JPH06101293B2 - Circuit breaker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and more particularly to an improvement in coil end connection of an electromagnetic device for detecting overcurrent.

[Conventional technology]

FIGS. 4 to 7 are views showing a conventional circuit breaker disclosed in, for example, Japanese Utility Model Laid-Open No. 55-63052, FIG. 4 is a vertical sectional side view showing an off state, and FIG. 5 is an on state. FIG. 6 is a side view of a part of a vertical section showing the state of FIG. 6, FIG. 6 is a side view of a part of a vertical section showing a trip state, and FIG. 7 is a perspective view of the connecting portion of the exciting coil of FIG. In the figure, (1) is a circuit breaker case made of an insulating material, which is composed of a base (1a) and a cover (1b). (2) is a fixed conductor having one end screwed with a terminal screw (3) for connecting an external electric wire (not shown) and the other end fixed with a fixed contact (4), which is attached to the base (1a). . (5) is a movable contact having a fixed contact (4) and a movable contact (6) that makes contact and disconnection movement, and (7) is a push plate made of an insulating material, which slides along the groove of the base (1a). Then, the movable contactor (5) is opened and closed. (8) is a frame
It is attached to the base (1a) to support a mechanism section for opening and closing and has an elongated hole (8a) to regulate the upper limit of the push plate (7). (9) is a manual handle made of insulating material, with a pin (1
It is pivotally attached to the frame (8) at 0). Reference numeral (11) is a shape link, one end of which is rotatably connected to the manual handle (9) by a pin (12) and slides along an elongated hole (8a) of the frame (8), and the other end of which is a push plate. Pin (1) that can be engaged and disengaged with (7)
It is engaged in 2). (14) is a pulling spring, and (15) is a lever, which is pivotally attached to the frame (8) at the same time as the manual handle (9) by the pin (10) and engages the push plate (7) and the link (11). The component component of the force generated in (1) is transmitted to the overcurrent detection electromagnetic device (described later), and the engagement between the push plate (7) and the link (11) is maintained. (16) is a trip bar, and (17) is a latch rotated by the trip bar (16), which is engaged with the lever (15). Reference numeral (18) is an electromagnetic device for detecting overcurrent, which has an iron piece (19) at one end and which is not shown in the drawing, but a plunger made of a magnetic material is applied to the iron piece (19) against the braking oil and the compression spring. ) And a container (20) made of a non-magnetic material movably provided on the side, and an exciting coil (21) wound around the container (20) and magnetizing the plunger to move the iron piece (19) side. , A substantially L-shaped yoke (22) having a container (20) fixed to a horizontal portion (22a) and an iron piece (rotatably supported by the upper end of a vertical portion (22b) of the yoke (22). 1
9) The movable iron piece (23) that is attracted to this movable iron piece (2)
3) The output piece (24) protruding downward from the end on the base side of the yoke (22) on the outer side of the vertical portion of the yoke (22) and the movable iron piece (23) are connected to the iron piece (1
9) and an elastic member (25) which is separated from it. (26) is a shunt connecting one end (21a) of the exciting coil (21) and the movable contact (5), and (27) is a terminal plate connected to the other end (21b) of the exciting coil (21). , A terminal screw (28) for connecting an external electric wire (not shown) is screwed.
Reference numeral (29) is a separation spring for separating the movable contact (6) from the fixed contact (4).

Next, the operation will be described. First, the operation from "off" to "on" will be described with reference to FIG. When the manual handle (9) is pushed in the direction of the arrow (30) shown, the manual handle (9) rotates about the pin (10), and the link (11) connected to the end by the pin (12) is attached. Interlock along the long hole (8a) of the frame (8). Then the link (11)
Is engaged with the push plate (7) by the pin (13), and when the manual handle (9) is gradually moved, the pin (13) engages with the push plate (7) and moves toward the opening spring (29). It overcomes the reaction force and transmits the component force generated in the engaging portion to the lever (15).
However, since the rotation of the lever (15) is suppressed by the latch (17), the pin (13) is kept held while sliding the lever (15) while the groove of the base (1a) is kept. The push plate (7) which is fitted into the push plate is pushed downward in FIG. Therefore, when the push plate (7) moves, the movable contactor (5) supported by the end portion of the push plate (7) receives the reaction force of the opening spring (29) and the overcurrent detection electromagnetic device. Since one end is releasably engaged with the (18), it rotates in the direction of contacting the fixed contact (4) with that position as a fulcrum.
Thus, the movable contact (6) comes into contact with the fixed contact (4), and at the same time, the joint between the two contacts (4) and (6) serves as the pivotal fulcrum of the movable contact (5). Furthermore, a manual handle (9)
When is pressed, the movable contactor (5) rotates around the above-mentioned joint portion, and when the pin (12) reaches the right end of the elongated hole (8a) of the frame (8), the “off” → “on” operation is performed. To complete. At this time, the reaction force of the opening spring (29) acts on the engaging portion between the push plate (7) and the pin (13), and the component force thereof is further reduced by the pin (1
2) is pressed against the end face of the long hole (8a) of the frame (8). By configuring this link mechanism, all the mechanisms including the manual handle (9) are stationary, and this state can be maintained.

Next, referring to FIG. 5, the operation of “on” → “off” will be described. First, when the manual handle (9) is pressed in the direction of the arrow (31) in the figure, the pin (10), the pin (12) and the pin (13) are aligned. In this step, the movable contactor (5) is slightly pushed down. However, when the pin (12) is moved from this line to the left in FIG. 5, the engaging portion between the push plate (7) and the link (11) which receives the reaction force of the opening / closing spring (29). The direction of the component force acting on starts to work to rotate the manual handle (9) in the direction of the arrow (31) shown. Furthermore, when the manual handle (9) is moved in the direction of the arrow (31), the link (11) connected to the end of the manual handle (9) by the pin (12) also moves to the frame (8).
Sliding to the left in Fig. 5 through the elongated hole (8a), and as a result, the pin (13) is pulled up,
The push plate (7) and the movable contactor (5) are restored, the movable contactor (5) is received, and finally the movable contact (6) is shown. The fixed contact (4) is separated, and the state shown in FIG. 4 is restored. During this time, the lever (15) continues to engage with the overcurrent detection electromagnetic device (18) and is held, so that it remains stationary without rotating. Further, since the force of the pulling spring (14) holding the manual handle (9) is weaker than the restoring force of the manual handle (9) by the opening spring (29), the manual handle (9) returns to the "off" state. To do.

Next, the “on” → “trip” operation will be described.
FIG. 5 is a diagram showing an ON state. Here, fixed contact (2) → movable contact (5) from an external electric wire (not shown)
→ Shunt (26) → Overcurrent detection electromagnetic device (18) → Terminal plate (27) → Assuming that an abnormal current flows through an external wire (not shown), the movable iron piece whose suction side is attracted by the container (20) (23) rotates clockwise against the pull spring (25), the trip side operates the trip bar (16), and the latch (17) comes off the lever (15). The device (18) releases the engagement and retention with the lever (15). As a result, the reaction force of the opening spring (29) is applied to the lever (15) as a component force of the engaging portion between the push plate (7) and the pin (13), so that the lever (15) moves to the pin (10). It receives a rotation moment (in the direction of arrow (32) in FIG. 5) about and rotates. Therefore, the pin (13) loses its engagement and retention, and the end surface of the push plate (7) slides down due to the component force of the engaging portion, resulting in the state shown in FIG. At the same time, since the push plate (7) receives the reaction force of the opening spring (29) via the movable contact (5), it is slid along the groove of the base (1a) and is moved upward in FIG. Move to. Therefore, the movable contactor (5) is also attached to the push plate (7).
Similarly, when pushed up by the reaction force of the separation spring (29) and one end is engaged, the movable contact (6) and the fixed contact (4) are separated by rotating about that point. Further, the reaction force of the opening spring (29) does not act on the manual handle (9) and the link (11) at all. The manual handle (9) and the pulling spring (14) are positioned so that the hooking point between the pulling spring (14) and the frame (8) and the pin (10) are aligned with each other. Pull back (9). As a matter of course, the link (11) is also pulled back in association with the manual handle (9). This state is as shown in FIG. In this way, the overcurrent trip operation is completed. At this time, the manual handle (9) can be returned by the single pull spring (14) and can be held at the trip position.

[Problems to be Solved by the Invention]

In the conventional circuit breaker as described above, both ends (21a) of the exciting coil (21). Since (21b) is bent and brazed to the shunt (26) and the terminal plate (27) respectively, as shown in FIG. 7, the exciting coil (21), the movable contact (5), the shaft (26). When the terminal plates (27) are arranged in a straight line and brazed by a brazing machine, the electrode direction (longitudinal direction) when brazing the movable contact (5) and the shunt (26) and the exciting coil Both ends of (21) (21
The electrode direction (horizontal direction) when brazing the a) and (21b) to the shunt (26) and the terminal plate (27) was different, and the brazing workability was poor. In addition, both ends (21a) and (21b) of the exciting coil (21) had to be bent, which was troublesome to manufacture the exciting coil (21).

The present invention has been made to solve such a problem, and by making the electrode directions the same, the brazing machine can be easily mounted, and the brazing workability between the both ends of the exciting coil and the shunt and the terminal is improved. An object of the present invention is to obtain a circuit breaker which can be manufactured and which does not require bending of both ends of the exciting coil and facilitates manufacture of the exciting coil.

[Means for Solving the Problems]

In order to achieve the above object, the circuit breaker according to the present invention forms both ends of an exciting coil of an electromagnetic device in a plate surface direction of a terminal, and brazes a terminal and a shunt to both ends of the coil. The electrode directions at the time of brazing are the same.

[Action]

In this invention, since both ends of the exciting coil are formed in the plate surface direction of the terminal and brazed to the terminal and the shunt, the electrode directions at the time of brazing are the same, and bending of both ends of the exciting coil is performed. Is unnecessary.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a vertical side view showing an off state, and FIG.
It is the perspective view which looked at the connection part of the excitation coil of the figure from the back side, and attaches | subjects the same code | symbol to the same part as the said conventional thing, or abbreviate | omits description. In the figure, (21A), (21
B) is both ends of the exciting coil (21) and is formed by extending without bending in the plate surface direction of the terminal plate (27).

In this way, connect both ends (21A) and (21B) of the coil to the terminal plate (2
If it is formed in the plate surface direction of 7), the brazing of the one end (21A) and the shunt (26) and the other end (21B) and the terminal board (2
The electrode direction (longitudinal direction) when brazing with 7) is the same as the electrode direction (longitudinal direction) when brazing the movable contact (5) and shunt (26). It becomes easy to mount on the machine, and the workability of brazing the both ends (21A) and (21B) of the exciting coil (21) with the shunt (26) and the terminal plate (27) is improved. In addition, both ends (21A) of the exciting coil (21),
Excitation coil (21) because bending process of (21B) is not required
Will be easier to manufacture.

Next, as shown in FIG. 3, when the container (20) is soldered (brazing) (33) to the yoke (22), the exciting coil (2)
1), movable contact (5), shunt (26), terminal board (2
Since 7) can be performed in the same vertical direction as the electrode direction when brazing at three places, brazing workability during assembly is significantly improved.

〔The invention's effect〕

As described above, according to the present invention, by making the electrode directions the same, the brazing machine can be easily applied, and the brazing workability between the both ends of the exciting coil and the shunt and the terminal can be improved. The effect of facilitating the manufacture of the exciting coil is obtained without the need for bending both ends.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention in an off state, FIG. 2 is a perspective view of the connecting portion of the exciting coil of FIG. 1 seen from the back side, and FIG. 3 is another embodiment of the present invention. Showing the second
The same figure as FIG. 4, FIG. 4 is a vertical side view showing a conventional state in an off state, FIG. 5 is a side view in a vertical section showing an on state, and FIG. 6 is a side view in a vertical section showing a trip state. FIG. 7 is a perspective view of the connecting portion of the exciting coil of FIG. 4 seen from the back side. In the figure, (4) is a fixed contact, (5) is a movable contact,
(6) is a movable contact, (8) is an electromagnetic device for overcurrent detection,
(19) is an iron piece, (20) is a container, (21) is an exciting coil,
(21A) and (21B) are both ends of the exciting coil, (22) is a yoke, (22a) is a horizontal part of the yoke, (22b) is a vertical part of the yoke,
(23) is a movable iron piece, (24) is an output piece, (25) is an elastic member, (26) is a shunt, and (27) is a terminal. The same reference numerals in the drawings indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsushin Hirakawa 1-8 Midoricho, Fukuyama-shi, Hiroshima Mitsubishi Electric Corporation Fukuyama Manufacturing Co., Ltd. (72) Inventor Toyohei Ishihara 1-8 Midoricho, Fukuyama-shi, Hiroshima Mitsubishi Electric Corporation Company Fukuyama Factory

Claims (1)

[Claims] 1. A movable contact having a movable contact that comes into contact with and separates from a fixed contact, an overcurrent detection electromagnetic device connected to the movable contact by a shunt, and a terminal connected to the electromagnetic device. A non-magnetic circuit breaker provided with the electromagnetic device, wherein a plunger having an iron piece at one end and made of a magnetic material inside is provided movably to the iron piece side against braking oil and a compression spring. A container made of wood,
An exciting coil wound around the container and magnetizing the plunger to move it to the iron piece side, a substantially L-shaped yoke having the container fixed to a horizontal portion, and a coil wound around the upper end of the vertical portion of the yoke. A movable iron piece that is movably supported and sucked by the iron piece, an output piece that protrudes downward from the base side end of the movable iron piece on the outer side of the vertical portion of the yoke, and the movable iron piece that is separated from the iron piece. The elastic member to be formed, both ends of the exciting coil are formed in the plate surface direction of the terminal, the terminal and the shunt are brazed to the coil both ends, and the electrode direction at each brazing is A circuit breaker characterized in that they are identical.