JP2011046366A - Reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reclining device which easily performs mounting of a spring and suppresses an installment space of the spring to a small degree. <P>SOLUTION: Mounting of the spring can be easily performed by providing a shaft mounting part 22 fittable to a shaft on the end of the spring 2, and further, the height dimension of the winding part 21 of the spring 2 can be reduced by forming the winding part 21 by winding the spring 2 into a conical swirl shape. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a reclining device that holds a seat back in a tiltable manner with respect to a seat cushion of a seat on which a person is seated, and particularly relates to a vehicle seat.

  Conventionally, a wide variety of devices have been proposed as reclining devices to be installed in vehicle seats. As a reclining device that can be easily attached to a seat and is reduced in size and weight, for example, a so-called round reclining device described in Patent Document 1 has been put into practical use. (Hereafter, the background art figure numbers shown in the patent literature are used.)

  Patent Document 1 provides a twin recliner for a seat that enables reclining of a seat back with respect to a seat cushion. The recliner including the master recliner assembly (door side) and slave recliner assembly and the individual parts or subassemblies for the slave recliner assembly and master recliner assembly (door side) is a mirror image part. The master and slave recliner assemblies are at the transition between the seat back and seat cushion on each side of the seat. Only the master recliner has an actuating hand lever that directly actuates the pivotable cam, and the connecting rod connected to the master recliner transmits the movement to the slave recliner to disengage and / or engage the mating parts. Make it easy to join.

  First, in the twin recliner for an automobile seat assembly of one embodiment, the master recliner (1) and the slave recliner (2) appropriately connected by the connecting rod (R) are fixed to the ends on each side of the seat assembly. ing. A master recliner having a lower housing (H) is attached to the seat cushion assembly (C), and an upper housing (L) is attached to the seat back assembly, and the recliner is movable so as to transmit movement around a hinge in the lower housing (H). A member is formed. The lower housing (H) and the upper housing (L) are arranged in an overlapping manner.

  Next, the master recliner 1 is connected to the slave recliner (2) by a rotatable connecting rod (R) having a bracket (N) having a corresponding rotational movement. The connecting rod (R) transmits the reciprocating rotational motion of the master recliner (1) to the slave recliner (2) during operation.

  The master recliner (1) also includes a non-rotatable shaft arm (D) positioned in the axial direction between the lower housing (H) and the upper housing (L). The shaft arm (D) is split at one end and is provided with a longitudinal cleavage (S1). The other end of the non-rotatable shaft arm (D) has a plurality of step structures (4) to (10) around it to provide a space for assembling various parts of the master recliner (1). providing.

  In addition, even if the shaft is not cleaved, a spring mounting hole is drilled in a part of the shaft, one end of the spring is inserted into the mounting hole, and the other end is engaged with the seat side bracket. The urging force of the spring can be transmitted to the shaft.

JP-T-2007-517566

  In the above-mentioned patent document, there is a problem in that man-hours are required because a longitudinal tear is provided on the shaft of the reclining device or a mounting hole is formed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a reclining device that makes it easy to mount a spring and can reduce the installation space of the spring. .

  In order to solve the above-mentioned problem, the reclining device according to claim 1 is a reclining device that holds tilting of a backrest of a vehicle seat, and includes a spring that biases a shaft of the reclining device. A spring mounting portion for mounting a spring mounting portion is formed, a winding portion in which a linear spring is wound in a conical spiral shape, and a shaft mounting portion that can be fitted to the spring mounting portion at the end are formed on the spring. This is a technical feature.

  According to the reclining device of the first aspect, since the shaft attachment portion that can be fitted to the spring attachment portion is provided on the shaft at the end portion of the spring, the spring can be easily attached.

  In addition, since the winding part is formed by winding a linear spring in a conical spiral shape, the height of the winding part of the spring can be reduced and the installation space of the spring can be reduced compared to the case of winding in a cylindrical shape. be able to.

Diagram showing spring shape AA sectional view of FIG. Schematic of the spring assembled to the reclining device shaft

  A reclining device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the spring 2 for biasing the shaft 1 of the reclining device includes a winding portion 21 around which a linear spring is wound, a shaft attachment portion 22 formed at one end and engaged with the shaft 1, and at the other end. A bracket mounting portion 23 that is formed and engages with the seat side bracket is formed.

  As shown in FIG. 2, the winding portion 21 is formed by winding a linear spring in a conical spiral shape, and the height dimension of the winding portion 21 of the spring is larger than when the linear spring is wound in a cylindrical shape. The urging force for urging the shaft 1 can be sufficiently secured.

  As shown in FIG. 3, the shaft attachment portion 22 is formed by being bent into a polygon such as a quadrangle in accordance with the cross-sectional shape of the spring attachment portion 11 formed on the shaft 1, and is inserted into the shaft 1. The spring mounting portion 11 can be fitted.

  As described above, in the reclining device of the present invention, the spring 2 is wound in a conical spiral shape to form the winding portion 21 so that the installation space of the spring 2 can be kept small. Along with the cross-sectional shape of the mounting portion 11, the shaft mounting portion 22 bent in a polygonal shape is formed at one end of the spring 2, so that the shaft 1 can be easily mounted without providing a notch or a tear. .

DESCRIPTION OF SYMBOLS 1 Shaft 11 Spring attaching part 2 Spring 21 Winding part 22 Shaft attaching part 23 Bracket attaching part

Claims (1)

A reclining device that holds the tilt of a backrest of a vehicle seat, comprising a spring that biases a shaft of the reclining device,
Forming a spring attachment portion for attaching a spring attachment portion to the shaft;
A reclining device, wherein a winding part obtained by winding a linear spring in a conical spiral shape on the spring and a shaft attaching part that can be fitted to the spring attaching part are formed at an end part.

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