A prism assembly, a prism motor, and an electronic device

Abstract

A prism assembly, a prism motor, and an electronic device. The prism assembly of the present 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 so that the torque of its gravity relative to the rotation center is within the theoretical design range, the static posture difference of the prism motor can be ensured, the risks of resonance, shaking, and impact noise can be reduced, and the prism assembly accuracy can be improved. 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 for the prism motor, thereby achieving a reduction in power consumption.

Description

[0001] This application claims the priority of two Chinese patent applications, namely, an invention titled "A Prism Assembly, Prism Motor and Electronic Device" with an application number of 202210209454.4 filed with the China National Intellectual Property Administration on March 3, 2022, and an invention titled "A Prism Assembly, Prism Motor and Electronic Device" with an application number of 202210570009.0 filed with the China National Intellectual Property Administration on May 24, 2022. The entire contents of both are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic products, and particularly to a prism assembly, a prism motor and an electronic device. Background Art

[0003] In order to meet the requirements of thinner and higher pixel electronic products, periscope prism motors are increasingly widely used in imaging systems. However, the structure of periscope prism motors is relatively complex, and current prism motors often experience jitter, abnormal noise, and prism assembly errors during use. Summary of the Invention

[0004] Embodiments of this application provide a prism motor and an electronic device, and the prism motor has relatively low power consumption.

[0005] In a specific embodiment, a prism assembly of a prism motor includes at least a prism and a prism support. The prism support has a rotation center that rotates relative to the base of the prism motor. The prism assembly is configured such that the torque of its gravity relative to the rotation center is within a theoretical design range, and the theoretical design range is a numerical range of zero or close to zero.

[0006] By making the torque of the gravity of the prism assembly relative to the rotation center within the theoretical design range, this application can ensure the static posture difference of the prism motor, reduce the risk of impact abnormal noise, improve the prism assembly accuracy, and by reasonable configuration, the moment generated by the center of gravity of the prism assembly can be almost zero, effectively reducing the driving force required for the prism motor, thereby achieving power consumption reduction.

[0007] In one example, the material density of the prism support is less than that of the prism. The prism assembly further includes a counterweight member fixed to the side of the prism support away from the center of gravity of the prism for balancing at least part of the torque generated by the gravity of the prism. In a specific example, the prism support can be made of plastic, and the prism can be made of glass. Adding an additional counterweight member to the current prism support can achieve the purpose of making the torque of the gravity of the prism assembly relative to the rotation center line relatively small, and this improvement has a relatively low cost.

[0008] 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, which minimizes the driving force required by the prism motor and results in low power consumption.

[0009] 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 center of rotation; the counterweight member is the magnet assembly. In this example, the magnet assembly that generates the driving force is used as the counterweight member, which can not only meet the driving requirements but also reduce the driving force of the prism motor without adding redundant components. The prism motor is relatively compact in size and has low power consumption.

[0010] In one example, the magnet assembly includes a first magnet and a second magnet. 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 output surface of the prism. In this way, the volume of the first magnet increases towards the side away from the prism, and correspondingly, the overall center of gravity position of the prism assembly will also move closer to the center of rotation, with flexible adjustment and better effect.

[0011] In one example, the first magnet and the second magnet are rectangular parallelepipeds with thickness. The adjacent side dimensions of the first magnet and the second magnet are equal, and the other side dimension of the first magnet is larger than that of the second magnet. In this example, the prism and the two magnets have a simple structure and are easy to process and install.

[0012] In one example, the number of the magnet assemblies is two, which are respectively located on the first side surface and the second side surface perpendicular to each other of the prism support. The prism is a triangular prism, the second side surface is perpendicular to the light incident main axis of the prism, and the first side surface is parallel to the end surface of the prism. The two magnet assemblies are respectively defined as the first magnet assembly and the second magnet assembly. A first drive coil and a second drive coil are arranged on the base. The first drive coil cooperates with the first magnet assembly to generate a driving force for the prism assembly to rotate around the light incident main axis, and the second drive coil cooperates with the second magnet assembly to generate a driving force for the prism assembly to rotate around the second axis perpendicular to the plane determined by the light incident main axis and the light output main axis.

[0013] In a second aspect, the present invention further provides a prism motor, including a base and the prism assembly described in any one of the above.

[0014] In a third aspect, the present invention further provides an electronic device, including the prism motor described in any one of the above.

[0015] The prism motor and the electronic device of the present application include the above prism assembly, so they also have the above technical effects of the prism assembly. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall imaging module in an embodiment of the present application;

[0017] Figure 2 is Figure 1 Partial three-dimensional diagram of the prism motor in

[0018] Figure 3 is Figure 2 A - A cross-sectional view in

[0019] Figure 4 is Figure 2 Assembly diagram of the prism support, the first magnet assembly, and the elastic sheet in

[0020] Figure 5 is Figure 2 Assembly diagram of some components in

[0021] Figure 6 is Figure 5 Another perspective diagram of the structure shown in

[0022] Figure 7 is Figure 6 Assembly diagram of the components other than the second magnet assembly in

[0023] Figure 8 is Figure 1 Exploded view of the main structure in

[0024] Among them, Figures 1 to 8 The one-to-one correspondence between the reference numerals and the component names in the drawings is as follows:

[0025] 100 Imaging module; 1 Housing; 1a Light-transmitting hole; 3 Lens assembly; 4 Lens motor carrier; 2 Prism motor; 20 Base, 21 Prism; 211 Light incident surface; 212 Light exit surface; 213 Reflecting light surface; 22 Prism support; 220 Main body; 221 Side wall; 222 Inclined wall; 223 Convex part; 224 First groove; 225 Second groove; 226 Concave cavity; 22a First side; 22b Second side; 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 bracket; 29 Support body; 291 Extension part; 30 PCB board; 2 - 1 Ball part; 2 - 2 Liner. Detailed implementation manners

[0026] In view of the technical problems that the current prism motor is prone to jitter, abnormal noise and prism assembly error during use, this application has conducted in-depth research and found that: since the materials of the current prism and the prism support that fixes it are different, the density of the prism material is relatively large, and the density of the prism support is relatively light. As a result, the weight of the prism often exceeds that of the prism support it is located in, causing the overall center of gravity to tend to the prism side after assembly, while the rotation center is on the side of the prism support, and the center of gravity does not coincide with the rotation center. Gravity causes a rotational moment, resulting in the prism motor tilting when not powered on, and thus prone to jitter, abnormal noise and prism assembly error. At the same time, the center of gravity moment generates a reaction force on the driving force, increasing the power consumption of the prism motor.

[0027] Based on the above findings, this application proposes a technical solution that can eliminate or reduce the probability of the above technical problems occurring.

[0028] Please refer to Figure 1 and Figure 8 , Figure 1 which is the overall schematic diagram of the imaging module in an embodiment of this application, Figure 8 and Figure 1 is the exploded view of the main structure in

[0029] This application embodiment provides an electronic device, including an imaging module 100, the imaging module 100 includes a prism motor 2, a lens assembly 3 and a lens motor carrier 4. Figure 1 The lens assembly 3 (blocked by the housing 1) is not shown in Figure 1 , and the lens assembly 3 is located at the right side of the prism motor 2 in Figure 1 . The prism motor 2 and the lens assembly 3 can be assembled inside the housing one. The housing 1 mainly plays a role in protecting the components located inside it. The housing 1 is provided with a light-transmitting hole 1a, and external light first enters the prism motor 2 and then enters the lens assembly 3 after being refracted by the prism motor 2. Among them,

[0030] Please refer to Figures 2 to 4 , Figure 2 which is Figure 1 the partial three-dimensional schematic diagram of the prism motor in Figure 3 and Figure 2 is the sectional view taken along A-A in Figure 4 and Figure 2 is the assembly schematic diagram of the prism support, the first magnet assembly and the elastic sheet in

[0031] Among them, the prism motor 2 further includes a base 20, a first drive coil, a prism 21 and a prism support 22. Please refer toFigure 3 The prism 21 can be a triangular prism, which is a prism with a right triangle cross-section. Its peripheral surface includes three surfaces connected end to end in sequence: a light incident surface 211, a light exit surface 212, and a light reflecting surface 213. The light incident surface 211 and the light exit surface 212 are usually perpendicular, and the light reflecting surface 213 is an inclined surface connecting between the light incident surface 212 and the light exit surface 212. Figure 2 Only the light incident surface 211 is shown in [reference], and other light surfaces can be understood in combination. Figure 3 The three-dimensional structure without showing other light surfaces does not prevent those skilled in the art from understanding the technical solutions herein. External light enters the prism 21 through the light incident surface, is reflected by the light reflecting surface, and then exits the prism 21 through the light exit surface. The light reflecting surface is usually installed opposite to the inclined wall 222 of the prism support. The prism 21 is not limited to the triangular prism described herein. Of course, it can also be other forms of prisms. Its main function is to change the light propagation path to meet the requirements of the installation position of the lens assembly 5. Herein, taking the prism 21 as a triangular prism as an example, the technical solutions and technical effects will be further introduced.

[0032] Please refer to Figure 4 , in a specific example, the prism support 22 includes a main body 220. The main body 220 has two side walls 221. There is an inclined wall 222 between the two side walls 221. The inclined wall 222 and the two side walls 221 enclose an installation space for installing the prism 21. For a triangular prism, the installation space is generally an angular structure matching the triangular prism. The light reflecting surface of the prism 21 is opposite to the inclined wall 222. As can be seen from Figures 3 to 6 , most of the structure of the prism 21 can be located in the installation space enclosed by the inclined wall 222 and the two side walls 221 for installing the prism 21. It is not necessary that the entire prism 21 is completely located inside this installation space, which is convenient for adjusting the position of the prism 21. Of course, it is not excluded that the whole prism 21 is completely located inside this installation space, and enough space is reserved between the prism 21 and the prism support 22 to facilitate the adjustment of the position of the prism 21 to achieve the anti-shake function of the imaging module.

[0033] The prism 21 is fixed on the prism support 22 to form a prism assembly. The prism 21 can be fixed to the prism support 22 by dispensing glue. For example, glue is dispensed and fixed between the two side walls 221 of the prism support 22 and the corresponding side walls of the prism 21. Of course, the fixation of the prism 21 and the prism support 22 is not limited to the description herein and can also be other methods.

[0034] The prism assembly is rotationally supported on the base 20. Usually, the prism support 22 and the base 20 are rotationally supported. That is, the prism support 22 has a rotation center O that rotates relative to the base 20 of the prism motor 2.

[0035] 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, and the theoretical design range is a numerical range of zero or close to zero.

[0036] In this application, by keeping the torque of the gravity of the prism assembly relative to the rotation center O within the theoretical design range, the static posture difference of the prism motor can be ensured, the risks of resonance, shaking, and impact noise can be reduced, and the prism assembly accuracy can be improved. 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 achieving power consumption reduction.

[0037] In this application, the material of the prism 21 is glass, and the material of the prism support 22 is 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 the prism 21 and the prism support 22 will be biased towards the prism 21 side and not at the center of the assembly, while 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.

[0038] In one example, the prism assembly further includes a counterweight component, which is fixed to the prism support 22 and on the side far 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 rotation center O is relatively small or coincides, so that the torque of the gravity of the prism assembly formed by the prism, the prism support, and the counterweight component relative to the rotation center is relatively small.

[0039] In this way, by adding an additional counterweight component to the existing prism support 22, the torque of the gravity of the prism assembly relative to the rotation center can be made relatively small, and the improvement cost is relatively low.

[0040] Of course, the ideal state is that the center of gravity O' of the prism assembly coincides with the rotation center O, so that the prism assembly hardly generates torque on the rotation center O statically.

[0041] The shape and material of the counterweight component can be reasonably selected according to the specific product. Even if the structural parameters of the counterweight component are not disclosed herein, this will not cause any obstacles to those skilled in the art to understand and implement the above technical solutions herein. When performing the anti-shake function operation on the imaging module, the power for the prism assembly to rotate relative to the rotation center O can come from the magnet assembly and the drive coil, and one of them is installed on the prism assembly and the other is installed on the base. That is to say, 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 cooperates with the magnet assembly can be installed on the base 20 or on the prism support 22. Herein, the technical solutions and technical effects are continued to be introduced by taking the magnet assembly fixed to the prism support 22 of the prism assembly as an example.

[0042] In one embodiment, the prism assembly further includes a magnet assembly fixed to the prism support 22, which is 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. Under the action of the driving force, the prism assembly can rotate relative to the rotation center. By changing the direction of the current flowing into the drive coil, the direction of the driving force can also be changed. The drive coil generally includes a first end and a second end electrically connected to an external current. If the current flowing in from the first end is defined as the forward current and the current flowing in from the second end is the reverse current, when the drive coil is energized with the forward current, the drive coil and the magnet assembly generate a first driving force that causes the prism assembly to rotate clockwise. When the drive coil is energized with the reverse current, 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 opposite in direction, and their magnitudes can be controlled by the magnitude of the current flowing in.

[0043] In this embodiment, the counterweight component is the magnet assembly.

[0044] There can be more than one set of drive coils and magnet assemblies. In this article, the assembly formed by the drive coil and the magnet assembly is defined as the drive coil assembly. According to different installation positions, the drive coil assembly can include a first drive coil assembly and a second drive coil assembly; the first drive coil assembly is used to drive the prism assembly to rotate around the first axis Z1, and the second drive coil assembly is used to drive the prism assembly to rotate around the second axis. The first drive coil assembly is located on the first side 22a of the prism assembly, and the second drive coil assembly is located on the second side 22b of the prism assembly, where the first axis and the second axis are not parallel.

[0045] In this application, the prism assembly can rotate around the first axis Z1 and the second axis Z2 respectively under the drive of the first drive coil assembly and the second drive coil assembly, and the first drive coil assembly and the second drive coil assembly only occupy the space of two sides of the prism assembly, thus saving the motor design space, reducing the motor size, and at the same time reducing the motor cost and the process difficulty.

[0046] Please refer to Figure 3 , in this application, the first axis Z1 is parallel to the incident light main axis S of the prism assembly, that is, the prism assembly can rotate around a direction parallel to the incident light main axis S. Ideally, the first axis Z1 coincides with the incident light main axis S. Considering assembly errors and other factors, the first axis Z1 and the incident light main axis S may not coincide. Under the drive of the first drive coil assembly, the prism assembly can rotate around the first axis Z1 by a predetermined angle.

[0047] In this application, the second axis Z2 is perpendicular to the plane determined by the incident light main axis S and the outgoing light main axis S1 of the prism assembly, that is, the prism assembly can be in parallel with Figure 3rotates around point O within the shown cross-section. That is to say, driven by the second driving coil assembly, the prism assembly can Figure 3 rotate clockwise or counterclockwise around point O within the shown cross-section (vertical plane) by a predetermined angle.

[0048] In one example, the first driving coil assembly includes a first driving coil 23 and a first magnet assembly 25, one of which is fixed to the base 20 and the other is fixed to the prism assembly; in the drawings, the specific implementation manner is shown where the first driving coil 23 is fixed to the base 20 (the base is not shown, but it does not prevent those skilled in the art from understanding the technical solution herein), and the first magnet assembly 25 is fixed to the prism support 22. Of course, the first driving coil 23 can also be fixed to the prism support 22, and the first magnet assembly 25 is fixed to the base 20. Among them Figure 2 it is shown the approximate direction of the driving force F generated when current is passed through the first driving coil 23. The first magnet assembly 25 can include one magnet, and of course, it can also have two or more magnets. The following gives a specific example including two magnets.

[0049] 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 that of the second magnet 252, so the weight of the first magnet 251 is greater than that of the second magnet 252. Also, 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 it is understood that for a triangular prism, the light-incident surface 211 and the light-emitting surface 212 are perpendicular to each other, and the refracting surface 213 is an inclined surface. The refracting surface 213 is oppositely installed and positioned with the convex portion 223 of the prism support 22. From Figure 4 it can be seen that convex portions 223 are provided at the four corners of the inclined wall 222 of the prism support 22 (the lower left convex portion is not shown). A part of the refracting surface 213 of the prism 21 is fitted and fixed with the convex portion 223, and there are gaps between other positions of the refracting surface 213 of the prism 21 and the inclined wall. Please refer to Figure 3 for understanding. The torques generated by the first magnet 251 and the second magnet 252 relative to the rotation center O are equal in magnitude and opposite in direction to the torque of the combined gravity of the prism support 22 and the prism 21 relative to the rotation center O.

[0050] The first magnet 251 and the second magnet 252 are generally rectangular parallelepipeds. The first magnet 251 and the second magnet 252 are rectangular parallelepipeds with thickness. The adjacent side dimensions of the first magnet 251 and the second magnet 252 are equal, and the other side dimension of the first magnet 251 is larger than the other side dimension of the second magnet 252. That is to say, when the first magnet 251 and the second magnet 252 have the same thickness and the same dimension on one side, the difference in their sizes can be achieved by configuring the dimension of the other side.

[0051] Please understand in combination with Figure 5 and Figure 6 that Figure 5 is Figure 2 the assembly schematic diagram of some components in Figure 6 is Figure 5 the schematic diagram of removing the drive coil in . For the first magnet assembly 25 mounted on the first side 22a, the first magnet 251 and the second magnet 252 are equal in both the length of the first side along the S direction and the thickness dimension along S2. The only difference is the dimension of the second side along the S1 direction. Similarly, in the second magnet assembly 26, the first magnet 251 and the second magnet 252 are the same in the dimension of the first side along the S2 direction and the same in the thickness along the S direction. The difference lies in that the dimensions of their second sides along the S1 direction are different.

[0052] Of course, the first magnet 251 and the second magnet 252 can also be of other shapes, as long as the above technical effects can be achieved.

[0053] In this embodiment, the magnet assembly serves as a counterweight component, so that the above technical problems existing in the prior art can be solved without adding redundant components.

[0054] The prism is a triangular prism, and the number of magnet assemblies is two, which are respectively located on the first side and the second side perpendicular to each other of the prism support. The first drive coil cooperates with the first magnet assembly to generate a driving force for rotating the prism assembly around the incident light main axis. The second drive coil and the second magnet assembly cooperate to generate a driving force for rotating the prism assembly around the second axis perpendicular to the plane determined by the incident light main axis and the outgoing light main axis. The second side is perpendicular to the incident light main axis of the prism, and the first side is parallel to the end face of the prism.

[0055] When the first drive coil 23 is energized, it can generate a force with the first magnet assembly 25 to make the prism support 22 rotate around the first axis Z1.

[0056] Of course, the component that cooperates with the first drive coil 23 to generate a force is not limited to the magnet, and it can also be other magnetic field components that can generate a magnetic field.

[0057] 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 shows the specific implementation manner in which 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 can also be 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, and the two magnets can be of equal size, and of course, they can also be different.

[0058] When the second drive coil 24 is energized, it can generate a force with the second magnet assembly 26 to cause the prism support 22 to rotate about the second axis Z2.

[0059] 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 processed with a first groove 224 and a second groove respectively, which are used to install the first magnet assembly and the second magnet assembly respectively.

[0060] Of course, the component that cooperates with the second drive coil 24 to generate a force is not limited to a magnet, and can also be other magnetic field components that can generate a magnetic field.

[0061] In this application, the prism support 22 is spherically supported by the base 20, and the prism support 22 rotates about the spherical support position.

[0062] Please refer to again Figure 3 , in one example, it further includes a support 29 fixedly connected to the base 20. The support 29 has an extension 291 parallel to the light output 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 above extension 291 extending parallel to the light output main axis S1 only represents the general direction of the length of the extension S1, and is not absolutely parallel to the light output main axis S1. Specifically, the prism support 22 can have a concave cavity 226 opening towards the extension. The extension 291 is inserted into the concave cavity 226 from the opening and is in spherical contact with the inner wall of the concave cavity 226. Specifically, the right end of the extension 291 is in spherical contact with the opposite inner wall of the concave cavity 226, so that the support 29 can rotate relative to the spherical contact position with the prism support 22.

[0063] Specifically, one of the end of the extension 291 and the inner wall of the concave cavity 226 can have a spherical portion 2-1, and the other is provided with a concave portion that cooperates with the spherical portion 2-1. Figure 3 shows a specific implementation manner in which the extension 291 has a spherical portion 2-1. This fixing method has a relatively simple structure and is easy to implement. Of course, the sphere 2-1 can also be fixed to the inner wall of the concave cavity 226.

[0064] To improve the positioning stability of the prism assembly, it further includes an elastic tensioning member. The elastic tensioning member is tensioned between the base 20 and the prism support 22 to make the prism support 22 abut against the support 29. Specifically, the elastic tensioning member includes an elastic sheet. Both ends of the elastic sheet are fixedly connected to the two side walls of the prism support, and the middle region is fixedly connected to the prism support. Figure 6 shows the positions of the elastic sheet when it is in the P1 position and the P2 position, where only the partial structure of the elastic sheet connected to the base is shown at the P1 position. Figures 4 to 7The partial structure of the elastic sheet 27 at position P1 is shown in dashed lines. The reason for showing the partial structure of the elastic sheet 27 at position P1 is mainly for the sake of clearly identifying the overall view. The showing of the two positions of the elastic sheet does not affect the marking of the overall view structure, which is beneficial for those skilled in the art to understand the technical solution.

[0065] The elastic sheet 27 can be made of a material with elastic deformation ability, such as a spring sheet, etc., as long as it can provide an elastic force that meets the usage requirements.

[0066] In addition, the prism motor further includes a PCB board 30 electrically connected to the first drive coil 23 and the second drive coil 24.

[0067] In addition, a wear-resistant lining 2-2 can be added between the support 29 and the prism support 22. The lining 2-2 is fixed in the concave cavity 226, and the extension 291 is in spherical contact with the lining 2-2. This can minimize the wear of the extension on the prism support 22. The lining 2-2 can be fixed inside the concave cavity 226 by bonding or other means. The lining 2-2 can be provided at all positions where the support 29 may come into contact with the prism support 22 during rotation to minimize the wear on the prism support 22 as much as possible. The specific structure of the lining 2-2 can be determined according to the specific product. The fact that the shape of the lining 2-2 is not disclosed in this article does not affect the understanding and implementation of the technical solution in this article by those skilled in the art.

[0068] Figure 3 It is shown that the lining 2-2 is generally in an L-shaped structure, and the sphere 2-1 installed at the right end of the extension 291 is in spherical fit with the vertical wall of the lining 2-2.

[0069] In a second aspect, the present invention further provides a prism motor, including a base and the prism assembly described in any one of the above.

[0070] In a third aspect, the present invention further provides an electronic device, including the prism motor described in any one of the above.

[0071] The prism motor and the electronic device of the present application include the above prism assembly, so the two also have the above technical effects of the prism assembly.

[0072] The electronic device in the above embodiments may be a mobile phone. Of course, it is not limited to mobile phones, but may also be other electronic devices. As long as the electronic device has a need for a camera function, this solution can be adopted. For example, the electronic device may be a laptop computer, or may also be a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA) and other mobile terminals. Or, it may also be a professional shooting device such as a digital camera, a single-lens reflex camera / mirrorless camera, an action camera, a gimbal camera, a drone, etc.

[0073] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A prism motor, characterized in that, Comprising: A prism assembly, a second drive coil (24), and a support (29); The prism assembly includes: A prism (21), a prism support (22), and a second magnet assembly (26); The prism (21) includes: a light incident surface (211), a light exit surface (212), and a light reflecting surface (213). One side of the light reflecting surface (213) is connected to the light incident surface (211), and the other side of the light reflecting surface (213) is connected to the light exit surface (212); The prism support (22) includes two side walls (221). There is an inclined wall (222) between the two side walls (221). The space between the inclined wall (222) and the two side walls (221) is provided with the prism (21), and the light reflecting surface (213) faces the inclined wall (222); The prism support (22) has a second groove (225). The opening of the second groove (225) faces away from the light incident surface (211), and the second magnet assembly (26) is disposed in the second groove (225); The second magnet assembly (26) includes a first magnet and a second magnet. The volume of the first magnet is larger than the volume of the second magnet, and the first magnet is located on the side of the second magnet away from the prism light exit surface; The support (29) is connected to the base (20), and the support (29) has an extension (291) in the light exit direction facing the light exit surface (212); The prism support (22) has a cavity (226) facing the extension (291). At least a part of the extension (291) is inserted into the cavity (226) and contacts the inner wall of the cavity (226); wherein, The second magnet assembly (26) and the second drive coil (24) are configured to drive the prism assembly to rotate around the extension (291); Wherein, the distance between the rotation center of the prism assembly rotating around the extension (291) and the center of gravity of the prism assembly is zero or close to zero.

2. The prism motor according to claim 1, characterized in that, The material density of the prism support is less than the material density of the prism. The prism assembly further includes a counterweight member fixed to the side of the prism support away from the center of gravity of the prism.

3. The prism motor according to claim 1, characterized in that, The first magnet and the second magnet are rectangular parallelepipeds with thickness. The adjacent side dimensions of the first magnet and the second magnet are equal, and the other side dimension of the first magnet is larger than the other side dimension of the second magnet.

4. The prism motor according to any one of claims 1 to 3, characterized in that, The prism motor further includes a first magnet assembly (25).

5. The prism motor according to claim 4, wherein, The prism assembly has a first groove (224). The first magnet assembly (25) is disposed in the first groove (224). The first groove (224) is disposed on the first side surface (22a) of the prism support (22), and the first side surface (22a) is parallel to the end surface of the prism (21).

6. The prism motor according to claim 1, characterized in that, The material of the prism is glass, and the material of the prism support is plastic.

7. An electronic device, characterized in that, Including the prism motor according to any one of claims 1 to 6.

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