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Angle adjusting/positioning device for a backrest of a chair

a backrest and angle adjustment technology, which is applied in the direction of chairs, vehicle components, vehicle arrangements, etc., can solve the problems of high price of seats and unsuitable for large chairs, and achieve the effect of reliable positioning and easy operation of the backres

Inactive Publication Date: 2013-11-28
LIN CHANG CHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The objective of this invention is to create a device that makes it easy to adjust the angle of a chair's backrest and reliably position it in place.

Problems solved by technology

However, the chassis is expensive and is not suitable for large chairs such as sofas and leisure chairs.

Method used

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  • Angle adjusting/positioning device for a backrest of a chair
  • Angle adjusting/positioning device for a backrest of a chair
  • Angle adjusting/positioning device for a backrest of a chair

Examples

Experimental program
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Effect test

Embodiment Construction

[0017]With reference to FIGS. 1-5, an angle adjusting / positioning device for a backrest of a chair according to the present invention is mounted to a connection between a backrest 6 and a seat 7 of a chair. A side of a backrest 6 is pivotably connected to a rear end of an armrest 81 located above a base 8 of the chair. The seat 7 includes a side having a receiving portion 72 receiving a guiding rod 82 including a lower end connected to the base 8 and an upper end connected to a front end of the armrest 81. According to the form shown, the angle adjusting / positioning device includes a first mounting base 1, a second mounting base 2, an elastic element 3, a handle mechanism 4, and an axle 5. The first mounting base 1 includes a first sleeve 11 and a tab 12 provided on an outer periphery of the first sleeve 11. The tab 12 is engaged in a receiving hole 61 in a lower end of the backrest 6. The first sleeve 11 includes a first axle hole 13. A first toothed portion 14 is formed on an end ...

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PUM

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Abstract

An angle adjusting / positioning device includes first and second sleeves fixed to a backrest and a seat of a chair. The first sleeve has a first axle hole and a first toothed portion. A second sleeve includes a second axle hole, a second toothed portion, and a positioning portion. A third sleeve has a third axle hole and an actuating portion. An axle extends through the first, second, and third axle holes. A handle fixed to the third sleeve is operable to move the actuating portion relative to the positioning portion, causing the second toothed portion to engage with or disengage from the first toothed portion. An angular position of the backrest relative to the seat is adjustable when the second toothed portion disengages from the first toothed portion. The angular position of the backrest is fixed when the second toothed portion engages with the first toothed portion.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to an angle adjusting / positioning device for a backrest of a chair and, more particularly, to an adjusting device allowing easy operation in adjustment of an angular position of a backrest of a chair and providing reliable positioning for the backrest.[0002]Conventional backrests of chairs are adjustable in angular positions to provide lying comfort. Conventional backrest adjusting devices generally include a chassis below the seat, with a lower end of the backrest coupled to the chassis that allows adjustment of the angular position of the backrest. However, the chassis is expensive and is not suitable for large chairs such as sofas and leisure chairs.[0003]FIG. 10 shows a conventional chair having an adjustable device 4′ for adjusting the angular position of a backrest 5′ of the chair. A guiding rod 2′ is fixed on a base 1′ of the chair, and the adjusting device 4′ is mounted to a seat 3′ of the chair and around the gu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A47C3/00
CPCA47C1/026A47C1/03238A47C1/0325A47C1/03294
Inventor LIN, CHANG CHEN
Owner LIN CHANG CHEN