TWI385428B - Lens module - Google Patents

Description

Lens module

The invention relates to a lens module, in particular to a focus lens module.

With the development of multimedia technology, digital cameras and video cameras are becoming more and more popular among consumers. While people are pursuing miniaturization of digital cameras and cameras, they hope to capture images with different distances at the same location and obtain clear images. The image camera, and the digital camera module applied to the mobile phone also needs to meet the requirements of lightness and thinness, so the focus camera came into being.

In the focusing process of a conventional camera, it is often necessary to adjust the distance between the lens module and the image sensing device. In this process, the total axial length of the lens module needs to be changed or the lens module is along the light. The axis moves, so you must set a space in the lens mount that allows the lens module to move back and forth, thus increasing the overall camera volume.

In view of this, it is necessary to provide a lens module that can maintain the total length and position of the lens module during focusing.

A lens module includes a first lens barrel, a second lens barrel, and a third lens barrel that are sequentially disposed along an optical axis direction. The second lens barrel is provided with a lens and has internal threads at both ends, and the first lens barrel and the third lens barrel have external threads that can be engaged with the internal thread. An engaging portion is axially extended from one end of the first lens barrel and the third lens barrel, and the engaging portion has a protrusion extending in a radial direction of the lens barrel, and the second portion The inner end of the lens barrel has a groove at the inner end of the lens barrel, so that the engaging portion of the first lens barrel and the third lens barrel can be inserted into the second lens barrel and can be rotated in the second lens barrel.

A lens module includes a first lens barrel, a second lens barrel, and a third lens barrel that are sequentially disposed along an optical axis direction. The second lens barrel is provided with a lens and has external threads at both ends. The first lens barrel and the third lens barrel each have an internal thread that can be engaged with the external thread. An engaging portion having a protrusion extending in a radial direction of the lens barrel is axially extended at both ends of the second lens barrel, and the first lens barrel and the third lens barrel have a groove at the internal thread, so that the second The engaging portions at both ends of the lens barrel can be inserted into the first lens barrel and the third lens barrel and can be rotated in the first lens barrel and the third lens barrel.

A lens module includes a first lens barrel, a second lens barrel, and a third lens barrel that are sequentially disposed along an optical axis direction. The second lens barrel is provided with a lens and two ends are respectively provided with internal threads and external threads, and the first lens barrel and the third lens barrel respectively have internal threads and external threads on the second lens barrel. Fit the external and internal threads. The first lens barrel is adjacent to one end of the second lens barrel and the second lens barrel is adjacent to one end of the third lens barrel, and an engaging portion having a protrusion extending in a radial direction of the lens barrel is axially extended. The second a groove is formed in the inner thread of the lens barrel and the third lens barrel, so that the engaging portions of the first lens barrel and the second lens barrel can be respectively inserted into the second lens barrel and the third lens barrel, and can be inserted in the second lens barrel and the second lens barrel Rotate inside the three barrels.

The lens module can fix the first lens barrel and the third lens barrel, and only adjust the lens module by rotating the second lens barrel, thereby ensuring the total length of the entire lens module during the focusing process. The position is unchanged, and there is no need to set a space for the lens module to move back and forth in the lens mount, thereby reducing the size of the camera. In addition, the protrusion on the engaging portion of the lens module can prevent the second lens barrel from rotating excessively out of the first lens barrel or the third lens barrel during the zooming process.

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

Referring to FIG. 1 and FIG. 2 , the lens module 100 according to the first embodiment of the present invention includes a first lens barrel 10 , a second lens barrel 20 , and a third lens barrel 30 . The second barrel 20 is disposed between the first barrel 10 and the third barrel 30.

The first barrel 10 has an external thread portion 11 and an engaging portion 12 extending from the external thread portion 11 toward the second barrel 20. The external thread portion 11 has an external thread, and the engaging portion 12 has a protrusion 121 extending radially along the first barrel 10. It can be understood that the protrusions 121 can also be plural.

The third barrel 30 has an external thread portion 31 and an engaging portion 32 extending from the external thread portion 31 toward the second barrel 20. The external thread portion 31 has an external thread, and the engaging portion 32 has a protrusion 321 extending radially along the third barrel 30.

The two ends of the second barrel 20 are respectively provided with internal thread portions 21 and 22 for respectively engaging with the external thread portion 11 of the first barrel 10 and the external thread portion 31 of the third barrel 30. The internal thread portions 21 and 22 have internal threads, and the inner diameters thereof are respectively larger than the outer diameters of the engaging portions 12 and 32. The inner threaded portions 21 and 22 of the second lens barrel 20 respectively have an axially extending groove 23 through which the protrusion 121 and the protrusion 321 can be inserted when the lens module 100 is assembled. Inside the lens barrel 20. At least one lens 24 is disposed in the second lens barrel 20, so that the lens module 100 has a zoom function, and at least one of the first lens barrel 10 and the third lens barrel 30 is provided with a lens. A lens 13 and a lens 33 are respectively disposed in the first barrel 10 and the third barrel 30.

An inner diameter of the second lens barrel 20 adjacent to the first lens barrel 10 is greater than a sum of an outer diameter of the engaging portion 12 of the first lens barrel 10 and the height of the protrusion 121, so that the engaging portion 12 can be The second barrel 20 rotates inside. The inner diameter of the side of the second barrel 20 near the third barrel 30 is greater than the sum of the outer diameter of the engaging portion 32 of the third barrel 30 and the height of the protrusion 321 so that the engaging portion 32 can be The second barrel 20 rotates inside. The protrusions 121 and the protrusions 321 can prevent the second lens barrel from rotating excessively away from the first lens barrel 10 or the third lens barrel 30 when the lens module 100 is adjusted. The sum of the outer diameter of the engaging portion 12 and the height of the protrusion 121 should be larger than the inner diameter of the threaded portion 21 of the second barrel 20, and the sum of the outer diameter of the engaging portion 32 and the height of the protrusion 321 should be greater than The inner diameter of the threaded portion 22 of the second barrel 20. In order to enable the protrusion 121 of the engaging portion 12 to be inserted into the second barrel 20 and to be rotatable, the distance between the protrusion 121 and the external thread portion 11 of the first barrel 10 should be greater than that of the second barrel 20. The length of the internal thread portion 21. In order to enable the protrusion 321 of the engaging portion 32 to be inserted into the second barrel 20 and to be rotatable, the distance between the protrusion 321 and the external thread portion 31 of the third barrel 30 should be greater than that of the second barrel 20. The length of the internal thread portion 22.

A person skilled in the art can understand that the lens module 100 can have other corresponding changes and modifications according to the technical idea of the present invention.

Referring to FIG. 3 , the lens module 200 provided by the second embodiment of the present invention has a structure similar to that of the lens module 100 provided by the first embodiment of the present invention, and the difference is that The two ends of the second lens barrel 220 are provided with a male threaded portion 221 and an engaging portion 222, and the first lens barrel 210 and the third lens barrel 230 have an internal thread portion 231 and a recess 232, and the engaging portion 222 and the card The joint 12 has the same structure.

Referring to FIG. 4 , the lens module 300 provided by the third embodiment of the present invention has a structure similar to that of the lens module 100 provided by the first embodiment of the present invention, and the difference is that The second lens barrel 320 is provided with an external thread portion 322 and an engaging portion 323 near the end of the third lens barrel 330, and an internal thread portion 324 and a groove 325 are disposed near one end of the first lens barrel 310. The third lens barrel is provided. The 330 has an internal thread portion 331 and a recess 332. The first barrel 310 has an external thread portion 311 and an engaging portion 312. The engaging portions 323 and 312 have the same structure as the engaging portion 12.

The lens module can fix the first lens barrel and the third lens barrel, and only adjust the lens module by rotating the second lens barrel, thereby ensuring the total length of the entire lens module during the focusing process. The position is unchanged, and there is no need to set a space for the lens module to move back and forth in the lens mount, thereby reducing the size of the camera. In addition, the protrusion on the engaging portion of the lens module can prevent the second lens barrel from rotating excessively out of the first lens barrel or the third lens barrel during the zooming process.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application.

Lens module. . . 100,200,300

The first lens barrel. . . 10,210,310

External thread. . . 11,31,221,311,322

Engagement department. . . 12,32,222,312,323

lens. . . 13,24,33

The second lens barrel. . . 20,220,320

Internal thread section. . . 21,22,231,324,331

Groove. . . 23,232,325,332

The third barrel. . . 30,230,330

Raised. . . 121,321

1 is a schematic exploded view of a lens module according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view of the assembled lens module according to the first embodiment of the present invention; FIG. 3 is a second embodiment of the present invention. FIG. 4 is a schematic exploded view of a lens module according to a third embodiment of the present invention; FIG.

Lens module. . . 100

The first lens barrel. . . 10

External thread. . . 11,31

Engagement department. . . 12,32

lens. . . 13,24,33

The second lens barrel. . . 20

Internal thread section. . . 21,22

The third barrel. . . 30

Raised. . . 121,321

Claims (14)

A lens module is improved in that it comprises a first lens barrel, a second lens barrel and a third lens barrel which are sequentially disposed along the optical axis direction, wherein the second lens barrel is provided with a lens and both ends have internal threads, The first lens barrel and the third lens barrel respectively have external threads that can be engaged with the internal thread, and the first lens barrel and the third lens barrel are respectively adjacent to one end of the second lens barrel and are axially extended with a snap. a portion having a protrusion extending in a radial direction of the lens barrel, wherein the second lens barrel has a groove at both ends of the lens barrel, so that the engaging portion of the first lens barrel and the third lens barrel can be inserted The second barrel is rotatable in the second barrel. The lens module of claim 1, wherein the first lens barrel is provided with a lens. The lens module of claim 1 or 2, wherein the lens barrel is provided in the third lens barrel. The lens module of claim 1, wherein the first lens barrel or the third lens barrel has a plurality of protrusions on the engaging portion. The lens module of claim 1, wherein the engaging portion of the first barrel and the third barrel has a plurality of protrusions. A lens module is improved in that it comprises a first lens barrel, a second lens barrel and a third lens barrel which are sequentially disposed along the optical axis direction, wherein the second lens barrel is provided with a lens and external threads at both ends, The first lens barrel and the third lens barrel are respectively provided with internal threads that can cooperate with the external thread, and both ends of the second lens barrel are axially extended with a card having a protrusion extending along the radial direction of the lens barrel. a portion of the first lens barrel and the third lens barrel having a groove so that the engaging portions at both ends of the second lens barrel can be inserted into the first lens barrel and the third lens barrel and can be in the first lens barrel Rotate inside the third barrel. The lens module of claim 6, wherein the first lens barrel or the third lens barrel is provided with a lens. The lens module of claim 6, wherein the first lens barrel and the third lens barrel are provided with lenses. The lens module of claim 6, wherein the engaging portion of the second lens barrel has a plurality of protrusions. A lens module is improved in that the first lens barrel, the second lens barrel and the third lens barrel are sequentially disposed along the optical axis direction, and the second lens barrel is provided with a lens and two ends are respectively provided with internal threads and The first lens barrel and the third lens barrel respectively have external and internal threads that can be engaged with the internal threads and the external threads on the second lens barrel, and the first lens barrel is adjacent to the second mirror One end of the barrel and one end of the second barrel adjacent to the third barrel are axially extended with an engaging portion having a protrusion extending radially along the barrel, and the second barrel and the third barrel are internally threaded There is a groove so that the engaging portions of the first barrel and the second barrel can be respectively inserted into the second barrel and the third barrel and can be rotated in the second barrel and the third barrel. The lens module of claim 10, wherein the first lens barrel or the third lens barrel is provided with a lens. The lens module of claim 10, wherein the first lens barrel and the third lens barrel are provided with lenses. The lens module of claim 10, wherein the first lens barrel or the second mirror has a plurality of protrusions on the engaging portion. The lens module of claim 10, wherein the engaging portion of the first barrel and the second mirror has a plurality of protrusions.