Foldable director's chair
A foldable director's chair comprises a pair of armrest unit and leg frame unit. Each armrest unit and leg frame unit is hollow tube of which the right angle ends extending straightly downward or upward for a suitable length with their opening of the tubes corresponding to each other via a gliding tube connecting through the armrest unit and the leg frame unit. The diameter of the gliding tube is smaller than that of the tube of the armrest unit allowing one end of each gliding tube being able to engaged through the tube of the armrest unit and fixed to each other via nails and first retaining sleeve while another end being engaged through the leg frame unit without being fixed thereto allowing the armrest unit moving straightly upward or downward along the gliding tube.
1. Field of the invention
The present invention relates to a foldable director chair, that the stress two armrests suffered can be abided by an upright leg frame unit, especially an armrest unit along with an upright leg frame unit moving upward and downward against each gliding tube.
2. Description of the prior art
The prior invention as shown in
Firstly, when unfolding the chair, top of the interior leg frames have to be hold and pressed to elastically move the elastic plates downward in a flash moment which might clamp and hurt someone's fingers for the angles there between is getting smaller. Unless holding the top central portion of the interior leg frames and then press downward can prevent fingers from being hurt or even suffering bone fracture. However, it is still possible to hurt pats of someone's fingers during the unfolding process which might cause a huge safety concern.
Secondly, during folding process, in order to move the elastic plates downward, the bottom of main leg frames have to be stepped against to enforce the strength inwardly for folding the interior frames. When holding top of the interior leg frames, the back of the hands might be collided or clamped by the main leg frames resulting in difficulty for producing force and making folding process much more complicated and difficult.
Thirdly, each connecting point of the elastic plate must be manufactured more accurate; otherwise, the function of others would be affected. However, the accuracy of the manufacture would relatively lower the producing effectiveness and market competitiveness.
Fourthly, the whole structure would easily be damaged and deformed, once the elastic plates suffer from user's weight for a long time.
Fifthly, the length of the seat installed between the main and interior leg frame would be limited and the user's legs would easily bump into the front edge of the interior leg frame which is positioned within the main leg frame.
SUMMARY OF THE INVENTIONThe present invention relates to a foldable director's chair which comprises an armrest unit and a leg frame unit which are both hollow tubes with their right angle ends extending downward or upward for a suitable length against each other and connected through by a guiding tube. The diameter of the gliding tube is smaller than that of the armrest and leg frame unit so that one end of each gliding tube can be engaged through the armrest tube and fixed to each other via the nails and first retaining sleeves while another end engaged through the leg frame unit without being fixed allowing the armrest unit moving straightly upward or downward along the gliding tube.
The present invention as foregoing mentioned has the advantages as following:
Firstly, during folding or unfolding, the armrest unit and the gliding tube are positioned on the same axis allowing the armrest unit to move inward or outward without the assistance of other elements to complete the movement which is more smooth and effort-saving.
Secondly, the folding action can be completed by pushing the armrest unit inward with two hands separately without hurting or clamping the fingers.
Thirdly, when being unfolded, by the top of the leg frame unit leaning against the bottom of the armrest unit immobilizing gliding movement, the canvas seat does not tract inwardly for being seated suffering from downward force.
Fourthly, the installation can be completed without the complicated procedure providing better effectiveness and higher competitiveness.
Fifthly, when the canvas seat is seated with the downward force, the force can be suffered by the upright leg frame unit in average.
Sixthly, the seat supporting unit fixed to one side of each armrest unit not only enforces the stability of the whole structure but also increases the comfort by lengthening the canvas seat with the front edge thereof exceeding the edge of the armrest unit suitably.
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Claims
1. A foldable director's chair comprising:
- an armrest unit and a leg frame unit both being hollow tube with their right angle ends extending straight downward or upward for a suitable length with their opening of the tubes corresponding to each other;
- a gliding tube of which the diameter is slightly smaller than that of said armrest unit and leg frame unit, connecting through said armrest unit and said leg frame unit; one end of each said gliding tube being installed through said armrest unit and fixed thereto via first retaining sleeve and nails, while another end being installed through said leg frame unit without being fixed allowing said armrest unit moving straightly upward or downward along said gliding tube.
2. A foldable director's chair as recited in claim 1, wherein said first retaining sleeve is installed through inside the bottom of said armrest unit and fixed to said gliding tube via said nails; each second retaining sleeve is installed through said leg frame unit at a suitable height thereof and fixed thereto via nails without being fixed to another end of said gliding tube.
3. A foldable director's chair as recited in claim 1, wherein a protrusion extending from inside edge of each said first and second retaining sleeve respectively to pivotally engage with each end of a arc-shaped supporting unit; said gliding tube is able to move upward with a suitable height without being departed from said leg frame unit during folding transversely; said gliding tube is overlapped and covered by said leg frame unit by bottom of said armrest unit leaning against the top of said leg frame unit so as to form an arresting assembly during unfolding and being seated
4. A foldable director's chair as recited in claim 1, wherein a seat supporting unit is installed at the top of said first retaining sleeve between said armrest units respectively; a canvas seat is able to engage through said seat supporting unit of which the front edge is exceeding the edge of said armrest unit.
5. A foldable director's chair as recited in claim 1, wherein the lower portion of said gliding tube is installed through inside of said leg frame unit having said second retaining sleeve engaged through and fixed via said nails; the upper portion of said gliding tube is installed through inside of said armrest unit without being fixed so as to allow said gliding tube able to move along and the bottom of said armrest unit able to move downward leaning against the top of said leg frame unit.
Type: Application
Filed: Jul 15, 2008
Publication Date: Jan 21, 2010
Inventor: Te-Lung Chen (Tainan)
Application Number: 12/218,273
International Classification: A47D 1/02 (20060101);