JP5610272B2

JP5610272B2 - Lens barrel, imaging device, and information device

Info

Publication number: JP5610272B2
Application number: JP2010105987A
Authority: JP
Inventors: 山野　透; 透山野
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2014-10-22
Anticipated expiration: 2030-04-30
Also published as: JP2011237471A

Description

本発明は、いわゆる沈胴式のレンズ鏡胴に係り、特に一つの形態では複数のレンズ群の少なくとも一部を沈胴して収納し、他の一つの形態では複数のレンズ群の少なくとも一部を所定位置まで繰り出して使用するとともに、複数のレンズ群を相対的に移動させて焦点距離を変更するズームレンズに好適なレンズ鏡胴、撮像装置および情報装置に関するものである。 The present invention relates to a so-called collapsible lens barrel. In particular, in one embodiment, at least a part of a plurality of lens groups is retracted and stored, and in another embodiment, at least a part of the plurality of lens groups is predetermined. The present invention relates to a lens barrel, an imaging device, and an information device suitable for a zoom lens that is used by being extended to a position and relatively moving a plurality of lens groups to change a focal length.

ディジタルカメラ等の撮像装置においては、撮像画像の高画質化、つまり焦点距離変更可能なズームレンズ等の撮像レンズの高性能化およびユーザの要求による小型化等の進展に伴い、撮影時以外にレンズ鏡筒の少なくとも一部が撮像装置本体内に収納される、いわゆる沈胴式の撮影レンズを用いるものが増加している。さらには、単なる小型化ではなく、より一層の薄型化の要求により、沈胴収納状態でのレンズ鏡胴部分の厚み寸法を極限にまで減らすことが重要となってきている。
しかしながら、レンズ鏡胴を沈胴式にすると各レンズ枠や筒体の重層段数が増加し、各段間の可動部分の遊びの累積によってレンズ間の光軸方向の移動位置や各光軸位置の誤差が拡大し、撮像された画像の画質が落ちてしまう。また、遊びが多いと撮像装置の向きによっても撮像される画質の低下が生じてしまう。
すなわち、沈胴式のレンズ系等のように、各群がそれぞれ１つ以上のレンズからなる複数のレンズ群の少なくとも一部を光軸方向に沿って進退移動する場合には、移動を可能とするために、各群間の可動部分に、ある程度の遊びが存在する。レンズ群の数が多くなり、レンズ群の動作が複雑になればなるほど、レンズ保持枠のみならず、カム筒、回転筒やライナー部材（直進筒）等の相対的に移動する可動部分の数が増え、レンズ系全体での遊びの大きさが累積的に大きくなる。そのため、撮影状態においてレンズ系を伸長した状態でレンズ系の少なくとも一部が本来の光軸に対して傾斜してしまったり、レンズ群相互間の光軸位置のずれを生じたりすることによって、予定した光学性能を維持することができなくなるおそれがある。 In an imaging device such as a digital camera, a lens other than at the time of shooting has been developed along with the progress of higher image quality of captured images, that is, higher performance of an imaging lens such as a zoom lens capable of changing the focal length and downsizing according to user requirements. An increasing number of lenses use so-called collapsible photographic lenses in which at least a part of the lens barrel is housed in the main body of the imaging device. Furthermore, it is important not only to reduce the size but also to reduce the thickness of the lens barrel portion in the retracted state to the limit due to the demand for further thinning.
However, if the lens barrel is retracted, the number of layers of each lens frame and cylinder increases, and the movement of the movable part between each stage accumulates errors in the optical axis direction between the lenses and errors in each optical axis position. Enlarges and the quality of the captured image is degraded. In addition, when there is a lot of play, the image quality that is picked up may be reduced depending on the orientation of the image pickup apparatus.
That is, in the case where at least a part of a plurality of lens groups each composed of one or more lenses moves forward and backward along the optical axis direction, such as a retractable lens system, the movement is enabled. Therefore, there is a certain amount of play in the movable part between each group. As the number of lens groups increases and the operation of the lens groups becomes more complicated, the number of movable parts that move relatively, such as not only the lens holding frame, but also the cam cylinder, rotating cylinder, liner member (straight advance cylinder), etc. As a result, the amount of play in the entire lens system increases cumulatively. Therefore, when the lens system is extended in the shooting state, at least a part of the lens system is inclined with respect to the original optical axis, or the optical axis position is shifted between the lens groups. It may become impossible to maintain the optical performance.

しかも、これらの傾斜の大きさおよび傾斜方向が、そのレンズ系を用いている撮像装置の向き（構え方）、すなわち横位置（横持ち）か、縦位置（縦持ち）か、どちらの向きの縦位置（縦持ち）か、などによって変動し、レンズ系が本来有している光学性能を充分に発揮することができないことがある。
また、撮影状態から沈胴状態とするのに、レンズ系の一部を光軸外に退避させ、それによって空いた光軸上の空間を利用して他のレンズを収容して沈胴効果を高めて沈胴状態とするレンズ系も開発されている。このレンズ系では、沈胴状態から撮影状態とするのに、沈胴状態から光軸上のレンズ群を撮影位置に移動させ、それによって空いた光軸上の空間に光軸外に退避していた一部のレンズ系を進入させ全体の光軸位置を揃えて撮影状態とする。このようなレンズ系においては、光軸内と光軸外との間で移動する１つ以上のレンズからなるレンズ群を保持するレンズ保持枠が、光軸上での移動のみのレンズ系に関する可動部分の動作範囲に比して三次元的に広い範囲で動作することとなる。このように光軸方向以外の方向の移動を伴うため、光軸位置のずれ、あるいは光軸に直交する方向の遊びが大きくなりがちであり、可動部分の遊びの大きさが方向によって異なったり、レンズ系の向きやレンズ系の移動方向によっては弱い力で光軸位置のずれを生じたりするおそれもある。 Moreover, the magnitude and direction of these tilts are the orientation of the imaging device using the lens system (how to hold it), that is, either the horizontal position (horizontal holding) or the vertical position (vertical holding). Depending on whether it is in the vertical position (held vertically) or the like, the optical performance inherent in the lens system may not be fully exhibited.
In order to change from the shooting state to the retracted state, a part of the lens system is retracted outside the optical axis, and the space on the free optical axis is accommodated to accommodate other lenses to enhance the retractable effect. A retractable lens system has also been developed. In this lens system, the lens group on the optical axis is moved from the retracted state to the shooting position to move from the retracted state to the shooting position, thereby retracting outside the optical axis to a space on the vacant optical axis. The entire lens system is made to enter and the entire optical axis position is aligned to obtain a shooting state. In such a lens system, a lens holding frame that holds a lens group composed of one or more lenses that move between the optical axis and the optical axis is movable with respect to the lens system that moves only on the optical axis. The operation is performed in a three-dimensionally wider range than the operation range of the part. Since this involves movement in a direction other than the optical axis direction, the deviation of the optical axis position, or the play in the direction perpendicular to the optical axis tends to increase, and the size of the play of the movable part differs depending on the direction, Depending on the direction of the lens system and the moving direction of the lens system, the optical axis position may be shifted by a weak force.

そのため、各レンズ群間の遊び、いわゆるガタ、の影響を抑制するための構造が、特許文献１（特開２００７−１１４５３３号）および特許文献２（特開２００９−２４４６１３号）等に開示されている。
特許文献１（特開２００７−１１４５３３号）には、直進するライナーに設けられたカムフォロワを、撮影状態にあるときにのみ、光軸に直交する方向に付勢して、各レンズ群間の遊びの影響を低減する板バネを設ける構造が示されている。この構造は、光軸に直交する方向に付勢するため、各レンズ群の可動部の遊びが大きい場合には、レンズ群相互間の光軸位置のずれが特定方向に偏ることが懸念される。
特許文献２（特開２００９−２４４６１３号）には、撮像レンズ系のレンズ群間に光軸方向にバネを張設し、各レンズ群を光軸方向について互いに近接させる方向に付勢する構造が示されている。この構造は、レンズ群数、すなわち沈胴段数が少なく、相対的な移動ストロークが小さい場合には、効果的であるが、レンズ群数、すなわち沈胴段数が多くなると、相対的な移動ストロークが大きくなり、バネによる付勢力の変動が大きくなる。そのため、バネで付勢しているレンズ群間の距離が大きくなった場合に、バネの張力による付勢力が著しく大きくなり、レンズ群の移動に対する抵抗が大きくなると共に常時付勢力が与えられていることから、駆動源となるモータの電力消費が増大するという問題がある。 Therefore, structures for suppressing the influence of play between the lens groups, so-called looseness, are disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2007-114533), Patent Document 2 (Japanese Patent Laid-Open No. 2009-244613), and the like. Yes.
In Patent Document 1 (Japanese Patent Laid-Open No. 2007-114533), a cam follower provided on a linearly traveling liner is urged in a direction orthogonal to the optical axis only when in a photographing state to play between each lens group. The structure which provides the leaf | plate spring which reduces the influence of this is shown. Since this structure urges in a direction perpendicular to the optical axis, there is a concern that the deviation of the optical axis position between the lens groups may be biased in a specific direction when the play of the movable part of each lens group is large. .
Patent Document 2 (Japanese Patent Laid-Open No. 2009-244613) has a structure in which a spring is stretched between the lens groups of the imaging lens system in the direction of the optical axis, and each lens group is biased in the direction of approaching each other in the optical axis direction. It is shown. This structure is effective when the number of lens groups, that is, the number of retracted steps is small and the relative movement stroke is small, but as the number of lens groups, that is, the number of retracted steps increases, the relative moving stroke increases. The fluctuation of the urging force due to the spring increases. Therefore, when the distance between the lens groups biased by the spring is increased, the biasing force due to the tension of the spring is remarkably increased, the resistance to the movement of the lens group is increased, and the constantly biasing force is given. For this reason, there is a problem in that the power consumption of the motor as the drive source increases.

上述したように、多段の沈胴鏡胴においては、複数の筒体間の遊びによる影響を抑制する付勢力を必要な状態でのみ作用させ且つ付勢力の変動幅を小さくして、複数の筒体間の遊びによる影響を効果的に抑制して、沈胴によるコンパクト化を充分に達成しつつ、撮影状態におけるレンズ群の位置および姿勢を適切に規制して良好な画質を得るようにすることが要望されている。
本発明は、上述した事情に鑑みてなされたもので、遊びによる影響を抑制するための付勢力を、小さな変動幅でしかも沈胴状態では作用しないようにして、駆動電力を著しく増大させることなく、沈胴によるコンパクト化を充分に達成しつつ、簡単な構成で撮影状態におけるレンズ群の位置および姿勢を適切に規制して良好な画質を得ることを可能とするレンズ鏡胴、撮像装置および情報装置を提供することを目的としている。
本発明の請求項１の目的は、光軸方向に沿って移動する少なくとも３つ以上の複数の筒体について、簡単な構成で撮影状態における筒体間の遊びによる影響を抑制し、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質の向上を可能とし、特に、複数の筒体間に安定して付勢力を作用させて、付勢力の変動幅を抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。 As described above, in a multi-stage collapsible lens barrel, the urging force that suppresses the influence of play between the plurality of cylinders is applied only in a necessary state, and the fluctuation range of the urging force is reduced, so that the plurality of cylinders It is necessary to effectively control the position and posture of the lens group in the shooting state and obtain good image quality while effectively reducing the influence of play between the lenses and achieving a compact size by retracting. Has been.
The present invention has been made in view of the circumstances described above, and the urging force for suppressing the influence due to play does not act in a retracted state with a small fluctuation range, without significantly increasing the driving power, A lens barrel, an imaging device, and an information device capable of obtaining a good image quality by appropriately regulating the position and posture of a lens group in a shooting state with a simple configuration while sufficiently achieving a compact size by retracting It is intended to provide.
An object of claim 1 of the present invention is to suppress the influence of play between cylinders in a shooting state with a simple configuration for at least three or more cylinders moving along the optical axis direction, and at the time of collapse The lens performance can be improved and the quality of the acquired image can be improved without increasing the size . In particular, the urging force can be stably applied between the multiple cylinders to suppress the fluctuation range of the urging force, and the movable part. It is an object of the present invention to provide a lens barrel that suppresses the influence of play due to play and suppresses the deviation of the optical axes of a plurality of photographing lens groups and improves the image quality of the image pickup .

本発明の請求項２の目的は、特に、沈胴状態と撮影状態との間で、光軸方向に沿って移動し且つ相互間で相対的に移動する複数の筒体間の可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項３の目的は、特に、複数の筒体間に作用させる付勢力の変動幅を抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項４の目的は、特に、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。 The object of claim 2 of the present invention is, in particular, by play of a movable part between a plurality of cylinders that move along the optical axis direction and move relative to each other between the retracted state and the photographing state. An object of the present invention is to provide a lens barrel that suppresses the influence of backlash and suppresses the deviation of the optical axes of a plurality of photographing lens groups to improve the image pickup image quality .
The object of the third aspect of the present invention is to suppress the fluctuation range of the urging force acting between the plurality of cylinders, to suppress the influence of play due to play of the movable part, and to shift the optical axes of the plurality of photographing lens groups. It is an object of the present invention to provide a lens barrel that can improve the image quality by suppressing the image pickup.
The object of claim 4 of the present invention is to effectively suppress fluctuations in the urging force acting between the plurality of cylinders, to suppress the influence of play due to play of the movable part, and to provide the optical axes of the plurality of photographing lens groups. It is an object of the present invention to provide a lens barrel that can improve the image quality by suppressing the deviation.

本発明の請求項５の目的は、特に、簡単な構成で且つ狭い占有スペースで、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項６の目的は、特に、簡単で且つ簡易な構成で、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項７の目的は、特に、簡易で且つ安定な構成で、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項８の目的は、特に、撮影状態でのみ複数の筒体間に付勢力を作用させてしかもその変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。 The object of claim 5 of the present invention is to suppress the fluctuation of the urging force acting between a plurality of cylinders in a simple configuration and a small occupied space, and to suppress the influence of play due to play of the movable part. Another object of the present invention is to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axes of a plurality of photographing lens groups.
The object of claim 6 of the present invention is to suppress the fluctuation of the urging force acting between a plurality of cylinders with a simple and simple configuration, and to suppress the influence of play due to play of the movable part, An object of the present invention is to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axes of a plurality of photographing lens groups.
The object of claim 7 of the present invention is to suppress the fluctuation of the urging force that acts between a plurality of cylinders with a simple and stable configuration, to suppress the influence of play due to play of the movable part, An object of the present invention is to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axes of a plurality of photographing lens groups.
The object of claim 8 of the present invention is to apply an urging force between a plurality of cylinders only in a shooting state, and to suppress the fluctuation effectively, to suppress the influence of play due to the play of the movable part. It is an object of the present invention to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axis of the taking lens group.

本発明の請求項９の目的は、特に、撮影状態で複数の筒体間にほぼ一定の付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項１０の目的は、特に、複数の筒体間に安定に付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項１１の目的は、特に、複数の筒体間に安定に付勢力を作用させて、可動嵌合部分の遊びによるガタの影響を効果的に抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項１２の目的は、特に、外観を阻害することなく、複数の筒体間に付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。
本発明の請求項１３の目的は、特に、回転筒体とライナー部材間に付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制して撮像画質を向上させることを可能とするレンズ鏡胴を提供することにある。 The object of the ninth aspect of the present invention is to suppress the influence of play due to play of the movable part by applying a substantially constant urging force between the plurality of cylinders in the photographing state, and the light of the plurality of photographing lens groups. It is an object of the present invention to provide a lens barrel that can improve the image quality by suppressing axial misalignment.
The object of claim 10 of the present invention is to suppress the influence of play due to play of the movable part by applying a stable urging force between the plurality of cylinders, and to shift the optical axes of the plurality of photographing lens groups. An object of the present invention is to provide a lens barrel that can suppress and improve image quality.
The object of the eleventh aspect of the present invention is to suppress the influence of play due to play of the movable fitting portion by particularly applying a stable urging force between the plurality of cylinders, and An object of the present invention is to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axis.
The object of the twelfth aspect of the present invention is to suppress the influence of play caused by the play of the movable part by exerting an urging force between the plurality of cylinders without impairing the appearance. An object of the present invention is to provide a lens barrel that can improve the image quality by suppressing the deviation of the optical axis.
The object of the thirteenth aspect of the present invention is to apply an urging force between the rotating cylinder and the liner member in particular to suppress the influence of play due to play of the movable part, and to shift the optical axes of the plurality of photographing lens groups. An object of the present invention is to provide a lens barrel that can suppress and improve image quality.

本発明の請求項１４の目的は、特に、レンズ鏡胴の光軸方向に沿って移動する複数のレンズ群について、簡単な構成で撮影状態における複数の筒体間の遊びによる影響を抑制し、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質の向上を可能とする撮像装置を提供することにある。
本発明の請求項１５の目的は、特に、カメラ機能部のレンズ鏡胴の光軸方向に沿って移動する複数のレンズ群について、簡単な構成で撮影状態における複数の筒体間の遊びによる影響を抑制し、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質の向上を可能とする情報装置を提供することにある。 An object of claim 14 of the present invention is to suppress the influence of play between a plurality of cylinders in a shooting state with a simple configuration, particularly for a plurality of lens groups that move along the optical axis direction of the lens barrel, An object of the present invention is to provide an imaging apparatus capable of improving the lens performance and improving the quality of an acquired image without increasing the size when retracted.
The object of the fifteenth aspect of the present invention is, in particular, the influence of play between a plurality of cylinders in a shooting state with a simple configuration for a plurality of lens groups moving along the optical axis direction of a lens barrel of a camera function unit. It is an object of the present invention to provide an information device that can improve lens performance and image quality of an acquired image without increasing the size of the retracted lens.

請求項１に記載した本発明に係るレンズ鏡胴は、上述した目的を達成するために、
各群がそれぞれ１つ以上のレンズからなる複数のレンズ群の少なくとも１つのレンズ群を保持する少なくとも１つのレンズ枠と、前記少なくとも１つの前記レンズ枠の外周および内周の少なくとも一方に配置された少なくとも３つの筒体を有し、前記少なくとも３つの筒体のうちの少なくとも１つを回転筒体とし、前記回転筒体を回転させて、該回転筒体を光軸方向に沿って移動させ、前記レンズ群およびレンズ枠の少なくとも一部を沈胴させて前記レンズ群を収納する沈胴状態から前記レンズ群およびレンズ枠の少なくとも一部を繰り出して対物側へ移動させて撮影状態とするレンズ鏡胴において、
前記回転筒体の内側および外側のいずれか一方に、前記３つの筒体のうちの他の筒体として、前記回転筒体と相対的に回転可能で且つ光軸方向については前記回転筒体と一体的に直進移動するとともに、前記レンズ枠および前記３つの筒体以外の筒体の少なくとも１つの相対的な回転を規制する直進溝を有するライナー部材を具備し、前記ライナー部材の筒状部分に光軸方向に延びる貫通溝を設け、前記ライナー部材の前記貫通溝部分には、前記回転筒体の回転に伴って前記ライナー部材に対して相対的に光軸方向に沿って移動する前記３つの筒体のその他の筒体と前記回転筒体との間に光軸方向についての付勢力を与える付勢部材を備え、
前記付勢部材は、付勢力を発生するバネと、このバネを受け且つ前記ライナー部材に対し光軸方向に沿って相対的に移動するバネ受け部材とを有して構成されていることを特徴としている。 In order to achieve the above-described object, a lens barrel according to the present invention described in claim 1 is provided.
Each group is disposed on at least one lens frame that holds at least one lens group of a plurality of lens groups each composed of one or more lenses, and at least one of an outer periphery and an inner periphery of the at least one lens frame. Having at least three cylinders, at least one of the at least three cylinders as a rotating cylinder, rotating the rotating cylinder, and moving the rotating cylinder along the optical axis direction; In a lens barrel that retracts at least a part of the lens group and the lens frame and retracts at least a part of the lens group and the lens frame from a retracted state in which the lens group is accommodated and moves the lens group and the lens frame to the objective side to obtain a photographing state. ,
Either one of the inner side and the outer side of the rotary cylinder, as another cylinder of the three cylinders, the rotary cylinder is rotatable relative to the rotary cylinder and the optical axis direction is the rotation cylinder. A liner member having a rectilinear groove that linearly moves integrally and restricts relative rotation of at least one of the cylinders other than the lens frame and the three cylinders; A through-groove extending in the optical axis direction is provided, and the three through-groove portions of the liner member move along the optical axis direction relative to the liner member as the rotating cylinder rotates. A biasing member that applies a biasing force in the optical axis direction between the other cylindrical body of the cylindrical body and the rotating cylindrical body ;
Said biasing member, wherein a spring that generates a biasing force, that you have constructed a spring receiving member moves relatively along the optical axis direction with respect to and the liner member receiving the spring It is said.

請求項２に記載した本発明に係るレンズ鏡胴は、請求項１のレンズ鏡胴であって、
前記付勢部材は、前記ライナー部材の内側および外側の少なくとも一方に配置される前記回転筒体および前記その他の筒体を相対的に光軸方向に付勢することを特徴としている。
請求項３に記載した本発明に係るレンズ鏡胴は、請求項１のレンズ鏡胴であって、
前記バネ受け部材は、前記ライナー部材の貫通溝に沿って光軸方向に移動可能であることを特徴としている。
請求項４に記載した本発明に係るレンズ鏡胴は、請求項１または請求項３のレンズ鏡胴であって、
前記バネ受け部材は、前記回転筒体および前記その他の筒体のいずれか一方に形成されたカム溝に嵌合するカムフォロワを有することを特徴としている。 A lens barrel according to a second aspect of the present invention is the lens barrel according to the first aspect,
The biasing member biases the rotating cylinder and the other cylinders disposed on at least one of the inner side and the outer side of the liner member relatively in the optical axis direction .
Lens barrel according to the present invention has been described in 請 Motomeko 3, a lens barrel according to claim 1,
The spring receiving member is characterized in that it can move in the optical axis direction along the through groove of the liner member.
The lens barrel according to the present invention described in claim 4 is the lens barrel according to claim 1 or 3 ,
The spring receiving member has a cam follower that fits into a cam groove formed in one of the rotating cylinder and the other cylinder.

請求項５に記載した本発明に係るレンズ鏡胴は、請求項１のレンズ鏡胴であって、
前記バネは、板バネであることを特徴としている。
請求項６に記載した本発明に係るレンズ鏡胴は、請求項１のレンズ鏡胴であって、
前記バネは、圧縮コイルバネであることを特徴としている。
請求項７に記載した本発明に係るレンズ鏡胴は、請求項５または請求項６のレンズ鏡胴であって、
前記バネは、一端が前記バネ受け部材に固定されていることを特徴としている。
請求項８に記載した本発明に係るレンズ鏡胴は、請求項１〜請求項７のいずれか１項のレンズ鏡胴であって、
前記付勢部材は、沈胴状態では、前記回転筒体と前記その他の筒体の少なくとも一方に接触せず、付勢力を発生しないが、撮影状態では、前記回転筒体と前記その他の筒体の両方に当接して前記回転筒体と前記その他の筒体を光軸方向に相対的に付勢することを特徴としている。 A lens barrel according to a fifth aspect of the present invention is the lens barrel according to the first aspect ,
The spring is a leaf spring.
A lens barrel according to a sixth aspect of the present invention is the lens barrel according to the first aspect ,
The spring is a compression coil spring.
A lens barrel according to a seventh aspect of the present invention is the lens barrel according to the fifth or sixth aspect ,
One end of the spring is fixed to the spring receiving member.
A lens barrel according to the present invention described in claim 8 is the lens barrel according to any one of claims 1 to 7 ,
In the retracted state, the urging member does not contact at least one of the rotating cylinder and the other cylinder and does not generate an urging force. The rotating cylinder and the other cylinders are biased relatively in the optical axis direction in contact with both.

請求項９に記載した本発明に係るレンズ鏡胴は、請求項１〜請求項８のいずれか１項のレンズ鏡胴であって、
前記付勢部材は、撮影状態では、前記ライナー部材および前記回転筒体に対する前記その他の筒体の光軸方向の相対移動に、ほぼ同一の移動速度で追随して光軸方向に相対移動することを特徴としている。
請求項１０に記載した本発明に係るレンズ鏡胴は、請求項１〜請求項９のいずれか１項のレンズ鏡胴であって、
前記付勢部材は、同一円周上に少なくとも２つ設けることを特徴としている。
請求項１１に記載した本発明に係るレンズ鏡胴は、請求項１〜請求項１０のいずれか１項のレンズ鏡胴であって、
前記ライナー部材と前記回転筒体とは、ヘリコイド嵌合していることを特徴としている。
請求項１２に記載した本発明に係るレンズ鏡胴は、請求項４のレンズ鏡胴であって、
前記カム溝は、有底溝からなる有底カムであることを特徴としている。 A lens barrel according to a ninth aspect of the present invention is the lens barrel according to any one of the first to eighth aspects,
In the photographing state, the biasing member follows the relative movement in the optical axis direction of the other cylindrical body with respect to the liner member and the rotating cylindrical body, and moves relative to the optical axis direction at substantially the same moving speed. It is characterized by.
A lens barrel according to a tenth aspect of the present invention is the lens barrel according to any one of the first to ninth aspects,
At least two urging members are provided on the same circumference.
The lens barrel according to the present invention described in claim 11 is the lens barrel according to any one of claims 1 to 10 ,
The liner member and the rotary cylinder are helicoid-fitted.
A lens barrel according to the present invention described in claim 12 is the lens barrel according to claim 4 ,
The cam groove is a bottomed cam composed of a bottomed groove.

請求項１３に記載した本発明に係るレンズ鏡胴は、請求項４のレンズ鏡胴であって、
前記その他の筒体は、前記回転筒体に連動して回転し、前記ライナー部材に対して相対的に光軸方向に沿って移動する他の回転筒体であることを特徴としている。
請求項１４に記載した本発明に係る撮像装置は、
撮像用光学系として、請求項１〜請求項１３のいずれか１項のレンズ鏡胴を用いた光学系を含むことを特徴としている。
請求項１５に記載した本発明に係る情報装置は、
カメラ機能部を有し、且つ前記カメラ機能部の撮像用光学系として、請求項１〜請求項１２のいずれか１項のレンズ鏡胴を用いた光学系を含むことを特徴としている。 The lens barrel according to the present invention described in claim 13 is the lens barrel according to claim 4 ,
The other cylindrical body is another rotating cylindrical body that rotates in conjunction with the rotating cylindrical body and moves along the optical axis direction relative to the liner member.
An image pickup apparatus according to the present invention described in claim 14 is:
The imaging optical system includes an optical system using the lens barrel according to any one of claims 1 to 13 .
An information device according to the present invention described in claim 15 is
It has a camera function unit, and the imaging optical system of the camera functional unit, is characterized by including the claims 1 optical system using a lens barrel of any one of claims 12.

すなわち、本発明の請求項１のレンズ鏡胴によれば、
各群がそれぞれ１つ以上のレンズからなる複数のレンズ群の少なくとも１つのレンズ群を保持する少なくとも１つのレンズ枠と、前記少なくとも１つの前記レンズ枠の外周および内周の少なくとも一方に配置された少なくとも３つの筒体を有し、前記少なくとも３つの筒体のうちの少なくとも１つを回転筒体とし、前記回転筒体を回転させて、該回転筒体を光軸方向に沿って移動させ、前記レンズ群およびレンズ枠の少なくとも一部を沈胴させて前記レンズ群を収納する沈胴状態から前記レンズ群およびレンズ枠の少なくとも一部を繰り出して対物側へ移動させて撮影状態とするレンズ鏡胴において、
前記回転筒体の内側および外側のいずれか一方に、前記３つの筒体のうちの他の筒体として、前記回転筒体と相対的に回転可能で且つ光軸方向については前記回転筒体と一体的に直進移動するとともに、前記レンズ枠および前記３つの筒体以外の筒体の少なくとも１つの相対的な回転を規制する直進溝を有するライナー部材を具備し、前記ライナー部材の筒状部分に光軸方向に延びる貫通溝を設け、前記ライナー部材の前記貫通溝部分には、前記回転筒体の回転に伴って前記ライナー部材に対して相対的に光軸方向に沿って移動する前記３つの筒体のその他の筒体と前記回転筒体との間に光軸方向についての付勢力を与える付勢部材を備え、
前記付勢部材は、付勢力を発生するバネと、このバネを受け且つ前記ライナー部材に対し光軸方向に沿って相対的に移動するバネ受け部材とを有して構成されていることにより、
特に、付勢部材の光軸方向の移動をスムーズにし、複数の筒体間に安定した付勢力を作用させて、付勢力の変動幅を抑え、複数の筒体間の遊びによるガタを無くし、結果として、撮影状態における回転筒体およびライナー部材の内側の複数の撮影レンズ群の光軸のズレを無くし、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質を向上させることができる。 That is, according to the lens barrel of claim 1 of the present invention,
Each group is disposed on at least one lens frame that holds at least one lens group of a plurality of lens groups each composed of one or more lenses, and at least one of an outer periphery and an inner periphery of the at least one lens frame. Having at least three cylinders, at least one of the at least three cylinders as a rotating cylinder, rotating the rotating cylinder, and moving the rotating cylinder along the optical axis direction; In a lens barrel that retracts at least a part of the lens group and the lens frame and retracts at least a part of the lens group and the lens frame from a retracted state in which the lens group is accommodated and moves the lens group and the lens frame to the objective side to obtain a photographing state. ,
Either one of the inner side and the outer side of the rotary cylinder, as another cylinder of the three cylinders, the rotary cylinder is rotatable relative to the rotary cylinder and the optical axis direction is the rotation cylinder. A liner member having a rectilinear groove that linearly moves integrally and restricts relative rotation of at least one of the cylinders other than the lens frame and the three cylinders; A through-groove extending in the optical axis direction is provided, and the three through-groove portions of the liner member move along the optical axis direction relative to the liner member as the rotating cylinder rotates. A biasing member that applies a biasing force in the optical axis direction between the other cylindrical body of the cylindrical body and the rotating cylindrical body ;
Wherein the biasing member includes a spring that generates a biasing force by Rukoto consists a spring receiving member moves relatively along the optical axis direction with respect to and the liner member receiving the spring,
In particular, the urging member moves smoothly in the optical axis direction, a stable urging force is applied between the plurality of cylinders, the fluctuation range of the urging force is suppressed, and play due to play between the plurality of cylinders is eliminated. As a result, the optical axis of the plurality of taking lens groups inside the rotating cylinder and the liner member in the shooting state is eliminated, the lens performance is improved and the image quality of the acquired image is improved without increasing the size when retracted. Can do.

本発明の請求項２のレンズ鏡胴によれば、請求項１のレンズ鏡胴において、
前記付勢部材は、前記ライナー部材の内側および外側の少なくとも一方に配置される前記回転筒体および前記その他の筒体を相対的に光軸方向に付勢することにより、
特に、沈胴状態と撮影状態との間で、光軸方向に沿って移動し且つ相互間で相対的に移動する複数の筒体間の可動部分の遊びによるガタを無くすことで、結果として複数の筒体の内側の複数の撮影レンズ群の光軸のズレを無くして撮像画質を向上させることができる。 According to the lens barrel of claim 2 of the present invention, in the lens barrel of claim 1,
The biasing member relatively biases the rotating cylinder and the other cylinders arranged in at least one of the inner side and the outer side of the liner member in the optical axis direction,
In particular, by eliminating play due to play of movable parts between a plurality of cylinders that move along the optical axis direction and move relative to each other between the retracted state and the photographing state, as a result, a plurality of The image quality can be improved by eliminating the deviation of the optical axes of the plurality of taking lens groups inside the cylinder .

本発明の請求項３のレンズ鏡胴によれば、請求項１のレンズ鏡胴において、
前記バネ受け部材を、前記ライナー部材の貫通溝に沿って光軸方向に移動可能とすることにより、
特に、複数の筒体間に作用させる付勢力の変動幅を抑え、複数の筒体間の遊びによるガタの影響を抑制し、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。
本発明の請求項４のレンズ鏡胴によれば、請求項１または請求項３のレンズ鏡胴において、
前記バネ受け部材は、前記回転筒体および前記その他の筒体のいずれか一方に形成されたカム溝に嵌合するカムフォロワを有することにより、
特に、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを抑制し、撮像画質を向上させることができる。 According to the lens barrel of claim 3 of the present invention, in the lens barrel of claim 1 ,
By allowing the spring receiving member to move in the optical axis direction along the through groove of the liner member,
In particular, the fluctuation range of the urging force acting between the plurality of cylinders is suppressed, and the influence of play due to play between the plurality of cylinders is suppressed. As a result, the light of the plurality of photographing lens groups inside the plurality of cylinders Axial misalignment can be eliminated and image quality can be improved.
According to the lens barrel of claim 4 of the present invention, in the lens barrel of claim 1 or claim 3 ,
The spring receiving member has a cam follower that fits into a cam groove formed in one of the rotating cylinder and the other cylinder.
In particular, the fluctuation of the urging force acting between the plurality of cylinders is effectively suppressed, the influence of play due to play of the movable part is suppressed, and as a result, the optical axes of the plurality of photographing lens groups inside the plurality of cylinders The image quality can be improved.

本発明の請求項５のレンズ鏡胴によれば、請求項１のレンズ鏡胴において、
前記バネを、板バネとして構成することにより、
特に、簡単な構成で且つ狭い占有スペースで、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを抑制し、撮像画質を向上させることができる。
本発明の請求項６のレンズ鏡胴によれば、請求項１のレンズ鏡胴において、
前記バネを、圧縮コイルバネとして構成することにより、
特に、簡単で且つ簡易な構成で、複数の筒体間に作用させる付勢力の変動を効果的に抑え、可動部分の遊びによるガタの影響を抑制し、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを抑制し、撮像画質を向上させることができる。
本発明の請求項７のレンズ鏡胴によれば、請求項５または請求項６のレンズ鏡胴において、
前記バネは、一端を前記バネ受け部材に固定することにより、
特に、沈胴状態から撮影状態に移行するときに安定して回転筒体と当接して付勢することができ、複数の筒体間に作用させる付勢力を安定して付与させることができ、可動部分の遊びによるガタを無くし、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。 According to the lens barrel of claim 5 of the present invention, in the lens barrel of claim 1 ,
By configuring the spring as a leaf spring,
In particular, with a simple structure and a small occupied space, it is possible to effectively suppress fluctuations in the urging force acting between the plurality of cylinders, and to suppress the influence of play due to play of the movable part. It is possible to suppress the deviation of the optical axes of the plurality of inner photographing lens groups and improve the image quality of the image.
According to the lens barrel of claim 6 of the present invention, in the lens barrel of claim 1 ,
By configuring the spring as a compression coil spring,
In particular, with a simple and simple configuration, the fluctuation of the urging force acting between the plurality of cylinders is effectively suppressed, and the influence of play due to play of the movable part is suppressed. It is possible to suppress the deviation of the optical axes of the plurality of photographing lens groups and improve the image quality of the captured image.
According to the lens barrel according to claim 7 of the present invention, in 請 Motomeko 5 or the lens barrel according to claim 6,
By fixing one end of the spring to the spring receiving member,
In particular, when moving from the retracted state to the shooting state, it is possible to stably abut against the rotating cylinder and urge it, and to stably apply the urging force that acts between the plurality of cylinders. As a result, it is possible to eliminate the play caused by the play of the portion, and to eliminate the optical axis shift of the plurality of photographing lens groups inside the plurality of cylinders, thereby improving the image quality of the image pickup.

本発明の請求項８のレンズ鏡胴によれば、請求項１〜請求項７のいずれか１項のレンズ鏡胴において、
前記付勢部材は、沈胴状態では、前記回転筒体と前記その他の筒体の少なくとも一方に接触せず、付勢力を発生しないが、撮影状態では、前記回転筒体と前記その他の筒体の両方に当接して前記回転筒体と前記その他の筒体を光軸方向に相対的に付勢することにより、
特に、沈胴と繰り出しの動作時における消費電力を減らすことができる。
本発明の請求項９のレンズ鏡胴によれば、請求項１〜請求項８のいずれか１項のレンズ鏡胴において、
前記付勢部材は、撮影状態では、前記ライナー部材および前記回転筒体に対する前記その他の筒体の光軸方向の相対移動に、ほぼ同一の移動速度で追随して光軸方向に相対移動させることにより、
特に、撮影状態のズーム領域でも複数の筒体間にほぼ一定の付勢力を作用させて、可動部分の遊びによるガタの影響を無くし、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。 According to the lens barrel of claim 8 of the present invention, in the lens barrel of any one of claims 1 to 7 ,
In the retracted state, the urging member does not contact at least one of the rotating cylinder and the other cylinder and does not generate an urging force. By relatively urging the rotating cylinder and the other cylinders in the optical axis direction in contact with both,
In particular, it is possible to reduce power consumption during the retracting and feeding operations.
According to the lens barrel of claim 9 of the present invention, in the lens barrel of any one of claims 1 to 8 ,
In the photographing state, the biasing member follows the relative movement in the optical axis direction of the other cylindrical body with respect to the liner member and the rotating cylindrical body at a substantially same moving speed, and is relatively moved in the optical axis direction. By
In particular, a substantially constant urging force is applied between the plurality of cylinders even in the zoom region in the shooting state, thereby eliminating the influence of play due to play of the movable part, and as a result, a plurality of shooting lens groups inside the plurality of cylinders. It is possible to eliminate the optical axis deviation and improve the image quality.

本発明の請求項１０のレンズ鏡胴によれば、請求項１〜請求項９のいずれか１項のレンズ鏡胴において、
前記付勢部材は、同一円周上に少なくとも２つ設けることにより、
特に、偏り無く、複数の筒体間に安定に付勢力を作用させて、可動部分の遊びによるガタの影響を無くし、結果として、複数の筒体の内側の複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。
本発明の請求項１１のレンズ鏡胴によれば、請求項１〜請求項１０のいずれか１項のレンズ鏡胴において、
前記ライナー部材と前記回転筒体とが、ヘリコイド嵌合していることにより、
特に、複数の筒体間に安定に付勢力を作用させて、ヘリコイド嵌合部分の遊びによるガタの影響を効果的に抑制し、結果的に複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。
本発明の請求項１２のレンズ鏡胴によれば、請求項４のレンズ鏡胴において、
前記カム溝を、有底溝からなる有底カムとすることにより、
特に、外観を阻害することなく、複数の筒体間に付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、複数の撮影レンズ群の光軸のズレを抑制し、撮像画質を向上させることができる。
本発明の請求項１３のレンズ鏡胴によれば、請求項４のレンズ鏡胴において、
前記その他の筒体は、前記回転筒体に連動して回転し、前記ライナー部材に対して相対的に光軸方向に沿って移動する他の回転筒体であることにより、
特に、３つの筒体間に付勢力を作用させて、可動部分の遊びによるガタの影響を抑制し、結果的に、３つの筒体の内側の複数の撮影レンズ群の光軸のズレを無くし、撮像画質を向上させることができる。
本発明の請求項１４の撮像装置によれば、
撮像用光学系として、請求項１〜請求項１３のいずれか１項のレンズ鏡胴を用いた光学系を含むことにより、
特に、複数の筒体間の遊びによるガタを無くし、結果として、複数の筒体の内側の撮影状態におけるレンズ群間の遊びによる影響を抑制し、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質を向上させることができる。 According to the lens barrel of claim 10 of the present invention, in the lens barrel of any one of claims 1 to 9 ,
By providing at least two urging members on the same circumference,
In particular, the biasing force is stably applied between a plurality of cylinders without deviation, and the influence of play due to the play of the movable part is eliminated. As a result, the optical axes of the plurality of photographing lens groups inside the plurality of cylinders are eliminated. Misalignment can be eliminated and the image quality can be improved.
According to the lens barrel of claim 11 of the present invention, in the lens barrel of any one of claims 1 to 10 ,
The liner member and the rotating cylinder are helicoid fitted,
In particular, the urging force is applied stably between a plurality of cylinders, and the effect of play due to play of the helicoid fitting portion is effectively suppressed, and as a result, the deviation of the optical axes of the plurality of photographing lens groups is eliminated. The imaging quality can be improved.
According to the lens barrel of claim 12 of the present invention, in the lens barrel of claim 4 ,
By making the cam groove a bottomed cam consisting of a bottomed groove,
In particular, the urging force is applied between the multiple cylinders without impairing the appearance, and the influence of play due to the play of the movable part is suppressed, the optical axis shift of the multiple photographing lens groups is suppressed, and the image quality Can be improved.
According to the lens barrel of claim 13 of the present invention, in the lens barrel of claim 4 ,
The other cylindrical body rotates in conjunction with the rotating cylindrical body, and is another rotating cylindrical body that moves relative to the liner member along the optical axis direction.
In particular, an urging force is applied between the three cylinders to suppress the effect of play due to play of the movable part, and as a result, the optical axis shift of the plurality of taking lens groups inside the three cylinders is eliminated. The image quality can be improved.
According to the imaging device of claim 14 of the present invention,
By including an optical system using the lens barrel of any one of claims 1 to 13 as an imaging optical system,
In particular, there is no play due to play between the multiple cylinders, and as a result, the influence of play between the lens groups in the shooting state inside the multiple cylinders is suppressed, and the lens performance is improved without increasing the size when retracted. The improvement and the quality of the acquired image can be improved.

本発明の請求項１５の情報装置によれば、
カメラ機能部を有し、且つ前記カメラ機能部の撮像用光学系として、請求項１〜請求項１２のいずれか１項のレンズ鏡胴を用いた光学系を含むことにより、
特に、簡単な構成で、複数の筒体間の遊びによるガタを無くし、結果として、簡単な構成で撮影状態における複数の筒体間の遊びによる影響を抑制し、沈胴時の寸法を増大させることなくレンズ性能の向上および取得画像の画質の向上を図ることができる。 According to the information device of claim 15 of the present invention,
By including an optical system using the lens barrel of any one of claims 1 to 12 as an imaging optical system of the camera function unit having a camera function unit,
In particular, it eliminates play due to play between a plurality of cylinders with a simple configuration, and as a result, the influence of play between a plurality of cylinders in a shooting state is suppressed with a simple configuration, and the size when retracted is increased. Therefore, it is possible to improve the lens performance and the quality of the acquired image.

本発明の第１の実施の形態に係るレンズ鏡胴（カメラコアユニット）の構成を示す沈胴状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。It is a typical longitudinal cross-sectional view of the retracted state which shows the structure of the lens barrel (camera core unit) which concerns on the 1st Embodiment of this invention, (a) is substantially whole and (b) is ( It is an enlarged detail drawing of the B section in a). 図１のレンズ鏡胴の構成を示す広角（短焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。FIG. 2 is a schematic longitudinal sectional view in a wide-angle (short focus) photographing state showing the configuration of the lens barrel of FIG. 1, in which (a) is almost the whole, and (b) is an enlarged portion of a B portion in (a). FIG. 図１のレンズ鏡胴の構成を示す望遠（長焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。FIG. 2 is a schematic longitudinal sectional view in a telephoto (long focus) photographing state showing the configuration of the lens barrel of FIG. 1, (a) is almost the whole, and (b) is an enlarged portion of a B portion in (a). FIG. 図１のレンズ鏡胴の沈胴状態における外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure in the retracted state of the lens barrel of FIG. 図１のレンズ鏡胴の撮影状態における外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure in the imaging | photography state of the lens barrel of FIG. 図１のレンズ鏡胴に用いる付勢部材を外周側から見た外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure which looked at the biasing member used for the lens barrel of FIG. 1 from the outer peripheral side. 図６の付勢部材を内周側から見た外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure which looked at the biasing member of FIG. 6 from the inner peripheral side. 図６の付勢部材を示す模式的縦断面図である。It is a typical longitudinal cross-sectional view which shows the urging | biasing member of FIG. 図１のレンズ鏡胴に用いる第１のライナー部材（ライナー部材大）を斜め物体側から見た外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure which looked at the 1st liner member (liner member large) used for the lens barrel of FIG. 1 from the diagonal object side. 図１のレンズ鏡胴に用いる第１の回転筒体（回転筒大）を斜め像面側から見た外観構成を示す模式的斜視図である。It is a typical perspective view which shows the external appearance structure which looked at the 1st rotation cylinder (rotation cylinder large) used for the lens barrel of FIG. 1 from the diagonal image surface side. 図１のレンズ鏡胴における第１の回転筒体（回転筒大）、第１のライナー部材（ライナー部材大）、第２の回転筒（回転筒小）および付勢部材の相互連係位置関係を説明するための模式的平面図である。In the lens barrel shown in FIG. 1, the first rotating cylinder (large rotating cylinder), the first liner member (large liner member), the second rotating cylinder (small rotating cylinder) and the urging member are linked to each other. It is a schematic plan view for demonstrating. 本発明の第２の実施の形態に係るレンズ鏡胴の構成を示す沈胴状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。It is a typical longitudinal cross-sectional view of the retracted state which shows the structure of the lens barrel which concerns on the 2nd Embodiment of this invention, (a) is substantially the whole, (b) is B part in (a). FIG. 図１２のレンズ鏡胴の構成を示す広角（短焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。FIGS. 13A and 13B are schematic longitudinal sectional views showing a configuration of the lens barrel of FIG. 12 in a wide-angle (short focus) photographing state, in which FIG. 12A is almost the whole and FIG. 12B is an enlarged portion of a portion B in FIG. FIG. 図１２のレンズ鏡胴の構成を示す望遠（長焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。FIGS. 13A and 13B are schematic longitudinal sectional views in a telephoto (long focal point) photographing state showing the configuration of the lens barrel of FIG. 12, in which FIG. 12A is almost the whole, and FIG. 12B is an enlarged portion of a portion B in FIG. FIG.

以下、本発明の実施の形態に基づき、図面を参照して本発明に係るレンズ鏡胴を詳細に説明する。
図１〜図１１は、本発明の第１の実施の形態に係るレンズ鏡胴（レンズ鏡胴を含むカメラコアユニット）の構成を示しており、図１〜図５はレンズ鏡胴のほぼ全体の構成を示している。図１は、本発明の第１の実施の形態に係るレンズ鏡胴の上半部分の構成を示す沈胴状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。図２は、図１のレンズ鏡胴の上半部分の構成を示す広角（短焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。そして、図３は、図１のレンズ鏡胴の上半部分の構成を拡大して示す望遠（長焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。また、図４は、図１のレンズ鏡胴の沈胴状態における外観構成を示す模式的斜視図であり、図５は、図１のレンズ鏡胴の撮影状態における外観構成を示す模式的斜視図である。 Hereinafter, based on an embodiment of the present invention, a lens barrel according to the present invention will be described in detail with reference to the drawings.
FIGS. 1-11 has shown the structure of the lens barrel (camera core unit containing a lens barrel) which concerns on the 1st Embodiment of this invention, FIGS. 1-5 is almost the whole lens barrel. The structure of is shown. FIG. 1 is a schematic longitudinal sectional view of a retracted state showing a configuration of an upper half portion of a lens barrel according to a first embodiment of the present invention, wherein (a) is almost the whole, and (b). These are the enlarged partial detail drawings of the B section in (a). FIG. 2 is a schematic longitudinal sectional view of a wide-angle (short focus) photographing state showing the configuration of the upper half portion of the lens barrel of FIG. 1, (a) is almost the whole, and (b) is ( It is an enlarged detail drawing of the B section in a). FIG. 3 is a schematic longitudinal sectional view of a telephoto (long focal point) photographing state showing the configuration of the upper half portion of the lens barrel of FIG. 1 in an enlarged manner. FIG. b) is an enlarged detail view of a portion B in (a). 4 is a schematic perspective view showing an external configuration in the retracted state of the lens barrel in FIG. 1, and FIG. 5 is a schematic perspective view showing an external configuration in the photographing state of the lens barrel in FIG. is there.

また、図６〜図１０は、図１〜図５に用いられている各部分の詳細を模式的に示している。図６は、図１のレンズ鏡胴に用いる付勢部材を外周側から見た外観構成を示す模式的斜視図、図７は、図６の付勢部材を内周側から見た外観構成を示す模式的斜視図、そして、図８は、図６の付勢部材を示す模式的縦断面図である。図９は、図１のレンズ鏡胴に用いる第１のライナー部材（ライナー部材大）を斜め物体側から見た外観構成を示す模式的斜視図であり、そして図１０は、図１のレンズ鏡胴に用いる第１の回転筒体（回転筒大）を斜め像面側から見た外観構成を示す模式的斜視図である。
図１〜図１０に示すレンズ鏡胴は、第１群レンズ系１１、第２群レンズ系１２、絞り／シャッタユニット１３、第３群レンズ系１４、第４群レンズ系１５、撮像素子ユニット１６、第１群レンズ枠２１、第２群レンズ枠２２、内カム部材２３、ライナー部材小（第２のライナー部材）２４、回転筒小（第２の回転筒体）２５、ライナー部材大（第１のライナー部材）２６、回転筒大（第１の回転筒体）２７、固定枠２８、圧縮バネ２９、バネ受け部材３０および板バネ３１を具備している。なお、絞り／シャッタユニット１３、第１群レンズ枠２１、第２群レンズ枠２２、回転筒小２５およびバネ受け部材３０には、それぞれカムフォロワ１３ａ、カムフォロワ２１ａ、カムフォロワ２２ａ、カムフォロワ２５ａおよびカムフォロワ３０ａが、圧入等により植設されており、回転筒小２５には、さらに段差部２５ｂが形成され、ライナー部材大２６には、直進溝２６ａおよびヘリコイド溝２６ｂが設けられ、回転筒大２７には、図１０に示すように、カム溝２７ａが設けられ、そして板バネ３１には、当接部３１ａが形成されている。 6 to 10 schematically show details of each part used in FIGS. 1 to 5. 6 is a schematic perspective view showing an external configuration of the biasing member used in the lens barrel of FIG. 1 as viewed from the outer peripheral side, and FIG. 7 is an external configuration of the biasing member of FIG. 6 as viewed from the inner peripheral side. FIG. 8 is a schematic perspective view showing the urging member of FIG. 6. 9 is a schematic perspective view showing an external configuration of the first liner member (large liner member) used in the lens barrel of FIG. 1 as viewed from the oblique object side, and FIG. 10 is a lens mirror of FIG. It is a typical perspective view which shows the external appearance structure which looked at the 1st rotation cylinder (rotation cylinder large) used for a cylinder from the diagonal image surface side.
The lens barrel shown in FIGS. 1 to 10 includes a first group lens system 11, a second group lens system 12, an aperture / shutter unit 13, a third group lens system 14, a fourth group lens system 15, and an image sensor unit 16. , First group lens frame 21, second group lens frame 22, inner cam member 23, small liner member (second liner member) 24, small rotating cylinder (second rotating cylinder) 25, large liner member (first 1 liner member) 26, a large rotating cylinder (first rotating cylinder) 27, a fixed frame 28, a compression spring 29, a spring receiving member 30, and a leaf spring 31. The diaphragm / shutter unit 13, the first group lens frame 21, the second group lens frame 22, the small rotating barrel 25, and the spring receiving member 30 include a cam follower 13a, a cam follower 21a, a cam follower 22a, a cam follower 25a, and a cam follower 30a, respectively. The rotary cylinder small 25 is further provided with a stepped portion 25b, the liner member large 26 is provided with a rectilinear groove 26a and a helicoid groove 26b, and the rotary cylinder large 27 is As shown in FIG. 10, a cam groove 27 a is provided, and a contact portion 31 a is formed on the leaf spring 31.

図１および図４に示す沈胴状態においては、図１に示す通り、第１群レンズ系１１と、第２群レンズ系１２と、絞り／シャッタユニット１３とは、物体側から、順次、光軸に沿って配置されており、第３群レンズ系１４と第４群レンズ系１５とは、図示してはいないが、光軸から退避した場所に格納されている。第１群レンズ系１１は、第１群レンズ枠２１に、そして第２群レンズ系１２は、第２群レンズ枠２２に、それぞれ保持されている。
この状態から図２、図３および図５に示す撮影状態へ移行するために、図示していない駆動源の駆動力によって第１の回転筒体としての回転筒大２７を光軸周りに回転させる。回転筒大２７とその外側の固定枠２８とは、ヘリコイド嵌合しており、回転筒大２７を回転させることによって、回転筒大２７を光軸方向に繰り出す。回転筒大２７の内側には、第１のライナー部材としてのライナー部材大２６が、相対的に回転可能であるが光軸方向には相対移動せず一体的に移動するような嵌合をしており、ライナー部材大２６は、固定枠２８の直進溝に嵌合することによって、回転することなく回転筒大２７と一体的に連動して同じ位置へ直進する。 In the retracted state shown in FIGS. 1 and 4, as shown in FIG. 1, the first group lens system 11, the second group lens system 12, and the aperture / shutter unit 13 are sequentially arranged from the object side along the optical axis. Although not shown, the third group lens system 14 and the fourth group lens system 15 are stored in a place retracted from the optical axis. The first group lens system 11 is held in the first group lens frame 21, and the second group lens system 12 is held in the second group lens frame 22.
In order to shift from this state to the photographing state shown in FIGS. 2, 3, and 5, the rotating cylinder 27 as the first rotating cylinder is rotated around the optical axis by the driving force of a driving source (not shown). . The rotating cylinder large 27 and the outer fixed frame 28 are helicoid-fitted, and the rotating cylinder large 27 is extended in the optical axis direction by rotating the rotating cylinder large 27. A liner member large 26 as a first liner member is fitted inside the rotary cylinder large 27 so that it can rotate relatively but does not move relatively in the optical axis direction and moves integrally. The large liner member 26 is fitted into the straight advance groove of the fixed frame 28, so that the liner member large 26 moves straight to the same position integrally with the rotary cylinder large 27 without rotating.

さらに、ライナー部材大２６の内側には、第２の回転筒体としての回転筒小２５がヘリコイド嵌合しており、回転筒小２５に圧入されたカムフォロワ２５ａによって、回転筒大２７の回転が回転筒小２５に伝えられる。すなわち、回転筒大２７の内側には、カムフォロワ２５ａが嵌合する直進溝が形成されており、回転筒大２７と回転筒小２５は、連動して一体的に回転し、ヘリコイド嵌合しているライナー部材大２６に対して回転筒小２５が繰り出される。回転筒小２５の内側には第１群レンズ枠２１に圧入されているカムフォロワ２１ａに嵌合するカムが形成されており、さらに内側に第２のライナー部材としてのライナー部材小２４と直進嵌合している。ライナー部材小２４はライナー部材大２６と直進嵌合しており、これによって第１群レンズ枠２１は回転筒小２５の内側に形成されたカムに沿って回転せずに繰り出される。また内カム部材２３は、回転筒小２５とほぼ一体化されており、第２群レンズ枠２２に圧入されたカムフォロワ２２ａと絞り／シャッタユニット１３に圧入されたカムフォロワ１３ａと嵌合し、カムフォロワ２２ａとカムフォロワ１３ａはライナー部材小２４の内側に形成された直進溝に嵌合していて、内カム部材２３が回転すると内カム部材２３に形成されたカムによって第２群レンズ枠２２と絞り／シャッタユニット１３が光軸方向に繰り出される。なお、撮像素子ユニット１６は、撮像素子、撮像素子の信号を取り出すフレキシブルプリント基板（ＦＰＣ）、撮像素子を固定する押さえおよびゴーストやフレアを防止する遮光シート等が一体化されて構成される。 Further, a small rotating cylinder 25 as a second rotating cylinder is helicoidally fitted inside the large liner member 26, and the rotating cylinder large 27 is rotated by a cam follower 25a press-fitted into the rotating cylinder small 25. It is transmitted to the small rotary cylinder 25. In other words, a rectilinear groove into which the cam follower 25a is fitted is formed inside the rotary cylinder large 27, and the rotary cylinder large 27 and the rotary cylinder small 25 rotate integrally with each other and are helicoid-fitted. The small rotating cylinder 25 is fed out with respect to the large liner member 26. A cam that fits into a cam follower 21a that is press-fitted into the first group lens frame 21 is formed inside the small rotary cylinder 25, and further a liner member 24 as a second liner member is linearly fitted inside the cam cylinder 21a. doing. The liner member small 24 is linearly fitted to the liner member large 26, whereby the first group lens frame 21 is fed out without rotating along the cam formed inside the small rotating tube 25. The inner cam member 23 is substantially integrated with the small rotary cylinder 25, and is engaged with the cam follower 22a press-fitted into the second group lens frame 22 and the cam follower 13a press-fitted into the aperture / shutter unit 13, and the cam follower 22a. The cam follower 13a is fitted in a rectilinear groove formed inside the liner member small 24, and when the inner cam member 23 rotates, the cam formed on the inner cam member 23 and the second group lens frame 22 and the aperture / shutter The unit 13 is extended in the optical axis direction. The image sensor unit 16 is configured by integrating an image sensor, a flexible printed circuit board (FPC) that takes out signals from the image sensor, a presser that fixes the image sensor, a light shielding sheet that prevents ghosts and flares, and the like.

図２に示すような広角（短焦点）撮影状態に移行する直前に、第３群レンズ系１４と第４群レンズ系１５が図示していない操作機構により、図２のように光軸位置に挿入され、撮影可能状態となる。さらに、回転筒大２７を回転させると変倍動作となり、回転筒小２５の内側および内カム２３に形成されたカムに沿って第１群レンズ枠２１と第２群レンズ枠２２と絞り／シャッタユニット１３とが、それぞれ所定の位置へ移動される。第３群レンズ系１４と第４群レンズ系１５は、第１群レンズ枠２１、第２群レンズ枠２２、絞り／シャッタユニット１３とは別のアクチュエータにて駆動されて、所定の位置へ移動される。このようにして、図２に示す広角（短焦点）撮影状態から図３に示す望遠（長焦点）撮影状態までの変倍を行う。
第１群レンズ枠２１と第２群レンズ枠２２との間には、圧縮バネ２９が設置されており、第１群レンズ枠２１と第２群レンズ枠２２との間は、回転筒小２５と内カム２３を介して光軸方向に安定して付勢されている（図２に矢印で示す付勢力Ｐ２９Ａ，Ｐ２９Ｂ）。また、固定枠２８と、回転筒大２７およびライナー部材大２６との間にも安定させるための図示していない付勢部材が固定枠２８に設置されており、ライナー部材大２６を光軸方向に付勢している（図２に矢印で示す付勢力Ｐ２６）。 Immediately before shifting to the wide-angle (short focus) photographing state as shown in FIG. 2, the third group lens system 14 and the fourth group lens system 15 are moved to the optical axis position as shown in FIG. Inserted and ready to shoot. Further, when the rotary cylinder large 27 is rotated, a zooming operation is performed, and the first group lens frame 21, the second group lens frame 22, and the aperture / shutter are arranged inside the rotary cylinder small 25 and along the cam formed on the inner cam 23. Each of the units 13 is moved to a predetermined position. The third group lens system 14 and the fourth group lens system 15 are driven by actuators other than the first group lens frame 21, the second group lens frame 22, and the aperture / shutter unit 13 and moved to predetermined positions. Is done. In this way, zooming is performed from the wide-angle (short focus) shooting state shown in FIG. 2 to the telephoto (long focus) shooting state shown in FIG.
A compression spring 29 is installed between the first group lens frame 21 and the second group lens frame 22, and a small rotating cylinder 25 is provided between the first group lens frame 21 and the second group lens frame 22. And urged stably in the optical axis direction via the inner cam 23 (biasing forces P29A and P29B indicated by arrows in FIG. 2). Further, an urging member (not shown) for stabilizing between the fixed frame 28 and the rotary cylinder 27 and the liner member 26 is installed on the fixed frame 28, and the liner member 26 is arranged in the optical axis direction. (Biasing force P26 indicated by an arrow in FIG. 2).

そして、本発明に係る付勢部材は、図６〜図８に詳細に示すように、バネ受け部材３０およびバネとしての板バネ３１により構成している。この付勢部材によって、回転筒大２７およびライナー部材大２６と、回転筒小２５との間を、光軸に沿う方向に安定して付勢し（図２（ｂ）および図８に矢印で示す付勢力Ｐ３０，Ｐ３１）、固定枠２８に対して第１群レンズ枠２１と第２群レンズ枠２２の位置を安定させ、撮影画像の画質を向上させるようにしている。
すなわち、本発明に係る付勢部材は、図６〜図８に示すように、ほぼＬ字状に形成した樹脂製のバネ受け部材３０の屈曲部近傍に断面形状がおおむねＳ字状に折曲形成した板バネ３１の一端を固定して構成している。図６および図８に示すように、バネ受け部材３０の外側面のほぼ中央には、カムフォロワ３０ａを突出形成している。また、バネ受け部材３０の屈曲部近傍に一端が固定された板バネ３１の他端は当接部３１ａを形成している。図２（ｂ）および図８に示すように、この板バネ３１の当接部３１ａが、回転筒小２５の段差部２５ｂに当接して回転筒小２５を光軸に沿う方向への付勢力Ｐ３１にて付勢すると、バネ受け部材３０のカムフォロワ３０ａには反力としての付勢力Ｐ３０が発生する。 And the urging | biasing member which concerns on this invention is comprised by the leaf | plate spring 31 as the spring receiving member 30 and a spring, as shown in detail in FIGS. By this urging member, the large rotation cylinder 27, the liner member large 26, and the small rotation cylinder 25 are urged stably in the direction along the optical axis (in FIG. 2B and FIG. 8 with arrows). The urging forces P30, P31) shown in the figure are fixed, the positions of the first lens group frame 21 and the second lens group frame 22 are stabilized with respect to the fixed frame 28, and the image quality of the photographed image is improved.
That is, as shown in FIGS. 6 to 8, the urging member according to the present invention has a cross-sectional shape that is generally bent into an S shape in the vicinity of the bent portion of the resin spring receiving member 30 formed in an L shape. One end of the formed leaf spring 31 is fixed. As shown in FIGS. 6 and 8, a cam follower 30 a is formed so as to protrude substantially at the center of the outer surface of the spring receiving member 30. The other end of the leaf spring 31 with one end fixed in the vicinity of the bent portion of the spring receiving member 30 forms an abutting portion 31a. As shown in FIGS. 2B and 8, the abutting portion 31 a of the leaf spring 31 abuts on the step portion 25 b of the small rotating tube 25 and biases the rotating tube small 25 in the direction along the optical axis. When energized at P31, an energizing force P30 as a reaction force is generated on the cam follower 30a of the spring receiving member 30.

このように構成された付勢部材は、図９等に示されているライナー部材大２６の直進溝２６ａに、光軸に沿う方向にスライド移動可能に係合配置する。すなわち、ライナー部材大２６の直進溝２６ａは、光軸に沿う方向に延在する貫通溝であり、この直進溝２６ａの両側縁部は、バネ受け部材３０の両側縁に対応して段差部を形成しており、バネ受け部材３０の両側縁が直進溝２６ａの両側縁部の段差部に係合し、バネ受け部材３０を光軸に沿って直進スライド可能としている。また、ライナー部材大２６の外側に配置される回転筒大２７の内側には、バネ受け部材３０のカムフォロワ３０ａが嵌合するカム溝２７ａを形成しており、回転筒大２７の相対的な回転により、カム溝２７ａおよびカムフォロワ３０ａを介してバネ受け部材３０を光軸に沿って直進スライドさせる。それと同時に、この付勢部材の板バネ３１の当接部３１ａが、回転筒小２５の段差部２５ｂに対して光軸に沿う方向への付勢力Ｐ３１を作用することにより、反力としてバネ受け部材３０のカムフォロワ３０ａに発生する付勢力Ｐ３０を回転筒大２７に伝達する。
上述した付勢部材は、ライナー部材大２６の円周上における付勢力が偏らないように複数個、つまり２個以上、等間隔で配置することが望ましく、例えば３個を円周上におおむね等間隔に（１２０度間隔）配置する。この場合、ライナー部材大２６には、光軸方向に沿う直進溝２６ａを３個形成し、それぞれに付勢部材を配置して、回転筒大２７によって挟み込む。 The urging member configured as described above is engaged and disposed in a straight movement groove 26a of the liner member large 26 shown in FIG. 9 and the like so as to be slidable in the direction along the optical axis. That is, the rectilinear groove 26 a of the liner member large 26 is a through groove extending in the direction along the optical axis, and the side edges of the rectilinear groove 26 a have stepped portions corresponding to the side edges of the spring receiving member 30. It is formed, and both side edges of the spring receiving member 30 are engaged with step portions on both side edges of the rectilinear groove 26a, so that the spring receiving member 30 can be slid linearly along the optical axis. In addition, a cam groove 27 a into which the cam follower 30 a of the spring receiving member 30 is fitted is formed inside the rotating cylinder large 27 disposed outside the liner member large 26. Thus, the spring receiving member 30 is slid linearly along the optical axis via the cam groove 27a and the cam follower 30a. At the same time, the abutting portion 31a of the leaf spring 31 of this urging member applies a urging force P31 in the direction along the optical axis to the step portion 25b of the small rotary cylinder 25, thereby providing a spring receiver as a reaction force. The urging force P30 generated in the cam follower 30a of the member 30 is transmitted to the large rotating cylinder 27.
The urging members described above are desirably arranged in a plurality, that is, two or more, at regular intervals so that the urging force on the circumference of the liner member 26 is not biased. For example, three are generally arranged on the circumference. Arranged at intervals (120 degree intervals). In this case, the liner member large 26 is formed with three rectilinear grooves 26 a along the optical axis direction, each of which is provided with an urging member, and is sandwiched between the large rotating cylinders 27.

このような付勢部材は、回転筒大２７とライナー部材大２６との相対的な回転により光軸に沿う方向に移動するが、その移動速度、つまり回転量に対する移動量、を回転筒大２７と回転筒小２５の変倍動作時の相対移動量とほぼ同等にすることによって、変倍動作時の板バネ３１による付勢力をほぼ一定とすることができる。なお、付勢部材を移動させるためのカム溝２７ａは、沈胴状態では板バネ３１の当接部３１ａが回転筒小２５の段差部２５ｂに当接しておらず、撮影状態となる直前に板バネの当接部３１ａが当接するような形状としている。
図１１には、バネ受け部材３０と板バネ３１からなる付勢部材、付勢部材を光軸方向に移動させるカム溝２７ａ、ヘリコイド嵌合している回転筒小２５とライナー部材大２６のヘリコイド溝２６ｂの関係を模式的に示している。図１１の左端には、回転筒小２５の側面段差部２５ｂおよび付勢部材の断面を示しており、その右側には、外側面側から見た付勢部材と、回転筒大２７のカム溝２７ａ、ライナー部材大２６のヘリコイド溝２６ｂおよび段差部２５ｂの軌跡を展開して示している。 Such an urging member moves in the direction along the optical axis due to the relative rotation of the rotary cylinder 27 and the liner member 26, and the moving speed, that is, the movement amount relative to the rotation amount, is changed. By making the relative movement amount of the rotating small cylinder 25 approximately equal to that during the magnification operation, the urging force by the leaf spring 31 during the magnification operation can be made substantially constant. The cam groove 27a for moving the urging member is not provided in the retracted state because the contact portion 31a of the leaf spring 31 is not in contact with the step portion 25b of the small rotary cylinder 25, and the leaf spring immediately before the photographing state is entered. The contact portion 31a is in contact with the contact portion 31a.
FIG. 11 shows an urging member composed of a spring receiving member 30 and a leaf spring 31, a cam groove 27a for moving the urging member in the optical axis direction, a helicoid fitting helicoid small rotor 25 and a liner member large 26 helicoid. The relationship of the groove | channel 26b is shown typically. The left end of FIG. 11 shows a cross section of the side step portion 25b of the small rotating cylinder 25 and the urging member, and the urging member viewed from the outer surface side and the cam groove of the large rotating cylinder 27 are on the right side. 27a, the locus of the helicoid groove 26b and the step portion 25b of the large liner member 26 are shown in an expanded manner.

付勢部材を構成するバネ受け部材３０と板バネ３１は、ライナー部材大２６の直進溝２６ａに光軸に沿う方向にのみ移動可能に設けられ、回転筒大２７の内側に形成されているカム溝２７ａにバネ受け部材３０のカムフォロワ３０ａが嵌合しているので、回転筒大２７が回転することによって、バネ受け部材３０と板バネ３１がカム溝２７ａに沿って光軸方向に移動する。板バネ３１の先端の当接部３１ａは、図に一点鎖線で示すような軌跡で移動する。一方、回転筒小２５は、光軸まわりの回転方向については、回転筒大２７と一体的に回転し、ライナー部材大２６の内側のヘリコイド２６ｂに沿って繰り出される。回転筒小２５の段差２５ｂは図に仮想線（二点鎖線）で示すような軌跡を描き、板バネ３１の先端当接部３１ａの軌跡とは、広角状態の直前でオーバーラップしている。このオーバーラップ量が板バネ３１の圧縮量となり、付勢力が作用する。オーバーラップした後は、板バネ３１は、付勢部材受け３０とともに回転筒小２５の繰り出し量と同じ移動量（移動速度）で光軸方向前方に移動するため、付勢力は広角状態から望遠状態まで一定となる。 The spring receiving member 30 and the leaf spring 31 constituting the urging member are provided in the rectilinear groove 26 a of the liner member large 26 so as to be movable only in the direction along the optical axis, and are cams formed inside the large rotating cylinder 27. Since the cam follower 30a of the spring receiving member 30 is fitted in the groove 27a, the spring receiving member 30 and the leaf spring 31 move in the optical axis direction along the cam groove 27a when the rotary cylinder 27 is rotated. The contact portion 31a at the tip of the leaf spring 31 moves along a locus as shown by a one-dot chain line in the figure. On the other hand, the rotating cylinder small 25 rotates integrally with the rotating cylinder large 27 in the rotation direction around the optical axis, and is fed out along the helicoid 26 b inside the liner member large 26. The step 25b of the small rotating cylinder 25 draws a trajectory as indicated by a virtual line (two-dot chain line) in the figure, and the trajectory of the tip contact portion 31a of the leaf spring 31 overlaps immediately before the wide-angle state. This overlap amount becomes the compression amount of the leaf spring 31, and an urging force acts. After the overlap, the leaf spring 31 moves together with the biasing member receiver 30 forward in the optical axis direction with the same amount of movement (moving speed) as the feeding amount of the small rotary cylinder 25, so that the biasing force is changed from the wide angle state to the telephoto state. It becomes constant until.

図１２〜図１４は、本発明の第２の実施の形態に係るレンズ鏡胴（レンズ鏡胴を含むカメラコアユニット）のほぼ全体の構成を示している。図１２は、本発明の第２の実施の形態に係るレンズ鏡胴の構成を示す沈胴状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。図１３は、図１２のレンズ鏡胴の構成を示す広角（短焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。そして、図１４は、図１２のレンズ鏡胴の構成を示す望遠（長焦点）撮影状態の模式的縦断面図であり、（ａ）は、ほぼ全体を、そして（ｂ）は、（ａ）におけるＢ部分の拡大部分詳細図である。
この場合、付勢部材を構成するバネとして、板バネ３１に代えて圧縮バネ４１を用いており、回転筒小２５の段差２５ａに当接する当接部４１ａを有している。図１２〜図１４の構成では、圧縮バネ４１の当接部４１ａが、段差部２５ｂに当接し、回転筒小２５を光軸に沿う方向に押圧して、図１３（ｂ）に示す付勢力Ｐ４１で付勢している。この圧縮バネ４１に関連する構成を除き、図１〜図３の場合とおおむね同様である。
さらに、上述した実施の形態のレンズ鏡胴を搭載してディジタルカメラ等の撮像装置を構成しても良く、携帯型情報端末装置等の情報装置のカメラ機能に上述した実施の形態のレンズ鏡胴を搭載しても良い。 12 to 14 show a configuration of almost the entire lens barrel (camera core unit including the lens barrel) according to the second embodiment of the present invention. FIGS. 12A and 12B are schematic longitudinal sectional views showing the configuration of the lens barrel according to the second embodiment of the present invention in a retracted state. FIG. 12A is a schematic view of the entire lens barrel, and FIG. FIG. FIG. 13 is a schematic longitudinal sectional view in a wide-angle (short focus) photographing state showing the configuration of the lens barrel of FIG. 12, where (a) is almost the whole, and (b) is B in (a). It is an enlarged partial detail drawing of a part. FIG. 14 is a schematic longitudinal sectional view of the lens barrel of FIG. 12 in a telephoto (long focus) photographing state, where (a) is almost the whole, and (b) is (a). FIG.
In this case, a compression spring 41 is used instead of the leaf spring 31 as a spring constituting the urging member, and a contact portion 41 a that contacts the step 25 a of the small rotary cylinder 25 is provided. 12 to 14, the abutting portion 41 a of the compression spring 41 abuts on the stepped portion 25 b and presses the rotating cylinder small 25 in the direction along the optical axis, and the urging force shown in FIG. It is energized at P41. Except for the configuration related to the compression spring 41, it is almost the same as the case of FIGS.
Further, an imaging device such as a digital camera may be configured by mounting the lens barrel of the above-described embodiment, and the lens barrel of the above-described embodiment is added to the camera function of the information device such as a portable information terminal device. May be installed.

１１第１群レンズ系
１２第２群レンズ系
１３絞り／シャッタユニット
１４第３群レンズ系
１５第４群レンズ系
１６撮像素子ユニット
２１第１群レンズ枠
２２第２群レンズ枠
２３内カム部材
２４ライナー部材小（第２のライナー部材）
２５回転筒小（第２の回転筒体）
２５ａカムフォロワ
２５ｂ段差部
２６ライナー部材大（第１のライナー部材）
２６ａ直進溝
２６ｂヘリコイド溝
２７回転筒大（第１の回転筒体）
２７ａカム溝
２８固定枠
２９圧縮バネ
３０バネ受け部材
３０ａカムフォロワ
３１板バネ
４１圧縮バネ
２５ｂ段差部
２６ａ直進溝
２６ｂヘリコイド溝
２７ａカム溝
３１ａ、４１ａ当接部 11 First Group Lens System 12 Second Group Lens System 13 Aperture / Shutter Unit 14 Third Group Lens System 15 Fourth Group Lens System 16 Image Sensor Unit 21 First Group Lens Frame 22 Second Group Lens Frame 23 Inner Cam Member 24 Small liner member (second liner member)
25 Small rotating cylinder (second rotating cylinder)
25a Cam follower 25b Stepped portion 26 Large liner member (first liner member)
26a Straight groove 26b Helicoid groove 27 Large rotating cylinder (first rotating cylinder)
27a cam groove 28 fixed frame 29 compression spring 30 spring receiving member 30a cam follower 31 leaf spring 41 compression spring 25b stepped portion 26a rectilinear groove 26b helicoid groove 27a cam groove 31a, 41a contact portion

特開２００７−１１４５３３号公報JP 2007-114533 A 特開２００９−２４４６１３号公報JP 2009-244613 A

Claims

Each group is disposed on at least one lens frame that holds at least one lens group of a plurality of lens groups each composed of one or more lenses, and at least one of an outer periphery and an inner periphery of the at least one lens frame. Having at least three cylinders, at least one of the at least three cylinders as a rotating cylinder, rotating the rotating cylinder, and moving the rotating cylinder along the optical axis direction; In a lens barrel that retracts at least a part of the lens group and the lens frame and retracts at least a part of the lens group and the lens frame from a retracted state in which the lens group is accommodated and moves the lens group and the lens frame to the objective side to obtain a photographing state. ,
Either one of the inner side and the outer side of the rotary cylinder, as another cylinder of the three cylinders, the rotary cylinder is rotatable relative to the rotary cylinder and the optical axis direction is the rotation cylinder. A liner member having a rectilinear groove that linearly moves integrally and restricts relative rotation of at least one of the cylinders other than the lens frame and the three cylinders; A through-groove extending in the optical axis direction is provided, and the three through-groove portions of the liner member move along the optical axis direction relative to the liner member as the rotating cylinder rotates. A biasing member that applies a biasing force in the optical axis direction between the other cylindrical body of the cylindrical body and the rotating cylindrical body ;
Said biasing member, wherein a spring that generates a biasing force, that you have constructed a spring receiving member moves relatively along the optical axis direction with respect to and the liner member receiving the spring Lens barrel.

The urging member urges the rotating cylindrical body and the other cylindrical body, which are disposed on at least one of the inner side and the outer side of the liner member, relatively in the optical axis direction. The lens barrel described.

The lens barrel according to claim 1 , wherein the spring receiving member is movable in the optical axis direction along a through groove of the liner member.

The spring receiving member, the lens according to claim 1 or claim 3, characterized in that it has a cam follower that fits into a cam groove formed in either one of the rotating cylinder and the other of the cylindrical body Torso.

The lens barrel according to claim 1 , wherein the spring is a leaf spring.

The lens barrel according to claim 1 , wherein the spring is a compression coil spring.

The lens barrel according to claim 5 or 6 , wherein one end of the spring is fixed to the spring receiving member.

In the retracted state, the urging member does not contact at least one of the rotating cylinder and the other cylinder and does not generate an urging force. the lens barrel according to any one of claims 1 to 7 which both the contacts, characterized in that relatively biasing the other of the cylinder and the rotating cylinder in the optical axis direction.

In the photographing state, the biasing member follows the relative movement in the optical axis direction of the other cylindrical body with respect to the liner member and the rotating cylindrical body, and moves relative to the optical axis direction at substantially the same moving speed. The lens barrel according to any one of claims 1 to 8 , wherein:

It said biasing member is a lens barrel according to any one of claims 1 to 9, wherein at least two provided that on the same circumference.

The lens barrel according to any one of claims 1 to 10 , wherein the liner member and the rotary cylinder are helicoid-fitted.

The lens barrel according to claim 4 , wherein the cam groove is a bottomed cam including a bottomed groove.

The other cylindrical body is rotated in conjunction with the rotating cylinder, according to claim 4, wherein the is another rotating cylinder that moves along the relative direction of the optical axis with respect to the liner member The lens barrel described in 1.

As an imaging optical system, an imaging apparatus which comprises an optical system using a lens barrel of any one of claims 1 to 13.

It has a camera function unit, and said as camera function unit imaging optical system, the information device which comprises an optical system using a lens barrel of any one of claims 1 to 12.