Diaphragm-type vacuum pump

Abstract

The present invention relates to a diaphragm-type vacuum pump that is compact in size and manufactured at low cost and includes an inclined pin that is radially spaced at a predetermined distance from the rotational center of a motor and turns around the rotational center, a rolling plate that is connected with the inclined pin and eccentrically shakes up and down, and a three-point diaphragm that is combined with the rolling plate and changes the internal volume by eccentrically shaking up and down, in which vacuum pumping is applied by repeating intake and exhaust of air according to changes in the internal volume of the three-point diaphragm.

1 . A diaphragm-type vacuum pump comprising:
 an inclined pin that is radially spaced at a predetermined distance from the rotational center of a motor and is configured to rotate around the rotational center;   a rolling plate that is connected with the inclined pin and is configured to eccentrically move up and down; and   a three-point diaphragm that is combined with the rolling plate and disposed between a diaphragm guide and an air port,   wherein vacuum pumping is applied by repeating intake and exhaust processes according to changes in the internal volume of the three-point diaphragm.   
   
   
       2 . The diaphragm-type vacuum pump of  claim 1 , further comprising: a boss that protrudes from the center of the diaphragm guide and is configured to contact a middle portion of the rolling plate that moves upward and downward. 
   
   
       3 . The diaphragm-type vacuum pump of  claim 1 , further comprising: guide rings inserted in the air port and are configured to prevent an outer wall of the three-point diaphragm from deforming. 
   
   
       4 . The diaphragm-type vacuum pump of  claim 3 , wherein the outer wall of the three-point diaphragm is in contact with the wall of the diaphragm guide. 
   
   
       5 . The diaphragm-type vacuum pump of  claim 3 , wherein the guide ring prevents the outer wall of the three-point diaphragm from deforming during the intake process by pressing the outer wall of the three-point diaphragm against the wall of the diaphragm guide. 
   
   
       6 . The diaphragm-type of vacuum pump of  claim 1 , further comprising:
 a boss that protrudes from the center of the diaphragm guide and is configured to contact a middle portion of the rolling plate that moves upward and downward, so that the rolling plate is prevented from being sucked up in the intake process of the three-point diaphragm.   
   
   
       7 . A diaphragm-type vacuum pump comprising:
 a pin that is radially spaced at a predetermined distance from the rotational center of a motor and is configured to rotate about the rotational center, the pin provided to have a slope relative to the rotational center;   a rolling plate that is connected with the inclined pin and is configured to move vertically; and   a diaphragm that is combined with the rolling plate and disposed between a diaphragm guide and an air port,   wherein vacuum pumping is applied according to a change in the internal volume of the diaphragm.   
   
   
       8 . The vacuum pump of  claim 7 , wherein the diaphragm is a three-point diaphragm. 
   
   
       9 . The vacuum pump of  claim 1 , further comprising:
 a boss that protrudes from a middle portion of the diaphragm guide and is configured to contact a middle portion of the rolling plate as the rolling plate moves vertically.   
   
   
       10 . The vacuum pump of  claim 9 , wherein the boss is configured to prevent the rolling plate from being sucked up in the intake process of the diaphragm. 
   
   
       11 . The vacuum pump of  claim 7 , further comprising:
 guide rings inserted in the air port, the guide rings being configured to prevent the diaphragm from deforming.   
   
   
       12 . The vacuum pump of  claim 11 , wherein the guide ring prevents an outer wall of the diaphragm from deforming during the intake process by pressing the outer wall of the three-point diaphragm against the wall of the diaphragm guide.