JP4196566B2 - Damper for automobile seat and automobile seat mechanism equipped with this damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat, for example, a vehicle seat that can absorb the rotational energy of the return of the rear seat that is flipped up in the lateral direction to eliminate a sudden return of the rear seat. The present invention relates to an automotive damper and an automobile seat mechanism equipped with the damper.
[0002]
[Problems to be solved by the invention]
In automobiles, it has been proposed that the rear seat be flipped up laterally in order to widen the interior space, but when such a rear seat is flipped up laterally (in the case of lateral rotation in the upward direction) Even if a little large force is applied, the weight of the rear seat will act and the problem of crashing into the stopper will not occur so much. However, when returning to the original position (in the case of lateral rotation in the downward direction), it will be affected by the weight of the rear seat. The sound is suddenly lowered in the lateral direction and collides with a stopper or the like, producing an unpleasant loud sound. In order to slowly perform the lateral rotation of the rear seat in the lowering direction, it is preferable to use a damper that absorbs the energy of the lateral rotation. As such a damper, one using a fluid is known. A damper using such a fluid must be large in order to obtain a large damping force, and requires a large-scale seal for preventing fluid leakage. In particular, in order to secure a large in-vehicle living space, a damper for an automobile seat mechanism in which the backrest is rotated rearward with respect to the rear seat to extend the backrest relative to the rear seat and then the rear seat is flipped up laterally. Then, since it is necessary to attenuate a large rotational energy based on the total load of the backrest and the rear seat, it is difficult to obtain a desired large attenuation with a small damper simply using a fluid.
[0003]
The present invention has been made in view of the above points, and the object of the present invention is that it can obtain a large damping force and can be reduced in size, particularly by extending the backrest or folding the backrest, It is an object of the present invention to provide a damper suitable for an automobile seat in which the seat is flipped up in the lateral direction or the seat is rotated backward, and an automobile seat mechanism including the damper.
[0004]
[Means for Solving the Problems]
The damper for an automobile seat according to the first aspect of the present invention is fixed to a rotating body configured to transmit the rotation of the automobile seat and a chassis on which the automobile seat is rotatably installed. A fixing member configured to be formed, a gap forming member that is interposed between the rotating body and the fixing member and forms a gap in cooperation with one of the rotating body and the fixing member, and the gap forming member. In the rotation of the silicone-based unvulcanized rubber and the vehicle seat in one direction, the gap forming member and one of the rotating body and the fixing member that form a gap in cooperation with the gap forming member. In the meantime, relative rotation based on rotation in one direction is generated, while rotation in the other direction of the seat of the automobile is rotation that forms a gap in cooperation with the gap forming member and the gap forming member. One of the body and the fixing member; It is provided with a one-way clutch means so as not to cause relative rotation based on other direction of rotation between.
[0005]
According to the damper of the first aspect, since the damping function is obtained with the silicone-based unvulcanized rubber, there is no risk of wear, and a seal for preventing leakage can be omitted. Even in a small size, a large damping force can be easily obtained, and with one-way clutch means, in one direction of rotation of the seat of the automobile, for example, lateral flip-up of the seat or forward rotation of the seat, In order to prevent the damping function caused by the silicone-based unvulcanized rubber from being generated, the rotation of the vehicle seat in the other direction, for example, the lateral rotation of the seat back-down or the downward tilting rotation of the seat, Since the damping function is caused by the vehicle, it is possible to easily raise or lower the seat of the automobile, and to stop or turn the seat in the lateral direction or the backward tilting direction. There is no possibility that the loud unpleasant by the clash occurs.
[0006]
In the damper according to the first aspect, like the damper for an automobile seat according to the second aspect of the present invention, the rotating body is adapted to transmit a lateral rotation in the raising and lowering direction of the automobile seat, The fixing member is configured to be fixed to a chassis on which a vehicle seat is rotatably installed, and the one-way clutch means is a gap forming member in the lateral rotation in the vehicle seat lowering direction. And a rotating body that forms a gap in cooperation with the gap forming member, and a relative rotation based on a lateral rotation in the downward direction is generated between one of the rotating body and the fixing member that form a gap. In the lateral rotation, relative rotation based on the lateral rotation in the upward direction between the gap forming member and one of the rotating body and the fixed member that form a gap in cooperation with the gap forming member is performed. Even if it does n’t happen Like the damper for automobile seats according to the third aspect of the present invention, the rotating body is adapted to transmit the rotation of the automobile seat in the front-rear direction, and the fixing member is the automobile seat in the front-rear direction. The one-way clutch means cooperates with the gap forming member and the gap forming member in the rearward rotation of the automobile seat. The relative rotation based on the backward rotation is generated between one of the rotating body and the fixing member that forms the gap, and the gap forming member is used for the forward rotation of the automobile seat. In addition, relative rotation based on the forward rotation between one of the rotating body and the fixed member that form a gap in cooperation with the gap forming member may be prevented.
[0007]
A damper for an automobile seat according to a fourth aspect of the present invention includes a rotating body configured to transmit rotation of an automobile seat, and a gap forming member that forms a gap in cooperation with the rotating body. A silicone-based unvulcanized rubber disposed in the gap, and a fixing member that rotatably supports the gap forming member and is fixed to a chassis in which the automobile seat is rotatably installed In the rotation in one direction of the automobile seat, the gap forming member is rotated in one direction as the rotating body rotates in one direction through the silicone-based unvulcanized rubber, One-way clutch means for prohibiting rotation of the gap forming member connected to the other rotation of the rotating body via the silicone-based unvulcanized rubber in the other direction of rotation of the automobile seat in the other direction is provided. ing.
[0008]
According to the damper of the fourth aspect, as with the damper of the first aspect, since the damping function is obtained with the silicone-based unvulcanized rubber, there is no risk of wear, and leakage prevention is provided. It is possible to easily eliminate a large amount of sealing force even if it is light and small, and it is possible to easily obtain a large damping force. In order to prevent the damping function caused by, and the rotation of the other side of the automobile seat to cause the damping function caused by the silicone-based unvulcanized rubber, for example, the automobile seat jumps up or forwards. In addition to being able to easily return, there is no unpleasant loud noise caused by a collision with the stopper or the like in the lateral downward or downward tilting rotation of the seat.
[0009]
In the damper of the fourth aspect, like the damper for an automobile seat of the fifth aspect of the present invention, the rotating body is adapted to transmit the lateral rotation in the raising and lowering direction of the automobile seat, The fixing member is fixed to a chassis on which the automobile seat is rotatably installed, and the one-way clutch means is not silicone-based in lateral rotation in the raising direction of the automobile seat. The gap forming member is rotated with the rotation of the rotating body through the vulcanized rubber, while the rotating body is rotated through the silicone-based unvulcanized rubber in the lateral rotation of the automobile seat in the downward direction. Even if the rotation of the gap forming member connected to the vehicle is prohibited, like the damper for an automobile seat according to the sixth aspect of the present invention, the rotating body transmits the rotation of the automobile seat in the front-rear direction. It is supposed to be The fixing member is adapted to be fixed to a chassis in which the seat of the automobile is rotatably installed in the front-rear direction, and the one-way clutch means is configured to rotate the rear of the automobile seat in the rear direction. The gap forming member is rotated with the rotation of the rotating body via the silicone-based unvulcanized rubber, while the rotating body via the silicone-based unvulcanized rubber is used for the forward rotation of the automobile seat. The rotation of the gap forming member connected to the rotation may be prohibited.
[0010]
In the damper for automobile seats according to the seventh aspect of the present invention, in the damper according to any one of the first to sixth aspects, the gap forming member is rotatable to at least one of the rotating body and the fixed member. It is supported.
[0011]
Note that if the gap forming member is rotatably supported by both the rotating body and the fixed member, the gap forming member is supported more firmly, and a damper with no gap variation can be obtained.
[0012]
In the damper for an automobile seat according to the eighth aspect of the present invention, in the damper according to any one of the first to seventh aspects, the gap forming member has a cylindrical outer peripheral surface, and the one-way clutch means The one end is fixed to the rotating body or the fixed member, the other end is a free end on the cylindrical outer peripheral surface of the gap forming member, and the cylindrical shape of the gap forming member is between one end and the other end. A coil spring wound around the outer peripheral surface is provided.
[0013]
According to the damper of the eighth aspect, since the one-way clutch means includes the coil spring wound around the cylindrical outer peripheral surface of the gap forming member, the diameter and diameter of the coil spring are reduced. With the one-way clutch action, the rotation of the vehicle seat in one direction prevents the damping function caused by the silicone-based unvulcanized rubber, and the other rotation of the vehicle seat prevents the silicone-based unvulcanized rubber. As a result, the vehicle seat can be easily flipped up or returned forward by a very simple mechanism. It is possible to prevent an unpleasant loud sound caused by a collision with a stopper or the like.
[0014]
In the present invention, the rotating body preferably includes a shaft portion and a cylindrical portion concentric with the shaft portion, like the damper for an automobile seat according to the ninth aspect thereof, where a gap forming member is provided. Includes a main body slidably contacting the shaft portion of the rotating body, a cylindrical portion concentric with the main body, and a lid body screwed to the cylindrical portion. In such a damper for automobile seats, preferably, as in the damper for automobile seats according to the tenth aspect of the present invention, a spline is formed on the outer peripheral surface of the cylindrical portion of the rotating body. Like the damper for automobile seats of the eleventh aspect of the invention, the lid is screwed to the outer peripheral surface or the inner peripheral surface of the cylindrical portion of the gap forming member, and further the twelfth aspect of the present invention. As in the automobile seat damper, a seal member is interposed between the lid and the cylindrical portion of the rotating body.
[0015]
In the present invention, the silicone-based unvulcanized rubber may have a plasticity of 30 to 420 as in the damper for automobile seats of the thirteenth aspect. It has a plasticity of 60 to 320, like the damper for automobile seats of the fourteenth aspect, more preferably from 160 like the damper for automobile seats of the fifteenth aspect of the present invention. It has a plasticity of 320.
[0016]
The plasticity of the silicone-based unvulcanized rubber in the present invention is a value measured with a William plasticity meter standardized by ASTM or the like. Specifically, the diameter is about 1.43 cm between two upper and lower parallel plates. The height of the silicone-based unvulcanized rubber after being pressed for 3 minutes after pressing with a 5 kg load at 70 ° C to 100 ° C with a cylindrical shape of 1.27 cm in height and sandwiching 2 cc of silicone-based unvulcanized rubber (Mm / 100).
[0017]
In the present invention, the silicone-based unvulcanized rubber only needs to have a plasticity of 30 to 420 as described above. However, if the silicone-based unvulcanized rubber has a plasticity of less than 30, the silicone-based unvulcanized rubber easily flows and is disposed in the gap. In addition to requiring a sufficient seal for preventing leakage of the silicone-based unvulcanized rubber, a large damping force cannot be expected, and if the plasticity is greater than 420, the gap forming member and the gap The rotating body that forms a gap in cooperation with the forming member and the contact with one of the contact surfaces of the fixed member almost disappear, and the rotating body that forms a gap in cooperation with the gap forming member and One of the fixing member and the rotating member and the fixing member that form a gap in cooperation with the gap forming member with respect to the silicone-based unvulcanized rubber in relative rotation with each other. Sliding Therefore, it is difficult to obtain a substantial damping force due to deformation of the silicone-based unvulcanized rubber, and in order to prevent slippage, the gap forming member that contacts the silicone-based unvulcanized rubber and the gap forming member cooperate with each other. Even if the silicone-based unvulcanized rubber having a plasticity higher than 420 is extremely brittle, even if one surface of the rotating body and the fixing member forming the gap is used as an uneven surface to grip the silicone-based unvulcanized rubber, The silicone-based unvulcanized rubber is easily sheared (divided) in the relative rotation of one of the gap forming member and the rotating body and the fixed member that form a gap in cooperation with the gap forming member, This also makes it impossible to obtain a damping force based on the deformation of the silicone-based unvulcanized rubber.
[0018]
Further, the silicone-based unvulcanized rubber is filled in a gap between the gap forming member and one of the rotating body and the fixed member. If the plasticity is greater than 420, the silicone-based unvulcanized rubber rotates with the gap forming member. It becomes extremely difficult to fill the gap between one of the body and the fixing member with the silicone-based unvulcanized rubber without a cavity (unfilled portion), and the gap is formed after filling with the silicone-based unvulcanized rubber. If a cavity is formed between one of the member, the rotating body, and the fixed member and the silicone-based unvulcanized rubber, there is a possibility that desired attenuation cannot be obtained.
[0019]
In view of the necessity of such a seal and the magnitude of damping force obtained, conformability, brittleness, ease of filling, durability, and the like, the plasticity of the silicone-based unvulcanized rubber is preferably 60 as described above. To 320, more preferably 160 to 320. When the plasticity is 60 or more, the fluidity of the silicone-based unvulcanized rubber is almost lost, and leakage of the silicone-based unvulcanized rubber can be prevented with a simple sealing mechanism. When the plasticity is 160 or more, the sealing mechanism Can be omitted, and a relatively large damping force can be obtained. On the other hand, when the plasticity of the silicone-based unvulcanized rubber is higher than 420, the compatibility with one of the contact surfaces of the gap forming member, the rotating body, and the fixed member is lost as described above, and the silicone-based unvulcanized rubber becomes brittle. In the silicone-based unvulcanized rubber having a plasticity of 320 or less, the compatibility with one contact surface of the gap forming member and the rotating body and the fixing member is improved. In the relative rotation between the gap forming member and one of the rotating body and the fixing member, the silicone-based non-addition is not performed without sliding so much against the contact surface of the gap forming member and one of the rotating body and the fixing member. Deformation of the vulcanized rubber makes it easy to obtain the desired damping, and the brittleness disappears, and it is preferable according to the relative rotation between the gap forming member and one of the rotating body and the fixed member. A situation where the silicone-based unvulcanized rubber is sheared even if one of the gap forming member and the rotator and the fixed member that are deformed to form the uneven surface for gripping the silicone-based unvulcanized rubber is used. Can be avoided.
[0020]
In the present invention, the silicone-based unvulcanized rubber preferably has the plasticity as described above. Instead of such plasticity, the damper for automobile seats according to the sixteenth aspect is used. It may have a Mooney viscosity of 10 to 150 ML 1 + 4 (100 ° C.), but preferably 36 to 72 ML 1 + 4 (as in the damper for automobile seats of the seventeenth aspect of the present invention. Having a Mooney viscosity of 66 to 72 ML 1 + 4 (100 ° C.), such as a damper for an automobile seat according to the eighteenth aspect of the present invention. Also good.
[0021]
Similar to the silicone-based unvulcanized rubber having the above-described plasticity, the silicone-based unvulcanized rubber having a Mooney viscosity smaller than 10 ML 1 + 4 (100 ° C.) is easy to flow and is disposed in the gap. With silicone-based unvulcanized rubber having a Mooney viscosity exceeding 150 ML 1 + 4 (100 ° C.), a sufficient damping force cannot be expected, and a sufficient seal for preventing leakage from unvulcanized rubber is required. In addition, there is almost no familiarity with one contact surface of the gap forming member and the rotating body and the fixing member that form a gap in cooperation with the gap forming member, and the gap forming member and the gap forming member cooperate with each other. The gap forming member and the gap formation with respect to the silicone-based unvulcanized rubber in the relative rotation of one of the rotating body and the fixed member forming the gap One of the rotating body and the fixed member that forms a gap in cooperation with the member slips, and it becomes difficult to obtain a substantial damping force due to the deformation of the silicone-based unvulcanized rubber. The gap-forming member in contact with the silicone-based unvulcanized rubber, and the silicone-based unvulcanized rubber is gripped with one surface of the rotating member and the fixing member forming the gap in cooperation with the gap-forming member as an uneven surface. However, since the silicone-based unvulcanized rubber having a Mooney viscosity larger than 150 ML 1 + 4 (100 ° C.) is extremely brittle, among the gap forming member, the rotating body and the fixing member that form a gap in cooperation with the gap forming member. The silicone-based unvulcanized rubber is easily sheared (divided) in one relative rotation of each other, and this also reduces the damping force based on the deformation of the silicone-based unvulcanized rubber. In view of the necessity of such a seal and the magnitude of damping force obtained, conformability, brittleness, ease of filling, durability, and the like, the silicone-based unvulcanized rubber is preferably 36 as described above. Has a Mooney viscosity of from 66 to 72 ML 1 + 4 (100 ° C.), more preferably from 66 to 72 ML 1 + 4 (100 ° C.).
[0022]
In the present invention, the silicone-based unvulcanized rubber is preferably made of a silicone-modified ethylene propylene rubber like the damper for an automobile seat of the nineteenth aspect.
[0023]
When the silicone-based unvulcanized rubber is made of silicone-modified ethylene propylene rubber, it is possible to provide a preferable damper for an automobile seat having excellent durability and weather resistance.
[0024]
In the present invention, the gap forming member and one of the rotating body and the fixing member may have an uneven surface in contact with the silicone-based unvulcanized rubber. The uneven surface is formed by the gap forming member and the rotating body. In addition, in relative rotation with one of the fixing members, slipping of the silicone-based unvulcanized rubber in the vicinity of the uneven surface with respect to the uneven surface may be prevented. The uneven surface may be embodied by discretely arranged protrusions or grooves, or continuous protrusions or grooves, but may be embodied by a pear-like or wrinkled uneven surface.
[0025]
Such a concavo-convex surface functions to grip the silicone-based unvulcanized rubber in the vicinity of the concavo-convex surface, so that the relative clearance between the gap forming member and one of the rotating body and the fixed member is reduced. The silicone-based unvulcanized rubber can be prevented from slipping between one of the forming member, the rotating body, and the fixed member and the silicone-based unvulcanized rubber, and the silicone-based unvulcanized rubber is caused to undergo desired plastic deformation. Can absorb the target energy. As described above, the silicone-based unvulcanized rubber, the gap forming member in contact with the rubber, and one surface of the rotating body and the fixing member are well adapted to each other. In the case where slip does not occur between the silicone-based unvulcanized rubber or the slip is allowed, a smooth surface may be used without forming such an uneven surface.
[0026]
An automobile seat mechanism according to a first aspect of the present invention is provided with the damper according to any one of the aspects described above, a seat provided to be rotatable with respect to a chassis of the automobile, and a rotatable with respect to the seat. And a backrest.
[0027]
According to the automobile seat mechanism of the first aspect, since the damping function is obtained with the silicone-based unvulcanized rubber, the effect of the damper can be obtained, and the seat, for example, the rear seat A sudden return or a sudden backlash can be eliminated. The damper and the vehicle seat mechanism according to any of the above aspects of the present invention can be applied to any vehicle seat such as a front seat and a rear seat, but preferably applied to a rear seat.
[0028]
In the automobile seat mechanism according to the first aspect, even if the backrest is provided so as to be pivotable rearward with respect to the seat as in the automobile seat mechanism according to the second aspect of the invention, Like the automobile seat mechanism of this aspect, it may be provided so as to be rotatable forward with respect to the seat.
[0029]
Next, the present invention and its embodiments will be described with reference to preferred examples shown in the drawings. The present invention is not limited to these examples.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5, the vehicle seat mechanism 1 of the present example is free to rotate in the direction of the horizontal rotation R1, ie, the horizontal rotation in the up-and-down direction with respect to the vehicle seat damper 2 and the vehicle chassis. , A backrest 4 provided to be rotatable in the rearward direction R2 with respect to the rear seat 3, and a leg provided to be rotatable in the lateral direction R3 with respect to the rear seat 3. 5.
[0031]
The damper 2 is for a rotating body 11 to which the lateral rotation R1 of the rear seat 3 of the automobile is transmitted, and a chassis in which the rear seat 3 of the automobile is rotatably installed in the direction of the lateral rotation R1. A fixing member 12 that is fixed, and a gap 13 that is interposed between the rotating body 11 and the fixing member 12 in cooperation with the rotating body 11 in this example. Forming a gap forming member 14, a silicone-based unvulcanized rubber 15 disposed in the gap 13, and a lateral rotation R 1 in the downward direction of the rear seat 3 of the automobile (the rear seat 3 being in its original position shown in FIGS. 4 and 5) In the downward rotation), relative rotation based on the lateral rotation R1 is caused between the gap forming member 14 and the rotating body 11 forming the gap 13 in cooperation with the gap forming member 14, How to raise the rear seat 3 of a car In the lateral rotation R1 (the flip-up rotation that brings the rear seat 3 to the position shown in FIG. 6), the clearance between the gap forming member 14 and the rotating body 11 that forms the gap 13 in cooperation with the gap forming member 14 And a one-way clutch means 16 for preventing relative rotation based on the lateral rotation R1.
[0032]
The rotating body 11 is disposed concentrically with the disc portion 21, a columnar shaft portion 22 formed integrally with the disc portion 21, and outside the shaft portion 22. A cylindrical portion 23 formed integrally with the disc portion 21, and a cylindrical outer shaft portion 24 integrally formed with the disc portion 21 on the opposite side of the shaft portion 22. Splines 25 are formed on the cylindrical outer peripheral surface of the plate portion 21 and a part of the outer peripheral surface 27 of the cylindrical portion 23, and each of the inner peripheral surface 26 and the outer peripheral surface 27 of the cylindrical portion 23 has an annular shape. Steps 28 and 29 are formed.
[0033]
The fixing member 12 includes an annular portion 41, a cylindrical shaft portion 42 formed integrally with the annular portion 41, an outer portion of the shaft portion 42, concentrically with the shaft portion 42, and the annular portion 41. And a mounting plate portion 46 formed integrally with the cylindrical portion 43 and having a through hole 45 for inserting the fixing bolt 44. An annular recess 47 is formed on one surface of the portion 41.
[0034]
The gap forming member 14 is disposed concentrically with the main body 51 outside the main body 51 and concentrically with the main body 51 slidably contacting the shaft portion 22 of the rotating body 11 and the shaft portion 42 of the fixing member 12. And an outer cylindrical portion 52 formed integrally with the cylindrical portion 52 and a cylindrical lid 55 screwed to the cylindrical portion 52 via a screw portion 54 on an inner peripheral surface 53 of the cylindrical portion 52. .
[0035]
The main body 51 is arranged concentrically with the central shaft portion 57 that is in close contact with the cylindrical inner peripheral surface 56 of the shaft portion 42 of the fixing member 12 in a slidable manner and the central shaft portion 57 outside the central shaft portion 57. An inner cylindrical portion 58 formed integrally with the central shaft portion 57, and an annular portion 59 formed integrally with the cylindrical portion 58 and the cylindrical portion 52. One end of the central shaft portion 57 is fitted with a retaining ring 60 for preventing the gap forming member 14 from coming off from the fixing member 12 in the axial direction, and the cylindrical portion 58 has an outer peripheral surface. 61 has an annular stepped portion 62 corresponding to the stepped portion 28 and is in close contact with the peripheral surface 63 of the tip portion of the shaft portion 22 and the outer peripheral surface 69 of the shaft portion 42 in a slidable manner. The cylindrical portion 52 has an annular step portion 65 corresponding to the step portion 29 on its inner peripheral surface 53 and its outer peripheral surface. 3 is in close contact with the inner peripheral surface 66 of the cylindrical portion 43 in a slidable manner. Thus, the gap forming member 14 has a peripheral surface 63 at the distal end portion of the shaft portion 22 at the cylindrical portion 58. And the slidable contact with the outer peripheral surface 69 of the shaft portion 42, the slidable contact with the inner peripheral surface 56 of the shaft portion 42 at the central shaft portion 57, and the inside of the cylindrical portion 43 at the cylindrical portion 52. By slidable contact with the peripheral surface 66, the rotary body 11 and the fixed member 12 are supported so as to be rotatable in the lateral direction R 1 around the axis X.
[0036]
The cylindrical lid 55 is screwed to the inner peripheral surface 53 of the cylindrical portion 52 at the threaded portion 54 of the cylindrical outer peripheral surface, and the outer peripheral surface 27 of the cylindrical portion 23 with the cylindrical inner peripheral surface 68. The lid 55 has an annular projection 32 fitted in an annular recess 31 formed in the cylindrical portion 23 of the rotating body 11. The rotating body 11 is prevented from coming out of the gap forming member 14 in the axial direction by fitting the protrusion 32 into the recess 31.
[0037]
The gap 13 is formed between the tube portion 58 and the shaft portion 22 disposed inside the tube portion 58, between the tube portion 58 and the tube portion 23 disposed outside the tube portion 58, and between the tube portion 52 and the tube portion. 52 is formed between the cylindrical portion 23 arranged inside 52, between the disc portion 21 and the cylindrical portion 58, and between the annular portion 59 and the cylindrical portion 23.
[0038]
Mooney viscosity of 10 to 150 ML 1 + 4 (100 ° C.), preferably Mooney viscosity of 36 to 72 ML 1 + 4 (100 ° C.), more preferably 66 to 72 ML 1 + 4 (100 ° C.), even more specifically substantially A silicone-based unvulcanized rubber 15 having a Mooney viscosity of 70 ML 1 + 4 (100 ° C.) and made of silicone-modified ethylene propylene rubber is filled in the gap 13 in close contact with the rotating body 11 and the gap forming member 14.
[0039]
In the lateral rotation R1 in the raising direction of the rear seat 3 of the automobile, the gap forming member 14 is rotated in the direction of the lateral rotation R1 with the rotation of the rotating body 11 through the silicone-based unvulcanized rubber 15. On the other hand, in the lateral rotation R1 in the lowering direction of the rear seat 3 of the automobile, the one-way clutch of the present example prohibiting the rotation of the gap forming member 14 connected to the rotation of the rotating body 11 via the silicone-based unvulcanized rubber 15. The means 16 has one end 71 fixed to the cylindrical portion 43 of the fixing member 12, and the other end 72 becomes a free end on the cylindrical outer peripheral surface 73 of the cylindrical portion 52 of the gap forming member 14. A coil spring 74 wound between the other end 72 and in contact with the outer peripheral surface 73 is provided.
[0040]
In the coil spring 74, the rotating body 11 is rotated in the same direction by the lateral rotation R1 in the raising direction of the rear seat 3 of the automobile, and the gap forming member 14 is rotated in the same direction via the silicone-based unvulcanized rubber 15. Then, as a result of being wound with a winding direction in which the diameter is expanded at a portion wound in contact with the outer peripheral surface 73, the clearance forming member 14 is allowed to rotate in the same direction, and the rotating body 11 And the gap forming member 14 are prevented from rotating relative to each other in the direction of the lateral rotation R1 around the axis X, and thus the automotive unvulcanized rubber 15 is sheared and deformed. While the resistance against the lateral rotation R1 in the raising direction of the rear seat 3 is prevented, the rotating body 11 is rotated in the same direction by the lateral rotation R1 in the lowering direction of the rear seat 3 of the automobile, so that the gap forming member 14 becomes silicone. System unvulcanized rubber 15 Then, when it is attempted to rotate in the same direction, the gap forming member 14 is wound in the same direction as a result of being wound in such a winding direction that the diameter is reduced at the portion wound in contact with the outer peripheral surface 73. Rotation is prohibited, and relative rotation in the direction of the lateral rotation R1 about the axis X is caused between the rotating body 11 and the gap forming member 14, and thus the silicone-based unvulcanized rubber 15 A resistance against lateral rotation R1 in the downward direction of the rear seat 3 of the automobile due to shear deformation of the vehicle is generated, and energy of the lateral rotation R1 in the downward direction of the rear seat 3 is partially absorbed by the silicone-based unvulcanized rubber 15. It has become.
[0041]
The rear seat 3 is attached to a base 81 fixed to the chassis of the automobile via the damper 2 and the hinge mechanism 82 so as to be rotatable in the direction of the lateral rotation R1, and thus the rear seat 3 is interposed via the base 81. It is provided so as to be rotatable in the direction of lateral rotation R1 with respect to the chassis of the automobile.
[0042]
The hinge mechanism 82 is connected to the bearing member 83 fixed to the base 81 and, at one end portion 84, to one bearing portion 85 of the bearing member 83 via a shaft member 86 so as to be rotatable in the direction of lateral rotation R1. The other end portion 87 is splined to one arm member 88 fixed to the rear seat 3 and the one end portion 89 to the cylindrical portion 23 of the rotating body 11 of the damper 2 having the spline 25 formed on the outer peripheral surface. The other end 90 has the other arm member 91 fixed to the rear seat 3.
[0043]
The outer shaft portion 24 of the rotating body 11 of the damper 2 is supported by the other bearing portion 92 of the bearing member 83 so as to be rotatable in the direction of the lateral rotation R1, and the mounting plate portion 46 of the fixing member 12 of the damper 2 is supported. Is fixed to a mounting portion 93 of a bearing member 83 that bridges the bearing portion 85 and the bearing portion 92 via a fixing bolt 44.
[0044]
The rotating body 11 of the damper 2 is rotated in the same direction through spline coupling with the one end 89 of the arm member 91 in the spline 25 when the rear seat 3 is rotated in the direction of the lateral rotation R1. It has become.
[0045]
The backrest 4 is attached to the rear seat 3 via a known hinge mechanism 95 (see FIG. 6) so as to be rotatable in the rearward direction R2 with respect to the rear seat 3. The leg 5 is also connected via a known hinge mechanism 96. The rear seat 3 is attached so as to be rotatable in the lateral direction R3. Since the locking mechanisms and the like of the hinge mechanisms 95 and 96 are known, a detailed description thereof will be omitted.
[0046]
According to the above-described automobile seat mechanism 1 having the damper 2, as shown in FIG. 6, after the backrest 4 is rotated in the rear direction R2, the rear seat 3 is rotated in the upward direction in the lateral rotation R1, and further, the leg By rotating 5 in the lateral direction R3 with respect to the rear seat 3, a large in-car living space can be provided.
[0047]
According to the automobile seat mechanism 1, in the lateral rotation R <b> 1 in the raising direction of the rear seat 3, the rotating body 11 and the gap forming member 14 are also rotated in the same direction, and a damping function by the silicone-based unvulcanized rubber 15 is generated. Therefore, the rear seat 3 can be easily flipped up in the lateral direction, and the lateral rotation R1 in the downward direction of the rear seat 3 is prohibited by the coil spring 74 from rotating in the same direction by the coil spring 74. Thus, relative rotation in the direction of the lateral rotation R1 is caused between the rotating body 11 and the gap forming member 14, and shear deformation is caused in the silicone-based unvulcanized rubber 15, so that the rear seat 3 Since the rotational energy is absorbed by the shear deformation of the silicone-based unvulcanized rubber 15, it is possible to avoid the lateral rotation R <b> 1 in the direction in which the rear seat 3 is suddenly lowered. Obtained eliminating the intense return, it can eliminate the occurrence of unpleasant loud noise due to clash of the stopper and the like.
[0048]
According to the damper 2, since the damping function is obtained by shear deformation of the silicone-based unvulcanized rubber 15, there is no risk of wear, and a seal for preventing leakage can be omitted. In addition, a large damping force can be easily obtained even with a light weight and a small size, and since the gap forming member 14 is rotatably supported by the rotating body 11 and the fixed member 12, the gap forming member 14 is firmly supported. Thus, the damper 2 without the fluctuation of the gap 13 can be obtained.
[0049]
In the damper 2 described above, the lid body 55 is provided by being screwed to the inner peripheral surface 53 of the cylindrical portion 52 of the gap forming member 14, but instead of this, as shown in FIG. A threaded portion 97 is formed on the outer peripheral surface 73 of the portion 52, the lid body 55 is threadedly engaged with the outer peripheral surface 73 of the cylindrical portion 52 by the threaded portion 97, and the lid body 55 is connected to the cylindrical portion 52 of the gap forming member 14. The above-described damper 2 may not be provided with a sealing member for preventing leakage of the silicone-based unvulcanized rubber 15, but for example, as shown in FIG. An annular seal member 98 such as an O-ring is interposed between the inner peripheral surface 68 of the lid 55 and the outer peripheral surface 27 of the cylindrical portion 23, so that the silicone-based unvulcanized rubber 15 outside the damper 2 from the gap 13. You may make it prevent the leak to.
[0050]
In the above, the lateral rotation R1 of the rear seat 3 is transmitted to the rotating body 11 and the fixing member 12 is fixed to the mounting portion 93. Instead, the lateral rotation R1 of the rear seat 3 is fixed to the fixing member 12. In this case, the fixing member 12 becomes the rotating body, the rotating body 11 becomes the fixing member, and the one-way clutch means 16 The coil spring 74 is wound in such a manner that one end 71 is fixed to the rotating body and the other end 72 is a free end on the cylindrical outer peripheral surface 73 of the gap forming member 14 to obtain the one-way clutch function. Thus, it is wound around the cylindrical outer peripheral surface 73 of the gap forming member 14 between the one end 71 and the other end 72.
[0051]
Further, the above is an example of the automobile seat mechanism 1 in which the rear seat 3 is rotatably installed in the direction of the lateral rotation R1, but instead, the rear seat 3 is moved in the front-rear direction as shown in FIGS. A damper 2 may be used in the automobile seat mechanism 1 that is rotatably installed in R3.
[0052]
In the automobile seat mechanism 1 shown in FIGS. 9 and 10, the damper 2 is accommodated in the side frame 101, and the fixing member 12 of the damper 2 has the mounting plate portion 46 attached to the side frame 101 or the floor board 102 of the automobile. The rotating body 11 is fixed to the chassis of the automobile, and the rotating body 11 is replaced by a spline 103 instead of the cylindrical outer peripheral surface of the disk portion 21 and a part of the spline 25 of the outer peripheral surface 27 of the cylindrical portion 23. The outer shaft portion 24 formed on the outer peripheral surface is splined to the hole 107 in the other end 106 of the seat bracket 105 fixed to the rear seat 3 at one end 104, and the rotation of the rear seat 3 in the front-rear direction R3 is transmitted. In addition, the rotating body 11 is inserted into a hole 111 formed in the side frame 101 and has a disc portion 21 having a smooth outer peripheral surface. By a part of the fine tubular member 23 is supported rotatably in the front-rear direction R3 to the side frame 101, the backrest 4 is provided rotatably in a forward direction R4 relative rear seat 3. The other seat bracket 116 fixed to the rear seat 3 at one end 115 is rotatably supported at the other end 117 via the shaft or the like on the other side frame (not shown) of the automobile in the front-rear direction R3. Yes.
[0053]
In the automobile seat mechanism 1 shown in FIGS. 9 and 10, after the backrest 4 is rotated in the front direction R4 and superimposed on the rear seat 3 (after folding), the rear seat 3 is rotated rearward in the front-rear direction R3. After being further rotated in the downward direction and accommodated in a recess 121 formed in the floor plate 102 of the automobile, a large in-car living space can be provided as shown in FIG. In this state, the rear seat 3 is rotated in the upward direction so as to be taken out from the recess 121, and then is rotated forward in the front-rear direction R3 so as to contact the stopper 122 attached to the side frame 101. Thereafter, the backrest 4 is moved. It can be restored by turning.
[0054]
In the automobile seat mechanism 1 shown in FIGS. 9 and 10, the coil spring 74 is reduced in diameter in the rearward rotation including the lowering direction in the front-rear direction R3 of the rear seat 3, and the front including the raising direction in the front-rear direction R3 of the rear seat 3. In this example, the one-way clutch means 16 is configured such that the gap forming member 14 and the rotating body 11 are rotated in the rearward direction R3 of the rear seat 3 in the rearward direction. Relative rotation based on the backward rotation including the lowering direction in the front-rear direction R3, while the forward rotation including the raising direction in the front-rear direction R3 of the rear seat 3 causes the gap forming member 14 and the rotating body to rotate. In other words, in order to prevent relative rotation based on the forward rotation including the raising direction in the front-rear direction R3 between the rear seat 3 and the rear seat 3 in the front-rear direction R3. In the forward rotation including the direction, the gap forming member 14 is rotated with the rotation of the rotating body 11 via the silicone-based unvulcanized rubber 15, while the lowering direction is set in the front-rear direction R 3 of the rear seat 3. In the backward rotation including the rotation of the gap forming member 14 connected to the rotation of the rotating body 11 through the silicone-based unvulcanized rubber 15, the rotation is prohibited.
[0055]
In the automobile seat mechanism 1 shown in FIGS. 9 and 10, the damper 2 is housed in the side frame 101. Alternatively, the damper 2 may be installed outside the side frame 101, or on the other side of the seat bracket 116. Alternatively, a damper 2 may be installed.
[0056]
【The invention's effect】
According to the present invention, a large damping force can be obtained and the size can be reduced, and in particular, the backrest is extended or the backrest is folded, and then the seat is flipped up laterally or the seat is rotated backward. It is possible to provide a damper suitable for an automobile seat and an automobile seat mechanism including the damper.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of an example of a preferred embodiment of a damper for an automobile seat according to the present invention.
FIG. 2 is a left side explanatory view of the example shown in FIG.
3 is a cross-sectional explanatory view taken along the line III-III of the example shown in FIG.
FIG. 4 is a perspective view of an example of an automobile seat mechanism using the example shown in FIG.
5 is a perspective view with a part cut away in the example shown in FIG. 4; FIG.
6 is an operation explanatory diagram of the example shown in FIG. 4;
FIG. 7 is a cross-sectional explanatory view of another example of a preferred embodiment of the present invention.
FIG. 8 is a cross-sectional explanatory view of still another example of the preferred embodiment of the present invention.
FIG. 9 is a perspective view of still another example of the preferred embodiment of the present invention.
10 is a partially enlarged view of the example of FIG.
11 is an operation explanatory diagram of the example of FIG. 9;
[Explanation of symbols]
1 Automobile seat mechanism
2 Damper
3 Rear seat
11 Rotating body
12 Fixing member
14 Gap forming member
15 Silicone-based unvulcanized rubber
16 One-way clutch means

Claims (22)

  A rotating body configured to transmit the rotation of a vehicle seat, a fixing member configured to be fixed to a chassis on which the vehicle seat is rotatably mounted, a rotating body, and a fixed A gap forming member interposed between the members and cooperating with one of the rotating body and the fixed member to form a gap, and being arranged in the gap and cooperating with the gap forming member and the gap forming member. The silicone-based unvulcanized rubber deformed by relative rotation between one of the rotating body and the fixed member that forms a gap, and the gap forming member in the rotation in one direction of the automobile seat And a rotating body that cooperates with the gap forming member to form a gap and one of the fixed member to cause relative rotation based on rotation in one direction, while the other of the seat of the automobile In the direction of rotation, One-way clutch means for preventing relative rotation based on rotation in the other direction between a member and one of a rotating body and a fixed member that form a gap in cooperation with the gap forming member A damper for automobile seats. The rotating body is adapted to transmit lateral rotation in the direction of raising and lowering the automobile seat, and the fixing member is fixed to a chassis on which the automobile seat is rotatably installed. The one-way clutch means is provided between the gap forming member and one of the rotating body and the fixed member that form a gap in cooperation with the gap forming member in the lateral rotation of the automobile seat in the downward direction. Rotating body that causes a relative rotation based on a lateral rotation in the lowering direction and forms a clearance in cooperation with the clearance formation member and the clearance formation member in the lateral rotation in the raising direction of the automobile seat 2. The damper for an automobile seat according to claim 1, wherein relative rotation based on a lateral rotation in the raising direction between the first member and one of the fixing members is not caused. The rotating body is configured to transmit the rotation of the vehicle seat in the front-rear direction, and the fixing member is fixed to the chassis in which the vehicle seat is rotatably installed in the front-rear direction. The one-way clutch means is configured such that, in the rearward rotation of the automobile seat, the gap forming member and one of the rotating body and the fixed member that form a gap in cooperation with the gap forming member. In the meantime, a relative rotation based on a rearward rotation is generated, while a forward rotation of a seat of an automobile is performed with a gap forming member and a rotating body that cooperates with the gap forming member to form a gap, and The damper for a motor vehicle seat according to claim 1, wherein relative rotation based on forward rotation with one of the fixing members is not caused. A rotating body configured to transmit the rotation of the seat of an automobile, a gap forming member that forms a gap in cooperation with the rotating body, a silicone-based unvulcanized rubber disposed in the gap, and a gap A fixing member that rotatably supports the forming member and is fixed to a chassis on which the automobile seat is rotatably installed, and silicone in rotation in one direction of the automobile seat. The gap forming member is rotated in one direction along with the rotation of the rotating body in one direction through the unvulcanized rubber, while the rotation of the vehicle seat in the other direction is performed in the silicone system. A damper for an automobile seat, comprising: a one-way clutch means for prohibiting rotation in the other direction of a gap forming member connected to the other rotation of the rotating body via unvulcanized rubber. The rotating body is adapted to transmit lateral rotation in the direction of raising and lowering the automobile seat, and the fixing member is fixed to a chassis on which the automobile seat is rotatably installed. The one-way clutch means allows the gap forming member to be rotated with the rotation of the rotating body via the silicone-based unvulcanized rubber in the lateral rotation in the raising direction of the automobile seat. 5. The automobile seat according to claim 4, wherein the rotation of the gap forming member connected to the rotation of the rotating body through the silicone-based unvulcanized rubber is prohibited in the lateral rotation of the seat in the lowering direction. damper. The rotating body is configured to transmit the rotation of the vehicle seat in the front-rear direction, and the fixing member is fixed to the chassis in which the vehicle seat is rotatably installed in the front-rear direction. The one-way clutch means allows the gap forming member to be rotated with the rotation of the rotating body via the silicone-based unvulcanized rubber in the rearward rotation of the automobile seat, 5. The automobile seat according to claim 4, wherein the rotation of the gap forming member connected to the rotation of the rotating body via the silicone-based unvulcanized rubber is prohibited in the forward rotation of the automobile seat. damper. The damper for automobile seats according to any one of claims 1 to 6, wherein the gap forming member is rotatably supported by at least one of the rotating body and the fixed member. The gap forming member has a cylindrical outer peripheral surface, and the one-way clutch means has one end fixed to the rotating body or the fixed member and the other end free on the cylindrical outer peripheral surface of the gap forming member. The coil spring for a vehicle seat according to any one of claims 1 to 7, further comprising a coil spring wound around the cylindrical outer peripheral surface of the gap forming member between one end and the other end. damper. The rotating body includes a shaft portion and a cylindrical portion concentric with the shaft portion, and the gap forming member includes a main body that slidably contacts the shaft portion of the rotating body, and a cylindrical tube that is concentric with the main body. The damper for automobile seats as described in any one of Claim 1 to 8 which comprises the part and the cover body screwed by this cylinder part. The automobile seat damper according to claim 9, wherein a spline is formed on an outer peripheral surface of the cylindrical portion of the rotating body. The automobile seat damper according to claim 9 or 10, wherein the lid body is screwed to the outer peripheral surface or the inner peripheral surface of the cylindrical portion of the gap forming member. The damper for an automobile seat according to any one of claims 9 to 11, wherein a seal member is interposed between the lid and the cylindrical portion of the rotating body. The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a plasticity of 30 to 420. The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a plasticity of 60 to 320. The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a plasticity of 160 to 320. The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a Mooney viscosity of 10 to 150 ML 1 + 4 (100 ° C). The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a Mooney viscosity of 36 to 72 ML 1 + 4 (100 ° C). The damper for automobile seats according to any one of claims 1 to 12, wherein the silicone-based unvulcanized rubber has a Mooney viscosity of 66 to 72 ML 1 + 4 (100 ° C). The damper for automobile seats according to any one of claims 1 to 12 and 16 to 18, wherein the silicone-based unvulcanized rubber is made of silicone-modified ethylene propylene rubber. A damper for an automobile seat according to any one of claims 1 to 19, a seat provided rotatably with respect to a chassis of the automobile, and a backrest provided rotatably with respect to the seat. An automobile seat mechanism comprising: 21. The vehicle seat mechanism according to claim 20, wherein the backrest is provided so as to be pivotable rearward with respect to the seat. 21. The automobile seat mechanism according to claim 20, wherein the backrest is provided so as to be pivotable forward with respect to the seat.

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