CN202183350U

CN202183350U - Fuse protector

Info

Publication number: CN202183350U
Application number: CN201120064850XU
Authority: CN
Inventors: 卢科军
Original assignee: Noark Electrics Shanghai Co Ltd
Current assignee: Noark Electrics Shanghai Co Ltd
Priority date: 2011-03-11
Filing date: 2011-03-11
Publication date: 2012-04-04
Anticipated expiration: 2021-03-11

Abstract

A fuse protector comprises a melt loading piece for loading a melt and a fuse protector base, wherein the melt loading piece can be manually arranged in a fuse protector base cavity comprising a shell bottom and a shell cover which are buckled and assembled together for disassembling or inserting the melt; two sides of the fuse protector base are provided with a fixed contact and a binding post; the fixed contact is contacted with a movable contact on the melt loading piece; the binding post is used for connecting two fuse protector contacts with a main circuit electrically; the fuse protector further comprises a rotating-straight pull type operating mechanism comprising a semicircle rotation shaft structure which comprises two semi-circle convex shafts and first and second round straight grooves that are installed and matched, so that the melt loading piece can only do turning motion rather than linear motion relative to the fuse protector base in the switching-on operation stage of the melt protector; in the switching-off operation stage of the fuse protector, the melt loading piece realizes mutual conversion between turning motion and linear motion at the transition position when the fuse protector is pulled out or pushed in; and in the pushing-out or pushing-in stage of the fuse protector, the melt loading piece can only do linear motion.

Description

Fuse

Technical field

The utility model relates to a kind of fuse, particularly has the dismountable low-tension fuse of open type structure.

Background technology

Fuse has been a kind of electrical equipment of safeguard protection effect; It can be used for the insulation blocking between power supply and the load; Also be widely used as the protection of electrical network and power consumption equipment, when the circuit of electrical network or power consumption equipment is short-circuited or transships, but the fuse automatic shutdown circuit; To avoid electric equipment to damage, the accident of preventing spreads.The basic structure of fuse mainly is made up of melt, year melt spare and fuse base three parts.The function of melt is that melt can overheated and fusing when overload or short trouble taking place because of circuit cause that electric current is excessive, thereby plays the effect of protection power consumption equipment.Carrying melt spare and fuse base has been support, insulation and protective effect, is processed by insulating material.Carry melt spare and be provided with the cavity of placing melt, be provided with the fuse moving contact, be made generally in the manual operation form, dismounting or insert melt when being used for operating personnel and changing melt but carry a melt spare in the both sides of cavity.Have on the fuse base can with carry melt spare on the moving contact that the is provided with fixed contact and the binding post that contact, it not only is used to install and fix melt, but also is used to realize being electrically connected between melt and the circuit.In the use of fuse, regular meeting changes the operation of melt, promptly unloads melt old or that fused; Change new melt; This action need hot line job, thus the operation of changing melt not only require conveniently, laborsaving, and must guarantee operating personnel's safety.

The fuse of prior art can be divided into Straight pull and rotary two types according to the mode of changing melt.The Straight pull fuse is when changing or melt is installed; Be that the melt spare that carries of the carrying melt in the fuse base is directly pulled out base, melt is separated with contact, the advantage of this structure is that the isolation distance of melt and contact is bigger; Fail safe is better, but operation is required great effort, inconvenience.Rotary fuse is to rotate an angle with carrying the fixed pivot of melt spare around base when changing or melt is installed, and melt is separated with contact, and the advantage of this structure is a rapid operation, but the isolation distance of melt and contact is less, and fail safe is relatively poor.Yet; Solve the above-mentioned defective of prior art; Need to carry the operating mechanism of melt spare with respect to fuse base through innovation; Through this novel operating mechanism, not only to satisfy instructions for uses such as operating physical force is little, the replacing melt is convenient, the handling safety performance is good, and can also realize the optimization of fuse structure and function.

The utility model content

The purpose of the utility model is to overcome the defective of prior art; A kind of fuse is provided; Adopt Analysis of Nested Design operating mechanism cleverly, not only can have Straight pull and rotary two kinds of type of sports as required concurrently, and the convenient conversion that realizes Straight pull and rotary two kinds of type of sports; Have rapid operation, safety, replacing melt advantage easily and efficiently, and have fuse and prevented commentaries on classics, anti-revolution, anti-slip and Presentation Function.

For realizing above-mentioned purpose, the utility model has adopted following technical scheme.

Fuse; Comprise melt 8, carry melt spare 2 and fuse base by what insulating material was processed; Carry melt spare 2 and be provided with the cavity of placing melt 8; The fuse moving contact is arranged on the both sides of this cavity, is arranged on by 1 fastening in the cavity of the fuse base that constituted of being assembled together with cap 3 at the bottom of the shell with the manual operation form but carry melt spare 2, is used for dismounting or insertion melt 8 when operating personnel change melt 8; The both sides of fuse base are provided with fixed

contact

6,9 that can contact with the moving contact of setting on year melt spare 2 and the binding

post

4,5 that respectively two

fuse contacts

6,9 is electrically connected with main circuit.Described fuse also comprises the rotation-Straight pull operating mechanism that is made up of semicircle pivot structure 100; Described semicircle pivot structure 100 comprises two protruding axle 21, the first circle straight troughs 11 of semicircle and the second circle straight trough 31; And the protruding axle 21 of these two semicircles is installed with the first circle straight trough, 11, the second round straight trough 31 respectively and is cooperated; Make that a year melt spare 2 is done following rotational motion with respect to fuse base or straight line moves; In the fuse closing operation stage, carry melt spare 2 with respect to the fuse base motion that can only rotate, can not translation; In the fuse sub-switching operation stage, carry melt spare 2 with respect to fuse base can to fuse pull out or the crossover position of push operation on realize rotating and straight line moves the mutual conversion between these two kinds of forms of motion; Pull out or the push operation stage at fuse, a year melt spare 2 can only be done straight line with respect to fuse base and move.

The utility model also provides other a kind of fuse; Comprise melt 8, carry melt spare 2 and fuse base by what insulating material was processed; Carry melt spare 2 and be provided with the cavity of placing melt 8; The fuse moving contact is arranged on the both sides of this cavity, is arranged on by 1 fastening in the cavity of the fuse base that constituted of being assembled together with cap 3 at the bottom of the shell with the manual operation form but carry melt spare 2, is used for dismounting or insertion melt 8 when operating personnel change melt 8; The both sides of fuse base are provided with fixed

contact

post

4,5 that respectively two

fuse contacts

6,9 is electrically connected with main circuit.Described fuse also comprises rotation-Straight pull operating mechanism, and described rotation-Straight pull operating mechanism comprises semicircle pivot structure 100 and translational guide rail structure 200.Described semicircle pivot structure 100 comprises two protruding axle 21, the first circle straight troughs 11 of semicircle and the second circle straight trough 31; Described translational guide rail structure 200 comprises that protruding 24 and first guide-track groove 113 of two slide blocks, second guide-track groove, 313, the first guide-track grooves 113 and second guide-track groove 313 laterally arrange; Two slide blocks protruding 24 respectively with first guide-track groove 113, second guide-track groove 313 between cooperate for being slidingly matched.The protruding axle 21 of two semicircles of this of described semicircle pivot structure 100 is installed with the first circle straight trough, 11, the second round straight trough 31 respectively and is cooperated; And two slide blocks of described translational guide rail structure 200 protruding 24 are installed and are cooperated with first guide-track groove 113, second guide-track groove 313 respectively; Make that a year melt spare 2 is done following rotational motion with respect to fuse base or straight line moves; In the fuse closing operation stage; Two slide blocks protruding 24 separate with first guide-track groove 113, second guide-track groove 313 respectively, make to carry melt spare 2 with respect to the fuse base motion that can only rotate, can not translation; In the fuse sub-switching operation stage; Two slide blocks protruding 24 get into the porch of first guide-track groove 113, second guide-track groove 313 respectively, make carry melt spare 2 with respect to fuse base can from the fuse separating brake to pulling out or the crossover position of push operation is realized rotating and straight line moves the mutual conversion between these two kinds of forms of motion; Pull out or the push operation stage at fuse, a constraint year melt spare 2 can only be done straight line with respect to fuse base and move; And it is consistent that the straight line that melt spare 2 is carried in described semicircle pivot structure 100 constraints moves the moving direction that moves with the straight line of translational guide rail structure 200 constraint year melt spares 2.

The protruding axle 21 of described two semicircles is formed on and carries on the melt spare 2, and the first circle straight trough 11 and the second circle straight trough 31 are formed on the fuse base; In the protruding axle of perhaps described two semicircles 21 one is formed at the bottom of the shell of fuse base on 1, and another is formed on the cap 3 of fuse base, the first circle straight trough 11 and the second circle straight trough 31 are respectively formed at and carry on the melt spare 2; The described first circle straight trough 11 comprises first circular groove 111 and first straight trough 112; The radius R 1 of first circular groove 111 equals the width H1 of first straight trough 112; The medial surface of first straight trough 112 and the inner headed face of first circular groove 111 are tangent, and first straight trough 112 communicates with first circular groove 111; The described second circle straight trough 31 comprises second circular groove 311 and second straight trough 312; The radius R 2 of second circular groove 311 equals the width H2 of second straight trough 312; The medial surface of second straight trough 312 and the inner headed face of second circular groove 311 are tangent, and second straight trough 312 communicates with second circular groove 311; In the protruding axle 21 of described two semicircles; The radius R A that the semicircle protruding axle 21 that cooperates is installed with the first circle straight trough 11 equates with the radius R 1 of first circular groove 111; The radius R B that the semicircle protruding axle 21 that cooperates is installed with the second circle straight trough 31 equates with the radius R 2 of second circular groove 311; The axle center of two protruding axles 21 of semicircle is concentric, and the center of circle of first circular groove 111 is concentric with the center of circle of second circular groove 311; The first circle straight trough 11 and the second circle straight trough 31 are symmetrical set; The protruding axle 21 of two semicircles respectively with first circular groove 111, second circular groove 311 between to cooperate be matched in clearance, two protruding axles 21 of semicircle respectively with first straight trough 112, second straight trough 312 between cooperate for being slidingly matched.

The protruding axle 21 of described two semicircles is identical semicylinder, and its cross sections shape is semicircle.Each semicircle protruding axle 21 comprises a plane 212 and an arc surface 213 that is parallel to the protruding axle of this semicircle 21 axis, and said arc surface 213 is the semi-cylindrical of the semicylinder of semicircle protruding axle 21.

Two slide blocks of described translational guide rail structure 200 protruding 24 are formed on and carry on the melt spare 2, and first guide-track groove 113 is formed at the bottom of the shell of fuse base on 1, and second guide-track groove 313 is formed on the cap 3 of fuse base; In the slide block of perhaps described translational guide rail structure 200 protruding 24 one is formed at the bottom of the shell of fuse base on 1, and another is formed on the cap 3 of fuse base, and first guide-track groove 113 and second guide-track groove 313 are respectively formed on year melt spare 2; The porch of the lower end of described first guide-track groove 113 and second guide-track groove 313 respectively is tubaeform, is used to guide two slide blocks protruding 24 to get into first guide-track groove 113 and second guide-track groove 313 respectively.The upper end of described first guide-track groove 113 and second guide-track groove 313 is used for preventing that respectively by 1 shutoff at the bottom of the shell of fuse base two slide blocks protruding 24 from pulling out from first guide-track groove 113 and second guide-track groove 313 respectively.

Described fuse comprises that also preventing carrying melt spare 2 crosses the commentaries on classics location structure; Described anti-mistake change location structure comprise be formed at the bottom of the shell 1 and/or cap 3 on convexity 118, be formed on the convex shoulder 211 that carries on the melt spare 2; When a year melt spare 2 turns to closing position; Described protruding 118 contact with convex shoulder 211, carry melt spare 2 inordinate rotation forward under "on" position with restriction.

Described fuse also comprises the anti-melt spare 2 revolution location structures that carry; Described anti-revolution location structure comprise be formed at the bottom of the shell 1 and/or cap 3 on flange 115, be formed on the boss 27 that carries on the melt spare 2; When a year melt spare 2 turns to closing position; Boss 27 is blocked by flange 115, and it is free toward back rotation under "on" position to carry melt spare 2 with restriction.

Described fuse also comprise be formed at the bottom of the shell 1 and/or cap 3 on guide plane 116, be formed on the guide surface 28 of carrying on the melt spare 2; Described guide plane 116 and the first circle straight trough, 11, the second round straight trough 31 are parallel to each other; When a year melt spare 2 turns to the separating brake position, guide plane 116 and guide surface 28 parallel and contacts; Carry that a melt spare 2 is pulled out or push-on process in, guide plane 116 contacts also slide relative with guide surface 28.

Described fuse also comprise be formed at the bottom of the shell 1 and/or cap 3 on anticreep block 114, be formed on the anticreep boss 26 that carries on the melt spare 2; When a year melt spare 2 was pulled out to maximum pull-out location, anticreep boss 26 was blocked by anticreep block 114, was not pulled so that carry a melt spare 2.

The taper type that the cavity of described year melt spare 2 becomes opening to enlarge, the said cavity or in cavity, take out so that melt 8 is packed into easily.The cavity hatch place of described year melt spare 2 is provided with a melt block 22, freely comes off in said cavity in order to prevent melt 8.

Described fuse also comprises the blown fuse indicator 7 that is arranged on year melt spare 2; It comprises resistance 72, LED lamp 71, contact chip and the display window 73 that is installed on year melt spare 2; Described contact chip and resistance 72, LED lamp 71 are connected in series; And contact chip is in parallelly connected state with melt 8, is in "on" position when fuse but melt 8 is not installed or during melt 8 fusing, and said LED lamp 71 is bright.

Description of drawings

Fig. 1 is the structural representation plane graph of the fuse of the utility model, and the assembly relation at the bottom of fuse is in the shell that carries melt spare and fuse base under the "on" position has been shown among the figure.

Fig. 2 is the schematic perspective view of fuse shown in Figure 1, fuse has been shown among the figure has been in the assembly relation that carries melt spare and the cap of fuse base under the "on" position.

Fig. 3 is the structural representation plane graph of the fuse of the utility model, and the assembly relation at the bottom of fuse is in separating brake and prepares the shell that carries melt spare and fuse base of pulling out under the state has been shown among the figure.

Fig. 4 is the schematic perspective view of fuse shown in Figure 3, fuse has been shown among the figure has been in the assembly relation that carries melt spare and the cap of fuse base under the gate-dividing state.

Fig. 5 is the structural representation plane graph of the fuse of the utility model, and the assembly relation at the bottom of fuse is in the shell that carries melt spare and fuse base under the state of pulling out has been shown among the figure.

Fig. 6 is the schematic perspective view of fuse shown in Figure 5, fuse has been shown among the figure has been in the assembly relation that carries melt spare and the cap of fuse base under the state of pulling out.

Fig. 7 is the design of part sketch map at the bottom of the shell of fuse base of the utility model.

Fig. 8 is the design of part sketch map of cap of the fuse base of the utility model.

Fig. 9 is the design of part sketch map that carries melt spare of the fuse of the utility model, and the structure of blown fuse indicator has been shown among the figure.

Embodiment

Below in conjunction with embodiment shown in the drawings, further describe the embodiment of the utility model.The execution mode of the utility model is not limited to following examples.

Referring to the combined floodgate shown in Fig. 1 to 6, separating brake, pull out the structural representation plane graph and the schematic perspective view of state, the fuse of the utility model comprises melt 8, carries melt spare 2 and fuse base by what insulating material was processed.Carry melt spare 2 and be provided with the cavity of placing melt 8, the fuse moving contact is arranged on the both sides of cavity, the taper type that cavity becomes opening to enlarge, the cavity or in cavity, take out so that melt 8 is packed into easily.The cavity hatch place is provided with a melt block 22, in order to block melt 8, melt 8 can freely not come off in cavity.Be arranged on the fuse base with the manual operation form but carry melt spare 2, be used for dismounting or insertion melt 8 when operating personnel change melt 8.Fuse base by a shell at the bottom of 1 and cap 3 fasten each other and be assembled together and form, carry melt spare 2 be carried on this base by 1 fastening in the formed cavity at the bottom of the shell with cap 3.The both sides of fuse base are provided with the

fixed contact

6,9 and the

binding post

4,5 that is used to be connected main circuit that can contact with the moving contact of setting on year melt spare 2; In Fig. 1,3, the embodiment shown in 5, one of them of two binding posts is installed at the bottom of the shell of fuse base 1, and another is installed on the cap 3; Two

binding posts

4,5 are electrically connected with two

contacts

6,9 respectively; Specifically, binding post 4 is electrically connected with contact 6, and binding post 5 is electrically connected with contact 9.Obviously, also can these two

binding posts

4,5 be installed at the bottom of the shell on 1, perhaps be installed on the cap 3.The utility model described " being installed on the fuse base " comprise two similar elements be installed at the bottom of the shell of this base on, two similar elements are installed on the cap of this base; On also comprising at the bottom of one of them shell that is installed in this base, another then is installed on the cap of this base.Following many places relate to two similar elements and install or be formed on all suitable this know-why of similar situation on the fuse base, for avoiding repetition, will give unnecessary details no longer one by one.

Operating personnel make

melt

8 and 6, the 9 contact/disjunctions of fuse contact through to carrying the combined floodgate/sub-switching operation of melt spare 2.Be under the "on" position (state as illustrated in fig. 1 and 2) at fuse, closing operation make carry melt spare 2 two ends moving contact respectively be installed in fuse base on two

fuse contacts

6,9 contact, melt 8 is connected in series in the main circuit at this moment.If main circuit is short-circuited or transships, then melt 8 melts because of overheated, thereby main circuit is cut off.Be under the gate-dividing state (state shown in Fig. 3 and 4) at fuse, two

fuse contacts

6,9 can all separate with melt 8, or contact 6 separates with melt 8, or contact 9 separates with melt 8.Preferred first kind of scheme shown in Figure 3 in above three kinds of schemes, this scheme particularly under gate-dividing state melt 8 be exposed under the situation of outside safer.The melt spare 2 that carries at fuse is pulled out under the state (state as illustrated in Figures 5 and 6), can change fused mass of fuse 8.

Rotation-Straight pull the operating mechanism of the fuse of the utility model is described below in conjunction with Fig. 1 to 8.This rotation-Straight pull operating mechanism comprises semicircle pivot structure 100 and translational guide rail structure 200.Semicircle pivot structure 100 is not merely the rotary manipulation action pivot point is provided; But also for vertical pulling/directly the push operation action provides straight-line guidance; That is to say that semicircle pivot structure 100 constraint year melt spares 2 are that rotation or straight line move with respect to the forms of motion of fuse base.Translational guide rail structure 200 that is to say that for vertical pulling/straight push operation action provides straight-line guidance translational guide rail structure 200 constraint year melt spares 2 are that straight line moves with respect to the forms of motion of fuse base.Because all having participated in constraint with translational guide rail structure 200, semicircle pivot structure 100 carries the forms of motion of melt spare 2 with respect to fuse base; Therefore rotation-Straight pull operating mechanism the key of the utility model will be resolved by semicircle pivot structure 100 straight line that melt spare 2 is carried in 200 common constraints with the translational guide rail structure and move the technical problem of being brought; The problem that comprises between semicircle pivot structure 100 and the translational guide rail structure 200 how co-ordination will overcome semicircle pivot structure 100 and translational guide rail structure 200 these two mechanisms in other words and carry mutual interference mutually and conflicting problem in the process of forms of motion of melt spare 2 in common constraint.The characteristics of the rotation of the utility model-Straight pull operating mechanism are, when fuse combined floodgate/sub-switching operation, adopt the rotary manipulation action, and pull out at fuse/adopt vertical pulling/straight push operation action during push operation.Because spinning movement has the little characteristics of operating physical force; So spinning movement is used to control melt 8 and fuse contact 6; Contact between 9 or disjunction make combined floodgates/sub-switching operation very light, and the vertical pulling action is used to replacing melt 8 enough big isolation distance is provided.Here so-called isolation distance is meant melt 8 and fuse contact 6; Spacing distance between 9; The too little meeting of isolation distance causes following problem: because of the distance of the disjunction between melt 8 and the

charged fuse contact

6 or 9 too little; Make the operating space of changing melt 8 little and make inconvenient operation and the reduction of insulation safety property; When changing melt 8, might touch electrified body and have potential safety hazard, and the utility model adopts rotation-Straight pull operating mechanism, effectively overcome the big and little problem of isolation distance of operating physical force of prior art.Specifically, concrete technical scheme below the utility model has adopted has solved an above-mentioned difficult problem dexterously.The utility model carries melt spares 2 through 100 constraints of semicircle pivot structure has two with respect to the forms of motion of fuse base; One is to rotate, and another is that straight line moves, and can also change each other between moving with straight line rotating; That is to say; Carry melt spare 2 and can be transformed into state and the position that straight line moves from state and the position of rotating, and, state and position that state that year melt spare 2 also can move from straight line and position are transformed into rotation.As previously mentioned; The rotation formula that carries melt spare 2 is used for the combined floodgate or the sub-switching operation of fuse; That is to say that the operation of

melt

8 and 6,9 contacts of two fuse contacts or disjunction is to realize through the rotation of carrying melt spare 2; And the rotation of carrying melt spare 2 is formed by the constraint of semicircle pivot structure 100, and this constraint makes carries the fulcrum rotation that melt spare 2 can wind to be provided by semicircle pivot structure 100.The straight line that carries melt spare 2 moves form and is used for pulling out of fuse or push operation; This is pulled out or push operation is meant and pulls out or push in 1 base cavity pocket that forms with cap 2 at the bottom of the shell of fuse base carrying melt spare 2; This pulls out operation is in order to check or to change melt 8 and (have only the melt spare 2 of carrying to pull out; Could melt 8 be taken out in the cavity that carries melt spare 2); And forward operation is to shift onto in the cavity by 1 fuse base that forms with cap 3 at the bottom of the shell carrying melt spare 2, and enters into rotating position, so that a year melt spare 2 is carried out rotating operation (being closing operation).Another kind of execution mode according to the utility model; Carry melt spares 2 by translational guide rail structure 200 constraint and have only one with respect to the forms of motion of fuse base; Be that straight line moves; And this straight line moves that to carry the moving direction that the straight line of melt spares 2 moves consistent with 100 constraints of semicircle pivot structure, do not disturb mutually.Carry out in the overall process of rotating operation (being fuse combined floodgate/sub-switching operation) at a year melt spare 2, translational guide rail structure 200 must be removed carrying the constraint of melt spare 2 all the time, and promptly translational guide rail structure 200 can not disturb the rotation of carrying melt spare 2 all the time.

Referring to Fig. 7, Fig. 8; Semicircle pivot structure 100 comprises and is formed on the protruding axle of two semicircles of carrying on the melt spare 2 21 (see figure 1)s, is formed at the bottom of the shell the first circle straight trough 11 on 1, is formed on the circle of second on the cap 3 straight trough 31; Two protruding axles 21 of semicircle are installed with the first circle straight trough, 11, the second round straight trough 31 respectively and are cooperated; Cooperate with the installation of a protruding axle 21 of semicircle through the first circle straight trough 11; And second circle straight trough 31 cooperates with the installation of another semicircle protruding axle 21, constraint carry melt spare 2 with respect to the shell of fuse base at the bottom of 1, the forms of motion of cap 3 can only be for rotating or straight line moves, and can between rotation and straight line move, change.That is to say; Cooperate with the first circle straight trough 11 and 31 installations of the second circle straight trough respectively by two protruding axles 21 of semicircle; Can retrain and carry that a melt spare 2 can rotate respectively or straight line moves, and rotation and straight line move and can not carry out simultaneously, but can change each other between them.Semicircle pivot structure 100 can retrain and carry melt spare 2 and have and rotate and function that straight line moves two forms of motion and can between two kinds of forms of motion, change each other, through following concrete structure realization.As shown in Figure 7; The first circle straight trough 11 comprises first circular groove 111 and first straight trough 112; The radius R 1 of first circular groove 111 equals the width H1 of first straight trough 112, and the medial surface of first straight trough 112 and the inner headed face of first circular groove are tangent, and first straight trough 112 communicates with first circular groove 111.As shown in Figure 8; The second circle straight trough 31 comprises second circular groove 311 and second straight trough 312; The radius R 2 of second circular groove 311 equals the width H2 of second straight trough 312, and the medial surface of second straight trough 312 and the inner headed face of second circular groove 311 are tangent, and second straight trough 312 communicates with second circular groove 311.Like Fig. 1, shown in 3; In two protruding axles 21 of semicircle; Semicircle protruding spools 21 the radius R A that matches with the first circle straight trough 11 with equate with the radius R 1 of first circular groove 111; Equate with the radius R 2 of second circular groove 311 that with the live in peace with each other radius R B of the semicircle protruding axle 21 that assembling closes of the second circle straight trough 31 axle center that two semicircles are protruding 21 is concentric, the center of circle of first circular groove 111 is concentric with the center of circle of second circular groove 311.Two protruding axles 21 of semicircle are installed with the first circle straight trough, 11, the second round straight trough 31 respectively and are cooperated; It installation that comprises two stages cooperates; It is that two protruding axles 21 of semicircles are installed and cooperated with first circular groove 111, second circular groove 311 respectively that phase I install to cooperate, and second stage installs that to cooperate be that two protruding axles 21 of semicircles cooperate with first straight trough 112,312 installations of second straight trough respectively.By Fig. 1 or 3 visible, the phase I installs to cooperate with the second stage installation and cooperates and can only carry out respectively, can not carry out simultaneously, but can change each other between them.Passing through phase I installation cooperation and second stage installation just cooperates and the mutual conversion between them; Through a cover mechanism carried out year melt spare 2 with respect to the forms of motion of fuse base for rotating or straight line moves, and can rotate and straight line moves between two kinds of forms and changes.The protruding axle 21 of two semicircles cooperates with the installation of first circular groove 111, second circular groove 311 respectively and is meant: radius is that semicircle protruding axle 21 and the radius of RA be that the installation of first circular groove 111 of R1 cooperates is matched in clearance, and it be that the installation of second circular groove 311 of R2 cooperates with radius is matched in clearance that radius is semicircle protruding 21 of RB.Referring to Fig. 1; When (the position as shown in Figure 1, position that two protruding axles 21 of semicircle are in respectively in first circular groove 111 and second circular groove 311; That is phase I installation cooperation position) time; First circular groove 111 and the semicircle protruding axle 21 of second circular groove, 311 constraints rotate around a fulcrum, and this fulcrum is exactly the concyclic heart of first circular groove 111 and second circular groove 311.This shows; Cooperates with the installation of second circular groove 311 of first circular groove 111 of the first circle straight trough 11, the second circle straight trough 31 respectively through the protruding axle 21 of two semicircles, having formed semicircle pivot structure 100 constraints, to carry melt spares 2 (this year melt spare 2 be fixedly connected with two protruding axles 21 of semicircles or integrally formed) be rotation with respect to (first circular groove 111 be formed at the bottom of this shell 1 on) at the bottom of the fuse base shell 1 and the forms of motion of cap 3 (second circular groove 311 is formed on this cap 3).The protruding axle of described two semicircles 21 cooperates with the installation of first straight trough 112, second straight trough 312 respectively and is meant: it is that the installation of first straight trough 112 of H1 cooperates for being slidingly matched with width that radius is semicircle protruding 21 of RA, and it is that the installation of second straight trough 312 of H2 cooperates also for being slidingly matched with width that radius is semicircle protruding 21 of RB.The first circle straight trough 11 is symmetrical set with the second circle straight trough 31, and this is symmetrical set and is meant such setting: not only first circular groove 111 is mutual concentric with second circular groove 311, and first straight trough 112 and second straight trough 312 are parallel to each other.Because first straight trough 112 and second straight trough 312 all are straight-line grooves; So (this position is not shown when the protruding axle 21 of two semicircles is in the position of first straight trough 112 and second straight trough 312 respectively; Be that second stage is installed cooperation position) time, two protruding axles 21 of semicircle can be in first straight trough 112 and second straight trough 312 linear slide.This shows; Cooperates with the installation of second straight trough 312 of first straight trough 112 of the first circle straight trough 11, the second circle straight trough 31 respectively through the protruding axle 21 of two semicircles, having formed semicircle protruding axle construction 100 constraints, to carry melt spares 2 (this year melt spare be fixedly connected with protruding 21 of two semicircle or integrally formed) be that straight line moves with respect to (first straight trough 112 be formed at the bottom of this shell 1 on) at the bottom of the fuse base shell 1 and the forms of motion of cap 3 (second straight trough 312 is formed on this cap 3).Because first circular groove 111 of the first circle straight trough 11 communicates with first straight trough 112; And the medial surface of first straight trough 112 and the inner headed face of first circular groove 111 are tangent; Second circular groove 311 of the second circle straight trough 31 communicates with second straight trough 312; And the medial surface of second straight trough 312 and the inner headed face of second circular groove 112 are tangent, thus two protruding axles 21 of semicircle must exist one as shown in Figure 3 both in the position of first circular groove 111, second circular groove 311, the also crossover position in first straight trough 112, second straight trough 312 simultaneously; Only under this crossover position state; The protruding axle 21 of two semicircles both can rotate, and also can move, and had realized that just semicircle pivot structure 100 constraints carry melt spares 2 and can change each other between moving with straight line rotating with respect to the forms of motion of fuse base.

Two protruding axles 21 of semicircle have same structure; Be semicylinder; Its cross section is a semicircle; So each semicircle protruding axle 21 comprises a plane 212 and an arc surface 213, described plane 212 be meant semicircle protruding axle 21 axis and with the plane of this parallel axes, described arc surface 213 is meant the semi-cylindrical of semicircle protruding 21 semicylinder.The protruding axle 21 of two semicircles concerns setting by following respectively and between first straight trough 112, second straight trough 312: when fuse is in "on" position; The protruding axle 21 of two semicircles is in the position (position as shown in Figure 1) in first circular groove 111, second circular groove 311 respectively; At this moment; Arc surface 213 difference of two protruding axles 21 of semicircle are (upper and lower relation is as the criterion with Fig. 1) up; And respectively towards first straight trough 112 and second straight trough 312; And two planes 212 of the protruding axle 21 of two semicircles (upper and lower relation is as the criterion with Fig. 1) down respectively is and not parallel with two medial surfaces of first straight trough 312 respectively, and promptly these two planes 212 are respectively towards the inner headed face of first circular groove 111 and second circular groove 311.Because RA=H1; RB=H2, thus diameter 2RA＞H1, diameter 2RB＞H2; The diameter of the protruding axle 21 of two semicircles is respectively greater than the width of first straight trough 112 and second straight trough 312; So under "on" position, two protruding axles 21 of semicircle are stably constrained in respectively in first circular groove 111 and second circular groove 311, so that fuse stably remains on "on" position.When fuse was in gate-dividing state, two protruding axles 21 of semicircle were in crossover position (position as shown in Figure 3) respectively, at this moment; Two planes of two protruding axles 21 of semicircle are parallel to two medial surfaces of first straight trough 112 and second straight trough 312 respectively; Because the radiuses of two semicircle protruding axles 21 equal the width of first straight trough 112 and second straight trough 312 respectively, i.e. RA=H1, RB=H2; So under this state; Through applying the operating physical force that is pulled outwardly to carrying melt spare 2, then two protruding axles 21 of semicircle can move by outside straight line in first straight trough 112 and second straight trough 312, are drawn out up to carrying a melt spare 2.At described crossover position; If apply clockwise moment of torsion shown in Figure 3 to carrying melt spare 2; Then two protruding axles 21 of semicircle can rotate by clockwise direction as shown in Figure 3 in first circular groove 111 and second circular groove 311, get back to "on" position up to carrying melt spare 2.

Embodiment shown in Figure 3 is the left side that first straight trough 112 is arranged on first circular groove 111; Promptly first straight trough 112 is facing to the left semicircle of first circular groove 111; Not hard to imagine, the alternative another program of this embodiment is the right semi-circle of first straight trough 112 facing to first circular groove 111.Under this scheme; Protruding 21 and first straight trough of described two semicircles 112, second straight trough 312 need to be provided with by following morpheme relation: when fuse is in "on" position; Two planes, 212 difference of two protruding axles 21 of semicircle are (upper and lower relation is as the criterion with accompanying drawing 1) up; And respectively towards first straight trough 112 and second straight trough 312; Two arc surfaces 213 of the protruding axle 21 of two semicircles are (upper and lower relation is as the criterion with Fig. 1, promptly respectively towards the inner headed face of first circular groove 111 and second circular groove 311) respectively down, and two planes 212 are not parallel with two medial surfaces of first straight trough 112 and second straight trough 312 respectively.When fuse was in gate-dividing state, two planes 212 of two protruding axles 21 of semicircle were parallel to two medial surfaces of first straight trough 112 and second straight trough 312 respectively.

Fig. 1, the embodiment shown in 3 are that two protruding axles 21 of semicircle are arranged on year melt spare 2; And the first circle straight trough 11 and the second circle straight trough 31 are separately positioned at the bottom of the shell of base on 1 and on the cap 3; Alternative another program is: described semicircle pivot structure 100 comprise be respectively formed at the bottom of the shell that the first circle straight trough that carries on the melt spare 2 and the second circle straight trough, two protruding axles of semicircle be respectively formed at base 1 and cap 3 on, two protruding axles of semicircles are installed with the first circle straight trough and the second circle straight trough respectively and are cooperated.This scheme only is that relation is set is different with embodiment shown in the drawings, and other is all identical, so its operation principle and straight trough width (H1, H2), circular groove radius (R1, R2), semicircle protruding structure and parameters such as shape are identical with enforcement shown in the drawings.

More than rotation-Straight pull the operating mechanism of the utility model of explanation is made up of semicircle pivot structure 100, and this mechanism can also be made up of with translational guide rail structure 200 semicircle pivot structure 100 jointly.Translational guide rail structure 200 comprise be formed on two slide blocks that carry on the melt spare 2 protruding 24, be formed at the bottom of the shell first guide-track groove 113 on (1) and be formed on second guide-track groove 313 on the cap 3; Under fuse is in "on" position; Two slide blocks protruding 24 separate (as shown in Figure 1) with first guide-track groove 311, second guide-track groove 313 respectively; Under fuse is in gate-dividing state; Two slide blocks protruding 24 get into the porch (as shown in Figure 3) of first guide-track groove 113, second guide-track groove 313 respectively; Pull out at fuse/the push operation process in, two slide blocks protruding 24 are installed and are cooperated (as shown in Figure 5) with first guide-track groove 113, second guide-track groove 313 respectively, this installations cooperates a permission year melt spare 2 to do straight line with respect to fuse base to move.First guide-track groove 113 and second guide-track groove 313 are parallel to each other and are symmetrical set; And first guide-track groove 113, second guide-track groove 313 and first straight trough 112, second straight trough 312 are parallel to each other; Through such setting; Make straight line that melt spares 2 are carried in 100 constraints of semicircle pivot structure move that to carry the moving direction that the straight line of melt spares 2 moves consistent with 200 constraints of translational guide rail structure, do not disturb mutually between moving to guarantee two straight lines that semicircle pivot structure 100 and translational guide rail structure 200 retrain year melt spare 2 respectively.Two slide blocks protruding 24 respectively with first guide-track groove 113, second guide-track groove 313 between cooperate for being slidingly matched.As previously mentioned; Retrain combined floodgate or the sub-switching operation that year melt spare 2 rotating forms of motion are used for fuse by semicircle rotational structure 100, but be used for pulling out of fuse or push operation by semicircle pivot structure 100 and the forms of motion that translational guide rail structure 200 common constraint year melt spare 2 straight lines move.Fig. 1,3, the embodiment shown in 5 have adopted two parts can both provide straight line to move the structure of form; Wherein a cover is semicircle pivot structure 100; Another set of is translational guide rail structure 200; Advantage is under the prerequisite of the volume that does not increase fuse base, can increase the stroke of pulling out or pushing that carries melt spare 2, to obtain bigger desirable isolation distance.In other words: if do not consider to reduce at the bottom of the shell 1 with the volume of cap 3; Promptly on basis shown in Figure 5; With 1 extending upward at the bottom of the shell with the shell of cap 3, make semicircle protruding axle 21 not break away from first straight trough 112 and second straight trough 312, translational guide rail structure 200 can save so.If do not consider to increase the stroke of pulling out or pushing that carries melt spare 2, promptly on basis shown in Figure 5, restriction is carried molten 2 and is pulled out first straight trough 112 and second straight trough 312, and translational guide rail structure 200 also can save so.This shows that the basic goal that adopts translational guide rail 200 is to obtain bigger desirable isolation distance and the volume that reduces fuse.The porch flue of the lower end of first guide-track groove 113; The porch of the lower end of second guide-track groove 313 is flue also; Be in gate-dividing state (the i.e. state that preparation is pulled out at fuse; State as shown in Figure 3) time, two slide blocks protruding 24 get into the flaring porch of first guide-track groove 113 and the flaring porch of second guide-track groove 313 respectively.Through this flaring inlet, guide two slide blocks 24 to enter into first guide-track groove 113 and second guide-track groove 313 respectively smoothly.1 shutoff at the bottom of the upper end pitamen of described first guide-track groove 113; The upper end of second guide-track groove 313 is by cap 3 shutoff; Prevent that through described shutoff two slide blocks protruding 24 from pulling out respectively from first guide-track groove 113 and second guide-track groove 313; Just when a year melt spare 2 was pulled out to maximum position as shown in Figure 5, two slide blocks protruding 24 still were trapped in first guide-track groove 113 and second guide-track groove 312.Two slide blocks protruding 24 of the translational guide rail structure 200 of embodiment shown in Figure 3 are formed on and carry on the melt spare 2; And first guide-track groove 113 and second guide-track groove 313 be respectively formed at the bottom of the shell of fuse base 1 with cap 3 on; Alternative scheme is: two slide blocks protruding 24 of translational guide rail structure 200 are respectively formed on the base; One of them slide block convexity can be formed at the bottom of the shell on 1; Another slide block convexity then is formed on the cap 3, and first guide-track groove and second guide-track groove are respectively formed on year melt spare 2.

In order to strengthen operation convenience and fail safe, the fuse of the utility model also comprises prevented commentaries on classics location structure and anti-revolution location structure, to prevent that carrying melt spare 2 freely rotates under "on" position.Prevent changeing location structure and be used to limit year melt spare 2 direction continuation inordinate rotation (clockwise direction shown in Figure 1 rotates) forward towards closing operation under "on" position.And anti-revolution location structure is used for restriction year melt spare 2 past back rotation (counter clockwise direction shown in Figure 1 is rotated) under "on" position.As shown in Figure 1; Preventing changeing location structure comprises the convexity 118 that is formed on the fuse base, is formed on the convex shoulder 211 that carries on the melt spare 2; When a year melt spare 2 forwards closing position to; Described protruding 118 contact with convex shoulder 211, block convex shoulder 211 through protruding 118, thereby have limited year melt spare 2 inordinate rotation forward.The convexity 118 here has two; One of them is formed at the bottom of the shell on 1, and another is formed on the cap 3, just foregoing " being formed on the convexity 118 on the fuse base "; Not hard to imagine, alternative scheme is: two convexities 118 all can be formed at the bottom of the shell 1 or cap 3 on.As shown in Figure 3; Anti-revolution location structure comprises the flange 115 that is formed on the fuse base, the boss 27 that is formed on both sides on year melt spare 2; When a year melt spare 2 turned to closing position, boss 27 was blocked and blocks by flange 115, and it is free toward back rotation to carry melt spare 2 with restriction.In the closing operation process, position between boss 27 and the flange 115 relation changes, promptly by change in location shown in Figure 3 to position shown in Figure 1; In this change procedure, boss 27 need be crossed flange 115, and this is crossed action and is through strain between boss 27 and the flange 115 and cooperates realization; The required power of described strain is provided by closing operation power; Therefore, in fact when closing position, boss 27 is blocked by flange 115; Certainly flange 115 also keeps off toward boss 27, thereby has limited the revolution of year melt spare 2.Round boss 27 only is in the flange that just places under the closed state on the base 115 times carrying melt spare 2 and

fuse contact

6,9; Main consideration is after melt 8 is installed; Melt is fixedly clamped by contact; Though this moment, melt was fixed, because of the cavity of year melt spare 2 expands outwardly when the closed procedure, melt also can rotate within the specific limits.Therefore through flange 115 restriction boss 27, prevent that melt from producing easily.At the bottom of the shell because of fuse base, cap all is to have certain flexible working of plastics, therefore when operation as long as application point power a little just can overcome the restriction normal running.In the sub-switching operation process; Position between boss 27 and the flange 115 concerns by change in location shown in Figure 1 to position shown in Figure 3; Obviously boss 27 still need be crossed flange 115; This is crossed is through the strain between boss 27 and the flange 115 equally and cooperates and realize, and the required power of this strain is provided by sub-switching operation power.The setting of flange 115 also can be by it only being formed at the bottom of the shell on 1 or flange 115 only forms on the cap 3 except that the scheme shown in Fig. 3 embodiment.

Referring to Fig. 1,3,5, described fuse also comprises pulls out/pushes guide structure and anti-slip structure.Pull out/push guide structure be used to guide carry melt spare 2 pull out or push direction; Though semicircle pivot structure 100 also has the function of pulling out or push direction that melt spare 2 is carried in guiding; But reason owing to the volume and weight that carries melt spare 2; Depend thiner semicircle pivot structure 100 alone and be not enough to reliable the carrying sometimes and pull out or push required operating physical force, thus preferably set up one can carry pull out more greatly or push operation power pull out/push guide structure.Described pulling out/push guide structure comprises the guide plane 116 that is formed on the base and is formed on the guide surface 28 of carrying on the melt spare 2.When a year melt spare 2 forwards preparation pull-out location (position as shown in Figure 3 also is the separating brake position) to, guide plane 116 and guide surface 28 parallel and contacts.Carry the pulling out of melt spare 2/or push-on process in, guide plane 116 and guide surface 28 slide relative.Guide plane 116 is parallel to first straight trough 112 and second straight trough 312 is provided with, and just guide plane 116 and first is justified straight trough 11, the second circle straight trough (31) is parallel to each other.The setting of relevant guide plane 116, not only comprised two guide planes 116 as shown in the figure be respectively formed at the bottom of the shell 1 with cap 3 on, and guide plane 116 can also only be formed at the bottom of the shell on 1 or guide plane only is formed on the cap 3.The purposes of anti-slip structure is stop to carry a melt spare 2 when pulling out, to be separated from the bottom of the shell 1 or cap 3.Described anti-slip structure comprises anticreep block 114 that is formed on the fuse base and the anticreep boss 26 that is formed on year melt spare 2; Anticreep boss 26 effects on the fusing carrier 2 are similar with boss 27; After a year melt spare 2 rotates to open position; Anticreep boss 26 just slips in the housing boss 317, can prevent to carry melt spare 2 and turn round easily, and an effect provides a breakover point; Be used to point out next step action can pull out operation; Another effect is when under carrying the situation of not pulling out after melt spare 2 produces, changing melt 8, to prevent to carry 2 revolutions of melt spare and cause an end of fuse-link spare 2 and fuse contact isolation distance to reduce, to guarantee safety operation.After a year melt spare 2 was pulled out, anticreep boss 26 slipped in the housing boss 314, can prevent to carry a melt spare 2 and push easily; Effect is when changing or melt 8 is installed; Prevent to carry that a melt spare 2 moves and melt is installed in inconvenience, carry melt spare 2 restricted after, can be fixed on this desired location to a certain extent.When a year melt spare 2 was pulled out to maximum pull-out location (position shown in Figure 5), anticreep boss 26 was blocked by anticreep block 114, was pulled out to stop year melt spare 2.Because of carrying melt spare 2 is working of plastics, and anticreep boss 26 has certain elasticity, can lift restrictions as long as apply certain operation.

Because 1 shutoff at the bottom of first guide-track groove, the 113 upper end pitamens of translational guide rail structure 200; Second guide-track groove, 313 upper ends are by cap 3 shutoff; So translational guide rail structure 200 itself also has the structure of anti-slip; Thereby served as auxiliary anti-slip function in fact by the anti-slip structure that anticreep block 114, anticreep boss 26 are formed, in the bigger pullout forces and the process of pulling out, can bear the bigger moment of torsion of appearance with the anti-slip function of assisting translational guide rail structure 200.Thereby; Under prerequisite with translational guide rail structure 200; If, can save the anti-slip structure, but under the situation of no translational guide rail structure 200 pulling out under the less situation of operating physical force; Described anti-slip structure needs, and causes the inconvenience and the reliability decrease of push operation to prevent year melt spare 2 from being pulled.

Referring to Fig. 1,3,5,9, the fuse of the utility model also comprises blown fuse indicator 7, and it both can be used to show whether melt 8 is installed when fuse is in "on" position, can show also whether melt 8 fuses.As shown in Figure 9, blown fuse indicator 7 comprises and is installed in the resistance 72, LED lamp 71, the contact chip that carry on the melt spare 2, is arranged on the display window 73 that carries on the melt spare 2.Described contact chip and resistance 72, LED lamp 71 are connected in series, and contact chip is in parallelly connected state with melt 8.During operate as normal, because of melt 8 intact short circuits in circuit, this moment, the LED lamp 71 was not worked; When melt 8 fusing, because of contact chip and the

fuse contact

6,9 that connects melt 8 is electrically connected, thereby make the circuit turn-on of blown fuse indicator 7, LED lamp 71 is bright, and can demonstrate the light of LED lamp 71 through display window 73, and the demonstration fuse moves.When melt 8 is not installed,,, also can make the LED lamp in the circuit of indicating device 7 bright, so that melt 8 not to be installed in the alert fuse because of contact chip and fuse contact are electrically connected if fuse is in "on" position.

Claims

1. fuse; Comprise melt (8), carry melt spare (2) and fuse base by what insulating material was processed; Carry melt spare (2) and be provided with the cavity of placing melt (8); The fuse moving contact is arranged on the both sides of this cavity; Carry melt spare (2) but be arranged on by (1) and cap (3) at the bottom of the shell and fasten in the cavity of the fuse base that constituted of being assembled together, be used for when operating personnel change melt (8) dismounting or insert melt (8) with the manual operation form, the both sides of fuse base be provided with can with carry the upward moving contact of the setting fixed contact (6,9) that contact and of melt spare (2) respectively with two fuse contacts (6; 9) binding post that is electrically connected with main circuit (4,5)

It is characterized in that:

Described fuse also comprises the rotation-Straight pull operating mechanism that is made up of semicircle pivot structure (100); Described semicircle pivot structure (100) comprises two protruding axles of semicircle (21) and the first circle straight trough (11) and the second circle straight trough (31); And the protruding axles of these two semicircles (21) are installed and are cooperated with the first circle straight trough (11), the second circle straight trough (31) respectively; Make that a year melt spare (2) is done following rotational motion with respect to fuse base or straight line moves; In the fuse closing operation stage, carry melt spare (2) with respect to the fuse base motion that can only rotate, can not translation; In the fuse sub-switching operation stage, carry melt spare (2) with respect to fuse base can to fuse pull out or the crossover position of push operation on realize rotating and straight line moves the mutual conversion between these two kinds of forms of motion; Pull out or the push operation stage at fuse, a year melt spare (2) can only be done straight line with respect to fuse base and move.

2. fuse; Comprise melt (8), carry melt spare (2) and fuse base by what insulating material was processed; Carry melt spare (2) and be provided with the cavity of placing melt (8); The fuse moving contact is arranged on the both sides of this cavity; Carry melt spare (2) but be arranged on by (1) and cap (3) at the bottom of the shell and fasten in the cavity of the fuse base that constituted of being assembled together, be used for when operating personnel change melt (8) dismounting or insert melt (8) with the manual operation form, the both sides of fuse base be provided with can with carry the upward moving contact of the setting fixed contact (6,9) that contact and of melt spare (2) respectively with two fuse contacts (6; 9) binding post that is electrically connected with main circuit (4,5)

It is characterized in that:

Described fuse also comprises rotation-Straight pull operating mechanism, and described rotation-Straight pull operating mechanism comprises semicircle pivot structure (100) and translational guide rail structure (200);

Described semicircle pivot structure (100) comprises two protruding axles of semicircle (21) and the first circle straight trough (11) and the second circle straight trough (31); Described translational guide rail structure (200) comprises two slide block convexities (24) and first guide-track groove (113), second guide-track groove (313), and first guide-track groove (113) laterally arranges with second guide-track groove (313); Two slide block convexities (24) respectively with first guide-track groove (113), second guide-track groove (313) between cooperate for being slidingly matched;

The protruding axles of two semicircles of this of described semicircle pivot structure (100) (21) are installed and are cooperated with the first circle straight trough (11), the second circle straight trough (31) respectively; And two slide block convexities (24) of described translational guide rail structure (200) are installed with first guide-track groove (113), second guide-track groove (313) respectively and are cooperated; Make that a year melt spare (2) is done following rotational motion with respect to fuse base or straight line moves; In the fuse closing operation stage; Two slide block convexities (24) are separated with first guide-track groove (113), second guide-track groove (313) respectively, make to carry melt spare (2) with respect to the fuse base motion that can only rotate, can not translation; In the fuse sub-switching operation stage; Two slide block convexities (24) get into the porch of first guide-track groove (113), second guide-track groove (313) respectively, make carry melt spare (2) with respect to fuse base can from the fuse separating brake to pulling out or the crossover position of push operation is realized rotating and straight line moves the mutual conversion between these two kinds of forms of motion; Pull out or the push operation stage at fuse, a constraint year melt spare (2) can only be done straight line with respect to fuse base and move; And it is consistent that the straight line of described semicircle pivot structure (100) constraint year melt spare (2) moves the moving direction that moves with the straight line of translational guide rail structure (200) constraint year melt spare (2).

3. fuse according to claim 1 and 2 is characterized in that:

The protruding axles of described two semicircles (21) are formed on and carry on the melt spare (2), and the first circle straight trough (11) and the second circle straight trough (31) are formed on the fuse base; In the protruding axle of perhaps described two semicircles 21 one is formed at the bottom of the shell of fuse base on (1), and another cap (3) that is formed on fuse base is gone up, the first circle straight trough (11) is respectively formed on year melt spare (2) with the second circle straight trough (31);

The described first circle straight trough (11) comprises first circular groove (111) and first straight trough (112); The radius R 1 of first circular groove (111) equals the width H1 of first straight trough (112); The medial surface of first straight trough (112) and the inner headed face of first circular groove (111) are tangent, and first straight trough (112) communicates with first circular groove (111);

The described second circle straight trough (31) comprises second circular groove (311) and second straight trough (312); The radius R 2 of second circular groove (311) equals the width H2 of second straight trough (312); The medial surface of second straight trough (312) and the inner headed face of second circular groove (311) are tangent, and second straight trough (312) communicates with second circular groove (311);

In the protruding axles of described two semicircles (21); The radius R A that the semicircle protruding axle (21) that cooperates is installed with the first circle straight trough (11) equates with the radius R 1 of first circular groove (111); The radius R B that the semicircle protruding axle (21) that cooperates is installed with the second circle straight trough (31) equates with the radius R 2 of second circular groove (311); The axle center of two protruding axles of semicircle (21) is concentric, and the center of circle of first circular groove (111) is concentric with the center of circle of second circular groove (311);

The first circle straight trough (11) is symmetrical set with the second circle straight trough (31); The protruding axle of two semicircles (21) respectively with first circular groove (111), second circular groove (311) between to cooperate be matched in clearance, two protruding axles of semicircle (21) respectively with first straight trough (112), second straight trough (312) between cooperate for being slidingly matched.

4. fuse according to claim 1 and 2 is characterized in that:

The protruding axles of described two semicircles (21) are identical semicylinder, and its cross sections shape is semicircle;

Each semicircle protruding axle (21) comprises the plane (212) and the arc surface (213) that are parallel to the protruding axle of this semicircle (21) axis, and said arc surface (213) is the semi-cylindrical of the semicylinder of semicircle protruding axle (21).

5. fuse according to claim 2 is characterized in that:

Two slide block convexities (24) of described translational guide rail structure (200) are formed on carries on the melt spare (2), and first guide-track groove (113) is formed at the bottom of the shell of fuse base on (1), and second guide-track groove (313) is formed on the cap (3) of fuse base; In the slide block of perhaps described translational guide rail structure (200) protruding (24) one is formed at the bottom of the shell of fuse base on (1); Another is formed on the cap (3) of fuse base, and first guide-track groove (113) and second guide-track groove (313) are respectively formed at and carry on the melt spare (2);

The porch of the lower end of described first guide-track groove (113) and second guide-track groove (313) respectively is tubaeform, is used to guide two slide block convexities (24) to get into first guide-track groove (113) and second guide-track groove (313) respectively;

The upper end of described first guide-track groove (113) and second guide-track groove (313) is used for preventing that respectively by (1) shutoff at the bottom of the shell of fuse base two slide block convexities (24) from pulling out from first guide-track groove (113) and second guide-track groove (313) respectively.

6. fuse according to claim 1 and 2; It is characterized in that: described fuse comprises that also preventing carrying melt spare (2) crosses the commentaries on classics location structure; The described anti-commentaries on classics location structure of crossing comprises the convexity (118) that is formed on (1) at the bottom of the shell and/or the cap (3), is formed on the convex shoulder (211) that carries on the melt spare (2); Carrying melt spare (2) when turning to closing position, described convexity (118) contact with convex shoulder (211), to limit year melt spare (2) inordinate rotation forward under "on" position.

7. fuse according to claim 1 and 2; It is characterized in that: described fuse also comprises anti-melt spare (2) the revolution location structure that carries; Described anti-revolution location structure comprises the flange (115) that is formed on (1) at the bottom of the shell and/or the cap (3), is formed on the boss (27) that carries on the melt spare (2); Carrying melt spare (2) when turning to closing position, boss (27) is blocked by flange (115), and it is free toward back rotation under "on" position to carry melt spare (2) with restriction.

8. fuse according to claim 1 and 2 is characterized in that:

Described fuse also comprises the guide plane (116) that is formed on (1) at the bottom of the shell and/or the cap (3), is formed on the guide surface (28) of carrying on the melt spare (2);

Described guide plane (116) is parallel to each other with the first circle straight trough (11), the second circle straight trough (31);

When a year melt spare (2) turns to the separating brake position, guide plane (116) and contact parallel with guide surface (28);

Carry that a melt spare (2) is pulled out or push-on process in, guide plane (116) contacts also slide relative with guide surface (28).

9. fuse according to claim 1 and 2 is characterized in that:

Described fuse also comprises the anticreep block (114) that is formed on (1) at the bottom of the shell and/or the cap (3), is formed on the anticreep boss (26) that carries on the melt spare (2);

When carrying melt spare (2) when being pulled out to maximum pull-out location, anticreep boss (26) is blocked by anticreep block (114), is not pulled so that carry melt spare (2).

10. fuse according to claim 1 and 2 is characterized in that:

The taper type that the cavity of described year melt spare (2) becomes opening to enlarge, the said cavity or in cavity, take out so that melt (8) is packed into easily;

The cavity hatch place of described year melt spare (2) is provided with a melt block (22), freely comes off in said cavity in order to prevent melt (8).

11. fuse according to claim 1 and 2; It is characterized in that: also comprise being arranged on the blown fuse indicator (7) that carries on the melt spare (2); It comprises resistance (72), LED lamp (71), contact chip and the display window (73) that is installed on year melt spare (2); Described contact chip and resistance (72), LED lamp (71) are connected in series, and contact chip is in parallelly connected state with melt (8).