JP2015207365A - Terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal device which reduces the number of components and is capable of suppressing generation of heat in the case where a current flows.SOLUTION: A terminal seat 4 is integrally provided in a rectangular box-shaped terminal metal fitting 2. Therefore, the terminal device is conventionally formed from three components of a rectangular box-shaped terminal metal fitting, a terminal screw and a terminal seat but the terminal device can be formed from two components of the rectangular box-shaped terminal metal fitting 2 and a terminal screw 3. Therefore, the reduction in the number of components can be attained and installation into a circuit breaker is facilitated. Further, since any contact point is not present between the rectangular box-shaped terminal metal fitting 2 and the terminal seat 4, the generation of heat in the case where a current flows can be suppressed.

Description

  The present invention relates to a terminal device used for, for example, a circuit breaker or a switch.

  Conventionally, for example, a terminal device for connecting an electric wire or the like is installed at a power supply side terminal or a load side terminal of a circuit breaker (for example, Patent Document 1). The conventional terminal device will be described with reference to FIG. 5. The terminal device 21 is formed by bending a metal plate into a cross-sectionally-shaped opening that opens on both the front and rear sides, and has an insertion space S into which an electric wire or the like can be inserted. A rectangular box-shaped terminal fitting 22, a terminal screw 23 that can be screwed into the insertion space S from the top surface of the rectangular box-shaped terminal fitting 22, and a belt-like shape that can be inserted into the insertion space S from one opening of the rectangular box-shaped terminal fitting 22. Terminal seat 24. The fitting portion 22 a of the square box terminal fitting 22 is located on the lower surface of the square box terminal fitting 22.

  The terminal device 21 is in such a posture that the other opening of the rectangular box-shaped terminal fitting 22 faces the outside of the circuit breaker with one end of the terminal seat 24 inserted into the insertion space S of the rectangular box-shaped terminal fitting 22. It is installed in the case body of the circuit breaker. Then, the electric wire inserted into the insertion space S from the other opening of the rectangular box-shaped terminal fitting 22 is screwed into the insertion space S and pressed against the lower surface of the rectangular box-shaped terminal fitting 22 together with the terminal seat 24, thereby An electric circuit in the circuit breaker connected to the other end of the terminal seat 24 can be electrically connected.

JP 2001-155572 A

  However, since the conventional terminal device is composed of the three members of the rectangular box-shaped terminal fitting 22, the terminal screw 23, and the terminal seat 24 as described above, the number of parts is large and the installation work on the circuit breaker or the like is troublesome. There's a problem. Further, since the two members of the rectangular box-shaped terminal fitting 22 and the terminal seat 24 are in contact with each other, heat is generated at the contact point between the rectangular box-shaped terminal fitting 22 and the terminal seat 24 when a current flows. There is also a problem that it is easy to do.

  Further, since the fitting portion 22a is located on the lower surface of the square box-shaped terminal fitting 22, when the terminal screw 23 is screwed and the electric wire and the terminal seat 24 are pressed against the lower surface of the square box-shaped terminal fitting 22, the fitting portion 22a. A load is applied in the direction in which the fitting is opened. Therefore, there is also a problem that the fitting portion 22a is easy to open.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal device that has a small number of parts and can suppress heat generation when a current flows.

In order to achieve the above object, the invention described in claim 1 of the present invention is formed by bending a metal plate so as to surround the upper surface, both side surfaces, and the lower surface, and has a space opening in the front-rear direction at the center. A rectangular box-shaped terminal fitting in which an electric wire can be inserted into the space through the opening, the lower surface extends in the front-rear direction, and the lower surface is a terminal seat that can be connected to an electric circuit in the device. And a terminal screw that can be screwed into the space from the upper surface of the rectangular box-shaped terminal fitting and electrically connects the electric wire inserted into the space and the terminal seat portion. And
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the fitting portion of the metal plate in the rectangular box-shaped terminal fitting is located on either the left or right side surface.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the electric wire jumps out of the space into the opening on the side where the terminal seat portion is formed in the square box terminal fitting. The blocking wall for blocking is formed by being bent so as to close the opening.

According to the present invention, the metal plate is bent so as to surround the upper surface, both side surfaces, and the lower surface, and has a space that opens in the front-rear direction at the center, and an electric wire can be inserted into the space through the opening. In addition, a rectangular box-shaped terminal fitting having a lower surface extending in the front-rear direction and having the lower surface as a terminal seat that can be connected to an electric circuit in the device is provided. That is, since the terminal seat portion is integrally formed with the square box-shaped terminal fitting, it has conventionally been composed of three members: a square box-shaped terminal fitting, a terminal screw, and a terminal seat. And it can comprise from two members of a terminal screw. Therefore, the number of parts can be reduced, and the installation work to the circuit breaker is simplified. Furthermore, since there is no contact point between the rectangular box-shaped terminal fitting and the terminal seat, heat generation when a current is passed can be suppressed.
Further, according to the invention described in claim 2, since the fitting portion is located on either the left or right side, when the terminal screw is screwed and the electric wire is electrically connected to the terminal seat portion, the load is fitted. Does not apply directly to the mating section. Therefore, it can be set as the terminal device with which a fitting part cannot open easily.
Furthermore, according to the invention described in claim 3, the wire retaining wall for preventing the electric wire from jumping out of the space is opened in the opening on the side where the terminal seat portion is formed in the rectangular box-shaped terminal fitting. It is formed by bending so as to close the wall. That is, the wire-holding wall is also formed integrally with the square box-shaped terminal fitting. Therefore, compared with the conventional terminal device in which the wire retaining wall is attached as a separate member, the number of parts can be further reduced, and the installation work to the circuit breaker or the like becomes very simple.

It is explanatory drawing which showed the upper case and lower case of the circuit breaker. It is perspective explanatory drawing which showed the terminal device in a decomposition | disassembly state. It is perspective explanatory drawing which showed the terminal device in a decomposition | disassembly state. It is perspective explanatory drawing which showed the example of a change of a terminal device. It is perspective explanatory drawing which showed the decomposition | disassembly state of the conventional terminal device.

  Hereinafter, a circuit breaker including a terminal device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view showing an upper case 16 and a lower case 17 of a circuit breaker. 2 and 3 are perspective explanatory views showing the terminal device 1 in an exploded state, in which FIG. 2 is shown from the terminal seat portion 4 side, and FIG. 3 is shown from the opposite side of FIG.
The circuit breaker has a main body case in which an upper case 16 and a lower case 17 made of synthetic resin are assembled, and terminal installation portions 18 and 18 constituting power supply side terminals on the front portion of the lower case 17 are rear portions. Are provided with terminal installation portions 19 and 19 constituting load side terminals, respectively. Further, an electric circuit (not shown) for electrically connecting the terminal device 1 installed in the terminal installation unit 18 and the terminal device 1 installed in the terminal installation unit 19 can be disposed in the main body case. It has become. Reference numeral 20 denotes an operation window for exposing an operation lever (not shown) for turning on / off the electric circuit.

Here, the terminal apparatus 1 installed in the terminal installation parts 18 and 19 used as the principal part of this invention is demonstrated.
The terminal device 1 includes a rectangular box-shaped terminal fitting 2 into which an electric wire or the like can be inserted, and a terminal screw 3 that can be screwed into the rectangular box-shaped terminal fitting 2. The rectangular box-shaped terminal fitting 2 has a cross section that surrounds the upper surface, the left and right side surfaces, and the lower surface in the order of the upper lower surface, one side surface, the upper surface, the other side surface, the lower lower surface, and the one side surface. It is formed by bending in a square shape and fitting on one side. Therefore, the fitting portion 2 a is located on one side surface of the square box-shaped terminal fitting 2. Moreover, the space opened in the front and back both sides formed in the center of the square box-shaped terminal metal fitting 2 functions as an insertion space S into which an electric wire or the like can be inserted. Furthermore, the lower surface (particularly the upper lower surface) of the rectangular box-shaped terminal fitting 2 is extended so as to protrude outward in the front-rear direction from the insertion space S, and the lower surface is connected to the electric circuit in the circuit breaker. It functions as the terminal seat part 4 to be performed. In addition, a screw hole 5 for screwing a terminal screw 3 is provided on the upper surface of the square box-shaped terminal fitting 2. Reference numeral 6 denotes a round hole provided at the tip of the terminal seat portion 4.

  The terminal device 1 stores the rectangular box-shaped terminal fitting 2 in the terminal installation portions 18 and 19 with the terminal seat 4 facing toward the inside of the main body case, and the upper case 16 and the lower case 17 are assembled. Installed in the body case. And the terminal device 1 installed in this way inserts the electric wire into the insertion space S of the square box-shaped terminal fitting 2 from the outside of the main body case, and then screwes the terminal screw 3 into the insertion space S from above. By pressing the electric wire against the terminal seat portion 4 of the box-shaped terminal fitting 2, the electric wire and the electric circuit in the circuit breaker connected to the tip of the terminal seat portion 4 can be electrically connected.

According to the terminal device 1 having the above configuration, since the terminal seat portion 4 is integrally provided on the square box-shaped terminal fitting 2, conventionally, the square box-shaped terminal fitting, the terminal screw, and the terminal seat 3 are provided. When it consists of one member, it can comprise from two members, the square box-shaped terminal metal fitting 2 and the terminal screw 3. FIG. Therefore, the number of parts can be reduced, and the installation work to the circuit breaker is simplified. Moreover, since there is no contact point between the square box-shaped terminal fitting 2 and the terminal seat portion 4, it is possible to suppress heat generation when a current is passed.
Furthermore, since the fitting part 2a is located on the side surface, when the terminal screw 3 is screwed and the electric wire is pressed against the terminal seat part 4, the load is not directly applied to the fitting part 2a. Therefore, it can be set as the terminal device 1 with which the fitting part 2a is hard to open.

  In addition, the terminal device according to the present invention is not limited to the aspect of the above-described embodiment, and the configuration of the rectangular box-shaped terminal fittings and the like is appropriately determined as necessary without departing from the spirit of the present invention. Can be changed.

  For example, instead of the terminal device 1 of the above embodiment, a terminal device 11 as shown in FIG. 4 is also conceivable. Similar to the terminal device 1, the terminal device 11 is provided with a terminal seat portion 14 integrally provided on the square box-shaped terminal fitting 12. However, the square box-shaped terminal fitting 12 is also integrally provided with a wire retaining wall 13 that is bent so as to close the opening on the terminal seat 14 side. The wire retaining wall 13 is for preventing the electric wire from jumping over the insertion space S toward the terminal seat portion 14 when the electric wire is inserted into the insertion space S from the other opening. By providing the wire retaining wall 13 in an integrated manner, the number of parts can be further reduced as compared with the conventional terminal device in which the wire retaining wall is attached as a separate member. There is an effect that the installation work is very simple. In FIG. 4, reference numeral 12 a denotes a fitting portion for forming the rectangular box-shaped terminal fitting 12, and 15 denotes a screw hole for screwing the terminal screw 3.

Moreover, in the said embodiment, although the upper lower surface of the square box-shaped terminal metal fitting 2 is extended and the terminal seat part 4 is formed, the lower lower surface of the square box-shaped terminal metal fitting 2 is extended and a terminal is formed. The seat 4 may be formed. Furthermore, there is no problem even if the rectangular box terminal fitting 2 is bent differently so that the lower surface of the square box terminal fitting 2 is not double but single. Furthermore, the fitting portion 2a of the rectangular box-shaped terminal fitting 2 may be positioned on the lower surface as in the prior art.
In addition, although the terminal device installed in the circuit breaker has been described in the above embodiment, the terminal device according to the present invention can also be suitably used as a terminal of other electrical equipment such as a switch. .

  1, 11, ... Terminal device, 2, 12, ... Square box terminal fittings, 2a, 12a, ... Fitting part, 3 ... Terminal screw, 4, 14 ... Terminal seat part, 13 ... Wire retaining wall, S .. Insertion space.

Claims (3)

The metal plate is bent so as to surround the upper surface, both side surfaces, and the lower surface, and has a space opening in the front-rear direction at the center, and an electric wire can be inserted into the space through the opening, and the lower surface Is a rectangular box-shaped terminal fitting that extends in the front-rear direction and has the lower surface as a terminal seat that can be connected to an electric circuit in the device,
It is possible to screw into the space from the upper surface of the rectangular box-shaped terminal fitting, and it is provided with a terminal screw for electrically connecting the electric wire inserted into the space and the terminal seat portion. Terminal device.   2. The terminal device according to claim 1, wherein a fitting portion of the metal plate in the rectangular box-shaped terminal metal fitting is located on either the left or right side surface.   A wire retaining wall for preventing the electric wire from jumping out of the space is bent and formed so as to close the opening in the opening on the side where the terminal seat portion is formed in the square box terminal fitting. The terminal device according to claim 1, wherein the terminal device is provided.

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