TWI420178B - Lens module, camera mudule having the lens module and method for assembling the camera module - Google Patents

Description

Lens module, camera module having the same, and assembly method thereof

The present invention relates to the field of optical systems, and in particular, to a lens module, a camera module having the same, and a method of assembling the same.

With the rapid development of multimedia technology, digital cameras, camcorders and mobile phones with cameras are increasingly favored by consumers. While people are demanding higher image quality for digital cameras, camcorders and mobile phone cameras, Demand for products such as digital cameras, camcorders and mobile phones with cameras is also increasing. In a camera such as a digital camera, a video camera, and a mobile phone camera, the lens is an indispensable component.

The composition of the mobile phone digital camera module is mainly a combination of an optical lens module and a photosensitive module for the purpose of image recording. At present, the lens barrel used in the lens of the mobile digital camera is mostly formed by plastic injection molding, and the screw is matched with the holder to fix the lens in the lens holder. To fix the lens barrel and the lens holder in this way, the problem of the torsion caused by the cooperation of the screw between the lens barrel and the lens holder must be considered. Because the thread of the lens barrel and the mirror base are processed separately, the size and characteristics of the screw are quite sensitive to the influence of the torque between the two parts. If the fitting is too loose, the lens will not be easily adjusted and fixed, and if it is too tight, it is not easy. Rotating the lens may cause damage to the plastic parts. And the thread The characteristics and dimensions are not easy to measure, so the mold repair needs to be slowly refined, in order to achieve the required torque, and the parts are not easy to be qualified in mass production.

In addition to the above shortcomings, in the lens focusing process, the metal focusing fixture is usually used, and the focusing ring on the lens barrel is used to rotate the lens to the focus position, but the process is often used for adjusting the fixture and the plastic lens barrel. Improper contact often causes damage to the appearance of the lens barrel. In production, it is easy to cause poor appearance and disable the module, which is also a factor in the decline of product yield. Moreover, due to the demand for miniaturization of the product, the pitch of the lens barrel is usually only about 0.35 mm. In the lens focusing process, it is usually necessary to move the lens by several millimeters, so that the focusing process time cannot be shortened, and the production efficiency cannot be effectively improved.

In view of this, it is necessary to provide a lens module which is simple in structure, convenient in assembly, and easy to adjust focus, and a camera module having the lens module and an assembly method thereof.

A lens module includes: a lens barrel having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens barrel having a side wall surface a lens holder having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens holder being hollow and internally forming a receiving cavity for Part or all of the main body portion of the lens barrel, the main body portion of the lens holder has an inner wall surface; and at least one lens, the at least one lens is received in the main body portion of the lens barrel, and the main body of the lens barrel The side wall surface and the inner wall surface of the main body portion of the lens holder are both smooth surfaces, the outer diameter of the main body portion of the lens barrel is equivalent to the inner diameter of the main body portion of the lens holder, and the side wall surface of the lens barrel is just opposite to the lens holder The inner wall surface is in close contact with each other, and the second end of the lens barrel is provided with at least one clamping portion for clamping the lens barrel to facilitate adjusting the position of the lens barrel in the lens holder, the first of the lens holder End set At least one glue portion is used for setting the position of the lens barrel, and then glue is glued into the glue portion to fix the lens barrel in the lens holder.

A camera module includes: a lens barrel having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens barrel having a side wall surface a lens holder having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens holder being hollow and internally forming a receiving cavity for Part or all of the main body portion of the lens barrel, the main body portion of the lens holder has an inner wall surface; at least one lens, the at least one lens is received in the main body portion of the lens barrel; and an image sensing component The image sensing component is disposed on the other side of the lens holder opposite to the lens barrel, and the surface of the main body side wall of the lens barrel and the inner wall surface of the main body portion of the lens holder are smooth surfaces, and the outer diameter of the main body portion of the lens barrel is The inner diameter of the main body of the lens holder is equivalent, and the side wall surface of the lens barrel is just in close contact with the inner wall surface of the lens holder, and the second end of the lens barrel is provided with at least one clamping portion for Holding the lens barrel to facilitate adjusting the position of the lens barrel in the lens holder, the End portion is provided with adhesive at least one point, for the position of the lens barrel set point after the glue into the dispensing section so that the lens barrel is fixed to the seat.

A method for assembling a camera module, comprising the steps of: providing a camera module as described above; aligning a first end of the lens barrel with a first end of the lens holder, and the main body of the lens barrel Inserting into the main body of the lens holder; clamping the clamping portion of the second end of the lens barrel with a clamping tool, adjusting the relative position of the lens barrel and the lens holder, and forming at least one lens in the lens barrel The imaging surface of the optical system falls on the image sensing component; the glue is spotted to the dispensing portion of the first end of the lens holder to fix the lens barrel and the lens holder.

Compared with the prior art, since the lens barrel and the lens holder of the lens module are provided with no screw In the manufacturing method, the manufacturing process can be simplified, and the problem that the yield of the lens barrel and the mirror base is not matched can be avoided, and the time required for rotating the lens can be saved and the focusing process time can be shortened in the assembly process. Moreover, the problem of torque caused by the cooperation of the screw teeth is eliminated, and the assembly of the lens barrel and the lens holder is more convenient and quick, the productivity and the yield can be improved, and mass production can be achieved.

100‧‧‧ camera module

10‧‧‧Mirror tube

11, 21‧‧ ‧ main body

12, 22‧‧‧ first end

13,23‧‧‧second end

14‧‧‧ sidewall surface

15,24‧‧‧容容

16,26‧‧‧ lead angle

17‧‧‧Clamping Department

20‧‧‧Mirror base

25‧‧‧ inner wall surface

27‧‧‧ Dispensing Department

30‧‧‧ lenses

40‧‧‧Image sensing components

41‧‧‧ bearing seat

50‧‧‧Lens module

200‧‧‧Clamping tools

FIG. 1 is an exploded perspective view of a camera module according to an embodiment of the present invention.

2 is a perspective view of another perspective view of the lens barrel of the camera module of FIG. 1.

3 is a perspective view of the lens holder of the camera module of FIG. 1.

4 is a perspective view of the assembled camera module of FIG. 1.

FIG. 5 is a perspective view of the camera module of FIG. 1 during assembly.

6 is a perspective view showing another state in the assembly process of the camera module of FIG. 1.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 to FIG. 4 , which are a camera module 100 according to an embodiment of the present invention. The camera module 100 includes a lens barrel 10, a lens holder 20, a plurality of lenses 30, and an image sensing element 40. The lens barrel 10, the lens holder 20 and the plurality of lenses 30 constitute a lens module 50.

The lens barrel 10 includes a main body portion 11 . The lens barrel 10 further includes a first end portion 12 and a second end portion 13 opposite to the first end portion 12 . The first end portion 12 is located at one end of the main body portion 11 and the second end portion 13 is located at the other end of the main body portion 11. The main body of the lens barrel 10 The portion 11 is cylindrical, and the cylindrical body portion 11 has a side wall surface 14. The main body portion 11 is hollow and internally forms an accommodating cavity 15. The outer diameter of the second end portion 13 of the lens barrel 10 is larger than the outer diameter of the main body portion 11. The outer diameter of the first end portion 12 is equivalent to the outer diameter of the main body portion 11. The second end portion 13 is annular and has a diaphragm hole in the middle.

The lens holder 20 has a main body portion 21, and the lens holder 20 further includes a first end portion 22 and a second end portion 23 opposite to the first end portion 22. The first end portion 22 is located at one end of the main body portion 21, and the second end portion 23 is located at the other end of the main body portion 21. The main body portion 21 of the lens holder 20 is also cylindrical. The cylindrical main body portion 21 is hollow and internally defines a receiving cavity 24 for partially or completely accommodating the main body portion 11 of the lens barrel 10. The body portion 21 of the seat 20 has an inner wall surface 25. The second end portion 23 of the lens holder 20 has a square shape, and the first end portion 22 of the lens holder 20 has a cylindrical shape and is equivalent to the outer diameter of the main body portion 21 of the lens holder 20.

The lens 30 is received in the accommodating cavity 15 of the lens barrel 10. The number of the lenses 30 is one or plural. In the present embodiment, the number of the lenses 30 is two.

The image sensing element 40 is disposed on the other side of the lens holder 20 relative to the lens barrel 10. The image sensing component 40 can be disposed in the lens holder 20 , that is, disposed at the second end portion 23 of the lens holder 20 . Of course, it can also be disposed outside the lens holder 20 and then fixed to the lens holder 20 by other structures. In this embodiment, the image sensor 40 is disposed on a carrier 41 having a shape matching the shape of the second end portion 23 of the lens holder 20, and the carrier 41 and the lens holder 20 are The two end portions 23 are fixed by a snap fit.

The side wall surface 14 of the main body portion 11 of the lens barrel 10 and the inner wall surface 25 of the main body portion 21 of the lens holder 20 are smooth surfaces. The outer diameter of the main body portion 11 of the lens barrel 10 and the main body of the lens holder 20 The inner diameter of the portion 21 is such that the main body portion 11 of the lens barrel 10 can be placed in the accommodating cavity 24 of the main body portion 21 of the lens holder 20, and the side wall surface 14 of the lens barrel 10 is just inside the lens holder 20. The wall surface 25 is in close contact with each other.

The first end portion 22 of the lens holder 20 and the first end portion 12 of the lens barrel 10 each have a lead angle structure for facilitating the insertion of the main body portion 11 of the lens barrel 10 into the main body portion 21 of the lens holder 20. The first end portion 12 of the lens barrel 10 has a lead angle 16 and the first end portion 22 of the lens holder 20 has a lead angle 26 which is disposed opposite the lead angle 26 and which is shaped to fit.

The second end portion 13 of the lens barrel 10 is provided with at least one clamping portion 17 for clamping the lens barrel 10 for facilitating adjustment of the position of the lens barrel 10 in the lens holder 20. The clamping portion 17 can be provided as an annular groove as shown in this embodiment. Of course, it can also be set to other shapes, such as a semi-annular groove or an arcuate groove.

The first end portion 22 of the lens holder 20 is symmetrically disposed with two dispensing portions 27 for inserting glue into the dispensing portion 27 to fix the lens barrel 10 to the lens holder 20 after the lens barrel 10 is disposed. in. The shape of the dispensing portion 27 may be a square, an arc, or a triangle. In this embodiment, the dispensing portion 27 is two square grooves.

As shown in FIG. 5 and FIG. 6 , the present invention further provides a method for assembling a camera module, comprising the steps of: providing a camera module 100 as described above; and having the first end 12 of the lens barrel 10 The first end portion 22 of the lens holder 20 is aligned, and the main body portion 11 of the lens barrel 10 is placed in the main body portion 21 of the lens holder 20; the clamp of the second end portion 13 of the lens barrel 10 is clamped by a holding tool 200. Holding part 17, adjusting The relative position of the lens barrel 10 and the lens holder 20, and the imaging surface of the optical system formed by the at least one lens 30 in the lens barrel 10 falls on the image sensing element 40; the glue is first to the lens holder 20 The dispensing portion 27 of the end portion 22 secures the lens barrel 10 to the lens holder 20.

Specifically, the gripping tool 200 includes two jaws that can be opened and closed. When the clip is opened, the clamping portion 17 of the lens barrel 10 is aligned, and the two clamping jaws are closed, thereby clamping the lens barrel 10, thereby facilitating the movement of the lens barrel 10 for focusing operation. When the focal length is aligned, the lens barrel can be dispensed.

Compared with the prior art, since the lens barrel and the lens holder of the lens module adopt a screw-free matching manner, the manufacturing process can be simplified, and the yield of the lens barrel and the lens holder is prevented from being uncoordinated. The problem is that in the assembly process, the time required for rotating the lens can be saved, the focusing process time can be shortened, and the torque problem caused by the screwing of the screw can be avoided, and the assembly of the lens barrel and the lens holder can be more convenient and quick, and the production can be improved. Rate and yield, and can be mass produced.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims.

100‧‧‧ camera module

10‧‧‧Mirror tube

11, 21‧‧ ‧ main body

12, 22‧‧‧ first end

13,23‧‧‧second end

14‧‧‧ sidewall surface

24‧‧‧容容

20‧‧‧Mirror base

25‧‧‧ inner wall surface

27‧‧‧ Dispensing Department

30‧‧‧ lenses

40‧‧‧Image sensing components

41‧‧‧ bearing seat

50‧‧‧Lens module

Claims (10)

A lens module includes: a lens barrel having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens barrel having a side wall surface a lens holder having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens holder being hollow and internally forming a receiving cavity for Part or all of the main body portion of the lens barrel, the main body portion of the lens holder has an inner wall surface; and at least one lens, the at least one lens is received in the main body portion of the lens barrel; The side wall surface of the main body portion of the cylinder and the inner wall surface of the main body portion of the lens holder are both smooth surfaces, and the outer diameter of the main body portion of the lens barrel is equivalent to the inner diameter of the main body portion of the lens holder, and the side wall surface of the lens barrel is just right In contact with the inner wall surface of the lens holder, the second end of the lens barrel is provided with at least one clamping portion for clamping the lens barrel to facilitate adjusting the position of the lens barrel in the lens holder, the mirror The first end of the seat is provided with at least a little glue portion, and the glue is used after the lens barrel position is set. Enter the dispensing unit so that the lens barrel is fixed to the seat. The lens module of claim 1, wherein the first end of the lens holder and the first end of the lens barrel have a lead angle structure for facilitating placement of the lens barrel body portion In the main body of the lens holder. The lens module of claim 1, wherein the first end of the lens barrel is equivalent to the outer diameter of the main body portion of the lens holder, and the outer diameter of the second end portion of the lens barrel is larger than The outer diameter of the main body of the lens barrel. The lens module of claim 1, wherein the first end of the lens holder is circular and corresponds to an outer diameter of the main body of the lens holder, and the second end of the lens holder is square. . A camera module includes: a lens barrel having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens barrel having a side wall surface a lens holder having a main body portion and a first end portion and a second end portion respectively located at two ends of the main body portion, the main body portion of the lens holder being hollow and internally forming a receiving cavity for Part or all of the main body portion of the lens barrel, the main body portion of the lens holder has an inner wall surface; at least one lens, the at least one lens is received in the main body portion of the lens barrel; and an image sensing component The image sensing component is disposed on the other side of the lens holder relative to the lens barrel; the improvement is that the sidewall surface of the main body portion of the lens barrel and the inner wall surface of the main body portion of the lens holder are smooth surfaces, and the main body portion of the lens barrel The outer diameter is equivalent to the inner diameter of the main body of the lens holder, and the side wall surface of the lens barrel is just in close contact with the inner wall surface of the lens holder, and the second end of the lens barrel is provided with at least one clamping Part for holding the lens barrel to facilitate adjusting the position of the lens barrel in the lens holder A first end portion of the lens holder has at least one point of the plastic portion, a barrel set the position of the point after the glue dispensing unit such that the lens barrel is fixed to the seat. The camera module of claim 5, wherein the first end of the lens holder and the first end of the lens barrel have a lead angle structure for facilitating placement of the lens barrel body portion In the main body of the lens holder. The camera module of claim 5, wherein the first end of the lens barrel is equivalent to the outer diameter of the main body portion of the lens holder, and the outer diameter of the second end portion of the lens barrel is larger than the mirror The outer diameter of the main body of the barrel. The camera module of claim 5, wherein the first end of the lens holder is circular and corresponds to an outer diameter of the main body of the lens holder, and the second end of the lens holder is square. . A method for assembling a camera module, comprising the steps of: providing a camera module according to any one of claims 5 to 8; aligning the first end of the lens barrel with the first one of the lens holder An end portion, and the main body portion of the lens barrel is placed in the main body portion of the lens holder; the clamping portion of the second end portion of the lens barrel is clamped by a clamping tool, and the relative position of the lens barrel and the lens holder is adjusted, and the mirror is adjusted The imaging surface of the optical system formed by the at least one lens in the cylinder falls on the image sensing component; the glue is spotted to the dispensing portion of the first end of the lens holder to fix the lens barrel and the lens holder. The method of assembling a camera module according to claim 9, wherein the clamping tool is two jaws that can be opened and closed.