TWI395987B - Lens module - Google Patents

Description

Lens module

The present invention relates to the field of optical systems, and in particular to a lens barrel and a lens module having the lens barrel.

With the development of multi-functional electronic products, lens modules are widely used in consumer electronic products such as mobile phones, notebook computers, digital cameras, and personal digital assistants. At the same time, people pursue multi-functionality, and also hope that electronic products have excellent image effects, that is, lens modules are required to have high-quality imaging quality.

As shown in FIG. 5, a lens module 200 of the prior art includes a lens barrel 22, and a glass lens 21, a first plastic lens 23, a second plastic lens 25, a filter 27, and a spacer disposed in the lens barrel 22. Body 24 and 26. The plurality of optical components in the lens module 200 are generally mounted along the axial direction of the lens barrel 22 to achieve design optical performance to achieve a predetermined imaging quality.

Since the glass lens 21 has only the side surface in contact with and fixed to the inner wall of the lens barrel 22, it is usually necessary to vertically fit the lens barrel 22. However, as shown in FIG. 6, the glass lens 21 is prone to tilt during assembly, thereby affecting the imaging quality of the lens module 200, resulting in poor assembly of the lens module 200 and being discarded. This not only reduces the assembly yield of the lens module, but also greatly increases the manufacturing cost of the lens module.

In view of the above, it is necessary to provide a lens barrel that can stably assemble a lens, particularly a glass lens, and a lens module having the lens barrel.

a lens barrel having a support portion extending radially inward from an inner wall of the lens barrel The stepped ring body has a first supporting surface and a second supporting surface, the first supporting surface is for cooperating with the side surface of the lens to be assembled, and the second supporting surface is for mating with the bottom surface of the lens to be assembled.

A lens module includes a lens barrel and a lens, the lens has a lens side and a lens bottom surface, wherein the lens barrel has a support portion extending radially inward from the inner wall of the lens barrel a stepped ring body having an intersecting first support surface and a second support surface, wherein the lens is placed on the support portion, the first support surface is in mating contact with the lens side surface, and the second support surface is mated with the lens bottom surface contact.

The lens barrel of the technical solution and the lens module having the same have the following advantages: since the support portion can stably support the bottom surface and the side surface of the lens to be assembled, the lens to be assembled can be conveniently assembled into the lens barrel to improve the lens module. Assembly efficiency; and the support portion effectively prevents the tilting assembly phenomenon of the lens, ensures the imaging quality of the lens module, improves the assembly yield of the lens module, and reduces the manufacturing cost of the lens module.

100‧‧‧ lens module

11‧‧‧Ontology

112‧‧‧ Mirror inner wall

12‧‧‧Support

13‧‧‧First Holding Department

131‧‧‧First top surface

133‧‧‧First inner wall

140‧‧‧Second through hole

142‧‧‧second bottom surface

20‧‧‧glass lenses

202‧‧‧ lens underside

30‧‧‧ first lens

50‧‧‧second lens

70‧‧‧Filter

10‧‧‧Mirror tube

110‧‧‧ receiving holes

111‧‧‧The outer wall of the lens barrel

120‧‧‧second-order through hole

130‧‧‧First through hole

132‧‧‧ first bottom surface

14‧‧‧Second Holding Department

141‧‧‧Second top

143‧‧‧Second inner wall

201‧‧‧Top surface of the lens

203‧‧‧ lens side

40‧‧‧First spacer

60‧‧‧Second spacer

FIG. 1 is an exploded perspective view of a lens module provided by an embodiment of the present technical solution.

2 is a cross-sectional view of the lens barrel according to the embodiment of the present technical solution taken along the line II-II of FIG. 1.

FIG. 3 is a schematic diagram of assembly of a lens module provided by an embodiment of the present technical solution.

4 is a cross-sectional view of the lens module according to the embodiment of the present technical solution taken along line IV-IV of FIG. 3.

Figure 5 is a cross-sectional view of a prior art lens module.

Figure 6 is a cross-sectional view of the prior art lens module glass lens when it is tilted.

The embodiments of the present technical solution will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a lens module 100 according to an embodiment of the present invention includes a lens barrel 10 , a glass lens 20 , and a plurality of optical components. In this embodiment, the plurality of optical elements include a first lens 30, a first spacer 40, a second lens 50, a second spacer 60, and a filter 70. The first lens 30 and the second lens 50 may be glass lenses or plastic lenses. The first spacer 40 is used to maintain the distance between the first lens 30 and the second lens 50, and the second spacer 60 is used to maintain the distance between the second lens 50 and the filter 70.

The glass lens 20 has a lens top surface 201, a lens bottom surface 202, and a lens side surface 203. The lens bottom surface 202 is a surface close to the image side of the lens module 100 when assembled, and the lens top surface 201 is a surface close to the object side of the lens module 100 when assembled. The lens top surface 201 is opposite to the lens bottom surface 202 and is The side faces 203 of the lenses are connected. The shape of the lens top surface 201, the lens bottom surface 202, and the lens side surface 203 is related to the specific structure of the glass lens 20. The side surface 203 of the lens is a torus, and its cross-sectional shape may be a rectangle, a circle, an ellipse or the like. The lens top surface 201 and the lens bottom surface 202 may be planar, concave, convex, and the like. In this embodiment, the side surface 203 of the lens is a circular surface having a circular cross section, and the bottom surface 202 of the lens is a flat surface. It is noted that the diameter of the glass lens 20 is D ₁ .

Referring to FIG. 2 , the lens barrel 10 includes a body 11 and a support portion 12 . The body 11 is a cylindrical body having a receiving hole 110 for receiving a plurality of optical elements such as the first lens 30, the first spacer 40, the second lens 50, the second spacer 60, and the filter 70. The body 10 of the lens barrel 10 has an opposite inner wall 112 of the lens barrel and an outer wall 111 of the lens barrel. The barrel outer wall 111 may be provided with a thread (not shown) for assembly with a barrel holder (not shown). The support portion 12 is a stepped ring body disposed on one end of the lens barrel inner wall 112 near the object side of the lens module 100 for stably supporting the glass lens 20.

Specifically, the support portion 12 may include a first holding portion 13 and a second holding portion 14 that are connected.

The first holding portion 13 is integrally formed with the main body 11 of the lens barrel 10 and is a ring body having a first through hole 130 extending radially inward from the inner wall 112 of the lens barrel. The diameter of the first through hole 130 is D ₂ , which should correspond to the diameter D _{1 of the} glass lens 20 such that the first through hole 130 can accommodate the glass lens 20 . Specifically, D ₂ should be equal to D ₁ or greater than D _{1 by} 0 to 0.5 mm. It is noted that the height of the first holding portion 13 is H ₁ .

The first holding portion 13 has a first top surface 131 , a first bottom surface 132 , and a first inner wall 133 . The first top surface 131 is opposite to the first bottom surface 132. The first inner wall 133 is opposite to the inner wall 112 of the lens barrel. The shape of the first inner wall 133 cooperates with the shape of the side 203 of the lens for supporting the side 203 of the lens of the glass lens 20.

The second holding portion 14 is integrally formed with the first holding portion 13 and is an annular body having a second through hole 140 extending radially inward from the first inner wall 133. It is noted that the diameter of the second through hole 130 is D ₃ , and D ₃ depends on the optical path of the lens module 100. In general, D ₃ should be 0.5-5 mm smaller than D ₂ . The second through hole 140 communicates with the first through hole 130 to form a second-order through hole 120. The second-order through hole 120 communicates with the receiving hole 110 of the lens barrel 10 to allow light to pass therethrough. It is noted that the height of the second holding portion 14 is H ₂ and H _{2 is} smaller than H ₁ .

The second holding portion 14 has a second top surface 141, a second bottom surface 142, and a second inner wall 143. The second top surface 141 is opposite to the second bottom surface 142 and intersects the first inner wall 133. The second top surface 141 cooperates with the lens bottom surface 202, the shape of which depends on the shape of the lens bottom surface 202. In this embodiment, the bottom surface 202 of the lens is a flat surface, so the second top surface 141 is also a flat surface. The second inner wall 143 connects the second top surface 141 and the second bottom surface 142 and is opposite to the first inner wall 133.

In this embodiment, the first bottom surface 132 and the second bottom surface 142 are coplanar. Since the height H _{2 of the} second holding portion 14 is smaller than the height H _{1 of the} first holding portion 13 , the first top surface 131 and the second top surface The 141 is not coplanar, and thus the first holding portion 13 and the second holding portion 14 together form a support portion 12 of a stepped ring body. Of course, the first bottom surface 132 and the second bottom surface 142 may not be coplanar.

In the support portion 12, the first inner wall 133 of the first holding portion 13 is a first supporting surface for supporting the side surface 203 of the glass lens 20, and the second top surface 141 of the second holding portion 14 is for supporting the bottom surface of the glass lens 20. a second support surface of 202, whereby the glass lens 20 can be easily placed and fixed to the support portion 12 The optical axis of the glass lens 20 can be effectively kept in line with the axis of the lens barrel 10 to prevent the tilting of the glass lens 20.

Of course, the first holding portion 13 and the second holding portion 14 may be separately formed, and then fixed to the support portion 12 by screws, adhesives, or the like. The support portion 12 and the body 11 can also be separately formed, and the support portion 12 is fixed to the lens barrel inner wall 112 of the body 11 to form the lens barrel 10.

The material of the support portion 12 may be a resin. Of course, other metal materials, inorganic non-metal materials, and the like may also be used. The material of the body 11 is typically a resin.

In this embodiment, the first holding portion 13, the second holding portion 14, and the body 11 are all resin, so that the lens barrel 10 can be integrally formed.

When the lens module 100 is assembled, the glass lens 20 may be assembled to the support portion 12 of the lens barrel 10, or the first lens 13, the first spacer 14, the second lens 14, and the second spacer 15 may be firstly A plurality of optical elements such as the filter 16 are assembled in the lens barrel 10.

In this embodiment, first, the glass lens 20 is placed on the support portion 12 such that the lens side surface 203 is in contact with the first support surface, and the lens bottom surface 202 is in contact with the second support surface, thereby assembling the glass lens 20 to the lens barrel 10. . Specifically, the glue can be dispensed on the support portion 12, specifically, the second top surface 141 of the second holding portion 14 and the first inner wall 133 of the first holding portion 13; 20 is placed on the support portion 12 such that the lens bottom surface 202 is in contact with the second top surface 141 by glue, and the lens side surface 203 is contacted with the first inner wall 133 by glue; then, the lens bottom surface 202 is fixed to the second surface by curing glue. The top surface 141 and the lens side surface 203 are fixed to the first inner wall 133, thereby completing the assembly of the glass lens 20. Next, the inner wall 112 of the lens barrel is dispensed, and optical elements such as the first lens 30, the first spacer 40, the second lens 50, the second spacer 60, and the filter 70 are sequentially assembled in the lens barrel 10, and The glue is cured to fix the optical elements in the lens barrel 10. Thereby, the lens module 100 is assembled to form as shown in FIGS. 3 and 4.

In this embodiment, the glass-based lens assembled to the support portion 12 of the lens barrel 10 can be assembled with the plastic lens or other material lens according to the actual assembly requirements, thereby avoiding the tilting assembly of the lens. occur.

The lens barrel of the technical solution and the lens module having the same have the following advantages: since the support portion can stably support the bottom surface and the side surface of the lens to be assembled, the lens to be assembled can be conveniently assembled into the lens barrel to improve the lens module. Assembly efficiency; and the support portion effectively prevents the tilting assembly phenomenon of the lens, ensures the imaging quality of the lens module, improves the assembly yield of the lens module, and reduces the manufacturing cost of the lens module.

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 a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ lens module

112‧‧‧ Mirror inner wall

12‧‧‧Support

14‧‧‧Second Holding Department

30‧‧‧ first lens

50‧‧‧second lens

70‧‧‧Filter

10‧‧‧Mirror tube

11‧‧‧Ontology

13‧‧‧First Holding Department

20‧‧‧glass lenses

40‧‧‧First spacer

60‧‧‧Second spacer

Claims (2)

A lens module includes a lens barrel, a glass lens and a plurality of optical elements, wherein the glass lens has a lens side surface and a lens bottom surface, wherein the lens barrel has a support portion, and the support portion is from the lens barrel a stepped ring body extending radially inwardly of the wall, the support portion having a first supporting surface and a second supporting surface intersecting, the supporting portion comprising a first holding portion and a second holding portion connected, the first The holding portion is an annular body extending radially inward from the inner wall of the lens barrel, and has a first through hole, and the second holding portion is an annular body extending radially inward from the inner wall of the first holding portion, and has a second shape a through hole, the diameter of the first through hole is larger than a diameter of the second through hole by 0.5 mm to 5 mm, the first through hole is in communication with the second through hole, and the glass lens is placed on the support portion, the glass lens The side surface of the glass lens is mated with the first supporting surface by the glue, and the bottom surface of the glass lens is mated with the second supporting surface by the glue, the plurality of optical elements including the first lens, the first spacer, and the second lens, the first interval The body is disposed between the first lens and the second mirror For maintaining the distance between the first lens and the second lens. The lens module of claim 1, wherein the size of the support portion corresponds to a size of the lens.