CN111061028A

CN111061028A - Lens driving device, lens module and electronic equipment

Info

Publication number: CN111061028A
Application number: CN201911369809.0A
Authority: CN
Inventors: 韦华
Original assignee: New Shicoh Technology Co Ltd
Current assignee: New Shicoh Motor Co Ltd; New Shicoh Technology Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-24

Abstract

The invention discloses a lens driving device, which comprises a stator and a rotor, wherein the rotor comprises a carrier for bearing a lens and first magnets fixed on two sides of the carrier, the stator comprises a support and second magnets arranged on two sides of the support and opposite to the first magnets, an accommodating space for accommodating the rotor is arranged in the middle of the support, the support comprises an insulating body and at least two metal sheets embedded into the insulating body, and the two metal sheets are respectively opposite to the two first magnets. The invention also provides a lens module and an electronic device, which comprise the lens driving device. According to the lens driving device, the lens module and the electronic equipment, the metal sheet is embedded in the insulating body through the support and is opposite to the first magnet, so that the strength of the support can be increased, and the magnetic field strength between the stator and the rotor and the adhesion strength between the support and the second magnet can be increased.

Description

Lens driving device, lens module and electronic equipment

Technical Field

The present invention relates to the field of imaging technologies, and in particular, to a lens driving device, a lens module and an electronic apparatus.

Background

With the progress of science and technology, the application of camera modules is more and more extensive, and at present, except cameras, mobile phones, computers and other electronic equipment are equipped with camera modules, so that people can take pictures at any time and any place conveniently, and convenience and fun are brought to the life of people. The camera module comprises a Fixed Focus (FF) camera module and an Automatic Focusing (AF) camera module, and in the AF camera module, a lens can be driven to move by a lens driving device (motor) so as to realize focusing. Meanwhile, the current camera module generally has an anti-shake function, and therefore, the lens is also required to be movable.

In order to move the lens, the lens driving device generally includes a stator and a mover that are movable relative to each other, the mover carries the lens, and magnets are disposed on both the mover and the stator to generate a magnetic field force to maintain a proper gap between the stator and the mover, and the stator and the mover return to an initial state in time after moving relative to each other. However, due to the limitation of space, the magnetic field force between the magnets is usually small, resulting in poor anti-shake effect.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide a lens driving device, a lens module and an electronic device which can enable a lens to move more smoothly.

The invention provides a lens driving device, which comprises a stator and a rotor, wherein the rotor comprises a carrier for bearing a lens and first magnets fixed on two sides of the carrier, the stator comprises a support and second magnets arranged on two sides of the support and opposite to the first magnets, an accommodating space for accommodating the rotor is arranged in the middle of the support, the support comprises an insulating body and at least two metal sheets embedded into the insulating body, and the two metal sheets are respectively opposite to the two first magnets.

In one embodiment, the metal sheet is disposed in a transverse direction or/and a longitudinal direction of the insulation body.

In one embodiment, the metal sheet is disposed in the transverse direction and the longitudinal direction of the insulating body.

In one embodiment, the insulating body includes four side walls, each of the side walls is provided with the metal sheet, the metal sheets of each side wall are separately arranged, or the metal sheets of part of adjacent side walls are connected with each other, or the metal sheets of all the side walls are connected with each other to form a whole.

In one embodiment, two of the metal sheets opposite to the first magnet have a larger width than the other metal sheets.

In one embodiment, two metal sheets opposite to the first magnet are arranged in the longitudinal direction of the insulating body.

In one embodiment, the first magnet is a coil capable of adjusting the intensity of magnetic field, and the second magnet is a magnet.

In one embodiment, the metal sheet is a metal sheet with magnetism.

In one embodiment, the lens driving device is a lens driving device with an optical anti-shake function.

The invention also provides a lens module comprising the lens driving device.

The invention also provides electronic equipment comprising the lens module.

According to the lens driving device, the lens module and the electronic equipment, the metal sheet is embedded in the insulating body through the support and is opposite to the first magnet, so that the strength of the support can be increased, and the magnetic field strength between the stator and the rotor and the adhesion strength between the support and the second magnet can be increased.

Drawings

Fig. 1 is an exploded view of a lens driving device according to an embodiment of the invention.

Fig. 2 is another exploded view of the lens driving device shown in fig. 1.

Fig. 3 is an exploded perspective view of a first embodiment of a holder in the lens driving apparatus shown in fig. 2.

Fig. 4 is a cross-sectional view of the stent shown in fig. 3.

Fig. 5 is an exploded perspective view of a second embodiment of a holder in the lens driving device shown in fig. 2.

Fig. 6 is a cross-sectional view of the stent shown in fig. 5.

Fig. 7 is an exploded perspective view of a third embodiment of a holder in the lens driving apparatus shown in fig. 2.

Fig. 8 is a sectional view of a lens driving apparatus having the holder shown in fig. 7.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 and 2, in an embodiment of the invention, a lens driving apparatus includes a stator (not shown) and a mover (not shown).

The stator comprises a base 1 and a housing 6. The base 1 and the housing 6 form a receiving cavity for receiving the mover therein. In other embodiments, the housing 6 may not be provided, but the mover may be protected in other ways.

The base 1 comprises a base structure 11, a bracket 12, a second magnet 13. The bracket 12 is mounted above the floor structure 11 and has a rectangular frame shape including four side walls 121. The second magnets 13 are four in number and are respectively disposed inside the four side walls 121.

The mover comprises a lower elastic sheet 2, a carrier 3, an upper elastic sheet 4 and a first magnet 5. The carrier 3 is disposed on the base 1 for carrying the lens. The first magnets 5 are two in number and are fixed to both sides of the carrier 3, respectively. The upper elastic sheet 4 and the lower elastic sheet 2 are respectively arranged above and below the carrier 3, so that the rotor can move axially relative to the stator. The number of the second magnets 13 may be two, the second magnets are located at both sides of the frame 12 and correspond to the first magnet 5, and a proper gap is maintained between the stator and the mover by the magnetic field force between the first magnet 5 and the second magnet 13, and the stator and the mover are timely restored to the initial state after the mutual movement. In this embodiment, the first magnet 5 is a coil for adjusting the magnetic field intensity by adjusting the current, and the second magnet 13 is a magnet, so that the mover can be moved to a desired position by adjusting the magnetic field of the first magnet 5, thereby canceling the influence caused by jitter and playing an optical anti-shake role. And the rotor can move along the axial direction by matching the upper elastic sheet 4 and the lower elastic sheet 2 to play a role of automatic focusing. Of course, the first magnet may be a magnet, the second magnet may be a coil, or both may be coils. The second magnet is a magnet which can block the influence of an external magnetic element on the coil. The mover can be driven to move in other ways such as memory alloy, and the magnetic force between the first magnet 5 and the second magnet 13 only needs to keep a proper gap between the stator and the mover and timely return to the initial state after the stator and the mover move mutually.

In this embodiment, the bracket 12 includes an insulating body 122 and a metal plate embedded in the insulating body 122. The insulating body 122 may be made of plastic, silicon gel, or the like. The metal sheet may be a magnetizable metal, magnetized by the second magnet 13, such as iron; it may be a metal sheet having magnetic properties, such as a magnet.

As shown in fig. 3 and 4, in the first embodiment of the bracket 12, four metal sheets 123 are provided, and are all disposed in the transverse direction of the insulating body 122. Two of the metal sheets are respectively and independently arranged on the two opposite side walls, and the other two metal sheets are positioned on the other two opposite side walls and extend to the adjacent side walls. The transverse direction of the insulating body 122 can better increase the strength of the bracket 12 in the longitudinal direction, and can also increase the magnetic force between the stator and the mover and the adhesion strength between the bracket 12 and the second magnet 13.

As shown in fig. 5 and 6, in the second embodiment of the bracket 12, six metal sheets 124 are provided, and are all disposed in the longitudinal direction of the insulating body 122. Wherein, four metal sheets are respectively arranged on two opposite side walls, and each side wall is provided with two metal sheets. The other two metal sheets are positioned on the other two opposite side walls. The other two metal sheets are respectively arranged at the corresponding positions of the first magnet 5, and the width of the other two metal sheets is larger than that of the other four metal sheets. The longitudinal direction of the insulating body 122 is preferably set to increase the strength of the bracket 12 in the lateral direction, and is opposite to the first magnet 5, so that the magnetic force between the stator and the mover and the adhesion strength between the bracket 12 and the second magnet 13 can be preferably increased.

In a third embodiment of the support 12, as shown in fig. 7 and 8, the metal sheets 125 are seven, including four transverse metal sheets and six longitudinal metal sheets, and all of the metal sheets are integrally connected to each other to facilitate the molding operation of the insulating body 122. The four transverse metal sheets and the six longitudinal metal sheets may adopt the structures of the first embodiment and the second embodiment described above. The four transverse metal sheets and the six longitudinal metal sheets enable the metal sheets to be arranged in the transverse direction and the longitudinal direction of the insulating body. Two of the longitudinal metal sheets are arranged at corresponding positions of the first magnet 5, and the width of the longitudinal metal sheets is larger than that of the other metal sheets. In other embodiments, the metal sheet can be disposed in the transverse direction and the longitudinal direction of the insulating body by other structures. The transverse and longitudinal directions of the insulating body 122 are preferably set to increase the strength of the bracket 12 in the longitudinal and transverse directions, and a portion of the longitudinal direction is set to be opposite to the first magnet 5, so that the magnetic force between the stator and the mover and the adhesion strength between the bracket 12 and the second magnet 13 can be preferably increased.

Of course, other embodiments will occur to those skilled in the art based on the above embodiments, such as the first and second embodiments in which the metal sheets of all the side walls are integrally connected to each other; in a third embodiment, the transverse metal sheets are provided independently of the longitudinal metal sheets.

The invention also provides an embodiment of a lens module, which comprises the lens driving device.

The invention also provides an embodiment of the electronic device, which comprises the lens module.

Compared with the existing lens driving device, the embodiment has the following advantages:

1. the bracket is embedded with the metal sheet in the insulating body, so that the strength of the bracket can be increased;

2. the metal sheet is opposite to the first magnet and the second magnet, so that the magnetic field intensity between the stator and the rotor and the adhesion strength between the bracket and the second magnet can be increased;

3. the width of the two metal sheets opposite to the first magnet is larger than that of the other metal sheets, so that the magnetic field intensity between the stator and the rotor and the adhesion strength between the bracket and the second magnet can be further increased.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The lens driving device is characterized by comprising a stator and a rotor, wherein the rotor comprises a carrier for bearing a lens and first magnets fixed on two sides of the carrier, the stator comprises a support and second magnets arranged on two sides of the support and opposite to the first magnets, an accommodating space is arranged in the middle of the support for accommodating the rotor, the support comprises an insulating body and metal sheets embedded into the insulating body, and the number of the metal sheets is at least two, wherein the two metal sheets are respectively opposite to the two first magnets.

2. A lens driving apparatus according to claim 1, wherein the metal plate is provided in a lateral direction or/and a longitudinal direction of the insulating body.

3. A lens driving apparatus according to claim 1, wherein the insulating body includes four side walls, each of the side walls is provided with the metal sheet, the metal sheets of the side walls are separately provided, or the metal sheets of some adjacent side walls are connected to each other, or the metal sheets of all the side walls are connected to each other to form a whole.

4. A lens driving apparatus according to claim 1, wherein two of said metal plates opposed to said first magnet are wider than the other of said metal plates.

5. A lens driving device according to claim 1, wherein two of said metal plates opposed to said first magnet are provided in a longitudinal direction of said insulating body.

6. The lens driving apparatus as claimed in claim 1, wherein the first magnet is a coil capable of adjusting a magnetic field strength, and the second magnet is a magnet.

7. The lens driving apparatus as claimed in claim 1, wherein the metal plate is a metal plate having magnetism.

8. A lens driving apparatus according to claim 1, wherein the lens driving apparatus is a lens driving apparatus having an optical anti-shake function.

9. A lens module comprising the lens driving device as claimed in any one of claims 1 to 8.

10. An electronic device comprising the lens module according to claim 9.