JP5188924B2

JP5188924B2 - Imaging lens unit

Info

Publication number: JP5188924B2
Application number: JP2008261898A
Authority: JP
Inventors: 智彦佐藤
Original assignee: Kantatsu Co Ltd
Current assignee: Kantatsu Co Ltd
Priority date: 2008-10-08
Filing date: 2008-10-08
Publication date: 2013-04-24
Anticipated expiration: 2028-10-08
Also published as: JP2010091808A

Description

本発明は、光学系機器における撮像レンズユニット、特に、カメラ機能を備えた携帯電話機などに組み込まれた焦点調整を自動化（オートフォーカス）した撮像レンズユニットに関する。 The present invention relates to an imaging lens unit in an optical system device, and more particularly to an imaging lens unit that automates focus adjustment incorporated in a mobile phone or the like having a camera function.

近年、携帯電話に搭載したカメラとしてレンズユニットの焦点調整を自動で行うオートフォーカス機能を備えたカメラが普及しつつある。このような、オートフォーカス機能を備えたカメラとして、例えば、特許文献１には、被写体の光学像を形成するための光学素子と、光学素子を所定の方向に案内し移動可能に支持するための支持機構と、光学素子を移動させるための第一と第二の高分子アクチュエータとを備え、この第一と第二の高分子アクチュエータに電圧の印加に応じて変形する高分子部を形成し、電圧の印加による前記高分子部の変形により光学素子を移動させることにより、レンズユニットの焦点調整を自動化した光学装置およびデジタルカメラが知られている。 In recent years, cameras equipped with an autofocus function for automatically adjusting the focus of a lens unit are becoming popular as cameras mounted on mobile phones. As a camera having such an autofocus function, for example, Patent Document 1 discloses an optical element for forming an optical image of a subject, and an optical element for guiding and moving the optical element in a predetermined direction. A support mechanism and first and second polymer actuators for moving the optical element, and forming a polymer part that deforms in response to application of voltage to the first and second polymer actuators; 2. Description of the Related Art There are known an optical device and a digital camera that automate the focus adjustment of a lens unit by moving an optical element by deformation of the polymer portion by applying a voltage.

前記デジタルカメラにおけるオートフォーカス機能は、光学レンズを移動するために二つの高分子アクチュエータを用いるとともに、高分子アクチュエータを撓ませた際、レンズ群を位置決めする構造を採用している。このため、高分子アクチュエータを撓ませた際に、レンズユニットの位置決め手段が必要であるとともに、２つの高分子アクチュエータを用いることから、部品点数も多い。このため、組付け作業に手間が掛かるとともに、例えば、携帯電話に組込む場合、小型化にも不利である。一方、携帯電話に組み込まれるカメラに用いられる撮像レンズユニットも必然的に小型・薄型化が要求される。このような携帯電話に組み込まれるオートフォーカス機能を備えた撮像レンズユニットに求められる小型・薄型化に対して本願出願人は、レンズユニットを組み込む鏡筒と、この鏡筒を光軸方向に移動自在に保持するホルダと、このホルダの支持枠と、この支持枠と前記ホルダとの間に介在する高分子アクチュエータと、端子からの電圧の印加に応じて変位する前記高分子アクチュエータに形成した複数の変位部とを備え、この高分子アクチュエータに形成した複数の変位部を鏡筒の外周面に形成した係合溝に係合させ、高分子アクチュエータで直接的にレンズユニットを駆動した撮像レンズユニットを先に特願２００７−３３８７９５号で出願している。この撮像レンズユニットは、高分子アクチュエータの変位に連動してレンズユニットを光軸方向に移動してオートフォーカスする時、鏡筒をホルダに沿わせて案内するガイド機構としてホルダにガイドリブを形成し、鏡筒の外周面にガイド溝を形成し、高分子アクチュエータの変位によってレンズユニットを光軸方向に移動する際、ガイドリブに沿って鏡筒がスライド自在に案内されている。 The autofocus function in the digital camera employs a structure that uses two polymer actuators to move the optical lens and positions the lens group when the polymer actuator is bent. For this reason, when the polymer actuator is bent, positioning means for the lens unit is required, and since two polymer actuators are used, the number of parts is large. For this reason, the assembling work takes time and, for example, when it is assembled in a mobile phone, it is disadvantageous for miniaturization. On the other hand, an imaging lens unit used in a camera incorporated in a mobile phone is inevitably required to be small and thin. In order to reduce the size and thickness required for an imaging lens unit having an autofocus function incorporated in such a cellular phone, the applicant of the present application can freely move the lens barrel in the optical axis direction. A holder held by the holder, a support frame of the holder, a polymer actuator interposed between the support frame and the holder, and a plurality of the polymer actuators that are displaced in response to application of a voltage from a terminal. An imaging lens unit that includes a displacement portion, and a plurality of displacement portions formed on the polymer actuator are engaged with engagement grooves formed on an outer peripheral surface of the lens barrel, and the lens unit is directly driven by the polymer actuator. The application has already been filed in Japanese Patent Application No. 2007-338895. This imaging lens unit forms a guide rib on the holder as a guide mechanism for guiding the lens barrel along the holder when moving the lens unit in the optical axis direction in conjunction with the displacement of the polymer actuator for autofocusing. A guide groove is formed on the outer peripheral surface of the lens barrel, and the lens barrel is slidably guided along the guide rib when the lens unit is moved in the optical axis direction by displacement of the polymer actuator.

特開２００６−３０１２０３号公報JP 2006-301203 A

ところで、前記撮像レンズユニットは、端子からの電圧の印加に応じて高分子アクチュエータに形成した複数の変位部を変位させて、この変位部に係合する鏡筒を光軸方向に上下動させて、被写体との焦点距離を自動化（オートフォーカス）するように構成しているから、上下の端子と、この端子に挟まれた高分子アクチュエータとを安定的に接触させる構造が望まれている。このような要望に対して前記撮像レンズユニットは、支持枠とホルダの間に挟着された上下の端子と高分子アクチュエータとの接触圧を高めるために、ホルダの下部に横長な開口部を形成して弾性変形可能なバネ片を形成し、このバネ片を上下の端子と、この端子に挟まれた高分子アクチュエータを介して支持枠に圧接させる構造を採用していた。このように、ホルダの下部に弾性変形可能なバネ片を一体形成することによって、部品点数を増やすことなく、端子と高分子アクチュエータとの接触圧を高めることができる反面、ホルダにバネ片を形成するために横長な開口部を形成することから、その開口部から撮像レンズユニットの内部に細かな塵や埃が侵入しやすい。特に細かな埃が光学レンズユニットに付着してしまうと、光学性能の低下を招くことから、防塵性を高めることは、この種の撮像レンズユニットにとっては重要な課題である。また、前記撮像レンズユニットは、端子に外部からの電源を供給する必要があるため、端子の端部に外部配線部材と接続する接続端子部を一体形成していたが、この接続端子部が支持枠から水平方向に突出するように形成されているため、構造的に接続端子部が外部に突出してしまい、撮像レンズユニットの小型化を損なう、という課題を有していた。 By the way, the imaging lens unit displaces a plurality of displacement portions formed in the polymer actuator in response to application of a voltage from the terminal, and moves the lens barrel engaged with the displacement portions up and down in the optical axis direction. Since the focal length with the subject is automated (autofocus), a structure that stably contacts the upper and lower terminals and the polymer actuator sandwiched between the terminals is desired. In response to such a demand, the imaging lens unit forms a horizontally long opening at the bottom of the holder in order to increase the contact pressure between the upper and lower terminals sandwiched between the support frame and the holder and the polymer actuator. Thus, an elastically deformable spring piece is formed, and a structure is adopted in which the spring piece is pressed against the support frame via upper and lower terminals and a polymer actuator sandwiched between the terminals. Thus, by integrally forming the elastically deformable spring piece at the bottom of the holder, the contact pressure between the terminal and the polymer actuator can be increased without increasing the number of parts, while the spring piece is formed on the holder. In order to do so, a horizontally long opening is formed, so that fine dust or dust easily enters the inside of the imaging lens unit from the opening. In particular, if fine dust adheres to the optical lens unit, the optical performance is deteriorated. Therefore, increasing the dust resistance is an important issue for this type of imaging lens unit. In addition, since the imaging lens unit needs to supply power from the outside to the terminal, a connection terminal portion connected to the external wiring member is integrally formed at the end portion of the terminal, but this connection terminal portion is supported. Since it is formed so as to protrude in the horizontal direction from the frame, the connection terminal portion structurally protrudes to the outside, and there is a problem that the downsizing of the imaging lens unit is impaired.

本発明は上述した問題点に鑑みてなされたものであり、撮像レンズユニットの小型化を図るとともに、端子と高分子アクチュエータとの接触圧を高めて端子と高分子アクチュエータとを安定的に接続させ、かつ、撮像レンズユニットの防塵性を高めることができる撮像レンズユニットを提供することを目的とする。 The present invention has been made in view of the above-described problems, and while reducing the size of the imaging lens unit, the contact pressure between the terminal and the polymer actuator is increased to stably connect the terminal and the polymer actuator. And it aims at providing the imaging lens unit which can improve the dustproof property of an imaging lens unit.

請求項１の撮像レンズユニットは、鏡筒内に組み込まれるレンズユニットと、前記鏡筒を光軸方向に移動自在に保持するホルダと、このホルダの支持枠と、この支持枠と前記ホルダとの間に介在する高分子アクチュエータと、端子からの電圧の印加に応じて変位する前記高分子アクチュエータに形成した複数の光軸方向に変位可能な片状部である変位部と、前記鏡筒の撮像側端面に固定して前記変位部と係合可能な受部材とを備え、前記端子からの電圧の印加に応じて前記変位部を変位させ、その変位部の変位量に応じてレンズユニットを光軸方向に移動させて被写体とのピント合わせを自動化するように構成した撮像レンズユニットであって、前記ホルダと支持枠との重ね合わせ部に近接して該ホルダ又は支持枠の少なくとも一方に光軸と直交する方向に長く開口させた長孔状の開口部を形成して弾性変形可能なバネ片を形成し、このバネ片の付勢力によって前記端子を前記高分子アクチュエータ側に押し付けるとともに、前記ホルダ又は支持枠の外周面を覆う複数の側板部を有するカバーがホルダに保持されており、前記側板部によって前記開口部を塞ぐことを特徴とする。
The imaging lens unit according to claim 1 includes a lens unit incorporated in a lens barrel, a holder that holds the lens barrel so as to be movable in an optical axis direction, a support frame of the holder, and the support frame and the holder. An intervening polymer actuator , a displacement part formed as a plurality of pieces displaceable in the direction of the optical axis formed on the polymer actuator that is displaced in response to application of a voltage from a terminal, and imaging of the lens barrel A receiving member that is fixed to a side end surface and engageable with the displacement portion, displaces the displacement portion in response to application of a voltage from the terminal, and illuminates the lens unit in accordance with a displacement amount of the displacement portion. An imaging lens unit configured to be moved in the axial direction to automate focusing with a subject, wherein an optical axis is disposed on at least one of the holder or the support frame in the vicinity of the overlapping portion of the holder and the support frame. When Forms a long hole shape of the opening is longer open in direction orthogonal to form an elastically deformable spring piece, with pressing said terminal to the polymer actuator side by the biasing force of the spring piece, the holder or A cover having a plurality of side plate portions covering the outer peripheral surface of the support frame is held by the holder, and the opening portions are closed by the side plate portions .

請求項１の構成により、支持枠に端子、高分子アクチュエータ、端子を順次、載置して支持枠とホルダとを固定することによって、上下一対の端子の間に高分子アクチュエータがサンドイッチ状態で挟着される。この時、ホルダ又は支持枠の一方に開口部を形成して薄肉状のバネ片を形成し、この突き当て片を上下の端子の一方に押圧させることによって、上下一対の端子と高分子アクチュエータとの接触圧を高めた状態でホルダと支持枠とを固定し、この後、ホルダの外面にカバーを固定することによって、カバーでホルダの開口部が塞がれる。 According to the configuration of the first aspect, the polymer actuator is sandwiched between the pair of upper and lower terminals by sequentially placing the terminal, the polymer actuator, and the terminal on the support frame and fixing the support frame and the holder. Worn. At this time, an opening is formed in one of the holder or the support frame to form a thin spring piece, and by pressing this abutting piece against one of the upper and lower terminals, a pair of upper and lower terminals and a polymer actuator The holder and the support frame are fixed in a state where the contact pressure is increased, and then the cover is fixed to the outer surface of the holder, whereby the opening of the holder is closed with the cover.

請求項２の撮像レンズユニットは、前記端子の端部より外部に露出して外部配線部材と接続する接続端子部をＬ字状に折曲形成し、この接続端子部を前記支持枠の外周面に形成する段差凹部に収納し、前記支持枠の外周面と前記接続端子部とをほぼ面一に連続させたことを特徴とする。 The imaging lens unit according to claim 2, wherein a connection terminal portion that is exposed to the outside from the end portion of the terminal and is connected to an external wiring member is bent in an L shape, and the connection terminal portion is formed on the outer peripheral surface of the support frame The outer peripheral surface of the support frame and the connection terminal portion are substantially flush with each other.

請求項２の構成により、端子の接続端子部を支持枠の段差凹部に嵌合すると、支持枠の外周面と接続端子部とが面一に連続する。この接続端子部に外部配線部材を接続し、端子から高分子アクチュエータに電圧を印加すると、高分子アクチュエータの変位部が撓み、変位部の変位量に応じてレンズユニットが光軸方向に移動して被写体とのピント合わせが自動化される。 According to the second aspect of the present invention, when the connection terminal portion of the terminal is fitted into the stepped recess of the support frame, the outer peripheral surface of the support frame and the connection terminal portion are flush with each other. When an external wiring member is connected to the connection terminal portion and a voltage is applied from the terminal to the polymer actuator, the displacement portion of the polymer actuator bends and the lens unit moves in the optical axis direction according to the displacement amount of the displacement portion. Focusing on the subject is automated.

請求項３記載の撮像レンズユニットは、ホルダに係止爪を設け、この係止爪を前記カバーに形成する係止孔に係止して前記ホルダに前記カバーを保持したことを特徴とする。 The imaging lens unit according to claim 3 is characterized in that the holder is provided with a locking claw, and the locking claw is locked in a locking hole formed in the cover to hold the cover on the holder.

ホルダにカバーを被せると、カバーに形成する係止孔がホルダの係止爪が係止してホルダにカバーが固定される。 When the cover is put on the holder, the locking holes formed in the cover are locked by the locking claws of the holder, and the cover is fixed to the holder.

請求項１の撮像レンズユニットによれば、鏡筒内に組み込まれるレンズユニットと、前記鏡筒を光軸方向に移動自在に保持するホルダと、このホルダの支持枠と、この支持枠と前記ホルダとの間に介在する高分子アクチュエータと、端子からの電圧の印加に応じて変位する前記高分子アクチュエータに形成した複数の光軸方向に変位可能な片状部である変位部と、前記鏡筒の撮像側端面に固定して前記変位部と係合可能な受部材とを備え、前記端子からの電圧の印加に応じて前記変位部を変位させ、その変位部の変位量に応じてレンズユニットを光軸方向に移動させて被写体とのピント合わせを自動化するように構成した撮像レンズユニットであって、前記ホルダと支持枠との重ね合わせ部に近接して該ホルダ又は支持枠の少なくとも一方に光軸と直交する方向に長く開口させた長孔状の開口部を形成して弾性変形可能なバネ片を形成し、このバネ片の付勢力によって前記端子を前記高分子アクチュエータ側に押し付けるとともに、前記ホルダ又は支持枠の外周面を覆う複数の側板部を有するカバーがホルダに保持されており、前記側板部によって前記開口部を塞ぐものであるから、ホルダ又は支持枠の一方に開口部を形成することによって薄肉状のバネ片が形成され、このバネ片を端子に押圧させることによって、上下一対の端子と高分子アクチュエータとの接触圧を高めて端子と高分子アクチュエータとを確実に接続させることができるとともに、バネ片を形成するための開口部がカバーによって塞がれ、開口部からの塵や埃の侵入を防止することができ、撮像レンズユニットの防塵性を高めることができる。
According to the imaging lens unit of claim 1, the lens unit incorporated in the lens barrel, the holder for holding the lens barrel movably in the optical axis direction, the support frame of the holder, the support frame and the holder A polymer actuator interposed therebetween , a displacement portion formed as a plurality of pieces displaceable in the direction of the optical axis formed on the polymer actuator that is displaced in response to application of a voltage from a terminal, and the lens barrel A receiving member that can be fixed to the image-side end surface and engageable with the displacement portion, and the displacement portion is displaced in response to application of a voltage from the terminal, and the lens unit is in accordance with a displacement amount of the displacement portion. the focusing of the object is moved in the optical axis direction an imaging lens unit which is configured to automate, at least one of the holder or the supporting frame in proximity to the overlapping portion between the holder and the support frame Forms a long hole shape of the opening is longer open in a direction perpendicular to the axis to form an elastically deformable spring piece, with pressing said terminal to the polymer actuator side by the biasing force of the spring piece, the A cover having a plurality of side plate portions covering the outer peripheral surface of the holder or the support frame is held by the holder, and the opening is closed by the side plate portion, so that an opening is formed in one of the holder or the support frame. Thus, a thin spring piece is formed, and by pressing the spring piece against the terminal, the contact pressure between the pair of upper and lower terminals and the polymer actuator can be increased to securely connect the terminal and the polymer actuator. In addition, the opening for forming the spring piece is blocked by the cover, and dust and dust can be prevented from entering from the opening. It is possible to improve the dust resistance.

請求項２の撮像レンズユニットによれば、前記端子の端部より外部に露出して外部配線部材と接続する接続端子部をＬ字状に折曲形成し、この接続端子部を前記支持枠の外周面に形成する段差凹部に収納し、前記支持枠の外周面と前記接続端子部とをほぼ面一に連続させたものであるから、端子の接続端子部が水平方向に突出することなく、段差凹部に収まり、支持枠の外周面と前記端子の接続端子部とがほぼ面一に連続することから、撮像レンズユニットをよりコンパクトに小型化することができる。 According to the imaging lens unit of claim 2, the connection terminal portion that is exposed to the outside from the end portion of the terminal and is connected to the external wiring member is bent in an L shape, and the connection terminal portion is formed on the support frame. Since it is housed in a stepped recess formed on the outer peripheral surface and the outer peripheral surface of the support frame and the connection terminal portion are substantially flush with each other, the connection terminal portion of the terminal does not protrude in the horizontal direction, Since the outer peripheral surface of the support frame and the connecting terminal portion of the terminal are substantially flush with each other in the stepped recess, the imaging lens unit can be made more compact and compact.

請求項３記載の撮像レンズユニットによれば、ホルダに係止爪を設け、この係止爪を前記カバーに形成する係止孔に係止して前記ホルダに前記カバーを保持したものであるから、ホルダにカバーを被せてホルダの係止爪にカバーに形成する係止孔に係止するだけでカバーをワンタッチで固定することができる。 According to the imaging lens unit of claim 3, the holder is provided with a locking claw, and the locking claw is locked in a locking hole formed in the cover, and the cover is held by the holder. The cover can be fixed with a single touch by simply covering the holder with the cover and engaging the engaging claw of the holder with the engaging hole formed in the cover.

本発明の実施の形態を実施例に基づき図面を参照して説明する。 Embodiments of the present invention will be described based on examples with reference to the drawings.

図１は本発明の一実施例を示す撮像レンズユニットの斜視図、図２は撮像レンズユニットの分解斜視図、図３は一部を切り欠いた撮像レンズユニットの斜視図、図４は撮像レンズユニットの断面図、図５は撮像レンズユニットの組み付け手順を示す分解斜視図、図６はカバーの斜視図、図７はホルダの斜視図である。 1 is a perspective view of an imaging lens unit showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of the imaging lens unit, FIG. 3 is a perspective view of the imaging lens unit with a part cut away, and FIG. 4 is an imaging lens. FIG. 5 is an exploded perspective view showing the assembly procedure of the imaging lens unit, FIG. 6 is a perspective view of the cover, and FIG. 7 is a perspective view of the holder.

本発明の実施例における撮像レンズユニットは、ＣＣＤ等の撮像素子が組込まれたホルダ１と、複数のレンズ７で構成されるレンズユニット１５と、このレンズユニット１５を保持する鏡筒１０と、前記ホルダ１を支持する支持枠３０と、この支持枠３０と前記ホルダ１との間に介在する高分子アクチュエータ４０、この高分子アクチュエータ４０と係合する受部材４５などを主要構成部品として、前記高分子アクチュエータ４０を電圧の印加に応じて変位させ前記レンズユニット１５を光軸方向に移動させることによって焦点合わせを自動で行うオートフォーカス（ＡＦ）機能を備えている。なお、前記高分子アクチュエータ４０を除くホルダ１、レンズ７、鏡筒１０、支持枠３０、受部材４５は樹脂による成形品である。 The imaging lens unit according to the embodiment of the present invention includes a holder 1 in which an imaging device such as a CCD is incorporated, a lens unit 15 including a plurality of lenses 7, a lens barrel 10 that holds the lens unit 15, The main frame includes a support frame 30 that supports the holder 1, a polymer actuator 40 interposed between the support frame 30 and the holder 1, and a receiving member 45 that engages with the polymer actuator 40. An autofocus (AF) function for automatically performing focusing is provided by moving the lens unit 15 in the optical axis direction by displacing the molecular actuator 40 in response to application of a voltage. The holder 1, the lens 7, the lens barrel 10, the support frame 30, and the receiving member 45 excluding the polymer actuator 40 are molded products made of resin.

前記ホルダ１の下部には矩形状の基台部２が形成され、この基台部２を、当該基台部２と同形状（矩形状の）支持枠３０上に載置する。また、基台部２の上部は、四隅を切り欠いて段差部３を形成することによって八角形状の角筒部４が形成され、前記段差部３には、支持枠３０を固定するための孔部５が形成されている。また、レンズユニット１５を組み込む鏡筒１０はバレル１０ａとバレルホルダ２０とで構成され、前記バレル１０ａの外周面に雄ネジ部２２を形成し、この雄ネジ部２２を前記バレルホルダ２０の内周面に形成した雌ネジ２３に螺着することによって、バレルホルダ２０にバレル１０ａを組み込む。この時、バレル１０ａのネジ込み量によって、バレル１０ａと、このバレル１０ａに一体的に組み込まれるレンズ７とが光軸方向に位置調整可能となる。また、バレル１０ａの上面開口部周縁に位置してテーパ状の凹面１２が形成され、雄ネジ部２２と雌ネジ部２３との螺合によってバレルホルダ２０に対するバレル１０ａの光軸方向の位置を調整した後、凹面１２に接着剤を充填してバレルホルダ２０とバレル１０ａとを一体化している。また、前記角筒部４の内面には複数、本実施例では３本のガイドリブ６が形成され、一方、前記バレルホルダ２０に形成する矩形状の枠部８ａにはガイドリブ６と係合するガイド溝８が形成され、このガイド溝８にホルダ１に形成するガイドリブ６を挿入することによってホルダ１に対してバレルホルダ２０を光軸方向に案内する。これにより、バレル１０ａに組み付けたレンズユニット１５が前記ガイドリブ６に沿って光軸方向にスライドし、かつ、ガイドリブ６とガイド溝８との係合によってホルダ１にバレルホルダ２０が回り止め状態で保持される。また、ホルダ１は後述するカバー５０で覆われ、支持枠３０に形成するフランジ部３０ａとカバー５０との間にガイドリブ６に沿って案内されるバレルホルダ２０が配置され、そのカバー５０とバレルホルダ２０とでバレルホルダ２０の上下動を規制するように構成している。 A rectangular base 2 is formed in the lower part of the holder 1, and the base 2 is placed on a support frame 30 having the same shape (rectangular shape) as the base 2. Further, the upper part of the base part 2 is formed with an octagonal rectangular tube part 4 by notching the four corners to form the step part 3, and the step part 3 has a hole for fixing the support frame 30. Part 5 is formed. The lens barrel 10 incorporating the lens unit 15 includes a barrel 10 a and a barrel holder 20. A male screw portion 22 is formed on the outer peripheral surface of the barrel 10 a, and the male screw portion 22 is formed on the inner peripheral surface of the barrel holder 20. The barrel 10a is assembled into the barrel holder 20 by being screwed onto the formed female screw 23. At this time, the position of the barrel 10a and the lens 7 integrally incorporated in the barrel 10a can be adjusted in the optical axis direction by the screwing amount of the barrel 10a. Further, a tapered concave surface 12 is formed at the peripheral edge of the upper surface opening of the barrel 10a, and the position of the barrel 10a in the optical axis direction with respect to the barrel holder 20 is adjusted by screwing the male screw portion 22 and the female screw portion 23. Thereafter, the concave surface 12 is filled with an adhesive to integrate the barrel holder 20 and the barrel 10a. A plurality of guide ribs 6 are formed on the inner surface of the rectangular tube portion 4 in this embodiment, while a guide groove 6 that engages with the guide rib 6 is formed in the rectangular frame portion 8 a formed on the barrel holder 20. 8 is formed, and the guide holder 6 formed in the holder 1 is inserted into the guide groove 8 to guide the barrel holder 20 relative to the holder 1 in the optical axis direction. As a result, the lens unit 15 assembled to the barrel 10a slides along the guide rib 6 in the optical axis direction, and the barrel holder 20 is held in the holder 1 in a non-rotating state by the engagement between the guide rib 6 and the guide groove 8. The Further, the holder 1 is covered with a cover 50 which will be described later, and a barrel holder 20 guided along the guide rib 6 is disposed between the flange portion 30a formed on the support frame 30 and the cover 50, and the cover 50, the barrel holder 20, Thus, the vertical movement of the barrel holder 20 is restricted.

前記支持枠３０は、ホルダ１の基台部２と同一の矩形状に形成され、前記支持枠３０の上面の載置部３１に端子３３、高分子アクチュエータ４０、端子３２を介して前記ホルダ１の基台部２を載置する。また、載置部３１の四隅にはボス部３５が突設され、前記上下一対の端子３２、３３と高分子アクチュエータ４０にはボス部３５の基端部の段部３５ａと嵌合する切欠部３４が形成されている。また、支持枠３０の内周面には前記ホルダ１のカバー５０と対向するフランジ部３０ａが形成され、前記ホルダ１のカバー５０と支持枠３０のフランジ部３０ａとの間に前記バレルホルダ２０が配置され、カバー５０とフランジ部３０ａとでバレルホルダ２０の光軸方向の移動範囲を制限している。そして、図１に示すように、載置部３１のボス部３５の段部３５ａに端子３３、高分子アクチュエータ４０、端子３２の切欠部３４を嵌合させて載置部３１上に順次、載置した状態で前記ホルダ１の孔部５にボス部３５を圧入することによって、支持枠３０とホルダ１とを一体的に固定する。 The support frame 30 is formed in the same rectangular shape as the base portion 2 of the holder 1, and the holder 1 is placed on the placement portion 31 on the upper surface of the support frame 30 via a terminal 33, a polymer actuator 40, and a terminal 32. The base part 2 is placed. In addition, bosses 35 project from the four corners of the mounting portion 31, and the pair of upper and lower terminals 32, 33 and the polymer actuator 40 are notched to fit with the step 35 a at the base end of the boss 35. 34 is formed. Further, a flange portion 30 a facing the cover 50 of the holder 1 is formed on the inner peripheral surface of the support frame 30, and the barrel holder 20 is disposed between the cover 50 of the holder 1 and the flange portion 30 a of the support frame 30. The movement range of the barrel holder 20 in the optical axis direction is limited by the cover 50 and the flange portion 30a. Then, as shown in FIG. 1, the terminal 33, the polymer actuator 40, and the notch 34 of the terminal 32 are fitted to the step portion 35 a of the boss portion 35 of the placement portion 31, and the placement portion 31 is sequentially loaded. The support frame 30 and the holder 1 are integrally fixed by press-fitting the boss portion 35 into the hole portion 5 of the holder 1 in the placed state.

このように、支持枠３０とホルダ１とをボス部３５と孔部５との圧入嵌合によって一体化することによって、上下一対の端子３２、３３の間に高分子アクチュエータ４０がサンドイッチ状態で挟着される。さらに、上下一対の端子３２、３３の間に高分子アクチュエータ４０をより強固に挟着するために、前記ホルダ１の基台部２の下端縁寄りに横長な開口部３６を形成することによって、前記基台部２の下端縁に薄肉状のバネ片３７を形成するとともに、そのバネ片３７の中央部に下方に向かって湾曲状に突出する突き当て片３８を形成し、この突き当て片３８を上側の端子３３に押圧させる。また、前記端子３２、３３の縁部にはそれぞれ下方に向かってＬ字状に折曲した接続端子部３２ａ、３３ａが一体形成され、この接続端子部３２ａ、３３ａに図示しない外部配線部材を接続することによって、前記端子３２、３３に電源を供給している。さらに、前記支持枠３０の外周面には、前記各端子３２、３３に形成する接続端子部３２ａ、３３ａと対応して段差凹部３９が形成されており、この段差凹部３９に接続端子部３２ａ、３３ａを嵌合させることによって、支持枠３０の外周面と接続端子部３２ａ、３３ａとが面一に連続する。 Thus, the polymer frame 40 is sandwiched between the pair of upper and lower terminals 32 and 33 by integrating the support frame 30 and the holder 1 by press-fitting the boss 35 and the hole 5. Worn. Further, in order to more firmly sandwich the polymer actuator 40 between the pair of upper and lower terminals 32, 33, by forming a horizontally elongated opening 36 near the lower end edge of the base portion 2 of the holder 1, A thin spring piece 37 is formed at the lower end edge of the base portion 2, and an abutting piece 38 that protrudes downward in a curved shape is formed at the center of the spring piece 37. Is pushed to the upper terminal 33. In addition, connection terminal portions 32a and 33a bent in an L shape downward are integrally formed at the edges of the terminals 32 and 33, and an external wiring member (not shown) is connected to the connection terminal portions 32a and 33a. By doing so, power is supplied to the terminals 32 and 33. Further, a step recess 39 is formed on the outer peripheral surface of the support frame 30 corresponding to the connection terminal portions 32a and 33a formed on the terminals 32 and 33. The connection terminal portions 32a and 33a are formed in the step recess 39, respectively. By fitting 33a, the outer peripheral surface of the support frame 30 and the connection terminal portions 32a and 33a are flush with each other.

カバー５０は前記ホルダ１を覆う薄板状であり、このカバー５０は外部に露出する前記ホルダ１のほぼ全域を覆うように、前記ホルダ１の角筒部４の前面を覆う八角形状の天板部５１と、この天板部５１の周縁からホルダ１の基台部２の外周面を覆うように垂設した４枚の側板部５２とで構成されている。前記側板部５２には左右一対の係止孔５３が形成されるとともに、前記ホルダ１の基台部２には、係止孔５３と係合する係止爪５４が形成され、ホルダ１にカバー５０を被せ、ホルダ１の係止爪５４にホルダ１の係止孔５３を係止して、ホルダ１にカバー５０に固定することによって、側板部５２でホルダ１の基台部２の下端縁寄りに形成された開口部３６が塞がれる。 The cover 50 has a thin plate shape that covers the holder 1, and the cover 50 has an octagonal top plate portion that covers the front surface of the rectangular tube portion 4 of the holder 1 so as to cover almost the entire area of the holder 1 exposed to the outside. 51 and four side plate portions 52 that are suspended from the periphery of the top plate portion 51 so as to cover the outer peripheral surface of the base portion 2 of the holder 1. The side plate portion 52 is formed with a pair of left and right locking holes 53, and the base portion 2 of the holder 1 is formed with locking claws 54 that engage with the locking holes 53. 50, the locking hole 53 of the holder 1 is locked to the locking claw 54 of the holder 1, and the holder 1 is fixed to the cover 50, so that the side plate portion 52 has the lower end edge of the base portion 2 of the holder 1 The opening 36 formed on the side is closed.

前記高分子アクチュエータ４０は、上下一対の端子３２、３３からの電圧の印加に応じて変位する複数の変位部４１を備える。この変位部４１は、変位部４１間の分割溝ａによって、上下方向（光軸方向）に変位可能であり、形状としてはほぼ半楕円の舌片状である。また、図４に示すように、前記バレルホルダ２０の後面に凹溝２４が形成され、この凹溝２４に前記レンズユニット１５の後方遮光として機能する前記受部材４５が接着剤２５によって一体的に固定され、この受部材４５の外周面に形成する係合溝４６に前記高分子アクチュエータ４０の各変位部４１を係合させ、変位部４１の変位に連動して、バレルホルダ２０を光軸方向に移動する。すなわち、バレルホルダ２０を光軸方向に移動することによって、バレルホルダ２０に螺着したバレル１０ａに組み込んだレンズユニット１５の焦点合わせが成される。なお、変位部４１の先端部を挿入係合する係合溝４６は、上下面がテーパ面４７となっている。さらに、受部材４５の下端周縁部は、変位部４１を係合溝４６に誘い込むようテーパ状の案内部４８が形成されている。なお、図中５５は赤外線をカットするＩＲカットガラスである。 The polymer actuator 40 includes a plurality of displacement portions 41 that are displaced in response to application of voltage from a pair of upper and lower terminals 32 and 33. The displacement portion 41 can be displaced in the vertical direction (optical axis direction) by the dividing groove a between the displacement portions 41 and has a substantially semi-elliptical tongue shape. Further, as shown in FIG. 4, a concave groove 24 is formed on the rear surface of the barrel holder 20, and the receiving member 45 functioning as a rear light shield for the lens unit 15 is integrally fixed to the concave groove 24 by an adhesive 25. Then, each displacement portion 41 of the polymer actuator 40 is engaged with an engagement groove 46 formed on the outer peripheral surface of the receiving member 45, and the barrel holder 20 is moved in the optical axis direction in conjunction with the displacement of the displacement portion 41. To do. That is, by moving the barrel holder 20 in the optical axis direction, the lens unit 15 incorporated in the barrel 10a screwed to the barrel holder 20 is focused. Note that the upper and lower surfaces of the engaging groove 46 for inserting and engaging the distal end portion of the displacement portion 41 are tapered surfaces 47. Furthermore, a tapered guide portion 48 is formed at the lower peripheral edge of the receiving member 45 so as to guide the displacement portion 41 into the engagement groove 46. In the figure, reference numeral 55 denotes IR cut glass for cutting infrared rays.

以上のように構成される本実施例における組立手順について主に図５を参照して説明する。まず、支持枠３０の載置部３１に形成するボス部３５に端子３３、高分子アクチュエータ４０、端子３２の切欠部３４を通して位置決め保持する。この時、端子３２，３３に形成する接続端子部３２ａ、３３ａは、支持枠３０に形成する段差凹部３９に嵌合し、支持枠３０の外周面と接続端子部３２ａ、３３ａとが面一に連続する。また、ホルダ１に形成するガイドリブ６にバレルホルダ２０に形成するガイド溝８を嵌め入れて、予めホルダ１にバレルホルダ２０を組み付けた状態で支持枠３０の載置部３１に形成するボス部３５にホルダ１の孔部５にボス部３５を圧入し、支持枠３０とホルダ１とを一体化する。また、ホルダ１の孔部５にボス部３５を通してホルダ１を支持枠３０に組み付ける際、高分子アクチュエータ４０の変位部４１がバレルホルダ２０の下端部に形成する案内部４８に当接し、ホルダ１への支持枠３０の押し込み動作に追従して変位部４１は案内部４８に沿って係合溝４６に誘い込まれ、孔部５とボス部３５との圧入嵌合によって、支持枠３０とホルダ１とが完全に一体化した状態では、高分子アクチュエータ４０の変位部４１はバレルホルダ２０の係合溝４６に挿入係合する。これとともに、ホルダ１と支持枠３０との間に介在する高分子アクチュエータ４０が上下の端子３２、３３の間に挟まれて挟着保持されるとともに、ホルダ１の基台部２の下端縁に形成するバネ片３７の突き当て片３８が上側の端子３３に圧接してバネ片３７のバネ圧が上側の端子３３に作用し、そのバネ片３７のバネ付勢によって上下の端子３２、３３の間に高分子アクチュエータ４０が強固に挟着される。このように、支持枠３０にホルダ１とバレルホルダ２０とを組み付けた後、バレルホルダ２０の内周面に形成する雌ネジ部２３にレンズユニット１５を組み込んだバレル１０ａの外周に形成する雄ネジ部２２を螺着した後、ホルダ１にカバー５０を被せ、ホルダ１の係止爪５４にホルダ１の係止孔５３を係止して、ホルダ１にカバー５０に固定することによって、カバー５０の側板部５２によってホルダ１の基台部２の下端縁寄りに形成された開口部３６を塞ぐことによって撮像レンズユニットの組み付け作業が完了する。 The assembly procedure in the present embodiment configured as described above will be described mainly with reference to FIG. First, the boss part 35 formed on the mounting part 31 of the support frame 30 is positioned and held through the terminal 33, the polymer actuator 40, and the notch part 34 of the terminal 32. At this time, the connection terminal portions 32a and 33a formed on the terminals 32 and 33 are fitted into the stepped recesses 39 formed on the support frame 30, and the outer peripheral surface of the support frame 30 and the connection terminal portions 32a and 33a are flush with each other. It is continuous. Further, the guide groove 8 formed on the barrel holder 20 is fitted into the guide rib 6 formed on the holder 1, and the holder is attached to the boss portion 35 formed on the mounting portion 31 of the support frame 30 in a state where the barrel holder 20 is assembled to the holder 1 in advance. The boss portion 35 is press-fitted into the one hole portion 5, and the support frame 30 and the holder 1 are integrated. Further, when the holder 1 is assembled to the support frame 30 through the boss portion 35 in the hole portion 5 of the holder 1, the displacement portion 41 of the polymer actuator 40 comes into contact with the guide portion 48 formed at the lower end portion of the barrel holder 20, and moves to the holder 1. Following the pushing-in operation of the support frame 30, the displacement portion 41 is guided into the engagement groove 46 along the guide portion 48, and the support frame 30 and the holder 1 are pressed by press-fitting between the hole portion 5 and the boss portion 35. Are completely integrated, the displacement portion 41 of the polymer actuator 40 is inserted into and engaged with the engagement groove 46 of the barrel holder 20. At the same time, the polymer actuator 40 interposed between the holder 1 and the support frame 30 is sandwiched and held between the upper and lower terminals 32 and 33, and at the lower end edge of the base portion 2 of the holder 1. The abutting piece 38 of the spring piece 37 to be formed is in pressure contact with the upper terminal 33 and the spring pressure of the spring piece 37 acts on the upper terminal 33, and the spring bias of the spring piece 37 causes the upper and lower terminals 32, 33 to move. The polymer actuator 40 is firmly sandwiched therebetween. Thus, after assembling the holder 1 and the barrel holder 20 to the support frame 30, the male screw portion 22 formed on the outer periphery of the barrel 10a in which the lens unit 15 is incorporated in the female screw portion 23 formed on the inner peripheral surface of the barrel holder 20. Then, the cover 50 is put on the holder 1, the locking hole 53 of the holder 1 is locked to the locking claw 54 of the holder 1, and the side plate of the cover 50 is fixed to the cover 50. The assembly operation of the imaging lens unit is completed by closing the opening 36 formed near the lower end edge of the base portion 2 of the holder 1 by the portion 52.

以上のように構成される撮像レンズユニットは、端子３２、３３から高分子アクチュエータ４０に電圧が印加されると、高分子アクチュエータ４０の変位部４１が撓むことによって、変位部４１と係合溝４６との係合によってバレルホルダ２０がガイドピン６に沿って上下に移動する。これにより、バレルホルダ２０に螺着したバレル１０ａに組み込んだレンズユニット１５が光軸方向に移動して被写体とのピント合わせが自動化（オートフォーカス）される。すなわち、高分子アクチュエータ４０は電圧印加に応じて変位し、自由端の変位部４１が撓んで鏡筒１０を介してレンズユニット１５が光軸方向に移動し、被写体との焦点距離を自動的に合わせる。高分子アクチュエータ４０への電圧印加が解除されると、高分子アクチュエータ４０が初期状態に戻る。このように、本実施例においては、端子３２、３３からの電圧印加に応じて高分子アクチュエータ４０の変位部４１を変位させて焦点距離を合わせることから、変位部４１の変位量によってレンズユニット１５の焦点距離が決定する。また、変位部４１によって駆動されるバレルホルダ２０と、レンズユニット１５を組み込んだバレル１０ａとが雄ネジ部２２と雌ネジ部２３との螺合によって組み付けられているため、バレルホルダ２０へのバレル１０ａのネジ込み量を調整することによって、バレルホルダ２０に対してバレル１０ａの光軸方向に位置を調整することが可能である。このため、バレルホルダ２０にバレル１０ａをネジ込んだ状態で仮り止めし、高分子アクチュエータ４０に電圧印加して高分子アクチュエータ４０の変位部４１を撓ませた際、バレル１０ａの位置を調整した後、バレルホルダ２０と鏡筒１０との間に形成した凹面１２に接着剤などを充填して一体化することで、高分子アクチュエータ４０の個体差などに起因して高分子アクチュエータ４０の変位部４１の変位量にバラツキが生じたとしても、バレル１０ａの位置が調整可能である。これにより、ピントが合った正確な位置にレンズユニット１５を配置することができる。また、ホルダ１の基台部２の下端縁に形成するバネ片３７の突き当て片３８を上側の端子３３に圧接することによってバネ片３７のバネ圧が上側の端子３３に作用し、そのバネ片３７のバネ付勢によって上下の端子３２、３３の間に高分子アクチュエータ４０が強固に挟着されるため、上下に端子３２、３３と高分子アクチュエータ４０とを確実に接触させて、安定的に電気接続させることができるとともに、上側の端子３３に圧接するためのバネ片３７を形成するために、ホルダ１の基台部２の下端縁寄りに形成された開口部３６がホルダ１に被せたカバー５０の側板部５２で塞がれるため、開口部３６から塵や埃が撮像レンズユニットの内部に侵入することなく、撮像レンズユニットの防塵性を高めることができる。また、カバー５０の固定は、ホルダ１にカバー５０を被せ、ホルダ１に形成する係止爪５４にホルダ１の係止孔５３を係止するだけで簡単かつ迅速に固定することができ、組付作業性にも優れる。さらに、端子３２、３３の接続端子部３２ａ、３３ａは、支持枠３０に形成する段差凹部３９に嵌合し、支持枠３０の外周面と接続端子部３２ａ、３３ａとが面一に連続することから、接続端子部３２ａ、３３ａが支持枠３０から突出することなく、支持枠３０の外形寸法内に接続端子部３２ａ、３３ａを収めることができ、撮像レンズユニットの小型化が可能となる。また、高分子アクチュエータ４０の変位量によってレンズユニット１５を光軸に沿って移動させて焦点調節するものであるから、例えばステッピングモーターなどによって焦点調節する構造に比べ構造の簡略化、駆動伝達機構の小型化が可能となり、携帯電話などのカメラとして組み込む場合、カメラ機構の小型化並びに薄型化が可能である。 In the imaging lens unit configured as described above, when a voltage is applied to the polymer actuator 40 from the terminals 32 and 33, the displacement part 41 of the polymer actuator 40 bends, whereby the displacement part 41 and the engagement groove Due to the engagement with 46, the barrel holder 20 moves up and down along the guide pins 6. As a result, the lens unit 15 incorporated in the barrel 10a screwed to the barrel holder 20 moves in the optical axis direction, and focusing with the subject is automated (autofocus). That is, the polymer actuator 40 is displaced in response to voltage application, the free end displacement portion 41 is bent, and the lens unit 15 is moved in the optical axis direction via the lens barrel 10 to automatically adjust the focal length with the subject. Match. When the voltage application to the polymer actuator 40 is released, the polymer actuator 40 returns to the initial state. As described above, in the present embodiment, the focal length is adjusted by displacing the displacement portion 41 of the polymer actuator 40 in accordance with the voltage application from the terminals 32 and 33, so that the lens unit 15 depends on the displacement amount of the displacement portion 41. The focal length is determined. Further, since the barrel holder 20 driven by the displacement portion 41 and the barrel 10a incorporating the lens unit 15 are assembled by screwing the male screw portion 22 and the female screw portion 23, the barrel 10a to the barrel holder 20 is assembled. By adjusting the screwing amount, the position of the barrel 10a in the optical axis direction of the barrel 10a can be adjusted. For this reason, after the barrel 10a is screwed into the barrel holder 20, the position of the barrel 10a is adjusted when the displacement portion 41 of the polymer actuator 40 is bent by applying a voltage to the polymer actuator 40. Displacement of the displacement portion 41 of the polymer actuator 40 due to individual differences of the polymer actuator 40 by filling the concave surface 12 formed between the barrel holder 20 and the lens barrel 10 with an adhesive or the like. Even if the amount varies, the position of the barrel 10a can be adjusted. Thereby, the lens unit 15 can be arrange | positioned in the exact position which focused. Further, when the abutting piece 38 of the spring piece 37 formed on the lower end edge of the base portion 2 of the holder 1 is pressed against the upper terminal 33, the spring pressure of the spring piece 37 acts on the upper terminal 33, and the spring Since the polymer actuator 40 is firmly sandwiched between the upper and lower terminals 32 and 33 due to the spring bias of the piece 37, the terminals 32 and 33 and the polymer actuator 40 are reliably brought into contact with each other in the upper and lower directions and are stable. An opening 36 formed near the lower edge of the base portion 2 of the holder 1 covers the holder 1 in order to form a spring piece 37 that can be electrically connected to the upper terminal 33. Since the cover 50 is closed by the side plate portion 52, dust and dirt of the imaging lens unit can be improved without dust or dust entering the inside of the imaging lens unit from the opening 36. The cover 50 can be fixed simply and quickly by simply covering the holder 1 with the cover 50 and locking the locking hole 53 of the holder 1 to the locking claw 54 formed on the holder 1. Excellent workability. Furthermore, the connection terminal portions 32a and 33a of the terminals 32 and 33 are fitted into a stepped recess 39 formed in the support frame 30, so that the outer peripheral surface of the support frame 30 and the connection terminal portions 32a and 33a are flush with each other. Therefore, the connection terminal portions 32a and 33a can be accommodated within the outer dimensions of the support frame 30 without the connection terminal portions 32a and 33a projecting from the support frame 30, and the imaging lens unit can be downsized. Further, since the lens unit 15 is moved along the optical axis according to the amount of displacement of the polymer actuator 40 to adjust the focus, for example, the structure is simplified compared to a structure in which the focus is adjusted by a stepping motor or the like, and the drive transmission mechanism is improved. When the camera can be miniaturized and incorporated as a camera such as a mobile phone, the camera mechanism can be reduced in size and thickness.

以上のように、本実施例においては、ホルダ１の基台部２の下端縁寄りに形成された開口部３６を形成して上側の端子３３に圧接させるバネ片３７を形成し、このバネ片３７によって、上下に端子３２、３３と高分子アクチュエータ４０とを確実に接触させて、端子３２、３３と高分子アクチュエータ４０とを安定的に電気接続させることができるとともに、前記開口部３６がホルダ１に被せたカバー５０の側板部５２で塞がれるため、撮像レンズユニット内への塵や埃の侵入を確実に防止して撮像レンズユニットの防塵性を高めることができる。また、端子３２、３３の接続端子部３２ａ、３３ａを支持枠３０に形成する段差凹部３９に嵌合させて、支持枠３０の外周面と接続端子部３２ａ、３３ａとを面一に連続させることによって、接続端子部３２ａ、３３ａが支持枠３０から突出することなく、支持枠３０の外形寸法内に接続端子部３２ａ、３３ａを収めることができ、撮像レンズユニットの外形寸法を抑えることができ、撮像レンズユニットの小型化が可能となる。さらに、ホルダ１へのカバー５０の取り付けは、ホルダ１にカバー５０を被せ、ホルダ１の係止爪５４にカバー５０に形成する係止孔５３に係止するだけでカバー５０をワンタッチで固定することができるから、組み付け作業性にも優れる。 As described above, in this embodiment, the opening 36 formed near the lower end edge of the base portion 2 of the holder 1 is formed to form the spring piece 37 that presses against the upper terminal 33, and this spring piece 37, the terminals 32 and 33 and the polymer actuator 40 can be reliably brought into contact with each other up and down, and the terminals 32 and 33 and the polymer actuator 40 can be stably electrically connected. 1 is covered with the side plate portion 52 of the cover 50 that covers the cover 1, it is possible to reliably prevent dust and dust from entering the imaging lens unit and improve the dust-proof property of the imaging lens unit. Further, the connection terminal portions 32a and 33a of the terminals 32 and 33 are fitted into the stepped recesses 39 formed in the support frame 30, and the outer peripheral surface of the support frame 30 and the connection terminal portions 32a and 33a are made to be flush with each other. Thus, the connection terminal portions 32a and 33a can be accommodated within the external dimensions of the support frame 30 without protruding from the support frame 30, and the external dimensions of the imaging lens unit can be suppressed. The imaging lens unit can be downsized. Further, the cover 50 is attached to the holder 1 by simply covering the holder 1 with the cover 50 and locking the cover 50 with the locking hole 53 formed in the cover 50 on the locking claw 54 of the holder 1 with one touch. Therefore, it is excellent in assembly workability.

以上、本発明の実施例について詳述したが、本発明は前記実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。また、ホルダ１や支持枠３０の形状や変位部４１の形状、個数などは適宜選定すればよい。さらに、ホルダ１や支持枠３０の固定手段などレンズユニットとしての基本的構成は適宜選定すればよい。また、前記実施例ではレンズ７を樹脂で成形した所謂、プラスチックで成形した例を示したがガラス製のレンズで成形してもよい。また、ホルダ１に開口部３６を形成してホルダ１にバネ片３７を形成した例を示したが、支持枠３０側に開口部３６を形成してもよく、さらに、開口部３６に形状なども前記実施例に限るものではなく、適宜選定すればよい。 As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. Moreover, what is necessary is just to select suitably the shape of the holder 1 or the support frame 30, the shape of the displacement part 41, a number, etc. FIG. Furthermore, the basic configuration of the lens unit such as the fixing means for the holder 1 and the support frame 30 may be selected as appropriate. Further, in the above-described embodiment, an example in which the lens 7 is formed of a resin, that is, a so-called plastic is shown. Moreover, although the example which formed the opening part 36 in the holder 1 and formed the spring piece 37 in the holder 1 was shown, the opening part 36 may be formed in the support frame 30 side, and also shape, etc. in the opening part 36 are shown. However, the present invention is not limited to the above embodiment, and may be selected as appropriate.

本発明の一実施例を示す撮像レンズユニットの斜視図である。It is a perspective view of an imaging lens unit showing an example of the present invention. 同上、図２は撮像レンズユニットの分解斜視図である。FIG. 2 is an exploded perspective view of the imaging lens unit. 同上、一部を切り欠いた撮像レンズユニットの斜視図である。It is a perspective view of the imaging lens unit which a part cut out same as the above. 同上、撮像レンズユニットの断面図である。It is sectional drawing of an imaging lens unit same as the above. 同上、撮像レンズユニットの組み付け手順を示す分解斜視図であり、図５（ａ）は組み付け前のホルダ、図５（ｂ）は端子を組み付けた状態、図５（ｃ）は端子と高分子アクチュエータと鏡筒のバレルホルダを組み付けた状態、図５（ｄ）は高分子アクチュエータ上に端子を組み付けた状態、図５（ｅ）は支持枠にホルダを組み付けて固定した状態、図５（ｆ）はホルダにカバーを組み付けた状態、図５（ｇ）はバレルホルダにレンズユニットを組み付けて撮像レンズユニットの組み付けが完了した状態を示している。FIG. 5A is an exploded perspective view showing a procedure for assembling the imaging lens unit, FIG. 5A is a holder before assembly, FIG. 5B is a state where terminals are assembled, and FIG. 5C is a terminal and polymer actuator. FIG. 5D shows a state in which the terminal is assembled on the polymer actuator, FIG. 5E shows a state in which the holder is assembled to the support frame, and FIG. 5F shows a state in which the holder is assembled and fixed. FIG. 5G shows a state where the cover is assembled to the holder, and a state where the lens unit is assembled to the barrel holder and the imaging lens unit is assembled. 同上、カバーの斜視図である。It is a perspective view of a cover same as the above. 同上、ホルダの斜視図であるIt is a perspective view of a holder same as the above.

１ホルダ
７レンズ
６ガイドピン
８ガイド溝
１０鏡筒
１５レンズユニット
２０バレルホルダ
２２雄ネジ部
２３雌ネジ部
３０支持枠
３２，３３端子
４１変位部
４５受部材
５０カバー
５３係止孔
５４係止爪 Reference Signs List 1 holder 7 lens 6 guide pin 8 guide groove 10 lens barrel 15 lens unit 20 barrel holder 22 male screw portion 23 female screw portion 30 support frame 32, 33 terminal 41 displacement portion 45 receiving member 50 cover 53 locking hole 54 locking claw

Claims

A lens unit incorporated in the lens barrel, a holder for holding the lens barrel movably in the optical axis direction, a support frame of the holder, a polymer actuator interposed between the support frame and the holder, A displacement portion that is a plurality of pieces that are displaceable in the direction of the optical axis formed in the polymer actuator that is displaced in response to application of a voltage from a terminal, and the displacement portion that is fixed to the imaging side end surface of the barrel And a receiving member that can be engaged, and the displacement portion is displaced in response to application of a voltage from the terminal, and the lens unit is moved in the optical axis direction in accordance with the displacement amount of the displacement portion to An imaging lens unit configured to automate focusing , and is opened long in a direction perpendicular to the optical axis in at least one of the holder or the support frame in the vicinity of the overlapping portion of the holder and the support frame Long hole Openings are formed by forming an elastic deformable spring piece, with pressing said terminal to the polymer actuator side by the biasing force of the spring piece, the holder or the side plate portion that covers the outer peripheral surface of the support frame An imaging lens unit , wherein the cover is held by a holder, and the opening is closed by the side plate portion .

A connection terminal portion that is exposed to the outside from the end portion of the terminal and is connected to an external wiring member is bent in an L shape, and the connection terminal portion is housed in a stepped recess formed on the outer peripheral surface of the support frame, The imaging lens unit according to claim 1, wherein an outer peripheral surface of the support frame and the connection terminal portion are substantially flush with each other.

The locking claw provided in the holder, the image pickup lens unit of claim 1, wherein the the engaging claw to hold the cover to the holder engaged with the engaging hole formed in the cover.