JP2022061848A - Wiring accessory - Google Patents

Abstract

To provide a wiring accessory that can suppress the temperature rise when a power terminal is energized.SOLUTION: A wiring accessory 1A includes a power supply terminal for connection to an external power supply, a ground terminal 7 for connection of a ground wire, a board 6 on which the power supply terminal is mounted, and a heat dissipation unit 8 that is thermally coupled to the power supply terminal and dissipates the heat of the power supply terminal to the ground terminal 7. The power supply terminal and the ground terminal 7 are insulated from each other.SELECTED DRAWING: Figure 2

Description

The present disclosure generally relates to wiring fixtures. More specifically, the present disclosure relates to wiring appliances having a heat dissipation structure.

The outlet described in Patent Document 1 includes a terminal member to which an external power supply is connected and a connection member to which a plug of a load device is connected. In this outlet, a terminal member and a connecting member are provided in a power supply path for supplying electric power from an external power source to a load device, and the terminal member is exposed from the surface of the main body of the wiring device.

Japanese Unexamined Patent Publication No. 2020-081998

When a poor contact between the power supply terminal provided in the wiring device and the feeding line connected to the power supply terminal or a poor contact between the load terminal provided in the wiring device and the plug of the load device connected to the load terminal occurs, respectively. There was a possibility that heat generation during energization would increase at the connection part of.

An object of the present disclosure is to provide a wiring device capable of suppressing a temperature rise during energization.

The wiring device according to one aspect of the present disclosure includes a power supply terminal, a ground terminal, a substrate, and a heat radiating unit. An external power supply is connected to the power supply terminal. A ground wire is connected to the ground terminal. The power supply terminal is mounted on the board. The heat radiating portion is thermally coupled to the power supply terminal, and the heat of the power supply terminal is radiated to the ground terminal. The power supply terminal and the ground terminal are insulated from each other.

In the present disclosure, it is possible to suppress a temperature rise when energized in a wiring device.

FIG. 1 is a block diagram showing a configuration of a wiring device according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the wiring device of the same as above. FIG. 3 shows an example of using the wiring device of the same as above, and is an external perspective view when the opening / closing portion is in a conductive state. FIG. 4 shows an example of using the wiring device of the same as above, and is an external perspective view when the opening / closing portion is in the shutoff state. FIG. 5 is a front view of the wiring fixture with the outer cover and the inner cover removed. FIG. 6 is a rear view of the wiring fixture with the outer cover and the inner cover removed. FIG. 7 is a schematic view corresponding to the X1-X1 line cross section of FIG. 5 showing the configuration of the main part of the wiring device of the above. FIG. 8 is a schematic view corresponding to the X2-X2 line cross section of FIG. 6 showing the configuration of the main part of the wiring device of the same. FIG. 9 is a schematic view corresponding to the Z1-Z1 line cross section of FIG. 5 showing the configuration of the main part of the wiring device of the same. FIG. 10 is a schematic view corresponding to the Z2-Z2 line cross section of FIG. 5 showing the configuration of the main part of the wiring device of the same. FIG. 11 is a schematic view corresponding to the Z2-Z2 line cross section of FIG. 5 showing the configuration of the main part in the modified example 1 of the wiring device of the above.

The embodiments and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and modifications. Even if it is not the embodiment and the modification, various changes can be made according to the design and the like as long as it does not deviate from the technical idea of the present disclosure.

(1) Outline First, an outline of the wiring device 1A of the present embodiment will be described with reference to FIGS. 1, 2, and 8.

The wiring device 1A according to the present embodiment includes a power supply terminal 4, a ground terminal 7, a substrate 6, and a heat dissipation unit 8. The power supply terminal 4 is a member that is electrically connected to the external power supply 5 via a feeding line 51. For example, the ground wire 78 of the external power supply 5 is connected to the ground terminal 7. The power supply terminal 4 is mounted on the board 6. The substrate 6 is a member having a base material such as paper or glass impregnated with a resin, having insulating properties and having thermal conductivity. The heat radiating unit 8 is thermally coupled to the power supply terminal 4 via the substrate 6. Further, the heat radiating portion 8 is also thermally coupled to the ground terminal 7. As a result, the heat radiating unit 8 can dissipate the heat of the power supply terminal 4 generated when the power is turned on to the ground terminal 7. Further, the power supply terminal 4 and the ground terminal 7 are electrically insulated from each other.

Further, in the present embodiment, the wiring device 1A includes a temperature detection unit 9, a detection unit 101, and a control unit 102. The temperature detection unit 9 detects the temperature corresponding to at least one of the power supply terminal 4, the load terminal 3, and the power supply path L1. The detection unit 101 detects whether or not the wiring device 1A is abnormal based on the temperature detected by the temperature detection unit 9. When the detection unit 101 detects an abnormality in the wiring device 1A, the control unit 102 shuts off the power supply path L1 and notifies at least one of the temperature. Here, the detection unit 101 and the control unit 102 constitute the processing unit 10. The load terminal 3 is a member that electrically connects the load device 2 to the wiring device 1A. Further, the "temperature corresponding to at least one of the power supply terminal 4, the load terminal 3, and the power supply path L1" may be the temperature of at least one of the power supply terminal 4, the load terminal 3, and the power supply path L1, and may be heat. It may be the temperature of a heat medium (a heat-bonded portion including an air layer) that transfers heat to and from at least one of a power supply terminal 4, a load terminal 3, and a power supply path L1 by conduction.

By the way, according to the configuration of the wiring fixture 1A of the present embodiment including the heat radiating unit 8 that thermally couples the ground terminal 7 and the power supply terminal 4, the heat generated in the power supply terminal 4 when the wiring fixture 1A is energized is transferred to the substrate. Heat can be dissipated to the ground terminal 7 via the 6 and the heat radiating unit 8. As a result, for example, even if the contact resistance between the power supply terminal 4 and the feeder line 51 increases and heat generation increases, the temperature rise of the power supply terminal 4 can be suppressed, thereby suppressing the temperature rise of the wiring appliance 1A. can do.

(2) Details The wiring device 1A according to the present embodiment will be described in more detail with reference to FIGS. 1 to 10.

(2.1) Overall Configuration In the present embodiment, a case where the wiring device 1A is an outlet will be described as an example. The outlet 1 supplies electric power supplied from an external power source to the load appliance 2 connected to the load terminal 3 through a power supply path L1 that electrically connects between the power supply terminal 4 and the load terminal 3. The wiring device 1A (outlet 1) is installed in, for example, a residential facility such as a detached house or an apartment house, or a non-residential facility such as an office, a store, a school, or a nursing facility. The wiring fixture 1A is installed, for example, on a construction surface 11 (see FIG. 3) such as a wall surface, a ceiling surface, and a floor surface of a facility (building). The wiring fixture 1A is not limited to the one installed on the construction surface 11, and may be attached to furniture such as a desk, or may be used while being placed on a mounting surface (for example, a floor surface). good.

As described above, the wiring device 1A includes a power supply terminal 4 for connecting to the external power supply 5, a ground terminal 7 for connecting the ground wire 78, and a board 6 on which the power supply terminal 4 is mounted. Further, the wiring device 1A is thermally coupled to the power supply terminal 4 and includes a heat radiating unit 8 for radiating the heat of the power supply terminal 4 to the ground terminal 7. Here, the power supply terminal 4 and the ground terminal 7 are electrically insulated from each other.

Further, in the present embodiment, as shown in FIG. 1, the wiring device 1A opens and closes to shut off the power supply path L1 in addition to the temperature detection unit 9 and the processing unit 10 (detection unit 101 and control unit 102). A unit 12 is provided. Further, the wiring device 1A includes an operation member 13 mechanically coupled to the opening / closing unit 12, an output unit M1 for outputting a notification from the control unit 102, and a switch 16 for issuing a command to the control unit 102. Be prepared. The output unit M1 has, for example, a display unit 14 that notifies the notification from the control unit 102 by light emission, and a buzzer 15 that notifies the notification by voice.

3 and 4 are perspective views showing a state in which the wiring device 1A is attached to the construction surface 11. In the present embodiment, the wiring fixture 1A is an embedded wiring fixture attached to the mounting frame of the large-angle continuous wiring fixture standardized by the Japanese Industrial Standards. Specifically, the wiring device 1A is attached to the construction surface 11 via the mounting frame. Here, the mounting frame is fixed to the construction surface 11 via or directly to the embedded box. That is, by fixing the mounting frame to the construction surface 11, the wiring fixture 1A is attached to the construction surface 11 via the mounting frame. A decorative plate 111 is attached to the mounting frame, and as shown in FIGS. 3 and 4, the front surface 1C of the wiring device 1A is exposed from the opening window 112 on the front surface of the decorative plate 111. Here, the mounting frame may be a separate member from the wiring fixture 1A, or may be a single member. In the present embodiment, the case where the wiring fixture 1A is for indoor use, that is, the case where the construction surface 11 is the inner wall surface of the building (facility) will be described, but the present invention is not limited to this example, and the wiring fixture 1A is for outdoor use. May be good.

In the following, the direction perpendicular to the horizontal plane is defined as the "vertical direction" when the wiring fixture 1A is attached to the inner wall surface of the building which is the construction surface 11, and the wiring fixture 1A is viewed downward (vertically) when viewed from the front. ) Is described as "downward". Further, the direction orthogonal to the vertical direction and parallel to the construction surface 11 is referred to as "left-right direction", and the right side of the wiring fixture 1A as viewed from the front is referred to as "right side" and the left side is referred to as "left side". Further, a direction orthogonal to both the vertical direction and the horizontal direction, that is, a direction orthogonal to the construction surface 11 will be referred to as a "front-back direction", and the back side (wall back side) of the construction surface 11 will be described as "rear". However, these directions do not mean to limit the direction in which the wiring device 1A is used. For example, when the wiring device 1A is mounted on the floor surface instead of the wall surface, the "front-back direction" is the direction perpendicular to the horizontal plane, and the above-mentioned "vertical direction" and "horizontal direction" are the directions parallel to the horizontal plane. Become. Further, even when the wiring device 1A is mounted on the wall surface, the wiring device 1A may be mounted on the wall surface in a direction in which the above-mentioned "vertical direction" is parallel to the horizontal plane (that is, sideways). In this case, the above-mentioned The "left-right direction" of is the direction perpendicular to the horizontal plane. It should be noted that the term "vertical" in the present disclosure includes not only perfect verticality but also substantial verticality within a certain error range. Further, "parallel" in the present disclosure includes not only perfect parallelism but also substantially parallelism within a certain error range.

In the present embodiment, as the wiring device 1A, a one-port type outlet 1 to which one plug 21 (see FIG. 7) can be connected is illustrated. That is, the wiring device 1A has one connection port 17 so as to correspond to the plug blade 211 of one plug 21. One connection port 17 is arranged on the front surface 1C of the wiring device 1A. In the present embodiment, the plug 21 is a plug with a two-pole ground provided with two plug blades 211 and one ground pin 212, and the connection port 17 has two plug blade insertion holes 171 and one ground pin insertion hole. Has 172.

In the present embodiment, the wiring device 1A includes a pair of power supply terminals 4 having different polarities from each other and a ground terminal 7 so as to correspond to the plug 21 which is a plug with a two-pole ground. That is, the feeder line 51 on the L pole (Live) side from the external power supply 5 is connected to one of the power supply terminals 4 of the pair of power supply terminals 4, and the N pole (N pole) from the external power supply 5 is connected to the other power supply terminal 4. The feeder line 51 on the Neutral) side is connected. A ground wire 78 is connected to the ground terminal 7. Further, the wiring device 1A includes a pair of load terminals 3 having different polarities from each other and a ground pin terminal 19. Further, the load terminal 3 and the power supply terminal 4 having the same polarity are electrically connected to each other by the feeding path L1 via the opening / closing portion 12. The ground terminal 7 and the ground pin terminal 19 are electrically connected to each other via an internal conductive member 77.

As shown in FIGS. 2 and 8, the wiring device 1A includes internal parts such as a power supply terminal 4 and a load terminal 3, an outer body 181 and an outer cover 182, an inner cover 183, an inner block 184, and a terminal block. It has 185 and. Here, the outer body 181 and the outer cover 182, the inner cover 183, the inner block 184, and the terminal block 185 are made of an insulating material such as synthetic resin.

The outer body 181 is formed in a box shape with an open front surface. The opening surface (front surface) of the outer body 181 has a rectangular shape in which the vertical dimension is longer than the horizontal dimension. The inner block 184 is housed in the outer body 181 together with other internal parts (power supply terminal 4, opening / closing portion 12, etc.) while holding the load terminal 3 and the ground pin terminal 19. An inner cover 183 is attached to the front surface of the outer body 181. As a result, between the outer body 181 and the inner cover 183, internal parts including the load terminal 3 and the ground pin terminal 19 held by the inner block 184 are accommodated. The outer cover 182 is attached to the front surface of the inner cover 183. As a result, the load terminal 3 and the ground pin terminal 19 are accommodated between the inner block 184 and the outer cover 182. Here, in the portion of the inner cover 183 corresponding to the inner block 184, an opening window 183A penetrating in the front-rear direction is formed. Therefore, the front surface of the inner block 184 holding the load terminal 3 and the ground pin terminal 19 is covered with the outer cover 182, and when the outer cover 182 is removed, the front surface of the inner block 184 is exposed forward through the opening window 183A. do. The terminal block 185 is housed in the outer body 181 together with other internal components while holding the power supply terminal 4 and the ground terminal 7.

Further, in the present embodiment, the outer cover 182 is configured to be separable into a plurality of members (for example, three members of the first portion 182A, the second portion 182B, and the ground lid 182C).

The above-mentioned one connection port 17 is formed in the first portion 182A of the outer cover 182 that covers the inner block 184. The connection port 17 has a pair of plug blade insertion holes 171 and a ground pin insertion hole 172 into which the ground pin 212 of a plug with a ground electrode is inserted, and a ground lid 182C is provided below the ground pin insertion hole 172. Inside the wiring device 1A, the load terminal 3 is arranged at a position corresponding to each of the pair of plug blade insertion holes 171 and the earth pin terminal 19 is arranged at a position corresponding to the earth pin insertion hole 172, corresponding to the earth lid 182C. A ground terminal 7 is arranged at the position. Here, the ground pin terminal 19 and the ground terminal 7 are electrically connected. The earth pin terminal 19 is a spring member to which the ground pin 212 of the plug with a ground electrode is connected. The ground terminal 7 includes a first ground terminal 71 to which the ground wire 78 of the load device 2 is connected on the side facing the ground lid 182C, and the ground wire 78 of the external power supply is connected to the opposite side of the first ground terminal 71. A second ground terminal 72 is provided.

Further, in the space between the outer body 181 and the inner cover 183, the opening / closing portion 12, the substrate 20, and the like are housed on the left side of the inner block 184. The substrate 20 is arranged above the opening / closing portion 12. A first indicator lamp 141 and a second indicator lamp 142, and a switch 16 constituting the display unit 14 are mounted on the substrate 20. As an example, the first indicator lamp 141 and the second indicator lamp 142 are LEDs (Light Emitting Diodes) having different emission colors from each other, and the switch 16 is a push button switch. Further, the inner cover 183 has a translucent portion 183C and a cantilever 183D so that the light of the display unit 14 can be visually recognized from the front of the wiring fixture 1A and the switch 16 can be pressed from the front of the wiring fixture 1A. It is formed. That is, the light of the display unit 14 can be visually recognized from the front of the wiring fixture 1A through the translucent portion 183C, and the switch 16 can be pushed and operated from the front of the wiring fixture 1A via the cantilever 183D. In FIGS. 3 and 4, for convenience, the display unit 14 and the switch 16 are located at positions corresponding to the display unit 14 (first indicator lamp 141 and the second indicator lamp 142) and the switch 16 on the front surface 1C of the wiring fixture 1A. It is coded.

(2.2) Load Terminal and Power Supply Terminal In the present embodiment, the pair (two) load terminals 3 included in the wiring device 1A are held in the inner block 184 as shown in FIGS. 5 and 7. Further, the ground pin terminal 19 is also held in the inner block 184. Here, the pair of load terminals 3 are arranged at positions corresponding to the pair of plug blade insertion holes 171 formed in the outer cover 182. The earth pin terminal 19 is arranged at a position corresponding to the ground pin insertion hole 172 formed in the outer cover 182.

The load terminal 3 is a blade receiving member into which the plug blade 211 of the plug 21 is inserted when the plug 21 is connected. Further, the ground pin terminal 19 is a spring member into which the ground pin 212 of the plug 21 is inserted. The load terminal 3 and the ground pin terminal 19 are made of a metal having conductivity and elasticity, for example, copper or a copper alloy. The load terminal 3 is electrically connected to the plug blade 211 and mechanically holds the plug blade 211. The earth pin terminal 19 is electrically connected to the ground pin 212 and mechanically holds the ground pin 212.

The pair of power supply terminals 4 are held in the terminal block 185 as shown in FIGS. 6 and 8. Further, the ground terminal 7 is also held in the terminal block 185. Here, the pair of power supply terminals 4 are arranged at positions corresponding to the pair of power supply terminal holes 185A formed on the rear surface of the terminal block 185. The ground terminal 7 is integrally formed with the ground pin terminal 19. The ground terminal 7 is arranged at a position corresponding to the ground terminal hole 185B formed on the rear surface of the terminal block 185. Each power supply terminal 4 is a plug-in type quick connection terminal to which the power supply line 51 is connected by inserting the core wire 52 of the power supply line 51. Specifically, each power supply terminal 4 has a terminal plate 41 and a lock spring 42, as shown in FIG. The terminal board 41 is made of a conductive metal, for example, copper or a copper alloy. The lock spring 42 is made of an elastic metal such as stainless steel. Each power supply terminal 4 is exposed from the corresponding power supply terminal hole 185A in the pair of power supply terminal holes 185A. In each power supply terminal 4, when the power supply line 51 is inserted into the corresponding power supply terminal hole 185A, the power supply line is sandwiched between the terminal plate 41 and the lock spring 42 with the core wire 52 of the power supply line 51. It is electrically connected to the 51 and mechanically holds the feeder line 51. Further, each power supply terminal 4 is mounted on one surface (for example, the rear surface 62) of the substrate 6 on the front side of the wiring device 1A of the terminal board 41. Here, each power supply terminal 4 and the substrate 6 are thermally coupled.

As shown in FIGS. 5 and 9, the ground terminal 7 has a first ground terminal 71 to which the ground wire 78 of the load device 2 is connected and a second ground terminal 72 to which the ground wire 78 of the external power supply 5 is connected. Be prepared. The first ground terminal 71 and the second ground terminal 72 include a common pedestal member 73. The first ground terminal 71 includes a holding member 74 and a screw 75 for fixing the ground wire 78 of the load device 2 to the pedestal member 73, and the second ground terminal 72 includes a lock spring 76 held by the pedestal member 73. .. The pedestal member 73 is made of a conductive metal, for example, copper or a copper alloy. The lock spring 76 is made of an elastic metal such as stainless steel. The second ground terminal 72 is a plug-in type quick-connect terminal similar to the power supply terminal 4, and is arranged at a position corresponding to the ground terminal hole 185B formed on the rear surface of the terminal block 185. Here, the first ground terminal 71, the second ground terminal 72, and the ground pin terminal 19 are electrically connected. Here, the pedestal member 73 may be provided as a separate member at the first ground terminal 71 and the second ground terminal 72.

(2.3) Heat dissipation structure The heat dissipation structure of the power supply terminal 4 will be described with reference to FIGS. 5 and 10.

In the present embodiment, the heat radiating portion 8 for radiating the heat generated in the power supply terminal 4 when the wiring device 1 is energized to the ground terminal 7 includes the metal layer 81 provided on the substrate 6. The metal layer 81 is a conductive metal film formed on one surface (front surface 61) opposite to one surface (rear surface 62) on which the power supply terminal 4 is mounted on the substrate 6. Further, the heat radiating portion 8 further includes a contact metal portion 83. The contact metal portion 83 is a thin plate-shaped metal member provided in a state of being thermally coupled to the ground terminal 7 and in contact with the metal layer 81. That is, the heat radiating unit 8 is in contact with the substrate 6.

Here, the front surface 61 of the substrate 6 is in contact with the metal layer 81, and the metal layer 81 and the substrate 6 are thermally coupled. Further, the power supply terminal 4 and the substrate 6 are thermally coupled. Therefore, the power supply terminal 4 and the metal layer 81 are thermally coupled to each other via the substrate 6. Further, the contact metal portion 83 is in contact with the metal layer 81, and the contact metal portion 83 is thermally bonded to the metal layer 81. Further, since the contact metal portion 83 and the ground terminal 7 are one continuous member in the present embodiment, the contact metal portion 83 is thermally coupled to the ground terminal 7. Therefore, the heat of the power supply terminal 4 generated during energization is transmitted to the heat radiating portion 8 including the metal layer 81 and the contact metal portion 83 via the substrate 6, and is radiated to the ground terminal 7. For example, if the electrical resistance increases due to poor contact between the power supply terminal 4 and the feeder line 51, the Joule heat generated during energization increases and the amount of heat generated increases, but the ground terminal 7 and the ground wire 78 pass through the heat dissipation unit 8. By dissipating heat to the ground, the temperature rise of the outlet 1 can be reduced. In this way, the power supply terminal 4 and the ground terminal 7 are thermally coupled to each other via the substrate 6 and the heat radiating portion 8. On the other hand, a potential difference occurs between the power supply terminal 4 and the ground terminal 7 when the wiring device 1A is energized, and there is a risk of electric leakage. Because it is electrically insulated by, the possibility of electric leakage is reduced. Further, in the wiring device 1A, the electric circuit formed on the substrate 6 and the heat radiating portion 8 are preferably arranged with an insulation distance of 2 mm or more in order to suppress the occurrence of electric leakage, and are preferably 3 mm or more. Is more preferable.

(2.4) Detection system In the present embodiment, the temperature detection unit 9, the processing unit 10 (detection unit 101 and control unit 102), and the opening / closing unit 12 constitute the detection system S1 (see FIG. 1). Hereinafter, the detection system S1 will be described in detail.

(2.4.1) Temperature Detection Unit First, the temperature detection unit 9 of the detection system S1 will be described with reference to FIGS. 1, 2, 5, and 8.

In the present embodiment, the temperature detection unit 9 detects the temperature corresponding to the power supply terminal 4 and the temperature corresponding to the load terminal 3, respectively. The temperature detection unit 9 is not limited to the one that detects the temperature corresponding to the power supply terminal 4 and the temperature corresponding to the load terminal 3, and at least one of the power supply terminal 4, the load terminal 3, and the power supply path L1. It suffices to detect the corresponding temperature.

In the present embodiment, the temperature detection unit 9 includes a power supply terminal temperature detection unit 91 (hereinafter referred to as a first temperature detection unit) that detects the temperature corresponding to the power supply terminal 4, and a load that detects the temperature corresponding to the load terminal 3. A terminal temperature detection unit 92 (hereinafter referred to as a second temperature detection unit) is provided. The first temperature detection unit 91 includes a first temperature sensor 93, and the second temperature detection unit 92 includes a second temperature sensor 94. The first temperature sensor 93 is thermally coupled to the power supply terminal 4. The second temperature sensor 94 is thermally coupled to the load terminal 3. The first temperature sensor 93 and the second temperature sensor 94 are realized by, for example, a thermistor, a thermocouple, a thermopile, or the like.

In the present embodiment, the first temperature sensor 93 of the first temperature detection unit 91 is mounted on the rear surface 62 of the substrate 6 as shown in FIG. That is, the temperature detection unit 9 includes the temperature sensor 97 (first temperature sensor 93) mounted on the substrate 6. Here, a heat transfer member 95 having thermal conductivity and insulating properties is arranged between the terminal plate 41 of the power supply terminal 4 also mounted on the rear surface 62 of the substrate 6 and the first temperature sensor 93. As a result, the first temperature sensor 93 and the power supply terminal 4 are thermally more strongly coupled. The heat transfer member 95 is not an essential configuration for the outlet 1, and can be omitted as appropriate. Here, a pair of first temperature sensors 93 are provided corresponding to a pair of power supply terminals 4 having different polarities from each other. Each first temperature sensor 93 detects the temperature corresponding to the corresponding power supply terminal 4 via the heat transfer member 95.

The load terminal 3 has a holding portion 96 having a C-shaped side view, and the holding portion 96 fixes the block-shaped second temperature sensor 94 in a held state. As a result, thermal coupling between the second temperature sensor 94 and the load terminal 3 is realized. Here, a pair of second temperature sensors 94 are provided corresponding to a pair of load terminals 3 having different polarities from each other. Each second temperature sensor 94 detects the temperature corresponding to the corresponding load terminal 3.

The temperature detection unit 9 outputs a detection signal corresponding to the detected temperature to the detection unit 101. The detection signal may be an electric signal that conveys information according to temperature, and is, for example, a signal such as a resistance value, a voltage value, or a current value that changes according to temperature.

(2.4.2) Processing Unit Next, the processing unit 10 (detection unit 101 and control unit 102) of the detection system S1 will be described with reference to FIG.

The processing unit 10 (detection unit 101 and control unit 102) is mounted on, for example, a control board 23 arranged behind the inner block 184. Further, a buzzer 15 that outputs a notification from the control unit 102 is also mounted on the control board 23, for example. The control unit 102 is electrically connected to the opening / closing unit 12, the output unit M1 (display unit 14, buzzer 15), the switch 16, and the temperature detection unit 9, and the control unit 102 is at least the opening / closing unit 12 and the output unit. It controls M1 (display unit 14 and buzzer 15).

The processing unit 10 (detection unit 101 and control unit 102) has, for example, a computer system having a processor and a memory. Then, the processor executes the program stored in the memory, so that the computer system functions as the processing unit 10. The program executed by the processor is recorded in advance in the memory of the computer system here, but may be recorded in a recording medium such as a memory card and provided, or may be provided through a telecommunication line such as the Internet. ..

The detection unit 101 determines whether or not the state of the wiring device 1A is abnormal by determining whether or not the temperature detected by the temperature detection unit 9 exceeds a predetermined threshold value based on the temperature detected by the temperature detection unit 9. It is configured to detect. The control unit 102 causes at least one of the cutoff of the power supply path L1 (hereinafter, simply referred to as a cutoff) and the notification regarding the temperature (hereinafter, simply referred to as a notification) according to the detection result of the abnormality by the detection unit 101. It is configured in.

Hereinafter, the specific operation of the processing unit 10 will be described.

In the present embodiment, AC power is input from the external power source 5 to the power supply terminal 4 of the wiring device 1A, and for example, the power supply circuit 22 mounted on the control board 23 causes the processing unit 10 (detection unit 101 and control unit 102) to receive AC power. The required operating power is supplied.

When the detection unit 101 detects that the wiring device 1A is at an abnormal temperature based on the detection signal from the temperature detection unit 9, the detection unit 101 outputs an abnormality detection signal to the control unit 102. The control unit 102 outputs a drive signal to the opening / closing unit 12 based on the abnormality detection signal from the detection unit 101, and controls the opening / closing unit 12 to switch from the conduction state to the cutoff state. In the present embodiment, the wiring device 1A includes a pair of power supply terminals 4 having different polarities from each other and a pair of load terminals 3 having different polarities from each other. The power supply terminal 4 and the load terminal 3 having the same polarity are electrically connected via the opening / closing portion 12 by the feeding path L1 corresponding to each polarity. Here, the opening / closing unit 12 is connected between the contact device connected between the power supply terminal 4 of the L pole and the load terminal 3 of the L pole, and between the power supply terminal 4 of the N pole and the load terminal 3 of the N pole. It has a contact device to be used. The pair of contact devices included in the opening / closing unit 12 are simultaneously controlled by the control unit 102 into a conduction state or a cutoff state. Therefore, if the pair of contact devices included in the opening / closing unit 12 are in the cutoff state, both of the feeding paths L1 corresponding to the respective polarities are electrically disconnected.

Further, the control unit 102 notifies the detection result of the detection unit 101. That is, the control unit 102 notifies the user that an abnormal temperature has been detected through the output unit M1 (display unit 14 and buzzer 15). That is, in the present embodiment, the notification in the control unit 102 is realized by the light emission of the display unit 14 and the output of the notification sound from the buzzer 15.

The switch 16 is operated when the output of the notification sound of the buzzer 15 is stopped. That is, when the switch 16 is pressed while the buzzer 15 is outputting the notification sound, the control unit 102 controls the buzzer 15 so as to stop the notification sound of the buzzer 15. The switch 16 is also used as a test switch, and is also used when the contact of the opening / closing unit 12 is forcibly switched from the conduction state to the cutoff state.

Specifically, the opening / closing unit 12 has a pair of contact devices having different polarities from each other and an electromagnetic release device. Each of the pair of contact devices has a fixed contact and a movable contact. The movable contact moves between a closed position in contact with the fixed contact and an open position away from the fixed contact. The power supply terminal 4 is electrically connected to the fixed contact, and the load terminal 3 is electrically connected to the movable contact.

The opening / closing portion 12 having such a configuration is in a conductive state in which the movable contact is located at the closed position in the steady state to conduct conduction between the power supply terminal 4 and the load terminal 3. On the other hand, when the control unit 102 detects that the state of the wiring device 1A is abnormal based on the temperature detected by the temperature detection unit 9, and the control unit 102 transmits a drive signal to the opening / closing unit 12, the opening / closing unit 12 causes the opening / closing unit 12. , Operate the electromagnetic release device to drive the movable contactor and move the movable contact to the open position. As a result, the state is switched to a cutoff state in which the power supply terminal 4 and the load terminal 3 are electrically cut off. In this way, the opening / closing unit 12 switches from the conduction state to the cutoff state by the drive signal from the control unit 102.

An operating member 13 is mechanically coupled to the opening / closing portion 12. The operating member 13 is a lever-type handle that can rotate about a rotation axis. Here, the inner cover 183 and the outer cover 182 are formed with a first operation hole 183B and a second operation hole 182D, respectively, so that the operation member 13 can be operated from the front of the wiring device 1A. That is, the operation member 13 is exposed in front of the wiring instrument 1A through the first operation hole 183B and the second operation hole 182D, and can be operated from the front of the wiring instrument 1A.

The operation member 13 is displaced with respect to the wiring device 1A in response to the interruption of the power supply path L1. Specifically, the operating member 13 rotates in conjunction with the opening / closing portion 12 and moves between the on position (see FIG. 3) and the off position (see FIG. 4). The on position is a position corresponding to the conduction state of the pair of contact devices included in the opening / closing unit 12, and the off position is a position corresponding to the cutoff state of the pair of contact devices included in the opening / closing unit 12. That is, if the pair of contact devices included in the opening / closing unit 12 are in a conductive state, the operating member 13 is located at the on position as shown in FIG. When the pair of contact devices included in the operating member 13 is in the on position, the front surface of the operating member 13 is substantially flush with the front surface 1C of the wiring device 1A. On the other hand, when the pair of contact devices included in the opening / closing unit 12 is switched from the conduction state to the cutoff state, the operation member 13 rotates and the tip end portion of the operation member 13 moves forward (front side), as shown in FIG. , The operating member 13 moves to the off position. When the operating member 13 is in the off position, the operating member 13 projects forward from the front surface 1C of the wiring device 1A. When the operating member 13 is moved from the off position to the on position, the pair of contact devices included in the opening / closing unit 12 can be switched from the cutoff state to the conduction state.

In this way, when the detection unit 101 detects an abnormality in temperature, the opening / closing unit 12 is switched to the shutoff state by the control of the control unit 102, so that the heating of the wiring device 1A can be suppressed. Further, after resolving the cause of the temperature abnormality, the operating member 13 is moved from the off position to the on position to switch to the conduction state, so that the power supply to the load device 2 can be restarted.

(3) Modification Example The wiring fixture 1A according to the modification of the above embodiment is listed below. Each configuration of the modification described below can be applied in combination with each configuration described in the above embodiment as appropriate.

(3.1) Modification Example In the wiring appliance 1A of the above embodiment, the heat radiating portion 8 is a member continuous with the metal layer 81 provided on the front surface 61 of the substrate 6 and the ground terminal 7 in contact with the metal layer 81. It is provided with a contact metal portion 83 which is. As a result, the heat of the power supply terminal 4 mounted on the rear surface 62 opposite to the front surface 61 of the substrate 6 is dissipated to the ground terminal 7 via the substrate 6 and the heat dissipation unit 8, but heat dissipation is realized by another method. May be done.

For example, the wiring fixture 1A of the modified example differs from the above embodiment in that the heat radiating portion 8 includes the leaf spring portion 82 in which the heat radiating portion 8 elastically contacts the substrate 6, as shown in FIG. Since the parts other than the heat radiating unit 8 are common to the wiring device 1A of the above embodiment, the common components are designated by the same reference numerals and the description thereof will be omitted.

In this modification, the leaf spring portion 82, which is a continuous part of the heat radiating portion 8, is in direct elastic contact with the front surface 61 of the substrate 6, so that the heat radiating portion 8 and the substrate 6 are thermally coupled. As a result, the heat of the power supply terminal 4 generated when the wiring device 1A is energized is dissipated to the ground terminal 7 via the substrate 6 and the heat radiating portion 8 provided with the leaf spring portion 82. Further, the heat radiating unit 8 and the ground terminal 7 are, for example, one continuous member.

In this modification, the leaf spring portion 82, which is a continuous part of the heat dissipation portion 8, is deformed by coming into contact with the front surface 61 of the substrate 6. The leaf spring portion 82 is made of metal, for example, and the elasticity of the metal exerts a restoring force in a direction of suppressing the deformation of the leaf spring portion 82, and the restoring force causes the leaf spring portion 82 and the front surface 61 of the substrate 6 to elastically contact each other. The state is retained. As a result, the heat radiation unit 8 and the substrate 6 are thermally coupled, and the heat of the power supply terminal 4 is dissipated to the ground terminal 7 via the substrate 6 and the heat radiation unit 8. In this modification, the front surface 61 of the substrate 6 and the leaf spring portion 82, which is a continuous part of the heat radiating portion 8, are in direct contact with each other, but between the front surface 61 of the substrate 6 and the leaf spring portion 82, For example, a metal layer such as a copper foil may be provided.

As a further modification of this modification, the heat radiating portion 8 may include a metal plate portion arranged in parallel with the substrate 6 as a continuous member, and the metal plate portion and the substrate 6 may be in direct contact with each other.

(3.2) Other Modification Examples The other modifications of the embodiment are listed below. The following modifications may be realized by combining them as appropriate.

The wiring device 1A may be, for example, a table tap, a hook ceiling, a switch device, a relay device, a breaker, or the like, in addition to the outlet 1, as long as it can take out electric power from a power source such as a commercial power source.

The wiring device 1A may include a pair of load terminals 3 having different polarities from each other, and a plurality of connection ports 17 to which the plug 21 of the load device 2 is connected.

The outer cover 182 of the wiring device 1A may be a single member.

The heat radiating unit 8 and the ground terminal 7 may be formed of a separate member as long as they are thermally coupled, or may be interposed between the heat radiating unit 8 and the ground terminal 7 with a separate member such as solder. good.

(4) Summary As described above, in the wiring device (1A) of the first aspect, the power supply terminal (4), the ground terminal (7), the substrate (6), and the heat dissipation unit (8) are provided. Be prepared. An external power supply (5) is connected to the power supply terminal (4). A ground wire (78) is connected to the ground terminal (7). Further, the power supply terminal (4) is mounted on the board (6). The heat radiating unit (8) is thermally coupled to the power supply terminal (4), and the heat of the power supply terminal (4) is radiated to the ground terminal (7). The power supply terminal (4) and the ground terminal (7) are insulated from each other.

According to the first aspect, since the heat generated at the power supply terminal (4) can be dissipated when the wiring device (1A) is energized, the temperature rise at the time of energization is suppressed in the wiring device (1A). Can be done.

In the wiring device (1A) of the second aspect, in the first aspect, the heat radiating portion (8) and the ground terminal (7) are continuous members.

According to the second aspect, heat can be efficiently transferred between the heat radiating portion (8) and the ground terminal (7).

In the wiring device (1A) of the third aspect, in the first or second aspect, the heat radiating portion (8) comes into contact with the substrate (6).

According to the third aspect, heat can be efficiently transferred between the heat radiating unit (8) and the substrate (6).

In the wiring device (1A) of the fourth aspect, in any one of the first to third aspects, the heat radiating portion (8) includes the metal layer (81) provided on the substrate (6).

According to the fourth aspect, the substrate (6) and the heat radiating portion (8) can be thermally coupled, and the surface area of the heat radiating portion (8) can be increased.

In the wiring device (1A) of the fifth aspect, in any one of the first to third aspects, the heat radiating portion (8) includes a leaf spring portion (82) that makes elastic contact with the substrate (6).

According to the fifth aspect, the substrate (6) and the heat radiating portion (8) can be thermally coupled.

In the wiring device (1A) of the sixth aspect, in any one of the first to fifth aspects, the insulation distance between the electric circuit of the circuit formed on the substrate (6) and the heat radiating portion (8) is set. It is 2 mm or more.

According to the sixth aspect, it is possible to suppress the occurrence of a short circuit between the electric circuit of the circuit formed on the substrate (6) and the heat radiating portion (8).

The wiring device (1A) of the seventh aspect includes a load terminal (3) and a power supply path (L1) in any one of the first to sixth aspects. A load device (2) is connected to the load terminal (3). The power supply path (L1) connects between the power supply terminal (4) and the load terminal (3).

According to the seventh aspect, electric power can be supplied from the external power source (5) to the load device (2) electrically connected to the wiring device (1A).

The wiring device (1A) of the eighth aspect includes a temperature detection unit (9), a detection unit (101), and a control unit (102) in the seventh aspect. The temperature detection unit (9) detects the temperature corresponding to at least one of the power supply terminal (4), the load terminal (3), and the power supply path (L1). The detection unit (101) detects whether or not the wiring device (1A) is abnormal based on the temperature detected by the temperature detection unit (9). When the detection unit (101) detects an abnormality in the wiring device (1A), the control unit (102) shuts off the power supply path (L1) and notifies at least one of the temperature.

According to the eighth aspect, it is possible to suppress an abnormal temperature rise of at least one of the power supply terminal (4), the load terminal (3) and the power supply path (L1).

In the wiring device (1A) of the ninth aspect, in the eighth aspect, the temperature detection unit (9) includes the temperature sensor (97) mounted on the substrate (6).

According to the ninth aspect, the temperature of at least one of the power supply terminal (4), the load terminal (3) and the power supply path (L1) can be detected with high accuracy.

The second to ninth aspects are not essential configurations for the wiring device (1A) and can be omitted as appropriate.

1A Wiring equipment 2 Load equipment 3 Load terminal 4 Power terminal 5 External power supply 6 Board 7 Ground terminal 78 Ground wire 8 Heat dissipation part 81 Metal layer 82 Leaf spring part 9 Temperature detection part 97 Temperature sensor 101 Detection part 102 Control part L1 Power supply path

Claims (9)

A power supply terminal for connecting to an external power supply,
The ground terminal for connecting the ground wire and
The board on which the power supply terminal is mounted and
A heat radiating unit that is thermally coupled to the power supply terminal and dissipates heat from the power supply terminal to the ground terminal is provided.
Insulation between the power supply terminal and the ground terminal,
Wiring equipment. The heat radiating portion and the ground terminal are continuous members.
The wiring device according to claim 1. The heat radiating portion comes into contact with the substrate.
The wiring device according to claim 1 or 2. The heat radiating portion includes a metal layer provided on the substrate.
The wiring device according to any one of claims 1 to 3. The heat radiating portion includes a leaf spring portion that makes elastic contact with the substrate.
The wiring device according to any one of claims 1 to 3. The electric circuit of the circuit formed on the substrate and
The insulation distance between the heat radiating portion and the heat radiating portion is 2 mm or more.
The wiring device according to any one of claims 1 to 5. The load terminal to which the load device is connected and
A power supply path connecting between the power supply terminal and the load terminal is provided.
The wiring device according to any one of claims 1 to 6. A temperature detection unit that detects the temperature corresponding to at least one of the power supply terminal, the load terminal, and the power supply path.
Based on the temperature detected by the temperature detection unit, a detection unit that detects whether or not the wiring device is abnormal, and a detection unit.
When the detection unit detects an abnormality in the wiring device, the detection unit includes a control unit that shuts off the power supply path and notifies at least one of the temperature notifications.
The wiring device according to claim 7. The temperature detector includes a temperature sensor mounted on the substrate.
The wiring device according to claim 8.

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