JP4940653B2 - 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.

  For example, in the vehicle seat adjustment device disclosed in Patent Document 1, the height of the seat cushion is adjusted by inputting the input torque in the forward direction or the reverse direction by the operation lever, and the operation lever is released. The first clutch portion and the second clutch portion that hold the position of the seat cushion are provided.

  When the operation lever is operated, the first clutch portion transmits the operation force from the input side member to which the operation lever is connected to the control member, and when the operation lever is not operated, the force between the control member and the control member is transmitted. Cancel transmission. The second clutch portion transmits the operation force from the control member to the output shaft when the operation lever is operated, and locks the rotation of the output shaft when the operation lever is not operated.

  In the second clutch portion, a polygonal cam surface is formed on the outer peripheral surface of the output shaft, and a plurality of rollers are disposed between the cam surface and the inner peripheral surface of the case disposed on the outer peripheral side of the output shaft. ing. Further, a radially extending wall portion formed on the control member and a radially extending wall portion formed on the output shaft are disposed adjacent to each other in the axial direction, and the outer peripheral edge of the wall portion of the control member is disposed on the outer peripheral edge. A column portion disposed between the rollers is formed, a convex pin is formed on the wall portion of the control member, and a concave pin hole for fitting the pin is formed on the wall portion of the output shaft. .

With the above configuration, when an operation force is input to the operation lever and the control member rotates, the column part releases the roller from the locked state along with the rotation, and the pin of the control member engages with the pin hole of the output shaft. The output shaft rotates. Further, when the force is applied to the seat cushion and the output shaft rotates, the roller is engaged between the cam surface of the output shaft and the control member to prevent the output shaft from rotating.
JP 2003-93187 A (FIGS. 17 to 19)

  However, in the conventional configuration described above, the pin formed on the control member engages with the pin hole formed on the output shaft so that the control member and the output shaft rotate integrally, but the pin hole is formed on the output shaft. Since the wall portion is a concave groove with one side surface in the axial direction opened, for example, the control member may rattle in the axial direction with respect to the output shaft, and the pin and the pin hole may be disengaged. Ensuring the axial length of the pin and the pin hole cannot be disengaged, but doing so requires the wall portion of the output shaft to be thick and undesirably increases the size of the device.

  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 capable of reliably engaging a control member and an output shaft in the circumferential direction without increasing the size of the device. It is to provide.

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. When operating the operating member, the operating force is transmitted from the cylindrical input side member to which the operating member is connected to a cylindrical control member disposed on the outer peripheral side of the input side member. The first clutch portion for releasing the transmission of force between the input side member and the control member, and the engagement portion that is connected to the output shaft and penetrates in the axial direction is formed at times other than the drive operation A wedge-shaped space formed between the cam surface and the inner peripheral surface, a stationary member having an inner peripheral surface radially opposed to the member, a cam surface formed on the outer peripheral surface of the rotating member, and A plurality of arranged rotating bodies and shafts from the control member And a projecting piece extending in the direction and disposed at the engaging portion, and during operation of driving the operating member, the operating force of the operating member is transmitted from the control member to the output shaft, A second clutch portion that locks the rotation of the output shaft at the inner peripheral surface of the stationary member when the operation is not performed, and the control member is formed continuously from the control member in the axial direction. A first projecting piece disposed in the engaging portion and a bent portion formed from the control member are disposed at an end portion where the distance between the cam surface and the inner peripheral surface is narrowed in the wedge-shaped space of the second clutch portion. And the second clutch portion includes spring members that respectively bias the plurality of rotating bodies toward the end portion where the distance between the cam surface and the inner peripheral surface is reduced. The base portion of the spring member is fitted into the engaging portion and the base portion is circumferentially inserted. The first projecting piece is disposed between the plurality of rotating bodies and the second projecting piece rather than a gap formed in the circumferential direction between the base and the first projecting piece. The gist is that the gap is set small .

  According to the above configuration, since the protruding piece of the control member is disposed in the engaging portion formed in the rotating member and penetrating in the axial direction, the rotating member can be formed without increasing the axial thickness of the rotating member. And the control member are reliably engaged in the circumferential direction.

  According to the above configuration, the contact surface in the axial direction between the control member and the rotating member is only the bent portion of the second projecting piece. For example, a wall portion extending in the radial direction is formed on the control member, and the wall portion is The contact surface can be reduced as compared with the case where the first protrusion is formed. For this reason, since the contact surface of the axial direction of a control member and a rotation member increases, it is prevented that the rotational force of a rotation member (output shaft) is transmitted to a control member by the friction of the contact surface.

  According to the above configuration, when a rotational force is applied to the output shaft, the plurality of rotating bodies are rotated by being biased by the spring member before the wall surface of the engaging portion of the rotating member comes into contact with the first projecting piece. Since it is engaged between the cam surface of the member and the inner peripheral surface of the stationary member, the rotation of the output shaft is reliably prevented.

  According to the vehicle seat adjustment device of the present invention, the control member and the output shaft can be reliably engaged in the circumferential direction without increasing 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 on the operation lever 12 side and a large diameter portion 21c on the counter operation lever 12 side. An output shaft 22 is disposed inside the case 21, and the output shaft 22 is rotatably supported by the base frame 5b.

  The output shaft 22 is integrally formed with a rotor cam 23 as a rotating member 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 as an engaging portion is formed at the center position of each side. The fitting groove 23b is formed in the radial direction so as to open on each side of the cam surface 23a, and penetrates the rotor cam 23 in the axial direction. 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 that is formed in a cylindrical shape and through which the output shaft 22 is inserted, and a plate-like lever engaging portion 26 that extends radially outward from the inner ring 25. It has. 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 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 holding portions 31b formed to protrude from the cylindrical portion 31a toward the counter-operating lever 12 along the axial direction. The number of holding portions 31b corresponds to the shape of the inner ring 25, and in the present embodiment, five holding portions 31b are provided and arranged at equal intervals along the circumferential direction.

  A cylindrical control member 32 is loosely fitted on the radially outer side of the return member 31. The control member 32 is formed with first projecting pieces 32 a and second projecting pieces 32 b which are formed so as to project toward the counter-operating lever 12 along the axial direction and are alternately arranged along the circumferential direction. The control member 32 is disposed on the radially outer side of the holding portion 31 b of the return member 31. The first projecting piece 32 a is formed continuously from the cylindrical control member 32 in the axial direction, and is inserted into the fitting groove 23 b of the rotor cam 23 with a predetermined backlash. The second projecting piece 32b is formed in an L shape from the control member 32 toward the radially outer side.

  As shown in FIGS. 4 and 7, the cam surface 25a of the inner ring 25, the inner peripheral surface of the control member 32 of the control member 32, the return member 31, and the rotor cam 23 are surrounded and returned along the cam surface 25a. A plurality of (five) spaces are defined by the holding portion 31b of the member 31. In each space, the inner peripheral surface of the control member 32 is formed in a cylindrical shape, and the cam surface 25a of the inner ring 25 is formed in a polygonal shape. Therefore, the inner peripheral surface of the control member 32 and the cam surface 25a are arranged on both sides in the circumferential direction. The end portion is formed such that the distance of the is gradually reduced. As shown in FIG. 7, two first rollers 33 are accommodated in each space, and a first backlash spring 34 is inserted between the two first rollers 33 accommodated in each space. ing. 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 is located on the apex side of the inner ring 25 whose outer peripheral surface is formed in a substantially polygonal shape, that is, in the control member 32 of the control member 32 that is radially opposed to the cam surface 25a of the inner ring 25 and the cam surface 25a. The first rollers 33 are urged in the direction of the end portion which is a narrow space of a substantially wedge-shaped space formed by the peripheral surface.

  3 and 7, the input side member 24 (inner ring 24), the return member 31, the first roller 33, the first backlash spring 34, and the control member 32 (control) are configured as described above. The first clutch part 41 is constituted by the member 32).

  As shown in FIGS. 4 and 5, the second projecting piece 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 of (six) spaces are defined by 32b. 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.

  Each space accommodates two second rollers 35 as two rotating bodies. 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 as a spring member disposed between the second rollers 35, and a connecting portion 36b that connects the plurality of spring portions 36a. Yes. The base portion of each spring portion 36a is accommodated in the fitting groove 23b of the rotor cam 23, and the spring portion 36a is located on the apex side of the rotor cam 23 having an outer peripheral surface formed in a substantially polygonal shape, that is, the cam surface 23a of the rotor cam 23 and the cam. The second rollers 35 are urged in the direction of the end portion which is a narrow space of a substantially wedge-shaped space formed by the surface 23a and the inner peripheral surface of the case 21 facing in the radial direction. The second projecting piece 32b formed on the control member 32 is disposed at an end portion that becomes a narrow space of the wedge-shaped space, and is disposed between the second rollers 35 in the circumferential direction. In the present embodiment, the gap is formed between the second roller 35 and the second protrusion 32b rather than the gap formed in the circumferential direction between the base of the spring portion 36a and the first protrusion 32a. The gap was set small.

  With the above configuration, as shown in FIGS. 3 and 6, the control member 32 (first projecting piece 32a and second projecting piece 32b), the rotor cam 23, the second roller 35, and the second rattling stop spring. 36 and the case 21 constitute a second clutch portion 42. In the present embodiment, the first clutch portion 41 and the second clutch portion 42 are disposed close to each other in the axial direction.

  As shown in FIG. 3, hooks 21 f, 24 a, and 31 c are formed on the case 21, the input side member 24, and the return member 31 so as to overlap in the radial direction, respectively. As shown in FIG. 8, the hook portions 21f, 24a, 31c are engaged with return springs 37, 38 as return means, and are rotated to positions overlapping in the radial direction by the elastic force of the return springs 37, 38. By being biased in this manner, the input side member 24 and the return member 31 are provided to return to the neutral position corresponding to the hook portion 21f of the case 21. In the present embodiment, the return springs 37 and 38 are disposed close to the operation lever 12 in the axial direction.

  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. The rotation of the input side member 24 causes the inner ring 25 shown in FIG. 7 to rotate clockwise, for example, and the first roller disposed between the cam surface 25a of the inner ring 25 and the control member 32 of the control member 32. 33 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.

  When the control member 32 rotates, the first projecting piece 32a 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 figure. 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 projecting piece 32b. , Do not engage (do not bite) the wedge gap. That is, the output shaft 22 rotates according to the operation of the operation lever 12. At this time, since the gap formed between the second roller 35 and the second projecting piece 32b is set smaller than the gap formed in the circumferential direction between the base of the spring portion 36a and the first projecting piece 32a, When the control member 32 rotates, the output shaft 22 rotates smoothly because the first protrusion 32a presses the wall surface of the fitting groove 23b after the second protrusion 32b presses the second roller 35 in the circumferential direction. . 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. At this time, the gap formed between the second roller 35 and the first projecting piece 32a is smaller than the gap formed in the circumferential direction between the base of the spring portion 36a and the first projecting piece 32a. The second roller 35 is reliably engaged with the wedge gap without the one projecting piece 32 a being pushed by the wall surface of the fitting groove 23 b of the rotor cam 23.

  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 holding portion 31b of the return member 31, and does not bite, so that the rotation in the neutral direction is not restricted. . 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 first projecting piece 32a of the control member 32 is disposed in the fitting groove 23b formed in the rotor cam 23 and penetrating in the axial direction, the rotor cam 23 can be obtained without increasing the axial thickness of the rotor cam 23. The (output shaft 22) and the control member 32 are reliably engaged in the circumferential direction.

  (2) The axial contact surface between the control member 32 and the rotor cam 23 is only a bent portion of the second projecting piece 32b. For example, as in Patent Document 1, a wall portion extending in the radial direction on the control member 32 Compared to the case where the first protrusion is formed on the wall portion, the contact surface can be reduced. For this reason, since the contact surface in the axial direction between the control member 32 and the rotor cam 23 increases, the rotational force of the rotor cam 23 (output shaft 22) is prevented from being transmitted to the control member 32 due to the friction of the contact surface. .

  (3) When a rotational force is applied to the output shaft 22, before the wall surface of the fitting groove 23b of the rotor cam 23 comes into contact with the first projecting piece 32a, the second roller 35 is urged by the spring portion 36a. Since the cam surface 23a is engaged with the inner peripheral surface 21e of the case 21, the rotation of the output shaft 22 is reliably prevented.

Note that the present embodiment is not limited to the above configuration, and may be modified to the following modes.
-In above-mentioned embodiment, although the fitting groove 23b opened to the outer peripheral surface of this rotor cam 23 was formed in the rotor cam 23 as an engaging part, an engaging part is not limited to this aspect. For example, a hole penetrating in the axial direction may be formed in the rotor cam, and the through hole may be used as the engaging portion.

  In the above embodiment, the base portion of the spring portion 36a that urges the second roller 35 is disposed in the fitting groove 23b of the rotor cam 23. However, the second roller 35 is adjacent to the circumferential direction. If the spring member for urging the two rollers 35 is arranged, the spring portion 36a may not be accommodated in the fitting groove 23b. In that case, if the gap formed between the second roller 35 and the second protruding piece 32b is set smaller than the gap formed in the circumferential direction between the fitting groove 23b and the first protruding piece 32a. Good. Then, as in the above embodiment, when a rotational force is applied to the output shaft 22, the second wall is urged by the spring member before the wall surface of the fitting groove 23b of the rotor cam 23 abuts against the first projecting piece 32a. Since the roller 35 is engaged between the cam surface 23a of the rotor cam 23 and the inner peripheral surface 21e of the case 21, rotation of the output shaft is reliably prevented.

In the above embodiment, the second backlash spring 36 has the spring portion 36a and the connecting portion 36b integrally formed, but the spring portion 36a and the connecting portion 36b may be separate members.
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 for supporting 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. Explanatory drawing of a return spring. The front view of a spiral spring.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1a ... Seat cushion, 3 ... Vehicle seat adjustment apparatus, 12 ... Operation lever (operation member), 21 ... Case (stationary member), 21e ... Inner peripheral surface, 22 ... Output shaft, 23 ... Rotor cam (rotating member), 23a ... Cam surface, 23b ... Fitting groove (engagement part), 24 ... Input side member, 32 ... Control member, 32a ... First projecting piece (projecting piece), 32b ... Second projecting piece, 35 ... Second roller (Rotary body), 36a ... spring part (spring member), 41 ... first clutch part, 42 ... second clutch part.

Claims (1)

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,
During the driving operation of the operating member, the operating force is transmitted from the cylindrical input side member to which the operating member is connected to the cylindrical control member disposed on the outer peripheral side of the input side member, and the driving operation of the operating member is performed. A first clutch portion for releasing the transmission of force between the input side member and the control member,
A rotating member connected to the output shaft and having an engaging portion penetrating in the axial direction, and a stationary member having an inner peripheral surface radially opposed to a cam surface formed on the outer peripheral surface of the rotating member. A plurality of rotating bodies disposed in a wedge-shaped space formed between the cam surface and the inner peripheral surface, and a protrusion extending in the axial direction from the control member and disposed in the engaging portion. The operating force of the operating member is transmitted from the control member to the output shaft during the driving operation of the operating member, and the rotation of the output shaft is stationary when the operating member is not driven. A second clutch portion that locks on the inner peripheral surface of the member;
Equipped with a,
The control member is formed continuously from the control member in the axial direction, and is bent from the control member, and is formed in the wedge-shaped space of the second clutch portion. A second projecting piece disposed at an end where the distance between the cam surface and the inner peripheral surface is reduced;
The second clutch portion includes a spring member that urges each of the plurality of rotating bodies in a direction of an end portion where a distance between the cam surface and the inner peripheral surface is narrowed,
A gap formed in the circumferential direction between the base portion and the first projecting piece by inserting the base portion of the spring member into the engaging portion and arranging the first projecting piece between the base portions in the circumferential direction. A vehicle seat adjustment device characterized in that a gap formed between the plurality of rotating bodies and the second projecting piece is set to be smaller .

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