JP4433994B2 - 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 in one swing direction of the swing body are transmitted to the rotating body as a rotational force, while the transmission is canceled based on the swing in the other swing direction of the swing body. The transmission means includes: a fixed body fixed to the automobile seat; a rotating gear held by the fixed body so as to be movable in the same direction as the swinging direction of the swinging body; And a rack gear that is provided on the stationary body and meshes with the rotating gear, and the rotating gear approaches the rotating gear based on the swinging of the swinging body in one swinging direction. The rotating gear is disengaged based on the engagement of the rocking body in the other rocking direction. A rotation gear fixed to the rotating body so that the engagement is released, and a separation prohibiting means for prohibiting the separation of the rotation gear from the rotation gear beyond a certain distance. The means allows a protrusion provided on one of the oscillating body and the rotating gear and a movement of the protrusion in the same direction as the oscillating direction within the fixed distance, while the protrusion of the protruding part having the fixed distance or more is allowed. The protrusion is fitted so as to inhibit the movement, and a fitting hole or a fitting groove provided on the other of the swinging body and the rotating gear is provided.

  According to the damper for an automobile seat of the present invention, in particular, the transmission means is held in the fixed body so as to be movable in the same direction as the swinging direction of the swinging body, and in one swinging direction of the swinging body. The rotating body is moved so that the rotating gear approaches and meshes with the rotating gear based on the swing, and the rotating gear is separated based on the swing in the other swinging direction of the swinging body and the meshing is released. The rotational speed of the rotatable gear can be increased with respect to the swinging of the swinging body, and depends mainly on the rotational speed of the rotatable gear. Therefore, the shear force can be generated in the fluid and the reaction force of the rotating gear can be increased in relation to the gear ratio of the rack gear and the rotatable gear, so that the resistance against the slow operation of the automobile seat is reduced. Car seats while not increasing It is possible to increase the resistance to sudden operation rapidly. In addition, according to the damper for an automobile seat, in particular, the transmission means includes the rotation gear and the rotatable gear, and a separation prohibiting means for prohibiting the separation of the rotation gear beyond a certain distance from the rotatable gear. The separation prohibiting means allows a protrusion provided on one of the swinging body and the rotating gear and a movement of the protrusion in the same direction as the swinging direction within the predetermined distance, while exceeding the predetermined distance. Since the protrusion is fitted so as to inhibit the movement of the protrusion and the fitting hole or the fitting groove provided in the other of the swinging body and the rotating gear is provided, the transmission means Can be configured more easily and inexpensively, the need to intervene a so-called clutch mechanism or the like between the rotating body and the rotatable gear can be eliminated, and the rotatable gear can be brought closer to the rotating body. Downsizing itself Get Ri.

  In a preferable example of the damper for an automobile seat of the present invention, the protrusion is provided so as to protrude toward the oscillating body at the center of the rotating gear, and the fitting hole or the fitting groove is provided on the oscillating body. Yes. The fitting hole or the fitting groove in this preferable example may be composed of a long hole or a long groove provided in the oscillating body so as to extend in the same direction as the oscillating direction.

  In another preferable example of the damper for an automobile seat of the present invention, the protrusion is formed of a columnar body provided on the swinging body so as to protrude toward the rotation gear, and the fitting hole or the fitting groove is a central portion of the rotation gear. And a circular hole or groove having a diameter larger than that of the cylindrical body.

  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 pivoted (raised freely) with respect to the seat portion of the automobile seat is absorbed, and when the backrest is lifted or returned, the impact when the backrest is lifted, the backrest is unlocked This makes it possible to eliminate sudden jumping up due to sudden braking of the vehicle and rapid return due to sudden acceleration of the backrest that has been flipped up.

  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 preferable example of the damper for an automobile seat according to the present invention, the fixed body includes a main body adjacent to the swinging body, and a gear housing portion which is defined in the main body and houses the rotating gear and the rotatable gear. It has.

  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. Between the rotating body receiving portion 34 and the rotating body 64, which 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 rotating gear 64. And a protrusion 65 sandwiching the rotary gear 62 with a gap, and a protrusion that protrudes toward the fixed body 61 and is provided integrally with the main body 32 and is disposed on the A direction side of the rotatable gear 64. 65a. 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 rotation gear 62 held by the fixed body 61 movably in the A and B directions, and extends in the A and B directions to the fixed body 61. The rack gear 63 that is provided and meshed with the rotation gear 62 and the rotation gear 62 approach and mesh with the rotation gear 62 based on the oscillation of the oscillation body 22 in the B direction. A rotatable gear 64 fixed to the rotating body 24 so that the rotating gear 62 is released and the engagement is released based on the swing in the A direction, and a fixed distance L3 of the rotating gear 62 with respect to the rotatable gear 64. A separation prohibiting means 90 for prohibiting the above separation is provided.

  A fixed body 61 fixed to the seat portion 2 via the support shaft 21 is defined by a fan-shaped main body 71 adjacent to the rocking body 22, a main body 71, and a rotating gear 62 and a rotatable gear 64. And a gear housing portion 72 for housing the housing. The gear housing portion 72 is disposed adjacent to the rotating body 24.

  For example, as shown in FIG. 5, the rotary gear 62 has a gear main body 75 having a diameter larger than that of the rotatable gear 64, and the protrusion of the separation prohibiting means 90 protrudes from the surface of the gear main body 75 on the swinging body 22 side. The part 91 is fixed.

  The arc-shaped rack gear 63 is disposed in the gear housing portion 72 and extends from the end portion 80a to the end portion 80b of the main body 71 in the A and B directions and is fixed to the main body 71. The rotation is moved in the A and B directions. A rotational force in the R2 direction is applied to the gear 62.

  The rotatable gear 64 has a smaller diameter than the rotating gear 62 and is fixed to the rotating body 24 so that the rotation axis 45 is at the center. Such a rotatable 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 rotating gear 62, while the swinging body 22 is swinging in the B direction. Therefore, the rotary gear 62 is moved in the B direction via the rotating body 24 so as to approach the rotating gear 62. The rotational speed of the rotatable gear 64 may be about 6.55 times that of the rack gear 63.

  The fixed body 61 is configured such that the central portion 79 of the portion of the main body 71 where the rack gear 63 is provided is positioned below both end portions 80a and 80b of the portion of the main body 71 where the rack gear 63 is provided. It is fixed to. According to such a fixed body 61, when the rotatable gear 64 is moved in the B direction at a low speed from the end 80a side to the center portion 79, the rotatable gear 62 is rotated based on its own weight. Therefore, when the rotation of the backrest 3 in the B direction is low, if the rotation is low, no resistance is generated by shearing of the fluid 25, and the rotatable gear 64 is When moving in the B direction at a higher speed than the movement in the B direction based on the weight of the rotating gear 62 from the end 80a side to the center part 79, the fluid 25 is also in the initial stage of the B 3 in the B direction. Can cause resistance due to shearing. Further, according to the fixed body 61, when the rotatable 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 rotating gear 62 occurs. Since the rotatable gear 64 meshes with the rotating gear 62 and moves in the B direction while pushing the rotating gear 62, resistance due to the shearing of the fluid 25 can occur in the later rotation of the backrest 3 in the B direction. .

  The separation prohibiting means 90 allows the protrusion 91 provided at the center of the rotation gear 62 and the movement of the protrusion 91 in the A and B directions within the predetermined distance L3 with respect to the rocking body 22 while being not less than the predetermined distance L3. The protrusion 91 is fitted with a gap in the A and B directions so as to prohibit the movement of the protrusion 91 in the A and B directions with respect to the swinging body 22 and the fitting hole or the fitting provided in the swinging body 22 A long hole or a long groove 92 as a groove is provided, and by allowing the long hole or the long groove 92 to prohibit the movement of the protrusion 91 by a certain distance L3 or more, the rotatable gear 64 of the rotary gear 62 via the protrusion 91 is provided. The separation beyond a certain distance L3 is prohibited. Further, the separation prohibiting means 90 also prohibits excessive approach of the rotating gear 62 to the rotatable gear 64, thereby maintaining a suitable meshing state of the rotating gear 62 and the rotatable gear 64. obtain.

  The projecting portion 91 is composed of a cylindrical body 93 that is fixed to the surface of the rotating gear 62 on the side of the oscillating body 22 at one end and protrudes toward the oscillating body 22 and is rotated in the R2 direction with the rotation of the rotating gear 62. It has become.

  The long hole or long groove 92 is disposed on the B direction side of the rotatable gear 64 and is formed in the main body 32 so as to extend in the A and B directions. Both end portions 94 and 95 in the A and B directions of the long hole or long groove 92 are in contact with the protrusion 91 moved in the A and B directions together with the rotating gear 64, thereby prohibiting the movement of the protrusion 91 beyond a certain distance L3. It is like that. As shown in FIGS. 2 and 10, when the end 94 is in contact with the circumferential surface of the cylindrical body 93, the distance from the end 95 to the cylindrical body 93 is the same distance as the distance L3, and As shown in FIG. 8, when the end portion 95 is in contact with the circumferential surface of the cylindrical body 93, the distance from the end portion 94 to the cylindrical body 93 is the same distance as the distance L3.

  In addition, the long hole or the long groove 92 may be further provided on the A direction side of the rotatable gear 64. In such a case, for example, the arrangement of the rotating gear 62 is arranged on the B direction side of the rotatable gear 64. By simply changing from A to the A direction side, the oscillation in the A direction of the oscillating body 22 is transmitted to the rotator 24 as the rotational force in the R1 direction of the rotator 24 while the oscillation is transmitted by the oscillation in the B direction of the oscillating body 22 The configuration of the transmission means 27 can be easily changed so as to release

  For example, as shown in FIG. 6, the damper 8 includes a support shaft 81 fixed to the connecting portion 13, a swinging body 82 swinging in the C and D directions about the axis 28 of the support shaft 81, and a swinging motion. A rotating body 84 that forms a gap (not shown) similar to the gap 23 between the moving body 82 and a fluid (not shown) disposed in the gap between the swinging body 82 and the rotating body; The lid 86 attached to the rocking body 82 and the rocking motion of the rocking body 82 in the D direction are transmitted to the rotating body 84 as the rotational force of the rotating body 84 in the R1 direction, while the rocking body 82 rocks in the C direction. The transmission means 87 which cancels | releases the said transmission based on this is comprised.

  The support shaft 81, the swinging body 82, the rotating body 84, the lid body 86, and the transmission means 87 are configured in substantially the same manner as the support shaft 21, the swinging body 22, the rotating body 24, the fluid body 25, the lid body 26, and the transmission means 27, respectively. Therefore, the same reference numerals are given to the following drawings, and detailed description thereof will be omitted. The protrusion 91 of the transmission means 87 is fitted in a long hole or a long groove 92 disposed on the D direction side of the rotatable gear 64. Further, the fixed body 61 of the transmission means 87 has an end portion 80 b of the fixed body 61 positioned below the central portion 79 and the end portion 80 a of the fixed body 61, and an end portion 80 a of the fixed body 61 is the center of the fixed body 61. It is being fixed to the connection part 13 so that it may be located above the part 79 and the edge part 80b, and, by being fixed in this way, the rotatable gear 64 of the transmission means 87 is the edge part 80a side from the edge part 80b side. , The movement in the D direction based on the weight of the rotating gear 62 of the transmission means 87 does not occur, and the rotatable gear 64 meshes with the rotating gear 62 and pushes the rotating gear 62. However, since the coupling arm 14 is moved in the D direction, the resistance due to the shearing of the fluid can be generated immediately after the connection arm 14 is rotated in the D direction.

  The fluid of the damper 8 may be the same as that of the fluid 25, but is not necessarily the same. For example, the viscosity of silicon oil or the like set to a desired viscosity according to the weight of the automobile seat or the like. It may consist of a body.

  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, since the rotatable gear 64 is moved in the A direction along with the swing of the swinging body 22 and is separated from the rotating gear 62, the rotating body 24 is not rotated 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 rotatable gear 64 is moved in the B direction along with the oscillation of the oscillating body 22, the rotating gear 62 approaches and meshes with the rotating gear 62, and the rotatable gear 64 is further moved in the B direction. Accordingly, the rotary gear 62 is pushed by the rotary gear 64 to move in the B direction, and the rotary gear 62 to be moved is rotated in the R2 direction while traveling on the rack gear 63, and the rotary gear 64 is rotated in the R1 direction by this rotation. Therefore, rotation in the R1 direction occurs in the rotating body 24 to which the rotatable 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 rotating gear 62 to the rotatable gear 64, the rotating speed of the rotatable gear 64 can be increased, and the shear resistance of the fluid 25 is increased depending on the rotating 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 due to shearing of the fluid 25 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 rotatable 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 rotation gear 62 of the transmission means 87, so that the rotation body 84 is rotated in the R1 direction. Therefore, resistance due to fluid shearing 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 direction D about 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 rotatable gear 64 of the transmission means 87 is moved in the D direction along with the oscillation of the oscillating body 82, the rotation gear 62 of the transmission means 87 approaches and meshes with the rotation gear 62, and is further rotatable. When the gear 64 is moved in the D direction, the rotatable gear 64 pushes the rotating gear 62 to move it in the B direction, and the moved rotating gear 62 is rotated in the R2 direction while traveling on the rack gear 63. As a result, the rotatable gear 64 is rotated in the R1 direction, so that the rotating body 84 to which the rotatable gear 64 is fixed is rotated in the R1 direction, and thus resistance due to shearing of the fluid is generated. Here, similarly to the transmission means 27, the transmission means 87 can increase the rotation speed of the rotatable gear 64 and can generate the shear resistance of the fluid depending on the rotation 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 in the B direction of the oscillating body 25 are transmitted to the rotator 24 as a rotational force, while the oscillating body 22 is oscillated in the A direction. Transmission means 27 for releasing the transmission based on the transmission means 27. The transmission means 27 is fixed to the vehicle seat 1 and is held by the fixed body 61 so as to be movable in the A and B directions. The rotating gear 62, the rack gear 63 that extends in the A and B directions and is provided on the fixed body 61 and meshes with the rotating gear 62, and the rotating gear 62 based on the swinging of the swinging body 22 in the B direction. Approaches and meshes with the rotating gear 62 Based on the swinging of the moving body 22 in the A direction, the rotary gear 62 is separated to release the engagement, and the rotary gear 64 fixed to the rotary body 24 and the rotary gear 62 to the rotary gear 64 are disengaged. A separation prohibiting means 90 that prohibits separation beyond a certain distance L3 is provided. The separation prohibiting means 90 includes a protrusion 91 provided on the rotating gear 62, and A and B within a fixed distance L3 of the protrusion 91. While the projection 91 is fitted and the projection 91 is fitted in the swinging body 22 so as to prohibit the movement of the projection 91 in the A and B directions over a certain distance L3 while allowing the movement in the direction, Since the long hole or the long groove 92 as the fitting groove is provided, the rotational speed of the rotatable gear 64 can be further increased with respect to the swinging of the swinging body 22, and the rotation of the rotatable gear 64 is mainly performed. Depending on the rotational speed, the fluid 25 The cutting resistance can be generated, and the reaction force of the rotating gear 62 can be increased in relation to the gear ratio of the rack gear 63 and the rotatable gear 64, thus reducing the resistance against the slow operation of the automobile seat 1. While not increasing so much, the resistance against the abrupt operation of the automobile seat 1 can be increased abruptly, and the transmission means 27 can be configured more easily and inexpensively, between the rotating body 24 and the rotatable gear 64. Therefore, it is possible to eliminate the necessity of interposing a so-called clutch mechanism or the like, the rotatable gear 64 can be brought closer to the rotating body 24, and 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 the damper 5 can be obtained.

  The automobile seat 1 of this example is fixed to the backrest 3 and rotated in the A and B directions on the seat portion 2 as shown in FIGS. 13 and 14, for example, instead of the connecting arm 11 and the fixed body 61. The connecting arm 11a that is freely attached, and the seat portion 2 such that the end portion 80a is located below the central portion 79 and the end portion 80b and the end portion 80b is located above the central portion 79 and the end portion 80a. The fixed gear 61a may be provided, and when the fixed body 61a is provided, the rotatable gear 64 is moved in the B direction from the end portion 80a side to the end portion 80b side. In this case, the movement in the B direction based on the weight of the rotating gear 62 does not occur, and the rotatable gear 64 meshes with the rotating gear 62 and moves in the B direction while pushing the rotating gear 62. Immediately from the beginning of rotation It may cause resistance due to shearing of the body 25.

  Further, the damper 5 of the automobile seat 1 of the present example further includes elastic urging means 101 that elastically urges the rotating gear 62 toward the swinging body 22 in the direction A as shown in FIG. The elastic biasing means 101 may be in contact with the end portion 95 on the B direction side of the long hole or long groove 92 at one end and slide on the peripheral surface of the cylindrical body 93 via the sliding contact member 102 at the other end. You may have the compression spring 103 which contact | connects. According to such elastic urging means 101, when the oscillating body 22 is moved in the B direction, the rotating gear 62 and the rotatable gear 64 can be quickly meshed to reduce the resistance of the fluid 25 due to shearing. It can be generated from the initial stage of movement, and the meshing state of the rotary gear 62 and the rotatable gear 64 can be maintained more suitably.

  In addition, as shown in FIGS. 16 to 18, for example, as shown in FIGS. 16 to 18, the damper 5 of the automobile seat 1 in this example includes a protrusion 111 provided on the rocking body 22 and rotation of the protrusion 111. The protrusion 111 is fitted so as to allow movement in the A and B directions within a certain distance with respect to the gear 62, while prohibiting movement of the protrusion 111 in the A and B directions with respect to the rotating gear 62 over the certain distance. In addition, a separation prohibiting means 113 having a fitting hole or a circular hole or fitting groove 112 as a fitting groove provided in the rotating gear 62 may be provided. The protrusion 111 may be composed of a cylindrical body 114 provided on the rocking body 22 so as to protrude toward the rotation gear 62, and the circular hole or circular groove 112 is provided in the center of the rotation gear 62. The diameter may be larger than that of the cylindrical body 114. The center 115 of the circular hole or circular groove 112 of the separation prohibiting means 113 may be located on the rack gear 63 side away from the axis 28 than the rotation axis 45 of the rotatable gear 64. The shaft center 116 may be located closer to the rack gear 63 than the center 115 of the circular hole or circular groove 112. The protrusion 111 maintains the meshing state between the rotation gear 62 and the rack gear 63 even when the rotation gear 62 is slightly moved toward the shaft center 28 based on, for example, vibration of the automobile seat 1 itself. In consideration of the diameter of the circular hole or groove 112, the diameter of the cylindrical body 114, the meshing depth of the rotating gear 62 and the rack gear 63, the positioning may be provided on the rocking body 22.

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. FIG. 3 is an enlarged explanatory view mainly showing a rotary gear of the damper shown in FIG. 2. It is explanatory drawing of the other damper of the example 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 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. It is explanatory drawing mainly of the rocking | fluctuation body and elastic biasing means of the other damper of the example of embodiment of this invention. It is explanatory drawing mainly of the rocking | fluctuation body and separation | separation prohibition means of the other damper of the example of embodiment of this invention. FIG. 17 is an explanatory diagram mainly showing a rotation gear and a separation prohibiting means of still another damper shown in FIG. 16. FIG. 17 is an explanatory diagram of still another damper shown in FIG. 16.

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 Gap 24, 84 Rotating body 25 Fluid 26, 86 Lid 27, 87 Transmission means 61, 61a Fixed body 62 Rotating gear 63 Rack gear 64 Rotating gear 90, 113 Separation prohibiting means 91, 111 Protruding portion 92 Long hole or long groove 93, 114 Cylindrical body 112 Circular hole or circular groove

Claims (9)

  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 swing in one swing direction of the swing body to the rotating body as a rotational force, and releasing the transmission based on the swing in the other swing direction of the swing body; The transmission means includes a stationary body fixed to the automobile seat, a rotating gear held by the stationary body so as to be movable in the same direction as the swinging direction of the swinging body, and a fixed body extending in the same direction as the swinging direction. The rack gear that is provided and meshed with the rotating gear, and the rotating gear approaches and meshes with the rotating gear based on the swinging of one swinging direction of the swinging body and the other swinging of the swinging body. Based on the swing in the moving direction, the rotating gear is separated so that the engagement is released. A rotatable gear fixed to the body, and a separation prohibiting means for prohibiting the separation of the rotating gear with respect to the rotatable gear by a certain distance or more, wherein the separation prohibiting means is one of the swinging body and the rotating gear. And the protrusion is fitted so as to allow the protrusion to move in the same direction as the swinging direction within the predetermined distance, while prohibiting the movement of the protrusion beyond the predetermined distance. And a damper for an automobile seat provided with a fitting hole or a fitting groove provided on the other of the swinging body and the rotating gear.   2. The automobile seat damper according to claim 1, wherein the protrusion is provided at the center of the rotating gear so as to protrude toward the swinging body, and the fitting hole or the fitting groove is provided in the swinging body.   The damper for an automobile seat according to claim 2, wherein the fitting hole or the fitting groove is a long hole or a long groove provided in the swinging body so as to extend in the same direction as the swinging direction.   The protrusion is a cylindrical body provided on the swinging body so as to protrude toward the rotating gear, and the fitting hole or the fitting groove is provided at the center of the rotating gear and has a larger diameter than the cylindrical body. The damper for motor vehicle seats of Claim 1 which consists of a hole or a circular groove.   The fixed body is configured to be fixed to a seat portion of the automobile seat, and the oscillating body is configured to be oscillated by rotating the seat back of the automobile seat with respect to the seat portion. A damper for an automobile seat according to claim 1.   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. The automobile seat damper according to any one of claims 1 to 4, wherein the damper is for a vehicle seat.   The fixed body includes a main body adjacent to the oscillating body, and a gear housing portion which is defined in the main body and houses a rotating gear and a rotatable gear. The automobile seat damper described in the above item.   The damper for an automobile seat according to any one of claims 1 to 7, wherein the fluid is a low-viscosity viscous material.   An automobile seat comprising the automobile seat damper according to any one of claims 1 to 8.

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