Super-miniature peristaltic pump

Abstract

The invention discloses a super-miniature peristaltic pump. The super-miniature peristaltic pump comprises a fixed part, a rotary part and a plurality of rolling balls, wherein the fixed part comprises a main body; an accommodating cavity and a hose keeping channel are arranged in the main body; the rotary part can be rotatably arranged in the accommodating cavity of the fixed part through a supporting limiting unit; the rotary part is provided with a ring-shaped slot which is formed in the peripheral direction and a linked connecting hole in the bottom; a rotary shaft linked connecting hole of a motor is connected to the rotary part; the rolling balls are arranged in the ring-shaped slot, and the rolling balls can rotate along with rotation of the rotary part, and can freely rotate on preset mounting positions of the rolling balls without dropping; and in a rotation process of the rotary part, at least one rolling ball can completely extrude a hose arranged in the hose keeping channel. The super-miniature peristaltic pump can avoid influences, on the size of the peristaltic pump, of a motor shaft size, favorably reduces the dimension of the peristaltic pump greatly, can reduce a friction moment among a pump tube and the rolling balls in a working process, reduces motor power requirements, and realizes super-miniature.

Description

technical field [0001] The invention relates to the technical field of peristaltic pumps, in particular to an ultra-miniature peristaltic pump. Background technique [0002] Peristaltic pump is a commonly used liquid delivery device, which has good stability in the process of liquid transportation, and is widely used in fields that require accurate quantitative and micro-flow liquid transportation. In some portable devices and handheld devices, the volume and performance requirements of the peristaltic pump are relatively high. The common roller peristaltic pumps currently on the market are generally bulky and difficult to meet the requirements. [0003] In contrast, the volume of the ball peristaltic pump is greatly reduced, and it has more excellent performance in the field of micro flow rate. However, limited by the size and performance parameters of the motor, even the new ball peristaltic pump is difficult to achieve a smaller volume. There are two main reasons for t...

AI Technical Summary

Problems solved by technology

However, limited by the size and performance parameters of the motor, even the new ball peristaltic pump is difficult to achieve a smaller volume

There are two main reasons for this: one is that the center of the rotating part of the peristaltic pump needs to be connected to the motor shaft, so as to realize the linkage between the rotating part and the motor shaft. The size of the rotating part connected to the motor shaft is difficult to reduce; at the same time, the motor shaft penetrates through the rotating part, causing the balls distributed on the rotating part to be far from the center position. At this time, the friction generated between the balls and the pump tube The torque of the motor is relatively large, and the driving force of the motor required for work is relatively large, resulting in a small-volume motor that cannot meet the power requirements.

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