JP4983016B2 - Vehicle seat adjustment device - Google Patents

Description

  The present invention relates to a vehicle seat adjustment device that adjusts the height of a seat cushion, and more particularly to a clutch device of a vehicle seat adjustment device.

  Conventionally, some vehicle seats are provided with a vehicle seat adjustment device that adjusts the height of the seat cushion. In such a vehicle seat adjustment device, the height of the seat cushion can be adjusted by operating the operation lever while the occupant is on the seat.

  The vehicle seat adjustment device adjusts the height of the seat cushion by inputting a forward or reverse input torque from the operation lever, and maintains the position of the seat cushion when the operation lever is released. 1 clutch part and 2nd clutch part are provided.

  When an operation force is input to the operation lever, the operation force is transmitted to the output shaft via the first clutch portion and the second clutch portion, and when the operation lever is not driven, the second clutch portion rotates the output shaft. Restrict movement. When the operating force is not input to the operating lever, the torsion spring for returning the input side member connected to the operating lever to the neutral position and the rotation range of the input side member when operating the operating lever are restricted. A stopper or the like is provided.

Therefore, the outer ring constituting the second clutch portion is provided with a flange portion serving as a stopper for restricting the rotation of the input side member and a locking portion for installing a torsion spring (see Patent Document 1). .
Japanese Patent Laying-Open No. 2003-93187 (FIG. 20)

  However, the above-described conventional configuration has a problem in that the flange portion is formed by cutting the flat portion of the outer ring, so that the strength of the outer ring is reduced and a processing step therefor is required. In addition, since the flange portion is formed by bending a notch, the height of the flange portion is limited and the axial height cannot be obtained. Therefore, concentric torsion springs having different diameters are concentric at the same axial position. In order to achieve the required spring torque, it was necessary to increase the diameter of the outer ring. For this reason, there existed a problem of causing the enlargement of an apparatus.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle seat adjustment device that has a simple configuration and can be downsized.

In order to solve the above-described problem, the invention according to claim 1 is a vehicle seat adjustment device that rotates an output shaft in accordance with an operation of an operation member and moves a seat cushion in the vertical direction by the rotation of the output shaft. An input side member having an attachment portion to which the operation member is connected and an inner ring through which the output shaft is inserted, a holding member disposed on a radially outer side of the inner ring of the input side member, and the holding member A control member disposed on the radially outer side of the control member, a stationary member disposed on the radially outer side of the control member, and an operating force of the operation member from the input side member to the control member when driving the operation member. A first clutch part that transmits and releases the transmission of force between the input side member and the control member when the operation member is returned; and the operation force of the operation member from the control member when the operation member is driven. Output shaft Transmission and, when the non-driving operation of the operation member the second clutch portion for restricting the rotation of the output shaft relative to the stationary member, of the first said input-side member to the operating force of the operating member in the clutch unit A plurality of rotating bodies that transmit from the cam surface of the inner ring to the control member, and the operation force is accumulated when the operation member is driven, and the input side member is accumulated by the accumulated elastic force when the operation member is not driven. A first elastic member that returns the neutral member to the neutral position, and the neutral member that holds the plurality of rotating bodies and moves in the circumferential direction together with the input member when the input member returns to the neutral position. A second elastic member that returns to a position , wherein the stationary member includes the first clutch portion, a cylindrical portion that accommodates the second clutch portion, and the first extending from the cylindrical portion in the axial direction . With elastic members Has a first elastic member engagement portion for engagement, the second resilient member engaging portion to be engaged with the second elastic member which is formed continuously in the axial direction from the first resilient member engaging portion, a The first elastic member engaging portion, the second elastic member engaging portion, the first engaging portion that engages with the first elastic member formed in the attachment portion of the input side member, and the holding member The gist of the present invention is that the second engaging portion that engages with the second elastic member is disposed so as to overlap in the radial direction of the stationary member .

According to the above configuration, since the first elastic member engaging portion and the second elastic member engaging portion extend in the axial direction from the cylindrical portion that accommodates the first clutch portion and the second clutch portion, There is no need for additional processing such as notching or bending in the cylindrical portion, and the stationary member can have a simple configuration. Moreover, since both elastic member engaging parts are extended from the cylindrical part in the axial direction, the axial length is not limited, and the elastic member is formed so as to be disposed at a suitable place in the axial direction. It becomes possible to do. For this reason, it is possible to prevent the device from becoming large in the radial direction and to reduce the size of the device. In addition, since the first elastic member engaging portion for engaging the first elastic member and the second elastic member engaging portion for engaging the second elastic member are formed continuously in the axial direction, both elasticity Since none of the members is restricted by the size in the radial direction, both the elastic members have the same diameter to prevent the device from becoming large in the radial direction, and the size of the device can be reduced.

  According to a second aspect of the present invention, in the vehicle seat adjustment device according to the first aspect, the stationary member has an input side member engaging portion extending in an axial direction from the cylindrical portion, and the input side The gist of the invention is that the member has a protruding portion whose rotation range is restricted by contacting the input side member engaging portion in the circumferential direction.

  According to the above configuration, since the input side member engaging portion that restricts the rotation of the input side member from the cylindrical portion that houses the first clutch portion and the second clutch portion extends in the axial direction, There is no need for additional processing such as notching or bending in the cylindrical portion, and the stationary member can have a simple configuration.

According to a third aspect of the invention, that in the vehicle seat adjustment mechanism according to claim 1, were placed in the same position as the first resilient member engaging portion and the second resilient member engaging portion in the circumferential direction Is the gist.

  According to the above configuration, the first engagement portion that engages with the first elastic member that returns the input side member to the neutral position, and the second engagement that engages with the second elastic member that returns the holding member to the neutral position. Since the portions are arranged at the same position in the circumferential direction, the stationary member can also be used as a member for engaging both elastic members.

  According to the vehicle seat adjustment device of the present invention, it is possible to achieve a simple configuration and to reduce the size of the device.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment embodying the invention will be described with reference to the drawings.
The vehicle seat 1 shown in FIGS. 1 and 2 includes a seat cushion 1a and a seat back 1b extending obliquely upward from the upper surface of the rear end of the seat cushion 1a, and moves on lower rails 2a and 2b fixed to the vehicle floor. Supported as possible. A vehicle seat adjustment device 3 that adjusts the height of the seating surface of the seat cushion 1a is provided below the seat cushion 1a.

  Upper rails 4a and 4b are slidably mounted on the lower rails 2a and 2b, respectively. Base frames 5a and 5b of the seat cushion 1a are supported on the upper rails 4a and 4b so as to be movable up and down.

  That is, the lower end portions of the lifter links 6a and 7a are rotatably supported on the front and rear end portions of the upper rail 4a, and the upper end portions of the lifter links 6a and 7a are rotatably connected to the front and rear end portions of the base frame 5a. Yes. Similarly, the lower ends of the lifter links 6b and 7b are rotatably supported on the front and rear ends of the upper rail 4b, and the upper ends of the lifter links 6b and 7b are rotatably connected to the front and rear ends of the base frame 5b. ing. Further, the connecting portions of the lifter links 7 a and 7 b and the base frames 5 a and 5 b are connected by a cylindrical torque rod 8. Accordingly, the base frames 5a and 5b can be moved up and down in conjunction with each other.

  A clutch device 11 constituting the vehicle seat adjusting device 3 is attached to the base frame 5b, an operation lever 12 as an operation member is attached to the clutch device 11, and a pinion gear 13 is attached to the output shaft of the clutch device 11. Is provided. Then, the pinion gear 13 is rotated by the operation of the operation lever 12. At the rear of the clutch device 11, the base frame 5 b rotatably supports the lower portion of the base end side of the sector gear 14, and a tooth portion 14 a that meshes with the pinion gear 13 is formed at the distal end portion of the sector gear 14. The sector gear 14 rotates with the rotation of the pinion gear 13. The upper part of the base end side of the sector gear 14 and the upper end part of the lifter link 7 b are connected by a drive link 15. The drive link 15 is rotatably connected to the sector gear 14 and the lifter link 7b. Accordingly, when the sector gear 14 is rotated, the lifter link 7b is rotated via the drive link 15, the lifter link 7a is rotated via the torque rod 8, and the base frames 5a and 5b are moved up and down in conjunction with each other. The

Next, a specific configuration of the clutch device 11 will be described.
As shown in FIGS. 3 and 4, the clutch device 11 includes a case 21 as a stationary member formed in a substantially cylindrical shape, and the case 21 is formed to protrude radially outward as shown in FIG. 5. The plurality of attachment portions 21a are attached and fixed to the base frame 5b. The case 21 includes a small-diameter portion 21b as a cylindrical portion on the operation lever 12 side and a large-diameter portion 21c as a cylindrical portion on the counter-operation lever 12 side, and between the small-diameter portion 21b and the large-diameter portion 21c. A step portion 21d extending in the radial direction is formed. An output shaft 22 is disposed inside the case 21, and the output shaft 22 is rotatably supported by the base frame 5b.

  A rotor cam 23 is integrally formed on the output shaft 22 on the operation lever 12 side of the base frame 5b, and a pinion gear 13 is integrally formed on the non-operation lever 12 side of the base frame 5b. The rotor cam 23 is formed in a substantially hexagonal shape, the outer peripheral surface is configured as a cam surface 23a, and a fitting groove 23b is formed at the center position of each side. The output shaft 22 and the rotor cam 23, and the output shaft 22 and the pinion gear 13 may be formed separately and engaged so as to rotate integrally.

  An input side member 24 to which the operation lever 12 shown in FIGS. 1 and 2 is attached is rotatably supported on the output shaft 22. As shown in FIG. 4, the input side member 24 includes an inner ring 25 formed in a cylindrical shape through which the output shaft 22 is inserted, and a lever engagement as a plate-like mounting portion extending radially outward from the inner ring 25. And a joint portion 26. As shown in FIG. 6, a plurality (three in the figure) of fitting holes 26 a into which the operation lever 12 is fitted are arranged in the lever engaging portion 26 along the circumferential direction. As a result, the input side member 24 rotates together with the operation lever 12. Further, an elastic body 27 made of a wave spring or a disc spring and washers 28a, 28b are attached to the tip of the output shaft 22 by screws 29, and the input side member 24 is attached in the axial direction by the elastic body 27. It is energized. As shown in FIG. 7, the inner ring 25 has an inner circumference formed in a circular shape and an outer circumference formed in a substantially pentagonal shape in a cross section in which the axes (front and back directions in the figure) are orthogonal to each other. The surface constitutes the cam surface 25a.

  As shown in FIGS. 3 and 4, a return member 31 and a control member 32 as a holding member are disposed inside the case 21 and outside the input side member 24 in the radial direction. The return member 31 is loosely fitted on the radially outer side of the inner ring 25. The return member 31 includes a cylindrical portion 31a and a plurality of engaging portions 31b that protrude from the cylindrical portion 31a toward the counter-operating lever 12 along the axial direction. The number of the engaging portions 31b corresponds to the shape of the inner ring 25, and in the present embodiment, five are provided and are arranged at equal intervals along the circumferential direction.

  A control member 32 is loosely fitted on the radially outer side of the return member 31. The control member 32 includes an annular outer ring 32a, first engaging portions 32b and second engagement members that are formed so as to protrude from the outer ring 32a toward the counter-operating lever 12 along the axial direction and are alternately disposed along the circumferential direction. And a joint portion 32c. The outer ring 32 a is disposed on the radially outer side of the engaging portion 31 b of the return member 31. The diameter of the outer peripheral surface of the outer ring 32 a is the same as the diameter of the inner peripheral surface of the small diameter portion 21 b of the case 21. The first engaging portion 32b is fitted into the fitting groove 23b of the rotor cam 23 with a predetermined backlash. The second engaging portion 32c is formed in an L shape having a step portion 32d extending radially outward from the outer ring 32a, and a portion extending along the axial direction has a diameter larger than that of the first engaging portion 32b. It is arranged outside in the direction.

  As shown in FIGS. 4 and 7, the return member is surrounded by the cam surface 25a of the inner ring 25, the inner peripheral surface of the outer ring 32a of the control member 32, the return member 31 and the rotor cam 23, and arranged along the cam surface 25a. A plurality of (five) spaces are defined by 31 engaging portions 31b. In each space, since the inner peripheral surface of the outer ring 32a is formed in a cylindrical shape and the cam surface 25a of the inner ring 25 is formed in a polygonal shape, the distance between the inner peripheral surface of the outer ring 32a and the cam surface 25a on both sides in the circumferential direction. Is formed with an end portion that becomes gradually narrower. As shown in FIG. 7, each space contains two first rollers 33 as rotating bodies, and a first backlash spring 34 is provided between the two first rollers 33 housed in each space. Is inserted and arranged. The first roller 33 transmits the operating force of the operating lever 12 from the cam surface 25 a of the inner ring 25 of the input side member 24 to the inner peripheral surface of the outer ring 32 a of the control member 32.

  As shown in FIG. 3, the first backlash spring 34 includes a spring part 34a disposed between the first rollers 33 and a connecting part 34b that connects the plurality of spring parts 34a. The spring part 34a is urged toward the first roller 33 disposed on both sides in the circumferential direction and in the disposed direction. Accordingly, each spring portion 34a has an inner periphery of the outer ring 32a of the control member 32 that is radially opposed to the cam surface 25a of the inner ring 25 and the cam surface 25a of the inner ring 25. The first roller 33 is urged in the direction of the end portion that becomes a narrow space of a substantially wedge-shaped space formed by the surface.

3 and FIG. 7, the input side member 24 (inner ring 25 ), the return member 31, the first roller 33, the first backlash spring 34, and the control member 32 (outer ring) are configured as described above. 32a) constitutes the first clutch part 41.

  4 and 5, the second engagement of the control member 32 is surrounded by the cam surface 23a of the rotor cam 23, the inner peripheral surface 21e of the case 21 and the base frame 5b, and is arranged along the cam surface 23a. A plurality (six) spaces are partitioned by the portion 32c. In each space, the cam surface 23a of the rotor cam 23 is formed in a polygonal shape, and the inner peripheral surface 21e of the case 21 is formed in a cylindrical shape, so that the distance between the inner peripheral surface 21e and the cam surface 23a is on both sides in the circumferential direction. A gradually narrowing end is formed. In each space, two second rollers 35 are accommodated. As shown in FIG. 5, a second backlash spring 36 is inserted between the two second rollers 35 housed in each space. As shown in FIG. 3, the second backlash spring 36 includes a spring portion 36a disposed between the second rollers 35 and a connecting portion 36b that connects the plurality of spring portions 36a. Each spring portion 36a is formed by the apex side of the rotor cam 23 whose outer peripheral surface is formed in a substantially polygonal shape, that is, the cam surface 23a of the rotor cam 23 and the inner peripheral surface of the case 21 that is radially opposed to the cam surface 23a. The second rollers 35 are urged in the direction of the end portion that becomes a narrow space of the substantially wedge-shaped space.

With the above configuration, as shown in FIGS. 3 and 6, the control member 32 (the first engagement portion 32 b and the second engagement portion 32 c), the rotor cam 23, the second roller 35, and the second backlash. second clutch component 42 more locking spring 3 6 is formed.

  As shown in FIGS. 3, 4, and 10, the clutch device 11 includes a first torsion spring 37 as a first elastic member and a second torsion spring 38 as a second elastic member. And case 21 is provided with hook part 21f as an elastic member engaging part extended in the axial direction from small diameter part 21b, and engagement piece 21g as an input side member engaging part. The hook portion 21f is formed with a first engagement portion 21h as a first elastic member engagement portion on the small diameter portion 21b side, and a second width which is narrower in the circumferential direction than the first engagement portion 21h on the distal end side. A second engagement portion 21i is formed as an elastic member engagement portion. A first torsion spring 37 is engaged with the first engagement portion 21h, and a second torsion spring 38 is engaged with the second engagement portion 21i.

  Further, the input side member 24 is formed with a hook portion 26b as a first engaging portion that engages with the first torsion spring 37, and a protruding portion 26c that contacts the engaging piece 21g in the circumferential direction. As shown in FIG. 8A, the first torsion spring 37 is engaged with the hook portion 21f and the hook portion 26b. Accordingly, the first torsion spring 37 biases the input side member 24 to return to the neutral position with reference to the hook portion 21f (first engagement 21h). Further, the input side member 24 is restricted in the rotation range by the protrusion 26 c being engaged with the engagement piece 21 g of the case 21 in the circumferential direction.

  Further, the return member 31 is formed with a hook portion 31 c as a second engagement portion that engages with the second torsion spring 38. As shown in FIG. 8B, the second torsion spring 38 is engaged with the hook portion 21f and the hook portion 31c. Accordingly, the second torsion spring 38 biases the return member 31 to return to the neutral position with reference to the hook portion 21f (second engagement portion 21i). The return member 31 is formed with an engagement piece 31 d that is engaged with the lever engagement portion 26 of the input side member 24, and the return member 31 is engaged with the lever engagement portion 26. By doing so, it is configured to rotate integrally with the input side member 24 (see FIG. 6).

  As shown in FIG. 4, the base frame 5 b has an auxiliary frame 16 attached at a position where the clutch device 11 is supported. The auxiliary frame 16 has a base end portion fixed to the base frame 5b with, for example, a bolt, and a distal end portion extending in parallel to the base frame 5b with a predetermined interval.

  A through hole is formed in the auxiliary frame 16 to form a first bearing portion 17, and a through hole is formed in the base frame 5 b so that the center line overlaps with the first bearing portion 17, and a second bearing portion is formed. 18 is formed. The diameter of the second bearing portion 18 is larger than the diameter of the first bearing portion 17.

  The output shaft 22 has an intermediate portion rotatably supported by the second bearing portion 18 and a distal end portion rotatably supported by the first bearing portion 17. Further, the tooth portion 14a of the sector gear 14 is meshed with the pinion gear 13 between the auxiliary frame 16 and the base frame 5b.

  As shown in FIG. 4, on the side of the pinion gear 13, two plane portions 22 a that are parallel to each other are formed on the side surface of the distal end portion of the output shaft 22. A spiral spring 39 is disposed around the distal end portion of the output shaft 22, and the inner peripheral side end portion 39a of the spiral spring 39 is formed so as to face substantially parallel as shown in FIG. The tip end portion of the output shaft 22 is fitted so that the flat surface portion 22a is in contact with the inner peripheral end portion 39a of the spiral spring 39, and the outer peripheral end portion 39b of the spiral spring 39 is between the auxiliary frame 16 and the base frame 5b. It is engaged with the latching shaft 40 supported by. Accordingly, the urging force of the spiral spring 39 applies a required rotational torque to the output shaft 22 with the base frame 5b as a fulcrum, and the torque acts in a direction to raise the base frames 5a and 5b.

Next, the operation of the vehicle seat adjustment apparatus including the clutch device 11 as described above will be described.
As shown in FIG. 4, when the user rotates the operation lever 12 in the seat raising direction, the input side member 24 to which the operation lever 12 is attached rotates integrally. By the rotation of the input side member 24, the inner ring 25 shown in FIG. 7 rotates, for example, in the clockwise direction, and the first roller 33 disposed between the cam surface 25a of the inner ring 25 and the outer ring 32a of the control member 32. Engages (bits into) the wedge gap. Thereby, the rotation of the inner ring 25 is transmitted to the control member. Thus, in the first clutch portion 41, the operating force of the operating lever 12 is transmitted from the input side member 24 to the control member 32 when the operating lever 12 is driven. At this time, the rotation range of the input side member 24 is restricted by the protruding portion 26c contacting the engaging piece 21g in the circumferential direction.

  When the control member 32 rotates, the first engaging portion 32b of the control member 32 shown in FIG. 5 engages with the side surface of the fitting groove 23b of the rotor cam 23, and the rotor cam 23 rotates clockwise in the drawing. At this time, the second roller 35 disposed between the cam surface 23a of the rotor cam 23 and the inner peripheral surface 21e of the case 21 is pushed and moved in the rotational direction of the rotor cam 23 by the second engagement portion 32c. Therefore, it does not engage (do not bite) the wedge gap. That is, the output shaft 22 rotates according to the operation of the operation lever 12. Thus, in the second clutch portion 42, the operating force of the operating lever 12 is transmitted from the control member 32 to the output shaft 22 when the operating lever 12 is driven. Thereby, the sector gear 14 which meshes with the pinion gear 13 of the output shaft 22 is rotated. Based on the rotation of the sector gear 14, the lifter links 7a and 7b are rotated via the drive link 15, and the base frames 5a and 5b are raised. Accordingly, the seat cushion 1a is raised. At this time, since the urging force of the spiral spring 39 acts in the direction of assisting the rotation of the output shaft 22, the operating force of the operating lever 12 is reduced.

  When the operation lever 12 is released, the output shaft 22 rotates counterclockwise in FIG. 5 due to the load due to the weight of the vehicle seat 1 and the weight of the passenger. At this time, the output shaft 22 and the rotor cam 23 are integrally rotated, and the rotor cam 23 is rotated between the cam surface 23a of the rotor cam 23 and the inner peripheral surface 21e of the case 21 as described above. The second roller 35 engages (bits into) the wedge gap. Since the case 21 is fixed to the base frame 5b, the rotation of the output shaft 22 is prevented. That is, in the second clutch portion 42, the rotation of the output shaft 22 is restricted when the operation lever 12 is not driven.

When the operation lever 12 is released, the return member 31 and the input side member 24 are rotated to the neutral position by the return springs 37 and 38. At this time, the first roller 33 moves in the same direction as the rotation direction of the return member 31 and the input side member 24 by the engaging portion 31b of the return member 31 and does not bite, so that the rotation in the neutral direction is restricted. Not. That is, in the first clutch portion 41, the transmission of force between the input side member 24 and the control member 32 is released when the operation lever 12 is returned.

  The clutch device 11 operates in the same manner as when the operation lever 12 is released when the operation lever 12 rotated in the seat raising direction is rotated to the neutral position. Not regulated. When the operation lever 12 is rotated in the seat lowering direction, the rotation direction is different, but the operation is the same as described above, and thus the description thereof is omitted.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Since the hook portion 21f extends in the axial direction from the small diameter portion 21b that accommodates the first clutch portion 41 and the second clutch portion 42, the small diameter portion 21b of the case 21 is notched or bent. No additional work is required, and the case 21 can have a simple configuration.

  (2) Since the hook portion 21f that engages the first torsion spring 37 and the second torsion spring 38 extends in the axial direction from the small diameter portion 21b, its axial length is not limited, and It is possible to form the first torsion spring 37 and the second torsion spring 38 so as to be arranged at suitable locations. For this reason, it is possible to prevent the device from becoming large in the radial direction and to reduce the size of the device.

  (3) The engagement piece 21g provided on the case 21 for restricting the rotation of the input side member 24 by contacting the protruding portion 26c of the input side member 24 extends from the small diameter portion 21b in the axial direction. Since it is provided, no additional work such as notching or bending is required for the small diameter portion 21b of the case 21, and the case 21 can be simplified.

  (4) A first engagement portion 21h for engaging the first torsion spring 37 and a second engagement portion 21i for engaging the second torsion spring 38 are formed continuously in the axial direction. For this reason, since the first torsion spring 37 and the second torsion spring 38 are not limited by the size in the radial direction, the first torsion spring 37 and the second torsion spring 38 have the same diameter, and the apparatus becomes larger in the radial direction. It is possible to reduce the size of the apparatus.

  (5) Since the first engagement portion 21h that engages with the first torsion spring 37 and the second engagement portion 21i that engages with the second torsion spring 38 are arranged at the same position in the circumferential direction, A member (hook part 21f) for engaging the first torsion spring 37 and the second torsion spring 38 in the case 21 can also be used.

Note that the present embodiment is not limited to the above configuration, and may be modified to the following modes.
In the above embodiment, the cylindrical portion that accommodates the first clutch portion 41 and the second clutch portion 42 has the small diameter portion 21b and the large diameter portion 21c, but the shape of the cylindrical portion is not limited to this. . For example, the portion that accommodates the first clutch portion and the portion that accommodates the second clutch portion may have substantially the same diameter.

  In the above embodiment, the case 21 of the clutch device 11 is directly attached and fixed to the base frame 5b. However, even if the base that supports the output shaft 22 is provided and the case 21 is fixed to the base, the clutch device 11 is unitized. Good.

  In the above-described embodiment, the seat cushion 1a is urged by the spiral spring 39, but may be urged by another elastic body such as a torsion bar.

The perspective view of a vehicle seat. The perspective view of the vehicle seat adjustment apparatus. The disassembled perspective view of a clutch apparatus. Sectional drawing of a clutch apparatus. AA line sectional view of Drawing 4. Explanatory drawing of an input side member. BB sectional drawing of FIG. (A) (b) is explanatory drawing of a return spring. The front view of a spiral spring. The perspective view for demonstrating a clutch apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1a ... Seat cushion, 3 ... Vehicle seat adjustment apparatus, 12 ... Operation lever (operation member), 21 ... Case (stationary member), 21b ... Small diameter part (cylindrical part), 21c ... Large diameter part (cylindrical part), 21f ... hook part (elastic member engaging part), 21g ... engaging piece (input side member engaging part), 21h ... first engaging part (first elastic member engaging part), 21i ... second engaging part ( 2nd elastic member engaging part), 22 ... output shaft, 24 ... input side member, 25a ... cam surface, 26 ... lever engaging part (attachment part), 26b ... hook part (first engaging part), 26c ... Projection, 31 ... return member (holding member), 31c ... hook part (second engagement part), 32 ... control member, 37 ... first torsion spring (elastic member, first elastic member), 38 ... second torsion Spring (elastic member, second elastic member), 41... First clutch portion, 42.

Claims (3)

A vehicle seat adjustment device that rotates an output shaft according to an operation of an operation member and moves a seat cushion in the vertical direction by rotation of the output shaft,
An input side member having an attachment portion to which the operation member is connected and an inner ring through which the output shaft is inserted, a holding member disposed on a radially outer side of the inner ring of the input side member, and a radial direction of the holding member A control member disposed outside, a stationary member disposed radially outside the control member, and an operation force of the operation member is transmitted from the input side member to the control member during a drive operation of the operation member; A first clutch portion for releasing transmission of force between the input side member and the control member when the operation member is returned; and an operation force of the operation member from the control member to the output shaft when the operation member is driven. A second clutch part that restricts the rotation of the output shaft relative to the stationary member, and the operating force of the operating member at the first clutch part is transmitted to the input side member at a time other than the drive operation of the operating member. Inner ring Neutral and a plurality of rotating bodies, wherein at the time of driving operation of the operating member to accumulate the operating force, the input-side member with the accumulated elastic force when the non-driving operation of the operation member for transmitting a beam plane to said control member A first elastic member that returns to a position; and when the input side member returns to a neutral position, the holding member is moved to the neutral position so as to hold the plurality of rotating bodies and move in the circumferential direction together with the input side member. A second elastic member to be restored ,
The stationary member includes a cylindrical portion that houses the first clutch portion and the second clutch portion, and a first elastic member engaging portion that engages with the first elastic member that extends in the axial direction from the cylindrical portion. And a second elastic member engaging portion that engages with the second elastic member formed continuously in the axial direction from the first elastic member engaging portion ,
The first elastic member engaging portion, the second elastic member engaging portion, the first engaging portion that engages with the first elastic member formed in the attachment portion of the input side member, and the holding member The vehicular seat adjustment device , wherein the formed second engaging portion that engages with the second elastic member is disposed so as to overlap in the radial direction of the stationary member .   The stationary member has an input side member engaging portion that extends in the axial direction from the cylindrical portion, and the input side member is in contact with the input side member engaging portion in the circumferential direction, thereby restricting a rotation range. The vehicle seat adjusting device according to claim 1, further comprising a protruding portion. The vehicle seat adjustment device according to claim 1, wherein the first elastic member engaging portion and the second elastic member engaging portion are arranged at the same position in the circumferential direction.

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