WO2006114926A1 - 回路遮断器 - Google Patents
回路遮断器 Download PDFInfo
- Publication number
- WO2006114926A1 WO2006114926A1 PCT/JP2006/302342 JP2006302342W WO2006114926A1 WO 2006114926 A1 WO2006114926 A1 WO 2006114926A1 JP 2006302342 W JP2006302342 W JP 2006302342W WO 2006114926 A1 WO2006114926 A1 WO 2006114926A1
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- WO
- WIPO (PCT)
- Prior art keywords
- movable contact
- circuit breaker
- spring
- contact
- movable
- Prior art date
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Classifications
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- 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
- H01H73/04—Contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism
Definitions
- the present invention relates to a circuit breaker such as a circuit breaker for wiring or an earth leakage breaker, and more particularly to a stability of a contact resistance value in a sliding contact method of a movable contact device.
- the circuit breaker switching life includes a mechanical switching life and an electrical switching life.
- the former is mainly determined by wear and damage to the mechanism. In addition to them, the latter is governed by contact wear and is usually shorter than the former. Damage to the mechanism is a major factor that limits the opening and closing life, especially due to fatigue breakage of parts that are electrically connected with copper flat braided wires or thin plates for flexibility (hereinafter referred to as shunts). is there.
- Patent Document 1 Japanese Patent Laid-Open No. 9 306326
- Patent Document 2 JP-A-7-6681
- the above-mentioned pressing by the compression spring means that the contact surfaces facing each other of the movable element receiver are bent and brought into contact with the movable contact element. For this reason, point contact due to stagnation may occur and an increase in contact resistance may occur immediately, and the contact surfaces facing each other must be made thin. Is not suitable, and it is possible to prevent the deformation during the parts processing 'assembly process' and the parts handling process, that is, pay special attention to maintain the proper dimensions.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a circuit breaker including a movable contact device that is small and has stable contact resistance. Means to solve
- a movable contact device in a circuit breaker includes a crossbar coupled to an opening / closing mechanism and supported to rotate in conjunction with the opening / closing mechanism, and a crossbar coupled to the crossbar.
- a movable contact that is engaged with a shaft that is fitted in the opposing recesses of the bar, and a movable contact that is fixed to a housing that houses the opening and closing mechanism and has opposing through holes that penetrate the shaft.
- the movable contact is configured such that the movable contact slides between the surfaces of the movable contact that have the opposing through holes, and the configuration of one pole of the movable contact has a movable contact at each end.
- Two movable contact bodies are arranged in parallel, and an elastic member is sandwiched between the two movable contact bodies at the shaft support portion at the other end.
- the present invention can provide a circuit breaker including a movable contact device having a high current-carrying capability while being a shuntless current-carrying mechanism having an excellent mechanical switching life.
- FIG. 1 is a front view showing a closed state of a circuit breaker according to Embodiment 1 of the present invention.
- FIG. 2 is a partial sectional view taken along line AA in FIG.
- FIG. 3 is a cross-sectional view taken along line BB in FIG.
- FIG. 4 is a view corresponding to FIG. 3 in Embodiment 2 of the present invention.
- FIG. 5 is a view corresponding to FIG. 2 in Embodiment 3 of the present invention.
- FIG. 6 is a view corresponding to FIG. 3 in Embodiment 3 of the present invention.
- FIG. 7 is an external perspective view of a coil spring according to Embodiment 3 of the present invention.
- FIG. 8 is a view corresponding to FIG. 3 in Embodiment 4 of the present invention.
- FIG. 9 is an external view of a corrugated spring according to Embodiment 5 of the present invention.
- FIG. 10 is a side sectional view of a circuit breaker according to Embodiment 7 of the present invention.
- FIG. 11 is a partial sectional view taken along line AA in FIG.
- FIG. 12 is a partial cross-sectional view corresponding to FIG. 11 in Embodiment 8 of the present invention.
- FIG. 13 is a partial cross-sectional view corresponding to FIG. 11 in Embodiment 9 of the present invention.
- FIG. 14 is a partial sectional view taken along line BB in FIG.
- FIG. 15 is a cross-sectional view corresponding to FIG. 10 in Embodiment 10 of the present invention.
- FIG. 16 is a partial view corresponding to FIG. 14 in Embodiment 10 of the present invention.
- FIG. 18 A perspective view of one movable contact body according to the eleventh embodiment of the present invention.
- FIG. 19 A perspective view of one movable contact body according to the twelfth embodiment of the present invention.
- FIG. 20 is a perspective view of one movable contact body according to the thirteenth embodiment of the present invention.
- FIG. 21 is a perspective view of one movable contact body according to the fourteenth embodiment of the present invention.
- FIG. 22 is a front view showing a movable contact structure for one pole of a circuit breaker according to Embodiment 15 of the present invention.
- FIG. 23 is a bottom view of the force in the direction of arrow A in FIG.
- FIG. 24 is a component diagram of the spring hook member in FIG.
- FIG. 1 is a front view showing a closed state of a circuit breaker according to Embodiment 1 of the present invention
- FIG. 2 is a partial cross-sectional view taken along line AA in FIG. 1, and is a plan view of a movable contact device for one pole.
- Doubles as 3 is a cross-sectional view taken along line BB in FIG.
- a cover 1 and a base 2 constitute a casing of the circuit breaker 101 and are each formed of a synthetic resin.
- the opening / closing mechanism 102 is housed in the base 2, and the handle 3 linked to the opening / closing mechanism 102 protrudes from the handle window hole la of the cover 1 to the surface of the cover 1 and can be operated by hand from the outside.
- the right side is not shown on the page!
- the left side is not shown! ⁇
- a stationary contact 4 constituting a connection portion with the power supply side electric wire is fixed to the base 2 by a mounting screw 5, and a stationary contact 6 fixed to one end of the stationary contact 4 is one end of the movable contact 8.
- the circuit breaker 101 is opened and closed, that is, the electric circuit is turned on and off by making contact with and separating from the fixed movable contact 7.
- This opening / closing is performed by connecting the movable contact 8 with a crossbar 10 that engages the shaft 9 (see FIG. 2) 10 with the force opening / closing mechanism 102, so that a force is generated according to the operation of the opening / closing mechanism 102.
- the detailed explanation is omitted here.
- the movable contact 8 is clamped by a movable receiver 11, which is fixed to the base 2 by a mounting screw 12 and connected to the relay conductor 14 by a mounting screw 13.
- This relay conductor 14 is connected to a load conductor 15 constituting a connection portion with a load side electric wire via a heater constituting an overcurrent tripping device (not shown). Therefore, the current path in this closed state is fixed contact 4 ⁇ fixed contact 6 ⁇ movable contact 7 ⁇ movable contact 8 ⁇ movable contact 11 ⁇ relay conductor 14 ⁇ heater 1 ”load conductor 15 and use the shunt.
- the shuntless energization mechanism is a very powerful element, and the movable contactor sandwiched between the above-described mover receiver 11 is the core of the shuntless energization mechanism, that is, the main part of the present invention. 8.
- the electrical contact between the movable contact 8 and the movable receiver 11 will be described in detail below.
- the mover receiver 11 includes a base portion 11a including a screw hole (not shown) to which the mounting screw 12 is screwed, and a first through hole 11c through which the mounting screw 13 passes, and the base portion 1 la. Is formed integrally with a pair of connection conductor portions l ib that have second through-holes id that are opposed to each other and that have shafts 9 passing through.
- the movable contact 8 has the movable contact 7 fixed to one end and a through hole 8a at the other end, and the shaft 9 passes through the through hole 8a. 8 is rotatably engaged with the cross bar 10.
- a groove 8b is provided on the opposite side of the opposing surfaces of the movable contactors 81 and 82, which are arranged in parallel, constituting the movable contact 8, that is, the surface in contact with the mover receiver 11, and this groove 8b A spring as an elastic member 16 loosely fitted on the shaft 9 is inserted into the shaft 9.
- the force having two movable contact bodies 81 and 82 is not limited to these two.
- the spring 16 is a so-called push spring, and is sandwiched between the movable contact members 81 and 82 arranged side by side, and has a dimension C between at least a pair of connecting conductor portions l ib.
- the movable contact bodies 81 and 82 are pressed in the direction in which the opposing surfaces of the movable contact bodies 81 and 82 are in contact with each other and inserted between the pair of connection conductor portions l ib until the following is obtained.
- a shuntless energizing mechanism is configured by attaching a contact pressure spring (not shown) that applies a rotational moment to the movable contact 8 and thereby generates a contact pressure between the fixed contact 6 (see Fig. 1) and the movable contact 7. Is done. Therefore, the contact portion 8c of the movable contact 8 can be kept in surface contact with the connection conductor portion l ib by the spring 16, so that the contact resistance is stabilized.
- Embodiment 1 it is assumed that the rated current is upgraded based on the increase in current carrying capacity, and multiple (2) movable contact bodies 81 and 82 are used. However, the rated current is not upgraded or assumed. A case where one thick movable contact 8 is used will be described as a second embodiment.
- FIG. 4 is a diagram corresponding to FIG. 3 in the second embodiment.
- a groove 8b is provided on the side of the movable contact 8 opposite to the contact portion 8c, and a spring 16 loosely fitted on the shaft 9 is inserted into the groove 8b.
- the spring 16 is a push spring
- the movable contact 8 is interposed between the pair of connecting conductor parts l ib so as to be sandwiched between the movable contact 8 and the movable receiver 11. insert.
- the mounting of the shaft 9 and the contact pressure spring (not shown) is the same as in the first embodiment. Therefore, also in the second embodiment, the contact 16 can be kept in surface contact with the connecting conductor portion ib by the spring 16, so that the contact resistance is stabilized.
- Embodiment 3 Even in the first embodiment, since the spring 16 is not arranged outside, it contributes sufficiently to the miniaturization of the shuntless energization mechanism, but a certain contact pressure between the movable contact 8 and the movable receiver 11 is applied. In order to produce it, the wire diameter of the spring 16 must be taken into account, and the dimension between the movable contacts 8 (D dimension on the paper in Fig. 2) cannot be ignored. A case where the dimension D is minimized is described as a third embodiment. 5 and 6 are diagrams corresponding to FIGS. 2 and 3, respectively, in the third embodiment. FIG. 7 is an external perspective view of the coil spring used in the third embodiment.
- a groove 8b is provided on the opposite side of the opposing surfaces of the movable contact bodies 81, 82 arranged side by side, that is, the surface in contact with the movable element receiver 11.
- a coil spring 17 is sandwiched between 8b.
- the coil spring 17 is formed in a ring shape by joining both ends of a normal push spring, and the contact portion 8c is brought into contact with the connection conductor portion l ib side in FIG. 5 (a). A load can be applied in the direction.
- the total dimensions of the movable contact 8 with the coil spring 17 sandwiched between them (corresponding to E + D + E on the paper surface) is only slightly larger than the dimension C. It can be pressed in the direction of close contact, and insertion between the pair of connecting conductor portions l ib is easy.
- dimension D is a force that slightly shrinks compared to before insertion into the mover receiver 11. This reduced amount is converted into a pressing force to the connecting conductor portion l ib of the contact portion 8c. Will be.
- the second through hole l id and the through hole 8a are aligned, and the shaft 9 is passed through these through holes l id and 8a.
- FIG. Engage with the groove (not shown).
- mounting a contact pressure spring (not shown) is the same as in the first embodiment.
- the contact portion 8c of the movable contact 8 can be kept in surface contact with the connecting conductor portion l ib by the coil spring 17, so that the contact resistance is stabilized and shunted as in the first embodiment. It is possible to reduce the size of the power supply mechanism itself.
- the coil spring 17 is a force formed so as to be substantially parallel to the shaft 9. As shown in FIG.
- the coil spring 17 may be formed so as to have an angle 0 with respect to the left-right direction of 9. In this case, the pressing force to the connection conductor portion l ib of the contact portion 8c is further stabilized. [0025] Embodiment 4.
- FIG. 8 is a diagram corresponding to FIG. 3 in the fourth embodiment.
- a groove 8b is provided on the side opposite to the contact portion 8c of the movable contact 8, and a coil spring 17 is sandwiched in the groove 8b. Similar to the third embodiment, a slight load is applied to the coil spring 17 by being sandwiched, and the contact portion 8c is pressed against the connection conductor portion ib. For this reason, as shown in the figure, the dimension C between the connecting conductor parts l ib only needs to be slightly larger than the plate thickness dimension E of the movable contact 8, so that the contact resistance is stable. In addition, the current carrying capacity can be expected to increase due to further miniaturization or thickening of the movable contact 8.
- FIG. 9 is an external view of a corrugated member used in the fifth embodiment, where (a) is a perspective view and (b) is a side view.
- the force that was a coil panel formed in a ring shape is inserted into the groove 8c of the mover 8 shown in FIG. 6 or FIG. This will be described as a fifth embodiment.
- each vertex 18a of the member (here, referred to as corrugated leaf spring 18) is movable contactor 8, or movable contactor 8 and movable member.
- the load D in the direction of arrow G is applied to the corrugated spring 18 because the dimension D (see Fig. 6) due to contact with the receiver 11 and the movable contact 8 being inserted into the movable element receiver 11 is shorter than the dimension F.
- the contact portion 8c is pressed by the connecting conductor portion l ib. Accordingly, not only can the contact resistance be stabilized, but also a smaller size of the chantressless energizing mechanism can be achieved.
- the left movable contact body 81 ⁇ the right movable contact body 82 ⁇ the right connection conductor part 1 lb can be secured, preventing a significant increase in resistance. it can.
- FIG. 10 is a cross-sectional view showing a closed state of the circuit breaker according to Embodiment 7 of the present invention
- FIG. 11 is a partial cross-sectional view taken along line AA in FIG.
- a cover 1 and a base 2 constitute the casing of the circuit breaker 101, and are each formed of a synthetic resin material.
- An opening / closing mechanism 102 is housed in the base 2, and a handle 3 interlocking with the opening / closing mechanism 102 projects from the handle window hole la of the cover 1 to the surface of the cover 1.
- the handle 3 can be manually operated from the outside.
- the right side is for example a connection terminal part (not numbered) for connecting a power supply side electric wire
- the left side is for example a connection terminal for connecting a load side electric wire. It is well known that it is a part (not numbered).
- the fixed contact 4 constituting the connection terminal portion with the power supply side electric wire is fixed to the base 2 by the mounting screw 5, and the fixed contact 6 fixed to one end of the fixed contact 4 is
- the circuit breaker 101 is opened and closed, that is, the electric circuit is turned on and off, by moving to and away from the movable contact 7 fixed to one end of the movable contact 8.
- the movable contact 8 is supported by the shaft 9 (see FIG. 11) via the mover receiver 11, and the crossbar 10 that holds the movable contact 8 is connected to the opening and closing mechanism 102. Therefore, opening and closing is performed according to the operation of the opening and closing mechanism 102. Since this opening / closing operation does not form a main part of the present invention, the details are omitted!
- the movable contact 8 is clamped by the movable receiver 11, and this movable receiver 11 is fixed to the base 2 by the mounting screw 12 and is connected to the relay conductor 14 by the mounting screw 13. ing.
- the relay conductor 14 is connected to a load conductor 15 constituting a connection terminal portion with a load side electric wire via a heater constituting an overcurrent tripping device (not shown). Therefore, the current path in this closed state is fixed contact 4 ⁇ fixed contact 6 ⁇ movable contact 7 ⁇ movable contact 8 ⁇ movable contact 11 ⁇ relay conductor 14 ⁇ heater 1 ”load conductor 1
- a shuntless energization mechanism that does not use a shunt is configured.
- the movable contact 8 and the movable receiver 11 will be mainly described.
- the mover receiver 11 includes a base portion 11a including a screw hole (not shown) into which the mounting screw 12 is screwed, and a first through hole 11c through which the mounting screw 13 passes. It is formed integrally with a pair of connecting conductor portions l ib that are raised at a right angle from the base portion 1 la, have opposite ends, and have a second through hole l id for the shaft 9 to pass through.
- the material for forming the mover receiver 11 has good conductivity, uses a copper plate, and takes into consideration the plate thickness and shape that do not easily deform.
- the movable contact 8 has the movable contact 7 fixed to one end and a through hole 8a at the other end.
- the shaft 9 is passed through the through hole 8a to receive the movable contact. It is rotatably supported by 11 second through holes l id.
- the cross bar 10 holds both ends of the shaft 10 and holds the movable contact 8 so that the movable contact 8 responds to the operation of the opening / closing mechanism 102.
- the movable contact 8 is intended to be applied to a medium or large circuit breaker by arranging two movable contact bodies 81 and 82 in parallel.
- Counterbore 8b is provided in the portion of the through hole 8a on the inner surface opposite to the opposing surfaces of the movable contact bodies 81, 82 arranged side by side, that is, the surface in contact with the mover receiver 11. ing. Both ends of the elastic member 16 loosely fitted to the shaft 9 are fitted to the counterbore 8b.
- various elastic springs can be used as the elastic member 16, and the elastic member 16 shown in the drawing is an embodiment using a helical spring.
- the contact portion 8c of the movable contact 8 is pressed against the connection conductor portion l ib to maintain surface contact. Can do.
- This surface contact stabilizes the electrical contact state between the movable contact 8 and the movable receiver 11. Further, since it is not necessary to envelop the connecting conductor part l ib, the connecting conductor part l ib can be made thicker, and the current carrying capacity corresponding to the medium-large circuit breaker can be accommodated.
- the elastic member 16 is the force shown in the embodiment of the helical spring. When the parallel arrangement of the pair of movable contacts 8 is made narrow, both ends of the leaf spring or the thin helical spring are connected. A spring formed in a ring shape is suitable.
- the movable contact 8 is configured by arranging two movable contact bodies 81 and 82 in parallel, a large current flows as shown in Patent Document 1.
- An attractive force is generated between 1 and 82 by electromagnetic force.
- the suction suppression member 19 is fixed to either one of the movable contact members 81 and 82 by means of rivets or adhesion.
- the suction suppression member 19 is suitably a synthetic resin material such as nylon, but may be formed of a metal material.
- the suction suppression member 19 can stably maintain the contact state between the movable contact 8 and the mover receiver 11 when a large current is passed. It is possible to prevent welding due to arcing between both parts.
- the elastic member 16 is sandwiched between the movable contact bodies 81 and 82 arranged side by side, and the movable contact and the pivot support portion Since the suction restraining member is sandwiched between the intermediate portions, it is possible to provide a shuntless energization mechanism that does not cause welding due to arcing and has a small force. Further, according to this configuration, the open / close life of the medium or large circuit breaker can be improved.
- FIG. 12 is a view corresponding to FIG. 11 in Embodiment 8 of the present invention.
- the suction restraining member 19 is sandwiched and fixed on the shaft 9 side with respect to the intermediate position between the movable contact 7 and the shaft 9. That is, the dimension “a” from the contact 7 to the position of the suction suppression member 19 is made larger than the dimension “b” of the suction suppression member 19 to the position force shaft 9.
- the attractive force when passing a large current works more strongly on the contact side than on the shaft 9 side. Therefore, the suction force acts so as to open the space between the movable contact bodies 81 and 82 on the shaft 9 side with the suction suppression member 19 as a fulcrum. Since this action works so that the movable contact 8 is pressed against the movable receiver 11, the contact state between the movable contact 8 and the movable receiver 11 is further stabilized.
- FIG. 13 is a view corresponding to FIG. 11 in Embodiment 9 of the present invention
- FIG. 14 is a sectional view taken along line BB in FIG.
- the vibration suppression portion 20a when the vibration suppression portion 20a is brought into contact with both outer side surfaces of the movable contact 8, that is, the outer side surfaces where the suction suppression member 19 is sandwiched among the outer contact surfaces of the connection conductor portion ib.
- the vibration suppressing portions 20a on both outer surfaces are connected to the connecting portion.
- a vibration suppressing member 20 is formed by connecting by 20b.
- the vibration suppression member 20 and the suction suppression member 19 are integrally coupled as illustrated.
- the vibration suppression member 20 and the suction suppression member 19 may be separate parts, but if formed of a synthetic resin material, the vibration suppression member 20 and the suction suppression member 19 can be integrally molded. It is.
- the movable contact 8 When the circuit breaker is subjected to vibration and impact, the movable contact 8 may move outward, but by providing the vibration suppression member 20 together with the suction suppression member 19 as described above, Vibration 'Can prevent movement caused by impact. Therefore, the contact state between the movable contact 8 and the movable receiver 11 is further stabilized.
- FIG. 15 and FIG. 16 are diagrams corresponding to FIG. 10 and FIG. 14 in Embodiment 10 of the present invention.
- the arc that discharges gas that prevents arc jumping to the crossbar 10 side and induces the arc to the power source side when overcurrent is interrupted, near the movable contact 7 on both sides of the movable contact 8 10 is the same as FIG. 10 except that an insulating member (vibration suppressing member 20 described later) is fixed.
- the arc insulating member is fixed to the movable contact 8 so as to hold both side surfaces of the movable contact 8. That is, the feature of the tenth embodiment is that the vibration suppressing member 20 described in the ninth embodiment (FIG. 14) has an arc insulation function.
- the material of the vibration suppression member 20 is, for example, as shown in Patent No. 3359422 as an arc extinguishing insulating material composition / an arc extinguishing insulating material molded body material. Polyethylene terephthalate, nylon 66, nylon 46, etc. are suitable.
- the vibration suppression member 20 and the suction suppression member 19 are integrated, the suppression member 20 and the suction arch I suppression member 19 may be integrally formed using these materials.
- the contact state between the movable contact 8 and the movable receiver 11 is stabilized, and the interruption performance is improved by the arc extinguishing gas generated when the arc touches the arc insulating member 18. To do.
- FIG. 17 is a circuit breaker related to the present invention, and the movable contactor which is the main part of the invention It is explanatory drawing which showed 1 pole part.
- reference numeral 8 denotes a movable contact, which is constructed by arranging two movable contact bodies 81 and 82 in parallel, and can be pivotally supported at the other end.
- 7 is a known movable contact provided at one end of the movable contact members 81 and 82, and opens and closes an electric circuit with a fixed contact (not shown) provided at the bottom of the casing.
- Reference numeral 19 denotes a suction deterrent member for maintaining the movable contact bodies 81 and 82 at a predetermined interval, and inhibits the action of the movable contact bodies 81 and 82 being attracted by electromagnetic force when a large current flows.
- Reference numeral 11 denotes a current-carrying mover receiver formed of a copper plate, which rotatably supports the other end of the movable contact 8 by a shaft 9 and sandwiches the outer surface of the movable contact 8. The mover receiver 11 is screwed to the bottom of a housing (not shown) through a through hole 11a.
- Reference numeral 16 denotes an elastic member, which is sandwiched so as to abut against the inner surface of the shaft support portion of the movable contact 8 and is attached so as to press the two movable contact bodies 81, 82 against the energizing mover receiver 11. It is energized. By this energization, the outer surface of the movable contact 8 and the energizing mover receiver 11 are in electrical contact. In addition, 81g and 82g are spot facings for sandwiching the elastic member. 10 is a cross-sectional view of a known cross bar, which is connected to an opening / closing mechanism (not shown) and opens / closes the movable contact 8 by the operation of the opening / closing mechanism, which forms the main part of the present invention. Because it is not a thing V, detailed explanation is omitted.
- FIG. 18 shows an eleventh embodiment relating to the main part of the present invention, and is a perspective view of one of the movable contact members 81, 82.
- the movable contact body 81 is shown.
- the movable contact body 81 is formed by laminating a plurality of segments 81a to 81e of thin copper plates formed in the same shape, and rivets 83 at a plurality of places (three places in this embodiment). By fixing with, for example, it has a plate thickness equivalent to that of the contact body (reference numeral 6) shown in FIG.
- the stacking of segments 81a to 81e differs depending on the rated current of the circuit breaker, but usually lmn! It is formed by laminating several thin copper plates with a thickness of ⁇ 2mm.
- the thin copper plate may be a copper alloy thin plate material having good conductivity depending on the rated current.
- the movable contact body 82 is formed in the same manner.
- a hole 8a for passing through the shaft for rotating the movable contact 8 and a mounting hole for means for driving an arc generated when an overcurrent is interrupted for example, Japanese Patent No. 335942
- Hole 8b for mounting insulating grease as shown in No. 2 publication can be obtained at the same time when segments 81a to 81e are manufactured, thus reducing the manufacturing cost of movable contact 8 itself. can do.
- the bonding surface 8c was fixed after it was uniformly sewn. Is preferred.
- the elastic member 16 has been shown as an example of a helical spring, in the case where the interval between the movable contact members 81 and 82 is narrowed for miniaturization, the elastic member 16 is wound by a leaf spring or thinly. A spring formed into a ring shape by connecting both ends of a helical spring is suitable.
- the counterbore 81g, 82g can be easily formed if the hole 8a for passing the shaft through one of the inner segments 81a has a large hole.
- FIG. 19 is a perspective view of the movable contact body according to the twelfth embodiment of the present invention and corresponds to FIG. 18 according to the eleventh embodiment.
- the movable contact 8 constituted by the two movable contact bodies 81 and 82 is rotatably supported by the movable receiver 11 and the outer surface is sandwiched. Yes.
- the elastic member 16 is sandwiched between the movable contact bodies 81 and 82 so that the movable contact 8 and the movable receiver 11 are in electrical contact.
- FIG. 20 is a drawing corresponding to FIG. 18 in the eleventh embodiment showing the thirteenth embodiment of the present invention.
- the circuit breaker may include an auxiliary device for notifying the outside of the open / close state of the circuit breaker, that is, the open / close position of the movable contact 8.
- a micro switch is generally used for this accessory device, and the movement of the movable contact 8 is transmitted to the micro switch actuator. (For example, see FIG. 1 of the circuit breaker disclosed in Japanese Patent Laid-Open No. 9306328).
- the force that requires an engaging portion with the actuator on the movable contact 8 is not affected by the magnitude of the rated current.
- the attachment device itself is a micro switch, so that the engaging portion itself provided on the movable contact 8 can be relatively small.
- the attachment device can be handled. . Therefore, it is easier to manufacture and a reduction in manufacturing cost can be expected as compared with the case where one conventional movable contact having a thickness equivalent to that of the movable contact 8 is subjected to protrusion processing in a separate process.
- the engagement protrusion 8 t is provided on the segments 81 a to 81 e of the movable contact body 81 has been described.
- the engagement protrusion 8 t may be provided on the segment of the movable contact body 82.
- FIG. 21 is a drawing corresponding to FIG. 18 in the eleventh embodiment showing the fourteenth embodiment of the present invention.
- the segments 81a to 81e forming the movable contact body 81 have heat radiation irregularities 8f, 8g, and 8h at different positions on the outer peripheral edges of the adjacent segments 81a to 81e.
- the unevenness for heat dissipation is formed into an unevenness having a small size in a portion where the influence on the density of the current flowing through the movable contact body 81 is small.
- the heat radiation irregularities 8f, 8g, and 8h can be provided on a part of the segments 81a to 81e, and can be provided on all of the force segments 81a to 81e.
- the force circuit breaker that increases the types of segments is a mass-produced product, and usually has one movable contact for three poles. The impact of costs due to the increase in segment types is small.
- the configuration of the movable contact 8 according to the application can be obtained at a low processing cost. Can be expected.
- FIG. 22 is a front view for explaining the structure of the movable contact for one pole
- FIG. 23 is an arrow in FIG. It is the bottom view seen from the T direction.
- FIG. 24 is a component diagram of the spring hook member in FIGS. 22 and 23.
- a movable contact 7 that repeats contact and separation with the fixed contact 6 fixed to one end of the fixed contact 4 is fixed to one end of the movable contact 8.
- the movable contact 8 is rotatably supported by a shaft 9 at the other end via a movable receiver 11 (indicated by a one-dot chain line) fixed to a base (not shown).
- the movable contact 8 is configured by arranging two (one pair) plate-like movable contact bodies 81 and 82 in parallel and fixing the movable contact 7 to each. ing.
- Reference numeral 10 is a well-known cross bar which integrally connects the multi-pole movable contact 8 in order to open and close the multi-pole movable contact 8 by a single opening / closing mechanism 102.
- Reference numeral 30 is a flexible electric wire that is held in response to the rotation of the movable contactor 8.
- Reference numeral 31 is a force that is a relay conductor connecting the flexible electric wire 30 and the heater 32.
- Flexible electric wire 30, the relay conductor 31, and the heater 32 Is well known and does not form a main part of the present invention.
- a mechanism using the flexible wire 30, that is, a force described as a shunt mechanism may be a so-called shuntless mechanism that does not use the flexible wire 30.
- the movable contact bodies 81 and 82 of the pair of movable contacts 8 are provided with elongated holes 8s facing each other in the middle between the movable contact 7 and the shaft 9, respectively.
- a spring hook member 21 is stretched over the long hole 8s.
- a slit-shaped first spring hook portion 21a is provided on the spring hook member 21 at a position where the center point of the spring hook member 21, that is, the center point of the distance between the two contact pieces 81 and 82 substantially coincides. It has been.
- crossbar In 10 the second position is at a position opposite to the first spring hook portion 21 a provided on the spring hook member 21, that is, at a position corresponding to the center point of the movable contact bodies 81 and 82, similar to the spring hook portion 21 a.
- a spring hook 10a is provided.
- One contact pressure tension spring 22 is stretched between the second spring hook portion 10a and the first spring hook portion 21a.
- the first of the spring hook member 21 is used. It is preferable that the spring hooking portion 21a is disposed substantially at the center of the movable contact bodies 81 and 82. With the above arrangement, the tension spring 22 is stretched along the center point of the pair of movable contact bodies 81 and 82. By configuring in this way, the acting force F (see FIG. 22) of the working point force located on the tangent line of the circle having a radius between the shaft 9 and the spring hooking member 21 acts as the contact pressure.
- the force of the tension spring 22 located approximately at the center of the two action points S is applied to the action point S of the pair of movable contact bodies 81 and 82 via the spring hooking member 21. It is transmitted and acts in the direction of pressing the movable contact 7 against the fixed contact 6.
- the cross bar 10 can be rotated integrally with the movable contact 8 about the shaft 9. At this time, since the contact pressure pulling spring 22 is stretched around the movable contact 8, the movable contact 8 is always urged in the direction of arrow A. Therefore, when the movable contact 7 of the movable contact 8 is separated from the fixed contact 6 of the fixed contact 4, the movable contact 8 is always in contact with and locked to the locking portion 10b of the cross bar 10. .
- the cross bar 10 is further rotated in the direction of arrow A. Let By the rotation, the movable contact 8 is separated from the locking portion 10b of the cross bar 10 as shown by the dimension C. When a gap of size C is created, the acting force of the contact pressure tension spring 22 acts as the contact pressure between the movable contact 7 and the fixed contact 6.
- the structure of the crossbar 10 described above is that when an electromagnetic repulsive force due to a large current is applied between the movable contact 8 and the fixed contact 4, the movable contact 8 is shown by an arrow B regardless of the opening / closing mechanism 102. It can be freely rotated in any direction, these are known as crossbar 10 It is.
- the crossbar 10 is generally a multi-pole movable contact 8 that is integrally formed of a synthetic resin material, but the portion that engages the movable contact 8 is made of a synthetic resin material or metal. It is possible to implement the configuration of the present invention even with a crossbar that is formed for each movable contact 8 using a material and is connected by a connecting shaft formed of an insulating material.
- the force exerted by the contact pressure pulling spring 22 has a long hole 8s extending in the direction opposite to the acting force F, as is apparent from FIG. This is because even if the movable contact 7 or the fixed contact 6 is consumed due to overcurrent interruption or the like, and the balance between the pair of movable contact members 81 and 82 is lost, the spring-loaded member 21 is tilted and the acting force F is applied. Can be transmitted to the movable contact bodies 81 and 82. Therefore, even if only one tension spring 22 is used for the two movable contact members 81 and 82, the current-carrying capacity is not halved. It can be obtained in a small size.
- a slit is provided as a first spring hook portion 21a in the center of the spring hook member 21, and a contact pressure tension spring 22 is provided in the slit-like first spring hook portion 21a.
- the present invention can be used in circuit breakers such as a circuit breaker for wiring and a circuit breaker.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/658,169 US7777601B2 (en) | 2005-04-20 | 2006-02-10 | Circuit breaker |
EP06713485.8A EP1873806B1 (en) | 2005-04-20 | 2006-02-10 | Circuit breaker |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005122059A JP4457952B2 (ja) | 2005-04-20 | 2005-04-20 | 回路遮断器の可動接触装置 |
JP2005-122059 | 2005-04-20 | ||
JP2005337118A JP4440872B2 (ja) | 2005-11-22 | 2005-11-22 | 回路遮断器の可動接触装置 |
JP2005-337118 | 2005-11-22 | ||
JP2005348018A JP2008041251A (ja) | 2005-12-01 | 2005-12-01 | 回路遮断器 |
JP2005-348018 | 2005-12-01 | ||
JP2005359356A JP2008041252A (ja) | 2005-12-13 | 2005-12-13 | 回路遮断器 |
JP2005-359356 | 2005-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006114926A1 true WO2006114926A1 (ja) | 2006-11-02 |
Family
ID=37214557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/302342 WO2006114926A1 (ja) | 2005-04-20 | 2006-02-10 | 回路遮断器 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7777601B2 (ja) |
EP (1) | EP1873806B1 (ja) |
KR (1) | KR100846277B1 (ja) |
WO (1) | WO2006114926A1 (ja) |
Cited By (1)
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---|---|---|---|---|
CN108807092A (zh) * | 2017-05-04 | 2018-11-13 | 周思雨 | 一种微型断路器及其突合动触头组件 |
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DE102008050755A1 (de) * | 2008-10-07 | 2010-04-08 | Siemens Aktiengesellschaft | Elektrisches Gerät mit einem elektrischen Anschluss |
DE102009052965B3 (de) * | 2009-11-12 | 2011-07-21 | Eaton Industries GmbH, 53115 | Rotativer Doppelkontakt |
KR101079012B1 (ko) * | 2010-01-20 | 2011-11-01 | 엘에스산전 주식회사 | 한류형 배선용 차단기 |
EP2543057B1 (en) * | 2010-03-04 | 2015-09-09 | Labinal, LLC | Thermally managed electromagnetic switching device |
JP5655452B2 (ja) * | 2010-09-15 | 2015-01-21 | 富士電機機器制御株式会社 | 回路遮断器 |
US8476992B2 (en) * | 2011-10-07 | 2013-07-02 | Siemens Industry, Inc. | Circuit breaker having an unlocking mechanism and methods of operating same |
CN103456523B (zh) * | 2012-05-28 | 2016-05-25 | 上海拜骋电器有限公司 | 换向开关 |
KR101343185B1 (ko) | 2012-07-09 | 2013-12-19 | 엘에스산전 주식회사 | 차단기의 가동자 어셈블리 |
US9805895B2 (en) * | 2015-11-17 | 2017-10-31 | Eaton Corporation | Electrical switching apparatus and clinch joint assembly therefor |
CN112136198B (zh) * | 2018-05-10 | 2023-04-28 | 三菱电机株式会社 | 开关 |
KR20220061718A (ko) | 2020-11-06 | 2022-05-13 | 엘에스일렉트릭(주) | 아크 소호부 및 이를 포함하는 기중 차단기 |
KR102563167B1 (ko) * | 2021-11-24 | 2023-08-02 | 홍상우 | 비상탈출장치 |
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- 2006-02-10 US US11/658,169 patent/US7777601B2/en not_active Expired - Fee Related
- 2006-02-10 WO PCT/JP2006/302342 patent/WO2006114926A1/ja not_active Application Discontinuation
- 2006-02-10 KR KR1020077001003A patent/KR100846277B1/ko active IP Right Grant
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108807092A (zh) * | 2017-05-04 | 2018-11-13 | 周思雨 | 一种微型断路器及其突合动触头组件 |
CN108807092B (zh) * | 2017-05-04 | 2024-05-14 | 周思雨 | 一种微型断路器及其突合动触头组件 |
Also Published As
Publication number | Publication date |
---|---|
EP1873806A4 (en) | 2011-04-20 |
US20080289943A1 (en) | 2008-11-27 |
EP1873806A1 (en) | 2008-01-02 |
KR20070062495A (ko) | 2007-06-15 |
KR100846277B1 (ko) | 2008-07-16 |
US7777601B2 (en) | 2010-08-17 |
EP1873806B1 (en) | 2013-09-18 |
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