Patent ID: 7610709

Claim:
An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel ( 102 ) of the hand-gun, said barrel ( 102 ) being mounted in a breech block ( 110 ), and a sensor element ( 123 ), which is biased at least indirectly in the direction of the longitudinal axis ( 143 ) of the barrel ( 102 ), is located in the breech block ( 110 ) and comprises in the region of one end thereof at least indirectly a contact surface ( 121 ) for making contact with part of a cartridge ( 101 ) and assumes a position in relation to the breech block ( 110 ) when a cartridge ( 101 ) is present in the barrel ( 102 ) which differs from the position thereof assumed in the absence of a cartridge ( 101 ) in the barrel ( 102 ) and the sensor element ( 123 ) interacts at least indirectly with a safety mechanism ( 141 ) provided on the grip of the hand-gun in order to prevent dismantling of the breech block ( 110 ) when a cartridge ( 101 ) is present in the barrel ( 102 ) of the hand-gun wherein the sensor element is in the form of a guide pin which is biased at least indirectly in the direction of the longitudinal axis of the barrel and is slidably mounted in a bearing in the breech block, and one end of the guide pin at least indirectly abuts a contact surface for making contact with part of a cartridge and the guide pin ( 123 ) comprises a bearing surface ( 124 ) for functioning coactively with a pressure piece ( 131 ), which is biased by a spring ( 130 ) and which urges the indicator element ( 120 ) and thus the contact element ( 122 ) in the direction of the longitudinal axis of the barrel ( 102 ).