JP2019189128A - Lifter device - Google Patents

Abstract

To provide a lifter device adjusting the height of a seat by oscillation operation of an operation handle, and when the operation handle is fixed to a support member of a device, capable of reducing the number of inclusion components as possible, and shortening a path for transmitting force in a thrust direction on a rotary shaft of the operation handle to the support member, thereby suppressing tottering of the operation handle in the thrust direction of the rotary shaft in operation.SOLUTION: A lifter device comprises: an input member 41 which is rotated around a rotary shaft 22 as a center in synchronization with an operation handle (20) and inputs operation force of the operation handle (20) to an inner tooth 51 of a rotary drive mechanism 50 and a rotary transmission plate 36 (engagement hole 36a) of a lock mechanism 30; and a caulking pin 25 for fixing the input member 41 to the cover 24 in a slidable state.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a lifter device used for height adjustment of a seat of an automobile or the like.

  2. Description of the Related Art A lifter device used for a seat of an automobile or the like adjusts the height of a seat cushion with respect to a floor by operating an operation handle, and various types have been developed. In the invention of Patent Document 1, the height of the seat is adjusted by swinging the other end up and down with the one end of the operation handle as the center of rotation. When the operation handle is operated upward from the neutral position, each operation is performed. The height is increased according to the operation amount, and the operation handle is repeatedly operated until the height desired by the seated person is reached. On the other hand, when the operation handle is operated downward from the neutral position, the lock mechanism is released from the locked state and continuously lowered in height.

  In the case of the invention of Patent Document 1, the radial direction is supported by the rotating shaft at the rotation center of the operation handle, but the thrust direction is only in a layered arrangement, and is not actively supported. .

JP 2017-65484 A

  As a result, the operation handle is stably operated around the rotation axis in the rotation direction, whereas in the direction orthogonal to the rotation direction, the operation handle may fluctuate during the operation, and the operation is not stable. The reason for this is that, as described above, there may be gaps in the thrust direction at the rotation center of the operation handle due to dimensional errors in the components arranged in layers and variations during assembly. Becomes unstable in the thrust direction due to the effect of the gap. For this reason, when the operating handle is swung in the vertical direction, the operating end of the operating handle may wobble in the thrust direction of the rotating shaft, causing the operator to feel that the quality of the product is inferior.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a lifter device that adjusts the height of a seat by swinging the operation handle. By fixing the operation handle to a support member of the device, the number of intervening parts is reduced as much as possible. This is to shorten the path for transmitting the thrust direction force on the rotation shaft to the support member and to prevent the operation handle from wobbling in the thrust direction of the rotation shaft during operation.

  A lifter device according to a first aspect of the present invention includes a pinion gear that meshes with an input gear of a link mechanism that moves the seat up and down, and a rotation control device that controls the rotation of the pinion gear. The rotation control device is configured such that a rotating shaft that rotates in synchronization with the pinion gear, a support member that rotatably supports the rotating shaft, and an operation handle for moving the seat up and down raise or lower the seat. When operated, the rotary drive mechanism transmits the operating force of the operating handle to the rotating shaft and rotationally drives the rotating shaft in the ascending or descending direction, and the operating handle causes the seat to be raised or lowered. When operated, the lock mechanism that allows the rotation shaft to rotate and locks the rotation of the rotation shaft at the operation end position of the operation handle, and rotates in synchronization with the operation handle. An input member for inputting an operation force of the operation handle to the lock mechanism, and a fixing member for fixing the input member to the support member so as to be relatively rotatable. That.

  According to the first invention, since the input member that is rotated in synchronization with the operation handle is fixed to the support member, the input member is a short force transmission path to the support member in the axial direction and has a small number of intervening parts. Supported. Therefore, it is possible to suppress the operation handle from wobbling in the thrust direction of the rotating shaft during operation.

  According to a second aspect of the present invention, in the first aspect, the support member is configured as a container that accommodates the rotation shaft, the rotation drive mechanism, and the lock mechanism therein, and the input member is the container The operation force of the operation handle is inputted to the rotation drive mechanism and the lock mechanism through the container from the outside to the inside of the container.

  According to the second invention, the support member is configured as a container, and the input member is fixed to the outside of the container. Therefore, the support member and the input member can be disposed close to each other, and the input member can be easily fixed to the support member.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the fixing member is supported on an axis of the rotating shaft, and the input member is fixed to be rotatable about the fixing member. ing.

  According to the third invention, by causing the fixing member to function as a part of the rotation shaft, the fixing member can be disposed close to the support member, and the input member can be easily fixed to the support member. Can do.

It is a side view of the sheet | seat to which the lifter apparatus which is 1st Embodiment of this invention is applied. It is a side view from the sheet | seat inner side of 1st Embodiment. It is a disassembled perspective view of the principal part of 1st Embodiment. It is the perspective view which looked at the rotation control device of a 1st embodiment from the sheet outside. It is the perspective view which looked at the rotation control device of a 1st embodiment from the sheet inside. It is a front view of the rotation control device of the first embodiment. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. FIG. 7 is a cross-sectional view taken along line VIII-VIII in FIG. 6. It is the disassembled perspective view which looked at the rotation control apparatus from the seat outer side. It is a disassembled perspective view which shows the assembly | attachment state between the one part components shown in FIG. It is a disassembled perspective view which shows the further assembly | attachment state between the one part components shown in FIG. It is a disassembled perspective view which shows the further assembly | attachment state between the one part components shown in FIG. It is the disassembled perspective view which looked at the rotation control apparatus from the sheet | seat inner side. It is a disassembled perspective view which shows the assembly | attachment state between some component parts shown in FIG. It is a disassembled perspective view which shows the further assembly | attachment state between the one part components shown in FIG. It is a state diagram of the feed function of the rotation control device when the operation handle is in the neutral position. It is a state diagram of the lock function. It is a state figure of a feed function when an operation handle is pushed down from a neutral position to a middle position. It is a state diagram of the lock function. It is a state figure of a feed function when an operation handle is pushed down from a neutral position to a full stroke position. It is a state diagram of the lock function. FIG. 6 is a state diagram of a feed function when the pinion gear is rotated forward by a gravitational action that is received from the seat side from a state in which the operation handle is pushed down. It is a state diagram of the lock function. It is a state diagram of the feed function when the operation handle is returned from the push-down operation state to the neutral position. It is a state diagram of the lock function. It is a state figure of a feed function when an operation handle is pulled up from a neutral position to a middle position. It is a state diagram of the lock function. FIG. 6 is a state diagram in which the rotation of the pinion gear in the push-down operation direction is stopped by a stopper. FIG. 6 is a state diagram in which the rotation of the pinion gear in the pulling operation direction is stopped by a stopper. It is a front view which shows the lifter apparatus which is 2nd Embodiment of this invention. FIG. 31 is a cross-sectional view taken along the line XXXI-XXXI in FIG. 30. It is a front view which shows the lifter apparatus which is 3rd Embodiment of this invention. It is sectional drawing similar to FIG. 31 which shows the lifter apparatus which is 4th Embodiment of this invention. It is sectional drawing similar to FIG. 31 which shows the lifter apparatus which is 5th Embodiment of this invention.

<Overall configuration of the first embodiment>
1 to 3 show an automobile seat (hereinafter simply referred to as a seat) 1 to which a lifter device according to a first embodiment of the present invention is applied. In each figure, the direction of each part in the state which mounted | wore the motor vehicle 1 with the arrow is shown. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIG. 1, the seat 1 is provided with a seat back 3 that forms a backrest at the rear portion of the seat cushion 2 that forms a seat, and the seat back 3 is rotatable in the front-rear direction with respect to the seat cushion 2. Yes. The seat cushion 2 includes a lifter device 10 and a seat slide device 8 at a lower portion, and is fixed to a vehicle floor 4 via a bracket 7.

  As shown in FIG. 2, the seat slide device 8 is a known device, and a pair of left and right upper rails 6 are coupled to a pair of left and right lower rails 5 extending in the front-rear direction so as to be slidable in the front-rear direction. The left and right lower rails 5 are fixedly supported by a pair of front and rear brackets 7 fixed to the floor 4. A lifter device 10 is provided on the left and right upper rails 6.

  As shown in FIGS. 2 and 3, the lifter device 10 includes a base member 14 fixed on each upper rail 6, and a plurality of link members 11 rotatably coupled to the front and rear end portions of each upper rail 6. A side frame 13 that is a skeleton member of the cushion 2, a base member 14, and each link member 11 constitute a link mechanism 12 that is a four-bar link. Of the plurality of link members 11, the rear link 11 b on the right rear side includes a sector gear (corresponding to the input gear of the present invention) 16 and is rotated in the front-rear direction by the pinion gear 18 of the rotation control device 21. It is configured as follows. The rotation axis of the right rear rear link 11b with respect to the side frame 13 is constituted by a torque rod 17, and the left rear rear link (not shown) is also synchronized with the rear link 11b via the torque rod 17. It is configured to rotate.

  The side frame 13 is provided with a through hole 13a for inserting the pinion gear 18, and the rotation control device 21 is fixed to the right side wall of the side frame 13 so that the pinion gear 18 is inserted into the through hole 13a. ing. The rotation control device 21 can be rotated in the forward and reverse directions by an operation handle 20 that extends in the front-rear direction on the right side portion of the seat cushion 2. The operation handle 20 is configured to swing the front end portion up and down around the rear end portion. When the operation handle 20 is operated upward from the neutral position, the rotation control device 21 rotates so that the rear link 11b rises from the base member 14, and when the operation handle 20 is operated downward from the neutral position, the rotation control device 21 is The rear link 11b is rotated so as to be lowered on the base member 14. With the configuration of the four-joint link described above, the front link 11a also rotates according to the rotation of the rear link 11b, and the height of the seat cushion 2 from the floor 4 is adjusted according to the operation of the operation handle 20.

<Configuration of rotation control device 21 (lock mechanism 30)>
4 to 6 show the rotation control device 21 removed from the seat cushion 2. Hereinafter, the configuration of the rotation control device 21 will be described with reference to FIGS.

  The rotation control device 21 is assembled such that the rotation shaft 22 passes through the center hole 23c of the support member 23 that is a base member, and the pinion gear 18 protrudes from the left side surface of the support member 23. The support member 23 is fixed to the side frame 13 with the pinion gear 18 passing through the through hole 13a (see FIGS. 2 and 3) of the side frame 13.

  The right side surface of the support member 23 is stamped and formed on the left side so as to accommodate the lock plate 31 of the lock mechanism 30 to form a guide recess 23b, and has a circular container shape as a whole. Inner teeth 34 that mesh with poles 32 and 33 described later are formed on the inner peripheral surface of the guide recess 23b. A spline hole 31 b is formed at the center of the lock plate 31 so as to mesh with the spline 22 b of the rotary shaft 22. Therefore, the lock plate 31 is rotated synchronously with the rotary shaft 22.

  On the outer peripheral portion of the right side surface of the lock plate 31, one protrusion 31 d is protruded and distributed in the vertical direction, and two protrusions 31 e are protruded and distributed in the front and rear. The protrusions 31e are fitted in the through holes 32a and 33a of the poles 32 and 33 so that the poles 32 and 33 can swing around the protrusions 31e. Further, each projection 31d is fitted with a winding portion 35a of a torsion spring 35, and each end portion 35b of the torsion spring 35 is engaged with each of the poles 32 and 33, and locks each of the poles 32 and 33. The plate 31 is biased toward the outer peripheral side. Therefore, the engaging end portions 32 c and 33 c of the respective poles 32 and 33 are always engaged with the internal teeth 34 of the support member 23.

  FIG. 11 shows a state in which the lock mechanism 30 is assembled to the support member 23 as described above.

<Configuration of Rotation Control Device 21 (Rotation Drive Mechanism 50)>
A plate-like input member 41 that is coupled to the operation handle 20 and is rotated is provided on the right side surface of the cover (which constitutes a support member of the present invention) 24 that is formed in a container shape that swells to the right as a whole. ing. In the center hole 41 b of the input member 41, a caulking end portion 25 b of a caulking pin (corresponding to a fixing member of the present invention) 25 is inserted and fixed through the through hole 24 e of the cover 24, and the caulking pin 25 inputs the cover 24. The member 41 is fixed so as to be rotatable relative to each other. An engagement piece 42 is formed at the upper part of the input member 41 by bending it to the left side, and the engagement piece 42 is aligned with the inner peripheral side of the engagement piece 24 b formed to protrude to the right side of the cover 24. Has been placed. An end 43a of the torsion spring 43 is disposed so as to wrap around the engaging pieces 42 and 24b. Therefore, when the input member 41 is rotated by the operation handle 20, the engagement piece 42 moves away from the engagement piece 24b in the circumferential direction, but when the rotation operation is released, the torsion spring 43 Due to the urging force, the engagement piece 42 and the engagement piece 24b are positioned to overlap each other in the circumferential direction, and the input member 41 is returned to the position before the rotation operation.

  A connecting member 53 and a cam member 54 are provided on the left side of the cover 24 so as to be accommodated in the container-like cover 24. The cover 24 is fixed to the support member 23 by sandwiching these components together with the lock plate 31 and the rotation transmission plate 36. At this time, the leg portion 24d of the cover 24 is fixed to the through hole 23a of the support member 23 with a rivet (not shown). In this way, a container is constituted by the support member 23 and the cover 24, and in this container, as the functional parts of the rotation control device 21, the rotation shaft 22, the lock plate 31, the rotation transmission plate 36, the connecting member 53, the cam The member 54 etc. are accommodated.

  The cam member 54 is generally formed in a ring shape, is provided with four pins 54b on the right side surface, and is formed with a cam projection 54a protruding above the inner periphery of the ring shape. Each pin 54 b of the cam member 54 is fixed to the inside of the cover 24 by fitting into the through hole of the protruding piece 24 c of the cover 24.

  The connecting member 53 includes arms 53 a extending to the right at the front and rear portions, and each arm 53 a passes through the opening 24 a of the cover 24 and penetrates the through hole 41 a of the input member 41. Therefore, the connecting member 53 can be rotated together with the input member 41. On the left side surface of the connecting member 53, a pair of feed claws 52 are swingably coupled by fitting the hinge portions 52 b of the feed claws 52 into the through holes 53 b of the connection member 53.

<Configuration of rotation control device 21 (rotation transmission plate 36)>
A rotation transmission plate 36 is provided on the left side of the connection member 53, and the rotation transmission plate 36 is sandwiched between the connection member 53 and the lock plate 31. On the surface of the rotation transmission plate 36, four substantially square engaging holes 36a are formed corresponding to the poles 32 and 33, respectively. The pins 32b and 33b of the poles 32 and 33 are inserted into the engagement holes 36a so as to be engageable with each other. On the surface of the rotation transmission plate 36, two elliptical engagement holes 36b are formed corresponding to the protrusions 31d. Each protrusion 31d is inserted into each engagement hole 36b so as to be engageable.

  Furthermore, on the right side surface of the rotation transmission plate 36, torsion springs 37 and 55 are provided around the center hole 36d. The end portion 37 a of the torsion spring 37 is bent to the left and is inserted into the long hole 36 c of the rotation transmission plate 36 and the long hole 31 c of the lock plate 31 so as to be engageable. The torsion spring 37 maintains the rotation angle of the rotation transmission plate 36 with respect to the lock plate 31 in the neutral position by the biasing force. On the other hand, the end 55a of the torsion spring 55 urges the protrusion 52d of the feed claw 52 to press each feed claw 52 to the outer peripheral side. In addition, a projection 55 b that protrudes toward the right side is formed at the center of the torsion spring 55. The protrusion 55 b is engaged by being inserted into an engagement hole 53 c formed at the lower center portion of the connecting member 53. Therefore, the protrusion 52 d of the feed claw 52 is constantly pressed by the end 55 a of the torsion spring 55, and the engagement end 52 a is engaged with the internal teeth 51 of the rotation transmission plate 36.

<Configuration of rotation control device 21 (fixing of input member 41)>
As described above, the input member 41 and the rotation drive mechanism 50 (the connecting member 53, the cam member 54, the feed claw 52, the internal teeth 51 of the rotation transmission plate 36, the torsion spring 55) are assembled to the cover 24 as shown in FIG. , 15. FIG. 12 shows a state where the rotation transmission plate 36 is assembled on the lock plate 31. 11 and 12 do not show the assembly procedure of the rotation control device 21, but the spline 22c of the rotary shaft 22 is finally fitted into the spline hole 25a of the caulking pin 25, and the cover 24 is further supported by the support member 23. As a result, the rotation control device 21 is assembled.

  In this assembled state, the hinge pin (corresponding to the fixing member of the present invention) 25 is supported on the axis of the rotating shaft 22, and the input member 41 is rotatably fixed around the hinge pin 25. Yes. The input member 41 is disposed outside the container by the support member 23, and is fixed to the cover 24 constituting the container by the hinge pin 25. Therefore, the support member 23 and the input member 41 can be disposed close to each other, and the input member 41 can be easily fixed to the support member 23.

<Configuration of rotation control device 21 (stopper 60)>
An outer peripheral surface 22a is formed between the pinion gear 18 of the rotary shaft 22 and the spline 22b, and a rotary shaft-side protrusion 63 is formed to project in the radial direction at a specific angular position of the outer peripheral surface 22a. . In a state where the rotation shaft 22 is inserted into the center hole 23 c of the support member 23, the rotation shaft side protrusion 63 is positioned so as to be exposed on the right side surface of the guide recess 23 b of the support member 23.

  On the right side surface of the guide recess 23 b of the support member 23, an arcuate support member side protrusion 61 is formed by stamping. On the other hand, around the spline hole 31b of the lock plate 31, the lock plate 31 is formed so as to form a sliding surface portion 31a concentric with the spline hole 31b. When the lock plate 31 is rotated with respect to the support member 23, the outer periphery of the support member side protrusion 61 slides on the inner periphery of the sliding surface portion 31a. Further, the engaging piece 62 is arranged so as to slide in the gap between the inner periphery of the sliding surface portion 31 a and the outer peripheral surface 22 a of the rotating shaft 22.

  Therefore, when the rotation shaft 22 is rotated in the downward direction by the operation of the rotation control device 21 and reaches the lower limit position, the rotation shaft side protrusion 63 sandwiches the engagement piece 62 and the support member side protrusion as shown in FIG. Abutting on the end of 61, the rotation of the rotary shaft 22 is stopped. When the rotary shaft 22 is rotated in the upward direction and reaches the upper limit position as shown in FIG. 29, the rotary shaft side protrusion 63 is located at the opposite end of the support member side protrusion 61 with the engagement piece 62 interposed therebetween. A further portion of the rotary shaft 22 is stopped.

<Operation of the rotation control device 21 (the operation handle 20 is not operated)>
Hereinafter, the height adjusting action of the seat cushion 2 by the rotation control device 21 will be described with reference to FIGS.

  16 and 17 show a neutral position state in which the operation handle 20 is not operated and the input member 41 and the connecting member 53 are not rotated. At this time, as shown in FIG. 16, the feed claw 52 is in a state where the engagement end portion 52 a is engaged with the internal teeth 51 of the rotation transmission plate 36 by the urging of the torsion spring 55. In addition, as shown in FIG. 17, the pawls 32 and 33 of the lock mechanism 30 are brought into a state in which the engaging end portions 32 c and 33 c are engaged with the internal teeth 34 of the support member 23 by the urging of the torsion springs 35. ing. Therefore, the lock mechanism 30 is locked, the lock plate 31 is not rotated, and the height of the seat 1 is not changed to the ascending side or the descending side.

<Operation of the rotation control device 21 (the operation handle 20 is pushed down)>
18 and 19 show a state in which the operation handle 20 is pushed down from the neutral position to the middle position. At this time, as shown in FIG. 18, the connection member 53 is rotated in the arrow direction by the rotation of the input member 41. As a result, each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a of the front feeding claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and rotates the rotation transmission plate 36 in the direction of the arrow. At this time, the engagement end portion 52 a of the rear feed claw 52 is not engaged with the internal teeth 51 of the rotation transmission plate 36. In other words, in this state, the teeth of the engagement end 52a are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 51. In addition, as the rotation transmission plate 36 rotates, the pin 52 c of the rear feed claw 52 rides on the cam protrusion 54 a of the cam member 54, and the engagement end 52 a is separated from the internal teeth 51.

  When the rotation transmission plate 36 is rotated in this way, the engagement hole 36a of the rotation transmission plate 36 engages with the pin 33b of each pole 33 and the engagement end portion 33c of each pole 33 as shown in FIG. Is in a state separated from the internal teeth 34 of the support member 23. That is, the lock state of the lock plate 31 in the descending direction is released. Thereafter, when the protrusion 31d of the lock plate 31 is engaged with the engagement hole 36b, the rotation of the rotation transmission plate 36 can be transmitted to the lock plate 31.

<Operation of the rotation control device 21 (full stroke operation of the operation handle 20)>
20 and 21 show a state where the operation handle 20 is pushed down from the neutral position to the full stroke position. The full stroke position is determined by the arm 53a of the connecting member 53 coming into contact with the circumferential end of the opening 24a of the cover 24 (see FIGS. 8, 10, and 11). At this time, as shown in FIG. 20, the rotation of the connecting member 53 and each feed claw 52 proceeds as compared with the state of FIG. 18, and the rotation angle of the rotation transmission plate 36 is increased by the front feed claw 52.

  When the rotation angle of the rotation transmission plate 36 is increased in this manner, the rotation of the rotation transmission plate 36 is transmitted to the lock plate 31 and the lock plate 31 is rotated, as shown in FIG. The rotating shaft 22 is rotated. As a result, the pinion gear 18 is rotated and the seat cushion 2 is lowered. At this time, the engagement end portion 32 c of each pole 32 is configured not to mesh with the internal teeth 34 of the support member 23. That is, in this state, the teeth of the engagement end portion 32c are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 34. Therefore, when the lock plate 31 rotates, the engagement end portion 32 c of each pole 32 is slid on the inner teeth 34 of the support member 23. The movement of each pole 32 at this time is indicated by a solid line and a virtual line. It is also indicated by a wavy arrow.

<Operation of the rotation control device 21 (effect of gravity of the seat 1)>
22 and 23 show a state in which the rotation of the pinion gear 18 in the seat lowering direction due to the gravity applied to the seat cushion 2 exceeds the rotation of the pinion gear 18 in the seat lowering direction as described above due to the pressing operation of the operation handle 20. Indicates. That is, it shows a state in which the operation force of pushing down the operation handle 20 is weakened. At this time, since the rotation transmission plate 36 continues to rotate by the feed claws 52, the state of each feed claw 52 is the same as the state of FIG. 20 as shown in FIG. On the other hand, the lock plate 31 is not rotated by the rotation transmission plate 36 but is rotated by the rotation shaft 22. Therefore, as shown in FIG. 23, the swing state of each pole 33 by the engagement hole 36a is released, and each pole 33 is in a locked state in which the lock plate 31 is rotated in the downward direction. Therefore, it is possible to prevent the seat cushion 2 from being lowered due to gravity applied to the operation handle 20 during the push-down operation. In this state, in order to prevent the seat cushion 2 from descending due to gravity due to a delay in the operation of each pole 33 locking the rotation of the lock plate 31 in the descending direction, a certain amount of braking is applied to the rotation of the rotating shaft 22. It is desirable to suppress the rotation shaft 22 from being rotated by the gravity of the sheet 1 by using the above.

<Operation of the rotation control device 21 (when the operation handle 20 is depressed)>
24 and 25 show a state where the operation handle 20 has been depressed and returned to the neutral position. At this time, the input member 41 is returned to the neutral position by the urging force of the torsion spring 43, and the connecting member 53 is also returned to the neutral position in synchronization. Therefore, the connecting member 53 is rotated as indicated by an arrow in FIG. Until the connecting member 53 is returned to the neutral position, the rear feed claw 52 is in a state in which the pin 52c rides on the cam projection 54a of the cam member 54. When the connecting member 53 returns to the neutral position, as shown in FIG. 24, the rear feed claw 52 returns to the state where the engagement end portion 52 a is engaged with the internal teeth 51 of the rotation transmission plate 36. On the other hand, in the front feed claw 52, the engaging end 52a slides on the inner teeth 51 of the rotation transmission plate 36 until the connecting member 53 is returned to the neutral position.

  When the push-down operation of the operation handle 20 is stopped, as described above, the rotational drive by the feed claw 52 to the rotation transmission plate 36 is released, so that the rotation transmission plate 36 is applied to the lock plate 31 by the urging force of the torsion spring 37. On the other hand, it is returned to the initial position. Therefore, as shown in FIG. 25, each of the poles 32 and 33 is in a state where the engagement end portions 32c and 33c are engaged with the internal teeth 34 of the support member 23, and the lock plate 31 is locked at that position. Become. Accordingly, the pinion gear 18 also stops rotating, and the height of the seat cushion 2 is maintained at the position operated so far.

<Operation of the rotation control device 21 (pull-up operation of the operation handle 20)>
26 and 27 show a state where the operation handle 20 is pulled up from the neutral position to the middle position. At this time, as shown in FIG. 26, the connecting member 53 is rotated in the direction of the arrow by the rotation of the input member 41. As a result, each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a of the rear feed claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and rotates the rotation transmission plate 36 in the same direction. At this time, the engaging end 52a of the front feed claw 52 is not engaged with the internal teeth 51 of the rotation transmission plate 36. In other words, in this state, the teeth of the engagement end 52a are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 51. In addition, as the rotation transmission plate 36 rotates, the pin 52 c of the front feeding claw 52 rides on the cam protrusion 54 a of the cam member 54, and the engagement end 52 a is separated from the internal teeth 51.

  When the rotation transmission plate 36 is rotated in this way, the engagement hole 36a of the rotation transmission plate 36 engages with the pin 32b of each pole 32 and the engagement end portion 32c of each pole 32 as shown in FIG. Is in a state separated from the internal teeth 34 of the support member 23. That is, the lock state of the lock plate 31 in the upward direction is released. Thereafter, when the protrusion 31 d of the lock plate 31 is engaged with the engagement hole 36 b, the rotation of the rotation transmission plate 36 is transmitted to the lock plate 31. Therefore, as shown by the arrow in FIG. 27, the lock plate 31 rotates to rotate the rotating shaft 22. As a result, the pinion gear 18 is rotated and the seat 1 is raised. At this time, the engagement end portion 33 c of each pole 33 is not engaged with the internal teeth 34 of the support member 23. That is, in this state, the teeth of the engagement end portion 33c are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 34. Therefore, when the lock plate 31 rotates, the engagement end portion 33 c of each pole 33 is slid on the inner teeth 34 of the support member 23.

<Operation of rotation control device 21 (summary)>
As described above, when the operation handle 20 is pushed down, the seat 1 is lowered by an amount corresponding to the operation. The sheet 1 can be adjusted to a desired height by repeating the pressing operation. On the contrary, when the operation handle 20 is pulled up, similarly, the seat 1 is raised by an amount corresponding to the operation. The sheet 1 can be adjusted to a desired height by repeating the pulling operation.

  When the sheet 1 reaches the lower limit position or the upper limit position by the above operation, the rotation of the rotation shaft 22 is stopped as shown in FIG.

<Effect of the first embodiment>
According to the first embodiment, the input member 41 rotated in synchronization with the operation handle 20 is fixed to the cover 24 fixed integrally with the support member 23 by the hinge pin 25. Therefore, the input member 41 is supported by the support member 23 in the axial direction with a short force transmission path only via the cover 24 and with a small number of intervening parts. Therefore, it is possible to prevent the operation handle 20 from wobbling in the thrust direction of the rotating shaft during operation.

<Configuration of Second Embodiment>
30 and 31 show a second embodiment of the present invention. The feature of the second embodiment over the first embodiment is that the input member 41 is fixed to the cover 24 not on the rotation center of the input member 41 but on the outer peripheral side thereof. The other configurations are the same, and the repetitive description of the same parts is omitted.

  In the second embodiment, the rotation shaft 22 passes through the input member 41 and the cover 24, and the input member 41 is rotatable about the rotation shaft 22. Further, the outer peripheral side of the rotation center of the input member 41 is fixed to the cover 24 by a caulking pin 26. Here, the cover 24 is formed with an arcuate guide hole 24f centered on the rotation shaft 22 corresponding to the caulking pin 26 so that the input member 41 can rotate about the rotation shaft 22. Further, the fixing position by the caulking pin 26 is set to the front side from the rotation center of the input member 41. The caulking pin 26 corresponds to the fixing member of the present invention.

  The fixing of the input member 41 and the cover 24 with the caulking pin 26 is performed for the purpose of suppressing the input member 41 from wobbling in the thrust direction when the operation handle 20 is operated. It is necessary to consider so that the sliding resistance is not increased and the rotation operation of the input member 41 is not adversely affected. Therefore, the input member 41 is strongly crimped by the caulking pin 26, but the cover 24 sandwiched between the step portion of the caulking pin 26 and the input member 41 is crimped with a slight gap.

  In the second embodiment, the fixing of the input member 41 and the cover 24 by the caulking pin 26 is performed at only one place on the outer peripheral side from the rotation center of the input member 41, but the fixing is performed at two places. It can also be. In that case, it is desirable for balance that the two positions should be opposed to each other across the center of rotation. When the fixing is performed at two places as described above, wobbling during operation of the operation handle 20 can be further suppressed.

<Effect of the second embodiment>
Also in the second embodiment, as in the first embodiment, the input member 41 is fixed to the cover 24 by the caulking pin 26, and the input member 41 passes through the cover 24 in the thrust direction of the rotating shaft 22. It is supported by the support member 23. Therefore, it is possible to prevent the operation handle 20 from wobbling in the thrust direction of the rotating shaft 22 during operation.

  The wobbling of the operation handle 20 occurs when the front end of the operation handle 20 fixed to the input member 41 by the connecting portion 41c swings in the left-right direction. In the second embodiment, the input member 41 and the cover 24 are fixed by the caulking pin 26 on the outer peripheral side in front of the rotation center of the input member 41, and the fixing is away from the rotation center of the input member 41. Since the operation handle 20 is aligned with the direction in which the operation handle 20 extends, the shaking of the operation handle 20 can be effectively suppressed and the wobbling of the operation handle 20 can be effectively suppressed.

<Configuration of Third Embodiment>
FIG. 32 shows a third embodiment of the present invention. A feature of the third embodiment over the second embodiment (see FIGS. 30 and 31) is that the input member 41 is fixed to the cover 24 and a part of the cover 24 is deformed without using the caulking pin 26. This was done by caulking. The other configurations are the same, and the repetitive description of the same parts is omitted.

  In the third embodiment, a portion of the cover 24 that faces the engagement piece 24b across the rotation center is cut and raised to form a plane that is slightly separated from the right surface of the cover 24 and parallel to the right surface of the cover 24. A bracket 24g is formed. The gap between the bracket 24g and the right surface of the cover 24 is such that the input member 41 is slidably sandwiched between the gaps. The bracket 24g wraps a part of the input member 41 (a portion facing the engaging piece 42 across the rotation center of the input member 41) between the cover 24 and the input member 41 is not separated from the surface of the cover 24. I am doing so. Here, the clearance between the bracket 24g and the right surface of the cover 24 is such that the input member 41 can rotate relative to the cover 24 and the operation handle 20 is prevented from wobbling in the thrust direction of the rotary shaft 22 during operation. Has been. The bracket 24g corresponds to the fixing member of the present invention.

<Effect of the third embodiment>
Also in the third embodiment, as in the first embodiment, the input member 41 is fixed to the cover 24 by a bracket 24g, and the input member 41 is interposed through the cover 24 in the thrust direction of the rotary shaft 22. It is supported by the support member 23. Therefore, it is possible to prevent the operation handle 20 from wobbling in the thrust direction of the rotating shaft 22 during operation.

<Configuration of the fourth embodiment>
FIG. 33 shows a fourth embodiment of the present invention. The feature of the fourth embodiment over the first embodiment is that the input member 41 is fixed to the cover 24 with a stepped bolt 27 and a nut 28 instead of the caulking pin 25. The other configurations are the same, and the repetitive description of the same parts is omitted.

  In the fourth embodiment, the input member 41 is fixed to the cover 24 by fastening the nut 28 with the input member 41 and the cover 24 sandwiched between the stepped bolts 27. And the fitting hole 27a formed in the left end of the stepped volt | bolt 27 is fitted to the right end of the rotating shaft 22, and both are integrated. Here, the input member 41 is firmly fixed by the stepped bolt 27 and the nut 28, and the cover 24 does not directly receive the fastening force between the stepped bolt 27 and the nut 28, and the stepped portion of the stepped bolt 27 and the cover 24. Between the two. Therefore, the input member 41 is fixed to the cover 24 in a state where the input member 41 can rotate relative to the cover 24, and the operation handle 20 is prevented from wobbling in the thrust direction of the rotary shaft 22 during operation. The stepped bolt 27 and the nut 28 correspond to the fixing member of the present invention.

<Effect of the fourth embodiment>
Also in the fourth embodiment, as in the first embodiment, the input member 41 is fixed to the cover 24 by the stepped bolts 27 and the nuts 28, and the input member 41 is in the thrust direction of the rotating shaft 22. It is supported by the support member 23 via the cover 24. Therefore, it is possible to prevent the operation handle 20 from wobbling in the thrust direction of the rotating shaft 22 during operation.

<Configuration of Fifth Embodiment>
FIG. 34 shows a fifth embodiment of the present invention. A feature of the fifth embodiment over the first embodiment is that a collar 29B is used for a step portion of a caulking pin 29A for fixing the input member 41 to the cover 24. The other configurations are the same, and the repetitive description of the same parts is omitted.

In the fifth embodiment, the cover 24 is swaged with the caulking pin 29A firmly through the collar 29B, and the collar 29B has a step of the caulking pin 29A so that the caulking force with the caulking pin 29A does not act on the input member 41 strongly. A collar 29 </ b> B is sandwiched between the cover and the cover 24. Accordingly, the input member 41 is loosely held in the gap between the step portion of the crimping pin 29A and the cover 24 determined by the height (lateral dimension) of the collar 29B. The caulking pin 29A and the collar 29B correspond to the fixing member of the present invention.
<Effect of the fifth embodiment>
Also in the fifth embodiment, as in the first embodiment, the input member 41 is fixed to the cover 24 by the caulking pin 29A and the collar 29B, and the input member 41 is covered with the cover 24 in the thrust direction of the rotating shaft 22. It is supported by the support member 23 via. Therefore, it is possible to prevent the operation handle 20 from wobbling in the thrust direction of the rotating shaft 22 during operation.

<Other embodiments>
As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible. For example, in the above embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like, or a seat installed in a movie theater or the like.

1 Car seat (seat)
2 Seat cushion 3 Seat back 4 Floor 5 Lower rail 6 Upper rail 7 Bracket 8 Seat slide device 10 Lifter device 11 Link member 11a Front link 11b Rear link 12 Link mechanism 13 Side frame 13a Through hole 14 Base member 16 Sector gear (input gear)
17 Torque rod 18 Pinion gear 20 Operation handle 21 Rotation control device 22 Rotating shaft 22a Outer peripheral surface 22b, 22c Spline 23 Support member 23a Through hole 23b Guide recess 23c Center hole 24 Cover (support member)
24a Opening 24b Engagement piece 24c Projection piece 24d Leg 24e Through hole 24f Guide hole 24g Bracket (fixing member)
25, 26 Caulking pin (fixing member)
25a Spline hole 25b Crimp end 27 Stepped bolt (fixing member)
27a Fitting hole 28 Nut (fixing member)
29A Caulking pin (fixing member)
29B Color (fixing member)
30 Lock mechanism 31 Lock plate 31a Sliding surface portion 31b Spline hole 31c Long holes 31d, 31e Protrusion 32, 33 Pole 32a, 33a Through hole 32b, 33b Pin 32c, 33c Engagement end 34 Internal tooth 35 Torsion spring 35a Winding portion 35b end 36 rotation transmission plate 36a engagement hole 36b engagement hole 36c long hole 36d center hole 37 torsion spring 37a end 41 input member 41a through hole 41b center hole 41c coupling part 42 engagement piece 43 torsion spring 43a end 50 Rotation drive mechanism 51 Internal tooth 52 Feed claw 52a Engagement end 52b Hinge part 52c Pin 52d Projection 53 Connection member 53a Arm 53b Through hole 53c Engagement hole 54 Cam member 54a Cam projection 54b Pin 55 Torsion spring 55a End 55b Projection 60 stopper 61 Support member side protrusion 62 Engagement piece 63 Rotating shaft side protrusion

Claims (3)

A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down;
A rotation control device for controlling the rotation of the pinion gear,
The rotation control device includes:
A rotating shaft that rotates in synchronization with the pinion gear;
A support member that rotatably supports the rotating shaft;
When an operating handle for raising and lowering the seat is operated to raise or lower the seat, the operating force of the operating handle is transmitted to the rotating shaft to rotate the rotating shaft in the up or down direction. A rotational drive mechanism for driving;
A lock mechanism that allows rotation of the rotating shaft when the operating handle is operated to raise or lower the seat, and locks rotation of the rotating shaft at an operation end position of the operating handle;
An input member that is rotated in synchronization with the operation handle and inputs an operation force of the operation handle to the rotation drive mechanism and the lock mechanism;
A lifter device comprising: a fixing member that fixes the input member to be relatively rotatable with respect to the support member. In claim 1,
The support member is configured as a container that accommodates the rotation shaft, the rotation drive mechanism, and the lock mechanism therein,
The input member is fixed to the outside of the container, and is configured to pass through the container from the outside to the inside of the container and input an operation force of the operation handle to the rotation drive mechanism and the lock mechanism. Lifter device. In claim 1 or 2,
The said fixing member is supported on the axis line of the said rotating shaft, The said input member is a lifter apparatus fixed so that rotation is possible centering | focusing on the said fixing member.

Images