JPH0595341U - Fine reclining mechanism for seat reclining mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To enable stepless reclining fine adjustment of a seat with a reclining mechanism. A back frame (31) is fixed to one side of a lower end of the back frame (31), and is interposed between the back frame (31) and the upper arm (32). -The intermediate plate 21 that is swingably mounted in the front-rear direction on the support shaft 34 for the frame, the gear 23 that is rotatably mounted on the support shaft 34, and the support shaft 34 that is eccentrically provided on the gear 23.
The lower arm 3 and the drive plate 24 that is rotatably mounted above and that fits into the fitting recess 21b provided in the intermediate plate 21.
A fine adjustment mechanism that includes a sector gear 22 that is rotatably assembled to 3 and meshes with a gear 23, and an operation lever 25 that rotates the sector gear 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reclining fine adjustment mechanism for a seat with a reclining mechanism.

[0002]

[Prior Art]

 In the seat with reclining mechanism, the reclining mechanism is configured as shown in the publication "Automotive Engineering Handbook, Vol. 6, pages 1-26 (Japan Society of Automotive Engineers, issued September 30, 1983)". The seat back is locked to the seat cushion by engaging the pole with the ratchet, and the seat back is disengaged from the ratchet to adjust the tilt angle of the seat back and forth. -The seat back is made rotatable in the front-back direction, and in this state, the seat back is freely rotated forward and rearward, and then the pole is re-engaged with an arbitrary position of the ratchet teeth to seat the seat back. The means to lock to the cushion is adopted.

[0003]

[Problems to be solved by the device]

 As described above, in the seat with the reclining mechanism described above, the inclination angle of the seat back is adjusted by changing the meshing position with respect to the teeth of the ratchet of the pole, and the minimum adjustment angle is, for example, about 2 degrees. Due to such a large angle, the minimum adjustment pitch is, for example, about 15 mm in the portion above the seat back, and fine adjustments beyond that are impossible. Therefore, an object of the present invention is to provide a mechanism capable of finely adjusting the inclination angle of the seatback in a seat with a reclining mechanism, that is, a fine reclining adjustment mechanism.

[0004]

[Means for Solving the Problems]

 According to the present invention, the lower arm provided at the rear end of the cushion frame forming the seat cushion is provided with the upper arm provided at the lower end of the back frame forming the seat back in the front-back direction through the reclining mechanism. A reclining fine adjustment mechanism for a seat with a reclining mechanism that is rotatably assembled. The reclining fine adjustment mechanism is fixed to one side of the lower end of the back frame and is interposed between the back frame and the upper arm. An intermediate upper end that is rotatably attached to the upper arm, and a lower end that is rotatably attached to the rotation support shaft for the cushion frame of the back frame. A plate, a gear rotatably mounted on the rotation supporting shaft, and an eccentric gear provided on the plate, which is rotatable on the rotation supporting shaft. A disk-shaped eccentric drive plate that is fitted to a fitting recess provided in the intermediate plate and a sector gear that is rotatably fitted to the lower arm and meshes with the gear. It is characterized by being provided with an operation lever for rotating the sector gear.

[0005]

[Operation and effect of the device]

 In the reclining fine adjustment mechanism configured as described above, when the operation lever constituting the reclining fine adjustment mechanism is rotated when the seatback is locked by the reclining mechanism, the sector gear rotates and eccentricity integrated with the gear. The drive plate rotates. Therefore, the intermediate plate to which the eccentric drive plate is fitted swings the rear end in the front-rear direction about the upper end of the intermediate plate, and the back frame integrated with the intermediate plate is rotated in the front-rear direction. As a result, the seatback can be steplessly rotated in the front-rear direction according to the operation amount of the operation lever, and the inclination angle of the seatback in the front-rear direction can be finely adjusted.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a reclining mechanism including a reclining fine adjustment mechanism (hereinafter referred to as a fine adjustment mechanism) according to the present invention. FIG. 2 shows an exploded perspective view of both mechanisms. The reclining mechanism 10 is publicly known, and has a ratchet 11, a pole 12, a cam 13, a release lever 14 and a return spring 15 as its constituent members. Further, the fine adjustment mechanism 20 has an intermediate plate 21, a sector gear 22, a gear 23, a drive plate 24 and an operating lever 25 as its constituent members.

The ratchet 11 which constitutes the reclining mechanism 10 is fixed to an upper arm 32 which constitutes a part of a back frame 31 of the seat back, and the lower end portion of the upper arm 32 constitutes a part of a cushion frame of the seat cushion. It is attached to the rear end portion of the lower arm 33 which is configured so as to be rotatable in the front-rear direction via a hinge pin 34. The ratchet 11 is located coaxially with the hinge pin 34 between the upper arm 32 and the lower arm 33. The pole 12 is swingably assembled to the lower arm 33, and its tooth portion is positioned so as to be able to mesh with and separate from the arc-shaped tooth portion of the ratchet 11. The release lever 14 is integral with the cam 13 and is rotatably attached to the lower arm 33.

The return spring 15 is hooked between the release lever 14 and the lower arm 33, urges the release lever 14 counterclockwise in the drawing to hold it in the non-operating position, and causes the cam 13 to move to the back of the pole 12. The teeth of the pole 12 are brought into contact with each other to mesh with a part of the teeth of the ratchet 11. The upper arm 32 is always urged forward by the action of a spiral spring 35 interposed between the upper arm 32 and the hinge pin 34, but the upper arm 32 is prevented from rotating in the front-rear direction by the engagement of the pole 12 with the ratchet 11. To do. That is, the seat back is locked to the seat cushion by the action of the reclining mechanism 10.

When the release lever 14 is rotated in the clockwise direction in the figure against the return spring 15 in this state, the cam 13 separates from the back of the pawl 12, and the cam hole provided in the release lever 14 and the pawl 12 The pole 12 is separated from the ratchet 11 by a cooperation action with a cam pin that is provided in the cam hole and is engaged with the cam hole, and the upper arm 32 is unlocked from the lower arm 33, and the back frame 31 and the back frame 31 and this are released. The integrated seat back can be rotated in the front-rear direction, and the tilt angle of the seat back in the front-rear direction can be adjusted. After that, when the rotation operation of the release lever 14 is released, the cam 13 and the pole 12 return. The pole 12 meshes with the tooth portion of the ratchet 11 at a predetermined position, and the seat back is locked with respect to the seat cushion. It

Therefore, the intermediate plate 21 constituting the fine adjustment mechanism 20 is a plate having a predetermined length in the vertical direction and having a shape similar to the upper arm 32, and is attached to the bracket 31a of the back frame 31 at the upper end portion and the intermediate portion thereof. It is fixed and integrated. Further, the intermediate plate 21 is attached to the upper arm 32 at the upper end thereof so as to be rotatable in the front-rear direction by a bush 36a and a bolt 36b, and is inserted at the lower end into the arcuate elongated hole 21a. The hinge pin 34 is attached so as to be swingable in the front-rear direction. The gear 23 and the drive plate 24 are eccentrically integrated with each other, and are rotatably mounted on the hinge pin 34. The drive plate 24 is fitted in the fitting recess 21b of the intermediate plate 21.

The sector gear 22 is provided with an arcuate tooth portion at its tip end, and is rotatably assembled to the lower arm 33 via the spring coupler 26 at its base end and meshes with the gear 23. An operating lever 25 is attached to the drive shaft of the coupler device 26. The coupler device 26 is known as a spring coupler device, and transmits the driving force in the vertical turning operation of the operating lever 25 to the sector gear 22 and the gear 23, and also transmits the driving force from the gear 23 to the sector gear 22. It functions to prevent it.

In the seat with the reclining mechanism including the fine adjustment mechanism 20 configured as described above, the seat back can be locked with respect to the seat cushion by the locking action of the reclining mechanism 10 and the reclining mechanism can be used. By releasing the lock by the mechanism 10, the tilt angle of the seat back in the front-rear direction can be adjusted as in the conventional case. Further, when the reclining mechanism 10 is locked, the tilt angle of the front-back direction of the seat back can be finely adjusted infinitely by operating the fine adjustment mechanism 10.

That is, in the fine adjustment mechanism 20, when the operation lever 25 is rotated while the seat back is locked by the reclining mechanism 10, the sector gear 22 is rotated to rotate the gear 23 and the gear 23. The integrated drive plate 24 rotates. Since the drive plate 24 is eccentric with respect to the gear 23, the intermediate plate 22 into which the drive plate 24 fits swings its rear end in the front-rear direction around the bolt 36b supporting the upper end thereof. As a result, the back frame 31 integrated with the intermediate plate 22 is rotated in the front-rear direction, and the seatback is continuously rotated in the front-rear direction according to the operation amount of the operation lever 25, so that the seatback is moved in the front-rear direction. The tilt angle of can be adjusted finely.

[Brief description of drawings]

FIG. 1 is a side view of a reclining mechanism including a reclining fine adjustment mechanism according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the reclining mechanism and the fine adjustment mechanism.

[Explanation of symbols]

10 ... Reclining mechanism, 11 ... Ratchet, 12 ...
Pole, 14 ... Release lever, 20 ... Reclining fine adjustment mechanism, 21 ... Intermediate plate, 21a ... Arc-shaped long hole, 21b ... Fitting recess, 22 ... Sector gear, 23 ... Gear, 24 ... Drive plate (eccentric drive plate) , 25 ... operating lever,
31 ... Back frame, 32 ... Upper arm, 33 ... Lower arm.

Claims (1)

[Scope of utility model registration request] 1. A lower arm provided at a rear end portion of a cushion frame which constitutes a seat cushion, and an upper arm provided at a lower end portion of a back frame which constitutes a seat back are rotated in a front-rear direction through a reclining mechanism. A reclining fine adjustment mechanism for a seat with a reclining mechanism that is movably assembled, and the reclining fine adjustment mechanism is fixed to one side of the lower end of the back frame and is interposed between the back frame and the upper arm and the upper end thereof. An intermediate plate rotatably attached to the upper arm in the front-rear direction and rotatably attached to the rotation support shaft for the cushion frame of the back frame at the lower end in the front-rear direction. A gear that is rotatably mounted on the rotation support shaft and is eccentrically provided on the gear so that it can rotate on the rotation support shaft. A disk-shaped eccentric drive plate that is attached to the intermediate plate and is fitted in a fitting recess provided in the intermediate plate, a sector gear that is rotatably assembled to the lower arm and meshes with the gear, and a sector gear that rotates. A reclining fine adjustment mechanism for a seat with a reclining mechanism, which is equipped with an operation lever that is dynamically operated.