Temperature sensor unit, temperature sensor assembly, and method for assembling a temperature sensor

Abstract

The present invention provides a temperature sensor unit that allows for precise positioning of the sensor case relative to the object being measured, while also having a configuration that facilitates installation and manufacturing. [Solution] The temperature sensor 10 is housed in the main body 21 of the temperature sensor unit 2. The protruding portion 23 protrudes from the main body 21. The holding member 30 holds the sensor case 20. The main body 21 has first and second sides that are aligned in a first direction. In the holding member 30, the first portion is in contact with the first side and has a through hole α through which the protruding portion 23 passes. The protruding portion 23 includes a through portion 23a and a tip portion 23b. The through portion 23a protrudes from the first side in a second direction and also passes through the through hole. The tip portion 23b is connected to the through portion 23a on the side opposite to the first side. The tip portion 23b has an opposing surface 23e. The opposing surface 23e faces the first portion and faces the first side with the first portion in between.

Description

Technical Field

[0001] The present invention relates to a temperature sensor unit, an assembly of a temperature sensor, and a method for assembling a temperature sensor.

Background Art

[0002] A temperature sensor unit including a temperature sensor, a sensor case, and a holding member is known (for example, Patent Document 1). The sensor case houses the temperature sensor. The holding member holds the sensor case.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For accurate temperature detection of a measurement object, it is desirable that the sensor case be accurately positioned with respect to the measurement object. In Patent Document 1, a holding member is used for positioning the sensor case. The more complex the shape of the holding member is for accurate positioning of the sensor case, the more likely the manufacturing cost is to increase. Even if the number of parts increases, the attachment becomes complicated and the manufacturing cost increases.

[0005] One aspect of the present invention aims to provide a temperature sensor unit having a configuration that is easy to attach and manufacture while the sensor case is accurately positioned with respect to the measurement object. Another aspect of the present invention aims to provide an assembly of a temperature sensor having a configuration that is easy to attach and manufacture while the sensor case is accurately positioned with respect to the measurement object. Still another aspect of the present invention aims to provide a method for assembling a temperature sensor that can easily and accurately position the sensor case with respect to the measurement object. [Means for solving the problem]

[0006] A temperature sensor unit according to one embodiment comprises a temperature sensor, a sensor case, and a holding member. The sensor case includes a main body and at least one projection. The main body extends in a first direction. The temperature sensor is housed in the main body. The projection protrudes from the main body in a second direction intersecting the first direction. The holding member holds the sensor case. The main body has a first side surface and a second side surface that are aligned in a first direction. The holding member includes a first portion. The first portion is in contact with the first side surface and has a through hole through which the projection passes. At least one projection includes a through portion and a tip portion. The through portion protrudes from the first side surface in a second direction and also passes through the through hole. The tip portion is connected to the through portion on the side opposite to the first side surface. The tip portion has an opposing surface. The opposing surface faces the first portion and faces the first side surface across the first portion.

[0007] In one of the above embodiments, the first portion of the holding member of the temperature sensor unit is in contact with the first side surface of the main body and has a through hole through which the protruding portion of the sensor case passes. The through portion of the protruding portion protrudes from the first side surface in a second direction and also passes through the through hole. The tip of the protruding portion has an opposing surface that faces the first side surface, sandwiching the first portion. As a result, the sensor case is fixed to the holding member by the protruding portion. Therefore, the sensor case is accurately positioned relative to the object to be measured. Furthermore, this configuration is easy to install and manufacture.

[0008] In one of the above embodiments, the sensor case may include a plurality of protrusions. The first part may have a plurality of through holes through which each of the plurality of protrusions passes. In this case, since each of the plurality of protrusions passes through the plurality of through holes, the sensor case is more securely fixed to the retaining member.

[0009] In one of the above embodiments, the maximum width in the first direction of the protruding portion may be greater than the maximum width in the third direction intersecting the first and second directions. In this case, rotation of the sensor case relative to the holding member can be suppressed.

[0010] In one of the above embodiments, the second side may be curved and configured to contact the object whose temperature is to be measured by the temperature sensor. In this case, a contact area between the sensor case and the object to be measured can be ensured.

[0011] In one of the above embodiments, the second surface may be configured to be in contact with the object being measured. The thermal conductivity of the material forming the second surface may be higher than that of the material forming the first surface. In this case, heat from the object being measured is more easily transferred from the second surface, and the temperature of the object can be measured more accurately.

[0012] In one of the above embodiments, the main body further has a third side surface. The third side surface may be aligned with the first direction and extend in the second direction. The retaining member may further include a second portion facing the third side surface. In this case, the second portion of the retaining member engages with the third side surface, and the sensor case is held more stably by the retaining member.

[0013] In one of the above embodiments, the main body may further include a fourth side facing the third side. The retaining member may further include a third portion facing the fourth side. In this case, the sensor case is sandwiched between the second and third portions, and the sensor case is more stably held by the retaining member.

[0014] In one of the above embodiments, the retaining member may have an opening that exposes the third side surface from the second portion when viewed from a direction perpendicular to the third side surface. In this case, the position of the sensor case can be confirmed from the opening, and the assembly accuracy of the sensor case can be confirmed.

[0015] In one of the above embodiments, the temperature sensor may include a temperature-sensing element housed inside the main body. The temperature-sensing element may include a portion that does not overlap with the through-hole when viewed from a direction perpendicular to the first side surface. In this case, it is less susceptible to the influence of heat conduction from the through-hole, and a more accurate temperature can be measured by the temperature-sensing element.

[0016] Another embodiment of the temperature sensor assembly comprises the temperature sensor unit and an object whose temperature is to be measured by the temperature sensor. In this case, the temperature sensor unit is reliably positioned relative to the object to be measured, and the temperature of the object can be accurately measured.

[0017] A method for assembling a temperature sensor according to yet another embodiment comprises a sensor case including a main body and at least one protrusion, and a holding member including a first portion having a through hole and holding the sensor case, wherein the method involves inserting at least one protrusion into the through hole and forming the through portion and the tip by crimping. The main body extends in a first direction and has a first side and a second side that are aligned in the first direction, and houses the temperature sensor. At least one protrusion protrudes from the main body. The crimping is performed on the tip of the at least one protrusion inserted into the through hole. The through portion penetrates the first portion in the through hole. The tip is connected to the through portion and has an opposing surface. The opposing surface faces the first portion and has an opposing surface that faces the first side opposite to the first side, with the first portion in between.

[0018] In one of the other embodiments described above, the sensor case is fixed to the holding member by its tip. Therefore, the sensor case is accurately positioned relative to the object to be measured. Furthermore, with this configuration, the sensor case can be easily attached to the object to be measured. [Effects of the Invention]

[0019] According to one aspect of the present invention, there is provided a temperature sensor unit having a configuration that enables easier attachment and manufacturing while the sensor case is accurately positioned with respect to the measurement object. Another aspect of the present invention provides an assembly of a temperature sensor having a configuration that enables easier attachment and manufacturing while the sensor case is accurately positioned with respect to the measurement object. Still another aspect of the present invention provides a method of assembling a temperature sensor that can be easily attached while the sensor case is accurately positioned with respect to the measurement object.

Brief Description of the Drawings

[0020] [Figure 1] FIG. 1 is a side view showing an assembly of a temperature sensor according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing a temperature sensor unit. [Figure 3] FIG. 3 is a perspective view showing a temperature sensor unit. [Figure 4] FIG. 4 is a plan view of a temperature sensor and a sensor case. [Figure 5] FIG. 5 is a side view of a temperature sensor and a sensor case. [Figure 6] FIG. 6 is a view showing the position of a temperature sensor with respect to a sensor case. [Figure 7] FIG. 7 is a perspective view showing a temperature sensor unit before caulking. [Figure 8] FIG. 8 is a perspective view showing a sensor case and a temperature sensor before caulking. [Figure 9] FIG. 9 is a perspective view showing a temperature sensor unit according to a modification of the present embodiment. [Figure 10] FIG. 10 is a perspective view showing a temperature sensor unit before caulking in a modification of the present embodiment. [Figure 11] FIG. 11 is a perspective view showing a temperature sensor unit before caulking in a modification of the present embodiment. [Figure 12] FIG. 12 is a perspective view showing a temperature sensor unit according to a modification of the present embodiment. [Figure 13] Figure 13 is a perspective view showing a modified temperature sensor unit according to this embodiment. [Figure 14] Figure 14 is a perspective view showing a modified example of this embodiment, including a sensor case and a retaining member. [Figure 15] Figure 15 shows the position of the temperature sensor relative to the sensor case in a modified example of this embodiment. [Figure 16] Figure 16 is a perspective view showing a modified temperature sensor unit according to this embodiment. [Figure 17] Figure 17 is a perspective view showing a modified example of this embodiment, specifically the temperature sensor unit before crimping. [Figure 18] Figure 18 is a perspective view showing a modified temperature sensor unit according to this embodiment. [Figure 19] Figure 19 is a perspective view showing a modified example of this embodiment, specifically the temperature sensor unit before crimping. [Modes for carrying out the invention]

[0021] Embodiments of the present invention will be described in detail below with reference to the attached drawings. In this description, the same reference numerals will be used for elements that are the same or have the same function, and redundant explanations will be omitted.

[0022] Referring to Figures 1 to 8, the configuration of the temperature sensor assembly 1 according to this embodiment will be described. Hereinafter, the temperature sensor assembly will also be simply referred to as the assembly. Figure 1 is a diagram showing a temperature sensor assembly according to one embodiment. The X, Y, and Z axes extend in directions that intersect each other. In the example shown in this embodiment, the X-axis direction, Y-axis direction, and Z-axis direction are orthogonal to each other.

[0023] As shown in Figure 1, the assembly 1 includes a temperature sensor unit 2 and an object to be measured 3. For example, the assembly 1 is configured so that the temperature sensor unit 2 and the object to be measured 3 are in contact. Figures 2 and 3 are perspective views of the temperature sensor unit 2.

[0024] In the example shown in this embodiment, the object to be measured 3 is cylindrical in shape. The object to be measured 3 includes an outer circumferential surface 3a. The object to be measured 3 may have a shape other than this. The object to be measured 3 is, for example, a conductive member that functions as a component of another electrical circuit (not shown).

[0025] As shown in Figure 1, the temperature sensor unit 2 is attached to the object to be measured 3 and measures the temperature of the object to be measured 3. The temperature sensor unit 2 detects the heat transferred from the object to be measured 3. The temperature sensor unit 2 comprises a temperature sensor 10, a sensor case 20 in which the temperature sensor 10 is housed, and a holding member 30 that holds the sensor case 20. The holding member 30 corresponds to a positioning member that positions the sensor case 20 relative to the object to be measured 3.

[0026] The sensor case 20 includes a main body 21 and a protruding portion 23. Figures 4 to 6 show the temperature sensor and the sensor case. The sensor case 20 extends in the Z-axis direction. The temperature sensor 10 measures the temperature of the object to be measured 3. The temperature sensor 10 is housed in the main body 21 of the sensor case 20. The temperature sensor 10 detects heat transmitted from the outside. As shown in Figure 6, the temperature sensor 10 includes a sensing unit 11, conductors 12 and 13 connected to two electrodes (not shown) of the sensing unit 11, and lead wires 14 and 15 electrically connected to the conductors 12 and 13, respectively. The sensing unit 11 corresponds to, for example, a temperature sensing element. The temperature sensing element has, for example, the characteristic that its resistance decreases as the temperature increases. The sensing unit 11 is housed inside the sensor case 20. For example, the temperature sensing element includes an NTC (Negative Temperature Coefficient) thermistor element.

[0027] The main body 21 of the sensor case 20 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes a rectangular parallelepiped with chamfered corners and edges, and a rectangular parallelepiped with rounded corners and edges. The main body 21 extends in the Z-axis direction. The main body 21 is a bottomed cylindrical shape with a bottom 21a at one end in the longitudinal direction and an opening 21b at the other end. The main body 21 is filled with resin 25 with the temperature sensor 10 inserted in the Z-axis direction through the opening 21b. The detection part 11 of the temperature sensor 10 is positioned near the bottom 21a of the main body 21 by the hardened resin 25. Lead wires 14 and 15 electrically connected to the detection part 11 extend from the opening 21b to the outside of the main body 21. The sensor case 20 is made of a thermoplastic resin such as PP resin (polypropylene resin) and PPS resin (polyphenylene sulfide resin). The resin 25 is made of a thermosetting resin, such as epoxy resin.

[0028] The main body 21 of the sensor case 20 has an outer surface. The outer surface of the main body 21 includes four sides 26a, 26b, 26c, and 26d connected to the bottom 21a. Sides 26a and 26b are located opposite each other in the Y-axis direction. Sides 26c and 26d are located opposite each other in the X-axis direction. Sides 26a and 26b are arranged along the X-axis and Z-axis directions, respectively. Sides 26a and 26b are perpendicular to the Y-axis direction. Sides 26c and 26d intersect with sides 26a and 26b. Sides 26c and 26d are arranged along the Y-axis and Z-axis directions, respectively. Sides 26c and 26d extend in the Y-axis direction. Sides 26c and 26d are perpendicular to the X-axis direction. Side 26d is configured to be in contact with the object to be measured 3. For example, the Z-axis direction corresponds to the first direction, and the Y-axis direction corresponds to the second direction.

[0029] Sides 26a, 26c, and 26d are flat. Side 26b is curved. Side 26d is curved in an arch shape when viewed from the Z-axis direction. In other words, on side 26d, the curved surface is continuous in the Z-axis direction. Sides 26c and 26d are both rectangular in shape when viewed from above. The sensor case 20 further includes corners 26e and 26f. Corner 26e connects side 26a and side 26c. Corner 26f connects side 26a and side 26d. For example, side 26a corresponds to the first side, side 26b corresponds to the third side, side 26c corresponds to the second side, and side 26d corresponds to the fourth side.

[0030] In the example shown in this embodiment, the sensor case 20 includes a plurality of protrusions 23. For example, the sensor case 20 includes two protrusions 23. Each protrusion 23 is connected to the side surface 26a of the main body 21. Each protrusion 23 projects from the side surface 26a in the Y-axis direction. In other words, each protrusion 23 extends in a direction perpendicular to the side surface 26a.

[0031] Multiple protrusions 23 are arranged along the longitudinal direction of the sensor case 20. Each protrusion 23 includes a through portion 23a and a tip portion 23b. In the example shown in this embodiment, the through portion 23a has a cylindrical shape. Viewed from the Y-axis direction, the through portion 23a has a circular shape, and the tip portion 23b has a concentric circular shape with respect to the through portion 23a. The through portion 23a is connected to the side surface 26a, extends from the side surface 26a, and penetrates the holding member 30. The tip portion 23b is connected to the through portion 23a on the side opposite to the main body portion 21 and forms the tip of the protrusion 23. The detection portion 11 includes a portion that does not overlap with the through portion 23a when viewed from the Y-axis direction.

[0032] The holding member 30 positions the sensor case 20 relative to the object to be measured 3. The holding member 30 has a bent plate shape. The holding member 30 is made of metal. The holding member 30 grips the sensor case 20 and the object to be measured 3 when the two are in contact. The holding member 30 includes a first holding portion 31 that contacts the sensor case 20, a second holding portion 32 and a third holding portion 34 that contact the object to be measured 3, and a connecting portion 33 that connects the first holding portion 31 and the second holding portion 32. The first holding portion 31 engages with the sensor case 20, and the second holding portion 32 and the third holding portion 34 engage with the object to be measured 3. The metal material of the holding member 30 can be spring-grade phosphor bronze or spring-grade stainless steel.

[0033] The first retaining portion 31 includes a first wall portion 31a and a second wall portion 31b. The first wall portion 31a faces the side surface 26a of the sensor case 20. The first wall portion 31a is in contact with the side surface 26a of the sensor case 20. The second wall portion 31b faces the side surface 26c. The first wall portion 31a and the second wall portion 31b have a plate shape.

[0034] The first wall portion 31a is connected to the second wall portion 31b at one end and to the connecting portion 33 at the other end. The first wall portion 31a and the second wall portion 31b form a corner portion C1 at the point where they are connected, and the corner portion 26f of the sensor case 20 is located at this corner portion C1. In the example shown in this embodiment, the first wall portion 31a corresponds to the first part, and the second wall portion 31b corresponds to the second part. In this specification, "facing" means that two parts are opposite each other without any other members shown in this specification in between. For example, "p faces q" means that "p" and "q" are facing each other without any other members shown in this specification in between. In this specification, "opposing" means that two parts are facing each other regardless of whether or not there are other members in between.

[0035] The first wall portion 31a extends along the side surface 26a. The first wall portion 31a is arranged along the X-axis and Z-axis directions. The first wall portion 31a and the second wall portion 31b extend in directions that intersect each other. For example, the first wall portion 31a and the second wall portion 31b are perpendicular to each other. The first wall portion 31a has a through hole α. The through portion 23a penetrates the through hole α. For example, the first wall portion 31a has two through holes α through which the through portions 23a of the two protrusions 23 each penetrate. Viewed from the Y-axis direction, the through hole α is circular in shape.

[0036] In the direction perpendicular to the direction in which the protrusion 23 protrudes, the minimum width of the tip portion 23b is greater than the minimum width of the through hole α. In the example shown in this embodiment, in the direction perpendicular to the direction in which the protrusion 23 protrudes, the minimum width of the tip portion 23b is greater than the maximum width of the through hole α. In the example shown in this embodiment, the minimum width of the tip portion 23b corresponds to the diameter D1 of the tip portion 23b, and the minimum and maximum widths of the through hole α correspond to the diameter D2 of the through hole α. In the X-axis and Z-axis directions, the diameter of the through portion 23a is smaller than the diameter D2 of the through hole α, and the diameter D1 of the tip portion 23b is larger than the diameter D2 of the through hole α.

[0037] The tip portion 23b has an opposing surface 23e. The opposing surface 23e faces the first wall portion 31a and also faces the side surface 26a with the first wall portion 31a in between. The sensor case 20 is configured to contact the object to be measured 3 at the opposing surface 23e. The first wall portion 31a is in contact with the side surface 26a and the opposing surface 23e. The first wall portion 31a is sandwiched between the side surface 26a and the opposing surface 23e. The opposing surface 23e is, for example, a plane.

[0038] The second wall portion 31b extends along the side surface 26d. The second wall portion 31b is arranged along the Y-axis and Z-axis directions. The second wall portion 31b is in contact with the side surface 26d. The second wall portion 31b extends from the first wall portion 31a along the Y-axis direction. The second wall portion 31b is connected to the first wall portion 31a at one end and to the third retaining portion 34 at the other end.

[0039] The connecting portion 33 extends in the Y-axis and X-axis directions away from the first wall portion 31a, the second wall portion 31b, the third holding portion 34, and the sensor case 20. In the example shown in this embodiment, the connecting portion 33 has a plate shape. The connecting portion 33 and the second wall portion 31b are separated and face each other. The first wall portion 31a and the connecting portion 33 form a corner portion C3 at the point where they are connected to each other. In the Y-axis direction, the connecting portion 33 extends from the corner portion C3 away from the side surface 26a on the opposite side from the tip portion 23b. The connecting portion 33 is connected to the first wall portion 31a at one end and to the second holding portion 32 at the other end. When viewed from the Z-axis direction, a cavity is formed between the connecting portion 33, the sensor case 20, and the object to be measured 3.

[0040] The second holding portion 32 faces the object to be measured 3. The second holding portion 32 and the connecting portion 33 are connected to each other. The second holding portion 32 includes a third wall portion 32a. The third wall portion 32a has, for example, a curved plate shape. The third wall portion 32a is connected to the connecting portion 33 at one end and forms the tip portion 32b of the holding member 30 at the other end. The third wall portion 32a and the connecting portion 33 form a corner portion C4 at the portion where they are connected to each other. The third wall portion 32a includes the tip portion 32b. The tip portion 32b is curved away from the object to be measured 3 in the X-axis and Y-axis directions.

[0041] The third wall portion 32a faces, for example, the first wall portion 31a, the connecting portion 33, and the third holding portion 34 in the Y-axis direction. For example, the object to be measured 3 and the sensor case 20 are sandwiched between the third wall portion 32a and the first wall portion 31a. The object to be measured 3 is sandwiched between the third wall portion 32a and the third holding portion 34. The third wall portion 32a is in elastic contact with the outer circumferential surface 3a of the object to be measured 3. For example, the third wall portion 32a faces the outer circumferential surface 3a of the object to be measured 3 and extends along the outer circumferential surface 3a of the object to be measured 3.

[0042] The third holding portion 34 faces the object to be measured 3. The third holding portion 34 and the first holding portion 31 are connected to each other. The third holding portion 34 includes a fourth wall portion 34a. The fourth wall portion 34a is, for example, plate-shaped. The fourth wall portion 34a extends away from the first wall portion 31a, the second wall portion 31b, and the sensor case 20 in the Y-axis and X-axis directions. The fourth wall portion 34a is positioned along the Z-axis direction. The fourth wall portion 34a and the first wall portion 31a are separated. The fourth wall portion 34a and the second wall portion 31b form a corner portion C2 where they are connected to each other. In the Y-axis direction, the fourth wall portion 34a extends away from the side surface 26a and away from the side surface 26b. The fourth wall portion 34a elastically contacts the outer circumferential surface 3a of the object to be measured 3. The fourth wall portion 34a is connected to the second wall portion 31b at one end and forms the tip portion 34d of the holding member 30 at the other end. The fourth wall portion 34a includes the tip portion 34d. The tip portion 34d is curved in the X-axis and Y-axis directions so as to move away from the object to be measured 3.

[0043] As shown in Figures 2 and 3, in the example shown in this embodiment, the retaining member 30 has an opening β1 and an opening β2. Opening β1 is defined by a first wall portion 31a, a connecting portion 33, and a third wall portion 32a. Opening β2 is defined by the third wall portion 32a. Openings β1 and β2 are rectangular in shape. Openings β1 and β2 extend along the extending direction of the retaining member 30 in the XY plane. In openings β1 and β2, the width in the extending direction of the retaining member 30 in the XY plane is greater than the width in the Z axis direction.

[0044] The opening β1 divides corners C3 and C4. The connecting portion 33 is divided into two by the opening β1. Viewed from the X-axis direction, the side surface 26c of the sensor case 20 is exposed from the connecting portion 33 of the holding member 30 by the opening β1. In other words, the side surface 26c of the sensor case 20 can be seen from the opening β1 when viewed from the X-axis direction. Viewed from the Y-axis direction, the side surface 26b of the sensor case 20 is exposed from the second wall portion 31b of the holding member 30 by the opening β2. In other words, the side surface 26b of the sensor case 20 can be seen from the opening β2 when viewed from the Y-axis direction.

[0045] The retaining member 30 is integrally constructed to surround the sensor case 20 when viewed from the Z-axis direction, and is positioned in the order of fourth wall portion 34a, second wall portion 31b, first wall portion 31a, connecting portion 33, and third wall portion 32a. The fourth wall portion 34a, second wall portion 31b, first wall portion 31a, connecting portion 33, and third wall portion 32a are continuous in this order. In the example shown in this embodiment, the retaining member 30 is formed in an annular shape so as to be divided between the fourth wall portion 34a and the third wall portion 32a when viewed from the Z-axis direction.

[0046] Next, the method for assembling the temperature sensor will be described. The tip portion 23b of the protrusion 23 is formed by crimping. Figure 7 is a perspective view showing the temperature sensor unit before crimping. Figure 8 is a perspective view showing the sensor case and temperature sensor before crimping. Before crimping, the sensor case 20 includes a plurality of protrusions 43. The plurality of protrusions 43 are arranged in the longitudinal direction of the sensor case 20. Each protrusion 43 is connected to the side surface 26a of the main body 21. Each protrusion 43 protrudes from the side surface 26a in the Y-axis direction. In other words, each protrusion 43 extends in a direction perpendicular to the side surface 26a. Each protrusion 43 has a cylindrical shape. When viewed from the Y-axis direction, each protrusion 43 has the same shape as the through portion 23a of the protrusion 23. The protrusion 43 is connected to the side surface 26a at one end and forms an end surface 43a at the other end. The end face 43a has a circular shape when viewed from the Y-axis direction.

[0047] In the crimping process, each projection 43 is inserted into the through hole α of the retaining member 30. Multiple projections 43 are each inserted into their corresponding through holes α. Then, while each projection 43 is inserted into the through hole α of the retaining member 30, the end face 43a is pressed, crushing the tip of the projection 43 and forming the tip portion 23b of the projection 23. For example, the projection 23 is pressed against the retaining member 30 by the crimping process. In other words, the crimping process on the tip of the projection 43 inserted into the through hole α forms the through portion 23a and the tip portion 23b having an opposing surface 23e.

[0048] Next, the configuration of a modified temperature sensor unit will be described using Figures 9 to 11. This modified configuration differs from the embodiment described above in terms of the configuration of the temperature sensor unit. The differences between the embodiment described above and this modified configuration will be mainly described below. Figure 9 is a perspective view of the modified temperature sensor unit of this embodiment. Figure 9 shows the temperature sensor unit 2A before crimping. Figures 10 and 11 are perspective views of the sensor case and temperature sensor of the modified configuration of this embodiment. Figures 10 and 11 show the sensor case 20A before crimping.

[0049] The temperature sensor unit 2A includes a sensor case 20A, a retaining member 30A, and a temperature sensor 10. The temperature sensor unit 2A differs from the temperature sensor unit 2 only in the configuration of the sensor case 20A and the retaining member 30A. The sensor case 20A includes a main body 50 and a protruding portion 53. In Figures 9 to 11, the protruding portion 53 is shown in its state before crimping. Similar to the temperature sensor unit 2, the protruding portion 53 has a tip and a through portion formed by crimping. During crimping, the end face 53a of the protruding portion 53 is pressed.

[0050] The retaining member 30A includes a first retaining portion 51, a second retaining portion 32, a third retaining portion 34, and a connecting portion 33. The first retaining portion 51 includes a first wall portion 52 and a second wall portion 31b. The first wall portion 52 has a through hole α. The through hole α is formed along the circumference of the protruding portion 53 in the XZ plane. The retaining member 30A differs from the retaining member 30 only in the shape of the through hole α. Viewed from the Y-axis direction, the end face 53a and the through hole α have similar shapes. The outer surface of the main body portion 21 includes four sides 56a, 56c, 56d, and 57b connected to the bottom portion 50a.

[0051] Sides 56a and 57b are located on opposite sides in the Y-axis direction. Sides 56c and 56d are located on opposite sides in the X-axis direction. Sides 56a and 57b are arranged along the X-axis and Z-axis directions, respectively. Sides 56a and 57b are perpendicular to the Y-axis direction. Sides 56c and 56d intersect with sides 56a and 57b. Side 57bd is configured to be in contact with the object to be measured 3. Sides 56c and 56d are arranged along the Y-axis and Z-axis directions, respectively. Sides 56c and 56d extend in the Y-axis direction. Sides 56c and 56d are perpendicular to the X-axis direction. For example, the Z-axis direction corresponds to the first direction, and the Y-axis direction corresponds to the second direction.

[0052] Sides 56a, 56c, 56d, and 57b are flat. Sides 56c and 56d are both rectangular in shape when viewed from above. The sensor case 20A further includes corners 26e and 26f. Corner 26e connects side 56a and side 56c. Corner 26f connects side 56a and side 56d. For example, side 56a corresponds to the first side, side 57b corresponds to the second side, side 56c corresponds to the fourth side, and side 56d corresponds to the third side.

[0053] The main body 50 includes a cover 56 and a substrate 57. The substrate 57 has a rectangular parallelepiped shape. The cover 56 covers the substrate 57. The main body 50 forms a space created by the cover 56 and the substrate 57, and the detection unit 11 of the temperature sensor 10 is arranged in this space. For example, the detection unit 11 is arranged to be in contact with the substrate 57. The thermal conductivity of the material forming the substrate 57 is higher than that of the material forming the cover 56.

[0054] The outer surface of the cover 56 includes four sides 56a, 56c, and 56d connected to the bottom 50a. The substrate 57 includes a side 57b. The side 57b is configured to be in contact with the object to be measured 3. The thermal conductivity of the material forming the side 57b is higher than that of the material forming the side 56a.

[0055] The cover 56 has a plurality of openings 58 through which the substrate 57 is exposed. Each opening 58 extends from the side surface 57a in the Y-axis direction. The plurality of openings 58 are formed on side surfaces 56a, 56c, and 56d, respectively. An opening 58 is located in the center of side surface 56a in the X-axis direction. An opening 58 is located in the center of side surface 56c in the Z-axis direction. An opening 58 is located in the center of side surface 56d in the Z-axis direction.

[0056] Next, the configuration of a modified example of the temperature sensor unit will be described using Figures 12 and 13. This modified example differs from the embodiment described above in terms of the configuration of the holding member. The differences between the embodiment described above and this modified example will be mainly described below. Figures 12 and 13 are perspective views of the modified temperature sensor unit of this embodiment. Figures 12 and 13 show the temperature sensor unit before crimping. Similar to the temperature sensor unit 2, the protruding portion 43 has a tip portion and a through portion formed by crimping. During crimping, the end face of the protruding portion 43 is pressed.

[0057] The temperature sensor unit 2B includes a temperature sensor 10, a sensor case 20B, and a retaining member 30B. The sensor case 20B differs from the sensor case 20 in that it has a side 26g instead of a side 26b. The side 26g is flat. The side 26g is configured to contact the object to be measured 3. The retaining member 30B includes a first retaining portion 61 that contacts the sensor case 20B, and a second retaining portion 62 and a third retaining portion 64 that contact the object to be measured 3. The first retaining portion 61 engages with the sensor case 20B, and the second retaining portion 62 and the third retaining portion 64 engage with the object to be measured 3. The metal material used for the retaining member 30 is spring phosphor bronze or spring stainless steel, etc.

[0058] The first retaining portion 61 includes a first wall portion 61a, a second wall portion 61b, and a third wall portion 61c. The first wall portion 61a faces the side surface 26a of the sensor case 20B. The second wall portion 61b faces the side surface 26d. The third wall portion 61c faces the side surface 26c. The first wall portion 61a, the second wall portion 61b, and the third wall portion 61c have a plate shape.

[0059] The first wall portion 61a is connected to the second wall portion 61b at one end and to the third wall portion 61c at the other end. The first wall portion 61a and the second wall portion 61b form a corner portion C1 at the point where they are connected, and the corner portion 26f of the sensor case 20 is located at this corner portion C1. The first wall portion 61a and the third wall portion 61c form a corner portion C3 at the point where they are connected, and the corner portion 26e of the sensor case 20B is located at this corner portion C3. In this modified example, the first wall portion 61a corresponds to the first part, the second wall portion 61b corresponds to the second part, and the third wall portion 61c corresponds to the third part.

[0060] The first wall portion 61a extends along the side surface 26a. The first wall portion 61a is arranged along the X-axis and Z-axis directions. The first wall portion 61a is in contact with the side surface 26a. The first wall portion 61a and the second wall portion 61b extend in directions that intersect each other. For example, the first wall portion 61a and the second wall portion 61b are perpendicular to each other. The first wall portion 61a and the third wall portion 61c extend in directions that intersect each other. For example, the first wall portion 61a and the third wall portion 61c are perpendicular to each other. The first wall portion 61a has a through hole α.

[0061] The second wall portion 61b extends along the side surface 26d. The second wall portion 61b is arranged along the Y-axis and Z-axis directions. The second wall portion 61b is in contact with the side surface 26d. The second wall portion 61b extends from the first wall portion 61a along the Y-axis direction. The second wall portion 61b is connected to the first wall portion 61a at one end and to the third retaining portion 64 at the other end. The second wall portion 61b and the third retaining portion 64 form a corner portion C2 at the point where they are connected to each other.

[0062] The third wall portion 61c extends along the side surface 26c. The third wall portion 61c is positioned along the Y-axis and Z-axis directions. The third wall portion 61c is in contact with the side surface 26c. The third wall portion 61c extends from the first wall portion 61a along the Y-axis direction. The second wall portion 61b is connected to the first wall portion 61a at one end and to the third retaining portion 64 at the other end. The second wall portion 61b and the third retaining portion 64 form a corner portion C3 at the point where they are connected to each other.

[0063] The second holding portion 62 faces the object to be measured 3. The second holding portion 62 and the third wall portion 61c are connected to each other. The second holding portion 62 includes a fourth wall portion 62a. The fourth wall portion 62a has, for example, a curved plate shape. The fourth wall portion 62a is connected to the third wall portion 61c at one end and forms the tip portion 62b of the holding member 30B at the other end. The fourth wall portion 62a and the third wall portion 61c form a corner portion C5 at the portion where they are connected to each other. The fourth wall portion 62a includes a tip portion 62b. The tip portion 62b is curved away from the object to be measured 3 in the X-axis and Y-axis directions.

[0064] The third holding portion 64 faces the object to be measured 3. The third holding portion 64 and the second wall portion 61b are connected to each other. The third holding portion 64 includes a fifth wall portion 64a. The fifth wall portion 64a has, for example, a curved plate shape. The fifth wall portion 64a is connected to the second wall portion 61b at one end and forms the tip portion 64d of the holding member 30B at the other end. The fifth wall portion 64a and the second wall portion 61b form a corner portion C2 at the portion where they are connected to each other. The fifth wall portion 64a includes a tip portion 64d. The tip portion 64d is curved away from the object to be measured 3 in the X-axis and Y-axis directions.

[0065] The fourth wall portion 62a and the fifth wall portion 64a face each other in the X-axis direction. The object to be measured 3 is sandwiched between the fourth wall portion 62a and the fifth wall portion 64a. The fourth wall portion 62a is in elastic contact with the outer circumferential surface 3a of the object to be measured 3. For example, the fourth wall portion 62a faces the outer circumferential surface 3a of the object to be measured 3 and extends along the outer circumferential surface 3a of the object to be measured 3. The fifth wall portion 64a is in elastic contact with the outer circumferential surface 3a of the object to be measured 3. For example, the fifth wall portion 64a faces the outer circumferential surface 3a of the object to be measured 3 and extends along the outer circumferential surface 3a of the object to be measured 3.

[0066] As shown in Figures 12 and 13, in this modified example, the retaining member 30B has openings γ1 and γ2. Opening γ1 is defined by a third wall portion 61c and a fourth wall portion 62a. Opening γ2 is defined by a second wall portion 61b and a fifth wall portion 64a. Openings γ1 and γ2 are rectangular in shape. Openings γ1 and γ2 extend along the extending direction of the retaining member 30B in the XY plane. In openings γ1 and γ2, the width of the retaining member 30 in the extending direction in the XY plane is greater than the width in the Z axis direction.

[0067] Opening γ1 divides the corner C5. Viewed from the X-axis direction, the side surface 26c of the sensor case 20B is exposed from the third wall 61c of the retaining member 30B by opening γ1. In other words, the side surface 26c of the sensor case 20B can be seen from opening γ1 when viewed from the X-axis direction. Opening γ2 divides the corner C2. Viewed from the X-axis direction, the side surface 26d of the sensor case 20B is exposed from the second wall 61d of the retaining member 30B by opening γ2. In other words, the side surface 26d of the sensor case 20B can be seen from opening γ2 when viewed from the X-axis direction.

[0068] The retaining member 30B is integrally constructed to surround the sensor case 20B when viewed from the Z-axis direction, and is positioned in the order of fourth wall portion 62a, third wall portion 61c, first wall portion 61a, second wall portion 61b, and fifth wall portion 64a. The fourth wall portion 62a, third wall portion 61c, first wall portion 61a, second wall portion 61b, and fifth wall portion 64a are continuous in this order. In this modified example, the retaining member 30B is formed in an annular shape so as to be divided between the fourth wall portion 62a and the fifth wall portion 64a when viewed from the Z-axis direction. The retaining member 30B is formed symmetrically with respect to the Z-axis direction.

[0069] Next, the configuration of a modified example of the temperature sensor unit 2C will be described using Figures 14 and 15. This modified example differs from the embodiment described above in terms of the configuration of the retaining member and the sensor case. The differences between the embodiment described above and this modified example will be mainly described below. Figure 14 shows the sensor case and retaining member before crimping. Figure 15 shows the position of the temperature sensor relative to the sensor case before crimping. Similar to the temperature sensor unit 2, the protruding portion 43 of the temperature sensor unit 2C is formed with a tip portion and a through portion by crimping. During crimping, the end face 73a of the protruding portion 73 is pressed.

[0070] In this modified example, the sensor case 20C includes one protrusion 73. The sensor case 20C differs from the sensor case 20 only in the presence of the protrusion 73. The protrusion 73 differs from the protrusion 43 only in its arrangement.

[0071] The protrusion 73 has the same shape as one of the protrusions 43. In the sensor case 20C, the protrusion 73 is located in the center of the side surface 76a when viewed from the Y-axis direction. The detection unit 11 includes a portion of the sensor case 20C that does not overlap with the protrusion 73 when viewed from the Y-axis direction. In the crimped sensor case 20C, the tip of the protrusion does not overlap with the detection unit 11 when viewed from the Y-axis direction.

[0072] The retaining member 30C differs from the retaining member 30 only in the arrangement of the through-hole α. The retaining member 30C includes a first wall portion 61g instead of the first wall portion 31a. The first wall portion 61g of the retaining member 30C differs from the first wall portion 31a in that it has only one through-hole α. One projection 73 penetrates through one through-hole α. Viewed from the Y-axis direction, the end face 73a and the through-hole α have similar shapes.

[0073] Next, the configuration of a modified example of the temperature sensor unit 2D will be described using Figures 16 and 17. This modified example differs from the embodiment described above in terms of the configuration of the retaining member and the sensor case. The differences between the embodiment described above and this modified example will be mainly described below. Figure 16 shows the sensor case and retaining member before crimping. Figure 17 shows the sensor case before crimping. Similar to the temperature sensor unit 2, the protruding portion 83 of the temperature sensor unit 2D is formed with a tip portion and a through portion by crimping. During crimping, the end face 83a of the protruding portion 83 is pressed.

[0074] In this modified example, the sensor case 20D includes one protrusion 83. The sensor case 20D differs from the sensor case 20 only in the protrusion 83. The protrusion 83 differs from the protrusion 43 only in its shape and arrangement. The protrusion 83 includes an end face 83a. In this modified example, the protrusion 83 has an elliptical shape when viewed from the Y-axis direction. In the sensor case 20D, the protrusion 83 is located in the center of the side surface 86a when viewed from the Y-axis direction. In the protrusion 83, the maximum width in the Z-axis direction is greater than the maximum width in the X-axis direction.

[0075] The retaining member 30D differs from the retaining member 30 only in the shape and arrangement of the through-hole α. The retaining member 30D includes a first wall portion 61h instead of a first wall portion 31a. The first wall portion 61h of the retaining member 30D differs from the first wall portion 31a in that it has only one through-hole α. Viewed from the Y-axis direction, the through-hole α of the retaining member 30D is elliptical in shape. One projection 83 penetrates through one through-hole α. Viewed from the Y-axis direction, the end face 83a and the through-hole α have similar shapes.

[0076] Next, the configuration of a modified example of the temperature sensor unit 2E will be described using Figures 18 and 19. This modified example differs from the embodiment described above in terms of the configuration of the retaining member and the sensor case. The following will mainly describe the differences between this modified example and the modified examples shown in Figures 16 and 17 described above. Figure 18 shows the sensor case and retaining member before crimping. Figure 19 shows the sensor case before crimping. Similar to the temperature sensor unit 2, the protruding portion 93 of the temperature sensor unit 2E has a tip portion and a through portion formed by crimping. During crimping, the end face 93a of the protruding portion 93 is pressed.

[0077] In this modified example, the sensor case 20E includes one protrusion 93. The sensor case 20E differs from the sensor case 20D only in the protrusion 93. The protrusion 93 differs from the protrusion 83 only in its shape. The protrusion 93 includes an end face 93a. In the protrusion 93, the maximum width in the Z-axis direction is greater than the maximum width in the X-axis direction. In this modified example, when viewed from the Y-axis direction, the end face 93a has an elliptical shape with a pair of protrusions 93b. The pair of protrusions 93b are arranged to face each other in the X-axis direction. Each of the pair of protrusions 93b is located in the center of the projection 93 in the Z-axis direction. The pair of protrusions 93b protrude from the projection 93 in the X-axis direction. In the sensor case 20E, the projection 93 is located in the center of the side surface 96a when viewed from the Y-axis direction.

[0078] The retaining member 30E differs from the retaining member 30D only in the shape and arrangement of the through-hole α. The retaining member 30E includes a first wall portion 61k instead of a first wall portion 31h. The first wall portion 61k of the retaining member 30E has only one through-hole α. Viewed from the Y-axis direction, the through-hole α of the retaining member 30E is elliptical in shape. One projection 93 penetrates through one through-hole α. Viewed from the Y-axis direction, the end face 93a and the through-hole α have similar shapes.

[0079] As described above, in the temperature sensor unit 2, the first wall portion 31a of the holding member 30 is in contact with the side surface 26a of the main body portion 21 and has a through hole α through which the protruding portion 23 of the sensor case 20 passes. The through portion 23a of the protruding portion 23 protrudes from the side surface 26a in the Y-axis direction and passes through the through hole α. The tip portion 23b of the protruding portion 23 has an opposing surface 23e that faces the side surface 26a, with the first wall portion 31a in between. Therefore, the sensor case 20 is fixed to the holding member 30 by the protruding portion 23. Thus, the sensor case 20 is accurately positioned with respect to the object to be measured 3. Furthermore, this configuration makes installation and manufacturing easy. Temperature sensor units 2A, 2B, 2C, 2D, and 2E have a similar configuration and provide similar effects.

[0080] The sensor case 20 may include a plurality of protrusions 23. The first wall portion 31a may have a plurality of through holes α through which each of the plurality of protrusions 23 passes. In this case, since each of the plurality of protrusions 23 passes through the plurality of through holes α, the sensor case 20 is securely fixed by the holding member 30. The temperature sensor unit 2B has a similar configuration and provides similar effects.

[0081] In the protruding portion 83, the maximum width in the X-axis direction may be greater than the maximum width in the Z-axis direction. In this case, rotation of the sensor case 20D relative to the holding member 30D can be suppressed. The sensor case 20E has a similar configuration and provides similar effects.

[0082] In the sensor case 20, the sides may be curved and configured to contact the object to be measured. In this case, a contact area between the sensor case and the object to be measured can be ensured.

[0083] The sensor case 20 may be configured to be in contact with the object to be measured 3 at its side surface 26d. In this case, the sensor case 20 is more securely fixed to the object to be measured 3.

[0084] In the sensor case 20A, the side surface 57b may be configured to be in contact with the object to be measured 3. The thermal conductivity of the material forming the side surface 57b may be higher than that of the material forming the side surface 56a. In this case, heat from the object to be measured 3 is more easily transferred from the side surface 57b, and the temperature of the object to be measured 3 is measured more accurately.

[0085] In the sensor case 20B, the side surface 26d may be aligned with the Z-axis direction and extend in the X-axis direction. The retaining member 30 may further include a second wall portion 31b facing the side surface 26d. In this case, the second wall portion 31b of the retaining member 30 engages with the side surface 26d, and the sensor case 20 is held more stably by the retaining member 30. Temperature sensor units 2A, 2B, 2C, 2D, and 2E have a similar configuration and provide similar effects.

[0086] In the sensor case 20B, the retaining member 30B may further include a third wall portion 61c facing the side surface 26c. In this case, the sensor case 20B is sandwiched between the second wall portion 61d and the third wall portion 61c, and the sensor case 20B is held more stably by the retaining member 30B. Temperature sensor units 2C, 2D, and 2E have a similar configuration and provide similar effects.

[0087] In the sensor case 20B, the retaining member 30B may form an opening γ2 in which the side surface 26d is exposed from the second wall portion 61b when viewed from a direction perpendicular to the side surface 26d. In this case, the position of the sensor case 20B can be confirmed from the opening γ2, and the assembly accuracy of the sensor case 20B can be confirmed. Temperature sensor units 2C, 2D, and 2E have a similar configuration and provide similar effects.

[0088] In the sensor case 20, the temperature sensor 10 may include a detection unit 11 housed inside the main body 21. The detection unit 11 may include a portion that does not overlap with the through-hole 23a when viewed from a direction perpendicular to the side surface 26a. In this case, the detection unit 11 is less susceptible to the influence of heat conduction from the through-hole 23a, and can measure the temperature more accurately. Temperature sensor units 2A, 2B, 2C, 2D, and 2E have a similar configuration and provide similar effects.

[0089] While embodiments of the present invention have been described above, the present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. For example, at least two of the configurations of the temperature sensor units 2, 2A, 2B, 2C, 2D, and 2E may be combined. For example, the holding member 30 of the temperature sensor unit 2 may be combined with the sensor cases 20D and 20E of the temperature sensor units 2D and 2E. In this case, the shape of the through-hole α is formed to match the sensor cases 20D and 20E.

[0090] For example, the sensor case 20A of temperature sensor unit 2A may be combined with the holding members 30B, 30C, 30D, and 30E of temperature sensor units 2B, 2C, 2D, and 2E. In this case, the shape of the through-hole α is formed to match the sensor cases 20D and 20E.

[0091] For example, the side surfaces of the sensor cases 20, 20B, 20C, and 20D of the temperature sensor units 2, 2B, 2C, 2D, and 2E that come into contact with the object to be measured 3 may have a higher thermal conductivity than the material forming the side surface 56a, as is the case with sensor case 20A.

[0092] For example, the side surfaces of the sensor cases 20A, 20B, 20C, and 20D of the temperature sensor units 2A, 2B, 2C, 2D, and 2E that come into contact with the object to be measured 3 may be curved, as in the case 20.

[0093] As can be seen from the above-described embodiments and modifications, this specification includes the following embodiments. (Note 1) A temperature sensor and A sensor case comprising a main body extending in a first direction and housing the temperature sensor, and at least one protrusion projecting from the main body in a second direction intersecting the first direction, The system includes a holding member for holding the sensor case, The main body has a first side surface and a second side surface that are aligned with the first direction, The retaining member includes a first portion that is in contact with the first side surface and has a through hole through which the protruding portion passes. The at least one projection includes a through portion that protrudes from the first side in the second direction and passes through the through hole, and a tip portion that is connected to the through portion on the side opposite to the first side. The tip portion has opposing surfaces that face the first portion and that face the first side surface, sandwiching the first portion, in a temperature sensor unit. (Note 2) The sensor case includes a plurality of the aforementioned protrusions, The temperature sensor unit as described in Appendix 1, wherein the first part has a plurality of through holes through which each of the plurality of protrusions passes. (Note 3) The temperature sensor unit according to Appendix 1 or Appendix 2, wherein the maximum width in the first direction is greater than the maximum width in the third direction intersecting the first and second directions in the protruding portion. (Note 4) The temperature sensor unit according to any one of the appendices 1 to 3, wherein the second side surface is curved and configured to contact an object whose temperature is to be measured by the temperature sensor. (Note 5) The second side is configured to be in contact with the object to be measured. The temperature sensor unit according to any one of the appendices 1 to 4, wherein the thermal conductivity of the material forming the second surface is higher than that of the material forming the first surface. (Note 6) The main body further has a third side surface that is aligned with the first direction and extends in the second direction, The temperature sensor unit according to any one of Appendix 1 to Appendix 5, wherein the holding member further includes a second portion facing the third side surface. (Note 7) The main body further includes a fourth side facing the third side, The temperature sensor unit according to Appendix 6, wherein the holding member further includes a third portion facing the fourth side surface. (Note 8) The temperature sensor unit according to Appendix 6 or Appendix 7, wherein the holding member forms an opening in which the third side surface is exposed from the second portion when viewed from a direction perpendicular to the third side surface. (Note 9) The temperature sensor includes a temperature-sensing element housed inside the main body. The temperature sensor unit according to any one of Appendix 1 to Appendix 8, wherein the temperature sensing element includes a portion that does not overlap with the through portion when viewed from a direction perpendicular to the first side surface. (Note 10) A temperature sensor unit described in any one of the appendices 1 to 9, A temperature sensor assembly comprising an object whose temperature is to be measured by the aforementioned temperature sensor. (Note 11) A sensor case comprising a main body portion that extends in a first direction and has a first side surface and a second side surface that are aligned with the first direction, and which houses a temperature sensor, and at least one protruding portion that protrudes from the main body portion, and a holding member that includes a first portion having a through hole and which holds the sensor case, wherein the at least one protruding portion is inserted into the through hole, A method for assembling a temperature sensor, comprising crimping the tip of at least one protruding portion inserted into the through hole to form a through portion that penetrates the first portion in the through hole, and a tip portion that is connected to the through portion and has an opposing surface that faces the first portion and faces the opposite side of the first side with respect to the first portion. [Explanation of symbols]

[0094] 1...Assembly, 2,2A,2B,2C,2D,2E...Temperature sensor unit, 3...Measurement object, 10...Temperature sensor, 20,20A,20B,20C,20D,20E...Sensor case, 21,50...Main body, β1, β2, γ1, γ2...Opening, 23,43,53,73, 83,93...Protruding part, 23a...Penetration part, 23b...Tip part, 23e...Opposing surface, 30,30A,30B,30C,30D,30E...Holding member, 31a,52,61a,61g,61h,61k...First wall part, 31b,61b...Second wall part, 61c...Third wall part, α...Through hole.

Claims

1. A temperature sensor and A sensor case comprising a main body extending in a first direction and housing the temperature sensor, and at least one protrusion projecting from the main body in a second direction intersecting the first direction, The system includes a holding member for holding the sensor case, The main body has a first side surface and a second side surface that are aligned with the first direction, The retaining member includes a first portion that is in contact with the first side surface and has a through hole through which the protruding portion passes. The at least one projection includes a through portion that protrudes from the first side in the second direction and passes through the through hole, and a tip portion that is connected to the through portion on the side opposite to the first side. The tip portion has opposing surfaces that face the first portion and that face the first side surface, sandwiching the first portion, in a temperature sensor unit.

2. The sensor case includes a plurality of the aforementioned protrusions, The temperature sensor unit according to claim 1, wherein the first part has a plurality of through holes through which each of the plurality of protrusions passes.

3. The temperature sensor unit according to claim 1, wherein the maximum width in the first direction is greater than the maximum width in the third direction intersecting the first and second directions in the protruding portion.

4. The temperature sensor unit according to claim 1, wherein the second side surface is curved and configured to contact an object whose temperature is to be measured by the temperature sensor.

5. The second side is configured to be in contact with the object to be measured. The temperature sensor unit according to claim 1, wherein the thermal conductivity of the material forming the second surface is higher than that of the material forming the first surface.

6. The main body further has a third side surface that is aligned with the first direction and extends in the second direction, The temperature sensor unit according to claim 1, wherein the holding member further includes a second portion facing the third side surface.

7. The main body further includes a fourth side facing the third side, The temperature sensor unit according to claim 6, wherein the holding member further includes a third portion facing the fourth side surface.

8. The temperature sensor unit according to claim 6 or 7, wherein the holding member has an opening that, when viewed from a direction perpendicular to the third side surface, exposes the third side surface from the second portion.

9. The temperature sensor includes a temperature-sensing element housed inside the main body. The temperature sensor unit according to claim 1, wherein the temperature sensing element includes a portion that does not overlap with the through portion when viewed from a direction perpendicular to the first side surface.

10. A temperature sensor unit according to any one of claims 1 to 9, A temperature sensor assembly comprising an object whose temperature is to be measured by the aforementioned temperature sensor.

11. A sensor case comprising a main body portion that extends in a first direction and has a first side surface and a second side surface that are aligned with the first direction, and which houses a temperature sensor, and at least one protruding portion that protrudes from the main body portion, and a holding member that includes a first portion having a through hole and which holds the sensor case, wherein the at least one protruding portion is inserted into the through hole, A method for assembling a temperature sensor, comprising crimping the tip of at least one protrusion inserted into the through hole to form a through portion that penetrates the first portion in the through hole, and a tip portion that is connected to the through portion and has an opposing surface that faces the first portion and faces the opposite side of the first side with respect to the first portion.

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