JP3494352B2 - Terminal device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device, for example, a circuit breaker, to which an external conductor is connected.

[0002]

2. Description of the Related Art FIG.
It is a perspective view of the conventional terminal device for circuit breakers shown by the publication. FIG. 5 is an exploded perspective view of essential parts of the terminal device shown in FIG. FIG. 6 is a sectional view showing a state in which an external conductor is connected to the terminal device shown in FIG. FIG. 7 is a cross-sectional view showing a state where the terminal plate of the terminal device shown in FIG. 6 is floated. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.

4 to 8, reference numeral 1 is a base of a terminal device formed of an insulating material such as synthetic resin, and 1a is a base partition wall for insulating each phase or the outside.
Reference numeral 1b is a recess provided between the base partition walls 1a, 1c is a screw relief hole provided at the center of the recess 1b, 1d is a seat provided around the recess 1b, and 1e is an outside of the seat 1d. The groove 1f provided is a through hole. A square nut 2 is positioned and stored in the recess 1b. Reference numeral 3 denotes a terminal plate having a base end portion 3a located inside the circuit breaker, a tip end portion 3b press-fitted into the groove 1e, and an intermediate portion 3c located on the receiving seat 1d. It is made of a good conductor such as copper alloy. Further, the terminal plate 3 has a contact point 3 at the base end 3a.
d is fixed, and a through hole 3e is provided in the intermediate portion 3c.

Reference numeral 4 denotes a terminal screw penetrating the through hole 3e and screwed to the square nut 2. The tip portion 4a of the terminal screw 4 is located inside the screw escape hole 1c. Reference numerals 5 and 6 respectively denote a spring washer and a pressing plate through which the terminal screw 4 penetrates. Reference numeral 7 is a cover for covering the base 1, in which a circuit breaker opening / closing mechanism and the like (not shown) are housed.
It is made of an insulating material such as synthetic resin. Reference numeral 7a is a cover partition wall for insulating each phase and the outside, 7b is a seat, and 7c is a through hole. 8 is a holding plate 6 and a terminal plate 3
It is an outer conductor that is sandwiched between and and electrically connected to the terminal board 3. Reference numeral 9 is a mounting screw for fixing the circuit breaker to a base (not shown), which is a seat 7b of the cover 7 and a through hole 7
It is fixed to the base via c and 1f.

In the conventional terminal device as described above,
The outer conductor 8 is electrically connected to the terminal plate 3 by inserting the tip of the outer conductor 8 between the terminal plate 3 and the pressing plate 6 and tightening the terminal screw 4 to the square nut 2. Further, by pressing the tip portion 3a of the terminal plate 3 into the groove 1e, the terminal plate 3 is fixed to the seat 1d so that the terminal plate 3 does not move even if the outer conductor 8 moves.

[0006]

In the conventional terminal device constructed as described above, since the terminal plate 3 is made of a material having a not so strong mechanical strength, as shown by an arrow in FIG. When the outer conductor 8 is lifted with a little large force, the tip portion 3b of the terminal plate 3 is deformed, the terminal screw 4 is tilted, and the intermediate portion 3c of the terminal plate 3 is lifted from the seat 1d. When 8 is moved up and down, there is a problem that the base end 3a of the terminal board 3 is displaced. Further, in the above example, the contact point 3d is provided on the base end portion 3a of the terminal plate 3, but usually, the base end portion 3a of the terminal plate 3 is often attached with a component to be fixed, and therefore the contact point 3d is not provided. If the base end portion 3a is displaced as described above, there is a problem that the performance of the circuit breaker becomes abnormal.

Further, as shown in FIG. 8, when a copper wire outer conductor 8 is connected between the terminal plate 3 and the pressing plate 6, the head of the terminal screw 4 is displaced by the outer diameter of the outer conductor 8. The space insulation distance between the respective phases is the distance L1 between the terminal screws 4 of the respective phases which are linearly connected through a slight gap between the base 1 and the mating surface 17 of the cover 7. Further, since the mounting screws 9 for fixing the circuit breaker to the base are mounted on the partition walls 1a and 7a which insulate the phases from each other, between the mounting screw 9 serving as the ground portion and the terminal screw 4 serving as the charging portion. Insulation distance is space insulation distance L
There is a problem in that it is about half of that of the first embodiment and the insulation distance between the terminal screws 4 of each phase is also reduced.

Further, as shown in FIG. 9, when a plate-shaped outer conductor 8 such as a steel plate is connected between the terminal plate 3 and the holding plate 6 and the terminal screw 4 is tightened, the outer conductor 8 and the holding plate 6 are pressed. The plate 6 rotates in the direction of the arrow and is pressed against the base partition wall 1a that insulates each phase of the base 1 or the outside,
There was a problem that the base partition wall 1a was destroyed.

The present invention has been made in order to solve the above-mentioned problems, and does not increase the manufacturing cost.
It is possible to prevent the terminal board from rising and
An object of the present invention is to obtain a terminal device capable of strengthening the insulation between the ground, the charging part and each phase and further improving the strength of the base partition wall of the terminal part.

[0010]

A terminal device according to the present invention is provided with a seat on a base made of an insulating material.
Position the middle part of the terminal board on the
Connect the outer conductor to the above terminal board with the terminal screw penetrating through
A terminal device for said terminal device, the base on
A cover that covers the terminal board except the tip and middle parts.
The cover has insulation between each phase and the outside.
The cover partition wall is provided with a convex portion extending in the direction of the terminal plate, and the convex portion presses the intermediate portion of the terminal plate to prevent the terminal plate from rising.

Further, the convex portion of the cover is formed so as to shield the mating surface of the base and the cover from the terminal screw.

Further, the convex portion of the cover is provided so as to extend from the cover body between the base partition wall for insulating each phase formed on the base or the outside and the terminal screw.

Further, the terminal plate is provided with a pressing margin portion which is pressed by the convex portion of the cover.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a perspective view of a terminal device of a circuit breaker showing a first embodiment of the present invention. 2 is an enlarged sectional view taken along the line II-II in FIG. FIG. 3 is an exploded perspective view of essential parts of the terminal device shown in FIG. 1. In the figure, the same or corresponding parts as those of the conventional device are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, the cover partition wall 7a for insulating the phases of the cover 7 from each other or to the outside is extended downward from the mating surface 17 of the base 1 and the cover 7 in the direction of the terminal plate 3, and the terminal plate. A convex portion 7d for pressing 3 is formed. On the other hand, the terminal plate 3 is formed with a pressing margin portion 3f at a position facing the convex portion 7d of the cover 7. The cover 7 is firmly fixed to the base 1 with a mounting screw 9. When the terminal device is assembled, the terminal plate 3 is placed on the receiving seat 1d of the base 1 and the cover 7 is assembled, so that the convex portion 7d of the cover 7 presses the pressing margin portion 3f of the terminal plate 3 and the terminal plate 3 Is fixed to the seat 1d of the base 1.

In the terminal device constructed as described above, the outer conductor 8 is sandwiched and clamped between the terminal plate 3 and the pressing plate 6. Therefore, even if the outer conductor 8 is grasped and lifted with a large force or moved up and down, the convex portion 7d of the cover 7 presses the pressing margin portion 3f of the terminal plate 3, so that the terminal plate 3 is fixed to the base 1. It is possible to prevent the terminal plate 3 from being deformed and to prevent the terminal plate 3 from being deformed.

Further, as shown in FIG. 2, the convex portion 7d of the cover 7 presses the pressing margin portion 3f of the terminal plate 3 and forms the base partition wall 1a for insulating between the phases of the base 1 by the convex portion 7d. Cover and mating surface 1 of base 1 and cover 7
Since 7 can be shielded from the terminal screw 4 which is the charging part, the insulation distance between the phases is the distance passing through the gap between the convex portion 7d of the cover 7 and the base partition wall 1a for insulating the phases of the base 1. The insulation distance is longer than that of the conventional device and the insulation can be strengthened.

Further, as shown in FIG. 2, by pressing the pressing margin portion 3f of the terminal plate 3 with the convex portion 7d of the cover 7, both side surfaces of the convex portion 7d in the width direction of the terminal plate 3 are formed on the base 1.
The base partition wall 1a for insulating between phases and the convex portion 7d of the cover 7 have a double insulating wall structure, and the strength of the base partition wall 1a for insulating between phases and the outside is improved.

[0019]

The terminal device of the present invention includes a base, a cover for covering the base, a terminal plate mounted on a seat of the base, a terminal screw penetrating the terminal plate, and the terminal screw. A terminal device in which an outer conductor is connected to a terminal plate by tightening the terminal plate, and a protrusion extending in the terminal plate direction is provided on a partition wall formed to insulate each phase of the cover or the outside. Therefore, the terminal plate is pressed by this convex portion, the terminal plate is firmly fixed, and the terminal plate can be prevented from floating from the seat of the base when the outer conductor is moved, and the terminal plate can be prevented from being deformed. .

Further, since the convex portion of the cover is formed so as to shield the mating surface of the base and the cover from the terminal screw which is the charging portion, the insulation distance is increased and the insulation can be strengthened.

Further, since the convex portion of the cover extends between each phase formed on the base or between the base partition wall for insulating the phase from the outside and the terminal screw, the insulating wall is provided between the phases or to the outside. The double structure of the base and the cover improves the strength of the base partition wall.

[Brief description of drawings]

FIG. 1 is a perspective view showing a terminal device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a main part of the terminal device shown in FIG.

FIG. 4 is a main part perspective view showing a conventional terminal device.

5 is an exploded perspective view of a main part of the terminal device shown in FIG.

6 is a cross-sectional view showing a state in which an external conductor is connected to the terminal device shown in FIG.

7 is a cross-sectional view showing a state in which the terminal plate shown in FIG. 6 is floated.

8 is a sectional view taken along the line VIII-VIII in FIG.

9 is a plan view showing a state in which a plate-shaped outer conductor is connected to the terminal device shown in FIG.

[Explanation of symbols]

1 base, 1a base partition wall, 1d seat, 3 terminal plate, 4 terminal screw, 7 cover, 7a cover partition wall, 7b seat, 7d convex portion, 8 outer conductor, 9 mounting screw.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Setsuo Hosogai 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) References: 3-112881 (JP, U) (58) Survey Selected fields (Int.Cl. ⁷ , DB name) H01R 9/00 H01R 9/22

Claims (4)

(57) [Claims] 1. A seat is provided on a base made of an insulating material.
Position the middle part of the terminal plate on this seat, and
The terminal screw that penetrates the middle part of the child board
A terminal device for connecting partial conductors, wherein the terminal device comprises:
On the base, excluding the tip and middle of the terminal board.
Cover for each phase or external
Wherein the terminal plate direction the convex portion is provided which extends, that the convex portion to press the intermediate portion of the terminal board, and to prevent the lifting of the terminal plates to cover the partition wall to perform insulation between the And terminal device. 2. The terminal device according to claim 1, wherein the convex portion of the cover is formed so as to shield the mating surface of the base and the cover from the terminal screw. 3. The convex portion of the cover is provided so as to extend from the cover body between a terminal wall and a base partition wall for insulating between each phase formed on the base and the outside. The terminal device according to claim 1 or 2. 4. The terminal device according to claim 1, wherein the terminal plate is provided with a pressing margin portion that is pressed by the convex portion of the cover.