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WO2020192253A1 - 镜头结构及其组装方法以及摄像模组 - Google Patents

镜头结构及其组装方法以及摄像模组 Download PDF

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Publication number
WO2020192253A1
WO2020192253A1 PCT/CN2020/072135 CN2020072135W WO2020192253A1 WO 2020192253 A1 WO2020192253 A1 WO 2020192253A1 CN 2020072135 W CN2020072135 W CN 2020072135W WO 2020192253 A1 WO2020192253 A1 WO 2020192253A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
object side
end surface
side end
light blocking
Prior art date
Application number
PCT/CN2020/072135
Other languages
English (en)
French (fr)
Inventor
胡德忠
吴俊甫
邹海荣
Original Assignee
南昌欧菲精密光学制品有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201920399036.XU external-priority patent/CN209765129U/zh
Priority claimed from CN201910236750.1A external-priority patent/CN111751951A/zh
Application filed by 南昌欧菲精密光学制品有限公司 filed Critical 南昌欧菲精密光学制品有限公司
Priority to US17/440,786 priority Critical patent/US20220163750A1/en
Publication of WO2020192253A1 publication Critical patent/WO2020192253A1/zh

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/003Light absorbing elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/02Bodies
    • G03B17/12Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets

Definitions

  • the present invention requires the priority of the Chinese patent application whose application date is March 27, 2019 and the application number is 2019102367501, and the Chinese patent application whose application date is March 27, 2019 and the application number is 201920399036X.
  • the present invention relates to the field of camera technology, in particular to a photosensitive component, a camera module and a mobile terminal.
  • the lens structure of a traditional camera module usually includes a lens barrel and a lens set in the lens barrel.
  • the front end of the lens barrel is used to block out incident light outside the design and prevent the outside light from entering the lens structure. Without changing the optical performance (with the size and number of lenses unchanged), the size of the lens structure of the above-mentioned structure is difficult to be further reduced, and it cannot meet the ever-increasing demand for high screen ratio of mobile terminals.
  • a photosensitive assembly capable of blocking the flow of the material forming the closure member to the photosensitive portion of the photosensitive chip is provided.
  • a lens structure including:
  • the lens barrel is a hollow structure with open ends, and the lens barrel includes an object side end surface and an image side end surface;
  • the lens group includes a plurality of lenses arranged in the lens barrel, the plurality of lenses are arranged in sequence from the image side end surface to the object side end surface, and are located at the end of the lens group and close to the object side
  • One of the lenses on the end surface is a first lens
  • the first lens includes a first optical portion and a first mounting portion connected to each other, and the first mounting portion is located on the outer periphery of the first optical portion;
  • the light blocking sheet is separated from the lens barrel, and the light blocking sheet is provided on the object side end surface and extends to the object side surface of the first mounting portion, and the object side surface of the first optical portion The object side of the light blocking sheet is exposed.
  • a method for assembling a lens structure includes the following steps:
  • the lens barrel is a hollow structure open at both ends, the lens barrel includes an object side end surface and an image side end surface;
  • a plurality of lenses are arranged in the lens barrel, and the plurality of lenses are arranged in sequence from the image-side end surface to the object-side end surface, and one of the lenses at the end and close to the object-side end surface is the first lens ,
  • the first lens includes a first optical portion and a first mounting portion that are connected, the first mounting portion is located on the outer periphery of the first optical portion;
  • a light blocking sheet is provided on the object side end surface, and the light blocking sheet extends to the object side surface of the first mounting portion, and the object side surface of the first optical portion is exposed from the object side surface of the light blocking sheet .
  • a camera module includes the above-mentioned lens structure.
  • FIG. 1 is a cross-sectional view of a lens structure provided by an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a lens structure provided by another embodiment of the present invention.
  • FIG. 3 is a partial exploded view of the lens structure shown in FIG. 2;
  • FIG. 4 is a cross-sectional view of a lens structure provided by another embodiment of the invention.
  • FIG. 5 is a cross-sectional view of a lens structure provided by another embodiment of the invention.
  • FIG. 6 is a cross-sectional view of a lens structure provided by another embodiment of the present invention.
  • FIG. 7 is a perspective view of a lens structure provided by another embodiment of the present invention.
  • FIG. 8 is an assembled state diagram of the lens structure shown in FIG. 7 in a first state
  • FIG. 9 is an assembled state diagram of the lens structure shown in FIG. 7 in a second state
  • FIG. 10 is a cross-sectional view of a lens structure provided by a conventional embodiment
  • FIG. 11 is a cross-sectional view of a lens structure provided by another conventional embodiment
  • FIG. 12 is a flowchart of a method for assembling a lens structure according to an embodiment of the present invention.
  • FIG. 13 is a flowchart of step S720 in FIG. 12;
  • FIG. 16 is an assembled state diagram of the lens structure in Embodiment 1 in the third state
  • FIG. 17 is a cross-sectional view of the assembled lens structure in Embodiment 1;
  • 19 is an assembled state diagram of the lens structure in the second embodiment in the second state
  • FIG. 20 is an assembled state diagram of the lens structure in Embodiment 2 in the third state
  • FIG. 23 is an assembled state diagram of the lens structure in the second embodiment in the third embodiment.
  • FIG. 26 is a cross-sectional view of a camera module provided by an embodiment of the invention.
  • a lens structure 20 provided by an embodiment of the present invention includes a lens barrel 200, a lens group 300 and a light blocking plate 400.
  • the lens barrel 200 is a hollow structure with open ends.
  • the lens barrel 200 includes an object side end surface 202 and an image side end surface 204 opposite to each other.
  • the opening of the lens barrel 200 on the object side end surface 202 is the first light-passing hole 200a
  • the opening of the lens barrel 200 on the image side end surface 204 is the second light-passing hole 200b, and light can enter the lens barrel through the first light-passing hole 200a
  • the light entering the lens barrel 200 passes through the lens assembly 300, and then enters the photosensitive chip 32 (please refer to FIG. 26) through the second light-passing hole 200b, thereby realizing imaging.
  • the lens group 300 includes a plurality of (two or more) lenses 300 a, and the plurality of lenses 300 a are arranged in sequence from the object side end surface 202 to the image side end surface 204.
  • Each lens 300a includes a connected optical part and a mounting part.
  • the mounting part is located on the outer periphery of the optical part.
  • the mounting part usually surrounds the optical part once, that is, the mounting part has a closed ring structure, which facilitates the assembly of the lens 300a in the lens barrel 200.
  • a lens 300a located at the end of the lens group 300 and close to the object-side end surface 202 is the first lens 310.
  • the first lens 310 includes a first optical portion 312 and a first mounting portion 314 connected to each other.
  • the first mounting portion 314 is located The outer periphery of the first optical part 312.
  • the light blocking plate 400 is separated from the lens barrel 200, that is, the light blocking plate 400 and the lens barrel 200 are formed separately.
  • the light blocking sheet 400 is disposed on the object side end surface 202 and extends to the object side surface 3142 of the first mounting portion 314.
  • the object side surface 3122 of the first optical portion 312 is exposed from the object side surface 402 of the light blocking sheet 400.
  • the integrally formed lens barrel 12 has a front end plate (object side end plate) 122 with a light hole 1222, and the lens barrel 12 is usually formed by injection molding of black plastic, so that The front end plate 122 is opaque and can block light to prevent light outside the design from entering the lens structure 10 (the light entering the lens structure 10 through the light hole 1222 is the light within the design). Due to the process limitation of the integral molding of the lens barrel 12 and the structural limitation of the lens 142 in the lens group 14, the thickness A (dimension in the direction of the optical axis 10a) of the front end plate 122 is difficult to be made small. The object side surface 1224 of the front end plate 122 is flush with the object side surface 1422 of the lens 142, that is, the lens 142 is completely contained in the lens barrel 12.
  • the lens structure shown in Figure 11 is obtained after various optimizations.
  • the thickness of the front plate 122 (the thickness between the inner wall and the outer wall of the light hole 1222 The thickness) is reduced, and the head size (head width) of the lens structure 10 is reduced from B in FIG. 10 to B1 in FIG. 11. If the thickness of the front end plate 122 continues to be reduced, the position of the dotted circle R shown in FIG. 11 will be too small to be formed. Therefore, the head width B1 of the conventional lens structure 10 cannot usually be further reduced. However, the head width of the lens structure 10 cannot be further reduced, resulting in the lens structure 10 being unable to meet the increasing demand for high screen ratio of mobile terminals.
  • the lens barrel 200 and the light blocking plate 400 are formed separately, and the thickness of the light blocking plate 400 (dimension in the direction of the optical axis 20a) is not affected by the integral molding of the lens barrel 200 Due to the limitation of the process and the structure of the lens 300a, the light-shielding sheet 400 with a small thickness can be used to achieve light shielding, so that the object side surface 3122 of the first optical portion 312 can be exposed from the object side surface 402 of the light-blocking sheet 400, thereby enabling the aforementioned
  • the head width B2 of the lens structure 20 is determined by the width (the size on the horizontal plane) of the exposed lens 300a. Compared with the head width B1 of the conventional lens structure 10, the head width B2 of the aforementioned lens structure 20 at least reduces the thickness of the lens barrel 200. Therefore, the aforementioned lens structure 20 has a smaller head width than the traditional lens structure 10 Features.
  • the head width B2 of the aforementioned lens structure 20 is 1-3 mm, that is, when the light blocking plate 400 has a ring structure (at this time, the middle of the light blocking plate 400 is a through hole), the light blocking plate
  • the diameter (inner diameter) of the through hole of 400 is 1-3 mm.
  • the outer diameter B3 of the object-side end surface 202 of the lens barrel 200 is 1.2-5 mm.
  • the thickness of the light blocking sheet 400 is 0.01-0.2 mm.
  • the head depth C or C1 of the lens structure 10 is the distance between the head and the step surface closest to the object side outside the lens barrel 12.
  • the conventional The head depth C or C1 of the lens structure is greater than or equal to the thickness A of the front end plate 122.
  • the light blocking sheet 400 is laminated on the object side end surface 202 of the lens barrel 200. In this way, it is not necessary to perform processes such as grooving on the object side end surface 202 of the planar structure, and the light blocking sheet 400 can be provided on the object side end surface 202.
  • the outer side wall of the light blocking sheet 400 is flush with the outer side wall of the lens barrel 200 adjacent thereto. In this way, the front end surface of the lens structure 20 can be flat. It can be understood that in some other embodiments, the outer side wall of the light blocking sheet 400 may also cooperate with the object side end surface 202 to form a step structure.
  • the object-side end surface 202 of the lens barrel 200 is provided with a mounting groove 2022, and the light blocking sheet 400 is provided in the mounting groove 2022. In this way, the positioning and installation of the light blocking sheet 400 are facilitated.
  • the object side 402 of the light blocking plate 400 is flush with the object side end 202 of the lens barrel 200. In this way, the front end surface of the lens structure 20 can be flat.
  • the object side surface 402 of the light blocking plate 400 is located between the object side end surface 202 of the lens barrel 200 and the object side surface 3122 of the first optical portion 312.
  • the object side surface 402 of the light blocking plate 400 is located between the object side end surface 202 and the image side end surface 204 of the lens barrel 200.
  • the maximum distance between the object side surface 3122 of the first optical portion 312 and the object side surface 402 of the light blocking plate 400 is the head of the lens structure 20 described above. ⁇ depth C2.
  • the maximum distance between the object side surface 3122 of the first optical portion 312 and the object side end surface 202 of the lens barrel 200 is the head depth C2 of the lens structure 20 described above. That is, the maximum distance between the higher one of the object side surface 402 of the light blocking plate 400 and the object side end surface 202 of the lens barrel 200 and the object side surface 3122 of the first optical portion 312 is the head depth C2 of the aforementioned lens structure 20 .
  • the head depth of the aforementioned lens structure 20 is 0.1-2 mm. Therefore, the aforementioned lens structure 20 has the characteristic of a small head depth compared to the conventional lens structure 10.
  • the lens barrel 200 is provided with a reference step surface 206 for supporting the object side surface of the lens 300a, and the direction from the reference step surface 206 to the object side end surface 202 is reverse. , The direction from the reference step surface 206 to the image side end surface 204 is a positive direction.
  • the portion of the lens barrel 200 between the reference step surface 206 and the image side end surface 204 is the first barrel portion 200a
  • the portion of the lens barrel 200 between the reference step surface 206 and the object side end surface 202 is the second barrel portion 200b.
  • the lenses in a barrel portion 200a constitute a first lens unit 302
  • the lenses in a second barrel portion 200b constitute a second lens unit 304.
  • the dashed line a in FIGS. 2 and 3 is the boundary line between the first cylindrical portion 200a and the second cylindrical portion 200b.
  • the inner diameter of the first cylindrical portion 200a gradually increases in the forward direction
  • the inner diameter of the second cylindrical portion 200b gradually increases in the reverse direction.
  • the lenses 300a in the first lens unit 302 can be assembled in the first barrel portion 200a in the order from small to large from the front
  • the lenses 300a in the second lens unit 304 can be assembled in the order from small to large from the reverse.
  • Assembled in the second cylinder part 200b when the first lens unit 302 has only one lens 300a, or when the sizes of the lenses 300a in the first lens unit 302 are the same, the inner diameter of the first cylindrical body portion 200a can also remain unchanged in the positive direction. . In the same way, the inner diameter of the second cylindrical portion 200b can also remain unchanged in the reverse direction.
  • the inner wall of the first cylindrical body portion 200a is stepped. At this time, the inner diameter of the first cylindrical body portion 200a gradually increases intermittently in the positive direction rather than continuously.
  • at least one first step surface 201 located between the reference step surface 206 and the image side end surface 204 is provided in the first cylinder portion 200 a. As shown in FIG. 3, the number of the first step surface 201 is three.
  • the inner wall of the second cylindrical portion 200b is stepped. At this time, the inner diameter of the second cylindrical portion 200b gradually increases in the opposite direction instead of continuously.
  • at least one second step surface 203 located between the reference step surface 206 and the object side end surface 202 is provided in the second cylinder portion 200b. As shown in FIG. 3, the number of the second step surface 203 is one.
  • a spacer 300b is provided between two adjacent lenses 300a.
  • the lens structure 20 further includes at least one spacer 300c, each spacer 300c is arranged between two adjacent lenses 300a, and a spacer 300b is arranged between the spacer 300c and the adjacent lens 300a.
  • the lens structure 20 includes a spacer 300 c located between the two lenses 300 a adjacent to the image side end surface 204.
  • the spacer 300c can be used to carry the last lens 300a And bear the pressure when assembling the last lens 300a.
  • the first step surface 201 is used to directly support the object side of the spacer 300b, and indirectly support the object side of the lens 300a and the spacer 300c.
  • the second step surface 203 closest to the object-side end surface 202 is idle and is not used for direct or indirect support of the lens 300a, the spacer 300b, and the spacer 300c, and the second step surface closest to the object-side end surface 202
  • a gap 500 is formed between the surface 203 and the light blocking sheet 400. The gap 500 can be used to dispense glue to increase the firmness of the connection between the lens 300a and the lens barrel 200.
  • the number of lenses 300 a of the first lens unit 302 is greater than or equal to one, and the number of lenses 300 a of the second lens unit 304 is greater than or equal to one. In some embodiments, the sum of the number of lenses 300 a of the first lens unit 302 and the number of lenses 300 a of the second lens unit 304 is less than or equal to 7. In this way, it is advantageous for assembly and for obtaining a small-sized lens structure 20.
  • the front end plate 122 not only has the effect of shielding light, but also has the effect of positioning and fixing the lens 142 in the lens barrel 12.
  • the following describes in detail how the lens 300a of the aforementioned lens structure 20 realizes the effect of positioning and fixing in the lens barrel 12.
  • At least the image side surface 3144 of the first mounting portion 314 of the first lens 310 is located in the lens barrel 200.
  • the outer edge of the object side 3142 of the first mounting portion 314 of the first lens 310 is flush with the object side end 202 of the lens barrel 200.
  • the first lens 310 is placed in the lens barrel 200. Under the action of gravity, the lens 320 adjacent to the first lens 310 is pressed downward. The side surface 3146 of the first lens 310 abuts against the inner wall of the lens barrel 200. That is, the first lens 310 can be positioned by the adjacent lens 320, and positioned and fixed by abutting and fitting with the inner wall of the lens barrel 200.
  • the image side surface 3144 of the first mounting portion 314 of the first lens 310 is provided with a positioning protrusion 3148, and the object side surface 322 of the lens 320 adjacent to the first lens 310 is provided with a positioning groove 324.
  • the positioning protrusion 3148 is locked in the positioning groove 324, thereby improving the positioning accuracy of the first lens 310.
  • the first lens 310 is placed in the lens barrel 200, and the first lens 310 is pressed down under the action of gravity.
  • the lens 320 adjacent to the first lens 310.
  • Glue is dispensed on the object side 3142 of the first mounting portion 314 of the first lens 310 and the inner wall of the lens barrel 200 to fix the first lens 310. That is, the first lens 310 can be fixed by dispensing glue, and the object side 3142 of the first mounting portion 314 of the first lens 310 and the inner wall of the lens barrel 200 are connected by an adhesive layer.
  • the light blocking sheet 400 has the effect of fixing the first lens 310 and the lens barrel 200 in addition to the light blocking effect. In some embodiments, the light blocking sheet 400 abuts against the object side 3142 of the first mounting portion 314 of the first lens 310 to fix the first lens 310 and the lens barrel 200.
  • the light blocking sheet 400 is a glue layer.
  • light blocking glue may be coated on the object side end surface 202 of the lens barrel 200 and the object side surface 3142 of the first mounting portion 314, and the light blocking glue is cured to form the light blocking sheet 400, thereby realizing the first lens 310 and the lens barrel 200 Securely fix.
  • the light blocking glue may be black glue.
  • the light blocking sheet 400 has a ring structure, and the light blocking sheet 400 is sleeved on the first lens 310.
  • the image side surface of the light blocking plate 400 includes a first annular connecting portion and a second annular connecting portion arranged and connected sequentially from the outside to the inside.
  • the first annular connecting portion is fixedly connected with the object side end surface 202 of the lens barrel 200, and the second annular connecting The portion abuts against the object side surface 3142 of the first mounting portion 314 of the first lens 310.
  • the inner edge of the image side surface of the light blocking plate 400 abuts against the object side surface 3142 of the first mounting portion 314 of the first lens 310, and the outer edge of the image side surface of the light blocking plate 400 is fixed to the object side end surface 202 of the lens barrel 200 connection.
  • a glue layer is provided between the outer edge of the image side surface of the light blocking sheet 400 and the object side end surface 202 of the lens barrel 200. In some embodiments, a glue layer is also provided between the inner edge of the image side surface of the light blocking sheet 400 and the object side surface 3142 of the first mounting portion 314 of the first lens 310. That is, the light blocking sheet 400 is respectively connected to the object side end surface 202 of the lens barrel 200 and the object side surface 3142 of the first mounting portion 314 by means of adhesive.
  • the object side end 202 of the lens barrel 200 is provided with a first positioning member 210
  • the light blocking sheet 400 is provided with a first positioning member 210
  • the second positioning member 410, the first positioning member 210 and the second positioning member 410 are used to improve the concentricity of the assembly of the light blocking plate 400 and the lens barrel 200.
  • the first positioning member 210 is a cylinder
  • the second positioning member 410 is a through hole
  • the cylinder 210 is penetrated through the through hole 410.
  • the first positioning member 210 and the second positioning member 410 are both through holes, and the assembly can be achieved by means of an external column.
  • the first positioning member 210 is a cylinder
  • the second positioning member 410 is a through hole
  • the cylinder 210 is penetrated through the through hole 410.
  • the through hole 410 extends through the side surface 402 of the light barrier 400, so that it is convenient to adjust the relative position of the light barrier 400 and the lens barrel 200 from the inner edge to the outer edge of the light barrier 400. It is beneficial to improve the concentricity of the assembly of the light blocking plate 400 and the lens barrel 200.
  • the distance between the side walls of the through hole 410 gradually increases in the direction from the inner edge to the outer edge of the light blocking sheet 400, which is very convenient for assembly.
  • the pillars 210 and the through holes 410 are both multiple (more than or equal to 2) and correspond to each other one to one. In this way, it is more beneficial to improve the concentricity of the assembly of the light blocking plate 400 and the lens barrel 200.
  • the first positioning member 210 is a cylinder
  • the second positioning member 410 is a through hole.
  • the cylinder 210 passes through the through hole 410, and one end of the cylinder 210 extends out of the through hole 410.
  • the part protruding from the through hole 410 is the hot riveting part 212.
  • the hot riveting part 212 is hot riveted and fixed to the object side surface 402 of the light blocking sheet 400 so that the inner edge of the image side surface of the light blocking sheet 400 abuts and fixes the object side surface 3142 of the first mounting portion 314 of the first lens 310.
  • the light blocking plate 400 and the lens barrel 200 can be fixed without glue bonding, and the light blocking plate 400 can be abutted with the object side 3142 of the first mounting portion 314 of the first lens 310 at the same time. Avoiding the glue contaminating the optical part of the lens 300a during the glue dispensing process. Specifically, as shown in FIG. 16 and FIG. 17, after the hot riveting process, the height of the hot riveting portion 212 is reduced, and the outer diameter is increased, thereby covering the through hole 410, thereby achieving the fixation of the light blocking plate 400 and the lens barrel 200.
  • the method for assembling a lens structure includes the following steps:
  • a lens barrel is provided.
  • the lens barrel is a hollow structure with open ends.
  • the lens barrel includes an object side end surface and an image side end surface.
  • Step S720 multiple lenses are arranged in the lens barrel, and the multiple lenses are arranged in sequence from the image side end surface to the object side end surface.
  • a lens located at the end and close to the object side end surface is the first lens, and the first lens includes a connected first lens.
  • the optical part and the first mounting part, the first mounting part is located on the outer periphery of the first optical part.
  • step S730 a light blocking sheet is provided on the object side end surface, and the light blocking sheet extends to the object side surface of the first mounting portion, and the object side surface of the first optical portion is exposed from the object side surface of the light blocking sheet.
  • step S720 includes the following steps:
  • step S722 in the reverse direction, the lenses of the first lens unit are assembled into the first barrel portion.
  • step S722 after the lenses of the first lens unit are sequentially placed in the first barrel portion, glue is dispensed on the mounting portion of the first lens unit near the image side end surface and the inner wall of the first barrel portion, so that the first lens The lenses of the unit are all fixed in the first cylinder part.
  • Step S724 Turn the lens barrel 180°.
  • Step S726 Assemble the lenses of the second lens unit in the second barrel part in the front direction.
  • step S726 the lenses of the second lens unit are sequentially placed in the second barrel portion, wherein, when the first lens is finally placed, the positioning protrusion of the first lens is caught in the positioning groove of the second lens, and The side surface of the first mounting portion of the first lens abuts against the inner wall of the lens barrel to realize the positioning and pre-fixing of the first lens.
  • one end of the cylinder on the object side end extends out of the through hole of the light blocking sheet, and the part of the cylinder extending out of the through hole is a hot riveting part, and the hot riveting part is hot riveted and fixed to the block
  • the light blocking plate abuts and fixes the object side of the first mounting portion, so that the lens of the second lens unit is fixed in the second lens barrel portion.
  • the assembly method of the lens structure will be described in detail below with reference to three specific embodiments.
  • the lens structure in the three embodiments includes four lenses and a spacer.
  • Figures 14-17 illustrate Embodiment 1.
  • the lens 300a of the first lens unit 302, the spacer 300b and the spacer 300c are placed in the first cylindrical portion 200a, wherein, The number of lenses 300a of the first lens unit 302 is three, the number of spacers 300b is three, and the number of spacers 300c is one.
  • glue 600 is dispensed between the mounting portion of the uppermost lens 300b and the inner wall of the first cylindrical portion 200a, so that the lens 300a of the first lens unit 302, the spacer 300b and the spacer 300c are fixed In the first barrel portion 200a.
  • FIG. 16 After turning the structure shown in FIG. 15 by 180°, the structure shown in FIG. 16 is obtained.
  • FIG. 15 glue 600 is dispensed between the mounting portion of the uppermost lens 300b and the inner wall of the first cylindrical portion 200a, so that the lens 300a of the first lens unit 302, the spacer 300b and the spacer 300c are fixed In the first barrel portion 200a.
  • the lens 300a of the second lens unit 304 is placed in the second barrel portion 200b, and the light blocking plate 400 is fixed on the object side end surface of the lens barrel so that the second lens unit 304
  • the lens 300a of is fixed on the second barrel part 200b, wherein the number of the lens 300a of the second lens unit 304 is one piece.
  • Figures 18-21 illustrate Embodiment 2.
  • the lens 300a of the first lens 300a unit, as well as the spacer 300b and the spacer 300c are placed in the first cylinder part 200a, wherein, The number of lenses 300a of the first lens 300a unit is two, the number of spacers 300b is one, and the number of spacers 300c is one.
  • glue is dispensed between the assembly portion of the uppermost lens 300a and the inner wall of the first cylindrical portion 200a, so that the lens 300a of the first lens 300a unit, the spacer 300b and the spacer 300c are fixed to Inside the first cylindrical portion 200a.
  • FIG. 20 After turning the structure shown in FIG. 19 by 180°, the structure shown in FIG. 20 is obtained.
  • FIG. 19 glue is dispensed between the assembly portion of the uppermost lens 300a and the inner wall of the first cylindrical portion 200a, so that the lens 300a of the first lens 300a unit, the spacer 300b and the spacer 300c are fixed to Inside the first cylindrical portion 200
  • the lens 300a of the second lens 300a unit is placed in the second barrel portion 200b, and the light blocking plate is fixed on the object side end surface of the lens barrel to make the second lens 300a unit
  • the lens 300a is fixed on the second cylindrical portion 200b, wherein the number of the lens 300a of the second lens 300a unit is two.
  • FIG. 22-25 illustrate Embodiment 3.
  • the lens 300a of the first lens 300a unit and the spacer 300b are placed in the first cylindrical portion 200a, wherein the first lens 300a
  • the number of the lens 300a of the unit is one piece
  • the number of the spacer 300b is one piece.
  • glue is dispensed between the assembly portion of the uppermost lens 300a and the inner wall of the first cylindrical portion 200a, so that the lens 300a of the first lens 300a unit and the spacer 300b are fixed to the first cylindrical body ⁇ 200a.
  • the lens 300a of the second lens 300a unit and the spacer 300c are placed in the second barrel portion 200b, and the light blocking sheet is fixed on the object side end surface of the lens barrel so that the first The lens 300a of the two lens 300a unit and the spacer 300c are fixed on the second cylindrical portion 200b, wherein the number of the lens 300a of the second lens 300a unit is three, and the number of the spacer 300c is one.
  • the camera module 30 provided by an embodiment of the present invention can be applied to mobile terminals such as smart phones and tablet computers.
  • the camera module 30 generally includes a photosensitive component 30a and a lens component 30b.
  • the photosensitive component 30a includes a circuit board 31, a photosensitive chip 32, a bracket 33, and a filter 34.
  • the photosensitive chip 32 is arranged on the circuit board 31, and the bracket 33 has two ends.
  • the open hollow structure, the bracket 33 is arranged on the circuit board 31, the photosensitive chip 32 is accommodated in the bracket 33, the filter 34 is arranged on the stepped part of the bracket 33, and the lens assembly 30b is arranged on the end of the bracket 33 away from the circuit board 31 .
  • the photosensitive chip 32 is electrically connected to the circuit board 31 through a gold wire 35.
  • the lens assembly 30b includes a voice coil motor 36 and a lens structure 20 arranged in the voice coil motor 36.
  • the voice coil motor 36 can drive the lens structure 20 to move back and forth in the optical axis direction to achieve focusing.
  • the camera module 30 It is an autofocus camera module.
  • a lens holder may be used instead of the voice coil motor 36.
  • the lens structure 20 is fixedly connected to the lens holder.
  • the lens holder and the bracket 33 may be an integral structure, that is, the lens holder can be used to install the lens structure 20, and can also be used to install the filter 34 and package the photosensitive chip 32.

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Abstract

一种镜头结构(20),包括:镜筒(200),为两端开口的中空结构,镜筒(200)包括物侧端面(202)及像侧端面(204);镜片组(300),包括设于镜筒(200)内的多片镜片(300a),多片镜片(300a)自像侧端面(204)至物侧端面(202)依次排列,位于镜片组(300)的端部且靠近物侧端面(202)的一镜片为第一镜片(310),第一镜片(310)包括相连的第一光学部(312)与第一安装部(314),第一安装部(314)位于第一光学部(312)的外周;挡光片(400),分离于镜筒(200),挡光片(400)设于物侧端面(202)上,并延伸至第一安装部(314)的物侧面(3142)上,第一光学部(312)的物侧面(3122)自挡光片(400)的物侧面(402)露出。

Description

镜头结构及其组装方法以及摄像模组
本发明要求申请日为2019年03月27日、申请号为2019102367501的中国专利申请,以及申请日为2019年03月27日、申请号为201920399036X的中国专利申请的优先权。
技术领域
本发明涉及摄像技术领域,特别是涉及一种感光组件、摄像模组及移动终端。
背景技术
随着手机、平板等移动终端朝向全面屏发展,移动终端的屏幕的侧边边框已经消失,上下边框会变得越来越小甚至消失,这对配置于移动终端上的摄像模组的小型化提出了更高的要求。传统的摄像模组的镜头结构通常包括镜筒及设于镜筒内的镜片,利用镜筒前端,遮挡掉设计以外的入射光线,避免设计以外的光线进入镜头结构。在不改变光学性能的前提下(镜片的尺寸、数目等不变的前提下),上述结构的镜头结构的尺寸很难进一步缩小,无法满足移动终端不断提高的高占屏比的需求。
发明内容
根据本申请的各种实施例,提供一种能阻挡形成封闭件的材料流至感光芯片的感光部的感光组件。
一种镜头结构,包括:
镜筒,为两端开口的中空结构,所述镜筒包括物侧端面及像侧端面;
镜片组,包括设于所述镜筒内的多片镜片,所述多片镜片自所述像侧端面至所述物侧端面依次排列,位于所述镜片组的端部且靠近所述物侧端面的一所述镜片为第一镜片,所述第一镜片包括相连的第一光学部与第一安装部, 所述第一安装部位于所述第一光学部的外周;以及
挡光片,分离于所述镜筒,所述挡光片设于所述物侧端面上,并延伸至所述第一安装部的物侧面上,所述第一光学部的物侧面自所述挡光片的物侧面露出。
一种镜头结构的组装方法,包括如下步骤:
提供镜筒,所述镜筒为两端开口的中空结构,所述镜筒包括物侧端面及像侧端面;
在所述镜筒内设置多片镜片,所述多片镜片自所述像侧端面至所述物侧端面依次排列,位于端部且靠近所述物侧端面的一所述镜片为第一镜片,所述第一镜片包括相连的第一光学部与第一安装部,所述第一安装部位于所述第一光学部外周;以及
在所述物侧端面上设置挡光片,且所述挡光片延伸至所述第一安装部的物侧面上,所述第一光学部的物侧面自所述挡光片的物侧面露出。
一种摄像模组,包括上述的镜头结构。
本发明的一个或多个实施例的细节在下面的附图和描述中提出。本发明的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例,可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为本发明一实施例提供的镜头结构的剖面图;
图2为本发明另一实施例提供的镜头结构的剖面图;
图3为图2所示的镜头结构的部分分解图;
图4为本发明另一实施例提供的镜头结构的剖面图;
图5为本发明另一实施例提供的镜头结构的剖面图;
图6为本发明另一实施例提供的镜头结构的剖面图;
图7为本发明另一实施例提供的镜头结构的立体图;
图8为图7所示的镜头结构处于第一状态下组装状态图;
图9为图7所示的镜头结构处于第二状态下组装状态图;
图10为传统的一实施例提供的镜头结构的剖面图;
图11为传统的另一实施例提供的镜头结构的剖面图;
图12为本发明一实施例提供的镜头结构的组装方法的流程图;
图13为图12中的步骤S720的流程图;
图14为实施例1中的镜头结构处于第一状态下组装状态图;
图15为实施例1中的镜头结构处于第二状态下组装状态图;
图16为实施例1中的镜头结构处于第三状态下组装状态图;
图17为实施例1中的完成组装的镜头结构的剖面图;
图18为实施例2中的镜头结构处于第一状态下组装状态图;
图19为实施例2中的镜头结构处于第二状态下组装状态图;
图20为实施例2中的镜头结构处于第三状态下组装状态图;
图21为实施例2中的完成组装的镜头结构的剖面图;
图22为实施例3中的镜头结构处于第一状态下组装状态图;
图23为实施例3中的镜头结构处于第二状态下组装状态图;
图24为实施例3中的镜头结构处于第三状态下组装状态图;
图25为实施例3中的完成组装的镜头结构的剖面图;
图26为本发明一实施例提供的摄像模组的剖面图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施,本领域技术人员可以在不违背本发明内涵的情况下做类似改进, 因此本发明不受下面公开的具体实施的限制。
需要说明的是,当元件被称为“固定于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体地实施例的目的,不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1所示,本发明一实施例提供的镜头结构20包括镜筒200、镜片组300以及挡光片400。
镜筒200为两端开口的中空结构。镜筒200包括相对的物侧端面202及像侧端面204。镜筒200位于物侧端面202上的开口为第一通光孔200a,镜筒200位于像侧端面204上的开口为第二通光孔200b,光线可以经第一通光孔200a进入镜筒200内,进入镜筒200的光线透过镜片组300后,经第二通光孔200b入射至感光芯片32(请参考附图26)上,从而实现成像。
如图2所示,镜片组300包括多片(大于等于两)镜片300a,多片镜片300a自物侧端面202至像侧端面204依次排列。每一镜片300a包括相连的光学部及安装部,安装部位于光学部的外周,通常安装部环绕光学部一周,也即安装部为闭合环形结构,从而便于镜片300a组装于镜筒200内。其中,位于镜片组300的端部且靠近物侧端面202的一镜片300a为第一镜片310,第一镜片310包括相连的第一光学部312与第一安装部314,第一安装部314位于第一光学部312的外周。
挡光片400分离于镜筒200,也即挡光片400与镜筒200分别形成。挡光片400设于物侧端面202上,并延伸至第一安装部314的物侧面3142上,第一光学部312的物侧面3122自挡光片400的物侧面402露出。
如图10所示,在传统的镜头结构10中,一体成型的镜筒12具有带有通 光孔1222的前端板(物侧端板)122,镜筒12通常采用黑色塑料注塑形成,从而使得前端板122不透光,可以遮挡光线,避免设计以外的光线进入镜头结构10(通过通光孔1222进入镜头结构10的光线为设计内的光线)。基于镜筒12一体成型的工艺限制以及镜片组14中的镜片142的结构限制,前端板122的厚度A(在光轴10a方向的尺寸)很难做小。前端板122的物侧面1224与镜片142的物侧面1422齐平,也即镜片142完全收容于镜筒12内。
如图10及图11所示,在图10的基础上,经过各种优化后获得图11所示的镜头结构,其中,前端板122的肉厚(通光孔1222的内壁与外壁之间的厚度)缩小,镜头结构10的头部尺寸(头部宽度)由图10中的B缩小成图11中的B1。如若继续缩小前端板122的肉厚,图11所示虚线圈R处的位置将因厚度太小而无法成型。因此传统的镜头结构10的头部宽度B1通常无法进一步缩小。而镜头结构10的头部宽度无法进一步缩小,导致镜头结构10无法满足移动终端逐渐提高的高占屏比的需求。
如图1及图2所示,在上述镜头结构20中,镜筒200与挡光片400分别形成,挡光片400的厚度(在光轴20a方向的尺寸)不受镜筒200一体成型的工艺限制以及镜片300a结构的限制,可以采用厚度较小的挡光片400来实现遮光,从而可以使得第一光学部312的物侧面3122自挡光片400的物侧面402露出,进而可以使得上述镜头结构20的头部宽度B2由露出的镜片300a的宽度(在水平面上的尺寸)决定。上述镜头结构20的头部宽度B2相对于传统的镜头结构10的头部宽度B1,至少减少了镜筒200的肉厚,因此上述镜头结构20相对于传统的镜头结构10具有小头部宽度的特点。
在一些实施例中,上述镜头结构20的头部宽度B2为1-3mm,也即当挡光片400为环状结构时(此时,挡光片400的中部为一通孔),挡光片400的通孔的直径(内直径)为1-3mm。在一些实施例中,镜筒200的物侧端面202的外直径B3为1.2-5mm。在一些实施例中,挡光片400的厚度为0.01-0.2mm。
如图10及图11所示,在传统的镜头结构10中,镜头结构10的头部深度C或C1为头部与镜筒12外部的最靠近物侧的台阶面之间的间距,传统的 镜头结构的头部深度C或C1大于等于前端板122的厚度A。
在一些实施例中,如图1及图2所示,挡光片400层叠于镜筒200的物侧端面202上。如此,不需要对平面结构的物侧端面202进行开槽等工艺,即可在物侧端面202设置挡光片400。在一些实施例中,挡光片400的外侧壁和与其邻近的镜筒200的外侧壁齐平。如此,可以使得镜头结构20的前端面为平面。可以理解,在其他一些实施例中,挡光片400的外侧壁也可以与物侧端面202配合形成台阶结构。
在一些实施例中,如图4所示,镜筒200的物侧端面202开设有安装槽2022,挡光片400设于安装槽2022内。如此,利于挡光片400定位安装。在一些实施例中,挡光片400的物侧面402与镜筒200的物侧端面202齐平。如此,可以使得镜头结构20的前端面为平面。在一些实施例中,如图5所示,挡光片400的物侧面402位于镜筒200的物侧端面202与第一光学部312的物侧面3122之间。在一些实施例中,如图6所示,挡光片400的物侧面402位于镜筒200的物侧端面202与像侧端面204之间。
其中,在图1、图2、图4及图5所示实施例中,第一光学部312的物侧面3122与挡光片400的物侧面402之间的最大间距为上述镜头结构20的头部深度C2。在图6所示实施例中,第一光学部312的物侧面3122与镜筒200的物侧端面202之间的最大间距为上述镜头结构20的头部深度C2。也即挡光片400的物侧面402和镜筒200的物侧端面202中较高的一者与第一光学部312的物侧面3122之间的最大间距为上述镜头结构20的头部深度C2。在一些实施例中,上述镜头结构20的头部深度为0.1-2mm。因此上述镜头结构20相对于传统的镜头结构10具有小头部深度的特点。如图2及图3所示,在一些实施例中,镜筒200内设置有用于供镜片300a的物侧面承靠的基准台阶面206,基准台阶面206至物侧端面202的方向为反向,基准台阶面206至像侧端面204的方向为正向。基准台阶面206与像侧端面204之间的镜筒200部分为第一筒体部200a,基准台阶面206与物侧端面202之间的镜筒200部分为第二筒体部200b,位于第一筒体部200a内的镜片构成第一镜片单元 302,位于第二筒体部200b内的镜片构成第二镜片单元304。其中,图2及图3中的虚线a即为第一筒体部200a与第二筒体部200b的分界线。
在一些实施例中,第一筒体部200a的内径在正向上逐渐增大,第二筒体部200b的内径在反向上逐渐增大。如此,第一镜片单元302中的镜片300a可以从正向按从小到大的顺序组装于第一筒体部200a内,第二镜片单元304中的镜片300a可以从反向按从小到大的顺序组装于第二筒体部200b内。在一些实施例中,当第一镜片单元302只有一片镜片300a时,或者第一镜片单元302中的镜片300a的尺寸均相同时,第一筒体部200a的内径在正向上也可以保持不变。同理,第二筒体部200b的内径在反向上也可以保持不变。
在一些实施例中,第一筒体部200a的内壁呈阶梯状,此时,第一筒体部200a的内径在正向上间断逐渐增大而非连续逐渐增大。其中,第一筒体部200a内设置有至少一个位于基准台阶面206与像侧端面204之间的第一台阶面201。如图3所示,第一台阶面201的数目为三个。
在一些实施例中,第二筒体部200b的内壁呈阶梯状,此时,第二筒体部200b的内径在反向上间断逐渐增大而非连续逐渐增大。其中,第二筒体部200b内设置有至少一个位于基准台阶面206与物侧端面202之间的第二台阶面203。如图3所示,第二台阶面203的数目为一个。
在一些实施例中,相邻两个镜片300a之间设置有垫片300b。在一些实施例中,镜头结构20还包括至少一个隔圈300c,每一隔圈300c设于相邻两个镜片300a之间,且隔圈300c与邻近的镜片300a之间设置有垫片300b。
在一些实施例中,镜头结构20包括一个隔圈300c,该隔圈300c位于邻近像侧端面204的两个镜片300a之间。如此,在组装位于镜片组300端部且靠近像侧端面204的一镜片300a时,也即在组装第一镜片单元302的最后一片镜片300a时,隔圈300c可以用来承载该最后一片镜片300a和承受组装最后一片镜片300a时的压力。
在一些实施例中,第一台阶面201用于供垫片300b的物侧面直接承靠,以供镜片300a及隔圈300c的物侧面间接承靠。在一些实施例中,最靠近物 侧端面202的第二台阶面203闲置,不用于供镜片300a、垫片300b及隔圈300c直接或间接承靠,且最靠近物侧端面202的第二台阶面203与挡光片400间隔形成空隙500。空隙500可以用来点胶,以增加镜片300a与镜筒200之间的连接牢固性。
在一些实施例中,第一镜片单元302的镜片300a的数目大于等于1,第二镜片单元304的镜片300a的数目大于等于1。在一些实施例中,第一镜片单元302的镜片300a的数目与第二镜片单元304的镜片300a的数目之和小于等于7。如此,利于组装,且利于获得小尺寸的镜头结构20。
如图10及图11所示,在传统的镜头结构10中,前端板122除了具有遮光的效果以外,还具有将镜片142定位、固定于镜筒12内的效果。
下面详解介绍上述镜头结构20的镜片300a如何实现定位、固定于镜筒12内的效果。
如图2所示,在一些实施例中,至少第一镜片310的第一安装部314的像侧面3144位于镜筒200内。在一些实施例中,第一镜片310的第一安装部314的物侧面3142的外侧边缘与镜筒200的物侧端面202齐平。
如图2及图3所示,在一些实施例中,将除第一镜片310以外的其他镜片300a均组装于镜筒200后,再将第一镜片310放置于镜筒200内,第一镜片310在重力的作用下,下压与第一镜片310邻近的镜片320。第一镜片310的侧面3146与镜筒200的内壁抵接。也即第一镜片310可以通过邻近的镜片320来实现定位,并通过与镜筒200的内壁抵接配合来实现定位及固定。
在一些实施例中,第一镜片310的第一安装部314的像侧面3144设置有定位凸起3148,邻近第一镜片310的镜片320的物侧面322设置有定位凹槽324,当第一镜片310组装于镜筒200内时,定位凸起3148卡于定位凹槽324内,从而提高第一镜片310的定位准确度。
在一些实施例中,将除第一镜片310以外的其他镜片300a均组装于镜筒200后,再将第一镜片310放置于镜筒200内,第一镜片310在重力的作用下,下压与第一镜片310邻近的镜片320。在第一镜片310的第一安装部314 的物侧面3142以及镜筒200的内壁点胶,以固定第一镜片310。也即可以通过点胶的方式固定第一镜片310,第一镜片310的第一安装部314的物侧面3142与镜筒200的内壁通过粘结层连接。
在一些实施例中,挡光片400除了具有遮光效果以外,还具有固定第一镜片310与镜筒200的效果。在一些实施例中,挡光片400与第一镜片310的第一安装部314的物侧面3142抵接,从而固定第一镜片310与镜筒200。
在一些实施例中,挡光片400为胶水层。具体地,可以在镜筒200的物侧端面202及第一安装部314的物侧面3142上涂敷挡光胶水,挡光胶水固化形成挡光片400,从而实现第一镜片310与镜筒200牢固固定。其中,挡光胶水可以为黑色胶水。
在一些实施例中,挡光片400为环状结构,挡光片400套设于第一镜片310上。挡光片400的像侧面包括由外向内依次排布且连接的第一环形连接部与第二环形连接部,第一环形连接部与镜筒200的物侧端面202固定连接,第二环形连接部与第一镜片310的第一安装部314的物侧面3142抵接。也即挡光片400的像侧面的内侧边缘与第一镜片310的第一安装部314的物侧面3142抵接,挡光片400的像侧面的外侧边缘与镜筒200的物侧端面202固定连接。
在一些实施例中,挡光片400的像侧面的外侧边缘与镜筒200的物侧端面202之间设置有胶水层。在一些实施例中,挡光片400的像侧面的内侧边缘与第一镜片310的第一安装部314的物侧面3142之间也设置有胶水层。也即,挡光片400通过胶粘的方式分别与镜筒200的物侧端面202及第一安装部314的物侧面3142连接。
如图7、图8及图9所示,在一些实施例中,镜筒200的物侧端面202上设有第一定位件210,挡光片400上设有与第一定位件210配合的第二定位件410,第一定位件210与第二定位件410用于提升挡光片400与镜筒200的组装的同心度。在一些实施例中,第一定位件210为柱体,第二定位件410为通孔,柱体210穿设于通孔410上。在一些实施例中,第一定位件210与 第二定位件410均为通孔,可以借助外置的柱体来实现组装。
在一些实施例中,第一定位件210为柱体,第二定位件410为通孔,柱体210穿设于通孔410上。在一些实施例中,通孔410延伸贯穿挡光片400的侧面402,如此,便于在挡光片400的内侧边缘至外侧边缘的方向上调节挡光片400与镜筒200的相对位置,更利于提升挡光片400与镜筒200的组装的同心度。在一些实施例中,在挡光片400的内侧边缘至外侧边缘的方向上,通孔410的侧壁之间的间距逐渐增大,如此非常方便组装。
在一些实施例中,柱体210与通孔410均为多个(大于等于2个)且一一对应。如此,更利于提升挡光片400与镜筒200的组装的同心度。在一些实施例中,柱体210为三个,三个柱体210等间距排布。
在一些实施例中,第一定位件210为柱体,第二定位件410为通孔,柱体210穿设于通孔410上,且柱体210的一端伸出通孔410,柱体210伸出通孔410的部分为热铆部212。热铆部212热铆固定于挡光片400的物侧面402上,从而使得挡光片400的像侧面的内侧边缘与第一镜片310的第一安装部314的物侧面3142抵接固定。此时,不需要胶水粘结,即可实现挡光片400与镜筒200的固定,同时实现挡光片400与第一镜片310的第一安装部314的物侧面3142抵接,从而可以有效避免点胶过程中,出现胶水污染镜片300a的光学部的情况出现。具体地,如图16及图17所示,热铆部212经热铆工艺后,高度变小,外径增加,从而覆盖通孔410,进而实现挡光片400与镜筒200的固定。
如图12所示,本发明一实施例提供的镜头结构的组装方法,包括如下步骤:
步骤S710,提供镜筒,镜筒为两端开口的中空结构,镜筒包括物侧端面及像侧端面。
步骤S720,在镜筒内设置多片镜片,多片镜片自像侧端面至物侧端面依次排列,位于端部且靠近物侧端面的一镜片为第一镜片,第一镜片包括相连的第一光学部与第一安装部,第一安装部位于第一光学部外周。
步骤S730,在物侧端面上设置挡光片,且挡光片延伸至第一安装部的物侧面上,第一光学部的物侧面自挡光片的物侧面露出。
如图13所示,在一些实施例中,步骤S720包括如下步骤:
步骤S722,在反向上,将第一镜片单元的镜片组装于第一筒体部内。
在步骤S722中,将第一镜片单元的镜片依次放置于第一筒体部内后,在第一镜片单元靠近像侧端面的安装部与第一筒体部的内壁点胶,以使得第一镜片单元的镜片均固定于第一筒体部内。
步骤S724,将镜筒翻转180°。
步骤S726,在正向上,将第二镜片单元的镜片组装于第二筒体部内。
在步骤S726中,将第二镜片单元的镜片依次放置于第二筒体部内,其中,最后在放置第一镜片时,第一镜片的定位凸起卡于第二镜片的定位凹槽内,且第一镜片的第一安装部的侧面与镜筒的内壁抵接,实现第一镜片的定位及预固定。
在一些实施例中,在步骤S730中,物侧端面上的柱体的一端伸出挡光片的通孔,柱体伸出通孔的部分为热铆部,热铆部热铆固定于挡光片的物侧面上,以使得挡光片与第一安装部的物侧面抵接固定,从而使得第二镜片单元的镜片固定于第二镜筒部内。
下面结合三个具体的实施例详细介绍镜头结构的组装方法,其中,三个实施例中的镜头结构均包括四片镜片以及一个隔圈。
图14-图17示意了实施例1,在图14中,在反向上,在第一筒体部200a内放入第一镜片单元302的镜片300a,以及垫片300b及隔圈300c,其中,第一镜片单元302的镜片300a数目为三片,垫片300b的数目为三片,隔圈300c的数目为一片。在图15中,在最上方的一片镜片300b的安装部与第一筒体部200a的内壁之间点胶600,以使得第一镜片单元302的镜片300a,以及垫片300b及隔圈300c固定于第一筒体部200a内。将图15所示的结构翻转180°后,得到图16所示的结构。在图17中,在正向上,在第二筒体部 200b内放入第二镜片单元304的镜片300a,并在镜筒的物侧端面上固定挡光片400,以使得第二镜片单元304的镜片300a固定于第二筒体部200b上,其中,第二镜片单元304的镜片300a的数目为一片。
图18-图21示意了实施例2,在图18中,在反向上,在第一筒体部200a内放入第一镜片300a单元的镜片300a,以及垫片300b及隔圈300c,其中,第一镜片300a单元的镜片300a的数目为两片,垫片300b的数目为一片,隔圈300c的数目为一片。在图19中,在最上方的一片镜片300a的组装部与第一筒体部200a的内壁之间点胶,以使得第一镜片300a单元的镜片300a,以及垫片300b及隔圈300c固定于第一筒体部200a内。将图19所示的结构翻转180°后,得到图20所示的结构。在图21中,在正向上,在第二筒体部200b内放入第二镜片300a单元的镜片300a,并在镜筒的物侧端面上固定挡光片,以使得第二镜片300a单元的镜片300a固定于第二筒体部200b上,其中,第二镜片300a单元的镜片300a的数目为两片。
图22-图25示意了实施例3,在图22中,在反向上,在第一筒体部200a内放入第一镜片300a单元的镜片300a,以及垫片300b,其中,第一镜片300a单元的镜片300a的数目为一片,垫片300b的数目为一片。在图23中,在最上方的一片镜片300a的组装部与第一筒体部200a的内壁之间点胶,以使得第一镜片300a单元的镜片300a,以及垫片300b固定于第一筒体部200a内。将图20所示的结构翻转180°后,得到图24所示的结构。在图25中,在正向上,在第二筒体部200b内放入第二镜片300a单元的镜片300a,以及隔圈300c,并在镜筒的物侧端面上固定挡光片,以使得第二镜片300a单元的镜片300a,以及隔圈300c固定于第二筒体部200b上,其中,第二镜片300a单元的镜片300a的数目为三片,隔圈300c的数目为一片。
如图26所示,本发明一实施例提供的摄像模组30,该摄像模组30可以应用于智能手机、平板电脑等移动终端中。
摄像模组30包括通常包括感光组件30a及镜头组件30b,感光组件30a包括电路板31、感光芯片32、支架33以及滤光片34,感光芯片32设于电 路板31上,支架33为两端开口的中空结构,支架33设于电路板31上,感光芯片32收容于支架33内,滤光片34设于支架33的阶梯部上,镜头组件30b设于支架33远离电路板31的一端上。
其中,感光芯片32通过金线35与电路板31电连接。镜头组件30b包括音圈马达36及设于音圈马达36内的镜头结构20,音圈马达36可以驱动镜头结构20在光轴方向上往返移动,以实现调焦,此时,摄像模组30为自动对焦摄像模组。在一些实施例中,当摄像模组30为定焦摄像模组时,可以采用镜座替代音圈马达36,此时,镜头结构20与镜座固定连接。在一些实施例中,镜座与支架33可以为一体成型的结构,也即镜座既能用于安装镜头结构20,又能用于安装滤光片34及封装感光芯片32。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。

Claims (21)

  1. 一种镜头结构,包括:
    镜筒,为两端开口的中空结构,所述镜筒包括物侧端面及像侧端面;
    镜片组,包括设于所述镜筒内的多片镜片,所述多片镜片自所述像侧端面至所述物侧端面依次排列,位于所述镜片组的端部且靠近所述物侧端面的一所述镜片为第一镜片,所述第一镜片包括相连的第一光学部与第一安装部,所述第一安装部位于所述第一光学部的外周;以及
    挡光片,分离于所述镜筒,所述挡光片设于所述物侧端面上,并延伸至所述第一安装部的物侧面上,所述第一光学部的物侧面自所述挡光片的物侧面露出。
  2. 根据权利要求1所述的镜头结构,其特征在于,所述挡光片层叠于所述镜筒的所述物侧端面上;
    或者,所述镜筒的所述物侧端面开设有安装槽,所述挡光片设于所述安装槽内。
  3. 根据权利要求1所述的镜头结构,其特征在于,所述挡光片的厚度为0.01-0.2mm。
  4. 根据权利要求1所述的镜头结构,其特征在于,所述挡光片为环状结构,所述挡光片的内直径为1-3mm。
  5. 根据权利要求1所述的镜头结构,其特征在于,所述镜筒的所述物侧端面的外直径为1.2-5mm。
  6. 根据权利要求1所述的镜头结构,其特征在于,所述挡光片的物侧面和所述镜筒的所述物侧端面中较高的一者与所述第一光学部的物侧面之间的最大间距为0.1-2mm。
  7. 根据权利要求1所述的镜头结构,其特征在于,所述挡光片与所述第一镜片的所述第一安装部的物侧面抵接,以将所述第一镜片固定于所述镜筒。
  8. 根据权利要求7所述的镜头结构,其特征在于,所述挡光片为环状结构;
    所述挡光片为直接覆盖于所述镜筒的物侧端面和所述第一安装部的物侧面的固化的胶水层;或者,所述挡光片套设于所述第一镜片上,所述挡光片的像侧面包括由外向内依次排布且连接的第一环形连接部与第二环形连接部,所述第一环形连接部与所述镜筒的物侧端面固定连接,所述第二环形连接部与所述第一镜片的所述第一安装部的物侧面抵接。
  9. 根据权利要求8所述的镜头结构,其特征在于,所述镜筒的所述物侧端面上设有第一定位件,所述挡光片上设有第二定位件,所述第二定位件与所述第一定位件配合,限制所述挡光片与所述镜筒的相对位置。
  10. 根据权利要求9所述的镜头结构,其特征在于,所述第一定位件为柱体,所述第二定位件为通孔。
  11. 根据权利要求10所述的镜头结构,其特征在于,当所述挡光片套设于所述第一镜片上时,所述柱体穿设于所述通孔上,且所述柱体的一端伸出所述通孔,所述柱体伸出所述通孔的部分为热铆部,所述热铆部热铆固定于所述挡光片的物侧面上,并使得所述挡光片的像侧面的所述第二环形连接部与所述第一镜片的所述第一安装部的物侧面抵接固定。
  12. 根据权利要求1所述的镜头结构,其特征在于,所述镜筒内设置有用于供所述镜片的物侧面承靠的基准台阶面,所述基准台阶面至所述物侧端面的方向为反向,所述基准台阶面至所述像侧端面的方向为正向,所述基准台阶面与所述像侧端面之间的镜筒部分为第一筒体部,所述基准台阶面与所 述物侧端面之间的镜筒部分为第二筒体部,位于所述第一筒体部内的镜片构成第一镜片单元,位于所述第二筒体部内的镜片构成第二镜片单元;
    其中,所述第一筒体部的内径在所述正向上逐渐增大或保持不变,所述第二筒体部的内径在所述反向上逐渐增大或保持不变。
  13. 根据权利要求12所述的镜头结构,其特征在于,所述第一筒体部的内壁呈阶梯状,所述第一筒体部内设置有至少一个位于所述基准台阶面与所述像侧端面之间的第一台阶面,所述第一台阶面用于供所述镜片承靠。
  14. 根据权利要求12所述的镜头结构,其特征在于,所述第二筒体部的内壁呈阶梯状,所述第二筒体部内设置有至少一个位于所述基准台阶面与所述物侧端面之间的第二台阶面,最靠近所述物侧端面的所述第二台阶面与所述挡光片间隔形成空隙。
  15. 根据权利要求1-14中任意一项所述的镜头结构,其特征在于,所述第一镜片的所述第一安装部的侧面与所述镜筒的内壁抵接。
  16. 根据权利要求1-14所述的镜头结构,其特征在于,所述第一镜片的所述第一安装部的像侧面设置有定位凸起,邻近所述第一镜片的物侧面设置有定位凹槽,所述定位凸起卡于所述定位凹槽内。
  17. 根据权利要求1-14所述的镜头结构,其特征在于,所述第一镜片的所述第一安装部的物侧面的外侧边缘与所述镜筒的所述物侧端面齐平。
  18. 一种镜头结构的组装方法,包括如下步骤:
    提供镜筒,所述镜筒为两端开口的中空结构,所述镜筒包括物侧端面及像侧端面;
    在所述镜筒内设置多片镜片,所述多片镜片自所述像侧端面至所述物侧端面依次排列,位于端部且靠近所述物侧端面的一所述镜片为第一镜片,所 述第一镜片包括相连的第一光学部与第一安装部,所述第一安装部位于所述第一光学部外周;以及
    在所述物侧端面上设置挡光片,且所述挡光片延伸至所述第一安装部的物侧面上,所述第一光学部的物侧面自所述挡光片的物侧面露出。
  19. 根据权利要求18所述的镜头结构的组装方法,其特征在于,所述镜筒内设置有用于供所述镜片的物侧面承靠的基准台阶面,所述基准台阶面至所述物侧端面的方向为反向,所述基准台阶面至所述像侧端面的方向为正向,所述基准台阶面与所述像侧端面之间的镜筒部分为第一筒体部,所述基准台阶面与所述物侧端面之间的镜筒部分为第二筒体部,位于所述第一筒体部内的镜片构成第一镜片单元,位于所述第二筒体部内的镜片构成第二镜片单元,其中,所述第一筒体部的内径在所述正向上逐渐增大或保持不变,所述第二筒体部的内径在所述反向上逐渐增大或保持不变。
  20. 根据权利要求18所述的镜头结构的组装方法,其特征在于,所述将所述多片镜片组装于所述镜筒内的步骤包括如下步骤:
    在所述反向上,将所述第一镜片单元的镜片组装于所述第一筒体部内;
    将所述镜筒翻转180°;以及
    在所述正向上,将所述第二镜片单元的镜片组装于所述第二筒体部内。
  21. 一种摄像模组,包括如权利要求1-17中任意一项所述的镜头结构。
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