JPS6310765Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rocking chair that tilts backward from the middle of the backrest.

2. Description of the Related Art Various types of rocking chairs have been put into practical use, such as conventional low chairs and chairs with legs, in which the upper part of the backrest tilts backwards when the upper body is placed on the backrest. However, in conventional rocking chairs of this type, the upper part of the backrest simply tilts back in accordance with the backward tilt of the user's body. When tilting backwards, a gap is created between the lumbar region and the backrest, which results in insufficient support for the lumbar region, which causes fatigue.

The purpose of this invention was to solve these drawbacks and provide a chair in which the upper part of the backrest tilts backwards and at the same time the lumbar support part bulges forward, providing sufficient support for the lumbar part of the body at all times. It is something.

In other words, in the Rotsuking chair of this invention, the backrest frame of the chair consists of an upper backrest frame and a lower backrest frame, and a rotation shaft extending across the lower end of the upper backrest frame is inserted into a cylindrical collar provided at the upper end of the lower backrest frame. It is rotatably joined, and at least two support rods are integrally provided on the rotation shaft facing downward, and a support rod with a cylindrical collar as the base is attached to the rotation shaft stretched across the lower part of the lower backrest frame. Insert
This chair is characterized in that the outer periphery of the frame material of the chair, which is made up of coil springs stretched between upper and lower support rods, is covered with a cushion material.

The following description will be made based on drawing examples.

FIG. 1 is a perspective view of the frame material of the chair. The frame material is formed by integrally forming a seat frame 1 with a reinforcing plate 10 and a backrest frame, and the backrest frame consists of a lower backrest frame 2 and an upper backrest frame 4 that rise directly upward from the edge of the seat frame 1. A rotating shaft 7 is stretched between the lower end frames of the vertical frame 5 of the backrest frame 4, and cylindrical collars 6 are integrally provided on both sides of the upper end of the lower backrest frame 2 using attachment pieces 8, etc. The upper and lower backrest frames are joined while inserted into the collar 6.
Two pipe-shaped support rods 11 are integrally provided on the rotation shaft 7 of the upper backrest frame 4 so as to face downward.
A reinforcing plate 12 is attached between 1 and 1. A rotating shaft 3 is stretched across a portion of the lower backrest frame 2 near the lower seat frame 1, and two pipe-shaped support rods 13 having a cylindrical collar 9 as a base are inserted therein, and a reinforcing plate 14 is inserted between the support rods 13. Attach. The upper support rod 11 and the lower support rod 13 are provided at corresponding positions, respectively.
In this example, the coil spring 16 is inserted into the hollow interior of the pipe-shaped support rod 11 and the pipe-shaped support rod 13,
Both ends of the coil spring 16 are connected to the rotating shaft 7 and the cylindrical collar 9, respectively. In this example, two support rods are provided on each of the upper and lower sides, but three or more support rods may be provided. Further, the support rods 11 and 13 are not limited to pipe-like rods, but may also be plate-like or square rod-like objects. If such rods are used, the ends of the support rods 11 and 13 may be joined together with coil springs. good.
In this way, a plurality of support rods 11, 11, 13,
13 are combined to form a support surface that supports the lower back. The lower support rod 13 is equipped with a stop device (not particularly shown) that prevents it from tilting further backward during normal use, and if a stopper 15 is provided at the rear end of this support rod 13, the upper support rod 11 at the normal use position and do not tilt it any further.

Since the frame material of the chair of this invention has such a structure, when weight is applied to the backrest frame, the upper backrest frame 4 tilts backward around the rotation axis 7, and at the same time, the support rod 11 moves forward. The lower support rod 13 is also pulled forward by the coil spring 16 and tilted forward about the rotation shaft 3. As shown in FIGS. 3 and 4, the periphery of the frame material is covered with a flexible and elastic cushion material 17 such as soft polyurethane foam, and the periphery is further covered with a suitable material such as cloth, leather, leather, etc. When the chair is completed by covering it with the surface material 18 and is used, the upper part of the backrest tilts backward due to the backward tilting of the backrest frame 4, and on the other hand, the part where the lumbar part of the body comes into contact is connected to the support rod. 11,13
It bulges out by leaning forward. In this way, with this chair, when the seater rests their body on the backrest and puts their weight on it, the upper part of the backrest locks backwards.
At the same time, the lower part of the backrest that touches the lower back bulges out, so even if the body stretches and the lower back falls forward, the lower back is supported, so the lower back part of the body is always supported and fatigue does not occur. It is effective.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the frame material of the chair, FIGS. 2a and 2b are enlarged sectional views of the support rod portion, and FIGS. 3 and 4 are side sectional views of the chair. 1...Seat frame, 2...Lower back frame, 3, 7...
...Rotation axis, 4...Upper backrest frame, 5...Vertical frame,
6, 9... Cylindrical collar, 11, 13... Support rod.

Claims (1)

[Scope of utility model registration request] The backrest frame of the chair consists of an upper backrest frame and a lower backrest frame, and a rotating shaft extending across the lower end of the upper backrest frame is inserted into a cylindrical collar provided at the upper end of the lower backrest frame and joined for rotation. At least two support rods are integrally provided on the rotation shaft facing downward, and a support rod with a cylindrical collar as a base is inserted into the rotation shaft extending below the lower backrest frame. A rocking chair characterized in that the outer periphery of a chair frame material with a coil spring stretched between them is covered with a cushion material.