JPS6134483Y2 - - Google Patents
Info
- Publication number
- JPS6134483Y2 JPS6134483Y2 JP5899481U JP5899481U JPS6134483Y2 JP S6134483 Y2 JPS6134483 Y2 JP S6134483Y2 JP 5899481 U JP5899481 U JP 5899481U JP 5899481 U JP5899481 U JP 5899481U JP S6134483 Y2 JPS6134483 Y2 JP S6134483Y2
- Authority
- JP
- Japan
- Prior art keywords
- lock
- lock lever
- magnification
- projector
- zoom
- 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
- 210000000078 claw Anatomy 0.000 description 12
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
【考案の詳細な説明】
本考案は、投影機等のズームレンズに係り、特
に変倍の途中又は端などの所望の変倍位置に正確
にかつ再現性よくロツクする倍率調整機構を有す
る投影機等のズームレンズに関する。[Detailed Description of the Invention] The present invention relates to a zoom lens for a projector, etc., and in particular, a projector having a magnification adjustment mechanism that locks the zoom lens accurately and reproducibly at a desired zooming position such as the middle or end of zooming. Regarding zoom lenses such as.
投影機等においては倍率精度が高く要求される
ことがある。このような投影機等にズームレンズ
を用いる場合は、変倍の途中又は端などの所望の
位置に、ズームリングを正確にストツプさせて倍
率再現されることが必要である。倍率を所望の位
置でストツプさせる方法としては、クリツク機構
を組込むことが考えられるが、正確さや再現性の
点で満足できない。 Projectors and the like may require high magnification accuracy. When using a zoom lens in such a projector, etc., it is necessary to accurately stop the zoom ring at a desired position, such as in the middle or at the end of magnification, to reproduce the magnification. One possible method for stopping the magnification at a desired position is to incorporate a click mechanism, but this is not satisfactory in terms of accuracy and reproducibility.
本考案は、所望の変倍率が再現性よく得られる
ようにした投影機等のズームレンズの提供するこ
とを目的として成されたもので、上記目的は、
固定部材および該固定部材に対して変倍操作時
に移動される移動部材の一方にバネ部材により一
方向に付勢したロツクレバーを、他方に前記移動
部材の移動方向に沿つて、該ロツクレバーと係脱
可能な複数のロツク部を設けるとともに、前記ロ
ツクレバーの係合部およびロツク部の形状を、ロ
ツクレバーの係合部がバネ部材の付勢力により前
記ロツク部の移動部材の移動方向と交わる少くと
も１つの係合壁に押し付けられるような形状と成
し、前記ロツクレバーを複数のロツク部のうちの
１つと選択的に係合せしめることにより所望の変
倍率が得られごとく構成した倍率調整機構を有す
ることを特徴とする投影機等のズームレンズによ
り達成できる。 The present invention has been made with the aim of providing a zoom lens for a projector, etc., which allows a desired magnification ratio to be obtained with good reproducibility. A lock lever biased in one direction by a spring member is provided on one side of the movable member that is moved during the doubling operation, and a plurality of lock portions that can be engaged with and disengaged from the lock lever are provided on the other side along the moving direction of the movable member, The shape of the engaging portion of the lock lever and the lock portion is such that the engaging portion of the lock lever is pressed against at least one engaging wall that intersects with the moving direction of the moving member of the lock portion by the biasing force of the spring member. A zoom lens for a projector, etc., comprising a magnification adjustment mechanism configured such that a desired magnification can be obtained by selectively engaging the lock lever with one of a plurality of lock parts. It can be achieved.
以下図面を用いて、本考案の詳細な説明を行
う。 The present invention will be described in detail below with reference to the drawings.
第１図は本考案の一実施例の光軸方向の部分断
面図を示し、第２図は第１図の軸直角の断面Ａ，
A′矢視図を示す。 FIG. 1 shows a partial sectional view in the optical axis direction of an embodiment of the present invention, and FIG. 2 shows a cross section A perpendicular to the axis in FIG.
A' arrow view is shown.
固定筒１の内側にはレンズ群L1，L2を持つた
枠２，３がそれぞれ係合されている。また固定筒
１の外側にはカム筒４が回動自在にかつ軸方向に
は移動できないように嵌合されている。 Frames 2 and 3 having lens groups L 1 and L 2 are engaged with the inside of the fixed barrel 1, respectively. Further, a cam cylinder 4 is fitted to the outside of the fixed cylinder 1 so as to be rotatable but immovable in the axial direction.
カム筒４の外側には、ズームリング５がカム筒
４と一体となつて回動するように固定されてい
る。このズームリング５を回動させることにより
カム筒４が一体に回転し、カム筒４に切られたカ
ム溝（図示せず）及び固定筒１に切られた溝（図
示せず）を枠３に取付けたピン（図示せず）が摺
動することにによつてレンズ群L2が所定の移動
を行い変倍が行われる。以上述べたところはズー
ムレンズにおいて一般に使われる構造である。 A zoom ring 5 is fixed to the outside of the cam barrel 4 so as to rotate integrally with the cam barrel 4. By rotating this zoom ring 5, the cam barrel 4 rotates together, and the cam groove (not shown) cut in the cam barrel 4 and the groove (not shown) cut in the fixed barrel 1 are connected to the frame 3. By sliding a pin (not shown) attached to the lens group L2, the lens group L2 moves in a predetermined manner and magnification is changed. The structure described above is generally used in zoom lenses.
溝コマ６にはロツク爪の飛込む溝６ａと円周方
向の長穴６ｂとがあり、溝コマ６は固定筒１に円
周方向の長穴６ｂを介してビス７によつて固定さ
れる。従つて、溝６ａの固定筒１での円周方向位
置は調整が可能となつている。 The grooved piece 6 has a groove 6a into which a lock pawl is inserted and a circumferential elongated hole 6b, and the grooved piece 6 is fixed to the fixed cylinder 1 with screws 7 through the circumferential elongated hole 6b. Therefore, the circumferential position of the groove 6a on the fixed cylinder 1 can be adjusted.
ズームリング５には、先端にロツク爪部８ａを
もつたロツクレバー８がピン９を回動軸として軸
支される。またロツクレバー８の爪部８ａと反対
側の端には指先でロツクするためのボタン１０が
固定される。またロツクレバー８の爪部８ａ側に
はバネ１１が爪が常に鏡胴中心方向に付勢される
ように取付けられる。 A lock lever 8 having a lock claw portion 8a at its tip is pivotally supported on the zoom ring 5 with a pin 9 as a rotation axis. Further, a button 10 for locking with a fingertip is fixed to the end of the lock lever 8 opposite to the claw portion 8a. Further, a spring 11 is attached to the claw portion 8a side of the lock lever 8 so that the claw is always biased toward the center of the lens barrel.
したがつて、爪部８ａが溝６ａに嵌入した状態
ではズームリング５は固定筒１に締結され回動不
可であり、ボタン１０を押し込めば爪部８ａは溝
６ａから外れ、締結が解除されて変倍可能とな
る。このときボタン１０をはなせば爪部８ａはバ
ネ１１によつて付勢されてコマ６の上面に当る。
更にこの状態からズームリング５を回すと、第３
図ａ又は第３図ｂのようにして溝部６ａに爪部８
ａが飛び込み、第３図ｃの状態に落着く。 Therefore, when the claw portion 8a is fitted into the groove 6a, the zoom ring 5 is fastened to the fixed barrel 1 and cannot be rotated, and when the button 10 is pushed in, the claw portion 8a comes off from the groove 6a and the fastening is released. It becomes possible to change the magnification. At this time, when the button 10 is released, the claw portion 8a is urged by the spring 11 and comes into contact with the top surface of the top 6.
Further, if you turn the zoom ring 5 from this state, the third
The claw portion 8 is inserted into the groove portion 6a as shown in Figure a or Figure 3b.
a jumps in and settles into the state shown in Figure 3 c.
爪部８ａと溝部６ａの形状を第３図に示すよう
な傾斜面を付けるときは、第３図ａの如く左側か
ら爪が回つて来たときには、溝６ａの右側斜面に
一度当つてから第３図ｃの状態に落着く。また右
側から爪が回つて来たときは、第３図ｂの状態を
経て第３図ｃの状態に落着く。従つて図示した形
状の爪と溝の関係にあるときは、第３図ｃ示の状
態に嵌入する直前の最終段階では常にズームリン
グ５は左側への僅かの回転を余儀なくされる。 When the shape of the claw part 8a and the groove part 6a is to have an inclined surface as shown in FIG. 3, when the claw comes from the left side as shown in FIG. It settles into the state shown in Figure 3c. When the claw comes around from the right side, it goes through the state shown in Fig. 3b and then settles into the state shown in Fig. 3c. Therefore, when the claw-groove relationship is in the shape shown, the zoom ring 5 is always forced to rotate slightly to the left in the final stage just before entering the state shown in FIG. 3c.
以上説明したように、ロツクレバー８をロツク
部である溝が形成された溝コマ６に向けて付勢す
るバネ１１を設け、バネ１１の力でロツクレバー
８がコマ６の傾斜面をもつた溝６ａを係合壁とし
て押付けられるような形状に形作ることよつて、
ズームリング５は設定した変倍位置に正確にかつ
再現性よく停止させロツクすることとなる。 As explained above, the spring 11 is provided which biases the lock lever 8 toward the groove piece 6, which is the locking portion, in which the groove is formed. By shaping it into a shape that can be pressed as an engagement wall,
The zoom ring 5 is stopped and locked at the set magnification change position accurately and with good reproducibility.
本考案は、次の効果を有する。 The present invention has the following effects.
(1) ロツク機構なので、位置決めが確実であり、
不用意にセツトした倍率位置からずれることが
ない。(1) Lock mechanism ensures reliable positioning.
The magnification will not be inadvertently shifted from the set magnification position.
(2) 押ボタン操作だけで設定した倍率のロツク解
除ができるので、挿作が簡単である。(2) The set magnification can be unlocked by simply pressing a button, making insertion easy.
(3) 新たに設けた倍率調整機構は構造が単純で組
立て調整が容易である。(3) The newly installed magnification adjustment mechanism has a simple structure and is easy to assemble and adjust.
(4) 溝のコマを複数個、任意の位置に取付けられ
るので、変倍の範囲内で所望の位置に係止させ
るようにすることができる。(4) Since a plurality of grooved pieces can be attached to any desired position, it is possible to lock the lens at a desired position within the range of magnification change.
(5) 溝のコマは長穴内で円周方向に位置調整が可
能なので、設計値に対しての諸々の誤差の異積
による位置のずれが調整可能である。(5) Since the position of the groove piece can be adjusted in the circumferential direction within the elongated hole, it is possible to adjust the positional deviation due to the different products of various errors with respect to the design value.
(6) ロツク爪及び溝形状に適当な傾斜面を付ける
ことにより、機械的誤差（ガタ・バツクラツシ
ユ）を除去し、セツトした倍率につき正確さと
再現性が保持される。(6) By adding an appropriate slope to the lock pawl and groove shape, mechanical errors (backlash and backlash) are eliminated and accuracy and reproducibility are maintained for the set magnification.
第１図は、本考案実施例の軸平行断面図を示し
第２図は軸直角断面を示す。第３図は溝と爪との
係合作業状態を示す部分図である。
１……固定筒、５……ズームリング、６……溝
コマ、６ａ……ロツク溝、６ｂ……長穴、８……
ロツクレバー、８ａ……ロツク爪、９……ピン、
１０……ボタン、１１……バネ。
FIG. 1 is an axis-parallel cross-sectional view of an embodiment of the present invention, and FIG. 2 is an axis-perpendicular cross-section. FIG. 3 is a partial view showing the state of engagement between the groove and the pawl. 1...Fixed tube, 5...Zoom ring, 6...Groove piece, 6a...Lock groove, 6b...Elongated hole, 8...
Lock lever, 8a...Lock claw, 9...Pin,
10...button, 11...spring.
Claims (1)
時に移動される移動部材の一方にバネ部材によ
り一方向に付勢したロツクレバーを、他方に前
記移動部材の移動方向に沿つて、該ロツクレバ
ーと係脱可能な複数のロツク部を設けるととも
に、前記ロツクレバーの係合部およびロツク部
の形状を、ロツクレバーの係合部がバネ部材の
付勢力により前記ロツク部の移動部材の移動方
向と交わる少くとも１つの係合壁に押し付けら
れるような形状と成し、前記ロツクレバーを、
複数のロツク部のうちの１つと選択的に係合せ
しせることにより所望の変倍率が得られるごと
く構成した倍率調整機構を有することを特徴と
する投影機等のズームレンズ。 ２ 前記移動部材はズームリングである実用新案
登録請求の範囲第１項記載の投影機等のズーム
レンズ。 ３ 前記移動部材はカムリングである実用新案登
録請求の範囲第１項記載の投影機等のズームレ
ンズ。 ４ 前記複数のロツク部は、それぞれ異なつた部
材に形成された溝により構成されており、かつ
該部材は移動部材の移動方向に対して調整可能
である実用新案登録請求の範囲第１項乃至３項
記載の投影機等のズームレンズ。[Claims for Utility Model Registration] 1. A lock lever biased in one direction by a spring member on one side of a fixed member and a movable member that is moved with respect to the fixed member during a magnification change operation, and a lock lever on the other hand that is biased in one direction by a spring member. A plurality of lock parts that can be engaged with and disengaged from the lock lever are provided along the lock lever, and the shape of the engaging part of the lock lever and the lock part is changed so that the engaging part of the lock lever can be moved by the moving member of the lock part by the biasing force of the spring member. The lock lever is shaped so as to be pressed against at least one engagement wall that intersects with the direction of movement of the lock lever,
1. A zoom lens for a projector, etc., characterized by having a magnification adjustment mechanism configured to obtain a desired magnification ratio by selectively engaging one of a plurality of lock parts. 2. A zoom lens for a projector or the like according to claim 1, wherein the moving member is a zoom ring. 3. A zoom lens for a projector or the like according to claim 1, wherein the moving member is a cam ring. 4. The plurality of lock portions are each constituted by a groove formed in a different member, and the member is adjustable with respect to the moving direction of the moving member. Zoom lenses for projectors, etc. as described in Section 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5899481U JPS6134483Y2 (en) | 1981-04-22 | 1981-04-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5899481U JPS6134483Y2 (en) | 1981-04-22 | 1981-04-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57170108U JPS57170108U (en) | 1982-10-26 |
| JPS6134483Y2 true JPS6134483Y2 (en) | 1986-10-07 |
Family
ID=29855384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5899481U Expired JPS6134483Y2 (en) | 1981-04-22 | 1981-04-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6134483Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6070052B2 (en) * | 2012-10-23 | 2017-02-01 | 株式会社ニコン | Lens barrel and imaging device |
-
1981
- 1981-04-22 JP JP5899481U patent/JPS6134483Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57170108U (en) | 1982-10-26 |
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