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A backrest device in a chair

A technology for backrests and chairs, which is applied in the field of backrest devices, and can solve the problems of increased production costs, troublesome installation of back sheet parts, complex structure of back sheet parts, etc.

Inactive Publication Date: 2010-06-02
OKAMURA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the backrest of the chair, the frame of the backrest includes the back frame and the lower bar, and the back sheet member includes upper, right, and left tube portions, and a tubular mounting portion at the lower end, thereby changing the structure of the back sheet member. complex, increases production costs, and makes mounting the back sheet to the back frame and downpost cumbersome

Method used

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  • A backrest device in a chair
  • A backrest device in a chair
  • A backrest device in a chair

Examples

Experimental program
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Embodiment Construction

[0012] exist figure 1 Among them, a chair 1 comprises: a seat 5 on a pillar 4 connected to a leg 2; and a backrest 6 at a rear end of the seat 5. The backrest 6 includes a back frame 6 , a back bar 11 and a back sheet member 12 . The backrest 6 is fastened to the seat 5 by mounting the back bar 11 to the mounting portion 7 . Adjust the backrest 6 to a suitable position so that the backrest 6 moves forward and downward, or backward and upward.

[0013] exist image 3 and Figure 4 Among them, the chair 1 in this embodiment is used for growing children. The backrest 6 can be bent towards the rear of the seat 5 by the weight of the seated person. The backrest 6 is movable relative to the seat 5 and slides forwards and downwards, or backwards and upwards, thereby adjusting the backrest 6 to a suitable position to suit the size of the seated person.

[0014] The lower end of the strut 4 is connected to the upper end of the leg 2 extending radially from the strut 4 . At the l...

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PUM

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Abstract

In the backrest of a chair, a back frame (10) is covered by a back sheet component (12) which is simplified to reduce cost and to make installation to be easy. The back sheet component (12) is shape of packing and has a hatch at the bottom. Apart from the bottom of the back frame (10) is covered by the back sheet component (12), and the lower margin (12b) of the back sheet component (12) is holdedby a holding piece (34) which joints with a jointing support piece (31) of the back frame (10).

Description

technical field [0001] The invention relates to a backrest arrangement in a chair having an opening in the middle of its back frame, said back frame being covered with a back sheet part so as to at least partially close the opening. Background technique [0002] In Japanese Patent No. JP2003-135200A, specifically, in image 3 In the method, the elastic back sheet member is stretched on the backrest of the chair, and the back frame includes left and right side bars and lateral side bars connecting the upper ends of the left and right side bars to each other. The lower rod has holes in which the side rods are attached, and the lower rods also have slots. The back sheet member includes tube portions at the upper edge and at the left and right edge. At the lower end of the back sheet, there is a tubular mounting portion that fits into the slit of the lower bar, and has a joint that keeps the back sheet from loosening. [0003] However, in the backrest of the chair, the frame o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A47C7/40
CPCA47C31/023A47C7/40A47C7/42
Inventor 中山健藤田寿人益永浩
Owner OKAMURA MFG CO LTD