JP2015227071A - Recliner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance latch strength in the axial direction by an outer peripheral ring.SOLUTION: An outer peripheral ring 90 is mounted over the outer peripheral parts of a ratchet 10 and a guide 20 both disposed in a recliner 4, and functioning to latch them in the axial direction; a press part 91 to be abutted against the outer peripheral part of the ratchet 10 from outside in the axial direction is endlessly formed around the outer peripheral ring 90; caulking pieces 92A to be abutted against the outer peripheral part of the guide 20 from outside in the axial direction is formed around a partial area of the outer peripheral ring 90 in the circumferential direction, accordingly the outer peripheral ring 90 has abutting portions extending longer inside in the radial direction than the press part 91.

Description

  The present invention relates to a recliner. More specifically, the present invention relates to a recliner for connecting a seat back to a state where a backrest angle can be adjusted with respect to a base on a floor.

  2. Description of the Related Art Conventionally, in a vehicle seat, a configuration is known in which a seat back is connected to a seat cushion so that a backrest angle can be adjusted via a recliner (Patent Document 1). The recliner includes a ratchet and a guide that are assembled so as to be rotatable relative to each other, and a lock mechanism that locks the relative rotation. The recliner is configured such that the ratchet and the guide are assembled in a state in which the ratchet and the guide are prevented from coming off in the axial direction by the cylindrical ring member mounted between the outer peripheral portions of the ratchet and the guide. . The ring member described above is formed in a substantially cylindrical shape, and one end portion in the axial direction is applied to the outer peripheral portion of the ratchet from the outside in the axial direction, and the other end portion in the axial direction is axially applied to the outer peripheral portion of the guide. It is combined by being crimped so as to be sandwiched from both sides.

JP 2011-219047 A

  However, in the above-described prior art, the coupling portion of the ring member is a projection in which a caulking piece that is caulked by being applied to the outer peripheral portion of the guide from the outside in the axial direction protrudes on the outer surface in the axial direction of the guide. In order to avoid interference with objects (protrusions that have been half-punched outward to support the lock mechanism on the inner surface), the bending back length inward in the radial direction is shortened. For this reason, the above-described ring member does not sufficiently exert the anti-separation strength for preventing the ratchet and guide from coming off in the axial direction. The present invention was devised to solve the above-described problems, and the problem to be solved by the present invention is to improve the axial stopper strength of the ring member.

  In order to solve the above problems, the recliner of the present invention takes the following means.

  1st invention is a recliner which connects a seat back to the state which can adjust a backrest angle with respect to the base on a floor. The recliner includes two disk-like connecting members assembled in an axial direction so as to be relatively rotatable with each other, a rotation stopping mechanism provided between the two connecting members and stopping the relative rotation, A ring member that is mounted across the outer peripheral portions of the connecting members of the sheet and holds them in an assembled state in the axial direction. In the ring member, a first pressing portion applied from the outer side in the axial direction to the outer peripheral portion of the one side connecting member is formed endlessly over the entire circumference, and the shaft is formed on the outer peripheral portion of the other side connecting member. The second pressing portion applied from the outer side in the direction is formed in a partial region in the circumferential direction and has a shape having a fitting margin extending longer in the radial direction than the first pressing portion.

  According to the first aspect of the present invention, the ring member has a high structural strength in which the second pressing portion, which is formed in a partial region in the circumferential direction and has a low structural strength, is formed over the entire circumference. By making it the shape which has the fitting margin extended in the inner side of radial direction rather than 1 holding | suppressing part, the strength of the axial direction of both connection members by a ring member can be made high.

  The second invention is the following configuration in the first invention described above. In other words, the second pressing portion is formed in a circumferential region that avoids interference with the protrusion protruding on the outer surface in the axial direction of the other connecting member.

  According to the second aspect of the invention, the second pressing portion of the ring member can be provided in a state in which the overhang in the axial direction from the other connecting member is suppressed.

  The third invention is the following configuration in the second invention described above. That is, the second pressing portion is provided in a state of being applied from the outside in the axial direction by the coupling member that is applied to and coupled to the outside surface in the axial direction of the protrusion.

  According to the third aspect of the invention, since the second pressing portion is less likely to be peeled and deformed in the axial direction by the support by the coupling member, it is possible to further increase the axial detachment prevention strength of the two connecting members by the ring member. it can.

It is a perspective view showing the schematic structure of the vehicle seat to which the recliner of Example 1 was applied. It is the disassembled perspective view which looked at the assembly part of a recliner from the one side. It is the disassembled perspective view which looked at the assembly part of a recliner from the other side. It is a disassembled perspective view of a recliner. It is the front view which looked at the recliner from the ratchet side. It is the front view which looked at the recliner from the guide side. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. 7 showing the locked state of the recliner. It is sectional drawing showing the unlocked state of the recliner. It is sectional drawing showing the free zone area | region of the recliner. It is the XI section enlarged view of FIG.

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

  First, the configuration of the recliner 4 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the recliner 4 of this embodiment is applied to a seat 1 that constitutes a left seat of an automobile, and a seat back 2 that serves as a backrest for a seated occupant is used as a seat cushion 3 that serves as a seating portion. On the other hand, it functions as a rotation shaft device (joint device) that can be rotated and connected in a state in which the backrest angle can be adjusted. Here, the seat cushion 3 corresponds to the “base” of the present invention. The recliner 4 described above includes lower ends of the left and right side frames 2Fa of the back frame 2F constituting the skeleton of the seat back 2, and rear end portions of the side frames 3Fa of the left and right sides of the cushion frame 3F constituting the skeleton of the seat cushion 3. Between the two, and are connected to each other (see FIGS. 2 to 3). Specifically, each side frame 2Fa of the seat back 2 described above is provided so as to be located inside each side frame 3Fa of the seat cushion 3, and a recliner 4 is provided between each of them. It is in a state.

  As shown in FIG. 1, each recliner 4 described above is normally held in a locked state in which the backrest angle of the seat back 2 is fixed. Each recliner 4 is unlocked in such a way that the reclining lever 5 provided on the side of the seat cushion 3 on the vehicle outer side is lifted to release the locked state at the same time and the backrest angle of the seat back 2 can be changed. It can be switched to the state. Each recliner 4 is returned to the locked state in which the backrest angle of the seat back 2 is fixed again by the urging by returning the operation of lifting the reclining lever 5.

  Between the side frames 2Fa on both the left and right sides of the seat back 2 and the side frames 3Fa on the left and right sides of the seat cushion 3, an urging force is always applied to the seat back 2 in the direction of forward tilt rotation. A return spring 6 is hooked. These return springs 6 are respectively constituted by spiral springs, and their inner ends are hooked to brackets 3Fc coupled to the outer surfaces of the side frames 3Fa of the seat cushion 3, and the outer sides thereof are arranged. The end portion is in a state of being hooked and provided on a bracket 2Fc coupled to the outer surface of each side frame 2Fa of the seat back 2 (see FIG. 7).

  The seat back 2 is lifted to a position where it hits the back of the seated occupant by releasing the above-described fixed state of the backrest angle by the recliners 4 by the rotational urging force of the return spring 6, and the seated occupant The backrest angle is freely adjusted in the front-rear direction according to the movement of tilting the back and forth. By providing such an urging structure, the backrest angle of the seat back 2 can be easily adjusted.

  The seat back 2 described above rotates in a rotation region of about 180 degrees from the forward tilt position where the seat back 2 is folded into the upper surface portion of the seat cushion 3 to the rear tilt position where the seat cushion 2 is folded backward. Be able to. Among these, the rotation angle of about 90 degrees from the position where the backrest angle of the seat back 2 stands straight upward to the above-described rearward tilt position is reduced by stopping the lifting operation of the reclining lever 5. It is set as a rotation area of a “lock zone” that is returned to a fixed state. Further, the rotation angle of about 90 degrees from the position where the backrest angle of the seat back 2 exceeds the lock zone to the forward tilt position described above is changed even if the lifting operation of the reclining lever 5 is stopped. It is set as a "free zone" rotation area that is maintained in a state where it can be maintained.

  Each rotation area of the lock zone and free zone described above is formed by the rotation area of the lock zone and free zone set in each recliner 4 described later. Since the above-described free zone rotation area is provided, the seat back 2 is pushed down to the position where the seat 1 enters the free zone by operating the reclining lever 5 while no person is sitting on the seat 1. After that, even if the operation of the reclining lever 5 is not continued, it is automatically moved forward to the position where it is folded into the upper surface of the seat cushion 3.

  As shown in FIGS. 2 to 3, each recliner 4 described above includes a ratchet 10 integrally coupled to the outer side surface of each side frame 2 Fa of the seat back 2 described above, and each side frame 3 Fa of the seat cushion 3. A guide 20 integrally coupled to the inner side surface, and the relative rotation between the ratchet 10 and the guide 20 is locked or released to fix or release the backrest angle of the seat back 2. It has a configuration to do. Here, the ratchet 10 corresponds to the “one side connecting member” of the present invention, and the guide 20 corresponds to the “other side connecting member” of the present invention.

  Hereinafter, a specific configuration of each recliner 4 described above will be described in detail. The recliners 4 are arranged symmetrically with each other, but have substantially the same configuration. Therefore, in the following, the configuration of the recliner 4 arranged outside the vehicle shown in FIGS. As shown in FIG. 4, the recliner 4 includes a disc-shaped ratchet 10 and a guide 20 that are assembled together in the axial direction, four poles 30 (30A to 30D) assembled between them, a rotating cam 40, and a hinge cam. 50, the free zone plate 70, the release plate 80, the lock spring 60 assembled to the outer surface of the guide 20, and the cylindrical shape with a seat assembled between the outer periphery of the ratchet 10 and the outer periphery of the guide 20. The outer peripheral ring 90 is formed. Here, the outer peripheral ring 90 corresponds to the “ring member” of the present invention. The ratchet 10, the guide 20, the four poles 30, the rotation cam 40, and the hinge cam 50 described above are each formed of a hardened steel plate material that has been quenched.

  As shown in FIG. 4, the ratchet 10 is formed in a substantially disc shape, and a cylinder that protrudes in a cylindrical shape in an axial direction that is an assembling direction to the guide 20 at the outer peripheral edge portion of the disc body 11. The portion 12 is formed. The cylindrical portion 12 is formed in a shape extruded in a cylindrical shape in the same direction when the outer peripheral edge of the disc body 11 is half-punched in the thickness direction. On the inner peripheral surface of the cylindrical portion 12, an inner tooth row 12 </ b> A that can press and engage each outer tooth row 31 formed on the outer peripheral surface of each pole 30 described later from the inside in the radial direction is formed. Yes. The internal tooth row 12A is formed over the entire circumference of the inner peripheral surface region of the cylindrical portion 12, and has a configuration in which a plurality of internal teeth are arranged at a pitch of 2 degrees in the circumferential direction.

  Further, on the inner side surface of the disc main body 11 of the ratchet 10 described above, four fitting protrusions 11C that protrude in a pin shape in the axial direction are formed. These fitting projections 11C fit four corresponding fitting holes 72 formed in the free zone plate 70 described later in the axial direction, respectively, so that the free zone plate 70 is rotated on the inner surface of the ratchet 10 in the rotational direction. It functions as a coupling part for mounting so as to be in an integrated state.

  Further, a through hole 11 </ b> A penetrating in a round hole shape is formed at the center of the disc body 11 of the ratchet 10 described above. In the through hole 11A, an operation pin 5A that is inserted into and mounted on a hinge cam 50 described later is inserted from the outside in the axial direction. Moreover, as shown in FIGS. 4-5, on the outer surface of the disc main body 11 of the ratchet 10 described above, six dowels 11B protruding in a substantially cylindrical shape are formed side by side in the circumferential direction at equal intervals. It is said that it was in the state. These dowels 11B are formed by half-cutting a part of the disc body 11 of the ratchet 10 in the thickness direction. 2 and 7, these dowels 11B are formed on the side frame 2Fa when the outer side surface of the disc body 11 of the ratchet 10 is applied to the outer side surface of the side frame 2Fa of the seat back 2 and joined. Each of the six corresponding dowel holes 2Fa1 is fitted into each of the two dowel holes 2Fa1 so as to function as a connecting portion integrally connected by welding. The side frame 2Fa of the seat back 2 is further formed with a round hole-shaped through hole 2Fa2 for allowing the aforementioned operation pin 5A to pass through in the axial direction.

  As shown in FIG. 4, the guide 20 is formed in a substantially disc shape having an outer diameter slightly larger than the ratchet 10 described above, and is provided at four locations on the inner side surface of the disc body 21 in the circumferential direction. In this position, a guide wall 23 that protrudes in a fan shape in the axial direction that is an assembly direction to the ratchet 10 is formed. Each of the guide walls 23 is formed in such a manner that the outer peripheral surfaces thereof are curved so as to draw the same circumference, and are sized so as to be gently fitted into the cylindrical portion 12 of the ratchet 10 described above. ing. The guide 20 is fitted into the cylindrical portion 12 of the ratchet 10 by fitting the above-described guide walls 23 into the cylindrical portion 12, so that the guide 20 is fitted into the cylindrical portion 12 of the ratchet 10 inwardly and outwardly. It is assembled in a state where it is rotatably supported inside and outside (see FIG. 7). And the said guide 20 is a form which slides a mutual disk shape with respect to the ratchet 10 with the outer periphery ring 90 mentioned later assembled ranging between the outer peripheral part and the outer peripheral part (cylindrical part 12) of the ratchet 10. It is set as the state assembled | attached to the state stopped by the axial direction so that it can rotate relatively (refer FIGS. 2-3, and FIG. 7). In the guide 20, the cylindrical portion 12 of the ratchet 10 described above is applied in the axial direction on the inner surface (sliding surface 21 </ b> C) on the outer peripheral side from the formation region of each guide wall 23 in the disc body 21. It can be assembled into a state (see FIG. 7).

  A through hole 21A penetrating in a circular hole shape is formed at the center of the disc main body 21 of the guide 20 described above. Inside the through hole 21A, a shaft portion 52 of a hinge cam 50, which will be described later, is inserted from the inside in the axial direction to the outside and is pivotally attached so as to be rotatable. Further, as shown in FIG. 4, four dowels 21 </ b> B protruding in a substantially cylindrical shape are formed on the outer surface of the disc main body 21 of the guide 20 described above so as to be arranged at equal intervals in the circumferential direction. It is said that. Specifically, each dowel 21 </ b> B is formed on a circumferential area where four cam housing grooves 24 </ b> B described later are formed on the outer surface of the disc body 21 of the guide 20. Each of the dowels 21B described above is formed by half-cutting a part of the disc body 21 of the guide 20 in the thickness direction. 3 and 7, these dowels 21B are formed on the side frame 3Fa when the outer side surface of the disc body 21 of the guide 20 is applied to the outer side surface of the side frame 3Fa of the seat cushion 3 and joined. Each of the corresponding dowel holes 3Fa1 is fitted into each of the four dowel holes 3Fa1 so as to function as a coupling portion integrally coupled by welding. The side frame 3Fa of the seat cushion 3 is further provided with a through hole 3Fa2 through which the operation pin 5A and the lock spring 60 (described later) mounted on the outer surface of the disc body 21 of the guide 20 can be passed in the axial direction. Is also formed.

  Further, as shown in FIG. 4, the guide 20 described above has a fan-shaped shape in the axial direction which is an assembly direction to the ratchet 10 at four positions in the circumferential direction of the inner surface of the disc body 21. A protruding guide wall 23 is formed. These guide walls 23 are formed by being partially punched in the thickness direction in a part of the disk main body 21 of the guide 20 so as to be extruded into a fan shape that expands in the same direction toward the outside in the radial direction. It is said that it was in the state. Due to the formation of each guide wall 23 described above, a concave pole housing groove 24A capable of housing each of the four poles 30 to be described later is formed in the circumferentially arranged region of each guide wall 23. It is in a state. Each guide wall 23 described above is configured to support each pole 30 set in each pole receiving groove 24A described above from both sides in the circumferential direction so as to be moved only inward and outward in the radial direction. ing. In addition, due to the formation of the guide walls 23 described above, a concave cam housing that can accommodate a rotating cam 40 (described later) in a state where the rotating cam 40 can be axially rotated in the central region of the guide 20 surrounded by the guide walls 23. A groove 24B is formed.

  The four pole housing grooves 24A formed in the circumferentially arranged region of each guide wall 23 and the cam housing groove 24B formed in the center portion of the guide 20 are respectively pushed out of the guide walls 23 described above. As a part of the guide groove 24 formed in a relatively recessed shape by molding, the guide groove 24 is formed in a shape that is recessed flush with each other. As described above, the guide 20 described above is in a state in which the four pawls 30, the rotating cam 40, and the hinge cam 50 that are assembled with the ratchet 10 are respectively supported. The guide groove 24 is formed in a concave shape having an inner surface at a position on the outer side in the axial direction with respect to each sliding surface 21 </ b> C formed on the inner surface on the outer peripheral side from the formation region of each guide wall 23 described above. . Further, as shown in FIG. 4, a spring hook portion 25 for hooking an outer end portion of a lock spring 60 described later protrudes in a pin shape on the outer surface of the disc body 21 of the guide 20 described above. It is formed into a shape.

  In the outer peripheral portion of the guide 20 described above, concave portions 26 that are recessed inward in the radial direction are formed at four positions in the circumferential direction. These recesses 26 are respectively formed in the circumferentially arranged regions of the respective pole receiving grooves 24A formed at the four positions in the circumferential direction of the guide 20 described above. Specifically, each recess 26 is formed in a shape having a circumferential dimension shorter than the circumferential dimension of each inter-arrangement region in each inter-arrangement region in the circumferential direction of each pole receiving groove 24A.

  Each of the recesses 26 described above passes through each of the caulking pieces 92A formed in the coupling portion 92 of the outer peripheral ring 90 described later and protruding in the axial direction from four positions in the circumferential direction from the inner side to the outer side in the axial direction. It functions as a threading part to be allowed (see FIGS. 4 and 7). Moreover, in the outer peripheral part of the guide 20 mentioned above, each convex part 27 formed in the shape which protruded on the radial direction between the arrangement | positioning area | regions of the circumferential direction of each recessed part 26 mentioned above is the outer periphery ring 90 mentioned above. Each of the abutting portions 92B formed in the region between the circumferential positions of the caulking pieces 92A functions as a locking portion that abuts against each other from the inside in the axial direction.

  As shown in FIGS. 4 and 8, the four poles 30 are housed and assembled in respective pole housing grooves 24 </ b> A formed on the inner surface of the disc body 21 of the guide 20. With the above assembly, each pole 30 is supported in the circumferential direction so that it can move only inward and outward in the radial direction along the shape of each pole receiving groove 24A with respect to the guide 20. Yes. As shown in FIG. 7, each pole 30 is accommodated in each of the above-described pole accommodation grooves 24A, and the inner periphery of the cylindrical portion 12 of the ratchet 10 is located at the position of the movement destination in the radial direction. The internal tooth row 12A formed on the surface is exposed.

  As shown in FIG. 4, external tooth rows 31 that can mesh with the internal tooth row 12 </ b> A of the ratchet 10 described above are formed on the outer peripheral surface of each pole 30 described above. Each external tooth row 31 is formed in a shape in which a plurality of external teeth are arranged at a pitch of 2 degrees in the circumferential direction on the outer peripheral surface of each pole 30 curved in the shape of an arc. As shown in FIGS. 8 to 9, each of the poles 30 described above is pushed outward in the radial direction by the rotating cam 40 when the rotating cam 40 set at the center of the guide 20 is rotated. (Refer to FIG. 8) or to be pulled back (refer to FIG. 9).

  As shown in FIG. 8, each pole 30 is pushed outward in the radial direction by the rotation of the rotary cam 40, so that the external tooth row 31 formed on the outer peripheral surface of each pole 30 becomes the internal tooth row 12 </ b> A of the ratchet 10. Pressed and meshed. Thereby, each pole 30 will be in the state integrally connected with the ratchet 10 in the rotation direction, and the relative rotation between the ratchet 10 and the guide 20 will be locked via each pole 30. That is, in the relationship with the guide 20, each pole 30 can move only inward and outward in the radial direction by the circumferential support by each guide wall 23 described above. This is because it functions so as to lock the rotation of the ratchet 10 relative to the guide 20 by being integrated with each other.

  Further, as shown in FIG. 9, each pole 30 is pulled back inward in the radial direction by the rotation of the rotary cam 40, so that each pole 30 is released from the meshing state with the internal tooth row 12 </ b> A of the ratchet 10. As a result, the state where the relative rotation between the ratchet 10 and the guide 20 is locked is released, and the ratchet 10 and the guide 20 are switched to a state where they can rotate relative to each other. Each of the poles 30 described above is formed in a U-shape having two legs 32 extending inward in the radial direction, and is formed on a surface on the side facing the inner surface of the ratchet 10. The hook projection 33 is formed in a pin shape in the axial direction. Each of the hooking projections 33 described above is assembled in a state of being passed through each of the drawing holes 83 formed in a thin disc-shaped release plate 80 that is overlapped and assembled with the rotating cam 40 described later.

  As shown in FIG. 8, the above-described poles 30 are pushed outward in the radial direction by the leg 32 being pressed by the rotary cam 40 from the inside in the radial direction by the rotation of the rotary cam 40. It has become. Further, as shown in FIG. 9, each pawl 30 is rotated in the direction opposite to that described above, so that the hooking projections 33 of the respective release holes 80 of the release plate 80 assembled to the rotary cam 40 are rotated. Each of the inclined outer peripheral surface shape guides is drawn inward in the radial direction and pulled back inward in the radial direction.

  As described above with reference to FIG. 8, the rotating cam 40 is housed and assembled in the cam housing groove 24 </ b> B formed on the inner surface of the disc body 21 of the guide 20. The above-described rotating cam 40 is supported in a rotatable manner with respect to the guide 20 by a hinge cam 50 (described later) that is inserted into the central portion and assembled. As shown in FIG. 7, the rotating cam 40 is formed in a shape having the same thickness as each of the poles 30 described above, and is accommodated in the cam accommodating groove 24 </ b> B (see FIG. 4). Are arranged in the same position as each pole 30 in the axial direction.

  As shown in FIGS. 8 to 9, the rotating cam 40 described above can allow the leg portions 32 of the poles 30 to enter the left and right sides and the upper and lower sides facing the poles 30. The recesses 42, the shoulders 43 on which the leg portions 32 of the respective poles 30 that have entered the recesses 42 are ridden so as to be pushed outward in the radial direction by the rotation of the rotary cams 40, and the rotation of the rotary cams 40. A support portion 44 applied to the central portion of the inner peripheral surface of each pole 30 is formed.

  The rotating cam 40 is set in a state that an operating portion 53 of a hinge cam 50 described later is assembled in an axial direction so as to be integrated in a rotating direction in a through hole 41 formed in the center portion thereof. Yes. Specifically, the through hole 41 is formed in a hole shape, and the operation part 53 formed in a hook shape of the hinge cam 50 is assembled, so that the through hole 41 is integrated with the operation part 53 in the rotation direction. Can be assembled to. As a result of the assembly, the rotary cam 40 is rotated integrally with the hinge cam 50 by a movement in which the hinge cam 50 is axially rotated to one side or the other side in the rotational direction.

  As shown in FIG. 8, the rotating cam 40 is normally pushed in the same direction because the above-described hinge cam 50 is urged to rotate clockwise by a lock spring 60 described later. It is set as the state hold | maintained in the state which was carried out. As a result, the rotating cam 40 pushes the legs 32 of the poles 30 outwardly in the radial direction by the shoulders 43 formed on the left and right sides and the upper and lower sides of the rotating cam 40, respectively. The recliner 4 is held in a locked state by meshing with the inner tooth row 12A. In the locked state, the rotating cam 40 is in a state where the support portions 44 formed on the left and right sides and the upper and lower sides are respectively assigned to the central portions of the inner peripheral surfaces of the poles 30. Is in a state of being strongly supported from the inside in the radial direction so that it is difficult to come off from the state where the gear is engaged with the inner tooth row 12A of the ratchet 10.

  As shown in FIG. 9, the rotating cam 40 is configured so that the hinge cam 50 is rotated in the direction opposite to the urging direction by pulling up the reclining lever 5 (see FIG. 1). The operation unit 53 is rotated in the counterclockwise direction in the drawing. As a result, in the rotating cam 40, each recess 42 formed on each of the left and right and upper and lower surfaces moves to a position immediately below the leg 32 of each pole 30 (inner position in the radial direction). At the same time, the hooking projections 33 of the respective poles 30 are drawn inwardly in the radial direction by the guides of the respective drawing holes 83 of the release plate 80 integrally assembled with the rotary cam 40, and the respective poles 30 are engaged with the ratchet 10. Remove from the state. Thereby, the locked state of the recliner 4 is released. In addition, when the operation of the reclining lever 5 is returned, the rotating cam 40 is rotated in the clockwise direction in the drawing by the operating portion 53 of the hinge cam 50 that is rotated by receiving the urging force from the lock spring 60 again. 30 is returned to the state in which 30 is engaged with the internal tooth row 12A of the ratchet 10 (the state where the recliner 4 is rotationally locked) (see FIG. 8).

  Here, as shown in FIG. 4, the release plate 80 described above is formed in a thin disk shape, and each of the round hole-like fittings formed at three positions on the disk surface is formed. By fitting the hole 82 with the three fitting protrusions 45 formed on the side surface of the rotating cam 40 as described above, the rotating cam 40 and the rotating cam 40 are overlapped in the axial direction so as to be integrated in the rotational direction. It is said that it was in the state. In the release plate 80 described above, triangular drawing holes 83 that are tapered in the counterclockwise direction shown in the figure are formed at four positions in the circumferential direction. As described above with reference to FIG. 9, the hooking projections 33 that protrude in the shape of pins formed on the poles 30 are set in the drawing holes 83 so as to enter the axial direction.

  In the release plate 80 configured as described above, when the rotating cam 40 pushes and moves each pole 30 outward in the radial direction by the integral rotation with the rotating cam 40, the hooking projection 33 of each pole 30 is pushed out outward in the radial direction. This movement is released by the shape of each pull-in hole 83. However, when the rotary cam 40 rotates in the direction opposite to the above, the release plate 80 pulls the hooking protrusion 33 of each pole 30 inward in the radial direction by the guide of the tapered shape of each drawing hole 83. The pole 30 is removed from the meshing state with the ratchet 10. A through hole 81 penetrating in the shape of a round hole is formed at the center of the release plate 80, and an operation pin 5A to be inserted and attached to a hinge cam 50 to be described later is passed in the axial direction. Yes.

  By the way, as shown in FIG. 10, the rotating cam 40 that pushes each of the poles 30 outward in the radial direction has a relative rotational position between the ratchet 10 and the guide 20 as shown in FIG. When the lifting portion 74 of the free zone plate 70 integrally attached to the ratchet 10 is located in the region to which the lifting protrusion 34 formed on 30A is moved, each pole 30 is moved in the radial direction. Even if the pole 30A is pushed outward, the raising protrusion 34 of the pole 30A rides on the raising portion 74 and the movement is stopped halfway, so that the meshing movement of all the poles 30 is in the middle position before the meshing. It is supposed to be stopped. As described above, the region in which the recliner 4 cannot be locked due to the one pole 30A (the lifting protrusion 34) riding on the riding portion 74 is the free zone region (reclining) described above with reference to FIG. Even if the lifting operation of the lever 5 is stopped, the backrest angle of the seat back 2 is not returned to the fixed state). Further, the region in which the recliner 4 can be locked without the riding protrusion 34 of the pole 30A climbing on the riding portion 74 is the region of the lock zone described above with reference to FIG. 1 (the lifting operation of the reclining lever 5 is stopped). Thus, the backrest angle of the seat back 2 is returned to a fixed state).

  As shown in FIG. 4, the above-mentioned free zone plate 70 is formed in a thin disk shape, and each of the round hole-like fitting holes 72 penetratingly formed at four positions on the disk surface. Is engaged with the four fitting protrusions 11C formed on the inner side surface of the disc main body 11 of the ratchet 10 as described above, so that the ratchet 10 and the ratchet 10 are overlapped in the axial direction so as to be integrated in the rotational direction. It is supposed to be attached. In the free zone plate 70 described above, an open ring-shaped escape hole 73 penetrating in the circumferential direction is formed in a central region near the outer peripheral side. In the escape hole 73, as shown in FIG. 8, a lifting protrusion 34 protruding in a pin shape protruding only on the pole 30A on the upper side in the drawing is set in a state of entering the axial direction. In the escape hole 73, a climbing portion 74 is formed in one area in the circumferential direction so that the outer peripheral surface projects into a smooth circular arc surface toward the inside in the radial direction. .

  As shown in FIG. 8, the free zone plate 70 having the above-described configuration causes the riding-up portion 74 to move to the upper side of the pole 30 </ b> A shown in the figure by an integral rotation with the ratchet 10 (change in the backrest angle of the seat back 2). When the poles 30 are located outside the circumferential region, even if the respective poles 30 are pushed outward in the radial direction, the lifting projections 34 of the upper pole 30A shown in the figure are pushed outward in the radial direction due to the shape of the escape holes 73. To escape the movement. However, as shown in FIG. 10, the free zone plate 70 is lifted by the rider 74 on the upper pole 30 </ b> A shown in the drawing by the integral rotation with the ratchet 10 (change in the backrest angle of the seat back 2). By entering the state where the protrusions 34 are moved, when the respective poles 30 are pushed outward in the radial direction, the upper protrusions 34 of the upper poles 30 </ b> A illustrated in FIG. In this state, the meshing movement of all the poles 30 is stopped at an intermediate position before meshing with the ratchet 10. A through hole 71 penetrating in a round hole shape is formed at the center of the free zone plate 70, and an operation pin 5A that is inserted into and mounted on a hinge cam 50 described later is passed in the axial direction. ing.

  As shown in FIG. 4, the hinge cam 50 includes a rectangular tube-shaped spring hook portion 51, a cylindrical shaft portion 52, and an operation portion 53 having a rectangular shape protruding radially outward in the axial direction. It is comprised as a shaft component formed by. At the center of the hinge cam 50, a through hole 50A penetrating in the shape of a square hole in the axial direction is formed. The hinge cam 50 has a spring hook portion 51 and a shaft portion 52 that are passed through a through hole 21A formed in the center portion of the guide 20 from the inside in the axial direction, so that the operation portion 53 is a disc body of the guide 20. The spring 20 is projected to the outside of the guide 20 at a position where it hits the inner surface of the guide 21, and the shaft 52 is fitted into the through hole 21A of the guide 20 so as to be pivotable. It is attached to.

  The hinge cam 50 is integrated in the rotational direction by fitting the inner end portion of the lock spring 60 wound in a square shape on the square outer peripheral portion of the spring hook portion 51 protruding outside the guide 20. It is assumed that it is hung on a typical state. As shown in FIG. 3, the lock spring 60 is formed of a spiral spring, and is disposed on the outer surface of the guide 20, and its inner end is hooked on the spring hook 51 of the hinge cam 50 described above. The outer end portion is provided in a state of being hooked on a spring hook portion 25 formed to protrude from the outer surface of the guide 20. Thereby, the lock spring 60 is configured to always exert an urging force that rotates the hinge cam 50 in the direction in which the rotation cam 40 is locked with respect to the guide 20.

  As shown in FIG. 7, the hinge cam 50 assembled between the ratchet 10 and the guide 20 has a central portion (in the through hole 50 </ b> A) from the end on the side where the spring hook 51 is formed. The operation pin 5A is inserted and is firmly joined together by welding. A flange portion having a diameter larger than that of the through hole 50A of the hinge cam 50 is formed at the end of the operation pin 5A opposite to the side inserted into the through hole 50A. The reclining lever 5 is integrally connected to the head by welding. As a result, the hinge cam 50 is integrally connected to the reclining lever 5 via the inserted operation pin 5A, and is rotated by the operation of lifting the reclining lever 5 as described above with reference to FIG. The cam 40 is rotated in the release operation direction (direction in which the lock state of each pole 30 is released).

  As shown in FIG. 7, the above-described operation pin 5 </ b> A is the same as the operation pin 5 </ b> A in which the end portion inserted into the through-hole 50 </ b> A of the above-described hinge cam 50 is similarly inserted in the other recliner 4 (not shown). The end portion and the connecting rod 5B are integrally connected to each other in the rotational direction. As a result, the operation pins 5 </ b> A inserted through the recliners 4 on the respective sides are simultaneously operated to rotate the shaft by the operation of the reclining lever 5. The operating portion 53 of the hinge cam 50 described above is in a state in which the shaft portion 52 described above is attached to the inner side surface of the disc body 21 of the guide 20 by being mounted in the through hole 21A of the guide 20. It is set as the state assembled | attached in the state which can transmit rotational power in the through-hole 41 of this.

  As shown in FIG. 4, the outer peripheral ring 90 is formed by annularly punching a thin steel plate into a ring shape and drawing the outer peripheral portion of the punched disc in the plate thickness direction. It has a cylindrical shape with a seat (pressing portion 91). The outer peripheral ring 90 has a seat portion formed on the inner peripheral portion applied to the cylindrical portion 12 of the ratchet 10 from the outside in the axial direction as a pressing portion 91 that supports the cylindrical portion 12 from the outer side in the axial direction. It is supposed to function. Further, the outer peripheral portion of the outer peripheral ring 90 that extends in a cylindrical shape functions as a coupling portion 92 that is caulked and coupled to the outer peripheral portion of the guide 20.

  Specifically, the coupling portion 92 has a shape in which four portions in the circumferential direction are thinned in the axial direction, a caulking piece 92A protruding in the axial direction, and an abutting portion recessed in the axial direction. 92B is formed in a concavo-convex shape that alternately repeats in the circumferential direction. Each of the caulking pieces 92A described above is inserted from the inner side to the outer side in the axial direction into each of the concave portions 26 formed in the outer peripheral portion of the guide 20 when the outer peripheral ring 90 is fitted and attached to the outer peripheral portion of the guide 20. It has become a part. Each of the caulking pieces 92 </ b> A is configured such that the end portion into which the caulking piece 92 </ b> A is inserted is bent inward in the radial direction and caulked to the outer peripheral portion of the guide 20 (see FIGS. 6 to 7). These caulking pieces 92 </ b> A are formed over approximately 30% of the entire peripheral area of the outer peripheral ring 90.

  Further, each abutting portion 92B abuts from the inner side in the axial direction on each convex portion 27 formed on the outer peripheral portion of the guide 20 when the outer peripheral ring 90 is fitted and attached to the outer peripheral portion of the guide 20. Thus, it is a part for positioning the insertion position in the axial direction. The abutting portions 92B are respectively attached to the convex portions 27 of the outer peripheral ring 90 from the inner side in the axial direction when caulking the tips of the caulking pieces 92A described above to the outer peripheral portion of the guide 20, respectively. The piece 92 </ b> A functions as a support portion for exerting a strong caulking force to press the tip portion of the piece 92 </ b> A against the outer surface in the axial direction of the outer peripheral portion of the outer peripheral ring 90.

  Specifically, as shown in FIG. 7, the outer peripheral ring 90 described above is set by the ratchet 10 and the guide 20 being assembled in order in the axial direction inside the cylinder. The cylindrical portion 12 is applied from the outside in the axial direction. As a result of the assembly, the outer ring 90 is inserted into the recesses 26 formed on the outer peripheral portion of the guide 20 from the inner side to the outer side in the axial direction, and the respective abutting pieces 92A of the coupling portion 92 are abutted. The portion 92B is abutted from the inner side in the axial direction against each convex portion 27 formed on the outer peripheral portion of the guide 20, and the axial insertion position with respect to the guide 20 is positioned.

  Then, after the assembly, the end portions protruding outward in the axial direction from the concave portions 26 of the guides 20 of the caulking pieces 92A of the outer peripheral ring 90 are used as the radii with the abutting portions 92B described above as axial supports. It is bent inward in the direction and caulked on the outer surface in the axial direction of the outer peripheral portion of the guide 20. As a result, the coupling portion 92 of the outer ring 90 is the same in such a manner that the outer peripheral portion of the guide 20 is sandwiched from both sides in the axial direction by the bent end portions of the caulking pieces 92A and the abutting portions 92B. It will be in a state where it is caulked integrally with the outer periphery. As a result of the assembly, the outer peripheral ring 90 is rotated without causing the ratchet 10 to fall off with respect to the guide 20 in the axial direction, with the holding portion 91 facing the cylindrical portion 12 of the ratchet 10 from the outside in the axial direction. It will be in the state kept in.

  Here, as shown in FIG. 6, each of the caulking pieces 92 </ b> A of the outer circumferential ring 90 described above has each corner portion in the circumferential direction bent to the outer side surface in the axial direction of the outer circumferential portion of the guide 20. Each of them is formed as a chamfered portion 92A1 chamfered in a 45 degree shape. Due to the formation of the chamfered portions 92A1, the caulking pieces 92A have a radially inner region that interferes with the protrusions 24C formed on the axially outer surface of the guide 20 unless the chamfered portions 92A1 are formed. It is made into the state bent to the shape extended greatly to.

  That is, on the outer side surface in the axial direction of the guide 20 described above, the guide groove 24 (each pole housing groove 24A and cam housing groove 24B) is formed on the outer side surface in the axial direction in accordance with the half punching process. The protrusion 24C to be formed is formed. The protrusions 24C are in a state in which the protrusion shapes protruding outward in the axial direction accompanying the formation of the respective pole receiving grooves 24A are formed at four positions in the circumferential direction. Accordingly, the caulking pieces 92A of the outer peripheral ring 90 that are caulked on the respective regions between the circumferential directions are not formed with the chamfered portions 92A1 described above. Only the position on the near side that interferes with the standing wall portion protruding to the back side of the pole housing groove 24A can be projected inward in the radial direction.

  However, each caulking piece 92A of the outer peripheral ring 90 has a chamfered portion 92A1 chamfered in a 45 degree shape at each corner in the circumferential direction of the caulking end portion thereof. These chamfered portions 92A1 are cut into a shape parallel to the circumferential side surface of the standing wall portion protruding to the back side of each pole receiving groove 24A constituting the protrusion 24C. Accordingly, the caulking pieces 92A can be formed to extend inward in the radial direction as much as gaps are generated by forming the chamfered portions 92A1, and the caulking allowance in the radial direction by the caulking pieces 92A is widely secured. Can do. As a result, it is possible to further increase the axial stopper strength of the ratchet 10 and the guide 20 by the outer peripheral ring 90.

  Each caulking piece 92A of the outer peripheral ring 90 described above is bent into a shape that protrudes more inward in the radial direction than the pressing portion 91 applied to the cylindrical portion 12 of the ratchet 10, as shown in FIGS. It is in a state. Each caulking piece 92A is provided as a state applied to the side frame 3Fa of the seat cushion 3 to which the outer side surface in the axial direction of the guide 20 is coupled from the inner side in the axial direction. It has become. Here, the side frame 3Fa corresponds to a “joining member” of the present invention.

  Specifically, each caulking piece 92 </ b> A is provided as an axially sandwiched state between the outer periphery of the guide 20 and the side frame 3 </ b> Fa of the seat cushion 3. Thereby, each caulking piece 92 </ b> A receives a large load between the seat back 2 and the seat cushion 3 so as to forcibly rotate and displace them in the front-rear direction from the locked state, and the ratchet 10 and the guide 20. Even if a peeling load that pulls them apart in the middle is generated, the movement of each caulking piece 92A to be pushed open outward in the axial direction by this force is strongly suppressed by the support by the side frame 3Fa of the seat cushion 3 It is supposed to be. Therefore, it is possible to exert higher anti-slip strength in the axial direction between the ratchet 10 and the guide 20 by the outer peripheral ring 90.

  That is, as shown in FIG. 4, the outer peripheral ring 90 has a high structural strength in which a pressing portion 91 that applies the outer peripheral portion of the ratchet 10 from the outer side in the axial direction is formed endlessly over the entire periphery. On the other hand, the caulking piece 92A applied to the outer peripheral portion of the guide 20 from the outside in the axial direction is formed intermittently in a partial region in the circumferential direction (circumferential region of about 30 percent), and the structural strength is not easily generated. It has a configuration. Accordingly, the above-described caulking piece 92A, which is difficult to produce structural strength, has a structure capable of securing a large caulking allowance in the radial direction as described above, thereby preventing the ratchet 10 and the guide 20 from coming off in the axial direction by the outer peripheral ring 90. Can be raised appropriately.

  In summary, the recliner 4 of the present embodiment has the following configuration. That is, the recliner 4 is configured to connect the seat back 2 to a state in which the backrest angle can be adjusted with respect to the base (seat cushion 3) on the floor. The recliner 4 is formed between two disk-like connecting members (the ratchet 10 and the guide 20) assembled in the axial direction so as to be rotatable relative to each other, and the two connecting members (the ratchet 10 and the guide 20). Is installed between the outer periphery of the rotation stop mechanism (pole 30 and the like) and the two connecting members (the ratchet 10 and the guide 20) which are mounted on the shaft and assembled in the axial direction. And an outer peripheral ring 90 that is held in a state.

  In the outer ring 90, a first pressing part (pressing part 91) applied from the outer side in the axial direction to the outer peripheral part of the one side connecting member (ratchet 10) is formed endlessly over the entire circumference. A second pressing portion (caulking piece 92A) applied to the outer peripheral portion of the other side connecting member (guide 20) from the outside in the axial direction is a partial region in the circumferential direction (region of about 30 percent in the circumferential direction). And has a fitting margin (caulking margin) extending longer in the radial direction than the first pressing portion (pressing portion 91). As described above, the outer peripheral ring 90 has a high structural strength in which the second pressing portion (caulking piece 92A) formed in a partial region in the circumferential direction and having a low structural strength is formed over the entire circumference. Both of the connecting members (the ratchet 10 and the guide 20) by the outer peripheral ring 90 are formed in a shape having a fitting allowance (caulking allowance) extending longer in the radial direction than the first pressing portion (pressing portion 91). The anti-slip strength in the axial direction can be increased.

  In addition, the second pressing portion (caulking piece 92A) has a circumferential region that avoids interference with a protrusion (protrusion 24C) protruding on the outer surface in the axial direction of the other connecting member (guide 20). Is formed. Due to such a configuration, the second pressing portion (caulking piece 92A) of the outer peripheral ring 90 is provided in a state in which an overhang in the axial direction from the other connecting member (guide 20) is suppressed. be able to.

  Further, the second pressing portion (caulking piece 92A) is applied from the outside in the axial direction by a coupling member (side frame 3Fa) that is applied to and coupled to the outer side surface in the axial direction of the projection (projection 24C). It is provided as a broken state. With this configuration, the second pressing portion (caulking piece 92A) is not easily peeled and deformed in the axial direction by the support by the coupling member (side frame 3Fa). The axial stopper strength of the (ratchet 10 and guide 20) can be further increased.

  Further, the corners (chamfered portions 92A1) on both sides in the circumferential direction of the caulking piece 92A are cut in a shape parallel to each side surface in the circumferential direction of the protrusion 24C adjacent to the corner portions in the circumferential direction. . With this configuration, the caulking piece 92A can be formed so as to project more widely in the circumferential direction and the radial direction, and the axial direction of the other connecting member (guide 20) by the outer peripheral ring 90 The anti-separation strength can be further increased.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, the recliner of the present invention can be applied to a seat other than the left seat of an automobile, and can also be widely used for a vehicle other than an automobile such as a railway, and a seat used for other vehicles such as an aircraft and a ship. It can be applied. The base to which the seat back is connected may be a bracket provided on the floor, in addition to a seat cushion provided on the floor.

  The recliner is not a rotating cam that rotates together with the hinge cam, but a structure in which the pole is pressed against or released from the inner peripheral tooth surface of the ratchet by a slide cam that slides in the radial direction by the axial rotation of the hinge cam. Also good. Further, the recliner may be configured to mesh two or three poles with the inner teeth row of the ratchet. Further, the recliner of the present invention is not limited to the type of configuration for performing the switching operation of unlocking as shown in the above-described embodiment, but is an internal gear as disclosed in documents such as JP 2010-187906 A ( It is also applied to a type of configuration in which a disk-shaped connecting member) and an external gear (disk-shaped connecting member) are pressed against each other and rotated relative to each other in such a manner that their meshing positions are changed. It is something that can be done.

  Further, the ring member may be configured such that the second pressing portion is integrally coupled to the ratchet, and the first pressing portion is applied to the outer peripheral portion of the guide from the outside in the axial direction. . Moreover, the 2nd holding | suppressing part may be formed only in one place of the circumferential direction, and may be formed in several places of equal intervals or unequal intervals. Further, the protrusion protruding on the outer side surface in the axial direction of the coupling member on the other side is formed so as to protrude on the outer side surface in the axial direction for some purpose, such as a pin for hooking a spring. What is necessary is just and it is not limited to a specific protrusion. Further, the configuration in which the second pressing portion is placed from the outside in the axial direction by the coupling member is provided with a protruding portion protruding outward in the axial direction at any location of the second pressing portion. You may make this protrusion contact | abut to a coupling member.

  Further, the cut shape of the corner formed on the caulking piece of the ring member is appropriately formed according to the arrangement of the protrusions, and does not necessarily have to be on the corner on both sides in the circumferential direction. Further, the shape is not limited to the 45 ° chamfered shape, and may be cut into an arc shape, a rectangular shape, or other shapes. Further, the cut shape of the corner portion may be formed such that the tip surface of the caulking piece of the ring member is tapered into a shape other than a trapezoid such as a triangular shape or a semicircular shape. Moreover, you may form in the shape made to taper in the shape of a right triangle.

1 Seat 2 Seat Back 2F Back Frame 2Fa Side Frame 2Fa1 Dowel Hole 2Fa2 Through Hole 2Fc Bracket 3 Seat Cushion (Base)
3F Cushion frame 3Fa Side frame (coupling member)
3Fa1 Dowel hole 3Fa2 Through hole 3Fc Bracket 4 Recliner 5 Reclining lever 5A Operation pin 5B Connecting rod 6 Return spring 10 Ratchet (One side connecting member)
11 Disc main body 11A Through-hole 11B Dowel 11C Fitting protrusion 12 Cylindrical portion 12A Internal tooth row 20 Guide (connecting member on the other side)
21 Disc body 21A Through hole 21B Dowel 21C Sliding surface 23 Guide wall 24 Guide groove 24A Pole receiving groove 24B Cam receiving groove 24C Protrusion 25 Spring hook portion 26 Recessed portion 27 Protruding portion 30 Pole 30A to 30D Pole 31 External tooth row 32 Leg portion 33 Hook projection 34 Lifting projection 40 Rotating cam 41 Through hole 42 Recessed portion 43 Shoulder portion 44 Support portion 45 Fitting projection 50 Hinge cam 50A Through hole 51 Spring hook portion 52 Shaft portion 53 Operation portion 60 Lock spring 70 Free zone plate 71 Through-hole 72 Fitting hole 73 Relief hole 74 Riding part 80 Release plate 81 Through-hole 82 Fitting hole 83 Retraction hole 90 Outer ring (ring member)
91 Presser (first presser)
92 Coupling part 92A Caulking piece (second pressing part)
92A1 Chamfered part 92B Abutting part

Claims (3)

A recliner that connects the seat back to the base on the floor so that the backrest angle can be adjusted,
Two disk-shaped connecting members assembled in an axial direction so as to be rotatable relative to each other;
An anti-rotation mechanism that is provided between the two connecting members and stops the relative rotation thereof;
A ring member that is mounted across the outer periphery of the two connecting members and holds them in an axially assembled state;
In the ring member, a first pressing portion applied to the outer peripheral portion of the one side connecting member from the outside in the axial direction is formed endlessly over the entire circumference, and the outer periphery of the other side connecting member The second pressing portion applied to the portion from the outside in the axial direction is formed in a partial region in the circumferential direction, and has a shape having a fitting margin extending longer in the radial direction than the first pressing portion. A recliner characterized by The recliner according to claim 1,
The recliner, wherein the second pressing portion is formed in a circumferential region that avoids interference with a protrusion projecting on an outer surface in the axial direction of the connecting member on the other side. The recliner according to claim 2,
The recliner, wherein the second pressing portion is provided in a state of being applied from the outside in the axial direction by a coupling member that is applied to and coupled to the outside surface in the axial direction of the protrusion.

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