Title:
Foldable director's chair
Kind Code:
A1


Abstract:
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.



Inventors:
Chen, Te-lung (Tainan, TW)
Application Number:
12/218273
Publication Date:
01/21/2010
Filing Date:
07/15/2008
Primary Class:
International Classes:
A47D1/02
View Patent Images:
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Primary Examiner:
DUNN, DAVID R
Attorney, Agent or Firm:
Te-Lung, Chen (TAINAN, TW)
Claims:
I claim:

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.

Description:

BACKGROUND OF THE PRESENT INVENTION

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 FIGS. 1 through 5, comprises two main leg frames, two interior leg frames and elastic plates. The main leg frames is in square shape and the interior leg frames is in shape which are pivotally crisscrossed with each other with a suitable angle. Each elastic plate is positioned separately on top right angles of the interior leg frame pivotally connecting with the middle portion of each main leg frame. The lower portion of each interior leg frame is pivotally connected with the lower portion of the main leg frame. The canvas seat is installed between two interior leg frames. However, the prior invention as mentioned foregoing has some disadvantages as following:

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 INVENTION

The 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.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the director's chair in unfolded position according to the conventional invention.

FIG. 2 is a perspective view of the director's chair in folded position according to the conventional invention.

FIG. 3 is a schematic drawing illustrating the folding position of the director's chair according to the conventional invention.

FIG. 4 is a schematic drawing illustrating the unfolding position of the director's chair according to the conventional invention.

FIG. 5 is a perspective view of the director's chair with a seat unit according to the conventional invention.

FIG. 6 is a perspective view of the director's chair in unfolded position of the preferred embodiment according to the present invention.

FIG. 7 is a perspective view of the director's chair in folded position of the preferred embodiment according to the present invention.

FIG. 8 is a front view of the director's chair in unfolded position of the preferred embodiment according to the present invention.

FIG. 9 is a front view of the director's chair in folded position of the preferred embodiment according to the present invention.

FIG. 10 is a perspective view of the director's chair matching with a seat unit in extension position of the preferred embodiment according to the present invention.

FIG. 11 is a front view of another arrangement method of the gliding tube of the director's chair according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 6 through 8, the foldable director's chair includes a pair of armrest unit (10), a pair of leg frame unit (20). Each armrest unit (10) and leg frame unit (20) are both hollow tube of which the right angle ends extending straight downward or upward for a suitable length with their opening of the tubes corresponding to each other via a gliding tube (30) connecting through the armrest unit (10) and the leg frame unit (20). The diameter of the gliding tube (30) is smaller than that of the tube of the armrest unit (10) allowing one end of each gliding tube (30) being able to engaged through the tube of the armrest unit (10) and fixed to each other via nails (5) and first retaining sleeve (11) while another end being engaged through the leg frame unit (20) without being fixed allowing the armrest unit (10) moving straightly upward or downward along the gliding tube (30).

Please refer to FIGS. 6 through 9, each of the first retaining sleeve (11) is engaged with the end of the armrest unit (10) and mounted to the gliding tube (30) via the nails (5). Each second retaining sleeve (21) is installed through the leg frame unit (20) respectively in a suitable position thereof and fixed via the nails (6) without being fixed to another end of the gliding tube (30). Inside edge of each first and second retaining sleeve (11, 21), there is a protrusion extending there from and pivotally engaged with each end of arc-shaped supporting unit (40) respectively. When folding the chair in transverse direction, as shown in FIG. 9, the gliding tube (30) is able to move upward with a suitable height without departed from the leg frame unit (20). While extending the chair and being seated, as shown in FIG. 8, the gliding tube (30) is overlapped and covered by the leg frame unit (20). With the weight of the user, the bottom of the armrest unit (10) leans against the top of the leg frame unit (20) forming an arresting assembly:,

Please refer to FIGS. 6 and 10, a seat supporting unit (50) is mounted on the top of the first retaining sleeve (11) between two armrest unit (10). The protrusion edges of the seat supporting unit (50) are provided for canvas seat (60) to engage through respectively. Please refer to FIG. 11, the lower portion of the gliding tube (30) which is engaged through with the second retaining sleeve (21) is installed inside the leg frame unit (20) and mounted to each other via the nails (6). The upper portion of the gliding tube (30) is installed inside the armrest unit (10) without being fixed allowing the gliding tube (30) being able to move along inside of the armrest unit (10). When the armrest unit (10) is unfolded transversely, the bottom of the armrest unit (10) moves downward leaning against the top of the leg frame unit (20).