JPH0377925U - - Google Patents
Info
- Publication number
- JPH0377925U JPH0377925U JP13906389U JP13906389U JPH0377925U JP H0377925 U JPH0377925 U JP H0377925U JP 13906389 U JP13906389 U JP 13906389U JP 13906389 U JP13906389 U JP 13906389U JP H0377925 U JPH0377925 U JP H0377925U
- Authority
- JP
- Japan
- Prior art keywords
- drive member
- lens
- state
- main drive
- step motor
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims 3
- 238000000819 phase cycle Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
Landscapes
- Focusing (AREA)
- Shutters For Cameras (AREA)
Description
第１図は本考案の１実施例に係るレンズ駆動機
構を兼用したレンズシヤツタ駆動機構の初期状態
における平面図、第２図は第１図の機構に使用さ
れるステツプモータの構造図、第３図は本考案の
制御システムのブロツク図、第４図は上記実施例
のタイムチヤート、第５図は上記実施例の制御用
フローチヤート、第６図は本実施例の機構におい
てレンズ駆動リングを最大ストロークした状態を
示す平面図、第７図は本実施例の機構において開
閉レバーが開口方向に作動した状態を示す平面図
、第８図は本実施例の機構においてレンズ駆動リ
ングの係合が解除された直後の状態を示す平面図
。
２……ステツプモータ、４……主駆動リング、
４ｂ……曲げ部、４ｅ……絶縁性突起、５……レ
ンズ駆動部材、５ｃ……係合突片、５ｄ……突起
、５ｅ……ラチエツトギア、８……ラチエツトレ
バー、８ａ……クリツク、８ｂ……カム面、８ｄ
……棚部、１０……開閉レバー、１８……スプリ
ングスイツチ、２０，２１……導電子。
1 is a plan view of a lens shutter drive mechanism that also serves as a lens drive mechanism according to an embodiment of the present invention in an initial state; FIG. 2 is a structural diagram of a step motor used in the mechanism shown in FIG. 1; and FIG. is a block diagram of the control system of the present invention, Fig. 4 is a time chart of the above embodiment, Fig. 5 is a control flow chart of the above embodiment, and Fig. 6 is a maximum stroke of the lens drive ring in the mechanism of this embodiment. 7 is a plan view showing a state in which the opening/closing lever is operated in the opening direction in the mechanism of this embodiment, and FIG. 8 is a plan view showing a state in which the lens drive ring is disengaged in the mechanism of this embodiment. FIG. 2...Step motor, 4...Main drive ring,
4b...Bending portion, 4e...Insulating protrusion, 5...Lens driving member, 5c...Engaging protrusion, 5d...Protrusion, 5e...Ratchet gear, 8...Ratchet lever, 8a...Click, 8b... ...Cam surface, 8d
... Shelf section, 10 ... Opening/closing lever, 18 ... Spring switch, 20, 21 ... Conductive electron.
Claims (1)
順序に対応して正逆回転可能なステツプモータと
、 該ステツプモータに連結され、該ステツプモー
タの回転方向に対応して前進方向及び復帰方向へ
駆動される主駆動部材と、 前記主駆動部材の復帰方向に向けて付勢される
とともに前記主駆動部材の前進方向への作動時に
該主駆動部材に係合されて前進し、焦点調節用レ
ンズ群を駆動するレンズ駆動部材と、 前記主駆動部材が前進方向から復帰方向に反転
する時に前記レンズ駆動部材を係合する係合部材
と、 シヤツタ羽根と連結され、前記主駆動部材が復
帰方向に作動する過程で該シヤツタ羽根を作動さ
せる様に前記主駆動部材と関連付けられた羽根駆
動部材とを備え、 前記ステツプモータの正転に伴つて前記レンズ
駆動部材が所望の合焦位置に達するまで前記主駆
動部材を前進させた後に前記ステツプモータの逆
転に伴つて前記主駆動部材を復帰させるとともに
、この主駆動部材の復帰過程において前記羽根駆
動部材を作動させる様にしたレンズ駆動機構を兼
用したレンズシヤツタにおいて、 前記主駆動部材が前記羽根駆動部材を作動させ
た後の復帰過程で前記係合部材による前記レンズ
駆動部材の係合を解除する係合解除部を該主駆動
部材に形成し、 前記主駆動部材が初期位置にあることを示す第
１の状態と、前記主駆動部材が初期位置から前進
した位置にあることを示す第２の状態とを判別す
る位置検出器を設け、 該位置検出器が第１の状態から第２の状態に論
理反転したタイミングを起算点として前記ステツ
プモータの正転量を制御するとともに、 前記位置検出器が第２の状態から第１の状態に
論理反転する領域の直前まで、前記主駆動部材が
合焦位置から復帰するのに必要なパルス数の反転
パルスを前記ステツプモータに対して供給したタ
イミングで前記位置検出器の状態を読み込み、該
位置検出器が第１の状態にあるとエラー検出をす
る様にしたことを特徴とするレンズ駆動機構を兼
用したレンズシヤツタ駆動機構。 (2) 実用新案登録請求の範囲第１項記載のレン
ズ駆動機構を兼用したレンズシヤツタ駆動機構に
おいて、 前記位置検出器が前記第１の状態と前記第２の
状態の相互間で論理反転するのに必要な主駆動リ
ングの走行距離を前記ステツプモータに供給され
るパルス数に換算して複数ステツプ分となし、 前記位置検出器の状態を読み込むタイミングで
は前記ステツプモータに供給されるパルス時間を
相対的に延長したことを特徴とするレンズ駆動機
構を兼用したレンズシヤツタ駆動機構。[Claims for Utility Model Registration] (1) A step motor that can rotate in forward and reverse directions in accordance with the phase sequence of a pulse train that is ordered and supplied; a main drive member that is driven in the forward direction and the return direction; and a main drive member that is biased in the return direction of the main drive member and that is engaged with the main drive member when the main drive member is operated in the forward direction. a lens drive member that moves forward and drives the focusing lens group; an engagement member that engages the lens drive member when the main drive member reverses from the forward direction to the return direction; and an engagement member that is connected to the shutter blade and that a blade driving member associated with the main driving member so as to operate the shutter blade in the process of the main driving member operating in the return direction; and as the step motor rotates forward, the lens driving member After the main drive member is advanced until it reaches the in-focus position, the main drive member is returned as the step motor is reversed, and the blade drive member is operated during the return process of the main drive member. In a lens shutter that also serves as a lens drive mechanism, the main drive unit includes an engagement release portion that releases engagement of the lens drive member by the engagement member in a return process after the main drive member operates the blade drive member. a position detector formed on the member and configured to discriminate between a first state in which the main drive member is in an initial position and a second state in which the main drive member is in a position advanced from the initial position; and controlling the forward rotation amount of the step motor using the timing at which the position detector logically inverts from the first state to the second state as a starting point, and when the position detector changes from the second state to the first state. The state of the position detector is read at the timing when the step motor is supplied with a number of inversion pulses necessary for the main drive member to return from the in-focus position, until just before the region where the logic is reversed to the state of A lens shutter drive mechanism that also serves as a lens drive mechanism, characterized in that an error is detected when the position detector is in a first state. (2) In the lens shutter drive mechanism that also serves as a lens drive mechanism according to claim 1 of the utility model registration claim, the position detector is logically inverted between the first state and the second state. The required travel distance of the main drive ring is converted into the number of pulses supplied to the step motor, and the number of pulses supplied to the step motor is calculated as a number of steps. A lens shutter drive mechanism that also serves as a lens drive mechanism, characterized by an extended lens drive mechanism.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13906389U JP2553701Y2 (en) | 1989-11-30 | 1989-11-30 | Lens shutter drive mechanism that doubles as lens drive mechanism |
| US07/574,284 US5111230A (en) | 1989-08-29 | 1990-08-28 | Lens shutter driving mechanism using lens driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13906389U JP2553701Y2 (en) | 1989-11-30 | 1989-11-30 | Lens shutter drive mechanism that doubles as lens drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0377925U true JPH0377925U (en) | 1991-08-06 |
| JP2553701Y2 JP2553701Y2 (en) | 1997-11-12 |
Family
ID=31686131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13906389U Expired - Fee Related JP2553701Y2 (en) | 1989-08-29 | 1989-11-30 | Lens shutter drive mechanism that doubles as lens drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553701Y2 (en) |
-
1989
- 1989-11-30 JP JP13906389U patent/JP2553701Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2553701Y2 (en) | 1997-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |