JP2005108585A - Thermally-actuated switch - Google Patents

Thermally-actuated switch Download PDF

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JP2005108585A
JP2005108585A JP2003339379A JP2003339379A JP2005108585A JP 2005108585 A JP2005108585 A JP 2005108585A JP 2003339379 A JP2003339379 A JP 2003339379A JP 2003339379 A JP2003339379 A JP 2003339379A JP 2005108585 A JP2005108585 A JP 2005108585A
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fixed
temperature coefficient
positive temperature
fixed terminal
coefficient thermistor
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Inventor
Hideki Masuda
英樹 増田
Tadamitsu Azema
忠満 畦間
Makito Takigawa
眞喜人 瀧川
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Priority to JP2003339379A priority Critical patent/JP2005108585A/en
Priority to KR1020040058242A priority patent/KR100563779B1/en
Priority to CNA2004100833026A priority patent/CN1604259A/en
Publication of JP2005108585A publication Critical patent/JP2005108585A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-holding type thermally-actuated switch having excellent workability and miniaturizable. <P>SOLUTION: This thermally-actuated switch is provided with: first and second fixed terminals 2 and 3 installed on a base 1; a bimetal piece 4 having one end side connected to the first fixed terminal 2 with a moving contact 5 fixed to the other end side; a fixed contact 3 formed on the second fixed terminal 3 and contacting to and separating from the moving contact 5; a positive-characteristic thermistor 9 for keeping reversal of the bimetal piece 4 by being connected to the bimetal piece 4 to generate heat; and a lid body 6 superimposed on the base 1. The thermally-actuated switch is so structured that the positive-characteristic thermistor 9 is mounted on the lid body 6 side; a conductive connection member 7 is installed on the lid body 6; in superimposing the lid body 6 on the base 1, the connection member 7 is connected to the second fixed terminal 3; and the thermistor 9 is connected in parallel between the first and second fixed terminals 2 and 3 through the connection member 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、熱応動スイッチに係り、特に過電流、過熱に対する自己保持型の熱応動スイッチの構造に関する。   The present invention relates to a heat responsive switch, and more particularly to a structure of a self-holding type heat responsive switch against overcurrent and overheat.

従来の自己保持型の熱応動スイッチの構造としては、可動接点板と固定接点板との間に通電により発熱する電子素子である正特性サーミスタ（ＰＴＣ素子）を保持する構造のものが知られている（例えば、特許文献１参照）。   As a structure of a conventional self-holding type thermally responsive switch, a structure in which a positive temperature coefficient thermistor (PTC element) that is an electronic element that generates heat by energization is held between a movable contact plate and a fixed contact plate is known. (For example, refer to Patent Document 1).

以下、従来の自己保持型の熱応動スイッチの構造を図に基づいて説明する。
図７は従来の自己保持型の熱応動スイッチを示す縦断面図、図８は従来の自己保持型の熱応動スイッチの要部の構成を示す分解斜視図である。 Hereinafter, the structure of a conventional self-holding type thermally responsive switch will be described with reference to the drawings.
FIG. 7 is a longitudinal sectional view showing a conventional self-holding type thermal responsive switch, and FIG. 8 is an exploded perspective view showing a configuration of a main part of the conventional self-holding type thermal responsive switch.

この熱応動スイッチは、たとえばナイロンからなる扁平な箱型ケース１１０を有し、ケース１１０の内側に装置要部（過電流または過熱に対する保護機構）を収容し、ケース１１０の開口より、たとえば真鍮等の導電板からなる一対の外部接続端子１１２，１１４を突出させてなる。ケース１１０の開口は、たとえばエポキシ等の樹脂体１１６で密閉または封止されている。
ケース１１０内において、外部接続端子１１２よりケース１１０の内壁面に沿ってケース内奥ないし底まで延在する導電板１１８は固定電極を形成しており、この固定電極１１８の先端部にはたとえば銀合金からなる固定接点１２０が取付されている。 This heat responsive switch has a flat box-type case 110 made of, for example, nylon, accommodates the main part of the device (protection mechanism against overcurrent or overheat) inside the case 110, and, for example, brass or the like from the opening of the case 110 A pair of external connection terminals 112 and 114 made of a conductive plate are projected. The opening of the case 110 is sealed or sealed with a resin body 116 such as epoxy.
In the case 110, a conductive plate 118 extending from the external connection terminal 112 along the inner wall surface of the case 110 to the back or bottom of the case forms a fixed electrode. A fixed contact 120 made of an alloy is attached.

封止用樹脂体１１６の内側で固定電極１１８上には、たとえばインサート成形で固定電極１１８と一体に、たとえばナイロンからなる支持および断熱用の樹脂ブロック１２２が設けられている。この樹脂ブロック１２２の中間部には穴１２２ａが形成されており、この穴１２２ａにたとえば扁平な直方体状の正特性サーミスタ１２４が下半部を入れるようにして取付される。正特性サーミスタ１２４の下部電極端子面１２４ａは、たとえば銀エポキシ等の導電性接着材で固定電極１１８に接着される。   On the fixed electrode 118 inside the sealing resin body 116, a support and heat insulating resin block 122 made of nylon, for example, is provided integrally with the fixed electrode 118 by insert molding, for example. A hole 122a is formed in an intermediate portion of the resin block 122, and a flat rectangular parallelepiped positive temperature coefficient thermistor 124 is attached to the hole 122a so that the lower half portion is inserted. The lower electrode terminal surface 124a of the positive temperature coefficient thermistor 124 is bonded to the fixed electrode 118 with a conductive adhesive such as silver epoxy.

可動電極１２６は、たとえば銅−黄銅合金からなり、図８に示すように、靴敷状のバイメタル部１２６ａと、このバイメタル１２６ａの基端に一体に接続された四角リングまたは枠状の係合部１２６ｂと、この枠状係合部１２６ｂの一端から外方へ延在する鉤状の係合部１２６ｃとを有している。バイメタル部１２６ａの先端部には、たとえば銀合金からなる可動接点１２８が取付されている。   The movable electrode 126 is made of, for example, a copper-brass alloy, and as shown in FIG. 8, a shoe-like bimetal portion 126a and a square ring or frame-like engagement portion integrally connected to the base end of the bimetal 126a. 126b and a hook-like engagement portion 126c extending outward from one end of the frame-like engagement portion 126b. A movable contact 128 made of, for example, a silver alloy is attached to the tip of the bimetal portion 126a.

樹脂ブロック１２２の中間角状***部１２２ｃが枠状押さえ部１３０の凹所１３０ａに熱でかしめられることにより、可動電極１２６がバイメタル部１２６ａの基端部１２６ｄにて正特性サーミスタ１２４の上部電極端子面１２４ｂに圧着される。この圧着部（１２６ｄ，１２４ｂ）で、正特性サーミスタ１２４と可動電極１２６との間に電気的接続が形成されると同時に、可動電極１２６のバイメタル部１２６ａの変位の支点が形成される。   The intermediate angular protrusion 122c of the resin block 122 is caulked by heat into the recess 130a of the frame-shaped pressing part 130, so that the movable electrode 126 is the upper electrode terminal of the positive temperature coefficient thermistor 124 at the base end 126d of the bimetal part 126a. Crimped to the surface 124b. At the crimping portions (126 d, 124 b), an electrical connection is formed between the positive temperature coefficient thermistor 124 and the movable electrode 126, and at the same time, a fulcrum for displacement of the bimetal portion 126 a of the movable electrode 126 is formed.

動作を説明すると、可動電極１２６のバイメタル部１２６ａは、原状態では、図７に示すように、先端部を下方に垂らした姿勢で、可動接点１２８を固定接点１２０に対して適度な接圧で押圧している。この原状態の下で、端子１１４と、端子１１２間に電流が流れると、バイメタル部１２６ａは、主として自己の抵抗発熱で加熱されるとともに固定電極１１８等の周囲の導電体の抵抗発熱によっても加熱される。接点閉状態では、両接点１２０，１２８を介して電流がほぼ短絡状態で両電極１１８，１２６間を流れるため、正特性サーミスタ１２４側には実質的な電流が流れず、正特性サーミスタ１２４はほとんど発熱しない。   To explain the operation, the bimetal portion 126a of the movable electrode 126 is in the original state with the tip portion hanging downward as shown in FIG. Pressing. When a current flows between the terminal 114 and the terminal 112 under this original state, the bimetal portion 126a is heated mainly by its own resistance heat generation and also by resistance heat generation of the surrounding conductors such as the fixed electrode 118. Is done. In the contact closed state, the current flows between the electrodes 118 and 126 with both the contacts 120 and 128 in a substantially short-circuited state, so that no substantial current flows on the positive characteristic thermistor 124 side. Does not generate heat.

しかし、過電流または負荷の加熱によって動作温度に達すると、バイメタル部１２６ａは先端部が持ち上がるように変位する。この際、バイメタル部１２６ａは正特性サーミスタ１２４に圧着されている基端部１２６ｄを支点として変位する。このバイメタル部１２６ａの変位によって、可動接点１２８が固定接点１２０から分離し、接点開状態となり、電流が切られる。   However, when the operating temperature is reached due to overcurrent or heating of the load, the bimetal portion 126a is displaced so that the tip portion is lifted. At this time, the bimetal portion 126a is displaced using the base end portion 126d that is crimped to the positive temperature coefficient thermistor 124 as a fulcrum. Due to the displacement of the bimetal portion 126a, the movable contact 128 is separated from the fixed contact 120, the contact is opened, and the current is cut off.

このようにして接点開状態になると、両電極１１８，１２６間の電圧が正特性サーミスタ１２４に印加され、正特性サーミスタ１２４が動作つまり通電して発熱する。このような正特性サーミスタ１２４の発熱によって、バイメタル部１２６ａが変位位置または応動位置に保持され、両接点１２０，１２８は分離したままの状態を維持する。   When the contact is thus opened, the voltage between the electrodes 118 and 126 is applied to the positive characteristic thermistor 124, and the positive characteristic thermistor 124 operates, that is, energizes to generate heat. Due to the heat generated by the positive temperature coefficient thermistor 124, the bimetal portion 126a is held at the displacement position or the response position, and both the contacts 120 and 128 remain separated.

特開平７−２８２７０１号公報JP-A-7-282701

しかしながら、上述した従来の自己保持型の熱応動スイッチにおいては、可動接点板と固定接点板との間に正特性サーミスタ（ＰＴＣ素子）を挟み込んだ後に、これらを一体化した状態でケース内に組み込み、外部接続端子を突出させたケースの開口を樹脂封止するため、取り扱いや、組み立て作業が煩雑であり、小型化ができないという問題があった。   However, in the above-described conventional self-holding type thermal responsive switch, a positive temperature coefficient thermistor (PTC element) is sandwiched between the movable contact plate and the fixed contact plate, and these are integrated into the case in an integrated state. Since the opening of the case from which the external connection terminal protrudes is resin-sealed, there is a problem that handling and assembly work are complicated, and the size cannot be reduced.

したがって、本発明では上述した問題点を解決し、組立性が良く、小型化が可能な自己保持型の熱応動スイッチを提供することを目的とする。   Accordingly, an object of the present invention is to solve the above-described problems, and to provide a self-holding type thermally responsive switch that is easy to assemble and can be miniaturized.

上記課題を解決するために本発明では第１の解決手段として、絶縁性の基台と、この基台に一端部が表出して配設された第１及び第２の固定端子と、前記第１の固定端子に一端側が接続され他端側に可動接点が固着された反転可能なバイメタル片と、前記第２の固定端子に設けられ前記可動接点と接離する固定接点と、前記バイメタル片に接続されて発熱することで前記バイメタル片の反転を保持する正特性サーミスタと、前記基台と重合される絶縁性の蓋体とを備え、前記正特性サーミスタは、前記蓋体側に取付けられると共に、前記蓋体には導電性の接続部材を配設し、前記蓋体と前記基台が重合する際に、前記接続部材を前記第２の固定端子と接続させ、前記接続部材を介して、前記正特性サーミスタを前記第１及び第２の固定端子間に並列に接続するようにした構成とした。   In order to solve the above-mentioned problems, the present invention provides, as a first solving means, an insulating base, first and second fixed terminals with one end exposed on the base, and the first A reversible bimetal piece having one end connected to one fixed terminal and a movable contact fixed to the other end; a fixed contact provided on the second fixed terminal and contacting and leaving the movable contact; and the bimetal piece A positive temperature coefficient thermistor that retains inversion of the bimetal piece by being connected to generate heat, and an insulating lid body that is superposed on the base, and the positive temperature coefficient thermistor is attached to the lid body side, The lid is provided with a conductive connection member, and when the lid and the base are overlapped, the connection member is connected to the second fixed terminal, and the connection member is used to connect the connection member. A positive temperature coefficient thermistor is connected between the first and second fixed terminals. It has a configuration which is adapted to connect in parallel.

また、第２の解決手段として、前記接続部材は、前記蓋体に一体的に埋設して形成され、前記接続部材の一端側に前記正特性サーミスタを接続し、前記接続部材の他端側を前記第２の固定端子に接続した構成とした。
また、第３の解決手段として、前記接続部材は、ニッケルリードで形成され、前記第２の固定端子と接続された他端側をさらに延出して溶接接続用の取付け部とした構成とした。
また、第４の解決手段として、前記蓋体には、ニッケルリードのダミー端子を一体的に埋設して形成し、このダミー端子の一端側を前記第１の固定端子に接続すると共に、この一端側をさらに延出して溶接接続用の取付け部とした構成とした。 Further, as a second solving means, the connection member is integrally formed in the lid body, the positive temperature coefficient thermistor is connected to one end side of the connection member, and the other end side of the connection member is connected. The configuration is such that it is connected to the second fixed terminal.
As a third solving means, the connection member is formed of nickel lead, and the other end connected to the second fixed terminal is further extended to be an attachment part for welding connection.
As a fourth solution, a nickel lead dummy terminal is integrally embedded in the lid, and one end of the dummy terminal is connected to the first fixed terminal, and the one end It was set as the structure which extended the side further and made it the attachment part for welding connection.

また、第５の解決手段として、前記蓋体には、前記正特性サーミスタの一端と接続するばね性を有する板ばね片を備え、この板ばね片で前記正特性サーミスタの他端を前記接続部材の一端側に圧接して保持し、前記板ばね片の一部を前記第１の固定端子あるいは前記バイメタル片に接続した構成とした。
また、第６の解決手段として、前記板ばね片の一部を、前記第１の固定端子あるいは前記バイメタル片に当接した状態で、前記基台と前記蓋体とを超音波溶着させて一体化した構成とした。
また、第７の解決手段として、前記接続部材及び前記正特性サーミスタを、前記第２の固定端子側に配置させて形成し、前記バイメタル片が反転した際に、前記可動接点が直接前記正特性サーミスタと接続するようにした構成とした。 Further, as a fifth solving means, the lid body is provided with a leaf spring piece having a spring property connected to one end of the positive temperature coefficient thermistor, and the other end of the positive temperature coefficient thermistor is connected to the connecting member by the leaf spring piece. And a part of the leaf spring piece is connected to the first fixed terminal or the bimetal piece.
As a sixth solution, the base and the lid body are ultrasonically welded and integrated with a part of the leaf spring piece in contact with the first fixed terminal or the bimetal piece. The configuration was changed.
As a seventh solving means, the connecting member and the positive temperature coefficient thermistor are formed on the second fixed terminal side, and when the bimetal piece is reversed, the movable contact is directly connected to the positive characteristics. It was configured to be connected to the thermistor.

以上説明したように、本発明の熱応動スイッチは、絶縁性の基台と、基台に一端部が表出して配設された第１及び第２の固定端子と、第１の固定端子に一端側が接続され他端側に可動接点が固着された反転可能なバイメタル片と、第２の固定端子に設けられ可動接点と接離する固定接点と、バイメタル片に接続されて発熱することでバイメタル片の反転を保持する正特性サーミスタと、基台と重合される絶縁性の蓋体とを備え、正特性サーミスタは、蓋体側に取付けられると共に、蓋体には導電性の接続部材を配設し、蓋体と基台が重合する際に、接続部材を第２の固定端子と接続させ、接続部材を介して、正特性サーミスタを第１及び第２の固定端子間に並列に接続するようにしたことから、基台と重合する蓋体側に、バイメタル片の反転を保持する正特性サーミスタと接続部材を取付けてブロック化したので、バイメタル片を保持する熱応動スイッチブロックとなる基台に蓋体を重ね合わせることで、簡単に組立てが行なえる。
また、正特性サーミスタを蓋体側に取付けるようにしたので、バイメタル片の反転を保持する自己保持型と、保持を必要としない非自己保持型とのバラエティーの対応が、蓋体の変更だけで良く、熱応動スイッチブロックとなる基台を共通化できるので、製造管理が容易となり安価にできる。 As described above, the thermally responsive switch according to the present invention includes an insulating base, first and second fixed terminals having one end exposed on the base, and the first fixed terminal. A reversible bimetal piece having one end connected and a movable contact fixed to the other end, a fixed contact provided on the second fixed terminal and contacting / separating from the movable contact, and being connected to the bimetal piece and generating heat to generate bimetal. It has a positive temperature coefficient thermistor that holds the reversal of the piece and an insulating lid that is superposed on the base, and the positive temperature coefficient thermistor is mounted on the lid side and a conductive connecting member is provided on the lid. When the lid and the base are overlapped, the connecting member is connected to the second fixed terminal, and the positive temperature coefficient thermistor is connected in parallel between the first and second fixed terminals via the connecting member. The bimetal piece is inverted on the side of the lid that overlaps with the base. Having blocked by attaching the positive temperature coefficient thermistor and the connecting member for holding, by superimposing the lid to the base to be thermo-switch block which holds the bimetallic piece, can be performed easily assembled.
Also, since the positive temperature coefficient thermistor is mounted on the lid side, the correspondence between the self-holding type that holds the inversion of the bimetal piece and the non-self-holding type that does not need to be held can be done simply by changing the lid. Since the base that becomes the thermally responsive switch block can be shared, manufacturing management becomes easy and inexpensive.

また、接続部材は、蓋体に一体的に埋設して形成され、接続部材の一端側に正特性サーミスタを接続し、接続部材の他端側を第２の固定端子に接続したことから、蓋体の成形時に接続部材を一体的に形成できるので、接続部材と正特性サーミスタ及び第２の固定端子との接続を容易に行なえる。
また、接続部材は、ニッケルリードで形成され、第２の固定端子と接続された他端側をさらに延出して溶接接続用の取付け部としたことから、熱応動スイッチブロックを電子機器などへ取付ける場合、このニッケルリードによって直接電子機器への直付け取り付け可能となるので、別途溶接接続用の導体を準備する必要がなく、取付けが容易となり安価にできる。
また、蓋体には、ニッケルリードのダミー端子を一体的に埋設して形成し、ダミー端子の一端側を第１の固定端子に接続すると共に、一端側をさらに延出して溶接接続用の取付け部としたことから、同様に、熱応動スイッチブロックを電子機器などへ取付ける場合、このダミー端子によって直接電子機器への直付け取り付け可能となるので、別途溶接接続用の導体を準備する必要がなく、取付けが容易となり安価にできる。 In addition, the connecting member is formed by being embedded in the lid body integrally, the positive characteristic thermistor is connected to one end side of the connecting member, and the other end side of the connecting member is connected to the second fixed terminal. Since the connection member can be integrally formed when the body is molded, the connection member, the positive temperature coefficient thermistor, and the second fixed terminal can be easily connected.
Further, the connecting member is formed of nickel lead, and the other end side connected to the second fixed terminal is further extended to be an attachment portion for welding connection, so that the thermally responsive switch block is attached to an electronic device or the like. In this case, since this nickel lead can be directly attached to an electronic device, it is not necessary to prepare a separate conductor for welding connection, and attachment can be facilitated and made inexpensive.
In addition, a nickel lead dummy terminal is integrally embedded in the lid, and one end side of the dummy terminal is connected to the first fixed terminal, and one end side is further extended to be attached for welding connection. Similarly, when mounting a thermally responsive switch block to an electronic device, etc., it is possible to directly mount it to the electronic device with this dummy terminal, so there is no need to prepare a separate conductor for welding connection. Easy installation and low cost.

また、蓋体には、正特性サーミスタの一端と接続するばね性を有する板ばね片を備え、板ばね片で正特性サーミスタの他端を接続部材の一端側に圧接して保持し、板ばね片の一部を第１の固定端子あるいはバイメタル片に接続したことから、板ばね片のばね性によって正特性サーミスタを弾性保持できるので、破損を防止して確実に保持できると共に、第１の固定端子あるいはバイメタル片との接続を確実なものとすることができる。
また、板ばね片の一部を、第１の固定端子あるいはバイメタル片に当接した状態で、基台と蓋体とを超音波溶着させて一体化したことから、超音波溶着時の微振動により金属表面の酸化膜が擦れてとれるので、安定した接触が得られる。
また、接続部材及び正特性サーミスタを、第２の固定端子側に配置させて形成し、バイメタル片が反転した際に、可動接点が直接正特性サーミスタと接続するようにしたことから、正特性サーミスタとバイメタル片あるいは第１の固定端子と接続する板ばね片が不要になるので、構成が簡易となり、小型化、安価対応が可能となる。 Further, the lid body is provided with a leaf spring piece having a spring property connected to one end of the positive temperature coefficient thermistor, and the leaf spring piece holds the other end of the positive temperature coefficient thermistor in pressure contact with one end side of the connection member. Since a part of the piece is connected to the first fixed terminal or the bimetal piece, the positive temperature coefficient thermistor can be elastically held by the spring property of the leaf spring piece, so that it can be securely held while preventing breakage, and the first fixed The connection with the terminal or the bimetal piece can be ensured.
Further, since the base and the lid are integrated by ultrasonic welding in a state where a part of the leaf spring piece is in contact with the first fixed terminal or the bimetal piece, the fine vibration at the time of ultrasonic welding is obtained. As a result, the oxide film on the metal surface can be rubbed off and stable contact can be obtained.
In addition, since the connecting member and the positive temperature coefficient thermistor are formed on the second fixed terminal side, and the bimetal piece is reversed, the movable contact is directly connected to the positive temperature coefficient thermistor. Since the leaf spring piece connected to the bimetal piece or the first fixed terminal is not necessary, the configuration is simplified, and the size and the cost can be reduced.

以下、本発明の熱応動スイッチの実施形態を図１乃至図６に示す。図１は本発明の熱応動スイッチの分解斜視図、図２は熱応動スイッチの平面図、図３は熱応動スイッチの断面図、図４は発熱体ブロックの底面図、図５は熱応動スイッチブロックの平面図、図６は発熱体ブロックの変形例を示す要部断面図である。   Embodiments of the thermally responsive switch of the present invention are shown in FIGS. FIG. 1 is an exploded perspective view of a thermally responsive switch of the present invention, FIG. 2 is a plan view of the thermally responsive switch, FIG. 3 is a sectional view of the thermally responsive switch, FIG. 4 is a bottom view of a heating element block, and FIG. FIG. 6 is a cross-sectional view of an essential part showing a modification of the heating element block.

図において、絶縁性の基台１は、合成樹脂等の絶縁材で上面が開口された箱状に形成されており、収納部１ａが設けられている。この基台１の収納部１ａの内底部には、後述する各固定端子が一体的に埋設されて、その一端部が表出して配設されており、この各固定端子の他端部は前記基台１の両側面側からそれぞれ外方へ導出されたものとなっている。
また、基台１の開口の四角部には、上方へ突出するボス１ｂが設けられており、このボス１ｂと後述する蓋体６の係合凹部６ｂとが係止されて位置決めされるものとなっている。 In the figure, an insulating base 1 is formed in a box shape having an upper surface opened by an insulating material such as a synthetic resin, and is provided with a storage portion 1a. In the inner bottom portion of the storage portion 1a of the base 1, each fixed terminal to be described later is integrally embedded, and one end portion thereof is exposed and disposed, and the other end portion of each fixed terminal is Each of them is led out from both side surfaces of the base 1.
Further, a boss 1b protruding upward is provided at a square portion of the opening of the base 1, and this boss 1b and an engagement recess 6b of a lid body 6 to be described later are locked and positioned. It has become.

第１の固定端子２は、黄銅等の導電性の金属材で平板状に形成されている。この第１の固定端子２の一端側には、プレスなどで偏肉させて突出部２ａが形成されており、この突出部２ａは後述するバイメタル片の一端部に固着される溶着部となっている。また、この第１の固定端子２の他端側には、前記基台１の側面部から外方へ導出されて他の電子機器などに接続される接続端子部２ｂが設けられている。また、この接続端子部２ｂが後述するダミー端子８と接続されるものとなっている。   The first fixed terminal 2 is formed in a flat plate shape with a conductive metal material such as brass. A protruding portion 2a is formed on one end side of the first fixed terminal 2 by uneven thickness with a press or the like, and the protruding portion 2a is a welding portion fixed to one end portion of a bimetal piece to be described later. Yes. Further, on the other end side of the first fixed terminal 2, there is provided a connection terminal portion 2 b that is led out from the side surface portion of the base 1 and connected to other electronic devices. The connection terminal portion 2b is connected to a dummy terminal 8 described later.

第２の固定端子３は、同じく黄銅等の導電性の金属材で平板状に形成されている。この第２の固定端子３の一端側には、後述する可動接点５と当接する固定接点３ａが設けられており、この第２の固定端子３の他端側には、前記基台１の側面部から外方へ導出されて他の電子機器などに接続される接続端子部３ｂが設けられている。また、この接続端子部３ｂが後述する接続部材７と接続されるものとなっている。   Similarly, the second fixed terminal 3 is formed in a flat plate shape from a conductive metal material such as brass. A fixed contact 3 a that comes into contact with a movable contact 5 described later is provided on one end side of the second fixed terminal 3, and a side surface of the base 1 is provided on the other end side of the second fixed terminal 3. A connection terminal portion 3b that is led out from the portion and connected to another electronic device or the like is provided. Moreover, this connection terminal part 3b is connected with the connection member 7 mentioned later.

バイメタル片４は、例えば、熱膨張率の高い材料からなる高膨張材と、熱膨張率の低い材料からなる低膨張材との、熱膨張率の異なる少なくとも２種類の金属材料を平板状に積層接合して形成されている。このバイメタル片４の一端側は、前記第１の固定端子２に設けられた前記突出部２ａにレーザー溶接等の方法で固着されたものとなっている。一方、このバイメタル片４の自由端となる他端側には、前記固定接点３ａと接離する、銀酸化錫等からなる可動接点５がレーザー溶接等の方法で固着されている。   The bimetal piece 4 is formed by, for example, laminating at least two kinds of metal materials having different thermal expansion coefficients in a flat plate shape, a high expansion material made of a material having a high thermal expansion coefficient and a low expansion material made of a material having a low thermal expansion coefficient. It is formed by bonding. One end of the bimetal piece 4 is fixed to the protruding portion 2a provided on the first fixed terminal 2 by a method such as laser welding. On the other hand, a movable contact 5 made of silver tin oxide or the like, which is in contact with or separated from the fixed contact 3a, is fixed to the other end which is a free end of the bimetal piece 4 by a method such as laser welding.

この場合、前記第１の固定端子２と前記バイメタル片４の一端側との結合箇所は、面全体でではなく、前記突出部２ａでのみの部分的結合となることから、前記バイメタル片４が反転動作する場合に動作特性を阻害しないようになっている。
また、前記バイメタル片４の中央部には、反転作用を助長するための膨出したドーム状の反転部４ａが形成されており、この反転部４ａを形成することで、前記バイメタル片４の、温度特性、すなわち、温度に応じた反転動作を確実に行えるようにしている。 In this case, since the coupling portion between the first fixed terminal 2 and the one end side of the bimetal piece 4 is not the entire surface but a partial coupling only at the protruding portion 2a, the bimetal piece 4 In the reverse operation, the operation characteristics are not hindered.
Further, a bulged dome-shaped reversing part 4a for promoting a reversing action is formed at the center of the bimetal piece 4, and by forming this reversing part 4a, The reversal operation according to the temperature characteristic, that is, the temperature, can be reliably performed.

絶縁性の蓋体６は、合成樹脂などの絶縁材から下面が開口した箱状に形成されており、収納部６ａを有している。この収納部６ａの内底部には、後述する接続部材７が一体的に埋設されて、その一端部が表出して配設されており、この接続部材７の他端部は前記蓋体６の一方の上面から側面に沿って略Ｚ字状に屈曲されて外方へ導出されたものとなっている。一方、蓋体６の他方側には、同じように上面から側面に沿って略Ｚ字状に屈曲されたダミー端子８が配設されている。   The insulating lid body 6 is formed in a box shape whose bottom surface is opened from an insulating material such as synthetic resin, and has a storage portion 6a. A connecting member 7 which will be described later is integrally embedded in the inner bottom portion of the storage portion 6a, and one end portion of the connecting member 7 is exposed and disposed. From one upper surface, it is bent in a substantially Z shape along the side surface and led outward. On the other hand, on the other side of the lid 6, a dummy terminal 8 bent in a substantially Z shape from the upper surface along the side surface is disposed.

また、蓋体６の開口の四角部には、窪み状の係合凹部６ｂが設けられており、この係合凹部６ｂと前記基台１のボス１ｂとが係止されて基台１と蓋体６が位置決めされて重合されるものとなっている。また、前記収納部６ａには、後述する正特性サーミスタ９を保持する丸穴状の保持部６ｃが設けられており、この保持部６ｃの周部近傍には後述する板ばね片１０を保持、固定する保持穴６ｄ、及び保持突起６ｅが設けられている。   In addition, a recessed engagement recess 6b is provided in the square portion of the opening of the lid body 6, and the engagement recess 6b and the boss 1b of the base 1 are locked to form the base 1 and the lid. The body 6 is positioned and polymerized. Further, the storage portion 6a is provided with a round hole-shaped holding portion 6c for holding a later-described positive temperature coefficient thermistor 9, and a leaf spring piece 10 to be described later is held in the vicinity of the peripheral portion of the holding portion 6c. A holding hole 6d for fixing and a holding projection 6e are provided.

接続部材７は、ニッケルなどの導電性の金属材で板状に形成されている。この接続部材７は、前記収納部６ａに配設された一端部が、前記保持部６ｃの内底面に表出して正特性サーミスタ９と接続する接続部７ａとなっている。また、他端側は、前記蓋体６の一方の上面から側面に沿って略Ｚ字状に２段に折り曲げられて外方へ導出されて、この導出部が前記第２の固定端子３の接続端子部３ｂに平行に配設されてニッケルリード７ｂを形成している。
また、このニッケルリード７ｂは、前記接続端子部３ｂに接続されると共に、更に延出されてその先端側が、電子機器などに直付けして取付ける際の溶接接続用の取付け部となっている。 The connection member 7 is formed in a plate shape with a conductive metal material such as nickel. One end of the connecting member 7 disposed in the storage portion 6 a is a connecting portion 7 a that is exposed on the inner bottom surface of the holding portion 6 c and is connected to the positive temperature coefficient thermistor 9. Further, the other end side is bent in two steps in a substantially Z shape along the side surface from one upper surface of the lid body 6 and is led out outward, and this lead-out portion is connected to the second fixed terminal 3. The nickel lead 7b is formed in parallel with the connection terminal portion 3b.
Further, the nickel lead 7b is connected to the connection terminal portion 3b, and is further extended so that a tip end side thereof is an attachment portion for welding connection when directly attaching to an electronic device or the like.

このように、接続部材７は、蓋体６に一体的に埋設して形成されており、接続部材７の一端側に正特性サーミスタ９を接続して、接続部材７の他端側を第２の固定端子３に接続するようにしてあるので、蓋体６の成形時に接続部材７を一体的に形成できるので、接続部材７と正特性サーミスタ９及び第２の固定端子３との接続を容易に行なえるものとなっている。   As described above, the connection member 7 is formed integrally with the lid body 6, the positive temperature coefficient thermistor 9 is connected to one end side of the connection member 7, and the other end side of the connection member 7 is connected to the second side. Since the connecting member 7 can be integrally formed when the lid body 6 is formed, the connecting member 7 can be easily connected to the positive temperature coefficient thermistor 9 and the second fixed terminal 3. It has become something that can be done.

また、接続部材７にはニッケルリード７ｂを有しており、このニッケルリード７ｂの、第２の固定端子３の接続端子部３ｂと接続された他端側をさらに延出して溶接接続用の取付け部としてあるので、熱応動スイッチを電子機器などへ取付ける場合、このニッケルリード７ｂによって、直接、電子機器への直付け取り付けが可能となるので、別途溶接接続用の導体を準備する必要がなくなり、取付けが容易となり、安価にできるものとなっている。   Further, the connecting member 7 has a nickel lead 7b. The other end side of the nickel lead 7b connected to the connecting terminal portion 3b of the second fixed terminal 3 is further extended to be attached for welding connection. Since the nickel lead 7b can be directly attached to an electronic device when the heat responsive switch is attached to an electronic device or the like, it is not necessary to prepare a separate conductor for welding connection. It is easy to install and inexpensive.

ダミー端子８は、同じくニッケルなどの導電性の金属板で板状に形成されており、前記蓋体６の接続部材７が導出された側とは反対側に、同じく上面から側面に沿って略Ｚ字状に２段に折り曲げられて配設されており、この折り曲げ部から前記第１の固定端子２の接続端子部２ｂに平行に配設されたニッケルリード８ａが形成されている。
このニッケルリード８ａは、前記接続端子部２ｂに接続されると共に、更に延出されてその先端側が、電子機器などに直付けして取付ける際の溶接接続用の取付け部となっている。 The dummy terminal 8 is also formed in the shape of a plate made of a conductive metal plate such as nickel. The dummy terminal 8 is also formed on the side opposite to the side from which the connecting member 7 of the lid 6 is led out, and also from the top to the side. A nickel lead 8a is formed by being bent in two stages in a Z-shape and arranged in parallel to the connection terminal portion 2b of the first fixed terminal 2 from the bent portion.
The nickel lead 8a is connected to the connection terminal portion 2b, and is further extended so that the tip side is an attachment portion for welding connection when directly attaching to an electronic device or the like.

同様に、第１の固定端子２側も、熱応動スイッチを電子機器などへ取付ける場合、このダミー端子８によって、直接、電子機器への直付け取り付け可能となるので、別途溶接接続用の導体を準備する必要がなく、取付けが容易となり安価にできるものとなる。   Similarly, when the thermally responsive switch is attached to an electronic device or the like on the first fixed terminal 2 side, the dummy terminal 8 can be directly attached to the electronic device. There is no need to prepare, and the mounting becomes easy and inexpensive.

正特性サーミスタ９は、通電により発熱する電子素子（ＰＴＣ素子）で、円板状をしており、バイメタル片４が温度変化により反転した場合に、発熱してバイメタル片４の反転状態を保持する自己保持動作を行なわせるようになっている。この正特性サーミスタ９は、前記蓋体６の保持部６ｃに保持されて、保持部６ｃの内底面に表出して配設された接続部材７の接続部７ａと接続されるものとなっている。   The positive temperature coefficient thermistor 9 is an electronic element (PTC element) that generates heat when energized, and has a disk shape. When the bimetal piece 4 is inverted due to a temperature change, the positive temperature coefficient thermistor 9 generates heat and holds the inverted state of the bimetal piece 4. Self-holding operation is performed. The positive temperature coefficient thermistor 9 is held by the holding portion 6c of the lid 6 and is connected to the connecting portion 7a of the connecting member 7 that is exposed and disposed on the inner bottom surface of the holding portion 6c. .

板ばね片１０は、ばね性を有する導電性の金属板で形成され、略平板状のばね部１０ａと、このばね部１０ａから垂直方向に立ち上がる起立部１０ｂを有し、ばね部１０ａには一対の保持溝１０ｃを有している。また、板ばね片１０は、前記起立部１０ｂが前記蓋体６の保持穴６ｄに係合され、一対の保持溝１０ｃが保持突起６ｅに係止されてかしめ止めされている。   The leaf spring piece 10 is formed of a conductive metal plate having a spring property, and has a substantially flat spring portion 10a and an upright portion 10b that rises vertically from the spring portion 10a. Holding groove 10c. Further, the plate spring piece 10 has the upright portion 10b engaged with the holding hole 6d of the lid body 6, and the pair of holding grooves 10c locked with the holding projections 6e to be caulked.

前記板ばね片１０は、前記蓋体６の保持部６ｃに保持された正特性サーミスタ９の下側に配設されて、この正特性サーミスタ９の一端と接続され、この板ばね片１０で正特性サーミスタ９の他端を前記接続部材７の接続部７ａに圧接して保持している。また、板ばね片１０の下端側の一部は、前記バイメタル片４に当接されて、前記第１の端子部材２と接続されている。   The leaf spring piece 10 is disposed below the positive temperature coefficient thermistor 9 held by the holding portion 6 c of the lid body 6 and is connected to one end of the positive temperature coefficient thermistor 9. The other end of the characteristic thermistor 9 is held in pressure contact with the connecting portion 7 a of the connecting member 7. A part of the lower end side of the leaf spring piece 10 is in contact with the bimetal piece 4 and connected to the first terminal member 2.

このように、板ばね片１０で正特性サーミスタ９の他端を接続部材７の接続部７ａに圧接して保持して、この板ばね片１０の一部をバイメタル片４に接続するようにしたので、板ばね片１０のばね性によって正特性サーミスタ９を弾性保持できるので、破損を防止して確実に保持できると共に、第１の固定端子２あるいはバイメタル片４との電気的な接続を確実なものとすることができる。   Thus, the other end of the positive temperature coefficient thermistor 9 is held in pressure contact with the connecting portion 7a of the connecting member 7 with the leaf spring piece 10 so that a part of the leaf spring piece 10 is connected to the bimetal piece 4. Therefore, since the positive temperature coefficient thermistor 9 can be elastically held by the spring property of the leaf spring piece 10, it can be securely held while preventing damage, and the electrical connection with the first fixed terminal 2 or the bimetal piece 4 is ensured. Can be.

上記構成の熱応動スイッチを組立てるには、第１及び第２の固定端子２、３が配設された基台１の収納部１ａに、固定接点３ａと可動接点５を対向させてバイメタル片４を挿入して、バイメタル片４の一端側を第１の固定端子２の突出部２ａに電気スポット溶接などの方法で固着する。この時、固定接点３ａと可動接点５は電気的に接続した状態となっている。この状態で、熱応動スイッチブロックが形成される。   In order to assemble the thermally responsive switch having the above-described configuration, the bimetallic piece 4 has the fixed contact 3a and the movable contact 5 opposed to the storage portion 1a of the base 1 on which the first and second fixed terminals 2 and 3 are disposed. The one end side of the bimetal piece 4 is fixed to the protruding portion 2a of the first fixed terminal 2 by a method such as electric spot welding. At this time, the fixed contact 3a and the movable contact 5 are in an electrically connected state. In this state, a thermally responsive switch block is formed.

次に、接続部材７、及びダミー端子８が配設された蓋体６の収納部６ａに設けられた保持部６ｃに正特性サーミスタ９を挿入する。そして、板ばね片１０の起立部１０ｂを蓋体６の保持穴６ｄに係合して、一対の保持溝１０ｃを保持突起６ｅに係止して熱かしめなどの方法でかしめ止めすることで、板ばね片１０で正特性サーミスタ９を接続部材７の接続部７ａに圧接して保持する。この時、正特性サーミスタ９が保持部６ｃの内底面に表出した接続部材７の接続部７ａと電気的に接続される。この状態で、発熱体ブロックが形成される。   Next, the positive temperature coefficient thermistor 9 is inserted into the holding portion 6c provided in the storage portion 6a of the lid 6 in which the connection member 7 and the dummy terminal 8 are disposed. Then, by engaging the upright portion 10b of the leaf spring piece 10 with the holding hole 6d of the lid body 6 and locking the pair of holding grooves 10c with the holding projections 6e, the caulking is stopped by a method such as heat caulking. The positive temperature coefficient thermistor 9 is held in pressure contact with the connecting portion 7 a of the connecting member 7 by the leaf spring piece 10. At this time, the positive temperature coefficient thermistor 9 is electrically connected to the connecting portion 7a of the connecting member 7 exposed on the inner bottom surface of the holding portion 6c. In this state, a heating element block is formed.

次に、熱応動スイッチブロックの上側から、発熱体ブロックを被せ、基台１の開口の四角部に設けられたボス１ｂと、蓋体６の開口の四角部に設けられた係合凹部６ｂとを係止して位置決めし重ね合わせる。この時、板ばね片１０の下端側の一部が、バイメタル片４と当接して、第１の端子部材２と正特性サーミスタ９が電気的に接続される。また、第１の固定端子２の接続端子部２ｂとダミー端子８のニッケルリード８ａ、及び第２の固定端子３の接続端子部３ｂと接続部材７のニッケルリード７ｂとが接続状態となる。   Next, a heating element block is covered from the upper side of the thermally responsive switch block, and a boss 1b provided at a rectangular portion of the opening of the base 1 and an engaging recess 6b provided at a rectangular portion of the opening of the lid body 6 , Position and overlap. At this time, a part of the lower end side of the leaf spring piece 10 comes into contact with the bimetal piece 4 so that the first terminal member 2 and the positive temperature coefficient thermistor 9 are electrically connected. In addition, the connection terminal portion 2b of the first fixed terminal 2 and the nickel lead 8a of the dummy terminal 8, and the connection terminal portion 3b of the second fixed terminal 3 and the nickel lead 7b of the connection member 7 are connected.

次に、基台１と蓋体６との重合面を超音波溶着などの方法で溶着して、熱応動スイッチブロックと発熱体ブロックとを一体化すると共に、第１の固定端子２の接続端子部２ｂとダミー端子８のニッケルリード８ａ、及び第２の固定端子３の接続端子部３ｂと接続部材７のニッケルリード７ｂとをレーザー溶接あるいは電気スポット溶接などの方法で固着させて組立てが完了する。   Next, the superposition surface of the base 1 and the lid body 6 is welded by a method such as ultrasonic welding to integrate the thermally responsive switch block and the heating element block, and the connection terminal of the first fixed terminal 2 The assembly is completed by fixing the part 2b and the nickel lead 8a of the dummy terminal 8, and the connection terminal part 3b of the second fixed terminal 3 and the nickel lead 7b of the connection member 7 by a method such as laser welding or electric spot welding. .

この状態で、接続部材７が第２の固定端子３と電気的に接続し、また、接続部材７、及び板ばね片１０とバイメタル片４を介して、正特性サーミスタ９が第１及び第２の固定端子２、３間に並列に接続されるものとなる。   In this state, the connecting member 7 is electrically connected to the second fixed terminal 3, and the positive temperature coefficient thermistor 9 is connected to the first and second via the connecting member 7, the leaf spring piece 10 and the bimetal piece 4. The fixed terminals 2 and 3 are connected in parallel.

尚、この時、板ばね片１０の一部を、バイメタル片４に当接した状態で、基台１と蓋体６とを超音波溶着させて一体化するようにしたので、超音波溶着時の微振動により金属表面の酸化膜が擦れてとれることから、金属板の圧接状態の接触構造においても安定した接触が得られるものとなっている。   At this time, since the base 1 and the lid 6 are integrated by ultrasonic welding while a part of the leaf spring piece 10 is in contact with the bimetal piece 4, the ultrasonic welding is performed. Since the oxide film on the metal surface is rubbed off by the slight vibration of the metal plate, stable contact can be obtained even in the contact structure of the metal plate in the pressure contact state.

次に、上記構成の熱応動スイッチの動作について説明する。
常温及び通常の使用温度においては、お互いに対向されて配置されている可動接点５と固定接点３ａは、お互いに接触して接点がオン状態となっている。この時、第１及び第２の固定端子２、３間には、バイメタル片４と、正特性サーミスタ９が並列に接続されているが、正特性サーミスタ９の有する内部抵抗値に対してバイメタル片４の抵抗値の方が極端に小さいため、正特性サーミスタ９には電流が流れず、第１及び第２の固定端子２、３間に印加された電流はバイメタル片ン４を流れるものとなる。
したがって、正特性サーミスタ９側には実質的な電流が流れず、正特性サーミスタ９はほとんど発熱しない。 Next, the operation of the thermally responsive switch having the above configuration will be described.
At normal temperature and normal use temperature, the movable contact 5 and the fixed contact 3a, which are arranged to face each other, are in contact with each other and the contacts are in an on state. At this time, the bimetal piece 4 and the positive temperature coefficient thermistor 9 are connected in parallel between the first and second fixed terminals 2 and 3. Since the resistance value of 4 is extremely smaller, no current flows through the positive temperature coefficient thermistor 9, and the current applied between the first and second fixed terminals 2 and 3 flows through the bimetal piece 4. .
Therefore, a substantial current does not flow on the positive characteristic thermistor 9 side, and the positive characteristic thermistor 9 hardly generates heat.

この状態から何らかの原因で温度が上昇すると、可動接点５が固着されているバイメタル片４に設けられた反転部４ａが、温度の上昇に応じて反転動作を行う。この時、バイメタル片４に固着されている可動接点５は、バイメタル片４と共に駆動され、固定接点３ａから離間することとなり、接点がオフ状態となる。この場合、反転したバイメタル片４の反転部４ａは、その膨出部が反転し、固定接点３ａの方向、即ち、基台１の内底面の方向へ突出する。   When the temperature rises for some reason from this state, the reversing portion 4a provided on the bimetal piece 4 to which the movable contact 5 is fixed performs a reversing operation in response to the temperature rise. At this time, the movable contact 5 fixed to the bimetal piece 4 is driven together with the bimetal piece 4 to be separated from the fixed contact 3a, and the contact is turned off. In this case, the bulging portion of the inverted portion 4 a of the inverted bimetal piece 4 is inverted and protrudes in the direction of the fixed contact 3 a, that is, in the direction of the inner bottom surface of the base 1.

このようにして接点がオフ状態になると、第１及び第２の固定端子２、３間の電圧が正特性サーミスタ９に印加され、正特性サーミスタ９が動作つまり通電して発熱するものとなる。このような正特性サーミスタ９の発熱によって、バイメタル片４は反転位置に保持され、可動接点５と固定接点３ａはオフしたままの状態を維持するものとなる。すなわち、自己保持状態となる。   When the contact is turned off in this manner, the voltage between the first and second fixed terminals 2 and 3 is applied to the positive characteristic thermistor 9, and the positive characteristic thermistor 9 operates, that is, energizes to generate heat. Due to the heat generated by the positive temperature coefficient thermistor 9, the bimetal piece 4 is held at the inverted position, and the movable contact 5 and the fixed contact 3 a remain off. That is, it becomes a self-holding state.

この自己保持された接点のオフ状態を解除するには、第１及び第２の固定端子２、３間の印加電圧を切ればよい。このようにして、この状態から温度が下降して元の常温に戻ると、バイメタル片４の反転部４ａは温度の下降に応じて反転復帰し、固定接点３ａの方向とは反対の方向へ突出することから、可動接点５が固定接点３にａ接触して接点がオン状態となり、初期の状態に復帰するものとなる。   In order to release the OFF state of the self-held contact, the applied voltage between the first and second fixed terminals 2 and 3 may be cut off. In this way, when the temperature drops from this state and returns to the original room temperature, the reversing portion 4a of the bimetal piece 4 is reversed and returned in accordance with the drop in temperature, and protrudes in a direction opposite to the direction of the fixed contact 3a. As a result, the movable contact 5 contacts the fixed contact 3, and the contact is turned on to return to the initial state.

上述した、本発明の熱応動スイッチの構造においては、正特性サーミスタ９を、蓋体６側に取付けると共に、この蓋体６に導電性の接続部材７を配設し、蓋体６と基台１を重ね合わせる際に、この接続部材７を第２の固定端子３と接続させて、接続部材７を介して、正特性サーミスタ９を第１及び第２の固定端子２、３間に並列に接続するようにしたことから、基台１と重ね合わせる蓋体６側に、バイメタル片４の反転を保持する正特性サーミスタ９と接続部材７を取付けてブロック化したので、バイメタル片４を保持する熱応動スイッチブロックとなる基台１に蓋体６を重ね合わせることで、簡単に組立てが行なえるものとなっている。   In the above-described structure of the thermally responsive switch of the present invention, the positive temperature coefficient thermistor 9 is attached to the lid body 6 side, and the conductive connection member 7 is disposed on the lid body 6. 1, the connecting member 7 is connected to the second fixed terminal 3, and the positive temperature coefficient thermistor 9 is connected in parallel between the first and second fixed terminals 2 and 3 via the connecting member 7. Since the positive characteristic thermistor 9 that holds the inversion of the bimetal piece 4 and the connecting member 7 are attached to the lid body 6 that is overlapped with the base 1 so as to be connected to form a block, the bimetal piece 4 is held. By superimposing the lid 6 on the base 1 serving as a thermally responsive switch block, the assembly can be easily performed.

また、正特性サーミスタ９を蓋体６側に取付けるようにしたので、バイメタル片４の反転を保持する自己保持型と、保持を必要としない非自己保持型とのバラエティーの対応が、蓋体６の変更だけで良く、熱応動スイッチブロックとなる基台１を共通化できるので、製造管理が容易となり安価にできるものとなっている。   In addition, since the positive temperature coefficient thermistor 9 is attached to the lid body 6 side, the correspondence between the variety of the self-holding type that holds the inversion of the bimetal piece 4 and the non-self-holding type that does not require holding is as follows. It is only necessary to change this, and since the base 1 serving as a thermally responsive switch block can be shared, manufacturing management becomes easy and inexpensive.

図６に示すのは、本発明の発熱体ブロックの変形例を示している。
上述した実施例の構成と相違する点は、接続部材７及び正特性サーミスタ９を、第２の固定端子３側に配置させて形成し、バイメタル片４が反転した際に、可動接点５が直接正特性サーミスタ９と接続するようにしたことにある。 FIG. 6 shows a modification of the heating element block of the present invention.
The difference from the configuration of the above-described embodiment is that the connecting member 7 and the positive temperature coefficient thermistor 9 are formed on the second fixed terminal 3 side, and when the bimetal piece 4 is reversed, the movable contact 5 is directly This is because it is connected to the positive temperature coefficient thermistor 9.

すなわち、蓋体６の収納部６ａの内低部には、接続部材７が一体的に埋設されて、その一端部が表出して配設されており、この接続部材７の他端部が蓋体６の一方から側面に沿って略Ｚ字状に屈曲されて外方へ導出されたものとなっている。また、収納部６ａには、丸穴状の保持部６ｃが設けられており、この保持部６ｃに、正特性サーミスタ９が導電性接着材等を用いて接続部材７の接続部７ａと固着されている。   That is, the connection member 7 is integrally embedded in the inner and lower portions of the storage portion 6a of the lid 6 and one end thereof is exposed and disposed. The other end of the connection member 7 is the lid. The body 6 is bent in a substantially Z shape along the side surface and led out to the outside. The storage portion 6a is provided with a round hole-shaped holding portion 6c, and the positive temperature coefficient thermistor 9 is fixed to the holding portion 6c with the connecting portion 7a of the connecting member 7 using a conductive adhesive or the like. ing.

そして、図６に２点鎖線で示すように、バイメタル片４が反転した際には、可動接点５が直接、正特性サーミスタ９の下端と接続して、バイメタル片４、及び正特性サーミスタ９、接続部材７を介して固定端子２と固定端子３間を電気的に接続するようになっている。   Then, as shown by a two-dot chain line in FIG. 6, when the bimetal piece 4 is reversed, the movable contact 5 is directly connected to the lower end of the positive characteristic thermistor 9, and the bimetal piece 4 and the positive characteristic thermistor 9, The fixed terminal 2 and the fixed terminal 3 are electrically connected via the connection member 7.

このような構成とすることにより、正特性サーミスタ９と、バイメタル片４あるいは第１の固定端子２と接続する板ばね片１０が不要になるので、更に、構成が簡易となり、小型化、安価対応が可能となっている。   By adopting such a configuration, the positive temperature coefficient thermistor 9 and the leaf spring piece 10 connected to the bimetal piece 4 or the first fixed terminal 2 become unnecessary, and the configuration is further simplified, miniaturized, and inexpensive. Is possible.

本発明の熱応動スイッチを示す分解斜視図である。It is a disassembled perspective view which shows the thermoresponsive switch of this invention. 本発明の熱応動スイッチを示す平面図である。It is a top view which shows the thermally responsive switch of this invention. 本発明の熱応動スイッチを示す断面図である。It is sectional drawing which shows the thermally responsive switch of this invention. 本発明の発熱体ブロックを示す底面図である。It is a bottom view which shows the heat generating body block of this invention. 本発明の熱応動スイッチブロックを示す平面図である。It is a top view which shows the thermally responsive switch block of this invention. 本発明の発熱体ブロックの変形例を示す要部断面図である。It is principal part sectional drawing which shows the modification of the heat generating body block of this invention. 従来の自己保持型の熱応動スイッチを示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional self-holding type thermoresponsive switch. 従来の自己保持型の熱応動スイッチの要部の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the principal part of the conventional self-holding type thermoresponsive switch.

符号の説明Explanation of symbols

１：基台
１ａ：収納部
１ｂ：ボス
２：第１の固定端子
２ａ：突出部
２ｂ：接続端子部
３：第２の固定端子
３ａ：固定接点
３ｂ：接続端子部
４：バイメタル片
４ａ：反転部
５：可動接点
６：蓋体
６ａ：収納部
６ｂ：係合凹部
６ｃ：保持部
６ｄ：保持穴
６ｅ：保持突起
７：接続部材
７ａ：接続部
７ｂ：ニッケルリード
８：ダミー端子
８ａ：ニッケルリード
９：正特性サーミスタ
１０：板ばね片
１０ａ：ばね部
１０ｂ：起立部
１０ｃ：保持溝
DESCRIPTION OF SYMBOLS 1: Base 1a: Storage part 1b: Boss 2: 1st fixed terminal 2a: Protrusion part 2b: Connection terminal part 3: 2nd fixed terminal 3a: Fixed contact 3b: Connection terminal part 4: Bimetal piece 4a: Inversion Part 5: Movable contact 6: Lid 6a: Storage part 6b: Engaging recess 6c: Holding part 6d: Holding hole 6e: Holding protrusion 7: Connection member 7a: Connection part 7b: Nickel lead 8: Dummy terminal 8a: Nickel lead 9: Positive temperature coefficient thermistor 10: Leaf spring piece 10a: Spring portion 10b: Standing portion 10c: Holding groove

Claims (7)

絶縁性の基台と、この基台に一端部が表出して配設された第１及び第２の固定端子と、前記第１の固定端子に一端側が接続され他端側に可動接点が固着された反転可能なバイメタル片と、前記第２の固定端子に設けられ前記可動接点と接離する固定接点と、前記バイメタル片に接続されて発熱することで前記バイメタル片の反転を保持する正特性サーミスタと、前記基台と重合される絶縁性の蓋体とを備え、前記正特性サーミスタは、前記蓋体側に取付けられると共に、前記蓋体には導電性の接続部材を配設し、前記蓋体と前記基台が重合する際に、前記接続部材を前記第２の固定端子と接続させ、前記接続部材を介して、前記正特性サーミスタを前記第１及び第２の固定端子間に並列に接続するようにしたことを特徴とする熱応動スイッチ。   Insulating base, first and second fixed terminals with one end exposed on the base, one end connected to the first fixed terminal, and movable contact fixed to the other end A reversible bimetal piece, a fixed contact that is provided on the second fixed terminal and is in contact with and away from the movable contact, and a positive characteristic that retains inversion of the bimetal piece by being connected to the bimetal piece and generating heat. A thermistor and an insulating lid that is superposed on the base; the positive temperature coefficient thermistor is attached to the lid, and a conductive connecting member is disposed on the lid; When the body and the base overlap, the connecting member is connected to the second fixed terminal, and the positive temperature coefficient thermistor is connected in parallel between the first and second fixed terminals via the connecting member. Thermally-responsive switch characterized in that it is connected 前記接続部材は、前記蓋体に一体的に埋設して形成され、前記接続部材の一端側に前記正特性サーミスタを接続し、前記接続部材の他端側を前記第２の固定端子に接続したことを特徴とする請求項１記載の熱応動スイッチ。   The connecting member is formed integrally with the lid, and the positive temperature coefficient thermistor is connected to one end of the connecting member, and the other end of the connecting member is connected to the second fixed terminal. The thermally responsive switch according to claim 1. 前記接続部材は、ニッケルリードで形成され、前記第２の固定端子と接続された他端側をさらに延出して溶接接続用の取付け部としたことを特徴とする請求項２記載の熱応動スイッチ。   3. The thermally responsive switch according to claim 2, wherein the connection member is formed of a nickel lead, and further extends the other end connected to the second fixed terminal to serve as an attachment portion for welding connection. . 前記蓋体には、ニッケルリードのダミー端子を一体的に埋設して形成し、このダミー端子の一端側を前記第１の固定端子に接続すると共に、この一端側をさらに延出して溶接接続用の取付け部としたことを特徴とする請求項２記載の熱応動スイッチ。   A nickel lead dummy terminal is integrally formed in the lid, and one end of the dummy terminal is connected to the first fixed terminal, and the one end is further extended for welding connection. The thermally responsive switch according to claim 2, wherein the thermally responsive switch is provided. 前記蓋体には、前記正特性サーミスタの一端と接続するばね性を有する板ばね片を備え、この板ばね片で前記正特性サーミスタの他端を前記接続部材の一端側に圧接して保持し、前記板ばね片の一部を前記第１の固定端子あるいは前記バイメタル片に接続したことを特徴とする請求項１記載の熱応動スイッチ。   The lid body is provided with a leaf spring piece having a spring property to be connected to one end of the positive temperature coefficient thermistor, and the other end of the positive temperature coefficient thermistor is held in pressure contact with the one end side of the connection member by the leaf spring piece. The thermally responsive switch according to claim 1, wherein a part of the leaf spring piece is connected to the first fixed terminal or the bimetal piece. 前記板ばね片の一部を、前記第１の固定端子あるいは前記バイメタル片に当接した状態で、前記基台と前記蓋体とを超音波溶着させて一体化したことを特徴とする請求項５記載の熱応動スイッチ。   The base and the lid are integrated by ultrasonic welding in a state where a part of the leaf spring piece is in contact with the first fixed terminal or the bimetal piece. 5. Thermally responsive switch according to 5. 前記接続部材及び前記正特性サーミスタを、前記第２の固定端子側に配置させて形成し、前記バイメタル片が反転した際に、前記可動接点が直接前記正特性サーミスタと接続するようにしたことを特徴とする請求項１記載の熱応動スイッチ。
The connecting member and the positive temperature coefficient thermistor are arranged on the second fixed terminal side, and when the bimetal piece is reversed, the movable contact is directly connected to the positive temperature coefficient thermistor. The thermally responsive switch according to claim 1.
JP2003339379A 2003-09-30 2003-09-30 Thermally-actuated switch Withdrawn JP2005108585A (en)

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KR1020040058242A KR100563779B1 (en) 2003-09-30 2004-07-26 Thermally-actuated switch
CNA2004100833026A CN1604259A (en) 2003-09-30 2004-09-29 Thermal response switch

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6995647B2 (en) * 2003-12-03 2006-02-07 Texas Instruments Incorporated Low current electric motor protector
US7102481B2 (en) * 2003-12-03 2006-09-05 Sensata Technologies, Inc. Low current electric motor protector
KR100685148B1 (en) 2005-10-25 2007-02-22 자화전자(주) Motor control relay having built-in overload protection apparatus
WO2015156136A1 (en) * 2014-04-09 2015-10-15 タイコエレクトロニクスジャパン合同会社 Protection device

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US6995647B2 (en) * 2003-12-03 2006-02-07 Texas Instruments Incorporated Low current electric motor protector
US7102481B2 (en) * 2003-12-03 2006-09-05 Sensata Technologies, Inc. Low current electric motor protector
KR100685148B1 (en) 2005-10-25 2007-02-22 자화전자(주) Motor control relay having built-in overload protection apparatus
WO2015156136A1 (en) * 2014-04-09 2015-10-15 タイコエレクトロニクスジャパン合同会社 Protection device

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