JP5540532B2 - Vehicle seat coupling device - Google Patents

Description

  The present invention relates to a connecting device for a vehicle seat. More specifically, the present invention relates to a vehicle seat connecting device for connecting two target members to be connected to each other so as to be relatively rotatable.

  2. Description of the Related Art Conventionally, in a vehicle seat, a seat back is connected to a seat cushion via a reclining device, and an operation for adjusting a backrest angle is known. As a configuration of such a reclining device, for example, 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 are mutually connected. What is constructed by being assembled in the axial direction so as to be supported so as to be relatively rotatable is known.

  Specifically, the outer peripheral portion of the ratchet described above and the outer peripheral portion of the guide are formed with cylindrical portions that protrude in a cylindrical shape in the opposite directions, and these cylindrical portions are fitted in and out of each other. As a result of being assembled together, they are assembled in a state of supporting each other so that they can rotate relative to each other. Here, the following Patent Document 1 discloses a configuration in which, in the configuration of the reclining device described above, the cylindrical portion of the guide that constitutes the cylindrical portion on the outer peripheral side is cut off, and the entire reclining device is reduced in size. Yes.

  In this disclosure, instead of the cylindrical portion of the guide being cut away, a thin cylindrical retaining ring constitutes a support that supports these in a relatively rotatable manner. The retaining ring is assembled across the outer periphery of the ratchet and guide, thereby preventing these axial detachments and encircling these outer peripheral parts so that they can move in the axial deviation direction. It comes to prevent.

JP 2006-204896 A

  However, in the related art disclosed above, the retaining ring is formed by a relatively thin cylindrical member, and a large load that causes a forced off-axis movement between the ratchet and the guide is input. Therefore, it is configured to bend easily.

  The present invention has been devised as a solution to the above-described problem, and the problem to be solved by the present invention is a connection functioning as a rotating shaft device that can be rotationally held like a reclining device for a vehicle seat. An object of the present invention is to increase the supporting strength for preventing the axial displacement between the ratchet and the guide assembled in a state of supporting each other so as to be relatively rotatable without increasing the size of the connecting device.

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 connecting device for connecting two target members to be connected so as to be relatively rotatable with each other, and includes a ratchet, a guide, and a pole. The ratchet and the guide are integrally connected to one side or the other side of the two target members, and are assembled in a state of supporting each other so as to be relatively rotatable. The pawl is placed between the ratchet and the guide, and the inner peripheral tooth formed on the ratchet by being pushed and moved radially outward as it is assembled to the guide and supported in the circumferential direction. The outer peripheral tooth surface is meshed with the surface to lock the relative rotation between the ratchet and the guide. The ratchet is formed with a cylindrical outer cylindrical portion having inner teeth forming inner peripheral tooth surfaces on the inner peripheral surface so as to protrude in the axial direction. Further, an inner cylindrical portion that protrudes in the same axial direction as a concentric circle with the outer cylindrical portion is also formed in the cylindrical portion of the outer cylindrical portion. The guide is formed with a support protrusion protruding in the axial direction so as to support the inner cylindrical portion from the outer peripheral side and support the shaft so as to be relatively rotatable.

  According to the first aspect of the present invention, the ratchet is configured such that the inner cylindrical portion formed on the inner side of the outer cylindrical portion is applied from the outer peripheral side by the support protrusions that are formed to protrude from the guide. It is assembled in a state of supporting each other so as to be capable of relative rotation. In this way, the support structure (support protrusion) that supports the ratchet by applying the ratchet from the outer peripheral side by the guide is supported not by surrounding the outer peripheral edge of the ratchet, but by the outer periphery of the inner cylindrical portion formed on the ratchet. Since the connecting device is not enlarged even if the thickness of the supporting protrusion is secured in the radial direction, the axial displacement between the ratchet and the guide is not increased without increasing the size of the connecting device. The supporting strength for preventing the movement can be increased.

  Next, according to a second aspect, in the first aspect described above, a part of the inner peripheral surface in the circumferential direction of the outer cylindrical portion of the ratchet protrudes inward in the radial direction from the inner peripheral tooth surface. And the smooth protrusion surface without the tooth | gear which does not mesh even if it hits on the outer peripheral tooth surface of a pole is formed.

  According to the second invention, the support protrusion of the guide is supported by being applied from the outer peripheral side to the inner cylindrical portion of the ratchet, and is configured to be supported by being applied from the inner peripheral side to the outer cylindrical portion. Therefore, it is possible to form a protruding surface protruding from the inner peripheral tooth surface on a part of the inner peripheral surface of the outer cylindrical portion. Thereby, in the rotation area where the ratchet and the guide rotate relative to each other, an area where the pole meshes with the inner peripheral tooth surface of the ratchet (lock zone) and an area where the ratchet and the guide do not mesh due to contact with the protruding surface (free zone) are set. be able to.

  Next, according to a third aspect of the present invention, in the first or second aspect described above, the guide has a plurality of guide walls that are applied to the side portions of the pole and support the pole in the circumferential direction in the axial direction. Protrusively formed. The support protrusion is formed so as to further protrude in the axial direction in the formation region of the guide wall.

  According to the third aspect of the present invention, the support protrusion is formed so as to protrude in the axial direction from the guide wall of the guide so that the support protrusion does not interfere with other operating members such as the pole and the operation member for moving the pole. It can be arranged in the form. Further, by forming the support protrusion in such a manner that it further protrudes from the guide wall formed to protrude in the axial direction, the support protrusion can be suppressed to a small amount so that the support strength is not weakened.

1 is an exploded perspective view illustrating a configuration of a reclining device according to a first embodiment. It is a perspective view showing the schematic structure of the vehicle seat. It is the external view which represented the reclining device seeing from the outer-board surface side of a ratchet. It is the external view which represented the reclining device seeing from the outer-board surface side of a guide. It is a disassembled perspective view showing the assembly structure of a ratchet and a back frame. It is a disassembled perspective view showing the assembly structure of a guide and a cushion frame. It is an external view of a reclining apparatus. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG. 7 showing the locked state of the reclining apparatus. It is sectional drawing showing the cancellation | release state of the reclining apparatus. It is sectional drawing showing the free zone area | region of the reclining apparatus.

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

  First, the configuration of the vehicle seat coupling device according to the first embodiment will be described with reference to FIGS. As shown in FIG. 2, the connecting device for a vehicle seat according to the present embodiment is adopted in a vehicle seat 1 disposed as a passenger seat of a right-hand drive vehicle, and a seat back 2 serving as a backrest. The reclining devices 4 and 4 are connected to the seat cushion 3 serving as a seating portion so that the backrest angle can be adjusted.

  Specifically, the reclining devices 4 and 4 are disposed on both side portions of the vehicle seat 1, and the lower end portions of the left and right sides of the seat back 2 and the rear end portions of the left and right sides of the seat cushion 3 are respectively provided. It is configured as a rotary shaft device that can be rotated and connected so as to be rotatable about the same axis. As a result, the seat back 2 can be switched between a state in which the backrest angle with respect to the seat cushion 3 is fixed and a state in which the backrest angle can be adjusted by switching the operating state of the reclining devices 4, 4. It has become.

  Each of the reclining devices 4 and 4 described above is normally held in a state (locked state) in which the backrest angle of the seat back 2 is fixed by urging. Each reclining device 4, 4 is operated to release the locked state all at once by pulling up the operation lever 5 provided on the right side (left side as viewed from the seated occupant) of the seat cushion 3. It has come to be. Further, each reclining device 4, 4 is returned to the locked operation state by urging by stopping the operation of pulling up the operation lever 5 described above.

  In detail, the operation shafts 4c and 4c for performing the switching operation between the locking and unlocking of the reclining devices 4 and 4 are inserted into the central portions of the reclining devices 4 and 4 described above. These operation shafts 4c and 4c are integrally connected to each other by a rod 4r provided between them, and the operation shaft 4c on the right side in the drawing is rotated by a pulling operation of the operation lever 5. As a result, the shafts are integrally rotated with each other.

  Here, each reclining device 4 and 4 is always kept in the operation state locked by urging. The reclining devices 4 and 4 are operated so that the operation shafts 4c and 4c are simultaneously rotated by the pulling-up operation of the operation lever 5 described above, so that their locked states are simultaneously released. It has become. As a result, the fixed state of the backrest angle of the seat back 2 is released, so that the seat back 2 can be adjusted for the backrest angle.

  Then, by adjusting the backrest angle of the seat back 2 to a desired angle position and stopping the release operation of the operation lever 5, the reclining devices 4, 4 are again returned to the locked state by urging, and the seat back 2 Is fixed at the adjusted backrest angle position. Here, the seat back 2 is normally urged in a direction to rotate forward by an urging force of an urging spring (not shown) hooked between the seat back 2 and the seat cushion 3.

  As a result, the seatback 2 is operated in the forward-turning direction by urging by being released from the locked state of the reclining devices 4 and 4 as described above, and is folded into the upper surface portion of the seat cushion 3. It is like that. Here, each of the reclining devices 4 and 4 described above is normally in an operation state in which the operation is locked by urging by stopping the release operation of the operation lever 5 when the seat back 2 is in a rotation angle region used as a backrest. It is supposed to be returned to.

  However, in the rotational angle region of each reclining device 4, 4, the angle region of the lock zone that is returned to the locked state by urging by stopping the release operation of the operation lever 5, and the locked state even if the release operation is stopped. Is set to a free zone angle region that is not returned. The former lock zone is usually a rotation angle region where the seat back 2 is used as a backrest, specifically, a rotation angle region between a position where the seat back 2 is in an upright position and a position where the seat back 2 is in a tilted position. Is set to

  The latter free zone is a rotation angle region of the forward tilt where the seat back 2 is not used as a backrest, specifically, a position where the seat back 2 is in an upright posture and a position where the seat back 2 is in a forward tilted posture. The rotation angle region between is set. As a result, when the seat back 2 is moved forward, the locked state of each reclining device 4, 4 is released, and if the seat back 2 is tilted slightly from the upright posture, the release operation is stopped. The seat back 2 is naturally moved forward to the position where it is folded into the upper surface of the seat cushion 3.

  Hereinafter, the configuration of each of the reclining devices 4 and 4 will be described in detail. In addition, each reclining apparatus 4 and 4 becomes a mutually symmetrical structure, and has the substantially same structure. Therefore, in the following, only the configuration of the inner side reclining device 4 shown on the left side in FIG.

  Here, FIG. 1 shows an exploded perspective view of the reclining device 4. The reclining device 4 includes a ratchet 10, a guide 20, three poles 30... (... represents a plurality), a rotating cam 40, a hinge cam 50, a spiral spring 60, and a retaining ring 70. These are assembled into one unit.

  Specifically, the ratchet 10 is formed in a disc shape, and an outer cylindrical portion that protrudes in a cylindrical shape in a plate thickness direction (axial direction) that is an assembling direction to the guide 20 on the outer peripheral edge portion of the disc portion 11. 12 is formed. The outer cylindrical portion 12 is formed by being extruded in a cylindrical shape in the axial direction of the ratchet 10 when the outer peripheral edge of the disk portion 11 is half-cut in the plate thickness direction.

  The inner peripheral surface of the outer cylindrical portion 12 has an inner peripheral tooth surface 12a having inner teeth capable of meshing with outer peripheral tooth surfaces 30a of each pole 30 described later, and the inner peripheral teeth. A curved protruding surface 12b having no internal teeth and protruding inward in the radial direction from the surface 12a is formed side by side in the circumferential direction. Here, as shown in FIG. 9, when the protruding surface 12 b is arranged at a circumferential position that does not interfere with any of the poles 30..., Each of the poles 30. Is allowed to move outwardly in the radial direction.

  Therefore, the rotation angle region in the circumferential direction in which the protrusion surface 12b and the pole 30... Do not interfere with each other is a lock zone LO in which the engagement between the respective poles 30 and the inner peripheral tooth surface 12a of the ratchet 10 is allowed. Set as However, as shown in FIG. 11, the projecting surface 12b is disposed at a circumferential position where any one of the poles 30 is moved, so that the poles 30 can be ridden and radially outward. It is designed to prevent movement to the side.

  Thereby, although the details will be described later, the rotational operation of the rotary cam 40 for pushing out each pole 30... To the radially outward side is also stopped, and the other two poles 30, 30 are radially outward. Therefore, the movement in the meshing lock direction is also prevented. In this state, the pole 30 riding on the projecting surface 12b is merely pressed against the projecting surface 12b, so that the ratchet 10 can rotate with respect to the guide 20, that is, the unwinding state. Keep locked.

  Therefore, the rotation angle region in the circumferential direction where the projecting surface 12b and any one of the poles 30 interfere with each other, the meshing between the poles 30 and the inner peripheral tooth surface 12a of the ratchet 10 is prevented, and the reclining device 4 Is set as a free zone FR that is kept unlocked.

  Next, returning to FIG. 1, the central portion of the disk portion 11 of the ratchet 10 has a cylindrical shape that protrudes in the same axial direction concentrically with the outer cylindrical portion 12 in the cylinder of the outer cylindrical portion 12 described above. An inner cylindrical portion 13 is formed. By forming the inner cylindrical portion 13, a cylindrical dowel cylindrical portion 14 protruding to the outer plate surface side is formed between the outer cylindrical portion 12 and the inner cylindrical portion 13 of the disk portion 11 (see FIG. 3, see FIGS. 5 and 8).

  As shown in FIG. 8, the dowel cylindrical portion 14 functions as a joining portion that is joined to the plate surface of the back frame 2 f that forms the skeleton of the seat back 2. Specifically, the dowel cylindrical portion 14 is fitted into a round-shaped fitting hole 2a formed through the back frame 2f and welded to the peripheral portion of the fitting hole 2a. 2f is firmly and integrally joined. Here, the back frame 2f corresponds to a target member on one side to be connected in the present invention.

  Here, in the central portion of the disk portion 11 of the ratchet 10, a through-hole 15 is formed through which the operation shaft 4c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4 is inserted in the axial direction. Has been.

  Next, returning to FIG. 1, the configuration of the guide 20 will be described. As shown in FIG. 1, the guide 20 is substantially the same size as the ratchet 10, but is formed in a disk shape having a slightly larger outer diameter than the ratchet 10. The guide 20 is assembled in the state of supporting the ratchet 10 so as to be relatively rotatable with each other by being assembled in the axial direction so as to overlap the ratchet 10 and the disk surface.

  More specifically, the disc portion 21 of the guide 20 has four guides protruding in the axial direction toward the disc portion 11 of the ratchet 10 at four positions in the circumferential direction of the disc portion 21. Walls 21a to 21d are formed. Arc-shaped support protrusions 22a to 22d are formed at positions on the guide walls 21a to 21d so as to protrude further in the axial direction than the guide walls 21a to 21d. The configuration of the guide walls 21a to 21d will be described in detail later.

  Each of the support protrusions 22a to 22d described above is formed in a size that allows the inner cylindrical portion 13 of the ratchet 10 described above to be applied from the outer peripheral surface side by the curved inner peripheral surface shape. . As a result, the ratchet 10 is assembled to the guide 20, whereby the inner cylindrical portion 13 of the ratchet 10 is received in the space surrounded by the support protrusions 22 a to 22 d, and from the outer peripheral side by the support protrusions 22 a to 22 d. It is assembled in a state of being supported so as to be relatively rotatable.

  Specifically, as shown in FIG. 9, each of the support protrusions 22 a to 22 d is assembled with a slight gap in the radial direction between the support cylindrical portion 13 and the inner cylindrical portion 13 of the ratchet 10. The movement is received and supported by the curved inner peripheral surface. Here, each guide wall 21a-21d mentioned above is formed with the fixed width | variety in a radial direction on the function formed in order to support each pole 30 ... mentioned later with high support strength. .

  Accordingly, each of the support protrusions 22a to 22d has a large radial formation space on each of the guide walls 21a to 21d, and is formed in a thick shape having a necessary width in the radial direction. . Thus, the inner cylindrical portion 13 of the ratchet 10 is supported by the support protrusions 22a to 22d so as to be able to smoothly rotate and move with respect to the guide 20 so as to prevent the off-axis movement with high support strength. It is supposed to be.

  By the way, as shown in FIG. 6, the guide 20 described above is integrated with the seat cushion 3 by joining the outer surface of the disk portion 21 to the surface of the cushion frame 3 f forming the skeleton of the seat cushion 3. It is connected to. Here, the cushion frame 3f corresponds to a target member on the other side that is a connection target of the present invention.

  Specifically, three dowels 24a... Projecting in a cylindrical shape from the outer surface of the disk portion 21 of the guide 20 are formed. These dowels 24a,... Are formed so as to protrude in a cylindrical shape from the back surface side (outer surface side) of each pole groove 23a formed on the disk portion 21 of the guide 20, which will be described later. They are arranged and formed at intervals of 90 degrees at positions relatively close to the outer peripheral edge.

  On the other hand, dowel holes 3a, through which the above-described dowels 24a, .. can be fitted are formed through the cushion frame 3f. Therefore, the guide 20 is firmly attached to the cushion frame 3f by fitting these dowels 24a... Into the dowel holes 3a formed in the cushion frame 3f and welding the fitting portions. (See FIG. 8).

  Here, a through hole 25 for inserting the operation shaft 4c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4 described above is formed in the central portion of the disk portion 21 of the guide 20. A through hole 3c having the same purpose of insertion is formed in the cushion frame 3f at a position coaxial with the through hole 25. The through-hole 3c is formed in a shape that is greatly opened so that a spiral spring 60 described later can be accommodated in the inside of the hole shape.

  Returning to FIG. 1, the disk portion 21 of the guide 20 is formed with a guide groove 23 having a shape in which the inner plate surface 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. The above-described dowels 24a are formed so as to protrude from the back side of the portion where the guide groove 23 is formed.

  The guide groove 23 is formed as a pole groove 23a... That can accommodate each of the poles 30 to be described later, with three grooves extending to the lower side and the left and right sides of the guide groove 23, respectively. ing. And the groove part formed in the center part of the guide groove 23 is formed as the rotation cam groove 23e which can accommodate the rotation cam 40 mentioned later inside. The rotating cam groove 23e is formed in a size that allows the rotating cam 40 to rotate within the groove.

  And the support part 27 which protrudes in the inner disk surface side of the disk part 21 is formed in the groove part extended on the illustration upper side. As shown in FIG. 9, the support portion 27 has an inner peripheral surface formed in a curved shape capable of making a pressing contact with a pressing portion 44 formed on an outer peripheral portion of the rotating cam 40 described later. It functions as a presser that receives the force that is pressed outward from the pressing portion 44 in the radial direction.

  Here, referring back 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 two positions on the outer plate surface. These spring hook portions 26 and 26 are functional parts for hooking an outer end 62 of a spiral spring 60 described later, and are formed at two positions in the circumferential direction so that the hook positions can be selected. Has been.

  Next, the configuration of each of the three poles 30 will be described. These poles 30... Are set in the respective pole grooves 23 a formed in the guide 20, so that they move only inward and outward in the radial direction along the shape of each pole groove 23 a. It is designed to be supported as possible. Specifically, each pole 30 is set in each pole groove 23a..., So that both side portions are applied by guide walls 21a to 21d formed in a standing wall shape on both sides of these pole grooves 23a. It is broken and supported in the circumferential direction.

  By the way, each of the poles 30... Has a curved outer peripheral surface 30 a with an outer tooth whose outer peripheral surface on the radially outer side can mesh with the inner peripheral tooth surface 12 a of the ratchet 10 described above.・ It is formed as As a result, as shown in FIG. 9, each pole 30... Is pushed out from the radially inner side to the outer side by a rotating cam 40, which will be described later, thereby ratcheting the outer peripheral tooth surfaces 30a. 10 inner peripheral tooth surfaces 12a.

  As a result, each pole 30... Is held in a state of being pressed and meshed with the inner peripheral tooth surface 12 a of the ratchet 10 by the force pushed out by the rotating cam 40, and is rotated in the rotational direction (circular circle). (Circumferential direction) and the radial direction are held in an integrated state. However, in the relationship with the guide 20, each pole 30... Slides only inward and outward in the radial direction by the circumferential support by the guide walls 21 a to 21 d applied to both sides thereof. Can not be.

  As a result, the ratchet 10 is in a state in which the rotational movement with respect to the guide 20 is locked via each of the pawls 30... In the meshed state, and the reclining device 4 is in a rotationally locked state. The rotation lock state of the reclining device 4 is such that the rotation cam 40 is rotated counterclockwise in the direction from the state of FIG. 9 to the state of FIG. 10 so that the poles 30. It is released by being pulled out and released from the meshed state with the ratchet 10.

  Here, the operations of pushing each of the above-described poles 30... To the outer side in the radial direction by the rotating operation of the rotating cam 40 and pulling them inwardly are performed on the shoulder formed on the outer peripheral edge of the rotating cam 40. This is performed by the part 42... And the arm part 43. Specifically, the shoulder portions 42... And the arm portions 43... Are formed in a shape protruding from the outer peripheral portion at a plurality of locations in the circumferential direction of the outer peripheral portion of the rotating cam 40.

  These shoulder portions 42... And arm portions 43... Are formed on the leg portions of the poles 30... By the movement of the rotating cam 40 rotated clockwise from the state shown in FIG. 32... Are pushed out from the radially inward side to the outward side. Here, each arm portion 43 is formed to extend the arm from the outer peripheral edge of the rotating cam 40 in the counterclockwise direction shown in the figure, and the rotating cam 40 changes from the state of FIG. 9 to the state of FIG. When rotating in the counterclockwise direction shown in the figure, the poles 30 are hooked on hooks 31 formed in the recesses of the inner peripheral portions of the poles 30 to make the poles 30 It is designed to be pulled inwardly.

  By the way, as shown in FIG. 9, each pole 30... Is pressed by the rotating cam 40 and pressed and held in a state of being engaged with the inner peripheral tooth surface 12 a of the ratchet 10. The reaction force is applied. This reaction force acts as a force for pressing the rotary cam 40 upward in the figure by arranging the above-described poles 30... Asymmetrically in the circumferential direction. However, this reaction force is received by the support portion 27 formed on the guide 20 by the pressing portion 44 formed on the outer peripheral edge portion of the rotating cam 40 on the upper side in the figure.

  As a result, the reaction force received when the rotating cam 40 presses each pole 30... Against the inner peripheral tooth surface 12 a of the ratchet 10 is in a balanced state, so that each pole 30. Thus, the reclining device 4 can be locked with high locking strength by pressing against the inner peripheral tooth surface 12a of the ratchet 10.

  By the way, as shown in FIG. 9, the rotating cam 40 having the above configuration is normally rotated and biased clockwise through a hinge cam 50 mounted at the center thereof. The outer peripheral tooth surface 30a is pressed against the inner peripheral tooth surface 12a of the ratchet 10 and held in a engaged state. Then, as shown in FIG. 10, the rotating cam 40 is pushed and rotated in the same direction by the movement in which the hinge cam 50 is rotated counterclockwise as shown in FIG. 43... Is pulled out inward in the radial direction by the poles 30... So as to be disengaged from the meshed state with the ratchet 10.

  Next, the configuration of the hinge cam 50 that performs the rotation operation of the rotary cam 40 will be described. The hinge cam 50 is inserted through the through hole 41 formed through the central portion of the rotating cam 40 and the through hole 25 formed through the central portion of the guide 20 described above. Specifically, the hinge cam 50 has an operation protrusion 52 that protrudes in a key shape on a part of the outer peripheral portion thereof, and the operation protrusion 52 is formed in a part of the through hole 41 of the rotating cam 40 in a key groove shape. By being set in the operation hole 41a, the rotary cam 40 can be rotated following the rotation.

  The above-described hinge cam 50 is normally urged to rotate counterclockwise toward the paper surface of FIG. 1 and clockwise toward the paper surface of FIG. In this state, a rotational biasing force in the same direction is applied to the rotary cam 40 described above. Here, as shown in FIG. 4, the spiral spring 60 is in a state of being twisted in advance, and its inner end 61 is hooked on the spring hooking portion 51 of the hinge cam 50, and the outer end 62 is hooked on the spring of the guide 20. It is hung on the part 26.

  The operation shaft 4c described above with reference to FIG. 2 is inserted into the hinge cam 50 in the axial direction so as to be integrated with each other in the rotational direction. Thereby, as shown in FIG. 10, the hinge cam 50 is counterclockwise as shown in FIG. 10 against the urging of the spiral spring 60 as the operating shaft 4c is rotated by pulling up the operating lever 5 (see FIG. 2). It is designed to be rotated.

  Next, returning to FIG. 1, the retaining ring 70 will be described. The holding ring 70 functions as a holding member for holding the ratchet 10 and the guide 20 described above assembled in the thickness direction. Specifically, the holding ring 70 is a flange having a surface directed in the axial direction at one end on the right back side in the drawing by punching a thin steel plate into a ring shape and bending the outer peripheral portion thereof in the axial direction. It is formed in a cylindrical shape having a seat surface portion 71 having a shape.

  The retaining ring 70 is arranged inside the cylinder so that the seating surface 71 is applied to the outer surface of the outer cylindrical portion 12 of the ratchet 10 with respect to the ratchet 10 and the guide 20 assembled to each other. 7 and 8, as shown in FIGS. 7 and 8, the outer peripheral portions of the ratchet 10 and the guide 20 are straddled and set so as to surround these outer peripheral portions. .

  Then, after the retaining ring 70 is assembled as described above, the cylindrical portion where the outer peripheral edge of the guide 20 abuts is joined to the outer peripheral edge of the guide 20 by laser welding. They are integrally connected to each other. Accordingly, the holding ring 70 is held by the seat surface portion 71 so that the ratchet 10 is not detached from the guide 20. The retaining ring 70 is integrally joined to the guide 20 to be assembled with a slight gap between the seat surface portion 71 and the outer plate surface of the outer cylindrical portion 12 of the ratchet 10. It is done. Thereby, the rotational movement with respect to the guide 20 of the ratchet 10 can be performed smoothly.

  Thus, according to the vehicle seat coupling device (reclining device 4) of the present embodiment, the ratchet 10 has the inner cylindrical portion 13 formed on the inner side of the outer cylindrical portion 12 protruding from the guide 20. By being applied from the outer peripheral side by the supporting protrusions 22a to 22d, the guide 20 is assembled in a state of supporting each other so as to be relatively rotatable. As described above, the support structure (support protrusions 22a to 22d) for supporting the ratchet 10 by supporting the ratchet 10 from the outer periphery side is supported by surrounding the outer peripheral edge portion of the ratchet 10 instead of being supported. By adopting a configuration in which the outer periphery of the inner cylindrical portion 13 is applied and supported, the guide 20 (the reclining device 4) is not enlarged even if the radial thickness of the support protrusions 22a to 22d is secured. Without increasing the size of the device 4, it is possible to increase the support strength for preventing the off-axis movement between the ratchet 10 and the guide 20.

  Further, the support protrusions 22a to 22d of the guide 20 are configured to be supported by being applied to the inner cylindrical portion 13 of the ratchet 10 from the outer peripheral side, and are configured to be applied to and supported by the outer cylindrical portion 12 from the inner peripheral side. Therefore, it is possible to form a protruding surface 12b protruding from the inner peripheral tooth surface 12a on a part of the inner peripheral surface of the outer cylindrical portion 12. As a result, the rotation region in which the ratchet 10 and the guide 20 rotate relative to each other hits the region of the lock zone (see FIG. 9) where the pawl 30... Meshes with the inner peripheral tooth surface 12a of the ratchet 10 and the protruding surface 12b. It is possible to set a free zone area (see FIG. 11) that is not meshed with each other.

  Further, the support protrusions 22a to 22d are formed so as to protrude in the axial direction from the guide walls 21a to 21d of the guide 20, so that the support protrusions 22a to 22d can be replaced with other poles 30,. It can be arranged at a position where it does not interfere with the actuating member. Further, by forming the support protrusions 22a to 22d so as to further protrude from the guide walls 21a to 21d formed to protrude in the axial direction, the protrusion amount of the support protrusions 22a to 22d is suppressed to be small so that the support strength is not weakened. Can be formed.

  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, in the above embodiment, the vehicle seat connecting device of the present invention is applied as the reclining device 4 that connects the seat back 2 to the seat cushion 3 so that the backrest angle can be adjusted. However, this connecting device can also be applied to applications in which the tiltable seat back is connected to the vehicle body floor.

  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. In addition, 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 a seat cushion or a vehicle body floor so as to be tiltable and rotatable.

  In addition, the ratchet 10 and the guide 20 shown in the above embodiment are connected to a member on the seat back 2 side (one target member to be connected) on the fixed side such as the seat cushion 3 or the floor. You may connect with a member (target member of the other side used as connection object). Also, the pole 30 .. (locking member) lock / unlock operation is exemplified by a straight slide movement in the radial direction, but with the movement in the circumferential direction The thing of the structure which operate | moves with the other exercise | movement form which is performed may be sufficient.

  The number of poles disposed between the ratchet 10 and the guide 20 may be any number. In the case of a type in which one or two poles are arranged, a slide movement type cam as disclosed in JP-A-2002-360368 is used instead of the rotary cam 40 shown in the above embodiment. Can also be applied. In the above embodiment, the poles 30... Are directly drawn inward in the radial direction by the arm portions 43... Of the rotating cam 40. As disclosed in Japanese Laid-Open Patent Publication No. H10, the rotating cam 40 is mounted with an operating plate that engages with each pole and can pull each pole inward in the radial direction as the rotating cam 40 rotates. It may be what.

  In addition, the ratchet 10 and the guide 20 shown in each of the above embodiments are both formed in a disk shape, but for example, an extended portion extending from the disk shape in the radial direction or the axial direction, It may be formed in a shape having an extension portion that is connected to a frame member (target member) of a seat back or a seat cushion.

  Moreover, although the support protrusion 22a-22d of the guide 20 which supports the inner cylindrical part 13 of the ratchet 10 from the outer peripheral side is disposed and formed on the guide walls 21a-21d of the guide 20, the support protrusion is illustrated. 22a-22d may be formed in the location removed from guide walls 21a-21d. However, if the support protrusions 22a to 22d are arranged so as to overlap with the movement trajectory of the pole 30... Or the rotating cam 40, these operations will be hindered, so that the support protrusions 22a to 22d do not interfere with these. Need to be placed.

  Further, the shape of each of the support protrusions 22a to 22d is not limited to the arc shape as shown in the above embodiment, and the shape of the support protrusions 22a to 22d is a straight plate shape or a round pin shape. Any shape that can support the inner cylindrical portion 13 of the ratchet 10 from the outer peripheral side may be used. Moreover, in the said Example, although the support protrusions 22a-22d showed what was arrange | positioned and formed in four places of the circumferential direction of the guide 20 at equal intervals, supporting the inner cylindrical part 13 of the ratchet 10 from the outer peripheral side. The size, length, and number of arrangements are not particularly limited as long as they can be formed.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2f Back frame (one side target member to be connected)
2a Fitting hole 3 Seat cushion 3f Cushion frame (target member on the other side to be connected)
3a Dowel hole 3c Through hole 4 Reclining device (vehicle seat coupling device)
4c Operation shaft 4r Rod 5 Operation lever 10 Ratchet 11 Disk portion 12 Outer cylindrical portion 12a Inner peripheral tooth surface 12b Projecting surface 13 Inner cylindrical portion 14 Dowel cylindrical portion 15 Through hole 20 Guide 21 Disc portions 21a to 21d Guide walls 22a to 22d Projection 23 Guide groove 23a Pole groove 23e Rotating cam groove 24a Dowel 25 Through hole 26 Spring hook portion 27 Support portion 30 Pole 30a Outer tooth surface 31 Hook portion 32 Leg portion 40 Rotating cam 41 Through hole 41a Operation hole portion 42 Shoulder portion 43 Arm Part 44 Pressing part 50 Hinge cam 51 Spring hook part 52 Operation projection 60 Spiral spring 61 Inner end 62 Outer end 70 Holding ring 71 Seat surface part LO Lock zone FR Free zone

Claims (3)

A vehicle seat coupling device for coupling two target members to be coupled so as to be relatively rotatable with each other,
A ratchet and a guide that are integrally connected to one side or the other side of the two target members, and are assembled in a state of supporting each other in a relatively rotatable manner;
An inner peripheral tooth surface formed on the ratchet by being sandwiched between the ratchet and the guide, being assembled to the guide and being supported in the circumferential direction, and pushed outward in the radial direction. A pawl that meshes the outer peripheral tooth surface to lock the relative rotation between the ratchet and the guide,
The ratchet is formed with a cylindrical outer cylindrical portion having inner teeth forming the inner peripheral tooth surface on the inner peripheral surface so as to protrude in the axial direction, and further on the inner cylindrical portion of the outer cylindrical portion. And an inner cylindrical portion that protrudes smaller than the outer cylindrical portion in the same axial direction as a concentric circle, and a support protrusion that supports the inner cylindrical portion from the outer peripheral side and supports the shaft so as to be relatively rotatable. Is formed so as to protrude in the axial direction, and a dowel cylindrical portion formed to protrude in a cylindrical shape in the axial direction on the outer surface of the ratchet by the formation of the outer cylindrical portion and the inner cylindrical portion is formed on the one side. A connecting device for a vehicle seat, wherein the connecting device is fitted into a target member and coupled. The vehicle seat coupling device according to claim 1,
A part of the inner circumferential surface of the outer cylindrical portion of the ratchet protrudes radially inward from the inner circumferential tooth surface and does not mesh even when applied to the outer circumferential tooth surface of the pole. A connecting device for a vehicle seat, wherein a smooth projecting surface without teeth is formed. The vehicle seat coupling device according to claim 1 or 2,
The guide is formed with a plurality of guide walls projecting in the axial direction so as to be applied to the side of the pole and supporting the pole in the circumferential direction, and the support protrusion is formed in the guide wall forming region. A connecting device for a vehicle seat, wherein the connecting device is formed so as to protrude further in an axial direction.

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