JPS5912857Y2 - back focus device - Google Patents
back focus deviceInfo
- Publication number
- JPS5912857Y2 JPS5912857Y2 JP8694478U JP8694478U JPS5912857Y2 JP S5912857 Y2 JPS5912857 Y2 JP S5912857Y2 JP 8694478 U JP8694478 U JP 8694478U JP 8694478 U JP8694478 U JP 8694478U JP S5912857 Y2 JPS5912857 Y2 JP S5912857Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil assembly
- mounting plate
- guide
- assembly mounting
- back focus
- 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
Links
Description
【考案の詳細な説明】
この考案はテレビジョン用の、あるいは光学系のバック
フォーカス装置に関するものである。[Detailed Description of the Invention] This invention relates to a back focus device for television or an optical system.
従来この種のバックフォーカス装置は、レンズとコイル
アセンブリーに入っているビジコン面の焦点距離を調整
するため、カメラ本体の後面からコイルアセンブリーを
前後に移動できるようにしていた。Conventionally, this type of back focus device allows the coil assembly to be moved back and forth from the rear of the camera body in order to adjust the focal length of the vidicon surface contained in the lens and coil assembly.
しかもこの焦点距離調整は光学的調整であるため、この
バックフォーカス装置のガイドには精度の良い高価なも
のを使用して、前後調整時に蛇行したりするのを防ぐ必
要があった。Moreover, since this focal length adjustment is an optical adjustment, it was necessary to use a highly accurate and expensive guide for this back focus device to prevent it from meandering during front-rear adjustment.
そこで従来のバックフォーカス装置としては、一般に第
１図に示すような構造のものが用いられている。Therefore, as a conventional back focus device, one having a structure as shown in FIG. 1 is generally used.
すなわち第１図において、ガイド１はカメラ本体２の両
側において、ガイド固定ねじ３によりカメラ本体２に固
定されている。That is, in FIG. 1, the guide 1 is fixed to the camera body 2 by guide fixing screws 3 on both sides of the camera body 2. As shown in FIG.
またガイド１の溝４にはコイルアセンブリー５とビジコ
ン６とを取り付けたコイルアセンブリー取付板７がはま
り込むようになっている。Further, a coil assembly mounting plate 7 to which a coil assembly 5 and a vidicon 6 are attached is fitted into the groove 4 of the guide 1.
このコイルセンブリ−取付板７はねし棒８によってカメ
ラ本体２に対し、前後動自在に連結されており、そのね
じ棒８の先端にはつまみ９が固定されている。This coil assembly mounting plate 7 is connected to the camera body 2 by a screw rod 8 so as to be movable back and forth, and a knob 9 is fixed to the tip of the screw rod 8.
しかしこの従来のバックフォーカス装置では、ガイド１
をカメラ本体２にガイド固定ねじ３で取り付ける時の取
付寸法誤差によって、どんなにガイド１を精度よく作っ
ていても、コイルアセンブリー取゛付板７は調整時に蛇
行してしまうという欠点があった。However, in this conventional back focus device, the guide 1
No matter how precisely the guide 1 is made, the coil assembly mounting plate 7 tends to meander during adjustment due to mounting dimensional errors when the guide fixing screw 3 is used to attach the coil assembly to the camera body 2.
またガイド１の溝４の内壁面とコイルアセンブリー取付
板７のスライド面が面当りのためスライド摩擦が大きく
なり、コイルアセンブリー取付板７の前後調整がしにく
かったり、またガイド溝４にコイルアセンブリー取付板
７が食い込んでガイド１を変形させる等の欠点があった
。In addition, since the inner wall surface of the groove 4 of the guide 1 and the sliding surface of the coil assembly mounting plate 7 are in contact with each other, sliding friction increases, making it difficult to adjust the coil assembly mounting plate 7 back and forth. There were drawbacks such as the assembly mounting plate 7 digging into the guide 1 and deforming it.
この考案は、これらの従来のものの欠点を除去するため
になされたもので、コイルアセンブリー取付板の両端を
下または上からたがい違いに押圧して取付板を前後動自
在に保持する下ガイドおよび上ガイドをカメラ本体と一
体に形成することにより、安価に製作できるとともに、
バックフォーカス調整時でも蛇行せず、調整後もコイル
アセンブリー取付板を確実に固着できるバックフォーカ
ス装置を提供するものである。This invention was made in order to eliminate the drawbacks of these conventional ones, and includes a lower guide and a lower guide that presses both ends of the coil assembly mounting plate from below or above differently to hold the mounting plate so that it can move back and forth. By forming the upper guide integrally with the camera body, it can be manufactured at low cost, and
To provide a back focus device that does not meander even during back focus adjustment and can reliably fix a coil assembly mounting plate even after adjustment.
以下第２図および第３図に示すこの考案の一実施例につ
いて説明する。An embodiment of this invention shown in FIGS. 2 and 3 will be described below.
第２図および第３図において、２および４ないし９は第
１図と同じものを示し、１ａはカメラ本体２と一体に形
成され、コイルアセンブリー取付板７の下面と当接する
下ガイド、１ｂはこの下ガイド１ａと交互に、かつ、同
じくカメラ本体２と一体に形成され、コイルアセンブリ
−取付板７の上面および側面と当接する上ガイドである
。2 and 3, 2 and 4 to 9 indicate the same things as in FIG. 1, 1a is a lower guide formed integrally with the camera body 2 and comes into contact with the lower surface of the coil assembly mounting plate 7, 1b are upper guides that are formed alternately with the lower guides 1a and also integrally with the camera body 2, and abut against the top and side surfaces of the coil assembly-mounting plate 7.
このような構造を有するバックフォーカス装置では、下
ガイド１ａおよび上ガイド１ｂがカメラ本体２と一体に
形成されているため、従来と異なり取付誤差によるずれ
がなく、コイルアセンブリー取付板７が蛇行するような
ことがない。In the back focus device having such a structure, since the lower guide 1a and the upper guide 1b are formed integrally with the camera body 2, there is no deviation due to installation error unlike in the conventional case, and the coil assembly mounting plate 7 meanders. There is no such thing.
また下ガイド１ａと上ガイド１ｂとを交互に設け、下ガ
イド１ａの上面と上ガイド１ｂの下面とのすき間をコイ
ルアセンブリー取付板７の板７の板厚より小さくして上
ガイド１ｂかばね効果でコイルアセンブリー取付板７を
押えるようにすることにより、取付板７の板厚公差によ
るガイド部のガタがなくなり、取付板７が蛇行するよう
なことがない。In addition, the lower guide 1a and the upper guide 1b are provided alternately, and the gap between the upper surface of the lower guide 1a and the lower surface of the upper guide 1b is made smaller than the thickness of the plate 7 of the coil assembly mounting plate 7, so that the upper guide 1b has a spring effect. By holding down the coil assembly mounting plate 7, there is no play in the guide portion due to the thickness tolerance of the mounting plate 7, and the mounting plate 7 does not meander.
またこの上ガイド１ｂは取付板７の前後調整後において
もそのばね効果により取付板７を押しており、前後調整
後に調整ずれを生ずるこもない。Moreover, even after the longitudinal adjustment of the mounting plate 7, the upper guide 1b pushes the mounting plate 7 due to its spring effect, and no adjustment deviation occurs after the longitudinal adjustment.
さらに下ガイド１ａの上部のスライド面を丸くしてやり
、上ガイド１ｂの下部のスライド面も丸みを設けた突起
を出してやることにより、従来のようなコイルアセンブ
リー取付板７の板の食い込みも生じない。Furthermore, by rounding the upper sliding surface of the lower guide 1a and protruding a rounded protrusion from the lower sliding surface of the upper guide 1b, the plate of the coil assembly mounting plate 7 does not dig in as in the conventional case. .
またこのバックフォーカス装置は上下のガイドをカメラ
本体と一体に形成しているので安価に製作することがで
きる。Furthermore, this back focus device can be manufactured at low cost since the upper and lower guides are formed integrally with the camera body.
なお、以上はテレビジョン用のバックフォーカス装置の
場合について説明したが、この考案はこれに限らず光学
系の調整装置にも使用してもよい。Note that although the case of a back focus device for a television has been described above, this invention is not limited to this and may be used for an adjustment device for an optical system.
以上のようにこの考案に係るバックフォーカス装置では
、コイルアセンブリー取付板を下または上からたがい違
いに押圧する下ガイドおよび上ガイドをカメラ本体と一
体に形成することにより、コイルアセンブリー取付板を
前後方向に蛇行なくスムーズに可動でき、可動調整後も
ずれがなく、さらに装置を安価に製作できる等の効果を
有する。As described above, in the back focus device according to this invention, the lower guide and the upper guide that press the coil assembly mounting plate from below or above are formed integrally with the camera body, so that the coil assembly mounting plate can be pressed against the coil assembly mounting plate. It can be moved smoothly in the front and back direction without meandering, there is no deviation even after adjustment of the movement, and the device can be manufactured at a low cost.
第１図は従来のバックフォーカス装置の斜視図、第２図
はこの考案の一実施例を示す斜視図、第３図は第２図の
正面図である。
１ａ・・・下ガイド、１ｂ・・・上ガイド、２・・・カ
メラ本体、５・・・コイルアセンブリー、６・・・ビジ
コン、７・・・コイルアセンブリー取付板。
なお図中、同一あるいは相当部分には同一符号を付して
示しである。FIG. 1 is a perspective view of a conventional back focus device, FIG. 2 is a perspective view showing an embodiment of this invention, and FIG. 3 is a front view of FIG. 2. 1a...Lower guide, 1b...Upper guide, 2...Camera body, 5...Coil assembly, 6...Visicon, 7...Coil assembly mounting plate. In the drawings, the same or corresponding parts are designated by the same reference numerals.
Claims (1)
センブリー取付板と、カメラ本体と一体に形成され前記
コイルアセンブリー取付板の両端の下面と当接する複数
の下ガイドと、前記カメラ本体と一体にかつ前記下ガイ
ドと交互に形成され前記コイルアセンブリー取付板の両
端の側面および上面を当接する複数の上ガイドとを備え
、前記下ガイドおよび上ガイドにより前記コイルアセン
ブリー取付板を前後動自在に保持するようにしたことを
特徴とするバックフォーカス装置。a coil assembly mounting plate to which a coil assembly and a bidicon are attached; a plurality of lower guides formed integrally with the camera body and abutting the lower surfaces of both ends of the coil assembly mounting plate; A plurality of upper guides are formed alternately with the guides and abut the side surfaces and the upper surface of both ends of the coil assembly mounting plate, and the coil assembly mounting plate is held movably back and forth by the lower guide and the upper guide. A back focus device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8694478U JPS5912857Y2 (en) | 1978-06-23 | 1978-06-23 | back focus device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8694478U JPS5912857Y2 (en) | 1978-06-23 | 1978-06-23 | back focus device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS553595U JPS553595U (en) | 1980-01-10 |
| JPS5912857Y2 true JPS5912857Y2 (en) | 1984-04-17 |
Family
ID=29012008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8694478U Expired JPS5912857Y2 (en) | 1978-06-23 | 1978-06-23 | back focus device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912857Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2562306B1 (en) * | 1984-03-30 | 1990-03-02 | Fay Stefan De | MODULAR DEVICE FOR EXTENDING THE INFORMATION ACCESS CAPACITY (IMAGES) OF A "SINGLE-SIDED VIDEODISK READER" BY ITS TRANSFORMATION INTO A MULTI-SIDED MULTI-VIDEODISK READER |
-
1978
- 1978-06-23 JP JP8694478U patent/JPS5912857Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS553595U (en) | 1980-01-10 |
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