JP2004338426A - Height adjusting apparatus of seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional apparatus wherein entire height is large, the clearance between an operation lever and a door inner panel, and operability of the lever degrades. <P>SOLUTION: A ratchet mechanism 5 comprises a stopper member fixed to a clutch brake mechanism 6 in a base member 1, a cam member 15 that is locked with a rotary drum 3 to simultaneously rotate, is regulated in maximum rotation position by the stopper member, and has a cam surface 16 on the inner periphery, a rotor 17 interlocked with the clutch brake mechanism, a pair of rollers 19a and 19b disposed in a wedge-like space 18 formed between the outer peripheral surface of the rotor and the cam surface, and a spring 20 for energizing both rollers toward the ends of the wedge-like space. A torsion spring 4 for energizing the rotary drum to a rotation neutral position is disposed between the inner peripheral surface of the rotary drum and the outer peripheral surface of the cam member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a height adjustment device for a vehicle seat, and more particularly to a driving mechanism for a ratchet type seat lifter in a seat device.
[0002]
[Prior art]
Recently, in a vehicle seat device, a seat height adjustment device capable of freely adjusting the entire or front or rear portion of a seat cushion so as to be able to freely raise and lower from a vehicle body floor surface so as to ensure an optimal driving posture and a sitting posture of an occupant. Is provided.
[0003]
As this height adjusting device, there is an electric type using an electric motor, but since such an electric type device tends to be expensive, it is described in Patent Document 1 below that operates a knob or a lever. The manual type is common.
[0004]
This manual type height adjusting device is attached to a side panel of a seat device, and includes a ratchet mechanism and a brake mechanism arranged in a superposed state on the ratchet mechanism in the unit. The sector gear that engages with the pinion on the gear shaft side can rotate forward and reverse, and the interlocking lever connected to this sector gear rotates forward and reverse the link that supports the seat cushion on the floor of the vehicle body. The link raises and lowers the entire seat cushion, or raises and lowers the seat cushion by rotating the front and rear links of the seat cushion only in the forward and reverse directions.
[0005]
[Patent Document 1]
JP-A-2002-54658
[0006]
[Problems to be solved by the invention]
By the way, in the conventional height adjusting device, the brake mechanism and the ratchet mechanism are formed to have substantially the same diameter, so that the entire outer diameter is reduced to reduce the size, but the operation lever is set to the neutral position. The height tends to be relatively large due to the arrangement of the returning spring and the like. In particular, the side panel of the seat device is operated in conjunction with the large height of the height adjustment device because the mounting surface of the height adjustment device is set one step higher than the surrounding height in order to secure rigidity. The protrusion amount of the lever becomes large.
[0007]
As a result, the space between the operation lever and the inner panel of the vehicle door is reduced, resulting in a technical problem that the operability of the operation lever by the occupant is deteriorated.
[0008]
[Means for Solving the Problems]
The present invention has been devised in view of the technical problem of the conventional height adjusting device, and the invention according to claim 1 has a gear rotatably penetrating substantially the center of a base member fixed to a seat. A shaft, a rotating drum rotatably provided on the base member, and an operation lever attached to an outer surface, and a spring member for urging the operation lever to a neutral position in an operation rotation direction via the rotation drum. A ratchet mechanism disposed between the base member and the rotary drum and configured to rotate the gear shaft in the same direction as the rotary drum rotates in one direction; and a ratchet mechanism disposed between the base member and the ratchet mechanism. A height adjusting device for a vehicle seat, comprising: a clutch brake mechanism for controlling reversal of the gear shaft associated with operation of the ratchet mechanism in cooperation with the gear shaft. The structure includes a stopper member fixed to the base member via an outer drum of a clutch brake mechanism, and a substantially annular shape in which the stopper member locks and rotates synchronously and the maximum rotational position is regulated by the stopper member. A cam member, a cam surface formed on an inner peripheral surface of an annular hole formed substantially at the center of the cam member, and a rotation interlocked with the clutch brake mechanism, which is rotatably disposed in the annular hole. A member, at least a pair of rotating members rotatable in a circumferential direction in a wedge-shaped space formed between an outer peripheral surface of the rotating member and the cam surface, and both members disposed between the rotating members; A spring for urging the rotating body toward an end of the wedge-shaped space, wherein the spring member is disposed between an inner peripheral surface of the rotating drum and an outer peripheral surface of the cam member, and one end of the spring member is provided. Part with the stopper With locking the timber, it engages the other end to said cam member, and characterized in that urges the rotary drum to a neutral position of the operating direction of rotation.
[0009]
Therefore, according to the present invention, the outer diameter of the ratchet mechanism is made larger and thinner than that of the conventional device, and the spring member for neutral bias is formed with the inner peripheral surface of the relatively large-diameter rotary drum. Since it is arranged between the cam member and the outer peripheral surface, the mounting position of the operation lever can be lowered.
[0010]
According to a second aspect of the present invention, a gear shaft rotatably penetrating substantially the center of a base member fixed to a seat, and a rotary shaft rotatably provided on the base member and having an operation lever attached to an outer surface thereof. A drum, a spring member for urging the operation lever to a neutral position in the operation rotation direction via the rotation drum, and a rotation member disposed between the base member and the rotation drum for rotating the rotation drum in one direction; And a ratchet mechanism that rotates the gear shaft in the same direction, and is disposed between the base member and the ratchet mechanism, and is linked with the gear shaft to regulate the reversal of the gear shaft accompanying the operation of the ratchet mechanism. A height adjusting device for a vehicle seat, comprising a clutch brake mechanism, wherein the ratchet mechanism includes a cam surface formed on an inner peripheral surface of the rotary drum, and a clutch member mounted on the base member. A center stopper fixed to the outer drum of the brake mechanism, a ring member rotatably superimposed on the center stopper, locked to the rotating drum and synchronously rotated, and rotatably disposed inside the rotating drum. A rotating member interlocked with the clutch brake mechanism, at least one pair of rotating bodies rotatable in a circumferential direction in a wedge-shaped space formed between an outer peripheral surface of the rotating member and the cam surface, A spring that is disposed between the two rotating bodies and biases the two rotating bodies toward an end of the wedge-shaped space; and a spring that is disposed on an end face side of the rotating member while being restricted from rotating by the center stopper. A regulating member that abuts the one rotating body with the rotating operation of the rotating drum and presses the other rotating body toward the end of the wedge-shaped space via the spring. The spring member is disposed and housed inside the center stopper and the ring member, and one end of the spring member is locked to the center stopper, and the other end is locked to the ring member. The rotary drum is biased to a neutral position in the operation rotation direction.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a height adjusting device for a vehicle seat according to the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is an exploded perspective view showing an apparatus according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the apparatus, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. FIGS. 5 to 9 are sectional views taken along line BB, and FIGS.
[0013]
As shown in FIG. 1, the height adjusting device includes a base member 1 fixed to a side panel (not shown) of a seat device in a vehicle, a gear shaft 2 rotatably inserted through the base member 1, and A rotating drum 3 rotatably provided on the base member 1 via the gear shaft 2 and having an operation lever (not shown) attached to an outer surface thereof; An annular torsion spring 4 which is a spring member for biasing to a neutral position, and is disposed between the base member 1 and the rotary drum 3. And a ratchet mechanism 5 for rotating the gear shaft 2 in the same direction, and being interposed between the base member 1 and the ratchet mechanism 5, and linked to the gear shaft 2 to restrict the reversal of the gear shaft 2 accompanying the operation of the ratchet mechanism 5. Do clutch break And a mechanism 6.
[0014]
The base member 1 is formed in a substantially disk shape, a through hole 1a through which the other end of the gear shaft 2 penetrates is formed in the center, and four mounting flanges 1b are formed in the outer peripheral edge. Six bent claws 1c are formed between the mounting flanges 1b so as to rise and bend substantially at right angles.
[0015]
The gear shaft 2 has a flange 2a seated on the edge of the through hole 1a at one end, and a pinion gear 2b meshing with a gear in the seat device. Are formed with a rectangular engaging projection 2c, a stepped middle diameter portion 2d and a small diameter portion 2e.
[0016]
As shown in FIGS. 1 and 2, the rotary drum 3 has a circular cup shape whose outer diameter D is larger than the outer diameter d on the clutch brake mechanism 6 side, and the gear shaft 2 is provided at the center of the bottom wall. A fixing hole 3a into which the tip small diameter portion 2e is engaged and fixed by crimping is formed, and three insertion holes through which three bolts 7 for attaching an operation lever (not shown) are inserted around the fixing hole 3a. 3b is formed through. In addition, four large and small rectangular notches 3c for locking are formed at the leading edge of the peripheral wall.
[0017]
As shown in FIGS. 1 to 3, the clutch brake mechanism 6 has a cylindrical outer drum 8 disposed in contact with the base member 1, and is rotatable inside the outer drum 8 via the gear shaft 2. A five-wedge-shaped space 10 formed between the outer surface of each side of the rotor cam 9 and the inner peripheral surface of the outer drum 8, and each of the wedge-shaped spaces 10 A pair of rollers 11a, 11b respectively disposed in the inside and a flattened member which is elastically mounted between the rollers 11a, 11b and biases the rollers 11a, 11b toward an end portion which becomes a narrow space of the wedge-shaped space 10. It comprises a coil spring 12 and a release member 13 which is fitted from the outside of the rotor cam 9 to relatively press the rollers 11a and 11b in the circumferential direction or releases the press.
[0018]
The outer drum 8 has a flange 8a integrally formed at one end edge of the cylindrical main body on the base member 1 side, and a fitting groove to be fitted to a bent claw 1c of the base member 1 at an outer peripheral edge of the flange 8a. 8b are formed. Further, at the other end edge of the cylindrical main body, five engagement grooves 8c are formed with which a later-described lever-side stopper of the ratchet mechanism 5 is engaged.
[0019]
In the rotor cam 9, a rectangular press-fitting hole 9a into which the engaging protrusion 2c of the gear shaft 2 is press-fitted and connected is formed substantially in the center, and the release member 13 is provided at a center position of each side. Fitting grooves 9b to be fitted with rattling are formed respectively.
[0020]
The release member 13 is formed in a substantially pentagonal shape, and is formed at a substantially central position with an insertion hole 13a through which the middle diameter portion 2d of the gear shaft 2 is inserted, and a radially cutout inner periphery of the insertion hole 13a. Three locking holes 13b are formed to penetrate, and five pressing claws 13c for pressing the outer edges of the rollers 11a and 11b are formed at respective top positions at substantially right angles in the direction toward the base member 1. ing. At approximately the center of each side, a protrusion 13d is formed, which is fitted into the fitting groove 9b of the rotor cam 9 and is rotatable integrally with the rotor cam 9. A slight gap C is formed in the circumferential direction between the projection 13d and the fitting groove 9b.
[0021]
As shown in FIGS. 1, 2, and 4, the ratchet mechanism 5 is related to a lever-side stopper 14, which is a stopper member fixed to the base member 1 via the outer drum 8, and the rotary drum 3. A substantially annular cam member 15 that stops and rotates synchronously and whose maximum rotational position is regulated by the lever stopper 14, and is formed on an inner peripheral surface of a circular hole 15 a formed substantially in the center of the cam member 15. A rotor 17 which is a rotatable member which is rotatably disposed in the circular hole 15a and is interlocked with the clutch / brake mechanism 6, and between the outer peripheral surface of the rotor 17 and the cam surface 16; Are disposed in a wedge-shaped space 18 formed in a pair of rollers 19a and 19b, which are a pair of left and right rotating bodies rotatable in a circumferential direction, and are disposed between the rollers 19a and 19b. Roller 19a, and is configured to 19b from the coil spring 20 for urging the end portion direction of the narrow space the wedge-shaped space 18.
[0022]
The lever-side stopper 14 is formed in an annular shape, and a tip portion is bent substantially at a right angle to an inner peripheral edge of a large-diameter hole formed in the center, and the edge appropriately presses the one roller 19a. The two pressing arms 21 are projected at approximately 120 ° in the circumferential direction, while the outer peripheral edge of the pressing arm 21 is engaged with each of the engaging grooves 8c of the outer drum 8 to restrict the rotation thereof. Five projections 22 and 23 are provided integrally. A stopper piece 24 is bent at a right angle to the cam member 15 at the leading edge of each of the three large protrusions 22, while the two narrow protrusions 23 are formed such that their leading ends are formed on the outer periphery of the outer drum 8. It protrudes relatively large from the surface in the radial direction.
[0023]
The cam member 15 has a main body formed in a substantially annular shape, the plurality of cam surfaces 16 formed on an inner peripheral surface of the large-diameter circular hole 15a, and an outer peripheral edge on one end side of the main body. Two large protrusions 26, 26 and two small width protrusions 27, 27, which abut against one side edge of each stopper piece 24 of the lever side stopper 14 from the rotation direction to regulate the maximum rotation position of the stopper piece 14, are circular. The projection is provided at about 90 ° in the circumferential direction along the radial direction. When the four protrusions 26 and 27 have their tips locked in the locking notches 3 c of the rotary drum 3, respectively, and when the rotary drum 3 is rotated, the respective protrusions 26 and 27 become The cam member 15 rotates synchronously via the notch 3c for locking.
[0024]
The rotor 17 is formed in an annular shape, and has a support hole 17a formed at an inner central position through which the middle diameter portion 2d of the gear shaft 2 is rotatably inserted, and near a hole edge of the support hole 17a on one end surface. In addition, locking projections 17b which are respectively locked in the locking holes 13b of the release member 13 and transmit the rotational force of the rotor 17 to the release member 13 are provided integrally.
[0025]
As shown in FIGS. 1 and 2, the torsion spring 4 is triple-twisted and disposed between the inner peripheral surface of the rotary drum 3 and the outer peripheral surface of the main body of the cam member 15 in the axial direction. The bent one end 4a is resiliently held inside the one narrow projection 27 of the cam member 15, that is, on one side edge of the cam member 15 that is not in contact with the lever-side stopper 14, and also in the same direction. The bent other end 4b is resiliently held by one side edge of the small-width projection 23 located on the small-width projection piece 27 side of the lever-side stopper 14 where the lever-side stopper 14 is fixed, the diameter is reduced, and the spring force is applied in the expanding direction. Is working. Therefore, the rotary drum 3 is urged to the neutral position in the rotational direction by the spring force of the torsion spring 4 via the lever-side stopper 14 and the cam member 15.
[0026]
Hereinafter, the operation of the present embodiment will be described. That is, first, when the operating lever is not operated, as shown in FIGS. 5A and 5B, the rotating drum 3 is held at the neutral position in the rotating direction by the spring force of the torsion spring 4 as described above. When the lever is operated to rotate the rotary drum 3 slightly counterclockwise in the drawing as shown by an arrow in FIG. 6A against the spring force of the torsion spring 4, the cam member 15 also rotates in the same direction accordingly. I do.
[0027]
Therefore, as the cam surface 25 rotates in the same direction, the cam surface 25 presses one of the rollers 19 b toward the end of the wedge-shaped space 18, and the frictional force generated by the roller 19 b causes the cam member 15 to rotate. The torque is transmitted to the rotor 17. Accordingly, the rotor 17 rotates in the same direction, and as shown in FIG. 6B, the release member 13 rotates in the same direction. At this time, the other roller 19a does not move by contacting the pressing arm 21 of the lever-side stopper 14, and the roller 19b compresses the coil spring 20 and moves toward the center of the wedge space 18.
[0028]
Further, the release member 13 rotates each roller 11a on one side in the same direction against the spring force of the coil spring 12 by each pressing claw 13c. Thus, the connection between the rotor cam 9 and the outer drum 8 by the rollers 11a and 11b is released. At this time, the rotational force is not transmitted to the rotor cam 9 because the protrusion 13d of the release member 13 is merely rotating in the gap C between the release member 13 and the fitting groove 9b of the rotor cam 9.
[0029]
When the rotary drum 3 is further rotated in the same direction as shown in FIG. 7A, as shown in FIG. 7B, each convex portion 13d of the release member 13 loses the gap C and contacts the inner surface of each fitting groove 9b. Since the rotor cam 9 is pressed while contacting, a rotational force is transmitted to the rotor cam 9 and the rotor cam 9 rotates. Accordingly, the gear shaft 2 press-fitted to the rotor cam 9 rotates to operate the sector gear in the seat device via the pinion gear 2b.
[0030]
When the rotating drum 3 is further rotated, as shown in FIG. 8A, each of the protrusions 26 and 27 of the cam member 15 finally comes into contact with each of the protrusions 22 and 23 of the lever-side stopper 14 and the cam member Regulate 15 more rotations. Therefore, the maximum rotation position of the operation lever is regulated via the rotating drum 3. Therefore, the rotor cam 9 also rotates to the maximum position via the release member 3 as shown in FIG.
[0031]
At this point, the roller 11a on one side is pressed by the pressing claws 13c of the release member 13 as described above, but the other roller 11b is at the end of the wedge-shaped space 10 as shown in FIG. 8B. The part is in a free state without being pressed in the biting direction.
[0032]
Thereafter, when the operation is released by releasing the hand from the operation lever, the cam member 15 is turned clockwise by the spring force of the torsion spring 4 as shown in FIG. 9A. Accordingly, with this reversal, each roller 19a moves from the center to the end of the wedge space 18, but since it does not perform the wedge action, the pressing force on the rotor 17 is released and the other rollers 19a are released. Since 19b is also in a free state, the wedge effect of the cam surface 16 is lost, and the frictional connection between the cam member 15 and the rotor 17 is released. Therefore, the rotation transmitting force in the reverse direction to the rotor 17 is not generated. Therefore, only the cam member 15 and the rotating drum 3 are inverted by the spring force of the torsion spring 4.
[0033]
Then, by repeatedly rotating the operation lever, the gear shaft 2 is sequentially rotated in the same direction, and the sector gear in the seat device is driven to elevate the seat cushion, for example.
[0034]
At this time, the transmission of the rotational force to the rotor cam 9 is cut off by the clutch brake mechanism 6, so that the rollers 11 a and 11 b are pushed into the respective end portions of the wedge-shaped space 10 by the spring force of the coil spring 12. As a result, the gear shaft 2 is reliably restricted from rotating forward and reverse.
[0035]
On the other hand, when the operation lever held at the neutral position in the rotation direction by the torsion spring 4 is repeatedly rotated in the reverse direction (clockwise), for example, the ratchet mechanism 5 and the clutch brake mechanism 6 operate in the opposite manner to the above. By rotating the gear shaft 2 in the opposite direction, the seat cushion can be lowered.
[0036]
As described above, according to the present embodiment, the seat cushion can be efficiently moved up and down by the respective operations of the ratchet mechanism 5 and the clutch brake mechanism 6 arranged in the overlapped state.
[0037]
Moreover, the outer diameter of the rotary drum 3 and the cam member 15 is formed to be relatively large, and the torsion spring 4 is disposed between the outer peripheral surface of the main body of the cam member 15 and the inner peripheral surface of the rotary drum 3. Therefore, it is possible to increase the diameter of the ratchet mechanism 5 in accordance with the side panel and to reduce the thickness. As a result, the gap between the operation lever and the inner panel of the door can be increased, so that the operability of the operation lever can be improved and the degree of freedom in the layout of the mounting position of the operation lever with respect to the rotary drum 3 can be improved. Is improved.
[0038]
FIGS. 10 and 11 are exploded perspective views of a device according to a second embodiment of the present invention, in which the clutch brake mechanism 6 is substantially the same as the previous embodiment, and the structure of the ratchet mechanism 5 and the torsion spring 34 are shown. The arrangement of is changed.
[0039]
That is, the base member 31 is formed in a substantially disk shape, a through hole 31a through which the other end of the gear shaft 32 penetrates is formed in the center, and four mounting flanges 31b are formed on the outer peripheral edge. Six bent claws 31c are formed between the mounting flanges 31b so as to rise and bend substantially at right angles.
[0040]
In the gear shaft 32, a flange portion 32a seated at a hole edge of the through hole 31a and a pinion gear 32b meshing with a gear in a seat device are integrally formed at one end portion, and the other end portion side. Are formed with a gear tooth-shaped engaging projection 32c, a step-shaped medium-diameter portion 32d and a cylindrical small-diameter portion 32e.
[0041]
As shown in FIGS. 10 and 11, the rotary drum 33 has a circular cup shape, and has a fixing hole 33 a at the center of the bottom wall, into which the small end portion 32 e of the gear shaft 32 is engaged and caulked. In addition, three insertion holes 33b through which three unillustrated bolts for attaching an unillustrated operation lever are inserted are formed around the fixing hole 33a. Further, two rectangular locking projections 33c are formed on the distal end edge of the peripheral wall, and a cam surface 33d is formed on the inner peripheral surface of the peripheral wall.
[0042]
The clutch brake mechanism 6 includes a cylindrical outer drum 38 disposed in contact with the base member 31, a rotor cam 39 rotatably housed inside the outer drum 38 via the gear shaft 32, A plurality of wedge-shaped spaces 40 formed between a cam surface 39a formed on the outer surface of the outer drum 39 and the inner peripheral surface of the outer drum 38, and a pair of rollers 41a respectively disposed in each of the wedge-shaped spaces 40 , 41b and a spring 42 in the form of a bent plate which is elastically mounted between the rollers 41a, 41b and biases the rollers 41a, 41b in the direction of the narrow end of the wedge-shaped space 40. A release member 43 fitted from the outside and pressing the rollers 41a and 41b relatively from the circumferential direction or releasing the pressing.
[0043]
The outer drum 38 has a flange 38a integrally formed on one end edge of the cylindrical main body on the base member 31 side, and a fitting groove for fitting the bent claw 31c of the base member 31 on the outer peripheral edge of the flange 38a. 38b are formed respectively. Further, at the other end edge of the cylindrical main body, five engagement grooves 38c with which a later-described center stopper 44 of the ratchet mechanism 5 engages are formed.
[0044]
In the rotor cam 39, the cam surface 39a is formed in a substantially octagonal shape, and a rectangular press-fitting hole 39b into which the engaging protrusion 32c of the gear shaft 32 is press-fitted is formed at the center thereof. The wedge-shaped space 40 is formed between the outer peripheral surface and the inner peripheral surface of the outer drum 38.
[0045]
The release member 43 is formed in a substantially disk shape, has an insertion hole 43a formed at a substantially central position through which the middle diameter portion 32d of the gear shaft 32 is inserted, and a ratchet mechanism 5 at an inner peripheral edge of the insertion hole 43a. The six engaging claws 43b that engage with the rotor 47 described later are bent at equal intervals in the circumferential direction. Six pressing claws 43c for pressing the outer edge from the circumferential direction of the rollers 41a and 41b are formed on the outer peripheral portion corresponding to the engaging claws 43b at substantially right angles in the direction toward the base member 31. At the same time, between the pressing claws 43c, six guide pieces 43d, which are rotationally guided on the inner peripheral surface of the outer drum 38, are protruded in the radial direction.
[0046]
The ratchet mechanism 5 is synchronously rotated with a center stopper 44 fixed to the base member 31 via the outer drum 38, and is also locked to the rotating drum 33, and the maximum rotational position is regulated by the center stopper 44. A substantially annular center ring 45, an annular roller stopper 46 made of synthetic resin disposed on the center ring 45, and a rotatably disposed side surface of the roller stopper 46. And a pair of left and right rotating bodies 4 disposed in a wedge-shaped space 48 formed between the outer peripheral surface of the rotor 47 and the cam surface 46 and rotatable in the circumferential direction. A pair of rollers 49a, 49b and a pair of rollers 49a, 49b are disposed between the pair of rollers 49a, 49b. And a coil spring 50 for urging the end portion direction of the space.
[0047]
As shown in FIG. 10, the center stopper 44 is formed in an irregularly-shaped annular shape, and has arc-shaped large-diameter portions 44a, 44a at upper and lower ends in the drawing, and a constricted arc-shaped small-diameter portion 44b at both sides in the drawing. , 44b, and the connecting portions 44c of the large diameter portions 44a and the small diameter portions 44b are engaged with the engaging grooves 38c of the outer drum 38 and are prevented from rotating. A projection 44d is provided integrally on a part of the inner peripheral edge of the large diameter portion 44a. Further, the locking projections 33c, 33c of the rotary drum 33, which are rotatably slidably engaged between the opposed step projections 44e, 44f of the large diameter sections 44a, 44a, respectively, are the step projections 44e. , 44f, the maximum rotational position is regulated.
[0048]
The center ring 45 is formed in a thin annular shape, and has two locking grooves 45a formed on the outer peripheral edge thereof so that the locking protrusions 33c of the rotating drum 33 are locked and rotated synchronously. A projection 45b is provided integrally on the inner peripheral edge.
[0049]
The roller stopper 46 has a substantially semi-annular convex portion 46 a fitted on the inner peripheral surface of the center stopper 44 at the inner peripheral edge of the large-diameter hole on one side surface of the center ring 45. A fitting projection 46b that fits into one engagement portion 44g of the center stopper 44 and is prevented from rotating is integrally provided at a central position in the circumferential direction of the portion 46a. Further, on the outer peripheral edge of the other side surface, four restricting convex portions 46c for restricting the movement of the one-side roller 49a from the circumferential direction are integrally provided at 90 ° angular positions.
[0050]
The rotor 47 is formed in a substantially disk shape, and has a gear tooth-shaped serration groove 47a formed at an inner central position thereof so that the medium diameter portion 32d of the gear shaft 32 meshes with a predetermined gap in a loose fit state. In the vicinity of the hole edge of the serration groove 47a on one end surface, an engagement protrusion 47c that is engaged with each of the engagement claws 43b of the release member 43 and transmits the rotational force to the release member 43 is integrally provided. . A thin annular holding member 51 that supports one end of each of the rollers 49a and 49b is disposed between the rotor 47 and the bottom wall of the rotating drum 33.
[0051]
As shown in FIGS. 10 to 12, the torsion spring 34 is double-wound and twisted, accommodated inside the center stopper 44 and the center ring 45, and bent in the axial direction. One end 34a is elastically held by one side edge of the projection 44d of the center stopper 44 in the fixed state, and the other end 34b bent in the same direction is also rotatable. It is held by one side edge of the 45 projections 45b. Therefore, the rotary drum 33 is urged to the neutral position in the rotational direction by the spring force of the torsion spring 34 via the center ring 45.
[0052]
Hereinafter, the operation of the present embodiment will be described. That is, first, when the operation lever is not operated, as shown in FIGS. 13A and 13B, the rotating drum 33 is held at the neutral position in the rotation direction by the spring force of the torsion spring 34 as described above. When the lever is operated to slightly rotate the rotating drum 33 in the counterclockwise direction as shown by the arrow in FIG. 14A, the center ring 45 also rotates in the same direction against the spring force of the torsion spring 34. .
[0053]
As the cam surface 33d rotates in the same direction due to the rotation of the rotary drum 33, the cam surface 33d presses one of the rollers 49b toward the end of the wedge-shaped space 48, and is rotated by the frictional force generated by the rollers 49b. The force is transmitted to the rotor 47. Therefore, the rotor 47 rotates in the same direction to rotate the release member 43 in the same direction as shown in FIG. 14B, and the release member 43 further pushes each roller 41a on one side of the spring 42 by each pressing claw 43c. Rotate in the same direction against spring force. Thus, the connection between the rotor cam 39 and the outer drum 38 by the rollers 41a and 41b is released. At this time, as shown in FIG. 14A, the rotor 47 does not transmit the rotational force to the gear shaft 32 because each serration groove 47c only rotates in the gap between the serration groove 47c and the middle diameter portion 32d of the gear shaft 32. .
[0054]
As shown in FIG. 15A, when the rotating drum 33 is further rotated in the same direction, as shown in FIG. 15B, the groove surface of the serration groove 47a of the rotor 47 eliminates the gap and the serration convex portion of the medium diameter portion 32d. Therefore, the rotational force is transmitted to the gear shaft 32. Therefore, with the rotation of the gear shaft 32, the sector gear in the seat device is operated via the pinion gear 2b.
[0055]
When the rotating drum 33 is further rotated, as shown in FIGS. 16A and 16B, the two locking projections 33 c and 33 c of the rotating drum 33 finally have the tip ends of the stepped projections 44 e of the center stopper 44. 44f to restrict further rotation of the rotating drum 33. Therefore, the maximum rotation position of the operation lever is regulated via the rotating drum 33. Therefore, the rotor 47 also rotates to the maximum position, and the gear shaft 32 rotates greatly.
[0056]
At this point, as described above, the cam surface 33d presses one of the rollers 49a toward the end of the wedge-shaped space 48, while the other roller 49b presses the regulating protrusion 46c of the roller stopper 46. It is in a free state in contact with, that is, without being pressed in the biting direction.
[0057]
Thereafter, when the operation is released by releasing the operation lever, the center ring 45 and the rotating drum 33 are turned clockwise by the spring force of the torsion spring 34 as shown in FIG. 17A. Accordingly, since the pressing force on each roller 49a is released and the other roller 49b is also free in accordance with the reversal, the wedge effect of the cam surface 46 is lost, and the friction between the rotating drum 33 and the rotor 47 is reduced. The bond is released. Therefore, the rotation transmitting force in the reverse direction to the rotor 47 is not generated. Therefore, only the center ring 45 and the rotating drum 33 are reversed by the spring force of the torsion spring 34 and return to the neutral position.
[0058]
By repeatedly rotating the operation lever, the gear shaft 32 is sequentially rotated in the same direction, and the sector gear in the seat device is driven to raise the seat cushion, for example.
[0059]
At this time, since the transmission of the rotational force to the rotor 47 is interrupted, the rollers 41a and 41b of the clutch brake mechanism 6 are pushed into the respective ends of the wedge-shaped space 40 by the spring force of the spring 42. As a result, the free and forward rotation of the gear shaft 32 is reliably restricted.
[0060]
On the other hand, when the operation lever held at the neutral position in the rotation direction by the torsion spring 34 is repeatedly rotated in the reverse direction (clockwise direction), for example, the ratchet mechanism 5 and the clutch brake mechanism 6 operate in the opposite manner to the above. The seat cushion can be lowered by rotating the gear shaft 32 in the opposite direction.
[0061]
As described above, according to the present embodiment, the seat cushion can be efficiently moved up and down by the respective operations of the ratchet mechanism 5 and the clutch brake mechanism 6 arranged in the overlapped state.
[0062]
In addition, since the torsion spring 34 is housed and disposed between the center stopper 44 and the center ring 45, the ratchet mechanism 5 can be made sufficiently thin. As a result, the gap between the operation lever and the inner panel of the door can be increased, so that the operability of the operation lever can be improved and the degree of freedom in the layout of the mounting position of the operation lever with respect to the rotary drum 3 can be improved. Is improved.
[0063]
【The invention's effect】
As is apparent from the above description, according to the first aspect of the present invention, the operation of the ratchet mechanism and the clutch brake mechanism arranged in the superposed state enables the seat cushion to be efficiently raised and lowered. Of course, in particular, since the outer diameter of the rotary drum and the cam member is formed to be relatively large, and the torsion spring is disposed between the outer peripheral surface of the main body of the cam member and the inner peripheral surface of the rotary drum. In addition, the diameter of the ratchet mechanism can be increased according to the side panel, and the thickness can be reduced. As a result, the gap between the operation lever and the inner panel of the door can be increased, so that the operability of the operation lever can be improved and the degree of freedom in the layout of the mounting position of the operation lever with respect to the rotary drum can be improved. improves.
[0064]
According to the second aspect of the present invention, since the torsion spring is accommodated and disposed inside the center stopper and the ring member, the ratchet mechanism can be made sufficiently thin. As a result, the gap between the operation lever and the inner panel of the door can be increased, so that the operability of the operation lever can be improved and the degree of freedom in the layout of the mounting position of the operation lever with respect to the rotary drum can be improved. improves.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an apparatus according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the present apparatus.
FIG. 3 is a sectional view taken along line AA of FIG. 2;
FIG. 4 is a sectional view taken along line BB of FIG. 2;
FIG. 5A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 5B is a diagram illustrating the operation of the clutch brake mechanism;
FIG. 6A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 6B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 7A is a diagram illustrating the operation of the ratchet mechanism according to the present embodiment, and FIG. 7B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 8A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 8B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 9A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 9B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 10 is an exploded perspective view of the device according to the second embodiment of the present invention.
FIG. 11 is a longitudinal sectional view of the present apparatus.
FIG. 12 is a sectional view taken along line CC of FIG. 2;
FIG. 13A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 13B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 14A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 14B is a diagram illustrating the operation of the clutch brake mechanism;
FIG. 15A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 15B is a diagram illustrating the operation of the clutch brake mechanism;
FIG. 16A is a diagram illustrating the operation of the ratchet mechanism according to the present embodiment, and FIG. 16B is a diagram illustrating the operation of the clutch brake mechanism.
FIG. 17A is a diagram illustrating the operation of the ratchet mechanism according to the embodiment, and FIG. 17B is a diagram illustrating the operation of the clutch brake mechanism.
[Explanation of symbols]
1, 31 ... base member
2, 32 ... gear shaft
3, 33 ... rotating drum
4, 34 ... torsion spring (spring member)
5 Ratchet mechanism,
6… Clutch brake mechanism
8 ... Outer drum
9 ... Rotor cam
10. Wedge-shaped space
11a, 11b ... roller (rotary body)
12 ... Coil spring
13 Release member
14 ... Lever side stopper
15 ... Cam member
16 ... Cam surface
17 ... rotor
18 ... wedge-shaped space
19a, 19b ... roller
20 ... Coil spring
38 ... Outer drum
39 ... Rotor cam
40 ... wedge-shaped space
41a, 41b ... rollers
42 ... release member
44… Center stopper
45 ... Center ring
46: Roller stopper
47 ... rotor

Claims (2)

A gear shaft rotatably penetrating substantially the center of a base member fixed to the seat; a rotary drum rotatably provided on the base member and having an operation lever attached to an outer surface; A spring member for urging the rotation position to a neutral position via a drum, and the spring member is disposed between the base member and the rotation drum, and the rotation of the rotation drum in one direction causes the gear shaft to move in the same direction. A vehicle comprising: a ratchet mechanism for rotating; and a clutch brake mechanism disposed between the base member and the ratchet mechanism and linked to the gear shaft to regulate reversal of the gear shaft due to operation of the ratchet mechanism. A seat height adjustment device,
The ratchet mechanism has a stopper member fixed to the base member via an outer drum of a clutch brake mechanism, and a substantially circular shape which is locked to the rotating drum and rotates synchronously, and a maximum rotation position is regulated by the stopper member. An annular cam member, a cam surface formed on an inner peripheral surface of an annular hole formed substantially at the center of the cam member, and a rotatable member disposed in the annular hole, interlocked with the clutch brake mechanism. A rotating member, at least one pair of rotating members rotatable in a circumferential direction in a wedge-shaped space formed between an outer peripheral surface of the rotating member and the cam surface, and a rotating member disposed between the rotating members. A spring that urges both rotating bodies toward the end of the wedge-shaped space,
The spring member is disposed between the inner peripheral surface of the rotary drum and the outer peripheral surface of the cam member, and one end of the spring member is locked to the stopper member, and the other end is locked to the cam member. A height adjustment device for a vehicle seat, wherein the rotary drum is biased to a neutral position in the operation rotation direction. A gear shaft rotatably penetrating substantially the center of a base member fixed to the seat; a rotary drum rotatably provided on the base member and having an operation lever attached to an outer surface; A spring member for urging the rotation position to a neutral position via a drum, and the spring member is disposed between the base member and the rotation drum, and the rotation of the rotation drum in one direction causes the gear shaft to move in the same direction. A vehicle comprising: a ratchet mechanism for rotating; and a clutch brake mechanism disposed between the base member and the ratchet mechanism and linked to the gear shaft to regulate reversal of the gear shaft due to operation of the ratchet mechanism. A seat height adjustment device,
The ratchet mechanism is a cam surface formed on the inner peripheral surface of the rotating drum, a center stopper fixed to the outer drum of the clutch brake mechanism on the base member, and is rotatably overlapped with the center stopper. A ring member that is locked to the rotating drum and rotates synchronously; a rotating member that is rotatably disposed inside the rotating drum and that is interlocked with the clutch brake mechanism; an outer peripheral surface of the rotating member and the cam surface; At least a pair of rotating bodies rotatable in a circumferential direction in a wedge-shaped space formed between the two rotating bodies, and biasing both the rotating bodies toward an end of the wedge-shaped space. And a spring that is disposed on the end face side of the rotating member while being restricted by the center stopper, and comes into contact with the one rotating body with the rotating operation of the rotating drum. Via the ring is composed of a regulating member for pressing the other of the rotating body to the edge direction of the wedge-shaped space,
The spring member is disposed and housed inside the center stopper and the ring member, and one end of the spring member is locked to the center stopper, and the other end is locked to the ring member. A height adjusting device for a vehicle seat, wherein a rotating drum is biased to a neutral position in an operation rotation direction.

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