| 摘要 |
A mechanically adjustable brake for use with a C-arm x-ray apparatus is generally comprised of a brake handle and an eccentric shaft support which, when rotated using the handle, actuates a cam and presses a brake pad into the C-arm. Movement of the C-arm is thus restricted when the brake is applied. The brake mechanism specifically includes a brake handle, a brake shaft, a cam mounted on the brake shaft, a plunger having a first end engaged with the cam and a second end having a brake. The brake handle is used to rotate the brake shaft and the cam, the cam pushes down on the plunger and the brake engages the C-arm. The brake mechanism further comprises a plunger support, a spring that is compressed when the brake is actuated and is decompressed when the brake is released thus permitting movement of the C-arm. The brake shaft is connected to the brake handle using an eccentric shaft support. The shaft support has an inner aperture having a center offset from the center of the outer perimeter and a plurality of parallel grooves in the outer perimeter of the shaft support that permit removal and advancement of the eccentric shaft support.
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