JP3985424B2 - Circuit breaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is intended for circuit breakers for the purpose of overcurrent protection of low-voltage power distribution equipment, switch for controlling motors, etc., as an external accessory (optional), ON / OFF state of main circuit contacts, tripping The present invention relates to a circuit breaker equipped with an auxiliary switch and an alarm switch for detecting operation by an electrical signal.
[0002]
[Prior art]
First, taking the circuit breaker as an example, the structure of the breaker body and the structure of a conventional product with an auxiliary switch and alarm switch attached to the case side of the breaker body as an external accessory (optional) are shown in FIG. ) To (c). In the figure, reference numeral 1 denotes a case of a circuit breaker body (resin mold case). The case 1 includes a main circuit cutoff portion 2, an opening / closing mechanism portion 3, a tripping portion 4, an opening / closing operation handle 5, and an opening / closing lever 6. Etc. are equipped. With this configuration, the main circuit contact of the cutoff part 2 is opened and closed via the opening / closing mechanism part 3 and the opening / closing lever 6 by the operation of the handle 5. Further, when an overcurrent flows in the main circuit, the opening / closing mechanism 3 is tripped by the output signal of the tripping section 4 to open the main circuit contact.
[0003]
Here, as shown in FIGS. 5 (b) and 5 (c), the opening / closing mechanism section 3 is opened / closed with the opening / closing operation handle 5 as a toggle link mechanism combining the upper toggle 3a, the lower toggle 3b, the connecting plate 3c, and the opening / closing spring 3d. An assembly of movable contacts (not shown) of the disconnecting portion 2 is connected to the lever 6 and further connected to the tripping portion 4 via a latch 3e and a latch receiver 3f. The main circuit contact is opened / closed by the operation of the opening / closing mechanism section 3.
[0004]
Further, as shown in FIG. 5 (b), the auxiliary switch 7 attached to the case side of the circuit breaker main body as an exterior accessory device has the tip of the operating lever 7a protruding inward from the auxiliary switch 7 at this attachment position. The contact mechanism of the auxiliary switch 7 is opened / closed in conjunction with the opening / closing operation of the main circuit contact by engaging with a groove formed in the connecting plate 3c of the opening / closing mechanism section 3, and the ON / OFF state of the main circuit is detected as an electrical signal. Like to do.
[0005]
On the other hand, as shown in FIG. 5 (c), the alarm switch 8 is mounted on the side of the case 1 so that the operation lever 8a protruding inward of the case faces the side of the latch 3e, and when the circuit breaker is tripped. The tilting latch 3e strikes the operation lever 8a to activate the contact mechanism of the alarm switch 8, and the tripping operation from the alarm switch 8 is detected as an electrical signal.
[0006]
[Problems to be solved by the invention]
By the way, in the conventional structure of the circuit breaker described above, the mounting positions of the auxiliary switch 7 and the alarm switch 8 that are exterior accessory devices are defined so as to be mounted on the same side surface of the case 1. For this purpose, for example, the auxiliary switch 7 and the alarm switch 8 are distributed and mounted on the left and right sides of the circuit breaker body case 1 or the auxiliary switch 7 and the alarm switch 8 are interchanged on the left and right. Cannot handle.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to allow the auxiliary switch and alarm switch attached to the circuit breaker body as an external accessory to be freely combined and mounted on the left and right side surfaces of the circuit breaker body case. The purpose of the present invention is to provide a circuit breaker with improved flexibility.
[0008]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, the opening and closing operating handle of the circuit breaker main body, an opening and closing mechanism for the toggle link mechanism incorporated in the in tandem to overcurrent tripping unit casing assembled to the assembly frame the main circuit contacts with opening and closing operation, and the opening and closing lever rocking that pivotally supported in a direction perpendicular to the said set upright frame to the assembly frame, slidably along the assembly frame of the opening and closing mechanism portion supported And an alarm output plate that slides along the frame by the spring force of the drive spring during the tripping operation , and the opening / closing mechanism is disposed in the case so that the assembly frame is orthogonal to the longitudinal direction of the case. auxiliary switch for detecting an electric signal the oN / OFF state of the main circuit contacts as an exterior accessory device in the longitudinal direction and parallel outer sides of the case, or tripping In the circuit breaker which is adapted to mount the alarm switch for detecting an electric signal,
When forming the shaft coupling portion for transmitting the mechanical output signal of the opening and closing operation on the shaft ends of the opening lever to an auxiliary switch mounted on the outer side surface of the casing bets to be, above the right and left ends of said alarm output plate by shifting the position and shaft coupling portion forming the lever engaging Godan unit for transmitting the mechanical output signal of tripping the alarm switch mounted on the outer side surface of the case and (claim 1) ones.
[0009]
In addition, the auxiliary switch and alarm switch have a unit case and contact mechanism as common parts, and an auxiliary switch type operating lever or alarm output plate lever connected to the shaft joint of the open / close lever on the circuit breaker body side. The auxiliary switch is configured by assembling an alarm switch operating lever that engages with the engaging step, and the auxiliary switch is attached to the case side of the circuit breaker body. The alarm switch connects the operating end of the operating lever to the lever engaging portion of the alarm output plate (claim 2).
[0010]
According to the above configuration, the auxiliary switch and alarm switch attached to the side surface of the circuit breaker body case as an exterior accessory device can be attached to either the left or right side of the case without being restricted by the mounting position. Can flexibly respond to user specifications.
In addition, the accessory device used as an auxiliary switch and alarm switch can be made to function as an auxiliary switch or alarm switch by changing the operation lever with the unit case and contact mechanism as common parts. Can be planned.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on the examples shown in FIGS. In addition, in the figure of an Example, the same code | symbol is attached | subjected to the member corresponding to FIG. 5, and the detailed description is abbreviate | omitted.
First, FIGS. 1 (a) and 1 (b) show a state in which auxiliary switches 7 and alarm switches 8 are distributed and mounted on both the left and right sides of the case 1 of the circuit breaker body as an external accessory of the circuit breaker. Here, the open / close mechanism 6 incorporated in the circuit breaker body is assembled with an open / close lever 6 and an alarm output plate 9 that slides in conjunction with the tripping operation of the circuit breaker. It is shown in 2.
[0012]
That is, in FIGS. 2 (a) to 2 (c), the opening / closing lever 6 has a shaft portion 6a protruding left and right supported by the assembly frame of the opening / closing mechanism portion 3, and is further slit-like at the left and right shaft ends of the shaft portion 6a. A shaft coupling portion 6b is formed which is connected to the operating lever 7a of the auxiliary switch 7 by forming a groove.
On the other hand, the alarm output plate 9 is slidably supported along the assembly frame of the opening / closing mechanism unit 3 and is urged upward by a drive spring (a tension spring) 9a. Locked and held in position. When the opening / closing mechanism 3 is tripped by the trip signal, the locking state of the alarm output plate 9 is released, and the alarm output plate 9 slides upward by the spring force of the drive spring 9a. Here, on the left and right side edges of the alarm output plate 9, engagement step portions 9b that engage with the operation lever 8a of the alarm switch 8 are formed.
[0013]
Next, detailed structures of the auxiliary switch 7 and the alarm switch 8 as the exterior accessory device will be described with reference to FIGS. First, as shown in FIGS. 3 (a) to 3 (c), the auxiliary switch 7 has two sets of left and right contacts, each of which has a pair of terminal pieces a, b, c and a leaf spring type movable contact d on a unit case 7b. The mechanism 7c, the slide-type interlocking plate 7d interposed between the movable contacts of the contact mechanisms 7c arranged on the left and right sides, and one end connected to the interlocking plate 7d, and the other end of the shaft portion sideward from the unit case 7b. The protruding operation lever 7a is incorporated, and the operation lever 7a is mounted on the side surface of the case 1 of the circuit breaker body via the mounting leg pieces 7e provided at the four side corners of the unit case 7b .
[0014]
When the auxiliary switch 7 is attached to the case 1 of the circuit breaker body as shown in FIG. 1, the shaft end of the operation lever 7a protruding sideways from the unit case 7b passes through the shaft hole opened in the side wall of the case 1. And it fits in the shaft coupling part 6b formed in the shaft end of the opening-and-closing lever 6 incorporated in the circuit breaker main body, and both are connected.
On the other hand, the alarm switch 8 includes a unit case 8b, two left and right contact mechanisms 8c incorporated in the unit case, a sliding interlocking plate 8d, and one end of the unit case 8 as shown in FIGS. 4 (a) to 4 (c). The seesaw type operating lever 8a protruding from 8b to the side, the V-shaped relay lever 8e connecting the other end of the operating lever 8a and the interlocking plate 8d, and the four corners of the side surface of the unit case 8b When the alarm switch 8 is attached to the case 1 of the circuit breaker body as shown in FIG. 1 as an assembly with the mounting leg piece 8f, the tip of the operation lever 8a protruding from the unit case 8b to the side is the case 1. Is engaged with lever engaging step portions 9b formed at the left and right ends of the alarm output plate 9 incorporated in the breaker body.
[0015]
With this configuration, when the shaft portion 6a of the opening / closing lever 6 rotates during the opening / closing operation of the circuit breaker, the mechanical output signal is transmitted to the operation lever 7a of the auxiliary switch 7 via the shaft coupling portion 6b of the shaft portion 6a. Then, the ON / OFF state of the circuit breaker is output to the outside as an electrical signal through the contact mechanism 7c that performs a reverse operation following the operation lever 7a. When the circuit breaker is tripped, the alarm output plate 9 slides upward simultaneously with the operation of the opening / closing lever 6 in the circuit breaker body, and the mechanical output signal is transmitted to the alarm switch 8 via the engaging step 9b. Is transmitted to the operation lever 8a to push the lever upward. Thereby, together with the signal output from the auxiliary switch 7, the contact mechanism 8c of the alarm switch 8 is reversed, and the tripping operation of the circuit breaker is output to the outside as an electrical signal.
[0016]
In this case, as described above, the opening / closing lever 6 has the shaft coupling portions 6b at the left and right ends of the shaft portion 6a, and the alarm output plate 9 has the lever engagement step portions 9b at the left and right ends. The auxiliary switch 7 and the alarm switch 8 can be used by being mounted on either the right side surface or the left side surface of the case 1 with respect to the breaker body.
In the illustrated embodiment, the unit case 7b, the contact mechanism 7c and the interlocking plate 7d of the auxiliary switch 7 shown in FIG. 3 and the unit case 8b, the contact mechanism 8c and the interlocking plate 8d of the alarm switch 8 shown in FIG. The same common parts are used, and the auxiliary switch specification operation lever 7a is assembled to this unit case to function as the auxiliary switch 7. The alarm switch specification operation lever 8a and relay lever 8e are assembled to the unit case. By attaching it, it functions as an alarm switch 8.
[0017]
This allows the auxiliary switch 7 and alarm switch 8 to be shared by changing the operation levers 7a and 8a, and the combination of the auxiliary switch and alarm switch can be changed to the user's specifications, such as changing the mounting position of each switch on the left and right. It can be flexibly accommodated.
[0018]
【The invention's effect】
As described above, according to the configuration of the present invention, the auxiliary switch in which the mechanical output signals of the opening / closing operation are attached to the side of the case at both ends of the opening / closing lever combined with the opening / closing mechanism of the circuit breaker body. In addition to forming a shaft coupling portion to transmit to the alarm output plate, the left and right ends of the alarm output plate are shifted from the position of the shaft coupling portion and a mechanical output signal of the tripping operation is transmitted to the alarm switch mounted on the side of the case. By forming the lever engagement step, the auxiliary switch and alarm switch attached to the case side of the circuit breaker body as an external accessory of the circuit breaker can be placed on either the left or right side of the case without any restrictions on the mounting position or combination. It can also be mounted on the side of this, which can flexibly respond to user specifications.
[0019]
In addition, the auxiliary switch and alarm switch according to the present invention can function as an auxiliary switch or an alarm switch by changing the operation lever by using the unit case and the contact mechanism as common parts, thereby making the parts common.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an internal mechanism of a circuit breaker according to an embodiment of the present invention, wherein (a) and (b) are a front view and a plan view with an auxiliary switch and an alarm switch mounted, respectively. 2 is a configuration diagram of the opening / closing mechanism in FIG. 1, (a) is an external perspective view in an assembled state, and (b) and (c) are perspective views of the opening / closing lever and alarm output plate in FIG. 3 is a configuration diagram of the auxiliary switch in FIG. 1, (a) is an internal mechanism diagram thereof, (b) and (c) are a plan view and a side view of FIG. 1 (a), respectively. (A) is the internal mechanism diagram, (b) and (c) are the plan view and side view of FIG. 5 (a), respectively. [FIG. 5] Configuration of a conventional circuit breaker. (A) is a schematic configuration diagram of the circuit breaker body, and (b) and (c) are auxiliary switches and alarm switches as exterior accessory devices mounted on the case side of the circuit breaker body. Diagram illustrating an interaction activity mechanism of the opening and closing mechanism portion of the pitch and breaker body EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Case of a circuit breaker 2 Breaking part 3 Opening / closing mechanism part 4 Tripping part 6 Opening / closing lever 6a Shaft part 6b Shaft coupling part 7 Auxiliary switch 7a Operation lever 7b Unit case 7c Contact mechanism 8 Alarm switch 8a Operation lever 8b Unit case 8c Contact Mechanism 9 Alarm output plate 9b Lever engagement step 9 Alarm switch

Claims (2)

Opening / closing operation handle of the circuit breaker main body, opening / closing mechanism part assembled in the assembly frame with the toggle link mechanism connected to the overcurrent tripping part and incorporated in the case, and opening / closing operation of the main circuit contact, an opening and closing lever rocking that pivotally supported in a direction perpendicular to the said set upright frame is slidably supported along the assembly frame of the opening and closing mechanism, the frame by the spring force of the drive spring when tripping along with an alarm output plate that slides operates, together with said set upright frame the closing mechanism within the case is arranged so as to be perpendicular to the longitudinal direction of the case, the exterior comes in the longitudinal direction and parallel outer side surface of the case The device is equipped with an auxiliary switch that detects the ON / OFF state of the main circuit contact using an electrical signal, or an alarm switch that detects tripping operation using an electrical signal. In Unishi was circuit breaker,
When forming the shaft coupling portion for transmitting the mechanical output signal of the opening and closing operation on the shaft ends of the opening lever to an auxiliary switch mounted on the outer side surface of the casing bets to be, above the right and left ends of said alarm output plate circuit breaker, characterized in that the formation of the lever engaging Godan unit for transmitting the mechanical output signal of the tripping by shifting the position and the shaft coupling portion alarm switch mounted on the outer side surface of the case. The circuit breaker according to claim 1, wherein the auxiliary switch and the alarm switch have a unit case and a contact mechanism as a common part, and an operation lever of an auxiliary switch specification that is connected to a shaft coupling portion of the open / close lever on the breaker body side, Alternatively, the circuit breaker has a structure in which an operation lever of an alarm switch specification that is engaged with a lever engagement step portion of the alarm output plate is assembled.

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