Air pump, pump system, electronic blood pressure monitor, and massager
A technology of air pump and voltage application, which is applied in the direction of pneumatic massage, kneading massage equipment, massage auxiliary products, etc., and can solve the problem of large current consumption of the motor
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Embodiment 1
[0066] (outline of air pump)
[0067] Referring to FIG. 1A and FIG. 1B , the structure and principle of the air pump described in Embodiment 1 will be described. 1A and 1B are cross-sectional views showing the air intake and exhaust states of the air pump according to the first embodiment.
[0068] The air pump A has: an actuator member 1 described later that functions as a part or all of a diaphragm, housing members 2 and 3 provided on the suction (suction) side and discharge (exhaust) side of the actuator 1, and housing members 2 and 3 provided on the suction side. The first anti-reverse valve 4 on the casing member 2, the second anti-reverse valve 5 provided on the casing member 3 on the discharge side, and the spring 6 provided inside the actuator member 1.
[0069] The actuator 1 has an elastic body or a polymer body 1a that can expand and contract when a voltage is applied, and an electrode 1b provided to apply a voltage to the elastic body or the polymer body 1a. The ...
Embodiment 2
[0108] A schematic structure of the air pump described in Example 2 will be described with reference to FIG. 4A and FIG. 4B .
[0109] The main difference between the air pump B in Embodiment 2 and the air pump A in Embodiment 1 is that, as a restoration mechanism that generates a restoration force against contraction, it is arranged outside the actuator member 1 and connected to the actuator member 1. The U-shaped flexible members at the two ends of the spring replace the spring 6. The difference from Embodiment 1 will be mainly described below.
[0110] As shown in FIG. 4A, when the voltage applied to the actuator 1 is OFF, the actuator 1 rests at the position where the volume of the pump chamber 1c becomes the largest. In this state, since the pressure of the pump chamber 1c is substantially equal to that of the outside, the fluid sucked in from the suction portion 2a flows into the pump chamber 1c through the gap between the check valve 4 and the casing member 2 .
[011...
Embodiment 3
[0119] A schematic structure of the air pump described in Example 3 will be described with reference to FIG. 5A and FIG. 5B .
[0120] The difference between the air pump C in Embodiment 3 and the air pump A in Embodiment 1 is that it has: the housing members 12, 13 having a larger diameter than the outer diameter of the actuator; The spring 8 is an elastic member supported by the first casing member and the second casing member so as to cover the outer surface of the actuator member used in the restoring mechanism of the restoring force. Also, the main difference is that the spring 8 having a diameter larger than the outer diameter of the actuator member is provided between the outer case members 12 and 13 of the air pump C. As shown in FIG. The difference from Embodiment 1 will be mainly described below.
[0121] As shown in FIG. 5A, when the voltage applied to the actuator 1 is OFF, the actuator 1 rests at the position where the volume of the pump chamber 1c becomes the la...
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