A prism assembly, a prism motor and an electronic device

Abstract

The prism assembly, the prism motor and the electronic device, the prism assembly of the application can be applied to electronic devices such as mobile phones, digital cameras, wearable devices, vehicle-mounted devices or other portable products, by configuring the prism assembly to be in a torque range of a theoretical design relative to a rotation center of gravity, the static posture difference of the prism motor can be ensured, the risk of resonance and shaking impact noise is reduced, the prism assembly precision is improved, and by reasonable configuration, the moment generated by the gravity center of the prism assembly can be almost zero or zero, the driving force required by the prism motor is effectively reduced, so that the power consumption is reduced.

Description

[0001] This application is a divisional application of application number 202380025334.1, which entered the Chinese national phase on September 3, 2024, and is entitled "A prism assembly, prism motor and electronic device".

[0002] This application claims priority to two Chinese patent applications filed on March 3, 2022, with application number 202210209454.4 and entitled "A Prism Assembly, Prism Motor and Electronic Device", and filed on May 24, 2022, with application number 202210570009.0 and entitled "A Prism Assembly, Prism Motor and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electronic products, and in particular to a prism assembly, a prism motor, and an electronic device. Background Technology

[0004] To meet the demands for ultra-thin and high-resolution electronic products, periscope prism motors are increasingly being used in imaging systems. However, periscope prism motors have a relatively complex structure, and current prism motors often experience vibrations, abnormal noises, and prism assembly errors during use. Summary of the Invention

[0005] This application provides a prism motor and an electronic device, the prism motor having relatively low power consumption.

[0006] In one embodiment, a prism assembly of a prism motor includes at least a prism and a prism support, the prism support having a rotation center that rotates relative to the base of the prism motor, and the prism assembly is configured such that the torque of its gravity relative to the rotation center is within a theoretical design range, the theoretical design range being a value range of zero or close to zero.

[0007] This application ensures that the torque of the prism assembly's gravity relative to the rotation center is within the theoretical design range, thus guaranteeing the static posture difference of the prism motor, reducing the risk of impact noise, and improving the prism assembly accuracy. Through reasonable configuration, the torque generated by the center of gravity of the prism assembly can be almost zero, effectively reducing the driving force required by the prism motor, thereby reducing power consumption.

[0008] In one example, the material density of the prism support is less than that of the prism. The prism assembly also includes a counterweight fixed to the prism support on the side away from the prism's center of gravity, used to balance the torque generated by at least part of the prism's gravity. In a specific example, the prism support can be made of plastic, and the prism can be made of glass. Adding a counterweight to the existing prism support achieves the goal of reducing the torque of the prism assembly's gravity relative to the rotation centerline; this improvement is relatively inexpensive.

[0009] In one example, the center of gravity of the prism assembly coincides with the center of rotation. In this example, the torque generated by the center of gravity of the prism assembly is zero, minimizing the driving force required by the prism motor and resulting in low power consumption.

[0010] In one example, the prism assembly further includes a magnet assembly fixed to the prism support, for cooperating with the drive coil of the prism motor to drive the prism assembly to rotate around the rotation center; the counterweight is the magnet assembly. This example uses the magnet assembly that generates the driving force as a counterweight, which satisfies the driving requirements while reducing the driving force of the prism motor without adding redundant components. This prism motor is relatively compact and has low power consumption.

[0011] In one example, the magnet assembly includes a first magnet and a second magnet, wherein the volume of the first magnet is larger than that of the second magnet, and the first magnet is located on the side of the second magnet away from the light-emitting surface of the prism. This increases the volume of the first magnet away from the prism, and correspondingly, the center of gravity of the prism assembly as a whole will move closer to the center of rotation, allowing for more flexible adjustments and better results.

[0012] In one example, the first magnet and the second magnet are cuboids with thickness, with adjacent sides of the first magnet and the second magnet having equal dimensions, and the other side of the first magnet having a larger dimension than the other side of the second magnet. In this example, the prism and the two magnets have a simple structure, making them easy to manufacture and install.

[0013] In one example, there are two magnetic components, located on a first and a second side of the prism support that are perpendicular to each other. The prism is a triangular prism, with the second side perpendicular to the light-gathering axis of the prism, and the first side parallel to the end face of the prism. The two magnetic components are defined as a first magnetic component and a second magnetic component. A first driving coil and a second driving coil are disposed on the base. The first driving coil, in conjunction with the first magnetic component, generates a driving force that causes the prism component to rotate about the light-gathering axis. The second driving coil, in conjunction with the second magnetic component, generates a driving force that causes the prism component to rotate about a second axis perpendicular to the plane defined by the light-gathering and light-emission axes.

[0014] In a second aspect, the present invention also provides a prism motor, including a base and the prism assembly described in any of the preceding claims.

[0015] Thirdly, the present invention also provides an electronic device including the prism motor described in any of the preceding claims.

[0016] The prism motor and electronic device of this application include the above-mentioned prism assembly, and therefore also have the above-mentioned technical effects of the prism assembly. Attached Figure Description

[0017] Figure 1 This is a general schematic diagram of the imaging module in one embodiment of this application;

[0018] Figure 2 for Figure 1 A partial 3D schematic diagram of the central prism motor;

[0019] Figure 3 for Figure 2 Sectional view of AA;

[0020] Figure 4 for Figure 2 Schematic diagram of the assembly of the central prism support, the first magnet assembly, and the elastic sheet;

[0021] Figure 5 for Figure 2 Assembly diagram of some of the components;

[0022] Figure 6 for Figure 5 Another angle view of the structure shown;

[0023] Figure 7 for Figure 6 An assembly diagram of the components excluding the second magnet assembly;

[0024] Figure 8 for Figure 1 Exploded view of the main structure.

[0025] in, Figures 1 to 8 The one-to-one correspondence between the reference numerals and component names in the attached figures is shown below:

[0026] 100 Imaging Modules; 1 Housing; 1a Light Transmitting Hole; 3 Lens Assemblies; 4 Lens Motor Carrier;

[0027] 2. Prism motor; 20. Base; 21. Prism; 211. Light-entering surface; 212. Light-exiting surface; 213. Light-reflecting surface; 22. Prism support; 220. Main body; 221. Side wall; 222. Inclined wall; 223. Protrusion; 224. First groove; 225. Second groove; 226. Cavity; 22a. First side surface; 22b. Second side surface; 23. First drive coil; 24. Second drive coil; 25. First magnet assembly; 251. First magnet; 252. Second magnet; 26. Second magnet assembly; 27. Elastic sheet; 28. Fixing frame; 29. ​​Support body; 291. Extension; 30. PCB board; 2-1. Ball part; 2-2. Liner plate. Specific Implementation

[0028] This application addresses the technical problems of vibration, abnormal noise, and prism assembly errors that commonly occur in current prism motors. The research revealed that due to the different materials used for the prism and its mounting base (the prism material has a higher density than the base), the weight of the prism is often greater than that of the base. This causes the overall center of gravity to shift towards the prism side during rotation, while the center of rotation is located on the base side. The misalignment of the center of gravity and the center of rotation results in a rotational torque caused by gravity, leading to tilting of the prism motor even when not powered, thus resulting in vibration, abnormal noise, and assembly errors. Furthermore, this gravitational torque generates a reaction force on the driving force, increasing the power consumption of the prism motor.

[0029] Based on the above findings, this application proposes a technical solution that can eliminate or reduce the probability of the above-mentioned technical problems occurring.

[0030] Please refer to Figure 1 and Figure 8 , Figure 1 This is a general schematic diagram of the imaging module in one embodiment of this application. Figure 8 for Figure 1 Exploded view of the main structure.

[0031] This application provides an electronic device, including an imaging module 100, which includes a prism motor 2, a lens assembly 3, and a lens motor carrier 4. Figure 1 Lens assembly 3 (not shown) is obscured by housing 1. Lens assembly 3 is located in Figure 1 The prism motor 2 is located on the right side. The prism motor 2 and lens assembly 3 can be assembled inside the housing 1, which primarily protects the components located within it. The housing 1 has a light-transmitting hole 1a; external light first enters the prism motor 2, is refracted by the prism motor 2, and then enters the lens assembly 3. Figure 1The diagram shows the main optical path direction S entering the prism motor 2, the outgoing optical path direction S1 after refraction by the prism motor 2, and the light entering the lens assembly along the outgoing optical path direction S1. For electronic devices, S is usually the thickness direction of the electronic device, and S1 is usually the length direction of the electronic device.

[0032] Please refer to Figures 2 to 4 , Figure 2 for Figure 1 A partial 3D schematic diagram of the prism motor. Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 Schematic diagram of the assembly of the central prism support, the first magnet assembly, and the elastic sheet.

[0033] The prism motor 2 further includes a base 20, a first drive coil, a prism 21, and a prism support 22. Please refer to [reference needed]. Figure 3 The prism 21 can be a triangular prism, which is a prism with a right-angled triangle cross-section. Its circumference includes three surfaces connected end to end: light-inlet surface 211, light-outlet surface 212, and light-reflecting surface 213. The light-inlet surface 211 and the light-outlet surface 212 are usually perpendicular, and the light-reflecting surface 213 is an inclined surface connecting the light-inlet surface 212 and the light-outlet surface 212. Figure 2 Only the light-gathering surface 211 is shown in the image; other light-gathering surfaces can be combined. Figure 3 It is understood that the absence of a three-dimensional representation of other light surfaces does not impede the understanding of the technical solution described herein by those skilled in the art. External light enters prism 21 through the light-inlet surface, is reflected by the light-reflecting surface, and exits prism 21 through the light-outlet surface. The light-reflecting surface is typically mounted opposite the inclined wall 222 of the prism support. Prism 21 is not limited to the triangular prism described herein; it can also be other types of prisms. Its main function is to change the light propagation path to meet the requirements of the lens assembly 5's mounting position. This paper continues to introduce the technical solution and its effects using prism 21 as a triangular prism as an example.

[0034] Please see Figure 4 In one specific example, the prism support 22 includes a main body 220 with two side walls 221 and an inclined wall 222 between the two side walls 221. The inclined wall 222 and the side walls 221 enclose a mounting space for mounting the prism 21. For a triangular prism, the mounting space is approximately an angular structure matching the triangular prism. The reflecting surface of the prism 21 faces the inclined wall 222. Figures 3 to 6As can be seen, the prism 21 can be mostly located within the mounting space formed by the inclined wall 222 and the two side walls 221, which facilitates the adjustment of the prism 21's position. Alternatively, the prism 21 can be entirely located within the mounting space, with sufficient space reserved between the prism 21 and the prism support 22 to allow for position adjustment and achieve image stabilization of the imaging module.

[0035] Prism 21 is fixed to prism support 22 to form a prism assembly. Prism 21 can be fixed to prism support 22 by applying adhesive, for example, by applying adhesive between the two side walls 221 of prism support 22 and the corresponding side walls of prism 21. Of course, the fixing of prism 21 to prism support 22 is not limited to the method described herein, and can also be done in other ways.

[0036] The prism assembly is rotatably supported on the base 20, and typically the prism support 22 is rotatably supported on the base 20. That is, the prism support 22 has a rotation center O relative to the base 20 of the prism motor 2.

[0037] The prism assembly in this application is configured such that the torque of its gravity relative to the rotation center O is within the theoretical design range, which is a numerical range of zero or close to zero.

[0038] This application ensures that the torque of the prism assembly relative to the rotation center O is within the theoretical design range, thus guaranteeing the static posture difference of the prism motor, reducing the risk of resonance and abnormal noise from shaking and impact, improving the assembly accuracy of the prism, and through reasonable configuration, the torque generated by the center of gravity of the prism assembly can be almost zero or zero, effectively reducing the driving force required by the prism motor, thereby reducing power consumption.

[0039] In this application, the prism 21 is made of glass, and the prism support 22 is made of plastic. Of course, the materials of the prism 21 and the prism support 22 are not limited to those described herein. Generally, the material density of the prism support 22 is less than that of the prism 21. Therefore, the center of gravity of the assembly formed by assembling the prism 21 and the prism support 22 will be biased towards the prism 21 and not located at the center of the assembly. The rotation center O is usually located at the center of the prism assembly. In order to make the center of gravity of the prism assembly as close as possible to the rotation center, the prism assembly of this application is further configured as follows.

[0040] In one example, the prism assembly also includes a counterweight component fixed to the prism support 22 on the side away from the center of gravity of the prism 21. In this embodiment, the distance between the center of gravity O' of the prism assembly formed by the prism 21, the prism support 22 and the counterweight component and the center of rotation O is relatively small or coincident, so that the gravity of the prism assembly formed by the prism, the prism support and the counterweight component is relatively small relative to the torque of the center of rotation.

[0041] This allows for the addition of counterweight components to the existing prism support 22, resulting in a smaller torque relative to the rotation center of the prism assembly and lower improvement costs.

[0042] Ideally, the center of gravity O' of the prism assembly should coincide with the center of rotation O, so that the prism assembly will hardly generate torque on the center of rotation O under static conditions.

[0043] The shape and material of the counterweight components can be reasonably selected according to the specific product. Even if the structural parameters of the counterweight components are not disclosed in this article, this will not cause any obstacle to those skilled in the art in understanding and implementing the above-described technical solutions. When the image stabilization function is operated on the imaging module, the power for the rotation of the prism assembly relative to the rotation center O can come from the magnet assembly and the drive coil, one of which is installed on the prism assembly and the other is installed on the base. That is, the magnet assembly can be installed on the prism support 22 of the prism assembly or on the base 20. Correspondingly, the drive coil that works in conjunction with the magnet assembly can be installed on the base 20 or on the prism support 22. This article will continue to introduce the technical solutions and technical effects by taking the example of the magnet assembly being fixed to the prism support 22 of the prism assembly.

[0044] In one embodiment, the prism assembly further includes a magnet assembly fixed to the prism support 22, used to cooperate with the drive coil of the prism motor to drive the prism assembly to rotate around the rotation center O. When the drive coil is energized, a driving force is generated between the drive coil and the magnet assembly, and under the action of the driving force, the prism assembly can rotate relative to the rotation center. The direction of the driving force can also be changed by changing the direction of the current flowing into the drive coil. The drive coil typically includes a first end and a second end electrically connected to an external current. If the current flowing into the first end is defined as a forward current and the current flowing into the second end is defined as a reverse current, when a forward current flows into the drive coil, the drive coil and the magnet assembly generate a first driving force that causes the prism assembly to rotate clockwise, and when a reverse current flows into the drive coil, the drive coil and the magnet assembly generate a second driving force that causes the prism assembly to rotate counterclockwise. The first driving force and the second driving force are in opposite directions, and their magnitudes can be controlled by the magnitude of the current flowing into the drive coil.

[0045] In this embodiment, the counterweight component is a magnet assembly.

[0046] There can be more than one set of drive coils and magnet components. This paper defines the component formed by drive coils and magnet components as a drive coil component. Depending on the installation position, the drive coil component may include a first drive coil component and a second drive coil component. The first drive coil component is used to drive the prism component to rotate around the first axis Z1, and the second drive coil component is used to drive the prism component to rotate around the second axis. The first drive coil component is located on the first side 22a of the prism component, and the second drive coil component is located on the second side 22b of the prism component, wherein the first axis and the second axis are not parallel.

[0047] In this application, the prism assembly can rotate around the first axis Z1 and the second axis Z2 under the drive of the first drive coil assembly and the second drive coil assembly, respectively. The first drive coil assembly and the second drive coil assembly only occupy the space on two sides of the prism assembly, thus saving motor design space, reducing motor size, and reducing motor cost and manufacturing difficulty.

[0048] Please refer to Figure 3 In this application, the first axis Z1 is parallel to the light-gathering main axis S of the prism assembly, meaning the prism assembly can rotate around a direction parallel to the light-gathering main axis S. Ideally, the first axis Z1 coincides with the light-gathering main axis S. However, considering assembly errors and other privacy considerations, the first axis Z1 and the light-gathering main axis S may not coincide. Driven by the first drive coil assembly, the prism assembly can rotate around the first axis Z1 by a predetermined angle.

[0049] In this application, the second axis Z2 is perpendicular to the plane defined by the light-increasing principal axis S and the light-exiting principal axis S1 of the prism assembly, meaning the prism assembly can be parallel to... Figure 3 The prism assembly can rotate around point O within the cross-section shown. In other words, driven by the second drive coil assembly, the prism assembly can... Figure 3 The cross section (vertical plane) is rotated clockwise or counterclockwise around point O by a predetermined angle.

[0050] In one example, the first drive coil assembly includes a first drive coil 23 and a first magnet assembly 25, one of which is fixed to the base 20 and the other to the prism assembly. The accompanying drawings show a specific embodiment where the first drive coil 23 is fixed to the base 20 (the base is not shown, but this does not impede the understanding of the technical solution herein by those skilled in the art), and the first magnet assembly 25 is fixed to the prism support 22. Of course, the first drive coil 23 is also fixed to the prism support 22, and the first magnet assembly 25 is fixed to the base 20. Figure 2 The diagram shows the approximate direction of the driving force F generated by the current flowing through the first drive coil 23. The first magnet assembly 25 may include one magnet, or of course, two or more magnets; a specific example including two magnets is given below.

[0051] In one example, the first magnet assembly 25 includes a first magnet 251 and a second magnet 252. The volume of the first magnet 251 is larger than the volume of the second magnet 252, so the weight of the first magnet 251 is greater than the weight of the second magnet 252. Furthermore, because the first magnet 251 is located on the side of the second magnet 252 away from the light-emitting surface 22 of the prism 21, combined with... Figure 3 To understand, for a prism, the light-entry surface 211 and the light-exit surface 212 are perpendicular to each other, the refractive surface 213 is an inclined plane, and the refractive surface 213 is mounted and positioned relative to the protrusion 223 of the prism support 22. From... Figure 4 As can be seen, the inclined wall 222 of the prism support 22 has protrusions 223 at its four corners (the protrusion at the lower left corner is not shown). The refractive surface 213 of the prism 21 is partially fitted and fixed to the protrusions 223, while other positions of the refractive surface 213 of the prism 21 have gaps between it and the inclined wall. Please refer to [reference needed]. Figure 3 Understood. The torque generated by the first magnet 251 and the second magnet 252 relative to the rotation center O is equal in magnitude to the torque generated by the gravity of the prism support 22 and the prism 21 relative to the rotation center O, but in different directions.

[0052] The first magnet 251 and the second magnet 252 are typically cuboids with thickness. Adjacent sides of the first magnet 251 and the second magnet 252 have equal dimensions, while the other side of the first magnet 251 is larger than the other side of the second magnet 252. In other words, when the first magnet 251 and the second magnet 252 have the same thickness and one side has the same dimension, their sizes can be made unequal by adjusting the size of the other side.

[0053] Please combine Figure 5 and Figure 6 understand, Figure 5 for Figure 2 Assembly diagram of some of the components; Figure 6 for Figure 5 The schematic diagram of the drive coil is removed. For the first magnet assembly 25 mounted on the first side 22a, the first magnet 251 and the second magnet 252 have the same side length along the S direction and the same thickness along the S2 direction; the only difference is the size of their second side along the S1 direction. Similarly, in the second magnet assembly 26, the first magnet 251 and the second magnet 252 have the same side length along the S2 direction and the same thickness along the S direction; the difference lies in their second side length along the S1 direction.

[0054] Of course, the first magnet 251 and the second magnet 252 can also be in other shapes, as long as the above-mentioned technical effects can be achieved.

[0055] In this embodiment, the magnet component serves as a counterweight, thus solving the aforementioned technical problems in the prior art without adding redundant components.

[0056] The prism is a triangular prism, with two magnet components located on a first and a second mutually perpendicular side of the prism support. A first drive coil, in conjunction with the first magnet component, generates a driving force that causes the prism component to rotate about the light-incoming axis. A second drive coil, in conjunction with the second magnet component, generates a driving force that causes the prism component to rotate about a second axis perpendicular to the plane defined by the light-incoming and light-outcoming axes. The second side is perpendicular to the light-incoming axis of the prism, and the first side is parallel to the end face of the prism.

[0057] When the first drive coil 23 is energized, it can generate a force with the first magnet assembly 25, causing the prism support 22 to rotate around the first axis Z1.

[0058] Of course, the force generated in conjunction with the first drive coil 23 is not limited to magnets, but can also be other magnetic field components that can generate magnetic fields.

[0059] In this application, the second drive coil assembly includes a second drive coil 24 and a second magnet assembly 26, one of which is fixed to the base and the other is fixed to the prism assembly. Figure 3 The diagram illustrates a specific embodiment where the second drive coil is fixed to the base and the second magnet assembly is fixed to the prism support. Of course, the second drive coil is also fixed to the prism support, and the second magnet assembly is fixed to the base. In one example, the second magnet assembly includes a first magnet and a second magnet; the two magnets can be of equal or different sizes.

[0060] When the second drive coil 24 is energized, it can generate a force with the second magnet assembly 26, causing the prism support 22 to rotate around the second axis Z2.

[0061] Please refer to Figure 7 The first side 22a and the second side 22b of the prism support can be two mutually perpendicular surfaces. The first side 22a and the second side 22b can be respectively machined with a first groove 224 and a second groove, which are used to install the first magnet assembly and the second magnet assembly respectively.

[0062] Of course, the force generated in conjunction with the second drive coil 24 is not limited to magnets; it can also be other magnetic field components that can generate magnetic fields.

[0063] In this application, the prism support 22 is spherically supported by the base 20, and the prism support 22 rotates around the spherical support position.

[0064] Please see again Figure 3In one example, the system further includes a support 29 fixedly connected to the base 20. The support 29 has an extension 291 parallel to the light-emitting main axis S1 of the prism. The extension 291 at least partially extends into the prism support 22 and is spherically supported by the prism support 22. It should be noted that the extension 291 extending parallel to the light-emitting main axis S1 only indicates the approximate direction of the extension S1's length, not that it is absolutely parallel to the light-emitting main axis S1. Specifically, the prism support 22 may have a cavity 226 opening towards the extension. The extension 291 is inserted into the cavity 226 from the opening and contacts the spherical inner wall of the cavity 226. Specifically, the right end of the extension 291 abuts against the opposite spherical inner wall of the cavity 226, allowing the support 29 to rotate relative to its contact position with the spherical surface of the prism support 22.

[0065] Specifically, one of the end of the extension 291 and the inner wall of the cavity 226 may have a ball portion 2-1, and the other is disposed in the recess that mates with the ball portion 2-1. Figure 3 The diagram shows a specific embodiment where the extension 291 has a ball portion 2-1. This fixing method has a relatively simple structure and is easy to implement. Of course, the ball 2-1 can also be fixed to the inner wall of the cavity 226.

[0066] To improve the stability of the prism assembly positioning, an elastic tensioning component is also included. This component is tensioned between the base 20 and the prism support 22, causing the prism support 22 to abut against the support body 29. Specifically, the elastic tensioning component includes an elastic sheet. Both ends of the elastic sheet are fixedly connected to the side walls of the prism support, and the middle region is fixedly connected to the prism support. Figure 6 The diagram shows the positions of the elastic sheet in positions P1 and P2, with only the portion of the elastic sheet at position P1 showing its connection to the base. Figures 4 to 7 The partial structure of the elastic sheet 27 at position P1 is indicated by a dashed line. The main purpose of showing the partial structure of the elastic sheet 27 at position P1 is to make the overall view clear. The indication of the two positions of the elastic sheet does not affect the overall structural indication of the view, which is helpful for those skilled in the art to understand the technical solution.

[0067] The elastic sheet 27 can be made of a material with elastic deformation capability, such as a spring sheet, as long as it can provide the elastic force required for use.

[0068] In addition, the prism motor also includes a PCB board 30 electrically connected to the first drive coil 23 and the second drive coil 24.

[0069] Additionally, a wear-resistant liner 2-2 can be added between the support 29 and the prism support 22. The liner 2-2 is fixed to the cavity 226, and the extension 291 makes spherical contact with the liner 2-2. This minimizes wear on the prism support 22 caused by the extension. The liner 2-2 can be fixed inside the cavity 226 by bonding or other methods. The liner 2-2 can be installed at any location where the support 29 may come into contact with the prism support 22 during rotation to minimize wear on the prism support 22. The specific structure of the liner 2-2 can be determined according to the specific product. The shape of the liner 2-2 is not disclosed herein and does not affect the understanding and implementation of the technical solution herein by those skilled in the art.

[0070] Figure 3 The diagram shows that the liner 2-2 has an approximately L-shaped structure, and the ball 2-1 installed at the right end of the extension 291 fits into the spherical surface of the vertical wall of the liner 2-2.

[0071] In a second aspect, the present invention also provides a prism motor, including a base and the prism assembly described in any of the preceding claims.

[0072] Thirdly, the present invention also provides an electronic device including the prism motor described in any of the preceding claims.

[0073] The prism motor and electronic device of this application include the above-mentioned prism assembly, and therefore both also have the above-mentioned technical effects of the prism assembly.

[0074] The electronic device in the above embodiments can be a mobile phone, but it is not limited to mobile phones. It can also be other electronic devices. As long as the electronic device has the requirement of taking pictures, this solution can be adopted. For example, the electronic device can be a laptop computer, or it can be a wearable device, an in-vehicle device, an augmented reality (AR) / virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), or other mobile terminals. Alternatively, it can be a digital camera, an SLR camera / mirrorless camera, an action camera, a gimbal camera, a drone, or other professional shooting equipment.

[0075] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A prism motor, characterized in that, include: Base (20), prism assembly, and second drive coil (24); The prism assembly includes: Prism (21), prism support (22), and second magnet assembly (26); The prism (21) includes: a light-inlet surface (211), a light-outlet surface (212), and a light-reflecting surface (213). One side of the light-reflecting surface (213) is connected to the light-inlet surface (211), and the other side of the light-reflecting surface (213) is connected to the light-outlet surface (212). The prism support (22) includes two sidewalls (221), and an inclined wall (222) is provided between the two sidewalls (221). The prism (21) is disposed in the space between the inclined wall (222) and the two sidewalls (221). The light-reflecting surface (213) is opposite to the inclined wall (222). The prism support (22) has a second groove (225), the opening of the second groove (225) is away from the light-inlet surface (211), the second magnet assembly (26) is disposed in the second groove (225), and the second magnet assembly (26) has a first surface away from the light-inlet surface (211); The second driving coil (24) has a second surface facing the light-inlet surface (211), the first surface is opposite to the second surface, and the first orthographic projection area of ​​the second surface on the first surface does not extend beyond the side of the first surface closer to the light-outlet surface (212); The second magnet assembly (26) includes a first part and a second part, which are arranged in the second groove (225) along the light emission direction of the light emission surface (212). The weight of the first part is greater than the weight of the second part, and the distance from the first part to the light emission surface (212) is greater than the distance from the second part to the light emission surface (212). The second magnet assembly (26) and the second drive coil (24) are configured to drive the prism assembly to rotate about the rotation center; The distance between the rotation center and the center of gravity of the prism assembly is zero or close to zero.

2. The prism motor as described in claim 1, characterized in that, The second magnet assembly (26) includes a plurality of cuboid magnets. The first part and the second part have different side dimensions in the first direction, the first part and the second part have the same thickness in the second direction, and the first part and the second part have the same side dimensions in the third direction. The first direction is parallel to the light emission direction of the light-emitting surface (212), the second direction is parallel to the light-incoming surface (211), and the third direction is perpendicular to the first direction and the second direction.

3. The prism motor as described in claim 1, characterized in that, The prism motor also includes a support (29). The support (29) is connected to the base (20), and the support (29) has an extension (291) facing the light emission direction, and the extension (291) has a ball (2-1) at its end. The prism support (22) has a cavity (226) facing the extension (291), the extension (291) is inserted into the cavity (226), the ball (2-1) contacts the inner wall of the cavity (226), and the extension (291) partially overlaps with the first orthographic projection area in the second orthographic projection area of ​​the first surface.

4. The prism motor as described in claim 3, characterized in that, The prism motor also includes a liner (2-2), which is fixed to the cavity (226), and the ball (2-1) is in contact with the liner (2-2).

5. The prism motor as described in claim 1, characterized in that, The prism assembly further includes a first magnet assembly (25), the prism assembly having a first groove (224), the first magnet assembly (25) being disposed in the first groove (224), the first groove (224) being disposed on a first side surface (22a) of the prism support (22), the first side surface (22a) being parallel to the end face of the prism (21).

6. The prism motor as described in claim 1, characterized in that, The material density of the prism support (22) is less than that of the prism (21).

7. The prism motor as described in claim 6, characterized in that, The prism support (22) is made of plastic, and the prism (21) is made of glass.

8. The prism motor as described in claim 1, characterized in that, The prism motor also includes an elastic tensioning component (27), which is disposed between the base (20) and the prism support (22).

9. The prism motor as described in claim 1, characterized in that, The second magnet assembly (26) is configured to generate a first driving force under the drive of the second driving coil (24), the first driving force being used to drive the prism assembly to rotate about a second axis, wherein the second axis is perpendicular to the plane defined by the light-incoming main axis and the light-outgoing main axis of the prism assembly.

10. The prism motor as described in claim 5, characterized in that, The prism motor also includes a first drive coil (23), which is fixed to the base (20) and is opposite to the first magnet assembly (25).

11. The prism motor as claimed in claim 10, characterized in that, The first magnet assembly (25) is configured to generate a second driving force under the drive of the first driving coil (23), the second driving force being used to drive the prism assembly to rotate about a first axis, the first axis being parallel to the light-gathering main axis of the prism (21).

12. The prism motor as claimed in claim 10, characterized in that, The prism motor also includes a PCB board (30) electrically connected to the second drive coil (24) and the first drive coil (23).

13. An electronic device, characterized in that, It includes a periscope module, the periscope module comprising the prism motor according to any one of claims 1 to 12.

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