A temperature-dependent switch with a housing, which comprises a cover part having an upper side and a lower part having a raised peripheral wall, the upper section of which is bent onto the upper side of the cover part and thereby holds the cover part on the lower part, wherein two contact surfaces are provided outside at the housing and a switching mechanism is arranged in the housing, wherein the switching mechanism is configured to switch, depending on its temperature, between a closed state, in which the switching mechanism establishes an electrically conductive connection between the two contact surfaces, and an open state, in which the switching mechanism interrupts the electrically conductive connection between the two contact surfaces. A sealing ring is arranged on the upper side of the cover part, which sealing ring is in sealing contact with the bent upper section of the wall.

The breaker 1 is provided with a fixed contact 20, a movable piece 4 extending in a first direction (D1), a thermally actuated element 5, a case 7 accommodating the movable piece 4 and the thermally actuated element 5, and a terminal piece 2 which partially protrudes outside the case 7 and is to be electrically connected with an external circuit. The terminal piece 2 has a first portion 21 and a second portions 22 having different heights from a bottom surface of the case 7, a first bent portion (23a) bent in a first bending direction, and a second bent portion (23b) bent in a second bending direction opposite to the first bending direction. The first bent portion (23a) and the second bent portion (23b) extend in parallel with the first direction (D1).

The breaker 1 is provided with a fixed contact 20, a movable piece 4 extending in a first direction (D1), a thermally actuated element 5, a case 7 accommodating the movable piece 4 and the thermally actuated element 5, and a terminal piece 2 which partially protrudes outside the case 7 and is to be electrically connected with an external circuit. The terminal piece 2 has a first portion 21 and a second portions 22 having different heights from a bottom surface of the case 7, a first bent portion (23a) bent in a first bending direction, and a second bent portion (23b) bent in a second bending direction opposite to the first bending direction. The first bent portion (23a) and the second bent portion (23b) extend in parallel with the first direction (D1).

A manufacture method of a concave disc-shaped structure of bimetal strip, particularly to one that is a coaxial positioning method of the guide hole which having elastic disc-shape structure bimetal strips not affected by external stress, which having a bimetal structure which outer edge will not be damaged and does not affect by stress while inner edge pulling closed to the outer edge, it includes: a bimetal strip, a lug, and an assembling jig, having two displaceable positioning holes, and use the guiding surface to make the two positioning holes gradually turn inside to condense to the combining surface of the lugs, so as to achieve the purpose of accurate positioning and combination.

A power plug includes a shell, an overheating protection module, a first wire, and a second wire. The overheating protection module includes a first pin, a second pin, a thermal circuit breaker, and a protective resistor. The thermal circuit breaker and the protective resistor are connected in parallel. A first end of the protective resistor is connected to one of the first pin or the second pin, and a second end of the protective resistor is connected to one of the first wire or the second wire. When temperature of the thermal circuit breaker is excessive, the thermal circuit breaker is disconnected, current continues to supply power to low-current electrical appliances through the protective resistor.

A power plug includes a shell, an overheating protection module, a first wire, and a second wire. The overheating protection module includes a first pin, a second pin, a thermal circuit breaker, and a protective resistor. The thermal circuit breaker and the protective resistor are connected in parallel. A first end of the protective resistor is connected to one of the first pin or the second pin, and a second end of the protective resistor is connected to one of the first wire or the second wire. When temperature of the thermal circuit breaker is excessive, the thermal circuit breaker is disconnected, current continues to supply power to low-current electrical appliances through the protective resistor.

A temperature switch (10) includes: a movable plate (11) that is elastically deformable; a movable contact (12) provided on the movable plate (11); a fixed contact (13) provided so as to face the movable contact (12); a bimetal element (14) (an example of a thermally deformable member) that is elastically deformed in accordance with a temperature change so as to elastically deform the movable plate (11) such that the movable plate (11) is positioned at a contact position such that the movable contact (12) is in contact with the fixed contact (13) or a spaced position (movable plate 11-1) such that the movable contact (12) is spaced apart from the fixed contact (13); and a projecting section (15a) (an example of a vibration suppression section) that suppresses vibrations of the movable plate (11) by contacting a portion of the movable plate (11) on a fixed-edge side of the movable plate (11) with reference to a center (C) of the movable contact (12) when the movable plate (11) is elastically deformed to shift from the contact position to the spaced position.

A temperature switch (10) includes: a movable plate (11) that is elastically deformable; a movable contact (12) provided on the movable plate (11); a fixed contact (13) provided so as to face the movable contact (12); a bimetal element (14) (an example of a thermally deformable member) that is elastically deformed in accordance with a temperature change so as to elastically deform the movable plate (11) such that the movable plate (11) is positioned at a contact position such that the movable contact (12) is in contact with the fixed contact (13) or a spaced position (movable plate 11-1) such that the movable contact (12) is spaced apart from the fixed contact (13); and a projecting section (15a) (an example of a vibration suppression section) that suppresses vibrations of the movable plate (11) by contacting a portion of the movable plate (11) on a fixed-edge side of the movable plate (11) with reference to a center (C) of the movable contact (12) when the movable plate (11) is elastically deformed to shift from the contact position to the spaced position.

A temperature-dependent switch which comprises a first and a second stationary counter contact and a temperature-dependent switching mechanism having a current transfer member. The switching mechanism, depending on its temperature, either closes the switch by pressing the current transfer member against the first and the second counter contact and thereby establishing an electrically conductive connection between the two counter contacts via the current transfer member, or opens the switch by keeping the current transfer member at a distance from the first and the second counter contact and thereby interrupting the electrically conductive connection. A closing lock is provided, which keeps the switch open when it has been opened for the first time. The closing lock comprises a spring washer which directly interacts with the current transfer member and mechanically locks the latter permanently when the switch has been opened for the first time so that the switch remains permanently open.

An electric circuit 100 includes a power line 13 to supply electric power from a power source 11 to a load 12, and a monitor line 14 electrically independent from the power line 13 to detect temperature of the heat source. The monitor line 14 has a breaker 1 connected thereon in series. The breaker 1 includes a fixed contact, a movable piece having a movable contact and pressing the movable contact so as to contact the fixed contact, and a thermally actuated element deforming with temperature changes to actuate the movable piece so that the movable contact is spaced apart from the fixed contact.