1. Technical Field
Embodiments of the present disclosure generally relate to rotary devices, and particularly to a rotary device having a rotary mechanism.
2. Description of Related Art
Commonly, a rotary device includes a first member, a second member, and a hinge connecting the first member to the second member. The hinge is often composed of resilient members and cams. The first member is thus rotatable with respect to the second member. However, restoring forces of the resilient members may be weakened after repeatedly rotating the first member with respect to the second member, thus the reliability of the rotary device decreases with use.
Therefore, improved rotary devices are needed to address the aforementioned deficiencies and inadequacies.
Referring to
Referring to
The second member 300 is similar with the first member 200. The second member 300 includes a base portion 310, two second protruding posts 330 substantially perpendicular to the base portion 310. A second mounting hole 350 is defined in the base portion 310 and between the two second protruding posts 330.
The rotary mechanism 400 includes a shaft 450, a first magnetic body 440, a washer 430, and a second magnetic body 420. The shaft 450 is cylindrical and the two ends of the shaft 450 are configured to be rotatably inserted into the first mounting hole 250 and the second mounting hole 350 correspondingly, thus the first member 200 is rotatable with respect to the second member 300. The first magnetic body 440, the washer 430, and the second magnetic body 420 are sleeved on the shaft 450. The washer 430 is sandwiched between the magnetic bodies 440, 420.
The first magnetic body 440 is disk-shaped and attached to the first member 200. The first magnetic body 440 defines two fixing holes 442 configured for engageably receiving the first protruding posts 230, correspondingly, as a result the first magnetic body 440 can be fastened to the first member 200, and rotating the first member 200 drives the first magnetic body 440 to rotate. A through hole 444 is defined in the first magnetic body 440 and between the two fixing holes 442 for allowing the shaft 450 to pass through the first magnetic body 440.
The second magnetic body 420 is disk-shaped and attached to the second member 300. The second magnetic body 420 defines two fixing holes 422 configured for engageably receiving the two second protruding posts 330 correspondingly, as a result the second magnetic body 420 can be fastened to the second member 300. A through hole 424 is defined in the second magnetic body 420 and between the two fixing holes 422 for allowing the shaft 450 to pass through the second magnetic body 420. Corresponding surfaces of the first magnetic body 440 and the second magnetic body 420 have different polarities.
The washer 430 defines a through hole 432 configured for allowing the shaft 450 to pass through.
In use, an external rotating force is applied to the first member 200, as a result the first member 200 will drive the first magnetic body 440 to rotate clockwise or counter-clockwise to any angle (referring to
Moreover, the washer 430 sandwiched between the first magnetic body 440 and the second magnetic body 420 can decrease friction between the first magnetic body 440 and the second magnetic body 420 when the first member 200 rotates with respect to the second member 300. Therefore, the reliability and work life of the rotary device 99 are further improved.
It is to be understood, however, that even though numerous information and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the present embodiments, the disclosure is illustrative only; and that changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the present embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Number | Date | Country | Kind |
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200810300663.X | Mar 2008 | CN | national |