TWI403776B - Solidifying apparatus for ultraviolet glue and assembling method for lens module - Google Patents

Abstract

A solidifying apparatus for solidifying the ultraviolet glue sandwiched between elements of a lens module includes an ultraviolet light source and a pressing device for the lens module. The ultraviolet light source is used for emitting an ultraviolet light for shining the ultraviolet glue. The pressing device is used for pressing the element of the lens module and can prevent the elements from moving other elements, and then improving an acceptance rate of the lens module. A assembling method for a lens module using the solidifying apparatus is also provided.

Description

Ultraviolet glue curing device and lens module assembly method

The invention relates to an ultraviolet glue curing device, in particular to an ultraviolet glue curing device and a lens module assembling method applied to a lens module.

In recent years, with the development of optical products, the application range of lens modules has continued to expand, such as digital cameras and electronic products with camera functions. For electronic products, especially consumer electronic products, the development trend is lighter and thinner. The corresponding lens modules are also getting smaller and smaller, and the precision requirements are getting higher and higher. The assembly process of the module also requires higher precision and stability to ensure production efficiency and yield.

Generally, the assembly process of the lens module is as follows: First, the optical lens is assembled in the lens barrel; then a spacer ring is disposed adjacent to the optical lens, and an ultraviolet glue is disposed between the inner wall of the lens barrel and the spacer ring. Providing an ultraviolet light source, the ultraviolet light source emitting ultraviolet light to irradiate the ultraviolet glue between the inner wall of the lens barrel and the spacer ring to cure the ultraviolet glue to the inner wall of the lens barrel and the spacer ring; and the spacer ring The surface is provided with ultraviolet glue, an infrared cut filter is disposed on the surface of the spacer ring and bonded by the ultraviolet glue, and the ultraviolet glue is cured by ultraviolet light irradiation.

During the irradiation of the ultraviolet glue by the ultraviolet light, the ultraviolet glue expands, so that the ultraviolet light illuminates the ultraviolet glue between the inner wall of the lens barrel and the spacer ring. At the same time, the lens barrel and the spacer ring may be relatively displaced due to the expansion of the ultraviolet glue during the curing process, so that the axial direction of the spacer ring is deflected relative to the axial direction of the lens barrel; in addition, the expansion of the ultraviolet glue during the curing process is further It is possible to locally tilt the infrared cut filter on the surface of the spacer ring to affect the optical performance of the infrared cut filter in the lens module, thereby greatly affecting the assembly yield.

In view of this, it is necessary to provide an ultraviolet glue curing device and a lens module assembly method which can improve the assembly yield.

An ultraviolet glue curing device for curing an ultraviolet glue between components in a lens module, comprising an ultraviolet light source, a tray, a plurality of clamps and a lens module pressing device. The ultraviolet light source is configured to emit ultraviolet light to irradiate ultraviolet glue between components in the lens module, the tray is used to place the lens module, and the lens module pressing device is used for the lens The lens module pressing device comprises a transparent plate and at least one pressing block disposed on the surface of the transparent plate, each of the clamping devices comprising an L-shaped plate and one end portion a nut stud and a pressure regulating plate, wherein the tray is disposed on a surface of the L-shaped pallet, one end of the L-shaped pallet is provided with a screw hole, and the surface of the pressure regulating plate is provided with a through hole The stud passes through the through hole and is engaged with the screw hole, the pressure regulating plate is in contact with the transparent plate and presses the transparent plate to press the press block Elements in the lens module to maintain relative fixation between components in the lens module.

Compared with the prior art, the ultraviolet glue curing device adopts a lens module pressing device for components in the lens module (such as a spacer ring or infrared The cut-off filter is pressed to effectively prevent the spacer ring from moving relative to the lens barrel during the curing process of the ultraviolet glue, and at the same time prevent the infrared cut-off filter from being locally lifted on the surface of the spacer ring, thereby improving the assembly of the lens module. rate.

In addition, in the ultraviolet glue curing step of the lens module assembly method, the components in the lens module are pressed together, thereby effectively improving the assembly yield.

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

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams showing the combination of the ultraviolet glue curing device 20 and the lens module 10 to be assembled according to an embodiment of the present invention. The lens module 10 is a semi-finished product, and includes a lens barrel 12, a lens group 14 disposed in the lens barrel 12, and a spacer ring 16 disposed on one side of the lens group 14. The spacer ring 16 is bonded to the inner side of the lens barrel 12 by an ultraviolet glue 18. The lens group 14 can be a single lens or a combination of a plurality of lenses. In this embodiment, a combination of two lenses is taken as an example.

The UV adhesive curing device 20 includes a tray 22, an ultraviolet light source 24, and a lens module pressing device 26. The tray 22 is configured to hold the lens module 10, and a plurality of placement slots 222 are arranged on the surface of the lens module 10. For convenience of description, the number of the slots 222 is 4, the lens is illustrated. The module 10 is placed in the placement slot 222. The size of the placement slot 222 is adapted to the lens module 10 to ensure that the lens module 10 can be well positioned within the placement slot 222 without relative movement with the tray 22.

The ultraviolet light source 24 can emit ultraviolet light 242 for curing the purple The outer glue 18 is used to achieve a firm bond between the lens barrel 12 and the spacer ring 16. The lens module pressing device 26 includes a transparent plate 262 and a plurality of pressing blocks 264 disposed on the surface of the transparent plate 262. The transparent plate 262 is used to mount the pressing block 264 thereon, and the material thereof is a plexiglass material or glass. Preferably, the plexiglass material is Acrylic Materials. Of course, the transparent plate 262 can also be other transparent materials as long as it can be penetrated by the ultraviolet light 242. The arrangement of the pressing block 264 on the surface of the transparent plate 262 corresponds to the arrangement of the placing grooves 222 on the tray 22 to achieve the pressing of the pressing block 264 against the lens module 10 disposed in the placing groove 222.

In this embodiment, the pressing block 264 is cylindrical and includes a conical end 266. The center of the spacer ring 16 is a circular through hole 162. The end portion 266 can enter the through hole 162 and press against the inner side of the through hole 162 to press the spacer ring 16. The outer diameter of the pressing block 264 is smaller than the lens barrel 12, so that the ultraviolet light 242 can enter the lens barrel 12 to cure the ultraviolet glue 18.

The UV adhesive curing device 20 further includes a plurality of clamps 28 for mutually fixing the lens module pressing device 26 and the lens module 10 and adjusting the pressure of the pressing block 264 against the spacer ring 16. The clamp 28 includes an L-shaped support plate 282, a stud 286 having a nut 284 at one end thereof, and a pressure adjustment plate 288. The tray 22 is disposed on one surface of the L-shaped pallet 282, and one end of the L-shaped pallet 282 is provided with a screw hole (not shown), and an inner thread is disposed inside the screw hole. The outer surface of the stud 286 is provided with an external thread 2862, and the inner thread of the inner side of the screw hole and the external thread 2862 can mesh with each other. The surface of the pressure regulating plate 288 is provided with a through hole (not shown), and the through hole has a smaller size than the The nut 284 is larger than the stud 286, and the stud 286 passes through the through hole of the surface of the pressure regulating plate 288 and is engaged with the internal thread of the inner side of the screw hole. The pressure regulating plate 288 and the L-shaped plate 282 form a "匚" shaped area (not labeled), the transparent plate 262 and the tray 22 are disposed in a "匚" shaped area, and the transparent plate 262 is pressed by the pressure regulating plate 288 Lamination. The pressure of the press block 264 against the spacer ring 16 can be adjusted by adjusting the depth of the stud 286 into the screw hole at one end of the L-shaped plate 282.

It can be understood that the clamp 28 can be in other forms as long as the mutual fixation of the lens module pressing device 26 and the lens module 10 and the adjustment of the pressure of the pressing block 264 to the spacer ring 16 can be achieved. .

The material of the pressing block 264 may be copper, stainless steel, plastic or the like, as long as the purpose of pressing the spacer ring 16 can be achieved. It can be understood that the shape of the end portion 266 of the pressing block 264 can also be other shapes. As shown in FIG. 3, the end portion 266a of the pressing block 264a can be a truncated cone (the cone of the tip is removed); As shown in Fig. 4, the end portion 266b of the press block 264b may be in the shape of a spherical portion.

Compared with the prior art, the ultraviolet glue curing device 20 of the present embodiment adopts the lens module pressing device 26, and passes through the pressing block 264 during the curing of the ultraviolet glue 18 of the lens barrel 12 and the spacer ring 16 The spacer ring 16 is pressed at a certain pressure, so that the displacement of the spacer ring between the lens barrel 12 and the lens barrel 12 due to the expansion of the ultraviolet glue 18 during the curing process of the ultraviolet glue 18 can be effectively prevented, so that the cured ultraviolet glue 18 is spaced apart. The distribution between the ring 16 and the barrel 12 is more uniform.

As shown in FIG. 5, the present invention further provides a lens module press assembly of another embodiment. Set 36. The lens module pressing device 36 is used to press the other lens module 40. The lens module 40 is substantially the same as the lens module 40 of the first embodiment. The difference is that after the spacer ring 16 is mounted in the lens barrel 12, an infrared cut filter 30 is disposed on the surface of the spacer ring 16 . The ultraviolet cut-off filter 30 is also bonded to the spacer ring 16 by an ultraviolet glue 48. The lens module pressing device 36 of the present embodiment is substantially the same as the lens module pressing device 26 of the first embodiment, except that the pressing block 364 of the embodiment is a cylinder as a whole, and the end portion thereof is A plane for pressing the infrared cut filter 30. Considering that the infrared cut filter 30 is a relatively precise optical lens, the material of the press block 364 may be a soft material such as Teflon.

The lens module pressing device 36 of the present embodiment is used to pressurize the infrared cut filter 30 when the ultraviolet light 242 cures the ultraviolet adhesive 48, thereby preventing the infrared cut filter 30 from being expanded due to the expansion of the ultraviolet adhesive 48. The tilting of the surface of the spacer ring 16 also makes the distribution of the ultraviolet glue 48 between the infrared cut filter 30 and the spacer ring 16 more uniform.

It can be understood that the ultraviolet glue curing device of the embodiment of the present invention can also be applied to the case where the ultraviolet glue curing process is required in the component assembly process of the other lens module, and is not limited to the spacer ring and the infrared cut filter in the above embodiment. Assembly of light sheets.

2 and FIG. 5, the present invention further provides a lens module assembly method according to another embodiment. The lens module assembly method includes the steps of: assembling the lens group 14 into the lens barrel 12; positioning the spacer ring 16 adjacent to the lens group 14 and on the inner wall of the lens barrel 12 An ultraviolet glue 18 is disposed between the spacer rings 16; the spacer ring 16 is pressed together, and the ultraviolet light source 24 is provided to irradiate the ultraviolet glue 18 to cure, so as to achieve the bonding between the inner wall of the lens barrel 12 and the spacer ring 16. In this embodiment, the spacer ring is pressed by the lens module pressing device 26; the ultraviolet glue 48 is disposed on the surface of the spacer ring 16, and the infrared cut filter 30 is disposed on the surface of the spacer ring 16 and is The ultraviolet glue 48 is bonded; the infrared cut filter 30 is pressed together, and the ultraviolet light source 24 is provided to irradiate the ultraviolet glue 48 to cure, so as to achieve the bonding between the infrared cut filter 30 and the spacer ring 16, the implementation For example, the lens module pressing device 36 is provided to press the infrared cut filter 30.

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 the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application.

10,40‧‧‧ lens module

12‧‧‧Mirror tube

14‧‧‧ lens group

16‧‧‧ spacer ring

162‧‧‧through hole

18,48‧‧‧UV adhesive

22‧‧‧Tray

20‧‧‧UV adhesive curing device

222‧‧‧Place slot

24‧‧‧UV source

242‧‧‧UV light

26,36‧‧‧Lens module pressing device

262‧‧‧Transparent board

264, 264a, 264b, 364‧‧ ‧ press block

28‧‧‧Clamp

266, 266a, 266b‧‧‧ end

282‧‧‧L-shaped pallet

284‧‧‧ nuts

286‧‧ stud

2862‧‧‧ external thread

288‧‧‧pressure adjustment board

30‧‧‧Infrared cut filter

1 is a perspective view showing a combination of a UV adhesive curing device and a lens module according to an embodiment of the present invention.

Figure 2 is a schematic cross-sectional view taken along line II-II of Figure 1.

3 and 4 are schematic cross-sectional views showing two other embodiments of the press block of Fig. 2.

5 is a schematic cross-sectional view of a lens module pressing device according to a second embodiment of the present invention; Figure.

10‧‧‧Lens module

20‧‧‧UV adhesive curing device

22‧‧‧Tray

222‧‧‧Place slot

24‧‧‧UV source

242‧‧‧UV light

26‧‧‧Lens module pressing device

262‧‧‧Transparent board

264‧‧‧ Pressing block

28‧‧‧Clamp

282‧‧‧L-shaped pallet

284‧‧‧ nuts

286‧‧ stud

2862‧‧‧ external thread

288‧‧‧pressure adjustment board

Claims (7)

An ultraviolet glue curing device for curing ultraviolet glue between components in a lens module, the ultraviolet glue curing device comprising an ultraviolet light source for emitting ultraviolet light between components in the lens module The ultraviolet glue irradiation is improved in that the ultraviolet glue curing device further comprises a lens module pressing device, a tray and a plurality of clamps, wherein the tray is used for placing the lens module, and the lens module is pressed The device is configured to press the components in the lens module, the lens module pressing device includes a transparent plate and at least one pressing block disposed on the surface of the transparent plate, and each of the clamping devices includes an L a plate, a stud with a nut at one end and a pressure regulating plate, the tray being disposed on a surface of the L-shaped plate, one end of the L-shaped plate being provided with a screw hole, the pressure The surface of the adjusting plate is provided with a through hole, the stud passing through the through hole and engaging with the screw hole, the pressure adjusting plate is in contact with the transparent plate and presses the transparent plate to make Pressing the pressure piece to press the mirror The elements in the module, to maintain a relatively constant between the lens module of the said elements. The ultraviolet glue curing device according to claim 1, wherein the material of the transparent plate is a plexiglass material or glass. The ultraviolet glue curing device of claim 2, wherein the plexiglass material is a transparent acrylic material. The ultraviolet glue curing device according to claim 1, wherein the end portion of the pressing block is a conical shape, a truncated cone shape or a spherical portion. The ultraviolet glue curing device according to claim 1, wherein the material of the pressing block is copper, stainless steel or plastic material. The ultraviolet glue curing device as described in claim 5, wherein The plastic material is Teflon. The ultraviolet glue curing device of claim 1, wherein the tray surface is provided with a placement groove, and the lens module is disposed in the placement groove.