JP2010194075A - Connecting device for vehicle seats - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting device for vehicle seats allowing a connecting member and ring member to be easily welded with a mounting bracket. <P>SOLUTION: The present invention relates to a connecting device 1 for vehicle seat having a first and second connecting members 2 and 3, a ring member 4 to hold the first and second connecting members 2 and 3 in the direction of a rotary shaft and a mounting bracket 5. The first connecting member 2 has a convex portion 2c and a depressed portion 2d on its outer peripheral rim. The ring member 4 has a ring body covering the outer peripheral surface of the second connecting member 3, a controlling part which controls the second connecting member 3 not to be removed from the first connecting member 2 in the direction of the axis by extending from the ring body toward one side of the second connecting member 3, and an inserting part 4c provided on the depressed part 2d of the first connecting member 2 extending from the ring body. The mounting bracket 5 has a mounting surface 5a facing the outer peripheral surface 2c1 of the convex part 2c of the first connecting member 2 and the outer peripheral surface of the inserting part 4c of the ring member 4. The mounting surface 5a and the outer peripheral surface 2c1 of the convex part 2c are welded together and the mounting surface 5a and the outer peripheral surface of the inserting part 4c are welded together. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat coupling device that couples two members of a vehicle seat so that the angle can be relatively adjusted.

  A connecting device (reclining device) for connecting a seat cushion of a vehicle seat and a seat back so that the angle can be adjusted is conventionally known (see Patent Document 1). The coupling device includes disk-shaped first and second coupling members that are stacked so as to be relatively rotatable, and a ring member that holds the first and second coupling members in the direction of the rotation axis. The first and second connecting members are overlapped in the thickness direction on one side surface of the mounting bracket attached to the seat back. The ring member has a ring body that covers the outer peripheral surfaces of the first and second connecting members. The outer peripheral portion of the first connecting member and one end edge of the ring main body are in contact with one side edge of the mounting bracket. And the outer peripheral part of a connection member and the one side edge of a ring main body are welded to a mounting bracket by the laser irradiated from the other side of the mounting bracket, respectively.

Special table 2007-532217 gazette

  However, the laser beam is emitted from the other side of the mounting bracket in which the outer periphery of the ring body and the one end edge of the ring body cannot be seen. Therefore, it is not easy to determine the position where the laser should be irradiated. In addition, when the first connecting member and the ring member are welded to the mounting bracket by one welding seam (welding path), it is necessary to meander the laser. Therefore, it becomes more difficult to determine the position where the laser should be irradiated. Then, this invention makes it a subject to provide the connection apparatus for vehicle seats which can weld a 1st connection member and a ring member to a mounting bracket easily.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat coupling device having the configuration described in each claim. According to the first aspect of the present invention, the first and second connecting members that are stacked to be relatively rotatable, the ring member for holding the first and second connecting members in the direction of the rotation axis, and the first A mounting bracket is provided for mounting the connecting member to one of the members. The 1st connection member has a convex part and a recessed part in the outer periphery. The ring member includes a ring main body that covers the outer peripheral surface of the second connecting member, and a second connecting member that protrudes from the ring main body to one side surface of the second connecting member and is separated from the first connecting member in the axial direction. A restricting portion for restriction and an insertion portion that extends from the ring main body and is installed in the recess of the first connecting member. The mounting bracket has a mounting surface facing the outer peripheral surface of the convex portion of the first connecting member and the outer peripheral surface of the insertion portion of the ring member. The mounting surface and the outer peripheral surface of the convex portion are welded, and the mounting surface and the outer peripheral surface of the insertion portion are welded.

  Accordingly, the mounting surface and the outer peripheral surface of the convex portion face each other, and these can be welded in a visible state. The mounting surface and the outer peripheral surface of the insertion portion also face each other, and these can also be welded in a visible state. Therefore, they can be easily and reliably welded. Since the first connecting member is welded to the mounting bracket and the ring member is welded to the mounting bracket, the movement of the second connecting member in the axial direction is restricted by the restricting portion of the ring member and the first connecting member. The As a result, the first and second connecting members are held in the axial direction by the ring member and the mounting bracket.

  According to invention of Claim 2, the outer peripheral surface of the convex part of a 1st connection member, the outer peripheral surface of the insertion part of a ring member, and the attachment surface of an attachment bracket are located on the substantially same circle. Therefore, the convex portion and the insertion portion can be welded to the mounting surface by one arc-shaped welding seam (welding path). Therefore, these can be welded smoothly and accurately.

  According to invention of Claim 3, the ring member has a positioning part extended from the ring main body and facing one side of the convex part of a 1st connection member. At least a part of the positioning portion is located in the vicinity of the welded portion of the outer peripheral surface of the convex portion and the mounting surface of the mounting bracket and is welded to the welded portion. Therefore, a part of the positioning member of the ring member can be welded to the mounting bracket. Therefore, the ring member can be strongly coupled to the mounting bracket. In addition, the positioning portion can be welded to the convex portion and the mounting surface at the same time. Therefore, the positioning portion can be welded to the convex portion and the mounting surface without increasing the number of work steps.

It is a left view of a vehicle seat. It is a disassembled perspective view of a connection device. It is a disassembled perspective view of a part of connecting device. It is a front view of a connecting device. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. 6 is a front view of a coupling device according to Embodiment 2. FIG. It is sectional drawing of the connection apparatus of Embodiment 3 corresponded in FIG.

(Embodiment 1)
The first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 10 is a seat mounted on a vehicle such as a vehicle, and includes a seat cushion 11 and a seat back 12. The seat cushion 11 and the seat back 12 have frames 11 a and 12 a, and the frames 11 a and 12 a are connected by a connecting device (reclining device) 1 so that the angle can be adjusted.

  The connecting device 1 includes first and second connecting members 2 and 3 and a ring member 4 as shown in FIGS. The first and second connecting members 2 and 3 are disk-shaped and are stacked so as to be rotatable relative to each other. The first connecting member 2 has an annular main body 2a and an annular flange 2b having a diameter larger than that of the main body 2a. External teeth 2a1 are formed on the outer peripheral surface of the main body 2a, and a support hole 2a2 is formed in the center of the main body 2a.

  As shown in FIGS. 2 and 3, the flange portion 2b is adjacent to the main body portion 2a in the axial direction, and is formed integrally with the main body portion 2a. On the outer peripheral edge of the flange portion 2b, a plurality of convex portions 2c and concave portions 2d are alternately formed in the circumferential direction. The convex part 2c protrudes in the radial direction, and the concave part 2d is concave in the radial direction. The convex portion 2c and the concave portion 2d have a predetermined length in the circumferential direction. The convex portion 2c has an arc-shaped outer peripheral surface 2c1, and the concave portion 2d has an arc-shaped bottom surface 2d1.

  As shown in FIGS. 2 and 3, the second connecting member 3 has an annular main body 3a, a disk-shaped bottom 3b, and a cylindrical portion 3c located at the center. Internal teeth 3a1 are formed on the inner peripheral surface of the main body 3a. The internal teeth 3a1 mesh with external teeth 2a1 formed on the main body 2a of the first connecting member 2 inserted into the main body 3a. Since the number of the inner teeth 3a1 is larger than the number of the outer teeth 2a1, the first and second connecting members 2 and 3 mesh in an eccentric state.

  As shown in FIG. 2, a plurality of mounting projections 3b1 projecting in the axial direction are formed on one side surface of the bottom 3b. The mounting protrusion 3b1 is inserted into a mounting hole 9a formed in the mounting bracket 9 as shown in FIG. And the outer periphery of the attachment convex part 3b1 and the edge part of the attachment hole 9a are welded. The cylindrical portion 3 c is formed at the center of the bottom portion 3 b and is inserted into the support hole 2 a 2 of the first connecting member 2. A pair of wedges 6 is installed between the hole forming surfaces of the cylindrical portion 3c and the support hole 2a2.

  2 and 5, the ring member 4 is a member that holds the first and second connecting members 2 and 3 in the axial direction in a relatively rotatable state. The ring member 4 includes a cylindrical ring body 4a, an annular restriction portion 4b formed at one end edge of the ring body 4a, a plurality of insertion portions 4c provided at the other end edge of the ring body 4a, and a plurality of positioning members. It has a portion 4d. The ring body 4 a covers the outer peripheral surface of the second connecting member 3. The restricting portion 4 b projects from the ring body 4 a to one side surface of the second connecting member 3 and restricts the second connecting member 3 from being separated from the first connecting member 2 in the axial direction.

  As shown in FIG. 2, the insertion portions 4c and the positioning portions 4d are alternately formed in the circumferential direction at one end edge of the ring body 4a. As shown in FIG. 5, the insertion portion 4c has a positioning portion 4c1 extending radially outward from the ring body 4a and an extending portion 4c2 extending in the axial direction from the tip of the positioning portion 4c1. As shown in FIG. 6, the positioning portion 4d extends radially outward from the ring body 4a. Therefore, as shown in FIGS. 5 and 6, the positioning portion 4 c 1 and the positioning portion 4 d come into contact with one side surface in the axial direction of the first connecting member 2, thereby determining the axial positions of the ring member 4 and the connecting member 2.

  As shown in FIGS. 2 and 5, the extended portion 4 c 2 of the insertion portion 4 c is inserted into the recess 2 d of the first connecting member 2. The extending portion 4c2 has substantially the same length as the axial thickness of the connecting member 2, and extends in the axial direction from one end edge 2e of the connecting member 2 to the other end edge 2f. The distal end portion of the extended portion 4c2 is located on substantially the same plane as the other end edge 2f. The circumferential length of the insertion portion 4c is substantially the same as the circumferential length of the recess 2d. Therefore, since the insertion portion 4 c is restricted from moving by the recess 2 d, the ring member 4 is restricted from rotating in the circumferential direction with respect to the connecting member 2.

  As shown in FIGS. 2 and 5, the inner peripheral surface of the extended portion 4c2 is located on substantially the same circle as the outer peripheral surface of the bottom surface 2d1 of the recess 2d. The outer peripheral surface of the extended portion 4c2 is located on substantially the same circle as the outer peripheral surface 2c1 of the convex portion 2c. The outer peripheral surface 2 c 1 of the convex portion 2 c and the outer peripheral surface of the insertion portion 4 c are installed on the mounting surface 5 a of the first mounting bracket 5. The mounting surface 5a is formed by recessing the mounting bracket 5 and has a circumferential length that is substantially half of the circle. The arc diameter of the mounting surface 5a has substantially the same diameter as the outer peripheral surface 2c1 of the convex portion 2c and the outer peripheral surface of the insertion portion 4c.

  As shown in FIGS. 4 and 5, the mounting surface 5a, the outer peripheral surface of the convex portion 2c, and the outer peripheral surface of the insertion portion 4c are located on substantially the same circle. By forming the weld seam 10a along this circle, the outer peripheral surface 2c1 of the convex portion 2c and the mounting surface 5a are welded, and the outer peripheral surface of the insertion portion 4c and the mounting surface 5a are welded. The weld seam 10a is substantially the same length as the attachment surface 5a and has a length that is substantially half the circumference. As shown in FIG. 6, the front end 4d1 of the positioning portion 4d is adjacent to the mounting surface 5a and the outer peripheral surface 2c1 of the convex portion 2c. Therefore, the front end portion 4d1 of the positioning portion 4d can also be welded to a welding portion that welds the mounting surface 5a and the outer peripheral surface 2c1 of the convex portion 2c.

  As shown in FIG. 4, each insertion portion 4 c that is not installed on the attachment surface 5 a is welded to the bottom surface 2 d 1 of each recess 2 d of the connecting member 2 by a welding seam 10 b. Thereby, the ring member 4 and the 1st connection member 2 are welded directly. The arc diameter of the weld seam 10b is smaller than that of the weld seam 10a.

  As shown in FIGS. 5 and 6, the second connecting member 3 is overlapped on the second mounting bracket 9 in the axial direction. The mounting protrusion 3b1 of the second connecting member 3 is inserted into a mounting hole 9a formed in the mounting bracket 9. And the outer peripheral surface of the attachment convex part 3b1 is welded to the edge of the attachment hole 9a. As a result, the second connecting member 3 is welded to the second mounting bracket 9. One of the first and second mounting brackets 5 and 9 is attached to the frame 11a, and the other one is attached to the frame 12a (see FIG. 1).

  The coupling device 1 includes a lock mechanism (6, 7) for locking the first and second coupling members 2 and 3 so as not to rotate and an unlocking member 8 for releasing the lock as shown in FIGS. ing. The locking mechanism has a pair of wedges 6 and a locking spring 7. The wedge 6 has an arc shape and is installed between the cylindrical portion 3c and the support hole 2a2. The locking spring 7 biases the pair of wedges 6 and pushes one end portion 6a of each wedge 6 between the cylindrical portion 3c and the support hole 2a2. As a result, the first and second connecting members 2 and 3 are pushed by the wedge 6, and the backlash between the external teeth 2a1 and the internal teeth 3a1 becomes zero. As a result, the first and second connecting members 2 and 3 cannot be rotated relative to each other.

  2 and 4, the unlocking member 8 includes a shaft portion 8a inserted into the cylindrical portion 3c, a flange portion 8b standing on the shaft portion 8a and covering the wedge 6, and a wedge protruding from the flange portion 8b. A push portion 8c is provided. The wedge pressing portion 8c is installed between the hole forming surfaces of the cylindrical portion 3c and the support hole 2a2. When the lock release member 8 is rotated by a motor or the like, the wedge pressing portion 8c presses one wedge 6, and the wedge 6 is released from the cylindrical portion 3c and the support hole 2a2.

  One wedge 6 rotates along the cylindrical portion 3 c and pushes the other wedge 6. The other wedge 6 rotates along the cylindrical portion 3 c and pushes the cylindrical portion 3 c, thereby rotating the second connecting member 3 relative to the first connecting member 2. As a result, the relative angle between the first and second connecting members 2 and 3 changes. When the force of the motor or the like is released, the pair of wedges 6 are fitted between the hole forming surfaces of the cylindrical portion 3c and the support hole 2a2 by the lock spring 7. Thereby, the 1st and 2nd connection members 2 and 3 become relative non-rotatable again. Thus, the coupling device 1 holds the seat back 12 at a predetermined angle with respect to the seat cushion 11.

  As described above, the first connecting member 2 has the convex portion 2c and the concave portion 2d on the outer peripheral edge as shown in FIG. The ring member 4 has the insertion part 4c installed in the recessed part 2d. The mounting bracket 5 has a mounting surface 5 a that faces the outer peripheral surface 2 c 1 of the convex portion 2 c of the first connecting member and the outer peripheral surface of the insertion portion 4 c of the ring member 4. Then, the mounting surface 5a and the outer peripheral surface 2c1 of the convex portion 2c are welded, and the mounting surface 5a and the outer peripheral surface 4c1 of the insertion portion 4c are welded.

  Therefore, the mounting surface 5a and the outer peripheral surface 2c1 of the convex portion 2c face each other, and these can be welded in a visible state. The mounting surface 5a and the outer peripheral surface 4c1 of the insertion portion 4c also face each other, and these can be welded in a visible state. Therefore, they can be easily and reliably welded. When the first connecting member 2 is welded to the mounting bracket 5 and the ring member 4 is welded to the mounting bracket 5, the movement of the second connecting member 3 in the axial direction as shown in FIG. The movement of the second connecting member 3 in the axial direction is restricted by the restricting portion 4 b and the first connecting member 2. Accordingly, the first and second connecting members 2 and 3 are held in the axial direction by the ring member 4 and the mounting bracket 5.

  4, the outer peripheral surface 2c1 of the convex portion 2c of the first connecting member 2, the outer peripheral surface 4c1 of the insertion portion 4c of the ring member 4, and the mounting surface 5a of the mounting bracket 5 are on substantially the same circle. positioned. Therefore, the convex part 2c and the insertion part 4c can be welded to the attachment surface 5a by one arc-shaped welding seam (welding path) 10a. Therefore, these can be welded smoothly and accurately.

  Moreover, the ring member 4 has the positioning part 4d as shown in FIG. At least a part (tip portion 4d1) of the positioning portion 4d is located in the vicinity of the welded portion (10a) between the outer peripheral surface 2c1 of the convex portion 2c and the mounting surface 5a of the mounting bracket 5 and is welded to the welded portion. Therefore, the ring member 4 can also be welded to the mounting bracket 5 with a part of the positioning portion 4d. Therefore, the ring member 4 can be strongly coupled to the mounting bracket 5. Further, the positioning portion 4d can be welded to the convex portion 2c and the attachment surface 5a at the same time. Therefore, the positioning part 4d can be welded to the convex part 2c and the mounting surface 5a without increasing the number of work steps.

  Further, as shown in FIGS. 2 and 5, the mounting bracket 5 is partially cut away at the outer peripheral edge to form the mounting surface 5 a. On the other hand, since the conventional mounting bracket is welded in a state where the connecting members are stacked in the thickness direction, the above-described notched portion cannot be formed. Therefore, the mounting bracket 5 of this embodiment can be lighter than the conventional mounting bracket.

(Embodiment 2)
The second embodiment is formed in substantially the same manner as the first embodiment. However, the second embodiment is different in that the first mounting bracket 13 shown in FIG. 7 is provided instead of the first mounting bracket 5 shown in FIG. Hereinafter, the second embodiment will be described focusing on the differences.

  As shown in FIG. 7, the first mounting bracket 13 has a mounting hole 13b and a mounting surface 13a that is a hole constituting surface of the mounting hole 13b. The mounting hole 13b is circular, and the convex portion 2c of the first connecting member 2 and the insertion portion 4c of the ring member 4 are installed on the mounting surface 13a. The mounting surface 13a, the outer peripheral surface 2c1 of the convex portion 2c, and the outer peripheral surface 4c1 of the insertion portion 4c are located on substantially the same circle. By forming the weld seam 14 along this circle, the attachment surface 13a and the convex portion 2c are welded, and the attachment surface 13a and the insertion portion 4c are welded.

(Embodiment 3)
The second embodiment is formed in substantially the same manner as the first embodiment. However, it is different in that a positioning portion 4e shown in FIG. 8 is provided instead of the positioning portion 4d shown in FIG. Hereinafter, Embodiment 3 will be described focusing on the differences.

  The positioning part 4e extends radially outward from one end edge of the ring body 4a as shown in FIG. The positioning portion 4e extends along one side surface 2c2 of the convex portion 2c of the connecting member 2, and extends along one side surface of the first mounting bracket 5 beyond the convex portion 2c. The distal end portion 4e1 of the positioning portion 4e is along one side surface of the mounting bracket 5, and a part 4e2 of the positioning portion 4e is adjacent to the outer peripheral surface 2c1 of the convex portion 2c and the mounting surface 5a. A part 4e2 of the positioning part 4e is welded to a welding part that welds the mounting surface 5a and the outer peripheral surface 2c1 of the convex part 2c.

(Other embodiments)
The present invention is not limited to the first to third embodiments, and may be the following forms.
(1) The first and connection members 2 of the first to third embodiments have external teeth 2a1, and the second connection member has internal teeth 3a1. However, the first connecting member may have internal teeth and the second connecting member may have external teeth.
(2) In the coupling device 1 according to the first to third embodiments, the pair of coupling members 2 and 3 are locked by the lock mechanism having the wedge 6. However, it has a pair of connecting members, one connecting member has internal teeth, and the other one connecting member holds the external teeth member having external teeth so as to be movable in the radial direction. The pair of connecting members may be non-rotatable by meshing with each other.
(3) The coupling device 1 according to the first to third embodiments couples the seat back 12 to the seat cushion 11 so that the angle can be adjusted. However, the connecting device may be configured to connect the footrest, the armrest, the headrest, and the like attached to the seat body so as to be tiltable with respect to the seat body so that the angle can be adjusted.
(4) The convex part 2c of the connecting member 2 and the insertion part 4c of the ring member 4 in the first to third embodiments have an arcuate outer peripheral surface having substantially the same diameter. However, these may have different sizes of diameters or other shapes, and a mounting surface corresponding to the shape of the convex portion and the insertion portion may be formed on the mounting bracket.

DESCRIPTION OF SYMBOLS 1 ... Connection apparatus 2 ... 1st connection member 2a1 ... External tooth 2c ... Convex part 2c1, 4c1 ... Outer peripheral surface 2d ... Concave part 3 ... 2nd connection member 3a1 ... Internal tooth 4 ... Ring member 4a ... Ring main body 4b ... Restriction Part 4c ... Insertion part 4d, 4e ... Positioning part 5, 13 ... First mounting bracket 5a, 13a ... Mounting surface 9 ... Second mounting bracket 10 ... Vehicle seat 10a, 10b, 14 ... Weld seam 11 ... Seat cushion ( Element)
12 ... Seat back (member)

Claims (3)

A vehicle seat coupling device that couples two members of a vehicle seat so that the angle can be relatively adjusted,
The first and second connecting members which are stacked so as to be relatively rotatable, the ring member for holding the first and second connecting members in the rotation axis direction, and the first connecting member as one of the members. Has a mounting bracket for mounting on
The first connecting member has a convex portion and a concave portion on its outer peripheral edge,
The ring member includes a ring main body that covers an outer peripheral surface of the second connecting member, and extends from the ring main body to one side surface of the second connecting member, and the second connecting member extends from the first connecting member. A regulating portion that regulates separation in the axial direction, and an insertion portion that extends from the ring body and is installed in the recess of the first connecting member,
The mounting bracket has a mounting surface facing an outer peripheral surface of the convex portion of the first connecting member and an outer peripheral surface of the insertion portion of the ring member, and the outer peripheral surface of the mounting surface and the convex portion is welded, In addition, the vehicle seat coupling device is characterized in that the mounting surface and the outer peripheral surface of the insertion portion are welded. The vehicle seat coupling device according to claim 1,
The vehicle seat coupling device, wherein the outer peripheral surface of the convex portion of the first connecting member, the outer peripheral surface of the insertion portion of the ring member, and the mounting surface of the mounting bracket are located on substantially the same circle. The vehicle seat coupling device according to claim 1 or 2,
The ring member has a positioning portion that extends from the ring body and faces one side surface of the convex portion of the first connecting member, and at least a part of the positioning portion is attached to the outer peripheral surface of the convex portion and the mounting bracket. A vehicle seat coupling device located near a welded portion of a surface and welded to the welded portion.

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