Beam limiting device and X-ray machine

Abstract

The invention relates to a beam limiting device which comprises a plurality of optical filters, a substrate, a rotating platform and a driving assembly. The substrate is provided with a light outlet;the rotating platform is pivotally connected to one side of the substrate around the first axis, the multiple optical filters are distributed on the rotating platform at intervals around the first axis so as to be rotatable along with the rotating platform; the driving assembly is adjacent to the rotating platform, the driving assembly comprises a motor arranged on the substrate and a friction piece connected with a rotating shaft of the motor, the friction piece is kept to be compressed on the peripheral side wall of the rotating platform so that the motor can drive the friction piece to drive the rotating platform to rotate; in the rotating process of the rotating platform, multiple light filtering positions are included; when the rotating platform is located at the light filtering positions, the corresponding optical filters are located above the light outlet, and light sequentially passes through the corresponding optical filters and emits out from the light outlet. The friction piece and the rotating platform are in friction transmission. Noise generated during transmission can be effectively avoided, it is ensured that silence is kept during optical filter replacement, and therefore the clinic experience of a patient is improved. The invention further relates to an X-ray machine.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a beam limiter and an X-ray machine. Background technique [0002] X-rays are widely used in medical diagnosis because of their penetration, differential absorption, photosensitivity and fluorescence. For example, when X-rays pass through different parts of the human body, the X-rays are absorbed in different degrees in different parts of the human body, so the amount of X-rays passing through different parts of the human body is also different, so that the fluorescent effect or There is a big difference in the strength of the photosensitive effect, and then it can display shadows representing different densities. Medical personnel can diagnose the corresponding part of the human body according to the comparison of shadow shades and other diagnostic data. [0003] However, there are soft rays that are harmful to the human body in X-rays. In order to protect the heal...

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