CN102651291A - Terminal device of circuit breaker - Google Patents

Abstract

The invention provides a terminal device of a circuit breaker. By using the terminal device, no change is applied on a present main body housing, terminal housing of accessories can be used smartly, and the wiring operationality can be improved. Main circuit terminals, each of which is constituted by a terminal plate, a terminal screw, and a gasket, are disposed respectively on terminal benches disposed on two ends of the main body housing. Terminal screws and gaskets are disposed on predetermined positions of terminal covers disposed on the above mentioned terminal benches. By wiring, when the terminal covers are disposed on the terminal benches, the terminals can be screwed tightly from outside to clamp wires between the terminal plates of the main circuit terminals and the gaskets fixedly. To be specific, the gaskets can be pressed between a pair of supporting foot sheets, which are disposed on a left side and a right side of upper walls of terminal covers for the temporary fixing, in advance. By wiring, when the terminal covers are disposed on the terminal benches of the main body housing, the terminal screws can be screwed into screw tool inserting holes in the upper walls, and the wires inserted into the terminal benches can be fixedly clamped between the terminal plates and the gaskets.

Description

Terminal Assembly for Circuit Breakers

technical field

The present invention relates to a terminal device of a circuit breaker aimed at a circuit protector (Circuit Protector) suitable for equipment protection of a low-voltage power distribution system.

Background technique

As the above-mentioned circuit protector, the contactor, the switching mechanism, and the overcurrent tripping device are mounted on the main body case, and the main circuit terminals on the power supply side and the load side are arranged on the terminal blocks of the main circuit formed at both ends of the main body case. (For example, refer to Patent Document 1), and an electronic board mounted on the main circuit as its accessory parts (parts), and a terminal cover for preventing electric shock (for example, refer to Patent Document 2) that covers the connection portion of the terminal is known .

Next, the structures of the terminal device and the terminal cover of the circuit protector (single pole) in the prior art are shown in Fig. 5 and Fig. 6 . In the above figure, reference numeral 1 is the main body case (molded resin molded product) of the circuit protector having a left and right bisected structure, reference numeral 1a is a terminal block of the main circuit formed at both ends of the main body case 1, and reference numeral 2 is a The main circuit terminal arranged on the terminal block 1a, reference numeral 3 is an opening and closing operation handle, and reference number 4 is a terminal cover (accessory part), and this terminal cover 4 is attached to the left and right partition walls 1b standing upright and formed on the terminal block 1a as described later. .

That is, the main circuit terminal 2 is to install the gasket 6 and the terminal screw 7 on the terminal plate 5 led out to the terminal block 1a, and connect it to the electric wire (not shown), and the terminal screw 7 is embedded (embedded) into the gasket 6, and screwed in advance. Closed on the terminal board 5. On the other hand, as shown in Fig. 6(a)-(c), the terminal cover 4 is an inverted U-shaped cover-shaped body (made of molded resin), and at its rear part, it protrudes downward from the side edge of the upper wall to form left and right sides. A pair of supporting leg piece 4a and engaging protrusion 4b. The hole 4c opened on the upper wall of the terminal cover 4 is a hole for electrometry (aperture diameter: 3.5 mm) for inserting an electrotest rod.

In addition, on the inner wall surface of the left and right partition wall 1b standing upright from the terminal block 1a of the main body case 1, facing the supporting leg piece 4a and the engaging protrusion 4b formed on the terminal cover 4, a longitudinal guide groove 1c and an engaging protrusion are formed. Groove 1d (refer to FIG. 5 ).

The above-mentioned circuit protector is installed in a panel such as a control panel in an installation posture such that the operating handle 3 faces forward.

In the above structure, in order to connect the wire (wire) to the main circuit terminal 2 of the circuit protector set in the panel, first, loosen the terminal screw 7, insert the wire between the terminal board 5 and the spacer 6, and then use Screwdriver (screwdriver) to tighten terminal screw 7. Next, in the state where the electric wires are connected, the terminal cover 4 of the accessory part is attached to the terminal block 1 a from the front to cover the main circuit terminal 2 and the connection portion of the electric wires. In addition, when connecting electric wires equipped with round crimping terminals, the terminal screws 7 and washers 6 are once removed from the terminal block 1a, the round crimping terminals are inserted into the terminal block 1a, and the terminal screws 7 are inserted into the terminal block 1a. The above-mentioned circular crimp terminals are fastened and wired to the terminal board 5 .

Patent Document 1: Japanese Patent Application Laid-Open No. 9-326228 (FIG. 1)

Patent Document 2: Japanese Patent Laid-Open No. 2009-266480

Contents of the invention

The problem to be solved by the invention

As described above, when the electric wire is connected to the main circuit terminal 2 of the circuit protector (refer to FIG. 5 ) of the conventional structure as described above, as the work flow, it is temporarily unscrewed and screwed and held on the terminal board 5 . The terminal screw 7 is used, and then the wire inserted into the terminal block 1a is fastened with the terminal screw 7, and the terminal cover 4 is installed on the terminal block 1a thereafter. Therefore, in the case of a control panel equipped with a plurality of circuit protectors, This wiring work requires much labor and time.

In addition, when wiring the round crimp terminals of electric wires, it is necessary to temporarily remove the terminal screws, but as described above, the installation posture of the circuit protector installed in the panel is such that the operating handle 3 is installed facing forward. Therefore, when using a screwdriver to remove the terminal screw 7, it is easy to make an operation error, resulting in the problem that the gasket 6 and the terminal screw 7 fall off from the terminal block 1a and fall into the disk, and are lost.

In addition, in order to reduce the number of man-hours for wiring work, a structure in which an openable terminal cover is integrally provided on the main body case of the circuit protector is also known. However, in order to adopt this method, it is necessary to change the shape of the main body case. The mold cannot be simply applied to the circuit protector products that are currently circulating in the market.

The present invention is proposed in view of the above-mentioned problems in the prior art, and its purpose is to provide an improved terminal device of a circuit breaker, which is aimed at the above-mentioned circuit protector without changing the existing main body case. Wiring workability is improved by cleverly utilizing the terminal cover attached to the terminal block of the main body case.

Technical means used to solve problems

In order to achieve the above object, according to the present invention, in the terminal device of the circuit breaker, the main circuit terminals on the power supply side and the load side, including terminal boards, terminal screws, and washers, are arranged on the main circuit terminals formed at both ends of the main body casing. On the terminal block of the circuit, as an accessory part, a terminal cover mounted on the terminal block to cover the main circuit terminals is provided;

In the above-mentioned terminal cover, the washer of the main circuit terminal and the terminal screw are combined in advance, and temporarily held at a predetermined position. When wiring, in the state where the terminal cover is attached to the terminal block, the terminal cover is attached to the terminal cover from the outside of the terminal cover. The terminal screw is tightened to clamp and fasten the wire between the terminal plate and the spacer of the main circuit terminal (technical solution 1), specifically, temporarily hold the terminal of the main circuit terminal with respect to the terminal cover as follows Screws, washers.

That is, the terminal cover is an inverted U-shaped cover-shaped body, and a pair of left and right supporting legs and engaging protrusions protrude from the rear side edge of its upper wall, and a screw fastening is formed in an opening on the upper wall. In the insertion hole of the screwdriver, in the state where the terminal screw is inserted into the washer, the washer is pressed between the above-mentioned support leg pieces to hold it temporarily (claim 2).

Effect of the present invention.

According to the terminal device configured as described above, the following effects can be achieved. That is, when the circuit breaker is set in the panel, when connecting the electric wires to its main circuit terminals, the user installs the terminal cover temporarily holding the terminal screws and washers on the terminal block of the main body case in advance. Next, insert the screwdriver into the hole pierced on the upper wall of the terminal cover, and tighten the terminal screw. Through such a simple operation, the wires inserted into the terminal block can be screwed and connected. This saves the work of loosening and removing the terminal screws from the terminal board at the time of wiring as in conventional products, and can reduce the number of man-hours for wiring. The problem of falling off and losing terminal screws and gaskets caused by this problem can efficiently carry out wiring work in a short time.

Furthermore, the structure of the main body case of the circuit breaker does not need to be changed, and only a slight change in the terminal cover of the accessory part is required.

Description of drawings

1 is a configuration diagram of an embodiment of the present invention for a circuit protector, wherein (a) is a side view showing an assembled state before one terminal cover is attached, and (b) is a plan view of (a).

Fig. 2 is an end view of Fig. 1, wherein (a) is an end view viewed from the left side, and (b) is an end view viewed from the right side.

Fig. 3 shows the state in which terminal screws and washers are temporarily held in the terminal cover of Fig. 1, wherein (a) is a side view, (b) is an end view viewed from the rear side, (c) is a bottom view, ( d) is a perspective view seen from the bottom side.

Fig. 4 is an appearance perspective view of the embodiment corresponding to Fig. 1, wherein (a) and (b) are views viewed from different directions.

5 is an external perspective view showing the configuration of a terminal device employed in a conventional circuit protector.

Fig. 6 is a structural view of the terminal cover of Fig. 5, wherein (a) is a plan view, (b) is a side view, and (c) is a front view.

The symbols are explained as follows:

1-main body housing, 1a-terminal block, 1b-partition wall, 1c-guide groove, 1d-engagement groove

2- Main circuit terminal

3-Operating handle

4-terminal cover, 4a-supporting foot piece, 4b-engagement protrusion, 4d-screw insert hole

5-terminal board

6-gasket

7-terminal screw

Detailed ways

Next, an embodiment of the present invention targeting the above-mentioned circuit protector will be described based on the embodiments shown in FIGS. 1 to 4 . Components corresponding to those in FIG. 5 and FIG. 6 in the embodiment diagrams are denoted by the same symbols, and explanations thereof are omitted.

The structure of the circuit protector of the illustrated embodiment is basically the same as that of the prior art example shown in FIGS. 7. Gasket 6, as described below, the gasket 6 and the terminal screw 7 are temporarily held in the state of the terminal cover 4 as an accessory part of the circuit protector, and are bundled with the product and delivered to the user.

That is, at the rear part of the upper wall of the terminal cover 4 installed in the terminal block 1a of the main body housing 1, a pair of left and right supporting leg pieces 4a and engaging protrusions 4b identical to the conventional product of FIG. 6 are formed. The side edge protrudes downward. Therefore, in the illustrated embodiment, as shown in FIG. 3 , in the state where the terminal screw 7 is inserted into the washer 6 , the washer 6 is pressed into between the supporting leg pieces 4 a to temporarily hold the terminal cover 4 . Inside the upper wall.

For this reason, the inner dimension (Internal Dim) L between the left and right pair of supporting foot pieces 4a is preset to be consistent with the width dimension d of gasket 6. The temporary holding position of the spacer 6 in the front-rear direction is preset as follows: insert the support leg piece 4a into the guide groove 1c (see FIG. In the state of being attached to the terminal block 1a of the main body case 1, the axial tip of the terminal screw 7 temporarily held by the terminal cover 4 faces the screw hole of the terminal plate 5 (see FIG. 2 ).

In addition, in order to insert the screwdriver into the terminal cover 4 from the outside to perform the operation of screwing the terminal screw 7, on the upper wall of the terminal cover 4, as shown in Figure 1 (b) and Figure 4, the temporary connection between the screwdriver insertion hole 4d and the terminal screw 7 Keep piercing consistent in position. The hole diameter of the screwdriver insertion hole 4d is about 6 mm.

In the above structure, when wiring the circuit protector installed in the panel, the terminal cover 4, which temporarily holds the washer 6 and the accessory part of the terminal screw 7, is removed from the main body case 1 in advance as the work flow. The front part is fitted into the partition wall 1b of the terminal block 1a (see Fig. 2(a), (b)). Insert the tip of the electric wire (wire rod or crimp terminal) that will be wired later into the terminal block 1a through the terminal cover 4. In this state, insert the screwdriver into the screwdriver insertion hole 4d of the terminal cover 4, and press in the terminal screw. 7 while being screwed into the screw hole of the terminal board 5 for fastening operation. As a result, the electric wires are clamped and fastened between the terminal board 5 and the spacer 6 .

As can be seen from this work flow, in the wiring work of connecting the electric wires to the main circuit terminals, it is not necessary to perform the work of loosening and removing the terminal screws 7 as in the prior art, and the number of wiring man-hours can be reduced. In addition, During the screw operation, there is no fear that the terminal screw 7 and the spacer 6 will come off from the terminal block 1a, and the wiring work can be efficiently performed in a short time.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above-described embodiments. Various changes can be made within the scope of the technical thought of the present invention, and they all belong to the protection scope of the present invention.

Claims (2)

1. the arrangements of terminal of a circuit-breaker; The main circuit terminal arrangement of mains side, load-side that will comprise terminal board, terminal screw, pad is at the terminal board of the main circuit that is formed at the body shell two ends; Be provided with the terminal cover that is installed in said terminal board, covering main circuit terminal as appurtenances, the arrangements of terminal of this circuit-breaker is characterised in that:

At said terminal cover; In advance the pad of main circuit terminal and terminal screw combination are remained on assigned position temporarily; During distribution; The terminal cover being installed under the state of terminal board, from the outside of this terminal cover terminal screw is tightened operation, the electric wire clamping is fastened between the terminal board and pad of main circuit terminal.

2. the arrangements of terminal of circuit-breaker according to claim 1 is characterized in that:

The terminal cover is the lid bodies that is reverse U shape; The tab-like one-tenth of rear portion lateral margin of wall has the support foot sheet and the engaging protrusion of pair of right and left above that; And; Be formed with the fastening patchhole that revolves tool of screw at upper wall, terminal screw inlayed under the state that inserts pad, pad is pressed between the said support foot sheet and interim the maintenance.

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