JP4795809B2 - Seat reclining device - Google Patents

Description

  The present invention relates to an improvement of a reclining device used for appropriately adjusting an inclination angle of a seat back constituting a seat such as a vehicle seat.

  Some conventional automobiles having at least one row of rear seats, such as a one-box car, need to get on and off the rear seats with the seat back of the front seats moved forward. In this case, the reclining device for adjusting the inclination angle of the seat back with respect to the seat cushion of the front seat is operated by operating a lever provided on the side portion or the rear portion of the front seat to release the seat back lock. I try to put the back ahead.

  In the reclining device having such a configuration, the adjustment plate is rotatably attached to the pivot of the attachment plate connected to the seat back side, and the locking claw meshing with the teeth formed on the adjustment plate is connected to the seat cushion. Provided on the mounting plate, the locking claw engages with the teeth of the adjustment plate to hold the seat back at a predetermined inclination angle, while the inclination angle of the seat back is released by releasing the engagement between the locking claw and the adjustment plate teeth. To adjust. In addition, when the adjustment plate is locked by the locking claw, the regulation claw provided on the seat back comes into contact with a part of the adjustment plate to hold the adjustment plate in a predetermined position, and the regulation claw provided on the seat back By operating the release lever, the seat back is moved forward by releasing the lock of the adjustment plate by the restricting claw (see, for example, Patent Document 1).

  In addition, an internal tooth member and an external tooth member that mesh with each other are provided, the number of teeth of the internal tooth is set slightly larger than the number of teeth of the external tooth, and the external tooth member is rotated eccentrically with respect to the internal tooth member. In the Taumel reclining device, the disk latch formed with the external tooth member is locked by the latch operated by the operation lever provided on the side of the seat, and the operation lever is operated to unlock the disk latch. There has also been proposed a system in which the seat back is moved forward (see, for example, Patent Document 2).

  Furthermore, in a long sheet, the arms are respectively attached in the vicinity of both ends of an interlocking shaft that connects the reclining devices provided on both sides of the sheet, and each arm is connected to an operation lever via a rod. A configuration capable of operating the reclining device from either side has also been proposed (see, for example, Patent Document 3).

Japanese Utility Model Publication No. 57-117232 Japanese Utility Model Publication No.59-141847 JP 2001-128769 A

  However, in the reclining device described in Patent Document 1 or 2, the seat back can be moved forward to the most forward position only by operating the restriction claw release lever or the operation lever once. The seat back cannot be locked in position.

  Further, in the reclining device described in Patent Document 3, although the inclination angle of the seat back can be appropriately adjusted by operating each operation lever, the seat back is configured to be tiltable forward and backward, If this reclining device is attached to the driver's seat and the operation lever is attached to the back of the seat back of the driver's seat, if the passenger in the rear seat accidentally operates the operation lever while driving the vehicle, the seat back will fall back and be extremely dangerous. is there.

  The present invention has been made in view of such problems of the prior art, and is configured so that the seat back can be tilted forward only by operating the operation lever, and when the hand is released from the operation lever. An object of the present invention is to provide a seat reclining device excellent in operability and safety capable of locking a seat back at an arbitrary position.

  In order to achieve the above object, the invention according to claim 1 of the present invention is a seat reclining device for appropriately adjusting the inclination angle of a seat back that is tiltably attached to a seat cushion, A lock member for holding the seat back at a predetermined inclination angle with respect to the seat cushion, a first operating means for operating the lock member, and preventing the seat back from being moved backward, while the seat back being moved forward And a second operating means for operating the ratchet mechanism and the locking member. By operating the locking member by the first operating means, the seat back is moved against the seat cushion. The lock from the lock position held at a predetermined inclination angle to the lock release position where the seat back can be tilted with respect to the seat cushion. While the material is driven, the lock member and the ratchet mechanism are operated by the second operation means, so that the lock member is driven from the lock position to the lock release position, and at the same time, the seat back is prevented from being moved backward. Further, the seat back can be locked at an arbitrary position while allowing the seat back to be moved forward.

  According to a second aspect of the present invention, the lock member is provided between a first mounting member fixed to the seat cushion and a second mounting member fixed to a seat back tiltable with respect to the seat cushion. A first locking tooth that engages with the locking tooth of the locking member is formed on one of the first and second mounting members, and the lock is locked at the locking position. While the locking teeth of the member and the first locking teeth mesh with each other, the locking between the locking teeth of the locking member and the first locking teeth is released at the unlock position. .

  Furthermore, the invention according to claim 3 is characterized in that the ratchet mechanism includes a second locking tooth formed on one of the first and second mounting members, and the first and second mounting members. And a locking member having a locking claw that engages with the second locking tooth. When the locking claw of the locking member meshes with the second locking tooth, The locking claw of the locking member and the second locking tooth are shaped so as to allow only one-direction rotation with respect to the other of one of the first and second mounting members, and the second operating means By simultaneously operating the lock member and the locking member, the locking member is driven from the locked position to the unlocked position, and at the same time, the locking claw of the locking member is moved to the second locking tooth. By engaging, the seat back is prevented from falling behind. Characterized by being adapted to permit forward tilting of the back.

  According to a fourth aspect of the present invention, the second locking teeth are formed on the outer peripheral surface of one of the first and second mounting members.

  According to a fifth aspect of the present invention, the second locking teeth are formed on a locked member separate from the first and second mounting members, and the locked member is the first locking member. And it joined to either one of the 2nd attachment members, It is characterized by the above-mentioned.

  According to a sixth aspect of the invention, the lock members of the left and right reclining devices are connected via a connecting shaft, and the connecting member is operated by rotating the connecting shaft by the second operating means. It is characterized by that.

  According to the present invention, by operating the lock member and the ratchet mechanism with the second operation means, the lock member is driven from the lock position to the lock release position, and at the same time, the seat back is prevented from being reversed. When the reclining device according to the present invention is provided in the driver's seat, the seat back can be moved backward even if the rear seat occupant mistakenly operates the second operating means. There is no safety.

  In addition, by operating the second operating means, the seat back can be quickly moved forward to the most forward position, and the seat back can be locked at an arbitrary position, so that the operability is excellent.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a vehicle seat S provided with a reclining device R according to the present invention. A seat cushion SC attached to a vehicle body floor via a pair of left and right seat slide devices SL, and a seat cushion SC And a seat back SB attached to the rear end portion so as to be tiltable. The reclining device R according to the present invention is attached to a connecting portion between the seat cushion SC and the seat back SB on both sides of the vehicle seat S, and is used to appropriately adjust the inclination angle of the seat back SB with respect to the seat cushion SC. .

  The overall configuration of a conventionally known reclining device R to which the present invention is applied will be described first with reference to FIGS.

  As shown in FIGS. 3 to 5, each reclining device R is fixed to the first bracket (first mounting member) 2 fixed to the seat cushion SC and to the seat back SB so as to face the first bracket 2. Second bracket (second mounting member) 3, a pair of lock plates 4 interposed between the first and second brackets 2, 3, and a drive for moving the pair of lock plates 4 in the direction of separating and contacting each other A cam 5 as a member, an operation lever (first operation means) 7 for rotating the cam 5 forward and backward about an axis, and a holding plate 8 for holding and holding the operation lever 7 are provided. Yes.

  The upper part of the first bracket 2 is formed in a circular shape, and a fitting hole 21 into which a fitting part 7a with a cam 5 projecting a part of the operation lever 7 is fitted is formed in the central part of the upper circular shape. A pair of guide members 22 in the front-rear direction is bulged toward the inner side in the width direction (left side in FIG. 5) on the left side (left side in FIG. 5, that is, the surface facing the second bracket 3). Has been. Each guide member 22 is formed in an arc shape with the insertion hole 21 as the center, and the shape is set symmetrically with respect to the insertion hole 21.

  The lock plate 4 and the cam 5 are accommodated between the pair of front and rear guide members 22, and guide protrusions 22 a are formed on the upper and lower ends of each guide member 22. A pair of upper and lower guide grooves for fitting a part of 4 (a meshing portion 41 described later) in a sliding contact state is formed.

  The second bracket 3 has a circular lower part and an attachment part on the upper part. On the left side surface of the second bracket 3, a circular bulging portion 31 centered on the lower circular portion is formed, and the central portion of the circular bulging portion 31 faces the insertion hole 21 of the first bracket 2. A through hole 31a is formed.

  The right side of the circular bulging portion 31 is a mounting recess 33, and the inner radius thereof is set to be slightly larger than the radius of curvature of the outer peripheral surfaces of the pair of guide members 22 described above. Each guide member 22 is fitted into the mounting recess 33 while the outer peripheral surface of the guide member 22 is in sliding contact with the inner peripheral surface of the mounting recess 33 in a state of being combined with the bracket 3. Further, internal teeth 34 are formed on the upper and lower sides of the inner peripheral surface (side wall) of the mounting recess 33 so as to face each other.

  The upper edge of the second bracket 3 is provided with attachment holes at the front and rear ends, respectively, and a first presser plate as a presser plate that holds the first bracket 2 so as not to be detached from the second bracket 3 through these attachment holes. The third bracket 35 is bolted, and the third bracket 35 is fixed to the seat back SB. Then, the third bracket 35 is fixed to the second bracket 3 in a state where the first bracket 2 is stacked on the second bracket 3, so that the third bracket 35 allows the rotation of the first bracket 2 and the upper portion thereof. This prevents the upper portion of the first bracket 2 from separating from the second bracket 3.

  Also, mounting holes are formed in the lower edge portion of the first bracket 2 at the front and rear end portions, and the first bracket 2 is fixed to the seat cushion SC by being bolted through these mounting holes. .

  Each lock plate 4 includes a meshing portion 41 that is fitted in the guide groove of the first bracket 2 so as to be movable up and down, and a first shoulder portion 42 and a second shoulder portion 43 that are integrally formed on both sides of the meshing portion 41. And a leg portion 44 extending from the second shoulder portion 43 toward the first shoulder portion 42 of the lock plate 4 located on the opposite side. A locking tooth 41 a that meshes with the internal teeth 34 of the second bracket 3 is formed at the leading edge of the meshing portion 41, and the locking teeth 41 a and the internal teeth 34 in a state where the guide member 22 is fitted in the mounting recess 33. The relative rotation between the first bracket 2 and the second bracket 3 is prevented by the meshing. On the other hand, the leg portion 44 has a linear outer edge portion that is in sliding contact with the linear inner edge portion of the guide member 22, and the linear inner edge portion is rotatably accommodated in a space surrounded by the pair of lock plates 4. The shape is set so as to be in sliding contact with the outer peripheral surface of the.

  The length dimension of the leg portion 44 is such that each lock plate 4 moves radially outward and the engagement tooth 41a meshes with the inner tooth 34 of the second bracket 3 and the radially inward position. It is set so that it can move between the engagement release position (lock release position) where the engagement teeth 41a and the internal teeth 34 of the second bracket 3 are released. More specifically, the distance between the meshing position and the meshing release position is set to be slightly larger than the tooth height dimension of the locking tooth 41a, and the lock plate 4 is moved radially outward from the insertion hole 21. While the locking teeth 41a of the meshing portion 41 mesh with the inner teeth 34, the locking plate 4 moves toward the insertion hole 21, whereby the meshing of the locking teeth 41a with the inner teeth 34 is released.

  The cam 5 is formed in a substantially hexagonal shape, and two of the three corners facing one lock plate 4 abut on the inner peripheral surface of the lock plate 4 at the meshing position, and at the mesh release position. The remaining one corner is in contact with a projection (not shown) formed on the leg 44. The same applies to the three corners facing the other lock plate 4.

  A long hole 5a is formed in the center of the cam 5. As shown in FIG. 4, one end of a connecting shaft 10 that connects the left and right reclining devices R is inserted into the long hole 5a. After the fitting portion 7a of the lever 7 is fitted into the fitting hole 21 of the first bracket 2, one end of the connecting shaft 10 is further inserted into the long hole 7b formed in the fitting portion 7a, whereby the cam 5 Is operated by the operating lever 7.

  The holding plate 8 that holds the operation lever 7 is attached to the first bracket 2 so as to stabilize the mounting state of the operation lever 7 on the first bracket 2. As shown in FIG. 5, the holding plate 8 includes a plate body 81 that presses the operation lever 7, an arc plate 82 that protrudes outward from the upper edge of the plate body 81, and a lower part of the plate body 81. And a spring locking piece 83 projecting from the rear end of the edge.

  Further, a spring locking piece 71 projects from the intermediate portion of the operation lever 7, and a coil spring 84 is stretched between the spring locking piece 71 of the operation lever 7 and the spring locking piece 83 of the holding plate 8. Accordingly, the operation lever 7 is urged in the direction of arrow A.

  Further, the third bracket 35 is also provided with a spring locking piece 35a protruding rightward in FIG. 5, and between the spring locking piece 35a and the front edge of the arc plate 82 of the holding plate 8. A spiral spring 9 is mounted on the The spiral spring 9 receives the urging force of the second bracket 3 in the direction of arrow B through the third bracket 35, and the seat back SB is urged through the second bracket 3 so that the seatback SB is always in the forward-facing posture. Has been.

The operation of the reclining device according to the present invention having the above configuration will be described below.
In a normal seating state in which the operation lever 7 is not operated, the operation lever 7 is urged in the direction of arrow A by the elastic force of the coil spring 84, so that the cam 5 connected to the operation lever 7 via the connecting shaft 10. Is also urged in the direction of arrow A.

  In this state, the two corners of the cam 5 are in contact with the inner peripheral surface of one lock plate 4, and the two corners located on the opposite side of the two corners are the inner sides of the other lock plate 4. The lock plate 4 is urged outward in the radial direction by abutting against the peripheral surfaces. Therefore, the locking teeth 41a of the lock plate 4 protrude outward from the guide grooves formed between the opposing guide protrusions 22a of the pair of guide members 22, and mesh with the internal teeth 34 of the opposing second bracket 3. Thus, the position of the second bracket 3 relative to the first bracket 2 or the inclination angle of the seat back SB relative to the seat cushion SC is maintained at a predetermined position or a predetermined angle.

  In this state, when the grip portion of the operation lever 7 is pulled up against the elastic force of the coil spring 84, the cam 5 rotates in the reverse direction of the arrow A and is positioned at one corner of the cam 5 and the opposite side. Since the corners are in contact with and pressed against the convex portions (not shown) of the leg portions 44 of the pair of lock plates 4, the meshing portions 41 of the lock plates 4 slide inward in the radial direction along the guide grooves. The engagement between the locking teeth 41a and the inner teeth 34 of the second bracket 3 is released, and the lock plate 4 moves from the engagement position to the engagement release position. Therefore, the tilt posture (tilt angle) of the seat back SB relative to the seat cushion SC can be arbitrarily set.

  After setting the tilting posture of the seat back SB relative to the seat cushion SC, when the hand is released from the grip portion of the operation lever 7, the cam 5 rotates in the direction of arrow A due to the elastic force of the coil spring 84, and the lock plate 4 moves in the radial direction. Sliding outwardly, the locking teeth 41a mesh with the inner teeth 34 of the second bracket 3 again, and the seat back SB is held in a newly set tilting posture.

  The configuration and operation of a conventionally known reclining device R to which the present invention is applied have been described above. The gist of the present invention will be described below.

  FIG. 6 shows a reclining device R according to the present invention, and a plurality of locking teeth 23 are formed on a part of the upper portion of the circular portion of the first bracket 2 provided in the reclining device R. The third bracket 35 to which the second bracket 3 is attached is provided with a locking member 12 having a locking tooth 23 and a detachable locking claw 12a, which is rotatably attached via a pin 14. On top of the locking member 12, a spring locking piece 12b and a wire locking piece 12c are integrally formed by bending a part of the locking member 12.

  Further, the other end of the coil spring 16 whose one end is locked to the spring locking piece 12 b is locked to a spring locking piece 35 b formed by cutting and raising a part of the third bracket 35. Due to this elastic force, the locking claw 12a of the locking member 12 is always urged in the direction of arrow C where the engagement with the locking teeth 23 of the first bracket 2 is released.

  The locking claws 12a of the locking member 12 and the locking teeth 23 of the first bracket 2 are shaped so as to constitute a so-called ratchet mechanism, and the locking teeth 41a of the lock plate 4 and the second bracket When the engagement of the engagement claw 12a of the engagement member 12 and the engagement tooth 23 of the first bracket 2 are engaged with each other in the state where the engagement with the internal teeth 34 of the third bracket 3 is released, the second bracket 3 indicated by an arrow D in FIG. While the rotation of the first bracket 2 is allowed, the rotation of the second bracket 3 in the direction opposite to the arrow D is prevented. In other words, the seat back SB is allowed to be moved forward, but the backward movement is prevented.

  As shown in FIGS. 1, 2, and 7, one end of an operation lever (second operation means) 20 is pivotally attached to the seat back frame via an attachment member 18. The other end protrudes rearward from the seat back SB, and an operation knob 25 is attached to the protruding portion. Since the operating lever 20 is swung up and down on the back side of the seat back SB, a slit 24 for swinging the operating lever 20 is formed in the up and down direction on the back of the seat back SB.

  One end of a wire 26 as a first connecting member is locked to an intermediate portion of the operation lever 20, and the other end of the wire 26 is locked to a cylindrical branch member 28. One end of three wires 30, 32, 34 as second connecting members are locked to the branching member 28, and two of the three wires 30, 32, 34 are not only two wires 30, 32. One end is locked to the wire locking piece 12c of the locking member 12 provided in the left and right reclining devices R, while the other end of the remaining one wire 34 is a connecting shaft that connects the left and right reclining devices R. 10 is engaged with the other end of the arm 36 whose one end is joined to the arm 10.

  Operations other than the above-described operation of the reclining device R according to the present invention having the above-described configuration will be described below with reference to FIGS.

  When the operation knob 25 is not operated, the locking teeth 41a of the lock plate 4 mesh with the inner teeth 34 of the second bracket 3, and the seat back SB is held at a predetermined inclination angle as shown by the solid line in FIG. is doing. At this time, as shown in FIG. 8A, the engagement between the locking claw 12 a of the locking member 12 and the locking teeth 23 of the first bracket 2 is released by the elastic force of the coil spring 16.

  When the operation knob 25 is operated in the direction indicated by the arrow in FIG. 9 (pushing up), the operation lever 20 swings upward and the wire 26 is pulled upward, and the wire 3 connected to the wire 26 3 The wires 30, 32, 34 of the book are pulled upward. As a result, the arm 36 fixed to the connecting shaft 10 swings in the direction of arrow E (see FIG. 6), and the cam 5 rotates together with the connecting shaft 10, so that the locking teeth 41a of the lock plate 4 and the second While the meshing with the internal teeth 34 of the bracket 3 is released, the locking members 12 of the left and right reclining devices R rotate in the opposite direction of the arrow C against the elastic force of the coil spring 16, and the locking claws 12 a meshes with the locking teeth 23 of the first bracket 2. Each of the wires 30, 32, and 34 includes an outer cable and an inner cable that is slidably provided in the outer cable. The outer cable is fixed, and the inner cable is fixed to the wire of the locking member 12. The above-described operation is performed by locking to the locking piece 12c or the arm 36 fixed to the connecting shaft 10.

  As described above, the latching claw 12a of the latching member 12 and the latching tooth 23 of the first bracket 2 constitute a ratchet mechanism and only allow the seat back SB to move forward. As shown, the seat back SB quickly moves forward, but the subsequent movement is prevented.

  Further, when the hand is released from the operation knob 25, the operation lever 20 swings downward and the wires 26, 30, 32, and 34 are pulled downward, and the locking teeth 41a of the lock plate 4 are moved inside the second bracket 3. Since it meshes with the teeth 34 again, the seat back SB can be held at an arbitrary inclination angle. At this time, the engagement between the locking claws 12a of the locking members 12 of the left and right reclining devices R and the locking teeth 23 of the first bracket 2 is released.

  In the above embodiment, the locking teeth 23 are formed on the outer peripheral surface of the first bracket 2, but as shown in FIG. 10, the locked member 23A having the locking teeth 23a is provided. It may be formed separately from the first bracket 2, and the locked member 23 </ b> A may be joined to a predetermined position of the first bracket 2. In this case, as the reclining device R excluding the locked member 23A, the conventionally known reclining device R described with reference to FIGS. 3 to 5 can be employed.

  In the above embodiment, a pair of lock plates 4 are interposed between the first and second brackets 2 and 3, and internal teeth 34 are formed on both sides of the second bracket 3 to form a pair of lock plates 4. However, the present invention is not necessarily limited to this configuration, and has a first mounting member fixed to the seat cushion SC and a second mounting member fixed to the seat back SB. At least one locking member having a locking tooth between the first and second mounting members is interposed, and the locking member is formed on one of the first and second mounting members. Further, the present invention can be applied to a reclining device having a configuration in which a driving member such as a cam is operated and meshed with each other.

  The reclining device according to the present invention can be applied to, for example, all the seats in the vehicle except the last row. On the other hand, since the seat back can be easily moved forward, the safety is high, and it is particularly effective when used in a driver's seat (driver's seat).

It is a perspective view of the vehicle seat provided with the reclining device concerning the present invention. It is another perspective view of the vehicle seat of FIG. It is a front view of the reclining device concerning the present invention. It is a disassembled perspective view of the reclining apparatus of a conventional structure. FIG. 4 is another exploded perspective view of the reclining device of FIG. 3. It is a disassembled perspective view of the reclining apparatus concerning this invention. FIG. 3 is a sectional view taken along line VII-VII in FIG. 2. It is a front view of the reclining device of FIG. 6, (a) has shown the state by which the meshing | engagement of the latching claw of a latching member and the latching tooth of a 1st bracket was cancelled | released, (b) is a latching member This shows a state in which the locking claw and the locking teeth of the first bracket are engaged with each other. It is a side view of the vehicle seat provided with the reclining device of FIG. 6, and has shown the state which operated the operation lever especially and made the seat back forward. It is a disassembled perspective view which shows the modification of the reclining apparatus of FIG.

Explanation of symbols

2 First bracket, 3 Second bracket, 4 Lock plate, 5 Cam,
5a long hole, 7 operation lever, 7a fitting part, 7b long hole,
8 holding plate, 9 spiral spring, 10 connecting shaft, 12 locking member,
12a locking claw, 16 coil spring, 18 mounting member, 20 operation lever,
21 insertion hole, 22 guide member, 22a guide projection, 23 locking teeth,
23A Locked member, 23a Locking tooth, 24 Slit, 25 Operation knob,
26, 30, 32, 34 wire, 28 branch member, 31 circular bulge,
31a through-hole, 33 mounting recess, 34 internal teeth, 35 third bracket,
36 arms, 41 meshing portions, 41a locking teeth, 42 first shoulder,
43 second shoulder, 44 leg, 84 coil spring, R reclining device,
S seat, SB seat back, SC seat cushion,
SL sheet slide device.

Claims (6)

A seat reclining device for appropriately adjusting the inclination angle of a seat back attached to a seat cushion so as to freely tilt,
A lock member for holding the seat back at a predetermined inclination angle with respect to the seat cushion, a first operating means for operating the lock member, and preventing the seat back from being moved backward, while the seat back being moved forward And a second operating means for operating the ratchet mechanism and the locking member. By operating the locking member by the first operating means, the seat back is moved against the seat cushion. The lock member and the ratchet mechanism are driven by the second operating means while the lock member is driven from a lock position held at a predetermined inclination angle to a lock release position where the seat back is allowed to tilt with respect to the seat cushion. By operating, the locking member is driven from the locked position to the unlocked position, and at the same time, the seat back Sheet reclining device to prevent losses, further to permit forward tilting of the seat back, characterized in that to be able to lock the seat back in any position after. The lock member is attached between the first attachment member fixed to the seat cushion and the second attachment member fixed to the seat back tiltable with respect to the seat cushion and has a locking tooth, A first locking tooth that meshes with the locking tooth of the locking member is formed on one of the first and second mounting members, and the locking tooth of the locking member and the first engagement at the locking position. 2. The seat reclining device according to claim 1, wherein the engagement between the locking teeth of the lock member and the first locking teeth is released at the unlocking position while the locking teeth are engaged. The ratchet mechanism is attached to the other one of the first and second attachment members, and the second engagement tooth is formed on one of the first and second attachment members. A locking member having a locking claw that meshes with the teeth, and when the locking claw of the locking member meshes with the second locking tooth, the other one of the first and second mounting members The locking claw of the locking member and the second locking tooth are set so as to allow only one-direction rotation with respect to the rotation member, and the locking member and the locking member are simultaneously set by the second operating means. By operating, the locking member is driven from the locked position to the unlocked position, and at the same time, the locking claw of the locking member is engaged with the second locking teeth, so that the seat back is moved backward. While preventing the seat back from being advanced Sheet reclining device according to claim 2, characterized in that. The seat reclining device according to claim 3, wherein the second locking teeth are formed on an outer peripheral surface of one of the first and second mounting members. The second locking teeth are formed on a locked member separate from the first and second mounting members, and the locked member is attached to one of the first and second mounting members. 5. The seat reclining device according to claim 3, wherein the seat reclining device is joined. The lock members of the left and right reclining devices are connected via a connecting shaft, and the lock member is operated by rotating the connecting shaft by the second operating means. The seat reclining device according to claim 1.

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