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.

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 breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 having an elastically deformable elastic portion 44 and a movable contact 41 formed at a tip portion of the elastic portion 44 and pushed to be in contact with the fixed contact 21, a thermally actuated element 5 deformable in accordance with a temperature change to shift the state of the movable piece 4 from a conductive state to a cut-off state, and a case 10 accommodating the fixed piece 2, the movable piece 4, and the thermally actuated element 5. The movable piece 4 is cantilevered and supported by the case 10 on a base end portion (44s) side of the elastic portion 44, the elastic portion 44 includes a first narrow portion 45 having a smaller width dimension (W) in a short direction (D2) perpendicular to a longitudinal direction (D1) of the elastic portion 44 than that of the base end portion (44s), and the first narrow portion 45 has an arc-shaped contour 46 in a plan view seen from a thickness direction of the elastic portion 44.

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.

A temperature-dependent switch comprising first and second stationary contacts and a temperature-dependent switching mechanism having a movable contact member. The switching mechanism, in its first switching position, presses the contact member against the first contact and thereby produces an electrically conductive connection and, in its second switching position, keeps the contact member spaced apart from the first contact and thereby disconnects the electrically conductive connection. The switch further comprises a closing lock that, once activated, prevents the switch once having opened from closing again by keeping the switching mechanism in its second switching position. The closing lock comprises a locking element having a shape-memory alloy and is configured to change its shape upon exceeding a locking element switching temperature from a first shape, in which the locking element does not activate the closing lock, into a second shape, in which the locking element activates the closing lock.

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.

A temperature-dependent switch having a housing that comprises a cover part and an electrically conductive lower part. The switch further comprises a first external contact surface arranged on the upper side of the cover part, and a second external contact surface provided externally on the housing. Still further, the switch comprises a temperature-dependent switching mechanism that is arranged in the housing and that, depending on its temperature, establishes or opens an electrically conductive connection between the first and the second external contact surfaces. A circumferential cutting burr acting as a sealing means is furthermore provided, that penetrates into the insulating foil or the cover part, wherein the cutting burr is arranged on a sealing ring that is connected to the lower part by means of a non-positive, positive and/or firmly bonded connection.

A breaker has a fixed contact, a movable piece which has an elastic portion formed in a plate shape and being elastically deformable, and a movable contact in one end portion of the elastic portion so as to press the movable contact against the fixed contact, a thermally-actuated element which is deformed in accordance with a temperature change and shifts from a conduction state in which the movable contact contacts with the fixed contact to a shut-off state in which the movable contact separates from the fixed contact, and a case which accommodates the fixed contact, the movable piece, and the thermally-actuated element. The case has a side wall extending in a long direction of the movable piece, and the side wall is provided, in an adjacent portion to the thermally-actuated element, with a convex portion protruding toward the outside of the case.

Provided is a breaker capable of further downsizing without impairing rigidity and strength of a case. The breaker 1 comprises a fixed contact 21, a movable piece 4 having and pressing a movable contact 41 to the fixed contact 21, a thermally responsive element 5 for moving the movable piece 4 to separate the movable contact 41 from the fixed contact 21 by deformation thereof responding to temperature change, a case for containing the fixed piece 21, the movable piece 4 and the thermally responsive element 5, and a cover piece 8 attached on the case 7. The case 7 has an end face 72 on which the cover piece 8 is disposed, a containing recess 73 caved from the end face 72 and forming a space to which the movable piece 4 and the thermally responsive element 5 are contained, and a first protrusion protruding from the end face 72 and to which the cover piece 8 is fitted.

The breaker 1 is provided with a fixed contact 21, a movable piece 4 having an elastic portion 43 and a movable contact 41, a thermally-actuated element 5 deforming with a change in the temperature so as to shift the movable piece 4 from a conduction state to a cut-off state, a case main body 7 housing the movable piece 4 and the thermally-actuated element 5, a lid member 8 attached to the case main body 7, and a plate-shaped cover piece 9 embedded in the lid member 8. The case main body 7 is provided with a first fixing surface 75 fixed to the lid member 8, and the lid member 8 is provided with a second fixing surface 85 fixed to the case main body 7. The second fixing surface 85 is provided with a protruding portion 86 protruding toward the first fixing surface 75, and the protruding portion 86 and the cover piece 9 are overlapped with each other in the plan view as viewed in the thickness direction of the cover piece 9.