JPH04303722A - Trigger mechanism - Google Patents

Abstract

PURPOSE:To improve the reliability of a trigger mechanism by providing a bimetal so that one end is supported and the free end of the other end latches a latch part, and providing an L-shaped bimetal which supports the bimetal so as to have the overlapped part with the tip part of the bimetal. CONSTITUTION:One end of a bimetal 4 is supported, and a latch part 1 is latched with the free end of the other end. A bimetal 3 is formed in an L shape and provided orthogonally with respect to the bimetal 4. A part of the short side part is supported under the state wherein the part is overlapped with the tip part of the metal 4. The apparatus is energized at the normal time. The part 1 is latched with the metal 4. When the temperature of the attaching part of the trigger mechanism or atmosphere rises up, the metal 4 is deformed in the direction of an arrow B and brought into contact with the metal 3. After the contact, the energized state is kept. At the same time, the metal 3 is deformed in the direction A. When the overlap with the metal 4 is freed, the metal 4 is released in the direction B, and the latching of the part 1 is disengaged. Thus, the apparatus is operated.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a trigger mechanism used in, for example, an abnormal overheating detection sensor, and is a trigger mechanism that operates a certain device by using the operation of a bimetal due to a rise in the temperature of the mounting point of the trigger mechanism or the atmosphere as a trigger. It is related to.

0002

2. Description of the Related Art FIG. 3 is a partial perspective view of a certain device to which a conventional trigger mechanism is applied before operation, in which 1 is a latch component to which the device is latched; The spring steel 3 that is applied is a bimetal that keeps the spring steel 2 in a charged state and releases the spring steel 2 when the temperature of the trigger mechanism attachment point or the atmosphere rises. Note that FIG. 4 shows a partial perspective view of the latch section when the device to which the conventional trigger mechanism is applied is operated.

Next, the operation will be explained. Normally, the bimetal 3 keeps the spring steel 2 in a stored state, and the stored spring steel 2 latches the latch component 1 of a certain device that has stored power. When the temperature of the location where the trigger mechanism is installed or the atmosphere rises, the bimetal 3 deforms in the direction of arrow A, resulting in the overlap (engagement) between the bimetal 3 and the spring steel 2.
is released, and the spring steel 2, which was in the stored state, is released in the direction of arrow B. At the same time, the latch part 2 is unlatched in direction C, and the device becomes operational.

0004

[Problems to be Solved by the Invention] Since the conventional trigger mechanism is constructed as described above, the spring steel 2 constantly applies stress to the bimetal 3, so there is a high possibility that the bimetal 3 will malfunction. malfunctions,
There were problems such as the trigger mechanism malfunctioning.

[0005] This invention was made in order to solve the above-mentioned problems. Stress does not act inside the trigger mechanism all the time, so the possibility of malfunction of the bimetal is low, and malfunction of the bimetal is caused by the trigger mechanism itself. The purpose is to prevent malfunctions.

[0006]

A trigger mechanism according to the present invention uses bimetal instead of conventional spring steel and is constructed by combining two bimetals.

[0007]

[Operation] Because the trigger mechanism of this invention uses bimetal instead of spring steel, stress does not act inside the trigger mechanism at all times, and stress acts inside the trigger mechanism only when the temperature of the trigger mechanism attachment point or the atmosphere rises. Therefore, there is a low possibility that the bimetal will malfunction, and the trigger mechanism will not malfunction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial perspective view of a latch part before operation of a certain device to which a trigger mechanism is applied, in which 1 is a latch part to which the device is latched, 4 is a bimetal that latches this latch part 1, and 3 is a bimetal that deforms and releases the bimetal 4 while keeping the bimetal 4 in an energized state when the temperature of the attachment point of the trigger mechanism or the atmosphere rises, and is formed in an L shape and is arranged perpendicularly to the bimetal 4. At the same time, a part of the short side 3a thereof is supported in a state where it overlaps with the tip of the bimetal 4. Note that FIG. 2 is a partial perspective view of the latch section after the device to which the trigger mechanism is applied is operated.

Next, the operation will be explained. Normally, the device stores energy and latches the latch component 1 with the bimetal 4. When the temperature of the attachment point of the trigger mechanism or the atmosphere rises, the bimetal 4 deforms in the direction of arrow B and comes into contact with the bimetal 3, and maintains the energy storage state after contact. At the same time, the bimetal 3 also deforms in the A direction, and when it no longer overlaps with the bimetal 4, the bimetal 4 is released in the B direction,
The latch part 1 is unlatched and the device is operated.

[0010] In the above embodiment, the bimetal is combined so that the bimetal becomes energized and deenergized by the rise in temperature of the mounting part of the trigger mechanism or the atmosphere, but a trimetal may be used instead of the bimetal. , the same effect as the above embodiment is achieved.

[0011]

[Effects of the Invention] As described above, according to the present invention, stress is not applied inside the trigger mechanism at all times, so the possibility of malfunction is low, and the overlap between bimetal 3 and bimetal 4 occurs at the mounting point or at a temperature other than the temperature rise in the atmosphere. Even if the bimetal 4 disappears, the bimetal 4 does not operate, which does not lead to malfunction of the trigger mechanism, and has the effect of providing a highly reliable trigger mechanism.

[Brief explanation of the drawing]

FIG. 1 shows a trigger mechanism according to an embodiment of the present invention, and is a diagram before operation.

FIG. 2 is a diagram of the trigger mechanism of FIG. 1 after operation;

FIG. 3 shows a conventional trigger mechanism before operation.

FIG. 4 is a diagram of the trigger mechanism of FIG. 3 after operation;

[Explanation of symbols]

1 Latch parts 3 Bimetal 4 Bimetal

Claims (1)

[Claims] Claims: 1. A bimetal supported at one end and latching a latch component of a device at its other free end; Trigger mechanism with an L-shaped bimetal supported in an overlapping state with the tip.