JP2006006712A - Reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate trouble of using two operation handles separately corresponding to usage, in which two operation handles are used for bringing down a seat back of vehicle seat forward and for adjusting angles of inclination of the seat back. <P>SOLUTION: Pawls (6, 7 and 8) along a guide (14) of a housing (2) are arranged so as to freely reciprocate radially with a cam (5). A claw part (10a) of an operation plate (10) is engaged with a cam hole (5b) provided on the cam (5) so that the operation plate (10) is linearly moved radially corresponding to movement of the cam (5). The linear movement of the operation plate (10) enables engagement and removal of an upper gear (3) of a memory plate (11) with or from an internal gear (17). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reclining device suitable for an automobile seat.

  A reclining device is arranged between the seat cushion frame and the seat back frame of the vehicle seat so that the inclination angle of the seat back can be adjusted to the passenger's preferred angle, or the seat back is moved forward for walk-in. Making it possible is well known. In this type of device, a memory mechanism for returning the seat back to the original position is indispensable.

  A conventional reclining device requires two levers, a lever for adjusting the angle of the seat back and a lever dedicated to forward-turning. For this reason, the passengers use the levers according to their purpose.

Japanese Patent Laid-Open No. 11-70028

  The use of a lever that adjusts the seat back tilt and a lever that is used exclusively for the front-end has the problems of bothering the passenger to use the lever according to the application, the need for two levers, and an increase in the number of parts. Yes. In particular, the space for allowing the lever rotation angle and the space for the occupant's hand are large, which restricts the degree of freedom in seat design.

  Therefore, this invention makes it the subject which should be solved to eliminate the malfunction of the prior art mentioned above.

  In order to solve the above-described problems, the present invention provides a cam hole on the surface of a cam that rotates integrally with the operation shaft, engages the claw portion of the operation plate with the cam hole, and operates the operation plate according to the movement of the cam A technical means is adopted in which the memory plate is removably engaged with the cover in accordance with the movement of the operating plate.

  The adoption of this technical means makes it possible to rotate the memory plate with the cover around the operating axis in a form independent of the actuating plate. This eliminates the need for an operating lever for the memory plate.

  In the present invention, the operating lever is moved in the radial direction in accordance with the movement of the cam. This radial movement causes the memory plate to move in the radial direction, but the rotation of the memory plate around the operating axis is not blocked by the actuating plate.

  According to the present invention, the housing, the case that is rotatable relative to the housing and having the internal teeth, the cam that rotates following the rotation of the operation shaft, and the reciprocating in the radial direction according to the movement of the cam A pole that moves and engages with the internal teeth of the case, an operating plate having a claw portion that engages with the operating shaft and engages with a cam hole provided in the cam, Reclining characterized in that it has a memory plate that can reciprocate in the radial direction according to movement, the memory plate can be locked to the case, and the memory plate and the case are engaged and disengaged by the rotation of the cam An apparatus is provided.

  Preferably, a holding plate is disposed between the cam and the operating plate, and the holding plate has a groove portion that receives the protrusion portion of the pole, a claw portion that contacts the memory plate, and an engagement surface that can freely contact the pin of the case. The engagement between the portion and the groove allows rotation of the case relative to the housing. The cam, the holding plate, and the memory plate receive the biasing force of the spring, and the housing is fixed to the seat cushion frame and the case is fixed to the seat back frame.

  More preferably, the pole is composed of three poles arranged at equal intervals, one of the poles has a protrusion that fits into the long hole of the working plate, and the cylindrical part of the working plate has the center hole of the memory plate. Push. The pin provided on the cam is inserted into the cam hole of each pole, the memory plate is locked to another internal tooth of the case, and the case is rotated relative to the housing with the pole not engaged with the internal tooth of the case Make it possible. The contact between the engaging surface of the holding plate and the pin of the case offsets the holding plate with respect to the axis of the operation shaft.

  With the above configuration, it is possible to adjust the angle of the seat back, move the seat back forward to get on and off the rear seat, and return to the seat back angle before moving forward with a single operation lever of the reclining device. Since the troublesomeness of the passenger re-adjusting the seat back angle after returning to the front is eliminated and the operation lever can be simplified, the number of parts can be reduced, and the cost and weight can be reduced.

As shown in FIG. 1, the seat reclining device 1 includes a circular housing 2, an upper gear 3 as a circular case, and a ring 4 that couples the peripheral edges of the housing 2 and the upper gear 3. A cam 5, three poles 6, 7, 8, a holding plate 9, an operation plate 10, and a memory plate 11 are accommodated in an internal space defined by the housing 2 and the upper gear 3.
The cam 5 is biased in one direction by the lock spring 12, the memory plate 11 receives the biasing force of the first spring 18, and the holding plate 9 receives the biasing force of the second spring 13.
Please refer to FIG. Pole 6, 7, 8 is arranged between a plurality of pairs of guides 14 formed on the inner surface of the housing 2 so as to be movable in the radial direction. Due to the movement of the cam 5 to be joined, it moves radially outward or inward.

The cam 5 has three pins 5a, 5a, 5a and a cam hole 5b, and the pins 5a, 5a, 5a are inserted into the cam holes 6a, 7a, 8a of the poles 6, 7, 8 respectively.
The pole 6 has a long protrusion 6b in the radial direction, and the pole 8 has a long protrusion 8b in the circumferential direction.
The poles 6, 7, 8 have outer teeth 6 c, 7 c, 8 c cut at the outer edges thereof, and these outer teeth 6 c, 7 c, 8 c can be engaged with the inner teeth 16 cut inside the upper gear 3. It has become.

The housing 2 is fixed to the seat cushion frame of the seat, and the upper gear 3 is fixed to the seat back frame, but the external teeth 6c, 7c, and 8c of the poles 6, 7, and 8 mesh with the internal teeth 16 of the upper gear 3. Sometimes (the state of FIG. 2), the position of the seat back is kept constant.
In the state of FIG. 2, when the operating shaft 15 is rotated clockwise, the pins 5a, 5a, 5a are moved clockwise, and the poles 6, 7, 8 are moved radially inward by the urging force of the lock spring 12. The inner gear 16 and the outer teeth 6c, 7c, and 8c are disengaged from each other, and the upper gear 3 is brought into a free state with respect to the housing 2. That is, the seat back can be moved forward and moved to the reclining position.
The housing 2 may be fixed to the seat back frame and the upper gear 3 may be fixed to the seat cushion frame.

  As shown in FIG. 3, the holding plate 9 is arranged so as to overlap the poles 6, 7, and 8. The holding plate 9 includes a projection 9 a, a claw 9 b that faces the projection 9 a, an engagement surface 9 c that faces the projection 3 a of the upper gear 3, and a groove 9 d that defines the projection 9 a. A central long hole 9e inserted into the part and a working hole 9f extending in the circumferential direction are provided.

The operation plate 10 is stacked on the holding plate 9. The operating plate 10 has a cylindrical portion 10 c that fits into the cylindrical portion of the operation shaft 15, a long hole 10 b that extends in the radial direction, and a claw portion 10 a that engages with the cam hole 5 b of the cam 5.
When the cam 5 moves in the direction in which the external teeth 6c, 7c, 8c of the poles 6, 7, 8 are detached from the internal teeth 16, the claw portion 10a of the operating plate 10 moves the operating plate 10 in the radial direction through the cam hole 5b. This movement is a movement in a direction in which the long hole 10 b linearly moves radially inward with respect to the protrusion 6 b of the pole 6.

  The memory plate 11 is overlaid on the working plate 10. The memory plate 11 has a center hole 11a and external teeth 11b. The external teeth 11 b can be freely engaged with and disengaged from other internal teeth 17 of the upper gear 3 in accordance with the radial movement of the memory plate 11. When the cam 5 moves in a direction to disengage the external teeth 6c, 7c, 8c of the poles 6, 7, 8 from the internal teeth 16, the cylindrical portion 10c of the operating plate 10 moves the memory plate 11 in the radial direction. Then, the outer teeth 11 b are engaged with another inner teeth 17. This makes it possible to memorize the sheet position.

The operation for fixing the seat back tilt angle will be described. When an operation lever (not shown) engaged with the operation shaft 15 is released, the poles 6, 7, and 8 that receive the urging force of the lock spring 12 move radially outward, and the external teeth 6c, 7c, and 8c are moved. The seat back meshes with the internal teeth 16 and the seat back is fixed to the seat cushion. The cam 5 and the poles 6, 7, 8 have cam surfaces provided on the back surfaces of the respective poles in contact with the cam surface on the periphery of the cam 5, and the poles 6, 7, 8 follow the rotation of the cam 5, thereby , 5a are guided in the radial direction.
The positional relationship of each member at this time is shown in FIG. The outer teeth 11 b of the memory plate 11 are detached from the inner teeth 17, the side edges of the holding plate 9 abut against the claw portions 9 b, and the protruding portions 9 a are in contact with the protruding portions 8 b of the pole 8.

When the operation lever is operated against the urging force of the lock spring 12, the operation shaft 15 rotates the cam 5, and moves the poles 6, 7, and 8 inward in the radial direction. As a result, the external teeth 6 c, 7 c, 8 c of the poles 6, 7, 8 are detached from the internal teeth 16. Since the cam hole 5b of the cam 5 is engaged with the claw portion 10a of the operation plate 10, the rotation of the cam 5 linearly moves the operation plate 10 radially outward. This linear movement of the operating plate 10 moves the memory plate 11 radially outward and engages the outer teeth 11 b with the inner teeth 17. That is, the seat back position memory is performed (see FIG. 7).
Since the central hole 11a of the memory plate 11 is fitted into the cylindrical portion 10c of the operation plate 10, the memory plate 11 follows the movement of the operation plate 10.

As shown in FIG. 7, the outer teeth 6c, 7c, 8c of the poles 6, 7, 8 are disengaged from the inner teeth 16, and the outer teeth 11b of the memory plate 11 are engaged with the inner teeth 17, so that the seat back is preferred. The memory plate 11 rotates together with the upper gear 3 when moved to the position. However, when the operation lever is released, the cam 5 that receives the urging force of the lock spring 12 moves the poles 6, 7, and 8 in the radial direction. The outer teeth 6 c, 7 c and 8 c mesh with the inner teeth 16, and the outer teeth 11 b of the memory plate 11 are detached from the inner teeth 17.
Thereafter, the seat back is returned to the reference position by the first spring 18 that biases the memory plate 11 or the second spring 13 that biases the holding plate 9. In this state, the protrusion 9 a of the holding plate 9 contacts the protrusion 8 b of the pole 8, and the memory plate 11 contacts the claw 9 b of the holding plate 9. These contacts are held by both springs 18 and 13.

  The forward movement of the seat back will be described with reference to FIG. The operation lever is operated, the operation shaft 15 is operated, the cam 5 and the poles 6, 7, 8 are operated, and the external teeth 6 c, 7 c, 8 c of the poles 6, 7, 8 are engaged with the internal teeth 16 of the upper gear 3. The outer teeth 11b of the memory plate 11 are engaged with the other inner teeth 17 of the upper gear 3. When the seat back is moved forward, the pin 3a of the upper gear 3 pushes the engaging surface 9c of the holding plate 9, and the holding plate 9 is offset with respect to the protruding portion 8b, so that the protruding portion 8b enters the groove 9d. It will be. As a result, the pole 8 is forcibly maintained at the position shown in FIG. 8, whereby the cam 5, the poles 6 and 7 are brought into a stationary state, the released state of the external teeth 6c, 7c and 8c is maintained, and the seat back is moved forward. State is maintained.

When the seat back is returned backward to return the seat back to the seating position, the upper gear 3 rotates together with the memory plate 11. At this time, the holding plate 9 holds the pole 8 in the disengaged state. Further rotation of the upper gear 3 causes the pin 3c to move away from the engaging surface 9c, thereby eliminating the offset of the holding plate 9. When the memory plate 11 is moved forward and returned to the angle before the operation, the memory plate 11 pushes the claw portion 9b of the holding plate 9 to rotate the holding plate 9 to rotate the protrusion 8b of the pole 8 and the groove portion 9d of the holding plate 9. Release the engagement. Accordingly, the poles 6, 7, and 8 can move radially outward, and the poles 6, 7, and 8 are in a fixed (locked) relationship with the upper gear 3.
Thus, the seat back returns to the previous memory position.

  With the above configuration, it is possible to adjust the angle of the seat back, move the seat back forward to get on and off the rear seat, and return to the seat back angle before moving forward with a single operation lever of the reclining device. Since the troublesomeness of the passenger re-adjusting the seat back angle after returning to the front is eliminated and the operation lever can be simplified, the number of parts can be reduced, and the cost and weight can be reduced.

It is a disassembled perspective view of the seat reclining device of an example of the present invention. It is a top view which shows the relationship between a cam and a pole. It is a top view which shows the state which combined the holding plate and the action | operation plate with the cam and the pole. It is a top view of a memory plate. It is a longitudinal cross-sectional view of a seat reclining device. It is a top view which shows the state by which the cover was locked with respect to the housing. It is a top view which shows the time of the unlocking | release at which the external tooth of a memory plate meshes with an internal tooth. It is a top view which shows the forward-turned state of a seat back.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reclining apparatus 2 Housing 3 Upper gear 3b Protrusion part 5 Cam 5a, 5a, 5a Pin 6, 7, 8 Pole 6a, 7a, 8a Cam hole 6b, 8b Protrusion part 6c, 7c, 8c External tooth 9 Holding plate 9a Protrusion part 9b Claw part 9c Engagement surface 9d Groove part 9e Long hole 9f Working hole 10 Actuation plate 10a Claw part 10b Long hole 10c Cylindrical part 11 Memory plate 11a Center hole 11b External teeth 12, 13, 18 Spring 14 Guide 15 Operation shaft 16, 17 In tooth

Claims (6)

  A housing, a case that is rotatable relative to the housing and has internal teeth, a cam that rotates following the rotation of the operating shaft, and a reciprocating motion in the radial direction according to the movement of the cam, A pawl that can be meshed with the teeth, an operating plate that has a claw portion that fits into the operating shaft and engages with a cam hole provided in the cam, and a radial direction that fits into the operating shaft and moves according to the movement of the operating plate And a reciprocating memory plate, the memory plate being freely engageable with the case, and the memory plate and the case being engaged and disengaged by rotation of the cam.   A holding plate is disposed between the cam and the operating plate, and the holding plate has a groove portion that receives the protrusion portion of the pole, a claw portion that contacts the memory plate, and an engagement surface that can freely contact the pin of the case. The reclining device according to claim 1, wherein the engagement with the groove allows rotation of the case relative to the housing.   3. The reclining device according to claim 2, wherein the cam, the holding plate, and the memory plate receive a biasing force of a spring, and the housing is fixed to the cushion frame of the seat and the case is fixed to the seat back frame.   It consists of three poles arranged at equal intervals, one of the poles has a protrusion that fits into the long hole of the working plate, and the cylindrical part of the working plate pushes the center hole of the memory plate The reclining device according to claim 3.   The pin provided on the cam is inserted into the cam hole of each pole, the memory plate is locked to another internal tooth of the case, and the case is rotated relative to the housing with the pole not engaged with the internal tooth of the case The reclining device according to claim 4, which is made possible. 6. The reclining device according to claim 5, wherein the contact between the engaging surface of the holding plate and the pin of the case offsets the holding plate with respect to the axis of the operation shaft.

Images