Liftable hinge mechanism, reciprocating engaging mechanism and related airtight device for preventing gaseous matter from leakag

An airtight device of preventing gaseous matter from leakage, comprising:

• a housing;
• a cover movably assembled with the housing;
• and
• a liftable hinge mechanism connected to the housing and the cover, the liftable hinge mechanism comprising:
• a base disposed on the housing and having a narrow slot;
• a connecting component connected to the cover and having an axle hole;
• and
• a pin slidably passing through the narrow slot and rotatably inserting into the axle hole, multi-dimensionally liftable motion of the connecting component relative to the base being generated via a movement of the pin inside the narrow slot and the axle hole, so as to seal the housing by the cover for preventing the gaseous matter inside the housing from leakage.

A reciprocating engaging mechanism, comprising:

• a shaft;
• a rotary plate rotatably disposed on the shaft;
• a first engaging component;
• and
• a linkage module connected between the rotary plate and the first engaging component, rotation of the rotary plate driving the linkage module to move and switch the first engaging component between a locking mode and an unlocking mode.

An airtight device of preventing gaseous matter from leakage, comprising:

• a housing;
• a cover movably assembled with the housing;
• and
• a reciprocating engaging mechanism adapted to constrain a movement of the cover relative to the housing, the reciprocating engaging mechanism comprising:
• a shaft disposed on the cover;
• a rotary plate rotatably disposed on the shaft;
• a first engaging component;
• a second engaging component disposed on the housing;
• and
• a linkage module connected between the rotary plate and the first engaging component, rotation of the rotary plate driving the linkage module to move and switch the first engaging component between a locking mode and an unlocking mode, so as to tightly shelter the housing by the cover for preventing the gaseous matter inside the housing from leakage.