JP4826752B2 - Fitting device - Google Patents

Description

  The present invention relates to a joint device such as a reclining device used for a vehicle seat. Specifically, the rotating member is disposed between two rotating members disposed on the same axis, and has a state in which relative rotation of the rotating members is allowed and a state in which relative rotation is restricted. The present invention relates to a joint device for connecting moving members.

2. Description of the Related Art Conventionally, some seats for a vehicle are provided with a reclining device that can adjust the inclination angle of a seat back serving as a backrest portion. A technique related to this type of reclining device is disclosed in, for example, Patent Document 1 below. That is, as in this disclosure, in general, the reclining device includes a pivot mechanism that pivotally supports the seat back at the lower end thereof, and a lock mechanism that operates to regulate the pivot of the pivot mechanism. And have. The return mechanism is assembled with a return spring that urges the seat back to turn forward. Further, the lock mechanism is normally held in an urged state of rotation restriction. Then, the lock mechanism is released and switched by operating a lever provided on the seat. Therefore, the seat back can be automatically rotated forward by releasing the rotation restricting state of the lock mechanism by the lever operation.
Further, in this disclosure, a damper mechanism is assembled outside the reclining device. This damper mechanism attenuates the rotational biasing force of the seat back using the viscous resistance of the viscous material filled therein. Thereby, it can suppress so that the rotation to the front direction of a seat back may not attach too much.
JP 2003-48466 A

  However, the technique disclosed in Patent Document 1 has a configuration in which the damper mechanism is externally attached to the reclining device, which causes an increase in the size of the entire structure.

  The present invention was devised to solve the above-described problems, and the problem to be solved by the present invention is that the structure is not enlarged even if a damper mechanism is assembled to a joint device such as a reclining device. Is to make it.

In order to solve the above problems, the joint device of the present invention takes the following means.
First, the first invention is arranged between two rotating members arranged coaxially, and has a state in which relative rotation of both rotating members is allowed and a state in which relative rotation is restricted. A first coupling member and a second coupling member, which are assembled so as to be relatively rotatable coaxially so as to overlap each other's disk-shaped inner disk surfaces; an outer teeth member having outer teeth on the outer circumferential surface of the disposed radially between the inner board of the joint member and have a. The first joint member is adapted to be joined to one of the two rotating members. The first joint member projects in the axial length direction toward the inner surface of the second joint member along the peripheral edge of the disk shape, and the projected inner A cylindrical inner tooth portion having inner teeth on the peripheral surface is formed . The second joint member is joined to the other of the two rotating members, and has an axial length so as to be fitted from the outer peripheral side into the inner tooth portion of the first joint member along the periphery of the disk shape. A cylindrical enclosure projecting in the direction is formed . The external tooth member is assembled in a state in which movement in the circumferential direction is restricted with respect to the second joint member so that the external tooth member can move only in the radial direction. Is engaged with the internal teeth of the first joint member, so that the relative rotation of both joint members is restricted, and the relative rotation is allowed by releasing the engagement . Brake means is provided between the joint members to change the relative rotational speed when the relative rotation of the joint members is allowed . The braking force by the braking means changes when the relative rotation of both joint members exceeds a predetermined rotation area . The braking means is a rolling member that is disposed in a concave rolling groove formed at the mating portion of the first joint member and the second joint member. The rolling member is provided in contact with both joint members, and rolls in the rolling groove with relative rotation of both joint members. The predetermined rotation area is a rotation area until the rolling member reaches the terminal end of the rolling groove due to relative rotation of both joint members. The braking force accompanying sliding friction acts between the one joint member and the rolling member that stops rolling.
According to the first invention, the braking means is provided between the two joint members, and is incorporated into the joint device. This braking means changes the braking force exerted when the relative rotation of both joint members exceeds a predetermined rotation region. In the rotation region accompanying the rolling of the rolling member, the rolling friction of the rolling member mainly acts, and the braking force that suppresses the relative rotational speed of both joint members acts weakly. When the rolling member reaches the end of the rolling groove and stops rolling, the sliding friction of the rolling member mainly acts in the subsequent rotation region, and the relative rotation speed of both joint members is suppressed. The braking force is strong.

Next, according to a second aspect of the present invention, in the first aspect described above, the rolling member and the rolling groove are at least three places on the circumference of the inner tooth portion of the first joint member or the enclosure portion of the second joint member. It is characterized by being arranged in.
According to the second aspect of the invention, the rolling member is disposed between the inner tooth portion of the first joint member and the enclosure portion of the second joint member. Thereby, a rolling member is provided in the state which contacted the surface which faces the radial direction of both joint members. Therefore, by disposing such rolling members at at least three locations on the circumference, both joint members are supported and centered at three or more points in the circumferential direction.

Next, the third invention is the above-described first or second invention, wherein the rolling member and the rolling groove are on the circumference in the inner tooth portion of the first joint member or the enclosure portion of the second joint member. They are arranged in pairs at axially symmetric positions.
According to the third aspect of the invention, the rolling member is disposed between the inner tooth portion of the first joint member and the enclosure portion of the second joint member. Thereby, a rolling member is provided in the state which contacted the surface which faces the radial direction of both joint members. Therefore, when such rolling members are arranged in pairs at the circumferentially axially symmetric positions, both joint members are supported at both ends at the axially symmetric positions and are centered.

Next, according to a fourth aspect of the present invention, in any one of the first to third aspects described above, the end portion of the rolling groove is formed in an expanded shape that widens the opening of the groove. A rolling member rides on an inclined surface forming an open surface.
According to the fourth aspect of the invention, when the rolling member rides on the inclined surface, the supporting force (component force) by which the rolling member presses both joint members inward and outward in the radial direction is increased.

Next, a fifth invention is characterized in that, in any one of the first to fourth inventions described above, the joint device is configured as a reclining device for adjusting an inclination angle of a seat back of a seat for a vehicle seat. To do.
Here, when the joint device is configured as a reclining device, a spring member for urging the joint device in the rotational direction in which the seat back is raised is assembled. In this case, one joint member is integrally connected to the seat back, and the other joint member is connected to a fixing member such as a seat cushion or a vehicle floor.
According to the fifth aspect of the invention, the urging force that urges the seat back in the forward raising direction is suppressed by the braking means. The braking force by the braking means changes at a predetermined inclination angle of the seat back. Therefore, the behavior when raising the seat back can be variously adjusted by setting the strength of the braking force and the boundary angle. For example, the seat back may be raised with good elasticity up to a predetermined angle range, and the seat back may be gently raised when the predetermined angle range is exceeded.

The present invention can obtain the following effects by taking the above-described means.
First, according to 1st invention, a damper mechanism can be assembled | attached, without enlarging a coupling apparatus by incorporating the braking means in the inside of a coupling apparatus. Further, the behavior of relative rotation of both joint members can be variously adjusted by setting the strength of the braking force by the braking means and the setting of the boundary region .
Furthermore, according to the second invention, the joint members are supported by at least three points on the circumference by the rolling members and are centered with each other, thereby suppressing the eccentric movement of the joint members due to the action of gravity or the like. The relative rotation can be smoothed.
Furthermore, according to the third aspect of the present invention, both the joint members are axially symmetrically supported and centered by the rolling member, whereby the eccentric movement of the both joint members due to the action of gravity or the like can be suppressed, and the relative rotation can be suppressed. The movement can be smoothed.
Furthermore, according to the fourth aspect of the present invention, both the joint members can be centered better by increasing the supporting force for supporting both the joint members radially inward and outward by the rolling members.
Furthermore, according to 5th invention, the usability of a reclining apparatus can be improved by applying the coupling apparatus provided with the said structure to a reclining apparatus.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings. In the following embodiments, the configuration according to the joint device of the present invention is employed as a vehicle seat reclining device.

  First, the configuration of the reclining device 4 according to the first embodiment will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the internal structure of the reclining device 4 as viewed from the front. FIG. 2 is an exploded perspective view of the reclining device 4. 3 is a cross-sectional view taken along line AA of FIG. FIG. 4 is an enlarged view of a main part showing a portion B of FIG. FIG. 5 is a side view showing a schematic configuration of the sheet 1. FIG. 6 is an enlarged perspective view showing a joint portion between the ratchet 10 and the cushion frame 3f. FIG. 7 is an enlarged perspective view showing a joint portion between the guide 20 and the back frame 2f.

The reclining device 4 of the present embodiment is configured as a joint device that connects the seat back 2 and the seat cushion 3 of the vehicle seat 1 as well shown in FIG. 5. The reclining device 4 is disposed as a pair on both the left and right sides of the seat 1 and is positioned between a back frame 2 f that forms the skeleton of the seat back 2 and a cushion frame 3 f that forms the skeleton of the seat cushion 3. These are consolidated. Specifically, the reclining device 4 is connected so that the back frame 2f can rotate relative to the cushion frame 3f around the rotation shaft 4a. Here, the reclining device 4 is connected to an operation lever (not shown), and is always urged and held in a locked state in which the relative rotation is restricted before the operation lever is operated. The reclining device 4 is switched to the unlocked state that allows the relative rotation by performing a predetermined release operation of the operation lever. Here, the cushion frame 3f corresponds to one of the two rotating members in the present invention, and the back frame 2f corresponds to the other of the two rotating members in the present invention.
Therefore, according to the reclining device 4 having the above-described configuration, the inclination angle of the seat back 2 can be fixed before the operation lever is released. Then, the tilt angle (backrest angle) of the seat back 2 can be adjusted by releasing the operation lever. Further, the reclining device 4 is automatically switched back to the original locked state by urging by stopping the release operation of the release lever. Thereby, the seat back 2 can be held at the position of the adjusted inclination angle.

Next, the configuration of the reclining device 4 will be described in detail.
That is, the reclining device 4 includes one ratchet 10, guide 20, poles 30a and 30b, push member 40, cam member 50, spring member 60, set plate 70, and rolling member 80, as well shown in FIG. It is assembled and configured. Here, the ratchet 10 corresponds to the first joint member of the present invention, the guide 20 corresponds to the second joint member of the present invention, and the poles 30a and 30b correspond to the external tooth member of the present invention.

Specifically, the ratchet 10 is formed in a substantially disk shape. The ratchet 10 is formed with a cylindrical inner tooth portion 11 that protrudes in the axial direction from the inner disk surface 10a side along the periphery of the disk shape. The inner tooth portion 11 is formed by half-punching of the ratchet 10 in the plate thickness direction, and further, inner teeth 11b are formed along the cylindrical inner peripheral surface. And the toothless surface 11d which does not have a tooth | gear is formed in the position of two places where the internal peripheral surface opposes the circumferential direction. The toothless surface 11d is formed as a shape protruding radially inward from the tooth tip of the inner tooth 11b.
In addition, a shaft hole 10c penetrating in the axial direction is formed in the center portion of the disc shape of the ratchet 10. A shaft member (not shown) is inserted into the shaft hole 10c, and the ratchet 10 is pivotally supported by the shaft member.
As well shown in FIG. 6, dowels 12 a and D dowels 12 b are formed on the outer surface 10 b of the ratchet 10 side by side in the circumferential direction at positions spaced radially from the shaft hole 10 c. The dowels 12a and D dowels 12b are formed so as to protrude in the axial direction from the outer board surface 10b by half-punching of the ratchet 10 in the plate thickness direction, and corresponding dowel holes 3a and D dowels formed in the cushion frame 3f. It fits in each hole 3b. Here, the D dowel 12b described above is formed in a shape in which a part of a columnar shape is cut out in a D-shaped cross section, and the shape is distinguished from the columnar dowel 12a. As a result, the ratchet 10 can be fitted into the cushion frame 3f in a predetermined orientation. And thereby, both can be joined in the state which matched the axial hole 10c of the ratchet 10, and the through-hole 3c of the cushion frame 3f to the coaxial position.
Further, as well shown in FIG. 2, a plurality of concave rolling grooves 13 are formed on the outer peripheral surface of the internal tooth portion 11. These rolling grooves 13 are equally disposed at six positions in the circumferential direction of the inner tooth portion 11 as well shown in FIG. Thereby, each rolling groove 13 is arranged in a pair facing each other at an axially symmetric position on the circumference. A cylindrical rolling member 80 is disposed in each of the rolling grooves 13. Here, the groove width of each rolling groove 13 is formed larger than the diameter of the rolling member 80. Thereby, each rolling member 80 can roll within the range of the groove width of the rolling groove 13. The configuration of the rolling member 80 will be described in detail later.

Next, the guide 20 will be described. That is, the guide 20 is formed in a substantially disk shape as well shown in FIG. The guide 20 is assembled in an overlapping manner with the ratchet 10 with the disk-shaped inner board surface 20 a facing the inner board surface 10 a of the ratchet 10. As well shown in FIG. 3, the guide 20 is formed with a cylindrical enclosure 21 that protrudes in the axial direction from the inner plate surface 20 a side along the periphery of the disc shape. The cylindrical enclosure 21 is formed by half-punching of the guide 20 in the plate thickness direction, and is formed in a size that fits and surrounds the cylindrical inner teeth 11 of the ratchet 10 from the outer peripheral side. Has been. Therefore, in a state where the guide 20 and the ratchet 10 are assembled, the enclosure portion 21 restricts the movement of the ratchet 10 in the radial direction. In this assembled state, the internal teeth 11b formed on the internal teeth portion 11 of the ratchet 10 are exposed to the internal space formed between the two inner disk surfaces 10a and 20a.
As well shown in FIG. 2, a shaft hole 20 c penetrating in the axial direction is formed in the center of the disk shape of the guide 20. As shown well in FIG. 3, the shaft hole 20 c is aligned with the shaft hole 20 c of the ratchet 10 in a coaxial position when the guide 20 and the ratchet 10 are assembled. The shaft member (not shown) is inserted into the shaft hole 20c, and the guide 20 is pivotally supported by the shaft member. By the support by the shaft member, the ratchet 10 and the guide 20 are in a state in which they can rotate relative to each other around the same axis.
As well shown in FIG. 6, dowels 22 a and D dowels 22 b are formed on the outer plate surface 20 b of the guide 20 side by side in the circumferential direction at positions spaced radially from the shaft hole 20 c. The dowels 22a and D dowels 22b are formed so as to protrude in the axial direction from the outer board surface 20b by half-punching of the guide 20 in the plate thickness direction, and corresponding dowel holes 2a and D dowels formed in the back frame 2f. The holes 2b are fitted in the holes, respectively. Here, the D dowel 22b is formed in a shape in which a part of a cylindrical shape is cut out in a D-shaped cross section, and the shape is distinguished from the cylindrical dowel 22a. As a result, the guide 20 can be fitted into the back frame 2f in a predetermined orientation. And thereby, both can be joined in the state which matched the axial hole 20c of the guide 20, and the through-hole 2c of the back frame 2f to the coaxial position.
As well shown in FIG. 1, grooves 23 a to 23 d that are recessed in the axial direction in a cross shape are formed on the inner board surface 20 a of the guide 20. These groove parts 23a-23d are formed in a continuous shape by half punching in the plate thickness direction of the guide 20 (see FIG. 2). Of these, the grooves 23a and 23b are formed in a shape that can accommodate the poles 30a and 30b so as to be slidable in only one radial direction. Further, the grooves 23c and 23d are formed in a series of indentations as shapes that can accommodate the pushing member 40 so as to be slidable only in one radial direction perpendicular to the sliding direction of the poles 30a and 30b. ing.
As well shown in FIG. 2, a spring hook portion 24 for hooking an outer end portion 61 of a spring member 60 described later is formed on the outer plate surface 20 b of the guide 20. The spring hook portion 24 is formed in a protruding shape that protrudes in the axial direction from the outer board surface 20b. It should be noted that the spring hooks 24 are formed in advance in two circumferential directions on the outer board surface 20b so as to be able to cope with the case where the spring member 60 is assembled in a different direction (biasing direction).

Next, the poles 30a and 30b will be described. That is, the poles 30a and 30b are formed in a plate-like shape, as well shown in FIGS. 1 and 2, and in the grooves 23a and 23b formed at the axially symmetrical positions of the guide 20 in the circumferential direction, respectively. It is housed and arranged. Thereby, each of the poles 30a and 30b can slide inward and outward in the radial direction of the guide 20 along the guide shape of the groove portions 23a and 23b. Here, as for each pole 30a, 30b, the outer teeth 31a, 31b are formed in the outer peripheral surface of the radial direction, respectively. Therefore, as shown well in FIG. 1, the inner teeth 11b of the ratchet 10 exposing the outer teeth 31a, 31b in the traveling direction by sliding the poles 30a, 30b outward in the radial direction. Can be engaged. As a result, the relative rotation of the ratchet 10 and the guide 20 is restricted via the meshed poles 30a and 30b. That is, the reclining device 4 is locked.
Further, each of the poles 30a and 30b is formed with leg portions 32a1 and 32a2 and leg portions 32b1 and 32b2 in the radially inner portion. The leg portions 32a1 and 32a2 and the leg portions 32b1 and 32b2 function as extruded portions when the poles 30a and 30b are pushed outward in the radial direction by a pushing member 40 described later.
In addition, each of the poles 30a and 30b has a radially inner portion formed in a hollow shape, and hooking claws 33a and 33b are formed in part of the hollowed shape. The hooking claws 33a and 33b function as hooking portions when the poles 30a and 30b are pulled back inward in the radial direction by the pushing member 40.
Here, the poles 30a and 30b are sandwiched between the inner board surface 20a of the ratchet 10 and the inner board surface 10a of the ratchet 10 in a state of being accommodated in the grooves 23a and 23b of the guide 20, as well shown in FIG. It is held as a state. Thereby, each pole 30a, 30b is hold | maintained as the state to which the movement to the axial direction was controlled.

Next, the pushing member 40 will be described. That is, the pushing member 40 is formed in a plate-like shape as well shown in FIGS. 1 and 2, and the groove portions 23c and 23d formed at positions that are perpendicular to the groove portions 23a and 23b of the guide 20 described above. It is housed and arranged inside. As a result, the pushing member 40 is slidable in the radial direction perpendicular to the poles 30a and 30b along the guide shape of the grooves 23c and 23d.
Further, a through hole 41 penetrating in the axial direction is formed in the central portion of the pushing member 40. The through hole 41 is formed in a cam hole shape that can be accommodated in a state in which an arm portion 52 of a cam member 50 described later is loosely fitted. The pushing member 40 is slid in the radial direction described above by being pressed by the cam member 50 that rotates inside the through hole 41. FIG. 1 shows a state in which the pushing member 40 is pushed in the left direction in the drawing.
Further, as well shown in FIG. 1, on both side surfaces of the pushing member 40, specifically, on both side surfaces on which the poles 30a and 30b are arranged, concave portions 42a1 and 42a2 having a shape partially recessed in the radial direction. And the recessed parts 42b1 and 42b2 are formed, respectively. The recesses 42a1 and 42a2 and the recesses 42b1 and 42b2 are the leg portions 32a1 and 32a2 and the leg portions 32b1 and 32b2 of the poles 30a and 30b in a state (not shown) before the pushing member 40 is pushed leftward. It is in the state where it entered each. In this state, each of the poles 30a and 30b can be held in a state of being retracted from the inner teeth 11b of the ratchet 10 to the radially inner position. Then, when the pushing member 40 is pushed leftward, the leg portions 32a1, 32a2 and the leg portions 32b1, 32b2 of the respective poles 30a, 30b are pushed up from the recessed portions 42a1, 42a2 and the recessed portions 42b1, 42b2, respectively. It is made to ride on shoulder parts 43a1 and 43a2 and shoulder parts 43b1 and 43b2 on the side. As a result, as shown in FIG. 1, the poles 30a and 30b are pushed outward in the radial direction, and the external teeth 31a and 31b are engaged with the internal teeth 11b of the ratchet 10 exposed in the traveling direction. be able to.
Further, as well shown in FIG. 1, hook portions 44a and 44b having a shape projecting in the radial direction so as to enter the thinning shape of the respective poles 30a and 30b are formed on both side surface portions of the pushing member 40. ing. The hook portions 44a and 44b are respectively hooked and engaged with the hooking claws 33a and 33b of the respective poles 30a and 30b by sliding the pushing member 40 to the right from the state position shown in FIG. . As a result, the pawls 30a and 30b are drawn inward in the radial direction as the pushing member 40 slides, and the meshed state between the pawls 30a and 30b and the ratchet 10 is released.

Next, the cam member 50 will be described. That is, the cam member 50 includes a pin-shaped shaft portion 51 and an arm portion 52 having a shape protruding in the radial direction with respect to the shaft portion 51, as well shown in FIG. The former shaft portion 51 is inserted into the shaft hole 20c of the guide 20 and assembled so as to be rotatable. As shown well in FIG. 1, the latter arm portion 52 is disposed on the inner board surface 20 a of the guide 20 and assembled in a state of being accommodated in the through hole 41 of the pushing member 40. The cam member 50 is integrally connected to the above-described operation lever (not shown), and is rotated with the operation lever.
2, the cam member 50 has an inner end 62 of a spring member 60, which will be described later, hooked on a spring hooking portion 53 having a rectangular cross section provided integrally with the shaft portion 51. As shown in FIG. Yes. Thereby, the cam member 50 is normally urged to rotate in the counterclockwise direction shown in FIG. 1, and urges the pushing member 40 to press in the left direction shown in FIG.
Therefore, the reclining device 4 is always urged and held in the locked state (the state shown in FIG. 1) by the action of the urging force applied to the cam member 50 before the operation lever is released. Then, by performing the release operation of the operation lever against the above urging, the reclining device 4 can be switched to the unlocked state by pushing the pushing member 40 in the right direction in FIG.

  Next, the spring member 60 will be described. That is, as shown well in FIG. 2, the spring member 60 is a known winding spring, and its outer end 61 is hooked to one of the spring hooks 24 formed on the outer plate surface 20b of the guide 20 described above. Has been. The inner end 62 is engaged with the spring hook 53 of the cam member 50. Thereby, the cam member 50 is urged to rotate counterclockwise as shown in FIG.

Next, the set plate 70 will be described. That is, as is well shown in FIG. 2, the set plate 70 is formed in a substantially cylindrical shape (annular shape) by half-cutting a thin plate-like disk member in the plate thickness direction. The set plate 70 functions as a pressing member that sandwiches and presses the ratchet 10 and the guide 20 assembled in an overlapping manner in the thickness direction. The set plate 70 is formed thinner than the ratchet 10 and the guide 20.
Specifically, the set plate 70 has a substantially uniform cross-sectional shape in the circumferential direction, and the cross-sectional shape is shown in detail in FIG. That is, the cross-sectional shape of the set plate 70 is formed in a step shape so as to follow the outer peripheral shape of the assembled ratchet 10 and guide 20. Specifically, the set plate 70 has an outer plate holding surface in which a vertical surface on the left end side of the set plate 70 is brought into contact with a peripheral surface 11 a on the inner plate side of the internal tooth portion 11 formed by half-cutting along the outer peripheral edge of the ratchet 10. 71 is formed. And from this outer board | substrate holding surface 71, it bend | folds perpendicularly along the outer peripheral surface of the internal tooth part 11, and the horizontal surface is formed. From there, it is further bent vertically along the peripheral surface 21a on the inner panel side of the enclosure portion 21 of the guide 20 to form a vertical surface. The vertical surface is formed as an inner plate holding surface 72 which is brought into contact with the peripheral surface 21a on the inner plate side of the enclosure portion 21. Further, from the inner board holding surface 72, a horizontal plane is formed by being bent vertically along the outer peripheral surface of the enclosure portion 21.
The set plate 70 formed in a stepped shape as described above is further bent vertically so that the horizontal surface on the right end side is along the peripheral surface 21b on the outer plate side of the enclosure 21 by caulking. . Thus, the bent vertical surface on the right end side is formed as a sandwiching surface 73 that is brought into contact with the outer peripheral surface 21b of the enclosure portion 21 on the outer panel side. That is, the set plate 70 sandwiches and presses the ratchet 10 and the guide 20 in the plate thickness direction by the sandwiched cross-sectional shape of the outer panel holding surface 71 and the sandwiching surface 73. Here, the outer plate holding surface 71 is formed with a protruding piece 71a that partially protrudes toward the outer peripheral surface 11a of the inner tooth portion 11 on the outer plate side. The protrusion 71 a allows the outer plate holding surface 71 and the peripheral surface 11 a on the outer plate side of the inner tooth portion 11 to always come into contact with each other at a fixed position (projection piece 71 a). The pinching force can be applied stably.

Next, the rolling member 80 will be described. That is, the rolling member 80 is arranged to be able to roll in each rolling groove 13 formed in the inner tooth portion 11 of the ratchet 10, as well shown in FIG. These rolling members 80 are interposed between the inner teeth portion 11 of the ratchet 10 and the surrounding portion 21 of the guide 20 as shown well in FIG. 3, and the outer peripheral surface thereof is in contact with both members. Is provided. Specifically, each rolling member 80 is in contact with the surfaces of the ratchet 10 and the guide 20 that face in the radial direction. Therefore, referring to FIG. 1, the rolling members 80 having the above-described configuration are arranged at six locations (three or more locations) on the circumference, so that the ratchet 10 can be moved by each rolling member 80 in the guide 20. Supported from the outside in the radial direction. As a result, the ratchet 10 is positioned (centered) at a position coaxial with the guide 20.
The rolling members 80 are equally arranged at six positions on the circumference, and are arranged in pairs facing each other at the axially symmetric positions on the circumference. As a result, the ratchet 10 is supported at both ends by the respective rolling members 80 facing in axial symmetry, and is positioned (centered) well at a position coaxial with the guide 20.
When the ratchet 10 and the guide 20 rotate relative to each other, the rolling member 80 configured as described above rolls on the contact surface with both members and moves in each rolling groove 13. Specifically, as shown by the solid line in FIG. 4, for example, the state in which each rolling member 80 is arranged at the end portion (hereinafter, the start end portion 13 a) in the counterclockwise direction of each rolling groove 13 is illustrated. Set to the initial state. When the relative rotation in which the ratchet 10 rotates in the counterclockwise direction (the direction of the arrow) relative to the guide 20 occurs from this state, the rolling member 80 moves between the ratchet 10 and the guide 20. Rolls in the rolling groove 13 in the clockwise direction so as to be stroked on the contact surface. At this time, the frictional resistance generated between the ratchet 10 and the guide 20 that rotate relative to each other is mainly due to rolling friction of the rolling member 80 that rolls between them. Further, the movement of the ratchet 10 and the guide 20 that are about to be eccentric in the radial direction due to the action of gravity or the like is suppressed by the support by the rolling members 80 described above. Thereby, both relative rotation comes to be smoothly performed in the coaxial position without eccentricity mutually. Therefore, in the rotation area s accompanying the rolling of the rolling member 80, the braking force that suppresses the relative rotation speed of the ratchet 10 and the guide 20 acts relatively weakly.
Then, as indicated by the phantom line in FIG. 4, when the rolling member 80 reaches the end portion in the clockwise direction of each rolling groove 13 (hereinafter referred to as the termination portion 13 b) by the rolling, the rolling stops. . Thereby, the rolling member 80 becomes an integral state with respect to the relative rotation of the ratchet 10 in the counterclockwise direction. Therefore, when the relative rotation in which the ratchet 10 further rotates in the counterclockwise direction (the direction of the arrow) relative to the guide 20 from this state occurs, the guide 20 rolls relative to the guide 20 in the clockwise direction. The rolling member 80 that has stopped sliding slides against each other, and a resistance force (braking force) accompanying sliding friction acts between them. As a result, in the rotation region t after the rolling member 80 reaches the end portion 13 b of the rolling groove 13, the braking force that suppresses the relative rotation speed of the ratchet 10 and the guide 20 acts relatively strongly. In this embodiment, the rotation angle (rotation region s) until the rolling member 80 reaches the end portion 13b from the start end portion 13a of the rolling groove 13 is set to 29.1 degrees.

Next, the relationship between the rotation of the reclining device 4 and the tilting of the seat back 2 will be described with reference to FIGS. 4 and 5. In the following description, it is assumed that the relative rotation of the reclining device 4 is allowed. Here, although not shown in the drawings, the seat 1 of the present embodiment is assembled with a return spring that urges the seat back 2 forward. The return spring has an urging force that can automatically raise the seat back 2 forward when the reclining device 4 is allowed to rotate relative to the return spring.
First, in a state where the seat back 2 is tilted back to a substantially horizontal posture position, the rolling member 80 is located at the start end portion 13a of the rolling groove 13 as shown by the solid line in FIG. From this state, when the seat back 2 is raised by the urging force of the return spring, the ratchet 10 rotates in the counterclockwise direction (the direction of the arrow in FIG. 4) relative to the guide 20. Relative rotation occurs. When the seat back 2 is raised, the rolling member 80 reaches the end portion 13b of the rolling groove 13 as indicated by the phantom line in FIG. Thus, in this embodiment, the rotation region s until the rolling member 80 reaches the end portion 13b of the rolling groove 13 is an angle at which the weight moment load of the seat back 2 shown in FIG. 5 is relatively large. Region x is set. Therefore, in this region, since the action of the resistance force (braking force) that hinders the raising and turning of the seat back 2 is weak, the urging force required for the return spring can be reduced.
When the seat back 2 is further lifted by the urging force of the return spring, as described above, the resistance caused by the sliding friction between the ratchet 10 and the guide 20 is caused by the rolling member 80 that stops rolling. Force (braking force) is applied. As described above, in this embodiment, the resistance force (braking force) that hinders the raising and turning of the seat back 2 in the angle region y (the turning region t) where the raising and turning of the seat back 2 is likely to be elastic. ) Can be made to act relatively strongly to suppress the rotation speed.

Subsequently, a method of using the present embodiment will be described.
That is, as well shown in FIG. 5, the seatback 2 is switched to a state in which relative rotation of the reclining device 4 is allowed in a state where the seatback 2 is tilted back to a substantially horizontal posture position. Thereby, the seat back 2 is raised by the urging force of a return spring (not shown). At this time, in the angle region x until the seat back 2 is raised 29.1 degrees from the horizontal state, the seat back 2 is raised and rotated relatively well. When the seat back 2 is further raised and exceeds the angle region x, that is, when the seat back 2 enters the angle region y, the seat back 2 is raised along with the sliding friction of the rolling member 80 (see FIG. 4). The rotation speed is suppressed. Thereby, it is possible to suppress the raising of the seat back 2 from excessively pushing.

  As described above, according to the reclining device 4 of the present embodiment, the damper member can be assembled without increasing the size of the reclining device 4 by incorporating the rolling member 80 serving as the braking means inside the reclining device 4. it can. Moreover, the behavior of the relative rotation of the reclining device 4 can be variously adjusted according to the strength of the braking force to be exhibited and the setting of the boundary region, thereby improving usability. In addition, the ratchet 10 and the guide 20 are supported at six points (three or more points) that are symmetrical with respect to the circumference via the rolling member 80 and are centered with each other. The eccentric movement of 20 can be suppressed, and the relative rotation can be smoothed.

Then, the structure of the reclining apparatus 4 of Example 2 is demonstrated using FIG. FIG. 8 is an enlarged cross-sectional view of the main part of the reclining device 4. In the present embodiment, the same reference numerals are given to the portions having substantially the same configuration and operation as the reclining device 4 of the first embodiment, and the description thereof is omitted.
In this embodiment, the end portion 13b of the rolling groove 13 formed in the ratchet 10 is formed in an expanded shape that widens the opening of the groove. Therefore, as shown by the phantom line in FIG. 8, when the rolling member 80 reaches the end portion 13 b of the rolling groove 13, the rolling member 80 is on the inclined surface 13 c that forms the expanded surface of the expanded shape. It will be a form to ride. As a result, the force of the rolling member 80 stroking the contact surface between the ratchet 10 and the guide 20 and rolling in the clockwise direction causes the ratchet 10 and the guide 20 to move radially inward and outward through the inclined surface 13c. It comes to act as supporting force (component force) to press. Thereby, compared with the thing of the shape where the terminal part 13b of the rolling groove | channel 13 stood | rightened vertically, the said support force can be made to act stronger.

Next, the configuration of the reclining device 4 according to the third embodiment will be described with reference to FIG. FIG. 9 is an enlarged cross-sectional view of the main part of the reclining device 4. In the present embodiment, the same reference numerals are given to the portions having substantially the same configuration and operation as the reclining device 4 of the first embodiment, and the description thereof is omitted.
In the present embodiment, the rolling groove 25 for allowing the rolling member 80 to roll is formed in the enclosure portion 21 of the guide 20. When the ratchet 10 rotates relative to the guide 20 in the counterclockwise direction (in the direction of the arrow), the rolling member 80 rolls in the rolling groove 25 in the counterclockwise direction. It comes to move. Here, the rolling members 80 and the rolling grooves 25 are equally arranged at six positions in the circumferential direction, as in the case of the first embodiment.
Thus, even if the rolling groove 25 is formed on the guide 20 side and the rolling member 80 is set, the same effects as those of the first embodiment can be obtained.

As mentioned above, although embodiment of this invention was described using the three Examples, this invention can be implemented with various forms other than the said Example.
For example, in each of the above embodiments, the reclining device has been described as an example of the configuration corresponding to the joint device of the present invention, but the present invention can also be applied to other joint structures. In other words, any joint structure can be applied to various types of configurations as long as it is a joint structure for connecting rotating members that are coaxially arranged so as to be relatively rotatable.
Further, in order to position the ratchet and the guide at the coaxial position by the rolling member or the rolling groove, they should be disposed at least at three or more positions on the circumference. Further, the rolling members and the rolling grooves may not be evenly arranged on the circumference. Note that the rolling member and the rolling groove may be disposed only at two or one place on the circumference, but in this case, the ratchet and the guide are difficult to be positioned at the coaxial positions. It should be noted.
The rolling member is not limited to a cylindrical shape, and may be any shape that can roll in a rolling groove such as a sphere, an elliptical sphere, a hemisphere, a flat sphere, a cone, or an egg shape. In the above embodiment, the rolling members are individually arranged in the rolling grooves. However, the rolling members are synchronized in the rolling grooves or the rolling members are rolled. You may provide the protection member which protects so that it may not remove | deviate from a dynamic groove.
Moreover, although what showed the rolling member in contact with the surface which faces the radial direction of a ratchet and a guide was shown, as shown in FIG. 10, you may make it contact with the surface which faces these axial directions. The rolling member 80x shown in the figure is constituted by a sphere. However, since the rolling member 80x in this case does not support the ratchet 10 and the guide 20 in the radial direction, the rolling member 80x does not perform the function of positioning both in the coaxial position.
Moreover, the groove width of the rolling groove may be narrowed so that the rolling member does not roll. However, in this case, it should be noted that sliding friction always occurs during the relative rotation of the reclining device.

It is sectional drawing which represented the internal structure of the reclining apparatus of Example 1 in front view. It is a disassembled perspective view of a reclining apparatus. It is the sectional view on the AA line of FIG. It is a principal part enlarged view showing the B section of FIG. It is a side view showing a schematic structure of a sheet. It is the perspective view which expanded and represented the junction part of a ratchet and a cushion frame. It is the perspective view which expanded and represented the junction part of a guide and a back frame. It is sectional drawing which expanded and represented the principal part of the reclining apparatus of Example 2. FIG. It is sectional drawing which expanded and represented the principal part of the reclining apparatus of Example 3. FIG. It is sectional drawing which expanded and represented the principal part of the reclining apparatus as another modification.

Explanation of symbols

1 seat 2 seat back 2f back frame (the other of the rotating members)
2a Dowel hole 2b D Dowel hole 2c Through hole 3 Seat cushion 3f Cushion frame (one of rotating members)
3a Dowel hole 3b D Dowel hole 3c Through hole 4 Reclining device 4a Rotating shaft 10 Ratchet (first joint member)
10a Inner board surface 10b Outer board surface 10c Shaft hole 11 Inner tooth part 11a Outer board side peripheral surface 11b Inner tooth 11d No tooth surface 12a Dowel 12b D Dowel 13 Rolling groove 13a Start end part 13b End part 13c Inclined surface 20 Guide Joint member)
20a Inner plate surface 20b Outer plate surface 20c Shaft hole 21 Enclosure 21a Inner plate side peripheral surface 21b Outer plate side peripheral surface 22a Dowel 22b D Dowel 22c Fitting portion 23a-23d Groove portion 24 Spring hook portion 25 Rolling groove 30a, 30b Pole (External tooth member)
31a, 31b External teeth 32a1, 32b1 Leg part 32a2, 32b2 Leg part 33a, 33b Hook part 40 Pushing member 41 Through hole 42a1, 42b1 Depression part 42a2, 42b2 Depression part 43a1, 43b1 Shoulder part 43a2, 43b2 Shoulder part 44a, 44b Hook part 50 Cam member 51 Shaft part 52 Arm part 53 Spring hook part 60 Spring member 61 Outer end part 62 Inner end part 70 Set plate 71 Outer board holding surface 71a Protruding piece 72 Inner board holding surface 73 Holding surface 80 Rolling member 80x Rolling member s Rotating area t Rotating area x Angle area y Angle area

Claims (5)

The rotating member is disposed between two rotating members disposed on the same axis, and has a state in which the relative rotation of the rotating members is allowed and a state in which the relative rotation is restricted. A coupling device for coupling,
A first joint member and a second joint member assembled so as to be relatively rotatable coaxially so as to overlap each other's disk-shaped inner board surfaces;
An external tooth member disposed between the inner surface of the joint members and having external teeth on the outer peripheral surface in the radial direction,
The first joint member is joined to one of the two rotating members, and protrudes in the axial length direction toward the inner surface of the second joint member along the periphery of the disk shape. A cylindrical internal tooth portion having internal teeth is formed on the protruding inner peripheral surface,
The second joint member is joined to the other of the two rotating members, and is fitted into the inner tooth portion of the first joint member from the outer peripheral side along the peripheral edge of the disk shape. A cylindrical enclosure projecting in the axial direction is formed on the
The outer tooth member is assembled in a state in which movement in the circumferential direction is restricted with respect to the second joint member and is movable only in the radial direction. The external teeth are engaged with the internal teeth of the first joint member to restrict relative rotation of both joint members, and the relative rotation is permitted by releasing the engagement.
Between the joint members, there is provided braking means for changing the relative rotational speed when the relative rotation of the joint members is allowed, and the braking force by the braking means is such that the relative rotation of the joint members is performed. It will change when it exceeds a predetermined rotation area ,
The braking means is a rolling member disposed in a concave rolling groove formed at a mating portion of the first joint member and the second joint member, and the rolling member is attached to the joint members. It is provided in a contact state, and rolls in the rolling groove with the relative rotation of both joint members. The predetermined rotation area is formed by the relative rotation of the both joint members. The moving member is a rotating region until it reaches the end of the rolling groove. When the predetermined rotating region is exceeded, the rotating joint member and the rolling member that stops rolling fitting device braking force due to sliding friction, characterized that you act between. The joint device according to claim 1,
The rolling members and grooves are coupling device characterized that you have arranged in at least three locations on the circumference of the enclosing portions of the internal portion or the second coupling member of the first joint member. The joint device according to claim 1 or 2,
The said rolling member and rolling groove are arrange | positioned in a pair at the axially symmetrical position on the periphery in the internal tooth part of the said 1st joint member, or the enclosure part of the said 2nd joint member, The joint apparatus characterized by the above-mentioned. The joint device according to any one of claims 1 to 3 ,
End of the rolling groove is formed in a flared shape to widen the opening of the groove, that you have so ride said rolling members on the inclined surface forming the deployment plane of the enlarged open configuration A coupling device characterized. The joint device according to any one of claims 1 to 4,
Fitting device該継hand device is characterized in formed Rukoto as reclining device for adjusting the inclination angle of the seat back of the seat seat of the vehicle.

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