JPH0456605B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a reclining seat device suitable for automobiles.

[Prior Art] Conventionally, as a reclining seat device for setting the backrest of a seat in an automobile to an optimal driving position, for example,
There is one mentioned in the publication.

That is, the reclining seat device has a fixed bracket fixed to the seat cushion side, a movable arm fixed to the seat back side, and the movable arm can be rotated freely relative to the fixed bracket and at a predetermined rotation position. a rotation adjustment means for restraining the movable arm; the rotation adjustment means includes a lock plate having an engagement latch that removably engages with latch teeth formed on the movable arm; and an operation for actuating the plate. The lock plate and the operating lever are provided on the fixed bracket side.

[Problems to be Solved by the Invention] In a reclining seat device having such a structure, in order to adjust the rotation of the seat back, it is necessary to operate the operating lever to disengage the engagement latch of the lock plate from the latch teeth of the movable arm and release the seat back. After releasing the restraint, rotate the arm to the desired position, and then engage the lock plate's engagement latch with the latch teeth of the movable arm again to obtain the predetermined amount of rotation. Adjustment is possible.

Since the engagement latch and the latch teeth are made strong enough to withstand the impact load applied to the movable arm, the pitch between the troughs of the latch teeth is set large. The minimum amount of rotation that the movable arm moves one pitch is determined by the pitch between the valleys, so if the pitch of the latch teeth is large, the engagement with the engagement latch will become coarse, making it difficult to make fine adjustments. However, in some cases, there was a fear that the optimum driving position could not be obtained.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a reclining seat device that allows large adjustment of the reclining angle and small fine adjustment of the reclining angle.

[Means for solving problems]

To achieve the above object, the present invention provides a seat cushion that has a handle on one side, is movable in the axial direction, and is provided with a sun gear on a rotatable handle shaft, and has the handle shaft as the center of rotation. A second internal gear is provided in parallel to a fixed bracket fixed to the side, and a first internal gear is provided in parallel to a movable arm fixed to the seat back side, and the numbers of teeth of the first and second internal gears are different. On the other hand, a planetary gear is provided that revolves while rotating with the rotation of the sun gear, and the planetary gear is provided with a first gear part and a second gear part that mesh with the first and second internal gears, respectively, It is characterized in that the planetary gear is movable in conjunction with the movement of the handle shaft in the axial direction so that the first gear part of the planetary gear comes off from the first internal gear and the movable arm is in a free restraint released state.

[Operation] In this configuration, the sun gear is rotated by operating the handle to adjust the reclining of the seat. As the sun gear rotates, the planetary gear rotates and meshes with the first and second internal gears. In this case, since the number of teeth of the first and second internal gears is different, the first and second internal gears are rotated by the difference in the number of teeth during the revolution of the planetary gear.
Relative rotation occurs in the second internal gear, and the movable arm can rotate. Thereafter, by continuing to operate the handle, the desired amount of rotation of the movable arm can be obtained.

Next, when the handle shaft is moved in the axial direction, the first gear portion of the planetary gear is disengaged from the first internal gear, and the movable arm becomes free and released from restraint, allowing free rotation. Further, by returning the handle shaft to its original position, the first gear portion of the planetary gear meshes with the first internal gear, and the movable arm is restrained by the speed reduction mechanism.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 4.

In the figure, 1 indicates a fixed bracket fixed to the seat cushion 3, and 5 indicates a movable arm fixed to the seat bag 7. The fixed bracket 1 and the movable arm 5 rotate around a handle shaft 13 having a handle 11. It is now possible to move.

A sun gear 15 is integrally formed on the handle shaft 13, and a support pin 19 protruding from the fixing bracket 1 is inserted into the shaft hole 17, so that the handle shaft can be rotated within the range of play α of the shaft hole 17. 1
3 movements (in the direction of the arrow in FIG. 1) are possible.

On the other hand, a first internal gear 21 is integrally mounted and supported on the movable arm 5 by a connecting pin 23.
Further, a second internal gear 25 is integrally mounted and supported on the fixed bracket 1 by a connecting pin 27, and a second internal gear 25 is integrally supported by the fixed bracket 1.
The internal gear 21 has, for example, two fewer teeth than the second internal gear 25 .

The first and second internal gears 21 and 25 are arranged in parallel, and the rising flange portion 21a formed on the first internal gear 21 is in rotatable contact with the second internal gear 25, and The support plate 29 fastened together with the gear 25 provides support in the axial direction (the first
Movement in the horizontal direction (in the figure) is restricted.

The first and second internal gears 21 and 25 are fitted with a movable arm in which the first gear part 31a and the second gear part 31b of the three planetary gears 31, which revolve while rotating with the rotation of the sun gear 15, mesh with each other. 5 is in a restrained state. The number of teeth of the first gear part 31a and the number of teeth of the second gear part 31b of the planetary gear 31 are such that the second gear part 31b has one more tooth, and the outer shape is the same as that of the second gear part 31b.
The gear portion 31b side has a larger diameter, and the second gear portion 31b meshes with the sun gear 15 at the same time as the second internal gear 25, and the first and second internal gears 2
1 and 25, the planetary gear 31, and the sun gear 15 form a speed reduction mechanism.

Both ends of the gear shaft 33, which rotatably supports each of the planetary gears 31, are supported by a pair of rotary plates 35, 35, which are rotatably fitted into the handle shaft 13. The first gear part 31a and the second gear part 31b of the planetary gear 31 are always operated by the biasing spring 37 interposed between the rotating plate 35 and the fixed bracket 1.
1 and 25, and is biased to a position where they engage with each other. The second gear part 31b of the planetary gear 31 is in a state where the first gear part 31a is disengaged from the first internal gear 21 when the gear 31 moves, and even when the movable arm 5 is in a free restraint release state, the second internal gear remains in the second internal gear position. The width is set to be wide enough to maintain the meshing state with 25.

In order to adjust the rotation of the movable arm 5 in the reclining seat device configured in this way,
The handle 11 is pressed against the biasing force of the biasing spring 37 (in the direction of the arrow in FIG. 1) to move the planetary gear 31 and remove the first gear portion 31a from the first internal gear 21.
As a result, the movable arm 5 becomes free and released from restraint, and by quickly rotating the arm 5 to a desired position, the reclining angle can be adjusted to a large extent. When the handle 11 is released at this adjustment position, the planetary gear 31 returns and the first gear portion 31a meshes with the first internal gear 21 again, so that the movable arm 5 is restrained by the deceleration mechanism.

Next, the handle 11 is rotated to the right or left to rotate the sun gear 15. The rotation of the sun gear 15 causes the planetary gears 31 to revolve while rotating. The first gear part 31a and the second gear part 31b of the planetary gear 31 at this time
The first and second internal gears 21 and 25 that mesh with each other undergo relative rotation due to the difference in the number of teeth, and the movable arm 5 rotates by the amount of relative rotation. Below, handle 1
By continuing one rotation, a predetermined amount of rotation of the movable arm 5 can be obtained. The rotation of the movable arm 5 is decelerated by a deceleration mechanism consisting of a sun gear 15 and a planetary gear 31 that revolves around the sun gear 15 while rotating on its own axis, so that the reclining angle can be finely adjusted to a small degree. Become. This provides the optimum driving position.

[Effects of the Invention] As explained above, according to the reclining seat device of the present invention, the amount of rotation of the movable arm can be finely adjusted by the reduction mechanism using the sun gear, the planetary gear, and the internal gear. This allows you to obtain the optimal driving position. Further, since the movable arm can be freely released from restraint, it is possible to set the movable arm to a full flat state with a large reclining angle, or to quickly return to the original position.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken along the line shown in Fig. 3 of the reclining seat device of the present invention, Fig. 2 is an operation diagram showing the movable arm in a free restraint release state, Fig. 3 is a side view of the same, and Fig. 4 is FIG. 2 is a side view of a seat implementing the present invention. Explanation of main drawing symbols, 1... Fixed bracket, 3... Seat cushion, 5... Movable arm, 7... Seat back, 11... Handle, 1
3...Handle shaft, 15...Sun gear, 21...
First internal gear, 25... Second internal gear, 31...
Planetary gear, 31a...Same first gear section, 31b
...Second gear section same as above.

Claims (1)

[Claims] 1. A sun gear is provided on a handle shaft that has a handle on one side and is movable and rotatable in the axial direction, and a second gear is attached to a fixed bracket fixed to the seat cushion side with the handle shaft as the center of rotation.
The first internal gears are provided in parallel to the movable arm fixed to the seat back side, and the numbers of teeth of the first and second internal gears are different,
A planetary gear is provided that revolves while rotating with the rotation of the sun gear, and the planetary gear is provided with a first gear part and a second gear part that mesh with the first and second internal gears, respectively, and the planetary gear is In conjunction with the movement of the handle shaft in the axial direction, the first gear portion of the planetary gear shifts to the first
A reclining seat device characterized by being movable so that the movable arm comes off the internal gear and becomes free and released from restraint.