JPS6226008A - Reclining apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 A reclining device that adjusts the inclination angle of a seat back is attached to a seat of an automobile or the like 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 is formed on the eccentric contour 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, a toothed annular plate is rolled around the toothed disk, At this time, the inclination angle of the seat back is adjusted by rotating the toothed annular plate relative to the toothed disk by the ratio of the number of teeth due to the difference in the number of teeth.

However, in this reclining device, the amount of change in the angle of the seat back per rotation of the operating member is small, so the operating member must be rotated a considerable number of times in order to adjust to the desired tilt position. is complicated,
In addition, if strong vibrations are applied, the meshing points between the toothed annular plate and the toothed disc will shift due to the vibrations, and the inclination of the seatback will change unexpectedly, making it necessary to readjust it while driving. Furthermore, it is difficult to operate and make adjustments when the seat is seated, i.e., when a load is applied to the seat back. Therefore, first make adjustments by operating the operating members with your back away from the seat back. ,
There were many inconveniences, such as having to check the inclination angle by placing your back against it after the operation was completed, and it took a lot of time to align the 11m.

For this reason, in passenger cars, buses, etc. where reclining adjustments are frequently made, it is recommended to release the lock using the operating member, press the seatback backwards with your back to tilt it significantly, and lock it again after setting the seat back to the desired inclination. A so-called quick-turn type reclining device is widely used. That is, this reclining device is
Continuous engagement teeth are formed on a plate that rotates together with the seat back, a locking member is arranged corresponding to the engagement teeth, and the locking member is engaged with and disengaged from the engagement teeth by an operating member. This allows the inclination of the seat back to be adjusted.

[Problem that the invention seeks to solve]

However, this quick-turn type reclining device is locked by engagement between the engaging teeth and the locking member, so it is not possible to make minute angle adjustments below the pitch angle of the engaging teeth. This is done in a stepwise manner, making it impossible to completely 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 making it possible to perform stepless fine adjustment in addition to this stepwise adjustment, it is possible to quickly and accurately adjust the inclination angle desired by the seated person. The purpose is to provide a reclining device that can

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has a return spring set shaft that is fixed through and fixed to a base plate as a fixing member fixed to the rear end of one side of the seat cushion, and an engagement part as an engagement part on the lower peripheral edge. A second rotary plate is pivotally supported in which joint teeth are formed in succession, and a reclining hinge center shaft is concentrically and rotatably connected to the set shaft. A first rotary plate is pivotally supported so as to be rotatable in the front-rear direction, and a stopper arm that is engaged with the engaging teeth is engaged with the base bracket in correspondence with the engaging teeth of the second rotating plate. A locking mechanism having an operation lever that rotates to engage and disengage from the mating teeth is provided, and the first rotation plate is connected to the second rotation plate between the first rotation plate and the second rotation plate. For example, the fine adjustment mechanism includes a first and a second rotation plate.
It consists of long holes formed opposite to each other so as to intersect with each other in the rotation plate, an adjustment bin that is engaged across the long holes, and a cam plate that moves and operates the adjustment bin. The cam plate is rotated by the center axis of the hinge.

[Effect]

The measures described above operate as follows.

First, rotate the operating lever to connect the stopper arm and the second
When the rotation plate is disengaged from the engagement tooth, the first rotation plate connected to the second rotation plate via the adjustment bin of the fine adjustment mechanism can rotate together with the second rotation plate. Therefore, the inclination angle of the seat back can be adjusted.

Then, by engaging the stopper arm with the engagement teeth near the desired tilted position, the first rotation plate and the second rotation plate are rotated.
The pivot plate of is locked so that the seat back is fixed in its tilted position.

After largely adjusting the inclination of the seat back in this way, by rotating the cam plate of the fine adjustment mechanism, the adjustment pin is moved in communication with the elongated holes of the first and second rotation plates, At this time, since the elongated holes are formed to intersect with each other, the phase thereof changes, so that the first rotating plate rotates by a slight angle relative to the second rotating plate in the locked state. Therefore, the inclination angle of the seat back can be finely adjusted in a stepless manner.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

In the figure, (1) indicates a seat of a vehicle, (2) a seat cushion, and (3) a seat back.
) is provided with a reclining device W (4) of the present invention on one side of the connecting portion between the seat cushion (2) and the seat back (3).

0φ is the base bracket of this reclining device (4), and Qφ is the base bracket of this reclining device (4).
) is fixed to the rear end of the - side part. A return spring set shaft (12) is fixed to the upper part of the base bracket αω by penetrating its head to the outer surface, and a circular recess (12a) is formed in the head. The head of this set shaft (12) has engaging teeth (1
A second rotating plate (13) serving as a reclining gear in which a reclining gear 3a) is formed is slidably fitted in a stepped shaft hole (14) at the center of the second rotating plate (13).
) are circular long holes (15a) (15b) formed in the base bracket Ql with the set shaft (12) as the center.
) are inserted into the hold pins (16a) (16b
) is rotatably supported with respect to the base bracket α1.

Further, a hinge center shaft (17) is rotatably connected concentrically to the head side of the set shaft (12) in a circular recess (12a), and a cam plate (18) is connected to the hinge center shaft (17) in the rotational direction. A first rotary plate (19) connected to the cam plate (18) and fixed to the seat back (3) on the outer surface side of the cam plate (18) is pivotally supported so as to be freely rotatable in the front-rear direction.

In addition, a return spring (20) is wound around the center shaft (12) inside the base bracket Oω, and its inner end (20a) is a cut groove n2b formed in the inner end of the set shaft (12). The outer end portion (20b) is engaged with an engaging portion (13b) formed by bending the free end portion of the second rotating plate (13) inward, and the return spring ( 20) by the second rotating plate (1
3) is always urged forward to rotate.

And the engagement teeth (13) of this second rotation plate (13)
Corresponding to a), a locking mechanism A is provided at the lower part of the base bracket αφ.

This locking mechanism A is constructed as follows.

A stopper arm (22) is rotatably supported in the vertical direction on a shaft (21) protruding from the lower rear end of the outer surface of the base bracket αψ.
) has a second rotating play on its upper edge) (13)
A lock tooth (22a) is formed corresponding to the engagement tooth (13a) of the lock tooth (22a), and a release pin (23a) is formed on the lower outer surface of the lock tooth (22a).
) is provided protrudingly.

In addition, an operating lever (25) is rotatably supported in the vertical direction by a hinge center shaft (17) corresponding to the outer surface of the stopper arm (22), and the operating lever (25) is There is a long hole for opening and closing the stopper arm (25
a) is formed, and the release pin (23) of the above-mentioned stopper arm (22) is engaged with this elongated hole (25a), and the front end protrudes forward to form a handle (25b).
) is attached.

By rotating this operation lever (25) in the vertical direction, the release pin (23) is moved by the displacement of the elongated hole (25a), so that the stopper arm (
22) is the engagement tooth (13a) of the second rotation plate (13).
) is rotated so that it is bonded against.

In addition, the operation lever (25) is always connected to the stopper arm (2
2) is rotationally biased by a tension spring or the like so as to rotate toward the second rotation plate (13), and the second rotation plate (13) is in a locked state.

A hold bracket (26) with a hinge center shaft is disposed on the outer surface of the operating lever (25), and is fixed to the base bracket θ0) by a shaft (21) and a rivet shaft (27), and the upper shaft hole (26a) is fixed to the base bracket θ0). ) while the hinge center axis (
The front half of 17) is protruded, and an elastic ring (28) made of rubber or the like is fitted into this protrusion, and is tightened with an E-ring (30) via a restraining washer (29) to secure the outer surface of the hold bracket (26). The hinge center shaft (27) is brought into pressure contact with the hinge center shaft (27) to act as a brake.

Further, an adjustment handle (31) of a stepless fine adjustment mechanism, which will be described later, is attached to the tip of the hinge center shaft (17).

A fine adjustment mechanism B is provided between the first rotating plate (19) and the second rotating plate (13), with the cam & (18) as the center and configured as follows. .

That is, the first rotating brake (19) and the second rotating plate (13) each have a long hole (
32) and (33) are bored opposite each other so as to intersect with each other, and in the same long holes (32) and (33), an adjustment bin (34) is inserted into an eccentric cam hole formed in the cam plate (18). (1
The adjustment pin (34) is connected to the elongated hole (32) by rotation of the cam plate (18).
The tenth rotation plate (19) is rotated relative to the second rotation plate (13) by moving the tenth rotation plate (19) from one end of (33) toward the other end. The rotation range of the first rotation plate (19), that is, the rotation angle is determined by the inclination and length of the long holes (32) and (33). 33), for example, as shown in FIG. 7, the adjustment bins (34) are moved from one end to the other, so that the tenth rotation plate (19) changes to the second rotation plate (19). Its inclination and length are set so that the angle at which it is rotated with respect to the second rotary brake (13) is equal to the pitch angle a of the engaging teeth (13a) of the second rotary brake (13).

In addition, the eccentric cam hole (18a) of the cam & (18) is opened by the adjustment bin (34) when the cam plate (18) is approximately rotated.
is formed so that it can be moved from one end of the elongated holes (32) and (33) to the other end. This cam plate (18)
is rotated by rotating the hinge center shaft (17) with the adjustment handle (31).

Next, the operation of the apparatus of this example configured as described above will be explained.

Now, in the reclining device (4), the lock tooth (22a) of the stopper arm (22) is in the second position as shown in FIG.
The adjustment pin (34) is engaged with the engagement teeth (13a) of the rotation plate (13) of the cam plate (13), and is in a locked state.
The eccentric cam hole (18a) of 18) is located at one end, that is, the outermost end, and is engaged with the outermost ends of the same elongated holes (32) and (33), and in this state, the seat The +11 seat back (3) is in the neutral position.

From this state, first rotate the operating lever (25) of the lock mechanism A so as to pull it upward, rotate the stopper arm (22), and engage the lock teeth (22a and the second rotation plate (13)). When the second rotating plate (13) is disengaged from the matching tooth (13a), the lock is released and the second rotating plate (13) becomes freely rotatable in the front and back direction (see Fig. 5), and the return spring (13) acting on it is released. It is rotated forward by the biasing force of 20).

Together with this, the tenth rotation plate (19) connected via the adjustment bin (34) of the fine adjustment mechanism B is also rotated forward.

When the 10th rotating brake (19), that is, the seat back (3) is rotated forward, when you press the seat back (3) backward with your back, the first and second rotating plates (19) and (Step 3) are return springs (
20) is rotated backward while resisting the biasing force of the lever (20), and by pressing down the operating lever (25) at its original position near an arbitrary tilted position, that is, by releasing the lifting of the operating lever (25). The stopper arm (22) is rotated downward by the biasing force applied to the second rotating brake 1-.
(13) The lock teeth (
22a) is again engaged with the engagement tooth (13a) of the second rotation plate (13) and the first rotation plate (19)
) is locked via the second pivot plate (13),
The seat back (3) is thus fixed in its inclined position.

On the other hand, in this tilted state or the state shown in FIG.
The cam plate (I8) is rotated against the frictional force of the elastic transport body (28), thereby rotating the cam plate (I8). Then, due to the continuous change of the cam hole (18a) of this cam t&(1B), the adjustment pin (34) is moved from the inner end to the outer end along the elongated holes (32) and (33). At this time, the elongated holes (32) and (33) are formed to intersect with each other, so that the phase changes, and the tenth rotating plate (19) is different from the second rotating plate (13). is rotated slightly backward. That is, the second rotation plate (1
3) is locked so that it cannot be rotated, so the adjustment bin (3)
4) is a state in which the cam plate (18) is guided by the elongated hole (33) of the second rotating plate (13) due to continuous changes in the cam hole (18a) due to the rotation of the cam plate (18). It is supposed to move from the inner end to the outer end by approximately - rotation, and at this time, the adjustment bin (34) continuously moves the rear edge of the elongated hole (32) of the first rotation plate (19). Therefore, the first rotating plate (19) is rotated to the forward position relative to the second rotating plate (13), and therefore, the inclination of the seat back (3) is reduced within this rotation range. Fine adjustment of the angle is performed.

) At this time, as mentioned above, the first rotating plate (1
9) is rotated with respect to the second rotary play 1-(13) by adjusting the angle at which the second rotary play 1-(13) is rotated by the engaging tooth (1) of the second rotary play 1-(13).
If the pitch angle a is set equal to the pitch angle a of 6), the 10th rotation play (19) will steplessly move between the teeth of the engagement teeth (13a) of the 20th rotation plate (13). Therefore, it is possible to make fine adjustments of 2 degrees or less, which is normally set as the pitch angle of the engaging teeth (13a).

In this way, the reclining device (4) of this example has a 2° Large angle adjustment in stages and adjustment bins (3
4) Two-stage fine adjustment of 2 degrees or less between the teeth of the engaging teeth (13a) is possible by movement in the long holes (32) and (33), so the seated person can First, operate the operating lever (25) to set the seat back (3) near the desired inclination position, and then operate the adjustment handle (31) to make fine adjustments.
This means that the inclination of the seat can be adjusted steplessly over the entire reclining adjustment range.

In addition, this fine adjustment operation involves moving the adjustment bin (34) along the elongated holes (32) and (33) to the cam hole (3) of the cam plate (18).
This is done by moving little by little by continuous changes in the holes (32) and (3).
3) is formed with a slight inclination, and since the return spring (20) is attached to the 20th rotation plate (13) side which is in the locked state during this fine adjustment, its biasing force is equal to that of the first rotation. It does not act on the dynamic plate (19),
Therefore, the adjustment handle (31) that rotates the cam plate (18)
) is easy to operate, even when seated.

Furthermore, in this example, the amount of rotation of the cam plate (18) during fine adjustment is approximately one rotation because the cam hole (18a) is formed over approximately one circumference, and therefore the adjustment handle (31
) requires only a small amount of operation, making it ideal for fine adjustment.

In addition, even if a strong motion is applied to the entire reclining device (4), the cam plate (18) will not move due to the elastic ring body (28) coming into pressure contact between the hinge center shaft (17) and the hold bracket (26). Since rotation is prevented by frictional resistance, the position of the adjusting bin (34) is not moved, and therefore the first rotating plate (19)! The inclination of the p-seat back (3) will not change unexpectedly.

In addition, in the configuration of this example, the first and 20th rotation plates (
By changing the inclination and length of the long holes (32) and (33) in (19) and (13), the adjustment bin (34)
The first rotation plate (13) relative to the second rotation plate (13) due to the movement of
Since the rotation angle of the second rotation plate (13) (0 rotation play) (19) can be changed, the engagement tooth (13) of the second rotation plate (13)
Even if the module a) is made larger, the tenth rotation plate (19) and the seat back (3) can be set at any desired angle. By making the module large in this way, the strength of the engaging teeth (13a) is increased, so the thickness of the rotating plate (13) of the writing brush 2 can be made thinner, so that the overall thickness of the device increases. It can be made thinner and lighter.

〔Effect of the invention〕

As described above, the reclining device of the present invention can adjust the inclination angle of a seat puncture through a two-step operation of stepwise large adjustment and stepless fine adjustment, so that the seated person can recline the seatback. The desired inclination angle can be set quickly and accurately over almost the entire adjustment range, and the stepped adjustment mechanism and the stepless hollow mechanism are configured to operate on one axis. It has the following effects: it is simple and can be miniaturized, and its operability is significantly improved.

[Brief explanation of drawings]

Fig. 1 is a partially omitted side view of the reclining device of the present invention, Fig. 2 is a central vertical sectional view of the device, Fig. 3 is an exploded perspective view of the device, and Fig. 4 is a partially omitted side view of the reclining device of the present invention. A perspective view of a commonly used vehicle seat, FIGS. 5 and 6 are explanatory diagrams of the operation of the reclining device of the present invention, and FIG. 7 shows the rotation angle of the first rotation plate and the second rotation angle during fine adjustment. It is an explanatory view of the relationship of engagement teeth of a rotation plate. In the figure, (2) is a seat cushion, (3) is a seat back, α is a base bracket as a fixing member, (12)
and (17) is the set axis and hinge center axis as the axis,
(13) is a second rotation plate, (13a) is an engagement tooth as an engagement portion, (19) is a first rotation plate, A is a lock mechanism, and B is a fine adjustment mechanism. 921, 2I,

Claims (1)

[Claims] A first rotary plate connected to the seat back is rotatably supported in the front-rear direction on a fixed member on the seat cushion side, and a second rotary plate coaxially with the first rotary plate has a continuous engagement portion. A locking mechanism is disposed on the fixed member side to be engaged with an engaging portion of the second rotating plate and lock the second rotating plate so as not to rotate. At the same time, a fine adjustment mechanism is provided between the first rotating plate and the second rotating plate to rotate the first rotating plate by a predetermined angle with respect to the second rotating plate. A reclining device characterized in that the fine adjustment mechanism is operated coaxially with the first and second rotating plates.