High-performance VCM motor, camera module and mobile terminal

Abstract

The invention discloses a high-performance VCM motor, a camera module and a mobile terminal, and relates to the technical field of VCM motors, the high-performance VCM motor comprises a shell and a base matched with the shell, a carrier and a magnet for driving the carrier are arranged between the shell and the base, the top of the carrier is connected with the shell through an upper elastic piece, and the upper elastic piece is connected with the shell through a lower elastic piece. The bottom of the carrier is connected with the base through a lower elastic sheet, a lens is arranged in the carrier, and two sides of the carrier are respectively provided with a group of OIS coils which are symmetrically arranged and used for controlling the OIS performance in the X direction or the Y direction. The anti-shake signal amplification capability is greatly improved, and the anti-shake requirement of complex scenes such as motion photography is met. Meanwhile, the concentric winding groove structure with the center of the carrier as the circle center guides the copper wire to form a closed annular magnetic circuit, the uniformity of magnetic flux is improved, the hysteresis loss is reduced, the response time of the motor is shortened, and the problem of response delay during high-frequency driving is effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of VCM motor technology, and in particular to a high-performance VCM motor, a camera module, and a mobile terminal. Background Art

[0002] A VCM (Voice Coil Motor), also known as a voice coil motor in electronics, is a type of motor. It's called a voice coil motor because its principle is similar to that of a speaker. It features high-frequency response and high precision. Its main principle is to control the tension of a spring by varying the DC current flowing through the motor's coil within a permanent magnetic field, thereby driving its up and down motion. Mobile phone cameras widely use VCMs for autofocus, allowing them to adjust the lens position for clear images.

[0003] In existing technologies, traditional VCM motors (voice coil motors), the core driving components of camera modules, face significant technical bottlenecks in practical applications. Their optical image stabilization (OIS) performance is significantly limited. Traditional designs often utilize a single OIS coil on a single side, enabling only unidirectional image stabilization and insufficient signal amplification. This makes it impossible to quickly respond to X / Y axis bidirectional image stabilization requirements in complex vibration scenarios. Furthermore, traditional winding slots are mostly linear or discrete structures, and copper wire wiring cannot form a closed loop magnetic circuit, resulting in uneven magnetic flux distribution. This significantly increases hysteresis losses during high-frequency operation, reducing motor response speed by approximately 30%. On the other hand, there are deficiencies in structural reliability and signal transmission capabilities. Under long-term high-frequency vibration, the traditional single-shrapnel structure concentrates stress on the fixed end. The actual test shows that the failure rate of shrapnel breakage is as high as 15% after 6 months of use. The friction of copper wire in the linear 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%; and the traditional two-part shrapnel design can only support single-channel transmission of driving current, and cannot meet the requirements of new functions such as dual OIS optical image stabilization. Traditional welding terminals also have problems such as insufficient connection strength and low production yield.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0005] In response to the problems in the related art, the present invention proposes a high-performance VCM motor, a camera module and a mobile terminal to overcome the above-mentioned technical problems existing in the existing related art.

[0006] The technical solution of the present invention is achieved as follows:

[0007] In one aspect, the present invention:

[0008] A high-performance VCM motor includes a housing and a base adapted for 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 plate, and the bottom of the carrier is connected to the base via a lower spring plate. A lens is disposed within the carrier. A set of symmetrically arranged OIS coils for controlling X- and Y-direction optical isolation (OIS) performance are disposed on either side of the carrier. Each set of OIS coils comprises at least two coils symmetrically disposed at the ends of the carrier. Winding grooves for arranging copper wire are disposed at the bottom of the carrier. The winding grooves are arranged concentrically with the center of the carrier as the center, forming a circular magnetic circuit for arranging the copper wire of the OIS coils.

[0009] The lower elastic sheet is connected to a plurality of terminals, the plurality of terminals are embedded in the base, and adjacent terminals are separated by insulating gaps.

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

[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 for dividing the winding groove into independent wiring areas.

[0012] Furthermore, the upper elastic sheet includes an outer elastic sheet and an inner elastic sheet, wherein the inner elastic sheet is embedded in the outer elastic sheet, and an end portion of the inner elastic sheet is connected to an end portion of the outer elastic sheet.

[0013] Furthermore, the lower spring sheet and the plurality of terminals are integrally formed.

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

[0015] Furthermore, a slot adapted to the connecting portion is provided on one side of the base, and the terminal is snapped into the slot through the connecting portion.

[0016] Another aspect of the present invention is:

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

[0018] Another aspect of the present invention is:

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

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

[0021] Beneficial effects of the present invention:

[0022] 1. This invention utilizes two sets of OIS coils symmetrically arranged on either side of the carrier, fully utilizing space. Through independent X / Y-axis drive mechanisms, it can respond to complex shaking scenarios in real time. Compared to traditional single-coil designs, the anti-shake signal amplification capability is significantly improved, meeting the anti-shake requirements of complex scenes such as motion photography. Furthermore, a concentric winding groove structure centered on the carrier guides the copper wire to form a closed circular magnetic circuit, improving magnetic flux uniformity and reducing hysteresis losses, shortening motor response time and effectively addressing response delay issues during high-frequency drive.

[0023] 2. The upper spring plate of this invention utilizes an embedded design with an outer spring substrate and an inner spring substrate. This stress-dispersing mechanism significantly reduces the breakage failure rate. Insulating ribs on either side of the winding slot enable independent wiring partitions, reducing copper wire friction loss. Furthermore, the lower spring plate and terminal are integrally molded, with a bent connection and a slot-engaging structure, resulting in a low terminal dropout rate and high connection strength. Furthermore, multiple terminals are separated by insulating gaps, enabling independent multi-channel transmission of drive current, feedback signals, and other signals, meeting the requirements of dual OIS (Optical Image Stabilization) and multi-camera coordinated control, while maintaining a low module thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 1. is a schematic diagram of a high-performance VCM motor according to an embodiment of the present invention;

[0026] Figure 2 2. A schematic diagram of a carrier of a high-performance VCM motor according to an embodiment of the present invention;

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

[0028] Figure 4 2 is a schematic diagram of a housing of a high-performance VCM motor according to an embodiment of the present invention;

[0029] Figure 5 Schematic diagram of an upper spring plate of a high-performance VCM motor according to an embodiment of the present invention.

[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. Insulation rib; 12. Connector; 13. Slot

[0032] 51. External elastic substrate; 52. Internal elastic substrate. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

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

[0035] like Figure 1-Figure 5 As shown, a 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 via an upper spring plate 5, and the bottom of the carrier 3 is connected to the base 2 via a lower spring plate 10. A lens 6 is provided inside the carrier 3. A group of OIS coils 7 are symmetrically arranged on both sides of the carrier 3 for controlling the OIS performance in the X or Y direction. A group of OIS coils 7 consists of at least two and are symmetrically arranged at the ends of the carrier 3. A winding groove 8 for arranging copper wire is provided at the bottom of the carrier 3. The winding grooves 8 are distributed in concentric circles with the center of the carrier 3 as the center, and the copper wire for arranging the OIS coil 7 forms a ring magnetic circuit; the lower spring plate 10 is connected to a plurality of terminals 9, and the plurality of terminals 9 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 end of the carrier 3, which can fully utilize the corner space. At the same time, two groups 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 group.

[0037] In addition, the winding groove 8 is integrally formed with the carrier 3 by stamping, injection molding or milling. 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 separate the winding groove 8 into independent wiring areas.

[0038] This technical solution, through concentrically arranged winding grooves 8, guides the copper wire to form a circular magnetic circuit, resolving the problem of traditional linear winding grooves being unable to meet the requirements of circular wiring and preventing cross-entanglement or stress concentration in the copper wire. Furthermore, insulating ribs 11 isolate the copper wires of the coils, reducing friction in the circular motion, lowering the risk of insulation damage and minimizing short circuits. This carrier structure is optimized for circular wiring and can accommodate the symmetrical circular layout of multiple coils, facilitating the miniaturization of motor design.

[0039] In addition, the upper elastic plate 5 includes an outer elastic base plate 51 and an inner elastic base plate 52 . The inner elastic base plate 52 is embedded in the outer elastic base plate 51 , and an end portion of the inner elastic base plate 52 is connected to an end portion of the outer elastic base plate 51 .

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

[0041] The lower spring 10 and several terminals 9 are integrally formed. The terminals 9 are bent to form exposed connecting portions 12, with a bending angle of 90°±5° and a bending radius of 0.1-0.3mm. A slot 13 is provided on one side of the base 2 to accommodate the connecting portion 12, and the terminals 9 are snapped into the slot 13 via the connecting portion 12.

[0042] Specifically, in use, there are at least six groups of terminals 9, and these six groups of terminals 9 are snapped into slots 13 via connectors 12. The width of the insulation gap is 0.1-0.15mm. This multi-terminal 9 design enables simultaneous, independent transmission of multiple channels, including drive current, feedback signals, and auxiliary functions. Compared to traditional two-part springs, this significantly improves circuit design flexibility and is 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 clip 10 and the sub-cable 9, reducing internal motor space and improving structural reliability. It also enhances connection strength and conductive stability, simplifying the production process and meeting the design requirements of miniaturized and highly reliable mobile terminals. Furthermore, the multi-partition terminal design, separated by an insulating gap, addresses the single conductive function of traditional two-part spring clips, achieving multi-channel independent conduction to meet the control needs of complex circuits.

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

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

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

[0047] The mobile terminal includes any one of a mobile phone, a laptop computer or an information terminal.

[0048] Specifically, in the implementation of a mobile terminal, a camera module containing the above-mentioned high-performance VCM motor is installed in a mobile device such as a mobile phone, a laptop computer or an information terminal to realize the functions of taking photos and videos of the mobile terminal.

[0049] In summary, with the help of the above technical solution of the present invention, the following effects can be achieved:

[0050] 1. This invention utilizes two sets of OIS coils symmetrically positioned on either side of the carrier, driven by independent X / Y-axis drive mechanisms, to respond in real time to complex shaking scenarios. Compared to traditional single-coil designs, this significantly improves anti-shake signal amplification, meeting the anti-shake requirements of complex scenes such as motion photography. Furthermore, a concentric winding groove structure centered on the carrier guides the copper wire to form a closed circular magnetic circuit, improving magnetic flux uniformity and reducing hysteresis losses, shortening motor response time and effectively addressing response delay issues during high-frequency drive.

[0051] 2. The upper spring plate of this invention utilizes an embedded design with an outer spring substrate and an inner spring substrate. This stress-dispersing mechanism significantly reduces the breakage failure rate. Insulating ribs on either side of the winding slot enable independent wiring partitions, reducing copper wire friction loss. Furthermore, the lower spring plate and terminal are integrally molded, with a bent connection and a slot-engaging structure, resulting in a low terminal dropout rate and high connection strength. Furthermore, multiple terminals are separated by insulating gaps, enabling independent multi-channel transmission of drive current, feedback signals, and other signals, meeting the requirements of dual OIS (Optical Image Stabilization) and multi-camera coordinated control, while maintaining a low 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 will readily conceive of other embodiments of the present invention after considering the disclosure in the specification and examples. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed in the present invention. The description and examples are to be considered merely exemplary, and the true scope and spirit of the present invention are indicated by the claims.

[0053] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present 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), a carrier (3) and a magnet (4) for driving the carrier (3) being provided between the housing (1) and the base (2), the top of the carrier (3) being connected to the housing (1) via an upper spring plate (5), the bottom of the carrier (3) being connected to the base (2) via a lower spring plate (10), and a lens (6) being provided in the carrier (3), characterized in that: A group of OIS coils (7) for controlling the OIS performance in the X-direction or the Y-direction are respectively provided on both sides of the carrier (3), the group of OIS coils (7) being at least two and symmetrically arranged at the ends of the carrier (3), and a winding groove (8) for arranging copper wires is provided at the bottom of the carrier (3), the winding grooves (8) being distributed in concentric circles with the center of the carrier (3) as the center, and being used to arrange the copper wires of the OIS coils (7) to form a ring-shaped magnetic circuit; The lower spring sheet (10) is connected to a plurality of terminals (9), the plurality of terminals (9) are embedded in the base (2), and adjacent terminals (9) are separated by insulating gaps.

2. The high-performance VCM motor according to claim 1, characterized in that: The winding groove (8) is integrally formed with the carrier (3) through a 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) for separating the winding groove (8) into independent wiring areas.

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

5. The high performance VCM motor according to claim 1, characterized in that: The lower spring piece (10) and the plurality of 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 portion (12) through a bending process, and the bending angle of the connecting portion (12) is 90°±5°, and the bending radius is 0.1-0.3 mm.

7. The high performance VCM motor according to claim 6, characterized in that: A slot (13) adapted to the connecting portion (12) is provided on one side of the base (2), and the terminal (9) is snap-connected to the slot (13) via the connecting portion (12).

8. A camera module, characterized in that: A high-performance VCM motor comprising any one of claims 1-7.

9. A mobile terminal, characterized in that: Including the camera module described in claim 8.

10. The mobile terminal according to claim 9, wherein: The mobile terminal includes any one of a mobile phone, a notebook computer or an information terminal.

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