WO2019208743A1

WO2019208743A1 - Lifter device

Info

Publication number: WO2019208743A1
Application number: PCT/JP2019/017818
Authority: WO
Inventors: 佑介梶野; 康明鈴木
Original assignee: トヨタ紡織株式会社
Priority date: 2018-04-27
Filing date: 2019-04-25
Publication date: 2019-10-31
Also published as: JP2019189130A

Abstract

A lifter device (10) configured so as to join an arm (53a) to an outer plate (41), in a state in which a cover (24) joined to a support member (23) is sandwiched between the outer plate (41) and an inner plate (53), said arm extending from the inner plate (53) so as to penetrate an opening (24a) in the cover (24) and a through-hole (41a) in the outer plate (41).

Description

Lifter device

The present invention relates to a lifter device. More specifically, a pinion gear that meshes with an input gear of a link mechanism that moves the seat up and down, and a rotation that controls the rotation of the pinion gear by being connected to an operation handle and a pinion gear that are operated in a corresponding rotation direction when the seat is moved up and down. And a control device.

Conventionally, a configuration in which a lifter device capable of adjusting a seat cushion height of a seat cushion is known in a vehicle seat (Patent Document 1). Specifically, the lifter device transmits the operation movement amount as the feed rotation movement amount of the gear by raising or lowering the operation handle so that the seat surface height is raised or lowered by a certain amount. It has become. Then, the lifter device unlocks the operation of the operation handle so that the rotation of the gear is locked at that position, and the operation handle is returned to the neutral position before the operation, and can be operated again. It will be returned to the state.

The operation handle described above is coupled to an input member pivotally supported by a pinion gear serving as an output shaft, and is configured to transmit the amount of movement of the rotation operation from the input member to the pinion gear via a gear transmission structure. Yes.

Japanese Laid-Open Patent Publication No. 2017-0665484

In the above prior art, a structure for suppressing misalignment in the thrust direction (that is, axial direction) between the input member coupled to the operation handle and the base that rotatably supports the pinion gear (so-called backlashing). However, it has a complicated structure with many component configurations.
One of the objects of the present invention is to suppress a displacement (backlash) in the thrust direction of an operation handle that is operated when the seat is moved up and down by a rational configuration.

[1] In the first aspect of the present invention, the lifter device comprises:
A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down;
A rotation control device that is arranged so as to connect between an operation handle that is operated in a corresponding rotation direction when the seat is moved up and down and the pinion gear, and that controls the rotation of the pinion gear;
A lifter device comprising a base that rotatably supports a part of the pinion gear,
The rotation control device is
An input member coupled to the operation handle and rotated about a rotation axis of the pinion gear by a rotation operation of the operation handle;
A cover coupled to the base and covering a region inside the rotation control device and rotatably supporting the other part of the pinion gear directly or indirectly via another member;
The input member is
An inner piece arranged in the region covered by the cover and transmitting the rotation of the operation handle to the pinion gear as a rotation, and an outer piece arranged outside the region across the cover,
The inner piece is
An arm penetrating in a thrust direction through a first through hole provided in the cover and a second through hole provided in the outer piece;
In a state where the arm is passed through the first through hole and the second through hole, the cover is placed directly in the thrust direction between the inner piece and the outer piece or indirectly through the separate member. And a coupling portion that couples the arm and the outer piece at a clamping position where the clamping is performed.

According to the first aspect, the outer piece and the inner piece (strictly speaking, in a state where the cover is sandwiched directly or indirectly through another member between the outer piece and the inner piece constituting the input member, The inner piece arm). Thereby, relative movement in the thrust direction of the input member (outer piece and inner piece) with respect to the cover is restricted. Therefore, for example, if the cover is fixed so as not to move in the thrust direction, displacement of the operation handle coupled to the input member in the thrust direction is suppressed. Therefore, the lifter device of this configuration can suppress backlash in the thrust direction of the operation handle operated when the seat is moved up and down by a simple and rational configuration in which the cover is sandwiched between the outer piece and the inner piece.

[2] The second aspect of the present invention is the first aspect described above,
The first through hole provided in the cover is
The input member has a wider hole width in the rotation direction than the arm passed through the first through hole, and the input member is brought into contact with the end portion of the first through hole in the rotation direction. The full stroke position in the rotation direction is regulated.

According to the second aspect, the full stroke position in the rotation direction of the input member is regulated using the first through hole of the cover through which the arm of the inner piece passes. Thereby, it is not necessary to separately provide a restricting portion for restricting the full stroke position, and the structure of the lifter device can be rationalized.

[3] The third aspect of the present invention is the first or second aspect described above,
A shaft portion that is rotatably supported through the outer piece, the inner piece, and the cover in the thrust direction; a flange portion that is sandwiched in the thrust direction between the inner piece and the cover; A shaft member having a shaft support portion that receives the other portion of the pinion gear in the thrust direction and supports the pinion gear in the radial direction.

According to the third aspect, the shaft member and the cover are integrated with the inner piece and the outer piece being sandwiched, and the unit is used as a part of the lifter device (ie, the sub-assembly). Can manage.

FIG. 1 is an outer side view illustrating a schematic configuration of the lifter device according to the first embodiment. FIG. 2 is a side view of the structure on the outer side as seen from the inside of the seat. FIG. 3 is an exploded perspective view showing a state in which the operation handle and the rotation control device are removed from the seat frame. FIG. 4 is a perspective view of the rotation control device viewed from the outside of the seat. FIG. 5 is a perspective view of the rotation control device viewed from the inside of the seat. FIG. 6 is a front view of the rotation control device viewed from the outside of the seat. 7 is a cross-sectional view taken along line VII-VII in FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is an exploded perspective view of the rotation control device viewed from the outside of the seat. 10 is an exploded perspective view showing an assembled state between some of the components shown in FIG. FIG. 11 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. 12 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. FIG. 13 is an exploded perspective view of the rotation control device viewed from the inside of the seat. 14 is an exploded perspective view showing an assembled state between some of the components shown in FIG. FIG. 15 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. FIG. 16 is a state diagram of the feeding unit of the rotation control device when the operation handle is in the neutral position. FIG. 17 is a state diagram of the lock portion. FIG. 18 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the middle position. FIG. 19 is a state diagram of the lock portion. FIG. 20 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the full stroke position. FIG. 21 is a state diagram of the lock portion. FIG. 22 is a state diagram of the feeding unit when the pinion gear is rotated forward by the gravitational action received from the seat side from the state in which the operation handle is pushed down. FIG. 23 is a state diagram of the lock portion. FIG. 24 is a state diagram of the feeding portion when the operation handle is returned from the push-down operation state to the neutral position. FIG. 25 is a state diagram of the lock portion. FIG. 26 is a state diagram of the feeding unit when the operation handle is pulled up from the neutral position to the middle position. FIG. 27 is a state diagram of the lock portion. FIG. 28 is a state diagram in which the rotation of the pinion gear in the push-down operation direction is locked by the stopper. FIG. 29 is a state diagram in which the rotation of the pinion gear in the pulling operation direction is locked by the stopper. 30 is a cross-sectional view corresponding to the line XXX-XXX in FIG. 6 showing the configuration of the main part of the lifter device according to the second embodiment. FIG. 31 is a cross-sectional view corresponding to FIG. 7 illustrating the configuration of the main part of the lifter device according to the third embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<About the schematic configuration of the lifter device 10>
1 to 3 show an automotive seat 1 (hereinafter simply referred to as “seat”) to which a lifter device 10 according to an 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 well-known one, 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 and rear direction so as to be slidable in the front and rear directions. 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 16 (corresponding to the “input gear” of the present invention) and is rotated in the front-rear direction by the pinion gear 18 of the rotation control device 21. It is configured to be. 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. When the operation handle 20 is rotated upward from the neutral position, the rotation control device 21 rotates in the direction in which the rear link 11b is raised from the base member 14, and when the operation handle 20 is rotated downward from the neutral position, the rotation control device. 21 rotates in a direction in which the rear link 11b is lowered on the base member 14. Due to the configuration of the four-bar link described above, the front link 11a also rotates according to the rotation of the rear link 11b, and the height position of the seat cushion 2 with respect to the floor 4 is adjusted according to the operation of the operation handle 20.

<Configuration of rotation control device 21>
4 to 6 show the rotation control device 21 removed from the seat cushion 2. FIG. Hereinafter, the configuration of the rotation control device 21 will be described with reference to FIGS. For the reference numerals of the constituent members of the rotation control device 21 described below, any of FIGS. 4 to 15 is referred to as appropriate.

The rotation control device 21 allows the rotation shaft 22 to pass through a center hole 23c of a support member 23 (corresponding to the “base” of the present invention) as a base member so that the pinion gear 18 protrudes from the left side surface of the support member 23. It is assembled. The support member 23 is fixed to the side frame 13 with the pinion gear 18 passing through the through hole 13 a 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 disc-shaped lock plate 31 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.

The outer peripheral portion of the right side surface of the lock plate 31 is formed with one protrusion 31d protruding in the vertical direction and two protrusions 31e protruding in the front-back direction. The projections 31e are fitted with through

holes

32a and 33a of the

poles

32 and 33 so that the

poles

32 and 33 can swing around the projections 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 forming the external teeth of the

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 plate 31 connected to the

poles

32 and 33 is assembled to the support member 23 as described above.

<Configuration of rotation control device 21>
On the right side surface of the cover 24 formed in a container shape that swells to the right as a whole, a plate-shaped outer plate 41 that constitutes an outer piece of the input member N that is coupled to the operation handle 20 and is rotated (in the present invention). Equivalent to “outer piece”). A projecting pin that protrudes in a round bar shape to the right from the center of the shaft member 25 (corresponding to “another member” of the present invention) having a substantially cylindrical shape is formed in the through hole 24e at the center of the cover 24 and the center hole 41b of the outer plate 41. 25b (corresponding to the “shaft” of the present invention) is inserted through from the left side. In addition, a pair of arcuate openings 24a formed in the cover 24 (corresponding to “first through holes” of the present invention) and a pair of arcuate through holes 41a formed in the outer plate 41 (this A pair of arms formed on a plate-like inner plate 53 (corresponding to the “inner piece” of the present invention) constituting the inner piece of the input member N described above is equivalent to the “second through hole” of the invention. 53a is inserted from the left side.

The pair of arms 53a allows the flange portion 25c of the shaft member 25 and the cover 24 to be disposed between the inner plate 53 and the outer plate 41 in the left-right direction (that is, the direction along the central axis of the lifter device 10). Is inserted into the corresponding through hole 41a of the outer plate 41 until the position sandwiched in the direction (corresponding to “direction”), and the protruding portion inserted into the corresponding through hole 41a at that position (clamping position) corresponds to the outer plate 41. It is welded and joined to the peripheral part on the outer peripheral side of the through hole 41a to be welded (welded portion W (corresponding to the joined portion of the present invention): see FIG. 8).

The cover 24 and the outer plate 41 are slidably coupled to each other via the shaft member 25 by the above coupling. On the upper part of the outer plate 41, an engagement piece 42 is formed to bend to the left side, and the engagement piece 42 is aligned with the inner peripheral side of the engagement piece 24b 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 outer plate 41 is rotated by the operation handle 20, the engagement piece 42 moves so as to be separated from the engagement piece 24 b in the circumferential direction, but when the rotation operation is released, the torsion spring 43 of the torsion spring 43 is moved. Due to the urging force, the engagement piece 42 and the engagement piece 24b are in a position where they overlap each other in the circumferential direction, and the outer plate 41 is returned to the position before the rotation operation.

Further, an inner plate 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).

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 inner plate 53 includes arms 53a extending rightward on the front and rear portions, and each arm 53a passes through the corresponding opening 24a of the cover 24 and passes through the corresponding through hole 41a of the outer plate 41 as described above. is doing. Each opening 24a of the cover 24 has a longer circumferential length than each arm 53a, and each corresponding through hole 41a of the outer plate 41 has a circumferential length substantially the same as each arm 53a. is doing. Therefore, the inner plate 53 is rotated integrally with the outer plate 41, and each circumferential rotation operation is engaged at a position where each arm 53 a hits the circumferential end of each opening 24 a of the cover 24. It has come to be stopped. On the left side surface of the inner plate 53, a pair of feed claws 52 are swingably coupled by fitting the hinge portions 52 b of the feed claws 52 to the corresponding through holes 53 b of the inner plate 53.

<Configuration of Rotation Control Device 21 (Rotation Transmission Plate 36)>
A substantially disc-shaped rotation transmission plate 36 is provided on the left side of the inner plate 53, and the rotation transmission plate 36 is sandwiched between the inner plate 53 and the lock plate 31. Four disk-shaped engagement holes 36a corresponding to the

poles

32 and 33 are formed on the disk surface portion of the rotation transmission plate 36, and the pins 32b of the

poles

32 and 33 are formed in the engagement holes 36a. 33b are inserted so as to be engageable in the circumferential direction. In addition, two elliptical engagement holes 36b are formed in the disk surface portion of the rotation transmission plate 36 corresponding to the protrusions 31d, and the protrusions 31d are engaged in the circumferential direction in the engagement holes 36b. Inserted as possible.

Further, 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 37a of the torsion spring 37 is bent to the left side and is inserted across the long hole 36c of the rotation transmission plate 36 and the long hole 31c of the lock plate 31 and extends in the circumferential direction across the

long holes

36c and 31c. It is provided in a state that exerts an urging force in both directions. 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 applies a biasing force to the protrusion 52d of the feed claw 52 from the inside in the radial direction 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 55b is inserted into and engaged with an engagement hole 53c formed at the center of the lower end of the inner plate 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. The internal teeth 51 of the rotation transmission plate 36 and the internal teeth 34 of the support member 23 are configured to have the same number of teeth.

11 and 15 show the state in which the outer plate 41, the inner plate 53, the cam member 54, the feed claw 52, the internal teeth 51 of the rotation transmission plate 36, and the torsion spring 55 are assembled to the cover 24 as described above. ing. 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 procedure for assembling the rotation control device 21, but the spline 22c of the rotating shaft 22 is finally inserted into the spline hole 25a of the shaft member 25 (corresponding to the “shaft support portion” of the present invention). And further fixing the cover 24 to the support member 23 completes the assembly of the rotation control device 21. The spline hole 25a of the shaft member 25 is formed at the left end portion of the shaft member 25 that is exposed through the center hole 53d (see FIG. 8) of the inner plate 53 from the right side.

Here, as shown in FIG. 9, the feed claw 52, the rotation transmission plate 36, and the lock which are connected between the outer plate 41 and the pinion gear 18 and transmit the rotation of the outer plate 41 to the pinion gear 18 as a feed rotation. A power transmission system composed of the plate 31 is configured as the feeding portion A. Further, a mechanism portion comprising the

respective poles

32 and 33 for stopping the rotation of the pinion gear 18 fed and rotated by the feed portion A with respect to the support member 23 is configured as a lock portion B.

<Configuration of rotation control device 21 (stopper 60)>
A concentric outer peripheral surface 22a having no gear shape is formed between the pinion gear 18 of the rotating shaft 22 and the spline 22b, and the rotating shaft side protrusion 63 is formed on the outer peripheral side of the specific angular position of the outer peripheral surface 22a. Is formed to project in the radial direction. 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 arc-shaped 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 operation 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 in which the operation handle 20 is not operated and the outer plate 41 and the inner plate 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 forming its outer teeth is engaged with the inner teeth 51 of the rotation transmission plate 36 by the urging of the torsion spring 55. As shown in FIG. 17, the

pawls

32 and 33 are in 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. Therefore, the rotation of the lock plate 31 is locked through the engagement of the

poles

32 and 33, and the height of the seat 1 is not changed to the ascending side or the descending side.

<Operation of Rotation Control Device 21 (Operation for Depressing Operation Handle 20)>
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 inner plate 53 is rotated in the direction of the arrow by the rotation of the outer plate 41. As a result, each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a forming the external teeth of the front feed claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and pushes the rotation transmission plate 36 in the direction of the arrow. At this time, the engagement end portion 52 a forming the external tooth of the rear feed claw 52 is not engaged with the internal tooth 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 52c of the rear feeding claw 52 rides on the cam projection 54a of the cam member 54, and the engagement end 52a is separated from the internal teeth 51. .

When the rotation transmission plate 36 is rotated in this way, the corresponding engagement holes 36a of the rotation transmission plate 36 are engaged with the pins 33b of the respective poles 33 as shown in FIG. The end 33c is pushed inward in the radial direction so as to be removed from the internal teeth 34 of the support member 23. Thereby, the lock state of the lock plate 31 in the descending 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 can be transmitted to the lock plate 31. In addition, the open two-dot chain line arrow in a figure represents rotation of the rotation transmission plate 36 which does not appear in illustration.

Specifically, the four engagement holes 36a formed in the rotation transmission plate 36 described above are each formed in a substantially trapezoidal shape that narrows the hole width in the circumferential direction from the inner side to the outer side in the radial direction. . As shown in FIGS. 16 to 17, the four engagement holes 36a described above are arranged so that each of the pawls 32, when the rotation transmission plate 36 is in the neutral position by the urging action of the torsion spring 37 with respect to the lock plate 31. 33

pins

32b and 33b (round pins) are positioned as follows. That is, the two engagement holes 36a into which the pins 32b of the poles 32 are inserted are biased in the circumferential direction with the inclined side surfaces facing the pins 32b in the circumferential direction approaching the clockwise direction in the figure. It is supposed to be positioned in the state. Further, the two engaging holes 36a into which the pins 33b of the poles 33 are inserted are arranged in the circumferential direction, with the inclined side surfaces facing the respective pins 33b facing in the circumferential direction approaching the counterclockwise direction shown in the figure. It can be positioned in a biased state.

With this configuration, the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 18 to 19, so that the two engagement pins into which the pins 33b of the respective poles 33 are inserted. The inclined side surface of the joint hole 36a is brought into contact with these two pins 33b, and the pins 33b are pushed and slid radially inward along the inclined side surface of each engaging hole 36a as the rotation proceeds, The engagement end portions 33c of the respective poles 33 are removed from the internal teeth 34 of the support member 23 while leaving the engagement end portions 32c of the other two poles 32 engaged with the internal teeth 34 of the support member 23. It is designed to rotate.

Similarly, the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 26 to 27 (in the opposite direction), so that the two engagement holes 36a into which the pins 32b of the respective poles 32 are inserted. While the inclined side surface is brought into contact with these two pins 32b, the other two pins 32b are pushed and slid radially inward along the inclined side surface of each engagement hole 36a as the rotation proceeds. The engagement end portion 32c of each pole 32 is rotated so as to be disengaged from the inner teeth 34 of the support member 23 while leaving the engagement end portion 33c of the pole 33 engaged with the inner teeth 34 of the support member 23. It has become.

As shown in FIG. 17, each of the above-described

poles

32 and 33 has their engagement ends 32 c and 33 c meshed with the inner teeth 34 of the support member 23. The

poles

32 and 33 are positioned at the intermediate portion in the radial direction (radial direction) between the protrusion 31e that is the rotation center of the lock plate 31 with respect to the lock plate 31 and the tooth tip of the internal tooth 34. Therefore, each of the

poles

32 and 33 can be efficiently rotated radially inward with respect to the rotational movement amount of the rotation transmission plate 36 to be disengaged from the internal teeth 34 of the support member 23. (See FIGS. 19 and 27). Therefore, the stroke required for the unlocking operation of the

poles

32 and 33 accompanying the operation of the operation handle 20 can be shortened.

Further, as shown in FIGS. 19 and 27, the engagement holes 36a of the rotation transmission plate 36 for pushing the

pins

32b and 33b of the

poles

32 and 33 in the rotation direction are respectively connected to the

pins

32b and 33b (virtual And the inner teeth on the tooth surfaces farthest from the center of rotation (protrusion 31e) of the engaging ends 32c, 33c forming the outer teeth of the

poles

32, 33. The inclined shape of each inclined side surface is set so that the angle α formed by the contact surface with the 34 tooth surfaces is larger than the friction angle defined between these tooth surfaces. The setting of the angle α is also applied to the tooth surfaces other than the tooth surfaces farthest from the rotation center (projection 31e) among the

engaging end portions

32c and 33c forming the external teeth of the

poles

32 and 33. Can be done. Further, as shown in FIG. 17, the

engaging end portions

32c and 33c forming the external teeth of the

respective poles

32 and 33 have a contact surface method of the tooth surfaces of the internal teeth 34 of the support member 23 with which the tooth surfaces contact. The tooth surface shape is such that the angle β formed between the line and the line connecting the contact point and the rotation center (projection 31e) of each

pole

32, 33 is smaller than the friction angle defined between these tooth surfaces. Is set. For this reason, the

engagement end portions

32c and 33c of the

poles

32 and 33 are centered around the protrusion 31e by the force with which the rotation transmission plate 36 presses the

poles

32 and 33 in the rotational direction. 34 can be removed smoothly (see FIGS. 19 and 27).

<Operation of rotation control device 21 (full stroke operation of 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 inner plate 53 coming into contact with the circumferential end of the opening 24a of the cover 24. At this time, as shown in FIG. 20, the rotation of the inner plate 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 so as to slide 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 Rotation Control Device 21 (Influence by Gravity of Sheet 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, the rotational movement amount of the pinion gear 18 is greater than the amount by which the operation handle 20 is pushed down. 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 swinging state of each pole 33 by the engagement hole 36a is released, and each pole 33 meshes with the internal teeth 34 of the support member 23, so that the lock plate 31 rotates in the downward direction. Is locked. Therefore, it is possible to prevent the seat cushion 2 from being lowered (sliding) by gravity applied to the operation handle 20 in the middle of the push-down operation. Thus, the rotation transmission plate 36 is pushed to the position where the engagement hole 36 b is engaged with the lock plate 31, so that each pole 33 that stops rotating in the direction is connected to the inner teeth 34 of the support member 23. When each of the engagement holes 36a to be pushed out of the engagement of the gears and the feed plate rotation via the rotation transmission plate 36 is stopped, the pinion gear 18 locks when there is a reverse input in the direction of further advancement of the feed rotation. The structure includes a cancel structure C that releases the push-out state of each pole 33 that stops the rotation in the direction by each engagement hole 36a as the rotation of the plate 31 proceeds. 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 in which the operation handle 20 has been pushed down and the operation handle 20 is returned to the neutral position. At this time, the outer plate 41 is returned to the neutral position by the urging force of the torsion spring 43, and the inner plate 53 is also returned to the neutral position in synchronization. Therefore, the inner plate 53 is rotated as indicated by an arrow in FIG. Until the inner plate 53 is returned to the neutral position, the rear feed claw 52 is in a state where the pin 52c rides on the cam projection 54a of the cam member 54. However, when the inner plate 53 returns to the neutral position, as shown in FIG. 24, the rear feed claw 52 returns to a state in which the engagement end portion 52 a is engaged with the inner teeth 51 of the rotation transmission plate 36. On the other hand, the front feed claw 52 slides so that the engagement end portion 52a slides on the inner teeth 51 of the rotation transmission plate 36 until the inner plate 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 neutral position. Therefore, as shown in FIG. 25, the engagement ends 32c and 33c of all the

poles

32 and 33 are engaged with the internal teeth 34 of the support member 23, and the lock plate 31 is locked at that position. Therefore, the pinion gear 18 also stops rotating, and the height of the seat cushion 2 is maintained at that position.

<Operation of Rotation Control Device 21 (Operation for Pulling Up 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 inner plate 53 is rotated in the direction of the arrow by the rotation of the outer plate 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 arrow 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 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 manner, 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 (Summary) of Rotation Control Device 21>
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 lifting 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.

In summary, the lifter device 10 of this embodiment is configured as follows. That is, the lifter device (10) has a pinion gear (18) that meshes with the input gear (16) of the link mechanism (12) that moves the seat (1) up and down, and a rotation that corresponds to when the seat (1) moves up and down. A rotation control device (21) for controlling the rotation of the pinion gear (18) disposed between the operation handle (20) operated in the direction and the pinion gear (18), and a part of the pinion gear (18) And a base (23) that is rotatably supported.

The rotation control device (21) is connected to the operation handle (20) and is rotated around the rotation axis of the pinion gear (18) by the rotation operation of the operation handle (20), and the base (23). And a cover (24) which is coupled to cover the inner region of the rotation control device (21) and to rotatably support the other part of the pinion gear (18) via another member (25).

The input member (N) is arranged in the above-mentioned region (in other words, inside the cover (24) in the thrust direction) covered by the cover (24), and rotates the operation handle (20) to the pinion gear (18). And an outer piece (53) disposed outside the region (in other words, in the thrust direction) with the cover (24) interposed therebetween.

The inner piece (53) has an arm (53a) penetrating in a thrust direction through a first through hole (24a) provided in the cover (24) and a second through hole (41a) provided in the outer piece (41). And the cover (24) between the inner piece (53) and the outer piece (41) in a state where the arm (53a) is passed through the first through hole (24a) and the second through hole (41a). A coupling portion (W) that couples the arm (53a) and the outer piece (41) at a clamping position that is indirectly clamped via another member (25) in the thrust direction.

Thus, in the state where the cover (24) is indirectly sandwiched between the outer piece (41) and the inner piece (53) constituting the input member (N) via the separate member (25), the outer piece (41 ) And the arm (53a) of the inner piece (53) are coupled. Thereby, the relative movement in the thrust direction of the input member (N, specifically, the outer piece (41) and the inner piece (53)) with respect to the cover (24) is restricted. Here, in this example, the cover (24) is fixed to the base (23) assembled to the side frame (13) and does not move in the thrust direction. As a result, the displacement in the thrust direction of the operation handle (20) coupled to the input member (N) is suppressed. Therefore, the lifter device (10) has an operation handle that is operated when the seat (1) is moved up and down by a simple and rational configuration in which the outer piece (41) and the inner piece (53) sandwich the cover (24). The backlash in the thrust direction of (20) can be appropriately suppressed.

The first through hole (24a) provided in the cover (24) has a wider hole width in the rotation direction than the arm (53a) passed through the first through hole (24a). The full stroke position of the input member (N) in the rotation direction is regulated by the contact between (53a) and the end of the first through hole in the rotation direction.

With such a configuration, the input member (N) can be rotated by using the first through hole (24a) of the cover (24) through which the arm (53a) of the inner piece (53) is passed. Regulate the full stroke position in the direction. Thereby, it is not necessary to separately provide a restricting portion for restricting the full stroke position, and the structure of the lifter device (10) can be rationalized.

The separate member (25) includes an outer piece (41), an inner piece (53), and a shaft (25b) that is rotatably supported through the cover (24) in the thrust direction, and an inner piece (53). A shaft member having a flange portion (25c) sandwiched between the cover (24) in the thrust direction and a shaft support portion (25a) that receives the other portion of the pinion gear (18) in the thrust direction and supports the radial direction. 25).

With such a configuration, the shaft member (25) and the cover (24) are sandwiched between the inner piece (53) and the outer piece (41) so that they are integrated, and the lifter device (10 ) Can be managed as a partial unit (ie, sub-assembly) used in manufacturing.

<About the schematic configuration of the lifter device 10>
Next, the configuration of the lifter device 10 applied to the sheet 1 of Example 2 will be described with reference to FIG. In the present embodiment, a pair of arms 53 a extending from the inner plate 53, so that the protruding portions inserted into the corresponding through holes 41 a of the outer plate 41 are pressed against the right side surface of the outer plate 41. The inner plate 53 and the outer plate 41 are integrally coupled to each other by being caulked in a shape that protrudes in the direction (the caulking portion P (corresponding to the “coupling portion” of the present invention)). Since the configuration other than the above is the same as the configuration shown in the first embodiment, the same reference numerals are given and description thereof is omitted.

<About the schematic configuration of the lifter device 10>
Next, the configuration of the lifter device 10 applied to the sheet 1 of Example 3 will be described with reference to FIG. In this embodiment, the inner plate 53 is assembled in such a manner that the cover 24 is directly sandwiched in the thrust direction without using another member (another member such as the shaft member 25 shown in the first embodiment) between the inner plate 53 and the outer plate 41. It is set as the structure. Along with this, the shaft portion extending to the right side of the rotating shaft 22 is formed into a shaft shape extending in a round bar shape without splines on the outer peripheral surface, and the center hole 53d of the inner plate 53, the through hole 24e of the cover 24, and the outer plate 41 is inserted into the center hole 41b of the 41 in a shape penetrating the shaft 41b and is rotatably supported. With the above configuration, since the member interposed between the inner plate 53 and the outer plate 41 is configured only by the cover 24, the entire structure can be downsized in the thrust direction. Since the configuration other than the above is the same as the configuration shown in the first embodiment, the same reference numerals are given and description thereof is omitted.

The above configuration is summarized as follows.
The input member (N) is arranged in a region inside the rotation control device (21) covered with the cover (24), and transmits the rotation of the operation handle (20) to the pinion gear (18) and transmits it as rotation. 53) and an outer piece (41) disposed outside the region with the cover (24) interposed therebetween. The inner piece (53) has an arm (53a) penetrating in a thrust direction through a first through hole (24a) provided in the cover (24) and a second through hole (41a) provided in the outer piece (41). And thrust the cover (24) between the inner piece (53) and the outer piece (41) in a state where the arm (53a) is passed through the first through hole (24a) and the second through hole (41a). A coupling portion (W) that couples the arm (53a) and the outer piece (41) at a clamping position directly sandwiched in the direction.

<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-described embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on a vehicle such as an airplane, a ship, or a train, or a seat installed in a movie theater.

Further, the shaft member 25 may be configured to be integrated with the cover 24 so that the end portion of the pinion gear 18 is received in the thrust direction by the shaft support portion 25a and supported rotatably, or the shaft support portion 25a and the pinion gear 18 The end portion may be integrated with a spline or the like and supported so as to be rotatable with respect to the cover 24.

This application is based on a Japanese patent application filed on April 27, 2018 (Japanese Patent Application No. 2018-086133), the contents of which are incorporated herein by reference.

According to the lifter device of the present invention, for example, it is possible to suppress a positional shift (backlash) in the thrust direction of the operation handle operated when the seat is moved up and down with a rational configuration. The present invention exhibiting this effect is useful, for example, for a seat such as an automobile.

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 (base)
23a Through hole

23b Guide recess

23c Center hole 24 Cover 24a Opening (first through hole)

24b Engagement piece

24c Projection piece

24d Leg part 24e Through-hole 25 Shaft member (separate member)
25a Spline hole (shaft support)
25b Protruding pin (shaft)
25c Flange part 31 Lock plate 31a Sliding surface part 31b Spline hole 31c

Long hole

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 part

35b End part 36 Rotation transmission plate

36a Engagement hole

36b Engagement hole 36c Long hole 36d Center hole 37 Torsion spring 37a End part 41 Outer plate (outer piece)
41a Through hole (second through hole)
41b Center hole 42 Engagement piece 43 Torsion spring 43a End part 51 Internal tooth 52 Feeding claw 52a Engagement end part

52b Hinge part 52c Pin

52d Projection part 53 Inner plate (inner piece)
53a Arm 53b Through hole

53c Engagement hole

53d Center hole 54 Cam member 54a Cam projection 54b Pin 55 Torsion spring 55a End portion 55b Projection 60 Stopper 61 Support member side projection 62 Engagement piece 63 Rotating shaft side projection α Angle formed β Angle formed C Cancel structure A Feeding part B Locking part N Input member W Welding part (joint part)
P Caulking part (joint part)

Claims

A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down;
A rotation control device that is arranged so as to connect between an operation handle that is operated in a corresponding rotation direction when the seat is moved up and down and the pinion gear, and that controls the rotation of the pinion gear;
A lifter device comprising a base that rotatably supports a part of the pinion gear,
The rotation control device is
An input member coupled to the operation handle and rotated about a rotation axis of the pinion gear by a rotation operation of the operation handle;
A cover coupled to the base and covering a region inside the rotation control device and rotatably supporting the other part of the pinion gear directly or indirectly via another member;
The input member is
An inner piece arranged in the region covered by the cover and transmitting the rotation of the operation handle to the pinion gear as a rotation, and an outer piece arranged outside the region across the cover,
The inner piece is
An arm penetrating in a thrust direction through a first through hole provided in the cover and a second through hole provided in the outer piece;
In a state where the arm is passed through the first through hole and the second through hole, the cover is placed directly in the thrust direction between the inner piece and the outer piece or indirectly through the separate member. A coupling portion that couples the arm and the outer piece at a clamping position where the clamping is performed.
Lifter device.
The lifter device according to claim 1,
The first through hole provided in the cover is
The input having a hole width wider in the rotation direction than the arm passed through the first through-hole, and abutting between the arm and an end of the first through-hole in the rotation direction. Restricting the full stroke position of the member in the rotational direction;
Lifter device.
The lifter device according to claim 1 or 2,
The separate member is
A shaft portion that is rotatably supported through the outer piece, the inner piece, and the cover in the thrust direction, a flange portion that is sandwiched in the thrust direction between the inner piece and the cover, and the other of the pinion gear A shaft member having a shaft support portion that receives the portion in the thrust direction and supports the portion in the radial direction,
Lifter device.