JP7362377B2 - Lens barrel and optical equipment including it - Google Patents
Lens barrel and optical equipment including it Download PDFInfo
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- JP7362377B2 JP7362377B2 JP2019165124A JP2019165124A JP7362377B2 JP 7362377 B2 JP7362377 B2 JP 7362377B2 JP 2019165124 A JP2019165124 A JP 2019165124A JP 2019165124 A JP2019165124 A JP 2019165124A JP 7362377 B2 JP7362377 B2 JP 7362377B2
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- 230000003287 optical effect Effects 0.000 title claims description 25
- 238000005096 rolling process Methods 0.000 claims description 9
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Description
本発明は、デジタルスチルカメラやビデオカメラ等の光学機器に搭載されるレンズ鏡筒に関し、特に像振れ補正装置を備えるレンズ鏡筒に関する。 The present invention relates to a lens barrel mounted on an optical device such as a digital still camera or a video camera, and more particularly to a lens barrel equipped with an image stabilization device.
近年、デジタルカメラの多様化に伴い、それに搭載されるレンズ鏡筒も様々な形状のものが開発されている。レンズ鏡筒の形状の変化に合わせて、レンズ鏡筒の内部に搭載されるレンズ駆動機構や像振れ補正機構などの構成を変化させることで機器全体を小型化および薄型化することができる。特許文献１には、レンズを保持した可動部材を光軸に垂直な平面内で移動自在に支持する支持機構として３つのボールを備える像振れ補正装置が開示されている。 In recent years, with the diversification of digital cameras, various shapes of lens barrels mounted thereon have been developed. The entire device can be made smaller and thinner by changing the configuration of the lens drive mechanism, image stabilization mechanism, etc. mounted inside the lens barrel in accordance with changes in the shape of the lens barrel. Patent Document 1 discloses an image stabilization device that includes three balls as a support mechanism that supports a movable member holding a lens movably within a plane perpendicular to the optical axis.
しかしながら、特許文献１の像振れ補正装置では、ボールの支持部がレンズ鏡筒の厚み方向へ突出しており、支持部を避けるためにレンズ鏡筒全体が厚みを増してしまう。厚みを抑えるために、レンズ鏡筒の枠部材に支持部を挿入するための凹形状や貫通孔を設けると、枠部材の強度が低下してしまう可能性がある。 However, in the image stabilization device disclosed in Patent Document 1, the support portion of the ball protrudes in the thickness direction of the lens barrel, and the thickness of the entire lens barrel increases in order to avoid the support portion. If a concave shape or a through hole for inserting the support portion is provided in the frame member of the lens barrel in order to reduce the thickness, the strength of the frame member may be reduced.
本発明は、薄型化可能であると共に、強度低下を抑制可能なレンズ鏡筒、およびそれを有する光学機器を提供することを目的とする。 An object of the present invention is to provide a lens barrel which can be made thinner and which can suppress a decrease in strength, and an optical device having the same.
本発明の一側面としてのレンズ鏡筒は、光学素子を保持する保持部材を光軸に垂直で、互いに直交する第１方向および第２方向へ移動可能に保持するベース部材、保持部材とベース部材との間に配置される転動部材、および保持部材を駆動する駆動手段を備える像振れ補正手段と、外部機器に接続するための接続部を備えると共に、駆動手段に接続される制御配線手段と、制御配線手段を外部に排出するための貫通孔を備えると共に、ベース部材を固定する収納部材とを有し、保持部材は、転動部材を支持する支持部を備え、ベース部材は、支持部の大きさに応じて第１方向へ突出する突出部を備え、突出部は、収納部材の厚み方向において接続部と重なるように貫通孔に挿入されていることを特徴とする。 A lens barrel according to one aspect of the present invention includes a base member that holds a holding member that holds an optical element movably in a first direction and a second direction that are perpendicular to the optical axis and orthogonal to each other, and a holding member and a base member. an image stabilizing means including a driving means for driving a rolling member and a holding member disposed between the image stabilization means, and a control wiring means connected to the driving means and having a connecting part for connecting to an external device; includes a through hole for discharging the control wiring means to the outside, and a storage member for fixing the base member, the holding member includes a support portion for supporting the rolling member, and the base member includes a support portion for supporting the rolling member. The storage member is characterized in that it includes a protrusion that protrudes in the first direction according to the size of the storage member, and that the protrusion is inserted into the through hole so as to overlap with the connection portion in the thickness direction of the storage member .
本発明によれば、薄型化可能であると共に、強度低下を抑制可能なレンズ鏡筒、およびそれを有する光学機器を提供することができる。 According to the present invention, it is possible to provide a lens barrel that can be made thinner and can suppress a decrease in strength, and an optical device having the same.
以下、本発明の実施例について、図面を参照しながら詳細に説明する。各図において、同一の部材については同一の参照番号を付し、重複する説明は省略する。
[全体構成]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same reference numerals are given to the same members, and duplicate explanations will be omitted.
[overall structure]
図１は、本発明の実施形態に係るビデオカメラやデジタルカメラ等の光学機器に搭載されるレンズ鏡筒１００のＹＺ平面に平行な断面図である。図２は、レンズ鏡筒１００の斜視図である。図３は、レンズ鏡筒の分解斜視図である。 FIG. 1 is a sectional view parallel to the YZ plane of a lens barrel 100 installed in an optical device such as a video camera or a digital camera according to an embodiment of the present invention. FIG. 2 is a perspective view of the lens barrel 100. FIG. 3 is an exploded perspective view of the lens barrel.
レンズ鏡筒１００は、１群レンズ保持枠１０１、２群レンズ保持枠２０１、３群ユニット３０、および４群レンズ保持枠４０１を有する。１群レンズ保持枠１０１は、１群レンズＬ１１，Ｌ１２を保持する固定群である。２群レンズ保持枠２０１は２群レンズＬ２１を保持する変倍系のレンズ群であり、光軸方向（Ｚ軸方向）へ移動可能である。３群ユニット３０は、３群レンズ（光学素子）Ｌ３１，Ｌ３２を保持する３群レンズ保持枠（保持部材）３０２とシャッタユニット３２０を備える３群ベース３０１（ベース部材）とを備える。また、３群ユニット３０は、像振れ補正ユニット（像振れ補正手段）３００を備え、撮影中に３群レンズ保持枠３０２が光軸と直交する方向（Ｘ軸方向およびＹ軸方向）へ移動することで、撮影時の手振れなどによる像振れを補正する。４群レンズ保持枠４０１は、４群レンズＬ４１，Ｌ４２を保持し、被写体にピントを合わせるためのフォーカスレンズ群である。 The lens barrel 100 includes a first group lens holding frame 101, a second group lens holding frame 201, a third group unit 30, and a fourth group lens holding frame 401. The first group lens holding frame 101 is a fixed group that holds the first group lenses L11 and L12. The second group lens holding frame 201 is a variable power lens group that holds the second group lens L21, and is movable in the optical axis direction (Z-axis direction). The third group unit 30 includes a third group lens holding frame (holding member) 302 that holds the third group lenses (optical elements) L31 and L32, and a third group base 301 (base member) that includes a shutter unit 320. Further, the third group unit 30 includes an image shake correction unit (image shake correction means) 300, and the third group lens holding frame 302 moves in a direction perpendicular to the optical axis (X-axis direction and Y-axis direction) during shooting. This corrects image blur caused by camera shake during shooting. The fourth group lens holding frame 401 is a focus lens group that holds the fourth group lenses L41 and L42 and focuses on the subject.
１群レンズ保持枠１０１から４群レンズ保持枠４０１は、鏡筒枠部材（収納部材）５０１内に収納されている。１群レンズ保持枠１０１は図示しない接着剤によって鏡筒枠部材５０１に保持され、２群レンズ保持枠２０１から４群レンズ保持枠４０１までは案内軸５０２ａ，５０２ｂによって支持されている。本実施形態では、鏡筒枠部材５０１は直方体状に形成されている。 The first group lens holding frame 101 to the fourth group lens holding frame 401 are housed in a lens barrel frame member (storage member) 501. The first group lens holding frame 101 is held to the lens barrel frame member 501 by an adhesive (not shown), and the second group lens holding frame 201 to the fourth group lens holding frame 401 are supported by guide shafts 502a and 502b. In this embodiment, the lens barrel frame member 501 is formed in the shape of a rectangular parallelepiped.
案内軸５０２ａ，５０２ｂは、両端を鏡筒枠部材５０１に保持されることで固定されている。案内軸５０２ａは、４群レンズ保持枠４０１の位置決めを行い、２群レンズ保持枠２０１と３群ユニット３０の回転を抑制する。案内軸５０２ｂは、２群レンズ保持枠２０１と３群ユニット３０の位置決めを行い、４群レンズ保持枠４０１の回転を抑制する。また、案内軸５０２ａ，５０２ｂは、２群レンズ保持枠２０１と４群レンズ保持枠４０１の光軸方向への移動を案内する。 The guide shafts 502a and 502b are fixed by being held at both ends by the lens barrel frame member 501. The guide shaft 502a positions the fourth group lens holding frame 401 and suppresses rotation of the second group lens holding frame 201 and the third group unit 30. The guide shaft 502b positions the second group lens holding frame 201 and the third group unit 30, and suppresses rotation of the fourth group lens holding frame 401. Further, the guide shafts 502a and 502b guide the movement of the second group lens holding frame 201 and the fourth group lens holding frame 401 in the optical axis direction.
モータ５０３，５０４は、略同形状であり、ビスにより鏡筒枠部材５０１に固定される。本実施形態では、モータ５０３，５０４の一例として、ステッピングモータが用いられている。モータ５０３（５０４）は、モータ本体５０３ａ（５０４ａ）、出力軸５０３ｂ（５０４ｂ）、および出力軸５０３ｂ（５０４ｂ）の倒れを抑制するためのガイドプレート５０３ｃ（５０４ｃ）を有する。出力軸５０３ｂ（５０４ｂ）には、２群レンズ保持枠２０１（４群レンズ保持枠４０１）に取り付けられたラック部材２０２（４０２）と螺合するネジ部が形成されている。モータ５０３，５０４はそれぞれ、ラック部材２０２，４０２を介して２群レンズ保持枠２０１および４群レンズ保持枠４０１を光軸方向へ駆動させる。 The motors 503 and 504 have substantially the same shape and are fixed to the lens barrel frame member 501 with screws. In this embodiment, stepping motors are used as an example of the motors 503 and 504. The motor 503 (504) has a motor main body 503a (504a), an output shaft 503b (504b), and a guide plate 503c (504c) for suppressing the fall of the output shaft 503b (504b). A threaded portion is formed on the output shaft 503b (504b) to be screwed into the rack member 202 (402) attached to the second group lens holding frame 201 (fourth group lens holding frame 401). Motors 503 and 504 drive the second group lens holding frame 201 and the fourth group lens holding frame 401 in the optical axis direction via the rack members 202 and 402, respectively.
３群ユニット３０は、鏡筒枠部材５０１に形成されている溝部５０１ａ，５０１ｂに３群ベース３０１の一部が嵌合し、光軸方向への移動が規制されている固定群である。また、鏡筒枠部材５０１には、貫通孔５０１ｃが形成されている。制御配線手段としてのフレキシブル基板３０７（以下ＦＰＣ）の外部機器に接続するためのコネクタ部（接続部）３０７ａは、貫通孔５０１ｃを通ってレンズ鏡筒１００の外部に排出される。ＦＰＣ３０７は、像振れ補正ユニット３００の駆動系、検出系およびシャッタユニット３２０の駆動系に接続される。 The third group unit 30 is a fixed group in which a portion of the third group base 301 fits into grooves 501a and 501b formed in the lens barrel frame member 501, and movement in the optical axis direction is restricted. Further, a through hole 501c is formed in the lens barrel frame member 501. A connector portion (connection portion) 307a for connecting to an external device of a flexible substrate 307 (hereinafter referred to as FPC) serving as a control wiring means is discharged to the outside of the lens barrel 100 through a through hole 501c. The FPC 307 is connected to the drive system of the image blur correction unit 300, the detection system, and the drive system of the shutter unit 320.
鏡筒枠部材５０１の４群ユニット４０の側の端部には、被写体を撮像するための撮像素子Ｌ１００が取り付けられている。撮像素子Ｌ１００は、センサプレート６０１に対して図示しない接着剤によって接着固定されている。センサプレート６０１は、ビスにより鏡筒枠部材５０１に固定される。センサプレート６０１と鏡筒枠部材５０１との間には、センサゴム６０２およびガラスフィルタＬ５０が配置されている。センサゴム６０２は、外部からのゴミの侵入を防ぐために、撮像素子Ｌ１００とガラスフィルタＬ５０との間を密閉している。
［３群ユニット構成］
図４は、３群ユニット３０の分解斜視図である。図４では、３群ユニット３０は、機能ごとに分解されている。３群ユニット３０は、像振れ補正ユニット３００、シャッタユニット３２０、および像振れ補正ユニット３００とシャッタユニット３２０とに接続されるＦＰＣ３０７を有する。本実施形態では、像振れ補正ユニット３００とシャッタユニット３２０はスナップフィットにより係止されるが、不図示の接着剤やビス締結によって固定されても構わない。ＦＰＣ３０７は、不図示のはんだや熱加締めによって像振れ補正ユニット３００およびシャッタユニット３２０に固定される。３群ベース３０１には、位置決め用孔３０１ａおよび回転止め用長孔３０１ｂが形成されている。位置決め用孔３０１ａおよび回転止め用長孔３０１ｂにはそれぞれ、案内軸５０２ａ，５０２ｂが嵌合している。これにより、３群ユニット３０は、Ｘ軸方向およびＹ軸方向において鏡筒枠部材５０１に固定される。
An image sensor L100 for capturing an image of a subject is attached to the end of the lens barrel frame member 501 on the fourth group unit 40 side. The image sensor L100 is adhesively fixed to the sensor plate 601 with an adhesive (not shown). The sensor plate 601 is fixed to the lens barrel frame member 501 with screws. A sensor rubber 602 and a glass filter L50 are arranged between the sensor plate 601 and the lens barrel frame member 501. The sensor rubber 602 seals between the image sensor L100 and the glass filter L50 to prevent dust from entering from the outside.
[3rd group unit configuration]
FIG. 4 is an exploded perspective view of the third group unit 30. In FIG. 4, the third group unit 30 is broken down into functions. The third group unit 30 includes an image blur correction unit 300, a shutter unit 320, and an FPC 307 connected to the image blur correction unit 300 and the shutter unit 320. In this embodiment, the image blur correction unit 300 and the shutter unit 320 are locked together by snap-fitting, but they may also be fixed by an adhesive or screw fastening (not shown). The FPC 307 is fixed to the image blur correction unit 300 and the shutter unit 320 by soldering or heat tightening (not shown). The third group base 301 has a positioning hole 301a and a rotation stopper slot 301b formed therein. Guide shafts 502a and 502b are fitted into the positioning hole 301a and the rotation stopper elongated hole 301b, respectively. Thereby, the third group unit 30 is fixed to the lens barrel frame member 501 in the X-axis direction and the Y-axis direction.
図５は、像振れ補正ユニット３００の分解斜視図である。図６は、センサホルダ３０６およびＦＰＣ３０７を外した状態の像振れ補正ユニット３００の内部構成図である。 FIG. 5 is an exploded perspective view of the image blur correction unit 300. FIG. 6 is an internal configuration diagram of the image blur correction unit 300 with the sensor holder 306 and FPC 307 removed.
３群レンズ保持枠３０２は、マグネット３０２Ｙ，３０２Ｐを有する。駆動用コイル３０３Ｙ，３０３Ｐは、それぞれがマグネット３０２Ｙ，３０２Ｐに対向するように設けられている。本実施形態では、マグネット３０２Ｙ，３０２Ｐおよび駆動用コイル３０３Ｙ，３０３Ｐにより駆動手段が構成される。添え字Ｙ，Ｐはそれぞれ、図６のＹａｗ方向およびＰｉｔｃｈ方向に対応している。本実施形態では、Ｙａｗ方向およびＰｉｔｃｈ方向は、Ｘ軸方向およびＹ軸方向に対して４５度回転させた方向に設定されている。駆動用コイル３０３Ｙ，３０３Ｐは、３群ベース３０１のコイル形状孔に挿入され、Ｚ軸方向で３群レンズ保持枠３０２と干渉しないように非図示の接着剤で固定される。また、マグネット３０２Ｙ，３０２Ｐは、Ｙ軸方向へ３群レンズＬ３１を挟むように設けられており、それぞれ略直交する方向へ３群レンズ保持枠３０２を駆動するように着磁されている。駆動用コイル３０３Ｙ，３０３Ｐに通電することで、マグネット３０２Ｙ，３０２Ｐおよび駆動用コイル３０３Ｙ，３０３Ｐに発生する電磁駆動力により３群レンズ保持枠３０２が駆動する。光学機器に与えられた振れを補正する方向へ３群レンズＬ３１，Ｌ３２を駆動させることで、安定した画像を取得することができる。 The third group lens holding frame 302 has magnets 302Y and 302P. The drive coils 303Y and 303P are provided to face the magnets 302Y and 302P, respectively. In this embodiment, the magnets 302Y, 302P and the driving coils 303Y, 303P constitute a driving means. Subscripts Y and P correspond to the Yaw direction and Pitch direction in FIG. 6, respectively. In this embodiment, the Yaw direction and the Pitch direction are set in directions rotated by 45 degrees with respect to the X-axis direction and the Y-axis direction. The driving coils 303Y and 303P are inserted into the coil-shaped holes of the third group base 301, and fixed with an adhesive (not shown) so as not to interfere with the third group lens holding frame 302 in the Z-axis direction. Further, the magnets 302Y and 302P are provided so as to sandwich the third group lens L31 in the Y-axis direction, and are each magnetized so as to drive the third group lens holding frame 302 in substantially orthogonal directions. By energizing the driving coils 303Y, 303P, the third group lens holding frame 302 is driven by the electromagnetic driving force generated in the magnets 302Y, 302P and the driving coils 303Y, 303P. A stable image can be obtained by driving the third lens group L31, L32 in a direction that corrects the shake imparted to the optical device.
なお、本実施形態では、３群レンズ保持枠３０２がマグネットを有し、３群ベース３０１が駆動用コイルを有するが、本発明はこれに限定されない。３群ベース３０１および３群レンズ保持枠３０２の一方が駆動用コイルを有し、他方がマグネットを有していればよい。 Note that in this embodiment, the third group lens holding frame 302 has a magnet, and the third group base 301 has a driving coil, but the present invention is not limited thereto. One of the third group base 301 and the third group lens holding frame 302 may have a driving coil, and the other may have a magnet.
３群レンズ保持枠３０２と３群ベース３０１との間には、ボール（転動部材）３０５ａ，３０５ｂ，３０５ｃが設けられている。ボール３０５ａ，３０５ｂ，３０５ｃはそれぞれ、保持枠側ボール支持部３０２ａ，３０２ｂ，３０２ｃ、およびベース側ボール支持部３０１ｃ，３０１ｄ，３０１ｅと当接し、転動自由に支持されている。各ボール支持部は、３群レンズ保持枠３０２の駆動中にボール３０５ａ，３０５ｂ，３０５ｃがＸ軸方向およびＹ軸方向において接触しないように各ボールを支持している。 Balls (rolling members) 305a, 305b, and 305c are provided between the third group lens holding frame 302 and the third group base 301. The balls 305a, 305b, and 305c are in contact with the holding frame side ball support parts 302a, 302b, and 302c, and the base side ball support parts 301c, 301d, and 301e, respectively, and are supported so as to freely roll. Each ball support section supports each ball so that the balls 305a, 305b, and 305c do not come into contact with each other in the X-axis direction and the Y-axis direction while the third group lens holding frame 302 is being driven.
３群レンズ保持枠３０２は、弾性部材３０４ａ，３０４ｂによって３群ベース３０１と繋がっており、Ｚ軸方向へ浮くことがないように規制されている。本実施形態では、弾性部材３０４ａ，３０４ｂの一例として、コイルばねが用いられている。なお、弾性部材の数は３つ以上であってもよい。 The third group lens holding frame 302 is connected to the third group base 301 by elastic members 304a and 304b, and is regulated so as not to float in the Z-axis direction. In this embodiment, coil springs are used as an example of the elastic members 304a and 304b. Note that the number of elastic members may be three or more.
センサホルダ３０６は、３群ベース３０１にスナップフィットで係止されている。ＦＰＣ３０７に搭載されている位置検出手段３０７Ｙ，３０７Ｐはそれぞれ、センサホルダ３０６のセンサ保持部３０６Ｙ，３０６Ｐに圧入されることにより固定され、マグネット３０２Ｙ，３０２Ｐの変位量を検出することができる。本実施形態では、位置検出手段３０７Ｙ，３０７Ｐの一例として、ホール素子が用いられている。 The sensor holder 306 is secured to the third group base 301 with a snap fit. Position detection means 307Y and 307P mounted on the FPC 307 are fixed by being press-fitted into the sensor holding parts 306Y and 306P of the sensor holder 306, respectively, and can detect the amount of displacement of the magnets 302Y and 302P. In this embodiment, Hall elements are used as an example of the position detection means 307Y, 307P.
ボール３０５ａ，３０５ｂ，３０５ｃは、３群レンズＬ３１を取り囲む位置に配置される。具体的には、可動範囲内におけるいかなる状態においても３群レンズ保持枠３０２の重心がボール３０５ａ，３０５ｂ，３０５ｃによって形成される三角形の内側に存在することが望ましい。また、弾性部材３０４ａ，３０４ｂによる合力の作用点もボール３０５ａ，３０５ｂ，３０５ｃによって形成される三角形の内側に存在することが望ましい。弾性部材が３つ以上の場合も同様である。従来、３つのボールは、光軸を通り、光軸方向から見た場合の鏡筒枠部材５０１の矩形短辺方向に平行な面（ＸＺ面）に対して対称な位置に配置されている。本実施形態では、３つのボールをＸＺ面に対して非対称な位置に配置することにより、レンズ鏡筒１００の厚み方向（Ｘ軸方向）への薄型化を実現している。 Balls 305a, 305b, and 305c are arranged at positions surrounding the third lens group L31. Specifically, it is desirable that the center of gravity of the third group lens holding frame 302 exists inside the triangle formed by the balls 305a, 305b, and 305c in any state within the movable range. Further, it is desirable that the point of action of the resultant force by the elastic members 304a, 304b also exists inside the triangle formed by the balls 305a, 305b, 305c. The same applies when there are three or more elastic members. Conventionally, the three balls are arranged at symmetrical positions with respect to a plane (XZ plane) that passes through the optical axis and is parallel to the short side direction of the rectangle of the lens barrel frame member 501 when viewed from the optical axis direction. In this embodiment, by arranging the three balls at asymmetrical positions with respect to the XZ plane, the lens barrel 100 is made thinner in the thickness direction (X-axis direction).
３群レンズ保持枠３０２の可動範囲は光学機器の性能（敏感度、レンズ焦点距離、絞り値および防振性能など）により決定される。本実施形態では、３群レンズＬ３１の中心がレンズ鏡筒１００の光軸を中心とした半径１ｍｍの円の内部で動く領域に設定されている。また、３群レンズ保持枠３０２は駆動中、ボール３０５ａ，３０５ｂ，３０５ｃおよび弾性部材３０４ａ，３０４ｂ以外の部材と接触することなく、Ｘ軸方向およびＹ軸方向への動きを規制されないようにする必要がある。保持枠側ボール支持部３０２ａ，３０２ｂ，３０２ｃはＸ軸方向へ突出しているため、３群ベース３０１の壁部も保持枠側ボール支持部３０２ａ，３０２ｂ，３０２ｃを避けるように突出させる必要がある。 The movable range of the third group lens holding frame 302 is determined by the performance of the optical device (sensitivity, lens focal length, aperture value, anti-shake performance, etc.). In this embodiment, the center of the third group lens L31 is set in a region that moves within a circle with a radius of 1 mm centered on the optical axis of the lens barrel 100. Furthermore, during driving, the third group lens holding frame 302 must not come into contact with any member other than the balls 305a, 305b, 305c and the elastic members 304a, 304b, so that its movement in the X-axis direction and the Y-axis direction is not restricted. There is. Since the holding frame side ball support parts 302a, 302b, 302c protrude in the X-axis direction, the wall of the third group base 301 also needs to protrude so as to avoid the holding frame side ball support parts 302a, 302b, 302c.
図７は、保持枠側ボール支持部３０２ｃの周辺を表す図６の領域Ａの拡大図である。図７（ａ）は図６の状態を示しており、図７（ｂ）は３群レンズ保持枠３０２が３群ベース３０１の突出部３０１ｇに近づく方向へ最大量駆動した状態を示している。なお、図７では、図６では図示されていないＦＰＣ３０７と鏡筒枠部材５０１が図示されている。図８は、保持枠側ボール支持部３０２ｃ付近の側面図である。図８（ａ）はＦＰＣ３０７が装着されている状態を示しており、図８（ｂ）はＦＰＣ３０７を取り外した状態を示している。 FIG. 7 is an enlarged view of area A in FIG. 6 showing the periphery of the holding frame side ball support part 302c. 7(a) shows the state shown in FIG. 6, and FIG. 7(b) shows a state in which the third group lens holding frame 302 has been driven by the maximum amount in the direction approaching the protrusion 301g of the third group base 301. Note that, in FIG. 7, the FPC 307 and the lens barrel frame member 501, which are not shown in FIG. 6, are shown. FIG. 8 is a side view of the vicinity of the ball support portion 302c on the holding frame side. FIG. 8(a) shows a state in which the FPC 307 is attached, and FIG. 8(b) shows a state in which the FPC 307 is removed.
矩形形状の基準面３０１ｆに対する突出部（図７（ａ）のハッチング部）３０１ｇの突出量をＬ、保持枠側ボール支持部３０２ｃのＸ軸方向の大きさをＤ、突出部３０１ｇの壁部の厚みをＴとすると、Ｌ＜Ｄ＋Ｔの関係が成立する。従来では、突出部３０１ｇを避けるように基準面３０１ｆから突出量Ｌと製造誤差余裕だけオフセットした位置に鏡筒枠部材５０１の内壁が存在し、内壁から鏡筒枠部材５０１の厚みを足すことでレンズ鏡筒１００のサイズが決定される。
また、を設ける必要がある。
The amount of protrusion of the protruding portion (hatched portion in FIG. 7(a)) 301g with respect to the rectangular reference surface 301f is L, the size of the holding frame side ball support portion 302c in the X-axis direction is D, and the wall portion of the protruding portion 301g is When the thickness is T, the relationship L<D+T holds true. Conventionally, the inner wall of the lens barrel frame member 501 is located at a position offset from the reference surface 301f by the protrusion amount L and manufacturing error margin to avoid the protrusion 301g, and by adding the thickness of the lens barrel frame member 501 from the inner wall. The size of the lens barrel 100 is determined.
It is also necessary to provide
本実施形態では、コネクタ部３０７ａと突出部３０１ｇが厚み方向（Ｘ軸方向）において重なるように、突出部３０１ｇを鏡筒枠部材５０１に設けられたコネクタ部３０７ａの排出用の貫通孔５０１ｃに挿入させる。これにより、鏡筒枠部材５０１の厚み方向（Ｘ軸方向）へのサイズを小さくすることが可能となる。本実施形態では、製造誤差余裕と鏡筒枠部材５０１の厚み分だけＸ軸方向へのサイズを小さくすることができる。また、鏡筒枠部材５０１に突出部３０１ｇを避けるための新たな貫通孔や薄肉部を設ける必要がないため、サイズを小さくすることによる強度の低下を抑えることが可能となる。 In this embodiment, the protruding part 301g is inserted into the discharge through hole 501c of the connector part 307a provided in the lens barrel frame member 501 so that the connector part 307a and the protruding part 301g overlap in the thickness direction (X-axis direction). let This makes it possible to reduce the size of the lens barrel frame member 501 in the thickness direction (X-axis direction). In this embodiment, the size in the X-axis direction can be reduced by the manufacturing error margin and the thickness of the lens barrel frame member 501. Further, since there is no need to provide a new through hole or thin wall portion in the lens barrel frame member 501 to avoid the protrusion 301g, it is possible to suppress a decrease in strength due to a reduction in size.
また、本実施形態では、突出部３０１ｇに貫通孔３０１ｈを設け、３群レンズ保持枠３０２がＸ軸方向へ最大量駆動した状態で保持枠側ボール支持部３０２ｃから製造誤差余裕分だけオフセットした位置にレンズ鏡筒１００の最外形を形成することができる。これにより、レンズ鏡筒１００の薄型化可能である。このとき、コネクタ部３０７ａが貫通孔３０１ｈに入り込み、３群レンズ保持枠３０２と接触することを防ぐために、保持枠側ボール支持部３０２ｃの一部（図７（ｂ）のハッチング部）を切り欠き、突出部３０１ｇに壁（図８（ｂ）のハッチング部）を形成している。 Further, in this embodiment, a through hole 301h is provided in the protrusion 301g, and the position is offset from the holding frame side ball support part 302c by a manufacturing error margin when the third group lens holding frame 302 is driven by the maximum amount in the X-axis direction. The outermost shape of the lens barrel 100 can be formed. Thereby, the lens barrel 100 can be made thinner. At this time, in order to prevent the connector part 307a from entering the through hole 301h and coming into contact with the third group lens holding frame 302, a part of the holding frame side ball support part 302c (the hatched part in FIG. 7(b)) is cut out. , a wall (hatched portion in FIG. 8(b)) is formed on the protruding portion 301g.
以上、本発明の好ましい実施形態について説明したが、本発明はこれらの実施形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。 Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the invention.
Ｌ３１，Ｌ３２ ３群レンズ（光学素子）
１００ レンズ鏡筒
３００ 像振れ補正ユニット（像振れ補正手段）
３０１ ベース部材
３０１ｇ 突出部
３０２ ３群レンズ保持枠（保持部材）
３０２ａ，３０２ｂ，３０２ｃ 保持枠側ボール支持部（支持部）
３０２Ｙ，３０２Ｐ マグネット（駆動手段）
３０３Ｙ，３０３Ｐ 駆動用コイル（駆動手段）
３０５ａ，３０６ｂ，３０５ｃ ボール（転動部材）
３０７ フレキシブル基板（制御配線手段）
３０７ａ 接続部
５０１ 鏡筒枠部材（収納部材）
５０１ｃ 貫通孔
L31, L32 3rd group lens (optical element)
100 Lens barrel 300 Image shake correction unit (image shake correction means)
301 Base member 301g Projection portion 302 3rd group lens holding frame (holding member)
302a, 302b, 302c Holding frame side ball support part (support part)
302Y, 302P Magnet (driving means)
303Y, 303P Drive coil (drive means)
305a, 306b, 305c Ball (rolling member)
307 Flexible board (control wiring means)
307a Connection part 501 Lens barrel frame member (storage member)
501c through hole
Claims (7)
外部機器に接続するための接続部を備えると共に、前記駆動手段に接続される制御配線手段と、
前記制御配線手段を外部に排出するための貫通孔を備えると共に、前記ベース部材を固定する収納部材とを有し、
前記保持部材は、前記転動部材を支持する支持部を備え、
前記ベース部材は、前記支持部の大きさに応じて前記第１方向へ突出する突出部を備え、
前記突出部は、前記収納部材の厚み方向において前記接続部と重なるように前記貫通孔に挿入されていることを特徴とするレンズ鏡筒。 a base member that holds a holding member that holds an optical element movably in a first direction and a second direction that are perpendicular to the optical axis and orthogonal to each other; a rolling member that is disposed between the holding member and the base member; , and an image stabilization means comprising a driving means for driving the holding member;
a control wiring means that includes a connection part for connecting to an external device and is connected to the drive means;
It has a through hole for discharging the control wiring means to the outside, and a storage member for fixing the base member,
The holding member includes a support portion that supports the rolling member,
The base member includes a protrusion that protrudes in the first direction depending on the size of the support part,
The lens barrel is characterized in that the protruding portion is inserted into the through hole so as to overlap with the connecting portion in the thickness direction of the storage member.
前記マグネットと前記コイルのうち一方は前記保持部材に固定され、他方は前記ベース部材に固定されることを特徴とする請求項１に記載のレンズ鏡筒。 The driving means includes a magnet and a coil,
The lens barrel according to claim 1, wherein one of the magnet and the coil is fixed to the holding member, and the other is fixed to the base member.
前記支持部の一部は、切り欠かれ、
前記突出部は、前記保持部材との干渉を避けるための壁部を備えることを特徴とする請求項１又は２に記載のレンズ鏡筒。 The base member includes a hole to avoid interference with the support part,
A portion of the support portion is cut out,
3. The lens barrel according to claim 1, wherein the protrusion includes a wall for avoiding interference with the holding member.
Ｌ＜Ｄ＋Ｔ
なる関係が成立することを特徴とする請求項１乃至４の何れか一項に記載のレンズ鏡筒。 When the protrusion amount of the protrusion is L, the size of the support part in the first direction is D, and the thickness of the wall of the protrusion is T,
L<D+T
5. The lens barrel according to claim 1, wherein the following relationship holds true.
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