JP2008159279A - Electrical receptacle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical receptacle facilitating wiring of external electrical wires and earth wires to provide an easy wire connection work. <P>SOLUTION: A body 2 has, at both ends in the longitudinal direction, a terminal section housing chamber 10<SB>1</SB>housing an earth side charging electrode terminal, and a terminal section housing chamber 10<SB>2</SB>for housing an electric power side charging electrode terminal, respectively, and has, at the central portion in the longitudinal direction, an earth electrode housing chamber 8 for housing an earth electrode terminal. In each of the housing chambers 8, 10<SB>1</SB>, 10<SB>2</SB>, a pair of earth wire insertion holes 11, 11 and a pair of electrical wire insertion holes 12, 12 are juxtaposed along the longitudinal direction of the body 2. The plural electrical wire insertion holes 12 and the plural earth wire insertion holes 11 are juxtaposed along the longitudinal direction (right and left direction) of an outer casing 1 and not overlapped with respect to a direction (up and down direction) perpendicular to the longitudinal direction of the outer casing 1, which facilitates wiring of the external electrical wires and the earth wires to provide the easy wire connection work. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an outlet.

  Conventionally, as shown in FIGS. 20 and 21, an outlet having a laterally substantially rectangular parallelepiped shape and having an outer shell embedded in a construction surface in a state where the longitudinal direction is substantially coincided with the horizontal direction and the front surface is exposed. Is provided (for example, refer to Patent Document 1).

  As shown in FIGS. 20 and 21, this outlet includes a pair of charging electrode insertion ports 51 and 51 into which two blades of a charging electrode included in the plug are respectively inserted and a ground electrode included in the plug. Ground electrode insertion holes 52 into which blades are inserted are provided at both ends in the longitudinal direction of the front surface of the outer shell 50, and for a pair of charging electrodes that receive the blades of the charging electrodes inserted into the two pairs of charging electrode insertion ports 51. A blade holder (not shown) and a ground electrode blade holder (not shown) for receiving the blade of the ground electrode inserted into the ground electrode insertion port 52 are respectively housed at both ends in the longitudinal direction in the outer shell 50. A pair of charging electrode terminal portions (not shown) for electrically connecting a plurality of external electric wires to the pair of charging electrode blade receptacles are housed in the longitudinal center of the outer shell 50, and the ground electrode blade For grounding electrodes that electrically connect multiple grounding wires to the receiver A child part (not shown) is housed in the longitudinal center of the outer shell 50, and a plurality of wire insertion holes 53 into which a plurality of external wires are inserted and a plurality of ground wire insertions into which a plurality of ground wires are respectively inserted. A hole 54 is provided at a substantially center in the longitudinal direction on the rear surface of the outer shell 50.

As shown in FIG. 21, the outlet is embedded and placed so that the rear end portion of the outer shell 50 is housed in the embedded box 200 embedded in the wall surface. A pair of conduits 201, 201 are connected to the embedded box 200, and an external wire 110 and a ground wire 120 connected to a distribution board or other wiring device are inserted into one conduit 201, and the other An external electric wire 110 and a grounding wire 120 are inserted into the electric pipe 201 for sending and wiring to other wiring devices. When connecting the plurality of external electric wires 110 and the ground wire 120 to an outlet, the pair of external electric wires 110 drawn from one electric conduit 201 and the pair of external electric wires 110 drawn from the other electric conduit 201 are respectively inserted into the electric wires. Inserted into the holes 53 and connected to the pair of charging electrode terminals, the pair of ground wires 120 led out from the respective conduits 201 and 201 are inserted into the respective ground wire insertion holes 54 to be connected to the ground electrode terminals. Connected with the part.
JP 2006-66228 A

By the way, in the above-described conventional example, the plurality of electric wire insertion holes 53 and the ground wire insertion holes 54 are concentrated at the substantially center in the longitudinal direction on the rear surface of the outer shell 50 and are provided at positions overlapping in the direction orthogonal to the longitudinal direction of the outer shell 50. For this reason, as shown in FIG. 21B, it is difficult to route the external electric wire 110 and the ground wire 120 in the depth direction in the embedded box 200. Especially when using a thick external electric wire whose conductor is composed of a circular strand having a cross-sectional area of 5.5 mm ² , the external electric wire is harder to bend than when a thin external electric wire consisting of a single wire is used. Becomes even more difficult.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an outlet in which an external electric wire and a grounding wire can be easily routed and can be easily connected.

  In order to achieve the above object, the invention of claim 1 has a horizontally long, substantially rectangular parallelepiped shape, and is embedded in the construction surface with the longitudinal direction substantially coincided with the horizontal direction and the front surface exposed. In an outlet having an outer shell, a pair of charging electrode insertion ports into which the two blades of the charging electrode included in the plug are respectively inserted, and a ground electrode difference into which the blade of the ground electrode included in the plug is inserted A grounding hole is provided in the center of the front surface of the outer shell in the longitudinal direction and receives a pair of charging electrode blades inserted into a pair of charging electrode insertion holes and a grounding electrode inserted into a grounding electrode insertion port. A pair of grounding electrode blade receptacles that receive the electrode blades are accommodated in a substantially central portion in the longitudinal direction in the outer shell, and a plurality of external electric wires are electrically connected to the pair of charging electrode blade receptacles, respectively. Is housed at both ends in the longitudinal direction in the outer shell, A grounding electrode terminal portion for electrically connecting a plurality of grounding wires to the blade holder is housed at a substantially longitudinal center in the outer shell, and a plurality of electric wire insertion holes into which a plurality of external electric wires are respectively inserted are rear surfaces of the outer shell. A plurality of ground wire insertion holes are provided at both ends in the longitudinal direction, and a plurality of ground wire insertion holes are inserted in the longitudinal center of the outer rear surface of the outer shell. It arrange | positions so that it may not be overlapped in the direction which is located in a line and is orthogonal to the longitudinal direction of an outline.

  According to a second aspect of the invention, in the first aspect of the invention, the pair of charging electrode terminal portions are formed integrally with the charging electrode blade holder by processing a conductive plate material, and an electric wire is inserted. A plurality of lock springs for holding and locking the conductors of the external electric wires inserted into the holes between the terminal plates and the locks of the plurality of lock springs are released by being operated from outside the outer shell. A pair of terminal plates each having a release button and integrally formed with the charging electrode blade holder are arranged rotationally symmetrically with respect to the approximate center in the longitudinal direction of the outer shell.

  According to a third aspect of the present invention, in the second aspect of the present invention, the pair of charging electrode blade receivers are arranged to face each other in the thickness direction so that the front end side can be bent, and elastically sandwich the charging electrode blade of the plug. There are a pair of blade receiving springs, and the same type of the pair of blade receiving springs is the same of the two types, the facing direction of the pair of blade receiving springs being substantially parallel to the longitudinal direction of the outer shell and the facing direction being substantially orthogonal to the longitudinal direction. Two or each type is housed in the outline one by one.

  According to a fourth aspect of the present invention, in the second aspect of the invention, the pair of charging electrode blade holders are arranged to face each other in the thickness direction so that the front end side can be bent, and elastically sandwich the charging electrode blade of the plug. A pair of blade receiving springs and another blade receiving spring that faces the side edge of the pair of blade receiving springs and elastically holds the blade of the charging electrode of the insertion plug between the side edge. And is housed in the outer shell so that the opposing direction of the pair of blade receiving springs is substantially parallel to the longitudinal direction of the outer shell.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, characterized in that a contact portion that contacts the lock spring along the direction of insertion of the external wire into the wire insertion hole is provided on the outer shell. And

  The invention of claim 6 is characterized in that, in the invention of claim 5, a recess facing the wire insertion hole along the insertion direction of the external wire is provided in the front wall inside the outer shell.

  The invention of claim 7 is the invention according to any one of claims 2 to 4, wherein the terminal plate is provided with an abutting portion that abuts the lock spring along the direction of insertion of the external electric wire into the electric wire insertion hole. Features.

  According to an eighth aspect of the present invention, in the second aspect of the present invention, the terminal plate includes a support piece that supports the lock spring in a direction orthogonal to the insertion direction of the external electric wire, and a lock spring in the direction orthogonal to the insertion direction of the external electric wire. It is characterized in that it has a resilient contact piece with which the conductor of the external electric wire is elastically contacted, and the knurling process is performed on the mutually opposing surfaces of the support piece and the elastic contact piece.

  The invention according to claim 9 is the invention according to claim 3 or 4, wherein the blade receiving spring is formed by bending a strip-shaped metal plate having conductivity, and is at least one of the parts to be bent. A protrusion is formed on the portion.

  According to the first aspect of the present invention, since the plurality of electric wire insertion holes and the grounding wire insertion holes are arranged so as not to overlap in the direction perpendicular to the longitudinal direction of the outer shell and arranged along the longitudinal direction of the outer shell, Compared to a configuration in which a plurality of wire insertion holes and grounding wire insertion holes are concentrated in the center in the longitudinal direction on the rear surface of the outer shell and overlapped in a direction perpendicular to the longitudinal direction of the outer shell as in the example, The ground wire can be easily routed and the connection work can be easily performed.

  According to the invention of claim 2, the pair of terminal plates that respectively constitute the charging electrode terminal portions are formed integrally with the charging electrode blade holder and are arranged rotationally symmetrically with respect to the approximate center in the longitudinal direction of the outer shell. Therefore, the cost can be reduced by sharing the parts.

  According to a third aspect of the present invention, the pair of charging electrode blade holders are arranged in opposition to each other in the thickness direction so that the front end side thereof can be freely bent, and elastically sandwich the charging electrode blades of the plugs. Two of the same type or two of the two types, one in which the opposing direction of the pair of blade receiving springs is substantially parallel to the longitudinal direction of the outer shell and the other in which the opposing direction is substantially orthogonal to the longitudinal direction, or Since the types are housed one by one in the outer shell, the charging electrode blade holder and the charging electrode terminal portion can be used in common among a plurality of types of outlets having different pole arrangements, thereby reducing costs.

  According to the fourth aspect of the present invention, the pair of charging electrode blade receivers are arranged to face each other in the thickness direction so that the front end side is freely bent, and the pair of blade receiving springs elastically pinches the charging electrode blades of the insertion plug. And a pair of blade receiving springs that oppose the side edges of the pair of blade receiving springs and elastically sandwich the blade of the charging electrode of the insertion plug between the side edges. The blade receiving spring is housed in the outer shell so that the opposing direction of the blade receiving spring is substantially parallel to the longitudinal direction of the outer shell. Can be used in common, so that the cost can be reduced and a plurality of types of plugs with different pole arrangements can be handled.

  According to the invention of claim 5, since the contact portion that contacts the lock spring along the direction of external wire insertion into the wire insertion hole is provided on the outer shell, the movement of the lock spring along the direction of insertion of the external wire It is possible to reliably connect the external electric wires.

  According to the invention of claim 6, since the recess facing the electric wire insertion hole along the insertion direction of the external electric wire is provided in the front wall inside the outer shell, the conductor of the external electric wire is longer than a necessary and sufficient length. Even when it is inserted into the conductor, it is possible to prevent contact with the other charging electrode terminal portion by letting the tip of the conductor escape into the recess.

  According to the seventh aspect of the present invention, since the terminal plate is provided with the contact portion that comes into contact with the lock spring along the external wire insertion direction into the wire insertion hole, the lock spring moves along the external wire insertion direction. It is possible to reliably connect the external electric wires.

  According to invention of Claim 8, since the knurling process is made to the mutually opposing surface of the support piece and elastic contact piece which comprise a terminal board, while the contact stability of the conductor of an external electric wire and a terminal board improves. Even if the positions of the support piece and the elastic contact piece are exchanged, equivalent contact stability can be obtained.

  According to the invention of claim 9, the blade receiving spring is formed by bending a band-shaped metal plate having conductivity, and a protrusion is formed on at least a part of the bent portion. Therefore, the blade receiving spring is less likely to bend as compared with the case where there is no protrusion, and the insertion / extraction force can be obtained stably.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
The outlet according to the present embodiment is a two-pole grounded embedded outlet having a pole arrangement with a rating of 15A and 125V. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 1A, and the upper surface in FIG. 1B is referred to as the front surface and the lower surface is referred to as the rear surface.

  FIG. 2 is an exploded perspective view showing the outlet of the present embodiment, and the outer shell 1 is formed by connecting a synthetic resin body 2 and a cover 3 with a metal assembly frame 4 for an embedded wiring apparatus. Is formed into a size (referred to as three module dimensions) of three wiring appliances of unit dimensions that can be attached to a series of mounting frames that have been standardized (Japanese Industrial Standard etc.).

  The body 2 is formed in a horizontally long substantially box-like shape with an open front surface, and a bulging portion 5 bulging outward in the downward direction is provided at the center of the lower side surface along the longitudinal direction. Protrusions 6 project from the front edges near both ends.

As shown in FIGS. 2 and 4, the inside of the body 2 is divided into approximately five sections by a plurality of partition walls 7 _{1 to} 7 ₆ . That is, substantially冂字shaped partition walls (first partition) 7 ₁ surrounding the inner of the bulge portion 5 from the upper direction is formed in the longitudinal center lower, longitudinal center and the body 2 on the side wall of the first partition wall 7 ₁ longitudinal center a flat partition walls (second partition wall) along the vertical direction of the body 2 between the 7 ₂ is formed, also mutually equal distances from the second partition wall 7 ₂ along the longitudinal direction of the body 2 of A pair of flat partition walls (third partition wall 7 ₃ , fourth partition wall 7 ₄ ) that are separated from each other are formed, and further, substantially rectangular-shaped partition walls (fifth partition walls 7) are respectively provided below the longitudinal ends of the body 2. ₅ and a sixth partition wall 7 ₆ ) are formed. Compartments surrounded by inner walls of the first partition ₇₁ and the bulging portion 5, the ground electrode containing chamber 8 to which the ground electrode blade receiving 21 and a ground electrode terminal portion to be described later is housed. The ₁ and the first partition wall 7 ₂ and the second partition wall 7 third compartment surrounded by the partition walls 7 _3, ground blade receiving storage chamber 9 becomes ₁ the charging electrode for a blade receiving 23 the ground side to be described later is housed, first partition 7 ₁ and the second partition wall 7 ₂ compartments surrounded by the fourth partition wall 7 ₄ at the power supply side blade receiving storage chamber 9 ₂ charging electrode blade receiving 23 described later power supply side is accommodated. Furthermore, the upper and left inner wall and the third partition wall 7 ₃ of the body 2 the fifth partition wall 7 ₅ compartment surrounded by the ground-side terminal portion housing chambers terminal unit charging electrode on the ground side to be described later is housed 10 _1, and the upper and right inner wall and fourth partition wall of the body 2 7 ₄ a section surrounded by the sixth partition 7 _6, the power supply side terminal portion housing chambers terminal unit charging electrode described later power supply side is accommodated 10 ₂ .

A rear wall of the bulging portion 5 in the ground electrode storage chamber 8 has a substantially oval operation hole 8a along the longitudinal direction of the body 2 and a pair of ground wire insertion holes 11 located on the left and right sides of the operation hole 8a. 11 penetrates. In addition, the rear wall of each of the terminal-side storage chambers 10 ₁ and 10 ₂ on the ground side and the power source side also has a substantially oval operation hole 10a along the longitudinal direction of the body 2 and a pair positioned on both the left and right sides of the operation hole 10a. The electric wire insertion holes 12 and 12 pass through. However, the inner diameters of the wire insertion holes 12 and 12 are larger than the inner diameters of the ground wire insertion holes 11 and 11 in order to correspond to external wires whose conductors are stranded as will be described later.

  On the other hand, the cover 3 is formed in a horizontally long substantially box-like shape with an open rear surface, and a projecting portion 14 projecting downward is provided at the center of the upper side wall along the longitudinal direction to close the front surface of the bulging portion 5 of the body 2. Further, convex portions 15, 15 project from the rear edges near both longitudinal ends of the upper and lower side surfaces at positions facing the convex portions 6, 6 of the body 2. In addition, a plug (not shown) having a two-pole plug with a rating of 15A or 125V or a plug with a two-pole grounding electrode having a rating of 15A or 125V is provided in the longitudinal center of the front surface of the cover 3 (that is, the front surface of the outer shell 1). A pair of charging electrode insertion holes 16a and 16b into which the two blades of the charging electrode are respectively inserted, and a grounding electrode provided with the plug (a plug with a two-pole grounding electrode with a rating of 15A and 125V). And a grounding electrode insertion port 17 into which the blade is inserted. The pair of charging electrode insertion ports 16a, 16b are rectangular holes that are long in the vertical direction, and the charging electrode insertion port 16b into which the power supply side blade is inserted is connected to the charging electrode insertion port 16b. The length in the longitudinal direction (vertical direction) of the insertion port 16a is increased. Further, the grounding electrode insertion port 17 into which the grounding electrode blade is inserted is formed in a substantially semicircular shape.

  The assembly frame 4 has an elongated plate shape, both end portions in the longitudinal direction are bent obliquely rearward, and the center portion is side pieces 18 and 18 placed on the overhanging portion 14 and the convex portion 15 of the cover 3. And the connecting pieces 19 and 19 for connecting the end portions of the side pieces 18 and 18 in the longitudinal direction, respectively, are formed in a square frame shape, and each side piece 18 has a U-shape protruding rearward on both sides in the longitudinal direction. A pair of protruding pieces 20 are provided. Thus, when the body 2 and the cover 3 are coupled, the assembly frame 4 is put on the cover 3 from the front side with the cover 3 placed on the front surface of the body 2, and the side piece 18 of the assembly frame 4 is placed. , 18 are placed on the overhanging portion 14 and the projecting portion 15, the projecting portions 6 and 15 of the body 2 and the cover 3 are inserted inside the protruding piece 20 of the assembly frame 4. At this time, the projection 18a protruding from the inner edge of the side piece 18 is engaged with the positioning recess 15a provided in the projection 15 of the cover 3, whereby the assembly frame 4 is positioned with respect to the cover 3 (FIG. 1). (See (a)). Then, the body piece 2 and the cover 3 are joined by the assembly frame 4 and the outer shell 1 is assembled by bending the center piece of the protruding piece 20 forward and engaging with the concave portion 6a on the rear surface of the convex portion 6. Further, as shown in FIG. 5, mounting claws 18b and 18b that lock into mounting holes (not shown) provided in the plate frame 100 project from the outer edges of the side pieces 18 and 18 of the assembly frame 4. The outer claw 1 can be attached to the plate frame 100 by locking the mounting claws 18 b in the mounting holes of the plate frame 100.

  The terminal portion for the ground electrode includes a terminal plate 22 formed integrally with the ground electrode blade holder 21 by processing a conductive plate material, and a conductor of the ground wire inserted into the ground wire insertion hole 11 as a terminal plate. The two lock springs 40, 40 that are sandwiched and locked between the two lock springs 22 and the release that releases the lock state of the two lock springs 40, 40 by being operated from outside the outer shell 1 through the operation hole 8a. It consists of a so-called screwless terminal (fast connection terminal) having a button 41. The grounding electrode blade receiver 21 is composed of a pair of blade receiving springs 21a and 21a which are arranged to face each other in the thickness direction so that the front end side can be flexed and elastically hold the blade of the grounding electrode of the insertion plug.

  The lock spring 40 has a contact piece 40a formed by bending one end of a belt-shaped leaf spring into an S shape, and a lock piece 40b formed by bending the other end into a J shape. It is formed in the shape which connected between 40a and the locking piece 40b continuously and integrally by the connection piece 40c. Here, the contact piece 40a and the locking piece 40b protrude on the same side in the thickness direction with respect to the connection piece 40c, and the distal ends of the contact piece 40a and the locking piece 40b are separated from the connection piece 40c toward the distal end side. And are extended so as to be substantially parallel to each other. The terminal plate 22 includes a pair of support pieces 22a and 22a that support the connection pieces 40c and 40c of the lock springs 40 and 40 in contact with each other in the thickness direction, and the lock spring 40 with respect to the pair of support pieces 22a and 22a. , 40 and a pair of connecting pieces 22b, 22b facing each other, and a pair of supporting pieces 22a, 22a and a central piece 22c connected to the connecting pieces 22b, 22b on the front end side, the supporting pieces 22a, 22a The rear ends of the blade receiving springs 21a and 21a are connected to the rear ends. The ground electrode blade holder 21 and the terminal plate 22 are housed in the ground electrode storage chamber 8 together with the two lock springs 40, 40 and one release button 41. The terminal strip 22 is disposed on the upper side of the storage chamber 8, the terminal plate 22 is disposed on the lower side of the ground electrode storage chamber 8, and the connection piece 40c is disposed between the support piece 22a and the connection piece 22b facing each other in the vertical direction. The lock springs 40 and 40 are accommodated in the direction in which they are brought into contact with each other (see FIG. 4B).

  Therefore, when a ground wire (not shown) is inserted into the outer shell 1 through the ground wire insertion hole 11, the conductor of the ground wire is connected to the connection piece 22b of the terminal plate 22, the contact piece 40a of the lock spring 40, and the lock piece 40b. The ground wire conductor is elastically contacted with the connection piece 22b to be electrically connected to the terminal plate 22, and the leading edge of the locking piece 40b bites into the conductor so that the ground wire is not pulled out. Thus, the grounding wire can be connected by being held (prevented from coming off). In addition, a release button 41 is disposed between the pair of connection pieces 22 b and 22 b on the lower side of the ground electrode storage chamber 8. The release button 41 is made of a synthetic resin molded product, and is moved upward by being pushed by the tip of a tool such as a flat-blade screwdriver through the operation hole 8a, so that the locking pieces 40b, 40b of the pair of lock springs 40, 40 are conductive. The locked state can be released by simultaneously bending away from the ground and pulling it away from the conductor of the ground wire.

  On the other hand, the terminal portion for the charging electrode on the power supply side and the ground side is formed with a terminal plate 24 formed integrally with the charging electrode blade holder 23 by processing a conductive plate as shown in FIG. By operating from the outside of the outer shell 1 through the two lock springs 40, 40 that hold and lock the conductor of the external electric wire inserted into the hole 12 between the terminal plate 24 and the two lock springs 40, 40. It consists of a screwless terminal (fast connection terminal) having a release button 41 for releasing the locked state of the lock springs 40, 40. The charging electrode blade holder 23 is composed of a pair of blade receiving springs 23a and 23a that are disposed opposite to each other in the thickness direction so that the front end can be bent by bending a belt-shaped metal plate into a substantially inverted Ω shape. The However, the lock spring 40 and the release button 41 of the charging electrode terminal portion on the power supply side and the ground side are basically the same configuration as that of the terminal portion for the ground electrode, although there are some differences in shape and size. .

As shown in FIG. 3, the terminal plate 24 has a pair of strip-shaped terminal pieces 24a and 24a connected at the front end side to form a substantially H-shaped terminal member connected by a belt-like central piece 24b, The terminal piece 24a of the terminal member is connected to the rear end portion of the blade receiving spring 23a by a strip-shaped connecting piece 24c, so that it is formed integrally with the charging electrode blade receiving 23. Then, as shown in FIG. 4B, the charging electrode blade holders 23 and 23 are stored in the blade receiving storage chambers 9 ₁ and 9 ₂ , respectively, and the terminal plates 24 and 24 include the two lock springs 40 and 40 and one Along with the release button 41, it is stored in the terminal portion storage chambers 10 ₁ , 10 ₂ . Here, with respect to the charging electrode terminal portion of the ground side, the insertion groove 25a which connecting piece 24c is inserted is provided at a position facing the lower end of the fifth partition wall 7 ₅ of the third partition wall 7 _3, the power supply side for charging electrode terminal portion, the insertion groove 25b of the connecting piece 24c is inserted is provided in a position facing the upper end of the upper wall and the fourth barrier rib 7 ₃ of the body 2. Accordingly, the terminal plate 24 integrally formed with the charging electrode blade holder 23 is placed in any of the terminal-side storage chambers 10 ₁ and 10 ₂ on the ground side and the power source side in the direction in which the connecting piece 24c is inserted into the insertion groove 25a or 25b. Can be stored in a rotationally symmetrical manner (see FIG. 4B). That is, the terminal plates 24 and 24 in the two charging electrode terminal portions on the ground side and the power source side can be used in common for one type of component, and there is an advantage that the cost can be reduced by reducing the number of component types. Further, in the state of being accommodated in the terminal portion accommodating chambers 10 ₁ and 10 ₂ , the lock springs 40 and 40 are accommodated between the pair of terminal pieces 24a and 24a facing each other in the vertical direction, and the upper terminal piece 24a is It becomes a support piece that contacts and supports the connection piece 40c of the lock spring 40, and the lower terminal piece 24a becomes an elastic contact piece that holds the conductor of the external electric wire between the lock spring 40 and elastically contacts the conductor.

Thus, when an external electric wire is inserted into the outer shell 1 through the electric wire insertion hole 12, the conductor of the external electric wire is the elastic contact piece (lower terminal piece 24a) of the terminal plate 24, the contact piece 40a of the lock spring 40, and the lock. The conductor of the external electric wire is elastically contacted with the elastic contact piece (lower terminal piece 24a) and electrically connected to the terminal plate 24, and the leading edge of the locking piece 40b is the conductor. The external electric wire can be connected by being mechanically held (prevented from coming off) so that the external electric wire does not come off by biting into the wire. Further, a release button 41 is disposed between the pair of terminal pieces 24a, 24a on the lower side of the terminal portion storage chambers 10 ₁ , 10 ₂ , and the release button 41 is pushed by the tip of a tool such as a minus driver through the operation hole 10a. For example, the lock buttons 40b, 40b of the pair of lock springs 40, 40 can be simultaneously bent in the direction away from the conductor by the release button 41 moving upward, and can be released from the conductor of the external electric wire to release the locked state.

  By the way, the terminal plates 22 and 24 constituting the pair of charging electrode terminal portions and ground electrode terminal portions can be connected even when the conductor of the external electric wire or the ground wire is a stranded wire (for example, a circular stranded wire). Therefore, knurl processing is performed on the inner side surface (surface on which the conductor is elastically contacted) of the connection pieces 22b of the terminal plates 22 and 24 and the terminal piece 24a, thereby forming a knurl portion in which irregularities are alternately repeated along the conductor insertion direction. (See FIG. 2). By forming such a knurled part, it is possible to connect even a twisted wire with a diameter smaller than that of a single wire by increasing the frictional resistance against the conductor, and dirt on the surface of the conductor is uneven. Can be removed to some extent.

As shown in FIG. 5, the outlet according to the present embodiment configured as described above is attached to a plate frame 100 formed in a rectangular frame shape by a synthetic resin material and is embedded in a construction surface such as a wall surface. The plate frame 100 is screwed to the front surface of the embedding box 200 embedded in the wall by a box screw (not shown). A decorative plate 101 having a rectangular window hole (not shown) through which the front end of the outer shell 1 of the outlet is inserted is detachably attached to the plate frame 100 from the front. The embedding box 200 has a horizontally long and substantially rectangular parallelepiped shape with an open front surface, and conduits 201 and 201 are connected to both ends in the longitudinal direction on the lower surface. External conduits 110 and 110 connected to a distribution board or other wiring device (not shown) and a ground wire 120 are inserted into one conduit 201, and the other conduit 201 is sent to another wiring device for wiring. The external wires 110 and 110 and the ground wire 120 are inserted, and the plurality of external wires 110 and the ground wire 120 are connected to the charging electrode terminal portion and the ground electrode terminal portion of the outlet in the embedded box 200. (See FIG. 5). However, in the illustrated example, the external electric wire 110 that uses a conductor with a circular strand having a nominal cross-sectional area of 5.5 mm ² is used, and the grounding wire 120 that uses a single wire with a diameter smaller than that of the external electric wire 110 as a conductor. is doing.

Here, both longitudinal ends of the terminal portion housing chambers 10 ₂ and the body 2 for housing the charging electrode terminal portion of the terminal portion housing chambers 10 ₁ and the power supply side for accommodating the charging electrode terminal portion of the ground side in this embodiment The ground electrode storage chamber 8 for storing the ground electrode terminal portion is provided at the center in the longitudinal direction of the body ₂ , and a pair of ground wire insertion holes 11, 11 are provided in the storage chambers 8, 10 ₁ , 10 ₂ . In addition, since the pair of wire insertion holes 12 and 12 are arranged side by side along the longitudinal direction of the body 2, as shown in FIG. Are arranged so as not to overlap each other in a direction (vertical direction) perpendicular to the longitudinal direction of the outer shell 1. For this reason, as compared with a configuration in which a plurality of electric wire insertion holes and grounding wire insertion holes are concentrated in the center in the longitudinal direction on the rear surface of the outer shell and overlap in a direction perpendicular to the longitudinal direction of the outer shell as in the conventional example. Even when the conductor 111 uses a thick external electric wire 110 composed of a circular stranded wire having a cross-sectional area of 5.5 mm ² , the external electric wire 110 and the grounding wire 111 can be easily routed and connected easily.

(Embodiment 2)
The outlet according to the present embodiment is an embedded outlet with a two-pole grounding pole having a pole arrangement with a rating of 15A and 250V as shown in FIGS. However, since the body 2, the assembly frame 4, and the ground electrode terminal are the same as those in the first embodiment, the description thereof is omitted.

  The cover 3 has the same configuration as that of the cover 3 in the first embodiment except that the pair of charging electrode insertion ports 16a and 16b are rectangular holes that are long in the left-right direction. Further, the charging electrode terminal portion has a pair of blade receiving springs 23a, 23a facing in the vertical direction, the charging electrode blade receiving 23 is connected to the terminal plate 24, and the connecting piece 24c of the terminal plate 24 is substantially bowl-shaped. Except for the point bent to, it has the same configuration as the charging electrode terminal portion in the first embodiment.

Thus, also in the present embodiment, the terminal plate 24 integrally formed with the charging electrode blade holder 23 is housed in either the ground side or the power source side in the direction in which the connecting piece 24c is inserted into the insertion groove 25a or 25b. The chambers 10 ₁ and 10 ₂ can also be accommodated in a rotationally symmetrical manner, and the terminal plates 24 and 24 in the two charging electrode terminal portions on the ground side and the power source side can be used in common for one kind of component. it can.

(Embodiment 3)
The outlet according to the present embodiment is an embedded outlet with a two-pole grounding pole having a pole arrangement with a rating of 20A and 125V as shown in FIGS. However, since the body 2, the assembly frame 4, and the ground electrode terminal are the same as those in the first embodiment, the description thereof is omitted.

  The cover 3 is the same as that of the first embodiment except that the charging-side charging port 16a on the ground side is formed in a shape in which the right end of the rectangular hole that is long in the left-right direction is connected to the lower end of the rectangular hole that is long in the vertical direction. The cover 3 has a common configuration. Further, the charging electrode terminal portion on the ground side is the same as the charging electrode terminal portion in the second embodiment, and the charging electrode terminal portion on the power source side is the same as the charging electrode terminal portion in the first embodiment. is there.

  Thus, the present embodiment has an advantage that the manufacturing cost can be reduced because parts common to the first and second embodiments can be used except for the cover 3.

(Embodiment 4)
The outlet according to the present embodiment is an embedded outlet with a two-pole grounding pole having a pole arrangement with a rating of 20A and 250V as shown in FIGS. However, since the body 2, the assembly frame 4, and the ground electrode terminal are the same as those in the first embodiment, the description thereof is omitted.

  The cover 3 has the same configuration as that of the cover 3 in the first embodiment except that the charging electrode insertion port 16b on the power source side is a rectangular hole that is long in the left-right direction. In addition, the charging electrode terminal portion on the power source side is the same as the charging electrode terminal portion in the second embodiment, and the charging electrode terminal portion on the ground side is the same as the charging electrode terminal portion in the first embodiment. is there.

  Thus, the present embodiment has an advantage that the manufacturing cost can be reduced because parts common to the first and second embodiments can be used except for the cover 3. Also, as shown in FIGS. 12A and 12B, the grounding-side charging electrode insertion port 16a is a rectangular hole that is long in the left-right direction, and the power-supplying charging electrode insertion port 16b is a rectangular hole that is long in the vertical direction. When the cover 3 is used, a two-pole embedded outlet without a grounding pole having a pole arrangement with a rating of 20A and 250V can be configured. Further, as shown in FIGS. 12C and 12D, the charging electrode insertion port 16b on the power source side is a rectangular hole that is long in the left-right direction, and the charging electrode insertion port 16a on the ground side is a rectangular hole that is long in the vertical direction. If the cover 3 is used, an embedded outlet with a two-pole grounding pole having a pole arrangement with a rating of 20A and 250V can be configured.

(Embodiment 5)
The outlet of the present embodiment is an embedded outlet with a two-pole grounding pole having a pole arrangement with a rating of 15 A and 125 V as in the first embodiment, except for the configuration of the blade holder 23 for the charging pole as shown in FIG. Other configurations are the same as those in the first embodiment. Therefore, the same components are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 14, the charging electrode blade receiver 23 in the present embodiment includes a pair of blade receiving springs 23 a and 23 a facing in the vertical direction as in the second embodiment, and the side of the pair of blade receiving springs 23 a and 23 a. A blade receiving spring 23b that is opposed to the end edge in the left-right direction and elastically holds the blade of the charging electrode of the insertion plug between the side edge and is connected to the terminal plate 24 by a connecting piece 24c. Are integrally formed. Therefore, if the blade of the plug is in a pole arrangement with the thickness direction aligned with the vertical direction, it is elastically held by the pair of blade receiving springs 23a, 23a, and the blade of the plug has left and right in the thickness direction. If the pole arrangement is in the direction that matches the direction, the side edge of the pair of blade receiving springs 23a, 23a and the blade receiving spring 23b are elastically sandwiched, and the blade of the plug is substantially bowl-shaped (rated 20A, 250V), the pair of blade receiving springs 23a and 23a and the blade receiving spring 23b are elastically sandwiched. In addition, the terminal plate 24 integrally formed with the charging electrode blade holder 23 has the terminal portion storage chambers 10 ₁ and 10 ₂ on the ground side and the power source side in the direction in which the connecting piece 24c is inserted into the insertion groove 25a or 25b. Can also be stored in a rotationally symmetrical manner (see FIG. 15).

  Thus, the charging electrode blade holder 23 in the present embodiment can correspond to all the electrode arrangements described in the first to fourth embodiments, and the charging electrode blade holder 23 can be used in each of the plurality of types of electrode arrangements. 23 and the charging electrode terminal portion have the same configuration, and therefore, there is an advantage that it is only necessary to prepare a plurality of types of covers 3 having different shapes of the charging electrode insertion ports 16a and 16b. In addition to the pole arrangements exemplified in the first to fourth embodiments, as shown in FIG. 16 (a), the charging electrode insertion port 16a on the ground side has a longitudinal direction at the center of the rectangular hole whose longitudinal direction is the vertical direction. It is formed in a shape in which the ends of the rectangular holes in the left and right direction are connected, and the charging electrode insertion port 16b on the power source side is a rectangular hole with the longitudinal direction in the vertical direction, thereby providing a pole arrangement with a rating of 15A and 125V. An outlet that can be used for both pole arrangements of rated 20A and 125V can be provided. Further, as shown in FIG. 16 (b), the charging electrode insertion port 16b on the power source side is a rectangular hole whose longitudinal direction is the left-right direction. It is possible to provide an outlet that can be used for both the pole arrangement with the rating of 15A and 250V and the pole arrangement with the rating of 20A and 250V.

  By the way, in the charging electrode blade receiver 23, as shown in FIG. 17, a protrusion (dub) is formed at the root portion (the portion to be bent) of the blade receiving spring 23b facing the side edge of the pair of blade receiving springs 23a, 23a. Since 23c is formed, blade receiving springs 23a, 23a, and 23c are less likely to bend as compared with the case where there is no projection 23c, and there is an advantage that the insertion / extraction force of the plug can be obtained stably.

  In order to prevent the lock spring 40 from moving forward with the insertion of the conductor 111 of the external electric wire 110 when connecting the external electric wire to the charging electrode terminal portion, as shown in FIG. A contact portion 26 that contacts the lock spring 40 is provided on the rear surface side of the cover 3 along the insertion direction of 110 (upward in the same figure). Thereby, the movement of the lock spring 40 along the insertion direction of the external electric wire 110 can be prevented and the external electric wire 110 can be reliably connected. Furthermore, when the conductor 111 exposed from the external electric wire 110 is longer than the necessary and sufficient length, the conductor 111 may penetrate forward from the front end of the terminal piece 24a of the terminal plate 24, as shown in FIG. In addition, since a recess 27 is provided on the rear surface of the cover 3 so as to face the wire insertion hole 12, even when the conductor 111 of the external wire 110 is inserted longer than necessary, the tip of the conductor 111 is recessed. Occurrence of a problem such as contact with the other charging electrode terminal portion can be prevented by letting it escape into the location 27.

  However, instead of holding the lock spring 40 by the contact portion 26 provided on the cover 3, as shown in FIG. 19C, the central piece 24b of the terminal plate 24 is formed wide, and the lock spring 40 is formed on the central piece 24b. You may make it contact | abut. At this time, if the central piece 24b is opposed to the electric wire insertion hole 12 along the insertion direction of the external electric wire 110, the conductor 111 of the external electric wire 110 can be prevented from contacting the central piece 24b and being inserted deeper than necessary. Yes (see FIG. 19B).

1 shows Embodiment 1 of the present invention, where (a) is a front view, (b) is a bottom view, (c) is a rear view, and (d) is a right side view. It is an exploded perspective view same as the above. The terminal board which comprises the terminal part for charge electrodes in the same as the above, and the blade holder for charge electrodes are shown, (a) is a front view, (b) is a bottom view, (c) is a right view. (A) is a front view of the body in the above, and (b) is a front view in a state in which the cover and the assembly frame are removed. The construction state same as the above is shown, (a) is a cross-sectional view seen from the rear, and (b) is a cross-sectional view seen from the side. It is a disassembled perspective view which shows Embodiment 2 of this invention. The same as above, (a) is a front view, (b) is a rear view. It is a disassembled perspective view which shows Embodiment 3 of this invention. The same as above, (a) is a front view, (b) is a rear view. It is a disassembled perspective view which shows Embodiment 4 of this invention. The same as above, (a) is a front view, (b) is a rear view. (A) is a front view of another configuration in the above, (b) is a front view in a state where the cover and the assembly frame are removed, (c) is a front view of still another configuration in the above, and (d) is a cover and an assembly frame. It is a front view of the state which removed. It is a disassembled perspective view which shows Embodiment 5 of this invention. The terminal board which comprises the terminal part for charging electrodes in the same as the above, and the blade holder for charging electrodes are shown, (a) is a front view, (b) is the sectional view on the AA line of (a), (c) is ( FIG. 4A is a cross-sectional view taken along line B-B in FIG. 5A, and FIG. 4D is a cross-sectional view taken along line C-C in FIG. It is a front view of the state which removed the cover and assembly frame same as the above. (A) is a front view of the other structure in the same as the above, (b) is a front view of still another structure in the same as the above. It is principal part sectional drawing of the blade holder for charge electrodes in the same as the above. (A), (b) is principal part sectional drawing of the terminal part for charge electrodes in the same as the above. The other structure same as the above is shown, (a) is a front view, (b) is a right side view, and (c) is a front view with a cover and an assembly frame removed. It is a front view which shows a prior art example. The construction state same as the above is shown, (a) is a cross-sectional view seen from the rear, and (b) is a cross-sectional view seen from the side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outline 2 Body 3 Cover 4 Assembly frame 11 Ground wire insertion hole 12 Electric wire insertion hole

Claims (9)

In an outlet having a laterally substantially rectangular parallelepiped shape and having an outer shell embedded in the construction surface with the longitudinal direction substantially coincided with the horizontal direction and the front surface exposed.
A pair of charging electrode insertion holes into which the two blades of the charging electrode included in the insertion plug are respectively inserted and a grounding electrode insertion port into which the blade of the grounding electrode included in the insertion plug is inserted A grounding electrode that is provided in the center of the longitudinal direction and that receives a pair of charging electrode blade receptacles that are inserted into a pair of charging electrode insertion ports and a grounding electrode blade that is inserted into a grounding electrode insertion port. A pair of charging electrode terminal portions that are housed in a substantially central portion in the longitudinal direction in the outer shell and electrically connect a plurality of external electric wires to the pair of charging electrode blade brackets in the longitudinal direction in the outer shell A grounding electrode terminal portion that is housed at both ends and electrically connects a plurality of grounding wires to the grounding electrode blade holder is housed in the approximate center in the longitudinal direction in the outer shell, and a plurality of external electric wires are respectively inserted. Multiple wire insertion holes at both ends in the longitudinal direction on the outer rear surface Provided, a plurality of ground wire insertion hole in which a plurality of ground lines are respectively inserted are provided in the substantially longitudinal center of the outer rear surface,
The outlet, wherein the plurality of electric wire insertion holes and grounding wire insertion holes are arranged along the longitudinal direction of the outer shell so as not to overlap in a direction orthogonal to the longitudinal direction of the outer shell.   The pair of charging electrode terminal portions includes a terminal plate formed integrally with the charging electrode blade holder by processing a conductive plate material, and a conductor of the external wire inserted into the wire insertion hole. A plurality of lock springs that are respectively held and locked between each other, and a release button that releases the lock state of the plurality of lock springs when operated from outside the outer shell, The outlet according to claim 1, wherein the pair of terminal boards formed integrally are arranged rotationally symmetrically with respect to a substantially longitudinal center of the outer shell.   The pair of charging electrode blade holders have a pair of blade receiving springs that are opposed to each other in the thickness direction so that the front end side can be bent freely, and elastically hold the charging electrode blades of the plugs. Two of the same type are stored in the outer shell, or two of each type, one in which the opposing direction of the spring is substantially parallel to the longitudinal direction of the outer shell and that in which the opposing direction is substantially orthogonal to the longitudinal direction. The outlet according to claim 2, wherein the outlet is formed.   A pair of blade holders for charging electrodes are arranged to face each other in the thickness direction so that the front end side is bendable, and a pair of blade receiving springs elastically holding the blade of the charging electrode of the insertion plug, and the pair of blade receiving springs Another blade receiving spring that faces the side edge and elastically holds the blade of the charging electrode of the insertion plug between the side edge, and the opposing direction of the pair of blade receiving springs is the outline The outlet according to claim 2, wherein the outlet is housed in an outer shell so as to be substantially parallel to the longitudinal direction.   The outlet according to any one of claims 2 to 4, wherein an abutting portion that abuts against the lock spring along the direction of insertion of the external electric wire into the electric wire insertion hole is provided on the outer shell.   6. The outlet according to claim 5, wherein a recess facing the electric wire insertion hole is provided on the front wall inside the outer wall along the insertion direction of the external electric wire.   The outlet according to any one of claims 2 to 4, wherein the terminal plate is provided with an abutting portion that abuts against the lock spring along the direction in which the external electric wire is inserted into the electric wire insertion hole.   The terminal plate includes a support piece that supports the lock spring in a direction orthogonal to the insertion direction of the external electric wire, and a resilient contact piece that elastically contacts the conductor of the external wire by the lock spring in a direction orthogonal to the insertion direction of the external electric wire. The outlet according to claim 2, wherein knurling is performed on the opposing surfaces of the support piece and the elastic contact piece.   The blade receiving spring is formed by bending a conductive belt-shaped metal plate, and a protrusion is formed on at least a part of the bent portion. Or the outlet according to 4.

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