Periscopic motor and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of camera shooting, and discloses a periscopic motor and electronic equipment. The periscopic motor comprises a lens module and a detection module, the detection module comprises capacitor assemblies in one-to-one correspondence with the lenses in the lens module, and each capacitor assembly comprises a transmitting polar plate, a receiving polar plate, a connecting piece for connecting the transmitting polar plates in the multiple capacitor assemblies, and a transmitting polar plate wiring terminal arranged on the connecting piece; under the condition that any lens carrier moves, the connecting piece and the emitting polar plates in the multiple groups of capacitor assemblies are in a state of keeping connection; under the condition that the lens carrier moves in the focusing direction, the opposite area between the transmitting polar plate and the receiving polar plate in the capacitor assembly corresponding to the moving lens carrier is changed, and a capacitance signal generated by the capacitor assembly corresponding to the lens carrier is changed; the detection module further comprises a processing unit, and the processing unit is used for determining the movement condition of the lens carrier according to the change condition of the capacitance signal.

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] The periscope motor uses a prism to refract incident light, which is then focused through a lens to ensure that the incident light falls on the appropriate position of the image sensor, thus enabling the shooting function. To determine the lens movement distance and whether the correct focal length has been achieved, a Hall effect sensor is used to detect the lens movement distance.

[0003] The inventors discovered at least the following drawbacks in determining the lens's movement distance: Hall sensors or driver chips with Hall detection functionality require a corresponding sensing magnet to measure the lens position. Integrating Hall sensors and corresponding magnets within the periscope motor occupies a significant amount of internal space, hindering miniaturization. Furthermore, with a fixed internal space, the large space occupied by Hall sensors and magnets, coupled with an increased number of Hall sensors, raises 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] Periscope motors are categorized into single-lens motors and multi-lens motors based on the number of lenses they contain. A single-lens motor can focus at a specific focal length. When achieving imaging across a continuous focal length, digital zoom cropping and image processing are used for other focal lengths beyond the specific focal length. For example, a single lens in a periscope motor can focus at specific focal lengths of 80mm, 110mm, and 140mm within the 80mm to 140mm focal length range. In the intermediate focal lengths between 80mm and 110mm, and between 110mm and 140mm, digital zoom cropping and image processing are used to achieve the desired imaging effect. An image produced by a single lens alone would be blurry, as the focus cannot be accurately projected onto the image sensor.

[0006] Multi-lens motors, due to the presence of multiple lens sets, can utilize one set to achieve telephoto capabilities while another set corrects and compensates for the image focus, ensuring it falls precisely on the image sensor, thus achieving continuous optical zoom. This invention addresses the problem of detecting the movement distance of each lens in a multi-lens motor by proposing a periscope motor structure.

[0007] 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 supporting the corresponding lenses and driving the lenses to move in the focusing direction; the detection module includes: capacitor assemblies corresponding to each lens, each capacitor assembly including: an emitting electrode and a receiving electrode, wherein the emitting electrode is fixed to the lens carrier, and the receiving electrode is fixedly disposed on the inner surface of the housing facing the emitting electrode; the detection module further includes: connecting multiple sets of capacitors The assembly includes a connector for the emitting electrode plate and emitting electrode plate terminals disposed on the connector; when any of the lens carriers moves, the connector remains connected to the emitting electrodes in the multiple sets of capacitor assemblies; when the lens carrier moves in the focusing direction, the facing area between the emitting 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 change in the capacitance signal.

[0008] An embodiment of this utility model also provides an electronic device, including the periscope motor described above.

[0009] 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 its movement distance. Each capacitor assembly includes a transmitting electrode and a receiving electrode, wherein the transmitting electrode is fixed to the lens carrier, and the receiving electrode is fixedly disposed on the inner surface of the housing facing the transmitting electrode. The transmitting electrodes in multiple sets of capacitor assemblies are connected by connectors, and the connectors are provided with transmitting electrode terminals, thereby unifying the electrical signals of the transmitting electrodes in multiple sets of capacitor assemblies. When the lens carrier moves in the focusing direction, the facing area between the transmitting 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 set of capacitor assemblies. Since the aforementioned connectors and transmitting electrode terminals unify the electrical signals on the transmitting electrodes in multiple sets of capacitor assemblies, the calculation of the capacitance signal only needs to consider the charge change of the receiving electrode, simplifying the calculation of the capacitance signal. The plates in the capacitor assembly are all attached to the surface of the original components of the periscope motor, occupying less internal space. Moreover, the cost of the plates is low, which helps to save on the manufacturing cost of the periscope motor.

[0010] In addition, the connector is a slide rail structure.

[0011] In addition, when the number of emitting plates connected by the connector is two, the two emitting plates are respectively connected to the two ends of the slide rail structure, and the connection position of each emitting plate to the slide rail structure is movable relative to the slide rail structure in the focusing direction.

[0012] In addition, each of the emitting plates extends toward the slide rail structure to form a strip-shaped extension, the end of the extension being connected to the end of the slide rail structure, and the end of the extension being movable relative to the slide rail structure in the focusing direction.

[0013] In addition, the connector is a deformable conductor.

[0014] In addition, when the connector is used to connect two emitting electrodes, each emitting electrode is connected to a corresponding deformable conductor, and all deformable conductors are connected to the emitting electrode terminals; when the lens carrier moves in the focusing direction, the deformable conductor remains connected to the emitting electrode and the emitting electrode terminals, while changing the distance between the emitting electrode and the emitting electrode terminals by deformation.

[0015] In addition, the deformable conductor is a flexible circuit board or a spring sheet.

[0016] In addition, the receiving electrode plate can be rectangular, triangular, or trapezoidal in shape.

[0017] In addition, each capacitor assembly contains two receiving plates, which are centrally symmetrical. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an exploded structural diagram of the periscope motor according to an embodiment of this solution;

[0020] Figure 2 This is a schematic diagram of the capacitor assembly in the periscope motor according to an embodiment of this solution;

[0021] Figure 3 This is a structural diagram of the periscope motor with a slide rail structure in this embodiment of the solution;

[0022] Figure 4 This is a structural schematic diagram based on the case where the connecting component in the periscope motor is a deformable conductor in this embodiment of the solution;

[0023] Figure 5 This is a schematic diagram showing the displacement and capacitance value change trend of one set of capacitor components in the periscope motor according to an embodiment of this solution;

[0024] Figure 6 This is a schematic diagram showing the displacement and capacitance value change trend of the second group of capacitor components in the periscope motor according to the embodiment of this solution;

[0025] Figure 7 This is a schematic diagram of the arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;

[0026] 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;

[0027] Figure 9 This is a schematic diagram of the arrangement of the capacitor assembly in the periscope motor according to an embodiment of this solution;

[0028] Figure 10 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;

[0029] Figure 11 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 12 This is another structural schematic diagram of the capacitor assembly in the periscope motor according to the embodiment of this solution, where the receiving plate is trapezoidal.

[0031] Figure 13 This is a schematic diagram of another structure in which the receiving plate of the capacitor assembly in the periscope motor is triangular, according to an embodiment of this solution.

[0032] Figure 14 This is an exploded structural diagram of the periscope motor according to an embodiment of this solution;

[0033] Figure 15 This is a schematic diagram of the electronic device according to an embodiment of this solution. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] Embodiments of this utility model relate to a periscope motor, such as... Figure 1 As 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 assemblies 3 corresponding to each lens 21. Taking two sets of capacitor assemblies as an example, as... Figure 2 The diagram shows the positional relationship between the emitting and receiving plates in two sets of capacitor assemblies. Each set of capacitor assemblies 3 includes an emitting plate 31 and a receiving plate 32. The emitting plate 31 is fixed to the lens carrier 22, and the receiving plate 32 is fixedly disposed on the inner surface of the housing 1 facing the emitting plate 31. When the lens carrier 22 moves in the focusing direction, the emitting plate 31 in the capacitor assembly 3 corresponding to the moving lens carrier 22 moves with the lens carrier 22, thereby changing the facing area between it and the fixed receiving plate 32. This causes a change in the capacitance signal generated by the capacitor assembly 3 corresponding to the lens carrier 22. The detection module also includes a processing unit, which determines the movement of the lens carrier 22 based on the change in the capacitance signal.

[0037] like Figure 3 and Figure 4 As shown, the detection module includes a connector that connects the emitting plates of multiple capacitor assemblies, and emitting plate terminals on the connector that provide electrical signals to the emitting plates. The connector maintains a connection with the emitting plates in all lens carrier movements. To ensure this connection, two different connector configurations are described below:

[0038] like Figure 3The connector shown is a slide rail structure 41. When the connector is used to connect two emitting electrode plates 31, the two emitting electrode plates 31 are respectively connected to the two ends of the slide rail structure 41, and the connection position of each emitting electrode plate 31 with the slide rail structure 41 is movable relative to the slide rail structure 41 in the focusing direction. Each emitting electrode plate 31 extends towards the slide rail structure 41 to form a strip-shaped extension 311. The end of the extension 311 is connected to the end of the slide rail structure 41, and the end of the extension 311 is movable relative to the slide rail structure 41 in the focusing direction. The end of the extension 311 protrudes and is provided with a retaining part that matches the shape of the slide groove of the slide rail structure 41. The retaining part reciprocates within the slide groove. The surface of the retaining part is smooth to reduce friction with the slide groove during reciprocating movement. The slide groove in the slide rail structure 41 is made of metal. The transmitter plate terminal set on the slide rail structure 41 is connected to the slide groove. No matter where the transmitter plate 31 moves, since the transmitter plate 31 is in contact with the slide groove, the connection between the transmitter plate 31 and the transmitter plate terminal is ensured by the slide groove as the transmission medium of the electrical signal.

[0039] like Figure 4 The connector shown is a deformable conductor 42. When the connector is used to connect two emitting plates 31, each emitting plate 31 is connected to its corresponding deformable conductor 42. That is, one deformable conductor 42 is provided for each emitting plate 31, and at least two deformable conductors are connected to the same emitting plate terminal 33. In this embodiment, all the deformable conductors 42 corresponding to the emitting plates in the two sets of capacitor assemblies in the periscope motor are connected to the same emitting plate terminal 33. When the lens carrier moves in the focusing direction, the deformable conductor 42 maintains its connection with the emitting plate 31 and the emitting plate terminal 33 while changing the distance between the emitting plate 31 and the emitting plate terminal 33 through deformation.

[0040] The deformable conductor is a flexible circuit board or a spring. When the deformable conductor is a flexible circuit board, the flexible circuit board can be arranged reasonably according to the internal space of the periscope motor. Specifically, the flexible circuit board is strip-shaped, with one end connected to the emitting electrode plate and the other end connected to the emitting electrode plate terminal. Flexible circuit boards corresponding to different emitting electrodes can be unconnected to each other. When the emitting electrode plate is displaced, the distance between the emitting electrode plate and the fixed-position emitting electrode plate terminal changes, generating a compressive or tensile force on the flexible circuit board. When a compressive force is applied to the flexible circuit board, the flexible circuit board is compressed, causing the middle area of ​​the flexible circuit board to bend and fold. When a tensile force is applied to the flexible circuit board, the flexible circuit board is stretched, causing the folded area in the middle area of ​​the flexible circuit board to extend to both ends, thereby lengthening the distribution length of the flexible circuit board in the focusing direction, always maintaining the connection between the two ends of the flexible circuit board and the emitting electrode plate terminal respectively. Similarly, when the deformable conductor is a spring sheet, since the spring sheet can change its shape under the action of external force, when a squeezing or stretching force is applied to the spring sheet, it can also ensure that the two ends of the spring sheet are always connected to the emitting electrode plate and the emitting electrode plate terminal respectively, thus avoiding the problem of the electrical signal being disconnected during the movement of the emitting electrode plate.

[0041] In this embodiment, the capacitance formed by the transmitting and receiving plates 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 plates, 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 × 10⁻⁶. 9 N, i.e., k = 8.987551 × 10 9 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, changes in the area of ​​the facing electrodes between the transmitting and receiving electrodes alter the magnitude of the capacitance signal. Based on the correspondence between the change in the facing area and the change in the capacitance signal, the lens movement distance is determined.

[0042] Furthermore, each capacitor assembly contains two receiving plates 32, which are centrally symmetrical. When the emitting plate 31 moves in the focusing direction, the first change in the area of ​​the emitting plate 31 facing one of the receiving plates 32 and the second change in the area of ​​the emitting plate 31 facing the other receiving plate 32 are the same. That is, the decrease in the area of ​​the emitting plate 31 facing one of the receiving plates 32 is equal to the increase in the area of ​​the emitting plate 31 facing the other receiving plate 32, or the increase in the area of ​​the emitting plate 31 facing one of the receiving plates 32 is equal to the decrease in the area of ​​the emitting plate 31 facing the other receiving plate 32. This arrangement facilitates subsequent differential calculations of the two capacitance signals formed by the emitting plate 31 and the two receiving plates 32 in the capacitor assembly, and allows for correction or noise reduction of the capacitance signals. This eliminates noise that affects the accuracy of the calculation results due to environmental factors or human operation, while also improving the sensitivity of lens position movement control. The differential calculation formula can be: a*(C1-C2) / (C1+C2); where a represents the amplification factor, C1 represents the capacitance signal formed by the transmitting plate and one of the receiving plates, and C2 represents the capacitance signal formed by the transmitting plate and the other receiving plate.

[0043] Assuming the initial lens position is 0 displacement and the lens travel is between -600 micrometers and +600 micrometers, the curves showing the changes in the capacitance formed by the emitting plate and the two receiving plates in the capacitor assembly of one lens group during the lens movement are as follows: Figure 5 As shown, curve 1 represents the capacitance change of one capacitor in the capacitor assembly, and curve 2 represents the capacitance change of the other capacitor in the same assembly. The curves showing the capacitance changes of the two capacitors formed by the emitting plate and the two receiving plates in another lens assembly detected during lens movement are shown below. Figure 6 As shown, curve 3 represents the capacitance value trend of one capacitor in the capacitor group, and curve 4 represents the capacitance value trend of the other capacitor in the same group. Figure 5 and Figure 6 The two sets of capacitor assemblies shown have the same setting for the emitting and receiving plates. Therefore, the capacitance values ​​generated by the two sets of capacitor assemblies change with the lens moving distance in roughly the same way. If the emitting and receiving plates in the two sets of capacitor assemblies are set in different ways, such as differences in the arrangement and size of the plates, the corresponding capacitance values ​​will also change with the lens moving distance in different ways.

[0044] Furthermore, the emitter and receiver plates of different capacitor groups can be disposed on the inner surface of the same side of the housing, with all receiver plates on the same plane. For example... Figure 1As shown, the receiving plates in both sets of capacitor assemblies are located on the same side of the housing, or, as... Figure 7 As shown, the receiving plates in both sets of capacitor assemblies are located on the bottom surface of the housing. Based on the layout of the periscope motor's internal structure, the emitting and receiving plates in different sets of capacitor assemblies can also be located on the inner surfaces of different sides of the housing. For example... Figure 8 As shown, in one set of capacitor assembly 3, the receiving plate is located on the bottom surface of the housing, while in another set of capacitor assembly, the receiving plate is located on the side surface of the housing. The positions of the emitting plates in each set of capacitor assembly correspond to the positions of the receiving plates within that set. Besides the above arrangement, it can also be arranged as follows... Figure 9 As shown, in one set of capacitor assembly 3, the receiving plate is located on the left side of the housing, and in the other set of capacitor assembly 3, the receiving plate is located on the right side of the housing. The receiving plates in the two sets of capacitor assemblies are parallel but not on the same plane. The position of the emitting plate in each set of capacitor assemblies corresponds to the position of the receiving plate in that set. The arrangement of the connectors is designed according to the positions of the emitting plates in the multiple sets of capacitor assemblies. It is necessary to ensure that the connectors are not located between the emitting plates and the receiving plates to avoid affecting the capacitance value generated by the capacitor assembly and to ensure the accuracy of the lens movement distance detection.

[0045] In addition, the shape of the receiving electrode can be rectangular, trapezoidal, or triangular. For example... Figure 2 As shown, the receiving electrode is rectangular in shape, and when two receiving electrodes are used, they are arranged sequentially in the focusing direction. Figure 10 and Figure 12 As shown, the receiving electrode is trapezoidal in shape. Figure 10 and Figure 12 The arrangement of the receiving electrode plates varies to accommodate periscope motors at different heights. For example... Figure 11 and Figure 13 As shown, the receiving electrode is triangular in shape. Figure 11 and Figure 13 The right-angle side dimensions of the triangular electrode plate can be set differently to adapt to periscope motors of different heights.

[0046] In addition, such as Figure 14As 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 51 and a coil 52. The magnet 51 is fixed to the lens carrier, and the coil 52 is fixed to the base 53. The housing is divided into an upper housing and a lower housing. The base 53 is embedded in the plastic part of the lower housing, and the receiving electrode is integrally formed with the lower housing through embedded injection molding. In the periscope motor, each lens is provided with a separate drive module to achieve independent control of a single lens. The periscope motor also includes a prism assembly 7, which is used to reflect the incident light so that the incident light can enter each group of lenses perpendicularly. If a spatial rectangular coordinate system is designed with the rotation center of the prism assembly as the intersection of the coordinate axes, the two rotation directions of the prism assembly are the X-axis and the Y-axis, and the lens movement direction (focusing direction) is parallel to the Z-axis.

[0047] 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.

[0048] Another feasible embodiment of this utility model relates to an electronic device, such as... Figure 15 As 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 8. 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 8.

[0049] 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.

[0050] 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 lenses and drive the lenses to move in the focusing direction. The detection module includes: a capacitor assembly corresponding to each lens, each capacitor assembly including: an emitting electrode plate and a receiving electrode plate, wherein the emitting electrode plate is fixed to the lens carrier, and the receiving electrode plate is fixedly disposed on the inner surface of the housing facing the emitting electrode plate; The detection module further includes: a connector for connecting the emitting plates in the multiple sets of capacitor assemblies, and emitting plate terminals disposed on the connector; the connector and the emitting plates in the multiple sets of capacitor assemblies remain connected in any movement of the lens carrier. When the lens carrier moves in the focusing direction, the area between the emitting plate and the receiving 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, The connector is a slide rail structure.

3. The periscope motor according to claim 2, characterized in that, When the connector is used to connect two emitting plates, the two emitting plates are respectively connected to the two ends of the slide rail structure, and the connection position of each emitting plate to the slide rail structure is movable relative to the slide rail structure in the focusing direction.

4. The periscope motor according to claim 3, characterized in that, Each of the emitting electrode plates extends toward the slide rail structure to form a strip-shaped extension, the end of the extension being connected to the end of the slide rail structure, and the end of the extension being movable relative to the slide rail structure in the focusing direction.

5. The periscope motor according to claim 1, characterized in that, The connector is a deformable conductor.

6. The periscope motor according to claim 5, characterized in that, When the number of emitting plates connected by the connector is two, each emitting plate is connected to a corresponding deformable conductor, and all deformable conductors are connected to the terminals of the emitting plates. When the lens carrier moves in the focusing direction, the deformable conductor remains connected to the emitting electrode and the emitting electrode terminal while changing the distance between the emitting electrode and the emitting electrode terminal by deformation.

7. The periscope motor according to claim 5, characterized in that, The deformable conductor is a flexible circuit board or a spring sheet.

8. The periscope motor according to any one of claims 1 to 7, characterized in that, The receiving electrode plate is rectangular, triangular, or trapezoidal in shape.

9. The periscope motor according to any one of claims 1 to 7, characterized in that, Each capacitor assembly contains two receiving plates, which are centrally symmetrical.

10. An electronic device, characterized in that, include: The periscope motor as described in any one of claims 1 to 9.

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