CHAIR BACKREST MOUNTING DEVICE
A chair backrest mounting device includes a main body, a middle fixing seat, and two side fixing seats. The main body is made of a flexible material. The middle and side fixing seats are made of a rigid material and embedded in a middle portion and two opposite end portions of the main body, respectively, so that the chair backrest mounting device can maintain sufficient flexibility and deformability to bear forces applied thereto in different angular directions, and sufficient rigidity to avoid easy elastic fatigue and breaking of the main body. Moreover, joint faces between the flexible main body and each of the rigid middle fixing seat and side fixing seats are non-flat faces to provide increased contact area and enhanced joining strength.
The present invention relates to a part for a chair, and more particularly to a chair backrest mounting device for connecting a chair backrest to a backrest support.
BACKGROUND OF THE INVENTIONIt is therefore tried by the inventor to develop an improved chair backrest mounting device that has sufficient flexibility and deformability to bear external forces applied thereto from different angular directions, and also sufficient rigidity to avoid easy elastic fatigue and breaking at portions having fastening elements extended therethrough and to provide enhanced binding strength.
SUMMARY OF THE INVENTIONA primary object of the present invention is to provide a chair backrest mounting device that has sufficient flexibility and rigidity to support a chair backrest and is durable for use.
To achieve the above and other objects, the chair backrest mounting device according to the present invention includes a main body, a middle fixing seat, and two side fixing seats. The main body is made of a flexible material. The middle and side fixing seats are made of a rigid material and embedded in a middle portion and two opposite end portions of the main body, respectively. The middle fixing seat is provided with a central through hole to serve as a middle mounting hole, and the side fixing seats each are provided with a central through hole to serve as a side mounting hole. Moreover, joint faces between the flexible main body and each of the rigid middle fixing seat and side fixing seats are non-flat faces to provide increased contact area and enhanced joining strength.
With the above arrangements, the chair backrest mounting device according to the present invention is durable for use and can strengthen the chair backrest.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
Please refer to
The main body 10 is made of a flexible material, so that the chair backrest mounting device is deformable when it is subject to external forces applied thereto in different angular directions.
The middle fixing seat 20 is made of a rigid material and is embedded in a middle portion of the main body 10. The middle fixing seat 20 is internally provided a central through hole to serve as a middle mounting hole 22 for a fastening element (not shown in
The middle fixing seat 20 made of a rigid material provides sufficient structural strength to avoid easy elastic fatigue and breaking of the main body 10 at the middle mounting hole 22 due to deformation of the main body 10 under external force over a long time.
The side fixing seats 30 are also made of a rigid material and are separately embedded in two opposite end portions of the main body 10. The side fixing seats 30 each are internally provided a centered through hole to serve as a side mounting hole 32 for a fastening element (not shown in
Similarly, the side fixing seats 30 made of a rigid material provide sufficient structural strength to avoid easy elastic fatigue and breaking of the main body 10 at the side mounting holes 32 due to deformation of the main body 10 under external force over a long time.
Joint faces 12 between the flexible main body 10 and each of the middle fixing seat 20 and the side fixing seats 30 are non-flat faces to provide an increased contact area and ensure enhanced joining strength between the main body 10 and the fixing seats 20, 30. In the illustrated first preferred embodiment, the joint faces are wave-shaped faces.
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The present invention is novel, improved and industrially practical for use because it includes rigid fixing seats embedded in the flexible main body at portions that are relatively easy to break, so that the chair backrest mounting device can maintain sufficient flexibility and deformability to bear forces applied thereto in different angular directions, and sufficient rigidity to avoid easy elastic fatigue and breaking of the main body. Moreover, the non-flat joint faces between the flexible main body and the rigid middle fixing seat and side fixing seats provide increased contact area and enhanced joining strength. It is anticipated products derived from the chair backrest mounting device of the present invention can fully meet market demands in terms of its industrial applicability.
The present invention has been described with some preferred embodiments thereof and it is understood that many changes and modifications in the described embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims
1. A chair backrest mounting device, comprising:
- a main body being made of a flexible material;
- a middle fixing seat being made of a rigid material and embedded in a middle portion of the main body, and the middle fixing seat being internally provided a central through hole to serve as a middle mounting hole; and
- two side fixing seats being made of a rigid material and separately embedded in two opposite end portions of the main body, and each of the two side fixing seats being internally provided a central through hole to serve as a side mounting hole;
- wherein joint faces between the main body and each of the middle fixing seat and the side fixing seats are non-flat faces, which provide increased contact area and accordingly enhanced joining strength between the main body and the fixing seats.
2. The chair backrest mounting device as claimed in claim 1, wherein the middle and the side mounting holes are internally threaded.
3. The chair backrest mounting device as claimed in claim 1, wherein the side fixing seats each are further provided at a front face with a plurality of spaced pointed teeth.
4. The chair backrest mounting device as claimed in claim 1, wherein the non-flat joint faces between the main body and each of the middle and the side fixing seats are wave-shaped faces.
5. The chair backrest mounting device as claimed in claim 1, wherein the non-flat joint faces between the main body and each of the middle and the side fixing seats are serrated faces.
6. The chair backrest mounting device as claimed in claim 1, wherein the non-flat joint faces between the main body and each of the middle and the side fixing seats are fluted faces.
Type: Application
Filed: Apr 17, 2009
Publication Date: Oct 21, 2010
Inventor: Shun Hwong (Taipei)
Application Number: 12/425,946
International Classification: A47C 31/00 (20060101);