TWI446050B - Lens and lens module having the same - Google Patents

Description

Lens and lens module

The invention relates to a lens and a lens module, which can be applied to the field of systems such as cameras and cameras.

With the development of multimedia technology, camera systems such as digital cameras and video cameras are increasingly favored by consumers. In the existing camera system, such as a mobile phone digital camera, the lens module generally comprises a lens barrel and a plurality of lenses housed in the lens barrel. In the lens assembly process, the lenses are usually fitted in two phases to ensure concentricity.

As shown in FIG. 1 , a common lens module includes a lens barrel 30 , and a first lens 31 , a second lens 32 , and a spacer 33 housed in the lens barrel 30 . The edge of the first lens 31 extends in the optical axis direction thereof with an annular protrusion 310 which is in close contact with the inner wall of the lens barrel 30 and encloses a receiving space for receiving the second lens 32 therein. The spacer 33 is disposed between the first lens 31 and the second lens 32.

In the assembly process of the lens module, the second lens 32 is first inserted into the receiving space of the first lens 31 to fit the first and second lenses 31 and 32, and then the first and second lenses are assembled. The second lenses 31, 32 are collectively incorporated into the lens barrel 30. However, since the annular projection 310 is formed by the edge of the first lens 31 extending in the optical axis direction thereof, when the first lens 31 is assembled into the lens barrel 30, the annular projection 310 and the lens barrel 30 are formed. The side walls are in contact to generate a force. Therefore, the roundness and size of the lens barrel 30 will squeeze the annular protrusion 310, and the annular protrusion 310 will be deformed, and the annular protrusion 310 will further Squeezing the second lens 32 causes the second lens 32 to shift due to the force and thereby affect the concentricity.

In view of the above, it is necessary to provide a lens which can ensure a high degree of concentricity with the lens fitted thereto during the assembly into the lens barrel.

In the following, a lens will be described with respect to a specific embodiment to ensure a high degree of concentricity with the lens to which it is fitted during assembly into the lens barrel.

A lens comprising an optical region for performing an optical function and an annular mechanism region connected to the optical region and surrounding the optical region, the annular surface of the annular mechanism region being provided with a ring extending along the optical axis of the lens a ring-shaped protrusion distributed around the optical axis of the lens and enclosing a receiving space, wherein the contact surface of the annular protrusion and the annular mechanism region is located within the annular surface of the annular mechanism region and is spaced apart from the edge of the annular surface spacing.

Compared with the prior art, the contact surface of the annular protrusion of the lens and the annular mechanism region is located within the annular surface of the annular mechanism region and spaced apart from the edge of the annular surface, so that the lens is assembled into the lens barrel The inner wall of the lens barrel is in contact with the edge of the annular mechanism region to maintain the above-mentioned distance from the annular projection, so that the annular projection can be prevented from being deformed by the force of the inner wall of the lens barrel, and can be fitted thereto. The lens guarantees a high degree of concentricity.

10,22‧‧‧ lens

11‧‧‧Optical area

12‧‧‧ institutional area

121‧‧‧First torus

122‧‧‧second torus

123‧‧‧ side

124,310‧‧‧ annular protrusion

126‧‧‧ accommodating space

20‧‧‧Lens module

21,30‧‧‧Mirror tube

210‧‧‧Cylinder

212‧‧‧ lens barrel front end

23,33‧‧‧ spacer gasket

31‧‧‧ first lens

32‧‧‧second lens

FIG. 1 is a schematic structural view of a conventional lens module.

2 is a schematic view showing the structure of a lens according to a first embodiment of the present invention.

3 is a schematic structural view of a lens module according to a second embodiment of the present invention.

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

Referring to FIG. 2, a lens 10 according to a first embodiment of the present invention includes an optical region 11 and a mechanism region 12.

The optical zone 11 is used for light to pass through to achieve the optical function of the lens 10, such as a convergence function or a diverging function.

This mechanism region 12 is used to support the optical zone 11. The mechanism region 12 is an annular region that is distributed around the optical region 11. The mechanism region 12 includes a first annulus 121, a second annulus 122, and a side surface 123. The first annular surface 121 is opposite to the second annular surface 122. The side surface 123 is in contact with the edges of the first annular surface 121 and the second annular surface 122 and is located between the first annular surface 121 and the second annular surface 122. In this embodiment, the mechanism region 12 is annular.

The first annular surface 121 is provided with an annular protrusion 124 extending in the direction of the optical axis of the lens 10 (indicated by a chain line in the figure). The annular protrusion 124 encloses a receiving space 126. The annular protrusion 124 is in contact with the first annular surface 121, and the contact faces of the two are in the first annular surface 121 and are not in contact with the edge of the first annular surface 121, that is, separated from the edge of the first annular surface 121. The spacing is such that it does not interface with the side 123. In this embodiment, the annular protrusion 124 is continuously distributed around the optical axis of the lens 10 to form a cylinder. The inner diameter r1 of the cylinder is larger than the inner diameter R1 of the annular mechanism region, and the outer diameter of the cylindrical protrusion R2 is smaller than the outer diameter R2 of the annular mechanism region.

Referring to FIG. 3, a second embodiment of the present invention further provides a lens module 20 having a lens 10. The lens module 20 includes a lens barrel 21, a lens 10, and a lens 22.

The lens barrel 21 includes a cylinder 210 and a barrel front end 212 at one end of the cylinder 210.

The lens 10 is housed inside the cylinder 210 of the lens barrel 21, and the second annular surface 122 of the lens 10 faces the front end 212 of the lens barrel. The side surface 123 of the lens 10 is in contact with the inner wall of the lens barrel 21, and the inner wall of the lens barrel 21 is spaced apart from the annular projection 124 of the lens 10 by a certain distance d.

The lens 22 is housed in a housing space 126 surrounded by the annular projection 124. Preferably, a spacer 23 is further disposed between the lens 22 and the lens 10.

In the lens 10 provided in this embodiment, in the process of being assembled into the lens barrel 20, the inner wall of the lens barrel 20 is in contact with the side surface 123 of the edge of the first annular surface 121, and is kept at a certain distance d from the annular protrusion 124. Therefore, the annular projection 124 can be prevented from being deformed by the force of the inner wall of the lens barrel 20, so that the lens 22 is not pressed, so that a high concentricity can be ensured with the lens fitted thereto.

In addition, the annular protrusions 124 shown in FIGS. 2 and 3 are continuously distributed around the optical axis of the lens 10 on the first annular surface 121. Of course, the annular protrusions 124 can also be discretely distributed around the optical axis of the lens 10. The protrusions are provided so that the discretely distributed protrusions can hold the lens 22 to ensure that the lens 10 is concentric with the lens 22.

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.

10‧‧‧ lens

11‧‧‧Optical area

12‧‧‧ institutional area

121‧‧‧First torus

122‧‧‧second torus

123‧‧‧ side

124‧‧‧ annular protrusion

126‧‧‧ accommodating space

Claims (8)

A lens comprising an optical region for performing an optical function and an annular mechanism region connected to the optical region and surrounding the optical region, the improvement being that the annular surface of the annular mechanism region is disposed along an optical axis of the lens An annular protrusion extending in a direction, the annular protrusion is distributed around the optical axis of the lens and encloses a receiving space, and the contact surface of the annular protrusion and the annular mechanism region is located in the annular surface of the annular mechanism region and is opposite to the torus The edges are spaced apart by a certain distance, and the inner diameter of the annular projection is constant along the optical axis direction. The lens of claim 1, wherein the annular mechanism region is annular. The lens of claim 2, wherein the annular protrusion encloses a cylinder having an inner diameter larger than an inner diameter of the annular mechanism region, the outer diameter of the cylindrical protrusion being smaller than the ring The outer diameter of the area of the mechanism. The lens of claim 1, wherein the annular protrusion is discretely distributed around the optical axis of the lens. A lens module includes a first lens, a second lens and a lens barrel, wherein: the first lens includes an optical region for performing an optical function and a ring connected to the optical region and surrounding the optical region a ring-shaped protrusion extending along the optical axis of the lens is disposed on the annular surface of the ring-shaped mechanism region, and the annular protrusion is distributed around the optical axis of the lens and encloses a receiving space, the annular protrusion and the ring-shaped ring The contact surface of the mechanism region is located within the annular surface of the annular mechanism region and spaced apart from the edge of the annular surface, and the inner diameter of the annular protrusion is constant along the optical axis direction: the second lens is received in the first lens The housing is surrounded by the annular projection; the lens barrel houses the first lens and the second lens. The lens module of claim 5, wherein the annular mechanism region is annular . The lens module of claim 5, wherein the annular protrusion encloses a cylinder having an inner diameter larger than an inner diameter of the annular mechanism region, the outer diameter of the cylindrical protrusion being smaller than The outer diameter of the annular mechanism region. The lens module of claim 5, wherein the annular protrusion is discretely distributed around the optical axis of the lens.