JPH0252631U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of this invention.
Fig. 2 is a side explanatory view showing an automobile seat to which the above embodiment is attached, Fig. 3 is an enlarged cross-sectional view taken along the line - - of Fig. 2, and Fig. 4 is an explanatory cross-sectional view taken along the line - - of Fig. 3; FIG. 5 is an explanatory view showing a case where a rotational force is applied from the seat back side, and FIG. 6 is an explanatory view showing a case where a rotational operation force is applied from the handle side. 2... Handle means, 3... Operating member, 4... Eccentric shaft, 5... Internal gear member, 6... External gear member, 8... Driven member, 9... Torsion coil spring, 11... Seat back, 12... Seat bottom, 31... Handle. Part, 33... Operating piece, 78... Chain, 83... Actuated piece, 91... Locking end, 92... Projecting end, 111... Upper bracket, 121... Lower bracket,
122... Shaft body, 331... Contact surface of actuating piece, 831
...Abutting surface of actuated piece, 841...Concave groove.

Claims (1)

[Scope of utility model registration request] An upper bracket attached to the seat back, a lower bracket attached to the seat bottom, an internal gear provided on one of the pair of brackets, and at least one tooth less than the internal gear provided on the other bracket. It has a number of externally toothed gears, a regular shaft part and an eccentric shaft part, the regular shaft part pivotally supports one of the pair of gears, and the eccentric shaft part pivotally supports the other gear. an eccentric shaft that engages both gears with each other in the above-mentioned state, a handle means provided on one of the pair of brackets, and a rotation transmitting means that transmits the rotational operating force of the handle means to the eccentric shaft; In the angle adjustment device for an automobile seat, the seat back is configured to tilt in the front and rear directions with respect to the seat bottom by forward and reverse rotation operations of the handle means, the handle means comprising a shaft body protruding from the bracket; A cylindrical driven member is fitted around the shaft so as to be rotatable around the shaft, and the rotation transmission means is engaged around the driven member, and a torsion coil is sheathed around the shaft so as to tighten the shaft. It has a spring, and an operation handle that is fitted onto the shaft so as to be rotatable around the shaft, and the operation handle has a protruding arc-shaped actuating piece centered on the shaft, and the driven member An arcuate actuated piece with the shaft as the center is formed protrudingly formed, and a gap is formed between the actuating piece and the actuated piece in the rotational direction around the shaft, and a gap is formed between the actuating piece and the actuated piece. The actuating piece and the torsion coil spring are arranged so that their end surfaces come into contact with each other by relative rotation around the shaft, and the torsion coil spring is bent so that its base end protrudes in the axial direction of the torsion coil spring. In addition, the tip of the torsion coil spring is bent so as to protrude outward in the radial direction, and the driven member is formed with a locking portion into which the base end of the torsion coil spring is fitted, and the base end is bent. While being fitted into the locking portion, the tip of the torsion coil spring is inserted into the gap between the actuating piece and the actuated piece, with the torsion coil spring being fitted onto the shaft body.
The torsion coil spring is arranged so as not to be in contact with the actuated piece, and the torsion coil spring is wound around the shaft body in such a direction that the coil diameter of the torsion coil spring becomes smaller due to a force in the direction of tilting the seat back toward the rear of the seat. An angle adjustment device for an automobile seat, which is characterized by being rotated.