Prism assembly, prism motor and electronic equipment

Abstract

According to the prism assembly, the prism motor and the electronic equipment provided by the embodiment of the invention, the prism assembly can be applied to electronic equipment such as a mobile phone, a digital camera, wearable equipment, vehicle-mounted equipment or other portable products, and the torque of the gravity of the prism assembly relative to the rotation center is in a theoretical design range; therefore, the static posture difference of the prism motor can be ensured, the risks of resonance and abnormal sounds caused by shaking and collision are reduced, the prism assembly precision is improved, the torque generated by the gravity center of the prism assembly can be almost zero or zero through reasonable configuration, the driving force required by the prism motor is effectively reduced, and thus the power consumption is reduced.

Description

[0001] This application is a divisional application of the application with the application number 202380025334.1, the invention title of "A Prism Assembly, a Prism Motor and an Electronic Device", which entered the Chinese national phase on September 3, 2024.

[0002] This application claims the priority of two Chinese patent applications, one with the application number 202210209454.4, the invention title of "A Prism Assembly, a Prism Motor and an Electronic Device", filed with the National Intellectual Property Administration on March 3, 2022, and the other with the application number 202210570009.0, the invention title of "A Prism Assembly, a Prism Motor and an Electronic Device", filed with the Chinese National Intellectual Property Administration on May 24, 2022. The entire content of which is incorporated herein by reference. Technical Field

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

[0004] In order to meet the requirements of ultra-thinness and high pixel of electronic products, periscope prism motors are more and more widely used in imaging systems. However, the structure of the periscope prism motor is relatively complex, and current prism motors often have jitter noise and prism assembly errors during use. Summary of the Invention

[0005] An embodiment of this application provides a prism motor and an electronic device, and the prism motor has relatively low power consumption.

[0006] 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.

[0007] 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 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.

[0008] 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 a 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 having a relatively small torque of the gravity of the prism assembly relative to the rotation center line, and this improvement has a relatively low cost.

[0009] In one example, the center of gravity of the prism assembly coincides with the rotation center. In this example, the moment 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.

[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 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 has a relatively compact volume and low power consumption.

[0011] 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 a side of the second magnet away from the light exit 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 rotation center, with flexible adjustment and better effect.

[0012] 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-magnet structure are simple and easy to process and install.

[0013] In one example, the number of magnet assemblies is two, which are respectively located on a first side surface and a 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 a first magnet assembly and a second magnet assembly. A first drive coil and a second drive coil are provided 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 and the second magnet assembly cooperate to generate a driving force for the prism assembly to rotate around a second axis perpendicular to the plane determined by the light incident main axis and the light exit main axis.

[0014] 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.

[0015] In a third aspect, the present invention further provides an electronic device, including the prism motor described in any one of the above.

[0016] 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

[0017] Figure 1 It is a general schematic diagram of an imaging module in an embodiment of the present application;

[0018] Figure 2 is Figure 1 a partial three-dimensional schematic diagram of the prism motor in

[0019] Figure 3 is Figure 2 a sectional view taken along line A-A in

[0020] Figure 4 is Figure 2 a schematic assembly diagram of a prism support, a first magnet assembly, and an elastic sheet in

[0021] Figure 5 is Figure 2 a schematic assembly diagram of some components in

[0022] Figure 6 is Figure 5 another perspective schematic diagram of the structure shown in

[0023] Figure 7 is Figure 6 a schematic assembly diagram of other components except the second magnet assembly in

[0024] Figure 8 is Figure 1 an exploded view of the main structure in

[0025] 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:

[0026] 100 imaging module; 1 housing; 1a light-transmitting hole; 3 lens assembly; 4 lens motor carrier;

[0027] 2 Prism motor; 20 Base, 21 Prism; 211 Light incident surface; 212 Light exit surface; 213 Reflected light surface; 22 Prism support; 220 Main body; 221 Side wall; 222 Tilted wall; 223 Protrusion; 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 Fixed bracket; 29 Support body; 291 Extension; 30 PCB board; 2-1 Ball part; 2-2 Liner. Specific embodiment

[0028] 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 is often higher than that of the prism support it is located in, leading to the overall center of rotation tending to the prism side after the two are assembled, while the center of rotation is on the prism support side, and the center of gravity does not coincide with the center of rotation. Gravity causes a rotational torque, 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 torque will generate 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 technical problems occurring.

[0030] Please refer to Figure 1 and Figure 8 , Figure 1 is the overall schematic diagram of the imaging module in an embodiment of this application, Figure 8 is Figure 1 the exploded view of the main structure in

[0031] 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 1The main optical path direction S entering the prism motor 2 is given, and the outgoing optical path direction S1 after being refracted by the prism motor 2. The light enters the lens assembly along the outgoing optical path direction S1. For an electronic device, 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 is Figure 1 a partial three-dimensional schematic diagram of the prism motor in Figure 3 is Figure 2 the A-A cross-sectional view in Figure 4 is Figure 2 a schematic assembly diagram of the prism support, the first magnet assembly, and the elastic sheet in

[0033] 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 to Figure 3 , the prism 21 can be a triangular prism, and the triangular prism is a prism with a right-angled 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 Figure 3 , and other optical surfaces can be understood in combination with

[0034] Please see Figure 4 , in a specific example, the prism support 22 includes a main body 220. The main body 220 has two side walls 221, and 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 faces the inclined wall 222. From Figures 3 to 6As can be seen, most of the structure of the prism 21 can be located in the installation space formed 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 facilitates the adjustment of the position of the prism 21. Of course, it is not excluded that the entire 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.

[0035] 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 in this article and can also be other methods.

[0036] 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.

[0037] In this application, the torque of the gravity of the prism assembly relative to the rotation center O is configured to be within the theoretical design range, and the theoretical design range is a numerical range of zero or close to zero.

[0038] In this application, by making 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 and abnormal noises caused by shaking and impact can be reduced, and the assembly accuracy of the prism can be improved. By 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.

[0039] 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 the description in this article. Usually, 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 position 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 in this application is further set as follows.

[0040] In one example, the prism assembly further includes a counterweight member, 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 member 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 member relative to the rotation center is relatively small.

[0041] In this way, additional weight components can be added to the existing prism support 22, so that the torque of the gravity of the prism assembly relative to the rotation center is relatively small, and the improvement cost is relatively low.

[0042] Of course, the ideal state is that the center of gravity O' of the prism assembly coincides with the rotation center O. In this way, the prism assembly hardly generates torque on the rotation center O statically.

[0043] The shape and material of the weight component can be reasonably selected according to the specific product. Even if the structural parameters of the weight component are not disclosed in this article, it will not cause any obstacles to those skilled in the art to understand and implement the above technical solutions in this article. When the anti-shake function of the imaging module is operated, the power for the prism assembly to rotate relative to the rotation center O can come from the magnet assembly and the drive coil. 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. In this article, the case where the magnet assembly is fixed to the prism support 22 of the prism assembly is taken as an example to continue to introduce the technical solution and technical effect.

[0044] 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 usually 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 a positive current and the current flowing in from the second end is a negative current, when the drive coil is energized with a positive current, the drive coil and the magnet assembly generate a first driving force that makes the prism assembly rotate clockwise. When the drive coil is energized with a negative current, the drive coil and the magnet assembly generate a second driving force that makes the prism assembly 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 in.

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

[0046] There can be more than one set of driving coils and magnet assemblies. In this article, the assembly formed by the driving coil and the magnet assembly is defined as the driving coil assembly. According to different installation positions, the driving coil assembly can include a first driving coil assembly and a second driving coil assembly; the first driving coil assembly is used to drive the prism assembly to rotate around the first axis Z1, and the second driving coil assembly is used to drive the prism assembly to rotate around the second axis. The first driving coil assembly is located on the first side 22a of the prism assembly, and the second driving coil assembly is located on the second side 22b of the prism assembly, where 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 respectively under the drive of the first driving coil assembly and the second driving coil assembly, and the first driving coil assembly and the second driving 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 process difficulty.

[0048] Please refer to Figure 3 , in this application, the first axis Z1 is parallel to the light incident main axis S of the prism assembly, that is, the prism assembly can rotate around a direction parallel to the light incident main axis S. Ideally, the first axis Z1 coincides with the light incident main axis S. Considering assembly errors and other factors, the first axis Z1 and the light incident main axis S may not coincide. Under the drive of the first driving 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 determined by the light incident main axis S and the light exiting main axis S1 of the prism assembly, that is, the prism assembly can rotate around point O in the plane parallel to Figure 3 the cross-section shown. That is to say, under the drive of the second driving coil assembly, the prism assembly can rotate around point O clockwise or counterclockwise by a predetermined angle in the cross-section (vertical plane) shown in Figure 3 .

[0050] 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; the specific implementation manner in which 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 in this article) and the first magnet assembly 25 is fixed to the prism support 22 is shown in the drawings. Of course, the first driving coil 23 can also be fixed to the prism support 22 and the first magnet assembly 25 can be fixed to the base 20. Among them Figure 2 shows the general direction of the driving force F generated when the first driving coil 23 is energized. 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.

[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 that of the second magnet 252, so the weight of the first magnet 251 is greater than that of the second magnet 252. Also, since 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 Understand 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. As can be seen from Figure 4 , 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 attached and fixed to the convex portion 223, and there is a gap between the 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 torques of the gravity of the prism support 22 and the prism 21 relative to the rotation center O.

[0052] 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 sizes of the two can be made unequal by configuring the dimension of the other side.

[0053] Please combine Figure 5 and Figure 6 for understanding. Figure 5 is Figure 2 the assembly schematic diagram of some components in Figure 6 is Figure 5 the schematic diagram with the drive coil removed in . For the first magnet assembly 25 installed on the first side 22a, the first side lengths of the first magnet 251 and the second magnet 252 along the S direction and the thickness dimensions along S2 are equal, and the only difference is the different second side dimensions along the S1 direction. Similarly, in the second magnet assembly 26, the first side dimensions of the first magnet 251 and the second magnet 252 along the S2 direction are the same and the thickness along the S direction is the same, and the difference is that the second side dimensions of the two along the S1 direction are different.

[0054] 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.

[0055] In this embodiment, the magnet assembly serves as a counterweight component, so that the above-mentioned technical problems existing in the prior art can be solved without adding redundant components.

[0056] 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 driving coil cooperates with the first magnet assembly to generate a driving force for rotating the prism assembly around the incident light main axis, and the second driving 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.

[0057] When the first driving 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.

[0058] Of course, the component that cooperates with the first driving coil 23 to generate a force is not limited to a magnet, and other magnetic field components that can generate a magnetic field can also be used.

[0059] In this application, the second driving coil assembly includes a second driving 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 specific implementation manner in which the second driving coil is fixed to the base and the second magnet assembly is fixed to the prism support is shown. Of course, the second driving coil can also be fixed to the prism support and the second magnet assembly can be 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, or of course, different.

[0060] When the second driving coil 24 is energized, it can generate a force with the second magnet assembly 26 to make the prism support 22 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, and the first groove 224 and the second groove can be respectively processed on the first side 22a and the second side 22b for installing the first magnet assembly and the second magnet assembly.

[0062] Of course, the component that cooperates with the second driving coil 24 to generate a force is not limited to a magnet, and other magnetic field components that can generate a magnetic field can also be used.

[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 refer to again Figure 3, in one example, it further includes a support body 29 fixedly connected to the base 20. The support body 29 has an extension portion 291 parallel to the light-emitting main axis S1 of the prism. The extension portion 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-mentioned extension portion 291 extending parallel to the light-emitting main axis S1 only indicates the general direction of the length of the extension portion S1, and is not absolutely parallel to the light-emitting main axis S1. Specifically, the prism support 22 may have a concave cavity 226 opening towards the extension portion. The extension portion 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 portion 291 is in spherical contact with the opposite inner wall of the concave cavity 226, so that the support body 29 can rotate relative to the spherical contact position with the prism support 22.

[0065] Specifically, one of the end of the extension portion 291 and the inner wall of the concave cavity 226 may 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 The specific implementation manner in which the extension portion 291 has a spherical portion 2-1 is shown. 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.

[0066] To improve the positioning stability of the prism assembly, it further includes an elastic tension member. The elastic tension member is tensioned between the base 20 and the prism support 22 to make the prism support 22 abut against the support body 29. Specifically, the elastic tension 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 The positions of the elastic sheet when in the P1 position and in the P2 position are shown. Only the partial structure connected to the base of the elastic sheet at the P1 position is shown. Figures 4 to 7 The partial structure of the elastic sheet 27 in the P1 position is shown in dotted lines. Showing the partial structure of the elastic sheet 27 in the P1 position is mainly from the perspective of clearly identifying the overall view. The showing of the two positions of the elastic sheet does not affect the overall structure marking of the view and is beneficial 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 ability, such as a spring sheet, as long as it can provide an elastic force that meets the usage requirements.

[0068] 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.

[0069] 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 to 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 any position where the support 29 may contact 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 shape of the lining 2-2 is not disclosed in this article, which does not affect the understanding and implementation of the technical solution in this article by those skilled in the art.

[0070] Figure 3 It is shown in 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.

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

[0072] In a third aspect, the present invention also provides an electronic device, including the prism motor described in any one of the above.

[0073] 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.

[0074] The electronic device in the above embodiment can be a mobile phone. Of course, it is not limited to a mobile phone. It can also be other electronic devices. As long as the electronic device has a demand for a camera function, this solution can be adopted. For example, the electronic device can be a laptop computer, and can also be a mobile terminal such as 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), etc. Or, it can 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.

[0075] Specific examples are used in this article to elaborate on the principle and implementation manner 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 in this technical field, without departing from the principle of the present application, several improvements and modifications can 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 base (20), a prism assembly, a first drive coil (24), and a support (29); The prism assembly includes: A prism (21), a prism support (22), and a first magnet assembly (26); The prism (21) includes: a light incident surface (211), a light exiting 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 exiting 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 first groove (225). The opening of the first groove (225) faces away from the light incident surface (211). The first magnet assembly (26) is disposed in the first groove (225), and the first magnet assembly (26) has a first surface facing away from the light incident surface (211); The first drive coil (24) has a second surface facing the light incident surface (211). The first surface and the second surface are opposite to each other. The first orthographic projection area of the second surface on the first surface does not exceed the side of the first surface close to the light exiting surface (212); The first magnet assembly (26) is divided into a first part and a second part by a first axis. The weight of the first part is greater than the weight of the second part. The distance from the first part to the light exiting surface (212) is greater than the distance from the second part to the light exiting surface (212); The first axis is the axis of symmetry of the first orthographic projection area, and the first axis is perpendicular to the light exiting direction of the light exiting surface (212); The support (29) is connected to the base (20). The support (29) has an extension (291) in the light exiting direction of the light exiting surface (212); The prism support (22) has a cavity (226) facing the extension (291). The extension (291) is at least partially inserted into the cavity (226) and contacts the inner wall of the cavity (226). The second orthographic projection area of the extension (291) on the first surface partially coincides with the first orthographic projection area; wherein, The first magnet assembly (26) and the first drive coil (24) are configured to drive the prism assembly to rotate around the extension (291).

2. The prism motor according to claim 1, characterized in that, 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.

3. The prism motor according to claim 1, characterized in that, The first magnet assembly (26) includes a plurality of cuboid magnets. The sizes of the sides of the first part and the second part on the first axis are the same, and the sizes of the sides of the first part and the second part on the second axis are different, where the second axis is parallel to the light-emitting direction of the light-emitting surface (212).

4. The prism motor according to claim 1, characterized in that, The extension part (291) has a spherical part (2-1) at its end, and the spherical part (2-1) contacts the inner wall of the concave cavity (226).

5. The prism motor according to claim 4, characterized in that, The prism module further includes a lining plate (2-2), the lining plate (2-2) is fixed to the concave cavity (226), and the spherical part (2-1) contacts the lining plate (2-2).

6. The prism motor according to claim 1, characterized in that, The prism assembly further includes a second magnet assembly (25). The prism assembly has a second groove (224), the second magnet assembly (25) is disposed in the second groove (224), and the second 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).

7. The prism motor according to claim 1, characterized in that, The material density of the prism support (22) is less than the material density of the prism (21).

8. The prism motor according to claim 7, characterized in that, The material of the prism support (22) is plastic, and the material of the prism (21) is glass.

9. The prism motor according to claim 1, characterized in that, The prism motor further includes an elastic tension member (27), and the elastic tension member (27) is disposed between the base (20) and the prism support (22).

10. The prism motor according to claim 9, characterized in that, The elastic tension member (27) includes an elastic sheet (27). Both ends of the elastic sheet (27) are fixedly connected to the base (20), and the middle part of the elastic sheet (27) is fixedly connected to the prism support (22).

11. The prism motor according to claim 1, characterized in that, The first magnet assembly (26) is configured to generate a first driving force under the drive of the first drive coil (24), and the first driving force is used to drive the prism assembly to rotate around the first axis.

12. The prism motor according to claim 6, characterized in that, The prism assembly further includes a second drive coil (23). The second drive coil (23) is fixed to the base (20), and the second drive coil (23) is opposite to the second magnet assembly (25).

13. The prism motor according to claim 12, characterized in that, The second magnet assembly (25) is configured to generate a second driving force under the drive of the second drive coil (23), and the second driving force is used to drive the prism assembly to rotate around a third axis, and the third axis is parallel to the light incident main axis of the prism (21).

14. The prism motor according to claim 12, characterized in that, The prism motor further includes a PCB board (30) electrically connected to the first drive coil (24) and the second drive coil (23), and the PCB board (30) is disposed between the first drive coil (24) and the base (20).

15. An electronic device, characterized in that, A periscope module is included, and the periscope module includes the prism motor according to any one of claims 1 to 14.

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