Focus motor and image pickup apparatus
By replacing the Hall sensor with a capacitor plate in the focusing motor, and using two capacitance values to control the movement of the mover, the problems of large size and high cost of the focusing motor are solved, achieving miniaturization and cost reduction, while improving focusing accuracy and driving force.
Patent Information
- Application Number
- CN202423092838.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-13
AI Technical Summary
The focusing motors in existing camera equipment are large and expensive, mainly due to the large space occupied and high cost of Hall sensors.
A capacitor plate consisting of a first stator plate, a second stator plate, and a mover plate replaces the Hall sensor. The processing unit controls the movement of the mover based on the two capacitance values to achieve focusing.
The size and cost of the focusing motor have been reduced, while the sensitivity of the capacitive signal has been improved, thus increasing focusing accuracy and driving force.
Smart Images
Figure CN223599943U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] Embodiments of the present disclosure relate to the technical field of camera shooting, and in particular to a focusing motor and a camera shooting device. BACKGROUND
[0002] With the development of camera shooting technology, in order to quickly and stably achieve focusing, the camera module in most camera shooting devices currently usually adopts a closed-loop control method, detects the real-time position of a mover support in a focusing motor during focusing, and adjusts the driving current of a driving lens according to the detected position of the mover support, so that the mover support can quickly reach an accurate focusing position. When detecting the real-time position of the mover support, a Hall sensor and a corresponding magnet for sensing are usually used for detection. However, the arrangement of the Hall sensor and the magnet inside the motor occupies a large internal space, making the volume of the focusing motor large, which is not conducive to the miniaturization of the motor. In addition, the Hall sensor has a high cost, which is not conducive to reducing the cost of the focusing motor.
[0003] Therefore, the volume and cost of the focusing motor in the related art need to be reduced. CONTENT OF THE UTILITY MODEL
[0004] Embodiments of the present disclosure provide a focusing motor and a camera shooting device, which can at least reduce the volume and cost of the focusing motor, and can also improve the capacitance signal sensitivity.
[0005] According to some embodiments of the present disclosure, in one aspect, a focusing motor is provided, which includes: a stator; a mover configured to be connected with a lens; a sensing assembly including a first stator pole plate, a second stator pole plate, and a mover pole plate, the first stator pole plate and the second stator pole plate are fixedly connected with the stator, the mover pole plate is fixedly connected with the mover, the first stator pole plate and the second stator pole plate are oppositely arranged, and the mover pole plate is arranged between the first stator pole plate and the second stator pole plate, the mover pole plate and the first stator pole plate have a first directly facing area, and the mover pole plate and the second stator pole plate have a second directly facing area, wherein the first stator pole plate and the mover pole plate form a first capacitor, the second stator pole plate and the mover pole plate form a second capacitor, and the mover moves to simultaneously reduce or increase the first directly facing area and the second directly facing area; a processing unit connected with the first stator pole plate and the second stator pole plate, and also connected with the mover pole plate, the processing unit controls the mover to move in a focusing direction of the lens based on a first capacitor value of the first capacitor and a second capacitor value of the second capacitor.
[0006] In some embodiments, the first stator pole plate, the second stator pole plate, and the stator are an integrally formed structure.
[0007] In some embodiments, the first stator pole plate and the second stator pole plate communicate to form a U-shaped groove, and the mover pole plate is located in the U-shaped groove and is movable along the focusing direction of the lens.
[0008] In some embodiments, the distance between the mover pole plate and the first stator pole plate is equal to the distance between the mover pole plate and the second stator pole plate.
[0009] In some embodiments, the mover pole plate and the mover are integrally formed.
[0010] In some embodiments, the stator has four sides, and two adjacent sides are perpendicular to each other; the focusing motor further comprises four magnets, the magnets correspond to the sides one by one, and the center of the magnet coincides with the center of the side corresponding to the magnet; a coil is arranged on the mover and is located inside the magnet.
[0011] In some embodiments, the focusing motor comprises a plurality of sensing assemblies; the magnets and the sensing assemblies are arranged around the circumference of the lens, and a sensing assembly is located in the corner region between adjacent magnets.
[0012] In some embodiments, the focusing motor further comprises a first metal spring plate, the first metal spring plate comprises a first spring plate and a second spring plate, the first spring plate is connected with the mover pole plate, and the first stator pole plate and the second stator pole plate are connected with the second spring plate; a first metal suspension wire is electrically connected with the first spring plate; a second metal suspension wire is electrically connected with the second spring plate; a flexible circuit board is electrically connected with the first metal suspension wire and the second metal suspension wire.
[0013] In some embodiments, the focusing motor further comprises a base, the flexible circuit board is arranged on the base; an outer shell is connected with the base to form a containing cavity, and the containing cavity contains at least the stator.
[0014] According to some embodiments of the present disclosure, another aspect of the present disclosure provides a camera device, comprising a lens and a focusing motor as described in the above embodiments for driving the lens, and the lens is arranged on the mover of the focusing motor.
[0015] The technical solutions provided by the embodiments of the present disclosure have at least the following advantages:
[0016] The technical scheme of the focusing motor provided in the embodiments of the present disclosure includes: a stator; a mover, which is used to be connected with a lens; a sensing assembly, which includes a first stator pole plate, a second stator pole plate and a mover pole plate, the first stator pole plate and the second stator pole plate are fixedly connected with the stator, the mover pole plate is fixedly connected with the mover, the first stator pole plate and the second stator pole plate are oppositely arranged, and the mover pole plate is arranged between the first stator pole plate and the second stator pole plate, the mover pole plate and the first stator pole plate have a first facing area, and the mover pole plate and the second stator pole plate have a second facing area, wherein the first stator pole plate and the mover pole plate form a first capacitor, the second stator pole plate and the mover pole plate form a second capacitor, and the mover moves to make the first facing area and the second facing area simultaneously decrease or simultaneously increase; a processing unit, which is connected with the first stator pole plate and the second stator pole plate, and is also connected with the mover pole plate, and controls the mover to move in the focusing direction of the lens based on a first capacitor value of the first capacitor and a second capacitor value of the second capacitor. The first stator pole plate, the second stator pole plate and the mover pole plate are arranged in the focusing motor, the first stator pole plate and the mover pole plate form the first capacitor, the second stator pole plate and the mover pole plate form the second capacitor, when the mover moves, the first facing area and the second facing area simultaneously increase or simultaneously decrease, so that the first capacitor value and the second capacitor value simultaneously change, the processing unit can judge the position of the mover according to the first capacitor value and the second capacitor value and control the mover to move in the focusing direction, so that the mover reaches a target position and the focusing of the focusing motor is realized. In this way, the first capacitor and the second capacitor formed by the three pole plates can replace the Hall sensor, and the cost and the occupied space of the pole plates relative to the Hall sensor are small, so that the cost and the volume of the focusing motor can be reduced. In addition, compared with the scheme in which the capacitor value of one capacitor formed by one stator pole plate and one mover pole plate is used to control the movement of the mover, the processing unit according to the embodiments of the present disclosure controls the movement of the mover according to two capacitor values, which can improve the sensitivity of the capacitor signal.
[0017] Compared with the scheme in the related art in which a Hall sensor is used as the sensing assembly, the first stator pole plate, the second stator pole plate and the mover pole plate are used as the sensing assembly in the embodiments of the present disclosure, and the cost and the occupied space of the capacitor pole plates relative to the Hall sensor are small, so that the cost and the volume of the focusing motor according to the embodiments of the present disclosure can be small. In addition, the processing unit according to the embodiments of the present disclosure controls the movement of the mover according to two capacitor values, which can improve the sensitivity of the capacitor signal, compared with the scheme in which the capacitor value of one capacitor formed by one stator pole plate and one mover pole plate is used to control the movement of the mover. BRIEF DESCRIPTION OF DRAWINGS
[0018] One or more embodiments are illustrated by way of example in the drawings hereof, which are not intended to limit the embodiments and which will be described in detail in the description hereinafter and in the appended drawings hereof. If not indicated otherwise, the drawings are not to scale. For illustration purposes, the drawings hereof will be described in the following order.
[0019] Figure 1 An exploded view of the focus motor according to an embodiment of the present disclosure;
[0020] Figure 2 A structural schematic view of the focus motor according to an embodiment of the present disclosure;
[0021] Figure 3 A sectional view of the focus motor according to an embodiment of the present disclosure;
[0022] Figure 4 A partial structural schematic view of the focus motor according to an embodiment of the present disclosure;
[0023] Figure 5 A structural schematic view of the first stator pole plate and the second stator pole plate according to an embodiment of the present disclosure;
[0024] Figure 6 Another partial structural schematic view of the focus motor according to an embodiment of the present disclosure;
[0025] Figure 7 Still another partial structural schematic view of the focus motor according to an embodiment of the present disclosure. DETAILED DESCRIPTION
[0026] As known from the background, the volume and cost of the focus motor in the related art need to be reduced.
[0027] The embodiments of the present disclosure provide a focus motor and a camera arrangement. In the focus motor, the first stator pole plate, the second stator pole plate and the mover pole plate are used to replace the Hall sensor in the related art, and the cost and the occupied space of the capacitor pole plate are smaller than those of the Hall sensor, so that the cost and the volume of the focus motor can be reduced. In addition, compared with the scheme of using the capacitance value of one capacitor composed of one stator pole plate and one mover pole plate to control the movement of the mover, the processing unit according to the embodiments of the present disclosure controls the movement of the mover according to the two capacitance values of the first capacitance value and the second capacitance value, which can improve the capacitance signal sensitivity.
[0028] The embodiments of the present disclosure will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present disclosure, many technical details are presented in order to enable the reader to better understand the present disclosure. However, the technical solutions claimed by the present disclosure can be implemented even without these technical details and various changes and modifications based on the following embodiments.
[0029] Figure 1 An exploded view of the focus motor provided by the embodiments of the present disclosure, Figure 2 A structural schematic view of the focus motor provided by the embodiments of the present disclosure, Figure 3 A sectional view of the focus motor provided by the embodiments of the present disclosure. It should be noted that, in order to show the internal structure of the focus motor, Figure 2 The housing of the focus motor is not shown in the middle.
[0030] In combination with reference Figures 1 to 3 The focus motor 100 comprises a stator 101, a mover 102, a sensing assembly 103, and a processing unit (not shown), the mover 102 is configured to be connected with a lens, the sensing assembly 103 comprises a first stator pole plate 113, a second stator pole plate 123, and a mover pole plate 133, the first stator pole plate 113 and the second stator pole plate 123 are fixedly connected with the stator 101, the mover pole plate 133 is fixedly connected with the mover 102, the first stator pole plate 113 and the second stator pole plate 123 are oppositely arranged, and the mover pole plate 133 is arranged between the first stator pole plate 113 and the second stator pole plate 123, the mover pole plate 133 and the first stator pole plate 113 have a first facing area, and the mover pole plate 133 and the second stator pole plate 123 have a second facing area, wherein the first stator pole plate 113 and the mover pole plate 133 form a first capacitor, the second stator pole plate 123 and the mover pole plate 133 form a second capacitor, and the mover 102 moves to make the first facing area and the second facing area decrease simultaneously or increase simultaneously; the processing unit is connected with the first stator pole plate 113 and the second stator pole plate 123, and the processing unit is also connected with the mover pole plate 133, and the processing unit controls the mover 102 to move in a focusing direction X of the lens based on a first capacitor value of the first capacitor and a second capacitor value of the second capacitor.
[0031] The stator 101 is a fixed part in the focus motor 100, and the mover 102 is a movable part in the focus motor 100, and the mover 102 is configured to be connected with the lens, so that the lens can move along the focusing direction X of the lens.
[0032] Figure 4 A partial structural schematic view of the focus motor provided by the embodiments of the present disclosure.
[0033] In combination with reference Figure 1 And Figure 4In some embodiments, the stator 101 has four sides 111, and two adjacent sides 111 are perpendicular to each other; the focusing motor 100 further comprises four magnets 104 and coils 105, the magnets 104 correspond to the sides 111 one by one, and the center of the magnet 104 coincides with the center of the side 111 corresponding to the magnet 104; the coils 105 are arranged on the mover 102 and are also located inside the magnets 104.
[0034] The coils 105 and the magnets 104 are used to generate electromagnetic force to drive the mover 102 to move.
[0035] The magnets 104 correspond to the sides 111 one by one, and the center of the magnet 104 coincides with the center of the side 111 corresponding to the magnet 104, that is, the magnets 104 are uniformly arranged on the stator 101, which helps to generate a uniform magnetic field, and when the coils 105 on the mover 102 move in the uniform magnetic field, it can move more smoothly along the predetermined focusing direction X, which helps to reduce the jitter and error in the focusing process and improve the focusing accuracy.
[0036] In some embodiments, continuing to refer to Figures 1 to 4 The focusing motor 100 comprises a plurality of sensing assemblies 103; the magnets 104 and the sensing assemblies 103 are arranged around the circumference of the lens, and a sensing assembly 103 is located in the corner area between adjacent magnets 104. The focusing motor comprises a plurality of sensing assemblies 103, that is, two or more sensing assemblies 103, when the mover 102 moves, the processing unit can perceive more capacitance signals, so as to improve the capacitance signal sensitivity of the focusing motor. The sensing assembly 103 is arranged in the corner area, which can better utilize the internal space of the focusing motor 100, and is conducive to reducing the volume of the focusing motor 100. In addition, in the related art, the sensing assembly in part of the focusing motor is arranged on the side of the stator, not in the corner area, resulting in a smaller magnet placement space, so that at most three magnets are placed in the focusing motor and located on the other three sides of the stator; moreover, since the lens moves relying on the electromagnetic force of the magnet and the coil, a smaller number of magnets will cause the problem of insufficient driving force of the focusing motor to drive the lens, and thus it is difficult for the three magnets in the focusing motor to generate a uniform magnetic field, which makes the stability of the focusing motor to drive the lens to move worse. In contrast, the focusing motor 100 in the embodiment of the present disclosure arranges four magnets 104, and the magnets 104 correspond to the four sides 111 of the stator 101 one by one, and the sensing assembly 103 is arranged in the corner area, so that the internal space of the focusing motor 100 can be more efficiently utilized, and the number of magnets 104 is 4, which is a larger number of magnets, and can provide sufficient driving force for the focusing motor 100 to drive the lens, and further, the center of the magnet 104 coincides with the center of the side 111 corresponding to the magnet 104, that is, the four magnets 104 can be uniformly distributed on the stator 101, which is conducive to generating a uniform magnetic field, so as to improve the stability of the focusing motor 100 to drive the lens to move.
[0037] With reference to the foregoing Figure 1 and Figure 3 The sensing assembly 103 comprises a first stator pole plate 113, a second stator pole plate 123 and a mover pole plate 133.
[0038] The first stator pole plate 113 is configured to form a first capacitor with the mover pole plate 133, and the second stator pole plate 123 is configured to form a second capacitor with the mover pole plate 133. Specifically, the first capacitor and the second capacitor are connected in parallel, and according to the summation formula of the parallel capacitors, the capacitance of the sensing assembly 103 formed by the first capacitor and the second capacitor is the sum of the first capacitance and the second capacitance.
[0039] Figure 5 A structural schematic diagram of the first stator pole plate and the second stator pole plate provided by the embodiment of the present disclosure.
[0040] With reference to the foregoing Figure 1 and Figure 5 In some embodiments, the first stator pole plate 113, the second stator pole plate 123 and the stator 101 are integrally formed. In this way, the structural stability of the first stator pole plate 113, the second stator pole plate 123 and the stator 101 can be improved, and the assembly of the focusing motor 100 can be more convenient.
[0041] Specifically, the first stator pole plate 113 and the second stator pole plate 123 are provided with a connecting piece 143, the first stator pole plate 113 and the second stator pole plate 123 are connected through the connecting piece 143, and the first stator pole plate 113, the connecting piece 143 and the second stator pole plate 123 are integrally formed metal structures. The stator 101 comprises a main body part 121 and a connecting part 131, and the connecting part 131 is configured to connect the first stator pole plate 113, the connecting piece 143 and the second stator pole plate 123 to form an integrally formed metal structure.
[0042] It can be understood that Figure 1 and Figure 5 In order to show the metal structure formed by the first stator pole plate 113, the connecting piece 143 and the second stator pole plate 123, the stator 101 is divided into the main body part 121 and the connecting part 131. In fact, the main body part 121, the connecting part 131 and the metal structure are integrally formed structures, and the main body part 121 and the connecting part 131 cannot be separated. In one specific example, the metal structure can be injection molded in the stator 101, so that the stator 101 and the metal structure are structures with excellent connection stability.
[0043] With reference to the foregoing Figure 1 , Figure 3 and Figure 5In some embodiments, the first stator pole plate 113 and the second stator pole plate 123 form a U-shaped slot in communication, and the mover pole plate 133 is located in the U-shaped slot and is movable along the focusing direction X of the lens. In this way, the first facing area between the first stator pole plate 113 and the mover pole plate 133 is equal to the second facing area between the second stator pole plate 123 and the mover pole plate 133.
[0044] In some embodiments, the distance between the mover pole plate 133 and the first stator pole plate 113 can be equal to the distance between the mover pole plate 133 and the second stator pole plate 123.
[0045] The formula for calculating the capacitance is: C = εS / 4πkd, where ε is the dielectric constant of the medium, k is the electrostatic force constant, S is the facing area of the two plates, and d is the vertical distance between the two plates. According to the formula for calculating the capacitance, the first capacitance value is positively related to the ratio of the first facing area and the distance between the first stator pole plate 113 and the mover pole plate 133, and the second capacitance value is positively related to the ratio of the second facing area and the distance between the second stator pole plate 123 and the mover pole plate 133. In the embodiments of the present disclosure, the first facing area is equal to the second facing area, and the distance between the mover pole plate 133 and the first stator pole plate 113 is equal to the distance between the mover pole plate 133 and the second stator pole plate 123. Therefore, the first capacitance value can be equal to the second capacitance value, which can work more effectively and reduce electromagnetic interference and noise.
[0046] In some embodiments, the distance between the mover pole plate 133 and the first stator pole plate 113 can not be equal to the distance between the mover pole plate 133 and the second stator pole plate 123.
[0047] In some embodiments, the mover pole plate 133 and the mover 102 are integrally formed. In this way, the structural stability of the mover pole plate 133 and the mover 102 can be improved, and the assembly of the focusing motor 100 can be more convenient. In a specific example, the mover pole plate 133 can be injection molded in the mover 102.
[0048] The processing unit controls the movement of the mover 102 in the focusing direction X of the lens based on the first capacitance value of the first capacitor and the second capacitance value of the second capacitor. Specifically, when the processing unit controls the movement of the mover 102 in the focusing direction X, the mover plate 133 provided on the mover 102 is moved in the focusing direction X, while the positions of the first stator plate 113 and the second stator plate 123 do not change. During the movement of the mover 102, the first facing area and the second facing area decrease or increase simultaneously, so that the first capacitance value and the second capacitance value change simultaneously. The position of the mover 102 in the focusing direction X can be obtained according to the first capacitance value and the second capacitance value. The distance between the mover 102 and the target position can be determined according to the position of the mover 102. The mover 102 is controlled to move to the target position in the focusing direction X, so that the lens reaches the target position and the focusing of the focusing motor 100 is realized.
[0049] Figure 6 and Figure 7 Two partial structure diagrams of the focusing motor provided by the embodiments of the present disclosure are shown. Among them, Figure 6 used to show the first stator plate, the second stator plate, the first elastic sheet and the first metal suspension wire in the focusing motor, Figure 7 used to show the first elastic sheet, the mover plate and the first metal suspension wire in the focusing motor.
[0050] In combination with reference Figure 1 , Figure 3 , Figure 6 and Figure 7 In some embodiments, the focusing motor 100 further includes a first metal elastic sheet 106, a first metal suspension wire 107, a second metal suspension wire 117 and a flexible circuit board 127. The first metal elastic sheet 106 includes a first elastic sheet 116 and a second elastic sheet 126. The first elastic sheet 116 is connected with the mover plate 133, and the first stator plate 113 and the second stator plate 123 are both connected with the second elastic sheet 126. The first metal suspension wire 107 is electrically connected with the first elastic sheet 116. The second metal suspension wire 117 is electrically connected with the second elastic sheet 126. The first metal suspension wire 107 and the second metal suspension wire 117 are electrically connected with the flexible circuit board 127.
[0051] The mover plate 133 is electrically connected with the flexible circuit board 127 through the first elastic sheet 116 and the first metal suspension wire 107. The first stator plate 113 and the second stator plate 123 are electrically connected with the flexible circuit board 127 through the second elastic sheet 126 and the second metal suspension wire 117.
[0052] In some embodiments, the focusing motor 100 further comprises a base 108, the flexible circuit board 127 is disposed on the base 108; a housing 118, the housing 118 is connected with the base 108 to form a containing cavity (not labeled) which contains at least the stator 101.
[0053] The base 108 is used to provide support force for the flexible circuit board 127.
[0054] The housing 118 is used to be connected with the base 108 to form a containing cavity which contains at least the stator 101, for protecting the internal structure of the focusing motor 100.
[0055] It should be noted that, Figure 6 and Figure 7 Although the first metal suspension wire 107 and the second metal suspension wire 117 in the first metal suspension wire 107 and the second metal suspension wire 117 are not directly in contact with the flexible circuit board 127 to achieve electrical connection, in fact, Figure 6 and Figure 7 The first metal suspension wire 107 and the second metal suspension wire 117 in the first metal suspension wire 107 and the second metal suspension wire 117 can be electrically connected with the flexible circuit board 127 through a conductive area (not shown) in the base 108.
[0056] Continuing to refer to Figure 1 , Figure 3 , Figure 6 and Figure 7 In some embodiments, the focusing motor 100 further comprises a second metal spring 109, the first metal spring 106 and the second metal spring 109 are located at opposite ends of the mover 102 along the lens focusing direction X, and the main function of the first metal spring 106 and the second metal spring 109 is to provide elastic force. During the focusing process, when the mover 102 pushes the lens to move, the first metal spring 106 and the second metal spring 109 can elastically support the lens, so that the lens can move smoothly within a certain range, and can help the lens return to the initial position or the balance position after stopping driving, to ensure the accuracy and stability of the focusing.
[0057] In the above-mentioned focusing motor 100 scheme, compared with the scheme in the related art which uses a Hall sensor device as a sensing component, the first stator pole plate 113, the second stator pole plate 123 and the mover pole plate 133 as the sensing component 103 are used in the embodiment of the disclosure, and the cost and the occupied space of the capacitor pole plate are smaller than those of the Hall sensor, so that the cost and the volume of the focusing motor 100 in the embodiment of the disclosure can be smaller. In addition, compared with the scheme in which the capacitance value of a capacitor composed of one stator pole plate and one mover pole plate is used to control the movement of the mover, the embodiment of the disclosure can improve the sensitivity of the capacitor signal by controlling the movement of the mover 102 according to the first capacitance value and the second capacitance value.
[0058] Correspondingly, another embodiment of the present disclosure also provides a camera device comprising the focusing motor of any of the above embodiments. For the same or corresponding parts of the previous embodiment, please refer to the corresponding description of the previous embodiment, which will not be described in detail below.
[0059] The camera device comprises a lens and a focusing motor for driving the lens, and the lens is arranged on a mover of the focusing motor.
[0060] The camera device is an electronic device with a camera function, such as a camera, a camcorder, a monitor, etc.
[0061] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present disclosure. Any person skilled in the art can make various modifications and changes without departing from the spirit and scope of the present disclosure, and therefore the protection scope of the present disclosure should be limited by the scope defined in the claims.
Claims
1. A focusing motor for driving a lens, characterized in that, a stator; a mover for connecting with the lens; a sensing assembly comprising a first stator plate, a second stator plate and a mover plate, the first stator plate and the second stator plate are fixedly connected with the stator, the mover plate is fixedly connected with the mover, the first stator plate and the second stator plate are oppositely arranged, and the mover plate is arranged between the first stator plate and the second stator plate, the mover plate and the first stator plate have a first facing area, and the mover plate and the second stator plate have a second facing area, wherein the first stator plate and the mover plate form a first capacitor, the second stator plate and the mover plate form a second capacitor, and the mover moves to simultaneously reduce or increase the first facing area and the second facing area; a processing unit connected with the first stator plate and the second stator plate, and also connected with the mover plate, the processing unit controls the mover to move in a focusing direction of the lens based on a first capacitor value of the first capacitor and a second capacitor value of the second capacitor.
2. The focus motor according to claim 1, wherein The first stator plate, the second stator plate and the stator are integrally formed.
3. The focus motor according to claim 2, wherein The first stator plate and the second stator plate are connected to form a U-shaped groove, and the mover plate is located in the U-shaped groove and is movable along the focusing direction of the lens.
4. The focus motor according to claim 1, wherein The distance between the mover plate and the first stator plate is equal to the distance between the mover plate and the second stator plate.
5. The focus motor of claim 1, wherein The mover plate and the mover are integrally formed.
6. The focus motor of claim 1, wherein The stator has four sides, and adjacent two sides are perpendicular to each other; The focusing motor further comprises: four magnets corresponding to the four sides respectively, and the center of each magnet coincides with the center of the corresponding side; a coil arranged on the mover and located inside the magnets.
7. The focus motor according to claim 6, wherein The focusing motor comprises a plurality of sensing assemblies, and the magnets and the sensing assemblies are arranged around the circumference of the lens, and one sensing assembly is located in the corner area between adjacent magnets.
8. The focus motor of claim 6, wherein, The focusing motor further comprises: a first metal spring plate comprising a first spring plate and a second spring plate, the first spring plate is connected with the mover plate, and the first stator plate and the second stator plate are connected with the second spring plate; a first metal suspension wire electrically connected with the first spring plate; a second metal suspension wire electrically connected with the second spring plate; a flexible circuit board, the first metal suspension wire and the second metal suspension wire are electrically connected with the flexible circuit board.
9. The focus motor according to claim 8, wherein The focusing motor further comprises: a base, the flexible circuit board is arranged on the base; a shell connected with the base to form a containing cavity, the containing cavity contains at least the stator.
10. An image pickup apparatus characterized by comprising: It comprises: A lens, a focus motor as claimed in any of claims 1 to 9 for driving the lens, the lens being arranged on the mover of the focus motor.