JP2514641Y2 - Optical system magnification changer - Google Patents

Optical system magnification changer

Info

Publication number
JP2514641Y2
JP2514641Y2 JP9827987U JP9827987U JP2514641Y2 JP 2514641 Y2 JP2514641 Y2 JP 2514641Y2 JP 9827987 U JP9827987 U JP 9827987U JP 9827987 U JP9827987 U JP 9827987U JP 2514641 Y2 JP2514641 Y2 JP 2514641Y2
Authority
JP
Japan
Prior art keywords
toggle
variable power
support shaft
fixed
toggle spring
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 - Lifetime
Application number
JP9827987U
Other languages
Japanese (ja)
Other versions
JPS644412U (en
Inventor
武 無量井
貴之 内山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Original Assignee
Nikon Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nikon Corp filed Critical Nikon Corp
Priority to JP9827987U priority Critical patent/JP2514641Y2/en
Publication of JPS644412U publication Critical patent/JPS644412U/ja
Application granted granted Critical
Publication of JP2514641Y2 publication Critical patent/JP2514641Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Lens Barrels (AREA)

Description

【考案の詳細な説明】 〔考案の目的〕 (産業上の利用分野) 本考案は、光学系の変倍装置、特に内蔵エキステンダ
ー方式の光学系において変倍用レンズ系を主レンズ系に
対して挿脱して光学系の変倍を行う光学系変倍装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] (Industrial field of application) The present invention is directed to a variable power device for an optical system, particularly a variable power lens system for a main lens system in a built-in extender type optical system. The present invention relates to an optical system variable power device for changing the optical system power by inserting and removing the optical system.

(従来の技術) この種の変倍装置は、従来、例えば第5図および第6
図に示すように、鏡体31、41内の変倍レンズ系Lを保持
するレンズ保持枠32、42が操作レバー33、43の操作に応
動して、図中実線にて示す挿入位置と鎖線にて示す退避
位置との間を支持軸34、44を中心として回動し、その
際、トグル機構中のトグルばね35、45の付勢力により、
その挿入位置と退避位置に固定されるように構成されて
いる。
(Prior Art) This type of variable power device has been conventionally used, for example, in FIGS.
As shown in the figure, the lens holding frames 32 and 42 for holding the variable power lens system L in the mirror bodies 31 and 41 respond to the operation of the operation levers 33 and 43, and the insertion position and the chain line shown by the solid line in the figure. Is rotated about the support shafts 34 and 44 between the retracted position shown by and the urging force of the toggle springs 35 and 45 in the toggle mechanism,
It is configured to be fixed at the insertion position and the retracted position.

第5図の公知例においては、操作レバー33はレバー軸
36に回転可能に支持されている。また、トグルばね35の
一端はレンズ保持枠32に固定され、他端は支持軸34に回
転可能に支持されたトグルレバー37の先端部37aに固定
され、そのトグルレバー37は、ギヤ列38を介して操作レ
バー33と連動するように構成されている。第6図の公知
例においては、操作レバー43は、レバー軸46に回転可能
に支持され、そのレバー軸46の回転は、ギヤ列49を介し
てレンズ保持枠42と一体の支持軸44と第3の支持軸48に
設けられたトグルギヤ47に伝えられるように構成されて
いる。また、このトグルギヤ47にはトグルばね45の一端
45aが固設され、そのトグルばね45の付勢力によるトグ
ルギヤ47の回転力は、支持軸48上に設けられた図示され
ない摩擦制動機構により弱められ、挿脱時のレンズ保持
枠42への衝撃が緩和される。
In the known example of FIG. 5, the operating lever 33 is a lever shaft.
It is rotatably supported by 36. Further, one end of the toggle spring 35 is fixed to the lens holding frame 32, and the other end is fixed to a tip end portion 37a of a toggle lever 37 rotatably supported by a support shaft 34, and the toggle lever 37 includes a gear train 38. It is configured to interlock with the operation lever 33 via the. In the known example shown in FIG. 6, the operation lever 43 is rotatably supported by a lever shaft 46, and the rotation of the lever shaft 46 and a support shaft 44 integral with the lens holding frame 42 via a gear train 49 and a first support shaft 44. 3 is configured to be transmitted to a toggle gear 47 provided on the support shaft 48. In addition, one end of the toggle spring 45 is attached to the toggle gear 47.
45a is fixed, and the rotational force of the toggle gear 47 due to the urging force of the toggle spring 45 is weakened by a friction braking mechanism (not shown) provided on the support shaft 48, and the impact on the lens holding frame 42 during insertion / removal is prevented. Will be alleviated.

(考案が解決しようとする問題点) しかしながら、上記従来の変倍装置においては、操作
レバーを回転可能に支持する支持軸と、変倍レンズ系を
挿脱可能に支持する支持軸との少なくとも2個の軸と、
この軸を連動させるためのギヤ列等の連動機構を必要と
するため、部品数が多く、それに伴い重量が増大するば
かりでなく、変倍装置を収容する鏡体が大型化しカメラ
の小型化に逆行するという問題点が有った。さらに、第
5図の公知例においては、トグルばねの付勢力を強くす
ると挿入位置と退避位置で変倍レンズが急激に停止する
ため衝撃が大きく、弱いトグルばねを用いると、挿入位
置と退避位置における変倍レンズの安定性が悪くなる欠
点が有った。また、第5図の公知例においては、トグル
機構と、そのトグル機構中のトグルばねの付勢力を変倍
レンズの挿入位置と退避位置とにおいて抑制するための
摩擦制動機構とを、支持する別の支持軸を設けなければ
ならず、構成が複雑になり、大きいスペースを必要とす
る欠点が有った。
(Problems to be Solved by the Invention) However, in the above-described conventional variable power device, at least two of a support shaft that rotatably supports the operation lever and a support shaft that removably supports the variable power lens system. Axes,
Since a gear train or other interlocking mechanism for interlocking this shaft is required, the number of parts is large and the weight is increased accordingly, and the mirror body for accommodating the zooming device is enlarged and the camera is downsized. There was a problem of going backwards. Further, in the known example of FIG. 5, when the biasing force of the toggle spring is increased, the variable magnification lens suddenly stops at the insertion position and the retracted position, so that the impact is large, and when the weak toggle spring is used, the insertion position and the retracted position are used. However, there was a drawback that the stability of the variable power lens in 1 was deteriorated. Further, in the known example of FIG. 5, a toggle mechanism and a friction braking mechanism for suppressing the biasing force of the toggle spring in the toggle mechanism at the insertion position and the retracted position of the variable power lens are separately supported. Had to be provided with a supporting shaft, which made the structure complicated and required a large space.

本考案は、上記のような従来装置の問題点を解決し、
変倍レンズ系が衝撃を受けることなく急速に挿入位置と
退避位置とに確実に固定され、しかも部品数が少なく、
重量も軽減され、極めてコンパクトでユニット化が可能
な光学系変倍装置を提供することを目的とするものであ
る。
The present invention solves the problems of the conventional device as described above,
The variable-magnification lens system is securely fixed to the insertion position and the retracted position rapidly without being impacted, and the number of parts is small,
It is an object of the present invention to provide an optical system variable magnification device which is light in weight, is extremely compact and can be unitized.

〔考案の構成〕 (問題点を解決する為の手段) 本考案は、操作部材の正逆回転動作とその操作部材の
回転動作に応じて付勢されるトグルばねの付勢力により
変倍レンズ系を主レンズ系に対して挿脱させてレンズの
変倍を可能にする変倍装置において、変倍レンズ系を保
持するレンズ保持部材と、トグルばねの自由端を変位可
能に保持するトグル部材とを操作部材と一体に正逆回転
する回転支持軸上に設けて、その操作部材と一体に正逆
回転させると共に、操作部材の正逆各回転動作の途中か
らトグルばねの付勢力を抑制する摩擦制動手段を前記の
回転支持軸を回転可能に保持する軸受金の外周に設ける
ことを上記問題解決の手段とするものである。
[Structure of the Invention] (Means for Solving Problems) The present invention is directed to a variable power lens system by forward / reverse rotation of an operating member and a biasing force of a toggle spring that is biased according to the rotating motion of the operating member. In a variable power device capable of varying the lens size by inserting and removing the lens with respect to the main lens system, a lens holding member that holds the variable power lens system, and a toggle member that holds the free end of the toggle spring in a displaceable manner. Is provided on a rotation support shaft that rotates forward and backward integrally with the operating member, and rotates forward and backward integrally with the operating member, and friction that suppresses the biasing force of the toggle spring during each forward and reverse rotational movement of the operating member. The means for solving the above-mentioned problem is to provide the braking means on the outer circumference of the bearing metal that rotatably holds the rotary support shaft.

(作用) 正逆回転可能な操作部材(5)と、変倍レンズ系
(L)を保持するレンズ保持部材(3)と、トグルばね
(16)の自由端を変位可能に保持するトグル部材(8)
とは、共に回転支持軸(4)上に支持され、操作部材
(5)の正逆回転は、回転支持軸(4)を介して、レン
ズ保持部材(3)とトグル部材(8)とに伝えられ、こ
れ等は一体に正逆回転する。操作部材(5)の手動操作
により、トグルばね(16)の付勢力に抗して正方向(ま
たは逆方向)に回転を開始したトグル部材(8)は、そ
の回転の中途においてトグルばね(16)の付勢方向が反
転するため、トグルばね(16)はトグル部材(8)を正
回転方向(または逆転方向)に強い力で付勢し、レンズ
保持部材(3)を退避位置(または挿入位置)へ変位さ
せる。しかし、トグルばね(16)の付勢力は、操作部材
(5)と共に回転するトグル部材の回転の途中から、軸
受金(7)の外周に設けられた摩擦制動手段(12、13、
14)により抑制される。これにより、レンズ保持部材
(3)は、回転を徐々に制動されながら退避位置(また
は挿入位置)に達する。
(Operation) A forward / reverse rotatable operation member (5), a lens holding member (3) for holding the variable power lens system (L), and a toggle member (for holding the free end of the toggle spring (16) in a displaceable manner ( 8)
Are both supported on the rotation support shaft (4), and the forward and reverse rotations of the operating member (5) are transferred to the lens holding member (3) and the toggle member (8) via the rotation support shaft (4). It is transmitted and these rotate forward and backward together. The toggle member (8), which has started to rotate in the forward direction (or reverse direction) against the biasing force of the toggle spring (16) by the manual operation of the operating member (5), is in the middle of the rotation. ), The toggle spring (16) urges the toggle member (8) with a strong force in the forward rotation direction (or reverse rotation direction), and the lens holding member (3) is retracted (or inserted). Position). However, the urging force of the toggle spring (16) causes the friction braking means (12, 13 ,,) provided on the outer periphery of the bearing metal (7) from the middle of the rotation of the toggle member that rotates together with the operating member (5).
It is suppressed by 14). As a result, the lens holding member (3) reaches the retracted position (or insertion position) while the rotation is gradually braked.

上記のように、操作部材(5)、レンズ保持部材
(3)及びトグル部材(8)は、唯1個の回転支持軸
(4)によってそれぞれ支持され、摩擦制動手段(12、
13、14)もその回転支持軸(4)を保持する軸受金
(7)の外周に設けられ、レンズ保持部材(3)に保持
された変倍レンズ系(L)は、摩擦制動手段(12、13、
14)の外側を旋回して挿脱されるように構成されてい
る。従って、装置がコンパクト化され、ユニット化する
ことにより狭いスペース内でも容易に設置することがで
きる。
As described above, the operation member (5), the lens holding member (3) and the toggle member (8) are respectively supported by only one rotation support shaft (4), and the friction braking means (12,
13 and 14) are also provided on the outer periphery of the bearing metal (7) that holds the rotation support shaft (4), and the variable power lens system (L) held by the lens holding member (3) includes friction braking means (12). ,13,
It is configured so that it can be inserted and removed by turning outside of 14). Therefore, the device can be made compact and can be easily installed even in a narrow space by unitizing it.

(実施例) 次に、本考案の実施例を添付の図面に基づいて詳しく
説明する。
(Example) Next, the Example of this invention is described in detail based on an accompanying drawing.

第1図は本考案の実施例の構成を示す断面図で、第2
図は、第1図の左側面図である。第1図及び第2図にお
いて、鏡体1の内部に設けられた変倍レンズ系Lを保持
するレンズ枠2は、レンズ保持部材3に小ねじ21によっ
て固定され、そのレンズ保持部材3は回転支持軸4のフ
ランジ部4Aに小ねじ22をもって固定されている。回転支
持軸4の一端には操作レバー5が固設され、中間部分は
支持台6に小ねじ23にて固設された軸受金7に回転可能
に支持されている。また、支持台6は鏡体1に固設され
ている。回転支持軸4の他端には、トグルレバー8が軸
方向にのみ変位可能に支持され、その軸方向の位置はナ
ット9によって調整可能に構成されている。回転支持軸
4のフランジ部4Aと支持台6の右側面との間および軸受
金7とトグルレバー8との間には、間隔調整用座金10、
11が設けられている。
FIG. 1 is a sectional view showing the construction of an embodiment of the present invention.
The figure is a left side view of FIG. In FIGS. 1 and 2, the lens frame 2 for holding the variable power lens system L provided inside the mirror body 1 is fixed to the lens holding member 3 by machine screws 21, and the lens holding member 3 is rotated. It is fixed to the flange portion 4A of the support shaft 4 with a machine screw 22. An operation lever 5 is fixed to one end of the rotary support shaft 4, and an intermediate portion is rotatably supported by a bearing metal 7 fixed to a support base 6 by machine screws 23. The support base 6 is fixed to the mirror body 1. A toggle lever 8 is supported at the other end of the rotary support shaft 4 so as to be displaceable only in the axial direction, and its axial position is adjustable by a nut 9. Between the flange portion 4A of the rotary support shaft 4 and the right side surface of the support base 6 and between the bearing metal 7 and the toggle lever 8, a space adjusting washer 10,
11 are provided.

制動リング12は、軸受金7の外周に設けられた所定ピ
ッチの左ねじ7Aに螺合し、その制動リング12と軸受金7
のフランジ部7Bとの間、及び軸受金7とトグルレバー8
との間には、それぞれ摩擦制動用の圧縮ばね13及び14が
設けられている。制動リング12の外周には、円周幅が互
いに等しい3個の突起12A1,12A2,12A3が設けられ、各突
起の間にそれぞれ形成された切欠き溝12B1,12B2,12B
3は、互いに等しい所定溝幅に形成されている。その切
欠き溝12B1,12B2,12B3のうちの一つの切欠き溝12B1に挿
入された係止ピン15は、トグルレバー8の一端に固定さ
れ、その係止ピン15の他端は、レンズ保持部材3に設け
られた貫通孔3Aに嵌入している。また、支持台6の左側
面には、トグルばね(引張コイルばね)16の一端を固定
するための固定ピン17が設けられ、そのトグルばね16の
他端(自由端)は、トグルレバー8を貫通して突出する
係止ピン15の先端突起部15Aに掛止されている。
The braking ring 12 is screwed onto a left screw 7A having a predetermined pitch provided on the outer periphery of the bearing metal 7, and the braking ring 12 and the bearing metal 7 are screwed together.
Between the flange portion 7B and the bearing metal 7 and toggle lever 8
Compression springs 13 and 14 for frictional braking are provided between and. On the outer circumference of the braking ring 12, three protrusions 12A 1 , 12A 2 , 12A 3 having the same circumferential width are provided, and notch grooves 12B 1 , 12B 2 , 12B formed between the protrusions, respectively.
3 are formed to have the same predetermined groove width. Grooves 12B 1-out the cut-out, 12B 2, 12B one notched groove 12B engaging pin 15 inserted into one of the 3 is fixed to one end of the toggle lever 8, the other end of the locking pin 15 is It is fitted into a through hole 3A provided in the lens holding member 3. Further, a fixing pin 17 for fixing one end of a toggle spring (tensile coil spring) 16 is provided on the left side surface of the support base 6, and the other end (free end) of the toggle spring 16 holds the toggle lever 8. It is hooked on the tip projection 15A of the locking pin 15 which penetrates and projects.

変倍レンズ系Lが第2図中で実線で示す挿入位置にあ
るときは、レンズ枠2は鏡体1に固設された剛体のスト
ッパー18に当接し、トグルばね16の付勢力により、その
位置に確実に保持されるように構成されている。また変
倍レンズ系Lが第2図中で鎖線にて示す退避位置にある
ときは、レンズ枠2は鏡体1の1部に設けられた弾性部
材1Aに当接し、その位置に保持される。なお、トグルレ
バー8、係止ピン15およびトグルばね16をもって、レン
ズ枠2を挿入位置と退避位置とに固定するトグル機構が
構成され、また、制動リング12、圧縮ばね13、14をもっ
て、レンズ枠2の挿入位置および退避位置への変位速度
をその終点位置近傍において制動する制動機構が構成さ
れる。
When the variable power lens system L is in the insertion position shown by the solid line in FIG. 2, the lens frame 2 abuts on a rigid stopper 18 fixedly mounted on the mirror body 1, and by the biasing force of the toggle spring 16, It is configured to be held securely in position. Further, when the variable power lens system L is in the retracted position shown by the chain line in FIG. 2, the lens frame 2 contacts the elastic member 1A provided in a part of the mirror body 1 and is held at that position. . It should be noted that the toggle lever 8, the locking pin 15 and the toggle spring 16 constitute a toggle mechanism for fixing the lens frame 2 at the insertion position and the retracted position, and the braking ring 12 and the compression springs 13 and 14 make up the lens frame. A braking mechanism is configured to brake the displacement speed of the No. 2 to the insertion position and the retracted position in the vicinity of the end point position.

第1図に示す実施例は上記の如く構成されているの
で、手動操作により操作レバー5を、第2図中で回転支
持軸4を中心として時計方向に回転させると、その操作
レバー5と一体の回転支持軸4が時計方向に回転する。
これにより、回転支持軸4のフランジ4Aに固定されたレ
ンズ保持部材3を介して、レンズ枠2が回転支持軸4の
まわりを時計方向に回転する。また同時に、トグルレバ
ー8も回転支持軸4と一体に時計方向に回転する。この
レンズ保持部材3とトグルレバー8の時計方向の回転に
より、係止ピン15はトグルレバー8と一体に回転支持軸
4のまわりに旋回し、第3図に示すように、制動リング
12に形成された切欠き溝12B1の一方の溝壁12Baから離れ
て他方の溝壁12Bbに当接するまで切欠き溝12B1内を移動
する。その際、係止ピン15の先端突起15Aが第3図に示
すように固定ピン17と回転支持軸4とを結ぶ線の延長線
l上の死点に達するまでは、トグルレバー8と共にレン
ズ保持部材3は、トグルばね16により反時計方向に回動
習性を持つように付勢され、操作レバー5はそのトグル
ばね16の付勢力に抗して時計方向に回転操作される。
Since the embodiment shown in FIG. 1 is configured as described above, when the operation lever 5 is rotated clockwise around the rotation support shaft 4 in FIG. 2 by a manual operation, it is integrated with the operation lever 5. The rotation support shaft 4 of is rotated clockwise.
As a result, the lens frame 2 rotates clockwise around the rotation support shaft 4 via the lens holding member 3 fixed to the flange 4A of the rotation support shaft 4. At the same time, the toggle lever 8 also rotates clockwise together with the rotation support shaft 4. By the clockwise rotation of the lens holding member 3 and the toggle lever 8, the locking pin 15 pivots around the rotation support shaft 4 together with the toggle lever 8 and, as shown in FIG.
Apart from one groove wall 12Ba of the formed notch groove 12B 1 to 12 to move the notched groove 12B 1 until it abuts against the other groove wall 12Bb. At that time, until the tip projection 15A of the locking pin 15 reaches the dead point on the extension line l of the line connecting the fixed pin 17 and the rotation support shaft 4 as shown in FIG. The member 3 is biased by the toggle spring 16 in a counterclockwise direction so as to have a turning tendency, and the operating lever 5 is rotated clockwise against the biasing force of the toggle spring 16.

係止ピン15の先端突起15Aが固定ピン17と回転支持軸
4とを結ず延長線lを超えて、さらに時計方向に回動す
ると、トグルばね16の付勢方向が逆転し、トグルレバー
8はトグルばね16により時計方向に付勢される。これに
より、トグルレバー8と共にレンズ保持部材3は、第4
図に示すように時計方向に急速に回転して、鏡体1に設
けられた弾性部材1Aにレンズ枠2が当接する退避位置に
達する。
When the tip projection 15A of the locking pin 15 does not connect the fixed pin 17 to the rotary support shaft 4 and exceeds the extension line 1 and further rotates in the clockwise direction, the biasing direction of the toggle spring 16 reverses and the toggle lever 8 Is urged clockwise by a toggle spring 16. Thereby, the lens holding member 3 together with the toggle lever 8 moves to the fourth position.
As shown in the figure, it rapidly rotates clockwise and reaches the retracted position where the lens frame 2 comes into contact with the elastic member 1A provided on the mirror body 1.

一方、係止ピン15が固定ピン17と回転支持軸4を結ぶ
延長線lを超えて時計方向に回転すると、係止ピン15は
切欠き溝12B1の他方の溝壁12Bbに当接し、制動リング12
を第4図に示すように時計方向に回転させる。この制動
リング12は、軸受金7の外周に設けられた左ねじ7Aと螺
合している為、回転しつつ第1図中で左方へ変位し、圧
縮ばね14を圧縮する。この圧縮ばね14の圧縮により、圧
縮ばね14と制動リング12との間の摩擦力が次第に増大
し、その摩擦制動力により、トグルばね16の付勢力は弱
められ、トグルレバー8の時計方向の回転速度は急激に
低下する。これにより、レンズ枠2は強い衝撃を受ける
こと無く、鏡体1の固定部1Aに当接し、第4図中で実線
にて示すように退避位置に停止する。退避位置における
トグルばね16は、常時、トグルレバー8、回転支持軸4
を介してレンズ保持部材3を時計方向に付勢しているの
で、レンズ枠2は確実にその退避位置に保持固定され
る。
On the other hand, when the locking pin 15 rotates clockwise beyond the extension line 1 connecting the fixed pin 17 and the rotation support shaft 4, the locking pin 15 comes into contact with the other groove wall 12Bb of the cutout groove 12B 1 and brakes. Ring 12
Is rotated clockwise as shown in FIG. Since the braking ring 12 is screwed with the left screw 7A provided on the outer periphery of the bearing metal 7, the braking ring 12 is displaced leftward in FIG. 1 while rotating and compresses the compression spring 14. By the compression of the compression spring 14, the frictional force between the compression spring 14 and the braking ring 12 gradually increases, and the frictional braking force weakens the biasing force of the toggle spring 16 to rotate the toggle lever 8 in the clockwise direction. The speed drops sharply. As a result, the lens frame 2 comes into contact with the fixed portion 1A of the mirror body 1 without receiving a strong impact, and stops at the retracted position as shown by the solid line in FIG. The toggle spring 16 in the retracted position is always provided with the toggle lever 8 and the rotation support shaft 4.
Since the lens holding member 3 is urged in the clockwise direction via the, the lens frame 2 is securely held and fixed in the retracted position.

レンズ枠2を第4図に示す退避位置から第2図に示す
挿入位置へ変位させる場合には、操作レバー5を第4図
に示す位置からトグルばね16の付勢力に抗して反時計方
向に回動する。この操作レバー5の反時計方向の回動に
より、回転支持軸4を介してレンズ保持部材3とトグル
レバー8とが一体に反時計方向に回転する。トグルレバ
ー8の反時計方向の回転により、係止ピン15は反時計方
向に変位して、切欠き溝12B1の一方の溝壁12Baに当接し
て制動リング12を第4図中で反時計方向に回動する。係
止ピン15の先端突起15Aが、固定ピン17と回転支持軸4
を結ぶ延長線lを超えて反時計方向に回動すると、トグ
ルばね17の付勢力は反転して、トグルレバー8を反時計
方向へ回動するように付勢する。これにより、係止ピン
15に押圧された制動リング12は、さらに反時計方向に回
動すると共に、軸受金7の左ねじ7Aに沿って、第1図中
で右方へ変位し、圧縮ばね13を圧縮する。この圧縮ばね
13の圧縮により、制動リング12と圧縮ばね13との間の摩
擦力が次第に増大し、その摩擦制動力により、トグルレ
バー8の反時計方向の回転力が弱められる。その為、レ
ンズ枠2は衝撃を受けること無く、第2図に示すように
鏡体1のストッパー18に当接して停止する。この場合、
そのストッパー18は剛体にて形成されているので、変倍
レンズ系Lは挿入位置に正しく設定され、トグルばね16
の付勢力により確実に押圧固定される。
When the lens frame 2 is displaced from the retracted position shown in FIG. 4 to the insertion position shown in FIG. 2, the operating lever 5 is moved counterclockwise from the position shown in FIG. 4 against the biasing force of the toggle spring 16. Turn to. The rotation of the operation lever 5 in the counterclockwise direction causes the lens holding member 3 and the toggle lever 8 to integrally rotate in the counterclockwise direction via the rotation support shaft 4. Rotation of the toggle lever 8 in the counterclockwise direction causes the locking pin 15 to be displaced in the counterclockwise direction and abut against one groove wall 12Ba of the cutout groove 12B 1 to move the braking ring 12 counterclockwise in FIG. Rotate in the direction. The tip projection 15A of the locking pin 15 is fixed to the fixed pin 17 and the rotation support shaft 4.
When it is rotated counterclockwise beyond the extension line l that connects the two, the biasing force of the toggle spring 17 is reversed, and the toggle lever 8 is biased to rotate counterclockwise. This allows the locking pin
The braking ring 12 pressed by 15 further rotates counterclockwise and is displaced rightward in FIG. 1 along the left screw 7A of the bearing metal 7 to compress the compression spring 13. This compression spring
The compression of 13 gradually increases the frictional force between the braking ring 12 and the compression spring 13, and the frictional braking force weakens the counterclockwise rotational force of the toggle lever 8. Therefore, the lens frame 2 does not receive an impact and comes into contact with the stopper 18 of the mirror body 1 as shown in FIG. in this case,
Since the stopper 18 is formed of a rigid body, the variable power lens system L is correctly set at the insertion position, and the toggle spring 16
It is securely pressed and fixed by the urging force of.

なお、制動リング12の軸方向の位置(第1図中で左右
方向の位置)は、係止ピン15が挿入される切欠き溝12
B1,12B2,12B3を変えることにより変位させることができ
る。例えば、第2図中で制動リング12を反時計方向に回
転して、係止ピン15を切欠き溝13B2内に導入するように
すれば、圧縮ばね14による制動力が増大し、圧縮ばね13
の制動力は減少する。また、制動リング12を時計方向に
回転して、切欠き溝12B3内に係止ピン15が挿入されるよ
うにすると、圧縮バネ13の制動力が増大し、圧縮ばね14
の制動力を減少させることができる。さらに、圧縮ばね
14の制動力は、間隔調整用座金11の厚さを適当に変える
ことによっても変えることができる。
The axial position of the braking ring 12 (the position in the left-right direction in FIG. 1) is the notch groove 12 into which the locking pin 15 is inserted.
It can be displaced by changing B 1 , 12B 2 and 12B 3 . For example, the braking ring 12 in Figure 2 is rotated in the counterclockwise direction, when to introduce the locking pin 15 in the notched groove 13B in 2, the braking force by the compression spring 14 is increased, the compression spring 13
The braking force of is reduced. Further, the brake ring 12 rotates clockwise, the locking pin 15 to be inserted into the cutout groove 12B 3, the braking force of the compression spring 13 is increased, the compression spring 14
The braking force of can be reduced. Furthermore, compression springs
The braking force of 14 can also be changed by appropriately changing the thickness of the washer 11 for adjusting the distance.

〔考案の効果〕[Effect of device]

以上の如く本考案によれば、唯一個の回転支持軸に、
変倍レンズ系を保持するレンズ保持部材と操作レバーと
トグルレバーとを設け、その回転支持軸を保持する軸受
金の外周に制動リングと圧縮ばねを含む摩擦制動手段を
設けたので、部品数が減少し、軽量化、小型化が可能と
なり、またユニット化も容易にできるので、組立作業を
能率的に行うことができる利点が有る。また、実施例の
如く制動リングを軸受金の外周に設けたねじに螺合する
ように構成すれば、制動リングの回動の初期には制動力
を弱くし、回動の終期で最大の制動力を得ることができ
るので、変倍レンズ系を急速且つ円滑に変位させ、しか
も停止時の衝撃を十分緩和することができる利点が有
る。
As described above, according to the present invention, only one rotary support shaft
Since the lens holding member for holding the variable power lens system, the operating lever and the toggle lever are provided, and the friction braking means including the braking ring and the compression spring are provided on the outer circumference of the bearing metal holding the rotation supporting shaft, the number of parts is reduced. Since it is possible to reduce the weight, reduce the weight, downsize, and easily form a unit, there is an advantage that the assembling work can be efficiently performed. Further, if the braking ring is configured to be screwed with the screw provided on the outer circumference of the bearing metal as in the embodiment, the braking force is weakened at the initial stage of the rotation of the braking ring, and the maximum control is achieved at the final stage of the rotation. Since power can be obtained, there is an advantage that the variable power lens system can be rapidly and smoothly displaced and the impact at the time of stopping can be sufficiently mitigated.

【図面の簡単な説明】[Brief description of drawings]

第1図は本考案の実施例を示す断面図、第2図は第1図
の実施例装置の左側図面で、変倍レンズ系が挿入位置に
有る状態を示し、第3図は第1図のトグルばねの付勢方
向が逆転する死点位置まで変倍レンズ系が変位した状態
を示す作用説明図、第4図は変倍レンズ系が退避位置ま
で変位した状態を示す作用説明図、第5図及び第6図
は、それぞれ別の公知例を示す変倍装置の概略構成図で
ある。 (主要部分の符号の説明) 1……鏡体 3……レンズ保持部材 4……回転支持軸 5……操作レバー(操作部材) 6……支持台 7……軸受金 8……トグルレバー(トグル部材) L……変倍レンズ系 12……制動リング(摩擦制動手段) 13、14……圧縮ばね(摩擦制動手段) 15……係止ピン 16……トグルばね
FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a left side view of the embodiment apparatus of FIG. 1, showing a state in which a variable power lens system is at an insertion position, and FIG. 4 is an operation explanatory view showing a state in which the variable power lens system is displaced to the dead center position where the biasing direction of the toggle spring is reversed, and FIG. 4 is an explanatory view showing a state in which the variable power lens system is displaced to the retracted position. FIG. 5 and FIG. 6 are schematic configuration diagrams of a variable power device showing different known examples. (Description of symbols of main parts) 1 ... Mirror body 3 ... Lens holding member 4 ... Rotation support shaft 5 ... Operation lever (operation member) 6 ... Support base 7 ... Bearing metal 8 ... Toggle lever ( Toggle member) L ... Variable magnification lens system 12 ... Braking ring (friction braking means) 13, 14 ... Compression spring (friction braking means) 15 ... Locking pin 16 ... Toggle spring

Claims (3)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項1】操作部材の正逆回転動作と前記操作部材の
回転動作に応じて付勢されるトグルばねの付勢力とによ
り変倍レンズ系を主レンズ系に対して挿脱させてレンズ
の変倍を可能にする変倍装置において、前記変倍レンズ
系を保持するレンズ保持部材と前記トグルばねの自由端
を変位可能に保持するトグル部材とを前記操作部材と一
体に正逆回転する回転支持軸上に設けて前記操作部材と
一体に正逆回転させると共に、前記操作部材の正逆各回
転動作の途中から前記トグルばねの付勢力を抑制する摩
擦制動手段を、前記回転支持軸を回転可能に保持する軸
受金の外周に設けたことを特徴とする光学系変倍装置。
1. A variable power lens system is inserted into and removed from a main lens system by a forward / reverse rotational movement of an operating member and an urging force of a toggle spring urged according to the rotational movement of the operating member. In a variable power device capable of variable power, a lens holding member that holds the variable power lens system and a toggle member that holds the free end of the toggle spring displaceably rotate forward and backward integrally with the operating member. The rotation support shaft is provided with friction braking means that is provided on a support shaft and rotates forward and backward integrally with the operation member and that suppresses the biasing force of the toggle spring during each forward and reverse rotation operation of the operation member. An optical system variable power device characterized in that it is provided on the outer periphery of a bearing metal that holds it as much as possible.
【請求項2】前記摩擦制動手段は、前記軸受金(7)の
外周に螺合し且つ、前記操作部材(5)の正逆回転の途
中において前記トグル部材(8)と連動結合して回動す
る制動リング(12)と、前記軸受金(7)の外周に保持
され且つ前記制動リング(12)の両側面に摩擦接触する
一対の圧縮ばね(13、14)とを含むことを特徴とする実
用新案登録請求の範囲第1項記載の光学系変倍装置。
2. The friction braking means is screwed onto the outer periphery of the bearing metal (7), and is interlocked with the toggle member (8) during the forward and reverse rotation of the operating member (5) to rotate. A moving braking ring (12), and a pair of compression springs (13, 14) held on the outer periphery of the bearing ring (7) and frictionally contacting both side surfaces of the braking ring (12). The optical system variable power device according to claim 1, wherein the utility model is registered.
【請求項3】前記軸受金(7)は、鏡体(1)の固定部
に取付け可能な支持台(6)に固設され、前記トグルば
ねの固定端は前記支持台(6)に固定されていることを
特徴とする実用新案登録請求の範囲第1項記載の光学系
変倍装置。
3. The bearing metal (7) is fixed to a support base (6) which can be attached to a fixed portion of the mirror body (1), and a fixed end of the toggle spring is fixed to the support base (6). The optical system variable power device according to claim 1, characterized in that
JP9827987U 1987-06-26 1987-06-26 Optical system magnification changer Expired - Lifetime JP2514641Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9827987U JP2514641Y2 (en) 1987-06-26 1987-06-26 Optical system magnification changer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9827987U JP2514641Y2 (en) 1987-06-26 1987-06-26 Optical system magnification changer

Publications (2)

Publication Number Publication Date
JPS644412U JPS644412U (en) 1989-01-11
JP2514641Y2 true JP2514641Y2 (en) 1996-10-23

Family

ID=31324401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9827987U Expired - Lifetime JP2514641Y2 (en) 1987-06-26 1987-06-26 Optical system magnification changer

Country Status (1)

Country Link
JP (1) JP2514641Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6305174B2 (en) * 2014-04-10 2018-04-04 キヤノン株式会社 Optical equipment

Also Published As

Publication number Publication date
JPS644412U (en) 1989-01-11

Similar Documents

Publication Publication Date Title
JP2597707B2 (en) Lens barrel
JP3501176B2 (en) Lens barrel with built-in surface wave motor
JP2514641Y2 (en) Optical system magnification changer
JPS6283246A (en) Telescopic steering gear
US20210080687A1 (en) Lens device
JPH08248284A (en) Lens driving device and optical equipment using the same
US5561564A (en) Lens driving apparatus
JP3232517B2 (en) Lens barrel
JPS5929211A (en) Device for preventing natural movement of lens
US4354203A (en) Lens control mechanism for television camera
JP4047432B2 (en) Driving force switching mechanism
JPH10170795A (en) Optical lens barrel
JPH08179183A (en) Lens device
JP2717648B2 (en) Frame fixing device
JP3911230B2 (en) Power manual dual lens barrel
JPH10246849A (en) Lens barrel
JP2566957Y2 (en) Rear wheel steering system for front and rear wheel steering vehicles
JPH07114085A (en) Optical device
JP3047482B2 (en) Zoom lens barrel
JP2002148504A (en) Focusing mode switching device for camera lens
JPH09105848A (en) Lens driving device
JPS6326706B2 (en)
JP2004145038A (en) Power/manual use lens barrel
JP2561659Y2 (en) Lens barrel
JP3211910B2 (en) Hollow motor and lens barrel using the hollow motor