Electronic endoscope light source light path control system

Abstract

The invention discloses an electronic endoscope light source optical path control system. Inside a light source housing, and from the front to the back, a light source, a light condensing lens group and a mechanical diaphragm are arranged. The mechanical diaphragm is provided with a base. The base is provided with a first light aperture. One side of the base is provided with a cover plate. The cover plate is provided with a second light aperture at a position rightly opposite to the first light aperture. The inner cavity of the base is provided with a first light blocking sheet and a second light blocking sheet that are lined in parallel. The two light blocking sheets move in opposite directions when driven by a stepping motor. The insertion hole at a light guiding part connection base is divided into three sections referred as the front section, the middle section and the back section. The front section is internally embedded with a linear bearing; and the inclined front part of the linear bearing is provided with a second optical-electric switch. Simple and compact in structure and low in cost, the system of the invention has a small requirement of the torque of a motor and can adjust the magnitude of the light according to the requirement at high regulation precision and good reliance. With the system, it is possible to realize that before the light guiding part of the endoscope is inserted, the mechanical diaphragm is always kept in a closed state so as to avoid the damage to the eyes of an operator.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an electronic endoscope light source light path control system. Background technique [0002] Electronic endoscope system is more and more widely used in medical inspection and operation, and the light source provides continuous lighting and air pressure device for the system during inspection or operation. The lighting system in it provides lighting for image acquisition at the front end of the mirror body. According to the actual inspection or operation, lighting with different brightness is required to cooperate. Therefore, it is necessary to manually or automatically adjust the light amount of the cold light source. For the optical path control system of the electronic endoscope light source, the current representative technical solutions are: [0003] A case of a light source light adjustment structure (US06629925), which is controlled by a motor. When t...

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Problems solved by technology

This solution also has a relatively large torque on the motor, and the light adjustment accuracy is not high

[0005] Aiming at light-blocking protection measures, the current existing solution is a mechanical structure (CN 20141058145), which utilizes the elastic effect of springs or shrapnel itself. When the light-guiding insertion part is inserted, the light-blocking sheet is pushed away; Automatic reset under the lower position, blocking the optical path, this solution increases the structural cost, and the assembly process is relatively complicated

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