Ball type anti-shake motor and electronic equipment
By using a spring structure and capacitor detection in a ball-type anti-shake motor, the problem of separation between the mover and the circuit board was solved, achieving high-precision displacement detection and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-03-24
AI Technical Summary
In existing ball-type anti-shake motors, the ball bearings, acting as a transmission mechanism, cause the mover to separate from the circuit board, requiring additional wiring design. Furthermore, the magnetic field detection method is easily affected by the environment, resulting in poor detection performance.
A spring-loaded structure is used to connect the second mover to the circuit board, and a capacitor detection structure is used to realize displacement detection. The movement of the mover is detected by the first and second detection units, which reduces detection costs and improves accuracy.
It achieves high-precision displacement detection, reduces detection costs, and avoids the complexity of additional wire design and environmental interference.
Smart Images
Figure CN224037223U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to camera technology field especially relates to a ball type anti shake motor and electronic equipment. BACKGROUND
[0002] Ball type anti shake motor drives the ball to roll in the rolling groove arranged on the mover through electromagnetic force, and then drives the mover to move, real-time offsets the displacement deviation caused by external vibration, thereby realizing focusing and optical anti shake.
[0003] The inventor finds that the ball type anti shake motor at least has the following disadvantages: the ball is used as the transmission mechanism of the motor, which leads to the separation of the mover and the circuit board in the motor, and leads to the need of additional design of the wire circuit for the elements such as sensors or coils that need to be electrically connected if they are arranged on the mover. The additional design of the wire circuit may even affect the movement of the mover. In order to avoid the additional design of the wire circuit, the magnetic field detection method is usually used to determine the movement of the mover. However, the magnetic field detection method is easily affected by the environment, leading to poor detection effect. UTILITY MODEL CONTENT
[0004] The utility model embodiment aims at providing a ball type anti shake motor and electronic equipment, which connects the spring sheet structure for limiting the second mover with the circuit board, and then realizes the electrical connection of the second emitter plate of the second detection unit by means of the spring sheet structure, and then forms the capacitor detection structure by means of the second floating plate and the second receiver plate arranged on the circuit board, realizes the capacitive displacement detection of the ball type anti shake motor, improves the displacement detection precision, and reduces the detection cost.
[0005] To solve the above-mentioned technical problems, embodiments of this utility model provide a ball-type image stabilization motor, comprising: a first mover, a second mover, a first ball, a second ball, a first detection unit, a second detection unit, a circuit board, and a base; the first mover utilizes the first ball to generate relative displacement with the base in the focusing direction; the second mover utilizes the second ball to generate relative displacement with the base in the shaking direction; wherein, the shaking direction is perpendicular to the focusing direction; the circuit board is disposed on the side wall of the base; the first detection unit includes a first emitting electrode plate and a first receiving electrode plate disposed on the circuit board, and a [missing information - likely a component or element] disposed on the side of the first mover. The first floating electrode plate and the first detection unit are used to detect the movement of the first mover; the second detection unit includes: a second floating electrode plate disposed on the first mover, a second receiving electrode plate disposed on the circuit board, and a second emitting electrode plate disposed on the second mover, wherein the second floating electrode plate, the second emitting electrode plate, and the second receiving electrode plate are all disposed opposite to each other, and the second detection unit is used to detect the movement of the second mover; the ball bearing image stabilization motor further includes: a spring sheet structure electrically connected to the circuit board, the spring sheet structure being used to limit the second mover in the focusing direction; the second emitting electrode plate is electrically connected to the spring sheet structure.
[0006] An embodiment of this utility model also provides an electronic device, including the aforementioned ball-type anti-shake motor.
[0007] Compared to existing technologies, this embodiment of the invention includes a first detection unit comprising a first emitting electrode plate and a first receiving electrode plate disposed on a circuit board, and a first floating electrode plate disposed on the side of a first mover. The first detection unit detects the movement of the first mover in the focusing direction. The second detection unit comprises a second floating electrode plate disposed on the first mover, a second receiving electrode plate disposed on the circuit board, and a second emitting electrode plate disposed on the second mover. The second detection unit detects the movement of the second mover in the shaking direction. A spring contact structure is electrically connected to the circuit board, which limits the movement of the second mover in the focusing direction. The second emitting electrode plate is electrically connected to the spring contact structure. The second floating electrode plate and the second receiving electrode plate on the circuit board together form a capacitor structure for detecting the movement of the second mover. The spring contact structure indirectly connects the second detection unit to the circuit board. This invention achieves capacitive displacement detection to limit the ball-bearing anti-shake motor, improving displacement detection accuracy while reducing detection costs.
[0008] In addition, the second floating electrode plate extends from the bottom of the first mover toward the side of the first mover. The portion of the second floating electrode plate located at the bottom of the first mover is opposite to the position of the second transmitting electrode plate, and the portion of the second floating electrode plate located on the side of the first mover is opposite to the position of the second receiving electrode plate.
[0009] In addition, the second emitting electrode plate includes an X-axis emitting electrode plate and a Y-axis emitting electrode plate, which are interconnected, and one of the X-axis emitting electrode plate and the Y-axis emitting electrode plate is connected to the spring sheet structure.
[0010] In addition, the second receiving electrode plate includes an X-axis receiving electrode plate and a Y-axis receiving electrode plate, and there are two X-axis receiving electrode plates and two Y-axis receiving electrode plates.
[0011] In addition, there are four spring-loaded structures, any one of which is connected to one of the X-axis emitting plates and the Y-axis emitting plates, and the spring-loaded structure connected to one of the X-axis emitting plates and the Y-axis emitting plates is electrically connected to the circuit board.
[0012] In addition, the four spring-loaded structures are respectively disposed at the four apex corners of the quadrangular prism structure formed by the circuit board, and the four spring-loaded structures are in the same plane.
[0013] In addition, the ball bearing image stabilization motor further includes: a drive unit; the drive unit includes: a first drive magnet disposed on the first mover, and a first drive coil disposed on the base, the first drive magnet being disposed opposite to the first drive coil for driving the first mover to move in the focusing direction; the drive unit also includes: a second drive magnet disposed on the second mover, and a second drive coil disposed on the base, the second drive magnet being disposed opposite to the second drive coil for driving the second mover to move in the shaking direction.
[0014] In addition, there are two first receiving plates, which are arranged sequentially in the focusing direction.
[0015] In addition, the ball bearing image stabilization motor also includes: a pressure cap that fits against the second mover; the pressure cap abuts against the second mover in the focusing direction, and the pressure cap cooperates with the spring structure to restrict the movement of the second mover in the focusing direction. Attached Figure Description
[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0017] Figure 1 This is an exploded structural diagram of the ball bearing anti-shake motor according to an embodiment of this solution;
[0018] Figure 2 This is a schematic diagram of the combination of the circuit board and the first mover in the ball bearing anti-shake motor according to the embodiment of this solution;
[0019] Figure 3 This is a schematic diagram of the independent structure of the second moving part in the ball bearing anti-shake motor according to the embodiment of this solution;
[0020] Figure 4 This is a schematic diagram of the structure of the first detection unit in the ball bearing anti-shake motor according to an embodiment of this solution;
[0021] Figure 5 This is a schematic diagram of the structure of the second detection unit in the ball bearing anti-shake motor according to the embodiment of this solution;
[0022] Figure 6 This is a top view of the circuit board and the first mover assembly in the ball bearing anti-shake motor according to an embodiment of this solution.
[0023] Figure 7 This is a top view of the circuit board and the second mover assembly in the ball bearing anti-shake motor according to an embodiment of this solution.
[0024] Figure 8 This is a schematic diagram of the relevant parameters of the second floating electrode plate and the second receiving electrode plate in the ball bearing anti-shake motor according to the embodiment of this solution;
[0025] Figure 9 This is a schematic diagram of the relevant parameters of the second floating electrode plate and the second emitting electrode plate in the ball bearing anti-shake motor according to the embodiment of this solution;
[0026] Figure 10 This is a schematic diagram of the combination of the second mover and the pressure cover in the ball bearing anti-shake motor according to the embodiment of this solution. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this utility model to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.
[0028] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with or referenced by each other without contradiction.
[0029] Embodiments of this utility model relate to a ball-type anti-shake motor, such as... Figure 1 As shown, the ball-type image stabilization motor includes: a circuit board 1, a base 2, a first mover 31, a second mover 32, a first ball bearing 41, a second ball bearing 42, a first detection unit, and a second detection unit; the first mover 31 utilizes the first ball bearing 41 to achieve relative displacement with the base 2 in the focusing direction; the second mover 32 utilizes the second ball bearing 42 to achieve relative displacement with the base 2 in the shaking direction; wherein, the shaking direction is perpendicular to the focusing direction; the circuit board 1 is disposed on the side wall of the base 2. Figure 2 As shown, the first detection unit includes a first emitting electrode 52 and a first receiving electrode 53 disposed on the circuit board 1, and as shown in the figure. Figure 3 As shown, the first floating pole plate 51 is disposed on the side of the first moving part 31. Figure 3 (As indicated by the dashed line), the first detection unit is used to detect the movement of the first mover 31; the second detection unit includes: a second floating electrode plate disposed on the first mover, a second receiving electrode plate disposed on the circuit board, and a second emitting electrode plate disposed on the second mover. The second floating electrode plate is disposed opposite to the second emitting electrode plate and the second receiving electrode plate. The second detection unit is used to detect the movement of the second mover; the ball bearing image stabilization motor also includes: a spring sheet structure 9 electrically connected to the circuit board 1. The spring sheet structure 9 is used to limit the second mover 32 in the focusing direction; the second emitting electrode plate is electrically connected to the spring sheet structure 9.
[0030] Compared to existing technologies, this embodiment of the invention includes a first detection unit comprising a first emitting electrode plate and a first receiving electrode plate disposed on a circuit board, and a first floating electrode plate disposed on the side of a first mover. The first detection unit detects the movement of the first mover in the focusing direction. The second detection unit comprises a second floating electrode plate disposed on the first mover, a second receiving electrode plate disposed on the circuit board, and a second emitting electrode plate disposed on the second mover. The second detection unit detects the movement of the second mover in the shaking direction. A spring contact structure is electrically connected to the circuit board, which limits the movement of the second mover in the focusing direction. The second emitting electrode plate is electrically connected to the spring contact structure. The second floating electrode plate and the second receiving electrode plate on the circuit board together form a capacitor structure for detecting the movement of the second mover. The spring contact structure indirectly connects the second detection unit to the circuit board. This invention achieves capacitive displacement detection to limit the ball-bearing anti-shake motor, improving displacement detection accuracy while reducing detection costs.
[0031] The structures of the first detection unit and the second detection unit are described below:
[0032] like Figure 2 to Figure 3 As shown, the first detection unit includes: a first floating electrode plate 51 disposed on the first mover 31, and a first emitting electrode plate 52 and a first receiving electrode plate 53 disposed on the circuit board 1; the first floating electrode plate 51 and the first emitting electrode plate 52 are disposed opposite each other in a direction perpendicular to the focusing direction, and the first floating electrode plate 51 and the first receiving electrode plate 53 are disposed opposite each other; when the first mover 31 moves in the focusing direction, the facing area of the first floating electrode plate 51 and the first receiving electrode plate 53 changes, while the facing area of the first floating electrode plate 51 and the first emitting electrode plate 52 remains unchanged.
[0033] The capacitor formed by the first floating plate 51, the first emitting plate 52, and the first receiving plate 53 can be considered as the sum of the capacitors formed by the first emitting plate 52 and the first floating plate 51, and the capacitors formed by the first floating plate 51 and the first receiving plate 53. The capacitance for each plate is calculated using the physical formula for a parallel plate capacitor: C = εS / 4πkd; where ε represents the dielectric constant, determined by the medium between the plates, such as air or water; and k represents the electrostatic constant, also known as the Coulomb constant, which indicates that the force between two point charges, each with a charge of 1C, separated by a distance of 1m in a vacuum is 8.987551 × 10⁹ N, i.e., k = 8.987551 × 10⁹ N·m. 2 / C; S represents the area (projected area) of the two plates facing each other; d represents the vertical distance between the two plates. Therefore, when the area of the first floating plate 51 and the first emitting plate 52 facing each other remains constant, the capacitance signal changes according to the area of the first floating plate 51 and the first receiving plate 53 facing each other. Since the change in the area of the first floating plate 51 and the first receiving plate 53 facing each other is related to the movement distance of the first moving element in the focusing direction, the movement distance of the first moving element in the focusing direction can be known from the change in the capacitance signal.
[0034] The first detection unit contains two first receiving plates 53; the two first receiving plates 53 are arranged sequentially in the focusing direction; when the first mover 31 moves in the focusing direction, the first change in the area of the first floating plate 51 facing one of the first receiving plates 53 is equal to the second change in the area of the first floating plate 51 facing the other first receiving plate 53. That is, the decrease in the area of the first floating plate facing one of the first receiving plates is the same as the increase in the area of the first floating plate facing the other first receiving plate, or the increase in the area of the first floating plate facing one of the first receiving plates is the same as the decrease in the area of the first floating plate facing the other first receiving plate. This design facilitates subsequent differential calculation of the capacitance signal for correction or noise reduction, eliminating noise that affects the accuracy of the calculation results due to environmental factors or human operation, and improving the sensitivity of lens position movement control. The differential calculation formula can be: amplification factor * (CX1-CX2) / (CX1+CX2); where CX1 represents the capacitance signal formed by the first floating electrode and one of the first receiving electrodes, and CX2 represents the capacitance signal formed by the first floating electrode and the other first receiving electrode.
[0035] The capacitor structure composed of the first floating electrode 51, the first transmitting electrode 52, and the two first receiving electrodes 53 is as follows: Figure 4As shown, the size of the first floating electrode plate 51 is smaller than the size of the area jointly covered by the first emitting electrode plate 52 and the two first receiving electrode plates 53. This ensures that during the movement of the first floating electrode plate 51 driven by the first mover in the focusing direction, the first floating electrode plate 51 remains within the area jointly covered by the first emitting electrode plate 52 and the two first receiving electrode plates 53. That is, during the movement of the first floating electrode plate 51, the edge of the first floating electrode plate 51 will never exceed the edge of the first emitting electrode plate 52, and the edge of the first floating electrode plate 51 will also never exceed the edge of the first receiving electrode plate 53. The widest width H1 of the first floating electrode plate 51 in the focusing direction is smaller than the width H2 of the first emitting electrode plate 52 in the focusing direction, and H2-H1 is greater than or equal to the maximum stroke value of the first mover in the focusing direction. The length L1 of the first floating electrode plate 51 perpendicular to the focusing direction is smaller than the total length L2 of the area jointly covered by the first emitting electrode plate 52 and the two first receiving electrode plates 53.
[0036] The second detection unit includes: a second floating electrode plate disposed on the first mover, a second receiving electrode plate disposed on a circuit board, and a second transmitting electrode plate disposed on the second mover. The second floating electrode plate is disposed opposite to the second transmitting electrode plate and the second receiving electrode plate. The second detection unit is used to detect the movement of the second mover. The second floating electrode plate extends from the bottom of the first mover toward the side of the first mover. The portion of the second floating electrode plate located at the bottom of the first mover is opposite to the second transmitting electrode plate, and the portion of the second floating electrode plate located on the side of the first mover is opposite to the second receiving electrode plate.
[0037] like Figure 5As shown, the second emitting electrode includes an X-axis emitting electrode 612 and a Y-axis emitting electrode 622, which are interconnected, and one of them is connected to the spring structure 9. The second receiving electrode includes an X-axis receiving electrode 613 and a Y-axis receiving electrode 623. The second floating electrode includes an X-axis floating electrode 611 and a Y-axis floating electrode 621. Because the X-axis emitting electrode 612 and the X-axis receiving electrode 613 are not positioned relative to each other due to the limitations of the motor structure, a bent X-axis floating electrode 611 is provided. This bent X-axis floating electrode 611 has portions opposite to both the X-axis emitting electrode 612 and the X-axis receiving electrode 613. The X-axis emitting electrode 612, in cooperation with the X-axis receiving electrode 613 via the X-axis floating electrode 611, is used to detect the movement distance of the second mover in the first direction (X-axis direction). Similarly, the Y-axis emitting electrode 622, in cooperation with the Y-axis receiving electrode 633 via the Y-axis floating electrode 631, is used to detect the movement distance of the second mover in the second direction (Y-axis direction). The first and second directions are perpendicular. The X-axis emitting electrode 612 and the Y-axis emitting electrode 622 can be connected by the same spring structure 9. To facilitate wiring, the X-axis emitting electrode 612 and the Y-axis emitting electrode 622 can be connected first using sheet metal or wires, and then one of the X-axis emitting electrode 612 and the Y-axis emitting electrode 622 can be connected to the spring structure 9.
[0038] In addition, such as Figure 6 As shown, the circuit board 1 and the first mover 31 are combined. The X-axis floating pole plate 611 and the Y-axis floating pole plate 621 are partially set in the bottom sub-region of the first mover. The X-axis floating pole plate 611 and the Y-axis floating pole plate 621 are set separately and do not require additional wiring.
[0039] like Figure 7 As shown, this is a combined structure of circuit board 1 and second mover 32. Both the X-axis emitting electrode 612 and the Y-axis emitting electrode 622 are disposed on the bottom surface of the second mover. The X-axis emitting electrode 612 is positioned opposite to a portion of the X-axis floating electrode 611 disposed at the bottom of the first mover, and the Y-axis emitting electrode 622 is positioned opposite to a portion of the Y-axis floating electrode 621 disposed at the bottom of the first mover. When the second mover moves relative to the first mover in the jitter direction, the facing area of the X-axis emitting electrode 612 relative to the X-axis floating electrode 611 changes, and / or the facing area of the Y-axis emitting electrode 622 relative to the Y-axis floating electrode 621 changes. The displacement in the X-axis direction and / or the displacement in the Y-axis direction are determined based on the change in the facing area.
[0040] There are two X-axis floating electrode plates 611 and two Y-axis floating electrode plates 621, such as Figure 8As shown, there are two X-axis floating pole plates 611 and two Y-axis floating pole plates 621 on the side of the first mover. Correspondingly, there are two X-axis receiving pole plates 613 and two Y-axis receiving pole plates 623. The two X-axis floating pole plates 611 and the two Y-axis floating pole plates 621 are independent of each other. The number of X-axis emitting pole plates 612 and Y-axis emitting pole plates 622 can each be set to one. The electric field lines in the second detection unit follow this pattern: the portion of the first X-axis floating pole plate located on the bottom surface of the first mover receives the electric field emitted by the X-axis emitting pole plate 612 and transmits it to the portion of the first X-axis floating pole plate located on the side of the first mover. Finally, the electric field reaches the first X-axis receiving pole plate, completing the first path of electric field transmission. The portion of the second X-axis floating electrode plate located on the bottom surface of the second mover receives the electric field emitted by the X-axis emitting electrode plate 612 and transmits the electric field to the portion of the second X-axis floating electrode plate located on the side of the first mover. Finally, the electric field reaches the second X-axis receiving electrode plate, completing the second electric field transmission. The driver IC reads the electrical signals of the X-axis emitting electrode plate and the two X-axis receiving electrode plates, and determines the distance the second mover has moved in the X-axis direction through differential calculation. The electric field transmission process and the detection method of the Y-axis movement distance of the other set of Y-axis emitting electrode plates 622, Y-axis floating electrode plates 621, and Y-axis receiving electrode plates 623 are the same as those of the X-axis electric field transmission process and the detection method of the X-axis movement distance, and will not be described again here.
[0041] There are four receiving spring structures 9. Each spring structure is connected to one of the X-axis emitting plates and the Y-axis emitting plates, and the spring structure connected to one of the X-axis emitting plates and the Y-axis emitting plates is electrically connected to the circuit board. The four spring structures are respectively located at the four vertices of the quadrangular prism structure formed by the circuit board, and the four spring structures are in the same plane.
[0042] like Figure 8 The diagram shows the structure of the X-axis floating electrode 611 and the X-axis receiving electrode 613, and the Y-axis floating electrode 621 and the Y-axis receiving electrode 623. During the movement of the first mover along the focusing direction, the facing areas of the X-axis floating electrode 611 and the X-axis receiving electrode 613 remain constant, as do the facing areas of the Y-axis floating electrode 621 and the Y-axis receiving electrode 623. That is, it is assumed that the distance *c* between the edge of the X-axis floating electrode 611 and the edge of the X-axis receiving electrode 613, and the distance *c* between the edge of the Y-axis floating electrode 621 and the edge of the Y-axis receiving electrode 623, must be greater than 2c of the maximum travel of the first mover in the focusing direction. This ensures that the movement of the first mover in the focusing direction does not interfere with the detection result of the jitter direction. Furthermore, the length *d* of the X-axis floating electrode 611 is greater than the length *e* of the X-axis receiving electrode 613, and the length *d* of the Y-axis floating electrode 621 is greater than the length *e* of the Y-axis receiving electrode 623.
[0043] like Figure 9 As shown, this is a structural schematic diagram of the X-axis floating electrode plate 611 and the X-axis emitting electrode plate 612, and the Y-axis floating electrode plate 621 and the Y-axis emitting electrode plate 622, along the first direction ( Figure 9 When the second mover moves along the left and right directions (as shown), the edge of the Y-axis floating electrode 621 will never exceed the edge of the Y-axis emitting electrode 622, that is, the difference between the length F1 of the Y-axis emitting electrode 622 and the length F2 of the Y-axis floating electrode 621 is greater than the maximum stroke of the second mover in the first direction. Similarly, when the second mover moves along the second direction (as shown), the edge of the Y-axis floating electrode 621 will never exceed the edge of the Y-axis emitting electrode 622, meaning the difference between the length F1 of the Y-axis emitting electrode 622 and the length F2 of the Y-axis floating electrode 621 is greater than the maximum stroke of the second mover in the first direction. Figure 9 When the second mover moves in the vertical direction (as shown), the edge of the X-axis floating electrode 611 will never exceed the edge of the X-axis emitting electrode 612. That is, the difference between the width G1 of the area formed by the two X-axis floating electrodes 621 and the width G2 of the X-axis emitting electrode 612 is greater than the maximum stroke of the second mover in the second direction. This arrangement ensures that the movement of the second mover in the first direction will not affect the capacitance signals generated by the Y-axis floating electrode 621 and the Y-axis emitting electrode 622, and that the movement of the second mover in the second direction will not affect the capacitance signals generated by the X-axis floating electrode 611 and the X-axis emitting electrode 612. This prevents crosstalk between the detection in the first and second directions, improving detection accuracy.
[0044] Additionally, a second receiving electrode plate or a lead-out point for a wire connected to the second receiving electrode plate is pre-embedded in the plastic parts of the motor. The lead-out point is typically located directly below the spring-loaded structure. Figure 9 As shown, a welding point 91 is reserved directly below each spring structure to facilitate the electrical connection between the spring structure and the second receiving electrode plate.
[0045] In addition, such as Figure 3 As shown, the ball-bearing image stabilization motor includes a drive unit comprising a first drive magnet 101 mounted on a first mover and a first drive coil mounted on a base. The first drive magnet 101 and the first drive coil are positioned opposite each other and are used to drive the first mover to move in the focusing direction. The first drive magnet 101 forms a fixed magnetic field. The first drive coil is connected to a circuit board and is powered and controlled by an external circuit and IC. When the first drive coil is energized, it generates an induced magnetic field, which interacts with the fixed magnetic field formed by the first drive magnet 101 to produce a Lorentz force. Since the first drive coil is fixed to the base 2 and cannot move, the Lorentz force is fed back to the first drive magnet 101. Due to the presence of the first ball bearing, the first mover 31, the carrier of the first drive magnet 101, can move relative to the base, thereby achieving the driving of the first mover. By changing the current in the first drive coil, the magnitude of the Lorentz force can be controlled, thereby changing the force on the first mover and controlling the distance of movement.
[0046] Similarly, regarding the driving force of the second mover, such asFigure 10 As shown, the driving unit includes a second driving magnet 102 disposed on the second mover and a second driving coil disposed on the base. The second driving magnet 102 and the second driving coil are disposed opposite to each other and are used to drive the second mover to move in the jitter direction. The driving principle is the same as that described above for the first mover.
[0047] The second mover can move in at least two directions (a first direction and a second direction), with corresponding second driving magnets and second driving coils set in each of the two different directions to achieve displacement control in different directions.
[0048] In addition, to ensure that the second mover is not driven by the first mover, and that the second mover only moves in the shaking direction and does not undergo displacement in the focusing direction, such as Figure 1 As shown, the ball bearing image stabilization motor also includes a pressure cover 7 that fits against the second mover 32; the pressure cover 7 abuts against the second mover 32 in the focusing direction, restricting the movement of the second mover 32 in the focusing direction. A welding point 91 between a spring structure and the second receiving electrode plate is provided at a corresponding position on the pressure cover 7, facilitating the electrical connection of the spring structure 9 to the second receiving electrode plate via the welding point 91 using methods such as laser spot welding.
[0049] In addition, such as Figure 1 As shown, the ball bearing anti-shake motor also includes a housing 8 covering the periphery of all component structures, which protects the internal structure of the ball bearing anti-shake motor.
[0050] To reduce the size of the ball bearing image stabilization motor, its internal components can be arranged in an overlapping manner in the focusing direction. For example, the second mover 32 can be placed inside the first mover 31, meaning the first mover 31 is a hollow frame structure with the central area used to accommodate the lens, and the frame surrounds the outer side of the second mover 32. This structure allows the second mover 32 to at least partially overlap with the first mover 31 in the focusing direction, reducing the thickness of the ball bearing image stabilization motor in that direction. Similarly, the base 2 also overlaps at least partially with the first mover 31 in the focusing direction, further reducing the thickness of the ball bearing image stabilization motor in that direction. The circuit board 1 is located on the side wall of the base 2, facilitating the electrical connection between the first and second detection units housed within the ball bearing image stabilization motor. The circuit board 1 can be a flexible printed circuit board (FPC), making it easier to fit the outer surface of the base.
[0051] Another feasible embodiment of this utility model relates to an electronic device, including the ball-type image stabilization motor as described above. The ball-type image stabilization motor is used in conjunction with a lens to achieve image acquisition and automatically calibrate against vibrations from the external environment, thereby improving the quality of image acquisition.
[0052] Compared with related technologies, the electronic device provided in this embodiment of the present invention is equipped with the ball-type anti-shake motor provided in the aforementioned embodiment. Therefore, it also has the same technical effects provided in the aforementioned embodiment, which will not be elaborated here.
[0053] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.
Claims
1. A ball-type anti-shake motor, characterized in that, include: First moving part, second moving part, first ball bearing, second ball bearing, first detection unit, second detection unit, circuit board and base; The first moving part uses the first ball to generate relative displacement with the base in the focusing direction; The second moving element utilizes the second ball bearing to achieve relative displacement with the base in the shaking direction; wherein, the shaking direction is perpendicular to the focusing direction; The circuit board is disposed on the side wall of the base; The first detection unit includes a first transmitting electrode plate and a first receiving electrode plate disposed on the circuit board, and a first floating electrode plate disposed on the side of the first moving part. The first detection unit is used to detect the movement of the first moving part. The second detection unit includes: a second floating electrode plate disposed on the first moving part, a second receiving electrode plate disposed on the circuit board, and a second transmitting electrode plate disposed on the second moving part. The second floating electrode plate, the second transmitting electrode plate, and the second receiving electrode plate are all disposed opposite to each other. The second detection unit is used to detect the movement of the second moving part. The ball bearing type image stabilization motor further includes: a spring structure electrically connected to the circuit board, the spring structure being used to limit the second mover in the focusing direction; the second emission electrode plate being electrically connected to the spring structure.
2. The ball bearing anti-shake motor according to claim 1, characterized in that, The second floating electrode plate extends from the bottom of the first mover toward the side of the first mover. The portion of the second floating electrode plate located at the bottom of the first mover is opposite to the second transmitting electrode plate, and the portion of the second floating electrode plate located on the side of the first mover is opposite to the second receiving electrode plate.
3. The ball bearing anti-shake motor according to claim 2, characterized in that, The second emitting electrode includes an X-axis emitting electrode and a Y-axis emitting electrode, which are interconnected, and one of the X-axis emitting electrode and the Y-axis emitting electrode is connected to the spring structure.
4. The ball-type anti-shake motor according to claim 2, characterized in that, The second receiving electrode plate includes an X-axis receiving electrode plate and a Y-axis receiving electrode plate, with two X-axis receiving electrode plates and two Y-axis receiving electrode plates.
5. The ball-type anti-shake motor according to claim 3, characterized in that, The number of spring-loaded structures is four. Any one of the spring-loaded structures is connected to one of the X-axis emitting plates and the Y-axis emitting plates, and the spring-loaded structure connected to one of the X-axis emitting plates and the Y-axis emitting plates is electrically connected to the circuit board.
6. The ball-type anti-shake motor according to claim 5, characterized in that, The four spring-loaded structures are respectively disposed at the four vertices of the quadrangular prism structure formed by the circuit board, and the four spring-loaded structures are in the same plane.
7. The ball-type anti-shake motor according to claim 1, characterized in that, Also includes: Drive unit; The driving unit includes: a first driving magnet disposed on the first moving part, and a first driving coil disposed on the base, wherein the first driving magnet and the first driving coil are disposed opposite to each other and are used to drive the first moving part to move in the focusing direction; The driving unit includes: a second driving magnet disposed on the second moving part, and a second driving coil disposed on the base. The second driving magnet and the second driving coil are disposed opposite to each other and are used to drive the second moving part to move in the jitter direction.
8. The ball-type anti-shake motor according to claim 1, characterized in that, There are two first receiving plates, which are arranged sequentially in the focusing direction.
9. The ball-type anti-shake motor according to any one of claims 1 to 8, characterized in that, Also includes: A pressure cap that fits the second moving part; The pressure cap abuts against the second mover in the focusing direction, and the pressure cap cooperates with the spring structure to restrict the movement of the second mover in the focusing direction.
10. An electronic device, characterized in that, include: The ball bearing anti-shake motor as described in any one of claims 1 to 9.