43results about How to "Stable extrusion force" patented technology

An embodiment of the invention relates to a photoelectric detection device and a physiological information detection device. The photoelectric detection device comprises a supporting part, a light receiving component, light emitting components and a light permeable part. The light receiving component and the light emitting components are arranged on the supporting part, and the light emitting components are positioned around the light receiving component. The light permeable part is positioned on the supporting part, externally covers the light receiving component and the light emitting components, allows light emitted by the light emitting components to permeate to reach a detected object and allows light reflected by the detected object to permeate. A shell surface, contacting with the detected object, of the light permeable part comprises a convex light permeable curved surface and a light permeable plane at the top of the light permeable curved surface. A shell surface, contacting with the detected object, of the supporting part comprises push contact portions, the push contact portions are isolated from the light permeable part and positioned around the light permeable part, and a height H1 of the light permeable part in the vertical direction and a height H2 of the push contact portions of the supporting part in the vertical direction meet a condition of H1>H2>0. The photoelectric detection device and the physiological information detection device have advantages that wearing comfort of human bodies can be improved, and discomfort is avoided.

The invention relates to the technical field of fluid pumps, and discloses a low-loss peristaltic pump, which includes a pump head, a driver and a hose. tube, and the inner cavity of the extruded tube is covered with a hose and an extruded ball. The low-loss peristaltic pump, due to the randomness of the extrusion ball cutting angle, the mutual extrusion surface between the moving hose and the extrusion ball is also random, the extrusion ball is relatively uniform in pressure, and the material fatigue caused by bending The wear and tear are evenly distributed on the surface of the hose, its service life is greatly improved, and its elastic properties can also be kept unchanged for a longer working time to maintain stable operation. Secondly, the hose, squeeze tube and squeeze ball The size parameters of the hose are fixed, and the extrusion force between the hose and the extrusion ball is relatively stable. At the same time, because the extrusion ball is deformable, it will also absorb excessive pressure, and the bending degree of the hose is always kept in a reasonable range. Inside.

The invention relates to the field of medical devices, and particularly discloses an ambulance stretcher ladder board. The ambulance Stretcher ladder board comprises a ladder board body, an air cylinder and an air compressor. One end of the ladder board body is hinged to an ambulance bottom plate through an articulated shaft; the cylinder body of the air cylinder is hinged to the ambulance bottomplate, and a push arm hinged to a piston rod of the air cylinder is fixed to the ladder board body; two parallel slide rails are arranged on the surface of the ladder board body , multiple limiting units are arranged between the slide rails, and each limiting unit comprises a nozzle, a limiting plate and a limiting edge which are arranged from the hinged end to the free end in sequence; the ladderboard body is provided with a notch in which the nozzles are arranged; one end of each limiting plate is hinged to the two side walls of the notch, the limiting plates can cover the nozzles, and theair compressor and the nozzles are communicated through solenoid valves; the free end of the ladder board body is provided with control parts located in the slide rails, each control part comprises acontrol rod, a balance spring, a first press switch and a controller electrically connected to the solenoid valves, and the cylinder body of the air cylinder is provided with second press switches electrically connected to the controllers. Through the ambulance stretcher ladder board, the safety can be improved.