JPH0159211U - - Google Patents
Info
- Publication number
- JPH0159211U JPH0159211U JP15572087U JP15572087U JPH0159211U JP H0159211 U JPH0159211 U JP H0159211U JP 15572087 U JP15572087 U JP 15572087U JP 15572087 U JP15572087 U JP 15572087U JP H0159211 U JPH0159211 U JP H0159211U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- driving
- circuit
- brushless motor
- drive source
- 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
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000011514 reflex Effects 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第１図は本考案によるレンズ駆動装置を有する
１眼レフ用交換レンズの縦断面図、第２図は第１
図中のレンズ駆動用ブラシレスモータの分解斜視
図、第３図は本考案の一実施例に係るレンズ駆動
装置の制御系のブロツク図、第４図は第３図中の
波形合成回路の回路図、第５図は第３図中のパル
ス回路の回路図、第６図〜第８図は第３図の制御
系の回路動作を示すグラフ、第９図は第３図中の
波形合成回路の他の構成を示す回路図、第１０図
は波形合成回路のさらに別の構成を示す回路図で
ある。
２……ブラシレスモータ、３……ロータ、Ｌ１
，Ｌ２，Ｌ３……レンズ、７ａ，７ｂ……回転位
置検出器、２３ａ〜２３ｄ……パルス回路、２６
……制御回路。
FIG. 1 is a vertical cross-sectional view of an interchangeable lens for a single-lens reflex camera having a lens drive device according to the present invention, and FIG.
3 is a block diagram of a control system of a lens driving device according to an embodiment of the present invention, and FIG. 4 is a circuit diagram of a waveform synthesis circuit shown in FIG. 3. , Figure 5 is a circuit diagram of the pulse circuit in Figure 3, Figures 6 to 8 are graphs showing the circuit operation of the control system in Figure 3, and Figure 9 is a diagram of the waveform synthesis circuit in Figure 3. Circuit Diagram Showing Other Configurations FIG. 10 is a circuit diagram showing still another configuration of the waveform synthesis circuit. 2... Brushless motor, 3... Rotor, L1
, L2, L3...Lens, 7a, 7b...Rotational position detector, 23a-23d...Pulse circuit, 26
...control circuit.
Claims (1)
該駆動源の駆動力によりレンズを光軸方向に駆動
する伝動機構と、前記ブラシレスモータの回転位
置検出信号より所定ピツチのパルスを作るパルス
回路と、前記パルスによりレンズの駆動量と駆動
速度の制御を行う駆動回路とを備えて成るレンズ
駆動装置。 A drive source consisting of a multi-phase brushless motor,
a transmission mechanism that drives the lens in the optical axis direction by the driving force of the drive source; a pulse circuit that generates pulses at a predetermined pitch from a rotational position detection signal of the brushless motor; and control of the driving amount and driving speed of the lens using the pulses. A lens driving device comprising a driving circuit that performs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15572087U JPH0159211U (en) | 1987-10-12 | 1987-10-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15572087U JPH0159211U (en) | 1987-10-12 | 1987-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0159211U true JPH0159211U (en) | 1989-04-13 |
Family
ID=31433602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15572087U Pending JPH0159211U (en) | 1987-10-12 | 1987-10-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0159211U (en) |
-
1987
- 1987-10-12 JP JP15572087U patent/JPH0159211U/ja active Pending
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