Lens module and electronic equipment

Abstract

For the lens module provided by the application, the first lens assembly, the second lens assembly and the third lens assembly are arranged at intervals in the optical axis direction in turn. The first driving assembly includes a first magnet and two second magnets, the magnetic pole of each magnet is polarized along the optical axis, the first magnet is arranged on the second lens assembly, the two second magnets are respectively placed on the opposite sides of the first magnet along the optical axis, and the first magnet and / or the two second magnets are electromagnets, The magnetic poles of the two second magnets close to the first magnet have the same magnetism. It can realize two magnification photographing modes with simple structure, which is conducive to reducing the economic cost. The application also provides an electronic equipment including a lens module.

Description

[Technical Field]

[0001] This work relates to a lens module, specifically to a lens module and an electronic device. [Previous Technology]

[0002] Conventional lens modules include fixed-magnification lens modules and continuous zoom lens modules. Fixed-magnification lens modules cannot meet the requirements of variable magnification, while continuous zoom lens modules, in addition to driving components, also need to include photoelectric sensors, photoelectric sensing blocks, position magnetic strips and magnetic strip support posts. The structure is relatively complex and the economic cost is relatively high. They are usually used in high-end electronic devices, such as mobile phones and cameras.

[0003] Therefore, it is necessary to provide a zoom lens module with a relatively simple structure to reduce the economic cost of the lens module, so that electronic devices with relatively low prices can also realize zoom function. [Summary of the Invention]

[0004] This invention provides a lens module to address the shortcomings of the background technology.

[0005] This invention also provides an electronic device including a lens module.

[0006] To achieve the above objective, this invention proposes a lens module, including a first lens assembly, a second lens assembly, and a third lens assembly. The first lens assembly, the second lens assembly, and the third lens assembly are arranged sequentially at intervals along the optical axis of the lens module. The lens module further includes a first driving assembly and a second driving assembly. The first driving assembly is used to drive the second lens assembly to move back and forth relative to the first lens assembly, and the second driving assembly is used to drive the third lens assembly to move back and forth relative to the second lens assembly. The first driving assembly includes a first magnet and two second magnets. The first magnet is disposed on the second lens assembly, and the two second magnets are respectively placed on opposite sides of the first magnet along the optical axis. The first magnet and / or the two second magnets are electromagnets. When polarized, the two second magnets have the same magnetism when they are close to the magnetic poles of the first magnet.

[0007] This invention also provides an electronic device, including the lens module.

[0008] Compared with the prior art, the first driving component of this invention includes a first magnet and two second magnets. The first magnet is disposed on the second lens assembly, and the two second magnets are respectively disposed on both sides of the first magnet. By setting the first magnet and / or the two second magnets as electromagnets, and by changing the magnetic poles of the first magnet and / or the two second magnets, the second lens assembly moves closer to or further away from the first lens assembly, thereby achieving the switching between two shooting modes. Furthermore, by driving the third lens assembly to move closer to or further away from the second lens assembly through the second driving component, focusing can be achieved. The lens module can achieve positioning and movement without the need for photoelectric sensors, photoelectric sensing blocks, position magnetic strips, and magnetic strip support posts, resulting in a simpler structure and reducing the economic cost of the lens module.

Implementation Method

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can exist in the central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may exist in the central component. When a component is said to be "set to" another component, it can be directly set on the other component or it may exist in the central component.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0016] In order to further explain the technical means and effects adopted by this invention to achieve the intended purpose, the following detailed description of this invention is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] Referring to Figures 1 and 2, this invention provides a lens module 100, which includes a first lens assembly 10, a second lens assembly 20, and a third lens assembly 30. The first lens assembly 10, the second lens assembly 20, and the third lens assembly 30 are arranged sequentially at intervals along the optical axis P of the lens module 100. Referring to Figure 1, the lens module 100 further includes a first driving assembly 40 and a second driving assembly (not shown in the figure). The first driving assembly 40 is used to drive the second lens assembly 20 to move back and forth relative to the first lens assembly 10, and the second driving assembly is used to drive the third lens assembly 30 to move back and forth relative to the second lens assembly 20. Referring to Figure 2, the first driving assembly 40 includes a first magnet 41 and two second magnets 42. The first magnet 41 is disposed on the second lens assembly 20, and the two second magnets 42 are respectively placed on opposite sides of the first magnet 41 along the optical axis direction P. The first magnet 41 and / or the two second magnets 42 are electromagnets. When polarized, the two second magnets 42 have the same magnetism when they are close to the magnetic poles of the first magnet 41.

[0018] In some embodiments, the two second magnets 42 are electromagnets, and the first magnet 41 is a permanent magnet. In this case, the working mechanism of the lens module 100 is as follows: when a first energizing direction is applied to the two second magnets 42, along the optical axis direction P, the magnetic poles of one second magnet 42, the first magnet 41, and the other second magnet 42 are sequentially: S pole, N pole, S pole, N pole, N pole, S pole. That is, the magnetic pole of the first magnet 41 near one second magnet 42 is the S pole, which is opposite to the N pole of that second magnet 42; the magnetic pole of the first magnet 41 near another second magnet 42 is the N pole, which is the same as the N pole of that second magnet 42. Based on the principle that opposite magnets attract each other, and like magnets repel each other, the second lens assembly 20 moves towards the first lens assembly 10. At this time, a high-magnification shooting mode can be provided. The third lens assembly 30 can be moved relative to the second lens assembly 20 by the second driving component, and focusing is achieved when the distance between them changes. When a second current direction opposite to the first current direction is applied to the two second magnets 42, the magnetic poles of the second magnet 42, the first magnet 41, and the other second magnet 42 sequentially change to: N pole, S pole, S pole, N pole, S pole, N pole. Therefore, the second lens assembly 20 moves away from the first lens assembly 10, achieving a low-magnification shooting mode.

[0019] In other embodiments, when viewed along the same end of the optical axis direction P in the first energizing direction, the magnetic poles of the second magnet 42, the first magnet 41 and the second magnet 42 can also be in the following order: N pole, S pole, N pole, S pole, S pole, N pole. When the second energizing direction is changed, the magnetic poles of the second magnet 42, the first magnet 41 and the second magnet 42 are: S pole, N pole, N pole, S pole, N pole, S pole.

[0020] In some other embodiments, the first magnet 41 and the two second magnets 42 are both electromagnets. Similar to the above embodiments, the magnetic poles of the two second magnets 42 are changed by changing the direction of energization. The difference is that the polarization of the first magnet 41 is achieved by energizing.

[0021] In some other embodiments, the first magnet 41 is an electromagnet, and the two second magnets 42 are permanent magnets. When an electric current is applied to the first magnet 41 to polarize it, and the direction of the current is changed to alter the magnetic polarity of the first magnet 41, the second lens assembly 20 moves away from or closer to the first lens assembly 10, thereby achieving different magnification shooting modes. For example, in the first current direction, the magnetic poles of one second magnet 42, the first magnet 41, and the other second magnet 42 are sequentially: S pole, N pole, S pole, N pole, N pole, S pole. In the second current direction, the magnetic poles of one second magnet 42, the first magnet 41, and the other second magnet 42 are sequentially: S pole, N pole, N pole, S pole, N pole, S pole. Alternatively, in the first energizing direction, the magnetic poles of one second magnet 42, the first magnet 41, and the other second magnet 42 are, in sequence: N pole, S pole, N pole, S pole, S pole, N pole. In the second energizing direction, the magnetic poles of one second magnet 42, the first magnet 41, and the other second magnet 42 are, in sequence: N pole, S pole, S pole, N pole, S pole, N pole.

[0022] In some other embodiments, the first magnet 41 is an electromagnet, one second magnet 42 is a permanent magnet, and the other second magnet 42 is an electromagnet. The mechanism for realizing the two shooting modes is the same as in the above embodiments. The difference is that one of the second magnets 42 needs to be electrically polarized.

[0023] This invention changes the magnetic poles of an electromagnet by altering the energizing direction of the first magnet 41 and / or the two second magnets 42, thereby moving the second lens assembly 20 closer to or further away from the first lens assembly 10. Furthermore, by adjusting the second driving component, the third lens assembly 30 is driven relative to the second lens assembly 20 to achieve focusing, thus realizing two magnification shooting modes. This invention does not require a photoelectric sensor; a photoelectric sensing block, a position magnetic strip, and a magnetic strip support post are sufficient to achieve the positioning and movement of the second lens assembly 20 relative to the first lens assembly 10. The second driving component can adjust the positioning and movement of the third lens assembly 30 relative to the second lens assembly 20 to achieve focusing. The structure of this invention is relatively simple, reducing costs; therefore, the lens module 100 provided by this invention can be applied to some relatively low-priced electronic devices.

[0024] Referring to Figure 3, the second lens assembly 20 includes a lens element 22 and a connector 21. The connector 21 includes a first end face 211, a second end face 212, and a third end face 213. The first end face 211 and the second end face 212 are spaced apart from each other along the optical axis direction P. The third end face 213 is adjacent to the first end face 211 and the second end face 212. The lens element 22 is placed on the connector 21 and protrudes towards the third end face 213. The first magnet 41 is connected to the third end face 213 and protrudes from the third end face 213. Placing the first magnet 41 and the lens element 22 on the same side of the connector 21 helps to reduce the volume occupied by the first magnet 41 and the lens element 22.

[0025] In some other embodiments, the first magnet 41 may be placed on the connector 21 and / or the lens 22, as long as it does not affect the polarization of the first magnet 41.

[0026] In some embodiments, the second driving component is a motor. The motor includes, but is not limited to, a voice coil motor. The sole purpose is to drive the third lens assembly 30 to move back and forth relative to the second lens assembly 20.

[0027] In some embodiments, the second drive component is positioned on the side of the third lens assembly 30 away from the second lens assembly 20.

[0028] In some embodiments, the lens module 100 further includes a prism 50, which is positioned on the side of the first lens assembly 10 away from the second lens assembly 20. The prism 50 includes a first optical end face 51, a second optical end face 52, and a third optical end face 53. The first optical end face 51, the second optical end face 52, and the third optical end face 53 intersect each other, with the second optical end face 52 positioned close to the first lens assembly 10. Light enters from the first optical end face 51, is reflected by the second optical end face 52, exits through the third optical end face 53, and enters the first lens assembly 10. The prism enables the lens module to achieve a periscope camera function.

[0029] Referring to Figures 1 and 4, in some other embodiments, the first optical end face 51 is perpendicular to the second optical end face 52, the angle α between the third optical end face 53 and the first optical end face 51 is 45 degrees, and the angle β between the third optical end face 53 and the second optical end face 52 is 45 degrees.

[0030] Referring to Figure 1, in some embodiments, the lens module 100 further includes two directional axes 60. The two directional axes 60 are arranged parallel to each other at intervals along the optical axis direction P. The two directional axes 60 are connected to the first lens assembly 10, and the second lens assembly 20 and the third lens assembly 30 move back and forth relative to the first lens assembly 10 along the two directional axes 60. The two directional axes 60 are provided to facilitate the coaxiality of the first lens assembly 10, the second lens assembly 20, and the third lens assembly 30.

[0031] In another embodiment, the two orientation axes 60 may not be provided.

[0032] In some embodiments, referring to FIG1, the lens module 100 further includes a housing 70, the housing 70 including a first housing 71, a second housing 72, a third housing 73 and a fourth housing 74, the first housing 71, the second housing 72, the third housing 73 and the fourth housing 74 together forming a receiving cavity (not shown in the figure), the first lens assembly 10, the second lens assembly 20, the third lens assembly 30, the first drive assembly 40, the prism 50 and the orientation axis 60 are all placed in the receiving cavity. The third housing 73 is provided with a slot 731, the slot 731 is used to expose the first optical end face 51, so that light from outside the electronic device enters the prism 50 through the slot 731.

[0033] In some embodiments, the second magnet 42 is connected to the second housing 72 to fix the two second magnets 42. In other embodiments, the second magnet 42 can be fixed by other means, as long as the fixation of the second magnet 42 is achieved.

[0034] This invention also provides an electronic device (not shown), which includes the lens module 100 described in any of the above embodiments.

[0035] In some embodiments, the electronic device is a mobile phone. In other embodiments, the electronic device includes, but is not limited to, a computer and a camera.

[0036] The above embodiments are only used to illustrate the present invention, but in actual application, they should not be limited to these embodiments. For those skilled in the art, other modifications and alterations made based on the technical concept of the present invention should all fall within the scope of the patent of the present invention. [Simplified Explanation of the Diagram]

[0009] Figure 1 is a schematic diagram of the exploded structure of the lens module provided in this embodiment;

[0010] Figure 2 is a cross-sectional view of the lens module described in Figure 1;

[0011] Figure 3 is a schematic diagram of the connection between the second lens assembly and the first magnet of the lens module described in Figure 1;

[0012] Figure 4 is a schematic diagram of the structure of the prism of the lens module described in Figure 1.

Claims

1. A lens module, comprising a first lens assembly, a second lens assembly, and a third lens assembly, wherein the first lens assembly, the second lens assembly, and the third lens assembly are arranged sequentially at intervals along the optical axis of the lens module, the lens module further comprising a first driving assembly and a second driving assembly, the first driving assembly driving the second lens assembly to move back and forth relative to the first lens assembly, the second driving assembly driving the third lens assembly to move back and forth relative to the second lens assembly, the first driving assembly comprising a first magnet and two second magnets, the first magnet being disposed on the second lens assembly, the two second magnets being respectively disposed on opposite sides of the first magnet along the optical axis, the first magnet and / or the two second magnets being electromagnets, and when polarized, the two second magnets having the same magnetism when close to the magnetic poles of the first magnet.

2. The lens module as described in claim 1, wherein, The two second magnets are electromagnets, and the first magnet is a permanent magnet.

3. The lens module as described in claim 1, wherein, The second lens assembly includes a lens element and a connector. The connector includes a first end face, a second end face, and a third end face. The first end face and the second end face are spaced apart from each other along the optical axis. The third end face is adjacent to the first end face and the second end face. The lens element is placed on the connector and protrudes towards the third end face. The first magnet is connected to the third end face and protrudes from the third end face.

4. The lens module as described in claim 1, wherein, The second drive component is a motor.

5. The lens module as described in claim 1, wherein, The second drive component is positioned on the side of the third lens component away from one of the second lens components.

6. The lens module as described in claim 1, wherein, The lens module also includes a prism, which is placed on the side of the first lens assembly away from the second lens assembly. The prism includes a first optical end face, a second optical end face, and a third optical end face. The first optical end face, the second optical end face, and the third optical end face intersect each other. The second optical end face is positioned close to the first lens assembly, so that light enters from the first optical end face, is reflected by the second optical end face, exits through the third optical end face, and enters the first lens assembly.

7. The lens module as described in claim 6, wherein, The first optical end face is perpendicular to the second optical end face, and the third optical end face forms an angle of 45 degrees with the first optical end face and the second optical end face.

8. The lens module as described in claim 1, wherein, The lens module further includes two orientation axes, which are arranged parallel to each other along the optical axis. The two orientation axes are connected to the first lens assembly, and the second lens assembly and the third lens assembly move back and forth relative to the first lens assembly along the two orientation axes.

9. An electronic device, improved in that it includes the lens module described in any one of claims 1 to 8.

10. The electronic device as described in claim 1, wherein, The electronic device is a mobile phone.

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