Door lock device for refrigerator and freezer

A door lock device for a door of a refrigerator and freezer, the device comprising:

• a case 10 having an inner case 11 fixed to the door by means of bolts, a base plate 14 fixed to the underside of the inner case 11 by means of bolts in such a manner as to close the interior of the inner case 11, fixing frames 12 formed on both side surfaces of the inner case 11 and having fixing protrusions 12b protruding from the front portions thereof, a locking groove 12c formed at the inside of the rear portion of the inner case 11, and an outer case 16 having fixing grooves 16a formed at the inside thereof in such a manner as to allow the fixing protrusions 12b of the inner case 11 to be press-fitted thereto and a locking protrusion 16b formed on the inside of the rear portion thereof in such a manner as to be fixed to the locking groove 12c of the inner case 11;
• opening and closing means 20 having an outside handle 21 having an operating lever 22 disposed on the front portion thereof in such a manner as to be fixed on one end thereof to the inner case 11 by means of a hinge shaft, the other end of the outside handle 21 being extended to the rear portion of the outer case 16, and a latch 23 disposed between the inner case 11 and the base plate 14 in such a manner as to allow the operating lever 22 of the outer handle 21 to be brought into close contact with a hinge shaft H coupled to the rear portion thereof, so that the hinge shaft H and the latch 23 move backward to open the door;
• locking means 30 having a fixing plate 31 inserted into the inside of the rear portion of the base plate 14, pushing inducing protrusions 32 protruding upward from the rear portion of the fixing plate 31, a rotary cam 34 penetrated into the inside of the fixing plate 31 in such a manner as to allow the lower peripheral portion thereof to protrude from the underside of the base plate 14, rotary protrusions 35 formed on both sides of the front portion of the rotary cam 34 in such a manner as to allow the fixing plate 31 to be brought into close contact with the base plate 14, a locking groove 35a formed on the center of the rotary protrusions 35, a guide protrusion 35b extended forward from the locking groove 35a, a locking plate 36 fixed to the hinge shaft of the latch 23 and having a pressing portion 36a formed on the front portion thereof and a fixing portion 36b formed on the rear portion thereof in such a manner as to be brought into close contact with the locking groove 35a of the rotary cam 34 and escaped therefrom through the seesaw operation of the pressing portion 36a, a key spindle 38 and a key housing 39 coupled to the top plate of the outer case 16, and a locking protrusion 39a protruding from the underside of the key housing 39 in such a manner as to press and release the pressing portion 36a;
• and
• releasing means 40 having an inner handle 41 having a rotary shaft 42 inserted into the inside of the rotary cam 34 protruding from the underside of the base plate 14 in such a manner as to allow the rotary protrusions 35 of the rotary cam 34 to lift the fixing portion 36b of the locking plate 36 upward through the rotation of the inner handle 41 and to allow the fixing portion 36b to be escaped from the guide protrusion 35b, so that the rotary protrusions 35 of the rotary cam 34 push the pushing inducing protrusions 32 backward to release the locking state of the latch 23.