JP2011070856A - Direct current outlet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a DC outlet capable of readily connecting a wire-supplying DC power and a blade rest member, with a structure for restraining reverse plug-in and through restraint of turning into a large-size. <P>SOLUTION: The outlet 1 is provided with a plug-in connection part 21 for a plug to be connected to, and the plug-in connection part 21 has a peripheral wall insertion groove 23 of a substantially rectangular shape for a peripheral wall of the plug to be inserted into, and a substantially rectangular surface part 24, surrounded by the peripheral wall insertion groove 23 with a plurality of circular pin-insertion holes 25 arranged for a plug pin to be inserted into. The pin-insertion holes 25 are arranged eccentrically as going toward a reference side 24b of the surface part 24, and the outlet 1 is provided with a blade-resting member, a terminal member connected with the blade rest member, and a body 10 equipped with an inside space for housing them. A part of the terminal member is set exposed outside the body 10, and by having the wire connected for supplying DC power at a part of the terminal member, DC power is supplied to the blade-resting member. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a direct current outlet having a plug connection portion to which a plug is detachably connected and which supplies direct current power.

  2. Description of the Related Art Conventionally, an AC outlet is provided in which a plug of an electric device such as a personal computer or a telephone is detachably connected, and operating power (AC power supply) is supplied to the electric device through the plug (for example, see Patent Document 1). . In such an AC outlet, there is no restriction on the direction in which the two plug pins are inserted into the two pin insertion holes (insertion ports) of the AC outlet. Therefore, the plug can be easily inserted into the AC outlet.

  On the other hand, since many electric devices use a DC power source as a drive source, AC power supplied from an AC outlet is once converted into DC power by an AC / DC converter and then supplied to the electric device. When this AC / DC converter converts AC power to DC power, power loss has occurred. In order to prevent such power loss, a DC outlet for supplying DC power to an electrical device is known (see, for example, Patent Document 2). This direct current outlet eliminates the provision of an AC / DC converter between the direct current outlet and the electrical device. Among such DC outlets, one having a plug pin disclosed in Patent Document 2 and two having a plug pin compliant with the IEC standard are known.

  By the way, in the plug provided with two plug pins, the positive and negative polarities are divided by these plug pins, and the positive electrode insertion hole into which the positive electrode of the plug pin is inserted and the negative electrode are inserted correspondingly. And a negative electrode insertion hole. Here, in such a configuration of two plug pins and two pin insertion holes, the positive electrode of the plug pin may be inserted into the negative electrode insertion hole, and the negative electrode of the plug pin may be inserted into the positive electrode insertion hole (ie, reverse insertion). there were. Therefore, the DC outlet is provided with a structure for suppressing the reverse insertion described above.

  Further, compared to an AC outlet, a DC outlet tends to sustain an arc generated between the DC outlet and the plug when the plug is pulled out from the DC outlet during energization. Therefore, in order to suppress the appearance of the arc from the outside of the plug, the plug is provided with a peripheral wall that covers the plug pin from the outside. As a DC outlet having such a peripheral wall and two plug pins, for example, there is a DC outlet complying with the IEC standard.

With reference to FIG. 18, the structure of the DC outlet and plug according to the IEC standard will be described.
As shown in FIG. 18A, the plug 100 includes two plug pins 101 for electrically connecting to a plug connection portion of a DC outlet (hereinafter, “plug connection portion 110”), and a plug pin 101. A cylindrical peripheral wall 102 that covers the plug pin 101 from the outside is provided. A rib 103 protruding downward is provided at the upper end of the peripheral wall 102 in the vertical direction. The plug pins 101 are disposed at the same position in the vertical direction as the center position CR1 of the peripheral wall 102, and are spaced apart from the center position CR1 in the left-right direction.

  As shown in FIG. 18B, the plug-in connection portion 110 is provided with a peripheral wall insertion groove 111 into which the peripheral wall 102 of the plug 100 is inserted, and a surface portion 112 surrounded by the peripheral wall insertion groove 111. . The peripheral wall insertion groove 111 is provided in an annular shape in a plan view viewed from the insertion direction of the plug 100. A rib insertion groove 113 for inserting the rib 103 of the plug 100 is provided at the upper end in the vertical direction of the peripheral wall insertion groove 111. The surface portion 112 is provided with two pin insertion holes 114 for inserting the plug pins 101 of the plug 100 respectively. The pin insertion holes 114 are arranged at the same position in the vertical direction as the center position CR2 of the peripheral wall insertion groove 111, and are arranged apart from the center position CR2 in the left-right direction.

  The plug 100 and the plug connection portion 110 are plugged into the plug connection portion 110 in a state where the plug pin 101 and the pin insertion hole 114, the peripheral wall 102 and the peripheral wall insertion groove 111, and the rib 103 and the rib insertion groove 113 are combined. By inserting 100, they are connected to each other.

JP-A-5-207626 Japanese Patent Laid-Open No. 7-15835

  By the way, in the plug 100 and the plug connection portion 110 described above, in order to insert the plug 100 into the plug connection portion 110 without reverse insertion, the rib 103 of the plug 100 is inserted into the rib insertion groove 113 of the plug connection portion 110. Must be inserted after alignment. That is, it is necessary for the operator to confirm the position of the rib 103 provided in the peripheral wall 102 of the plug 100 by visual observation or the like in advance, and to align the rib 103 with the position of the rib insertion groove 113. For this reason, the work of inserting the plug 100 into the plug-in connection portion 110 is complicated.

  Further, as a structure for suppressing reverse insertion, instead of omitting the rib 103, a pin insertion hole as shown in FIG. 19 (a) is provided at a position deviated upward in the vertical direction from the center position of the surface portion. Can be considered. Specifically, as shown in FIG. 19A, the plug-in connection portion 200 is provided with an annular peripheral wall insertion groove 201 in a plan view when viewed from the front in the front-rear direction. Two pin insertion holes 203 are provided above the center position CR3 (that is, the center of the circle) of the circular surface portion 202 surrounded by the peripheral wall insertion groove 201 in the vertical direction.

  However, the width of the surface portion 202 in the left-right direction becomes narrower as it goes upward in the vertical direction from the center position CR3. Therefore, the distance DR1 connecting the two pin insertion holes 203 to each other is reduced. As a result, the distance between the two plug pins (not shown) of the plugs inserted into the pin insertion holes 203 becomes small, and there is a problem that the dielectric strength decreases.

  Therefore, as shown in FIG. 19B, a configuration in which the surface portion 202 is formed larger by conceiving the outer diameter DR2 of the peripheral wall insertion groove 201 large is conceivable. As a result, the distance DR5 between the two pin insertion holes 203 can be increased (that is, DR5> DR1). However, as the surface portion 202 is enlarged, the plug-in connection portion 200 is increased in size.

Further, in the configuration of the DC outlet, a configuration in which the pin insertion hole is not a circular through hole but a rectangular through hole into which a flat blade (not shown) of the plug can be inserted is also conceivable.
Specifically, as shown in FIG. 20A, the plug-in connection portion 300 is provided with a substantially square-shaped peripheral wall insertion groove 301 in a plan view in the front-rear direction. Two flat blade insertion holes 303 are provided above the center position CR4 of the surface portion 302 surrounded by the peripheral wall insertion groove 301 (that is, the intersection of diagonal lines from the four corners of the surface portion 302) in the vertical direction. The flat blade insertion hole 303 is formed in a rectangular shape whose longitudinal direction is long.

  By the way, when a flat blade having the same cross-sectional area as the plug pin is formed, the length of the flat blade in the vertical direction is longer than the vertical length of the plug pin. Accordingly, the flat blade insertion hole 303 into which the flat blade is inserted is formed long in the vertical direction. Specifically, the lower end in the vertical direction of the flat blade insertion hole 303 is formed to the center position CR4. Thereby, when a plug is reversely inserted into the insertion connection part 300, a part of the flat blade is inserted into the flat blade insertion hole 303, and a blade receiving member (not shown) of the insertion connection part 200 is inserted. May come into contact with.

  Therefore, as shown in FIG. 20B, the outer diameter DR3, DR4 of the peripheral wall insertion groove 301 is formed larger than the peripheral wall insertion groove 301 of FIG. Conceivable. As a result, the entire flat blade insertion hole 303 is positioned above the center position CR4 in the vertical direction. Thereby, reverse insertion can be suppressed. However, as the surface portion 302 is enlarged, the plug-in connection portion 300 is increased in size.

  Further, in a DC outlet having a peripheral wall such as a DC outlet conforming to the above-mentioned IEC standard, there is no structure that can reliably perform electrical connection between the electric wire supplying DC power and the blade receiving member. .

  This invention is made | formed in view of the said situation, The place made into the objective is that the structure which suppresses reverse insertion is provided, enlargement is suppressed, and the electric wire and blade receiving member which supply DC power are suppressed. It is an object of the present invention to provide a direct current outlet capable of reliably performing electrical connection.

In the following, means for achieving the above object and its effects are described.
The invention described in claim 1 is a DC outlet having a plug connection portion to which a plug having a plurality of round plug pins and a peripheral wall covering the plurality of plug pins is detachably connected. The insertion connection portion is formed in a substantially square shape in a plan view as viewed from the plug insertion direction, and the peripheral wall insertion groove into which the peripheral wall is inserted, and is surrounded by the peripheral wall insertion groove and from the plug insertion direction. A surface portion formed in a substantially square shape in a plan view as viewed, and a circular pin insertion hole into which a plug pin is inserted is provided on the surface portion in a direction along one side of the outer peripheral edge of the surface portion. A plurality of pin insertion holes are arranged in a vertical direction that defines a direction perpendicular to the reference side with one side along the arrangement direction in which the pin insertion holes are arranged as a reference side. Pair on the side A blade receiving member that is provided at a position that is biased closer to the reference side than the side to be connected, and that is connected to the plug pin when the plug is connected to the plug-in connection portion, and a terminal that is electrically connected to the blade receiving member A member and a body having an internal space in which the blade receiving member and the terminal member are accommodated, and a part of the terminal member accommodated in the body is provided to be exposed outside the body and exposed outside the body. When an electric wire for supplying DC power is connected to a part of the terminal member, DC power is supplied from the electric wire to the blade receiving member via the terminal member.

  According to the present invention, since the peripheral wall insertion groove has a substantially rectangular shape, the direction in which the peripheral wall of the plug is inserted is limited as compared with the case where the peripheral wall insertion groove 111 shown in FIG. Become so. Therefore, since the operator can easily understand the direction in which the plug is inserted, the usability is improved. Then, the pin insertion hole is biased so that one side along the arrangement direction of the pin insertion holes in the surface portion is a reference side and is closer to the reference side than the side facing the reference side in the direction perpendicular to the reference side. Therefore, it is possible to suppress the reverse insertion of the plug into the DC outlet without forming a separate reverse insertion structure in the peripheral wall insertion groove or the peripheral wall of the plug. Therefore, it is possible to suppress an increase in the size of the DC outlet as compared with a case where a structure for reverse insertion is separately formed on the DC outlet.

  Moreover, the electric wire which supplies direct-current power is connected to a part of terminal member exposed in the exterior of a body, and direct-current power is supplied to a blade receiving member via a terminal member from an electric wire. For this reason, by connecting a wire for supplying DC power to a part of the terminal member exposed to the outside of the body by soldering, welding or the like, the electric power between the wire for supplying DC power and the blade receiving member Connection can be ensured.

  According to a second aspect of the present invention, in the direct current outlet according to the first aspect, the peripheral wall insertion groove has a shape in plan view as viewed from the plug insertion direction, and at least one of the four corners of the substantially rectangular shape is cut off. It is characterized in that it is formed into a shape.

  According to the present invention, at least one of the four corners of the substantially rectangular shape of the peripheral wall insertion groove is formed in a cut-out shape, so that the shape of the peripheral wall of the plug is similar to the shape of the substantially square shape. It will be provided as. As a result, the shape of the peripheral wall of the plug and the shape of the four corners of the substantially square shape of the peripheral wall insertion groove differ according to the supply voltage, so that it is possible to suppress mistakes in inserting the DC outlet and the plug with different supply voltages. become. In addition, since the operator can visually recognize the shape of the peripheral wall to know the insertion direction of the plug with respect to the DC outlet, the plug can be easily inserted into the DC outlet.

  According to a third aspect of the present invention, in the direct current outlet according to the second aspect, the surface portion of the surface portion as viewed from the insertion direction of the plug is cut off in the peripheral wall insertion groove in the four corners of a substantially rectangular shape. It is characterized in that a portion corresponding to the shape is formed into a cut shape.

  According to this invention, since the shape cut off in the surface portion is provided corresponding to the shape cut out in the peripheral wall insertion groove, it is possible to suppress the formation of the narrow width of the peripheral wall insertion groove.

  According to a fourth aspect of the present invention, in the DC outlet according to the second or third aspect, the cut shape of the substantially rectangular four corners of the peripheral wall insertion groove is opposed to the reference side rather than the reference side. It is provided at a position biased so as to approach the side.

  According to this invention, the above-mentioned shape is compared with the structure provided at a position that is biased so as to be closer to the reference side than the side facing the reference side among the four corners of the substantially rectangular shape of the peripheral wall insertion groove. Since the distance between the shape and the pin insertion hole can be increased, the strength of the surface portion can be improved. Accordingly, it is possible to suppress damage to the surface portion due to insertion and extraction of the plug.

  According to a fifth aspect of the present invention, in the DC outlet according to the third aspect, the cut shape in the surface portion is formed in an inclined shape, and the cut shape in the peripheral wall insertion groove is an inclined shape in the surface portion. It is formed in the shape inclined along.

  According to the present invention, the surface portion is formed in an inclined shape, and the peripheral wall insertion groove is formed in an inclined shape along the inclined shape of the surface portion. The suppressing structure can be achieved with a simple configuration. Therefore, the direct current outlet can be easily manufactured.

  According to a sixth aspect of the present invention, in the DC outlet according to any one of the first to fifth aspects, the peripheral wall insertion groove is provided so as to extend from the peripheral wall insertion groove, and at the power supply source. An extension groove portion into which a rib provided on the plug is inserted according to a difference in the type of a certain power supply circuit is provided.

  According to the present invention, since the extension groove portion is provided extending from the peripheral wall insertion groove, compared with the case where the extension groove portion and the peripheral wall insertion groove are provided separately, the insertion connection portion is enlarged and the strength of the surface portion is reduced. Can be suppressed.

  According to a seventh aspect of the present invention, in the DC outlet according to any one of the first to sixth aspects, a plug pin to be grounded is further inserted into the surface portion, and from the insertion direction of the plug. One grounding pin insertion hole formed in a circular shape in a plan view is provided.

  According to the present invention, since the ground pin insertion hole is provided in the plug-in connection portion, the DC outlet can be adapted to a plug having a ground side pin in addition to a plug having no ground side pin. become.

  ADVANTAGE OF THE INVENTION According to this invention, the structure which suppresses reverse insertion is provided, enlargement is suppressed, and the electrical connection with the electric wire and blade receiving member which supply DC power can be performed reliably.

The schematic diagram which shows schematic structure of the DC power distribution system provided with the DC outlet about one embodiment which materialized the DC outlet of the present invention. About the direct-current outlet of the embodiment, (a) The perspective view which shows the perspective structure of the outlet, (b) The front view which shows the front structure of the outlet. Regarding the DC outlet of the embodiment, (a) a perspective view showing a perspective structure before the outlet is attached to the mounting frame, and (b) a perspective view showing a perspective structure after the outlet is attached to the mounting frame. . The front view which shows the front structure of the state which attached the outlet socket to the attachment frame about the DC outlet socket of the embodiment. The disassembled perspective view which shows the perspective structure of the state which decomposed | disassembled the DC outlet socket of the embodiment. About the direct-current outlet of the embodiment, (a) The perspective view which shows the back surface structure of the outlet, (b) The side view which shows the side structure of the outlet. About the plug inserted in the direct-current outlet of the embodiment, (a) The perspective view which shows the perspective structure of the plug, (b) The top view which shows the planar structure of the plug. The perspective view which shows the insertion relationship of the DC outlet socket and plug of the embodiment. Regarding the DC outlet and plug of the embodiment, (a) a sectional view showing a sectional structure before the plug is inserted into the outlet, and (b) a sectional structure after the plug is inserted into the outlet. FIG. The top view which shows the planar structure in the case of inserting a plug reversely in the DC outlet socket of the embodiment. The top view which shows the planar structure of the plug-in connection part according to (a)-(d) supply voltage about the DC outlet of the embodiment. The top view which shows the planar structure of the plug-in connection part according to the kind of power supply circuit of (a), (b) electric power supply about the DC outlet of the embodiment. The front view which shows the front structure of (a)-(d) plug-in connection part about other embodiment which actualized the DC outlet socket of this invention. The front view which shows the front structure of (a)-(d) plug-in connection part about other embodiment which actualized the DC outlet socket of this invention. The front view which shows the front structure of a plug-in connection part about other embodiment which actualized the DC outlet socket of this invention. The front view which shows the front structure of an insertion connection part about the DC outlet as a comparative example. The front view which shows the front structure of (a), (b) plug-in connection part about the DC outlet as a comparative example. About the conventional DC outlet and plug, (a) The front view which shows the front structure of the plug, (b) The front view which shows the front structure of the plug-in connection part of the outlet. The front view which shows the front structure of (a) and (b) outlets about the DC outlet as a reference example. The front view which shows the front structure of (a) and (b) outlets about the DC outlet as a reference example.

With reference to FIGS. 1 to 15, an embodiment in which the DC outlet of the present invention is embodied as a DC outlet embedded in a residential device will be described.
With reference to FIG. 1, the whole DC power distribution system 70 provided in the house H will be described.

  As shown in FIG. 1, the house H is provided with a DC power supply unit 71 that outputs DC power and an electric device 72 as a load driven by the DC power. The electric device 72 is supplied with DC power through the DC supply line Wdc connected to the output terminal of the DC power supply unit 71. Here, examples of the electric device 72 include an information device 72a such as a personal computer, a lighting device 72b, an entrance system device 72c such as an interphone, and a residence security device 72d such as a fire detector.

  In addition, the current flowing through the DC supply line Wdc is monitored between the DC power supply unit 71 and the electric device 72, and when the abnormality is detected, the DC device from the DC power supply unit 71 to the electric device 72 is detected on the DC supply line Wdc. A DC breaker 73 is provided for restricting or cutting off the supply of DC power to. The DC breaker 73 is provided corresponding to each of the electric devices 72.

  The DC power supply unit 71 basically generates DC power by power conversion of an AC power supply AC supplied from outside the house H such as a commercial power supply. Specifically, the AC power of the AC power source AC is input to the AC / DC converter 76 including the switching power source through the main circuit breaker 75 provided in the distribution board 74 and converted into DC power. The DC power output from the AC / DC converter 76 is connected to each DC breaker 73 through the cooperative control unit 77.

  The DC power supply unit 71 is provided with a secondary battery 78a corresponding to a period in which power is not supplied from the AC power supply AC, such as a power failure period of the AC power supply AC, and a solar battery 78b and a fuel cell 78c that generate DC power. Yes. The secondary battery 78a, the solar battery 78b, and the fuel cell 78c serve as a distributed power supply 78 for the main power supply 79 including the AC / DC converter 76 that generates DC power from the AC power supply AC.

  The cooperative control unit 77 controls the distribution of power between the DC power from the main power supply 79 and the DC power from the distributed power supply 78. The cooperative control unit 77 is provided with a DC / DC converter 77a. The DC / DC converter 77a converts the direct current power from the main power source and the direct current voltage of the direct current power from the distributed power source 78 into necessary voltages. As described above, the DC power of the main power supply 79 and the distributed power supply 78 is distributed as necessary, and then the DC power is supplied to the electric device 72.

  Here, the DC outlet (hereinafter referred to as “outlet 1”) is provided between the DC breaker 73 and the information device 72a of the electric device 72 or a household electric appliance (not shown). The outlet 1 is connected to the DC supply line Wdc. Then, the plug 1C (see FIGS. 7 and 8) of the information device 72a and the household appliance is connected to the outlet 1, so that the DC power of the DC power supply unit 71 is supplied to the information device 72a and the household appliance. Will come to be.

  In the present embodiment, the outlet 1 is an embedded outlet that is embedded in the housing equipment 80. As the household equipment 80 in which the outlet 1 is embedded in this way, for example, a toilet unit such as a bathroom vanity having a basin is widely known. The outlet 1 provided in the toilet unit includes, for example, a dryer, A plug 1C of an electric appliance such as an electric toothbrush, an electric shaving device (not shown) is generally connected.

Next, with reference to FIGS. 2 to 4, the configuration of the outlet 1 and the mounting structure to the mounting frame 2 will be described.
As shown in FIG. 2A, the outlet 1 includes a substantially rectangular parallelepiped outlet body 1A, a blade receiving member 1B (see FIG. 9) housed in the outlet body 1A, and the like. Hereinafter, the insertion direction of the plug 1C (see FIG. 8) with respect to the outlet 1 will be referred to as “front-rear direction”, and the longitudinal direction of the outlet main body 1A will be referred to as “left-right direction” in plan view in the front-rear direction. The short direction is the “vertical direction”. In the front-rear direction, the plug 1C side with respect to the outlet 1 is referred to as “front”, and the outlet 1 side is referred to as “rear”. Moreover, the up-down direction and the left-right direction are orthogonal to each other.

  The outlet main body 1A is molded by injection molding using a resin material and is formed by using a resin material and a substantially rectangular parallelepiped body 10 (see FIG. 5 and the like) formed so that the blade receiving member 1B can be stored. The cover 20 is formed by injection molding and is formed so that the body 10 can be embedded in the rear in the front-rear direction.

  The blade receiving member 1B is connected to an electric wire extending from the DC supply line Wdc wired on the back side of the wall surface of the wall of the construction. Thereby, the DC power from the DC power supply unit 71 is supplied to the blade receiving member 1B.

  On the front side in the front-rear direction of the cover 20, a substantially rectangular insertion connection portion 21 is provided in a plan view in the front-rear direction. The plug connection portion 21 is detachably connected to a plug 1C for a DC power supply. Further, a substantially rectangular parallelepiped body storage portion 27 is provided on the rear side in the front-rear direction of the cover 20 and extends from the insertion connection portion 21 toward the rear in the front-rear direction. Engaging protrusions 28 for attaching the outlet 1 to the attachment frame 2 (see FIG. 3) of the housing equipment 80 are provided on both sides of the body storage portion 27 in the left-right direction.

  The plug connection portion 21 is provided with a peripheral wall insertion groove 23 that is recessed rearward in the front-rear direction from the front surface 22a of the plug connection portion 21 and is formed in a substantially square shape when viewed from the front in the front-rear direction. ing. In the present embodiment, the inclined portions 23a are provided at two portions in both the vertical direction and the horizontal direction of the four corners of the peripheral wall insertion groove 23 in a plan view as viewed from the insertion direction (front-rear direction) of the plug 1C. Each is provided. The shape of the peripheral wall insertion groove 23 of the plug-in connection portion 21 varies depending on the supply voltage and the type of the power supply circuit of the power supply source. A surface portion 24 having a front surface 24a that is flush with the front surface 22a in the front-rear direction is provided at a portion surrounded by the peripheral wall insertion groove 23. The surface portion 24 corresponds to the shape of the peripheral wall insertion groove 23 and is formed in a substantially rectangular shape having two sides along the vertical direction and two sides along the left-right direction in a plan view seen from the front in the front-rear direction. Has been. The surface portion 24 is provided with two pin insertion holes 25. These pin insertion holes 25 are power supply pin insertion holes provided as circular through holes in a plan view in the front-rear direction. Further, in the present embodiment, one ground pin insertion hole 26 is provided on the surface portion 24 as another pin insertion hole, and the ground pin insertion hole 26 is a plane in the front-rear direction, like the pin insertion hole 25. In view, it is provided as a circular through hole.

  As shown in FIG. 2B, the pin insertion hole 25 is one side of the outer peripheral edge of the surface portion 24 along the left-right direction, and the upper side in the vertical direction of the surface portion 24 is defined as a reference side 24b. These pin insertion holes 25 are provided at positions that are biased so as to approach the reference side 24b rather than the side 24c of the surface portion 24. That is, the pin insertion holes 25 are respectively provided in the upper and lower directions with respect to the center position C1 of the surface portion 24 (that is, the intersection of diagonal lines (dotted lines) from the four corners of the surface portion 24). The pin insertion holes 25 are arranged on both sides in the left-right direction with respect to the center position C1. In particular, the lower end 25a, which is the end on the side 24c side in the vertical direction of the pin insertion hole 25, is closer to the reference side 24b side than the straight line L1 (two-dot chain line) along the left-right direction including the center position C1. They are respectively arranged above the vertical direction from L1.

  The ground pin insertion hole 26 is provided below the pin insertion hole 25 in the vertical direction and below the center position C1 in the vertical direction. The ground pin insertion hole 26 is provided at the center position in the left-right direction of the two pin insertion holes 25. That is, the ground pin insertion hole 26 is provided at the same position in the left-right direction as the center position C1. In particular, the upper end portion 26a which is the end portion on the reference side 24b side in the vertical direction of the ground pin insertion hole 26 is disposed on the side 24c side from the straight line L1, that is, below the straight line L1 in the vertical direction.

  The width H1 in the left-right direction of the substantially rectangular surface portion 24 is formed to be substantially equal in the vertical direction at a location where the inclined portion 23a is not provided. Therefore, even if the two pin insertion holes 25 are provided above the center position C1 in the vertical direction, the distance D1 connecting the pin insertion holes 25 to each other can be suppressed. Accordingly, it is possible to suppress the occurrence of the problem that the distance DR1 between the pin insertion holes 203 of the plug-in connection portion 200 shown in FIG. 19A is small and the problem that the plug-in connection portion 200 shown in FIG. Will come to be.

  In addition, since the pin insertion hole 25 is provided in a circular shape, the width in the vertical direction can be narrower than that of the flat blade insertion hole 303. Therefore, the pin insertion hole 25 is located above the center position C1 of the surface portion 24 in the vertical direction as compared with the insertion connecting portion 300 in which the flat blade insertion hole 303 shown in FIG. Will be able to be located. As a result, the occurrence of the problem that the plug-in connection portion 300 shown in FIG.

  Further, since the ground pin insertion hole 26 is also provided in a circular shape, the width in the vertical direction can be reduced as compared with the ground flat blade insertion hole 304 (see FIG. 20). Therefore, the ground pin insertion hole 26 can be positioned below the center position C <b> 1 of the surface portion 24 in the vertical direction without increasing the size of the plug-in connection portion 21. In addition, the shortest distance between the pin insertion hole 25 and the ground pin insertion hole 26 can be made larger than the distance DR6 (see FIG. 20A) between the flat blade insertion hole 303 and the ground flat blade insertion hole 304. become able to. This makes it possible to increase the shortest distance between the plug pin 52A of the plug 1C and the ground plug pin 52B (both see FIG. 7) as compared with the plug corresponding to the plug-in connection portion 300.

  As shown in FIG. 3A, the body storage portion 27 of the outlet main body portion 1 </ b> A is formed in a size that can be inserted into the mounting frame 2 of the housing equipment 80. The mounting frame 2 is a part of the housing equipment 80 and is configured as a frame shape having a rectangular opening 40 whose longitudinal direction is the longitudinal direction. The shape of the opening 40 is the front of the mounting frame 2. The body storage portion 27 of the cover 20 is formed so as to be embedded in the opening 40.

  When the body storage portion 27 is embedded in the opening 40 from the front of the mounting frame 2, the engaging projection 28 is elastically deformed, and the mounting frame 2 is engaged with the rear end portion of the insertion connection portion 21 by the elastic force. It is clamped by the protrusion 28. In this way, as shown in FIG. 3B, the outlet 1 is embedded in the attachment frame 2 and attached. As shown in FIG. 4, when the outlet 1 is embedded in the attachment frame 2, only the plug-in connection portion 21 can be seen from the front in the front-rear direction from the attachment frame 2.

Next, with reference to FIG.5 and FIG.6, the internal structure of the outlet socket 1 and the electrical connection structure of the blade receiving member 1B in the outlet socket 1 and the electric wire which supplies DC power are demonstrated.
As shown in FIG. 5, the outlet 1 is connected to the plug pin 52 </ b> A and the ground plug pin 52 </ b> B (see FIG. 7) by connecting the plug 1 </ b> C to the plug-in connection portion 21 as a component housed in the outlet body 1 </ b> A. The blade receiving member 1B is provided. The body 10 provided in the outlet 1 has a blade receiving insertion hole 11 as an internal space for storing the blade receiving member 1B.

  In the present embodiment, the outlet 1 includes three blade receiving members 1B according to the shape of the plug 1C shown in FIG. The blade receiving member 1B made of a conductive metal material includes a holding portion 60 that can hold the plug pin 52A, and a terminal portion 61 that is provided continuously to the holding portion 60 and extends rearward from the holding portion 60. And an electric wire for supplying DC power is connected to the terminal portion 61. In the present embodiment, the holding portion 60 and the terminal portion 61 are integrally formed of a single material, and the blade receiving member 1B also serves as a terminal member connected to an electric wire that supplies DC power. It has become. In addition, the structure provided with the terminal member (not shown) which has the terminal part to which the electric wire which supplies DC power is connected as the receptacle 1 separate from the blade receiving member 1B which has the holding | maintenance part 60 may be sufficient. That is, as long as the holding portion 60 and the terminal portion are electrically connected, even if the blade receiving member 1B and the terminal member are made of an integral member, the blade receiving member 1B and the terminal member are It may consist of a separate member.

  As shown in FIG. 6A, in the present embodiment, the terminal portion 61 of the blade receiving member 1 </ b> B that is a terminal member is provided to be exposed to the outside of the body 10. That is, a through hole 12 corresponding to the shape of the terminal portion 61 is formed on the rear side of the body 10, and the terminal portion 61 of the blade receiving member 1 </ b> B protrudes rearward from the body 10 through the through hole 12. ing.

  Thus, the terminal 61 exposed outside the body 10 is connected to an electric wire extending from the DC supply line Wdc and supplying DC power by soldering. In addition, you may connect the terminal part 61 and an electric wire by other welding methods, such as arc welding, instead of soldering. By connecting the electric wire that supplies DC power to the terminal portion 61 in this way, DC power is supplied from the electric wire to the blade receiving member 1B.

Next, the configuration of the plug 1C and the insertion structure with the outlet 1 will be described with reference to FIGS.
As illustrated in FIG. 7A, the plug 1 </ b> C includes a cable portion 50 and a plug main body portion 51 connected to the cable portion 50. In the plug main body 51, a facing surface 51a facing the front surface portion 24 (see FIG. 8) of the outlet 1 in the front-rear direction is provided with two plug pins 52A extending rearward from the facing surface 51a and extending rearward from the facing surface 51a. One grounding plug pin 52B and a substantially rectangular peripheral wall 53 that covers the plug pins 52A and 52B from the outside are provided. The plug pin 52 </ b> A is provided so as to extend slightly forward in the front-rear direction from the same end portion of the peripheral wall 53. The ground plug pin 52B is provided so as to extend slightly rearward in the front-rear direction from the same end portion of the peripheral wall 53. The peripheral wall 53 is configured in a shape corresponding to the peripheral wall insertion groove 23.

  As shown in FIG. 7B, the plug pins 52 </ b> A are respectively provided in the upper and lower directions with respect to the center position C <b> 2 of the peripheral wall 53 (that is, the intersection of diagonal lines (one-dot chain lines) from the four corners of the peripheral wall 53). . The plug pins 52A are arranged on both sides in the left-right direction with respect to the center position C2. In particular, the lower end portion 52a in the vertical direction of the plug pin 52A is arranged above the straight line L2 (two-dot chain line) along the horizontal direction including the center position C2 in the vertical direction.

  The ground plug pin 52 </ b> B is provided below in the vertical direction with respect to the center position C <b> 2 of the peripheral wall 53 (that is, the intersection of diagonal lines (chain lines) from the four corners of the peripheral wall 53). The ground plug pin 52B is provided at the center position in the left-right direction with respect to the center position C2 (that is, the same position as the center position C2 in the left-right direction). In particular, the upper end 52b in the vertical direction of the ground plug pin 52B is disposed below the vertical line L2 (two-dot chain line) along the horizontal direction including the center position C2.

  As shown in FIG. 8, when the plug 1 </ b> C is inserted into the outlet 1, the peripheral wall 53 of the plug main body 51 is inserted into the peripheral wall insertion groove 23 of the plug-in connection portion 21. Then, the plug pin 52A is inserted into the pin insertion hole 25.

  By the way, as shown in FIG. 18, in the insertion connection part 110 based on the conventional IEC standard, since the surrounding wall insertion groove 111 and the surrounding wall 102 are formed in a circle in a plan view in the front-rear direction, the surrounding wall 102 of the plug 100 is formed. It will be inserted into the peripheral wall insertion groove 111 over 360 degrees in the circumferential direction.

  In that respect, in this embodiment, since both the peripheral wall insertion groove 23 and the peripheral wall 53 are substantially quadrangular (substantially rectangular) in a plan view when viewed from the front in the front-rear direction, the peripheral wall 53 is in relation to the peripheral wall insertion groove 23. The insertion direction is limited to two directions. Therefore, by limiting the insertion direction of the plug 1C with respect to the outlet 1, the operator can easily determine the direction in which the plug 1C is inserted into the outlet 1. As a result, the operator can easily insert the plug 1C into the outlet 1 while suppressing reverse insertion.

  As shown in FIG. 9A, the blade receiving member 1B is disposed in each pin insertion hole 25, and in the state where the plug 1C is inserted into the outlet 1, as shown in FIG. The plug pin 52A of the plug 1C is held in a state of being sandwiched between the blade receiving members 1B of the outlet 1. At this time, the holding portion 60 is elastically deformed, and the plug pin 52A is held by the elastic force. As a result, the outlet 1 and the plug 1C are electrically connected. Although not shown, the ground plug pin 52B is electrically connected to the outlet 1 by the same configuration.

  As shown in FIG. 10, when the plug 1C is to be reversely inserted into the outlet 1, the plug pin 52A of the plug 1C is positioned below the center position C1 of the surface portion 24 in the vertical direction. The ground plug pin 52B is positioned above the center position C1 of the surface portion 24 in the vertical direction. Accordingly, the plug pin 52A and the grounding plug pin 52B come into contact with the front surface 24a of the surface portion 24, so that the plug 1C cannot be inserted into the outlet 1.

  In this state, the pin insertion hole 25 and the plug pin 52A are separated from each other in the vertical direction, and the ground pin insertion hole 26 and the ground plug pin 52B are separated from each other in the vertical direction. Therefore, the plug pin 52A is reliably suppressed from being inserted into the pin insertion hole 25.

Next, with reference to FIG. 11, the shape of the plug-in connection part 21 according to a supply voltage is demonstrated. That is, you may change the shape of the above-mentioned insertion connection part 21 as follows.
There are a plurality of types of electrical equipment 72 and household appliances that operate upon receiving power supply from the DC power supply unit 71, with supply voltages of 6V, 12V, 24V, and 48V. Therefore, in a plan view seen from the insertion direction (front-rear direction) of the plug 1C, the shape of at least one of the four corners of the peripheral wall insertion groove 23 and the surface portion 24, which is a substantially rectangular portion of the insertion connection portion 21, is formed. By changing, the plug-in connection portion 21 can be identified according to the supply voltage. Specifically, on the basis of the case where the supply voltage is 24V, inclined portions 23a are provided at the four corners of the peripheral wall insertion groove 23 of 6V, 12V, and 48V. And the location corresponding to the inclination part 23a of the four corners of the surface part 24 is also formed in the shape inclined along the inclination part 23a.

  Specifically, as shown in FIG. 11 (a), when the supply voltage is 6V, the inclined portion 23a is provided at the lower part in the vertical direction and on the right side in the horizontal direction among the four corners of the peripheral wall insertion groove 23. It has been. As shown in FIG. 11 (b), when the supply voltage is 12 V, the inclined portion 23 a is provided in the lower part in the vertical direction and on the left side in the horizontal direction among the four corners of the peripheral wall insertion groove 23. As shown in FIG. 11 (c), when the supply voltage is 48V, inclined portions 23a are respectively provided at two portions of the four corners of the peripheral wall insertion groove 23, both in the vertical direction and in the horizontal direction. ing. In addition, as shown in FIG.11 (d), when a supply voltage is 24V, the inclination part is not formed in the four corners of the surrounding wall insertion groove 23. FIG.

  In addition, the shape of the peripheral wall 53 of the plug 1 </ b> C is also formed with an inclined portion according to the shape of the peripheral wall insertion groove 23 described above. Thus, the plug 1C can be identified according to the supply voltage. As described above, the plug 1C cannot be inserted into the outlet 1 unless the shape of the peripheral wall 53 of the plug 1C matches the shape of the peripheral wall insertion groove 23 of the plug-in connection portion 21. As a result, the connection of the outlet 1 and the plug 1C having different supply voltages is suppressed.

  By the way, as shown in FIG. 16, as the plug-in connection portion according to the supply voltage, the plug-in connection portion 400 compliant with the IEC standard is provided with four notch grooves 404 to 407 according to the supply voltage. Specifically, the insertion connection portion 400 is provided with an annular peripheral wall insertion groove 401 in a plan view in the front-rear direction. The surface portion 402 surrounded by the peripheral wall insertion groove 401 is provided with a pin insertion hole 403 into which a plug pin (not shown) of the plug is inserted. The above-described notch grooves 404 to 407 are provided below the outer peripheral edge of the surface portion 402 in the vertical direction so as to be integrated with the peripheral wall insertion groove 401 and recessed inward from the peripheral wall insertion groove 401. Further, a notch groove 408 for suppressing reverse plug insertion is provided above the outer peripheral edge of the surface portion 402 in the vertical direction.

  Here, the notch grooves 404 to 407 correspond to supply voltages of 6V, 12V, 24V, and 48V, respectively, and 120 °, 150 °, 210 °, and 240 ° clockwise with the notch groove 408 as the reference position (0 °). It will be provided at each position. The plug is provided with identification ribs corresponding to the cutout grooves 404 to 407, respectively. By inserting the identification ribs into the cutout grooves 404 to 407, plugs suitable for the supply voltage are inserted into the plug-in connection portion 400.

  However, when such a cutout groove 404 and a cutout groove 407 are provided, the positions of the cutout groove 404 and the cutout groove 407 and the pin insertion hole 403 are arranged close to each other. Thereby, there existed a problem which the intensity | strength of the surface part 402 will fall. In addition, since the identification rib of the plug is provided inside the peripheral wall, it is difficult for the operator to visually recognize the position of the identification rib from the outside in front of the plug in the front-rear direction. Therefore, the operator confirms the position of the identification rib from the rear in the front-rear direction of the plug, aligns the position of the plug with the fitting position in the notch grooves 404 to 407 of the plug-in connection part 400, and then inserts the plug-in connection part 400. Had to insert a plug into. This complicates the work of inserting the plug into the plug-in connection 400.

  In that respect, in the outlet 1 according to the present embodiment, since the inclined portion 23a is provided below the four corners of the peripheral wall insertion groove 23 in the vertical direction, compared to the configuration of the above-described plug connection portion 400, The distance between the inclined portion 23a and the pin insertion hole 25 is increased. Therefore, compared with the structure of the above-mentioned plug connection part 400, the fall of the intensity | strength of the surface part 24 can be suppressed now.

  In addition, since the shape of the peripheral wall 53 of the plug 1C is changed in accordance with the supply voltage, the position where the operator matches the plug 1C and the plug-in connection portion 21 from the outside in front of the plug 1C in the front-rear direction. It can be confirmed visually. Therefore, the operator can easily insert the plug 1 </ b> C into the plug-in connection portion 21.

  Next, with reference to FIG. 12, the shape of the plug-in connection part 21 according to the difference in the kind of power supply circuit (not shown) which is an electric power supply source is demonstrated. This power supply circuit is provided between the DC power supply unit 71 and the outlet 1, and is provided, for example, in the distribution board 74.

  There are at least two types of such power supply circuits, that is, an ultra-low voltage circuit (ELV) and a safety extra-low voltage (SELV) circuit. These ELV and SELV are defined in IEC 60950-1 and IEC 60335-1 in the IEC standard, respectively.

  The electric equipment 72 such as household electric appliances has different internal insulation structures depending on the ELV and SELV. That is, in the electric equipment 72 corresponding to ELV, this insulation structure becomes strict by adopting a double insulation structure or a reinforced insulation structure as the insulation structure. On the other hand, in the electrical equipment 72 according to SELV, the insulation structure may not adopt a double insulation structure or a reinforced insulation structure, and the insulation structure is simplified compared to the electrical equipment 72 according to ELV.

  By the way, when the electric equipment 72 according to ELV is connected to the outlet 1 for SELV, since the insulation structure of this electric equipment 72 is severe, a problem does not arise. On the other hand, when the electric device 72 corresponding to SELV is connected to the ELV outlet 1, the insulating structure of the electric device 72 is simplified, so that the electric device 72 is connected when dangerous voltage is supplied. It may break down. Therefore, it is necessary to distinguish the outlet 1 and the plug 1C from those for ELV and those for SELV. In particular, it is necessary to prevent the ELV outlet 1 from being erroneously connected to the electric device 72 corresponding to the SELV.

  Therefore, as shown in FIG. 12A, the SELV plug-in connection portion 21 includes an extension groove portion on one side below the vertical direction of the peripheral wall insertion groove 23 and on the left side in the left-right direction as described above. 23b is provided. The extension groove 23b is provided integrally with the peripheral wall insertion groove 23, and is provided so as to extend upward in the vertical direction from the one side. On the other hand, as shown in FIG. 12B, the insertion connection portion 21 for ELV has a structure in which the extension groove portion 23b is omitted, and the shape of the above-described insertion connection portion 21 is changed in this way. You can also. As described above, the SELV plug-in connection portion 21 and the ELV plug-in connection portion 21 can be identified.

  In addition, the ELV plug 1C can be inserted into the SELV plug-in connection portion 21, but the SELV plug 1C cannot be inserted into the ELV plug-in connection portion 21. As a result, it is possible to suppress erroneous connection of the electric device 72 corresponding to SELV to the ELV outlet 1.

  Moreover, as an insertion connection part according to the kind of said power supply circuit, as shown to Fig.17 (a), the structure (1st structure) by which the extension groove part 23b is provided separately from the surrounding wall insertion groove 23 can be considered. Further, as shown in FIG. 17B, a configuration (second configuration) in which the extension groove portion 23b is provided outside the peripheral wall insertion groove 23, that is, outside the surface portion 24 is conceivable.

  However, in the first configuration, there is a problem that the strength of the surface portion 24 is reduced due to the distance between the extension groove portion 23b and the pin insertion hole 25 being close. On the other hand, the second configuration solves the above-described problem of the strength reduction of the surface portion 24, but there is a problem that the insertion connecting portion 21 is increased in size by the extension groove portion 23b.

  Therefore, if the extension groove portion 23b is provided integrally with the peripheral wall insertion groove 23 below the peripheral wall insertion groove 23 in the vertical direction, the distance between the pin insertion hole 25 and the extension groove portion 23b is compared with the first configuration. You can make it bigger. Moreover, if the extension groove part 23b is the structure extended in the up-down direction rather than the surrounding wall insertion groove 23 (namely, the extension groove part 23b is provided in the surface part 24), the enlargement of the insertion connection part 21 can be suppressed. It becomes like this. As described above, by providing the extended groove portion 23b integrally with the peripheral wall insertion groove 23, both the above-described problems of the first configuration and the second configuration can be solved.

According to the outlet 1 of the present embodiment, the following effects can be achieved.
(1) The peripheral wall insertion groove 23 of the plug-in connection portion 21 has a substantially rectangular shape. Therefore, the direction in which the peripheral wall 53 of the plug 1C is inserted is limited as compared with the case where the peripheral wall insertion groove 111 shown in FIG. 18 has an annular shape. Thereby, since an operator can understand easily the direction which inserts the plug 1C in the insertion connection part 21, usability improves. As a result, the operator can easily insert the plug 1C into the outlet 1 while suppressing reverse insertion.

  And the pin insertion hole 25 is a structure provided in the up-down direction rather than the center position C1 of the one side of the up-down direction among the outer periphery of the surface part 24. FIG. Accordingly, it is possible to suppress the reverse insertion of the plug 1 </ b> C into the outlet 1 without separately forming a structure for reverse insertion in the peripheral wall insertion groove 23 and the peripheral wall 53. Therefore, compared with the case where the structure for reverse insertion is separately formed on the outlet, the increase in size of the outlet 1 can be suppressed.

  (2) When an electric wire supplying DC power is connected to the terminal portion 61 of the blade receiving member 1B, which is a terminal member exposed outside the body 10, DC electric power is supplied from the electric wire to the blade receiving member 1B. . For this reason, the electric wire and blade receiving member which supply direct-current power by connecting the electric wire which supplies direct-current power to the terminal part 61 of the blade receiving member exposed to the exterior of the body 10 by soldering, welding, etc. The electrical connection with 1B can be reliably performed.

  (3) The blade receiving member 1B and the terminal member are formed as a single member. That is, since the blade receiving member 1B also serves as a terminal member, the number of parts of the outlet 1 can be reduced as compared with the case where the blade receiving member 1B and the terminal member are formed separately.

  (4) The configuration is such that the lower end 25a of the pin insertion hole 25 is located above the center position C1 in the vertical direction. Therefore, even when the plug 1 </ b> C is reversely inserted into the outlet 1, the plug pin 52 </ b> A can be suppressed from being inserted into the pin insertion hole 25. As a result, the above-described reverse insertion can be more reliably suppressed.

  (5) The peripheral wall insertion groove 23 is provided with an inclined portion 23a. Therefore, according to the shape of the peripheral wall insertion groove 23, the shape of the peripheral wall 53 is also provided with an inclined portion. Thereby, since the shape of the surrounding wall 53 and the shape of the surrounding wall insertion groove | channel 23 differ according to a supply voltage, it becomes possible to suppress the mistake of the insertion between the outlet 1 and the plug 1C having different supply voltages.

  Further, since the operator can recognize the insertion direction of the plug 1C with respect to the outlet 1 by visually recognizing the shape of the peripheral wall 53 from the front in the front-rear direction, the operator can easily insert the plug 1C into the outlet 1.

  (6) The inclined portion 23a is provided below the peripheral wall insertion groove 23 in the vertical direction (that is, on the side 24c side of the surface portion 24). Therefore, the distance between the inclined portion 23a and the pin insertion hole 25 can be increased as compared with the configuration in which the inclined portion is provided above the peripheral wall insertion groove 23 in the vertical direction (that is, on the reference side 24b side of the surface portion 24). Therefore, the strength of the surface portion 24 can be improved. As a result, it is possible to suppress damage to the surface portion 24 due to insertion / extraction of the plug 1C.

  (7) The surface portion 24 has a configuration in which a shape inclined along the inclined portion 23 a is formed at a location corresponding to the inclined portion 23 a of the peripheral wall insertion groove 23. Accordingly, it is possible to prevent the circumferential wall insertion groove 23 from being narrowly formed.

  Here, when there is no inclined shape in the portion corresponding to the inclined portion 23a of the peripheral wall insertion groove 23 in the surface portion, only the shape of the outer peripheral edge of the peripheral wall insertion groove 23 becomes an inclined shape, and therefore the outer peripheral edge of the surface portion And the width of the outer peripheral edge of the peripheral wall insertion groove 23 is narrower than that of the peripheral wall insertion groove 23 other than the inclined portion 23a. In that respect, in this embodiment, since the above-described inclined shape of the surface portion 24 is provided corresponding to the inclined portion 23a, the above-described problem that the width of the peripheral wall insertion groove 23 is reduced can be solved. .

  (8) The inclined portion 23 a of the peripheral wall insertion groove 23 is provided as a shape inclined along the inclined shape of the surface portion 24. Therefore, since it has a simple shape in which only the four corners of the peripheral wall insertion groove 23 and the surface portion 24 are cut off obliquely, a structure that suppresses an erroneous insertion between the outlet 1 and the plug 1C having different supply voltages is achieved with a simple configuration. Will be able to. Therefore, the outlet 1 can be easily manufactured.

  (9) The extended groove portion 23b extends from the peripheral wall insertion groove 23. Therefore, compared with the case where the extension groove part 23b and the surrounding wall insertion groove 23 are provided separately, the enlargement of the plug-in connection part 21 and the strength reduction of the surface part 24 can be suppressed.

  (10) The extended groove portion 23b is provided on one side below the peripheral wall insertion groove 23 in the vertical direction. Therefore, the strength of the surface portion 24 can be improved as compared with the structure in which the extension groove portion is provided between the pin insertion hole 25 and the peripheral wall insertion groove 23. As a result, it is possible to suppress damage to the surface portion 24 due to insertion / extraction of the plug 1C.

  (11) The front surface 22a of the plug-in connection portion 21 and the front surface 24a of the surface portion 24 are flush with each other in the front-rear direction. The plug pin 52A of the plug 1C is configured to extend slightly forward in the front-rear direction from the peripheral wall 53. According to these configurations, when the plug 1 </ b> C is reversely inserted into the plug-in connection portion 21, the plug pin 52 </ b> A comes into contact with the surface portion 24 before the peripheral wall 53 is largely inserted into the peripheral wall insertion groove 23. Therefore, the operator can clearly recognize that the plug 1C has been reversely inserted into the plug-in connection portion 21, and when the plug 1C is reversely inserted into the plug-in connection portion 21, the plug 1C is plugged in. The state attached to the part 21 cannot be maintained. Thereby, it can control that the state where plug 1C was reversely inserted in plug-in connection part 21 is maintained.

  (12) The surface portion 24 is further provided with a ground plug pin 52B to be grounded and one ground pin insertion hole 26 formed in a circular shape in a plan view as viewed from the insertion direction of the plug 1C. ing. For this reason, the outlet 1 can cope with a plug 1C having the ground plug pin 52B in addition to a plug (not shown) that does not have the ground plug pin 52B.

(Other embodiments)
The outlet 1 of the present embodiment is not limited to the above embodiment, and for example, the following changes can be made. Further, the following modifications are not only applied to the above-described embodiment, but can also be applied when different modifications are combined with each other.

  -The extension groove part 23b may not be the structure provided in the surface part 24 side. For example, as shown in FIG. 13A, the extension groove 23 b can be provided so as to extend downward from one side of the circumferential wall insertion groove 23 in the vertical direction. Moreover, as shown in FIG.13 (b), the extension groove part 23b can also be provided so that it may extend upward from the one side of the upper direction of the surrounding wall insertion groove 23 in the up-down direction. Moreover, as shown in FIG.13 (c), the extension groove part 23b can also be provided so that it may extend toward the left from the left side of the left-right direction of the surrounding wall insertion groove 23. FIG. Moreover, as shown in FIG.13 (d), the extension groove part 23b can also be provided so that it may extend rightward from the right side of the left-right direction of the surrounding wall insertion groove 23. As shown in FIG.

  In the above embodiment, the inclined portion 23a is provided at the corner on one side below the peripheral wall insertion groove 23 in the vertical direction, so that the supply voltage of the outlet 1 is identified. The configuration for identifying is not limited to this. The shape of the peripheral wall insertion groove 23 may be changed so long as the peripheral wall 53 of the plug 1C having only a suitable supply voltage can be inserted. Therefore, for example, as shown in FIG. 14A, any one of the four corners of the peripheral wall insertion groove 23 can be cut out to provide a step-shaped recess 23c. Moreover, as shown in FIG.14 (b), after protruding the surrounding wall insertion groove 23, it can also provide the protrusion 23d protruded outside. The peripheral wall 53 of the plug 1C is formed in the same shape as the peripheral wall insertion groove 23 in a plan view as viewed from the rear in the front-rear direction. Further, instead of cutting out any of the four corners of the peripheral wall insertion groove 23 and providing the recess 23c, as shown in FIGS. 14 (c) and 14 (d), the extension groove portion 23b is provided below the peripheral wall insertion groove 23 in the vertical direction. It can also be provided at the right end or left end of one side in the left-right direction.

  In the above embodiment, the inclined portion 23a and the extended groove portion 23b are provided on one side below the peripheral wall insertion groove 23 in the vertical direction, but the position of the extended groove portion 23b is not limited to this. For example, the inclined portion 23 a and the extension groove portion 23 b may be provided on one side above the peripheral wall insertion groove 23 in the vertical direction.

  In the above embodiment, the lower end portion 25a of the pin insertion hole 25 is disposed above the center position C1 of the surface portion 24 in the vertical direction. However, the position of the lower end portion 25a is not limited to this. Absent. The plug pin 52A may not be inserted into the pin insertion hole 25 when the plug 1C is reversely inserted into the outlet 1. Therefore, the lower end portion 25a can be set at substantially the same position as the center position C1.

  In the above embodiment, the ground pin insertion hole 26 is provided in the surface portion 24, but as shown in FIG. 15, the main socket 1 is not provided with the ground pin insertion hole 26 in the surface portion 24. The invention can also be applied.

  -The size of the main body 1A conforms to Japanese Industrial Standards, and the module size can be attached to up to three on the mounting frame of a large-angle continuous wiring device. It may be formed in the size of 3 minutes or 3 pieces. If comprised in this way, it will become possible to attach 1 A of receptacle main bodies to the attachment frame (not shown) of the other wiring apparatus normalized similarly. Therefore, it is not necessary to separately prepare a mounting frame dedicated to the outlet body 1A, the mounting frame can be shared, and the usability of the outlet 1 is improved.

  In the above-described embodiment, the peripheral wall insertion groove 23 is formed in a rectangular shape that is long in the left-right direction and short in the vertical direction, but the shape of the peripheral wall insertion groove 23 is not limited to this. The peripheral wall insertion groove 23 can also be provided as a square shape having the same length in the left-right direction and the up-down direction.

  DESCRIPTION OF SYMBOLS 1 ... Outlet (DC outlet), 1A ... Outlet body part, 1B ... Blade receiving member, 1C ... Plug, 2 ... Mounting frame, 4, 4a ... AC outlet, 5 ... Outlet for coaxial cable, 6 ... For telephone line Modular outlet, 7 ... Modular outlet for LAN, 8 ... Switch, 10 ... Body, 11 ... Blade receiving insertion hole, 12 ... Through hole, 20 ... Cover, 21 ... Insertion connection, 22a ... Front, 23 ... Perimeter wall insertion Groove, 23a ... inclined portion, 23b ... extension groove portion, 23c ... concave portion, 23d ... projection, 24 ... surface portion, 24a ... front surface, 24b ... reference side, 24c ... side, 25 ... pin insertion hole, 25a ... lower end portion, 26 ... Ground pin insertion hole, 26a ... Upper end portion, 27 ... Body housing portion, 28 ... Engagement projection, 40 ... Opening portion, 50 ... Cable portion, 51 ... Plug body portion, 51a ... Opposing surface, 52A ... Plug pin, 5 a ... lower end part, 52B ... grounding plug pin, 52b ... upper end part, 53 ... peripheral wall, 60 ... holding part, 61 ... terminal part, 70 ... DC distribution system, 71 ... DC power supply part, 72 ... electric equipment, 72a ... information Equipment, 72b ... Lighting equipment, 72c ... Entrance system equipment, 72d ... Home security equipment, 73 ... DC breaker, 74 ... Distribution panel, 75 ... Master breaker, 76 ... AC / DC converter, 77 ... Coordination control unit, 77a ... DC / DC converter, 78 ... Distributed power supply, 78a ... Secondary battery, 78b ... Solar battery, 78c ... Fuel cell, 79 ... Main power supply, 80 ... Housing equipment, AC ... AC power supply, H ... House, Wdc ... DC supply line.

Claims (7)

A DC outlet having a plug connection portion to which a plug having a plurality of round plug pins and a peripheral wall covering the plurality of plug pins is detachably connected,
The plug connection portion is formed in a substantially quadrangular shape in a plan view as viewed from the insertion direction of the plug and is inserted into the peripheral wall insertion groove into which the peripheral wall is inserted. A surface portion formed in a substantially square shape in a plan view seen from the direction,
The surface portion is provided so that a plurality of pin insertion holes formed in a circular shape into which the plug pins are inserted are arranged in a direction along one side of the outer peripheral edge of the surface portion,
The pin insertion hole has a side along the arrangement direction in which the pin insertion holes are arranged as a reference side, and in a vertical direction defining a direction perpendicular to the reference side, than a side facing the reference side Provided at a position biased so as to approach the reference side,
A blade receiving member connected to the plug pin by connecting the plug to the plug-in connection portion, a terminal member electrically connected to the blade receiving member, and the blade receiving member and the terminal member are accommodated. A body having an internal space to be
A part of the terminal member housed in the body is provided exposed to the outside of the body,
By connecting an electric wire supplying DC power to a part of the terminal member exposed outside the body, DC power is supplied from the electric wire to the blade receiving member via the terminal member. Characteristic DC outlet. In the DC outlet according to claim 1,
The DC wall outlet is characterized in that the peripheral wall insertion groove is formed in a shape in which at least one of four corners of a substantially rectangular shape is cut off when viewed from the insertion direction of the plug. In the DC outlet according to claim 2,
The surface portion is formed in a shape in which a portion in a plan view viewed from the insertion direction of the plug is cut out at a portion corresponding to the cut-out shape in the peripheral wall insertion groove in four corners of a substantially square shape. DC outlet characterized by that. In the direct current outlet according to claim 2 or claim 3,
The DC outlet is characterized in that the cut shape of the substantially rectangular four corners of the peripheral wall insertion groove is provided at a position deviated from the reference side so as to be closer to the side facing the reference side. In the DC outlet according to claim 3,
The cut shape in the surface portion is formed into an inclined shape,
The DC outlet is characterized in that the cut shape of the peripheral wall insertion groove is formed in a shape inclined along the inclined shape of the surface portion. In the direct-current outlet as described in any one of Claims 1-5,
The peripheral wall insertion groove is provided to extend from the peripheral wall insertion groove, and is provided with an extension groove portion into which a rib provided on the plug is inserted according to the difference in the type of power supply circuit that is a power supply source. Characteristic DC outlet. In the direct-current outlet as described in any one of Claims 1-6,
A plug pin to be grounded is further inserted in the surface portion, and one ground pin insertion hole formed in a circular shape in a plan view as viewed from the insertion direction of the plug is provided. DC outlet.

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