TWM451549U - Lens module - Google Patents

Description

Lens module

The present invention relates to a lens module, and more particularly to a small lens module for use in mobile electronic products, which is manufactured with high precision and is easy to produce.

With the popularization of camera phones, the camera function of mobile phones has become one of the main determinants of consumers when purchasing new phones. In order to make the photographic quality better, and the volume and weight are lighter and thinner, the error tolerance when assembling the optical lens is also smaller. In the case of a photographic lens of 2 million pixels, the eccentricity error between the optical lenses must be less than 3 μm.

Referring now to the first figure, there is shown an existing lens module comprising a lens sleeve 90 and a plurality of optical lenses 91 mounted in the lens sleeve 90. Each of the optical lenses 91 further includes a lens portion 92 close to the optical axis 94 and a positioning portion 93 away from the optical axis 94. The positioning portion 93 of the optical lens 91 is assembled with the lens sleeve 90, and all the optical lenses 91 are fixed by the lens sleeve 90. Therefore, in the existing lens module, the manufacturing error of the lens sleeve 90 will be superimposed on the assembly error of the optical lens 91, and the assembly error of the optical lens 91 will be enlarged. In order to reduce the assembly error of the optical lens 91, it is necessary to ensure that the error of the lens sleeve 90 at the time of fabrication is sufficiently small to avoid excessive assembly error of the optical lens 91. However, since the manufacturing process of the optical lens 91 and the lens sleeve 90 and the precision of the mold are different, the lens sleeve 90 is generally made to have a higher tolerance than the optical lens 91. As a result, the assembly error of the existing lens module is too large, and the production yield is lowered.

In view of the above shortcomings, it is necessary to improve the structure of the lens module.

The purpose of this creation is to provide a lens module with high assembly accuracy and production yield without the need to change the lens sleeve process or structure.

In order to achieve the above object, the lens module of the present invention comprises a lens sleeve, and a first lens and a second lens are arranged in the lens sleeve from the object side to the image side in sequence; the first lens has a proximity optical axis. a first lens portion and a first positioning portion away from the optical axis, wherein the image side ring of the first positioning portion is provided with a first fitting structure, and the first fitting structure is integrally molded with the first lens portion; The lens has a second lens portion close to the optical axis and a second positioning portion away from the optical axis, wherein the object side ring of the second positioning portion is provided with a second fitting structure, and the second fitting structure and the second lens portion are The first molding structure and the second fitting structure are interlocked to each other to align the first lens and the second lens along the optical axis.

In another preferred embodiment, the first fitting structure is configured as an annular groove recessed toward the first lens, the annular groove has a bottom surface of a vertical optical axis and a sidewall of the parallel optical axis; and the second The fitting structure is provided as an outwardly projecting annular rib having a top surface of a vertical optical axis and an annular wall parallel to the optical axis.

In a preferred embodiment, the side wall is provided with a tapered first guiding surface; and the annular wall is provided with a tapered second guiding surface, when the second fitting structure is embedded in the first fitting In the structure, the optical axes of the first lens and the second lens can be automatically aligned by the cooperation of the first guiding surface and the second guiding surface.

The present invention is characterized in that the positioning portion and the fitting structure of each lens are integrally molded with the lens portion thereof, so that the positioning portion and the fitting structure have extremely high manufacturing precision, and are fitted to each other by the positioning portion and the fitting structure. The positioning enables the assembly of the lenses to have a high assembly accuracy of the optical element level and a production yield, thereby avoiding the problem that the positioning of the lens is deviated due to an excessive manufacturing error of the lens sleeve.

In order to explain in detail the technical content, structural features, goals and effects of the present invention, the following is a detailed description with reference to the drawings.

Referring to the second figure, a lens sleeve 10 is disposed in the lens module, and the first lens 20 and the second lens 30 are disposed in the lens sleeve 10 from the object side 11 to the image side 12, and The third lens 40.

The first lens 20 includes a first lens portion 21 close to the optical axis 13 and a first positioning portion 22 remote from the optical axis 13 . The first lens 20 is directly connected to the lens sleeve 10 by the first positioning portion 22 . A first fitting structure 23 is provided on the surface of the first positioning portion 22 on the image side 12, and the first fitting structure 23 is integrally molded with the first lens portion 21, and thus has the same optical property as the first lens portion 21. High precision of component grades and extremely low manufacturing tolerances.

The second lens 30 also includes a second lens portion 31 close to the optical axis 13 and a second positioning portion 32 remote from the optical axis 13. A second fitting structure 33 is provided on one side of the object side 11 of the second positioning portion 32. . The second fitting structure 33 is similar to the second lens portion 31 in the form of an integral mold, and has only a very low manufacturing error. The first fitting structure 23 and the second fitting structure 33 are mutually engaged and fixed, whereby the first lens 20 and the second lens 30 are fixed to each other and positioned on the same optical axis 13.

Since the first lens 20 and the second lens 30 are positioned by the first fitting structure 23 and the second fitting structure 33, the manufacturing error of the lens sleeve 10 does not affect the first lens 20 and An eccentricity error between the second lenses 30. The first fitting structure 23 and the second fitting structure 33 are integrally molded with the first and second lens portions 31, respectively, so that the manufacturing error is extremely small, and the eccentricity error between the first lens 20 and the second lens 30 can be reduced. .

Further, a third fitting structure 38 and a fourth fitting structure 41 are provided on the surface of the second lens 30 on the image side 12 and the surface of the object side 11 of the third lens 40, respectively. Similarly, the second lens 30 and the third lens 40 are fixed by the mutual engagement of the third fitting structure 38 and the fourth fitting structure 41. Moreover, the third fitting structure 38 and the fourth fitting structure 41 are integrally molded with the second lens 30 and the third lens 40, respectively, and the manufacturing error thereof can be reduced. However, since the number of lenses in the lens module is often changed according to actual needs, the lens module of the present invention is not limited by the three lenses.

Referring to the third and fourth figures, in this embodiment, the first fitting structure 23 is defined as an annular groove 24 recessed from the surface of the first positioning portion 22 toward the inside of the lens, the annular groove 24 having a perpendicular to The bottom surface 25 of the optical axis 13 and the side wall 26 parallel to the optical axis 13 are provided with a tapered first guiding surface 27 on the side wall 26. The second fitting structure 33 is an outwardly projecting annular rib 34 which also has a top surface 35 perpendicular to the optical axis 13 and an annular wall 36 parallel to the optical axis 13 on the annular wall 36. A tapered second guiding surface 37 is also provided.

Therefore, when the second fitting structure 33 is embedded in the first fitting structure 23, the light of the first lens 20 and the second lens 30 is made by the guiding engagement of the first guiding surface 27 and the second guiding surface 37. The shaft 13 is capable of automatically correcting alignment and improving assembly efficiency. When the first fitting structure 23 and the second fitting structure 33 are completely engaged and positioned, the bottom surface 25 and the side wall 26 of the annular groove 24 of the first fitting structure 23 respectively abut the annular rib 34 of the second fitting structure 33. The top surface 35 is with the annular wall 36. Thereby, the first positioning portion 22 and the second positioning portion 32 will abut each other, and in addition to ensuring that the optical axes 13 of the first lens 20 and the second lens 30 are aligned with each other, the first lens 20 and the second lens are further ensured. 30 can maintain a preset distance.

In summary, the positioning portion 22 of each lens 20, 30 in the present creation, 32 and the fitting structures 32, 33 are integrally molded with their lens portions 21, 31, so that the positioning portions 22, 32 and the fitting structures 32, 33 have extremely high manufacturing precision, and are positioned by the positioning portions 32, 33 and The merging structures 32 and 33 are fitted and positioned to each other, so that when the lenses 20 and 30 are assembled, the assembly accuracy of the optical element level and the production yield are high, so that the lenses 20 and 30 are prevented from being excessively caused by the manufacturing error of the lens sleeve 10. The positioning of the problem creates a problem of deviation.

10‧‧‧ lens sleeve

11‧‧‧ object side

12‧‧‧ image side

13‧‧‧ optical axis

20‧‧‧ first lens

21‧‧‧First lens section

22‧‧‧First Positioning Department

23‧‧‧First chimeric structure

24‧‧‧ring groove

25‧‧‧ bottom

26‧‧‧ side wall

27‧‧‧First guiding surface

30‧‧‧second lens

31‧‧‧Second lens section

32‧‧‧Second Positioning Department

33‧‧‧Second chimeric structure

34‧‧‧Ring ribs

35‧‧‧ top surface

36‧‧‧Circular wall

37‧‧‧Second guiding surface

38‧‧‧ third chimeric structure

40‧‧‧ third lens

41‧‧‧Fourth chimeric structure

90‧‧‧ lens sleeve

91‧‧‧ optical lens

92‧‧‧Lens Department

93‧‧‧ Positioning Department

94‧‧‧ optical axis

The first figure is a cross-sectional view of a lens module.

The second drawing is a cross-sectional view of an embodiment of the present creation.

The third figure is a schematic diagram in which the first lens and the second lens are not yet fitted.

The fourth figure is a combination diagram of the first lens and the second lens of the present invention.

10‧‧‧ lens sleeve

11‧‧‧ object side

12‧‧‧ image side

13‧‧‧ optical axis

20‧‧‧ first lens

21‧‧‧First lens section

22‧‧‧First Positioning Department

23‧‧‧First chimeric structure

30‧‧‧second lens

31‧‧‧Second lens section

32‧‧‧Second Positioning Department

33‧‧‧Second chimeric structure

38‧‧‧ third chimeric structure

40‧‧‧ third lens

41‧‧‧Fourth chimeric structure

Claims (6)

A lens module is provided with an optical axis, an object side extending at one end of the optical axis and an image side opposite to the object side, comprising: a lens sleeve arranged in sequence from the object side to the image side in the lens sleeve a first lens and a second lens; the first lens has a first lens portion close to the optical axis and a first positioning portion away from the optical axis, wherein the image side ring of the first positioning portion is provided with a first fitting structure, And the first fitting structure is integrally molded with the first lens portion; the second lens has a second lens portion close to the optical axis and a second positioning portion away from the optical axis, wherein the object side ring of the second positioning portion is provided a second fitting structure, and the second fitting structure and the second lens portion are integrally molded; wherein the first fitting structure and the second fitting structure are interlocked to each other, so that the first lens and the second lens are along the light Axis alignment. The lens module of claim 1, wherein the first fitting structure is an annular groove recessed toward the first lens, the annular groove having a bottom surface of a vertical optical axis and a parallel optical axis And the second fitting structure is configured as an outwardly projecting annular rib having a top surface of a vertical optical axis and an annular wall parallel to the optical axis. The lens module of claim 2, wherein the side wall is provided with a tapered first guiding surface; and the annular wall is provided with a tapered second guiding surface. A lens module is provided with an optical axis, an object side extending at one end of the optical axis and an image side opposite to the object side, comprising: a lens sleeve arranged in sequence from the object side to the image side in the lens sleeve Providing a first lens and a second lens; the first lens is provided with a first lens portion and integrally formed to extend through the first lens a first fitting structure around the image side of the mirror portion; a second lens received in the lens sleeve, a second lens portion and a second fitting structure integrally formed around the object side of the second lens portion; The first fitting structure and the second fitting structure are interlocked to each other to align the first lens and the second lens along the optical axis. The lens module of claim 4, wherein the first fitting structure is an annular groove having a bottom surface of a vertical optical axis and a side wall parallel to the optical axis; the second fitting structure Is an annular rib having a top surface of a vertical optical axis and an annular wall parallel to the optical axis. The lens module of claim 5, wherein the side wall is provided with a tapered first guiding surface; and the annular wall is provided with a tapered second guiding surface.