Pressure sensing switch
A technology for sensing switch and pressure, applied in the field of medical equipment, can solve the problems of filter membrane damage, human blood pollution, etc., and achieve the effect of preventing pollution
Inactive Publication Date: 2008-12-31
SHANGHAI DAHUA MEDICAL APP
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Problems solved by technology
[0003] The purpose of the patent of the present invention is to provide a pressure sensing switch, which solves the problem that the filter membrane is damaged when the air filter is used to detect the pressure of the human body and the human blood is polluted.
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[0008] The patent of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0009] A pressure sensing switch such as figure 1 As shown, the pressure sensor switch is a cavity composed of an upper cover 3 provided with an input channel 4 and a lower cover 1 provided with an output channel 5. A negative pressure film 2 is arranged in the cavity. The negative pressure film 2 covers the input hole 6 at the end of the input channel when subjected to reverse hydraulic pressure.
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The invention relates to a pressure sensitive switch which is characterized in that: the pressure sensitive switch is a cavity which is composed of an upper cover provided with an input channel and a lower cover provided with an output channel, and the cavity is internally provided with a negative pressure film which covers an input port at the end of the input channel when receiving reverse hydraulic pressure. The pressure sensitive switch of the invention has the advantages that: not only the blood pressure of human bodies can be measured, but also pollution to the blood of the human bodies caused by the external environment can be prevented effectively.
Description
technical field [0001] The patent of the present invention relates to the relevant technical field of medical equipment, especially a pressure sensor switch. Background technique [0002] After the pressure sensor switch is connected with the blood channel, it can effectively detect the blood pressure of the human body during the extracorporeal circulation of the blood, and effectively prevent the pollution of the external environment. At present, when detecting the pressure of the human body during extracorporeal circulation of blood in China, the air filter is mainly used to connect with the machine. The disadvantage of this method is that it will pollute the human blood when the filter membrane is damaged. Contents of the invention [0003] The purpose of the patent of the present invention is to provide a pressure sensing switch, which solves the problem that the filter membrane is damaged when the air filter is used to detect the pressure of the human body and the blo...
Claims
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Inventor 陈华
Owner SHANGHAI DAHUA MEDICAL APP