Voice coil motors, camera modules, and electronic devices

Abstract

A voice coil motor, a camera module, and electronic devices are provided. The voice coil motor is used in the camera module. The voice coil motor includes a support component (1), a transmitting component (2), and a lubrication structure (3). The transmitting component (2) moves relative to the support component (1). The lubrication structure (3) is positioned between the support component (1) and the transmitting component (2). The lubrication structure (3) includes a lubricating oil and a plurality of spherical particles dispersed in the lubricating oil. At least a portion of the plurality of spherical particles have one side in contact with the support component (1) and the other side in contact with the transmitting component (2). As the support component (1) and the transmitting component (2) move relative to each other, at least a portion of the plurality of spherical particles roll relative to the support component (1) and the transmitting component (2). Rolling friction is formed between the spherical particles and the transmitting component (2) and between the spherical particles and the support component (1), effectively reducing frictional resistance, reducing the steady-state power consumption of the motor, and also achieving a mute effect. Furthermore, the lubricating oil can form an oil film on the surface of the spherical particles so that the spherical particles can achieve a continuous lubrication effect during operation.

Description

Technical Field

[0001] This invention claims priority to Chinese Patent Application No. 202310021082.7, titled "VOICE COIL MOTOR, CAMERA MODULE, AND ELECTRONIC DEVICE", filed with the China National Intellectual Property Administration on January 6, 2023, which is hereby incorporated by reference in its entirety.

[0002] This application relates to the field of motor technology, particularly to voice coil motors, camera modules, and electronic devices.

Background Art

[0003] Currently, due to the rapid development of camera modules in mobile phones, motors have become an essential component of camera modules. Existing motors include a movable member and a fixed member. The movable member can move relative to the fixed member. However, usually, there is sliding friction between the movable member and the fixed member, the coefficient of dynamic friction is large, and the movable member needs to overcome extra frictional force during movement, resulting in high power consumption of the motor.

Summary of the Invention

[0004] The objective of this application is to provide a voice coil motor, a camera module, and an electronic device to solve the problem that the power consumption of existing motors is high because the motor needs to overcome the frictional force between the movable member and the fixed member.

[0005] A first aspect of the present application provides a voice coil motor. The voice coil motor is used in a camera module. The voice coil motor includes: a support component; a transmitting component, wherein the transmitting component moves relative to the support component; and a lubrication structure, wherein the lubrication structure is positioned between the support component and the transmitting component, and the lubrication structure includes a lubricating oil and a plurality of spherical particles dispersed in the lubricating oil, wherein at least a portion of the plurality of spherical particles has one side in contact with the support component and the other side in contact with the transmitting component, and as the support component and the transmitting component move relative to each other, at least a portion of the plurality of spherical particles rolls relative to the support component and the transmitting component.

[0006] As the transmitting component moves relative to the support component, the spherical particles are compressed and rolled by the transmitting and support components, potentially creating rolling friction between the transmitting component, support component, and spherical particles. The frictional force between the transmitting component, support component, and spherical particles is much smaller than the sliding frictional force between the transmitting and support components. Multiple spherical particles are dispersed, thereby creating rolling friction at multiple locations on the interface between the transmitting and support components, which are moving relative to each other, effectively reducing frictional resistance, lowering the steady-state power consumption of the motor, and potentially achieving a mute effect. Furthermore, the spherical particles are placed in a lubricating oil, which can form an oil film on the surface of the spherical particles. The oil film can further reduce friction between the spherical particles, the transmitting component, and the support component. In this way, even when the spherical particles roll, because the spherical particles are located within the lubricating oil, their surfaces can always be covered with an oil film, ensuring that a continuous lubrication effect can be achieved between the spherical particles and the transmitting and support components. Furthermore, because the lubricating oil has a specific viscosity, it can be ensured that the spherical particles adhere to the lubricating oil without separating. This improves the overall operational life of the lubrication structure.

[0007] In feasible design examples, the diameter of the spherical particles ranges from 10 μm to 500 μm.

[0008] The diameter size of the spherical particles is at the micron level and can match the gap between the transmitting component and the support component. The spherical particles may be in contact with both the transmitting component and the support component and may be covered with lubricating oil. This ensures a continuous lubricating effect in the movement of the spherical particles and the relative movement between the transmitting component and the support component, effectively reducing frictional resistance, further contributing to a reduction in the overall size of the motor, and enabling the implementation of a miniaturized design for the camera module. Furthermore, spherical particles within the size range also possess a certain structural strength and can maintain their shape without damage even when compressed by the transmitting component and the support component. This ensures the stability of the movement of the transmitting component relative to the support component.

[0009] In a feasible design example, the support component is provided with a first sliding surface. The first sliding surface is of the support component and is configured to slide against the transmitting component. The transmitting component is provided with a second sliding surface. The second sliding surface is of the transmitting component and is configured to slide against the support component. A lubrication structure is positioned between the first and second sliding surfaces. The first and second sliding surfaces can be, separately, one of a planar, curved, V-shaped, or U-shaped surface. In other words, the first and second sliding surfaces can be any two of the coordinating planar, curved, V-shaped, or U-shaped surfaces, thereby allowing for flexible arrangement of the sliding surfaces of the support and transmitting components.

[0010] In feasible design examples, one of the support component and the transmitting component is provided with a projection, and the other of the support component and the transmitting component is provided with a sliding slot. The transmitting component is slidably connected to the support component by a fit between the sliding slot and the projection. The lubrication structure is located between the sliding slot and the projection. The fit between the sliding slot and the projection can be understood as the direction of the recess in the slot body of the sliding slot being consistent with the direction of the projection of the projection.

[0011] The fit between the protruding and sliding slots provides guidance for the relative movement between the transmitting and supporting components, ensuring the stability of the transmitting component's movement relative to the supporting component.

[0012] In feasible design examples, the sliding slot is one of the following: an arc-shaped slot, a V-shaped slot, a U-shaped slot, or a trapezoidal slot. Regardless of the shape used, the protrusion can be guided, and the design of the sliding slot is more flexible. The lubrication structure is a solid-liquid two-phase structure containing liquid lubricant and solid spherical particles. Regardless of the shape used for the sliding slot, the lubrication structure can be positioned between the sliding slot and the protrusion without occupying additional space.

[0013] In feasible design examples, the cross-sectional shape of the projection is one of the following: semicircular, elliptical, U-shaped, triangular, or trapezoidal. Regardless of the shape used for the projection, a solid-liquid two-phase lubrication structure can be placed between the projection and the sliding slot to reduce friction between the transmitting and supporting components, thereby reducing the steady-state power consumption of the motor.

[0014] In feasible design examples, grooves are provided on at least one of the outer surface of the protrusion and the inner surface of the sliding slot. The lubrication structure is located in the groove. The depth of the groove is less than the diameter of the spherical particles. In this way, the lubrication structure can be restricted, and the lubricating oil and spherical particles can be prevented from diffusing irregularly.

[0015] In feasible design examples, the support component is provided with a guide shaft. The transmitting component is provided with a guide hole or guide slot. The guide hole or guide slot is slidably fitted over the guide shaft. The lubrication structure is located between the guide hole or guide slot and the guide shaft.

[0016] If the transmitting component is provided with a guide hole, the guide shaft may enter the guide hole, and the transmitting component may slide on the guide shaft through the guide hole. A lubrication structure may be filled between the inner wall of the guide hole and the guide shaft. If the transmitting component is provided with a guide slot, the guide slot may cover at least a portion of the outer circumference of the guide shaft in the circumferential direction, thereby allowing the transmitting component to slide on the guide shaft through the guide slot. A lubrication structure may be positioned between the guide slot and the guide shaft. In this way, the coordination between the transmitting component and the support component and the arrangement of the lubrication structure can be made more flexible.

[0017] In feasible design examples, grooves are provided on at least one of the outer surface of the guide shaft and the inner surface of the guide hole or guide slot. The lubrication structure is located in the grooves. Therefore, the lubrication structure can be prevented from flowing irregularly. The depth of the grooves is less than the diameter of the spherical particles. This ensures that at least a portion of the spherical particles can extend outside the grooves and come into contact with external components.

[0018] In feasible design examples, multiple grooves are spaced apart from each other in the direction in which the transmitting and supporting components slide against each other. Therefore, rolling friction can be formed by spherical particles over a large area where the transmitting component interacts with the supporting component, and lubrication can be implemented by using a lubricant. This improves the effect of reducing frictional force.

[0019] In a feasible design example, a single groove is provided, which extends continuously in the direction in which the transmitting and supporting components slide relative to each other. Thus, consistency in reducing frictional forces and improving lubrication between the transmitting and supporting components can be improved, and stable movement between the transmitting and supporting components can be ensured.

[0020] In a feasible design example, one of the support component and the transmitting component is provided with a first magnetic member, and the other of the support component and the transmitting component is provided with a second magnetic member or a magnetoconductive member. The support component and the transmitting component are compressed on both sides of at least a portion of a plurality of spherical particles by adsorption coordination between the first magnetic member and the second magnetic member or by adsorption coordination between the first magnetic member and the magnetoconductive member.

[0021] An attractive force is generated between the first magnetic member and the second magnetic member or magnetoconductive member. Due to this attractive force, the outer surface of one side of the projection presses closely against the inner surface of one side of the sliding slot, and spherical particles belonging to the projection and the sliding slot, and positioned between the surfaces pressing against each other, can be compressed between the projection and the sliding slot. Thus, the spherical particles can roll reliably and stably between the projection and the sliding slot. This helps to reduce the frictional force between the projection and the sliding slot. Furthermore, the position where the projection and the sliding slot press against each other can be used as a reference for the relative movement between the transmitting component and the support component. This avoids relative vibration between the transmitting component and the support component, ensures stable movement of the transmitting component, and can result in high transmission accuracy. Both the first magnetic member 4 and the second magnetic member can be magnets.

[0022] In feasible design examples, the first magnetic member is positioned on the side or bottom of the support component. The second magnetic member or magnetoconductive member is positioned on the side or bottom of the transmitting component. Thus, both the support component and the transmitting component have lateral portions that can press against each other. This prevents relative vibration between the support component and the transmitting component and helps to flexibly position the first magnetic member and the second magnetic member or magnetoconductive member.

[0023] In a feasible design example, a coil is provided on one of the support component and the transmitting component, and a third magnetic member is provided on the other of the support component and the transmitting component. The transmitting component moves relative to the support component under the driving force generated by the coordination between the coil and the third magnetic member after the coil has been energized.

[0024] In feasible design examples, the material of the spherical particles is metal, metal oxide, ceramic, or plastic. Therefore, the spherical particles can have reliable structural strength, maintain their spherical shape, and ensure that they roll normally during operation.

[0025] In feasible design examples, the support component and the transmission component are each integrally constructed. Therefore, the support component or transmission component can have high structural reliability and is also advantageous for processing and manufacturing. Furthermore, for surfaces of the support component or transmission component that are configured for mutual coordination, the integrated design can improve surface consistency, thereby ensuring more reliable coordination between the support component and the transmission component. When a lubrication structure is filled between the support component and the transmission component, it can be ensured that spherical particles can roll into contact with both components. This improves the effect of reducing frictional force.

[0026] A second aspect of the present application further provides a camera module including a lens assembly and a voice coil motor provided in the first aspect of the present application. The lens assembly is connected to the transmitting component of the voice coil motor. A first hole is provided in the support component of the voice coil motor. A coil is provided in one of the support component and the transmitting component, and a third magnetic member is provided in the other of the support component and the transmitting component. The coil and the third magnetic member are spaced apart from each other in a direction perpendicular to the centerline of the first hole. Under the drive of the transmitting component, the lens assembly moves in a direction parallel to the centerline of the first hole in order to focus into the first hole.

[0027] A camera module using a voice coil motor provided in a first aspect of this application has the same technical effects as the voice coil motor described above. Further details are not described herein.

[0028] A third aspect of the present application further provides an image acquisition device and a camera module including the voice coil motor provided in the first aspect of the present application. The image acquisition device is connected to a transmission component of the voice coil motor. A second hole is provided in a support component of the voice coil motor. The image acquisition device acquires an external image through the second hole. A coil is provided in one of the support component and the transmission component, and a third magnetic member is provided in the other of the support component and the transmission component. The coil and the third magnetic member are spaced apart from each other in a direction parallel to the center line of the second hole. Under the drive of the transmission component, the image acquisition device moves in a direction perpendicular to the center line of the second hole to compensate for the jitter amount of the camera module.

[0029] The camera module using the voice coil motor provided in the first aspect of the present application has the same technical effect as the aforementioned voice coil motor. Details are not described again in this specification.

[0030] In a realizable design example, the image acquisition device includes a lens assembly or an image sensor. Both the lens assembly and the image sensor can acquire external images. In actual applications, based on the configuration of the structure, one of the lens assembly and the image sensor is used.

[0031] A fourth aspect of the present application further provides an electronic device including the voice coil motor provided in the first aspect of the present application.

[0032] The electronic device using the voice coil motor provided in the first aspect of the present application has the same technical effect as the aforementioned voice coil motor. Details are not described again in this specification.

[0033] It should be understood that the foregoing description and the following detailed description are merely examples and are not intended to limit the present application.

Brief Description of the Drawings

[0034] [Figure 1] This is a diagram of the structure of the voice coil motor according to the present invention. [Figure 2] This is a cross-sectional view at position AA in Figure 1. [Figure 3] This is a diagram of the structure of a camera module with autofocus functionality. [Figure 4] This is a partially exploded view of a camera module with autofocus functionality. [Figure 5] This is a diagram of the partial structure of a camera module with optical image stabilization. [Figure 6] This is a cross-sectional view at position DD in Figure 5. [Figure 7] This is a cross-sectional view at position EE in Figure 5. [Figure 8] This is an enlarged view of position B in Figure 2. [Figure 9] This is a diagram of the coordination between a first sliding surface and a second sliding surface according to one embodiment of the present application. [Figure 10] This is a diagram of the coordination between the first sliding surface and the second sliding surface according to another embodiment of the present application. [Figure 11] This is a diagram of the coordination between the first sliding surface and the second sliding surface according to another embodiment of the present application. [Figure 12] This is a diagram of the coordination between the first sliding surface and the second sliding surface according to another embodiment of the present application. [Figure 13] This is a diagram of the structure of the support component. [Figure 14] This is a diagram of the structure of the transmission component. [Figure 15] This is an enlarged view of position C in Figure 2.

[0035] Reference sign: 1: Support component; 11:Protrusion; 111:Top surface; 112: Lateral aspect; 12: First sliding surface; 13: Guide shaft; 14: First magnetic component; 15: The first hole; 16: The second hole; 2: Sending component; 21: Sliding slot; 211: Bottom surface; 212: medial aspect; 22: Second sliding surface; 23: Second magnetic component; 3: Lubrication structure; 31: Spherical particles; 32: Lubricating oil; 4: Groove; 5: Lens assembly; 6: Coil; 7: Third magnetic member; and 8: Image acquisition device.

[0036] The accompanying drawings of this specification are incorporated herein and constitute part of this specification to illustrate embodiments according to the present application and are used in conjunction with this specification to illustrate the principles of the present application. [Modes for carrying out the invention]

[0037] To better understand the technical solution of the present application, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are used solely for illustrative purposes and are not intended to limit the present application.

[0038] In this description, unless otherwise specified and limited, the terms “first” and “second” are intended solely for illustrative purposes and should not be understood as indicators or suggestions of relative importance. Unless otherwise specified or indicated, the term “multiple” means two or more. Terms such as “connection” and “fastening” should be understood broadly. For example, “connection” may be a fixed connection, a removable connection, an integrated connection, or an electrical connection, or a direct connection, or an indirect connection using an intermediate medium. A person skilled in the art will be able to understand the specific meaning of the aforementioned terms in this description in specific cases.

[0039] Motors are essential components of camera modules in electronic devices such as mobile phones or computers. Existing motors typically include spring motors and sliding contact motors. In the case of a spring motor, one spring is positioned on each of the two sides in the direction of movement of the movable member, with at least a portion of the springs on both sides fixedly connected to the movable member, and at least a portion of the springs on both sides also fixedly connected to a stationary member. As the movable member moves, the spring on one side of the movable member may generate compression deformation, and the spring on the other side may generate extension deformation. Regardless of whether the spring is extension or compression deformed, resistance is created to the movement of the movable member, and the movable member must overcome this resistance from the spring during movement. This can significantly increase the steady-state power consumption of the motor. Also, because the spring has a certain stiffness, the motor cannot implement movements with large strokes.

[0040] In a sliding contact motor, the movable and fixed members slide in coordination. When the movable member slides against the fixed member, sliding friction is formed between the movable and fixed members, resulting in a high coefficient of friction at the contact interface between the movable and fixed members. As a result, the motor must overcome the extra sliding friction force during operation, leading to increased power consumption and high noise generation at the friction interface.

[0041] Figure 1 is a diagram of the structure of a voice coil motor according to one embodiment of the present application. Referring to Figure 1, this embodiment of the present application provides a voice coil motor (VCM). The voice coil motor may be an autofocus (AF) micromotor or an optical image stabilization (OIS) micromotor. Indeed, the voice coil motor may be, alternatively, a motor that uses the structure of a voice coil motor and implements a different function. The voice coil motor may be used in a camera module. The camera module may be a camera module using a voice coil motor with autofocus functionality, or a camera module using a voice coil motor with optical image stabilization functionality. Furthermore, a camera module using the voice coil motor provided in the present application may be used in any electronic device having camera functionality. The electronic device may be an electronic device having a camera function, such as a mobile phone, tablet computer, desktop computer, laptop computer, handheld computer, notebook computer, ultra-mobile personal computer (UMPC), netbook, wearable device, in-vehicle device, smart home device, and / or smart city device. The specific type of electronic device is not specifically limited to the embodiments of this application.

[0042] Figure 2 is a cross-sectional view at position AA in Figure 1. Referring to Figure 2, the voice coil motor includes a support component 1, a transmitting component 2, and a lubrication structure 3. The support component 1 may be the main structure of the voice coil motor and is configured to point to various functional or non-functional structural components. The transmitting component 2 may move relative to the support component 1 and may drive assemblies such as lenses or image sensors to move synchronously to implement functions such as focusing or image stabilization.

[0043] Specifically, one of the support component 1 and the transmitting component 2 is provided with a coil, and the other of the support component 1 and the transmitting component 2 is provided with a third magnetic member. Optionally, the support component 1 is provided with a coil and the transmitting component 2 is provided with a third magnetic member. After being energized, the coil can generate a driving force in cooperation with the third magnetic member. The driving force is a Lorentz force, which can drive the transmitting component 2 to move relative to the support component 1. The direction of the current in the coil can change, thereby changing the direction of the driving force. In this way, the transmitting component 2 moves back and forth to drive a lens assembly to move parallel to the optical axis to implement focusing, or to drive an image acquisition device to move perpendicular to the optical axis to implement image stabilization. The third magnetic member may be a magnet.

[0044] For example, Figure 3 is a diagram of the structure of a camera module with autofocus functionality. Referring to Figure 3, when a voice coil motor is used in a camera module with autofocus functionality, the camera module further includes a lens assembly 5. The lens assembly 5 is connected to the transmitting component 2 of the voice coil motor. Figure 4 is an exploded view of a camera module with autofocus functionality. Referring to Figure 4, the support component 1 of the voice coil motor is provided with a first hole 15, a coil 6 is provided in one of the support component 1 and the transmitting component 2, and a third magnetic member 7 is provided in the other of the support component 1 and the transmitting component 2. In Figure 4, the coil 6 is located in the support component 1, and the third magnetic member 7 is located in the transmitting component 2. The coil 6 and the third magnetic member 7 are spaced apart from each other in a direction perpendicular to the center line of the first hole 15. The direction of the center line is direction X1 shown in Figure 4, and the direction perpendicular to the center line is direction Y1 shown in Figure 4. Under the drive of the transmitting component 2, the lens assembly 5 moves in a direction X1 parallel to the center line of the first hole 15 in order to focus onto the first hole 15.

[0045] For example, Figure 5 is a diagram of a partial structure of a camera module with optical image stabilization, with the lens assembly removed. Referring to Figure 5, when a voice coil motor is used in a camera module with optical image stabilization, the camera module further includes an image acquisition device 8. The image acquisition device 8 is connected to the transmitting component 2 of the voice coil motor. Referring to Figure 5, the support component 1 of the voice coil motor is provided with a second hole 16, and the image acquisition device 8 acquires an external image through the second hole 16. Figure 6 is a cross-sectional view at position DD in Figure 5. Referring to Figure 6, a coil 6 is provided in one of the support component 1 and the transmitting component 2, and a third magnetic member 7 is provided in the other of the support component 1 and the transmitting component 2. In Figure 6, the coil 6 is located in the transmitting component 2, and the third magnetic member 7 is located in the support component 1. The coil 6 and the third magnetic member 7 are spaced apart from each other in a direction parallel to the centerline of the second hole 16. The direction of the center line is direction Y2 as shown in Figure 6, and the direction perpendicular to the center line is direction X2 as shown in Figure 6. Under the drive of the transmitting component 2, the image acquisition device 8 moves in a direction perpendicular to the center line of the second hole 16 in order to compensate for the amount of jitter of the camera module and to implement an optical image stabilization function.

[0046] The image acquisition device 8 may include a lens assembly or an image sensor. Both the lens assembly and the image sensor can acquire external images. In Figures 5 to 7, an image sensor is used as an example. In actual application, one of the lens assembly and the image sensor will be used depending on the configuration of the structure.

[0047] In this embodiment, the transmitting component 2 is in sliding contact with the support component 1. To reduce the sliding resistance between the transmitting component 2 and the support component 1, a lubrication structure 3 may be placed between the support component 1 and the transmitting component 2. Figure 8 is an enlarged view at position B in Figure 2. Referring to Figure 8, the lubrication structure 3 includes a lubricating oil 32 and a plurality of spherical particles 31 dispersed in the lubricating oil 32. At least some of the plurality of spherical particles 31 have one side in contact with the support component 1 and the other side in contact with the transmitting component 2. As the support component 1 and the transmitting component 2 move relative to each other, at least some of the plurality of spherical particles 31 roll against the support component 1 and the transmitting component 2. Figure 8 is a diagram in which the lubrication structure 3 is placed in a voice coil motor having an autofocus function. Figure 7 is a cross-sectional view at position EE in Figure 5. Figure 7 is a diagram in which the lubrication structure 3 is placed in a voice coil motor having an optical image stabilization function. Referring to Figure 7, the lubrication structure 3 may be positioned between the bottom of the transmitting component 2 and the bottom of the support component 1, so that at least some of the multiple spherical particles 31 in the lubrication structure 3 can roll into contact with both the bottom of the transmitting component 2 and the bottom of the support component 1.

[0048] The lubricating oil 32 can be various types of grease having a specific lubricating viscosity, and may be liquid oil or ointment oil. Multiple spherical particles 31 can be dispersed in the lubricating oil 32. The surface of the spherical particles 31 is spherical. When the transmitting component 2 moves relative to the support component 1, the spherical particles 31 are compressed and rolled by the transmitting component 2 and the support component 1, forming rolling friction between the transmitting component 2, the support component 1, and the spherical particles 31. The frictional force between the transmitting component, the support component, and the spherical particles is much smaller than the sliding frictional force between the transmitting component 2 and the support component 1. Multiple spherical particles 31 are dispersed, thereby forming rolling friction at multiple locations of the interface between the transmitting component 2 and the support component 1 that moves relative to each other, effectively reducing frictional resistance, lowering the steady-state power consumption of the motor, and potentially achieving a mute effect. Furthermore, the spherical particles 31 are placed in the lubricating oil 32, and the lubricating oil 32 can form an oil film on the surface of the spherical particles 31, which can further reduce friction between the spherical particles 31 and the transmitting component 2 and the support component 1. In this way, even if the spherical particles 31 roll, because the spherical particles 31 are located inside the lubricating oil 32, the surface of the spherical particles 31 can always be covered with an oil film, ensuring that a continuous lubrication effect can be achieved between the spherical particles 31 and the transmitting component 2 and the support component 1. In addition, the lubricating oil 32 has a specific viscosity, which ensures that the spherical particles 31 adhere to the lubricating oil 32 without separating. This improves the overall operational life of the lubrication structure 3.

[0049] To implement normal relative movement between the transmitting component 2 and the support component 1, there may be a gap between the matching interfaces between the transmitting component 2 and the support component 1. The gap is small, and the thickness of the oil film that can be formed in the gap by the lubricating oil 32 is small. The size of the spherical particles 31 is not limited to very large ones. Otherwise, the spherical particles cannot be enveloped by the lubricating oil 32, and when the spherical particles 31 are quite large, they cannot adhere to the lubricating oil 32 and may fall out during the process of the transmitting component 2 and the support component 1 moving relative to each other. Also, if the diameter size of the spherical particles 31 exceeds the millimeter or centimeter level, the structure used to fasten the spherical particles 31 must be manufactured separately on the transmitting component 2 or the support component 1. As a result, the motor has a large size and complex structure, and it becomes difficult for the lubricating oil 32 to form an oil film in the parts of the spherical particles 31 that are in contact with the transmitting component 2 and the support component 1. The lubricating oil 32 and the spherical particles 31 cannot cooperate with each other to reduce friction. Furthermore, if the size of the spherical particles 31 is excessively small, the spherical particles 31 cannot come into contact with both the transmitting component 2 and the support component 1, and effective rolling friction may be formed between the transmitting component 2 and the support component 1. If the compressive force between the transmitting component 2 and the support component 1 is excessively large, the thickness of the oil film formed by the lubricating oil 32 will be reduced due to the compressive force, and the lubricating effect will not be achieved. The transmitting component 2 and the support component 1 are more likely to come into direct contact with each other, forming sliding friction and resulting in a large frictional force.

[0050] Therefore, in this embodiment, the diameter of the spherical particles 31 can range from 10 μm to 500 μm. The diameter size of the spherical particles 31 is at the micron level and can match the gap between the transmitting component 2 and the support component 1. The spherical particles may be in contact with both the transmitting component 2 and the support component 1 and may be covered with lubricating oil 32. This ensures a continuous lubrication effect in the relative movement of the spherical particles 31 and between the transmitting component 2 and the support component 1, effectively reducing frictional resistance, further contributing to a reduction in the overall size of the motor, and enabling the implementation of a miniaturized design for the camera module. Furthermore, the spherical particles 31 within the size range also possess a certain structural strength and can still maintain their shape without damage when compressed by the transmitting component 2 and the support component 1. This ensures the stability of the movement of the transmitting component 2 relative to the support component 1. Furthermore, because the spherical particles 31 are small in size, multiple spherical particles 31 can be centrally positioned within a small area in contact with the support component 1 and the transmitting component 2, and the multiple spherical particles 31 are laid between the support component 1 and the transmitting component 2 by the lubricating oil 32. This not only avoids occupying a large space but also improves the stability of supporting the support component 1 and the transmitting component 2. Specifically, the diameter of the spherical particles 31 may be 10 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, or 500 μm.

[0051] In a particular implementation, the material of the spherical particles 31 may be a metal, a metal oxide, a ceramic, or a plastic. The metal may be steel or copper, and the metal oxide may be zirconia. Thus, the spherical particles 31 can have reliable structural strength, maintain their spherical shape, and ensure that they roll normally during operation. Certainly, in other embodiments, the material of the spherical particles 31 may be alternatively another material that can ensure structural strength. This embodiment is not limited to this.

[0052] In a particular implementation, Figure 9 is a diagram of the coordination between a first sliding surface 12 and a second sliding surface 22 according to one embodiment of the present invention. Referring to Figure 9, the support component 1 is provided with a first sliding surface 12. The first sliding surface 12 is a surface of the support component 1 and is configured to slide against the transmitting component 2. The transmitting component 2 is provided with a second sliding surface 22. The second sliding surface 22 is a surface of the transmitting component 2 and is configured to slide against the support component 1. A lubrication structure 3 is positioned between the first sliding surface 12 and the second sliding surface 22.

[0053] The first sliding surface 12 and the second sliding surface 22 may, separately, be one of a plane, a curved surface, a V-shaped surface, or a U-shaped surface. In other words, the first sliding surface 12 and the second sliding surface 22 may be any two of the following coordinating planes, curved surfaces, V-shaped surfaces, or U-shaped surfaces. A V-shaped surface may be formed by two planes at a specific angle. A U-shaped surface may be formed by a curved surface and planes positioned opposite two sides of the curved surface.

[0054] For example, referring to Figure 9, the first sliding surface 12 may be a V-shaped surface, the second sliding surface 22 may be a curved surface, and the lubrication structure 3 is positioned between the V-shaped surface and the curved surface. It can be understood that one side of the V-shaped surface is convex and the other side is concave, and one side of the curved surface is convex and the other side is concave. In this embodiment, when the V-shaped surface and the curved surface cooperate with each other, the direction in which the curved surface is convex is consistent with the direction in which the V-shaped surface is convex, and the curved surface is located on the concave side of the V-shaped surface.

[0055] As another example, both the first sliding surface 12 and the second sliding surface 22 may be planar, and the lubrication structure 3 is positioned between the two planar surfaces. As yet another example, Figure 10 is a diagram of the coordination between the first sliding surface 12 and the second sliding surface 22 according to another embodiment of the present application. Referring to Figure 10, both the first sliding surface 12 and the second sliding surface 22 may be V-shaped surfaces, and the lubrication structure 3 is positioned between the two V-shaped surfaces. It can be understood that one side of the V-shaped surface is convex and the other side of the V-shaped surface is concave. In this embodiment, when the two V-shaped surfaces coordinate with each other, the direction in which the two V-shaped surfaces are convex is consistent.

[0056] As another example, Figure 11 is a diagram of coordination between a first sliding surface 12 and a second sliding surface 22 according to another embodiment of the present application. Referring to Figure 11, both the first sliding surface 12 and the second sliding surface 22 may be curved surfaces, and the lubrication structure 3 is positioned between the two curved surfaces. When the two curved surfaces coordinate with each other, the direction in which the two curved surfaces are convex is consistent.

[0057] As another example, Figure 12 is a diagram of the coordination between a first sliding surface 12 and a second sliding surface 22 according to another embodiment of the present application. Referring to Figure 12, the first sliding surface 12 may be a flat surface, the second sliding surface 22 may be a curved surface, and the lubrication structure 3 is positioned between the flat and curved surfaces. When the flat surface coordinates with the curved surface, one convex side of the curved surface becomes closer to the flat surface.

[0058] Indeed, in some other embodiments, the first sliding surface 12 and the second sliding surface 22 may be surfaces of other shapes. The shapes are not limited to one another as described herein.

[0059] The lubricating oil 32 may be a liquid. The lubricating oil has a certain viscosity, but it still has a certain fluidity. If the lubricating oil 32 is placed between two surfaces that are not restricted in the circumferential direction, for example, between two planes, a flat and a curved surface, or two surfaces that are not restricted in the circumferential direction, the lubricating oil 32 is likely to diffuse irregularly and be consumed quickly. As a result, the long-term effect of reducing frictional force cannot be achieved.

[0060] Therefore, in this embodiment, referring to Figure 8, at least one of the support component 1 and the transmitting component 2 is provided with at least one groove 4. Specifically, the groove 4 is of the support component 1 and the transmitting component 2, and is provided on surfaces that slide in coordination with each other, and the lubrication structure 3 is located within the groove 4. The lubrication structure 3 can be contained within the groove 4 without random diffusion or flow. Through the opening of the groove 4, the lubrication structure 3 within the groove 4 can come into contact with components that slide with each other. For example, the support component 1 is provided with a groove 4, the transmitting component 2 does not have a groove 4, and the lubrication structure 3 within the groove 4 is in contact with the transmitting component 2. In another example, the transmitting component 2 is provided with a groove 4, the support component 1 does not have a groove 4, and the lubrication structure 3 within the groove 4 is in contact with the support component 1. In yet another example, the support component 1 and the transmitting component 2 are each provided with a groove 4, and the lubrication structure 3 within the groove 4 of the support component 1 may come into contact with the transmitting component 2, and the lubrication structure 3 within the groove 4 of the transmitting component 2 may come into contact with the support component 1.

[0061] The depth of the groove 4 may be less than the diameter of the spherical particles 31. Therefore, at least a portion of the spherical particles 31 may protrude from the groove 4 and come into contact with components moving relative to each other outside the groove 4. This reduces friction and provides lubrication.

[0062] In a particular embodiment, multiple grooves 4 are spaced apart from each other in the direction in which the transmitting component 2 and the support component 1 slide against each other. Therefore, rolling friction can be formed by the spherical particles 31 over a large area where the transmitting component 2 cooperates with the support component 1, and lubrication can be implemented by using lubricating oil 32. This improves the effect of reducing frictional force.

[0063] In another specific embodiment, Figure 13 is a diagram of the structure of the support component 1. Referring to Figure 13, one groove 4 may be provided, which extends continuously in the direction in which the transmitting component 2 and the support component 1 slide relative to each other. Thus, consistency in reducing frictional force and improving lubrication effect between the transmitting component 2 and the support component 1 can be improved, and stable movement between the transmitting component 2 and the support component 1 can be ensured.

[0064] In a particular implementation, one of the support component 1 and the transmitting component 2 is provided with a projection 11, and the other of the support component and the transmitting component is provided with a sliding slot 21. The transmitting component 2 is slidably connected to the support component 1 by a fit between the sliding slot 21 and the projection 11. The lubrication structure 3 is positioned between the sliding slot 21 and the projection 11.

[0065] Referencing Figure 13, the support component 1 is provided with a projection 11. Figure 14 is a diagram of the structure of the transmitting component 2. Referring to Figure 14, the transmitting component 2 is provided with a sliding slot 21. Alternatively, the transmitting component 2 is provided with the projection 11 and the support component 1 is provided with the sliding slot 21. Regardless of which of the above arrangements is used, the fit between the projection 11 and the sliding slot 21 can provide guidance for the relative movement between the transmitting component 2 and the support component 1, ensuring the stability of the movement of the transmitting component 2 relative to the support component 1. Furthermore, a lubrication structure 3 is filled between the projection 11 and the sliding slot 21, thereby allowing the transmitting component 2 and the support component 1 to separately roll into contact with the spherical particles 31 and form rolling friction. Additionally, by using lubricating oil 32 and an oil film on the spherical particles 31, frictional force can be effectively reduced, steady-state power consumption of the motor can be reduced, and a mute effect can also be achieved.

[0066] In a particular implementation, the sliding slot 21 is one of an arc-shaped slot, a V-shaped slot, a U-shaped slot, or a trapezoidal slot. The U-shaped slot includes a type having an arc-shaped angle or edge angle at its corners. The sliding slot 21 is a concave structure and has a specific length, and it can be understood that the projection 11 can slide within the sliding slot 21 in the longitudinal direction of the sliding slot. In a direction perpendicular to the length of the sliding slot 21, the shape formed by the inner surface of the sliding slot 21 in a cross-sectional view of the sliding slot 21 is arc-shaped, V-shaped, U-shaped, or trapezoidal. The inner surface of the sliding slot 21 is the second sliding surface 22 of the transmitting component 2. Indeed, in some other embodiments, the shape may be alternatively different. Regardless of which shape is used, the projection 11 can be guided, and the design of the sliding slot 21 is more flexible. The lubrication structure 3 is a solid-liquid two-phase structure comprising liquid lubricant 32 and solid spherical particles 31. Regardless of the shape used for the sliding slot 21, the lubrication structure can be positioned between the sliding slot 21 and the protrusion 11 without occupying additional space.

[0067] In a particular implementation, the cross-sectional shape of the projection 11 is one of the following: semicircular, elliptical, U-shaped, triangular, or trapezoidal. The projection 11 also has a specific length. The longitudinal direction of the projection is the direction in which the projection 11 slides relative to the sliding slot 21. The cross-section of the projection 11 is perpendicular to the longitudinal direction of the projection 11. The outer surface of the projection 11 that cooperates with the sliding slot 21 is the first sliding surface 12 of the support component 1. The cross-sectional shape of the projection 11 is not limited to the shapes listed above, and may alternatively be another regular or irregular shape. The shape of the projection 11 can be flexibly designed based on the actual design context of the motor. Regardless of the shape used for the projection 11, the solid-liquid two-phase lubrication structure 3 is positioned between the projection 11 and the sliding slot 21 to reduce friction between the transmitting component 2 and the support component 1, thereby reducing the steady-state power consumption of the motor.

[0068] Specifically, the shape of the sliding slot 21 may be the same as or different from the shape of the projection 11. Optionally, Figure 15 is an enlarged view at position C in Figure 2. Referring to Figure 15, the sliding slot 21 is a U-shaped slot with right angles at its corners, and the cross-sectional shape of the projection 11 is also U-shaped with right angles at its corners. The projection 11, with its U-shaped cross-section, has one upper surface 111 and two outer sides 112. The two outer sides 112 are the two outer surfaces in the width direction of the projection 11, each located on two sides of the upper surface 111. The sliding slot 21 has a concave structure and has a bottom surface 211 and two inner sides 212. The bottom surface 211 of the sliding slot 21 faces the upper surface 111 of the projection 11, and the two inner sides 212 of the sliding slot 21 each face the two outer sides 112 of the projection 11. The lubrication structure 3 may be positioned only between the bottom surface 211 of the sliding slot 21 and the top surface 111 of the projection 11, or only between the inner side surface 212 of the sliding slot 21 and the outer side surface 112 of the projection 11, or not only between the bottom surface 211 of the sliding slot 21 and the top surface 111 of the projection 11, but also between the inner side surface 212 of the sliding slot 21 and the outer side surface 112 of the projection 11. The spherical particles 31 can reduce friction by rolling into contact with both the sliding slot 21 and the projection 11.

[0069] To restrict the lubrication structure 3 and prevent the lubricating oil 32 and spherical particles 31 from diffusing irregularly, a groove 4 is provided on at least one of the upper surface 111 and outer side surface 112 of the projection 11 configured to cooperate with the sliding slot 21, and / or a groove 4 is provided on at least one of the bottom surface 211 and inner side surface 212 of the sliding slot 21 configured to cooperate with the projection 11. The lubrication structure 3 is located within the groove 4. In addition, the depth of the groove 4 is less than the diameter of the spherical particles 31 to ensure that at least a portion of the spherical particles 31 extends outside the groove 4 and comes into contact with external components.

[0070] Referencing Figure 10 (optionally), the sliding slot 21 is a V-shaped slot, and the cross-sectional shape of the projection 11 is triangular. The sliding slot 21 has two inclined inner surfaces at a specific induction angle. The inner surfaces are the second sliding surfaces 22 of the transmitting component 2. The second sliding surfaces 22 are V-shaped surfaces. The projection 11 also has two inclined outer surfaces at a specific narrow angle. The outer surfaces are the first sliding surfaces 12 of the supporting component 1. The first sliding surfaces 12 are also V-shaped surfaces. The two outer surfaces of the projection 11 can coordinate with the two corresponding inner surfaces of the sliding slot 21. The lubrication structure 3 can be positioned between the corresponding outer surfaces of the projection 11 and the inner surfaces of the sliding slot 21. A groove 4 may also be provided on at least one of the inner surfaces of the sliding slot 21 and the outer surfaces of the projection 11, and the lubrication structure 3 is positioned within the groove 4. This can prevent the lubrication structure 3 from spreading irregularly.

[0071] Optionally, referring to Figure 11, the sliding slot 21 is an arc-shaped slot, and the cross-sectional shape of the projection 11 is also arc-shaped. That is, the second sliding surface 22 of the transmitting component 2 is an arc-shaped surface, and the first sliding surface 12 of the supporting component 1 is an arc-shaped surface. The arc-shaped inner surface of the sliding slot 21 coordinates with the arc-shaped outer surface of the projection 11. The lubrication structure 3 can be positioned between the arc-shaped inner and outer surfaces.

[0072] Referencing Figure 12 (optionally), the sliding slot 21 is a rectangular slot, and the cross-sectional shape of the projection 11 is arc-shaped. That is, the outer surface of the projection 11 is the first sliding surface 12 and is arc-shaped, and the bottom surface of the sliding slot 21 is the second sliding surface 22 and is flat. The gap between the outer surface of the projection 11 and the sliding slot 21 is non-uniform. The distance between the apex of the projection 11 and the bottom surface of the sliding slot 21 is relatively small. The lubrication structure 3 can be positioned between the region of the projection 11 near the apex and the bottom surface of the sliding slot 21. In this way, the spherical particles 31 can roll in contact with both the projection 11 and the sliding slot 21 to implement the function of reducing friction. Indeed, the lubrication structure 3 is located between the projection 11 and the sliding slot 21, and can also be filled in other gap positions far from the apex of the projection 11, thereby reducing the sliding friction between the projection 11 and the sliding slot 21 by utilizing the lubricating function of the lubricating oil 32. The lubrication structure 3 may also be limited by providing grooves 4 on the arc-shaped outer surface of the projection 11 or the inner surface of the sliding slot 21.

[0073] In some other embodiments, the surface of the transmitting component 2 that coordinates with the protrusion 11 within the supporting component 1 is planar. Referring to Figure 12, feature designs such as recesses or protrusions may not be located on a planar surface, and the lubrication structure 3 may instead be located between the planar surface and the protrusion 11.

[0074] In a particular implementation, the support component 1 and the transmission component 2 may each be a single integrated structure. The protrusions 11 or grooves 4 can be machined and formed synchronously during the molding process of the support component 1 or transmission component 2, without separately machining the protrusions 11 or grooves 4 using a separate process. Therefore, the support component 1 or transmission component 2 can have high structural reliability and is also convenient for processing and manufacturing. For example, depending on the material used, integrated injection molding or stamping molding may be used for the support component 1 or transmission component 2.

[0075] In the case of surfaces of support component 1 or transmission component 2 that are configured for mutual coordination, the integration method can improve surface consistency, thereby allowing support component 1 to coordinate more reliably with transmission component 2. When the lubrication structure 3 is filled between support component 1 and transmission component 2, it can be ensured that the spherical particles 31 can roll into contact with support component 1 and transmission component 2. This improves the effect of reducing frictional force.

[0076] In a specific implementation, referring to Figure 9, the support component 1 is provided with a guide shaft 13. The transmitting component 2 is provided with a guide hole or guide slot. The guide hole or guide slot is slidably fitted over the guide shaft 13. The lubrication structure 3 is positioned between the guide hole or guide slot and the guide shaft 13.

[0077] For example, if the transmitting component 2 is provided with a guide hole, the guide shaft 13 may enter the guide hole, and the transmitting component 2 may slide on the guide shaft 13 through the guide hole. The lubrication structure 3 may be filled between the inner wall of the guide hole and the guide shaft 13. For example, if the transmitting component 2 is provided with a guide slot, the guide slot may cover at least a portion of the outer circumference of the guide shaft 13 in the circumferential direction, thereby allowing the transmitting component 2 to slide on the guide shaft 13 through the guide slot. The lubrication structure 3 may be positioned between the guide slot and the guide shaft 13. The guide slot may be a sliding slot 21 and may have several different shapes. Referring to Figure 9, the guide slot is a V-shaped slot. Designs in which the guide slot is a slot of a different shape are again not described herein.

[0078] A groove 4 may be provided on at least one of the outer surface of the guide shaft 13 and the inner surface of the guide hole or guide slot. The lubrication structure 3 is located within the groove 4. Therefore, the lubrication structure 3 can be prevented from flowing irregularly. The depth of the groove 4 is less than the diameter of the spherical particles 31. This ensures that at least a portion of the spherical particles 31 can extend outside the groove 4 and come into contact with external components.

[0079] In a particular implementation, referring to Figures 13 and 14, a first magnetic member 14 is provided on one of the support component 1 and the transmitting component 2, and a second magnetic member 23 or a magnetoconductive member is provided on the other of the support component and the transmitting component. The support component 1 and the transmitting component 2 are compressed on both sides of at least a portion of the spherical particle 31 by adsorption coordination between the first magnetic member 14 and the second magnetic member 23 or by adsorption coordination between the first magnetic member 14 and the magnetoconductive member.

[0080] If a first magnetic member 14 is provided on one of the support component 1 and the transmitting component 2, and a second magnetic member 23 is provided on the other of the support component and the transmitting component, then the magnetic poles of the first magnetic member 14 and the second magnetic member 23 that are close to each other face each other, thereby generating a mutual attractive force between the first magnetic member 14 and the second magnetic member 23. If a first magnetic member 14 is provided on one of the support component 1 and the transmitting component 2, and a magnetoconductive member is provided on the other of the support component and the transmitting component, the magnetoconductive member may be pure iron, silicon steel, or permalloy, and the mutual attractive force may instead be generated between the first magnetic member 14 and the magnetoconductive member.

[0081] Specifically, the following example uses a configuration in which a projection 11 is provided on the support component 1 and a sliding slot 21 is provided on the transmission component 2.

[0082] The projection 11 may extend into the sliding slot 21 and move within the sliding slot 21. If the sliding slot 21 is a square slot and the cross-sectional shape of the projection 11 is square, the outer surface of the projection 11 faces the inner surface of the sliding slot 21, and the top surface of the projection 11 faces the bottom surface of the sliding slot 21. A gap exists between the projection 11 and the sliding slot 21 to facilitate the assembly of the projection 11 and the sliding slot 21 and to facilitate relative movement between the projection 11 and the sliding slot 21. A vibration is generated between the projection 11 and the sliding slot 21 at the location where the gap exists, but this does not contribute to the stable relative movement between the transmitting component 2 and the supporting component 1. Also, if the gap is larger than the diameter of the spherical particle 31, this does not contribute to reliable contact between the spherical particle 31 and the projection 11 or sliding slot 21 and does not contribute to the implementation of rolling friction. Furthermore, even if the gap between the spherical particles 31 and the protrusions 11 or sliding slots 21 is filled with lubricating oil 32, the protrusions 11 and sliding slots 21 also have a vibration amount in the gap because the lubricating oil 32 is fluid.

[0083] Therefore, in this embodiment, the first magnetic member 14 and the second magnetic member 23 or magnetoconductive member that attract each other are positioned on the transmitting component 2 and the support component 1. Due to the attractive force, the outer surface of one side of the projection 11 is pressed closely against the inner surface of one side of the sliding slot 21, and the spherical particle 31, which belongs to the projection 11 and the sliding slot 21 and is positioned between the surfaces pressing against each other, can be compressed between the projection 11 and the sliding slot 21. Thus, the spherical particle 31 can roll reliably and stably between the projection 11 and the sliding slot 21. This helps to reduce the frictional force between the projection 11 and the sliding slot 21. In addition, the position where the projection 11 and the sliding slot 21 press against each other can be used as a reference for the relative movement between the transmitting component 2 and the support component 1. This avoids relative shaking between the transmitting component 2 and the support component 1, ensures stable movement of the transmitting component 2, and can have high transmission accuracy. Both the first magnetic member 14 and the second magnetic member 23 may be magnets.

[0084] Optionally, referring to Figure 13, the first magnetic member 14 may be positioned in the lateral direction of the support component 1, the lateral direction of the support component 1 being the side of the support component 1 and perpendicular to the direction in which the transmitting component 2 and the support component 1 slide relative to each other. Referring to Figure 14, the second magnetic member 23 or magnetoconductive member is of the transmitting component 2 and is positioned on the side closer to the first magnetic member 14. The attractive force between the first magnetic member 14 and the second magnetic member 23 or magnetoconductive member may cause the outer surface on the side of the protrusion 11 to press against the inner surface on the side of the sliding slot 21, thereby avoiding relative vibration between the transmitting component 2 and the support component 1 at the pressing position.

[0085] Optionally, the first magnetic member 14 may be positioned at the bottom of the support component 1, and the second magnetic member 23 or magnetoconductive member may be positioned at the bottom of the transmitting component 2. In this way, an attractive force is generated between the bottom of the support component 1 and the bottom of the transmitting component 2, and the upper part of the projection 11 presses against the bottom of the sliding slot 21. Relative vibration between the transmitting component 2 and the support component 1 at the pressing position can be avoided.

[0086] When the first magnetic member 14 is located at the bottom of the support component 1, the position of the first magnetic member 14 may be aligned with the position of the protrusion 11, and the position of the second magnetic member 23 or magnetoconductive member on the transmitting component 2 may also be aligned with the position of the sliding slot 21. This helps the upper surface of the protrusion 11 and the bottom surface of the sliding slot 21 to press more securely against each other, ensuring stability of movement between the transmitting component 2 and the support component 1. In this embodiment, one or more first magnetic members 14 may be located, and the number of first magnetic members 14 may be the same as the number of protrusions 11. Accordingly, the number of second magnetic members 23 or magnetoconductive members may also be the same as the number of sliding slots 21. This helps the protrusion 11 to fit securely into the sliding slot 21, improving the stability of movement between the transmitting component 2 and the support component 1.

[0087] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit it. To those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, or improvements made without departing from the spirit and principles of the present application shall be within the scope of protection.

Claims

1. A voice coil motor, wherein the voice coil motor is used in a camera module, and the voice coil motor is: Support component; A transmitting component, where the transmitting component moves relative to the supporting component; and A lubrication structure, wherein the lubrication structure is positioned between the support component and the transmitting component, and the lubrication structure comprises a lubricating oil and a plurality of spherical particles dispersed in the lubricating oil, wherein at least a portion of the plurality of spherical particles has one side in contact with the support component and the other side in contact with the transmitting component, and as the support component and the transmitting component move relative to each other, at least a portion of the plurality of spherical particles roll relative to the support component and the transmitting component. A voice coil motor equipped with a voice coil motor.

2. The voice coil motor according to claim 1, wherein the diameter of the spherical particles is 10 μm to 500 μm.

3. A projection is provided on one of the support component and the transmitting component, a sliding slot is provided on the other of the support component and the transmitting component, and the transmitting component is slidably connected to the support component by a fit between the sliding slot and the projection; The lubrication structure is positioned between the sliding slot and the protrusion. The voice coil motor according to claim 1 or 2.

4. The voice coil motor according to claim 3, wherein the sliding slot is one of an arc-shaped slot, a V-shaped slot, a U-shaped slot, or a trapezoidal slot.

5. The voice coil motor according to claim 4, wherein the cross-sectional shape of the protrusion is one of a semicircular arc, an elliptical arc, a U-shape, a triangle, or a trapezoid.

6. A groove is provided on at least one of the outer surface of the protrusion and the inner surface of the sliding slot, and the lubrication structure is arranged in the groove; The voice coil motor according to any one of claims 3 to 5, wherein the depth of the groove is smaller than the diameter of the spherical particle.

7. The support component is provided with a guide shaft, and the transmitting component is provided with a guide hole or guide slot, the guide hole or guide slot being slidably fitted over the guide shaft; The voice coil motor according to claim 1 or 2, wherein the lubrication structure is disposed between the guide hole or the guide slot and the guide shaft.

8. A groove is provided on at least one of the outer surface of the guide shaft and the inner surface of the guide hole or the guide slot, and the lubrication structure is arranged in the groove; The voice coil motor according to claim 7, wherein the depth of the groove is smaller than the diameter of the spherical particle.

9. The voice coil motor according to claim 6 or 8, wherein a plurality of grooves are spaced apart from each other in the direction in which the transmitting component and the support component slide against each other.

10. The voice coil motor according to claim 6 or 8, wherein a groove is provided, the groove extending continuously in the direction in which the transmitting component and the supporting component slide relative to each other.

11. A first magnetic member is provided on one of the support component and the transmitting component, and a second magnetic member or magnetoconductive member is provided on the other of the support component and the transmitting component; The support component and the transmitting component are compressed on both sides of at least a portion of the plurality of spherical particles by adsorption coordination between the first magnetic member and the second magnetic member or by adsorption coordination between the first magnetic member and the magnetoconductive member. A voice coil motor according to any one of claims 1 to 10.

12. The first magnetic member is positioned in the lateral direction or at the bottom of the support component; The second magnetic member or the magnetoconductive member is positioned on the side of the transmitting component or at its bottom. The voice coil motor according to claim 11.

13. A coil is provided on one of the support component and the transmitting component, and a third magnetic member is provided on the other of the support component and the transmitting component, and after the coil is energized, the transmitting component moves relative to the support component under the driving force generated by the coordination between the coil and the third magnetic member. A voice coil motor according to any one of claims 1 to 12.

14. The voice coil motor according to any one of claims 1 to 13, wherein the material of the spherical particles is a metal, a metal oxide, a ceramic, or a plastic.

15. The voice coil motor according to any one of claims 1 to 14, wherein the support component and the transmitting component are each integrally structured.

16. A camera module comprising a lens assembly and a voice coil motor according to any one of claims 1 to 15, wherein the lens assembly is connected to the transmitting component of the voice coil motor; The support component of the voice coil motor is provided with a first hole, the coil is provided on one of the support component and the transmitting component, the third magnetic member is provided on the other of the support component and the transmitting component, and the coil and the third magnetic member are spaced apart from each other in a direction perpendicular to the center line of the first hole; Under the drive of the transmitting component, the lens assembly moves in a direction parallel to the center line of the first hole in order to focus onto the first hole. Camera module.

17. Image acquisition device and camera module comprising a voice coil motor according to any one of claims 1 to 15, wherein the image acquisition device is connected to the transmitting component of the voice coil motor; The support component of the voice coil motor is provided with a second hole, and the image acquisition device acquires an external image through the second hole; The coil is provided on one of the support component and the transmitting component, and the third magnetic member is provided on the other of the support component and the transmitting component, and the coil and the third magnetic member are spaced apart from each other in a direction parallel to the center line of the second hole; Under the operation of the transmitting component, the image acquisition device moves in a direction perpendicular to the center line of the second hole to compensate for the amount of jitter of the camera module. Camera module.

18. The camera module according to claim 17, wherein the image acquisition device has a lens assembly or an image sensor.

19. An electronic device comprising a camera module according to any one of claims 16 to 18.

Images