Endoscope fluid switch-over device and endoscope

Abstract

The invention discloses an endoscope fluid switch-over device. An air inlet, an air outlet and an air port are formed in a valve body; a first coil is arranged in a mode of surrounding the exterior of one end of a valve element, and a second coil is arranged in a mode of surrounding the exterior of the other end of the valve element; and a first seal ring, which is used for blocking the air inlet or the air outlet, and a second seal ring, which is used for blocking the air port, are arranged on the valve element. The invention also discloses an endoscope, wherein the endoscope comprises a head end, an inserting part, an operating part, a light-guide part and a light source part; and the fluid switch-over device is located within the light source part. The fluid switch-over device provided by the invention is simple and compact in structure, small in volume, easy for assembling, low in production cost, high in sensitivity and good in reliability; by arranging the fluid switch-over device in the light source part, overall dimensions of the operating part can be effectively diminished and the weight of the operating part can be reduced, so that the endoscope is more convenient and labor-saving to operate; and meanwhile, by completely isolating gas conveying and water conveying actions, the danger of water conveying leakage is prevented, and influence to other electrical elements due to water leakage is avoided; therefore, the endoscope is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to an endoscope fluid switching device and an endoscope. Background technique [0002] The endoscope system is widely used in medical diagnosis. It is equipped with a device for sending air and liquid into the body cavity, and can send water, liquid medicine, air, etc. into the body cavity as required. In the prior art, the air supply and liquid delivery of the endoscope are controlled by a fluid switching valve arranged on the endoscope operating part, and the fluid switching valve is respectively provided with an air inlet, an air outlet, a liquid inlet and a liquid outlet , Many sealing rings isolate the valve cavity into several cavities. By pressing the button on the top of the switching valve to change the relative position of the isolated cavity and the above four inlets and outlets, the purpose of separating air and liquid is achieved. [0003] At pr...

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Problems solved by technology

[0007] like Figure 7 As shown, the above three types of air / water supply fluid switching valves P are all placed in the operating part, occupying the position in the inner cavity of the operating part, hindering the reduction of the volume of the operating part, and at the same time, the fluid switching valve also increases the weight of the operating part

In addition, the air / water fluid switching valve is placed in the inner cavity of the operating part. If the liquid inlet or outlet of the switching valve is not firmly connected with the water and gas pipe, the liquid will leak into the operating part, causing damage to the circuit board or other electrical parts in the operating part. influences

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