JPH08124466A - Temperature switch - Google Patents

Abstract

PURPOSE: To provide good thermal responsiveness for the prevention of cracking by providing a clamp of a nonmagnetic material between the bores of a temperature- sensing magnetic material and of permanent magnets and a reed-switch storage body, the clamp having a stopper portion at one end and secured to the storage body at the other. CONSTITUTION: The contact portions of the pair of magnetic-material reed pieces 2a, 2b of a reed switch 2 are sealed inside a glass tube together with an inert gas and the opposite side is exposed to the outside for connection. The switch 2 is secured to a storage body 4 made of resin and is held in position by the packing of a mold- filling resin 8 to provide a watertight structure. A temperaturesensing magnetic material 6 and permanent magnets 5a, 5b are secured to the storage body 4 via a cylindrical clamp 33 passing through the bore side. The clamp 33 is constructed of a nonmagnetic material having a stopper portion 33a in the form of a flange or the like at its lower portion to prevent dropping and a caulking portion 33c at its upper portion which is secured to the storage body 4. Since heat is transferred also from the bore of the magnetic material 6 through the clamp 33, quick response to changes in outside temperature is assured, and, since no adhesive is used the glass tube, etc., is not cracked by thermal expansion of the adhesive.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a temperature switch,
More specifically, the present invention relates to a temperature switch most suitable for detecting the water temperature of a radiator of a vehicle or a toilet seat for washing with warm water or detecting the oil temperature of various internal combustion engines.

[0002]

2. Description of the Related Art A temperature switch having a good thermal response, in which a temperature-sensitive magnetic material is arranged outside a housing for housing a reed switch, and which directly transfers a temperature change of an object to be measured to the temperature-sensitive magnetic material, is shown in FIG. There is a device of Japanese Utility Model Publication No. Sho 49-32119 shown in FIG.

The temperature switch shown in FIG. 1 includes a housing a containing a reed switch b, a magnet c arranged outside the housing a and containing the reed switch in its magnetic circuit, and the housing a. a magnetic body (temperature-sensitive magnetic body) d made of a material having a remarkable temperature change rate of magnetic permeability arranged outside a, and the position of the magnet c is substantially changed by changing the magnetic permeability of the magnetic body d. The temperature switch is characterized by opening and closing the reed switch b with the same effect as described above. In the figure, e indicates a load and f indicates a power source.

However, in the case of this temperature switch,
There are the following problems. Regarding the improvement of thermal responsiveness, we focus only on putting the temperature sensitive part outside the container, effectively utilize the entire surface of the temperature sensitive magnetic substance, and fix the temperature sensitive magnetic substance to the container. The inherent thermal conductivity of the fixing member is not taken into consideration, and the thermal response is insufficient.

Although not specified in the specification of the above publication, it can be considered from the drawing that the temperature-sensitive magnetic material is adhesively fixed to the container. Even if this adhesive fixative is selected, the temperature-sensitive magnetic substance and magnet will fall out of the container due to deterioration due to use in a medium such as oil under high temperature, low temperature, heat cycle, etc. for a long period of time. There is a problem such as. Furthermore, when the temperature-sensitive magnetic material or magnet is bonded to the housing containing the reed switch, the temperature-sensitive magnetic material or magnet is cracked by the stress due to the thermal expansion of the adhesive under a high temperature atmosphere, and the housing is In the case of resin, there is a problem that the glass tube of the reed switch inside the housing is cracked by the compressive stress due to the thermal expansion of the adhesive.

[0006]

As described above, in the conventional temperature switch, the improvement of the thermal responsiveness is insufficient, and the fixing reliability of the temperature-sensitive magnetic body or the magnet fixed to the housing is problematic. Further, there is a problem that when exposed to a high temperature condition, the thermal expansion of the adhesive causes damage to the temperature-sensitive magnetic material, the magnet, or the glass tube of the reed switch inside the housing.

The present invention has been made in order to solve the above problems, and provides a temperature switch which has sufficient thermal response and does not cause cracks in the glass tube, magnet, or temperature-sensitive magnetic material of the reed switch. That is the purpose.

[0008]

According to a first aspect of the present invention, there is provided a temperature switch in which a reed switch is housed in a waterproof structure so that only its connecting lead wires or terminals are exposed to the outside, and the reed switch. A reed switch, which is arranged in the outer peripheral region of the housing corresponding to the switch, and which is made of a temperature-sensitive magnetic body that changes the magnetic path of the magnetic field to the reed switch by a magnet that causes a magnetic field to act on the reed switch and an external temperature. The switch drive unit, the temperature-sensitive magnetic body, the inner diameter of the permanent magnet, and the container are inserted between the container and the stopper unit for preventing the stopper from being formed at one end, and the container is provided on the side opposite to the stopper unit. And a fixing member made of a non-magnetic material, in which a fixing portion for fixing to is formed.

In the temperature switch according to the present invention, the reed switch is housed in a waterproof structure so that only the connecting lead wire or terminal is exposed to the outside, and the outer peripheral region of the reed switch. And a reed switch driving section formed of a temperature sensitive magnetic body that changes a magnetic path of a magnetic field to the reed switch by the magnet and a magnet that causes a magnetic field to act on the reed switch, and the temperature sensitive magnetism. A fixing bracket made of a non-magnetic material is provided, which surrounds the body and the outer circumference of the permanent magnet, has a stopper portion formed at one end to prevent the stopper from falling off, and has a fixing portion that is fixed to the container on the side opposite to the stopper portion. It is characterized by

According to a third aspect of the present invention, in the temperature switch, the reed switch is housed in a waterproof structure so that only the connecting lead wire or terminal is exposed to the outside, and the outer peripheral region of the reed switch. A reed switch driving section including a temperature-sensitive magnetic body and a magnetic spacer that changes the magnetic path of the magnetic field to the reed switch due to the magnet and a magnet that applies a magnetic field to the reed switch disposed in The reed switch drive unit is fixed to the container via a non-magnetic fixing metal fitting.

According to a fourth aspect of the present invention, there is provided a temperature switch, wherein the reed switch has a waterproof structure and is housed in a state in which only the connecting lead wire or terminal is exposed to the outside, and an outer peripheral region of the reed switch. Temperature-sensitive magnetic body and a first magnetic element that changes the magnetic path of the magnetic field to the reed switch by the first magnet and the first magnet that causes a magnetic field to act on the reed switch disposed in Fix the spacer to the container with non-magnetic fixing metal fittings,
The second magnet, which constitutes the reed switch driving unit together with the first magnet, the temperature-sensitive magnetic material, and the first spacer, is positioned and fixed by the step formed inside the housing, and
The spacer is composed of the housing protrusion located between the second magnet and the temperature-sensitive magnetic body.

According to a fifth aspect of the present invention, the temperature switch has a notch or a square hole formed in at least a portion of the fixing metal member located at the temperature-sensitive magnetic body.

[0013]

According to the temperature switch of the present invention, in addition to the outer peripheral surface of the temperature-sensitive magnetic body being exposed, heat is transmitted from the inner diameter of the temperature-sensitive magnetic body through the fixing metal, so that the thermal responsiveness is improved. Be improved.

Further, since the temperature-sensitive magnetic body and the magnet are positioned and fixed by the fixing metal fitting, it is not necessary to fill the space between the housing and the adhesive, so that the feeling of thermal expansion of the adhesive at a high temperature can be obtained. The warm magnetic material and the glass tube of the reed switch are not broken, and high temperature operation and high temperature atmosphere are possible. Furthermore, it can withstand immersion in oil or the like.

According to the temperature switch of the second aspect, in addition to the action of the temperature switch of the first aspect, there is also an action of mechanically protecting the temperature-sensitive magnetic body and the magnet.

According to the temperature switch of the third aspect, the thermal response has the same function as that of the first or second aspect, and the contact of the reed switch is turned on at the operation set temperature with the temperature rise, which is a normally open type. It becomes a temperature switch.

According to the temperature switch of the fourth aspect, since one magnet is incorporated inside the housing and a part of the housing is used as a non-magnetic spacer, the temperature switch is provided on the outer periphery of the thin portion of the housing. The size of the magnet and the spacer to be installed can be shortened and the size of the normally open temperature switch can be reduced.

According to the temperature switch of the fifth aspect, the heat response is improved by forming a notch or a square hole for exposing the temperature-sensitive magnetic material portion in a part of the fixing metal fitting in the vicinity of the temperature-sensitive magnetic material. Mechanical protection is also possible.

[0019]

Embodiments of the present invention will be described below in detail.

In the temperature switch shown in FIG. 1 and FIG. 2 which is a sectional view thereof, the lead wires or terminals 3a and 3b for connection are exposed to the reed switch 2 and a part of the lead wires or terminals is exposed to the outside. The reed switch 2 is housed in a resin container 4 having a bottom and a substantially cylindrical shape, and is fixed by a casting resin 8 filled from an opening of the container 4. In the reed switch 2, a pair of magnetic material reed pieces 2a and 2b are provided with a gap and overlapped to form a contact portion, which is sealed in a glass tube together with an inert gas. The tips of the lead wires on the side opposite to the contact portions are drawn out from the glass tube as respective external terminals. Then, on the outer circumference of the housing body 4, a reed switch drive including a temperature-sensitive magnetic body 6 and permanent magnets (hereinafter also simply referred to as magnets) 5a and 5b, whose magnetic characteristics change depending on temperature, is provided near the contact portion of the reed switch 2. It comprises a part 7. The temperature-sensitive magnetic body 6 and the magnets 5a and 5b are fixed to the outer peripheral surface of the housing body 4 via a cylindrical fixing metal fitting 33 that passes through the inner diameter side of each. As shown in FIG. 3, the fixing member 33 has a tubular shape as a whole having a gap (slit) 32, a flange-like stopper portion 33a for preventing the falling-off, and a bulging formation on the upper side. It is made of a non-magnetic material having a caulking portion 33c which is caulked and fixed to the container 4, and is positioned such that the lower side 33b is near the outer circumference of the reed switch 2. Incidentally, 33d indicates a crimping protrusion.

By the way, the lower end stopper portion 33a of the fixing member 33 is not limited to the flange shape, but may be formed by a cut-and-raised portion which is cut and raised outward as shown in FIG. With such a cut and raised portion, the slit 32 is formed.
It is possible to easily insert the temperature-sensitive magnetic body 6 and the magnets 5a and 5b by compressing the temperature-sensitive magnetic body 6 using an external force. Further, if the lower side 33b is tapered so as to be tapered downward as shown in FIG. 4, the temperature-sensitive magnetic body 6 and the magnets 5a and 5b can be inserted more easily.

Such a fixing member is obtained by cutting a non-magnetic metal plate by pressing and bending it into a predetermined shape. Then, the slit 32 is formed on the bent end facing surface. The slit 32 is configured so that liquid can enter between them, and heat can be transmitted from the inner diameter side of the temperature-sensitive magnetic body through the fixing metal fitting 33, and the liquid can directly contact the inner diameter surface of the temperature-sensitive magnetic body. It was done. Further, by utilizing these slits 32, the diameter side is made to have a spring effect and the diameter is made thin so that the temperature-sensitive magnetic body 6 and the magnets 5a and 5b can be easily inserted, and then the tip of the container is inserted. By doing so, the diameter is expanded, and the diameter of the stopper portion becomes larger than the inner diameters of the temperature-sensitive magnetic body 6 and the magnets 5a and 5b.
It is prevented from falling off, and is positioned reliably.

Therefore, the slit 32 may be formed at a plurality of locations. Further, the material of the fixing metal fitting 33 may be non-magnetic material such as stainless steel, phosphor bronze, brass, or other material, and may be subjected to surface treatment such as plating.

The lead wire or terminal 3a and the lead piece 2a of the reed switch 2 and the lead wire or terminal 3b and the lead piece 2b of the reed switch 2 are connected by connecting members 9a and 9b inside the housing 4, respectively. ing. As the connecting members 9a and 9b, a crimping terminal or a means such as soldering is used.

According to the temperature switch having the above-described structure, the temperature-sensitive magnetic body 6 and the magnets 5a, 5b are provided on the lower end of the fixing metal fitting 33 which passes through the inner diameter side of the temperature-sensitive magnetic body 6, and the stopper portion 33a for preventing the falling-off and the upper side. Since it is positioned in the vicinity of the outer circumference of the reed switch 2 by the caulking portion which is formed and is fixed to the housing body 4, it is fixed by filling an adhesive with the outer circumference of the housing body 4. No need.

According to the temperature switch having the above structure, the reed switch 2 has a waterproof structure (a structure in which water or oil does not enter) by the container 4 and a part of the connecting lead wires or terminals 3a, 3b. Of the reed switch 2 is inserted into the outer peripheral region of the accommodating body 4 corresponding to the contact portion formed by the tip ends of the reed pieces 2a and 2b of the reed switch 2 to prevent the reed switch 2 from falling off. Since the temperature-sensitive magnetic material and the magnet positioned and fixed by the non-magnetic fixing metal fitting 33 having the stopper portion for use and the caulking portion for caulking the accommodation body 4 are arranged, the exposed temperature-sensitive magnetic material is provided. In addition to the outer peripheral surface of, the heat is also transmitted from the inner diameter of the temperature-sensitive magnetic body through the fixing metal fitting 33. By this action, it is possible to respond instantly to changes in the external temperature.

Next, the operation of the temperature switch of the above embodiment will be described.

The temperature switch of the present invention in which the outer diameter of the temperature-sensitive magnetic body 6 is 8Φ and the operating temperature is 42 ° C. and the conventional temperature switch in which the operating temperature is 42 ° C. are each left in water of 40 ° C. for 5 minutes. Then, when these were put into water at 46 ° C., the time until operation (response time) was measured and compared.

As a result, in the case of this embodiment, the response time was 0.8 seconds, whereas in the case of the conventional temperature switch, it took 1.5 seconds. As described above, it was found that the temperature switch of the present embodiment is about twice as excellent in temperature response.

Further, when the temperature of the engine oil is detected, in the case of the conventional temperature switch, the temperature-sensitive magnetic body and the magnet are bonded and fixed to the housing of the reed switch, but the housing is made of resin and can be used. The agent is limited to epoxy type and the like which is not affected by oil. At this time, the adhesive such as epoxy is
Because of its hardness and lack of rubber elasticity, when it is exposed to high temperatures, the stress due to the thermal expansion of the adhesive deforms the container, which adds stress to the glass tube of the reed switch inside and also the temperature-sensitive magnetic material. Also, cracks occur when added to the magnet. As a result of the experiment, it was confirmed that the glass tube cracked or the temperature-sensitive magnetic material cracked around 90 ° C. Although it cannot be used under immersion conditions such as oil, when a silicone-based adhesive is used, silicone generally has good heat resistance and is rich in rubber elasticity, but has a large coefficient of thermal expansion. Cause a failure. On the other hand, in the case of the present embodiment, as described above, since no adhesive is used, there is no problem of cracking due to stress during thermal expansion of the adhesive even when exposed to high temperature. Therefore, it is possible to directly detect the temperature of a medium such as oil having a bad condition with good responsiveness, and it is suitable for the condition of high temperature detection and the condition of exposure to a high temperature atmosphere.

FIG. 5 shows a specific example of use of the temperature switch 1 of the present embodiment. For example, the temperature switch 1 set to an operating temperature of 43 ° C. and the heating switch are provided in the warm water tank 11 of the warm water washing toilet seat. Heater 12, a temperature control thermistor 13, and a liquid level sensor 14 are respectively incorporated, the temperature is detected by the thermistor 13, and the controller 15 controls the heater 12 to keep hot water at a constant temperature of 40 ° C. There is.

In such a hot water tank, when the internal temperature of the hot water tank 11 is raised more than necessary due to an abnormality of the controller 15 or the thermistor 13, when the temperature switch 1 reaches, for example, 43 ° C.,
This is immediately detected as an abnormal temperature and the controller 1
By operating 5 it is possible to prevent the risk of hot water coming into contact with the human body by controlling the temperature to a constant temperature.

The temperature switch can also be used to detect an abnormal temperature drop inside the hot water tank 11.

By the way, in the case of detecting the water temperature of the radiator of the automobile, since the water temperature in the radiator exceeds 90 ° C., the conventional temperature switch shown in FIG. 11 cannot be used, and the entire temperature switch is mounted and fixed. I used it by putting it in a metal case with screws. Therefore, there is a drawback that the metal case acts to dissipate heat and the heat response is poor.

Next, another embodiment of the present invention will be described with reference to FIGS.

As described above, the temperature switch 1 of the embodiment shown in FIG. 6 has a waterproof structure, is excellent in thermal response, and can be used under high temperature conditions. is there.

In the case of this embodiment, one lead piece 2b of the reed switch 2 is soldered to the tip of a metal case 50 having a screw 51 for mounting and fixing, and the other lead piece 2a is connected to an insulating plate 52. It is connected and fixed to the terminal 53 fixed by the eyelet terminal 54. A non-magnetic material having a stopper portion for preventing the stopper body from falling off and a caulking portion for caulking and fixing to the accommodating body 50 by inserting respective inner diameter sides into the outer peripheral region of the accommodating body 5 made of a metal case corresponding to the contact portion of the reed switch 1. It has a temperature-sensitive magnetic material and a magnet which are positioned and fixed by the fixing metal fitting 33.

Therefore, in addition to the exposed outer peripheral surface of the temperature-sensitive magnetic body, heat is also transmitted from the inner diameter of the temperature-sensitive magnetic body through the fixing metal fitting 33. As a result, it is possible to respond instantly to changes in the external temperature.

The temperature switch of FIG. 7 is the same as the embodiment of FIG. 6 in terms of fixing the reed switch and the like. Housing 5 made of a metal case that houses the reed switch inside
The temperature-sensitive magnetic body 6 and the magnets 5a and 5b are positioned on the outer periphery of 0 by a fixing member 56 made of a non-magnetic metal.
The fixing metal fitting 56 surrounds the temperature-sensitive magnetic body 6 and the magnets 5a and 5b, and the stopper portion 56a for preventing the falling and the caulking portion 56b formed on the upper side are caulked to the container to sense the reed switch inside the container. Positioning with the warm magnetic body 6 is performed. At this time, an adhesive is not filled between the temperature-sensitive magnetic body 6 and the magnets 5a and 5b and the outer periphery of the housing, but only a space is formed.

In the case of this embodiment, heat is transferred from the outer peripheral side of the temperature-sensitive magnetic body 6 through the fixing metal fitting 56, and also from the space between the temperature-sensitive magnetic body 6 and the container 50. , Works with good responsiveness. Caulking portion 5 of fixing bracket 56
6b has a small contact area with the entire housing 50, and since the fixing metal fitting 56 is made of a thin plate such as stainless steel, a metal case with a screw for fixing and fixing the entire temperature switch is used. However, heat does not escape to the metal case through the fixing metal fitting 56. Further, in the case of this embodiment, the outer circumferences of the temperature-sensitive magnetic body 6 and the permanent magnets 5a and 5b are protected by the fixing metal fittings 56, so that it is possible to prevent accidental bumping and damage during the mounting work.

FIG. 8 shows a fixing member 56 used in the embodiment shown in FIG. 7, in which a lower end of a cylindrical body is squeezed to form a caulking portion 56a, and a plurality of upper ends are provided at a plurality of positions. Caulking protrusion 56b (the figure shows a crimped state)
And a window 55 is provided on the intermediate peripheral surface. The window portion 55 enhances heat conductivity by direct contact of the liquid with the temperature-sensitive magnetic body, and improves temperature detection efficiency.

FIG. 9 shows another embodiment, in which the reed switch is accommodated in the outer circumference of the container 4 which is housed therein.
The temperature-sensitive magnetism that is positioned and fixed by a non-magnetic fixing metal fitting 33 that passes through each inner diameter side and has a stopper part 33a for preventing falling off at the lower end and a caulking part 33c for caulking and fixing to the accommodation body 4 formed on the upper side Body 6, two magnets 5
a, 6b and two non-magnetic material spacers 45a, 45b interposed between them, the reed switch contacts housed inside the housing body 4 at an operation set temperature accompanying temperature rise Is a normally open temperature switch that changes from an open state to a closed state.

Also in the case of this embodiment, the same operation and effect as the embodiment shown in FIGS. 1 and 2 are obtained.

In FIG. 10, the lead wires or terminals 3a and 3b for connection are connected to the reed switch 2 similarly to the above-mentioned embodiment, and some of the lead wires or terminals are exposed so that they can be connected to the outside. The reed switch 2 is housed in a resin container 4 having a bottom and a substantially cylindrical shape, and is fixed by a casting resin 8 filled from an opening of the container 4. On the outer periphery of the container 4, a non-magnetic non-magnetic material having a stopper portion 33a provided at the lower end for preventing falling and a caulking portion 33c for caulking and fixing the container 4 on the upper side through the respective inner diameter sides. The temperature-sensitive magnetic body 6, which is positioned and fixed by the fixing member 33, one magnet 5b (first magnet) and one nonmagnetic spacer 45b (first spacer), and another one magnet. 5a (second magnet) is positioned by a step formed inside the containing body 4, and a portion 4a of the containing body 4 between the permanent magnet 5a and the temperature-sensitive magnetic body 6 is connected to another non-magnetic material. Is configured as a spacer (second spacer).

Regarding the thermal response, the temperature switch is a normally open type temperature switch similar to the other embodiments described above, but a magnet and a non-magnetic material spacer installed on the outer periphery of the thin outer periphery of the container 4. The dimension part of can be shortened and the size can be reduced. Further, since the magnet 5a is positioned by providing a step inside the container, the dimensional accuracy between the magnet 5a and the spacer 4a is good and the variation is small. Moreover, since a separate spacer is not required, the number of parts can be reduced.

[0046]

According to the present invention described in detail above, the following effects can be obtained.

According to the temperature switch of the first aspect, in addition to the outer peripheral surface of the temperature-sensitive magnetic body being exposed, the medium is inserted through the fixing metal fitting and the slit portion formed on the fixing metal fitting, so that the medium can be sensed. Heat can be efficiently transmitted from the inner diameter side of the warm magnetic body, and a temperature switch having excellent thermal response can be provided.

Further, since the temperature-sensitive magnetic body and the magnet are positioned and fixed by the fixing metal fitting, it is not necessary to fill an adhesive or the like between the temperature-sensitive magnetic body and the magnet, and therefore the temperature-sensitive magnetic body due to thermal expansion at high temperature. The glass tube of the magnet and reed switch is not broken, and high temperature operation and high temperature atmosphere are possible. Furthermore, it can withstand immersion in oil or the like.

According to the temperature switch of the second aspect, in addition to the effect of the temperature switch of the first aspect, the temperature-sensitive magnetic body and the magnet can be mechanically protected.

According to the temperature switch of the third aspect, a normally open type temperature switch having the same effect as that of the first or second aspect can be obtained.

According to the temperature switch of the fourth aspect, the same effect as that of the first or second aspect can be achieved, and further, the total length can be reduced, and a part of the container is used as a spacer. A normally open temperature switch capable of reducing the number of points is obtained.

According to the temperature switch of the fifth aspect, the thermal response can be improved and mechanical protection can be achieved.

[Brief description of drawings]

FIG. 1 is a front view including a partial cross section showing an embodiment of a temperature switch of the present invention.

2 is a sectional view of the temperature switch of the embodiment of FIG.

FIG. 3 is a perspective view of an embodiment of a fixing bracket used in the present invention.

FIG. 4 is a perspective view of another embodiment of the fixing bracket used in the present invention.

FIG. 5 is a schematic diagram showing an example of use of the temperature switch of the present invention.

FIG. 6 is a cross-sectional view showing another embodiment of the temperature switch of the present invention.

FIG. 7 is a front view including a partial cross section showing another embodiment of the temperature switch of the present invention.

FIG. 8 is a perspective view showing a fixing bracket used in the embodiment of FIG.

FIG. 9 is a front view including a partial cross section showing a normally open type temperature switch according to another embodiment of the present invention.

FIG. 10 is a sectional view showing a normally open type temperature switch according to another embodiment of the present invention.

FIG. 11 is a schematic diagram showing a conventional example.

[Explanation of symbols]

 1 Temperature Switch 2 Reed Switch 3a, 3b Lead Wire 4 Housing 5a, 5b Permanent Magnet 6 Temperature Sensitive Magnetic Body 7 Reed Switch Drive 33 Fixing Metal 33a Stopper 33c Caulking 33d Caulking Projection

Claims (5)

[Claims] 1. An accommodating body that accommodates a reed switch in a waterproof structure so that only its connecting lead wires or terminals are exposed to the outside, and the reed switch that is disposed in an outer peripheral area of the accommodating body that corresponds to the reed switch. A reed switch drive unit composed of a temperature sensitive magnetic body that changes the magnetic path of the magnetic field to the reed switch due to the magnet acting on the magnetic field and the external temperature, and the inner diameter of the temperature sensitive magnetic body and the permanent magnet. And a container. The fixing bracket is made of a non-magnetic material and has a stopper portion at one end to prevent the stopper from falling off and a fixing portion to be fixed to the container on the side opposite to the stopper portion. And a temperature switch comprising: 2. An accommodating body that accommodates a reed switch in a waterproof structure so that only its connecting lead wires or terminals are exposed to the outside, and the reed switch that is disposed in an outer peripheral region of the accommodating body corresponding to the reed switch. A reed switch drive unit composed of a temperature sensitive magnetic body that changes the magnetic path of the magnetic field to the reed switch due to the magnet that acts on the magnetic field and the external temperature, and the outer circumference of the temperature sensitive magnetic body and the permanent magnet. And a fixing fitting made of a non-magnetic material, which is provided with a stopper portion for preventing falling off at one end and a fixing portion for fixing to the container on the side opposite to the stopper portion. Temperature switch. 3. A container housing a reed switch in a waterproof structure so that only the connecting lead wires or terminals are exposed to the outside, and the reed switch arranged in an outer peripheral region of the container corresponding to the reed switch. A reed switch drive unit including a temperature-sensitive magnetic body and a magnetic spacer whose magnetic characteristics change due to a magnet acting on a magnetic field and an external temperature to change the magnetic path of the magnetic field to the reed switch by the magnet, and the reed switch drive unit A temperature switch characterized in that it is fixed to the container via a magnetic fixing metal fitting. 4. An accommodating body that accommodates a reed switch in a waterproof structure in which only its connecting lead wires or terminals are exposed to the outside, and the reed switch that is disposed in an outer peripheral region of the accommodating body corresponding to the reed switch. The temperature-sensitive magnetic body and the first magnetic spacer, which change the magnetic characteristics of the first magnet for exerting a magnetic field and the external temperature to change the magnetic path of the magnetic field to the reed switch by the first magnet, are made of non-magnetic fixing metal fittings. The second magnet, which is fixed to the containing body and constitutes the reed switch driving unit together with the first magnet, the temperature-sensitive magnetic body, and the first spacer, is positioned and fixed at a step formed inside the containing body, and A temperature switch having a second spacer formed by the container protrusion located between the second magnet and the temperature-sensitive magnetic body. 5. A notch or a square hole is formed in at least a portion of the fixing metal fitting located in the temperature-sensitive magnetic body.
The temperature switch according to any one of items 1 to 4.