JP2805707B2 - Lens holding device - Google Patents
Lens holding deviceInfo
- Publication number
- JP2805707B2 JP2805707B2 JP63219093A JP21909388A JP2805707B2 JP 2805707 B2 JP2805707 B2 JP 2805707B2 JP 63219093 A JP63219093 A JP 63219093A JP 21909388 A JP21909388 A JP 21909388A JP 2805707 B2 JP2805707 B2 JP 2805707B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- frame
- peripheral surface
- adhesive
- holding device
- 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 - Lifetime
Links
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、レンズ保持装置に係り、特に、接着剤を介
してレンズを鏡枠内に歪みがなく、かつ確実に固定保持
するレンズ保持装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens holding device, and more particularly, to a lens holding device for securely fixing and holding a lens in a lens frame via an adhesive without distortion. About.
〔従来の技術〕 従来、接着剤を介してレンズ鏡枠内に固定するレンズ
保持装置としては、第７図、実開昭58−168702号公報及
び実開昭61−49319号公報に示されるものが知られてい
る。[Prior Art] Conventionally, as a lens holding device fixed in a lens barrel via an adhesive, those shown in FIG. 7, Japanese Utility Model Application Laid-Open No. 58-168702 and Japanese Utility Model Application Laid-Open No. 61-49319 are disclosed. It has been known.
第７図にて示すレンズ保持装置は、レンズ１を鏡枠２
内にレンズ胴付部３と鏡枠胴付部４とを当接させてスラ
スト方向（光軸方向）に位置決めしつつ支持するととも
に、レンズ１の外周面と鏡枠２の内周面との間に接着剤
５を充填してレンズ１を鏡枠２内に固定保持するもので
ある。The lens holding device shown in FIG.
The lens barrel attachment 3 and the lens barrel attachment 4 are brought into contact with each other and positioned and supported in the thrust direction (optical axis direction), and the outer peripheral surface of the lens 1 and the inner peripheral surface of the lens frame 2 are supported. The lens 1 is fixedly held in the lens frame 2 by filling an adhesive 5 therebetween.
実開昭58−168702号公報に開示された技術は、レンズ
枠内壁に大径部と小径部とを設け、レンズを小径部にて
支持するとともに、レンズ外周面と大径部との間に接着
剤を充填してレンズをレンズ枠内に固定するものであ
る。The technique disclosed in Japanese Utility Model Laid-Open No. 58-168702 discloses a large diameter portion and a small diameter portion provided on the inner wall of a lens frame, and the lens is supported by the small diameter portion, and between the lens outer peripheral surface and the large diameter portion. The adhesive is filled to fix the lens in the lens frame.
実開昭61−49319号公報に開示された技術は、レンズ
外周に設けたテーパー部と枠内周に設けた溝部を利用
し、レンズ又は枠に合成樹脂製の押え部材を押しつけて
超音波により押え部材を溶融させ、レンズを枠内に固定
保持するものである。The technique disclosed in Japanese Utility Model Laid-Open Publication No. 61-49319 uses a taper portion provided on the outer periphery of the lens and a groove provided on the inner periphery of the frame, and a pressing member made of a synthetic resin is pressed against the lens or the frame to generate ultrasonic waves. The pressing member is melted to fix and hold the lens in the frame.
第７図に示した従来技術にあっては、レンズ１を鏡枠
２内に固定するための接着剤５が、レンズ１のスラスト
方向の位置決めをするレンズ胴付部３と鏡枠胴付部４か
ら離れているため、接着剤５が硬化しレンズ１を鏡枠２
内に固定する過程にあって、接着剤５の硬化収縮により
レンズ１がスラスト方向に浮き上がってスラスト方向の
位置ズレを生じさせるという問題点があった。In the prior art shown in FIG. 7, an adhesive 5 for fixing the lens 1 in the lens frame 2 includes a lens barrel 3 and a lens barrel body for positioning the lens 1 in the thrust direction. 4, the adhesive 5 is cured and the lens 1 is moved to the lens frame 2
In the process of fixing the lens 1 inside, there is a problem that the lens 1 floats in the thrust direction due to the curing shrinkage of the adhesive 5, causing a positional shift in the thrust direction.
実開昭58−168702号公報の技術にあっては、スラスト
方向の位置決め用の胴付部と大径部間にレンズが保持さ
れるので、大径部に充填された接着剤を介してレンズを
保持する際、接着剤の硬化収縮によって接着剤方向にレ
ンズが引張られて胴付部から浮き上がりスラスト方向の
位置の確保に不具合が生じていた。かかる不具合のため
大径部側に押え環を用いることが考えられるが、レンズ
保持の部品点数を増加させるものである。In the technique disclosed in Japanese Utility Model Application Laid-Open No. 58-168702, the lens is held between the barrel portion for positioning in the thrust direction and the large-diameter portion. When holding the lens, the lens is pulled in the direction of the adhesive due to the curing shrinkage of the adhesive, so that the lens is lifted up from the body and has a problem in securing a position in the thrust direction. It is conceivable to use a press ring on the large-diameter portion side due to such a problem, but this increases the number of components for holding the lens.
さらに、実開昭61−49319号公報の技術にあっては、
合成樹脂製の押え環を超音波溶着してレンズを固定して
いるので、レンズに強い振動が伝わり、枠胴付部がつぶ
れたり、レンズ本体のスラスト方向の位置の確保ができ
なくなるという問題点があった。Furthermore, in the technology of Japanese Utility Model Laid-Open No. 61-49319,
Since the synthetic resin press ring is ultrasonically welded to the lens to fix the lens, strong vibrations are transmitted to the lens, causing the frame body to collapse and the lens body to be unable to secure its position in the thrust direction. was there.
上記目的を達成するために、本発明のレンズ保持装置
は、第１図の概念図に示すように、レンズ10を鏡枠11内
でスラスト方向（光軸方向）に位置決めする枠胴付部12
に近づくにしたがって、レンズ10の外周面と鏡枠11の内
周面との間隙13が広くなるようにレンズ10の外周面（ま
たは／および鏡枠11の内周面の）スラスト方向にテーパ
ー部14を設け、上記間隙13に充填した接着剤15を介して
レンズ10を鏡枠11内の所定位置に固定し得るように構成
されている。In order to achieve the above object, as shown in the conceptual view of FIG. 1, the lens holding device of the present invention comprises a frame body attaching portion 12 for positioning a lens 10 in a lens barrel 11 in a thrust direction (optical axis direction).
The taper portion in the thrust direction of the outer peripheral surface of the lens 10 (or / and the inner peripheral surface of the lens frame 11) such that the gap 13 between the outer peripheral surface of the lens 10 and the inner peripheral surface of the lens frame 11 increases as the distance approaches A lens 14 is provided so that the lens 10 can be fixed at a predetermined position in the lens frame 11 via an adhesive 15 filled in the gap 13.
上記のように構成されたレンズ保持装置によれば、間
隙13に充填された接着剤15は、硬化に際しラジアル方向
（径方向）の厚みが薄い部分、即ち、第１図におけるテ
ーパー部14の上方から硬化し始め、次第に厚みが大きい
部分、即ち、枠胴付部12方向に硬化が進んでレンズ10を
鏡枠11内に固定する。よって、接着剤15の硬化収縮は、
テーパー部14の上部から下部（胴付部方向）に向かって
生じ、レンズ10には接着剤15の収縮力によって枠胴付部
12方向に引張力が作用する。According to the lens holding device configured as described above, the adhesive 15 filled in the gap 13 has a small thickness in the radial direction (radial direction) upon curing, that is, the portion above the tapered portion 14 in FIG. Then, the curing proceeds in the direction of the thicker portion, that is, the direction of the frame body attaching portion 12, and the lens 10 is fixed in the lens frame 11. Therefore, the curing shrinkage of the adhesive 15 is
Generated from the upper part of the taper part 14 to the lower part (in the direction of the body part), the lens 10 is attached to the frame 10 by the contraction force of the adhesive 15
Tensile force acts in 12 directions.
以下、図面を用いて、本発明の実施例を詳細に説明す
る。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
（第１実施例） 第２図及び第３図は、本発明の第１実施例を示すもの
である。(First Embodiment) FIGS. 2 and 3 show a first embodiment of the present invention.
図において20で示すのはレンズ21を収納保持する鏡枠
で、鏡枠20の内周面20aには、レンズ21をスラスト方向
（光軸方向）において位置決めしつつ保持する枠胴付部
22がラジアル方向（半径方向）に突設かつスラスト方向
に立設されている。In the figure, reference numeral 20 denotes a lens frame for housing and holding the lens 21. On the inner peripheral surface 20a of the lens frame 20, a frame body portion for positioning and holding the lens 21 in the thrust direction (optical axis direction).
Reference numeral 22 protrudes in the radial direction (radial direction) and stands upright in the thrust direction.
レンズ21は、その外周面に鏡枠20の内周面20aと嵌合
するレンズ嵌合部23が内周面20aと平行に形成されると
ともに、このレンズ嵌合部23と枠胴付部22に当接してレ
ンズ21のスラスト方向の位置を確保するレンズ胴付部24
間にレンズテーパー部25が設けられ、枠胴付部22近傍で
内周面20aとレンズ外周面（レンズテーパー部25）との
間隙26が枠胴付部22に近づくにしたがって広くなるよう
に形成されている。さらに、レンズテーパー部25には、
レンズ嵌合部23と同一面に形成したレンズ嵌合補助部27
がレンズ外周に複数個等間隔に設けられ、レンズ21と鏡
枠20の内周面20aとの嵌合面積を増大してレンズ21の鏡
枠20内における安定性を確保し得るように構成されてい
る。The lens 21 has a lens fitting portion 23 formed on the outer peripheral surface thereof for fitting with the inner peripheral surface 20a of the lens frame 20 in parallel with the inner peripheral surface 20a, and the lens fitting portion 23 and the frame body attaching portion 22 are formed. Lens body 24 that abuts the lens to secure the position of the lens 21 in the thrust direction.
A lens taper portion 25 is provided therebetween, and a gap 26 between the inner peripheral surface 20a and the lens outer peripheral surface (lens taper portion 25) near the frame body attaching portion 22 is formed so as to become wider as approaching the frame body attaching portion 22. Have been. Furthermore, the lens taper portion 25 includes
Lens fitting auxiliary part 27 formed on the same surface as lens fitting part 23
Are provided at equal intervals on the outer periphery of the lens, and are configured so that the fitting area between the lens 21 and the inner peripheral surface 20a of the lens frame 20 can be increased to ensure the stability of the lens 21 in the lens frame 20. ing.
そして、レンズ21を鏡枠20内に保持させる場合、枠胴
付部22とレンズ胴付部24とを当接してスラスト方向の位
置決めをするとともに間隙26に接着剤28を充填してレン
ズ21を鏡枠20内に固定するものである。なお、図中29で
示すのは接着剤28が枠胴付部22,レンズ胴付部24間への
はみ出しを防止するための接着剤溜まり部である。When the lens 21 is held in the lens frame 20, the frame body attachment portion 22 and the lens body attachment portion 24 are brought into contact with each other to position the lens 21 in the thrust direction, and the gap 21 is filled with an adhesive 28, and the lens 21 is attached. It is fixed inside the mirror frame 20. Reference numeral 29 in the drawing denotes an adhesive pool for preventing the adhesive 28 from protruding between the frame body 22 and the lens body 24.
本実施例によれば、間隙26に充填された接着剤28は、
硬化に際しラジアル方向（径方向）の厚みが薄い部分、
即ち、第２図におけるテーパー部25の上方から硬化し始
め、次第に厚みが大きい部分、即ち、枠胴付部22方向に
硬化が進むので、接着剤28の硬化収縮によってレンズ21
に引張力が枠胴付部22方向に作用し、レンズ21は枠胴付
部22に向かって力を受けることになる。よって、上記力
によりレンズ21が枠胴付部22から浮き上がることなくレ
ンズ21を鏡枠20内にスラスト方向の位置を確保しつつ固
着保持することができる。According to the present embodiment, the adhesive 28 filled in the gap 26 is
When the thickness in the radial direction (radial direction) is small during curing,
That is, the curing starts from above the tapered portion 25 in FIG. 2, and the curing progresses gradually toward the thicker portion, that is, the direction toward the frame body attaching portion 22, so that the curing of the adhesive 28 causes the lens 21 to cure.
Then, a tensile force acts in the direction of the frame body attaching portion 22, and the lens 21 receives a force toward the frame body attaching portion 22. Therefore, the lens 21 can be fixedly held in the lens barrel 20 while maintaining a position in the thrust direction without being lifted from the frame body attaching portion 22 by the above-mentioned force.
（第２実施例） 第４図は、本発明の第２実施例を示すものである。(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.
本実施例のレンズ保持装置は、外周面30aを鏡枠31の
内周面31aと平行に形成したレンズ30を保持するもの
で、鏡枠31の内周面31aに枠胴付部32がラジアル方向に
突設されるとともに、枠胴付部32に近づくにしたがって
レンズ30の外周面30aとの間隔が広くなるように鏡枠31
に枠テーパー部33が形成されている。The lens holding device of the present embodiment holds the lens 30 having the outer peripheral surface 30a formed in parallel with the inner peripheral surface 31a of the lens frame 31, and the frame body attaching portion 32 is radially attached to the inner peripheral surface 31a of the lens frame 31. Lens frame 31 so that the distance from the outer peripheral surface 30a of the lens 30 becomes wider as it approaches the frame body attaching portion 32.
Is formed with a frame taper portion 33.
本実施例によれば、レンズ30の外周面30aと枠テーパ
ー部33とにより形成される間隙26に接着剤28を充填して
レンズ30と鏡枠31とを固着することにより、上記第１実
施例と同様の作用，効果を得ることができる。According to the present embodiment, the gap 30 formed by the outer peripheral surface 30a of the lens 30 and the frame taper portion 33 is filled with the adhesive 28 and the lens 30 and the lens frame 31 are fixed to each other, whereby the first embodiment is performed. The same operation and effect as the example can be obtained.
（第３実施例） 第５図は、本発明の第３実施例を示すものである。(Third Embodiment) FIG. 5 shows a third embodiment of the present invention.
本実施例のレンズ保持装置は、鏡枠35の内周面35aに
枠胴付部36がラジアル方向に突設されるとともに、レン
ズ37にはレンズ有効径外にレンズ縁部38が形設され、枠
胴付部36とレンズ縁部38とによりレンズ37が鏡枠35内に
保持されるようになっている。さらに、レンズ縁部38の
外周面には上記第１実施例のレンズ21と同様にレンズ嵌
合部38a,レンズテーパー部38b及びレンズ嵌合補助部38c
が設けられ、鏡枠内周面35aとレンズテーパー部38bに間
隙26が形成されるように構成されている。In the lens holding device of the present embodiment, a frame body attached portion 36 is provided in the radial direction on the inner peripheral surface 35a of the lens frame 35, and a lens edge portion 38 is formed on the lens 37 outside the lens effective diameter. The lens 37 is held in the lens frame 35 by the frame body attaching portion 36 and the lens edge portion 38. Further, the lens fitting portion 38a, the lens taper portion 38b, and the lens fitting auxiliary portion 38c are provided on the outer peripheral surface of the lens edge portion 38 in the same manner as the lens 21 of the first embodiment.
Is provided, and the gap 26 is formed between the inner peripheral surface 35a of the lens barrel and the lens taper portion 38b.
本実施例によれば、レンズテーパー部38bと鏡枠内周
面31aとにより形成される間隙26に接着剤28を充填して
レンズ37と鏡枠35とを固着することにより、上記第１実
施例と同様の作用，効果を得ることができる。さらに、
レンズの有効径を害することなくレンズを鏡枠内に固定
保持することができる。According to the present embodiment, the gap between the lens taper portion 38b and the inner peripheral surface 31a of the lens frame is filled with the adhesive 28 to fix the lens 37 and the lens frame 35 to the first embodiment. The same operation and effect as the example can be obtained. further,
The lens can be fixedly held in the lens frame without impairing the effective diameter of the lens.
（第４実施例） 第６図は、本発明の第４実施例を示すものである。(Fourth Embodiment) FIG. 6 shows a fourth embodiment of the present invention.
本実施例のレンズ保持装置は、鏡枠40を上記第２実施
例と同様に枠胴付部32と枠テーパー部33が設けられて形
成するとともに、レンズ41は、その外周面に鏡枠40の内
周面40aと嵌合するレンズ嵌合部43が内周面40aと平行に
形成されるとともに、このレンズ嵌合部43と枠胴付部32
に当接してレンズ41のスラスト方向の位置を確保するレ
ンズ胴付部44間にレンズテーパー部45が設けられ、枠胴
付部32近傍で内周面40aとレンズ外周面（レンズテーパ
ー部45）との間隙26が枠胴付部32に近づくにしたがって
広くなるように形成されている。In the lens holding device of this embodiment, the lens frame 40 is formed by providing the frame body attaching portion 32 and the frame taper portion 33 similarly to the second embodiment, and the lens 41 has the lens frame 40 on the outer peripheral surface thereof. A lens fitting portion 43 that fits with the inner peripheral surface 40a is formed parallel to the inner peripheral surface 40a, and the lens fitting portion 43 and the frame body attaching portion 32
A lens taper portion 45 is provided between a lens body attached portion 44 for contacting the lens 41 and securing a position in the thrust direction of the lens 41, and an inner peripheral surface 40a and a lens outer peripheral surface (lens tapered portion 45) near the frame body attached portion 32. Is formed so as to increase as the gap 26 approaches the frame body attaching portion 32.
本実施例によれば、レンズ41のレンズテーパー面45と
鏡枠40の枠テーパー部33とにより形成される間隙26に接
着剤28を充填してレンズ41と鏡枠40とを固着することに
より、上記各実施例に比べてレンズ外周面と鏡枠内周面
との間隙の変化量を大きくして接着剤の硬化収縮による
引張力を増大させることができる。According to the present embodiment, the gap 28 formed by the lens taper surface 45 of the lens 41 and the frame taper portion 33 of the lens frame 40 is filled with the adhesive 28 to fix the lens 41 and the lens frame 40 together. As compared with the above embodiments, the amount of change in the gap between the outer peripheral surface of the lens and the inner peripheral surface of the lens frame can be increased to increase the tensile force due to the curing shrinkage of the adhesive.
以上のように、本発明によれば、レンズ外周面と鏡枠
内周面の一方又は双方に設けたテーパー部により形成さ
れる間隙に充填される接着剤のラジアル方向の厚みに変
化を持たすことができ、接着剤の硬化過程にあって、接
着剤のスラスト方向における硬化収縮にタイムラグを生
じさせることができるため、レンズには接着剤の収縮力
によって、枠胴付部方向に引張力を作用させることがで
き、レンズを鏡枠内にレンズスラスト位置出し面（枠胴
付部）から浮き上がることなく確実に接着固定すること
ができ、所望のレンズ系を得ることができる。As described above, according to the present invention, the thickness in the radial direction of the adhesive filled in the gap formed by the taper portion provided on one or both of the outer peripheral surface of the lens and the inner peripheral surface of the lens frame is varied. In the curing process of the adhesive, a time lag can be caused in the curing shrinkage of the adhesive in the thrust direction, so that a tensile force acts on the lens in the direction of the frame body by the contraction force of the adhesive. The lens can be securely bonded and fixed to the lens frame without being lifted from the lens thrust positioning surface (frame body attaching portion), and a desired lens system can be obtained.
第１図は、本発明のレンズ保持装置を示す概念図、第２
図，第３図は本発明のレンズ保持装置の第１実施例を示
し、第２図はレンズ保持装置の半截縦断面図、第３図は
レンズの半截平面図、第４図から第６図は本発明のレン
ズ保持装置の第２実施例から第４実施例をそれぞれ示す
半截縦断面図、第７図は、従来のレンズ保持装置を示す
半截縦断面図である。 10……レンズ 11……鏡枠 12……枠胴付部 13……間隙 14……テーパー部 15……接着剤FIG. 1 is a conceptual diagram showing a lens holding device of the present invention, and FIG.
FIGS. 3 and 3 show a first embodiment of the lens holding device of the present invention, FIG. 2 is a half-sectional view of the lens holding device, FIG. 3 is a half-cut plan view of the lens, and FIGS. 7 is a half-sectional view showing a second embodiment to a fourth embodiment of the lens holding device of the present invention, and FIG. 7 is a half-sectional view showing a conventional lens holding device. 10 Lens 11 Mirror frame 12 Frame body 13 Gap 14 Tapered part 15 Adhesive
Claims (1)
置決めしつつ接着剤を介して鏡枠内に固定するレンズ保
持装置において、上記枠胴付部に近づくにしたがって上
記レンズ外周面と鏡枠内周面との間隙が広くなるように
上記レンズ外周面又は／及び鏡枠内周面のスラスト方向
にテーパー部を設け、上記間隙に充填した接着剤を介し
て上記レンズを鏡枠内に固定するように構成したことを
特徴とするレンズ保持装置。1. A lens holding device for fixing a lens in a lens frame via an adhesive while positioning the lens in a thrust direction by a frame body portion, wherein the lens outer peripheral surface and the lens frame are moved closer to the frame body portion. A taper portion is provided in the thrust direction of the outer peripheral surface of the lens and / or the inner peripheral surface of the lens barrel so as to widen a gap with the inner peripheral surface, and the lens is fixed in the lens frame via an adhesive filled in the gap. A lens holding device characterized in that it is configured to perform
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219093A JP2805707B2 (en) | 1988-09-01 | 1988-09-01 | Lens holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63219093A JP2805707B2 (en) | 1988-09-01 | 1988-09-01 | Lens holding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0266506A JPH0266506A (en) | 1990-03-06 |
| JP2805707B2 true JP2805707B2 (en) | 1998-09-30 |
Family
ID=16730148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63219093A Expired - Lifetime JP2805707B2 (en) | 1988-09-01 | 1988-09-01 | Lens holding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805707B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209411A (en) * | 1989-09-19 | 1991-09-12 | Asahi Optical Co Ltd | Holding structure for optical parts |
| US10191189B2 (en) | 2012-09-14 | 2019-01-29 | Konica Minolta, Inc. | Optical lens, optical lens unit, and imaging device |
| US9939607B2 (en) | 2012-12-05 | 2018-04-10 | Konica Minolta, Inc. | Lens barrel, image obtaining unit, and method for assembling same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6149319U (en) * | 1984-09-04 | 1986-04-02 |
-
1988
- 1988-09-01 JP JP63219093A patent/JP2805707B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0266506A (en) | 1990-03-06 |
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