JP4424150B2 - Damper for automobile seat and automobile seat equipped with this damper - Google Patents

Description

  The present invention relates to a damper for an automobile seat that absorbs energy generated by the operation of the automobile seat and eliminates an abrupt operation caused by the rapid acceleration of the automobile seat, and an automobile seat equipped with the damper.

JP 2002-321553 A

  For example, in Patent Document 1, a housing fixed to an automobile seat, and an automobile seat is fixed to a chassis that is rotatably installed and is rotatably accommodated in the housing. A gap forming member that forms a gap in cooperation with the inner surface, and a silicon-based unvulcanized rubber disposed in the gap, and a silicon-based unvulcanized rubber by relative rotation between the housing and the gap-forming member. A damper for an automobile seat that causes rubber shearing has been proposed.

  By the way, in such a damper for an automobile seat, the silicon-based unvulcanized rubber is sheared based on relative rotation between a housing fixed to the automobile seat and a gap forming member fixed to the chassis of the automobile. Therefore, it is difficult to further increase the relative rotational speed of the housing and the gap forming member, and thus the resistance to the slow movement of the automobile seat is not increased so much. It is difficult to suddenly increase resistance to sudden movement.

  The present invention has been made in view of the above-described points, and the object of the present invention is not to increase the resistance of a vehicle seat to a slow specific operation while increasing the resistance of a vehicle seat to a sudden specific operation. It is an object of the present invention to provide a damper for an automobile seat that can be increased in size and an automobile seat equipped with the damper.

  A damper for an automobile seat according to the present invention includes an oscillating body that is oscillated by an operation of the automobile seat, a rotator that is rotatable with respect to the oscillating body and that forms a gap between the oscillating body, The fluid disposed in the gap and the swing of one swinging direction of the swinging body are transmitted to the rotating body as the rotational force of the rotating body, while the swinging body is based on the swing of the other swinging direction of the swinging body. A transmission means for releasing transmission, the transmission means being a fixed body fixed to the automobile seat, and a large-diameter gear held by the fixed body so as to be movable in the same direction as the swinging direction of the swinging body. A rack gear that extends in the same direction as the swinging direction and that is provided on the fixed body and meshes with the large-diameter gear, and has a smaller diameter than the large-diameter gear and is fixed to the rotating body. The large-diameter gear approaches and meshes with the large-diameter gear based on the oscillation in one of the oscillation directions And a small-diameter gear whose large-diameter gear is separated based on the oscillation of the other oscillating direction of the oscillating body and the meshing is released, and a fixed amount provided on the oscillating body and the large-diameter gear with respect to the small-diameter gear. A separation prohibiting body for prohibiting the above separation.

  According to the damper for an automobile seat of the present invention, in particular, the transmission means has a large-diameter gear that is held by the fixed body so as to be movable in the same direction as the oscillating direction of the oscillating body, and a smaller diameter than the large-diameter gear. The large-diameter gear approaches and meshes with the large-diameter gear on the basis of the oscillation in one oscillation direction of the oscillation body, and the oscillation in the other oscillation direction of the oscillation body. The large-diameter gear is separated from the large-diameter gear and the meshing is released, so that the rotation speed of the small-diameter gear can be increased with respect to the oscillation of the oscillating body. Depending on the rotational speed of the small-diameter gear, shear resistance can be generated in the fluid, and the reaction force of the large-diameter gear can be increased in relation to the gear ratio of the large-diameter gear and the small-diameter gear. The vehicle seat does not increase the resistance to slow motion Resistance to rapid operation of the over bets can be rapidly increased. According to this automobile seat damper, in particular, the transmission means is provided in the large-diameter gear and the small-diameter gear, and the oscillating body, and the separation means for prohibiting the separation of the large-diameter gear from the small-diameter gear by a certain amount or more. Since the forbidden body is provided, the transmission means can be configured more easily and inexpensively, so that a so-called clutch mechanism or the like need not be interposed between the rotating body and the small diameter gear, and the small diameter gear can be made more It can be made close to the rotating body, and the damper itself can be miniaturized.

  In a preferable example of the damper for an automobile seat according to the present invention, the fixed body is fixed to the seat portion of the automobile seat, and the oscillating body is oscillated by rotating the seat back of the automobile seat. It has become so. According to this example, the rotational energy of the backrest that can be rotated (raised freely) with respect to the seat portion of the automobile seat is absorbed, and the impact when the backrest is raised or returned, the unrest of the backrest. It is possible to eliminate sudden jumping up due to sudden braking at the time of locking, sudden return due to sudden acceleration of the raised backrest, and the like.

  In another preferable example of the damper for an automobile seat according to the present invention, the fixed body is fixed to an automobile seat lift mechanism in which the seat portion of the automobile seat is connected to the automobile chassis so as to be movable up and down. The rocking body is rocked by raising and lowering the seat. According to this other example, the rising energy or the lowering energy of the seat portion of the automobile seat that can be moved up and down with respect to the chassis of the automobile is absorbed, and an impact or a sudden rise or lowering when the seat portion is raised or lowered. The descent can be eliminated.

  In a preferred example of the damper for an automobile seat according to the present invention, the fixed body is a main body adjacent to the swinging body, a gear housing portion that is defined in the main body and houses a large-diameter gear and a small-diameter gear, A guide groove is provided in a portion defining the gear housing portion of the main body and guides the large-diameter gear in the same direction as the swinging direction.

  In a preferred example of the automobile seat damper according to the present invention, the separation prohibiting body protrudes toward the fixed body and is provided on the swinging body, and is arranged on one side with respect to the swinging direction with respect to the swinging direction of the small diameter gear. The large-diameter gear is sandwiched with a gap between the large-diameter gear and the large-diameter gear is moved in the same direction as the other oscillating direction. The small diameter gear and the large diameter gear are prohibited from separating a certain amount or more, while the large diameter gear is separated based on the swinging of the swinging body in one swinging direction. Yes.

  In a preferable example of the damper for an automobile seat according to the present invention, the fluid is made of a viscous material having a low viscosity.

  According to the present invention, there is provided a damper for an automobile seat capable of increasing the resistance to a specific sudden operation of the automobile seat while increasing the resistance to the specific operation of the automobile seat not much, and the damper. Car seats can be provided.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 12, an automobile seat 1 of this example includes a seat portion 2 and a backrest 3, a connecting mechanism 4 that connects the backrest 3 to the seat portion 2 so as to be rotatable in the A and B directions, A damper 5 attached to the connecting mechanism 4, a lift mechanism 7 that connects the seat 2 to the chassis 6 so as to be raised and lowered, and a damper 8 attached to the lift mechanism 7 are provided. The backrest 3 is urged toward the B direction with respect to the seat portion 2 by urging means (not shown) made of a spring or the like. Further, the automobile seat 1 is provided with a so-called lock mechanism (not shown) that maintains the rotational state in the A direction with respect to the seat portion 2 of the backrest 3 in a releasable manner.

  The connection mechanism 4 includes a connection arm 11 that is rotatably connected to the seat portion 2 and is fixed to the backrest 3.

  For example, as shown in FIGS. 1 and 11, the lift mechanism 7 is rotatably connected to the connecting portions 12 and 13 provided in the seat portion 2 and the chassis 6, respectively, and to the connecting portions 12 and 13. And a connecting arm 14. The seat 2 is raised and lowered by rotation in the C and D directions around the axis of the connecting portion 13 of the connecting arm 14 on the chassis 6 side.

  For example, as shown in FIGS. 2 to 4, the damper 5 includes a support shaft 21 fixed to the seat portion 2, and A and B with respect to the seat portion 2 of the backrest 3 while being rotatably supported by the support shaft 21. Between the oscillating body 22 that is oscillated in the A and B directions around the axis 28 of the support shaft 21 by rotation in the direction, and the oscillating body 22 that is rotatable in the R1 direction with respect to the oscillating body 22. The rotating body 24 that forms the gap 23, the fluid 25 that is disposed in the gap 23, the lid body 26 that is attached to the rocking body 22, and the rocking body 22 that swings in the B direction. Transmission means 27 for transmitting the rotation force in the R1 direction to the rotating body 24 and releasing the transmission based on the swinging of the swinging body 22 in the A direction.

  The seat 2 is fixed to one end of the support shaft 21 and the transmission means 27 is fixed to the other end of the support shaft 21, and the connecting arm 11 and the rocking body 22 are rotatably mounted between both ends of the support shaft 21. Has been.

  The oscillating body 22 is defined in the main body 32 having a through-hole 31 in which the support shaft 21 is disposed, a fixed shaft 33 that fixes the main body 32 to the connecting arm 11, and the rotating body 24. And a rotating body housing portion 34 for housing the housing. The fixed shaft 33 and the rotating body accommodation portion 34 are arranged with the through hole 31 therebetween. The rocking body 22 is fixed to the backrest 3 via the fixed shaft 33 and the connecting arm 11.

  An inner surface 35 of the main body 32 that defines the rotating body housing portion 34 is provided with a central concave portion 36 that is concave toward the rotating body 24, and a central concave portion 36 that is centered on the inner surface 35 and is convex toward the rotating body 24. A plurality of concentric arc-shaped convex portions 37 are formed.

  The rotating body 24 is convex toward the central concave portion 36 and is concave toward the central convex portion 41 that is rotatably fitted in the central concave portion 36 in the R1 direction and toward the plurality of arc-shaped convex portions 37. The convex portion 37 is arranged with a gap 23 and has a plurality of concentric cylindrical concave portions 42 provided around the central convex portion 41. The rotating body 24 cooperates with the oscillating body 22 by the rotation in the R1 direction to generate resistance due to shearing of the fluid 25. A distance L1 from the rotation axis 45 of the rotating body 24 to the axis 28 of the support shaft 21 is longer than a distance L2 from the axis 46 of the fixed shaft 33 to the axis 28 of the support shaft 21.

  The fluid 25 is made of a viscous material such as silicon oil. The viscous material has a viscosity of, for example, 30,000 centistokes (cSt) to 1 million centistokes, and preferably 30,000 centistokes to 300,000. It has a viscosity of centistokes, more preferably a low viscosity of 30,000 centistokes to 50,000 centistokes.

  The lid body 26 has a substantially hexagonal outer periphery 51 and is provided with a through hole 52 in the center. The outer periphery 51 has an inner periphery of a body 32 complementary to the outer periphery 51. 53 is pressure-bonded, and the rotating body 24 is inserted into the through hole 52 so as to be rotatable in the R1 direction. Such a lid 26 prevents leakage of the fluid 25 from the gap 23.

  The transmission means 27 includes a fixed body 61 fixed to the support shaft 21, a large-diameter gear 62 held by the fixed body 61 movably in the A and B directions, and a fixed body 61 extending in the A and B directions. And a rack gear 63 that meshes with the large-diameter gear 62, and has a smaller diameter than the large-diameter gear 62 and is fixed to the rotating body 24, and is based on the oscillation of the oscillating body 22 in the B direction. A small-diameter gear 64 in which the large-diameter gear 62 approaches and meshes with the large-diameter gear 62, and the large-diameter gear 62 is separated based on the oscillation in the A direction of the oscillating body 22 and the meshing is released. And a separation prohibiting body 65 that prohibits separation of the large diameter gear 62 from the small diameter gear 64 by a certain amount or more.

  The fixed body 61 fixed to the seat portion 2 via the support shaft 21 includes a fan-shaped main body 71 adjacent to the rocking body 22, a main body 71, and a large-diameter gear 62 and a small-diameter gear 64. A gear accommodating portion 72 that is accommodated, and a guide groove 73 that is provided in a portion defining the gear accommodating portion 72 of the main body 71 and guides the large-diameter gear 62 in the A and B directions are provided. . The gear housing portion 72 is disposed adjacent to the rotating body 24.

  The large-diameter gear 62 is provided in the gear main body 75 having a larger diameter than the small-diameter gear 64, and is slidably contacted with the guide groove 73 and guided to the guide groove 73 in the A and B directions. The guide pin 76 is provided.

  The rack gear 63 is disposed in the gear housing portion 72 and fixed to the main body 71, and applies a rotational force in the R2 direction to the large-diameter gear 62 that is moved in the A and B directions.

  The small-diameter gear 64 has a smaller diameter than the large-diameter gear 62 and is fixed to the rotating body 24 so that the rotation axis 45 is at the center. The small-diameter gear 64 is moved in the A direction via the rotating body 24 by the swinging of the swinging body 22 in the A direction and separated from the large-diameter gear 62, while the swinging body 22 is swinging in the B direction. Accordingly, the large-diameter gear 62 is moved closer to the large-diameter gear 62 via the rotating body 24. The rotational speed of the small diameter gear 64 may be about 6.55 times that of the large diameter gear 62.

  Such a fixed body 61 is fixed to the seat portion 2 so that the central portion 79 of the guide groove 73 is positioned below both end portions 80a and 80b of the guide groove 73. According to such a fixed body 61, when the small-diameter gear 64 is moved in the B direction at a low speed from the end 80a side to the central portion 79, the large-diameter gear 62 is less than the small-diameter gear 64 based on its own weight. Since the rotation of the backrest 3 in the B direction at the initial stage of rotation in the B direction does not cause resistance due to shearing of the fluid 25 and the small-diameter gear 64 has an end portion. When moving in the B direction at a higher speed than the movement in the B direction based on the weight of the large-diameter gear from the 80a side to the center part 79, the shearing of the fluid 25 is performed even when the backrest 3 is rotated in the B direction. May cause resistance. Further, according to the fixed body 61, when the small diameter gear 64 is moved in the B direction from the central portion 79 toward the end portion 80b, the movement in the B direction based on the weight of the large diameter gear 62 occurs. First, the small-diameter gear 64 meshes with the large-diameter gear 62 and moves in the B-direction while pushing the large-diameter gear 62, so that a resistance due to shearing of the fluid 25 is generated in the later rotation of the backrest 3 in the B-direction. obtain.

  The separation prohibiting body 65 protrudes toward the fixed body 61 and is provided integrally with the main body 32, and is disposed on the B direction side of the small diameter gear 64 and has a large diameter with a gap 78 between the small diameter gear 64. A gear 62 is sandwiched between the small-diameter gear 64 and the large-diameter gear 62 so that the small-diameter gear 64 and the large-diameter gear 62 are separated from each other by a certain amount or more. On the other hand, the large-diameter gear 62 is separated from the large-diameter gear 62 based on the swing of the swing body 22 in the B direction. In this example, in addition to the separation prohibiting body 65, the transmission means 27 is configured in the same manner as the separation prohibiting body 65 and also includes a separation prohibiting body 65a disposed on the A direction side from the small diameter gear 64. When the separation prohibiting body 65a is also provided, for example, the small diameter gear 64 and the separation prohibiting body 65a are excluded except for the large diameter gear 64 between the small diameter gear 64 and the separation prohibiting body 65. By arranging the large-diameter gear 62 between them, the swinging of the swinging body 22 in the A direction is transmitted to the rotating body 24 as the rotational force of the rotating body 24 in the R1 direction, while the swinging body 22 swings in the B direction. The configuration of the transmission means 27 can be easily changed so as to cancel the transmission.

  For example, as shown in FIGS. 5 and 6, the damper 8 includes a support shaft 81 fixed to the connection portion 13, and a support shaft 81 that is rotatably supported by the support shaft 81. Between the swinging body 82 swinging in the C and D directions around the axis 28 of the support shaft 81 by the rotation in the D direction, and rotatable in the R1 direction with respect to the swinging body 82 and between the swinging body 82 The rotating body 84 forming the gap 83, the fluid 85 disposed in the gap 83, the lid 86 attached to the rocking body 82, and the rocking body 82 in the D direction. 84 is transmitted to the rotating body 84 as a rotational force in the R1 direction of 84, and a transmission means 87 for releasing the transmission based on the swinging of the swinging body 82 in the C direction is provided.

  The support shaft 81, the swing body 82, the rotating body 84, the fluid body 85, the lid body 86, and the transmission means 87 are the support shaft 21, the swing body 22, the rotary body 24, the fluid body 25, the lid body 26, and the transmission means 27, respectively. Since they are configured in substantially the same manner, the same reference numerals are given to the following drawings, and detailed description thereof will be omitted. The large diameter gear 62 of the transmission means 87 is disposed with a gap 78 between the small diameter gear 64 of the transmission means 87 and the separation prohibiting body 65a. In addition, the fluid 85 does not necessarily have the same viscosity as that of the fluid 25 and is set to a desired viscosity according to the weight of the automobile seat 1 and the like. Further, in the fixed body 61 of the transmission means 87, the end portion 80b of the guide groove 73 is located below the center portion 79 and the end portion 80a, and the end portion 80a is located above the center portion 79 and the end portion 80b. When the small-diameter gear 64 of the transmission means 87 is moved in the D direction from the end portion 80b side to the end portion 80a side by being fixed in this way, The movement in the B direction based on the weight of the large diameter gear 62 of the transmission means 87 does not occur, and the small diameter gear 64 meshes with the large diameter gear 62 and moves in the D direction while pushing the large diameter gear 62. The resistance of the fluid 85 due to shearing can be generated immediately after the initial rotation in the D direction.

  When the above-described automobile seat 1 is changed from the state shown in FIG. 1 to the state shown in FIG. 7 by the rotation of the backrest 3 in the A direction, the rotation of the backrest 3 in the A direction is transmitted via the connecting arm 11. The oscillating body 22 is oscillated in the direction A about the axis 28 of the support shaft 21. After the oscillation, the damper 5 is in a state as shown in FIG. In such a case, the small-diameter gear 64 is moved in the A direction along with the oscillation of the oscillator 22 and is separated from the large-diameter gear 62, so that the rotor 24 does not rotate in the R1 direction. There is no resistance due to shear.

  When the vehicle seat 1 is changed from the state shown in FIG. 7 to the state shown in FIG. 1 by the rotation of the backrest 3 in the B direction, the swinging body to which the rotation of the backrest 3 in the B direction is transmitted via the connecting arm 11. 22 is swung in the direction B about the axis 28 of the support shaft 21, and after swinging, the damper 5 is in the state shown in FIG. In such a case, the small-diameter gear 64 is moved in the B direction along with the swing of the rocking body 22, the large-diameter gear 62 approaches and meshes with the large-diameter gear 62, and the small-diameter gear 64 is further moved in the B direction. Accordingly, the small-diameter gear 64 pushes the large-diameter gear 62 to move it in the B direction, and the large-diameter gear 62 to be moved is rotated in the R2 direction while traveling on the rack gear 63. By this rotation, the small-diameter gear 64 is rotated in the R1 direction. Therefore, rotation in the R1 direction occurs in the rotating body 24 to which the small-diameter gear 64 is fixed, and thus resistance due to shearing of the fluid 25 occurs. Here, since the transmission means 27 transmits the rotation of the large-diameter gear 62 to the small-diameter gear 64, the rotational speed of the small-diameter gear 64 can be increased and the shear resistance of the fluid 25 is generated depending on the rotational speed. Thus, when a small B-direction turning force is applied to the backrest 3, the fluid 25 does not generate much resistance due to shearing, while a large B-direction turning force is applied to the backrest 3. In this case, the resistance of the fluid 25 due to shearing can be rapidly increased.

  When the vehicle seat 1 is changed from the state shown in FIG. 1 to the state shown in FIG. 9 by the rotation of the backrest 3 in the B direction, it is the same as the case where the vehicle seat 1 is changed from the state shown in FIG. 7 to the state shown in FIG. In addition, shear resistance of the fluid 25 occurs. When the automobile seat 1 is in the state shown in FIG. 9, the damper 5 is in the state shown in FIG.

  When the vehicle seat 1 is changed from the state shown in FIG. 9 to the state shown in FIG. 1 by the rotation of the backrest 3 in the A direction, it is the same as the case where the vehicle seat 1 is changed from the state shown in FIG. 1 to the state shown in FIG. In addition, the shear resistance of the fluid 25 does not occur.

  When the automobile seat 1 is raised by the rotation of the connecting arm 14 in the C direction to change from the state shown in FIG. 1 to the state shown in FIG. 11, the swinging body 82 to which the rotation in the C direction is transmitted from the connecting arm 14. Is swung in the C direction around the axis 28 of the support shaft 81, and after swinging, the damper 8 is in a state as shown in FIG. In such a case, the small-diameter gear 64 of the transmission means 87 is moved in the C direction along with the oscillation of the oscillating body 82 and is separated from the large-diameter gear 62 of the transmission means 87, so that the rotation body 84 is rotated in the R1 direction. Therefore, resistance due to shearing of the fluid 85 does not occur.

  When the automobile seat 1 is lowered by the rotation of the connecting arm 14 in the D direction to change from the state shown in FIG. 11 to the state shown in FIG. 1, the swinging body 82 to which the rotation in the D direction is transmitted from the connecting arm 14. Is swung in the D direction around the axis 28 of the support shaft 81, and after swinging, the damper 8 is in a state as shown in FIG. In such a case, the small-diameter gear 64 of the transmission means 87 is moved in the D direction along with the oscillation of the oscillator 82, the large-diameter gear 62 of the transmission means 87 approaches and meshes with the large-diameter gear 62, and further the small-diameter When the gear 64 is moved in the D direction, the small diameter gear 64 pushes the large diameter gear 62 to move in the B direction, and the large diameter gear 62 to be moved is rotated in the R2 direction while traveling on the rack gear 63. Since the small-diameter gear 64 is rotated in the R1 direction by the rotation, rotation in the R1 direction occurs in the rotating body 84 to which the small-diameter gear 64 is fixed, and thus resistance due to shearing of the fluid 85 occurs. Here, like the transmission means 27, the transmission means 87 can increase the rotational speed of the small diameter gear 64 and can generate the shear resistance of the fluid 85 depending on the rotational speed.

  According to the damper 5 of the automobile seat 1 of this example, a gap 23 is formed between the oscillating body 22 that is oscillated by the operation of the automobile seat 1 and the oscillating body 22 that is rotatable with respect to the oscillating body 22. The oscillating body 24, the fluid 25 disposed in the gap 23, and the oscillation of the oscillating body 22 in the B direction are transmitted to the rotating body 24 as the rotational force of the oscillating body 24, while A transmission means 27 for releasing the transmission based on the swing of the direction. The transmission means 27 is fixed to the automobile seat 1 and the fixed body 61 is movable in the A and B directions. A large-diameter gear 62 that is held in the rack, a rack gear 63 that extends in the A and B directions and is provided on the fixed body 61 and meshes with the large-diameter gear 62, and a smaller diameter than the large-diameter gear 62. Are fixed to the rotating body 24 and the rocking body 22 is in the B direction. The large-diameter gear 62 approaches and meshes with the large-diameter gear 62 based on the swing, and the large-diameter gear 62 separates based on the swing in the A direction of the swing body 22 to release the engagement. Since the small-diameter gear 64 and the separation prohibiting body 65 that is provided on the rocking body 22 and prohibits the large-diameter gear 62 from being separated from the small-diameter gear 64 by a predetermined amount or more are provided. In contrast, the rotational speed of the small-diameter gear 64 can be further increased, and a shear resistance can be generated in the fluid 25 depending on the rotational speed of the small-diameter gear, and the gear ratio of the large-diameter gear 62 and the small-diameter gear 64 can be increased. Therefore, the reaction force of the large-diameter gear 62 can be increased, and thus the resistance to the slow operation of the automobile seat 1 is not increased so much while the resistance to the abrupt operation of the automobile seat 1 is increased rapidly. Letting Further, the transmission means 27 can be configured more easily and inexpensively, so that it is not necessary to interpose a so-called clutch mechanism or the like between the rotating body 24 and the small diameter gear 64, and the small diameter gear 64 can be more rotated. 24, the damper 5 itself can be downsized. In addition, since the damper 8 of the automobile seat 1 of the present example has the above-described configuration, the same effect as that of the damper 5 can be obtained.

  Note that the transmission means of the vehicle seat 1 of this example is fixed to the backrest 3 as shown in FIGS. 13 and 14, for example, as shown in FIGS. The connecting arm 11a rotatably attached to the guide arm 73 and the end portion 80a of the guide groove 73 are located below the center portion 79 and the end portion 80b, and the end portion 80b is located above the center portion 79 and the end portion 80a. Thus, the fixed body 61a fixed to the seat portion 2 may be provided, and when the fixed body 61a is provided, the small-diameter gear 64 moves from the end 80a side to the end 80b side. When moving in the B direction, the movement in the B direction based on the weight of the large diameter gear 62 does not occur, and the small diameter gear 64 meshes with the large diameter gear 62 and moves in the B direction while pushing the large diameter gear 62. First rotation of backrest 3 in direction B It can immediately cause resistance due to shear of the fluid 25 from.

It is a whole explanatory view of an example of an embodiment of the invention. It is explanatory drawing of the damper of the example shown in FIG. It is a cross-sectional explanatory drawing of the damper shown in FIG. FIG. 3 is a partially omitted explanatory diagram of the damper shown in FIG. 2. It is explanatory drawing of the other damper of the example shown in FIG. FIG. 6 is a cross-sectional explanatory view of another damper shown in FIG. 5. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the damper shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the damper shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the other damper of the example shown in FIG. It is whole explanatory drawing of the other example of embodiment of this invention. It is explanatory drawing of the damper of the example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automobile seat 2 Seat part 3 Backrest 5, 8 Damper 6 Chassis 7 Lift mechanism 21, 81 Support shaft 22, 82 Oscillator 23, 83 Gap 24, 84 Rotating body 25, 85 Fluid 26, 86 Lid 27, 87 Transmission Means 61, 61a Fixed body 62 Large-diameter gear 63 Rack gear 64 Small-diameter gear 65, 65a Non-separation body

Claims (7)

  An oscillating body that is oscillated by the operation of the automobile seat, a rotator that is rotatable with respect to the oscillating body and that forms a gap between the oscillating body, a fluid that is disposed in the gap, Transmission means for transmitting the oscillation in one oscillation direction of the oscillation body to the rotation body as the rotational force of the rotation body, and releasing the transmission based on the oscillation in the other oscillation direction of the oscillation body. The transmission means includes a stationary body fixed to the automobile seat, a large-diameter gear that is held by the stationary body so as to be movable in the same direction as the swinging direction of the swinging body, and extends in the same direction as the swinging direction. The rack gear is provided on the fixed body and meshed with the large-diameter gear, and has a smaller diameter than that of the large-diameter gear and is fixed to the rotating body. Based on this, the large-diameter gear approaches and meshes with the large-diameter gear, and the rocking body swings in the other rocking direction. A small-diameter gear that disengages the large-diameter gear when the large-diameter gear is separated, and a separation-inhibiting body that is provided on the rocking body and prohibits the large-diameter gear from separating a predetermined amount or more from the small-diameter gear. A damper for automobile seats.   2. The vehicle according to claim 1, wherein the fixed body is fixed to a seat portion of the automobile seat, and the swinging body is swung by rotating the seat back of the vehicle seat with respect to the seat portion. Damper for seat.   The fixed body is fixed to an automobile seat lift mechanism that connects the seat portion of the automobile seat to the chassis of the automobile so as to be movable up and down, and the swinging body is swung by the raising and lowering of the seat portion. 2. A damper for an automobile seat according to claim 1, wherein the damper is for automobile seats.   The fixed body is provided in a body that is adjacent to the rocking body, a gear housing that is defined in the body and that accommodates a large-diameter gear and a small-diameter gear, and a portion that defines a gear housing portion of the body. 4. The automobile seat damper according to claim 1, further comprising a guide groove that guides the large-diameter gear in the same direction as the swinging direction. 5.   The separation prohibiting body protrudes toward the fixed body and is provided on the swinging body, and is arranged on one side with respect to the swinging direction from the small diameter gear and sandwiches the large diameter gear with a gap between the small diameter gear. Based on the rocking motion of the rocking body in the other rocking direction, the large-diameter gear is slidably contacted to move the large-diameter gear in the same direction as the other rocking direction. 5. The above-described separation is prohibited, while the large-diameter gear is separated from the large-diameter gear on the basis of the swing in one swing direction of the swing body. 6. Damper for automobile seats.   The damper for an automobile seat according to any one of claims 1 to 5, wherein the fluid is a low-viscosity viscous material.   An automobile seat comprising the damper for an automobile seat according to any one of claims 1 to 6.

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