CN114157789B - Lens driving assembly, camera module and electronic equipment - Google Patents
Lens driving assembly, camera module and electronic equipment Download PDFInfo
- Publication number
- CN114157789B CN114157789B CN202111448322.9A CN202111448322A CN114157789B CN 114157789 B CN114157789 B CN 114157789B CN 202111448322 A CN202111448322 A CN 202111448322A CN 114157789 B CN114157789 B CN 114157789B
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- printed coil
- coil
- magnetic
- driving assembly
- printed
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- 238000003384 imaging method Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005476 soldering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
The application provides a lens driving assembly, a camera module and electronic equipment, wherein the lens driving assembly comprises a base, a movable frame body and a carrier, the movable frame body comprises a magnetic piece which is arranged around the carrier, and the magnetic piece comprises a first magnet group and a second magnet group; the first magnet sets are oppositely arranged at two sides of the movable frame body, the second magnet sets are oppositely arranged at the other two sides of the movable frame body, and the magnetic force of the first magnet sets is different from that of the second magnet sets; the base is provided with a printed circuit board, the printed circuit board is provided with a printed coil at a position corresponding to the magnetic piece, the printed coil comprises a first printed coil and a second printed coil, the first printed coil is correspondingly arranged at the lower end of a group of magnetic pieces with small magnetic force, the second printed coil is arranged at the lower end of a group of magnetic pieces with large magnetic force, and the number of turns of the first printed coil is larger than that of the second printed coil. The lens driving assembly provided by the application can effectively ensure the stability of the anti-shake performance under the condition that the magnetic force of the magnetic parts is different.
Description
Technical Field
The application relates to the technical field of voice coil motors, in particular to a lens driving assembly, a camera module and electronic equipment.
Background
With the rapid development of the camera industry, products equipped with cameras, including mobile phone cameras, IPAD cameras and the like, become indispensable equipment in life of people.
In the shooting process using a camera-equipped product, the anti-shake function in the shooting process is usually completed by a voice coil driving assembly (VCM), and the voice coil motor has the characteristics of high frequency response and high precision. The main principle is that in a permanent magnetic field, the movable frame, the carrier and the lens fixed on the carrier are driven to move radially by changing the direct current of the coil in the motor, so that the anti-shake function is realized.
In the prior art, due to the fact that the functions and the shapes of the VCM are required to be supplied by suppliers, in part of cases, due to the limitation of the shapes, the sizes of the magnets used for driving the X-axis direction and the Y-axis direction are different, magnetic forces in the XY-axis direction are different, and then the moving speeds of the X-axis direction and the Y-axis direction are different in the process of adjusting imaging, so that the actual anti-shake effect is affected.
Disclosure of Invention
The present application is directed to a lens driving assembly, a camera module and an electronic device, which at least solve the above-mentioned drawbacks of the prior art.
The application provides a lens driving assembly, which comprises a base, a movable frame body arranged on the base and a carrier arranged in the movable frame body, wherein the movable frame body comprises a magnetic piece arranged around the carrier, and the magnetic piece comprises a first magnet group and a second magnet group;
the first magnet sets are oppositely arranged on two sides of the movable frame body, the second magnet sets are oppositely arranged on the other two sides of the movable frame body, and the magnetic force of the first magnet sets is different from that of the second magnet sets;
the magnetic part is characterized in that a printed circuit board is arranged on the base, a printed coil is arranged at the position corresponding to the magnetic part, the printed coil comprises a first printed coil and a second printed coil, the first printed coil is correspondingly arranged at the lower end of the magnetic part in a group with small magnetic force, the second printed coil is arranged at the lower end of the magnetic part in a group with large magnetic force, and the number of turns of the first printed coil is larger than that of the second printed coil.
In addition, the lens driving assembly according to the present application has the following additional technical features:
further, the effective length of the first printed coil is greater than the effective length of the second printed coil.
Furthermore, the corners of the base are provided with limiting protrusions, and the printed circuit board is provided with notches matched with the limiting protrusions.
Further, the printed coil comprises a coil which is arranged in a strip-shaped surrounding mode and a contact extending from the end portion of the coil, and the printed coil is electrically connected with the lower elastic sheet through the contact.
Further, the lower elastic sheet and the upper elastic sheet comprise an outer mounting frame and an inner mounting ring, the outer mounting frame and the inner mounting ring are connected through an extension line, and the outer mounting frame and the inner mounting ring which are positioned on the lower elastic sheet are respectively arranged on the inner side and the outer side of the magnetic piece.
Further, a clamping groove matched with the magnetic piece is formed in the inner side of the movable frame body, and a limiting block is arranged on one side, close to the carrier, of the clamping groove.
Further, the outer mounting frame and the mounting inner ring of the upper elastic sheet and the lower elastic sheet are respectively provided with an assembly hole, and the outer mounting frame and the mounting inner ring are respectively fixed on the movable frame body and the carrier through the assembly holes.
The application also provides a camera module, which comprises a lens, an imaging sensor and the driving component;
the imaging sensor is arranged on one side of the base away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.
The application also provides electronic equipment comprising the camera module.
Compared with the prior art, the application has the beneficial effects that: the printed coils with relatively few coil turns are arranged below the magnetic pieces with large magnetic force and the printed coils with relatively more coil turns are arranged below the magnetic pieces with small magnetic force, so that the problem that the radial (along the X axis and along the Y axis) movement speed of the lens is inconsistent due to the magnetic force difference of the magnetic pieces is solved.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
FIG. 1 is an exploded view of a lens driving assembly according to an embodiment of the present application;
fig. 2 is a schematic structural view of a printed circuit board according to a first embodiment of the present application;
FIG. 3 is a schematic view of a base in a first embodiment of the present application;
FIG. 4 is a schematic structural diagram of an upper spring plate according to a first embodiment of the present application;
FIG. 5 is a schematic structural diagram of a lower spring plate according to a first embodiment of the present application;
fig. 6 is a schematic structural diagram of a printed circuit board in a lens driving assembly according to a second embodiment of the present application.
Description of the main reference signs
| Base seat | 10 | Movable frame | 20 |
| Spacing bump | 11 | Positioning column | 12 |
| First magnet group | 21 | Second magnet group | 22 |
| Carrier body | 30 | Upper spring plate | 40 |
| Outer mounting frame | 41 | Inner ring for installation | 42 |
| Extension line | 43 | Assembly hole | 44 |
| Lower spring plate | 50 | Printed circuit board | 60 |
| First printed coil | 61 | Second printed coil | 62 |
| Notch | 63 | Positioning hole | 64 |
| Contact point | 65 |
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Several embodiments of the application are presented in the figures. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, 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. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the present application, the X-direction, the Y-direction and the Z-direction form a virtual coordinate system, the Z-direction is the axial direction of the base 10, the X-direction and the Y-direction are perpendicular to each other and form a horizontal plane, and the horizontal plane is perpendicular to the axial direction of the base 10, wherein the X-direction is the transverse direction of the horizontal plane, and the Y-direction is the longitudinal direction of the horizontal plane.
Example 1
In this embodiment, a lens driving assembly is provided to solve the problem that in the prior art, the shape limitation in the VCM causes the driving carrier to be different along the X-axis and the Y-axis magnets, which affects the focusing efficiency.
Referring to fig. 1 to 5, a lens driving assembly according to an embodiment of the application is shown. In the three-dimensional XYZ rectangular coordinate system, the lens driving assembly includes a base 10, a movable frame 20 disposed on the base 10, and a carrier 30 disposed in the movable frame 20, and further includes an upper spring 40 and a lower spring 50 disposed at upper and lower ends of the carrier, the movable frame 20 includes a magnetic member disposed around the carrier 30, and the magnetic member includes a first magnet group 21 and a second magnet group 22;
wherein the first magnet group 21 is disposed on two sides of the movable frame 20, the second magnet group 22 is disposed on two other sides of the movable frame 20, and the first magnet group 21 and the second magnet group 22 are different in size, specifically, in this embodiment, the length of the first magnet group 21 is shorter than the length of the second magnet group 22. The magnetic force of the first magnet group 21 is thus different from the magnetic force of the second magnet group 22.
The base 10 is provided with a printed circuit board 60, the printed circuit board 60 is provided with a printed coil at a position corresponding to the magnetic piece, the printed coil comprises a first printed coil 61 and a second printed coil 62, the first printed coil 61 is correspondingly arranged at the lower end of a group of magnetic pieces (namely, a first magnet group 21) with small magnetic force, the second printed coil 62 is arranged at the lower end of a group of magnetic pieces (namely, a second magnet group 22) with large magnetic force, and the number of turns of the first printed coil 61 is larger than that of the second printed coil 62.
It should be noted that, when the printed coil receives an applied current (the triggering form of the current may be formed according to signal data fed back by a gyroscope or triggering conditions of other shake determination), the magnetic element disposed above the corresponding printed coil generates electromagnetic force according to a left-hand rule, so as to drive the movable frame 20 and the carrier 30 to move in the X-axis direction or the Y-axis direction, thereby realizing the shake prevention function of the lens.
It will be appreciated that, in this embodiment, since the length of the first magnet set 21 is shorter than the length 22 of the second magnet set, the magnetic force of the first magnet set 21 is also smaller than that of the second magnet set 22, and in the case that the applied currents are the same, there must be a larger force in the direction of the larger magnetic force than in the direction of the smaller magnetic force. The application neutralizes acting force by arranging printed coils with different turns under the magnetic piece, and particularly by arranging a first printed coil 61 with fewer turns under a first magnet group 21 with large magnetic force; a second printed coil 62 having a large number of coil turns is provided below the second magnet group 22 having a small magnetic force; and the magnetic piece with small magnetic force is matched with the printed coil with more turns, and the magnetic piece with large magnetic force is matched with the printed coil with less turns, so that the acting force of the X-axis and the Y-axis generated under the current condition with the same size is similar or the same finally. And further, the problem of poor anti-shake effect caused by different magnetic forces of the magnets is solved.
Referring to fig. 2 to 3, in the present embodiment, in order to enable the printed circuit board 60 to have good fixing and alignment effects, the printed coil is aligned with the magnetic element, and the printed circuit board 60 is well fixed on the base 10. In this embodiment, the limiting protrusion 11 is disposed at the corner of the base 10, and the printed circuit board 60 is provided with a notch 63 matching with the limiting protrusion 11. The printed coil and the magnetic piece are aligned by matching the limit protrusion 11 with the notch 63.
In addition, still be equipped with three locating hole 64 on the printed circuit board 60, be equipped with on the base 10 with the reference column 12 that the locating hole 64 corresponds to make printed circuit board 60 realize good fixed assembly effect through the spacing structure of cooperation spacing arch 11 and breach 63, and assemble simple structure through this mode, the product equipment shaping is convenient.
Further, in this embodiment, the printed coil includes a coil that is disposed in a strip-shaped surrounding manner and a contact 65 that extends from an end of the coil, and the printed coil is electrically connected to the lower spring plate 50 by soldering through the contact 65. The coil end is provided with the contact to increase the contact area, so that the electric connection stability effect with the lower spring piece 50 is ensured, and the phenomena of cold joint and off-joint are avoided in the soldering process.
Please refer to fig. 4 to 5, which are schematic structural diagrams of the upper elastic sheet 40 and the lower elastic sheet 50 respectively, as shown in the drawings, the lower elastic sheet 50 and the upper elastic sheet 40 each include an outer mounting frame 41 and an inner mounting ring 42, the outer mounting frame 41 and the inner mounting ring 42 are connected through an extension line 43, specifically, the outer mounting frame 41 and the edge of the movable frame are in a profile modeling arrangement, and the inner mounting ring 42 is located on the outer mounting frame 41 and the inner mounting ring 42 of the lower elastic sheet 50 respectively and are disposed on the inner and outer sides of the magnetic member. According to the application, the outer mounting frame 41 of the lower elastic sheet 50 and the mounting inner ring 42 are distributed on the inner side and the outer side of the magnetic pieces, and the extension line 43 is arranged between the two adjacent magnetic pieces, so that a space corresponding to the printed coil is reserved for the magnetic pieces, the assembly difficulty is simplified, and meanwhile, the cross interference of the line body is avoided.
In addition, the outer mounting frame 41 and the mounting inner ring 42 are respectively provided with a mounting hole 44, and the outer mounting frame 41 and the mounting inner ring 42 are respectively fixed on the movable frame body 20 and the carrier 30 through the mounting holes 44. The outer mounting frame 41 and the mounting inner ring 42 are partially fixed through the mounting holes 44, so that the alignment effect of the upper elastic sheet 40 and the lower elastic sheet 50 is ensured, and meanwhile, the profile has a certain degree of elastic performance due to the characteristics of the profile.
Example two
Referring to fig. 6, a lens driving assembly according to a second embodiment of the present application is shown, wherein the lens driving assembly according to the present embodiment is different from the lens driving assembly according to the first embodiment in that: the effective length of the first printed coil 61 is longer than the effective length of the second printed coil 62.
It can be appreciated that the purpose of such a design is to set up the long printed coil of effective length through the magnetism spare below that magnetic force is little for finally receive the effort that the electric current generated to receive the effective length of printed coil and coil turns control, make when finally debugging camera lens anti-shake function, the effort along X axial and Y axial accessible two control parameter synchronization regulation, so that finally along X axial effort and along Y axial effort more closely.
Example III
The application also provides a camera module, which comprises a lens, an imaging sensor and the driving component;
the imaging sensor is arranged on one side of the base away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.
Example IV
The application also provides electronic equipment comprising the camera module.
In summary, in the lens driving assembly, the camera module and the electronic device according to the above embodiments of the present application, compared with the prior art, the lens driving assembly of the present application is provided with the first printed coil 61 with a small number of turns under the first magnet group 21 with a large magnetic force; a second printed coil 62 having a large number of coil turns is provided below the second magnet group 22 having a small magnetic force; and the magnetic piece with small magnetic force is matched with the printed coil with more turns, and the magnetic piece with large magnetic force is matched with the printed coil with less turns, so that the acting force of the X-axis and the Y-axis generated under the current condition with the same size is similar or the same finally. Further, the problem of poor anti-shake effect caused by different magnetic forces of the magnets is solved; in addition, the matching of the positioning holes 64 and the positioning columns 12 and the matching of the limiting protrusions 11 and the notches 63 optimize the correspondence and fixation of the printed circuit board 60; the electrical connection stability effect is optimized by arranging the extended contact 65 at the coil end of the printed coil and electrically connecting the lower spring plate 50; and the effective length of the printed coil is set so as to further improve the regulation and control performance on the anti-shake capacity.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. The lens driving assembly is characterized by comprising a base, a movable frame body arranged on the base and a carrier arranged in the movable frame body, wherein the movable frame body comprises a magnetic piece arranged around the carrier, and the magnetic piece comprises a first magnet group and a second magnet group;
the first magnet sets are oppositely arranged on two sides of the movable frame body, the second magnet sets are oppositely arranged on the other two sides of the movable frame body, and the magnetic force of the first magnet sets is different from that of the second magnet sets;
the base is provided with a printed circuit board, the printed circuit board is provided with a printed coil at a position corresponding to the magnetic piece, the printed coil comprises a first printed coil and a second printed coil, the first printed coil is correspondingly arranged at the lower end of a group of magnetic pieces with small magnetic force, the second printed coil is arranged at the lower end of a group of magnetic pieces with large magnetic force, and the number of turns of the first printed coil is larger than that of the second printed coil;
the effective length of the first printed coil is greater than the effective length of the second printed coil.
2. The lens driving assembly according to claim 1, wherein a limit protrusion is arranged at a corner of the base, and the printed circuit board is provided with a notch matched with the limit protrusion.
3. The lens driving assembly according to claim 1, wherein the printed coil comprises a coil which is arranged in a strip-shaped surrounding manner and a contact extending from the end of the coil, and the printed coil is electrically connected with the lower spring plate through the contact.
4. A lens driving assembly according to claim 3, wherein the lower spring and the upper spring each comprise an outer mounting frame and an inner mounting ring, the outer mounting frame and the inner mounting ring are connected by an extension line, and the outer mounting frame and the inner mounting ring located on the lower spring are respectively disposed on the inner side and the outer side of the magnetic member.
5. The lens driving assembly according to claim 4, wherein the outer mounting frame and the mounting inner ring of the upper spring plate and the lower spring plate are respectively provided with mounting holes, and the outer mounting frame and the mounting inner ring are respectively fixed on the movable frame and the carrier through the mounting holes.
6. The lens driving assembly according to claim 1, wherein a clamping groove matched with the magnetic piece is formed in the inner side of the movable frame body, and a limiting block is arranged on one side, close to the carrier, of the clamping groove.
7. The lens driving assembly according to claim 1, wherein the printed circuit board is provided with a plurality of positioning holes, and the base is provided with positioning columns corresponding to the positioning holes.
8. A camera module comprising a lens, an imaging sensor, and the lens drive assembly of any one of claims 1 to 7;
the imaging sensor is arranged on one side of the base away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.
9. An electronic device comprising the camera module of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111448322.9A CN114157789B (en) | 2021-11-30 | 2021-11-30 | Lens driving assembly, camera module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111448322.9A CN114157789B (en) | 2021-11-30 | 2021-11-30 | Lens driving assembly, camera module and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114157789A CN114157789A (en) | 2022-03-08 |
| CN114157789B true CN114157789B (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111448322.9A Active CN114157789B (en) | 2021-11-30 | 2021-11-30 | Lens driving assembly, camera module and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114157789B (en) |
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| Publication number | Publication date |
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| CN114157789A (en) | 2022-03-08 |
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