Patent Application
20080011564
The drawings disclose an illustrative embodiment of the present invention which serves to exemplify the various advantages and objects hereof, and are as follows:
The present invention may become more understandable if the following description is read with reference to the drawings. As showed from
The front portion 3 is affixed to the base portion 1. A slot 31 is provided on the top surface of the front portion 3. A perpendicular slot 32 perpendicular to the length of the slot 31 extends from the slot 31. A side portion 33 is provided on either side of the front portion 3.
The slide portion 4 is disposed on the underside of the front portion 3. At least one hole 41 is provided in the slide portion 4. A positioning rod 42 passes through the hole 41 and the slot 31 so as to guide the motion of the slide portion 4. A first hook member 43 is disposed on either side of the slide portion 4. A hole 44 is provided on the rear side of the slide portion 4.
The rear portion 5 is disposed behind the rear part of the front portion 3 and is affixed to the base portion 1. A second hook member 51 is disposed on either side of the rear portion 5.
Either of the two spring members 6 is a pull-resisting spring. The two ends of either of the two spring members 6 are connected with a first hook member 43 and a second hook member 51.
The damping unit 7 includes a pneumatic cylinder. The damping unit 7 is fixedly disposed on the rear portion 5 and is connected with the slide portion 4. The damping unit 7 comprises a cylindrical portion 71, a front hole 711, a rear cap 72, a gasket 73, a rod 74, a piston 75 and an anti-leakage rubber member 76. The cylindrical portion 71 is fixedly disposed on the rear portion 5 and forms an air chamber therein. The front hole 711 is provided at the front end of the cylindrical portion 71. The rear cap 72 is disposed at the rear end of the cylindrical portion 71. The gasket 73 is disposed inside the cylindrical portion 71. The rod 74 is disposed inside the cylindrical portion 71 and has a diameter slightly smaller than that of the front hole 711 so that the rod 74 may pass through the front hole 711 and then be inserted into the hole 44 of the slide portion 4. The piston 75 is disposed inside the cylindrical portion 71 and is connected with the rod 74. A plurality of outlets 754 are provided on the rear side of the piston 75. The anti-leakage rubber member 76 is disposed between the piston 75 and the gasket 73.
We will now elaborate on how the damping structure of the present invention works with reference to
Another embodiment of the damping unit 7 of the present invention is illustrated in
The embodiment may enhance the level of air-tightness of the damping unit 7 so that the fast backward motion of the slide portion 4 may be damped and slowed down more effectively when the slide portion 4 is moved backwards by the restoring force exerted by the two spring members 6.
The damping structure of the present invention has the following three advantages:
Although a preferred embodiment of the present invention has been described in detail hereinabove, it should be understood that the preferred embodiment is to be regarded in an illustrative manner rather than a restrictive manner, and all variations and modifications of the basic inventive concepts herein taught still fall within the scope of the present invention.
Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.
