BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become more fully understood from the detailed description given herein below for illustration only, which thus is not limitative of the present invention, and wherein:
FIG. 1 is a schematic view of the conventional art;
FIG. 2A is a structure diagram of components according to a first embodiment of the present invention;
FIG. 2B is a cross-sectional view of a shaft bushing according to the first embodiment of the present invention;
FIG. 3A is a side view of the shaft bushing according to the first embodiment of the present invention;
FIG. 3B is a front view of the shaft bushing according to the first embodiment of the present invention;
FIG. 4 is an assembly view of a rotating shaft according to the first embodiment of the present invention;
FIG. 5A is a mounting diagram of components of a shutter according to the first embodiment of the present invention;
FIG. 5B is a cutaway view of the connection of the rotating shaft according to the first embodiment of the present invention;
FIG. 6A is a structure diagram of components according to a second embodiment of the present invention;
FIG. 6B is a cross-sectional view of a trigonal shaft bushing according to the second embodiment of the present invention;
FIG. 7A is a side view of the trigonal shaft bushing according to the second embodiment of the present invention; and
FIG. 7B is a front view of the trigonal shaft bushing according to the second embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
To further understand the object, structure, feature, and function of the present invention, the present invention is further described below in detail with reference to embodiments and accompanying drawings.
Referring to FIGS. 2A and 2B, they are a structure diagram of components and a cross-sectional view of a shaft bushing according to a first preferred embodiment of the present invention. A shaft bushing 210 and a shaft 220 are included. The shaft bushing 210 has a body 211, a flange 212, and a plurality of gripping portions 213. A shaft hole 214 is formed to pass through front and back ends of the body 211, the flange 212 is disposed on the back end of the body 211, and the gripping portions 213 are protruded from the outer edge of the body 211, and symmetrically about the shaft center of the body 211. The upper sides of the ramps of the gripping portions 213 are connected to form a top edge, the down sides are spaced apart for a predetermined distance and connected to the outer edge of the body 211, and the bottom parts of the gripping portions 213 are connected together. The angle formed between the two ramps of the gripping portions is between 60 degrees and 135 degrees, and the angle may be varied to make the shaft bushing form cylinders in different shapes such as trigonal to octagonal shapes. The shaft bushing 210 in a shape of an octagonal cylinder formed with the angle of 135 degrees is taken as an example in this embodiment.
The shaft 220 is in the shape of a conical nail, and has three parts: a shaft head 221, a shaft middle section 222, and a shaft tail 223 with their outside diameters sequentially from large to small, wherein the outside diameter of the shaft head 221 is larger than that of the aperture of the shaft hole 214, the outside diameter of the shaft middle section 222 is between the outside diameter of the shaft head 221 and that of the shaft tail 223, and the fin 224 is protruded from the outer edge of the shaft tail 223.
The maximum height of the fin 224 is between the outside diameter of the shaft middle section 222 and that of the shaft tail 223. One end portion of the fin 224 that is close to the shaft tail 223 is called a first end 2241, and the other end portion that is close to the shaft middle section 222 is called a second end 2242, wherein the width and height of the first end 2241 are smaller that that of the second end 2242. According to users' different requirements, the second end 2242 of the fin 224 is connected to the shaft middle section 222.
Referring to the FIGS. 3A and 3B, they are respectively a side view and a front view of a shaft bushing according to the first preferred embodiment of the present invention. As shown in the figures, the outside diameter of the front end 210A of the shaft bushing is made to be a little smaller than that of the back end 210B of the shaft bushing, so as to form a slight gradient difference. Of course, the outside diameter of the back end of the body may also be designed to be larger than that of the front end of the body so as to achieve the same effect, or the body may be adjusted, such that the shaft bushing 210 is formed into the shape and gradient as required by the user.
Referring to FIG. 4, it is an assembly view of a rotating shaft according to the first preferred embodiment of the present invention. The shaft 220 passes through and is accommodated within the shaft bushing 210, with the shaft head 221 bearing against the outer edge of the front end of the shaft bushing 210A, the shaft middle section 222 being accommodated within the shaft hole 214, and the shaft tail 223 protruding from the back end of the shaft bushing 210B.
Referring to FIGS. 5A and 5B, they are respectively an assembly view of connecting the louver to the frame and a cross-sectional view of the connection according to the first preferred embodiment of the present invention. The shaft bushing 210 and the shaft 220 are combined to form a rotating shaft, and they are respectively inserted into the frame mounting hole 511 of the frame 510 and the louver mounting hole 521 of the louver 520. At this time, the gripping portion 213 bears against the inner side of the frame mounting hole 511, and the gradient design of the ramps of the gripping portion 213 enhances the force for bearing against the frame mounting hole 511, thus fixing the shaft bushing 210. Furthermore, such gradient design prevents the changing of the aperture of the frame mounting hole 511 as a result of the heat expand and cold contract effect of the frame 510, which causes that the shaft bushing 210 cannot be sleeved.
As described above, the outside diameter of the front end 210A of the shaft bushing is made to be smaller than that of the back end 210B of the shaft bushing, thus, when the frame mounting hole 511 is opened, its aperture is set to be between the outside diameters of the front and back ends of the shaft bushing 210. Therefore, even if the aperture of the frame mounting hole 511 contracts or expands as a result of the frame 510 being heated or cooled, the aperture does not exceed the range between the outside diameters of the front and back ends of the shaft bushing 210, thus, the shaft bushing 210 still can be easily inserted into the frame mounting hole 511.
The shaft tail 223 is inserted into the louver mounting hole 521 of the louver 520, and at this time, the fin 224 bears against the outer edge of the louver mounting hole 521, so as to enhance the effect of fixing the louver 520. The louver 520 is fixed and positioned on the frame 510 by using the two fixing methods together.
Referring to FIGS. 6A and 6B, they are structure diagrams of components according to a second embodiment of the present invention. A trigonal shaft bushing 230 and a shaft 220 are included, wherein the shaft 220 also passes through and is accommodated within the trigonal shaft bushing 230. The trigonal shaft bushing 230 includes a trigonal shaft bushing body 231, a trigonal shaft bushing flange 232, a plurality of trigonal gripping portions 233, and a shaft hole 234 of the trigonal shaft bushing. In this embodiment, the top portions of the two ramps of trigonal gripping portions 233 are connected to form an angle of 60 degrees, and the trigonal gripping portions 233 are protruded from the outer edge of the middle section of the trigonal shaft bushing body 231 and symmetrically about the shaft center of the trigonal shaft bushing body 231.
However, the difference from the shaft bushing 210 shown in FIG. 2A lies in that: the bottom parts of the trigonal gripping portion 233 are not connected. From the appearance, it is similar to the conventional way of disposing the fin, but the effect that is produced is quite different. Generally, when the fin is disposed, from the cross-sectional view, the top and bottom parts are of the same width, which is quite small, so the fin is easily cracked under an external force. However, the cross-section of this trigonal gripping portion 233 is wedge-shaped, and when the top edge bears against the inner side of the frame mounting hole 511, the force is distracted from the ramp of the trigonal gripping portion 233 to the trigonal shaft bushing body 231. Then, the cylindrical shape of the trigonal shaft bushing body 231 is utilized to distract and counteract the force transferred by each trigonal gripping portion 233. Furthermore, the bottom part of the trigonal gripping portion 233 is connected to the trigonal shaft bushing body 231 and has a width being much larger than that of the top edge. Even if the side surface is applied with an external force, the external force can be distracted via the gradient design of the trigonal gripping portion 233, thus, the trigonal gripping portion 233 is not easily deformed, cracked, or abrased.
Referring to FIGS. 7A and 7B, they are a side view and a front view of the trigonal shaft bushing according to the second embodiment of the present invention. As shown in the figures, the outside diameter of the front end 230A of the trigonal shaft bushing is also made to be a little smaller than that of the back end 230B of the trigonal shaft bushing, so as to form a slight gradient difference. As seen from the perspective of the front end of the trigonal shaft bushing 230, the trigonal gripping portion 233 is shaped like a gradually ascending hillside. As described above, this design is used to prevent the changing of the aperture of the frame mounting hole 511 as a result of the heat expand and cold contract, which causes that the shaft bushing cannot be sleeved, and the gradient design of the trigonal gripping portion 233 can be used to distract the force produced by bearing against the inner side of the frame mounting hole 511. However, the user also can adjust the trigonal shaft bushing body, such that the trigonal shaft bushing 230 forms into the required shape and gradient.
By utilizing the rotating shaft of the present invention, not only the frame mounting hole is prevented from being damaged due to the poor fixing effect of the rotating shaft, but also the louver is positioned on the frame of the shutter quickly and firmly, and it is convenient for both mounting and detaching, so as to simplify the assembling process and enhance the production efficiency, thus having obvious advantage and great practical value.
The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Patent Application
20080092444
