| 摘要 |
A press bar mechanism includes a latch bolt slidably attached to a housing, a pressing bar slidably attached to the housing and coupled to the latch bolt, a rod slidably received in the housing and coupled to the latch bolt, a casing disposed in the housing and having a compartment for receiving a spring member and a follower and having a helical groove communicating with the compartment of the casing, a guide pin secured to the follower and engaged in the helical groove of the casing for cushioning the movement of the follower relative to the casing and also for cushioning the pressing bar and for preventing the press bar from generating sounds or noises.
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