CN108828747B

CN108828747B - Lens driving motor, lens driving motor assembly, camera and mobile terminal device

Info

Publication number: CN108828747B
Application number: CN201810961619.7A
Authority: CN
Inventors: 王建华; 龚高峰; 张晓良
Original assignee: Shanghai Xinmai Electronic Technology Co ltd
Current assignee: Shanghai Xinmai Electronic Technology Co ltd
Priority date: 2018-08-22
Filing date: 2018-08-22
Publication date: 2024-03-26
Anticipated expiration: 2038-08-22
Also published as: CN108828747A

Abstract

The invention provides a lens driving motor, a lens driving motor assembly, a camera and a mobile terminal device. The lens driving motor comprises a shell, a lens supporting body, a coil and a magnet assembly, wherein the coil is wound on the lens supporting body and arranged in the shell, the magnet assembly is arranged between the lens supporting body and the shell, the magnet assembly comprises a plurality of sub magnets, and the sub magnets are multipolar magnetizing magnets. The invention solves the problem that the magnetic interference of the lens driving motor needs to be improved in the prior art.

Description

Lens driving motor, lens driving motor assembly, camera and mobile terminal device

Technical Field

The invention relates to the technical field of camera equipment, in particular to a lens driving motor, a lens driving motor assembly, a camera and a mobile terminal device.

Background

Since a thin and lightweight structure is generally required for mobile terminal devices such as mobile phones, a higher requirement is placed on motor design in a predetermined external dimension, and it is difficult for a thin motor to generally satisfy various performance requirements. One of the obvious problems is that the thinner the motor design, the more insufficient the driving force tends to drive the lens to move.

On the other hand, in order to obtain a high-definition image capturing effect, the requirements on imaging lenses mounted on mobile phones, cameras and the like are also increasing, and currently, configuring a larger lens for a camera is a relatively direct and effective way of obtaining a high-definition image. It is known that the larger the mounted lens, the higher the driving force requirement for driving the lens. However, on the premise of thinning the mobile phone, development of a motor with large driving force is limited to a certain extent, and it is difficult to effectively drive a lens with large weight to an ideal position, so that an imaging effect of an image is finally affected.

In order to improve the imaging effect of the camera, the double-shot motor is gradually developed and utilized in various middle-high-end mobile phones, but certain puzzles exist in the practical application process, and particularly, the two double-shot motors have a certain magnetic interference phenomenon with each other, so that the normal exertion of the double-shot motor effect is influenced.

That is, magnetic interference of the lens driving motor needs to be improved.

Disclosure of Invention

The present invention provides a lens driving motor, a lens driving motor assembly, a camera and a mobile terminal device, which are used for solving the problem that the magnetic interference of the lens driving motor needs to be improved in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a lens driving motor including a housing, a lens support, a coil wound on the lens support and disposed within the housing, and a magnet assembly disposed between the lens support and the housing, wherein the magnet assembly includes a plurality of sub magnets, which are multipolar magnetizing magnets.

Further, the sub-magnet is a quadrupole magnetizing magnet, and the middle part of the sub-magnet is provided with a non-magnetic area.

Further, the height of the nonmagnetic regions is 0.2 mm or more and 0.5 mm or less.

Further, the coils are two groups, the two groups of coils are wound on the lens support body and are arranged at intervals in the height direction of the lens support body, one group of coils are arranged corresponding to the upper side part of the nonmagnetic region, and the other group of coils are arranged corresponding to the lower side part of the nonmagnetic region.

Further, the lens support body has a spacer rib for spacing the two sets of coils.

Further, the height of the upper portion of the nonmagnetic region is greater than the height of the lower portion of the nonmagnetic region.

Further, the upper end face of the lens support body is also provided with an inserting notch which is in inserting fit with the flanging of the shell, and the inserting notch is in a shape of a periphery-closed notch.

Further, the lens support body is also provided with a stop piece extending towards the sub-magnet, one side surface of the stop piece, facing the sub-magnet, is a stop surface, and the stop surface is matched with the sub-magnet in a stop mode to prevent the lens support body from deflecting.

Further, a marking structure is arranged at the corner of the sub magnet.

Further, the identification structure is a unfilled corner arranged at the corner of the sub magnet.

Further, a plurality of sub-magnets are respectively arranged in a group of oppositely arranged side walls of the shell.

Further, the shell is made of a first material at a position corresponding to the position where the sub-magnets are arranged; the housing is made of a second material at a position where the corresponding sub-magnet is not present, and the magnetic permeability of the first material is higher than that of the second material.

Further, the first material is SUS400 series or SPCC; and/or the second material is SUS305.

Further, the lens driving motor further includes: an upper spring provided with a first fool-proof structure; the frame, the frame is provided with the second and prevents slow-witted structure, and first slow-witted structure and the slow-witted structure cooperation of second prevent that the spring is installed with the frame in place, goes up spring and frame and all is located the shell.

Further, the first fool-proof structure is located on the outer ring side of the upper spring.

Further, the first fool-proof structure is a positioning socket arranged on the upper spring; the second fool-proof structure is a positioning protrusion arranged on the frame, and the positioning protrusion can be embedded into the positioning socket.

Further, the lens driving motor further includes a flexible circuit board disposed on a side wall of the housing and protruding from inside the housing.

Further, the side wall of the shell of the flexible circuit board is led out to serve as an installation positioning surface, a sub magnet is not arranged at the installation positioning surface, and the flexible circuit board is located at the installation positioning surface.

Further, the side wall of the shell of the flexible circuit board is led out to serve as an installation positioning surface, a sub magnet is not arranged at the installation positioning surface, the side wall of the shell adjacent to the installation positioning surface is a terminal leading-out surface, and the flexible circuit board is led out by the installation positioning surface, bent and extends along the terminal leading-out surface.

In order to achieve the above object, according to another aspect of the present invention, there is provided a lens driving motor assembly including a plurality of the above lens driving motors, and no sub-magnet is provided in a side where two adjacent lens driving motors are close to each other.

Further, the number of the lens driving motors is two, the two lens driving motors are arranged in parallel, two sub magnets are arranged in each lens driving motor, and the two sub magnets are respectively positioned in a group of side walls of the lens driving motors which are oppositely arranged.

In order to achieve the above object, according to another aspect of the present invention, there is provided a camera including: the lens driving motor described above; or a lens driving motor assembly as described above.

In order to achieve the above object, according to another aspect of the present invention, there is provided a mobile terminal apparatus including the above camera.

Further, the mobile terminal device includes at least one of a mobile phone, a portable information terminal, and a notebook computer.

By applying the technical scheme of the invention, the coil is wound on the lens support body and arranged in the shell, and the magnet assembly is arranged between the lens support body and the shell, wherein the magnet assembly comprises a plurality of sub magnets which are multipolar magnetizing magnets.

Through the sub-magnetite that uses multipolar magnetite that magnetizes, can make multipolar magnetite's both ends magnetic line of force distribution area more concentrate for the magnetic field is more concentrated to inject in the shell, thereby can reduce lens drive motor's magnetic leakage, avoid mutual magnetic interference between the motor, be favorable to promoting magnetic field strength, but greatly increased motor's driving force, make can produce great driving force under very little electric current effect, be favorable to reducing the energy consumption, in addition, because magnetic field strength is promoted effectively, therefore can be lighter and thinner with the magnetic field component design, and then can design more frivolous lens drive motor, improve the aesthetic property.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic diagram of a lens driving motor in an alternative embodiment of the invention;

FIG. 2 shows an exploded view of FIG. 1;

FIG. 3 is a schematic diagram showing the structure of the sub-magnet in FIG. 2;

fig. 4 shows a front view of fig. 3;

FIG. 5 shows a schematic view of the structure of the lens support of FIG. 2;

FIG. 6 shows a schematic view of another angle of the lens support of FIG. 5;

FIG. 7 shows a top view of FIG. 6;

FIG. 8 is a schematic diagram showing the positional relationship among the flexible circuit board, the housing, the sub-magnets, and the upper springs in FIG. 2;

FIG. 9 is a schematic diagram showing the positional relationship among the base, the lower spring, the sub-magnets, the lens support body, and the coils in FIG. 2;

FIG. 10 is a schematic diagram showing the positional relationship between the sub-magnets and the coils in FIG. 9;

FIG. 11 shows a side view of FIG. 10;

FIG. 12 is a schematic diagram showing the positional relationship between the sub-magnets and the lens support in FIG. 1;

FIG. 13 is a schematic view showing the positional relationship between a neutron magnet and a lens support according to another alternative embodiment of the present invention;

fig. 14 shows a schematic diagram of the positional relationship of the twin-camera motor of the present invention.

Wherein the above figures include the following reference numerals:

10. a housing; 11. flanging; 12. installing a positioning surface; 13. a terminal lead-out surface; 20. a lens support; 21. a spacer rib; 22. a socket recess; 23. a stopper; 231. a stop surface; 30. a coil; 31. a lead wire; 40. a sub-magnet; 41. a nonmagnetic region; 42. identifying a structure; 50. a spring is arranged; 51. a first fool-proof structure; 60. a lower spring; 70. a base; 71. a center avoidance opening; 81. a notch portion; 82. a boss; 90. a frame; 91. a second fool-proof structure; 100. a flexible circuit board.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that 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 application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

In order to solve the problem that magnetic interference of a lens driving motor needs to be improved in the prior art, the invention provides the lens driving motor, a lens driving motor assembly, a camera and a mobile terminal device. The camera has a lens driving motor or a lens driving motor assembly described below. The mobile terminal device has the camera.

Optionally, the mobile terminal device includes at least one of a mobile phone, a portable information terminal, and a notebook computer.

Example 1

As shown in fig. 1 to 11, the lens driving motor includes a housing 10, a lens support 20, a coil 30, and a magnet assembly, the coil 30 being wound on the lens support 20 and disposed within the housing 10, the magnet assembly being disposed between the lens support 20 and the housing 10, wherein the magnet assembly includes a plurality of sub-magnets 40, the sub-magnets 40 being multipolar magnetizing magnets.

The sub-magnets 40 of the multipolar magnetizing magnet are used, so that the distribution area of magnetic force lines at two ends of the multipolar magnetizing magnet is more concentrated, the magnetic field is more concentrated and limited in the shell 10, the magnetic leakage of the lens driving motor can be reduced, the mutual magnetic interference between the motors is avoided, the magnetic field intensity is improved, the driving force of the motor can be greatly increased, the larger driving force can be generated under the action of small current, the energy consumption is reduced, in addition, the magnetic field intensity is effectively improved, the design of the magnetic field assembly is lighter and thinner, the lens driving motor which is lighter and thinner can be designed, and the aesthetic property is improved.

The sub-magnets 40 used in the present embodiment are whole strip magnets, and the magnetizing method is "multipolar magnetizing". Compared with monopole magnetization, the distribution area of magnetic lines at two ends of the multipolar magnetization magnet is more concentrated, and mutual magnetic interference between the double-shot motors is effectively avoided.

Alternatively, the sub-magnet 40 is a quadrupole magnetizing magnet, and the middle part of the sub-magnet 40 has a non-magnetic region 41. The magnetic lines of force at the two ends of the quadrupole magnetizing magnet are small in emission, the magnetic attraction between the two motors is small, and mutual interference is small. Therefore, the distance between two adjacent lens driving motors can be designed to be closer, the space is saved, the miniaturization of the mobile phone and other equipment is facilitated, and the lens driving motor is particularly suitable for being used on a double-shot motor.

By providing the blank nonmagnetic region 41, the lens driving motor is limited to only produce electromagnetic action with the corresponding coil in the whole action process, so that off-site cross induction is prevented. This has the advantage that the uniformity of the electromagnetic force direction of the lens driving motor can be maintained at all times, and the internal maximum driving force can be exerted. That is, the purpose of introducing nonmagnetic regions 41 is to: in order to ensure that the electromagnetic force acting direction inside the whole lens driving motor is always consistent in the moving process of the rotor component.

As shown in fig. 2 and 9, the coils 30 are two sets, and the two sets of coils 30 are wound around the lens support 20 and are arranged at intervals in the height direction of the lens support 20, one set of coils 30 is arranged corresponding to the upper portion of the nonmagnetic region 41, and the other set of coils 30 is arranged corresponding to the lower portion of the nonmagnetic region 41. The two sets of coils 30 respectively correspond to the upper half and the lower half of the nonmagnetic region 41, so that the corresponding action generates electromagnetic force of consistent direction, avoiding mutual interference.

In fig. 5, 6 and 9, the lens support body 20 has a spacer 21 for spacing the two sets of coils 30. Through setting up the muscle 21 that separates, can effectively separate upper and lower two sets of coils 30, and guarantee that both are in suitable mounted position to improve the installation reliability of coil 30, and make the operation of lens driving motor more reliable.

In the embodiment shown in fig. 11, a lead wire is connected between the two sets of coils 30, so that the interiors of the two sets of coils 30 are electrically connected to each other. The two sets of coils 30 are integrally wound on the lens support 20.

The height of the upper portion of the nonmagnetic region 41 in the present invention is greater than the height of the lower portion of the nonmagnetic region 41 (see fig. 3, 4, and 11). It should be noted that this is only the case in one embodiment, and the height of the upper portion of the nonmagnetic region 41, the height of the lower portion of the nonmagnetic region 41, and the height of the nonmagnetic region 41 are determined comprehensively by the overall height of the lens driving motor and the effective area of action with the coil 30. That is, the reasonable height of the upper portion of the nonmagnetic region 41, the height of the lower portion of the nonmagnetic region 41, and the height of the nonmagnetic region 41 are planned, so that the space structure of the lens driving motor can be saved to some extent, and the lens driving motor tends to optimize the thin structure.

Specifically, the height of the nonmagnetic regions 41 is 0.2 mm or more and 0.5 mm or less. In the specific embodiment shown in fig. 3 and 4, the identification structure 42 is provided at the corner of the sub-magnet 40. Since the multipole magnet is strictly required to correspond to the magnetic poles when in use, the sub magnets 40 need to be mounted in a specific manner and position. Through setting up the sign structure 42, can conveniently confirm the mounted position of sub-magnetite 40, can effectively avoid sub-magnetite 40 to adorn in reverse like this, and lead to the condition that coil 30 and sub-magnetite 40's upper and lower side part do not correspond to improve lens driving motor's installation accuracy and operational reliability.

Specifically, the identification structure 42 is a unfilled corner provided at a corner of the sub-magnet 40. As shown in fig. 2, when two sub-magnets 40 are placed in the housing 10, it is required that both unfilled corners of the two sub-magnets 40 are located at the right lower portion and then placed in sequence in the housing 10.

Note that the marking position of the marking structure 42 is not limited to the right lower portion in the present embodiment. Nor is its identification form limited to a corner-missing shape. Such as lines or watermark patterns.

As shown in fig. 8, a plurality of sub magnets 40 are respectively provided in a set of oppositely disposed side walls of the housing 10. Because the sub magnets 40 are respectively arranged on a group of opposite side walls of the casing 10, interference caused by the arrangement of the sub magnets 40 in adjacent side walls of the casing 10 is avoided, and the double-shot motor is also beneficial to application.

The housing 10 in the present invention is made of a first material at a position corresponding to the position where the sub-magnet 40 is provided; the housing 10 is made of a second material at a position where the corresponding sub-magnet 40 is not present, and the magnetic permeability of the first material is higher than that of the second material. That is, the housing 10 is formed of a combination of high magnetic permeability material and low magnetic permeability material, which combination does not blend the two materials, but uses different materials on different areas of the housing 10, and thus does not involve a change in the material itself.

Alternatively, the first material is SUS400 series or SPCC. The high magnetic permeability material can effectively play a role in shielding, so that the magnetic leakage of the sub-magnet 40 is very small, the problem of insufficient internal driving force of the lens driving motor is solved to a great extent, the magnetic field shielding effect is enhanced, and the driving force of the lens driving motor is also improved. The SPCC material has the function of magnetic leakage resistance, can prevent static electricity, has good protection function on the sub-magnet 40, is beneficial to improving the magnetic field intensity between the sub-magnet 40 and the coil 30, increases the driving force of the motor, and has lower cost. The case 10 is not limited to the SPCC or SUS material, and may be any material selected for the case 10 of the present invention as long as the performance of the SPCC material is satisfied and the performance of the SPCC material is positively affected in terms of leakage-proof magnetic properties.

Alternatively, the SUS400 series includes SUS430, SUS420J2, SUS440A, SUS L, and the like.

Alternatively, the second material is SUS305.

In order to increase the movement reliability of the lens drive motor, the upper end face of the lens support body 20 also has a socket 22 which is in socket fit with the flange 11 of the housing 10. Specifically, the plugging recess 22 is in a shape of a closed-around recess. The inserting notch 22 is inserted and embedded with the flanging 11, and has the function of axial torsion resistance limit. It should be noted that the common flanging socket is an open type with a gap in the circumferential direction. The plugging notch 22 in the application is in a shape of a notch with a closed periphery, and has the characteristics of good torsion resistance effect and more accurate limit.

As shown in fig. 5, the lens support 20 further has a stop 23 protruding toward the sub-magnet 40, and a stop surface 231 is formed on a side surface of the stop 23 facing the sub-magnet 40, and the stop surface 231 is in stop fit with the sub-magnet 40 to prevent the lens support 20 from deflecting. Optionally, the number of stops 23 is plural, each on a different side of the lens support 20. During the operation of the lens driving motor, the lens support body 20 has a slight wobbling and twisting phenomenon in the axial direction of the X, Y axis. By adding a plurality of stoppers 23 at the lower circumference of the lens support 20, the lateral torsion resistance in the Z-axis direction is increased, thereby improving the torsion resistance.

As shown in fig. 1, the lens driving motor further includes an upper spring 50 and a frame 90, the upper spring 50 being provided with a first fool-proof structure 51; the frame 90 is provided with a second fool-proof structure 91, and the first fool-proof structure 51 and the second fool-proof structure 91 cooperate to mount the upper spring 50 and the frame 90 in place, and the upper spring 50 and the frame 90 are both positioned in the housing 10. The first fool-proof structure 51 and the second fool-proof structure 91 cooperate to effectively avoid the influence on the movement of the moving part caused by the reverse installation of the upper spring 50, improve the installation accuracy of the lens driving motor, avoid the false assembly and improve the movement reliability of the lens driving motor.

As shown in fig. 8, the first fool-proof structure 51 is located on the outer ring side of the upper spring 50. Since the inner ring side of the upper spring 50 moves while the outer ring side does not move, the first fool-proof structure 51 is provided on the outer ring side without affecting the movement effect of the lens driving motor.

Specifically, the first fool-proof structure 51 is a positioning socket provided on the upper spring 50; the second fool-proof structure 91 is a positioning protrusion arranged on the frame 90, and the positioning protrusion can be embedded into the positioning socket. Because the upper spring 50 is not square, there are stringent requirements on the mounting direction. If the first fool-proof structure 51 is not provided on the upper spring 50, the mounting dislocation is easy. The upper spring 50 is coordinated with the frame 90 and serves as an installation direction mark, which facilitates the assembly operation and prevents the assembly direction of the upper spring 50 from being misplaced.

The lens driving motor of the present invention further includes a flexible circuit board 100, and the flexible circuit board 100 is disposed on a side wall of the housing 10 and protrudes from the inside of the housing 10 (refer to fig. 1).

As shown in fig. 8, the side wall of the housing 10 from which the flexible wiring board 100 is drawn serves as the mounting and positioning surface 12, the sub-magnets 40 are not provided at the mounting and positioning surface 12, and the flexible wiring board 100 is entirely located at the mounting and positioning surface 12. That is, the installation and positioning surface 12 is located on one side of the no-sub magnet 40, which facilitates installation and positioning.

As shown in fig. 1 and 8, the side wall of the housing 10 from which the flexible wiring board 100 is led out serves as the installation and positioning surface 12, the sub-magnets 40 are not provided at the installation and positioning surface 12, the side wall of the housing 10 adjacent to the installation and positioning surface 12 serves as the terminal leading-out surface 13, and the flexible wiring board 100 is led out from the installation and positioning surface 12, bent and extended along the terminal leading-out surface 13. This facilitates installation and in particular application to dual camera motors.

Of course, the terminal extraction surface 13 may be located on the same side as the mounting and positioning surface 12.

It should be noted that the specific shape of the flexible circuit board 100 is not limited to the shape shown in fig. 8, and various modifications and variations can be made to the same function and effect.

In order that the invention may be better understood, several aspects may be described.

A. The upper spring 50 is for non-square reasons: in this embodiment, the lens driving motor is square, the mounting and positioning surface 12 of the lead-out flexible circuit board 100 is located on the inner side wall of the housing 10, and the mounting and positioning surface 12 of the lead-out flexible circuit board 100 has a certain thickness and occupies a part of the space of the housing 10, so the shape of the square needs to be adjusted for avoiding the part of the space by the upper spring 50, which is only close to the square, but not strictly speaking, the square.

B. The presence of the first fool-proof structure 51 and the second fool-proof structure 91 means: the misloading of the upper spring 50 in the same direction due to the small length and width can be prevented. If the arrangement positions of the first fool-proof structure 51 and the second fool-proof structure 91 are further improved so as to be arranged at the center point position deviating from the side where the first fool-proof structure and the second fool-proof structure are arranged, the situation of misloading of the front side and the back side of the upper spring 50 can be further prevented. Therefore, the deviation of the first fool-proof structure 51 and the second fool-proof structure 91 from the center point position has a more remarkable meaning.

C. Assuming that the housing 10 is made non-square and the upper spring 50 is made square, the arrangement of the first fool-proof structure 51 and the second fool-proof structure 91 is still necessary at this time. In this case, although there is no need to worry about the possibility of incorrect assembly of the same-face upward spring 50, the reverse assembly of the same-face upward spring is still present, so that the first fool-proof structure 51 and the second fool-proof structure 91 are disposed at positions away from the center point, and the fool-proof function and effect thereof are still present.

D. Optionally, the positions of the first fool-proof structure 51 and the second fool-proof structure 91 may be further subjected to a dispensing treatment, so that the adhesive strength between the upper spring 50 and the frame 90 is enhanced on the original basis, which has great advantages for the impact resistance of dropping and the like, and avoids the phenomenon that the upper spring 50 floats in the process.

As shown in fig. 1, the lens driving motor further includes a lower spring 60 and a base 70 positioned below the lens support body 20. The lower spring 60 is used for supporting the lower end surface of the lens support body 20, the housing 10 is arranged on the base 70 to form a containing space therebetween, and the lens support body 20, the coil 30, the frame 90, the upper spring 50, the lower spring 60 and the magnet assembly are all located in the containing space, wherein the housing 10 and the base 70 are assembled together through a jogged structure. The base 70 is used for supporting the lens support body 20, the coil 30 and the lower spring 60, and provides a containing space for the lens support body 20, the coil 30, the frame 90, the upper spring 50, the lower spring 60 and the magnet assembly under the combined action of the base 70 and the housing 10, and meanwhile, the function of protecting the internal assembly can be achieved; in addition, the shell 10 and the base 70 are assembled together through the embedded structure, so that the structure is simple, the operation is convenient, the assembly effect is good, and the reliability and the stability are strong.

In addition, the pair of sub magnets are disposed 180 degrees opposite to each other, when current is applied to the coil 30, electromagnetic force is generated between the coil 30 and the magnet assembly, and according to the franking left hand rule, the lens support 20 is driven to linearly move along the optical axis direction of the lens due to the electromagnetic force, and the lens support 20 finally stays at a position point when the resultant force of the electromagnetic force generated between the coil 30 and the magnets and the elastic force of the upper spring 50 and the lower spring 60 reaches an equilibrium state. By applying a predetermined current to the coil 30, the lens support 20 can be controlled to move to the target position, thereby achieving the focusing purpose.

In the embodiment shown in fig. 2 and 9, the base 70 has a central relief opening 71 for engagement with the lens support 20.

As shown in fig. 2 and 9, the fitting structure includes a notch portion 81 and a boss portion 82, the notch portion 81 being provided on the housing 10, the boss portion 82 being provided on the outer periphery of the base 70 and being capable of fitting in the notch portion 81. The protruding portion 82 and the notch portion 81 are simple in structure, can meet the requirement of embedding, and are good in assembly effect, and high in reliability and stability.

In the particular embodiment shown in fig. 2, the notch 81 is located at the top corner of the housing 10. In this way, adverse effects on other components can be avoided, which is beneficial to improving the usability of the lens driving motor.

In the specific embodiment shown in fig. 12, the sub-magnets 40 are arranged in a polar manner as shown in the figure. Of course, the arrangement may be made in the manner shown in fig. 13. At this time, for the setting schemes of the two polar positions, the effect of the action of the forces of the same driving directions of the two schemes can be realized by reversely connecting the positive electrode and the negative electrode of the terminal pin of one scheme.

Example two

The difference from the first embodiment is that the present embodiment provides a lens driving motor assembly.

Specifically, the lens driving motor assembly includes a plurality of lens driving motors, and no sub-magnet 40 is provided in a side where two adjacent lens driving motors are close to each other. Thus, the magnetic field interference between the two can be effectively avoided.

Specifically, a Yu Shuang camera motor was applied.

That is, there are two lens driving motors, the two lens driving motors are arranged in parallel, and each lens driving motor is provided with two sub magnets 40, and the two sub magnets 40 are respectively located in a group of side walls of the lens driving motors which are oppositely arranged.

As shown in fig. 14, considering the structure of the double-shot motor, the flexible wiring board 100 is drawn out on the same side of the housing, so that the structure of the plurality of lens driving motors is the same, and the double-shot motor has good versatility.

Of course, the extraction position of the flexible wiring board 100 may be adjusted.

In theory, the shielding effect of the low magnetic permeability material on the magnetic field is less ideal, and the magnetic leakage prevention effect is poor. In order to avoid interference of magnetic fields between the 2 lens driving motors, it is desirable that the housing 10 of the dual-shot motor be made of a high magnetic permeability material. However, it is considered that if the entire housing 10 is made of a highly magnetically permeable material, the magnetic field of the sub-magnet 40 is also pulled and absorbed to some extent to other portions of the housing within the magnetic field region, so that the magnetic field strength of the magnetic field acting on the coil 30 is dispersed and weakened to some extent, and the driving force of the lens driving motor cannot be optimally exerted. Therefore, the high magnetic permeability material has magnetic field shielding and anti-interference effects, but cannot be considered to exert the optimum driving effect of the lens driving motor. Therefore, the portion of the housing 10 corresponding to the sub-magnet 40 is set to be a high magnetic permeability material, and the rest of the housing 10, which may interfere with or weaken the exertion of electromagnetic force, is selected to be a low magnetic permeability material, so that the driving force and anti-magnetic interference effect of the dual-camera motor are optimized to be a more ideal state.

In fact, the overall structure and implementation of the lens driving motor presents a variety and complexity, and the choice of materials for the housing 10 must be chosen and assembled in consideration of various factors.

It should be noted that the flexible circuit board is adopted in the invention, and a conventional rigid terminal structure integrally formed with the base is not needed, because one side of the position of the sub-magnet needs to be avoided, but the double-camera motor is considered, and how to conveniently electrify the terminal pins after being arranged together. Therefore, the problem of compatibility can be solved by adopting the flexible circuit board, so that the installation positioning surface of the flexible circuit board is arranged on the side without the sub-magnets, and the terminal extraction surface is extracted to the side with the sub-magnets. The invention can also be used in the case of a single-shot motor, or the flexible circuit board is arranged on the same side, or the flexible circuit board is modified into a rigid terminal type structure.

The invention provides a lens driving motor with large driving force through the selection of a shell composite material, a multipolar magnetizing mode of a sub-magnet and a plurality of groups of coils configured with the magnetizing mode, and the invention can apply a Yu Shuang camera motor and can effectively solve the problem of mutual magnetic interference among the lens driving motors.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

1. the sub magnets 40 are magnetized by adopting multipoles, so that the magnetic interference phenomenon of the double-shot motor is effectively avoided;

2. the housing 10 of high magnetic permeability material effectively enhances the driving force of the lens driving motor;

3. creating favorable conditions for the arrangement of the lens driving motor with further miniaturization and thinness;

4. because the magnetic field intensity of the magnet assembly is increased, the lens can be driven to reach the designated position point by applying smaller current, a low-current motor can be developed, and the power consumption of the mobile phone is reduced;

5. the lens driving motor has simple structure and convenient processing and assembly.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens driving motor, characterized by comprising a housing (10), a lens support body (20), a coil (30) and a magnet assembly, wherein the coil (30) is wound on the lens support body (20) and is arranged in the housing (10), and the magnet assembly is arranged between the lens support body (20) and the housing (10), wherein the magnet assembly comprises a plurality of sub magnets (40), and the sub magnets (40) are multipolar magnetizing magnets; the sub-magnets (40) are quadrupole magnetizing magnets, and the middle parts of the sub-magnets (40) are provided with non-magnetic areas (41); the coils (30) are two groups, the two groups of coils (30) are wound on the lens support body (20) and are arranged at intervals in the height direction of the lens support body (20), one group of coils (30) is arranged corresponding to the upper side part of the nonmagnetic region (41), and the other group of coils (30) is arranged corresponding to the lower side part of the nonmagnetic region (41); the shell (10) is made of a first material at a position corresponding to the position where the sub-magnet (40) is arranged; the housing (10) is made of a second material at a position where the sub-magnets (40) do not correspond to each other, and the magnetic permeability of the first material is higher than that of the second material.

2. The lens driving motor according to claim 1, wherein the height of the nonmagnetic region (41) is 0.2 mm or more and 0.5 mm or less.

3. A lens driving motor according to claim 1, wherein the lens support body (20) has a spacer rib (21) for spacing the two sets of coils (30).

4. The lens driving motor according to claim 1, wherein a height of an upper portion of the nonmagnetic region (41) is greater than a height of a lower portion of the nonmagnetic region (41).

5. The lens driving motor according to any one of claims 1 to 4, characterized in that the upper end face of the lens support body (20) further has a socket recess (22) which is socket-fitted with the flange (11) of the housing (10), the socket recess (22) being in the shape of a closed-around recess.

6. The lens driving motor according to any one of claims 1 to 4, wherein the lens support body (20) further has a stopper (23) protruding toward the sub-magnet (40), a side surface of the stopper (23) toward the sub-magnet (40) being a stopper surface (231), the stopper surface (231) being stopper-fitted with the sub-magnet (40) to prevent the lens support body (20) from being deflected.

7. The lens driving motor according to any one of claims 1 to 4, wherein a logo structure (42) is provided at a corner of the sub-magnet (40).

8. The lens driving motor according to claim 7, wherein the index structure (42) is a unfilled corner provided at a corner of the sub-magnet (40).

9. The lens driving motor according to any one of claims 1 to 4, wherein a plurality of the sub magnets (40) are respectively provided in a set of oppositely disposed side walls of the housing (10).

10. The lens driving motor according to claim 1, wherein,

the first material is SUS400 series or SPCC; and/or

The second material is SUS305.

11. The lens driving motor according to any one of claims 1 to 4, characterized in that the lens driving motor further comprises:

an upper spring (50), the upper spring (50) being provided with a first fool-proof structure (51);

frame (90), frame (90) are provided with the second and prevent slow-witted structure (91), first prevent slow-witted structure (51) with the cooperation of second prevents slow-witted structure (91) makes go up spring (50) with frame (90) are installed in place, go up spring (50) with frame (90) all are located in shell (10).

12. The lens driving motor according to claim 11, wherein the first fool-proof structure (51) is located on an outer ring side of the upper spring (50).

13. The lens driving motor according to claim 11, wherein the first fool-proof structure (51) is a positioning socket provided on the upper spring (50); the second fool-proof structure (91) is a positioning protrusion arranged on the frame (90), and the positioning protrusion can be embedded into the positioning socket.

14. The lens driving motor according to any one of claims 1 to 4, further comprising a flexible wiring board (100), the flexible wiring board (100) being provided on a side wall of the housing (10) and protruding from inside the housing (10) to outside.

15. The lens driving motor according to claim 14, wherein a side wall of the housing (10) from which the flexible wiring board (100) is led out is used as a mounting positioning surface (12), the sub-magnets (40) are not provided at the mounting positioning surface (12), and the flexible wiring board (100) is entirely located at the mounting positioning surface (12).

16. The lens driving motor according to claim 14, wherein a side wall of the housing (10) from which the flexible wiring board (100) is led out is a mounting positioning surface (12), the sub-magnet (40) is not provided at the mounting positioning surface (12), a side wall of the housing (10) adjacent to the mounting positioning surface (12) is a terminal lead-out surface (13), and the flexible wiring board (100) is bent after being led out from the mounting positioning surface (12) and extends along the terminal lead-out surface (13).

17. A lens driving motor assembly, characterized by comprising the lens driving motor according to any one of claims 1 to 16, a plurality of said lens driving motors, and no sub-magnet (40) in a side where two adjacent said lens driving motors are close to each other.

18. The lens driving motor assembly according to claim 17, wherein the number of the lens driving motors is two, the two lens driving motors are arranged in parallel, and each lens driving motor is provided with two sub magnets (40), and the two sub magnets (40) are respectively positioned in a group of side walls opposite to each other of the lens driving motors.

19. A camera, comprising:

the lens driving motor of any one of claims 1 to 16; or alternatively

The lens driving motor assembly as claimed in claim 17 or 18.

20. A mobile terminal device comprising the camera of claim 19.

21. The mobile terminal device according to claim 20, characterized in that the mobile terminal device comprises a portable information terminal.

22. The mobile terminal device according to claim 21, wherein the information carrying terminal includes at least one of a cellular phone and a notebook computer.