WO2004051339A1 - レンズ鏡筒および撮像装置 - Google Patents
レンズ鏡筒および撮像装置 Download PDFInfo
- Publication number
- WO2004051339A1 WO2004051339A1 PCT/JP2003/015473 JP0315473W WO2004051339A1 WO 2004051339 A1 WO2004051339 A1 WO 2004051339A1 JP 0315473 W JP0315473 W JP 0315473W WO 2004051339 A1 WO2004051339 A1 WO 2004051339A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- fixing
- hole
- fixed
- support
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Definitions
- the present invention relates to a lens barrel and an imaging device each having a plastic lens fixed to a lens holding unit.
- the lens is fixed to the lens barrel by caulking a lens holding portion on the lens barrel side, which is a molding material.
- a lens holding portion on the lens barrel side which is a molding material.
- Glass lenses have high component costs, 2. Glass lenses are heavy, and 3. Glass lenses have no degree of freedom in terms of shape, and must be crimped such as bosses and holes. Is impossible. Therefore, the only option is to crimp the lens barrel. The glass lens requires a space for caulking outside the optically necessary outer diameter, and it becomes heavier by that amount.
- Patent Document 1 a mounting method in which a plastic lens is pressed against the lens barrel by a panel force using a leaf spring is disclosed (for example, Patent Document 1). reference).
- FIG. 6 is a cross-sectional view showing the outer shape of the plastic lens
- FIG. 7 is a front view showing the outer shape of the lens holding portion.
- the plastic lens 3 is fixed to the lens holding section 2 by force squeezing.
- the plastic lens 3 is made of an epoxy-based thermoplastic resin (for example, ZEONEX, 480S, trade name of Zeon Corporation of Japan).
- the lens holding section 2 is provided with three support holes, that is, a reference hole 8, a loosening hole 9, and a long hole 10.
- the reference hole 8 is made of ⁇ ⁇ + ⁇ . 0 1 mm to 0, is almost the same size as the fixing protrusion 4 of the plastic lens 3, and is positioned by being fitted to the fixing protrusion 4. You.
- the loosening hole 9 is made of ⁇ 1.2 mm + 0.03 mm to +0.01 mm, and is formed larger than the fixing protrusion 5 of the plastic lens 3, and the fixing protrusion 5 is inserted. Has a play in the plane direction.
- the elongated hole 10 is made of ( ⁇ + ⁇ .0.15 mm-0) XI.2, and the fixing protrusion 6 of the plastic lens 3 is fitted to rotate the lens 3 in the rotation direction. Position.
- the fixing projections 4 to 6 are fitted with the corresponding support holes, and the fixing projections 4 to 6 are thermally deformed with the pins of a caulking jig, and crushed into an umbrella shape, whereby the lens 3 is formed. It is swaged and fixed to the lens holder 2.
- Patent Document 1 Japanese Patent Application Laid-Open No. 58-187790
- Patent Document 2 Japanese Unexamined Patent Publication No. 2002-182080
- the present invention has been made to solve such a problem. That is, the present invention provides a plastic lens having first to fourth fixing protrusions provided on the periphery, and first to fourth support holes provided respectively corresponding to the lens fixing protrusions.
- the first to fourth fixing protrusions of the first to fourth fixing protrusions are arranged at intervals capable of supporting three points on the outer peripheral portion of the lens;
- the projection is disposed on a line connecting the first fixed projection and the center of the lens, and the first support hole corresponding to the first fixed projection is formed of an opening having substantially the same size as the first fixed projection.
- the second and third fixing projections are almost the same size
- the second and third support holes are almost the same size
- the second and third support holes are provided as loosening holes consisting of openings larger than the second and third fixing projections.
- fourth support hole corresponding to the fourth fixed projections is made of a first support hole long hole provided to extend in the direction of.
- the first fixing projection and the fourth fixing projection, and the corresponding first and fourth support holes are arranged so as to face each other on a straight line connecting the center of the lens. Therefore, the lens can be positioned with the highest accuracy by these fittings.
- the first to third fixing projections and the first to third support holes are arranged at intervals capable of supporting three points in the circumferential direction of the lens, and the second and third fixing projections are almost the same. The size of the second and third Since the support holes are almost the same size, these caulking conditions can be made the same.
- FIG. 1 is a partially exploded perspective view illustrating a lens barrel according to the present embodiment.
- 2A and 2B are diagrams for explaining the external shape of the lens.
- FIG. 3 is a plan view illustrating the outer shape of the lens holding unit.
- FIGS. 4A to 4C are plan views showing the relationship between each support hole and each fixing projection.
- FIGS. 5A and 5B are cross-sectional views showing a state where the fixing projection is caulked.
- FIG. 6 is a cross-sectional view showing the external shape of a conventional plastic lens.
- FIG. 7 is a front view showing the external shape of a conventional lens holding unit.
- the present invention is applied to a lens barrel (main barrel) of an imaging apparatus, for example,
- FIG. 1 is a partially exploded perspective view illustrating a lens barrel according to the present embodiment
- FIG. 2 is a view for explaining the outer shape of the lens
- FIG. 2A is a plan view
- FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A
- FIG. 3 is a plan view for explaining the outer shape of the lens holding portion. It is.
- the lens barrel 1 constitutes an intermediate lens barrel of a lens system (not shown), and is made of, for example, a polycarbonate resin. Are closed by the opened lens holding part 2.
- a plastic lens 3 is fixed to the lens holding section 2.
- the lens holding portion 2 of the present embodiment is provided with four support holes, one of which is composed of a reference hole 8, two loosening holes 9, 10 and one long hole 81. .
- the reference hole 8 and the two loose fitting holes 9 and 10 are arranged at an interval of about 120 ° in the circumferential direction of the lens 3, and the long hole 81 is the reference hole 8 and 180. They are arranged at opposing positions. Further, the long hole 81 is formed to be long along the direction of the reference hole 8.
- the lens 3 has a lens portion 3a formed of a curved surface having a predetermined shape, a flange portion 3b provided on an outer peripheral portion thereof, and an optical axis from the flange portion 3b.
- the four fixing projections 4, 5, 6, 41 which project in the direction are formed on the body.
- the fixing protrusions 4, 5, 6, and 41 are arranged along the outermost periphery of the flange portion 3a so as to be able to support three points at an interval of about 120 °.
- the reference holes 8 and the loose mating holes 9 and 10 of the lens support 2 described above correspond to the respective holes.
- the fixing protrusion 41 is arranged at a position 180 ° opposite to the fixing protrusion 4 along the outermost periphery of the flange portion 3b, and corresponds to the elongated hole 81 of the lens holding portion 2 described above. It has become.
- the material of the lens 3 is an acryl-based thermoplastic resin (for example, ZEONEX, 48OS: trade name of Zeon Corporation).
- the surface of the lens portion 3a is coated with an antireflection film.
- the size of the fixing protrusions 4, 5, 6, and 41 provided on the lens 3 is, for example, 1.5 mm to 0.01 mm to 0.01 mm.
- the portion of the lens 3 that is located above the fixing protrusion 4 in the figure and protrudes outward from the flange portion 3b is an inlet for injecting resin into the mold when the lens 3 is molded.
- the shape and position of the fixing protrusions 4, 5, 6, 41 are set freely to fill the mold with resin from the gate 3c. It is possible to do.
- a mounting hole 7 for the lens 3 is formed in a central portion of the lens holding portion 2, and a peripheral portion of the mounting hole 7 penetrates the lens holding portion 2 in the optical axis direction.
- the reference hole 8 and the loose mating holes 9 and 10 are respectively arranged at intervals of about 120 ° in the circumferential direction, and the long hole 81 is about 1 ° in the circumferential direction with respect to the reference hole 8. It is located at an opposite position at 80 °. Further, the long hole 81 is formed to be long along the direction of the reference hole 8.
- the reference hole 8 is a support hole serving as a reference for positioning when the lens 3 is mounted, and has a diameter substantially the same size as the fixing projection 4 (for example, ⁇ ⁇ 0.5 mm + 0.025 mm to 10 mm). .05 mm).
- FIG. 4A is a plan view showing the relationship between the reference hole 8 and the fixing protrusion 4.
- the two loose fitting holes 9 and 10 are circular holes having a diameter (for example, ⁇ 1.6 mm ⁇ 0.02 mm) larger than the diameter of the fixing protrusions 5 and 6.
- FIG. 4B is a plan view showing the relationship between the loosening hole 9 and the fixing protrusion 5.
- the long hole 81 is a hole long provided along the direction shown by a dashed line in the figure passing through the center of the reference hole 8, and is, for example, ( ⁇ 1.5 mm + 0.025 mm to 10. 0 0 5 mm) Provided in XI.2.
- the diameter of the long hole 81 in the short direction is almost the same as the diameter of the fixing protrusion 41 (for example, ⁇ 1.5 mm + 0.025 mm to +0.005 mm).
- FIG. 4C is a plan view showing the relationship between the long hole 81 and the fixing protrusion 41.
- a larger circular recess is formed at the opening edge of the reference hole 8, the loosening hole 9, and the opening 10, thereby forming a step 11. This is because the umbrella-shaped part does not protrude when the fixing That's why.
- the position of the fixing protrusion 4 and the reference hole 8 are adjusted, and the positions of the fixing protrusions 5 and 6 and the loosening holes 9 and 10 are set.
- the positions of the fixing protrusions 41 and the elongated holes 81 are also roughly adjusted, and each fixing protrusion is inserted into the support hole.
- the lens 3 is temporarily fixed to the lens holding section 2 of the lens barrel 1.
- the tips of the fixing projections 4, 5, 6 and 41 project outside from the reference hole 8, the loosening holes 9, 10 and the long holes 81.
- the lens 3 is arranged with reference to the fitting position between the reference hole 8 and the fixing protrusion 4, and the lens 3 is fixed by fitting the long hole 8 1 and the fixing protrusion 4 1.
- the rotation direction rotation direction about the fitting position of the reference hole 8 and the fixing projection 4.
- the lens 3 Since the positions of the long hole 81 and the fixing protrusion 41 are located approximately 180 ° along the circumference of the lens with respect to the positions of the reference hole 8 and the fixing protrusion 4, the lens 3 The accuracy in regulating the angle can be maximized.
- the tips of the fixing projections 4, 5, and 6 are caulked by an appropriate method, for example, by heat or ultrasonic waves, the tips of the fixing projections 4, 5, and 6 are crushed into an umbrella shape and the lens holding section 2 It can be fixed without rattling.
- FIG. 5 is a cross-sectional view showing a state in which the fixing protrusion is crimped.
- FIG. 5A shows a reference hole portion
- FIG. 5B shows a loosening hole portion. Due to this caulking, the tip portions of the fixing projections 4, 5, and 6 are crushed into an umbrella shape and deformed to form umbrella-shaped portions 4a, 5a, and 6a in the concave portion 11, whereby the lens 3 is secured and completely fixed to the lens holder 2.
- the lens 3 is fixed by three-point support by performing force crimping only at the three positions of the reference hole 8 and the fixing protrusion 4 and the two loose fitting holes 9 and 10 and the fixing protrusions 5 and 6. .
- the slot 81 and the fixing projection 41 restrict the position in the rotation direction while maintaining the degree of freedom in the slot direction only by fitting.
- two loose fitting holes 9 and 10 are fixed to the three reference holes 8 and the fixing protrusions 4 for performing force-staking and the two loose fitting holes 9 and 10 and the fixing protrusions 5 and 6. Since the protrusions 5 and 6 have the same size, the crimping conditions (eg, temperature, time, pressure) can be the same.
- the crimping condition of the fixing protrusion 4 with respect to the reference hole 8 is also a loose fitting hole. It can be made the same as the crimping condition of the fixing protrusions 5 and 6 for 9, 10. Therefore, caulking at three locations can be performed under the same conditions, and even if batch processing is performed, secure caulking can be realized.
- the sizes of the fixing protrusions and the support holes in the embodiment described above are merely examples, and the present invention is not limited thereto.
- the positions and the number of the fixing protrusions and the support holes described in the present embodiment are not limited to the above description, and at least the reference hole 8, the two loose holes 9, 10, and the length.
- the present invention can be realized even if other supporting holes and fixing projections are provided.
- the present invention has the following effects.
- the effect of switching from a glass lens to a plastic lens that is, weight reduction and cost reduction, can be achieved, and lens positioning accuracy can be improved.
- fixed by caulking In this case, the crimping condition of each fixing protrusion with respect to each support hole can be made the same, and even if all the fixing protrusions are collectively pressed, the lens can be securely fixed. As a result, it is possible to stably produce products with good productivity without any variation in the production process.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lens Barrels (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/536,060 US7453655B2 (en) | 2002-12-05 | 2003-12-03 | Lens barrel and image pickup apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-353222 | 2002-12-05 | ||
JP2002353222A JP3915683B2 (ja) | 2002-12-05 | 2002-12-05 | レンズ鏡筒および撮像装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004051339A1 true WO2004051339A1 (ja) | 2004-06-17 |
Family
ID=32463296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/015473 WO2004051339A1 (ja) | 2002-12-05 | 2003-12-03 | レンズ鏡筒および撮像装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7453655B2 (ja) |
JP (1) | JP3915683B2 (ja) |
KR (1) | KR101066148B1 (ja) |
CN (1) | CN100342257C (ja) |
WO (1) | WO2004051339A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4595581B2 (ja) * | 2005-02-21 | 2010-12-08 | 株式会社ジェイテクト | ハブユニット |
JP4790588B2 (ja) * | 2006-12-25 | 2011-10-12 | オリンパスイメージング株式会社 | レンズ鏡筒およびレンズ鏡筒の偏芯調整方法 |
JP5726504B2 (ja) * | 2010-12-16 | 2015-06-03 | 日東光学株式会社 | レンズユニットおよびバーコードスキャナ |
JP6295613B2 (ja) * | 2013-11-11 | 2018-03-20 | コニカミノルタ株式会社 | レンズユニットおよび撮像装置 |
JP6525510B2 (ja) * | 2014-05-29 | 2019-06-05 | キヤノン株式会社 | 光学装置および撮像装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0996523A (ja) * | 1995-10-02 | 1997-04-08 | Fuji Electric Co Ltd | 測距装置 |
JP2001051175A (ja) * | 1999-08-05 | 2001-02-23 | Sony Corp | レンズ鏡筒並びにその製造方法及びそのレンズ玉の位置決め装置 |
JP2002182089A (ja) * | 2000-12-19 | 2002-06-26 | Sony Corp | レンズの保持方法及びレンズ鏡筒 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3163789B2 (ja) * | 1992-09-18 | 2001-05-08 | ソニー株式会社 | カメラ用レンズ鏡筒 |
JPH08234125A (ja) * | 1995-02-23 | 1996-09-13 | Seiko Epson Corp | 光走査装置 |
US5870133A (en) * | 1995-04-28 | 1999-02-09 | Minolta Co., Ltd. | Laser scanning device and light source thereof having temperature correction capability |
JPH1114804A (ja) * | 1997-06-27 | 1999-01-22 | Fuji Photo Optical Co Ltd | プラスチックレンズ |
CN2412228Y (zh) * | 2000-01-18 | 2000-12-27 | 麦科特光电股份有限公司 | 便携式三用镜 |
JP3445546B2 (ja) * | 2000-01-26 | 2003-09-08 | ペンタックス株式会社 | レンズの偏心調整装置 |
JP3733004B2 (ja) * | 2000-06-19 | 2006-01-11 | アルプス電気株式会社 | 光学部品及びその製造方法 |
TW523924B (en) * | 2001-01-12 | 2003-03-11 | Konishiroku Photo Ind | Image pickup device and image pickup lens |
-
2002
- 2002-12-05 JP JP2002353222A patent/JP3915683B2/ja not_active Expired - Fee Related
-
2003
- 2003-12-03 US US10/536,060 patent/US7453655B2/en not_active Expired - Fee Related
- 2003-12-03 WO PCT/JP2003/015473 patent/WO2004051339A1/ja active Application Filing
- 2003-12-03 KR KR1020057009460A patent/KR101066148B1/ko not_active IP Right Cessation
- 2003-12-03 CN CNB2003801049513A patent/CN100342257C/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0996523A (ja) * | 1995-10-02 | 1997-04-08 | Fuji Electric Co Ltd | 測距装置 |
JP2001051175A (ja) * | 1999-08-05 | 2001-02-23 | Sony Corp | レンズ鏡筒並びにその製造方法及びそのレンズ玉の位置決め装置 |
JP2002182089A (ja) * | 2000-12-19 | 2002-06-26 | Sony Corp | レンズの保持方法及びレンズ鏡筒 |
Also Published As
Publication number | Publication date |
---|---|
US20060125951A1 (en) | 2006-06-15 |
CN1720475A (zh) | 2006-01-11 |
CN100342257C (zh) | 2007-10-10 |
US7453655B2 (en) | 2008-11-18 |
JP2004184787A (ja) | 2004-07-02 |
KR101066148B1 (ko) | 2011-09-20 |
JP3915683B2 (ja) | 2007-05-16 |
KR20050086842A (ko) | 2005-08-30 |
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