JP4728076B2 - Circuit breaker - Google Patents

Description

  The present invention relates to a circuit breaker, and more particularly to a circuit breaker in which a load-side terminal is used as a quick connection terminal and the width of a breaker case is narrow and thin.

  The number of circuit breakers installed in distribution boards is increasing due to the increase in electrical equipment used in dwelling units. For this reason, circuit breakers are being reduced in size so that the circuit breaker installation space does not become large. For example, there is a circuit breaker formed with a half width of a conventional circuit breaker (see, for example, Patent Document 1). Such a circuit breaker employs a quick connection terminal in which the load side terminal is connected only by inserting an electric wire.

Japanese Patent Laid-Open No. 11-16479

In the circuit breaker assembled in the distribution board, the upper surface with the operation lever faces forward, making it difficult to see the load-side terminal on the front of the case, and the adjacent circuit breakers are in contact with each other Since it was installed, the load side terminals of adjacent circuit breakers were arranged close to each other. Therefore, the electric wire connected to the adjacent circuit breaker is in the way, and the connection work of the load side terminal is originally troublesome. In addition, in the case of the circuit breaker having a shape with a narrow width, since the electric wires connected to the adjacent circuit breakers are arranged nearby, it is difficult to connect the electric wires.
Therefore, as shown in the perspective view of the circuit breaker in FIG. 7, there is a device in which a wire guide 36 is provided below the wire insertion hole 35 of the load side terminal to facilitate the insertion of the wire. However, even if such a device is made, the wire insertion holes between adjacent circuit breakers are not separated from each other, so that the wire connection work has not been greatly improved.

  Therefore, in view of such a problem, the present invention provides a circuit breaker that is easy to connect an electric wire to a load side terminal even if the load side terminal of an adjacent circuit breaker approaches by forming a narrow and thin width. The purpose is to do.

In order to solve the above-mentioned problem, the invention according to claim 1 is a circuit breaker in which a power-side terminal is disposed on the back surface of the case, a load-side terminal is disposed on the front surface, and the load-side terminal is formed of a quick connection terminal. The wire insertion portion of the load side terminal is provided in an adapter separate from the case, and an accommodation recess for accommodating the adapter is provided on the front surface of the case, and the adapter can hold a pair of inserted wires, The electric wire is connected to the quick-connection terminal by accommodating the adapter holding the electric wire in the accommodating recess.
With this configuration, if the adapter holding the pair of electric wires is accommodated in the accommodating recess of the circuit breaker case, the connection of the load side terminal is made, so that the electric wires connected to the adjacent circuit breaker when connecting the electric wires Does not get in the way, and there is no hassle of directly inserting the wires into the circuit breaker case one by one. And since an adapter is a different body from a case, the holding operation of an electric wire can be performed in the space where it is easy to work.

The invention according to claim 2 is the invention according to claim 1, wherein the adapter has an upper member and a lower member and can be opened up and down with the electric wire insertion portion as a boundary, and the electric wire insertion portion in the opened state. After the electric wire is arranged, the electric wire is held by closing the upper member and the lower member.
With this configuration, the electric wire can be held with the adapter open, and the electric wire can be easily held.

According to a third aspect of the present invention, in the first aspect of the present invention, the adapter includes an adapter main body having an electric wire insertion portion and a holding member that presses the electric wire inserted through the electric wire insertion portion.
With this configuration, the adapter can easily accommodate the electric wires one by one.

  According to the present invention, when the adapter holding the pair of electric wires is accommodated in the accommodating recess of the circuit breaker case, the connection of the load side terminal is made. Therefore, when the electric wires are connected, the adapter is connected to the adjacent circuit breaker. In addition, there is no inconvenience that the electric wires get in the way, and there is no trouble of directly inserting the electric wires one by one into the circuit breaker case. And since an adapter is a different body from a case, the holding operation of an electric wire can be performed in the space where it is easy to work.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.
<First Embodiment>
1A and 1B are perspective views showing a first embodiment of a circuit breaker according to the present invention, in which FIG. 1A shows a state before connecting an electric wire, and FIG. 1B shows a state where an electric wire is connected. In the figure, 1 is a power supply side terminal, 2 is a load side terminal, 3 is an operation lever for opening and closing the electric circuit, 4 is a release button for releasing the lock of the electric wire connected to the load side terminal 2, Is provided on the rear surface of the circuit breaker case 5, the load side terminal 2 is provided on the front surface, and the operation lever 3 and the release button 4 are provided on the upper surface. In addition, 9 has shown the electric wire.

  The power supply side terminal 1 is a terminal connected to a single-phase three-wire electric circuit, arranged in a vertical direction, and formed by a plug-in type terminal. The load-side terminal 2 is configured by arranging an adapter 7 in a recess 6 formed in the upper part of the front surface of the case 5, and a quick connection terminal for connecting the electric wire 9 is disposed in the back of the recess 6. Yes. The recess 6 is an accommodation recess for accommodating the adapter 7, and by accommodating the adapter 7, the front surface of the case 5 becomes flat in the up and down direction.

The adapter 7 has a cubic shape, and is composed of an upper member 7a and a lower member 7b as shown in the enlarged view of FIG. 2, and is separated vertically with a pair of left and right electric wire insertion portions 11 provided at the center. It is formed as follows. And the electric wire insertion hole 11a is formed in parallel over the back surface of the adapter 7 following the electric wire insertion part 11, and this electric wire insertion hole 11a is also divided into 2 parts up and down.
Further, the upper member 7a and the lower member 7b are hinged at the rear, and the wire insertion portion 11 is configured to open as shown in FIG. 2, and the wire insertion portion 11 that is the end of the wire insertion hole 11a includes A tooth-shaped step portion 12 is provided around the wire to prevent it from coming off. The electric wire 9 with the coating stripped is inserted into the electric wire insertion hole 11a, and the pair of electric wires 9 and 9 are lined up and down and stored and held.

FIGS. 3A and 3B are cross-sectional explanatory views showing the configuration of the load-side terminal 2. FIG. 3A shows a state before the adapter is mounted, and FIG. Reference numeral 13 denotes a pressing spring formed by bending a plate spring, and reference numeral 14 denotes an engaging protrusion formed on the case 5 to engage with the adapter 7.
As shown in FIG. 3, the electric wire 9 connected to the load-side terminal 2 is held by the adapter 7, and then locked and connected to the pressing spring 13.

Specifically, the connection operation will be described. First, the covering of the electric wire 9 is peeled off over a predetermined length longer than the depth of the adapter 7, and the exposed internal conductor 9a is opened as shown in FIG. To be inserted. And a pair of electric wire 9 is hold | maintained by keeping the predetermined space | interval by closing the adapter 7. FIG.
Next, by aligning the adapter 7 with the recess 6 of the case 5, the internal conductor 9 a comes into contact with the pressing spring 13 disposed inside the case 5 as shown in FIG. Then, by pushing the adapter 7 into the case 5, the electric wire 9 is inserted against the elasticity of the pressing spring 13 as shown in FIG. 3B, and is electrically connected and fixed. At the same time, the adapter 7 is accommodated in the recess 6. At this time, the engagement protrusion 14 on the case side is engaged with the engagement recess 7c provided at the lower end of the adapter 7, and the adapter 7 is maintained in the inserted state. In this way, the electric wire 9 is connected to the load side terminal 2 constituted by the quick connection terminal.

  On the contrary, the operation for extracting the connected electric wire 9 will be described with reference to FIG. 4A and 4B are explanatory views of the operation of the release button 4. FIG. 4A is a longitudinal sectional view when the release button 4 is pressed, and FIG. 4B is a front view when the release button 4 is pressed. As shown in FIG. 4, first, the release button 4 is pushed in. By pushing the release button 4 in the direction of the arrow, the tip 4a of the release button 4 pushes down the pressing spring 13, the locking action by the elasticity of the pressing spring 13 is released, and the electric wire 9 can be extracted. Then, by further pushing the release button 4, the end 4 b of the release button 4 engages with the back of the adapter 7 and pushes the adapter 7 forward. Thus, the engagement between the adapter 7 and the case 5 is released, the adapter 7 moves forward, and the electric wire 9 can be pulled out by taking out the adapter 7 protruding forward.

In this way, if the adapter holding the pair of electric wires is accommodated in the accommodating recess of the circuit breaker case, the connection of the load side terminal is made, so that the electric wires connected to the adjacent circuit breaker when connecting the electric wires Does not get in the way, and there is no hassle of directly inserting the wires into the circuit breaker case one by one. And since an adapter is a different body from a case, the holding operation of an electric wire can be performed in the space where it is easy to work.
Moreover, the holding operation of the electric wire can be performed with the adapter opened, and the electric wire can be easily held.

Second Embodiment
FIG. 5 is a perspective view showing a second embodiment of the circuit breaker according to the present invention, in which 21 is a power supply side terminal, 22 is a load side terminal, 23 is an operation lever for opening and closing an electric circuit, and 24 is a load side. It is a release button for releasing the lock of the electric wire connected to the terminal 22, the power supply side terminal 21 is provided on the rear surface of the circuit breaker case 25, the load side terminal 22 is provided on the front surface, and the operation lever 23 and the release button 24 are provided on the upper surface. ing.

  The power supply side terminal 21 is a terminal connected to a single-phase three-wire electric circuit, arranged in the vertical direction, and formed by a plug-in type terminal. The load side terminal 22 is configured by arranging an adapter 27 in a recess 26 formed in the upper part of the front surface of the case 25, and a quick connection terminal for connecting the electric wire 9 is disposed in the back of the recess 26. Yes. The recessed portion 26 is a housing recessed portion for housing the adapter 27, and by housing the adapter 27, the front surface of the case 25 is in a flat state up and down.

  The adapter 27 has a cubic shape, and includes an adapter main body 27a having an electric wire insertion portion 31 and a lid-shaped holding member 27b provided on the upper portion of the adapter main body. The adapter main body 27a and the holding member 27b are butterflies at the rear. As shown in the perspective view of FIG. 6, the upper part of the adapter body 27a is configured to open and close. And the electric wire insertion part 31 of the adapter 27 has a through-hole over the back part of the adapter main body 27a, is formed so that the internal conductor 9a of the electric wire 9 may be inserted, and the holding member 27b is the electric wire 9 inserted into the electric wire insertion part 31. A locking projection 28 that presses and locks is formed on the bottom, and the inserted electric wire 9 is pressed and held by closing the upper portion of the adapter main body 27a and bringing the holding member 27b into close contact.

  The electric wire insertion / removal operation of the load side terminal 22 formed in this way is performed as follows. Insertion operation inserts the electric wire 9 which remove | eliminated the covering of the electric wire edge part by predetermined length into the electric wire insertion part 31 of the adapter 27 of the state which opened the holding member 27b first. When inserted, the holding member 27b is closed and the electric wire 9 is held. Then, by placing the adapter 27 in the concave portion 26 and inserting it into the concave portion 26, the electric wire 9 is locked and electrically connected to a pressing spring provided in the case 25 and is held. This pressing spring connecting operation is the same as the explanatory view shown in FIG.

  Conversely, the operation of extracting the connected electric wire 9 is the same as in the explanatory view shown in FIG. 4 described above. When the release button 24 is pressed, the locking by the pressing spring is released and the electric wire 9 can be extracted. . Then, when the release button 24 is further pushed in, the end of the release button 24 engages with the back portion of the adapter 27 to push the adapter 27 forward, and the engagement between the adapter 27 and the case 25 is released to move forward. . Thus, the electric wire 9 can be extracted by taking out the adapter 27 protruding forward.

In this way, if the adapter holding the pair of electric wires is accommodated in the accommodating recess of the circuit breaker case, the connection of the load side terminal is made, so that the electric wires connected to the adjacent circuit breaker when connecting the electric wires Does not get in the way, and there is no hassle of directly inserting the wires into the circuit breaker case one by one. And since an adapter is a different body from a case, the holding operation of an electric wire can be performed in the space where it is easy to work.
In addition, since the adapter can accommodate the electric wires one by one, the electric wire can be easily attached.

  In any of the above embodiments, the adapters 7 and 27 are configured to hold the internal conductor 9a of the electric wire 9, but may be configured to hold and hold the covering portion of the electric wire 9, at least the adapter. The part which protrudes in the back part of 7 and 27 should just be the internal conductor 9a.

It is a perspective view which shows 1st Embodiment of the circuit breaker which concerns on this invention, (a) is the state before an electric wire connection, (b) has shown the state which connected the electric wire. It is an enlarged view of the adapter of FIG. 1 in a state where the electric wire housing part is opened. It is explanatory drawing which shows a mode that an adapter is mounted | worn in a circuit breaker case, and an electric wire is connected, (a) is before mounting | wearing, (b) has shown after mounting | wearing. It is operation | movement explanatory drawing of the release button of FIG. 1, (a) is a longitudinal cross-sectional explanatory view of the load side terminal of the state which pressed the release button, (b) is the front of the load side terminal of the state which pressed the release button similarly. It is explanatory drawing. It is a perspective view which shows 2nd Embodiment of the circuit breaker based on this invention. It is an enlarged view of the adapter of FIG. It is explanatory drawing of the conventional circuit breaker.

Explanation of symbols

  1 .... Power supply side terminal 2 .... Load side terminal 4 .... Release button 5 .... Case 6. Recess (accommodation recess) 7. Adapter ... 7a ... Upper member 7b ... Lower member , 9 .. Electric wire, 11 .. Electric wire housing part, 13 .. Pressure spring, 21 .. Power supply side terminal, 22 .. Load side terminal, 24 .. Release button, 25 .. Case, 26. Recessed part), 27 .. Adapter, 27 a.. Adapter body, 27 b.

Claims (3)

In the circuit breaker in which the power supply side terminal is arranged on the back of the case, the load side terminal is arranged on the front, and the load side terminal is formed of a quick connection terminal.
The wire insertion portion of the quick connection terminal is provided in an adapter separate from the case, and an accommodation recess for accommodating the adapter is provided on the front surface of the case, and the adapter can hold a pair of inserted wires, A circuit breaker characterized in that an electric wire is connected to the quick-connection terminal by accommodating an adapter holding the electric wire in the accommodating recess. The adapter has an upper member and a lower member and can be opened up and down with the electric wire insertion portion as a boundary, and after disposing the electric wire in the electric wire insertion portion in the opened state, the upper member and the lower member are closed. The circuit breaker according to claim 1, wherein the electric wire is held. The circuit breaker according to claim 1, wherein the adapter includes an adapter main body having an electric wire insertion portion and a holding member for pressing the electric wire inserted into the electric wire insertion portion.

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