JP2022103709A - Embedded wiring equipment - Google Patents

Abstract

To provide embedded wiring equipment 1 that can be mounted on a mounting frame having various configurations and can open and close a terminal cover 20 without interfering with the mounting frame.SOLUTION: A terminal cover 20 includes a pair of protrusions 21 that form a rotating shaft, and an elastic flexure portion 23 that elastically bends and relatively moves the pair of protrusions 21. An outer case 10 includes a bearing recess 15 that rotatably supports the pair of protrusions 21, a pair of sliding grooves 16 that slide and guide the pair of protrusions 21 along a virtual plane facing the side surface of the outer case 10. Then, the pair of protrusions 21 each come out of the pair of bearing recesses 15 and move to the pair of sliding grooves 16 by elastically bending the elastic flexing portion 23.SELECTED DRAWING: Figure 3

Description

The present invention relates to embedded wiring equipment such as outlets and switches installed on a wall in a room.

This type of embedded wiring fixture is mounted on a metal or resin mounting frame and installed on the wall of the room. In the state of being installed on the wall part, only the surface part is exposed from the wall surface of the room, and the other parts are embedded in the internal space of the wall part, so that it is called an embedded wiring device.

The embedded wiring fixture is provided with a plurality of terminal portions to which electric wires for constructing indoor wiring are connected. In recent years, these terminal portions are generally configured to be provided inside a case called a screwless terminal in order to prevent a short circuit between electric wires due to adhesion of dust or the like.

However, screwless terminals are not suitable for connecting electric wires that carry large currents, and even today, embedded wiring equipment for large current applications uses terminal parts that are configured to fasten electric wires to the terminal parts with terminal screws. ing. Since the terminal portion having such a configuration is provided so as to be exposed on the outer surface of the case, it is preferable to prevent the adhesion of dust, and for that purpose, an embedded wiring device having a configuration including a terminal cover has been proposed.

Patent Document 1 discloses an embedded wiring device with a terminal cover previously proposed by the applicant.
The embedded wiring device disclosed in Document 1 is provided with a terminal portion provided with a terminal screw (4) on the side surface of the case (1), and a terminal cover (22) surrounds the terminal screw (4). It is configured to cover. The terminal cover (22) has a shaft (25) rotatably fitted in a bottomed groove (12) that functions as a bearing, and rotates about the shaft (25). Then, the terminal cover (22) is opened to expose the terminal screw (4), and the electric wire is fastened. After the electric wire is connected, the terminal cover (22) is rotated and closed to close the terminal screw. The periphery of (4) is covered with the terminal cover (22), and it becomes possible to prevent dust from adhering to the electric wire and the terminal screw (4).

The embedded wiring device of Patent Document 1 described above is, for example, a terminal cover (22) on the premise of a flat plate-shaped mounting frame (100) manufactured by punching a metal plate as shown in FIG. 2 of Patent Document 2. ) Was composed. That is, with this kind of flat plate-shaped mounting frame, the terminal cover (22) can be rotated without interfering with the mounting frame.

However, in recent years, mounting frames having various configurations have been developed. For example, as shown in FIG. 1 of Patent Document 3, the first holding wall (11a) and the first back wall (21a) are wiring fixtures (21a). The metal mounting frame (50) having a structure facing the side surface of the 30) and the accommodation guide frame (21) facing the side surface of the wiring device (B) as shown in FIG. 1 of Patent Document 4. A resin mounting frame (A) having a structure in which the wiring is arranged is also used. In the mounting frame (50) of Patent Document 3, the terminal cover (22) cannot be rotated because the first holding wall (11a) and the first back wall (21a) interfere with each other. Further, in the mounting frame (A) of Patent Document 4, the terminal cover (22) cannot be rotated because the accommodation guide frame (21) interferes with the mounting frame (A). Therefore, there arises a problem that the work of fastening the electric wire to the terminal screw (4) is hindered.

Jikkensho 59-17588 Gazette Japanese Unexamined Patent Publication No. 2010-102940 Japanese Unexamined Patent Publication No. 2011-188692 Japanese Unexamined Patent Publication No. 2002-44824

The present invention has been made in view of the above circumstances, and is an embedded wiring device that can be mounted on a mounting frame having various configurations and can open and close the terminal cover without interfering with the mounting frame. The purpose is to provide.

In order to achieve the above object, the present invention has a terminal portion provided on the side surface of an external case in an embedded wiring device having an external case and installed on a wall portion with the external case mounted on a mounting frame. And a terminal screw for fastening the electric wire to the terminal part, and an insulating terminal cover for covering the terminal part and the periphery of the terminal screw.
The terminal cover is incorporated in an external case and has a configuration that rotates between a rotation closing position that covers the terminal portion and the periphery of the terminal screw and a rotation opening position that exposes the terminal portion and the terminal screw, and also has a terminal. A configuration in which the sliding closed position that covers the periphery of the portion and the terminal screw and the sliding opening position that exposes the terminal portion and the terminal screw are linearly moved along a virtual plane facing the side surface of the outer case. It is characterized by having done it.

With this configuration, if the mounting frame to which the embedded wiring device according to the present invention is mounted does not have a component portion that projects to a position facing the side surface of the outer case of the embedded wiring device, it can be easily rotated. The terminal cover can be opened and closed. On the other hand, when the mounting frame has a component that projects to a position facing the side surface of the outer case of the embedded wiring device, the terminal cover can be moved by a linear movement operation without interfering with the projecting component. It can be opened and closed.

Here, the terminal cover has a pair of protrusions constituting the rotation shaft and an elastic bending portion that elastically bends to relatively move the pair of protrusions.
The outer case has a bearing recess that rotatably supports the pair of protrusions, and a pair of sliding grooves that slide and guide the pair of protrusions along a virtual plane facing the side surface of the outer case.
By elastically bending the elastic bending portion, the pair of protrusions can each come out of the pair of bearing recesses and move to the pair of sliding grooves.

Further, a tool hooking portion is formed on the back surface of the terminal cover, and the tool is hooked on the tool hooking portion to pull the terminal cover in the extending direction of the sliding groove, whereby the elastic flexing portion elastically bends. , The pair of protrusions may each come out of the pair of bearing recesses and move to the pair of sliding grooves.

As described above, according to the present invention, the terminal cover can be mounted on a mounting frame having various configurations, and the terminal cover can be opened and closed without interfering with the mounting frame.

It is a figure which shows the appearance of the embedded wiring apparatus which concerns on embodiment of this invention, (a) is a front view, (b) is a left side view, (c) is a bottom view. It is a figure which shows the terminal cover incorporated in the embedded wiring apparatus which concerns on embodiment of this invention, (a) is a front view, (b) is a right side view, (c) is a bottom view, (d) is a rear view. Is. (A) and (b) are enlarged front views showing a part cut out in order to explain a characteristic portion of the embedded wiring device according to the embodiment of the present invention. It is a front view for demonstrating the characteristic part of the embedded wiring apparatus which concerns on embodiment of this invention following FIG. Following FIG. 3, it is a figure for demonstrating the characteristic part of the embedded wiring apparatus which concerns on embodiment of this invention, (a) is a front view, (b) is a left side view. It is a figure exemplifying three kinds of mounting frames which can mount the embedded wiring apparatus which concerns on embodiment of this invention, (a) (d) (g) are plan views, (b) (e) (h) are front views. , (C) (f) (i) are left side views. 6 is a left side view showing a state in which the embedded wiring device according to the embodiment of the present invention is mounted on the mounting frame shown in FIGS. 6A, 6B and 6C. FIG. 6 is a front view showing a state in which the embedded wiring device according to the embodiment of the present invention is mounted on the mounting frame shown in FIGS. 6 (d), 6 (e) and 6 (f).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present embodiment, a configuration example in which the present invention is applied to the embedded wiring device 1 having a function as a switch is shown. However, the embedded wiring appliance 1 of the present invention is not limited to a switch, and can be widely applied to various embedded wiring appliances 1 (for example, outlets) installed by using a mounting frame on a wall in a room. Of course.

FIG. 1 is a diagram showing the appearance of the embedded wiring device according to the present embodiment. The embedded wiring device 1 shown in the figure has various parts for forming a switch built in the outer case 10 composed of the lid 12 of the case body 11, and the boss surface provided on the lid 12. The swing-type operator 31 is exposed on (the upper surface of the figure). The operation button 32 is fitted into the operator 31 as shown by a virtual line in FIG. 1 (b).
The case body 11 and the lid 12 are fastened and integrated by the mounting bracket 33. The mounting bracket 33 is formed with mounting claws 33a, mounting holes 33b, and the like for mounting on the mounting frame.
As the basic structure of the embedded wiring device 1, a conventionally known structure can be appropriately adopted.

The embedded wiring device 1 includes a terminal portion 13 exposed on the side surface of the outer case 10. In the embedded wiring device 1 shown in FIG. 1, two terminal portions 13 are provided on each of the two side surfaces, and each terminal portion 13 is electrically connected to a switch circuit (not shown) constructed in the outer case 10. Is conducting. The switch circuit is provided with a plurality of contacts, and the plurality of contacts are electrically connected or disconnected as the operator 31 swings.
An electric wire is inserted from the insertion hole 34 with the terminal screw 14 loosened, and the electric wire is fastened to each terminal portion 13 by screwing the terminal screw 14.

A terminal cover 20 is incorporated in the side surface of the outer case 10 provided with the terminal portion 13.
The embedded wiring device 1 according to the present embodiment shown in FIG. 1 has a configuration in which one terminal cover 20 covers the periphery of two terminal portions 13 provided on one side surface of the outer case 10. Therefore, the terminal cover 20 is incorporated in each of the two side surfaces of the outer case 10.

FIG. 2 is a diagram showing the configuration of the terminal cover.
The terminal cover 20 is made of resin and is formed on a flat plate having a substantially square shape. A pair of protrusions 21 are formed by projecting from both corners of one side 20a in a direction extending the side. These pair of protrusions 21 form a rotation shaft of the terminal cover 20.

Further, the terminal cover 20 is formed with a notch groove 22 by cutting vertically from substantially the center of the one side 20a to the inside. By forming this notch groove 22, when torque is applied to each protrusion 21 in the direction indicated by the arrow A in FIG. 2A, both side portions of the notch groove 22 elastically bend in the direction of the notch groove 22. nothing. That is, both side portions of these notch grooves 22 form elastic flexure portions 23. Then, the elastic bending portion 23 elastically bends in the direction of the notch groove 22, so that the pair of protrusions 21 move relative to each other in the direction of shortening the distance from each other.

In this embodiment, as shown in FIG. 2A, an auxiliary notch groove 24 is formed in the intermediate portion between each protrusion 21 and the notch groove 22 by vertically cutting inward from the one side 20a. There is. By forming the auxiliary notch groove 24, the elastic bending portion 23 becomes easy to bend.

A tool hooking portion 25 is formed on the back surface of the terminal cover 20. Further, in the vicinity of the pair of protrusions 21 constituting the rotation shaft, a stopper 26 formed of a convex portion is formed on each side adjacent to the one side 20a. Further, locking claws 27 are formed at both corners of the side facing the one side 20a. The tool hooking portion 25, the stopper 26, and the locking claw 27 will be further described later.

FIG. 3 is an enlarged front view showing a part cut out in order to explain a characteristic portion of the embedded wiring device.
As shown in FIG. 3A, bearing recesses 15 are provided at both corners on the side surface of the lid 12 constituting the outer case 10. By fitting the protrusions 21 into the bearing recesses 15, the terminal cover 20 is incorporated into the outer case 10 in a state where the protrusions 21 are rotatably supported.

The terminal cover 20 is rotatable about each protrusion 21 supported by the bearing recess 15 as a rotation axis as shown by an arrow B in FIG. 3A. Then, the rotation position facing the side surface of the outer case 10 is set as the rotation closing position, and the rotation can be rotated by approximately 90 ° from the rotation closing position toward the front of the paper surface in FIG. 3 (a). The position rotated by approximately 90 ° from the rotationally closed position is defined as the rotationally open position. FIG. 4 is a side view of the state in which the terminal cover 20 is rotated to the rotational opening position.

In the rotationally closed position, the terminal cover 20 is arranged so as to face the side surface of the outer case 10 and covers the periphery of the terminal portion 13 and the terminal screw 14 provided on the side surface of the outer case 10. As a result, it is possible to suppress the adhesion of dust to the terminal portion 13 and the terminal screw 14.

When the terminal cover 20 is rotated to the rotationally closed position, the locking claw 27 formed on the terminal cover 20 engages with the locking convex portion 19 provided at the bottom of the outer case 10 (FIG. 1 (FIG. 1). c) See). As a result, the terminal cover 20 is fixed and free rotation is restricted. The engaged state of the locking claw 27 with the locking convex portion 19 can be easily released by a manual operation by an operator. That is, simply by pulling the terminal cover 20, the locking claw 27 elastically bends and the engaged state with the locking convex portion 19 is released, so that the locking claw 27 can be rotated to the rotational opening position.

On the other hand, by rotating the terminal cover 20 to the rotational opening position, the terminal portion 13 and the terminal screw 14 provided on the side surface of the outer case 10 are exposed. As a result, the terminal screw 14 can be easily operated, the electric wire is inserted from the insertion hole 34 with the terminal screw 14 loosened, and the electric wire is fastened to each terminal portion 13 by the screwing operation of the terminal screw 14.

Although not clearly shown in the figure when the terminal cover 20 is rotated to the rotational opening position, the stopper 26 formed on the terminal cover 20 is a wall provided around the bearing recess 15 in the outer case 10. Engage in. As a result, the terminal cover 20 is fixed and free rotation is restricted. The engagement state of the stopper 26 with the surrounding wall can also be easily released by a manual operation by an operator. That is, the stopper 26 can be slid and separated from the surrounding wall simply by applying a force to the terminal cover 20.

Further, the case body 11 is formed with a sliding groove 16 extending linearly from the vicinity of each bearing recess 15 toward the bottom.
Each end of each of these sliding grooves 16 is provided at a position adjacent to the bearing recess 15 with the boundary wall 17 interposed therebetween. Then, as shown by an arrow C in FIG. 3B, when the terminal cover 20 is pulled in the same direction as the sliding groove 16 extends, each protrusion 21 presses the inner wall of the bearing recess 15, and the reaction thereof is shown in the figure. The torque in the direction indicated by the arrow A in 2 (a) acts on each protrusion 21. As a result, the elastic bending portion 23 of the terminal cover 20 elastically bends, each protrusion 21 comes out of the bearing recess 15, and further gets over the boundary wall 17 and enters the sliding groove 16.
As a result, as shown in FIG. 5A, a state in which each protrusion 21 can slide in the sliding groove 16 is formed. When each protrusion 21 is guided by the sliding groove 16 and slides, the terminal cover 20 moves linearly along a virtual plane facing the side surface of the outer case 10.

In order to apply the load in the direction indicated by the arrow C in FIG. 3B to the terminal cover 20, the tip of a tool such as a flat-blade screwdriver is inserted into the tool hook portion 25 formed on the back surface of the terminal cover 20, and the external case is used. The tool may be pressed by the principle of leverage with the support convex portion 18 provided on the bottom of the 10 as a fulcrum. The tool hooking portion 25 is formed at or near a position facing the support convex portion 18 when the terminal cover 20 is arranged at the rotationally closed position.

On the other hand, each protrusion 21 that has moved to the sliding groove 16 presses the terminal cover 20 in the direction opposite to the arrow C in FIG. 3B, so that each protrusion 21 is in turn at the end of the sliding groove 16. It hits the wall. The contact pressure at this time elastically bends the elastic bending portion 23 of the terminal cover 20, and the protrusion 21 comes out of the sliding groove 16. In the present embodiment, an inclined surface 21a is formed at the tip of each protrusion 21, and the inclined surface 21a abuts on the open end edge of the sliding groove 16 so that the protrusion 21 comes out of the sliding groove 16. It's easy. The protrusion 21 that has come out of the sliding groove 16 gets over the boundary wall 17 and enters the bearing recess 15. As a result, the terminal cover 20 is arranged at the rotationally closed position.

This rotation closing position also serves as a sliding closing position when the terminal cover 20 linearly moves along a virtual plane facing the side surface of the outer case 10. When the terminal cover 20 is arranged in the sliding closed position, the terminal cover 20 is arranged so as to face the side surface of the outer case 10, and is around the terminal portion 13 and the terminal screw 14 provided on the side surface of the outer case 10. Is covering.

Further, when each terminal is guided by the sliding groove 16 and slides to the sliding end near the bottom of the outer case 10, the terminal cover 20 is arranged at the sliding opening position. When the terminal cover 20 is in the sliding opening position, the terminal portion 13 and the terminal screw 14 are exposed. FIG. 5 shows a state in which the terminal cover 20 is in the sliding opening position.

In this way, by moving the terminal cover 20 linearly along the virtual plane facing the side surface of the outer case 10 between the sliding open position and the sliding closed position, the terminal cover 20 faces the side surface of the outer case 10. The terminal cover 20 can be opened and closed without interfering with the mounting frame even if a part of the mounting frame is overhanging to the area where the mounting frame is to be used. Therefore, it can be mounted on a mounting frame having various configurations.

FIG. 6 is a diagram illustrating three types of mounting frames having different configurations.
The mounting frame 40 shown in FIGS. 6A, 6B and 6C is a flat plate-shaped mounting frame manufactured by punching a metal plate, and corresponds to the mounting frame disclosed in Patent Document 2. When the embedded wiring device 1 according to the present embodiment is mounted on the flat plate-shaped mounting frame 40 of this type, as shown in FIG. 7, the terminal cover 20 is rotated without interfering with the mounting frame 40. Can be opened and closed with.

The mounting frame 50 shown in FIGS. 6 (d), 6 (e) and 6 (f) is a resin mounting frame, and the accommodation guide frame 51 overhangs (corresponding to the mounting frame of Patent Document 4), as shown in FIG. In addition, by moving the terminal cover 20 linearly along a virtual plane facing the side surface of the outer case 10, the terminal cover 20 can be opened and closed without interfering with the accommodation guide 51.

The mounting frame 60 shown in FIGS. 6 (g), 6 (h), and 6 (i) also has a holding wall 61 overhanging (corresponding to the mounting frame of Patent Document 3), but the terminal cover 20 faces the side surface of the outer case 10. By moving linearly along the virtual plane, the terminal cover 20 can be opened and closed without interfering with the holding wall 61.

The present invention is not limited to the above-described embodiment, and various modifications and applications can be implemented as needed.
Further, although the embedded wiring device of the present invention is suitable for connecting an electric wire through which a large current flows, the application is not limited to that, and various configurations in which a terminal portion is provided on the outside of the outer case are provided. Of course, it can be applied to embedded wiring equipment.

1: Embedded wiring equipment,
10: External case, 11: Case body, 12: Cover body, 13: Terminal part, 14: Terminal screw, 15: Bearing recess, 16: Sliding groove, 17: Boundary wall, 18: Support convex part, 19: Engagement Stop convex part,
20: Terminal cover, 20a: One side, 21: Protrusion, 21a: Inclined surface, 22: Notch groove, 23: Elastic flexure part, 24: Auxiliary notch groove, 25: Tool hook part, 26: Stopper, 27: Locking claw,
31: Operator, 32: Operation button, 33: Mounting bracket, 33a: Mounting claw, 33b: Mounting hole, 34: Insertion hole 40, 50, 60: Mounting frame, 51: Accommodation guide frame, 61: Holding wall

Claims (3)

In an embedded wiring fixture that has an external case and is installed on the wall with the external case mounted on the mounting frame.
The terminal portion provided on the side surface of the outer case and
A terminal screw for fastening an electric wire to the terminal portion,
It is provided with an insulating terminal cover for covering the terminal portion and the circumference of the terminal screw.
The terminal cover is incorporated in the outer case and is configured to rotate between a rotation closing position that covers the terminal portion and the periphery of the terminal screw and a rotation opening position that exposes the terminal portion and the terminal screw. In addition, between the sliding closed position that covers the terminal portion and the periphery of the terminal screw and the sliding opening position that exposes the terminal portion and the terminal screw, along a virtual plane facing the side surface of the outer case. An embedded wiring device characterized by being configured to move linearly. The terminal cover has a pair of protrusions constituting a rotation shaft and an elastic bending portion that elastically bends to move the pair of protrusions relatively.
The outer case has a bearing recess that rotatably supports the pair of protrusions, and a pair of sliding grooves that slide and guide the pair of protrusions along a virtual plane facing the side surface of the outer case. death,
The first aspect of the present invention is characterized in that, by elastically bending the elastic bending portion, the pair of protrusions each come out of the pair of bearing recesses and move to the pair of sliding grooves. Embedded wiring equipment. A tool hooking portion is formed on the back surface of the terminal cover, and a tool is hooked on the tool hooking portion to pull the terminal cover in the direction in which the sliding groove extends, whereby the elastic flexible portion is elastically flexed. The embedded wiring device according to claim 2, wherein the pair of protrusions each come out of the pair of bearing recesses and move to the pair of sliding grooves.

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