JPH0365521B2 - - Google Patents
Info
- Publication number
- JPH0365521B2 JPH0365521B2 JP23890283A JP23890283A JPH0365521B2 JP H0365521 B2 JPH0365521 B2 JP H0365521B2 JP 23890283 A JP23890283 A JP 23890283A JP 23890283 A JP23890283 A JP 23890283A JP H0365521 B2 JPH0365521 B2 JP H0365521B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- inner cylinder
- hole
- outer cylinder
- flange
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は、レンズ鏡胴、特に距離調節リン
グ、ズームリング等の外部から操作される移動筒
の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in lens barrels, particularly movable barrels that are operated from the outside, such as distance adjustment rings and zoom rings.
(従来技術)
一般にレンズ鏡胴において、撮影のために必要
な距離を調節するためにダブルヘリコイド機構を
用いることは知られている。(Prior Art) It is generally known that a double helicoid mechanism is used in a lens barrel to adjust the distance required for photographing.
即ち第1図に示す如くレンズL1,L2を保持す
る保持筒は左右に可動で、固定筒7に固着されて
いる案内キー9によつて直線的に動くようにガイ
ドされる。1は距離調節用外筒(外部操作環、以
下単に外筒という)であり、固定筒7に対して回
動可能であるとともに光軸方向に沿つても移動可
能である。外筒1にはフランジ4が形成され、ネ
ジ、ビス等の固定手段6によつて内筒2のフラン
ジ3に固定されている。内筒2の内外周面にはヘ
リコイドが形成されており、各々は固定筒9の内
周面とレンズ保持筒8の外周面とのヘリコイド
と、第1ヘリコイド結合12と第2ヘリコイド結
合13を形成する。 That is, as shown in FIG. 1, the holding cylinder holding the lenses L 1 and L 2 is movable left and right, and is guided by a guide key 9 fixed to the fixed cylinder 7 so as to move linearly. Reference numeral 1 denotes a distance adjustment outer cylinder (external operation ring, hereinafter simply referred to as outer cylinder), which is rotatable with respect to the fixed cylinder 7 and also movable along the optical axis direction. A flange 4 is formed on the outer cylinder 1, and is fixed to the flange 3 of the inner cylinder 2 with fixing means 6 such as screws or screws. Helicoids are formed on the inner and outer circumferential surfaces of the inner tube 2, and each helicoid connects the inner circumferential surface of the fixed tube 9 and the outer circumferential surface of the lens holding tube 8, and the first helicoid coupling 12 and the second helicoid coupling 13. Form.
従つて外筒1を回動させると、内筒2も同時に
回動し、固定筒7は固定されているので第1ヘリ
コイド結合12に従つて外筒1及び内筒2は光軸
方向に沿つて移動する。同時に保持筒8は案内キ
ー9によつて回転不可能であるので、第2ヘリコ
イド結合13に従つて光軸方向に動きレンズL1,
L2の位置が調節される。外筒1の端表面には外
筒1の回転角度による撮影距離を表示する目盛
(数m〜∞)が通常刻まれ、固定筒7の表面には
これらの距りを示すための指標が刻まれ、このよ
うな機構によつてレンズの撮影距離を明確に表示
している。このような機構において外筒1の目盛
の位置、つまり撮影距離(例えば∞)とレンズ
L1,L2の実際の位置(∞にあう位置でなければ
ならない)とは正確に一致しなければならない。
このため外筒1は内筒2に対して調節可能な固定
機構となつており、組立る時に微調整する。 Therefore, when the outer tube 1 is rotated, the inner tube 2 is also rotated at the same time, and since the fixed tube 7 is fixed, the outer tube 1 and the inner tube 2 are rotated along the optical axis direction according to the first helicoid coupling 12. Move along. At the same time, since the holding cylinder 8 cannot be rotated by the guide key 9, it moves in the optical axis direction according to the second helicoid coupling 13 and the lenses L 1 ,
The position of L 2 is adjusted. The end surface of the outer tube 1 is usually engraved with a scale (several meters to infinity) that indicates the photographing distance depending on the rotation angle of the outer tube 1, and the surface of the fixed tube 7 is engraved with an index to indicate these distances. Rarely, such a mechanism clearly indicates the shooting distance of the lens. In such a mechanism, the position of the scale on the outer cylinder 1, that is, the shooting distance (for example, ∞) and the lens
The actual positions of L 1 and L 2 (which must match ∞) must match exactly.
For this reason, the outer cylinder 1 has an adjustable fixing mechanism with respect to the inner cylinder 2, and is finely adjusted during assembly.
第2図のa〜fはそのための機構の従来例を示
すものである。 2A to 2F show conventional examples of mechanisms for this purpose.
図2−aの従来例では外筒1の内面に高さの低
いフランジ4を形成し、一方内筒2の外周に高さ
の高いフランジ3を設けこのフランジ3に複数個
のネジあるいはビス6を植え、このネジ6を締め
ることによつてネジ頭部6aでフランジ4の内周
面を押えて外筒1と内筒2を固着するものであ
る。図2−bの従来例は外筒1のフランジ4に長
孔5を設けネジ6をこの長孔5内で微調整自在と
したものである。図2−cの従来例は外筒1の周
方向に長孔15を設け、内筒1のフランジ3の周
面にネジ6を嵌め、これを締めることによつてネ
ジ頭部6aで内筒2と外筒1を固着するものであ
る。図2−dの従来例は外筒1にネジ孔9を設
け、これに剣先ビス6′のようなもので内筒1を
フランジ3(表面にローレツト又はV溝を付ける
こともある)に締めつけることによつて固定する
ものである。図2−eの従来例は外筒1を前部
1′と後部1″に2分割し内筒2のフランジ3を狭
むようにし、この時外筒1′,1″及びフランジ3
の外周面が同一の高さになるようにする。そして
接着テープ16等でこれらをとめることによつて
固定するものである。図2−fは図2−bの従来
例において環状の補強材17を介してネジ6によ
つて外筒1の内筒2を固定する例である(特開昭
54−103026号公報)。 In the conventional example shown in FIG. 2-a, a low-height flange 4 is formed on the inner surface of the outer cylinder 1, while a high-height flange 3 is provided on the outer periphery of the inner cylinder 2, and a plurality of screws or screws 6 are attached to the flange 3. By tightening the screw 6, the screw head 6a presses the inner circumferential surface of the flange 4, thereby fixing the outer cylinder 1 and the inner cylinder 2. In the conventional example shown in FIG. 2B, an elongated hole 5 is provided in the flange 4 of the outer cylinder 1, and the screw 6 can be finely adjusted within the elongated hole 5. In the conventional example shown in FIG. 2-c, a long hole 15 is provided in the circumferential direction of the outer cylinder 1, a screw 6 is fitted to the circumferential surface of the flange 3 of the inner cylinder 1, and the screw head 6a is tightened to connect the inner cylinder with the screw head 6a. 2 and the outer cylinder 1. In the conventional example shown in Fig. 2-d, a screw hole 9 is provided in the outer cylinder 1, and the inner cylinder 1 is tightened to the flange 3 (sometimes with a knurl or V groove on the surface) using something like a tip screw 6'. In particular, it is fixed. In the conventional example shown in FIG.
so that the outer peripheral surfaces of the two are at the same height. These are then fixed by fastening them with adhesive tape 16 or the like. FIG. 2-f shows an example in which the inner cylinder 2 of the outer cylinder 1 is fixed with a screw 6 via an annular reinforcing member 17 in the conventional example shown in FIG.
54-103026).
以上のように従来においては種々の方法で外筒
1と内筒2を調節自在に固定していたがいずれの
場合も次のような欠点があつた。 As described above, in the past, the outer cylinder 1 and the inner cylinder 2 have been adjustably fixed using various methods, but each method has the following drawbacks.
1 外筒を取付けもしくは位置調節を行なう場
合、特に図2a,b,fの場合、必ず取付ビス
の前方にある部品を取除くかもしくは取付ける
前に行なわなければならない。1. When installing or adjusting the position of the outer cylinder, especially in the case of Figures 2a, b, f, it must be done before removing or installing the parts in front of the mounting screws.
2 剣先ビスを用いた場合、ビス先端が強い回転
動力でズレる場合がある。2. When using a sword tip screw, the tip of the screw may become misaligned due to strong rotational force.
3 図2−a〜eの場合外筒1、内筒2のいずれ
もプラスチツク成形部品で構成すると、ネジ、
取付ビスの締込みによる歪みが内筒2にまで影
響を及ぼし、作動機能に支障を及ぼす。3 In the case of Figs. 2-a to 2-e, if both the outer cylinder 1 and the inner cylinder 2 are made of plastic molded parts, the screws,
Distortion due to tightening of the mounting screws affects the inner cylinder 2 and impedes its operating function.
4 内筒を取付ける前に外筒を既に組入れておか
なければならない。4. The outer cylinder must already be assembled before installing the inner cylinder.
5 図2a〜dの何れかの方法で一度調整した
後、再微調整をする必要がある時、最初の調整
によつてビス締付けによる圧痕があるため、再
微調整が困難である。5. When it is necessary to fine-tune again after once adjusting by any of the methods shown in FIGS. 2a to 2d, it is difficult to make fine-tune again because there is an indentation caused by the screw tightening caused by the first adjustment.
6 図2−fは前記欠点が除去出来るが内筒のフ
ランジの穴3aと環状補強部材17の穴17a
を合わせなければならず取付けに余計な工程を
要する。6 In FIG. 2-f, the above-mentioned defects can be removed, but the hole 3a in the flange of the inner cylinder and the hole 17a in the annular reinforcing member 17
must be matched, requiring an extra process for installation.
上記の問題は距離調節リングに限らず、ズーム
リング等、内筒と外筒を結合する必要のある場合
には常に生じるものである。 The above-mentioned problem is not limited to distance adjustment rings, but always occurs when it is necessary to connect an inner cylinder and an outer cylinder, such as a zoom ring.
(発明の目的)
この発明は以上のような従来の欠点を解消する
もので、組立て、調整が簡単でかつネジのしめ込
み等による部品の歪みを発生させることなく外筒
と内筒とを固定する手段を提供するものである。(Objective of the Invention) This invention solves the above-mentioned conventional drawbacks, and is capable of fixing an outer cylinder and an inner cylinder by making assembly and adjustment easy, and without causing distortion of parts due to tightening of screws, etc. It provides a means to do so.
(発明の構成) 以下図面に基づいて本発明を説明する。(Structure of the invention) The present invention will be explained below based on the drawings.
1は外筒で2が内筒であり内筒2にはフランジ
3が設けられている。外筒1には段溝18a,1
8bを有する孔18が少くとも1つ設けられ、内
筒2のフランジ3にはこの孔18に対応した数の
穴19が設けられている。20は孔18の段部に
座る頭部20bと穴19に嵌合する足部20aを
有するコマである。孔18は長孔としても良い。 1 is an outer cylinder, 2 is an inner cylinder, and the inner cylinder 2 is provided with a flange 3. The outer cylinder 1 has stepped grooves 18a, 1
At least one hole 18 having a diameter 8b is provided, and the flange 3 of the inner cylinder 2 is provided with holes 19 in a number corresponding to this hole 18. 20 is a top having a head 20b that sits on the step of the hole 18 and a foot 20a that fits into the hole 19. The hole 18 may be a long hole.
このような装置において、外筒1を内筒2にま
ず嵌合させる。次にコマ20をその足部20aが
内筒2のフランジ3の穴19に嵌入させる。する
と頭部20bは孔18の段部に乗り、頭部20b
の頂面は外筒1の外周面と同一高さの面となる。
さらにその上を粘着テープ21によつて固定する
ことによつて外筒1は内筒2と固定される。 In such a device, the outer cylinder 1 is first fitted into the inner cylinder 2. Next, the leg portion 20a of the top 20 is inserted into the hole 19 of the flange 3 of the inner cylinder 2. Then, the head 20b rides on the stepped part of the hole 18, and the head 20b
The top surface of is at the same height as the outer peripheral surface of the outer cylinder 1.
Furthermore, the outer tube 1 is fixed to the inner tube 2 by fixing the top thereof with an adhesive tape 21.
(発明の効果)
この方法によると、
(1) 部品をほとんど外さずに粘着テープ21をは
がすことによつて外筒1の内筒2に対する取付
位置が調整できる。従つて全ての部品を組立て
た後に内外筒の固定位置を調整できる。(Effects of the Invention) According to this method, (1) the attachment position of the outer tube 1 to the inner tube 2 can be adjusted by peeling off the adhesive tape 21 without removing most of the parts; Therefore, the fixing positions of the inner and outer cylinders can be adjusted after all the parts are assembled.
(2) 嵌合部19,18a,20a及び18b,2
0bさらに19,20aの径嵌合部は互いの部
品のガタを無くし保持するだけで良く1,20
の固定は粘着テープ21をはり、つけるだけで
すむため特に各部品が合成樹脂等の軟かい材料
を用いた場合でも、取付けによる変形がない。(2) Fitting parts 19, 18a, 20a and 18b, 2
0b Furthermore, the diameter fitting portions 19 and 20a need only be held together by eliminating play between the parts 1 and 20.
The fixing can be done by simply applying and attaching the adhesive tape 21, so there is no deformation due to attachment, especially if each part is made of soft material such as synthetic resin.
(3) 孔18が長孔であればコマ20の位置ずらし
て微調整が行える。(3) If the hole 18 is a long hole, fine adjustment can be made by shifting the position of the piece 20.
(4) 穴19は単純な穴でありネジ部分が無いた
め、タツプ加工等の手間が不要であり、部品加
工上からも便利である。(4) Since the hole 19 is a simple hole and does not have a threaded part, it does not require the effort of tapping, etc., and is convenient from the viewpoint of parts processing.
(5) 粘着テープ19の剪断強さは十分にあり操作
中に剪断することはまずない。(5) The adhesive tape 19 has sufficient shear strength and is unlikely to be sheared during operation.
等の利点があるものである。It has the following advantages.
第3図においてはコマ20の頭部20bは四角
形であるが、要は18bと20bが嵌合しさえす
ればどのような形状でも良く(第4図の例)また
コマ20の頭部20bは平坦であつても良いが外
筒1の形状にあわせて曲面とすれば(第5図)よ
り良いことは明らかであろう。 In Fig. 3, the head 20b of the top 20 is square, but the point is that it can have any shape as long as 18b and 20b fit together (example in Fig. 4). It may be flat, but it is clear that it is better to have a curved surface to match the shape of the outer cylinder 1 (FIG. 5).
さらにコマ20は第3〜5図のように単独のも
のでなくてとも良く、例えば図6a〜dのように
種々の形状のベルト状でも良い。このようにする
と部品点数が減り部品管理からも有利である。 Further, the top 20 does not have to be a single piece as shown in FIGS. 3 to 5, but may be in the form of a belt of various shapes, for example, as shown in FIGS. 6a to 6d. This reduces the number of parts and is advantageous in terms of parts management.
以上のように本発明の機構によれば内筒と操作
環等である、外筒の固定が精確に且つ調整自在に
簡単に行え、しかも組立時に歪みが発生しない。 As described above, according to the mechanism of the present invention, the inner cylinder and the outer cylinder, such as the operating ring, can be easily and accurately fixed, and no distortion occurs during assembly.
第1図及び第2図は従来の内外筒の固定装置、
第3図は本発明に係る内外筒の固定装置、第4,
5,6図は本発明に用いるコマの実施例
L1,L2:レンズ、1:外筒(距離調節環)、
2:内筒、3:内筒のフランジ、4:外筒のフラ
ンジ、5:長孔、6:ビス、7:固定筒、8:レ
ンズ保持筒、9:案内キー、10:枠、11:固
定ネジ、12:第1ヘリコイド結合、13:第2
ヘリコイド結合、15:外筒の長孔、16:接着
テープ、17:補強環、18:孔、18a,b:
段溝、19:穴、20:コマ、20a:コマ足
部、20b:コマ頭部、21:粘着テープ。
Figures 1 and 2 show a conventional fixing device for inner and outer cylinders;
FIG. 3 shows the fixing device for the inner and outer cylinders according to the present invention;
Figures 5 and 6 show examples of frames used in the present invention L 1 , L 2 : Lens, 1 : Outer cylinder (distance adjustment ring),
2: Inner cylinder, 3: Flange of inner cylinder, 4: Flange of outer cylinder, 5: Long hole, 6: Screw, 7: Fixed cylinder, 8: Lens holding cylinder, 9: Guide key, 10: Frame, 11: Fixing screw, 12: 1st helicoid connection, 13: 2nd
Helicoid connection, 15: Outer cylinder long hole, 16: Adhesive tape, 17: Reinforcement ring, 18: Hole, 18a, b:
Step groove, 19: hole, 20: piece, 20a: piece foot, 20b: piece head, 21: adhesive tape.
Claims (1)
有するレンズ鏡胴において、操作環は段部を有す
る孔を複数有し、内筒は該孔と対応する位置に穴
を複数有し、さらに頭部が操作環の上記孔の段部
に密に嵌合し、足部が内筒の上記穴に密に嵌合す
るコマと、コマと操作環とを固定する粘着テープ
とからなる内筒と操作環の固定装置。1. In a lens barrel having an operation ring and an inner cylinder that moves together with the operation ring, the operation ring has a plurality of holes having stepped portions, and the inner cylinder has a plurality of holes at positions corresponding to the holes. , further comprising a piece whose head part fits tightly into the stepped part of the hole of the operating ring and whose foot part fits tightly into the hole of the inner cylinder, and an adhesive tape which fixes the piece and the operating ring. Fixing device for the inner cylinder and operating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23890283A JPS60130709A (en) | 1983-12-20 | 1983-12-20 | Fixing device for internal tube and external tube of lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23890283A JPS60130709A (en) | 1983-12-20 | 1983-12-20 | Fixing device for internal tube and external tube of lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60130709A JPS60130709A (en) | 1985-07-12 |
| JPH0365521B2 true JPH0365521B2 (en) | 1991-10-14 |
Family
ID=17036964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23890283A Granted JPS60130709A (en) | 1983-12-20 | 1983-12-20 | Fixing device for internal tube and external tube of lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60130709A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2568500B2 (en) * | 1986-01-28 | 1997-01-08 | 松下電器産業株式会社 | Lens barrel |
| JP6711097B2 (en) * | 2016-04-15 | 2020-06-17 | 株式会社シグマ | Lens barrel |
-
1983
- 1983-12-20 JP JP23890283A patent/JPS60130709A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60130709A (en) | 1985-07-12 |
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