JP2009285026A - Coupling device of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance a lock strength without jumboizing a coupling device of a vehicle seat. <P>SOLUTION: The coupling device (a reclining device 4) of the vehicle seat is provided with a ratchet 10, a guide 20, pawls 30, 30, and a holding member 70. The pawls 30, 30 are respectively built on the guide 20, supported circumferentially, and engage the outer peripheral tooth planes 30a, 30a with the internal peripheral tooth plane 12a of the ratchet 10 so as to lock a relative rotation between both members. The holding member 70 is built on so that the ratchet 10 and the guide 20 could be axially latched. The ratchet 10 is provided with a supporting part 15 to axially receive the guide 20 and to radially support each other. A shell frame of a seat back is integrally coupled with an edge of the supporting part 15 in a board coupling direction so that a wall thickness of the internal peripheral tooth plane 12a in a radial or axial direction could increase. The holding member 70 is axially applied to an outer board face of the guide 20, and is integrally coupled with the shell frame of the seat back. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connecting device for a vehicle seat. Specifically, the present invention relates to a vehicle seat coupling device that couples two target members such that they can rotate relative to each other.

  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 via a reclining device, and an operation for adjusting a backrest angle thereof can be performed. Here, the following Patent Document 1 discloses the configuration of the reclining device described above. In the reclining device of this disclosure, a disc-shaped ratchet integrally connected to the skeleton portion of the seat back and a disc-shaped guide integrally connected to the skeleton portion of the seat cushion support each other rotatably. Thus, the structure is assembled in the axial direction.

A pole capable of locking the relative rotation is disposed between the ratchet and the guide. The pole is supported so as to be movable only inward and outward in the radial direction with respect to the guide. Then, the pole engages the outer peripheral tooth surface formed on the outer peripheral surface with the inner peripheral tooth surface of the cylindrical portion projecting in a cylindrical shape formed on the ratchet, thereby causing relative rotation between the ratchet and the guide. It is designed to lock.
JP 2007-130237 A

  However, in the prior art disclosed above, in order to reduce the size of the reclining device, for example, when the outer diameter of the ratchet is reduced, the thickness of the cylindrical portion of the ratchet that meshes the outer peripheral tooth surface of the pole is reduced, Since the tooth profile of the inner peripheral tooth surface becomes small, the lock strength of the reclining device is lowered.

  The present invention has been devised to solve the above-described problems, and the problem to be solved by the present invention is to increase the locking strength without increasing the size of the connecting device for a vehicle seat. .

In order to solve the above-mentioned problems, the vehicle seat coupling device of the present invention takes the following means.
A first invention is a vehicle seat coupling device that couples two target members so as to be relatively rotatable with each other, and includes two coupling members, a lock member, and a holding member. The two connecting members are integrally connected to one side or the other side of the two target members, respectively, and have disk-shaped portions that are assembled in the board-aligning direction so as to be relatively rotatable with each other. The lock member is disposed between the two connecting members, and the inner peripheral tooth surface formed on the other connecting member is assembled to the one connecting member and supported in the circumferential direction. By engaging the outer peripheral tooth surface, the relative rotation between the two connecting members is locked. The holding member is assembled so as to prevent the two connecting members from coming off in the axial direction. The other side coupling member is formed with a support portion that receives the one side coupling member in the axial direction so that the two coupling members support each other in the radial direction. The target member integrally connected to the other side connecting member is integrally connected to the end portion of the other side connecting member in the disc alignment direction, so that the radial or axial direction of the inner peripheral tooth surface can be obtained. The wall thickness is increased. The holding member is axially applied to the outer surface of the connecting member on one side, and is integrally connected to the target member connected to the connecting member on the other side.

  According to the first aspect of the present invention, the object member that is integrally connected to the other side connecting member is thicker in the radial direction or axial direction of the peripheral edge portion of the inner peripheral tooth surface than the other side connecting member. It is assembled to increase. Thereby, since the intensity | strength of the peripheral part of an internal peripheral tooth surface is raised, the lock intensity | strength at the time of meshing locking with a lock member is also raised. Thus, the locking strength can be increased without increasing the size of the connecting device for a vehicle seat. Further, the target member connected to the other side connecting member is integrally connected to the end portion in the board alignment direction of the connecting member. Therefore, by integrally connecting the holding member to the target member, the holding member can be formed as a simple-shaped member that is only applied to the outer surface of the connecting member on one side in the axial direction.

  Next, according to a second aspect of the present invention, in the first aspect described above, the inner peripheral tooth surface formed on the other side connecting member is a cylinder formed by protruding in a cylindrical shape in the axial direction on the other side connecting member. It is formed on the inner peripheral surface of the part. The support portion is formed so as to protrude in a cylindrical shape in the axial direction from the outer peripheral portion of the cylindrical portion. The target member connected to the other side connecting member is integrally connected to the support portion in a state where the target member is face-matched to the end surface portion in the disc alignment direction which is the end portion in the axial direction of the support portion.

  According to the second aspect of the invention, the support portion is formed so as to protrude further in a cylindrical shape in the axial direction from the outer peripheral portion of the cylindrical portion having the inner peripheral tooth surface in the connecting member on the other side. Then, by subjecting the target member to the end surface portion of the support portion in the disc alignment direction so as to be integrally connected, the thickness of the peripheral portion of the inner peripheral surface portion in the radial direction or the axial direction is increased. Thus, the structure which assembles | attaches a target member so that the thickness of the peripheral part of an internal peripheral surface part may be embodied and can be comprised.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the configuration of the vehicle seat coupling device according to the first embodiment will be described with reference to FIGS. Here, FIG. 2 shows a schematic configuration of the vehicle seat 1 of the present embodiment. In the vehicle seat 1, a seat back 2 that serves as a backrest is coupled to a seat cushion 3 that serves as a seating portion by a pair of left and right reclining devices 4 and 4 disposed at lower positions on both sides. Here, the reclining devices 4 and 4 correspond to the vehicle seat coupling device of the present invention.

  The reclining devices 4 and 4 are configured such that operation shafts 4c and 4c that perform a switching operation of unlocking inserted into the reclining devices 4 and 4 are integrally connected to each other by a connecting rod 4r. Thereby, each reclining device 4, 4 is in a locked state in which the backrest angle of the seat back 2 is fixed, and in a released state in which the fixed state is released and the backrest angle of the seat back 2 can be adjusted. Mutual unlocking switching operations are performed synchronously. Here, the reclining devices 4 and 4 are always switched and held in the operating state locked by the urging force.

  The reclining devices 4, 4 are unlocked simultaneously by performing a pulling operation of the operation lever 5 provided at the side position of the seat cushion 3. Thereby, since the fixed state of the backrest angle of the seat back 2 is released, the backrest angle can be adjusted. Then, by adjusting the backrest angle of the seat back 2 and stopping the release operation of the operation lever 5, the reclining devices 4 and 4 are returned to the locked state by urging again, so that the seat back 2 is adjusted. It is fixed at the backrest angle position.

  Here, the seat back 2 is normally urged in a forward rotation direction by an urging force of an urging spring (not shown) hooked between the seat back 2 and the seat cushion 3. Therefore, when the vehicle seat 1 is not seated and used, the reclining devices 4 and 4 are released from the locked state, whereby the seat back 2 is pushed forward by the urging force, and the seat cushion 3 is moved upward. Folded.

  At this time, the reclining devices 4 and 4 are normally returned to the locked state by urging by stopping the release operation of the operation lever 5 when the seat back 2 is in an angle region used as a backrest. However, in the rotation angle region of each reclining device 4, 4, there are a lock zone that is returned to the locked state by urging when the release operation is stopped, and a free zone that is not returned to the locked state even if the release operation is stopped. Is set.

  The former lock zone is normally set to an angular region where the seat back 2 is used as a backrest, specifically, an angular region where the seat back 2 is tilted backward from an angular position where the seat back 2 is in an upright posture. The latter free zone is an angle region in a forward tilted posture in which the seat back 2 is not used on its back, specifically, an angular region in which the seat back 2 is tilted forward from an angular position where the seat back 2 is in an upright posture. Is set to

  Accordingly, when the seat back 2 is moved forward, the reclining devices 4 and 4 are released from the locked state, and if the seat back 2 is tilted slightly from the upright position, the release operation is stopped. 2 is naturally pushed forward to the position where it is folded into the upper surface of the seat cushion 3. Hereinafter, the configuration of the reclining devices 4 and 4 will be described in detail. The reclining devices 4 and 4 have a symmetrical configuration with each other, but have substantially the same configuration. Accordingly, in the following, only the configuration of the reclining device 4 on one side shown on the right side of the sheet of FIG.

  As shown in FIG. 1, the reclining device 4 includes a disk-shaped ratchet 10 and a guide 20, a pair of upper and lower poles 30 and 30 and a slide cam 40 disposed between the disk surfaces, A hinge cam 50 for sliding the slide cam 40, a winding spring 60 for urging the hinge cam 50, and the ratchet 10 and the guide 20 are prevented from coming off in the plate thickness direction (axial direction). The holding member 70 is assembled into one unit. Here, the guide 20 corresponds to the connecting member on one side of the present invention, the ratchet 10 corresponds to the connecting member on the other side of the present invention, and the poles 30 and 30 correspond to the locking member of the present invention.

  Specifically, the ratchet 10 is formed with a cylindrical portion 12 and a support portion 15 projecting in a cylindrical shape in the plate thickness direction, which is an assembling direction to the guide 20, at the outer peripheral portion of the disk portion 11. . The cylindrical portion 12 and the support portion 15 are formed by half punching of the ratchet 10 in the plate thickness direction. Accordingly, as shown in FIG. 5, the support portion 15 is formed in a cylindrical shape in which a part of the shape overlaps the cylindrical portion 12 in the plate thickness direction and protrudes in the plate thickness direction from the cylindrical portion 12. Yes.

  The cylindrical portion 12 and the support portion 15 are formed so as to protrude into a cylindrical shape drawn around the rotation center of the ratchet 10. Here, the inner peripheral surface of the cylindrical portion 12 is formed with an inner peripheral tooth surface 12a having internal teeth and a protruding plane 12b having no internal teeth. The projecting plane 12b is formed at two positions that are axially symmetric with the cylindrical portion 12, and each of the projecting planes 12b is a flat curved surface whose inner circumferential surface projects radially inward from the inner circumferential tooth surface 12a. Has been formed.

  As a result, the rotation angle region in the circumferential direction in which the projecting plane 12b does not interfere with any of the poles 30 and 30 is set as a lock zone in which the inner peripheral tooth surface 12a can mesh with each of the poles 30 and 30. Yes. And the rotation angle area | region where the protrusion plane 12b interferes with the poles 30 and 30 and a meshing is prevented is set as a free zone. As shown in FIG. 3, the ratchet 10 is integrally connected to the seat back 2 by being joined to a back frame 2 f forming a skeleton of the seat back 2. Here, the back frame 2f corresponds to one side of the two target members of the present invention.

  Specifically, the back frame 2f is arranged in the board-alignment direction of the support portion 15 so that the ring portion 22 of the guide 20 described later is inserted into the hole of the fitting hole 2a formed through the plate portion. It is assembled as a state in which it is face-matched to the inner board surface which is the end face part of. In this assembled state, the fitting portion between the back frame 2f and the support portion 15 is welded and joined, so that the two are firmly and integrally connected to each other.

  And by this connection, since the back frame 2f acts to increase the axial and radial thickness of the peripheral edge portion of the inner peripheral tooth surface 12a, the strength of the peripheral edge portion of the inner peripheral tooth surface 12a is increased. Therefore, this increase in thickness also increases the locking strength when the outer peripheral tooth surfaces 30a, 30a of the poles 30, 30 described later are engaged with the inner peripheral tooth surface 12a. Next, returning to FIG. 3, a through hole 14 is formed in the center of the disk portion 11 of the ratchet 10 for inserting the operation shaft 4 c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4. Yes. Note that the operation shaft 4c can be inserted through the back frame 2f in the axial direction by forming the fitting hole 2a described above.

  Next, returning to FIG. 1, the configuration of the guide 20 will be described. The guide 20 is formed in a disk shape having an outer diameter slightly smaller than that of the ratchet 10. An annular portion 22 is formed on the outer peripheral edge of the disk portion 21 of the guide 20 so as to project in a cylindrical shape in the plate thickness direction, which is an assembling direction to the ratchet 10. The annular portion 22 is formed by half-cutting the guide 20 in the plate thickness direction.

  As shown in FIG. 5, the annular portion 22 is formed in such a size that it is axially received in the cylinder of the support portion 15 of the ratchet 10 and is gently fitted into the cylinder of the support portion 15. Yes. Therefore, the guide 20 is in a state in which the annular portion 22 is enclosed by the support portion 15 from the outer peripheral side when the annular portion 22 is fitted into the cylinder of the support portion 15 of the ratchet 10 and assembled. Thus, the guide 20 is assembled in a radially supported state so that the guide 20 can slide relative to the ratchet 10 by the fitting structure of the annular portion 22 and the support portion 15. ing.

  Specifically, the annular portion 22 is assembled in a state of facing the cylindrical portion 12 of the ratchet 10 in the axial direction by being fitted into the cylinder of the support portion 15 of the ratchet 10. The inner diameter of the annular portion 22 is set to be larger than the inner diameter of the cylindrical portion 12 of the ratchet 10, and the inner peripheral surface thereof protrudes radially inward from the inner peripheral tooth surface 12 a of the cylindrical portion 12. Thus, the engagement of the poles 30 and 30 to be described later is not hindered. The annular portion 22 is formed so as to protrude into a cylindrical shape drawn around the rotation center of the guide 20.

  By the way, as shown in FIG. 4, the guide 20 described above is integrated with the seat cushion 3 by joining the outer surface of the disk portion 21 to the plate surface of the cushion frame 3 f forming the skeleton of the seat cushion 3. Connected. Here, the cushion frame 3f corresponds to the other side of the two target members of the present invention.

  Here, the disc portion 21 of the guide 20 is formed with a plurality of dowels 24a... And D dowels 24b that protrude in a cylindrical shape from the outer plate surface. These dowels 24a... And D dowels 24b are arranged and formed at equal intervals in the circumferential direction at a position closer to the outer peripheral edge of the disk portion 21. Among these, the D dowel 24b is formed by cutting out a part of the protruding cylindrical shape into a D-shaped cross section, and the shape is distinguished from the dowel 24a. ing.

  On the other hand, dowel holes 3a,... And D dowel holes 3b, through which the above-described dowels 24a, .., and D dowels 24b can be fitted, are formed through the cushion frame 3f. Therefore, by fitting these dowels 24a .. and D dowels 24b into dowel holes 3a .. and D dowel holes 3b formed in the cushion frame 3f, respectively, these fitting portions are welded and joined. The guide 20 is firmly and integrally connected to the cushion frame 3f (see FIG. 5).

  A through hole 25 is formed in the center of the disk portion 21 of the guide 20 for inserting the operation shaft 4c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4. As shown in FIG. 4, a through-hole 3 c having the same purpose is formed in the cushion frame 3 f at a position on the same axis as the through-hole 25. The through hole 3c is formed to have a large shape so that a later-described winding spring 60 can be accommodated in the hole.

  Returning to FIG. 1, a guide groove 23 is formed in the disk portion 21 of the guide 20, the inner plate surface of which is recessed in a “ten” sign shape in the plate thickness direction. The guide groove 23 is formed by half-cutting the disk portion 21 in the plate thickness direction in the shape of a “ten”. Here, the above-mentioned dowels 24a... And D dowels 24b are formed so as to protrude at positions on the outer board surface where the guide grooves 23 are formed. In the guide groove 23, the upper and lower groove portions in the figure are formed as pole grooves 23 a and 23 a that can accommodate respective poles 30 and 30 to be described later.

  As shown in FIG. 6, the pole grooves 23a and 23a are formed in the shape of guide walls 21a and 21b and guide walls 21c and 21d formed as side walls on both the left and right sides thereof. The guide 20 is guided so as to be slid along the shape only in the radially inward side or outward side (the vertical direction in the figure). Further, the right and left sides of the guide groove 23 extending in the lateral direction and the groove portions therebetween are formed as a single slide cam groove 23b in which a slide cam 40 described later can be housed.

  This slide cam groove 23b has a guide wall 21a, 21c and guide walls 21b, 21d formed as side walls on both upper and lower sides thereof, so that the slide cam 40 is poled with respect to the guide 20 along the groove shape. 30 and 30 are guided so as to be slid only in the horizontal direction in the figure perpendicular to the sliding direction. Returning to FIG. 1, the disk portion 21 of the guide 20 is formed with spring hook portions 26, 26 protruding in a pin shape from the outer plate surface. These spring hook portions 26 and 26 are functional parts for hooking an outer end 62 of a winding spring 60 described later, and are formed at two locations in the circumferential direction so that the hook positions can be selected. Yes.

  Next, the configuration of the poles 30 and 30 will be described. These poles 30 and 30 are formed in a frame shape that can be accommodated in the respective pole grooves 23a and 23a formed in the guide 20 described above. These poles 30 and 30 are formed in a vertically symmetrical shape. Specifically, each of the poles 30 and 30 is formed in an arcuate shape whose outer peripheral edge matches the inner peripheral surface of the cylindrical portion 12 of the ratchet 10 described above. And the outer peripheral tooth surfaces 30a and 30a which have the external tooth which can be meshed | engaged with the inner peripheral tooth surface 12a formed in the inner peripheral surface of the cylindrical part 12 are formed in the outer peripheral surface curved in this circular arc shape.

  Accordingly, as shown in FIG. 6, each of the pawls 30, 30 is pressed by a slide cam 40 described later and is slid radially outward, so that the outer peripheral tooth surfaces 30 a, 30 a It is pressed against the inner peripheral tooth surface 12a and meshes. Thereby, each pole 30 and 30 and the ratchet 10 will be in an integrated state in the circumferential direction by mutual meshing force. However, the poles 30 and 30 can be slid only inward and outward in the radial direction by the guides by the guide walls 21a and 21c and the guide walls 21b and 21d.

  Therefore, the ratchet 10 is in a state in which the rotational movement with respect to the guide 20 is restricted via the poles 30 and 30. As a result, the reclining device 4 is rotationally locked. The rotation lock state of the reclining device 4 is released when the poles 30 and 30 are pulled inward in the radial direction and removed from the meshed state with the ratchet 10, as shown in FIG.

  Here, the operation of sliding the poles 30 and 30 inward and outward in the radial direction is performed by a sliding operation of a slide cam 40 disposed between the poles 30 and 30. As shown in FIG. 1, the slide cam 40 is formed in a frame shape that can be accommodated in the slide cam groove 23b formed in the guide 20 described above. The slide cam 40 is formed in a vertically symmetric shape, and shoulders 42 and 42 for pushing the poles 30 and 30 outward in the radial direction are formed on the upper and lower edges of the slide cam 40 and the poles 30. , 30 are formed on the inner side in the radial direction.

  Here, the above-described poles 30 and 30 are formed in a gate shape in which the shape on the radially inner side is partially cut out. The poles 30, 30 are brought into contact with the surface portions of the upper and lower edges of the slide cam 40 by contacting the leg portions 32, 32 forming both gate-shaped legs, respectively. Is pressed. Specifically, as shown in FIG. 6, the pawls 30, 30 are configured so that the leg portions 32, 32 are the shoulder portions of the slide cam 40 when the slide cam 40 is slid to the right side in the drawing. 42 and 42 are pushed out radially outward.

  As a result, the poles 30 and 30 are held in a state where their outer peripheral tooth surfaces 30 a and 30 a are engaged with the inner peripheral tooth surface 12 a of the ratchet 10. Then, as shown in FIG. 7, each pole 30, 30 is slid to each hanging portion 31, 31 formed on the inner side of the portal shape by sliding the slide cam 40 to the left side in the figure. The hooks 44 of the cam 40 are hooked and pulled inward in the radial direction. Thereby, each pole 30 and 30 is made to draw each leg part 32 and 32 into the inside of the groove parts 43 and 43 formed in those illustration right side positions from each shoulder part 42 and 42 of the slide cam 40, The meshed state with the ratchet 10 is removed.

  Here, each groove part 43 and 43 is formed in the shape dented from each shoulder part 42 and 42 smoothly. As a result, as shown in FIG. 6, the pawls 30, 30 are slid to the right side in the drawing, so that their leg portions 32, 32 are inclined surfaces of the groove portions 43, 43. Are moved and guided along the shoulders 42, 42. Here, the operation of sliding the slide cam 40 in the left-right direction in the drawing is performed by the rotation operation of the hinge cam 50 assembled in the cam hole 41 penetratingly formed in the center portion of the slide cam 40.

  As shown in FIG. 1, the hinge cam 50 is rotatably assembled in a cam hole 41 formed through the center of the slide cam 40. The hinge cam 50 is normally urged to rotate counterclockwise as shown in FIG. 1 by the urging force of the winding spring 60 hooked between the hinge cam 50 and the guide 20. Here, as shown in FIG. 4, the winding spring 60 has its inner end 61 hooked on the spring hooking portion 51 of the hinge cam 50 as a pre-twisted state, and the outer end 62 is the spring of the guide 20. It is hooked on the hook portion 26.

  Accordingly, as shown in FIG. 6, the hinge cam 50 is normally pressed on the right side in the drawing by pressing the slide cam 40 from the inner peripheral surface side of the cam hole 41 by the operation protrusion 52 formed to protrude on the outer peripheral portion thereof. To slide. As a result, the poles 30 and 30 are normally held in a state of meshing with the ratchet 10 with the leg portions 32 and 32 riding on the shoulder portions 42 and 42 of the slide cam 40.

  The hinge cam 50 is integrally connected to the operation shaft 4c described above with reference to FIG. As a result, the hinge cam 50 is rotated in the clockwise direction against the urging force of the winding spring 60 shown in FIG. 1 as the operating lever 5 (see FIG. 2) is pulled up. . That is, the hinge cam 50 is rotated in the counterclockwise direction shown in FIG. 6 by the above-described operation. As a result, as shown in FIG. 7, the slide cam 40 is slid to the left side in the drawing, and the poles 30 and 30 are released from the meshed state with the ratchet 10.

  Next, returning to FIG. 1, the holding member 70 will be described. The holding member 70 is formed by punching a thin steel plate into a ring shape. As shown in FIG. 5, the holding member 70 is integrally formed by welding the outer peripheral edge portion to the above-described back frame 2 f in a state where the disk portion 21 of the guide 20 is inserted into the ring-shaped hole. It is connected to. Accordingly, the holding member 70 is integrally connected to the back frame 2f integrally connected to the ratchet 10 in a state where the surface is applied to the outer plate surface of the annular portion 22 of the guide 20 in the axial direction. Yes.

  Thus, the ratchet 10 and the guide 20 are held in a state where they are prevented from coming off in the axial direction. Here, the annular portion 22 of the guide 20 is assembled with a slight gap in the axial direction between the cylindrical portion 12 of the ratchet 10 and the holding member 70. Thereby, the rotational movement of the guide 20 with respect to the ratchet 10 can be smoothly performed without being hindered by the sliding friction with the holding member 70.

  Thus, according to the reclining device 4 that is the vehicle seat coupling device of the present embodiment, the back frame 2 f that is integrally coupled to the ratchet 10 has the peripheral edge of the inner peripheral tooth surface 12 a with respect to the ratchet 10. It is assembled so as to increase the thickness in the radial direction or axial direction of the part. Thereby, since the intensity | strength of the peripheral part of the internal peripheral tooth surface 12a is raised, the lock intensity | strength at the time of meshing locking with each pole 30 and 30 is also raised. Thus, the lock strength can be increased without increasing the size of the reclining device 4. Further, the back frame 2 f is integrally connected to an end portion of the ratchet 10 in the board alignment direction. Therefore, by integrally connecting the holding member 70 to the back frame 2f, the holding member 70 can be formed as a simple-shaped member that is only applied to the outer board surface of the guide 20 in the axial direction.

  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, as shown in FIG. 8, the holding member (70) shown in the above embodiment is formed into a step shape portion 2 b formed by stepping the back frame 2 f (target member) into a step shape, thereby forming the back frame 2 f. You may shape | mold. That is, the holding member 70 shown in the above embodiment is simply integrated with the back frame 2f (target member), so that the outer plate surface of the guide 20 (one side connecting member) is simply applied in the axial direction. Since the configuration is a shape, the holding member 70 can be simply formed on the back frame 2f as the stepped shape portion 2b. Thereby, the number of parts can be reduced and the configuration can be simplified.

  Moreover, in the said Example, what applied the connecting apparatus of the vehicle seat of this invention as the reclining apparatus 4 which connects the seat back 2 with respect to the seat cushion 3 so that backrest angle adjustment is possible was shown. However, this connecting device can also be applied to applications in which the seat back 2 is connected to the vehicle floor so that the backrest angle can be adjusted. Further, the connecting device can be applied to an application for connecting the seat body so as to be rotated in the turning direction with respect to the vehicle body floor. Further, the connecting device can be applied to an application in which a so-called ottoman device that lifts and supports the lower leg of a seated person from below is connected to the seat cushion 3 or the vehicle body floor so as to be able to be turned upside down.

1 is an exploded perspective view of a reclining device according to Embodiment 1. FIG. It is a perspective view showing the schematic structure of the vehicle seat. It is a perspective view showing the assembly structure of a reclining device. It is a perspective view showing the assembly structure of a reclining device. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. 3 showing the locked state of the reclining apparatus. It is sectional drawing showing the state which unlocked the reclining apparatus. It is the block diagram which showed the modification Example of the reclining apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2f Back frame (one side of two object members)
2a Fitting hole 2b Stepped shape portion 3 Seat cushion 3f Cushion frame (the other side of the two target members)
3a Dowel hole 3b D Dowel hole 3c Through hole 4 Reclining device (vehicle seat coupling device)
4c Operation shaft 4r Connection rod 5 Operation lever 10 Ratchet (connection member on the other side)
DESCRIPTION OF SYMBOLS 11 Disk part 12 Cylindrical part 12a Inner peripheral tooth surface 12b Projection plane 14 Through-hole 15 Support part 20 Guide (one side connection member)
21 disk part 21a-21d guide wall 22 ring part 23 guide groove 23a pole groove 23b slide cam groove 24a dowel 24b D dowel 25 through hole 26 spring hook part 30 pole (locking member)
30a Peripheral tooth surface 31 Hanging part 32 Leg part 40 Slide cam 41 Cam hole 42 Shoulder part 43 Groove part 44 Hook 50 Hinge cam 51 Spring hook part 52 Operation protrusion 60 Winding spring 61 Inner end 62 Outer end 70 Holding member

Claims (2)

A vehicle seat coupling device that couples two target members such that they can rotate relative to each other,
Two connecting members each having a disk-like portion integrally connected to one side or the other side of the two target members and assembled to each other so as to be rotatable relative to each other;
The outer peripheral tooth surface is arranged between the two connecting members and is assembled to the one connecting member and supported in the circumferential direction on the inner peripheral tooth surface formed on the other connecting member. A locking member that can lock the relative rotation between the two connecting members by meshing,
A holding member assembled to prevent the two connecting members from coming off in the axial direction;
The connecting member on the other side is formed with a support portion for receiving the connecting member on the one side in the axial direction so that the two connecting members support each other in the radial direction, and is integrally connected to the connecting member on the other side. The target member is integrally connected to the end portion of the other side connecting member in the disc alignment direction so as to increase the radial or axial thickness of the inner peripheral tooth surface. The holding member is integrally connected to a target member that is axially applied to an outer surface of the one side connecting member and connected to the other side connecting member. Connecting device. The vehicle seat coupling device according to claim 1,
An inner peripheral tooth surface formed on the other side connecting member is formed on an inner peripheral surface of a cylindrical portion formed to protrude cylindrically in the axial direction on the other side connecting member, and the support portion is A target member that is formed so as to protrude in a cylindrical shape in the axial direction further from the outer peripheral portion of the cylindrical portion, and the target member connected to the other side connecting member is an end surface portion in the disc alignment direction that is an end portion in the axial direction of the support portion A vehicle seat coupling device, wherein the vehicle seat coupling device is integrally coupled to the support portion in a state of being mated with each other.

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