TWI453495B - Lens module - Google Patents

Description

Lens module

The invention relates to a lens module, in particular to a lens module applied to a mobile phone.

With the development of optical imaging technology, lens modules are widely used in various imaging devices such as digital cameras, video cameras, and mobile phones. Portable electronic devices such as mobile phones incorporating lens modules are favored by many consumers.

The size of the lens of a mobile phone camera is generally small. After the lens assembly is placed in the lens barrel, the lens generally needs precise positioning. As shown in FIG. 1, the lens module 30 of the prior art mobile phone includes a lens barrel 302 and a lens 304 disposed in the lens barrel 302. The optical components such as the lens in the lens barrel 302 are generally fixed in the lens barrel 302 by dispensing. However, if the above-mentioned optical component is not firmly fixed or the glue is aged, the stability of the lens module 30 may be lowered. For example, when the lens module 30 is subjected to vibration, the optical components in the lens module 30 may move along the optical axis thereof, thereby reducing the stability of the internal structure of the lens module 30.

In view of this, it is necessary to provide a lens module with better structural stability.

A lens module includes a lens barrel and a first lens housed in the lens barrel. The lens barrel includes a side wall including an inner surface, the inner surface being formed with a first engaging surface. The first lens edge is formed with the first engagement The second engaging surface that matches the surface. The first engaging surface and the second engaging surface are engaged with each other to define movement of the first lens in the optical axis direction of the first lens.

Compared with the prior art, the lens module of the present invention is provided with an engaging surface on the inner wall of the lens barrel and the edge of the first lens. When the lens group is assembled into the lens barrel, the engaging surface can engage the lens, thereby improving the mirror. The stability of the barrel structure.

10,20,30‧‧‧ lens module

12,22,32‧‧ ‧Mirror tube

14,24,34‧‧‧ first lens

16,26,36‧‧‧second lens

18, 28, 38‧‧‧ third lens

122,222,322‧‧‧ side wall

124,224,324‧‧‧Loading Department

1222, 2222, 3222‧‧‧ inner surface

1242, 2242‧‧‧through hole

142,242,342‧‧‧ surface

1222a‧‧‧First annular arc convex

144‧‧‧First annular arc concave surface

2222a‧‧‧2nd annular arc concave surface

244‧‧‧Second annular arc convex

3222a‧‧‧First bevel

344‧‧‧Second slope

1 is a cross-sectional view of a prior art lens module.

2 is a cross-sectional view showing a lens module according to a first embodiment of the present invention.

3 is a cross-sectional view showing a lens module according to a second embodiment of the present invention.

4 is a cross-sectional view showing a lens module according to a third embodiment of the present invention.

The present invention will be specifically described below with reference to the accompanying drawings.

Embodiment 1

Referring to FIG. 2, a lens module 10 according to a first embodiment of the present invention includes a lens barrel 12 and a lens unit housed in the lens barrel 12. The lens unit includes a first lens 14, a second lens 16, and a third lens 18 in order from the object side to the image side. The lens unit has an optical axis OO'.

The lens barrel 12 is a cylindrical structure including a side wall 122 and a bearing portion 124 disposed at one end of the side wall 122. The side wall 122 includes an inner surface 1222 that forms a first annular circle that surrounds the first lens 14 and projects toward the optical axis OO' of the first lens 14 adjacent the carrier portion 124. Arc convex surface 1222a. The carrying portion 124 defines a through hole 1242, and the through hole 1242 can be Light from the outside is incident into the lens barrel 12.

The first lens 14 directly bears on the bearing portion 124 of the lens barrel 12, and its surface 142 is in contact with the inner surface of the bearing portion 124. The edge of the first lens 14 forms a first annular arc concave surface 144 recessed toward its optical axis OO', and the first annular circular arc concave surface 144 cooperates with the first annular circular convex surface 1222a, thereby The first lens 14 can be engaged inside the lens barrel 12.

The second lens 16 is affixed to the first lens 14, and the third lens 18 is affixed to the second lens 16. The first lens 14, the second lens 16, and the third lens 18 cooperate to form an image. The first lens 14, the second lens 16, and the third lens 18 may be spherical lenses or aspherical lenses. In the present embodiment, they are preferably aspherical lenses. The first lens 14, the second lens 16, and the third lens 18 may be a glass lens or a plastic lens or the like. In the present embodiment, it is preferably a plastic lens.

When assembled, the first lens 14, the second lens 16, and the third lens 18 are pasted to each other, and then the lens unit is forced into the lens barrel 12 to make the first ring of the first lens 14 The circular arc concave surface 144 is engaged with the first annular circular arc surface 1222a of the lens barrel 12. Therefore, when the lens module 10 is subjected to vibration, the lens unit is not displaced in the direction of the optical axis OO'.

Embodiment 2

Referring to FIG. 3 , a lens module 20 according to a second embodiment of the present invention includes a lens barrel 22 and a lens unit housed in the lens barrel 22 . The lens unit includes a first lens 24, a second lens 26, and a third lens 28 in order from the object side to the image side. The lens barrel 22 includes a sidewall 222 and one of the ends of the sidewall 222 Carrying unit 224. The side wall 222 includes an inner surface 2222. The first lens 24 directly bears on the carrying portion 224 of the lens barrel 22, and its surface 242 is in contact with the inner surface of the carrying portion 224.

The second embodiment differs from the first embodiment in that the inner surface 2222 of the lens barrel 22 forms a light around the first lens 24 and away from the first lens 24 near the carrier portion 224. The second annular arc concave surface 2222a is recessed in the direction of the axis OO'. The edge of the first lens 24 forms a second annular arc convex surface 244 protruding away from the optical axis OO' thereof, and the second annular circular arc convex surface 244 cooperates with the second annular circular arc concave surface 2222a. Thereby, the first lens 24 can be engaged in the lens barrel 22.

At the time of assembly, the lens unit is forced into the lens barrel 22 such that the second annular arc convex surface 244 of the first lens 24 and the second annular arc concave surface 2222a of the lens barrel 22 are Engage. Therefore, when the lens module 20 is subjected to vibration, the lens unit is not displaced in the direction of the optical axis OO'.

Embodiment 3

Referring to FIG. 4 , a lens module 30 according to a third embodiment of the present invention includes a lens barrel 32 and a lens unit housed in the lens barrel 32 . The lens unit includes a first lens 34, a second lens 36, and a third lens 38 in order from the object side to the image side. The lens barrel 32 includes a side wall 322 and a bearing portion 324 disposed at one end of the side wall 322. The side wall 322 includes an inner surface 3222. The first lens 34 directly bears on the bearing portion 324 of the lens barrel 32, and its surface 342 is in contact with the inner surface of the bearing portion 324.

The third embodiment is different from the first embodiment in that the lens barrel 32 is An inner surface 3222 forms a first slope portion 3222a surrounding the first lens 34 and protruding toward the optical axis OO' of the first lens 34 near the bearing portion 324, and the first slope portion 3222a is adjacent to the The diameter of the lens barrel at one end of the carrying portion 324 is larger than the diameter of the lens barrel away from the end of the carrying portion 324. The edge of the first lens 34 is formed with a second inclined surface portion 344 that cooperates with the first inclined surface portion 3222a. The diameter of the lens of the second inclined surface portion 344 near one end of the carrying portion 324 is larger than the distance from the bearing portion. The diameter of the lens at one end of 324. The first lens 34 surface 342 is in contact with the inner surface of the carrying portion 324, and the second inclined surface portion 344 and the first inclined surface portion 3222a are engaged with each other, so that the first lens 34 can be engaged Inside the barrel 32.

At the time of assembly, the lens unit is forcefully pressed into the lens barrel 32 such that the surface 342 of the first lens 34 is adhered to the inner surface of the carrier portion 324, and the second slope portion of the first lens 34 is 344 is engaged with the first inclined surface portion 3222a of the lens barrel 32. Thus, when the lens module 30 is subjected to vibration, the lens unit does not move in the direction of the optical axis OO'.

Compared with the prior art, the lens module of the present invention is provided with an engaging surface on the inner wall of the lens barrel, and when the lens group is loaded into the lens barrel, the engaging surface can engage the lens, thereby improving the stability of the lens barrel structure.

In addition, those skilled in the art can make other changes in the spirit of the present invention. Of course, the changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

10‧‧‧Lens module

12‧‧‧Mirror tube

14‧‧‧ first lens

16‧‧‧second lens

18‧‧‧ third lens

122‧‧‧ side wall

124‧‧‧Loading Department

142‧‧‧ surface

144‧‧‧First annular arc concave surface

1222‧‧‧ inner surface

1242‧‧‧through hole

1222a‧‧‧First annular arc convex

Claims (4)

A lens module includes a lens barrel and a first lens housed in the lens barrel, the lens barrel including a side wall, the side wall including an inner surface, wherein the inner surface is formed with a first surface a first engaging edge, wherein the first lens edge is formed with a second engaging surface that cooperates with the first engaging surface, and the first engaging surface and the second engaging surface are engaged with each other to define The first lens moves in the optical axis direction in the lens barrel; the first engaging surface is a first inclined surface, the diameter of the object side is larger than the diameter of the image side, and the second card The mating face is a second inclined surface that cooperates with the first inclined surface. The lens module of claim 1, wherein: the lens barrel is a cylindrical structure, and further includes a bearing portion disposed at one end of the side wall, the bearing portion is provided with a through hole, The through hole allows the outside light to be incident into the lens barrel. The lens module of claim 2, wherein the first engaging surface is formed at an inner surface of the side wall adjacent to the bearing portion. The lens module of claim 1, wherein the lens module further comprises a second lens and a third lens, the first lens, the second lens and the third lens along the lens The module side is set to the image side in order.