JP7125355B2 - temperature sensor device - Google Patents

Description

The present invention relates to a temperature sensor device.

As a temperature sensor device for detecting the temperature of a test object such as a battery, the measurement protrusion is inserted through a mounting hole provided in the battery case, and the temperature detection element provided at the tip of the measurement protrusion is attached to the battery body. A structure is known in which a contact is made by inserting it into a mounting hole provided. In this temperature sensor device, the measurement protrusion has a resin spring portion, and the temperature detection element is sealed at the tip of the spring portion (see, for example, Patent Document 1).

Japanese Patent No. 5828279

Some objects of temperature monitoring devices installed outdoors cannot be machined such as a threaded portion into which a fastening member for fixing a temperature sensor device is threaded. Although the temperature sensor device described in Patent Literature 1 requires a mounting hole to be provided in the battery body, it cannot be applied to a measurement object for which a mounting hole cannot be provided in the subject.
Therefore, in order to fix the temperature sensor device to such a subject, the temperature sensor device is arranged on the subject, and a lashing member is arranged on the outer circumference surrounding the subject and the temperature sensor device to fix the temperature sensor device. A structure is conceivable in which the temperature sensor device is fixed by being pressed against the subject by a binding member.
In the temperature sensor device described in Patent Literature 1, the structure is such that the temperature detection element is sealed with resin. Therefore, a load is applied to the temperature sensor device when it is secured, and the temperature detection element may be damaged.

A temperature sensor device according to the present invention comprises a temperature detecting element for measuring a temperature of an object to be measured, a housing containing the temperature detecting element and having an outer surface pressed against the object to be measured, and provided inside the housing, an urging member that presses the temperature detecting element against the object to be measured; and the housing is provided with an opening that brings the temperature detecting element urged by the urging member into contact with the object to be measured.

According to the present invention, the load on the temperature detection element is reduced by the biasing member, and damage to the temperature detection element can be suppressed.

FIG. 1 is an external perspective view showing a first embodiment of the temperature sensor device of the present invention. 2 is an exploded perspective view of the temperature sensor device illustrated in FIG. 1. FIG. FIG. 3(a) is a cross-sectional view showing an example of a state in which the temperature sensor device shown in FIG. 1 is mounted on a surface to be measured, and FIG. It is a cross-sectional view. FIG. 4 is a cross-sectional view showing another example in which the temperature sensor device shown in FIG. 1 is attached to the surface to be measured. FIG. 5 is an exploded perspective view showing a second embodiment of the temperature sensor device of the present invention. 6(a) is a cross-sectional view showing the state before the temperature sensor device shown in FIG. 5 is attached to the surface to be measured, and FIG. 6(b) is a temperature sensor shown in FIG. It is a cross-sectional view showing a state in which the device is mounted on the surface to be measured. FIG. 7 is a sectional view showing a third embodiment of the temperature sensor device of the invention. FIG. 8 is a sectional view showing a fourth embodiment of the temperature sensor device of the invention. FIG. 9 is an external perspective view showing Modification 1 of the case of the present invention. FIG. 10 is an external perspective view showing Modification 2 of the case of the present invention. FIG. 11 is an external perspective view showing Modification 3 of the case of the present invention. FIG. 12 is an external perspective view showing Modification 4 of the case of the present invention. FIG. 13 is an external perspective view showing Modification 5 of the case of the present invention. FIG. 14 shows a modification of the water intrusion prevention structure provided in the case shown in FIG. 3 of the present invention, and FIG. 14(b) is a cross-sectional view corresponding to FIG. 3(b).

- 1st embodiment -
A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.
FIG. 1 is an external perspective view showing a first embodiment of the temperature sensor device of the present invention, and FIG. 2 is an exploded perspective view of the temperature sensor device shown in FIG. FIG. 3(a) is a cross-sectional view showing an example of a state in which the temperature sensor device shown in FIG. 1 is mounted on a surface to be measured, and FIG. It is a cross-sectional view.
The temperature sensor device 10 includes a housing (hereinafter referred to as case) 20 , a leaf spring 31 and a temperature detection element 41 .
The case 20 is made of resin or metal such as stainless steel (SUS). The case 20 has a flat lid portion 21, a pair of side portions 22a and 22b (see FIG. 3(b)), and an end portion 23 (see FIG. 3(a)). The case 20 has a housing space 24 formed inside by a lid portion 21, a pair of side portions 22a and 22b, and an end portion 23, and a temperature detecting element 41 is housed in this housing space 24. As shown in FIG. The case 20 has a contact opening 24a on the bottom side, and the accommodation space 24 communicates with the contact opening 24a. The case 20 also has an end opening 24b facing the end 23, and the housing space 24 also communicates with the end opening 24b.

A concave portion 51 is provided in the lid portion 21 of the case 20 . The recess 51 has a flat bottom surface and a uniform depth over the entire region of the recess 51 . A fixing member 61 (see FIG. 3) such as a binding band is wound through the recess 51, and the temperature sensor device 10 is pressed by the fixing member 61 and fixed onto the surface 91 (see FIG. 3) to be measured. . Details will be described later.

The leaf spring 31 is made of metal. However, it can also be made of resin.
A fixing hole 31d is formed in one end 31a of the leaf spring 31 . As shown in FIG. 3A, the leaf spring 31 is fixed to the inner surface of the lid portion 21 of the case 20 by a fastening member 63 such as a bolt or screw inserted through the fixing hole 31d. As shown in FIG. 2, the leaf spring 31 has an inclined portion 31c inclined from one end 31a toward the other end 31b on the opposite side. The inclined portion 31 is an inclined surface that descends from the inner surface side of the lid portion 21 toward the temperature detecting element 41 side.
Although FIG. 2 illustrates a structure in which the other end 31b of the plate spring 31 is bent with respect to the inclined portion 31c, the inclined portion 31c may extend as it is without providing a bent portion.

The temperature detection element 41 is formed of a thermistor, a temperature-measuring resistor, or the like, and has a cylindrical outer shape. Two connection leads 42 are connected to the temperature detection element 41 . The shape is not limited to a columnar shape, and may be a rectangular parallelepiped shape.

Referring to FIGS. 3(a) and 3(b), the temperature sensor device 10 measures an object (temperature measurement object) whose temperature is to be monitored, for example, an obstacle inspection device installed at a railroad crossing, an impedance bond, or the like. It is fixed on the target surface 91 . The temperature detection element 41 is housed in the housing space 24 of the case 20 so that its circumferential surface in the longitudinal direction is in contact with the surface 91 to be measured. Inside the case 20, a pair of protrusions 25 are provided that protrude from the inner surface of the side portion 22a toward the connection lead 42 side. The pair of protrusions 25 and the case 20 are integrally formed. The connection lead 42 is inserted between the pair of protrusions 25 and led out from the end opening 24b.

The temperature detection element 41 is housed in the housing space 24 of the case 20 so as to be pressed against the surface 91 to be measured by the plate spring 31 fixed inside the case 20 by the fastening member 63 . When the fixing member 61 presses the case 20 against the surface 91 to be measured, the temperature detection element 41 is pressed against the surface 91 to be measured and fixed. In this fixed state, the peripheral surface of the temperature detection element 41 is pressed against the measurement target surface 91 by the biasing force of the plate spring 31 with a predetermined pressure. The fixing member 61 is, for example, a binding band, which passes through the concave portion 51 of the case 20 and is wound around the outer periphery of the subject, thereby attaching the temperature sensor device 10 to the subject. Although not shown, the lashing band, which is the fixing member 61, has a locking portion at an intermediate portion in the longitudinal direction of the band. be. A force acts on the temperature sensor device 10 in the +X direction or the -X direction indicated by the arrows, such as when the connection lead 42 is pulled. However, the side surface of the concave portion 51 contacts the side portion of the fixing member 61, and the movement in the +X direction or the -X direction is restricted.

Note that the fixing member 61 is not limited to the binding band. For example, a lashing structure in which the temperature sensor device 10 and the subject are surrounded by a frame member and tightened by the frame member may be used.
Moreover, the fixing member 61 can be formed of a resin material, or can be formed of a metal material. If the fixing member 61 is made of a conductive member such as a metal material, the fixing member 61 may come into contact with the conductive members and cause a short circuit when the fixing member 61 is used to fasten the temperature sensor device 10 to the subject. may occur. In addition, the fixing member 61 may be cut due to deterioration and released from lashing, which may cause the conductive members to come into contact with each other and cause a short circuit. Therefore, when the test object is an impedance bond, there is a risk that the impedance bonds will be short-circuited. In preparation for such a case, it is preferable to form the case 20 from an insulating resin in a temperature sensor device, such as an impedance bond, which is applied to a subject in which a short circuit occurs due to the conductive fixing member 61 . However, if the subject is an obstacle inspection device, the case 20 may be made of metal because there is no problem of short circuit.

(Device damage prevention function)
When the temperature sensor device 10 is lashed and fixed by the fixing member 61 , a large load is applied to the lid portion 21 of the case 20 of the temperature sensor device 10 mounted on the surface 91 to be measured. For this reason, the central portion of the lid portion 21 of the case 20 is bent so as to protrude toward the temperature detection element 41, and the temperature detection element 41 may be damaged.

In this embodiment, there is a gap between the upper surface of the temperature detection element 41, in other words, the surface opposite to the measurement target surface 91, and the inner surface of the lid portion 21 of the case 20, and the temperature detection element 41 is , is pressed against the surface 91 to be measured by a leaf spring 31 . Therefore, even if the lid portion 21 is bent so as to protrude toward the temperature detection element 41, the leaf spring 31 is bent corresponding to the amount of deformation of the lid portion 21, and the spring force increases. Do not touch the sensing element 41 directly. Therefore, damage to the temperature detection element 41 can be suppressed.

(water intrusion prevention function)
The pair of protrusions 25 provided on the case 20 have a pull-out prevention function to prevent the temperature detection element 41 from being pulled out in the direction of the arrow +X, and also prevent water entering the case 20 from the end opening 24b of the case 20. , has a water intrusion suppressing function of suppressing water from flowing into the area where the temperature detecting element 41 is arranged in the accommodation space 24 .
As shown in FIGS. 3A and 3B, raised portions 25 are provided on the inner surfaces of the side portions 22a and 22b of the case 20, respectively. The pair of protrusions 25 are separated in the X direction by a length that is smaller than the outer diameter of the temperature detection element 41 and through which the pair of connection leads 42 are inserted. Each raised portion 25 has a lower surface flush with the lower surfaces of the side portions 22 a and 22 b of the case 20 and an upper surface separated from the inner surface of the lid portion 21 of the case 20 . Therefore, the pair of protrusions 25 can prevent the temperature detection element 41 from being pulled out of the housing space 24 of the case 20 .

In this way, the pair of protrusions 25 has an open space that opens the accommodation space 24 instead of a structure that closes the accommodation space 24 . Further, as described above, the end portion opening 24b is formed at the end portion of the case 20 . Accordingly, an external open space is formed on the connection lead 42 side of the case 20 to open the housing space 24 to the outside.

When the temperature sensor device 10 is fixed on the measurement target surface 91 of the subject under the natural environment, rainwater may enter the housing space 24 of the case 20 through the end opening 24b of the case 20. be. Alternatively, rainwater may also enter through the contact opening 24a. The water that enters the case 20 through the end opening 24b of the case 20 naturally evaporates in the course of flowing from the end opening 24b to the pair of protrusions 25. As shown in FIG. Therefore, it is possible to prevent water that has entered the case 20 from the end opening 24b of the case 20 from flowing into the case 20 beyond the pair of raised portions 25 . That is, the pair of protruding portions 25 has a function of suppressing rainwater from flowing into the area in the housing space 24 where the temperature detecting element 41 is arranged.
Thus, the temperature sensor device 10 according to the present embodiment has a water intrusion suppression structure on the root side of the connection lead 42 connected to the temperature detection element 41 .

In addition, dew condensation may occur on the surface of the temperature detection element 41 , the measurement target surface 91 of the metallic test object, and the inner surface of the metallic case 20 . Such water droplets generated by condensation within the housing space 24 are also evaporated in the external open space provided on the connection lead 42 side of the case 20 . Alternatively, rainwater may also enter through the contact opening 24a.

If the end opening 24b of the case 20 is blocked, when water enters the housing space 24 of the case 20, the water cannot be discharged, resulting in adverse effects such as deterioration in temperature detection performance. . In this embodiment, an external open space is provided on the side of the end opening 24b of the case 20 so that water that has entered can be drained. However, by providing the external open space, it becomes easier for water to enter from the external open space. In order to deal with this, a raised portion 25 is provided inside the end opening 24b of the case 20 to provide a water intrusion suppression structure in which intruding water naturally evaporates.
As described above, in the present embodiment, an external opening is provided for draining the water that has flowed into the housing space 24 of the case 20, and a water intrusion suppression structure is provided to suppress the intrusion of water from the external opening. . Therefore, there is an effect that the harmful effects caused by water entering the housing space 24 of the case 20 can be alleviated.

In other words, a wall may be provided on the surface facing the end portion 23 of the case 20, a through hole may be provided in the wall for drawing out the connection lead wire 42 of the temperature detecting element 41, and the through hole may be water-sealed. . However, with such a structure, water entering through the contact opening 24a and water droplets generated by condensation inside the case cannot be discharged to the outside, which may affect the durability of the temperature sensor device 10. Therefore, as described above, the end opening 24b is provided to improve the drainage function inside the case 20 .

FIG. 4 is a cross-sectional view showing another example in which the temperature sensor device shown in FIG. 1 is attached to the measurement target surface of the subject.
In the wearing form shown in FIG. 4, the measurement target plane 91 of the subject is a vertical plane parallel to the direction of gravity. Therefore, when the temperature sensor device 10 is mounted on the measurement target surface 91 with the connection lead wire 42 directed vertically, it is difficult to enter the case 20 through the end opening 24b of the case 20 . In addition, water that has entered the housing space 24 of the case 20 and water droplets that have condensed in the housing space 24 are easily led to the outside open space side. Therefore, the mounting posture illustrated in FIG. 4 is preferable in terms of waterproofing.
Other structures of the mounting structure shown in FIG. 4 are the same as the mounting structure shown in FIG.

According to the above embodiment, the following effects are obtained.
(1) The temperature sensor device 10 includes a temperature detecting element 41 that measures the temperature of an object to be measured, a case 20 that houses the temperature detecting element 41 and has an outer surface that is pressed against the object to be measured, and a , and a leaf spring 31 for pressing the temperature detection element 41 against the object to be measured. The case 20 is provided with a contact opening 24a for bringing the temperature detection element 41 urged by the leaf spring 31 into contact with the object to be measured. . In this manner, the temperature detection element 41 housed in the case 20 press-fixed to the object to be measured is pressed against the object to be measured by the leaf spring 31, so that the load on the temperature detection element 41 is reduced and the temperature is reduced. Damage to the detection element 41 can be suppressed.

(2) The outer surface of the case 20 is provided with the concave portion 51 that restricts movement of the fixing member 61 that fixes the temperature detection element 41 to the surface 91 to be measured. Therefore, the fixing member 61 provided in the recess 51 prevents the temperature detecting element 41 from moving, and the fixing of the temperature sensor device 10 can be ensured.

(3) A water intrusion suppression structure is provided on the case 20 on the side of the connection lead 42 connected to the temperature detection element 41 to suppress the intrusion of water into the external open space and the housing space 24 . Therefore, the water in the housing space 24 of the case 20 can be discharged, and the inflow of water into the housing space 24 of the case 20 from the external open space can be suppressed.

- Second Embodiment -
FIG. 5 is an exploded perspective view showing a second embodiment of the temperature sensor device of the present invention. 6(a) is a cross-sectional view showing the state before the temperature sensor device shown in FIG. 5 is attached to the surface to be measured, and FIG. 6(b) is a temperature sensor shown in FIG. It is a cross-sectional view showing a state in which the device is mounted on the surface to be measured.
The second embodiment differs from the first embodiment in that the case 20 has a holding portion 27 for holding the temperature detection element 41, and the temperature detection element 41 is pulled out. The point is that it has a pull-out prevention member 65 to prevent it.

Holding portions 27 are provided at the ends of the side portions 22 a and 22 b of the case 20 facing the surface 91 to be measured. The holding portion 27 has a function of holding the temperature detecting element 41 in the case by contacting the outer peripheral surface of the temperature detecting element 41 . 6(a) and 6(b), the shape of the end surface of the holding portion 27 facing the outer peripheral surface of the temperature detecting element 41 is concentric with the circle of the outer peripheral surface of the temperature detecting element 41. is formed in That is, the ends of the case side portions 22a and 22b are bent inward, and slopes having curved surfaces corresponding to the peripheral shape of the temperature detecting element 41 are provided on the end faces of the end portions, and the width is narrower than that of the first embodiment. A contact opening 24a is provided. The temperature detection element 41 is pressed by the leaf spring 31, and before the temperature sensor device 10 is mounted on the surface 91 to be measured, a part of the temperature detection element 41 is attached to the case 20 as shown in FIG. 6(b). protrudes outside from the contact opening 24a.
Instead of bending the ends of the case side portions 22a and 22b inward, the inner surfaces of the end portions of the case side portions 22a and 22b may be provided with slopes having a curved surface corresponding to the shape of the peripheral surface of the temperature detection element 41. .

When the temperature sensor device 10 is mounted on the surface 91 to be measured from the state before mounting shown in FIG. It comes into contact with the surface 91 and moves upward in the accommodation space 24 of the case 20 to deform the leaf spring 31 . In this state, there is a gap between the surface of the temperature detection element 41 opposite to the surface 91 to be measured and the inner surface of the lid portion 21 of the case 20 . Also, the temperature detection element 41 is pressed onto the measurement target surface 91 by the leaf spring 31 . Therefore, also in the second embodiment, the mounting state is the same as in the first embodiment.

The pair of protrusions 25 provided in the first embodiment are not provided inside the case 20 . In the second embodiment, in order to accommodate the temperature detection element 41 in the accommodation space 24 of the case 20 , the temperature detection element 41 is inserted through the end opening 24 b of the case 20 .
After that, the pull-out preventing member 65 is fitted from the end opening 24b of the case 20. As shown in FIG.

The pull-out preventing member 65 is a C-ring having a notch 65a. The outer shape of the pull-out prevention member 65 is similar to an ellipse inscribed in the inner surface of the rectangle surrounded by the end opening 24 b of the case 20 and the surface 91 to be measured. However, the pull-out prevention member 65 and the end opening 24b of the case 20 have an interference fit relationship, and the outer shape of the pull-out prevention member 65 is formed slightly larger than the ellipse inscribed in the end opening 24b. . Therefore, the pull-out prevention member 65 is press-fitted into the end opening 24b of the case 20 while being deformed so that the notch 65a becomes smaller. Before the pull-out prevention member 65 is press-fitted into the end opening 24b of the case 20, the connection lead 42 is inserted into the inner opening 65b of the pull-out prevention member 65 via the notch 65a.

The internal opening 65 b of the pull-out prevention member 65 is formed to have a size that creates a space between it and the connection lead 42 . Therefore, also in the second embodiment, there is an external open space formed by the pull-out prevention member 65 and the end opening 24b of the case 20. As shown in FIG.

Other configurations of the second embodiment are similar to those of the first embodiment. Therefore, in the second embodiment, the same effects (1) to (3) as in the first embodiment are obtained.
In addition, in the second embodiment, the temperature detection element 41 can be a unit accommodated in the accommodation space 24 of the case 20, so that it is possible to efficiently carry out handling and work such as transportation and mounting. . In the first embodiment, the width of the contact opening 24a is larger than the diameter of the temperature detecting element 41, and the temperature detecting element 41 falls out of the contact opening 24a. In the second embodiment, the width of the contact opening 24a is made smaller than the diameter of the temperature detection element 41 to prevent the temperature detection element 41 from coming off the case. In addition, in order to prevent the temperature detection element 41 from coming off after it is mounted in the case through the end opening 24b, a pull-out preventing member 65 is attached to the end opening 24b. Unitization is realized by adopting such a structure.
In addition, in the second embodiment, the pull-out preventing member 65 may be an O-ring. When an O-ring is used, the O-ring is press-fitted into the end opening 24b of the case 20 after the connection lead 42 is inserted into the internal space of the O-ring from the tip side.

-Third Embodiment-
FIG. 7 is a sectional view showing a third embodiment of the temperature sensor device of the invention.
The third embodiment has a structure in which the plate spring 32 is integrated with the resin case 20 by insert molding.
In FIG. 7, the leaf spring 32 has a shape indicated by a chain double-dashed line before the temperature sensor device 10 is mounted on the surface 91 to be measured. A temperature detection element 41 is mounted on a surface 91 to be measured, a case 20 integrated with a plate spring 32 is arranged on the temperature detection element 41, and the temperature sensor device is mounted on the surface 91 to be measured by a fixing member 61. 10 is fixed.

In this state, there is a gap between the surface of the temperature detection element 41 opposite to the surface 91 to be measured and the inner surface of the lid portion 21 of the case 20 . Also, the temperature detection element 41 is pressed onto the measurement target surface 91 by the plate spring 32 . Therefore, also in the third embodiment, the mounting state is the same as in the first embodiment.

Other configurations of the third embodiment are similar to those of the first embodiment. Therefore, in the third embodiment, the same effects (1) to (3) as in the first embodiment are obtained.
In addition, in the third embodiment, the leaf spring 32 and the case 20 are integrated by insert molding, so that the fastening member 63 can be omitted and the number of assembling steps can be reduced, thereby reducing costs. can.

-Fourth Embodiment-
FIG. 8 is a sectional view showing a fourth embodiment of the temperature sensor device of the invention.
The case 20 of the fourth embodiment has a structure in which a plate spring 33 is integrated by molding.
The leaf spring 33 has a shape indicated by a chain double-dashed line before the temperature sensor device 10 is mounted on the surface 91 to be measured. A temperature detection element 41 is mounted on a surface 91 to be measured, a case 20 integrated with a leaf spring 33 is arranged on the temperature detection element 41, and a temperature sensor device is mounted on the surface 91 to be measured by a fixing member 61. 10 is fixed.

In this state, there is a gap between the surface of the temperature detection element 41 opposite to the surface 91 to be measured and the inner surface of the lid portion 21 of the case 20 . Further, the temperature detection element 41 is pressed onto the measurement target surface 91 by the leaf spring 33 . Therefore, also in the fourth embodiment, the mounting state is the same as in the first embodiment.

Other configurations of the fourth embodiment are similar to those of the first embodiment. Therefore, in the fourth embodiment, the same effects (1) to (3) as in the first embodiment are obtained.
Further, in the fourth embodiment, the leaf spring 33 and the case 20 are integrated by molding. Therefore, the cost can be further reduced than in the third embodiment in which the plate spring 31 and the case 20 are integrated by insert molding.

In the above embodiment, the lid portion 21 of the case 20 is provided with the concave portion 51, and the fixing member 61 is fitted into the concave portion 51 to prevent the temperature sensor device 10 from moving. That is, the structure exemplifies the concave portion 51 as the movement restricting portion provided in the case 20 . However, the structure of the movement restricting portion can be modified in various manners other than the above-described manner.
Below, an example of the mode of the movement control part provided in case 20 is shown.

(Case modification 1)
FIG. 9 is an external perspective view showing Modification 1 of the case of the present invention.
In Modified Example 1 shown in FIG. 9 , the movement restricting portion provided on the case 20 is provided as a pair of projecting portions 52 .
Each protruding portion 52 has a columnar shape and is provided on the top surface of the lid portion 21 at intervals at which a fixing member 61 (indicated by a two-dot chain line) is inserted. Therefore, the side surface of each projecting portion 52 abuts against the fixing member 61, thereby restricting movement of the temperature sensor device 10 in the -X direction or the +X direction.
Other configurations of the case 20 of Modification 1 are the same as those of the first embodiment.

It should be noted that the shape of the projecting portion 52 is not limited to a cylindrical shape, and various shapes can be used. For example, the shape of the protrusion 52 can be a prism, a truncated cone, or a truncated pyramid. Also, the protrusions 52 may be provided in a plurality of pairs rather than in one pair. Furthermore, the protruding portion 52 can also be shaped like a band extending along the longitudinal direction of the fixing member 61 .

(Case modification 2)
FIG. 10 is an external perspective view showing Modification 1 of the case of the present invention.
In Modified Example 2 shown in FIG. 10 , the movement restricting portion provided on the case 20 is provided as one projecting portion 52 .
The temperature sensor device 10 is normally moved by pulling the connection lead 42 . That is, the temperature sensor device 10 moves in the +X direction by pulling the connection lead 42 . In order to prevent this, the projecting portion 52 should be formed so as to prevent the temperature sensor device 10 from moving in the +X direction. In FIG. 10 , a projecting portion 52 is provided on the side portion 61 a side opposite to the +X direction of the fixing member 61 provided on the upper surface of the lid portion 21 of the case 20 .
Therefore, the movement of the temperature sensor device 10 in the +X direction is restricted by the temperature sensor device 10 coming into contact with the side portion 61a of the fixed member 61 opposite to the +X direction.
Other configurations of the case 20 of Modification 2 are the same as those of the first embodiment.

(Case modification 3)
FIG. 11 is an external perspective view showing Modification 3 of the case of the present invention.
In Modified Example 3 shown in FIG. 11 , the movement restricting portion provided in the case 20 is provided as a concave portion 53 .
In the first embodiment, the recess 51 provided in the case 20 has a flat bottom surface. On the other hand, the concave portion 53 of the third embodiment has an arcuately curved bottom surface. Also in the third embodiment, the curved surface of the concave portion 53 abuts the side portion of the fixing member 61 to restrict movement of the temperature sensor device 10 in the +X direction or the −X direction.
Other configurations of the case 20 of Modification 3 are the same as those of the first embodiment.

(Modification 4 of the case)
FIG. 12 is an external perspective view showing Modification 4 of the case of the present invention.
In Modified Example 4 shown in FIG. 12 , the movement restricting portion provided in the case 20 is provided as a chamfered portion 54 provided in the longitudinally intermediate portion of the pair of corner portions of the lid portion 21 .
The fixing member 61 deforms along the inclined surface of the chamfered portion 54 . Therefore, the stepped portion formed at the boundary between the corner portion of the lid portion 21 and the chamfered portion 54 comes into contact with the side portion of the fixing member 61, and movement of the temperature sensor device 10 in the +X direction or the -X direction is restricted. be.
Other configurations of the case 20 of Modification 4 are the same as those of the first embodiment.

(Variation 5 of the case)
FIG. 13 is an external perspective view showing Modification 5 of the case of the present invention.
In Modified Example 5 shown in FIG. 13 , the movement restricting portion provided in the case 20 is formed as fine unevenness 55 formed on the upper surface of the lid portion 21 .
The fine unevenness 55 is formed by, for example, knurling or sandblasting. The minute unevenness 55 increases the contact resistance with the fixing member 61 . Therefore, movement of the temperature sensor device 10 in the +X direction or the −X direction is regulated by the minute unevenness 55 .
Other configurations of the case 20 of Modification 5 are the same as those of the first embodiment.

In addition, in the fifth embodiment, it is preferable to form the minute unevenness 61 b also in the area of the fixing member 61 that contacts the minute unevenness 55 .

(Modified example of water intrusion prevention structure)
FIG. 14 shows a modification of the water intrusion prevention structure provided in the case shown in FIG. 3. FIG. 14(a) is a sectional view corresponding to FIG. is a cross-sectional view corresponding to FIG. 3(b).
As shown in FIGS. 14(a) and 14(b), a pair of protrusions 26 extending from the inner surface of one side portion 22a of the case 20 to the inside of the case are integrally molded with the case 20. there is The pair of protrusions 26 are separated by a length that allows the connection lead 42 to be inserted. The tips of the pair of protrusions 26 do not reach the inner surface of the other side portion 22b, and there is a space between the tips of the pair of protrusions 26 and the inner surface of the other side portion 22b. In addition, there is a space between the projection 26 and the inner surface of the lid 21 and between the projection 26 and the surface 91 to be measured. Furthermore, the pair of protrusions 26 are provided apart from each other, and there is a space between the pair of protrusions 25 .

Also in this structure, the pair of protrusions 26 can prevent the temperature detection element 41 from being pulled out of the housing space 24 of the case 20 . Moreover, the pair of protrusions 26 does not have a structure that closes the accommodation space 24 , but has an open space that opens the accommodation space 24 . As described above, the end opening 24b is formed at the end of the case 20, and the case 20 has an externally open space that opens the housing space 24 to the outside on the connection lead 42 side, thereby suppressing water intrusion. A structure is formed.
As shown in FIGS. 14(a) and 14(b), if a pair of protrusions 26 extending from the inner surface of one side portion 22a of the case 20 to the inside of the case is provided, the case 20 can be The length in the width direction (the length between the side portions 22a-22b) can also be increased.

In the above embodiment, the members for pressing the temperature detection element 41 against the surface 91 to be measured are exemplified by the leaf springs 31 to 33 . However, instead of the leaf springs 31 to 33, a compression spring or a biasing member such as a cushion member can be used.

Although various embodiments and modifications have been described above, the present invention is not limited to these contents. The various embodiments and modifications described above may be combined or modified as appropriate, and other aspects conceivable within the scope of the technical idea of the present invention are also included within the scope of the present invention.

10 temperature sensor device 20 case (enclosure)
24 accommodation space 24a contact opening 24b end opening 25 raised portion 26 projection 27 holding portion 31 to 33 leaf spring (biasing member)
41 temperature detection element 42 connection lead (output line)
51 concave portion (movement restriction portion)
52 projecting portion (movement restricting portion)
53 concave portion (movement restriction portion)
54 Chamfered portion (movement restriction portion)
55 micro unevenness (movement restriction part)
61 fixing member
65 pull-out prevention member 91 surface to be measured

Claims (7)

a temperature detection element that measures the temperature of a measurement target;
a housing that houses the temperature detection element and has an outer surface that is pressed against an object to be measured;
a biasing member provided inside the housing for pressing the temperature detection element against a measurement target;
The housing is provided with an opening for bringing the temperature detection element biased by the biasing member into contact with the measurement object ,
The housing is provided with an external open space in which an output line of the temperature detection element is arranged, and a water intrusion suppression structure for suppressing water from entering the accommodation space inside the external open space. A temperature sensor device provided with . The temperature sensor device according to claim 1,
A temperature sensor device, wherein a movement restricting portion is provided on the outer surface of the housing for restricting the movement of the temperature sensor device by receiving a force that moves the temperature sensor device in a predetermined direction. In the temperature sensor device according to claim 2,
The temperature sensor device, wherein the movement restricting portion is any one of a concave portion, a protruding portion, a chamfered portion, and a fine concave-convex portion provided on the outer surface of the housing . In the temperature sensor device according to claim 2,
The temperature sensor device, wherein at least a portion of the outer surface of the housing, which is in contact with a fixing member for fixing the temperature sensor device to the object to be measured, is made of an insulating material. The temperature sensor device according to claim 1,
The temperature sensor device, wherein the biasing member is a leaf spring. In the temperature sensor device according to claim 4 ,
The temperature sensor device, wherein the biasing member is integrally molded with and held by the housing made of resin. In the temperature sensor device according to any one of claims 1 to 6 ,
The housing is provided with a holding portion that holds the temperature detection element biased by the biasing member in a state of protruding from the opening toward the surface to be measured.

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