JP2902466B2 - Electric hoisting camera - Google Patents
Electric hoisting cameraInfo
- Publication number
- JP2902466B2 JP2902466B2 JP2248379A JP24837990A JP2902466B2 JP 2902466 B2 JP2902466 B2 JP 2902466B2 JP 2248379 A JP2248379 A JP 2248379A JP 24837990 A JP24837990 A JP 24837990A JP 2902466 B2 JP2902466 B2 JP 2902466B2
- Authority
- JP
- Japan
- Prior art keywords
- spool
- take
- camera
- electric motor
- film
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/42—Interlocking between shutter operation and advance of film or change of plate or cut-film
- G03B17/425—Interlocking between shutter operation and advance of film or change of plate or cut-film motor drive cameras
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Cameras Including Film Mechanisms (AREA)
Description
【発明の詳細な説明】 「技術分野」 本発明は、電動巻上カメラに関し、特に巻取スプール
の駆動系の破損防止構造に関する。Description: TECHNICAL FIELD The present invention relates to an electric hoist camera, and more particularly to a structure for preventing a drive system of a take-up spool from being damaged.
「従来技術およびその問題点」 電動巻上（巻戻）カメラは、電動モータの回転を減速
ギヤ列を介して巻取スプールに伝達し、この巻取スプー
ルにフィルムを巻き取る。また巻戻に際しては、巻取ス
プールを逆転するとともに、パトローネ室内の巻戻フォ
ークに電動モータの回転を伝達し、巻取スプールに巻か
れていたフィルムをパトローネ内に巻き戻す。"Prior art and its problems" The electric wind-up (rewind) camera transmits the rotation of the electric motor to a take-up spool via a reduction gear train, and winds up the film on the take-up spool. In rewinding, the take-up spool is rotated in the reverse direction, and the rotation of the electric motor is transmitted to the rewind fork in the patrone chamber to rewind the film wound on the take-up spool into the patrone.
この電動巻上カメラは、以上の通常の使用態様では何
ら問題は生じない。ところがフィルムが入っているのに
誤って裏蓋を開けた場合、ユーザによっては、巻取スプ
ールに巻かれているフィルムを強引に引っ張ってから外
してしまうことがある。すると、巻取スプールは、巻取
方向と反対の方向に強制的に回転され、その結果、最悪
の場合、減速ギヤ列あるいは電動モータが破損するとい
う事故の生じることが判明した。これは、フィルムを強
制的に引っ張った場合には、巻取スプールは通常の巻上
巻戻動作に比して遥かに早い速度で回転し、減速ギヤ列
に高負荷が掛かるばかりか、減速ギヤ列は電動モータ側
から見れば増速ギヤ列として作用するため、電動モータ
が高速で強制回転させられてしまうことによる。勿論、
減速ギヤ列および電動モータを、上記のような場合に予
想される負荷に応じた強度で設計すれば、このような問
題は生じないが、この解決策は、減速ギヤ列および電動
モータの大型化を生じ、カメラの小型化の妨げとなる。This electric hoist camera does not cause any problem in the above-described normal use mode. However, if the back cover is opened by mistake while the film is loaded, some users may forcibly pull the film wound on the take-up spool and then remove it. Then, it has been found that the take-up spool is forcibly rotated in the direction opposite to the take-up direction, and as a result, in the worst case, an accident occurs in which the reduction gear train or the electric motor is damaged. This is because when the film is forcibly pulled, the take-up spool rotates at a much faster speed than the normal winding and rewinding operation, and not only does the reduction gear train have a high load, but also the reduction gear train. This is because the electric motor acts as a speed increasing gear train when viewed from the electric motor side, so that the electric motor is forcibly rotated at high speed. Of course,
If the reduction gear train and the electric motor are designed with the strength corresponding to the load expected in the above case, such a problem does not occur, but this solution solves the problem of increasing the size of the reduction gear train and the electric motor. And hinders miniaturization of the camera.
「発明の目的」 本発明は、このような問題点の発見に基づき、巻取ス
プールをフィルム巻取方向と反対の方向に強制回転させ
た場合に、減速ギヤ列あるいは電動モータの破損を防止
することができる電動巻上カメラを得ることを目的とす
る。"Object of the Invention" The present invention, based on the discovery of such a problem, prevents breakage of a reduction gear train or an electric motor when a take-up spool is forcibly rotated in a direction opposite to a film winding direction. It is an object of the present invention to obtain an electric hoisting camera capable of performing the following.
「発明の概要」 本発明は、電動モータの回転を減速ギヤ列を介して巻
取スプールに伝達し、該巻取スプールにフィルムを巻き
取る電動巻上カメラにおいて、巻取スプールを、合成樹
脂材料から構成して、この巻取スプールと一体に、自由
端部が半径方向に弾性変形可能な弾性腕と、この弾性腕
の自由端部に半径方向に向けて形成した係止爪とを成形
し、電動モータ及び減速ギヤ列によって回転駆動され
る、巻取スプールの中心部に同軸に設けた中心ギヤに、
その略半径方向に向けて、巻取スプールの弾性腕の係止
爪と係脱可能な係止面を設け、この係止爪と係止面は、
中心ギヤがフィルム巻上方向に回転するときその回転を
該巻取スプールに伝達し、巻取スプールに巻取方向と反
対方向の一定以上の負荷が加わったとき該巻取スプール
の空転を許す態様としたことを特徴としている。SUMMARY OF THE INVENTION The present invention relates to an electric hoist camera that transmits rotation of an electric motor to a take-up spool via a reduction gear train and winds a film around the take-up spool. An elastic arm whose free end is elastically deformable in the radial direction and a locking claw formed radially on the free end of the elastic arm are formed integrally with the take-up spool. A central gear coaxially provided at the center of the take-up spool, which is rotationally driven by an electric motor and a reduction gear train
Toward the substantially radial direction, a locking surface is provided which can be engaged with and disengaged from the locking claw of the elastic arm of the take-up spool.
When the center gear rotates in the film winding direction, the rotation is transmitted to the winding spool, and when a load of a certain amount or more in the opposite direction to the winding direction is applied to the winding spool, the winding spool is allowed to idle. It is characterized by having.
「発明の実施例」 以下図示実施例について本発明を説明する。電動モー
タ11の出力軸12にはピニオン13が一体に設けられ、この
ピニオン13は、アイドルギヤ14を介して、中心ギヤ15に
噛み合っている。電動モータ11には、スイッチＳを介し
てバッテリＢの電源電圧が供給される。"Examples of the Invention" The present invention will be described below with reference to illustrated examples. A pinion 13 is provided integrally with the output shaft 12 of the electric motor 11, and the pinion 13 meshes with a center gear 15 via an idle gear 14. The power supply voltage of the battery B is supplied to the electric motor 11 via the switch S.
巻取スプール16は、この中心ギヤ15と同軸に位置して
いて、その一端面に、中心ギヤ15の筒状部15aを嵌入さ
せる円孔部16aを有している。中心ギヤ15の筒状部15aに
は、その一部に、半径方向内方に向いた係止面15bと、
これに続く逃げ面15cが形成されている。The take-up spool 16 is located coaxially with the center gear 15, and has a circular hole portion 16a on one end surface into which the cylindrical portion 15a of the center gear 15 is fitted. The cylindrical portion 15a of the central gear 15 has, on a part thereof, a locking surface 15b facing inward in the radial direction,
A flank 15c following this is formed.
巻取スプール16には、円孔部16aの外側に、弧状溝16b
が形成されていて、この弧状溝16bにより、円弧状の弾
性脚16cが構成されている。この弾性脚16cは、基部が巻
取スプール16に一体であり、自由端部に、半径方向内方
に向いた係止爪16dが形成されている。弾性脚16cの先端
は、半径方向に弾性変形可能であり、係止爪16dは、常
時は中心ギヤ15の係止面15bと係合する。巻取スプール1
6の外周一部には、フィルムＦのパーフォレーションＰ
に嵌まる突起16eが形成されている。The winding spool 16 has an arc-shaped groove 16b outside the circular hole 16a.
Are formed, and the arc-shaped groove 16b forms an arc-shaped elastic leg 16c. The base of the elastic leg 16c is integral with the take-up spool 16, and a locking claw 16d that faces inward in the radial direction is formed at the free end. The distal end of the elastic leg 16c is elastically deformable in the radial direction, and the locking claw 16d always engages with the locking surface 15b of the center gear 15. Take-up spool 1
6 has a perforation P of film F
Is formed.
図では、単純化して示しているが、ピニオン13、アイ
ドルギヤ14および中心ギヤ15は、電動モータ11の回転を
減速して巻取スプール16に伝達する減速ギヤ列を構成す
る。Although illustrated in a simplified manner, the pinion 13, the idle gear 14, and the center gear 15 form a reduction gear train that reduces the rotation of the electric motor 11 and transmits the rotation to the take-up spool 16.
上記構成の本装置は、スイッチＳを破線で示すオン位
置にして、バッテリＢの電圧を電動モータ11に加える
と、ピニオン13、アイドルギヤ14および中心ギヤ15が矢
印Ａ方向に回転する。中心ギヤ15の係止面15bと、巻取
スプール16の係止爪16dとは、中心ギヤ15が矢印Ａ方向
に回転するとき、巻取スプール16が共に同方向に回転す
る向きに形成されている。従って巻取スプール16は中心
ギヤ15によりＡ方向に回転し、パーフォレーションＰと
嵌合している突起16eが、フィルムＦをその外周面に巻
き取っていく。この巻取動作は、フィルム装填時、およ
び撮影動作毎に行なわれる。When the switch S is set to the ON position indicated by the broken line and the voltage of the battery B is applied to the electric motor 11, the pinion 13, the idle gear 14, and the center gear 15 rotate in the direction of arrow A in the above-described configuration. The locking surface 15b of the center gear 15 and the locking claw 16d of the take-up spool 16 are formed so that when the center gear 15 rotates in the direction of arrow A, the take-up spool 16 rotates in the same direction. I have. Accordingly, the take-up spool 16 is rotated in the direction A by the center gear 15, and the projection 16e fitted with the perforation P takes up the film F around its outer peripheral surface. This winding operation is performed at the time of loading the film and every photographing operation.
以上の巻上装置において、いま、巻取スプール16にフ
ィルムＦが巻き取られた状態で、カメラの裏蓋が開けら
れ、ユーザがフィルムＦを引っ張って、巻取スプール16
をＡと反対のＢ方向に強制回転させる場合を考える。こ
のときスイッチＳは、実線のオフ位置に倒されて電動モ
ータ11の両端子を短絡させ、該モータ11にブレーキを掛
けた状態にある。また減速ギヤ列の回転抵抗によって
も、中心ギヤ15には、ブレーキが掛かっている。この状
態においてフィルムＦを引っ張って巻取スプール16を強
制回転させると、巻取スプール16の弾性脚16cは半径方
向外方に弾性変形し、その係止爪16dと、中心ギヤ15の
係止面15bとの係合が解除される。従って、巻取スプー
ル16は、ブレーキが掛かった状態の中心ギヤ15に対して
空転し、中心ギヤ15は回転しない。よって中心ギヤ15を
含む減速ギヤ列あるいは電動モータ11の破損を未然に防
止することができる。In the above winding device, the back cover of the camera is opened with the film F wound on the winding spool 16 and the user pulls the film F, and the winding spool 16
Is forcibly rotated in the direction B opposite to the direction A. At this time, the switch S is tilted to the OFF position indicated by the solid line to short-circuit both terminals of the electric motor 11, and the motor 11 is in a state of being braked. The central gear 15 is also braked by the rotational resistance of the reduction gear train. In this state, when the film F is pulled and the take-up spool 16 is forcibly rotated, the elastic legs 16c of the take-up spool 16 are elastically deformed radially outward, and the locking claws 16d and the locking surfaces of the central gear 15 are formed. The engagement with 15b is released. Therefore, the take-up spool 16 idles with respect to the central gear 15 in a state where the brake is applied, and the central gear 15 does not rotate. Therefore, it is possible to prevent the reduction gear train including the center gear 15 or the electric motor 11 from being damaged.
図では、簡単のため、巻取スプール16の弾性脚16c、
係止爪16dと、中心ギヤ15の係止面15bを、一組のみ図示
したが、これらは複数組、例えば３組を円周方向に等間
隔で設けることが可能である。In the figure, for simplicity, the elastic legs 16c of the take-up spool 16,
Although only one set of the locking claw 16d and the locking surface 15b of the center gear 15 is illustrated, a plurality of sets, for example, three sets can be provided at equal intervals in the circumferential direction.
「発明の効果」 以上のように、本発明によれば、カメラの裏蓋を誤っ
て開け、巻取スプールに巻き取られているフィルムを強
制的に引っ張る場合のように、巻取スプールがフィルム
巻取方向と反対の方向に強制回転させられたとき、該巻
取スプールを動力伝達系に対して空転させることができ
る。よって動力伝達系を構成する減速ギヤ列や電動モー
タの破損を未然に防止することができる。特に本発明の
構成によれば、従来の同種の電動巻上カメラに比し、部
品点数を増加させることなく、簡単な構成の過負荷クラ
ッチ機構を得ることができる。[Effects of the Invention] As described above, according to the present invention, as in the case where the camera back cover is accidentally opened and the film wound on the take-up spool is forcibly pulled, the take-up spool When forcibly rotated in the direction opposite to the winding direction, the winding spool can idle with respect to the power transmission system. Therefore, it is possible to prevent the reduction gear train and the electric motor constituting the power transmission system from being damaged. In particular, according to the configuration of the present invention, it is possible to obtain an overload clutch mechanism having a simple configuration without increasing the number of parts as compared with a conventional electric hoist camera of the same type.
第１図は本発明の電動巻上カメラの実施例を示す要部の
分解斜視図である。 11…電動モータ、12…出力軸、13…ピニオン、14…アイ
ドルギヤ、15…中心ギヤ、15a…筒状部、15b…係止面、
15c…逃げ面、16…巻取スプール、16a…円孔部、16b…
弧状溝、16c…弾性脚、16d…係止爪、16e…突起、Ｆ…
フィルム、Ｐ…パーフォレーション、Ｓ…スイッチ、Ｂ
……バッテリ。FIG. 1 is an exploded perspective view of an essential part showing an embodiment of an electric hoist camera according to the present invention. 11: electric motor, 12: output shaft, 13: pinion, 14: idle gear, 15: center gear, 15a: cylindrical part, 15b: locking surface,
15c: flank, 16: take-up spool, 16a: circular hole, 16b ...
Arc-shaped groove, 16c: elastic leg, 16d: locking claw, 16e: projection, F ...
Film, P: Perforation, S: Switch, B
……Battery.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G03B 17/00 F16D 11/00 - 11/16 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G03B 17/00 F16D 11/00-11/16
Claims (1)
取スプールに伝達し、該巻取スプールにフィルムを巻き
取る電動巻上カメラにおいて、 上記巻取スプールを、合成樹脂材料から構成して、この
巻取スプールと一体に、自由端部が半径方向に弾性変形
可能な弾性腕と、この弾性腕の自由端部に半径方向に向
けて形成した係止爪とを成形し、 上記電動モータ及び減速ギヤ列によって回転駆動され
る、巻取スプールの中心部に同軸に設けた中心ギヤに、
その略半径方向に向けて、巻取スプールの上記弾性腕の
係止爪と係脱可能な係止面を設け、 この係止爪と係止面は、中心ギヤがフィルム巻上方向に
回転するときその回転を該巻取スプールに伝達し、巻取
スプールに巻取方向と反対方向の一定以上の負荷が加わ
ったとき該巻取スプールの空転を許すことを特徴とする
電動巻上カメラ。1. An electric hoist camera for transmitting rotation of an electric motor to a take-up spool via a reduction gear train and winding a film around the take-up spool, wherein the take-up spool is made of a synthetic resin material. Then, an elastic arm whose free end is elastically deformable in the radial direction and a locking claw formed radially on the free end of the elastic arm are formed integrally with the take-up spool. A central gear coaxially provided at the center of the take-up spool, which is rotationally driven by a motor and a reduction gear train,
A locking surface is provided in the substantially radial direction that can be disengaged from the locking claw of the elastic arm of the take-up spool. The locking claw and the locking surface allow the center gear to rotate in the film winding direction. An electric hoist camera that transmits the rotation to the take-up spool and allows the take-up spool to idle when a load in a direction opposite to the take-up direction is applied to the take-up spool.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2248379A JP2902466B2 (en) | 1990-09-18 | 1990-09-18 | Electric hoisting camera |
| GB9119469A GB2248309A (en) | 1990-09-18 | 1991-09-12 | Automatic winding camera |
| CN 91108933 CN1059971A (en) | 1990-09-18 | 1991-09-13 | Magazine camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2248379A JP2902466B2 (en) | 1990-09-18 | 1990-09-18 | Electric hoisting camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04125620A JPH04125620A (en) | 1992-04-27 |
| JP2902466B2 true JP2902466B2 (en) | 1999-06-07 |
Family
ID=17177229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2248379A Expired - Fee Related JP2902466B2 (en) | 1990-09-18 | 1990-09-18 | Electric hoisting camera |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2902466B2 (en) |
| CN (1) | CN1059971A (en) |
| GB (1) | GB2248309A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761782A (en) * | 2018-06-20 | 2018-11-06 | 东莞市维斗科技股份有限公司 | A kind of monitoring camera dust-proof mechanism |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB735443A (en) * | 1952-09-02 | 1955-08-24 | English Numbering Machines | Improvements in or relating to counting devices |
| DE1804386A1 (en) * | 1967-11-20 | 1969-07-31 | Asahi Optical Co Ltd | Automatic film rewinding device for cameras with automatic film transport |
| JPS5742034A (en) * | 1980-08-28 | 1982-03-09 | Canon Inc | Winder of camera |
| GB2092314B (en) * | 1980-12-09 | 1985-08-21 | Konishiroku Photo Ind | Film loading winding and rewinding |
| JPS5979652U (en) * | 1982-11-22 | 1984-05-29 | 浅野 清治 | Safety device for rotating mechanism using flywheel |
| US4498788A (en) * | 1983-06-03 | 1985-02-12 | Diehl Gmbh & Co. | Escapement for a timer |
-
1990
- 1990-09-18 JP JP2248379A patent/JP2902466B2/en not_active Expired - Fee Related
-
1991
- 1991-09-12 GB GB9119469A patent/GB2248309A/en not_active Withdrawn
- 1991-09-13 CN CN 91108933 patent/CN1059971A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB2248309A (en) | 1992-04-01 |
| GB9119469D0 (en) | 1991-10-23 |
| JPH04125620A (en) | 1992-04-27 |
| CN1059971A (en) | 1992-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |