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Expandable chair assembly

a chair and extension technology, applied in the field of chairs, can solve the problems of numbness, pain, fatigue of the sitter on the convention chair,

Inactive Publication Date: 2012-04-19
LI WAN YU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The main objective of the invention is to provide an expandable chair assembly to support legs of a user in an expanded condition. The chair assembly has a seat, a backrest and an expandable leg supporting device. The seat has a front end and a rear end. The backrest is connected to the rear end of the seat. The expandable leg supporting device is mounted on the front end of the seat and has a base, at least one extension frame and a frame driving device. The base is mounted securely on the front end of the seat. The least one extension frame is connected to the base. The frame driving device is mounted on the base and is connected to the at least one extension frame to pivot the at least one extension frame relative to the base.

Problems solved by technology

However, when a person sits on a chair for a long time, for example in a long vehicle traveling, the legs of the sitter on the convention chair will become tired, numb or pained due to long term of bending.

Method used

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Examples

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Embodiment Construction

[0017]With reference to FIGS. 1 and 2, an extendable chair assembly in accordance with the present invention comprises a seat 10, a backrest 20 and an expandable leg supporting device 30. The seat 10 has a front end and a rear end. The backrest 20 is connected to the rear end of the seat 10.

[0018]The expandable leg supporting device 30 is mounted on the front end of the seat 10 and comprises a base 31, at least one extension frame 33,33A,33B and a frame driving device 32. The base 31 is mounted securely on the front end of the seat 10. The at least one extension frame 33,33A,33B is connected to the base 31. Preferably, three extension frames 33,33A,33B are implemented, are telescopically connected with each other and include an outer extension frame 33, a middle extension frame 33A and an inner extension frame 33B arranged from outside to inside in sequence. Each extension frame 33,33A,33B has a volume gradually increasing from the inner extension frame 33B to the outer extension fr...

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PUM

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Abstract

A chair assembly has a seat, a backrest and an expandable leg supporting device. The seat has a front end and a rear end. The backrest is connected to the rear end of the seat. The expandable leg supporting device is mounted on the front end of the seat and has a base, at least one extension frame and a frame driving device. The base is mounted securely on the front end of the seat. The least one extension frame is connected to the base. The frame driving device is mounted on the base and is connected to the at least one extension frame to pivot the at least one extension frame relative to the base. Accordingly, the chair assembly can be expanded to support legs of a user in an expanded condition.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a chair, and more particularly to an expandable chair assembly to support legs of a user in an expanded condition.[0003]2. Description of Related Art[0004]Chairs enable person sitting thereon to support the weights of the sitter. A chair substantially comprises a seat and a backrest for support the back of a sitter. The backrest may be adjustable in angle relative to the seat to fit with different needs of different sitters.[0005]However, when a person sits on a chair for a long time, for example in a long vehicle traveling, the legs of the sitter on the convention chair will become tired, numb or pained due to long term of bending. Accordingly, the conventional chair should be further improved to provide an enhanced comforting effect.[0006]To overcome the shortcomings, the present invention tends to provide an extendable chair assembly to mitigate or obviate the aforementioned problems....

Claims

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Application Information

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IPC IPC(8): A47C7/50
CPCB60N3/063B60N2/4495B60N2/995
Inventor CHANG, CHIN-CHENYIN, QING-KUN
Owner LI WAN YU
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