WO2008044458A1

WO2008044458A1 - Temperature detector

Info

Publication number: WO2008044458A1
Application number: PCT/JP2007/068499
Authority: WO
Inventors: Hiroshi Nozue
Original assignee: Kurabe Industrial Co., Ltd.
Priority date: 2006-10-06
Filing date: 2007-09-25
Publication date: 2008-04-17
Also published as: KR20090063221A; CN101523538A; JPWO2008044458A1

Abstract

Intended is to provide a temperature detector, which can be made conductive, when exposed even partially to a target temperature such as an abnormally high temperature, to detect the temperature, which is made so thin and flexible that it can be mounted on detection objects of various shapes and which has an excellent operation reliability. The temperature detector comprises a first long electrode having a spring property, a second long electrode arranged adjacent to the first electrode, and a spacer made of an insulating material and arranged to insulate the first electrode and the second electrode biased in one direction. When the temperature detector is exposed to a predetermined temperature, the insulation by the spacer between the first electrode and the second electrode is released so that the first electrode and the second electrode are made to contact and conduct with each other thereby to detect the predetermined temperature.

Description

Specification

Temperature detector

Technical field

[0001] The present invention relates to a temperature detecting body that can be electrically connected to a target temperature such as an abnormally high temperature to detect a predetermined temperature, and is particularly thin and excellent in flexibility. Therefore, the present invention relates to a device that can be mounted on detection objects of various shapes and has excellent operation reliability.

Background art

Conventionally, in order to detect an abnormal temperature in a thermal device, a lithium secondary battery, or the like, an element-shaped temperature fuse or thermistor is used as a safety device. In addition, when there is a wide range of places where there is a possibility of abnormal temperatures, multiple temperature fuses and thermistors are connected and used to improve safety.

However, in such a configuration, there is a problem in that it is not certain that the abnormal temperature is detected reliably, and that it acts reliably on the abnormal temperature that occurs locally. In addition, the amount of use of the thermal fuse increases the thermistor, which not only increases the cost of parts, but also requires a great amount of man-hours for the connecting process, resulting in a very high working cost.

[0003] Various surface-shaped thermal fuses are conventionally known as means for solving such problems. For example, as in Patent Document 1, a thermoplastic resin film is interposed between a film sheet-like flat electrode and a film-like heat detection electrode having a concavo-convex shape or a plurality of holes, and these are polyethylene terephthalate films. What was covered with is mentioned. In Patent Document 1, when an abnormally high temperature occurs, the thermoplastic resin film melts and flows into the concave and convex recesses or holes formed on the surface of the heat detection electrode, and the heat detection electrode and the flat electrode are in contact with each other. Thus, when an abnormal temperature is detected by conducting, the technique relates to the technique.

[0004] Also, as in Patent Document 2, two plate-like electrode plates face each other, and an electrically insulating substance that melts at a temperature of a predetermined value or more across the entire area between them is pressed and sandwiched Are listed. This patent document 2 discloses that both electrode plates are melted when an electrically insulating material is melted by overheating. Are in contact with each other and electrically connected to detect an abnormality.

[0005] Although not directly related to the present application! /, But in the field of heating wires! /, For example, as in Patent Document 3, a pair of PTC heating element layers are paired on the outer surface. It is known that a spiral electrode wire is formed, a heat-melting polymer layer is formed so as to contact the electrode wire and the PTC heating element layer, and a conductor wire is further formed on the outer surface of the heat-melting polymer layer. Yes. Patent Document 3 relates to a technique in which a meltable polymer layer melts against abnormal overheating, the spiral electrode wire contacts the outermost conductor wire, and overheating is prevented.

[0006] As a technique related to the present application, Patent Document 4 has been filed by the patent applicant.

[0007] Patent Document 1: Japanese Patent Laid-Open No. 6-229839

Patent Document 2: JP-A-9 145164

Patent Document 3: Japanese Patent Application Laid-Open No. 59-207586

Patent Document 4: Japanese Patent Application No. 2006—81339 Specification

Disclosure of the invention

Problems to be solved by the invention

[0008] Here, in the case of the planar thermal fuse disclosed in the above-mentioned Patent Document 1, unless a sufficient depth is provided in the recess or hole of the heat detection electrode, thermoplasticity is provided between the heat detection electrode and the planar electrode. A part of the resin film remains, and the heat detection electrode and the flat electrode cannot be reliably brought into contact with each other. However, if the recess or hole of the heat detection electrode is made sufficiently deep, the thickness of the heat detection electrode increases, and flexibility as a planar temperature fuse cannot be obtained. .

[0009] Further, the planar thermal fuse disclosed in Patent Document 2 does not have a space for the molten electrically insulating material to move, and therefore remains between the two electrode plates in a molten state. It is conceivable that contact cannot be achieved. Further, Patent Document 2 discloses the use of a material in which solder particles are mixed in a flux as an electrically insulating material. As a result, when the temperature is abnormal, the flux melts and disappears, and the solder particles overlap or are fused to bridge the two electrode plates. However, in this case, due to the effect of the flux, the molten solder is separated into small spheres during detection. It is conceivable that the two electrode plates cannot conduct. In addition, when used in a high temperature environment for a long time, the flux may be dissipated due to thermal deterioration. In this case, even if the temperature does not reach the abnormal temperature, the two electrode plates become conductive. It will malfunction.

[0010] In addition, in the heating wire described in Patent Document 3, the spiral electrode wire was simply wound around the PTC heating element layer, and the outermost conductor wire was simply wound around the hot-melt polymer layer. It is only a configuration. Therefore, even if abnormal overheating occurs locally and the heat-meltable polymer layer melts, the force that changes the distance between the spiral electrode wire and the conductor wire does not work. May not reach the contact.

[0011] The present invention has been made on the basis of these points, and the object of the present invention is to conduct electricity by partially exposing to a target temperature such as an abnormally high temperature and detect the temperature. It solves the problem of providing a temperature detector that can be mounted on sensing objects of various shapes because it is thin and flexible, and has excellent operational reliability. Means to do

[0012] In order to achieve the above object, a temperature detector according to claim 1 of the present invention has a panel-like long first electrode and a long electrode disposed adjacent to the first electrode. And a spacer arranged to insulate the first electrode made of an insulating material and biased in one direction from the second electrode, at a predetermined temperature. By exposure, the insulation of the first electrode and the second electrode by the spacer is released, and thereby the first electrode and the second electrode are brought into contact with each other and are electrically connected to each other at a predetermined temperature. This is characterized by the fact that it is detected.

The temperature detector according to claim 2 is the temperature detector according to claim 1, wherein at least one of the first electrode and the second electrode is covered with the spacer. It is characterized by this.

The temperature detector according to claim 3 is the temperature detector according to claim 1 or 2, wherein the first electrode and the second electrode are installed in an intertwined state. ί 毁.

A temperature detection body according to claim 4 is the temperature detection according to any one of claims 1 to 3. In the body, at least one of the first electrode and the second electrode has a stranded wire structure!

The temperature detector according to claim 5 is the temperature detector according to claim 4, wherein the first electrode and the second electrode both have a stranded wire structure, and the twist direction is opposite. It is characterized by that.

The temperature detection body according to claim 6 is the temperature detection body according to claim 2, wherein a space holding member is provided on the outer periphery of the first electrode, the second electrode, and the spacer. That is ί 毁.

A temperature detector according to claim 7 is the temperature detector according to claim 6, wherein the space holding member is made of a conductive material.

Further, the temperature detecting body according to claim 8 is the temperature detecting body according to claim 2, wherein the first electrode, the second electrode, and the outer periphery of the spacer are coated with another spacer. It is characterized by this.

In addition, the temperature detection body according to claim 9 is the temperature detection body according to any one of claims 1 to 8, wherein the spacer is melted at a predetermined temperature. It is a characteristic.

The invention's effect

As described above, according to the temperature detector according to claim 1 of the present invention, the long first electrode having a panel property and the long first electrode disposed adjacent to the first electrode are provided. Two electrodes, and a spacer that is arranged to insulate the first electrode and the second electrode made of an insulating material and biased in one direction, and is exposed to a predetermined temperature. As a result, the insulation between the first electrode and the second electrode by the spacer is released, so that the first electrode and the second electrode are brought into contact with each other and are brought into conduction so that a predetermined temperature is reached. Since it is configured to detect, the first electrode is positively brought into contact with the second electrode by releasing the insulation between the first electrode and the second electrode by the spacer. Therefore, the first electrode and the second electrode are in reliable contact with each other and are electrically connected. It is possible to reliably detect the target temperature such as temperature, and to improve safety. In addition, since it does not increase the thickness of the electrode, it is thin and flexible as a temperature detector. And can be attached to detection objects of various shapes. The temperature detector according to claim 2 is the temperature detector according to claim 1, wherein at least one of the first electrode and the second electrode is covered with the spacer. Therefore, it is possible to obtain a structure in which the insulation between the first electrode and the second electrode biased in one direction by the spacer is reliably maintained with a relatively simple configuration.

The temperature detector according to claim 3 is the temperature detector according to claim 1 or claim 2, wherein the first electrode and the second electrode are installed in an intertwined state. As a result, the first electrode is in a sufficiently energized state, and the temperature can be detected in all the tangled and crossed portions, thereby improving the detection accuracy.

A temperature detector according to claim 4 is the temperature detector according to any one of claims 1 to 3, wherein at least one of the first electrode and the second electrode has a stranded wire structure. Therefore, the contact between the first electrode and the second electrode during temperature detection can be made more reliable and quick.

The temperature detector according to claim 5 is the temperature detector according to claim 4, wherein the first electrode and the second electrode both have a stranded wire structure, and the twist direction is opposite. Therefore, the contact between the first electrode and the second electrode at the time of temperature detection can be made more reliable and quick.

The temperature detector according to claim 6 is the temperature detector according to claim 2, wherein a space holding member is provided on the outer periphery of the first electrode, the second electrode, and the spacer. Therefore, the insulation release operation by the spacer is performed more smoothly.

The temperature detection body according to claim 7 is the temperature detection body according to claim 6, wherein the space holding member is made of a conductive material. The power S can be demonstrated.

Further, the temperature detecting body according to claim 8 is the temperature detecting body according to claim 2, wherein the first electrode, the second electrode, and the outer periphery of the spacer are coated with another spacer. Since it is configured, the first electrode and the second electrode can be held more reliably. Further, the temperature detection body according to claim 9 is the temperature detection body according to any one of claims 1 to 8, wherein the spacer is configured to melt at a predetermined temperature. Since it becomes the same as the melting temperature of the spacer, the detection temperature can be easily set. Moreover, the detection temperature can be freely set by appropriately selecting spacers having various melting points.

Brief Description of Drawings

FIG. 1 is a diagram showing a first embodiment of the present invention and is a partially cutaway perspective view of a temperature detector.

FIG. 2 is a diagram showing a first embodiment of the present invention and a circuit diagram showing a circuit configuration of a temperature detector.

FIG. 3 is a diagram showing a first embodiment of the present invention, and is a perspective view showing a state in which a temperature detector is attached to a thermal device.

FIG. 4 is a diagram showing a second embodiment of the present invention, in which FIG. 3 (a) is a partially cutaway perspective view showing the state of the temperature detector before temperature detection, and FIG. FIG. 4 is a partially cutaway perspective view showing a state of a temperature detection body after detection.

FIG. 5 is a diagram showing a third embodiment of the present invention, in which FIG. 4 (a) is a partially cutaway perspective view showing the state of the temperature detector before temperature detection, and FIG. FIG. 4 is a partially cutaway perspective view showing a state of a temperature detection body after detection.

FIG. 6 is a diagram showing a fourth embodiment of the present invention, and is a partially cutaway perspective view of a temperature detector.

FIG. 7 is a diagram showing a fifth embodiment of the present invention, and is a partially cutaway perspective view showing an enlarged main part of a temperature detector.

FIG. 8 is a diagram showing a sixth embodiment of the present invention, and is a partially cutaway perspective view in which a main part of a temperature detector is enlarged.

FIG. 9 is a diagram showing a seventh embodiment of the present invention, and is a partially cutaway perspective view showing an enlarged main part of a temperature detector.

FIG. 10 is a diagram showing an eighth embodiment of the present invention, and is a partially cutaway perspective view in which a main part of a temperature detector is enlarged.

FIG. 11 is a diagram showing an eighth embodiment of the present invention, in which a part of an enlarged main part of a temperature detector is shown. It is a notch perspective view.

FIG. 12 shows the ninth embodiment of the present invention, and is a partially cutaway perspective view in which the main part of the temperature detector is enlarged.

Explanation of symbols

[0015] 1 First electrode

2 Second electrode

3 Spacer

4 Base material

5 Huinolem

10 Temperature detector

BEST MODE FOR CARRYING OUT THE INVENTION

The first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The planar temperature detector according to the present embodiment is configured to detect a temperature near 85 ° C.

[0017] As shown in FIG. 1, on the outer periphery of the first electrode 1 made of SUS304 stainless steel wire, on the outer periphery of a hot melt adhesive (melting point 85 ° C) and solid wax (melting point 85 ° C). Spacer 3 is extrusion coated. The first electrode 1 and the second electrode 2 made of a copper twisted wire are twisted together and placed on a substrate 4 made of a PET nonwoven fabric. On the first electrode 1 and the second electrode 2, a film 5 made of PET force having an adhesive applied on one side is attached to protect the electrode. In this way, the temperature detector 10 according to the present embodiment is configured.

Then, for example, as shown in FIG. 3, the temperature detector 10 having the above-described configuration is installed at a predetermined position on the outer periphery of an arbitrary thermal device 11. Accordingly, the abnormal temperature in the thermal equipment 11 is detected.

Further, the test circuit configuration of the temperature detector 10 is as shown in FIG. In the figure, reference numeral 6 is a power source, and reference numeral 7 is an ammeter. In the circuit diagram shown in FIG. 2, when the spacer 3 is not melted, the circuit is shut off. On the other hand, when the spacer 3 is melted at a predetermined temperature, the first electrode 1 and the second electrode 2 come into contact with each other. That As a result, a current flows through the circuit, and it is detected that a predetermined temperature has been reached.

Note that FIG. 2 is merely a diagram showing a test circuit configuration as described above, and a different circuit configuration is used when actually implemented.

[0018] 1. The temperature detector 10 thus obtained is placed in a heating tank (not shown). Increase the temperature in CZ minutes. In the test circuit diagram shown in FIG. 2, the temperature at which the spacer 3 was melted and the first electrode 1 and the second electrode 2 contacted and energized was measured as the detected temperature.

The number of samples was 5. As a result, all samples were detected at 85 to 90 ° C, and it was confirmed that they could be reliably detected at the target temperature.

[0019] According to the above-described embodiment, before reaching the target temperature, the first electrode 1 is energized with a twisting force applied thereto, and the first electrode 1 The spacer 3 is placed at a distance from the second electrode 2 by the spacer 3 covered with the first electrode 2, that is, the first electrode is energized and fixed and held by the spacer. ing. When even a part of the temperature sensing body reaches the target temperature, the fixed holding in the energized state is released by melting the spacer 3, and the first electrode 1 is positively Since the second electrode 2 is contacted, the first electrode 1 and the second electrode 2 are surely connected to each other, and the force S can be detected. In addition, the first electrode 1, the second electrode 2, the spacer 3, the base material 4, and the film 5 are all excellent in flexibility than those having a thickness. As a whole, it can be made thin and excellent in flexibility.

[0020] Since the spacer 3 is extrusion coated on the outer periphery of the first electrode 1, the first electrode 1 and the spacer 3 can be handled as a single linear body. Handling during manufacturing facilitates placement on the substrate and improves productivity. Furthermore, since the spacer 3 completely covers the first electrode 1, conduction in a state where the target temperature has not been reached, that is, malfunction can be reliably prevented.

Note that the temperature detector 10 according to the present invention is not limited to the above-described embodiment. The first electrode 1 is not particularly limited as long as it is a conductor having panel properties, such as a hard steel wire, a piano wire, an oil tempered wire, and a stainless steel wire. Other examples For example, an insulating material having a panel property in which a conductive wire is wound horizontally may be considered. In addition, the shape is not particularly limited as long as it does not prevent positive contact with the second electrode when the fixed holding in the biased state is released. In addition, a single wire, a wire such as a twisted wire, a so-called belt-like one having a predetermined width, and the like are arranged on the substrate 4 in various shapes such as a meandering shape and a linear shape. It is possible to do. In this case, the first electrode 1 may be composed of a plurality of conductors rather than a single conductor. For example, a plurality of linear conductors may be formed in a net-like shape. One electrode 1 may be used.

Next, the second electrode 2 is not limited as long as it is a conductive material. For example, the second electrode 2 is a single wire made of conductive organic fibers such as iron, copper, aluminum, alloys thereof, carbon fibers, or the like. It may be a linear one such as a twisted one, or a so-called belt-like one having a predetermined width. Moreover, it is good also as a sensor wire which wound the temperature detection wire around the outer periphery of the tensile strength body. Moreover, it does not have to be linear, for example, it may be constituted by a foil or a plurality of linear conductors formed in a net shape. In this way, when the second electrode 2 is disposed, it is possible to easily assemble without requiring frequent wiring, and thus productivity can be improved. Examples of the foil-like second electrode 2 include aluminum foil, copper foil, copper-PET film, conductive organic film, etc., and appropriately selected one having a thickness that does not decrease flexibility. If you use it!

[0023] If the second electrode 2 has a strip shape or a foil shape, the number of contact points with the first electrode 1 can be increased as described above. However, in terms of terminal processing when connecting electrodes to lead wires, etc., linear electrodes are superior in workability. Therefore, by using the band-shaped second electrode and the linear second electrode in combination, the contact point between the first electrode and the second electrode can be increased and the workability of the terminal processing can be improved. Can do.

Next, as the spacer 3, the first electrode 1 can be fixedly held in an energized state before reaching the target temperature, and when the target temperature is reached. There is no particular limitation as long as this fixed holding can be released. For example, the shape and arrangement of the first electrode 1 and the second electrode 2 such as those that melt at a predetermined temperature, those that vaporize, those that shrink, those that reduce viscosity, or the spacer 3 itself What is necessary is just to select suitably according to a shape and arrangement | positioning. This Among these, those that melt at a predetermined temperature are preferred because they can be most easily used and the detection temperature can be easily set. Examples of the material that melts at a predetermined temperature include, for example, polyethylene resin, ethylene acetate butyl copolymer resin, polyester resin, polyamide resin, polybutyl alcohol copolymer resin, polyvinylidene chloride resin, polychlorinated butyl resin, and polyurethane resin. , Thermoplastic resins such as polypropylene resins, thermoplastic elastomers such as olefin-based elastomers, organic waxes, natural waxes such as plant-based, animal-based and ore-based materials, petroleum-based waxes such as paraffin, microwax and petratum wax , Wax products, resin products, asphalt products and other synthetic waxes, fatty acids, fatty acid salts, etc., and mixtures thereof, and those with melting points that match the target temperature are selected appropriately. Just do it.

[0025] In Fig. 1 above, the force obtained by twisting the first electrode 1 and the second electrode 2 is the force arranged in a meandering shape. There is no limit. For example, a twisted combination of the first electrode 1 and the second electrode 2 is arranged in a straight line. It is good as a thing.

However, if the surface of the thermal device 11 is arranged in a meandering shape as shown in FIG. 1, even if the surface of the thermal device 11 is a curved surface or an intricate shape, it is possible to easily follow the shape. That is, when arranged in a meandering shape, the electrode is arranged obliquely with respect to a curved surface or an intricate shape, so that the bending radius of the electrode itself is increased, and as a result, adhesion is improved. is there. In addition, even when an external force such as tension or bending is applied to the temperature detector 10 during the placement, the first electrode 1 and the second electrode 1 are difficult to apply excessive force to the first electrode 1 and the second electrode 2. This is preferable because the disconnection of the second electrode 2 can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the first electrode 1 and the second electrode 2 covered with the spacer 3 are twisted together. However, the present invention is not limited to this. . In short, before reaching the target temperature, the spacer 3 is arranged to insulate the first electrode 1 from the second electrode 2 and the first electrode 1 The first electrode 1 is fixed and held by the spacer 3 when exposed to the target temperature. It is sufficient that the first electrode 1 and the second electrode 2 are in contact with each other after being released.

As another specific example, as shown in FIG. 4, a configuration in which the coiled first electrode 1 is covered with a spacer 3 in a reduced diameter state and the second electrode 2 is arranged on the outer periphery thereof {FIG. In Fig. 4, Fig. 4 (a) shows the state before detection, and Fig. 4 (b) shows the state after detection.

Next, a third embodiment of the present invention will be described with reference to FIG. In this case, the first

As in the case of the second embodiment, the rectangular portion of the first electrode 1 that has stood upward is forcibly placed between the spacer 3 and the base material 4 in the state in which the sleeping force is forced. A configuration in which the second electrode 2 is arranged on the top of 3 {in Fig. 5, Fig. 5 (a) shows a state before detection, Fig. 5 (b) shows a state after detection}, and the like.

These second and third embodiments are also within the scope of the present invention, but preferably one or both of the first electrode 1 and the second electrode 2 as in the first embodiment. The spacer 3 is covered with the first electrode 1 and the second electrode 2 are entangled with each other.

Note that the “entangled state” here includes not only the form of twisting as described above, but also includes the form of the first electrode 1 laterally wound around the outer periphery of the second electrode 2, for example. .

Next, a fourth embodiment of the present invention will be described with reference to FIG. The base material 4 shown in the first to third embodiments is not particularly required, but as a preferred form when the spacer 3 is melted at a predetermined temperature, as a form, It is sufficient that the melted spacer 3 has a shape and a configuration that can move, that is, can flow. For example, it is possible to consider a sheet provided with unevenness or a hole, a net made of various linear materials, or the like. In particular, it is preferable that the molten spacer 3 can be absorbed. This is because the contact between the first electrode 1 and the second electrode 2 can be performed more quickly by effectively absorbing the molten spacer 3. Examples of the base material 4 capable of absorbing such a melted spacer 3 include a mesh cloth, sponge, woven fabric, paper, and the like which are not limited to the nonwoven fabric described in the above embodiment.

There are no particular limitations on the material constituting the substrate 4. Of course, PET film or the like may be used in the same manner as film 5. Also, the shape is not limited to a sheet shape. For example, as shown in FIG. 6, the first electrode 1, the second electrode 2, and the spacer 3 are covered, A covering material may be used as the base material 4.

Next, a fifth embodiment of the present invention will be described with reference to FIG. Similarly to the substrate 4, the film 5 shown in the first to fourth embodiments may be provided if necessary, and may not be provided unless particularly necessary.

[0030] In the case where the first electrode 1 and the second electrode 2 coated with the spacer 3 are twisted together, as shown in FIG. 7, the first electrode coated with the spacer 3 A braid 21 made of various fiber materials, fine metal wires, or the like may be applied to the outer periphery where the 1 and the second electrode 2 are twisted together. As a result, a space can be provided around the first electrode 1 and the second electrode 2 coated with the spacer 3, so that the molten spacer 3 can easily move to the substrate 4. Become. Further, if the braid 21 is made of a conductive material such as a metal fine wire, the braid 21 can also function in the same manner as the second electrode 2.

Next, a sixth embodiment of the present invention will be described with reference to FIG. When the first electrode 1 covered with the spacer 3 and the second electrode 2 are twisted together, as shown in FIG. 7, the first electrode 1 covered with the spacer 3 A lateral winding 22 made of various fiber materials or fine metal wires may be applied to the outer periphery of the second electrode 2 twisted together. As a result, a space can be provided around the first electrode 1 and the second electrode 2 coated with the spacer 3, so that the molten spacer 3 can easily move to the substrate 4. . Further, if the horizontal winding 22 is made of a conductive material such as a fine metal wire, the horizontal winding 22 can function in the same manner as the second electrode 2.

Next, a seventh embodiment of the present invention will be described with reference to FIG. In the case of the seventh embodiment, the first electrode 1 in the first embodiment has a twisted wire structure.

The other configurations are the same as those in the first embodiment, and the same parts are denoted by the same reference numerals and the description thereof is omitted.

Also in this case, the same effect as in the case of the first embodiment can be obtained. In addition, since the first electrode 1 has a twisted wire structure, when the spacer 3 is melted at the time of temperature detection, both the untwisting of the entire first electrode 1 and the untwisting of the twisted wire are performed. Since it works, the first electrode 1 and the second electrode 2 are easy to approach each other, thereby enabling more reliable and quick detection. Further, when such a stranded wire structure is used, a stainless steel wire and an annealed copper wire may be appropriately twisted. By doing so, the panel property and flexibility can be adjusted so that the arrangement of the first electrode 1 and the terminal attaching process to the terminal are facilitated. In particular, when a stainless steel wire and an annealed copper wire are twisted together, if the center is made of a stainless steel wire and an annealed copper wire is placed on the outer periphery, the twist will not be easily crushed and the terminal will contact the terminal. This is preferable because the resistance is low.

Next, an eighth embodiment of the present invention will be described with reference to FIG. In the case of the eighth embodiment, both the first electrode 1 and the second electrode 2 in the first embodiment have a twisted wire structure, and the first electrode 1 and the second electrode 2 Both electrodes 2 are covered with spacers 3 and 3, respectively. In this case, the twisting directions of the stranded wires of the first electrode 1 and the second electrode 2 are reversed.

Also in this case, the same effect as in the case of the first embodiment can be obtained. In addition, since the twist directions of the first electrode 1 and the second electrode 2 are opposite to each other, when the spacers 3 and 3 are melted during temperature detection, the first electrode 1 Since both the untwisting action and the untwisting action of the stranded wire work and the return directions of the stranded wires are close to each other, the first electrode 1 and the second electrode 2 are It is easy to get close to each other, which enables more reliable and quick detection.

Next, a ninth embodiment of the present invention will be described with reference to FIG. In the case of the ninth embodiment, in the configuration of the first embodiment, the base 4 and the film 5 are eliminated and the whole is covered with another spacer 3. is there.

In this case as well, the same effects as in the case of the first embodiment can be obtained, and the structure can be simplified by eliminating the base material 4 and the film 5.

In this embodiment, at the time of temperature detection, both the spacer 3 and the spacer T are melted so that the first electrode 1 and the second electrode 2 are in contact with each other. become. Next, a tenth embodiment of the present invention will be described with reference to FIG. In the case of the tenth embodiment, the second electrode 2 in the first embodiment is covered with a solid spacer 3.

Also in this case, the same effect as in the case of the first embodiment can be obtained.

Note that the present invention is not limited to the first to tenth embodiments.

For example, the first electrode 1 or the second electrode 2 may have a heater function. Thereby, it can have a heating function and a temperature detection function. As a specific mode, for example, it can be considered that either the first electrode 1 or the second electrode 2 is used as a heater wire. At this time, if the other electrode is the above-described sensor wire, the heater wire can be heated while normally controlling the temperature with the sensor wire, and the heater wire and the sensor wire are in contact with each other at the time of abnormality. Because it conducts, it can detect the potential difference that changes greatly and cut off the current. Examples of the heater wire include a resistance wire such as a nichrome wire and a Kanthal wire, and those wound around an outer periphery of a tensile body such as a Kepler core. As the sensor wire, for example, a temperature detection wire such as a Ni wire is wound around the outer periphery of a tensile body such as a Kepler core. If the first electrode is a heater wire or a sensor wire, it is good to use a material with elasticity as the strength member.

However, when using a conductive material for the tensile body, it is necessary to apply an insulation coating to the outer periphery.

As another embodiment, a combination of the sensor wire and the heater wire may be considered. For example, the outer periphery of the sensor wire is covered with an insulator and a resistance wire is wound around the outer periphery. In this case, an insulator is coated on the outer periphery and a temperature detection wire is wound around the outer periphery, and a resistance wire and a temperature detection wire are wound around the outer periphery of the tensile body so as not to contact each other.

[0037] In addition to the first electrode 1 and the second electrode 2, a heater spring may be provided. For example, if the first electrode 1 and the second electrode 2 are insulated at a temperature lower than the target temperature, a heater wire is arranged between the first electrode 1 and the second electrode 2. You may do it. Industrial applicability

As described in detail above, the present invention relates to a temperature detecting body that can conduct even when exposed to a target temperature such as an abnormally high temperature and can detect the temperature, and is thin and excellent in flexibility. Therefore, it can be mounted on detection objects of various shapes, and a temperature detection body having excellent operation reliability can be obtained. In addition, for example, secondary batteries, water heaters, refrigerators, air conditioner indoor / outdoor units, clothes dryers, jar rice cookers, hot plates, coffee makers, water heaters, ceramic heaters, petroleum heaters, vending machines, It can be used for heating futons, floor heating panel heaters, copiers, facsimiles, tableware dryers, fryer.

Claims

The scope of the claims

[1] A panel-like long first electrode, a long second electrode adjacent to the first electrode and an insulating material, and urged in one direction A spacer disposed to insulate the first electrode from the second electrode,

By exposing to the predetermined temperature, the insulation between the first electrode and the second electrode by the spacer is released, so that the first electrode and the second electrode are brought into contact / conduction. A temperature detecting body characterized in that a predetermined temperature is detected by the above.

[2] In the temperature sensing element according to claim 1,

A temperature detector, wherein at least one of the first electrode and the second electrode is covered with the spacer.

[3] In the temperature sensing element according to claim 1 or claim 2,

The temperature detection body, wherein the first electrode and the second electrode are installed in an intertwined state! /.

[4] In the temperature detector according to any one of claims 1 to 3,

At least one of the first electrode and the second electrode has a stranded structure.

[5] The temperature sensing element according to claim 4,

The temperature detector according to claim 1, wherein both the first electrode and the second electrode have a stranded wire structure, and the twist directions are opposite to each other.

[6] The temperature sensing element according to claim 2,

A temperature detector, wherein a space holding member is provided on the outer periphery of the first electrode, the second electrode, and the spacer.

[7] The temperature sensing element according to claim 6,

The temperature holding member is characterized in that the space holding member has a conductive material force.

[8] In the temperature sensing element according to claim 2,

A temperature detector, wherein the outer periphery of the first electrode, the second electrode, and the spacer is further coated with another spacer V. In the temperature detection body according to any one of claims 1 to 8,

A temperature detector, wherein the spacer is melted at a predetermined temperature.