Pressure-type contact switch for use in operation of pressure pump

Pressure-type contact switch comprising:

• a bourdon tube (10) which expands and contracts depending on water pressure in a discharge conduit (2) applied by a pressure pump (P);
• a link (23) having an end connected to a free end (11) of said bourdon tube (10);
• a first actuating lever (20) having an end connected to the other end of said link (23) and rotatably installed about a first rotation axis (21);
• a first semi-circle gear (20a) formed at the other end of said first actuating lever (20);
• a first link gear (32) engaged with said first semi-circle gear (20a) and fitted to a central rotation axis (30) to thereby cause said central rotation axis (30) to rotate in normal and reverse directions;
• a rotation member (40) fitted to said central rotation axis (30);
• a second actuating lever (50) which is installed to said rotation member (40) to be rotatable about a second rotation axis (52);
• an extension lever (53) fitted to an end of said second actuating lever (50), wherein a rotation of said extension lever (53) in normal and reverse directions is limited by a movable support rod (45) and a stationary support rod (46);
• a second semi-circle gear (50a) formed at the other end of said second actuating lever (50);
• a holder (62) fitted to an upper end of a third rotation axis (55) and having a rotation magnet (60) inserted therein;
• a second link gear (56) fitted to a lower end of said third rotation axis (55) and engaged with said second semi-circle gear (50a) to thereby rotate said third rotation axis (55) in normal and reversed directions depending on the rotation of said second semi-circle gear (50a);
• a movable magnet (70) arranged to be aligned with said rotation magnet (60) in a straight line when said rotation magnet (60) stops in its rotation by a first stopper (49), wherein the pressure pump (P) turns off due to repulsive force between said rotation magnet (60) and said movable magnet (70);
• and,
• a stationary magnet (75) arranged to be aligned with said rotation magnet (60) in a straight line when said rotation magnet (60) stops in its rotation by a second stopper (48), wherein the pressure pump (P) turns on when the stationary magnet (75) is aligned with the rotation magnet (60).