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Small pump

A small pump and pump chamber technology, applied in the direction of pumps, pumps with flexible working elements, liquid variable capacity machines, etc., can solve problems such as the influence of pressurization time, function reduction, air leakage, etc. The function of high-efficiency valve, the effect of preventing noise

Inactive Publication Date: 2009-01-21
MITSUMI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in order to eliminate this noise, it is also considered to form a rough pockmark on the diaphragm, but this will cause air leakage, which will affect the pressurization time and cause a decrease in function.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Below, according to Figure 1 to Figure 10 An embodiment of the present invention will be described.

[0042] figure 1It is a vertical sectional view of a small pump. In this small pump 1, diaphragms 4, 4 forming pump chambers 3, 3 are provided in a rectangular housing 2 viewed from above. Hollow mounting bodies 5, 5 protrude downward, and oscillating bodies 6 for moving the lower surfaces of the diaphragms 4, 4 up and down are provided below the diaphragms 4, 4.

[0043] In addition, the casing 2 is made into three sections: an upper casing 2a, a middle casing 2b and a lower casing 2c. In the diaphragms 4, 4, the flanges 4a, 4a... ... are sandwiched between the above-mentioned upper case 2a and the above-mentioned middle case 2b and held by the case 2 .

[0044] Furthermore, on the oscillating body 6, in the vicinity of the periphery of the oscillating body 6, and below the central parts of the respective diaphragms 4, 4, an upwardly protruding shaft body 7, 7 is pr...

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Abstract

The objective is to prevent noise of a small pump and improve performance of the small pump. Recess grooves 19, 19..., 20, 20..., 21, 21... or hollows 22, 22..., 23, 23... are scored on an intake valve element 8 opening and closing an intake valve part V1 of the small pump 1 or an upper surface of a rocking body 6 pressed against a back surface of the intake valve element to reduce contact area of the intake valve element 8 and the upper surface of the rocking body 6. Consequently, adhesion of the intake valve body 8 and the rocking body 6 is prevented to reduce noise at a time of open and close of the intake valve element 8.

Description

technical field [0001] The present invention relates to a small pump used in a sphygmomanometer and the like, and particularly relates to a small pump in which noise is prevented. Background technique [0002] In the existing small-sized pump, a pump chamber is formed in the housing, and the pump chamber is formed by a plurality of diaphragms, and each diaphragm is connected to each other as a whole. In addition, an oscillating body for moving the lower surface of the diaphragm up and down is provided under the diaphragm. [0003] Furthermore, a through hole is opened in the central part of the lower surface of the diaphragm respectively, and the suction valve body with the through hole is formed integrally with the lower surface of the diaphragm. On the other hand, the respective diaphragms are fixed to the oscillating body while an air introduction hole communicating with the through hole of the diaphragm is opened near the periphery of the oscillating body. In addition,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B45/04
Inventor 山川宗春
Owner MITSUMI ELECTRIC CO LTD
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