TWI463860B - Method for fixing lens set - Google Patents

Description

Fixing method of lens group

The present invention relates to a fixing method, and more particularly to a method of fixing a lens group of a contact image sensor (CIS) module.

Today's scanning devices mostly use a contact image sensor (CIS) module as a sensing element for scanning. The contact image sensor module 50 can be applied to optical devices such as scanners, facsimile machines, and multifunction printers.

Please refer to FIG. 1 , which is a schematic diagram of a conventional contact image sensor module 1 . The contact image sensor module 1 includes a base 10, a lens group 12, a light source 14, and a sensor group (not shown) located below the lens group 12. The lens group 12 and the susceptor 10 are joined and fixed by dispensing. As shown in FIG. 1, the susceptor 10 has a plurality of grooves 16. After the lens group 12 is placed in the susceptor 10, an adhesive is applied to the grooves 16 to complete the fixation of the lens group 12 and the susceptor 10. However, the method of fixing by the adhesive is liable to cause uneven coating, and the adhesive is likely to contaminate the lens group 12, causing the function of the lens group 12 to be affected.

Please refer to FIG. 2 , which is a schematic diagram of another conventional contact image sensor module 2 . Although the contact image sensor module 2 and the contact image sensor module 1 shown in FIG. 1 are slightly different in structure, the main components thereof and the contact image sensor module shown in FIG. Group 1 is identical, including susceptor 10, lens group 12, light source 14, and a sensor group (not shown) located below lens group 12. As shown in FIG. 2, the base has a plurality of hooks 20 for fixing the lens group 12 in the base 10. However, the method of fixing the hook 20 may cause a problem of swaying, resulting in a poor fixing effect of the lens group 12.

Therefore, it is necessary to propose a solution to the disadvantages of the conventional lens group 12 fixing method.

It is an object of the present invention to provide a method of securing a lens assembly that provides a fast and contamination-free manner for securing a lens assembly.

The method for fixing a lens group according to the present invention is applicable to a contact image sensor module. The fixing method includes: providing a base and a lens group, wherein the base and the outer casing of the lens group are super a sound fused material; forming a groove in the pedestal; placing the lens group in the groove; and fusing the lens group and at least one intersection of the groove with ultrasonic waves to make the lens The set is fixed in the groove.

Compared with the prior art, the fixing method of the lens group of the present invention has the following advantages: (1) fixing the lens group by means of ultrasonic fusion, and there is no conventional use of adhesive coating unevenness and contamination of the lens group. problem. (2) Fixing the lens group by means of ultrasonic fusion, there is no known situation in which it is easy to shake when the hook is fixed. (3) Fixing the lens group by means of ultrasonic fusion does not generate waste, and subsequent processing is more convenient and environmentally friendly. (4) Fixing the lens group by means of ultrasonic fusion is fast, and the manufacturing time course of the contact image sensor module can be shortened.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Please refer to FIG. 3 and FIG. 4 at the same time. FIG. 3 is a flow chart showing a method for fixing a lens assembly according to the present invention, which is applicable to the contact image sensor module 4 as shown in FIG. The fixing method comprises the following steps: in step S300, a base 10 and a lens group 12 are provided, wherein the lens group 12 is formed by plastic injection molding.

The outer casing of the lens group 12 is made of ultrasonically fused material, and can be ultrasonically fused, such as Acrylonitrile-Butadene-Styrene (ABS), acetal resin ( ACETAL), Acrylic Resin (PMMA), Polyphenylene Oxide (NORYL), Nylon (NYLON), Polycarbonate (PC), Polyethylene (PE), Polypropylene (PP) ), polystyrene (PS), polystyrene (POLYSULFONE), polyvinyl chloride (PVC), styrene acrylonitrile (SAN), polyester acid grease (POLYSTER) and polypropylene eye-Olong (XT- POLYMER) is made of at least one of the groups formed.

The susceptor 10 is made of a material that can be ultrasonically fused, such as Acrylonitrile-Butadene-Styrene (ABS), acetal resin (ACETAL), acrylic (Acrylic Resin, PMMA), polyphenylene oxide (NORYL), nylon (NYLON), polycarbonate (Polycarbonate, PC), polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), polystyrene ( PS), POLYSULFONE, Polyvinyl Chloride (PVC), Styrene Acrylic (SAN), Polyester (POLYSTER) and Polypropylene-Xi-POLYMER Made by at least one of them.

In step S310, a recess 40 is formed in the base 10. Since the purpose of the groove 40 is to accommodate the lens group 12, the size of the groove 40 needs to be at least equal to the size of the lens group 12.

In step S320, the lens group 12 is placed in the groove 40.

In step S320, the lens group 12 and at least one intersection 42 of the groove 40 are fused by ultrasonic waves to fix the lens group 12 in the groove 40. That is to say, the lens group 12 and the intersection 42 of the groove 40 are subjected to high frequency friction, so that the molecules rapidly generate heat, and when the heat is sufficient to melt the lens group 12 and the intersection of the groove 40, stop the super The sound wave is oscillated, and the intersection of the lens group 12 and the groove 40 is melted and solidified, thereby completing the fixing of the lens group 12 and the susceptor 10.

In the step of ultrasonic fusion in step S320, first, a fusion time and a fusion range are set in advance. In a preferred embodiment, the ultrasonic fusion time is between 0.1 and 3 seconds, and the ultrasonic fusion range is at least greater than 0.2 square millimeters, and the fusion range needs to cover both the lens assembly 12 and the base 10. The lens group 12 and the at least one intersection 42 of the groove 40 are then fused according to the predetermined fusion time and the fusion range, wherein the ultrasonic fusing operation frequency is between 10,000 and 40000 Hz.

Taking FIG. 4 as an example, ultrasonic fusion is performed on the six intersections 42 of the lens group 12 and the susceptor 10. The six junctions 42 are symmetrically located on the upper and lower sides of the lens group 12. In other embodiments, the intersection 42 for performing ultrasonic fusion is not limited in number, and its position may also be asymmetric, for example, ultrasonic fusion is performed at two junctions on the upper side of the lens group 12 and one junction on the lower side. .

Compared with the prior art, the fixing method of the lens group 12 of the present invention has the following advantages: (1) fixing the lens group 12 by means of ultrasonic fusion, and there is no conventional use of adhesive coating unevenness and contamination lens. Group 12 questions. (2) Fixing the lens group 12 by means of ultrasonic fusion does not occur in a case where it is easy to shake when the hook is fixed. (3) Fixing the lens group 12 by means of ultrasonic fusion does not generate waste, and subsequent processing is more convenient and environmentally friendly. (4) Fixing the lens group 12 by means of ultrasonic fusion is fast, and the manufacturing time course of the contact image sensor module 4 can be shortened.

In view of the above, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the invention, and the present invention may be made without departing from the spirit and scope of the invention. Various modifications and refinements are made, and the scope of the present invention is defined by the scope of the appended claims.

1, 2, 4. . . Contact image sensor module

10. . . Pedestal

12. . . Lens group

14. . . light source

16. . . Trench

20. . . The hook

40. . . Groove

42. . . Junction

S300-S330. . . step

1 is a schematic view showing a conventional contact image sensor module;

2 is a schematic view showing another conventional contact image sensor module;

3 is a flow chart showing a method of fixing a lens group according to the present invention;

Fig. 4 is a view showing a contact image sensor module manufactured by the fixing method of the lens group of the present invention.

S300-S330. . . step

Claims (10)

A method for fixing a lens group is applicable to a contact image sensor module, the fixing method includes: providing a base and a lens group, wherein the base and the outer casing of the lens group are ultrasonically fused Forming a material; forming a groove in the base; placing the lens group in the groove; and fusing the lens group and at least one intersection of the groove by ultrasonic waves to fix the lens group to In the groove. The fixing method of claim 1, wherein the groove has a size at least equal to or larger than a size of the lens group. The fixing method of claim 1, wherein the lens group is formed by plastic injection molding. The fixing method according to claim 1, wherein the outer casing of the lens group is made of acrylonitrile-butadiene-styrene copolymer, acetal resin, acrylic, polyphenylene oxide, nylon, At least one of a group consisting of polycarbonate, polyethylene, polypropylene, polystyrene (PS), polyfluorene, polyvinyl chloride, styrene acrylonitrile (SAN), polyester acid fat, and polypropylene eye-Olong Made by one. The fixing method according to claim 1, wherein the susceptor is made of acrylonitrile-butadiene-styrene copolymer, acetal resin, acrylic, polyphenylene oxide, nylon, polycarbonate At least one of a group consisting of ester, polyethylene, polypropylene, polystyrene (PS), polyfluorene, polyvinyl chloride, styrene acrylonitrile (SAN), polyester acid fat, and polypropylene eye-Olong Made. The fixing method of claim 1, wherein the step of fusing the lens group and the at least one intersection of the grooves by ultrasonic waves comprises: setting a fusion time and a fusion range; and according to the fusion time and The fusion range fuses the lens group and the at least one intersection of the grooves. The fixing method of claim 6, wherein the fusion time is between 0.1 and 3 seconds. The fixing method of claim 6, wherein the fusion range is at least greater than 0.2 mm 2 . The fixing method of claim 6, wherein the fused range covers both the lens group and the pedestal. The fixing method of claim 1, wherein the ultrasonic fusing operation frequency is between 10,000 and 40000 Hz.