CN113132619B - Optical anti-shake device, camera module and mobile terminal - Google Patents
Optical anti-shake device, camera module and mobile terminal Download PDFInfo
- Publication number
- CN113132619B CN113132619B CN201911426021.9A CN201911426021A CN113132619B CN 113132619 B CN113132619 B CN 113132619B CN 201911426021 A CN201911426021 A CN 201911426021A CN 113132619 B CN113132619 B CN 113132619B
- Authority
- CN
- China
- Prior art keywords
- movable plate
- fixed
- cantilever
- elastic sheet
- lens assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- H04N23/60—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
- H04N23/681—Motion detection
- H04N23/6811—Motion detection based on the image signal
-
- 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
Abstract
The application provides an optical anti-shake device, comprising a fixed substrate; the movable plate is arranged on one side of the fixed substrate at a preset interval and is used for mounting the lens assembly and driving the lens assembly to move in an XY plane; the lens assembly comprises a lens assembly, a movable plate, a fixed substrate, at least two elastic sheet cantilevers, at least two bent parts and at least two elastic sheet cantilevers, wherein one end of each elastic sheet cantilever is fixed on the movable plate, the other end of each elastic sheet cantilever is fixed on the fixed substrate, each elastic sheet cantilever arches towards one side of the lens assembly to form an arc-shaped structure, when the movable plate moves to any position towards the fixed substrate along the Z-axis direction, the vertical distance between the highest point of the arch of the arc-shaped structure and the fixed substrate is smaller than the vertical distance between the lens assembly and the fixed substrate, each elastic sheet cantilever is provided with at least two bent parts, and each bent part protrudes towards one side close to the fixed substrate; and a driving component for driving the movable plate to move relative to the fixed substrate. This optics anti-shake device can avoid the shell fragment to cause the interference to the lens subassembly at the in-process of buckling through setting up two at least kink with the shell fragment cantilever. The application also provides the camera module and the mobile terminal.
Description
Technical Field
The application relates to the technical field of lens driving devices, in particular to an optical anti-shake device, a camera module and a mobile terminal.
Background
With the development of technology and economy, mobile terminals such as mobile phones and tablet computers with camera shooting function are popular among the public due to their characteristics of complete functions, small size, portability and the like. In order to seek and freeze the natural beauty, people often use the camera function even in high-vibration environments, such as vehicle-mounted shooting. This puts higher demands on the anti-vibration performance of the lens in the camera.
Currently, a voice coil motor-shape memory alloy (OIS) driving device is commonly used in a camera for driving a lens to move or rotate to implement auto-focus and OIS respectively. The OIS driver is usually provided with a spring plate for resisting the gravity and impact of the voice coil motor, so as to achieve shock resistance and anti-shake. However, in a high vibration environment, the elastic sheet may be sharply bent due to gravity caused by downward movement of the camera lens and impact force caused by movement of the voice coil motor, so that the elastic sheet may cause contact interference with the voice coil motor, and risks such as short circuit and wear of devices may be caused.
Disclosure of Invention
In view of this, the embodiment of the present application provides an optical anti-shake device, which is anti-seismic and anti-shake, and can effectively avoid the contact interference risk between the elastic sheet cantilever and the lens assembly, so as to solve the problem that the elastic sheet in the conventional anti-shake device interferes with the voice coil motor in the bending process to a certain extent.
Specifically, a first aspect of embodiments of the present application provides an optical anti-shake apparatus for a camera lens assembly, including:
fixing the substrate;
the movable plate is arranged on one side of the fixed substrate at preset intervals and used for mounting the lens assembly and driving the lens assembly to move in an XY plane;
the lens assembly comprises a movable plate, a lens assembly, at least two elastic sheet cantilevers, at least two bent parts and at least two elastic sheet cantilevers, wherein one end of each elastic sheet cantilever is fixed on the movable plate, the other end of each elastic sheet cantilever is fixed on the fixed base plate, the at least two elastic sheet cantilevers are arched towards one side of the lens assembly to form an arc-shaped structure, when the movable plate moves to any position towards the fixed base plate along the Z-axis direction, the vertical distance between the highest point of the arch of the arc-shaped structure and the fixed base plate is smaller than the vertical distance between the lens assembly and the fixed base plate, the elastic sheet cantilevers are provided with at least two bent parts, and the bent parts are protruded towards one side close to the fixed base plate; and
and the driving assembly is connected between the fixed substrate and the movable plate and is used for driving the movable plate to move relative to the fixed substrate.
In an embodiment of the present application, the at least two bending portions are disposed along an extending direction of the elastic piece cantilever.
In an embodiment of the present application, a distance between a bending point of the at least two bending portions and any one end of the elastic piece cantilever is 1/10-7/10 of the length of the elastic piece cantilever.
In the embodiment of the application, the distance between any two adjacent bending parts is 0.5-5.0 mm.
In the embodiment of the application, the number of the bending parts on the elastic sheet cantilever in unit length is 2-20/cm.
In the embodiment of the application, the curvature radius of the bending part on the elastic sheet cantilever is 0.3-1.0 mm.
In an embodiment of the present application, the at least two bending portions are arranged at intervals from one end of the elastic sheet cantilever fixed on the movable plate to one end of the elastic sheet cantilever fixed on the fixed substrate.
In an embodiment of the present application, the at least two elastic piece cantilevers are centrosymmetric with respect to the movable plate.
In an embodiment of the present application, an orthographic projection shape of the elastic piece cantilever on the fixed substrate is an L shape, an arc shape, or an irregular shape.
In the embodiment of the present application, the distance between the movable plate and the fixed substrate in the Z-axis direction is 0.05-0.35 mm.
In an embodiment of the present application, the drive assembly comprises a shape memory alloy wire drive assembly.
In the embodiment of the application, shape memory alloy silk drive assembly includes a plurality of shape memory alloy silk, every shape memory alloy silk's one end is fixed on the PMKD, the other end is fixed on the fly leaf.
In the embodiment of the application, a diagonal of PMKD is equipped with and is used for fixing the first anchor clamps of shape memory alloy silk, a diagonal of fly leaf is equipped with and is used for fixing the second anchor clamps of shape memory alloy silk, a plurality of shape memory alloy silk wind the peripheral distribution all around of fly leaf.
In the embodiment of the application, the at least two elastic sheet cantilevers and the movable plate are integrally formed.
In the embodiment of the application, the center of the movable plate is provided with a light-transmitting through hole for light signals to pass through.
In an embodiment of the present application, the at least two elastic cantilever arms are fixed on the fixed substrate according to the following method: bending the elastic sheet cantilever with one end fixed on the movable plate at least twice so as to lift the other end of the elastic sheet cantilever by a prepressing height in the Z-axis direction; wherein the spring plate cantilever and the movable plate are positioned on the same XY plane before the bending treatment; after the bending treatment, the movable plate is flatly placed on the fixed substrate, and then the other ends of the elastic sheet cantilevers are pre-pressed to the pre-fixed position of the fixed substrate, so that the at least two elastic sheet cantilevers are arched to one side departing from the fixed substrate to form an arc-shaped structure.
In the present embodiment, the bending angle of the bending process is 130-175 °.
The optical anti-shake device provided by the first aspect of the embodiment of the application has excellent anti-shake and anti-shake performances, and can resist the gravity and the impact force during movement of the lens assembly on the movable plate; meanwhile, in the optical anti-shake device, when the movable plate moves to any position along the Z-axis direction towards the fixed substrate, the elastic sheet cantilever in the device can always keep a gap with the lens assembly, so that the contact interference risk of the elastic sheet cantilever and the lens assembly is effectively avoided, and the risks of short circuit, device abrasion and the like are prevented.
A second aspect of the embodiments of the present application provides a camera module, including an optical anti-shake device and a lens assembly fixed on the optical anti-shake device, wherein the optical anti-shake device includes:
fixing the substrate;
the movable plate is arranged on one side of the fixed substrate at preset intervals and used for mounting the lens assembly and driving the lens assembly to move in an XY plane;
the lens assembly comprises a movable plate, a lens assembly, at least two elastic sheet cantilevers, at least two bent parts and at least two elastic sheet cantilevers, wherein one end of each elastic sheet cantilever is fixed on the movable plate, the other end of each elastic sheet cantilever is fixed on the fixed base plate, the at least two elastic sheet cantilevers are arched towards one side of the lens assembly to form an arc-shaped structure, when the movable plate moves to any position towards the fixed base plate along the Z-axis direction, the vertical distance between the highest point of the arch of the arc-shaped structure and the fixed base plate is smaller than the vertical distance between the lens assembly and the fixed base plate, the elastic sheet cantilevers are provided with at least two bent parts, and the bent parts are protruded towards one side close to the fixed base plate; and
and the driving assembly is connected between the fixed substrate and the movable plate and is used for driving the movable plate to move relative to the fixed substrate.
In the embodiment of the application, the lens subassembly includes voice coil motor and locates camera lens in the voice coil motor, voice coil motor is used for the drive camera lens automatic focusing, optics anti-shake device is used for the drive voice coil motor removes in XY axle direction.
The camera module of the second aspect of the embodiment of the present application is equipped with the optical anti-shake device of the first aspect of the present application, and this camera module can be applicable to under the environment of high vibrations, and has characteristics that the drive is small, magnetic interference is little, efficient, fast, the low power dissipation.
A third aspect of the embodiments of the present application provides a mobile terminal, including a housing assembly and a camera module installed on the housing assembly, where the camera module is as described in the second aspect of the embodiments of the present application.
The mobile terminal in the third aspect of the embodiment of the present application may be a mobile phone, or an electronic product such as a tablet computer and an intelligent wearable product.
Drawings
Fig. 1 is a schematic structural diagram of an optical anti-shake apparatus according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of an optical anti-shake apparatus along the direction A-A according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of an optical anti-shake apparatus along the direction A-A according to another embodiment of the present application;
fig. 4 is a schematic structural view illustrating a bending process of a spring cantilever of an optical anti-shake apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram illustrating a spring plate cantilever pre-pressing process of the optical anti-shake apparatus according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a camera module according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
Detailed Description
The following description will be made with reference to the drawings in the embodiments of the present application.
As shown in fig. 1 and 2, an embodiment of the present application provides an optical anti-shake apparatus 100 for a camera lens assembly, including:
the movable plate 20 is fixed on the fixed substrate 10, the at least two elastic sheet cantilevers 30 and the driving assembly 40 are arranged; the movable plate 20 is arranged on one side of the fixed substrate 10 at a preset interval, and the movable plate 20 is used for mounting the lens assembly 50 and driving the lens assembly 50 to move in an XY plane; one end of the elastic cantilever 30 is fixed on the movable plate 20, the other end of the elastic cantilever 30 is fixed on the fixed substrate 10, at least two elastic cantilevers 30 arch to one side of the lens assembly 50 to form an arc structure, when the movable plate 20 moves to any position along the Z-axis direction towards the fixed substrate 10, the vertical distance H1 between the highest point of the arc structure and the fixed substrate 10 is smaller than the vertical distance H2 between the lens assembly 50 and the fixed substrate 10, the elastic cantilever 30 has at least two bending parts 31, and the bending part 31 protrudes to one side close to the fixed substrate 10; the driving assembly 40 is connected between the fixed substrate 10 and the movable plate 20 for driving the movable plate 20 to move relative to the fixed substrate 10.
In the embodiment of the present application, the lens assembly 50 is installed on a side of the movable plate 20 away from the fixed substrate 10. The lens assembly 50 may be, but is not limited to being, adhesively secured to the movable plate 20.
In the embodiment of the present application, the bent portion 31 of the elastic cantilever 30 is a convex arc structure, and includes a convex portion 311 and a concave portion 312. The convex portion 311 of the bent portion 31 faces the fixed board 10, and the opening of the concave portion 312 of the bent portion 31 faces away from the fixed board 10. When the elastic cantilever 30 is forced to arch toward the lens assembly 50 to form an arc structure, each bent portion 31 of the elastic cantilever 30 guides a part of the elastic cantilever 30 to move toward the fixed substrate, so that the vertical distance between the highest point of the arch structure of the entire elastic cantilever 30 and the fixed substrate 10 is reduced.
According to the optical anti-shake device, the elastic sheet cantilever is provided with at least two bending parts, and when a movable plate in the optical anti-shake device is stressed and compressed towards a direction close to the fixed substrate, the at least two elastic sheet cantilevers arch towards one side of the lens component to form an arc-shaped structure; at this moment, each bending part on the elastic sheet cantilever guides the local part of the elastic sheet cantilever to be close to the fixed substrate, so that the vertical distance between the highest point of the arc-shaped structure arch of the whole elastic sheet cantilever 30 and the fixed substrate is reduced, the elastic sheet cantilever in the device can always keep a safety gap with the lens assembly on the movable plate, the contact interference between the elastic sheet cantilever and the lens assembly is avoided, and the risks of short circuit, device abrasion and the like are prevented.
In the embodiment of the present application, as shown in fig. 1, when the movable plate 20 and the spring suspension arm 30 are at the initial position, the vertical distance H1 between the highest point of the arc structure formed by the overall arching of the spring suspension arm 30 and the fixed substrate 10 is the smallest, and when the movable plate 20 moves towards the fixed substrate 10 along the Z-axis direction, the overall spring suspension arm 30 is more bent, and H1 is increased accordingly, when the movable plate 20 moves towards the fixed substrate 10 along the Z-axis direction to any position, even the spring suspension arm 30 is bent to the limit, H1< H2 can still be maintained, and the contact interference of the spring suspension arm on the lens assembly mounted on the movable plate can be effectively avoided.
In the embodiment of the present application, at least two bending portions 31 are disposed at intervals along the extending direction, i.e., the length direction, of the elastic piece cantilever 30. In the embodiment of the application, the bending parts at different distribution positions on the elastic sheet cantilever affect the vertical distance H1 between the highest point of the arc-shaped structure of the elastic sheet cantilever and the fixed substrate; by adjusting the distribution positions of the bending parts on the elastic sheet cantilever, when the elastic sheet cantilever is stressed and bent, the vertical distance H1 is kept to be lower than the vertical distance H2, the elastic sheet cantilever is maintained to have higher elastic sheet toughness, the optical anti-shake performance of the whole device is kept, and the movement of a movable plate in the device on the XY axis is not influenced. In some embodiments of the present application, the distance between the bending point of the at least two bending portions and any one end of the resilient cantilever is 1/10-7/10 of the length of the resilient cantilever. In some embodiments, the distance between the bending point of the at least two bending parts and any one end of the spring plate cantilever is 1/10-3/5 of the length of the spring plate cantilever. In other embodiments, the distance between the bending point of the at least two bending parts and any one end of the spring plate cantilever is 1/4-3/5 of the length of the spring plate cantilever. In some embodiments, the distance between the bending point of the at least two bending parts and any one end of the spring plate cantilever is 1/10, 1/5, 3/10, 2/5, 1/2, 3/5 or 7/10 of the length of the spring plate cantilever.
In the embodiment of the present application, the at least two bending portions 31 are arranged at intervals from one end of the elastic cantilever 30 fixed on the movable plate 20 to one end fixed on the fixed substrate 10. Because in the optical anti-shake device of different specification and size, the shape and the length of shell fragment cantilever all have the difference, through the interval of two arbitrary adjacent kinks on the reasonable adjustment shell fragment cantilever, can further regulation and control the vertical distance H1 between the maximum point that shell fragment cantilever arc structure arches and the fixed baseplate. In some embodiments of the present application, the distance between any two adjacent bending portions is the same. In other embodiments, the distance between any two adjacent bending portions is different. The distance between any two adjacent bending portions herein refers to the distance between the bending points of any two adjacent bending portions.
Referring to fig. 3, in some embodiments of the present application, three bending portions are disposed on the elastic cantilever, which are a first bending portion 32, a second bending portion 33, and a third bending portion 33. The first bent portion 32, the second bent portion 33 and the third bent portion 33 are arranged at intervals from the end of the elastic cantilever 30 fixed on the movable plate 20 to the end fixed on the fixed substrate 10. The distance between the first bent portion 32 and the second bent portion 33 is L1, and the distance between the second bent portion 33 and the third bent portion 33 is L2.
In the embodiment of the present application, the distance between any two adjacent bending portions may be, but is not limited to, 0.5 to 5.0 mm. In some embodiments, the distance between any two adjacent bending parts is 1.0-5.0 mm. In other embodiments, the distance between any two adjacent bending parts is 1.5-4.0 mm. In some embodiments, the distance between any two adjacent bends may be specifically 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, or 5.0 mm.
In the embodiment of the present application, the elastic cantilever 30 may further include a plurality of bending portions. For optical anti-shake devices of different specifications and sizes, the number of the bending parts arranged on the elastic sheet cantilever has certain difference. The bending parts with different numbers are arranged on the elastic sheet cantilever, so that the deformation of the elastic sheet cantilever under stress can be changed to a certain degree, and particularly, in the prepressing process, the whole elastic sheet cantilever is arched to one side of the lens component to form the highest point position in the Z-axis direction of an arc-shaped structure. When the prepressing height is kept unchanged, the number of the bending parts on the elastic sheet cantilever is increased, and the highest point position of the arc-shaped structure of the elastic sheet cantilever in the prepressing process in the Z-axis direction can be lowered. In some embodiments, the number of the bending parts on the unit length of the elastic sheet cantilever is 2-20/cm. In other embodiments, the number of the bending parts on the unit length of the elastic sheet cantilever is 4-18/cm. In some embodiments, the number of the bending parts on the elastic piece cantilever per unit length is specifically 2/cm, 4/cm, 6/cm, 8/cm, 9/cm, 10/cm, 12/cm, 14/cm, 16/cm, 18/cm, or 22/cm.
In the embodiment of the present application, the convex arc structure of the bending portion 31 on the elastic cantilever 30 is bent according to a certain curvature radius, so as to prevent the elastic cantilever from causing the decrease of the distance between the sorbite tissue sheets and the increase of the dislocation density inside the elastic cantilever due to the large deformation, thereby causing cracks or even breakage. In the embodiment of the present application, the radius of curvature of the bent portion of the elastic sheet cantilever may be, but is not limited to, 0.3-1.0 mm. In some embodiments, the radius of curvature of the bent portion on the spring arm is 0.5-1.0 mm. In other embodiments, the radius of curvature of the bent portion of the spring arm may be, but is not limited to, 0.5-0.8 mm.
In the embodiment of the present application, at least two elastic cantilever arms are fixed on the fixed substrate according to the following method: bending the elastic sheet cantilever with one end fixed on the movable plate at least twice so as to lift the other end of the elastic sheet cantilever by a prepressing height in the Z-axis direction; wherein the elastic sheet cantilever and the movable plate are positioned on the same XY plane before bending treatment; after bending processing, the movable plate is flatly placed on the fixed substrate, and then the other end of the elastic sheet cantilever is pre-pressed to the pre-fixed position of the fixed substrate, so that one side of at least two elastic sheet cantilevers, which is back to the fixed substrate, is arched to form an arc-shaped structure.
In the embodiment of the present application, the bending angle of the bending process is an obtuse angle. The direction of buckling in the bending process is towards the direction of keeping away from the fixed base plate, and after the shell fragment cantilever is bent many times, its other end can be continuously upwarped to the direction of keeping away from the fixed base plate, until reaching the pre-compaction height in the Z axle direction. In the embodiment of the present application, the pre-pressing height may be achieved by bending twice, or may be achieved by bending three or more times. The prepressing height is determined by comprehensively considering all parameters of the camera equipment.
Referring to fig. 4, after the elastic cantilever 30 fixed on the movable plate is bent twice, a first bent portion 32 and a second bent portion 33 are sequentially formed, where the bending angle of the first bending is θ 1, and the bending angle of the second bending is θ 2; the prepressing height is h. Accordingly, in the first bending process, the actual bending angle α 1; the second bending process is performed at an actual bending angle α 1.
Referring to fig. 5, after the bending process, the movable plate is horizontally placed on the fixed substrate 10, and then the upturned other end of the resilient cantilever 30 is pre-pressed to the pre-fixing position 11 of the fixed substrate 10, so that the resilient cantilever 30 is integrally arched to a side away from the fixed substrate 10 to form an arc structure, and at this time, a vertical distance H1 between the highest point of the arc structure and the fixed substrate 10 can be obtained. In order to make the movable plate lie on the fixed substrate 10, the movable plate may be made to be on the same XY plane by adding a support.
In the process of being installed on the fixed substrate, when the bent elastic sheet cantilever is stressed and pre-pressed to the pre-fixed position of the fixed substrate, the elastic sheet cantilever can be stressed to arch towards one side of the lens component fixed on the movable plate to form an arc-shaped structure, and the highest point of the arch is the maximum height of the elastic sheet cantilever from the fixed substrate in the Z-axis direction. In the prior art, when the spring cantilever is pre-pressed to a pre-fixing position of a fixing substrate, the arched structural portion of the spring cantilever interferes with a lens assembly (e.g., a voice coil motor), and damages or even causes a short circuit. After the elastic sheet cantilever is bent for more than two times, the vertical distance H1 between the arc-shaped structure formed by the arching of the elastic sheet cantilever and the fixed substrate can be effectively reduced on the premise of maintaining the pre-pressing height unchanged, and the adverse effects are effectively avoided. The installation method is simple in process and greatly reduces the manufacturing process cost.
In the embodiment of the present application, the bending angle of the bending process may be, but is not limited to, 100 ° and 175 °. In some embodiments, the bending angle of the bending process is 120-175 °. In other embodiments, the bending angle of the bending process is 150 and 175 degrees. The bending angle of each bending process may be the same or different.
In the embodiment of the application, under the prerequisite that the pre-compaction height is H (or pre-compaction height) unchangeable, when the angle of buckling that handles at every turn is the same, the increase of the number of times of buckling that accompanies, the angle of buckling theta of handling at every turn can constantly increase, the angle alpha of actually buckling can constantly reduce to the shell fragment cantilever arches into the maximum point of arc structure and the vertical distance H1 between the fixed base plate to lens subassembly one side also can constantly reduce. In some embodiments, when bending processing is performed on the spring plate cantilever n times (n is a positive integer greater than 2), α (n) < α (n-1) < … < α 2 under the premise that the pre-pressing height H is not changed, and when the spring plate cantilever is pre-pressed, H1(n) < H1(n-1) < … < H1(2) < H2 (the vertical distance between the lens component and the fixed substrate), the risk of contact interference between the spring plate cantilever and the lens component is avoided.
In the embodiment of the present application, two ends of the elastic cantilever may be, but are not limited to, fixed on the fixed substrate and the movable plate respectively by welding. Specifically, the specific welding position of the elastic sheet cantilever on the fixed substrate can be adjusted according to the specification and size difference of the optical anti-shake device. The distance between the movable plate and the fixed substrate in the Z-axis direction can be adjusted by adjusting the specific welding position of the elastic sheet cantilever fixed on the movable plate on the fixed substrate; and the elastic supporting force of the elastic sheet cantilever to the movable plate is adjusted.
In the present embodiment, the elastic cantilever 30 and the movable plate 20 may also be an integrated part. In some embodiments, at least two of the spring arms extend from the side of the movable plate. When at least two shell fragment cantilevers and fly leaf integrated into one piece, can strengthen the stability between shell fragment cantilever and the fly leaf greatly, guarantee the shell fragment cantilever to the stable elastic support effect of fly leaf, promote the accuracy of optics anti-shake device.
In the embodiment of the application, at least two elastic sheet cantilevers are symmetrical about the center of the movable plate. After fixing at least two shell fragment cantilevers with the mode about fly leaf central symmetry, can promote whole optics anti-shake device's balance stability greatly, further promote optics anti-shake device's precision, and be favorable to the drive assembly to carry out the accurate drive.
In the embodiment of the present application, the orthographic projection shape of the elastic sheet cantilever on the fixed substrate is an L shape, an arc shape or an irregular shape. In some embodiments, the orthographic projection shape of the spring cantilever on the fixed substrate is an L shape. In other embodiments, the orthographic projection shape of the spring cantilever on the fixed substrate is an arc or an irregular shape. The irregular shape here may be a structure whose cross-sectional shape is a polygon.
In the application embodiment, the spring cantilever may be made of stainless steel, copper or copper alloy. The elastic sheet cantilever can provide elastic supporting force for the movable plate on one hand, and can also realize the electric connection between the movable plate and the fixed substrate on the other hand.
In this application embodiment, can select the shell fragment cantilever that has suitable elastic coefficient according to the actual demand to provide stable elastic support power for the fly leaf, promote anti-shake, the anti-seismic performance of optics anti-shake device.
In the present embodiment, a light-transmitting through hole 21 is formed in the center of the movable plate 20 for passing light signals, as shown in fig. 1. The aperture size of the light-transmitting through hole is matched with the size of a lens of the lens component, and can be adjusted according to practical application.
In the embodiment of the application, the optical anti-shake device has the characteristics of small volume, high efficiency, high speed and low power consumption; in the optical anti-shake devices with different specifications and sizes, the distance between the movable plate and the fixed substrate in the Z-axis direction is different. Specifically, the distance between the movable plate and the fixed substrate in the Z-axis direction may be, but is not limited to, 0.05-0.35 mm. In some embodiments, the distance between the movable plate and the fixed substrate in the Z-axis direction is 0.05-0.3 mm. In other embodiments, the distance between the movable plate and the fixed substrate in the Z-axis direction is 0.1-0.3 mm.
In the present embodiment, a through hole may be disposed at the center of the fixed substrate 10, and the through hole is opposite to the light-transmitting through hole of the movable plate. The through hole of the fixed substrate and the light-transmitting through hole of the movable plate are used for light signals to pass through. In some embodiments, the received optical signal of the lens in the lens assembly may sequentially pass through the light-transmitting through hole of the movable plate and the through hole of the fixed substrate to reach the image sensor disposed below the fixed substrate.
In the present embodiment, the drive assembly 40 comprises a shape memory alloy wire drive assembly. Referring to fig. 1, the shape memory alloy wire driving assembly includes four shape memory alloy wires 41, and one end of each shape memory alloy wire 41 is fixed to the fixed substrate 10 and the other end is fixed to the movable plate 20. In some embodiments, the movable plate 20 has a quadrilateral structure with a central region containing a light-transmitting through hole, the shape memory alloy wire driving assembly includes four shape memory alloy wires 41, wherein a first clamp 101 for fixing the shape memory alloy wires 41 is disposed at a pair of corners of the fixed substrate 10, a second clamp 201 for fixing the shape memory alloy wires 41 is disposed at a pair of corners of the movable plate 20, one end of each shape memory alloy wire 41 is fixed on the fixed substrate 10, the other end of each shape memory alloy wire 41 is fixed on the movable plate 20, and the four shape memory alloy wires 41 are distributed around the periphery of the movable plate 20.
In the embodiment of the application, the shape memory alloy wire material is a novel functional material and is characterized in that the shape (such as shape or volume) of the shape memory alloy wire material can be changed under the action of certain external force, but when the temperature is increased to a certain value, the shape memory alloy wire material can completely recover the original shape. The shape memory alloy wire can be adjusted in shape by means of heating and the like. In some embodiments, a plurality of shape memory alloy wires are connected in series or in parallel or in series-parallel to form a power-on circuit, and a power-on regulation mode is adopted to form a driving assembly with relatively perfect functions, so as to provide braking/driving force for the optical anti-shake device.
In the embodiment of the present application, the first clamp may be, but not limited to, a clamping jaw structure, and the first clamp may firmly fix one end of the shape memory alloy wire; meanwhile, the first clamp has the conductive property, and the shape memory alloy wire can be provided with electric energy through the first clamp. The first clamp may be fixed on the fixed base plate by welding or a bolt structure.
In the embodiment of the present application, the second clamp may be, but not limited to, a clamping jaw structure, and the second clamp may firmly fix the other end of the shape memory alloy wire; at the same time, the second clamp also contains conductive properties. The fixed position of the second clamp on the movable plate can also be a diagonal extension of the movable plate.
In the embodiment of the present application, the shape memory alloy wire is arranged in a structure capable of effectively driving the movable plate of the optical anti-shake apparatus to move in the XY-axis direction. The shape memory alloy wire is fixed on the movable plate at one end, and gaps are reserved between other areas and the movable plate to prevent the movable plate from generating collision interference on the shape memory alloy wire in the moving process.
The optical anti-shake device 100 provided by the embodiment of the application has excellent anti-shake and anti-shake performances, and can resist the gravity and the impact force during movement of the lens assembly on the movable plate; meanwhile, in the working process of the optical anti-shake device, the elastic sheet cantilever in the device can always keep a gap with the lens assembly, the contact interference risk of the elastic sheet cantilever and the lens assembly is effectively avoided, and the risks such as short circuit and device abrasion are prevented. Because the existing optical anti-shake devices are developed towards the direction of small driving volume, small magnetic interference, high efficiency, high speed and low power consumption, under the limitation of space conditions, the vertical distance H1 between an arc structure formed by the arching of the elastic sheet cantilever and the fixed substrate is effectively reduced by arranging a plurality of bending parts on the elastic sheet cantilever, the interference of the elastic sheet cantilever on a lens assembly (such as a voice coil motor) is effectively avoided, and the damage or even the short circuit risk is avoided; the method has simple process and greatly reduces the manufacturing process cost.
The embodiment of the present application further provides a camera module 200, referring to fig. 6, including an optical anti-shake device 210 and a lens assembly 220 fixed on the optical anti-shake device 210, where the optical anti-shake device 210 includes: the movable plate 20 is fixed on the fixed substrate 10, the at least two elastic sheet cantilevers 30 and the driving assembly 40 are arranged; the movable plate 20 is disposed at a predetermined interval on one side of the fixed substrate 10, and the movable plate 20 is used for mounting the lens assembly 220 and driving the lens assembly 220 to move in an XY plane; one end of the elastic cantilever 30 is fixed on the movable plate 20, the other end of the elastic cantilever 30 is fixed on the fixed substrate 10, at least two elastic cantilevers 30 arch to one side of the lens assembly 220 to form an arc structure, when the movable plate 20 moves to any position along the Z-axis direction towards the fixed substrate 10, the vertical distance H1 between the highest point of the arc structure and the fixed substrate 10 is smaller than the vertical distance H2 between the lens assembly 220 and the fixed substrate 10, the elastic cantilever 30 has at least two bending parts 31, and the bending part 31 protrudes to one side close to the fixed substrate 10; the driving assembly 40 is connected between the fixed substrate 10 and the movable plate 20 for driving the movable plate 20 to move relative to the fixed substrate 10.
In the embodiment of the present application, the specific definition of the optical anti-shake apparatus 210 may be the same as that of the optical anti-shake apparatus 100, and is not described herein again.
In the embodiment of the present application, the lens assembly 220 includes a voice coil motor and a lens disposed in the voice coil motor, the voice coil motor is used for driving the lens to automatically focus, and the optical anti-shake apparatus 210 is used for driving the voice coil motor to move in the XY axis direction. In the embodiments of the present application, the voice coil motor may be, but is not limited to, fixed to the movable plate by bonding. The voice coil motor may be a voice coil motor structure in the prior art, and this embodiment is not particularly limited.
In the embodiment of the present application, the camera module 200 is provided with the optical anti-shake device 210, and the camera module can be applied to the environment with high vibration, and has the characteristics of small driving volume, small magnetic interference, high efficiency, high speed and low power consumption.
The embodiment of the present application further provides a mobile terminal 300, see fig. 7, including a housing assembly 310 and a camera module 320 mounted on the housing assembly 310. The camera module 320 is the camera module 200 provided in the embodiment of the present application. The mobile terminal can be an electronic product such as a mobile phone, a tablet computer and an intelligent wearable product.
Claims (20)
1. An optical anti-shake apparatus for a camera lens assembly, comprising:
fixing the substrate;
the movable plate is arranged on one side of the fixed substrate at preset intervals and used for mounting the lens assembly and driving the lens assembly to move in an XY plane;
the lens assembly comprises a movable plate, a lens assembly, at least two elastic sheet cantilevers, at least two bent parts and at least two elastic sheet cantilevers, wherein one end of each elastic sheet cantilever is fixed on the movable plate, the other end of each elastic sheet cantilever is fixed on the fixed base plate, the at least two elastic sheet cantilevers are arched towards one side of the lens assembly to form an arc-shaped structure, when the movable plate moves to any position towards the fixed base plate along the Z-axis direction, the vertical distance between the highest point of the arch of the arc-shaped structure and the fixed base plate is smaller than the vertical distance between the lens assembly and the fixed base plate, the elastic sheet cantilevers are provided with at least two bent parts, and the bent parts are protruded towards one side close to the fixed base plate; and
and the driving assembly is connected between the fixed substrate and the movable plate and is used for driving the movable plate to move relative to the fixed substrate.
2. The optical anti-shake apparatus according to claim 1, wherein the at least two bending portions are disposed along an extending direction of the resilient cantilever.
3. The optical anti-shake apparatus according to claim 1 or 2, wherein the distance between the bending point of the at least two bending portions and any one end of the resilient cantilever is 1/10-7/10 of the length of the resilient cantilever.
4. The anti-shake apparatus according to any one of claims 1-3, wherein the pitch between any two adjacent bending portions is 0.5mm-5.0 mm.
5. The optical anti-shake apparatus according to any one of claims 1-4, wherein the number of the bent portions on the spring cantilever per unit length is 2-20/cm.
6. The optical anti-shake apparatus according to any one of claims 1-5, wherein the radius of curvature of the bent portion is 0.3mm-1.0 mm.
7. The optical anti-shake apparatus according to any one of claims 1-6, wherein the at least two bending portions are spaced from one end of the elastic cantilever fixed on the movable plate to one end fixed on the fixed substrate.
8. The optical anti-shake apparatus according to any one of claims 1-7, wherein the at least two resilient cantilevers are centrally symmetric with respect to the movable plate.
9. The optical anti-shake apparatus according to any one of claims 1-8, wherein an orthographic shape of the leaf spring cantilever on the fixed substrate is L-shaped, arc-shaped, or irregular.
10. The optical anti-shake apparatus according to any one of claims 1 to 9, wherein the movable plate is spaced from the fixed substrate by 0.05 to 0.35mm in the Z-axis direction.
11. The optical anti-shake apparatus according to any one of claims 1-10, wherein the drive assembly comprises a shape memory alloy wire drive assembly.
12. An optical anti-shake apparatus according to any one of claims 1 to 11, wherein the shape memory alloy wire drive assembly includes a plurality of shape memory alloy wires, each of which has one end fixed to the fixed base plate and the other end fixed to the movable plate.
13. The optical anti-shake apparatus according to any one of claims 1-12, wherein a first clamp for fixing the shape memory alloy wire is disposed at a pair of corners of the fixed substrate, a second clamp for fixing the shape memory alloy wire is disposed at a pair of corners of the movable plate, and the plurality of shape memory alloy wires are distributed around the periphery of the movable plate.
14. The optical anti-shake apparatus according to any one of claims 1-13, wherein the at least two resilient cantilever arms are integrally formed with the movable plate.
15. The optical anti-shake apparatus according to any one of claims 1-14, wherein the movable plate is provided with a light-transmitting through hole in the center for light signals to pass through.
16. The optical anti-shake apparatus according to any one of claims 1-15, wherein the at least two resilient cantilever arms are fixed to the fixed substrate by: bending the elastic sheet cantilever with one end fixed on the movable plate at least twice so as to lift the other end of the elastic sheet cantilever by a prepressing height in the Z-axis direction; wherein the spring plate cantilever and the movable plate are positioned on the same XY plane before the bending treatment; after the bending treatment, the movable plate is flatly placed on the fixed substrate, and then the other ends of the elastic sheet cantilevers are prepressed and fixed to the preset position of the fixed substrate, so that the at least two elastic sheet cantilevers are arched to one side departing from the fixed substrate to form an arc-shaped structure.
17. The optical anti-shake apparatus according to claim 16, wherein the bending angle of the bending process is 175 °.
18. A camera module, comprising an optical anti-shake apparatus and a lens assembly fixed on the optical anti-shake apparatus, wherein the optical anti-shake apparatus comprises:
fixing the substrate;
the movable plate is arranged on one side of the fixed substrate at preset intervals and used for mounting the lens assembly and driving the lens assembly to move in an XY plane;
the lens assembly comprises a movable plate, a lens assembly, at least two elastic sheet cantilevers, at least two bent parts and at least two elastic sheet cantilevers, wherein one end of each elastic sheet cantilever is fixed on the movable plate, the other end of each elastic sheet cantilever is fixed on the fixed base plate, the at least two elastic sheet cantilevers are arched towards one side of the lens assembly to form an arc-shaped structure, when the movable plate moves to any position towards the fixed base plate along the Z-axis direction, the vertical distance between the highest point of the arch of the arc-shaped structure and the fixed base plate is smaller than the vertical distance between the lens assembly and the fixed base plate, the elastic sheet cantilevers are provided with at least two bent parts, and the bent parts are protruded towards one side close to the fixed base plate; and
and the driving assembly is connected between the fixed substrate and the movable plate and is used for driving the movable plate to move relative to the fixed substrate.
19. The camera module of claim 18, wherein the lens assembly comprises a voice coil motor and a lens disposed in the voice coil motor, the voice coil motor is configured to drive the lens to automatically focus, and the optical anti-shake apparatus is configured to drive the voice coil motor to move in the XY-axis direction.
20. A mobile terminal comprising a housing assembly and a camera module mounted on the housing assembly, wherein the camera module is according to claim 18 or 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911426021.9A CN113132619B (en) | 2019-12-31 | 2019-12-31 | Optical anti-shake device, camera module and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911426021.9A CN113132619B (en) | 2019-12-31 | 2019-12-31 | Optical anti-shake device, camera module and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113132619A CN113132619A (en) | 2021-07-16 |
| CN113132619B true CN113132619B (en) | 2022-01-11 |
Family
ID=76771498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911426021.9A Active CN113132619B (en) | 2019-12-31 | 2019-12-31 | Optical anti-shake device, camera module and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113132619B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205987121U (en) * | 2016-08-25 | 2017-02-22 | 东莞市亚登电子有限公司 | Miniature optical anti -vibration camera module structure |
| CN107450251A (en) * | 2017-08-25 | 2017-12-08 | 高瞻创新科技有限公司 | A kind of spring system and the camera lens anti-shake apparatus using the spring system |
| CN207148494U (en) * | 2017-09-08 | 2018-03-27 | 洛阳同铸电子科技有限公司 | Driven by Ultrasonic Motors OIS optical anti-vibration modules |
| WO2019140721A1 (en) * | 2018-01-19 | 2019-07-25 | 信利光电股份有限公司 | Elastic element, focusing device and camera module |
| CN209201203U (en) * | 2018-08-30 | 2019-08-02 | 东莞市亚登电子有限公司 | The stabilization actuator of micro-optical stabilization drive motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5004579B2 (en) * | 2006-12-28 | 2012-08-22 | 日本電産サンキョー株式会社 | Lens drive device |
| JP5405622B2 (en) * | 2011-08-12 | 2014-02-05 | シャープ株式会社 | The camera module |
-
2019
- 2019-12-31 CN CN201911426021.9A patent/CN113132619B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205987121U (en) * | 2016-08-25 | 2017-02-22 | 东莞市亚登电子有限公司 | Miniature optical anti -vibration camera module structure |
| CN107450251A (en) * | 2017-08-25 | 2017-12-08 | 高瞻创新科技有限公司 | A kind of spring system and the camera lens anti-shake apparatus using the spring system |
| CN207148494U (en) * | 2017-09-08 | 2018-03-27 | 洛阳同铸电子科技有限公司 | Driven by Ultrasonic Motors OIS optical anti-vibration modules |
| WO2019140721A1 (en) * | 2018-01-19 | 2019-07-25 | 信利光电股份有限公司 | Elastic element, focusing device and camera module |
| CN209201203U (en) * | 2018-08-30 | 2019-08-02 | 东莞市亚登电子有限公司 | The stabilization actuator of micro-optical stabilization drive motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113132619A (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3782088B2 (en) | Leaf spring and lens actuator provided with the same | |
| CN110784625B (en) | Driving mechanism of photosensitive assembly | |
| EP2495604B1 (en) | Suspension wire for compensating for hand vibration and image photographing device having the same | |
| TWI718370B (en) | Micro optical zoom module | |
| US7929230B2 (en) | Camera lens module | |
| WO2013046996A1 (en) | Camera module | |
| US11852799B2 (en) | Prism device applied to periscope lens module and periscope lens module | |
| WO2022218261A1 (en) | Photographing apparatus and electronic device | |
| CN213365159U (en) | Lens driving device and electronic terminal | |
| CN112929520A (en) | Camera motor, camera module and electronic equipment | |
| CN108627947A (en) | Lens driver | |
| US20080013196A1 (en) | Auto-focus lens module | |
| CN113132619B (en) | Optical anti-shake device, camera module and mobile terminal | |
| CN110244448B (en) | Be applied to prism device and periscopic lens module of periscopic lens module | |
| EP2685309B1 (en) | Camera lens assembly with shock damping arrangement | |
| WO2021000160A1 (en) | Lens module | |
| CN114114601A (en) | Lens driving mechanism and frame thereof | |
| JP5679590B2 (en) | Small imaging device | |
| CN112817112A (en) | Lens driving device, camera device and electronic equipment | |
| US20230314902A1 (en) | Lens drive device | |
| CN217112852U (en) | Elastic sheet and lens driving device | |
| CN207010803U (en) | A kind of micro-optical zoom module | |
| CN215729124U (en) | Lens driving device, lens and electronic apparatus | |
| CN217546132U (en) | Elastic electric connection member, optical anti-shake device and camera module | |
| CN219843528U (en) | Lens anti-shake motor with pure moving coil structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |