CN1037794C - A circuit breaker - Google Patents
A circuit breaker Download PDFInfo
- Publication number
- CN1037794C CN1037794C CN94117833A CN94117833A CN1037794C CN 1037794 C CN1037794 C CN 1037794C CN 94117833 A CN94117833 A CN 94117833A CN 94117833 A CN94117833 A CN 94117833A CN 1037794 C CN1037794 C CN 1037794C
- Authority
- CN
- China
- Prior art keywords
- contact
- coil
- circuit breaker
- yoke
- run
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/346—Details concerning the arc formation chamber
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
A circuit breaker comprises first and second breaker contacts disposed in a main current path. An electromagnetic release device is provided to forcibly disengage the second contact from the first contact upon detection of an excess current flowing through the main current path. The release device comprises a coil and a plunger magnetically connected to the coil through a yoke having a base member and a pair of side members. A pair of arc runners are disposed to guide an arc, in a direction away from the breaker contacts. The first arc runner extends away therefrom to give an extension , while the second arc runner is defined by the base member of the yoke. The yoke is electrically connected to the second contact at the side member adjacent to the second contact. The component numbers can be reduced.
Description
The present invention relates to a kind of tie breaker of when the super-high-current circulation is arranged in the main circuit that is fitted with the circuit breaker contact, forcing to make the disconnection of circuit breaker contact.
In existing this tie breaker, in order to eliminate the electric arc that when having super-high-current to flow through the circuit breaker contact in the main circuit that is fitted with the circuit breaker contact to be forced to disconnect, produces, be provided with a kind of with the lead device of arc-extinction device of electric arc, promptly at two contacts (travelling contact and fixed contacts constituting the circuit breaker contact, perhaps a pair of travelling contact) is electrically connected run-on tab on, make the circuit breaker contact disconnect the electric arc that produces and move, make the contact of electric arc away from circuit breaker along two run-on tabs.
In addition, in main circuit, be fitted with the coil of electromagnetic release device, when having super-high-current to flow through in this coil, be located at the interior plunger of coil, the contact of circuit breaker is disconnected owing to magneticaction moves.That is to say, be provided with a kind of opening and closing device that can keep accumulating the state that the spring force that makes the disconnection of circuit breaker contact is arranged,, that is, the circuit breaker contact is disconnected by the spring force that discharges opening and closing device in case the iron core of electromagnetic release device moves.In addition, for magnetic force is worked to the plunger that is located in the coil effectively, be provided with yoke (yoke) at electromagnetic release device, this yoke has the lateral plate of a pair of axial both ends of the surface towards coil and the intermediate that outside at coil links two lateral plates.
The tie breaker of above-mentioned traditional structure because its electromagnetic release device and run-on tab are provided with respectively, increases so can cause number of components.
The present invention is a purpose to address the above problem, to provide a kind of tie breaker that can reduce number of components.
Tie breaker of the present invention has the circuit breaker contact on the main circuit that is connected between power supply side terminal and the load side terminal, and this circuit breaker contact 1 is made of contact and the 2nd contact.Be provided with detect have super-high-current to flow through in the above-mentioned main circuit and the 2nd contact from the mandatory electromagnetic release device that draws back of the 1st contact, this electromagnetic release device has coil that is inserted in the above-mentioned main circuit and the plunger that is inserted in this coil, when having super-high-current to flow through in the coil, the magnetic force that is produced by coil makes plunger move to a direction, because the mobile of plunger makes two circuit breaker contacts disconnected from each other, above-mentioned plunger is through yoke and above-mentioned coil magnetic coupling, and described yoke forms roughly U word shape by intermediate and 2 lateral plates that are positioned at its two ends.Be provided with a pair of run-on tab, the electric arc that it takes place between the 1st and the 2nd contact when above-mentioned circuit breaker contact is separated, the electromagnetic force in the magnetic field of arc current generation is followed in utilization, move to direction away from contact, the 1st run-on tab and above-mentioned the 1st contact are electrically connected and have the extension that extends to away from this contact direction, and the 2nd run-on tab and above-mentioned the 2nd contact are electrically connected and extend towards the direction away from this contact.Characteristic of the present invention is, above-mentioned yoke is electrically connected by its lateral plate and above-mentioned the 2nd contact near the circuit breaker contact, the intermediate of above-mentioned yoke and above-mentioned another relative configuration of extension of run-on tab are determined above-mentioned the 2nd run-on tab by this intermediate itself.By this structure, if an end of electric arc moves to the pars intermedia of yoke, can flow through reverse arc current mutually in the intermediate of run-on tab and yoke, and can make electromagnetic force act on electric arc, so that electric arc is moved towards the direction away from the circuit breaker contact.That is to say that the intermediate of yoke has the function of run-on tab, a pair of run-on tab needn't be set as before, can be by being located at double another run-on tab of doing of yoke on the electromagnetic release device.As a result, compare with the formation in past, few run-on tab can reduce number of components.
Secondly, above-mentioned coil winding is in the periphery of the coil tube of insulating material, the flange of electric insulating quality that is located at an axial end of above-mentioned coil tube be configured in two lateral plates of yoke between circuit breaker contact lateral plate and coil far away.Adopt this formation, can guarantee to prevent from reliably electric arc to be moved in the opposite direction towards the side with hope owing to producing short circuit between them from circuit breaker contact lateral plate far away and the insulation between the coil.
Have, above-mentioned coil is centered around the periphery of the iron core part that comprises above-mentioned plunger again, is formed with the maintenance groove at the both ends that can embed this iron core part on each lateral plate of above-mentioned yoke.Above-mentioned maintenance groove is in the peripheral openings of each lateral plate, and the maintenance tab that stretches out in the medial surface of circuit breaker case 10 embeds above-mentioned maintenance groove, and keep each end of clamping iron core part between the inner periphery of groove.Like this, owing to keep the peripheral openings of groove towards each lateral plate, the iron core part yoke of packing into easily, and, the yoke position is fixed on the case after keeping tab to embed the maintenance groove, so the fixed-site of the fixed-site of core portion and yoke is carried out easily, assembling operation is simplified.
Have again, be formed with the internal diameter thin head littler than pars intermedia in an axial end of above-mentioned coil tube, above-mentioned plunger have diameter than the internal diameter of above-mentioned thin head the big and part littler than the internal diameter of pars intermedia, plunger is being housed in the coil tube moving axially freely.Axial the other end at coil tube is fixed with fixed iron core, between fixed iron core and plunger, establish back-moving spring, the part of fixed iron core is outstanding from coil tube, one end of coil tube is fixed on another lateral plate of yoke, and fixed iron core is by its protuberance and another lateral plate magnetic coupling of yoke.Therefore, plunger and fixed iron core and back-moving spring can be installed in coil tube, can easily assemble electromagnetic release device, and, because the outstanding lateral plate magnetic coupling with yoke of a part that makes fixed iron core from coil tube, so can be reduced in the magnetic resistance of the magnetic circuit that forms in yoke, fixed iron core and the plunger, the result can be with strong gravitational attraction plunger.
Have, in the present invention, two electroplax movable plates are housed in the space between circuit breaker case two side again, and the width between the two side in above-mentioned space is along the direction of advance expansion of electric arc.Promptly, structurally, the mutual distance in two side in the space of accommodating run-on tab is expanded towards the direction of the electromagnetic force that acts on electric arc, make the position height that is distributed in close circuit breaker contact of the pressure of arcing gas, and the direction that moves along with electric arc reduces, and arcing gas is flowed towards the electric arc moving direction.In other words, because flowing of arcing gas can promote moving of electric arc, promptly eliminate electroplax.The result who does like this, near the side plate that backflows of the ceramic that disposes separately contact in tie breaker does not in the past just need, and can reduce number of components.
Have again,,,, can reduce in the degree of the position deterioration that becomes shade even because arc heat makes sidewall generation deterioration so see from the circuit breaker contact and can produce the part that electric arc is formed shade because on the biside plate of run-on tab, be provided with stair-stepping concavo-convexly.Promptly can reduce the deterioration of sidewall.
Have again, for run-on tab, because formed the rake that the increase phase mutual edge distance along with the distance of leaving the circuit breaker contact can enlarge, so arc voltage is risen because of electric arc is elongated gradually, make the extinguishing arc transfiguration of electric arc easy, the same with the distance that enlarges between sidewall simultaneously, form a kind of arcing gas to the pressure distribution that the direction away from contact flows, can quicken moving of electric arc.
The simple declaration of accompanying drawing:
Fig. 1 is the exploded perspective view of the tie breaker of one embodiment of the invention;
Fig. 2 is the exploded perspective view that the internal structure of above-mentioned tie breaker is shown;
Fig. 3 is the stereogram of above-mentioned tie breaker;
Fig. 4 and Fig. 5 are the major part profiles of the installation position of used yoke of the above-mentioned tie breaker of diagram and circuit breaker case;
Fig. 6 is the cutaway view that above-mentioned tie breaker closure state is shown;
Fig. 7 is the cutaway view that above-mentioned tie breaker off-state is shown;
Fig. 8 is the cutaway view that the tripped condition of above-mentioned circuit breaker is shown;
Fig. 9 is illustrated in the sectional elevation that holds the space of run-on tab in the above-mentioned tie breaker;
Figure 10 is illustrated in the sectional elevation that holds the space of run-on tab in the tie breaker of other embodiments of the invention.
Below present invention will be described in detail with reference to the accompanying.
As shown in Figure 1, tie breaker of the present invention has the case 10 with the synthetic resin material system of electric insulating quality, partly is respectively equipped with the load side terminal 20b of power supply side terminal 20a in each side of case 10.On power supply side terminal 20a, electric property is connecting the terminal board 21a that is equipped with fixed contact 31 (with reference to Fig. 2), on load side terminal 20b, electric property is connecting terminal board 21b, and this terminal board 21b goes up affixed an end that constitutes the bimetallic 61 of the moving releasing device 60 of heat.The travelling contact 32 of fixed contact 31 on being located at movable contact 33 constitutes the circuit breaker contact, movable contact 33 separates with fixed contact 31 according to the action of opening and closing device 40 described later or contacts, the connecting line 37 of movable contact 33 by forming by classification track, be electrically connected with an end of the coil 51 of electromagnetic release device 50 described later, the other end of coil 51 is connected in the pars intermedia of bimetallic 61 by the connecting line of being made up of classification track 38.Therefore,---circuit breaker contact---this path of coil 51---bimetallic 61---load side terminal 20b, the main circuit of formation current flowing during the tie breaker junction closure, by power supply side terminal 20a.In the present invention, bimetallic 61 both can use oneself heating to cause crooked direct-heating-type, also can use folded the causing together of plate heater to cause the crooked pattern of fever that is close to by heater heats.
Handle and connecting rod 45, stop (latch) plate 46 and contact connecting rod 48 that opening and closing device by dropout plate 44, roughly is the U font constitute, and are located at axle shape projection 41d on the handle 41 and are inserted in the dead eye 45a that the top ends of each pin sheet of handle and connecting rod 45 forms.Check plate 46 ends plate 46a by flat card and a pair of prerotation vane 46b that stretches out parallel to each other from its two ends constitutes, and Handle axis 42 is inserted in the axis hole 46c that the top ends of prerotation vane 46b forms.Dropout plate 44 props up on case 10 by pivot pin 47 pivots, and the both ends of pivot pin 47 are inserted in the bearing 15 that forms on the medial surface of cover body 10a and lid 10b.Contact connecting rod 48 forms and roughly is the U font, and an one pin sheet 48a is punctured into by the pilot hole 46d that forms on two prerotation vane 46b of check plate 46 in the tie rod holes 45c on the base portion of the bipod sheet that is located at handle and connecting rod 45.Another pin sheet 48b of contact connecting rod 48 interts in the axis hole 33a on being located at movable contact 33.Be formed with the gathering sill 16 of the bowing of bottom's protrusion shown in Figure 2 on the medial surface of cover body 10a, the top ends of the pin sheet 48b of contact connecting rod 48 is inserted in this gathering sill 16, so the moving range of contact connecting rod 48 is subjected to gathering sill 16 restrictions.
Check plate 46 can freely rotate relative to case 10 with handle together by Handle axis 42, but, owing to intert in the pin sheet 48a of the contact connecting rod 48 on the handle and connecting rod 45 interts pilot hole 46d at check plate 46, and handle and connecting rod 45 is being supported by the axle shape projection 41d of handle 41, so check plate is restricted the hunting range of handle 41.Simultaneously, the lower limb of the hooking sheet 46a of check plate 46 can fasten with the hook groove 44e that is located on the dropout plate 44, and the mobile of check plate 46 is under an embargo under fastening state.
As mentioned above, the opening and closing device 40 that constitutes by handle 41, Handle axis 42, handle back-moving spring 43, dropout plate 44, handle and connecting rod 45, stop connecting rod 46, pivot pin 47, contact connecting rod 48, be in closure state at the circuit breaker contact, when main circuit has super-high-current to pass through, action by electromagnetic release device 50 and the moving releasing device 60 of heat disconnects the circuit breaker contact.
Be equipped with the plunger that axially can move freely 54 at coil tube 53 in the inner space of coil tube 53, it has the diameter part bigger than the internal diameter of thin head 53b, and in the end of the flange 53a of coil tube 53 side, being relatively fixed with plunger 54 unshakable in one's determination 55 is installed on the coil tube 53 its part highlightedly from coil tube 53.On an end face of the moving direction of plunger 54, be provided with the hook pin 54a that stretches out from the end face of the thin head 53b side of coil tube 53 with being integral; On another end face, fixing and passing the pushing pin 57 that stretch out from the end face of the flange 53a side of coil tube 53 fixed iron core 55 back.Top ends at hook pin 54a forms the diameter hook head 54b bigger than other positions.The back-moving spring 56 that is made of helical spring is installed between plunger 54 and fixed iron core 55, and by the spring force of back-moving spring 56, plunger 54 is subjected to towards the active force of thin head 53b one side of coil tube 53.
The both ends diameter of the moving direction of plunger 54 is less than the diameter of pars intermedia, the one end is the 53c of spring base portion that is inserted in the back-moving spring 56, its the other end forms the shape in the thin head 53b that can be inserted into coil portion 53, and the diameter of pars intermedia is greater than the internal diameter of thin head.That is to say, in plunger 54, giving prominence between the path part and large-diameter portion branch that is provided with hook pin 54a, be formed with anticreep stage portion 54d, in the interior week of coil tube 53, on the stage portion that only is to form between pars intermedia and the thin head 53b by anticreep stage portion 54d card, can prevent that plunger 54 from coming off.
Fixed iron core 55, an end of the close plunger 53 that its coil tube 53 is axial forms the diameter littler than other positions, becomes the 55a of spring base portion that is inserted in the back-moving spring 56, and the outer blade of a sword sheet 55b bigger than other position diameters is set in the other end.Give prominence at the central portion of the above-mentioned other end again and be provided with in conjunction with protruding 55c.Like this, as if the flange 53a side that secured core 55 is inserted into coil tube 53, the end face of then outer blade of a sword sheet 55b and coil tube 53 connects, and can protrude in coil tube 53 in conjunction with protruding 55c.
As mentioned above, the iron core part that plunger 54, fixed iron core 55, back-moving spring 56 back formation are installed on coil tube 53 is installed on the yoke 52 in order to following method, promptly, the thin head 53b of coil tube 53 is embedded in the maintenance groove 52d on the lateral plate 52a that is located at yoke 52, and the protruding 55c of the combination of fixed iron core 55 is embedded into installs in the maintenance groove 52e that is located on the lateral plate 52b.Here, by between the lateral plate 52b of coil 51 and yoke 52, sandwiching the flange 53a of coil tube 53, just can guarantee the insulation between the lateral plate 52b of coil 51 and yoke 52.In addition, by being embedded in conjunction with protruding 55c in the maintenance groove 52e on the lateral plate 52b that is located at yoke 52, and outer blade of a sword sheet 55b is clipped between the flange 53a and lateral plate 52b of coil tube 53 55 pairs of yoke 52 magnetic couplings of fixed iron core.
More than the electromagnetic release device 50 of Gou Chenging as Fig. 4 and shown in Figure 5, by outstanding maintenance lug 17a, the 17b that is arranged on the medial surface of cover body 10a is embedded in maintenance groove 52d, the 52e that is located on the yoke 52, is fixed on the certain position of cover body 10a.In addition, yoke 52 mounting groove 18a, the 18b tabling of lateral plate 52a, 52b by making yoke 52 and near formation maintenance lug 17a, the 17b of the medial surface of cover body 10a, yoke 52 also can be fixed on the cover body 10a.Under the state that yoke 52 is fixed on the cover body 10a, the thin head 53 of coil tube 53 and fixed iron core 55 be clamped in the inner peripheral that keeps groove 52d, 52e respectively and between the tip edge that keeps lug 17a, 17b, coil tube 52 relative yokes 52 are fixed on certain position in conjunction with projection 55c.
The electromagnetic release device 50 of above-mentioned formation, to coil 51 energisings the time, attractive effect between plunger 54 and fixed iron core 55, the magnetic resistance of the magnetic circuit of plunger 54 reduces to make by fixed iron core 55---yoke 52---, when the electric current that feeds coil 51 is the load short circuit during such super-high-current, the spring force that plunger 54 overcomes back-moving spring 56 is moved, and is close to fixed iron core 55.Therefore, when moving like this, can disconnect the circuit breaker contact that is in closure state forcibly by controlled opening/closing apparatus 40, as follows with the combining form of opening and closing device.
The top ends that is located at the hook pin 54a in the plunger 54 is passed the axis hole 33a that is located at movable contact 33 and the hook hole 33e between the travelling contact 32, when because coil 51 excitatory, plunger 54 be attracted to fixed iron core 55 near the time, the hook head 54b that is located at the top ends of hook pin 54a is blocked by the periphery of hook hole 33e, and movable contact 33 is pulled away from fixed contact 33.Here, hook hole 33e forms the slotted hole that is made of continuously mutually the diameter entrance hole bigger than hook head 54b than little stop hole of hook head 54b and diameter, when assembling, in stop hole, import hook pin 54a after in entrance hole, leading to into hook head 54b, electromagnetic release device 50 is combined with movable contact 33.And the top that is fixed on the pushing pin 57 in the plunger 54 is positioned at the relative position of the 2nd push-pads 44c with dropout plate 44.Plunger 54 is fixed and unshakable in one's determination 55 attracts and when mobile, dropout plate 44 is rotated around pivot pin 47 to the dextrorotation direction of Fig. 2.
On the other hand, the moving releasing device 60 of heat is equipped with bimetal leaf 61, and an end of bimetal leaf 61 is fixed on the terminal board 21b, and the other end is provided with set screw 62.Set screw 62 is relative with the 1st push-pads 44b of dropout plate 44, when having super-high-current to flow through in the main circuit, when bimetal leaf bends, because the top ends of set screw 62 pushes dropout plate 44, making dropout plate 44 around the right-hand rotation of pivot pin 47 to Fig. 2.
In the perisporium of case 10, near the set screw 62 of bimetal leaf 61 upper ends, offered and regulated with window 63, regulate to be provided with the insertion section 63a wideer than other positions in the end thereon with window 63, adjusting forms downward-sloping spigot surface 63b with the top edge of window 63 towards the inboard of case 10.As shown in Figure 6, on the two sides of regulating with window, be formed with the mounting groove 63c that the upper end is continuous mutually with insertion section 63a, the lower end of window 63 is used in the lower end until adjusting.Promptly, regulating with on the two sides of window 63, lateral surface side at case 10, under the situation that keeps insertion section 63a, formation is until the guiding rib 63d that regulates with window 63 lower ends, in the medial surface side of case 10,, so just can between two guiding rib 63d, 63e, form mounting groove 63c regulating with forming guiding rib 63e on the total length up and down of window 63.
Because 61 pairs of degree of crook by electric current of bimetal leaf (action sensitivity) are different variations the with link position of the deviation of the material of bimetal leaf 61 and connecting line 38 etc., so for the action sensitivity that makes opening and closing device 40 (promptly, main circuit during opening and closing device 40 action pass through electric current) deviation does not take place, need to regulate twist the set screw 62 that is combined on the bimetal leaf 61 from bimetal leaf 61 to the side-prominent amount of dropout plate 44.Here after assembling, make adjusting be in open state and allot set screw 62 again with window 63.On the other hand, because in case no longer need to allot set screw 62 after regulating set screw 62, so, can make and have flexible inaccessible plate 64 and enter in the mounting groove 63c by insertion section 63a, live to regulate with inaccessible plate 64 is inaccessible, can prevent the careless inside that set screw 62 and foreign matter enter into case 10 of stirring with windows 63.Inaccessible plate 64 is set to be approximately equal to and regulates with the width (distance between the bottom of mounting groove 63c) of window 63 and the height dimension that is approximately equal to the above-below direction of regulating usefulness window 63.If so inaccessible plate is inserted into adjusting with in the window 63, close the upper end of stockaded village's plate 64 and just in time run into the upper side of regulating with window 63, just can not take off inaccessible plate 64.
As shown in Figure 2, power supply side terminal 20a and load side terminal 20b have: terminal part 22a, 22b that the bending of conductive metal plate forms, be located at holding screw 23a, 23b on the terminal part, and with the contacted terminal board 21a in the lower end of holding screw, 21b.The terminal part be housed in be located at case 10, horizontal profile is that portion can move up and down within it in terminal accommodating chamber 24a, the 24b of rectangle.That is, terminal part 22a, 22b can not rotate in terminal accommodating chamber 24a, 24b, can only move at above-below direction.The head of holding screw 23a, 23b forms the upper diameter circular cone shape littler than the bottom, upper wall at terminal accommodating chamber 24a, 24b is provided with screw handle hole 25a, 25b, this hole 25a, 25b have the part of the head that can insert holding screw but the head unpassable diameter of holding screw 23.The screw handle hole is set at, and upper part diameter is less than the upper end of the head of holding screw 23, and lower diameter is greater than the lower end of the head of holding screw 23.The top ends of terminal board 21a, 21b is exposed to the lateral surface and the bending upward of case 10, by fixedly tab 21c that forms in the top ends of terminal board 21a, 21b and the holddown groove 26 that forms are fastened, prevented the moving up and down of top ends of terminal board 21a, 21b on the lateral surface of case 10.Have again, on the sidewall of terminal accommodating chamber 24a, the 24b of the inner space of separating terminal accommodating chamber 24a, 24b and case 10, the terminal board that is formed with the position of determining terminal board 21a, 21b keeps groove 27, in terminal board keeps groove 27, insert the part of terminal board 21a, 21b, also can prevent moving up and down of terminal board 21a, 21b with this.That is, in terminal board 21a, 21b, prevented to move up and down, so even there is external force to act on holding screw 23, terminal board 21a, 21b still can be fixed on certain position in both sides with holding screw 23 contacted positions.Here, the distance of the upper wall of terminal board 21a, 21b and terminal accommodating chamber 24a, 24b is set at the length dimension that is approximately equal to holding screw 23.
The top ends of manifold screwdriver is inserted in screw handle hole 25a, the 25b, when rotating holding screw 23a, 23b, therefore rotation direction terminal part 22a, 22b by holding screw can move up and down, and can change the distance between following of the terminal part and terminal board 21a, 21b.In more detail, on the perisporium of case 10, corresponding with lower wall and the position between terminal board 21a, the 21b of terminal accommodating chamber 24a, 24b, be equipped with and connect with hole 28, distribution components such as electric wire and bus are inserted is connected, rotate following close terminal board 21a, 21b that holding screw makes the terminal part, by such operation with in the hole 28, distribution component is clipped between terminal part and terminal board 21a, the 21b, just can be electrically connected with distribution component.
The terminal board 21a that constitutes power supply terminal 20a has than the reclinate fixed contact plate 39 of terminal board maintenance groove 27 in the inside of case 10, and fixed contact 31 is fixed on the lower end of fixed contact plate 39.The travelling contact 32 that is provided with on the movable contact 33 is relative with fixed contact 31.On fixed contact plate 39, outstanding being provided with on the face of fixed contact 31 in the lower part of fixed contact 31, the part of overlapping the run-on tab of making by conductive plate 71.Run-on tab 71 has the prerotation vane 71a of the above-below direction of its part and 39 repetitions of fixed contact plate, the oblique plate 71b of the lower end of prerotation vane 71a by tilting to oblique below, the muffler 71c at place, below that always extends to the intermediate 52c of yoke 52 with diapire along case 10 links to each other.Configuration extinguishing arc grid 72 between the intermediate of yoke 52 52c's and muffler 71c's relative position.Extinguishing arc grid 72 is being supported the polylith muffler plate 74 of the mutual almost parallel made by conductive plate in the inboard of the support plate of being made by insulating material that roughly is the コ font 73, be formed with the notch 74a of the bottom that can import movable contact 33 on each muffler plate 74.In configuration during this extinguishing arc grid 72, muffler plate 74 will with the muffler 71c of the intermediate 52b of yoke 52 and run-on tab 71 keeping parallelism roughly.The muffler 71c of run-on tab 71 is along with leaving oblique plate 71b, and its width enlarges stage by stage.
In case as shown in Figure 8, travelling contact 32 leaves fixed contact 31 and produces electric arc, because because of electric current flows through magnetic field that terminal board 21a and movable contact 33 produce around and by the electromagnetic force of arc current generation, electric arc moves to the below of figure, and an end of electric arc is carried on run-on tab 71 moving close to the arc chute Ghandler motion.Promptly, because the fixed contact plate 39 that is located on the terminal board 21a is relative with movable contact 33, and flow through mutually reverse electric current in fixed contact plate 39 and the movable contact 33, so electric arc is subjected to being drawn back from fixed contact plate 39 and movable contact 33 effect of the electromagnetic force of this direction.As a result, move to run-on tab 71 end of fixed contact plate 39 sides in the electric arc, is directed on the extinguishing arc grid 72.And, because on movable contact 33, be formed with striking sheet 33d, so the other end of electric arc can be moved towards the top orientation of striking sheet 33d.Like this, electric arc will be directed on the extinguishing arc grid 72 gradually, is elongated simultaneously.
But the part of the connecting line 37 that an end of movable contact 33 and coil 51 is coupled together is welded on yoke 52 near on the lateral plate 52a at circuit breaker contact place.Therefore, one end of electric arc is when run-on tab 71 is directed into extinguishing arc grid 72, the B of the other end meeting image pattern 8 of electric arc is such,---the lateral plate 52a of yoke 52---connecting line 37---coil 51 these path circulations that move on the intermediate 52c of yoke 52 from the striking sheet 33d of movable contact 33, electric current is along the intermediate 52c of yoke 52.Because the electric current in this sense of current and the run-on tab 71 is just in time reverse since in the intermediate 52c of yoke 52 and run-on tab 71 the mobile magnetic field that electric current produced, electric arc can be subjected to the effect of electromagnetic force, is directed in the extinguishing arc grid 72.That is to say, the intermediate 52b of yoke 52 can play a part to form magnetic circuit in electromagnetic release device 50, can cooperate with run-on tab 71 again, works to eliminate electric arc, compare with the situation of establishing a pair of run-on tab, can reduce parts, simplified structure and can cause reducing cost.
In case 10, on the two side that holds run-on tab 71 positions, as shown in Figure 9, form a mobile promotion face 19 that tilts to make the phase mutual edge distance to enlarge along with leaving the circuit breaker contact.And, clip the circuit breaker contact and be in the wall of an opposite side by obturation with extinguishing arc grid 72.Therefore, if the circuit breaker contact separates when producing electric arc, the pressure distribution of arcing gas is shown in Fig. 9 dotted line, and is the highest near the circuit breaker contact, near step-down extinguishing arc grid 72.As a result, arcing gas can flow towards extinguishing arc grid 72, because the flow direction of the moving direction of electric arc and arcing gas is consistent, so electric arc is promptly imported in the extinguishing arc grid 72.
As Fig. 3 finding, below case 10, be provided with an attachment rail (so-called DIN track) 80 that is located at distributor cap inside etc. relatively and can load and unload freely the fixedly erecting device of usefulness.Attachment rail 80 sections are the U font, and are provided with the tip edge that total length reaches the bipod sheet, outside blade of a sword sheet 80a.Below case 10, be formed with recessed place 81 is installed, on the sidewall that recessed place 81 is installed, be provided with card and end projection 82, between the inner bottom surface at this projection 82 and the recessed place 81 of installation, can insert a blade of a sword sheet 80a of attachment rail 80.And,, in this through hole 83, be fitted with slide block 84 in that the through hole 83 that is provided with the lateral surface that extends through case 10 on the another side at recessed place 81 is installed always.Slide block 84 has an end from the outstanding rectangular box-like 84a of frame portion of the lateral surface of case 10, has in the other end to reach the claw 84b that installs in the recessed place 8, and being provided with on the 84a of frame portion in an end of claw 84b side is free-ended spring leaf 84c.Be formed with retainer 84d with V font groove on the top of spring leaf 84c, end on the stage portion that forms on the inner peripheral surface of through hole 83 (not shown) by the retainer card, can slide block be remained on to allow claw 84b reach to install the tight lock position in the recessed place 8, perhaps from the recessed unlocked position that retreats is installed.On tight lock position, clip another blade of a sword sheet 80a of attachment rail 80 between the inner bottom surface at claw 84b and the recessed place 81 of installation, tie breaker is fixed on the attachment rail.On the other hand, if will unload case 10 from attachment rail 80, can be inserted into top ends of manifold screwdriver etc. in the 84a of frame portion that stretches out outside case 10 sides, slide block 84 is pulled out in case 10, claw 84 just is disengaged with the fastening state of the blade of a sword sheet 80a of attachment rail 80 like this, just can unload case 10 down from attachment rail 80.
The below action of explanation tie breaker.Fig. 6 illustrates the circuit breaker contact and is in closure state (ON), makes the thorny arbor 42 of operating portion 41a of handle 41 pour into right-hand.At this moment, dropout plate 44 is owing to the spring force of handle back-moving spring 43 is subjected to around the active force of pivot pin 47 to the left rotation of Fig. 6, and the 1st push-pads 44b keeps the butt states with the set screw 61 that is located on the bimetal leaf 61.And, by movable contact 33 and contact connecting rod 48, the spring force that connects pressing spring 34 affacts on the check plate 46, distance between the axle shape projection 41d on the pin sheet 48a of contact connecting rod 48 and the Handle axis 41 is being subjected to the restriction of handle connecting rod 45, so check plate 46 is subjected to connecing the spring force of pressing spring 34, having with Handle axis 42 is the potential energy that the center turns left.Therefore, the hooking sheet 46a of keep plate 46 can fasten with the fastening groove 44e on the transverse arm sheet 44d that is located at dropout plate 44.That is to say that check plate 46 will rotate to left, but, rotate and forbidden, so keep the state of Fig. 6 because dropout plate 44 is arranged.Under this state, check plate 46 is because Handle axis 42 and dropout plate 44 its positions are fixed, and handle and connecting rod 45 and contact connecting rod 48 also are fixed on certain position.As a result, movable contact 33 is the center owing to the spring force that connects pressing spring 34 is subjected to pin sheet 48b with contact connecting rod 48, to the active force that left rotates, and travelling contact 32 is to contact with fixed contact 31 with the corresponding contact pressure of the spring force that connects pressing spring 34.The position relation that is located at scotch 36 and movable contact 33 on the medial surface of case 10 is set at, and at this state, the spring seat slice 33b of movable contact 33 can not contact with scotch 36.
On the other hand, as shown in Figure 7, the thorny arbor 42 of the operating portion 41a of handle 41 is rotated and pour into left to the time, the circuit breaker contact is in off-state (OFF).That is to say,, the upper end of handle and connecting rod 45 is moved to right-hand, desire the pin sheet 48a of contact connecting rod 48 is lifted upward because handle 41 thorny arbors 42 are rotated to left.; if the position of the outstanding 41d of axle shape moves to the right side of the straight line that connects Handle axis 42 and pin sheet 48a; then the spring force that connects pressing spring 34 that acts on the handle and connecting rod 45 by movable contact 33 and contact connecting rod 48 can the generation effect; handle 41 is further turned left, and the pin sheet 48b of contact connecting rod 48 along gathering sill 16 left direction move.Like this and since the pin sheet 48b of contact connecting rod 48 left direction move, the spring seat slice 33b of movable contact 33 is because of the effect of the spring force that connects pressing spring 34, understands with scotch 36 on the inner peripheral surface that is located at case 10 to contact.At this moment, the spring force that connects pressing spring 34 acts on the more below of scotch 36 lower ends, so the active force that movable contact 33 is turned left, travelling contact 32 just leaves from fixed contact 31.In addition, when the circuit breaker contact was in off-state, check plate 46 was subjected to the restriction of the pin sheet 48a of handle and connecting rod 45 and contact connecting rod 48, was that rotate to left at the center with Handle axis 42, threw off from the dropout plate.
But, when being in closure state shown in Figure 6, if overload state occurs, there is super-high-current to flow through in the bimetal leaf 61, the words that bimetal leaf 61 bends, the 1st push-pads 44b of dropout plate 44 can be subjected to twisting the pushing that is combined in the set screw 62 on the bimetal leaf 61, if have super-high-current to flow through in the coils such as short circuit 51 because of load side, plunger 54 is fixed and unshakable in one's determination 55 attracts, the 2nd push-pads 44c of dropout plate 44 can be subjected to being fixed on the pushing of the pushing pin 57 in the plunger, no matter which kind of situation, dropout plate 44 shown in all can image pattern 8 like that, be that the center turns right with pivot pin 47.Dropout plate 44 is disengaged with the fastening state of check plate 46 when right-hand rotation, and under closure state, check plate 46 is subjected to the active force that thorny arbor 42 turns left because of the spring force that connects pressing spring 34, thus the bottom of check plate 46 left direction move.That is to say, under closure state, the pin sheet 48b of because the center of rotation of movable contact 33---contact connecting rod 48 moves to left along gathering sill 16, so it is the same with off-state shown in Figure 7, because of connecing the spring force of pressing spring 34, movable contact 33 is pushed on the scotch 36, and travelling contact 32 leaves fixed contact 31 and forms off-state.That is to say,,, be disengaged, carry out so-called tripping operation action, make the disconnection of circuit breaker contact because the potential energy of savings on check plate 46 is released with the fastening state of check plate 46 because dropout plate 44 rotates in case in main circuit, there is super-high-current to flow through.
In embodiment 1, be on the sidewall in the space that holds run-on tab 71, to form smooth mobile promotion face 19, in the present embodiment, as shown in figure 10, be on mobile promotion face 19, to form step-like concavo-convex 19a.Step-like as if so mobile promotion face 19 being formed, the irradiation that the part of mobile promotion face 19 is subjected to electric arc can reduce, even if because arc heat makes mobile promotion face 19 produce deterioration, can alleviate by the degree of the few position deterioration of electric arc irradiation.That is to say, compare, can alleviate the degradation of mobile promotion face 19 integral body, prolong the life-span of mobile promotion face 19 with the structure of embodiment 1.Other structure and action, identical with embodiment 1, so explanation is omitted.
Claims (8)
1. tie breaker comprises as the lower part:
Circuit breaker contact (31), (32) on a pair of main circuit that is connected between power supply side terminal (20a) and the load side terminal (20b), this circuit breaker contact is by first contact (31) and the 2nd contact (32);
One detect super-high-current circulation is arranged in the above-mentioned main circuit after, forcibly the 2nd contact (32) is pulled away from the 1st contact (31), this electromagnetic release device has and is inserted in the coil (51) in the above-mentioned main circuit and is inserted in the interior plunger (54) of coil (51), the magnetic force that produces owing to coil when the super-high-current circulation is arranged in coil makes post plunger (54) move to a direction, because the mobile circuit breaker contact (31) of opening of plunger, (32), above-mentioned plunger is by yoke (52) and above-mentioned coil magnetic coupling, and described yoke (52) is by intermediate (52c) and be positioned at two lateral plates (52a) at its two ends, (52b) form roughly U word shape;
A pair of run-on tab (71), (52c) that the electric arc that takes place between the 1st and the 2nd contact (31), (32) is moved towards the direction away from contact because of the electromagnetic force in the magnetic field of following the arc current generation, the 1st run-on tab (71) and described the 1st contact be electric to join and has the extension (71c) that extends to away from this contact direction, and the 2nd plate (52c) is electrically connected with described the 2nd contact and extends to the direction away from this contact;
It is characterized in that:
Described yoke (52) is electrically connected with described the 2nd contact (32) with the lateral plate (52a) near the circuit breaker contact;
The intermediate (52c) of described yoke (52) disposes with extension (71c) subtend of a described run-on tab, self determines described the 2nd run-on tab with this intermediate (52c).
2. tie breaker as claimed in claim 1 is characterized in that,
Described coil (51) is wrapped in the periphery of the coil tube (53) of electrical insulating material, the flange (53a) that is located at the electric insulating quality on the axial end of described coil tube (53) be configured in two lateral plates of yoke (52) between circuit breaker contact a lateral plate (52b) and coil (51) far away.
3. tie breaker as claimed in claim 1 or 2 is characterized in that,
Described coil (51) is surrounded the periphery of the iron core part that comprises described plunger, be formed with maintenance groove (52d), (52e) at the both ends that embed iron core part on each lateral plate (52a) of described yoke (52), (52b), described maintenance groove (52d), (52e) are opened on the periphery of each lateral plate (52a), (52b).
The maintenance lug (17a), (17b) that stretch out in the medial surface of circuit breaker case 10 are embedded in above-mentioned maintenance groove (52d), (52e), and each end of keeping clamping iron core part between the inner rim of groove.
4. as the tie breaker of claim 1 record, it is characterized in that,
Described coil (51) be located at coil tube (53) around,
Be formed with the internal diameter thin head (53b) littler than pars intermedia in an axial end of coil tube (53),
The diameter of described plunger (54) has the big and part littler than the internal diameter of pars intermedia of internal diameter than above-mentioned thin head (53b), and plunger is being contained in the coil tube with axially can move freely,
Be fixed with fixed iron core (55) in axial the other end of coil tube (53), between fixed iron core (55) and plunger (54), establish back-moving spring (56), the part of fixed iron core (55) is stretched out from coil tube (53), in an end of a lateral plate (52a) the upper fixed line circle tube (53) of yoke (52), fixed iron core (55) is with another lateral plate (52b) magnetic coupling of its ledge and yoke (52).
5. as the electric current breaker of claim 1 record, it is characterized in that,
Described two run-on tabs are contained in the space between the two side of circuit breaker case, and the width between the two side in the above-mentioned space enlarges along the electric arc direction of advance.
6. tie breaker comprises as the lower part:
Circuit breaker contact (31), (32) between a pair of load side terminal (20b) that is connected power supply side terminal (20a), this circuit breaker contact is made up of the 1st contact (31) and the 2nd contact (32);
One detects to have in the above-mentioned main circuit and forcibly the 2nd contact (32) is pulled away from the 1st after the super-high-current circulation and touches the electromagnetic release device of (31);
A pair of when above-mentioned contact (31), (32) separate because run-on tab (71), (52c) that the electric arc of following the electromagnetic force in the magnetic field that arc current produces to make to take place between the 1st and the 2nd contact (31), (32) moves towards the direction away from contact, two run-on tabs are housed in the space between the two side of circuit breaker case
It is characterized in that,
Width between the two side in described space enlarges along the electric arc direction of advance.
7. as the tie breaker of claim 6 record, it is characterized in that,
On the two side of described circuit breaker case, be formed with concavo-convex (19a) that be step-like.
8. as the tie breaker of claim 6 or 7 records, it is characterized in that,
At least one run-on tab (71) has along with the distance from the circuit breaker contact enlarges and run-off the straight, makes the rake (71) of the distance of its expansion and another run-on tab (52c).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01678394A JP3619259B2 (en) | 1994-02-10 | 1994-02-10 | Circuit breaker |
| JP1678294A JP2972075B2 (en) | 1994-02-10 | 1994-02-10 | Circuit breaker |
| JPP.16782/94 | 1994-02-10 | ||
| JPP.16783/94 | 1994-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108000A CN1108000A (en) | 1995-09-06 |
| CN1037794C true CN1037794C (en) | 1998-03-18 |
Family
ID=26353179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94117833A Expired - Lifetime CN1037794C (en) | 1994-02-10 | 1994-11-29 | A circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1037794C (en) |
| GB (1) | GB2286486B (en) |
| HK (1) | HK1012775A1 (en) |
| MY (1) | MY116226A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10126851C1 (en) * | 2001-06-01 | 2002-12-19 | Siemens Ag | Switching device with electromagnetic release having components supported by bearings provided by parts of housing of switching device |
| DE102006011982B4 (en) * | 2005-10-26 | 2009-04-02 | Abb Ag | Electrical switching device |
| EP1876617A1 (en) * | 2006-07-06 | 2008-01-09 | ABB PATENT GmbH | Electrical installation switch with pre-arcing chamber, arcing horns and current limiting arc chute |
| US8592709B2 (en) | 2008-04-15 | 2013-11-26 | General Electric Company | Current path arrangement for a circuit breaker |
| CN101582354B (en) * | 2009-06-08 | 2011-05-04 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnetic short current protective device for breaker |
| DE102010032828B4 (en) * | 2010-07-30 | 2021-12-02 | Siemens Aktiengesellschaft | Switching device, in particular circuit breaker with toggle lever |
| EP2750157B1 (en) * | 2012-12-27 | 2015-06-24 | Hager Electro Sas | Selective circuit-breaker arranged in a modular case |
| CN103681146B (en) * | 2013-12-10 | 2016-08-17 | 德力西电气有限公司 | A kind of miniature circuit breaker |
| KR102542379B1 (en) * | 2020-03-03 | 2023-06-12 | 엘에스일렉트릭(주) | Arc extinguishing assembly |
| IT202100023873A1 (en) | 2021-09-16 | 2023-03-16 | Gewiss Spa | AUTOMATIC SWITCH |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604507A (en) * | 1983-12-26 | 1986-08-05 | Merlin Gerin | Miniature circuit breaker with improved insulation level |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0050719B1 (en) * | 1980-08-21 | 1985-11-13 | Heinrich Kopp GmbH & Co. KG | Contact and extinguishing means for electrical automatic miniature switches |
| DE9002197U1 (en) * | 1990-02-24 | 1991-06-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Circuit breaker with an electromagnetic release device |
-
1994
- 1994-11-29 CN CN94117833A patent/CN1037794C/en not_active Expired - Lifetime
- 1994-12-30 GB GB9426393A patent/GB2286486B/en not_active Expired - Fee Related
- 1994-12-30 MY MYPI94003572A patent/MY116226A/en unknown
-
1998
- 1998-12-17 HK HK98113823A patent/HK1012775A1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604507A (en) * | 1983-12-26 | 1986-08-05 | Merlin Gerin | Miniature circuit breaker with improved insulation level |
Also Published As
| Publication number | Publication date |
|---|---|
| HK1012775A1 (en) | 1999-08-06 |
| GB9426393D0 (en) | 1995-03-01 |
| GB2286486A (en) | 1995-08-16 |
| GB2286486B (en) | 1998-06-10 |
| CN1108000A (en) | 1995-09-06 |
| MY116226A (en) | 2003-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1037794C (en) | A circuit breaker | |
| US4733211A (en) | Molded case circuit breaker crossbar assembly | |
| US5585609A (en) | Circuit breaker with movable main contact multi-force-level biasing element | |
| EP0872866A2 (en) | Thermal trip unit with magnetic shield and circuit breaker incorporating same | |
| CN1480968A (en) | Switchgear | |
| US7800478B2 (en) | Electrical switching apparatus and heater assembly therefor | |
| US7358840B1 (en) | Electrical switching apparatus including a split core slot motor and method of installing a slot motor assembly in a circuit interrupter | |
| CN1159743C (en) | Coaxial relay | |
| US4782583A (en) | Method of assembling a molded case circuit breaker crossbar | |
| US7868731B2 (en) | Thermal overload relay | |
| US5566818A (en) | Movable contactor device in circuit breaker | |
| AU740135B2 (en) | Circuit breaker with an anti-lift pivot handle | |
| DE69504925T2 (en) | OPERATING HANDLE FOR CIRCUIT BREAKERS | |
| CN103165357B (en) | Circuit-breaker | |
| US20030053274A1 (en) | Trip cross bar and trip armature asembly for a circuit breaker | |
| CN1103732A (en) | Circuit breaker mechanism | |
| CN1340838A (en) | Circuit treaker for magnetic induction type automatic trip component with realized spring clip | |
| JP2003508883A (en) | Circuit breaker with rocker piece with improved pivot connection | |
| US6624731B2 (en) | System and method for auxiliary contact assembly | |
| JPH0896689A (en) | Trip device of circuit breaker | |
| TW200426874A (en) | The circuit breaker | |
| US20220406550A1 (en) | Crossbar assembly and trip assembly comprising same | |
| CN2874883Y (en) | Heat protector | |
| JP2619359B2 (en) | Circuit breaker for wiring | |
| JPH0614409Y2 (en) | Electromagnetic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141129 Granted publication date: 19980318 |