Periscopic motor and electronic equipment
By using a capacitor component in the periscope motor to detect the lens position, the problems of large space occupation and high cost of Hall sensors are solved, realizing the miniaturization and cost reduction of the periscope motor, and improving the sensitivity and accuracy of lens position detection.
Patent Information
- Application Number
- CN202423034552.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The use of Hall sensors and magnets in existing periscope motors occupies a lot of internal space, hindering the miniaturization of the motor and increasing manufacturing costs.
By replacing the Hall sensor with a capacitor assembly, the lens movement distance is detected through the transmitting plate, receiving plate and moving plate in the capacitor assembly, and the lens position is determined by the change in capacitance signal, which reduces space occupation and lowers cost.
This has enabled the miniaturization and cost reduction of the periscope motor, while improving the sensitivity and accuracy of lens position detection.
Smart Images
Figure CN223553393U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of camera technology, and in particular to a periscope motor and electronic device. Background Technology
[0002] A periscope motor uses a prism to refract incident light, which is then focused by a lens to ensure it falls on the appropriate position on the image sensor, thus enabling the image capture function. The lens moves in the focusing direction to change the focal length. To achieve long-distance shooting without changing the size of the periscope motor, the number of lenses can be increased, allowing multiple lenses to work together to capture images at greater distances. To determine the movement distance of each lens and whether it has been adjusted to the appropriate focal length, a Hall effect sensor is used to detect the lens movement distance.
[0003] The inventors discovered at least the following drawbacks in the method of determining the movement distance of each lens: Hall sensors or driver chips with Hall detection function need to cooperate with corresponding sensing magnets to measure the position of each lens, and a corresponding Hall sensor needs to be set for each lens. Setting Hall sensors and corresponding magnets inside the periscope motor occupies a large amount of internal space, which is detrimental to the miniaturization of the motor. On the other hand, with a fixed internal space in the motor, the Hall sensors and magnets occupy a large space, and increasing the number of Hall sensors increases the manufacturing cost of the periscope motor. Utility Model Content
[0004] The purpose of this utility model embodiment is to provide a periscope motor and electronic device that reduces the internal volume occupied by the periscope motor, which is conducive to the miniaturization of the motor and reduces the cost of the periscope motor.
[0005] To address the aforementioned technical problems, embodiments of this utility model provide a periscope motor, comprising: a housing, a lens module, and a detection module; the lens module includes: multiple lenses, and lens carriers corresponding to each lens, the lens carriers being used to carry the corresponding lenses and drive the lenses to move in the focusing direction; the detection module includes: capacitor assemblies corresponding to each lens, each capacitor assembly including: a transmitting electrode, a receiving electrode, and a moving electrode, wherein the moving electrode is fixed to the lens carrier, and the transmitting electrode and the receiving electrode are both fixedly disposed on the inner surface of the housing facing the moving electrode; when the lens carrier moves in the focusing direction, the facing area between the moving electrode and the receiving electrode in the capacitor assembly corresponding to the moving lens carrier changes, and the capacitance signal generated by the capacitor assembly corresponding to the lens carrier changes; the detection module further includes: a processing unit, the processing unit being used to determine the movement of the lens carrier based on the change in the capacitance signal.
[0006] An embodiment of this utility model also provides an electronic device, including the periscope motor described above.
[0007] Compared to existing technologies, this embodiment of the invention, when a periscope motor includes multiple lenses, configures a capacitor assembly for each lens to detect the movement distance of that lens. Each capacitor assembly includes: a transmitting electrode, a receiving electrode, and a moving electrode. The moving electrode is fixed to the lens carrier, and the transmitting and receiving electrodes are both fixedly disposed on the inner surface of the housing facing the moving electrode. When the lens carrier moves in the focusing direction, the facing area between the moving electrode and the receiving electrode in the capacitor assembly corresponding to the moving lens carrier changes, and the capacitance signal generated by the capacitor assembly corresponding to the lens carrier changes. The processor can determine the movement of the lens corresponding to each capacitor assembly based on the change in the capacitance signal in each capacitor assembly. The electrodes in the capacitor assembly are all attached to the surface of the original components of the periscope motor, occupying less internal space, and the cost of the electrodes is low, which helps to save on the manufacturing cost of the periscope motor.
[0008] In addition, each capacitor assembly contains two receiving plates, which are arranged sequentially in the focusing direction.
[0009] In addition, the moving electrode plate includes a first sub-part disposed opposite to the transmitting electrode plate and a second sub-part disposed opposite to the receiving electrode plate, wherein the length of the first sub-part in the focusing direction is greater than the length of the second sub-part in the focusing direction.
[0010] In addition, the first facing area between the first sub-part and the receiving electrode is greater than the second facing area between the second sub-part and the receiving electrode.
[0011] In addition, the moving plates of different groups of capacitor assemblies are not on the same plane; the emitting plates and receiving plates of different groups of capacitor assemblies are respectively disposed on the inner surfaces of different sides of the housing, and the emitting plates and receiving plates of the same group of capacitor assemblies are on the inner surface of the same side of the housing.
[0012] In addition, the moving electrode of the same capacitor assembly includes: a first bent portion and a second bent portion extending from the first bent portion, wherein the first bent portion and the second bent portion are not on the same plane; the emitting electrode and the receiving electrode of the same capacitor assembly are respectively disposed on the inner surfaces of different sides of the housing, wherein the emitting electrode is disposed opposite to the first bent portion, and the receiving electrode is disposed opposite to the second bent portion.
[0013] In addition, the emitter plates in all capacitor assemblies are integrally molded.
[0014] In addition, the receiving electrode plate can be rectangular, triangular, or trapezoidal in shape.
[0015] In addition, each capacitor assembly has two emitter plates, which are located at opposite ends of the receiver plate. Attached Figure Description
[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0017] Figure 1 This is an exploded structural diagram of the periscope motor according to an embodiment of this solution;
[0018] Figure 2 This is a schematic diagram of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0019] Figure 3 This is a structural schematic diagram of the capacitor assembly in the periscope motor from another perspective according to an embodiment of this solution;
[0020] Figure 4 This is a schematic diagram illustrating the principle of the capacitance effect of the capacitor assembly in the periscope motor according to this embodiment;
[0021] Figure 5 This is a schematic diagram showing the displacement and capacitance value change trend of the capacitor component in the periscope motor according to the embodiment of this solution;
[0022] Figure 6 This is a schematic diagram of the arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0023] Figure 7This is a schematic diagram of the arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0024] Figure 8 This is a schematic diagram of the arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0025] Figure 9 This is a schematic diagram of the electrode arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0026] Figure 10 This is a schematic diagram of the electrode arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0027] Figure 11 This is a schematic diagram of the electrode arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;
[0028] Figure 12 This is a schematic diagram of the rectangular receiving plate of the capacitor assembly in the periscope motor according to the embodiment of this solution;
[0029] Figure 13 This is a schematic diagram of the structure of the receiving plate of the capacitor assembly in the periscope motor according to the embodiment of this solution, which is triangular;
[0030] Figure 14 This is a schematic diagram of the trapezoidal structure of the receiving plate of the capacitor assembly in the periscope motor according to the embodiment of this solution;
[0031] Figure 15 This is an exploded structural diagram of the periscope motor according to an embodiment of this solution;
[0032] Figure 16 This is a schematic diagram of the electronic device according to an embodiment of this solution. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this utility model to enable readers to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.
[0034] The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with or referenced by each other without contradiction.
[0035] Embodiments of this utility model relate to a periscope motor, such as... Figure 1As shown, the periscope motor includes: a housing 1, a lens module, and a detection module; the lens module includes: multiple lenses 21, and lens carriers 22 corresponding to each lens 21, the lens carriers 22 being used to support the corresponding lens 21 and drive the lens 21 to move in the focusing direction; the detection module includes: capacitor components 31 corresponding to each lens 21. Figure 2 and Figure 3 As shown, Figure 2 and Figure 3 The capacitor assembly 31 is shown in two different directional views. Each capacitor assembly 31 includes an emitting electrode 311, a receiving electrode 312, and a moving electrode 313. The moving electrode 313 is fixed to the lens carrier 22, and the emitting electrode 311 and the receiving electrode 312 are both fixedly disposed on the inner surface of the housing 1 facing the moving electrode 313. When the lens carrier 22 moves in the focusing direction, the facing area between the moving electrode 313 and the receiving electrode 312 in the capacitor assembly 31 corresponding to the moving lens carrier 22 changes, and the capacitance signal generated by the capacitor assembly 31 corresponding to the lens carrier 22 changes. The detection module also includes a processing unit, which is used to determine the movement of the lens carrier 22 based on the change in the capacitance signal.
[0036] In capacitor assembly 31, the emitting plate 311 utilizes the principle of forming a capacitor with the moving plate 313 and the receiving plate 312, such as... Figure 4 As shown, the emitting plate 311 is connected to the circuit board. The circuit board applies a positive voltage signal to the emitting plate 311, causing a large amount of positive charge to accumulate on its surface. Conversely, a large amount of negative charge accumulates in the area of the moving plate 313, which is directly opposite the emitting plate 311. Since the moving plate 313 is not connected to the circuit board, its charge does not transfer to the outside. Based on the principle of charge conservation, the positive charge on the moving plate 313 accumulates in another area, namely, near the receiving plate 312. The receiving plate 312, influenced by the positive charge of the moving plate 313, accumulates negative charge on its surface, thus forming a potential difference between the emitting plate 311 and the receiving plate 312, achieving the capacitance effect between them.
[0037] In this embodiment, the capacitor formed by the transmitting electrode and the receiving electrode is based on the physical formula of a parallel-plate capacitor: C = εS / 4πkd; where ε represents the dielectric constant of the medium, determined by the medium between the electrodes, such as air or water; k represents the electrostatic constant, also known as the Coulomb constant, which indicates that the force between two point charges, each with a charge of 1C, separated by a distance of 1m in a vacuum is 8.987551 × 10⁹ N, i.e., k = 8.987551 × 10⁹ N·m. 2 / C; S represents the area (projected area) of the two electrodes facing each other; d represents the vertical distance between the two electrodes. As can be seen from the formula, in this embodiment, the change in the area between the moving electrode and the receiving electrode alters the magnitude of the capacitance signal. Based on the correspondence between the change in the area and the change in the capacitance signal, the movement distance of the lens is determined.
[0038] Compared to existing technologies, this embodiment of the invention, when a periscope motor includes multiple lenses, configures a capacitor assembly for each lens to detect the movement distance of that lens. Each capacitor assembly includes: a transmitting electrode, a receiving electrode, and a moving electrode. The moving electrode is fixed to the lens carrier, and the transmitting and receiving electrodes are both fixedly disposed on the inner surface of the housing facing the moving electrode. When the lens carrier moves in the focusing direction, the facing area between the moving electrode and the receiving electrode in the capacitor assembly corresponding to the moving lens carrier changes, and the capacitance signal generated by the capacitor assembly corresponding to the lens carrier changes. The processor can determine the movement of the lens corresponding to each capacitor assembly based on the change in the capacitance signal in each capacitor assembly. The electrodes in the capacitor assembly are all attached to the surface of the original components of the periscope motor, occupying less internal space, and the cost of the electrodes is low, which helps to save on the manufacturing cost of the periscope motor.
[0039] Furthermore, each capacitor assembly contains two receiving plates 312, arranged sequentially in the focusing direction. When the moving plate 313 moves in the focusing direction, the first change in the area of the moving plate 313 facing one of the receiving plates 312 and the second change in the area of the moving plate 313 facing the other receiving plate 312 are the same. That is, the decrease in the area of the moving plate 313 facing one of the receiving plates 312 is equal to the increase in the area of the moving plate 313 facing the other receiving plate 312, or the increase in the area of the moving plate 313 facing one of the receiving plates 312 is equal to the decrease in the area of the moving plate 313 facing the other receiving plate 312. This setup facilitates subsequent differential calculations of the two capacitance signals formed by the emitting plate 311 and the two receiving plates 312 in the capacitor assembly. It allows for correction or noise reduction of the capacitance signals, eliminating noise that can affect the accuracy of the calculation results due to environmental or human factors, while also improving the sensitivity of lens position control. The differential calculation formula is: a*(C1-C2) / (C1+C2); where a represents the amplification factor, C1 represents the capacitance signal formed by the emitting plate and one of the receiving plates, and C2 represents the capacitance signal formed by the emitting plate and the other receiving plate.
[0040] Assuming the initial position of the lens is 0 displacement, and the lens travel is between -600 micrometers and +600 micrometers, the curves showing the changes in C1 and C2 detected during the lens movement are as follows: Figure 5 As shown, the solid line represents the trend change of C1, and the dashed line represents the trend change of C2.
[0041] Furthermore, the moving electrode includes a first sub-section disposed opposite to the emitting electrode and a second sub-section disposed opposite to the receiving electrode, wherein the length of the first sub-section in the focusing direction is greater than the length of the second sub-section in the focusing direction. That is, the moving electrode adopts a T-shaped structure. This structural design can increase the facing area between the emitting electrode and the moving electrode in the focusing direction and reduce the height of the emitting electrode perpendicular to the focusing direction, which is beneficial for the miniaturization of the periscope motor.
[0042] Furthermore, the first facing area between the first sub-section of the moving electrode and the receiving electrode is larger than the second facing area between the second sub-section and the receiving electrode. This design ensures the accumulation of positive and negative charges in the moving electrode, thereby ensuring the capacitance signal and improving capacitance sensitivity.
[0043] Furthermore, the moving plates of different capacitor groups are not on the same plane; the emitting and receiving plates of different capacitor groups are respectively disposed on the inner surfaces of different sides of the housing, while the emitting and receiving plates of the same capacitor group are on the inner surface of the same side of the housing. Figure 6 As shown, in one set of capacitor assembly 31, the moving electrode is directly opposite the emitting electrode and receiving electrode disposed on the side of the housing; in another set of capacitor assembly 31', the moving electrode is directly opposite the emitting electrode and receiving electrode disposed on the bottom surface of the housing. Figure 7 As shown, in one set of capacitor assembly 31, the moving plate is directly opposite to the emitting plate and receiving plate disposed on the side of the housing, and in another set of capacitor assembly 31', the moving plate is directly opposite to the emitting plate and receiving plate disposed on the other side of the housing.
[0044] In addition, when the moving plates of different capacitor groups are on the same plane, such as... Figure 2 As shown, in the capacitor assembly, the moving plate is directly opposite the emitter and receiver plates located on the side of the housing; or as... Figure 8 As shown, the moving plates in the capacitor assembly are directly opposite the emitting and receiving plates located on the ground of the casing.
[0045] Furthermore, the moving electrode of the same capacitor assembly includes a first bent portion and a second bent portion extending from the first bent portion, the first bent portion and the second bent portion are not on the same plane; the emitting electrode and the receiving electrode of the same capacitor assembly are respectively disposed on the inner surfaces of different sides of the housing, the emitting electrode is disposed opposite to the first bent portion, and the receiving electrode is disposed opposite to the second bent portion. Figure 9As shown, in a single capacitor assembly, the first bent portion of the moving plate 313 faces the emitting plate disposed on the side of the housing, and the second bent portion of the moving plate 313 faces the receiving plate disposed on the bottom of the housing, thus improving space utilization. Alternatively, the emitting plate and the receiving plate can also be disposed on opposite sides of the housing.
[0046] Furthermore, the emitter plates in all capacitor assemblies are integrally formed, allowing the same positive voltage signal to be applied to all emitter plates. Subsequent capacitor signal calculations only require consideration of the charge change at the receiving plate, simplifying the calculation process. In addition to the integrally formed emitter plates in all capacitor assemblies, multiple emitter plates can also be incorporated into each capacitor assembly, such as... Figure 10 and Figure 11 The diagram shows two different structural designs for capacitor components, each with two emitter plates positioned at opposite ends of the receiver plate to form a symmetrical structure. Figure 10 The moving electrode is designed with an I-shaped structure, which is suitable for situations where the transmitting and receiving electrodes are located on the bottom surface of the housing. Figure 11 Designing the moving electrode plate as an L-shape increases the direct contact between the moving and emitting electrodes, which helps ensure the capacitance signal. Furthermore, due to the larger spatial distance between the moving electrodes, the L-shaped design is suitable for periscope motors with a large stroke.
[0047] In addition, the shape of the receiving electrode can be rectangular, triangular, or trapezoidal. For example... Figure 12 As shown, the receiving electrode is rectangular in shape; as Figure 13 As shown, the receiving electrode is triangular in shape; as Figure 14 As shown, the receiving electrode is trapezoidal in shape.
[0048] In addition, such as Figure 15 As shown, the periscope motor also includes a drive module for driving the lens to move in the focusing direction. The drive module includes a magnet 41 and a coil 42. The magnet 41 is fixed to the lens carrier, and the coil 42 is fixed to the base 5. Each lens in the periscope motor is equipped with a separate drive module, enabling independent control of each individual lens.
[0049] The periscope motor described above can have two, three, or more lenses. The number of lenses is related to the focal length requirement for shooting, and there is no limit to the number of lenses here.
[0050] Another feasible embodiment of this utility model relates to an electronic device, such as... Figure 16As shown, it includes the periscope motor as described above. Incident light enters the periscope motor through the light-transmitting plate 6, is reflected by the prism assembly 7, and then passes through multiple lenses 21 in sequence to reach the photosensitive chip 7. The incident light's propagation direction is changed by the reflecting mirrors in the prism assembly, allowing the incident light to penetrate the lens 21 perpendicularly and reach the photosensitive chip 7.
[0051] Compared with related technologies, the electronic device provided in this embodiment of the present invention is equipped with the periscope motor provided in the aforementioned embodiments. Therefore, it also has the technical effects provided in the aforementioned embodiments, which will not be elaborated here.
[0052] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.
Claims
1. A periscope motor, characterized in that, include: Housing, lens module, and testing module; The lens module includes: multiple lenses, and lens carriers that correspond one-to-one with each lens. The lens carriers are used to carry the corresponding lens and drive the lens to move in the focusing direction. The detection module includes: a capacitor assembly corresponding to each lens, each capacitor assembly including: an emitting electrode, a receiving electrode and a moving electrode, wherein the moving electrode is fixed to the lens carrier, and the emitting electrode and the receiving electrode are both fixedly disposed on the inner surface of the housing facing the moving electrode. When the lens carrier moves in the focusing direction, the area between the moving electrode plate and the receiving electrode plate in the capacitor assembly corresponding to the moving lens carrier changes, and the capacitance signal generated by the capacitor assembly corresponding to the lens carrier changes. The detection module further includes a processing unit, which is used to determine the movement of the lens carrier based on the changes in the capacitance signal.
2. The periscope motor according to claim 1, characterized in that, Each capacitor assembly contains two receiving plates, which are arranged sequentially in the focusing direction.
3. The periscope motor according to claim 1, characterized in that, The moving electrode plate includes a first sub-part disposed opposite to the transmitting electrode plate and a second sub-part disposed opposite to the receiving electrode plate, wherein the length of the first sub-part in the focusing direction is greater than the length of the second sub-part in the focusing direction.
4. The periscope motor according to claim 3, characterized in that, The first facing area between the first sub-part and the receiving electrode is greater than the second facing area between the second sub-part and the receiving electrode.
5. The periscope motor according to claim 1, characterized in that, The moving plates of different capacitor assemblies are not on the same plane; The emitter and receiver plates of different groups of capacitor assemblies are respectively disposed on the inner surface of different sides of the housing, and the emitter and receiver plates of the same group of capacitor assemblies are located on the inner surface of the same side of the housing.
6. The periscope motor according to claim 1, characterized in that, The moving plate of the same capacitor assembly includes: a first bent portion and a second bent portion extending from the first bent portion, wherein the first bent portion and the second bent portion are not on the same plane; The emitter plate and receiver plate of the same capacitor assembly are respectively disposed on the inner surface of different sides of the housing. The emitter plate is disposed opposite to the first bent portion, and the receiver plate is disposed opposite to the second bent portion.
7. The periscope motor according to any one of claims 1 to 6, characterized in that, The emitter plate in all capacitor assemblies is integrally molded.
8. The periscope motor according to claim 1, characterized in that, The receiving electrode plate is rectangular, triangular, or trapezoidal in shape.
9. The periscope motor according to claim 1, characterized in that, Each capacitor assembly has two emitter plates, which are located at opposite ends of the receiver plate.
10. An electronic device, characterized in that, include: The periscope motor as described in any one of claims 1 to 9.