JP6876512B2 - Temperature detector - Google Patents

Description

The present invention relates to a temperature detector.

Conventionally, there is a temperature detection device. Patent Document 1 provides a current fuse function unit for blocking an overcurrent in one of the power supply terminals of a pair of power supply terminals that supply a current to a positive characteristic thermistor element, and a positive characteristic thermistor element in the other power supply terminal. Disclosed is a technique of a positive characteristic thermistor device provided with a temperature fusing function unit for fusing due to abnormal heat generation.

Jikkenhei 5-6784 Gazette

A temperature monitoring unit such as a temperature monitoring circuit may be connected to the temperature detection element. There is still room for improvement in protecting the temperature monitor. For example, when the object to be detected by the temperature detection element is a high-voltage device, it is desirable that the temperature monitoring unit can be protected more reliably.

An object of the present invention is to provide a temperature detecting device capable of protecting a temperature monitoring unit.

The temperature detection device of the present invention includes a temperature detection unit having a temperature detection element, a conductor for electrically connecting the temperature detection element and the temperature monitoring unit, a terminal on the power supply side, and a terminal on the electric load side. A wall portion that fits into the relay terminal so as to surround the relay terminal, and an accommodating portion that is provided at a position opposite to the relay terminal side with respect to the wall portion and accommodates the temperature detection unit. A conductive fitting member having, and an insulating holding portion that is interposed between the accommodating portion and the conductor to hold the conductor, and the conductor is the conductor. The conductor has a fusing portion that is more easily fused than the other portions, and at least one of the conductor and the accommodating portion has the conductor at a position closer to the temperature detecting element than the fusing portion in the conductor. It is characterized in that a proximity portion is provided so that the thickness of the holding portion between the and the accommodating portion is made thinner than the thickness of the holding portion between the conductor and the accommodating portion in another portion. To do.

The temperature detection device according to the present invention includes a temperature detection unit having a temperature detection element, a conductor for electrically connecting the temperature detection element and the temperature monitoring unit, a terminal on the power supply side, and a terminal on the electric load side. Conductive with a wall portion fitted to the relay terminal so as to surround the relay terminal to be connected to, and an accommodating portion provided at a position opposite to the relay terminal side with respect to the wall portion and accommodating the temperature detection unit. It is provided with a sex fitting member and an insulating holding portion that is interposed between the accommodating portion and the conductor to hold the conductor.

The conductor has a fusing portion configured to be more easily fused than other portions in the conductor, and at least one of the conductor and the accommodating portion is conductive at a position closer to the temperature detection element than the fusing portion in the conductor. A proximity portion is provided that makes the thickness of the holding portion between the body and the accommodating portion thinner than the thickness of the holding portion between the conductor and the accommodating portion in other portions. According to the temperature detection device according to the present invention, when the insulation resistance of the holding portion is lowered, the insulation resistance is likely to be lowered at the portion where the proximity portion is arranged. As a result, there is an effect that the fusing part can be more reliably fusing and the temperature monitoring part can be protected.

FIG. 1 is a perspective view showing a temperature detection device of the first embodiment attached to a relay terminal. FIG. 2 is a plan view showing the temperature detection device of the first embodiment attached to the relay terminal. FIG. 3 is a perspective view showing an example of an electrical connection box in which a temperature detection device is housed. FIG. 4 is an exploded perspective view of the electrical junction box. FIG. 5 is a perspective view of the relay terminal. FIG. 6 is a perspective view of the temperature detection device according to the first embodiment. FIG. 7 is a perspective view of the fitting member according to the first embodiment. FIG. 8 is a perspective view showing the internal configuration of the temperature detection unit according to the first embodiment. FIG. 9 is a perspective view of the temperature detection unit according to the first embodiment. FIG. 10 is a plan view showing the arrangement of the temperature detection unit in the fitting member. FIG. 11 is a diagram showing a mating direction between the temperature detection device and the relay terminal. FIG. 12 is a cross-sectional view illustrating the force applied by the spring portion. FIG. 13 is a perspective view showing a main part of the temperature detection device according to the first embodiment. FIG. 14 is a perspective view showing a main part of the temperature detection device according to the second embodiment. FIG. 15 is a side view showing a main part of the temperature detection device according to the second embodiment. FIG. 16 is a perspective view showing a main part of the temperature detection device according to the third embodiment. FIG. 17 is a side view showing a main part of the temperature detection device according to the third embodiment. FIG. 18 is a side view showing a main part of the temperature detection device according to the fourth embodiment. FIG. 19 is a side view showing a main part of the temperature detection device according to the fifth embodiment.

Hereinafter, the temperature detection device according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[First Embodiment]
The first embodiment will be described with reference to FIGS. 1 to 13. The present embodiment relates to a temperature detection device. FIG. 1 is a perspective view showing the temperature detection device of the first embodiment attached to the relay terminal, FIG. 2 is a plan view showing the temperature detection device of the first embodiment attached to the relay terminal, and FIG. 3 is a plan view. A perspective view showing an example of an electric junction box in which a temperature detection device is housed, FIG. 4 is an exploded perspective view of the electric junction box, FIG. 5 is a perspective view of a relay terminal, and FIG. A perspective view of the detection device, FIG. 7 is a perspective view of the fitting member according to the first embodiment, FIG. 8 is a perspective view showing an internal configuration of the temperature detection unit according to the first embodiment, and FIG. 9 is a first perspective view. A perspective view of the temperature detection unit according to the embodiment, FIG. 10 is a plan view showing the arrangement of the temperature detection unit in the fitting member, and FIG. 11 is a view showing the fitting direction between the temperature detection device and the relay terminal, FIG. Is a cross-sectional view illustrating the force applied by the spring portion, and FIG. 13 is a perspective view showing a main part of the temperature detection device according to the first embodiment. FIG. 12 shows a cross section of XII-XII of FIG.

As shown in FIGS. 1 and 2, the temperature detection device 1 according to the present embodiment includes a fitting member 4 and a temperature detection unit 5. The fitting member 4 has wall portions 41, 42, 43, 44, 45 that are fitted to the relay terminal 3 so as to surround the relay terminal 3. The temperature detection unit 5 is fixed to the outer surface of the fitting member 4. The temperature detection unit 5 detects the temperature of the relay terminal 3. The temperature detection unit 5 is electrically connected to the temperature monitoring device 60, and outputs a detection result to the temperature monitoring device 60.

The relay terminal 3 is arranged inside the electrical connection box 100 shown in FIGS. 3 and 4, for example. The electric junction box 100 is connected to, for example, a power source such as a high-voltage battery mounted on a vehicle such as an automobile. The high-voltage battery is a power source for traveling the vehicle, and supplies electric power to an electric load such as a motor generator for traveling. The electric junction box 100 is interposed between the power source and the electric load, and controls the power supply to the electric load. The relay terminal 3 connects a terminal on the power supply side and a terminal on the electric load side. The relay terminal 3 of this embodiment is a so-called female-female terminal, and electrically connects two male terminals.

As shown in FIGS. 3 and 4, the electrical junction box 100 has a case 101 and a cover (not shown). The cover closes the opening of the case 101 to form a housing together with the case 101. The case 101 is molded of an insulating synthetic resin or the like. A bus bar 2 is arranged inside the case 101. The bus bar 2 is held by the case 101. The bus bar 2 is a conductive member formed of a conductive metal plate. The bus bar 2 has a main body 21 and a terminal portion 22. The main body 21 and the terminal portion 22 are formed by bending or the like of the base material of the metal plate. The main body 21 is a flat plate-shaped component and is held by the case 101. The terminal portion 22 is bent so as to be orthogonal to the main body 21. The terminal portion 22 is a flat plate-shaped constituent portion and has an engaging portion that engages with the relay terminal 3.

The terminal portion 22 is inserted into the relay terminal 3 and engages with the relay terminal 3. The relay terminal 3 is held by the case 101 via the bus bar 2 and is held by the cover of the case 101. As shown in FIG. 12, a terminal 6 on the electric load side is connected to the relay terminal 3 in addition to the terminal portion 22. This terminal 6 is, for example, a male terminal of a relay. The relay is held by the holding means provided on the cover of the electrical junction box 100. The terminal 6 is inserted into the relay terminal 3 through an insertion hole provided in the cover. As shown in FIG. 12, the terminal 6 is inserted into the relay terminal 3 from the side opposite to the terminal portion 22 and engages with the relay terminal 3. That is, two male terminals (terminal portion 22, terminal 6) are inserted into the relay terminal 3 in different directions.

As shown in FIG. 5, the relay terminal 3 is a member whose overall shape is a rectangular parallelepiped. The relay terminal 3 is a conductive member formed of a conductive metal plate. The relay terminal 3 is formed by, for example, bending a copper plate or the like. The relay terminal 3 may be plated with tin or the like. The relay terminal 3 has a main body 30 and a spring portion 33. The main body 30 is a square tubular component, and both ends are open. The spring portion 33 is formed by bending a part of a metal plate which is a base material. The tip of the spring portion 33 is folded back into a U shape, and the end portion (hereinafter, referred to as "base end portion") 33a on the main body 30 side is folded back into a U shape. The spring portion 33 is bent at the base end portion 33a so that the tip portion bent into a U shape is located in the internal space of the main body 30.

The relay terminal 3 has a first insertion port 31 and a second insertion port 32. The first insertion port 31 is an opening on one side of the main body 30. The second insertion port 32 is an opening on the other side of the main body 30. As shown in FIG. 12, the terminal 6 on the electric load side is inserted into the first insertion port 31. The terminal 6 is inserted between the wall portion 30a of the main body 30 and the spring portion 33. The spring portion 33 presses the terminal 6 toward the wall portion 30a and holds the terminal 6. The terminal portion 22, that is, the terminal on the power supply side is inserted into the second insertion port 32. The terminal portion 22 is inserted between the wall portion 30b of the main body 30 and the spring portion 33. The spring portion 33 presses the terminal portion 22 toward the wall portion 30b and holds the terminal portion 22. The terminal 6 may be connected to the power supply side, and the terminal portion 22 may be connected to the electric load side.

As shown in FIG. 6, the fitting member 4 has a first wall portion 41, a second wall portion 42, a third wall portion 43, a fourth wall portion 44, a fifth wall portion 45, and a housing portion 46. The five wall portions 41, 42, 43, 44, 45 are connected in this order. The five wall portions 41, 42, 43, 44, 45, and the accommodating portion 46 are formed by processing such as bending of a metal plate. The wall portions 41, 42, 43, 44, 45 and the accommodating portion 46 are integrated. The first wall portion 41 is one end of the wall portions 41, 42, 43, 44, 45 formed of a metal plate, and the fifth wall portion 45 is the other end of the wall portions 41, 42, 43, 44, 45. It is a department.

The wall portions 41, 42, 43, 44, 45 are bent so as to surround the relay terminal 3. The main body 30 of the relay terminal 3 of the present embodiment has a rectangular cross-sectional shape. Corresponding to the shape of the main body 30, the wall portions 41, 42, 43, 44, 45 are bent so as to have a rectangular cross-sectional shape. More specifically, the first wall portion 41 and the third wall portion 43 face each other, and the second wall portion 42 and the fourth wall portion 44 face each other. Further, the extending direction of the first wall portion 41 and the third wall portion 43 is orthogonal to the extending direction of the second wall portion 42 and the fourth wall portion 44.

In the following description, the direction in which the second wall portion 42 and the fourth wall portion 44 face each other is referred to as "width direction X", and the direction in which the first wall portion 41 and the third wall portion 43 face each other is referred to as the "depth direction". It is called "Y". The width direction X and the depth direction Y are orthogonal to each other. The direction orthogonal to each of the width direction X and the depth direction Y is referred to as "height direction Z". The height direction Z coincides with the axial direction of the relay terminal 3. The electric junction box 100 is mounted on the vehicle so that the height direction Z coincides with the vehicle vertical direction, for example. The upper side and the lower side in the following description correspond to the upper side and the lower side of the vehicle when the electric junction box 100 is mounted on the vehicle. However, the upper side and the lower side in the following description may be different from the upper side and the lower side of the vehicle when the electric junction box 100 is actually mounted on the vehicle. For example, the electric junction box 100 may be mounted on the vehicle so that the height direction Z is in the vehicle front-rear direction, or may be mounted on the vehicle so that the height direction Z is in the vehicle left-right direction.

The fifth wall portion 45 faces the first wall portion 41 from the side opposite to the temperature detection unit 5 side in the depth direction Y. The fifth wall portion 45 extends in the width direction X from the end portion of the fourth wall portion 44 toward the second wall portion 42 side. The fitting member 4 is formed so as to have a gap between the first wall portion 41 and the fifth wall portion 45 in the depth direction Y. The size of the distance between the first wall portion 41 and the fifth wall portion 45 in the depth direction Y is determined so as to suppress the amount of deformation of the first wall portion 41 within an allowable range, as will be described later.

The accommodating portion 46 is connected to the lower end of the third wall portion 43. As shown in FIGS. 2 and 6, the accommodating portion 46 accommodates and holds the temperature detecting unit 5 at a position opposite to the first wall portion 41 side of the third wall portion 43. As shown in FIG. 7, the accommodating portion 46 has a bottom wall portion 46a, a first side wall portion 46b, and a second side wall portion 46c. The bottom wall portion 46a, the first side wall portion 46b, and the second side wall portion 46c are formed by processing such as bending the metal plate. The bottom wall portion 46a projects from the lower end of the third wall portion 43 toward the side opposite to the first wall portion 41 side. The first side wall portion 46b projects upward from the bottom wall portion 46a and faces the third wall portion 43. The second side wall portion 46c projects upward from the end portion of the bottom wall portion 46a on the second wall portion 42 side. A storage space for accommodating the temperature detection unit 5 is formed by the third wall portion 43, the bottom wall portion 46a, the first side wall portion 46b, and the second side wall portion 46c.

As shown in FIGS. 8 and 9, the temperature detection unit 5 includes an element unit 51, leads 52, 54, and a coating unit 58. The temperature detection unit 5 constitutes a temperature detection unit together with the coated electric wires 53 and 55 and the connector 57. The element portion 51 includes a temperature detection element 51a and an element coating portion 51b. The temperature detection element 51a is an element whose electrical characteristics such as resistance value change according to the temperature, and is, for example, a thermistor. A pair of leads 52 and 54 are electrically connected to the temperature detecting element 51a. The tip portions of the temperature detection element 51a and the leads 52 and 54 are covered with the element coating portion 51b. The element covering portion 51b is made of, for example, glass. The core wires 53a and 55a of the coated electric wires 53 and 55 are electrically connected to the leads 52 and 54 by solder 56, respectively. The coated wires 53 and 55 are connected to the connector 57. The element covering portion 51b may be made of resin or the like instead of glass.

As shown in FIG. 2, the connector 57 is connected to the temperature monitoring device 60 via the electric wire 59. More specifically, the connector 57 is connected to the temperature monitoring unit 60a of the temperature monitoring device 60. The temperature monitoring device 60 is mounted in the battery pack of the battery together with the electric junction box 100, for example. The temperature monitoring device 60 has a function of monitoring the temperature of the battery pack and a function of monitoring the temperature of the relay terminal 3. The temperature monitoring unit 60a is a monitoring unit that monitors the temperature of the relay terminal 3, for example, an electronic circuit. The temperature detection element 51a of the temperature detection unit 5 is electrically connected to the temperature monitoring unit 60a via the leads 52, 54, the coated electric wires 53, 55, the connector 57, and the electric wire 59. The temperature monitoring unit 60a may control the current value flowing between the terminal unit 22 and the terminal 6 based on the detected temperature of the relay terminal 3.

The element portion 51 and the leads 52 and 54 are covered with the covering portion 58 as shown in FIG. The coating portion 58 is an insulating coating formed of an insulating synthetic resin such as an epoxy resin. The covering portion 58 integrally covers the element portion 51, the leads 52, 54, the solder 56, and the covering core wires 53a, 55a. The covering portion 58 also covers the coverings of the electric wires 53 and 55 so that the core wires 53a and 55a are not exposed. That is, the covering portion 58 electrically shields the conductor portions such as the leads 52, 54, the solder 56, and the core wires 53a, 55a from the fitting member 4.

The covering portion 58 has a tip portion 58a, a central portion 58b, and a base end portion 58c. The tip portion 58a is a portion that covers the element portion 51. The central portion 58b is a constricted portion in the covering portion 58 and covers the leads 52 and 54. The base end portion 58c is a portion that covers the coating of the solder 56, the core wires 53a, 55a, and the coated electric wires 53, 55. As described below, the covering portion 58 is sealed in the accommodating portion 46 of the fitting member 4 and fixed to the accommodating portion 46.

As shown in FIG. 10, the temperature detection unit 5 is placed on the accommodating unit 46. More specifically, the temperature detection unit 5 is placed on the bottom wall portion 46a so that the tip portion 58a of the covering portion 58 is in contact with or close to the second side wall portion 46c. In other words, the temperature detecting unit 5 is placed on the accommodating unit 46 so that the coated electric wires 53 and 55 project from the accommodating unit 46 in the width direction X. A part of the base end portion 58c may protrude outward from the accommodating portion 46. From this state, resin is injected into the accommodating portion 46, and the covering portion 58 is fixed to the accommodating portion 46. The resin to be injected is an insulating synthetic resin, for example, an epoxy resin. The resin to be injected is preferably a resin having high heat transfer properties. The synthetic resin filled between the covering portion 58 and the accommodating portion 46 may be the same as the synthetic resin constituting the covering portion 58, or may be another synthetic resin. The injected resin solidifies to form the filling portion 7 shown in FIG. The filling unit 7 holds the temperature detecting unit 5. The filling portion 7 is held by the accommodating portion 46 and the third wall portion 43. As shown in FIG. 12, the covering portion 58 serves as a holding portion 8 for holding the element portion 51 and the leads 52 and 54 in cooperation with the filling portion 7. The covering portion 58 and the filling portion 7 are interposed between the accommodating portion 46 and the leads 52 and 54 to hold the leads 52 and 54.

In the temperature detection device 1 of the present embodiment, heat is transferred from the relay terminal 3 to the temperature detection unit 5 via the fitting member 4 and the filling unit 7. Here, in order for the temperature detection unit 5 to accurately detect the temperature of the relay terminal 3, it is desirable that the temperature transmission path is appropriately secured. For example, in the present embodiment, the third wall portion 43 exists between the temperature detection unit 5 and the relay terminal 3. If the contact state between the third wall portion 43 and the relay terminal 3 is stable, the heat transfer path between the temperature detection unit 5 and the relay terminal 3 is stable. As a result, the temperature detection unit 5 can accurately detect the temperature of the relay terminal 3.

The fitting member 4 of the present embodiment has a spring portion that applies an elastic force toward the temperature detecting portion 5 side to the relay terminal 3. The spring portion of the present embodiment is the first wall portion 41. The first wall portion 41 is supported in a cantilever shape. More specifically, the first wall portion 41 is supported at the end portion on the second wall portion 42 side, and the end portion on the fourth wall portion 44 side is a free end. Therefore, the first wall portion 41 functions as a leaf spring that bends and deforms in the depth direction Y. In the fitting member 4 of the present embodiment, the distance Y1 between the first wall portion 41 and the third wall portion 43 is set so that the first wall portion 41 presses the relay terminal 3 toward the third wall portion 43 (FIG. 10) is designed. The interval Y1 is an interval when the fitting member 4 is not fitted to the relay terminal 3, in other words, when no external force is applied to the fitting member 4. The fitting member 4 is configured so that the first wall portion 41 bends and deforms toward the fifth wall portion 45 when fitted with the relay terminal 3.

The first wall portion 41 is provided with a protrusion 41a. The protruding portion 41a protrudes toward the third wall portion 43 side. The protrusion 41a is provided on the first wall 41 at a position closer to the second wall 42 than the central position in the width direction X. In other words, the protrusion 41a is arranged on the proximal end side of the first wall 41. The position of the protrusion 41a on the first wall 41 in the width direction X may be a position corresponding to the position of the tip 58a. As shown in FIG. 10, in the present embodiment, the position of the protrusion 41a in the width direction X is close to the position of the tip portion 58a in the width direction X. That is, the protrusion 41a projects in the depth direction Y toward the tip 58a and faces the tip 58a in the depth direction Y. In this case, the relay terminal 3 can be pressed against the portion of the third wall portion 43 in the vicinity of the tip portion 58a. As can be seen from FIG. 1 and the like, the protrusion 41a extends in the height direction Z from the lower end to the vicinity of the upper end of the first wall portion 41.

In assembling the relay terminal 3 to the electrical junction box 100, first, the fitting member 4 is fitted to the relay terminal 3. As shown in FIG. 11, the relay terminal 3 is inserted through the opening 40 on the upper side of the fitting member 4. At this time, the relay terminal 3 is inserted between the first wall portion 41 and the third wall portion 43 while bending and deforming the first wall portion 41. The relay terminal 3 bends and deforms the first wall portion 41 in a direction away from the third wall portion 43. The bent and deformed first wall portion 41 presses the relay terminal 3 toward the third wall portion 43. In other words, the first wall portion 41 presses the relay terminal 3 toward the temperature detection portion 5 side. Therefore, a stable contact state between the relay terminal 3 and the third wall portion 43 is maintained.

In the fitting member 4 of the present embodiment, the protrusion 41a is provided on the first wall portion 41. Therefore, the variation in the contact position between the first wall portion 41 and the relay terminal 3 is suppressed. In other words, the target position of the first wall portion 41 can be brought into contact with the relay terminal 3. Therefore, a stable contact state between the relay terminal 3 and the third wall portion 43 is maintained. Further, the pressing force with which the first wall portion 41 presses the relay terminal 3 is likely to be stable.

The relay terminal 3 inserted into the fitting member 4 is locked by the locking portions 42a and 44a shown in FIG. The locking portions 42a and 44a are provided at the lower ends of the fitting member 4 and project in the width direction X. The locking portion 42a projects from the lower end of the second wall portion 42 toward the fourth wall portion 44 side. The locking portion 44a projects from the lower end of the fourth wall portion 44 toward the second wall portion 42 side. The locking portions 42a and 44a position the relay terminal 3 in the height direction Z.

The second wall portion 42 and the fourth wall portion 44 are provided with protrusions 42b and 44b that project toward the wall portions 42 and 44 on the opposite side, respectively. The protrusions 42b and 44b face each other in the width direction X. The protrusions 42b and 44b suppress the occurrence of a gap between the relay terminal 3 and the wall portions 42 and 44. The protrusions 42b and 44b suppress the rattling between the relay terminal 3 and the fitting member 4. The protrusions 42b and 44b can stabilize the contact state between the third wall portion 43 and the relay terminal 3.

The relay terminal 3 fitted with the fitting member 4 is assembled to the bus bar 2. The relay terminal 3 is assembled to, for example, the bus bar 2 previously held by the case 101. After the relay terminal 3 is assembled to the terminal portion 22 of the bus bar 2, the temperature monitoring device 60 is connected to the connector 57 of the temperature detection unit 5. Further, a terminal 6 on the electric load side is connected to the relay terminal 3.

As shown in FIG. 12, the first wall portion 41 of the fitting member 4 applies a force F1 to the wall portion 30b of the relay terminal 3. The force F1 is a force toward the temperature detection unit 5 in the depth direction Y. The force F1 presses the wall portion 30a of the relay terminal 3 toward the third wall portion 43. In the present embodiment, the contact surfaces 30c and 43a that come into contact with the other party in the wall portion 30a and the third wall portion 43 are flat surfaces, respectively. The contact surfaces 30c and 43a come into contact with each other by the force F1, and for example, they come into close contact with each other. Therefore, a heat transfer path is secured from the wall portion 30a toward the temperature detecting portion 5 via the third wall portion 43 and the filling portion 7. Therefore, the temperature detection device 1 of the present embodiment can improve the detection accuracy of detecting the temperature of the relay terminal 3.

As described below, the fitting member 4 of the present embodiment has a regulating portion that regulates the movable range of the first wall portion 41. The fifth wall portion 45 is an outer regulating portion that regulates the first wall portion 41 from being excessively deformed in a direction away from the temperature detecting portion 5. As shown in FIG. 2, the fifth wall portion 45 faces the first wall portion 41 from the side opposite to the temperature detection unit 5 side in the depth direction Y. The first wall portion 41 applies a force F1 toward the temperature detecting portion 5 side to the relay terminal 3. The direction of the force F1 is the depth direction Y. That is, the fifth wall portion 45 faces the relay terminal 3 with the first wall portion 41 in the direction of the force F1.

When the relay terminal 3 and the fitting member 4 are fitted, the first wall portion 41 receives the reaction force of the force F1 and is deformed toward the side opposite to the temperature detecting portion 5 side. When the relay terminal 3 is inserted at an angle, the amount of deformation of the first wall portion 41 may become too large. When the first wall portion 41 is deformed in a direction away from the temperature detecting portion 5, the fifth wall portion 45 comes into contact with the first wall portion 41 to regulate further deformation of the first wall portion 41. The fifth wall portion 45 is configured to come into contact with the first wall portion 41 before the first wall portion 41 is plastically deformed. That is, the fifth wall portion 45 comes into contact with the first wall portion 41 before the deformation amount of the first wall portion 41 reaches the deformation amount of the plastic deformation region. The operator who fits the relay terminal 3 and the fitting member 4 can easily determine whether or not the amount of deformation of the first wall portion 41 is within the permissible range. If the first wall portion 41 comes into contact with the fifth wall portion 45, it is known that some kind of trouble has occurred.

As shown in FIG. 1, the fourth wall portion 44 is provided with an inner regulating portion 44c. When the first wall portion 41 is deformed toward the temperature detection unit 5, the inner regulating portion 44c comes into contact with the first wall portion 41 to regulate further deformation of the first wall portion 41. The inner regulating portion 44c is a surface facing the side opposite to the temperature detecting portion 5 side in the depth direction Y. In the fitting member 4 of the present embodiment, as shown in FIG. 1, the height Z2 of the fifth wall portion 45 is smaller than the height Z1 of the fourth wall portion 44. According to the difference between the heights Z1 and Z2, the fourth wall portion 44 is provided with a step forming the inner regulating portion 44c. The inner regulating portion 44c is an end portion of the fourth wall portion 44 on the fifth wall portion 45 side, and is provided at the lower edge portion.

The first wall portion 41 has a locked portion 41b that is locked by the inner regulating portion 44c. The locked portion 41b is a single portion provided on the free end side of the first wall portion 41. The locked portion 41b is arranged at the lower end portion at the tip end of the first wall portion 41. The locked portion 41b extends in the space below the fourth wall portion 44 so as to intersect the fourth wall portion 44 when viewed in a plan view. The locked portion 41b faces the inner regulating portion 44c in the depth direction Y.

In the work of fitting the relay terminal 3 and the fitting member 4, the operator holds the fitting member 4. At this time, if the operator holds the fitting member 4 too strongly, the first wall portion 41 may be deformed too much toward the temperature detecting portion 5. The inner regulating portion 44c is configured to come into contact with the first wall portion 41 before the first wall portion 41 is plastically deformed. That is, the inner regulating portion 44c locks the locked portion 41b before the deformation amount of the first wall portion 41 reaches the deformation amount in the plastic deformation region. The operator can easily determine whether or not the amount of deformation of the first wall portion 41 is within the permissible range. If the first wall portion 41 comes into contact with the inner regulating portion 44c, it can be seen that the holding force of the operator is too strong.

The temperature detection device 1 of the present embodiment further has a protective means for protecting the temperature monitoring unit 60a. The temperature detection element 51a of the temperature detection device 1 is a low voltage component. Further, the temperature detection device 1 and the temperature monitoring device 60 are composed of low-voltage components. On the other hand, the relay terminal 3 is a high voltage component. The electric power supplied from the power source to the electric load of the motor generator or the like via the relay terminal 3 is, for example, a high voltage of about several hundred volts. In the temperature detection device 1, an insulating epoxy resin or the like is filled between the fitting member 4 which is a high voltage component and the temperature detection unit 5 which is a low voltage component, and sufficient insulation resistance is secured. However, if a higher voltage than expected in the specifications is applied to the relay terminal 3, or if a problem such as water intrusion into the accommodating portion 46 occurs, the insulation resistance may decrease between the high and low voltages. There is sex.

In the temperature detection device 1 of the present embodiment, as shown in FIG. 13, the leads 52 and 54 have fusing portions 52a and 54a. In FIG. 13, the covering portion 58 and the filling portion 7 are not shown. The fusing portions 52a and 54a are portions of the leads 52 and 54 that are more easily fractured than other portions. The fusing portions 52a and 54a of the present embodiment have a smaller cross-sectional area than the other portions of the leads 52 and 54. The blown portions 52a and 54a are fuse portions that blow faster than other portions when an overcurrent flows through the leads 52 and 54. The fusing portions 52a and 54a are provided, for example, in the vicinity of the connecting portions of the leads 52 and 54 with the coated electric wires 53 and 55. When a large current flows from the high-voltage circuit to the temperature detection unit 5 which is a low-voltage circuit due to a decrease in insulation resistance, the fusing portions 52a and 54a are fusing. Therefore, the temperature detecting device 1 of the present embodiment can protect the temperature monitoring device 60 by providing the fusing portions 52a and 54a.

In the temperature detection device 1 of the present embodiment, proximity portions 52b and 54b are further provided on the leads 52 and 54. The proximity portions 52b and 54b are a part of the leads 52 and 54. In the following description, the direction in which the leads 52 and 54 extend is simply referred to as "extending direction Ex". The extending direction Ex of the present embodiment is a direction along the width direction X. The proximity portions 52b and 54b are sections of the leads 52 and 54 on the side closest to the temperature detecting element 51a. More specifically, the leads 52, 54 of the present embodiment have proximity portions 52b, 54b, vertical portions 52c, 54c, and separation portions 52d, 54d. The proximity portions 52b, 54b, the vertical portions 52c, 54c, and the separation portions 52d, 54d are connected in series from the temperature detection element 51a toward the coated electric wires 53, 55 in this order. The leads 52 and 54 are bent at right angles at two positions to form proximity portions 52b and 54b, vertical portions 52c and 54c, and separation portions 52d and 54d. The portions between the two bent portions are the vertical portions 52c and 54c.

The proximity portions 52b and 54b extend along the upper surface 46d of the bottom wall portion 46a. The proximity portions 52b and 54b are arranged in parallel with the upper surface 46d, for example. The vertical portions 52c and 54c are portions extending in the vertical direction. The vertical portions 52c and 54c extend in a direction orthogonal to the upper surface 46d. The lower ends of the vertical portions 52c and 54c are connected to the proximity portions 52b and 54b, and the upper ends of the vertical portions 52c and 54c are connected to the separation portions 52d and 54d. The separation portions 52d and 54d are the portions of the leads 52 and 54 closest to the covered electric wires 53 and 55. The separating portions 52d and 54d extend from the upper ends of the vertical portions 52c and 54c to the core wires 53a and 55a of the coated electric wires 53 and 55. The separating portions 52d and 54d extend parallel to, for example, the upper surface 46d. The fusing portions 52a and 54a are provided in the separating portions 52d and 54d.

The distance (minimum distance) L1 between the proximity portions 52b, 54b and the upper surface 46d is smaller than the distance (minimum distance) L2 between the separation portions 52d, 54d and the upper surface 46d. That is, the distance L1 between the proximity portions 52b and 54b and the upper surface 46d is smaller than the distance between the other portions (vertical portions 52c and 54c, separation portions 52d and 54d) of the leads 52 and 54 and the upper surface 46d. The distance L1 between the proximity portions 52b and 54b and the upper surface 46d is determined based on the required insulation distance. The distance L1 is determined so that the proximity portions 52b, 54b and the upper surface 46d are electrically insulated by the holding portion 8 when the potential difference between the proximity portions 52b, 54b and the upper surface 46d is a predetermined maximum value. ing. The maximum value of the potential difference is based on, for example, a value defined in the vehicle specifications as the maximum voltage applied to the relay terminal 3.

The distance L1 may be, for example, half or about half the size of the distance L2. The distance L1 may be one-third or about one-third the size of the distance L2. The distance L1 may be defined in the range of 1/2 to 1/3 of the distance L2.

The thickness of the holding portion 8 is determined according to the distance L1 between the proximity portions 52b and 54b and the upper surface 46d and the distance L2 between the separation portions 52d and 54d and the upper surface 46d. That is, the thickness (minimum thickness) of the holding portion 8 between the proximity portions 52b, 54b and the accommodating portion 46 becomes equal to the distance L1, and the holding portion 8 between the separating portions 52d, 54d and the accommodating portion 46. The thickness (minimum thickness) of is equal to the distance L2.

Since the proximity portions 52b and 54b are provided as described above, when a situation occurs in which the insulation resistance of the holding portion 8 is lowered, the temperature detecting element 51a is insulated from the fusing portions 52a and 54a. The resistance tends to decrease. For example, it is assumed that a higher voltage than expected in the specifications is applied to the relay terminal 3. In this case, the possibility of a decrease in insulation resistance between the proximity portions 52b, 54b and the upper surface 46d is higher than the possibility of a decrease in insulation resistance at other portions of the leads 52, 54. As the insulation resistance decreases between the proximity portions 52b and 54b and the upper surface 46d, a current flows from the upper surface 46d to the proximity portions 52b and 54b. As a result, the fusing portions 52a and 54a are fusing to protect the temperature monitoring unit 60a. By providing the proximity portions 52b and 54b, the fuse function of the fusing portions 52a and 54a can be more reliably exhibited. Therefore, the temperature detection device 1 of the present embodiment can protect the temperature monitoring unit 60a.

In addition to the case where a higher voltage than expected in the specifications is applied, due to cracks generated in the holding part 8, water absorption of the holding part 8 or mixing of conductive foreign matter, water intrusion into the housing part 46, vibration or heat. The insulation resistance of the holding portion 8 may decrease. Even in such a case, the proximity portions 52b and 54b can prevent the portion where the decrease in insulation resistance occurs from becoming a portion closer to the temperature monitoring unit 60a than the fusing portions 52a and 54a.

As described above, the temperature detection device 1 of the present embodiment includes a temperature detection unit 5, a fitting member 4, and a holding unit 8. The temperature detection unit 5 includes a temperature detection element 51a, leads 52, 54, and core wires 53a, 55a. The leads 52, 54 and the core wires 53a, 55a are conductors that electrically connect the temperature detecting element 51a and the temperature monitoring unit 60a. The conductive fitting member 4 includes wall portions 41, 42, 43, 44, 45 that fit into the relay terminal 3 so as to surround the relay terminal 3 that connects the terminal portion 22 and the terminal 6, and the accommodating portion 46. Have. The accommodating portion 46 is provided at a position opposite to the relay terminal 3 side with respect to the third wall portion 43, and accommodates the temperature detecting unit 5. In the present embodiment, the terminal portion 22 is the terminal on the power supply side and the terminal 6 is the terminal on the electric load side. On the contrary, the terminal portion 22 is the terminal on the electric load side and the terminal 6 is the terminal on the power supply side. You may.

The holding unit 8 has an insulating property and holds the temperature detecting unit 5 by interposing between the accommodating unit 46 and the temperature detecting unit 5. The leads 52, 54 have fusing portions 52a, 54a configured to be more easily fusing than other portions of the leads 52, 54. The leads 52 and 54 are provided with proximity portions 52b and 54b. The proximity portions 52b and 54b are provided at positions on the leads 52 and 54 on the temperature detecting element 51a side of the fusing portions 52a and 54a. The thickness (distance L1) of the holding portion 8 between the leads 52, 54 and the accommodating portion 46 in the proximity portions 52b, 54b is the thickness (distance L1) of the holding portion 8 between the leads 52, 54 and the accommodating portion 46 in other portions. It is thinner than the thickness (for example, distance L2).

Therefore, when the insulation resistance is lowered in the holding portion 8, the reduction in the insulating resistance is likely to occur in the portion between the proximity portions 52b and 54b and the accommodating portion 46 in the holding portion 8. When the insulation resistance decreases, the fusing portions 52a and 54a flute to protect the temperature monitoring unit 60a. Therefore, the temperature detection device 1 of the present embodiment can appropriately protect the temperature monitoring unit 60a. In the present embodiment, since the fusing portions 52a and 54a are provided inside the electrical junction box 100, the range of influence when a decrease in insulation resistance occurs is limited to the inside of the electrical junction box 100.

The proximity portions 52b and 54b of the present embodiment are portions in which a part of the leads 52 and 54 is brought closer to the accommodating portion 46 than the other portions by bending the leads 52 and 54. The leads 52, 54 are bent so that the proximity portions 52b, 54b are closer to the upper surface 46d of the bottom wall portion 46a than the vertical portions 52c, 54c and the separation portions 52d, 54d. In addition to bending the leads 52 and 54, or in addition to bending the leads 52 and 54, the proximity portions 52b and 54b may be formed by bending the leads 52 and 54.

The fusing portions 52a and 54a of the present embodiment were portions in which the cross-sectional area of a part of the leads 52 and 54 was smaller than the cross-sectional area of the other part. However, the configuration of the fusing portions 52a and 54a is not limited to this. The fusing portions 52a and 54a may be configured so as to be easier to flute than the other portions of the leads 52 and 54. The fusing portions 52a and 54a may be portions of the leads 52 and 54 having a higher thermal resistance than the other portions.

In the present embodiment, the inner regulating portion 44c is provided at the lower edge portion of the fourth wall portion 44, and the locked portion 41b is provided at the lower end portion of the first wall portion 41. However, the positions of the inner regulating portion 44c and the locked portion 41b are not limited to this. For example, the inner regulating portion 44c may be provided at the upper edge portion of the fourth wall portion 44, and the locked portion 41b may be provided at the upper end portion of the first wall portion 41.

The proximity portions 52b and 54b may be close to the first side wall portion 46b, the second side wall portion 46c, and the third wall portion 43 instead of being close to the bottom wall portion 46a.

[Second Embodiment]
A second embodiment will be described with reference to FIGS. 14 and 15. Regarding the second embodiment, the components having the same functions as those described in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted. FIG. 14 is a perspective view showing a main part of the temperature detection device according to the second embodiment, and FIG. 15 is a side view showing a main part of the temperature detection device according to the second embodiment. The temperature detection device 1 of the second embodiment differs from the temperature detection device 1 of the first embodiment in that, for example, the leads 52 and 54 are provided with leg-shaped proximity portions 52e and 54e.

As shown in FIG. 14, the leads 52 and 54 of the second embodiment have main bodies 521 and 541 and proximity portions 52e and 54e. The main bodies 521 and 541 extend linearly along the extending direction Ex. The main bodies 521 and 541 extend parallel to, for example, the upper surface 46d. The proximity portions 52e and 54e project from the main body 521 and 541 toward the upper surface 46d in a leg shape. The proximity portions 52e and 54e are made of the same conductive metal as the main bodies 521 and 541. The proximity portions 52e and 54e are columnar or rod-shaped constituent portions. The cross-sectional shapes of the proximity portions 52e and 54e are, for example, rectangular. The proximity portions 52e and 54e may be integrally formed with the main bodies 521 and 541, or may be electrically connected to the main bodies 521 and 541.

The fusing portions 52a and 54a are provided in the main bodies 521 and 541. The proximity portions 52e and 54e are connected to the temperature detecting element 51a side of the fusing portions 52a and 54a. The proximity portions 52e and 54e project from the position on the temperature detecting element 51a side of the fusing portions 52a and 54a in the main bodies 521 and 541 toward the upper surface 46d. The proximity portions 52e and 54e are provided, for example, at positions slightly closer to the temperature detecting element 51a than the fusing portions 52a and 54a.

The distance (minimum distance) L3 between the tips of the proximity portions 52e and 54e and the upper surface 46d is smaller than the distance (minimum distance) L4 between the main body 521 and 541 and the upper surface 46d. That is, the distance L3 between the proximity portions 52e and 54e and the upper surface 46d is smaller than the distance between the other portions of the leads 52 and 54 and the upper surface 46d. The distance L3 is defined in the same manner as the distance L1 of the first embodiment, for example.

The thickness of the holding portion 8 is determined according to the distance L3 between the tips of the proximity portions 52e and 54e and the upper surface 46d and the distance L4 between the main body 521 and 541 and the upper surface 46d. That is, the thickness of the holding portion 8 between the tips of the proximity portions 52e and 54e and the accommodating portion 46 becomes equal to the distance L3, and the thickness of the holding portion 8 between the main body 521 and 541 and the accommodating portion 46 ( The minimum thickness) is equal to the distance L4.

When a situation occurs in which the insulation resistance of the holding portion 8 is lowered, there is a possibility that the insulation resistance is lowered between the proximity portions 52e and 54e and the upper surface 46d, and there is a possibility that the insulation resistance is lowered between the main body 521 and 541 and the upper surface 46d. Is more likely to cause a decrease in insulation resistance. Therefore, it is possible to prevent the insulation resistance from being lowered on the temperature monitoring unit 60a side rather than the fusing parts 52a and 54a. As a result, the fuse function of the fusing portions 52a and 54a can be more reliably exhibited as compared with the case where the proximity portions 52e and 54e are not provided.

The proximity portions 52e and 54e of the present embodiment are conductive legs that protrude from the leads 52 and 54 toward the accommodating portion 46. Even with such leg-shaped proximity portions 52e and 54e, the same effect as that of the proximity portions 52b and 54b of the first embodiment can be obtained. The proximity portions 52e and 54e may be close to the first side wall portion 46b, the second side wall portion 46c, and the third wall portion 43 instead of being close to the bottom wall portion 46a.

[Third Embodiment]
A third embodiment will be described with reference to FIGS. 16 and 17. Regarding the third embodiment, the components having the same functions as those described in the first embodiment and the second embodiment are designated by the same reference numerals, and duplicate description will be omitted. FIG. 16 is a perspective view showing a main part of the temperature detection device according to the third embodiment, and FIG. 17 is a side view showing a main part of the temperature detection device according to the third embodiment. In the third embodiment, the difference from each of the above embodiments is that, for example, the proximity portions 46e and 46f are provided in the accommodating portion 46.

As shown in FIG. 16, the accommodating portion 46 of the third embodiment has proximity portions 46e and 46f. The proximity portions 46e and 46f project from the upper surface 46d of the bottom wall portion 46a toward the leads 52 and 54. The leads 52 and 54 of the present embodiment extend linearly along the extending direction Ex. The leads 52 and 54 extend parallel to, for example, the upper surface 46d. In the leads 52, 54, the portion on the temperature detection element 51a side of the fusing portions 52a, 54a is referred to as the tip portion 522,542, and the portion on the coated electric wires 53, 55 side of the fusing portions 52a, 54a is referred to as the base end portion 523. It is called 543.

The proximity portions 46e and 46f are made of the same conductive metal as the accommodating portion 46. The proximity portions 46e and 46f of the present embodiment are protrusions having a rectangular cross-sectional shape. The shapes of the proximity portions 46e and 46f are tapered shapes in which the cross-sectional area decreases toward the tip. The proximity portions 46e and 46f may be formed integrally with the bottom wall portion 46a or may be electrically connected to the upper surface 46d of the bottom wall portion 46a, for example. In any case, the proximity portions 46e and 46f are conductive portions continuous with the upper surface 46d and form a part of the bottom wall portion 46a. One of the proximity portions 46e projects toward the tip end portion 522 of the lead 52. The other proximity portion 46f projects toward the tip portion 542 of the lead 54.

The proximity portions 46e and 46f project toward the tip portions 522 and 542 of the leads 52 and 54. In other words, the tips of the proximity portions 46e and 46f face the tip portions 522,542 in the height direction Z. The proximity portions 46e and 46f of the present embodiment are slightly opposed to the portions on the temperature detecting element 51a side of the fusing portions 52a and 54a at the tip portions 522 and 542 in the height direction Z.

As shown in FIG. 17, the distance (minimum distance) L5 between the tips of the proximity portions 46e and 46f and the leads 52 and 54 is smaller than the distance (minimum distance) L6 between the upper surface 46d and the leads 52 and 54. That is, the distance between the leads 52, 54 and the accommodating portion 46, in other words, the distance between the leads 52, 54 and the bottom wall portion 46a in the height direction Z is the minimum distance L5 at the tips of the proximity portions 46e, 46f. There is. The distance L5 is defined in the same manner as the distance L1 of the first embodiment, for example.

The thickness of the holding portion 8 is determined according to the distance L5 between the tips of the proximity portions 46e and 46f and the leads 52 and 54 and the distance L6 between the upper surface 46d and the leads 52 and 54. That is, the thickness of the holding portion 8 between the proximity portions 46e and 46f and the leads 52 and 54 is equal to the distance L5, and the thickness of the holding portion 8 between the upper surface 46d and the leads 52 and 54 is the distance. Equal to L6.

When a situation occurs in which the insulation resistance of the holding portion 8 is lowered, there is a possibility that the insulation resistance is lowered between the proximity portions 46e and 46f and the tip portions 522 and 542. It is more likely that the insulation resistance will decrease with and from 543. As a result, the fuse function of the fusing portions 52a and 54a can be more reliably exhibited as compared with the case where the proximity portions 46e and 46f are not provided on the bottom wall portion 46a.

The proximity portions 46e and 46f of the present embodiment are portions in which a part of the accommodating portion 46 protrudes toward the leads 52 and 54. The proximity portions 46e and 46f provided in the accommodation portion 46 can exert the same effect as the proximity portions 52b and 54b of the first embodiment. The proximity portions 46e and 46f may be arranged on the first side wall portion 46b, the second side wall portion 46c, and the third wall portion 43 instead of the bottom wall portion 46a.

[Fourth Embodiment]
A fourth embodiment will be described with reference to FIG. Regarding the fourth embodiment, the components having the same functions as those described in the first to third embodiments are designated by the same reference numerals, and duplicate description will be omitted. FIG. 18 is a side view showing a main part of the temperature detection device according to the fourth embodiment. In the fourth embodiment, the difference from each of the above embodiments is that, for example, the intermediate portion of the leads 52 and 54 is bent to form the proximity portion 54h.

As shown in FIG. 18, the leads 52 and 54 of the fourth embodiment are bent so that the shape when viewed from the side is U-shaped. Here, the lead 54 will be described in detail. The structure and shape of the lead 52 are the same as those of the lead 54.

The lead 54 has a first vertical portion 54j, a first separating portion 54k, a protruding portion 54f, and a second separating portion 54m. The first vertical portion 54j, the first separating portion 54k, the protruding portion 54f, and the second separating portion 54m are connected from the temperature detecting element 51a toward the coated electric wires 53 and 55 in this order. The first vertical portion 54j extends from the temperature detecting element 51a toward the upper side in the vertical direction. The first separation portion 54k and the second separation portion 54m extend along the extension direction Ex. The first separation portion 54k and the second separation portion 54m are arranged in parallel with, for example, the upper surface 46d. One end of the first separation portion 54k is connected to the upper end of the first vertical portion 54j, and the other end is connected to the protruding portion 54f.

The protruding portion 54f has a second vertical portion 54g, a proximity portion 54h, and a third vertical portion 54i. The proximity portion 54h extends along the upper surface 46d. The proximity portion 54h is, for example, parallel to the upper surface 46d. The second vertical portion 54 g and the third vertical portion 54i extend in the vertical direction, respectively. In other words, the second vertical portion 54g and the third vertical portion 54i extend in a direction orthogonal to the upper surface 46d of the bottom wall portion 46a. The second vertical portion 54g connects the end portion of the proximity portion 54h on the temperature detecting element 51a side and the first separation portion 54k. The third vertical portion 54i connects the end portion of the proximity portion 54h opposite to the temperature detection element 51a side and the second separation portion 54m. One end of the second separation portion 54m is connected to the third vertical portion 54i, and the other end is electrically connected to the core wire 55a of the covered electric wire 55. The fusing portion 54a is provided in the second separating portion 54m.

The distance (minimum distance) L7 between the proximity portion 54h and the upper surface 46d is smaller than the distance (minimum distance) between the other portion of the lead 54 and the upper surface 46d. For example, the distance (minimum distance) L8 between the lower end of the first vertical portion 54j and the upper surface 46d is larger than the distance L7 between the proximity portion 54h and the upper surface 46d. The distance L7 is defined in the same manner as the distance L1 of the first embodiment, for example.

The thickness of the holding portion 8 is determined according to the distance L7 between the proximity portion 54h and the upper surface 46d and the distance L8 between the first vertical portion 54j and the upper surface 46d. That is, the thickness of the holding portion 8 between the proximity portion 54h and the accommodating portion 46 is equal to the distance L7, and the thickness of the holding portion 8 between the first vertical portion 54j and the accommodating portion 46 is the distance L8. Is equal to.

When a situation occurs in which the insulation resistance of the holding portion 8 is lowered, the insulation resistance may be lowered between the proximity portion 54h and the upper surface 46d, and the insulation resistance may be lowered between the other portion of the lead 54 and the upper surface 46d. It is more likely that the insulation resistance will decrease. Therefore, the proximity portion 54h can more reliably exert the fuse function of the fusing portion 54a. The reed 52, which is configured in the same manner as the reed 54, can more reliably exert the fuse function of the blown portion 52a. The proximity portion 54h and the proximity portion of the lead 52 having a similar structure are close to the first side wall portion 46b, the second side wall portion 46c, and the third wall portion 43 instead of being close to the bottom wall portion 46a. You may.

[Fifth Embodiment]
A fifth embodiment will be described with reference to FIG. Regarding the fifth embodiment, the components having the same functions as those described in the first to fourth embodiments are designated by the same reference numerals, and duplicate description will be omitted. FIG. 19 is a side view showing a main part of the temperature detection device according to the fifth embodiment. In the fifth embodiment, the difference from each of the above embodiments is that, for example, the wall portion of the accommodating portion 46 functions as a proximity portion.

As shown in FIG. 19, the accommodating portion 46 according to the fifth embodiment has a third side wall portion 46 g. The third side wall portion 46g is a wall portion facing the second side wall portion 46c in the extending direction Ex. The third side wall portion 46g projects upward from the end portion of the bottom wall portion 46a on the side opposite to the second side wall portion 46c side. The third side wall portion 46g forms a space portion 46h filled with the synthetic resin serving as the filling portion 7 together with the other side wall portions and the bottom wall portion 46a of the accommodating portion 46. The height of the third side wall portion 46g is lower than the height of the second side wall portion 46c.

The third side wall portion 46g projects from the upper surface 46d of the bottom wall portion 46a toward the tip portions 522 and 542 of the leads 52 and 54, and functions as a proximity portion. The tip of the third side wall portion 46g faces the tip portion 522,542 in the height direction Z.

The distance (minimum distance) L9 between the upper end of the third side wall portion 46g and the tip portion 522,542 is smaller than the distance (minimum distance) L10 between the upper surface 46d and the leads 52 and 54. The distance L9 is defined in the same manner as the distance L1 of the first embodiment, for example. The thickness of the holding portion 8 is determined according to the distance L9 between the upper end of the third side wall portion 46g and the tip portion 522,542 and the distance L10 between the upper surface 46d and the leads 52 and 54. That is, the thickness of the holding portion 8 between the third side wall portion 46g and the tip portion 522,542 is equal to the distance L9, and the thickness of the holding portion 8 between the upper surface 46d and the leads 52 and 54 is Equal to the distance L10.

When a situation occurs in which the insulation resistance of the holding portion 8 is lowered, the insulation resistance is likely to be lowered between the tip portions 522, 542 of the leads 52 and 54 and the accommodating portion 46. On the other hand, at the base end portions 523 and 543 of the leads 52 and 54, the insulation resistance with the accommodating portion 46 is unlikely to decrease.

In the temperature detection device 1 of the present embodiment, the fusing portions 52a and 54a are provided at positions that do not overlap with the accommodating portion 46 in the extending direction Ex. In other words, in the extending direction Ex, the fusing portions 52a and 54a are arranged outside the range in which the accommodating portion 46 exists. The fusing portions 52a and 54a are provided on the temperature monitoring unit 60a side of the range where the accommodating unit 46 exists. From this as well, the fuse function of the blown portions 52a and 54a is more reliably exhibited.

As described above, the proximity portion of the fifth embodiment is the third side wall portion 46g forming the space portion 46h filled with the synthetic resin in the accommodating portion 46. Since the third side wall portion 46g surrounding the space portion 46h also serves as a proximity portion in this way, the configuration of the accommodating portion 46 is simplified. A notch may be provided at the upper end of the third side wall portion 46g so as to surround the tip portions 522 and 542.

[Variation example of each of the above embodiments]
In each of the above embodiments, the shape of the proximity portion and the like can be changed as appropriate. For example, in the temperature detection device 1 of the first embodiment, the shapes of the leads 52 and 54 including the proximity portions 52b and 54b can be changed as appropriate. For example, in the temperature detection device 1 of the third embodiment, the shape of the bottom wall portion 46a including the proximity portions 46e and 46f can be changed as appropriate.

The fusing portions 52a and 54a may be provided on the core wires 53a and 55a of the coated electric wires 53 and 55 instead of the leads 52 and 54. That is, in the conductor including the leads 52, 54 and the core wires 53a, 55a, the fusing portion may be provided on the temperature detecting element 51a side of the temperature monitoring unit 60a.

In each of the above embodiments, the proximity portion is provided on one of the leads 52, 54 or the accommodating portion 46, but the proximity portion may be provided on both the leads 52, 54 and the accommodating portion 46. As an example thereof, the proximity portions 46e and 46f of the third embodiment may be provided in the accommodating portion 46 so as to project toward the proximity portions 52b and 54b of the first embodiment.

The contents disclosed in each of the above embodiments and modifications can be combined and executed as appropriate.

1 Temperature detection device 2 Bus bar 3 Relay terminal 4 Fitting member 5 Temperature detection part 6 Terminal 7 Filling part 8 Holding part 30 Main body 30a, 30b Wall part 31 First insertion port 32 Second insertion port 33 Spring part 33a Base end part 40 Opening 41 First wall 41a Projection 41b Locked part 42 Second wall 42a Locking part 42b Projection 43 Third wall 44 Fourth wall 44a Locking part 44b Projection 44c Inside regulation part 45th Five wall part 46 Accommodating part 46a Bottom wall part 46b First side wall part 46c Second side wall part 46d Top surface 46e, 46f Proximity part 46g Third side wall part (proximity part)
51 Element part 51a Temperature detection element 51b Glass 52,54 Lead 521,541 Main body 522,542 Tip part 523,543 Base end part 52a, 54a Fusing part 52b, 54b Proximity part 52c, 54c Vertical part 52d, 54d Separation part 52e, 54e Proximity part 54f Protruding part 54g Second vertical part 54h Proximity part 54i Third vertical part 54j First vertical part 54k First separation part 54m Second separation part 53, 55 Covered wire 53a, 55a Core wire 56 Solder 57 Connector 58 Covered part 59 Electric wire 60 Temperature monitoring device 60a Temperature monitoring unit 100 Electric connector box F1 force

Claims (5)

A temperature detection unit having a temperature detection element, a conductor that electrically connects the temperature detection element and the temperature monitoring unit, and a temperature detection unit.
A wall portion fitted to the relay terminal so as to surround the relay terminal connecting the terminal on the power supply side and the terminal on the electric load side, and a wall portion provided at a position opposite to the relay terminal side with respect to the wall portion. , A conductive fitting member having an accommodating portion accommodating the temperature detecting portion, and
An insulating holding portion that is interposed between the accommodating portion and the conductor to hold the conductor, and an insulating holding portion.
With
The conductor has a fusing portion that is configured to be more easily fusing than other parts of the conductor.
At least one of the conductor and the accommodating portion is provided with the thickness of the holding portion between the conductor and the accommodating portion at a position closer to the temperature detection element than the fusing portion of the conductor. A temperature detecting device characterized in that a proximity portion is provided between the conductor and the accommodating portion in the portion so as to be thinner than the thickness of the holding portion. The temperature detecting device according to claim 1, wherein the proximity portion is a portion in which a part of the conductor is brought closer to the accommodating portion than another portion by bending or bending the conductor. The temperature detecting device according to claim 1, wherein the proximity portion is a conductive leg portion protruding from the conductor toward the accommodating portion. The temperature detecting device according to claim 1, wherein the proximity portion is a portion in which a part of the accommodating portion projects toward the conductor. The holding portion is an insulating synthetic resin filled between the accommodating portion and the conductor.
The temperature detecting device according to claim 1, wherein the proximity portion is a wall portion forming a space portion filled with the synthetic resin in the accommodating portion.

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