JPH0328422Y2

JPH0328422Y2 -

Info

Publication number: JPH0328422Y2
Application number: JP5335781U
Authority: JP
Priority date: 1981-04-14
Filing date: 1981-04-14
Publication date: 1991-06-19
Also published as: JPS57167407U

Description

【考案の詳細な説明】本考案はフイルター等の付属品の緩み防止装置
に関する。[Detailed Description of the Invention] The present invention relates to a loosening prevention device for accessories such as filters.

カメラ用交換レンズ、レンズ組み込みカメラ、
工業用テレビカメラのレンズ鏡胴等にフイルタ
ー・ガラス・補助レンズ等を着脱自在に設けて撮
影条件に合わせて付属品の交換・装着を行なう光
学機器がある。 Interchangeable lenses for cameras, cameras with built-in lenses,
There is an optical device in which a filter, glass, auxiliary lens, etc. are removably attached to the lens barrel of an industrial television camera, and the accessories can be replaced or attached according to the shooting conditions.

このような場合に各種のフイルター・ガラス・
補助レンズ等の付属品をフイルター保持粋等の付
属品保持体にネジ込み、付属部保持体を前記光学
機器の鏡胴部に装着する。 In such cases, various filters, glasses,
An accessory such as an auxiliary lens is screwed into an accessory holder such as a filter holder, and the accessory holder is attached to the lens barrel of the optical device.

付属品は付属品保持体に対し交換可能に構成す
る必要があり、多くの場合ネジ込み形式がその構
造の簡単さ、取り付け取り外しの容易さから採用
される。しかし付属品と付属品保持体の両者にそ
れぞれ雄ネジ・雌ネジと形成した場合には付属品
保持体に付属品とネジ込み固定後、前記鏡胴部に
付属品保持体を装着し、撮影行為等を行なうと振
動等により付属品が緩るんでくる問題点が生じ
た。第１図において、フイルター１を付属品保持
体２にネジ部１ａ，２ａにてネジ込み固定し、付
属品保持体２を鏡胴部に装着後フイルター１がゆ
るむとフイルター１は第１図に示す点線位置の方
向にずれる。このためフイルター１を交換のため
付属品保持体２をレンズ鏡胴部３から取り外そう
としても取り出せない事態が生ずる。 Accessories must be configured to be replaceable with respect to the accessory holder, and in many cases a screw-in type is adopted because of its simple structure and ease of installation and removal. However, if both the accessory and accessory holder are formed with male and female threads, respectively, screw the accessory into the accessory holder and fix it, then attach the accessory holder to the lens barrel and take a picture. A problem has arisen in which the accessories come loose due to vibrations, etc. when performing activities. In Fig. 1, the filter 1 is screwed into the accessory holder 2 using threaded parts 1a and 2a, and if the filter 1 is loosened after attaching the accessory holder 2 to the lens barrel, the filter 1 will be as shown in Fig. 1. It shifts in the direction of the dotted line position shown. Therefore, even if an attempt is made to remove the accessory holder 2 from the lens barrel section 3 in order to replace the filter 1, a situation arises in which the filter 1 cannot be removed.

本考案は上述の問題を解決するために付属品保
持体２とフイルター１の間に緩み防止作用を働か
せることにより上述の事態を回避可能な装置を提
供することを目的とする。 SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention aims to provide a device that can prevent the above-mentioned situation by exerting a loosening prevention effect between the accessory holder 2 and the filter 1.

第２図ａ，ｂ，ｃは本考案の第１の実施例を示
し、図において２は付属品保持体であり円環状の
フイルター保持体２ｂ，ネジ部２ａ，鏡胴への装
着のための把手部２ｃ，フイルター保持体２ｂと
把手部２ｃを援ぐ腕部２ｄ等から成る。 Figures 2a, b, and c show the first embodiment of the present invention, and in the figures, 2 is an accessory holder, including an annular filter holder 2b, a threaded portion 2a, and a threaded part 2a for attachment to the lens barrel. It consists of a handle part 2c, a filter holder 2b, an arm part 2d supporting the handle part 2c, etc.

４は矢印方向に押下可能なボタン、５はボタン
４の押下げによつて図面の縦面の裏面方向に移動
するロツク部材であり、ボタン４とロツク部材５
等によつてロツク手段を構成し、付属品保持体２
を鏡胴の前述開口部３ａ内に挿入したときに鏡胴
の胴部の内周部内に前記ロツク部材が進入して付
属品保持体２をレンズ鏡胴３にロツクするもので
ある。前記腕部２ｄには付属品保持体２の重量を
軽減するために切り抜き部２e₁，２e₂を設けてあ
る。６はバネ部材であり、該バネ部材６は第２図
ｂに示すように前記切り抜き部２e₂内に納められ
ており、その一端はビス７によつて固定されてい
る。バネ部材６はくの字又はへの字形状に曲げら
れており、自由端にはピン８（係合ピン）が取り
付けられている。前記係合ピン８は切り抜き部２
e₂と円環部２ｂを連通する貫通孔２ｆ内に進入し
ている。９は前記切り抜き部２e₂内にて第２図ａ
に示す位置から第２図ｃに示す位置に移動可能な
操作部材であり、該操作部材は前記バネ部材６を
挟んだ断面コの字形状又はローマ字のＬ字形状を
している。（第３図参照）上記構成の実施例装置の操作について説明す
る。付属品保持体２にフイルターを取り付ける時
には第２図ａに示すように操作部材９を図示左方
向に移動させる。すると、操作部材９の保持面９
ａにそのバネ性で押し付けられているバネ部材６
の由端端は固定端を中心に略時計方向に反り返り
係合ピン８はフイルター１の枠の外周に形成した
ネジ部から遠ざかる。この状態でフイルター１を
付属品保持体２の円環部の内周に形成したネジ部
２ａにネジ込む。次に操作部材９を第２図ｃに図
示する如く図示上右側に移動させる。これにより
バネ部材６はくの字形状に折曲されており、又、
自由端が第２図ｃの矢印方向に附勢されているの
で係合ピン８の先端は前記貫通孔２ｆを通してフ
イルター枠の外周上のネジ部に押圧される。（第
２図ｄ参照）従つて第２図ｃの状態で付属品保持体２を鏡胴
の開口部３ａに挿入後、振動等が生じてもフイル
ター１は緩るむことがなくなる。 4 is a button that can be pressed in the direction of the arrow; 5 is a locking member that moves toward the vertical back side of the drawing when the button 4 is pressed;
etc. constitutes a locking means, and the accessory holder 2
When the accessory holder 2 is inserted into the opening 3a of the lens barrel, the locking member enters into the inner periphery of the body of the lens barrel and locks the accessory holder 2 to the lens barrel 3. The arm portion 2d is provided with cutout portions 2e ₁ and 2e ₂ in order to reduce the weight of the accessory holder 2. Reference numeral 6 denotes a spring member, and the spring member 6 is housed in the cutout portion 2e ₂ as shown in FIG. 2b, and one end of the spring member 6 is fixed with a screw 7. The spring member 6 is bent into a dogleg or dogleg shape, and a pin 8 (engaging pin) is attached to the free end. The engagement pin 8 has a cutout portion 2
It enters into the through hole 2f that communicates e ₂ with the annular portion 2b. 9 is inside the cutout part 2e ₂ as shown in FIG. 2a.
The operating member is movable from the position shown in FIG. 2 to the position shown in FIG. (See FIG. 3) The operation of the embodiment apparatus having the above configuration will be explained. When attaching the filter to the accessory holder 2, the operating member 9 is moved to the left in the figure as shown in FIG. 2a. Then, the holding surface 9 of the operating member 9
A spring member 6 is pressed against a by its spring properties.
The distal end thereof is bent approximately clockwise around the fixed end, and the engaging pin 8 moves away from the threaded portion formed on the outer periphery of the frame of the filter 1. In this state, the filter 1 is screwed into the threaded portion 2a formed on the inner periphery of the annular portion of the accessory holder 2. Next, the operating member 9 is moved to the right in the drawing as shown in FIG. 2c. As a result, the spring member 6 is bent into a dogleg shape, and
Since the free end is biased in the direction of the arrow in FIG. 2c, the tip of the engagement pin 8 is pressed against the threaded portion on the outer periphery of the filter frame through the through hole 2f. (See FIG. 2d) Therefore, after inserting the accessory holder 2 into the opening 3a of the lens barrel in the state shown in FIG. 2c, the filter 1 will not loosen even if vibration or the like occurs.

第４図ａ，ｂは本考案の第２の実施例を示し、
把手部１０ａ・フイルター等をネジ込むネジ部１
０ｃを有する円環部１０ｂ，接続部１０ｄ等から
付属品保持体は成り立つており、符号４，５は前
述のロツク装置である。接続部１０ｄには窪み部
１０ｅを設け、係止部材１１はその一端１１ａを
支点にして回動可能にビス止めされている。 FIGS. 4a and 4b show a second embodiment of the present invention,
Handle part 10a, threaded part 1 into which filter etc. are screwed
The accessory holder is made up of an annular portion 10b having a diameter 0c, a connecting portion 10d, etc., and numerals 4 and 5 are the aforementioned locking devices. A recessed portion 10e is provided in the connecting portion 10d, and the locking member 11 is fixed with a screw so as to be rotatable about one end 11a thereof.

付属品保持体の円環部１０ｂにフイルターをね
じ止めした後、係止部材１１を第４図ｂに示す矢
印方向に倒してフイルターのゆるみをロツクをか
けて保持体１０をレンズ鏡胴３に装着することに
より振動等による緩みを防ぐことができる。 After screwing the filter to the annular portion 10b of the accessory holder, tilt the locking member 11 in the direction of the arrow shown in FIG. 4b to lock the filter, and then attach the holder 10 to the lens barrel 3. By installing it, you can prevent loosening due to vibration etc.

[Brief explanation of the drawing]

第１図は従来技術の説明図。第２図ａ〜ｄは本
考案の第１の実施例を示し、第２図ａはフイルタ
ー等の付属品保持体の平面図。第２図ｂは第２図
ａのA₁−A₂方向断面図。第２図ｃは本実施例の
使用状態を説明するための平面図。第２図ｄは第
２図ｃの要部断面図。第３図は操作部材９とバネ
６の配置関係を示す斜視図。第４図ａ，ｂは第２
の実施例を示し、第４図ａは第４図ｂのA₁−A₂
方向の断面図。第４図ｂは平面図。２…付属品保持体、６…バネ部材、８…係合ピ
ン、９…操作部材。 FIG. 1 is an explanatory diagram of the prior art. FIGS. 2a to 2d show a first embodiment of the present invention, and FIG. 2a is a plan view of a holder for accessories such as a filter. FIG. 2b is a sectional view in the A ₁ -A ₂ direction of FIG. 2a. FIG. 2c is a plan view for explaining the usage state of this embodiment. FIG. 2d is a sectional view of the main part of FIG. 2c. FIG. 3 is a perspective view showing the arrangement relationship between the operating member 9 and the spring 6. Figure 4 a and b are the second
Fig. 4a shows an example of A ₁ -A ₂ of Fig. 4b.
A cross-sectional view of the direction. FIG. 4b is a plan view. 2... Accessory holder, 6... Spring member, 8... Engagement pin, 9... Operation member.

Claims

[Scope of Claim for Utility Model Registration] In an insert filter holder in which a filter holder with a filter attached is inserted into an insertion slot provided in a photographic lens, a filter holding part 2b and a handle part 2c that screw in and hold the filter
A cutout 2e ₂ and a through hole 2f penetrating from the cutout 2e ₂ to the filter holding portion _2b are provided in the arm 2d that joins the spring. An engaging member 8 is provided which fixes the member 6 and presses the filter through the through hole 2f to the spring member, and which moves between the fixed side and the free end side of the spring member within the cutout _2e2 . An operating member 9 is provided, and when the operating member is moved to the fixed side, the urging force of the spring member is applied to press the engaging member 8 against the filter through the through hole 2f to prevent loosening, and the operation An insert filter holder characterized in that the pressure contact of the engaging member 8 is released by moving the member to the free end.