JPH06119868A - Circuit breaker - Google Patents

Abstract

PURPOSE:To enable an 'on/off' display attached to an operation handle to be easily recognized. CONSTITUTION:An operation handle 4 is held on a circuit breaker cover 2 in such a way as movable linearly along the upper surface thereof, and the disc type head of a handle lever 5 is combined with the groove 7 of the handle 4 in such a way as movable. As a result, the motion of the handle 4 during 'on/off' operation becomes linear, and an 'on/off' indication marked on the upper surface of the handle 4 becomes easy to watch, compared with the conventional constitution where a handle performs circular arc motion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker such as a circuit breaker for wiring or an earth leakage breaker, and more particularly to improvement of an operating mechanism.

[0002]

2. Description of the Related Art As shown in FIG. 5, the circuit breaker generally has an opening / closing mechanism 3 housed in an insulating container composed of a case 1 and a cover 2, and an operating handle 4 projecting from the cover 2 is reciprocated back and forth. Operate the handle lever 5 of the opening / closing mechanism 3
Is rotated about a fulcrum 6 to open and close a movable contact (not shown). The operation handle 4 is integrally fixed to the head of the handle lever 5 by being fitted,
As the handle lever 5 rotates, it makes an arcuate movement as shown by an arrow to an on / off position indicated by a chain line (for details, see, for example, JP-A-57-98945). The front and rear arc surfaces of the handle 4a of the operation handle 4 are provided with an indication indicating the on / off state of the circuit breaker.

[0003]

However, the conventional structure in which the operation handle and the handle lever are integrated has the following drawbacks. (1) Since the display surface of the operation handle with the on / off display is an arc surface, the display is difficult to see when viewed from the front of the circuit breaker. (2) The movable range of the operating handle accompanying the rotation of the handle lever is large, which hinders the downsizing of the circuit breaker. Therefore, an object of the present invention is to provide a circuit breaker that solves the above problems by movably combining an operating handle and a handle lever.

[0004]

In order to achieve the above object, the present invention movably combines an operating handle and a handle lever via a flat surface formed on one side and an arc surface formed on the other side. The operation lever is linearly moved in parallel with the upper surface of the cover to rotate the handle lever. In that case, it is preferable to form a U-shaped groove in the operation handle and fit the circular head portion of the handle lever into the groove. Further, it is preferable that the cover guides the movement of the operation handle.

[0005]

The operation handle and the handle lever are not integrated, but they are movably combined via a plane and an arc surface, and the handle lever is rotated by the linear movement of the operation handle. The linear movement of the operation handle makes the on / off display surface flat so that the display is easy to see, and the movable range of the operation handle is reduced to make the circuit breaker compact.

[0006]

1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of an operating handle and a handle lever. In the figure, the operation handle 4 of the resin molded product is a flat plate-shaped main body 4b.
Has a handle 4a on its upper part, and a U-shaped groove 7 is formed on the lower surface by a pair of front and rear plates. The operation handle 4 is sandwiched between the cover 2 and a support plate 8 fitted therein, and is slidably held.
It is guided by and moves linearly back and forth in parallel with its upper surface. As shown in FIG. 3, characters "ON" and "OFF" indicating the open / closed state of the circuit breaker are engraved on the upper surface of the main body 4b.

On the other hand, the handle lever 5 made of an iron plate is composed of a main body 5a bent in a gate shape and a pair of left and right corners 5b fixed to both shoulders by rivets 9, and the plate 5b has a circular upper end. Handle lever 5 formed
Make up the head. The handle lever 5 is formed with semicircular notches at the ends of both legs of the main body 5a, and is rotatably supported by the support protrusions 6 on both side surfaces of the frame of the opening / closing mechanism 3 through the notches. The circular head portion of the handle lever 5 is fitted into the groove 7 of the operation handle 4 held by the cover 2 when the cover 2 is mounted on the case 1 as illustrated. The diameter of this head is slightly smaller than the width of the groove 7, and its arcuate surface and the planes of the front and rear walls of the groove 7 are in slidable contact.

In FIG. 1, the circuit breaker is in a trip condition. From this state, the handle 4a protruding outward from the window 10 of the cover 2 is moved to the right in the figure, and the handle lever 5 is rotated clockwise around the support projection 6 as a fulcrum in the figure. If the latch does not engage with the latch receiver, the opening / closing mechanism 3 is reset. Next, move the operation handle 4 to the left to the position indicated by the chain line, and move the handle lever 5
When is rotated counterclockwise, the movable contactor (not shown) is closed and the circuit breaker is turned on. At this time, the character "ON" of the operation handle 4 can be seen from the window 10 of the cover 2. When the operating handle 4 is moved to the right from the state to the chain line position and the handle lever 5 is rotated clockwise, the movable contact is opened and the circuit breaker is turned off. At this time, from the window 9 of the cover 2, the operation handle 4
You can see the letters "OFF". When the circuit breaker trips in the ON state, the movable contactor is opened, and the handle lever 5 and the operation handle 4 move to the positions shown in the figure and stop.

In FIG. 3, the corner 5b of the handle lever 5 is attached to the main body 5
It shows an embodiment integrally formed by cutting and raising from a. As a result, it is not necessary to separately fix the corner 5b, which simplifies the manufacture. Further, FIG. 4 shows an embodiment in which a round bar 11 is attached through the left and right corners 5b to form a circular head, and the circular head is fitted into the groove of the operation handle 4. This embodiment is suitable when the load applied during opening / closing is large. In the configuration described above, "ON" and "OF"
Since the on / off display surface of the operating handle 4 on which the letter "F" is engraved is flat, the display in each state can be seen well from the front. Also, the movable range of the operating handle 4 shown by the chain line has a conventional arc motion configuration. In comparison with the above embodiment, the operation handle side is a flat surface and the handle lever side is an arc surface, which are combined, but the operation handle side is an arc surface. The side may be flat.

[0010]

According to the present invention, the operating handle is movably combined with the handle lever, and the operating handle is configured to move linearly along the upper surface of the cover. The on / off display of can be easily seen from the front of the circuit breaker. Further, the movable space of the operation handle becomes small, which is advantageous for downsizing the circuit breaker.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a circuit breaker showing an embodiment of the present invention.

FIG. 2 is a perspective view of an operation handle and a handle lever in FIG.

FIG. 3 is a perspective view of a handle lever showing another embodiment of the present invention.

FIG. 4 is a perspective view of a handle lever showing still another embodiment of the present invention.

FIG. 5 is a schematic vertical sectional view of a conventional circuit breaker.

[Explanation of symbols]

 1 Case 2 Cover 3 Opening / Closing Mechanism 4 Operation Handle 5 Handle Lever 7 Groove 8 Support Plate

Claims (3)

[Claims] 1. A circuit breaker in which an operating handle protruding from a cover is reciprocated back and forth to pivot a handle lever to open and close a movable contactor, wherein an operating handle and a handle lever are formed on one of these. A circuit breaker characterized by being movably combined through a flat surface and an arcuate surface formed on the other side so that the operation handle is linearly moved in parallel with the upper surface of the cover to rotate the handle lever. 2. The circuit breaker according to claim 1, wherein a U-shaped groove is formed in the operation handle, and a cylindrical head portion of the handle lever is fitted into the groove. 3. The circuit breaker according to claim 1, wherein the movement of the operating handle is guided by the cover.