JP2007172889A - Wire connection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire connection device capable of connecting certainly by preventing the tip part of an external wire from being bent forcibly, by arranging so that it can be screwed in the insertion direction of the external wire. <P>SOLUTION: Since a terminal plate 12 is made to slant against an outside open face 7a (surface of a cover 3), the tip part of an outside grounding wire E is inserted smoothly without bending and can be screwed 13 to the terminal plate 12, thereby, an unnecessary bending force is not acted on the tip part of the external grounding wire E, and the grounding wire E can be by far more easily and certainly screwed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connection device for connecting an external electric wire inserted from the outside to an internal electric wire of an electric device.

A pair of plug blade insertion holes for the power supply and a plug blade insertion hole for the grounding electrode are provided as a pair as a conventional wall-mounted outlet, and a grounded internal ground (internal electric wire) is connected to the outlet. It is known that an earth terminal is provided, and an external electric wire (ground line) serving as an external earth wire is connected to the earth terminal. In such an outlet, an earth terminal is provided in a recess provided on the front surface of the outlet cover, and the external electric wire inserted into the recess is screwed to a terminal plate of the earth terminal (for example, a patent) Reference 1).
Japanese Patent Laid-Open No. 9-147992 (page 3, FIG. 1, FIG. 3)

  In the conventional ground terminal, when the external electric wire of the external ground wire is screwed to the terminal plate, the external electric wire is inserted along the side wall of the recess that is inclined inward, and then parallel to the front surface of the cover. It will be screwed to the terminal board (holding plate).

  In this case, a U-shaped flat crimp terminal that is inserted so as to sandwich the outer periphery of the screw is provided at the tip of the external electric wire. When the external electric wire is connected to the ground terminal, the external electric wire is recessed. After tilting along the side wall, the tip is bent in the direction along the terminal plate and screwed.

  For this reason, it is necessary for the external electric wire to be clamped with screws so that the flat crimping terminal at the tip is forcibly bent. At this time, the screwing tends to be incomplete due to the spring force when the flat crimping terminal is bent. As a result, there was a risk of causing poor contact.

  Accordingly, an object of the present invention is to provide a connection device that enables more reliable connection by allowing the external electric wire to be screwed in the insertion direction and suppressing the forcible bending of the distal end portion of the external electric wire. It is what.

  According to the first aspect of the present invention, a container body having an electric wire insertion port for inserting an external electric wire to be connected to form an outer shell of an electric device, and a base that is housed inside the container body and connects the internal electric wire Part, a terminal plate that is provided in the base part and is provided at a position lower than the outer open surface of the wire insertion port in the body, and that contacts the inserted external electric wire, and is screwed to the terminal plate and A connection device comprising a screw for fixing an external electric wire to a terminal plate, wherein the terminal plate is inclined with respect to a general portion of the outer surface of the vessel body.

  In the invention of claim 2, a container body having an electric wire insertion port for inserting an external electric wire to be connected by forming an outer shell of an electric device, and a base which is housed in the container body and connects the internal electric wire Part, a terminal plate that is provided in the base part and is provided at a position lower than the outer open surface of the wire insertion port in the body, and that contacts the inserted external electric wire, and is screwed to the terminal plate and A connection device comprising a screw for fixing an external electric wire to a terminal plate, wherein the terminal plate is formed by lifting from the base portion so as to be positioned in the vicinity of the outer open surface of the electric wire insertion port. .

  According to a third aspect of the present invention, in the first or second aspect of the present invention, an extended portion that protrudes from the wire insertion port and contacts the frame of the container body is provided at the tip of the terminal plate. And

  According to the first aspect of the present invention, since the terminal plate is disposed to be inclined with respect to the general portion of the outer surface of the vessel body, the external electric wire inserted from the electric wire insertion port is inserted obliquely along the terminal plate. It is possible to smoothly insert and screw it without bending its tip. For this reason, an excessive bending force does not act on the front-end | tip part of an external electric wire, and it can be screwed now more easily and more reliably.

  According to the invention of claim 2, since the terminal plate is arranged in the vicinity of the outer open surface of the electric wire insertion port so as to be lifted from the base portion, the external electric wire inserted from the electric wire insertion port is connected to the outer side of the electric wire insertion port. By simply inserting along the open surface, it can be substantially along the terminal board, and can be screwed without bending the tip. For this reason, an excessive bending force does not act on the front-end | tip part of an external electric wire, and it can be screwed now more easily and more reliably.

  According to the invention of claim 3, in addition to the effects of claims 1 and 2, the extended portion provided at the tip of the terminal plate protrudes from the wire insertion port and is brought into contact with the frame of the vessel body. The frame potential can be maintained at the ground level.

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

  (First Embodiment) FIGS. 1 to 5 show a first embodiment of a connection device according to the present invention, FIG. 1 is a perspective view of a main part of an outlet provided with the connection device of the present invention, and FIG. 1 is an exploded perspective view of the outlet connection device and its storage portion as viewed from the direction α in FIG. 1, FIG. 3 is an exploded perspective view of the main portion of the connection device as viewed from the direction β in FIG. 1, and FIG. FIG. 5 is a perspective view showing the assembled state of the main part, and FIG. 5 is an enlarged cross-sectional view of the main part along the line AA in FIG.

  In the present embodiment, as shown in FIG. 1, an example of an outlet 1 as an electrical device having a built-in earth terminal 10 as a connection device will be described.

  The outlet 1 is embedded in a wall surface, and a synthetic resin body 2 (see FIG. 2) and a cover 3 that form an outer shell of the outlet 1 are joined together by a metal frame 4 so as to be entirely. The container 5 is formed in a rectangular parallelepiped shape, and the outlet 1 is attached to a wall box or the like formed on the wall surface by the frame 4.

  The cover 3 is provided with a pair of plug insertion ports 6 including a pair of plug blade insertion ports 6a and 6b and a grounding electrode plug blade insertion port 6c, and an external ground wire E (see FIG. 1) is inserted, and a ground terminal 10 (see FIG. 4) for connecting the external ground wire E is accommodated in the body 5 corresponding to the wire insertion slot 7.

  As shown in FIGS. 2 to 4, the ground terminal 10 is connected to a base portion 11 for connecting an internal ground wire as an internal electric wire, and an external ground wire E provided on the base portion 11 and inserted from the electric wire insertion port 7. The terminal board 12 which contacts is comprised, and the screw 13 screwed together by this terminal board 12 and fixing the external earth wire E to the terminal board 12 is comprised.

  As shown in FIGS. 2 and 3, the base portion 11 includes a lock spring 14 bent in a U shape, an internal terminal plate 15 facing the free end 14 a of the lock spring 14, and the free springs of these lock springs 14. A pair of internal ground connection portions 17 each including a release lever 16 that widens the distance between the end 14a and the internal terminal plate 15 are provided on the left and right. Here, the upper end portions of the lock spring 14 and the terminal plate 15 are connected to each other, and the left and right internal ground connection portions 17 are connected via a connection portion 18.

  Then, an internal ground wire (not shown) is sandwiched between the free end 14 a of the lock spring 14 and the internal terminal plate 15, and when the internal ground wire is detached, the release lever 16 is pushed in to push the free end 14 a of the lock spring 14. And the internal terminal board 15 are widened.

  The terminal plate 12 is cut and raised from the connecting portion 18 of the base portion 11 so as to be entirely flat, and the screw 13 is screwed into a screw hole 12a formed in the central portion thereof. A washer 19 is interposed between the terminal plate 12 and the head 13 a of the screw 13.

  The external ground wire E inserted from the wire insertion port 7 is sandwiched between the terminal plate 12 and the washer 19, and the screw 13 is tightened to fix the external ground wire E to the terminal plate 12. At this time, a U-shaped flat crimp terminal Et is coupled to the distal end portion of the external ground wire E, and the U-shaped portion of the flat crimp terminal Et is fitted so as to sandwich the screw 13.

  Further, as shown in FIG. 2, the outward opening surface 7 a of the wire insertion port 7 formed in the cover 3 is covered with a ground door 8 so as to be freely opened and closed. The terminal plate 12 is provided at a position lower than the outer open surface 7 a of the electric wire insertion port 7 on the inside of the container body 5 so that the fastening portion can be covered with the ground door 8.

  Here, in the present embodiment, as shown in FIG. 5, the general portion 3 a (outside surface) of the outer surface of the cover 3 is arranged so that the terminal plate 12 extends along the insertion direction of the external ground wire E inserted from the wire insertion port 7. It is inclined with respect to the direction opening surface 7a).

  In other words, the terminal plate 12 is raised and raised at a predetermined angle (θ in the drawing) with the cut-and-raised side as a free end portion in the direction of the end of the container 5 of the connecting portion 18 of the base portion 11. Of course, by tilting the terminal plate 12 in this manner, the screw 13 screwed into the terminal plate 12 is also tilted in the direction perpendicular to the terminal plate 12.

  Moreover, in this embodiment, the extending part 20 which protrudes from the electric wire insertion port 7 and contacts the frame 4 of the container body 5 is provided at the tip part of the terminal plate 12.

  That is, as shown in FIG. 5, the extended portion 20 is bent so as to be disposed along the outside of the cover 3 over the periphery of the wire insertion port 7 from the tip portion of the terminal plate 12. It is in contact with the frame 4.

  With the above configuration, according to the ground terminal 10 of the present embodiment, when the external ground wire E inserted from the wire insertion port 7 is screwed to the terminal plate 12, the terminal plate 12 is attached to the outer open surface 7a. The U-shaped flat crimp terminal Et coupled to the tip of the external ground wire E is smoothly inserted without being bent excessively, and the U-shaped portion of the flat crimp terminal Et Can be fitted to the screw 13 and stopped. For this reason, since an excessive bending force does not act on the front-end | tip part of the external earth wire E, the external earth wire E can be screwed 13 more easily and more reliably.

  Further, since the extended portion 20 provided at the distal end portion of the terminal plate 12 is protruded from the wire insertion port 7 and brought into contact with the frame 4 of the container body 5 and the frame 4 is connected to the ground, some unexpected situation occurs. Even if it occurs, the potential of the frame 4 can be maintained at the ground level.

  (Second Embodiment) FIGS. 6 and 7 show a second embodiment of the present invention, in which the same components as those in the first embodiment are denoted by the same reference numerals and redundant description is omitted. To do. FIG. 6 is an exploded perspective view showing the main part of the connection device, and FIG. 7 is an enlarged cross-sectional view of the main part corresponding to the line AA in FIG.

  An earth terminal 10A as a connection device of the present embodiment basically has the same configuration as that of the first embodiment. That is, as shown in FIGS. 6 and 7, a base portion 11 for connecting the internal ground wire, a terminal plate 12 provided on the base portion 11 and in contact with the external ground wire E inserted from the wire insertion port 7, And a screw 13 that is screwed to the terminal plate 12 and fixes the external ground wire E to the terminal plate 12.

  In addition, as shown in FIG. 6, the lock spring 14 of the base part 11 of this embodiment has the spring part 14b and the holding part 14c of this spring part 14b formed separately, but as shown in FIG. By coupling the spring portion 14b and the holding portion 14c, an internal ground wire (not shown) can be clamped as in the first embodiment.

  However, in the present embodiment, the terminal plate 12 is lifted by a predetermined amount H from the base portion 11 so as to be positioned in the vicinity of the outer open surface 7a of the wire insertion port 7.

  Further, even in the present embodiment, similarly to the first embodiment, an extended portion 20A that protrudes from the wire insertion port 7 and contacts the frame 4 (see FIG. 1) of the container body 5 is provided at the tip of the terminal plate 12. It is provided.

  With the above configuration, according to the ground terminal 10 </ b> A of the present embodiment, the terminal plate 12 is lifted from the base portion 11 so as to be positioned in the vicinity of the outer open surface 7 a of the wire insertion port 7. By inserting the inserted external ground wire E along the outward open surface 7a of the wire insertion port 7 (that is, in the direction along the surface of the cover 3), the external ground wire E is inevitably omitted from the terminal plate 12. The direction is along.

  Accordingly, the external ground wire E can be smoothly inserted without bending the tip portion. For this reason, an excessive bending force does not act on the tip portion of the external ground wire E, and the external ground wire E is more easily connected. And the screw 13 can be more reliably fixed.

  Also in the present embodiment, an extended portion 20A that protrudes from the wire insertion port 7 and contacts the frame 4 of the container 5 is provided at the tip of the terminal plate 12 so that the frame 4 is grounded. Therefore, even if any unexpected situation occurs, the potential of the frame 4 can be maintained at the ground level.

  In the present embodiment, since the terminal plate 12 is lifted from the base portion 11 by a predetermined amount H, the terminal plate 12 can be prevented from interfering with the release lever 16. For this reason, as shown in FIG. 6, both sides of the terminal plate 12 can be widened (widened portion 12b) to increase the area of the terminal plate 12, and the tip of the external ground wire E can be made more stable. It becomes possible to fix to. Furthermore, by lifting the terminal board 12, a space in the distal direction of the screw 13 can be secured, and a longer screw 13 can be used accordingly.

  As mentioned above, although the connection apparatus of this invention was demonstrated taking the example to the said 1st, 2nd embodiment, this invention is not limited to these embodiment, In the range which does not deviate from a summary, other embodiment is various. Can be adopted. For example, in the above embodiment, the case where it is applied to an earth terminal for an outlet is illustrated, but the present invention is not limited to this, and can be similarly applied to an earth terminal of another electrical device such as a switch. The present invention is not limited to the earth terminal and can be applied to a connection device that connects ordinary electric wires.

It is a principal part perspective view of the outlet socket provided with the connection apparatus in 1st Embodiment of this invention. It is the disassembled perspective view which looked at the connection apparatus of the electrical outlet in 1st Embodiment of this invention, and its accommodating part from the (alpha) direction in FIG. It is the disassembled perspective view which looked at the principal part of the wiring apparatus in 1st Embodiment of this invention from (beta) direction in FIG. It is a perspective view which shows the assembly | attachment state of the principal part of the wiring apparatus in 1st Embodiment of this invention. It is an expanded sectional view of the principal part along the AA line in FIG. It is a disassembled perspective view which shows the principal part of the connection apparatus in 2nd Embodiment of this invention. It is an expanded sectional view of the principal part corresponding to the AA line in FIG.

Explanation of symbols

1 Outlet (electrical equipment)
2 Body
3 Cover (container)
3a General part of outer surface 4 Frame 5 Body 7 Wire insertion port 7a Outer open surface 10 Earth terminal (connection device)
11 Base part 12 Terminal board 13 Screw 20, 20A Extension part E External ground wire (electric wire)

Claims (3)

A container body having an electric wire insertion port for inserting an external electric wire to be connected to form an outer shell of an electric device, a base part that is housed in the container body and connects an internal electric wire, and provided in the base part A terminal plate that is provided at a position lower than the outer open surface of the wire insertion port and contacts the inserted external wire; and a screw that is screwed to the terminal plate to fix the external wire to the terminal plate. In a wiring device comprising:
A wire connection device, wherein the terminal plate is inclined with respect to a general portion of the outer surface of the container. A container body having an electric wire insertion port for inserting an external electric wire to be connected to form an outer shell of an electric device, a base part that is housed in the container body and connects an internal electric wire, and provided in the base part A terminal plate that is provided at a position lower than the outer open surface of the wire insertion port and contacts the inserted external wire; and a screw that is screwed to the terminal plate to fix the external wire to the terminal plate. In a wiring device comprising:
The connection device, wherein the terminal plate is formed by lifting from the base portion so as to be positioned in the vicinity of the outer open surface of the wire insertion opening.   The connection device according to claim 1 or 2, wherein an extending portion that protrudes from the wire insertion port and contacts the frame of the container is provided at a tip portion of the terminal plate.

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