CN100536058C - Breaker - Google Patents
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- CN100536058C CN100536058C CNB2004100492892A CN200410049289A CN100536058C CN 100536058 C CN100536058 C CN 100536058C CN B2004100492892 A CNB2004100492892 A CN B2004100492892A CN 200410049289 A CN200410049289 A CN 200410049289A CN 100536058 C CN100536058 C CN 100536058C
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Abstract
This invention provided a miniaturized circuit breaker capable of improving an operation and the like of a switching mechanism part when a fixed contact is welded to a moving contact or in tripping. This circuit breaker is so structured that an on-state is obtained with a lower link 15 and an upper link 14 folded so as to position the other end of the lower link 15 in the middle part between one end and the other end of the upper link 14. The circuit breaker is so structured that, when the fixed contact 21a is welded to the moving contact 22a, a handle 12 is engaged with a forcible engagement part 13d of a connection link 13 to prevent the handle 12 from rotating to the off-position; an opening projection 16d is formed on a lever 16; a projecting contact part 13f in contact with the opening projection 16d is formed on the connection link 13; and the opening projection 16d comes into contact with the projecting contact part 13f of the connection link 13 in tripping start to assist the startup of the connection link 13.
Description
Technical field
The present invention relates to the circuit breaker of Inturruptor for sub-line or residual current circuit breaker etc., is for the miniaturization of open-close mechanism section or slimming etc. in detail, and novel mechanism is provided.
Background technology
In the open-close mechanism section that shifts to an earlier date the conducting early cut-off of circuit breaker,, use the upset linkage that when opening, makes connecting rod and lower link be almost straight line and constitute in order to ensure the contact pressure of contact with folding obforms handle in the past.(for example, with reference to patent documentation 1).
In addition, as special example, do not adopted the upset linkage by being well known that and guarantee contact pressure, separately the time, use the structure of secondary spring by contact spring.(for example, with reference to patent documentation 2).
[patent documentation 1] No. 3166908 communique of patent (Fig. 6)
[patent documentation 2] spy opens 2001-250465 communique (Fig. 3)
In circuit breaker in the past, general, in the upset linkage that in open-close mechanism section, uses, the formation that connecting rod and lower link are extended on the cardinal principle straight line.According to this formation, in casing, need be used to make the space of connecting rod and lower link elongation, thereby increase the overall dimension of casing.In addition, as the folding circuit breaker of going up connecting rod and lower link and constituting, the invention before the application's the applicant is arranged, under the situation deposited to fixed contact and moving contact, or the action of the open-close mechanism section during tripping operation etc., having needs the problem points improved.
The present invention is exactly that first purpose is in open-close mechanism section in order to solve problem as described above, obtains having the circuit breaker of seeking the miniaturization formation.In addition, second purpose is that one side is sought miniaturization, and one side obtains the smooth-going circuit breaker of operation of handle.Have, the 3rd purpose is to seek under the situation deposited to fixed contact and moving contact again, or the improvement of the action of the open-close mechanism section during tripping operation etc.
Summary of the invention
In relevant circuit breaker of the present invention, mainly be on open-close mechanism section, to have feature, promptly a kind of circuit breaker, have: latch, the one end earth's axis free to rotate of this latch is supported on the framework, and the other end engages with trip(ping) bar simultaneously, this trip(ping) bar and the interlock of excessive current disconnecting apparatus; Bar, the end earth's axis free to rotate of this bar is supported on the framework, and the common fastening of the other end is on latch simultaneously; Last connecting rod, end of connecting rod is attached on the other end of above-mentioned bar free to rotately on this, and the other end is provided with the downside spring catch simultaneously; Lower link, an end of this lower link links with last connecting rod by the downside spring catch free to rotately; Connect connecting rod, the end earth's axis free to rotate of this connection connecting rod is supported on the framework, and the other end links with the pressing plate that makes the movable connection action simultaneously, and links the other end that lower link is arranged at pars intermedia free to rotately; Handle, this handle is arranged on the upper end side of framework free to rotately; Sliding tray, this sliding tray forms on framework near the position of handle; The upside spring catch, this upside spring catch fastening handle by the rotation of handle, slides in sliding tray; Main spring, this main spring are suspended between above-mentioned upside spring catch and the downside spring catch, and it constitutes, and at folding lower link and last connecting rod, the other end of lower link is positioned under the state of centre of the end of connecting rod and the other end, can obtain opening.
In addition, when fixed contact and moving contact are deposited, handle and be connected the pressure holding section engaging of connecting rod, handle can not turn to off-position.
Have again, on bar, be provided with and open utmost point projection, open the projection contact site that the utmost point projection contact connecting to be provided with on the connecting rod, constitute when the tripping operation starting, open utmost point projection and contact, assist the starting of connection connecting rod with the projection contact site that is connected connecting rod with above-mentioned.
The effect of invention
The present invention is at open-close mechanism section, at folding lower link and last connecting rod the other end of lower link is positioned under the state of centre of the end of connecting rod and the other end, can obtain opening, by such formation, makes the easy miniaturization of circuit breaker.
In addition, when fixed contact and moving contact are deposited, can suppress expansion because of the deposited accident that causes.
Have again, because of the excessive current tripping operation time,, can make movable connection separately as soon as possible by the auxiliary starting that connects connecting rod.
Description of drawings
Fig. 1 is the front view of the circuit breaker of expression embodiments of the present invention.
Fig. 2 is the stereogram of expression as the switching connector portions at main position of the present invention.
Fig. 3 is the stereogram of the outward appearance of representational framework.
Fig. 4 is the part drawing of the thin portion of representational framework.
Fig. 5 is the part drawing of the thin portion of expression handle.
Fig. 6 is the part drawing that expression connects the thin portion of connecting rod.
Fig. 7 is the part drawing that the thin portion of connecting rod is gone up in expression.
Fig. 8 is the part drawing of the thin portion of expression lower link.
Fig. 9 is the part drawing of the thin portion of indication rod.
Figure 10 is the part drawing of the thin portion of expression latch.
Figure 11 is the part drawing of the thin portion of expression trip(ping) bar.
Figure 12 is the explanation end view that opens and closes connector portions.
Figure 13 is the explanation pie graph that expression opens and closes the opening of connector portions.
Figure 14 is the explanation pie graph that expression opens and closes the closed condition of connector portions.
Figure 15 is the explanation pie graph of other parts of the expression opening that opens and closes connector portions.
Figure 16 is the explanation pie graph of other parts of the expression closed condition that opens and closes connector portions.
Figure 17 is the explanation pie graph that expression opens and closes the tripped condition of connector portions.
Figure 18 is the key diagram of thin portion of the sliding tray of representational framework.
Figure 19 is the key diagram of thin portion of the connecting hole of expression handle.
Figure 20 is the explanation pie graph of execution mode 4 and 5.
Figure 21 uses in the pie graph in the explanation of execution mode 6, the expression opening.
Figure 22 uses in the pie graph in the explanation of execution mode 6, the expression tripped condition.
Embodiment
Execution mode 1
Fig. 1 and Fig. 2 are illustrated in the circuit breaker 100 that is used for implementing embodiments of the present invention 1, and Fig. 1 is the front view of the integral body of expression circuit breaker, and Fig. 2 amplifies the stereogram of expression as the open-close mechanism section at main position of the present invention.In addition, Fig. 1 is as the accompanying drawing of circuit breaker, normally describe as end view, in the present embodiment, from other the relation of accompanying drawing, the drawing of Fig. 1 is described as front view.
In Fig. 1, base 1 and the casing that covers 2 formation circuit breakers are formed by the synthetic resin material.Open-close mechanism section 3 is provided in the inside of casing, and handle 12 described later is projected into the surface of cover 2 from covering 2 handle with fenestra 2a.Opening and closing connector portions 4 generally is to constitute by being known as bridge circuit formula two contact point mode.When excessive current disconnecting apparatus 5 flows by the power supply side terminal 6 that is connected with circuit (do not have diagram) and load side terminal 7 in excessive current, open-close mechanism section 3 is moved, these all are known formations.In addition, also be provided with tripper or terminal screw etc., but because of it doesn't matter with the present invention, so omit accompanying drawing.
In Fig. 2, open-close mechanism section 3 is with by connecting connecting rod 13 and going up the linkage of connecting rod 14 etc. or handle 12 that Handle axis 31 supports etc. is clamped between 2 frameworks 11.Main spring 19 is suspended in the upside spring catch 32 by handle 12 action, and is attached between the downside spring catch 35 on the linkage, and connector portions 4 is flexible when carrying out on-off action opening and closing.That is, this stretching motion rotates linkage, with respect to linkage, makes the direction counter-rotating of effect, thereby carries out on-off action.Pressing plate 20 links with linkage, make at one end go up the movable connection 22 that is provided with respect to permanent joint (not having diagram) carry out near away from.The 18th, known trip(ping) bar, as described later, by 5 actions of excessive current disconnecting apparatus.
Then, with regard to the formation of above-mentioned open-close mechanism section 3,, the detailed of its constituent part is described according to Fig. 3 to Fig. 7.Fig. 3 is the stereogram of framework 11, and Fig. 4 (a) is front view, (b) is end view.The steel plate of this framework 11 used thickness 1mm is that the pair of frames plate 111 and 112 that almost forms is symmetrically combined in the face of ground mutually.If the summary of its size of expression, for example, as the circuit breaker usefulness of 100 amperes of frameworks, then forming size H is 44mm, and size W is 23mm, and size T is 6mm.In addition, in Fig. 3 and Fig. 4, framework 11 expression be article (article that do not have the part of linkage etc. in inside) behind combo box frame plate 111 and 112, this framework 11 is when constituting switching connector portions 4, be to be clamped between frame plate 111 and 112, frame plate 111 and 112 is made up from both sides with handle described later, linkage and axle class etc.
In addition, as described below in the drawings, various through holes or guide plate etc. are arranged, relevant part is aftermentioned respectively.That is, 12 on handle is supported among the through hole 11a.Upside spring catch 32 can be inlaid among the circular-arc sliding tray 11b slidably.Connecting 13 on connecting rod is supported among the through hole 11c.17 of latches are supported among the through hole 11d.16 on bar is supported among the through hole 11f.18 of trip(ping) bars are supported among the through hole 11g.Connect the part of the ora terminalis of the motion space of the downside spring catch 35 among the window 11h and motion space, be used for the fastening portion of downside spring catch 35.Guide plate 11k is provided with for the displacement that suppresses to be configured near the part the middle position between frame plate 111 and 112.11m is a screwed hole, is used for switching connector portions 4 is screwed to base 2.
Fig. 5 is the handle 12 that is formed by for example synthetic resin material, (a) is front view, (b) is end view, (c) is rearview.In the drawings, 12a is a connecting hole, is embedded with upside spring catch 32 described later.But, because upside spring catch 32 is driven in the circular-arc sliding tray 11b that forms on framework 11, so if observe from handle 12 sides, then move at above-below direction the position of upside spring catch 32.Therefore, connecting hole 12a or form the slotted hole that extend to be provided with at support holes 12b locality, or slotted hole is prolonged becomes the open slot with peristome at the ora terminalis of handle 12.12c is an engaging protrusion, is in the contact when deposited, with the part that is connected connecting rod 13 engagings described later.
Fig. 6 is the connection connecting rod 13 that is formed by for example steel plate, (a) is front view, (b) is vertical view.In the drawings, through hole 13a is the hole that is used for being bearing on the through hole 11c of framework 11 free to rotately.Through hole 13b is with before framework 11 clampings, is used for free to rotately the hole that links with lower link 15 described later.Through hole 13c is the hole that is used to link pressing plate 20 described later.13f is the projection contact site of opening utmost point projection 16d contact that is provided with on bar 16 described later.13e is a flex point, and 13h is a contact fastening portion.In addition, 13d is in the contact when deposited, the pressure holding section of the engaging protrusion 12c of handle engaging, and 13e forces the rotation section.
Fig. 7 is the last connecting rod 14 that is formed by for example steel plate, (a) is front view, (b) is upward view.In the drawings, through hole 14a is the hole that is used to install downside spring catch 35 described later.Through hole 14b is with before framework 11 clampings, is used for free to rotately the hole that links with bar 16 described later.14c is a U type bend, and through hole 14a connects U type bend 14c and forms.
Fig. 8 is the lower link 15 that is formed by for example steel plate, (a) is front view, (b) is upward view.In the drawings, through hole 15a is as described above, with before framework 11 clampings, is used for free to rotately and the hole that is connected connecting rod 13 bindings.Through hole 15b is with framework 11 clampings the time, by downside spring catch 35, is used for the hole that links with last connecting rod 14.
Fig. 9 is the bar 16 that is formed by for example steel plate, (a) is front view, (b) is end view.In the drawings, through hole 16a is with before framework 11 clampings, is used for free to rotately the hole with above-mentioned last connecting rod 14 bindings.Through hole 16b is the hole that is used for being bearing in the through hole 11f of framework 11 free to rotately.In addition, fastening projection 16c form can with the rotation fastening 17c of the portion fastening of latch 17 described later.16d is out utmost point projection, is set to can contact with the pressure holding section 13d that is connected connecting rod 13 when tripping operation.
Figure 10 is the latch 17 that is formed by for example steel plate, (a) is front view, (b) is end view.In the drawings, 17a is the hole that is used for being bearing in the through hole 11d of framework 11 free to rotately.17b is the tripping operation fastening portion of fastening on trip(ping) bar 18 described later.17c is the rotation fastening portion that is used for the rotation of fastening bar 16.
Above-mentioned connection connecting rod 13, to go up connecting rod 14, lower link 15, bar 16, latch 17 be respectively that steel plate by thickness 1mm forms.Like this, with handle 12 together by framework 11 clampings.This clamping is will be by above-mentioned connection connecting rod 13, go up 5 parts that connecting rod 14, lower link 15, bar 16, latch 17 constitute must be clamped in the space of 6mm of framework 11, can rotate respectively.
In this case, in order to reduce to open and close the width dimensions of connector portions 4, insert 5 above-mentioned parts with tight contact condition.That is, the space of framework 11 is set at, if the part of same thickness then can't insert 6 size.Therefore, with its a part of warpage, adjacent part is not disturbed mutually.
Figure 11 is the trip(ping) bar 18 that is formed by the synthetic resin material, is the front view of seeing from the linkage side (a), cuts a part open and represents.(b) be cutaway view along the K-K line.In the drawings, 18a is the through hole that is used for being bearing on the framework 11 free to rotately.18 (b) are latch fastening portions.
Then, describe with regard to the state after above-mentioned each part is assembled as open-close mechanism section.But, if gather the whole parts of diagram, then because be difficult to judge the shape of each part, with the relation of other parts etc., so accompanying drawing (diagram) is divided into the state or the closing state of unlatching, only illustrate the part relevant with its state, other part omits diagram and describes.In this case, because in the explanation, exist the diagram of the context relation of dotted line (solid line with) of part and the different part of relation of Figure 12.
In addition, Figure 12 is the end view of open-close mechanism section 3, and expression will connect connecting rod 13, upward connecting rod 14, lower link 15, bar 16, latch 17 these 5 links are inserted between frame plate 111 and 112 with tight contact condition.In addition, be illustrated in two outsides of said frame 11, main spring 19 is suspended between upside spring catch 32 and the downside spring catch 35.
At first, Figure 13 represents the state of permanent joint 21 and movable connection 22 closures, that is, and and the state of unlatching.In addition, 21a is a fixed contact, and 22a is a moving contact.Under this state, it is the center that handle 12 is positioned at Handle axis 31, and the position to arrow RA direction is rotated makes the upside spring catch 32 on the connecting hole 12a that is fastened on handle 12, near the left side that forms the circular-arc sliding tray 11b of framework 11.In addition, smooth-going in order to make with respect to the motion of sliding tray 11b, roller 32a is set on upside spring catch 32.Because on this roller 32a, be applied with the powerful power that produces by main spring 19, so wish it is the metal roller of considering durability.Connect connecting rod 13 by the link supporting axle 33 on the through hole 11c that is arranged on framework 11, support free to rotately.One end of lower link 15 is by connecting rod connection shaft 34, link with respect to connecting connecting rod 13 free to rotately, the other end of lower link 15 is by downside spring catch 35, link with respect to last connecting rod 14, this downside spring catch 35 is set in place on the through hole 14a on the U of the last connecting rod 14 type joggling part 14c free to rotately.The upper end side of last connecting rod 14 is by bar connection shaft 36, links with the upper end side of bar 16 described later free to rotately.Above-mentioned bar connection shaft 36 carries out closing from being opened to above-mentioned handle 12 by manually, or when being closed to the operation of unlatching, because the snap-fit relationship of the part with other described later, often is maintained at the position (position shown in Figure 13) of regulation.
As described above, circuit breaker of the present invention as shown in figure 13, owing to be at folding above-mentioned lower link 15 and last connecting rod 14, the other end of lower link 15 is positioned under the state in centre position of an above-mentioned end of going up connecting rod 14 and the other end, can obtain opening and constitute, so that the miniaturization of circuit breaker becomes easy.
Then, just the operation from the opening of above-mentioned Figure 13 to the closed condition of Figure 14 describes.This shutoff operation is undertaken by making handle 12 swing to left side (rotating to arrow LA direction).That is, if handle 12 rotates to the left, then as shown in figure 14, upside spring catch 32 is subjected to the guiding of the sliding tray 11b of framework 11, moves to the right.In the process that this moves, be suspended in the position of the main spring 19 between upside spring catch 32 and the downside spring catch 35 if surpass the position of bar connection shaft 36, then main spring 19 is with respect to the action direction counter-rotating of last connecting rod 14.By this counter-rotating, applying with bar connection shaft 36 to last connecting rod 14 is the center, to the elastic force pressure of arrow LB direction rotation.If last connecting rod 14 rotates to arrow LB direction,, also apply elastic force pressure to connecting connecting rod 13 then by lower link 15.By this elastic force pressure, connecting connecting rod 13 is the center with link supporting axle 33, rotates to arrow LC direction.Therefore, by the pressing plate 20 that links with the front end that is connected connecting rod 13, movable connection 22 leaves from permanent joint 21, becomes closed condition as shown in figure 14.Undertaken by making handle 12 swing to (rotation) right side from the operation that is closed to opening, but the rotation of the counter-rotating of the action direction of the main spring 19 of this moment and last connecting rod 14 etc. owing to be above-mentioned opposite direction only, is omitted explanation.
Above-mentioned explanation with handle 12 is closed or when being closed to the operation of unlatching, bar connection shaft 36 often is maintained at the position (position shown in Figure 13) of regulation from being opened to.For this formation, one side is with reference to Figure 15, and one side illustrates the relation in opening.In order to carry out this maintenance, has by being arranged on the bar bolster 38 on the framework 11 bar 16 that supports and by latch bolster 39, the latch 17 that supports free to rotately free to rotately.The upper end side of bar 16 is by bar connection shaft 36, with the upper end side binding of last connecting rod 14.Therefore, in the state of Figure 15, by the main spring 19 that is suspended on the downside spring catch 35, by last connecting rod 14, bar 16 is suppressed, making it is the center with bar bolster 38, rotates to arrow LD direction.
With the state that bar 16 suppresses to arrow LD direction, as described below, by latch 17 by fastening.That is, latch 17 is bearing on the framework 11 by latch bolster 39 free to rotately, but usually, suppresses by the torque spring 23 that is arranged on the weak power on the latch bolster 39, and it is rotated to arrow LE direction.On this latch 17, shown in the part drawing of Figure 10, having by warpage is the rotation fastening 17c of portion that U word shape forms, as shown in figure 15, rotate the fastening 17c of portion with respect to this, the fastening projection 16c engaging that on bar 16, forms, fastening bar 16 is to the rotation of arrow LD direction.In addition, because this engaging is the engaging of being undertaken by the brute force of main spring 19,,, bear the elastic force pressure that latch 17 is rotated to arrow RD direction by the rotatory force of bar 16 so can offset the elastic force pressure (rotatory force of arrow LE direction) of torque spring 23.At this moment, by known trip(ping) bar 18, fastening latch 17 no longer rotates it.Because be formation as described above, so bar connection shaft 36 often is maintained at the position (position shown in Figure 13) of regulation.
For this maintenance, simultaneously with reference to Figure 16, the relation in the one side explanation in off position.In this case, by the operation of handle 12, last connecting rod 14 is the center with bar connection shaft 36, rotates to arrow LB direction.But, identical with the state of opening, by the main spring 19 that is suspended on the downside spring catch 35,, suppress bar 16 by last connecting rod 14, making it is the center with bar bolster 38, rotates to arrow LD direction.Therefore, identical with opening, bar connection shaft 36 is maintained at the position (position shown in Figure 12) of regulation usually.Can understand from above-mentioned, when open and close, this bar connection shaft 36 becomes the center, the action of carrying out the counter-rotating of main spring 19 and going up connecting rod 14 etc.
Disconnection action (tripping operation) when then, the excessive current that surpasses setting being flow through describes.When excessive current flow through, as known in the art, the action of excessive current disconnecting apparatus shown in the arrow LH of Figure 15, rotated trip(ping) bar 18.That is, when the opening of Figure 15, the relation of trip(ping) bar 18 and latch 17 and bar 16 etc. is such as shown in the figure.Under this state,, then throw off with the latch 17 of trip(ping) bar 18 fastenings if trip(ping) bar 18 rotates to arrow LH direction.Before be about to throwing off, latch 17 as mentioned above, to being that the rotation fastening 17c of portion that U word shape forms applies elastic force pressure by warpage, this elastic force pressure makes the fastening projection 16c engaging of bar 16, rotates to clockwise direction (arrow RD direction).Therefore, latch 17 rotates to arrow RD direction as shown in figure 17, and bar 16 disengagements engage with latch 17, by the elastic force pressure of main spring 19, rotate to arrow LD direction, stop at the position of Figure 17.This stops is bar 16 by being arranged on stopping that block 11n on the framework 11 carries out.When this bar 16 stopped, handle 12 engaged with the leading section of bar 16, and as shown in the figure, handle 12 stops at the centre position of opening and closing.Thereafter, by the elastic force pressure of torque spring (not having diagram), trip(ping) bar 18 is got back to the home position.In addition, be used for turning back to the setting operation again of common state from tripped condition, identical with in the past circuit breaker, by being rotated to closing direction, handle 12 undertaken, because action and the of the present invention purport relevant with these do not have direct relation, so omit explanation.
According to above-mentioned such circuit breaker that constitutes,, make the correspondence that is applied to when having auxiliary equipment or residual current circuit breaker etc. become easy by the miniaturization of open-close mechanism section 3.In addition,, or diminish, also diminish with fenestra 2a so cover 2 handle from being closed to the actuating range of opening when rotating because handle 12 closes from being opened to.This makes the demonstration at the various marks of the front of cover 2 or nameplate etc. become easy.
In addition, in the above-described embodiment, on framework 11, form sliding tray 11b, make main spring 19 suspensions simultaneously between upside spring catch 32 that in sliding tray 11b, slides and downside spring catch 35, by by handle 12, upside spring catch 32 is slided, thereby connecting rod 14 being rotated, make movable connection 22 engage, separate with permanent joint 21, for example also can be, shown in No. 3166908 communique of patent (Fig. 6), directly drive main spring 19 by handle 12.In addition, only be not applicable to according to open-close mechanism section 3 of the present invention and go for the switching connector portions 4 of bridge circuit formula 2 contact point mode on the switching connector portions of general fashion yet.
Execution mode 2
In above-mentioned formation, the circular-arc sliding tray 11b that on framework 11, forms, be along with handle 12 from being opened to the rotation of closing, and become circular-arc that direction to main spring 19 elongations tilts.This is for when not having operating grip, or in the way of operation, when hand left, generation made handle turn back to the original unlatching or the elastic force pressure of off-position.In this case, the circular-arc of sliding tray 11b can be simple circular arc, if as shown in Figure 18 special circular-arc, the then action that can more be wished.Promptly, in sliding tray 11b, the circular arc S of downside as shown in the figure, be by 2 kinds of radius size R-1 and R-2 form circular-arc, these 2 kinds of radius size R-1 and R-2 are flex point with the roughly centre position of sliding tray 11b, with center of radius as near the position that mutually surpasses above-mentioned flex point downside spring catch 35.That is, be flex point with the centre position, be ヘ word shape roughly.In addition, because upside circular arc U does not contact upside spring catch 32, so can not be the circular arc of considering through special yet.
The elastic force pressure of the handle when making handle 12 stopping operating from be opened to the rotation way of closing by forming above-mentioned such sliding tray 11b, can being increased in makes handle 12 be returned to original enable possition conscientiously.Even, from the rotation way that is closed to unlatching, stop operating at handle 12, also can make handle 12 be returned to original off-position conscientiously.
In addition, in above-mentioned formation, the connecting hole 12a that handle 12 has been described is slotted hole or open slot.But, under this connecting hole 12a is the simple slotted hole or the situation of simple open slot, turn to when closing from unlatching at handle 12, the power of upside spring catch 32 to the circular-arc sliding tray 11b pushing of framework 11 is increased, be difficult to obtain the smooth-going rotation of handle 12.Therefore, become the connecting hole 12a of the such shape of Figure 19.That is, be at handle 12 under the state of unlatching, connecting hole 12a becomes the shape that includes the 12c of pushing portion, and the 12c of this pushing portion pushes upside spring catch 32 along the direction of the shape of sliding tray 11b.In the present embodiment, for example, as shown in figure 19, on connecting hole 12a, press direction is set at from the line with respect to the right angle orientation of the center line that links handle 12 and upside spring catch 32, about 27 degree make progress.
The above-mentioned angle that makes progress is tried to achieve by calculated value or experiment, under situation greater than above-mentioned 27 angles of spending, power to sliding tray 11b pushing reduces, owing to need to increase connecting hole 12a, so being the gap of existence and upside spring catch 32, the result increases the problem that opening and closing operations can't be carried out smooth-goingly.In above-mentioned formation according to the present invention, this angle is that 27 degree are the most appropriate.
In addition, when handle 12 is opened rotation from being closed to, can set the pushing 12c of portion based on same consideration.The 12c of pushing portion by connecting hole 12a as described above makes the action of upside spring catch 32 smooth-going, and it is easy that the operation of handle 12 becomes.
Execution mode 4
In the above-described configuration, produce at circuit breaker under the situation of abnormality, under the state of permanent joint 21 and movable connection 22 closures, have deposited situation.Under this state, if handle 12 rotates to closing direction (arrow LA direction), then handle 12 is closed condition as shown in Figure 14, and permanent joint 21 and movable connection 22 are closure state, that is, fixed contact 21a and moving contact 22a are deposited state.Because this state is relatively more dangerous, so in the formation of the present application, the deposited state in the contact makes handle 12 can't turn to off-position.
Promptly, in Figure 20, as shown in the figure, pass through under the deposited and closed state at permanent joint 21 and movable connection 22, handle 12 is if rotate to closing direction (arrow LA direction), then the engaging protrusion 12c that forms on handle 12 engages with the pressure holding section 13d that is connected connecting rod 13, trips, and can not turn to off-position (handle position shown in the pecked line).Because on the position of this tripping operation, main spring 19 can not surmount the position of bar connection shaft 36, so main spring 19 can not reverse with respect to the action direction of last connecting rod 14.Therefore, handle 12 can not be closed condition, but is returned to original enable possition.According to this formation, when fixed contact 21a and moving contact 22a are deposited, can suppress expansion because of the deposited accident that produces.
Execution mode 5
In addition, in the formation of the present application, the contact in above-mentioned execution mode 4 deposited is under the slight situation, by forcing turning handle 12, can repair.That is, in the state of Figure 20, if make handle 12 force to turn to off-position (position of the handle shown in the pecked line), then engaging protrusion 12c and the pressure rotation section 13e engaging that is connected connecting rod 13 make to connect connecting rod 13 to arrow LC direction pressure rotation.Become possibility if this pressure is rotated, peel off then deposited contact, can become closed condition.According to this formation, identical with above-mentioned execution mode 4, when fixed contact 21a and moving contact 22a are deposited, can suppress expansion because of the deposited accident that produces.
Execution mode 6
In the formation of above-mentioned execution mode 1, when excessive current flow through, as known in the art, the action of excessive current disconnecting apparatus shown in Figure 15 arrow LH, rotated trip(ping) bar 18.If trip(ping) bar 18 rotates to arrow LH direction, then the latch 17 of fastening on trip(ping) bar 18 thrown off.Before be about to throwing off, latch 17 as mentioned above, to being that the rotation fastening 17c of portion that U word shape forms applies elastic force pressure by warpage, the fastening projection 16c of this elastic force pressure clamping rpole 16 rotates to clockwise direction (arrow RD direction).Therefore, latch 17 rotates to arrow RD direction as shown in figure 17, and bar 16 disengagements engage with latch 17, by the elastic force pressure of main spring 19, rotate to arrow LD direction, stop at position shown in Figure 17.This stops is bar 16 by being arranged on stopping that block 11n on the framework 11 carries out.When this bar 16 stopped, handle 12 engaged with the leading section of bar 16, and as shown in the figure, handle 12 stops at the centre position of opening and closing.Thereafter, by the elastic force pressure of torque spring (not having diagram), trip(ping) bar 18 is got back to original position.
As mentioned above, if bar 16 rotates to arrow LD direction, then move as shown in Figure 17 the position of bar connection shaft 36.Move by this, main spring 19 is with respect to the elastic force pressure counter-rotating of last connecting rod 14, and move the position of the downside spring catch 35 in last connecting rod 14.If move the position of downside spring catch 35, then by lower link 15, make to connect connecting rod 13 as shown in figure 22, rotate to arrow LC direction.By this rotation that connects connecting rod 13, movable connection 22 leaves.These actions explain in execution mode 1, in the formation of the present application, are when by above-mentioned tripping operation movable connection 22 being left, and auxiliary connect the starting of connecting rod 13 and constitute.
Connect the formation of the starting of connecting rod 13 for auxiliary this, describe with reference to Figure 21 and Figure 22.At first, Figure 21 is the state of permanent joint 21 and movable connection 22 closures, and this state is identical with the opening of Figure 13.But, connecting on the connecting rod 13, projection contact site 13f, flex point 13g, the contact fastening 13h of portion are set.In addition, utmost point projection 16d is opened in setting on bar 16.
Therefore, from the opening of Figure 21 to the process of the tripped condition of Figure 22, when the direction of arrow LD is rotated, open utmost point projection 16d at bar 16 in Figure 21, mobile like that as shown by arrows.When this moves, open utmost point projection 16d and the projection contact site 13f contact that is connected connecting rod 13, move the auxiliary starting that connects connecting rod 13 to arrow LC direction.After connecting connecting rod 13 startings,, connect connecting rod 13 and rotate rapidly by the elastic force pressure of main spring 19.Rotate rapidly in order not hinder this, open utmost point projection 16d through flex point 13g, fastening contacts the fastening 13h of portion, is the state of Figure 22.In addition, the state of Figure 22 is the state identical with tripped condition shown in Figure 17.As mentioned above, when tripping owing to excessive current, by the auxiliary starting that connects connecting rod, can make movable connection unlatching, leave in advance, suppress the damage of the circuit breaker that causes because of electric arc etc.
Claims (6)
1. circuit breaker has:
The casing that forms by the synthetic resin material;
Permanent joint, this permanent joint are accommodated in the above-mentioned casing, at one end are provided with fixed contact, and the other end is connected with circuit;
Movable connection, this movable connection is relative with the said fixing joint, is provided with moving contact;
The pressing plate that is connected with above-mentioned movable connection;
Be fixed on the framework on the above-mentioned casing;
Latch, the end earth's axis free to rotate of this latch is supported on the said frame, and the other end engages with trip(ping) bar simultaneously, this trip(ping) bar and the interlock of excessive current disconnecting apparatus;
Bar, the end earth's axis free to rotate of this bar is supported on the said frame, and the common fastening of fastening projection of the other end is on above-mentioned latch simultaneously;
Last connecting rod, end of connecting rod is attached on the through hole of the other end of above-mentioned bar free to rotately on this, and the other end is provided with the downside spring catch simultaneously;
Lower link, an end of this lower link links with the above-mentioned connecting rod of going up by above-mentioned downside spring catch free to rotately;
Connect connecting rod, the end earth's axis free to rotate of this connection connecting rod is supported on the said frame, and the other end and above-mentioned pressing plate link simultaneously, and links the other end that above-mentioned lower link is arranged at pars intermedia free to rotately;
Handle, this handle is arranged on the upper end side of said frame free to rotately;
By with above-mentioned handle drives and the main spring that above-mentioned downside spring catch engages, the above-mentioned connecting rod of going up is rotated, rotation elastic force pressure of connecting rod is delivered to above-mentioned connection connecting rod by above-mentioned lower link on this, and make above-mentioned movable connection contact, leave the said fixing joint,
And under the opening of above-mentioned movable connection and said fixing joint-closure, the other end of above-mentioned lower link is positioned at an above-mentioned end of connecting rod and the centre of the other end of going up.
2. circuit breaker as claimed in claim 1, it is characterized in that above-mentioned handle has engaging protrusion, when said fixing contact and above-mentioned moving contact are deposited, this engaging protrusion be connected the pressure holding section engaging that is provided with on the connecting rod above-mentioned, stop above-mentioned handle to rotate to off-position.
3. circuit breaker as claimed in claim 1, it is characterized in that, above-mentioned handle has engaging protrusion, under the deposited state of said fixing contact and above-mentioned moving contact, this engaging protrusion be connected the pressure rotation section engaging that is provided with on the connecting rod above-mentioned, make above-mentioned connection connecting rod force to rotate to closing direction.
4. as each the described circuit breaker in the claim 1 to 3, it is characterized in that, on bar, be provided with and open utmost point projection, open the projection contact site that utmost point projection contacts connecting to be provided with on the connecting rod with above-mentioned, constitute when the tripping operation starting, above-mentionedly open utmost point projection and the above-mentioned projection contact site contact that is connected connecting rod, the auxiliary starting that connects connecting rod.
5. circuit breaker as claimed in claim 4 is characterized in that, connecting on the projection contact site of connecting rod, from open the contact of utmost point projection when tripping operation finishes midway, have the flex point that changes action direction because of contact.
6. circuit breaker as claimed in claim 4 is characterized in that, the contact fastening portion that utmost point projection is opened in fastening when being arranged on the tripping operation end on the projection contact site that connects connecting rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP075013/2004 | 2004-03-16 | ||
| JP2004075013A JP4022524B2 (en) | 2004-03-16 | 2004-03-16 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1670883A CN1670883A (en) | 2005-09-21 |
| CN100536058C true CN100536058C (en) | 2009-09-02 |
Family
ID=35042068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100492892A Expired - Fee Related CN100536058C (en) | 2004-03-16 | 2004-06-10 | Breaker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4022524B2 (en) |
| CN (1) | CN100536058C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4814848B2 (en) * | 2007-08-09 | 2011-11-16 | 三菱電機株式会社 | Circuit breaker |
| JP5297270B2 (en) * | 2009-06-09 | 2013-09-25 | 三菱電機株式会社 | Circuit breaker |
| CN103681138A (en) * | 2013-12-25 | 2014-03-26 | 大全集团有限公司 | Molded-case circuit breaker with isolation function |
| KR101705565B1 (en) * | 2016-07-12 | 2017-02-10 | 혜인전기(주) | Circuit Breaker |
| JP6945499B2 (en) * | 2018-05-31 | 2021-10-06 | 三菱電機株式会社 | Circuit breaker |
| CN114038716B (en) * | 2021-11-10 | 2023-05-09 | 国网新疆电力有限公司超高压分公司 | Pressing plate device for relay protection |
| CN114551174B (en) * | 2022-03-25 | 2023-08-18 | 乐星电气(无锡)有限公司 | Circuit breaker with interlocking protection mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107136A (en) * | 1985-10-31 | 1987-04-29 | 默林·格伦 | A kind of operating mechanism of low-voltage power circuit breaker |
| JP2000040458A (en) * | 1998-07-22 | 2000-02-08 | Matsushita Electric Works Ltd | Circuit breaker |
-
2004
- 2004-03-16 JP JP2004075013A patent/JP4022524B2/en not_active Expired - Fee Related
- 2004-06-10 CN CNB2004100492892A patent/CN100536058C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107136A (en) * | 1985-10-31 | 1987-04-29 | 默林·格伦 | A kind of operating mechanism of low-voltage power circuit breaker |
| JP2000040458A (en) * | 1998-07-22 | 2000-02-08 | Matsushita Electric Works Ltd | Circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005267905A (en) | 2005-09-29 |
| CN1670883A (en) | 2005-09-21 |
| JP4022524B2 (en) | 2007-12-19 |
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