JPH0446251Y2 - - Google Patents
Info
- Publication number
- JPH0446251Y2 JPH0446251Y2 JP1985074569U JP7456985U JPH0446251Y2 JP H0446251 Y2 JPH0446251 Y2 JP H0446251Y2 JP 1985074569 U JP1985074569 U JP 1985074569U JP 7456985 U JP7456985 U JP 7456985U JP H0446251 Y2 JPH0446251 Y2 JP H0446251Y2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- front plate
- cylindrical body
- slit
- lens unit
- 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
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
- Lens Barrels (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、モニター用テレビカメラ等へのレ
ンズ組込み位置をスライドさせて、焦点調節をす
る機構に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a mechanism for adjusting the focus by sliding the lens assembly position in a monitor television camera or the like.
（従来の技術）
一般に、モニター用テレビカメラの内部に組込
まれた撮像部品と、外部から取付けられたカメラ
レンズとの間隔を調整して焦点調節をすることが
必要である。(Prior Art) Generally, it is necessary to adjust the focus by adjusting the distance between an imaging component built into the interior of a monitor television camera and a camera lens attached from the outside.
従来は、レンズを有するレンズユニツトと機器
ケースの前面板との間に円筒体を介在させ、レン
ズユニツトの取付けられた円筒体を、円筒体外周
に設けられた雄ネジと前面板に設けられた雌ネジ
とによつて前後方向に調整し、焦点を合わせるも
のがあつた。 Conventionally, a cylindrical body was interposed between a lens unit having a lens and a front plate of an equipment case, and the cylindrical body to which the lens unit was attached was connected to a male screw provided on the outer periphery of the cylindrical body and a male screw provided on the front plate. There was one that adjusted the focus in the front and back direction using a female screw.
前面板には上記雌ネジと直交して止めネジがね
じ込まれ、上記円筒体を任意に回転せしめた位置
において固定するようにしていた（例えば、実開
昭56−56265号公報参照）。 A set screw is screwed into the front plate perpendicularly to the female screw to fix the cylindrical body in any rotated position (for example, see Japanese Utility Model Application Publication No. 56-56265).
（考案が解決しようとする課題）
ところがこのようにすると、焦点が合うように
円筒体を前後させた後に、止めネジで円筒体を押
えつけることになるので、円筒板は前面板に対し
て止めネジの進行方向へわずかに動かされること
になる。そのため、せつかく焦点を合わせておい
たのに、レンズユニツトの中心軸がずれてしまい
焦点が合わなくなることがあつた。また、止めネ
ジ一点で固定されることになるので、固定の状態
が不安定となることがあつた。(Problem that the invention aims to solve) However, when doing this, the cylindrical body is moved back and forth so that it is in focus, and then the cylindrical body is held down with a set screw, so the cylindrical plate is not held against the front plate. The screw will be moved slightly in the direction of movement. As a result, even though I had tried my best to focus, the center axis of the lens unit was shifted and the lens could no longer be focused. In addition, since it is fixed with a single set screw, the state of fixation may become unstable.
この考案は、上記従来の問題を解決するために
成されたもので、円筒体を回転させて焦点を合わ
せた後に、円筒体を前面板に固定してもレンズユ
ニツトの中心軸がずれることがなく、したがつて
一度合わせた焦点がずれることがなく、また、円
筒体を安定して前面板に取付けることができるよ
うな、焦点調節機構を提供することを目的として
いる。 This idea was made to solve the above-mentioned conventional problem, and even after the cylinder is rotated and focused, the center axis of the lens unit does not shift even if the cylinder is fixed to the front plate. Therefore, it is an object of the present invention to provide a focus adjustment mechanism that does not shift the focus once set and that allows the cylindrical body to be stably attached to the front plate.
（課題を解決するための手段）
前記目的を達成するために、この考案による焦
点調節機構は、内周面に内周ネジが形成され外周
面に外周ネジが形成された円筒状の円筒体と、前
記内周ネジに結合されたネジ部を持つレンズユニ
ツトと、前記外周ネジに結合されたネジ部を持つ
機器ケースの前面板とをそなえ、この前面板のネ
ジ部周囲一カ所をスリツト状に切欠いたスリツト
状部を形成し、このスリツト状部の両側にネジ孔
を設け、このネジ孔にスリツト状部の間隔を可変
するための締付ネジを結合するとともに、前記前
面板のネジ部に対する前記円筒体の外周ネジの結
合位置を可変にすることにより前記レンズユニツ
トの焦点位置を調節するようにすることにより構
成されている。(Means for Solving the Problems) In order to achieve the above object, the focus adjustment mechanism according to this invention includes a cylindrical body having an inner circumferential thread formed on the inner circumferential surface and an outer circumferential thread formed on the outer circumferential surface. , a lens unit having a threaded portion coupled to the inner circumferential screw, and a front plate of an equipment case having a threaded portion coupled to the outer circumferential screw, and a slit-like part formed around the threaded portion of the front plate. A notched slit-shaped part is formed, screw holes are provided on both sides of this slit-shaped part, and a tightening screw for varying the interval of the slit-shaped part is connected to this screw hole, and a screw is connected to the threaded part of the front plate. The focal position of the lens unit is adjusted by varying the connection position of the outer peripheral screw of the cylindrical body.
（作用）
このように構成されており、レンズユニツトの
取付けられた円筒体を前面板にネジ結合し、円筒
体を回転させることによりレンズの焦点が合わさ
れる。(Function) With this structure, the cylindrical body to which the lens unit is attached is screwed to the front plate, and the lens is focused by rotating the cylindrical body.
レンズの焦点が合つたところで締付けネジを締
めると前面板に設けられたスリツト状部の幅が狭
められ前面板のネジ部内径が徐々に小さくなつて
いき、円筒体は前面板に固定される。 When the tightening screw is tightened when the lens is in focus, the width of the slit-shaped portion provided in the front plate is narrowed, the inner diameter of the threaded portion of the front plate gradually becomes smaller, and the cylindrical body is fixed to the front plate.
このとき、円筒体外周面の外周ネジは、前面板
のネジ部によつて周囲全体を均等に締めつけられ
る。そのため、レンズユニツトの中心軸がずれる
ようなことはなく、一度合わせた焦点がずれるこ
ともない。また、円筒体は前面板に対して安定し
て取付けられる。 At this time, the outer circumferential screws on the outer circumferential surface of the cylindrical body are evenly tightened around the entire circumference by the threaded portions of the front plate. Therefore, the central axis of the lens unit will not shift, and the focus once set will not shift. Further, the cylindrical body can be stably attached to the front plate.
（実施例）
以下、図面に示す実施例に基ずいて、この考案
を詳細に説明する。(Example) Hereinafter, this invention will be explained in detail based on the example shown in the drawings.
焦点調節機構は、第１図に示すように、内周面
と内周ネジ１０が形成され外周面に外周ネジ１１
が形成された円筒状の円筒体１２と、この内周ネ
ジ１０に結合されるネジ部１３を持つレンズユニ
ツト１４と、外周ネジ１１に結合されるネジ部１
５を持つモニター用テレビカメラなどの機器ケー
スの前面板１６とをそなえている。 As shown in FIG. 1, the focus adjustment mechanism includes an inner circumferential surface and an inner circumferential screw 10, and an outer circumferential screw 11 on the outer circumferential surface.
A lens unit 14 having a threaded portion 13 coupled to the inner circumferential thread 10, and a threaded portion 1 coupled to the outer circumferential thread 11.
5 and a front plate 16 of a device case such as a monitor television camera.
ネジ部１５は前面板１６を貫通して設けられ、
前面板１６にはネジ部１５の周囲一カ所をスリツ
ト状に切欠いたスリツト状部１７が形成され、ス
リツト状部１７の両側にネジ孔１８が形成され、
このネジ孔１８に前面板１６の側方から締付ネジ
１９が結合され、この締付ネジ１９によつてスリ
ツト状部１７の間隔、すなわちネジ部１５の内径
が可変しうるようになつている。 The threaded portion 15 is provided to penetrate the front plate 16,
A slit-shaped part 17 is formed in the front plate 16 by cutting out a slit-shaped part at one place around the threaded part 15, and screw holes 18 are formed on both sides of the slit-shaped part 17.
A tightening screw 19 is connected to this screw hole 18 from the side of the front plate 16, and the interval between the slit-like portions 17, that is, the inner diameter of the threaded portion 15 can be varied by the tightening screw 19. .
なお、前面板１６の後方にシヤーシ２０が取付
けられ、このシヤーシ２０に撮像部品（図示せ
ず）がレンズユニツト１４と同軸に位置するよう
組込まれている。 A chassis 20 is attached to the rear of the front plate 16, and an imaging component (not shown) is installed in the chassis 20 so as to be coaxial with the lens unit 14.
以上のように構成されており、締付ネジ１９を
緩めると、スリツト状部１７の間隔とネジ部１５
の内径が拡がる。この状態で、レンズユニツト１
４を円筒体１２にネジ結合し、円筒体１２を前面
板１６にネジ結合する。そして、円筒体１２とこ
れに結合されたレンズユニツト１４とは、左右に
回転させるとネジ部１５の中心軸に沿つて前後に
進退動作をする。この進退動作によつて、レンズ
ユニツト１４の焦点位置が調節され、焦点の合つ
た位置で締付ネジ１９を締付けると、スリツト状
部１７の間隔とネジ部１５の内径が縮まつて、円
筒体１２が前面板１６に固定される。 With the structure described above, when the tightening screw 19 is loosened, the interval between the slit-shaped parts 17 and the threaded part 15 are changed.
The inner diameter of is expanded. In this state, lens unit 1
4 is screwed to the cylindrical body 12, and the cylindrical body 12 is screwed to the front plate 16. When the cylindrical body 12 and the lens unit 14 coupled thereto are rotated left and right, they advance and retreat back and forth along the central axis of the threaded portion 15. By this forward and backward movement, the focal position of the lens unit 14 is adjusted, and when the tightening screw 19 is tightened at the focused position, the interval between the slit-shaped parts 17 and the inner diameter of the threaded part 15 are reduced, and the cylindrical body is 12 is fixed to the front plate 16.
このとき、ネジ部１５は、締付ネジ１９を締付
けるにしたがつて、外周ネジ１１の周囲全体を均
等に締付けていく。そのため、締付ネジ１９を締
付けてもレンズユニツト１４の中心軸がずれるこ
とがない。また、外周ネジ１１の全周がネジ部１
５によつて支持されるので、円筒体には前面板１
６に対して安定して固定される。 At this time, as the tightening screw 19 is tightened, the threaded portion 15 evenly tightens the entire circumference of the outer circumferential screw 11. Therefore, even if the tightening screw 19 is tightened, the central axis of the lens unit 14 will not shift. In addition, the entire circumference of the outer circumferential screw 11 is the threaded portion 1
5, the cylindrical body has a front plate 1.
It is stably fixed against 6.
この固定状態でレンズユニツト１４を左に回転
させると、円筒体１２とのネジ結合が解かれて取
外され、レンズユニツト１４の保守や交換作業が
行われる。焦点位置の再調整が必要なときは、締
付ネジ１９を再び緩めて上記同様の作業を繰り返
す。 When the lens unit 14 is rotated to the left in this fixed state, the screw connection with the cylindrical body 12 is released and removed, and the lens unit 14 can be maintained or replaced. If readjustment of the focus position is necessary, loosen the tightening screw 19 again and repeat the same operation as above.
（考案の効果）
上述のようにこの考案によれば、レンズユニツ
トの焦点位置が調整された状態で、レンズユニツ
トの中心軸をずれさせることなく円筒体を前面板
に安定して固定させることができるという実用上
優れた効果が得られる。(Effects of the invention) As described above, according to this invention, it is possible to stably fix the cylindrical body to the front plate without shifting the central axis of the lens unit while the focal position of the lens unit is adjusted. An excellent practical effect can be obtained.
第１図は、この考案を実施した焦点調節機構の
分解斜視図である。
１０……内周ネジ、１１……外周ネジ、１２…
…円筒体、１３，１５……ネジ部、１４……レン
ズユニツト、１６……前面板、１７……スリツト
状部、１８……ネジ孔、１９……締付ネジ。
FIG. 1 is an exploded perspective view of a focus adjustment mechanism implementing this invention. 10...Inner circumference screw, 11...Outer circumference screw, 12...
... Cylindrical body, 13, 15 ... Threaded part, 14 ... Lens unit, 16 ... Front plate, 17 ... Slit-shaped part, 18 ... Threaded hole, 19 ... Tightening screw.
Claims (1)
が形成された円筒状の円筒体と、前記内周ネジに
結合されたネジ部を持つレンズユニツトと、前記
外周ネジに結合されたネジ部を持つ機器ケースの
前面板とをそなえ、この前面板のネジ部周囲一カ
所をスリツト状に切欠いたスリツト状部を形成
し、このスリツト状部の両側にネジ孔を設け、こ
のネジ孔にスリツト状部の間隔を可変するための
締付ネジを結合するとともに、前記前面板のネジ
部に対する前記円筒体の外周ネジの結合位置を可
変にすることにより前記レンズユニツトの焦点位
置を調節するようにしてなる焦点調節機構。 A cylindrical body having an inner circumferential thread formed on its inner circumferential surface and an outer circumferential thread formed on its outer circumferential surface, a lens unit having a threaded portion coupled to the inner circumferential thread, and a screw coupled to the outer circumferential thread. A slit-shaped part is formed by cutting out a slit-shaped part in one place around the screw part of this front plate, and a screw hole is provided on both sides of this slit-shaped part, and a screw hole is provided in the screw hole. The focal position of the lens unit is adjusted by coupling a tightening screw for varying the interval between the slit-shaped parts and by varying the coupling position of the outer peripheral screw of the cylindrical body with respect to the threaded part of the front plate. Focus adjustment mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985074569U JPH0446251Y2 (en) | 1985-05-20 | 1985-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985074569U JPH0446251Y2 (en) | 1985-05-20 | 1985-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61190513U JPS61190513U (en) | 1986-11-27 |
| JPH0446251Y2 true JPH0446251Y2 (en) | 1992-10-30 |
Family
ID=30614995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985074569U Expired JPH0446251Y2 (en) | 1985-05-20 | 1985-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446251Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100351143B1 (en) * | 1999-12-30 | 2002-09-09 | 엘지전자 주식회사 | Lens focusing device of a videophone |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5656265U (en) * | 1979-10-05 | 1981-05-15 |
-
1985
- 1985-05-20 JP JP1985074569U patent/JPH0446251Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61190513U (en) | 1986-11-27 |
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