CN1240092C

CN1240092C - Circuit breaker

Info

Publication number: CN1240092C
Application number: CNB021220026A
Authority: CN
Inventors: 青木忠久; 佐藤一彦; 藤塚隆志
Original assignee: Fuji Electric Co Ltd
Current assignee: Fuji Electric FA Components and Systems Co Ltd; Fuji Electric Assets Management Co Ltd
Priority date: 2001-05-28
Filing date: 2002-05-28
Publication date: 2006-02-01
Anticipated expiration: 2022-05-28
Also published as: TW546673B; JP4288867B2; JP2002352688A; KR20020090885A; KR100693705B1; CN1388543A

Abstract

The present invention is to improve a mounting structure of an auxiliary cover so as to keep the cover at an opened position even when the cover is opened from the closed position and the operator's hand is removed, by considering workability when a user mounts an auxiliary device. A circuit breaker is provided, it is composed by forming a recessed part 3a for laterally storing an auxiliary switch as the auxiliary device and the like side by side, in a cover (3) of a breaker case with a switch mechanism incorporated and by mounting the auxiliary cover (10) formed as a single swing opening/closing lid to it. Engaging step parts (10d) are formed at the rear edge of the auxiliary cover as lock holding means for temporarily stopping the auxiliary cover in an erected attitude at the opened position when the auxiliary cover is opened from the closed position, and engaging projections (3d) are formed on the cover side of the breaker case by facing them to the engaging step parts, so that the auxiliary cover is temporarily held in the erected attitude by pressing the engaging step parts against the engaging projections at the opened position of the auxiliary cover.

Description

Circuit breaker

Technical field

The present invention relates generally to circuit breaker, and for example automatic circuit breaker or earth leakage circuit breaker more particularly, relate to the mounting structure of accessory cover, and this accessory cover is installed in the concave surface of the attached switch housing that the casing cover that is used for breaker body forms.

Background technology

At first, see also Figure 4 and 5, will provide the narration of the structure of the circuit breaker that is applied to embodiments of the invention, the present invention is based on the example of above-mentioned automatic circuit breaker.In these accompanying drawings, label 1 expression one case for circuit breaker, this shell is made of resin and is made up of a housing 2 and a lid 3; 4, with the fixed contact of power end terminal formation one; 5, one contacts movably; 6, one open and closing organ; 7, one operating grips; 8, one over current trips and 9, the load side terminal.Shape pouch concave surface 3a is so that the attached switch as contents (choosing wantonly) that along continuous straight runs will be narrated after holding, and is installed on the concave surface 3a as the accessory cover 10 that opens and closes lid one.

The lid 3 of case for circuit breaker 1 is designed to pull out operating grip 7 end face of the recess that can form from the center of lid 3.Near the formation concave surface 3a of the central recess in the zone at the place, side of power supply terminal.Accessory cover 10 is that the single pendulum ejector half opens and closes lid, and its structure can be combined into its right-hand member and left end one bearing portions of lid 3 by hinge.The lid of accessory cover 10 partly is designed to have L shaped cross section shown in the drawings, and is anchored on off-position by the screw on the lid 3, and the end surfaces of its upstanding side is in the wall of recess.

In Fig. 5, label 11 expressions one auxiliary switch (showing the signal of telecommunication indication of the ON/OFF of the main circuit contact point that is connected with the movable contact 5 of circuit breaker) as attached switch; 12, one alarm switches (when circuit breaker trip to extraneous display operation signal); And 13, the lead that links to each other with external signal line from switch 11,12.For attached switch is installed in the breaker body, accessory cover 10 is opened in the position shown in the chain-dotted line in Fig. 4, and auxiliary switch 11 and alarm switch 12 are arranged on right side shown in Figure 5 and left side, and the concave surface 3a that forms of the lid 3 that is used for case for circuit breaker 1 of packing into.From the side of case for circuit breaker 1, pull out lead 13 from attached switch, and be directly connected in external signal line, attached terminal block perhaps is installed on the side of case for circuit breaker 1 with that link to each other, the special attached terminal block (not shown) of lead 13, so that can link to each other with external signal line with one.

As mentioned above, the invention provides a kind of circuit breaker, this circuit breaker comprises: concave surface, this concave surface are formed in the lid 3 that comprises the case for circuit breaker that opens and closes mechanism, and can along continuous straight runs hold the annex such as auxiliary switch; And accessory cover, described accessory cover can be used as the single pendulum ejector half that is installed on the concave surface and opens and closes lid.In circuit breaker, when accessory cover when off-position is opened, the trailing edge place of accessory cover forms the engaging groove part as interim locking device, in order to accessory cover erectly being locked in open position temporarily, and forms engagement projections in the lid of the case for circuit breaker relative with the engaging groove part.The accessory cover that use is shown in an open position partly is adjacent to engagement projections with engaging groove, so that erectly lock accessory cover temporarily.

Therefore, in circuit breaker is installed in state on distribution panelboard or the similar device, when the user installs in addition annex such as auxiliary switch and alarm switch, accessory cover can be opened to open position and be locked in open position temporarily from off-position, and attached switch can with the hands freely be installed.But this will improve workability.

Summary of the invention

For above-mentioned circuit breaker is installed on distribution panelboard, control board or the similar device, in the state of power end terminal points upwards, load side terminal directed downwards, case for circuit breaker 1 is installed on the supporting rail that forms onboard, so that previous action handle that can slave plate.

Under the user additionally will be installed in situation on the circuit breaker such as the annex auxiliary switch 11 and the alarm switch 12, this circuit breaker is in circuit breaker is installed on the distribution panelboard, unclamps one group of screw of accessory cover 10 and with hand accessory cover 10 is set in open position, and the state that attached switch is inserted the concave surface 3a of lid 3 from the front.

Say that by the way if relinquishment opens and closes accessory cover 10 by the single pendulum ejector half that hinge combines with the lid 3 of case for circuit breaker 1, it can be owing to the reason of deadweight is returned off-position.For this reason, owing to the operator must use another hand supporting accessory cover 10 so the attachment in the circuit breaker at very difficult attached or separation scene in a hand installation auxiliary switch and similar device.

Therefore, the purpose of this invention is to provide a kind of improvement of circuit breaker, when opening this circuit breaker from off-position, even loose one's grip with its relieving, also can make it remain in open position, in circuit breaker is installed in state on distribution panelboard or the similar device, make the user installation attachment more easy by this.

In order to obtain above-mentioned purpose, the invention provides a kind of circuit breaker, this circuit breaker comprises: one has the concave surface of accessory cover, and this concave surface constitutes the Shell of circuit breaker that comprises a housing and a lid; Attached switch as annex, described annex along continuous straight runs is contained in the lid, it is characterized in that, accessory cover is that a single pendulum ejector half opens and closes lid, and have from an arm of its right-hand member and left end projection, described end is incorporated into lid by hinge, and accessory cover comprises a holding device, when accessory cover when off-position is opened, holding device is used for accessory cover is locked in upright position temporarily.In a preferred versions of the present invention, the trailing edge place of accessory cover forms the engaging groove part, this engaging groove partly can be used as the interim holding device that is used for accessory cover, form engagement projections in the lid of the case for circuit breaker relative with the engaging groove part, with the accessory cover that is in open position engaging groove partly is adjacent to engagement projections, so that accessory cover is locked in the stand up position provisionally.

Use this kind setting, in circuit breaker vertically is installed in state on the distribution panelboard, attached or when separating annex such as auxiliary switch and alarm switch as the user, if open the accessory cover that keeps with hand from the front of circuit breaker to open position (level) from off-position, the engaging groove part of accessory cover will be hooked on the engagement projections that forms on the lid of case for circuit breaker, and be locked in the there temporarily.Therefore, can make attached switch and the accessory cover that keep to discharge is attached or separate with hand.

Description of drawings

Fig. 1 (a) and 1 (b) are the schematic diagrames of structure of the case for circuit breaker of embodiments of the invention, and wherein Fig. 1 (a) is the front view of the case for circuit breaker lid that separates with accessory cover, and Fig. 1 (b) is the cutaway view along the arrow X-X intercepting of Fig. 1 (a);

Fig. 2 (a) and 2 (b) are the partial enlarged drawings of the main body among Fig. 1 (b), and wherein Fig. 2 (a) shows the engagement projections that forms in the lid, and Fig. 2 (b) shows the shape of the engaging groove part that forms in the accessory cover;

Fig. 3 (a) and 3 (b) are the diagrammatic sketch corresponding with Fig. 2, and they are quite useful when the operation of the accessory cover of explaining interim locking, and wherein Fig. 3 (a) and 3 (b) show the accessory cover that is in closed condition and open mode respectively;

Fig. 4 is the cutaway view of the structure of the circuit breaker that attached switch is housed of the present invention;

Fig. 5 is the circuit breaker among Fig. 4 and the partial plan layout of attached switch.

1 case for circuit breaker

2 housings

3 lids

The 3a concave surface

The 3b articulated section

The 3d engagement projections

10 accessory covers

The 10a arm

10d engaging groove part

Embodiment

To at length narrate the present invention in conjunction with Fig. 1 to 3 that its preferred embodiment is shown now.Please note with identical label and represent and Figure 4 and 5 corresponding components and element, will omit its narration here.

In the embodiment shown in Fig. 1 to 3, the lid 3 of case for circuit breaker lid 3 and accessory cover 10 is attached to concave surface 3a, this concave surface is formed in the lid 3, and can hold attached switch, the structure of lid 3 is identical with the prior art shown in the Figure 4 and 5 basically, but difference from prior art is to form the shape part as locking device as described below in lid 3 and the accessory cover 10 in addition, and described locking device can be used for the accessory cover 3 that interim locking stands on open position.In Fig. 1 (a) and 1 (b), label 3b represents to be used for the hinge portion (dead eye) of axially mounting accessory cover 10; 3c is used for accessory cover 3 is anchored on the screw hole of off-position; And 3e, be used for the fenestra (referring to Fig. 4) of draw-out handle 7.Label 10a represents from the right-hand member of accessory cover and the left end skew arm to rearward projection; 10b, the main shaft that forms on the inboard of the arm 10a of the articulated section 3b of the lid 3 of will packing into (circular projection); And 10c, a trip bolt hole that forms in the accessory cover 3 corresponding with above-mentioned screw hole 3c.

As holding device, form the engagement projections 3d shown in the enlarged drawing of Fig. 2 (a) on the end face at the top of next door part, the phase place next door of the case for circuit breaker that forms in this next door part and the lid 3 is corresponding, the trailing edge place of the cover plate of accessory cover 10 forms the engaging groove part (recess) shown in the enlarged drawing of Fig. 2 (b), this accessory cover is relative with engagement projections 3d, intersects so that follow as the movement locus of the engaging groove part 10d of the opening and closing campaign of the accessory cover on the articulated section of fulcrum 10 and the engagement projections 3d of lid 3.

Use this setting, among Fig. 1 (b) of state on being in the lid 3 that accessory cover 3 is installed in case for circuit breaker, if accessory cover is opened to open position (chain-dotted line) from off-position (solid line), then the trailing edge of accessory cover 10 will be met the engagement projections 3d that is used to brake, and engaging groove part (recess) 10d will assemble and stop among the engagement projections 3d, so that accessory cover 10 locks and remain in open position.That is to say that even relinquishment is in the accessory cover 10 of this state, accessory cover 10 also will be as being kept upright shown in the chain-dotted line among Fig. 1 (b).

Therefore, as in conjunction with shown in Figure 5, in circuit breaker is installed in state on distribution panelboard or the similar device, for being installed on the circuit breaker such as the attached switch auxiliary switch 11 and the alarm switch 12, can after being locked to open position, accessory cover 10 with the hands freely attached switch be installed among the concave surface 3a of lid 3.But this will improve workability.In addition, if the accessory cover 10 usefulness finger tips that are locked in open position are pressurizeed to off-position temporarily, engagement projections 3d and engaging groove part 10d discharge mutually, so that accessory cover 10 is owing to the reason of deadweight is returned off-position.

By the way, as top described in conjunction with Fig. 5, for the attached terminal block that will link to each other with the lead 13 from attached switch is installed on the side of case for circuit breaker 1, forward and backward position on the wall of the lid 3 shown in Fig. 1 (a) forms dovetail groove 3f, and with the engagement projections (swallow-tail form) of the attached terminal block dovetail groove 3f that packs into.This can make attached terminal block be installed on the side of case for circuit breaker 1, even and under the state that above-mentioned accessory cover 10 is opened, can not blocked by accessory cover yet.

Claims

1. circuit breaker, described circuit breaker comprises: one has the concave surface of accessory cover, and described concave surface constitutes the Shell of circuit breaker that comprises a housing and a lid; Attached switch as annex, described annex along continuous straight runs is contained in the lid, it is characterized in that, described accessory cover is that a single pendulum ejector half opens and closes lid, and have from an arm of its right-hand member and left end projection, described end is incorporated into described lid by hinge, and described accessory cover comprises a holding device, when described accessory cover when off-position is opened, described holding device is used for described accessory cover is locked in upright position temporarily.

2. circuit breaker as claimed in claim 1, it is characterized in that, the trailing edge place of described accessory cover forms the engaging groove part, described engaging groove partly can be used as the interim holding device that is used for described accessory cover, form engagement projections in the lid of the case for circuit breaker relative with described engaging groove part, with the accessory cover that is in open position described engaging groove partly is adjacent to described engagement projections, so that described accessory cover is locked in the stand up position provisionally.