Abstract: In the thermosensor of the invention, both ends 21, 22 of an elastic member 2 are fixed to a body 1 in a state where the elastic member 2 is compressed in a longitudinal direction, to form the elastic member 2 into a convex curved shape, one end side of the convex curved shape is raised by a predetermined angle ?L? with respect to the body 1, a flexure angle of another end 22 of the convex curved shape is zero, the fixation of one end portion 21 of the elastic member 2 and the body 1 is conducted via a fusible material 3, and a melting point or a softening point of the fusible material 3 is an operating temperature.

Abstract: In the thermoprotector of the invention, an elastic movable conductor 3 is placed between stationary electrodes 21, 22 opposed in an insulation housing 1. One end of the elastic movable conductor 3 is fixed to one stationary electrode 21. The elastic movable conductor 3 is compressed in a longitudinal direction and elastically curved to cause a middle of the elastic movable conductor 3 to be contacted with the other stationary electrode 22. Another end portion of the elastic movable conductor 3 is face joined by a fusible material 4 to the one stationary electrode 21 against a reaction force of the longitudinal direction compression. An insulation spacer 5 is disposed in the insulation housing 1. The insulation spacer forms a space for housing the other end portion of the elastic movable conductor 3 when the elastic movable conductor 3 is elastically released by melting of the fusible material 4.

Abstract: In the thermoprotector of the invention, an elastic movable conductor 3 is placed between stationary electrodes 21, 22 opposed in an insulation housing 1. One end of the elastic movable conductor 3 is fixed to one stationary electrode 21. The elastic movable conductor 3 is compressed in a longitudinal direction and elastically curved to cause a middle of the elastic movable conductor 3 to be contacted with the other stationary electrode 22. Another end portion of the elastic movable conductor 3 is face joined by a fusible material 4 to the one stationary electrode 21 against a reaction force of the longitudinal direction compression. An insulation spacer 5 is disposed in the insulation housing 1. The insulation spacer forms a space for housing the other end portion of the elastic movable conductor 3 when the elastic movable conductor 3 is elastically released by melting of the fusible material 4.

Abstract: In the thermosensor of the invention, both ends 21, 22 of an elastic member 2 are fixed to a body 1 in a state where the elastic member 2 is compressed in a longitudinal direction, to form the elastic member 2 into a convex curved shape, one end side of the convex curved shape is raised by a predetermined angle ?L? with respect to the body 1, a flexure angle of another end 22 of the convex curved shape is zero, the fixation of one end portion 21 of the elastic member 2 and the body 1 is conducted via a fusible material 3, and a melting point or a softening point of the fusible material 3 is an operating temperature.

Abstract: A thin thermal fuse is provided with a rush current resistance performance so as to be usable also as a current fuse. In a thermal fuse in which a low-melting fusible alloy piece 2 having an alloy composition containing 40 to 70% Bi is connected between a pair of flat lead conductors 1, 1, a flux 4 is applied to the low-melting fusible alloy piece 2, and the piece is sandwiched between a resin base film 31 and a resin cover film 32 to provide insulation, the resistance of the low-melting fusible alloy piece 2 is set so as to enable the low-melting fusible alloy piece 2 to be fused off also by Joule heat due to an allowable maximum current of a secondary battery.

Abstract: A thin type thermal fuse is structured by a resin base film, a pair of belt-shaped lead conductors, a low melting-point fusible alloy piece, flux and a resin cover film. Tip portions of the pair of belt-shaped lead conductors is fixed on the resin base film. The low melting-point fusible alloy piece is coupled between the tip end portions of the belt-shaped lead conductors. The flux applied on the low melting-point fusible alloy piece. The resin cover film which is disposed on a one surface of the resin base film so that a space between said films at peripheries of both the resin cover film and the resin base film is sealed and a space between the resin cover film and the belt-shaped lead conductors is sealed. In the thin type thermal fuse, a relation of (V/L).sup.1/2 /d.ltoreq.1.

Abstract: A thin type fuse of the present invention has a structure in which each tip portion of a pair of lead conductors is put out from one side of an insulating substrate film on to the other side thereof so as to keep watertightness, the tip portions of the lead conductors on the other side of the insulating substrate film are connected by a fuse element, and the other side of the insulating substrate film is covered with an insulating covering film which is in contact with the fuse element. The contact of the fuse element with the insulating covering film is surface contact and a flux is filled around said contact surface.