Patent ID: 6340069
Filing Date: 2002-01-22
Classification: A01K,F04B

Abstract:
A sound elimination structure for an air pump comprising: a body (21), a compression cup (22), a vibration crank (23), and two anti-reverse structures (24), wherein, said body (21) is separated into an air inlet chamber (211) and an air outlet chamber (212) and has a first side provided with a washer (215) and a cover plate (216) and a second side provided with a lug (25), said air inlet chamber (211) is provided with an air input hole (2111) and an air inlet hole (213), said air outlet chamber (212) is provided with an air output hole (2121) and an air outlet hole (214), said vibration crank (23) has a first side secured on said compression cup (22) which is mounted on said lug (25) and a second side provided with a magnet (231) co-operating with an external electromagnetic device, each of said air input hole (2111) and said air output hole (2121) defines a recess for receiving an anti-reverse structure (24), the improvement comprising:said body (21) provided with a sound elimination device which comprises an air chamber box, and an air chamber cover, wherein, said air chamber cover is provided on one side of said body (21), and is separated by a plurality of baffles into a first chamber, a second chamber, a third chamber, and a fourth chamber, an air inlet guide hole defined in said first chamber and connecting to an external air extraction hole, an air inlet chamber air inlet hole defined in said second chamber and connecting to said air inlet chamber of said body, an air outlet chamber air outlet hole defined in said third chamber and connecting to said air outlet chamber of said body, an air conveying hole defined in said fourth chamber and connecting to an air outlet tube of said body, a guide hole defined between said first chamber and said second chamber; and said air chamber box is separated by a plurality of baffles into an air inlet cabin, a first circuitous chamber, a second circuitous chamber, and an air guide chamber, each of said first circuitous chamber and second circuitous chamber provided with a catch plate which is fitted in said air inlet chamber air inlet hole and said air outlet chamber air outlet hole, and a guide hole defined between said second circuitous chamber and said air guide chamber.