JP5937416B2 - Lens driving device manufacturing method and lens driving device - Google Patents

Lens driving device manufacturing method and lens driving device Download PDF

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JP5937416B2
JP5937416B2 JP2012104247A JP2012104247A JP5937416B2 JP 5937416 B2 JP5937416 B2 JP 5937416B2 JP 2012104247 A JP2012104247 A JP 2012104247A JP 2012104247 A JP2012104247 A JP 2012104247A JP 5937416 B2 JP5937416 B2 JP 5937416B2
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optical axis
axis direction
lens
base
spring member
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JP2013231879A (en
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学 坂本
学 坂本
進一 樋屋
進一 樋屋
鈴木 忍
忍 鈴木
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Nidec Sankyo Corp
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Description

本発明は、レンズを備えた移動体がバネ部材を介して支持体に支持されたレンズ駆動装置の製造方法、およびレンズ駆動装置に関するものである。   The present invention relates to a method of manufacturing a lens driving device in which a moving body including a lens is supported by a support via a spring member, and a lens driving device.

カメラ付き携帯電話機やデジタルカメラ等に搭載されるレンズ駆動装置は、レンズを備えた移動体がバネ部材を介して支持体に支持された構成を有している。ここで、支持体は、撮像素子等を保持するベースと、ベースのレンズ光軸方向前側に固定された筒状あるいは箱形形状のケースとを備えており、ケースの内側にレンズを備えた移動体や磁気駆動機構が設けられている。また、バネ部材としては、例えば、ベースと移動体とに接続された第1バネ部材と、ケースと移動体とに接続された第2バネ部材とが用いられている(特許文献1参照)。   A lens driving device mounted on a camera-equipped mobile phone, a digital camera, or the like has a configuration in which a moving body including a lens is supported on a support via a spring member. Here, the support includes a base for holding an image sensor and the like, and a cylindrical or box-shaped case fixed to the front side of the lens in the optical axis direction of the base, and the movement provided with the lens inside the case. A body and a magnetic drive mechanism are provided. Moreover, as a spring member, the 1st spring member connected to the base and the mobile body and the 2nd spring member connected to the case and the mobile body are used, for example (refer patent document 1).

かかるレンズ駆動装置を製造する際には、例えば、移動体と第1バネ部材とを接続した後、第1バネ部材とベースとを接続する。そして、ベースにケースを被せた後、移動体と第2バネ部材とを接続し、その後、第2バネ部材とケースとを接続する。   When manufacturing such a lens driving device, for example, after connecting the moving body and the first spring member, the first spring member and the base are connected. Then, after covering the base with the case, the movable body and the second spring member are connected, and then the second spring member and the case are connected.

特開2008−112200号公報JP 2008-112200 A

レンズ駆動装置では、支持体に対して移動体がレンズ光軸方向に移動可能にしておく必要があるとともに、支持体と移動体との間に磁気駆動機構が設けられているので、支持体に対する移動体の相対位置に高い精度が求められる。   In the lens driving device, the moving body needs to be movable in the lens optical axis direction with respect to the support, and a magnetic drive mechanism is provided between the support and the moving body. High accuracy is required for the relative position of the moving body.

しかしながら、支持体、移動体、バネ部材の各々に相互の位置決め部を設けても、レンズ駆動装置では、支持体、移動体、バネ部材における加工精度や樹脂収縮に起因する寸法ばらつきや、各部材の寸法誤差の累積等の影響によって、支持体に対する移動体の相対位置に高い精度を得ることが困難である。また、支持体と移動体とを精度よく配置しても、バネ部材の寸法精度が低いと、バネ部材の付勢力によって、支持体と移動体との相対位置がずれてしまう。その結果、支持体と移動体との間や磁気駆動機構に干渉部分が発生することもある。また、支持体、移動体、バネ部材の各々に相互の位置決め部を設けても、組み立ての際、他の部材の陰になって位置決め部が見えず、作業性が悪いとともに、位置決めの際、バネ部材を変形させてしまう等の不都合もある。   However, even if a mutual positioning portion is provided for each of the support, the moving body, and the spring member, in the lens driving device, dimensional variations caused by processing accuracy and resin shrinkage in the support, the moving body, and the spring member, and each member It is difficult to obtain high accuracy in the relative position of the moving body with respect to the support body due to the influence of accumulation of dimensional errors. Even if the support body and the moving body are arranged with high accuracy, if the dimensional accuracy of the spring member is low, the relative position between the support body and the moving body is shifted by the biasing force of the spring member. As a result, an interference portion may occur between the support and the moving body or in the magnetic drive mechanism. In addition, even if a mutual positioning portion is provided on each of the support, the moving body, and the spring member, the assembly is not visible in the shadow of other members during assembly, and the workability is poor, and at the time of positioning, There is also a disadvantage that the spring member is deformed.

以上の問題点に鑑みて、本発明の課題は、支持体および移動体にバネ部材が接続する構成であっても、部材相互の位置に高い精度を確実に得ることのできるレンズ駆動装置の製造方法、およびレンズ駆動装置を提供することにある。   In view of the above problems, an object of the present invention is to manufacture a lens driving device that can reliably obtain high accuracy in the position between members even when the spring member is connected to the support and the moving body. A method and a lens driving device are provided.

上記課題を解決するために、本発明では、支持体と、前記支持体の内側に配置され、レンズが搭載される移動体と、前記支持体と前記移動体とに接続されたバネ部材と、前記支持体と前記移動体との間に配置され、前記移動体を前記支持体に対してレンズ光軸方向に磁気駆動する磁気駆動機構と、を有するレンズ駆動装置の製造方法において、前記支持体は、前記移動体に対してレンズ光軸方向後側に配置されるベースと、該ベースに対してレンズ光軸方向前側に配置されるケースと、を含み、前記バネ部材は、前記ベースと前記移動体とに接続された第1バネ部材と、前記ケースと前記移動体とに接続された第2バネ部材と、を含み、前記ベースには、前記第1バネ部材に向けて突出した突起が設けられ、前記第1バネ部材には、前記突起が嵌る穴が設けられ、前記移動体と前記移動体に接続された前記第1バネ部材を含む第1部材と、前記ベースを含む第2部材とを位置決めするにあたっては、前記第1部材を位置決めして保持する第1部材保持部が形成されているとともに、前記第1部材保持部に所定の関係を成す位置に2本のピンが形成された第1治具、および、前記第2部材を位置決めして保持する第2部材保持部が形成されているとともに、前記第2部材保持部に所定の関係を成す位置に前記2本のピンの一方が嵌まる溝と他方のピンが嵌まる穴が形成された第2治具によって、前記移動体に形成されている第1部材側基準面を基準にして前記第1部材を前記第1治具の前記第1部材保持部によってレンズ光軸に交差する方向で位置決めした状態で保持する一方、前記ベースに形成されている第2部材側基準面を基準にして前記第2部材を前記第2治具の前記第2部材保持部によってレンズ光軸に交差する方向で位置決めした状態で保持した状態で、前記第1治具および前記第2治具を基準に前記第1バネ部材と前記ベースとをレンズ光軸に交差する方向で位置決めする位置決め工程を行い前記第1バネ部材を前記ベースに接続するにあたっては、前
記2本のピンが前記一方のピンが嵌まる前記溝および前記他方のピンが嵌まる前記穴に各々嵌るように前記第1治具と前記第2治具を重ねた際、前記突起がレンズ光軸方向に直交する2方向のいずれにおいても前記突起が嵌まる前記穴の内縁から離間しており、前記突起の形成領域を含む領域に設けられた接着剤により接着されて、前記第1バネ部材と前記ベースとを連結する連結工程と、を行うことを特徴とする。
In order to solve the above problems, in the present invention, a support, a moving body that is arranged inside the support and on which a lens is mounted, a spring member connected to the support and the moving body, In a method of manufacturing a lens driving device, comprising: a magnetic drive mechanism that is disposed between the support and the moving body and magnetically drives the moving body with respect to the support in a lens optical axis direction. Includes a base disposed on the rear side in the lens optical axis direction with respect to the moving body, and a case disposed on the front side in the lens optical axis direction with respect to the base, and the spring member includes the base and the A first spring member connected to the moving body; and a second spring member connected to the case and the moving body. The base has a protrusion protruding toward the first spring member. The first spring member is provided with the protrusion. Holes are provided fitted, a first member including a first spring member connected to the moving body and the moving body, when Ru positioning knife and a second member including the base, the first member A first jig in which a first member holding portion that is positioned and held is formed, and two pins are formed at a position that forms a predetermined relationship with the first member holding portion, and the second member A second member holding portion that positions and holds the second member holding portion, and a groove into which one of the two pins fits and a second pin fit at a position that has a predetermined relationship with the second member holding portion. the second jig hole is formed, the lens optical axis of said first member relative to the first member side reference surface formed on the moving member by the first member holding portion of the first jig while held in a state of being positioned in a direction intersecting with, the While keeping a state where the second member of the second member side reference plane and a reference formed on the over scan was positioned in a direction intersecting the optical axis of the lens by said second member holding portion of the second jig in performs positioning step of positioning the first jig and the second jig in a direction intersecting with said first spring member and the base reference to the lens optical axis, said first spring member to the base Before connecting
When the first jig and the second jig are overlapped so that the two pins fit into the groove into which the one pin fits and the hole into which the other pin fits, the projections become lenses The first spring is separated from the inner edge of the hole into which the protrusion fits in any one of two directions orthogonal to the optical axis direction, and is adhered by an adhesive provided in an area including the formation area of the protrusion. And a connecting step of connecting the member and the base .

本発明では、支持体にバネ部材を接続する際、バネ部材を含む第1部材を第1治具によってレンズ光軸に交差する方向で位置決めした状態で保持する一方、支持体を含む第2部材を第2治具によってレンズ光軸に交差する方向で位置決めした状態で保持した状態で、第1治具および第2治具を基準にバネ部材と第2部材とをレンズ光軸に交差する方向で位置決めする。このため、第1部材の第1部材側基準面、および第2部材の第2部材側基準面を精度よく形成しておけば、バネ部材と第2部材側とを精度よく連結することができる。また、第1治具および第2治具を基準にバネ部材と第2部材とを位置決めするので、バネ部材と第2部材側とを位置決めする際、第1部材側基準面および第2部材側基準面を直接視認できないような場合でも、バネ部材と第2部材側とを精度よく連結することができる。 In the present invention, when connecting the spring member to the support body, the first member including the spring member is held in a state of being positioned in a direction intersecting the lens optical axis by the first jig, while the second member including the support body In a state in which the spring member and the second member intersect the lens optical axis with the first jig and the second jig as a reference, with the second jig held in a state of being positioned in a direction intersecting the lens optical axis. Position with. For this reason, if the 1st member side reference surface of the 1st member and the 2nd member side reference surface of the 2nd member are formed accurately, a spring member and the 2nd member side can be connected accurately. . Further, since the spring member and the second member are positioned with reference to the first jig and the second jig, when positioning the spring member and the second member side, the first member side reference surface and the second member side Even when the reference surface cannot be directly visually recognized, the spring member and the second member side can be accurately connected.

また、本発明では、第1バネ部材の寸法公差の累積の影響を受けずに、移動体とベースとを適正な相対位置に配置することができるので、部材間の干渉等の不具合を防止することができる。また、第1バネ部材の寸法公差の累積の影響を受けずに、移動体とベースとを適正な相対位置に配置することができるので、レンズ光軸を適正な位置に設定することができる。 Further, in the present invention, since the movable body and the base can be arranged at an appropriate relative position without being affected by the accumulation of the dimensional tolerance of the first spring member, problems such as interference between the members can be prevented. be able to. In addition, since the moving body and the base can be arranged at an appropriate relative position without being affected by the accumulation of the dimensional tolerance of the first spring member, the lens optical axis can be set at an appropriate position.

更に、本発明では、接着剤が突起に周りまで設けられている状態にして、確実な接着を行った場合でも、突起と穴の位置精度にかかわらず、第1治具および第2治具を基準に部材相互を高い位置精度で配置することができる。また、突起と穴との間が接着剤溜まり部となるので、接着剤が余計な所まで流出しないという利点がある。 Furthermore, in the present invention , the first jig and the second jig can be used regardless of the positional accuracy of the protrusion and the hole even when the adhesive is provided to the periphery and the bonding is performed securely. The members can be arranged with high positional accuracy as a reference. In addition, since the space between the protrusion and the hole serves as an adhesive reservoir, there is an advantage that the adhesive does not flow out to an extra portion.

本発明において、前記第1部材側基準面、および前記第2部材側基準面のうちの少なくとも一方の基準面は、例えば、前記第1部材または前記第2部材においてレンズ光軸方向からみたとき略矩形状を有する矩形部分の第1辺、および当該矩形部分で前記第1辺に交差する第2辺に形成されている。   In the present invention, at least one of the first member-side reference surface and the second member-side reference surface is substantially the same as viewed from the lens optical axis direction of the first member or the second member, for example. It is formed on the first side of a rectangular part having a rectangular shape and the second side intersecting the first side in the rectangular part.

この場合、前記一方の基準面には、前記第1辺において当該第1辺の延在方向で互いに離間する2つの凸部の先端面からなる基準面、または前記第2辺において当該第2辺の延在方向で互いに離間する2つの凸部の先端面からなる基準面が含まれていることが好ましい。かかる構成によれば、辺全体を精度よく形成しなくても、凸部の先端面さえ、精度よく形成すれば、部材相互の相対位置精度を高めることができる。   In this case, the one reference plane includes a reference plane composed of tip surfaces of two convex portions separated from each other in the extending direction of the first side in the first side, or the second side in the second side. It is preferable that the reference surface which consists of the front end surface of two convex parts spaced apart from each other in the extending direction is included. According to such a configuration, even if the entire side is not formed with high accuracy, the relative positional accuracy between members can be increased as long as the tip end surface of the convex portion is formed with high accuracy.

また、本発明では、前記一方の基準面には、前記第1辺および前記第2辺のうち、一方の辺において当該辺の延在方向で互いに離間する前記2つの凸部の先端面からなる基準面と、他方の辺に形成された1つの凸部の先端面からなる基準面と、が含まれていることが好ましい。かかる構成によれば、3つの凸部の先端面さえ、精度よく形成すれば、部材相互の相対位置精度を高めることができる。   Further, in the present invention, the one reference surface is composed of tip surfaces of the two convex portions that are separated from each other in the extending direction of the one side out of the first side and the second side. It is preferable that a reference surface and a reference surface composed of a tip surface of one convex portion formed on the other side are included. According to such a configuration, the relative position accuracy between the members can be improved if the tip surfaces of the three convex portions are formed with high accuracy.

本発明において、前記第1部材側基準面、および前記第2部材側基準面のうちの少なくとも一方の基準面は、前記第1部材または前記第2部材においてレンズ光軸方向からみたとき円形状の基準面であることが好ましい。   In the present invention, at least one of the first member side reference surface and the second member side reference surface has a circular shape when viewed from the lens optical axis direction in the first member or the second member. A reference plane is preferred.

例えば、前記円形状の基準面は、前記移動体において前記レンズが配置されるレンズ孔、または前記支持体において撮像素子が保持される撮像素子孔であることが好ましい。かかる構成によれば、レンズ孔や撮像素子等の光学素子が配置される孔を基準に位置決めすることができるので、特別な基準面を別途、設ける必要がない。また、レンズ孔や撮像素子等の光学素子が配置される孔を基準に位置決めすることができるので、光軸を適正に設定することができる。   For example, it is preferable that the circular reference surface is a lens hole in which the lens is disposed in the movable body or an image sensor hole in which the image sensor is held in the support. According to such a configuration, since it is possible to position with reference to a hole in which an optical element such as a lens hole or an imaging element is arranged, it is not necessary to provide a special reference surface separately. In addition, the optical axis can be set appropriately because positioning can be performed with reference to a hole in which an optical element such as a lens hole or an imaging element is disposed.

本発明では、支持体にバネ部材を接続する際、バネ部材を含む第1部材を第1治具によってレンズ光軸に交差する方向で位置決めした状態で保持する一方、支持体を含む第2部材を第2治具によってレンズ光軸に交差する方向で位置決めした状態で保持した状態で、第1治具および第2治具を基準にバネ部材と第2部材とをレンズ光軸に交差する方向で位置決めする。このため、第1部材の第1部材側基準面、および第2部材の第2部材側基準面を精度よく形成しておけば、バネ部材と第2部材側とを精度よく連結することができる。また、第1治具および第2治具を基準にバネ部材と第2部材とを位置決めするので、バネ部材と第2部材側とを位置決めする際、第1部材側基準面および第2部材側基準面を直接視認できないような場合でも、バネ部材と第2部材側とを精度よく連結することができる。 In the present invention, when connecting the spring member to the support body, the first member including the spring member is held in a state of being positioned in a direction intersecting the lens optical axis by the first jig, while the second member including the support body In a state in which the spring member and the second member intersect the lens optical axis with the first jig and the second jig as a reference, with the second jig held in a state of being positioned in a direction intersecting the lens optical axis. Position with. For this reason, if the 1st member side reference surface of the 1st member and the 2nd member side reference surface of the 2nd member are formed accurately, a spring member and the 2nd member side can be connected accurately. . Further, since the spring member and the second member are positioned with reference to the first jig and the second jig, when positioning the spring member and the second member side, the first member side reference surface and the second member side Even when the reference surface cannot be directly visually recognized, the spring member and the second member side can be accurately connected.

本発明を適用したレンズ駆動装置の全体構成を示す説明図である。It is explanatory drawing which shows the whole structure of the lens drive device to which this invention is applied. 本発明を適用したレンズ駆動装置をさらに細かく分解した分解斜視図である。It is the disassembled perspective view which decomposed | disassembled further finely the lens drive device to which this invention is applied. 本発明を適用したレンズ駆動装置をXZ面で切断した様子を示す縦断面図である。It is a longitudinal cross-sectional view which shows a mode that the lens drive device to which this invention is applied was cut | disconnected by XZ surface. 本発明を適用したレンズ駆動装置の製造方法を示す説明図である。It is explanatory drawing which shows the manufacturing method of the lens drive device to which this invention is applied. 本発明を適用したレンズ駆動装置に用いたベース、第1バネ部材およびスリーブの平面的構成を示す説明図である。It is explanatory drawing which shows the planar structure of the base used for the lens drive device to which this invention is applied, a 1st spring member, and a sleeve. 本発明を適用したレンズ駆動装置を製造するにあたって、ベースに第1バネ部材を位置決めする方法を示す説明図である。It is explanatory drawing which shows the method of positioning a 1st spring member in a base in manufacturing the lens drive device to which this invention is applied. 本発明を適用したレンズ駆動装置に用いたベース、第1バネ部材およびスリーブの細部の平面的構成を示す説明図である。It is explanatory drawing which shows the planar structure of the detail of the base used for the lens drive device to which this invention is applied, a 1st spring member, and a sleeve. 本発明を適用したレンズ駆動装置に用いたケース、第2バネ部材およびフレームの平面的構成を示す説明図である。It is explanatory drawing which shows the planar structure of the case used for the lens drive device to which this invention is applied, a 2nd spring member, and a flame | frame.

以下、本発明を実施するための形態について、図面を参照しながら説明する。なお、以下の説明においては、レンズ光軸方向を単に「光軸方向」として説明する。また、以下の説明においては、光軸Lの方向をZ軸方向とし、Z軸方向に直交する方向をX軸方向とし、X軸方向およびZ軸方向に直交する方向をY軸方向とする。また、X軸方向の一方側をX1側とし、他方側をX2側とし、Y軸方向の一方側をY1側とし、他方側をY2側とし、Z軸方向の一方側(光軸方向後側/像側)をZ1側とし、他方側(光軸方向前側/被写体側)をZ2側として表してある。また、以下に説明するレンズ駆動装置は、カメラ付き携帯電話機の他にも、様々な電子機器に取り付けることが可能である。例えば、薄型のデジタルカメラ、PHS、PDA、バーコードリーダ、監視カメラ、車の背後確認用カメラ、光学的認証機能を有するドア等に用いることができる。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, the lens optical axis direction is simply referred to as “optical axis direction”. In the following description, the direction of the optical axis L is the Z-axis direction, the direction orthogonal to the Z-axis direction is the X-axis direction, and the direction orthogonal to the X-axis direction and the Z-axis direction is the Y-axis direction. One side in the X-axis direction is the X1 side, the other side is the X2 side, one side in the Y-axis direction is the Y1 side, the other side is the Y2 side, and one side in the Z-axis direction (the rear side in the optical axis direction) / Image side) is the Z1 side, and the other side (front side in the optical axis direction / subject side) is the Z2 side. In addition to the camera-equipped mobile phone, the lens driving device described below can be attached to various electronic devices. For example, it can be used for a thin digital camera, PHS, PDA, bar code reader, surveillance camera, camera for checking the back of a car, a door having an optical authentication function, and the like.

(レンズ駆動装置の全体構成)
図1は、本発明を適用したレンズ駆動装置の全体構成を示す説明図であり、図1(a)、(b)は各々、本発明を適用したレンズ駆動装置を光軸方向前側(被写体側)の斜め方向からみた外観図、および光軸方向前側の斜め方向からみた分解斜視図である。図2は、本発明を適用したレンズ駆動装置をさらに細かく分解した分解斜視図であり、図2(a)、(b)は、レンズ駆動装置を光軸方向前側の斜め方向からみた分解斜視図、および移動体を光軸方向前側の斜め方向からみた分解斜視図である。図3は、本発明を適用したレンズ駆動装置をXZ面で切断した様子を示す縦断面図である。
(Entire configuration of lens driving device)
FIG. 1 is an explanatory diagram showing the overall configuration of a lens driving device to which the present invention is applied. FIGS. 1 (a) and 1 (b) respectively show the lens driving device to which the present invention is applied in the optical axis direction front side (subject side). 2) is an external view seen from the oblique direction, and an exploded perspective view seen from the oblique direction on the front side in the optical axis direction. FIG. 2 is an exploded perspective view in which the lens driving device to which the present invention is applied is further disassembled in detail. FIGS. 2A and 2B are exploded perspective views of the lens driving device as viewed from an oblique direction on the front side in the optical axis direction. FIG. 3 is an exploded perspective view of a moving body viewed from an oblique direction on the front side in the optical axis direction. FIG. 3 is a longitudinal sectional view showing a state in which the lens driving device to which the present invention is applied is cut along the XZ plane.

図1、図2および図3において、本形態のレンズ駆動装置1は、カメラ付き携帯電話機等に用いられる薄型カメラにおいてレンズ4を光軸L方向に沿って被写体(物体側/光軸方向前側)に近づくA方向、および被写体とは反対側のB方向(光軸方向後側)の双方向に移動させるためのものであり、略直方体形状を有している。レンズ駆動装置1は、概ね、レンズ4を備えた移動体3と、移動体3の周りを囲む支持体2と、磁気駆動機構5とを有している。   1, 2, and 3, the lens driving device 1 according to the present embodiment is configured so that the lens 4 is a subject (object side / front side in the optical axis direction) along the optical axis L direction in a thin camera used for a mobile phone with a camera or the like. For moving in both directions of the A direction approaching and the B direction (back side in the optical axis direction) opposite to the subject, and has a substantially rectangular parallelepiped shape. The lens driving device 1 generally includes a moving body 3 including a lens 4, a support body 2 surrounding the moving body 3, and a magnetic driving mechanism 5.

(支持体2の構成)
本形態のレンズ駆動装置1において、支持体2は、光軸方向後側で撮像素子やIRフィルタを保持するためのベース19と、ベース19に対して光軸方向前側に配置されたヨーク18(ケース)と、ヨーク18の前板部185を光軸方向前側で覆うカバー17と、カバー17とヨーク18との間に介在する四角枠状のシール部材16とを備えている。ベース19の中央には、撮像素子に対する光路や撮像素子を配置するスペースを確保する円形の開口部190が形成されており、かかる開口部190は、ベース19を光軸方向で貫通している。カバー17の前板部175には円形の開口部170が形成され、ヨーク18の前板部185にも略円形の開口部180が形成されている。従って、被写体からの光は、開口部170、180を介してレンズ4に入射した後、撮像素子に入射する。
(Configuration of the support 2)
In the lens driving device 1 of the present embodiment, the support 2 includes a base 19 for holding the image sensor and the IR filter on the rear side in the optical axis direction, and a yoke 18 (located on the front side in the optical axis direction with respect to the base 19). Case), a cover 17 that covers the front plate portion 185 of the yoke 18 on the front side in the optical axis direction, and a rectangular frame-shaped sealing member 16 that is interposed between the cover 17 and the yoke 18. In the center of the base 19, a circular opening 190 that secures an optical path to the image sensor and a space for arranging the image sensor is formed, and the opening 190 penetrates the base 19 in the optical axis direction. A circular opening 170 is formed in the front plate portion 175 of the cover 17, and a substantially circular opening 180 is also formed in the front plate portion 185 of the yoke 18. Therefore, the light from the subject enters the lens 4 through the openings 170 and 180 and then enters the image sensor.

レンズ駆動装置1において、ヨーク18は、磁性板を箱形状や筒形状に加工した部材であり、レンズ駆動装置1のケースとして用いられている。本形態において、ヨーク18は箱形状を有しているため、ヨーク18は、前板部185と、前板部185の外周縁から光軸方向後側に向けて延在する筒部186とを備えている。本形態において、前板部185は四角形であり、筒部186は四角筒状である。従って、筒部186は、4つの側板部181、182、183、184を備えている。   In the lens driving device 1, the yoke 18 is a member obtained by processing a magnetic plate into a box shape or a cylindrical shape, and is used as a case of the lens driving device 1. In this embodiment, since the yoke 18 has a box shape, the yoke 18 includes a front plate portion 185 and a cylindrical portion 186 extending from the outer peripheral edge of the front plate portion 185 toward the rear side in the optical axis direction. I have. In this embodiment, the front plate part 185 is a quadrangle, and the cylinder part 186 is a square cylinder. Therefore, the cylinder portion 186 includes four side plate portions 181, 182, 183, and 184.

カバー17において、前板部175は四角形であり、前板部175の外縁から光軸方向後側に向けて突出した4つの側板部171、172、173、174を備えている。カバー17において、Y方向で対向する側板部173、174には、光軸方向後側に突出した連結板部178がX軸方向の両端部の各々に形成されている。従って、カバー17をヨーク18に重ねた際、連結板部178は、ヨーク18の側板部183、184の外面に重なるので、接着や溶接によって、カバー17とヨーク18とを連結することができる。本形態では、連結板部178は、ヨーク18の側板部183、184の外面に溶接により固定されている。その際、カバー17の前板部175とヨーク18の前板部185との間には四角枠状のシール部材16が配置される。本形態において、シール部材16はゴム製である。また、カバー17とヨーク18とを連結した状態でカバー17の前板部175とヨーク18の前板部185との間には空間が形成され、かかる空間には、後述する第2バネ部材62が配置される。   In the cover 17, the front plate portion 175 has a quadrangular shape and includes four side plate portions 171, 172, 173, and 174 that protrude from the outer edge of the front plate portion 175 toward the rear side in the optical axis direction. In the cover 17, on the side plate portions 173 and 174 facing each other in the Y direction, connection plate portions 178 protruding rearward in the optical axis direction are formed at both ends in the X axis direction. Therefore, when the cover 17 is stacked on the yoke 18, the connecting plate portion 178 overlaps the outer surface of the side plate portions 183 and 184 of the yoke 18, so that the cover 17 and the yoke 18 can be connected by bonding or welding. In this embodiment, the connecting plate portion 178 is fixed to the outer surfaces of the side plate portions 183 and 184 of the yoke 18 by welding. At this time, the rectangular frame-shaped sealing member 16 is disposed between the front plate portion 175 of the cover 17 and the front plate portion 185 of the yoke 18. In this embodiment, the seal member 16 is made of rubber. Further, a space is formed between the front plate portion 175 of the cover 17 and the front plate portion 185 of the yoke 18 in a state where the cover 17 and the yoke 18 are connected, and a second spring member 62 described later is formed in the space. Is placed.

ベース19は、開口部190が中央に形成された矩形の底板部195を有しており、かかる底板部195の側面には端子14a、14bが保持されている。ベース19の底板部195では、4つの辺の各々に光軸方向前側に向けて突出した板状部191、192、193、194が形成されている。ここで、板状部191、192、193、194は、底板部195の外縁からわずか内側位置で光軸方向前側に向けて突出している。このため、底板部195には、板状部191、192、193、194の外側に、光軸方向前側に向いた段部191a、192a、193a、194aが形成されている。従って、ベース19の底板部195にヨーク18の筒部186を重ねると、ヨーク18の筒部186(側板部181、182、183、184)の光軸方向後側の縁が段部191a、192a、193a、194aで支持される。本形態において、板状部191、192は、底板部195の辺部分では、底板部195の外縁に近い位置に形成され、底板部195の角部分では、底板部195の外縁から大きく離間した位置に形成されている。このため、段部191a、192a、の幅寸法は、底板部195の辺部分では狭く、底板部195の角部分では広くなっている。   The base 19 has a rectangular bottom plate portion 195 having an opening 190 formed in the center, and terminals 14 a and 14 b are held on the side surfaces of the bottom plate portion 195. In the bottom plate portion 195 of the base 19, plate-like portions 191, 192, 193, 194 that protrude toward the front side in the optical axis direction are formed on each of the four sides. Here, the plate-like portions 191, 192, 193, 194 protrude toward the front side in the optical axis direction at a slightly inner position from the outer edge of the bottom plate portion 195. For this reason, the bottom plate portion 195 is formed with step portions 191a, 192a, 193a, 194a facing the front side in the optical axis direction outside the plate-like portions 191, 192, 193, 194. Therefore, when the cylindrical portion 186 of the yoke 18 is overlapped with the bottom plate portion 195 of the base 19, the edges on the rear side in the optical axis direction of the cylindrical portion 186 (side plate portions 181, 182, 183, 184) of the yoke 18 are stepped portions 191a, 192a. , 193a, 194a. In this embodiment, the plate-like portions 191 and 192 are formed at positions near the outer edge of the bottom plate portion 195 in the side portions of the bottom plate portion 195, and at positions that are largely separated from the outer edges of the bottom plate portion 195 at the corner portions of the bottom plate portion 195. Is formed. For this reason, the width dimensions of the step portions 191 a and 192 a are narrow at the side portion of the bottom plate portion 195 and wide at the corner portion of the bottom plate portion 195.

また、ヨーク18の筒部186(側板部181、182、183、184)は、板状部191、192、193、194の外面に重なる形状に形成されており、板状部191、192、193、194の外面は、ヨーク18の筒部186(側板部181、182、183、184)の内面に沿って延在する壁部191b、192b、193b、194bになっている。このため、板状部191、192、193、194の外面(壁部191b、192b、193b、194b)は、ヨーク18の筒部186(側板部181、182、183、184)の内面に狭い隙間を介して重なっている。従って、ヨーク18の筒部186(側板部181、182、183、184)とベース19の壁部191b、192b、193b、194bとを溶着あるいは接着によって接合すれば、ベース19とヨーク18とを固定することができる。本形態では、後述するように、ヨーク18の筒部186の内面とベース19の壁部191b、192b、193b、194bとを接着することにより、ベース19とヨーク18とを固定する。   Further, the cylindrical portion 186 (side plate portions 181, 182, 183, 184) of the yoke 18 is formed to overlap the outer surfaces of the plate portions 191, 192, 193, 194, and the plate portions 191, 192, 193 are formed. , 194 are wall portions 191b, 192b, 193b, 194b extending along the inner surface of the cylindrical portion 186 (side plate portions 181, 182, 183, 184) of the yoke 18. For this reason, the outer surfaces (wall portions 191b, 192b, 193b, 194b) of the plate-shaped portions 191, 192, 193, 194 are narrow gaps on the inner surface of the cylindrical portion 186 (side plate portions 181, 182, 183, 184) of the yoke 18. Overlap through. Therefore, if the cylindrical portion 186 (side plate portions 181, 182, 183, 184) of the yoke 18 and the wall portions 191 b, 192 b, 193 b, 194 b of the base 19 are joined by welding or bonding, the base 19 and the yoke 18 are fixed. can do. In this embodiment, as will be described later, the base 19 and the yoke 18 are fixed by bonding the inner surface of the cylindrical portion 186 of the yoke 18 and the wall portions 191b, 192b, 193b, and 194b of the base 19.

ここで、底板部195の光軸方向前側の面において、角部分には、板状部191、192、193、194より内側に小さな突起196が形成されており、かかる突起196が形成されている領域は、後述する第1バネ部材61の支持体側連結部611をベース19に固定するのに利用される。また、底板部195のY方向の一方側Y1の側面には2つの凹部195e、195fが形成されており、かかる凹部195e、195fは、端子14a、14bを設けるのに利用される。   Here, on the front surface in the optical axis direction of the bottom plate portion 195, a small protrusion 196 is formed on the inner side of the plate-shaped portions 191, 192, 193, 194, and the protrusion 196 is formed. The region is used to fix a support body side connecting portion 611 of the first spring member 61 described later to the base 19. Further, two concave portions 195e and 195f are formed on the side surface of one side Y1 in the Y direction of the bottom plate portion 195, and the concave portions 195e and 195f are used for providing the terminals 14a and 14b.

また、底板部195の光軸方向前側の面において、外縁寄りの位置には複数の凸状ストッパ198が形成されており、かかる凸状ストッパ198は、移動体3が光軸方向後側に移動した際に移動体3が当接するストッパ部として利用される。なお、凸状ストッパ198が形成されている位置では、板状部191、192、193、194の光軸方向前側の端部が切り欠かれており、移動体3が光軸方向後側に移動した際、移動体3や第1バネ部材61が板状部191、192、193、194と干渉しないようになっている。但し、凸状ストッパ198が形成されている位置では、板状部191、192、193、194の光軸方向前側の端部が切り欠かれているが、壁部191b、192b、193b、194bは、筒部186の内面に沿って全周にわたって形成されている。   Further, a plurality of convex stoppers 198 are formed at positions near the outer edge on the front surface in the optical axis direction of the bottom plate portion 195, and the convex stopper 198 moves the movable body 3 rearward in the optical axis direction. This is used as a stopper portion with which the moving body 3 comes into contact. At the position where the convex stopper 198 is formed, the front ends of the plate-like portions 191, 192, 193, 194 are cut away, and the moving body 3 moves rearward in the optical axis direction. In this case, the movable body 3 and the first spring member 61 do not interfere with the plate-like portions 191, 192, 193, 194. However, at the position where the convex stopper 198 is formed, the end portions on the front side in the optical axis direction of the plate-like portions 191, 192, 193, 194 are notched, but the wall portions 191b, 192b, 193b, 194b are It is formed over the entire circumference along the inner surface of the cylindrical portion 186.

本形態のレンズ駆動装置1をカメラ付き携帯電話機やデジタルカメラ等の機器に搭載するにあたって、機器側にソケット状の穴を設けておき、穴にレンズ駆動装置1を光軸方向後側から装着する。このため、ベース19には、ヨーク18の筒部186より外側に突き出て筒部186の外面に沿って光軸方向前側(Z方向の他方側Z2)に延在した棒状の凸状ガイド15が形成されており、かかる凸状ガイド15は、レンズ駆動装置1を機器に装着する際の向きや位置を規制するガイドとして機能する。   When mounting the lens driving device 1 of this embodiment on a device such as a mobile phone with a camera or a digital camera, a socket-like hole is provided on the device side, and the lens driving device 1 is mounted in the hole from the rear side in the optical axis direction. . Therefore, the base 19 has a rod-like convex guide 15 that protrudes outward from the cylindrical portion 186 of the yoke 18 and extends to the front side in the optical axis direction (the other side Z2 in the Z direction) along the outer surface of the cylindrical portion 186. The convex guide 15 that is formed functions as a guide that regulates the orientation and position when the lens driving device 1 is mounted on a device.

本形態において、ベース19は、凸状ガイド15も含めて一体の樹脂成形品からなり、凸状ガイド15は、底板部195においてX方向の他方側X2に位置する側面に形成されている。ここで、凸状ガイド15の筒部186の外面(側板部181の外面)と対向する部分は、筒部186の外面と凸状ガイド15との間隔を光軸方向後側より光軸方向前側で広くする形状を有しており、図3に示すように、筒部186から凸状ガイド15が突出している部分では、筒部186の光軸方向後側の縁とベース19との間には封止材7が設けられている。   In this embodiment, the base 19 is made of an integral resin molded product including the convex guide 15, and the convex guide 15 is formed on the side surface of the bottom plate portion 195 located on the other side X <b> 2 in the X direction. Here, the portion of the convex guide 15 facing the outer surface of the cylindrical portion 186 (the outer surface of the side plate portion 181) is such that the distance between the outer surface of the cylindrical portion 186 and the convex guide 15 is the front side in the optical axis direction from the rear side in the optical axis direction. As shown in FIG. 3, at the portion where the convex guide 15 protrudes from the cylindrical portion 186, it is between the base 19 and the edge on the rear side in the optical axis direction of the cylindrical portion 186. Is provided with a sealing material 7.

本形態では、凸状ガイド15の筒部186の外面と対向する部分には、光軸方向前側に向いたテーパ面152aが形成されており、かかるテーパ面152aによって、筒部186の外面と凸状ガイド15との間隔は、光軸方向後側より光軸方向前側で広くなっている。より具体的には、凸状ガイド15は、ベース19から光軸方向に直交する方向に延在して筒部186より外側に突き出た胴部151と、胴部151の外端から筒部186の外面に沿って光軸方向前側に延在する頭部152とを備えており、頭部152の筒部186の外面と対向する部分にテーパ面152aが形成されている。本形態では、胴部151の光軸方向前側に向く面151aは、胴部151の突出方向(X方向)および光軸方向(Z方向)に直交する幅方向(Y方向)の両側が円弧面またはテーパ面になっている。   In this embodiment, a portion of the convex guide 15 facing the outer surface of the cylindrical portion 186 is formed with a tapered surface 152a facing the front side in the optical axis direction, and the tapered surface 152a projects the outer surface of the cylindrical portion 186. The distance from the guide 15 is wider on the front side in the optical axis direction than on the rear side in the optical axis direction. More specifically, the convex guide 15 extends from the base 19 in a direction orthogonal to the optical axis direction and protrudes outward from the cylindrical portion 186, and the cylindrical portion 186 from the outer end of the cylindrical portion 151. And a head portion 152 extending forward in the optical axis direction along the outer surface of the head portion 152, and a tapered surface 152 a is formed on a portion of the head portion 152 that faces the outer surface of the cylindrical portion 186. In this embodiment, the surface 151a of the body 151 facing the front side in the optical axis direction is an arc surface on both sides of the projecting direction (X direction) of the body 151 and the width direction (Y direction) orthogonal to the optical axis direction (Z direction). Or it has a tapered surface.

かかる凸状ガイド15を外側に突出させるにあたって、筒部186の光軸方向後側の縁には、凸状ガイド15が突出する切り欠き181a(図2参照)が形成されている。ここで、切り欠き181aの形状は、凸状ガイド15において切り欠き181a内に位置する部分(胴部151)の形状と同一または略同一であり、Y方向の両側が円弧状または斜めになっている。   When projecting the convex guide 15 outward, a notch 181a (see FIG. 2) from which the convex guide 15 projects is formed on the rear edge of the cylindrical portion 186 in the optical axis direction. Here, the shape of the notch 181a is the same as or substantially the same as the shape of the convex guide 15 located in the notch 181a (body portion 151), and both sides in the Y direction are arc-shaped or slanted. Yes.

(移動体3の構成)
図2および図3において、移動体3は、内側にレンズホルダ37を介してレンズ4や絞り等を保持するスリーブ30を有しており、スリーブ30は、レンズ4等を保持する円筒部31と、円筒部31の光軸方向後側の端部から外側に広がるフランジ部33とを備えている。本形態において、フランジ部33は四角形である。フランジ部33の光軸方向前側の面には、後述するコイル51を保持するコイル保持面34が形成されており、かかるコイル保持面34は、光軸方向に直交する平坦面として略全周にわたって形成されている。また、フランジ部33の光軸方向前側の面において、フランジ部33の角部に相当する部分には、コイル保持面34よりも光軸方向前側に位置する台形形状の段部が形成されており、かかる段部は、移動体3が光軸方向前側に移動した際に、後述する磁石部55が当接するストッパ部35として利用される。
(Configuration of moving body 3)
2 and 3, the moving body 3 has a sleeve 30 that holds the lens 4, the diaphragm, and the like via a lens holder 37 on the inner side. The sleeve 30 includes a cylindrical portion 31 that holds the lens 4 and the like. And a flange portion 33 that spreads outward from the end of the cylindrical portion 31 on the rear side in the optical axis direction. In this embodiment, the flange portion 33 is a quadrangle. A coil holding surface 34 for holding a coil 51 to be described later is formed on the front surface of the flange portion 33 in the optical axis direction. The coil holding surface 34 extends over substantially the entire circumference as a flat surface orthogonal to the optical axis direction. Is formed. Further, on the surface on the front side in the optical axis direction of the flange portion 33, a trapezoidal step portion located on the front side in the optical axis direction with respect to the coil holding surface 34 is formed in a portion corresponding to the corner portion of the flange portion 33. Such a step portion is used as a stopper portion 35 with which a magnet portion 55 described later comes into contact when the movable body 3 moves forward in the optical axis direction.

また、スリーブ30において、フランジ部33の4つの辺に相当する各々の部分には、フランジ部33と円筒部31とに跨るようにコイル受け部36が形成されている。本形態において、コイル受け部36は、コイル51の内面を受ける受け面として利用される。その際、コイル受け部36の光軸方向前側には、コイル51と円筒部31との間に隙間が発生するので、かかる隙間を利用して、コイル51はスリーブ30に接着固定される。   In the sleeve 30, a coil receiving portion 36 is formed at each portion corresponding to the four sides of the flange portion 33 so as to straddle the flange portion 33 and the cylindrical portion 31. In this embodiment, the coil receiving portion 36 is used as a receiving surface that receives the inner surface of the coil 51. At this time, since a gap is generated between the coil 51 and the cylindrical portion 31 on the front side in the optical axis direction of the coil receiving portion 36, the coil 51 is bonded and fixed to the sleeve 30 using the gap.

このような構成のスリーブ30に対してコイル51を搭載するにあたって、コイル51は、光軸方向の幅寸法が光軸方向に直交する方向の厚さ寸法に比して大の筒状コイルとして構成されている。本形態において、コイル51は四角筒形状を有しており、光軸方向からみたとき、コイル51は正方形である。かかるコイル51は、フランジ部33の外側端部より僅かに内側位置に配置される。   When the coil 51 is mounted on the sleeve 30 having such a configuration, the coil 51 is configured as a cylindrical coil having a width dimension in the optical axis direction larger than a thickness dimension in a direction orthogonal to the optical axis direction. Has been. In this embodiment, the coil 51 has a square tube shape, and the coil 51 is square when viewed from the optical axis direction. The coil 51 is disposed at a position slightly inside the outer end portion of the flange portion 33.

ここで、フランジ部33の角部分には、コイル51の内周面、フランジ部33の光軸方向前側の面、および円筒部31の外周面によって、光軸方向前側に向けて開口する凹部39が形成されている。かかる凹部39は、以下に説明する磁石部55が位置する部分として利用される。   Here, in the corner portion of the flange portion 33, the concave portion 39 opened toward the front side in the optical axis direction by the inner peripheral surface of the coil 51, the front surface in the optical axis direction of the flange portion 33, and the outer peripheral surface of the cylindrical portion 31. Is formed. The concave portion 39 is used as a portion where a magnet portion 55 described below is located.

(磁気駆動機構5の構成)
本形態では、移動体3とヨーク18との間に磁気駆動機構5が構成されている。より具体的には、移動体3とヨーク18との間において、移動体3側に保持されたコイル51と、支持体2側に保持された磁石部55とによって、移動体3を光軸方向に駆動する磁気駆動機構5が構成されている。本形態において、磁石部55は、ヨーク18の前板部185の光軸方向後側の面において、筒部186から内側へ所定の寸法隔てた位置に設けられている。磁石部55は、ヨーク18の前板部185の光軸方向後側の面において、筒部186から所定の寸法隔てた位置に固着された永久磁石56と、永久磁石56の光軸方向後側の面に固着された磁性板57とからなる。磁石部55は、ヨーク18の4つの角部分の各々に配置されており、ヨーク18の角部分の形状に対応する三角柱形状を有している。より具体的には、磁石部55は、三角柱状の永久磁石56と、永久磁石56の底部と重なる三角形の磁性板57とから構成されており、永久磁石56および磁性板57は、光軸方向からみたとき、略直角二等辺三角形になっている。ここで、永久磁石56は、上端面の磁極と下端面の磁極とが異なるように光軸方向に着磁されている。例えば、永久磁石56の光軸方向前側部がS極であり、光軸方向後側端部はN極である。
(Configuration of magnetic drive mechanism 5)
In this embodiment, the magnetic drive mechanism 5 is configured between the moving body 3 and the yoke 18. More specifically, between the moving body 3 and the yoke 18, the moving body 3 is moved in the optical axis direction by a coil 51 held on the moving body 3 side and a magnet portion 55 held on the support body 2 side. A magnetic drive mechanism 5 is configured to be driven. In the present embodiment, the magnet portion 55 is provided at a position separated from the tube portion 186 by a predetermined dimension on the rear surface in the optical axis direction of the front plate portion 185 of the yoke 18. The magnet portion 55 includes a permanent magnet 56 fixed to a position separated by a predetermined dimension from the cylindrical portion 186 on the surface on the rear side in the optical axis direction of the front plate portion 185 of the yoke 18, and the rear side in the optical axis direction of the permanent magnet 56. And a magnetic plate 57 fixed to the surface. The magnet portion 55 is disposed at each of the four corner portions of the yoke 18 and has a triangular prism shape corresponding to the shape of the corner portion of the yoke 18. More specifically, the magnet portion 55 includes a triangular prism-shaped permanent magnet 56 and a triangular magnetic plate 57 that overlaps the bottom of the permanent magnet 56. The permanent magnet 56 and the magnetic plate 57 are in the optical axis direction. When viewed from the side, it is a substantially right-angled isosceles triangle. Here, the permanent magnet 56 is magnetized in the optical axis direction so that the magnetic pole on the upper end surface is different from the magnetic pole on the lower end surface. For example, the front side in the optical axis direction of the permanent magnet 56 is the S pole, and the rear side end in the optical axis direction is the N pole.

かかる磁石部55は、ヨーク18の前板部185の光軸方向後側の面から光軸方向後側に突出し、磁石部55の光軸方向後側端部は、移動体3においてスリーブ30のフランジ部33の角部分に構成された凹部39の内側に位置している。このため、磁石部55の光軸方向後側端部は、略直角二等辺三角形において直交する2辺に相当する面が各々、コイル51の内周面と対向している。従って、磁石部55において磁性板57と、ヨーク18の筒部186との間に生成された磁界は、コイル51に鎖交することになる。それ故、コイル51に通電すると、移動体3は光軸方向への推力を受けることになる。ここで、磁石部55の光軸方向後側端部とフランジ部33のストッパ部35との間に形成される隙間は、磁石部55の光軸方向後側端部とフランジ部33のコイル保持面34との間に形成される隙間よりも、光軸方向における寸法が狭くなっている。すなわち、ストッパ部35は、コイル保持面34よりも光軸方向前側に位置する。また、磁石部55は、光軸L方向からみたとき、フランジ部33のストッパ部35と重なっている。従って、移動体3が光軸方向前側に移動した際、磁石部55の光軸方向後側端部とフランジ部33のストッパ部35とが当接し、移動体3の光軸方向前側への可動範囲が制限される。   The magnet portion 55 protrudes rearward in the optical axis direction from the surface on the rear side in the optical axis direction of the front plate portion 185 of the yoke 18, and the rear end portion in the optical axis direction of the magnet portion 55 in the movable body 3 of the sleeve 30. It is located inside a recess 39 formed in a corner portion of the flange portion 33. For this reason, at the rear end portion in the optical axis direction of the magnet portion 55, surfaces corresponding to two sides orthogonal to each other in a substantially right-angled isosceles triangle respectively face the inner peripheral surface of the coil 51. Accordingly, the magnetic field generated between the magnetic plate 57 and the cylindrical portion 186 of the yoke 18 in the magnet portion 55 is linked to the coil 51. Therefore, when the coil 51 is energized, the moving body 3 receives thrust in the optical axis direction. Here, the gap formed between the rear end portion of the magnet portion 55 in the optical axis direction and the stopper portion 35 of the flange portion 33 holds the coil between the rear end portion of the magnet portion 55 in the optical axis direction and the flange portion 33. The dimension in the optical axis direction is narrower than the gap formed between the surface 34. That is, the stopper portion 35 is located on the front side in the optical axis direction with respect to the coil holding surface 34. The magnet portion 55 overlaps with the stopper portion 35 of the flange portion 33 when viewed from the optical axis L direction. Therefore, when the moving body 3 moves to the front side in the optical axis direction, the rear end portion in the optical axis direction of the magnet portion 55 and the stopper portion 35 of the flange portion 33 come into contact with each other, and the movable body 3 can move to the front side in the optical axis direction. The range is limited.

(バネ部材の構成)
図2および図3に示すように、移動体3は、第1バネ部材61および第2バネ部材62によって、光軸L方向に移動可能に支持体2に支持されている。第1バネ部材61および第2バネ部材62は、例えば、ベリリウム銅等からなる金属製の薄板から形成された板バネ状のジンバルバネである。
(Structure of spring member)
As shown in FIGS. 2 and 3, the movable body 3 is supported by the support body 2 by the first spring member 61 and the second spring member 62 so as to be movable in the optical axis L direction. The first spring member 61 and the second spring member 62 are plate spring-like gimbal springs formed from, for example, a thin metal plate made of beryllium copper or the like.

第1バネ部材61は、ベース19の4つの角部分に連結される4つの支持体側連結部611と、スリーブ30の後側端縁に連結される移動体側連結部612と、支持体側連結部611と移動体側連結部612とを接続する4本のアーム部613とを備えている。本形態において、移動体側連結部612には、計6つの穴612aが形成されており、かかる穴612aにスリーブ30の光軸方向後側の端部に形成された突起(図示せず)が嵌る。また、4つの支持体側連結部611には穴611aが各々形成されており、かかる穴611aにベース19の光軸方向前側の端面に形成された突起196が嵌る。   The first spring member 61 includes four support body side connection portions 611 connected to the four corner portions of the base 19, a moving body side connection portion 612 connected to the rear end edge of the sleeve 30, and a support body side connection portion 611. And four arm portions 613 for connecting the movable body side connecting portion 612 to each other. In this embodiment, a total of six holes 612a are formed in the moving body side connecting portion 612, and protrusions (not shown) formed at the end on the rear side in the optical axis direction of the sleeve 30 are fitted into the holes 612a. . In addition, holes 611a are respectively formed in the four support body side connecting portions 611, and projections 196 formed on the front end surface of the base 19 in the optical axis direction are fitted into the holes 611a.

第2バネ部材62は、ヨーク18の前板部185の光軸方向前側の面に連結される枠状の支持体側連結部621と、スリーブ30の光軸方向前側端部に連結される円環状の移動体側連結部622と、支持体側連結部621と移動体側連結部622とを接続する4本のアーム部623とを備えている。   The second spring member 62 is a ring-shaped support member side connecting portion 621 connected to the front surface of the front plate portion 185 of the yoke 18 in the optical axis direction, and an annular shape connected to the front end portion of the sleeve 30 in the optical axis direction. The movable body side connecting portion 622 and four arm portions 623 that connect the supporting body side connecting portion 621 and the moving body side connecting portion 622 are provided.

かかる第1バネ部材61および第2バネ部材62は、移動体3を光軸方向に変位可能に支持するとともに、移動体3の光軸周りの回転を阻止する機能を担っている。なお、本形態では、第2バネ部材62の支持体側連結部621とヨーク18の前板部185とを連結するにあたっては溶接を利用する。その際、支持体側連結部621が損傷しないように、第2バネ部材62の支持体側連結部621には、光軸方向前側に枠状のフレーム11が接合されており、かかるフレーム11によって、第2バネ部材62の支持体側連結部621が補強されている。   The first spring member 61 and the second spring member 62 support the moving body 3 so as to be displaceable in the optical axis direction, and have a function of preventing the rotation of the moving body 3 around the optical axis. In this embodiment, welding is used to connect the support-side connecting portion 621 of the second spring member 62 and the front plate portion 185 of the yoke 18. At this time, the frame-shaped frame 11 is joined to the support-side coupling portion 621 of the second spring member 62 on the front side in the optical axis direction so that the support-side coupling portion 621 is not damaged. The support body side connecting portion 621 of the two spring member 62 is reinforced.

本形態において、第2バネ部材62は、全体が一体として形成されている。これに対して、第1バネ部材61は、電気的に分離された2枚のバネ片からなり、コイル51の端部がハンダ等により電気的に接続されている。また、第1バネ部材61を構成するバネ片は、端子14a、14bに導通している。従って、端子14a、14bに給電すれば、コイル51に給電することができる。   In this embodiment, the second spring member 62 is formed integrally as a whole. On the other hand, the first spring member 61 includes two electrically separated spring pieces, and the end of the coil 51 is electrically connected by solder or the like. Further, the spring pieces constituting the first spring member 61 are electrically connected to the terminals 14a and 14b. Therefore, if the terminals 14a and 14b are fed, the coil 51 can be fed.

(動作)
本形態のレンズ駆動装置1において、まず、磁気駆動機構5が停止している待機期間中、第1バネ部材61および第2バネ部材62の付勢力によって、移動体3は、光軸方向後側に位置し、スリーブ30がベース19に弾性をもって当接している状態にある。
(Operation)
In the lens driving device 1 of the present embodiment, first, during the standby period in which the magnetic driving mechanism 5 is stopped, the moving body 3 is moved rearward in the optical axis direction by the biasing force of the first spring member 61 and the second spring member 62. The sleeve 30 is in contact with the base 19 with elasticity.

このような状態において、磁気駆動機構5のコイル51に所定方向の電流を流すと、コイル51は、光軸方向前側の電磁力を受けることになる。これにより、コイル51が固着されたスリーブ30(移動体3)は、光軸方向前側に移動し始めることになる。このとき、第1バネ部材61とスリーブ30の後側端部との間、および第2バネ部材62とスリーブ30の前側端部との間には、それぞれスリーブ30の移動を規制する弾性力が発生する。このため、スリーブ30を光軸方向前側に移動させようとする電磁力と、スリーブ30の移動を規制する弾性力とが釣り合ったとき、スリーブ30は停止する。その際、コイル51に流す電流量を調整することで、スリーブ30(移動体3)を所望の位置に停止させることができる。   In such a state, when a current in a predetermined direction is passed through the coil 51 of the magnetic drive mechanism 5, the coil 51 receives an electromagnetic force on the front side in the optical axis direction. As a result, the sleeve 30 (moving body 3) to which the coil 51 is fixed starts to move forward in the optical axis direction. At this time, an elastic force that restricts the movement of the sleeve 30 is provided between the first spring member 61 and the rear end portion of the sleeve 30 and between the second spring member 62 and the front end portion of the sleeve 30. Occur. For this reason, when the electromagnetic force that attempts to move the sleeve 30 forward in the optical axis direction and the elastic force that restricts the movement of the sleeve 30 are balanced, the sleeve 30 stops. At that time, the sleeve 30 (the moving body 3) can be stopped at a desired position by adjusting the amount of current flowing through the coil 51.

(製造方法の概要)
図4は、本発明を適用したレンズ駆動装置1の製造方法を示す説明図である。図4に示すように、本発明を適用したレンズ駆動装置1を製造するには、まず、工程ST11において、スリーブ30のコイル保持面34やコイル受け部36を利用してスリーブ30にコイル51を接着固定する。また、スリーブ30の光軸方向後側の面に第1バネ部材61を固着する。より具体的には、図2等を参照して説明したように、第1バネ部材61の支持体側連結部611に形成されている6つの穴612aにスリーブ30の光軸方向後側の端部に形成された突起(図示せず)を嵌めた後、スリーブ30と第1バネ部材61の支持体側連結部611とを溶接、接着等の方法で固定する。また、工程ST12においてベース19に端子14a、14bを固定する。また、工程ST13においては、ヨーク18の内側に永久磁石56および磁性板57からなる磁石部55を設けておく。また、工程ST14においては、第2バネ部材62の支持体側連結部621にフレーム11を重ね、この状態で接合する。また、工程ST15においては、カバー17の内側にシール部材16を取り付けておく。
(Outline of manufacturing method)
FIG. 4 is an explanatory view showing a manufacturing method of the lens driving device 1 to which the present invention is applied. As shown in FIG. 4, in order to manufacture the lens driving device 1 to which the present invention is applied, first, in step ST11, the coil 51 is placed on the sleeve 30 using the coil holding surface 34 and the coil receiving portion 36 of the sleeve 30. Adhere and fix. Further, the first spring member 61 is fixed to the rear surface of the sleeve 30 in the optical axis direction. More specifically, as described with reference to FIG. 2 and the like, the end portions on the rear side in the optical axis direction of the sleeve 30 are formed in the six holes 612a formed in the support body side connection portion 611 of the first spring member 61. After fitting a projection (not shown) formed on the sleeve 30, the sleeve 30 and the support-side connecting portion 611 of the first spring member 61 are fixed by a method such as welding or adhesion. In step ST12, the terminals 14a and 14b are fixed to the base 19. In step ST13, a magnet portion 55 including a permanent magnet 56 and a magnetic plate 57 is provided inside the yoke 18. Moreover, in process ST14, the flame | frame 11 is piled up on the support body side connection part 621 of the 2nd spring member 62, and it joins in this state. In step ST15, the seal member 16 is attached to the inside of the cover 17.

次に、工程ST21においては、スリーブ30に固定され第1バネ部材61の支持体側連結部611をベース19に接着等の方法で固定する。かかる工程の詳細については、図5〜図7を参照して後述する。 Next, in step ST21, to secure the support side connecting portion 611 of the first spring member 61 fixed to the sleeve 30 by a method such as adhesion to the base 19. Details of this process will be described later with reference to FIGS.

次に、工程ST22においては、工程ST13において磁石部55を取り付けたヨーク18を、移動体3を覆うように重ね、ヨーク18の筒部186とベース19とを接着固定する。より具体的には、図2等を参照して説明したベース19の壁部191b、192b、193b、194bに接着剤を塗布した後、ベース19にヨーク18を被せ、その後、接着剤を硬化させる。   Next, in step ST22, the yoke 18 to which the magnet portion 55 is attached in step ST13 is overlapped so as to cover the movable body 3, and the cylindrical portion 186 of the yoke 18 and the base 19 are bonded and fixed. More specifically, after an adhesive is applied to the walls 191b, 192b, 193b, 194b of the base 19 described with reference to FIG. 2 etc., the base 19 is covered with the yoke 18, and then the adhesive is cured. .

次に、工程ST23においては、工程ST14においてフレーム11を第2バネ部材62に取り付けた後、第2バネ部材62の移動体側連結部622を移動体3の光軸方向前側の端部に接続した後、バネ部材62の支持体側連結部621をケース18の前板部185に接続する。かかる工程の詳細については、図8を参照して後述する。   Next, in step ST23, after attaching the frame 11 to the second spring member 62 in step ST14, the moving body side connecting portion 622 of the second spring member 62 is connected to the end of the moving body 3 on the front side in the optical axis direction. Thereafter, the support side coupling portion 621 of the spring member 62 is connected to the front plate portion 185 of the case 18. Details of this process will be described later with reference to FIG.

次に、工程ST24においては、工程ST15において内側にシール部材16を取り付けたカバー17をケース18の筒部186に固定すると、レンズ駆動装置1の組み立てが完了する。なお、レンズ駆動装置1を組み立てた後は、ケース18の筒部186(側板部181)の外面と凸状ガイド15とに挟まれた個所にニードル(図示せず)の先端部を差し込み、ニードルの先端部から封止材7(図3参照)を吐出して、切り欠き181aの内縁とベース19との間を塗布し、その後、封止材7を硬化させる。その際、切り欠き181aの内縁と凸状ガイド15の胴部151との間に対して、切り欠き181aの内縁に沿うように封止材7を塗布する。   Next, in step ST24, when the cover 17 having the sealing member 16 attached to the inner side in step ST15 is fixed to the cylindrical portion 186 of the case 18, the assembly of the lens driving device 1 is completed. After the lens driving device 1 is assembled, the tip of a needle (not shown) is inserted into a portion sandwiched between the outer surface of the cylindrical portion 186 (side plate portion 181) of the case 18 and the convex guide 15, and the needle Then, the sealing material 7 (see FIG. 3) is discharged from the front end portion, and the space between the inner edge of the notch 181a and the base 19 is applied, and then the sealing material 7 is cured. At that time, the sealing material 7 is applied along the inner edge of the notch 181 a between the inner edge of the notch 181 a and the body 151 of the convex guide 15.

(工程ST22の詳細説明)
図5は、本発明を適用したレンズ駆動装置1に用いたベース19、第1バネ部材61およびスリーブ30の平面的構成を示す説明図であり、図5(a)、(b)、(c)、(d)、(e)は、ベース19、第1バネ部材61およびスリーブ30を重ねて配置したときの平面図、ベース19および第1バネ部材61を重ねて配置したときの平面図、スリーブ30の平面図、ベース19の平面図、および第1バネ部材61の平面図である。図6は、本発明を適用したレンズ駆動装置1を製造するにあたって、ベース19に第1バネ部材61を位置決めする方法を示す説明図である。図7は、本発明を適用したレンズ駆動装置1に用いたベース19、第1バネ部材61およびスリーブ30の細部の平面的構成を示す説明図であり、図7(a)、(b)、(c)は、ベース19の基準面の説明図、スリーブ30の基準面の説明図、およびベース19と第1バネ部材61の連結部分の説明図である。
(Detailed description of process ST22)
FIG. 5 is an explanatory view showing a planar configuration of the base 19, the first spring member 61 and the sleeve 30 used in the lens driving device 1 to which the present invention is applied, and FIGS. 5 (a), 5 (b) and 5 (c). ), (D), and (e) are a plan view when the base 19, the first spring member 61 and the sleeve 30 are arranged in an overlapping manner, and a plan view when the base 19 and the first spring member 61 are arranged in an overlapping manner, FIG. 4 is a plan view of a sleeve 30, a plan view of a base 19, and a plan view of a first spring member 61. FIG. 6 is an explanatory view showing a method of positioning the first spring member 61 on the base 19 in manufacturing the lens driving device 1 to which the present invention is applied. FIG. 7 is an explanatory diagram showing a detailed planar configuration of the base 19, the first spring member 61, and the sleeve 30 used in the lens driving device 1 to which the present invention is applied, and FIG. 7 (a), FIG. (C) is an explanatory view of the reference surface of the base 19, an explanatory view of the reference surface of the sleeve 30, and an explanatory view of a connecting portion between the base 19 and the first spring member 61.

図4を参照して説明した工程ST21においては、スリーブ30に固定された第1バネ部材61の支持体側連結部611をベース19に接着等の方法で固定する。かかる工程を行うにあたって、本形態では、まず、位置決め工程において、図4および図6に示すように、第1バネ部材61および移動体3を含む第1部材10aと、ベース19(支持体2)を含む第2部材10bとを第1治具91および第2治具92を用いて光軸方向に交差する2方向(X方向およびY方向)で位置決めした後、連結工程において、図4および図7(a)、(b)に示すように、第1バネ部材61とベース19とを連結する。   In step ST21 described with reference to FIG. 4, the support side coupling portion 611 of the first spring member 61 fixed to the sleeve 30 is fixed to the base 19 by a method such as adhesion. In performing this process, in this embodiment, first, in the positioning process, as shown in FIGS. 4 and 6, the first member 10a including the first spring member 61 and the moving body 3, and the base 19 (support 2). And the second member 10b including the second member 10b using the first jig 91 and the second jig 92 in two directions (X direction and Y direction) intersecting the optical axis direction. 7 (a) and 7 (b), the first spring member 61 and the base 19 are connected.

より具体的には、位置決め工程では、まず、図5(c)に示すように、スリーブ30のフランジ部33の4つの辺351、352、353、354のうち、X方向の一方側X1の辺352(第1辺)、およびY方向の他方側Y2の辺354(第2辺)を第1部材10a側の第1部材側基準面とし、かかる第1部材側基準面を基準に、第1部材10aを第1治具91によって光軸方向に交差する2方向(X方向およびY方向)で位置決めした状態で保持する。本形態では、図7(b)に拡大して示すように、スリーブ30のX方向の一方側X1の辺352(第1辺)の両端には凸部307が形成されており、かかる凸部307の先端面307aと、Y方向の他方側Y2の辺354(第2辺)の一方の端部309を第1部材側基準面として利用する。ここで、端部309は、辺354(第2辺)に凸部として形成されており、かかる端部309の先端面309aを第1部材側基準面として利用する。従って、第1部材側基準面は、2つの凸部307の先端面307aと、1つの端部309(凸部)の先端面309aとからなる。   More specifically, in the positioning step, first, as shown in FIG. 5C, among the four sides 351, 352, 353, and 354 of the flange portion 33 of the sleeve 30, the side on the one side X1 in the X direction. 352 (first side) and side 354 (second side) on the other side Y2 in the Y direction are set as a first member side reference surface on the first member 10a side, and the first member side reference surface is used as a reference. The member 10a is held in a state of being positioned in two directions (X direction and Y direction) intersecting the optical axis direction by the first jig 91. In this embodiment, as shown in an enlarged view in FIG. 7B, convex portions 307 are formed at both ends of the side 352 (first side) on one side X1 of the sleeve 30 in the X direction. The end surface 307a of 307 and one end 309 of the side 354 (second side) on the other side Y2 in the Y direction are used as the first member side reference surface. Here, the end portion 309 is formed as a convex portion on the side 354 (second side), and the front end surface 309a of the end portion 309 is used as a first member side reference surface. Therefore, the first member-side reference surface is composed of the tip surfaces 307a of the two convex portions 307 and the tip surface 309a of one end portion 309 (convex portion).

また、本形態では、図5(d)に示すように、ベース19の矩形の底板部195の4つの辺195a〜195dのち、X方向の一方側X1の辺195b(第1辺)、およびY方向の他方側Y2の辺195d(第2辺)を第2部材10b側の第2部材側基準面とし、かかる第2部材側基準面を基準に、第2部材10bを第2治具92によって光軸方向に交差する2方向(X方向およびY方向)で位置決めした状態で保持する。本形態では、図7(a)に拡大して示すように、ベース19のX方向の一方側X1の辺195b(第1辺)の両端には凸部197が形成されており、かかる凸部197の先端面197aと、Y方向の他方側Y2の辺195d(第2辺)の一方の端部199を第2部材側基準面として利用する。ここで、端部199は、辺195d(第2辺)に凸部として形成されており、かかる端部199の先端面199aを第2部材側基準面として利用する。従って、第2部材側基準面は、2つの凸部197の先端面197aと、1つの端部199(凸部)の先端面199aとからなる。   Further, in this embodiment, as shown in FIG. 5D, after the four sides 195a to 195d of the rectangular bottom plate portion 195 of the base 19, the side 195b (first side) on one side X1 in the X direction, and Y The side 195d (second side) on the other side Y2 in the direction is set as a second member side reference surface on the second member 10b side, and the second member 10b is moved by the second jig 92 on the basis of the second member side reference surface. It is held in a state of being positioned in two directions (X direction and Y direction) intersecting the optical axis direction. In this embodiment, as shown in an enlarged view in FIG. 7A, convex portions 197 are formed at both ends of the side 195 b (first side) on one side X <b> 1 of the base 19 in the X direction. The end surface 197a of 197 and one end portion 199 of the side 195d (second side) on the other side Y2 in the Y direction are used as the second member side reference surface. Here, the end portion 199 is formed as a convex portion on the side 195d (second side), and the front end surface 199a of the end portion 199 is used as a second member side reference surface. Therefore, the second member-side reference surface is composed of the tip surfaces 197a of the two convex portions 197 and the tip surface 199a of one end portion 199 (convex portion).

一方、図6に示すように、第1治具91には、第1部材10aの第1部材側基準面を基準にして第1部材10aを位置決めして保持する第1部材保持部91eが形成されているとともに、第1部材保持部91eに所定の関係を成す位置に2本のピン91a、91bが形成されている。また、第2治具92には、第2部材10bの第2部材側基準面を基準にして第2部材10bを位置決めして保持する第2部材保持部92eが形成されているとともに、第2部材保持部92eに所定の関係を成す位置に、ピン91aが嵌まる溝92aと、ピン91bが嵌まる穴92bとが形成されている。従って、ベース19のうち、突起196が形成されている領域(図2(a)および図7(a)、(c)参照)に接着剤を塗布した後、2本のピン91a、91bが溝92aおよび穴92bに各々嵌るように、第1治具91と第2治具92とを重ねると、第1部材10aと第2部材10bとが位置決めされる。従って、この状態で接着剤を硬化させ、その後、第1治具91を外せば、第1バネ部材61の支持体側連結部611の穴611aにベース19の突起196が嵌った状態で、第1バネ部材61の支持体側連結部611とベース19とが連結される。   On the other hand, as shown in FIG. 6, the first jig 91 is formed with a first member holding portion 91e that positions and holds the first member 10a with reference to the first member side reference surface of the first member 10a. In addition, two pins 91a and 91b are formed at positions that have a predetermined relationship with the first member holding portion 91e. The second jig 92 is formed with a second member holding portion 92e for positioning and holding the second member 10b with reference to the second member side reference surface of the second member 10b. A groove 92a into which the pin 91a is fitted and a hole 92b into which the pin 91b is fitted are formed at a position having a predetermined relationship with the member holding portion 92e. Therefore, after the adhesive is applied to the region of the base 19 where the protrusions 196 are formed (see FIG. 2A, FIG. 7A, and FIG. 7C), the two pins 91a and 91b are grooved. When the first jig 91 and the second jig 92 are overlapped so as to fit into the holes 92a and the holes 92b, the first member 10a and the second member 10b are positioned. Therefore, if the adhesive is cured in this state, and then the first jig 91 is removed, the first protrusion 196 of the base 19 is fitted in the hole 611a of the support side coupling portion 611 of the first spring member 61. The support side coupling portion 611 of the spring member 61 and the base 19 are coupled.

かかる方法によれば、第1バネ部材61の寸法公差の影響を受けずに、移動体3とベース19とを適正な相対位置に配置することができるので、部材間の干渉等の不具合を防止することができる。また、第1バネ部材61の寸法公差の影響を受けずに、移動体3とベース19とを適正な相対位置に配置することができるので、レンズ光軸を適正な位置に設定することができる。   According to such a method, the movable body 3 and the base 19 can be disposed at an appropriate relative position without being affected by the dimensional tolerance of the first spring member 61, so that problems such as interference between members can be prevented. can do. Further, since the movable body 3 and the base 19 can be arranged at an appropriate relative position without being affected by the dimensional tolerance of the first spring member 61, the lens optical axis can be set at an appropriate position. .

ここで、突起196は、図7(c)に示すように、光軸方向に直交する2方向(X方向およびY方向)のいずれにおいても穴611aの内縁から離間しており、突起196は、光軸方向に直交する2方向(X方向およびY方向)のいずれにおいても穴611aの内縁から約30μm離間している。従って、突起196が穴611aに嵌る構造であっても、突起196および穴611aは、第1治具91および第2治具92を基準に第1バネ部材61とベース19とを位置決めすることを妨げることがない。また、突起196と穴611aの位置精度にかかわらず、第1治具91および第2治具92を基準に部材相互を高い位置精度で配置することができる。また、突起196と穴611aとの間が接着剤溜まり部となるので、接着剤が余計な所まで流出しないという利点がある。   Here, as shown in FIG. 7C, the protrusion 196 is separated from the inner edge of the hole 611a in any of two directions (X direction and Y direction) orthogonal to the optical axis direction. In any of the two directions (X direction and Y direction) orthogonal to the optical axis direction, the hole 611a is separated from the inner edge by about 30 μm. Therefore, even if the protrusion 196 is configured to fit into the hole 611a, the protrusion 196 and the hole 611a position the first spring member 61 and the base 19 with reference to the first jig 91 and the second jig 92. There is no hindrance. In addition, regardless of the positional accuracy of the protrusion 196 and the hole 611a, the members can be arranged with high positional accuracy based on the first jig 91 and the second jig 92. In addition, since the space between the protrusion 196 and the hole 611a is an adhesive reservoir, there is an advantage that the adhesive does not flow out to an extra portion.

また、本形態では、スリーブ30の辺352において互いに離間する2つの凸部307の先端面307aを基準面として利用する一方、ベース19の辺195bにおいて互いに離間する2つの凸部197の先端面197aを基準面として利用している。従って、辺352、195bの全体を精度よく形成しなくても、3つの凸部の先端面(凸部307の先端面307aおよび端部309の先端面309a)、および3つの凸部の先端面(凸部197の先端面197aおよび端部199の先端面199a)さえ、精度よく形成すれば、部材相互の相対位置精度を高めることができる。   In this embodiment, the tip surfaces 307a of the two convex portions 307 that are separated from each other on the side 352 of the sleeve 30 are used as the reference surface, while the tip surfaces 197a of the two convex portions 197 that are separated from each other on the side 195b of the base 19 are used. Is used as a reference plane. Therefore, even if the entire sides 352 and 195b are not accurately formed, the tip surfaces of the three convex portions (the tip surface 307a of the convex portion 307 and the tip surface 309a of the end portion 309) and the tip surfaces of the three convex portions If only the tip surface 197a of the convex portion 197 and the tip surface 199a of the end portion 199 are formed with high accuracy, the relative positional accuracy between members can be increased.

なお、第1部材側基準面としては、スリーブ30の円筒部31の内周を利用してもよく、第2部材側基準面としては、ベース19の円形の開口部190の内周を利用してもよい。かかる構成によれば、レンズ孔や撮像素子等の光学素子が配置される孔を基準に位置決めすることができるので、特別な基準面を別途、設ける必要がない。また、レンズ孔や撮像素子等の光学素子が配置される孔を基準に位置決めすることができるので、光軸を適正に設定することができる。   The inner periphery of the cylindrical portion 31 of the sleeve 30 may be used as the first member side reference surface, and the inner periphery of the circular opening 190 of the base 19 is used as the second member side reference surface. May be. According to such a configuration, since it is possible to position with reference to a hole in which an optical element such as a lens hole or an imaging element is arranged, it is not necessary to provide a special reference surface separately. In addition, the optical axis can be set appropriately because positioning can be performed with reference to a hole in which an optical element such as a lens hole or an imaging element is disposed.

(工程ST24の詳細説明)
図8は、本発明を適用したレンズ駆動装置1に用いたケース18、第2バネ部材62およびフレーム11の平面的構成を示す説明図であり、図8(a)、(b)、(c)は、ケース18、第2バネ部材62およびフレーム11等を重ねて配置したときの平面図、ケース18等の平面図、および第2バネ部材62等の平面図である。
(Detailed description of process ST24)
FIG. 8 is an explanatory view showing a planar configuration of the case 18, the second spring member 62 and the frame 11 used in the lens driving device 1 to which the present invention is applied, and FIGS. FIG. 4A is a plan view when the case 18, the second spring member 62, the frame 11 and the like are arranged in an overlapping manner, a plan view of the case 18 and the like, and a plan view of the second spring member 62 and the like.

図4を参照して説明した工程ST23においては、第2バネ部材62の移動体側連結部622を移動体3の光軸方向前側の端部に溶接等の方法で連結した後、第2バネ部材62の支持体側連結部621をケース18の前板部185に連結する。本形態では、バネ部材62の支持体側連結部621をケース18の前板部185に接続するにあたって、まず、位置決め工程において、図6に示すように、第2バネ部材61およびフレーム11を含む第1部材10cと、ケース18、ベース19および移動体3等を含む第2部材10dとを第1治具91および第2治具92を用いて光軸方向に交差する2方向(X方向およびY方向)で位置決めした後、連結工程において、図8(a)、(b)に示すように、バネ部材62の支持体側連結部621とケース18の前板部185とを連結する。ここで、第1治具91および第2治具92は、工程S21で用いた治具と基本的な構成が同一であり、第1部材保持部91eおよび第2部材保持部92eの構成が一部相違する。 In step ST23 described with reference to FIG. 4, the moving body side connecting portion 622 of the second spring member 62 is connected to the front end of the moving body 3 in the optical axis direction by a method such as welding, and then the second spring member. The support body side connecting portion 621 of 62 is connected to the front plate portion 185 of the case 18. In this embodiment, when connecting the support member side connecting portion 621 of the spring member 62 to the front plate portion 185 of the case 18, first, in the positioning step, as shown in FIG. 6, the second spring member 61 and the frame 11 including the frame 11 are included. A first member 10c and a second member 10d including the case 18, the base 19, the moving body 3 and the like are used in two directions (X direction and Y direction) intersecting the optical axis direction using the first jig 91 and the second jig 92. After positioning in the direction), in the connecting step, as shown in FIGS. 8A and 8B, the support-side connecting portion 621 of the spring member 62 and the front plate portion 185 of the case 18 are connected. Here, the first jig 91 and the second jig 92 have the same basic configuration as the jig used in step S21, and the first member holding portion 91e and the second member holding portion 92e have the same configuration. The parts are different.

また、位置決め工程を行うにあたっては、図8(a)、(c)に示すように、フレーム11の4つの辺111、112、113、114のうち、X方向の一方側X1の辺112(第1辺)、およびY方向の他方側Y2の辺114(第2辺)を第1部材10c側の第1部材側基準面とし、かかる第1部材側基準面を基準に、第1部材10cを第1治具91によって光軸方向に交差する2方向(X方向およびY方向)で位置決めした状態で保持する。   Further, in performing the positioning step, as shown in FIGS. 8A and 8C, among the four sides 111, 112, 113, 114 of the frame 11, the side 112 (the first side X1 in the X direction). 1 side) and the side 114 (second side) on the other side Y2 in the Y direction are defined as the first member side reference surface on the first member 10c side, and the first member 10c is defined based on the first member side reference surface. The first jig 91 is held in a state of being positioned in two directions (X direction and Y direction) intersecting the optical axis direction.

また、図8(b)に示すように、ケース18の4つの辺186a〜186dのち、X方向の一方側X1の辺186b(第1辺)、およびY方向の他方側Y2の辺186d(第2辺)を第2部材10d側の第2部材側基準面とし、かかる第2部材側基準面を基準に、第2部材10dを第2治具92によって光軸方向に交差する2方向(X方向およびY方向)で位置決めした状態で保持する。   8B, after the four sides 186a to 186d of the case 18, the side 186b (first side) on one side X1 in the X direction and the side 186d (first side) on the other side Y2 in the Y direction. The second member 10d side is defined as a second member side reference surface on the second member 10d side, and the second member 10d is intersected in the optical axis direction by the second jig 92 with reference to the second member side reference surface (X (Position and Y direction).

なお、本形態では、図4を参照して説明した工程ST22においてヨーク18とベース19とを連結する際、図5および図7等を参照して説明したベース19の辺195b、195dや、凸部197の先端面197aおよび端部199の先端面199aを基準に、ヨーク18とベース19とを位置合わせした後、ヨーク18とベース19とを連結してある。従って、ケース18を基準に、第2部材10dを第2治具92によって光軸方向に交差する2方向(X方向およびY方向)で位置決めすれば、ベース19を基準に、第2部材10dを第2治具92によって光軸方向に交差する2方向(X方向およびY方向)で位置決めした場合と同様な精度を得ることができる。   In this embodiment, when connecting the yoke 18 and the base 19 in the step ST22 described with reference to FIG. 4, the sides 195b and 195d of the base 19 described with reference to FIGS. The yoke 18 and the base 19 are aligned after the yoke 18 and the base 19 are aligned with respect to the tip surface 197a of the portion 197 and the tip surface 199a of the end 199. Therefore, if the second member 10d is positioned in two directions (X direction and Y direction) intersecting the optical axis direction by the second jig 92 with the case 18 as a reference, the second member 10d is determined with the base 19 as a reference. The same accuracy as when the second jig 92 is positioned in two directions (X direction and Y direction) intersecting the optical axis direction can be obtained.

また、第2部材側基準面としては、ケース18の辺186b、186dの他、ケース18の前板部185に形成されている円形の開口部180の内周を利用してもよい。また、ケース18に代えて、ベース19の辺195b、195dや、凸部197の先端面197aを第2部材側基準面として利用してもよい。また、ベース19の円形の開口部190や、スリーブ30の円筒部31の内周を第2部材側基準面として利用してもよい。   Further, as the second member side reference surface, in addition to the sides 186b and 186d of the case 18, the inner periphery of the circular opening 180 formed in the front plate portion 185 of the case 18 may be used. Further, instead of the case 18, the sides 195b and 195d of the base 19 and the front end surface 197a of the convex portion 197 may be used as the second member side reference surface. Further, the circular opening 190 of the base 19 and the inner periphery of the cylindrical portion 31 of the sleeve 30 may be used as the second member side reference surface.

次に、第1治具91と第2治具92とを重ね、第1部材10cと第2部材10dとを位置決めした後、レーザ溶接等の方法でバネ部材62の支持体側連結部621とケース18の前板部185とを連結する。   Next, after the first jig 91 and the second jig 92 are overlapped to position the first member 10c and the second member 10d, the support-side connecting portion 621 of the spring member 62 and the case are bonded by a method such as laser welding. 18 front plate portions 185 are connected.

かかる方法によれば、ケース18、ベース19や移動体3に形成されている第2部材側基準面を基準にして第2バネ部材62が配置されるので、第2バネ部材62の寸法精度が低くても、移動体3、ベース19、およびケース18の各々の間に高い位置精度を得ることができる。また、ケース18を介してベース19を基準に第2バネ部材62が配置されるので、部材の公差が累積されないので、移動体3、ベース19、およびケース18の各々の間に高い位置精度を得ることができる。   According to this method, since the second spring member 62 is disposed with reference to the second member side reference surface formed on the case 18, the base 19, and the movable body 3, the dimensional accuracy of the second spring member 62 is improved. Even if it is low, high positional accuracy can be obtained among the movable body 3, the base 19, and the case 18. In addition, since the second spring member 62 is arranged with respect to the base 19 via the case 18, the tolerances of the members are not accumulated, so that high positional accuracy is achieved between the movable body 3, the base 19, and the case 18. Can be obtained.

(他の工程ST11、ST14、ST22への適用例)
図6を参照して説明した方法は、工程ST11において、スリーブ30の光軸方向後側の面に第1バネ部材61を固着する場合に適用してもよい。より具体的には、第1バネ部材61を第1治具に保持する一方、スリーブ30を第2治具に保持し、第1治具および第2治具を基準に第1バネ部材61とスリーブ30とを位置決めし、連結してもよい。
(Application examples to other processes ST11, ST14, ST22)
The method described with reference to FIG. 6 may be applied when the first spring member 61 is fixed to the rear surface in the optical axis direction of the sleeve 30 in the step ST11. More specifically, the first spring member 61 is held by the first jig, while the sleeve 30 is held by the second jig, and the first spring member 61 and the first jig are used as a reference. The sleeve 30 may be positioned and connected.

また、図6を参照して説明した方法は、工程ST14において、第2バネ部材62とフレーム11とを連結する場合に適用してもよい。より具体的には、第2バネ部材62を第1治具に保持する一方、フレーム11を第2治具に保持し、第1治具および第2治具を基準に第2バネ部材62とフレーム11とを位置決めし、連結してもよい。   Further, the method described with reference to FIG. 6 may be applied when the second spring member 62 and the frame 11 are coupled in step ST14. More specifically, the second spring member 62 is held by the first jig, while the frame 11 is held by the second jig, and the second spring member 62 is based on the first jig and the second jig. The frame 11 may be positioned and connected.

さらに、図6を参照して説明した方法は、工程ST22において、ヨーク18とベース19とを連結する場合に適用してもよい。より具体的には、ヨーク18を第1治具に保持する一方、ベース19を第2治具に保持し、第1治具および第2治具を基準にヨーク18とベース19とを位置決めし、連結してもよい。   Furthermore, the method described with reference to FIG. 6 may be applied to the case where the yoke 18 and the base 19 are connected in step ST22. More specifically, the yoke 18 is held by the first jig, the base 19 is held by the second jig, and the yoke 18 and the base 19 are positioned with reference to the first jig and the second jig. , May be linked.

(本形態の主な効果)
以上説明したように、本形態では、支持体2にバネ部材(第1部材61および第2バネ部材62)を接続する際、バネ部材を含む第1部材10a、10cを第1治具91によって光軸方向に交差する方向で位置決めした状態で保持する一方、支持体2を含む第2部材10b、10dを第2治具92によって光軸方向に交差する方向で位置決めした状態で保持し、第1治具91および第2治具92を基準に第1部材10a、10cと第2部材10b、10dとを位置決めする。このため、第1部材10a、10cの第1部材側基準面、および第2部材10b、10dの第2部材側基準面を精度よく形成しておけば、第1部材10a、10cと第2部材10b、10dとを精度よく連結することができる。また、第1治具91および第2治具92を基準に位置決めするので、部材の基準面を直接視認できないような場合でも、第1部材10a、10cと第2部材10b、10dとを精度よく連結することができる。それ故、バネ部材(第1部材61および第2バネ部材62)を支持体2に精度よく接続することができるので、移動体3、ベース19、およびケース18の各々の間に高い位置精度を得ることができる。
(Main effects of this form)
As described above, in this embodiment, when the spring members (the first member 61 and the second spring member 62) are connected to the support 2, the first members 91a and 10c including the spring members are moved by the first jig 91. The second member 10b, 10d including the support 2 is held in a state of being positioned in a direction crossing the optical axis direction, while the second member 10b, 10d including the support 2 is held in a state of being positioned in a direction crossing the optical axis direction. The first members 10a and 10c and the second members 10b and 10d are positioned with reference to the first jig 91 and the second jig 92. For this reason, if the 1st member side reference plane of the 1st members 10a and 10c and the 2nd member side reference plane of the 2nd members 10b and 10d are formed accurately, the 1st members 10a and 10c and the 2nd member 10b and 10d can be accurately connected. In addition, since the first jig 91 and the second jig 92 are positioned as a reference, the first members 10a and 10c and the second members 10b and 10d can be accurately connected even when the reference surface of the member cannot be directly recognized. Can be linked. Therefore, since the spring members (the first member 61 and the second spring member 62) can be connected to the support 2 with high accuracy, high positional accuracy can be achieved between the movable body 3, the base 19, and the case 18. Can be obtained.

(他の実施の形態)
上記実施の形態では、ヨーク18等が角筒形状であったが、ヨーク18が円筒形状であるレンズ駆動装置1に本発明を適用してもよい。また、上記実施の形態では、ヨーク18は磁性体からなるケースとして機能していたが、移動体3が非磁性のケースで覆われている場合でも、本発明を適用してもよい。
(Other embodiments)
In the above embodiment, the yoke 18 and the like have a rectangular tube shape, but the present invention may be applied to the lens driving device 1 in which the yoke 18 has a cylindrical shape. In the above embodiment, the yoke 18 functions as a case made of a magnetic material. However, the present invention may be applied even when the moving body 3 is covered with a nonmagnetic case.

1・・レンズ駆動装置
2・・支持体
3・・移動体
4・・レンズ
5・・磁気駆動機構
10a、10c・・第1部材
10b、10d・・第2部材
18・・ヨーク(ケース)
19・・ベース
30・・スリーブ
51・・コイル
61・・第1バネ部材
62・・第2バネ部材
91・・第1治具
92・・第2治具
196・・突起
197a、307a・・凸部の先端面
199a、309a・・端部の先端面(凸部の先端面)
DESCRIPTION OF SYMBOLS 1 ... Lens drive device 2 ... Support body 3 ... Moving body 4 ... Lens 5 ... Magnetic drive mechanism 10a, 10c ... First member 10b, 10d ... Second member 18 ... Yoke (case)
19, base 30, sleeve 51, coil 61, first spring member 62, second spring member 91, first jig 92, second jig 196, projections 197a, 307a, convex Tip surface 199a, 309a .. tip end surface (tip tip surface)

Claims (6)

支持体と、前記支持体の内側に配置され、レンズが搭載される移動体と、前記支持体と前記移動体とに接続されたバネ部材と、前記支持体と前記移動体との間に配置され、前記移動体を前記支持体に対してレンズ光軸方向に磁気駆動する磁気駆動機構と、を有するレンズ駆動装置の製造方法において、
前記支持体は、前記移動体に対してレンズ光軸方向後側に配置されるベースと、該ベースに対してレンズ光軸方向前側に配置されるケースと、を含み、
前記バネ部材は、前記ベースと前記移動体とに接続された第1バネ部材と、前記ケースと前記移動体とに接続された第2バネ部材と、を含み、
前記ベースには、前記第1バネ部材に向けて突出した突起が設けられ、
前記第1バネ部材には、前記突起が嵌る穴が設けられ、
前記移動体と前記移動体に接続された前記第1バネ部材を含む第1部材と、前記ベースを含む第2部材とを位置決めするにあたっては、
前記第1部材を位置決めして保持する第1部材保持部が形成されているとともに、前記第1部材保持部に所定の関係を成す位置に2本のピンが形成された第1治具、および、前記第2部材を位置決めして保持する第2部材保持部が形成されているとともに、前記第2部材保持部に所定の関係を成す位置に前記2本のピンの一方が嵌まる溝と他方のピンが嵌まる穴が形成された第2治具によって、前記移動体に形成されている第1部材側基準面を基準にして前記第1部材を前記第1治具の前記第1部材保持部によってレンズ光軸に交差する方向で位置決めした状態で保持する一方、前記ベースに形成されている第2部材側基準面を基準にして前記第2部材を前記第2治具の前記第2部材保持部によってレンズ光軸に交差する方向で位置決めした状態で保持した状態で、前記第1治具および前記第2治具を基準に前記第1バネ部材と前記ベースとをレンズ光軸に交差する方向で位置決めする位置決め工程を行い
前記第1バネ部材を前記ベースに接続するにあたっては、
前記2本のピンが前記一方のピンが嵌まる前記溝および前記他方のピンが嵌まる前記穴に各々嵌るように前記第1治具と前記第2治具を重ねた際、前記突起がレンズ光軸方向に直交する2方向のいずれにおいても前記突起が嵌まる前記穴の内縁から離間しており、前記突起の形成領域を含む領域に設けられた接着剤により接着されて、前記第1バネ部材と前記ベースとを連結する連結工程と、
を行うことを特徴とするレンズ駆動装置の製造方法。
A support body, a movable body disposed inside the support body, on which a lens is mounted, a spring member connected to the support body and the movable body, and disposed between the support body and the movable body And a magnetic drive mechanism that magnetically drives the moving body with respect to the support in the lens optical axis direction.
The support includes a base disposed on the rear side in the lens optical axis direction with respect to the movable body, and a case disposed on the front side in the lens optical axis direction with respect to the base.
The spring member includes a first spring member connected to the base and the movable body, and a second spring member connected to the case and the movable body,
The base is provided with a protrusion protruding toward the first spring member,
The first spring member is provided with a hole into which the protrusion is fitted,
The movable body and the first member including the connected first spring member to the movable body, when Ru positioning knife and a second member including the base,
A first jig in which a first member holding portion for positioning and holding the first member is formed, and two pins are formed at a position forming a predetermined relationship with the first member holding portion; A second member holding portion that positions and holds the second member, and a groove in which one of the two pins fits in a position that forms a predetermined relationship with the second member holding portion. the second jig is full core pins of fit is formed, the movable body in the first member relative to the first member side reference surface formed of said first jig said first member holding while held in a state of being positioned in a direction intersecting the optical axis of the lens by parts, the second member of the said second member to the second member side reference surface formed on the base on the basis the second jig It has been positioned in a direction intersecting the optical axis of the lens by the holding portion While holding at state performs positioning step of positioning the first jig and the second jig in a direction intersecting with said first spring member and the base reference to the lens optical axis,
In connecting the first spring member to the base,
When the first jig and the second jig are overlapped so that the two pins fit into the groove into which the one pin fits and the hole into which the other pin fits, the protrusions become lenses. The first spring is separated from the inner edge of the hole into which the protrusion fits in any one of two directions orthogonal to the optical axis direction, and is adhered by an adhesive provided in an area including the formation area of the protrusion. A connecting step of connecting the member and the base ;
A method of manufacturing a lens driving device.
前記第1部材側基準面、および前記第2部材側基準面のうちの少なくとも一方の基準面は、前記第1部材または前記第2部材においてレンズ光軸方向からみたとき略矩形状を有する矩形部分の第1辺、および当該矩形部分で前記第1辺に交差する第2辺に形成されていることを特徴とする請求項1に記載のレンズ駆動装置の製造方法。 At least one of the first member side reference surface and the second member side reference surface is a rectangular portion having a substantially rectangular shape when viewed from the lens optical axis direction in the first member or the second member. 2. The method for manufacturing a lens driving device according to claim 1, wherein the first side and the second side that intersects the first side at the rectangular portion are formed . 前記一方の基準面には、前記第1辺において当該第1辺の延在方向で互いに離間する2つの凸部の先端面からなる基準面、または前記第2辺において当該第2辺の延在方向で互いに離間する2つの凸部の先端面からなる基準面が含まれていることを特徴とする請求項2に記載のレンズ駆動装置の製造方法。 The one reference plane includes a reference plane formed by tip surfaces of two convex portions that are separated from each other in the extending direction of the first side on the first side, or an extension of the second side on the second side. The method for manufacturing a lens driving device according to claim 2, comprising a reference surface including tip surfaces of two convex portions that are separated from each other in a direction . 前記一方の基準面には、前記第1辺および前記第2辺のうち、一方の辺において当該辺の延在方向で互いに離間する前記2つの凸部の先端面からなる基準面と、他方の辺に形成された1つの凸部の先端面からなる基準面と、が含まれていることを特徴とする請求項3に記載のレンズ駆動装置の製造方法。 The one reference surface includes a reference surface composed of tip surfaces of the two convex portions that are separated from each other in the extending direction of the one side out of the first side and the second side, and the other side. The method for manufacturing a lens driving device according to claim 3, further comprising: a reference surface formed of a tip surface of one convex portion formed on the side . 前記第1部材側基準面、および前記第2部材側基準面のうちの少なくとも一方の基準面は、前記第1部材または前記第2部材においてレンズ光軸方向からみたとき円形状の基準面であることを特徴とする請求項1に記載のレンズ駆動装置の製造方法。 At least one of the first member-side reference surface and the second member-side reference surface is a circular reference surface when viewed from the lens optical axis direction in the first member or the second member. The method of manufacturing a lens driving device according to claim 1 . 前記円形状の基準面は、前記移動体において前記レンズが配置されるレンズ孔、または前記支持体において撮像素子が保持される撮像素子孔であることを特徴とする請求項に記載のレンズ駆動装置の製造方法。 6. The lens drive according to claim 5 , wherein the circular reference surface is a lens hole in which the lens is disposed in the movable body or an image sensor hole in which the image sensor is held in the support. Device manufacturing method.
JP2012104247A 2012-04-28 2012-04-28 Lens driving device manufacturing method and lens driving device Expired - Fee Related JP5937416B2 (en)

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