JP2008053153A - Switch contact structure - Google Patents

Switch contact structure Download PDF

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JP2008053153A
JP2008053153A JP2006230778A JP2006230778A JP2008053153A JP 2008053153 A JP2008053153 A JP 2008053153A JP 2006230778 A JP2006230778 A JP 2006230778A JP 2006230778 A JP2006230778 A JP 2006230778A JP 2008053153 A JP2008053153 A JP 2008053153A
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contact
fixed
movable
switch
fixed contact
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Hiroshi Aoki
洋 青木
Yasumasa Serizawa
安政 芹沢
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Valeo Japan Co Ltd
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Niles Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch contact structure in which abrasion of a fixed point due to a shift can be prevented even in case of a large current motor driving circuit or the like. <P>SOLUTION: In a switch provided with each of fixed contact points 3, 5, 7, 9 on a plus side and a minus side which are pattern-formed on a printed circuit board 1 and movable contact points 11, 13 of which the contact parts 15, 17, 19, 21 corresponding to each of the fixed contact points 3, 5, 7, 9 respectively shift to be connected electrically with each of the fixed contact points 3, 5, 7, 9, the fixed contact point 3 on the plus side and the corresponding contact part 15 are made to contact with each other earlier than the fixed contact point 9 on the minus side and the corresponding contact part 21 are made to contact with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車のコンビネーション・スイッチで操作するワイパー・ウオッシャーのモーター駆動回路等に適用するスイッチの接点構造に関する。   The present invention relates to a contact structure of a switch applied to a motor drive circuit of a wiper washer operated by a combination switch of an automobile.

従来のこの種のスイッチの接点構造としては、例えば図４に示すものがある。図４は、電動モータを駆動するためのモーター駆動回路を構成する固定接点及び可動接点の概略平面図である。   An example of a conventional contact structure of this type of switch is shown in FIG. FIG. 4 is a schematic plan view of a fixed contact and a movable contact constituting a motor drive circuit for driving the electric motor.

図４のように、モーター駆動回路は、プリント回路基板上にプラス側及びマイナス側の各固定接点１０１，１０３，１０５，１０７がプリントにより薄くパターン形成されている。各固定接点１０１，１０３，１０５，１０７に対して可動接点１０９，１１１の対応する各接点部１１３，１１５，１１７，１１９（通常上記パターンよりも厚みが厚い）が摺動により乗り上げ接触可能に配置されている。各固定接点１０１，１０３，１０５，１０７は、電動モータ１２１に対して回路構成されている。これら各固定接点１０１，１０３，１０５，１０７及び可動接点１０９，１１１は、例えばステアリング・コラムのコンビネーション・スイッチに設けられている。   As shown in FIG. 4, in the motor drive circuit, positive and negative fixed contacts 101, 103, 105, and 107 are thinly formed by printing on a printed circuit board. The respective contact portions 113, 115, 117, 119 (thickly thicker than the above pattern) corresponding to the movable contacts 109, 111 are arranged so as to be able to climb on and come into contact with the fixed contacts 101, 103, 105, 107 by sliding. Has been. Each of the fixed contacts 101, 103, 105, 107 has a circuit configuration with respect to the electric motor 121. These fixed contacts 101, 103, 105, 107 and movable contacts 109, 111 are provided, for example, in a steering column combination switch.

従って、コンビネーション・スイッチの操作により可動接点１０９，１１１が移動すると各接点部１１３，１１５，１１７，１１９がプリント回路基板上を
摺動し、固定接点１０１，１０３，１０５，１０７に対して乗り上げ接触する。各接点部１１３，１１５，１１７，１１９が対応する固定接点１０１，１０３，１０５，１０７に接触するとモーター駆動回路が閉じられ、電動モータ１２１が回転駆動される。 Therefore, when the movable contacts 109 and 111 are moved by the operation of the combination switch, the contact portions 113, 115, 117, and 119 slide on the printed circuit board and come into contact with the fixed contacts 101, 103, 105, and 107. To do. When each contact part 113, 115, 117, 119 comes into contact with the corresponding fixed contact 101, 103, 105, 107, the motor drive circuit is closed and the electric motor 121 is driven to rotate.

しかし、上記の構造では、各接点部１１３，１１５，１１７，１１９が各固定接点１０１，１０３，１０５，１０７に接触し始める接触開始位置が一直線状に並ぶように設定されているため、製造誤差などにより各固定接点１０１，１０３，１０５，１０７の接触開始位置にばらつきがあると、金属の転移による不具合を招く恐れがある。   However, in the above structure, since the contact start positions at which the contact portions 113, 115, 117, 119 start to contact the fixed contacts 101, 103, 105, 107 are set so as to be aligned, manufacturing errors If the contact start position of each of the fixed contacts 101, 103, 105, 107 varies due to the above, there is a risk of inconvenience due to metal transfer.

すなわち、前記接触開始位置のばらつきがあると、各接点部１１３，１１５，１１７，１１９の各固定接点１０１，１０３，１０５，１０７に対する接触開始のタイミングがずれ、各接点部１１３，１１５，１１７，１１９及び各固定接点１０１，１０３，１０５，１０７間の金属の転移の仕方が安定しなくなる。   That is, if there is variation in the contact start position, the contact start timing of each contact portion 113, 115, 117, 119 with respect to each fixed contact 101, 103, 105, 107 is shifted, and each contact portion 113, 115, 117, 119 and the way of metal transfer between the fixed contacts 101, 103, 105, 107 become unstable.

ここで、転移とは、大電流のモータ駆動回路等において、接点の切り替えを行う際にアークが発生して熱を持つため、プラス側の金属が溶けてマイナス側の金属に付着する現象である。   Here, transition is a phenomenon in which an arc is generated and heat is generated when switching contacts in a high-current motor drive circuit or the like, so that the plus side metal melts and adheres to the minus side metal. .

この転移がプラス側となる固定接点１０１とマイナス側となる接点部１１３間で起こると、固定接点１０１の金属が溶けて接点部１１３に付着し、剥げてしまうという問題がある。   When this transition occurs between the fixed contact 101 on the plus side and the contact portion 113 on the minus side, there is a problem that the metal of the fixed contact 101 melts and adheres to the contact portion 113 and peels off.

図５は、各固定接点１０１，１０３，１０５，１０７の接触開始位置のばらつきを誇張して示したものであり、（ａ）は、一部が接触開始した状態の固定接点及び可動接点の概略平面図、（ｂ）は、その他が接触開始した状態の固定接点及び可動接点の概略平面図である。   FIG. 5 shows exaggerated variations in the contact start position of each of the fixed contacts 101, 103, 105, and 107. FIG. 5A is a schematic diagram of the fixed contact and the movable contact in a state where a part of the contact starts. A top view and (b) are schematic plan views of a fixed contact and a movable contact in a state in which contact with others has started.

図５（ａ）のように固定接点１０１，１０３，１０５，１０７の接触開始位置にばらつきがあると、マイナス側の固定接点１０７に可動接点１１１の接点部１１９が最初に接触を開始する。この接触により可動接点１１１がマイナスの電気を帯びる。この状態で可動接点１０９，１１１がさらに移動し、図５（ｂ）のように接点部１１７が固定接点１０５に乗り上げると、可動接点１１１がマイナスの電気を帯びているため固定接点１０５，１０３を通じて他方の可動接点１０９もマイナスの電気を帯びる。   If the contact start positions of the fixed contacts 101, 103, 105, 107 vary as shown in FIG. 5A, the contact portion 119 of the movable contact 111 starts to contact the negative fixed contact 107 first. Due to this contact, the movable contact 111 is negatively charged. In this state, the movable contacts 109 and 111 further move, and when the contact portion 117 rides on the fixed contact 105 as shown in FIG. 5B, the movable contact 111 is negatively charged. The other movable contact 109 is negatively charged.

このため、可動接点１０９の接点部１１３が固定接点１０１に乗り上げるときは、プラス側の固定接点１０１とマイナスの電気を帯びている接点部１１３間の転移により、固定接点１０１の金属が剥げて接点部１１３に付着することになる。   For this reason, when the contact portion 113 of the movable contact 109 rides on the fixed contact 101, the metal of the fixed contact 101 peels off due to the transition between the positive-side fixed contact 101 and the negatively charged contact portion 113. It will adhere to the portion 113.

従って、プリントによりパターン形成された固定接点１０１は、厚みが薄く摩耗が進行し、スイッチの耐久性が損なわれるという問題がある。   Therefore, the fixed contact 101 patterned by printing has a problem that the thickness is thin and wear proceeds, and the durability of the switch is impaired.

特開２０００−１１３７７６号JP 2000-113776 A

解決しようとする問題点は、大電流のモータ駆動回路等において、接点の切り替えを行う際の転移により固定接点の摩耗が進行し、スイッチの耐久性が損なわれるという点である。   The problem to be solved is that, in a high-current motor drive circuit or the like, the wear of the fixed contact progresses due to the transition when the contact is switched, and the durability of the switch is impaired.

本発明は、大電流のモータ駆動回路等でも転移による固定接点の摩耗を抑制可能とするため、プリント回路基板にパターン形成されたプラス側及びマイナス側の各固定接点と、前記各固定接点に対して対応する各接点部が接触移動し各固定接点間を導通接続する可動接点とを備えたスイッチにおいて、前記プラス側の固定接点及び前記対応する接点部がマイナス側の固定接点及び前記対応する接点部よりも先に接触するように形成したことを最も主要な特徴とする。   In the present invention, in order to suppress wear of the fixed contact due to transfer even in a motor driving circuit having a large current, the positive and negative fixed contacts patterned on the printed circuit board, and the fixed contacts Each of the contact portions corresponding to each other, and a movable contact that electrically connects the fixed contacts, and the positive fixed contact and the corresponding contact portion are the negative fixed contact and the corresponding contact. The main feature is that it is formed so as to come into contact before the portion.

本発明のスイッチの接点構造は、プリント回路基板にパターン形成されたプラス側及びマイナス側の各固定接点と、前記各固定接点に対して対応する各接点部が接触移動し各固定接点間を導通接続する可動接点とを備えたスイッチにおいて、前記プラス側の固定接点及び前記対応する接点部がマイナス側の固定接点及び前記対応する接点部よりも先に接触するように形成したため、マイナス側の固定接点に対応する接点部が、固定接点に乗り上げるときプラスの電気を帯びており、マイナス側の固定接点及び対応する接点部が接触するときに転移があってもプラスの電気を帯びた厚みの厚い接点部の金属がマイナス側の固定接点の金属に転移することになり、転移による固定接点の摩耗を抑制することができる。   The contact structure of the switch according to the present invention is such that the positive and negative fixed contacts patterned on the printed circuit board and the corresponding contact portions move and move between the fixed contacts. In the switch including the movable contact to be connected, the positive fixed contact and the corresponding contact portion are formed so as to come in contact with the negative fixed contact and the corresponding contact portion before the negative fixed contact. The contact part corresponding to the contact is positively charged when riding on the fixed contact, and even if there is a transition when the fixed contact on the negative side and the corresponding contact part are in contact with each other, it is thick. The metal of the contact portion is transferred to the metal of the negative fixed contact, and the wear of the fixed contact due to the transfer can be suppressed.

大電流のモータ駆動回路等でも転移による固定接点の摩耗を抑制可能とするという目的を、固定接点に対する可動接点の接触の先後を設定することで実現した。   The purpose of making it possible to suppress wear of the stationary contact due to transfer even in a high-current motor drive circuit, etc. was realized by setting the front and back of the contact of the movable contact with the stationary contact.

［スイッチの接点構造］
図１は、本発明の実施例１を適用したモーター駆動回路を構成する固定接点及び可動接点の斜視図、図２は、接続状態を示す図表である。 [Switch contact structure]
FIG. 1 is a perspective view of a fixed contact and a movable contact constituting a motor drive circuit to which a first embodiment of the present invention is applied, and FIG. 2 is a chart showing a connection state.

図１のスイッチは、例えば、自動車のコンビネーション・スイッチで操作するワイパー・ウオッシャーのモーター駆動回路に適用するスイッチの接点構造であり、モーター駆動回路は、プリント回路基板１上にプラス側及びマイナス側の各固定接点３，５，７，９がプリントにより薄くパターン形成されている。
固定接点３，５，７，９の導通により後述する電動モータが例えば正転駆動する。 The switch of FIG. 1 is a contact structure of a switch applied to, for example, a motor drive circuit of a wiper washer operated by a combination switch of an automobile. The motor drive circuit is provided on the printed circuit board 1 on the plus side and the minus side. Each fixed contact 3, 5, 7, 9 is thinly patterned by printing.
An electric motor, which will be described later, is driven forward by, for example, the conduction of the fixed contacts 3, 5, 7, 9.

前記固定接点３，５，７，９に対して可動接点１１，１３が配置されている。可動接点１１，１３には、上記パターンよりも厚みが厚い接点部１５，１７，１９，２１が設けられている。可動接点１１，１３は、プリント回路基板１上を摺動して接触移動し、接点部１５，１７，１９，２１が対応する各固定接点３，５，７，９に乗り上げ接触し、図２のように導通接続する。   Movable contacts 11, 13 are arranged with respect to the fixed contacts 3, 5, 7, 9. The movable contacts 11 and 13 are provided with contact portions 15, 17, 19, and 21 that are thicker than the above pattern. The movable contacts 11 and 13 slide on the printed circuit board 1 and move in contact with each other, and the contact portions 15, 17, 19 and 21 ride on the corresponding fixed contacts 3, 5, 7 and 9. Conductive connection as shown.

［導通作用］
コンビネーション・スイッチの操作により可動接点１１，１３が移動し、接点部１５，１７，１９，２１が対応する固定接点３，５，７，９に接触すると、図２のように、プラス側の固定接点３、可動接点１１、固定接点５、電動モータ２３、固定接点７、可動接点１３、固定接点９の順に電流が流れ、電動モータ２３が駆動される。 [Conductive action]
When the movable contacts 11 and 13 are moved by the operation of the combination switch and the contact portions 15, 17, 19, and 21 come into contact with the corresponding fixed contacts 3, 5, 7, and 9, as shown in FIG. A current flows in the order of the contact 3, the movable contact 11, the fixed contact 5, the electric motor 23, the fixed contact 7, the movable contact 13, and the fixed contact 9, and the electric motor 23 is driven.

図３は、各固定接点３，５，７，９と可動接点１１，１３との接触動作の状態を示し、（ａ）は、一部が接触開始した状態の固定接点及び可動接点の概略平面図、（ｂ）は、その他が接触開始した状態の固定接点及び可動接点の概略平面図である。
可動接点１１，１３が移動すると、図３（ａ）のように、最初にプラス側の固定接点３に可動接点１１の接点部１５が乗り上げて接触を開始する。この接触により可動接点１１がプラスの電気を帯びる。可動接点１１，１３がさらに移動し、図３（ｂ）のように接点部１７が、固定接点５に乗り上げると可動接点１１がプラスの電気を帯びているため固定接点５，７を通じて他方の可動接点１３もプラスの電気を帯びる。 FIG. 3 shows the state of contact operation between the fixed contacts 3, 5, 7, and 9 and the movable contacts 11 and 13, and (a) is a schematic plan view of the fixed contact and the movable contact in a state where contact is partially started. FIG. 4B is a schematic plan view of a fixed contact and a movable contact in a state in which contact with others has started.
When the movable contacts 11 and 13 move, the contact portion 15 of the movable contact 11 first rides on the positive fixed contact 3 and starts contact as shown in FIG. By this contact, the movable contact 11 is charged with positive electricity. When the movable contacts 11 and 13 further move and the contact portion 17 rides on the fixed contact 5 as shown in FIG. 3B, the movable contact 11 is positively charged. The contact 13 is also positively charged.

このため、可動接点１３の接点部２１が固定接点９に乗り上げるときは、マイナス側の固定接点９とプラスの電気を帯びている接点部２１間の転移により、厚みの厚い接点部２１の金属が剥げて固定接点９に付着することになる。   For this reason, when the contact portion 21 of the movable contact 13 rides on the fixed contact 9, the metal of the thick contact portion 21 is caused by the transition between the negative fixed contact 9 and the positively charged contact portion 21. It peels off and adheres to the fixed contact 9.

従って、転移による固定接点９の摩耗を抑制し、円滑な接続を長く維持することができる。   Therefore, wear of the fixed contact 9 due to transfer can be suppressed, and a smooth connection can be maintained for a long time.

［実施例１の効果］
本発明実施例１のスイッチの接点構造は、プリント回路基板１にパターン形成されたプラス側及びマイナス側の各固定接点３，５，７，９と、前記各固定接点３，５，７，９に対応する各接点部１５，１７，１９，２１が接触移動し各固定接点３，５，７，９間を導通接続する可動接点１１，１３とを備えたスイッチにおいて、前記プラス側の固定接点３及び前記対応する接点部１５がマイナス側の固定接点９及び前記対応する接点部２１よりも先に接触するように形成したため、マイナス側の固定接点９に対応する接点部２１が、固定接点９に乗り上げるときプラスの電気を帯びており、マイナス側の固定接点９及び対応する接点部２１が接触するときに転移があってもプラスの電気を帯びた厚みの厚い接点部２１の金属がマイナス側の固定接点９の金属に転移することになり、厚みの薄い固定接点９の転移による摩耗を抑制することができる。
前記各接点部１５，１７，１９，２１は、前記プリント回路基板１上を摺動して各固定接点３，５，７，９に対し接触移動し、前記プラス側の固定接点３の接触開始位置が、前記マイナス側の固定接点９の接触開始位置よりも前記接点部１５，２１に対して相対的に近くなるように形成されたため、厚みの薄い固定接点９の転移による摩耗を確実に抑制することができる。 [Effect of Example 1]
The switch contact structure according to the first embodiment of the present invention includes positive and negative fixed contacts 3, 5, 7, and 9 patterned on the printed circuit board 1, and the fixed contacts 3, 5, 7, and 9 described above. In the switch provided with the movable contacts 11 and 13 in which the contact portions 15, 17, 19, and 21 corresponding to each of the contact portions move and are electrically connected between the fixed contacts 3, 5, 7, and 9, the positive fixed contact 3 and the corresponding contact portion 15 are formed so as to come into contact with the minus side fixed contact 9 and the corresponding contact portion 21 before the contact portion 21 corresponding to the minus side fixed contact 9 is fixed to the fixed contact 9. The metal of the thick contact portion 21 that is positively charged is negative on the negative side even if there is a transition when the fixed contact 9 on the negative side and the corresponding contact portion 21 come into contact with each other. Solid Will be transferred to the metal of the contacts 9, it is possible to suppress the abrasion by thin transition of the fixed contact 9 thick.
The contact portions 15, 17, 19, 21 slide on the printed circuit board 1 and move in contact with the fixed contacts 3, 5, 7, 9, and contact with the positive fixed contact 3 starts. Since the position is formed so as to be relatively closer to the contact portions 15 and 21 than the contact start position of the fixed contact 9 on the negative side, wear due to the transfer of the thin fixed contact 9 is surely suppressed. can do.

前記固定接点３，５，７，９及び可動接点１１，１３は、電動モータ２３を駆動するためのモーター駆動回路を構成するため、大電流が流れるモーター駆動回路において、厚みの薄い固定接点９の転移による摩耗を確実に抑制することができる。   The fixed contacts 3, 5, 7, 9 and the movable contacts 11, 13 constitute a motor drive circuit for driving the electric motor 23. Therefore, in the motor drive circuit through which a large current flows, Wear due to transfer can be reliably suppressed.

モーター駆動回路を構成する固定接点及び可動接点の斜視図である（実施例１）。(Example 1) which is a perspective view of the stationary contact and movable contact which comprise a motor drive circuit. 接続状態を示す図表である（実施例１）。It is a chart which shows a connection state (Example 1). （ａ）は、一部が接触開始した状態の固定接点及び可動接点の概略平面図、（ｂ）は、全てが接触開始した状態の固定接点及び可動接点の概略平面図である（実施例１）。(A) is a schematic plan view of a fixed contact and a movable contact in a state where part of the contact starts, and (b) is a schematic plan view of a fixed contact and a movable contact in a state where all of them start contact (Example 1). ). 電動モータを駆動するためのモーター駆動回路を構成する固定接点及び可動接点の概略平面図である（従来例）。It is a schematic plan view of a fixed contact and a movable contact constituting a motor drive circuit for driving an electric motor (conventional example). （ａ）は、一部が接触開始した状態の固定接点及び可動接点の概略平面図、（ｂ）は、その他が接触開始した状態の固定接点及び可動接点の概略平面図である（従来例）。(A) is a schematic plan view of a fixed contact and a movable contact in a state where part of the contact starts, and (b) is a schematic plan view of a fixed contact and a movable contact in a state where others start to contact (conventional example). .

符号の説明Explanation of symbols

１ プリント回路基板
３，５，７，９ 固定接点
１１，１３ 可動接点
１５，１７，１９，２１ 接点部
２３ 電動モータ
DESCRIPTION OF SYMBOLS 1 Printed circuit board 3, 5, 7, 9 Fixed contact 11, 13 Movable contact 15, 17, 19, 21 Contact part 23 Electric motor

Claims (3)

プリント回路基板にパターン形成されたプラス側及びマイナス側の各固定接点と、
前記各固定接点に対応する各接点部が接触移動し各固定接点間を導通接続する可動接点とを備えたスイッチにおいて、
前記プラス側の固定接点及び前記対応する接点部がマイナス側の固定接点及び前記対応する接点部よりも先に接触するように形成した
ことを特徴とするスイッチの接点構造。 Each of the positive and negative fixed contacts patterned on the printed circuit board,
In a switch provided with a movable contact that each contact portion corresponding to each fixed contact is moved in contact and electrically connected between each fixed contact,
The contact structure of the switch, wherein the positive fixed contact and the corresponding contact portion are formed so as to come in contact with the negative fixed contact and the corresponding contact portion. 請求項１記載のスイッチの接点構造であって、
前記各接点部は、前記プリント回路基板上を摺動して各固定接点に対し乗り上げ接触可能であり、
前記プラス側の固定接点の接触開始位置が、前記マイナス側の固定接点の接触開始位置よりも前記対応する接点部に対して相対的に近くなるように形成された
ことを特徴とするスイッチの接点構造。 A switch contact structure according to claim 1,
Each of the contact portions can slide on the printed circuit board and come into contact with each fixed contact,
The contact point of the switch is formed such that the contact start position of the positive fixed contact is relatively closer to the corresponding contact portion than the contact start position of the negative fixed contact. Construction. 請求項１又は２記載のスイッチの接点構造であって、
前記固定接点及び可動接点は、電動モータを駆動するためのモーター駆動回路を構成する
ことを特徴とするスイッチの接点構造。
A switch contact structure according to claim 1 or 2,
The contact structure of a switch, wherein the fixed contact and the movable contact constitute a motor drive circuit for driving an electric motor.
JP2006230778A 2006-08-28 2006-08-28 Switch contact structure Pending JP2008053153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006230778A JP2008053153A (en) 2006-08-28 2006-08-28 Switch contact structure

Publications (1)

Publication Number Publication Date
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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006230778A Pending JP2008053153A (en) 2006-08-28 2006-08-28 Switch contact structure

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014182956A (en) * 2013-03-19 2014-09-29 Omron Corp Switch
WO2018123224A1 (en) * 2016-12-27 2018-07-05 オムロン株式会社 Switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035426A (en) * 1983-05-16 1985-02-23 ケイビー　デンバー，インコーポレーテツド Keyboard assembly
JPH0547254A (en) * 1991-08-12 1993-02-26 Nippondenso Co Ltd Contact for switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035426A (en) * 1983-05-16 1985-02-23 ケイビー　デンバー，インコーポレーテツド Keyboard assembly
JPH0547254A (en) * 1991-08-12 1993-02-26 Nippondenso Co Ltd Contact for switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014182956A (en) * 2013-03-19 2014-09-29 Omron Corp Switch
WO2018123224A1 (en) * 2016-12-27 2018-07-05 オムロン株式会社 Switch

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