JP3631926B2

JP3631926B2 - Electrical component sealing structure

Info

Publication number: JP3631926B2
Application number: JP25357799A
Authority: JP
Inventors: 紀男小野寺; 孝志伊藤; 強相澤
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1999-09-07
Filing date: 1999-09-07
Publication date: 2005-03-23
Anticipated expiration: 2019-09-07
Also published as: JP2001077503A

Description

【０００１】
【発明の属する技術分野】
本発明は、洗濯機に用いられるパネルスイッチ等の防水に好適な電気部品の封止構造に関する。
【０００２】
【従来の技術】
従来の電気部品の封止構造を図２に基づいて説明すると、洗濯機のシャーシ等からなる取付部２１には、パネルスイッチとしてのメンブレンスイッチ２２が接着剤（図示せず）等によって取り付けられている。
そして、このメンブレンスイッチ２２は、配線パターン（図示せず）と固定接点２３を有するフイルム状部材からなる下部の第１の絶縁基板２４と、可動接点２５を有し、スペーサ部材２６を介して第１の絶縁基板２４上に配置されたフイルム状部材からなる上部の第２の絶縁基板２７とで構成されている。
【０００３】
また、スペーサ部材２６と第２の絶縁基板２７には、第１の絶縁基板２４上に設けた配線パターンが露出するように設けられた開口部２８を有し、この開口部２８内において、ＬＥＤ等の表示素子からなる電気部品２９が配線パターンに半田付けによって接続されている。
【０００４】
また、開口部２８から水等が侵入しないように、開口部２８を接着剤等からなる絶縁性シール材３０で封止した構成となっている。
そして、この絶縁性シール材３０を開口部２８に充填した時、絶縁性シール材３０は、開口部２８から溢れて、第２の絶縁基板２７の可動接点２５の近傍部まではみ出た状態となっている。
【０００５】
このような構成を有する従来の電気部品の動作は、先ず、第２の絶縁基板２７の上部を押圧すると、第２の絶縁基板２７が撓んで、可動接点２５が固定接点２３に接触して、例えば、洗濯の種類を選択し、電気部品２９である表示素子には洗濯にかかる時間（タイマー）が表示される。
そして、押圧を解除すると、第２の絶縁基板２７の撓みが元に戻り、可動接点２５が固定接点２３から離れて、ＯＦＦの状態となる。
また、洗濯機が稼働すると、順次表示素子の時間（タイマー）の表示を変えるようになるものである。
【０００６】
【発明が解決しようとする課題】
従来の電気部品の封止構造は、開口部２８に絶縁性シール材３０を充填するものであるため、絶縁性シール材３０が開口部２８から溢れて周囲にはみ出て、外観性が悪くなるという問題がある。
また、はみ出た絶縁性シール材３０は、第２の絶縁基板２７の可動接点２５の近傍部まで位置し、メンブレンスイッチ２２においては、第２の絶縁基板２７の作動力等が変化する等の不具合が生じるという問題がある。
そこで、本発明は、外観の見栄えが良く、スイッチ部の動作の良好な電気部品の封止構造を提供するものである。
【０００７】
【課題を解決するための手段】
上記課題を解決するための第１の解決手段として、配線パターンを有する第１の絶縁基板と、該第１の絶縁基板上に載置され、前記配線パターンに接続された電気部品と、前記第１の絶縁基板上に配置された第２の絶縁基板とを備え、前記第２の絶縁基板には、頂部に前記電気部品を通す開口部を有し、前記電気部品の外周部を囲むように形成された立ち上がり部を設け、該立ち上がり部と前記第１の絶縁基板とで構成される空間部に絶縁性シールド材を充填して、前記空間部内の前記配線パターンと前記電気部品の電気的露出部を封止した構成とした。
【０００８】
また、第２の解決手段として、前記立ち上がり部は、前記第２の絶縁基板の前記立ち上がり部の根本部から前記電気部品に近づくに従って漸次立ち上がるような傾斜部で構成した。
また、第３の解決手段として、前記開口部の縁部と前記電気部品との間に隙間を設けた構成とした。
【０００９】
また、第４の解決手段として、前記第１の絶縁基板には、固定接点を設け、前記第２の絶縁基板は、可動接点を設けたフイルム状部材で形成し、前記フイルム状部材を押圧した時、前記フイルム状部材が変形して、前記可動接点を前記固定接点に接触させるようにしたスイッチ部を設けた構成とした。
【００１０】
また、第５の解決手段として、前記可動接点、及び前記固定接点が前記立ち上がり部の近傍に設けられた構成とした。
また、第６の解決手段として、前記電気部品は、表示素子で形成され、該表示素子の表示部が設けられた上表面部が前記開口部から外方に突出した構成とした。
【００１１】
【発明の実施の形態】
本発明の電気部品の封止構造を図１に基づいて説明すると、洗濯機のシャーシ等からなる取付部１には、パネルスイッチとしてのメンブレンスイッチからなるスイッチ部２が接着剤（図示せず）等によって取り付けられている。
そして、このスイッチ部２は、カーボンに覆われた銀パターンからなる配線パターン（図示せず）と固定接点３とを有するポリエステルのフイルム状部材からなる下部の第１の絶縁基板４と、カーボンからなる可動接点５を有し、スペーサ部材６を介して第１の絶縁基板４上に配置されたポリエステルのフイルム状部材からなる上部の第２の絶縁基板７とで構成されている。
また、スペーサ部材６は、ポリエステルフイルムの両面に粘着材が予め設けられた所謂両面粘着シート状のものであり、この粘着材により、第１の絶縁基板４，スペーサ部材６，第２の絶縁基板７がこの順に積層されて一体化されている。
【００１２】
また、スペーサ部材６には、第１の絶縁基板４上に設けた配線パターンが露出するように設けられた矩形状の開口部６ａが設けられると共に、この開口部６ａと対向する箇所において、第２の絶縁基板７には、頂部に開口部７ａを有し、第２の絶縁基板７の基部（平面部）との結合部である根本部から開口部７ａに行くに従って漸次立ち上がるような傾斜状をなした四角錐状の立ち上がり部７ｂが形成されている。
なお、この立ち上がり部７ｂは、四角錐台状の他に円錐台状、或いは円筒、四角筒でも良く、第２の絶縁基板７をプレス加工することによって形成している。
【００１３】
そして、この立ち上がり部７ｂと開口部６ａ及び第１の絶縁基板４との間には空間部８が形成されたものとなっている。
また、ＬＥＤ等の表示素子からなる電気部品９は、数字等をセグメント表示する表示部を備えた上表面部９ａが開口部７ａから外方に突出した状態で、一部が空間部８内に配置されると共に、第１の絶縁基板４上に載置されて、電気部品９の端子９ｂが対応する配線パターンに低融点半田による半田付けによって接続されている。
そして、電気部品９が開口部７ａに通された際、電気部品９の外周部を囲んだ立ち上がり部７ｂの開口部７ａの縁部と電気部品９との間には、隙間１０が形成されるようになっている。
この構成によって、立ち上がり部７ｂは、立ち上がり部７ｂの根本部から電気部品９に近づくに従って漸次立ち上がるような傾斜部となっている。
【００１４】
また、開口部７ａから水等が侵入しないように、液状のエポキシ系の接着剤等からなる絶縁性シール材１１を、開口部７ａから空間部８に充填して、乾燥させることにより、空間部８を封止すると共に、電気部品９を固定した構成となっている。
そして、この絶縁性シール材１１を空間部８に充填した時、絶縁性シール材１１は、立ち上がり部７ｂによって、第２の絶縁基板７の可動接点５の近傍まではみ出ることが無く、見栄えの良いものとなる。
ここで、絶縁性シール材１１は、空間部８内に隙間無く充填する必要はなく、空間部８内に位置する電気的露出部、即ち、配線パターン、電気部品９の端子９ｂ、配線パターンと端子９ｂとの接続部（半田付け部）が少なくとも絶縁性シール材１１で封止されていれば良い。
【００１５】
このような構成を有する本発明の電気部品の動作は、先ず、第２の絶縁基板７の上部を押圧すると、第２の絶縁基板７が撓んで、可動接点５が固定接点３に接触して、例えば、洗濯の種類を選択し、電気部品９である表示素子には洗濯にかかる時間（タイマー）が表示される。
そして、押圧を解除すると、第２の絶縁基板７の撓みが元に戻り、可動接点５が固定接点３から離れて、ＯＦＦの状態となる。
また、洗濯機が稼働すると、順次表示素子の時間（タイマー）の表示を変えるようになるものである。
【００１６】
【発明の効果】
本発明の電気部品の封止構造において、第２の絶縁基板７には、頂部に電気部品９を通す開口部７ａを有し、電気部品９の外周部を囲むように形成された立ち上がり部７ｂを設け、該立ち上がり部７ｂと第１の絶縁基板４とで構成される空間部８に絶縁性シール材１１を充填して、空間部８内の配線パターンと電気部品９の電気的露出部（活電部）を封止したため、空間部８に充填された絶縁性シール材１１は、立ち上がり部７ｂにより阻止されて第２の絶縁基板７の表面にはみ出すこがなく、見栄えの良好な電気部品の封止構造が提供できる。
【００１７】
また、立ち上がり部７ｂは、第２の絶縁基板７の立ち上がり部７ｂから電気部品９に近づくに従って漸次立ち上がるような傾斜部で構成したため、立ち上がり部７ｂをプレス加工等で容易に形成可能であると共に、空間部８を小さくできて、絶縁性シール材１１が少なく安価にできる。
また、絶縁性シール材１１の露出を少なくできて、見栄えの良い電気部品の封止構造を提供できる。
また、開口部７ｂの縁部と電気部品９との間に隙間１０を設けたため、この隙間１０から絶縁性シール材１１の空間部８への充填が容易にでき、従来とその作業工程を変更することがなく、作業性の良好な電気部品の封止構造を提供できる。
【００１８】
また、第１の絶縁基板４には、固定接点３を設け、第２の絶縁基板７は、可動接点５を設けたフイルム状部材で形成し、フイルム状部材を押圧した時、フイルム状部材が変形して、可動接点５を固定接点３に接触させるようにしたスイッチ部２を設けたため、メンブレンスイッチ（フイルム状スイッチ）装置を構成する一方の絶縁基板を、立ち上がり部７ｂが形成された第２の絶縁基板７として利用することができるので、絶縁性シール材１１の流れ出し防止のために、別途絶縁基板を必要としない。
また、空間部８に充填された絶縁性シール材１１は、立ち上がり部７ｂにより阻止されて第２の絶縁基板７の表面にはみ出すこがなく、第２の絶縁基板７の作動力が変化せず、安定した操作ができる電気部品の封止構造を提供できる。
【００１９】
また、可動接点５、及び固定接点３が立ち上がり部７ｂの近傍に設けられたため、小型化されたものにおいても、絶縁性シール材１１は、立ち上がり部７ｂにより阻止されて第２の絶縁基板７の表面にはみ出すこがなく、第２の絶縁基板７の作動力が変化せず、安定した操作ができ、スイッチ部２を備えたものにおいて好適な電気部品の封止構造を提供できる。
【００２０】
また、電気部品９は、表示素子で形成され、該表示素子の表示部が設けられた上表面部９ａが開口部７ａから外方に突出したため、表示部が絶縁性シール材１１に覆われることなく、特に、表示素子の表示部が露出して目視できる電気部品の封止構造を提供できる。
【図面の簡単な説明】
【図１】本発明の電気部品の封止構造を示す要部断面図。
【図２】従来の電気部品の封止構造を示す要部断面図。
【符号の説明】
１取付部
２スイッチ部
３固定接点
４第１の絶縁基板
５可動接点
６スペーサ部材
６ａ開口部
７第２の絶縁基板
７ａ開口部
７ｂ立ち上がり部
８空間部
９電気部品
９ａ上表面部
９ｂ端子
１０隙間
１１絶縁性シール材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing structure for electrical parts suitable for waterproofing, such as a panel switch used in a washing machine.
[0002]
[Prior art]
A conventional sealing structure for electrical parts will be described with reference to FIG. 2. A membrane switch 22 as a panel switch is attached to an attachment portion 21 made of a washing machine chassis or the like by an adhesive (not shown) or the like. Yes.
The membrane switch 22 has a lower first insulating substrate 24 made of a film-like member having a wiring pattern (not shown) and a fixed contact 23, a movable contact 25, and a first member via a spacer member 26. And an upper second insulating substrate 27 made of a film-like member disposed on one insulating substrate 24.
[0003]
In addition, the spacer member 26 and the second insulating substrate 27 have an opening 28 provided so that the wiring pattern provided on the first insulating substrate 24 is exposed. An electrical component 29 composed of a display element such as is connected to the wiring pattern by soldering.
[0004]
Further, the opening 28 is sealed with an insulating sealing material 30 made of an adhesive or the like so that water or the like does not enter from the opening 28.
When the insulating sealing material 30 is filled in the opening 28, the insulating sealing material 30 overflows from the opening 28 and protrudes to the vicinity of the movable contact 25 of the second insulating substrate 27. ing.
[0005]
In the operation of the conventional electrical component having such a configuration, first, when the upper portion of the second insulating substrate 27 is pressed, the second insulating substrate 27 is bent, and the movable contact 25 comes into contact with the fixed contact 23. For example, the type of washing is selected, and the time required for washing (timer) is displayed on the display element that is the electrical component 29.
When the pressing is released, the bending of the second insulating substrate 27 returns to the original state, and the movable contact 25 is separated from the fixed contact 23 and is turned off.
Further, when the washing machine is operated, the display of time (timer) of the display elements is sequentially changed.
[0006]
[Problems to be solved by the invention]
Since the conventional sealing structure for electrical components is such that the opening 28 is filled with the insulating sealing material 30, the insulating sealing material 30 overflows from the opening 28 and protrudes to the surroundings, resulting in poor appearance. There's a problem.
Further, the protruding insulating sealing material 30 is located up to the vicinity of the movable contact 25 of the second insulating substrate 27, and the membrane switch 22 has a problem such as an operating force of the second insulating substrate 27 changing. There is a problem that occurs.
Therefore, the present invention provides a sealing structure for an electrical component that has a good appearance and a good operation of the switch portion.
[0007]
[Means for Solving the Problems]
As a first means for solving the above problems, a first insulating substrate having a wiring pattern, an electrical component mounted on the first insulating substrate and connected to the wiring pattern, and the first A second insulating substrate disposed on the first insulating substrate, the second insulating substrate having an opening through which the electric component passes at the top, and surrounding an outer peripheral portion of the electric component The formed rising portion is provided, and a space formed by the rising portion and the first insulating substrate is filled with an insulating shield material, and the wiring pattern and the electrical component in the space are electrically exposed. The part was sealed.
[0008]
Further, as a second solving means, the rising portion is configured as an inclined portion that gradually rises from the root of the rising portion of the second insulating substrate as it approaches the electrical component.
As a third solution, a gap is provided between the edge of the opening and the electrical component.
[0009]
As a fourth solution, the first insulating substrate is provided with a fixed contact, and the second insulating substrate is formed of a film-like member provided with a movable contact, and the film-like member is pressed. In some cases, the film-like member is deformed to provide a switch portion that brings the movable contact into contact with the fixed contact.
[0010]
As a fifth solution, the movable contact and the fixed contact are provided in the vicinity of the rising portion.
As a sixth solution, the electric component is formed of a display element, and an upper surface portion provided with a display portion of the display element protrudes outward from the opening.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The sealing structure of the electrical component of the present invention will be described with reference to FIG. 1. A switch portion 2 made of a membrane switch as a panel switch is attached to an attachment portion 1 made of a chassis of a washing machine or the like (not shown). It is attached by etc.
The switch unit 2 includes a lower first insulating substrate 4 made of a polyester film-like member having a wiring pattern (not shown) made of a silver pattern covered with carbon and a fixed contact 3, and carbon. And an upper second insulating substrate 7 made of a polyester film-like member disposed on the first insulating substrate 4 with a spacer member 6 interposed therebetween.
The spacer member 6 is a so-called double-sided pressure-sensitive adhesive sheet in which an adhesive material is preliminarily provided on both sides of the polyester film, and the first insulating substrate 4, the spacer member 6, and the second insulating substrate are formed by this adhesive material. 7 are laminated and integrated in this order.
[0012]
In addition, the spacer member 6 is provided with a rectangular opening 6a provided so that the wiring pattern provided on the first insulating substrate 4 is exposed. The second insulating substrate 7 has an opening 7a at the top, and is inclined so as to gradually rise from the root portion, which is a joint portion with the base (planar portion) of the second insulating substrate 7, toward the opening 7a. A rising portion 7b having a quadrangular pyramid shape is formed.
The rising portion 7b may be a truncated cone shape, a cylinder shape, or a square tube shape in addition to the square frustum shape, and is formed by pressing the second insulating substrate 7.
[0013]
A space 8 is formed between the rising portion 7b, the opening 6a, and the first insulating substrate 4.
In addition, the electrical component 9 including a display element such as an LED is partially in the space 8 with the upper surface portion 9a provided with a display portion for displaying numbers and the like in a segment protruding outward from the opening 7a. In addition to being placed on the first insulating substrate 4, the terminals 9b of the electrical components 9 are connected to the corresponding wiring patterns by soldering with a low melting point solder.
When the electrical component 9 is passed through the opening 7a, a gap 10 is formed between the edge of the opening 7a of the rising portion 7b surrounding the outer periphery of the electrical component 9 and the electrical component 9. It is like that.
With this configuration, the rising portion 7b is an inclined portion that gradually rises from the root of the rising portion 7b toward the electrical component 9.
[0014]
In addition, by filling the space 8 with the insulating sealing material 11 made of a liquid epoxy-based adhesive or the like so as to prevent water or the like from entering from the opening 7a and drying, the space portion 8 is sealed and the electric component 9 is fixed.
When the insulating sealing material 11 is filled in the space 8, the insulating sealing material 11 does not protrude to the vicinity of the movable contact 5 of the second insulating substrate 7 due to the rising portion 7b, and has a good appearance. It will be a thing.
Here, the insulating sealing material 11 does not need to be filled in the space portion 8 without a gap, and an electrically exposed portion located in the space portion 8, that is, a wiring pattern, a terminal 9 b of the electrical component 9, a wiring pattern, The connection part (soldering part) with the terminal 9b should just be sealed with the insulating sealing material 11.
[0015]
The operation of the electrical component of the present invention having such a configuration is as follows. First, when the upper portion of the second insulating substrate 7 is pressed, the second insulating substrate 7 is bent and the movable contact 5 comes into contact with the fixed contact 3. For example, the type of washing is selected, and the time required for washing (timer) is displayed on the display element that is the electrical component 9.
When the pressing is released, the bending of the second insulating substrate 7 returns to the original state, and the movable contact 5 is separated from the fixed contact 3 and is turned off.
Further, when the washing machine is operated, the display of time (timer) of the display elements is sequentially changed.
[0016]
【The invention's effect】
In the electrical component sealing structure of the present invention, the second insulating substrate 7 has an opening 7 a through which the electrical component 9 passes at the top, and a rising portion 7 b formed so as to surround the outer periphery of the electrical component 9. The space 8 constituted by the rising portion 7b and the first insulating substrate 4 is filled with the insulating sealing material 11, and the wiring pattern in the space 8 and the electrically exposed portion of the electrical component 9 ( Since the insulating sealing material 11 filled in the space portion 8 is blocked by the rising portion 7b and does not protrude from the surface of the second insulating substrate 7, the electrical component having a good appearance is sealed. The sealing structure can be provided.
[0017]
Further, since the rising portion 7b is configured by an inclined portion that gradually rises from the rising portion 7b of the second insulating substrate 7 toward the electrical component 9, the rising portion 7b can be easily formed by pressing or the like. The space 8 can be made small, and the insulating sealing material 11 can be reduced and inexpensive.
Further, the exposure of the insulating sealing material 11 can be reduced, and a good-looking sealing structure for an electrical component can be provided.
In addition, since the gap 10 is provided between the edge of the opening 7b and the electrical component 9, it is possible to easily fill the space 8 with the insulating sealing material 11 from the gap 10 and change the conventional process. Therefore, it is possible to provide a sealing structure for an electrical component with good workability.
[0018]
The first insulating substrate 4 is provided with a fixed contact 3, and the second insulating substrate 7 is formed with a film-like member provided with a movable contact 5, and when the film-like member is pressed, the film-like member is Since the switch part 2 is provided so that the movable contact 5 is brought into contact with the fixed contact 3 by deformation, the second insulating part that forms the membrane switch (film switch) device is provided with the rising part 7b. Therefore, in order to prevent the insulating sealing material 11 from flowing out, a separate insulating substrate is not required.
Further, the insulating sealing material 11 filled in the space portion 8 is blocked by the rising portion 7b and does not protrude to the surface of the second insulating substrate 7, and the operating force of the second insulating substrate 7 does not change. It is possible to provide a sealing structure for an electrical component that can be stably operated.
[0019]
In addition, since the movable contact 5 and the fixed contact 3 are provided in the vicinity of the rising portion 7b, the insulating sealing material 11 is blocked by the rising portion 7b even when the size is reduced. There is no protrusion on the surface, the operating force of the second insulating substrate 7 does not change, a stable operation can be performed, and a suitable electrical component sealing structure provided with the switch unit 2 can be provided.
[0020]
The electrical component 9 is formed of a display element, and the upper surface portion 9a provided with the display portion of the display element protrudes outward from the opening 7a, so that the display portion is covered with the insulating sealing material 11. In particular, it is possible to provide a sealing structure for an electrical component that can be viewed by exposing the display portion of the display element.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a sealing structure for an electrical component of the present invention.
FIG. 2 is a cross-sectional view of a principal part showing a sealing structure of a conventional electrical component.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting part 2 Switch part 3 Fixed contact 4 1st insulating board 5 Movable contact 6 Spacer member 6a Opening part 7 2nd insulating board 7a Opening part 7b Standing part 8 Space part 9 Electrical component 9a Upper surface part 9b Terminal 10 Crevice 11 Insulating sealing material

Claims

A first insulating substrate having a wiring pattern; an electrical component mounted on the first insulating substrate and connected to the wiring pattern; and a second insulating substrate disposed on the first insulating substrate The second insulating substrate has an opening for passing the electrical component at the top, and is provided with a rising portion formed so as to surround the outer peripheral portion of the electrical component, and the rising portion and the first A sealing part for an electrical component, characterized in that an insulating sealing material is filled in a space composed of one insulating substrate to seal the wiring pattern in the space and the electrically exposed part of the electrical component. Stop structure.

2. The sealing structure for an electrical component according to claim 1, wherein the rising portion is configured by an inclined portion that gradually rises from the root of the rising portion of the second insulating substrate as the electrical component is approached. .

3. The sealing structure for an electrical component according to claim 2, wherein a gap is provided between an edge of the opening and the electrical component.

The first insulating substrate is provided with a fixed contact, and the second insulating substrate is formed of a film-like member provided with a movable contact. When the film-like member is pressed, the film-like member is deformed. 4. A sealing structure for an electrical component according to claim 1, further comprising a switch portion configured to bring the movable contact into contact with the fixed contact.

5. The sealing structure for an electric component according to claim 4, wherein the movable contact and the fixed contact are provided in the vicinity of the rising portion.

The said electrical component is formed with a display element, The upper surface part in which the display part of this display element was provided protruded outward from the said opening part, The Claim 1 characterized by the above-mentioned. Sealing structure for electrical components.