface of the memory plate in a state where the memory plate is non-rotatably locked with respect to the housing recess. It is caused by being done.

  The invention according to claim 5 is the memory plate according to claim 4, wherein the switching restriction mechanism is provided so as to be integrally rotatable in the first member, and the engaging portion slides. A rotation restricting portion having an inner peripheral surface having the same diameter as the inner peripheral surface, and when the first operating lever is operated, the engagement portion in a half-engaged state is brought into contact with the rotation restricting portion. The rotation of the lock member with the memory plate is restricted to prevent the seat back from being tilted from the seating area to the forward tilting area, and when the second operating lever is operated, The seat back is allowed to tilt from the seating area to the forward tilting area by sliding over the inner peripheral surface of the memory plate over the engaged part and the rotation restricting part. The main point is that

  According to the above configuration, when the first operation lever is operated to tilt the seat back from the seating area to the forward tilting area, the engaging portion in the half-engaged state rotates at the boundary portion between the two areas. Abuts against the restriction. Due to this contact, further rotation of the lock member with the memory plate is restricted, that is, rotation of the second member relative to the first member is restricted, and tilting of the seat back to the forward tilting region is prevented.

  On the other hand, when the second operation lever is operated to tilt the seat back from the seating area to the forward-falling area, the engaging part moves the engaged part and the rotation restricting part at the boundary part between the two areas. It gets over and is slid on the inner peripheral surface of the memory plate. By this sliding, the lock member is allowed to rotate, that is, the second member is allowed to rotate with respect to the first member, and the seat back is allowed to tilt from the seating region to the forward tilting region.

  According to a sixth aspect of the present invention, in the fourth aspect of the present invention, the switching restriction mechanism is provided on the seat back, and can be tilted by a contacted portion that is displaced with the tilt of the seat back and a shaft. A movable stopper that is tilted between a contact position that restricts the tilt of the seat back by contact with the contacted portion, and a non-contact position that is retracted from the contact position, and the operation shaft And a link member that is connected to the movable stopper so as to be capable of transmitting the rotation of the operation shaft accompanying the operation of the first operation lever and the second operation lever to the movable stopper, and without storing the angular position, When the operation of the first operation lever and the second operation lever for rotating the operation shaft by an angle for causing the unlocked state allowing the seat back to tilt is performed, the link member is rotated. Is prevented from being transmitted to the movable stopper, and the movable stopper is positioned at the abutting position to restrict the forward tilt of the seat back. The unlocking state in which the switching of the locked state is limited only when the seat back tilts in the seating area, and the tilting of the seat back is permitted without storing the angular position of the second operation lever. When the operation of rotating the operation shaft is performed more than when the operation member is caused to rotate, the rotation of the link member is transmitted to the movable stopper, and the movable stopper is retracted to the non-contact position, and the seat back Rotation transmission control that allows the seat back to be tilted forward from the seating region to the forward tilting region by releasing the forward tilt restriction of the seat back And summarized in that and means.

  According to the above configuration, the first operation lever and the second operation lever that rotate the operation shaft by the angle for causing the unlocked state that allows the seat back to tilt without storing the angular position are operated. The rotation of the link member is blocked from being transmitted to the movable stopper by the rotation transmission control means. By this blocking, the movable stopper is positioned at the contact position and contacts the contacted portion, so that the tilting of the contacted portion, and consequently the seat back, is restricted. Due to this restriction, switching between the locked state and the unlocked state by the lock mechanism is limited only when the seat back tilts in the seating area.

  As for the second operation lever, when the operation of rotating the operation shaft is performed more than when the unlocked state in which the tilting of the seat back is allowed without storing the angular position is performed, the rotation of the link member causes the movable stopper to rotate. The movable stopper is retracted to the non-contact position. By this retreat, the forward tilt restriction of the seat back is released, and the forward tilt of the seat back from the seating area to the forward tilting area is allowed.

  As the rotation transmission control means, for example, as in the invention according to claim 7, the cam hole formed in one of the movable stopper and the link member, and the other provided in the cam hole are inserted into the cam hole. A thing provided with a pin can be adopted.

  In this case, when the first operation lever is operated, the link member rotates integrally with the operation shaft. Accordingly, the position of the pin in the cam hole changes around the operation shaft. At this time, the rotation of the link member is not transmitted to the movable stopper through the pin and the cam hole. In other words, the rotation of the link member transmitted to the movable stopper is blocked by the movement of the pin within the cam hole. By this blocking, the movable stopper is positioned at the contact position and contacts the contacted portion, so that the tilting of the contacted portion, and consequently the seat back, is restricted. Due to this restriction, switching between the locked state and the unlocked state by the lock mechanism is limited only when the seat back tilts in the seating area.

  When the second operation lever is operated to rotate the operation shaft more than when the unlocked state in which the tilt of the seat back is allowed without memorizing the angular position is performed, the first operation lever is operated. There are more link members than when rotating, so that they rotate together with the operating shaft. The rotation of the link member is transmitted to the movable stopper through the pin and the cam hole, and the movable stopper is retracted to the non-contact position. By this retreat, the forward tilt restriction of the seat back is released, and the forward tilt of the seat back from the seating area to the forward tilting area is allowed.

  According to the vehicle seat device of the present invention, when the inclination angle of the seat back through the operation of the first operation lever is adjusted, it is possible to suppress the release of the restriction of the slide movement in the seat slide device.

The front view which shows the frame | skeleton part of the vehicle seat apparatus in 1st Embodiment which actualized this invention. The side view which similarly shows the frame | skeleton part of the vehicle seat apparatus. The side view explaining the tilting area of a seat back. The disassembled perspective view of a seat reclining device. The disassembled perspective view of a seat reclining device. The front view of a seat reclining apparatus. AA line sectional view of Drawing 6. The fragmentary sectional view which expands and shows a part of FIG. FIG. 9 is a partial cross-sectional view corresponding to FIG. 8 and showing a comparative example of a seat reclining device. BB sectional drawing of FIG. CC sectional view taken on the line of FIG. The rear view which shows the state which looked at the seat reclining apparatus of FIG. 7 from the arrow D direction. The rear view which shows the state which looked at the memory plate in the seat reclining apparatus of FIG. 7 from the arrow D direction. The partial side view which shows the structure of the operation shaft of the right side of the vehicle seat apparatus, and its peripheral part. The partial side view which shows the structure of the operation shaft of the right side of a vehicle seat apparatus, and its peripheral part when a 1st operation lever is operated to the cancellation | release position from the state of FIG. The partial side view which shows the structure of the left side operating shaft of a vehicle seat apparatus, and its peripheral part. The partial side view which shows the structure of the left side operation shaft of a vehicle seat apparatus, and its peripheral part when the 2nd operation lever is pulled up from the state of FIG. EE sectional view taken on the line of FIG. FF sectional view taken on the line of FIG. FIG. 11 is a cross-sectional view showing the seat reclining device that has been switched from the state of FIG. 10 to an unlocked state in which the operating shaft is rotated and the tilt of the seat back is allowed without storing the angular position. FIG. 21 is a cross-sectional view showing the seat reclining device in which the operation shaft is further rotated from the state shown in FIG. FIG. 22 is a cross-sectional view showing the seat reclining device when the operating shaft is further rotated from the state of FIG. 21 and the seat back is tilted forward. In 2nd Embodiment which actualized this invention, the partial side view which shows the structure of a switching restriction | limiting mechanism. The partial side view which shows the state of the switching restriction | limiting mechanism when the 2nd operation lever is operated from the state of FIG. It is a figure corresponding to FIG. 8, and the elements on larger scale which show another example of a storage recessed part.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a vehicle seat device having a walk-in mechanism will be described with reference to FIGS.

  In the following description, the forward direction of the vehicle will be described as the front (front of the vehicle), and the reverse direction of the vehicle will be described as the rear (rear of the vehicle). Further, in the following description, the vertical direction means the vertical direction of the vehicle, and the horizontal direction is the vehicle width direction of the vehicle and coincides with the horizontal direction when the vehicle moves forward.

In the present embodiment, as a vehicle, a vehicle of a type in which a boarding / exiting space is not sufficiently wide when the door is opened, such as a two-door vehicle or a one-box car is assumed.
As shown in FIGS. 1 and 2, the skeleton portion of the vehicle seat device includes lower rails 11A and 11B and upper rails 12A and 12B that are paired in the vehicle width direction, a seat cushion frame 14, and a seat back frame 15. I have.

  The lower rails 11A and 11B are fixed to the vehicle floor (not shown) via brackets 13A and 13B in such a manner that the longitudinal direction thereof coincides with the longitudinal direction of the vehicle (the left-right direction in FIG. 2). The upper rails 12A and 12B are slidable in the front-rear direction with respect to the lower rails 11A and 11B.

  The seat cushion frame 14 forms a skeletal portion of a seat cushion on which an occupant sits. The lower arms 14A and 14B that make a pair in the vehicle width direction, and a connecting rod 14C that connects the lower arms 14A and 14B at the rear end portion, A pair of support brackets 14D and 14E (see FIGS. 14 and 15) fixed to the rear ends of the lower arms 14A and 14B are provided. The seat cushion frame 14 is supported by the upper rails 12A and 12B in the lower arms 14A and 14B, respectively.

  The seat back frame 15 is rotatably connected to the seat cushion frame 14 at the rear ends of the lower arms 14A and 14B. The seat back frame 15 forms a skeleton part of a seat back (back) that supports the upper body of the occupant from the rear side. The side frames 15A and 15B and the side frames 15A and 15B that are paired in the vehicle width direction are arranged at the upper ends. The upper pipe 15C is connected to the upper pipe 15C, and the horizontally long installation member 15D is fixed to the upper pipe 15C.

  As shown in FIG. 3, the seat back (seat back frame 15) has a seating area for adjusting the tilt angle and a forward tilted area on the front side of the seating area as tilting areas. 16A and 16B are configured to be tiltable with respect to the seat cushion (seat cushion frame 14). This tilting area is based on the “upright position” where the seat back is raised. The seating region is a region sandwiched between the “upright position” and the “largely tilted position” in which the seat back is greatly inclined backward. In the drawing, the angular position of the seat back frame 15 indicated by a solid line is the angular position of the seat back that is most frequently used when a general occupant is seated (hereinafter referred to as “neutral position”). The forward tilt area is an area sandwiched between the “upright position” and the “forward position” where the seat back is tilted forward.

The operation of the seat back that is tilted from the seating area to the “forward position” of the forward tilt area is called “forward tilt”.
In addition, the walk-in mechanism is used to move the seat back forward in order to secure a boarding space when opening the door in a two-door vehicle and getting on and off the second seat, or when getting on and off the third seat from the rear door in a one-box vehicle. This is a mechanism for slidably moving the seat cushion forward relative to the vehicle floor.

  As shown in FIGS. 1 and 2, the vehicle seat device includes seat reclining devices 20A and 20B on both sides in the vehicle width direction. Both seat reclining devices 20A and 20B are for adjusting and maintaining the inclination angle of the seat back relative to the seat cushion, and have the same configuration.

  Each seat reclining device 20A, 20B is disposed between the support brackets 14D, 14E of the seat cushion frame 14 and the side frames 15A, 15B of the seat back frame 15, and includes a spiral spring (not shown), a lock mechanism 30 and the like. A memory mechanism 50 is provided.

  The spiral spring is for urging the seat back in the forward tilt direction, and is formed by bending a wire rod into a spiral shape. One end of the spiral spring is locked to the seat cushion frame 14, and the other end is locked to the seat back frame 15.

  The lock mechanism 30 is a mechanism for switching between a locked state that restricts the tilt of the seat back relative to the seat cushion and an unlocked state that allows the tilt according to the rotation of the operation shafts 16A and 16B.

  The operation shaft 16A in the left seat reclining device 20A and the operation shaft 16B in the right seat reclining device 20B are coupled (rigidly coupled) to each other by a common rod 22 (see FIG. 1) so as to be integrally rotatable. Here, a direction along the operation shafts 16A and 16B is referred to as an “axial direction”.

  As shown in FIGS. 4 to 7, the lock mechanism 30 includes a first member 31 attached to the side frames 15 </ b> A and 15 </ b> B of the seat back frame 15 and a second member attached to the support brackets 14 </ b> D and 14 </ b> E of the seat cushion frame 14. 32 and a holder 33 attached to the first member 31 and the second member 32. Further, the lock mechanism 30 includes a cam 34 and a plurality of (three) lock members 35 disposed between the first member 31 and the second member 32, and one of the second members 32 in the axial direction. And a spiral spring 36 disposed on the side (the right side in FIGS. 4 and 5).

  The second member 32 is formed by half punching (half blanking) and is formed in an annular shape. The second member 32 is substantially integrated with the seat cushion frame 14 by being joined to the support brackets 14D and 14E on one side in the axial direction (the right side in FIG. 7).

  Further, a circular recess 37 is formed on the other side of the second member 32 in the axial direction (left side in FIGS. 4 and 7). As shown in FIGS. 4, 10, and 11, a plurality of (three) guide wall portions 38 that protrude from the bottom wall portion by an axial step are formed in the recess 37 at predetermined angles. These guide wall portions 38 are paired with adjacent guide wall portions 38. The guide wall portion 38 has a side surface 38A that extends straight in the radial direction so as to be parallel to the adjacent guide wall portion 38 that forms a pair (see FIG. 11). A guide groove extending in the radial direction is formed between the adjacent side surfaces 38A. This guide groove is for guiding the radial movement (advance and retreat) of the pole 35.

  As shown in FIG. 5 and FIG. 7, the first member 31 is formed by half punching like the second member 32, and has an outer diameter equivalent to the inner diameter of the inner peripheral surface 37 </ b> A of the concave portion 37. It is formed in the annular | circular shape which has. The first member 31 is substantially integrated with the seat back frame 15 by being joined to the side frames 15A and 15B on the other side in the axial direction (left side in FIG. 7).

  The first member 31 is mounted on the second member 32 such that the outer peripheral surface 31A is in sliding contact with the inner peripheral surface 37A. That is, the first member 31 is pivotally supported by the second member 32. With this pivot support, the seat back frame 15 is rotatably connected to the seat cushion frame 14 via the first member 31 and the second member 32 of the lock mechanism 30.

  When the seat back frame 15 tilts forward, the first member 31 rotates (forward) in the counterclockwise direction in FIG. On the other hand, when the seat back frame 15 tilts backward, the first member 31 rotates (reversely rotates) in the clockwise direction in FIG.

  Further, a first recess 39 that is concentric with the second member 32 and has a circular shape is formed on one side of the first member 31 in the axial direction (the right side in FIG. 7). In the first recess 39, an internal gear 39A is formed on the inner peripheral surface centering on the operation shafts 16A, 16B. Therefore, in a state where the first member 31 is mounted on the second member 32, the internal gear 39A faces the radial direction of the guide groove.

  The first recess 39 is formed with a circular second recess 41 that is concentric with the first recess 39 and has a smaller diameter than the first recess 39. The first recess 39 and the second recess 41 form a housing space for the cam 34 and the pole 35 together with the recess 37 in a state where the first member 31 is mounted on the second member 32.

  The holder 33 is formed in an annular shape, and is attached to the first member 31 and the second member 32 attached thereto from the outside in the radial direction. The first member 31 and the second member 32 are prevented from coming off in the axial direction in a state where relative rotation is allowed by the holder 33.

  As shown in FIGS. 4 and 5, the cam 34 has a plurality of (three) cam portions 34A at predetermined angles from the center of rotation thereof, and the outer surface of these cam portions 34A defines the cam surface 34B. Forming. Each cam portion 34A is formed with a protrusion 34C that protrudes parallel to the axial direction. The cam 34 is rotatably connected to the second member 32 in a mode of being accommodated between the second member 32 and the first member 31. The cam 34 is integrated with the operation shafts 16A and 16B in conjunction with the operation of a first operation lever 61 and a second operation lever 62, which will be described later, on one side (clockwise in FIG. 10, counterclockwise in FIG. 11). Direction).

  As shown in FIGS. 4, 5, and 12, the outer end of the spiral spring 36 is locked to the second member 32, and the inner end is locked to the cam 34. When the operation of the first operation lever 61 and the second operation lever 62 is released, the cam 34 is rotated to the other side (counterclockwise in FIG. 10 and clockwise in FIG. 11) by the spiral spring 36. It is so energized. This urging direction is a direction in which an outer gear 35A of a pole 35 (to be described later) is engaged with an internal gear 39A of the first member 31 by the cam 34 to lock the seat back.

The outer end of the spiral spring 36 may be engaged with the support brackets 14D and 14E of the seat cushion frame 14 instead of the second member 32.
As shown in FIGS. 4, 5, 10 and 11, each of the plurality of (three) poles 35 is slightly larger than the circumferential width of the guide groove (interval between adjacent guide wall portions 38). It is formed in a rectangular plate shape having a small width. Each pole 35 is disposed in the guide groove, and is guided in the radial direction by sliding contact with both side surfaces 38A (see FIG. 11). Outer teeth 35 </ b> A that mesh with the inner gear 39 </ b> A of the first member 31 are formed at the outer end portions of the respective poles 35 in the radial direction. Further, a cam hole 35B penetrating in the thickness direction is formed at the inner end portion of each pole 35. Each cam hole 35B is inclined with respect to the circumferential direction, and each pole 35 is engaged with the protrusion 34C of the cam 34 inserted into the cam hole 35B.

  Further, in each pole 35, a step portion is formed between the external teeth 35A and the cam hole 35B. The end surface of the step portion that faces in the radial direction forms a pole cam surface 35C. The pole cam surface 35C extends so as to cross the side surface of the pole 35 and to have an inclination angle with respect to the pitch circle of the external teeth 35A. The pawl 35 is engaged with the cam surface 34B of the cam 34 by contacting the pawl cam surface 35C.

  Here, in a state where the cam 34 and the pole 35 are accommodated between the second member 32 and the first member 31 (accommodating space), the cam 34 is integrated with the operation shafts 16A and 16B on one side (clockwise direction in FIG. 10). ), The pawl 35 moves so as to be drawn in the radial direction along the guide groove when the cam hole 35B is pressed by the projection 34C of the cam 34. At this time, the engagement between the external teeth 35A of the pole 35 and the internal gear 39A of the first member 31 is released, so that the first member 31 can be rotated with respect to the second member 32, and the seat back is Unlocked.

  On the other hand, when the cam 34 rotates to the other side (counterclockwise direction in FIG. 10), the pole 35 protrudes in the radial direction along the guide groove when the pole cam surface 35C is pressed against the cam surface 34B. Move to. At this time, the external teeth 35A of the pole 35 mesh with the internal gear 39A of the first member 31, the first member 31 becomes unable to rotate with respect to the second member 32, and the seat back is locked.

  The memory mechanism 50 stores the angular position of the seat back in the locked state immediately before switching to the unlocked state, and is in the locked state only when the forward-turned unlocked seat back tilts to the stored angular position. It is a mechanism for allowing the return to.

  The memory mechanism 50 includes engaging portions 53A and 53B, a storage recess 51, a memory plate 52, and a pair of engaged portions 52A and 52B provided on the pair of poles 35, respectively.

  As shown in FIG. 10, the engaging portions 53 </ b> A and 53 </ b> B are respectively provided on a pair of adjacent (upper and left sides in FIG. 10) poles among a plurality (three) of poles 35. More specifically, as shown in FIGS. 4 and 5, in the pole 35, a step portion 54 is formed on the opposite side of the pole cam surface 35C in the axial direction and between the external teeth 35A and the cam hole 35B. The stepped portion 54 is provided with engaging portions 53A and 53B. In the present embodiment, one engagement portion 53A protrudes more radially outward from the step portion 54 than the other engagement portion 53B.

  As shown in FIG. 8, the storage recess 51 is in the axial direction (left-right direction in FIG. 8), and is on the side farther from the second member 32 than the meshing portion with the external teeth 35A of the internal gear 39A (left side in FIG. 8). ). That is, the storage recess 51 is provided adjacent to the side farther from the second member 32 side than the first recess 39. The housing recess 51 is concentric with the first recess 39 and has an inner peripheral surface 51A having the same diameter as the tooth tip circle of the internal gear 39A.

  As shown in FIGS. 10 and 13, the memory plate 52 has an annular shape divided at one place, and can be reduced in diameter by elastically deforming radially inward and elastically deforming radially outward. The diameter can be expanded. The memory plate 52 is housed so as to be slidable in the circumferential direction with respect to the housing recess 51 in a state where the divided portion S is positioned between the engaging portions 53A and 53B and the diameter thereof is reduced.

  The engaged portions 52A and 52B protrude radially inward from locations adjacent to the engaging portions 53A and 53B of the memory plate 52 between the engaging portions 53A and 53B. Both engaged portions 52A and 52B are places where the engaging portions 53A and 53B are engaged and disengaged as the pole 35 moves in the radial direction.

  In the present embodiment, the engaged portion 52B on the front side in the direction in which the first member 31 rotates (forward rotation) when the seat back is tilted forward is provided at one end of the memory plate 52. It is adjacent to the front engaging portion 53B. Further, a rear engaged portion 52A in the direction in which the first member 31 rotates when the seat back is tilted forward is provided at the other end of the memory plate 52, and the rear engagement portion is provided. Adjacent to the joint portion 53A.

  The lengths of the engaged portions 52A and 52B in the radial direction are slid by the engagement portions 53A and 53B over the engaged portions 52A and 52B together with the protruding amounts from the step portions 54 of the engagement portions 53A and 53B. It is an element that determines whether or not it can move, that is, whether or not the angular position of the seat back can be stored. Here, the length of the engaged portion 52B in the radial direction is set to a length that the engaging portion 53B with a small amount of protrusion from the stepped portion 54 can get over. The length of the engaged portion 52A in the radial direction is set to a length that the engaging portion 53A having a large amount of protrusion cannot get over.

  Further, the circumferential lengths of the engaged portions 52 </ b> A and 52 </ b> B are elements that determine the tilting range of the seat back that can be stored by the memory mechanism 50. Here, the engaged portion 52B on which the engaging portion 53B rides and slides is formed long in the circumferential direction. Further, the engaged portion 52A that the engaging portion 53A does not ride on is formed short in the circumferential direction.

The unlocked state by the lock mechanism 30 described above has the following two modes.
Aspect 1: Both engaging portions 53A, 53B are semi-engaged with the engaged portions 52A, 52B in the radial direction, and in this state, the engaged portions 52A, 52B are moved circumferentially by the engaging portions 53A, 53B. A mode in which the seat back is allowed to tilt without storing the angular position by being pressed and rotated integrally with the pole 35 with respect to the storage recess 51 (see FIG. 20).

  Aspect 2: In a state where the engaging portion 53B gets over the engaged portion 52B and the memory plate 52 is non-rotatably locked with respect to the storage recess 51, it slides on the inner peripheral surface 52C of the engaged portion 52B. By being moved, the angle position is memorized and the seat back is allowed to tilt (see FIG. 22). In this aspect, the frictional resistance generated between the outer peripheral surface 52D of the memory plate 52 and the circular inner peripheral surface 51A of the storage recess 51 is between the inner peripheral surface 52C of the engaged portion 52B and the engaging portion 53B. This occurs when the frictional resistance is greater than

  Here, as shown in FIG. 13, in the memory plate 52, an arc-shaped notch 52E is provided at the outer periphery of the portion where the longer engaged portion 52B is provided in the circumferential direction. . Due to the cutout portion 52E, the radial thickness t1 of the memory plate 52 is such that the portion 52F between the engaged portions 52A and 52B in the circumferential direction of the memory plate 52 and the engaged portions 52A and 52B. Among them, the position is set to be the same as the position where the engaging portion 53B slides in the unlocked state in which the tilting of the seat back is allowed after storing the angular position. The place where the engaging portion 53B slides is the engaged portion 52B that is longer in the circumferential direction and shorter in the radial direction. Note that the reference numeral 52G in FIG. 13 restricts the engaged portion 52B from bending outward in the radial direction when the engaging portion 53B slides on the inner peripheral surface 52C of the engaged portion 52B. It is the leg part.

  As shown in FIGS. 1 and 2, in addition to the seat reclining devices 20A and 20B, the vehicle seat device includes a first operation lever 61 (lock release operation lever), a second operation lever 62 (memory operation lever), and A seat slide device 69 is provided.

  The first operation lever 61 is a lever operated when the operation shafts 16 </ b> A and 16 </ b> B are rotated to generate an unlocked state that allows the seat back to tilt without storing the angular position. The first operation lever 61 is disposed on one side (the right side in the present embodiment) in the width direction of the seat cushion.

  As shown in FIGS. 14 and 15, the support bracket 14E on the same side (right side) as the first operation lever 61 is disposed on the same side (right side) as the first operation lever 61 in the width direction of the seat cushion. A part of the operation shaft 16B of the seat reclining device 20B is protruding. The first operation lever 61 is supported so as to be rotatable with respect to the operation shaft 16B. A mechanism for transmitting the movement of the first operation lever 61 to the operation shaft 16B is provided between the first operation lever 61 and the operation shaft 16B, which will be described later.

  As shown in FIG. 1, the second operation lever 62 rotates in the operation shafts 16 </ b> A and 16 </ b> B according to the operation thereof, thereby unlocking the seat back without storing the angular position. Can be generated. The main function of the second operation lever 62 is to allow the seat back to tilt after memorizing the angular position by rotating the operation shafts 16A and 16B more than in the unlocked state. To create an unlocked state. The second operation lever 62 is provided on one side of the seat back in the width direction (the same side as the first operation lever 61: right side).

  The second operation lever 62 is supported by a shaft 63 so as to be rotatable in the vertical direction with respect to the erection member 15D at the upper part of the vehicle seat device. The second operation lever 62 is always urged to rotate downward by a return spring 64. In the installation member 15D, stoppers 67A and 67B are provided above and below the second operation lever 62, and the operation range of the second operation lever 62 is defined by these stoppers 67A and 67B.

  As shown in FIGS. 16 and 17, the support bracket 14 </ b> D on the opposite side (left side) to the second operation lever 62 is disposed on the opposite side (left side) to the second operation lever 62 in the width direction of the seat cushion. A part of the operation shaft 16A of the seat reclining device 20A protrudes. A link member 65 is connected to the operation shaft 16A so as to be integrally rotatable. The link member 65 is always moved in the rotational direction (counterclockwise direction in FIGS. 16 and 17) of the operation shaft 16A when the seat back is locked by the spiral spring 36 (see FIGS. 4 and 5). It is energized.

  The outer end portion of the link member 65 and the second operation lever 62 arranged at a position far away from the link member 65 are drivingly connected by a cable 68, and according to the operation of the second operation lever 62. The movement of the second operation lever 62 is transmitted to the operation shaft 16A via the cable 68 and the link member 65. In FIG. 1 to FIG. 3, an intermediate portion of the cable 68 is not shown.

  A seat slide device 69 shown in FIGS. 1 and 2 is a well-known slide lock mechanism (not shown) that selectively restricts and allows the seat cushion slide movement relative to the vehicle floor (the slide movement of the upper rails 12A and 12B relative to the lower rails 11A and 11B). Abbreviation). The slide lock mechanism restricts the sliding movement of the seat cushion with respect to the vehicle floor at least in the seating region. The slide lock mechanism releases the restriction in conjunction with the lock mechanism being switched to the unlocked state in accordance with the operation of the second operation lever 62 and the seat back being moved forward from the seating area to the front-falling area. . By releasing this restriction, sliding movement of the seat cushion with respect to the vehicle floor is allowed.

  As shown in FIGS. 14 and 15, the vehicle seat device includes an operation range limiting means 70 and a lost motion mechanism 75 on the same side (right side) as the first operation lever 61 in the width direction of the seat cushion.

  The operation range restricting means 70 includes a fixed stopper 71 fixed above the operation shaft 16B and the operation shaft 16B of the first operation lever 61 in the support bracket 14E on the same side (right side) as the first operation lever 61. And a pair of movable stoppers 72A and 72B projecting radially outward from locations separated from each other in the circumferential direction. The rotation operation range α of the first operating lever 61 includes a lock position (see FIG. 14) where the movable stopper 72A comes into contact with the fixed stopper 71 and a release position (see FIG. 15) where the movable stopper 72B comes into contact with the fixed stopper 71. Limited during. This restriction is necessary for generating an unlocked state in which the tilting of the seat back is allowed without storing the angular position by the rotation of the operation shafts 16A and 16B according to the operation of the first operation lever 61. In the locked position, the external teeth 35A of each pole 35 mesh with the internal gear 39A of the first member 31, so that the first member 31 cannot rotate with respect to the second member 32, and the seat back is locked. The Further, at the release position, the meshing between the external teeth 35A and the internal gear 39A is released, the first member 31 can be rotated with respect to the second member 32, and the seat back is unlocked.

  The first operating lever 61 is always urged to rotate (pulled) toward the lock position by a return spring 73 stretched between the support bracket 14E and the first operating lever 61.

  Here, the rotational amounts of the operation shafts 16A and 16B for the unlocked state in which the tilting of the seatback is permitted after the angular position is stored are in the unlocked state in which the tilting of the seatback is permitted without storing the angular position. More than the rotation amount of the operation shafts 16A and 16B for the purpose.

  On the other hand, the unlocked state that allows tilting of the seat back without storing the angular position is mainly caused by the operation of the first operation lever 61, and unlocks that allows tilting of the seat back after storing the angular position. The state is generated only by operating the second operation lever 62. Accordingly, the rotation amounts of the operation shafts 16A and 16B due to the operation of the second operation lever 62 are larger than the rotation amounts of the operation shafts 16A and 16B due to the operation of the first operation lever 61.

  Further, the operation shafts 16A and 16B rotated by the operation of the first operation lever 61 and the operation shafts 16A and 16B rotated by the operation of the second operation lever 62 rotate integrally (a common shaft). ).

  The lost motion mechanism 75 rotates a common shaft (operation shafts 16A and 16B) by operating the operation levers 61 and 62. When the second operation lever 62 is operated, the motion is transmitted to the first operation lever 61. This is a mechanism for restricting the movement of the operation shafts 16A and 16B more than when the first operation lever 61 is operated.

  For this reason, the lost motion mechanism 75 stores the angular position and at least when the second operation lever 62 is operated to generate an unlocked state that allows the seat back to tilt, the second operation lever 62 The first operation lever 61 is stopped without transmitting the movement of the first operation lever 61 to the first operation lever 61.

  In the present embodiment, the lost motion mechanism 75 is configured such that when the second operation lever 62 is operated, the movement of the second operation lever 62 is not transmitted to the first operation lever 61 at all.

  More specifically, the lost motion mechanism 75 includes a link member 76, a long hole 77, and a pin 78, and the cable 68 that connects the second operation lever 62 and the operation shaft 16A (link member 65). Has been. As described above, the first operating lever 61 is rotatably supported with respect to the operating shaft 16B, while the link member 76 is connected to the operating shaft 16B so as to be integrally rotatable. Further, the link member 76 is always moved in the direction of rotation of the operation shaft 16B (clockwise direction in FIGS. 14 and 15) when the seat back is locked by the spiral spring 36 (see FIGS. 4 and 5). It is energized.

  The long hole 77 is provided in the link member 76 and has an arc shape centered on the operation shaft 16B. The pin 78 is fixed to the first operation lever 61 and is inserted into the elongated hole 77 so as to be movable in the circumferential direction.

  In the lost motion mechanism 75 configured as described above, when the first operation lever 61 is operated within the rotation operation range α (between the lock position and the release position), the pin 78 has one end (front end) of the elongated hole 77. Pressed. This is because the urging force in the clockwise direction of FIG. 14 by the spiral spring 36 acts on the link member 76. Therefore, the link member 76 rotates integrally with the first operation lever 61. As the link member 76 rotates, the operation shaft 16B, the rod 22, the operation shaft 16A, and the link member 65 rotate together in the same direction. At this time, the link member 65 rotates in the clockwise direction from the state of FIG. 16, but since the cable 68 is bent, this rotation is not transmitted to the second operation lever 62.

  Further, when the second operation lever 62 is operated, the movement of the pin 78 within the long hole 77 is allowed. By changing the position of the pin 78 in the long hole 77, the movement of the second operation lever 62 is not transmitted to the first operation lever 61, and the first operation lever 61 is stopped.

  Further, as shown in FIGS. 5, 18, and 19, in the vehicle seat device, when the first operating lever 61 is operated, the locking mechanism 30 switches between the locked state and the unlocked state, and the seat back is used for the seating region. A switching restriction mechanism 80 is provided that restricts only when tilting within.

  The switching restriction mechanism 80 includes a rotation restricting portion 81 provided in the first member 31 so as to be integrally rotatable. More specifically, the rotation restricting portion 81 includes an arc-shaped protrusion that protrudes radially inward from the inner peripheral surface of the second recess 41.

  The rotation restricting portion 81 is provided at a location that satisfies the following condition in the circumferential direction of the first member 31. The condition is: "The seat back is tilted in the seating area in an unlocked state that allows tilting of the seat back without memorizing the angular position, and tilted forward to the upright position at the boundary with the forward tilting area. Is the position where the engaged portion 52B is pressed to contact the engaging portion 53B of the pole 35 rotating integrally with the memory plate 52 ". The contact with the rotation restricting portion 81 restricts the engaging portion 53B and the memory plate 52 from further turning in the same direction, thereby preventing the seat back from tilting from the seating region to the forward tilting region. Is done.

  In this way, the rotation restricting portion 81 is accompanied by the memory plate 52 when the seat back tilts from the seating area to the forward tilting area in an unlocked state that allows tilting of the seat back without storing the angular position. Then, it abuts on the rotating pole 35 and restricts further rotation in the same direction. Due to this restriction, the rotation restricting portion 81 performs the above restriction of switching between the locked state and the unlocked state by the lock mechanism 30.

  The rotation restricting portion 81 has an inner peripheral surface 81A having the same diameter as the inner peripheral surface 52C of the engaged portion 52B on which the engaging portion 53B slides. The reason why the inner peripheral surface 52C and the inner peripheral surface 81A have the same diameter as described above is as follows. When the second operating lever 62 is operated, the engaging portion 53B is allowed to move over the engaged portion 52B and the rotation restricting portion 81 and slide on the inner peripheral surface 52C of the engaged portion 52B. This is because the tilting of the seat back from the seating area to the forward tilting area is allowed.

  Since the second recess 41 provided with the rotation restricting portion 81 is located on the side farther from the second member 32 than the storage recess 51 in which the memory plate 52 is accommodated, the rotation restricting portion 81 is The rotation of the memory plate 52 in the storage recess 51 is not hindered.

  By the way, as already described, one engaging portion 53A protrudes from the step portion 54 to the outside in the radial direction. The engaged portion 52A adjacent to the engaging portion 53A is short in the circumferential direction and long in the radial direction. On the other hand, the other engaging portion 53B protrudes slightly outward from the step portion 54 in the radial direction. The engaged portion 52B adjacent to the engaging portion 53B is long in the circumferential direction and short in the radial direction. One of the reasons for this setting is that when the seat back is tilted forward, the engaging portion 53B with a small amount of protrusion is allowed to get over the engaged portion 52B that is short in the radial direction. This is because the angular position of the seat back is stored. Further, when the seat back is tilted rearward, the engagement portion 53A having a large amount of protrusion is prevented from getting over the engaged portion 52A that is long in the radial direction, and the angular position of the seat back is not stored. This is because the seat back is locked at the angular position.

The vehicle seat device of the first embodiment is configured as described above. Next, the operation of the vehicle seat device will be described.
As shown in FIG. 13, in the memory plate 52 of the vehicle seat device, the engaging portion 53B of the pole 35 slides in the unlocked state in which the angle position is stored and the seat back is allowed to tilt. Is a part of the inner peripheral surface 52C of the engaged portion 52B protruding inward in the radial direction. The sliding part is located on the inner side in the radial direction than the part 52F between the engaged portions 52A and 52B in the circumferential direction of the memory plate 52.

  Here, assuming that the outer diameter of the memory plate 52 is the same everywhere in the circumferential direction, the radial thickness t1 is the latter (the engaged portion 52B on which the engaging portion 53B slides) in the latter ( It becomes larger than the location 52F) between the engaged portions 52A and 52B. A portion where the thickness t1 is large is less likely to bend in the radial direction than a small portion. Therefore, when the diameter of the memory plate 52 is reduced while being bent inward in the radial direction in order to incorporate the memory plate 52 into the storage recess 51, the memory plate 52 may become an irregular ring shape and may not be easily fitted into the storage recess 51.

  In this regard, in the first embodiment, the thickness t1 is determined by the portion 52F between the engaged portions 52A and 52B in the circumferential direction of the memory plate 52 and the engaged portion 52B on which the engaging portion 53B slides. They are set the same. Therefore, when the memory plate 52 is reduced in diameter while being bent inward in the radial direction in order to incorporate the memory plate 52 into the storage recess 51, the memory plate 52 is unlikely to be an irregular ring shape.

  In the vehicle seat device, the seat reclining devices 20A and 20B provided on both sides of the seat cushion in the width direction have the same structure including the same lock mechanism 30 and the same memory mechanism 50. ing. In addition, in the seat reclining devices 20A and 20B, the operation shafts 16A and 16B related to the operation of the lock mechanism 30 and the memory mechanism 50 are connected to each other by the rod 22 so as to be integrally rotatable. Therefore, when the first operating lever 61 and the second operating lever 62 are operated and the operating shafts 16A and 16B are rotated, the lock mechanism 30 in both the seat reclining devices 20A and 20B operates in synchronism with the memory mechanism. 50 operate in synchronism as follows.

  10 and 11 show the state of the seat reclining devices 20A and 20B when the seat back is locked at the neutral position in the seating area. In this locked state, each pawl 35 attached to the second member 32 is pressed radially outward by the cam 34, and the external teeth 35 </ b> A for each pawl 35 mesh with the internal gear 39 </ b> A of the first member 31. . By these engagements, the relative rotation of the first member 31 and the second member 32 is restricted, and the tilt of the seat back with respect to the seat cushion is restricted.

  At this time, the first operating lever 61 urged by the return spring 73 in the clockwise direction in FIG. 14 is moved to the locked position by the left movable stopper 72A in FIG. Is stationary.

  Further, the link member 76 that is urged to rotate in the clockwise direction of FIG. 14 by the spiral spring 36 is stationary at a position where the front end portion of the elongated hole 77 contacts the pin 78 of the first operation lever 61.

  When switching from the locked state to the unlocked state that allows tilting of the seat back without storing the angular position and adjusting the tilt angle of the seat back, the first operating lever 61 in the locked position is held. Then, an upward rotation operation (lifting operation) is performed against the return spring 73. The upward rotation of the first operation lever 61 stops at the release position (see FIG. 15) where the right movable stopper 72B in FIG.

  As described above, when the first operation lever 61 is operated from the lock position toward the release position, the urging force in the clockwise direction of FIG. 14 by the spiral spring 36 is acting on the link member 76. Therefore, the pin 78 continues to be positioned at the front end portion of the long hole 77 (does not move in the long hole 77). Therefore, the link member 76 rotates integrally with the first operation lever 61. As the link member 76 rotates, the operation shaft 16B, the rod 22, the operation shaft 16A, and the link member 65 rotate together in the same direction. The link member 65 rotates clockwise from the state shown in FIG. 16, but the cable 68 is bent, so that the rotation is not transmitted to the second operation lever 62.

  When each cam 34 is rotated in the clockwise direction of FIG. 20 integrally with the operation shafts 16A and 16B in accordance with the rotation operation from the lock position to the release position of the first operation lever 61, each pole 35 is When the cam hole 35B is pressed by the protrusion 34C of the cam 34, the cam hole 35B moves so as to be drawn inward in the radial direction along the guide groove. At the beginning of this movement period, the engagement of the external teeth 35A of each pole 35 and the internal gear 39A of the first member 31 is released, so that the first member 31 can rotate with respect to the second member 32. Thus, the seat back is unlocked.

  As the poles 35 move inward in the radial direction, the engaging portions 53A and 53B of the poles 35 also move inward in the radial direction. Due to the movement of the engaging portions 53A and 53B, the amount of engagement between the engaging portions 53A and 53B and the engaged portions 52A and 52B adjacent to each other decreases.

  When the first operating lever 61 is rotated to the release position, as shown in FIG. 20, the amount of engagement between the engaging portions 53A and 53B of the pole 35 and the engaged portions 52A and 52B adjacent to each other is as described above. It is about half of the locked state. That is, both the engaging portions 53A and 53B are half-engaged in the radial direction with respect to the adjacent engaged portions 52A and 52B.

  As described above, the operation shafts 16A and 16B are rotated in accordance with the operation of the first operation lever 61, thereby generating an unlocked state in which the seat back is allowed to tilt without storing the angular position.

  In this unlocked state, when the seat back biased forward by the spiral spring is tilted forward, the first member 31 rotates (rotates forward) in the counterclockwise direction of FIG. The engaged portion 52B that is long in the direction and short in the radial direction is pressed by the engaging portion 53B. Contrary to the above, when the seat back is tilted backward, the first member rotates in the clockwise direction of FIG. 20 (rotates backward), and the engaged portion 52A which is short in the circumferential direction and long in the radial direction is adjacent. Is pressed by the engaging portion 53A.

  When the seat back is tilted forward or backward, the pressing force of the engaging portions 53A and 53B is applied between the outer peripheral surface 52D of the memory plate 52 and the inner peripheral surface 51A of the storage recess 51. By overcoming the frictional resistance, the memory plate 52 is rotated integrally with the pole 35. During this rotation, the memory plate 52 slides on the inner peripheral surface 51 </ b> A of the storage recess 51.

  Here, as with a general seat reclining device, the first operation lever 61 can be used to switch between the locked state and the unlocked state in the lock mechanism 30 when the seat back is at any angular position in the tilting region. Suppose that In this case, when adjusting the inclination angle of the seat back by operating the first operation lever 61, if the seat back is accidentally tilted in the forward tilt region, the slide lock mechanism (not shown) of the seat slide device is used. There is a risk that the restriction on slide movement will be released unintentionally.

  In this regard, in the present embodiment, the forward tilt and the backward tilt of the seat back at the neutral position are allowed in the seating area (between the upright position and the large tilt position). When the seat back is tilted in this seating area, the rotation restricting portion 81 in the first member 31 pushes the engaged portion 52B and rotates integrally with the memory plate 52 as shown by a two-dot chain line in FIG. There is no contact with the engaging portion 53B of the moving pole 35. That is, the rotation restricting portion 81 does not hinder the integral rotation of the engaging portion 53B of the pole 35 and the memory plate 52.

  On the other hand, when the seat back is tilted forward from the neutral position to the upright position, as shown in FIG. 19, the rotation restricting portion 81 presses the engaged portion 52B and rotates integrally with the memory plate 52. It abuts on the engaging portion 53B of the pole 35. By this contact, the rotation restricting portion 81 restricts the engaging portion 53B and the memory plate 52 from further rotating in the same direction. Therefore, the lock mechanism 30 can be switched between the locked state and the unlocked state, and the tilt angle can be adjusted in the forward tilt region (between the forward tilt position and the upright position), which is the tilt region ahead of the upright position. It becomes impossible.

  Here, in the present embodiment, the divided portion S of the memory plate 52 is located between the engaging portions 53A and 53B for each pair of adjacent poles 35. In addition, the pair of engaged portions 52A and 52B of the memory plate 52 are located at positions adjacent to the engaging portions 53A and 53B between the engaging portions 53A and 53B. That is, the engaged portion 52A is located between the divided portion S and the engaging portion 53A, and the engaged portion 52B is located between the divided portion S and the engaging portion 53B.

  Therefore, when one engaging portion 53A presses the adjacent engaged portion 52A in the circumferential direction (counterclockwise direction in FIG. 19), the other engaging portion 53B is adjacent to the engaged portion 52B. Is not pressed in the circumferential direction. The direction in which one engaging portion 53A presses the engaged portion 52A in the circumferential direction is a direction in which the interval between the divided portions S of the memory plate 52 is narrowed. Contrary to the above, when the other engaging portion 53B presses the adjacent engaged portion 52B in the circumferential direction (clockwise direction in FIG. 19), one engaging portion 53A is adjacent to the engaged portion. The part 52A is not pressed in the circumferential direction. The direction in which the other engaging portion 53B presses the engaged portion 52B in the circumferential direction is a direction in which the interval between the divided portions S of the memory plate 52 is narrowed. By applying a pressing force in the direction of narrowing the interval between the divided portions S, the memory plate 52 is reduced in diameter when the seat back is tilted. As the diameter is reduced, the friction generated between the outer peripheral surface 52D of the memory plate 52 and the inner peripheral surface 51A of the storage recess 51 is reduced.

  In the present embodiment, the portion 52F between the engaged portions 52A and 52B in the circumferential direction of the memory plate 52 and the engaging portions 53A and 53B of the engaged portions 52A and 52B slide. The thickness t1 is set to be the same at the place (the engaged portion 52B where the engaging portion 53B slides) (see FIG. 13). Therefore, when the pressing force in the direction of narrowing the interval between the divided portions S is applied from the engaging portion 53B to the engaged portion 52B, and the memory plate 52 is rotated integrally with the pole 35 with respect to the storage recess 51. In addition, the diameter of the memory plate 52 is difficult to be reduced to an irregular ring shape (the diameter is reduced to a uniform ring shape). Therefore, it is possible to prevent an excessive frictional force from being locally generated at any location in the circumferential direction between the outer peripheral surface 52D of the memory plate 52 and the inner peripheral surface 51A of the storage recess 51.

  When the seat back reaches the desired inclination angle, as shown in FIGS. 14 and 15, when the upward rotation operation (pull-up operation) of the first operation lever 61 is stopped, the return spring 73 biases the rotation. The 1st operation lever 61 currently made is rotated below. The downward rotation of the first operation lever 61 stops at the locked position where the left movable stopper 72A in FIG.

  As described above, when the first operation lever 61 is returned from the release position to the lock position, the urging force in the clockwise direction of FIG. 14 by the spiral spring 36 acts on the link member 76. The pin 78 continues to be positioned at the front end of the long hole 77 (does not move in the long hole 77). Therefore, the link member 76 is integrated with the first operation lever 61 and rotates in the clockwise direction of FIG. As the link member 76 rotates, the operation shaft 16B, the rod 22, the operation shaft 16A, and the link member 65 rotate together in the same direction. The link member 65 rotates counterclockwise from the state of FIG. 17, but the bent cable 68 is pulled, so that the rotation is not transmitted to the second operation lever 62.

  When the cam 34 receiving the biasing force of the spiral spring 36 is rotated in the counterclockwise direction in FIG. 20 as the first operating lever 61 is returned from the release position to the lock position, each pole 35 is turned into a pole cam. When the surface 35C is pressed by the cam surface 34B, the surface 35C moves so as to jump out in the radial direction along the guide groove. By this movement, when the external teeth 35A of the pole 35 and the internal gear 39A of the first member 31 mesh with each other, the first member 31 becomes unrotatable with respect to the second member 32 and has a desired inclination angle. The seat back is locked.

  As the poles 35 move outward in the radial direction, the engaging portions 53A and 53B of the pole 35 also move outward in the radial direction. Due to the radially outward movement of the engaging portions 53A, 53B, the amount of engagement between the engaging portions 53A, 53B and the adjacent engaged portions 52A, 52B increases. That is, the engaging portions 53A and 53B return to the positions when they are locked.

  By the way, the locked state at the neutral position in FIGS. 10 and 11 is switched from the locked state at the neutral position to the unlocked state in which the tilting of the seat back is permitted after the angular position (neutral position) is memorized, and the seat back is tilted forward. In this case, the second operation lever 62 shown in FIG. 1 is gripped, and the second operation lever 62 is operated upward against the return spring 64. The upward movement of the second operation lever 62 due to this operation is transmitted to the link member 65 of the left seat reclining device 20A via the cable 68, and the link member 65 is accompanied by the operation shaft 16A. It rotates in the clockwise direction of FIG. The rotation of the operation shaft 16A is transmitted through the rod 22 to the operation shaft 16B of the right seat reclining device 20B. By this transmission, the operation shaft 16B is integrated with the link member 76 and rotates counterclockwise in FIGS. Since the link member 76 is connected to the first operation lever 61 via the long hole 77 and the pin 78, the link member 76 is rotated as long as the rear end portion of the long hole 77 does not contact the pin 78. 1 Not transmitted to the operation lever 61. That is, during the period in which the pin 78 located at the front end of the long hole 77 moves in the long hole 77, the operation shaft 16B rotates but the first operation lever 61 stops rotating.

  As the two operation shafts 16A and 16B are rotated in accordance with the operation of the second operation lever 62, the cams 34 are integrated with the operation shafts 16A and 16B and are clockwise with respect to the first member 31 in FIG. When pivoted, each pole 35 moves so as to be drawn inward in the radial direction along the guide groove when the cam hole 35B is pressed by the projection 34C of the cam 34. At the beginning of this movement period, the engagement of the external teeth 35A of each pole 35 and the internal gear 39A of the first member 31 is released, so that the first member 31 can rotate with respect to the second member 32. Thus, the seat back is brought into the unlocked state.

  As the second operating lever 62 is pulled up, each pole 35 moves radially inward. The engaging portions 53A and 53B for each pole 35 also move radially inward. This movement reduces the amount of engagement between the engaging portions 53A and 53B and the adjacent engaged portions 52A and 52B.

  When the second operation lever 62 is pulled up until it comes into contact with the upper stopper 67A, as shown in FIG. 21, the engaging portion 53B of one pole 35 is engaged with the adjacent engaged portion 52B. It will be in the state which got over the to-be-engaged part 52B. Each pole 35 can be rotated in the clockwise direction in FIG. 21 with respect to the memory plate 52 (the first member 31 can be rotated in the counterclockwise direction in FIG. 21 with respect to the memory plate 52). These rotation directions are directions in which the seat back is tilted forward.

  At this time, the engaging portion 53A of the other pole 35 is still engaged with the adjacent engaged portion 52A and does not get over the engaged portion 52B. Therefore, even when the second operation lever 62 is pulled up, each pole 35 is rotated counterclockwise in FIG. 21 with respect to the memory plate 52 (the first member 31 is rotated with respect to the memory plate 52 in FIG. It is not possible to turn it around). These rotation directions are directions in which the seat back is tilted backward. Therefore, when the seat back is tilted rearward, the angular position of the seat back cannot be stored, and the seat back can be locked at an arbitrary angle.

  In the above state where the engaging portion 53B gets over the engaged portion 52B, unlike the case of the half-engagement described above, one engaging portion 53B does not press the engaged portion 52B in the circumferential direction. Accordingly, the diameter of the memory plate 52 is not reduced by the pressing of the engaging portion 53B, and the friction generated between the outer peripheral surface 52D of the memory plate 52 and the inner peripheral surface 51A of the storage recess 51 is reduced with the reduction in diameter. Thus, the sliding resistance does not decrease.

  Thus, the frictional resistance between the outer peripheral surface 52D of the memory plate 52 and the inner peripheral surface 51A of the storage recess 51 is large. For this reason, when the seat back biased forward by the spiral spring is tilted forward (tilted forward) in the above state, the memory plate 52 is moved into the storage recess 51 as shown in FIG. On the other hand, the engaging portion 53B slides on the inner peripheral surface 52C of the engaged portion 52B while being locked so as not to rotate.

  Since the rotation restricting portion 81 provided on the first member 31 has an inner peripheral surface 81A having the same diameter as the inner peripheral surface 52C of the engaged portion 52B, the engaging portion 53B is shown in FIG. Can slide on the inner peripheral surface 81A of the rotation restricting portion 81 indicated by a two-dot chain line. The rotation restricting portion 81 does not prevent the engaging portion 53B from sliding on the inner peripheral surface 52C of the engaged portion 52B. There is no rotation restriction by the rotation restriction portion 81, and tilting from the seat back seating area to the forward tilting area is allowed.

  Since the memory plate 52 does not rotate with respect to the first member 31 as described above, both the engaged portions 52A and 52B are held at the positions in the locked state immediately before switching to the unlocked state. . In this manner, the angular position of the seat back in the locked state immediately before switching to the unlocked state is stored.

  Therefore, unlike in Patent Document 1, the surface pressure between the memory plate 52 and the storage recess 51 is reduced for the unlocked state in which the tilt of the seat back is allowed without memorizing the angular position. Even if the friction between the storage recess 52 and the storage recess 51 is not reduced, the operation load when adjusting the seat back to have a desired inclination angle can be made appropriate. When the surface pressure is reduced, the memory plate 52 can be kept non-rotatably locked with respect to the storage recess 51 in the unlocked state in which the angle position is memorized and the seat back is allowed to tilt. It is difficult to rotate the memory plate 52 together with the pole 35 (co-rotation). However, in the present embodiment, such a phenomenon hardly occurs and the original memory function is exhibited.

  In conjunction with the forward movement, the restriction of the slide movement by the slide lock mechanism (not shown) in the seat slide device 69 is released. By releasing the restriction, the seat cushion slides forward with respect to the vehicle floor.

  When the seatback is caused from the forwardly tilted position (tilted backward), the engaging portion 53B is engaged with the inner circumferential surface 52C of the engaged portion 52B in a state in which the memory plate 52 is non-rotatably locked with respect to the storage recess 51. The top slides in the opposite direction to that of the forward movement. At this time, both the engaged portions 52A and 52B are held at the positions in the locked state immediately before switching to the unlocked state.

  Then, when the inclination angle of the seat back becomes the stored inclination angle immediately before the forward movement and the engaging portion 53B passes through the engaged portion 52B, the cam 34 that receives the urging force of the spiral spring 36 is The one member 31 is rotated counterclockwise in FIG. By this rotation, each pole 35 moves so as to jump out in the radial direction along the guide groove when the pole cam surface 35C is pressed against the cam surface 34B. By this movement, when the external teeth 35A of the pole 35 and the internal gear 39A of the first member 31 mesh as shown in FIG. 10, the first member 31 becomes unrotatable with respect to the second member 32, and the seat The bag is locked at an angular position (neutral position) immediately before being moved forward.

  Here, as shown in FIG. 8, the storage is provided adjacent to the side (left side in FIG. 8) in the axial direction and farther from the second member 32 than the meshing portion of the internal gear 39A with the external teeth 35A. A memory plate 52 is accommodated in the recess 51 so as to be slidable in the circumferential direction. Between the memory plate 52 and the second member 32, a pole 35 having external teeth 35A facing the internal gear 39A is located. Since each pole 35 moves in the radial direction, the external teeth 35A mesh with the internal gear 39A, and the meshing is released, so that the circumference of each pole 35 can be moved in the radial direction. There are not a few gaps to do this.

  For example, as shown in FIG. 9, if the inner peripheral surface 51A of the storage recess 51 has a smaller diameter than the tooth tip circle of the internal gear 39A, it is between the storage recess 51 and the internal gear 39A in the radial direction, There is a gap G1 between the storage recess 51 and the pole 35 in the axial direction.

  Further, the memory plate 52 accommodated in the accommodating recess 51 in a reduced diameter state tends to be expanded by its own elastic restoring force. When the memory plate 52 is tilted by the force to increase the diameter and is detached from the storage recess 51, the memory plate 52 enters the gap G1 as shown by an arrow in FIG. 9 and hinders the operation of the lock mechanism 30 and the memory mechanism 50. There is a fear.

  In this regard, in the present embodiment, as shown in FIG. 8, the housing recess provided adjacent to the side (left side in FIG. 8) farther from the second member 32 than the meshing portion of the internal gear 39A with the external teeth 35A. 51 supports the outer peripheral surface 52D of the memory plate 52 by the inner peripheral surface 51A having the same diameter as the tip circle of the internal gear 39A. Therefore, in the present embodiment, there is no gap G1 as described above between the storage recess 51 and the internal gear 39A in the radial direction and between the storage recess 51 and the pole 35 in the axial direction. Therefore, even if the memory plate 52 is tilted in the axial direction due to the force to expand the diameter and is detached from the storage recess 51, there is no possibility of affecting the operation of the lock mechanism 30 or the memory mechanism 50.

According to the first embodiment described in detail above, the following effects can be obtained.
(1) When the first operation lever 61 is operated, a switching restriction mechanism 80 is provided that restricts switching between the locked state and the unlocked state by the lock mechanism 30 only when the seat back tilts in the seating area (see FIG. 18, FIG. 19).

  Therefore, when adjusting the tilt angle of the seat back by operating the first operating lever 61, the seat back is erroneously tilted in the forward tilting region, and the restriction of the slide movement by the slide lock mechanism of the seat slide device 69 is released. Can be suppressed.

  (2) As the switching restriction mechanism 80, the rotation restricting portion 81 having an inner peripheral surface 81A having the same diameter as the inner peripheral surface 52C of the engaged portion 52B in which the engaging portion 53B slides is provided in the first member 31. (FIGS. 18 and 19). When the first operating lever 61 is operated, the engaging portion 53B in a half-engaged state is brought into contact with the rotation restricting portion 81 (FIG. 19) to restrict the rotation of the pole 35 with the memory plate 52. The tilting of the seat back from the seating area to the forward tilting area is prevented. Further, when the second operation lever 62 is operated, the engaged portion 53B gets over the engaged portion 52B and the rotation restricting portion 81 and is slid on the inner peripheral surface 52C of the engaged portion 52B (FIG. 22). Thus, tilting of the seat back from the seating area to the forward tilting area is allowed.

For this reason, the effect described in said (1) can be acquired reliably by simple structure that the rotation control part 81 is provided in the 1st member 31. FIG.
(Second Embodiment)
Next, a second embodiment embodying the present invention will be described with reference to FIGS.

  The second embodiment is greatly different from the first embodiment provided inside in that the switching restriction mechanism 80 is provided outside the seat reclining devices 20A and 20B. The target seat reclining device is the seat reclining device 20A on the side (left side) where the second operation lever 62 is drivingly connected to the operation shaft 16A via the cable 68 and the link member 65.

The switching restriction mechanism 80 in the second embodiment includes a contacted portion 91, a movable stopper 92, the link member 65, and a rotation transmission control means 95.
The contacted portion 91 is fixed to the left side frame 15A of the seat back frame 15, and is displaced around the operation shaft 16A as the seat back tilts.

  The movable stopper 92 is the left support bracket 14D, and is supported by a shaft 93 at a location in front of the operation shaft 16A. The movable stopper 92 includes a contact position (see FIG. 23) that restricts the tilt of the seat back by contact with the contacted portion 91, and a non-contact position that is retracted from the contact position toward the operation shaft 16A ( It tilts between (see FIG. 24).

The link member 65 can transmit the rotation of the operation shafts 16 </ b> A and 16 </ b> B accompanying the operation of the second operation lever 62 to the movable stopper 92.
The rotation transmission control means 95 is fixed to the link member 65 while being inserted through the cam hole 96 formed in the movable stopper 92, and around the operation shaft 16A as the link member 65 rotates. And a pin 97 that displaces.

The cam hole 96 is formed in a shape that satisfies the following conditions.
Condition 1: Operation of the first operation lever 61 and the second operation lever 62 for rotating the operation shafts 16A and 16B by an angle for causing an unlocked state that allows tilting of the seat back without storing the angular position is performed. When performed (when rotated within the rotation operation range α), the rotation of the link member 65 is not transmitted to the movable stopper 92.

  Condition 2: The link member is operated when the second operation lever 62 that rotates the operation shafts 16A and 16B is operated more than when the unlocked state in which the tilt of the seat back is allowed without storing the angular position is generated. The rotation of 65 is transmitted to the movable stopper 92.

  When the condition 1 is satisfied, the movable stopper 92 is positioned at the contact position, and the forward tilt of the seat back is restricted. Due to this restriction, switching between the locked state and the unlocked state is limited only when the seat back tilts in the seating area.

  When the condition 2 is satisfied, the movable stopper 92 is retracted to the non-contact position, and the restriction on the forward tilt of the seat back is released. It is allowed to move forward from the seat back seating area to the front tilting area.

Other configurations are the same as those in the first embodiment. Therefore, in 2nd Embodiment, the same code | symbol is attached | subjected about the member, location, etc. similar to 1st Embodiment, and detailed description is abbreviate | omitted.
In the second embodiment configured as described above, the first operation lever that rotates the operation shafts 16A and 16B by an angle for causing an unlocked state that allows the seat back to tilt without storing the angular position. When the operation of 61 and the second operation lever 62 is performed, as shown in FIG. 23, the link member 65 rotates integrally with the operation shaft 16A. Accordingly, the pin 97 moves around the operation shaft 16A in the cam hole 96 as indicated by a two-dot chain line in FIG. At this time, the rotation of the link member 65 is not transmitted to the movable stopper 92 through the pin 97 and the cam hole 96. In other words, the rotation of the link member 65 transmitted to the movable stopper 92 is blocked by the pin 97 moving in the cam hole 96. By this interruption, the movable stopper 92 is positioned at the contact position and contacts the contacted portion 91, thereby restricting the tilting of the contacted portion 91, and thus the seat back, forward. Due to this restriction, switching between the locked state and the unlocked state by the first operating lever 61 is limited only when the seat back tilts in the seating area.

  For the second operation lever 62, as shown by a solid line in FIG. 24, the operation shafts 16A and 16B are rotated more than when the unlocked state in which the tilt of the seatback is allowed without storing the angular position is generated. When the first operation lever 61 is operated, the number of link members 65 is larger than that when the first operation lever 61 is operated, and the operation shafts 16A and 16B rotate integrally. The rotation of the link member 65 is transmitted to the movable stopper 92 through the pin 97 and the cam hole 96, and the movable stopper 92 is retracted to the non-contact position in FIG. By this retreat, the restriction of the forward tilt of the seat back is released, and the second operation lever 62 allows the seat back to be moved forward from the seat back area to the front tilt area.

Therefore, according to the second embodiment, in addition to the same effect as the above (1) of the first embodiment, the following effect can be obtained.
(3) As the switching restriction mechanism 80, the contacted portion 91, the movable stopper 92, the link member 65, and the rotation transmission control means 95 are provided outside the seat reclining devices 20A and 20B (FIGS. 23 and 24). .

Therefore, although it is a different structure from 1st Embodiment which provides the rotation control part 81 in the 1st member 31, the effect described in said (1) can be acquired reliably.
(4) The rotation transmission control means 95 includes a cam hole 96 formed in the movable stopper 92 and a pin 97 provided in the link member 65 and inserted through the cam hole 96 (FIGS. 23 and 23). 24).

Therefore, the rotation transmission control means 95 can be established with such a simple configuration.
Note that the present invention can be embodied in another embodiment described below.

  A location where at least one of the engaged portions 52A and 52B is different from the end portion of the memory plate 52 on the condition that the engaging portions 53A and 53B are adjacent to the engaging portions 53A and 53B. May be provided.

  The engaged portions 52A and 52B in the memory plate 52 may be changed to a form different from the first and second embodiments. For example, a recess may be provided on the inner peripheral side of the memory plate 52 and this may be used as the engaged portion.

  -You may change the structure of the locking mechanism 30 suitably. For example, you may change the number of the cam parts 34A of the cam 34, or the pole 35 engaged with this. Further, the shapes of the cam portion 34A of the cam 34 and the cam hole 35B of the pole 35 may be appropriately changed.

The elongated hole 77 in the lost motion mechanism 75 may be provided in the first operation lever 61 and the pin 78 may be provided in the link member 76.
In the first embodiment, the operation shafts 16A and 16B for each of the seat reclining devices 20A and 20B are connected so as to be integrally rotatable by the rod 22 disposed therebetween, but the operation shafts 16A and 16B are shared (one) ) Rod.

Contrary to the second embodiment, the cam hole 96 may be formed in the link member 65 and the pin 97 may be provided in the movable stopper 92.
Contrary to the first and second embodiments, the first member 31 is attached to the seat cushion side member (for example, the support brackets 14D and 14E), and the second member 32 is seat back side member (for example, the side member). You may change into the structure attached to flame | frame 15A, 15B).

  The length in the radial direction of the engaged portion 52A may also be set to a length that the engaging portion 53A can get over, like the engaged portion 52B. In this way, not only when the seat back is tilted forward, but also when the seat back is tilted backward, the angular position of the seat back can be stored.

  As shown in FIG. 25, in the internal gear 39A, in the axial direction (left-right direction in FIG. 25), the side farther from the second member 32 than the meshing portion with the external teeth 35A of the internal gear 39A (FIG. 25). The left side) may be the storage recess 51. In this case, the storage recess 51 supports the outer peripheral surface 52D of the memory plate 52 with the tooth tip of the internal gear 39A.

  Even in this case, there is no gap G1 between the storage recess 51 and the internal gear 39A in the radial direction and between the storage recess 51 and the pole 35 in the axial direction. Therefore, as in the first and second embodiments, even if the memory plate 52 is tilted by the force to increase the diameter and is detached from the storage recess 51, the operation of the lock mechanism 30 or the memory mechanism 50 is not hindered. Can be.

  16A, 16B ... operating shaft, 30 ... lock mechanism, 31 ... first member, 32 ... second member, 35 ... pole (lock member), 35A ... external teeth, 39A ... internal gear, 50 ... memory mechanism, 51 ... storage Recessed portion, 52 ... Memory plate, 52A, 52B ... engaged portion, 52C, 81A ... inner peripheral surface, 53A, 53B ... engaging portion, 61 ... first operating lever, 62 ... second operating lever, 65 ... link member , 69 ... seat slide device, 80 ... switching restriction mechanism, 81 ... rotation restricting part, 91 ... contacted part, 92 ... movable stopper, 93 ... shaft, 95 ... rotation transmission control means, 96 ... cam hole, 97 …pin.

Claims (7)

A seating area for tilting angle adjustment, and a forward tilting area on the front side of the seating area as a tilting area, and a seat back tilting in the tilting area with respect to a seat cushion with an operating shaft as a fulcrum;
A lock that can be switched between a locked state that restricts the tilting of the seat back relative to the seat cushion and an unlocked state that allows the tilting by turning the operating shaft in accordance with the operation of the first operating lever and the second operating lever. Mechanism,
At least in the seating area, the sliding movement of the seat cushion is restricted, the lock mechanism is switched to the unlocked state in accordance with the operation of the second operation lever, and the seat back is moved from the seating area to the forward tilting area. A vehicle seat device including a seat slide device that releases the restriction in conjunction with being moved forward,
A switching restriction mechanism is further provided that restricts switching of the locked state and the unlocked state by the lock mechanism only when the seat back is tilted in the seating area when the first operation lever is operated. A vehicle seat device. The lock mechanism is attached to one of the seat cushion and the seat back and has a first member having an internal gear around the operation shaft, and the first member is attached to the other and centered on the operation shaft. A second member that can rotate with respect to the second member, and a plurality of lock members that are attached to the second member and have external teeth that face the internal gear, respectively, and press the lock members radially outward. The seatback is brought into the locked state by meshing the external teeth with the internal gear, and the lock gears are moved radially inward by the rotation of the operation shaft to cause the internal gears of the external teeth to move. The vehicle seat device according to claim 1, wherein the seat back is brought into the unlocked state by releasing the engagement with the vehicle. Stores the angular position of the seat back in the locked state immediately before switching to the unlocked state, and returns to the locked state only when the seat back in the unlocked state tilts to the stored angular position. Further comprising a memory mechanism that allows
The vehicle seat device according to claim 2, wherein the second operation lever is operated when the memory mechanism is operated to rotate the operation shaft. The memory mechanism has a cylindrical storage recess provided in the first member and an annular shape divided at one place. The memory mechanism is stored in the storage recess in a reduced diameter state, and is connected to each other in the circumferential direction. A memory plate having a pair of engaged portions at different locations and a pair of lock members among the plurality of lock members, and is engaged with and disengaged from the engaged portions as the lock members move in the radial direction. An engagement portion,
In the unlocked state, the engaging portion is semi-engaged with the corresponding engaged portion in the radial direction, and in this state, the engaged portion is pressed in the circumferential direction by the engaging portion, The memory plate is rotated integrally with the lock member with respect to the storage recess, thereby allowing the seat back to tilt without memorizing the angular position, and the engaging portion being the engaged portion. And the memory plate is slid on the inner peripheral surface of the memory plate in a state in which the memory plate is non-rotatably locked with respect to the storage recess, so that the angular position is stored and the seat back is stored. The vehicle seat device according to claim 3, wherein the vehicle seat device is allowed to tilt. The switching restriction mechanism is provided in the first member so as to be integrally rotatable, and a rotation restricting portion having an inner peripheral surface having the same diameter as the inner peripheral surface of the memory plate on which the engaging portion slides. With
When the first operating lever is operated, the locking member with the memory plate is restricted from rotating by the contact of the engaging part in the half-engaged state with the rotation restricting part, and the seat back Tilt from the seating area to the forward fall area is prevented,
When the second operating lever is operated, the engaging portion passes over the engaged portion and the rotation restricting portion and is slid on the inner peripheral surface of the memory plate. The vehicle seat device according to claim 4, wherein tilting from a seating area to the forward tilting area is allowed. The switching restriction mechanism is
A contacted portion that is provided on the seat back and is displaced as the seat back tilts;
A movable stopper that is supported by a shaft so as to be tiltable and tilts between a contact position that restricts the tilt of the seat back by contact with the contacted portion and a non-contact position that is retracted from the contact position; ,
A link member coupled to the operation shaft so as to be integrally rotatable, and capable of transmitting the rotation of the operation shaft accompanying the operation of the first operation lever and the second operation lever to the movable stopper;
When the first operation lever and the second operation lever are operated to rotate the operation shaft by an angle for causing the unlocked state that allows tilting of the seat back without storing the angular position. The lock mechanism prevents the rotation of the link member from being transmitted to the movable stopper and restricts the tilt of the seat back forward by positioning the movable stopper at the contact position. The switching between the locked state and the unlocked state is limited only when the seat back tilts within the seating area, while the second operating lever is tilted without storing the angular position. When the operation shaft is rotated more than when the unlocked state is allowed, the link member is rotated. By transmitting to the movable stopper and retracting the movable stopper to the non-contact position to release the forward tilt restriction of the seat back, the seat back is moved forward from the seating area to the forward tilt area. The vehicle seat device according to claim 4, further comprising: a rotation transmission control unit that allows The vehicle seat device according to claim 6, wherein the rotation transmission control means includes a cam hole formed in one of the movable stopper and the link member, and a pin provided in the other and inserted into the cam hole. .

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