JP2687273B2 - Temperature sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature sensor using a thermistor, and more particularly to a temperature sensor for contacting a rotating object to be measured and measuring its surface temperature.

In a copying machine or the like, a copy paper on which an electrostatic latent image is formed is developed with toner and then heated by a fixing heat roller to fuse the toner to fix the image.

In order to stabilize the fixing action of the fixing heat roller, it is desirable that the surface temperature of the fixing heat roller is always controlled to a constant temperature determined by the toner and the paper. Therefore, it is necessary to measure the surface temperature, and a temperature sensor using a thermistor is widely used for this purpose.

The temperature sensor used for such a purpose is required to have a small change in the detected temperature due to the displacement of the mounting position and a small temperature measurement error.

[0005]

2. Description of the Related Art Conventionally, when the copying machine itself is large, a heat roller for fixing toner has a large outer diameter (for example, .phi.25). Therefore, a cushion material block such as sponge having a sufficient size as a heat insulating material can be used for the temperature sensor used for controlling the temperature of the heat roller. Therefore, although the shape of the temperature detecting portion becomes large, since the close contact with the heat roller is good, the error in the detected temperature does not often increase due to the displacement of the mounting position.

However, in recent years, with the downsizing of the equipment, there has been a strong demand for downsizing of each part used in the copying machine, and the heat roller has a small shape such as φ18. Things have come to be used.
Therefore, the temperature sensor for measuring the surface temperature of the heat roller is required to be downsized.

FIG. 6 illustrates a conventional miniaturized temperature sensor. FIG. 6A is a top view of a leaf spring portion and a resin molding portion before mounting the thermistor, and FIG. 6B is a leaf spring portion. Is a cross-sectional view including the upper surface of FIG.
Reference numeral 4 is a thermistor, 7 is a heat-resistant sheet, 14 and 15 are leaf springs that constitute a mounting portion of the thermistor 4 and a terminal portion, 1
Reference numeral 6 is a resin molded portion, and 17 is a lead wire of the thermistor 4.

As shown in the assembly view of FIG. 1C, this temperature sensor straddles the leaf springs 14 and 15 in a notch provided at the tip of two parallel leaf springs 14 and 15. A portion for accommodating the thermistor 4 and connecting two lead wires 17 of the thermistor 4 to the terminal portions along the leaf springs 14 and 15, respectively, and in contact with the heat roller on the surfaces of the thermistor 4 and the leaf springs 14 and 15. In addition, it has a structure in which the heat resistant sheet 7 is attached.

Since the temperature sensor shown in FIG. 6 does not use a large cushion block for supporting the thermistor, it has a small heat capacity and good response characteristics, and the thermistor 4 contacts the heat roller via the heat resistant sheet 7. Therefore, it has excellent wear resistance.

[0010]

The conventional miniaturized temperature sensor as shown in FIG. 6 has a large change in the detected temperature due to the displacement of the mounting position and the detected temperature even when the sensor is correctly mounted. There is a problem that the error of is large.

FIG. 7 shows an example of the characteristics of the temperature sensor. In the figure, A shows the relationship between the mounting position shift and the detected temperature in the conventional temperature sensor shown in FIG. Here, the (+) sign in the position shift indicates the case where the heat roller and the resin molding portion for attachment are displaced in the approaching direction, and the (-) sign indicates the case where they are displaced in the opposite direction. It is a thing.

FIG. 7 shows that the temperature of the heat roller is 160 ° C.
In the conventional temperature sensor, it is shown that the change in the detected temperature due to the displacement of the mounting position is large and the error from the true value of the detected temperature is large even when the temperature sensor is properly mounted.

The present invention is intended to solve such a problem of the prior art, and in a temperature sensor for measuring the surface temperature of a rotating object to be detected, a change in the detected temperature due to a displacement of a mounting position. The objective is to minimize the temperature and to make the detected temperature as close to the true value as possible.

Further, in the present invention, a structure of a temperature sensor is proposed which minimizes the displacement itself of the mounting position, and the connecting wire is pulled out from the temperature sensor without directly connecting the lead wire to the connector. The purpose is to be removable using.

[0015]

[Means for Solving the Problems]

(1) The leaf spring 1 and the two terminals 2 are insulated from each other by the resin molding portion 3 and integrally molded, and the thermistor 4 is attached to the tip of the leaf spring 1 so that the lead wire 17 is connected to one side of the leaf spring 1. The insulating sheet 6 attached to the surface of the plate spring is laid on and connected to the terminal 2. Further, one surface of the leaf spring 1 is covered and the heat resistant sheet 7A is attached, and another surface of the leaf spring 1 is attached to the other surface. The heat resistant sheet 7B is attached to form a temperature sensor.

(2) In the temperature sensor of (1), the cushion material piece 11 is bonded to the tip of one surface of the leaf spring 1, and the thermistor 4 is attached thereon.

(3) In the temperature sensor of (2), the metal foil 13 is inserted between the thermistor 4 and the cushion material piece 11.

(4) In the temperature sensor of (2) or (3),
Heat-resistant sheets 7A and 7B are integrated to form a heat-resistant sheet 7C
Is formed, and this is folded back and forth in the longitudinal direction of the leaf spring 1 and wound and glued.

(5) In the temperature sensor of any one of (1) to (4), the resin molding portion 3 is provided with a mounting hole 9 and a mounting position regulating projection 10.

(6) In the temperature sensor of any one of (1) to (5), the resin molding portion 3 is provided with the groove 12 for accommodating the lead wire 17 of the thermistor. (7) In the temperature sensor of any one of (1) to (6), terminal 2
Is composed of a prismatic or cylindrical pin to allow the temperature sensor to be connected to a connector.

[0021]

[Action]

(1) In the conventional temperature sensor shown in FIG. 6, the cause of the large change in the detected temperature due to the positional deviation is considered to be as follows. That is, in the temperature sensor of FIG. 6, the thermistor 4 for temperature detection has two leaf springs 14,
It is mounted so as to straddle 15 and has a structure in which the lower surfaces of the leaf springs 14 and 15 contact the surface of the heat roller.

Therefore, the heat roller having the smaller outer diameter and the leaf springs 14 and 15 are in contact with each other by one line. Therefore, it is good if the contact line and the position of the thermistor 4 match, but the installation position of the thermistor 4,
Alternatively, even if the mounting position of the temperature sensor itself deviates even a little, the position of this contact line occurs at a position distant from the thermistor 4, so that the temperature of the heat roller is transferred to the thermistor via heat conduction by the leaf springs 14 and 15 made of metal. Since it is detected by No. 4, it is unavoidable that a temperature gradient is generated, and the detected temperature becomes lower than that in the case of being in the correct position.

Even when the temperature sensor is mounted in the correct position, heat escapes toward the terminal having the lower temperature through the leaf springs 14 and 15, and the heat is also dissipated from the leaf spring surface. The temperature detected by the sensor is lower than the true value.

In order to solve such a problem, in the present invention, as shown in FIG. 2 (a) or 3 (a), for example, a sponge-like cushion having a large heat insulating property foamed on the leaf spring 1. The material piece 11 is attached, and the thermistor 4 is attached on the cushion material piece 11.

By doing so, the surface of the cushion material piece 11 is curved and adheres closely to the surface of the heat roller, so that the thermistor 4 or the temperature sensor itself can be attached to the thermistor 4 even if it is slightly displaced. No. 4 is always pressed against the surface of the heat roller, so that the detected temperature does not change due to the displacement of the mounting position.

Further, in this case, since the cushion material is a poor conductor of heat, the rate at which the heat of the heat roller escapes via the leaf spring is small, and therefore the temperature detected by the thermistor 4 is closer to the true value. Becomes

(2) Further, in the present invention, for example, as shown in FIG. 4, a thin plate material (foil) 13 made of a metal having a high thermal conductivity such as aluminum or copper is used for the thermistor 4 and the cushion material piece 11. The heat-receiving area for the thermistor 4 is increased by inserting the gap between the heat-absorbing portion and the heat-absorbing portion, and the heat collection efficiency is improved.

By doing so, it is possible to further reduce the change in the detected temperature due to the displacement of the mounting position, improve the responsiveness by improving the heat collection efficiency, and bring the detected temperature closer to the true value.

(3) If the temperature sensor is miniaturized and the detected temperature changes greatly due to the displacement of its mounting position, the temperature should be kept on the production line of the factory with a normal degree of caution. It is desirable to always be able to attach the temperature sensor to the correct position even if the sensor is attached.

In the present invention, as shown in FIG. 1 (d), a resin molding portion 3 for fixing the leaf spring 1 and the terminal 2 is attached with a screw for fixing the temperature sensor to a copying machine or the like. A hole 9 and a protrusion 10 for fixing the mounting direction of the temperature sensor are provided.

By doing so, the temperature sensor is supported at the two support points,
You can always keep the mounting position correct,
In this case, the mounting work is easy because only one screw needs to be tightened.

(4) When accuracy of the mounting position of the temperature sensor is required, in the case of the temperature sensor having the basic structure shown in FIG. 1, as shown in FIG. It is necessary that 1 and the resin molded portion 3 always maintain a fixed positional relationship and an angular relationship. For that purpose, the leaf spring 1 always keeps a correct flat surface, and There should be no twists.

In the present invention, as shown in FIG. 1 (a), a very small hole 8 is provided in a portion of the resin molding portion 3 corresponding to the leaf spring 1. The hole 8 is formed as a result of injecting the resin in a state where the plate spring 1 is suppressed and fixed by the two pins provided in the mold (not shown) when the resin molding portion 3 is molded. By
The leaf spring 1 can be fixed to the resin molded portion 3 so that the leaf spring 1 always has a correct positional relationship.

Further, in the present invention, the resin molding portion 3
2 thin grooves 12 are provided on the
It is configured to lead to the terminal 2 through 7.

As a result, when assembling the temperature sensor,
When connecting the thermistor 4 and the terminal 2, the thermistor 4
It is possible to prevent the lead wire 17 from being damaged.

(5) In the present invention, as shown in FIG. 1, FIG. 2, FIG. 4, and FIG. 5, the contact portion between the leaf spring 1 and the heat roller has a tape-shaped heat resistance which is smooth and has little wear. A sheet 7A or 7B is provided. Further, as shown in FIG. 2, a similar tape-shaped heat resistant sheet 7C is folded back up and down and wound around the contact portion between the leaf spring 1 and the heat roller.

The heat resistant sheets 7A, 7B and 7C electrically insulate the temperature sensor and the heat roller from each other, and when the temperature sensor is pressed against the rotating heat roller with a constant pressure, the heat sensor and the heat roller are not heated. It is provided to protect the roller and the wear from abrasion. In the conventional temperature sensor using the cushion material block, for the same purpose, the cushion material and the thermistor are wound one or more times in the lateral direction with respect to the rotation direction of the heat roller using a heat resistant tape. The structure to fix it was used.

On the other hand, in the present invention, the leaf spring 1
Glue heat-resistant sheets 7A and 7B consisting of two upper and lower adhesive tapes in the long axis direction, or fold and wind a heat resistant sheet 7C consisting of one adhesive tape in the long axis direction of the leaf spring 1. By sticking, the heat resistant sheet can be stably supported against the rotation of the heat roller, and the materials used can be saved.

(6) For the connection of the temperature sensor to the outside, a detachable structure is convenient for the purpose of assembly or maintenance. In the present invention, as shown in FIG. 5, a prismatic or cylindrical pin is used as the terminal 2, and the shape of the resin molding portion 3A is made slightly longer so that the pin 2 can be firmly fixed. , To be used as a connector.

In the conventional temperature sensor shown in FIG.
Since the individual leaf springs 14 and 15 were fixed by the resin molded portion 16 and the extension portions of the leaf springs 14 and 15 on the opposite side to the thermistor 4 were used as terminals, it was not possible to make a connector connection. According to the present invention, connector connection can be easily realized.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment (1) of the present invention, showing a basic form of a temperature sensor of the present invention.
Reference numeral 1 denotes a leaf spring made of a thin metal plate having elasticity such as stainless steel or phosphor bronze, and 2 denotes two terminals provided separately from the leaf spring 1. 3 is a resin molded portion for fixing the leaf spring 1 and the terminal 2, 4 is a thermistor housed in a notch provided at the tip of the leaf spring 1, 5 is a connecting portion between the lead wire of the thermistor 4 and the terminal 2, 6 Is a heat-resistant insulating sheet for insulating between the lead wire of the thermistor 4 and the leaf spring 1, 7A is a heat-resistant sheet provided on the upper surface of the leaf spring 1, and 7B is a heat-resistant sheet provided on the lower surface of the leaf spring 1. ,
8 is a hole formed to suppress the leaf spring during resin molding,
9 is a mounting hole for screwing the temperature sensor,
Reference numeral 10 is a protrusion for regulating the mounting direction of the temperature sensor, 12 is a groove for passing the lead wire of the thermistor, and 17 is a lead wire of the thermistor 4.

In FIG. 1, (a), (b), and (c) are top views of the leaf spring 1 before the temperature sensor is assembled, the terminal 2 and the resin molded portion 3, respectively, along the surface of the leaf spring 1. FIG. 2 is a cross-sectional view and a side cross-sectional view taken along the line AA ′ in FIG. 3A, in which a certain gap is provided between the leaf spring 1 and the terminal 2 so that mutual electrical insulation is sufficiently maintained. As shown in FIG.

The resin molding portion 3 has a mounting hole 9 for inserting a screw used for fixing the temperature sensor.
And a protrusion 10 for regulating the mounting direction of the temperature sensor. A hole for screwing (preferably tapped) and a hole for inserting the protrusion 10 are provided on the side of the device to which the temperature sensor is attached. By screwing the mounting holes 9 in the state of being aligned with the holes, the mounting position and mounting direction of the temperature sensor can be correctly determined.

Further, in FIG. 1, (d) and (e) respectively show a top view and a side view of the assembled temperature sensor. First, after attaching a thin heat-resistant insulating sheet 6 to the hatched portion of the upper surface of the leaf spring 1,
The thermistor 4 is set in the notch at the tip of the leaf spring 1 and fixed with resin. At this time, it is necessary to take care so that the resin does not rise too much.

Next, the lead wire 17 of the thermistor 4 is guided along the insulating sheet 6 into the groove 12 of the resin molding portion 3, and at the connection portion 5, the tip of the lead wire 17 is spot-welded, caulked or It is connected to the terminal 2 by means such as soldering. Furthermore, the thermistor 4 and the lead wire 1
7 and 7 are covered with a heat resistant sheet 7A for protection.

A heat resistant sheet 7B is attached to the lower surface of the leaf spring 1 to protect it. This is because the lower surface of the leaf spring 1 is pressed against the rotating heat roller.
This is to prevent the surface of the or thermistor 4 or the heat roller from being damaged or worn. Therefore, for the heat resistant sheet 7B, for example, a polyimide sheet or the like having sufficient heat resistance, smoothness, and abrasion resistance is used.

These heat-resistant sheets 7A, 7B, etc. are made by sticking a material made of an adhesive tape along the longitudinal direction of the leaf spring 1 so that the sheets are stable against rotation of the heat roller. Not only can it be supported, but the material used can be saved.

The basic type temperature sensor shown in FIG. 1 has a simple structure and is easy to manufacture, but the leaf spring 1 is in contact with the rotating heat roller via the heat resistant sheet 7B, and the thermistor 4 is used. Since it is in a state almost the same as when it is directly attached to the leaf spring 1, heat escapes through the leaf spring 1, so that the temperature detected by the thermistor 4 tends to be low and the response tends to be slow.

FIG. 2 shows an embodiment (2) of the present invention, in which the thermistor mounting method is improved in order to eliminate the drawbacks of the embodiment of FIG. FIG.
7A and 7B are heat-resistant sheets attached to the upper and lower surfaces of the leaf spring 1, and 11 is a cushion material piece made of foamed sponge or the like for attaching the thermistor 4. is there.

In FIG. 2, (a) and (b) are top views of the leaf spring 1, the terminal 2 and the resin molded portion 3 before the temperature sensor is assembled, and the side at AA 'in FIG. FIG. 2 is a cross-sectional view showing, as in the case of FIG. 1, a certain space is provided between the leaf spring 1 and the terminal 2 so that resin insulation is sufficiently maintained between them. It is fixed by the molding unit 3.

Further, the cushion material piece 11 is attached to the leaf spring 1.
Is attached to the tip of the upper surface of the plate spring 1, and a thin heat-resistant insulating sheet 6 is attached to the hatched portion of the upper surface of the leaf spring 1.
Attach.

In FIG. 2, (c) and (d) respectively show a top view and an enlarged side view of the assembled temperature sensor. First, the thermistor 4 is set on the upper part of the cushion material piece 11, and then the heat-resistant sheet 7A is placed thereon.
Attach and protect. A heat resistant sheet 7B is also attached to the lower surface of the leaf spring 1 to protect it.

The leaf spring 1 has a cushion material piece 1 on its upper surface.
Since the portion 1 is pressed against the rotating heat roller, the heat-resistant sheet 7A may damage the thermistor 4, the cushion material piece 11, or the surface of the heat roller,
Prevents wear and tear. For the heat resistant sheet 7A,
A polyimide sheet or the like having sufficient heat resistance, smoothness, and abrasion resistance is used.

These heat-resistant sheets 7A, 7B and the like can be stably supported against the rotation of the heat roller by sticking a material made of an adhesive tape along the longitudinal direction of the leaf spring 1. At the same time, the materials used can be saved.

FIG. 3 shows an embodiment (3) of the present invention, which is similar to the embodiment shown in FIG. 2, but the mounting surface of the thermistor is substantially aligned with the surface of the leaf spring. In the case of the structure described above, the same parts as those in FIG.

In FIG. 3, (a) and (b) are respectively a top view and a side view of the leaf spring 1, the terminal 2 and the resin molding portion 3 before the temperature sensor is assembled. The leaf spring 1 has a tip portion bent at a height corresponding to the thickness of the cushion material piece 11, and it is shown that the cushion material piece 11 is attached to this bent portion.

In FIG. 3, (c) and (d) respectively show a top view and an enlarged side view of the assembled temperature sensor. In this embodiment, since the tip end portion of the leaf spring 1 is bent and the cushion material piece 11 is attached, the attachment surface of the thermistor 4 and the surface of the leaf spring 1 are substantially aligned with each other. Further, the heat-resistant sheet 7 is attached to the tip of the leaf spring 1 including the cushion material piece 11.
C is folded up and down in the longitudinal direction of the leaf spring 1 and wound around and attached.

In the structure shown in FIG. 3, one heat-resistant sheet 7 is formed by covering the upper and lower surfaces of the thermistor 4 and the leaf spring 1.
Since C is folded up and down in the longitudinal direction of the leaf spring 1 and wound, the heat-resistant sheet can be stabilized against the rotation of the heat roller, and the number of manufacturing steps can be reduced. Instead of the heat resistant sheet 7C, as shown in FIG.
It goes without saying that two heat-resistant sheets, one above the other, may be used, as shown in the above example.

Other points are the same as in the case of the embodiment shown in FIG. Either the configuration shown in FIG. 2 or the configuration shown in FIG. 3 can be selected according to the structure of the copying machine to be applied.

In the embodiment shown in FIG. 2 or 3, the cushion material piece 11 is mounted on the leaf spring 1, and the thermistor 4 is mounted on the cushion material piece 11. The surface of is curved and closely adheres along the surface of the heat roller, and even if the mounting position of the thermistor 4 or the temperature sensor itself is slightly displaced, the thermistor 4 is always pressed against the surface of the heat roller. Therefore, the detected temperature does not change.

Further, in this case, since the cushion material is a poor conductor of heat, the rate at which the heat of the heat roller escapes via the leaf spring is small, and therefore the temperature detected by the thermistor 4 is closer to the true value. Becomes

FIG. 4 shows an embodiment (4) of the present invention, in which the heat collection efficiency for the thermistor is improved. The same parts as those in FIG. 2 are indicated by the same numbers, and 13 is a metal foil which is inserted between the thermistor 4 and the cushion material piece 11 and is made of aluminum or copper which is a metal having a high thermal conductivity.

In FIG. 4, (a) and (b) respectively show a top view and a side view of a state in which the temperature sensor is assembled. The metal foil 13 has a function of expanding a heat receiving area for the thermistor 4 and improving heat collection efficiency. The other points are similar to those of the embodiment shown in FIG.

In the embodiment shown in FIG. 4, the thermistor 4
Since the metal foil 13 is inserted between the cushion material piece 11 and the cushion material piece 11, the change in the detected temperature due to the displacement of the mounting position is further reduced, the responsiveness is improved by improving the heat collection efficiency, and the detected temperature is further improved. It becomes possible to approach the value.

In FIG. 7 described above, B shows the relationship between the mounting position deviation of the temperature sensor and the detected temperature in the embodiment shown in FIG. 4, and is the (+) sign in the position deviation. The meaning of the symbol (−) is the same as that in the case of FIG.

In FIG. 7, as can be seen by comparing the characteristic example of the conventional temperature sensor shown in A with the characteristic example of the temperature sensor according to the present invention shown in B, according to the present invention, the mounting of the temperature sensor is performed. The change in the detected temperature due to the positional deviation is small, and the error from the true value of the detected temperature in the case where it is properly attached is small.

FIG. 5 shows an embodiment (5) of the present invention, in which a connector facilitates attachment / detachment of a temperature sensor. The same parts as those in FIG. 1 are indicated by the same numbers, and 3A is a deformed resin molding portion.

In FIGS. 5A and 5B, FIGS. 5A and 5B are respectively a top view of the assembled temperature sensor and A of FIG.
-A 'is a side sectional view. Resin molding part 3
A is formed so as to be slightly longer than the resin molding portion 3 shown in FIG. 1. By embedding the terminal 2 formed of a prismatic pin or a cylindrical pin at the time of resin molding, the temperature sensor It is configured to be used by connector connection. Other points are the same as the embodiment shown in FIG.

In the embodiment shown in FIG. 5, since the temperature sensor is constructed in a connector type, at the time of assembly or maintenance, for connecting the temperature sensor, terminals such as soldering or spot welding are used. Since it is possible to easily attach and detach by simply attaching and detaching the connector without requiring work, it is possible to improve workability and maintainability of assembly. It goes without saying that the connectorization shown in the embodiment of FIG. 5 can be applied to the embodiments shown in FIGS.

In the embodiment shown in FIGS. 2, 4 and 5, the heat-resistant sheet 7 is used as in the case of FIG.
A single heat-resistant sheet may be used instead of A and 7B, and the leaf spring 1 may be folded up and down in the longitudinal direction and wrapped around to be attached, whereby the heat-resistant sheet against rotation of the heat roller. Can be stabilized, and the number of manufacturing steps can be reduced.

[0071]

As described above, according to the present invention, in a temperature sensor used for measuring the surface temperature of a rotating object to be detected in a copying machine or the like, the thermistor for temperature detection is a poor heat conductor. Since it is attached to the leaf spring via the cushion material piece, the thermal resistance between the leaf spring and the leaf spring can be increased, and the adhesion of the thermistor and the heat roller can be improved by the cushion material having elasticity. Since it is improved, the change in the detected temperature due to the displacement of the mounting position of the temperature sensor is reduced, and the error from the true value of the detected temperature is reduced. Furthermore, a metal foil can be inserted between the thermistor and the cushioning material to improve the heat collection efficiency, which can further enhance the above-mentioned effect.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment (1) of the present invention.

FIG. 2 is a diagram showing an embodiment (2) of the present invention.

FIG. 3 is a diagram showing an embodiment (3) of the present invention.

FIG. 4 is a diagram showing an embodiment (4) of the present invention.

FIG. 5 is a diagram showing an embodiment (5) of the present invention.

FIG. 6 is a diagram illustrating a conventional miniaturized temperature sensor.

FIG. 7 is a diagram showing a characteristic example of a temperature sensor.

[Explanation of symbols]

 1 leaf spring 2 terminal 3 resin molding part 4 thermistor 6 insulating sheet 7A heat resistant sheet 7B heat resistant sheet 7C heat resistant sheet 9 mounting hole 10 protrusion 11 cushion material piece 12 groove 13 metal foil 17 lead wire

Continuation of the front page (56) Reference JP-A-4-289421 (JP, A) JP-A-55-166901 (JP, A) Actually open 5-19929 (JP, U) Actually open 63-163432 (JP , U) Actually open 61-42437 (JP, U) Actually open 59-66125 (JP, U) Actually open 55-122130 (JP, U)

Claims (7)

(57) [Claims] 1. A leaf spring (1) and two terminals (2) are integrally molded by being insulated from each other by a resin molding portion (3),
The thermistor (4) is attached to the tip of the leaf spring (1), and its lead wire (17) is laid on one surface of the leaf spring (1) and laid over the insulating sheet (6), and the terminal ( 2)
And heat-resistant sheet (7A) is attached to cover one side of the leaf spring (1), and another heat-resistant sheet (7B) is attached to the other side of the leaf spring (1). A temperature sensor characterized by being attached. 2. The temperature sensor according to claim 1, wherein
A temperature sensor characterized in that a cushion material piece (11) is adhered to the tip of one surface of the leaf spring (1), and the thermistor (4) is attached thereon. 3. The temperature sensor according to claim 2, wherein
A temperature sensor characterized in that a metal foil (13) is inserted between the thermistor (4) and the cushion material piece (11). 4. The temperature sensor according to claim 2 or 3, comprising a heat resistant sheet (7C) in which the heat resistant sheets (7A) and (7B) are integrated, and the heat resistant sheet (7C). A temperature sensor, which is folded back up and down in the longitudinal direction of the leaf spring (1) and wound and glued. 5. The temperature sensor according to claim 1, wherein the resin molding portion (3) has a mounting hole (9) and a mounting position regulating protrusion (10). A temperature sensor characterized in that 6. The temperature sensor according to claim 1, wherein the resin molding portion (3) has a groove (12) for accommodating a lead wire (17) of the thermistor. Temperature sensor. 7. The temperature sensor according to claim 1, wherein the terminal (2) is formed by a prismatic or cylindrical pin, and the temperature sensor is connectable to a connector. And a temperature sensor.