JP2015153683A - Waterproof and dust-proof switch, and method for manufacturing the same - Google Patents
Waterproof and dust-proof switch, and method for manufacturing the same Download PDFInfo
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- JP2015153683A JP2015153683A JP2014028317A JP2014028317A JP2015153683A JP 2015153683 A JP2015153683 A JP 2015153683A JP 2014028317 A JP2014028317 A JP 2014028317A JP 2014028317 A JP2014028317 A JP 2014028317A JP 2015153683 A JP2015153683 A JP 2015153683A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000004888 barrier function Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000007257 malfunction Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000007261 regionalization Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 208000010247 contact dermatitis Diseases 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006196 drop Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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- Push-Button Switches (AREA)
- Manufacture Of Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
Description
本発明は、例えば電動パーキングブレーキ（ＥＰＢ）スイッチ等として好適に利用することができ、特に使用時にケースの内部に水滴や塵などが侵入するのを確実に防ぐことができる防水防塵スイッチとその製造方法に関する。 The present invention can be suitably used, for example, as an electric parking brake (EPB) switch, and the like, and in particular, a waterproof and dustproof switch capable of reliably preventing water droplets and dust from entering the case during use, and its manufacture Regarding the method.
従来、このような用途のスイッチとして、例えば特許文献１に記載されたマイクロスイッチが知られている。このマイクロスイッチは、ベースとカバーからなるハウジングの内部に接点機構を収容し、ハウジングに取り付けた操作子を押圧して接点機構を操作するものである（特許文献１の図１７〜２４を参照）。 Conventionally, for example, a microswitch described in Patent Document 1 is known as a switch for such applications. This micro switch accommodates a contact mechanism inside a housing composed of a base and a cover, and operates the contact mechanism by pressing an operation element attached to the housing (see FIGS. 17 to 24 of Patent Document 1). .
このスイッチにおいて、ベースには共通端子、常閉固定接点端子、及び常開固定接点端子を差し込むためのスリットと、操作子を嵌合するための操作孔が設けられており、その側面には取付孔とリベット孔が設けられている。一方、カバーはベースに接合可能な側面形状を有しており、側面に嵌合用ボスとリベット孔が設けられている。そして、組立時にはベースのスリットに共通端子、常閉固定接点端子、及び常開固定接点端子をそれぞれ側方から差し込んで位置決めし、ベースの操作孔に操作子を嵌合する。その後、ベースの取付孔にカバーの嵌合用ボスを挿入し、重なった二つのリベット孔にリベットを挿入してカシメ加工することによりハウジング内に接点機構を収容している。 In this switch, the base is provided with a common terminal, a normally closed fixed contact terminal, a slit for inserting the normally open fixed contact terminal, and an operation hole for fitting the operation element. Holes and rivet holes are provided. On the other hand, the cover has a side surface shape that can be joined to the base, and a fitting boss and a rivet hole are provided on the side surface. At the time of assembly, the common terminal, normally closed fixed contact terminal, and normally open fixed contact terminal are respectively inserted into the slits of the base from the side and positioned, and the operation element is fitted into the operation hole of the base. Thereafter, the contact boss is accommodated in the housing by inserting the fitting boss of the cover into the mounting hole of the base and inserting the rivet into the two overlapping rivet holes and caulking.
ところが、前記のような従来のマイクロスイッチの構造によると、ベースとカバーからなるハウジングの密閉性が悪く、防水・防塵性能が低いという問題がある。すなわち、このスイッチのハウジングには、スリットと端子との間、操作孔と操作子との間、取付孔と嵌合用ボスとの間、そしてリベット孔とリベットとの間にそれぞれ隙間が存在する。また、ベースとカバーの側面同士を突き合わせて接合する構造であるため、両者の接合面にも隙間が存在する。したがって、これら数多くの隙間からハウジングの内部に水滴や塵などが侵入してしまうと、内部に収容された接点機構の錆付きや接触不良などが原因でスイッチの誤作動を引き起こす恐れがあり好ましくない。 However, according to the structure of the conventional microswitch as described above, there is a problem that the housing formed of the base and the cover is poorly sealed and the waterproof / dustproof performance is low. That is, in the switch housing, there are gaps between the slit and the terminal, between the operation hole and the operation element, between the mounting hole and the fitting boss, and between the rivet hole and the rivet. In addition, since the side surfaces of the base and the cover are brought into contact with each other, there is a gap on the joint surface between the two. Therefore, if water drops, dust, etc. enter the housing from these numerous gaps, it may cause malfunction of the switch due to rusting or poor contact of the contact mechanism housed inside. .
そこで、本発明はこのような問題を解決するためになされたものであり、その目的とするところは、ケースの密閉性を高めることにより、ケースの内部に水滴や塵などが侵入するのを確実に防ぐことができる、防水・防塵性能に優れたスイッチとその製造方法を提供することにある。 Therefore, the present invention has been made to solve such problems, and the object of the present invention is to ensure that water drops, dust, etc. enter the inside of the case by improving the sealing property of the case. It is an object of the present invention to provide a switch excellent in waterproof and dustproof performance and a method for manufacturing the same.
前記の目的を達成するため、本発明に係る防水防塵スイッチは、密閉されたケース内に接点パターンとスイッチ機構部を収容してなる防水防塵スイッチであって、前記ケースは、内部に前記接点パターンと前記スイッチ機構部が設置されたベースと、前記ベースの上に重ねて装着されるカバーと、から構成されており、前記ベースは、打ち抜き加工された導電性金属板が折り曲げられ、直立した共通端子、共通端子から所定の隙間を隔てて直立した常開固定端子、及び常開固定端子から所定の隙間を隔てて直立し、かつ、常開固定端子の上端の常開接点に対向する常閉接点が設けられた常閉固定端子からなる接点パターンと、前記接点パターンの前記常開固定端子と前記常閉固定端子との間の隙間を塞ぐ充填部と、がインサート成形されており、前記共通端子、前記常開固定端子、及び前記常閉固定端子の周囲を取り囲む防護壁が設けられていることを特徴とする。ここで、前記常開接点と前記常閉接点は共に前記打ち抜き加工された導電性金属板の側面に設けられており、前記スイッチ機構部を構成する可動接点が前記常開接点と前記常閉接点に対して線接触する構造であっても良い。 In order to achieve the above object, a waterproof and dustproof switch according to the present invention is a waterproof and dustproof switch that houses a contact pattern and a switch mechanism in a sealed case, and the case includes the contact pattern inside. And a base on which the switch mechanism is installed, and a cover that is mounted on the base, and the base is made up of an upright common material by bending a punched conductive metal plate. A normally open fixed terminal that is upright with a predetermined gap from the terminal, a common terminal, and a normally closed terminal that is upright with a predetermined gap from the normally open fixed terminal and that faces the normally open contact at the upper end of the normally open fixed terminal A contact pattern including a normally closed fixed terminal provided with a contact and a filling portion that closes a gap between the normally open fixed terminal and the normally closed fixed terminal of the contact pattern are insert-molded. , Wherein the common terminal, the normally open stationary terminal, and the protective wall surrounding the normally closed fixed terminal is provided. Here, the normally open contact and the normally closed contact are both provided on the side surface of the punched conductive metal plate, and the movable contact constituting the switch mechanism section is the normally open contact and the normally closed contact. It may be a structure in line contact.
また、前記の目的を達成するため、本発明に係る防水防塵スイッチの製造方法は、密閉されたケース内に接点パターンとスイッチ機構部を収容してなる防水防塵スイッチの製造方法であって、前記ケースを構成するベースの内部に接点パターンとスイッチ機構部を設置する工程と、前記ベースの上にカバーを重ねて装着してケースを密閉する工程と、を有し、前記ベースの内部に接点パターンを設置する工程は、導電性金属板を打ち抜き加工した後に折り曲げることにより、直立した共通端子と、共通端子から所定の隙間を隔てて直立した常開固定端子と、常開固定端子から所定の隙間を隔てて直立し、かつ、常開固定端子の上端の常開接点に対向する常閉接点が設けられた常閉固定端子と、からなる接点パターンを形成するパターン形成工程と、前記パターン形成工程により形成された接点パターンについて、前記常開固定端子と前記常閉固定端子との間の隙間を塞ぐ充填部をインサート成形する一次成形工程と、前記一次成形工程により成形された充填部付きの接点パターンについて、前記共通端子、前記常開固定端子、及び前記常閉固定端子の周囲を取り囲む防護壁が設けられたベースをインサート成形する二次成形工程と、を含むことを特徴とする。 In order to achieve the above object, a waterproof and dustproof switch manufacturing method according to the present invention is a waterproof and dustproof switch manufacturing method in which a contact pattern and a switch mechanism are housed in a sealed case. A step of installing a contact pattern and a switch mechanism inside the base constituting the case, and a step of sealing the case by attaching a cover over the base and sealing the case. The step of installing the conductive metal plate is punched and bent, and then folded up, so that the common terminal is upright, the normally open fixed terminal is upright with a predetermined gap from the common terminal, and the predetermined gap is from the normally open fixed terminal. A pattern forming process for forming a contact pattern comprising a normally closed fixed terminal that is provided with a normally closed contact that stands upright and is opposed to a normally open contact at the upper end of the normally open fixed terminal. The contact pattern formed by the pattern forming step is formed by a primary forming step of insert molding a filling portion that closes a gap between the normally open fixed terminal and the normally closed fixed terminal, and the primary forming step. A secondary molding step of insert molding a base provided with a protective wall surrounding the common terminal, the normally open fixed terminal, and the normally closed fixed terminal. Features.
本発明によれば、接点パターンとスイッチ機構部がベースの防護壁の内側に収容されており、その防護壁の外側にはカバーが密着して装着されるため、ケースの密閉性が確保される。また、二次成形工程においてベースが接点パターンにインサート成形されるため、ベースと共通端子、常開固定端子、及び常閉固定端子との間に隙間が生じない。したがって、ケースの内部に水滴や塵などが侵入するのを確実に防ぐことができ、接点パターンとスイッチ機構部の接触不良等の不具合をなくし、長期にわたって安定したスイッチ動作を保証することができる。 According to the present invention, the contact pattern and the switch mechanism are housed inside the protective wall of the base, and the cover is closely attached to the outer side of the protective wall, so that the case is sealed. . Further, since the base is insert-molded into the contact pattern in the secondary molding step, no gap is generated between the base and the common terminal, the normally open fixed terminal, and the normally closed fixed terminal. Therefore, it is possible to reliably prevent water drops, dust, and the like from entering the inside of the case, eliminate problems such as poor contact between the contact pattern and the switch mechanism, and ensure stable switch operation over a long period of time.
以下、本発明を実施するための形態について、図面を参照しながら説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
図１に示すように、本実施形態の防水防塵スイッチＳＷは、例えば電動パーキングブレーキ（ＥＰＢ）スイッチとして利用することができる小型のスイッチである。このスイッチの特徴は、使用時にケース１の内部のスイッチ機構部２に水滴や塵、埃などが侵入することを防ぐために、ケース１に防水防塵構造を採用したことにある。なお、例示した用途はあくまで一例であって、本発明は防水性や防塵性を求められる環境下で使用する他のスイッチとして利用することも可能である。 As shown in FIG. 1, the waterproof and dustproof switch SW of the present embodiment is a small switch that can be used as an electric parking brake (EPB) switch, for example. This switch is characterized in that a waterproof and dustproof structure is adopted for the case 1 in order to prevent water drops, dust, dust and the like from entering the switch mechanism 2 inside the case 1 during use. The illustrated application is merely an example, and the present invention can also be used as another switch used in an environment where waterproofness and dustproofness are required.
本実施形態の防水防塵スイッチＳＷは、密閉されたケース１の内部に、図２に示すようにスイッチ機構部２と接点パターン３を収容してなる。ケース１はスイッチ機構部２を保護するもので、スイッチ機構部２と接点パターン３が設置されたベース４と、ベース４の上に重ねて装着されるカバー５とから構成され、このベース４とカバー５の２重構造により内部のスイッチ機構部２を完全密閉する構造になっている。ここで、本実施形態の防水防塵スイッチＳＷは、ベース４の内部にスイッチ機構部２と接点パターン３を設置する工程と、ベース４の上からカバー５を装着してケース１を密閉する工程とを経て製造される。また、ベース４の内部に接点パターン３を設置する工程は、図３に示すパターン形成工程と、図４に示す一次成形工程と、図５に示す二次成形工程とを含む。 The waterproof and dustproof switch SW of the present embodiment is configured by housing a switch mechanism portion 2 and a contact pattern 3 in a sealed case 1 as shown in FIG. The case 1 protects the switch mechanism section 2 and is composed of a base 4 on which the switch mechanism section 2 and the contact pattern 3 are installed, and a cover 5 that is mounted on the base 4 in an overlapping manner. Due to the double structure of the cover 5, the internal switch mechanism 2 is completely sealed. Here, the waterproof and dustproof switch SW of the present embodiment includes a step of installing the switch mechanism portion 2 and the contact pattern 3 inside the base 4, a step of attaching the cover 5 from above the base 4 and sealing the case 1. It is manufactured through. Moreover, the process of installing the contact pattern 3 inside the base 4 includes a pattern forming process shown in FIG. 3, a primary forming process shown in FIG. 4, and a secondary forming process shown in FIG.
まずパターン形成工程では、図６に示すような一枚の導電性金属板（本実施形態では黄銅板）を所定形状に打ち抜き加工した後、点線で示す部分を谷折りで、一点鎖線で示す部分を山折りで折り曲げ加工する。これにより、同図（ｂ）に示すように直立した共通端子６と、共通端子６から所定の隙間を隔てて直立した常開固定端子７と、常開固定端子７から所定の隙間を隔てて直立した常閉固定端子８とを備えた接点パターン３が形成される。また、共通端子６の内側面には後述のコンタクトプレート１８を係止する切欠き部９が形成されるとともに、常開固定端子７の上端に常開接点１０が設けられ、この常開接点１０と対向するように常閉固定端子８の先端に常閉接点１１が設けられる。なお、常開接点１０と常閉接点１１に相当する部分に限定してめっき処理を施しても良い。 First, in the pattern formation step, after punching a single conductive metal plate (brass plate in this embodiment) as shown in FIG. 6 into a predetermined shape, the portion indicated by the dotted line is a valley fold, and the portion indicated by the alternate long and short dash line Is folded in a mountain fold. Thus, as shown in FIG. 5B, the common terminal 6 upright, the normally open fixed terminal 7 upright with a predetermined gap from the common terminal 6, and the predetermined gap from the normally open fixed terminal 7 are separated. A contact pattern 3 having an upright normally closed fixed terminal 8 is formed. Further, a notch 9 for locking a contact plate 18 described later is formed on the inner surface of the common terminal 6, and a normally open contact 10 is provided at the upper end of the normally open fixed terminal 7. A normally closed contact 11 is provided at the tip of the normally closed fixed terminal 8 so as to oppose to each other. Note that the plating process may be performed only on portions corresponding to the normally open contact 10 and the normally closed contact 11.
次に一次成形工程では、パターン形成工程で形成された接点パターン３について、図４に示すように常開固定端子７と常閉固定端子８との間の隙間を塞ぐように充填部１２をインサート成形する。すなわち、接点パターン３を成形機（図示略）の型板にセットし、一次用金型で型締めした後、キャビティ内に樹脂材料（本実施形態ではＰＢＴ樹脂）を射出して充填部１２を形成する。この一次成形工程において、充填部１２を常開固定端子７と常閉固定端子８との間の隙間に限定して形成する理由は、次の二次成形工程において射出した樹脂材料がこの隙間を通って常開接点１０と常閉接点１１との間に流れ込むのを阻止し、成形品の上下方向の型抜きを可能にするためである。 Next, in the primary forming step, the contact portion 3 formed in the pattern forming step is inserted with the filling portion 12 so as to close the gap between the normally open fixed terminal 7 and the normally closed fixed terminal 8 as shown in FIG. Mold. That is, the contact pattern 3 is set on a mold plate of a molding machine (not shown), clamped with a primary mold, and then a resin material (PBT resin in this embodiment) is injected into the cavity to fill the filling portion 12. Form. In this primary molding process, the reason why the filling portion 12 is limited to the gap between the normally open fixed terminal 7 and the normally closed fixed terminal 8 is that the resin material injected in the next secondary molding process has this gap. This is for preventing the flow between the normally open contact 10 and the normally closed contact 11 and allowing the molded product to be released in the vertical direction.
続く二次成形工程では、一次成形工程で成形された充填部付きの接点パターン３について、図５に示すように所定形状のベース４をインサート成形する。すなわち、充填部付きの接点パターン３をセットした状態のまま型板を回転させ、二次用金型で型締めした後、キャビティ内に樹脂材料（本実施形態ではＰＢＴ樹脂）を射出してベース４を形成する。これにより、共通端子６、常開固定端子７、及び常閉固定端子８の周囲を取り囲む防護壁１３を備えた有底箱型のベース本体が設けられ、ベース本体の内部に部品を収容する空間部１４が形成される。また、図７に示すように、ベース本体の内部には後述のアクチュエータ１７を支持する受け部１５が設けられ、ベース本体の左右外側面にはカバー５を装着するための係止爪１６が設けられる。 In the subsequent secondary molding step, the base 4 having a predetermined shape is insert-molded as shown in FIG. 5 for the contact pattern 3 with the filling portion molded in the primary molding step. That is, the mold plate is rotated while the contact pattern 3 with the filling portion is set, the mold is clamped with a secondary mold, and a resin material (PBT resin in the present embodiment) is injected into the cavity to form a base. 4 is formed. As a result, a bottomed box-type base body having a protective wall 13 surrounding the common terminal 6, the normally open fixed terminal 7, and the normally closed fixed terminal 8 is provided, and a space for housing components inside the base body Part 14 is formed. Further, as shown in FIG. 7, a receiving portion 15 for supporting an actuator 17 described later is provided inside the base body, and locking claws 16 for attaching the cover 5 are provided on the left and right outer surfaces of the base body. It is done.
次にスイッチ機構部２の構造を説明する。スイッチ機構部２は外力の作用により接点を切り換えるもので、本実施形態では操作体の押圧動作により接点を切り換える押ボタン式スイッチを採用している。このスイッチ機構部２は、アクチュエータ１７と、コンタクトプレート１８と、コイルばね１９を備えて構成されている。 Next, the structure of the switch mechanism unit 2 will be described. The switch mechanism 2 switches contacts by the action of an external force. In this embodiment, a push button switch that switches contacts by the pressing operation of the operating body is employed. The switch mechanism unit 2 includes an actuator 17, a contact plate 18, and a coil spring 19.
図８に示すように、アクチュエータ１７は、ステンレス製のばね材を折り曲げ加工した板ばね片からなり、一端に操作部２０、他端に支持片２１が設けられ、中央にコイルばね１９を取り付ける取付孔２２が形成されている。また、図９に示すように、コンタクトプレート１８は、りん青銅製の２枚の可動接触片２３を樹脂製のプレート２４で連結してなり、可動接触片２３の一端に凹部２５、他端に可動接点２６が設けられ、プレート２４の中央にコイルばね１９を取り付ける取付孔２７が形成されている。なお、本実施形態では全く同じ形状の可動接触片２３を２枚設けてあるが、これは一方の可動接触片２３の故障や誤作動による障害が発生した場合でも、他方の可動接触片２３が正常に動作することによって安全性を確保するフェイルセーフ機能を持たせるためである。 As shown in FIG. 8, the actuator 17 is made of a leaf spring piece formed by bending a stainless spring material. The actuator 17 is provided with an operation portion 20 at one end, a support piece 21 at the other end, and a coil spring 19 attached at the center. A hole 22 is formed. As shown in FIG. 9, the contact plate 18 is formed by connecting two movable contact pieces 23 made of phosphor bronze with a resin plate 24, with a concave portion 25 at one end of the movable contact piece 23 and at the other end. A movable contact 26 is provided, and a mounting hole 27 for attaching the coil spring 19 is formed in the center of the plate 24. In this embodiment, two movable contact pieces 23 having exactly the same shape are provided. However, even if one movable contact piece 23 breaks down or malfunctions due to malfunction, the other movable contact piece 23 is This is to provide a fail-safe function for ensuring safety by operating normally.
そして、図２に示したように、コイルばね１９の一方のフック２８をアクチュエータ１７の取付孔２２に引っ掛けて固定し、コイルばね１９の他方のフック２９をコンタクトプレート１８の取付孔２７に引っ掛けて固定することにより、アクチュエータ１７とコンタクトプレート１８がコイルばね１９を介して連結される。また、これをベース４の空間部１４に収容し、アクチュエータ１７の支持片２１をベース４の受け部１５に載せて支持し、コンタクトプレート１８の凹部２５を共通端子６の切欠き部９に係止する。これにより、アクチュエータ１７とコンタクトプレート１８がコイルばね１９のばね力によって付勢支持された状態になる。 Then, as shown in FIG. 2, one hook 28 of the coil spring 19 is hooked and fixed to the mounting hole 22 of the actuator 17, and the other hook 29 of the coil spring 19 is hooked to the mounting hole 27 of the contact plate 18. By fixing, the actuator 17 and the contact plate 18 are connected via the coil spring 19. Further, this is accommodated in the space portion 14 of the base 4, the support piece 21 of the actuator 17 is supported by being placed on the receiving portion 15 of the base 4, and the concave portion 25 of the contact plate 18 is engaged with the notch portion 9 of the common terminal 6. Stop. As a result, the actuator 17 and the contact plate 18 are biased and supported by the spring force of the coil spring 19.
さらに、この状態で図１に示すようにベース４の上からカバー５を被せ、ベース４の係止爪１６をカバー５の係止孔３０に嵌め込むことにより、内部のスイッチ機構部２と接点パターン３が密閉され、密閉性に優れた防水防塵スイッチＳＷが完成する。なお、図示していないが、ベース４とカバー５の嵌合部分にはシリコーンゴムが介挿されているため、ケース１の密閉性が更に高められている。 Further, in this state, as shown in FIG. 1, the cover 5 is covered from above the base 4, and the locking claw 16 of the base 4 is fitted into the locking hole 30 of the cover 5. The pattern 3 is sealed, and the waterproof and dustproof switch SW excellent in sealing performance is completed. Although not shown, since silicone rubber is inserted in a fitting portion between the base 4 and the cover 5, the sealing performance of the case 1 is further enhanced.
最後に本実施形態の防塵防水スイッチＳＷの動作について、図１０〜１２を参照しながら説明する。図面ではスイッチ機構部２の構造を分かりやすくするため、ベース４からカバー５を取り外した状態を示してある。 Finally, the operation of the dustproof and waterproof switch SW of the present embodiment will be described with reference to FIGS. In the drawing, the state in which the cover 5 is removed from the base 4 is shown for easy understanding of the structure of the switch mechanism section 2.
図１０に示すように、スイッチ機構部２に外力が付与されていないときには、コイルばね１９のばね力によって可動接触片２３が常閉固定端子８に付勢され、可動接点２６が常閉接点１１に所定の圧力で接触している。このため、共通端子６と常閉接点１１がコンタクトプレート１８を介して接続されており、図１に示すａ−ｂ回路とｄ−ｅ回路が導通している。これがスイッチ機構部２の自由位置の状態である。 As shown in FIG. 10, when no external force is applied to the switch mechanism 2, the movable contact piece 23 is urged toward the normally closed fixed terminal 8 by the spring force of the coil spring 19, and the movable contact 26 is connected to the normally closed contact 11. At a predetermined pressure. For this reason, the common terminal 6 and the normally closed contact 11 are connected via the contact plate 18, and the ab circuit and the de circuit shown in FIG. 1 are conducted. This is the state of the switch mechanism 2 in the free position.
ここで、図１１に示すように、スイッチ機構部２に外力が付与されると、操作部２０が押され、アクチュエータ１７が支持片２１を支点に押し下げられる。そして、このアクチュエータ１７の動きに連動して可動接触片２３が撓み始める。これがスイッチ機構部２のＯＮ開始位置の状態である。 Here, as shown in FIG. 11, when an external force is applied to the switch mechanism portion 2, the operation portion 20 is pushed, and the actuator 17 is pushed down with the support piece 21 as a fulcrum. The movable contact piece 23 begins to bend in conjunction with the movement of the actuator 17. This is the state of the ON start position of the switch mechanism unit 2.
さらに、図１２に示すように、操作部２０が押し込まれると、可動接触片２３が凹部２５を支点に反転する。これにより、可動接点２６が常閉接点１１から離れ、常開接点１０に所定の圧力で接触する。このため、共通端子６と常閉接点１１の接続が絶たれ、共通端子６と常開接点１０がコンタクトプレート１８を介して接続され、図１に示すａ−ｃ回路とｄ−ｆ回路に切り換わる。これがスイッチ機構部２の全移動位置の状態である。 Furthermore, as shown in FIG. 12, when the operation unit 20 is pushed in, the movable contact piece 23 is reversed with the recess 25 as a fulcrum. As a result, the movable contact 26 is separated from the normally closed contact 11 and contacts the normally open contact 10 with a predetermined pressure. For this reason, the connection between the common terminal 6 and the normally closed contact 11 is cut off, and the common terminal 6 and the normally open contact 10 are connected via the contact plate 18 to switch between the ac circuit and the df circuit shown in FIG. Change. This is the state of all the movement positions of the switch mechanism section 2.
また、スイッチ機構部２への外力が解除されると、コイルばね１９のばね力によって可動接触片２３が反転し、可動接点２６が常開接点１０から離れて常閉接点１１に接触し、図１０に示す元の自由位置の状態に復帰する。なお、本実施形態では、常開接点１０と常閉接点１１が共に打ち抜き加工された導電性金属板の側面に設けられており、可動接点２６が常開接点１０または常閉接点１１に対して線接触する構造になっているため、面接触する構造に比べて接点同士の接触感度を良好なものとすることができる。 When the external force to the switch mechanism 2 is released, the movable contact piece 23 is reversed by the spring force of the coil spring 19, and the movable contact 26 is separated from the normally open contact 10 and contacts the normally closed contact 11. 10 returns to the original free position state. In this embodiment, the normally open contact 10 and the normally closed contact 11 are both provided on the side surface of the punched conductive metal plate, and the movable contact 26 is connected to the normally open contact 10 or the normally closed contact 11. Since the structure is in line contact, the contact sensitivity between the contacts can be improved compared to the structure in surface contact.
以上のように構成された防水防塵スイッチＳＷによれば、スイッチ機構部２と接点パターン３がベース４の防護壁１３の内側に収容されており、しかもその防護壁１３の外側にはカバー５が密着して装着されているため、ケース１の密閉性が確保される。また、二次成形工程においてベース４が接点パターン３にインサート成形されるため、ベース４と共通端子６、常開固定端子７、及び常閉固定端子８との間に隙間がまったく生じない。このため、ケース１の内部に水滴や塵などが侵入するのを確実に防ぐことができる。したがって、ベース４の内側に収容されたスイッチ機構部２と接点パターン３の錆付きや接触不良が起こらず、誤作動をなくし、長期にわたって安定したスイッチ動作を保証することができる。 According to the waterproof and dustproof switch SW configured as described above, the switch mechanism portion 2 and the contact pattern 3 are accommodated inside the protective wall 13 of the base 4, and the cover 5 is disposed outside the protective wall 13. Since it is attached in close contact, the sealing property of the case 1 is ensured. Further, since the base 4 is insert-molded into the contact pattern 3 in the secondary molding step, no gap is generated between the base 4 and the common terminal 6, the normally open fixed terminal 7, and the normally closed fixed terminal 8. For this reason, it is possible to reliably prevent water droplets and dust from entering the case 1. Therefore, the switch mechanism portion 2 accommodated inside the base 4 and the contact pattern 3 are not rusted or poorly contacted, so that malfunctions are eliminated and stable switch operation can be ensured over a long period of time.
ＳＷ…防水防塵スイッチ
１…ケース
２…スイッチ機構部
３…接点パターン
４…ベース
５…カバー
６…共通端子
７…常開固定端子
８…常閉固定端子
９…切欠き部
１０…常開接点
１１…常閉接点
１２…充填部
１３…防護壁
１４…空間部
１５…受け部
１６…係止爪
１７…アクチュエータ
１８…コンタクトプレート
１９…コイルばね
２０…操作部
２１…支持片
２２…取付孔
２３…可動接触片
２４…プレート
２５…凹部
２６…可動接点
２７…取付孔
２８…フック
２９…フック
３０…係止孔
SW ... Waterproof dustproof switch 1 ... Case 2 ... Switch mechanism part 3 ... Contact pattern 4 ... Base 5 ... Cover 6 ... Common terminal 7 ... Normally open fixed terminal 8 ... Normally closed fixed terminal 9 ... Notched part 10 ... Normally open contact 11 ... Normally closed contact 12 ... Filling part 13 ... Protective wall 14 ... Space part 15 ... Receiving part 16 ... Locking claw 17 ... Actuator 18 ... Contact plate 19 ... Coil spring 20 ... Operation part 21 ... Supporting piece 22 ... Mounting hole 23 ... Movable contact piece 24 ... plate 25 ... concave 26 ... movable contact point 27 ... mounting hole 28 ... hook 29 ... hook 30 ... locking hole
Claims (3)
前記ケースは、
内部に前記接点パターンと前記スイッチ機構部が設置されたベースと、
前記ベースの上に重ねて装着されるカバーと、から構成されており、
前記ベースは、
打ち抜き加工された導電性金属板が折り曲げられ、直立した共通端子、共通端子から所定の隙間を隔てて直立した常開固定端子、及び常開固定端子から所定の隙間を隔てて直立し、かつ、常開固定端子の上端の常開接点に対向する常閉接点が設けられた常閉固定端子からなる接点パターンと、前記接点パターンの前記常開固定端子と前記常閉固定端子との間の隙間を塞ぐ充填部と、がインサート成形されており、前記共通端子、前記常開固定端子、及び前記常閉固定端子の周囲を取り囲む防護壁が設けられている
ことを特徴とする防水防塵スイッチ。 A waterproof and dustproof switch in which a contact pattern and a switch mechanism are housed in a sealed case,
The case is
A base in which the contact pattern and the switch mechanism are installed;
A cover that is mounted on top of the base,
The base is
The punched conductive metal plate is bent, upright common terminal, a normally open fixed terminal upright with a predetermined gap from the common terminal, and upright with a predetermined gap from the normally open fixed terminal, and A contact pattern composed of a normally closed fixed terminal provided with a normally closed contact facing the normally open contact at the upper end of the normally open fixed terminal, and a gap between the normally open fixed terminal and the normally closed fixed terminal of the contact pattern A waterproof and dustproof switch, characterized in that a filling portion is formed by insert molding, and a protective wall surrounding the common terminal, the normally open fixed terminal, and the normally closed fixed terminal is provided.
ことを特徴とする請求項１に記載の防水防塵スイッチ。 The normally open contact and the normally closed contact are both provided on the side surface of the punched conductive metal plate, and the movable contact that constitutes the switch mechanism portion is in contact with the normally open contact and the normally closed contact. The waterproof and dustproof switch according to claim 1, wherein the waterproof and dustproof switch has a structure in line contact.
前記ケースを構成するベースの内部に接点パターンとスイッチ機構部を設置する工程と、
前記ベースの上にカバーを重ねて装着してケースを密閉する工程と、を有し、
前記ベースの内部に接点パターンを設置する工程は、
導電性金属板を打ち抜き加工した後に折り曲げることにより、直立した共通端子と、共通端子から所定の隙間を隔てて直立した常開固定端子と、常開固定端子から所定の隙間を隔てて直立し、かつ、常開固定端子の上端の常開接点に対向する常閉接点が設けられた常閉固定端子と、からなる接点パターンを形成するパターン形成工程と、
前記パターン形成工程により形成された接点パターンについて、前記常開固定端子と前記常閉固定端子との間の隙間を塞ぐ充填部をインサート成形する一次成形工程と、
前記一次成形工程により成形された充填部付きの接点パターンについて、前記共通端子、前記常開固定端子、及び前記常閉固定端子の周囲を取り囲む防護壁が設けられたベースをインサート成形する二次成形工程と、
を含むことを特徴とする防水防塵スイッチの製造方法。 A method for manufacturing a waterproof and dustproof switch comprising a contact pattern and a switch mechanism housed in a sealed case,
A step of installing a contact pattern and a switch mechanism inside the base constituting the case;
And a step of sealing the case by attaching a cover over the base, and
The step of installing a contact pattern inside the base includes
By punching the conductive metal plate and bending it, the upright common terminal, the normally open fixed terminal that is upright with a predetermined gap from the common terminal, and the upright fixed terminal with the predetermined gap are upright, And a normally closed fixed terminal provided with a normally closed contact facing the normally open contact at the upper end of the normally open fixed terminal, and a pattern forming step for forming a contact pattern,
For the contact pattern formed by the pattern forming step, a primary molding step of insert molding a filling portion that closes a gap between the normally open fixed terminal and the normally closed fixed terminal;
Secondary molding that insert-molds a base provided with a protective wall surrounding the common terminal, the normally-open fixed terminal, and the normally-closed fixed terminal with respect to the contact pattern with the filler formed by the primary molding step. Process,
A method for manufacturing a waterproof and dustproof switch.
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| CN107170628A (en) * | 2017-07-04 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of disconnecting switch easily turned off |
| CN109841438A (en) * | 2018-08-28 | 2019-06-04 | 惠州市正牌科电有限公司 | A kind of dustproof construction of microswitch |
| WO2020075443A1 (en) * | 2018-10-09 | 2020-04-16 | Smk株式会社 | Switch |
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| JP2003288820A (en) * | 2002-03-27 | 2003-10-10 | Alps Electric Co Ltd | Tightly sealed push switch |
| JP2012033461A (en) * | 2010-07-05 | 2012-02-16 | Omron Corp | Switch |
| JP2012084386A (en) * | 2010-10-12 | 2012-04-26 | Omron Corp | Switch |
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| JP2003288820A (en) * | 2002-03-27 | 2003-10-10 | Alps Electric Co Ltd | Tightly sealed push switch |
| JP2012033461A (en) * | 2010-07-05 | 2012-02-16 | Omron Corp | Switch |
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| CN107170628A (en) * | 2017-07-04 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of disconnecting switch easily turned off |
| CN109841438A (en) * | 2018-08-28 | 2019-06-04 | 惠州市正牌科电有限公司 | A kind of dustproof construction of microswitch |
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| WO2020075443A1 (en) * | 2018-10-09 | 2020-04-16 | Smk株式会社 | Switch |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |