JPH02139497U - - Google Patents
Info
- Publication number
- JPH02139497U JPH02139497U JP1989049172U JP4917289U JPH02139497U JP H02139497 U JPH02139497 U JP H02139497U JP 1989049172 U JP1989049172 U JP 1989049172U JP 4917289 U JP4917289 U JP 4917289U JP H02139497 U JPH02139497 U JP H02139497U
- Authority
- JP
- Japan
- Prior art keywords
- temperature detection
- detection means
- voice coil
- comparing
- reference signal
- 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
- 238000001514 detection method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Control Of Linear Motors (AREA)
Description
第１図ないし第３図は本考案の第１実施例に係
り、第１図は第１実施例の構成を示す回路図、第
２図はサーミスタを取付けたボビンを示す斜視図
、第３図は第２図のコイルを除去したボビンを示
す平面図、第４図は本考案の第２実施例の一部を
示す回路図、第５図は従来例を示す回路図である
。
１，２，２９…比較器、５，６，７，８，９，
１０，３４…トランジスタ、１１…コイル、２１
…ＶＣＭの駆動回路、２２…スイツチ、２３…リ
レー、２７…サーミスタ、２８…ＯＰアンプ、３
１…フリツプフロツプ、３６…ボビン。
1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a circuit diagram showing the configuration of the first embodiment, FIG. 2 is a perspective view showing a bobbin with a thermistor attached, and FIG. 3 2 is a plan view showing the bobbin with the coil removed, FIG. 4 is a circuit diagram showing a part of the second embodiment of the present invention, and FIG. 5 is a circuit diagram showing a conventional example. 1, 2, 29... Comparator, 5, 6, 7, 8, 9,
10, 34...Transistor, 11...Coil, 21
...VCM drive circuit, 22...Switch, 23...Relay, 27...Thermistor, 28...OP amplifier, 3
1...flip-flop, 36...bobbin.
Claims (1)
スコイルの近傍に配設した温度検出手段と、該温
度検出手段の出力と基準信号とを比較する比較手
段と、該比較手段の出力により、前記ボイスコイ
ルへの駆動電流の開閉を制御する開閉制御手段と
を設けたことを特徴とするボイスコイルモータの
駆動回路。 In a drive circuit for a voice coil motor, a temperature detection means disposed near the voice coil, a comparison means for comparing the output of the temperature detection means with a reference signal, and a temperature detection means for comparing the output of the temperature detection means with a reference signal; 1. A drive circuit for a voice coil motor, comprising an opening/closing control means for controlling opening/closing of a drive current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989049172U JPH02139497U (en) | 1989-04-25 | 1989-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989049172U JPH02139497U (en) | 1989-04-25 | 1989-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02139497U true JPH02139497U (en) | 1990-11-21 |
Family
ID=31566635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989049172U Pending JPH02139497U (en) | 1989-04-25 | 1989-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02139497U (en) |
-
1989
- 1989-04-25 JP JP1989049172U patent/JPH02139497U/ja active Pending