Abstract: The present invention relates to a combustion nozzle for a gas lighter, particularly a nozzle structure provided with an internal, automatic flame extinguishing device. Within a nozzle cylinder is disposed a second valve for closing a to-be-closed portion under the action of a shape memory member. The second valve is provided with a push-back portion which undergoes an elastic deformation upon closing of the to-be-closed portion and thereby urge the shape memory member in a direction in which the shape memory member is pushed back. This structure permits omission of a return spring and hence reduction in the number of components used; besides, the shape memory member such as, for example, a shape memory alloy coil, can revert to its original shape to a sufficient extent even without imparting a bidirectional property thereto.

Abstract: A valve for a cigaret gas lighter is comprised of a flexible gas conduit extending between a nozzle and a gas tank. The flexible gas conduit is pinched or bent to close the conduit. An operating member pinches or bends the gas conduit to close the conduit by a spring. A manually operable lever is provided to open the conduit by removing the operating member overcoming the spring force. In a preferred embodiment of the invention, the conduit is positively opened in addition to removal of the operating member when the gas lighter is to be ignited.