TWI420174B - Barrel assembly body and method for making the same - Google Patents

Description

Lens barrel assembly and method of manufacturing same

The present invention relates to the assembly of a lens barrel, and more particularly to a lens barrel assembly and a method of fabricating the same.

With the development of optical imaging technology, lens modules are used in various imaging devices such as digital cameras (see Capturing images with digital still cameras, Micro, IEEE Volume: 18, issue: 6, Nov.-Dec. 1998 Page(s): 14 -19), the camera is widely used, and the electronic devices such as mobile phones and notebooks integrated with the lens module are favored by many consumers. A lens module with a shooting function generally consists of the most important lenses and other optical components. For high-quality lenses, in order to ensure the image quality, the position between the optical components should be fixed, so it should be assembled by a good assembly method, and then the optical components are encapsulated in the lens barrel by the sealing technology to ensure The relatively stable positional relationship between the components does not fall off, thus ensuring good imaging quality of the lens module.

Referring to FIG. 1 , a lens module 10 of the prior art includes a lens barrel 11 , a plurality of lenses 12 , a spacer ring 13 , and a filter 14 . The lens 12, the spacer ring 13, and the filter 14 are housed in the lens barrel 11. Before the filter 14 is assembled into the lens barrel 11, the glue is applied to the spacer ring 13 and the inner wall of the lens barrel 11 by a dispenser to assemble the filter 14, and then The ultraviolet light is irradiated, and the filter 14 is adhered to the lens barrel 11 and the spacer ring 13, and the lens 12, the spacer ring 13, and the filter 14 are all enclosed in the lens barrel 11.

The filter 14 of the lens module 10 is adhered to the spacer ring 13 and the lens barrel 11 by gluing. This method is often caused by deterioration of the adhesive, uneven coating of the adhesive, and ultraviolet light due to the filter 13 The effect of light makes the adhesive UV adhesive incompletely cured, or because the contact area of the filter 14 with the spacer ring 13 and the lens barrel 11 is small, and at the same time it is a different material, resulting in poor adhesion and causing the filter 14 to be separated from the filter. The ring 13 and the lens barrel 11 are detached, thereby disabling the lens module 10. In addition, the manner of gluing may cause the production yield of the lens module 10 to be low.

In view of the above, it is necessary to provide a lens barrel assembly having higher strength and a method of manufacturing the lens barrel assembly.

A lens barrel assembly comprising a barrel structure and an annular sealing piece, the barrel structure comprising a lens barrel and an optical component incorporated in the lens barrel, the annular sealing piece being encapsulated at the end of the barrel opening The optical element is pressed into the lens barrel, and the annular sealing piece is sealed at the end of the opening of the barrel by friction welding.

A manufacturing method of a lens barrel assembly, comprising the steps of: providing a lens barrel structure in which an optical element is incorporated into a lens barrel, and an annular sealing piece; and relatively rotating the lens barrel structure and the annular sealing piece The end of the barrel of the barrel structure to be sealed is rubbed with the annular sealing piece; the heat generated by the end of the barrel to be sealed on the side of the barrel structure and the annular sealing piece is caused by friction When the end of the lens barrel and the annular sealing piece reach the glass transition temperature, the rotation is stopped; the annular sealing piece or the barrel structure is moved, and the annular sealing piece and the barrel structure side to be sealed are crimped. The end of the lens barrel is such that the annular sealing piece portion is in contact with the end of the lens barrel, and the optical element is pressed against Inside the lens barrel.

In contrast to the prior art, the annular sealing piece of the lens barrel assembly is enclosed at the end of the barrel opening to press the optical element into the barrel. Therefore, the optical component is not easily detached from the lens barrel, and the lens barrel structure is relatively tightly sealed, and the lens module is not easily damaged and has a long service life.

In the manufacturing method of the lens barrel assembly, the annular sealing piece is partially welded to the end of the lens barrel on the side to be sealed of the lens barrel structure by friction crimping, and the optical element is pressed into the lens barrel. Due to the high strength of the fusion joint, the optical components of the lens barrel assembly are not easily detached from the lens barrel, and the lens barrel structure is relatively tightly sealed. The lens module is not easily damaged and has a long service life.

20‧‧‧Seal film

21‧‧‧through hole

30‧‧‧Mirror structure

31‧‧‧Mirror tube

32‧‧‧ lenses

33‧‧‧ spacer ring

34‧‧‧Filter

35‧‧‧ external thread

36‧‧‧End of the lens barrel

40‧‧‧Lens cylinder assembly

Figure 1 is a schematic view showing the structure of a prior art lens barrel assembly.

2 is a flow chart showing a method of fabricating a lens barrel assembly according to an embodiment of the present invention.

3 is a schematic perspective view showing the structure of an annular sealing piece according to an embodiment of the present invention.

4 to 6 are schematic views showing respective steps of a method of manufacturing a lens barrel assembly according to an embodiment of the present invention.

Fig. 7 is a cross-sectional structural view showing the lens barrel assembly of the embodiment of the present invention.

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

Please refer to FIG. 7 , which is a cross-sectional structural view of a lens barrel assembly 40 according to an embodiment of the present invention. The lens barrel assembly 40 includes a barrel structure 30 and an annular sealing sheet 20, the barrel structure 30 including a lens barrel 31 and optical elements incorporated in the lens barrel 31, the optical element A plurality of lenses 32, spacer rings 33 placed between the respective lenses 32 for supporting action, and a filter 34 are included. The outer wall of the lens barrel 31 has an external thread 35 for cooperating with the internal thread on the inner wall of the lens holder. The annular sealing piece 20 is encapsulated in the end portion 36 of the lens barrel, and has an inner diameter smaller than the inner diameter of the lens barrel 31, and an outer diameter larger than the inner diameter of the lens barrel 31, and closely adheres to the filter 34, thereby Optical elements such as the lens 32, the spacer ring 33, and the filter 34 are pressed into the lens barrel 31.

Referring to FIG. 2, FIG. 3 and FIG. 4 together, a lens barrel structure 30 to be sealed and an annular sealing sheet 20 as shown in FIG. 4 are first provided. The barrel structure 30 includes an optical element such as a lens barrel 31, a lens 32 incorporated in the lens barrel 31, a spacer ring 33, and a filter 34. The outer wall of the lens barrel 31 has an external thread 35 for cooperating with the internal thread on the inner wall of the lens holder. A through hole 21 is defined in the center of the annular sealing piece 20. The inner diameter of the annular sealing piece 20 is smaller than the inner diameter of the lens barrel 31, and the outer diameter is larger than the inner diameter of the lens barrel 31 and preferably smaller than the lens barrel 31. Outer diameter. The annular sealing piece 20 and the lens barrel 31 are made of the same or similar materials. If the material of the lens barrel 31 is metal, the material of the annular sealing piece 20 is also metal, if the material of the lens barrel 31 is In the case of plastic, the material of the annular sealing sheet 20 is also plastic.

Referring to FIG. 4 and FIG. 5, the lens barrel structure 30 and the annular sealing piece 20 are respectively clamped by a clamp (not shown) so that the barrel end portion 36 and the ring of the barrel structure 30 to be sealed are closed. The sealing sheets 20 are oppositely arranged, and the two clamps can be respectively rotated and relatively linearly moved. The adjustment jig is such that the central axes of the barrel structure 30 and the annular sealing sheet 20 are on the same straight line, and the barrel structure 30 and the annular sealing sheet 20 are rotated in opposite directions. At the same time, the annular sealing piece 20 is moved toward the side of the barrel structure 30, so that the annular sealing piece 20 is in contact with the barrel end portion 36 of the barrel structure 30 to be sealed, and the barrel structure 30 and the ring The sealing piece 20 is rotated in the opposite direction to make a circle The annular sealing piece 20 is rubbed against the barrel end portion 36 of the barrel structure 30 to be sealed.

Referring to FIG. 6 and FIG. 7, the heat generated by the barrel end portion 36 of the barrel structure 30 to be sealed and the annular sealing sheet 20 is caused to cause the barrel end portion 36 and the annular sealing sheet 20 to be both When the glass transition (Tg) temperature or higher is reached, the lens barrel structure 30 and the annular sealing sheet 20 are stopped from rotating.

After the lens barrel structure 30 and the annular sealing piece 20 stop rotating, the annular sealing piece 20 is immediately pressed to be slightly fed to the barrel structure 30, and the annular sealing piece 20 and the barrel structure 30 are crimped. The portion of the annular sealing sheet 20 is fused with the barrel end portion 36 of the barrel structure 30 to be sealed, and the annular sealing sheet 20 is closely attached to the filter 34, thereby separating the lens 32. An optical element such as the ring 33 and the filter 34 is pressed into the lens barrel 31 to form a lens barrel assembly 40.

If the materials of the lens barrel 31 and the annular sealing sheet 20 are all plastic, the solvent such as methanol, ethanol and acetone may be added during the friction welding according to the type of the plastic, and the end portion 36 of the lens barrel and the annular shape may be added. The bonding strength of the sealing sheet 20.

When assembling the lens module, it is necessary to assemble the lens barrel assembly 40 into the lens holder. For assembly, the outer circumference of the annular sealing piece 20 of the lens barrel assembly 40 can be appropriately turned or milled. Follow-up processing.

Compared with the prior art, the manufacturing method of the lens barrel assembly 40 of the embodiment of the present invention partially seals the annular sealing piece 20 to the end portion 36 of the lens barrel structure 30 on the side to be sealed by friction crimping, and The optical component is pressed into the lens barrel 31. Since the strength of the fusion joint is high, the optical component of the lens barrel assembly 40 is not easily detached from the lens barrel 31, and the lens barrel structure 30 is relatively tightly sealed, and the lens module is not easily damaged. Long life.

It can be understood that the manufacturing method of the lens barrel assembly is not limited to the embodiment, and the fixture can also be controlled. The lens barrel structure 30 is fixed, the annular sealing piece 20 is rotated, or the annular sealing piece 20 is fixed, and the lens barrel structure 30 is rotated; and then the control jig is moved to move the lens barrel structure 30 to the annular sealing piece 20 until contact. Or the control fixture moves the annular sealing sheet 20 to the lens barrel structure 30 until it contacts; the lens barrel structure 30 and the annular sealing sheet 20 are continuously rotated until the heat generated by the friction causes the barrel structure 30 to be sealed. When both the barrel end portion 36 and the annular sealing sheet 20 reach a glass transition temperature or higher, the control jig is stopped to rotate; the clamping barrel structure 30 or the annular sealing sheet 20 is moved, and the barrel structure 30 is crimped. The annular sealing piece 20 is such that the annular sealing piece 20 is melted together with the barrel end portion 36 of the barrel structure 30 to be sealed, and the optical components such as the lens 32, the spacer ring 33 and the filter 34 are pressed. It is close to the lens barrel 31.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

Claims (9)

A lens barrel assembly comprising a barrel structure, the barrel structure comprising a lens barrel and an optical component incorporated in the lens barrel, the improvement comprising: further comprising an annular sealing piece, the annular sealing piece being encapsulated in The end of the lens barrel is opened, and the optical element is pressed into the lens barrel. The annular sealing piece is sealed at the end of the opening of the barrel by frictional crimping. The lens barrel assembly of claim 1, wherein the annular sealing piece portion is frictionally pressed against the end of the barrel opening, so that the annular sealing piece is closely attached to the optical element. on. The lens barrel assembly of claim 1, wherein: the inner diameter of the annular sealing piece is smaller than the inner diameter of the lens barrel, and the outer diameter of the annular sealing piece is larger than the inner diameter of the lens barrel. . A manufacturing method of a lens barrel assembly, comprising the steps of: providing a lens barrel structure in which an optical element is incorporated into a lens barrel, and an annular sealing piece; and rotating the lens barrel structure and the annular sealing piece relative to each other, Rubbing the end of the barrel of the barrel structure to be sealed with the annular sealing piece; the heat generated by the end of the barrel to be sealed on the side of the barrel structure and the annular sealing piece causes the heat to be When both the end of the lens barrel and the annular sealing piece reach the glass transition temperature, the rotation is stopped; the annular sealing piece or the barrel structure is moved, and the annular sealing piece and the side of the barrel structure to be sealed are crimped. The end of the lens barrel is such that the annular sealing piece portion is in contact with the end of the lens barrel to press the optical element into the lens barrel. The manufacturing method of the lens barrel assembly according to claim 4, wherein the barrel structure and the annular sealing piece are respectively clamped by a clamp, and the clamp can drive the barrel structure and the annular sealing piece. Perform relative rotational motion and relative linear motion. The manufacturing method of the lens barrel assembly of claim 5, wherein the central axis of the barrel structure is on the same line as the central axis of the annular sealing piece. The method for manufacturing a lens barrel assembly according to claim 4, wherein the material of the lens barrel and the material of the annular sealing sheet are both metal. The manufacturing method of the lens barrel assembly according to claim 4, wherein the material of the lens barrel and the material of the annular sealing piece are both plastic. The manufacturing method of the lens barrel assembly of claim 4, wherein the inner diameter of the annular sealing piece is smaller than the inner diameter of the lens barrel, and the outer diameter of the annular sealing piece is larger than the lens barrel. The inner diameter.