Device for connecting a gas-operated appliance and a gas cartridge

A device for connecting gas equipment on a valve of a gas cartridge, comprising:

• a body of a tap fixed to the gas equipment,
• an axial coupling ring fixed to the body of the tap and having at least one elastic lug which is intended to engage radially in an annular groove of a valve of the cartridge,
• a rotary locking ring, rotary in relation to the axial coupling ring, which is intended to occupy a locking position in which the rotary locking ring keeps each elastic lug engaged in the groove and a release position in which the rotary locking ring allows each elastic lug to be disengaged from the groove, and
• a cylinder having a tube which is intended to override the shut-off device of the valve, wherein the rotary locking ring has radial outwardly coupling means which are intended to interact with complementary radial coupling means provided on the gas cartridge valve, so that the rotary locking ring is intended to turn between the locking position and the release position by the rotation of the cartridge in relation to the connecting device.