JP2010127304A - Clutch device and seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch device and a seat device reducing a number of components of an input side member returning to a neutral position when input torque is lost. <P>SOLUTION: A protruding piece 22b of a lever member 22 is fitted in a first slit 25b of a reverse plate 25, and a protruding piece 26b of a retainer 26 is fitted in a second slit 25d of the reverse plate 25. The lever member 22 and the reverse plate 25 are urged to the neutral position by a spring 23. The first slit 25b is formed on an outer peripheral side of the protruding piece 25a, and the second slit 25d is formed on an inner peripheral side of the protruding piece 25a. A wedge-shaped space is formed between a cam surface of an input side cam to which rotation of the lever member 22 is transmitted and an inner peripheral surface of a rotation transmitting member, and pushing pieces 26c of the retainer 26 are interposed between input side rollers 28 stored in the wedge-shaped spaces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clutch device and a seat device that transmit rotation of an input side member by an input torque to an output side member and return only the input side member to a neutral position when the input torque disappears.

  Conventionally, a clutch device disclosed in Patent Document 1 below is known as a clutch device that transmits the rotation of the input side member by the input torque to the output side member and returns only the input side member to the neutral position when the input torque disappears. Yes. In this clutch device, for example, when an input torque in the counterclockwise direction is input to the outer ring, the cam surface of the outer ring moves relative to each roller counterclockwise as the outer ring rotates, Each wedge engages with a wedge gap in that direction. As a result, the input torque from the outer ring is transmitted to the inner ring through the roller, and the outer ring, each roller, the cage that holds each roller, and the inner ring rotate together in a counterclockwise direction.

At this time, the rotational force in the clockwise direction acts on the cage by the elastic force accumulated by the deflection of the centering spring as the cage rotates, and each roller is pushed by the cage and presses the cam surface. When the outer ring is released, the rollers, the cage, and the outer ring idle in the clockwise direction with respect to the inner ring and return to the neutral position.
JP 2002-045658 A

  By the way, in the above configuration, the number of components such as a cage for holding each roller and a centering spring for urging the cage to the neutral position increases. If the number of parts increases in this way, there is a problem that reduction in manufacturing cost and downsizing are hindered.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a clutch device and a seat device that can reduce the number of parts of the input side member that returns to the neutral position when the input torque is lost. It is to provide.

  In order to achieve the above object, in the clutch device according to claim 1, when the rotation of the input side member (20) by the input torque is transmitted to the output side member (30) and the input torque disappears. In the clutch device (10) for returning only the input side member to the neutral position, the input side member is rotatably supported with respect to the housing (21), and is a lever member (22) that rotates according to the input torque. A lever member having a first projecting piece (22b) projecting to one side in the axial direction and a second projecting piece (25a) projecting to the other side in the axial direction, on the outer peripheral side of the second projecting piece The first slit (25b) with which the first projecting piece can be engaged is formed, and the second direction slit member (25d) is formed on the inner peripheral side of the second projecting piece (25). ), The lever member and the (2) A biasing member (23) for biasing the protruding pieces to the neutral position with respect to the housing, a plurality of pressing pieces (26c) protruding from the outer peripheral portion to the one side in the axial direction, and the second slit A retainer (26) having a third protruding piece (26b) protruding to the other side in the axial direction so as to be engageable, and a plurality of engagement elements (28) for rotating the lever member via a connecting shaft (24) An input side cam (27) capable of transmitting to the output side member via a rotation transmission member (41), between the cam surface (27c) and the inner peripheral surface (41a) of the rotation transmission member And an input side cam having a cam surface formed so as to provide a wedge-shaped space capable of accommodating each of the engaging elements, and the first projecting piece is engaged with the first slit and the The third protruding piece is engaged with the second slit, and the front Technically, the lever member and the second projecting piece are urged to the neutral position by the urging member, and the pressing pieces are interposed between the engaging elements accommodated in the wedge-shaped spaces, respectively. Features.

  In the clutch device according to claim 1, the first protruding piece of the lever member is engaged with the first slit of the rotating direction changing member, and the third protruding piece of the retainer is engaged with the second slit of the rotating direction changing member. The lever member and the second projecting piece of the rotation direction changing member are biased to the neutral position by the biasing member. In the rotation direction conversion member, the first slit is formed on the outer peripheral side of the second protruding piece, and the second slit is formed on the inner peripheral side of the second protruding piece. A wedge-shaped space is provided between the cam surface of the input cam to which the rotation of the lever member is transmitted and the inner peripheral surface of the rotation transmitting member, and each pressing piece of the retainer has a wedge shape. It is interposed between the engagement elements accommodated in the space.

  Thereby, for example, when the lever member rotates clockwise according to the input torque, the input side cam rotates clockwise together with the connecting shaft. At this time, the vicinity of the first slit of the rotation direction changing member that engages with the first protruding piece of the lever member moves in the clockwise direction. Due to the movement in the vicinity of the first slit, the rotation direction conversion member swings around the vicinity of the second protruding piece biased by the biasing member. Here, since the first slit is formed on the outer peripheral side of the second projecting piece and the second slit is formed on the inner peripheral side of the second projecting piece, the vicinity of the third projecting piece of the retainer that engages with the second slit. Moves in a counterclockwise direction. Due to the movement in the vicinity of the third projecting piece, the retainer rotates counterclockwise. By the rotation of the retainer, each pressing piece presses the engaging element against the cam surface forming the wedge-shaped space on the counterclockwise direction and the inner peripheral surface of the rotation transmitting member, so that the input side cam is interposed through each engaging element. Thus, it rotates together with the rotation transmitting member. For this reason, the input torque is transmitted to the output side member via the lever member, the connecting shaft, the input side cam, each engagement element, and the rotation transmission member. In addition, also when a lever member rotates counterclockwise according to input torque, input torque is similarly transmitted to an output side member.

  When the input torque disappears, the lever member and the rotation direction conversion member are urged by the urging member, so that the lever member and the input side cam rotate counterclockwise to return to the neutral position and rotate. When the moving direction converting member swings in the neutral direction, the retainer rotates clockwise and returns to the neutral position. Thus, when the input side cam is rotated counterclockwise and the retainer is rotated clockwise, each engagement element is not pressed against the wedge-shaped space by each pressing piece. It is not transmitted to the member.

  With such a configuration, in order to return only the input side member to the neutral position when the input torque is lost, the lever member and the retainer are urged to the neutral position only by the rotation direction changing member and the urging member. Thereby, it is not necessary to provide the urging member for urging the lever member, the retainer or the like to the neutral position. In addition, each engaging element is pressed against the cam surface forming the wedge-shaped space by the pressing piece of the retainer and the inner peripheral surface of the rotation transmitting member, so that it is necessary to separately provide a cage for holding each engaging element. There is no.

  Therefore, the number of parts of the input side member that returns to the neutral position when the input torque is eliminated can be reduced. In addition, the manufacturing cost can be reduced and the size can be reduced by reducing the number of parts.

  In the clutch device according to the second aspect, the rotation direction changing member is formed such that the second projecting piece and the first slit are close to each other. In this way, the second projecting piece that becomes the swing center of the rotation direction changing member and the first slit that engages the first projecting piece of the lever member are close to each other, so The swaying of the moving direction changing member is increased. Thus, when the swinging movement of the rotation direction conversion member increases, the movement of the retainer that engages with the second slit in the vicinity of the third protruding piece increases, and the rotation angle of the retainer increases.

  When the rotation angle of the retainer increases as described above, when the lever member starts to rotate, each pressing piece of the retainer immediately presses the corresponding engagement element against the input side cam and the rotation transmission member. The input side cam and the rotation transmission member start to rotate together. For this reason, even if a play for enabling forward and reverse rotation is provided between each engagement element and the input side cam, the rotation of the lever member is immediately transmitted to the output side member. Operability can be improved.

  The seat device according to a third aspect includes the seat and the clutch device according to the first or second aspect, and the height of the seat is adjusted according to the rotation transmitted from the output side member. Thus, it is possible to realize a seat device that enjoys the operations and effects of the inventions according to claim 1 or 2 such that the number of parts of the input side member that returns to the neutral position when the input torque is eliminated can be reduced.

  Hereinafter, an embodiment of a vehicle seat device to which a clutch device according to the present invention is applied will be described with reference to the drawings. FIG. 1 is a side view showing a vehicle seat device 100 to which a clutch device 10 according to the present invention is applied.

  As shown in FIG. 1, a vehicle seat device 100 mainly includes a seat rail 101 that can slide back and forth with respect to a vehicle floor B, and a seat bracket (not shown) on the seat rail 101. A seat cushion 102 to be attached and a seat back 103 supported to be tiltable with respect to the seat cushion 102 are provided. A clutch device 10 according to the present invention is disposed on one side of the seat cushion 102, and an operation lever 104 is coupled to the clutch device 10.

  The clutch device 10 transmits an input torque generated by operating the operation lever 104 to a known height mechanism (not shown) provided on the seat bracket via an input side member 20 and an output side member 30 described later. The height of the seat cushion 102 is adjusted to an arbitrary height.

  That is, the clutch device 10 is configured to transmit the rotation of the input side member 20 by the input torque to the output side member 30 and to return only the input side member 20 to the neutral position when the input torque disappears. For this reason, in the clutch device 10, the output side member 30 is fixed so as not to rotate so as to maintain the height of the seat cushion 102 at the neutral position N where the operation lever 104 is horizontal.

  Further, when the operating lever 104 is swung upward in order to raise the height of the seat cushion 102, the clutch device 10 causes the input torque corresponding to the swing operation to be input to the input side member 20 and the output side. This is transmitted to the height mechanism via the member 30. As a result, the height of the seat cushion 102 increases. When the input torque is lost, the output side member 30 maintains its rotation angle, and the input side member 20 returns to the neutral position together with the operation lever 104, so that the height of the raised seat cushion 102 is maintained.

  On the other hand, when the operating lever 104 is swung downward D to lower the height of the seat cushion 102, the clutch device 10 receives the input torque corresponding to the swing operation from the input side member 20 and the output side. It is transmitted to the height mechanism via the member 30. Thereby, the height of the seat cushion 102 is lowered. When the input torque disappears, the output side member 30 maintains its rotation angle, and the input side member 20 returns to the neutral position together with the operation lever 104. Therefore, the height of the lowered seat cushion 102 is maintained.

Next, the configuration of the clutch device 10 will be described in detail with reference to the drawings. FIG. 2 is an exploded perspective view of the clutch device 10. FIG. 3 is a cross-sectional view of the clutch device 10.
2 and 3, the clutch device 10 includes an input side housing 21, a lever member 22, a spring 23, a connecting shaft 24, a reverse plate 25, a retainer 26, an input side cam 27, and six input side rollers 28. An input side member 20, an output side cam 31, eight output side rollers 32, four springs 33, a pinion gear 34, an output side housing 35 and a friction spring 36. The output side member 30 is coaxially disposed via the rotation transmission member 41 and the washer 42.

First, each part which comprises the input side member 20 is demonstrated.
The input side housing 21 is formed in a substantially bottomed cylindrical shape, and a through hole 21b is provided in the center of the bottom wall 21a. The bottom wall 21a is formed with a first opening 21c and a second opening 21d so as to face the through hole 21b, and protrudes outward at the end of the first opening 21c on the through hole 21b side. A protruding piece 21e is formed.

  The lever member 22 is connected to the operation lever 104 and plays a role of transmitting input torque generated by a swing operation of the operation lever 104 to the connection shaft 24 and the like. The lever member 22 is formed such that the central portion of the substantially circular plate protrudes to one side in the axial direction (the right side in FIGS. 2 and 3), and a shaft of a connecting shaft 24 described later is formed at the center of the protruding portion. An engagement hole 22a that can be engaged with the other end 24a in the direction is formed. The lever member 22 has a protruding piece 22b protruding from the upper end of the outer edge portion toward the axial direction and a plurality of protrusions protruding from the end portion excluding the upper end of the outer edge portion on the axial direction side and shorter than the protruding piece 22b. A piece 22c is formed. The protruding piece 22b corresponds to an example of a “first protruding piece” recited in the claims.

  The spring 23 is formed by bending a flat plate-like elastic member, and includes a substantially C-shaped spring body 23a and hook portions 23b that are bent inward from both ends of the spring body 23a. The spring body 23 a is formed to be curved so as to contact the inner surface or the outer surface of each protruding piece 22 c of the lever member 22, and biasing member that biases the lever member 22 to the neutral position with respect to the input side housing 21. As a function. Further, the hook portion 23b functions as an urging member that urges the reverse plate 25 in the neutral direction by sandwiching a protruding piece 25a of the reverse plate 25 described later. The spring 23 corresponds to an example of an “urging member” described in the claims.

  The connecting shaft 24 is formed in a hollow shape, and its other axial end 24a is formed to be engageable with the engaging hole 22a of the lever member 22, and its one axial end 24b is an input to be described later. It is formed to be engageable with the engagement hole 27 a of the side cam 27.

  The reverse plate 25 is formed in a substantially elliptical plate shape, and includes a protruding piece 25a protruding from the vicinity of the outer edge to the other side in the axial direction (the left side in FIGS. 2 and 3). The reverse plate 25 is provided with a first slit 25b in the vicinity of the protruding piece 25a on the outer peripheral side of the protruding piece 25a. The first slit 25b is engaged with the protruding piece 22b of the lever member 22. It is made possible. The reverse plate 25 is formed with an opening 25c through which the connecting shaft 24 can be inserted on the inner peripheral side of the protruding piece 25a. A second slit 25d having an opening width narrower than other opening portions is provided in the vicinity of the protruding piece 25a of the opening 25c. The protruding piece 25 a is formed so that its width-direction dimension is equal to the width dimension of the protruding piece 21 e of the input-side housing 21. Here, the reverse plate 25 corresponds to an example of a “turning direction changing member” described in the claims, and the protruding piece 25a corresponds to an example of a “second protruding piece” described in the claims. To do.

  The retainer 26 is formed in a substantially disk shape, and an opening 26a through which the connecting shaft 24 can be inserted is provided at the center. Further, the retainer 26 is formed with a protruding piece 26b that can be engaged with the second slit 25d of the reverse plate 25 that is coaxially disposed so as to protrude from the vicinity of the opening 26a to the other side in the axial direction. The retainer 26 includes twelve pressing pieces 26c. Each pressing piece 26c can press the corresponding input side roller 28 with a side surface in a wedge-shaped space, which will be described later, on the outer peripheral portion of the retainer 26. Are formed so as to protrude to one side in the axial direction. The protruding piece 26b corresponds to an example of a “third protruding piece” recited in the claims.

  The input side cam 27 is formed in a substantially disc shape with a large plate thickness, and an engagement hole 27a that can be coaxially engaged with the axial one side end portion 24b of the connecting shaft 24 is provided at the center thereof. It has been. On the outer peripheral surface of the input side cam 27, two projecting portions 27b projecting outward are formed so as to face each other in the diameter direction. Further, the outer peripheral surface of the input side cam 27 excluding both the projecting portions 27b constitutes a cam surface 27c, and this cam surface 27c is a pair of opposed surfaces between the inner peripheral surface of the cylindrical portion 41a of the rotation transmitting member 41. Six wedge-shaped spaces are provided.

  Each input side roller 28 is formed in a cylindrical shape, and the diameter thereof can be rotated forward and backward in a pair of opposed wedge-shaped spaces formed by the cam surface 27c and the inner peripheral surface of the cylindrical portion 41a. It is formed to have play for. Each input-side roller 28 corresponds to an example of an “engagement element” described in the claims.

Next, each part which comprises the output side member 30 is demonstrated.
The output cam 31 is formed in a substantially disk shape with a large plate thickness, and an engagement hole 31a for coaxially engaging with the pinion gear 34 is provided at the center thereof. On the outer peripheral surface of the output cam 31, four protrusions 31b projecting outward at equal intervals in the circumferential direction are formed, and grooves 31c having four substantially U-shaped cross sections are formed at equal intervals in the circumferential direction. ing.

  The outer peripheral surface of the output side cam 31 excluding the projections 31b and the grooves 31c constitutes a cam surface 31d, and the cam surface 31d is a pair of opposing wedge shapes with the inner peripheral surface of the input side housing 21. It is formed so that eight spaces are provided.

  Each output side roller 32 is formed in a cylindrical shape, and its diameter rotates forward and backward in a pair of opposing wedge-shaped spaces formed by the cam surface 31 d and the inner peripheral surface of the input side housing 21. It is configured to have play to enable it.

  The pinion gear 34 is formed so that its axial intermediate portion 34 a can be engaged with the engagement hole 31 a of the output cam 31, and its other axial end 34 b can be inserted into the hollow hole of the connecting shaft 24. Has been.

  The friction spring 36 functions as an elastic member for reducing torque input from the seat side via the pinion gear 34. The friction spring 36 is formed so that its inner peripheral side can engage with an axially intermediate portion 34 a of the pinion gear 34, and its outer peripheral side is elastically in contact with the inner peripheral surface of the input side housing 21.

  The rotation transmitting member 41 has an outer peripheral surface that is slidable on the inner peripheral surface of the input-side housing 21, and is formed so as to face the cam surface 27 c of the input-side cam 27 on the inner peripheral surface. . The rotation transmission member 41 includes a cylindrical portion 41a and eight pressing pieces 41b. Each pressing piece 41b is formed so as to protrude from one side end portion of the cylindrical portion 41a to the one side in the axial direction so that the corresponding output side roller 32 can be pressed by the side surface in the wedge-shaped space.

  The washer 42 is formed in a substantially disc shape, and has eight convex portions 42 a whose outer peripheral portions can be engaged between the pressing pieces 41 b of the rotation transmitting member 41.

  Next, the assembly of the clutch device 10 configured as described above will be described in detail with reference to the drawings. 4 is a cross-sectional view taken along the line 4-4 shown in FIG. FIG. 5 is a cross-sectional view taken along line 5-5 shown in FIG. FIG. 6 is a cross-sectional view taken along the line 6-6 shown in FIG. In FIG. 4 and FIG. 7 described later, for convenience of explanation, the bottom wall 21a of the input side housing 21 is omitted.

  As shown in FIGS. 3 and 4, the lever member 22 is configured such that each protruding piece 22 c abuts the inner peripheral surface of the spring body 23 a of the spring 23 on the inner surface or the outer surface, and the engagement hole 22 a is in the axial direction of the connecting shaft 24. By being engaged with the other end 24 a, it is rotatably assembled to the input housing 21 together with the spring 23. At this time, the protruding piece 21 e of the input side housing 21 is sandwiched between the hook portions 23 b of the spring 23.

  The reverse plate 25 is assembled so that the protruding piece 25a is sandwiched between the hook portions 23b of the spring 23 and the protruding piece 22b of the lever member 22 is engaged with the first slit 25b. The retainer 26 is assembled so that the protruding piece 26b engages with the second slit 25d of the reverse plate 25.

  As shown in FIGS. 3 and 5, on the outer peripheral side of each pressing piece 26 c of the retainer 26, a rotation transmitting member 41 with a washer 42 is assembled so as to slide on the inner peripheral surface of the input side housing 21. . Further, the input cam 27 is assembled on the inner peripheral side of each pressing piece 26 c of the retainer 26 so as to engage with the axial one side end 24 b of the connecting shaft 24. Each input side roller 28 is assembled so as to be sandwiched between the pressing pieces 26c in a pair of opposing wedge-shaped spaces formed between the inner peripheral surface of the cylindrical portion 41a and the cam surface 27c of the input side cam 27. It is done.

  As shown in FIGS. 3 and 6, the output cam 31 is assembled together with the friction spring 36 so as to engage with the axial intermediate portion 34 a of the pinion gear 34 through the engagement hole 31 a. The pinion gear 34 is inserted into the hollow hole of the connecting shaft 24 so as to be rotatable relative to the other end 34b in the axial direction. A spring 33 is engaged with each groove 31 c of the output cam 31, and each pressing piece 41 b and each output side roller 32 of the rotation transmitting member 41 are assembled between each projection 31 b and each spring 33. The clutch device 10 shown in FIG. 3 is completed by assembling the output side housing 35 and the input side housing 21 so that the axial one side end 34c of the pinion gear 34 projects coaxially from the output side housing 35. .

  Next, the operation of the input side member 20 and the like in the clutch device 10 configured as described above will be described in detail with reference to the drawings. FIG. 7 is an explanatory diagram for explaining the state of the input side member 20. FIG. 7A shows a state before the swing operation, and FIG. 7B shows a state during the swing operation. Show.

  When the operating lever 104 is not operated to swing and the input torque is not transmitted to the lever member 22, the output side roller 32 is formed between the cam surface 31 d of the output side cam 31 and the inner peripheral surface of the input side housing 21. It is pressed by the spring 33 against the wedge-shaped space. Thereby, the rotation of the pinion gear 34 is restricted, and the height of the seat cushion 102 is maintained. At this time, as shown in FIG. 7A, the reverse plate 25 does not swing.

  When the operation lever 104 is swung upward from the neutral position N in the upward direction U, the lever member 22 rotates clockwise as viewed from the input side (the front side in FIG. 7). In response to this rotation, the input side cam 27 rotates clockwise together with the connecting shaft 24. Further, in accordance with the rotation of the lever member 22, the vicinity of the first slit 25b of the reverse plate 25 that engages with the protruding piece 22b of the lever member 22 moves in the α direction (the direction along the clockwise direction) (FIG. 7). (See (B)). Due to the movement in the vicinity of the first slit 25 b, the reverse plate 25 swings in the β direction around the vicinity of the protruding piece 25 a sandwiched between both hook portions 23 b of the spring 23.

  Here, in the reverse plate 25, the first slit 25b is formed on the outer peripheral side of the protruding piece 25a, and the second slit 25d is formed on the inner peripheral side of the protruding piece 25a, so that the retainer that engages with the second slit 25d. The vicinity of the protruding piece 26b of 26 moves in the γ direction (a direction along the counterclockwise direction). Due to the movement in the vicinity of the protruding piece 26b, the retainer 26 rotates counterclockwise.

  In this way, the reverse plate 25 is formed so that the protruding piece 25a that is the center of the swing plate 25 and the first slit 25b that engages with the protruding piece 22b of the lever member 22 are close to each other. The reverse plate 25 is greatly swung with respect to the movement in the vicinity. For this reason, the movement of the retainer 26 engaged with the second slit 25d in the vicinity of the protruding piece 26b increases, and the rotation angle of the retainer 26 increases.

  By the rotation of the retainer 26 as described above, each pressing piece 26c causes the input side roller 28 to move to the cam surface 27c that forms a wedge-shaped space on the counterclockwise direction and the inner peripheral surface of the cylindrical portion 41a of the rotation transmitting member 41. As a result of the pressing, the input side cam 27 rotates integrally with the rotation transmission member 41 via each input side roller 28. Therefore, the input torque is transmitted to the output side member 30 via the lever member 22, the connecting shaft 24, the input side cam 27, each input side roller 28, and the rotation transmission member 41.

  When the input torque disappears, the lever member 22 and the reverse plate 25 are urged by the spring 23, so that the lever member 22, the connecting shaft 24, and the input side cam 27 rotate counterclockwise to the neutral position. At the same time, the reverse plate 25 swings in the neutral direction (the direction opposite to the β direction), so that the retainer 26 rotates clockwise and returns to the neutral position. Thus, when the input side cam 27 rotates counterclockwise and the retainer 26 rotates clockwise, each input side roller 28 is not pressed into the wedge-shaped space by each pressing piece 26c. The rotation is not transmitted to the rotation transmission member 41. It should be noted that the input torque is similarly transmitted to the output side member 30 when the lever member 22 rotates counterclockwise according to the input torque.

  As described above, in the clutch device 10 according to the present embodiment, the protruding piece 22b of the lever member 22 is engaged with the first slit 25b of the reverse plate 25 and the protruding piece 26b of the retainer 26 is the first of the reverse plate 25. The two slits 25d are engaged. The lever member 23 is biased to the neutral position by the inner surface or the outer surface of each protruding piece 22c coming into contact with the spring main body 23a of the spring 23. Further, the protruding piece 25 a of the reverse plate 25 is biased to the neutral position by being sandwiched between both hook portions 23 b of the spring 23. Moreover, in the reverse plate 25, the 1st slit 25b is formed in the outer peripheral side of the protrusion piece 25a, and the 2nd slit 25d is formed in the inner peripheral side of the protrusion piece 25a. A wedge-shaped space is provided between the cam surface 27 c of the input side cam 27 to which the rotation of the lever member 22 is transmitted and the inner peripheral surface of the cylindrical portion 41 a of the rotation transmitting member 41, and the retainer 26. Each pressing piece 26c is interposed between the input side rollers 28 accommodated in each wedge-shaped space.

  Thus, in order to return only the input side member 20 to the neutral position when the input torque is lost, the lever member 22 and the retainer 26 are biased to the neutral position only by the reverse plate 25 and the spring 23. For this reason, it is not necessary to provide the urging member for urging the lever member 22, the retainer 26, etc. to the neutral position. Further, each input side roller 28 is pressed against the cam surface 27c forming the wedge-shaped space by the respective pressing pieces 26c of the retainer 26 and the inner peripheral surface of the cylindrical portion 41a of the rotation transmitting member 41, so that each input side roller There is no need to separately provide a cage for holding 28.

  Therefore, the number of parts of the input side member 20 that returns to the neutral position when the input torque is eliminated can be reduced. In addition, the manufacturing cost can be reduced and the size can be reduced by reducing the number of parts.

  In the clutch device 10 according to the present embodiment, the reverse plate 25 is formed such that the protruding piece 25a and the first slit 25b are close to each other. In this way, by bringing the protruding piece 25a, which is the center of the swing of the reverse plate 25, and the first slit 25b close to each other, the swing of the reverse plate 25 increases with respect to the movement in the vicinity of the first slit 25b. The rotation angle of 26 increases. Thereby, even if a play for enabling forward / reverse rotation is provided between each input side roller 28 and the input side cam 27, the rotation of the lever member 22 is immediately transmitted to the output side member 30. The operability of the clutch device 10 can be improved.

  Further, the seat device 100 according to the present embodiment includes the seat cushion 102, the seat back 103, and the clutch device 10, and the height of the seat cushion 102 is adjusted according to the rotation transmitted from the output side member 30. . As a result, the seat device 100 can be realized that enjoys the operation and effect such that the number of parts of the input side member 20 that returns to the neutral position when the input torque is eliminated can be reduced.

In addition, this invention is not limited to the said embodiment, You may actualize as follows, and even in that case, an effect | action and effect equivalent to the said embodiment are acquired.
(1) The number of input side rollers 28 is not limited to six, and may be seven or more or five or less. In this case, the cam surface 27c of the input side cam 27 and the protruding piece 26b of the retainer 26 are formed according to the number of input side rollers 28 that have been changed. Further, the number of the output side rollers 32 can be similarly changed.

(2) The clutch device 10 according to the present invention is not limited to being applied to the vehicle seat device 100 described above, and transmits the rotation of the input side member due to the input torque to the output side member, and the input torque disappears. As a device for returning only the input side member to the neutral position, it may be applied to other height adjusting devices and the like.

1 is a side view showing a vehicle seat device to which a clutch device according to the present invention is applied. It is a disassembled perspective view of a clutch apparatus. It is sectional drawing of a clutch apparatus. It is sectional drawing by the cut surface equivalent to 4-4 lines shown in FIG. It is sectional drawing by the cut surface equivalent to the 5-5 line shown in FIG. FIG. 6 is a cross-sectional view taken along line 6-6 shown in FIG. It is explanatory drawing for demonstrating the state of an input side member, FIG. 7 (A) shows the state before rocking | fluctuation operation, FIG.7 (B) shows the state in rocking | fluctuation operation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Clutch apparatus 20 ... Input side member 21 ... Input side housing 22 ... Lever member 22b ... Projection piece (1st projection piece)
23 ... Spring (biasing member)
25. Reverse plate (rotation direction changing member)
25a ... protruding piece (second protruding piece)
25b ... 1st slit 25d ... 2nd slit 26 ... Retainer 26b ... Projection piece (3rd projection piece)
26c ... Pressing piece 27 ... Input side cam 27b ... Protrusion 27c ... Cam surface 28 ... Input side roller (engagement element)
DESCRIPTION OF SYMBOLS 30 ... Output side member 41 ... Rotation transmission member 41a ... Cylindrical part 41b ... Pressing piece 100 ... Vehicle seat apparatus 102 ... Seat cushion (seat)
103 ... seat back (seat)
104 ... Control lever

Claims (3)

In the clutch device that transmits the rotation of the input side member due to the input torque to the output side member and returns only the input side member to the neutral position when the input torque disappears,
The input side member is
A lever member that is rotatably supported with respect to the housing and rotates in accordance with the input torque, the lever member having a first protruding piece that protrudes in one axial direction;
A second projecting piece projecting to the other side in the axial direction is formed, and a first slit that can be engaged with the first projecting piece is formed on an outer peripheral side of the second projecting piece. A rotation direction changing member in which a second slit is formed on the inner peripheral side;
A biasing member for biasing the lever member and the second protruding piece to a neutral position with respect to the housing;
A retainer having a plurality of pressing pieces projecting from the outer periphery to one side in the axial direction and a third projecting piece projecting to the other side in the axial direction so as to be engageable with the second slit;
An input side cam capable of transmitting the rotation of the lever member via a connecting shaft to the output side member via a plurality of engagement elements and a rotation transmission member, the cam surface and the inner periphery of the rotation transmission member An input side cam in which the cam surface is formed so that a wedge-shaped space can be provided between each surface to accommodate each of the engagement elements;
With
The first protruding piece is engaged with the first slit and the third protruding piece is engaged with the second slit,
The lever member and the second projecting piece are biased to the neutral position by the biasing member,
The clutch device according to claim 1, wherein the pressing pieces are interposed between the engaging elements accommodated in the wedge-shaped spaces.   The clutch device according to claim 1, wherein the rotation direction conversion member is formed such that the second projecting piece and the first slit are close to each other.   A seat device comprising a seat and the clutch device according to claim 1, wherein the height of the seat is adjusted according to the rotation transmitted from the output side member.

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