JP6297433B2 - Lens drive device - Google Patents

Lens drive device Download PDF

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JP6297433B2
JP6297433B2 JP2014135439A JP2014135439A JP6297433B2 JP 6297433 B2 JP6297433 B2 JP 6297433B2 JP 2014135439 A JP2014135439 A JP 2014135439A JP 2014135439 A JP2014135439 A JP 2014135439A JP 6297433 B2 JP6297433 B2 JP 6297433B2
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support member
optical axis
movable support
lens
lens frame
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JP2016014703A (en
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治可 松久
治可 松久
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Nidec Copal Corp
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Description

本発明は、レンズ駆動装置に関するものである。   The present invention relates to a lens driving device.

コイルとマグネットからなる電磁駆動式の駆動部を備えるレンズ駆動装置が知られている。このようなレンズ駆動装置には、レンズ枠を光軸方向に沿って駆動するオートフォーカス用の駆動装置と、レンズ枠を光軸に交差する方向に駆動する手振れ補正用の駆動装置がある。   2. Description of the Related Art A lens driving device including an electromagnetic driving type driving unit including a coil and a magnet is known. Such a lens driving device includes an autofocus driving device that drives the lens frame along the optical axis direction, and a camera shake correction driving device that drives the lens frame in a direction intersecting the optical axis.

下記特許文献１に記載された従来技術は、オートフォーカス用レンズ駆動装置全体を、光軸に直交し、かつ互いに直交する第１の方向（Ｘ方向）及び第２の方向（Ｙ方向）に移動させることにより、手振れ補正を行うようにした手振れ補正装置であって、オートフォーカス用レンズ駆動装置の底面部で離間して配置されたベースと、このベースの外周部で一端が固定され、光軸に沿って延在し、オートフォーカス用レンズ駆動装置全体を第１の方向（Ｘ方向）及び第２の方向（Ｙ方向）に揺動可能に支持する複数本のサスペンションワイヤーを備えている。   The prior art described in the following Patent Document 1 moves the entire autofocus lens driving device in a first direction (X direction) and a second direction (Y direction) that are orthogonal to the optical axis and orthogonal to each other. Is a camera shake correction device configured to perform camera shake correction, and a base that is spaced apart from the bottom surface portion of the autofocus lens driving device and one end fixed at the outer peripheral portion of the base, and the optical axis And a plurality of suspension wires that support the entire autofocus lens driving device so as to be swingable in a first direction (X direction) and a second direction (Y direction).

また、この従来技術は、フォーカスコイルが周囲に巻かれたレンズ枠が、オートフォーカス用の板バネを介してレンズ枠の周囲に配置されるマグネットホルダに支持されており、レンズ枠の前端を支持する板バネの外周部にサスペンションワイヤーの前端が固定されている。これによりオートフォーカス用レンズ駆動装置は、板バネを介してレンズ枠を弾性支持するマグネットホルダが光軸方向に延在する複数のサスペンションワイヤーの前端に宙吊り状態で支持されている。   In this prior art, the lens frame around which the focus coil is wound is supported by a magnet holder that is arranged around the lens frame via a leaf spring for autofocus, and supports the front end of the lens frame. The front end of the suspension wire is fixed to the outer periphery of the leaf spring. Accordingly, in the autofocus lens driving device, the magnet holder that elastically supports the lens frame via the leaf spring is supported in a suspended state at the front ends of the plurality of suspension wires extending in the optical axis direction.

特開２０１１−６５１４０号公報JP 2011-65140 A

前述した従来のレンズ駆動装置は、オートフォーカス用レンズ駆動装置に光軸方向に沿った外力が作用すると、これを宙吊り状に支持するサスペンションワイヤーに座屈荷重が加わることになり、過大な外力が加わった場合にはサスペンションワイヤーが破損する虞がある。これに対処するために、サスペンションワイヤーの先端が固定される板バネにサスペンションワイヤーに加わる圧縮力を弾性的に吸収する腕部を設けることがなされている。   In the conventional lens driving device described above, when an external force along the optical axis acts on the lens driving device for autofocus, a buckling load is applied to the suspension wire that supports the lens suspension device in a suspended state, and an excessive external force is applied. If added, the suspension wire may be damaged. In order to cope with this, an arm portion that elastically absorbs a compressive force applied to the suspension wire is provided on a leaf spring to which the tip of the suspension wire is fixed.

しかしながら、このような腕部を設けると、手ぶれ補正に伴うサスペンションワイヤーの揺動によって板バネが振動しやすくなり、板バネ起因の共振や発振によってレンズ枠の動きが不安定になる問題が生じる。特に、レンズ駆動装置の小型化・軽量化の要求によって駆動部が小型化されて推力が小さくなっており、これに対応するために板バネの力量を弱くする必要があることから、板バネの力量に影響を及ぼすこと無く、板バネ起因の共振や発振を抑制することが求められている。   However, when such an arm portion is provided, the leaf spring is likely to vibrate due to the swing of the suspension wire accompanying the camera shake correction, and there arises a problem that the movement of the lens frame becomes unstable due to resonance and oscillation caused by the leaf spring. In particular, due to the demand for smaller and lighter lens drive devices, the drive unit has been reduced in size and the thrust has been reduced. In order to cope with this, it is necessary to weaken the force of the leaf spring. There is a need to suppress resonance and oscillation caused by a leaf spring without affecting the force.

本発明は、このような問題に対処することを課題の一例とするものである。すなわち、板バネの力量に影響を及ぼすこと無く板バネ起因の共振や発振を抑止してレンズ枠の動きを安定化させること、等が本発明の目的である。   This invention makes it an example of a subject to cope with such a problem. That is, an object of the present invention is to stabilize the movement of the lens frame by suppressing resonance and oscillation caused by the leaf spring without affecting the force of the leaf spring.

このような目的を達成するために、本発明によるレンズ駆動装置は、以下の構成を具備するものである。
レンズ枠と、該レンズ枠を光軸周りに囲む可動支持部材と、光軸方向の駆動に対して前記レンズ枠を前記可動支持部材に弾性支持する板バネと、前記可動支持部材の後方に配置されるベース支持部材と、前記ベース支持部材から光軸に沿って立設され光軸に交差する方向の駆動に対して前記可動支持部材を弾性支持する支持ワイヤーと、前記レンズ枠を光軸方向と光軸に交差する方向の一方又は両方に駆動する駆動部とを備え、前記板バネは、前記支持ワイヤーの先端に固定される角部と、前記可動支持部材の前端に固定される固定部と、該固定部と前記角部とを弾性的に連結する一対の腕部と、該一対の腕部間を連結する連結部とを備え、前記腕部は前記固定部の両端から一つの前記角部に向けて延びており、前記連結部は一対の前記腕部間にアーチ状に架けられ、前記角部と前記連結部との間に開口が形成されており、前記可動支持部材の前端には、前記腕部との間に間隙を設ける段部と前記連結部に沿って凹んだ粘着性部材溜まりが設けられ、前記粘着性部材溜まりに溜めた粘着性部材を前記連結部に接触させていることを特徴とするレンズ駆動装置。
In order to achieve such an object, a lens driving device according to the present invention has the following configuration.
A lens frame, a movable support member that surrounds the lens frame around the optical axis, a leaf spring that elastically supports the lens frame on the movable support member for driving in the optical axis direction, and a rear side of the movable support member A base support member, a support wire that is erected from the base support member along the optical axis and that crosses the optical axis, and elastically supports the movable support member, and the lens frame in the optical axis direction. And a drive unit that drives in one or both of the directions intersecting the optical axis, and the leaf spring is fixed to a front end of the movable support member and a corner fixed to the front end of the support wire A pair of arm portions that elastically connect the fixing portion and the corner portion, and a connection portion that connects the pair of arm portions, and the arm portion is connected to the one end from the both ends of the fixing portion. It extends toward the corner, and the connecting portion is a pair of the arm portions The hung in an arch shape, and the corner portion has an opening formed between the connecting portion, the front end of the movable support member, the connecting portion and the stepped portion providing a gap between the arm portion A lens driving device comprising: an adhesive member reservoir that is recessed along the adhesive member, wherein the adhesive member stored in the adhesive member reservoir is in contact with the connecting portion.

本発明の実施形態に係るレンズ駆動装置の分解斜視図である。It is a disassembled perspective view of the lens drive device concerning the embodiment of the present invention. 本発明の実施形態に係る全体構成を示した説明図（（ａ）が平面図、（ｂ）が（ａ）のＸ−Ｘ断面図）である。It is explanatory drawing ((a) is a top view, (b) is XX sectional drawing of (a)) which showed the whole structure which concerns on embodiment of this invention. 本発明の実施形態に係るレンズ駆動装置における可動支持部材と板バネを示した説明図（（ａ）が前側板バネ１１，１２をレンズ枠２と可動支持部材１０に装着した状態を示した平面図であり、（ｂ）が前側板バネ１１，１２を外した状態のレンズ枠２と可動支持部材１０の平面図）である。An explanatory view showing a movable support member and a leaf spring in a lens drive device concerning an embodiment of the present invention ((a) is a plane showing a state where front blade springs 11 and 12 are attached to lens frame 2 and movable support member 10 (B) is a plan view of the lens frame 2 and the movable support member 10 with the front leaf springs 11 and 12 removed. 図３の要部を詳細に示した説明図（図４（ａ）が平面図、図４（ｂ）が図４（ａ）におけるＸ−Ｘ断面図）である。FIG. 4A is an explanatory diagram showing in detail the main part of FIG. 3 (FIG. 4A is a plan view, and FIG. 4B is a sectional view taken along line XX in FIG. 本発明の実施形態に係るレンズ駆動装置を備えた電子機器を示した説明図（（ａ）がカメラ、（ｂ）が携帯情報端末）である。BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing ((a) is a camera, (b) is a portable information terminal) which showed the electronic device provided with the lens drive device which concerns on embodiment of this invention.

以下、図面を参照して本発明の実施形態を説明する。図１は、本発明の実施形態に係るレンズ駆動装置の分解斜視図を示しており、図２は、本発明の実施形態に係る全体構成を示している（（ａ）が平面図、（ｂ）が（ａ）のＸ−Ｘ断面図）。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an exploded perspective view of a lens driving device according to an embodiment of the present invention, and FIG. 2 shows an overall configuration according to the embodiment of the present invention ((a) is a plan view, (b) ) Is an XX sectional view of (a).

レンズ駆動装置１は、レンズ枠２、支持部３、駆動部４を備えている。レンズ枠２は、図示省略したレンズバレルを取り付けるレンズバレル取り付け口２Ｓを備える。レンズバレル取り付け口２Ｓの中心軸がレンズの光軸になる。以後、レンズの物体側を「前」として説明し、レンズの像側を「後」として説明する。図においては、光軸方向をＺ方向で示し、光軸に交差する方向をＸ，Ｙ方向で示す。   The lens driving device 1 includes a lens frame 2, a support unit 3, and a driving unit 4. The lens frame 2 includes a lens barrel attachment port 2S for attaching a lens barrel (not shown). The central axis of the lens barrel mounting port 2S is the optical axis of the lens. Hereinafter, the object side of the lens will be described as “front”, and the image side of the lens will be described as “rear”. In the figure, the optical axis direction is indicated by the Z direction, and the directions intersecting the optical axis are indicated by the X and Y directions.

駆動部４は、レンズ枠２を光軸方向と光軸に交差する方向の一方又は両方に駆動する。図示の例では、駆動部４は、レンズ枠２の胴部に光軸周りに巻かれたフォーカスコイル２０、レンズ枠２の周囲に配置される４個のマグネット２１、４個のマグネット２１のうち磁界の方向が直交する２個の後方にそれぞれ配置される手振れ補正コイル２２（２２Ａ，２２Ｂ）を備えている。   The drive unit 4 drives the lens frame 2 in one or both of the optical axis direction and the direction intersecting the optical axis. In the illustrated example, the drive unit 4 includes a focus coil 20 wound around the body of the lens frame 2 around the optical axis, four magnets 21 arranged around the lens frame 2, and four magnets 21. A camera shake correction coil 22 (22A, 22B) is provided behind each of the two magnetic field directions orthogonal to each other.

支持部３は、レンズ枠２を駆動部４の駆動方向に対して弾性支持する。駆動部４の推力と支持部３の弾性力の釣り合いでレンズ枠２の位置が制御される。図示の例では、支持部３は、可動支持部材１０、前側板バネ（板バネ）１１，１２、後側板バネ（板バネ）１３、支持ワイヤー１４、ベース支持部材１５を備えている。可動支持部材１０は、レンズ枠２を光軸周りに囲んで、レンズ枠２を光軸方向に弾性支持し、自身が光軸と交差する方向に弾性支持される。図示の可動支持部材１０は光軸周りに角部を有する矩形状になっており、角部が前述したマグネット２１を保持するマグネット保持部１０Ｐになっている。   The support unit 3 elastically supports the lens frame 2 in the driving direction of the driving unit 4. The position of the lens frame 2 is controlled by a balance between the thrust of the drive unit 4 and the elastic force of the support unit 3. In the illustrated example, the support unit 3 includes a movable support member 10, front plate springs (plate springs) 11 and 12, a rear plate spring (plate spring) 13, a support wire 14, and a base support member 15. The movable support member 10 surrounds the lens frame 2 around the optical axis, elastically supports the lens frame 2 in the optical axis direction, and is elastically supported in a direction intersecting the optical axis. The illustrated movable support member 10 has a rectangular shape having a corner around the optical axis, and the corner serves as a magnet holding portion 10P that holds the magnet 21 described above.

可動支持部材１０の前端取り付け部１０Ａ，１０Ｂには、前側板バネ１１の外側取り付け部１１Ａ，１１Ｂが取り付けられ、前側板バネ１１の内側取り付け部１１Ｃがレンズ枠２の前面２Ａに設けられる前端取り付け部２Ａ１に取り付けられる。可動支持部材１０の前端取り付け部１０Ｃ，１０Ｄには、前側板バネ１２の外側取り付け部１２Ｂ，１２Ａが取り付けられ、前側板バネ１２の内側取り付け部１２Ｃがレンズ枠２の前面２Ａに設けられる前端取り付け部２Ａ２に取り付けられる。   Front end attachment portions 10A and 10B of the movable support member 10 are attached with outer attachment portions 11A and 11B of the front leaf spring 11, and an inner attachment portion 11C of the front leaf spring 11 is provided on the front surface 2A of the lens frame 2. It is attached to the part 2A1. Front end attachment portions 10C, 10D of the movable support member 10 are attached with outer attachment portions 12B, 12A of the front leaf spring 12, and an inner attachment portion 12C of the front leaf spring 12 is provided on the front surface 2A of the lens frame 2. It is attached to the part 2A2.

前側板バネ１１は、外側取り付け部１１Ａ，１１Ｂと内側取り付け部１１Ｃとの間に弾性部１１Ｄ，１１Ｅを備えており、同様に、前側板バネ１２は、外側取り付け部１２Ａ，１２Ｂと内側取り付け部１２Ｃとの間に弾性部１２Ｅ，１２Ｄを備えている。   The front leaf spring 11 includes elastic portions 11D and 11E between the outer attachment portions 11A and 11B and the inner attachment portion 11C. Similarly, the front leaf spring 12 includes the outer attachment portions 12A and 12B and the inner attachment portion. The elastic parts 12E and 12D are provided between 12C.

可動支持部材１０の後端取り付け部１０Ｅには、後側板バネ１３の外側取り付け部１３Ａが取り付けられ、後側板バネ１３の内側取り付け部１３Ｂがレンズ枠２の後面に設けられる後側取り付け部２Ｃに取り付けられる。後側板バネ１３は、外側取り付け部１３Ａと内側取り付け部１３Ｂの間に弾性部１３Ｃを備えている。   An outer attachment portion 13A of the rear leaf spring 13 is attached to the rear end attachment portion 10E of the movable support member 10, and an inner attachment portion 13B of the rear leaf spring 13 is attached to the rear attachment portion 2C provided on the rear surface of the lens frame 2. It is attached. The rear leaf spring 13 includes an elastic portion 13C between the outer attachment portion 13A and the inner attachment portion 13B.

レンズ枠２の前側が、弾性部１１Ｄ，１１Ｅ，１２Ｄ，１２Ｅを備える前板バネ１１，１２を介して可動支持部材１０の前側に支持されており、レンズ枠２の後側が弾性部１３Ｃを備える後側板バネ１３を介して可動支持部材１０の後側に支持されている。これによって、光軸方向の駆動に対してはレンズ枠２が可動支持部材１０に弾性的に支持されている。   The front side of the lens frame 2 is supported on the front side of the movable support member 10 via the front leaf springs 11 and 12 including the elastic portions 11D, 11E, 12D, and 12E, and the rear side of the lens frame 2 includes the elastic portion 13C. It is supported on the rear side of the movable support member 10 via the rear leaf spring 13. Thus, the lens frame 2 is elastically supported by the movable support member 10 for driving in the optical axis direction.

ベース支持部材１５は、レンズ枠２及び可動支持部材１０の後方に配置され、底板１５Ｂにレンズを通った光を通過させる中央開口１５Ａを備えている。図示の例では、ベース支持部材１５は、可動支持部材１０と同様に、光軸周りに角部を有する矩形状になっており、角部にワイヤー保持部１５Ｃを備えている。   The base support member 15 is disposed behind the lens frame 2 and the movable support member 10, and includes a central opening 15A through which light passing through the lens passes through the bottom plate 15B. In the illustrated example, the base support member 15 has a rectangular shape with corners around the optical axis, like the movable support member 10, and includes wire holding portions 15C at the corners.

支持ワイヤー１４（１４Ａ，１４Ｂ，１４Ｃ，１４Ｄ）は、湾曲に対して弾性を有しており、後端がベース支持部材１５のワイヤー保持部１５Ｃに保持されて光軸に沿って立設されている。そして、支持ワイヤー１４Ａ，１４Ｂ，１４Ｃ，１４Ｄの前端は、可動支持部材１０に取り付けられている前側板バネ１１，１２の外側取り付け部１１Ａ，１２Ａ，１１Ｂ，１２Ｂに取り付けられており、支持ワイヤー１４がレンズ枠２を弾性支持する可動支持部材１０を宙吊り状に支持している。これによって、ベース支持部材１５が可動支持部材１０を光軸に交差する方向の駆動に対して弾性的に支持しており、レンズ枠２は、支持ワイヤー１４の弾性的な湾曲によって光軸に交差する方向の駆動に対して弾性的に支持されている。   The support wire 14 (14A, 14B, 14C, 14D) has elasticity with respect to the curvature, and the rear end is held by the wire holding portion 15C of the base support member 15 and is erected along the optical axis. Yes. The front ends of the support wires 14A, 14B, 14C, 14D are attached to the outer attachment portions 11A, 12A, 11B, 12B of the front leaf springs 11, 12 attached to the movable support member 10, and the support wire 14 Supports the movable support member 10 that elastically supports the lens frame 2 in a suspended manner. As a result, the base support member 15 elastically supports the movable support member 10 with respect to driving in the direction intersecting the optical axis, and the lens frame 2 intersects the optical axis due to the elastic curve of the support wire 14. It is elastically supported with respect to the driving in the direction.

ベース支持部材１５は、外部接続端子１５Ｆを備え、底板１５Ｂに外部接続端子１５Ｆと接続する回路を備えることで、駆動部４への給電端部を構成している。独立した複数の端子を有する外部接続端子１５Ｆの一部は、底板１５Ｂが備える回路を経由してベース支持部材１５のコイル支持部１５Ｄに支持される手振れ補正コイル２２（２２Ａ，２２Ｂ）の両端に接続されており、この手振れ補正コイル２２の給電端子になっている。   The base support member 15 includes an external connection terminal 15 </ b> F, and includes a circuit connected to the external connection terminal 15 </ b> F on the bottom plate 15 </ b> B, thereby configuring a power feeding end to the drive unit 4. Part of the external connection terminal 15F having a plurality of independent terminals is provided at both ends of the camera shake correction coil 22 (22A, 22B) supported by the coil support portion 15D of the base support member 15 via a circuit provided in the bottom plate 15B. It is connected and serves as a power supply terminal of the camera shake correction coil 22.

また、外部接続端子１５Ｆの一部は、底板１５Ｂが備える回路からワイヤー保持部１５Ｃに保持された支持ワイヤー１４Ａ，１４Ｂと前側板バネ１１，１２を経由してフォーカスコイル２０の両端に接続されており、このフォーカスコイル２０の給電端子になっている。   A part of the external connection terminal 15F is connected to both ends of the focus coil 20 from the circuit provided in the bottom plate 15B via the support wires 14A and 14B held by the wire holding portion 15C and the front leaf springs 11 and 12. The focus coil 20 is a power supply terminal.

更に、外部接続端子１５Ｆの一部は、底部１５Ｂが備える回路を経由してベース支持部材１５のセンサー支持部１５Ｅに支持される位置検出センサー６（６Ａ，６Ｂ）に接続されており、位置検出センサー６（６Ａ，６Ｂ）の入出力端子になっている。   Further, a part of the external connection terminal 15F is connected to the position detection sensor 6 (6A, 6B) supported by the sensor support portion 15E of the base support member 15 via a circuit provided in the bottom portion 15B. It is an input / output terminal of the sensor 6 (6A, 6B).

フォーカスコイル２０と手振れ補正コイル２２への給電をそれぞれ独立して制御することで、レンズ枠２のフォーカス制御と手振れ補正制御をそれぞれ行うことができる。その際、手振れ補正制御は位置検出センサー６（６Ａ，６Ｂ）の検出信号によるフィードバック制御がなされる。ベース支持部材１５の後方にはフィルター枠Ｆが装着され、更にその後方には図示省略した撮像素子が装着される。また、可動支持部材１０の外周を囲むように中央開口５Ａを備える保護枠５がベース支持部材１５に装着されている。   By controlling power feeding to the focus coil 20 and the camera shake correction coil 22 independently, focus control and camera shake correction control of the lens frame 2 can be performed. At that time, the camera shake correction control is feedback control based on the detection signal of the position detection sensor 6 (6A, 6B). A filter frame F is mounted behind the base support member 15, and an imaging element (not shown) is mounted behind the filter frame F. A protective frame 5 having a central opening 5 </ b> A is attached to the base support member 15 so as to surround the outer periphery of the movable support member 10.

図３及び図４は、レンズ枠２の周囲に配置される可動支持部材１０と板バネ（前側板バネ１１，１２）を示している。図３（ａ）が前側板バネ１１，１２をレンズ枠２と可動支持部材１０に装着した状態を示した平面図であり、図３（ｂ）が前側板バネ１１，１２を外した状態のレンズ枠２と可動支持部材１０の平面図である。図４は、図３の要部を詳細に示した説明図（図４（ａ）が平面図、図４（ｂ）が図４（ａ）におけるＸ−Ｘ断面図）である。   3 and 4 show the movable support member 10 and the leaf springs (front leaf springs 11 and 12) arranged around the lens frame 2. 3A is a plan view showing a state in which the front leaf springs 11 and 12 are attached to the lens frame 2 and the movable support member 10, and FIG. 3B is a state in which the front leaf springs 11 and 12 are removed. 2 is a plan view of a lens frame 2 and a movable support member 10. FIG. 4A and 4B are explanatory views showing in detail the main part of FIG. 3 (FIG. 4A is a plan view, and FIG. 4B is an XX cross-sectional view in FIG. 4A).

前側板バネ１１，１２の外側取り付け部１１Ａ，１１Ｂ，１２Ａ，１２Ｂは、支持ワイヤー１４の先端に固定される角部４０と、可動支持部材１０の前端に固定される固定部４１と、固定部４１と角部４０とを弾性的に連結する一対の腕部４２と、一対の腕部４２間を連結する連結部４３とを備えている。角部４０は、可動支持部材１０の角部１０Ｈに対応した位置に配置されており、略三角形状の外側取り付け部１１Ａ，１１Ｂ，１２Ａ，１２Ｂの頂点に位置している。固定部４１は、略三角形状の外側取り付け部１１Ａ，１１Ｂ，１２Ａ，１２Ｂの中央部に位置しており、可動支持部材１０の前端取り付け部１０Ａ，１０Ｂ，１０Ｃ，１０Ｄにおける取り付け面１０Ｊに固定されている。   The outer attachment portions 11A, 11B, 12A, and 12B of the front leaf springs 11 and 12 include a corner portion 40 that is fixed to the front end of the support wire 14, a fixing portion 41 that is fixed to the front end of the movable support member 10, and a fixing portion. A pair of arm portions 42 that elastically connect 41 and the corner portion 40 and a connection portion 43 that connects between the pair of arm portions 42 are provided. The corner portion 40 is disposed at a position corresponding to the corner portion 10H of the movable support member 10, and is positioned at the apex of the substantially triangular outer mounting portions 11A, 11B, 12A, and 12B. The fixed portion 41 is located at the center of the substantially triangular outer mounting portions 11A, 11B, 12A, and 12B, and is fixed to the mounting surface 10J of the front end mounting portions 10A, 10B, 10C, and 10D of the movable support member 10. ing.

一対の腕部４２は、略三角形状の外側取り付け部１１Ａ，１１Ｂ，１２Ａ，１２Ｂの外周部に位置しており、可動支持部材１０の前端に固定される固定部４１に対して角部４０の位置を上下に変位できるように、固定部４１と角部４０とを弾性的に連結している。連結部４３は、一対の腕部４２の間をアーチ状に連結しており、連結部４３と角部４０との間には開口が形成されている。   The pair of arm portions 42 are located on the outer peripheral portions of the substantially triangular outer mounting portions 11A, 11B, 12A, and 12B, and the corner portions 40 are located with respect to the fixed portion 41 that is fixed to the front end of the movable support member 10. The fixed portion 41 and the corner portion 40 are elastically connected so that the position can be displaced up and down. The connecting portion 43 connects the pair of arm portions 42 in an arch shape, and an opening is formed between the connecting portion 43 and the corner portion 40.

これに対して、前側板バネ１１，１２の外側取り付け部１１Ａ，１１Ｂ，１２Ａ，１２Ｂが取り付けられる可動支持部材１０の前端取り付け部１０Ａ，１０Ｂ，１０Ｃ，１０Ｄは、角部１０Ｈが平面視で凹状に形成されてその内側が支持ワイヤー１４の配置スペースになっており、その上に前側板バネ１１，１２の角部４０が配置されて支持ワイヤー１４の先端に固定されている。角部１０Ｈの近接位置には、前側板バネ１１，１２の一対の腕部４２の外側に突出するように回転止め凸部１０Ｇが角部１０Ｈ毎に一対設けられ、この回転止め凸部１０Ｇによって前側板バネ１１，１２の腕部４２などが保護されている。   On the other hand, the front end attaching portions 10A, 10B, 10C, and 10D of the movable support member 10 to which the outer attaching portions 11A, 11B, 12A, and 12B of the front leaf springs 11 and 12 are attached have a concave corner portion 10H in a plan view. The inside is a space for arranging the support wire 14, and the corner portions 40 of the front leaf springs 11 and 12 are arranged thereon and fixed to the tip of the support wire 14. A pair of anti-rotation convex portions 10G is provided for each corner portion 10H so as to protrude outside the pair of arm portions 42 of the front side leaf springs 11 and 12 at a position close to the corner portion 10H. The arm portions 42 of the front leaf springs 11 and 12 are protected.

そして、可動支持部材１０の前端取り付け部１０Ａ，１０Ｂ，１０Ｃ，１０Ｄには、前側板バネ１１，１２における一対の腕部４２の下に位置して腕部４２との間に隙間を設ける段部１０Ｋと、前側板バネ１１，１２における連結部４３の下に位置して連結部４３に沿って凹んだ粘着性部材溜まり１０Ｌが設けられている。   The front end attaching portions 10A, 10B, 10C, and 10D of the movable support member 10 are stepped portions that are positioned below the pair of arm portions 42 in the front leaf springs 11 and 12 and have a gap with the arm portions 42. 10K and an adhesive member reservoir 10L which is located below the connecting portion 43 in the front leaf springs 11 and 12 and is recessed along the connecting portion 43 are provided.

可動支持部材１０における段部１０Ｋは、前側板バネ１１，１２の固定部４１が固定される取り付け面１０Ｊから一段下がって形成され、前側板バネ１１，１２における腕部４２の湾曲を許容するだけの凹みを有している。また、粘着性部材溜まり１０Ｌは取り付け面１０Ｊから下がって段部１０Ｋの凹みより更に深さｔだけ深い凹みを有しており、粘着性部材溜まり１０Ｌの外側には取り付け面１０Ｊと面一の高さを有する壁部１０Ｎが設けられている。この壁部１０Ｎは前側板バネ１１，１２の角部４０と連結部４３の間の開口内に位置している。粘着性部材溜まり１０Ｌには振動減衰用の粘着性部材が溜められ、その粘着性部材が粘着性部材溜まり１０Ｌ上に位置する前側板バネ１１，１２の連結部４３に接触するように溜められる。   The step portion 10K in the movable support member 10 is formed one step down from the mounting surface 10J to which the fixing portion 41 of the front plate springs 11 and 12 is fixed, and only allows the bending of the arm portion 42 in the front plate springs 11 and 12. It has a dent. Further, the adhesive member reservoir 10L has a recess which is lower than the recess of the stepped portion 10K and is deeper than the recess 10D. The outer surface of the adhesive member reservoir 10L is flush with the attachment surface 10J. A wall portion 10N having a thickness is provided. The wall portion 10N is located in the opening between the corner portion 40 and the connecting portion 43 of the front leaf springs 11 and 12. An adhesive member for damping vibration is stored in the adhesive member reservoir 10L, and the adhesive member is stored in contact with the connecting portion 43 of the front leaf springs 11 and 12 located on the adhesive member reservoir 10L.

粘着性部材溜まり１０Ｌは、取り付け面１０Ｊとの段差が内壁になっており、壁部１０Ｎとの段差が外壁になっている。更に粘着性部材溜まり１０Ｌは、段部１０Ｋとの段差が左右の壁になっている。このように粘着性部材溜まり１０Ｌは周囲に壁を有する凹みになっているので、その中に溜められて比較的高い粘性を有する振動減衰用の粘着性部材は、外に流れ出ること無く粘着性部材溜まり内に収まった状態を維持することができる。   The adhesive member reservoir 10L has an inner wall at the level difference from the mounting surface 10J and an outer wall at the level difference from the wall 10N. Further, the adhesive member reservoir 10L has left and right walls that are stepped from the stepped portion 10K. Thus, since the adhesive member reservoir 10L is a recess having a wall around it, the vibration damping adhesive member having a relatively high viscosity stored in the reservoir 10L does not flow out to the outside. It is possible to maintain the state of being stored in the pool.

可動支持部材１０の内側に配置されるレンズ枠２には、その周囲四方にストッパー突起２Ｂと振動減衰用の突出部３０を設けており、可動支持部材１０には、そのストッパー突起２Ｂに対応してストッパー受け１０Ｍを設け、突出部３０に対応して凹部３１を設けている。可動支持部材１０に設けられたストッパー受け１０Ｍは、レンズ枠２に設けられたストッパー突起２Ｂが当たることで、可動支持部材１０内でのレンズ枠２の光軸に交差する方向に向けた過剰な動きを規制している。また、可動支持部材１０に設けた凹部３１とその中に突出する突出部３０との間には振動減衰用の粘着性部材が収容され、この粘着性部材によってレンズ枠２の不要な振動を抑制している。   The lens frame 2 arranged on the inner side of the movable support member 10 is provided with stopper projections 2B and vibration-attenuating projections 30 on its four sides, and the movable support member 10 corresponds to the stopper projections 2B. The stopper receiver 10M is provided, and the concave portion 31 is provided corresponding to the protruding portion 30. The stopper support 10 </ b> M provided on the movable support member 10 is excessive in the direction intersecting the optical axis of the lens frame 2 in the movable support member 10 by hitting the stopper projection 2 </ b> B provided on the lens frame 2. The movement is regulated. Moreover, an adhesive member for damping vibration is accommodated between the concave portion 31 provided in the movable support member 10 and the protruding portion 30 protruding therein, and unnecessary vibration of the lens frame 2 is suppressed by this adhesive member. doing.

このような特徴を有するレンズ駆動装置１は、前側板バネ１１，１２が支持ワイヤー１４の先端に固定される角部４０と可動支持部材１０前端に固定される固定部４１とを弾性的に連結する一対の腕部４２を有するので、可動支持部材１０に光軸方向の外力が加わった場合にも腕部４２がこの外力を弾性的に吸収して支持ワイヤー１４に加わる荷重を低減することができる。また、前側板バネ１１，１２が一対の腕部４２間を連結する連結部４３を備えており、可動支持部材１０にはその連結部４３に接触する振動減衰用の粘着性部材を溜める粘着性部材溜まり１０Ｌが設けられているので、支持ワイヤー１４から角部４０を介して一対の腕部４２に伝わる振動を効果的に減衰させることができる。これによって、前側板バネ１１，１２の力量を弱くした場合であっても、板バネ起因の共振や発振を効果的に抑制することができ、レンズ枠２の動きを安定化させることができる。   The lens driving device 1 having such a feature elastically connects the corner portion 40 where the front leaf springs 11 and 12 are fixed to the front end of the support wire 14 and the fixing portion 41 fixed to the front end of the movable support member 10. Therefore, even when an external force in the optical axis direction is applied to the movable support member 10, the arm portion 42 can elastically absorb the external force and reduce the load applied to the support wire 14. it can. Further, the front leaf springs 11 and 12 include a connecting portion 43 that connects the pair of arm portions 42, and the movable support member 10 has an adhesive property that collects a vibration-damping adhesive member that contacts the connecting portion 43. Since the member reservoir 10L is provided, vibration transmitted from the support wire 14 to the pair of arm portions 42 via the corner portion 40 can be effectively attenuated. Accordingly, even when the force of the front leaf springs 11 and 12 is weakened, resonance and oscillation caused by the leaf springs can be effectively suppressed, and the movement of the lens frame 2 can be stabilized.

また、可動支持部材１０に設けられる粘着性部材溜まり１０Ｌは、そこに溜めた振動減衰用の粘着性部材が流れ出にくいように周囲に壁が設けられているので、可動支持部材１０が振動や衝撃を受けた場合にも粘着性部材溜まり１０Ｌ内で粘着性部材を保持して前側板バネ１１，１２に伝わる振動を効果的に減衰させることができる。   Further, the adhesive member reservoir 10L provided on the movable support member 10 is provided with a wall around it so that the vibration-damping adhesive member accumulated therein is less likely to flow out. In the case of receiving the vibration, vibrations transmitted to the front leaf springs 11 and 12 can be effectively damped by holding the adhesive member in the adhesive member reservoir 10L.

また、一対の腕部４２をアーチ状に連結する連結部４３は、振動減衰用の粘着性部材との接触を図る機能に加えて、一対の腕部４２が光軸に交差する方向に変形するのを抑止する補強機能を有しているので、前側板バネ１１，１２の力量を弱くした場合であってもレンズ枠２の振れを効果的に抑止することができる。   Further, the connecting portion 43 that connects the pair of arm portions 42 in an arch shape is deformed in a direction in which the pair of arm portions 42 intersects the optical axis in addition to the function of making contact with the vibration damping adhesive member. Therefore, even when the force of the front leaf springs 11 and 12 is weakened, the lens frame 2 can be effectively prevented from shaking.

図５は、本発明の実施形態に係るレンズ駆動装置１を備えた電子機器を示している。本発明の実施形態に係るレンズ駆動装置１は、図５（ａ）に示したカメラ１００に搭載することで、小型化が可能になると共に、高いオートフォーカス性能或いは手振れ補正性能を得ることができる。また、図５（ｂ）に示した携帯情報端末（携帯電話、スマートフォンなどを含む）２００に搭載することで、機器全体の薄型化、カメラ機能部分の高機能化及び省スペース化が可能になる。   FIG. 5 shows an electronic apparatus including the lens driving device 1 according to the embodiment of the present invention. The lens driving device 1 according to the embodiment of the present invention can be reduced in size and can have high autofocus performance or camera shake correction performance by being mounted on the camera 100 shown in FIG. . Moreover, by mounting on the portable information terminal (including a mobile phone, a smart phone, etc.) 200 shown in FIG. 5B, the entire device can be made thinner, the camera function part can be enhanced, and the space can be saved. .

以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。また、上述の各実施の形態は、その目的及び構成等に特に矛盾や問題がない限り、互いの技術を流用して組み合わせることが可能である。なお、前述した実施形態における粘着性部材は、紫外線硬化樹脂や、熱硬化性樹脂、グリスなどで制振性を有する部材であればよい。   As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. In addition, the above-described embodiments can be combined by utilizing each other's technology as long as there is no particular contradiction or problem in the purpose and configuration. In addition, the adhesive member in embodiment mentioned above should just be a member which has damping property, such as an ultraviolet curable resin, a thermosetting resin, and grease.

１：レンズ駆動装置，２：レンズ枠，２Ａ：前面，
２Ｂ：ストッパー突起，２Ｂ１，２Ｂ２：ストッパー面，
２Ａ１，２Ａ２：前端取り付け部，２Ｓ：レンズバレル取り付け口，
２Ｃ：後側取り付け部，
３：支持部，４：駆動部，５：保護枠，５Ａ：中央開口，
６（６Ａ，６Ｂ）：位置検出センサー，
１０：可動支持部材，１０Ａ，１０Ｂ，１０Ｃ，１０Ｄ：前端取り付け部，
１０Ｅ：後端取り付け部，１０Ｐ：マグネット保持部，
１０Ｆ：外周面，１０Ｇ：回転止め凸部，１０Ｈ：角部，
１０Ｊ：取り付け面，１０Ｋ：段部，１０Ｌ：粘着性部材溜まり，１０Ｎ：壁部，
１０Ｍ：ストッパー面，
１１，１２：前側板バネ（板バネ），
１１Ａ，１１Ｂ，１２Ａ，１２Ｂ：外側取り付け部，
１１Ｃ，１２Ｃ：内側取り付け部，
１１Ｄ，１１Ｅ，１２Ｄ，１２Ｅ：弾性部，
１３：後側板バネ（板バネ），
１３Ａ：外側取り付け部，１３Ｂ：内側取り付け部，
１３Ｃ：弾性部，１４（１４Ａ，１４Ｂ，１４Ｃ，１４Ｄ）：支持ワイヤー，
１５：ベース支持部材，１５Ａ：中央開口，１５Ｂ：底板，
１５Ｃ：ワイヤー保持部，１５Ｄ：コイル支持部，１５Ｅ：センサー支持部，
１５Ｆ：外部接続端子，
２０：フォーカスコイル，２１：マグネット，
２２（２２Ａ，２２Ｂ）：手振れ補正コイル，
３０：突出部，３１：凹部，
４０：角部，４１：固定部，４２：腕部，４３：連結部，
Ｆ：フィルター枠，１００：カメラ，２００：携帯情報端末 1: lens driving device, 2: lens frame, 2A: front surface,
2B: Stopper protrusion, 2B1, 2B2: Stopper surface,
2A1, 2A2: Front end mounting portion, 2S: Lens barrel mounting port,
2C: Rear mounting part,
3: support part, 4: drive part, 5: protective frame, 5A: central opening,
6 (6A, 6B): position detection sensor,
10: movable support member, 10A, 10B, 10C, 10D: front end mounting portion,
10E: Rear end mounting portion, 10P: Magnet holding portion,
10F: outer peripheral surface, 10G: rotation stopper convex portion, 10H: corner portion,
10J: mounting surface, 10K: stepped portion, 10L: adhesive member reservoir, 10N: wall portion,
10M: Stopper surface,
11, 12: Front leaf spring (leaf spring),
11A, 11B, 12A, 12B: outside attachment part,
11C, 12C: inner mounting part,
11D, 11E, 12D, 12E: elastic part,
13: Rear leaf spring (leaf spring),
13A: outside attachment part, 13B: inside attachment part,
13C: Elastic part, 14 (14A, 14B, 14C, 14D): Support wire,
15: Base support member, 15A: Center opening, 15B: Bottom plate,
15C: wire holding part, 15D: coil support part, 15E: sensor support part,
15F: External connection terminal,
20: Focus coil, 21: Magnet,
22 (22A, 22B): camera shake correction coil,
30: Projection, 31: Recess,
40: Corner part, 41: Fixed part, 42: Arm part, 43: Connection part,
F: Filter frame, 100: Camera, 200: Portable information terminal

Claims (5)

レンズ枠と、
該レンズ枠を光軸周りに囲む可動支持部材と、
光軸方向の駆動に対して前記レンズ枠を前記可動支持部材に弾性支持する板バネと、
前記可動支持部材の後方に配置されるベース支持部材と、
前記ベース支持部材から光軸に沿って立設され光軸に交差する方向の駆動に対して前記可動支持部材を弾性支持する支持ワイヤーと、
前記レンズ枠を光軸方向と光軸に交差する方向の一方又は両方に駆動する駆動部とを備え、
前記板バネは、前記支持ワイヤーの先端に固定される角部と、前記可動支持部材の前端に固定される固定部と、該固定部と前記角部とを弾性的に連結する一対の腕部と、該一対の腕部間を連結する連結部とを備え、
前記腕部は前記固定部の両端から一つの前記角部に向けて延びており、前記連結部は一対の前記腕部間にアーチ状に架けられ、前記角部と前記連結部との間に開口が形成されており、
前記可動支持部材の前端には、前記腕部との間に間隙を設ける段部と前記連結部に沿って凹んだ粘着性部材溜まりが設けられ、
前記粘着性部材溜まりに溜めた粘着性部材を前記連結部に接触させていることを特徴とするレンズ駆動装置。 A lens frame,
A movable support member surrounding the lens frame around the optical axis;
A leaf spring that elastically supports the lens frame on the movable support member with respect to driving in the optical axis direction;
A base support member disposed behind the movable support member;
A support wire that elastically supports the movable support member with respect to driving in a direction standing from the base support member along the optical axis and intersecting the optical axis;
A driving unit that drives the lens frame in one or both of an optical axis direction and a direction intersecting the optical axis;
The leaf spring includes a corner portion fixed to the tip of the support wire, a fixing portion fixed to the front end of the movable support member, and a pair of arm portions that elastically connect the fixing portion and the corner portion. And a connecting portion for connecting the pair of arms,
The arm portion extends from both ends of the fixed portion toward one corner, and the connecting portion is arched between a pair of the arm portions, and between the corner and the connecting portion. An opening is formed,
The front end of the movable support member is provided with a stepped portion providing a gap between the arm portion and an adhesive member reservoir recessed along the connecting portion,
The lens driving device, wherein the adhesive member stored in the adhesive member reservoir is in contact with the connecting portion. 前記粘着性部材溜まりは、前記支持ワイヤーに対して前記光軸側に配置されていることを特徴とする請求項１記載のレンズ駆動装置。 The lens driving device according to claim 1, wherein the adhesive member reservoir is disposed on the optical axis side with respect to the support wire . 前記粘着性部材溜まりは、その周囲に壁が設けられていることを特徴とする請求項１又は２記載のレンズ駆動装置。 The lens driving device according to claim 1 , wherein the adhesive member reservoir is provided with a wall around it . 請求項１〜３のいずれか１項に記載されたレンズ駆動装置を備えたカメラ。 The camera provided with the lens drive device described in any one of Claims 1-3 . 請求項１〜３のいずれか１項に記載されたレンズ駆動装置を備えた電子機器。 The electronic device provided with the lens drive device described in any one of Claims 1-3 .
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