JP2013006545A - Connecting device of vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly weld and install an outer peripheral holding member for preventing slipping-out in the axial direction between two disk members, to and in an outer peripheral part of the disk members.SOLUTION: This connecting device (a reclining device 4) of a vehicle seat includes a disk-like ratchet 10 and a guide 20 installed in a mutually relatively rotatable state, poles 30, ..., for preventing rotation of the disk-like ratchet and the guide, and an outer peripheral ring 70 (the outer peripheral holding member) for preventing slipping-out in the axial direction of the disk-like ratchet and the guide. The outer peripheral ring 70 is constituted of two parts 70A and 70B divided in the circumferential direction, and the respective parts 70A and 70B have respectively a holding surface part 71 applied in the axial direction to an outer peripheral part of the ratchet 10, are curvedly formed in a circular arc shape of gentler curvature than an outer peripheral part 22 of the guide 20, are installed from the outside in the radial direction to the outer peripheral part 22, and are installed by respectively welding an abutting place of respective one points of abutting by a difference in the curvature from this outer peripheral part 22.

Description

  The present invention relates to a connecting device for a vehicle seat. More specifically, the present invention relates to a vehicle seat coupling device having a rotation stopping function that couples two members constituting a vehicle seat to each other in a relatively rotatable state.

  2. Description of the Related Art Conventionally, as a vehicle seat reclining device, one disclosed in Patent Document 1 below is known. As shown in FIG. 1, this reclining device has a disk member connected to a seat back and a disk member connected to a seat cushion, and these disk members are assembled in an axial direction so that they can rotate relative to each other. In this state, the ring-shaped outer periphery holding members mounted between the outer peripheral portions are prevented from being detached from each other in the axial direction. The two disk members move each other by moving a locking member having outer peripheral teeth set on one disk member to the outer side in the radial direction and meshing with the inner peripheral teeth of the other disk member. The relative rotation is locked. The outer periphery holding member is divided into two in the circumferential direction, and is assembled from the outer side in the radial direction so as to straddle between the outer peripheral portions of both disk members, and is attached to the disk member on one side. They are welded and connected.

Japanese Patent No. 4435804

  However, in the prior art described in Patent Document 1, the outer peripheral holding member is set so that the curvature of each of the two divided parts is substantially the same as the curvature of the outer peripheral portion of both disc members to be assembled. When the curvature of each part is finished to be small due to a manufacturing error, a gap is generated between each part and the disk member, and there is a possibility that welding cannot be performed properly. The present invention has been devised as a solution to the above-mentioned problem, and the problem to be solved by the present invention is to provide an outer peripheral holding member for preventing axial disengagement between two disk members. The object is to enable appropriate welding to the outer periphery.

In order to solve the above-mentioned problems, the vehicle seat coupling device of the present invention takes the following means.
1st invention is a connection device of a vehicular seat provided with a rotation stop function which connects two members which constitute a vehicular seat in the state where relative rotation is possible mutually. The vehicle seat coupling device includes two disk members that are assembled in an axial direction so as to be rotatable relative to each other, a lock member that is assembled between the disk members to prevent rotation, and the disk members. And an outer periphery holding member that is assembled between the outer peripheral portions of the two members and prevents these axial detachment. The outer periphery holding member has a holding surface portion that is axially applied to the outer peripheral portion of the disk member on one side, and is assembled to the outer peripheral portion of the disk member on the other side from the outside in the radial direction and integrally coupled by welding. It is set as the structure. The outer periphery holding member is composed of a plurality of parts divided in the circumferential direction. Each part is formed to be curved into an arc shape having a gentler curvature than the outer peripheral portion of the disk member on the other side. In the state where each part is assembled from the outer side in the radial direction to the outer peripheral part of the disk member on the other side, and a contact point at each point that comes into contact with each other due to a difference in curvature from the outer peripheral part is welded. Other portions are bent and assembled so as to be along the outer periphery of the.

  According to the first aspect of the present invention, each part constituting the outer periphery holding member has an arc shape with a gentle curvature, so that each part is assigned to the outer peripheral part of the disk member on the other side from the outside in the radial direction. Thus, each part comes into contact with the outer peripheral portion only at one point due to the difference in curvature. Since this contact location can be obtained at the target point due to the difference in curvature, each part can be appropriately joined and assembled to the disk member on the other side by welding this contact location. it can.

  According to a second invention, in the first invention described above, each of the parts of the outer periphery holding member is set such that the combined total length is longer than the peripheral length of the outer peripheral portion of the disk member on the other side. The shape of the ends that are mated with each other is shifted in the axial direction so that the overlap in the circumferential direction of each other is released, so that the difference in circumference with respect to the outer circumference of the disk member on the other side can be absorbed The structure is provided with a relief structure.

  According to the second aspect of the present invention, even if the total perimeter of each part of the outer periphery holding member is set to be longer than the perimeter of the outer peripheral portion of the other disk member to be assembled, Each part can be assembled without overlapping. Therefore, each part of the outer periphery holding member can be more widely applied to the outer periphery of the disk member on the other side and appropriately joined and assembled.

  According to a third aspect of the present invention, in the first or second aspect described above, the parts of the outer periphery holding member are integrally joined together by welding the end portions of the outer periphery holding members together with the outer peripheral portion of the disk member on the other side. It is what.

  According to the third aspect of the invention, by welding the joined ends of each part together with the outer peripheral part of the other disk member and integrally joining them, each part is attached to the other disk member. It can be firmly and appropriately joined and assembled.

1 is an exploded perspective view illustrating a configuration of a reclining device according to a first embodiment. 1 is an external perspective view of a vehicle seat. It is a perspective view showing the connection structure of a seat back frame and a reclining device. It is a perspective view showing the connection structure of a seat cushion frame and a reclining device. It is the VV sectional view taken on the line of FIG. 3 showing the locked state of the reclining apparatus. It is sectional drawing showing the unlocked state of the reclining apparatus. It is the VII-VII sectional view taken on the line of FIG. It is a front view showing the 1st process of attaching an outer periphery ring to a guide. It is a front view showing the 2nd process of attaching an outer periphery ring to a guide. FIG. 10 is a top view showing the shape of the joint of the outer ring in FIG. 9.

  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 this embodiment is a reclining device 4 or 4 that connects the seat back 2 of the vehicle seat 1 to the seat cushion 3 so that the backrest angle can be adjusted. It is configured. Specifically, the reclining devices 4 and 4 include lower ends of the left and right sides of the seat back frame 2f forming the skeleton of the seat back 2, and rear end portions of both the left and right sides of the seat cushion frame 3f forming the skeleton of the seat cushion 3. And each side portion of the seat back frame 2f can be rotated relative to each side portion of the seat cushion frame 3f coaxially with each other. It is linked to. Thus, the seat back 2 is connected to the seat cushion 3 so as to be tiltable and rotatable in the seat front-rear direction. Each of the reclining devices 4 and 4 can be switched so that the rotational movement is allowed or locked by a rotation stop structure (lock structure) provided therein. Yes. Here, the seat back frame 2f and the seat cushion frame 3f correspond to “members constituting the vehicle seat” of the present invention.

  Specifically, each reclining device 4, 4 can be switched to a locked / unlocked state in accordance with the shaft rotation operation of each operation shaft 4 c, 4 c inserted through the shaft center portion thereof, Since the operation shafts 4c and 4c are integrally connected to each other by the connecting rod 4r, the switching operation to the respective lock / unlock states is performed simultaneously in synchronism with the left and right. . Each of the reclining devices 4 and 4 is normally held in an operating state locked by a spring biasing structure described later, and is held in a state where the backrest angle of the seat back 2 is fixed. The fixed state of the backrest angle of the seat back 2 is such that the operation shafts 4c and 4c are simultaneously moved by pulling up a release lever provided on the side of the seat cushion 3 on the vehicle outer side (right side in FIG. 2). It is released by rotating the shaft. By this release operation, the seat back 2 can be freely adjusted in its backrest angle position. Further, by stopping the release operation, the reclining devices 4 and 4 are again returned to the locked state by the spring biasing structure, and the seat back 2 is returned to the state in which the backrest angle is fixed.

  Here, springs (not shown) that urge the seat back 2 to always rotate forward are seated between both side portions of the seat back frame 2f and both side portions of the seat cushion frame 3f. Has been. By this spring biasing force, the seat back 2 is lifted up to a position where it hits the back of the seated occupant by releasing the fixed state of the backrest angle, and follows the movement of tilting the back of the seated occupant back and forth. The backrest angle position can be moved to freely change. Here, when the backrest angle position of the seatback 2 described above is in an angle region that is tilted to the rear side of the seat from a position where the backrest angle stands straight upward, the backrest is stopped by stopping the operation of the release lever. Although the angle is returned to the fixed state (locked state), the backrest angle is fixed even if the operation of the release lever is stopped by entering the angle region tilted forward from the standing position toward the front of the seat ( It is not returned to the locked state.

  The angle region where the former backrest angle is returned to the fixed state is a rotation region of a lock zone set in each of the reclining devices 4 and 4 described later, and the latter backrest angle is fixed. The angle region that is not returned is a free zone rotation region set in each of the reclining devices 4 and 4 described later. When the seat back 2 is pushed down to the front side of the seat by the urging force of the spring by operating the release lever in a state where no person is sitting on the vehicle seat 1 by setting the rotation area of the free zone. When the seat back 2 is pushed down to a position exceeding the above-mentioned standing position, the seat back 2 is pushed forward largely to the position where it is folded into the upper surface of the seat cushion 3 even if the release lever is released. It has come to include.

  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 reclining device 4 arranged on the vehicle outer side shown on the right side in FIG. As shown in FIG. 1, the reclining device 4 includes a disc-shaped ratchet 10 and a guide 20, four poles 30... (... indicates a plurality), a rotating cam 40, a hinge cam 50, and a spiral. It has a spring 60, an outer peripheral ring 70, a release plate 80, and a free zone plate 90, and these are assembled together in the axial direction. Here, the ratchet 10 corresponds to the “one side disk member” of the present invention, the guide 20 corresponds to the “other side disk member” of the present invention, and each of the poles 30. The outer peripheral ring 70 corresponds to the “outer peripheral holding member” of the present invention. In FIG. 1, the ratchet 10 and the guide 20 are arranged side by side so as to face each other so that the inner surface of the ratchet 10 and the guide 20 is well illustrated.

  Specifically, the ratchet 10 is formed with a cylindrical portion 12 that protrudes in a cylindrical shape in a plate thickness direction that is an assembling direction to the guide 20 on the outer peripheral portion of the disk portion 11. The cylindrical portion 12 is formed by being extruded by half-cutting the outer peripheral portion of the disk portion 11 in the plate thickness direction. An inner peripheral tooth surface 12a having inner teeth that can mesh with outer peripheral tooth surfaces 30a of the poles 30 to be described later is formed on the inner peripheral surface of the cylindrical portion 12 over the entire peripheral region. ing. As shown in FIG. 3, the ratchet 10 is integrally connected by joining the outer disk surface of the disk portion 11 to the outer plate surface of the seat back frame 2f.

  Specifically, the disc portion 11 of the ratchet 10 is formed with a plurality of dowels 13a... And D dowels 13b protruding in a cylindrical shape from the outer disc surface. These dowels 13a... And D dowels 13b are arranged and formed at equal intervals in the circumferential direction at positions relatively close to the outer peripheral edge side of the disk portion 11. Among these, the D dowel 13b is formed by cutting a part of the protruding cylindrical shape into a D-shaped cross section, and the shape is distinguished from each dowel 13a protruding in the cylindrical shape. It has become.

  On the other hand, in the seat back frame 2f, dowel holes 2a,..., And D dowel holes 2b through which the above-described dowels 13a,. . Therefore, these dowels 13a... And D dowels 13b are respectively fitted into dowel holes 2a... And D dowel holes 2b formed in the seat back frame 2f, and these fitting portions are welded and joined respectively. Thus, the ratchet 10 is firmly and integrally connected to the seat back frame 2f (see FIG. 7). Here, as shown in FIG. 1, the operation shaft 4 c (see FIG. 2) for performing the locking / unlocking switching operation of the reclining device 4 is inserted into the shaft portion 11 of the disk portion 11 of the ratchet 10 described above. A through hole 14 is formed for this purpose. As shown in FIG. 3, a through hole 2 c having the same purpose is formed through the seat back frame 2 f at a position coaxial with the through hole 14.

  Next, returning to FIG. 1, the configuration of the guide 20 will be described. The guide 20 is formed in a disk shape having substantially the same diameter as the ratchet 10, and the guide 20 protrudes in the plate thickness direction, which is the assembly direction to the ratchet 10, at four positions on the disk portion 21 in the circumferential direction. Walls 21a, 21b, 21c, and 21d (hereinafter referred to as guide walls 21a to 21d) are formed. These guide walls 21 a to 21 d are formed by partially punching part of the disk portion 21 in the plate thickness direction, and the outer peripheral surfaces thereof are circular arcs of the same circle drawn around the axial center portion of the guide 20. It is formed in a curved shape. The circular shape drawn by connecting the arcs of the outer peripheral surfaces of these four guide walls 21a to 21d is slightly smaller than the circular shape of the inner peripheral surface (inner peripheral tooth surface 12a) of the cylindrical portion 12 of the ratchet 10. . Therefore, the guide walls 21 a to 21 d of the guide 20 are fitted into the cylindrical portion 12 of the ratchet 10 by assembling the guide 20 having the guide walls 21 a to 21 d and the ratchet 10 in the plate thickness direction (axial direction). In other words, they are assembled in a state where they are supported on the inside and outside so as to be rotatable relative to each other.

  As shown in FIG. 4, the outer surface of the disk portion 21 of the guide 20 is joined and integrally connected to the inner surface of the seat cushion frame 3 f. Specifically, 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 disc surface. These dowels 24a... And D dowels 24b are arranged and formed at equal intervals in the circumferential direction at positions relatively close to the outer peripheral edge side 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, the seat cushion frame 3f is formed with penetrating dowel holes 3a,... And D dowel holes 3b through which the above-mentioned dowels 24a,. . Therefore, by fitting these dowels 24a... And D dowels 24b into dowel holes 3a .. and D dowel holes 3b formed in the seat cushion frame 3f, and welding these fitting portions to join them. The guide 20 is firmly and integrally connected to the seat cushion frame 3f (see FIG. 7). Here, as shown in FIG. 1, the operation shaft 4 c (see FIG. 2) for performing the switching operation between the locking and unlocking of the reclining device 4 is inserted into the shaft center portion of the disk portion 21 of the guide 20 described above. A through hole 25 is formed for this purpose. The seat cushion frame 3f is also formed with a through-hole 3c having the same purpose passing through 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 passed through the hole.

  Returning to FIG. 1, the above-described disk portion 21 of the guide 20 has a guide groove 23 that is recessed in a “ten” sign shape in the thickness direction on the inner surface of the disk. The guide groove 23 is formed by half-cutting the disk portion 21 in a “ten” sign shape in the plate thickness direction, and the guide walls 21a to 21d described above are formed at the four corners of the portion where the groove shape crosses. Is formed in a state protruding in a standing wall shape. Each of the above-described dowels 24a... And D dowels 24b is formed so as to protrude from the board surface outside the portion where the guide groove 23 is formed.

  Of the groove shape recessed in the “ten” symbol shape, the above-described guide groove 23 has four groove portions that extend from the axial center portion of the guide 20 in the respective radial directions in the illustrated vertical and horizontal directions, respectively. The two poles 30 are formed as pole grooves 23a, 23b, 23c, and 23d (hereinafter referred to as pole grooves 23a to 23d) that can be accommodated therein. Further, the guide walls 21a to 21d formed so as to protrude in the form of standing walls at the four corners of the portions where the groove shapes of the respective guide grooves 23 cross each other are respectively connected to the respective poles 30 · accommodated in the respective pole grooves 23a to 23d. It is configured as a support portion that is applied to the side surfaces of the poles 30 and supports the poles 30 so as to be movable only inward and outward in the radial direction in the pole grooves 23a to 23d. Further, the central groove portion where the groove shape of the guide groove 23 crosses is formed as a cam groove 23e capable of accommodating a rotating cam 40 described later. The cam groove 23e is formed in such a size that the rotary cam 40 can be rotated in the groove. The disk portion 21 of the guide 20 is formed with spring hook portions 26 and 26 protruding in a pin shape from two positions on the outer disk surface. These spring hook portions 26 and 26 are functional portions 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. (See FIG. 4).

  Next, the configuration of the four poles 30 described above will be described. These poles 30... Can be moved only inward and outward in the radial direction along the shapes in the respective pole grooves 23a to 23d by being set in the respective pole grooves 23a to 23d formed in the guide 20 described above. It is arrange | positioned as the state supported in the circumferential direction so that it may become. These pawls 30 are external teeth whose outer peripheral surfaces are curved in accordance with the inner peripheral surface shape of the cylindrical portion 12 so that the outer peripheral surfaces can mesh with the inner peripheral tooth surface 12a of the cylindrical portion 12 of the ratchet 10 described above. The outer peripheral tooth surface 30a is formed to have the following.

  As shown in FIG. 5, each of the poles 30... Configured as described above is pressed and slid by a rotating cam 40, which will be described later, so that the outer peripheral tooth surfaces 30a. 10 is engaged with the inner peripheral tooth surface 12a of the cylindrical portion 12. As a result, each pole 30... Is brought into an integral state in the rotational direction (circumferential direction) with respect to the ratchet 10 as being pressed against the ratchet 10 by the pressing force of the rotating cam 40. Held.

  In the relationship with the guide 20, each of the poles 30 can be slid only inward and outward in the radial direction by the circumferential support by the guide walls 21a to 21d. Therefore, the ratchet 10 is engaged with each of the poles 30... So that the ratchet 10 is integrated with the guide 20 through the poles 30. It is held in the state. As a result, the reclining device 4 is rotationally locked.

  As shown in FIG. 6, the rotation lock state of the reclining device 4 is such that the rotary cam 40 is rotated in the clockwise direction in the drawing, and the respective poles 30 are drawn inwardly in the radial direction. It is released by releasing from the meshing state. Here, the operation of pushing the respective poles 30... To the outer side in the radial direction by the rotating operation of the rotating cam 40 is performed as shown in FIG.・ ・ It is performed by the corner part 44 ・ ・. Further, the operation of pulling the respective poles 30... Inward in the radial direction by the rotation operation of the rotary cam 40 is performed by a release plate 80 attached to the rotary cam 40.

  Specifically, at the outer peripheral portion of the rotating cam 40, the legs 32 of the poles 30 are respectively moved from the radially inner side by the rotational movement of the rotating cam 40 at a plurality of locations in the circumferential direction. A pressing shoulder 42 is formed. In addition to the shoulder portions 42..., The inner peripheral surface of each pole 30. Corners 44... That are pressed from the inner side in the direction are formed so as to protrude outward in the radial direction. As a result, the rotating cam 40 pushes each pole 30... By three points from the inner side in the radial direction by each shoulder 42... And each corner 44. Then, it is pushed out outward in the radial direction.

  A thin disk-shaped release plate 80 is mounted on the disk surface of the rotating cam 40 so as to be integrated in the rotational direction. Specifically, the release plate 80 has mounting holes 81... That are formed through the three circumferential positions in the vicinity of the center of the release plate 80. 45... Are fitted into the rotating cam 40 so as to be integrated in the rotational direction. The release plate 80 is engaged with the respective hooks 31... Projecting from the respective poles 30... In the plate thickness direction (axial direction) as the rotary cam 40 rotates. Retracting holes 82 are formed so as to be operated so as to be retracted inward in the radial direction.

  These drawing holes 82... Are formed as drawing surfaces 82 a... Whose outer peripheral surfaces are inclined inward in the radial direction toward the counterclockwise direction in FIG. As shown in FIG. 6, the pull-in surfaces 82a... Are hooked to the poles 30... When the release plate 80 is rotated from the state of FIG. Each of the poles 30... Is applied to the portion 31... From the outer peripheral surface side, and is pulled inward in the radial direction by the guide of the inclined surface shape. Here, when the poles 30 are moved inward in the radial direction, their leg portions 32 enter into the grooves 43 formed in the outer peripheral portion of the rotary cam 40. Is allowed. A circular hole 83 is formed in the center of the release plate 80 for inserting the operation shaft 4c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4 described above.

  By the way, as shown in FIG. 5, the rotating cam 40 is normally rotated and biased in the counterclockwise direction shown in the figure via a hinge cam 50 mounted in the through hole 41 at the center thereof. Each leg 30 ... of each pole 30 ... is run on each shoulder 42 ..., and the inner peripheral surface of each pole 30 ... is pressed from the inner periphery side by each corner 44 ... The outer peripheral tooth surfaces 30a of the poles 30 are held against the inner peripheral tooth surface 12a of the ratchet 10 in a meshed state.

  As shown in FIG. 6, the rotating cam 40 is pushed in the same direction by rotating the hinge cam 50 in the clockwise direction in the figure against the urging force, via the release plate 80. Each pole 30... Is pulled inward in the radial direction to be disengaged from the meshed state with the ratchet 10. Next, the configuration of the hinge cam 50 that performs the rotation operation will be described. As shown in FIG. 1, the hinge cam 50 is inserted into a through hole 25 formed in the central portion of the guide 20 described above, and is pivotally supported so as to be rotatably supported. The operation projection 52 formed to protrude from the outer peripheral portion of the shaft portion is set so as to be fitted in a through hole 41 formed through the central portion of the rotary cam 40. Specifically, the hinge cam 50 is set in a state in which the operation protrusion 52 is inserted into an operation hole 41 a that is recessed in a part of the peripheral edge in the through hole 41 of the rotating cam 40.

  The hinge cam 50 is normally urged to rotate counterclockwise with respect to the guide 20 as viewed in FIG. 1 by the urging force of the spiral spring 60 hooked between the hinge cam 50 and the guide 20. ing. As a result, the hinge cam 50 is normally configured to apply a rotational biasing force in the same direction (counterclockwise direction toward the paper surface of FIG. 1) to the rotary cam 40 via the operation protrusion 52. As shown in FIG. 4, the spiral spring 60 is in a state of being twisted in advance, and an inner end 61 thereof is hooked on a spring hooking portion 51 of the hinge cam 50, and an outer end 62 is a spring hooking portion of the guide 20. 26 is provided. The operation shaft 4c described above with reference to FIG. 2 is inserted into the hinge cam 50 in the axial direction and is integrally mounted in the rotational direction. As a result, the hinge cam 50 is rotated in the clockwise direction in the figure against the urging force of the spiral spring 60 shown in FIG. 1 by performing the pulling-up operation of the operation lever 5 described above with reference to FIG. ing.

  Next, returning to FIG. 1, the configuration of the outer peripheral ring 70 will be described. The outer peripheral ring 70 is composed of two parts 70A and 70B made of a thin steel plate punched out in an arc shape. These parts 70A and 70B are axially projected to the inner side in the radial direction at one end on the far right side in the drawing by half-cutting the outer peripheral portion of each arc-shaped surface in the axial direction. Flange-shaped holding surface portions 71 and 71 having surfaces facing in the direction are formed, and surrounding portions 72 and 72 projecting in a semi-cylindrical shape in the axial direction are formed on the outer peripheral portions of the holding surface portions 71 and 71, respectively. ing. As shown in FIG. 7, the parts 70 </ b> A and 70 </ b> B of the outer ring 70 have their holding surface portions 71 and 71 pivoted on the outer periphery (cylindrical portion 12) of the ratchet 10 with respect to the ratchet 10 and guide 20 described above. Assigned to the outer side of the direction, and the surrounding parts 72, 72 straddle the outer peripheral part (cylindrical part 12) of the ratchet 10 and the outer peripheral part 22 of the guide 20, respectively, covering these outer peripheral parts from the outer side in the radial direction. It comes to be assembled in a state.

  Specifically, as shown in FIGS. 8 to 9, the parts 70 </ b> A and 70 </ b> B of the outer peripheral ring 70 are curved in an arc shape having a gentler curvature than the outer peripheral portion 22 of the guide 20. Is formed. And these parts 70A and 70B are assembled | attached to the outer peripheral part 22 of the guide 20 from the radial direction outer side, respectively, and each one point contact | abutting of the center of those circular arc shapes contact | abutted by the difference in curvature with this outer peripheral part 22 In a state where the portions 73A and 73B are respectively laser welded to the outer peripheral portion 22, other portions are bent and assembled along the outer peripheral portion 22. And each said parts 70A and 70B are made into the state by which each end part 74A and 74B by which the above-mentioned bending process was carried out was match | combined in the circumferential direction, respectively, and these match | combined edge parts 74A and 74B. They are welded together and fixed to the outer peripheral portion 22 of the guide 20 by laser welding.

  Here, as for each part 70A, 70B of the outer periphery ring 70 mentioned above, the length of the perimeter combined in the circumferential direction is set longer than the periphery length of the outer peripheral part 22 of the guide 20, and the bending mentioned above is carried out. By being assembled along the outer peripheral portion 22 of the guide 20 by processing, the end portions 74A and 74B that are mated with each other are superposed in the circumferential direction. However, the shapes of the end portions 74A and 74B of the parts 70A and 70B that are mated with each other are shifted from each other in the axial direction so that the circumferential overlap between them is released. The guide 20 has a relief structure that can absorb a difference in circumference with the outer peripheral portion 22 of the guide 20.

  Specifically, as shown in FIGS. 1 and 10, the end portions 74A and 74B of the parts 70A and 70B that are combined with each other have a convex shape extending in the circumferential direction from different axial positions. The circumferential length difference from the outer peripheral portion 22 of the guide 20 described above is such that the convex shapes do not overlap with each other in the axial direction, but are in contact with each other in the axial direction. It can be absorbed by a configuration that can be taken over a wide range. As a result, the surrounding portions 72 and 72 of the parts 70A and 70B are in a state in which the circumferential length difference from the outer peripheral portion 22 of the guide 20 is absorbed, and the outer peripheral portion 22 of the guide 20 is absorbed by the two surrounding portions 72 and 72. Can be integrally coupled by laser welding to the outer peripheral portion 22 of the guide 20 at four positions in the circumferential direction. And by the said coupling | bonding, the outer periphery ring 70 is the state which hold | maintained the ratchet 10 with respect to the guide 20 so that it may not remove | deviate to the axial direction with the holding surface parts 71 and 71 of each part 70A, 70B. Are held in an axially assembled state.

  Laser welding for connecting the parts 70A and 70B of the outer ring 70 to the outer peripheral portion 22 of the guide 20 is performed by irradiating these contact portions with laser light from outside in the radial direction. However, in this laser welding, the contact portions between the surrounding portions 72 and 72 of the parts 70A and 70B of the outer peripheral ring 70 and the outer peripheral portion 22 of the guide 20 are respectively outside in the axial direction of the guide 20 (the paper surface in FIG. 7). Since the relationship is exposed to the right side), laser light can be irradiated straight from the outside of the guide 20 in the axial direction toward the contact portion.

  Incidentally, as shown in FIG. 1, a thin disc-shaped free zone plate 90 is attached to the ratchet 10 described above. The free zone plate 90 has mounting holes 91... Formed through two positions in the circumferential direction in the vicinity of the center of the disk portion, and the mounting holes 91. By being fitted to the mounting projections 15... That are formed to protrude upward, the mounting is integrally performed on the ratchet 10 in the rotational direction. Further, a through hole 94 is formed in the center of the free zone plate 90 so as to pass through the operation shaft 4c (see FIG. 2) for performing the unlocking switching operation of the reclining device 4 described above.

  The free zone plate 90 is formed with a relief opening 92 that opens in a wide arc shape in a portion near the outer periphery thereof. The relief port 92 is assembled in a state in which the protrusion 33 formed on the upper pole 30 (the pole 30 set in the pole groove 23a) shown in FIG. The pole 30 is formed in a size that can escape the movement that is pushed by the rotating cam 40 and pushed outward in the radial direction.

  However, a restriction surface 93 is formed on a part of the outer peripheral surface of the escape port 92 so as to protrude from the outer peripheral surface to the radially inner side in a shelf shape. As can be seen with reference to FIG. 6, the restriction surface 93 is arranged in the circumferential direction so as to be rotated integrally with the ratchet 10. 30) is positioned at a position ahead of the traveling direction in which the locking movement is performed, so that the locking movement of the pole 30 is prevented by riding on the protrusion 33.

  Specifically, the restricting surface 93 has a protruding portion 33 at a position in the middle of movement before the outer peripheral tooth surface 30a of the pole 30 meshes with the inner peripheral tooth surface 12a of the ratchet 10 when the pawl 30 is locked. To prevent the reclining device 4 from being locked. Then, when the lock movement of the pole 30 is prevented, the rotation movement of the rotary cam 40 which applies a pressing force in the pushing direction to the pole 30 is also stopped, and the lock movement of the other three poles 30. And the reclining device 4 is locked in the unlocked state.

  In this way, in the rotation angle region where the regulating surface 93 formed on the above-described free zone plate 90 interferes with the protrusion 33 of the pole 30 on the upper side in the figure, the locking operation of the reclining device 4 is prevented, and the reclining device 4 Is kept in the unlocked state, and this rotation angle region is set as a rotation angle region constituting the above-mentioned free zone. Further, the rotation angle region in which the pawl 30 meshes with the ratchet 10 without the restriction surface 93 interfering with the protrusion 33 of the upper pole 30 in the drawing is set as a lock zone in which the reclining device 4 is returned to the locked state. ing.

  Thus, according to the configuration of the reclining device 4 of the present embodiment, the parts 70A and 70B constituting the outer peripheral ring 70 are formed in the arc shape with a gentle curvature, so that the parts 70A and 70B are guided to the guide 20. The parts 70A and 70B are brought into contact with the outer peripheral part 22 only at one contact part 73A and 73B, respectively, due to the difference in curvature. . Since the contact points 73A and 73B can be obtained at the targeted points due to the difference in curvature, the parts 70A and 70B are appropriately attached to the guide 20 by welding the contact points 73A and 73B. Can be joined and assembled.

  Moreover, even if the total perimeter of each part 70A, 70B of the outer ring 70 is set longer than the perimeter of the outer peripheral part 22 of the guide 20 to be assembled, the parts 70A, 70B can be assembled without overlapping. Therefore, the parts 70 </ b> A and 70 </ b> B of the outer peripheral ring 70 can be widely applied to the outer peripheral portion 22 of the guide 20 and appropriately joined and assembled. Further, the end portions 74A and 74B of the parts 70A and 70B that are mated with each other are welded together with the outer peripheral portion 22 of the guide 20 so as to be integrally coupled, thereby making the parts 70A and 70B stronger with respect to the guide 20. Can be properly joined and assembled.

  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, the vehicle seat coupling device of the present invention can also be applied to applications in which the seat back is tiltably coupled to the vehicle body floor and the seat cushion is tiltably coupled to the vehicle body floor. Further, the vehicle seat connecting device can be applied to a use for connecting the seat body so as to be rotated in the turning direction with respect to the vehicle body floor. The vehicle seat connecting device can also be applied to a so-called ottoman device that lifts and supports the lower leg of a seated occupant from the lower side so as to be tiltably connected to a seat cushion or a vehicle body floor.

  In the above embodiment, the ratchet 10 is connected to the seat back frame 2f and the guide 20 is connected to the seat cushion frame 3f. However, the ratchet is assembled to the seat cushion frame, and the guide is attached to the seat back frame. The structure which is assembled | attached may be sufficient. Moreover, although the operation of locking / unlocking of the poles 30 corresponding to the “locking member” of the present invention is performed by a straight sliding motion in the radial direction, it is shown in the circumferential direction. It may be performed by another form of movement that involves movement of Moreover, in the said Example, although the pole 30 ... was illustrated in the structure installed in four places of the circumferential direction, the arrangement | positioning number of poles may be any of 1-3.

  Further, in the above-described embodiment, the combined circumference of the parts 70A and 70B of the outer peripheral ring 70 (corresponding to the “outer peripheral holding member” of the present invention) is the guide 20 (the “other side of the present invention”). In this example, the length of the outer peripheral portion 22 is set to be longer than that of the outer peripheral portion 22, but may be set to be shorter. In this case, both ends 74A and 74B of the parts 70A and 70B of the outer ring 70 cannot be connected to each other, but the parts 70A and 70B are welded to the outer peripheral part 22 of the guide 20 and integrated. As long as they are connected. Further, the welding between the outer peripheral holding member and the disk member on the other side may be performed by arc welding.

  Further, in the vehicle seat coupling device, a disk member having an internal gear and a disk member having an external gear mesh with each other inward and outward as in the configuration described in Japanese Patent Application Laid-Open No. 2011-073480. As a state, the structure of the type which makes these rotate relatively in the aspect which changes a mutual meshing position may be sufficient. The relative rotation between the two gears is strongly pressed by the gear member on one side against the gear member on the other side by the pressing force of the wedge structure (corresponding to the lock member of the present invention) provided between the two gears. To be locked.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2f Seat back frame (member which comprises vehicle seat)
2a Dowel hole 2b D Dowel hole 2c Through hole 3 Seat cushion 3f Seat cushion frame (member constituting vehicle seat)
3a Dowel hole 3b D Dowel hole 3c Through hole 4 Reclining device (vehicle seat coupling device)
4c Operation shaft 4r Connecting rod 5 Operation lever 10 Ratchet (disk member on one side)
DESCRIPTION OF SYMBOLS 11 Disk part 12 Cylindrical part 12a Inner peripheral tooth surface 13a Dowel 13b D dowel 14 Through-hole 15 Mounting protrusion 20 Guide (disc member of the other side)
21 disk part 21a-21d guide wall 22 outer peripheral part 23 guide groove 23a-23d pole groove 23e cam groove 24a dowel 24b D dowel 25 through hole 26 spring hook part 30 pole (lock member)
30a Outer peripheral tooth surface 31 Hook part 32 Leg part 33 Projection part 40 Rotating cam 41 Through hole 41a Operation hole part 42 Shoulder part 43 Groove part 44 Corner part 45 Mounting protrusion 50 Hinge cam 51 Spring hook part 52 Operation protrusion 60 Spiral spring 61 Inner end 62 Outer end 70 Outer ring (outer ring holding member)
70A, 70B Parts 71 Holding surface portion 72 Enclosure portion 73A, 73B Abutting location 74A, 74B End portion 80 Release plate 81 Mounting hole 82 Drawing hole 82a Drawing surface 83 Through hole 90 Free zone plate 91 Mounting hole 92 Relief port 93 Restriction surface 94 Through hole

Claims (3)

A vehicle seat coupling device having a rotation stopping function for coupling two members constituting a vehicle seat to each other in a relatively rotatable state.
Two disk members assembled in an axial direction so that they can rotate relative to each other;
A locking member assembled between the two disk members to prevent these rotations;
An outer periphery holding member that is assembled between the outer peripheral portions of the two disk members to prevent these axial dislocations, and
The outer peripheral holding member has a holding surface portion that is axially applied to the outer peripheral portion of the disk member on one side, and is assembled to the outer peripheral portion of the disk member on the other side from the outside in the radial direction and integrated by welding. It is configured to be combined with
The outer periphery holding member is composed of a plurality of parts divided in the circumferential direction, and each part is formed to be curved into an arc shape having a gentler curvature than the outer periphery of the disk member on the other side. And each part is assembled to the outer peripheral part of the disk member on the other side from the outer side in the radial direction, and a contact point at each point where the parts come into contact with each other due to a difference in curvature from the outer peripheral part is welded. A connecting device for a vehicle seat, wherein other parts are bent and assembled along the outer peripheral portion of the disk member. The vehicle seat coupling device according to claim 1,
Each of the parts of the outer periphery holding member is set so that the combined perimeter is longer than the outer perimeter of the disk member on the other side, and the shapes of the ends that are combined with each other are mutually The structure is provided with a relief structure capable of absorbing the circumferential length difference with respect to the outer peripheral part of the disk member on the other side by being shifted in the axial direction and being allowed to escape the circumferential overlap of each other. A connecting device for a vehicle seat. The vehicle seat coupling device according to claim 1 or 2,
Each of the parts of the outer periphery holding member is integrally connected by welding the ends of the parts to each other together with the outer periphery of the disk member on the other side.

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