JPH0527403B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reclining device provided in a vehicle seat or the like.

[Conventional technology]

2. Description of the Related Art Seats in automobiles and the like are equipped with reclining devices that adjust the inclination angle of the seat back so that a seated person can take a desired sitting posture.

Conventionally, this reclining device has been disclosed, for example, in Japanese Patent Publication No. 49-48691. That is, in this reclining device, a toothed circular plate with teeth cut on the inside is attached to the seat back side, and a toothed circular plate with teeth cut on the outside is attached to the seat cushion side, and this toothed circular plate is attached to the seat cushion side. The number of teeth on the plate is formed to be one less than the number of teeth on the toothed annular plate, and a part of this toothed disk meshes with the toothed annular plate, and the toothed annular plate engages with the eccentric ring portion of the shaft with an eccentric wheel. , a toothed disk is rotatably supported by each shaft, and by rotating the eccentric shaft with an operating member, the toothed annular plate rolls around the toothed disk. At this time, due to the difference in the number of teeth, the toothed annular plate is rotated relative to the toothed disk by a ratio of the number of teeth, so that the inclination angle of the seat back is adjusted.

However, although this reclining device can be adjusted steplessly, the amount of change in the angle of the seat back per rotation of the operating member is small, so it is necessary to rotate the operating member a considerable number of times in order to adjust to the desired tilt position. However, it has disadvantages such as complicated operation and time-consuming adjustment.

For this reason, in passenger cars, buses, etc., where the reclining adjustment is complicated, it is necessary to release the lock using the operating member, press the seat back backwards with your back to tilt it significantly, and lock it again after setting the desired inclination. A so-called quick turn type reclining device is widely used. That is, in this reclining device, continuous engagement teeth are formed on a plate that rotates together with the seat back, a locking member is disposed corresponding to the engagement teeth, and the locking member is engaged by an operating member. The inclination of the seat back is adjusted by engaging and disengaging the teeth.

[Problem that the invention seeks to solve]

However, in this quick-turn type reclining device, since locking is performed by engagement between the engaging teeth and the locking member, it is not possible to make minute angle adjustments below the pitch angle of the engaging teeth. Adjustment is carried out in stages, and as a result, it is not possible to perfectly match the seat back to the desired inclination angle of the occupant.

The present invention has been made in view of this point, and by enabling stepless fine adjustment in addition to this stepwise adjustment, the inclination angle can be quickly and accurately adjusted to the desired inclination angle of the seated person. The present invention provides a reclining device that can be used.

[Means for solving problems]

In order to solve the above problems, the present invention has a base plate attached to a support member on the cushion frame side and a hinge arm attached to the seat back side, and a sector gear formed on either the plate or the arm. In the reclining device, a lock plate is pivotally connected to the other side, and the plate is released by a lever handle.The base plate is rotatably attached to the support member, and the base plate and the support member are connected to each other. An eccentric cam is pivotally attached to one of the two, an engagement hole for the eccentric cam is formed in the other, and the eccentric cam is rotated within the engagement hole by an operating device with a brake mechanism.

[Effect]

With the above configuration, when the eccentric cam is eccentrically rotated in the engagement hole by the operating device with a brake mechanism, the base plate is rotated within the range of the eccentric amount of the eccentric cam with respect to the support member, and this rotation The inclination angle of the seat back supported by the hinge arm is finely adjusted in a stepless manner.

Therefore, in adjusting the inclination angle of the seat back, stepwise large adjustment by the meshing lock between the sector gear and the lock plate and stepless adjustment within a predetermined range based on the stepwise adjustment position, that is, fine adjustment can be performed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

First, in FIGS. 1 and 2 showing the first embodiment, 1 indicates a reclining device, and this device 1
Similar to the conventional quick-turn type reclining device described above, a hinge arm 3 attached to the seat back side is hinged to a base bracket 2 attached to the seat cushion side by a shaft 4, and a shaft 4 is connected to the base bracket 2 attached to the seat cushion side. A sector gear 5 is formed, and this sector gear 5
A lock plate 6 having teeth 6a that mesh with the base bracket 2 is pivotally supported by a pin 7, and is engaged with a lever arm 8 pivotally supported by the shaft 4 via a pin 9, and the hinge arm 3 has a spring (see FIG. (not shown).
Then, by rotating the lever handle 8, the lock plate 6 is rotated to release the lock from the hinge arm 3. In this state, the hinge arm 3 is rotated to a desired angle and locked by the lock plate 6 again, and the seat back is released. can be set at a desired angle with respect to the seat cushion.

However, the angle change due to the engagement of the hinge arm 3 with the lock plate 6 is performed step by step, tooth by tooth of the sector gear 5, and therefore cannot be accurately set to a desired angle.

Therefore, in the present invention, fine adjustments can be made in a stepless manner even in a reclining device that changes the angle step by step.

That is, in this example, the base bracket 2 of the reclining device 1 configured as described above is pivoted to the cushion frame 10 so as to be rotatable in the front and back direction by a pivot pin 11, and a portion remote from this pivot point is attached to the cushion frame 10. A long engagement hole 12 is provided in the direction of the shaft attachment point,
On the other hand, an eccentric cam 13 is pivotally supported on the cushion frame 10 in correspondence with the engagement hole 12, and this cam is inserted into and engaged with the engagement hole.

The eccentric cam 13 is pivoted to the cushion frame 10 by inserting one end of the cam shaft 14 into a bearing hole 15 formed in the cushion frame 10, and inserting the other end into the cushion frame 10 so as to sandwich the base bracket 2. This is accomplished by pivoting on a fixed bracket 16. and camshaft 1
An arm 17 is connected to the inner end of the cushion frame 10, that is, an end protruding inwardly of the cushion frame 10, and a rack arm 18 is connected to the free end of the arm 13 and extends along the inner surface of the cushion frame 10. An operating device 19 with a brake mechanism is attached to the approximately middle portion of the cushion frame 10, and a pinion gear 20 of this movable portion is connected to the rack 1 of the rack arm 18.
It is meshed with 8a. The operating device 19 has a dial 21 attached to its operating shaft 19a, and is rotated by the dial 21.

The reclining device of this example configured as described above rotates the operating device 19 while the hinge arm 3 is locked to the base bracket 2 by the lock plate 6, that is, the hinge arm 3 and the base bracket 2 are integrated. When operated, the pinion gear 20 is rotated to move the rack arm 18 forward or backward, and the movement of the rack arm 18 causes the camshaft 14 to rotate via the arm 17. The eccentric cam 13 is integrated with the rotation of the camshaft 14.
is rotated eccentrically within the engagement hole 12 of the base bracket 2 and presses the upper and lower inner edges of the engagement hole 12. Therefore, the base bracket 2 is attached to the cushion frame 10 by the pivot point of the pivot pin 11. It is rotated to the rear or front using the fulcrum as the fulcrum.

At this time, the hinge arm 3 is also rotated together with the base bracket 2, so that the angle of inclination of the seat bag connected to the hinge arm 3 with respect to the cushion frame 10, that is, the seat cushion can be varied.

The range in which the inclination angle of the seat back can be varied is within the range in which the base bracket 2 is rotated by the eccentric cam 13, but the hinge arm 3 is adjusted in steps for each pitch angle of the sector gear 5 relative to the base bracket 2. Since the angle is changed, by setting the rotation range angle of the eccentric cam 13 of the base bracket 2 to be approximately equal to the pitch angle of the sector gear 5, the angle of the hinge arm 3 is changed relative to the base bracket 2.
If the base bracket 2 is rotated by the eccentric cam 13 while the inclination is adjusted step by step at intervals of the pitch angle of the sector gear 5, that is, the base bracket 2 is rotated by the eccentric cam 13, the adjustment is made in a stepless manner, that is, finely adjusted. can be set accurately to the desired angle.

Note that by increasing the amount of eccentricity of the eccentric cam 13, the range in which the seat back can be adjusted steplessly can be increased.

In this way, the eccentric cam 1 is controlled by the operating device 19.
3 to perform stepless adjustment, and then release the dial 21, the brake mechanism of the operating device 19 is activated and the pinion gear 20 is not rotated even if a rotational force is applied from the outside. Therefore, even if the eccentric cam 13 is subjected to rotational force from the base bracket 2, the rack arm 18 is connected to the camshaft 14 via the arm 17.
is engaged with the pinion gear 20 which is in the locked state, so it cannot be rotated, and therefore, the base bracket 2 is prevented from rotating with respect to the cushion frame 10 by the engagement of the eccentric cam 13 with the engagement hole 12, and is in a fixed state. , the seat back is fixed in the adjusted position and maintained in normal use.

If the reclining device 1 is a double-lock type in which the reclining device 1 is attached to the left and right hinge portions of the seat frame, the pinion gear 20 of the operating device 19 and correspondingly the other side of the cushion frame are A pinion gear 22 is connected by an interlocking rod 23 to a rack arm connected to the other eccentric cam.

Next, a second embodiment will be explained with reference to FIG. 3. In this embodiment, an eccentric cam is pivotally attached to the base bracket of a reclining device, and an engagement hole in which the eccentric cam is engaged is provided in the cushion frame. be.

That is, the rough adjustment mechanism of the reclining device 1 is constructed in the same manner as in the first embodiment described above, and the base bracket 2 is connected to the shaft pin 11 at one lower end thereof.
An eccentric cam 13 is pivotally supported on the inner surface of the lower other end of the base bracket 2, and an operating device 19 with a brake mechanism is provided on the outer surface of the base bracket 2 in correspondence with the eccentric cam. The camshaft 14 is connected thereto. The cushion frame 10 is provided with an engagement hole 12 which is long in the front-rear direction and corresponds to the eccentric cam 13, so that the eccentric cam 13 can be inserted and engaged therein.

Therefore, in this example, the eccentric cam 13 is directly rotated by the operating device 19, and the engagement rotation of the eccentric cam 13 with respect to the engagement hole 12 causes the base bracket 2 to be moved against the shaft pin 1 with respect to the cushion frame 10.
1 as a fulcrum, and the reclining device 1 is operated in the same manner as in the first embodiment described above to finely adjust the inclination angle of the seat back.

In addition, in this example, the reclining device 1 is mounted on the left and right hinges of the seat frame, and the cam shaft of the eccentric cam 13 is
Through a fine adjustment interlocking mechanism 27, an arm 17 spline-coupled to the inner end of the hinge arm 4 and a tubular shaft 25 fitted into a connecting shaft 24 connecting the left and right hinge arms 3 are connected via an interlocking piece 26. The eccentric cams 13 on both sides are configured to be interlocked with each other.

It should be noted that other members of the reclining device 1 are the same as those of the first embodiment described above, so the same reference numerals are given and the explanation thereof will be omitted.

Further, a third embodiment will be described with reference to FIG. 4. In this embodiment, the base bracket of the reclining device is mounted coaxially with the hinge arm to the cushion frame.

That is, the rough adjustment mechanism of the reclining device 1 is constructed in the same manner as in the first and second embodiments described above, but the base bracket 2 has a shaft boss 28 on its inner surface in the same axis direction as the shaft attachment portion of the hinge arm 3. is provided protrudingly, and this shaft boss 28 allows the cushion frame 1 to be
It is pivotally supported by a bearing hole 29 formed at 0.0.

Further, other members in this embodiment are arranged and configured in the same manner as in the second embodiment described above, so the same reference numerals are given and the explanation thereof will be omitted.

In the reclining device 1 of this example configured as described above, when the eccentric cam 13 is rotated by the operation device 19, the base bracket 2 is rotated about the shaft boss 28 as a fulcrum, and the inclination angle of the seat back can be finely adjusted. . That is, in the reclining device 1 of this example, coarse adjustment and fine adjustment are performed at the same fulcrum.

In this example, the eccentric cam 13, the engagement hole 12, and the operating device 19 may be arranged and configured in the same manner as in the first example described above.

In the second and third embodiments described above, the range of fine adjustment can be changed by changing the mounting position of the eccentric cam 13 with respect to the center of rotation of the base bracket 2.

In addition, in each of the first to third embodiments described above, the base bracket 2 of the reclining device 1 is configured to be directly pivoted to the cushion frame 10, but the present invention is not limited to this. It may be pivoted indirectly, such as by being pivoted to a fixed support member, and the configuration of other members may be modified in various ways without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, the reclining device according to the present invention is capable of performing stepped large adjustment and stepless adjustment within a predetermined range based on the adjusted position, that is, fine adjustment, in adjusting the inclination angle of the seat back. It can be adjusted steplessly over almost the entire reclining adjustment range, allowing the seat back to be quickly and accurately set to the desired inclination angle, and is configured with an eccentric cam and brake mechanism as a fine adjustment mechanism in addition to the commonly used reclining device. Since only the attached operating device is added, the degree of modification of the main body of the device is small, and therefore, the product can be standardized and costs can be reduced, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a side view of a first embodiment of the reclining device according to the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is an exploded perspective view of the second embodiment, and FIG.
FIG. 2 is an exploded perspective view of the embodiment. In the figure, 2 is a base bracket, 3 is a hinge arm, 5 is a sector gear, 6 is a lock plate, 8 is a lever handle, 10 is a cushion frame, 1
1 is a shaft pin, 12 is an engagement hole, 13 is an eccentric cam, 1
9 is an operating device with a brake mechanism.

Claims (1)

[Claims] 1. A base plate attached to the cushion frame side support member and a hinge arm attached to the seat back side are pivotally connected, and are locked by meshing with a sector gear formed on either the plate or the arm. In the reclining device, a lock plate is pivotally connected to the other, and the lock plate is unlocked by a lever handle, wherein the base plate is rotatably pivoted to the support member, and the base plate and the support member An eccentric cam is pivotally supported on one side of the eccentric cam, and an engagement hole for the eccentric cam is formed on the other side, and the eccentric cam is rotated by an operating device with a brake mechanism. A reclining device characterized in that the base plate is rotated by being rotated by an operating device to finely adjust the inclination angle of the seat back.