KR100914203B1 - Mold cased circuit breaker with a contact on mechanism - Google Patents

Abstract

The present invention relates to a circuit breaker, wherein a wiring breaker having a CONTACT ON mechanism for automatically driving the handle toward the on position or the on position when the handle is operated to the reset (off) position when the contact is fused. To provide, the contact on mechanism is guided in accordance with the operation of the opening and closing mechanism (CONTACT ON) plate, the trip bar (TRIP BAR), which can drive the restraint mechanism to the restraint release position, the handle A lever connected to and fixed to the lever to provide a rotation point of the handle, the lever pin and the restraint mechanism for pressing the trip bar to drive the restraint mechanism to the restraint position by operating the restraint mechanism to the restraint position by pressing the trip bar to the restraint position. When the opening mechanism is configured to include a trip spring for providing an elastic driving force to operate in the trip position.

Circuit Breaker, Contact On, Trip Bar, Contact On Plate, Lever, Trip Spring

Description

Circuit breaker with contact on mechanism {MOLD CASED CIRCUIT BREAKER WITH A CONTACT ON MECHANISM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to circuit breakers, and more particularly to circuit breakers having a contact on mechanism.

Circuit breakers are electrical devices that protect circuits and loads by automatically cutting off circuits in the event of an electrical overload or overcurrent condition. In such a circuit breaker, the position of the handle, which is a manual operation mechanism, is a mechanism release, that is, a trip position, and a circuit open position, that is, an OFF position (also called a reset position) by the switching mechanism. And, it may be divided into a closed position, that is, an ON position. If an accidental current such as abnormal current occurs, the circuit breaker trips and the handle indicates other positions except the on position. On the other hand, when the contacts of the movable contactor and the fixed contactor are fused (melted and stuck) or the contacts of the movable contactor and the fixed contactor do not open to each other due to other causes, the user operates the handle to energize the wiring breaker. In other words, when operating to the reset position, that is, to the OFF position in order to operate to the ON position. The handle does not indicate the off position (not in the off position), but automatically indicates the on position or the on-side position, indicating that the contact between the current movable contact and the fixed contact is in energized state (alert to the user). Become) Such an operation (function) is called a contact on operation (function), and the present invention is to provide a circuit breaker having a mechanism for performing such a contact on operation (function) in the wiring breaker.

In this case, when the contact is in the energized state, the handle automatically displays the on position, that is, a power transmission mechanism connected between the handle and the shaft that supports and drives the movable contact to implement the contact on operation (function). In the upper link and the lower link, the position of the toggle pin, which is the connecting means of the upper link and the lower link, is determined by the lever hinge point (ie, lever axis of rotation of the lever) of the lever supporting the rotation of the handle. Be in a location that does not exceed the location. In other words, the position of the toggle pin should be to the left of the position of the lever hinge point (lever axis of rotation) when viewed from the front. On the other hand, when the tripping state, the position of the toddle pin should be located on the right side of the position beyond the lever hinge point, that is, the lever hinge point, so that the position during the contact on operation and the position in the trip state are opposite to each other.

There is a need to adjust the position and length ratios of the nodes of the upper link and the lower link to implement both contact-on and tripping operations. Therefore, in order to satisfy the opposing position conditions, an unstable opening state can be caused. There is a structural problem that can be.

In addition, by installing a separate stopper (stopper) by restraining the lever to force the handle to go to the off position can also be devised, in this case, the handle is stopped in the near or trip position, even if not in the off position, This is a problem in that the handle automatically displays the on position when the contact is in contact, i.e., the result does not implement a contact on operation (function).

Accordingly, the present invention solves the problems of the prior art, the object of the present invention is to provide a contact on function by implementing a separate mechanism is stable without causing an unstable state of the opening and closing mechanism, without installing a stopper accurately It is to provide a circuit breaker having a contact on mechanism capable of indicating the on position of the handle.

The object of the present invention is a fixed contactor, a movable contactor movable to a position contacted or separated from the fixed contactor, an opening and closing mechanism for opening and closing a circuit by driving the movable contactor to contact or separate from the fixed contactor; A circuit breaker comprising a restraining mechanism for restraining a mechanism and a handle for manually opening and closing the opening and closing mechanism,

When operating the handle to the off position or the reset position in a state where the contact of the movable contactor and the fixed contactor is fused, release the restraint of the restraint mechanism to trip the open / close mechanism and display the energized state. It can be achieved by providing a circuit breaker according to the invention, comprising a contact on mechanism for automatically rotating the handle to the on position even in the absence of hydraulic power.

It is also an object of the present invention to display an ON position which is a position for closing a circuit to which a wiring circuit breaker is connected or an OFF position which is a position at which the connected circuit is interrupted, and to operate the wiring circuit breaker manually. A lever for providing a manual operation unit for the control unit, a lever having one end connected to the handle and rotatable together with the movement of the handle and providing a rotation point to the handle, the lever connected to the other end of the lever A rotation support shaft providing a rotation point of the side, a side plate for fixedly supporting the rotation support shaft, a fixed contact connected to a power source or a load side, a position contacting the fixed contact and a position separated from the fixed contact. A rotatable movable contactor and a shaft supporting the movable contactor and providing rotational driving force to the movable contactor A pair of shaft rotation pins connected to the shaft and rotating together for simultaneously driving a plurality of movable contacts; a lower link connected to the shaft to provide a rotational driving force to the shaft; Both ends of the upper link to be connected, the toggle pin connecting the upper end of the lower link and the lower end of the upper link, and the toggle pin and the handle, respectively, are supported at both ends to reduce elastic force in the on position. Iii) a trip spring which provides a rotational driving force to the shaft by precipitating the elastic force accumulated during the trip operation, a latch for restraining the trip spring to maintain the extended state, and the latch A latch holder (LATCH HOLDER) rotatable in a restraining position and a position for releasing restraint of the latch, and in a rotation trajectory of the latch holder By pressing the latch holder group according to the molded case circuit breaker having the nail (NAIL) that can be driven to rotate,

A CONTACT ON plate, the lower end of which is drive-connected to one of the pair of shaft rotation pins and is guided in accordance with the rotation of the shaft rotation pins and movable vertically;

A trip bar (TRIP BAR) connected to an upper end of the contact on plate so as to be rotatable with the upper end of the contact on plate as a rotation point, and freely rotated to release the restraint on the nail; And

The nail is fixed to the lever and presses the trip bar when operating the handle to the off position or the reset position while the contact of the movable contactor and the contact of the fixed contactor are fused at the on position. It includes a lever pin that rotates to trip the circuit breaker,

In this case, after the trip operation is performed by operating the handle to an off position or a reset position in a state where the contact of the movable contactor and the contact of the fixed contactor are fused, even when there is no hydraulic power to display an energized state. In order to provide an elastic force to automatically rotate the handle toward the on position, the horizontal position of the toggle pin supporting the lower end of the trip spring is positioned not to exceed the horizontal position of the rotation support shaft. It can be achieved by providing a circuit breaker according to.

By providing a circuit breaker having a contact on mechanism according to the present invention, by providing a separate mechanism to implement a contact on function has the effect of obtaining a circuit breaker that operates stably without causing an unstable state of the switchgear mechanism have. In addition, there is an effect that a circuit breaker having a contact-on mechanism capable of accurately indicating the on-handle position without installing a stopper can be obtained.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following detailed description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 is a configuration and operation of an ON state of a circuit breaker according to the present invention with reference to FIGS. 1 and 2, which are shown in front and perspective views, respectively, of a main portion of a circuit breaker in an ON state having a contact-on mechanism according to the present invention. This is as follows.

The circuit breaker according to the present invention has a pair of fixed contacts 1a and 1b, which are common components in a known configuration, and a movable contactor 2 movable to a position in contact with or separated from the fixed contacts 1a and 1b. Opening / closing mechanisms 3, 3-1a, 3-1b, 4a, 4b, 4c, 6, 7, 8, for driving the movable contactor 2 in contact or separation with the fixed contactors 1a and 1b 9), restraining mechanisms 12, 13, and 14 for restraining the opening and closing mechanism, and a handle 6 for manually opening and closing the opening and closing mechanism.

The circuit breaker according to the present invention is a characteristic configuration, and the handle 6 is operated to the OFF position or the RESET position in a state in which the contacts of the movable contactor 2 and the fixed contactors 1a and 1b are fused. Releases the restraint of the restraint mechanisms 12, 13, and 14, trips the open / close mechanisms 3, 3-1a, 3-1b, 4a, 4b, 4c, 6, 7, 8, and 9 and energizes them. And a contact on mechanism (7, 7-1, 9, 10, 11) which automatically rotates the handle (6) to the on position even when there is no hydraulic power to display.

More specifically, the wiring breaker according to the present invention may display an ON position which is a position for closing a circuit to which a wiring circuit breaker is connected or an OFF position that is a position for blocking the connected circuit. A handle 6 which provides a manual operation for manual operation.

In addition, the wiring breaker according to the present invention, which is included in the opening and closing mechanism, has one end connected to the handle 6, and is rotatable together with the movement of the handle 6 and provides a rotation point to the handle 6. LEVER 7 is included.

In addition, the circuit breaker for wiring according to the present invention, which is included in the opening / closing mechanism, is connected to the other end of the lever 7 to provide a rotation point of the lever 7, and a rotation support shaft 8. ) And the side plate (5) fixedly supporting. Here, the rotation support shaft 8 may be composed of, for example, a rivet that is fixedly supported on the side plate.

The circuit breaker according to the present invention is also rotated to a position where the fixed contactors 1a and 1b are connected to the power supply or the load side, a position contacting the fixed contactors 1a and 1b, and a position separated from the fixed contactors 1a and 1b. A movable contactor 2, a shaft 3 supporting the movable contactor 2 as included in the opening and closing mechanism and providing a rotational driving force to the movable contactor 2, and a plurality of phases or poles It comprises a pair of shaft rotation pins 3-1a, 3-1b connected to the shaft 3 and rotating together for simultaneously driving the movable contact 2 of the pole.

In addition, the circuit breaker for wiring according to the present invention, which is included in the opening and closing mechanism, is connected to the lower link 4a and the lower link 4a, the lower end of which is connected to the shaft 3 to provide a rotational driving force to the shaft 3. Toggle pins 4c for connecting the upper link 4b, the upper end of the lower link 4a, and the lower end of the upper link 4b, the toggle pin 4c and the handle 6, respectively. It includes a trip spring 9 which is supported at both ends to accumulate the elastic force in the on position and to provide the rotational driving force to the shaft 3 by amplifying the elastic force in the trip operation.

In addition, the circuit breaker according to the present invention, which is included in the restraint mechanism, includes a latch 14 for restraining the trip spring 9 to maintain the extended state, and a position for restraining the latch 14. A nail holder 13, which is rotatable to a position to release the restraint of the latch 14, and a nail which is installed in the rotational trajectory of the latch holder 13 and which can pressurize and drive the latch holder 13, NAIL) 12 is provided.

In addition, the circuit breaker according to the present invention includes the contact on mechanism as a characteristic configuration, wherein the contact on mechanism has a lower end of one of the pair of shaft rotation pins 3-1a and 3-1b (3-1b). A contact on plate 10 which is driven and connected to the shaft rotation pin 3-1b and is movable vertically, and the upper end of the contact on plate 10 is rotated. Fixed to the trip bar (TRIP BAR) 11 and the lever (7) connected to the upper end of the contact on plate 10 so as to be rotatable and capable of rotating by releasing the restraint on the nail 12. Presses the trip bar 11 when the handle 6 is operated to the off position or the reset position while the contact of the movable contact 2 and the contact of the fixed contact 1a and 1b are fused. And a lever pin 7-1 for rotating the wiring breaker by rotating 12). .

The lever pin 7-1 may be configured as a separate pin or may be configured as a protruding protrusion formed by embossing a corresponding position of the lever 7.

Here, when the contact of the movable contact 2 and the contact of the fixed contact 1a, 1b are unopened for fusion or other reasons, the user operates the handle 6 to the off position or the reset position to perform a trip operation. Trip spring to provide the resilient force to automatically rotate the handle 6 to the on position even when there is no hydraulic power, i.e., the user releases the handle 6 to indicate that the circuit breaker is energized. The horizontal position of the toggle pin 4c supporting the lower end of the (9) does not exceed the horizontal position of the rotation support shaft 8, that is, the horizontal position of the toggle pin 4c in FIG. It is located on the left side of the shaft (8).

In order to guide the contact on plate 10 to move vertically in accordance with the rotation of the shaft rotation pin 3-1b, the side plate 5 is a vertical guide hole for guiding the shaft rotation pin 3-1b. (5-3), the side plate (5) has a stop pin (5-1) that protrudes and determines the upper limit of movement of the contact on plate (10), and the contact on plate (10) has a stop pin ( The long groove part 10c which surrounds 5-1 and which the upward movement of the contact-on plate 10 is restrict | limited by the stop pin 5-1 is provided.

On the other hand, with reference to Figures 6 and 7 will be described in more detail the configuration of the contact on the plate 10 and the trip bar 11 according to the present invention.

As shown in FIG. 6, a boss part serving as a rotation support shaft is disposed at the upper end of the contact on plate 10 so that the trip bar can rotate by rotating the upper end of the contact on plate 10 as a rotation point. 10d), the trip bar 11 is provided with a bearing groove portion 11d corresponding to the boss portion 10d as shown in FIG.

In more detail, as shown in FIG. 6, the contact-on plate 10 is provided with a pin hole 10b at the lower end in the longitudinal direction, and the pin hole 10b has a shaft (see symbol 3 in FIG. 1). Shaft rotation pin (3-1b) of the () is inserted for interlocking, is provided with a long groove portion (10c) to extend in the longitudinal direction from the center portion in the longitudinal direction, the trip bar 11 in the upper portion in the longitudinal direction A boss part 10d serving as the pivoting axis of the trip bar 11 and a flange connection part 10a extending radially from the boss part 10d are provided to support the pivotably. do.

In addition, as shown in FIG. 7, the trip bar 11 includes a water-receiving recess 11d receiving the boss 10d of the contact-on plate 10 as a water-reducing portion at a central portion in the longitudinal direction, and a contact-on. And a flange receiving jaw portion 11b for receiving the flange portion 10a for seating connection of the plate 10, extending upwardly from the center portion in the longitudinal direction to restrain the nail (see numeral 12 in FIG. 1). It is provided with a nail restraining portion (11c) that can be rotated to act in a position to release or restraint. In addition, the trip bar 11 extends laterally from the center portion in the longitudinal direction to receive the rotational driving force from the lever pin (see reference numeral 7-1 of FIG. 1) of the lever (see reference numeral 7-1 of FIG. 1). It comprises a receiving portion (11a) and a balance weight portion (11e) extending downward from the central portion in the longitudinal direction to serve as a balance weight.

Meanwhile, referring to FIGS. 1 and 2, the operation of the circuit breaker according to the present invention when operating the handle from the off position to the on position as shown in FIG. 3 is as follows.

In the off position (that is, the reset position) as shown in FIG. 3, when the user manipulates the handle 6 to the on position by hydraulic power while the user grips the handle 6, the one end of the trip spring 9 is supported. As the toggle pin 4c moves downward at an angle, the trip spring 9 is tensioned to accumulate elastic energy.

The oblique downward movement of the toggle pin 4c causes the lower link 4a and the upper link 4b to be folded as shown in FIG. 1.

At this time, the lower link 4a moves downward as shown in FIG. 1 by the oblique downward movement of the toggle pin 4c, and the shaft rotation pin 3-1a on the left side of FIG. 1 rotates counterclockwise. do.

Accordingly, the other shaft rotating pins 3-1b, which are located on the opposite sides of the diameter of the shaft 3, also rotate counterclockwise to be in the raised position as shown in FIG.

As the other shaft rotation pin 3-1b moves to the raised position as shown in FIG. 1, the contact on plate 10, one end of which is connected to the other shaft rotation pin 3-1b, is connected to the side plate. It is guided by the guide long hole 5-3 formed in (5), the stop pin 5-1, and the long groove part 10c, and rises in a vertical direction.

On the other hand, since the latch 14 is restrained by the latch holder 13 in the reset (that is, off) position as shown in FIG. 3, only the lever 7 is counterclockwise in accordance with the on-position operation of the handle 6. Direction left or right in FIG. 1 or FIG. 2, so that the lever pin 7-1 fixed to the lever 7 also moves counterclockwise in the left direction in FIG. 1 or FIG. 2 and as shown in FIG. 7-1) is in a state of being separated from the trip bar 11 (separated).

At this time, by the counterclockwise rotation of the shaft 3, the movable contactor 2 is brought into contact with the fixed contactors 1a and 1b, so that both the fixed contactors 1a and 1b are electrically connected to each other. The circuit between the load side and the load side becomes a closed circuit and thus becomes energized.

Meanwhile, referring to FIG. 3, the OFF operation of the circuit breaker having the contact on mechanism according to the present invention will be described below.

When the handle 6 is operated in the off position by hydraulic power while the user grips the handle 6 in the on position shown in FIG. 1 or in the trip position in which the handle 6 is located at the center, the trip spring An upper end portion of (not shown, reference numeral 9 in FIG. 1) is moved to the right side in FIG. 3.

The trip spring then acts as a resilient restoring force to restore its posture in a straight line so that its lower end moves to the right in the drawing, and thus a toggle pin (not shown, reference numeral 4c in FIG. 1) supports the lower end of the trip spring. It is moved to the right.

Thus, while the upper link 4b and the lower link (not shown, see reference numeral 4a in FIG. 1) are folded, that is, the upper link 4b rotates counterclockwise and the lower link rotates clockwise so that the shaft 3 Rotates in the clockwise direction, whereby the movable contact 2 is in an off state (circuit break) in which it is opened from the fixed contacts 1a and 1b.

At this time, since the latch 14 is constrained by the latch holder 13, the trip spring (see reference numeral 9 of FIG. 1) is kept in a tensioned state to maintain the elastic energy in a condensed state and thus one end of the tensioned trip spring. Toggle pins (see 4c in FIG. 1, not shown) that support them move beyond the rotational support shaft 8 of the lever 7 to the right.

The lower link and the upper link 4b are further folded than the state shown in FIG. 1 by the right movement of the toggle pin.

That is, the lower link 4a moves upward from the position shown in FIG. 1 by the right movement of the toggle pin 4c, and the shaft rotation pin 3-1a on the left side in FIG. 1 rotates clockwise. .

Accordingly, the other shaft rotation pin 3-1b located on the opposite side of the diameter of the shaft 3 also rotates clockwise to be in a lowered position as opposed to that shown in FIG.

As the other shaft rotation pin (see reference numeral 3-1b in FIG. 1) moves to the lowered position as shown in FIG. 3, the contact on plate 10 having one end driven connected to the other shaft rotation pin is It is guided by the guide long hole 5-3, the stop pin 5-1, and the long groove portion 10c formed in the plate 5, and lowered in the vertical direction.

On the other hand, since the latch 14 is restrained by the latch holder 13 in the reset (that is, off) position as shown in FIG. 3, only the lever 7 is clockwise in accordance with the off position operation of the handle 6. In other words, it moves in the right direction in FIG. 3, so that the lever pin 7-1 fixed to the lever 7 also moves in the clockwise direction in FIG. 3. At this time, since the contact on plate 10 moves downward, the trip bar 11 connected to the upper end of the contact on plate 10 is also lowered, and as shown in FIG. 3, the lever pin 7-1 is the trip bar 11. It is in a state of being separated (separated) from.

At this time, by the clockwise rotation of the shaft 3, the movable contactor 2 is separated (opened) from the fixed contactors 1a and 1b, and therefore, as the two fixed contactors 1a and 1b are electrically separated from each other. The circuit between the power supply side and the load side is opened and thus energized.

Meanwhile, the contact on operation of the circuit breaker according to the present invention will be described with reference to FIGS. 4 and 5.

Fig. 4 is a front view showing the contact on operation in the contact welding state as a front view of the main part of the circuit breaker having the contact on mechanism according to the present invention, and Fig. 5 is the main part of the circuit breaker having the contact on mechanism according to the present invention. 4 is a perspective view showing a contact on operation in a contact welding state.

Although the wiring breaker according to the present invention performs a trip operation by an accidental current such as an overcurrent, the handle 6 is in a trip position almost centered as shown in FIG. When the contacts of the fixed contacts 1a and 1b are energized because they are not melted together or opened for other reasons, such as the on position (state), as shown in Fig. 1, the user mistaken the circuit breaker for tripping and You can try to reinject (on).

At this time, in order to operate the circuit breaker in the tripped state in the on position, the handle 6 should be operated in the off position (reset position) first and then in the on position.

Thus, the user first operates the handle 6 to the off position (reset position). The lever 7 connected to the handle 6 is thus rotated clockwise in the off position, ie in the clockwise direction in FIGS. 4 and 5 on the rotational support shaft 8, so that the lever is fixed to the lever 7. The pin 7-1 is also rotated clockwise in other words to the right in FIGS. 4 and 5.

At this time, the contact of the movable contact 2 and the contact of the fixed contact (1a, 1b) is the same as the on position (state) as shown in Fig. 1, the state in which the shaft rotation pin 3-1b of the right side in the drawing is raised Therefore, the contact-on plate 10 and the trip bar 11 are also raised, and are moved to the right side while contacting the lever pin 7-1 with the power receiving portion 11a of the trip bar 11.

Therefore, the trip bar 11 rotates counterclockwise in FIGS. 4 and 5, and the nail on which the bottom surface of the restraint reception part 12a is restrained by the nail restraint part 11c of the trip bar 11. The nail 12 is rotated clockwise in the drawing about the nail pivot axis 12b by the elastic force of the spring (not shown) which elastically supports the nail 12.

Thereby, it is pressed by the lower end part of the rotating nail 12, and the latch holder 13 rotates counterclockwise about the latch holder support shaft 5-3. As the latch holder 13 rotates, the latch 14, which has been restrained (or the release state if a trip has already been made), is released and a trip operation is performed.

After the trip operation is performed by operating the handle 6 to the off position (reset position) in the state where the contact of the movable contactor 2 and the contact of the fixed contactors 1a and 1b are fused, the trip operation is already performed In this case, since the contact point is fused, the toggle pin 4c maintains the position as shown in FIG. 1 so as not to exceed the rotational support shaft 8 in the horizontal direction, that is, as shown in FIGS. 1, 4 and 5. The toggle pin 4c is located on the left side of the shaft 8.

Thus, the upper part of the trip spring 9 whose lower end is supported by the toggle pin 4c is turned to the right by the off position operation of the handle 6, that is, the upper right position operation of FIGS. 4 and 5, and therefore the handle 6 When the) is released from the off position, the upper portion of the trip spring 9 squeezed to the right exerts an elastic restoring force to restore a straight posture with the lower side of the left side so that the handle 6 automatically moves to the on position.

Therefore, the contact on operation is made.

Since the position (state) of the circuit breaker according to the present invention after the contact on operation is performed is the same as the position of the on state shown in FIG. 1 or 2, reference may be made to this.

As described above, according to the present invention, a circuit breaker having a contact on mechanism is reset because a trip operation is performed even if the user attempts to turn off (reset) the handle in a state where the contact is not opened due to contact fusion, etc. When the handle is released, the on position is indicated to inform the user that the circuit breaker is in an energized state so that the user can recognize it and take necessary safety measures.

That is, the user, for example, operates a front circuit breaker such as a main circuit breaker before the circuit breaker to cut off any overcurrent, disconnects the circuit breaker that caused the fault from the wiring, replaces, repairs, or the like. Can be taken.

1 is a front view of a main portion of a circuit breaker having a contact on mechanism according to the present invention, showing a state in which an ON state and a contact on operation are performed;

2 is a perspective view showing a state where a main portion of a circuit breaker having a contact on mechanism according to the present invention is in an ON state and at the same time a contact on operation is performed;

3 is a front view showing an off state as a front view of the main portion of a circuit breaker having a contact on mechanism according to the present invention;

4 is a front view of the main portion of a circuit breaker having a contact on mechanism according to the present invention, which is a front view showing a state in which the handle is operated to an off (reset) position before the start of a contact on operation in a contact welding state,

5 is a perspective view showing the main part of a wiring breaker having a contact on mechanism according to the present invention, showing a state in which the handle is operated to an off (reset) position before the start of a contact on operation in a contact welding state;

Figure 6 is a perspective view of the main parts showing the three-dimensional shape of the contact on the plate of the contact on mechanism in accordance with the present invention in detail,

Figure 7 is a perspective view of the main parts detailing the three-dimensional shape of the trip bar of the contact on mechanism according to the present invention.

* Explanation of symbols on the main parts of the drawings

1a, 1b: fixed contact 2: operation contact

3: shaft 3-1a, 3-1b: shaft rotation pin

4a: lower link 4b: upper link

4c: toggle pin 5: side plate

5-1: Stop Pin 5-2: Latch Holder Rotary Shaft

5-3: Guidance Officer

6: handle 7: lever

7-1: lever pin 8: rotary support shaft

9: trip spring 10: contact on plate

10a: flange part 10b: pin hole

10c: Chapter Home Part 10d: Boss Part

 11: trip bar 11a: power receiver

11b: flange receiving jaw part 11c: nail restraint part

11d: Receiving groove part 12: nail

12a: restraint reception part 12b: nail rotation shaft

13: latch holder

14: latch

Claims (9)

A fixed contactor, a movable contact movable to a position contacted or separated from the fixed contactor, an opening and closing mechanism for opening and closing a circuit by driving the movable contactor to be in contact with or separated from the fixed contactor, and a restraining mechanism for restraining the opening and closing mechanism; In the circuit breaker having a handle for manually opening and closing the opening and closing mechanism, When operating the handle to the off position or the reset position in a state where the contact of the movable contactor and the fixed contactor is fused, release the restraint of the restraint mechanism to trip the open / close mechanism and display the energized state. A contact on mechanism that automatically rotates the handle toward the on position even in the absence of hydraulic power, The contact on mechanism, A contact on plate having one end driven and connected to the opening and closing mechanism, the contact on plate being guided in accordance with the driving of the opening and closing mechanism; A trip bar (TRIP BAR) rotatably connected to an upper end of the contact on plate and capable of driving the restraint mechanism to a restraint release position; A lever connected to the handle and providing a point of rotation of the handle; Fixed to the lever and pressurizing the trip bar when the handle is operated in an off position or a reset position in a state in which the contact of the movable contactor and the contact of the fixed contactor are fused at the on position; A lever pin configured to drive the lock mechanism to a tripped position by driving the valve to a restraint release position; And A trip spring having an upper end connected to the handle and included in the opening / closing mechanism, the trip spring providing an elastic driving force to operate the opening / closing mechanism to the trip position when the restraining mechanism is operated to the restraint release position; In this case, after the trip operation is performed by operating the handle to an off position or a reset position in a state where the contact of the movable contactor and the contact of the fixed contactor are fused, even when there is no hydraulic power to display an energized state. In order to provide the resilient force to automatically rotate the handle toward the on position, the horizontal position of the support point supporting the lower end of the trip spring is positioned not to exceed the horizontal position of the rotational support shaft of the lever. . delete The method of claim 1, The lever pin is a circuit breaker, characterized in that consisting of a separate pin or a protruding protrusion formed by embossing the corresponding position of the lever. A handle that can display an ON position which is a position to close a circuit to which a wiring circuit breaker is connected or an OFF position which is a position to cut off the connected circuit, and a handle providing a manual operation section for manually operating the circuit breaker. And a lever having one end connected to the handle and rotatable together with the movement of the handle and providing a rotation point to the handle, and a rotation connected to the other end of the lever to provide a rotation point of the lever. A support shaft, a side plate fixedly supporting the rotary support shaft, a fixed contactor connected to a power source or a load side, a movable contactor rotatable to a position contacting the fixed contactor and a position separated from the fixed contactor; A shaft for supporting the movable contactor and providing a rotational driving force to the movable contactor, and a plurality of movable contacts A pair of shaft rotation pins connected to the shaft and rotating together for driving the ruler, a lower link connected to the shaft to provide a rotational driving force to the shaft, and an upper link connected to the lower link. Toggle pins connecting the upper end of the lower link and the lower end of the upper link, and both ends of the toggle pin and the handle are respectively supported to reduce the elastic force in the on position and to trip. A trip spring which provides a rotational driving force to the shaft by restraining the elastic force that is accumulated at the time, a latch for restraining the trip spring to maintain the extended state, a position for restraining the latch, and A latch holder (LATCH HOLDER) rotatable to a position to release the restraint of the latch, and installed in the rotational trajectory of the latch holder to pressurize the latch holder In the molded case circuit breaker having the nail (NAIL) that can be driven over rotation, A CONTACT ON plate, the lower end of which is drive-connected to one of the pair of shaft rotation pins and is guided in accordance with the rotation of the shaft rotation pins and movable vertically; A trip bar (TRIP BAR) connected to an upper end of the contact on plate so as to be rotatable with the upper end of the contact on plate as a rotation point, and freely rotated to release the restraint on the nail; And The nail is fixed to the lever and presses the trip bar when operating the handle to the off position or the reset position while the contact of the movable contactor and the contact of the fixed contactor are fused at the on position. It includes a lever pin that rotates to trip the circuit breaker, In this case, after the trip operation is performed by operating the handle to an off position or a reset position in a state where the contact of the movable contactor and the contact of the fixed contactor are fused, even when there is no hydraulic power to display an energized state. In order to provide an elastic force to automatically rotate the handle toward the on position, the horizontal position of the toggle pin supporting the lower end of the trip spring is positioned not to exceed the horizontal position of the rotation support shaft. . The method of claim 4, wherein In order to guide the contact on the plate to move in the vertical direction in accordance with the rotation of the shaft rotation pin, The side plate has a vertical guide hole for guiding the shaft rotation pin, The side plate is provided with a stop pin which protrudes and determines an upper limit of movement of the contact-on plate, And the contact on plate has a long groove portion surrounding the stop pin and the upward movement of the contact on plate is limited by the stop pin. The method of claim 4, wherein So that the trip bar can be rotated using the upper end of the contact on plate as the rotation point, The upper end of the contact on plate is provided with a boss (boss) that is a rotational support shaft, The trip bar is a circuit breaker, characterized in that the bearing groove portion corresponding to the boss portion is provided. The method of claim 4, wherein The contact on plate, An interlocking connection of one shaft rotating pin of the shaft at the lower end in the longitudinal direction; A long groove portion formed to extend upwardly from a central portion in the longitudinal direction of the contact on plate; A boss portion provided at an upper end portion in a longitudinal direction and serving as a rotational axis of the trip bar to rotatably support the trip bar; And And a seating connection flange portion extending radially from the boss portion. The method of claim 7, wherein The trip bar, A bearing groove portion receiving the boss portion of the contact-on plate as a bearing portion at a central portion in the longitudinal direction; A flange receiving jaw portion for receiving a flange portion for seating connection of the contact-on plate; A nail restraining action part extending upwardly from the central portion in the longitudinal direction and capable of rotating and acting on a restraining position or restraining nail; A power receiving unit extending laterally from a central portion in the longitudinal direction and receiving a rotational driving force; And And a balance weight portion extending downward from the central portion in the longitudinal direction to perform a balance weight role. The method of claim 4, wherein The lever pin is a circuit breaker, characterized in that consisting of a separate pin or a protruding protrusion formed by embossing the corresponding position of the lever.

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