JP3459128B2 - Method of forming lens barrel and lens barrel - Google Patents
Method of forming lens barrel and lens barrelInfo
- Publication number
- JP3459128B2 JP3459128B2 JP00547395A JP547395A JP3459128B2 JP 3459128 B2 JP3459128 B2 JP 3459128B2 JP 00547395 A JP00547395 A JP 00547395A JP 547395 A JP547395 A JP 547395A JP 3459128 B2 JP3459128 B2 JP 3459128B2
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- cavity
- injected
- gate
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lens Barrels (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はレンズ鏡胴の成形方法及
びレンズ鏡胴に係り、特に樹脂材料を使用して射出成形
により高精度のレンズ鏡胴を得るためのレンズ鏡胴の成
形方法及びレンズ鏡胴に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel forming method and a lens barrel, and more particularly to a lens barrel forming method for obtaining a highly accurate lens barrel by injection molding using a resin material. It relates to a lens barrel.
【０００２】[0002]
【従来の技術】ビデオカメラ用レンズ、プロジェクター
用レンズ、または軽量の小型カメラなどにおいて、光軸
に対する傾きなどを防止する所定の精度を備えることが
必要となるレンズ鏡胴は、特にその外径精度の確保をす
ることが絶対条件であり、従来より金属筒状のものを旋
盤加工して高精度に仕上げるようにしている。2. Description of the Related Art A lens barrel for a video camera lens, a projector lens, a lightweight small camera, or the like, which is required to have a predetermined precision for preventing tilting with respect to an optical axis, has a particularly large outer diameter precision. It is an absolute requirement to ensure that the metal cylinders have been lathe-processed to achieve high precision.
【０００３】一方、近年になり、樹脂材料素材の進歩は
目覚ましく樹脂材料を用いても所望の精度と機械的強度
が得られるエンジニアリングプラスチック使用の成形品
が得られるようになり、種々の機構部品に適用されれて
いる。そこで、従来の金属の挽き物に代えたレンズ鏡胴
を樹脂を使用して射出成形することで、大幅なコストダ
ウンを図ることが提案されている。このような、樹脂製
のレンズ鏡胴は、機械的強度とラジアル、スラスト方向
の寸法精度が要求される。On the other hand, in recent years, the progress of resin material has been remarkable, and even if a resin material is used, a molded product using an engineering plastic which can obtain desired precision and mechanical strength can be obtained, and various mechanical parts can be obtained. Has been applied. Therefore, it has been proposed to significantly reduce costs by injection-molding a lens barrel instead of a conventional metal ground product using resin. Such a resin lens barrel is required to have mechanical strength and radial and thrust dimensional accuracy.
【０００４】図５は従来の射出成形装置において、レン
ズ鏡胴を樹脂射出成形する際のレンズ鏡胴１００に注入
される溶融樹脂の流れる様子を夫々示した（ａ）外観斜
視図と（ｂ）中心断面図である。本図に示されるよう
に、従来よりレンズ鏡胴の環状端面１０５に対向する部
位において図中の一点鎖線で示されるように等間隔に配
設される複数のゲートＧを介して溶融樹脂材料をキャビ
ティ中に注入して、他端面１０６まで樹脂が到達して充
満するようにして完成品を得ていた。FIG. 5 is a perspective view showing the appearance of molten resin injected into the lens barrel 100 when resin-molding the lens barrel in a conventional injection molding apparatus. It is a central cross-sectional view. As shown in this figure, a molten resin material is conventionally provided through a plurality of gates G arranged at equal intervals as shown by the alternate long and short dash line in the portion of the lens barrel facing the annular end surface 105. A finished product was obtained by injecting the resin into the cavity so that the resin reaches the other end surface 106 and is filled therewith.
【０００５】[0005]
【発明が解決しようとする課題】以上のようにしていた
ために、図６の溶融樹脂の流れる様子を夫々示した外観
斜視図に示されるように、ゲートＧを通過した溶融樹脂
Ｊは略紐状になり所定速度を持って他端面１０６にぶつ
かり図示のような蛇行状に重なり会いながら次第に硬化
を初める。同様に他のゲートＧから注入された溶融樹脂
Ｊも図７に示されるように所定速度を持って他端面１０
６にぶつかるようにして蛇行状に重なり会いながらキャ
ビティ内を充満することになる。As described above, the molten resin J passing through the gate G has a substantially string-like shape as shown in the external perspective views of FIG. 6 showing the flowing states of the molten resin. Then, the other end surface 106 is collided with a predetermined speed, and the curing is gradually started while overlapping in a meandering shape as shown in the drawing. Similarly, the molten resin J injected from the other gate G also has a predetermined speed as shown in FIG.
The inside of the cavity is filled while hitting 6 and overlapping in a meandering shape.
【０００６】この結果、成形条件如何では各ゲートＧを
介して注入された溶融樹脂Ｊ同士の間のウエルドライン
等が発生したり、または疎密のバラツキが発生するので
局部的な寸法差が発生してしまい、レンズ鏡胴において
必要となる機械的強度とラジアル、スラスト方向の寸法
精度が確保できない問題点が指摘されており、溶融樹脂
温度、樹脂注入時間や冷却時間他の成形条件の管理を厳
密に制御するなどして対処している。As a result, a weld line or the like is generated between the molten resins J injected through the respective gates G, or unevenness in density occurs depending on the molding conditions, so that a local dimensional difference occurs. It has been pointed out that the mechanical strength and dimensional accuracy in the radial and thrust directions required for the lens barrel cannot be ensured.Therefore, strict control of molten resin temperature, resin injection time, cooling time and other molding conditions is required. I am dealing with it by controlling to.
【０００７】一方、図８の溶融樹脂の流れる様子を示し
た外観斜視図に示されるように、レンズ鏡胴１００の環
状端面１０５において内周側に延設した形状部１０１を
設けておき、この形状部１０１に対してゲートＧを図示
のように配設して、溶融樹脂Ｊの注入方向を略９０度分
変化させてからキャビティ内を充満するこの方法によれ
ば、上記のように略紐状になって注入されることは緩和
されて良い結果を得ることができるが、内周側に延設し
た形状部１０１が必要となることから、レンズ鏡胴に適
さない形状になる場合がある。On the other hand, as shown in the external perspective view showing the flow of the molten resin in FIG. 8, a shape portion 101 extending to the inner peripheral side is provided on the annular end surface 105 of the lens barrel 100, and By arranging the gate G with respect to the shape portion 101 as shown in the figure and changing the injection direction of the molten resin J by about 90 degrees and then filling the inside of the cavity, according to this method, as described above, Although it is possible to obtain a good result by relaxing the injection in the form of a shape, the shape portion 101 extending to the inner peripheral side is required, and therefore the shape may not be suitable for the lens barrel in some cases. .
【０００８】したがって、本発明は上述の問題点に鑑み
てなされたものであり、射出成形における成形条件を特
にシビアに設定しなくとも、レンズ鏡胴に必要となる機
械的強度とラジアル、スラスト方向の寸法精度の確保が
できるレンズ鏡胴の成形方法及びレンズ鏡胴の提供を目
的とする。Therefore, the present invention has been made in view of the above-mentioned problems, and the mechanical strength, the radial direction, and the thrust direction required for the lens barrel need not be set even if the molding conditions in injection molding are not set severely. It is an object of the present invention to provide a lens barrel molding method and a lens barrel that can ensure the dimensional accuracy of the lens barrel.
【０００９】[0009]
【課題を解決するための手段】及び[Means for Solving the Problems] and
【作用】上記の課題を解決し、目的を達成するために本
発明は、内径及び外径の寸法精度を確保するレンズ鏡胴
の成形方法であって、前記レンズ鏡胴の一端の環状端面
に対向する部位において等間隔に配設される複数のゲー
トを介して溶融樹脂材料をキャビティ中に注入し、キャ
ビティ内部における前記ゲートの近傍で且つ当該ゲート
に対向する部位に設けられた形状部に注入樹脂を衝突さ
せ、当該キャビティ内部で分流することで塊状となって
前記レンズ鏡胴の他端面に向かってキャビティ内に充満
させることを特徴とする。In order to solve the above problems and to achieve the object, the present invention is a method for molding a lens barrel which secures dimensional accuracy of an inner diameter and an outer diameter, wherein an annular end surface at one end of the lens barrel is provided. in a portion facing through a plurality of gates disposed at equal intervals by injecting molten resin material into the cavity, calibration
In the vicinity of the gate inside the bite and the gate
If the injected resin collides with the shape provided on the
Then, by dividing the flow inside the cavity, it becomes a lump.
The cavity is filled toward the other end surface of the lens barrel.
It is characterized by
【００１０】[0010]
【００１１】また、内径及び外径の寸法精度を確保した
レンズ鏡胴であって、前記レンズ鏡胴の一端の環状端面
に対向する部位において等間隔に配設される複数のゲー
トを介して溶融樹脂材料をキャビティ中に注入し、キャ
ビティ内部における前記ゲートの近傍で且つ当該ゲート
に対向する部位に設けられた形状部に注入樹脂を衝突さ
せ、当該キャビティ内部で分流することで塊状となって
前記レンズ鏡胴の他端面に向かってキャビティ内に充満
させて得られることを特徴とする。Further, in the lens barrel which secures the dimensional accuracy of the inner diameter and the outer diameter, the lens barrel is melted through a plurality of gates arranged at equal intervals at a portion facing the annular end face at one end of the lens barrel. the resin material is injected into the cavity, calibration
In the vicinity of the gate inside the bite and the gate
If the injected resin collides with the shape provided on the
Then, by dividing the flow inside the cavity, it becomes a lump.
The cavity is filled toward the other end surface of the lens barrel.
It is characterized by being obtained .
【００１２】[0012]
【実施例】以下に本発明の好適な実施例に付き添付図面
を参照して説明すると、図１は第１実施例の射出成形装
置において、レンズ鏡胴を樹脂射出成形する際のレンズ
鏡胴１に注入される溶融樹脂の流れる様子を夫々示した
（ａ）外観斜視図と（ｂ）中心断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a lens barrel for resin injection molding of the lens barrel in the injection molding apparatus of the first embodiment. 1A is an external perspective view and FIG. 1B is a center cross-sectional view showing the flowing state of the molten resin injected into the nozzle 1.
【００１３】図１（ａ）、（ｂ）に示されるように、レ
ンズ鏡胴の環状端面５に対向する部位において図中の一
点鎖線で示されるように等間隔の９０度おきに配設され
る４個のゲートＧを介して溶融樹脂材料Ｊをキャビティ
中に注入して、他端面６まで樹脂が到達して充満するよ
うにして完成品を得るものである。このように配設され
る各ピンゲートＧの対向部位には製品側において孔部と
なり、キャビティ側において凸部となる形状部２であっ
て図示のように略四角形状の部分が夫々設けられてい
る。As shown in FIGS. 1 (a) and 1 (b), the portions facing the annular end surface 5 of the lens barrel are arranged at regular intervals of 90 degrees as indicated by the alternate long and short dash line in the figure. The molten resin material J is injected into the cavity through the four gates G so that the resin reaches the other end surface 6 and is filled therewith to obtain a finished product. At the facing portions of the pin gates G arranged in this way, there are provided, respectively, shaped portions 2 which are holes on the product side and convex on the cavity side, and which are substantially quadrangular as shown in the figure. .
【００１４】以上の構成において、ピンゲートＧを介し
て注入された樹脂が最初に各形状部２に対して衝突し
て、図示のように左右に分岐することから、従来のよう
に略紐状になってキャビティ内に注入されることが防止
されて、図２の溶融樹脂の流れる様子を示した外観斜視
図に示されるように、ピンゲートＧを通過した溶融樹脂
Ｊは塊となって他端面６に向かい、キャビティ内を充満
した状態にしてから次第に硬化を初めることになる。同
様に他のピンゲートＧから注入された溶融樹脂Ｊも図２
に示されるように塊状態を保持して他端面６に到達して
キャビティ内を充満することになる。In the above structure, the resin injected through the pin gate G first collides with each shape portion 2 and branches left and right as shown in the figure, so that it is formed into a substantially string-like shape as in the conventional case. As a result, the molten resin J that has passed through the pin gate G becomes a lump and is prevented from being injected into the cavity, as shown in the external perspective view of the molten resin flowing in FIG. Then, after the cavity is filled, the curing is gradually started. Similarly, the molten resin J injected from another pin gate G is also shown in FIG.
As shown in (3), the lump state is maintained and the other end surface 6 is reached to fill the inside of the cavity.
【００１５】この結果、図３に図示のように、各ゲート
Ｇを介して注入された溶融樹脂Ｊ同士の間のウエルドラ
インＷＬ等はレンズ鏡胴の長手方向に沿うように形成さ
れることになり、疎密のバラツキ発生が防止されるよう
になり、レンズ鏡胴の局部的な寸法差の発生が防止され
る。この結果、レンズ鏡胴において必要となる機械的強
度とラジアル、スラスト方向の寸法精度が確保できるよ
うになる。As a result, as shown in FIG. 3, the weld lines WL and the like between the molten resins J injected through the gates G are formed along the longitudinal direction of the lens barrel. As a result, unevenness in density is prevented from occurring and a local dimensional difference in the lens barrel is prevented from occurring. As a result, the mechanical strength and the radial and thrust dimensional accuracy required for the lens barrel can be secured.
【００１６】このために、溶融樹脂温度、樹脂注入時間
や冷却時間他の成形条件の管理を厳密には必ずしも制御
する必要がなくなる。次に、図４は第２実施例になる射
出成形装置において、レンズ鏡胴を樹脂射出成形する際
のレンズ鏡胴１に注入される溶融樹脂の流れる様子を夫
々示した（ａ）外観斜視図と（ｂ）中心断面図である。Therefore, it is not necessary to strictly control the management of the molten resin temperature, the resin injection time, the cooling time, and other molding conditions. Next, FIG. 4 is a perspective view showing the appearance of the molten resin injected into the lens barrel 1 when resin-molding the lens barrel in the injection molding apparatus according to the second embodiment. And (b) is a central sectional view.
【００１７】本図において、レンズ鏡胴１の環状端面５
の縁部から９０度の等間隔で外周方向に延設される４個
のサイドゲートＧを介して溶融樹脂材料Ｊを内径に向け
て注入し、注入した溶融樹脂をレンズ鏡胴の長手方向の
直角方向に転換させてキャビティ内に充満するようにし
ている。以上のように成形して、レンズ鏡胴に適した形
状を得ることができる。In the figure, an annular end surface 5 of the lens barrel 1 is shown.
The molten resin material J is injected toward the inner diameter through four side gates G extending in the outer circumferential direction at equal intervals of 90 degrees from the edge of the lens barrel, and the injected molten resin is applied in the longitudinal direction of the lens barrel. It is converted to a right angle to fill the cavity. By molding as described above, a shape suitable for the lens barrel can be obtained.
【００１８】[0018]
【発明の効果】以上のように、本発明によれば、射出成
形における成形条件を特にシビアに設定しなくとも、レ
ンズ鏡胴に必要となる機械的強度とラジアル、スラスト
方向の寸法精度の確保ができるレンズ鏡胴の成形方法及
びレンズ鏡胴を提供することができる。As described above, according to the present invention, the mechanical strength required for the lens barrel and the dimensional accuracy in the radial and thrust directions can be ensured even if the molding conditions in injection molding are not set severely. It is possible to provide a lens barrel molding method and a lens barrel that can perform the above.
【図１】本発明の第１実施例の射出成形装置において、
レンズ鏡胴を樹脂射出成形する際のレンズ鏡胴１に注入
される溶融樹脂の流れる様子を夫々示した（ａ）外観斜
視図と（ｂ）中心断面図である。FIG. 1 shows an injection molding apparatus according to a first embodiment of the present invention,
FIG. 6A is an external perspective view and FIG. 8B is a central cross-sectional view showing how molten resin injected into the lens barrel 1 flows when the lens barrel is injection-molded with resin.
【図２】図１の射出成形装置における動作説明の外観斜
視図である。2 is an external perspective view for explaining the operation of the injection molding apparatus of FIG.
【図３】図１の射出成形装置における動作説明の外観斜
視図である。3 is an external perspective view for explaining the operation of the injection molding apparatus of FIG.
【図４】第２実施例の射出成形装置において、レンズ鏡
胴を樹脂射出成形する際のレンズ鏡胴１に注入される溶
融樹脂の流れる様子を夫々示した（ａ）外観斜視図と
（ｂ）中心断面図である。FIG. 4 (a) is an external perspective view showing the flow of molten resin injected into the lens barrel 1 during resin injection molding of the lens barrel in the injection molding apparatus of the second embodiment. ) A central sectional view.
【図５】従来の射出成形装置における溶融樹脂の流れる
様子を夫々示した（ａ）外観斜視図と（ｂ）中心断面図
である。5 (a) is an external perspective view and FIG. 5 (b) is a central cross-sectional view showing how a molten resin flows in a conventional injection molding apparatus.
【図６】図５の射出成形装置における動作説明の外観斜
視図である。6 is an external perspective view for explaining the operation of the injection molding apparatus of FIG.
【図７】図５の射出成形装置における動作説明の外観斜
視図である。7 is an external perspective view for explaining the operation of the injection molding apparatus of FIG.
【図８】従来の射出成形装置における溶融樹脂の流れる
様子を夫々示した（ａ）外観斜視図と（ｂ）中心断面図
である。8 (a) is an external perspective view and FIG. 8 (b) is a central cross-sectional view showing how a molten resin flows in a conventional injection molding apparatus.
１…レンズ鏡胴 ２…形状部 ３…内周面 ４…外周面 ５…環状端面 Ｇ…ゲート Ｊ…溶融樹脂材 1 ... Lens barrel 2 ... Shape 3 ... Inner surface 4 ... Outer peripheral surface 5 ... Annular end face G ... Gate J: Molten resin material
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−238711（ＪＰ，Ａ) 特開 平４−301420（ＪＰ，Ａ) 特開 平５−185470（ＪＰ，Ａ) 特開 平３−159713（ＪＰ，Ａ) 特開 昭61−92819（ＪＰ，Ａ) 特開 昭58−158232（ＪＰ，Ａ) 特開 昭58−131042（ＪＰ，Ａ) 特開 昭61−110522（ＪＰ，Ａ) 実開 平３−93114（ＪＰ，Ｕ) 実開 昭54−65963（ＪＰ，Ｕ) 実開 昭59−61923（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 - 7/16 B29C 33/00 - 33/76 B29C 39/26 - 39/36 B29C 41/38 - 41/44 B29C 43/36 - 43/42 B29C 43/50 B29C 45/26 - 45/44 B29C 45/64 - 45/68 B29C 45/73 B29C 49/48 - 49/56 B29C 49/70 B29C 51/30 - 51/40 B29C 51/44 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-238711 (JP, A) JP-A-4-301420 (JP, A) JP-A-5-185470 (JP, A) JP-A-3- 159713 (JP, A) JP 61-92819 (JP, A) JP 58-158232 (JP, A) JP 58-131042 (JP, A) JP 61-110522 (JP, A) Actually open 3-93114 (JP, U) Actually open 54-65963 (JP, U) Actually open 59-61923 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G02B 7/02-7/16 B29C 33/00-33/76 B29C 39/26-39/36 B29C 41/38-41/44 B29C 43/36-43/42 B29C 43/50 B29C 45/26-45 / 44 B29C 45/64-45/68 B29C 45/73 B29C 49/48-49/56 B29C 49/70 B29C 51/30-51/40 B29C 51/44
Claims (3)
ズ鏡胴の成形方法であって、 前記レンズ鏡胴の一端の環状端面に対向する部位におい
て等間隔に配設される複数のゲートを介して溶融樹脂材
料をキャビティ中に注入し、キャビティ内部における前
記ゲートの近傍で且つ当該ゲートに対向する部位に設け
られた形状部に注入樹脂を衝突させ、当該キャビティ内
部で分流することで塊状となって前記レンズ鏡胴の他端
面に向かってキャビティ内に充満させることを特徴とす
るレンズ鏡胴の成形方法。1. A method of molding a lens barrel for ensuring dimensional accuracy of an inner diameter and an outer diameter, comprising: a plurality of gates arranged at equal intervals at a portion facing an annular end surface at one end of the lens barrel. The molten resin material is injected into the cavity through the cavity , and the injected resin is made to collide with a shape portion provided inside the cavity in the vicinity of the gate and at a portion facing the gate, and the inside of the cavity is injected .
The other end of the lens barrel becomes a lump by splitting at a part
A method for molding a lens barrel, characterized in that the cavity is filled toward the surface .
なり、前記キャビティ内部では凸部となることを特徴と
する請求項１に記載のレンズ鏡胴の成形方法。 2. The shape portion is a hole as a product shape.
And has a convex portion inside the cavity.
The method for forming a lens barrel according to claim 1, wherein
ズ鏡胴であって、 前記レンズ鏡胴の一端の環状端面に対向する部位におい
て等間隔に配設される複数のゲートを介して溶融樹脂材
料をキャビティ中に注入し、キャビティ内部における前
記ゲートの近傍で且つ当該ゲートに対向する部位に設け
られた形状部に注入樹脂を衝突させ、当該キャビティ内
部で分流することで塊状となって前記レンズ鏡胴の他端
面に向かってキャビティ内に充満させて得られることを
特徴とするレンズ鏡胴。3. A lens barrel which secures dimensional accuracy of an inner diameter and an outer diameter, and is melted through a plurality of gates arranged at equal intervals at a portion facing the annular end face at one end of the lens barrel. A resin material is injected into the cavity , and the injected resin is made to collide with a shape portion provided inside the cavity in the vicinity of the gate and at a portion facing the gate .
The other end of the lens barrel becomes a lump by splitting at a part
A lens barrel characterized by being obtained by filling a cavity toward a surface .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00547395A JP3459128B2 (en) | 1995-01-18 | 1995-01-18 | Method of forming lens barrel and lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00547395A JP3459128B2 (en) | 1995-01-18 | 1995-01-18 | Method of forming lens barrel and lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08194146A JPH08194146A (en) | 1996-07-30 |
| JP3459128B2 true JP3459128B2 (en) | 2003-10-20 |
Family
ID=11612224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00547395A Expired - Fee Related JP3459128B2 (en) | 1995-01-18 | 1995-01-18 | Method of forming lens barrel and lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3459128B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020258332A1 (en) * | 2019-06-28 | 2020-12-30 | 瑞声光学解决方案私人有限公司 | Lens assembly |
| US11815731B2 (en) | 2020-02-12 | 2023-11-14 | Largan Precision Co., Ltd. | Imaging lens system, camera module and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6710945B1 (en) | 2002-06-03 | 2004-03-23 | Amkor Technology, Inc. | Injection molded lens-barrel assembly and method for fabricating lens-barrel and mount assemblies |
| JP5049605B2 (en) * | 2007-01-29 | 2012-10-17 | パナソニック株式会社 | Cylindrical molded products, lens barrels, cameras and injection molds |
| JP4948190B2 (en) * | 2007-01-31 | 2012-06-06 | パナソニック株式会社 | Plastic molded products and optical equipment |
| JP2011141945A (en) * | 2011-02-21 | 2011-07-21 | Olympus Corp | Optical element for optical pickup |
| US9019637B2 (en) * | 2012-11-13 | 2015-04-28 | Largan Precision Co., Ltd. | Plastic lens barrel and method for manufacturing the same |
| CN103009022B (en) * | 2012-11-29 | 2015-05-20 | 中山联合光电科技有限公司 | Optical plastic product mould core machining technology |
| TWI625563B (en) | 2017-03-23 | 2018-06-01 | 大立光電股份有限公司 | Plastic barrel, camera module and electronic device |
| TWI650586B (en) | 2018-07-12 | 2019-02-11 | 大陽科技股份有限公司 | Plastic lens barrel, auto focus module and electronic device |
| TWI672538B (en) | 2018-09-12 | 2019-09-21 | 大陽科技股份有限公司 | Camera module and electronic device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5465963U (en) * | 1977-10-19 | 1979-05-10 | ||
| JPS58131042A (en) * | 1982-01-29 | 1983-08-04 | Sony Corp | Molding method by ring gate |
| JPS58158232A (en) * | 1982-03-15 | 1983-09-20 | Sony Corp | Molding method using ring gate |
| JPS6013623Y2 (en) * | 1982-10-19 | 1985-05-01 | 株式会社太洋工作所 | injection mold |
| JPS6192819A (en) * | 1984-10-12 | 1986-05-10 | Denki Kagaku Kogyo Kk | Injection molding die |
| JPS61110522A (en) * | 1984-11-06 | 1986-05-28 | Olympus Optical Co Ltd | Hollow and cylindrical molding frame body |
| JPH03159713A (en) * | 1989-11-17 | 1991-07-09 | Olympus Optical Co Ltd | Method and die for injection molding of precision component |
| JPH0393114U (en) * | 1990-01-12 | 1991-09-24 | ||
| JPH04301420A (en) * | 1991-03-29 | 1992-10-26 | Fujitsu Ltd | Molding method for bottomed cylindrical component |
| JP3225974B2 (en) * | 1992-01-09 | 2001-11-05 | 株式会社デンソー | Mold for injection molding |
| JPH06238711A (en) * | 1993-02-12 | 1994-08-30 | Olympus Optical Co Ltd | Injection molding method and device for plastic |
-
1995
- 1995-01-18 JP JP00547395A patent/JP3459128B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020258332A1 (en) * | 2019-06-28 | 2020-12-30 | 瑞声光学解决方案私人有限公司 | Lens assembly |
| US11815731B2 (en) | 2020-02-12 | 2023-11-14 | Largan Precision Co., Ltd. | Imaging lens system, camera module and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08194146A (en) | 1996-07-30 |
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