Plunger-type diaphragm valve

A plunger-type diaphragm valve, disposed in an accommodation trough of a flush device, the flush device having an inlet opening in a radial direction thereof, the inlet opening being in communication with the accommodation trough, the flush device having an outlet opening underneath the accommodation trough, the flush device further having an inlet passage and an outlet passage corresponding to the inlet opening and the outlet opening respectively, the plunger-type diaphragm valve comprising:

• a control unit, having a first end and a second end, the control unit being formed with a first guide hole in a radial direction thereof, the first end of the control unit being formed with at least one second guide hole, the second guide hole being in communication with the first guide hole, the second end of the control unit being able to lean against a bottom of the accommodation trough for blocking the inlet passage and the outlet passage;
• a diaphragm member, disposed at the first end of the control unit, an outer wall of the diaphragm member being fixed to a wall of the accommodation trough, enabling the accommodation trough to form a first accommodation room and a second accommodation room, the diaphragm member having at least one curved portion, the diaphragm member being formed with a third guide hole corresponding to the second guide hole, the diaphragm member being flexible;
• an engaging member, disposed on top of the diaphragm member to secure the diaphragm member;
• a drain member, coupled to a top end of the first accommodation room to form a chamber among the drain member, the diaphragm member and the engaging member, the chamber being in communication with the second guide hole;
• in response to the plunger-type diaphragm valve being actuated, the curved portion of the diaphragm member being deformed by water pressure to bring the control unit to move toward the chamber for the inlet passage to communicate with the outlet passage, by the engaging member securing the diaphragm member so as to render the outer wall of the diaphragm member fixed to the wall of the accommodation trough;
• the control unit comprising a seat;
• the seat having a through hole corresponding to the outlet opening;
• the seat being provided with a swash rubber member to surround the seat;
• the swash rubber member being able to lean against the bottom of the accommodation trough;
• the control unit further comprising a control disk;
• the control disk having a flange at a top rim thereof;
• a bottom of the control disk being provided with a connecting block corresponding to the through hole;
• the connecting block being formed with a locking hole;
• the control disk being formed with the first guide hole and the second guide hole;
• an outer wall of the control disk being provided with a filter screen;
• the filter screen being located between the flange and the seat;
• the control unit further comprising a plug;
• one end of the plug being inserted through the swash rubber member and the through hole and locked to the locking hole;
• and
• another end of the plug extending out of the outlet opening.