JP5531875B2 - Vehicle seat coupling device and vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat coupling device that couples a first member and a second member of a vehicle seat so that the angle can be adjusted, and a vehicle seat having the coupling device.

  The connecting device is used in a reclining device that connects the seat cushion and the seat back so that the angle can be adjusted. A conventional coupling device includes an internal tooth member having an annular inner peripheral surface formed with a plurality of internal teeth as referred to Patent Document 1, and external teeth that are smaller than the number of internal teeth and mesh with the internal teeth. It has an external tooth member provided with the formed annular | circular shaped outer peripheral surface. A cylindrical collar is provided at the center of the inner tooth member, and an annular bearing bush into which the collar is inserted is provided at the center of the outer tooth member. A pair of arcuate wedges is provided between the collar and the bearing bush.

  The pair of wedges are urged by a spring from a wide space region between the collar and the bearing bush to a narrow space region and push the collar and the bearing bush. As a result, the backlash between the inner teeth and the outer teeth becomes zero, and relative rotation of the inner teeth member and the outer teeth member is restricted. When the inner tooth member and the outer tooth member are relatively rotated, the pair of wedges are slid along the collar by the driver member. Thereby, an internal tooth member and an external tooth member rotate relatively.

  Furthermore, the coupling device described in Patent Document 1 has a brake structure that restricts the relative rotation of the internal gear member and the external gear member by an external force such as vibration. The brake structure includes a cylindrical spring bush attached to the external tooth member, an annularly wound braking spring installed on the inner peripheral side of the spring bush, and a control cam formed on the first wedge. When the first wedge slides along the collar by an external force such as vibration, the control cam pushes the braking spring, and the braking spring increases in the radial direction. The braking spring comes into contact with the inner peripheral surface of the spring bush, thereby restricting the sliding of the first wedge. Thus, the relative rotation of the inner tooth member and the outer tooth member may be restricted.

JP 2008-543456 A

  However, the brake structure of the coupling device described in Patent Document 1 is a complicated structure. Therefore, a vehicle seat coupling device that can regulate the relative rotation of the internal gear member and the external gear member with a simple structure has been conventionally required.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat coupling device or a vehicle seat having the configuration described in each claim. According to one feature, the vehicle seat coupling device includes an inner tooth member having an annular inner peripheral surface formed with a plurality of inner teeth and outer teeth that are smaller than the number of inner teeth and mesh with the inner teeth. An outer tooth member having an annular outer peripheral surface, a first slide receiving member provided on the inner tooth member and having an annular first sliding surface, and provided on the outer tooth member and facing the first sliding surface A second slide receiving member having an annular second sliding surface, first and second wedges slidably disposed between the first sliding surface and the second sliding surface, and a first sliding surface; A spring capable of restricting the relative rotation of the inner tooth member and the outer tooth member by biasing the first and second wedges from a wide space region between the second sliding surfaces to a narrow space region; The input member has an input member that can rotate the inner tooth member and the outer tooth member relative to each other by sliding the wedge along the first sliding surface and the second sliding surface. The first wedge has a larger coefficient of friction with respect to at least one of the first sliding surface and the second sliding surface than the second wedge.

  Accordingly, when an external force such as vibration receives a force in a direction in which the inner tooth member and the outer tooth member rotate relative to each other, the second wedge can receive a force in a direction in which the second wedge slides against the spring. On the other hand, since the first wedge has a high friction coefficient, it is difficult to slide with respect to the first sliding surface or the second sliding surface. The first wedge regulates the sliding of the second wedge via the spring, and thereby, the relative rotation of the inner tooth member and the outer tooth member by the first and second wedges can be restricted.

  On the other hand, when the first and second wedges are slid by the input member and the inner tooth member and the outer tooth member are rotated relative to each other, the friction coefficient of the second wedge is small. It can easily move from a wide spacing area between the first sliding face and the second sliding face to a narrow area. Therefore, the inner tooth member and the outer tooth member can be relatively easily rotated in one direction by the second wedge. For example, the inner tooth member and the outer tooth member can be relatively easily rotated by the second wedge with respect to the direction in which the sheet member is rotated against its own weight. Thus, the angle of the first member and the second member of the sheet can be easily adjusted.

It is a left view of a vehicle seat. It is a disassembled perspective view of a connection device. It is a partial exploded perspective view of a connecting device. It is a side view of a connection device. It is a partial cross section figure of a connecting device.

  One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a 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 11a and 12a. The frames 11a and 12a are connected by a connecting device (reclining device) 1 so that the angle can be adjusted.

  As shown in FIGS. 2 and 3, the coupling device 1 includes a first coupling member 2 and a second coupling member 3 that are stacked so as to be relatively rotatable. The 1st connection member 2 has the internal tooth member 2a and the 1st slide receiving member 2c integrally. The internal tooth member 2a has a ring-shaped and annular inner peripheral surface, and a plurality of internal teeth 2a1 are formed at equal intervals on the inner peripheral surface.

  As shown in FIGS. 2 and 3, a plate portion 2b is provided on one side surface of the internal tooth member 2a to cover the inner peripheral side of the internal tooth member 2a. The plate portion 2b is a circular plate shape, and has an inner surface facing the second connecting member 3 and an outer surface facing in the direction opposite to the inner surface. The plate portion 2b is provided with a plurality of attachment portions 2b1 protruding in the plate thickness direction. The attachment portion 2b1 is attached to the frame 12a of the seat back 12 shown in FIG. A hole is formed in the center of the plate portion 2b, and a first slip receiving member 2c is provided on the outer peripheral edge of the hole.

  As shown in FIG. 3, the first slide receiving member 2 c is ring-shaped and protrudes from the plate portion 2 b toward the second connecting member 3. The first sliding receiving member 2c has an annular first sliding surface 2c1 on the outer peripheral surface. By inserting the first slip receiving member 2c into the second slip receiving member 3c of the second connecting member 3, the first sliding surface 2c1 faces the second slip receiving member 3c. The arc center of the first slip receiving member 2c is located on the same line as the arc center of the internal tooth member 2a. As shown in FIG. 2, a hole 2d is formed at the center of the first slip receiving member 2c, and the shaft portion 8a of the input member 8 is rotatably inserted into the hole 2d.

  As shown in FIGS. 2 and 3, the second connecting member 3 integrally includes an external tooth member 3 a and a second slip receiving member 3 c. The external tooth member 3a has a ring-shaped and annular outer peripheral surface, and a plurality of external teeth 3a1 are formed at equal intervals on the outer peripheral surface. As shown in FIG. 5, the number of external teeth 3a1 is smaller than the number of internal teeth 2a1, for example, one less. The outer diameter of the outer tooth member 3a is smaller than the inner diameter of the inner tooth member 2a, and the difference in diameter is equal to or greater than the height of the outer teeth 3a1 or the inner teeth 2a1.

  As a result, the inner tooth member 2a and the outer tooth member 3a rotate relative to each other while the inner tooth 2a1 and the outer tooth 3a1 mesh with each other as shown in FIG. At this time, the rotational center 2e of the internal tooth member 2a and the rotational center 3e of the external tooth member 3a are out of position. Therefore, the inner tooth member 2a and the outer tooth member 3a rotate relative to each other while being eccentric.

  The second slip receiving member 3c has a ring shape as shown in FIGS. 2 and 3, and is formed integrally with the outer peripheral edge of the hole formed at the center of the external tooth member 3a. An annular second sliding surface 3c1 is formed on the inner peripheral surface of the second sliding receiving member 3c. The arc center of the second slip receiving member 3c is located on the same line as the arc center of the external tooth member 3a. By inserting the first slip receiving member 2c into the second slip receiving member 3c, the second sliding surface 3c1 faces the first sliding surface 2c1. Since the center positions of the first slip receiving member 2c and the second slip receiving member 3c are shifted, a wide region and a narrow region are formed between the first slide surface 2c1 and the second slide surface 3c1. (Eccentric ring area).

  The 2nd connection member 3 has the ring-shaped flange part 3b in the outer peripheral part of the external tooth member 3a, as shown in FIG. The flange portion 3b is adjacent to the external tooth member 3a in the axial direction, and is provided on the outer side of the outer peripheral edge of the external tooth member 3a. Convex portions 3b1 and concave portions 3b2 are alternately formed in the circumferential direction on the outer peripheral surface of the flange portion 3b.

  As shown in FIG. 2, the coupling device 1 includes a ring member 4 that holds the first coupling member 2 and the second coupling member 3. The ring member 4 allows relative rotation of the first connecting member 2 and the second connecting member 3 and restricts the first connecting member 2 and the second connecting member 3 from moving in the axial direction. 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. Part 4d.

  The insertion part 4c is installed in the recessed part 3b2 of the 2nd connection member 3, as shown to FIG. The outer peripheral surface of the insertion portion 4 c and the outer peripheral surface of the convex portion 3 b 1 of the second connecting member 3 are substantially flush and are welded to the mounting portion 9 a formed on the mounting bracket 9. Thereby, a part of the outer peripheral part of the second connecting member 3 and a part of the ring member 4 are fixed to the mounting bracket 9.

  The ring body 4a faces the outer peripheral surface of the internal tooth member 2a so as to be slidable as shown in FIGS. 4 d of positioning parts face the outer surface of the outer peripheral part of the internal tooth member 2a so that sliding is possible. The restricting portion 4b faces the outer surface of the plate portion 2b of the first connecting member 2 so as to be slidable. Thereby, the first connecting member 2 and the second connecting member 3 can be prevented from being detached in the axial direction by the ring member 4.

  The connecting device 1 has first and second wedges 5 and 6 as shown in FIGS. The wedges 5 and 6 have an arc shape and are installed between the first sliding surface 2c1 and the second sliding surface 3c1. The wedges 5 and 6 have inner peripheral surfaces 5c and 6c facing the first sliding surface 2c1, and outer peripheral surfaces 5d and 6d facing the second sliding surface 3c1. The surface of the wedges 5 and 6 is coated, and the friction coefficient of the wedges 5 and 6 is adjusted by the coating.

  The coating applied to the first wedge 5 has a higher coefficient of friction than the coating provided to the second wedge 6. The coating applied to the first wedge 5 may use, for example, a friction coefficient stabilizer, molybdenum disulfide, fluorine, or the like. The friction coefficient with respect to the first sliding surface 2c1 and the second sliding surface 3c1 of the first wedge 5 is preferably 0.15 or more, and more preferably 0.15 to 0.2. The first wedge 5 has a higher coefficient of friction due to the coating, while the second wedge 6 has a lower coefficient of friction due to the coating.

  As shown in FIG. 5, the wedges 5 and 6 have first end portions 5 a and 6 a having a narrow tip, and second end portions 5 b and 6 b to which the end portion 7 b of the spring 7 is locked. By installing the wedges 5 and 6 between the first sliding surface 2c1 and the second sliding surface 3c1, the first end portions 5a and 6a face each other, and the second end portions 5b and 6b face each other. .

  As shown in FIGS. 3 and 5, the spring 7 integrally includes an arc-shaped main body portion 7 a and end portions 7 b extending from the respective end portions of the main body portion 7 a. The end portion 7b of the spring 7 is engaged with the second end portions 5b and 6b of the wedges 5 and 6, respectively, and the main body portion 7a biases the second end portions 5b and 6b away from each other. As a result, the wedges 5 and 6 are urged from a wide space region formed between the first sliding surface 2c1 and the second sliding surface 3c1 to a narrow space region, and the first end portions 5a and 6a are biased to the first sliding surface 2c1. And the second sliding surface 3c1. As a result, the wedges 5 and 6 push the first and second connecting members 2 and 3, and the backlash between the outer teeth 3 a 1 and the inner teeth 2 a 1 becomes zero. As a result, the first and second connecting members 2 and 3 become relatively unrotatable (locked).

  As shown in FIGS. 2 and 5, the coupling device 1 has an input member 8 that is operated when the first coupling member 2 and the second coupling member 3 are relatively rotated. The input member 8 integrally includes a shaft portion 8a, a flange portion 8b, and a wedge pressing portion 8c. The shaft portion 8 a is inserted into the hole 2 d of the first connecting member 2 and penetrates the first connecting member 2 and the second connecting member 3. An operation lever (not shown) is connected to the tip of the shaft portion 8a, and the input member 8 is axially rotated by the operation lever.

  The flange portion 8b has a disk shape as shown in FIG. 2 and extends from the shaft portion 8a in the radial direction. The flange portion 8 b covers the wedges 5 and 6, thereby restricting the wedges 5 and 6 from coming off the connecting members 2 and 3 in the axial direction.

  As shown in FIG. 2, the wedge pressing portion 8 c is formed at the edge of the flange portion 8 b and protrudes from the flange portion 8 b toward the connecting members 2 and 3. 2 and 5, the wedge pressing portion 8c is inserted between the first slide receiving member 2c and the second slide receiving member 3c, and is installed between the first end portions 5a and 6a of the wedges 5 and 6. The

  The second connecting member 3 shown in FIG. 2 is attached to the seat cushion 11 side by attaching the mounting bracket 9 to the frame 11a of the seat cushion 11 shown in FIG. The first connecting member 2 shown in FIG. 2 is attached to the seat back 12 side by attaching the attachment portion 2b1 to the frame 12a of the seat back 12 shown in FIG. Therefore, the angle of the seat cushion 11 and the seat back 12 can be adjusted by the connecting device 1.

  1, when the seat back 12 is raised from the rear position to the front as shown in FIG. 1, the input member 8 is rotated by an operation lever (not shown), and the wedge pressing portion 8c is rotated counterclockwise. . The wedge pressing portion 8c pushes the first wedge 5, and the first wedge 5 moves from the narrow space region of the first sliding surface 2c1 and the second sliding surface 3c1 toward the wide space region as shown in FIG. . The first wedge 5 pulls the spring 7, and the second wedge 6 is rotated counterclockwise by the spring 7.

  As shown in FIG. 5, the second wedge 6 moves counterclockwise and moves from a wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 toward a narrow space region. The second wedge 6 pushes the first slip receiving member 2c and the second slip receiving member 3c, thereby rotating the first connecting member 2 and the second connecting member 3 relative to each other while decentering them. At this time, since the second wedge 6 has a small coefficient of friction with respect to the first sliding surface 2c1 and the second sliding surface 3c1, it can rotate counterclockwise with a relatively small force. Thus, the first connecting member 2 and the second connecting member 3 are relatively rotated with a relatively small force, and the seat back 12 can be easily raised from the rear position to the front with respect to the seat cushion 11.

  As shown in FIG. 1, when the seat back 12 is tilted backward with respect to the seat cushion 11, the input member 8 is rotated by an operation lever (not shown), and the wedge pressing portion 8c is rotated clockwise as shown in FIG. Rotate. The wedge pressing portion 8c pushes the second wedge 6, and the second wedge 6 moves from the narrow space region between the first sliding surface 2c1 and the second sliding surface 3c1 toward the wide space region. The second wedge 6 pulls the spring 7, and the first wedge 5 is rotated clockwise by the spring 7.

  As shown in FIG. 5, the first wedge 5 moves clockwise from the wide space region of the first sliding surface 2c1 and the second sliding surface 3c1 toward the narrow space region. The first wedge 5 pushes the first slip receiving member 2c and the second slip receiving member 3c, thereby rotating the first connecting member 2 and the second connecting member 3 relative to each other while decentering them. At this time, the first wedge 5 has a large friction coefficient with respect to the first sliding surface 2c1 and the second sliding surface 3c1. However, the weight of the seat back 12 or the weight of the user applied to the seat back 12 is added to the first connecting member 2, and the first connecting member 2 is biased in the rotational direction with respect to the second connecting member 3. Therefore, the seat back 12 can be tilted backward with respect to the seat cushion 11 with a relatively small force.

  When the force applied to the operation lever is released, the springs 7 bias the wedges 5 and 6 from the wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 to the narrow space region. As a result, the wedges 5 and 6 are sandwiched between the first sliding surface 2c1 and the second sliding surface 3c1, and the first connecting member 2 and the second connecting member 3 are unable to rotate relative to each other again. As a result, the connecting device 1 can hold the seat back 12 at a predetermined angle with respect to the seat cushion 11 in a stepless manner.

  When an external force such as vibration is applied to the coupling device 1, for example, when the vehicle is traveling or when the user gets on or off the seat 10, vibration is applied to the coupling device 1. The weight of the seat back 12 due to vibration or the weight of the user applied to the seat back 12 is added. As a result, the second connecting member 3 attached to the seat back 12 receives a clockwise force as shown in FIG. Receives rotating force. Thereby, the second wedge 6 receives the force F.

  However, as shown in FIG. 5, since the friction coefficient between the first wedge 5 and the sliding surfaces 2c1 and 3c1 is high, the first wedge 5 is difficult to slide with respect to the sliding surfaces 2c1 and 3c1. Therefore, the first wedge 5 restricts the movement of the second wedge 6 with respect to the sliding surfaces 2c1 and 3c1 via the spring 7. Thereby, the relative rotation of the first connecting member 2 and the second connecting member 3 is restricted, and the seat back 12 can be prevented from involuntarily tilting with respect to the seat cushion 11. Further, since the seat back 12 is prevented from rotating unintentionally with respect to the seat cushion 11, the angle adjustment work for returning the seat back 12 to the original position is reduced.

  As described above, the coupling device 1 includes the internal tooth member 2a having an annular inner peripheral surface on which a plurality of internal teeth 2a1 are formed as shown in FIG. 5, the number of the internal teeth 2a1, and the internal teeth 2a1. An external tooth member 3a having an annular outer peripheral surface formed with meshing external teeth 3a1, a first slip receiving member 2c provided on the internal tooth member 2a and having an annular first sliding surface 2c1, and external teeth A second slide receiving member 3c having an annular second slide surface 3c1 provided on the member 3a and facing the first slide surface 2c1, and slidable between the first slide surface 2c1 and the second slide surface 3c1. The first and second wedges 5 and 6 and the first and second wedges 5 and 6 are attached from the wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 to the narrow space region. A spring 7 capable of restricting the relative rotation of the internal tooth member 2a and the external tooth member 3a by biasing, and the first and second wedges 5, The has a first sliding surface 2c1 and the second sliding surface 3c1 input member 8 which can internal teeth member 2a and the external gear member 3a rotated relative by sliding along. The first wedge 5 has a larger coefficient of friction with respect to the first sliding surface 2 c 1 and the second sliding surface 3 c 1 than the second wedge 6.

  Therefore, when an external force such as vibration receives a force in a direction in which the internal tooth member 2 a and the external tooth member 3 a rotate relative to each other, the second wedge 6 can receive a force in a direction in which the second wedge 6 slides against the spring 7. On the other hand, since the first wedge 5 has a high friction coefficient, it is difficult to slide with respect to the first sliding surface 2c1 or the second sliding surface 3c1. The first wedge 5 regulates the sliding of the second wedge 6 via the spring 7, whereby the relative rotation of the inner tooth member and the outer tooth member by the first and second wedges can be restricted.

  On the other hand, when the first and second wedges 5 and 6 are slid by the input member 8 to relatively rotate the inner tooth member 2a and the outer tooth member 3a, the friction coefficient of the second wedge 6 is small. The second wedge 6 can easily move from a wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 to a narrow region. Therefore, the inner tooth member 2a and the outer tooth member 3a can be relatively easily rotated in one direction by the second wedge 6. For example, the inner tooth member 2a and the outer tooth member 3a can be relatively easily rotated by the second wedge 6 with respect to the direction in which the component member (seat back 12) of the seat is rotated against its own weight. Thus, the angle of the first member (seat cushion 11) and the second member (seat back 12) of the seat 10 can be easily adjusted.

  As shown in FIG. 5, the first and second wedges 5 and 6 have inner peripheral surfaces 5c and 6c that face the center of the coupling device 1, and face opposite to the inner peripheral surfaces 5c and 6c and the second sliding surface 3c1. The outer peripheral surfaces 5d and 6d are opposed to each other. The outer peripheral surface 5d of the first wedge 5 has a larger coefficient of friction with respect to the second sliding surface 3c1 than the outer peripheral surface 6d of the second wedge 6.

  Therefore, when an external force such as vibration receives a force in the direction in which the internal tooth member 2a and the external tooth member 3a rotate relative to each other, the outer peripheral surface 5d of the first wedge 5 can receive a larger torque than the inner peripheral surface 5c. Or it can contact | abut to the sliding surfaces 2c1 and 3c1 in an area wider than the internal peripheral surface 5c. Since the outer peripheral surface 5 d has a larger coefficient of friction than the outer peripheral surface 6 d of the second wedge 6, the first wedge 5 is less likely to slide relative to the second sliding surface 3 c 1 than the second wedge 6. Become. Thus, the first wedge 5 is not easily slidable with respect to the second sliding surface 3c1 by the outer peripheral surface 5d, and the relative rotation of the inner tooth member 2a and the outer tooth member 3a can be effectively restricted.

  As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 11 and a seat back 12 connected to the rear portion of the seat cushion 11 via a connecting device 1. The first wedge 5 of the coupling device 1 is narrowly spaced from the wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 by the input member 8 when the seat back 12 is tilted backward with respect to the seat cushion 11. Move to the area (see FIG. 5).

  Therefore, when the first wedge 5 moves from the wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 to the narrow space region, the seat back 12 is rotated backward with respect to the seat cushion 11. At this time, the first wedge 5 has a coefficient of friction that is less likely to move than the second wedge 6, but when the seat back 12 rotates rearward with respect to the seat cushion 11, the weight of the seat back 12 or the seat The inner tooth member 2a and the outer tooth member 3a are easily rotated relative to each other according to the weight of the user applied to the back 12.

  On the other hand, when the seat back 12 is lifted from the rear position to the front against gravity, the second wedge 6 moves from the wide space region between the first sliding surface 2c1 and the second sliding surface 3c1 to the narrow space region. . Since the second wedge 6 has a smaller coefficient of friction than the first wedge 5, it is difficult for resistance to occur when the seatback 12 is lifted forward against gravity. Thus, it is easy to adjust the angle of the seat back 12 with respect to the seat cushion 11.

  The present invention is not limited to the above-described embodiment, and may be the following form. For example, the first connecting member 2 (inner tooth member 2a) may be attached to the frame 11a of the seat cushion 11, and the second connecting member 3 (outer tooth member 3a) may be attached to the frame 12a of the seat back 12. At this time, the wedges 5 and 6 having different friction coefficients exchange positions with each other. Thereby, the same effect as the above-mentioned embodiment can be obtained.

  In another embodiment, the diameter of the first slide receiving member 2c is larger than the diameter of the second slide receiving member 3c, the first slide receiving member has an annular first slide surface on the inner peripheral surface, and the second slide The receiving member may have an annular second sliding surface on the outer peripheral surface, and the first and second wedges may be slidably installed between the first sliding surface and the second sliding surface.

  In another form, the inner tooth member 2a and the first slip receiving member 2c are separate and non-rotatably attached to each other, and the outer tooth member 3a and the second slip receiving member 3c are separate and rotate with respect to each other. It may be installed impossible.

  In another form, the first wedge 5 has the same outer friction surface as the outer peripheral surface 5d having the higher friction coefficient than the outer peripheral surface 6d of the second wedge 6 and the same friction coefficient as the inner peripheral surface 6c of the second wedge 6. Or you may have the low inner peripheral surface 5c. In another form, the first wedge 5 has an inner peripheral surface 5c having a higher friction coefficient than the inner peripheral surface 6c of the second wedge 6, and a friction coefficient compared to the outer peripheral surface 6d of the second wedge 6. It may have the same or lower outer peripheral surface 5d.

  In another form, the coupling device 1 is provided between the seat cushion and the ottoman, and the first wedge is moved by the input member when the ottoman rotates downward relative to the seat cushion. Moving from a wide spacing area between the faces to a narrow spacing area, the second wedge is widened between the first sliding face and the second sliding face by the input member when rotating the ottoman upward relative to the seat cushion You may move from a space area to a narrow space area.

  In another form, a motor may be connected to the input member 8, and the input member 8 may be rotated by the output of the motor. In another form, the seat 10 may be mounted on a vehicle such as a ship or an aircraft.

DESCRIPTION OF SYMBOLS 1 ... Connection apparatus 2 ... 1st connection member 2a ... Internal tooth member 2a1 ... Internal tooth 2b ... Plate part 2c ... 1st slide receiving member 2c1 ... 1st sliding surface 2e ... Rotation center 3 ... 2nd connection member 3a ... External tooth Member 3a1 ... External tooth 3b ... Flange 3c ... Second slip receiving member 3c1 ... Second slide surface 3e ... Center of rotation 4 ... Ring member 5 ... First wedge 5c, 6c ... Inner peripheral surface 5d, 6d ... Outer peripheral surface 6 ... second wedge 7 ... spring 8 ... input member 9 ... mounting bracket 10 ... vehicle seat 11 ... seat cushion 12 ... seat back

Claims (3)

A vehicle seat coupling device that couples a first member and a second member of a vehicle seat so that the angle can be adjusted,
An external tooth having an inner peripheral member having an annular inner peripheral surface formed with a plurality of internal teeth, and an annular outer peripheral surface having fewer external teeth and meshing with the internal teeth A member, a first slide receiving member provided on the inner tooth member and having an annular first sliding surface, and an annular second sliding surface provided on the outer tooth member and facing the first sliding surface A second sliding receiving member, first and second wedges slidably disposed between the first sliding surface and the second sliding surface, the first sliding surface and the second sliding surface. A spring capable of restricting relative rotation of the inner tooth member and the outer tooth member by biasing the first and second wedges from a wide space region between the surfaces to a narrow space region; An input unit capable of relatively rotating the inner tooth member and the outer tooth member by sliding a second wedge along the first sliding surface and the second sliding surface. Have,
The vehicle seat coupling device, wherein the first wedge has a larger coefficient of friction with respect to at least one of the first sliding surface and the second sliding surface than the second wedge. The vehicle seat coupling device according to claim 1,
The first and second wedges face an inner peripheral surface facing the center of the coupling device, face the opposite side of the inner peripheral surface and face one sliding surface of the first sliding surface and the second sliding surface. Has an outer peripheral surface,
The vehicle seat coupling device, wherein the outer peripheral surface of the first wedge has a larger coefficient of friction with respect to the one sliding surface than the outer peripheral surface of the second wedge. A vehicle seat comprising the connecting device according to claim 1 or 2,
A seat cushion and a seat back coupled to the rear portion of the seat cushion via the coupling device;
The first wedge of the coupling device has a narrow spacing from a wide spacing area between the first sliding surface and the second sliding surface by the input member when the seat back is tilted backward with respect to the seat cushion. A vehicle seat that moves to an area.

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