CN105100555A - Image sensing module and method for adjusting focal length of image sensing module - Google Patents

Abstract

The present invention discloses an image sensing module and a method for adjusting the focal length of the image sensing module. The image sensing module comprises a substrate, an image sensor mounted on the substrate, a fixing seat disposed on the substrate, a lens barrel for fixing a lens module, and at least one spring, wherein the spring is disposed between the fixing seat and the lens barrel, and the spring applies elastic force to the fixing seat and the lens barrel; and the lens barrel has at least one through hole, and a bolt passes through the through hole and is screwed into the fixing seat.

Description

Image sensing module and method for adjusting focal length of image sensing module

technical field

The present invention relates to an image sensing module, in particular to an image sensing module and a method for adjusting the focal length of the image sensing module.

Background technique

Please refer to FIG. 1, which illustrates a conventional image sensing module 100. As shown in FIG. 1, the image sensing module 100 includes a substrate 110, an image sensor 120, a holder 130, A lens module 140 and a lens barrel 150 . When the image sensing module 100 needs to adjust the focal length, the user can adjust by rotating the lens barrel 150 so that the lens barrel 150 moves relative to the fixing base 130 to increase or decrease the distance between the image sensor 120 and the lens module 140 The focal length of the image sensing module 100 .

However, when the lens module 140 has more than one lens, such as four lenses shown in FIG. 2 , the image sensor module 100 may encounter some problems when adjusting the focus. As shown in FIG. 2 , when the lens barrel is rotated (that is, a lens module 240 is rotated), some lenses in the lens module 240 will exceed the sensing area 222 of the image sensor 220, causing the image sensor 220 to fail to sense. All rays passing through the lenses of the lens module 240 are measured.

In addition, after the image sensing module 100 is assembled, the lens barrel 150 may have a problem of tilting (tilt), thus causing the image sensed by the image sensor 120 to become blurred, but the image shown in FIG. 1 The sensing module 100 cannot easily solve this problem.

Contents of the invention

Therefore, one object of the present invention is to provide an image sensing module and a method for adjusting the focal length of the image sensing module to solve the above problems.

According to an embodiment of the present invention, an image sensing module includes a substrate, an image sensor mounted on the substrate, a fixing seat disposed on the substrate, a lens barrel for fixing a lens module, and at least one spring, wherein the spring is arranged between the fixing seat and the lens barrel, and the spring exerts force on the fixing seat and the lens barrel; and the lens barrel has at least one through hole, and a bolt penetrates the through hole And screw into a bolt hole on the fixing seat.

According to an embodiment of the present invention, a method for adjusting the focal length of an image sensing module is disclosed, wherein the image sensing module includes a substrate, an image sensor mounted on the substrate, and an image sensor disposed on the substrate. A fixing seat, a lens barrel for fixing a lens module, and at least one spring, wherein the spring is arranged between the fixing seat and the lens barrel, and the spring will exert force on the fixing seat and the lens barrel; And the lens barrel has at least one through hole, and a bolt penetrates the through hole and is screwed into a bolt hole on the fixing seat; and the method includes: tightening the bolt or loosening the bolt to adjust the fixing seat and the distance between the lens barrels to adjust the focal length of the image sensing module.

Description of drawings

FIG. 1 is a schematic diagram of a conventional image sensing module;

FIG. 2 is a schematic diagram showing that some lenses in the lens module are not in the sensing area of the image sensor when a lens barrel is rotated;

FIG. 3 is a schematic diagram of components of an image sensing module according to an embodiment of the present invention before being assembled;

4 is a cross-sectional view of the image sensing module after assembly;

5 is a schematic diagram of adjusting the focal length of the image sensing module by tightening or loosening the bolts;

FIG. 6 is a schematic diagram of an image sensing module according to another embodiment of the present invention.

Symbol Description

100, 300 Image sensor module 110, 310 Substrate 120, 220, 320 image sensor 130, 330 Fixing seat 140, 240, 340 lens module 150, 360 lens barrel 222 Sensing area 322, 324 Locating bolt 332_1, 332_2, 332_3, 332_4 Bolt hole 334, 364 to open 350_1, 350_2, 350_3, 350_4, 650 Compression coil spring 362_1, 362_2, 362_3, 362_4 perforation 370_1, 370_2, 370_3, 370_4 bolt

510 wrench

Detailed ways

Please refer to FIG. 3 and FIG. 4 at the same time, wherein FIG. 3 is a schematic diagram of components of the image sensing module 300 according to an embodiment of the present invention before assembly, and FIG. 4 is a cross-sectional view of the image sensing module 300 after assembly. As shown in FIG. 3 , the image sensing module 300 includes a substrate 310, an image sensor 320, two positioning pins 322, 324, a fixing seat 330, a lens module 340, four springs (in this embodiment , are four pressure coil springs 350_1, 350_2, 350_3, 350_4), a lens barrel 360, and four bolts 370_1, 370_2, 370_3, 370_4. The image sensor 320 is installed on the base plate 310, the fixing seat 330 has an opening 334 and four bolt holes 332_1, 332_2, 332_3, 332_4, the lens barrel 360 fixes the lens module 340 by an adhesive, and the lens barrel 360 It includes four through holes 362_1 , 362_2 , 362_3 , 362_4 and an opening 364 .

In this embodiment, the lens module 340 includes a lens array, and the lens module 340 includes four lenses, however, the number of lenses in the lens module 340 is not a limitation of the present invention, in other embodiments, the lens in the lens module 340 The number of can vary by designer considerations.

As shown in Figure 3, the pressure coil springs 350_1, 350_2, 350_3, 350_4 are arranged between the fixed base 330 and the lens barrel 360, and each bolt 370_1, 370_2, 370_3, 370_4 passes through the perforations 362_1, 362_1, 370_4 on the lens barrel 360 respectively. 362_2 , 362_3 , 362_4 and compression coil springs 350_1 , 350_2 , 350_3 , 350_4 are used to relatively fix the lens barrel 360 to the fixing seat 330 , wherein each bolt is located in the corresponding compression coil spring. In detail, the bolt 370_1 penetrates through the center of the through hole 362_1 and the pressure coil spring 350_1 to connect to the bolt hole 332_1, the bolt 370_2 penetrates through the center of the through hole 362_2 and the pressure coil spring 350_2 to connect to the bolt hole 332_2, and the bolt 370_3 penetrates The center of the through hole 362_3 and the pressure coil spring 350_3 is connected to the bolt hole 332_3, and the bolt 370_4 is passed through the center of the through hole 362_4 and the pressure coil spring 350_4 to be connected to the bolt hole 332_4.

Please refer to FIG. 4 , after the image sensing module 300 is assembled, the pressure coil springs 350_1, 350_2, 350_3, 350_4 exert elastic force on the lens barrel 360 and the fixing seat 330, and because the lens barrel 360 simultaneously bears the bolts 370_1, 370_2 , 370_3, 370_4 the pressure exerted by the bolt heads and the elastic tension exerted by the pressure coil springs 350_1, 350_2, 350_3, 350_4, so the lens barrel 360 can be fixed on the fixing seat 330. Then, the image sensor 320 can sense the light penetrating from the outside through the opening 364 of the lens barrel 360 , the lens module 360 , and the opening 334 of the fixing seat 330 .

When the focal length of the lens module 340 does not accurately fall on the image sensor 320 , the image sensing module 300 needs to adjust the focal length so that the image sensor 320 can produce a clear image. Now, referring to FIG. 5 , the engineer can use a wrench 510 or a screwdriver to reduce or increase the distance between the lens barrel 360 and the holder 330 by tightening or loosening the bolts 370_1, 370_2, 370_3, 370_4. distance (ie, decrease or increase the distance between the lens module 340 and the image sensor 320 ) to adjust the focal length of the image sensor module 300 . In one embodiment, the engineer can use a wrench 510 or a screwdriver to tighten the bolts to reduce the distance between the lens barrel 360 and the fixing seat 330, and use the wrench 510 or a screwdriver to loosen the bolts to increase the distance between the lens barrel 360 The distance from the fixed seat 330.

As mentioned above, when adjusting the focal length of the image sensor module 300 , the lens module 340 does not need to rotate, therefore, the lens in the lens module 340 will always be within the sensing area of the image sensor 320 .

In addition, when the lens barrel 360 is tilted after the image sensing module 300 is assembled, the engineer can simply use a wrench or a screwdriver to tighten or loosen one or two bolts to solve the tilt problem.

In addition, in the embodiment shown in FIG. 3 and FIG. 4 , four bolts and four springs are included, however, this is not a limitation of the present invention. In other embodiments, the number of bolts, springs, and bolt holes can be changed according to the designer's consideration. For example, the image sensing module 300 shown in FIG. 3 can be modified to only include two bolts ( For example 370_1 and 370_4), and two pressure coil springs (for example 350_1, 350_4). In another embodiment, the image sensing module 300 shown in FIG. 3 can be modified to include only one bolt and one compression coil spring, which are disposed near the center of the image sensing module 300 . The above-mentioned changes in these designs should all belong to the category of the present invention.

In the image sensing module 300 shown in FIG. 3 , four pressure coil springs 350_1 , 350_2 , 350_3 , 350_4 are included, and four bolts 370_1 , 370_2 , 370_3 , 370_4 are located on the pressure coil springs 350_1 , 350_2 , 350_3 , respectively. In the center of 350_4 , however, in other embodiments, the pressure coil spring can be disposed at other positions to exert elastic force on the lens barrel 360 and the fixing seat 330 . Please refer to FIG. 6 . FIG. 6 is a schematic diagram of an image sensing module 600 according to another embodiment of the present invention. The image sensing module 600 is similar to the image sensing module 300 shown in FIG. 3 , the main difference lies in the design of the spring. In the image sensing module 600 , a compression coil spring 650 is disposed at the center of the lens barrel 360 and the fixing seat 330 , and the compression coil spring 650 exerts elastic force on the surrounding area of the lens module 340 .

To briefly summarize the present invention, in the image sensing module and the method for adjusting the focal length of the image sensing module of the present invention, when adjusting the focal length of the image sensing module, the lens module itself does not need to rotate, therefore, the lens in the lens module will always be within the sensing area of the image sensor.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (10)

1. An image sensing module, comprising: Substrate; an image sensor installed on the substrate; the fixing seat is arranged on the base plate; a lens barrel for fixing a lens module; and At least one spring is arranged between the fixing seat and the lens barrel for exerting elastic force on the fixing seat and the lens barrel; Wherein the lens barrel includes at least one through hole, and a bolt passes through the through hole and is screwed into the fixing seat. 2. The image sensing module as claimed in claim 1, wherein the spring is a compression coil spring, and the bolt is located in the compression coil spring. 3. The image sensing module as claimed in claim 1, wherein the image sensing module comprises four pressure coil springs arranged between the fixing seat and the lens barrel, the lens barrel has four through holes, and four bolts The four through holes are respectively passed through to relatively fix the lens barrel on the fixing seat, and each bolt is located in a corresponding pressure coil spring. 4. The image sensing module as claimed in claim 3, wherein the four through holes are respectively disposed at four corners of the lens barrel. 5. The image sensing module as claimed in claim 1, wherein the lens module is disposed at the center of the lens barrel, the spring is disposed at the center of the lens barrel and the fixing seat, and the spring exerts elastic force on the lens module on the surrounding area. 6. The image sensing module as claimed in claim 1, wherein the lens module comprises a lens array, and the lens array comprises more than one lens. 7. The image sensing module as claimed in claim 1, wherein the fixing base comprises at least one bolt hole for connecting the bolt, and the distance between the fixing base and the lens barrel is adjusted by tightening or loosening the bolt Adjustment. 8. The image sensing module as claimed in claim 7, wherein the distance between the fixing base and the lens barrel is reduced by tightening the bolt, and the distance between the fixing base and the lens barrel is loosened by loosening the bolts to increase. 9. A method for adjusting the focal length of an image sensing module, wherein the image sensing module comprises: Substrate; an image sensor installed on the substrate; the fixing seat is arranged on the base plate; The lens barrel is used to fix a lens module; At least one spring is arranged between the fixing seat and the lens barrel for exerting elastic force on the fixing seat and the lens barrel; Wherein the lens barrel includes at least one through hole, and a bolt penetrates through the through hole and is screwed into the fixing seat; and This method contains: Tighten the bolt or loosen the bolt to adjust the distance between the fixing seat and the lens barrel, so as to adjust the focal length of the image sensing module. 10. The method according to claim 9, wherein the step of tightening the bolt or loosening the bolt to adjust the distance between the fixing seat and the lens barrel to adjust the focal length of the image sensing module comprises: Tighten the bolt to reduce the distance between the fixing seat and the lens barrel; and Loosen the bolt to increase the distance between the mount and the lens barrel.