Structure of ceiling fan blades their frames
A structure of blade and blade frame for a ceiling fan is disclosed. The inserting parts of a blade frame go through the through holes on a blade. Each inserting part has a stopping part exposed from the blade. An elastic positioning element connects several limiting parts using linear linking parts. The limiting parts urge against the stopping parts in opposite directions, providing constraints between the stopping parts and the blade and, thereby, combining the blade and the blade frame.
1. Field of Invention
The invention relates to a ceiling fan structure and, in particular, to the combination structure of ceiling fan blade and its frame.
2. Related Art
There are usually several blade frames around the motor at the center of a ceiling fan. Each blade frame is mounted with a blade. The invention pertains the technique of combining the blades with their corresponding frames.
In the early days, the blades are fixed on the frames in a ceiling fan. Such a combination is done by simple screw locking. For example, the blade frame is provided with a screw to go through the corresponding blade. A bolt is then used to lock the blade and the blade frame. Such a structure has some inconvenience in the disassembly because each part has to taken apart. Therefore, designs with more convenience structures start to appear.
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Although the above-mentioned three structures of blade and blade frame are more convenient than the conventional structure using screws, the hook, clip or inserting part is positioned on the blade after going through the corresponding through hole. They have to satisfy a certain precision in order to achieve a firm connection, so that no serious wiggles happen when the ceiling fan operates. Taking the structure in
Therefore, it is the goal of the invention to provide a structure of blade and blade frame that can be readily combined and firmly fixed without the need for a high precision as in the prior art.
SUMMARY OF THE INVENTIONIt is an objective of the invention to provide a structure of blade and blade frame for a ceiling fan that is simple and convenient to assemble.
The invention includes:
a blade, whose one end has at least two through holes;
a blade frame, which has an inserting part for each of the through holes on the blade, each of the inserting parts having a stopping part that prevents the blade frame from leaving the blade on the exposed end from the blade; and
an elastic positioning element restoring its position after pressure release, which has a plurality of limiting parts each of which urges against the stopping parts after the inserting parts go through the corresponding through holes, blocking the stopping parts by sticking between the stopping parts and the blade.
The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:
The present invention will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
According to an embodiment, the disclosed structure of ceiling fan blade and blade frame includes: a blade 1, a blade frame 2, and a positioning element 3.
The blade 1 has at least two through holes 11 on one end. As shown in the drawing, the blade 1 in this embodiment has three through holes 11 arranged in a triangular shape.
The blade frame 2 has an inserting part 21 for each of the through hole 11 on the blade 1. Each of the inserting parts 21 has a stopping part 211. The stopping part 211 goes through the corresponding through hole 11 and exposes on the blade 1.
In this embodiment, the inserting parts 21 are independent elements. They are fixed on the blade frame 2 by screws.
The positioning element 3 is elastic and has several limiting parts 31. The limiting parts 31 are connected by a linking part 32 with a linear structure. After the inserting part 21 goes through the corresponding through hole 11, the positioning element 3 is disposed so that the limiting parts 31 urge against the stopping parts 211 and block them by sticking between the stopping parts 211 and the blade 1.
In this embodiment, the positioning element has limiting parts 311 on both ends to coil between the blade and the stopping parts. The two limiting parts 311 are connected by a linking part 32 with another limiting part 312 also coiling between the blade and the stopping part. The positioning element 3 is thus mounted between the stopping parts 211 and the blade 1 with the help of the inserting parts 21 on the blade frame 2.
Each of the stopping parts 211 includes a first stopping part 211a for the limiting part 31 to block after it restores its position and a second stopping part 211b blocking the limiting part 31 after the inserting part 21 goes through the through hole 11.
Besides, the blade 1 has a covering element 4 in this embodiment for covering the part of the inserting part 21 exposed from the blade 1 and the positioning element 3.
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Each of the limiting parts 31 of the positioning element 3 urges against the corresponding first stopping part 211a in parallel to the blade 1 (
Therefore, the positioning element 3 is positioned between the inserting part 21 and the blade 1. If one carelessly touches or pushes the limiting parts 31 or linking part 32 of the positioning element 3, the elasticity thereof prevents the limiting parts 31 from falling off. Moreover, the two inserting parts 311 and the inserting part 312 in the drawing provide opposite blocking forces. Thus, they provide constraints on the inserting parts 21. Taking the structure in this embodiment as an example, when the blade 1 is withdrawn outwards with respect to the blade frame 2, the two limiting parts 311 block it. When the blade 1 is pushed inward with respect to the blade frame 2, the limiting part 312 blocks it. In other words, it does not have same problem as in the prior art where the blade may fall off because the blade and the blade frame have a blocking force in the same direction.
It is clear from the above description that a primary advantage of the invention is to in the simple assembly structure between the blade and the blade frame. Such a structure can prevent the blade from falling off the blade frame.
There are of course many other embodiments of the invention only differing in details. Please refer to
In this embodiment, the positioning element is mounted by squeezing the recessed limiting parts 314. It is then released after the two limiting parts 313 are mounted on the corresponding inserting parts 21. In this case, the limiting parts 313, 314 of the positioning element block the corresponding inserting parts 21. Using such a structure, the blade 1 and the blade frame 2 can be positioned as in the first embodiment.
Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to people skilled in the art. Therefore, it is contemplated that the appended claims will cover all modifications that fall within the true scope of the invention.
Claims
1. A structure of blade and blade frame for a ceiling fan, comprising:
- a blade, whose one end has at least two through holes;
- a blade frame, which has an inserting part for each of the through holes on the blade, each of the inserting parts having a stopping part that prevents the blade frame from leaving the blade on the exposed end from the blade; and
- an elastic positioning element restoring its position after pressure release, which has a plurality of limiting parts each of which urges against the stopping parts after the inserting parts go through the corresponding through holes, blocking the stopping parts by sticking between the stopping parts and the blade.
2. The structure of blade and blade frame for a ceiling fan as in claim 1, wherein the inserting parts are independent elements fixed on the blade frame.
3. The structure of blade and blade frame for a ceiling fan as in claim 1, wherein the blade has a covering element to cover the part of the inserting part exposed from the blade and the positioning element.
4. The structure of blade and blade frame for a ceiling fan as in claim 1, wherein the positioning element has a hook-shaped limiting part on either end thereof and another arc-shaped limiting element between the two hook-shaped limiting parts connected using a linear structure.
5. The structure of blade and blade frame for a ceiling fan as in claim 1, wherein the positioning element has a linear linking part between each two consecutive limiting parts.
6. The structure of blade and blade frame for a ceiling fan as in claim 1, wherein each of the stopping parts includes a first stopping part for the limiting part to block after it restores its position and a second stopping part blocking the limiting part after the inserting part goes through the through hole.
Type: Application
Filed: Nov 18, 2008
Publication Date: May 20, 2010
Inventor: Chao-chin Yao (Taichung City)
Application Number: 12/292,349
International Classification: F04D 29/34 (20060101); F04D 29/38 (20060101);