JPH082913Y2 - Circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a circuit or a breaker equipped with an accessory device, and more particularly to a structure for installing the accessory device inside a breaker or breaker case.

[Prior Art] FIGS. 4 and 5 are views showing a conventional circuit breaker and circuit breaker disclosed in, for example, Japanese Utility Model Laid-Open No. 56-166645, and FIG. 4 is a vertical sectional side view showing an ON state. 5 is a vertical sectional side view showing an off state. In the figure, (1) is a case consisting of a base (1a) and a cover (1b) and a breaker case, and (2) is a stator having a fixed contact (3) fixed to the base (1a). (4) A movable contact device as a switching element having a breaking and breaking performance, wherein the movable contact (5) is a fixed contact (3).
Has a movable contact (5a) facing the. (6) is a movable arm, which is fixed to the insulating shaft (7) and can be opened and closed at the same time for each pole. Reference numeral (8) is an arc extinguishing chamber, and reference numeral (9) is a toggle link mechanism as an opening / closing mechanism for opening / closing the movable contactor device (4), which is composed of an upper link (10) and a lower link (11). One end of the upper link (10) is a cradle (12) rotatable about the cradle shaft (23), and the other end is one end of the lower link (11). The upper link shaft (13) and the lower link (14), respectively. ) Are connected by. (15) is an upright operation handle, and (16) is an actuating spring, which is stretched between the lower link shaft (14) of the toggle link mechanism (9) and the operation handle (15). (17) and (18) are a thermal trip element and an electromagnetic trip element as a part of an opening / closing mechanism for operating the toggle link mechanism (9), which are activated by a bimetal (19) and a movable iron piece (20) respectively. The trip bar (21) is rotated counterclockwise.
(22) is a latch having one end engaged with the trip bar (21) and the other end engaged with the cradle (12).

The operation of the circuit and the breaker configured as described above will be described. As shown in Fig. 4, the cradle (12) has a latch (2
When the operating handle (15) is tilted in the direction shown by the arrow (A) from the state of being engaged with 2), the toggle link mechanism (9) is extended by the operating spring (16) and the movable contact (5a) is fixed ( Join to 3). Then, when the operating handle (15) is tilted to the off position in FIG. 5, the toggle link mechanism (9) bends to separate the movable contact (5a) from the fixed contact (3). When an overcurrent flows in the circuit in the ON state shown in Fig. 4, the thermal trip element (17) or the electromagnetic trip element (18) is activated to activate the cradle (12) and the latch (2).
The engagement of 2) is released, the toggle link mechanism (9) bends, and the insulating shaft (7) automatically interlocks with each pole and automatically disconnects.

FIG. 5 shows the mounting plate (24) to which the micro switch (26) is mounted, fixed to the base (1a) with the mounting screw (25).

The internal accessory device of FIG. 5 is an auxiliary switch, and the movable arm (6) pushes the lever (26a) of the micro switch (26) in the off position to operate the micro switch (26). In the ON position, the movable arm (6) has the micro switch (2
Move away from the lever (26a) of 6), and press the micro switch (26).
The contact of switches.

[Problems to be solved by the invention]

In the conventional circuit breaker and circuit breaker as described above, the accessory device (micro switch 26) is attached to the base (1
Since it is fixed to a), a mounting screw (25) is required,
Since the screw tightening work is required, it is troublesome and costly to attach the accessory device.

The present invention has been made to solve such a problem, and it is possible to obtain a circuit and a breaker that can easily and inexpensively attach an accessory device because a mounting screw is unnecessary and a screw tightening work is unnecessary. With the goal.

[Means for solving problems]

A circuit breaker and a circuit breaker according to the present invention include a groove provided in a mechanism frame and a protrusion provided in an accessory device, and the protrusion is fitted in the groove to fit the accessory device in the mechanism frame. After that, the accessory device is fixed by pressing it with a cover.

[Action]

In this invention, since the protrusion is fitted into the groove and the accessory is fitted into the mechanism frame, the accessory is pressed and fixed by the cover, so that the attaching screw and the screw tightening work for attaching the accessory are unnecessary. Become.

[Example of device]

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a vertical sectional side view showing an ON state, and FIG.
The figure is a plan view excluding the lower half cover, and FIG. 3 is an exploded perspective view of the mechanism frame and the accessory device. The same or corresponding parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. In the figure, (27) is a mover having a movable contact (27a) that comes in contact with and separates from the fixed contact (3), and (28) is a mover (27).
It is a push plate that opens and closes and slides along the groove of the base (1a). (29) is a separation spring, and (30) is a U-shaped mechanism frame, which is installed on the base (1a) and supports a contact opening / closing mechanism and the like. Reference numeral (31) is a U-shaped link that is removably engaged with the push plate (28) by a pin (32) and slides along the long hole (30a) of the mechanism frame (30). (33) is an operation handle, which is pivotally attached to the mechanism frame (30) by a pin (34) and whose end is connected to the link (31) through the pin (35). Reference numeral (36) is a tension spring, which holds the restoring force of the operation handle (33) and the link (31) at the time of automatic release and the trip position of the operation handle (33). (37) is a lever,
The pin (34) is pivotally attached to the mechanism frame (30) at the same time as the operation handle (33), and the component of the force generated at the engaging portion between the push plate (28) and the link (31) is automatically tripped (described later). Do)
And the engagement between the push plate (28) and the link (31) is maintained. Reference numeral (38) is an automatic tripping device, which disengages the lever (37) when an overcurrent or a short circuit current occurs and performs an automatic tripping operation. (39) is a flexible copper stranded wire that connects one end of the automatic trip device (38) and the mover (27), and (40) is an automatic trip device (38).
Is a terminal plate connected to the other lead-out portion of the and has a terminal screw (41). (42) is a groove provided in the mechanism frame (30),
(43) An internal accessory that is housed in the chopstick or disconnector case (1), and (44) is a protrusion provided on the internal accessory (43). The internal accessory device (43) is an auxiliary switch that performs the same movement as the main opening / closing contact of a circuit or circuit breaker to light an external lamp to indicate ON / OFF, a circuit switch or circuit breaker. Alarm switch that activates an alarm lamp, buzzer, etc., a voltage trip device that externally applies a voltage and trips the circuit breaker, and a circuit trip or circuit breaker when the voltage of the main circuit falls below a specified value. There is an undervoltage tripping device or the like for tripping, and these are housed in the breaker case (1) individually or in combination.

The off operation, the on operation, and the trip operation of the circuit and the circuit breaker in this configuration are needless to say, not shown or described.
For example, since it is disclosed in Japanese Utility Model Laid-Open No. 55-63052, its description is omitted.

As shown in FIG. 3, the groove (42) is formed in the mechanism frame (30).
And the protrusion (44) is provided on the internal accessory (43), and the protrusion (44) is fitted into the groove (42) to allow the internal accessory (4
After fitting 3) to the mechanical frame (30), cover (1b)
When is fixed to the base (1a), the internal accessory device (43) is pressed by the cover (1b) and fixed in the breaker case (1) as shown in FIG. In this state, the tip of the protrusion (44) engages with the mechanism frame (30) as shown in FIG. 2, so that the protrusion (44) does not fall out of the groove (42).

[Effect of device]

As described above, according to the present invention, the attachment screw for the accessory device is unnecessary and the screw tightening work is not required, so that the accessory device can be easily and inexpensively attached.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of the present invention, FIG. 2 is a plan view excluding a lower half cover, FIG. 3 is an exploded perspective view of a mechanism frame and an auxiliary device, and FIG. FIG. 5 is a vertical sectional side view showing an ON state, and FIG. 5 is a vertical sectional side view showing an OFF state. In the figure, (1) ladder and breaker case, (1a) base, (1b) cover, (30) mechanical frame, (42) groove, (43) accessory, (44) protrusion. Is. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A case and a breaker case, each of which includes a base and a cover, a mechanism frame which is installed inside the case and breaker case and supports a contact opening / closing mechanism, and an attached device attached to the base and the like. In a circuit breaker or a circuit breaker that has a groove provided in the mechanism frame and a protrusion provided in the accessory device, after fitting the protrusion into the groove and fitting the accessory device into the mechanism frame A circuit or disconnection device characterized in that the auxiliary device is fixed by pressing the cover.