JPH0614479B2 - Electrostatic breakdown prevention structure - Google Patents
Electrostatic breakdown prevention structureInfo
- Publication number
- JPH0614479B2 JPH0614479B2 JP2230240A JP23024090A JPH0614479B2 JP H0614479 B2 JPH0614479 B2 JP H0614479B2 JP 2230240 A JP2230240 A JP 2230240A JP 23024090 A JP23024090 A JP 23024090A JP H0614479 B2 JPH0614479 B2 JP H0614479B2
- Authority
- JP
- Japan
- Prior art keywords
- electrostatic breakdown
- housing
- conductive pattern
- ground plate
- front substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000015556 catabolic process Effects 0.000 title claims description 14
- 230000002265 prevention Effects 0.000 title claims description 6
- 239000000758 substrate Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 description 12
- 230000003068 static effect Effects 0.000 description 12
- 238000005286 illumination Methods 0.000 description 5
- 238000005034 decoration Methods 0.000 description 3
- 241000282412 Homo Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
- H05F3/02—Carrying-off electrostatic charges by means of earthing connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
Landscapes
- Elimination Of Static Electricity (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Telephone Set Structure (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【発明の詳細な説明】 〔概 要〕 接地板による静電破壊防止が不充分な前面基板の部分に
導電パターンを設け、該導電パターンを筺体に電気的に
接続することにより、静電破壊防止構造を完全にする。DETAILED DESCRIPTION [Overview] Preventing electrostatic damage by providing a conductive pattern on a portion of a front substrate where the ground plate does not sufficiently prevent electrostatic damage and electrically connecting the conductive pattern to a housing. Complete the structure.
〔産業上の利用分野〕 本発明は電子機器の静電破壊防止構造に係り、特に前面
飾板の後方に配置された前面基板から内部回路に進入す
る静電気による内部回路の破壊する静電破壊防止構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing electrostatic breakdown of electronic equipment, and more particularly, to prevent electrostatic breakdown in which an internal circuit is destroyed by static electricity that enters an internal circuit from a front substrate arranged behind a front panel. Regarding the structure.
従来より、電子機器にはマイコン等が広く用いられてい
るが、このマイコンやＭＯＳ ＩＣ等は静電気に非常に
弱く、人間がスイッチ等を操作した際に帯電した人体か
らの静電気が内部回路に進入し、マイコン等が破壊され
たりする問題がある。このため、従来の電子機器では、
人体から放電された静電気を内部回路に達する前に接地
してしまう静電破壊防止構造が用いられている。Conventionally, microcomputers and the like have been widely used in electronic devices, but these microcomputers and MOS ICs are extremely vulnerable to static electricity, and static electricity from the human body charged when humans operate switches etc. enters the internal circuit. However, there is a problem that the microcomputer etc. is destroyed. Therefore, in the conventional electronic device,
An electrostatic breakdown prevention structure is used in which static electricity discharged from the human body is grounded before reaching the internal circuit.
第２図は従来の静電破壊防止構造を示す分解斜視図であ
り、本例ではテーププレーヤを例にあげている。１はテ
ープバックの挿入孔６が設けられた前面飾板、３は液晶
表示器等の表示器４、スイッチ、照明ランプ等が配設さ
れ、また導電パターンが設けられた前面基板、２は前面
飾板１と前面基板３の間に配置されたステンレス板等の
金属板で形成された接地板であり、その端部にある接続
部９により図示せぬ接地された筺体と電気的に接続され
ている。また、前面飾板１と接地板２にはスイッチの押
釦等が設けられる孔７、８が設けられている。FIG. 2 is an exploded perspective view showing a conventional electrostatic breakdown preventing structure, and in this example, a tape player is taken as an example. Reference numeral 1 is a front panel provided with an insertion hole 6 for a tape back, 3 is a front panel provided with a display 4, such as a liquid crystal display, switches, illumination lamps, etc., and a conductive pattern is provided, 2 is a front side A ground plate formed of a metal plate such as a stainless plate arranged between the decorative plate 1 and the front substrate 3 and electrically connected to a grounded housing (not shown) by a connecting portion 9 at the end thereof. ing. Further, the front decorative plate 1 and the ground plate 2 are provided with holes 7 and 8 in which push buttons of switches and the like are provided.
次にこの構造の静電破壊防止について説明する。人間の
釦操作等により人体に帯電した静電気が前面から進入し
た場合、その静電気は接地板２が接地された筺体に接続
されているので、前面基板３に進入する前に接地板２か
ら筺体に流れ、前面基板３には到達しない、従って内部
回路には静電気は進入せず、内部回路の静電破壊は防止
される。Next, the electrostatic breakdown prevention of this structure will be described. When static electricity charged on the human body enters from the front by human's button operation, etc., the static electricity is connected to the housing in which the ground plate 2 is grounded. It flows and does not reach the front substrate 3, so that static electricity does not enter the internal circuit and electrostatic breakdown of the internal circuit is prevented.
しかし、接地板２を前面基板３の全面を覆うように配置
できればよいが、前面飾板１の照明等の関係で、接地板
２に前面基板３の全面を覆えない非遮蔽部５ができる場
合がある。この場合、非遮蔽部５から静電気が前面基板
３に進入し、内部回路に達する問題があった。However, it suffices if the ground plate 2 can be arranged so as to cover the entire surface of the front substrate 3, but in the case of the non-shielding portion 5 which cannot cover the entire surface of the front substrate 3 due to the illumination of the front decoration plate 1 There is. In this case, there is a problem that static electricity enters the front substrate 3 from the non-shielding portion 5 and reaches the internal circuit.
本発明はこのような問題を解決するもので、前面飾板
と、前面飾板の後方に位置し電気回路が構成された前面
基板と、前記前面飾板と前記前面基板の間に設けられ接
地された筺体と電気的に接続された接地板とからなる静
電破壊防止構造において、前記前面基板の前面に前記接
地板が存在しない部分に導電パターンを設け、該導電パ
ターンを前記筺体に電気的に接続したことを特徴とする
ものである。The present invention solves such a problem, and includes a front decorative plate, a front substrate located behind the front decorative plate and having an electric circuit, and a ground provided between the front decorative plate and the front substrate. In a structure for preventing electrostatic breakdown composed of a housing and a ground plate electrically connected to the housing, a conductive pattern is provided on the front surface of the front substrate in a portion where the ground plate does not exist, and the conductive pattern is electrically connected to the housing. It is characterized by being connected to.
接地板のない部分から進入してきた静電気は、その部分
に対向した部分に設けられた前面基板の導電パターンを
通り、そして筺体に流れるため、静電気の内部回路への
進入が阻止される。The static electricity that has entered from the portion without the ground plate passes through the conductive pattern of the front substrate provided in the portion facing the portion and then flows into the housing, so that the static electricity is prevented from entering the internal circuit.
以下図面に沿って本発明の実施例を説明する。第１図は
本発明の実施例を示す分解斜視図であり、第３図と同様
の構成には同一の符号を付し、その説明を省略する。前
面基板３には、スイッチ１０や前面飾板１の照明用の照
明ランプ１１が設けられており、その照明ランプ１１の
照明光を前面飾板１に照射させるため接地板２には非遮
蔽部５が形成されている。従って、この非遮蔽部５から
静電気が進入する可能性がある。このため、本実施例で
は、前面基板３の非遮蔽部５に対向する部分に導電パタ
ーン１４を設ける。一方、接地板２に接続突起１６をプ
レス加工等により形成する。そして、前面基板３の導電
パターン１４と接地板２の接続突起１６とを接触させ、
そしてネジ１５により締めつけ、導電パターン１４と接
続突起１６の電気的接続を確実にする。また、接地板２
の接続部９は、前面飾板１の係合凸部１４と筺体１２の
係合孔１３による係合により、前面飾板１と筺体１２に
挟み込まれ、接地板２と筺体１２は電気的に接続され
る。また、筺体１２は図示せぬ電源のアース側に接地さ
れているので、前面基板３の導電パターン１４は接地さ
れた筺体に電気的に接続されることになる。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of the present invention. The same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. The front substrate 3 is provided with a switch 10 and an illumination lamp 11 for illuminating the front decoration plate 1. In order to irradiate the front decoration plate 1 with the illumination light of the illumination lamp 11, the ground plate 2 has a non-shielding portion. 5 is formed. Therefore, static electricity may enter from the non-shielding portion 5. Therefore, in this embodiment, the conductive pattern 14 is provided on the portion of the front substrate 3 that faces the non-shielding portion 5. On the other hand, the connection protrusion 16 is formed on the ground plate 2 by pressing or the like. Then, the conductive pattern 14 of the front substrate 3 and the connection protrusion 16 of the ground plate 2 are brought into contact with each other,
Then, it is tightened with the screw 15 to ensure the electrical connection between the conductive pattern 14 and the connection protrusion 16. Also, the ground plate 2
The connecting portion 9 is sandwiched between the front decorative board 1 and the housing 12 by the engagement convex portion 14 of the front decorative board 1 and the engagement hole 13 of the housing 12, and the ground plate 2 and the housing 12 are electrically connected. Connected. Moreover, since the housing 12 is grounded to the ground side of the power source (not shown), the conductive pattern 14 of the front substrate 3 is electrically connected to the grounded housing.
従って、本実施例の構造によれば、接地板２の非遮蔽部
５から進入した静電気は、導電パターン１４を通って、
接地板２に流れ、そして筺体１２を介して電源のアース
側に流れることになり、電気機器の内部回路への進入が
防止され、マイコン等の静電破壊が効果的に防止され
る。Therefore, according to the structure of this embodiment, the static electricity that has entered from the non-shielding portion 5 of the ground plate 2 passes through the conductive pattern 14,
The current flows to the ground plate 2 and then to the ground side of the power source through the housing 12, so that it is prevented from entering the internal circuit of the electric device and the electrostatic breakdown of the microcomputer or the like is effectively prevented.
尚、本実施例では導電パターン１４を接地板２を介して
筺体１２に電気的に接続するようにしたが、筺体１２に
接続突起を設けて、導電パターン１４を直接、筺体１２
に電気的に接続するようにしてもよい。In the present embodiment, the conductive pattern 14 is electrically connected to the housing 12 via the ground plate 2, but the housing 12 is provided with a connection protrusion to directly connect the conductive pattern 14 to the housing 12.
May be electrically connected to.
以上詳細に説明したように、本発明によれば、接地板に
よる静電破壊防止が不充分な前面基板の部分に導電パタ
ーンを設け、該導電パターンを筺体に電気的に接続する
ようにしたので、接地板による静電破壊防止が不充分な
部分の静電破壊防止構造を充分に行うことができる。As described in detail above, according to the present invention, the conductive pattern is provided on the portion of the front substrate where the electrostatic damage prevention by the ground plate is insufficient, and the conductive pattern is electrically connected to the housing. , It is possible to sufficiently implement the electrostatic breakdown preventing structure of the portion where the electrostatic breakdown prevention by the ground plate is insufficient.
第１図は本発明の実施例を示す分解斜視図、第２図は従
来の静電破壊防止構造示す分解斜視図である。 図中、１は前面飾板、２は接地板、３は前面基板、１２
は筺体、１４は導電パターン、１５はネジ、１６は接続
突起である。FIG. 1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a conventional electrostatic breakdown preventing structure. In the figure, 1 is a front decorative plate, 2 is a ground plate, 3 is a front substrate, 12
Is a housing, 14 is a conductive pattern, 15 is a screw, and 16 is a connection protrusion.
Claims (1)
回路が構成された前面基板と、前記前面飾板と前記前面
基板の間に設けられ接地された筺体と電気的に接続され
た接地板とからなる静電破壊防止構造において、 前記前面基板の前面に前記接地板が存在しない部分に導
電パターンを設け、 該導電パターンを前記筺体に電気的に接続したことを特
徴とする静電気破壊防止構造。1. A front decorative plate, a front substrate located behind the front decorative plate and configured with an electric circuit, and electrically connected to a grounded housing provided between the front decorative plate and the front substrate. In the structure for preventing electrostatic breakdown including a ground plate, a conductive pattern is provided on the front surface of the front substrate in a portion where the ground plate does not exist, and the conductive pattern is electrically connected to the housing. Electrostatic breakdown prevention structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230240A JPH0614479B2 (en) | 1990-08-31 | 1990-08-31 | Electrostatic breakdown prevention structure |
| KR1019910011942A KR960005053B1 (en) | 1990-08-31 | 1991-07-13 | Static electricity breakdown prevention frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230240A JPH0614479B2 (en) | 1990-08-31 | 1990-08-31 | Electrostatic breakdown prevention structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04112495A JPH04112495A (en) | 1992-04-14 |
| JPH0614479B2 true JPH0614479B2 (en) | 1994-02-23 |
Family
ID=16904725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2230240A Expired - Lifetime JPH0614479B2 (en) | 1990-08-31 | 1990-08-31 | Electrostatic breakdown prevention structure |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0614479B2 (en) |
| KR (1) | KR960005053B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2586768Y2 (en) * | 1992-05-15 | 1998-12-09 | オタリ株式会社 | Tape running device |
| JP4362337B2 (en) | 2003-09-10 | 2009-11-11 | パナソニック株式会社 | Infrared light bulb, heating device and electronic device |
-
1990
- 1990-08-31 JP JP2230240A patent/JPH0614479B2/en not_active Expired - Lifetime
-
1991
- 1991-07-13 KR KR1019910011942A patent/KR960005053B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR960005053B1 (en) | 1996-04-18 |
| KR920005678A (en) | 1992-03-28 |
| JPH04112495A (en) | 1992-04-14 |
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