JPS6146708U - Camera electromagnet drive device - Google Patents
Camera electromagnet drive deviceInfo
- Publication number
- JPS6146708U JPS6146708U JP13222084U JP13222084U JPS6146708U JP S6146708 U JPS6146708 U JP S6146708U JP 13222084 U JP13222084 U JP 13222084U JP 13222084 U JP13222084 U JP 13222084U JP S6146708 U JPS6146708 U JP S6146708U
- Authority
- JP
- Japan
- Prior art keywords
- drive device
- current
- electromagnet drive
- predetermined
- switching element
- 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.)
- Pending
Links
Landscapes
- Cameras In General (AREA)
- Diaphragms For Cameras (AREA)
- Shutters For Cameras (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係る電磁石の概略構成図、第２図は第
１図示電磁石の為の駆動解路図、第３図は第１、第２図
示電磁石のコイルに流れる電流の特性図、第４図は従来
の電磁石のコイルに流れる電流の特性図である。
図においてＲ１．Ｒ２・・・・・・抵抗、Ｔｒ１，Ｔｒ
２・・・・・・トランシスタ、８・・・・・・比較回路
である。FIG. 1 is a schematic configuration diagram of an electromagnet according to the present invention, FIG. 2 is a driving solution diagram for the first illustrated electromagnet, and FIG. 3 is a characteristic diagram of the current flowing in the coils of the first and second illustrated electromagnets. FIG. 4 is a characteristic diagram of the current flowing through the coil of a conventional electromagnet. In the figure, R1. R2...Resistance, Tr1, Tr
2...transistor, 8...comparison circuit.
Claims (2)
励磁電流が供給された時に前記鉄片を所定位置から離反
させる磁力を発生する低抵抗コイルと、前記励磁電流が
所定電流値に達する迄前記コイルに大励磁電流を供給し
、前記所定電流値到達後に前記励磁電流を所定値に制限
する電流制御手段とを具備することを特徴とする電磁石
の駆動装置。(1) A movable iron piece, a permanent magnet that attracts and holds the iron piece,
a low-resistance coil that generates a magnetic force that separates the iron piece from a predetermined position when an excitation current is supplied; a large excitation current is supplied to the coil until the excitation current reaches a predetermined current value; and after reaching the predetermined current value; An electromagnet drive device comprising: current control means for limiting the excitation current to a predetermined value.
ンジスタからなる第１直列回路と、低抵抗素子とスイッ
チング素子からなり前記第１直列回路に並列接続さたれ
た第２直列回路と、前記低抵抗素子の出力端電圧を検出
し、該電圧が前記所定電流値に到達するまで前記スイッ
チング素子を作動状態とする比較回路とを具備する二と
を特徴とする実用新案登録請求の範囲第（１）項記載の
電磁石の駆動装置。 ｛３｝ 前記スイッチング素子はトランジスタで形成
されることを特徴とする実用新案登録請求の範囲第（２
）項記載の電磁石の駆動装置。(2) The current control means includes a first series circuit including a current limiting resistor and a driving transistor, a second series circuit including a low resistance element and a switching element, and connected in parallel to the first series circuit; and a comparison circuit that detects the output terminal voltage of the low resistance element and keeps the switching element in an operating state until the voltage reaches the predetermined current value. 1) The electromagnet drive device described in item 1). {3} Utility model registration claim No. 2, characterized in that the switching element is formed of a transistor.
) The electromagnet drive device described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13222084U JPS6146708U (en) | 1984-08-30 | 1984-08-30 | Camera electromagnet drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13222084U JPS6146708U (en) | 1984-08-30 | 1984-08-30 | Camera electromagnet drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146708U true JPS6146708U (en) | 1986-03-28 |
Family
ID=30690784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13222084U Pending JPS6146708U (en) | 1984-08-30 | 1984-08-30 | Camera electromagnet drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146708U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121890A1 (en) * | 2004-06-14 | 2005-12-22 | Rohm Co., Ltd. | Actuator drive circuit for shutter and actuator for shutter |
-
1984
- 1984-08-30 JP JP13222084U patent/JPS6146708U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121890A1 (en) * | 2004-06-14 | 2005-12-22 | Rohm Co., Ltd. | Actuator drive circuit for shutter and actuator for shutter |
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