JPH0529012U - Lens holding structure - Google Patents
Lens holding structureInfo
- Publication number
- JPH0529012U JPH0529012U JP7836091U JP7836091U JPH0529012U JP H0529012 U JPH0529012 U JP H0529012U JP 7836091 U JP7836091 U JP 7836091U JP 7836091 U JP7836091 U JP 7836091U JP H0529012 U JPH0529012 U JP H0529012U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- rigid
- leaf spring
- elastic
- holding structure
- 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.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
Abstract
(57)【要約】
【目的】レンズの保持構造に関し、軸ずれを最小限に抑
えながら変形を除去し、光学性能を劣化させないレンズ
の保持構造を提供する。
【構成】内周に、剛体突起2aと板ばね2bで成る弾性
突起を配設する筒枠2にレンズを嵌合したとき、そのレ
ンズの寸法ばらつき、環境よる寸法の変化に対しても、
剛体突起2aにより位置ぎめされ、板ばね2bからなる
弾性突起が容易に変形する
【効果】レンズ、筒枠両者の寸法ばらつきおよび温度、
湿度等の環境による寸法変化にも、レンズの軸ずれを最
小限としながら変形させることなく保持することがで
き、光学性能の劣化を防止できる。
(57) [Summary] [Object] To provide a lens holding structure that does not deteriorate optical performance by removing deformation while minimizing axial misalignment. [Structure] When a lens is fitted to a cylindrical frame 2 having an elastic projection made up of a rigid projection 2a and a leaf spring 2b on its inner circumference, the lens has a dimensional variation and a dimensional change due to the environment.
The elastic protrusion formed of the leaf spring 2b is easily deformed by being positioned by the rigid protrusion 2a. [Effect] Dimensional variations of both the lens and the barrel and temperature,
Even if the dimensions of the lens change due to the environment such as humidity, the lens can be held without being deformed while the axis shift is minimized, and deterioration of optical performance can be prevented.
Description
【0001】[0001]
本考案は、レンズ保持構造において、レンズ外周の保持構造に係り、特に、レ ンズの軸ずれを最小限にしながら変形を防止し、レンズの光学性能を劣化させな い保持構造に関する。 The present invention relates to a holding structure for a lens outer periphery in a lens holding structure, and more particularly to a holding structure that prevents deformation while minimizing lens axis misalignment and does not deteriorate the optical performance of the lens.
【0002】[0002]
従来、プラスチックレンズの外周部の保持構造は、特開昭60−32017号 公報に記載されているように、レンズの外周部と合成樹脂製の筒枠内に形成され た嵌合部とが弾性体を介して嵌合される。もしくは、実開平2−85412号公 報に記載されているように、レンズの外周部と合成樹脂製の筒枠内に形成された 嵌合部とが隙間なく、そして、互いに力が加わることなく嵌合するのが最も一般 的に用いられるレンズ変形を防止する保持構造である。 Conventionally, in the holding structure of the outer peripheral portion of a plastic lens, the outer peripheral portion of the lens and the fitting portion formed in the synthetic resin cylindrical frame are elastic, as described in JP-A-60-32017. Fitted through the body. Alternatively, as described in Japanese Utility Model Laid-Open No. 2-85412, there is no gap between the outer peripheral portion of the lens and the fitting portion formed in the synthetic resin cylinder frame, and no force is applied to each other. The most commonly used retaining structure is to prevent lens deformation.
【0003】[0003]
従来のレンズ外周の変形を防止する保持構造は、前述のように、レンズ外周部 と筒枠内の嵌合部とが隙間なく、そして、互いに力が加わることなく嵌合するか 、もしくは弾性体を介して嵌合する設計が一般的であるが、両者の寸法ばらつき ならびに温度、湿度等の環境変化に伴う嵌合後の寸法変化について考慮すると、 筒枠内の嵌合部とレンズ外周との間に隙間を設けるか、もしくは、嵌合部すべて に軸だしの困難な弾性体を介さざるを得ない。その結果、レンズは、その隙間や 弾性体から受ける力のアンバランスにより軸ずれを生じ、光学性能を著しく劣化 させる。そこで、レンズの軸ずれを防止するために、弾性体を用いず筒枠内嵌合 部の内径をレンズ外径より小さくして嵌合した場合、レンズは筒枠内嵌合部から 力を受けて変形を生じ著しく光学性能を劣化させてしまうという問題があった。 本考案の目的は、レンズの軸ずれを最小限としながら変形を除去し、光学性能 を劣化させないレンズの保持構造を提供することにある。 As described above, the conventional holding structure for preventing the deformation of the lens outer periphery has a structure in which the lens outer peripheral portion and the fitting portion in the cylindrical frame are fitted with each other without a gap and without applying a force to each other, or an elastic body. Although the design is such that the fitting between the fittings in the tube frame and the lens outer circumference is considered, considering the dimensional variation between the two and the dimensional change after fitting due to environmental changes such as temperature and humidity. There is no choice but to provide a gap between them or to insert an elastic body that makes it difficult to set the shaft in all fitting parts. As a result, the lens causes axial misalignment due to the gap between the lens and the force received from the elastic body, which significantly deteriorates the optical performance. Therefore, in order to prevent axial misalignment of the lens, if the inner diameter of the fitting portion inside the barrel is smaller than the outer diameter of the lens and the fitting is performed without using an elastic body, the lens receives force from the fitting portion inside the barrel. There is a problem in that the optical performance is significantly deteriorated due to the deformation. SUMMARY OF THE INVENTION An object of the present invention is to provide a lens holding structure that eliminates deformation while minimizing the axial displacement of the lens and does not deteriorate the optical performance.
【0004】[0004]
上記目的を達成するために、本考案は筒枠内に等角度で形成された二点以上の 剛体突起と一点以上の弾性突起を用いてしまりばめでレンズ外周を保持すること により、レンズの軸ずれを最小とし、一点以上の弾性突起を設けることで、しま りばめで保持してもレンズ変形を生じないようにした。 In order to achieve the above object, the present invention uses two or more rigid protrusions and one or more elastic protrusions that are formed at an equal angle in a cylinder frame to hold the lens outer periphery with a tight fit so that the lens axis is By minimizing the displacement and providing one or more elastic protrusions, lens deformation does not occur even when held with a tight fit.
【0005】[0005]
本考案によれば、レンズの外周を筒枠内に等角度で形成された複数点の剛体突 起と一点以上の弾性突起により、しまりばめで保持することは、両者の寸法ばら つきおよび温度、湿度等の環境変化に伴う嵌合後の寸法の経時変化がおこっても 、レンズ外周と筒枠内の突起部はつねに隙間なく嵌合される。さらに複数点の剛 体突起を設けることにより、レンズは、その軸がつねにその突起で位置ぎめされ るため複数のレンズを組んだような場合に、その軸ずれを最小限に抑えることが できる。 According to the present invention, holding the outer periphery of the lens by a tight fit with a plurality of rigid body ridges and one or more elastic protrusions formed at an equal angle in the cylinder frame means that the dimensional variation and temperature Even if the dimensions change with time due to changes in the environment such as humidity, the outer circumference of the lens and the projection inside the barrel are always fitted together without a gap. Further, by providing rigid projections at a plurality of points, the axis of the lens is always positioned by the projections, so that when a plurality of lenses are assembled, the misalignment can be minimized.
【0006】 また、筒枠に一個所以上の弾性突起によって嵌合することは、レンズ外周をし まりばめで保持しても、弾性突起のみが大きく変形し、レンズが嵌合部から受け る反力は弱くなる。その結果、レンズの変形を最小限に抑えることができる。さ らにレンズ、筒枠の両者の寸法ばらつきおよび温度、湿度等の環境変化に伴い寸 法が経時的に変化して、嵌合度合いが変わった場合でも、レンズの変形を最小限 に抑えることができる。[0006] Further, if the lens frame is fitted with one or more elastic projections, even if the lens outer periphery is held by an interference fit, only the elastic projections are greatly deformed, and the lens receives from the fitting portion. The power becomes weak. As a result, the deformation of the lens can be minimized. In addition, even if the dimensions change over time due to dimensional variations of both the lens and barrel and environmental changes such as temperature and humidity, and the degree of fitting changes, the lens deformation should be minimized. You can
【0007】[0007]
以下、この考案の一実施例を図に基づいて説明する。図1でレンズ外周の保持 構造において、その筒枠構造について説明する。合成樹脂製の筒枠2内部の円周 上に二点の剛体突起2aと切欠き3を120度の等角度で形成し、切欠き3に板 ばね2bを筒枠2の中心方向に弧を描くように配置し、板ばね2bの弧の先端は 、突起2aの嵌合部4の内接円2cより0.1mm程度小さくなるように板ばね の長さをきめ、厚さはレンズ保持に十分であり、しかも、レンズの寸法変化を妨 げない弾性力を持つ厚さにする必要がある。 An embodiment of the present invention will be described below with reference to the drawings. The cylindrical frame structure of the holding structure for the lens outer periphery will be described with reference to FIG. Two rigid projections 2a and notches 3 are formed at an equal angle of 120 degrees on the circumference inside the cylinder frame 2 made of synthetic resin, and a leaf spring 2b is formed in the notch 3 in an arc toward the center of the cylinder frame 2. The leaf spring 2b is arranged as drawn, and the length of the leaf spring is determined so that the tip of the arc of the leaf spring 2b is about 0.1 mm smaller than the inscribed circle 2c of the fitting portion 4 of the protrusion 2a. The thickness must be sufficient and elastic enough not to prevent dimensional changes of the lens.
【0008】 図2に、図1に示した構造をもつ筒枠2にレンズ1を嵌合させた状態を示す。 レンズ1は、筒枠2の剛体突起2aの嵌合部4と板ばね2bによりつねぬにしま りばめで保持されており、レンズの軸は筒枠2の剛体突起2aの嵌合部により位 置ぎめされることで、複数のレンズの寸法ばらつき並びに軸だしの困難な弾性体 を介したしまりばめ構造においても、レンズの軸ずれを最小限に抑えることがる 。また、筒枠1の板ばね2bによる弾性突起は、容易に変形するため、レンズの 寸法ばらつきおよび環境による嵌合後の寸法変化においてもレンズには過大な締 め付け力は作用せずレンズを変形させることなく保持することができる。FIG. 2 shows a state in which the lens 1 is fitted in the cylindrical frame 2 having the structure shown in FIG. The lens 1 is held by a fitting part 4 of the rigid projection 2a of the tube frame 2 and a leaf spring 2b with a trough fit, and the axis of the lens is positioned by the fitting part of the rigid projection 2a of the tube frame 2. By being placed, the lens axis deviation can be minimized even in the interference fit structure with the dimensional variation of multiple lenses and the elastic body that makes it difficult to align the axis. Further, since the elastic protrusion of the plate spring 2b of the cylindrical frame 1 is easily deformed, the lens is not subjected to an excessive tightening force even when the dimension of the lens varies and the dimension changes after fitting due to the environment. It can be held without being deformed.
【0009】 なお、板ばね2bの高さdは板ばねが変形してもつねに筒枠1と接しない十分 な高さを取る必要がある。It should be noted that the height d of the leaf spring 2b needs to be high enough so that the leaf spring is not deformed and always comes into contact with the cylindrical frame 1.
【0010】 以上の実施例は、レンズ保持点が三個所の場合について説明したが、保持点が 四個所以上であっても同様の効果が得られる。ただし弾性突起部と剛体突起部の 配置は、レンズに加える力が釣り合う位置である必要がある。In the above embodiment, the case where the lens holding points are three is described, but the same effect can be obtained even when the lens holding points are four or more. However, the elastic protrusions and the rigid protrusions must be arranged so that the forces applied to the lens are balanced.
【0011】[0011]
本考案によれば、レンズ、筒枠両者の寸法ばらつきおよび温度、湿度等の環境 による寸法変化においても、軸ずれを最小限に保ちながら変形させることなく保 持できるので、光学性能の劣化を防止できる。 According to the present invention, even if the dimensional variation of both the lens and the barrel and the dimensional change due to the environment such as temperature and humidity can be maintained without deformation while keeping the axis deviation to a minimum, deterioration of optical performance is prevented. it can.
【0012】 また、これを実現するために必要な部品は一点なため、原価面でも安価で可能 である。Further, since only one part is required to realize this, the cost can be reduced.
【図面の簡単な説明】[Brief description of drawings]
【図1】本考案の一実施例の筒枠の説明図、FIG. 1 is an explanatory view of a cylinder frame according to an embodiment of the present invention,
【図2】図1の構造の筒枠にレンズを嵌合させた状態の
説明図、FIG. 2 is an explanatory view showing a state where a lens is fitted in the tubular frame having the structure shown in FIG.
【図3】従来の筒枠でのレンズ外周の保持の説明図。FIG. 3 is an explanatory view of holding an outer circumference of a lens in a conventional cylinder frame.
1…レンズ、2…筒枠、2a…剛体突起部、2b…板ば
ね(弾性突起部)、2c…内接円、3…切欠き部、4…
嵌合部、d…板ばね高さ。1 ... Lens, 2 ... Cylindrical frame, 2a ... Rigid protrusion, 2b ... Leaf spring (elastic protrusion), 2c ... Inscribed circle, 3 ... Notch, 4 ...
Fitting part, d ... Leaf spring height.
Claims (1)
ズと間隔環を配置したレンズ鏡筒において、筒枠内に、
等角度で配置された複数個所の剛体突起部と、一個所以
上の弾性突起部を円周を構成するように配置し、前記剛
体突起部の先端で前記レンズの外周をしまりばめで保持
することを特徴とするレンズの保持構造。1. A lens barrel in which a plurality of lenses and a spacer ring are arranged in a cylindrical barrel made of synthetic resin.
Arranging a plurality of rigid protrusions arranged at an equal angle and one or more elastic protrusions so as to form a circumference, and holding the outer periphery of the lens with an interference fit at the tip of the rigid protrusion. Lens holding structure characterized by.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7836091U JPH0529012U (en) | 1991-09-27 | 1991-09-27 | Lens holding structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7836091U JPH0529012U (en) | 1991-09-27 | 1991-09-27 | Lens holding structure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0529012U true JPH0529012U (en) | 1993-04-16 |
Family
ID=13659833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7836091U Pending JPH0529012U (en) | 1991-09-27 | 1991-09-27 | Lens holding structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0529012U (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002090604A (en) * | 2000-09-20 | 2002-03-27 | Enplas Corp | Lens unit |
JP2008058675A (en) * | 2006-08-31 | 2008-03-13 | Sanyo Electric Co Ltd | Optical device and projection type video display device using the same |
JP2014059337A (en) * | 2012-09-14 | 2014-04-03 | Ricoh Co Ltd | Optical scanner and image forming device |
WO2015115351A1 (en) * | 2014-01-28 | 2015-08-06 | コニカミノルタ株式会社 | Optical element unit, and manufacturing method for optical element unit |
WO2018020870A1 (en) * | 2016-07-25 | 2018-02-01 | 富士フイルム株式会社 | Lens unit, method for manufacturing lens unit, and imaging device |
-
1991
- 1991-09-27 JP JP7836091U patent/JPH0529012U/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002090604A (en) * | 2000-09-20 | 2002-03-27 | Enplas Corp | Lens unit |
JP2008058675A (en) * | 2006-08-31 | 2008-03-13 | Sanyo Electric Co Ltd | Optical device and projection type video display device using the same |
JP2014059337A (en) * | 2012-09-14 | 2014-04-03 | Ricoh Co Ltd | Optical scanner and image forming device |
WO2015115351A1 (en) * | 2014-01-28 | 2015-08-06 | コニカミノルタ株式会社 | Optical element unit, and manufacturing method for optical element unit |
JPWO2015115351A1 (en) * | 2014-01-28 | 2017-03-23 | コニカミノルタ株式会社 | Optical element unit and method of manufacturing optical element unit |
WO2018020870A1 (en) * | 2016-07-25 | 2018-02-01 | 富士フイルム株式会社 | Lens unit, method for manufacturing lens unit, and imaging device |
JPWO2018020870A1 (en) * | 2016-07-25 | 2019-03-14 | 富士フイルム株式会社 | Lens unit and imaging device |
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