JP3610801B2 - Exposed outlet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exposed outlet provided with a ground wire connecting portion to which a ground wire can be connected and being exposed and disposed on a construction surface such as a wall surface.
[0002]
[Prior art]
In the conventional exposed outlet, the ground wire connecting portion for connecting the ground wire is housed in the housing and is not exposed to the outside. For this reason, the housing is assembled after the housing is divided and the ground wire is connected to the ground wire connecting portion in a state where the housing is separated.
[0003]
[Problems to be solved by the invention]
In the above conventional configuration, since the ground wire connection portion is not exposed outside the housing, for example, a ground wire attached to a power tool or the like (usually a crimp terminal or a hook clip is attached to the tip portion) is connected. I could not. Also, since the screw terminal is usually used for the ground wire connection, even if the ground wire connection is exposed outside the housing, the ground wire must be connected using a connector such as a hook clip. It was difficult.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to connect a ground wire in a state where the housing is assembled and to be easily connected even with a connecting tool such as a hook clip. To provide an exposed outlet.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is provided with a set of three contact insertion holes on the front side into which a contact on the voltage side, a contact on the ground side, and a contact on the ground electrode are respectively inserted. Housing, a voltage side blade receiving spring, a ground side blade receiving spring, and a grounding electrode blade receiving spring electrically connected to each contact inserted from each contact insertion port in the housing, and these blades Voltage-side terminal, ground-side terminal, and grounding electrode terminal that are connected separately from the receiving spring and connected to external wires, and ground-wire connection that is exposed to the front side of the housing and connected to the external ground wire A mounting table that is narrower than the width of the housing from the vicinity of the rear surface of the housing to the front side so that the front surface of the mounting table is not positioned forward of the front surface of the housing. Ground wire connection on the front And setting, and characterized in that projecting the ground terminal piece extending upright away from the front face of the inclined while the mounting table toward the edge of the ground wire connection portion to the tip, the front surface of the housing ground wire connection portion The ground wire can be connected to the ground wire connection part while the housing is assembled, and a connection tool such as a hook clip can be easily connected to the ground terminal piece of the ground wire connection part. It becomes possible to do. In addition, it is easy to connect the ground wire by separating the ground wire connecting portion from the construction surface to which the housing is attached.
[0007]
The invention of claim 2 is characterized in that, in the invention of claim 1 , a step is formed on the back surface of the housing which becomes an attachment surface to the construction surface, and the housing is attached to the construction surface which is a cylindrical surface But the housing can be made difficult to break.
[0008]
The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, a feed wiring terminal portion for feeding and wiring each separately from the voltage side terminal portion, the ground side terminal portion and the ground electrode terminal portion is provided. , The usability can be improved.
[0009]
According to a fourth aspect of the present invention, in the first, second, or third aspect of the present invention, a set of three , in which a voltage side contact, a ground side contact, and a ground pole contact are respectively inserted into the front surface of the housing. A plurality of sets of contact insertion holes are provided, and a plurality of plugs can be connected to one exposed outlet, which improves usability.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
[0011]
FIG. 1 is an exploded perspective view of the present embodiment, and a housing 1 is configured by connecting a body 1a and a cover 1b, which are formed in a substantially rectangular shape by a thermosetting resin such as urea resin, by an assembly screw 2.
[0012]
On the front surface of the cover 1b (front surface of the housing 1), two sets of three contact insertion ports 4a, 4b, 4c are provided along the longitudinal direction, and a plug with a ground electrode (not shown). Can be connected at the same time. Here, the contact insertion ports 4a and 4a into which the contacts (flat plug blades) on the ground side of the plug are inserted, and the contacts into which the contacts (flat plug blades) on the voltage side of the same plug are inserted. The child insertion ports 4b, 4b are formed in a rectangular shape, and the contact insertion ports 4a, 4a on the ground side have longer longitudinal dimensions than the contact insertion ports 4b, 4b on the voltage side. . Further, the contact insertion ports 4c and 4c into which the contact of the ground electrode of the plug (for example, a conductive pin having a substantially U-shaped cross section or a cylindrical shape) is inserted are formed in a substantially semicircular shape. In addition, a screw insertion hole 3 through which the assembly screw 2 is inserted is provided substantially at the front center of the cover 1b.
[0013]
On the other hand, a pair of ground-side blade receiving springs 11, 11 that are electrically and mechanically connected to the contacts (plug blades and conductive pins) inserted from the contact insertion ports 4 a. The voltage side blade receiving springs 21, 21 and the grounding electrode blade receiving springs 31, 31 are housed so as to be located at the back of the respective contact insertion ports 4 a, 4 b, 4 c. Here, the ground-side blade receiving springs 11 and 11 and the voltage-side blade receiving springs 21 and 21 are formed by processing a plate-like metal member, so that the ground-side terminal plate 12 and the ground-side terminal plate 12 together with the terminal screws 40 The both ends of the voltage side terminal plate 22 are integrally formed in a substantially inverted Ω shape. The ground side blade receiving springs 11, 11 and the ground side terminal plate 12 constitute the ground side blade receiving spring block 10, and the voltage side blade receiving springs 21, 21 and the voltage side terminal plate 22 comprise the voltage side blade. A receiving spring block 20 is configured.
[0014]
The ground-side terminal plate 12 is provided with a pair of screw holes 12a and 12a into which terminal screws 40 are screwed, and the ground-side blade receiving springs 11 and 11 are respectively provided at the ends of the extended pieces 13 extending from one end thereof. Is formed. Further, since the knurls 18 are provided substantially radially around the screw holes 12a and 12a on the upper surface of the ground side terminal plate 12 around the screw holes 12a and 12a, between the terminal screw 40 and the ground side terminal plate 12 is provided. There is an advantage that the slip of the core wire of the electric wire sandwiched by is suppressed, and the electric wire is not inadvertently pulled out. Although the ground side blade receiving spring block 10 has been described here, the voltage side blade receiving spring block 20 also has a common structure with the ground side blade receiving spring block 10. That is, the voltage side terminal plate 22 is provided with a pair of screw holes 22a and 22a into which the terminal screws 40 are screwed, and the voltage side blade receiving springs 21 are respectively provided at the ends of the extending pieces 23 extending from one end thereof. , 21 are formed. In addition, knurls 28 are provided on the upper surface of the voltage side terminal plate 22 around the screw holes 22a and 22a in a substantially radial manner centering on the screw holes 22a and 22a. The ground side terminal plate 12 and the voltage side terminal plate 22 have protrusions 14 that are press-fitted into press-fitting grooves 7a, 7a, 8a, and 8a having a substantially T-shape in plan view provided in the body 1a, as will be described later. 14, 24, 24 are cut and raised. Further, as described above, by providing a pair of screw holes 12a and 22a in the ground-side and voltage-side terminal plates 12 and 22, respectively, one terminal screw 40 and the terminal plate 12 and 22 are used for feed wiring for feed wiring. A terminal part is configured.
[0015]
On the other hand, the grounding electrode blade receiving spring block 30 includes a pair of grounding electrode blade receiving springs 31, 31, a strip-shaped bridging piece 32 that bridges these grounding electrode blade receiving springs 31, 31, and a bridging piece 32. A grounding electrode terminal plate 33 extending left and right from one end of the wire and a ground wire connecting terminal plate 35 constituting a ground wire connecting portion 34 described later are integrally formed of a plate-shaped metal member. The grounding electrode terminal plate 33 is provided with screw holes 33a into which the terminal screws 41 are screwed at both ends, and one grounding electrode blade receiving spring 31 is bent in a substantially inverted Ω shape at a substantially central part. . Here, on the bridging piece 32 and the ground electrode terminal plate 33, protrusions 32a, 33b, and 33b that are respectively press-fitted into press-fitting grooves 9a that are substantially T-shaped in a plan view provided in the body 1a as described later protrude. It is installed. The ground electrode terminal plate 33 and the terminal screw 41 constitute a ground electrode terminal portion and a feed wiring terminal portion. In addition, knurls 33c are also formed substantially radially at the periphery of the screw hole 33a of the ground electrode terminal plate 33.
[0016]
On the other hand, the ground wire connection terminal plate 35 is provided between the distal ends of substantially crank-shaped rising pieces 36 and 36 extending from the end edge of the ground electrode terminal plate 33 on the opposite side to the bridging piece 32. A screw hole 35 a into which a terminal screw 42 is screwed is provided at the center, and ground terminal pieces 37, 37 that stand upward from the both end edges while being inclined toward the tip are provided in the left-right direction along the ground electrode terminal plate 33. Projected to Further, from the connecting portion of the ground wire connection terminal plate 35 with the rising pieces 36, 36, it is press-fitted into a press-fit hole 51 having a substantially T-shape in plan view provided on the front surface of the mounting table 50 of the body 1a as will be described later. The press-fitting pieces 35b and 35b are bent. In addition, knurls 35c are also formed substantially radially at the periphery of the screw hole 35a of the ground wire connection terminal plate 35.
[0017]
A substantially U-shaped first partition wall 5a protrudes from one end of the front surface of the body 1a in the longitudinal direction. The first partition wall 5b is provided at the center of the inside of the first partition wall 5a. The inside of the partition wall 5a is divided into two. Furthermore, substantially J-shaped third and fourth partition walls 5c and 5d project from the end of the second partition wall 5b along the longitudinal direction of the body 1a. The ground side blade receiving spring block 10 is stored in the first storage space 6a surrounded by the first to third partition walls 5a to 5c, and the first, second and fourth partition walls 5a, 5b, The voltage side blade receiving spring block 20 is stored in the second storage space 6b surrounded by 5d. Furthermore, one grounding electrode blade receiving spring 31 and the bridging piece 32 of the grounding electrode blade receiving spring block 30 are stored in the third storage space 6c sandwiched between the third and fourth partition walls 5c and 5d. It should be noted that the ground side terminal plate 12 and the voltage side terminal plate 22 are respectively placed between both ends of the first partition wall 5a and the end portions of the third and fourth partition walls 5c and 5d. The base parts 7 and 8 are projected.
[0018]
The first and second base parts 7 and 8 are press-fitted in a substantially T-shape in plan view in which projecting pieces 14, 14, 24 and 24 provided on the ground-side terminal plate 12 and the voltage-side terminal plate 22 are press-fitted, respectively. Grooves 7a and 8a, insertion holes 7b and 8b through which terminal screws 40 screwed into the screw holes 12a and 22a of both terminal plates 12 and 22 are inserted, and formed at substantially the center of the edge of both terminal plates 12 and 22 Protrusions 7c and 8c that engage with the cutout portions 15 and 25 are provided, respectively. Thus, the first and second protrusions 14, 14, 24, 24 of both terminal plates 12, 22 are press-fitted into the press-fitting grooves 7 a, 8 a and the notches 15, 25 are engaged with the protrusions 7 c, 8 c. Positioning and fixing of the ground side blade receiving spring block 10 and the voltage side blade receiving spring block 20 with respect to the two storage spaces 6a and 6b are performed.
[0019]
In addition, a third base portion 9 on which the ground electrode terminal plate 33 is placed protrudes in the vicinity of the opening end of the third storage space 6c. The third base portion 9 is threaded into a substantially T-shaped press-fit groove 9a in a plan view and into which a projecting piece 33b protruding from the ground electrode terminal plate 33 is press-fitted, and a screw hole 33a of the ground electrode terminal plate 33. An insertion hole 9b through which the terminal screw 41 to be attached is inserted is provided. Further, a substantially T-shaped press-fitting groove 6d in a plan view is provided on the front surface of the body 1a in the third storage space 6c, into which the projecting piece 32a projecting from the bridging piece 32 is press-fitted. Thus, the projecting piece 32a of the bridging piece 32 is press-fitted into the press-fitting groove 6d, and the projecting pieces 33b of the ground electrode terminal plate 33 are press-fitted into the press-fitting grooves 9a, respectively, so that the grounding electrode for the third storage space 6c is obtained. The blade receiving spring block 30 is positioned and fixed.
[0020]
By the way, a substantially prismatic mounting table 50 on which the ground wire connection terminal plate 35 is mounted is protruded from the front end of the front surface of the body 1a (the end on the third platform 9 side). Yes. On the front surface of the mounting table 50, press-fitting holes 51, 51 having a substantially T shape in plan view into which press-fitting pieces 35 b, 35 b formed by bending on the ground wire connection terminal plate 35 are press-fitted, and a ground wire connection terminal plate 35 are provided. An insertion hole 52 through which the terminal screw 42 screwed into the screw hole 35a is inserted is provided. Thus, the ground wire connection terminal plate 35 is fixed to the mounting table 50 by press-fitting the press-fitting pieces 35 b and 35 b of the ground wire connection terminal plate 35 into the press-fitting holes 51 and 51. Here, in a state where the ground wire connection terminal plate 35 is placed on the front surface of the mounting table 50, the pair of ground terminal pieces 37, 37 formed on the ground wire connection terminal plate 35 are inclined toward the tip. However, it stands up in a direction away from the front surface of the mounting table 50.
[0021]
Meanwhile, screw insertion holes 60 through which mounting screws for attaching the body 1a to a construction surface such as a wall surface are inserted are provided at the four corners of the body 1a so as to penetrate from the front surface to the back surface. Further, a pair of wire insertion ports 61 for inserting wires connected to the ground side and voltage side terminal portions and the feed wiring terminal portions are provided on both sides of the first and second base portions 7 and 8, respectively. It is provided. Furthermore, a screw hole 62 into which the assembly screw 2 is screwed is provided in the third storage space 6c of the body 1a (see FIG. 5).
[0022]
On the other hand, a step is formed at one end in the longitudinal direction of the cover 1b facing the mounting table 50 so that the contact insertion port 4a... Opens backward from the front surface of the cover 1b. An opening 54 is formed to expose 50 to the front surface of the cover 1b. The step portions 55 and 55 located on both sides of the opening 54 along the short width direction of the cover 1b are respectively connected to the body of the mounting table 50 in a state where the body 1a and the cover 1b are coupled with the assembly screws 2 and the housing 1 is assembled. 1a Covers the front surface of the screw insertion holes 60, 60 located on both sides in the short width direction, and abuts against the side surface of the mounting table 50. Furthermore, when the housing 1 is assembled, the edge of the opening 54 on the front surface side of the cover 1 b is in contact with the front surface end portion of the mounting table 50. A rib 56 protrudes in the vicinity of the opening 54 on the back surface of the cover 1b, and the rib 56 is fitted into the fitting groove 53 that is recessed in the side surface of the mounting table 50 on the third table 9 side. By doing so, the opening 54 and the mounting table 50 are positioned (see FIG. 1).
[0023]
Thus, in the assembled state of the housing 1, as shown in FIGS. 2 to 4, the ground wire connection terminal plate 35, the terminal screw 42, and the ground terminal pieces 37, 37 placed on the front surface of the mounting table 50. Only the exposed portion is exposed from the opening 54, and the charging portion such as the ground-side blade receiving spring block 10 accommodated in the housing 1 is not exposed from the housing 1.
[0024]
Here, a procedure for arranging the exposed outlet according to the present embodiment configured as described above on a construction surface such as a wall surface will be briefly described. First, the core wire of the electric wire (not shown) inserted from the electric wire insertion port 61 of the body 1a is connected to the ground side terminal plate 12 and the voltage side terminal plate 22 by the terminal screw 40. At this time, a ground wire (not shown) inserted from the wire insertion port 61 is similarly connected to the ground electrode terminal plate 33 by the terminal screw 41. In addition, when these electric wires and ground wires are wired inside the wall, the electric wire drawn out from the hole provided in the wall may be inserted into the electric wire insertion port 61 as it is from the back side of the body 1a. On the other hand, when the electric wire or the like is arranged along the wall surface, the electric wire is inserted into a hole formed by cutting an appropriate one of a plurality of thin-walled portions (so-called knockout portions) 57 provided on the side surface of the body 1a. What is necessary is just to insert in the electric wire insertion port 61 after passing through.
[0025]
When the connection of the electric wire or the like is completed, the body 1a is attached to the wall surface by mounting screws (not shown) inserted through screw insertion holes 60 provided in the four corners of the body 1a with the back surface of the body 1a in contact with the construction surface. Attach and fix to. Then, the housing 1 is assembled by covering the front surface of the body 1a with the cover 1b and connecting them with the assembly screw 2, and the exposed outlet is disposed on the wall surface. Here, when the wall surface is curved like a cylindrical surface, if the back surface of the housing 1 (body 1a) is flat, the body 1a may be broken when the mounting screw is tightened. Therefore, in the exposed outlet of the present embodiment, a recess 58 that is recessed toward the front side with a step on the inner side is formed with respect to both longitudinal ends of the back side of the body 1a. That is, since the recess 58 is formed with a step on the back surface of the body 1a, there is an advantage that the body 1a is difficult to break even when the body 1a is attached to a curved construction surface such as a cylindrical surface.
[0026]
According to the present embodiment configured as described above, since the ground wire connecting portion 34 for connecting an external ground wire is exposed on the front surface of the housing 1, the body 1a and the cover 1b are joined to each other to form the housing. 1 is assembled, the ground wire can be connected to the ground wire connecting portion 34, and the ground wire connecting terminal plate 35 is provided with the ground terminal pieces 37, 37. It becomes possible to connect easily. Further, since the ground wire connection portion 34 is placed on the front surface of the mounting table 50 protruding from the front surface of the body 1a, the ground wire connection portion 34 is separated from the construction surface to which the housing 1 is attached, thereby There is an advantage that the connection is easy.
[0027]
In this embodiment, two sets of three contact insertion holes 4a, 4b, and 4c are provided on the front surface of the housing 1. However, the present invention is not limited to this, and one set of three contact insertion holes. One set or three or more sets of 4a, 4b, and 4c may be provided on the front surface of the housing 1. In addition, each contact insertion port 4a, 4b, 4c is formed in a substantially arc shape, and each blade receiving spring 11, 21, 31 is provided with an engaging means that engages with the contact on the plug side to prevent the plug from coming off. A conventionally known retaining structure that can be used may be employed.
[0028]
【The invention's effect】
According to the first aspect of the present invention, there is provided a housing having a set of three contact insertion ports into which a voltage side contact, a ground side contact, and a ground pole contact are respectively inserted, and A voltage side blade receiving spring, a ground side blade receiving spring and a grounding electrode blade receiving spring electrically connected to each contact inserted from each contact insertion port, and these blade receiving springs are electrically connected to the outside. voltage side terminal section wire is connected, and the ground-side terminal section and the ground terminal part, and a ground wire connecting portion external ground wire are connected together to expose the front side of the housing, the back of the housing From the vicinity to the front side, a mounting table narrower than the width of the housing is erected so that the front surface of the mounting table is not positioned in front of the front surface of the housing, and a ground wire connection is arranged on the front surface of the mounting table. Installed and inclined toward the tip Since projecting from the grounding terminal piece to the edge of the ground wire connecting portion extending upright away from the front of the stage while, since to expose the ground wire connection portion to the front of the housing, the ground in the assembled housing In addition to being able to connect the wire to the ground wire connection portion, it is possible to easily connect a connection tool such as a hook clip to the ground terminal piece provided in the ground wire connection portion. In addition, by separating the ground wire connecting portion from the construction surface to which the housing is attached, there is an effect that the ground wire can be easily connected.
[0030]
According to the second aspect of the present invention, since the step is formed on the rear surface of the housing that becomes the mounting surface to the construction surface, even when the housing is attached to the construction surface that has become the cylindrical surface, the housing can be made difficult to break. effective.
[0031]
The invention according to claim 3 has an effect that the usability can be improved since the feed wiring terminal portion for feeding and wiring each separately from the voltage side terminal portion, the ground side terminal portion and the ground electrode terminal portion is provided.
[0032]
In the invention of claim 4 , since a plurality of sets of three contact insertion holes into which the contact on the voltage side, the contact on the ground side, and the contact on the ground electrode are inserted are provided on the front surface of the housing. There is an effect that a plurality of plugs can be connected to one exposed outlet and the usability is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of the present invention.
FIG. 2 is a front view of the above.
FIG. 3 is a side view of the above.
FIG. 4 is a side view of the above.
FIG. 5 is a front view with the cover removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 1a Body 1b Cover 4a-4c Contactor insertion port 34 Ground wire connection part 37 Grounding terminal piece 50 Mounting base 54 Opening part

Claims (4)

A housing in which a set of three contact insertion holes into which a voltage side contact, a ground side contact and a ground electrode contact are respectively inserted are provided on the front surface, and each contact insertion port is inserted into the housing. Voltage-side blade receiving springs, ground-side blade receiving springs, and grounding electrode blade receiving springs that are electrically connected to the contactors to be connected to each other, and these blade receiving springs are electrically connected to the external electric wires, respectively. A voltage side terminal portion, a ground side terminal portion, and a ground electrode terminal portion, and a ground wire connection portion that is exposed to the front side of the housing and connected to an external ground wire are connected to the housing from the rear side of the housing to the front side. A mounting table narrower than the width dimension of the mounting table is erected so that the front surface of the mounting table is not positioned in front of the front surface of the housing, and a ground wire connection portion is disposed on the front surface of the mounting table, and toward the tip. In front of the mounting table while tilting Exposure outlet, characterized in that it is projecting the ground terminal piece to the edge of the ground wire connecting portion extending upright away from. The exposed outlet according to claim 1 , wherein a step is formed on a back surface of the housing which is an attachment surface to the construction surface . 3. The exposed outlet according to claim 1, further comprising a feed wiring terminal portion for feeding and wiring separately from the voltage side terminal portion, the ground side terminal portion, and the ground electrode terminal portion . 2. A plurality of sets of three contact insertion holes into which a voltage side contact, a ground side contact, and a ground pole contact are respectively inserted are provided on the front surface of the housing. The exposed outlet according to 2 or 3 .

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