JP2010028698A - Method of manufacturing pedestal for camera module - Google Patents

Method of manufacturing pedestal for camera module Download PDF

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JP2010028698A
JP2010028698A JP2008190523A JP2008190523A JP2010028698A JP 2010028698 A JP2010028698 A JP 2010028698A JP 2008190523 A JP2008190523 A JP 2008190523A JP 2008190523 A JP2008190523 A JP 2008190523A JP 2010028698 A JP2010028698 A JP 2010028698A
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lens unit
pedestal
mold
unit support
camera module
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JP4766435B2 (en
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Nobuyuki Mano
伸之 真野
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SMK Corp
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SMK Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a pedestal for camera module by which the automatic assembly accuracy of the pedestal to a substrate can be enhanced without being affected by the fitting accuracy of a fixed die and a movable die for forming the pedestal. <P>SOLUTION: When molding, by the fixed die and the movable die, the pedestal 20 for the camera module integrally having a base part 20a in a hollow ring shape, whose lower end face is fixed to the upper surface of the substrate 22 where an imaging element 23 is disposed, a cylindrical lens unit support part 20b which is integrally formed on the base part and inside which a lens unit 21 is to be fitted, and an intermediate shelf part 25 formed in an inward flange shape at a bottom part inside the lens unit support part 20b and provided with a window hole for transmission on the center part, the inner peripheral surface of the lens unit support part 20b at the part configuring the pedestal and an edge part for image recognition configuring a part of the inner peripheral edge part of the window hole visible from the side of the base part 20a are formed by the same fixed or movable die. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、携帯電話機や携帯端末機などに用いられるカメラモジュールにおいて、撮像素子が固定された基板に対し、その撮像素子に対して所定の位置関係を持たせて取り付けるための台座を形成するカメラモジュール用台座の製造方法に関する。   The present invention relates to a camera module used in a mobile phone, a portable terminal, or the like, and a camera that forms a pedestal for attaching to a substrate on which an image sensor is fixed with a predetermined positional relationship with the image sensor. The present invention relates to a method for manufacturing a module base.

従来のカメラモジュールは、例えば図８、図９に示すように、撮像素子１が配設された回路基板（以下単に基板という。）２上に台座３が接着剤を使用して固着され、その台座３にレンズユニット４が保持されている。   For example, as shown in FIGS. 8 and 9, a conventional camera module has a pedestal 3 fixed on a circuit board (hereinafter simply referred to as a board) 2 on which an image pickup device 1 is disposed using an adhesive. The lens unit 4 is held on the pedestal 3.

台座３は四角リング状をした基台部３ａの上に円筒状をしたレンズユニット支持部３ｂが一体に形成され、レンズユニット支持部３ｂの内底部には、内向きのフランジ状に中間棚部３ｃが形成され、その中間棚部３ｃの中央部分に、撮像光が透過する透光用窓孔３ｄが開口されている。   The pedestal 3 is integrally formed with a cylindrical lens unit support portion 3b on a square ring-shaped base portion 3a, and an intermediate shelf portion is formed in an inward flange shape on the inner bottom portion of the lens unit support portion 3b. 3c is formed, and a translucent window hole 3d through which the imaging light is transmitted is opened at a central portion of the intermediate shelf portion 3c.

レンズユニット４は、円筒状をなし、外周に雄ネジが形成されたバレル４ａと、該バレル４ａ内に組み込まれたレンズ群４ｂとから構成されており、バレル４ａを台座のレンズユニット支持部３ｂの内面の雌ネジに螺合させることによって台座３に保持させるようにしている（例えば特許文献１参照）。   The lens unit 4 is formed of a barrel 4a having a cylindrical shape and a male screw formed on the outer periphery thereof, and a lens group 4b incorporated in the barrel 4a. The lens unit support portion 3b of the pedestal is used as the barrel 4a. It is made to hold | maintain to the base 3 by screwing in the internal thread of the inner surface (for example, refer patent document 1).

この種のカメラモジュールにおける台座は、一般に合成樹脂によるモールド成型されたものが使用されており、図１０に示すように、固定金型１０と可動金型１１との間に形成された樹脂成型空間１２内に溶融させた合成樹脂材を注入することによって成型するようにしている。   The pedestal in this type of camera module is generally molded by synthetic resin. As shown in FIG. 10, a resin molding space formed between the fixed mold 10 and the movable mold 11 is used. Molding is performed by injecting a melted synthetic resin material into the inside 12.

このモールド成型に際し、特にレンズユニット４を台座３に対して螺合させるようにしているものにあっては、型抜きの都合から、金型の一方、例えば固定金型１０によってレンズユニット支持部３ｂの内面のネジ部及び中間棚部３ｃの上面を成型させるようにしている。   At the time of molding, particularly in the case where the lens unit 4 is screwed to the pedestal 3, the lens unit support portion 3 b is fixed by one of the molds, for example, the fixed mold 10 for convenience of mold removal. The inner thread portion and the upper surface of the intermediate shelf portion 3c are molded.

また、透光用窓孔３ｄは、撮像光が透過される部分であるため、反射による光の撹乱を防止するため、撮像素子側即ち基台部３ａ内側が拡開したテーパ状に形成される必要があるため、これと方抜きの都合から、金型の他方、例えば可動金型１１によって、中間棚部３ｃの下面、該中間棚部に開口させた透光用窓孔３ｄの内周面を形成させるようにしている。   Further, the translucent window hole 3d is a portion through which the imaging light is transmitted. Therefore, in order to prevent disturbance of light due to reflection, the translucent window hole 3d is formed in a tapered shape in which the imaging element side, that is, the inside of the base portion 3a is expanded. Because of this, for the sake of convenience and removal, the other side of the mold, for example, the movable mold 11, the lower surface of the intermediate shelf portion 3 c and the inner peripheral surface of the translucent window hole 3 d opened in the intermediate shelf portion are used. To form.

また、基板２に対する台座３の組み立ては、一般に使用されている電子部品の組み立てと同様に、画像認識を利用したロボットが使用されている。この組立方法は、図１１に示すように、台座３が置かれている搬送台１５上から掴み機１６によって台座２を掴み上げ、これを別の搬送台１７上の基板２上に移動させる途中において、下側からカメラ１８によって台座３の画像情報を取り込み、この画像情報を元にして掴み機１６を自動制御させ、基板２に対する台座３の向き及び水平方向の位置を合わせ、台座３を基板２上に押し付け、予め塗布してある接着剤によって両者を固着させるようにしている（例えば特許文献２）。
特開２００６−３３０１１６号公報 特開平５−１５０８３５号公報 In addition, assembling the base 3 with respect to the substrate 2 uses a robot utilizing image recognition, as in the case of assembling commonly used electronic components. This method of assembly, as shown in Figure 11, raised grip the base 2 by gripping device 16 over the transport platform 15 which seat 3 is placed, to move this onto the substrate 2 on another carrier table 17 In the middle, the image information of the pedestal 3 is captured from the lower side by the camera 18, the gripping machine 16 is automatically controlled based on this image information, the orientation of the pedestal 3 with respect to the substrate 2 and the horizontal position are matched, They are pressed onto the substrate 2 and fixed together with an adhesive that has been applied in advance (for example, Patent Document 2).
JP 2006-330116 A Japanese Patent Laid-Open No. 5-150835

上述した従来の方法においては、基板２に対する台座３を固着する自動組立工程において、カメラによって取り込まれる画像情報の指標となる位置と、台座３に組み込まれたレンズユニット４の光軸との相対関係に誤差があると、基板２上の撮像素子１とレンズユニット４との相対関係に取り付け誤差が発生し、解像度が低下する。   In the conventional method described above, the relative relationship between the position serving as an index of image information captured by the camera and the optical axis of the lens unit 4 incorporated in the pedestal 3 in the automatic assembly process for fixing the pedestal 3 to the substrate 2. If there is an error, an attachment error occurs in the relative relationship between the image pickup device 1 and the lens unit 4 on the substrate 2, and the resolution decreases.

上述した従来の台座製造金型では、レンズユニット４の光軸を決定するレンズユニット支持部３ｂと、画像情報を取り込む指標となる台座３の透光窓孔３ｄとは固定金型と可動金型とによって別々に形成されているため、両金型の嵌合状態の精度が、レンズユニットの光軸に対する撮像阻止の取り付け精度に大きく反映することとなる。   In the above-described conventional pedestal manufacturing mold, the lens unit support 3b that determines the optical axis of the lens unit 4 and the translucent window hole 3d of the pedestal 3 that serves as an index for capturing image information are a fixed mold and a movable mold. Therefore, the accuracy of the fitting state of both molds greatly reflects the accuracy of mounting the imaging unit on the optical axis of the lens unit.

しかし、モールド成型用固定金型と可動金型の機械的嵌合の精度を上げることには限界があり、近年のカメラモジュールの小型化の要請に追随させることは困難であるという問題があった。   However, there is a limit to increasing the accuracy of mechanical fitting between the mold for fixed molding and the movable mold, and there is a problem that it is difficult to follow the recent demand for miniaturization of camera modules. .

本発明は、このような従来の問題に鑑み、基板に対する台座の自動組み立て精度を、台座を形成するための固定金型と可動金型の嵌合精度に影響されることなく高めることを可能としたカメラモジュール用台座の製造方法の提供を目的としてなされたものである。   In view of such a conventional problem, the present invention makes it possible to increase the automatic assembly accuracy of a pedestal with respect to a substrate without being affected by the fitting accuracy between a fixed mold and a movable mold for forming the pedestal. The present invention was made for the purpose of providing a method for manufacturing a camera module base.

上述した従来の問題を解決し、所期の目的を達成するための請求項１に記載の発明の特徴は、撮像素子が配設された基板の上面に下端面が固定される中空リング状の基台部と、該基台部上に一体形成され、内部にレンズユニットが嵌合される筒状をしたレンズユニット支持部と、前記レンズユニット支持部内の底部に内向きフランジ状に形成され、中央部分に透光用窓孔を有する中間棚部とを一体に有するカメラモジュール用台座を、固定金型と可動金型とをもってモールド成型するカメラモジュール用台座の製造方法において、該台座を構成する部分の少なくとも前記レンズユニット支持部内周面と、前記基台部側から視認できる窓孔の内周縁部の一部を構成する画像認識用エッジ部とを、前記固定または可動何れかの同一金型によって形成させることにある。   The feature of the invention described in claim 1 for solving the above-described conventional problems and achieving the intended object is a hollow ring-like shape in which the lower end surface is fixed to the upper surface of the substrate on which the image sensor is disposed. A base unit, a cylindrical lens unit support unit integrally formed on the base unit, into which a lens unit is fitted, and an inward flange-like shape at the bottom of the lens unit support unit; In a manufacturing method of a camera module pedestal in which a camera module pedestal integrally having an intermediate shelf portion having a light transmitting window hole in a central portion is molded with a fixed mold and a movable mold, the pedestal is configured. At least the lens unit support part inner peripheral surface of the part and the image recognition edge part constituting a part of the inner peripheral part of the window hole visible from the base part side, either the fixed or movable same mold By shape There to be.

請求項２に記載の発明の特徴は、請求項１の構成に加え、前記固定金型に、前記台座の前記レンズユニット支持部の内面を形成するレンズユニット支持部内周形成面及び前記中間棚部の上面を形成する中間棚部上側形成面を備えるとともに該中間棚部上側形成面に、その中央部分に下向き盤状凸部を一体に備え、前記可動金型に、前記基台部の内周面を形成する基台部内周形成面と、前記中間棚部の下側面を形成する中間棚部下側形成面とを備えるとともに、該中間棚部下側形成面の中央部分に、前記透光用窓孔の内周面を形成する上向き盤状凸部を備え、該上向き盤状凸部の上面外周縁より内側に、前記上向き盤状凸部の下面外周縁の一部が位置される形状とすることによって、前記両盤状凸部を接合させた際に、可動金型によって形成される四角形状の透光用窓孔の内周縁の一部に、固定金型によって前記画像認識用エッジが形成されるようにしたことにある。   According to a second aspect of the present invention, in addition to the configuration of the first aspect, a lens unit support portion inner periphery forming surface and an intermediate shelf portion that form an inner surface of the lens unit support portion of the base on the fixed mold. The upper side of the intermediate shelf part forming the upper surface of the intermediate shelf part and the upper side of the intermediate shelf part is integrally provided with a downward plate-like convex part at the center thereof, and the movable mold has an inner periphery of the base part. A base part inner periphery forming surface that forms a surface and an intermediate shelf lower side forming surface that forms a lower side surface of the intermediate shelf, and the translucent window at a central portion of the intermediate shelf lower side formation surface An upward plate-like convex portion that forms the inner peripheral surface of the hole is provided, and a part of the outer peripheral edge of the lower surface of the upward plate-like convex portion is positioned inside the upper peripheral edge of the upward plate-like convex portion. Thus, when the both disk-shaped convex portions are joined, they are formed by a movable mold. That a part of the inner peripheral edge of rectangular permeable light windows, lies in the so said image recognition edge is formed by the fixed mold.

請求項３に記載の発明の特徴は、前記請求項２の構成に加え、前記下向き盤状凸部は、外周面を上側が拡開したテーパ状をした円形状に形成され、前記上向き盤状凸部は、外周面を下側が拡開したテーパ状の４週面を有する四角形状に形成され、前記上向き盤状凸部の上面の４隅部が、前記下向き盤状凸部の下面外周面より外側に位置される形状とすることによって、可動金型によって形成される四角形状の透光用窓孔の４隅部を角取りした状態に、前記固定金型による画像認識用エッジが形成されるようにしたことにある。   According to a third aspect of the present invention, in addition to the configuration of the second aspect, the downward disk-shaped convex portion is formed in a circular shape having a tapered shape with an outer peripheral surface widened upward, and the upward disk-shaped protrusion is formed. The convex portion is formed in a quadrangular shape having a tapered four-week surface with the outer peripheral surface expanded on the lower side, and the four corners of the upper surface of the upward disc-like convex portion are the lower outer peripheral surface of the downward disc-like convex portion. By adopting a shape positioned on the outer side, the edge for image recognition by the fixed mold is formed in a state where the four corners of the rectangular translucent window hole formed by the movable mold are chamfered. There is in doing so.

上述の如く、本発明に係るカメラモジュール用台座の製造方法は、台座を構成する部分の少なくともレンズユニット支持部内周面と、基台部側から視認できる窓孔の内周縁部の一部を構成する画像認識用エッジ部とを、固定または可動何れかの同一金型によって形成させることにより、互いに接合される固定金型と可動金型との接合に関する機械的な誤差が生じても、これに影響されることなく、レンズユニット支持部の内周面と画像認識用エッジとは、常に一定の相対位置関係にあることとなり、基板に対して台座を下側から透視するカメラによる画像情報を利用して自動組立てする際の精度が安定したものとなる。   As described above, the method for manufacturing a camera module pedestal according to the present invention comprises at least the lens unit support part inner peripheral surface of the part constituting the pedestal and a part of the inner peripheral part of the window hole visible from the base part side. Even if there is a mechanical error related to the joining between the fixed mold and the movable mold that are joined to each other by forming the image recognition edge portion with the same mold that is either fixed or movable, Without being affected, the inner peripheral surface of the lens unit support part and the edge for image recognition are always in a fixed relative positional relationship, and image information from a camera that is seen through the pedestal from below is used for the substrate. As a result, the accuracy during automatic assembly becomes stable.

また、前記固定金型に、前記台座の前記レンズユニット支持部の内面を形成するレンズユニット支持部内周形成面及び前記中間棚部の上面を形成する中間棚部上側形成面を備えるとともに該中間棚部上側形成面に、その中央部分に下向き盤状凸部を一体に備え、前記可動金型に、前記基台部の内周面を形成する基台部内周形成面と、前記中間棚部の下側面を形成する中間棚部下側形成面とを備えるとともに、該中間棚部下側形成面の中央部分に、前記透光用窓孔の内周面を形成する上向き盤状凸部を備え、該上向き盤状凸部の上面外周縁より内側に、前記下向き盤状凸部の下面外周縁の一部が位置される形状とすることによって、前記両盤状凸部を接合させた際に、可動金型によって形成される四角形状の透光用窓孔の内周縁の一部に、固定金型によって前記画像認識用エッジが形成されることとなり、透光用窓孔の周縁の適宜の位置に、レンズユニット支持部を形成する可動金型による画像認識用エッジが容易に形成できる。   In addition, the fixed mold is provided with a lens unit support portion inner periphery forming surface that forms the inner surface of the lens unit support portion of the pedestal and an intermediate shelf upper side forming surface that forms the upper surface of the intermediate shelf portion, and the intermediate shelf. The upper part forming surface is integrally provided with a downward plate-like convex part at the center part thereof, and the movable mold has a base part inner peripheral forming surface that forms the inner peripheral surface of the base part, and the intermediate shelf part. An intermediate shelf lower forming surface that forms a lower side surface, and an upward disk-shaped convex portion that forms an inner peripheral surface of the light transmitting window hole in a central portion of the intermediate shelf lower formation surface, It is movable when the both disk-shaped convex parts are joined by forming a part of the outer peripheral edge of the lower surface of the downward disk-shaped convex part inside the upper peripheral edge of the upward disk-shaped convex part. Fixed to a part of the inner peripheral edge of the rectangular transparent window hole formed by the mold Will be the image recognition edges by the type is formed, at an appropriate position of the periphery of the permeable light windows, the image recognizing edge by the movable mold to form a lens unit supporting portion can be easily formed.

更に、前記下向き盤状凸部は、外周面を上側が拡開したテーパ状をした円形状に形成され、前記上向き盤状凸部は、外周面を下側が拡開したテーパ状の４週面を有する四角形状に形成され、前記上向き盤状凸部の上面の４隅部が、前記下向き盤状凸部の下面外周面より外側に位置される形状し、可動金型によって形成される四角形状の透光用窓孔の４隅部を角取りした状態に、前記固定金型による画像認識用エッジが形成されるようにしたことにより、シンプルな形状の固定金型及び可動金型によって、レンズユニット支持部と画像認識用エッジとを一方側の金型にて形成することができる。   Further, the downward disk-shaped convex part is formed in a circular shape having a taper shape whose outer peripheral surface is expanded on the upper side, and the upward disk-shaped convex part is a tapered four-week surface whose outer surface is expanded on the lower side. The four corners of the upper surface of the upward disk-shaped convex part are located outside the outer peripheral surface of the lower surface of the downward disk-shaped convex part, and the rectangular shape is formed by a movable mold. The edge for image recognition by the fixed mold is formed in the state in which the four corners of the light transmitting window hole are rounded, so that the lens can be obtained by a fixed mold and a movable mold having a simple shape. The unit support part and the image recognition edge can be formed by a mold on one side.

次に、本発明に係るカメラモジュール用台座の製造方法を実施するための最良の形態を、図１〜図７に示す実施例を参照して詳細に説明する。図１は本発明に係る製造方法によって製造された台座を使用したカメラモジュールを示しており、図において符号２０は台座である。この台座２０は、四角リング状をした基台部２０ａと、その上に連続した配置の円筒状をしたレンズユニット支持部２０ｂとから構成されている。   Next, the best mode for carrying out the method for manufacturing a camera module base according to the present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a camera module using a pedestal manufactured by the manufacturing method according to the present invention. In the figure, reference numeral 20 denotes a pedestal. The pedestal 20 includes a base portion 20a having a square ring shape, and a cylindrical lens unit support portion 20b continuously arranged thereon.

レンズユニット支持部２０b内にはレンズユニット２１が装着されている。レンズユニット２１は円筒状をしたバレル２１ａ内に複数枚のレンズ２１ｂが装着されており、外周面には雄ネジが形成され、レンズユニット支持部２０ｂの内周面に形成されている雌ネジに螺合され、所定の位置高さ位置に固定されている。   A lens unit 21 is mounted in the lens unit support portion 20b. The lens unit 21 has a plurality of lenses 21b mounted in a cylindrical barrel 21a. A male screw is formed on the outer peripheral surface, and a female screw formed on the inner peripheral surface of the lens unit support portion 20b. It is screwed and fixed at a predetermined position height position.

台座２０は、基台部２０aの下端面が回路基板（以下単に基板という）２２の上面に接着剤をもって固着されている。基板２２の上面には回路パターン（図示せず）に接続させて撮像素子２３が固着されている。この撮像素子２３は、その中心を前述したレンズユニット２１の光軸に合わせて設置されている。   In the pedestal 20, the lower end surface of the base portion 20 a is fixed to the upper surface of a circuit board (hereinafter simply referred to as a board) 22 with an adhesive. An image sensor 23 is fixed to the upper surface of the substrate 22 so as to be connected to a circuit pattern (not shown). The image sensor 23 is installed with its center aligned with the optical axis of the lens unit 21 described above.

台座２０内のレンズユニット支持部２０ｂの内底部には、内向きのフランジ状に中間棚部２５が一体に形成されている。     An intermediate shelf 25 is integrally formed on the inner bottom portion of the lens unit support portion 20b in the pedestal 20 in an inward flange shape.

中間棚部２５の上面、即ちレンズユニット２１側の面には、レンズユニット支持部２０ｂ内周面の軸心を中心にした円形の凹部２６が形成されており、その凹部２６の周縁内面２７が上側、即ちレンズユニット２１側が拡開されたテーパ面となっている。   On the upper surface of the intermediate shelf portion 25, that is, the surface on the lens unit 21 side, a circular concave portion 26 is formed around the axis of the inner peripheral surface of the lens unit support portion 20b. The upper side, that is, the lens unit 21 side is an enlarged tapered surface.

一方中間棚部２５には、略四角形状をした透光用窓孔２８が形成されている。この窓孔２８は、四角形状を構成する各辺部２８ａ〜２８ｄと、その四角形状の四隅部の角を僅かに角取りした形状の４箇所の画像認識用エッジ部２７ａとから構成されている。   On the other hand, a light transmission window hole 28 having a substantially square shape is formed in the intermediate shelf 25. The window hole 28 is composed of side portions 28a to 28d that form a quadrilateral shape, and four image recognition edge portions 27a that are formed by slightly rounding the corners of the four corner portions of the quadrangular shape. .

上記四角形状の各辺部２８ａ〜２８ｄは、その内面が下側、即ち撮像素子２３側を拡開させたテーパ状に形成されているとともに、各画像認識用エッジ部２７ａは、中間棚部上面側の前記凹部２６の内周面２７によって構成されており、その内面が上側、即ちレンズユニット２１側を拡開させたテーパ状に形成されている。   Each of the rectangular side portions 28a to 28d is formed in a tapered shape whose inner surface is lower, that is, the image sensor 23 side is expanded, and each image recognition edge portion 27a is formed on the upper surface of the intermediate shelf portion. An inner peripheral surface 27 of the concave portion 26 on the side is formed, and the inner surface thereof is formed in a tapered shape in which the upper side, that is, the lens unit 21 side is expanded.

次に、このように構成される台座２０のモールド成型について説明する。この成型には固定金型３０と、これに嵌め合わせる可動金型３１とを使用し、両金型３０，３１を組み合わせることによって構成される中空型部３２内に加熱溶融させた合成樹脂材を注入することによって成型する。   Next, molding of the pedestal 20 configured as described above will be described. For this molding, a fixed mold 30 and a movable mold 31 fitted to the fixed mold 30 are used, and a synthetic resin material heated and melted in a hollow mold portion 32 formed by combining both molds 30 and 31 is used. Mold by pouring.

固定金型３０には、円筒状をした内向きのレンズユニット支持部外周形成面３０ａ、円形リング状をした下向きの上端形成面３０ｂ、雄ネジ状をした外向きのレンズユニット支持部内周形成面３０ｃ、円形リング状をした下向きの中間棚部上側形成面３０ｄを有している。   The fixed mold 30 includes a cylindrical inward lens unit support portion outer periphery forming surface 30a, a circular ring-shaped downward upper end forming surface 30b, and an external threaded lens unit support portion inner periphery forming surface. 30c has a circular ring-shaped downward intermediate shelf upper side forming surface 30d.

可動金型３１には、各筒状をした内向きの基台部外周形成面３１ａ、円形リング状をした上向きの下端形成面３１ｂ、四角筒状をした外向きの基台部内周形成面３１ｃ及び四角盤リング状をした上向きの中間棚部下側形成面３１ｄを有している。   The movable mold 31 includes an inward base portion outer periphery forming surface 31a having a cylindrical shape, an upward lower end forming surface 31b having a circular ring shape, and an outward base portion inner periphery forming surface 31c having a square tube shape. And it has an upward intermediate shelf lower forming surface 31d in the shape of a square ring.

固定金型３０の中間棚部形成面３０ｄの内側には、該形成面３０ｄより下側に突出した下向き盤状凸部３０ｅが形成されており、この下向き盤状凸部の外周面３０ｆは上側が拡開したテーパ状に形成されている。一方、可動金型３１の中間棚部下側形成面３１ｄの内側には、該形成面３１ｄより上側に突出した上向き盤状凸部３１ｅが形成され、この上向き盤状凸部３１ｅの外周面３１ｆは下側が拡開したテーパ状に形成されている。   On the inner side of the intermediate shelf forming surface 30d of the fixed mold 30, a downward plate-like convex portion 30e protruding downward from the forming surface 30d is formed, and the outer peripheral surface 30f of this downward plate-like convex portion is the upper side. It is formed in a tapered shape with the side expanded. On the other hand, an upward plate-like convex portion 31e protruding upward from the formation surface 31d is formed inside the intermediate shelf lower formation surface 31d of the movable mold 31, and an outer peripheral surface 31f of the upward plate-like convex portion 31e is The lower side is formed in a tapered shape.

上記下向き盤状凸部３０ｅと上向き盤状凸部３１ｅとは、図７に示すように、下向き盤状凸部３０ｅの外周が上向き盤状凸部３１ｅの四隅部より僅かに内側に位置する大きさに形成されている。そして、両金型３０，３１を接合させたときに、中空型部３２の内側においては、前述した固定金型の下向き盤状凸部３０ｅの下面と可動金型の上向き盤状凸部３１ｅの上面とが接合面となるとともに、中空型部３２の外側にあっては、固定金型のレンズユニット支持部外周形成面３０ａの下端と、可動金型の基台部外周形成面３１ａの上端との間が接合面となっている。   As shown in FIG. 7, the downward disc-like convex portion 30e and the upward disc-like convex portion 31e are large in that the outer periphery of the downward disc-like convex portion 30e is located slightly inside the four corners of the upward disc-like convex portion 31e. Is formed. When both the molds 30 and 31 are joined, inside the hollow mold part 32, the lower surface of the downward plate-like convex part 30e of the fixed mold described above and the upward plate-like convex part 31e of the movable mold are formed. The upper surface becomes a bonding surface, and on the outside of the hollow mold portion 32, the lower end of the lens unit support portion outer periphery forming surface 30a of the fixed mold and the upper end of the base portion outer periphery forming surface 31a of the movable die Between is the joint surface.

このように構成される両金型３０，３１を接合させることによって、可動金型の上向き盤状凸部３１ｅの外周面３１ｆによって透光用窓孔２８の各辺部２８ａ〜２８ｄが形成され、その透光窓の四隅部から内側に張り出した形状の画像認識用エッジ部２７ａが、下向き盤状凸部３０ｅの外周面によって形成されるようになっている。   By joining the two molds 30 and 31 configured in this manner, the side portions 28a to 28d of the light transmitting window hole 28 are formed by the outer peripheral surface 31f of the upward plate-like convex portion 31e of the movable mold, An image recognition edge portion 27a having a shape projecting inward from the four corners of the translucent window is formed by the outer peripheral surface of the downward disk-shaped convex portion 30e.

このように構成される固定金型３０及び可動金型３１によってモールド成型される台座２０は、略四角形状をした透光用窓孔２８の四隅部に内側に張り出された画像認識用エッジ部２７ａが、台座２０の下側から視認きることなり、この画像認識用エッジ部２７ａは、レンズユニット２１が支持されるレンズユニット支持部２０ｂの内周面を形成している固定金型３０によって形成されているものであるため、これを自動組み立ての際にカメラによる下側からの画像認識のための指標とすることによって、カメラによって取り込まれる台座の画像情報と、レンズユニット支持部２０ｂに組み込まれたレンズユニット２１の光軸との相対関係が、金型間の嵌合精度に影響されることなく常に一定となり、基板２２に設置した撮像素子２３に対するレンズユニットの光軸合わせの精度を高い状態に安定させることができる。   The pedestal 20 molded by the fixed mold 30 and the movable mold 31 configured as described above has image recognition edge portions projecting inwardly at the four corners of the light transmitting window hole 28 having a substantially rectangular shape. 27a can be seen from the lower side of the pedestal 20, and the edge portion 27a for image recognition is formed by the fixed mold 30 forming the inner peripheral surface of the lens unit support portion 20b on which the lens unit 21 is supported. Therefore, by using this as an index for image recognition from the lower side by the camera during automatic assembly, the image information of the pedestal captured by the camera and the lens unit support unit 20b are incorporated. The relative relationship with the optical axis of the lens unit 21 is always constant without being affected by the fitting accuracy between the molds, and is relative to the image sensor 23 installed on the substrate 22. The accuracy of the optical axis alignment of the lens unit can be stabilized at a high level.

本発明方法によって形成される台座を使用したカメラモジュールの一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the camera module using the base formed by the method of this invention. 同上の台座の底面図である。It is a bottom view of a base same as the above. 図２中のＡ−Ａ線断面図である。It is the sectional view on the AA line in FIG. 図２に示す台座をモールド成型する固定金型の底面図である。It is a bottom view of the fixed metal mold | die which molds the base shown in FIG. 同台座をモールド成型する可動金型の平面図である。It is a top view of the movable metal mold | die which molds the same base. 図４、図５に示す両金型を接合させた状態の図５におけるＢ−Ｂ線部分の断面図である。It is sectional drawing of the BB line part in FIG. 5 of the state which joined both the metal mold | die shown in FIG. 4, FIG. 同Ｃ−Ｃ線部分の断面図である。It is sectional drawing of the CC line part. 従来のカメラモジュールの一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the conventional camera module. 同平面図である。It is the same top view. 図８に示すカメラモジュールのモールド成型状態を示す断面図である。It is sectional drawing which shows the mold molding state of the camera module shown in FIG. 従来の基板に対する基台の組み立て方法を示す説明図である。It is explanatory drawing which shows the assembly method of the base with respect to the conventional board | substrate.

符号の説明Explanation of symbols

２０ 台座
２０ａ 基台部
２０ｂ レンズユニット支持部
２１ レンズユニット
２１ａ バレル
２１ｂ レンズユニット支持部
２２ 基板
２３ 撮像素子
２５ 中間棚部
２６ 凹部
２７ 周縁内面
２７ａ 画像認識用エッジ部
２８ 透光用窓孔
３０ 固定金型
３１ 可動金型
３０ａ レンズユニット支持部外周形成面
３０ｂ 上端形成面
３０ｃ レンズユニット支持部内周形成面
３０ｄ 中間棚部上側形成面
３０ｅ 下向き盤状凸部
３０ｆ 下向き盤状凸部の外周面
３１ａ 基台部外周形成面
３１ｂ 下端形成面
３１ｃ 基台部内周形成面
３１ｄ 中間棚部下側形成面
３１ｅ 上向き盤状凸部
３１ｆ 上向き盤状凸部の外周面
３２ 中空型部 Reference Signs List 20 pedestal 20a base 20b lens unit support 21 lens unit 21a barrel 21b lens unit support 22 substrate 23 imaging device 25 intermediate shelf 26 recess 27 inner peripheral surface 27a image recognition edge 28 translucent window hole 30 fixed metal Mold 31 Movable mold 30a Lens unit support portion outer periphery forming surface 30b Upper end forming surface 30c Lens unit support portion inner periphery forming surface 30d Middle shelf upper side forming surface 30e Downward plate-like convex portion 30f Downward plate-like convex portion outer peripheral surface 31a Base Part outer periphery forming surface 31b Lower end forming surface 31c Base part inner periphery forming surface 31d Intermediate shelf lower side forming surface 31e Upward plate-like convex portion 31f Upward plate-like convex portion outer peripheral surface 32 Hollow mold portion

Claims (3)

撮像素子が配設された基板の上面に下端面が固定される中空リング状の基台部と、該基台部上に一体形成され、内部にレンズユニットが嵌合される筒状をしたレンズユニット支持部と、前記レンズユニット支持部内の底部に内向きフランジ状に形成され、中央部分に透光用窓孔を有する中間棚部とを一体に有するカメラモジュール用台座を、固定金型と可動金型とをもってモールド成型するカメラモジュール用台座の製造方法において、
該台座を構成する部分の少なくとも前記レンズユニット支持部内周面と、前記基台部側から視認できる窓孔の内周縁部の一部を構成する画像認識用エッジ部とを、前記固定または可動何れかの同一金型によって形成させることを特徴としてなるカメラモジュール用台座の製造方法。 A hollow ring-shaped base portion whose lower end surface is fixed to the upper surface of the substrate on which the image sensor is disposed, and a cylindrical lens integrally formed on the base portion and having a lens unit fitted therein A camera module pedestal having a unit support and an intermediate shelf formed in an inward flange shape at the bottom of the lens unit support and having a light transmitting window hole in the center is movable with a fixed mold. In the manufacturing method of the camera module pedestal molded with the mold,
At least the lens unit support part inner peripheral surface of the part constituting the pedestal and the image recognition edge part constituting a part of the inner peripheral part of the window hole visible from the base part side are either fixed or movable. A method for manufacturing a camera module pedestal, characterized by being formed by the same mold. 前記固定金型に、前記台座の前記レンズユニット支持部の内面を形成するレンズユニット支持部内周形成面及び前記の上面を形成する中間棚部上側形成面を備えるとともに該中間棚部上側形成面に、その中央部分に下向き盤状凸部を一体に備え、
前記可動金型に、前記基台部の内周面を形成する基台部内周形成面と、前記中間棚部の下側面を形成する中間棚部下側形成面とを備えるとともに、該中間棚部下側形成面の中央部分に、前記透光用窓孔の内周面を形成する上向き盤状凸部を備え、
該上向き盤状凸部の上面外周縁より内側に、前記上向き盤状凸部の下面外周縁の一部が位置される形状とすることによって、前記両盤状凸部を接合させた際に、可動金型によって形成される四角形状の透光用窓孔の内周縁の一部に、固定金型によって前記画像認識用エッジが形成されるようにしてなる請求項１に記載のカメラモジュール用台座の製造方法。 The fixed mold is provided with a lens unit support portion inner periphery forming surface that forms an inner surface of the lens unit support portion of the pedestal and an intermediate shelf upper forming surface that forms the upper surface, and the intermediate shelf upper forming surface. , With a downward plate-like convex part in the center part,
The movable mold is provided with a base part inner periphery forming surface that forms an inner peripheral surface of the base part, and an intermediate shelf lower side forming surface that forms a lower side surface of the intermediate shelf, and below the intermediate shelf In the central portion of the side forming surface, an upward disk-shaped convex portion that forms the inner peripheral surface of the light transmitting window hole,
When the two disk-shaped convex portions are joined by forming a part of the lower surface outer peripheral edge of the upward disk-shaped convex portion inside the upper surface outer peripheral edge of the upward disk-shaped convex portion, 2. The camera module base according to claim 1, wherein the image recognition edge is formed by a fixed mold at a part of an inner peripheral edge of a rectangular light transmitting window hole formed by a movable mold. Manufacturing method. 前記下向き盤状凸部は、外周面を上側が拡開したテーパ状をした円形状に形成され、前記上向き盤状凸部は、外周面を下側が拡開したテーパ状の４週面を有する四角形状に形成され、
前記上向き盤状凸部の上面の４隅部が、前記下向き盤状凸部の下面外周面より外側に位置される形状とすることによって、可動金型によって形成される四角形状の透光用窓孔の４隅部を角取りした状態に、前記固定金型による画像認識用エッジが形成されるようにしてなる請求項２に記載のカメラモジュール用台座の製造方法。 The downward disk-shaped convex part is formed in a circular shape having a tapered shape with the outer peripheral surface expanded on the upper side, and the upward disk-shaped convex part has a tapered four-week surface with the outer peripheral surface expanded on the lower side. Formed in a square shape,
A quadrangular light-transmitting window formed by a movable mold by forming the four corners on the upper surface of the upward disk-shaped convex portion outside the outer peripheral surface of the lower surface of the downward disk-shaped convex portion. The method for manufacturing a camera module base according to claim 2, wherein an edge for image recognition by the fixed mold is formed in a state where the four corners of the hole are chamfered.
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