JPS6322908Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat reclining device, and more particularly to a seat reclining device that reclines and tilts the backrest of the seat back and forth.

As is well known, the seat reclining device is
The backrest of the seat can be tilted forward and backward to suit the physique of the sitter, or the backrest can be extended horizontally backwards or folded forward depending on the purpose of use, or it can be made more relaxing and comfortable to sit on. The backrest is tilted backwards, and the backrest is supported in the tilted position, folded position, or horizontal position.The conventional basic structure is that the lower end of the arm attached to the side of the backrest is An upper tooth forming a tooth groove is provided, a lower tooth that engages with the upper tooth is provided on a base plate attached to the seat of the seat, and the engagement of the lower tooth and the upper tooth locks the backrest at a desired tilted position. In addition, by releasing the engagement between the lower tooth and the upper tooth, the backrest can be freely rotated and reclined to the desired position. In devices that use objects to lock the backrest in a desired position, the backrest is supported by individual teeth in the tooth groove, so the structure of each tooth must be strong. On the other hand, if the pitch of each tooth becomes smaller, the structure of each tooth becomes weaker.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional technology, and to construct a clamping section in which a plurality of spherical members are arranged in a partially arc-shaped section formed at the lower end of the arm attached to the side of the backrest. A locking member having a removable locking portion between the spherical members of the holding portion is provided on a base plate attached to the seat of the seat, and the locking member is actuated by operating a reclining operating lever. In particular, it is an object of the present invention to provide a reclining device for a seat, which allows the backrest to be reclined and locked at a desired position by engaging and disengaging the locking portion between the spherical members.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.
The seat shown in FIG. 1 is a seat to which a reclining device 1 of the present invention is applied, and this reclining device 1 has a main body portion attached to the rear side of a seat portion 2 of the seat, and a body portion extending upward from the main body portion. The upper part of the extended arm 3 is integrally attached to the side of the backrest part 5 of the seat, and a reclining operation lever 14 is provided to protrude forward from the main body part. And the reclining operation lever 14
By operating the backrest part 5 upward, the backrest part 5 becomes freely rotatable in the front and back direction with the lower end as a base point, and can be reclined to a desired position.By returning the reclining control lever 14 to its original position, the backrest part 5 can be moved back and forth. This allows the backrest portion 5 to be locked.

FIG. 2 is a diagram showing the internal structure of the reclining device 1 shown in FIG. 1. As shown in FIG. , the seat 2 shown in FIG.
It is rotatably supported by a rotation shaft 7 near the upper center of a base plate 6 that is integrally attached to the rear side. A partially arcuate portion 3a is formed at the lower end of the arm 3, and this partially arcuate portion 3a
Support portions 3b and 3c are provided at both ends of the arm 3 so that a portion of the arm 3 projects downward. A holding part 9 formed by arranging a plurality of spherical members 8 in a row is formed in the partially arcuate part 3a formed between the supporting parts 3b and 3c.
Between the spherical members 8 constituting the clamping portion 9, a triangular-shaped locking portion 10a integrally formed at the upper end of the locking member 10 has its tip inserted into the locking portion 10a.
The locking member 10 has one end rotatably supported by a pin 13 provided near the other end of the reclining locking auxiliary member 12, which is rotatably supported on the base plate 6 by a support shaft 11. The other end is attached to a support shaft 11 supporting the reclining locking assisting member 12 so that a half-open elongated hole 10b is loosely fitted. A recess 12a is provided at the lower end of the other end of the reclining locking auxiliary member 12.
is formed, and the reclining control lever 1 is located here.
A push pin 15 provided on one arm 14a of the arm 4 is in contact with the push pin 15. The reclining operation lever 14 is
The central portion bent in a dogleg shape is rotatably supported by the base plate 6 by a support shaft 16, and is operated by operating the other arm 14b extending to the left.

Note that the reclining locking auxiliary member 12
is urged to rotate counterclockwise about the support shaft 11 by a biasing means such as a spring (not shown), and the reclining operation lever 14 is similarly supported by a biasing means (not shown) such as a spring. It is urged to rotate counterclockwise about the shaft 16. As a result, the push pin 15 provided on the one arm 14a of the operating lever 14 moves to the reclining locking auxiliary member 12.
The reclining locking auxiliary member 12 is pushed upward against the spring (not shown), and the locking portion 10a of the locking member 10 provided on the reclining locking auxiliary member 12 is pressed against the reclining locking auxiliary member 12. is engaged with the holding part 9. Further, the locking member 10 is attached to the reclining locking auxiliary member 12 by a pin 13 and a long hole 10b, and has a play that allows it to move within the range where the long hole 10b comes into contact with the support shaft 11. This allows the locking portion 10a to easily engage with the holding portion 9.

A plurality of spherical members 8 forming the holding portion 9
is disposed on the partially arcuate portion 3a of the arm 3, and in order to form the holding portion 9, a support rail 3d is provided below the partially arcuate portion 3a, and the spherical member 8 is placed on this support rail 3d. The spherical member 8 is supported movably. In this case, there is a slight gap between the spherical members 8 arranged in one row, and when the locking part 10a of the locking member 10 is inserted between the spherical members 8 as shown in FIG. , the above-mentioned gaps are filled so that they are arranged almost tightly.

When the locking portion 10a is inserted between the spherical members 8 as shown in FIG.
0 is pushed upward by the push pin 15 of the reclining operation lever 14 via the reclining locking auxiliary member 12, so the locking portion 10a is inserted between the spherical members 8 and then pressed. Further, as a result of being pressurized in this manner, the locking portion 10a is locked in a state where it is pressed from both sides by the spherical member 8. The locking portion 10a is pressurized and locked between the spherical members 8, so that the arm 3, which was rotatable about the rotation shaft 7, is locked at that position.

The reclining device of the present invention is configured as described above. Next, its effect will be explained.

In FIG. 2, the locking portion 10a engages with the clamping portion 9 to lock the arm 3 and fix the backrest portion in that position. In order to make the backrest rotatable and recline to a desired position, the reclining control lever 14 is moved upward as shown by the arrow 18 in FIG. Then, the reclining operation lever 14 is rotated clockwise about its support shaft 16. As a result, the reclining locking auxiliary member 12, which had been pushed upward by the push pin 15 provided on the arm 14a of the reclining operating lever 14, is moved by the aforementioned biasing means such as a spring (not shown). rotates counterclockwise around the support shaft 11. The locking portion 10a of the locking member 10 provided on the reclining locking auxiliary member 12 is disengaged from the holding portion 9 made of a plurality of spherical members 8, and the arm 3 is moved to the rotation shaft 7. Make it rotatable. Therefore, as a result, arm 3
The backrest, which is integrally attached to the seat, can be reclined and tilted to a desired position. As is well known, the backrest portion is generally urged to rotate forward about the rotation axis 7 by a biasing means such as a spring (not shown), and as described above, the backrest portion is urged to rotate forward about the rotation axis 7, and as described above, the backrest portion is urged to rotate forward about the rotation axis 7. When the backrest is disengaged from the part 9, the backrest rotates so as to fall forward, so the recliner can hold the backrest or support it with his or her back and move the backrest to the desired position. It rotates the part.

To release the lock in this way, rotate the backrest to a desired position, and lock/fix the backrest at this position, return the reclining control lever 14 operated as described above to its original position ( All you have to do is return it to the position shown in FIG. That is, arrow 18 (second
When the reclining operating lever 14 that has been operated upward is stopped and released as shown in FIG. Return to the state shown in the figure. As a result, the reclining locking auxiliary member 12 is pushed upward by the push pin 15 and rotates clockwise around the support shaft 11, and the locking portion 10a of the locking member 10 forms the clamping portion 9. The arm 3 is locked in that position, and the backrest is fixed in its desired reclined position.

As explained above, according to the present invention, a holding part made of a plurality of spherical members is formed in the partially arc-shaped part formed at the lower end of the arm, and the locking part of the lock member is inserted between the spherical members. Since the arm is locked by applying pressure, the structure is strong. In particular, the load applied to the spherical member holding the locking portion when the locking portion is pressurized is supported by the support portions 3b and 3c formed on both sides of the partially arcuate portion.

Furthermore, according to this invention, a spherical member is used in the partially arcuate portion as the holding portion, and since the spherical member has a spherical shape, the locking member can be easily and smoothly moved without using a large force. A locking part can be inserted.

In the above embodiment, as shown in FIG. 2, when the locking part 10a is inserted between the spherical members 8, even though the spherical members 8 are tightly packed without any gaps, There may be a slight gap, that is, a play, and in this case, the backrest portion can be swung within the range of the play. Furthermore, although the spherical members are arranged in one row in the above embodiment, the present invention is not limited to this.
They may be arranged in rows, or they may be placed freely with appropriate gaps, rather than in rows.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a seat to which a reclining device of the present invention is applied, and FIG. 2 is a front view showing the internal structure of a seat reclining device according to an embodiment of the present invention. 1... reclining device, 2... seat, 3...
... Arm, 5 ... Backrest portion, 6 ... Base plate, 8 ... Spherical member, 9 ... Holding part, 10 ...
Lock member, 10a...locking part.

Claims (1)

[Claim for Utility Model Registration] A base plate 6 attached to the rear side of the seat 2 of the seat, a lower end rotatably attached to the base plate 6, and an upper end attached to the backrest 5 of the seat. A seat reclining device 1 having an arm 3 and reclining and tilting a backrest 5 rotatably back and forth around its lower end.
The operating lever 1 has a holding part 9 having a plurality of spherical members 8 disposed within a partially arcuate part 3a formed at the lower end of the arm 3, and a triangular locking part 10a.
4, the lock member 10 inserts and removes the locking portion 10a between the plurality of spherical members 8 of the holding portion 9;
A seat reclining device characterized by comprising: and.