| 摘要 |
A hose connecting device of a centralized vacuum suction system is provided to enable a connecting pipe to be smoothly closed by the self-weight or elastic force of a cover in order to prevent components from being damaged by excessive external force. A hose connecting device of a centralized vacuum suction system comprises a rear frame(110), a cover(120), a front frame(130), an adapter outer pipe(140) and an adapter inner pipe(150). The rear frame has a connecting pipe(111) and a recessed portion(112). The connecting pipe is connected to an inlet. The recessed portion exposes the end part of the connecting pipe to the outside. The cover is rotatably assembled with a hinge(118) of the recessed portion such that the connecting pipe is opened or closed. The front frame has an opening(132). The opening exposes the cover to the outside. The adapter outer pipe has an elastic unit(142). The elastic unit rotates the cover to an opening direction. The elastic unit is held by the rear frame elastically. The adapter outer pipe is inserted into the recessed portion through the opening. The adapter inner pipe is connected to the end part of a flexible hose.
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