JPH07159663A - Lens holding device - Google Patents
Lens holding deviceInfo
- Publication number
- JPH07159663A JPH07159663A JP5340607A JP34060793A JPH07159663A JP H07159663 A JPH07159663 A JP H07159663A JP 5340607 A JP5340607 A JP 5340607A JP 34060793 A JP34060793 A JP 34060793A JP H07159663 A JPH07159663 A JP H07159663A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- peripheral surface
- adhesive
- outer peripheral
- lens barrel
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプラスチックからなるレ
ンズを鏡筒内に保持するレンズ保持装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens holding device for holding a plastic lens in a lens barrel.
【０００２】[0002]
【従来の技術】ガラスやプラスチックからなるレンズを
鏡筒に実装する場合には、レンズの光軸と鏡筒の軸心を
高精度に一致させる必要があり、従来では特開平４−１
６６９０４号公報に記載されたレンズ保持装置が開発さ
れている。このレンズ保持装置はレンズが嵌め込まれる
鏡筒をプラスチックで形成し、この鏡筒の内周面の略３
等分位置に突起部を設けている。この突起部は突起部を
結ぶ内接円の径をレンズの外径と略一致させると共に、
内接円の中心がレンズの光軸と一致するように鏡筒の内
部に形成されている。かかる突起部にレンズの外周面を
嵌め込むことにより、レンズの光軸と鏡筒の軸心とが一
致するため、レンズ外周と鏡筒との間に接着剤を供給す
ることによりレンズを高精度に固定することができる。2. Description of the Related Art When a lens made of glass or plastic is mounted on a lens barrel, it is necessary to align the optical axis of the lens with the axis of the lens barrel with high accuracy.
The lens holding device described in Japanese Patent No. 66904 has been developed. In this lens holding device, the lens barrel into which the lens is fitted is formed of plastic, and the inner peripheral surface of the lens barrel is approximately three.
Protrusions are provided at equal positions. This protrusion makes the diameter of the inscribed circle connecting the protrusions approximately the same as the outer diameter of the lens, and
It is formed inside the lens barrel so that the center of the inscribed circle coincides with the optical axis of the lens. By fitting the outer peripheral surface of the lens in such a protrusion, the optical axis of the lens and the axis of the lens barrel are aligned, so that by supplying an adhesive between the lens outer periphery and the lens barrel, the lens can be highly accurate. Can be fixed to.
【０００３】ところで近年、ガラスレンズに替えてプラ
スチックレンズが多用されている。このプラスチックレ
ンズは例えば、射出成形機によって成形されるが、成形
に際してランナー部やゲート部（以下、ゲート部と記す
る。）がレンズと一体的に形成されるため、これらを除
去する必要がある。図１１はこれらのゲート部を除去す
るプラスチックレンズ１００を示す。レンズ１００には
ゲート部１１０が一体的に突出して形成されており、こ
のゲート部１１０を除去するため、切断線１２０でカッ
ティングしている。かかるカッティングはレンズ１００
の外周面の一部を同時に切断するように行われ、これに
より円形状の外形の一部分が削除されてゲート部１１０
を完全に除去したレンズとなる。By the way, in recent years, plastic lenses have been widely used instead of glass lenses. This plastic lens is molded by, for example, an injection molding machine, but it is necessary to remove these because the runner portion and the gate portion (hereinafter referred to as the gate portion) are integrally formed with the lens at the time of molding. . FIG. 11 shows a plastic lens 100 that removes these gate portions. A gate portion 110 is integrally formed on the lens 100 so as to project, and a cutting line 120 is used for cutting in order to remove the gate portion 110. Such cutting is performed by the lens 100.
It is performed so that a part of the outer peripheral surface of the gate part 110 is cut at the same time.
The lens will be completely removed.
【０００４】このようにゲート部を除去したプラスチッ
クレンズ１００においても、前述した鏡筒内に嵌め込
み、レンズの外周面と鏡筒の内周面との間に接着剤を供
給することにより、レンズを固定している。この場合、
従来のレンズ保持装置では、２００ポアズ程度の低粘度
のシリコン系接着剤が使用されるものである。Even in the plastic lens 100 with the gate portion removed in this way, the lens is fitted into the lens barrel described above and an adhesive is supplied between the outer peripheral surface of the lens and the inner peripheral surface of the lens barrel. It is fixed. in this case,
A conventional lens holding device uses a low viscosity silicone adhesive of about 200 poise.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来技術で
は、図１１に示す外形の一部が削除された切欠部分を有
するプラスチックレンズを鏡筒内に挿入する場合、レン
ズの切欠部分と鏡筒の突起部とが対向することがある。
この対向により、レンズの切欠部分と鏡筒の突起部との
間に隙間が生じるため、レンズが鏡筒内で移動する。こ
のためレンズの光軸と鏡筒の軸心とがずれて、高精度の
固定ができない問題があった。In the above-mentioned prior art, when a plastic lens having a notched portion with a part of the outer shape shown in FIG. 11 is inserted into the lens barrel, the notched portion of the lens and the lens barrel are The protrusion may face each other.
Due to this facing, a gap is created between the notched portion of the lens and the protrusion of the lens barrel, so that the lens moves within the lens barrel. Therefore, there is a problem that the optical axis of the lens and the axis of the lens barrel are deviated from each other, and the lens cannot be fixed with high precision.
【０００６】また上述したレンズの外周面の切欠部分と
鏡筒の内周面との間に供給された接着剤は、これの間の
隙間に吸収されて確実な接着力を作用させることができ
ず、接着力が低下する。特に、２００ポアズ程度の低粘
度のシリコン系接着剤の場合には、流動し易く、レンズ
の切欠部分と鏡筒の内周面の間の隙間部分は他の接着部
位よりも接着面積が減じて、接着力が著しく低下してい
た。Further, the adhesive supplied between the notched portion on the outer peripheral surface of the lens and the inner peripheral surface of the lens barrel is absorbed in the gap between them to exert a reliable adhesive force. However, the adhesive strength is reduced. In particular, in the case of a low viscosity silicone adhesive of about 200 poise, it easily flows and the gap between the notch portion of the lens and the inner peripheral surface of the lens barrel has a smaller adhesive area than other adhesive portions. , The adhesive strength was significantly reduced.
【０００７】さらに、レンズの外周面と鏡筒内の突起部
とが良好に接触し、突起部や突起部間あるいはレンズ外
周の全域に接着剤を供給した場合においても、レンズの
外周面と鏡筒内周面との隙間が０．０５〜０．１ｍｍ程
度であり、接着剤層の厚さが極めて薄くなっている。こ
のため、このレンズ保持装置を装着したカメラやビデオ
などの光学機器のヒートサイクル試験等においては、接
着剤が温度変化や吸湿に対して十分な緩衝力を有してお
らず、レンズに歪が発生し易い不都合があり、加えて、
光学機器が落下したときの衝撃により、レンズが鏡筒か
ら外れる問題があった。Further, even when the outer peripheral surface of the lens is in good contact with the projection in the lens barrel and the adhesive is supplied between the projections or between the projections or the entire area of the lens outer circumference, the outer peripheral surface of the lens and the mirror The gap between the inner peripheral surface of the cylinder and the inner peripheral surface is about 0.05 to 0.1 mm, and the thickness of the adhesive layer is extremely thin. Therefore, in a heat cycle test of an optical device such as a camera or a video equipped with this lens holding device, the adhesive does not have a sufficient buffering force against temperature change or moisture absorption, and the lens is distorted. In addition to the inconvenience that tends to occur,
There is a problem that the lens comes off the lens barrel due to the impact when the optical device is dropped.
【０００８】本発明は、上記事情を考慮しなされたもの
であり、プラスチックからなるレンズを鏡筒内に高精度
に保持でき、しかもレンズに歪を発生させることがない
と共に、強固に固定することが可能なレンズ保持装置を
提供することを目的とする。The present invention has been made in consideration of the above circumstances, and it is possible to hold a plastic lens in a lens barrel with high accuracy, and to prevent the lens from being distorted and to firmly fix the lens. It is an object of the present invention to provide a lens holding device capable of
【０００９】[0009]
【課題を解決するための手段および作用】本発明のレン
ズ保持装置は、外周面における光軸方向の一側にゲート
残り部を突出状態で有し、他側が径方向の位置決め面と
なるプラスチックで成形されたレンズと、その内接円が
レンズの外径と略同一径でしかも内接円の中心がレンズ
の光軸と一致してレンズの他側の外周面が嵌合する突出
部が円周面の少なくとも３等分位置に形成された筒部
と、前記ゲート残り部と干渉しない径寸法を有しレンズ
の一側に対向する内周面の全域に形成された大径部とを
有する鏡筒と、この鏡筒の大径部とレンズの一側の外周
面との間に供給された接着剤とを備えていることを特徴
とする。The lens holding device of the present invention is made of plastic having a gate remaining portion in a protruding state on one side in the optical axis direction on the outer peripheral surface and a radial positioning surface on the other side. The molded lens has a circle whose inscribed circle is approximately the same diameter as the lens outer diameter, and the center of the inscribed circle coincides with the optical axis of the lens so that the outer peripheral surface on the other side of the lens fits into a circle. A cylindrical portion formed at least at three equal positions on the peripheral surface, and a large diameter portion having a diameter dimension that does not interfere with the remaining gate portion and formed over the entire inner peripheral surface facing one side of the lens. It is characterized by comprising a lens barrel and an adhesive supplied between the large diameter portion of the lens barrel and the outer peripheral surface on one side of the lens.
【００１０】上記構成では、レンズのゲート残り部と干
渉しない径寸法を有した大径部が鏡筒に形成されている
ため、ゲート残り部と鏡筒の突起部とが干渉することな
くレンズを鏡筒内に挿入することができる。この挿入に
より、鏡筒の突起部がレンズの外周面に嵌合してレンズ
の光軸と鏡筒の軸心とが一致する。これにより、レンズ
を高精度に位置決めできる。また接着剤は、ゲート残り
部を有するレンズの一側の外周面と鏡筒の大径部との間
に供給されるため、接着面積が増大すると共に、厚い接
着剤層とすることができ、強固な固定および温度変化や
吸湿に対する大きな緩衝力を有した接着が可能となる。In the above structure, since the large diameter portion having the diameter dimension which does not interfere with the remaining gate portion of the lens is formed on the lens barrel, the lens remaining portion and the projection portion of the lens barrel do not interfere with each other, so that the lens can be removed. It can be inserted into the lens barrel. By this insertion, the projection of the lens barrel is fitted to the outer peripheral surface of the lens, and the optical axis of the lens and the axis of the lens barrel are aligned. This allows the lens to be positioned with high accuracy. Further, since the adhesive is supplied between the outer peripheral surface on one side of the lens having the remaining gate portion and the large diameter portion of the lens barrel, the adhesive area is increased and a thick adhesive layer can be formed. It enables firm fixation and bonding with a great buffering force against temperature changes and moisture absorption.
【００１１】[0011]
【実施例１】図１ないし図５は本発明の実施例１を示
す。本発明におけるレンズは、射出成形等されたプラス
チックからなり、成形直後においては、図１に示す形状
となっている。図１において、１はプラスチックからな
るレンズであり、円形状に成形されている。このレンズ
１は成形時にゲート部２が一体となって形成されてお
り、このゲート部２を切断により除去する。この切断に
おいてはレンズ１を切断することなく、切断線４で示す
ように、ゲート部２部分をカッティングする。この切断
により、円形状の外周面を有し、その一部にゲート残り
部３が突出状態で形成されたレンズ１となる。Embodiment 1 FIGS. 1 to 5 show Embodiment 1 of the present invention. The lens in the present invention is made of injection-molded plastic or the like, and has a shape shown in FIG. 1 immediately after molding. In FIG. 1, reference numeral 1 is a lens made of plastic, which is formed into a circular shape. The lens 1 is integrally formed with the gate portion 2 at the time of molding, and the gate portion 2 is removed by cutting. In this cutting, the gate portion 2 is cut as shown by a cutting line 4 without cutting the lens 1. By this cutting, the lens 1 has a circular outer peripheral surface, and the remaining gate portion 3 is formed in a part of the outer peripheral surface in a protruding state.
【００１２】この場合、ゲート残り部３は図２および図
５に示すように、レンズ１の外周面における光軸方向の
一側１ａに形成されるものであり、光軸方向の他側１ｂ
は全周が円形状の外周面となっている。この外周面の他
側１ｂをレンズの径方向の位置決め面とするものであ
る。また、レンズ１は光学有効面の外側の外周部分にフ
ラット面１ｃが形成され、このフラット面１ｃがレンズ
１の光軸方向の位置決め面となる。In this case, the remaining gate portion 3 is formed on one side 1a in the optical axis direction on the outer peripheral surface of the lens 1 and on the other side 1b in the optical axis direction, as shown in FIGS.
Has a circular outer peripheral surface. The other side 1b of the outer peripheral surface is used as a radial positioning surface of the lens. A flat surface 1c is formed on the outer peripheral portion of the lens 1 outside the optically effective surface, and the flat surface 1c serves as a positioning surface of the lens 1 in the optical axis direction.
【００１３】かかる形状のレンズ１は図２の矢印で示す
ように、外周面の他側１ｂから鏡筒１０内に挿入され
る。鏡筒１０は図２および図３に示すように、レンズ１
の他側１ｂが挿入される筒部１１と、レンズの一側１ａ
が挿入される大径部１２とを備えている。筒部１１はレ
ンズ１が挿入された奥側に形成されており、この内周面
の３等分位置には突起部１３が形成されている。突起部
１３は図３の二点鎖線で示すように、その内接円１４に
接するように形成される。内接円１４はレンズ１の外径
と略同一径で、しかも、その中心１４ａがレンズの光軸
と一致するようになっている。かかる突起部１３は図４
に示すように、レンズ１の他側１ｂの外周面が嵌合する
ことにより、レンズ１の径方向の位置決めが行われ、こ
れによりレンズ１の光軸と鏡筒１０の軸心とが一致す
る。従って、レンズ１の他側１ｂの外周面を突起部１３
に嵌合させるだけで、レンズ１を高精度に位置決めする
ことができる。The lens 1 having such a shape is inserted into the lens barrel 10 from the other side 1b of the outer peripheral surface as shown by the arrow in FIG. As shown in FIGS. 2 and 3, the lens barrel 10 includes a lens 1
The cylindrical portion 11 into which the other side 1b is inserted, and the one side 1a of the lens
And a large diameter portion 12 into which is inserted. The cylindrical portion 11 is formed on the inner side where the lens 1 is inserted, and the protrusion portion 13 is formed at three equally divided positions on the inner peripheral surface. The protrusion 13 is formed so as to be in contact with the inscribed circle 14 thereof, as shown by the chain double-dashed line in FIG. The inscribed circle 14 has substantially the same diameter as the outer diameter of the lens 1, and the center 14a thereof coincides with the optical axis of the lens. The protrusion 13 is shown in FIG.
As shown in FIG. 3, the outer peripheral surface of the other side 1b of the lens 1 is fitted to position the lens 1 in the radial direction, whereby the optical axis of the lens 1 and the axial center of the lens barrel 10 coincide with each other. . Therefore, the outer peripheral surface of the other side 1b of the lens 1 is attached to the protrusion 13
The lens 1 can be positioned with high precision simply by fitting the lens 1 to.
【００１４】大径部１２はこの筒部１１よりも前側、す
なわちレンズ１の挿入側に連通状態で形成されている。
この大径部１２はレンズ１の一側１ａが挿入されるもの
であり、レンズ１の一側１ａに設けられているゲート残
り部３と干渉しない径寸法を有している。また、大径部
１２はその全域がレンズ１の一側１ａに対向している。
従って、レンズ１を鏡筒１０に挿入しても、ゲート残り
部３が大径部１２内に位置するため、鏡筒１０と干渉す
ることがなくなる。The large-diameter portion 12 is formed in front of the cylindrical portion 11, that is, on the insertion side of the lens 1 in a communicating state.
The large diameter portion 12 is one in which the one side 1a of the lens 1 is inserted, and has a diameter dimension that does not interfere with the remaining gate portion 3 provided on the one side 1a of the lens 1. The entire area of the large diameter portion 12 faces one side 1 a of the lens 1.
Therefore, even if the lens 1 is inserted into the lens barrel 10, the remaining gate portion 3 is located inside the large diameter portion 12, and therefore the lens 1 does not interfere with the lens barrel 10.
【００１５】図２において、１５は鏡筒１０における筒
部１１のさらに、奥側に形成された突当部である。この
突当部１５は図５に示すように、レンズ１の光学有効面
の外側に設けられたフラット面１ｃが当接し、これによ
りレンズ１の光軸方向の位置決めが行われる。１６は鏡
筒１０におけるレンズ１の挿入先端側に拡径状に形成さ
れた遮光部であり、内面に遮光線が施されることにより
不要な光束の入射を防止する。In FIG. 2, reference numeral 15 denotes an abutting portion formed on the inner side of the barrel portion 11 of the lens barrel 10. As shown in FIG. 5, the abutting portion 15 is in contact with a flat surface 1c provided outside the optically effective surface of the lens 1, whereby the lens 1 is positioned in the optical axis direction. Reference numeral 16 denotes a light-shielding portion formed in a diameter-expanded shape on the insertion tip side of the lens 1 in the lens barrel 10, and a light-shielding line is provided on the inner surface thereof to prevent unnecessary light flux from entering.
【００１６】以上のような鏡筒１０は全体がポリカーボ
ネートなどのプラスチックにより成形されるが、より好
ましくは、ガラス繊維、金属繊維などを混入したポリカ
ーボネート、その他の繊維強化プラスチックにより成形
される。これにより鏡筒１０の強度が増加するばかりで
なく、表面が粗面となるため、レンズ１を摩擦力により
良好に固定でき、しかも後述する接着剤の接着面積が大
きくなるため、接着強度も増大する。さらに、鏡筒１０
としてはカーボンを適量混合した黒色の繊維強化プラス
チックを用いることもでき、これにより、鏡筒１０内面
の反射を防止することができる。一方、レンズ１はアク
リル、ポリカーボネートあるいはポリオレフィンなどの
プラスチックが使用される。このように、レンズ１およ
び鏡筒１０の双方をプラスチックとした場合、突起部１
３とレンズ１の外周面との接触面が塑性変形あるいは弾
性変形するため、歪を発生させることがない状態でレン
ズ１を組み込むことができると共に、必要以上なクリア
ランスを両者の間に設ける必要がなく、取付け精度が向
上する。The lens barrel 10 as described above is wholly formed of plastic such as polycarbonate, but more preferably formed of polycarbonate mixed with glass fiber, metal fiber or the like, or other fiber reinforced plastic. As a result, not only the strength of the lens barrel 10 increases, but also the surface becomes rough, so that the lens 1 can be satisfactorily fixed by the frictional force, and the adhesion area of the adhesive described later increases, so the adhesion strength also increases. To do. Furthermore, the lens barrel 10
A black fiber-reinforced plastic in which an appropriate amount of carbon is mixed can also be used as this, and thus reflection on the inner surface of the lens barrel 10 can be prevented. On the other hand, the lens 1 is made of plastic such as acrylic, polycarbonate or polyolefin. Thus, when both the lens 1 and the lens barrel 10 are made of plastic, the protrusion 1
Since the contact surface between the lens 3 and the outer peripheral surface of the lens 1 is plastically or elastically deformed, the lens 1 can be incorporated in a state in which no strain is generated, and it is necessary to provide an unnecessary clearance between them. No, the mounting accuracy is improved.
【００１７】レンズ１および鏡筒１０の各部の寸法につ
いては、鏡筒１０の突起部１３の内接円１４がレンズ１
の外径よりも０．０１〜０．０２ｍｍ程度大きい径とす
ることが好ましい。この程度の寸法差を設けることによ
り、温度変化や吸湿による寸法変化に十分に対応できる
ため、レンズ１に歪が生じない。また、突起部１３以外
の筒部１１とレンズ１の外周面との間は０．０５〜０．
１ｍｍ程度の隙間を有するように、突起部１３の突出量
が設定される。一方、鏡筒１０の大径部１２の径はレン
ズ１の外径よりも１〜２ｍｍ程度大きく設定される。レ
ンズ１の径が例えば、１５ｍｍの場合、ゲート残り部３
の幅は２〜３ｍｍで、レンズ１の外周面から０．１〜
０．６ｍｍ程度突出しており、大径部１２を上述した寸
法とすることにより、ゲート残り部３が干渉することな
く、大径部１２内にセットすることができる。かかる大
径部１２は接着剤が供給されるものであり、接着剤の供
給量確保の観点から、大径部１２の長さ方向の幅を１．
２〜１．５ｍｍ程度とすることが好ましい。Regarding the size of each part of the lens 1 and the lens barrel 10, the inscribed circle 14 of the projection 13 of the lens barrel 10 is the lens 1
It is preferable that the diameter is about 0.01 to 0.02 mm larger than the outer diameter. By providing such a dimensional difference, it is possible to sufficiently cope with a dimensional change due to temperature change or moisture absorption, so that the lens 1 is not distorted. Further, the distance between the cylindrical portion 11 other than the protrusion 13 and the outer peripheral surface of the lens 1 is 0.05 to 0.
The amount of protrusion of the protrusion 13 is set so as to have a gap of about 1 mm. On the other hand, the diameter of the large diameter portion 12 of the lens barrel 10 is set to be larger than the outer diameter of the lens 1 by about 1 to 2 mm. If the diameter of the lens 1 is, for example, 15 mm, the remaining gate portion 3
Has a width of 2 to 3 mm and is 0.1 to 0.1 mm from the outer peripheral surface of the lens 1.
The protrusion is about 0.6 mm, and by setting the large diameter portion 12 to the above-described size, it can be set in the large diameter portion 12 without the remaining gate portion 3 interfering. The large-diameter portion 12 is supplied with an adhesive, and the width of the large-diameter portion 12 in the length direction is set to 1.
It is preferably about 2 to 1.5 mm.
【００１８】図４および図５はレンズ１の他側１ｂの外
周面を鏡筒１０の筒部１１の突起部１３に嵌め込んで位
置決めした後、接着剤２０を供給した状態を示す。接着
剤２０は鏡筒１０の大径部１２とレンズ１の一側１ａの
外周面との間に供給され、図示側においてはレンズ１の
全周にわたって供給されている。かかる接着剤２０の供
給部位にはゲート残り部３が位置しており、ゲート残り
部３の面積だけ接着面積が増大しているため、接着力が
強化されている。しかも鏡筒１０の大径部１２にはレン
ズ１のゲート残り部３が干渉しない大きな径となってお
り、接着剤層が厚くなっている。このため、接着剤層が
温度変化や吸湿に対して十分な緩衝力を有し、レンズ１
に歪が発生することがないと共に、衝撃などの外力が作
用してもレンズ１が外れることがなくなる。なお、図示
例では、レンズ１の外周面全体に接着剤が供給されてお
り、これにより防水機能も備えている。4 and 5 show a state in which the adhesive 20 is supplied after the outer peripheral surface of the other side 1b of the lens 1 is fitted into the projection 13 of the tube portion 11 of the lens barrel 10 to be positioned. The adhesive 20 is supplied between the large diameter portion 12 of the lens barrel 10 and the outer peripheral surface of the one side 1a of the lens 1, and is supplied over the entire circumference of the lens 1 on the illustrated side. Since the remaining gate portion 3 is located at the supply site of the adhesive 20, and the adhesion area is increased by the area of the remaining gate portion 3, the adhesive force is strengthened. Moreover, the large diameter portion 12 of the lens barrel 10 has a large diameter so that the remaining gate portion 3 of the lens 1 does not interfere, and the adhesive layer is thick. Therefore, the adhesive layer has a sufficient buffering force against temperature change and moisture absorption, and the lens 1
The lens 1 is prevented from being disengaged even when an external force such as an impact is applied. In the illustrated example, the adhesive is supplied to the entire outer peripheral surface of the lens 1, which also has a waterproof function.
【００１９】かかる接着剤としては、弾性を有したもの
が良好であり、シリコン系やウレタン系を選択すること
ができる。また、この接着剤は大径部１２から筒部１１
へ流入することのない粘度を有していることが良好であ
り、８００〜１２００ポアズ、より好ましくは１０００
ポアズ前後の粘度の接着剤が選択される。特に接着剤と
してシリコン系接着剤を使用した場合、この接着剤が温
度による硬度変化や弾性変化がないため、レンズ１に歪
が生じにくいと共に、耐薬品性を有するため、レンズ１
を拭く際の洗浄剤が接触しても劣化することがないメリ
ットがある。さらに、カーボン等の黒色着色材料を接着
剤に１重量％程度、混合しても良い。これによりゲート
残り部３を隠蔽できると共に鏡筒１０との色統一がなさ
れて外観が向上する。しかも、黒色のため、鏡筒内面で
の反射もなく、カメラの鏡筒に好適に適用することがで
きる。As such an adhesive, one having elasticity is preferable, and a silicone type or a urethane type can be selected. In addition, this adhesive is used from the large diameter portion 12 to the tubular portion 11
It is good to have a viscosity so that it does not flow into the 800 to 1200 poise, more preferably 1000
An adhesive with a viscosity around the poise is selected. In particular, when a silicone-based adhesive is used as the adhesive, since the adhesive does not change in hardness or elasticity due to temperature, the lens 1 is less likely to be distorted and has a chemical resistance.
There is a merit that the cleaning agent does not deteriorate even if it comes into contact with the cleaning agent. Further, a black coloring material such as carbon may be mixed with the adhesive in an amount of about 1% by weight. As a result, the remaining gate portion 3 can be hidden, and the color of the lens barrel 10 is unified to improve the appearance. Moreover, since it is black, there is no reflection on the inner surface of the lens barrel, and it can be suitably applied to the lens barrel of a camera.
【００２０】図６は本実施例の変形例を示し、接着剤２
０がスポット的（図示例では３箇所）に供給されてい
る。この接着剤２０もレンズ１の一側１ａの外周面と鏡
筒１０１の大径部１２との間に供給されるが、ゲート残
り部３を必ず含むように供給される。かかるスポット的
な接着剤２０の場合には、レンズ１への応力が減じるた
め、レンズ１がさらに歪を生じにくいメリットがある。FIG. 6 shows a modified example of this embodiment, in which the adhesive 2
0 is supplied spotwise (three places in the illustrated example). The adhesive 20 is also supplied between the outer peripheral surface of the one side 1a of the lens 1 and the large-diameter portion 12 of the lens barrel 101, but is supplied so as to include the remaining gate portion 3. In the case of such a spot-like adhesive 20, the stress on the lens 1 is reduced, so that there is an advantage that the lens 1 is less likely to be distorted.
【００２１】図７および図８はレンズ１の変形例を示
す。図７はレンズ１を多点ピンゲートにより成形するこ
とにより、複数のゲート部２が一体的に形成されるもの
であり、レンズ１からゲート残り部３が突出するように
各ゲート部２を切断する。図８は円形状のフィルムゲー
トによりレンズ１を成形したものであり、ゲート残り部
３がレンズ１の外周全体に形成されている。これらの成
形はレンズ１の真円度の確保、成形時の内部応力の減少
あるいはレンズの面精度の確保から適宜、選択されるも
のであり、いずれも上述した実施例に使用することがで
きる。7 and 8 show modifications of the lens 1. In FIG. 7, a plurality of gate portions 2 are integrally formed by molding the lens 1 with a multi-point pin gate, and each gate portion 2 is cut so that the remaining gate portion 3 projects from the lens 1. . In FIG. 8, the lens 1 is formed by a circular film gate, and the remaining gate portion 3 is formed on the entire outer periphery of the lens 1. These moldings are appropriately selected from the viewpoints of ensuring the roundness of the lens 1, reducing the internal stress at the time of molding, or ensuring the surface accuracy of the lens, and any of them can be used in the above-mentioned embodiments.
【００２２】[0022]
【実施例２】図９および図１０は本発明の実施例２を示
す。図９はレンズ１挿入前の鏡筒１０を示し、レンズ１
の他側１ｂが挿入される筒部１１には、３等分位置に突
起部１３が形成されている。また、この突起部１３以外
の略３等分位置には受座１７が形成されている。受座１
７は図１０に示すように、突当部１５におけるレンズ挿
入側の面にレンズ１方向へ突出するように形成されてい
る。この受座１７はその包絡線がレンズ１の光軸と直交
するように形成され、レンズ１の光学有効面の外側のフ
ラット面１ｃが当接する。これによりレンズ１の鏡筒内
での傾きを防止することができるため、光軸方向の位置
決めを正確に行うことができるメリットがある。なお、
レンズ１の径方向の位置決めは、前記実施例と同様に突
起部１３がレンズ１の他側１ｂの外周面に嵌合すること
により行われる。Second Embodiment FIGS. 9 and 10 show a second embodiment of the present invention. FIG. 9 shows the lens barrel 10 before the lens 1 is inserted.
The cylindrical portion 11 into which the other side 1b is inserted is formed with protrusions 13 at three equal positions. Further, a receiving seat 17 is formed at a substantially trisection position other than the protruding portion 13. Seat 1
As shown in FIG. 10, 7 is formed on the surface of the abutting portion 15 on the lens insertion side so as to project in the direction of the lens 1. The seat 17 is formed so that its envelope is orthogonal to the optical axis of the lens 1, and the flat surface 1c outside the optically effective surface of the lens 1 contacts. As a result, it is possible to prevent the lens 1 from tilting in the lens barrel, and there is an advantage that positioning in the optical axis direction can be performed accurately. In addition,
The positioning of the lens 1 in the radial direction is performed by fitting the protrusion 13 to the outer peripheral surface of the other side 1b of the lens 1 as in the above-described embodiment.
【００２３】[0023]
【発明の効果】以上のとおり本発明は、レンズを高精度
に位置決めできると共に、レンズにゲート残り部を形成
して接着剤との接着面積を増大させるため、レンズを強
固に固定することができ、しかも鏡筒に大径部を形成し
て接着剤を厚くするため、レンズに歪を生じることがな
くなる。As described above, according to the present invention, the lens can be positioned with high accuracy, and the remaining portion of the gate is formed on the lens to increase the adhesive area with the adhesive, so that the lens can be firmly fixed. Moreover, since the large diameter portion is formed in the lens barrel to thicken the adhesive, the lens is not distorted.
【図１】本発明の実施例１のレンズの正面図。FIG. 1 is a front view of a lens according to a first embodiment of the present invention.
【図２】レンズを挿入する以前の断面図。FIG. 2 is a cross-sectional view before inserting a lens.
【図３】レンズを挿入する以前の鏡筒の正面図。FIG. 3 is a front view of the lens barrel before the lens is inserted.
【図４】レンズ装着状態の正面図。FIG. 4 is a front view of a lens mounted state.
【図５】レンズ装着状態の断面図。FIG. 5 is a sectional view of a lens mounted state.
【図６】実施例１の変形例の正面図。FIG. 6 is a front view of a modified example of the first embodiment.
【図７】レンズの変形例の正面図。FIG. 7 is a front view of a modified example of the lens.
【図８】レンズの別の変形例の正面図。FIG. 8 is a front view of another modification of the lens.
【図９】実施例２のレンズ挿入前の鏡筒の正面図。FIG. 9 is a front view of the lens barrel of Example 2 before the lens is inserted.
【図１０】実施例２の断面図。FIG. 10 is a sectional view of the second embodiment.
【図１１】従来のレンズの正面図。FIG. 11 is a front view of a conventional lens.
１ レンズ １ａ レンズの一側 １ｂ レンズの他側 ３ ゲート残り部 １０ 鏡筒 １１ 筒部 １２ 大径部 ２０ 接着剤 1 Lens 1a One Side of Lens 1b Other Side of Lens 3 Gate Remaining Part 10 Lens Barrel 11 Tube Part 12 Large Diameter Part 20 Adhesive
Claims (4)
残り部を突出状態で有し、他側が径方向の位置決め面と
なるプラスチックで成形されたレンズと、 その内接円がレンズの外径と略同一径でしかも内接円の
中心がレンズの光軸と一致してレンズの他側の外周面が
嵌合する突出部が円周面の少なくとも３等分位置に形成
された筒部と、前記ゲート残り部と干渉しない径寸法を
有しレンズの一側に対向する内周面の全域に形成された
大径部とを有する鏡筒と、 この鏡筒の大径部とレンズの一側の外周面との間に供給
された接着剤とを備えていることを特徴とするレンズ保
持装置。1. A lens made of plastic having a gate remaining portion in a protruding state on one side in the optical axis direction on the outer peripheral surface and a radial positioning surface on the other side, and an inscribed circle of which is the outside of the lens. A cylindrical portion having a diameter substantially equal to that of the diameter of the inscribed circle, and a projection to which the center of the inscribed circle coincides with the optical axis of the lens and the outer peripheral surface of the other side of the lens fits is formed in at least three equal parts of the peripheral surface. And a lens barrel having a diameter dimension that does not interfere with the remaining gate portion and a large diameter portion formed over the entire inner peripheral surface facing one side of the lens, and a large diameter portion of the lens barrel and the lens. A lens holding device comprising: an adhesive supplied between the outer peripheral surface on one side;
ゲート残り部を含む外周面部分と鏡筒の大径部との間に
供給されることを特徴とする請求項１記載のレンズ保持
装置。2. The lens holding device according to claim 1, wherein the adhesive is supplied between an outer peripheral surface portion including at least a gate remaining portion of the lens and a large diameter portion of the lens barrel.
いることを特徴とする請求項１または２に記載のレンズ
保持装置。3. The lens holding device according to claim 1, wherein a black coloring material is added to the adhesive.
光軸と直交してレンズの挿入側の面と当接する受座を内
周面の少なくとも３箇所に有していることを特徴とする
請求項１記載のレンズ保持装置。4. The cylindrical portion of the lens barrel has at least three seats on the inner peripheral surface whose envelope is orthogonal to the optical axis of the lens and comes into contact with the surface on the lens insertion side. The lens holding device according to claim 1, which is characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34060793A JP3365843B2 (en) | 1993-12-08 | 1993-12-08 | Lens holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34060793A JP3365843B2 (en) | 1993-12-08 | 1993-12-08 | Lens holding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07159663A true JPH07159663A (en) | 1995-06-23 |
| JP3365843B2 JP3365843B2 (en) | 2003-01-14 |
Family
ID=18338604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34060793A Expired - Fee Related JP3365843B2 (en) | 1993-12-08 | 1993-12-08 | Lens holding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3365843B2 (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1082934A (en) * | 1996-09-06 | 1998-03-31 | Omron Corp | Optical module and its manufacture, laser radar device, vehicle, photoelectric sensor, optical sensor device and code information processor using the optical module |
| JP2000002623A (en) * | 1998-06-17 | 2000-01-07 | Asahi Optical Co Ltd | Optical member inspecting device and holder therefor |
| JP2005300690A (en) * | 2004-04-07 | 2005-10-27 | Seiko Precision Inc | Lens unit |
| JP2006064929A (en) * | 2004-08-26 | 2006-03-09 | Sony Corp | Lens barrel and imaging apparatus |
| JP2006201378A (en) * | 2005-01-19 | 2006-08-03 | Hitachi Maxell Ltd | Lens system |
| JP2006259561A (en) * | 2005-03-18 | 2006-09-28 | Fujinon Corp | Plastic lens, its manufacturing method, and its manufacturing apparatus |
| WO2009110257A1 (en) * | 2008-03-05 | 2009-09-11 | ソニー株式会社 | Camera module |
| JP2011018081A (en) * | 2010-10-25 | 2011-01-27 | Hitachi Maxell Ltd | Lens system |
| JP2012142896A (en) * | 2011-01-06 | 2012-07-26 | Nikon Corp | Electronic display apparatus and imaging apparatus |
| US8355216B2 (en) | 2006-11-17 | 2013-01-15 | Olympus Medical Systems Corp. | Image pickup module and image forming lens for the same |
| CN102981238A (en) * | 2011-09-07 | 2013-03-20 | 奥林巴斯映像株式会社 | Maintaining frame, optical element maintaining unit, lens and lens cone unit and photographic device |
| JP2013142808A (en) * | 2012-01-11 | 2013-07-22 | Hoya Corp | Lens holding frame, lens adhesion method and lens adhesion structure |
| JP2015051567A (en) * | 2013-09-06 | 2015-03-19 | キヤノン株式会社 | Optical scanner and image forming apparatus |
| JP2015148829A (en) * | 2011-08-25 | 2015-08-20 | パナソニックＩｐマネジメント株式会社 | plastic lens |
| US9857722B2 (en) | 2015-09-24 | 2018-01-02 | Canon Kabushiki Kaisha | Light source device, optical scanning apparatus, and image forming apparatus |
| US9857721B2 (en) | 2015-09-15 | 2018-01-02 | Canon Kabushiki Kaisha | Light source device, optical scanning apparatus and image forming apparatus |
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| JPS63287808A (en) * | 1987-05-20 | 1988-11-24 | Matsushita Electric Ind Co Ltd | Lens assembly |
| JPS6443313U (en) * | 1987-09-11 | 1989-03-15 | ||
| JPH0413909U (en) * | 1990-05-23 | 1992-02-04 | ||
| JPH04166904A (en) * | 1990-10-31 | 1992-06-12 | Olympus Optical Co Ltd | Lens holding barrel |
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1993
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| JPS61129616A (en) * | 1984-11-28 | 1986-06-17 | Olympus Optical Co Ltd | Endoscope |
| JPS63287808A (en) * | 1987-05-20 | 1988-11-24 | Matsushita Electric Ind Co Ltd | Lens assembly |
| JPS6443313U (en) * | 1987-09-11 | 1989-03-15 | ||
| JPH0413909U (en) * | 1990-05-23 | 1992-02-04 | ||
| JPH04166904A (en) * | 1990-10-31 | 1992-06-12 | Olympus Optical Co Ltd | Lens holding barrel |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1082934A (en) * | 1996-09-06 | 1998-03-31 | Omron Corp | Optical module and its manufacture, laser radar device, vehicle, photoelectric sensor, optical sensor device and code information processor using the optical module |
| JP2000002623A (en) * | 1998-06-17 | 2000-01-07 | Asahi Optical Co Ltd | Optical member inspecting device and holder therefor |
| JP2005300690A (en) * | 2004-04-07 | 2005-10-27 | Seiko Precision Inc | Lens unit |
| JP2006064929A (en) * | 2004-08-26 | 2006-03-09 | Sony Corp | Lens barrel and imaging apparatus |
| JP2006201378A (en) * | 2005-01-19 | 2006-08-03 | Hitachi Maxell Ltd | Lens system |
| JP4672407B2 (en) * | 2005-03-18 | 2011-04-20 | 富士フイルム株式会社 | Plastic lens and method and apparatus for manufacturing the same |
| JP2006259561A (en) * | 2005-03-18 | 2006-09-28 | Fujinon Corp | Plastic lens, its manufacturing method, and its manufacturing apparatus |
| US8355216B2 (en) | 2006-11-17 | 2013-01-15 | Olympus Medical Systems Corp. | Image pickup module and image forming lens for the same |
| US7990635B2 (en) | 2008-03-05 | 2011-08-02 | Sony Corporation | Camera module |
| WO2009110257A1 (en) * | 2008-03-05 | 2009-09-11 | ソニー株式会社 | Camera module |
| JP2011018081A (en) * | 2010-10-25 | 2011-01-27 | Hitachi Maxell Ltd | Lens system |
| JP2012142896A (en) * | 2011-01-06 | 2012-07-26 | Nikon Corp | Electronic display apparatus and imaging apparatus |
| JP2015148829A (en) * | 2011-08-25 | 2015-08-20 | パナソニックＩｐマネジメント株式会社 | plastic lens |
| CN102981238A (en) * | 2011-09-07 | 2013-03-20 | 奥林巴斯映像株式会社 | Maintaining frame, optical element maintaining unit, lens and lens cone unit and photographic device |
| JP2013057764A (en) * | 2011-09-07 | 2013-03-28 | Olympus Imaging Corp | Holding frame, optical element holding unit, lens barrel unit and imaging apparatus |
| JP2013142808A (en) * | 2012-01-11 | 2013-07-22 | Hoya Corp | Lens holding frame, lens adhesion method and lens adhesion structure |
| JP2015051567A (en) * | 2013-09-06 | 2015-03-19 | キヤノン株式会社 | Optical scanner and image forming apparatus |
| US9857721B2 (en) | 2015-09-15 | 2018-01-02 | Canon Kabushiki Kaisha | Light source device, optical scanning apparatus and image forming apparatus |
| US9857722B2 (en) | 2015-09-24 | 2018-01-02 | Canon Kabushiki Kaisha | Light source device, optical scanning apparatus, and image forming apparatus |
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