WO2018049848A1 - 镜片固定结构、投影设备及光路系统 - Google Patents
镜片固定结构、投影设备及光路系统 Download PDFInfo
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- WO2018049848A1 WO2018049848A1 PCT/CN2017/086872 CN2017086872W WO2018049848A1 WO 2018049848 A1 WO2018049848 A1 WO 2018049848A1 CN 2017086872 W CN2017086872 W CN 2017086872W WO 2018049848 A1 WO2018049848 A1 WO 2018049848A1
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- WIPO (PCT)
- Prior art keywords
- lens
- boss
- fixing structure
- lens fixing
- slot
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- 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.)
- Ceased
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- 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
Definitions
- the utility model relates to an optical technology, in particular to a lens fixing structure, a projection device applying the lens fixing structure, and an optical path system applying the lens fixing structure.
- the glue is usually directly bonded by using glue; or as shown in FIG. 1, the ring 13 of the lens fixing structure 10 is pressed against the lens 11 and then used. Glue sticks to the ring 13.
- this method is relatively simple, if glue is used for bonding, glue overflow will occur, which will affect the light transmittance; and the bond will be weak, which will cause the lens 11 to easily fall off and tilt, which seriously affects the product quality.
- the thickness of the ring 13 is required to be thin, otherwise it is easy to interfere with the light source (not shown).
- the thickness of the ring 13 is too thin, it is not conducive to processing and molding, and is not conducive to product stability.
- the fixing between the ring 13 and the lens 11 is not strong, and the relative sliding is easy to occur, and the lens 11 is also detached and tilted, which affects the normal use of the product.
- the main object of the present invention is to provide a lens fixing structure, which aims to obtain a lens fixing structure which is convenient in processing and installation, stable in structure and low in cost.
- the lens fixing structure of the present invention comprises a lens and a fixing frame, the lens comprises a curved end and at least one boss, and the curved end comprises a curved surface and a bottom surface connected to the protruding bottom.
- the fixing frame is provided with a slot for interference fit with the boss, the boss is engaged with the slot, and the bottom surface is attached to a surface of the fixing frame facing the arc end.
- the boss is a cylinder, and the slot is matched with the boss.
- the boss is a truncated cone body, and a cross-sectional area of the free end of the boss is smaller than a cross-sectional area of the connecting end, and the slot is matched with the boss.
- a first chamfer is provided at a junction of the boss and the bottom surface
- a second chamfer is provided at a junction of a surface of the fixing frame facing the arcuate end and a peripheral wall of the slot.
- the first chamfer is complementary to the second chamfer.
- the boss is provided with two protrusions, and the two protrusions are arranged along a center line direction of the arcuate end, and a minimum cross section of the boss near the arcuate end is larger than a distance from the arc end.
- the largest cross section of the boss is provided with two slots, and the two slots are connected to form a counterbore and are matched with the two bosses.
- the device further includes a resisting member, wherein the extending direction of the resisting member is disposed at an angle with the bottom surface of the curved end, the one end of the resisting member is pressed against the inner side wall of the fixing frame, and the other end is resisted. Said arc surface.
- a first lens and a second lens are further included, the first lens abuts the resisting member, and another resisting member is disposed between the first lens and the second lens.
- the two lenses press the first lens against the abutting member of the lens by pressing the resisting member.
- the boss is integrally formed with the curved end.
- Another object of the present invention is to provide a projection apparatus including a body, a light source, and a lens fixing structure.
- the lens fixing structure is fixed to the body and disposed adjacent to the light source.
- the lens fixing structure is as described above.
- the lens fixing structure is as described above.
- a further object of the present invention is to provide an optical path system comprising an optical film, a light source and a lens fixing structure, the optical film being located between the lens fixing structure and the light source, and being relatively adjacent to the light source It is provided that the lens fixing structure is the above-mentioned lens fixing structure.
- the lens fixing structure has the lens as a curved end and a boss, and the bottom end of the curved end and the boss are connected, and a slot with an interference fit of the boss is arranged on the fixing frame, By snapping the boss into the slot, the radial direction of the boss of the lens can be limited.
- the surface of the fixed frame facing the curved end is positioned with the bottom surface to limit the axial direction of the projection of the lens, thereby firmly fixing the lens to the fixing frame, and the assembly is simple and the structure is stable, so that the quality of the product is stable.
- the glue bonding in the existing structure is eliminated, the glue is prevented from contaminating the lens, the light transmittance is good, and the cost is saved.
- FIG. 1 is a schematic view of a prior art lens fixing structure
- FIG. 2 is an exploded view of an embodiment of a lens fixing structure of the present invention
- Figure 3 is an exploded view of another embodiment of the lens fixing structure of the present invention.
- Figure 4 is a cross-sectional view showing still another embodiment of the lens fixing structure of the present invention.
- Figure 5 is a cross-sectional view showing still another embodiment of the lens fixing structure of the present invention.
- Lens fixing structure 315 First chamfer 11 lens 317 Connection surface 13 Ring 33 Fixed frame 30 Lens fixing structure 331 Slot 31 lens 333 Second chamfer 311 Curved end 335 Docking surface 3111 Curved surface 337 Second step 3113 Bottom 339 Positioning surface 313 Boss 35 Resistor 3131 Free end 351 First step 37 First lens 39 Second lens
- first, second, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.
- features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
- the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
- the term “riveting” is used unless otherwise specifically stated and limited.
- Connected”, “fixed”, etc. should be understood in a broad sense.
- “fixed” may be a fixed connection, or may be a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, It may also be indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise.
- the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
- the utility model provides a lens fixing structure 30.
- FIG. 1 is a schematic view of a lens fixing structure of the prior art
- FIG. 2 is an exploded view of an embodiment of the lens fixing structure of the present invention
- FIG. 3 is another embodiment of the lens fixing structure of the present invention.
- FIG. 4 is a cross-sectional view showing still another embodiment of the lens fixing structure of the present invention.
- FIG. 5 is a cross-sectional view showing still another embodiment of the lens fixing structure of the present invention.
- the lens fixing structure 30 includes a lens 31 and a fixing frame 33.
- the lens 31 includes a curved end 311 and at least one boss 313.
- the curved end 311 includes a curved surface 3111 and The bottom surface 3113 of the boss 313 is connected to the bottom frame 3113.
- the fixing frame 33 is provided with a slot 331 for interference fit with the boss 313.
- the boss 313 is engaged with the slot 331, and the bottom surface 3113 is attached to the surface of the fixing frame 33 facing the curved end 311. This face is the positioning face 339).
- the lens 31 can be an aspherical lens.
- the light emitted by the light source (not shown) can be corrected, so that the projected image is more clear and true, and does not occur larger. Distorted.
- the boss 313 of the lens 31 includes a circumferential surface (not shown) and a surface (not labeled) facing away from the curved end 311. The surface also has a certain curvature so as to have good light transmittance to the light source.
- the shape of the fixing frame 33 may be a cylindrical shape, or may be a hollow square or other shape. In the preferred embodiment, the position of the slot 331 is opened at the center of the fixing frame 33 to make the fixing structure more stable.
- the material of the fixing frame may be aluminum alloy, magnesium alloy or stainless steel, and generally a material with relatively high hardness is used.
- the lens fixing structure 30 has the lens 31 as the curved end 311 and the boss 313, and the curved end 311 and the boss 313 have a bottom surface 3113 connected thereto, and is disposed on the fixing frame 33 and the boss
- the 313 interference fit slot 331 can restrict the radial direction of the boss 313 of the lens 31 by engaging the boss 313 into the slot 331.
- the positioning surface 339 of the fixing frame 33 and the bottom surface 3113 are positioned to restrict the axial direction of the boss 313 of the lens 31, so that the lens 31 does not move in the axial direction and the radial direction, but is firmly fixed and fixed. Box 33, the assembly is simple and the structure is stable, so that the quality of the product is stable.
- the glue bonding in the existing structure is eliminated, the glue is prevented from contaminating the lens, the light transmittance is good, and the cost is saved.
- the boss 313 is integrally formed with the curved end 311.
- the processing technology of the optical lens is divided into a rough grinding process and a fine grinding process, and the rough grinding process includes the steps of: selecting materials, selecting optical glass in the embodiment; cutting, sawing according to the blank size of the lens; leveling, wiping The uneven trace left when sawing; the strip is glued according to the thickness direction of the lens; rounded, mounted on a special machine tool to directly grind the outer circle according to the size requirement; the open surface, the disc is ground into a spherical surface; the coarsely polished spherical surface, The spherical surface of the lens is subjected to preliminary rough grinding and chamfering.
- the process obtains a certain radius of curvature, center thickness, center deviation not exceeding a certain range, and the surface roughness reaches 3.2.
- the fine grinding process comprises the steps of: upper plate, that is, heating the lens and the adhesive at the same time, and coating the adhesive on the lens to uniformly and symmetrically bond the lens to the placement film; finely grinding the spherical surface, which can be performed by using the abrasive The surface of the lens is ground by the relative movement between the abrasive and the lens; the polishing is performed after the fine grinding, the fine-grained uneven layer and the crack layer are removed, the surface is transparent, and the shape and shape are refined to obtain optics.
- the edging glue used has a certain strength and is neutral, slightly hot, non-corrosive and easy to remove; finally coating, It may be a light transmissive film or a reflective film to increase the optical properties of the lens.
- the lens 31 in the technical solution needs to be improved in the process of centering and edging, that is, in the centering and edging process, after the centering process is completed, the lens is first cut into the shape of the lens 31, that is, the boss 313 is included. And the curved end 311, and then edging, so as to ensure that the bottom surface 3113 and the positioning surface 339 of the fixing frame 33 are eccentrically within the required range when positioning.
- the processing process is simple and easy to produce.
- the lens 31 is subjected to a cutting and edging process to obtain an integrally formed boss 313 and a curved end 311, which also makes the product stable in quality and optical performance.
- the boss 313 is a cylinder, and the slot 331 is adapted to the boss 313.
- the boss 313 is a cylinder, that is, the circumferential surface of the boss 313 is perpendicular to the bottom surface 3113 of the arcuate end 311.
- the peripheral wall of the slot 331 and the positioning surface 339 of the fixing frame 33 are also disposed perpendicularly.
- the structure can make the circumferential surface of the boss 313 and the peripheral wall of the slot 331 be firmly and smoothly engaged, and the combination of the bottom surface 3113 and the positioning surface 339 of the fixing frame 33 makes the positioning more accurate, thereby facilitating the lens.
- 31 is fixed to the fixing frame 33, and the fixing structure is stable and firm.
- the boss 313 is a truncated cone, and the cross-sectional area of the free end 3131 of the boss 313 is smaller than the cross-sectional area of the connecting end thereof, and the slot 331 is adapted to the boss 313.
- the free end 3131 of the boss 313 is the end of the boss 313 facing away from the curved end 311, and the connecting end thereof is the end where the boss 313 is connected to the bottom surface 3113.
- the boss 313 is a truncated cone body, and the cross-sectional area of the free end 3131 is smaller than the cross-sectional area of the connecting end, that is, the angle between the circumferential surface of the boss 313 and the bottom surface 3113 is set to an obtuse angle, and the slot 331 and the boss When the 313 is fitted, the angle between the peripheral wall of the slot 331 and the positioning surface 339 of the fixing frame 33 is also an obtuse angle.
- the arrangement of the structure makes the boss 313 snap into the slot 331 more smoothly, and further facilitates the fixed installation.
- the bottom surface 3113 and the positioning surface 339 of the fixing frame 33 are used for accurate positioning, and the distance between the lens 31 and the light source is limited, thereby achieving a good optical effect, so the surface flatness of the two is required to be high.
- the surface flatness of both should be kept the same and meet the assembly standards.
- connection between the boss 313 and the bottom surface 3113 is provided with a first chamfer 315, and the surface of the fixing frame 33 facing the curved end 311 (ie, the positioning surface 339)
- a second chamfer 333 is provided at the junction of the peripheral wall of the slot 331, and the first chamfer 315 is complementary to the second chamfer 333.
- the dimensions of the first chamfer 315 and the second chamfer 333 are set according to the actual size of the lens fixing structure 30.
- the first chamfer 315 is a concavely connected concave shape
- the second chamfer 333 is a smooth connection.
- the boss 313 is provided with two, the two bosses 313 are arranged along the center line direction of the arcuate end 311, and the smallest cross section of the boss 313 near the arcuate end 311.
- two bosses 313 are disposed, and the two bosses 313 are arranged along the center line direction of the arcuate end 311, and are close to the arcuate end 311.
- the minimum cross section of the boss 313 is larger than the largest cross section of the boss 313 away from the arcuate end 311, and a connecting face 317 is formed between the two bosses 313.
- the two slots 331 are connected to form a counterbore, and a pair of joints 335 are formed between the two slots 331.
- the mating surface 335 also cooperates with the connecting surface 317 to further position the center line of the lens 31 at the slot 331.
- the restriction is made in the direction, and the two slots 331 and the two bosses 313 are locked, so that the lens 31 is fixed more firmly on the fixing frame 33, thereby making the product quality stable.
- the lens fixing structure 30 further includes a resisting member 35.
- the extending direction of the resisting member 35 is disposed at an angle with the bottom surface 3113 of the curved end 311, and one end of the resisting member 35 is pressed against the fixing frame.
- the inner side wall of 33 has the other end abutting the curved surface 3111.
- a resisting member 35 is provided, and the surface of the resisting member 35 facing the inner side wall is matched with the inner side wall of the fixing frame 33, and one end thereof is abutted against the arc.
- the other end of the surface 3111 is abutted against the inner side wall of the fixing frame 33, and the extending direction thereof is disposed at an angle with the bottom surface 3113 of the curved end 311, that is, the extending direction is any point on the curved surface 3111 and the center of the lens 31.
- the pressure applied to the lens 31 along the axis of the boss 313 toward the light source can be decomposed, and the lens 31 can be prevented from being detached from the slot 331 in the direction away from the light source, thereby ensuring the secure mounting of the lens 31 without falling off. , shifting, etc., so that the quality of the device to which the lens fixing structure 30 is applied is stable, and the presented image is more clear and true.
- the resisting member 35 and the fixing frame 33 are further provided with a first step 351 and a second step 337 which are butted against each other, thereby preventing the resisting member 35 from being opposite. Sliding on the inner side wall of the fixing frame 33 makes the pressing force of the resisting member 35 against the lens 31 more stable, and further enhances the stability of the lens 31.
- the lens fixing structure further includes a first lens 37 and a second lens 39 .
- the first lens 37 abuts the resisting member 35
- another resisting member 35 is disposed between the first lens 37 and the second lens 39 .
- the second lens 39 presses the first lens 37 against the abutting member 35 of the lens 31 by pressing the resisting member 35.
- the shape of the fixing frame 33 may be a hollow cylindrical shape, and the lens 31, the resisting member 35, the first lens 37, the other resisting member 35 and the second lens 39 are sequentially disposed in the fixing frame 33.
- the arrangement of the structure enables the second lens 39 to have a pressing and fixing action on the first lens 37 and the lens 31, further strengthen the fixing of the lens 31, and simplify the fixing manner.
- the outer side of the second lens 39 is provided with a closing plate (not shown) provided with a clamping table (not shown) for pressing the second lens 39, and fixing the closing plate to the fixing frame 33 by screwing, thereby realizing
- the fixing of the entire lens for correcting the light source is simple and coherent, and the structure is stable, and the service life of the product is effectively ensured.
- Another object of the present invention is to provide a projection device (not shown) including a body (not shown), a light source (not shown), and a lens fixing structure 30.
- the lens fixing structure 30 is fixed to the body and the light source. Relative to the adjacent arrangement, the lens fixing structure 30 is the lens fixing structure 30 described above. Since the lens fixing structure 30 of the projection apparatus adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are not repeated herein.
- Still another object of the present invention is to provide an optical path system (not shown) including an optical film (not shown), a light source (not shown), and a lens fixing structure 30, which is located in the lens fixing structure 30.
- the optical film may be a light guide sheet, a diffusion sheet, a brightness enhancement sheet and the like, and the lens fixing structure 30 is the lens fixing structure 30 described above. Since the lens fixing structure 30 of the optical path system adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought about by the technical solutions of the above embodiments are not repeatedly described herein.
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Abstract
一种镜片固定结构（30）、投影设备及光路系统，该镜片固定结构（30）包括镜片（31）与固定框（33），镜片（31）包括弧面端（311）和至少一凸台（313），弧面端（311）包括弧面（3111）和与凸台（313）相连的底面（3113），固定框（33）开设有与凸台（313）过盈配合的槽孔（331），凸台（313）卡入槽孔（331），底面（3113）贴合固定框（33）面向弧面端（311）的表面（339），可得到一种加工与安装方便、结构稳定且成本低的镜片固定结构（30）。
Description
本实用新型涉及一种光学技术，特别涉及一种镜片固定结构，应用所述镜片固定结构的投影设备，及应用所述镜片固定结构的光路系统。
随着光学技术的不断发展更新，对光学镜片的加工工艺要求也是越来越高。特别是LED、激光等光源的广泛应用，使得类似非球面镜片的诞生，此类镜片R值比较小，焦距比较短，故需要光源紧贴着镜片进行使用。
目前将这种非球面镜片安装固定到设备中时，通常情况下会使用胶水直接进行粘结；或如图1所示，将镜片固定结构10的圆环13压设于镜片11，然后再用胶水粘住圆环13。这种方式虽然比较简单，但使用胶水粘结，会出现胶水溢出，影响透光性；且会粘结不牢固，导致镜片11容易脱落、倾斜，严重影响产品质量。同时，使用圆环13压设时要求其厚度很薄，否则很容易跟光源（未图示）产生干涉。然而无论是塑胶件还是钣金件，如果圆环13的厚度太薄不利于加工与成型，也不利于产品稳定。此外，圆环13与镜片11之间固定不牢固，易发生相对滑动，也会使得镜片11脱落、倾斜，影响产品正常使用。
本实用新型的主要目的在于提供一种镜片固定结构，旨在得到一种加工与安装方便、结构稳定且成本低的镜片固定结构。
为实现上述目的，本实用新型提出的镜片固定结构，包括镜片与固定框，所述镜片包括弧面端和至少一凸台，所述弧面端包括弧面和与所述凸台相连的底面，所述固定框开设有与所述凸台过盈配合的槽孔，所述凸台卡入所述槽孔，所述底面贴合所述固定框面向所述弧面端的表面。
可选地，所述凸台为圆柱体，所述槽孔与所述凸台相适配。
可选地，所述凸台为圆台体，且所述凸台自由端的截面积小于其连接端的截面面积，所述槽孔与所述凸台相适配。
可选地，所述凸台与所述底面的连接处设有第一倒角，所述固定框面向所述弧面端的表面与所述槽孔的周壁的连接处设有第二倒角，所述第一倒角与所述第二倒角互补吻合。
可选地，所述凸台设有两个，两所述凸台沿所述弧面端的中心线方向排列设置，且靠近所述弧面端的凸台的最小横截面大于远离所述弧面端的凸台的最大横截面，所述槽孔设有两个，两所述槽孔相连形成一沉孔，并与两所述凸台相适配。
可选地，还包括抵持件，该抵持件的延伸方向与所述弧面端的底面呈夹角设置，所述抵持件一端抵压所述固定框的内侧壁，另一端抵持所述弧面。
可选地，还包括第一透镜与第二透镜，所述第一透镜抵接所述抵持件，所述第一透镜与第二透镜之间设置另一所述抵持件，所述第二透镜通过抵压该抵持件使所述第一透镜抵压靠近所述镜片的抵持件。
可选地，所述凸台与所述弧面端一体成型。
本实用新型的另一目的在于提出一种投影设备，包括机体、光源及镜片固定结构，所述镜片固定结构固定于所述机体，并与所述光源相对临近设置，所述镜片固定结构为上述的镜片固定结构。
本实用新型的又一目的在于提出一种光路系统，包括光学膜片、光源及镜片固定结构，所述光学膜片位于所述镜片固定结构与所述光源之间，并与所述光源相对临近设置，所述镜片固定结构为上述的镜片固定结构。
本实用新型技术方案中，镜片固定结构将镜片设为弧面端与凸台，弧面端与凸台之间有底面连接，并于固定框上设置与凸台过盈配合的槽孔，通过将凸台卡入槽孔内，可对镜片的凸台的径向方向进行限制。同时通过固定框面向弧面端的表面与底面进行定位，对镜片的凸台的轴向方向进行限制，从而将镜片牢固固定于固定框，装配简单且结构稳定，使得产品的质量稳定。同时免去了现有结构中的胶水粘结，避免了胶水污染镜片，透光性好，且节约成本。
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为现有技术镜片固定结构的示意图；
图2为本实用新型镜片固定结构一实施例的爆炸图；
图3为本实用新型镜片固定结构另一实施例的爆炸图；
图4为本实用新型镜片固定结构又一实施例的剖视图；
图5为本实用新型镜片固定结构再一实施例的剖视图。
附图标号说明：
| 标号 | 名称 | 标号 | 名称 |
| 10 | 镜片固定结构 | 315 | 第一倒角 |
| 11 | 镜片 | 317 | 连接面 |
| 13 | 圆环 | 33 | 固定框 |
| 30 | 镜片固定结构 | 331 | 槽孔 |
| 31 | 镜片 | 333 | 第二倒角 |
| 311 | 弧面端 | 335 | 对接面 |
| 3111 | 弧面 | 337 | 第二台阶 |
| 3113 | 底面 | 339 | 定位面 |
| 313 | 凸台 | 35 | 抵持件 |
| 3131 | 自由端 | 351 | 第一台阶 |
| 37 | 第一透镜 | 39 | 第二透镜 |
本实用新型目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
另外，在本实用新型中如涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本实用新型的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本实用新型中，除非另有明确的规定和限定，术语“铆接”
“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。
另外，本实用新型各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
本实用新型提出一种镜片固定结构30。
请参照图1至图5，图1为现有技术镜片固定结构的示意图；图2为本实用新型镜片固定结构一实施例的爆炸图；图3为本实用新型镜片固定结构另一实施例的爆炸图；图4为本实用新型镜片固定结构又一实施例的剖视图；图5为本实用新型镜片固定结构再一实施例的剖视图。
请参照图2，在本实用新型一实施例中，镜片固定结构30包括镜片31与固定框33，镜片31包括弧面端311和至少一凸台313，弧面端311包括弧面3111和与凸台313相连的底面3113，固定框33开设有与凸台313过盈配合的槽孔331，凸台313卡入槽孔331，底面3113贴合固定框33面向弧面端311的表面（设此面为定位面339）。
本实施例中，该镜片31可为非球面镜片，用于投影设备及光路系统时，可以对光源（未图示）发出的光进行修正，使投影的图像更加清晰真实，不会发生较大的扭曲。同时，镜片31的凸台313包括一圆周面（未标示）和一背离弧面端311的表面（未标示），该表面也是具有一定的弧度，以便对光源的透光性好。固定框33的形状可以是圆筒状，也可以是中空方体或者其他形状，优选实施例中，槽孔331的位置开设于固定框33的中心，以使该固定结构更加稳定。固定框的材质可以是铝合金、镁铝合金或不锈钢等，一般选用硬度比较高的材料。
本实用新型技术方案中，镜片固定结构30将镜片31设为弧面端311与凸台313，弧面端311与凸台313之间有底面3113连接，并于固定框33上设置与凸台313过盈配合的槽孔331，通过将凸台313卡入槽孔331内，可对镜片31的凸台313的径向方向进行限制。同时通过固定框33的定位面339与底面3113进行定位，对镜片31的凸台313的轴向方向进行限制，从而使镜片31不会发生轴向与径向方向的移动，而牢固固定于固定框33，装配简单且结构稳定，使得产品的质量稳定。同时免去了现有结构中的胶水粘结，避免了胶水污染镜片，透光性好，且节约成本。
具体地，凸台313与弧面端311一体成型。
一般情况下，光学镜片的加工工艺分为粗磨工艺及细磨工艺，粗磨工艺包括步骤：选料，本实施例中选取光学玻璃；切割，按镜片毛坯尺寸进行锯切；整平，抹去锯切时留下的不平痕迹；胶条，按镜片厚度方向胶成长条；滚圆，装在专用机床直接按尺寸要求磨外圆；开球面，把圆片磨成球面；粗磨球面，对镜片的球面进行初步的粗磨并倒角，该工艺得到一定的曲率半径、中心厚度、中心偏差不超过某一范围，且表面粗糙度达到3.2。
细磨工艺包括步骤：上盘，即将镜片与粘接胶同时加热，并将粘接胶涂覆在镜片上，将镜片均匀对称粘接到贴置膜；细磨球面，可利用散粒磨料进行，通过磨料与镜片之间的相对运动，对镜片表面进行研磨；抛光，在细磨清洗后进行，除去细磨的凹凸层和裂纹层，使表面通透光滑，并精修尺寸形状，获得光学表面和表面精度；下盘，抛光完成后加热下盘，并用汽油清洗；接着第二面上盘；细磨；抛光；下盘；然后是定心磨边，分为光学法定心和机械定心法，对于球面透镜，校正两球心连线与外圆的对称轴的偏差，使用的磨边胶须有一定的强度并呈中性，稍热即化，不具腐蚀且易清除；最后镀膜，可以是透光膜或反射膜，增加镜片的光学性能。
本技术方案中的镜片31需要对定心磨边这一工艺进行改进，即在定心磨边过程中，定心工序完成后，首先将镜片切成镜片31的形状，即包含有凸台313和弧面端311，再进行磨边，这样才能保证底面3113和固定框33的定位面339在进行定位时，偏心在要求范围之内。该加工工艺简单，便于生产。且对镜片31进行切削磨边处理得到一体成型的凸台313与弧面端311，也使得该产品的质量稳定，光学性能好。
请继续参照图2，凸台313为圆柱体，槽孔331与凸台313相适配。
本实施例中，凸台313为圆柱体，即凸台313的圆周面与弧面端311的底面3113垂直设置，此时槽孔331的周壁与固定框33的定位面339也为垂直设置。该结构可使凸台313的圆周面与槽孔331的周壁卡合地牢固、顺畅，且结合底面3113与固定框33的定位面339的配合，使得定位也较为准确，从而较方便地将镜片31固定于固定框33，且固定结构稳定牢固。
于另外一实施例中，凸台313为圆锥台，且凸台313的自由端3131的截面面积小于其连接端的截面面积，槽孔331与凸台313相适配。（凸台313的自由端3131即凸台313背离弧面端311的一端，其连接端即凸台313与底面3113相连的一端。）
该实施例中，凸台313为圆台体，且其自由端3131的截面面积小于其连接端的截面面积，即凸台313的周面与底面3113的夹角设置为钝角，槽孔331与凸台313相适配，则槽孔331的周壁与固定框33的定位面339的夹角也为钝角。该结构的设置，使得凸台313卡入槽孔331更加顺畅，进一步方便固定安装。同时，底面3113与固定框33的定位面339用于进行准确定位，对镜片31与光源之间的距离进行限制，从而达到良好的光学效果，故对两者的表面平整度要求很高，在进行加工时，应保持两者的表面平整度相同且符合装配标准。
出于安装方便和安全安装的考虑，请再次参照图2，凸台313与底面3113的连接处设有第一倒角315，固定框33面向弧面端311的表面（即定位面339）与槽孔331的周壁的连接处设有第二倒角333，第一倒角315与第二倒角333互补吻合。
本实施例中，第一倒角315与第二倒角333的尺寸需根据实际尺寸的镜片固定结构30进行设置，第一倒角315为光滑连接的内凹状，第二倒角333为光滑连接的外凸状，通过设置互补吻合的第一倒角315与第二倒角333，可以防止镜片31与固定框33在各自加工过程中，因出现的加工误差而使得装配不牢固的问题。同时也可以防止尖锐的结构误伤安装人员，提供安全安装的保证。
较佳的实施例中，请参照图3，凸台313设有两个，两凸台313沿弧面端311的中心线方向排列设置，且靠近弧面端311的凸台313的最小横截面大于远离弧面端311的凸台313的最大横截面，槽孔331设有两个，两槽孔331相连形成一沉孔，并与两凸台313相适配。
本实施例中，为更进一步地增强该镜片固定结构30的稳定性，设置两个凸台313，两个凸台313沿弧面端311的中心线方向排列设置，且靠近弧面端311的凸台313的最小横截面大于远离弧面端311的凸台313的最大横截面，则两个凸台313之间形成有一个连接面317。两槽孔331相连形成一沉孔，则两槽孔331之间也形成一对接面335，该对接面335与连接面317配合也起到定位作用，进一步对镜片31于槽孔331的中心线方向上进行限制，同时两个槽孔331与两个凸台313的卡固，使得镜片31于固定框33固定得更加牢固，从而使得产品质量稳定。
进一步地，请参照图4，该镜片固定结构30还包括抵持件35，该抵持件35的延伸方向与弧面端311的底面3113呈夹角设置，抵持件35一端抵压固定框33的内侧壁，另一端抵持弧面3111。
本实施例中，为进一步增强镜片31于固定框33的稳固性，设置抵持件35，该抵持件35面向内侧壁的表面与固定框33的内侧壁相匹配，将其一端抵持弧面3111，另一端抵持固定框33的内侧壁，且其延伸方向与弧面端311的底面3113呈夹角设置，即其延伸方向为弧面3111上任一一点与镜片31的中心的连线方向，可以分解出施加于镜片31沿凸台313轴线上朝向光源方向的压力，防止镜片31从槽孔331中沿背离光源的方向脱离，保证了镜片31的牢固性安装，不会发生脱落、移位等，从而使得应用该镜片固定结构30的装置质量稳定，所呈现的图像更加清晰真实。
此外，为增强抵持件35与固定框33之间的稳固性，该抵持件35与固定框33还设有相互对接的第一台阶351与第二台阶337，从而防止抵持件35相对于固定框33的内侧壁发生滑动，使抵持件35对镜片31的抵压力更加稳定，进一步增强镜片31的稳固性。
一般情况下，该类镜片31不会单独使用，通常会根据实际需求选择多个进行叠加使用。请参照图5，该镜片固定结构还包括第一透镜37与第二透镜39，第一透镜37抵接抵持件35，第一透镜37与第二透镜39之间设置另一抵持件35，第二透镜39通过抵压该抵持件35使第一透镜37抵压靠近镜片31的抵持件35。
本实施例中，固定框33的形状可为中空的圆筒状，镜片31、抵持件35、第一透镜37、另一抵持件35及第二透镜39依次设于该固定框33内，该结构的设置可使第二透镜39对第一透镜37及镜片31有抵压固定作用，进一步加强对镜片31的固定，且简化固定方式。第二透镜39的外侧设置有封闭板（未标示），该封闭板设置有压固第二透镜39的卡台（未图示），并通过螺纹连接将封闭板固定于固定框33，从而实现对光源进行修正的整个镜片的固定，该固定结构简单连贯，且该结构稳定，有效保证产品的使用寿命。
本实用新型的另一目的在于提出一种投影设备（未图示），包括机体（未图示）、光源（未图示）及镜片固定结构30，镜片固定结构30固定于机体，并与光源相对临近设置，镜片固定结构30为上述的镜片固定结构30。由于投影设备的镜片固定结构30采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
本实用新型的又一目的在于提出一种光路系统（未图示），包括光学膜片（未图示）、光源（未图示）及镜片固定结构30，该光学膜片位于镜片固定结构30与光源之间，并与光源相对临近设置，光学膜片可为导光片、扩散片及增光片等，所述镜片固定结构30为上述的镜片固定结构30。由于光路系统的镜片固定结构30采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
以上所述仅为本实用新型的优选实施例，并非因此限制本实用新型的专利范围，凡是在本实用新型的实用新型构思下，利用本实用新型说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本实用新型的专利保护范围内。
Claims (10)
1、固定结构，包括镜片与固定框，其特征在于，所述镜片包括弧面端和至少一凸台，所述弧面端包括弧面和与所述凸台相连的底面，所述固定框开设有与所述凸台过盈配合的槽孔，所述凸台卡入所述槽孔，所述底面贴合所述固定框面向所述弧面端的表面。
2、如权利要求1所述的镜片固定结构，其特征在于，所述凸台为圆柱体，所述槽孔与所述凸台相适配。
3、如权利要求1所述的镜片固定结构，其特征在于，所述凸台为圆台体，且所述凸台自由端的截面积小于其连接端的截面面积，所述槽孔与所述凸台相适配。
4、如权利要求2或3所述的镜片固定结构，其特征在于，所述凸台与所述底面的连接处设有第一倒角，所述固定框面向所述弧面端的表面与所述槽孔的周壁的连接处设有第二倒角，所述第一倒角与所述第二倒角互补吻合。
5、如权利要求1至3任一所述的镜片固定结构，其特征在于，所述凸台设有两个，两所述凸台沿所述弧面端的中心线方向排列设置，且靠近所述弧面端的凸台的最小横截面大于远离所述弧面端的凸台的最大横截面，所述槽孔设有两个，两所述槽孔相连形成一沉孔，并与两所述凸台相适配。
6、如权利要求5所述的镜片固定结构，其特征在于，还包括抵持件，该抵持件的延伸方向与所述弧面端的底面呈夹角设置，所述抵持件一端抵压所述固定框的内侧壁，另一端抵持所述弧面。
7、如权利要求6所述的镜片固定结构，其特征在于，还包括第一透镜与第二透镜，所述第一透镜抵接所述抵持件，所述第一透镜与第二透镜之间设置另一所述抵持件，所述第二透镜通过抵压该抵持件使所述第一透镜抵压靠近所述镜片的抵持件。
8、如权利要求1所述的镜片固定结构，其特征在于，所述凸台与所述弧面端一体成型。
9、一种投影设备，包括机体、光源及镜片固定结构，其特征在于，所述镜片固定结构固定于所述机体，并与所述光源相对临近设置，所述镜片固定结构为权利要求1至8任一所述的镜片固定结构。
10、一种光路系统，包括光学膜片、光源及镜片固定结构，其特征在于，所述光学膜片位于所述镜片固定结构与所述光源之间，并与所述光源相对临近设置，所述镜片固定结构为权利要求1至8任一所述的镜片固定结构。
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| CN102798955A (zh) * | 2011-05-23 | 2012-11-28 | 亚洲光学股份有限公司 | 投影机镜头 |
| CN103676062A (zh) * | 2012-09-14 | 2014-03-26 | 鸿富锦精密工业（深圳）有限公司 | 镜头模组 |
| CN105467547A (zh) * | 2014-09-26 | 2016-04-06 | 日本电产三协株式会社 | 透镜单元 |
| CN206096581U (zh) * | 2016-09-18 | 2017-04-12 | 深圳市光峰光电技术有限公司 | 镜片固定结构、投影设备及光路系统 |
-
2016
- 2016-09-18 CN CN201621061523.8U patent/CN206096581U/zh active Active
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2017
- 2017-06-01 WO PCT/CN2017/086872 patent/WO2018049848A1/zh not_active Ceased
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| US20060007564A1 (en) * | 2004-07-06 | 2006-01-12 | Fujinon Corporation | Lens holder for lens device and process of assembring lens device equipped with the lens holder |
| CN102227663A (zh) * | 2008-11-28 | 2011-10-26 | 住友电气工业株式会社 | 透镜单元以及车载用红外线透镜单元 |
| JP2012123220A (ja) * | 2010-12-09 | 2012-06-28 | Hoya Corp | レンズ固定構造 |
| CN102798955A (zh) * | 2011-05-23 | 2012-11-28 | 亚洲光学股份有限公司 | 投影机镜头 |
| CN103676062A (zh) * | 2012-09-14 | 2014-03-26 | 鸿富锦精密工业（深圳）有限公司 | 镜头模组 |
| CN105467547A (zh) * | 2014-09-26 | 2016-04-06 | 日本电产三协株式会社 | 透镜单元 |
| CN206096581U (zh) * | 2016-09-18 | 2017-04-12 | 深圳市光峰光电技术有限公司 | 镜片固定结构、投影设备及光路系统 |
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