CN101923996A - Circuit-breaker - Google Patents

Abstract

The present invention proposes a kind of circuit-breaker, and it can realize miniaturization, and reduces component costs when guaranteeing the phase insulation performance.Handle arm is made of metallic plate, have the center of rotation portion integrally formed with the handle arm body portion in its end, support frame is made of metallic plate, has rotational support portion integrally formed with the framework body portion and that contact with the center of rotation portion of handle arm in its end.On in handle arm body portion and framework body portion any one, the thin-walled of integrally formed and center of rotation portion or rotational support portion adjacency, this thin-walled forms, its inner surface the plane of the outer surface that comprises handle arm body portion or framework body portion and comprise the handle arm body portion or the plane of the inner surface of framework body portion between, prevent of the extending direction skew of the center of rotation portion of handle arm along cross bar.

Description

Circuit-breaker

Technical field

The present invention relates to circuit-breakers such as the Inturruptor for sub-line that uses in a kind of distribution board in electric power system etc. or residual current circuit breaker.

Background technology

In common circuit-breaker, close in advance under the situation of mechanism in the contact of adopting the use toggle link, last connecting rod is driven indirectly via main spring.At this moment, it is bigger that the actuating length that will drive the handle arm of main spring in order to ensure the surplus of operation is set ground, but for the operation sense that makes the operating grip that moves integratedly with handle arm is stable, it be less the rotational angle of operating grip need being suppressed.Therefore, the center of rotation of handle arm is configured in as far as possible on the alternate position near the insulation crust bottom surface.This handle arm is supported rotationally by the alternate locational support frame that is fixed near the insulation crust bottom.For this handle arm, need prevent its extending direction lateral shift along cross bar.

A kind of circuit-breaker is disclosed in patent documentation 1, its bottom in handle arm forms circular-arc protuberance, upper surface at support frame forms the concave arc portion corresponding with this circular-arc protuberance, by in the concave arc portion of this support frame, embedding the circular-arc protuberance of handle arm, handle arm is supported rotationally by support frame, in this circuit-breaker, make the part bending laterally of handle arm and support frame and form bend, these bends are all engaged with the lateral surface of the other side's side, thus the lateral shift of preventing.Above-mentioned bend exceeds the required width of handle arm or support frame, protrudes significantly laterally.

Patent documentation 1: Japan opens flat 2-104549 specification, particularly Fig. 1～Fig. 3 and explanation thereof in fact

Summary of the invention

Shown in patent documentation 1, exceed the required width of handle arm or support frame and under the situation about protruding significantly laterally at bend, the phase interbody spacer of configuration handle arm and support frame is increased, its result, owing to the width dimensions of circuit-breaker is increased, so hinder the miniaturization of circuit-breaker.

In addition, configuration is used to keep the cross bar of movable contact below handle arm, but when guaranteeing the phase insulation of this movable contact, the bend that protrudes significantly to the outside of handle arm and support frame reduces insulating properties, hinders the raising of opening performance.

In addition, known to prevent the lateral shift of handle arm, also exist to substitute the bend of patent documentation 1 and use the technology of miscellaneous part, but under the situation of using this miscellaneous part, also exist component costs and assembly cost to rise and cause the problem of high price.

The present invention proposes the circuit-breaker after a kind of improvement that can improve above-mentioned problem.

Circuit-breaker involved in the present invention has: fixed contact, and it is configured on the insulation base station; Movable contact, it has the moving contact that contacts/separate with described fixed contact; Cross bar, it rotatably is configured on the described insulation base station, keeps described movable contact; Handle arm, it is installed on the manually operated handle; Support frame, it is fixed on the described insulation base station, and the rotatable earth's axis supports described handle arm; Dwang, it engages with the chain shot of tripgear, rotates when tripping operation; Lower link, it drives described cross bar; Last connecting rod, its axle is supported on the described dwang, combines with described lower link and constitutes toggle link via spring catch; And main spring, its driving side and described handle arm link, and slave end combines with described spring catch,

This circuit-breaker is characterised in that, described handle arm is made of metallic plate, have the center of rotation portion integrally formed with the handle arm body portion in its end, in addition, described support frame is made of metallic plate, has rotational support portion integrally formed with the framework body portion and that contact with the center of rotation portion of described handle arm in its end, on in described handle arm body portion and described framework body portion any one, the thin-walled of integrally formed and described center of rotation portion or described rotational support portion adjacency, this thin-walled forms, its inner surface or outer surface are on the plane of the outer surface that comprises described handle arm body portion or described framework body portion and comprise between the plane of inner surface of described handle arm body portion or described framework body portion, prevent the extending direction skew of the center of rotation portion of described handle arm along described cross bar.

The effect of invention

In circuit-breaker involved in the present invention, because handle arm is made of metallic plate, have the center of rotation portion integrally formed with the handle arm body portion in its end, in addition, support frame is made of metallic plate, have with the framework body portion integrally formed in its end, and the rotational support portion that contacts with the center of rotation portion of handle arm, on in handle arm body portion and framework body portion any one, the thin-walled of integrally formed and center of rotation portion or rotational support portion adjacency, this thin-walled forms, its inner surface or outer surface the plane of the outer surface that comprises handle arm body portion or framework body portion and comprise the handle arm body portion or the plane of the inner surface of framework body portion between, prevent of the extending direction skew of the center of rotation portion of handle arm along cross bar, so can make the circuit-breaker miniaturization, and when guaranteeing the phase insulation performance, reduce component costs.

Description of drawings

Fig. 1 is the oblique view of execution mode 1 under tripped condition of expression circuit-breaker involved in the present invention.

Fig. 2 is the related side profile of circuit-breaker under tripped condition of expression execution mode 1.

Fig. 3 be extract handle arm among Fig. 2, go up connecting rod, lower link, support frame and the end view represented.

Fig. 4 is the related side profile of circuit-breaker under off-state of expression execution mode 1.

Fig. 5 be extract handle arm among Fig. 4, go up connecting rod, lower link, support frame and the end view represented.

Fig. 6 is the related side profile of circuit-breaker under on-state of expression execution mode 1.

Fig. 7 be extract handle arm among Fig. 6, go up connecting rod, lower link, support frame and the end view represented.

Fig. 8 is with the handle arm in the execution mode 1 and support frame dissects out and the front view represented with associated member.

Fig. 9 be expression in the execution mode 1 handle arm and the exploded view of support frame.

Figure 10 is with the handle arm in the execution mode 2 of circuit-breaker involved in the present invention and support frame dissects out and the front view represented with associated member.

Figure 11 be expression in the execution mode 2 handle arm and the exploded view of support frame.

Figure 12 is the handle arm in the execution mode 3 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 13 is the handle arm in the execution mode 4 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 14 is the handle arm in the execution mode 5 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 15 is the handle arm in the execution mode 6 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 16 is the handle arm in the execution mode 7 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 17 is the handle arm in the execution mode 8 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 18 is the handle arm in the execution mode 9 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 19 is the handle arm in the execution mode 10 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Figure 20 is the handle arm in the execution mode 11 of expression circuit-breaker involved in the present invention and the exploded view of support frame.

Embodiment

Below, with reference to accompanying drawing, some execution modes of circuit-breaker involved in the present invention are described.

Execution mode 1

Fig. 1 is the oblique view of execution mode 1 under tripped condition of expression circuit-breaker involved in the present invention, Fig. 2 is the related side profile of circuit-breaker under tripped condition of expression execution mode 1, Fig. 3 is the handle arm that extracts among Fig. 2, last connecting rod, lower link, support frame and the end view represented, Fig. 4 is the related side profile of circuit-breaker under off-state of expression execution mode 1, Fig. 5 is the handle arm that extracts among Fig. 4, last connecting rod, lower link, support frame and the end view represented, Fig. 6 is the related side profile of circuit-breaker under on-state of expression execution mode 1, Fig. 7 is the handle arm that extracts among Fig. 6, last connecting rod, lower link, support frame and the end view represented, Fig. 8 is with the handle arm in the execution mode 1 and support frame dissects out and the front view represented with associated member, and Fig. 9 is the handle arm in the expression execution mode 1 and the exploded view of support frame.

Execution mode 1 related circuit-breaker is the three-phase circuit circuit breaker, uses insulation crust 10 as shown in Figure 1 and constitutes.Insulation crust 10 has insulation base station 11 and insulating cover 12.On insulation base station 11, dispose circuit breaker unit 20A, 20B, the 20C of each phase in the three-phase each other side by side, in the top configuration operation mechanism 40 of the circuit breaker unit of central authorities 20B.Insulation base station 11 has: a pair of outer wall 11A, 11B and a pair of partition wall 11C, 11D.Configuration circuit breaking units 20A between outer wall 11A and partition wall 11C, configuration circuit breaking units 20B between partition wall 11C, 11D, configuration circuit breaking units 20C between partition wall 11D and outer wall 11B.Insulating cover 12 covers circuit breaker unit 20A, 20B, 20C and the operating mechanism 40 of each phase on the insulation base station 11, and the operating grip 41 of operating mechanism 40 protrudes from insulating cover 12.In addition, in Fig. 1, the covering circuit breaker unit 20A of insulating cover 12, the part of 20B are cut, and their inside is illustrated.

The circuit breaker unit 20A of each phase, 20B, 20C constitute mutually the samely, and its concrete structure is shown in Fig. 2, Fig. 4, Fig. 6.Fig. 2, Fig. 4, Fig. 6 illustrate the circuit breaker unit 20B of central authorities, but other circuit breaker unit 20A, 20C also constitute in the same manner.In the circuit breaker unit of each phase 20A, 20B, 20C, commonly dispose cross bar 30.This cross bar 30 is configured on the insulation base station 11, shown in Fig. 2, Fig. 4, Fig. 6 in the mode with each mutually circuit breaker unit 20A, 20B, 20C quadrature.

The circuit breaker unit 20A of each phase, 20B, 20C have fixed contact 21, moving contact 22, movable contact 23 and pair of terminal 24,25.Fixed contact 21 is configured on the insulation base station 11, is connected with terminal 24.Moving contact 22 relatively is configured on the movable contact 23 with fixed contact 21, by the rotation of this movable contact 23, contacts/separates with fixed contact 21.This movable contact 23 is connected with terminal 25.If moving contact 22 contacts with fixed contact 21, then the circuit between the terminal 24,25 is connected, and in addition, if moving contact 22 separates with fixed contact 21, then the circuit between the terminal 24,25 disconnects.

Cross bar 30 illustrates in Fig. 2, Fig. 4, Fig. 6.This cross bar 30 is configured in the bottom of insulation base station 11, prolongs in the mode with the paper quadrature of Fig. 2, Fig. 4, Fig. 6.This cross bar 30 is that rotate at the center by operating mechanism 40 with its axle center.The circuit breaker unit 20A of each phase, the movable contact 23 among 20B, the 20C are installed on cross bar 30.Is center when rotating at cross bar 30 with its axle center, and the circuit breaker unit 20A of each phase, the movable contact 23 of 20B, 20C rotate simultaneously, by the rotation of this movable contact 23, make moving contact 22 contact/separate with fixed contact 21.

Operating mechanism 40 has operating grip 41, handle arm 42, support frame 43, dwang 44, goes up connecting rod 45, lower link 46, spring catch 47 and main spring 48.Operating grip 41 is by manually operating.Handle arm 42 is installed on the operating grip 41.Support frame 43 is fixed on partition wall 11C, the 11D of insulation base station 11.Handle arm 42 supported frameworks 43 support rotationally.The fulcrum P of this handle arm 42 illustrates in Fig. 2～Fig. 7.Operating grip 41 protrudes to its top from insulating cover 12, is that rotate at the center by manual operation with fulcrum P.By the rotation of this operating grip 41, handle arm 42 is that rotate at the center with operating grip 41 with fulcrum P also.Handle arm 42 is positioned at the centre position under tripped condition shown in Figure 2, be positioned at the position that is tilted to the left under off-state shown in Figure 4, in addition, is positioned at the position that is tilted to the right under on-state shown in Figure 6.

Dwang 44 and chain shot 34 co-operatings that drive by over current trip 33.Dwang 44 is continued to the clockwise direction pretension by main spring 48, but does not detect at over current trip 33 under the state of overcurrent, and dwang 44 engages with chain shot 34 and is held.Make chain shot 34 tripping operations if over current trip 33 detects overcurrent, then dwang 44 separates with chain shot 34, and rotates along clockwise direction.

For last connecting rod 45, its upper end is supported on the link supports point Q of dwang 44 rotationally.This link supports point Q is shown in Fig. 2, Fig. 4, Fig. 6.For lower link 46, its upper end links with the lower end of last connecting rod 45 rotationally via spring catch 47, constitutes toggle link with last connecting rod 45.The lower end of this lower link 46 links with cross bar 30 rotationally.Main spring 48 has driving side 48a and slave end 48b, and this driving side 48a combines with handle arm 42, and this slave end 48b combines with spring catch 47.

Connection, the disconnection action of moving contact 22 with respect to fixed contact 21 is described.Under off-state shown in Figure 4, moving contact 22 separates with fixed contact 21, and these fixed contacts 21 and moving contact 22 are in off-state.Under this off-state, handle arm 42 is positioned at the position that is tilted to the left, and lower link 46 is in horizontal state.Under this off-state shown in Figure 4, if operating grip 41 is operated to clockwise direction, then with this operating grip 41, handle arm 42 is that middle mind-set clockwise direction rotates with fulcrum P, and handle arm 42 turns to the position that is tilted to the right shown in Figure 6.By the rotation of this handle arm 42, the driving side 48a of main spring 48 is that middle mind-set clockwise direction moves with the fulcrum P of handle arm 42.Driving side 48a by this main spring 48 moves, and the load direction of main spring 48 changes, make spring catch 47 from position shown in Figure 4 to its right-hand moving.By moving of this spring catch 47, as shown in Figure 6, lower link 46 becomes erectility, and cross bar 30 rotates to clockwise direction, the moving contact 22 on the movable contact 23 is contacted with fixed contact 21, thereby become on-state.

Under on-state shown in Figure 6, if operating grip 41 is operated to counter clockwise direction, then with this operating grip 41, handle arm 42 is that middle mind-set is counterclockwise rotated with fulcrum P, and handle arm 42 turns to the position that is tilted to the left shown in Figure 4.By the rotation of this handle arm 42, the driving side 48a of main spring 48 is that middle mind-set counterclockwise moves with the fulcrum P of handle arm 42.Driving side 48a by this main spring 48 moves, and the load direction of main spring 48 is changed, and spring catch 47 is moved to left from position shown in Figure 6.Because this spring catch 47 moves, and as shown in Figure 4, lower link 46 recovers horizontal state, and cross bar 30 rotates to counterclockwise, the moving contact 22 on the movable contact 23 is separated with fixed contact 21, thereby become off-state.

In addition, under on-state shown in Figure 6,, remove the engaging between this chain shot 34 and the dwang 44 if over current trip 33 actions then make chain shot 34 move.Because dwang 44 is continued to the clockwise direction pretension by main spring 48, so by removing and the engaging of chain shot 34, dwang 44 rotates to clockwise direction.By the rotation of this dwang 44, handle arm 42 is the center with fulcrum P, from the extremely centre position shown in Figure 2 of rotated position that is tilted to the right shown in Figure 6.By the rotation of this handle arm 42, the driving side 48a of main spring 48 is compared with spring catch 47 relatively move to the right side, beginning is to spring catch 47 effects power upward.By this spring catch 47 is moved upward, and make cross bar 30 upward to lifting, lower link 46 becomes middle erectility shown in Figure 2, and the moving contact 22 on the movable contact 23 separates with fixed contact 21, thereby becomes tripped condition shown in Figure 2.

In addition, under tripped condition shown in Figure 2, off-state shown in Figure 4 and on-state shown in Figure 6, extract handle arm 42, go up connecting rod 45, lower link 46 and support frame 43 and in their relation shown in Fig. 3, Fig. 5, Fig. 7.In Fig. 3, with the handle arm under the tripped condition shown in Figure 2 42, go up that connecting rod 45, lower link 46 and support frame 43 extract and relation that they are shown from Fig. 2.In Fig. 5, with the handle arm under the off-state shown in Figure 4 42, go up that connecting rod 45, lower link 46 and support frame 43 extract and relation that they are shown from Fig. 4.In Fig. 7, with the handle arm under the on-state shown in Figure 6 42, go up that connecting rod 45, lower link 46 and support frame 43 extract and relation that they are shown from Fig. 6.

Because support frame 43 is fixed on partition wall 11C, the 11D of insulation base station 11, so under any one state in the on-state shown in the off-state shown in the tripped condition shown in Fig. 2,3, Fig. 4,5 and Fig. 6,7, all be positioned at identical position.Handle arm 42 supported frameworks 43 support rotationally at fulcrum P place, are that rotate at the center with this fulcrum P.This handle arm 42 mediates under the tripped condition shown in Fig. 2,3, under the off-state shown in Fig. 4,5, become from the be tilted to the left position of middle position after counterclockwise rotating, under the on-state shown in Fig. 6,7, become from the position that is tilted to the right of middle position after clockwise direction rotates.Erectility in the middle of lower link 46 becomes under the tripped condition shown in Fig. 2,3 becomes horizontal state under the off-state shown in Fig. 4,5, in addition, become erectility under the on-state shown in Fig. 6,7.

Fig. 8 is the front view that the handle arm in the execution mode 1 42 and support frame 43 partial cutaway is cut and represent with associated member.For handle arm 42, specifically the thickness even metal plate that will be made of for example iron plate is crooked and form, and as shown in Figure 8, has upper plate 421 and pair of side plates 422,423.Pair of side plates 422,423 is extended each other in fact abreast from the two ends of upper plate 421.Pair of side plates 422,423 has mutually the same thickness of slab, in addition, has mutually the same side view.Between pair of side plates 422,423, dispose a pair of dwang 441,442, a pair of connecting rod 451,452, a pair of lower link 461,462, spring catch 47 and a pair of main spring 481,482 gone up.

The iron plate that a pair of dwang 441,442 uses mutually the same thickness of slab forms mutually the same side view, is configured in the inner surface of each side plate 422,423 of handle arm 42, constitutes dwang 44.The iron plate that a pair of upward connecting rod 451,452 also uses mutually the same thickness of slab forms mutually the same side view, and connecting rod 45 on the formation.The iron plate that a pair of lower link 461,462 also uses mutually the same thickness of slab forms mutually the same side view, constitutes lower link 46.A pair of lower link 461,462 utilizes spring catch 47 and a pair of connecting rod 451,452 of going up to link.A pair of main spring 481,482 also forms shape and the mutually the same helical spring of size, constitutes main spring 48.The driving side 48a card of main spring 481,482 ends on the lower surface of the upper plate 421 of handle arm 42, and in addition, their slave end 48b and spring catch 47 cards end.

Support frame 43 is made of pair of frames plate 431,432.This pair of frames plate 431,432 forms mutually the same side view by the metallic plate that for example iron plate constitutes.In execution mode 1, each frame plate 431,432 uses separately with the iron plate of handle arm 42 identical thicknesss of slab and is shaped, and each frame plate 431,432 has the thickness of slab identical with each side plate 422,423 of handle arm 42.

Fig. 9 be expression in the execution mode 1 handle arm 42 and the exploded view of support frame 43, Fig. 9 (a) is the front view of handle arm 42, Fig. 9 (b) is the face side profile of expression support frame 43, Fig. 9 (c) is the left side view of handle arm 42.

The pair of side plates 422,423 of handle arm 42 has handle arm body portion AB, the RC of center of rotation portion separately, and the end of RC of center of rotation portion and handle arm body portion AB is continuous and integrally formed with handle arm body portion AB.Handle arm body portion AB forms the major part of side plate 422,423, and its thickness of slab is t0.This handle arm body portion AB has inner surface s11 and outer surface s21, and these inner surfaces s11 and outer surface s21 are parallel to each other.The inner surface s11 of each handle arm body portion AB of pair of side plates 422,423 across interval D toward each other.

The RC of center of rotation portion is the part that constitutes the center of rotation of handle arm 42, and the pair of frames plate 431,432 of the supported framework 43 of the RC of this center of rotation portion supports rotationally.The thickness of slab of the RC of center of rotation portion is t1.Between the thickness of slab t0 of the thickness of slab t1 of the RC of this center of rotation portion and handle arm body portion AB, there is the relation of following formula (1).As can be known clear and definite from formula (1), thickness of slab t1 is than thickness of slab t0 small size A.

t1＝t0-A (1)

The RC of center of rotation portion has inner surface s12 and outer surface s22, and these inner surfaces s12 and outer surface s22 are parallel to each other.The inner surface s12 of the RC of center of rotation portion is positioned on the plane identical with the inner surface s11 of handle arm body portion AB, and the inner surface s12 of each RC of center of rotation portion of pair of side plates 422,423 also across interval D toward each other.The outer surface s22 of the RC of center of rotation portion is on the plane of the inner surface s11 that comprises handle arm body portion AB and comprise between the plane of outer surface s21 of this handle arm body portion AB, and is close to the plane that comprises inner surface s11 with size A from the plane of the outer surface s21 that comprises handle arm body portion AB.

Each RC of center of rotation portion of the pair of side plates 422,423 of handle arm 42, in execution mode 1, pair of frames plate 431,432 protrusions to support frame 43 protrude the circular-arc plane of rotation CR that forms the protrusion shape on end face at this.In execution mode 1, the RC of this center of rotation portion is formed in the scope of thickness of slab t0 of handle arm body portion AB, does not protrude to its outside from the scope of the thickness of slab t0 of this handle arm body portion AB.

The pair of frames plate 431,432 of support frame 43 has framework body portion FB, the RS of rotational support portion and thin-walled TW separately.RS of rotational support portion and thin-walled TW are formed on the end of framework body portion FB.Framework body portion FB forms the major part of pair of frames plate 431,432, and thickness of slab is t0.This thickness of slab t0 equates with the thickness of slab of handle arm body portion AB.Each framework body portion FB of pair of frames plate 431,432 has inner surface s31 and outer surface s41, and these inner surfaces s31 and outer surface s41 are parallel to each other.The inner surface s31 of each framework body portion FB of pair of frames plate 431,432 across interval D toward each other.Interval between the inner surface s11 of this interval D and each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42 equates.

Each RS of rotational support portion of pair of frames plate 431,432 is each RC of center of rotation portion of the pair of side plates 422,423 of support handle arm 42 rotationally.Each RS of rotational support portion is a concave shape in execution mode 1, has the circular-arc supporting surface CS of concave shape.The circular-arc plane of rotation CR of the diameter of this circular-arc supporting surface CS and the pairing center of rotation RC of portion about equally.These circular-arc plane of rotation CR and circular-arc supporting surface CS contact with each other on the fulcrum P of Fig. 2～shown in Figure 7, and handle arm 42 is that rotate at the center with this fulcrum P.

Circular-arc supporting surface CS forms from the inner surface s31 of framework body portion FB and begins to have width B.This width B is represented by following formula (2).

B＝t1 (2)

Here, t1 is the thickness of slab t1 in the formula (1).

On the end of each framework body portion FB of pair of frames plate 431,432, the RS of rotational support portion and the thin-walled TW and the framework body portion FB that are adjacent are integrally formed.This thin-walled TW is formed at the outer surface s41 side of this framework body portion FB on the end of each framework body portion FB of pair of frames plate 431,432, along the plane that comprises the outer surface s41 of framework body portion FB, prolong to the RC of center of rotation portion of handle arm 42.Thin-walled TW has thickness A.This thickness A equates with size A in the formula (1).This thin-walled TW has inner surface s32 and outer surface s42, and these inner surfaces s32 and outer surface s42 are parallel to each other.In present embodiment 1, the outer surface s42 of thin-walled TW is positioned on the plane identical with the outer surface s41 of framework body portion FB.The inner surface s32 of thin-walled TW is present in the plane of the inner surface s31 that comprises framework body portion FB and comprises between the plane of its outer surface s41.

Thin-walled TW and the RS of rotational support portion all are formed in the scope of thickness of slab t0 of the framework body portion FB on the frame plate 431,432, protrude to the outside from the scope of this thickness of slab t0.Be formed on the inner surface s32 of each the thin-walled TW on the pair of frames plate 431,432, under the circular-arc plane of rotation CR state of contact of the circular-arc supporting surface CS of the RS of rotational support portion and the RC of center of rotation portion, contact with the outer surface s22 of the RC of center of rotation portion, prevent handle arm 42 to the left and right directions of Fig. 9 (a), be the extending direction skew of cross bar 30.Be formed on the outer surface s42 of each the thin-walled TW on the pair of frames plate 431,432, under the circular-arc plane of rotation CR state of contact of the circular-arc supporting surface CS of the RS of rotational support portion and the RC of center of rotation portion, be positioned on the plane of outer surface s21 of handle arm body portion AB of the pair of side plates 422,423 that comprises handle arm 42.

In execution mode 1, in the scope of the thickness of slab t0 of each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42, form the center of rotation RC of portion, in addition, in the scope of the thickness of slab t0 of each framework body portion FB of the pair of frames plate 431,432 of support frame 43, form rotational support RS of portion and thin-walled TW, its result, the RC of center of rotation portion, the RS of rotational support portion and thin-walled TW all are positioned at the scope of thickness of slab t0, do not protrude to the outside from the scope of this thickness of slab t0.Therefore, the RC of these center of rotation portions, the RS of rotational support portion and thin-walled TW can not exceed the required width of handle arm 42 or support frame 43 and protrude laterally, handle arm 42 and support frame 43 can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, because can not exceeding the required width of handle arm 42 or support frame 43, the RC of center of rotation portion, the RS of rotational support portion and thin-walled TW do not protrude laterally, so when guaranteeing to remain on the phase insulation of the movable contact 23 on the cross bar 30, the RC of center of rotation portion, the RS of rotational support portion and thin-walled TW can not make insulating properties reduce, can guarantee opening performance, in addition, because thin-walled TW also forms with the framework body portion FB of support frame 43, so can realize the minimizing of component costs, assembly cost is suppressed for lower.

Execution mode 2

Figure 10 is the front view that the handle arm in the execution mode 2 of circuit-breaker involved in the present invention and support frame partial cutaway is cut and represent with associated member, and Figure 11 is the handle arm in the related circuit-breaker of expression execution mode 2 and the exploded view of support frame.Figure 11 (a) is the front view of the handle arm of the related circuit-breaker of expression execution mode 2, Figure 11 (b) is the face side profile of the support frame of the related circuit-breaker of expression execution mode 2, and Figure 11 (c) is the end view of the handle arm of the related circuit-breaker of expression execution mode 2.

In the related circuit-breaker of present embodiment 2, the pair of frames plate 431,432 of the support frame 43 in the execution mode 1 is deformed into has thin-walled TW1.This thin-walled TW1 compares with thin-walled TW in the execution mode 1 employed support frame 43, forms to compare slightly with the outer surface s41 of this framework body portion FB to protrude laterally.Other parts and the support frame 43 in the execution mode 1 of support frame 43 constitute in the same manner.The circuit-breaker that execution mode 2 is related, other parts and execution mode 1 constitute in the same manner, and handle arm 42 also constitutes in the same manner with execution mode 1.

In execution mode 2 employed support frames 43, from Figure 10,11 as can be known clear and definite, thin-walled TW1 with thickness A 1 is on the end of the framework body portion FB of pair of frames plate 431,432, with integrally formed with mode and this framework body portion FB of the RS of rotational support portion adjacency.This thin-walled TW1 is in the outer surface s41 side of each framework body portion FB of pair of frames plate 431,432, and s41 protrudes slightly from this outer surface, prolongs with the plane parallel ground that comprises this outer surface s41.The thickness A of the thin-walled TW of the support frame 43 that uses in thickness A 1 and the execution mode 1 is compared greatly, is A1＞A.The outer surface s42 of this thin-walled TW1 compares with the plane of the outer surface s41 that comprises framework body portion FB and is positioned at the slightly outside, but the inner surface s32 of thin-walled TW1 is on the plane of the outer surface s41 that comprises framework body portion FB with comprise between the plane of inner surface s31 of this framework body portion FB.Because the inner surface s32 of this thin-walled TW1 is on the plane of the outer surface s41 that comprises framework body portion FB and comprise between the plane of inner surface s31 of this framework body portion FB, even so size that the outer surface s42 of thin-walled TW1 is protruded from the outer surface s41 of framework body portion FB, be made as for example 1/4 of the thickness of slab t0 that is less than or equal to framework body portion FB, the thickness A 1 of thin-walled TW1 also is enough to make thin-walled TW1 to have required intensity.

The circular-arc supporting surface CS of each RS of rotational support portion on the end of the pair of frames plate 431,432 that is formed at support frame 43, under the circular-arc plane of rotation CR state of contact of the RC of center of rotation portion on the end of the pair of side plates 422,423 that is formed at handle arm 42, the inner surface s32 that is formed at the thin-walled TW1 on the end of framework body portion FB of pair of frames plate 431,432 contacts with the outer surface s22 of the RC of center of rotation portion, prevent handle arm 42 to the left and right directions of Figure 11 (a), be the extending direction skew of cross bar 30.

In execution mode 2, because pair of side plates 422 in handle arm 42, form the center of rotation RC of portion in the scope of the thickness of slab t0 of each handle arm body portion AB of 423, in addition, pair of frames plate 431 at support frame 43, form the rotational support RS of portion in the scope of the thickness of slab t0 of each framework body portion FB of 432, and, for thin-walled TW1, its inner surface s32 is on the plane of the outer surface s41 that comprises framework body portion FB and comprise between the plane of inner surface s31 of this framework body portion FB, so the outer surface s42 that can make thin-walled TW1 is from frame plate 431, the size that the outer surface s41 of 432 framework body portion FB protrudes reduces.Therefore, the RC of these center of rotation portions, the RS of rotational support portion and thin-walled TW1 can not exceed the required width of handle arm 42 or support frame 43 and significantly protrude laterally, handle arm 42 and support frame 43 roughly can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, in execution mode 2, because the RC of center of rotation portion, the RS of rotational support portion, and thin-walled TW1 can not exceed the required width of handle arm 42 or support frame 43 and protrudes significantly laterally, so when guaranteeing to remain in the phase insulation of the movable contact 23 on the cross bar 30, the RC of center of rotation portion, the RS of rotational support portion, and thin-walled TW1 can not make insulating properties reduce, can guarantee opening performance, and, because thin-walled TW1 is also integrally formed with the framework body portion FB of support frame 43, so can realize the minimizing of component costs, assembly cost is suppressed for lower.

Execution mode 3

Figure 12 is the handle arm in the execution mode 3 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 12 (a) is the front view of the handle arm of the related circuit-breaker of expression execution mode 3, Figure 12 (b) is the face side profile of the support frame of the related circuit-breaker of execution mode 3, and Figure 12 (c) is the left side view of the handle arm of the related circuit-breaker of execution mode 3.

In present embodiment 3, handle arm 42A is made of the different metallic plates such as iron plate of thickness with support frame 43.Specifically, in execution mode 3, use support frame 43 shown in Figure 12 and handle arm 42A.Support frame 43 is identical with support frame 43 in the execution mode 1, but the inner surface s31 of each framework body portion FB of pair of frames plate 431,432 is relative across interval D 1.The interval D of the inner surface s31 of each framework body portion FB of the frame plate 431,432 of the support frame 43 in this interval D 1 and the execution mode 1 is compared less.

Handle arm 42A compares with the handle arm 42 in the execution mode 1, is made of the metallic plate of thinner thickness.This handle arm 42A is that the iron plate of t2 constitutes by thickness of slab, and this thickness of slab t2 is t2＜t0.Handle arm 42 in handle arm 42A and the execution mode 1 has upper plate 421 and pair of side plates 422,423 in the same manner, and these upper plates 421 and pair of side plates 422,423 are that the iron plate of t2 constitutes by thickness of slab.The pair of side plates 422,423 of handle arm 42A in the execution mode 3 is shown in Figure 12 (a), and having thickness of slab is the handle arm body portion AB of t2 and the RC1 of center of rotation portion that thickness of slab is t2.The inner surface s11 of each handle arm body portion AB of pair of side plates 422,423 across interval D 1 toward each other.The RC1 of center of rotation portion forms from handle arm body portion AB and protrudes laterally, and is continuous and integrally formed with handle arm body portion AB with the end of handle arm body portion AB.Its result, the inner surface s12 of each RC1 of center of rotation portion of pair of side plates 422,423 is across than the big interval D 2 of interval D 1 toward each other.Other parts and the execution mode 1 of the circuit-breaker that execution mode 3 is related constitute in the same manner.The RC1 of center of rotation portion has inner surface s12 parallel to each other and outer surface s22, in addition, has the circular-arc plane of rotation CR that protrudes shape on its protruding end.

In execution mode 3, use the support frame 43 identical with execution mode 1, the thickness of slab of each framework body portion FB of the pair of frames plate 431,432 in this support frame 43 is t0, this thickness of slab t0 is t0＞t2.In present embodiment 3; thin-walled TW forms the circular-arc supporting surface CS of the RS of rotational support portion on the end of each the framework body portion FB that is formed at pair of frames plate 431,432; under the circular-arc plane of rotation CR state of contact of the RC1 of center of rotation portion on the end of each handle arm body portion AB of the pair of side plates 422,423 that is formed at handle arm 42A, this thin-walled TW and the RS of rotational support portion adjacency.The framework body portion FB of this thin-walled TW and pair of frames plate 431,432 is integrally formed.Under circular-arc supporting surface CS and circular-arc plane of rotation CR state of contact, the inner surface s32 of thin-walled TW contacts with the outer surface s22 of the RC1 of center of rotation portion, prevent handle arm 42A to the left and right directions of Figure 12 (a), be the extending direction skew of cross bar 30.

In execution mode 3, the width of the width B of circular-arc supporting surface CS and circular-arc plane of rotation CR, be that the thickness of slab t2 of the RC1 of center of rotation portion compares greatly, be B＞t2.Therefore, under the inner surface s32 state of contact of the outer surface s22 of the RC1 of center of rotation portion and thin-walled TW, circular-arc plane of rotation CR is limited in the width B of circular-arc supporting surface CS.

In present embodiment 3, can obtain the effect identical with execution mode 1, and, in execution mode 3, support frame 43 can make up with handle arm 42A, can realize the standardization of support frame 43, wherein, handle arm 42A is made of the iron plate of the thickness of slab t2 different with the thickness of slab t0 of the framework body portion FB of the pair of frames plate 431,432 of support frame 43.

Execution mode 4

Figure 13 is the handle arm in the execution mode 4 of circuit-breaker involved in the present invention and the exploded view of support frame, the front view of the handle arm of the circuit-breaker that Figure 13 (a) expression execution mode 4 is related, the face side profile of the support frame of the circuit-breaker that Figure 13 (b) expression execution mode 4 is related.

In present embodiment 4, use handle arm 42B and the support frame 43B shown in Figure 13 (a) and (b).In handle arm 42B, be formed at the outer surface s22 of the RC2 of center of rotation portion on the end of handle arm body portion AB of pair of side plates 422,423, be on the plane identical with the outer surface s21 of handle arm body portion AB, the inner surface s12 of the RC2 of center of rotation portion compares with the plane of the inner surface s11 that comprises handle arm body portion AB with size A and is positioned at the outside.In addition, in support frame 43B, in the inner surface s31 side of the end of each framework body portion FB of pair of frames plate 431,432, along thin-walled TW and the RS2 of rotational support portion adjacency that the plane that comprises this inner surface s31 prolongs, FB is continuous and integrally formed with the framework body portion.Other parts and the execution mode 1 of the circuit-breaker that execution mode 4 is related constitute in the same manner.

In handle arm 42B, the inner surface s11 of each handle arm body portion AB of pair of side plates 422,423 is relative across interval D.In this handle arm 42B, be formed at the inner surface s12 of the RC2 of center of rotation portion on the end of each handle arm body portion AB of pair of side plates 422,423, relative across the interval D 3 of comparing " 2 * A " greatly with interval D.In support frame 43B, the inner surface s31 of each framework body portion FB of pair of frames plate 431,432 is relative across interval D, in addition, the inner surface s32 of the thin-walled TW that inner surface s31 side in the end of each framework body portion FB of pair of frames plate 431,432 forms, be positioned on the plane identical with the inner surface s31 of framework body portion FB, relative across interval D.

In present embodiment 4, each framework body portion FB of thin-walled TW and pair of frames plate 431,432 is integrally formed.This thin-walled TW forms in the mode with the RS2 of rotational support portion adjacency on the end of each framework body portion FB of pair of frames plate 431,432.The circular-arc supporting surface CS of the RS2 of rotational support portion on the end of the framework body portion FB that is formed at pair of frames plate 431,432, under the circular-arc plane of rotation CR state of contact of the RC2 of center of rotation portion on the end of each handle arm body portion AB of the pair of side plates 422,423 that is formed at handle arm 42B, the outer surface s42 of this thin-walled TW contacts with the inner surface s12 of the RC2 of center of rotation portion, prevent handle arm 42B to the left and right directions of Figure 13 (a), be the extending direction skew of cross bar 30.

In present embodiment 4, because the RC2 of center of rotation portion of handle arm 42B is in the scope of thickness of slab t0 of handle arm body portion AB, the RS2 of rotational support portion of support frame 43B and thin-walled TW are in the scope of thickness of slab t0 of framework body portion FB, so can obtain the effect identical with execution mode 1.

Execution mode 5

Figure 14 is the handle arm in the execution mode 5 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 14 (a) is the front view of the handle arm of the related circuit-breaker of expression execution mode 5, and Figure 14 (b) is the face side profile of the support frame of the related circuit-breaker of expression execution mode 5.

In present embodiment 5, the thin-walled TW of the support frame 43B in the execution mode 4 is replaced into and the identical thin-walled TW1 of thin-walled TW1 in the execution mode 2.Other parts of the support frame 43B of execution mode 5 and execution mode 4 constitute in the same manner.Other parts and the execution mode 4 of the circuit-breaker that present embodiment 5 is related constitute in the same manner.

In present embodiment 5, on support frame 43B; thin-walled TW1 and the RS2 of rotational support portion adjacency; and integrally formed continuously; wherein; this thin-walled TW1 is positioned at the inner surface s31 side of end of each framework body portion FB of pair of frames plate 431,432, compare slightly with this inner surface s31 and protrude to the inside, and prolong along the plane that comprises this inner surface s31 with framework body portion FB.This thin-walled TW1 has thickness A 1.The inner surface s32 of this thin-walled TW1 compares with the plane of the inner surface s31 that comprises framework body portion FB and is positioned at slightly inboardly, but the outer surface s42 of this thin-walled TW1 is on the plane of the outer surface s41 that comprises framework body portion FB with comprise between the plane of inner surface s31 of this framework body portion FB.Because the outer surface s42 of thin-walled TW1 is on the plane of the outer surface s41 that comprises framework body portion FB and comprise between the plane of inner surface s31 of this framework body portion FB, even so size that the inner surface s32 of thin-walled TW1 is protruded from the inner surface s31 of framework body portion FB, for example be made as 1/4 of the thickness of slab t0 that is less than or equal to framework body portion FB, the thickness A 1 of thin-walled TW1 also is enough to make thin-walled TW1 to have required intensity.

In present embodiment 5, be formed at pair of frames plate 431, the circular-arc supporting surface CS of the RS2 of rotational support portion on the end of each framework body portion FB of 432, with the pair of side plates 422 that is formed at handle arm 42B, under the circular-arc plane of rotation CR state of contact of the RC2 of center of rotation portion on the end of 423 handle arm body portion AB, be formed at pair of frames plate 431, the outer surface s42 of thin-walled TW1 on the end of 432 framework body portion FB, contact with the inner surface s12 of the RC2 of center of rotation portion, prevent the left and right directions of handle arm 42B to Figure 14 (a), it is the extending direction skew of cross bar 30.

In execution mode 5, because pair of side plates 422 at handle arm 42B, form the center of rotation RC2 of portion in the scope of the thickness of slab t0 of each handle arm body portion AB of 423, in addition, pair of frames plate 431 at support frame 43, form the rotational support RS2 of portion in the scope of the thickness of slab t0 of each framework body portion FB of 432, and, for thin-walled TW1, its inner surface s32 slightly protrudes from the inner surface s31 of framework body portion FB, but its outer surface s42 is on the plane of the outer surface s41 that comprises framework body portion FB and comprise between the plane of inner surface s31 of this framework body portion FB, so can be from frame plate 431,432 protrude laterally.Therefore, the RC2 of these center of rotation portions, the RS2 of rotational support portion and thin-walled TW1 can not exceed the required width of handle arm 42B or support frame 43B and protrude laterally, handle arm 42B and support frame 43B can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, in execution mode 5, because the RC2 of center of rotation portion, the RS2 of rotational support portion, and the required width that thin-walled TW1 does not exceed handle arm 42B or support frame 43B protrudes laterally, so when guaranteeing the phase insulation of the movable contact 23 that cross bar 30 is kept, the RC2 of center of rotation portion, the RS2 of rotational support portion, and thin-walled TW1 can not make insulating properties reduce, can guarantee opening performance, and, because thin-walled TW1 is also integrally formed with the framework body portion FB of support frame 43B, so can realize the minimizing of component costs, assembly cost is suppressed for lower.

Execution mode 6

Figure 15 is the handle arm in the execution mode 6 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 15 (a) is the front view of the handle arm in the related circuit-breaker of expression execution mode 6, Figure 15 (b) is the face side profile of the support frame in the related circuit-breaker of expression execution mode 6, Figure 15 (c) is the end view of the handle arm in the related circuit-breaker of expression execution mode 6, and Figure 15 (d) is the end view of the support frame in the related circuit-breaker of expression execution mode 6.

In execution mode 6, use handle arm 42C and the support frame 43C shown in Figure 15 (a)～(d).Handle arm 42C obtains the distortion of the handle arm 42B in the execution mode 4, and the RC3 of center of rotation portion is deformed into, and has the circular-arc plane of rotation CR of concave shape on its end face.Other parts of handle arm 42C and the handle arm 42B in the execution mode 4 constitute in the same manner.Support frame 43C obtains the distortion of the support frame 43B in the execution mode 4, and the RS3 of rotational support portion is deformed into has the circular-arc supporting surface CS that protrudes shape.The RS3 of this rotational support portion forms between recess C1, the C2 of both sides and protrudes shape shown in Figure 15 (d).Other parts of support frame 43C and the support frame 43B in the execution mode 4 constitute in the same manner.

In execution mode 6, thin-walled TW is from the end of each framework body portion FB of pair of frames plate 431,432, and is continuous and integrally formed with this framework body portion FB with this end.This thin-walled TW and the inner adjacency of the RS3 of rotational support portion that protrudes shape at recess C1, the C2 at its two ends extend to the high position of RS3 than rotational support portion along the plane that comprises the inner surface s31 of framework body portion FB.The circular-arc supporting surface CS of the RS3 of rotational support portion on the end of each the framework body portion FB that is formed at pair of frames plate 431,432, under the circular-arc plane of rotation CR state of contact of the RC3 of center of rotation portion on the end of each the handle arm body portion AB that is formed at pair of side plates 422,423; the outer surface s42 of thin-walled TW contacts with the inner surface s12 of the RC3 of center of rotation portion, prevent handle arm 42C to the left and right directions of Figure 15 (a), be the extending direction skew of cross bar 30.

According to present embodiment 6, can obtain the effect identical with execution mode 4, and, owing to can make thin-walled TW observe following area increase from the side, so can further improve the mechanical strength of thin-walled TW.

Execution mode 7

Figure 16 is the handle arm in the execution mode 7 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 16 (a) is the front view of the handle arm in the related circuit-breaker of expression execution mode 7, Figure 16 (b) is the face side profile of the support frame in the related circuit-breaker of expression execution mode 7, Figure 16 (c) is the end view of the handle arm in the related circuit-breaker of expression execution mode 7, and Figure 16 (d) is the end view of the support frame in the related circuit-breaker of expression execution mode 7.

In the related circuit-breaker of execution mode 7, use handle arm 42D and the support frame 43D shown in Figure 16 (a)～(d).Handle arm 42D obtains 42 distortion of the handle arm in the execution mode 1, and support frame 43D obtains 43 distortion of the support frame in the execution mode 1.Other parts and the execution mode 1 of the circuit-breaker that execution mode 7 is related constitute in the same manner.

The pair of side plates 422,423 of handle arm 42D has handle arm body portion AB and the RC4 of center of rotation portion separately, and the RC4 of center of rotation portion is on the end of handle arm body portion AB, and is continuous and integrally formed with handle arm body portion AB with handle arm body portion AB.Handle arm body portion AB forms the major part of side plate 422,423, and its thickness of slab is t0.This handle arm body portion AB has inner surface s11 and outer surface s21, and these inner surfaces s11 and outer surface s21 are parallel to each other.The inner surface s11 of each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42D across interval D toward each other.

The RC4 of center of rotation portion of handle arm 42D is the part that becomes the center of rotation of handle arm 42D, and the pair of frames plate 431,432 of the supported framework 43D of the RC4 of this center of rotation portion supports rotationally.The thickness of slab of the RC4 of center of rotation portion is t1.Between the thickness of slab t0 of the thickness of slab t1 of the RC4 of this center of rotation portion and handle arm body portion AB, there is the relation of formula (1).As can be known clear and definite from formula (1), thickness of slab t1 is than thickness of slab t0 small size A.

The RC4 of center of rotation portion of handle arm 42D has inner surface s12 and outer surface s22, and these inner surfaces s12 and outer surface s22 are parallel to each other.The inner surface s12 of the RC4 of center of rotation portion of handle arm 42D is positioned on the plane identical with the inner surface s11 of handle arm body portion AB, and the inner surface s12 of each RC4 of center of rotation portion of pair of side plates 422,423 also across interval D toward each other.The outer surface s22 of the RC4 of center of rotation portion of handle arm 42D, on the plane of the inner surface s11 that comprises handle arm body portion AB with comprise between the plane of outer surface s21 of this handle arm body portion AB, close with size A to the plane that comprises inner surface s11 from the plane of the outer surface s21 that comprises handle arm body portion AB.

Each RC4 of center of rotation portion of the pair of side plates 422,423 of handle arm 42D, the pair of frames plate 431,432 to support frame 43D in execution mode 7 protrudes, and protrudes at it to form the circular-arc plane of rotation CR that protrudes shape on end face.

On handle arm 42D, the outer surface s22 of thin-walled TW2 and the RC4 of center of rotation portion forms in abutting connection with ground.The thickness of this thin-walled TW2 is A.The end of the handle arm body portion AB of this thin-walled TW2 and pair of side plates 422,423 is continuous, and integrally formed with handle arm body portion AB.This thin-walled TW2 has inner surface s32 and outer surface s42, and these inner surfaces s32 and outer surface s42 are parallel to each other.Thin-walled TW2 forms circular-arcly in than polarizers of big angle scope shown in Figure 16 (c), covers the outer surface s22 of the center of rotation RC4 of portion, and exceeds this outer surface s22 and protrude to periphery.The inner surface s32 of this thin-walled TW2 contacts with the outer surface s22 of the RC4 of center of rotation portion, but the inner surface s32 of this thin-walled TW2 also exceeds the outer surface s22 of the RC4 of center of rotation portion and further protrudes to periphery.

In execution mode 7, RC4 of center of rotation portion and thin-walled TW2 are formed in the scope of thickness of slab t0 of handle arm body portion AB, do not protrude to its outside from the scope of the thickness of slab t0 of this handle arm body portion AB.

The pair of frames plate 431,432 of support frame 43D has framework body portion FB and the RS4 of rotational support portion separately.The RS4 of rotational support portion is formed on the end of framework body portion FB.Framework body portion FB forms the major part of pair of frames plate 431,432, and thickness of slab is t0.This thickness of slab t0 equates with the thickness of the handle arm body portion AB of the pair of side plates 422,423 of handle arm 42D.The framework body portion FB of the pair of frames plate 431,432 of support frame 43D has inner surface s31 and outer surface s41, and these inner surfaces s31 and outer surface s41 are parallel to each other.The inner surface s31 of each framework body portion FB of the pair of frames plate 431,432 of support frame 43D across interval D toward each other.Interval between the inner surface s11 of this interval D and each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42D equates.

The end of each framework body portion FB of the pair of frames plate 431,432 of RS4 of rotational support portion and support frame 43D is continuous, and integrally formed with framework body portion FB.The RS4 of this rotational support portion is the RC4 of center of rotation portion of the pair of side plates 422,423 of support handle arm 42D rotationally.The RS4 of this rotational support portion is a concave shape in execution mode 7, has the circular-arc supporting surface CS of concave shape.The circular-arc plane of rotation CR of the diameter of this circular-arc supporting surface CS and the pairing center of rotation RC4 of portion about equally.These circular-arc plane of rotation CR and circular-arc supporting surface CS contact with each other on the fulcrum P of Fig. 2～shown in Figure 7, and handle arm 42D is that rotate at the center with this fulcrum P.

The circular-arc supporting surface CS of the RS4 of rotational support portion forms from the inner surface s31 of the end of framework body portion FB and begins to have width B.This width B is represented by formula (2).The RS4 of rotational support portion has inner surface s51 and outer surface s61, and these inner surfaces s51 and outer surface s61 are parallel to each other, and this inner surface s51 is positioned on the plane identical with the inner surface s31 of framework body portion FB.Its result, the outer surface s61 of the RS4 of rotational support portion is close to the inner surface s31 of framework body portion FB with size A from the plane of the outer surface s41 that comprises framework body portion FB.

In execution mode 7, the RS4 of rotational support portion of support frame 43D is formed in the scope of thickness of slab t0 of this framework body portion FB, protrudes laterally from the scope of this thickness of slab t0.

In execution mode 7, be formed at the inner surface s32 of the thin-walled TW2 on the pair of side plates 422,423 of handle arm 42D, under the circular-arc plane of rotation CR state of contact of the RC4 of center of rotation portion of the circular-arc supporting surface CS of the RS4 of rotational support portion and handle arm 42D, contact with the outer surface s61 of the RS4 of rotational support portion, prevent handle arm 42D to the left and right directions of Figure 16 (a), be the extending direction skew of cross bar 30.Under the circular-arc plane of rotation CR state of contact of the RC4 of center of rotation portion of the circular-arc supporting surface CS of the RS4 of rotational support portion and handle arm 42D, the outer surface s42 of thin-walled TW2 is positioned on the plane of outer surface s41 of framework body portion FB of the pair of frames plate 431,432 that comprises support frame 43D.

In execution mode 7, in the scope of the thickness of slab t0 of each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42D, form center of rotation RC4 of portion and thin-walled TW2, in addition, in the scope of the thickness of slab t0 of each framework body portion FB of the pair of frames plate 431,432 of support frame 43D, form the rotational support RS4 of portion, its result, the RC4 of center of rotation portion, thin-walled TW2 and the RS4 of rotational support portion all are positioned at the scope of thickness of slab t0, do not protrude to the outside from the scope of this thickness of slab t0.Therefore, the RC4 of these center of rotation portions, thin-walled TW2 and the RS4 of rotational support portion, can not exceed the required width of handle arm 42D or support frame 43D and protrude laterally, handle arm 42D and support frame 43D can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, in execution mode 7, because the RC4 of center of rotation portion; thin-walled TW2; and the RS4 of rotational support portion can not exceed the required width of handle arm 42D or support frame 43D and protrudes laterally; so when guaranteeing the phase insulation of the movable contact 23 that cross bar 30 is kept; the RC4 of center of rotation portion; thin-walled TW2; and the RS4 of rotational support portion can not make insulating properties reduce; can guarantee opening performance; and; because thin-walled TW2 is also integrally formed with the handle arm body portion AB of handle arm 42D;, assembly cost is suppressed for lower so can realize the minimizing of component costs.And, can utilize thin-walled TW2 to cover contact site between circular-arc plane of rotation CR and the circular-arc supporting surface CS with the scope of broad, can keep the lubricant in this contact site reliably, and prevent the intrusion of dust reliably to this contact site.

Execution mode 8

Figure 17 is the handle arm in the execution mode 8 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 17 (a) is the front view of the handle arm in the related circuit-breaker of expression execution mode 8, Figure 17 (b) is the face side profile of the support frame in the related circuit-breaker of expression execution mode 8, Figure 17 (c) is the end view of the handle arm in the related circuit-breaker of expression execution mode 8, and Figure 17 (d) is the end view of the support frame in the related circuit-breaker of expression execution mode 8.

In the related circuit-breaker of present embodiment 8, pair of frames plate 422,423 distortion with the handle arm 42D in the execution mode 7 make it have thin-walled TW3.This thin-walled TW3 compares with thin-walled TW2 among the execution mode 7 employed handle arm 42D, forms to compare slightly with the outer surface s41 of its handle arm body portion AB to protrude laterally.Other parts of handle arm 42D in the execution mode 8 and the handle arm 42D in the execution mode 7 constitute in the same manner.Other parts and the execution mode 7 of the circuit-breaker that execution mode 8 is related constitute in the same manner, and support frame 43D also constitutes in the same manner with execution mode 7.

In execution mode 8 employed handle arm 42D, as can be known clear and definite from Figure 17 (a), thin-walled TW3 with thickness A 1 is on the end of the handle arm body portion AB of pair of side plates 422,423, with integrally formed with mode and this handle arm body portion AB of the RC4 of center of rotation portion adjacency.This thin-walled TW3 is in the outer surface s21 side of the end of each handle arm body portion AB of pair of side plates 422,423, and s21 protrudes slightly from this outer surface, prolongs with the plane parallel ground that comprises this outer surface s21.Thickness A 1 is compared greatly with the thickness A of the thin-walled TW2 of execution mode 7 employed handle arm 42D, is A1＞A.The outer surface s42 of this thin-walled TW3 compares with the plane of the outer surface s21 that comprises handle arm body portion AB and is positioned at the slightly outside, but the inner surface s32 of this thin-walled TW3 is on the plane of the outer surface s21 that comprises handle arm body portion AB with comprise between the plane of inner surface s11 of this handle arm body portion AB.Because the inner surface s32 of this thin-walled TW3 is on the plane of the outer surface s21 that comprises handle arm body portion AB and comprise between the plane of inner surface s11 of this handle arm body portion AB, even so size that the outer surface s42 of thin-walled TW3 is protruded from the outer surface s21 of handle arm body portion AB, be made as 1/4 of the thickness of slab t0 that for example is less than or equal to handle arm body portion AB, the thickness A 1 of thin-walled TW3 also is enough to make thin-walled TW3 to have required intensity.

In execution mode 8, the circular-arc supporting surface CS of the RS4 of rotational support portion on the end of the pair of frames plate 431,432 that is formed at support frame 43D, under the circular-arc plane of rotation CR state of contact of the RC4 of center of rotation portion on the end of the pair of side plates 422,423 that is formed at handle arm 42D, the inner surface s32 that is formed at the thin-walled TW3 on the end of pair of side plates 422,423 contacts with the outer surface s61 of the RS4 of rotational support portion, prevent handle arm 42D to the left and right directions of Figure 17 (a), be the extending direction skew of cross bar 30.

In execution mode 8, because pair of side plates 422 at handle arm 42D, form the center of rotation RC4 of portion in the scope of the thickness of slab t0 of each handle arm body portion AB of 423, in addition, pair of frames plate 431 at support frame 43D, form the rotational support RS4 of portion in the scope of the thickness of slab t0 of each framework body portion FB of 432, and, for thin-walled TW3, its inner surface s32 is on the plane of the outer surface s21 that comprises handle arm body portion AB and comprise between the plane of inner surface s11 of this handle arm body portion AB, so the outer surface s42 that can make this thin-walled TW3 is from side plate 422, the size that the outer surface s21 of 423 handle arm body portion AB protrudes reduces.Therefore, the RC4 of these center of rotation portions, thin-walled TW3 and the RS4 of rotational support portion can not exceed the required width of handle arm 42D or support frame 43D and protrude significantly laterally, handle arm 42D and support frame 43D roughly can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, in execution mode 8, because the RC4 of center of rotation portion; thin-walled TW3; and the RS4 of rotational support portion can not exceed the required width of handle arm 42D or support frame 43D and protrudes significantly laterally; so when guaranteeing the phase insulation of the movable contact 23 that cross bar 30 is kept; the RC4 of center of rotation portion; thin-walled TW3; and the RS4 of rotational support portion can not make insulating properties reduce; can guarantee opening performance; and; because thin-walled TW3 is also integrally formed with the handle arm body portion AB of handle arm 42D;, assembly cost is suppressed for lower so can realize the minimizing of component costs.

Execution mode 9

Figure 18 is the handle arm in the execution mode 9 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 18 (a) is the front view of the handle arm in the related circuit-breaker of expression execution mode 9, Figure 18 (b) is the face side profile of the support frame in the related circuit-breaker of expression execution mode 9, Figure 18 (c) is the end view of the handle arm in the related circuit-breaker of expression execution mode 9, and Figure 18 (d) is the end view of the support frame in the related circuit-breaker of expression execution mode 9.

In the related circuit-breaker of execution mode 9, use handle arm 42E and the support frame 43E shown in Figure 18 (a)～(d).Handle arm 42E will obtain after 42 distortion of the handle arm in the execution mode 1, and support frame 43E will obtain after 43 distortion of the support frame in the execution mode 1.Other parts and the execution mode 1 of the circuit-breaker that execution mode 9 is related constitute in the same manner.

The pair of side plates 422,423 of handle arm 42E has handle arm body portion AB and the RC5 of center of rotation portion separately, and the RC5 of center of rotation portion is in the end of handle arm body portion AB, and is continuous and integrally formed with handle arm body portion AB with handle arm body portion AB.Handle arm body portion AB forms the major part of side plate 422,423, and its thickness of slab is t0.This handle arm body portion AB has inner surface s11 and outer surface s21, and these inner surfaces s11 and outer surface s21 are parallel to each other.The inner surface s11 of each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42E across interval D toward each other.

The RC5 of center of rotation portion is the part as the center of rotation of handle arm 42E, and the pair of frames plate 431,432 of the supported framework 43E of the RC5 of this center of rotation portion supports rotationally.The RC5 of this center of rotation portion is a concave shape in execution mode 9, has the circular-arc plane of rotation CR of concave shape.This circular-arc plane of rotation CR forms from the plane of the outer surface s21 that comprises handle arm body portion AB and begins to have width B.This width B is represented with B=t0-A.

On the RC5 of center of rotation portion, be adjacent and form thin-walled TW4.This thin-walled TW4 and handle arm body portion AB are continuous and integrally formed with this handle arm body portion AB, to pair of frames plate 431,432 prolongations of support frame 43E.This thin-walled TW4 has thickness A.Thin-walled TW4 has inner surface s32 and outer surface s42, and these inner surfaces s32 and outer surface s42 are parallel to each other.The inner surface s32 of thin-walled TW4 is positioned on the plane identical with the inner surface s11 of handle arm body portion AB.As can be known clear and definite from Figure 18 (c), thin-walled TW4 covers the inner surface side of circular-arc plane of rotation CR.

In execution mode 9, RC5 of center of rotation portion and thin-walled TW4 are formed in the scope of thickness of slab t0 of handle arm body portion AB, do not protrude to its outside from the scope of the thickness of slab t0 of this handle arm body portion AB.

The pair of frames plate 431,432 of support frame 43E has framework body portion FB and the RS5 of rotational support portion separately.The RS5 of rotational support portion of support frame 43E is integrally formed therewith in the end of framework body portion FB.This framework body portion FB forms the major part of pair of frames plate 431,432, and thickness of slab is t0.This thickness of slab t0 equates with the thickness of the handle arm body portion AB of the pair of side plates 422,423 of handle arm 42E.The framework body portion FB of the pair of frames plate 431,432 of support frame 43E has inner surface s31 and outer surface s41, and these inner surfaces s31 and outer surface s41 are parallel to each other.The inner surface s31 of each framework body portion FB of pair of frames plate 431,432 across interval D toward each other.Interval between the inner surface s11 of this interval D and each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42E equates.

Be formed at the RS5 of rotational support portion on the pair of frames plate 431,432 of support frame 43E, support the RC5 of center of rotation portion on the pair of side plates 422,423 that is formed at handle arm 42E rotationally.The RS5 of rotational support portion forms in execution mode 9 and protrudes shape, has the circular-arc supporting surface CS that protrudes shape.The circular-arc plane of rotation CR of the diameter of this circular-arc supporting surface CS and the pairing center of rotation RC5 of portion about equally.These circular-arc plane of rotation CR and circular-arc supporting surface CS contact with each other on the fulcrum P of Fig. 2～shown in Figure 7, and handle arm 42E is that rotate at the center with this fulcrum P.

Be formed at the outer surface s42 of the thin-walled TW4 on the pair of side plates 422,423 of handle arm 42E, under the circular-arc plane of rotation CR state of contact of the RC5 of center of rotation portion of the circular-arc supporting surface CS of the RS5 of rotational support portion and handle arm 42E, contact with the inner surface s51 of the RS5 of rotational support portion, prevent handle arm 42E to the left and right directions of Figure 18 (a), be the extending direction skew of cross bar 30.Under the circular-arc plane of rotation CR state of contact of the RC5 of center of rotation portion of the circular-arc supporting surface CS of the RS5 of rotational support portion and handle arm 42E, the inner surface S32 of thin-walled TW4 is positioned on the plane of inner surface s31 of framework body portion FB of the pair of frames plate 431,432 that comprises support frame 43E.

In execution mode 9, in the scope of the thickness of slab t0 of each handle arm body portion AB of the pair of side plates 422,423 of handle arm 42E, form center of rotation RC5 of portion and thin-walled TW4, in addition, in the scope of the thickness of slab t0 of the pair of frames plate 431,432 of support frame 43E, form the rotational support RS5 of portion, its result, the RC5 of center of rotation portion, thin-walled TW4 and the RS5 of rotational support portion all are positioned at the scope of thickness of slab t0, do not protrude to the outside from the scope of this thickness of slab t0.Therefore, the RC5 of these center of rotation portions, thin-walled TW4 and the RS5 of rotational support portion can not exceed the required width of handle arm 42E or support frame 43E and protrude laterally, handle arm 42E and support frame 43E can be limited in the required width, can reduce the width dimensions of circuit-breaker, realize the miniaturization of circuit-breaker.

In addition, in execution mode 9, because the RC5 of center of rotation portion; thin-walled TW4; and the RS5 of rotational support portion can not exceed the required width of handle arm 42E or support frame 43E and protrudes laterally; so when guaranteeing the phase insulation of the movable contact 23 that cross bar 30 is kept; the RC5 of center of rotation portion; thin-walled TW4; and the RS5 of rotational support portion can not make insulating properties reduce; can guarantee opening performance; and; because thin-walled TW4 is also integrally formed with the handle arm body portion AB of handle arm 42E;, assembly cost is suppressed for lower so can realize the minimizing of component costs.And, owing to thin-walled TW4 is formed on the handle arm 42E, so when thin-walled TW4 deforms or damages, can easily change with handle arm 42E.

Execution mode 10

Figure 19 is the handle arm in the execution mode 10 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 19 (a) is the front view of the handle arm of the related circuit-breaker of expression execution mode 10, and Figure 19 (b) is the face side profile of the support frame of the related circuit-breaker of expression execution mode 10.

In present embodiment 10, make the circular-arc plane of rotation CR that is formed on the handle arm 42 in the execution mode 1 change to circular-arc rotation inclined plane CR1, in addition, make the circular-arc supporting surface CS that is formed on the support frame 43 in the execution mode 1 change to circular-arc support inclined plane CS1.Other parts of the handle arm 42 of present embodiment 10 and execution mode 1 constitute in the same manner, and in addition, the support frame 43 and the execution mode 1 of execution mode 10 constitute in the same manner.In addition, other parts and the execution mode 1 of the related circuit-breaker of execution mode 10 constitute in the same manner.

In execution mode 10, circular-arc rotation inclined plane CR1 is in the diameter of the outer surface s22 side of the RC of the center of rotation portion big mode of diameter than its inner surface s12 side, is formed obliquely along the extending direction of cross bar 30.The inclination of circular-arc support inclined plane CS1 and circular-arc rotation inclined plane CR1 in the diameter of the outer surface s41 side of the RS of the rotational support portion big mode of diameter than its inner surface s31 side, is formed obliquely along the extending direction of cross bar 30 accordingly.

Handle arm 42 is by the direction pretension of main spring 48 to support frame 43, the pretightning force of the direction of this support frame 43, on the contact-making surface between circular-arc rotation inclined plane CR1 and the circular-arc support inclined plane CS1, produce the component that the RC of center of rotation portion is moved laterally.Based on this component, the outer surface s22 of the RC of center of rotation portion is pushed to the inner surface s32 of thin-walled TW, prevent that handle arm 42 from coming off.

As noted above, in execution mode 10, can obtain the effect identical with execution mode 1, and, by circular-arc rotation inclined plane CR1 and circular-arc support inclined plane CS1 the RC of center of rotation portion is pushed to thin-walled TW, can prevent that handle arm 42 from coming off.

Execution mode 11

Figure 20 is the handle arm in the execution mode 11 of expression circuit-breaker involved in the present invention and the exploded view of support frame, Figure 20 (a) is the front view of the handle arm of the related circuit-breaker of expression execution mode 10, and Figure 20 (b) is the face side profile of the support frame of the related circuit-breaker of expression execution mode 10.

In present embodiment 11, make the circular-arc plane of rotation CR that is formed on the handle arm 42 in the execution mode 2 change to circular-arc rotation inclined plane CR1, in addition, make the circular-arc supporting surface CS that is formed on the support frame 43 in the execution mode 2 change to circular-arc support inclined plane CS1.Other parts of the handle arm 42 of present embodiment 11 and execution mode 2 constitute in the same manner, and in addition, the support frame 43 of execution mode 11 also constitutes in the same manner with execution mode 2.In addition, other parts and the execution mode 2 of the related circuit-breaker of execution mode 11 constitute in the same manner.

In execution mode 11, circular-arc rotation inclined plane CR1 is in the diameter of the outer surface s22 side of the RC of the center of rotation portion big mode of diameter than its inner surface s12 side, is formed obliquely along the extending direction of cross bar 30.The inclination of circular-arc support inclined plane CS1 and circular-arc rotation inclined plane CR1 in the diameter of the outer surface s41 side of the RS of the rotational support portion big mode of diameter than its inner surface s31 side, is formed obliquely along the extending direction of cross bar 30 accordingly.

Handle arm 42 is by the direction pretension of main spring 48 to support frame 43, the pretightning force of the direction of this support frame 43, on the contact-making surface between circular-arc rotation inclined plane CR1 and the circular-arc support inclined plane CS1, produce the component that the RC of center of rotation portion is moved laterally.Based on this component, the outer surface s22 of the RC of center of rotation portion is pushed to the inner surface s32 of thin-walled TW, prevent that handle arm 42 from coming off.

As noted above, in execution mode 11, can obtain the effect identical with execution mode 2, and, by circular-arc rotation inclined plane CR1 and circular-arc support inclined plane CS1 the RC of center of rotation portion is pushed to thin-walled TW, can prevent that handle arm 42 from coming off.

In addition, also can replace circular-arc plane of rotation CR and circular-arc supporting surface CS in the execution mode 3～9, and use circular-arc rotation inclined plane CR1 and circular-arc support inclined plane CS1 in execution mode 10 and the execution mode 11.

Industrial applicibility

Circuit-breaker involved in the present invention can be used as distribution with breaker or RCCB etc.

Claims (7)

1. circuit-breaker, it has:

Fixed contact, it is configured on the insulation base station;

Movable contact, it has the moving contact that contacts/separate with described fixed contact;

Cross bar, it rotatably is configured on the described insulation base station, keeps described movable contact;

Handle arm, it is installed on the manually operated handle;

Support frame, it is fixed on the described insulation base station, and the rotatable earth's axis supports described handle arm;

Dwang, it engages with the chain shot of tripgear, rotates when tripping operation;

Lower link, it drives described cross bar;

Last connecting rod, its axle is supported on the described dwang, combines with described lower link and constitutes toggle link via spring catch; And

Main spring, its driving side and described handle arm link, and slave end combines with described spring catch,

This circuit-breaker is characterised in that,

Described handle arm is made of metallic plate, has the center of rotation portion integrally formed with the handle arm body portion in its end,

In addition, described support frame is made of metallic plate, has rotational support portion integrally formed with the framework body portion and that contact with the center of rotation portion of described handle arm in its end,

On in described handle arm body portion and described framework body portion any one, the thin-walled of integrally formed and described center of rotation portion or described rotational support portion adjacency, this thin-walled forms, its inner surface or outer surface are on the plane of the outer surface that comprises described handle arm body portion or described framework body portion and comprise between the plane of inner surface of described handle arm body portion or described framework body portion, prevent the extending direction skew of the center of rotation portion of described handle arm along described cross bar.

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

The center of rotation portion of described handle arm has the circular-arc plane of rotation that protrudes shape, the rotational support portion of described support frame has the circular-arc supporting surface of concave shape, described thin-walled and described circular-arc supporting surface in abutting connection with and integrally formed with described framework body portion.

3. circuit-breaker according to claim 1 is characterized in that,

The center of rotation portion of described handle arm has the circular-arc plane of rotation of concave shape, the rotational support portion of described support frame has the circular-arc supporting surface that protrudes shape, and described thin-walled is integrally formed with described framework body portion with described circular-arc supporting surface adjacency.

4. circuit-breaker according to claim 1 is characterized in that,

The center of rotation portion of described handle arm has the circular-arc plane of rotation that protrudes shape, the rotational support portion of described support frame has the circular-arc supporting surface of concave shape, described thin-walled and described circular-arc plane of rotation in abutting connection with and integrally formed with described handle arm body portion.

5. circuit-breaker according to claim 1 is characterized in that,

The center of rotation portion of described handle arm has the circular-arc plane of rotation of concave shape, the rotational support portion of described support frame has the circular-arc supporting surface that protrudes shape, and described thin-walled is integrally formed with described handle arm body portion with described circular-arc plane of rotation adjacency.

6. according to each described circuit-breaker in the claim 2 to 5, it is characterized in that,

The diameter of described circular-arc plane of rotation and described circular-arc supporting surface about equally.

7. according to each described circuit-breaker in the claim 2 to 5, it is characterized in that,

Described circular-arc plane of rotation and described circular-arc supporting surface are formed obliquely along the extending direction of described cross bar.

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