JPS6333203Y2 - - Google Patents
Info
- Publication number
- JPS6333203Y2 JPS6333203Y2 JP1983072647U JP7264783U JPS6333203Y2 JP S6333203 Y2 JPS6333203 Y2 JP S6333203Y2 JP 1983072647 U JP1983072647 U JP 1983072647U JP 7264783 U JP7264783 U JP 7264783U JP S6333203 Y2 JPS6333203 Y2 JP S6333203Y2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- frame
- fixing
- optical axis
- fixed frame
- 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
- 230000003287 optical effect Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Lens Barrels (AREA)
Description
【考案の詳細な説明】
本考案は、レンズの焦点位置出し機構、詳しく
は、レンズ鏡筒の固定枠に対して、焦点位置出し
調整用のレンズを保持した焦点調整レンズ枠を前
後させて焦点位置出しを行う焦点位置出し機構に
関する。[Detailed description of the invention] The present invention is a lens focus positioning mechanism, more specifically, a focus adjustment lens frame holding a lens for focus position adjustment is moved back and forth with respect to a fixed frame of a lens barrel. The present invention relates to a focus positioning mechanism that performs positioning.
従来のこの種の焦点位置出し機構は、その一例
を第１図に示すように構成されていた。なお、本
例におけるレンズ鏡筒０１は例えばカメラ本体に
着脱自在に装着される交換可能なレンズ鏡筒であ
つて、その主体となる固定枠１内の後端部寄りに
上記焦点調整レンズ枠２が進退自在に嵌合してお
り、同固定枠１の後端部には周知のレンズマウン
ト部材３が取付用ねじ５によつて固定されている
ものである。このようなレンズ鏡筒０１において
は、固定枠１の周壁に設けられた、光軸方向のレ
ンズ枠移動用長孔１ａを通して、焦点調整用レン
ズ４を保持する焦点調整レンズ枠２を焦点調整位
置で、固定用ねじ６によつて固定枠１に固定する
ようになつている。即ち、上記焦点調整レンズ枠
２は、上記固定用ねじ６の上記固定枠１のレンズ
枠移動用長孔１ａ内での移動範囲で固定枠１内で
光軸方向に進退し、焦点調整位置で固定されるよ
うになつている。 An example of a conventional focus positioning mechanism of this type is constructed as shown in FIG. The lens barrel 01 in this example is, for example, an exchangeable lens barrel that is detachably attached to a camera body, and the focus adjustment lens frame 2 is located near the rear end of the main fixed frame 1. A well-known lens mount member 3 is fixed to the rear end of the fixed frame 1 with a mounting screw 5. In such a lens barrel 01, the focus adjustment lens frame 2 holding the focus adjustment lens 4 is moved to the focus adjustment position through the long hole 1a for lens frame movement in the optical axis direction provided in the peripheral wall of the fixed frame 1. It is fixed to the fixed frame 1 with fixing screws 6. That is, the focus adjustment lens frame 2 moves back and forth in the optical axis direction within the fixed frame 1 within the movement range of the fixing screw 6 within the long hole 1a for lens frame movement of the fixed frame 1, and moves back and forth in the optical axis direction within the fixed frame 1. It is becoming fixed.
ところが、このような焦点位置出し機構におい
ては、上記焦点調整レンズ枠２の位置調節をする
ためのレンズ枠移動用長孔１ａが光軸方向に穿設
されているので、レンズ鏡筒０１への光軸方向の
外力に対しては上記固定用ねじ６の固定力が充分
でなく、使用中に焦点調整位置が狂つてしまうと
いう欠点を有していた。又、第２図に示すよう
に、上記焦点調整レンズ枠を固定枠１と一体的に
形成し、焦点調整の位置出しを、上記固定枠１の
後端面と上記レンズマウント部材３の、上記固定
枠取付面との間に適宜のスペーサー７を介装させ
て行うようにしたものも知られているが、このよ
うな焦点位置出し手段は、種々厚味の異なるスペ
ーサーを多数用意しなければならない上に、その
厚み毎の段階的な調整しか出来ない。更に、スペ
ーサー７を交換する度にレンズマウント部材３を
取り外さなければならず、コリメーターを見乍ら
調整することは出来ないので極めて厄介であり、
コスト高になるという欠点を有している。 However, in such a focus positioning mechanism, since the long hole 1a for moving the lens frame for adjusting the position of the focus adjustment lens frame 2 is bored in the optical axis direction, The fixing force of the fixing screw 6 is not sufficient against external force in the direction of the optical axis, resulting in a drawback that the focus adjustment position becomes erroneous during use. Further, as shown in FIG. 2, the focus adjustment lens frame is formed integrally with the fixed frame 1, and the positioning of the focus adjustment is performed by connecting the rear end surface of the fixed frame 1 and the lens mount member 3 to the fixed frame 1. It is also known that a suitable spacer 7 is interposed between the focus positioning surface and the frame mounting surface, but such focus positioning means requires the preparation of a large number of spacers of various thicknesses. On top of that, only step-by-step adjustments can be made for each thickness. Furthermore, each time the spacer 7 is replaced, the lens mount member 3 must be removed, which is extremely troublesome as it is not possible to adjust the collimator while looking at it.
It has the disadvantage of high cost.
本考案の目的は、上記の点に鑑み、上記焦点調
整レンズ枠を固定枠に対して前後に進退自在に配
設すると共に、固定枠上に周方向にのみ回動し、
上記焦点調整レンズ枠を調整位置出しした後、こ
れを固定枠に光軸方向の外力に対しても強く固定
する調整板を巧みに配設することによつて、上述
した従来のこの種の焦点位置出し機構が有してい
た欠点を見事に解消したレンズの焦点位置出し機
構を提供するにある。 In view of the above points, the object of the present invention is to arrange the focusing lens frame so that it can move forward and backward with respect to the fixed frame, and to rotate only in the circumferential direction on the fixed frame.
After the focus adjustment lens frame has been adjusted to its adjusted position, an adjustment plate is skillfully provided to firmly fix it to the fixed frame against external forces in the optical axis direction. To provide a lens focus positioning mechanism that completely eliminates the drawbacks of positioning mechanisms.
以下、本考案を図示の実施例に基いて説明す
る。 Hereinafter, the present invention will be explained based on the illustrated embodiments.
第３図Ａは、本考案の一実施例を示すレンズの
焦点位置出し機構の要部平面図であり、第３図
Ｂ，Ｃは上記第３図Ａ中のＢ−Ｂ線及びＣ−Ｃ線
に夫々沿う断面である。 FIG. 3A is a plan view of essential parts of a lens focus positioning mechanism showing an embodiment of the present invention, and FIGS. 3B and C are lines BB and C-C in FIG. 3A. These are cross sections along each line.
本考案の焦点位置出し機構は、上記第３図Ａ，
Ｂ，Ｃに示すように、レンズ鏡筒の固定枠１１の
後端部寄りの外周面上に設けられた周方向、即ち
光軸方向と直角方向の巾広の帯状の凹部１１ａ内
に摺動自在に嵌合する横長の調整板１５と、この
調整板１５の一側方寄りに設けられた光軸方向と
角度θ（θは45゜以上）の傾きをもつ傾斜長孔１５
ａと上記固定枠１１の凹部１１ａ内に固定枠１１
を貫通して設けられた光軸方向のレンズ枠移動用
長孔１１ｂとを貫通して、上記固定枠１１に進退
自在に嵌合する焦点調整レンズ群１４を保持する
焦点調整レンズ枠１２にねじ込まれる固定用ねじ
１７と、上記調整板１５の他側方寄りに設けられ
た周方向の固定用長孔１５ｂを通して上記固定枠
１１の凹部１１ａにねじ込まれるもう一つの固定
用ねじ１８とで構成されている。なお、第３図Ｂ
中の符号１３，１６は上記第１図のレンズ鏡筒に
おけるレンズマウント部材３、取付用ねじ５に相
当するレンズマウント部材及び取付用ねじを夫々
示している。 The focus positioning mechanism of the present invention is shown in FIG.
As shown in B and C, it slides into a wide band-shaped recess 11a in the circumferential direction, that is, in the direction perpendicular to the optical axis direction, provided on the outer peripheral surface near the rear end of the fixed frame 11 of the lens barrel. A horizontally elongated adjustment plate 15 that can be freely fitted into the adjustment plate 15, and an inclined elongated hole 15 that is inclined at an angle θ (θ is 45° or more) with respect to the optical axis direction and provided near one side of the adjustment plate 15.
a and the fixed frame 11 in the recess 11a of the fixed frame 11.
It is screwed into the focus adjustment lens frame 12 holding the focus adjustment lens group 14 which is fitted into the fixed frame 11 so as to be able to move forward and backward through the long hole 11b for moving the lens frame in the optical axis direction. and another fixing screw 18 that is screwed into the recess 11a of the fixing frame 11 through a circumferential long fixing hole 15b provided on the other side of the adjusting plate 15. ing. In addition, Figure 3B
Reference numerals 13 and 16 inside indicate a lens mount member and a mounting screw corresponding to the lens mount member 3 and mounting screw 5 in the lens barrel shown in FIG. 1, respectively.
次に、このように構成された本考案のレンズの
焦点位置出し機構の作用について説明する。 Next, the operation of the lens focus positioning mechanism of the present invention constructed as described above will be explained.
先ず、焦点調整の初期段階では第３図Ａに示す
ように、上記固定用ねじ１７は上記調整板１５の
傾斜長孔１５ａと固定枠１１のレンズ枠移動用長
孔１１ｂのほぼ中央部を通じて上記焦点調整レン
ズ枠１２に緩くねじ込まれ、上記調整板１５は上
記固定枠１１の凹部１１ａ内に仮固定されてい
る。そして、もう一つの固定用ねじ１８は上記調
整板１５の固定用長孔１５ｂのほぼ中央を通じて
上記固定枠１１に緩くねじ込まれ、同調整板１５
は固定枠１１の凹部１１ａ内に仮固定されてい
る。この状態から上記焦点調整レンズ枠１２を固
定枠１１内で前後させて焦点調整するには、上記
固定枠１１の凹部１１ａ内に仮固定されている上
記調整板１５を周方向に移動させる。すると、同
調整板１５の傾斜長孔１５ａの移動によつて上記
固定用ねじ１７は、上記固定枠１１のレンズ枠移
動用長孔１１ｂに沿つて光軸方向に前後動するの
で、同ねじ１７と一体の焦点調整レンズ枠１２は
前後方向に移動する。従つて、上記調整板１５を
周方向に適宜に移動させることによつて、上記焦
点調整レンズ枠１２をコリメーター等を用いて焦
点位置に移動させることが極めて簡単にできる。
このように、上記焦点調整レンズ枠１２を焦点調
整位置に移動させた後、上記仮固定のため緩くね
じ込まれていた上記固定用ねじ１７，１８を本締
めにする。すると、上記調整板１５は上記固定用
ねじ１８によつて固定枠１１の凹部１１ａ内の適
所に固定され、上記焦点調整レンズ枠１２は上記
調整板１５の光軸と傾斜した長孔１５ａに嵌入し
ている、上記固定用ねじ１７によつて、調整板１
５を介して固定枠１１に固定される。このように
レンズ枠１２を固定する上記固定用ねじ１７は、
上記傾斜長孔１５ａの傾斜面により光軸方向の外
力に対しては強い抵抗力を有しているので、焦点
調整レンズ枠１２は光軸方向の外力に対しても強
固に固定枠１１に固定され、上述した光軸方向の
外力に弱い欠点は解消される。なお、上記固定用
ねじ１８は必ずしも必要なく、上記固定用ねじ１
７のみで調整板１５と焦点調整レンズ枠１２を固
定枠１１に固定しても良いことは勿論である。 First, in the initial stage of focus adjustment, as shown in FIG. The adjustment plate 15 is loosely screwed into the focus adjustment lens frame 12, and is temporarily fixed in the recess 11a of the fixed frame 11. Another fixing screw 18 is loosely screwed into the fixing frame 11 through approximately the center of the long fixing hole 15b of the adjusting plate 15.
is temporarily fixed within the recess 11a of the fixed frame 11. To adjust the focus by moving the focus adjustment lens frame 12 back and forth within the fixed frame 11 from this state, the adjustment plate 15 temporarily fixed in the recess 11a of the fixed frame 11 is moved in the circumferential direction. Then, as the oblique elongated hole 15a of the adjustment plate 15 moves, the fixing screw 17 moves back and forth in the optical axis direction along the lens frame movement elongated hole 11b of the fixed frame 11. A focusing lens frame 12 integrated with the lens moves in the front-back direction. Therefore, by appropriately moving the adjusting plate 15 in the circumferential direction, it is extremely easy to move the focusing lens frame 12 to the focal position using a collimator or the like.
After the focus adjustment lens frame 12 has been moved to the focus adjustment position in this manner, the fixing screws 17 and 18, which have been loosely screwed in for temporary fixation, are fully tightened. Then, the adjustment plate 15 is fixed at a proper position in the recess 11a of the fixed frame 11 by the fixing screw 18, and the focus adjustment lens frame 12 is fitted into the elongated hole 15a of the adjustment plate 15, which is inclined with respect to the optical axis. The adjusting plate 1 is fixed by the fixing screw 17.
It is fixed to the fixed frame 11 via 5. The fixing screw 17 that fixes the lens frame 12 in this way is
Since the inclined surface of the inclined elongated hole 15a has a strong resistance against external forces in the optical axis direction, the focusing lens frame 12 is firmly fixed to the fixed frame 11 even against external forces in the optical axis direction. This eliminates the above-mentioned drawback of being weak against external forces in the optical axis direction. Note that the above-mentioned fixing screw 18 is not necessarily necessary, and the above-mentioned fixing screw 1
Of course, the adjusting plate 15 and the focus adjustment lens frame 12 may be fixed to the fixed frame 11 using only the fixing member 7.
以上説明したように、本考案によれば、極めて
簡単な構造で、従来のこの種の焦点位置出し機構
が有していた欠点を見事に解消することが出来
る。 As explained above, according to the present invention, the drawbacks of the conventional focus positioning mechanism of this type can be successfully overcome with an extremely simple structure.
第１，２図は、従来のレンズの焦点位置出し機
構の例を夫々示す断面図、第３図Ａは、本考案の
一実施例を示すレンズの焦点位置出し機構の要部
平面図、第３図Ｂ，Ｃは上記第３図Ａ中のＢ−Ｂ
線、Ｃ−Ｃ線に夫々沿う断面図である。
１１……固定枠、１１ａ……凹部、１１ｂ……
レンズ枠移動用長孔、１２……焦点調整レンズ
枠、１５……調整板、１５ａ……傾斜長孔、１７
……固定用ねじ。
1 and 2 are sectional views showing examples of conventional lens focus positioning mechanisms, and FIG. 3A is a plan view of essential parts of a lens focus positioning mechanism showing an embodiment of the present invention. Figure 3 B and C are B-B in Figure 3 A above.
FIG. 3 is a cross-sectional view taken along line C-C. 11... fixed frame, 11a... recess, 11b...
Long hole for lens frame movement, 12...Focus adjustment lens frame, 15...Adjustment plate, 15a...Slanted long hole, 17
...Fixing screw.
Claims (1)
点位置出し調整を行うレンズを保持する焦点調整
レンズ枠を前後させて、レンズの焦点位置出しを
行うレンズの焦点位置出し機構において、 上記固定枠の外周面に、光軸と直角方向にのみ
摺動するように取り付けられた焦点位置出し用の
調整板と、 この調整板に穿設された、光軸方向に対して一
定の傾きをもつ傾斜長孔と、 上記調整板に穿設された、光軸方向に対して垂
直に延びる固定用長孔と、 上記固定枠に穿設された、光軸方向のレンズ枠
移動用長孔と、 上記調整板の傾斜長孔と上記固定枠のレンズ枠
移動用長孔とを貫通して、上記焦点調整レンズ枠
にねじ込まれ、同レンズ枠を上記固定枠に対して
一体に固定する固定用ねじと、 上記調整板の固定用長孔を貫通して上記固定枠
にねじ込まれ、上記調整板を上記固定枠に対して
一体に固定する調整板固定ねじと、 を具備し、上記調整板を上記固定枠に対して周方
向に移動させることにより、上記固定用ねじを介
して、焦点調整レンズ枠を光軸方向に移動させ、
レンズの焦点位置出し調整を行うようにし、上記
固定用ねじおよび調整板固定ねじを締付けること
により焦点位置を固定するようにしたことを特徴
とする、レンズの焦点位置出し機構。[Scope of Claim for Utility Model Registration] A lens that adjusts the focal position of the lens by moving back and forth a focusing lens frame that is fitted and supported by a fixed frame of a lens barrel and holds the lens that adjusts the focal position. In the focus positioning mechanism, an adjustment plate for focus positioning is attached to the outer circumferential surface of the fixed frame so as to slide only in a direction perpendicular to the optical axis; an oblique elongated hole having a constant inclination relative to the direction of the optical axis; a fixing elongated hole drilled in the adjusting plate and extending perpendicularly to the optical axis direction; The lens frame is screwed into the focus adjustment lens frame through the long hole for moving the lens frame, the oblique long hole of the adjusting plate, and the long hole for moving the lens frame of the fixed frame, and the lens frame is attached to the fixed frame. a fixing screw that fixes the adjustment plate integrally with the fixing frame; and an adjustment plate fixing screw that passes through the long fixing hole of the adjustment plate and is screwed into the fixation frame and fixes the adjustment plate integrally with the fixation frame. moving the focusing lens frame in the optical axis direction via the fixing screw by moving the adjusting plate in the circumferential direction with respect to the fixing frame;
1. A focal position positioning mechanism for a lens, characterized in that the focal position of the lens is adjusted, and the focal position is fixed by tightening the fixing screw and the adjusting plate fixing screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7264783U JPS59178606U (en) | 1983-05-16 | 1983-05-16 | Lens focus positioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7264783U JPS59178606U (en) | 1983-05-16 | 1983-05-16 | Lens focus positioning mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178606U JPS59178606U (en) | 1984-11-29 |
| JPS6333203Y2 true JPS6333203Y2 (en) | 1988-09-05 |
Family
ID=30202782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7264783U Granted JPS59178606U (en) | 1983-05-16 | 1983-05-16 | Lens focus positioning mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178606U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243430B2 (en) * | 1973-03-20 | 1977-10-31 | ||
| JPH0713886U (en) * | 1993-08-17 | 1995-03-10 | 有限会社高橋石材工業 | Stone material carrier structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243430U (en) * | 1975-09-23 | 1977-03-28 |
-
1983
- 1983-05-16 JP JP7264783U patent/JPS59178606U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243430B2 (en) * | 1973-03-20 | 1977-10-31 | ||
| JPH0713886U (en) * | 1993-08-17 | 1995-03-10 | 有限会社高橋石材工業 | Stone material carrier structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59178606U (en) | 1984-11-29 |
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