CN112415708A - Anti-shake focusing motor and application module thereof - Google Patents
Anti-shake focusing motor and application module thereof Download PDFInfo
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- CN112415708A CN112415708A CN202011397648.9A CN202011397648A CN112415708A CN 112415708 A CN112415708 A CN 112415708A CN 202011397648 A CN202011397648 A CN 202011397648A CN 112415708 A CN112415708 A CN 112415708A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
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Abstract
The invention relates to the technical field of camera modules, and particularly discloses an anti-shake focusing motor and an application module thereof, wherein the motor comprises a fixing structure, a suspension wire, an anti-shake structure and a focusing structure, and the fixing structure comprises a positioning seat and a shell; one end of the suspension wire is connected with the fixed structure; the anti-shake structure comprises a sensor carrier, at least one group of anti-shake magnets and at least two groups of anti-shake coils, the anti-shake magnets are fixed inside the shell, the sensor carrier is movably arranged at the lower part inside the shell, and the anti-shake coils are arranged on the sensor carrier; the anti-shake structure is connected with the other end of the suspension wire; the focusing structure is arranged on the sensor carrier and comprises a lens carrier, at least one group of focusing magnets and at least one group of focusing coils, and the focusing coils are arranged on the periphery of the lens carrier. The invention has no nonlinear friction force in the anti-shake process and better anti-shake effect.
Description
Technical Field
The invention relates to the technical field of camera modules, in particular to an anti-shake focusing motor and an application module thereof.
Background
In recent years, small-sized mobile devices with shooting functions are quite popular, and the application range is also continuously expanded, wherein the small-sized mobile devices comprise smart phones, smart glasses, sports cameras, law enforcement recorders and automobile data recorders. The device comprises at least one zoom (zoom), Auto-Focus (Auto-Focus) or Fixed-Focus (Fixed-Focus) miniature camera module. Therefore, the market of the module is huge, and the growth is steadily promoted.
When taking pictures and films, the pictures and films taken by the device are likely to appear blurred or swayed due to external vibration, which affects the quality of the pictures and films. This problem is exacerbated when the vibrations are relatively intense, or in low light conditions.
In order to solve the above problems, many different anti-shake technologies have appeared on the market. In the existing mainstream technology, the effect of improving image quality is achieved by reading a vibration sensor (such as a gyroscope and an acceleration sensor), calculating a vibration waveform and a required compensation angle, and compensating image blurring and shaking caused by vibration through an electronic, optical or mechanical method.
The prior art may be classified into four categories according to a vibration compensation method, including Electronic Image Stabilizer (EIS), Optical Image Stabilizer (OIS), translational Sensor anti-vibration (SSS), and anti-vibration cradle head (GS). EIS, OIS, SSS and GS have different advantages and disadvantages.
EIS achieves anti-shake effect by electronic means. During shooting, the EIS adjusts the position of each frame of image according to the calculated vibration waveform to counteract the image shake caused by vibration. Since the EIS does not require an additional actuator, the main advantage of the EIS is low cost, without additional weight and volume.
The OIS is an Optical and mechanical method, in which an actuator is used to move an Optical component, so that a relative motion occurs between the Optical component and an Image sensor, and the Optical Path (Optical Path) and the position of an Image Circle (Image Circle) are changed to cancel Image shaking caused by vibration. Since the OIS is continuously performing the optical anti-shake compensation during each frame of image, it can counteract the shake during each frame of image exposure, and achieve better image quality than the EIS.
The SSS mechanically moves the image sensor by an actuator, so that relative movement between the optical component and the image sensor occurs, and image shake caused by vibration is counteracted. The SSS has the optical anti-shake principle and effect similar to that of OIS, and can counteract the shake during each frame of image exposure, thereby achieving better image quality than EIS. Compared with the OIS, the SSS does not need to move a heavier lens or lens in the anti-shake process, so that the high-frequency anti-shake device has great advantages in terms of high-frequency anti-shake effect and power consumption. In addition, the SSS can compensate for Roll (Roll) shake that the OIS cannot compensate for, so that up to 5-axis shake prevention can be achieved, more than the highest 4-axis shake prevention of the OIS.
The main stream GS drives the entire camera module including the lens and the image sensor by a mechanical method to make a motion having a direction opposite to the vibration direction but an amplitude close to the vibration direction, so as to cancel the shake caused by the vibration. In the anti-shake process, because there is no relative motion between the optical component and the image sensor, the image quality and the anti-shake effect will not decrease at the edge of the image, and there is no need to maintain the partial optical resolution of the lens and the partial resolution of the image sensor. Therefore, the anti-shake effect and image quality of the main stream anti-shake cradle head are better than EIS, OIS and SSS.
In summary, it can be seen that the conventional camera module devices in the market all have respective problems, and the prior art cannot overcome the disadvantages of the conventional camera module devices by integrating the advantages of the camera module devices.
Disclosure of Invention
The invention aims to provide an anti-shake focusing motor and an application module thereof, which have the advantages of good anti-shake effect, low production difficulty, low cost, low volume, low power consumption and the like, and can support rolling anti-shake and automatic focusing functions.
In order to solve the above technical problems, the present invention provides an anti-shake focusing motor, including:
the fixing structure comprises a positioning seat and a shell; the positioning seat is arranged at the upper part of the inner part of the shell;
one end of the suspension wire is connected with the fixed structure;
the anti-shake structure is connected with the other end of the suspension wire and comprises a sensor carrier, at least one set of anti-shake magnets and at least two sets of anti-shake coils, the anti-shake magnets are fixed inside the shell, the sensor carrier is movably arranged at the lower part inside the shell, the anti-shake coils are arranged on the sensor carrier, and the anti-shake coils and the anti-shake magnets are arranged correspondingly; the two groups of anti-shake coils are arranged side by side and are arranged opposite to one group of anti-shake magnets, the included angle of ampere force generated by the two groups of anti-shake coils is less than 20 degrees, and the sensor carrier can be controlled to perform rolling two-axis anti-shake motion;
the focusing structure is arranged on the sensor carrier and comprises a lens carrier, at least one group of focusing magnets and at least one group of focusing coils; the focusing magnet is fixedly arranged on the inner wall of the shell; the lens carrier at least has one spatial displacement freedom degree, the focusing coil is arranged on the periphery of the lens carrier, and the focusing coil and the focusing magnet are oppositely arranged.
Preferably, the housing is made of a magnetically conductive material.
Preferably, the shell is of a rectangular structure, at least two outer side walls of the shell are provided with grooves, the anti-shake magnets are arranged on the inner walls of the bottoms of the grooves in a one-to-one correspondence mode, and each group of the focusing magnets are arranged on the inner walls of the side portions of one groove in a corresponding mode.
Preferably, the anti-shake coils are provided with three groups, and the anti-shake magnets are provided with two groups; one group of anti-shake coils and one group of anti-shake magnets are arranged correspondingly, and the other two groups of anti-shake coils and the other group of anti-shake magnets are arranged oppositely; the sensor carrier may perform a three-axis anti-shake motion including roll.
Preferably, at least one group of the suspension wires is made of a conductive material, one end of each suspension wire is electrically connected with part or all of the anti-shake coil group, and the other end of each suspension wire is connected with a conductive structure in the fixing structure.
Preferably, the lens carrier comprises at least one group of focusing springs, and the focusing springs comprise two parallel spring pieces which are respectively arranged above and below the lens carrier.
In order to solve the above problems, the present invention further provides an application module of an anti-shake focusing motor, including any one of the above anti-shake focusing motors, further including:
the lens is arranged on the lens carrier;
the module shell is connected with the bottom end of the shell;
the sensor circuit board is arranged on the module shell and is respectively connected with the fixing structure and the anti-shake structure;
an image sensor disposed on the sensor circuit board.
Preferably, the sensor further comprises an optical filter, and the optical filter is connected with the bottom surface of the sensor carrier.
Preferably, the sensor circuit board includes a movable portion, an immovable portion, and an elastic portion, the movable portion and the immovable portion are connected by the elastic portion, the movable portion is connected with the fixed structure, and the immovable portion is connected with the positioning socket.
Preferably, soft material layers are respectively arranged between the anti-shake coil and the anti-shake magnet and between the movable part and the module shell.
The invention has the following beneficial effects:
(1) according to the anti-shake focusing motor and the application module thereof, the ampere force generated by the electrified anti-shake coil in the magnetic field of the anti-shake magnet is utilized to drive the anti-shake structure to move, the current direction of the anti-shake coil is controlled by combining an external or internal control driving chip, so that the vibration interference during shooting is counteracted to eliminate the image blur, the quality of an image or a film is improved, the anti-shake effect is remarkable, and the adjustment is rapid and stable; and the anti-shake coils and the anti-shake magnets can be combined in different quantities, so that the anti-shake function from two shafts to multiple shafts is realized.
(2) The anti-shake focusing motor and the application module thereof utilize the actuator driven by electromagnetic force, do not need a complex mechanical transmission structure, have the advantages of simple and compact structure, convenient assembly, small volume, light weight, low cost and low power consumption, and are beneficial to large-scale production and application.
(3) The anti-shake focusing motor and the application module thereof do not generate nonlinear friction force in the anti-shake process, and have better effect of coping with the vibration which is relatively fine and has frequently changed direction.
(4) The anti-shake focusing motor and the application module thereof can also drive the focusing structure by utilizing the ampere force generated by the electrified focusing coil in the magnetic field of the focusing magnet, and control the current direction of the focusing coil by combining with an external control driving chip, thereby realizing the automatic focusing function of the lens and realizing rapid and accurate focusing.
Drawings
Fig. 1 is a schematic structural diagram of an anti-shake focusing motor and an application module thereof according to an embodiment of the present invention;
FIG. 2 is an exploded view of an anti-shake focusing motor and an application module thereof according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an anti-shake focusing motor and an application module thereof according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of one configuration of a sensor circuit board;
FIG. 5 is another exploded view of the anti-shake focusing motor and the module applied thereto according to the embodiment of the present invention;
fig. 6 is a schematic top view of a housing according to an embodiment of the present invention.
Reference numerals: 1. a fixed structure; 101. positioning seats; 102. a housing; 103. a groove; 2. suspension of silk; 3. an anti-shake structure; 301. a sensor carrier; 302. an anti-shake coil; 303. an anti-shake magnet; 4. a focusing structure; 401. a lens carrier; 402. a focusing coil; 403. a focusing magnet; 5. a focusing spring; 501. parallel spring pieces; 6. a lens; 7. a module housing; 8. a sensor circuit board; 801. a movable portion; 8011. a movable connection portion; 802. an immovable part; 8021. a fixed connection part; 803. an elastic portion; 8031. a first connecting arm; 8032. a second connecting arm; 8033. a bending section; 9. an image sensor; 10. an optical filter; 11. a suspension wire circuit board.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, 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 in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1 to 3, a preferred embodiment of the present invention provides an anti-shake focusing motor and an application module thereof, including a fixing structure 1, a suspension wire 2, an anti-shake structure 3 and a focusing structure 4, where the fixing structure 1 includes a positioning seat 101 and a housing 102; the positioning seat 101 is installed at the upper part of the inside of the outer shell 102, and a conductive structure is arranged in the positioning seat 101; one end of the suspension wire 2 is connected with the conductive structure; the anti-shake structure 3 is connected with the other end of the suspension wire 2, the anti-shake structure 3 comprises a sensor carrier 301, at least one set of anti-shake magnets 303 and at least two sets of anti-shake coils 302, the anti-shake magnets 303 are fixed inside the shell 102, the sensor carrier 301 is movably mounted at the lower part inside the shell 102, the anti-shake coils 302 are arranged on the sensor carrier 301, and the anti-shake coils 302 are arranged corresponding to the anti-shake magnets 303; the anti-shake coil 302 is electrically connected with the conductive structure; the focusing structure 4 is disposed on the sensor carrier 301, and the focusing structure 4 includes a lens carrier 401, at least one set of focusing magnets 403, and at least one set of focusing coils 402; the focusing magnet 403 is fixedly arranged on the inner wall of the shell 102; the lens carrier 401 has at least one degree of freedom of spatial displacement, the focusing coil 402 is disposed at the periphery of the lens carrier 401, and the focusing coil 402 is disposed opposite to the focusing magnet 403; the focusing coil 402 is electrically connected to the conductive structure.
Wherein two sets of in anti-shake coil 302 the anti-shake coil sets up side by side to with one set of in anti-shake magnetite 303 the anti-shake magnetite sets up relatively, the ampere force that two sets of anti-shake coils produced is roughly parallel (contained angle is less than 20 °), can control the sensor carrier and carry out the diaxon anti-shake motion that contains the roll. When the directions and the magnitudes of the two ampere forces are consistent, the sensor carrier can move in an axial displacement mode; when the two amperes are in opposite directions but are of equal magnitude, the sensor carrier may undergo an axial tumbling motion.
Based on above-mentioned scheme, when shooing the anti-shake: the anti-shake coil 302 is electrified, the anti-shake structure 3 is driven to move by the ampere force generated by the electrified anti-shake coil 302 in the magnetic field of the anti-shake magnet 303, and the current direction and the magnitude of the anti-shake coil 302 are controlled by combining an external or internal control driving chip, so that the angle and the displacement of the anti-shake structure 3 are controlled, the vibration interference during shooting is counteracted, the image blur is eliminated, and the quality of the image or the film is improved; when the shooting is finished, the anti-shake coil 302 is powered off, and the anti-shake structure 3 is reset due to the suspension wires 2. When shooting is focused: the focusing structure 4 is driven by the ampere force generated by the electrified focusing coil 402 in the magnetic field of the focusing magnet 403, and the current direction and the magnitude of the focusing coil 402 are controlled by combining with an external control driving chip, so that the displacement of the lens carrier 401 is controlled, and the automatic focusing function of the lens 6 is realized.
It should be noted that the conductive structure is connected to an external power source through the application module, and the conductive structure is electrically connected to the anti-shake coil 302 and the focusing coil 402; a control driving chip and a vibration sensor are arranged outside/inside the motor, and the control chip and the vibration sensor are respectively and electrically connected with the conductive structure; therefore, the control driving chip can read the vibration sensor, calculate the required anti-shake angle and focusing angle, output the required control signal, and change the current and direction of the anti-shake coil 302 and the focusing coil 402, thereby achieving the anti-shake and focusing effects. While the lens carrier 401 is not connected to the sensor carrier 301, the lens carrier 401 has at least one degree of freedom of spatial displacement with respect to the sensor carrier 301.
Preferably, the housing 102 is made of a magnetic conductive material. Specifically, the magnetic conductive housing 102 can effectively increase the magnetic field intensity flowing through the coil in the motor, so as to achieve greater anti-shake force and focusing force and reduce power consumption.
Preferably, the housing 102 has a rectangular structure, and at least two side plates of the housing 102 are provided with grooves 103, wherein each group of the anti-shake magnets 303 is correspondingly disposed on an inner wall of a bottom surface of one of the grooves 103, and each group of the focusing magnets 403 is correspondingly disposed on an inner wall of a side surface of one of the grooves 103. Specifically, the groove 103 can effectively reduce the volume of the motor and the magnet and store other parts, such as a control driving chip and a vibration sensor, thereby saving space and reducing the cost of the magnet.
Referring to fig. 5, preferably, three groups of anti-shake coils 302 are provided, and two groups of anti-shake magnets 303 are provided; one set of the anti-shake coils 302 and one set of the anti-shake magnets 303 are arranged correspondingly, and the other two sets of the anti-shake coils 302 and the other set of the anti-shake magnets 303 are arranged oppositely. Specifically, by controlling the currents and directions of the three sets of anti-shake coils 302, the two-directional translational forces and the one-roll-directional moment applied to the sensor carrier 301 can be controlled, so that the sensor carrier 301 can perform three-axis anti-shake motion.
Preferably, at least one group of the suspension wires 2 is made of a conductive material, one end of each suspension wire 2 is electrically connected with part or all of the anti-shake coil 302 groups, and the other end of each suspension wire 2 is connected with a conductive structure. Specifically, the anti-shake coil 302 is directly connected with the conductive structure through the suspension wire 2, so that the use of the motor is ensured, and the anti-shake coil 302 and the conductive structure are not required to be connected by other components, so that the internal structure of the motor is simplified.
Referring to fig. 2 and 5, preferably, the lens holder includes at least one set of focusing springs 5, where the focusing springs 5 include two parallel spring pieces 501, and the two parallel spring pieces 501 are respectively disposed above and below the lens carrier 401. Specifically, the parallel spring piece 501 can prevent the lens carrier 401 from colliding with the housing 102 during focusing, so as to achieve a good buffering effect, and reset the lens carrier 401 after shooting.
Referring to fig. 2 and 5, a preferred embodiment of the present invention further provides an application module of an anti-shake focusing motor, including any of the above anti-shake focusing motors, further including:
a lens 6, wherein the lens 6 is arranged on the lens carrier 401;
a module housing 7, wherein the module housing 7 is connected with the bottom end of the shell 102;
the sensor circuit board 8 is mounted on the module shell 7, and the sensor circuit board 8 is respectively connected with the fixed structure 1 and the anti-shake structure 3; the sensor circuit board 8 is electrically connected with the conductive structure;
and the image sensor 9, wherein the image sensor 9 is arranged on the sensor circuit board 8.
Preferably, the sensor further comprises an optical filter 10, and the optical filter 10 is connected to the bottom surface of the sensor carrier 301.
Referring to fig. 4, preferably, the sensor circuit board 8 includes a movable portion 801, an immovable portion 802, and an elastic portion 803, the movable portion 801 and the immovable portion 802 are connected by the elastic portion 803, the movable portion 801 is connected to the sensor carrier 301, and the immovable portion 802 is connected to the positioning socket 101. Specifically, the movable portion 801 and the immovable portion 802 are connected by the elastic member 803, so that the connection is ensured, and at the same time, the movability of the movable portion 801 is ensured, and the movable portion 801 is connected with the sensor carrier 301, so that the movability of the sensor carrier 301 is ensured, and the immovable portion 802 is connected with the positioning seat 101, so that the sensor circuit board 8 is stably mounted. More specifically, the sensor circuit board 8 comprises a movable portion 801, at least one elastic portion 803 and at least one immovable portion 802, the movable portion 801 being provided with at least one movable connecting portion 8011; each of the elastic parts 803 includes a first connecting arm 8031, a second connecting arm 8032 and a bent part 8033, wherein one end of the first connecting arm 8031 is connected to the movable connecting part 8011, and the other end thereof is connected to the bent part 8033; one end of the second connecting arm 8032 is connected to the bent portion 8033; the horizontal included angle between the first connecting arm 8031 and the second connecting arm 8032 is close to 90 degrees; each of the immovable portions 802 is provided with a fixed connection portion 8021, and the fixed connection portion 8021 is connected to the other end of the second connecting arm 8032.
Preferably, a soft material layer is provided between the anti-shake coil 302 and the anti-shake magnet 303, and between the movable portion 801 and the module case 7, respectively. Specifically, the soft material layer is connected to improve the damping coefficient and improve the anti-shake effect, and in addition, the soft material layer provides a heat conduction path, so that heat energy in the anti-shake coil 302 and the sensor circuit board 8 is more effectively transferred to the fixed structure 1, the temperature of the anti-shake coil 302 and the temperature of the image sensor 9 are reduced, and the performance of the image sensor 9 and the anti-shake coil 302 is improved. In addition, metal powder can be added into the soft material layer, and the heat dissipation effect is improved.
Preferably, the groove 103 has an L-shaped structure.
Referring to fig. 5, preferably, the conductive structure on the positioning seat 101 is a suspension circuit board 11, and the suspension circuit board 11 is electrically connected to the sensor circuit board 8. Specifically, the suspension wire circuit board 11 is adopted, so that the module structure is simpler and more compact.
Referring to fig. 6, the grooves 103 preferably extend to two corners of the housing 102, respectively.
The working process of the invention is as follows: sensor circuit board 8 switch-on external equipment, sensor circuit board 8 supplies power for conductive structure, when shooing the anti-shake: the ampere force generated by the electrified anti-shake coil 302 in the magnetic field of the anti-shake magnet 303 is used for driving the anti-shake structure 3 to move, and the external/internal control driving chip controls the current direction and the current magnitude of the anti-shake coil 302, so that the angle and the displacement of the anti-shake structure 3 are controlled, the vibration interference during shooting is counteracted, the image blur is eliminated, and the quality of an image or a film is improved; when shooting is finished, the control driving chip controls the anti-shake coil 302 to be powered off, and the anti-shake structure 3 resets due to the suspension wires 2. When focusing: the focusing structure 4 is driven by the ampere force generated by the electrified focusing coil 402 in the magnetic field of the focusing magnet 403, and the current direction and the magnitude of the focusing coil 402 are controlled by combining with an external control driving chip, so that the displacement of the lens carrier 401 is controlled, and the automatic focusing function of the lens 6 is realized.
To sum up, the preferred embodiment of the present invention provides an anti-shake focusing motor and an application module thereof, which are compared with the prior art:
(1) the anti-shake focusing motor and the application module thereof drive the anti-shake structure 3 to move by utilizing the ampere force generated by the electrified anti-shake coil 302 in the magnetic field of the anti-shake magnet 303, and control the current direction of the anti-shake coil 302 by combining with an external or internal control driving chip, so that the vibration interference during shooting is counteracted to eliminate the image blur, and the quality of the image or the film is improved; the anti-shake coils 302 and the anti-shake magnets 303 can be combined in different numbers, so that the anti-shake function from two shafts to multiple shafts is realized; the anti-shake effect is obvious, and the regulation is fast and stable.
(2) The anti-shake focusing motor and the application module thereof utilize the actuator driven by electromagnetic force, do not need a complex mechanical transmission structure, have the advantages of simple and compact structure, convenient assembly, small volume, light weight, low cost and low power consumption, and are beneficial to large-scale production and application.
(3) The anti-shake focusing motor and the application module thereof do not generate nonlinear friction force in the anti-shake process, and have better effect of coping with the vibration which is relatively fine and has frequently changed direction.
(4) The anti-shake focusing motor and the application module thereof can also drive the focusing structure 4 by utilizing the ampere force generated by the electrified focusing coil 402 in the magnetic field of the focusing magnet 403, and control the current direction of the focusing coil 402 by combining an internal or external control driving chip, thereby realizing the automatic focusing function of the lens 6, and the focusing is rapid and accurate.
It should be noted that some or all of the anti-shake coils 302 may also be electrically connected to the fixing structure 1 of the motor through the elastic portion 803 of the sensor circuit board 8, rather than through the suspension wires 2; the vibration sensor or the anti-shake control chip can be arranged inside or outside the module structure; a displacement sensor, such as a hall effect sensor, may be added to the present invention for closed-loop anti-shake or focus control; the focusing structure 4 can be realized by other methods, such as memory metal type and piezoelectric type motors; the sensor circuit board 8 may be a flex-hard board or other conductive structure; the coil can be wound by an electrified wire or consists of a circuit board; other numbers of magnets, independent coils, and housing 102 designs are used; the suspension wires 2 can be placed at different positions, including one corner of the motor; a magnetic conductive metal sheet can be added near the anti-shake magnet 303, so that the installation is convenient, the anti-shake electromagnetic force is improved, and the anti-shake power consumption is reduced; the above is also within the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An anti-shake focus motor, comprising:
the fixing structure comprises a positioning seat and a shell; the positioning seat is arranged at the upper part of the inner part of the shell;
one end of the suspension wire is connected with the fixed structure;
the anti-shake structure is connected with the other end of the suspension wire and comprises a sensor carrier, at least one set of anti-shake magnets and at least two sets of anti-shake coils, the anti-shake magnets are fixed inside the shell, the sensor carrier is movably arranged at the lower part inside the shell, the anti-shake coils are arranged on the sensor carrier, and the anti-shake coils and the anti-shake magnets are arranged correspondingly; the two groups of anti-shake coils are arranged side by side and are arranged opposite to one group of anti-shake magnets, the included angle of ampere force generated by the two groups of anti-shake coils is less than 20 degrees, and the sensor carrier can be controlled to perform rolling two-axis anti-shake motion;
the focusing structure is arranged on the sensor carrier and comprises a lens carrier, at least one group of focusing magnets and at least one group of focusing coils; the focusing magnet is fixedly arranged on the inner wall of the shell; the lens carrier at least has one spatial displacement freedom degree, the focusing coil is arranged on the periphery of the lens carrier, and the focusing coil and the focusing magnet are oppositely arranged.
2. The anti-shake focus motor according to claim 1, wherein: the shell is made of a magnetic conductive material.
3. The anti-shake focus motor according to claim 1, wherein: the shell is of a rectangular structure, grooves are formed in at least two outer side walls of the shell, the anti-shake magnets are arranged on the inner walls of the bottoms of the grooves in a one-to-one correspondence mode, and each group of focusing magnets are arranged on the inner walls of the side portions of the grooves in a corresponding mode.
4. The anti-shake focus motor according to claim 1, wherein: the anti-shake coils are provided with three groups, and the anti-shake magnets are provided with two groups; one group of anti-shake coils and one group of anti-shake magnets are arranged correspondingly, and the other two groups of anti-shake coils and the other group of anti-shake magnets are arranged oppositely; the sensor carrier may perform a three-axis anti-shake motion including roll.
5. The anti-shake focus motor according to claim 1, wherein: at least one group of the suspension wires is made of conductive materials, one end of each suspension wire is electrically connected with part or all of the anti-shake coil groups, and the other end of each suspension wire is connected with the conductive structure in the fixing structure.
6. The anti-shake focus motor according to claim 1, wherein: the motor further comprises at least one group of focusing springs, each focusing spring comprises two parallel spring pieces, and the two parallel spring pieces are arranged above and below the lens carrier respectively.
7. The utility model provides an application module of anti-shake focusing motor which characterized in that: the anti-shake focus motor according to any of claims 1 to 6, further comprising:
the lens is arranged on the lens carrier;
the module shell is connected with the bottom end of the fixed structure;
the sensor circuit board is arranged inside the module shell and is respectively connected with the fixing structure and the anti-shake structure;
an image sensor disposed on the sensor circuit board.
8. The anti-shake focusing motor application module of claim 7, wherein: the sensor also comprises an optical filter, and the optical filter is connected with the bottom surface of the sensor carrier.
9. The anti-shake focusing motor application module of claim 7, wherein: the sensor circuit board comprises a movable part, an immovable part and an elastic part, the movable part and the immovable part are connected through the elastic part, the movable part is connected with the sensor carrier, and the immovable part is connected with the positioning seat.
10. The anti-shake focus motor application module as claimed in claim 9, wherein: and soft material layers are respectively arranged between the anti-shake coil and the anti-shake magnet and between the movable part and the module shell.
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| CN202011397648.9A CN112415708B (en) | 2020-12-02 | 2020-12-02 | Anti-shake focusing motor and application module thereof |
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| CN202011397648.9A CN112415708B (en) | 2020-12-02 | 2020-12-02 | Anti-shake focusing motor and application module thereof |
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Address after: Room 329, 2W Building, 2 Science and Technology Avenue West, Hong Kong Science Park, Pak Shek Kok, Shatin, New Territories, Hong Kong, China Patentee after: VISTA INNOTECH Ltd. Address before: Room 915, 9 / F, No.19, science and technology Avenue West, baishijiao Science Park, Shatin, New Territories, Hong Kong, China Patentee before: VISTA INNOTECH Ltd. |