JPH0263004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat reclining device, and particularly to a rotation range regulating portion of a rotation arm provided on a base portion to which the rotation arm is pivotally attached.

Conventionally, the seat reclining device D is
As shown in FIGS. 1 and 2, a base portion 1 attached to the seat cushion portion side, and this base portion 1
A rotating arm 3 pivotally connected to the rotating arm 3 by a shaft 2, a latch mechanism (not shown) for adjusting the rotating angle of the rotating arm, and an operation for controlling the latch mechanism to adjust the rotating angle of the rotating arm 3. Equipped with arm 4.

A seat back portion B is attached to the free end of the rotating arm 3.
is fixed, and a pin 5 protruding toward the base portion 1 is provided at the end portion thereof on the base portion 1 side. An arc-shaped slit 6 is formed on the base portion 1 side along the locus of movement of the pin 5, and both ends 6 of this slit 6
The movement range of the pin 5, that is, the rotation range of the rotation arm 3 is restricted by a and 6b. Note that the operating arm 4 has a pin 15 fitted into the slit 16.
is provided.

However, according to the conventional seat reclining device, since the slit 6 is formed in the base portion 1, the strength of the base portion 1 in the bending direction is reduced. In particular, this becomes an important problem when the wall thickness of the base portion 1 is set to be thin.

Therefore, an object of the present invention is to provide a press groove along the locus of movement of a pin provided on a rotating arm, store the pin in this press groove, and restrict this pin at both ends of the press groove. This method is intended to eliminate the above-mentioned drawbacks, and will be explained in detail below using examples.

3 to 6 are views showing one embodiment of the seat reclining device according to the present invention, particularly the base part. A press groove 11 is provided along the trajectory. The depth of the press groove 11 is such that the pin 5 accommodated in the groove 11 does not come into contact with the bottom surface 11a, and holes 11b are formed at both ends of the press groove 11. In other words, the press groove 11 has holes 11b at both ends of the movement range of the pin 5 in the base part 10, and the base part 11 is formed along the movement locus between the two ends 11b.
It is formed by pressing 0.

Therefore, the pin 5 is guided along the groove 11,
Moreover, it comes into contact with the edge 11x of the hole 11b, and its movement is restricted.

According to the above configuration, since the base portion 10 does not have a slit like the conventional one, there is no fear that the strength of the base portion 10 will decrease. Also,
Since the press groove 11 protrudes toward the back side of the base portion 10 and has a bead shape, the strength of the base portion 10 can be increased. Furthermore, since the pin 5 abuts against the thick wall surface of the edge 11x of the base portion 10 at both ends of the press groove 11, the pin 5 can be firmly blocked.

Furthermore, by providing a slit S instead of the hole 11b as shown in FIG. 7, and forming a press groove 11 close to the slit S, the pin can be regulated.

Further, a pin 15 is also provided for the manual operation arm 4 for adjusting the rotation angle of the rotation arm 3.
The rotation angle may be adjusted using a groove 11 similar to that explained in FIG.

As described above, the seat reclining device according to the present invention includes a substantially plate-shaped base portion, a rotating arm for operating the seat back portion that is rotatably pivoted to the base portion, and the rotating arm. It consists of an operation arm that adjusts the rotation angle of the rotation angle, and a press groove with a bottom that accommodates a pin made in the base along the locus of movement of the rotation arm or the pin provided on the operation arm. The rotation range of the arm or the operating arm can be reliably regulated, and the strength of the base can be increased, thereby improving reliability. In particular, since holes or slits are formed at both ends of the press groove, the pin can come into contact with the thick wall of the base portion, thereby reliably blocking the pin.

[Brief explanation of drawings]

1 and 2 are a perspective view and a front view showing an example of a conventional seat reclining device, and FIG.
6 to 6 are front views, perspective views, and sectional views showing one embodiment of the seat reclining device according to the present invention, and FIG. 7 is a sectional view and perspective view showing another embodiment of the seat reclining device according to the present invention. It is a diagram. 1, 10...Base part, 3...Rotating arm, 4
...Operation arm, 5, 15...Pin, 6...Slit, 11...Press groove.

Claims (1)

[Claims] 1. A substantially plate-shaped base part, a rotating arm for operating the seat back part that is rotatably pivoted to the base part, an operating arm that adjusts the rotation angle of this rotating arm, and this rotating arm. Or, a hole or slit provided at both ends of the movement range of the pin provided on the operating arm, and a mechanism for storing the pin provided in the base portion along the movement locus of the pin between the holes or slits at both ends. A seat reclining device characterized by comprising a press groove at the bottom.