JP2004177863A

JP2004177863A - Lens with lens barrel and its manufacturing method

Info

Publication number: JP2004177863A
Application number: JP2002346995A
Authority: JP
Inventors: Kiyoshi Ishii; 清石井; Kenichi Mitani; 健一三谷; Masumi Okajima; 真澄岡島; Masashi Okuma; 真史大熊
Original assignee: Act One KK
Current assignee: Act One KK
Priority date: 2002-11-29
Filing date: 2002-11-29
Publication date: 2004-06-24
Anticipated expiration: 2022-11-29
Also published as: JP4096042B2

Abstract

<P>PROBLEM TO BE SOLVED: To make the outside diameter of a lens with a lens barrel smaller, also, to enhance the coupling strength of the lens barrel and the lens, and also, to easily and inexpensively manufacture the lens with a lens barrel, besides, to enable easily mounting the lens with a lens barrel on a sheet-like mount member, and also, to make the lens with a lens barrel usable as a zoom lens component, as for the lens with a lens barrel and a method for manufacturing the lens with a lens barrel. <P>SOLUTION: The lens with a lens barrel 28 is constituted of a lens barrel member 2 where an annular swelling part 2c is formed on the outer periphery of an intermediate part, an annular recessed groove 2d is formed in the inner peripheral surface and through-holes 2a and 2b communicating between the inside and the outside are arranged in at least one or more places in the swelling part 2c, and a plastic lens 26 obtained by injection-molding in the lens barrel member 2 while fitting the outer peripheral edge part of the lens to the annular recessed groove 2d and partly protruding the outer peripheral edge part of the lens into the through-holes 2a and 2b, and the lens with a lens barrel manufacturing method using an injection molding die device 3 is introduced. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、鏡胴内にプラスチックレンズを一体に射出成形した鏡胴付きレンズとその製造方法に関し、例えば携帯電話に内蔵した撮像レンズや監視用カメラなどの小型撮像装置用レンズ、光ディスクや光磁気ディスクなどの光学ヘッド用のピックアップレンズ、光通信モジュールで光半導体素子と組合せて使用する光結合用レンズ、等々の各種技術分野での利用が可能である。
【０００２】
【従来の技術】
プラスチックレンズは、小形化が容易で且つ安価に大量生産が可能なために、各種技術分野で利用されるようになったが、特に本発明が実施対象とする鏡胴付きプラスチックレンズに関しては、例えば特許文献１に開示されているように、鏡胴（ホルダー）のインサート成形によってプラスチック（モールド）レンズと一体化させる先行技術がある。
【０００３】
【特許文献１】
特開２００２−１４８５０１号公報
【０００４】
特許文献１におけるホルダー付きモールドレンズでは、金属製円筒のホルダーに貫通孔を設け、このホルダーを金型内に装着して貫通孔から円筒部内に成形樹脂材を充填すると、円筒部内にモールドレンズ本体が形成されると共に、当該モールドレンズ本体の外周部分によって、円筒部内周面に設けた突出部が狭持された態様でホルダーとモールドレンズ本体が一体に連結される。
【０００５】
【発明が解決しようとする課題】
特許文献１の場合には、円筒部内周面に設けた突出部によって、レンズ部分の有効断面積が狭められること、円筒部内周面に突出部を設けるためには、ホルダーとして肉厚な金属製円筒を使用する必要があること、などの要因で全体の外径をより小形化する場合の妨げとなると共に、レンズ面を所望の球面にする際の妨げとなる恐れがあった。
【０００６】
また、円筒部内周面に設けた突出部をモールドレンズ本体の外周部分で狭持する連結構造では、充分な強度で連結されない恐れがあること、このホルダー付きモールドレンズを板状の取付部材に装着して使用する場合や、このホルダー付きモールドレンズをズームレンズ部品として使用する場合などについての構想がないと共に、これらの使用形態に適合させることことも困難であった。
【０００７】
そこで本発明では、前記した課題を解消し得る鏡胴付きレンズとその製造方法を提供するものであって、特に外径のより小形化を可能にし且つ鏡胴（ホルダー）とレンズの連結強度を向上させると共に、その製造を容易で且つ安価に行うことを可能にし、また板状の取付部材に容易に装着でき、更にはズームレンズ部品として使用が可能であることなどを主たる目的としている。
【０００８】
【課題を解決するための手段】
本発明の鏡胴付きレンズは、中間部の外周に環状の膨出部を設けて内周面に環状凹溝を形成し、膨出部には内外を連通する貫通孔を少なくとも１個所以上に設けた鏡胴部材と、前記環状凹溝に外周縁部を嵌合すると共に、前記貫通孔内に外周縁部の一部を突出させ、前記鏡胴部材内に一体に射出成形したプラスチックレンズとで構成した。
【０００９】
この鏡胴付きレンズでは、鏡胴部材に設けた膨出部の環状凹溝に対し、プラスチックレンズの外周縁部が嵌合された状態で連結されるので、レンズの有効断面積が損なわれることが無く、また肉薄な鏡胴部材の使用が可能であるから、膨出部を除く鏡胴部材の外径を小さくすることができ、より小形化が可能である。
【００１０】
また、プラスチックレンズと鏡胴部材との連結は、プラスチックレンズの外周縁部が膨出部の環状凹溝に嵌合され、広い接触面積で接合した状態で係止保持されると共に、貫通孔内に充填した成形樹脂材を介して一体化されているので、両者を強固に連結することができる。
【００１１】
また、鏡胴付きレンズを使用する際には、鏡胴部材の外形を挿入する取付け孔を設けた板状の取付部材に対し、鏡胴部材に設けた環状の膨出部によって係止保持した状態にし、膨出部と取付部材との間を溶接や接着などによって容易に連結させることができる。
【００１２】
前記鏡胴付きレンズにおける前記鏡胴部材は、金属パイプで形成する形態を採ることが可能であり、この形態では金属パイプを使用することによって、安価で且つ強度の向上を図ると共に、鏡胴部材の外径寸法を小径化した鏡胴付きレンズを得ることができる。
【００１３】
前記鏡胴付きレンズにおける前記鏡胴部材の外周には、前記プラスチックレンズとは異なる成形樹脂材で２次射出成形した外側鏡胴を設けた形態を採ることが可能であり、この形態では外側鏡胴に適した所望の成形樹脂材を用いることができると共に、必要に応じて割り型を用いて任意の形状をした外側鏡胴を形成することが可能である。
【００１４】
前記鏡胴付きレンズにおける前記鏡胴部材の外周には、前記プラスチックレンズとは同じ成形樹脂材で同時射出成形した外側鏡胴を設けた形態を採ることが可能であり、この形態では２次射出成形によらずに外側鏡胴を容易に成形でき、外側鏡胴によって補強することができると共に、外側鏡胴の外周に取付部を設けたり、その他の所望に応じた任意の形状に後加工することができる。
【００１５】
これらの鏡胴付きレンズにおいて、前記外側鏡胴の外周に螺旋部を設けてズームレンズ部品を形成する形態を採ることが可能であり、この形態によると、小形で安価なズームレンズを容易に製造することが可能である。
【００１６】
本発明の鏡胴付きレンズの製造方法は、中間部の外周に環状の膨出部を設けて内周面に環状凹溝を形成すると共に、膨出部には内外を連通する貫通孔を少なくとも１個所以上に設けた鏡胴部材を金型装置内にインサートし、鏡胴部材内にキャビピンとコアピンで形成したレンズキャビティに対して、前記貫通孔をゲートとして成形樹脂材を充填させ、前記鏡胴部材内にプラスチックレンズを射出成形した。
【００１７】
この鏡胴付きレンズの製造方法では、キャビティ内に成形樹脂材を充填させると、膨出部に外周縁部が嵌合した状態で位置決めされたプラスチックレンズが鏡胴部材内に射出成形され、このプラスチックレンズと鏡胴部材は膨出部及び貫通孔内の成形樹脂材を介して、強固に一体化させることができる。
【００１８】
また、貫通孔を対向位置の２個所に設けて一方をゲートとなる成形樹脂材の流入孔にすると共に、他方をスラッグの流出孔にする形態を採ったり、ゲートとなる流入孔を所定間隔で複数個所に設けた形態を採ることによって、プラスチックレンズの品質を向上させ且つ、プラスチックレンズと鏡胴部材との接合強度を強化することも可能である。
【００１９】
前記鏡胴付きレンズの製造方法における前記鏡胴部材は、中間部に内外を連通する貫通孔を設けると共に、前記鏡胴部材より長尺な金属パイプによる円筒部材を前記金型装置内にインサートし、前記キャビピンとコアピンで圧縮成形して前記膨出部及び環状凹溝を形成した形態を採ることが可能であり、この形態では同じ金型装置を用いて鏡胴部材に膨出部を圧縮成形する作業と、この膨出部付きの鏡胴部材をインサートして鏡胴付きレンズを射出成形する作業とを行うことができ、きわめて経済的である。
【００２０】
前記鏡胴付きレンズの製造方法において、前記鏡胴付きレンズを２次加工用の金型装置内にインサートし、前記鏡胴部材の外周に形成した外側鏡胴キャビィティに対して、前記プラスチックレンズとは異なる成形樹脂材で外側鏡胴を２次射出成形した形態を採ることが可能である。
【００２１】
この鏡胴付きレンズの製造方法では、１次加工ではプラスチックレンズに適する成形樹脂材を、２次加工では外側鏡胴に適する成形樹脂材を個別に選択使用できると共に、外側鏡胴を射出成形する際には必要に応じて割り型などを使用し、例えばズームレンズ用の螺旋部その他の複雑な形状を施すことが可能である。
【００２２】
本発明の別の鏡胴付きレンズの製造方法は、中間部の外周に環状の膨出部を設けて内周面に環状凹溝を形成すると共に、膨出部には内外を連通する貫通孔を少なくとも１個所以上に設けた鏡胴部材を金型装置内にインサートし、鏡胴部材内にキャビピンとコアピンで形成したレンズキャビティに対して、前記貫通孔をゲートとして成形樹脂材を充填すると共に、同時に鏡胴部材の外周に形成した外側鏡胴キャビィティに成形樹脂材を充填させ、前記鏡胴部材内に成形したプラスチックレンズと、鏡胴部材の外周に成形した外側鏡胴とを、前記貫通孔内に充填した成形樹脂材で連結した。
【００２３】
この鏡胴付きレンズの製造方法では、１つの射出成形用金型装置によって、鏡胴部材内にプラスチックレンズを射出成形する作業と、鏡胴部材の外周に外側鏡胴を射出成形する作業とを同時に行うので、前記した外側鏡胴を２次加工で射出成形する場合に比べ、容易且つ安価に製造を行うことができると共に、プラスチックレンズと鏡胴部材及び外側鏡胴を強固に一体化することが可能である。
【００２４】
【発明の実施の形態】
以下に、本発明のプラスチックレンズとその製造方法について、本発明を適用した図示の実施形態に基づき詳細に説明すると、図１は、射出成形用の金型装置内にインサート部品として収容され、成形樹脂材で射出成形したプラスチックレンズの鏡胴部材の一例を示すものである。
【００２５】
鏡胴部材２は、図１（ａ）（ｂ）で示すように、ステンレスパイプなどの金属パイプの長さ方向の中央部に対し、前後に連通状の貫通孔１ａ，１ｂを設けた円筒部材１を用い、射出成形用の金型装置３内で圧縮成形を行って、図１（ｃ）で示すような中間部の外周に環状の膨出部２ｃを設けて内周面に環状凹溝２ｄを形成し、膨出部２ｃには貫通孔１ａ，１ｂを変形した流入孔２ａと流出孔２ｂを形成する。
【００２６】
金型装置３は、図２の要部全体縦断面図で示すように、固定側金型部３Ａと可動側金型部３Ｂで構成されており、固定側金型部３Ａには、ロケートリング４と固定側取付け板５及び固定側型板６を設け、ロケートリング４と固定側取付け板５には、射出成形機のノズルが挿入されるノズル装着孔７を形成している。
【００２７】
固定側型板６には、スプール８を形成するスプールブッシュ９が、先端側をノズル装着孔７に突出させる態様で装着されると共に、スプールブッシュ９の隣接位置にはキャビ側入れ子１０が装着され、キャビ側入れ子１０内にはキャビピン１１が固定支持されている。
【００２８】
可動側金型部３Ｂには、可動側型板１２と受け板１３とスペーサブロック１４及び可動側取付け板１５を設け、可動側取付け板１５上には上下にエジェクタープレート１６を配置し、エジェクターピン１７の基端側を固定支持すると共に、エジェクターピン１７の隣接位置にはコア側入れ子１８が装着され、コア側入れ子１８内にはコアピン１９が固定支持されている。
【００２９】
図３は、型開き状態における金型分割面ＰＬ近傍の部分拡大縦断面図であり、固定側型板６（キャビプレート）と可動側型板１２（コアプレート）の接合面に溝穴２０Ａ，２０Ｂを設け、型締めした際にスプール８と連通するランナー２０を形成すると共に、ランナー２０はキャビピン１１とコアピン１９の間を横切って、溝穴２１Ａ，２１Ｂで形成した先端側のスラッグウェル２１に達する。
【００３０】
キャビピン１１とコアピン１９は、先端側の外周面に段差を設けて小径にし、キャビ側入れ子１０及びコア側入れ子１８の内周面との間に、環状溝２２Ａ，２２Ｂを設けると共に、小径部の先端に凹状球面２３Ａ，２３Ｂを設け、小径部の先端外周面に隣接したキャビ側入れ子１０及びコア側入れ子１８の先端内周には円弧状切欠面２４Ａ，２４Ｂを設けている。
【００３１】
これにより、図４で示すように型締め状態にすると、環状溝２２Ａ，２２Ｂが円筒部材１を装着する環状のインサート溝２２を形成すると共に、凹状球面２３Ａ，２３Ｂがプラスチックレンズを射出成形するレンズキャビティ２３を形成し、円弧状切欠面２４Ａ，２４Ｂが円筒部材１を圧縮成形する環状の変形空間２４を形成する。
【００３２】
図４は、金型装置３内にインサートした円筒部材１を、圧縮成形で鏡胴部材２にする圧縮成形工程を示すが、図３で示す型開きした状態で可動側型板１２の環状溝２２Ｂに円筒部材１の下半部をセットし、図４で示す型締め状態にすると、金型分割面ＰＬに沿った中央部の外周に環状の膨出部２ｃを形成すると共に、内周面には環状凹溝２ｄが形成され、膨出部２ｃには貫通孔１ａ，１ｂが変形した流入孔２ａと流入孔２ｂを形成する鏡胴部材２となる。
【００３３】
すなわち、型締めによって円筒部材１の上半部が環状溝２２Ａに嵌合すると共に、キャビピン１１の先端側が円筒部材１内に挿入されるが、インサート溝２２の高さ寸法より円筒部材１の高さ寸法を大きく設定しておくと、キャビピン１１とコアピン１９の間で圧縮された円筒部材１は変形空間２４側へ膨出し、環状の膨出部２ｃと環状凹溝２ｄを備えた鏡胴部材２となる。
【００３４】
図５は、鏡胴部材２をインサートした金型装置３内に成形樹脂材２５を充填して、鏡胴部材２と一体にプラスチックレンズ２６を射出成形する射出成形工程を示すが、スプール８に注入した成形樹脂材２５はランナー２０を通って、鏡胴部材２の膨出部２ｃに形成された流入孔２ａをゲートとしてレンズキャビティ２３内に充填された後に、流出孔２ｂを介してスラッグウェル２１にコールドスラッグ２７として滞積される。
【００３５】
射出成形後は、型開きと同時に鏡胴部材２及びプラスチックレンズ２６を含む樹脂成形部は、エジェクターピン１７によって図６（ａ）の状態で突き出されるので、不要な成形樹脂材２０及びコールドスラッグ２７を除去し、鏡胴部材２とプラスチックレンズ２６が一体化された図６（ｂ）の鏡胴付きレンズ２８を得ることができる。
【００３６】
この鏡胴付きレンズ２８は、鏡胴部材２に設けた環状凹溝２ｄに対し、プラスチックレンズ２６の外周縁部が嵌合された状態で連結されるので、レンズの有効断面積が損なわれることが無く、また肉薄な鏡胴部材の使用して膨出部２ｃを除く外径寸法を小さくすることができ、より小形化が可能である。
【００３７】
また、プラスチックレンズ２６の外周縁部の全体が、鏡胴部材２に形成した環状凹溝２ｄに嵌合し、広い接触面積で接合した状態で係止保持がされていると共に、図示の実施形態では外周縁部の対向する２個所において、流入孔２ａと流出孔２ｂに成形樹脂材２０が充填された状態で鏡胴部材２に連結されているので、正確な位置決め精度で且つ強固な連結保持状態が得られる。
【００３８】
鏡胴付きレンズ２８は、例えば図７で示すように所望な取付け板２９の取付け孔２９ａに対して、鏡胴部材２を挿入して膨出部２ｃによって抜け止めを行うと共に、膨出部２ｃと取付け板２９との間を溶接又は接着などによって、容易且つ強固に連結して使用することができる。
【００３９】
なお、本発明は前記した図示の実施形態に限定されるものではなく、要旨の範囲内で各種の変形を採り得るものであり、例えば先の実施形態では鏡胴部材２の膨出部２ｃに対し、ゲートとなる流入孔２ａとコールドスラッグ２７を流出する流出孔２ｂを設けたが、ゲートとなる流入孔２ａのみとした形態や、流入孔２ａを２個所以上に設けて複数のゲートを形成する形態を採ることも可能である。
【００４０】
流入孔２ａの数を多くする場合には、例えば１２０度間隔で３個所又は９０度間隔で４個所に設け、各流入孔２ａによるゲートに対してリング状のライナーから放射方向に成形樹脂材２０を注入する形態を採り、これによって射出成形が均一に行われると共に、これらの流入孔２ａに充填された成形樹脂材を介して、プラスチックレンズ２６と外側鏡胴３７の間がより強固に連結される。
【００４１】
また、キャビピン１１とコアピン１９の小径部先端に形成した凹状球面２３Ａ，２３Ｂは、プラスチックレンズの形状に適合させた所望の球状面をしたレンズキャビティ２３に形成することができるが、凸レンズだけではなく凹レンズに適合させることも可能であり、その場合には凹レンズの球状面に合わせて小径部先端に凸状球面を形成する。
【００４２】
また、先の実施形態では鏡胴部材２の製造を容易にするために、射出成形用の金型装置３を用いて円筒部材１から鏡胴部材２を圧縮成形したが、図１（ｃ）の形状をした鏡胴部材２を別途の製造手段で造り、この鏡胴部材２を図４のように金型装置３にインサートして射出成形する形態を採ることも可能である。
【００４３】
この場合には、金型装置３内で圧縮成形を行う必要がないので、鏡胴部材２は金属パイプには限定されず、セラミックその他の材質の使用も可能であるが、特に鏡胴部材として金属パイプを使用すると、強度の向上を図ることができると共に、肉薄状にして外径寸法を小径化した鏡胴付きレンズを得ることができる。
【００４４】
次に、図６（ｂ）の鏡胴付きレンズ２８をインサート部品として、別の射出成形用の金型装置（図示を省略）を用いて２次加工を行い、図８（ａ）で示すように、鏡胴部材２の外周に外側鏡胴３０を一体成形し、外側鏡胴３０が環状の膨出部２ｃに形成した流入孔２ａ及び流出孔２ｂ内の成形樹脂材を介して、プラスチックレンズ２６と連結した鏡胴付きレンズ２８Ａを製造することができる。
【００４５】
鏡胴付きレンズ２８Ａは、多目的に利用する場合には、外側鏡胴３０の外周面を凹凸のない円形状に射出成形し、後加工で用途に応じた所望の外形に仕上げても良いが、用途が特定されている場合には、所望の外形をした外側鏡胴キャビティ内で射出成形することが望ましく、特にアンダーカットのある成形品の場合には割り型を使用する。
【００４６】
図８（ｂ）（ｃ）は、鏡胴付きレンズ２８をインサート部品とし、ズームレンズ部品３２，３４を製造した実施形態であり、図８（ｂ）は外側鏡胴３０の外周面に凹状の螺旋部３１を形成したズームレンズ部品３２を、図８（ｃ）は外側鏡胴３０の外周面に凸状の螺旋部３３を形成したズームレンズ部品３４を示す。
【００４７】
次に、図９は別の実施形態による射出成形用の金型装置３５の部分拡大断面図を示すが、この実施形態では外側鏡胴を２次射出成形によらずに、プラスチックレンズと同時成形するものであり、金型装置３５は図３の金型装置３におけるキャビ側入れ子１０及びコア側入れ子１８の一部を変更した構造である。
【００４８】
すなわち、キャビ側入れ子１０及びコア側入れ子１８の先端側内周面に対し、一定幅で切り欠いた環状溝３６Ａ，３６Ｂをキャビピン１１及びコアピン１９の先端側小径部に隣接して設け、小径部の外周面と環状溝３６Ａ，３６Ｂの間には、内周側に鏡胴部材２を装着すると共に、その外周側には環状溝３６Ａ，３６Ｂによる外側鏡胴キャビティ３６を形成する。
【００４９】
これにより、金型装置３５を型締めした状態で成形樹脂材２５による射出成形を行うと、内側に形成したレンズキャビティ２３及び外側に形成した外側鏡胴キャビティ３６に成形樹脂材２５が充填され、図１０（ａ）で示すように鏡胴部材２の外周面にプラスチックレンズ２６と一体の外側鏡胴３７を形成した鏡胴付きレンズ３８を製造することができる。
【００５０】
この鏡胴付きレンズ３８を製造する際には、先の実施形態の場合と同様に外側鏡胴キャビティ３６内に円筒部材１を装着させ、金型装置３５内で圧縮成形して環状の膨出部２ｃ及び環状凹溝２ｄを形成した図１（ｃ）の鏡胴部材２にすることも可能であり、また外側鏡胴３７の外周に後加工で図１０（ｂ）で示すように凹状の螺旋部３９を形成し、ズームレンズ部品４０を製造することができる。
【００５１】
この実施形態では、先の実施形態と同様に環状凹溝２ｄでプラスチックレンズ２６の外周縁部が係止保持され、而も外側鏡胴３７を一体に同時成形してプラスチックレンズ２６と連結しているので、先の実施形態の場合よりもプラスチックレンズ２６を強固に連結保持することが可能である。
【００５２】
なお、図８による前者の実施形態と図１０による後者の実施形態との相違は、前者の場合はプラスチックレンズ２６に適する合成樹脂材と、外側鏡胴３０に適する合成樹脂材を個別に選択して使用することが可能であり、後者の場合は外側鏡胴３７にプラスチックレンズ２６と同じ合成樹脂材を使用する必要がある。
【図面の簡単な説明】
【図１】本発明を適用した実施形態による鏡胴付きレンズの構成部材であって、（ａ）は円筒部材の正面図を、（ｂ）は同縦断面図を、（ｃ）は膨出部付き鏡胴部材の縦断面図を、それぞれ示す。
【図２】本発明を適用した実施形態による鏡胴付きレンズを製造する金型装置の要部全体縦断面図を示す。
【図３】図２の金型装置の型開き状態における金型分割面ＰＬ近傍の部分拡大縦断面図を示す。
【図４】図２の金型装置を用いて円筒部材を圧縮成形して鏡胴部材を形成する圧縮成形工程を示す。
【図５】図２の金型装置を用いて鏡胴部材と一体にプラスチックレンズを射出成形する射出成形工程を示す。
【図６】図５の射出成形工程で射出成形した射出成形品であり、（ａ）はノックアウトした射出成形品の縦断面図を、（ｂ）は不要部分を除去した鏡胴付きレンズの縦断面図を、それぞれ示す。
【図７】図６の鏡胴付きレンズの使用状態を斜視図で示す。
【図８】図６の鏡胴付きレンズを用いたズームレンズ部品であって、（ａ）は射出成形よって外側鏡胴を２次加工した成形品の縦断面図を、（ｂ）は外側鏡胴に凹状の螺旋部を形成したズームレンズ部品の縦断面図を、（ｃ）は外側鏡胴に凸状の螺旋部を形成したズームレンズ部品の縦断面図を、それぞれ示す。
【図９】本発明を適用した別の実施形態による射出成形用の金型装置の部分拡大断面図を示す。
【図１０】図９の金型装置を用いて製造したズームレンズ部品であって、（ａ）は射出成形よって外側鏡胴を同時成形した成形品の縦断面図を、（ｂ）は外側鏡胴に凹状の螺旋部を形成したズームレンズ部品の縦断面図を、それぞれ示す。
【符号の説明】
１円筒部材
１ａ，１ｂ貫通孔
２鏡胴部材
２ａ流入孔
２ｂ流出孔
２ｃ膨出部
２ｄ環状凹溝
３，３５金型装置
３Ａ固定側金型部
３Ｂ可動側金型部
４ロケートリング
５固定側取付け板
６固定側型板
７ノズル挿着孔
８スプール
９スプールブッシュ
１０キャビ側入れ子
１１キャビピン
１２可動側型板
１３受け板
１４スペーサブロック
１５可動側型板
１６エジェクタープレート
１７エジェクターピン
１８コア側入れ子
１９コアピン
２０ランナー
２０Ａ，２０Ｂ（ランナー用の）溝穴
２１スラッグウエル
２１Ａ，２１Ｂ（スラッグウエル用の）溝穴
２２インサート溝
２２Ａ，２２Ｂ，３６Ａ，３６Ｂ環状溝
２３レンズキャビティ
２３Ａ，２３Ｂ凹状球面
２４変形空間
２４Ａ，２４Ｂ円弧状切欠面
２５成形樹脂材
２６プラスチックレンズ
２７コールドスラッグ
２８，３８鏡胴付きレンズ
２９取付け板
２９ａ取付け孔
３０，３７外側鏡胴
３１，３９（凹状の）螺旋部
３２，３４，４０ズームレンズ部品
３３（凸状の）螺旋部
３６外側鏡胴キャビティ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lens with a lens barrel in which a plastic lens is integrally molded in a lens barrel and a method of manufacturing the same. It can be used in various technical fields such as a pickup lens for an optical head such as a disk, an optical coupling lens used in combination with an optical semiconductor element in an optical communication module, and the like.
[0002]
[Prior art]
Plastic lenses have been used in various technical fields because they can be easily miniaturized and mass-produced at low cost.In particular, regarding a plastic lens with a lens barrel to which the present invention is applied, for example, As disclosed in Patent Document 1, there is a prior art in which a lens barrel (holder) is integrated with a plastic (mold) lens by insert molding.
[0003]
[Patent Document 1]
JP 2002-148501 A
In the molded lens with a holder in Patent Document 1, a through hole is provided in a metal cylindrical holder, and the holder is mounted in a mold and a molding resin material is filled into the cylindrical portion from the through hole. Is formed, and the holder and the molded lens body are integrally connected by the outer peripheral portion of the molded lens body such that the protrusion provided on the inner peripheral surface of the cylindrical portion is sandwiched.
[0005]
[Problems to be solved by the invention]
In the case of Patent Document 1, the effective cross-sectional area of the lens portion is reduced by the protrusion provided on the inner peripheral surface of the cylindrical portion. In order to provide the protrusion on the inner peripheral surface of the cylindrical portion, a thick metal plate is used as a holder. For example, the necessity of using a cylinder may hinder a reduction in the overall outer diameter, and may hinder a lens surface from forming a desired spherical surface.
[0006]
Also, with the connection structure in which the protrusion provided on the inner peripheral surface of the cylindrical portion is pinched by the outer peripheral portion of the molded lens body, there is a possibility that the connection may not be performed with sufficient strength, and this molded lens with holder is attached to a plate-like mounting member In addition, there is no concept of using the molded lens with a holder as a zoom lens part, and it is difficult to adapt the lens to these usage forms.
[0007]
In view of the above, the present invention provides a lens with a lens barrel and a method for manufacturing the same, which can solve the above-mentioned problems. In particular, it is possible to further reduce the outer diameter of the lens and to reduce the connection strength between the lens barrel (holder) and the lens. The main object of the present invention is to make it easier and cheaper to manufacture it, to be able to be easily mounted on a plate-like mounting member, and to be able to be used as a zoom lens component.
[0008]
[Means for Solving the Problems]
In the lens with a lens barrel of the present invention, an annular bulge is provided on the outer periphery of the intermediate portion to form an annular groove on the inner peripheral surface, and the bulge has at least one or more through holes communicating between the inside and the outside. A lens barrel member provided, a plastic lens molded into the lens barrel member by fitting an outer peripheral edge into the annular groove, projecting a part of the outer peripheral edge into the through-hole, and integrally molding the lens into the lens barrel member; It consisted of.
[0009]
In this lens with a lens barrel, since the outer peripheral edge of the plastic lens is connected to the annular concave groove of the bulging portion provided in the lens barrel member while being fitted, the effective sectional area of the lens is impaired. Since a thin lens barrel member can be used without the above problem, the outer diameter of the lens barrel member excluding the bulging portion can be reduced, and the size can be further reduced.
[0010]
Further, the connection between the plastic lens and the lens barrel member is performed by fitting the outer peripheral edge of the plastic lens into the annular concave groove of the bulging portion and holding the plastic lens in a state where it is joined with a large contact area. Since they are integrated via the molding resin material filled in the resin, they can be strongly connected to each other.
[0011]
Further, when using the lens with a lens barrel, the lens was held and retained by a ring-shaped bulging portion provided on the lens barrel member with respect to a plate-like mounting member provided with a mounting hole for inserting the outer shape of the lens barrel member. In this state, the bulging portion and the mounting member can be easily connected to each other by welding or bonding.
[0012]
The lens barrel member in the lens with the lens barrel can take a form formed of a metal pipe. In this form, the use of a metal pipe reduces the cost and improves the strength. A lens with a lens barrel having a reduced outer diameter can be obtained.
[0013]
The outer periphery of the lens barrel member in the lens with the lens barrel may be provided with an outer lens barrel formed by secondary injection molding with a molding resin material different from the plastic lens. It is possible to use a desired molding resin material suitable for the barrel, and to form the outer barrel having an arbitrary shape by using a split mold as needed.
[0014]
The outer periphery of the lens barrel member in the lens with the lens barrel may be provided with an outer lens barrel which is simultaneously injection-molded with the same molding resin material as the plastic lens. The outer lens barrel can be easily formed without molding, can be reinforced by the outer lens barrel, and can be provided with a mounting portion on the outer circumference of the outer lens barrel or post-processed to any other desired shape. be able to.
[0015]
In these lenses with a lens barrel, it is possible to adopt a mode in which a spiral part is provided on the outer periphery of the outer lens barrel to form a zoom lens component. According to this mode, a small and inexpensive zoom lens can be easily manufactured. It is possible to do.
[0016]
In the method of manufacturing a lens with a lens barrel according to the present invention, an annular bulge is provided on the outer periphery of the intermediate portion to form an annular groove on the inner peripheral surface, and the bulge has at least a through hole communicating between the inside and the outside. The lens barrel member provided at one or more locations is inserted into a mold device, and a lens cavity formed by a cavity pin and a core pin in the lens barrel member is filled with a molding resin material using the through-hole as a gate, and A plastic lens was injection molded in the body member.
[0017]
In this method of manufacturing a lens with a lens barrel, when a molding resin material is filled in the cavity, a plastic lens positioned with the outer peripheral edge fitted to the bulging portion is injection molded into the lens barrel member. The plastic lens and the lens barrel member can be firmly integrated via the bulging portion and the molding resin material in the through hole.
[0018]
In addition, two through holes are provided at opposing positions, one of which serves as an inlet for the molding resin material serving as a gate, and the other serves as an outlet for a slug. By adopting a form provided at a plurality of locations, it is possible to improve the quality of the plastic lens and to increase the bonding strength between the plastic lens and the lens barrel member.
[0019]
The lens barrel member in the method of manufacturing a lens with a lens barrel, a through-hole communicating between the inside and outside is provided in an intermediate portion, and a cylindrical member made of a metal pipe longer than the lens barrel member is inserted into the mold device. It is possible to adopt a form in which the bulging portion and the annular groove are formed by compression molding with the cavity pin and the core pin. In this embodiment, the bulging portion is compression-molded in the lens barrel member using the same mold apparatus. And the operation of inserting the lens barrel member with the bulging portion and injection molding the lens with the lens barrel can be performed, which is extremely economical.
[0020]
In the method of manufacturing a lens with a lens barrel, the lens with a lens barrel is inserted into a mold apparatus for secondary processing, and the plastic lens and the outer lens cavity formed on the outer periphery of the lens barrel member are provided with the plastic lens. It is possible to adopt a form in which the outer lens barrel is subjected to secondary injection molding with a different molding resin material.
[0021]
In this method of manufacturing a lens with a lens barrel, a molding resin material suitable for a plastic lens can be selectively used in primary processing, and a molding resin material suitable for an outer lens barrel can be individually used in secondary processing, and the outer lens barrel is injection-molded. In this case, it is possible to use a split mold or the like as necessary, for example, to form a spiral portion for a zoom lens or other complicated shapes.
[0022]
Another method of manufacturing a lens with a barrel according to the present invention is to provide an annular bulge on the outer periphery of the intermediate portion to form an annular concave groove on the inner peripheral surface, and a through hole communicating the inside and the outside of the bulge. A lens barrel member provided at least at one or more locations is inserted into a mold apparatus, and a lens cavity formed by a cavity pin and a core pin in the lens barrel member is filled with a molding resin material using the through hole as a gate. At the same time, the outer lens cavity formed on the outer periphery of the lens barrel member is filled with a molding resin material, and the plastic lens formed in the lens barrel member and the outer lens barrel formed on the outer circumference of the lens barrel member are passed through the through-hole. The connection was made with a molding resin material filled in the holes.
[0023]
In this method of manufacturing a lens with a lens barrel, the operation of injection-molding a plastic lens in the lens barrel member and the operation of injection-molding the outer lens barrel on the outer periphery of the lens barrel member are performed by one injection molding die apparatus. Simultaneously, the outer lens barrel can be easily and inexpensively manufactured as compared with the case where the outer lens barrel is injection-molded by secondary processing, and the plastic lens, the lens barrel member, and the outer lens barrel are firmly integrated. Is possible.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the plastic lens of the present invention and the method of manufacturing the same will be described in detail based on the illustrated embodiment to which the present invention is applied. FIG. 1 shows an example of a lens barrel member of a plastic lens injection-molded with a resin material.
[0025]
As shown in FIGS. 1 (a) and 1 (b), the lens barrel member 2 is a cylindrical member provided with through holes 1a and 1b communicating with each other in the longitudinal direction at the center in the longitudinal direction of a metal pipe such as a stainless steel pipe. 1, compression molding is performed in a mold apparatus 3 for injection molding, and an annular bulge 2 c is provided on the outer periphery of an intermediate portion as shown in FIG. 2d is formed, and an inflow hole 2a and an outflow hole 2b obtained by deforming the through holes 1a and 1b are formed in the bulging portion 2c.
[0026]
The mold device 3 is composed of a fixed mold portion 3A and a movable mold portion 3B, as shown in the overall vertical sectional view of the main part of FIG. 2. The fixed mold portion 3A includes a locate ring. 4, a fixed-side mounting plate 5 and a fixed-side mold plate 6 are provided. The locating ring 4 and the fixed-side mounting plate 5 have a nozzle mounting hole 7 into which a nozzle of an injection molding machine is inserted.
[0027]
A spool bush 9 forming a spool 8 is mounted on the fixed-side mold plate 6 in such a manner that the leading end side projects into the nozzle mounting hole 7, and a mold side insert 10 is mounted adjacent to the spool bush 9. A cabinet pin 11 is fixedly supported in the mold side insert 10.
[0028]
The movable mold section 3B is provided with a movable mold plate 12, a receiving plate 13, a spacer block 14, and a movable mounting plate 15, and an ejector plate 16 is disposed on the movable mounting plate 15 in an up-down direction. 17 is fixedly supported on the base end side thereof, and a core-side insert 18 is mounted at a position adjacent to the ejector pin 17, and a core pin 19 is fixedly supported in the core-side insert 18.
[0029]
FIG. 3 is a partially enlarged vertical cross-sectional view near the mold division plane PL in the mold open state, and a slot 20A is formed in a joint surface between the fixed mold plate 6 (cavity plate) and the movable mold plate 12 (core plate). 20B is provided to form a runner 20 that communicates with the spool 8 when the mold is clamped, and the runner 20 traverses between the cavity pin 11 and the core pin 19 and is formed in the slug well 21 on the tip side formed by the slots 21A and 21B. Reach.
[0030]
The cavity pin 11 and the core pin 19 are provided with a step on the outer peripheral surface on the distal end side to reduce the diameter, and annular grooves 22A and 22B are provided between the cavity side insert 10 and the inner peripheral surface of the core side insert 18 to reduce the diameter. Concave spherical surfaces 23A and 23B are provided at the distal ends, and arc-shaped notched surfaces 24A and 24B are provided on the inner peripheral ends of the mold side insert 10 and the core side insert 18 adjacent to the outer peripheral surface of the small diameter portion.
[0031]
Thus, when the mold is clamped as shown in FIG. 4, the annular grooves 22A and 22B form the annular insert groove 22 for mounting the cylindrical member 1, and the concave spherical surfaces 23A and 23B are formed by injection molding a plastic lens. The cavity 23 is formed, and the arc-shaped notched surfaces 24A and 24B form an annular deformation space 24 in which the cylindrical member 1 is compression-molded.
[0032]
FIG. 4 shows a compression molding step of converting the cylindrical member 1 inserted into the mold apparatus 3 into the lens barrel member 2 by compression molding. In the state shown in FIG. 3, the annular groove of the movable mold plate 12 is opened. When the lower half portion of the cylindrical member 1 is set to 22B and the mold is clamped as shown in FIG. 4, an annular bulge 2c is formed on the outer periphery of the central portion along the mold division surface PL, and the inner peripheral surface is formed. Is formed with an annular concave groove 2d, and the bulging portion 2c becomes the lens barrel member 2 forming the inflow hole 2a and the inflow hole 2b in which the through holes 1a and 1b are deformed.
[0033]
That is, the upper half portion of the cylindrical member 1 is fitted into the annular groove 22A by the mold clamping, and the tip end of the cavities 11 is inserted into the cylindrical member 1. However, the height of the cylindrical member 1 is larger than the height of the insert groove 22. If the length is set to be large, the cylindrical member 1 compressed between the cabine pin 11 and the core pin 19 swells toward the deformation space 24, and a lens barrel member having an annular swelling portion 2 c and an annular concave groove 2 d. It becomes 2.
[0034]
FIG. 5 shows an injection molding process in which a molding resin material 25 is filled in a mold apparatus 3 in which the lens barrel member 2 is inserted, and a plastic lens 26 is integrally molded with the lens barrel member 2. The injected molding resin material 25 passes through the runner 20 and is filled into the lens cavity 23 with the inflow hole 2a formed in the bulging portion 2c of the lens barrel member 2 as a gate, and then the slug well through the outflow hole 2b. 21 is accumulated as a cold slug 27.
[0035]
After the injection molding, the resin molded portion including the lens barrel member 2 and the plastic lens 26 is pushed out by the ejector pins 17 in the state shown in FIG. By removing the lens 27, a lens with a lens barrel 28 shown in FIG. 6B in which the lens barrel member 2 and the plastic lens 26 are integrated can be obtained.
[0036]
Since the lens 28 with the lens barrel is connected to the annular concave groove 2d provided in the lens barrel member 2 with the outer peripheral edge of the plastic lens 26 fitted, the effective sectional area of the lens is impaired. The use of a thin lens barrel member makes it possible to reduce the outer diameter except for the bulging portion 2c, thereby enabling further miniaturization.
[0037]
In addition, the entire outer peripheral edge of the plastic lens 26 is fitted into the annular concave groove 2d formed in the lens barrel member 2 and is locked and held in a state where the plastic lens 26 is joined with a large contact area. In this embodiment, the resin is connected to the lens barrel member 2 in a state in which the inflow hole 2a and the outflow hole 2b are filled with the molding resin material 20 at two opposing outer peripheral portions, so that accurate positioning accuracy and strong connection and holding are maintained. The state is obtained.
[0038]
As shown in FIG. 7, for example, as shown in FIG. 7, the lens with a lens barrel 28 inserts the lens barrel member 2 into a mounting hole 29a of a desired mounting plate 29 to prevent it from falling off by a bulging portion 2c, And the mounting plate 29 can be easily and firmly connected to each other by welding or bonding.
[0039]
The present invention is not limited to the illustrated embodiment described above, but may take various modifications within the scope of the gist. For example, in the above embodiment, the bulging portion 2c of the lens barrel member 2 On the other hand, the inflow hole 2a serving as a gate and the outflow hole 2b for flowing out the cold slug 27 are provided. However, only the inflow hole 2a serving as a gate is provided, or a plurality of gates are formed by providing the inflow hole 2a at two or more locations. It is also possible to take the form of doing.
[0040]
In the case of increasing the number of the inflow holes 2a, for example, the inflow holes 2a are provided at three places at 120-degree intervals or at four places at 90-degree intervals, and the molding resin material 20 is radiated from the ring-shaped liner to the gate formed by each inflow hole 2a. Injection molding is performed uniformly, and the plastic lens 26 and the outer lens barrel 37 are more firmly connected via the molding resin material filled in the inflow holes 2a. You.
[0041]
In addition, the concave spherical surfaces 23A and 23B formed at the tips of the small diameter portions of the cavity pin 11 and the core pin 19 can be formed in the lens cavity 23 having a desired spherical surface adapted to the shape of the plastic lens. It is also possible to adapt to a concave lens, in which case a convex spherical surface is formed at the tip of the small diameter portion to match the spherical surface of the concave lens.
[0042]
Further, in the above embodiment, the lens barrel member 2 was compression-molded from the cylindrical member 1 using the injection molding die apparatus 3 in order to facilitate the manufacture of the lens barrel member 2, but FIG. It is also possible to adopt a form in which the lens barrel member 2 having the shape of (1) is manufactured by a separate manufacturing means, and the lens barrel member 2 is inserted into a mold apparatus 3 and injection-molded as shown in FIG.
[0043]
In this case, since there is no need to perform compression molding in the mold apparatus 3, the lens barrel member 2 is not limited to a metal pipe, and ceramic and other materials can be used. When a metal pipe is used, the strength can be improved, and a lens with a lens barrel having a thinner outer diameter can be obtained.
[0044]
Next, using the lens 28 with the lens barrel of FIG. 6B as an insert part, secondary processing is performed using another mold device for injection molding (not shown), as shown in FIG. 8A. The outer lens barrel 30 is integrally formed on the outer periphery of the lens barrel member 2, and the outer lens barrel 30 is formed of a plastic lens through an inflow hole 2a and an outflow hole 2b formed in an annular bulging portion 2c. A lens 28A with a lens barrel connected to the lens 26 can be manufactured.
[0045]
When the lens with lens barrel 28A is used for multiple purposes, the outer peripheral surface of the outer lens barrel 30 may be injection-molded into a circular shape without irregularities, and may be finished to a desired outer shape according to the application by post-processing. When the application is specified, it is desirable to perform injection molding in the outer lens barrel cavity having a desired outer shape. In particular, in the case of a molded article having an undercut, a split mold is used.
[0046]
FIGS. 8B and 8C show an embodiment in which the lens with lens barrel 28 is used as an insert part and the zoom lens parts 32 and 34 are manufactured. FIG. 8B shows a concave shape on the outer peripheral surface of the outer lens barrel 30. FIG. 8C shows a zoom lens component 32 having a spiral portion 33 formed on the outer peripheral surface of the outer lens barrel 30.
[0047]
Next, FIG. 9 shows a partially enlarged cross-sectional view of a mold apparatus 35 for injection molding according to another embodiment. In this embodiment, the outer lens barrel is simultaneously molded with a plastic lens without using secondary injection molding. The mold apparatus 35 has a structure in which a part of the mold side insert 10 and the core side insert 18 in the mold apparatus 3 of FIG. 3 is partially changed.
[0048]
That is, annular grooves 36A and 36B cut out at a fixed width are provided adjacent to the distal-side small-diameter portions of the cabinet pin 11 and the core pin 19 with respect to the distal-side inner peripheral surfaces of the mold-side nest 10 and the core-side nest 18, respectively. The lens barrel member 2 is mounted on the inner peripheral side between the outer peripheral surface of the lens and the annular grooves 36A and 36B, and the outer lens barrel cavity 36 is formed on the outer peripheral side by the annular grooves 36A and 36B.
[0049]
Thereby, when injection molding is performed with the molding resin material 25 in a state where the mold device 35 is clamped, the molding resin material 25 is filled into the lens cavity 23 formed inside and the outer lens barrel cavity 36 formed outside, As shown in FIG. 10A, a lens with a lens barrel 38 in which an outer lens barrel 37 integrated with the plastic lens 26 is formed on the outer peripheral surface of the lens barrel member 2 can be manufactured.
[0050]
When manufacturing the lens 38 with a lens barrel, the cylindrical member 1 is mounted in the outer lens barrel cavity 36 as in the case of the previous embodiment, and compression molded in the mold device 35 to form a ring-shaped bulge. The lens barrel member 2 shown in FIG. 1C in which the portion 2c and the annular concave groove 2d are formed can be formed, and the outer periphery of the outer lens barrel 37 is post-processed into a concave shape as shown in FIG. The spiral part 39 is formed, and the zoom lens component 40 can be manufactured.
[0051]
In this embodiment, as in the previous embodiment, the outer peripheral edge of the plastic lens 26 is locked and held by the annular concave groove 2d, and the outer lens barrel 37 is integrally molded at the same time and connected to the plastic lens 26. Therefore, the plastic lens 26 can be connected and held more firmly than in the case of the previous embodiment.
[0052]
The difference between the former embodiment shown in FIG. 8 and the latter embodiment shown in FIG. 10 is that in the former case, a synthetic resin material suitable for the plastic lens 26 and a synthetic resin material suitable for the outer lens barrel 30 are individually selected. In the latter case, it is necessary to use the same synthetic resin material as the plastic lens 26 for the outer lens barrel 37.
[Brief description of the drawings]
1A and 1B are structural members of a lens with a lens barrel according to an embodiment to which the present invention is applied, wherein FIG. 1A is a front view of a cylindrical member, FIG. 1B is a longitudinal sectional view of the same, and FIG. The longitudinal cross-sectional view of the lens barrel member with a part is each shown.
FIG. 2 is an overall vertical sectional view of a main part of a mold apparatus for manufacturing a lens with a lens barrel according to an embodiment to which the present invention is applied.
3 is a partially enlarged longitudinal sectional view of the vicinity of a mold division plane PL in a mold opened state of the mold apparatus of FIG. 2;
FIG. 4 shows a compression molding process of forming a lens barrel member by compression molding a cylindrical member using the mold apparatus of FIG. 2;
FIG. 5 shows an injection molding step of injection molding a plastic lens integrally with the lens barrel member using the mold apparatus of FIG. 2;
6 (a) is a longitudinal sectional view of the injection molded product knocked out, and FIG. 6 (b) is a longitudinal section of the lens with a lens barrel with unnecessary parts removed. The plan views are respectively shown.
FIG. 7 is a perspective view showing a use state of the lens with a lens barrel of FIG. 6;
8A and 8B show a zoom lens component using the lens with the lens barrel of FIG. 6, wherein FIG. 8A is a longitudinal sectional view of a molded product obtained by secondary processing of the outer lens barrel by injection molding, and FIG. FIG. 3C is a longitudinal sectional view of a zoom lens component having a concave spiral portion formed on a barrel, and FIG. 4C is a longitudinal sectional view of a zoom lens component having a convex spiral portion formed on an outer lens barrel.
FIG. 9 is a partially enlarged cross-sectional view of a mold apparatus for injection molding according to another embodiment to which the present invention is applied.
10A and 10B are zoom lens parts manufactured by using the mold apparatus of FIG. 9, in which FIG. 10A is a longitudinal sectional view of a molded article in which an outer lens barrel is simultaneously formed by injection molding, and FIG. The longitudinal sectional view of the zoom lens component which formed the concave spiral part in the trunk | drum is shown, respectively.
[Explanation of symbols]
Reference Signs List 1 cylindrical member 1a, 1b through hole 2 lens barrel member 2a inflow hole 2b outflow hole 2c bulging portion 2d annular concave groove 3, 35 mold device 3A fixed mold portion 3B movable mold portion 4 locate ring 5 fixed side Attachment plate 6 Fixed mold plate 7 Nozzle insertion hole 8 Spool 9 Spool bush 10 Cabinet insert 11 Cabi pin 12 Movable mold plate 13 Receiving plate 14 Spacer block 15 Movable mold plate 16 Ejector plate 17 Ejector pin 18 Core insert 19 Core pin 20 Runner 20A, 20B Slot 21 (for runner) Slug well 21A, 21B Slot 22 (for slug well) Insert groove 22A, 22B, 36A, 36B Annular groove 23 Lens cavity 23A, 23B Concave spherical surface 24 Deformation space 24A, 24B Arc-shaped notched surface 25 Molded resin material 26 Plastic Lens 27 Cold slug 28, 38 Lens with lens barrel 29 Mounting plate 29a Mounting holes 30, 37 Outer lens barrel 31, 39 (Concave) helical part 32, 34, 40 Zoom lens part 33 (Convex) helical part 36 Outside Lens cavity

Claims

A lens barrel member provided with an annular bulging portion on the outer periphery of the intermediate portion to form an annular groove on the inner peripheral surface, and a bulging portion provided with at least one or more through holes communicating the inside and the outside; A mirror formed by fitting an outer peripheral edge portion into the concave groove, projecting a part of the outer peripheral edge portion into the through hole, and integrally molding the plastic lens into the lens barrel member. Lens with body.

The lens with a lens barrel according to claim 1, wherein the lens barrel member is formed of a metal pipe.

3. The lens with a lens barrel according to claim 1, wherein an outer lens barrel formed by secondary injection molding with a molding resin material different from the plastic lens is provided on an outer periphery of the lens barrel member. 4.

The lens with a lens barrel according to claim 1, wherein an outer lens barrel is provided around the outer circumference of the lens barrel member by simultaneous injection molding with the same molding resin material as the plastic lens.

The lens with a lens barrel according to claim 3 or 4, wherein a spiral part is provided on an outer periphery of the outer lens barrel to form a zoom lens component.

A lens barrel member provided with an annular bulge on the outer periphery of the intermediate portion to form an annular concave groove on the inner peripheral surface, and having at least one or more through-holes communicating the inside and the outside of the bulge is a mold. Inserting into the apparatus, filling the molding resin material with the through hole as a gate for the lens cavity formed by the cavity pin and the core pin in the lens barrel member, and injecting a plastic lens into the lens barrel member. A method for manufacturing a lens with a lens barrel.

The lens barrel member is provided with a through hole communicating between the inside and the outside at an intermediate portion, and a cylindrical member made of a metal pipe longer than the lens barrel member is inserted into the mold apparatus, and compression molded with the cabine pin and the core pin. The method for manufacturing a lens with a lens barrel according to claim 6, wherein the bulging portion and the annular concave groove are formed by using the bulging portion.

The lens with the lens barrel is inserted into a mold device for secondary processing, and the outer lens barrel is formed of a molding resin material different from the plastic lens with respect to the outer lens barrel cavity formed on the outer periphery of the lens barrel member. The method for producing a lens with a lens barrel according to claim 6, wherein the lens is subjected to secondary injection molding.

A lens barrel member provided with an annular bulge on the outer periphery of the intermediate portion to form an annular concave groove on the inner peripheral surface, and having at least one or more through-holes communicating the inside and the outside of the bulge is a mold. The lens cavity formed by the cavity pin and the core pin in the lens barrel member is filled with a molding resin material by using the through hole as a gate, and at the same time, the outer lens barrel cavity formed on the outer periphery of the lens barrel member is formed. A plastic lens molded in the lens barrel member and an outer lens barrel molded on the outer periphery of the lens barrel member are connected by a molded resin material filled in the through hole. A method for manufacturing a lens with a lens barrel.