| 摘要 |
<p>A motor driven diaphragm pump comprises an electric motor (2) having mounted thereon a pump assembly (3). The pump assembly (3) comprises a body (4) formed by a first body part (4a) which is mounted on the motor (2) to support the pump assembly on the motor, and a second body part (4b). A crank shaft (5) having an eccentric portion (6) is mounted in the body by a bearing (7) and is coupled to the output shaft (8) of the motor. A multiplicity of pumping chambers (14) are defined between respective diaphragms (11) and covers (12). The diaphragms (11) are coupled to the crank shaft (5) by a coupling member (15) which is a unitary plastics moulding and comprises a hub which is received on the eccentric, a head which is connected to each diaphragm and a flexible connecting web which connects each head to the hub. The pump is particularly suitable for use as an inflation pump for an inflatable bladder forming part of a vehicle seat. <IMAGE></p> |
