CN101083185A

CN101083185A - Circuit breaker

Info

Publication number: CN101083185A
Application number: CNA2007101055001A
Authority: CN
Inventors: 佐藤佑高; 浜田佳伸; 外山健太郎
Original assignee: Fuji Electric FA Components and Systems Co Ltd
Priority date: 2006-06-01
Filing date: 2007-06-01
Publication date: 2007-12-05
Anticipated expiration: 2027-06-01
Also published as: JP4253701B2; FR2901913A1; JP2007323996A; KR20070115706A; KR100880775B1; CN101083185B

Abstract

The present invention provides a circuit interrupter, which is independent with the other components of the noumenon box carrying; the aperture between the activating handle and the window frame of the hatch in the cover is blocked and can prevent the powder dust from entering effectively. The noumenon box carrying composed of box and cover comprises interrupter function component of the activating handle, the activating handle (7) is arranged with a shape which center is standing on top of an edge-shaped base station combined by a knob part and the top of a rotatable handle rod (8), the knob part passes through the handle window frame of a hatch on the noumenon box cover and extrudes outwards, a handle shutter (10) in the shape of a leaf to close an interstice present between a base station (7a) of an activating handle (7) and a window frame (2B-1) of a handle. The shutter is adjusted to be installed on an upper surface of the base. The shutter (10) extends towards front from a front end and towards rear from a rear end of the base facing the window frame in a manner to close interstices present between the base and the frame at respective on and off positions of the handle (7).

Description

Circuit-breaker

Technical field

The present invention relates to distribution is the circuit-breaker of object with circuit-breaker, residual current circuit breaker etc., specifically about preventing the structure of dust from the handle shutter of invading at the handle window frame of its body casing upper shed.

Background technology

At first, be object with above-mentioned residual current circuit breaker, with all formations of circuit-breaker with and the existing structure of operating grip periphery be illustrated respectively among Fig. 9 and Figure 10.In Fig. 9, the 1st, the lower part box of formation body casing (mold pressing resin casing), the 2nd, middle cover (middlecover), the 3rd, top cover is equipped with main circuit conductor 4, comprises the various parts such as current interruption portion 5, switching mechanism 6, operating grip 7, zero phase current transformer 9 of contact mechanism in casing 1.Herein, as shown in figure 10, operating grip 7 is that pinch hand is that the mediad top of circular-arc edge shape (brim) base station 7a is the resin forming product that erects shape from the cross section, and above-mentioned base station 7a is combined with the top of rock type handle rod member 8, make it possible to and to connect the peristome of middle cover 2 and to arrive ON (connection) and OFF (disconnection) position at the handle window frame of top cover 3 openings and to the pinch hand manual operation of the outstanding handle 7 in outside.

In addition, known have a following structure, its type has a little different with described operating grip 7, this structure is provided with the base portion of handling knob from the handle wing spring-mounted shielding parts that extend of direction (moving direction of handle) forwards, backwards, this curtain-shaped cover member is pressed on periphery (surrounding edge) at the handle window frame of the cap opening of body casing, thereby can prevent the intrusion (for example patent documentation 2) of external dust.

Patent documentation 1: Japanese patent laid-open 8-255548 communique (Fig. 1, Fig. 2)

Patent documentation 2: the Japan Patent spy opens clear 62-170123 communique (Fig. 1～Figure 10)

But, in Fig. 9 and circuit-breaker shown in Figure 10, in order to prevent that dust from invading the inside of body casing by the body casing at lid 2 and the handle window frame that covers 3 upper sheds, be of a size of necessary minimum dimension when satisfying handle and carrying out stroke operation (stroke operation) between ON and the OFF and be necessary to suppress window frame, and on the other hand, increase the length of edge shape base station 7a on fore-and-aft direction of operating grip, even if make operating grip 7 be in the state of the arbitrary position that moves to ON and OFF, also can make between the window frame of base station and lid and not produce the slit.

To this, in the inside of the body casing of circuit breaker, as shown in Figure 9, exist ground, unnecessary space to arrange between the functional part hardly and fit together with high density, if increase the base station 7a of operating grip 7, then the position of handle between ON and OFF can be disturbed by other functional parts.The explosion chamber is equipped with particularly as shown in Figure 9, in current interruption portion 5,, relative therewith, be formed with dividing wall in middle cover 2, so that the arcing gas (arc gas) of following current interruption to produce is not ejected into window frame.Therefore, for the pedestal 7a of operating grip 7, in structure design, have so-called limit it must short and small restriction with the part of tie breaker opposite side, so, in fact be difficult to make the gap between itself and the window frame that covers to be stopped up fully.

And, as patent documentation 2 is illustrated, the base portion of handling knob at operating grip is provided with the wing curtain-shaped cover member (having flexual elastomeric material) that extends along fore-and-aft direction, and this curtain-shaped cover member constitutes by the window frame surrounding edge that is pressed in lid, thereby can prevent the intrusion of dust effectively.But, if instrument (screwdriver etc.) etc. is inserted into the cover gab portion of body casing from the outside, then be easy to make curtain-shaped cover member to produce distortion in the inboard, thereby cause and operating grip between produce the slit, in addition, the front end of instrument also might contact with the live part of box house and cause electric shock, so the problem of the fail safe of circuit-breaker can occur guaranteeing.

Summary of the invention

The present invention proposes in view of the above problems, its purpose is to address the above problem, a kind of circuit-breaker is provided, possesses handle shutter unit, can suppress and the body casing of circuit breaker in interference between other functional parts of loading, and guarantee fail safe, stop up operating grip and, thereby prevent to come from the intrusion of outside dust effectively in the gap that covers between the window frame of opening.

To achieve these goals, according to circuit-breaker of the present invention, it is a kind of circuit-breaker that is equipped with the circuit breaker functional part that comprises operating grip in the body casing of being made up of casing and lid, its operating grip has the shape that the upper central of the edge shape base station that pinch hand combines at the top with rock type handle rod member erects, this pinch hand connects at the described handle window frame that covers opening and outstanding to foreign side, wherein

Swim embedding ground mutually with the pinch hand of handle and on base station, be laid with in the form of sheets handle shutter, with obturating element as slit between base station that stops up described operating grip and the handle window frame, and this handle shutter is respectively on the ON and OFF position of operating grip, forwards and from end edge rearward extend from the front-end edge of the base station relative with the handle window frame, thereby (first aspect) stopped up in the slit between handle and the handle window frame, specifically constituted by mode as described below:

(1) end of above-mentioned handle shutter prolongs along its long side direction, and its extension is directed supporting (second aspect) along the covering face of body casing.

(2) in above-mentioned (1), middle cover that the lid of body casing is combined by the front portion cut apart lid and rear portion lid and the top cover that covers above the middle cover are constituted, and the extension of handle shutter be inserted in middle cover one side the recess that forms above of cutting apart lid and and this recess relatively cut apart between the eaves shape shutter pressing tablet that covers formation and be directed support (third aspect) the opposing party.

(3) in the structure of above-mentioned (2), on the extension lateral margin of handle shutter, be formed with joint fastener, and with this joint fastener relatively middle cover be provided with the retainer (fourth aspect) of restriction shutter moving range.

According to above-mentioned formation, in the ON of operating grip and OFF position forwards and the flake handle shutter of rear extension, the intrusion that prevents dust reliably can be stopped up in the slit between the handle window frame of handle and body casing respectively from edge shape base station ora terminalis.And, under this situation, the handle shutter is via at the long rectangular opening of the fore-and-aft direction of its plate face upper shed and free chimeric with the pinch hand of operating grip, thus, the moving range of the handle shutter that moves with the ON of operating grip and OFF operations linkage and at fore-and-aft direction, compare for a short time with the shift motion of operating grip between ON and OFF, therefore, handle shutter and the interference that is installed between other functional parts of circuit breaker inside are avoided dexterously.

And, because an end of handle shutter is prolonged along long side direction, in order to make this extension and other functional parts not produce interference, and with between the shutter pressing tablet of the recess of its intercalation above the front portion lid that becomes the middle cover of cutting apart structure and rear portion lid and be directed support, and the moving range of handle shutter is limited by being arranged on the retainer that covers side.Thus, even instrument etc. is inserted into the window frame of lid from the outside, the handle shutter also can be inserted into device inside to guarantee fail safe by the prevention instrument.

And the unnecessary structure that changes operating grip is installed cheap flake handle shutter as long as append again, just can avoid increasing considerably cost.

Description of drawings

Fig. 1 is the circuit-breaker body casing of expression in the embodiments of the invention and the exploded perspective view of the handle shutter that loads in this casing.

Fig. 2 is an exploded view of representing to observe from the side the body casing of Fig. 1.

Fig. 3 is illustrated in the stereoscopic figure that carries the circuit-breaker that functional part is installed in the body casing of Fig. 1.

Fig. 4 is illustrated in the circuit breaker that the handle shutter is installed shown in Figure 3, with the sectional view at the handle periphery position of the shutter operating position of operating grip when move operation is carried out in ON and OFF position, (a) and (b) be respectively the corresponding schematic diagram of ON and OFF position with handle.

Fig. 5 is the amplification sectional view that is illustrated in the P portion among Fig. 4 (a).

Fig. 6 is the amplification sectional view that is illustrated in the P portion among Fig. 4 (b).

Fig. 7 is the expression handle shutter corresponding with Fig. 4 (b) and the plane graph of peripheral part thereof.

Fig. 8 is the amplification side cross-sectional view of the major part in the presentation graphs 7.

Fig. 9 is the exploded perspective view of the composition structure of the existing circuit-breaker of expression.

Figure 10 is the lid of the body casing in the presentation graphs 9 and the side cross-sectional, view of operating grip

Label declaration

1 casing; 2 middle cover; The anterior lid of 2A; The 2A-1 recess; 2B rear portion lid; 2B-1 handle window frame; 2B-2 shutter pressing tablet (shutter holderplate); 3 top covers; 7 operating grips; 7a edge shape base station; 8 handle rod members; 10 handle shutters; 10a handle trip embedding hole (handleloose-fit hole); 10b joint fastener (engaging tab).

Embodiment

Below, the embodiment that represents according to Fig. 1～Fig. 8 describes embodiments of the present invention.To the symbol identical among Fig. 1～Fig. 8 of embodiment and omit its explanation with Fig. 9 and the corresponding parts mark of Figure 10.

At first, the exploded view of the body casing of the circuit-breaker of the embodiment of the invention is illustrated among Fig. 1 and Fig. 2, and the stereogram of the composition state of circuit-breaker is illustrated among Fig. 3.

The body casing of the embodiment of Fig. 1～shown in Figure 3, its middle cover forms the structure of cutting apart of combination anterior lid 2A and rear portion lid 2B, with respect to the outstanding operating grip 7 of window frame 2B-1, and append the handle shutter 10 that the sheet of swimming embedding (free chimeric) mutually with pinch hand operating grip 7 and laying as described later is installed on the handle base station from opening on the lid 2B of rear portion.

Herein, handle shutter 10 for example is to have flexual plastic sheet, offer in its unilateral central authorities have the amplitude identical with the pinch hand of operating grip 7, the length of fore-and-aft direction is than the handle trip embedding hole 10a of the minister's that handles knob rectangular shape in addition, and prolongs an end (the ON position side of operating grip) of shutter and the outstanding joint fastener 10b that is formed with on the lateral margin of the left and right sides on its top.Then, for this handle shutter 10, pinch hand by above-mentioned embedded hole 10a and operating grip 7 is chimeric mutually, and with above-mentioned extension intercalation to the recess 2A-1 of formed even shape on the lid 2A of the front portion of middle cover and relative with this recess and be between the outstanding shutter pressing tablet 2B-2 of eaves shape and can be directed support slidably from the leading edge of rear portion lid 2B.

Next, free chimeric and be laid with in the circuit-breaker of above-mentioned handle shutter 10 on operating grip 7, the mode of operation that operating grip 7 moves to ON and OFF position is illustrated respectively among Fig. 4 (a) and the figure (b), and Fig. 4 (a) and (b) in P portion amplification sectional view be illustrated respectively among Fig. 5 and Fig. 6.

Promptly, operating grip 7 is moved to ON position (illustrated left to) as Fig. 4 (a) and state shown in Figure 5 in, free chimeric and be laid in the handle shutter 10 of the upper face side of edge shape base station 7a with the pinch hand of operating grip 7, further rearward extend from the ora terminalis of base station 7a on its top (illustrated right side one end), stop up handle base station 7a and the slit g (with reference to Fig. 5) between the handle window frame 2B-1 of the rear portion of middle cover lid 2B upper shed at this position handle shutter 10, stop the intrusion of external dust thus.In addition, the extension that extends from the left end side of handle shutter 10 be accommodated in forwardly cover 2A above the recess 2A-1 that forms and rear portion cover the gap space between the shutter pressing tablet 2B-2 of 2B.

Herein, if make circuit-breaker become the OFF state and the pinch hand of operating grip 7 moved from the ON position shown in Fig. 4 (a) to the OFF position shown in Fig. 4 (b), then at the mobile beginning initial stage, handle shutter 10 still rests on the position of Fig. 4 (a) and has only handle to move, if move the right-hand member collision of the handle trip embedding hole 10a of pinch hand and handle shutter 10 midway at it, then handle shutter 10 also begins to right-hand mobile with the handle interlock.And, terminal location at operating grip 7, as Fig. 4 (b) and shown in Figure 6, its end of the extension of handle shutter 10 remains in the slit between above-mentioned recess 2A-1 and the shutter pressing tablet 2B-2, and the inboard of the handle window frame 2B-1 that is drawn out in the middle cover upper shed, and the slit g (with reference to Fig. 6) between handle base station 7a and the window frame is stopped up in this position.

Judge from above-mentioned explanation, position at the ON and the OFF of operating grip 7, the window frame 2B-1 of middle cover and with the ora terminalis of its relative operating grip 7 in the inside between the slit, further stopped up by end edge, thereby can prevent from reliably to invade device inside from the dust of outside to the handle shutter 10 that rear side is extended from handle base station 7a.And, shorter with the moving range of the free chimeric handle shutter 10 of the pinch hand of operating grip 7 than the shift motion of operating grip 7, when the OFF state shown in Fig. 4 (b), because the front end of handle shutter 10 (illustrated right side) is forwards not outstanding from the edge of handle base station 7a, so can not produce bad interference to other functional parts that the body box house is loaded.

And, shown in Fig. 4 (b), when operating grip 7 moves to the state of OFF position, shown in the amplification sectional view of the plane graph of Fig. 7 and Fig. 8, the prolongation side end of handle shutter 10 is positioned at the recess 2A-1 of anterior lid 2A and the space of covering clamping between eaves shape (eaves) the shutter pressing tablet 2B-2 that forms on the 2B at the rear portion.And, relative with the joint fastener 10b that forms on the top of extension and give prominence to from rear portion lid 2B and to be formed with retainer 2B-3.

Thus, operating grip 7 is on the OFF position time, promptly use screwdriver instruments such as (driver) to handle window frame 2B-1, to insert from the outside of body casing, owing to can not be inserted into the inside of casing by 10 preventions of handle shutter, in addition, even instrument is pushed into reluctantly, because the joint fastener 10b of handle shutter 10 is prevented by the retainer 2B-3 of middle cover, be not pulled out so worry shutter, can guarantee fail safe thus.And in Fig. 8, the end side order difference part 2A-2 that forwardly covers the recess 2A-1 that forms above of 2A has the effect of retainer, when being used to limit operating grip 7 and moving to the ON position and the moving range of the handle shutter 10 of handle interlock.

Claims

1. circuit-breaker is characterized in that:

It is a kind of circuit-breaker that is equipped with the circuit breaker functional part that comprises operating grip in the body casing of being made up of casing and lid, its operating grip has the shape that the upper central of the edge shape base station that pinch hand combines at the top with rock type handle rod member erects, this pinch hand connects at the described handle window frame that covers opening and outstanding to foreign side, wherein

Swim embedding ground mutually with the pinch hand of handle and on base station, be laid with in the form of sheets handle shutter, with obturating element as slit between base station that stops up described operating grip and the handle window frame, and this handle shutter is on the ON and OFF position of operating grip, front-end edge from the base station relative with the handle window frame forwards and from end edge rearward extends respectively, thereby the slit between handle and the handle window frame is stopped up.

2. circuit-breaker according to claim 1 is characterized in that:

One end of handle shutter prolongs along its long side direction, and its extension is directed along the covering face of body casing supporting.

3. circuit-breaker as claimed in claim 2 is characterized in that:

Middle cover that the lid of body casing is combined by the front portion cut apart lid and rear portion lid and the top cover that covers above the middle cover are constituted, and the extension of handle shutter be inserted in middle cover one side the recess that forms above of cutting apart lid and and this recess relatively cut apart between the eaves shape shutter pressing tablet that covers formation and be directed support the opposing party.

4. circuit-breaker as claimed in claim 3 is characterized in that:

On the extension lateral margin of handle shutter, be formed with joint fastener, and with this joint fastener relatively middle cover be provided with the retainer of restriction shutter moving range.