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Frame structure for a foldable chair

a frame structure and chair technology, applied in the field of folding chairs, can solve the problems of easy clamping of the fingers and the arms, and safety concerns

Inactive Publication Date: 2010-01-21
CHEN TE LUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Firstly, the foldable structure in the middle of the armrest unit used for enduring the weight of the arms easily becomes loosen up after being bended for several times and the fingers and the arms are easily being clamped and hurt between the joint of the protrusion plate and the receiving slot which could result in safety concern.
Secondly, as shown in FIG. 10, the seat unit is connected with four top points of the front and rear leg units without any support in the central part which would easily be torn apart after being used for a long time.

Method used

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  • Frame structure for a foldable chair
  • Frame structure for a foldable chair
  • Frame structure for a foldable chair

Examples

Experimental program
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Embodiment Construction

[0017]Please refer to FIGS. 3 through 5, the preferred embodiment of the foldable chair includes a front interconnecting supporting unit (10), a rear interconnecting supporting unit (20), a lateral interconnecting supporting unit (30),an arm rest unit (40), a seat supporting unit (50) and a transverse supporting rod (70). The front interconnecting supporting unit (10) is formed with a front leg unit (11), a crisscrossed supporting unit (12), more particularly, the front leg unit (11) comprises an upper portion and lower portion thereof (111, 112), a front base cap (113), a receiving joint (114), and a front gliding sleeve (115). The upper portion of the front leg unit (111) overlapping the lower portion of the front leg unit (112) is installed on the receiving joint (114) and the front gliding sleeve (115) at the top thereof and the front base cap (113) is positioned at the bottom of the lower portion of the front leg unit (112) so as to complete the front leg unit (11). One board m...

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PUM

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Abstract

A frame structure for a foldable chair comprises a front interconnecting supporting unit, a rear interconnecting supporting unit, a lateral interconnecting supporting unit, an armrest unit, a seat supporting unit, an armrest unit, and a transverse supporting rod. The front interconnecting supporting unit is installed with a front leg unit, a crisscrossed supporting unit. The rear interconnecting supporting unit comprises a rear leg unit, an arc-shaped supporting unit of which one end of each section is curved in shape. Each of the lateral interconnecting supporting unit includes two board members pivotally crisscrossed connected with each other between the front and rear leg unit. Beneath the armrest unit, a gliding rod is extending along thereof and a connecting joint is protruding there from. The transverse supporting rod is formed with a connecting plate, a rod and a connecting joint.

Description

BACKGROUND OF THE PRESENT INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a foldable chair, particularly with a seat supporting unit installed between front leg unit and rear leg unit which are parallel to each other and perpendicular to the ground allowing being folded and extended longitudinally.[0003]2. Description of the Related Arts[0004]As shown in FIGS. 7 through 10, the conventional foldable chair is shown to comprise a foldable crisscrossed supporting frame unit and an armrest unit comprising a protrusion plate, a receiving slot and an armrest rod so as to form a foldable structure in the middle portion thereof. However, the conventional invention has disadvantages as following:[0005]Firstly, the foldable structure in the middle of the armrest unit used for enduring the weight of the arms easily becomes loosen up after being bended for several times and the fingers and the arms are easily being clamped and hurt between the joint of the protrus...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A47C4/00
CPCA47C4/286
Inventor CHEN, TE-LUNG
Owner CHEN TE LUNG