Freon Refilling Apparatus for Vehicles

Abstract

A Freon refilling apparatus for vehicles comprises an outer shell and a tube fitting. The tube fitting is secured to a refilling duct, and one end of the tube fitting has a connection port. The apparatus also comprises an operating handle and a pushrod. One end of the operating handle is hinged to the tube fitting, and the other end is a press part. When the press part swings and gets close to the tube fitting, it drives the pushrod to move and open the gas cylinder. A confining plate is also hinged to the press part. The confining plate has an active contact part, while the outer shell has a passive contact part. The active contact part can lean against the passive contact part. The operating handle is locked when that happens.

What is claimed is: 
     
         1 . A Freon refilling apparatus for vehicles, comprising:
 an outer shell ( 1 );   a tube fitting ( 2 ) secured to the outer shell ( 1 ), one end of the tube fitting ( 2 ) having a connection port ( 21 ) capable of connecting with an outlet of a gas cylinder;   a refilling duct ( 3 ) secured to the tube fitting ( 2 ) and capable of connecting with air conditioners of vehicles;   an operating handle ( 4 ) and a pushrod ( 5 ) that movably plugs into the tube fitting ( 2 ), one end of the operating handle ( 4 ) is hinged to the tube fitting ( 2 ), and an other end is a press part ( 41 ) that is located alongside the tube fitting ( 2 ); and   a confining plate ( 6 ) hinged to the press part ( 41 ), the confining plate ( 6 ) having an active contact part ( 61 ), the outer shell ( 1 ) having a passive contact part ( 11 ) that is located between the press part ( 41 ) and the tube fitting ( 2 );   wherein when the press part ( 41 ) swings and gets close to the tube fitting ( 2 ), it drives the pushrod ( 5 ) to move and open the gas cylinder;   wherein the active contact part ( 61 ) is capable of leaning against the passive contact part ( 11 ); and   wherein the operating handle ( 4 ) locks when the active contact part ( 61 ) leans against the passive contact part ( 11 ).   
     
     
         2 . The Freon refilling apparatus for vehicles as claimed in  claim 1  wherein the first avoidance opening ( 12 ) is on the outer shell ( 1 ), the press part ( 41 ) stretches out of the first avoidance opening ( 12 ), the active contact part ( 61 ) is a free end of the confining plate ( 6 ), a long strip shaped clamping slot ( 62 ) is on an edge of the active contact part ( 61 ) in the lengthwise direction, the passive contact part ( 11 ) is a proximal edge of the first avoidance opening ( 12 ) that is proximal to the tube fitting ( 2 ), and the clamping slot ( 62 ) of the active contact part ( 61 ) can clamp the passive contact part ( 11 ). 
     
     
         3 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein a distal edge of the first avoidance opening ( 12 ) that is distal from the tube fitting ( 2 ) is the confining edge ( 13 ), and when the active contact part ( 61 ) leans against the passive contact part ( 11 ), a gap between the confining edge ( 13 ) and an outer wall of the operating handle ( 4 ) is smaller than a depth of the clamping slot ( 62 ). 
     
     
         4 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein the confining plate ( 6 ) is made of plastic, and the outer shell ( 1 ) has a thin-walled plastic structure. 
     
     
         5 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein there are connection columns ( 63 ) on both opposing side edges of the confining plate ( 6 ), the connection columns ( 63 ) are on a distal side edge distal from the clamping slot ( 62 ), the operating handle ( 4 ) is of a thin-walled structure with a cavity ( 42 ), the confining plate ( 6 ) is hinged to an inner wall of the cavity ( 42 ) through two connection columns ( 63 ), there are locating bosses ( 64 ) on both opposing side edges of the confining plate ( 6 ), the locating bosses ( 64 ) are on a proximal side edge proximal to the clamping slot ( 62 ), there are locating holes ( 43 ) on an opposite inner wall of the cavity ( 42 ), and when the active contact part ( 61 ) detaches from the passive contact part ( 11 ), the confining plate ( 6 ) is capable of swinging into the cavity ( 42 ) and the locating bosses ( 64 ) are capable of fitting into the locating holes ( 43 ). 
     
     
         6 . The Freon refilling apparatus for vehicles as claimed in  claim 5  wherein a thickness of the confining plate ( 6 ) tapers from an end with the clamping slot ( 62 ) to an other end. 
     
     
         7 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein there are connection columns ( 63 ) on both opposing side edges of the confining plate ( 6 ), the connection columns ( 63 ) are on a distal side edge distal from the clamping slot ( 62 ), the operating handle ( 4 ) is of a thin-walled structure with a cavity ( 42 ), the confining plate ( 6 ) is hinged to an inner wall of the cavity ( 42 ) through two connection columns ( 63 ), there are locating bosses ( 64 ) on both opposing side edges of the confining plate ( 6 ), the locating bosses ( 64 ) are on a proximal side edge proximal to the clamping slot ( 62 ), there are locating holes ( 43 ) on an opposite inner wall of the cavity ( 42 ), and when the active contact part ( 61 ) detaches from the passive contact part ( 11 ), the confining plate ( 6 ) is capable of swinging into the cavity ( 42 ) and the locating bosses ( 64 ) are capable of fitting into the locating holes ( 43 ). 
     
     
         8 . The Freon refilling apparatus for vehicles as claimed in  claim 4  wherein there are connection columns ( 63 ) on both opposing side edges of the confining plate ( 6 ), the connection columns ( 63 ) are on a distal side edge distal from the clamping slot ( 62 ), the operating handle ( 4 ) is of a thin-walled structure with a cavity ( 42 ), the confining plate ( 6 ) is hinged to an inner wall of the cavity ( 42 ) through two connection columns ( 63 ), there are locating bosses ( 64 ) on both opposing side edges of the confining plate ( 6 ), the locating bosses ( 64 ) are on a proximal side edge proximal to the clamping slot ( 62 ), there are locating holes ( 43 ) on an opposite inner wall of the cavity ( 42 ), and when the active contact part ( 61 ) detaches from the passive contact part ( 11 ), the confining plate ( 6 ) is capable of swinging into the cavity ( 42 ) and the locating bosses ( 64 ) are capable of fitting into the locating holes ( 43 ). 
     
     
         9 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein the operating handle ( 4 ) is curved, the second avoidance opening ( 44 ) is on the operating handle ( 4 ), there is a tube-connecting part ( 22 ) on an outer wall of the tube fitting ( 2 ), the tube-connecting part ( 22 ) connects with the tube fitting ( 2 ), an end of the filling duct ( 3 ) is secured on the tube-connecting part ( 22 ), and an other end of the filling duct ( 3 ) passes through the second avoidance opening ( 44 ). 
     
     
         10 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein the operating handle ( 4 ) is curved, the second avoidance opening ( 44 ) is on the operating handle ( 4 ), there is a tube-connecting part ( 22 ) on an outer wall of the tube fitting ( 2 ), the tube-connecting part ( 22 ) connects with the tube fitting ( 2 ), an end of the filling duct ( 3 ) is secured on the tube-connecting part ( 22 ), and an other end of the filling duct ( 3 ) passes through the second avoidance opening ( 44 ). 
     
     
         11 . The Freon refilling apparatus for vehicles as claimed in  claim 4  wherein the operating handle ( 4 ) is curved, the second avoidance opening ( 44 ) is on the operating handle ( 4 ), there is a tube-connecting part ( 22 ) on an outer wall of the tube fitting ( 2 ), the tube-connecting part ( 22 ) connects with the tube fitting ( 2 ), an end of the filling duct ( 3 ) is secured on the tube-connecting part ( 22 ), and an other end of the filling duct ( 3 ) passes through the second avoidance opening ( 44 ). 
     
     
         12 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein there is a connection part ( 23 ) on an outer wall of the tube fitting ( 2 ), an end of the operating handle ( 4 ) is hinged to the connection part ( 23 ), there is a push part ( 45 ) on the operating handle ( 4 ), there is an active push slope ( 46 ) on the push part ( 45 ), an end of the pushrod ( 5 ) stretches out of the tube fitting ( 2 ), there is a passive push slope ( 51 ) on the end of the pushrod ( 5 ), and the active push slope ( 46 ) leans against the passive push slope ( 51 ). 
     
     
         13 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein there is a connection part ( 23 ) on an outer wall of the tube fitting ( 2 ), an end of the operating handle ( 4 ) is hinged to the connection part ( 23 ), there is a push part ( 45 ) on the operating handle ( 4 ), there is an active push slope ( 46 ) on the push part ( 45 ), an end of the pushrod ( 5 ) stretches out of the tube fitting ( 2 ), there is a passive push slope ( 51 ) on the end of the pushrod ( 5 ), and the active push slope ( 46 ) leans against the passive push slope ( 51 ). 
     
     
         14 . The Freon refilling apparatus for vehicles as claimed in  claim 4  wherein there is a connection part ( 23 ) on an outer wall of the tube fitting ( 2 ), an end of the operating handle ( 4 ) is hinged to the connection part ( 23 ), there is a push part ( 45 ) on the operating handle ( 4 ), there is an active push slope ( 46 ) on the push part ( 45 ), an end of the pushrod ( 5 ) stretches out of the tube fitting ( 2 ), there is a passive push slope ( 51 ) on the end of the pushrod ( 5 ), and the active push slope ( 46 ) leans against the passive push slope ( 51 ). 
     
     
         15 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein a sealing groove ( 52 ) is on an outer peripheral wall of the pushrod ( 5 ), a sealing ring ( 53 ) is installed in the sealing groove ( 52 ), the sealing ring ( 53 ) presses against an inner peripheral wall of the tube fitting ( 2 ), and the connection port ( 22 ) is located between the connection port ( 21 ) and the sealing ring ( 53 ). 
     
     
         16 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein a sealing groove ( 52 ) is on an outer peripheral wall of the pushrod ( 5 ), a sealing ring ( 53 ) is installed in the sealing groove ( 52 ), the sealing ring ( 53 ) presses against an inner peripheral wall of the tube fitting ( 2 ), and the connection port ( 22 ) is located between the connection port ( 21 ) and the sealing ring ( 53 ). 
     
     
         17 . The Freon refilling apparatus for vehicles as claimed in  claim 4  wherein a sealing groove ( 52 ) is on an outer peripheral wall of the pushrod ( 5 ), a sealing ring ( 53 ) is installed in the sealing groove ( 52 ), the sealing ring ( 53 ) presses against an inner peripheral wall of the tube fitting ( 2 ), and the connection port ( 22 ) is located between the connection port ( 21 ) and the sealing ring ( 53 ). 
     
     
         18 . The Freon refilling apparatus for vehicles as claimed in  claim 2  wherein there is a sealing cone ( 24 ) on an inner wall of the tube fitting ( 2 ), a larger diameter end of the sealing cone ( 24 ) faces the connection port ( 21 ), a circular sealing block ( 54 ) is secured to the pushrod ( 5 ), a reset spring ( 55 ) is installed over the pushrod ( 5 ), an end of the reset spring ( 55 ) presses against the tube fitting ( 2 ), an other end of the reset spring ( 55 ) presses against the pushrod ( 5 ), and when the pushrod ( 5 ) is no longer subjected to a force from the operating handle ( 4 ), the sealing block ( 54 ) will press against the sealing cone ( 24 ) under a force from the reset spring ( 55 ). 
     
     
         19 . The Freon refilling apparatus for vehicles as claimed in  claim 3  wherein there is a sealing cone ( 24 ) on an inner wall of the tube fitting ( 2 ), a larger diameter end of the sealing cone ( 24 ) faces the connection port ( 21 ), a circular sealing block ( 54 ) is secured to the pushrod ( 5 ), a reset spring ( 55 ) is installed over the pushrod ( 5 ), an end of the reset spring ( 55 ) presses against the tube fitting ( 2 ), an other end of the reset spring ( 55 ) presses against the pushrod ( 5 ), and when the pushrod ( 5 ) is no longer subjected to a force from the operating handle ( 4 ), the sealing block ( 54 ) will press against the sealing cone ( 24 ) under a force from the reset spring ( 55 ). 
     
     
         20 . The Freon refilling apparatus for vehicles as claimed in  claim 4  wherein there is a sealing cone ( 24 ) on an inner wall of the tube fitting ( 2 ), a larger diameter end of the sealing cone ( 24 ) faces the connection port ( 21 ), a circular sealing block ( 54 ) is secured to the pushrod ( 5 ), a reset spring ( 55 ) is installed over the pushrod ( 5 ), an end of the reset spring ( 55 ) presses against the tube fitting ( 2 ), an other end of the reset spring ( 55 ) presses against the pushrod ( 5 ), and when the pushrod ( 5 ) is no longer subjected to a force from the operating handle ( 4 ), the sealing block ( 54 ) will press against the sealing cone ( 24 ) under a force from the reset spring ( 55 ).