JP2002199964A - Installation structure of armrest for seat side - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armrest, assembled on the basis of an armrest frame made of polypropylene and mounted on a metal pivotally supporting shaft, which makes no friction noise with a simple structure. SOLUTION: This armrest 2 that is equipped with nylon bushes 3, 4 fitted inside the bearing hole 21 of an armrest frame 20, is mounted on a support shaft 12 by inserting the pivotally supporting shaft 12 into the hole 21 protected by the bushes 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat side armrest mounting structure in which an armrest is mounted on a side portion of a seat back so as to be capable of rotating forward or upright.

[0002]

2. Description of the Related Art As a seat for an automobile, there is a seat equipped with an armrest A which can be turned forward or backward and rotated on the side of a seatback B as shown in FIG. In this seat, in order to reduce the overall weight, the armrest frame is formed by resin molding with lightweight and inexpensive polypropylene, and the armrest frame made of the resin is provided with an armrest assembled to a base. I have.

[0003] With respect to the armrest, a metal shaft is provided as a pivot shaft of the armrest protruding from a side portion of the seatback in order to maintain the support stability of the armrest. However, the metal pivot shaft and the polypropylene armrest frame inevitably generate noise due to friction.

[0004]

SUMMARY OF THE INVENTION The present invention provides an armrest in which a polypropylene armrest frame is assembled to a base, and even if the armrest is assembled to a metal pivot shaft, noise is generated due to friction. It is an object of the present invention to provide a mounting structure for an armrest for a seat side, which can be prevented by a simple structure.

[0005] In addition, an object of the present invention is to provide a seat side armrest mounting structure which is assembled with a structurally robust armrest.

[0006]

According to a first aspect of the present invention, there is provided an armrest mounting structure for a seat side, comprising an armrest in which a polypropylene armrest frame is assembled to a base, and the armrest is provided at a base of the armrest frame. It is mounted on a metal pivot shaft that protrudes from the side of the seat back with the provided bearing hole, and is equipped so that it can be turned forward or backward and rotated.A nylon bush is fitted into the bearing hole of the armrest frame. The armrest is assembled to the pivot shaft by inserting the pivot shaft of the armrest into the diameter of the bush.

In the seat side armrest mounting structure according to a second aspect of the present invention, a bush provided with a stopper flange protruding from a hole edge of the bearing hole is provided by being fitted into the bearing hole of the armrest frame. The armrest is assembled to the pivot shaft by interposing the stop flange of the armrest with the seatback frame side on which the pivot shaft protrudes.

The seat side armrest mounting structure according to a third aspect of the present invention is provided with an armrest which is formed by assembling a polypropylene armrest frame mixed with long fibers of glass on a base.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, the illustrated embodiment is based on a side plate 11 mounted and fixed to a seat back frame 10 of a seat back 1 as shown in FIG. The armrest 2 is provided with a pivot shaft 12 provided as will be described later.
Are held so as to be rotatable forward or upright.

As shown in FIG. 2, the armrest 2 is assembled with an armrest frame 20 made of polypropylene as a base. The armrest frame 20 is long and extends over substantially the entire length of the armrest 2. One end of the armrest frame 20 is formed as a base by providing a bearing hole 21 of the pivot shaft 12 with a cylindrical boss. At the base of the armrest frame 20, guide grooves 22a and 22b of stopper pins described later are provided in an arc shape concentric with the bearing hole 21.

The armrest frame 20 is preferably made of polypropylene mixed with long glass fibers.
The glass fibers may have a residual fiber length of about 8 mm mixed at a content of 30 to 50%, preferably about 40%. According to the armrest frame, high elasticity and high strength can be imparted, and impact resistance and wear resistance can be improved, so that a structurally robust armrest can be assembled.

The armrest frame 20 is used as a base, and the cushion pad 23 is attached to the armrest frame 20.
The armrest 2 is assembled by covering the entirety including the cushion pad 23 with the trim cover 24. The armrest 2 is provided with a side opening 25 through which the pivot shaft 12 is inserted, by trimming a trim cover 24 corresponding to the bearing hole 21 of the armrest frame 20.

In the armrest 2, as shown in FIG. 2, a bush 3 made of nylon having high lubricity is provided by being fitted into a bearing hole 21 of an armrest frame 20 from both sides. One of the bushes 3 and 4 facing the seat back frame 10 is provided with a cylindrical portion 3a fitted in the hole of the bearing hole 21 and a stopper flange 3b protruding from one edge of the cylindrical portion 3a. (See FIG. 1).

As shown in FIGS. 2 and 3, a large cylindrical portion 4a fitted in the side opening 25 of the armrest 2 and a small cylindrical portion 4b fitted in the hole of the bearing hole 21 are continuously formed at the step 4c. There is provided one formed. The bush 4 is used for fitting and fixing a cap to be described later, and a plurality of receiving holes 4d are provided on the side surface of the large cylindrical portion 4a so as to face the latching projections of the cap.

The pivot shaft 12 of the armrest 2 is provided with a metal round bar made of iron or the like having a shaft end formed by a screw shaft. The pivot shaft 12 is erected and held by a bracket 13 assembled by an outer cover 13a and an inner cover 13b. Its bracket 13
Is fixed to the plate surface of the side plate 11 with a tightening bolt 14 (see FIG. 1), and the pivot shaft 12 of the armrest 2 is fixed.
Is mounted so as to protrude outward from a side portion of the side plate 11.

The pivot shaft 1 is mounted on the bracket 13.
The stopper plate 16 facing the stop flange 3b of the bush 3 is provided on the protruding base of the pivot shaft 12 by inserting the two axes and fixing it to the plate surface of the outer cover 13a with the tightening bolt 15. The stopper plate 16 has two stopper pins 17 for locking the armrest 2 at the forward tilting position or the upright position.
a and 17b are provided (see FIG. 1).

2 and 4 in addition to the components described above.
A cap 5 is provided as shown in FIG. The cap 5 is provided with a cover plate 5 that covers the side opening 25 of the armrest 2.
a, a standing wall portion 5b fitted to the large cylindrical portion 4a of the bush 4
And a resin made of the following. The cap 5 has a cylindrical standing wall 5b and a cover plate 5
The flange portion a is formed so as to protrude outward from the standing wall portion 5b so as to cover the side opening 25 of the armrest 2. The standing wall portion 5b has a large cylindrical portion 4 of the bush 4.
A latching projection 5c (only one is shown) that meshes with the receiving hole 4d provided in the hole a is provided by cutting out the side surface.

In order to attach the armrest 2 to the side of the seat back 1 from the above-described components, the bush 3 is fitted in a bearing hole 21 of the armrest frame 20 and is provided in advance. The armrest 2 having the bush 3 is connected to the side plate 1 of the seat back frame 10.
The pivot shaft 12 protruding from 1 is inserted into the diameter of the bush 3 and assembled to the support shaft 12 through the bearing hole 21 of the armrest frame 20.

When assembling the armrest 2, FIG.
The guide grooves 22a, 22 provided with two stopper pins 17a, 17b in an arc shape concentric with the bearing hole 21 as shown in FIG.
b.

In the armrest 2, the small cylindrical portion 4b is fitted into the bearing hole 21 through the side opening 25,
The large cylinder portion 4a is fitted into the side opening 25 of the armrest 2, and the bush 4 is assembled with the small cylinder portion 4b as a bearing of the pivot shaft 12. Next, the flat washer 6a is applied to the step 4c of the bush 4 and the spring washer 6
b is fitted on the axis of the pivot shaft 12 projecting to the large cylindrical portion 4 a of the bush 4, and the nut 6 c is screwed into the tip of the pivot shaft 5.

Finally, the upright wall 5b of the cap 5 is fitted into the large cylinder 4a of the bush 4 and into the cylinder, and the latching projection 5c
The cap 5 is fastened to the bush 4 by being engaged with the receiving hole 4d. The cap 5 is secured to the bush 4 by the nut 6c screwing the bush 4 into the shaft end of the pivot shaft 12, and is fixed to the bush 4 by engaging the latching projection 5c with the receiving hole 4d. It is attached so that it does not come off even if it receives vibrations during traveling as an automobile seat.

In the armrest mounting structure constructed as described above, the armrest frame 20 made of polypropylene is used.
Is provided on the base, and the armrest 2 is attached to the metal pivot shaft 12.
Since the pivot shaft 12 is inserted into the nylon bushes 3 and 4 provided in the bearing hole 21 of the armrest frame 20 and bearings, it is possible to prevent the generation of abnormal noise when the armrest 2 is tilted forward or set up and rotated. .

In addition, the bush 3 has a bearing hole 21
The armrest frame 20 comes into direct contact with the metal member because the stopper flange 3b of the bush 3 is interposed between the stopper flange 16 protruding from the pivot shaft 12 because the stopper flange 3b projects from the edge of the hole. To prevent abnormal noise from being generated.

[0024]

As described above, according to the seat side armrest mounting structure of the first aspect of the present invention, the armrest is formed by assembling a polypropylene armrest frame on the base, and the armrest is mounted on the armrest frame. Even when assembled to a metal pivot shaft protruding from the side of the seat back with a bearing hole provided in the base, a nylon bush is fitted in the bearing hole of the armrest frame, and the pivot shaft of the armrest is provided. By assembling the armrest to the pivot shaft so as to be inserted into the diameter of the bush, it is possible to prevent the generation of abnormal noise due to the forward movement of the armrest or the upright rotation of the armrest.

According to the seat side armrest mounting structure of the second aspect of the present invention, a bush provided with a stopper flange protruding from a hole edge of the bearing hole is provided by being fitted into the bearing hole of the armrest frame. By attaching the armrest to the pivot shaft by interposing the stopper flange of the bush between the seat back frame side where the pivot shaft protrudes, it is possible to prevent the armrest frame from coming into direct contact with the metal member and to generate abnormal noise. Occurrence can be reliably prevented.

According to the seat side armrest mounting structure of the third aspect of the present invention, the armrest is formed by assembling a polypropylene armrest frame into which a long glass fiber is mixed with the base, thereby providing high elasticity.
High strength can be imparted to the armrest frame to improve impact resistance and abrasion resistance, so a structurally robust armrest can be assembled

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an expanded view showing components required for a seat side armrest mounting structure according to the present invention.

FIG. 2 is a cross-sectional view showing a mounting structure of a seat side armrest according to the present invention.

FIG. 3 is a perspective view showing a bush required for a seat side armrest mounting structure according to the present invention.

FIG. 4 is a perspective view showing a cap required for a seat side armrest mounting structure according to the present invention.

FIG. 5 is an explanatory view showing a forward rotation or upright rotation positioning mechanism of the armrest required for the seat side armrest mounting structure according to the present invention.

FIG. 6 is an explanatory diagram showing an automobile seat including a seat side armrest according to a general example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat back 12 Axis shaft 2 Armrest 20 Armrest frame 21 Bearing hole 3, 4 Bush 3b Bush stopper flange

Claims (3)

[Claims] An armrest in which a polypropylene armrest frame is assembled to a base body is attached to a metal pivot shaft protruding from a side of a seat back through a bearing hole provided in a base of the armrest frame. In a mounting structure of an armrest for a seat side, which is equipped so as to be able to rotate forward or vertically, a bush made of nylon is fitted in a bearing hole of an armrest frame, and a pivot shaft of the armrest is inserted into a diameter of the bush. An armrest mounting structure for a seat side, wherein the armrest is attached to a pivot shaft. 2. A bush provided with a stopper flange projecting from a hole edge of a bearing hole is fitted in a bearing hole of an armrest frame, and the stopper flange of the bush is provided between the bush and the seatback frame side from which the pivot shaft projects. The mounting structure for an armrest for a seat side according to claim 1, wherein the armrest is assembled to the pivot shaft so as to be interposed therebetween. 3. The mounting structure for an armrest for a seat side according to claim 1, further comprising an armrest in which an armrest frame made of polypropylene mixed with long fibers of glass is assembled on a base.