Lens driving device, photographic device and electronic product
阅读说明：本技术 一种透镜驱动装置、照相装置、电子产品 (Lens driving device, photographic device and electronic product ) 是由 王在伟 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种透镜驱动装置、照相装置、电子产品,其技术方案要点是：一种透镜驱动装置,包括定子组件、动子组件、第一驱动机构、第二驱动机构,所述第一驱动机构与所述第二驱动机构分设于所述动子组件两侧；所述第一驱动机构包括设置于所述动子组件的第一磁石组、与所述第一磁石组相应的第一线圈组、连接于所述定子组件的第一柔性板；所述第二驱动机构包括设置于动子组件背离第一磁石组一侧侧壁的第二磁石组、连接于所述定子组件的第二柔性板、连接于所述第二柔性板并与所述第二磁石组连接的第二线圈。本发明达到最优的光轴,实现Tilt的高精度控制,且结构简单,安装方便。(The invention discloses a lens driving device, a photographic device and an electronic product, and the technical scheme is as follows: a lens driving device comprises a stator assembly, a rotor assembly, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are respectively arranged on two sides of the rotor assembly; the first driving mechanism comprises a first magnet group arranged on the rotor assembly, a first coil group corresponding to the first magnet group and a first flexible plate connected to the stator assembly; the second driving mechanism comprises a second magnet group arranged on the side wall of the mover assembly, which is far away from the first magnet group, a second flexible plate connected with the stator assembly, and a second coil connected with the second flexible plate and the second magnet group. The invention achieves the optimal optical axis, realizes the high-precision control of Tilt, and has simple structure and convenient installation.)
1. The utility model provides a lens driving device, includes stator module, active cell subassembly, first actuating mechanism, second actuating mechanism, its characterized in that:
the first driving mechanism and the second driving mechanism are respectively arranged on two sides of the rotor assembly;
the first drive mechanism includes a first set of magnets (602) disposed at the mover assembly,
a first coil group (603) corresponding to the first magnet group (602),
a first flexplate (601) connected to the stator assembly;
the second driving mechanism comprises a second magnet group (701) arranged on the side wall of the rotor assembly, which is far away from the first magnet group (602),
a second flexible plate (702) coupled to the stator assembly,
a second coil (703) connected to the second flexible sheet (702) and connected to the second set of magnets (701).
2. A lens driving device according to claim 1, wherein: the first magnet group (602) comprises at least 2 first magnets (604) which are sequentially arranged, the arrangement direction of the first magnets (604) is arranged along the moving direction of the rotor assembly, and the magnetic pole of the first magnet (604) on one side facing the first coil group (603) is opposite to the magnetic pole of the first magnet (604) on the other side.
3. A lens driving device according to claim 1, wherein: the second magnet groups (701) and the second coils (703) are arranged into two groups, and the two groups of the second magnet groups (701) are positioned at the same side of the rotor assembly and are arranged in a direction perpendicular to the moving direction of the rotor assembly.
4. A lens driving device according to claim 1, wherein: the rotor component comprises a carrier (1) and two springs (2) which are arranged at two ends of the carrier (1) in the moving direction, the springs (2) are connected with the stator component, the springs (2) comprise inner fixing portions (301) connected to the end face of the carrier (1), outer fixing portions (302) connected to the stator component, and two cantilever portions (303) connected between the inner fixing portions (301) and the outer fixing portions (302), and the cantilever portions (303) are symmetrically arranged on two sides of the inner fixing portions (301).
5. A lens driving device according to claim 4, wherein: the end face of the carrier (1) in the moving direction is provided with a jack (10) for inserting a lens, and the inner fixing part (301) is annularly arranged and is convenient for loading the lens.
6. A lens driving device according to claim 5, wherein: the stator assembly comprises a frame body (4) and a shell (5), the outer fixing portion (302) is connected to the frame body (4), and the shell (5) covers the frame body (4).
7. A photographic apparatus, characterized in that: having a lens driving device as claimed in any one of claims 1 to 6.
8. An electronic product, characterized in that: the camera device according to claim 7.
Technical Field
The present invention relates to the field of photographic devices, and in particular, to a lens driving device, a photographic device, and an electronic product.
Background
The existing automatic focusing device is formed by accumulating the heights of a voice coil motor, a lens, an image sensor and a circuit board, and the bottleneck appears in the use of products in the prior art due to the improvement of mobile phone pixels and the requirement of thinner and thinner product heights.
The overall optical height of the large aperture and high pixel lens is relatively high, so that the existing accumulated product height cannot meet the requirement of an ultrathin mobile phone body. Therefore, a lens driving device structure is needed to be used, the lens driving device structure is transversely arranged in the mobile phone, an optical conversion component is added, the mobile phone is composed of a lens driving device, a lens group, a prism and the like, and light is refracted to enter the lens group through a special optical prism to realize imaging.
The existing lens driving device is composed of AF and OIS, wherein, the driving of AF and OIS (coil + magnet) is generally on one side of the drawtube (mover), the coil and magnet of AF part can be put down or can be made on one FPC; the elastic pieces are mostly arranged on the upper end side or two sides of the rotor, and due to different design of wrist structures of the elastic pieces, when the rotor moves relative to the stator, position deviation is inevitably generated, so that Tilt control accuracy is not high; in the conventional lens driving device, the adopted driving mode is realized by matching the coil and the magnet, the magnet matched with the coil is of a magnet structure, and when the Hall element detects magnetic flux, the Hall element causes detection errors due to different magnetic fluxes at different positions.
Therefore, there is a need for an improved structure that overcomes the above-mentioned deficiencies.
Disclosure of Invention
The invention aims to provide a lens driving device, a photographic device and an electronic product, which achieve the optimal optical axis, realize the high-precision control of Tilt, and have simple structure and convenient installation.
The technical purpose of the invention is realized by the following technical scheme: a lens driving device comprises a stator assembly, a rotor assembly, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are respectively arranged on two sides of the rotor assembly; the first driving mechanism comprises two first magnet groups arranged on the rotor assembly, two first coil groups corresponding to the first magnet groups respectively, and a first flexible plate connected to the stator assembly and connected with the two first coil groups, wherein the two first magnet groups are positioned on the same side wall of the rotor assembly; the second driving mechanism comprises a second magnet group arranged on the side wall of the mover assembly, which is far away from the first magnet group, a second flexible plate connected with the stator assembly, and a second coil connected with the second flexible plate and the second magnet group.
The invention is further provided with: the first magnet group comprises at least 2 first magnets which are sequentially arranged, the arrangement direction of the first magnets is arranged along the moving direction of the rotor assembly, and the magnetic pole of the first magnet on one side, which faces the first coil group, is opposite to the first magnet on the other side.
In one embodiment: the magnet group is made of three magnets to improve the linearity of the motor, and as shown in fig. 9 and fig. 10, the first magnet group comprises three first magnets which are sequentially arranged, the arrangement direction of the three first magnets is arranged along the moving direction of the rotor assembly, wherein the magnetic pole of the first magnet in the middle facing the first coil group is opposite to that of the first magnets on both sides; the first coil group comprises two first coils which are arranged adjacently, and the two first coils are respectively positioned between two corresponding adjacent first magnets.
The invention is further provided with: the second magnet groups and the second coils are arranged into two groups, and the two groups of second magnet groups are positioned on the same side of the rotor assembly and are perpendicular to the moving direction of the rotor assembly in the arrangement direction.
The invention is further provided with: the rotor assembly comprises a carrier and two springs which are respectively arranged at two ends of the carrier in the moving direction, the springs are connected with the stator assembly, the springs comprise inner fixing parts connected with the end face of the carrier, outer fixing parts connected with the stator assembly, and two cantilever parts connected between the inner fixing parts and the outer fixing parts, and the two cantilever parts are symmetrically arranged at two sides of the inner fixing parts.
The invention is further provided with: the end face of the carrier in the moving direction is provided with a jack for inserting the lens, and the inner fixing part is annularly arranged and is convenient for loading the lens.
The invention is further provided with: the stator assembly comprises a frame body, a shell and a drive FPC, wherein the outer fixing part is connected to the frame body, and an electrode terminal is introduced into the drive FPC; the shell can be an integral structure to coat the frame body; the shell can also be composed of an upper cover and a lower cover, and the upper cover and the lower cover surround the frame body.
The invention is further provided with: a photographic apparatus is provided with the lens driving device.
The invention is further provided with: an electronic product is provided with the camera device.
In conclusion, the invention has the following beneficial effects:
through the mutual staggered connected mode of three first magnets for three magnets adsorb each other together, and through setting up two adjacent first coils of arranging, realize that the magnetic force effect between first coil assembly and the first magnet group is more steady, make the carrier remove more stably, and be convenient for to the precision control that the carrier removed.
The anti-shaking effect on the carrier is realized through the relative effect of the second coil and the second magnet group.
When the three first magnets are mutually adsorbed, and two first coils which are sequentially arranged are arranged, the carrier is driven to stably move; due to the arrangement mode of the three first magnets, the detection element can detect more magnetic fluxes, and better current and stroke linearity can be obtained through IC control and simulation, so that the movement precision of the control carrier is improved. In addition, the detection elements corresponding to the first coil groups on the two sides independently supply power, the angle position change of the carrier can be sensed, the angle position change signal is transmitted to the IC element through the induction element, the IC element independently controls the current of the first coil to balance the change of the angle, the optimal optical axis is achieved, and the Tilt high-precision control is achieved.
In order to avoid magnetic interference between the first driving mechanism and the second driving mechanism, the first magnet group and the second magnet group are arranged on two sides of the carrier, the magnetic poles are arranged up and down to reduce the magnetic interference around, and in addition, the magnetic field interference between the first magnet group and the second magnet group can be further separated through the magnetic conductive sheet.
Drawings
FIG. 1 is an exploded view of example 1;
FIG. 2 is a schematic view of
FIG. 3 is a first cross-sectional view of the
FIG. 4 is a second sectional view of the
FIG. 5 is a schematic view of the installation positions of the first coil group and the first magnet group;
FIG. 6 is an exploded view of the first and second drive mechanisms;
FIG. 7 is a schematic view of the spring structure;
FIG. 8 is a schematic view of example 1;
FIG. 9 is a linear graph of current and lens movement in a conventional lens driving device, wherein three lines respectively represent upward, horizontal, and downward states of the lens driving device;
fig. 10 is a linear graph of current and lens movement stroke in the lens driving device of example 2, and there is no linear deviation between current and lens movement stroke in the upward, horizontal, and downward states of the lens driving device.
The corresponding part names indicated by the numbers in the figures: 1. a carrier; 2. a spring; 301. an inner fixing portion; 302. an outer fixing portion; 303. a cantilever portion; 4. a frame body; 5. a housing; 501. an upper cover; 502. a lower cover; 601. a first flexible sheet; 602. a first magnet group; 603. a first coil group; 604. a first magnet; 605. a first coil; 701. a second magnet group; 702. a second flexible board; 703. a second coil; 704. an OIS magnet; 8. a detection element; 9. a magnetic conductive sheet; 10. and (4) inserting the jack.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
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