JP6015920B2 - 2-pole switch - Google Patents

Description

The present invention relates to a two-pole switch having a function of turning on / off (connecting or interrupting) a wiring (circuit) on a power supply side and a wiring (circuit) on a load side.
Here, the “pole” refers to the number of circuits that can be controlled simultaneously by the switch, and thus the two-pole switch refers to a switch that can control two circuits.

  As a conventional two-pole switch of this type, a configuration as disclosed in Patent Document 1 is known. The two-pole switch of the same document 1 has two fixed terminals and two connection terminals incorporated in the body. For example, two wires on the power supply side are connected to each fixed terminal. At the same time, two wires on the load side are connected to each connection terminal. A fixed contact is electrically connected to each fixed terminal, and each of the two movable contacts incorporated in the body is provided with a movable contact, and each fixed contact and the movable contact are arranged to face each other. ing. The movable contact is configured to swing by the operation of the operation element so that each movable contact is brought into contact with or separated from (ie, on / off from) each fixed contact.

In such a conventional two-pole switch, all of the current from the power source flows to each fixed terminal, fixed contact, connection terminal, and movable contact, as in the circuit shown in FIG. Since a general AC power source for home use has a relatively small rated power of about 100 V and 15 A, the above-described switch configuration has no problem.
However, for example, when a power source having a large rated power such as 300 V and 30 A is connected to a load and it is desired to turn on and off between them, the current flowing between the contacts is too large for the conventional two-pole switch.

JP 2001-291454 A

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a two-pole switch excellent in durability that can be turned on and off between a power source and a load having a large rated power.

In order to achieve the above object, the present invention is a two-pole switch comprising an operating body that performs an on / off operation, a fixed terminal portion to which wiring of each pole is connected, and a movable terminal portion,
The fixed side terminal portion includes a first A terminal portion and a first B terminal portion,
The movable terminal portion includes a second A terminal portion and a second B terminal portion,
The first A terminal portion is branched and electrically connected to the two first A fixed contacts,
The first B terminal portion is branched and electrically connected to the two first B fixed contacts,
The second A terminal portion is branched and electrically connected to the two second A opening / closing mechanism portions,
The second B terminal portion is branched and electrically connected to the two second B opening / closing mechanism portions,
Each 2A opening and closing mechanism part and each 2B opening and closing mechanism part each include a movable contact that is swingable, and a movable contact provided on the movable contact,
One of the first A fixed contacts and one of the movable contacts included in the second A opening / closing mechanism are disposed to face each other so as to be freely contacted and separated.
The other one of the first A fixed contacts and the other one of the movable contacts included in the second A opening and closing mechanism are disposed to face each other in a freely detachable manner
One of the first B fixed contacts and one of the movable contacts included in the second B opening / closing mechanism are arranged to be opposed to each other so as to be freely separated from each other.
The other of the 1B fixed contacts and the other of the movable contacts included in the 2B opening / closing mechanism are disposed so as to be able to come into contact with each other.
The operating body is characterized in that the four movable contacts are collectively swung.

  According to the present invention having the above-described configuration, the power supply side wiring is connected to one of the fixed side terminal portion and the movable side terminal portion, the load side wiring is connected to the other, and the space between them is accompanied by the operation of the operating body. Can be turned on and off. And since the branch circuit is configured between the fixed side terminal part and the movable side terminal part, and the current flowing through each fixed contact and the movable contact is distributed, each fixed contact As a result, an on / off operation can be performed without hindrance and high durability can be ensured.

Furthermore, the present invention can also be configured as follows.
That is, each component is built into the container,
The first A terminal portion includes a fixed-side external terminal exposed on one side of the container body, and a fixed-side connection conductor that is electrically connected to the fixed-side external terminal inside the container body and has two fixed-side branch portions. Including a 1A fixed contact at each fixed-side branch,
The first B terminal portion is also a fixed-side external terminal exposed on one side of the container body, a fixed-side connection conductor that is electrically connected to the fixed-side external terminal inside the container body and has fixed-side branch portions at two locations; Including a 1B fixed contact at each fixed-side branch,
The second A terminal portion includes a movable external terminal exposed on the other side of the container, a movable connection conductor electrically connected to the movable external terminal inside the container, and having movable movable branch portions at two locations. 2A opening and closing mechanism part is electrically connected to each fixed side branch part,
The second B terminal also has a movable external terminal exposed on the other side of the container, and a movable connection conductor electrically connected to the movable external terminal inside the container and having a movable branch at two locations. And the second B opening / closing mechanism may be electrically connected to each fixed-side branch.

  Furthermore, the container shall be configured to have a size and shape to be mounted on the wiring device mounting frame defined in Japanese Industrial Standard JIS-C-8304, and shall be provided with a fixing bracket for fixing to the wiring device mounting frame. Is preferred. By comprising in this way, it becomes possible to establish a facility similarly to the conventional two-pole switch by using the standardized wiring device mounting frame, and it is easy to perform the facility work and improve workability. .

Furthermore, the operating body has a configuration in which an operating portion for performing an on / off operation is arranged so as to protrude from the surface of the body and is swingably incorporated in the body.
The movable contacts are arranged in a line inside the vessel body, and a swing fulcrum is provided at the bottom of the vessel body, and the operating body engages with the swing edge opposite to the swing fulcrum, A configuration may be adopted in which each movable contact swings in the same direction as the operating body swings.
And the terminal cover which coat | covers a fixed side external terminal and a movable side external terminal can also be provided in both sides | surfaces of a container so that opening and closing is possible.

  As described above, according to the present invention, a branch circuit is formed between the fixed terminal portion and the movable terminal portion, and the current flowing through each fixed contact and movable contact is distributed, resulting in a large rated power. Even if the power source is connected, the current flowing between each fixed contact and the movable contact becomes small. As a result, it is possible to perform the on / off operation without any trouble and to ensure high durability.

1 is an external perspective view of a two-pole switch according to an embodiment of the present invention. It is an external appearance perspective view which shows the state which opened the terminal cover of the two-pole switch which concerns on embodiment of this invention. It is a top view which expands and shows the internal structure of the two-pole switch which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the internal structure of the two-pole switch which concerns on embodiment of this invention. It is a top view which expands and shows the component of the two-pole switch which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which expand | deploys and shows the component of the two-pole switch which concerns on embodiment of this invention. It is a figure which shows the electrical circuit structure of the two-pole switch which concerns on embodiment of this invention. It is a figure which shows a fixed side connection conductor, (a) is a top view, (b) is a front view, (c) is a left view, (d) is a rear view. It is a figure which shows a movable side connection conductor, (a) is a top view, (b) is a front view, (c) is a right view, (d) is a rear view. It is a figure which shows a movable contact and its support spring, (a) is a top view of a movable contact, (b) is also a front view, (c) is also a right view, (d) is a top view of a support spring, (E) is also a front view, and (f) is a right side view. It is a figure which shows an operation body, (a) is a top view, (b) is a right view, (c) is a rear view, (d) is a front view, (e) is a longitudinal cross-sectional view. It is a top view which shows the state which mounted | wore the wiring fixture mounting frame with the two-pole switch which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The two-pole switch according to the embodiment of the present invention has an appearance as shown in FIGS. As will be described later, terminal covers 50 are provided on both side surfaces of the container 1 so as to be freely opened and closed. FIG. 1 shows a state in which the terminal cover 50 is closed, and FIG. 2 shows a state in which the terminal cover 50 is opened. ing.
Each component constituting the two-pole switch is incorporated in the container 1 as shown in FIGS.

5 and 6 are exploded views showing components of the two-pole switch according to this embodiment. Here, FIG. 5 is a diagram in which each component is extracted from the plan view shown in FIG. 3 and developed, and FIG. 6 is a diagram in which each component is extracted from the longitudinal sectional view shown in FIG.
As shown in these drawings, the two-pole switch according to the present embodiment includes a container body 1, four external terminals 11 and 21 exposed from both side surfaces of the container body 1, and each built in the container body 1. Four connection conductors 12 and 22, a movable contact 24, a support spring 26 and a pressing coil spring 27, an operating body 30, an intermediate pedestal 40, two terminal covers 50, and two fixing brackets 60 are provided.

  The container 1 is composed of a resin-molded case 2 and a cover 3, and after the components are assembled into the interior from the surface opening of the case 2, the cover 3 is attached to the surface opening. . An opening 3 a is formed at the center of the cover 3, and the operation part 31 of the operation body 30 protrudes from the opening 3 a to the outside.

The external terminals 11 and 21 are divided into two fixed-side external terminals 11 and two movable-side external terminals 21, and the fixed-side external terminal 11 is one side surface of the container body 1 (the left side in FIGS. 3 and 5). It is incorporated in the container 1 so as to be exposed from the surface. Moreover, the movable-side external terminal 21 is incorporated in the container body 1 so as to be exposed from the other side surface of the container body 1 (the right side surface in FIGS. 3 and 5). In this embodiment, each external terminal is constituted by a terminal screw 14, a spring washer 15 and a washer 16 having the same size and shape.
In addition, the bipolar terminal according to the present embodiment assumes a use in which a power source having a large rated power such as 300 V and 30 A is connected to a load and turned on and off between them, and the wiring connected to the power source is generally a stranded wire. In view of the above, a structure using a terminal screw 14 to which a stranded wire can be connected is used. However, a known screwless terminal structure (for example, see Patent Document 1) may be employed depending on the application. When the screwless terminal structure is adopted, the terminal cover 50 can be omitted.

Next, the connection conductors 12 and 22 are divided into two fixed side connection conductors 12 and two movable side connection conductors 22, and the fixed side connection conductor 12 is one side region (FIG. 3). , The movable side connection conductor 22 is incorporated in the other side region (the right region in FIGS. 3 and 5) of the vessel body 1.
As shown in FIG. 8, the fixed-side connection conductor 12 is manufactured by bending a metal plate, and is a female screw that screws the terminal screw 14 of the fixed-side external terminal 11 into the central portion of the flat body portion 12a. A portion 12b is formed, and a fixed-side branch portion 12c is formed by extending in a U shape from two locations on both sides of the upper end of the body portion 12a. Of the two fixed-side connection conductors 12, each fixed-side branch portion 12c in one fixed-side connection conductor 12 is provided with a first A fixed contact 13a, and each fixed-side branch portion in the other fixed-side connection conductor 12 is provided. The 1B fixed contact 13b is provided in 12c.

  Further, as shown in FIG. 9, the movable side connection conductor 22 is formed by bending a metal plate, and the terminal screw 14 of the movable side external terminal 21 is screwed into the central portion of the plate-shaped body portion 22a. An internal thread portion 22b is formed. Further, both side portions of the body portion 22a are bent in an L shape, and the lower edges of the bent portions are bent inward to form movable side branch portions 22c at the two locations. Support springs 26 are connected by rivets to the movable side branch portions 22 c formed at two locations on each of the two movable side connection conductors 22.

As shown in FIGS. 10A to 10C, the movable contactor 24 is manufactured by cutting out a metal plate, and the lower end edge 24a forms a swing fulcrum. A movable contact 25 is provided at the center of the movable contact 24. Note that an operating body 30 to be described later engages with an upper end edge 24b positioned above the movable contact 25.
Also, as shown in FIGS. 10D to 10F, the support spring 26 is formed by bending a metal plate, and the base 26a is movable side branching portion 22c of the movable side connecting conductor 22 as described above. Connected to. Further, the intermediate curved portion that is concave downward forms a support portion 26b of the movable contact 24, and the lower end edge 24a (swinging fulcrum) of the movable contact 24 is disposed on the support portion 26b. And this support part 26b is urged | biased upward by the press coil spring 27 incorporated in the bottom part of the container 1, and this urging | biasing force makes the movable contact 24 either on-off with a predetermined rocking angle as a boundary. Forcibly swings in the direction. That is, a toggle mechanism is configured (see FIG. 4).

  Here, as shown in FIG. 3, the movable contact 24, the support spring 26, the pressing coil spring 27, and the movable contact that are electrically connected to the two movable side branch portions 22 c of the one movable side connection conductor 22. 25 constitutes a second A opening / closing mechanism 23a. Similarly, the movable contact 24, the support spring 26, the pressing coil spring 27, and the movable contact 25 electrically connected to the two movable side branch portions 22c of the other movable side connection conductor 22 are the second B opening / closing mechanism. Part 23b is configured.

The two first A fixed contacts 13a provided on one fixed-side connection conductor 12 and the two movable contacts 25 included in the second A opening / closing mechanism 23a are opposed to each other in the container 1 so as to be able to come into contact with each other. Is done. Similarly, the two 1B fixed contacts 13b provided on the other fixed-side connection conductor 12 and the two movable contacts 25 included in the secondB opening / closing mechanism portion 23b are opposed to each other in the body 1 so as to be freely separated from each other. Be placed.
At this time, the four movable contacts 24 are arranged in a line inside the container 1.

In such a configuration, as shown in FIG. 7, the fixed-side connection conductor 12 provided with the first A fixed contact 13a and the one fixed-side external terminal 11 electrically connected thereto are connected to the first A terminal portion 10a. Configure. Similarly, the fixed-side connection conductor 12 provided with the first B fixed contact 13b and the other fixed-side external terminal 11 electrically connected thereto constitute the first B terminal portion 10b.
The first A terminal portion 10a and the first B terminal portion 10b constitute the fixed terminal portion 10 to which one pole (power supply side wiring in FIG. 7) is connected.

Further, the second A opening / closing mechanism portion 23a, and one second connection conductor portion and the movable-side external terminal 21 that are electrically connected thereto constitute the second A terminal portion 20a. Similarly, the second B opening / closing mechanism portion 23b, the other second connection conductor portion electrically connected to the second B opening / closing mechanism portion 23b, and the movable side external terminal 21 constitute a second B terminal portion 20b.
And these 2A terminal part 20a and 2B terminal part 20b comprise the movable side terminal part 20 to which the other pole (load side wiring in FIG. 7) is connected.

Between the first A terminal portion 10a provided on the fixed side terminal portion 10 and the second A terminal portion 20a provided on the movable side terminal portion 20, the fixed side connection conductor 12, the second A opening / closing mechanism portion 23a, and the movable side are provided. Since it is branched into two by the connecting conductor 22, the current value flowing through each of the fixed contacts 13 a and 13 b and each movable contact 25 is approximately half the value of the current flowing through the fixed-side external terminal 11. Similarly, between the 1B terminal part 10b provided in the fixed terminal part 10 and the 2B terminal part 20b provided in the movable terminal part 20, the fixed connection conductor 12 and the second B opening / closing mechanism part 23b are also provided. Since the branching is performed by the movable connection conductor 22, the current value flowing through the fixed contacts 13 a and 13 b and the movable contact 25 is approximately half the value of the current flowing through the fixed external terminal 11.
In this way, a branch circuit is formed between the fixed terminal portion 10 and the movable terminal portion 20, and the current flowing through the fixed contacts 13a and 13b and the movable contact 25 is distributed. Even if they are connected, the current flowing between the fixed contacts 13a, 13b and the movable contact 25 is reduced. As a result, on / off operation can be performed without any trouble, and high durability can be ensured. .

As shown in FIG. 11, the operating body 30 includes an operating portion 31 protruding from the surface of the base portion 30a, and engaging portions 32 formed in a line on the back surface of the base portion 30a, and further, both end surfaces of the base portion 30a. Is formed with a swing fulcrum 33. The operating body 30 arranges the swing support point 33 on the swing support part (not shown) of the container 1 and also arranges the operation part 31 so as to protrude from the opening 3a of the cover 3 described above, Further, each engaging portion 32 is incorporated in the container 1 in a state where the engaging portions 32 are engaged with the upper end edges 24b of the four movable contacts 24 (see FIG. 4).
The four movable contacts 24 swing together to open and close between the contacts as the operating body 30 swings.

The middle pedestal 40 is incorporated in the surface opening of the case 2 and has a function of supporting each internal component.
The terminal cover 50 is attached to both side surfaces of the container body 1 so as to be freely opened and closed, and covers the fixed-side external terminal 11 and the movable-side external terminal 21 in the closed state shown in FIG. Prevent dust adhesion.

  As shown in FIG. 12, the two-pole switch of the present embodiment is configured to have a size and shape for mounting the container 1 on the wiring device mounting frame 100 defined in Japanese Industrial Standard JIS-C-8304. Further, on both sides of the surface (boss surface) of the container body 1, fixing brackets 60 for fixing the container body 1 to the wiring device mounting frame 100 are provided. With this configuration, it is possible to establish a facility in the same manner as a conventional two-pole switch by using the standardized wiring fixture mounting frame 100, and it is easy to perform facility work and improve workability.

  In addition, this invention is not limited to embodiment mentioned above, Of course, a various deformation | transformation or application is possible.

1: body, 2: case, 3: cover,
10: Fixed side terminal portion, 10a: 1A terminal portion, 10b: 1B terminal portion, 11: Fixed side external terminal, 12: Fixed side connection conductor, 12c: Fixed side branch portion, 13a: 1A fixed contact, 13b : 1B fixed contact, 14: terminal screw, 15: spring washer, 16: washer,
20: Movable side terminal, 20a: 2A terminal, 20b: 2B terminal, 21: Movable external terminal, 22: Movable connecting conductor, 22c: Movable branch, 23a: 2A opening / closing mechanism 23b: 2B opening / closing mechanism, 24: movable contact, 25: movable contact, 26: support spring, 27: pressing coil spring,
30: Operation body, 31: Operation part, 32: Engagement part, 33: Swing fulcrum 40: Middle pedestal 50: Terminal cover 60: Fixing metal fitting 100: Wiring fixture mounting frame

Claims (5)

A two-pole switch comprising an operating body that performs an on / off operation, a fixed side terminal portion to which wiring of each pole is connected, and a movable side terminal portion,
The fixed terminal portion includes a first A terminal portion and a first B terminal portion,
The movable terminal portion includes a second A terminal portion and a second B terminal portion,
The first A terminal portion is branched and electrically connected to two first A fixed contacts,
The first B terminal portion is branched and electrically connected to two first B fixed contacts,
The second A terminal portion is branched and electrically connected to two second A opening / closing mechanism portions,
The second B terminal portion is branched and electrically connected to two second B opening / closing mechanism portions,
Each of the second A opening / closing mechanism portions and each of the second B opening / closing mechanism portions includes a movable contact that is swingable, and a movable contact provided on the movable contact,
One of the first A fixed contacts and one of the movable contacts included in the second A opening / closing mechanism portion are arranged so as to be able to come into contact with each other.
The other of the first A fixed contacts and the other of the movable contacts included in the second A opening and closing mechanism portion are arranged to face each other in a freely detachable manner.
One of the first B fixed contacts and one of the movable contacts included in the second B opening and closing mechanism portion are disposed so as to be able to come into contact with each other.
The other of the first B fixed contact and the other of the movable contact included in the second B opening and closing mechanism portion are arranged to face each other so as to be contactable and separable.
The operating body is configured to swing the four movable contacts together.
A two-pole switch characterized by that. Each of the above components is incorporated in the container,
The first A terminal portion is a fixed-side external terminal exposed on one side surface of the vessel body, and a fixed side that is electrically connected to the fixed-side external terminal inside the vessel body and has fixed-side branch portions at two locations. Each of the fixed-side branch portions is provided with the first A fixed contact,
The first B terminal portion also has a fixed-side external terminal exposed on one side of the vessel body, and a fixed side that is electrically connected to the fixed-side external terminal inside the vessel body and has fixed-side branch portions at two locations. Each of the fixed-side branch portions is provided with the 1B fixed contact,
The second A terminal part is a movable side external terminal exposed on the other side surface of the container body, and a movable side electrically connected to the movable side external terminal inside the container body and having movable side branch parts at two locations. And the second A opening and closing mechanism part is electrically connected to each of the fixed-side branch parts.
The second B terminal portion is also a movable side external terminal exposed on the other side surface of the vessel body, and a movable side electrically connected to the movable side external terminal inside the vessel body and having movable side branch portions at two locations. Including a connecting conductor, and the second B opening and closing mechanism is electrically connected to each of the fixed-side branch portions,
The two-pole switch according to claim 1.   The container body is configured to have a size and shape to be mounted on a wiring device mounting frame defined in Japanese Industrial Standard JIS-C-8304, and includes a fixing bracket for fixing to the wiring device mounting frame. The two-pole switch according to claim 2. The operating body is disposed so as to protrude on the surface of the container body and swingably incorporated in the container body, and performs an on / off operation.
The movable contacts are arranged in a line inside the container body, a swing fulcrum is provided at the bottom of the container body, and the operating body is provided at the swing end edge opposite to the swing fulcrum. Are engaged, and each movable contact is swung in the same direction as the operating body swings.
The two-pole switch according to claim 3.   The two-pole switch according to claim 4, wherein a terminal cover that covers the fixed-side external terminal and the movable-side external terminal is provided on both side surfaces of the container body so as to be openable and closable.

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