WO2020184298A1 - Procédé de fabrication de disjoncteur - Google Patents

Procédé de fabrication de disjoncteur Download PDF

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Publication number
WO2020184298A1
WO2020184298A1 PCT/JP2020/008924 JP2020008924W WO2020184298A1 WO 2020184298 A1 WO2020184298 A1 WO 2020184298A1 JP 2020008924 W JP2020008924 W JP 2020008924W WO 2020184298 A1 WO2020184298 A1 WO 2020184298A1
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WO
WIPO (PCT)
Prior art keywords
piece
movable
terminal
movable piece
contact
Prior art date
Application number
PCT/JP2020/008924
Other languages
English (en)
Japanese (ja)
Inventor
孝太 八木
大輔 佐中
将起 吉岡
Original Assignee
ボーンズ株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ボーンズ株式会社 filed Critical ボーンズ株式会社
Priority to CN202080017609.3A priority Critical patent/CN113508448A/zh
Publication of WO2020184298A1 publication Critical patent/WO2020184298A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting

Definitions

  • the present invention relates to a method for manufacturing a small breaker suitable for use in a safety circuit of an electric device.
  • a configuration is adopted in which a terminal piece or the like is insert-molded into the case body, and a movable piece is connected to the terminal piece exposed from the opening of the case body.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a breaker capable of satisfactorily connecting a terminal piece and a movable piece regardless of a case body to be miniaturized.
  • the present invention includes a fixed contact, a movable piece having a movable contact at an elastic portion and one end of the elastic portion, and pressing the movable contact against the fixed contact to bring them into contact with each other, and a terminal piece connected to the movable piece.
  • a heat-responsive element that shifts the state of the movable piece from a conductive state in which the movable contact contacts the fixed contact to a blocking state in which the movable contact is separated from the fixed contact by deforming with a temperature change.
  • a first case having an opening for accommodating the fixed contact, the movable piece, the terminal piece, and the heat-responsive element, and a second case attached to the first case to close the opening.
  • a method for manufacturing a breaker provided, wherein the first step of arranging the fixed contact and the heat-responsive element in the first case, and the movable piece and the terminal piece are integrated to form a composite piece. It includes a second step, a third step of arranging the composite piece in the first case, and a fourth step of sandwiching and fixing the composite piece between the first case and the second case.
  • the movable piece and the terminal piece are made of different materials from each other.
  • the movable piece and the terminal piece have different thicknesses from each other.
  • the movable piece and the terminal piece are integrated by laser welding, resistance welding or ultrasonic welding in the second step.
  • the movable piece and the terminal piece are welded at a plurality of places in the second step.
  • the movable piece and the terminal piece are integrated by brazing, caulking or screwing in the second step.
  • the movable piece in the third step, is located closer to the heat-responsive element than the terminal piece in the thickness direction of the composite piece. It is desirable that the movable piece and the terminal piece are integrated in the two steps.
  • the manufacturing method of the present invention includes the second step of integrating the movable piece and the terminal piece to form the composite piece.
  • This second step is performed prior to the third step of arranging the composite piece in the first case. That is, the terminal piece is integrated with the movable piece before being arranged in the first case to form the composite piece. Therefore, the movable piece and the terminal piece can be easily and surely integrated without being bothered by the existence of the first case. As a result, even when the terminal piece, the movable piece, and the first case become smaller due to the miniaturization of the breaker, the terminal piece and the movable piece can be satisfactorily connected. Become.
  • FIG. 5 is a cross-sectional view showing still another modification of the composite piece formed in the second step of the present manufacturing method.
  • FIG. 5 is a cross-sectional view showing still another modification of the composite piece formed in the second step of the present manufacturing method.
  • FIG. 5 is a cross-sectional view showing still another modification of the composite piece formed in the second step of the present manufacturing method.
  • FIG. 1 to 3 show the configuration of the breaker 1 manufactured by the present invention.
  • the breaker 1 is mounted on an electric device or the like to protect the electric device from an excessive temperature rise or overcurrent.
  • the breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 having a movable contact 41 at one end, a heat-responsive element 5 that deforms with a change in temperature, and a PTC (Positive Temperature Coefficient) thermistor 6. It is composed of a fixed piece 2, a movable piece 4, a heat-responsive element 5, a case 10 for accommodating a PTC thermistor 6, and the like.
  • the case 10 is composed of a case body (first case) 7, a lid member (second case) 8 mounted on the upper surface of the case body 7, and the like.
  • the fixed piece 2 is formed by, for example, pressing a metal plate containing copper or the like as a main component (in addition, a metal plate such as a copper-titanium alloy, nickel silver, brass, etc.), and is formed by insert molding into the case body 7. It is embedded.
  • a terminal 22 electrically connected to an external circuit is formed on one end side of the fixed piece 2, and a support portion 23 for supporting the PTC thermistor 6 is formed on the other end side.
  • the PTC thermistor 6 is placed on a convex protrusion (dowel) 24 formed at three positions on the support portion 23 of the fixed piece 2 and supported by the protrusion 24.
  • the fixed contact 21 is formed at a position facing the movable contact 41 by clad, plating or coating of a highly conductive material such as a copper-silver alloy or a gold-silver alloy in addition to silver, nickel and nickel-silver alloy. , It is exposed from a part of the opening 73a formed inside the case body 7.
  • the terminal 22 protrudes outward from the edge of the case body 7.
  • the support portion 23 is exposed from the opening 73d formed inside the case body 7.
  • the surface on the side where the fixed contact 21 is formed (that is, the upper surface in FIG. 1) is referred to as the A surface, and the surface on the opposite side is referred to as the B surface in the fixed piece 2. doing.
  • the A surface faces the first direction
  • the B side faces the second direction.
  • the terminal piece 3 is formed of a metal plate containing copper or the like as a main component.
  • a terminal 32 electrically connected to an external circuit is formed on one end side of the terminal piece 3, and a connecting portion 33 electrically connected to the movable piece 4 is formed on the other end side.
  • the terminal 32 protrudes outward from the edge of the case body 7.
  • the connecting portion 33 is electrically connected to the movable piece 4.
  • the movable piece 4 is formed in an arm shape symmetrical with respect to the center line in the longitudinal direction by pressing a plate-shaped metal material containing copper or the like as a main component.
  • a movable contact 41 is formed at one end of the movable piece 4 in the longitudinal direction.
  • the movable contact 41 is formed of, for example, a material equivalent to that of the fixed contact 21, and is joined to one end of the movable piece 4 by a method such as welding, clad, or crimping.
  • a connecting portion 42 that is electrically connected to the connecting portion 33 of the terminal piece 3 is formed at the other end of the movable piece 4.
  • the A surface of the connection portion 33 of the terminal piece 3 and the B surface of the connection portion 42 of the movable piece 4 are fixed by welding, for example.
  • the B surface of the connecting portion 33 is in contact with the case body 7, and the A surface of the connecting portion 42 is in contact with the lid member 8.
  • the movable piece 4 and the terminal piece 3 are sandwiched and fixed by the case body 7 and the lid member 8.
  • the movable piece 4 has an elastic portion 43 between the movable contact 41 and the connecting portion 42.
  • the elastic portion 43 extends from the connecting portion 42 to the side of the movable contact 41.
  • the movable piece 4 is a connecting portion 42 on the base end side of the elastic portion 43, and is cantilevered by the case 10 and the terminal piece 3, and in that state, the elastic portion 43 elastically deforms to the tip portion of the elastic portion 43.
  • the formed movable contact 41 is pressed against the fixed contact 21 and comes into contact with each other, so that the fixed piece 2 and the movable piece 4 can be energized. Since the movable piece 4 and the terminal piece 3 are electrically connected to each other, the fixed piece 2 and the terminal piece 3 can be energized.
  • the movable piece 4 is curved or bent by press working in the elastic portion 43.
  • the degree of bending or bending is not particularly limited as long as the heat-responsive element 5 can be accommodated, and may be appropriately set in consideration of the elastic force at the operating temperature and the return temperature, the pressing force of the contact, and the like.
  • a pair of protrusions (contact portions) 44a and 44b are formed on the B surface of the elastic portion 43 so as to face the heat-responsive element 5. The protrusions 44a and 44b come into contact with the heat-responsive element 5, and the deformation of the heat-responsive element 5 is transmitted to the elastic portion 43 via the protrusions 44a and 44b (see FIGS. 1, 2 and 3).
  • the heat-responsive element 5 shifts the state of the movable piece 4 from the conductive state in which the movable contact 41 contacts the fixed contact 21 to the cutoff state in which the movable contact 41 is separated from the fixed contact 21.
  • the heat-responsive element 5 is formed in a plate shape by laminating thin plate materials having different coefficients of thermal expansion, and has an initial shape with a curved cross section in an arc shape. When the reversing operating temperature is reached due to overheating, the curved shape of the heat responding element 5 reversely warps with a snap motion, and is restored when it falls below the normal rotation return temperature due to cooling.
  • the initial shape of the heat-responsive element 5 can be formed by press working.
  • the material and shape of the heat-responsive element 5 are particularly limited as long as the elastic portion 43 of the movable piece 4 is pushed up by the reverse warp deformation of the heat-responsive element 5 at the desired temperature and is restored by the elastic force of the elastic portion 43. Although it is not, a rectangular shape is desirable from the viewpoint of productivity and efficiency of reverse warp deformation.
  • the material of the heat-responsive element 5 two kinds of materials having different coefficients of thermal expansion, which are made of various alloys such as nickel silver, brass, and stainless steel, are used in combination according to the required conditions.
  • a combination of a copper-nickel-manganese alloy on the high expansion side and an iron-nickel alloy on the low expansion side is desirable.
  • a combination of an iron-nickel-chromium alloy on the high expansion side and an iron-nickel alloy on the low expansion side can be mentioned.
  • a combination of an iron-nickel-chromium alloy on the high expansion side and an iron-nickel-cobalt alloy on the low expansion side can be mentioned.
  • the PTC thermistor 6 conducts the fixed piece 2 and the movable piece 4 when the movable piece 4 is in the cutoff state.
  • the PTC thermistor 6 is arranged between the fixed piece 2 and the heat-responsive element 5. That is, the support portion 23 of the fixing piece 2 is located directly below the heat-responsive element 5 with the PTC thermistor 6 interposed therebetween.
  • the type can be selected according to the needs such as operating current, operating voltage, operating temperature, and recovery temperature.
  • the material and shape are not particularly limited as long as these properties are not impaired.
  • a ceramic sintered body containing barium titanate, strontium titanate, or calcium titanate is used.
  • a so-called polymer PTC in which conductive particles such as carbon are contained in the polymer may be used.
  • the case body 7 and the lid member 8 constituting the case 10 are molded from a thermoplastic resin such as flame-retardant polyamide, polyphenylene sulfide (PPS) having excellent heat resistance, a liquid crystal polymer (LCP), and polybutylene terephthalate (PBT). Has been done.
  • a material other than the resin may be applied as long as the characteristics equal to or higher than those of the above-mentioned resin can be obtained.
  • the case body 7 is formed with a recess 73, which is an internal space for accommodating a movable piece 4, a heat-responsive element 5, a PTC thermistor 6, and the like.
  • the recess 73 has openings 73a and 73b for accommodating the movable piece 4, an opening 73c for accommodating the movable piece 4 and the heat-responsive element 5, an opening 73d for accommodating the PTC thermistor 6, and the like. ing.
  • the movable piece 4 and the edge of the heat-responsive element 5 incorporated in the case body 7 are brought into contact with each other by the frame forming the recess 73, and are guided when the heat-responsive element 5 is deformed in the reverse direction.
  • the lid member 8 is configured to cover the recess 73.
  • the lid member 8 may be in a form that covers at least a part of the recess 73.
  • a cover piece 81 made of a metal plate or stainless steel containing copper or the like as a main component may be embedded in the lid member 8 by insert molding.
  • the cover piece 81 appropriately contacts the A surface of the movable piece 4, regulates the movement of the movable piece 4, and increases the rigidity and strength of the lid member 8 and thus the case 10 as a housing to reduce the size of the breaker 1. To contribute.
  • the lid member closes the openings 73a, 73b, 73c, etc. of the case body 7 accommodating the fixed piece 2, the terminal piece 3, the movable piece 4, the heat responding element 5, the PTC thermistor 6, and the like. 8 is attached to the case body 7.
  • the case body 7 and the lid member 8 are joined by, for example, ultrasonic welding.
  • FIG. 2 shows the operation of the breaker 1 in a normal charging or discharging state.
  • the heat-responsive element 5 maintains the initial shape before the reverse warp.
  • the movable contact 41 is pressed toward the fixed contact 21 by the elastic portion 43, the movable contact 41 and the fixed contact 21 come into contact with each other, and the fixed piece 2 and the terminal of the breaker 1 are brought into contact with each other via the elastic portion 43 of the movable piece 4.
  • the piece 3 and the piece 3 are made conductive.
  • the elastic portion 43 of the movable piece 4 and the heat-responsive element 5 may be in contact with each other.
  • the terminal piece 3, the movable piece 4, the heat-responsive element 5, the PTC thermistor 6 and the fixed piece 2 are conducting as a circuit.
  • the resistance of the PTC thermistor 6 is overwhelmingly larger than the resistance of the movable piece 4, the current flowing through the PTC thermistor 6 is substantially larger than the amount flowing through the fixed contact 21 and the movable contact 41. It can be ignored.
  • FIG. 3 shows the operation of the breaker 1 in an overcharged state or an abnormal state.
  • the heat-responsive element 5 that has reached the reversing operating temperature deforms in the reverse direction and comes into contact with the elastic portion 43 of the movable piece 4, and the elastic portion 43 is pushed up to reach the fixed contact 21 and the movable contact. It is separated from 41. At this time, the current flowing between the fixed contact 21 and the movable contact 41 is cut off.
  • the heat-responsive element 5 comes into contact with the movable piece 4, and a small leakage current flows through the heat-responsive element 5 and the PTC thermistor 6.
  • the PTC thermistor 6 conducts the fixed piece 2 and the movable piece 4 via the heat-responsive element 5 that shifts the movable piece 4 to the cutoff state.
  • the PTC thermistor 6 continues to generate heat as long as such a leakage current flows, and the resistance value is drastically increased while maintaining the heat responding element 5 in a reverse warp state. Therefore, the current is a path between the fixed contact 21 and the movable contact 41.
  • This manufacturing method includes a first step to a fourth step.
  • FIG. 4 shows the first step.
  • the fixed contact 21, the PTC thermistor 6, and the heat-responsive element 5 are arranged in the case body 7.
  • the first step of the present embodiment includes a step of forming a fixed contact 21 on the fixed piece 2, a step of inserting the fixed piece 2 into the mold, and a step of injecting a resin material into the cavity space to form the case body 7. It includes a step of forming.
  • openings 73c and 73d are formed in the case body 7.
  • the PTC thermistor 6 is arranged in the case body 7 from the opening 73d and the heat-responsive element 5 is arranged in the recess 73 from the opening 73c.
  • FIG. 5 shows the second step.
  • the movable piece 4 and the terminal piece 3 are integrated to form the composite piece 9.
  • the movable piece 4 and the terminal piece 3 constituting the composite piece 9 are prepared in separate pre-processes.
  • the terminal piece 3 is integrated with the movable piece 4 before being arranged in the case main body 7, and the composite piece 9 is formed.
  • a jig or the like for positioning and fixing the movable piece 4 and the terminal piece 3 is appropriately used.
  • FIG. 6 shows the third step.
  • the composite piece 9 is arranged in the case body 7.
  • the composite piece 9 is arranged in the case main body 7 from the openings 73a, 73b, 73c formed in the case main body 7 in the first step, and is housed in the recess 73.
  • the composite piece 9 in which the movable piece 4 and the terminal piece 3 of the present invention are integrated can be arranged in the case body 7 in the same manner as the movable piece started in WO2011 / 105175, for example.
  • FIG. 7 shows the fourth step.
  • the lid member 8 is attached to the case body 7.
  • the composite piece 9 is sandwiched between the case body 7 and the lid member 8. Then, when the case body 7 and the lid member 8 are fixed by ultrasonic welding or the like, the composite piece 9 is fixed by the case body 7 and the lid member 8.
  • the manufacturing method of the present invention includes a second step of integrating the movable piece 4 and the terminal piece 3 to form the composite piece 9.
  • the second step is executed prior to the third step of arranging the composite piece 9 in the case body 7. That is, the terminal piece 3 is integrated with the movable piece 4 before being arranged in the case main body 7, and the composite piece 9 is formed. Therefore, the movable piece 4 and the terminal piece 3 can be easily and surely integrated without being bothered by the existence of the case body 7. As a result, even when the terminal piece 3, the movable piece 4, and the case body 7 become smaller due to the miniaturization of the breaker 1, the terminal piece 3 and the movable piece 4 can be satisfactorily connected. ..
  • the second step can be executed on a separate line independent of the first step and the third step in which each part is arranged on the case body 7. That is, the integration of the terminal piece 3 and the movable piece 4 can be carried out on a line independent of the first step and the third step by using equipment such as a jig suitable for integrating the two. As a result, even when the terminal piece 3, the movable piece 4, and the case body 7 become smaller due to the miniaturization of the breaker 1, the terminal piece 3 and the movable piece 4 can be satisfactorily connected. ..
  • first step and the second step can be executed at the same time, that is, in parallel.
  • first step, the third step, and the fourth step may be executed on a series of lines, and the second step may be executed simultaneously on lines in different lanes. Therefore, the effect on the productivity of the breaker 1 is small.
  • the movable piece 4 and the terminal piece 3 can be made of different materials from each other.
  • the movable piece 4 may be made of a material having excellent conductivity
  • the terminal piece 3 may be made of a material in consideration of connection with a tab lead or the like constituting an external circuit, corrosion, or the like.
  • the movable piece 4 and the terminal piece 3 with plate materials having different thicknesses from each other.
  • a composite piece 9 having a thickness of the terminal piece 3 larger than the thickness of the movable piece 4 or a composite piece 9 having a thickness of the terminal piece 3 smaller than the thickness of the movable piece 4 can be easily formed.
  • the resistance value of the terminal piece 3 is reduced and the voltage drop is suppressed.
  • the contact pressure between the fixed contact 21 and the movable contact 41 is easily increased, and the contact resistance between the two is suppressed.
  • the thickness of the movable piece 4 By setting the thickness of the movable piece 4 to be small, the heat-responsive element 5 having a small pushing force can be applied, and the temperature characteristics of the heat-responsive element 5 can be easily improved.
  • the movable piece 4 and the terminal piece 3 are integrated by a welding method.
  • the type of welding include laser welding, resistance welding, ultrasonic welding and the like.
  • the movable piece 4 and the terminal piece 3 are firmly integrated in a short time.
  • the movable piece 4 and the terminal piece 3 are integrated in a state independent of other parts. Therefore, when the movable piece 4 and the terminal piece 3 are integrated by laser welding, the laser beam can be irradiated from either the A side of the movable piece 4 or the B side of the terminal piece 3.
  • the movable piece 4 and the terminal piece 3 are welded at a plurality of places. As a result, the movable piece 4 and the terminal piece 3 are more firmly integrated.
  • the degree of freedom of the welded portion is high, and a plurality of welded portions can be easily set.
  • the method of integration in the second process is not limited to welding.
  • the movable piece 4 and the terminal piece 3 may be integrated by brazing, caulking, or screwing.
  • connection portions 33 and 42 are housed in the case 10.
  • the connecting portions 33 and 42 may be configured to extend toward the terminal 32 and project to the outside of the case 10 together with the terminal 32. With such a configuration, the movable piece 4 and the terminal piece 3 are more firmly integrated.
  • FIG. 8 shows a composite piece 9A which is a modified example of the composite piece 9 formed in the second step of the present manufacturing method.
  • the above-described configuration of the composite piece 9 may be adopted for a portion of the composite piece 9A that is not described below.
  • the composite piece 9A is different from the composite piece 9 in that the terminal piece 3A having the step-bent portion 35 bent in a stepped manner is applied between the terminal 32 and the connection portion 33.
  • the step bent portion 35 is formed by, for example, press working. After the step bending portion 35 is formed on the terminal piece 3A, the movable piece 4 and the terminal piece 3A are integrated. After the movable piece 4 and the terminal piece 3A are integrated, the step bending portion 35 may be formed on the terminal piece 3A.
  • FIG. 9 shows a composite piece 9B which is another modification of the composite piece 9 formed in the second step of the present manufacturing method.
  • the configuration of the composite pieces 9 and 9A described above can be adopted for the portion of the composite piece 9B that is not described below.
  • the composite piece 9B is different from the composite piece 9A in that the connecting portion 33 connected to the movable piece 4B extends beyond the step bending portion 35 toward the terminal 32. That is, the step bending portion 35 is formed in the connecting portion 33.
  • the connecting portion 42 of the movable piece 4B also extends toward the terminal 32, and the step bending portion 45 is formed in the connecting portion 42.
  • the step bent portions 35 and 45 are formed by, for example, press working. It is desirable that the movable piece 4B and the terminal piece 3B are integrated after the step bending portion 35 is formed on the terminal piece 3B and the step bending portion 45 is formed on the movable piece 4B. After the movable piece 4B and the terminal piece 3B are integrated, the step bending portions 35 and 45 may be formed on the composite piece 9B.
  • the step bending portions 35 and 45 may be arranged on the case main body 7 in the third step, or may be arranged so as to project to the outside of the case main body 7 together with the terminals 32.
  • FIG. 10 shows a composite piece 9C which is still another modification of the composite piece 9 formed in the second step of the present manufacturing method.
  • the configuration of the composite pieces 9, 9A, and 9B described above may be adopted for the portion of the composite piece 9C that is not described below.
  • the composite piece 9C is different from the composite piece 9 and the like in that the movable piece 4C is located closer to the heat-responsive element 5 than the terminal piece 3C in the thickness direction. That is, the B surface of the connecting portion 33 of the terminal piece 3C and the A surface of the connecting portion 42 of the movable piece 4C are fixed by welding or the like. Along with this, the A surface of the connecting portion 33 is in contact with the lid member 8, and the B surface of the connecting portion 42 is in contact with the case body 7.
  • the composite piece 9C is formed by exchanging the arrangement of the movable piece 4C and the terminal piece 3C in the second step and integrating the two.
  • the movable piece 4C can be mounted at a low position inside the breaker 1, and the breaker 1 can be easily lowered in height. ..
  • FIGS. 11 and 12 show composite pieces 9D and 9E, which are still another modification of the composite piece 9 formed in the second step of the present manufacturing method.
  • the above-described configuration of the composite pieces 9 and 9A can be adopted for a portion not described below.
  • a curved portion 46 bent so that the B surface of the movable piece 4D is located inside is formed between the connecting portion 42 of the movable piece 4D and the elastic portion 43.
  • the connecting portion 42 projects toward the case body 7 (lower side in FIG. 11) with respect to the elastic portion 43.
  • a curved portion 36 bent so that the B surface of the terminal piece 3D is located inside is formed between the connection portion 33 of the terminal piece 3D and the terminal 32.
  • a curved portion 36 bent so that the B surface of the terminal piece 3D is located inside is formed.
  • the connection portion 33 projects from the terminal 32 toward the case body 7.
  • the case body 7 into which the composite piece 9D is incorporated is formed with, for example, a recess for avoiding interference with the connecting portion 42 and the connecting portion 33.
  • the connecting portion 42 and the connecting portion 33 are connected by facing each other (that is, the A surface after both are bent). Bending of the movable piece 4D and the terminal piece 3D is performed before the second step. Then, in the second step, the heights of the A surface of the elastic portion 43 and the A surface of the terminal 32 are made uniform, and the movable piece 4D and the terminal piece 3D are integrated. As a result, the overlapping of the movable piece 4D and the terminal piece 3D in a plan view is avoided, so that the movable piece 4D can be mounted at a low position inside the breaker 1 to easily reduce the height of the breaker 1. It will be possible.
  • a curved portion 46 bent so that the A surface of the movable piece 4E is located inside is formed between the connecting portion 42 of the movable piece 4E and the elastic portion 43.
  • the connecting portion 42 projects toward the lid member 8 (upward in FIG. 12) with respect to the elastic portion 43.
  • a curved portion 36 bent so that the A surface of the terminal piece 3E is located inside is formed between the connection portion 33 of the terminal piece 3E and the terminal 32.
  • a curved portion 36 bent so that the A surface of the terminal piece 3E is located inside is formed.
  • the connecting portion 33 projects from the terminal 32 toward the lid member 8.
  • the lid member 8 in which the composite piece 9E is used is formed with, for example, a recess for avoiding interference with the connecting portion 42 and the connecting portion 33.
  • the connecting portion 42 and the connecting portion 33 are connected by facing each other (that is, the B surface after both are bent). Bending of the movable piece 4E and the terminal piece 3E is performed before the second step. Then, in the second step, the movable piece 4E and the terminal piece 3E are integrated by aligning the heights of the A surface of the elastic portion 43 and the A surface of the terminal 32. As a result, the overlapping of the movable piece 4E and the terminal piece 3E in a plan view is avoided, so that the movable piece 4E can be mounted at a low position inside the breaker 1 to easily reduce the height of the breaker 1. It will be possible.
  • the present invention is not limited to the above specific embodiment, but is modified to various embodiments. That is, the present invention is movable with at least a fixed contact 21, a movable piece 4 having a movable contact 41 at one end of the elastic portion 43 and the elastic portion 43, and pressing the movable contact 41 against the fixed contact 21 to bring them into contact with each other.
  • the movable contact 41 is separated from the fixed contact 21 from the conductive state in which the movable contact 41 contacts the fixed contact 21.
  • the manufacturing method of the present invention can be applied to a breaker in which the PTC thermistor 6 is omitted.
  • the arrangement of the PTC thermistor 6 is omitted in the first step shown in FIG.
  • the manufacturing method of the present invention can also be applied to a breaker in which the movable piece 4 and the heat-responsive element 5 are integrally formed (for example, the movable piece 4 is formed of bimetal). In this case, in the first step shown in FIG. 4, the arrangement of the heat-responsive element 5 is omitted.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Manufacture Of Switches (AREA)

Abstract

Ce procédé de fabrication d'un disjoncteur comprend : une première étape pour placer un contact fixe et un élément de réponse thermique à l'intérieur d'un corps de boîtier; une seconde étape pour intégrer une pièce mobile 4 et une pièce terminale 3 pour former une pièce composite 9; une troisième étape pour placer la pièce composite 9 à l'intérieur du corps de boîtier; et une quatrième étape pour prendre en sandwich et fixer la pièce composite 9 à l'aide du corps de boîtier et d'un élément de couvercle.
PCT/JP2020/008924 2019-03-13 2020-03-03 Procédé de fabrication de disjoncteur WO2020184298A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080017609.3A CN113508448A (zh) 2019-03-13 2020-03-03 断路器的制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019045814A JP2020149841A (ja) 2019-03-13 2019-03-13 ブレーカーの製造方法
JP2019-045814 2019-03-13

Publications (1)

Publication Number Publication Date
WO2020184298A1 true WO2020184298A1 (fr) 2020-09-17

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PCT/JP2020/008924 WO2020184298A1 (fr) 2019-03-13 2020-03-03 Procédé de fabrication de disjoncteur

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JP (1) JP2020149841A (fr)
CN (1) CN113508448A (fr)
WO (1) WO2020184298A1 (fr)

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