A high-performance VCM motor, camera module and mobile terminal

Abstract

The utility model discloses a kind of high-performance VCM motor, camera module and mobile terminal, it is related to VCM motor technical field, including shell and the base of with the shell adaptation, carrier and the magnet that drives the carrier are equipped between the shell and the base, the carrier top is connected with the shell by upper spring piece, the carrier bottom is connected with the base by lower spring piece, and lens is equipped in carrier, the carrier two sides are respectively equipped with a group of OIS coil for controlling X or Y direction OIS performance symmetrically set. The utility model greatly improves the anti-shake signal amplification capacity, meets the anti-shake demand of complex scene such as motion photography. Meanwhile, the concentric circular winding groove structure with carrier center as circle center, guide copper wire forms closed annular magnetic circuit, magnetic flux uniformity improves and hysteresis loss reduces, motor response time shortens, effectively solve the response delay problem when high-frequency drive.

Description

Technical Field

[0001] This utility model relates to the field of VCM motor technology, specifically to a high-performance VCM motor, a camera module, and a mobile terminal. Background Technology

[0002] A VCM (Voice Coil Motor) is a type of motor used in electronics. Because its operating principle is similar to that of a loudspeaker, it is called a voice coil motor and is characterized by high frequency response and high precision. Its main principle is to control the stretching position of a spring by changing the magnitude of the direct current in the coil within a permanent magnetic field, thereby driving the motor's up-and-down movement. Mobile phone cameras widely use VCMs to achieve autofocus functionality; the VCM allows adjustment of the lens position to present a clear image.

[0003] In existing technologies, traditional VCM motors (voice coil motors), as the core driving component of camera modules, face significant technical bottlenecks in practical applications. On the one hand, their optical image stabilization (OIS) performance is severely limited. Traditional designs often employ a single-group, single-sided layout for OIS coils, enabling only unidirectional image stabilization control with insufficient signal amplification. This makes them unable to quickly respond to the X / Y axis bidirectional image stabilization requirements in complex shaking scenarios. Furthermore, traditional winding slots are mostly linear or discrete structures, preventing the copper wire wiring from forming a closed loop magnetic circuit. This results in uneven magnetic flux distribution, significantly increasing hysteresis losses during high-frequency driving and reducing motor response speed by approximately 30%. On the other hand, there are shortcomings in structural reliability and signal transmission capability. Under long-term high-frequency vibration, the stress of the traditional single spring structure is concentrated at the fixed end. After 6 months of actual use, the spring breakage failure rate is as high as 15%. The friction of copper wire in the straight winding groove causes the insulation layer damage rate to increase exponentially with the use time. After one year of use, the failure rate of a certain model of camera module due to wiring short circuit reached 28%. Moreover, the traditional two-part spring design can only support single-channel transmission of drive current, which cannot meet the new functional requirements such as dual OIS optical image stabilization. The traditional welded terminal also has problems such as insufficient connection strength and low production yield.

[0004] There are currently no effective solutions to the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a high-performance VCM motor, camera module and mobile terminal to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] The technical solution of this utility model is implemented as follows:

[0007] One aspect of this utility model is:

[0008] A high-performance VCM motor includes a housing and a base adapted to the housing. A carrier and a magnet for driving the carrier are disposed between the housing and the base. The top of the carrier is connected to the housing via an upper spring, and the bottom of the carrier is connected to the base via a lower spring. A lens is disposed inside the carrier. A set of OIS coils symmetrically arranged on both sides of the carrier for controlling the OIS performance in the X or Y direction are respectively provided. The set of OIS coils consists of at least two coils symmetrically arranged at the ends of the carrier. The bottom of the carrier is provided with a winding groove for arranging copper wires. The winding grooves are distributed concentrically with the center of the carrier as the center, and the copper wires for arranging the OIS coils form a ring magnetic circuit.

[0009] The lower spring is connected to several terminals, which are embedded in the base, and adjacent terminals are separated by an insulating gap.

[0010] Furthermore, the winding groove is integrally formed with the carrier through stamping, injection molding, or milling processes.

[0011] Furthermore, the cross-section of the winding groove is trapezoidal or arc-shaped, and insulating ribs are provided on both sides of the winding groove to divide the winding groove into independent wiring areas.

[0012] Furthermore, the upper spring sheet includes an outer spring base and an inner spring base, wherein the inner spring base is embedded within the outer spring base, and the end of the inner spring base is connected to the end of the outer spring base.

[0013] Furthermore, the lower spring and several terminals are integrally formed.

[0014] Furthermore, the terminal is formed into an exposed connection part through a bending process, and the bending angle of the connection part is 90°±5°, and the bending radius is 0.1-0.3mm.

[0015] Furthermore, the base has a slot on one side that is adapted to the connecting part, and the terminal is snapped into the slot through the connecting part.

[0016] Another aspect of this utility model:

[0017] A camera module including the high-performance VCM motor described above.

[0018] Another aspect of this utility model:

[0019] A mobile terminal includes the camera module described above.

[0020] The mobile terminal includes any one of a mobile phone, a laptop computer, or an information terminal.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model utilizes two sets of OIS coils symmetrically arranged on both sides of the carrier to fully leverage space. Through an independent X / Y axis drive mechanism, it can respond in real time to complex shaking scenarios. Compared with the traditional single-coil design, the amplification capability of the anti-shake signal is significantly improved, meeting the anti-shake requirements of complex scenarios such as sports photography. At the same time, the concentric circular winding groove structure with the center of the carrier as the center guides the copper wire to form a closed ring magnetic circuit, improving the uniformity of magnetic flux and reducing hysteresis loss, shortening the motor response time, and effectively solving the response delay problem in high-frequency drive.

[0023] 2. This utility model features an upper spring sheet with an embedded design of an outer spring base and an inner spring base. Through a stress dispersion mechanism, the breakage failure rate is significantly reduced. The insulating ribs on both sides of the winding groove achieve independent wiring partitioning, reducing copper wire friction loss. Meanwhile, the lower spring sheet and terminal are integrally formed, and the bent connection part and the slot snap-fit ​​structure result in a low terminal detachment rate and high connection strength. In addition, multiple terminals are separated by insulating gaps, enabling independent transmission of drive current, feedback signals, and other signals through multiple channels, meeting the requirements of dual OIS image stabilization and multi-camera collaborative control, while maintaining a small module thickness. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a split schematic diagram of a high-performance VCM motor according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of a carrier for a high-performance VCM motor according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of a base for a high-performance VCM motor according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the housing of a high-performance VCM motor according to an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the upper spring plate of a high-performance VCM motor according to an embodiment of the present utility model.

[0030] In the picture:

[0031] 1. Housing; 2. Base; 3. Carrier; 4. Magnet; 5. Upper spring; 6. Lens; 7. OIS coil; 8. Winding groove; 9. Terminal; 10. Lower spring; 11. Insulating rib; 12. Connecting part; 13. Slot;

[0032] 51. Outer spring substrate; 52. Inner spring substrate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0034] According to an embodiment of the present invention, a high-performance VCM motor is provided.

[0035] like Figures 1-5 As shown, the high-performance VCM motor according to an embodiment of the present invention includes a housing 1 and a base 2 adapted to the housing 1. A carrier 3 and a magnet 4 for driving the carrier 3 are provided between the housing 1 and the base 2. The top of the carrier 3 is connected to the housing 1 through an upper spring piece 5, and the bottom of the carrier 3 is connected to the base 2 through a lower spring piece 10. A lens 6 is provided inside the carrier 3. A set of OIS coils 7 symmetrically arranged on both sides of the carrier 3 for controlling the OIS performance in the X or Y direction are provided. There are at least two OIS coils 7 symmetrically arranged at the ends of the carrier 3. The bottom of the carrier 3 is provided with a winding groove 8 for arranging copper wires. The winding groove 8 is distributed in concentric circles with the center of the carrier 3 as the center, and the copper wires for arranging the OIS coils 7 form a ring magnetic circuit. The lower spring piece 10 is connected to a number of terminals 9, which are embedded in the base 2, and adjacent terminals 9 are separated by an insulating gap.

[0036] In this technical solution, the OIS coils 7 are distributed at the corners of the carrier 3, which can make full use of the corner space. At the same time, the two sets of OIS coils 7 are used to control the OIS performance in the X or Y direction, which can effectively amplify the signal compared to a single set.

[0037] In addition, the winding groove 8 is integrally formed with the carrier 3 through stamping, injection molding or milling processes. The cross-section of the winding groove 8 is trapezoidal or arc-shaped, and insulating ribs 11 are provided on both sides of the winding groove 8 to divide the winding groove 8 into independent wiring areas.

[0038] This technical solution utilizes concentrically distributed winding slots 8 to guide the copper wires into a ring-shaped magnetic circuit, solving the problem that traditional straight winding slots cannot meet the requirements of ring-shaped wiring and avoiding copper wire tangling or stress concentration. Simultaneously, insulating ribs 11 isolate the copper wires of the coil, reducing friction in ring-shaped motion scenarios, lowering the risk of insulation damage, and reducing the occurrence of short circuits. This carrier structure is optimized for ring-shaped wiring and can adapt to the symmetrical ring layout of multiple coils, which is beneficial for the miniaturization design of the motor.

[0039] Additionally, the upper spring sheet 5 includes an outer spring base sheet 51 and an inner spring base sheet 52. The inner spring base sheet 52 is embedded in the outer spring base sheet 51, and the end of the inner spring base sheet 52 is connected to the end of the outer spring base sheet 51.

[0040] Specifically, the upper spring sheet 5 adopts an outer spring substrate 51 and an inner spring substrate 52, which reduces the design requirements for safety indicators such as stress of a single spring sheet and better meets the production capacity design and performance requirements.

[0041] In addition, the lower spring 10 and several terminals 9 are integrally formed. The terminals 9 are formed into exposed connecting parts 12 by a bending process. The bending angle of the connecting parts 12 is 90°±5° and the bending radius is 0.1-0.3mm. The base 2 has a slot 13 on one side to fit the connecting parts 12, and the terminals 9 are engaged in the slot 13 through the connecting parts 12.

[0042] Specifically, in application, there are at least six sets of terminals 9, and the six sets of terminals 9 are snapped into the slots 13 via the connecting part 12. The width of the insulation gap is 0.1-0.15mm. Through the multi-terminal design, multiple independent transmission channels for drive current, feedback signals, and auxiliary functions can be realized simultaneously. Compared with the traditional two-part spring contact, the circuit design flexibility is greatly improved, making it suitable for complex scenarios such as dual OIS optical image stabilization and multi-camera collaborative control.

[0043] This technical solution optimizes the connection between the lower spring 10 and the sub-spring 9, reducing the space occupied inside the motor, improving structural reliability, enhancing connection strength and conductivity stability, and simplifying the production process to meet the miniaturization and high reliability design requirements of mobile terminals. Furthermore, the multi-zoned terminal design with insulation gap separation solves the problem of single conductivity function in traditional two-part springs, enabling multi-channel independent conductivity and meeting the needs of complex circuit control.

[0044] According to an embodiment of the present invention, a camera module is provided, including the aforementioned high-performance VCM motor.

[0045] Specifically, in the implementation of the camera module, the aforementioned high-performance VCM motor is assembled as a core component, and combined with other related optical components and circuit components to form a complete camera module.

[0046] According to an embodiment of the present invention, a mobile terminal is provided, including the camera module described above.

[0047] Mobile terminals include any one of mobile phones, laptops, or information terminals.

[0048] Specifically, in the implementation of mobile terminals, a camera module containing the aforementioned high-performance VCM motor will be installed in mobile devices such as mobile phones, laptops, or information terminals to enable the mobile terminal to take photos and videos.

[0049] In summary, the following effects can be achieved by utilizing the above-described technical solution of this utility model:

[0050] 1. This utility model utilizes two sets of OIS coils symmetrically arranged on both sides of the carrier, with an independent X / Y axis drive mechanism, to respond in real time to complex shaking scenarios. Compared to traditional single-coil designs, the amplification capability of the anti-shake signal is significantly improved, meeting the anti-shake requirements of complex scenarios such as sports photography. Simultaneously, the concentric circular winding groove structure centered on the carrier guides the copper wires to form a closed-loop magnetic circuit, improving magnetic flux uniformity and reducing hysteresis loss, thus shortening the motor response time and effectively solving the response delay problem during high-frequency drive.

[0051] 2. This utility model features an upper spring sheet with an embedded design of an outer spring base and an inner spring base. Through a stress dispersion mechanism, the breakage failure rate is significantly reduced. The insulating ribs on both sides of the winding groove achieve independent wiring partitioning, reducing copper wire friction loss. Meanwhile, the lower spring sheet and terminal are integrally formed, and the bent connection part and the slot snap-fit ​​structure result in a low terminal detachment rate and high connection strength. In addition, multiple terminals are separated by insulating gaps, enabling independent transmission of drive current, feedback signals, and other signals through multiple channels, meeting the requirements of dual OIS image stabilization and multi-camera collaborative control, while maintaining a small module thickness.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art, upon considering the disclosure in the specification and embodiments, will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0053] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A high-performance VCM motor, comprising a housing (1) and a base (2) adapted to the housing (1), wherein a carrier (3) and a magnet (4) for driving the carrier (3) are provided between the housing (1) and the base (2), the top of the carrier (3) is connected to the housing (1) via an upper spring piece (5), the bottom of the carrier (3) is connected to the base (2) via a lower spring piece (10), and a lens (6) is provided inside the carrier (3), characterized in that, The carrier (3) has a set of OIS coils (7) symmetrically arranged on both sides for controlling the OIS performance in the X or Y direction. The set of OIS coils (7) consists of at least two coils symmetrically arranged at the ends of the carrier (3). The bottom of the carrier (3) has a winding groove (8) for arranging copper wires. The winding groove (8) is arranged in concentric circles with the center of the carrier (3) as the center, and the copper wires of the OIS coils (7) are arranged to form a ring magnetic circuit. The lower spring (10) is connected to a plurality of terminals (9), which are embedded in the base (2) and adjacent terminals (9) are separated by an insulating gap.

2. The high-performance VCM motor according to claim 1, characterized in that, The winding groove (8) is integrally formed with the carrier (3) by stamping, injection molding or milling process.

3. The high-performance VCM motor according to claim 2, characterized in that, The cross-section of the winding groove (8) is trapezoidal or arc-shaped, and insulating ribs (11) are provided on both sides of the winding groove (8) to divide the winding groove (8) into independent wiring areas.

4. The high-performance VCM motor according to claim 1, characterized in that, The upper spring sheet (5) includes an outer spring base sheet (51) and an inner spring base sheet (52), wherein the inner spring base sheet (52) is embedded in the outer spring base sheet (51), and the end of the inner spring base sheet (52) is connected to the end of the outer spring base sheet (51).

5. The high-performance VCM motor according to claim 1, characterized in that, The lower spring sheet (10) and several terminals (9) are integrally formed.

6. The high-performance VCM motor according to claim 1, characterized in that, The terminal (9) is formed into an exposed connecting part (12) by a bending process. The bending angle of the connecting part (12) is 90°±5° and the bending radius is 0.1-0.3mm.

7. The high-performance VCM motor according to claim 6, characterized in that, The base (2) has a slot (13) on one side that is adapted to the connecting part (12), and the terminal (9) is snapped into the slot (13) through the connecting part (12).

8. A camera module, characterized in that, Includes the high-performance VCM motor according to any one of claims 1-7.

9. A mobile terminal, characterized in that, Includes the camera module as described in claim 8.

10. A mobile terminal according to claim 9, characterized in that, The mobile terminal includes any one of a mobile phone, a laptop computer, or an information terminal.

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