WO2021024700A1 - Breaker and safety circuit - Google Patents

Breaker and safety circuit Download PDF

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Publication number
WO2021024700A1
WO2021024700A1 PCT/JP2020/027095 JP2020027095W WO2021024700A1 WO 2021024700 A1 WO2021024700 A1 WO 2021024700A1 JP 2020027095 W JP2020027095 W JP 2020027095W WO 2021024700 A1 WO2021024700 A1 WO 2021024700A1
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WO
WIPO (PCT)
Prior art keywords
heat
breaker
piece
connection surface
movable
Prior art date
Application number
PCT/JP2020/027095
Other languages
French (fr)
Japanese (ja)
Inventor
勝史 浪川
Original Assignee
ボーンズ株式会社
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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
Publication of WO2021024700A1 publication Critical patent/WO2021024700A1/en

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    • 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 small breaker or the like suitable for use in a safety circuit of an electric device.
  • a breaker including a fixed contact, a movable piece having a movable contact, a terminal piece, a heat-responsive element, and a case is known (see, for example, Patent Document 1).
  • the support portion of the fixed piece functions as a heat detection portion for detecting heat outside the breaker, and in FIG. 1 of the same document, the back surface of the support portion (lower surface in FIG. 2 and the like). Is the detection surface for detecting the heat of the secondary battery or the like. That is, the detection surface is oriented in the first direction facing the heat-responsive element with respect to the movable piece.
  • the fixed piece and the terminal piece are provided with terminals at the tip portion protruding from the case, and the surface on the first direction side thereof is a connecting surface connected to an external circuit.
  • the fixed piece and the terminal piece are bent in the first direction between the edge of the case and the terminal, and the connection surface of each terminal is located on the side in the first direction with respect to the detection surface.
  • the breaker is usually arranged between the circuit board and the secondary battery to detect the heat of the secondary battery.
  • the secondary battery is arranged on the side of the component mounting surface on which the land of the circuit board is formed.
  • the detection surface is located on the circuit board side of the movable piece and the heat-responsive element, that is, on the opposite side of the secondary battery, so that the sensitivity of heat detection is high. May affect.
  • the secondary battery when the secondary battery is arranged on the opposite side of the component mounting surface, the secondary battery is located at a place separated from the detection surface by the circuit board, which affects the sensitivity of heat detection in the same manner as described above. There is a risk.
  • the present invention has been devised in view of the above circumstances, and a main object of the present invention is to provide a breaker capable of sensitively detecting the heat of a heat-sensitive detector such as a secondary battery.
  • the present invention has a plate-shaped first terminal piece having a first connection surface electrically connected to an external circuit and a fixed contact, and has a movable contact, and the movable contact is pressed against the fixed contact to be brought into contact with the fixed contact. It houses a movable piece, a heat-responsive element that operates the movable piece so that the movable contact is separated from the fixed contact by deforming with a temperature change, and the fixed contact, the movable piece, and the heat-responsive element.
  • a breaker including a case for detecting heat outside the case and further including a heat detection unit for transmitting the heat to the heat-responsive element, and the heat detection unit is based on the movable piece.
  • the first terminal piece has a detection surface on the side in the first direction facing the heat-responsive element, and the first connection surface is in a second direction opposite to the first direction of the fixed contact. It has a first bend so that it is located on the side.
  • the first connection surface is arranged on the surface of the first terminal piece on the side in the first direction.
  • the first connection surface is arranged on the surface of the first terminal piece on the side in the second direction.
  • the breaker according to the present invention further includes a plate-shaped second terminal piece having a second connecting surface electrically connected to the external circuit and electrically connected to the movable piece. It is desirable that the 1 connection surface and the 2nd connection surface are arranged on the same plane.
  • the distance from the fixed contact to the first connecting surface is equal to or greater than the distance from the fixed contact to the edge of the case, with the second direction as the positive direction. Is desirable.
  • the first terminal piece contains silver or tin as a main component on both sides of the first direction and the second direction at least in a region where the first connection surface is formed. It is desirable that a plating layer is formed.
  • the heat detection unit is integrally formed with the first terminal piece, and the detection surface is exposed to the outside of the case.
  • the present invention is a safety circuit that constitutes the external circuit and includes a circuit board on which the breaker is mounted and a heat-received detector whose heat is detected by the heat detection unit.
  • the breaker is the heat.
  • the detection unit is arranged so as to face the heat-received detector.
  • the circuit board has a third connection surface to which the first connection surface is connected, and the third connection surface is arranged so as to face the heat-received detector. It is desirable to be there.
  • the circuit board penetrates the third connection surface to which the first connection surface is connected and the circuit board in the thickness direction, and accommodates at least a part of the case. It is desirable that the third connection surface has a hole and is arranged so as to face the heat-received detector.
  • the breaker of the present invention includes a heat detection unit for detecting heat outside the case and transferring it to the heat response element, and the heat detection unit detects the heat in the first direction facing the heat response element with respect to the movable piece.
  • the first terminal piece has a first bent portion so that the first connecting surface is located on the side in the second direction opposite to the first direction with respect to the fixed contact.
  • the perspective view before assembly which shows the schematic structure of the breaker by one Embodiment of this invention.
  • the cross-sectional view which shows the said breaker in a normal charge or discharge state.
  • the side view which shows the breaker mounted on the circuit board which is the modification of the circuit board of FIG.
  • the breaker 1 includes a pair of terminals that are partially exposed to the outside from the case 10, that is, a first terminal 22 and a second terminal 32.
  • the first terminal 22 has a first connection surface 22a that is electrically connected to an external circuit (not shown).
  • the second terminal 32 has a second connection surface 32a that is electrically connected to an external circuit.
  • the breaker 1 has a first terminal piece 2 having a fixed contact 21 and a first terminal 22, a second terminal piece 3 having a second terminal 32, and a movable contact 41 at the tip. It is composed of a movable piece 4, a heat-responsive element 5 that deforms with a change in temperature, a PTC (Positive Temperature Coefficient) thermistor 6, and the like.
  • a PTC Platinum Temperature Coefficient
  • the first terminal piece 2, the second terminal piece 3, the movable piece 4, the heat responding element 5, and the PTC thermistor 6 are housed in the case 10.
  • 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 first terminal piece 2 is formed into a plate shape by pressing, for example, 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, or brass), and is formed into a plate shape. It is embedded in 7 by insert molding.
  • the fixed contact 21 is formed 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.
  • the fixed contact 21 is formed at a position of the first terminal piece 2 facing the movable contact 41, and is exposed from a part of the opening 73a formed inside the case body 7 to the accommodating recess 73 of the case body 7. ing.
  • a first terminal 22 that is electrically connected to an external circuit is formed on one end side of the first terminal piece 2 with the fixed contact 21 interposed therebetween, and a support portion 23 that supports the PTC thermistor 6 is formed on the other end side. Is formed.
  • the first terminal 22 projects from the side wall of the case body 7, and the first connection surface 22a is connected to the land portion of the circuit board of the external circuit by a method such as soldering.
  • the side surface on which the fixed contact 21 is formed (that is, the upper surface in FIG. 1) is the A surface, and the bottom surface on the opposite side is the B surface. It is explained as. The same applies to other parts such as the second terminal piece 3, the movable piece 4, the heat-responsive element 5, the case 10, and the like.
  • the support portion 23 is exposed from a part of the opening 73d formed inside the case body 7 to the accommodating recess 73 of the case body 7, and is electrically connected to the PTC thermistor 6.
  • the first terminal piece 2 has a step bent portion 25 bent in a stepped shape (crank shape in a side view).
  • the step bending portion 25 connects the fixed contact 21 and the support portion 23, and arranges the fixed contact 21 and the support portion 23 at different heights. As a result, the PTC thermistor 6 can be stored compactly.
  • the second terminal piece 3 is formed into a plate shape by pressing a metal plate containing copper or the like as a main component, and is embedded in the case body 7 by insert molding.
  • the second terminal piece 3 has a joint portion 31 to which the movable piece 4 is joined, and a second terminal 32 that is electrically connected to an external circuit.
  • the joint portion 31 is formed on one end side of the second terminal piece 3, and the second terminal 32 is formed on the other end side of the second terminal piece 3.
  • the joint portion 31 is exposed from a part of the opening 73b formed inside the case body 7 to the accommodating recess 73 of the case body 7, and is electrically connected to the movable piece 4.
  • the second terminal 32 projects from the side wall of the case body 7, and the second connection surface 32a is connected to the land portion of the circuit board by a method such as soldering.
  • the movable piece 4 is formed in a plate shape by pressing a metal material containing copper or the like as a main component.
  • the movable piece 4 is formed in an arm shape symmetrical with respect to the center line in the longitudinal direction.
  • a movable contact 41 is formed at one end of the movable piece 4.
  • the movable contact 41 is formed on the B surface of the movable piece 4 with the same material as the fixed contact 21, and is joined to the tip end portion of the movable piece 4 by a method such as welding, clad, or crimping.
  • a joint portion 42 to be joined with the joint portion 31 of the second terminal piece 3 is formed.
  • the A surface of the joint portion 31 of the second terminal piece 3 and the B surface of the joint portion 42 of the movable piece 4 are fixed by, for example, laser welding.
  • Laser welding is a welding method in which works are joined together by irradiating the works (corresponding to the second terminal piece 3 and the movable piece 4 in this embodiment) with laser light and locally melting and solidifying the works. is there.
  • a laser welding mark having a form different from the welding mark by another welding method (for example, resistance welding using Joule heat) is formed.
  • the movable piece 4 has an elastic portion 43 between the movable contact 41 and the joint portion 42.
  • the elastic portion 43 extends from the joint portion 42 to the side of the movable contact 41.
  • the joint portion 42 is provided on the side opposite to the movable contact 41 with the elastic portion 43 interposed therebetween.
  • the movable piece 4 is fixed by being fixed to the joint portion 31 of the second terminal piece 3 at the joint portion 42, and the movable contact 41 formed at the tip thereof is fixed contact 21 by elastically deforming the elastic portion 43.
  • the first terminal piece 2 and the movable piece 4 can be energized by being pressed against the side of the surface. Since the movable piece 4 and the second terminal piece 3 are electrically connected at the joint portion 31 and the joint portion 42, the first terminal piece 2 and the second 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 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 has an initial shape curved in an arc shape, and is formed by laminating thin plate materials having different coefficients of thermal expansion. When the operating temperature is reached due to overheating, the curved shape of the heat-responsive element 5 reversely warps with a snap motion, and is restored when the temperature drops below the 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 operation of the heat-responsive element 5 at the desired temperature and is restored by the elastic force of the elastic portion 43.
  • a rectangular shape is desirable, and a rectangular shape close to a square is desirable in order to efficiently push up the elastic portion 43 while being small.
  • the material of the thermal reaction element 5 for example, nickel silver-brass, stainless steel such as copper-nickel-manganese alloy or nickel-chromium-iron alloy on the high expansion side and iron-nickel alloy on the low expansion side. Two types of materials having different coefficients of thermal expansion, which are made of various alloys such as steel, are laminated and used in combination according to required conditions.
  • the first direction D1 and the first direction in the thickness direction of the breaker 1 toward the heat-responsive element 5 with respect to the movable piece 4 that is, the downward direction in FIG. 1).
  • the direction opposite to the direction D1 is defined as the second direction D2.
  • the PTC thermistor 6 conducts the first terminal piece 2, the second terminal piece 3, and the movable piece 4 when the movable piece 4 is in the cutoff state.
  • the PTC thermistor 6 is arranged between the support portion 23 of the first terminal piece 2 and the heat-responsive element 5.
  • the current flowing through the PTC thermistor 6 increases. If the PTC thermistor 6 is a positive characteristic thermistor whose resistance value increases as the temperature rises and limits the current, 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 thermoplastic resin such as flame-retardant polyamide, polyphenylene sulfide (PPS) having excellent heat resistance, a liquid crystal polymer (LCP), and polybutylene terephthalate (PBT).
  • PPS polyphenylene sulfide
  • LCP liquid crystal polymer
  • PBT polybutylene terephthalate
  • the case body 7 is formed with a storage recess 73, which is an internal space for housing the movable piece 4, the heat-responsive element 5, the PTC thermistor 6, and the like.
  • the accommodating 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. doing.
  • the edge of the heat-responsive element 5 incorporated in the case body 7 is appropriately abutted by a frame formed inside the accommodating recess 73, and is guided when the heat-responsive element 5 is warped in the reverse direction.
  • a cover piece 9 is embedded in the lid member 8 by insert molding (see FIG. 2).
  • the cover piece 9 is formed into a plate shape by pressing a metal containing copper or the like as a main component or a metal such as stainless steel as described above.
  • the cover piece 9 appropriately abuts on the A surface of the movable piece 4 to regulate the movement of the movable piece 4, and the rigidity of the lid member 8 and thus the case 10 as a housing. It contributes to the miniaturization of the breaker 1 while increasing the strength.
  • the lid member 8 closes the openings 73a, 73b, 73c, etc. of the case body 7 accommodating the fixed contact 21, the movable piece 4, the heat responding element 5, the PTC thermistor 6, and the like. It is attached to the case body 7.
  • the case body 7 and the lid member 8 are joined by, for example, ultrasonic welding. At this time, the case body 7 and the lid member 8 are continuously joined over the entire circumference of each outer edge portion, and the airtightness of the case 10 is improved.
  • the internal space of the case 10 provided by the accommodating recess 73 is sealed, and parts such as the movable piece 4, the heat-responsive element 5, and the PTC thermistor 6 can be shielded from the outside atmosphere of the case 10 and protected.
  • FIG. 2 shows the operation of the breaker 1 in a normal charging or discharging state.
  • the heat-responsive element 5 maintains its initial shape (before reverse warpage).
  • the cover piece 9 is provided with a protruding portion 91 that comes into contact with the top portion 43a of the movable piece 4 and presses the top portion 43a toward the heat-responsive element 5.
  • the protruding portion 91 presses the top portion 43a
  • the elastic portion 43 is elastically deformed, and the movable contact 41 formed at the tip thereof is pressed toward the fixed contact 21 and comes into contact with the elastic portion 43.
  • the first terminal piece 2 and the second terminal piece 3 of the breaker 1 are electrically connected to each other through the elastic portion 43 of the movable piece 4.
  • the elastic portion 43 of the movable piece 4 and the heat-responsive element 5 may come into contact with each other, and the movable piece 4, the heat-responsive element 5, the PTC thermistor 6, and the first terminal piece 2 may be electrically connected as a circuit.
  • 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 operating temperature reversely warps, and the elastic portion 43 of the movable piece 4 is pushed up to separate the fixed contact 21 and the movable contact 41.
  • the operating temperature of the heat-responsive element 5 when the heat-responsive element 5 is deformed inside the breaker 1 and pushes up the movable piece 4 is, for example, 70 ° C. to 90 ° C.
  • the current flowing between the fixed contact 21 and the movable contact 41 is cut off, and a small leakage current flows through the heat-responsive element 5 and the PTC thermistor 6.
  • 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. There is only a small amount of leakage current as described above (which constitutes a self-holding circuit). This leakage current can be used for other functions of the safety device. In the present embodiment, the contact between the top portion 43a and the protruding portion 91 is maintained even in a situation where the heat-responsive element 5 that has reached the operating temperature is reversely warped and deformed.
  • the movable piece 4 is pushed up with the contact point between the top portion 43a and the protruding portion 91 as a fulcrum, and the distance between the fixed contact 21 and the movable contact 41 is easily maintained. Further, since the movable piece 4 is supported by the protruding portion 91 and the protruding portion 91 bears a part of the pushing force of the heat-responsive element 5, the force applied to the joint portion 42 of the movable piece 4 is suppressed, and the joint portion 31 is suppressed. The peeling of the joint portion 42 from the joint portion 42 is suppressed.
  • FIG. 4 shows the breaker 1 mounted on the circuit board 100.
  • the circuit board 100 forms a part of the external circuit of the breaker 1 by forming the lands 102 and 103 on the surface of the base material 101.
  • the lands 102 and 103 are formed on the component mounting surface 104 on which components such as the breaker 1 are mounted. Parts (not shown) other than the breaker 1 are appropriately mounted on the component mounting surface 104.
  • the component mounting surface 104 corresponds to the third connection surface 104a to which the first connection surface 22a of the breaker 1 is connected.
  • the circuit board 100 of this embodiment is arranged so that the component mounting surface 104 faces the secondary battery 200. Therefore, the third connection surface 104a is arranged so as to face the secondary battery 200.
  • the circuit board 100 is provided parallel to the surface of the secondary battery 200 with a gap 105, and the breaker 1 is arranged in the gap 105.
  • a safety circuit is composed of a breaker 1, a circuit board 100, a secondary battery 200, and the like.
  • the first terminal piece 2 and the second terminal piece 3 project from both end faces in the longitudinal direction of the case 10 of the breaker 1, and the first terminal 22 and the second terminal 32 are provided at the respective tip portions.
  • the first connection surface 22a of the first terminal 22 is connected to the land 102, and the second connection surface 32a of the second terminal 32 is connected to the land 103 by using solder 110 or the like, so that the breaker 1 is connected to the circuit board 100. Is implemented in.
  • the breaker 1 further includes a heat detection unit 28 for detecting heat outside the case 10.
  • the heat detection unit 28 transfers the detected heat to the heat response element 5 (see FIG. 1 and the like).
  • the heat detected by the heat detection unit 28 is transferred to the heat response element 5 via the PTC thermistor 6 directly above.
  • the heat transfer path from the heat detection unit 28 to the heat response element 5 is shortened, so that the heat response element 5 is sensitively deformed in response to the heat outside the breaker 1, and the breaker 1 causes the breaker 1.
  • the current is cut off quickly.
  • the support portion 23 of the first terminal piece 2 corresponds to the heat detection portion 28.
  • the heat detection unit 28 may be formed separately from the first terminal piece 2.
  • the first terminal piece 2 may be separated at the step bending portion 25, and the heat detection unit 28 may be composed of a component different from the first terminal piece 2.
  • the heat detection unit 28 has a detection surface 28a for detecting the heat of the secondary battery 200, which is a heat detection body.
  • the secondary battery 200 is located on the side of the breaker 1 in the first direction D1.
  • the detection surface 28a is provided on the side of the heat detection unit 28 in the first direction D1.
  • the first terminal piece 2 has a first bent portion 26 on the outside of the case 10.
  • the first bent portion 26 may be embedded inside the case 10.
  • the first bent portion 26 is formed between the fixed contact 21 and the first terminal 22.
  • the first bent portion 26 is formed so that the first connecting surface 22a is located closer to the second direction D2 than the fixed contact 21.
  • the first terminal piece 2 has a bent portion 27 between the first bent portion 26 and the first terminal 22.
  • the bent portion 27 is bent in the opposite direction to the first bent portion 26.
  • the bent portion 27 arranges the detection surface 28a of the heat detection unit 28 and the first connection surface 22a of the first terminal 22 in parallel.
  • the heat detection unit 28 has a detection surface 28a on the side of the first direction D1, and the first terminal piece 2 has the first connection surface 22a located closer to the second direction D2 than the fixed contact 21. As such, it has a first bend 26.
  • the detection surface 28a of the heat detection unit 28 faces the secondary battery 200 and is located in the vicinity thereof. Therefore, the heat of the secondary battery 200 can be detected with high sensitivity.
  • the first connection surface 22a is formed on the A surface of the first terminal 22. That is, the first connection surface 22a and the fixed contact 21 are formed on the A surface, which is the surface on the side of the second direction D2 in the first terminal piece 2.
  • the first connection surface 22a can be arranged so as to face the land 102 of the circuit board 100, and the detection surface 28a can be arranged so as to face the secondary battery 200. Therefore, the breaker 1 can be compactly mounted on the circuit board 100, and the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a.
  • the distance S1 from the fixed contact 21 to the first connection surface 22a is equal to or greater than the distance S2 from the fixed contact 21 to the edge of the case 10 with the second direction D2 as the positive direction.
  • the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a while the breaker 1 is compactly mounted on the circuit board 100 without providing an opening or the like in the circuit board 100. ..
  • the distance S1 with the second direction D2 as the positive direction has a negative value and is smaller than the distance S2.
  • the detection surface 28a is embedded inside the case 10. This makes it possible to easily improve the airtightness inside the case 10. Further, the detection surface 28a may be exposed to the outside of the case 10. For example, an opening for exposing the detection surface 28a may be provided on the B surface of the case body 7. Further, the detection surface 28a may be formed on the same plane as the B surface of the case body 7. In these forms, the detection surface 28a can detect the heat of the secondary battery 200 with even higher sensitivity.
  • the B surface or the detection surface 28a of the case body 7 is arranged in contact with the secondary battery 200 or with a slight gap. Further, as shown in FIGS. 4 and 5, even if a part of the resin constituting the case body 7 is interposed between the detection surface 28a and the secondary battery 200, the thickness of the resin is reduced. Moreover, by arranging the detection surface 28a and the secondary battery 200 close to each other, the detection surface 28a can detect the heat of the secondary battery 200 with higher sensitivity.
  • the second terminal piece 3 has a second bent portion 36 on the outside of the case 10.
  • the second bent portion 36 may be embedded inside the case 10.
  • the second bent portion 36 is formed between the joint portion 31 and the second terminal 32.
  • the second bent portion 36 is formed so that the second connecting surface 32a is located closer to the fixed contact 21 and the joint portion 31 in the second direction D2.
  • the second terminal piece 3 has a bent portion 37 between the second bent portion 36 and the second terminal 32.
  • the bent portion 37 is bent in the opposite direction to the second bent portion 36.
  • the bent portion 37 arranges the detection surface 28a of the heat detection unit 28 and the second connection surface 32a of the second terminal 32 in parallel.
  • the second connection surface 32a is formed on the A surface of the second terminal 32.
  • the second connection surface 32a can be arranged so as to face the land 103 of the circuit board 100, and the detection surface 28a can be arranged so as to face the secondary battery 200. Therefore, the breaker 1 can be compactly mounted on the circuit board 100, and the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a.
  • the first connection surface 22a and the second connection surface 32a are arranged on the same plane. That is, the height of the second connection surface 32a from the A surface of the case 10 is equal to the height of the first connection surface 22a from the A surface of the case 10.
  • the case 10 is arranged in parallel with the circuit board 100.
  • the detection surface 28a is arranged in parallel with the secondary battery 200, so that the heat of the secondary battery 200 can be detected even more sensitively.
  • FIG. 5 shows a breaker 1 mounted on the circuit board 100A, which is a modification of the circuit board 100.
  • the circuit board 100A differs from the circuit board 100 in that the component mounting surface 104 is arranged so as to face the secondary battery 200 (that is, on the A surface side of the base material 101).
  • the secondary battery 200 is arranged on the side opposite to the component mounting surface 104. Therefore, the third connection surface 104a is arranged so as to face the secondary battery 200.
  • the circuit board 100A has a through hole 106 between the land 102 and the land 103 for accommodating at least a part of the case 10 of the breaker 1.
  • the through hole 106 penetrates the base material 101 in the thickness direction.
  • the through hole 106 of the present embodiment accommodates the entire case 10 and a part of the first terminal piece 2 and the second terminal piece 3.
  • the B surface of the first terminal 22 is applied to the first connection surface 22a
  • the B surface of the second terminal 32 is applied to the second connection surface 32a.
  • the first connection surface 22a is arranged on the surface of the first terminal piece 2 on the side of the first direction D1
  • the second connection surface 32a is arranged on the surface of the second terminal piece 3 on the side of the first direction D1. Will be done.
  • the heat detection unit 28 has a detection surface 28a on the side of the first direction D1, and the first terminal piece 2 has a first connection surface 22a as a fixed contact.
  • the first bent portion 26 is provided so as to be located closer to the second direction D2 than the 21.
  • the detection surface 28a faces the secondary battery 200 and is located in the vicinity thereof. Therefore, the heat of the secondary battery 200 can be detected with high sensitivity.
  • the first terminal piece 2 has silver or tin on both sides of the A and B surfaces (that is, both sides of the first direction D1 and the second direction D2) at least in the region where the first connection surface 22a is formed. It is desirable that a plating layer containing the main component is formed. The plating layer enhances the wettability of the solder 110 and facilitates soldering to the land 102. Then, by forming the plating layers on both the A surface and the B surface of the first terminal 22, the wettability of the solder 110 regardless of whether the breaker 1 is mounted on the circuit board 100 or 100A. Is enhanced, and soldering to the land 102 becomes easy.
  • the present invention is not limited to the above-mentioned specific embodiment, but is modified to various embodiments. That is, the breaker 1 of the present invention has at least a plate-shaped first terminal piece 2 having a first connection surface 22a and a fixed contact 21 electrically connected to an external circuit, and a movable contact 41, and has a movable contact. Fixed with a movable piece 4 that presses 41 against the fixed contact 21 to bring it into contact, and a heat-responsive element 5 that operates the movable piece 4 so that the movable contact 41 is separated from the fixed contact 21 by being deformed with a temperature change.
  • a breaker 1 including a contact 21, a movable piece 4, and a case 10 for accommodating a heat-responsive element 5.
  • a heat detection unit for detecting heat outside the case 10 and transferring it to the heat-responsive element 5. 28 is further provided, the heat detection unit 28 has a detection surface 28a on the side of the first direction D1 facing the heat reaction element 5 with reference to the movable piece 4, and the first terminal piece 2 has a first connection surface. It suffices to have the first bent portion 26 so that the 22a is located on the side of the second direction D2 opposite to the first direction D1 with respect to the fixed contact 21.
  • the heat-received detector is not limited to the above-mentioned secondary battery 200.
  • it may be a heating element such as a motor.
  • the breaker 1 of the present embodiment has a self-holding circuit by the PTC thermistor 6, it can be applied even if such a configuration is omitted. It is also applicable to a breaker in which a movable piece and a heat-responsive element are integrated, for example, in a form in which the movable piece is formed of a metal material such as bimetal.
  • the present invention can also be applied to, for example, a form in which a second terminal piece and a movable piece are integrally formed, as shown in Japanese Patent Application Laid-Open No. 2013-149632.

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  • Thermally Actuated Switches (AREA)

Abstract

A breaker 1 comprises: a sheet-shaped first terminal tab 2 having a first connection face 22a and a stationary contact 21; a movable tab that presses a movable contact against the stationary contact 21 to create contact; a heat-responsive element 5 that deforms with changes in temperature to actuate the movable tab so that the movable contact separates from the stationary contact 21; and a case 10 for housing the stationary contact 21, the movable tab, and the heat-responsive element. The breaker 1 further comprises a heat-detecting part 28 that detects heat on the exterior of the case 10 and conducts the heat to the heat-responsive element. The heat-detecting part 28 has a detection face 28a on a side in a first direction D1 facing the heat-responsive element with respect to the movable tab. The first terminal tab 2 has a first bent part 26 such that the first connection face 22a is positioned further in a second direction D2, opposite the first direction D1, than the stationary contact 21.

Description

ブレーカー及び安全回路Breaker and safety circuit
　本発明は、電気機器の安全回路に用いて好適な小型のブレーカー等に関するものである。 The present invention relates to a small breaker or the like suitable for use in a safety circuit of an electric device.
　従来、固定接点、可動接点を有する可動片、端子片、熱応動素子及びケースとを備えたブレーカーが知られている（例えば、特許文献１参照）。 Conventionally, a breaker including a fixed contact, a movable piece having a movable contact, a terminal piece, a heat-responsive element, and a case is known (see, for example, Patent Document 1).
特開２０１７－０３７７５７号公報JP-A-2017-037757
　上記特許文献１に開示されているブレーカーでは、固定片の支持部がブレーカー外部の熱を検出する熱検出部として機能し、同文献の図１において、支持部の裏面（図２等において下面）が２次電池等の熱を検出するための検出面となる。すなわち、検出面は、可動片を基準として熱応動素子の方を向く第１方向に向けられている。 In the breaker disclosed in Patent Document 1, the support portion of the fixed piece functions as a heat detection portion for detecting heat outside the breaker, and in FIG. 1 of the same document, the back surface of the support portion (lower surface in FIG. 2 and the like). Is the detection surface for detecting the heat of the secondary battery or the like. That is, the detection surface is oriented in the first direction facing the heat-responsive element with respect to the movable piece.
　上記特許文献１のブレーカーでは、固定片及び端子片は、ケースから突出する先端部に端子が設けられ、その第１方向の側の面が外部回路と接続される接続面となる。固定片及び端子片は、ケースの端縁と端子との間で第１方向に曲がり、各端子の接続面は、検出面よりも第１方向の側に位置される。 In the breaker of Patent Document 1, the fixed piece and the terminal piece are provided with terminals at the tip portion protruding from the case, and the surface on the first direction side thereof is a connecting surface connected to an external circuit. The fixed piece and the terminal piece are bent in the first direction between the edge of the case and the terminal, and the connection surface of each terminal is located on the side in the first direction with respect to the detection surface.
　ところで、ブレーカーは、通常、回路基板と２次電池との間に配置され、２次電池の熱を検出する。この場合、２次電池は、回路基板のランドが形成された部品実装面の側に配置される。そうしたところ接続面が回路基板のランドに接続されると、検出面は、可動片及び熱応動素子よりも回路基板側、すなわち２次電池の逆側に位置することになるため、熱検出の感度に影響を及ぼす虞がある。 By the way, the breaker is usually arranged between the circuit board and the secondary battery to detect the heat of the secondary battery. In this case, the secondary battery is arranged on the side of the component mounting surface on which the land of the circuit board is formed. When the connection surface is connected to the land of the circuit board, the detection surface is located on the circuit board side of the movable piece and the heat-responsive element, that is, on the opposite side of the secondary battery, so that the sensitivity of heat detection is high. May affect.
　また、２次電池が部品実装面の反対側に配置された場合、検出面から回路基板を隔てた場所に２次電池が位置することとなり、上記と同様に、熱検出の感度に影響を及ぼす虞がある。 Further, when the secondary battery is arranged on the opposite side of the component mounting surface, the secondary battery is located at a place separated from the detection surface by the circuit board, which affects the sensitivity of heat detection in the same manner as described above. There is a risk.
　本発明は、以上のような実状に鑑み案出されたもので、２次電池等の被熱検出体の熱を感度よく検出できるブレーカーを提供することを主たる目的としている。 The present invention has been devised in view of the above circumstances, and a main object of the present invention is to provide a breaker capable of sensitively detecting the heat of a heat-sensitive detector such as a secondary battery.
　本発明は、外部回路と電気的に接続される第１接続面及び固定接点を有する板状の第１端子片と、可動接点を有し、前記可動接点を前記固定接点に押圧して接触させる可動片と、温度変化に伴って変形することにより前記可動接点が前記固定接点から離隔するように前記可動片を作動させる熱応動素子と、前記固定接点、前記可動片及び前記熱応動素子を収容するためのケースとを備えたブレーカーであって、前記ケース外部の熱を検出し、前記熱応動素子に伝達するための熱検出部をさらに備え、前記熱検出部は、前記可動片を基準として前記熱応動素子の方を向く第１方向の側に検出面を有し、前記第１端子片は、前記第１接続面が前記固定接点よりも前記第１方向とは反対の第２方向の側に位置するように、第１曲がり部を有する。 The present invention has a plate-shaped first terminal piece having a first connection surface electrically connected to an external circuit and a fixed contact, and has a movable contact, and the movable contact is pressed against the fixed contact to be brought into contact with the fixed contact. It houses a movable piece, a heat-responsive element that operates the movable piece so that the movable contact is separated from the fixed contact by deforming with a temperature change, and the fixed contact, the movable piece, and the heat-responsive element. A breaker including a case for detecting heat outside the case and further including a heat detection unit for transmitting the heat to the heat-responsive element, and the heat detection unit is based on the movable piece. The first terminal piece has a detection surface on the side in the first direction facing the heat-responsive element, and the first connection surface is in a second direction opposite to the first direction of the fixed contact. It has a first bend so that it is located on the side.
　本発明に係る前記ブレーカーにおいて、前記第１接続面は、前記第１端子片における前記第１方向の側の面に配されている、ことが望ましい。 In the breaker according to the present invention, it is desirable that the first connection surface is arranged on the surface of the first terminal piece on the side in the first direction.
　本発明に係る前記ブレーカーにおいて、前記第１接続面は、前記第１端子片における前記第２方向の側の面に配されている、ことが望ましい。 In the breaker according to the present invention, it is desirable that the first connection surface is arranged on the surface of the first terminal piece on the side in the second direction.
　本発明に係る前記ブレーカーにおいて、前記外部回路と電気的に接続される第２接続面を有し、前記可動片に電気的に接続されている板状の第２端子片をさらに備え、前記第１接続面と前記第２接続面とは、同一平面上に配されている、ことが望ましい。 The breaker according to the present invention further includes a plate-shaped second terminal piece having a second connecting surface electrically connected to the external circuit and electrically connected to the movable piece. It is desirable that the 1 connection surface and the 2nd connection surface are arranged on the same plane.
　本発明に係る前記ブレーカーにおいて、前記第２方向を正の方向として、前記固定接点から前記第１接続面までの距離は、前記固定接点から、前記ケースの端縁までの距離以上である、ことが望ましい。 In the breaker according to the present invention, the distance from the fixed contact to the first connecting surface is equal to or greater than the distance from the fixed contact to the edge of the case, with the second direction as the positive direction. Is desirable.
　本発明に係る前記ブレーカーにおいて、前記第１端子片は、少なくとも前記第１接続面が形成される領域において、前記第１方向及び前記第２方向の側の両面に、銀又はスズを主成分とするメッキ層が形成されている、ことが望ましい。 In the breaker according to the present invention, the first terminal piece contains silver or tin as a main component on both sides of the first direction and the second direction at least in a region where the first connection surface is formed. It is desirable that a plating layer is formed.
　本発明に係る前記ブレーカーにおいて、前記熱検出部は、前記第１端子片と一体に形成され、前記検出面は、前記ケース外部に露出している、ことが望ましい。 In the breaker according to the present invention, it is desirable that the heat detection unit is integrally formed with the first terminal piece, and the detection surface is exposed to the outside of the case.
　本発明は、前記外部回路を構成し、前記ブレーカーが実装される回路基板と、前記熱検出部によって熱が検出される被熱検出体とを含む安全回路であって、前記ブレーカーは、前記熱検出部が前記被熱検出体に対向するように、配されている。 The present invention is a safety circuit that constitutes the external circuit and includes a circuit board on which the breaker is mounted and a heat-received detector whose heat is detected by the heat detection unit. The breaker is the heat. The detection unit is arranged so as to face the heat-received detector.
　本発明に係る前記安全回路において、前記回路基板は、前記第１接続面が接続される第３接続面を有し、前記第３接続面が前記被熱検出体と対向するように配されている、ことが望ましい。 In the safety circuit according to the present invention, the circuit board has a third connection surface to which the first connection surface is connected, and the third connection surface is arranged so as to face the heat-received detector. It is desirable to be there.
　本発明に係る前記安全回路において、前記回路基板は、前記第１接続面が接続される第３接続面と、前記回路基板を厚さ方向に貫通し、前記ケースの少なくとも一部を収容する貫通穴とを有し、前記第３接続面が前記被熱検出体と背向するように配されている、ことが望ましい。 In the safety circuit according to the present invention, the circuit board penetrates the third connection surface to which the first connection surface is connected and the circuit board in the thickness direction, and accommodates at least a part of the case. It is desirable that the third connection surface has a hole and is arranged so as to face the heat-received detector.
　本発明のブレーカーは、ケース外部の熱を検出し、熱応動素子に伝達するための熱検出部を備え、熱検出部は、可動片を基準として熱応動素子の側を向く第１方向に検出面を有している。そして、第１端子片は、第１接続面が固定接点よりも第１方向とは反対の第２方向の側に位置するように、第１曲がり部を有する。これにより、回路基板と被熱検出体との間にブレーカーが配置されたとき、検出面が被熱検出体に対向し、かつその近傍に位置される。従って、被熱検出体の熱を感度よく検出できるようになる。 The breaker of the present invention includes a heat detection unit for detecting heat outside the case and transferring it to the heat response element, and the heat detection unit detects the heat in the first direction facing the heat response element with respect to the movable piece. Has a surface. The first terminal piece has a first bent portion so that the first connecting surface is located on the side in the second direction opposite to the first direction with respect to the fixed contact. As a result, when the breaker is arranged between the circuit board and the heat-received detector, the detection surface faces the heat-received detector and is located in the vicinity thereof. Therefore, the heat of the heat-received detector can be detected with high sensitivity.
本発明の一実施形態によるブレーカーの概略構成を示す組み立て前の斜視図。The perspective view before assembly which shows the schematic structure of the breaker by one Embodiment of this invention. 通常の充電又は放電状態における上記ブレーカーを示す断面図。The cross-sectional view which shows the said breaker in a normal charge or discharge state. 過充電状態又は異常時などにおける上記ブレーカーを示す断面図。A cross-sectional view showing the breaker in an overcharged state or an abnormal state. 回路基板に実装されたブレーカーを示す側面図。A side view showing a breaker mounted on a circuit board. 図４の回路基板の変形例である回路基板に実装されたブレーカーを示す側面図。The side view which shows the breaker mounted on the circuit board which is the modification of the circuit board of FIG.
　本発明の一実施形態によるブレーカーについて図面を参照して説明する。図１乃至図３は、ブレーカーの構成を示している。図１及び図３に示されるように、ブレーカー１は、一部がケース１０から外部に露出する一対の端子、すなわち第１端子２２及び第２端子３２を備える。第１端子２２は、外部回路（図示せず）と電気的に接続される第１接続面２２ａを有する。第２端子３２は、外部回路と電気的に接続される第２接続面３２ａを有する。第１端子２２及び第２端子３２が外部回路と接続されることにより、ブレーカー１は、電気機器の安全回路の主要部を構成する。 The breaker according to the embodiment of the present invention will be described with reference to the drawings. 1 to 3 show the structure of the breaker. As shown in FIGS. 1 and 3, the breaker 1 includes a pair of terminals that are partially exposed to the outside from the case 10, that is, a first terminal 22 and a second terminal 32. The first terminal 22 has a first connection surface 22a that is electrically connected to an external circuit (not shown). The second terminal 32 has a second connection surface 32a that is electrically connected to an external circuit. By connecting the first terminal 22 and the second terminal 32 to an external circuit, the breaker 1 constitutes a main part of the safety circuit of the electric device.
　図１に示されるように、ブレーカー１は、固定接点２１及び第１端子２２を有する第１端子片２と、第２端子３２を有する第２端子片３と、先端部に可動接点４１を有する可動片４と、温度変化に伴って変形する熱応動素子５と、ＰＴＣ（Positive Temperature Coefficient）サーミスター６等によって構成されている。 As shown in FIG. 1, the breaker 1 has a first terminal piece 2 having a fixed contact 21 and a first terminal 22, a second terminal piece 3 having a second terminal 32, and a movable contact 41 at the tip. It is composed of a movable piece 4, a heat-responsive element 5 that deforms with a change in temperature, a PTC (Positive Temperature Coefficient) thermistor 6, and the like.
　第１端子片２、第２端子片３、可動片４、熱応動素子５及びＰＴＣサーミスター６は、ケース１０に収容されている。ケース１０は、ケース本体（第１ケース）７とケース本体７の上面に装着される蓋部材（第２ケース）８等によって構成されている。 The first terminal piece 2, the second terminal piece 3, the movable piece 4, the heat responding element 5, and the PTC thermistor 6 are housed in the case 10. 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.
　第１端子片２は、例えば、銅等を主成分とする金属板（この他、銅－チタニウム合金、洋白、黄銅などの金属板）をプレス加工することにより板状に形成され、ケース本体７にインサート成形により埋め込まれている。 The first terminal piece 2 is formed into a plate shape by pressing, for example, 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, or brass), and is formed into a plate shape. It is embedded in 7 by insert molding.
　固定接点２１は、銀、ニッケル、ニッケル－銀合金の他、銅－銀合金、金－銀合金などの導電性の良い材料のクラッド、メッキ又は塗布等により、形成されている。固定接点２１は、第１端子片２のうち、可動接点４１に対向する位置に形成され、ケース本体７の内部に形成されている開口７３ａの一部からケース本体７の収容凹部７３に露出されている。 The fixed contact 21 is formed 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. The fixed contact 21 is formed at a position of the first terminal piece 2 facing the movable contact 41, and is exposed from a part of the opening 73a formed inside the case body 7 to the accommodating recess 73 of the case body 7. ing.
　固定接点２１を挟んで、第１端子片２の一端側には外部回路と電気的に接続される第１端子２２が形成され、他端側には、ＰＴＣサーミスター６を支持する支持部２３が形成されている。第１端子２２は、ケース本体７の側壁から突出し、第１接続面２２ａが外部回路の回路基板のランド部とはんだ付け等の手法により接続される。 A first terminal 22 that is electrically connected to an external circuit is formed on one end side of the first terminal piece 2 with the fixed contact 21 interposed therebetween, and a support portion 23 that supports the PTC thermistor 6 is formed on the other end side. Is formed. The first terminal 22 projects from the side wall of the case body 7, and the first connection surface 22a is connected to the land portion of the circuit board of the external circuit by a method such as soldering.
　本出願においては、特に断りのない限り、第１端子片２において、固定接点２１が形成されている側の面（すなわち図１において上側の面）をＡ面、その反対側の底面をＢ面として説明している。他の部品、例えば、第２端子片３、可動片４及び熱応動素子５、ケース１０等についても同様である。 In the present application, unless otherwise specified, in the first terminal piece 2, the side surface on which the fixed contact 21 is formed (that is, the upper surface in FIG. 1) is the A surface, and the bottom surface on the opposite side is the B surface. It is explained as. The same applies to other parts such as the second terminal piece 3, the movable piece 4, the heat-responsive element 5, the case 10, and the like.
　支持部２３は、ケース本体７の内部に形成されている開口７３ｄの一部からケース本体７の収容凹部７３に露出し、ＰＴＣサーミスター６と電気的に接続される。 The support portion 23 is exposed from a part of the opening 73d formed inside the case body 7 to the accommodating recess 73 of the case body 7, and is electrically connected to the PTC thermistor 6.
　図２に示されるように、第１端子片２は、階段状（側面視でクランク状）に曲げられた段曲げ部２５を有する。段曲げ部２５は、固定接点２１と支持部２３とを繋ぎ、固定接点２１と支持部２３とを高さ違いに配置する。これにより、ＰＴＣサーミスター６をコンパクトに収納可能となる。 As shown in FIG. 2, the first terminal piece 2 has a step bent portion 25 bent in a stepped shape (crank shape in a side view). The step bending portion 25 connects the fixed contact 21 and the support portion 23, and arranges the fixed contact 21 and the support portion 23 at different heights. As a result, the PTC thermistor 6 can be stored compactly.
　第２端子片３は、第１端子片２と同様に、銅等を主成分とする金属板をプレス加工することにより板状に形成され、ケース本体７にインサート成形により埋め込まれている。第２端子片３は、可動片４が接合される接合部３１と、外部回路と電気的に接続される第２端子３２とを有している。接合部３１は、第２端子片３の一端側に形成され、第２端子３２は、第２端子片３の他端側に形成されている。 Like the first terminal piece 2, the second terminal piece 3 is formed into a plate shape by pressing a metal plate containing copper or the like as a main component, and is embedded in the case body 7 by insert molding. The second terminal piece 3 has a joint portion 31 to which the movable piece 4 is joined, and a second terminal 32 that is electrically connected to an external circuit. The joint portion 31 is formed on one end side of the second terminal piece 3, and the second terminal 32 is formed on the other end side of the second terminal piece 3.
　接合部３１は、ケース本体７の内部に形成されている開口７３ｂの一部からケース本体７の収容凹部７３に露出し、可動片４と電気的に接続される。第２端子３２は、ケース本体７の側壁から突出し、第２接続面３２ａが回路基板のランド部とはんだ付け等の手法により接続される。 The joint portion 31 is exposed from a part of the opening 73b formed inside the case body 7 to the accommodating recess 73 of the case body 7, and is electrically connected to the movable piece 4. The second terminal 32 projects from the side wall of the case body 7, and the second connection surface 32a is connected to the land portion of the circuit board by a method such as soldering.
　可動片４は、銅等を主成分とする金属材料をプレス加工することにより板状に形成されている。可動片４は、長手方向の中心線に対して対称なアーム状に形成されている。 The movable piece 4 is formed in a plate shape by pressing a metal material containing copper or the like as a main component. The movable piece 4 is formed in an arm shape symmetrical with respect to the center line in the longitudinal direction.
　可動片４の一端部には、可動接点４１が形成されている。可動接点４１は、固定接点２１と同等の材料によって可動片４のＢ面に形成され、溶接の他、クラッド、かしめ（crimping）等の手法によって可動片４の先端部に接合されている。 A movable contact 41 is formed at one end of the movable piece 4. The movable contact 41 is formed on the B surface of the movable piece 4 with the same material as the fixed contact 21, and is joined to the tip end portion of the movable piece 4 by a method such as welding, clad, or crimping.
　可動片４の他端部には、第２端子片３の接合部３１と接合される接合部４２が形成されている。第２端子片３の接合部３１のＡ面と可動片４の接合部４２のＢ面とは、例えば、レーザー溶接によって固着されている。これにより、第２端子片３と可動片４とが電気的に接続される。レーザー溶接とは、レーザー光をワーク（本実施形態では、第２端子片３及び可動片４が相当）に照射し、ワークを局部的に溶融及び凝固させることによってワーク同士を接合する溶接手法である。レーザー光が照射されたワークの表面には、他の溶接手法（例えば、ジュール熱を利用する抵抗溶接）による溶接痕とは異なる形態のレーザー溶接痕が形成される。 At the other end of the movable piece 4, a joint portion 42 to be joined with the joint portion 31 of the second terminal piece 3 is formed. The A surface of the joint portion 31 of the second terminal piece 3 and the B surface of the joint portion 42 of the movable piece 4 are fixed by, for example, laser welding. As a result, the second terminal piece 3 and the movable piece 4 are electrically connected. Laser welding is a welding method in which works are joined together by irradiating the works (corresponding to the second terminal piece 3 and the movable piece 4 in this embodiment) with laser light and locally melting and solidifying the works. is there. On the surface of the work irradiated with the laser beam, a laser welding mark having a form different from the welding mark by another welding method (for example, resistance welding using Joule heat) is formed.
　可動片４は、可動接点４１と接合部４２との間に、弾性部４３を有している。弾性部４３は、接合部４２から可動接点４１の側に延出されている。これにより、接合部４２は、弾性部４３を挟んで可動接点４１とは反対側に設けられる。 The movable piece 4 has an elastic portion 43 between the movable contact 41 and the joint portion 42. The elastic portion 43 extends from the joint portion 42 to the side of the movable contact 41. As a result, the joint portion 42 is provided on the side opposite to the movable contact 41 with the elastic portion 43 interposed therebetween.
　接合部４２において第２端子片３の接合部３１と固着されることにより可動片４が固定され、弾性部４３が弾性変形することにより、その先端に形成されている可動接点４１が固定接点２１の側に押圧されて接触し、第１端子片２と可動片４とが通電可能となる。可動片４と第２端子片３とは、接合部３１及び接合部４２において電気的に接続されているので、第１端子片２と第２端子片３とが通電可能となる。 The movable piece 4 is fixed by being fixed to the joint portion 31 of the second terminal piece 3 at the joint portion 42, and the movable contact 41 formed at the tip thereof is fixed contact 21 by elastically deforming the elastic portion 43. The first terminal piece 2 and the movable piece 4 can be energized by being pressed against the side of the surface. Since the movable piece 4 and the second terminal piece 3 are electrically connected at the joint portion 31 and the joint portion 42, the first terminal piece 2 and the second terminal piece 3 can be energized.
　可動片４は、弾性部４３において、プレス加工により湾曲又は屈曲されている。湾曲又は屈曲の度合いは、熱応動素子５を収納できる限り特に限定はなく、作動温度及び復帰温度における弾性力、接点の押圧力などを考慮して適宜設定すればよい。また、弾性部４３のＢ面には、熱応動素子５に対向して一対の突起（接触部）４４ａ，４４ｂが形成されている。突起４４ａ，４４ｂと熱応動素子５とは接触して、突起４４ａ，４４ｂを介して熱応動素子５の変形が弾性部４３に伝達される（図１及び図３参照）。 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. Further, 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 and 3).
　熱応動素子５は、可動片４の状態を可動接点４１が固定接点２１に接触する導通状態から可動接点４１が固定接点２１から離隔する遮断状態に移行させる。熱応動素子５は、円弧状に湾曲した初期形状をなし、熱膨張率の異なる薄板材を積層することにより形成される。過熱により作動温度に達すると、熱応動素子５の湾曲形状は、スナップモーションを伴って逆反りし、冷却により復帰温度を下回ると復元する。熱応動素子５の初期形状は、プレス加工により形成することができる。所期の温度で熱応動素子５の逆反り動作により可動片４の弾性部４３が押し上げられ、かつ弾性部４３の弾性力により元に戻る限り、熱応動素子５の材質及び形状は特に限定されるものでないが、生産性及び逆反り動作の効率性の観点から矩形状が望ましく、小型でありながら弾性部４３を効率的に押し上げるために正方形に近い長方形であるのが望ましい。なお、熱応動素子５の材料としては、例えば、高膨脹側に銅－ニッケル－マンガン合金又はニッケル－クロム－鉄合金、低膨脹側に鉄－ニッケル合金をはじめとする、洋白、黄銅、ステンレス鋼など各種の合金からなる熱膨張率の異なる２種類の材料を積層したものが、所要条件に応じて組み合わせて使用される。 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 has an initial shape curved in an arc shape, and is formed by laminating thin plate materials having different coefficients of thermal expansion. When the operating temperature is reached due to overheating, the curved shape of the heat-responsive element 5 reversely warps with a snap motion, and is restored when the temperature drops below the 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 operation of the heat-responsive element 5 at the desired temperature and is restored by the elastic force of the elastic portion 43. However, from the viewpoint of productivity and efficiency of reverse warpage operation, a rectangular shape is desirable, and a rectangular shape close to a square is desirable in order to efficiently push up the elastic portion 43 while being small. As the material of the thermal reaction element 5, for example, nickel silver-brass, stainless steel such as copper-nickel-manganese alloy or nickel-chromium-iron alloy on the high expansion side and iron-nickel alloy on the low expansion side. Two types of materials having different coefficients of thermal expansion, which are made of various alloys such as steel, are laminated and used in combination according to required conditions.
　本出願においては、特に断りのない限り、ブレーカー１の厚さ方向で、可動片４を基準として熱応動素子５の方を向く方向（すなわち図１において下方向）を第１方向Ｄ１、第１方向Ｄ１とは逆の方向を第２方向Ｄ２とする。 In the present application, unless otherwise specified, the first direction D1 and the first direction in the thickness direction of the breaker 1 toward the heat-responsive element 5 with respect to the movable piece 4 (that is, the downward direction in FIG. 1). The direction opposite to the direction D1 is defined as the second direction D2.
　ＰＴＣサーミスター６は、可動片４が遮断状態にあるとき、第１端子片２と第２端子片３及び可動片４とを導通させる。ＰＴＣサーミスター６は、第１端子片２の支持部２３と熱応動素子５との間に配設されている。熱応動素子５の逆反り動作により第１端子片２と可動片４との通電が遮断されたとき、ＰＴＣサーミスター６に流れる電流が増大する。ＰＴＣサーミスター６は、温度上昇と共に抵抗値が増大して電流を制限する正特性サーミスターであれば、作動電流、作動電圧、作動温度、復帰温度などの必要に応じて種類を選択でき、その材料及び形状はこれらの諸特性を損なわない限り特に限定されるものではない。本実施形態では、チタニウム酸バリウム、チタニウム酸ストロンチウム又はチタニウム酸カルシウムを含むセラミック焼結体が用いられる。セラミック焼結体の他、ポリマーにカーボン等の導電性粒子を含有させたいわゆるポリマーＰＴＣを用いてもよい。 The PTC thermistor 6 conducts the first terminal piece 2, the second terminal piece 3, and the movable piece 4 when the movable piece 4 is in the cutoff state. The PTC thermistor 6 is arranged between the support portion 23 of the first terminal piece 2 and the heat-responsive element 5. When the energization between the first terminal piece 2 and the movable piece 4 is cut off by the reverse warp operation of the heat-responsive element 5, the current flowing through the PTC thermistor 6 increases. If the PTC thermistor 6 is a positive characteristic thermistor whose resistance value increases as the temperature rises and limits the current, 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. In this embodiment, a ceramic sintered body containing barium titanate, strontium titanate, or calcium titanate is used. In addition to the ceramic sintered body, a so-called polymer PTC in which conductive particles such as carbon are contained in the polymer may be used.
　ケース１０を構成するケース本体７及び蓋部材８は、難燃性のポリアミド、耐熱性に優れたポリフェニレンサルファイド（ＰＰＳ）、液晶ポリマー（ＬＣＰ）、ポリブチレンテレフタレート（ＰＢＴ）などの熱可塑性樹脂により成形されている。上述した樹脂と同等以上の特性が得られるのであれば、樹脂以外の絶縁材料を適用してもよい。 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. An insulating 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.
　ケース本体７には、可動片４、熱応動素子５及びＰＴＣサーミスター６などを収容するための内部空間である収容凹部７３が形成されている。収容凹部７３は、可動片４を収容するための開口７３ａ，７３ｂ、可動片４及び熱応動素子５を収容するための開口７３ｃ、並びに、ＰＴＣサーミスター６を収容するための開口７３ｄ等を有している。なお、ケース本体７に組み込まれた熱応動素子５の端縁は、収容凹部７３の内部に形成されている枠によって適宜当接され、熱応動素子５の逆反り時に案内される。 The case body 7 is formed with a storage recess 73, which is an internal space for housing the movable piece 4, the heat-responsive element 5, the PTC thermistor 6, and the like. The accommodating 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. doing. The edge of the heat-responsive element 5 incorporated in the case body 7 is appropriately abutted by a frame formed inside the accommodating recess 73, and is guided when the heat-responsive element 5 is warped in the reverse direction.
　蓋部材８には、カバー片９がインサート成形によって埋め込まれている（図２参照）。カバー片９は、上述した銅等を主成分とする金属又はステンレス鋼等の金属をプレス加工することにより板状に形成される。カバー片９は、図２及び図３に示すように、可動片４のＡ面と適宜当接し、可動片４の動きを規制すると共に、蓋部材８のひいては筐体としてのケース１０の剛性・強度を高めつつブレーカー１の小型化に貢献する。 A cover piece 9 is embedded in the lid member 8 by insert molding (see FIG. 2). The cover piece 9 is formed into a plate shape by pressing a metal containing copper or the like as a main component or a metal such as stainless steel as described above. As shown in FIGS. 2 and 3, the cover piece 9 appropriately abuts on the A surface of the movable piece 4 to regulate the movement of the movable piece 4, and the rigidity of the lid member 8 and thus the case 10 as a housing. It contributes to the miniaturization of the breaker 1 while increasing the strength.
　図１に示されるように、固定接点２１、可動片４、熱応動素子５及びＰＴＣサーミスター６等を収容したケース本体７の開口７３ａ、７３ｂ、７３ｃ等を塞ぐように、蓋部材８が、ケース本体７に装着される。ケース本体７と蓋部材８とは、例えば超音波溶着によって接合される。このとき、ケース本体７と蓋部材８とは、それぞれの外縁部の全周にわたって連続的に接合され、ケース１０の気密性が向上する。これにより、収容凹部７３がもたらすケース１０の内部空間は密閉され、可動片４、熱応動素子５及びＰＴＣサーミスター６等の部品がケース１０の外部の雰囲気から遮断され、保護されうる。 As shown in FIG. 1, the lid member 8 closes the openings 73a, 73b, 73c, etc. of the case body 7 accommodating the fixed contact 21, the movable piece 4, the heat responding element 5, the PTC thermistor 6, and the like. It is attached to the case body 7. The case body 7 and the lid member 8 are joined by, for example, ultrasonic welding. At this time, the case body 7 and the lid member 8 are continuously joined over the entire circumference of each outer edge portion, and the airtightness of the case 10 is improved. As a result, the internal space of the case 10 provided by the accommodating recess 73 is sealed, and parts such as the movable piece 4, the heat-responsive element 5, and the PTC thermistor 6 can be shielded from the outside atmosphere of the case 10 and protected.
　図２は、通常の充電又は放電状態におけるブレーカー１の動作を示している。通常の充電又は放電状態においては、熱応動素子５は初期形状を維持（逆反り前）している。カバー片９には、可動片４の頂部４３ａと当接し、頂部４３ａを熱応動素子５の側に押圧する突出部９１が設けられている。突出部９１が頂部４３ａを押圧することにより、弾性部４３は、弾性変形し、その先端に形成されている可動接点４１が固定接点２１の側に押圧されて接触する。これにより、可動片４の弾性部４３などを通じてブレーカー１の第１端子片２と第２端子片３との間は導通している。可動片４の弾性部４３と熱応動素子５とが接触し、可動片４、熱応動素子５、ＰＴＣサーミスター６及び第１端子片２は、回路として導通していてもよい。 FIG. 2 shows the operation of the breaker 1 in a normal charging or discharging state. In a normal charging or discharging state, the heat-responsive element 5 maintains its initial shape (before reverse warpage). The cover piece 9 is provided with a protruding portion 91 that comes into contact with the top portion 43a of the movable piece 4 and presses the top portion 43a toward the heat-responsive element 5. When the protruding portion 91 presses the top portion 43a, the elastic portion 43 is elastically deformed, and the movable contact 41 formed at the tip thereof is pressed toward the fixed contact 21 and comes into contact with the elastic portion 43. As a result, the first terminal piece 2 and the second terminal piece 3 of the breaker 1 are electrically connected to each other through the elastic portion 43 of the movable piece 4. The elastic portion 43 of the movable piece 4 and the heat-responsive element 5 may come into contact with each other, and the movable piece 4, the heat-responsive element 5, the PTC thermistor 6, and the first terminal piece 2 may be electrically connected as a circuit.
　図３は、過充電状態又は異常時などにおけるブレーカー１の動作を示している。過充電又は異常により高温状態となると、作動温度に達した熱応動素子５は逆反りし、可動片４の弾性部４３が押し上げられて固定接点２１と可動接点４１とが離隔する。ブレーカー１の内部で熱応動素子５が変形し、可動片４を押し上げるときの熱応動素子５の作動温度は、例えば、７０℃～９０℃である。このとき、固定接点２１と可動接点４１の間を流れていた電流は遮断され、僅かな漏れ電流が熱応動素子５及びＰＴＣサーミスター６を通して流れることとなる。ＰＴＣサーミスター６は、このような漏れ電流の流れる限り発熱を続け、熱応動素子５を逆反り状態に維持させつつ抵抗値を激増させるので、電流は固定接点２１と可動接点４１の間の経路を流れず、上述の僅かな漏れ電流のみが存在する（自己保持回路を構成する）。この漏れ電流は安全装置の他の機能に充てることができる。なお、本実施形態では、作動温度に達した熱応動素子５が逆反り変形する状況においても頂部４３ａと突出部９１との当接が維持される。これにより、頂部４３ａと突出部９１との当接箇所が支点となって可動片４が押し上げられ、固定接点２１と可動接点４１との距離が容易に維持される。また、可動片４が突出部９１によって支持されて、突出部９１が熱応動素子５の押し上げ力の一部を負担するので、可動片４の接合部４２にかかる力が抑制され、接合部３１からの接合部４２の剥離が抑制される。 FIG. 3 shows the operation of the breaker 1 in an overcharged state or an abnormal state. When the temperature becomes high due to overcharging or abnormality, the heat-responsive element 5 that has reached the operating temperature reversely warps, and the elastic portion 43 of the movable piece 4 is pushed up to separate the fixed contact 21 and the movable contact 41. The operating temperature of the heat-responsive element 5 when the heat-responsive element 5 is deformed inside the breaker 1 and pushes up the movable piece 4 is, for example, 70 ° C. to 90 ° C. At this time, the current flowing between the fixed contact 21 and the movable contact 41 is cut off, and a small leakage current flows through the heat-responsive element 5 and the PTC thermistor 6. 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. There is only a small amount of leakage current as described above (which constitutes a self-holding circuit). This leakage current can be used for other functions of the safety device. In the present embodiment, the contact between the top portion 43a and the protruding portion 91 is maintained even in a situation where the heat-responsive element 5 that has reached the operating temperature is reversely warped and deformed. As a result, the movable piece 4 is pushed up with the contact point between the top portion 43a and the protruding portion 91 as a fulcrum, and the distance between the fixed contact 21 and the movable contact 41 is easily maintained. Further, since the movable piece 4 is supported by the protruding portion 91 and the protruding portion 91 bears a part of the pushing force of the heat-responsive element 5, the force applied to the joint portion 42 of the movable piece 4 is suppressed, and the joint portion 31 is suppressed. The peeling of the joint portion 42 from the joint portion 42 is suppressed.
　図４は、回路基板１００に実装されたブレーカー１を示している。回路基板１００は、基材１０１の表面にランド１０２、１０３が形成されることにより、ブレーカー１の外部回路の一部を構成する。 FIG. 4 shows the breaker 1 mounted on the circuit board 100. The circuit board 100 forms a part of the external circuit of the breaker 1 by forming the lands 102 and 103 on the surface of the base material 101.
　ランド１０２、１０３は、ブレーカー１等の部品が実装される部品実装面１０４に形成されている。部品実装面１０４には、ブレーカー１以外の部品（図示せず）が適宜実装される。部品実装面１０４は、ブレーカー１の第１接続面２２ａが接続される第３接続面１０４ａに相当する。本実施形態の回路基板１００は、部品実装面１０４が２次電池２００に対向するように配されている。従って、第３接続面１０４ａは、２次電池２００に対向するように配されている。 The lands 102 and 103 are formed on the component mounting surface 104 on which components such as the breaker 1 are mounted. Parts (not shown) other than the breaker 1 are appropriately mounted on the component mounting surface 104. The component mounting surface 104 corresponds to the third connection surface 104a to which the first connection surface 22a of the breaker 1 is connected. The circuit board 100 of this embodiment is arranged so that the component mounting surface 104 faces the secondary battery 200. Therefore, the third connection surface 104a is arranged so as to face the secondary battery 200.
　回路基板１００は、２次電池２００の表面に対して隙間１０５を隔てて平行に設けられ、ブレーカー１は、隙間１０５に配されている。ブレーカー１、回路基板１００及び２次電池２００等によって、安全回路が構成される。 The circuit board 100 is provided parallel to the surface of the secondary battery 200 with a gap 105, and the breaker 1 is arranged in the gap 105. A safety circuit is composed of a breaker 1, a circuit board 100, a secondary battery 200, and the like.
　第１端子片２及び第２端子片３は、ブレーカー１のケース１０の長手方向の両端面から突出し、それぞれの先端部に第１端子２２及び第２端子３２が設けられている。第１端子２２の第１接続面２２ａがランド１０２と、第２端子３２の第２接続面３２ａがランド１０３と、それぞれはんだ１１０等を用いて接続されることにより、ブレーカー１は、回路基板１００に実装される。 The first terminal piece 2 and the second terminal piece 3 project from both end faces in the longitudinal direction of the case 10 of the breaker 1, and the first terminal 22 and the second terminal 32 are provided at the respective tip portions. The first connection surface 22a of the first terminal 22 is connected to the land 102, and the second connection surface 32a of the second terminal 32 is connected to the land 103 by using solder 110 or the like, so that the breaker 1 is connected to the circuit board 100. Is implemented in.
　ブレーカー１は、ケース１０外部の熱を検出するための熱検出部２８をさらに備えている。熱検出部２８は、検出した熱を熱応動素子５（図１等参照）に伝達する。本実施形態では、熱検出部２８によって検出された熱は、直上のＰＴＣサーミスター６を介して、熱応動素子５に伝達される。このような構成によれば、熱検出部２８から熱応動素子５に至る熱の伝達経路が短くなるので、熱応動素子５がブレーカー１の外部の熱に応じて感度よく変形し、ブレーカー１によって迅速に電流が遮断される。 The breaker 1 further includes a heat detection unit 28 for detecting heat outside the case 10. The heat detection unit 28 transfers the detected heat to the heat response element 5 (see FIG. 1 and the like). In the present embodiment, the heat detected by the heat detection unit 28 is transferred to the heat response element 5 via the PTC thermistor 6 directly above. According to such a configuration, the heat transfer path from the heat detection unit 28 to the heat response element 5 is shortened, so that the heat response element 5 is sensitively deformed in response to the heat outside the breaker 1, and the breaker 1 causes the breaker 1. The current is cut off quickly.
　本実施形態では、第１端子片２の支持部２３が熱検出部２８に相当する。熱検出部２８は、第１端子片２から分離して形成されていてもよい。例えば、第１端子片２が段曲げ部２５において分離され、熱検出部２８が第１端子片２とは別の部品にて構成されていてもよい。 In the present embodiment, the support portion 23 of the first terminal piece 2 corresponds to the heat detection portion 28. The heat detection unit 28 may be formed separately from the first terminal piece 2. For example, the first terminal piece 2 may be separated at the step bending portion 25, and the heat detection unit 28 may be composed of a component different from the first terminal piece 2.
　熱検出部２８は、被熱検出体である２次電池２００の熱を検出するための検出面２８ａを有している。２次電池２００は、ブレーカー１の第１方向Ｄ１の側に位置されている。これに伴い、検出面２８ａは、熱検出部２８の第１方向Ｄ１の側に設けられている。 The heat detection unit 28 has a detection surface 28a for detecting the heat of the secondary battery 200, which is a heat detection body. The secondary battery 200 is located on the side of the breaker 1 in the first direction D1. Along with this, the detection surface 28a is provided on the side of the heat detection unit 28 in the first direction D1.
　第１端子片２は、ケース１０の外側に第１曲がり部２６を有している。第１曲がり部２６は、ケース１０の内部に埋め込まれていてもよい。第１曲がり部２６は、固定接点２１と第１端子２２との間に形成されている。第１曲がり部２６は、第１接続面２２ａが固定接点２１よりも第２方向Ｄ２の側に位置するように形成されている。 The first terminal piece 2 has a first bent portion 26 on the outside of the case 10. The first bent portion 26 may be embedded inside the case 10. The first bent portion 26 is formed between the fixed contact 21 and the first terminal 22. The first bent portion 26 is formed so that the first connecting surface 22a is located closer to the second direction D2 than the fixed contact 21.
　また、第１端子片２は、第１曲がり部２６と第１端子２２との間に曲がり部２７を有している。曲がり部２７は、第１曲がり部２６とは逆向きに曲げられている。曲がり部２７によって、熱検出部２８の検出面２８ａと第１端子２２の第１接続面２２ａとが平行に配される。 Further, the first terminal piece 2 has a bent portion 27 between the first bent portion 26 and the first terminal 22. The bent portion 27 is bent in the opposite direction to the first bent portion 26. The bent portion 27 arranges the detection surface 28a of the heat detection unit 28 and the first connection surface 22a of the first terminal 22 in parallel.
　本ブレーカー１において、熱検出部２８は第１方向Ｄ１の側に検出面２８ａを有し、第１端子片２は、第１接続面２２ａが固定接点２１よりも第２方向Ｄ２の側に位置するように、第１曲がり部２６を有する。これにより、回路基板１００と２次電池２００との間にブレーカー１が配置されたとき、熱検出部２８の検出面２８ａが２次電池２００に対向し、かつその近傍に位置される。従って、２次電池２００の熱を感度よく検出できるようになる。 In the present breaker 1, the heat detection unit 28 has a detection surface 28a on the side of the first direction D1, and the first terminal piece 2 has the first connection surface 22a located closer to the second direction D2 than the fixed contact 21. As such, it has a first bend 26. As a result, when the breaker 1 is arranged between the circuit board 100 and the secondary battery 200, the detection surface 28a of the heat detection unit 28 faces the secondary battery 200 and is located in the vicinity thereof. Therefore, the heat of the secondary battery 200 can be detected with high sensitivity.
　第１接続面２２ａは、第１端子２２のＡ面に形成されている。すなわち、第１接続面２２ａ及び固定接点２１は、第１端子片２において第２方向Ｄ２の側の面であるＡ面に形成されている。これにより、回路基板１００のランド１０２に対向するように第１接続面２２ａを配しつつ、２次電池２００に対向するように検出面２８ａを配することが可能となる。従って、ブレーカー１を回路基板１００上にコンパクトに実装し、かつ、検出面２８ａにて２次電池２００の熱を感度よく検出できるようになる。 The first connection surface 22a is formed on the A surface of the first terminal 22. That is, the first connection surface 22a and the fixed contact 21 are formed on the A surface, which is the surface on the side of the second direction D2 in the first terminal piece 2. As a result, the first connection surface 22a can be arranged so as to face the land 102 of the circuit board 100, and the detection surface 28a can be arranged so as to face the secondary battery 200. Therefore, the breaker 1 can be compactly mounted on the circuit board 100, and the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a.
　第２方向Ｄ２を正の方向として、固定接点２１から第１接続面２２ａまでの距離Ｓ１は、固定接点２１から、ケース１０の端縁までの距離Ｓ２以上である、のが望ましい。このような構成により、回路基板１００に開口等を設けることなく、ブレーカー１を回路基板１００上にコンパクトに実装しつつ、検出面２８ａにて２次電池２００の熱を感度よく検出できるようになる。なお、上記特許文献１に開示されている形態のブレーカーでは、第２方向Ｄ２を正の方向とする距離Ｓ１は、負値となり、距離Ｓ２よりも小さくなる。 It is desirable that the distance S1 from the fixed contact 21 to the first connection surface 22a is equal to or greater than the distance S2 from the fixed contact 21 to the edge of the case 10 with the second direction D2 as the positive direction. With such a configuration, the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a while the breaker 1 is compactly mounted on the circuit board 100 without providing an opening or the like in the circuit board 100. .. In the breaker of the form disclosed in Patent Document 1, the distance S1 with the second direction D2 as the positive direction has a negative value and is smaller than the distance S2.
　本実施形態では、検出面２８ａは、ケース１０の内部に埋め込まれている。これにより、ケース１０の内部の気密性を容易に高めることが可能となる。また、検出面２８ａは、ケース１０の外部に露出していてもよい。例えば、ケース本体７のＢ面に検出面２８ａを露出させるための開口が設けられていてもよい。また、検出面２８ａがケース本体７のＢ面と同一平面上に形成されていてもよい。これらの形態では、検出面２８ａが２次電池２００の熱をより一層感度よく検出できるようになる。 In the present embodiment, the detection surface 28a is embedded inside the case 10. This makes it possible to easily improve the airtightness inside the case 10. Further, the detection surface 28a may be exposed to the outside of the case 10. For example, an opening for exposing the detection surface 28a may be provided on the B surface of the case body 7. Further, the detection surface 28a may be formed on the same plane as the B surface of the case body 7. In these forms, the detection surface 28a can detect the heat of the secondary battery 200 with even higher sensitivity.
　ケース本体７のＢ面又は検出面２８ａは、２次電池２００に接触するか僅かな隙間を隔てて配されるのが望ましい。また、図４、５に示されるように、検出面２８ａと２次電池２００との間にケース本体７を構成する樹脂の一部が介在する形態であっても、上記樹脂の厚さを薄く、かつ検出面２８ａと２次電池２００とを接近して配置することにより、検出面２８ａが２次電池２００の熱をより感度よく検出できるようになる。 It is desirable that the B surface or the detection surface 28a of the case body 7 is arranged in contact with the secondary battery 200 or with a slight gap. Further, as shown in FIGS. 4 and 5, even if a part of the resin constituting the case body 7 is interposed between the detection surface 28a and the secondary battery 200, the thickness of the resin is reduced. Moreover, by arranging the detection surface 28a and the secondary battery 200 close to each other, the detection surface 28a can detect the heat of the secondary battery 200 with higher sensitivity.
　第２端子片３は、ケース１０の外側に第２曲がり部３６を有している。第２曲がり部３６は、ケース１０の内部に埋め込まれていてもよい。第２曲がり部３６は、接合部３１と第２端子３２との間に形成されている。第２曲がり部３６は、第２接続面３２ａが固定接点２１及び接合部３１よりも第２方向Ｄ２の側に位置するように形成されている。 The second terminal piece 3 has a second bent portion 36 on the outside of the case 10. The second bent portion 36 may be embedded inside the case 10. The second bent portion 36 is formed between the joint portion 31 and the second terminal 32. The second bent portion 36 is formed so that the second connecting surface 32a is located closer to the fixed contact 21 and the joint portion 31 in the second direction D2.
　また、第２端子片３は、第２曲がり部３６と第２端子３２との間に曲がり部３７を有している。曲がり部３７は、第２曲がり部３６とは逆向きに曲げられている。曲がり部３７によって、熱検出部２８の検出面２８ａと第２端子３２の第２接続面３２ａとが平行に配される。 Further, the second terminal piece 3 has a bent portion 37 between the second bent portion 36 and the second terminal 32. The bent portion 37 is bent in the opposite direction to the second bent portion 36. The bent portion 37 arranges the detection surface 28a of the heat detection unit 28 and the second connection surface 32a of the second terminal 32 in parallel.
　第２接続面３２ａは、第２端子３２のＡ面に形成されている。これにより、回路基板１００のランド１０３に対向するように第２接続面３２ａを配しつつ、２次電池２００に対向するように検出面２８ａを配することが可能となる。従って、ブレーカー１を回路基板１００上にコンパクトに実装し、かつ、検出面２８ａにて２次電池２００の熱を感度よく検出できるようになる。 The second connection surface 32a is formed on the A surface of the second terminal 32. As a result, the second connection surface 32a can be arranged so as to face the land 103 of the circuit board 100, and the detection surface 28a can be arranged so as to face the secondary battery 200. Therefore, the breaker 1 can be compactly mounted on the circuit board 100, and the heat of the secondary battery 200 can be detected with high sensitivity on the detection surface 28a.
　本実施形態では、第１接続面２２ａと第２接続面３２ａとは、同一平面上に配されている。すなわち、ケース１０のＡ面からの第２接続面３２ａの高さは、ケース１０のＡ面からの第１接続面２２ａの高さに等しい。これにより、回路基板１００にブレーカー１が適正に実装されたとき、ケース１０が回路基板１００と平行に配される。そして、検出面２８ａが、２次電池２００と平行に配され、２次電池２００の熱をより一層感度よく検出できるようになる。 In the present embodiment, the first connection surface 22a and the second connection surface 32a are arranged on the same plane. That is, the height of the second connection surface 32a from the A surface of the case 10 is equal to the height of the first connection surface 22a from the A surface of the case 10. As a result, when the breaker 1 is properly mounted on the circuit board 100, the case 10 is arranged in parallel with the circuit board 100. Then, the detection surface 28a is arranged in parallel with the secondary battery 200, so that the heat of the secondary battery 200 can be detected even more sensitively.
　図５は、回路基板１００の変形例である回路基板１００Ａに実装されたブレーカー１を示している。回路基板１００Ａは、部品実装面１０４が２次電池２００に背向するように（すなわち、基材１０１のＡ面側に）配される点で、回路基板１００とは異なる。回路基板１００Ａでは、部品実装面１０４とは反対側に２次電池２００が配置される。従って、第３接続面１０４ａは、２次電池２００に背向するように配されている。 FIG. 5 shows a breaker 1 mounted on the circuit board 100A, which is a modification of the circuit board 100. The circuit board 100A differs from the circuit board 100 in that the component mounting surface 104 is arranged so as to face the secondary battery 200 (that is, on the A surface side of the base material 101). In the circuit board 100A, the secondary battery 200 is arranged on the side opposite to the component mounting surface 104. Therefore, the third connection surface 104a is arranged so as to face the secondary battery 200.
　回路基板１００Ａは、ランド１０２とランド１０３との間に、ブレーカー１のケース１０の少なくとも一部を収容するための貫通穴１０６を有している。貫通穴１０６は、基材１０１を厚さ方向に貫通する。本実施形態の貫通穴１０６は、ケース１０の全体と第１端子片２及び第２端子片３の一部とを収容する。ブレーカー１が回路基板１００Ａに実装されると、ブレーカー１が貫通穴１０６に収容されることにより、回路基板１００Ａを２次電池２００に接近させて配置することが可能となる。従って、ブレーカー１、回路基板１００Ａ及び２次電池２００をコンパクトに集約することが可能となる。 The circuit board 100A has a through hole 106 between the land 102 and the land 103 for accommodating at least a part of the case 10 of the breaker 1. The through hole 106 penetrates the base material 101 in the thickness direction. The through hole 106 of the present embodiment accommodates the entire case 10 and a part of the first terminal piece 2 and the second terminal piece 3. When the breaker 1 is mounted on the circuit board 100A, the breaker 1 is housed in the through hole 106, so that the circuit board 100A can be arranged close to the secondary battery 200. Therefore, the breaker 1, the circuit board 100A, and the secondary battery 200 can be compactly integrated.
　ブレーカー１が回路基板１００Ａに実装される形態では、第１接続面２２ａには、第１端子２２のＢ面が適用され、第２接続面３２ａには、第２端子３２のＢ面が適用される。この場合、第１接続面２２ａは、第１端子片２における第１方向Ｄ１の側の面に、第２接続面３２ａは、第２端子片３における第１方向Ｄ１の側の面にそれぞれ配される。 In the form in which the breaker 1 is mounted on the circuit board 100A, the B surface of the first terminal 22 is applied to the first connection surface 22a, and the B surface of the second terminal 32 is applied to the second connection surface 32a. To. In this case, the first connection surface 22a is arranged on the surface of the first terminal piece 2 on the side of the first direction D1, and the second connection surface 32a is arranged on the surface of the second terminal piece 3 on the side of the first direction D1. Will be done.
　ブレーカー１が回路基板１００Ａに実装される形態であっても、熱検出部２８は第１方向Ｄ１の側に検出面２８ａを有し、第１端子片２は、第１接続面２２ａが固定接点２１よりも第２方向Ｄ２の側に位置するように、第１曲がり部２６を有する。これにより、検出面２８ａが２次電池２００に対向し、かつその近傍に位置される。従って、２次電池２００の熱を感度よく検出できるようになる。 Even if the breaker 1 is mounted on the circuit board 100A, the heat detection unit 28 has a detection surface 28a on the side of the first direction D1, and the first terminal piece 2 has a first connection surface 22a as a fixed contact. The first bent portion 26 is provided so as to be located closer to the second direction D2 than the 21. As a result, the detection surface 28a faces the secondary battery 200 and is located in the vicinity thereof. Therefore, the heat of the secondary battery 200 can be detected with high sensitivity.
　第１端子片２は、少なくとも第１接続面２２ａが形成される領域において、Ａ面及びＢ面の両面（すなわち、第１方向Ｄ１及び第２方向Ｄ２の側の両面）に、銀又はスズを主成分とするメッキ層が形成されている、のが望ましい。上記メッキ層によって、はんだ１１０の濡れ性が高められ、ランド１０２とのはんだ付けが容易となる。そして、第１端子２２のＡ面及びＢ面の両面に上記メッキ層が形成されることにより、ブレーカー１が回路基板１００又は１００Ａのいずれに実装される場合であっても、はんだ１１０の濡れ性が高められ、ランド１０２とのはんだ付けが容易となる。 The first terminal piece 2 has silver or tin on both sides of the A and B surfaces (that is, both sides of the first direction D1 and the second direction D2) at least in the region where the first connection surface 22a is formed. It is desirable that a plating layer containing the main component is formed. The plating layer enhances the wettability of the solder 110 and facilitates soldering to the land 102. Then, by forming the plating layers on both the A surface and the B surface of the first terminal 22, the wettability of the solder 110 regardless of whether the breaker 1 is mounted on the circuit board 100 or 100A. Is enhanced, and soldering to the land 102 becomes easy.
　第２端子片３の第２接続面３２ａについても上記と同様である。 The same applies to the second connection surface 32a of the second terminal piece 3.
　以上、本発明のブレーカー等が詳細に説明されたが、本発明は上記の具体的な実施形態に限定されることなく種々の態様に変更して実施される。すなわち、本発明のブレーカー１は、少なくとも、外部回路と電気的に接続される第１接続面２２ａ及び固定接点２１を有する板状の第１端子片２と、可動接点４１を有し、可動接点４１を固定接点２１に押圧して接触させる可動片４と、温度変化に伴って変形することにより可動接点４１が固定接点２１から離隔するように可動片４を作動させる熱応動素子５と、固定接点２１、可動片４及び熱応動素子５を収容するためのケース１０とを備えたブレーカー１であって、ケース１０の外部の熱を検出し、熱応動素子５に伝達するための熱検出部２８をさらに備え、熱検出部２８は、可動片４を基準として熱応動素子５の方を向く第１方向Ｄ１の側に検出面２８ａを有し、第１端子片２は、第１接続面２２ａが固定接点２１よりも第１方向Ｄ１とは反対の第２方向Ｄ２の側に位置するように、第１曲がり部２６を有していればよい。 Although the breaker and the like of the present invention have been described in detail above, the present invention is not limited to the above-mentioned specific embodiment, but is modified to various embodiments. That is, the breaker 1 of the present invention has at least a plate-shaped first terminal piece 2 having a first connection surface 22a and a fixed contact 21 electrically connected to an external circuit, and a movable contact 41, and has a movable contact. Fixed with a movable piece 4 that presses 41 against the fixed contact 21 to bring it into contact, and a heat-responsive element 5 that operates the movable piece 4 so that the movable contact 41 is separated from the fixed contact 21 by being deformed with a temperature change. A breaker 1 including a contact 21, a movable piece 4, and a case 10 for accommodating a heat-responsive element 5. A heat detection unit for detecting heat outside the case 10 and transferring it to the heat-responsive element 5. 28 is further provided, the heat detection unit 28 has a detection surface 28a on the side of the first direction D1 facing the heat reaction element 5 with reference to the movable piece 4, and the first terminal piece 2 has a first connection surface. It suffices to have the first bent portion 26 so that the 22a is located on the side of the second direction D2 opposite to the first direction D1 with respect to the fixed contact 21.
　例えば、被熱検出体は、上述した２次電池２００に限られない。例えば、モーター等の発熱体であってもよい。 For example, the heat-received detector is not limited to the above-mentioned secondary battery 200. For example, it may be a heating element such as a motor.
　また、本実施形態のブレーカー１では、ＰＴＣサーミスター６による自己保持回路を有しているが、このような構成を省いた形態であっても適用可能である。また、可動片と熱応動素子とが一体化されている形態、例えば、バイメタル等の金属材料によって可動片が形成されている形態のブレーカーにも適用可能である。 Further, although the breaker 1 of the present embodiment has a self-holding circuit by the PTC thermistor 6, it can be applied even if such a configuration is omitted. It is also applicable to a breaker in which a movable piece and a heat-responsive element are integrated, for example, in a form in which the movable piece is formed of a metal material such as bimetal.
　また、本発明は、例えば、特開２０１３－１４９６３２号公報に示されるような、第２端子片と可動片とが一体に形成されている形態にも、適用されうる。 The present invention can also be applied to, for example, a form in which a second terminal piece and a movable piece are integrally formed, as shown in Japanese Patent Application Laid-Open No. 2013-149632.
１　　　　ブレーカー
２　　　　第１端子片
３　　　　第２端子片
４　　　　可動片
５　　　　熱応動素子
１０　　　ケース
２１　　　固定接点
２２　　　第１端子
２２ａ　　第１接続面
２６　　　第１曲がり部
２８　　　熱検出部
２８ａ　　検出面
３２　　　第２端子
３２ａ　　第２接続面
４１　　　可動接点
１００　　回路基板
１００Ａ　回路基板
１０４ａ　第３接続面
１０６　　貫通穴
２００　　２次電池（被熱検出体）
Ｄ１　　　第１方向
Ｄ２　　　第２方向
Ｓ１　　　距離
Ｓ２　　　距離 1 Breaker 2 1st terminal piece 3 2nd terminal piece 4 Movable piece 5 Thermal response element 10 Case 21 Fixed contact 22 1st terminal 22a 1st connection surface 26 1st bend 28 Heat detection unit 28a Detection surface 32 2nd terminal 32a 2nd connection surface 41 Movable contact 100 Circuit board 100A Circuit board 104a 3rd connection surface 106 Through hole 200 Secondary battery (heat detector)
D1 1st direction D2 2nd direction S1 distance S2 distance

Claims (10)

  1. 　外部回路と電気的に接続される第１接続面及び固定接点を有する板状の第１端子片と、
    　可動接点を有し、前記可動接点を前記固定接点に押圧して接触させる可動片と、
    　温度変化に伴って変形することにより前記可動接点が前記固定接点から離隔するように前記可動片を作動させる熱応動素子と、
    　前記固定接点、前記可動片及び前記熱応動素子を収容するためのケースとを備えたブレーカーであって、
    　前記ケース外部の熱を検出し、前記熱応動素子に伝達するための熱検出部をさらに備え、
    　前記熱検出部は、前記可動片を基準として前記熱応動素子の方を向く第１方向の側に検出面を有し、
    　前記第１端子片は、前記第１接続面が前記固定接点よりも前記第１方向とは反対の第２方向の側に位置するように、第１曲がり部を有する、
    　ブレーカー。     A plate-shaped first terminal piece having a first connection surface and fixed contacts that are electrically connected to an external circuit,
    A movable piece having a movable contact and pressing the movable contact against the fixed contact,
    A heat-responsive element that operates the movable piece so that the movable contact is separated from the fixed contact by being deformed with a temperature change.
    A breaker including the fixed contact, the movable piece, and a case for accommodating the heat-responsive element.
    Further provided with a heat detection unit for detecting heat outside the case and transferring it to the heat-responsive element.
    The heat detection unit has a detection surface on the side in the first direction facing the heat response element with reference to the movable piece.
    The first terminal piece has a first bent portion so that the first connecting surface is located on the side in the second direction opposite to the first direction with respect to the fixed contact.
    breaker.
  2. 　前記第１接続面は、前記第１端子片における前記第１方向の側の面に配されている、
    　請求項１記載のブレーカー。     The first connection surface is arranged on the surface of the first terminal piece on the side in the first direction.
    The breaker according to claim 1.
  3. 　前記第１接続面は、前記第１端子片における前記第２方向の側の面に配されている、
    　請求項１記載のブレーカー。     The first connection surface is arranged on the surface of the first terminal piece on the side in the second direction.
    The breaker according to claim 1.
  4. 　前記外部回路と電気的に接続される第２接続面を有し、前記可動片に電気的に接続されている板状の第２端子片をさらに備え、
    　前記第１接続面と前記第２接続面とは、同一平面上に配されている、請求項１ないし３のいずれかに記載のブレーカー。     A plate-shaped second terminal piece having a second connecting surface electrically connected to the external circuit and electrically connected to the movable piece is further provided.
    The breaker according to any one of claims 1 to 3, wherein the first connecting surface and the second connecting surface are arranged on the same plane.
  5. 　前記第２方向を正の方向として、前記固定接点から前記第１接続面までの距離は、前記固定接点から、前記ケースの端縁までの距離以上である、請求項１ないし４のいずれかに記載のブレーカー。 According to any one of claims 1 to 4, the distance from the fixed contact to the first connection surface is equal to or greater than the distance from the fixed contact to the edge of the case, with the second direction as the positive direction. Described breaker.
  6. 　前記第１端子片は、少なくとも前記第１接続面が形成される領域において、前記第１方向及び前記第２方向の側の両面に、銀又はスズを主成分とするメッキ層が形成されている、請求項１ないし５のいずれかに記載のブレーカー。 In the first terminal piece, at least in the region where the first connection surface is formed, plating layers containing silver or tin as a main component are formed on both sides of the first direction and the second direction side. , The breaker according to any one of claims 1 to 5.
  7. 　前記熱検出部は、前記第１端子片と一体に形成され、前記検出面は、前記ケース外部に露出している、請求項１ないし６のいずれかに記載のブレーカー。 The breaker according to any one of claims 1 to 6, wherein the heat detection unit is integrally formed with the first terminal piece, and the detection surface is exposed to the outside of the case.
  8. 　前記外部回路を構成し、請求項１ないし７のいずれかに記載のブレーカーが実装される回路基板と、前記熱検出部によって熱が検出される被熱検出体とを含む安全回路であって、
    　前記ブレーカーは、前記熱検出部が前記被熱検出体に対向するように、配されている、安全回路。     A safety circuit including a circuit board that constitutes the external circuit and mounts the breaker according to any one of claims 1 to 7, and a heat-received detector whose heat is detected by the heat detection unit.
    The breaker is a safety circuit in which the heat detection unit is arranged so as to face the heat detection body.
  9. 　前記回路基板は、前記第１接続面が接続される第３接続面を有し、前記第３接続面が前記被熱検出体と対向するように配されている、請求項８記載の安全回路。 The safety circuit according to claim 8, wherein the circuit board has a third connection surface to which the first connection surface is connected, and the third connection surface is arranged so as to face the heat-received detector. ..
  10. 　前記回路基板は、前記第１接続面が接続される第３接続面と、前記回路基板を厚さ方向に貫通し、前記ケースの少なくとも一部を収容する貫通穴とを有し、前記第３接続面が前記被熱検出体と背向するように配されている、請求項８記載の安全回路。  The circuit board has a third connection surface to which the first connection surface is connected, and a through hole that penetrates the circuit board in the thickness direction and accommodates at least a part of the case. The safety circuit according to claim 8, wherein the connecting surface is arranged so as to face the heat-received detector.
PCT/JP2020/027095 2019-08-08 2020-07-10 Breaker and safety circuit WO2021024700A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005174816A (en) * 2003-12-12 2005-06-30 Matsushita Electric Ind Co Ltd Thermosensitive operation element
JP2013037858A (en) * 2011-08-05 2013-02-21 Otsuka Techno Kk Battery pack with non-conduction type breaker
WO2016098441A1 (en) * 2014-12-17 2016-06-23 大塚テクノ株式会社 Method for manufacturing breaker and method for manufacturing battery pack including the breaker
JP2016225142A (en) * 2015-05-29 2016-12-28 株式会社小松ライト製作所 Connector and circuit board
JP2017016749A (en) * 2015-06-26 2017-01-19 ボーンズ株式会社 Breaker and safety circuit including the same
JP2017037757A (en) * 2015-08-07 2017-02-16 ボーンズ株式会社 Breaker and safety circuit and secondary battery circuit including the same
JP2019008920A (en) * 2017-06-21 2019-01-17 ボーンズ株式会社 Current cutoff device and secondary battery pack including the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005174816A (en) * 2003-12-12 2005-06-30 Matsushita Electric Ind Co Ltd Thermosensitive operation element
JP2013037858A (en) * 2011-08-05 2013-02-21 Otsuka Techno Kk Battery pack with non-conduction type breaker
WO2016098441A1 (en) * 2014-12-17 2016-06-23 大塚テクノ株式会社 Method for manufacturing breaker and method for manufacturing battery pack including the breaker
JP2016225142A (en) * 2015-05-29 2016-12-28 株式会社小松ライト製作所 Connector and circuit board
JP2017016749A (en) * 2015-06-26 2017-01-19 ボーンズ株式会社 Breaker and safety circuit including the same
JP2017037757A (en) * 2015-08-07 2017-02-16 ボーンズ株式会社 Breaker and safety circuit and secondary battery circuit including the same
JP2019008920A (en) * 2017-06-21 2019-01-17 ボーンズ株式会社 Current cutoff device and secondary battery pack including the same

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