CN115297233A - Motor and electronic apparatus - Google Patents
Motor and electronic apparatus Download PDFInfo
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- CN115297233A CN115297233A CN202210824083.0A CN202210824083A CN115297233A CN 115297233 A CN115297233 A CN 115297233A CN 202210824083 A CN202210824083 A CN 202210824083A CN 115297233 A CN115297233 A CN 115297233A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/06—Linear motors
- H02P25/064—Linear motors of the synchronous type
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- Microelectronics & Electronic Packaging (AREA)
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The application discloses motor and electronic equipment belongs to the electronic equipment field. The motor comprises a stator assembly, a rotor assembly, an elastic connecting assembly and a detection circuit, wherein the elastic connecting assembly comprises a stator connecting seat, a rotor connecting seat and a piezoelectric connecting piece; the stator assembly can drive the rotor assembly to move relative to the stator assembly and drive the piezoelectric connecting piece to deform; the piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, and the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can obtain the deformation quantity of the piezoelectric piece through the detection piece.
Description
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a motor and electronic equipment.
Background
With the rapid development of electronic devices, users have higher and higher requirements for the functions of the electronic devices. At present, in order to improve the focusing performance of a lens, a camera motor is generally provided in an electronic apparatus.
The existing camera motor generally comprises a base, a shell fixed on the base and a carrier arranged in the shell, wherein the carrier is used for fixing and mounting a lens; the carrier is usually provided with a coil, and the shell is provided with a magnet at a position corresponding to the coil; the coil can generate a force repelling or attracting the magnet under the condition of electrifying, so that the carrier drives the lens to move relative to the shell, and the focusing function of the lens is completed.
However, the lens needs to find the clearest point to be focused during the focusing process, so that the time required for the lens to be focused is long, and the user experience is poor.
Content of application
The embodiment of the application aims to provide a motor and electronic equipment, and the problem that in the prior art, the user experience is poor due to the fact that a long time is needed in the focusing process of a lens can be solved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, embodiments of the present application provide a motor, which includes a stator assembly, a mover assembly, an elastic connection assembly, and a detection circuit,
the elastic connecting assembly comprises a stator connecting seat, a rotor connecting seat and a piezoelectric connecting piece, the stator connecting seat is arranged on the stator assembly, the rotor connecting seat is arranged on the rotor assembly, the rotor connecting seat is elastically connected with the stator connecting seat, and the piezoelectric connecting piece is respectively connected with the stator connecting seat and the rotor connecting seat; the stator assembly can drive the rotor assembly to move relative to the stator assembly and drive the piezoelectric connecting piece to deform;
the piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, wherein the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can acquire the deformation quantity of the piezoelectric piece through the detection piece.
In a second aspect, embodiments of the present application provide an electronic device, including the above-described motor.
In this application embodiment, the piezoelectric connecting piece respectively with the stator connecting seat with the active cell connecting seat links to each other, the stator connecting seat set up in stator module, the active cell connecting seat set up in active cell subassembly, like this stator module drive the active cell subassembly is relative under the circumstances that stator module removed, can accomplish focusing to the camera lens, and can drive piezoelectric connecting piece deformation. The piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, and the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can obtain the deformation quantity of the piezoelectric piece through the detection piece, and further the position information of the lens is judged. In the embodiment of the application, the detection circuit can feed back the position of the lens in real time under the condition that the motor works, closed-loop control is formed, the lens can be conveniently and accurately moved to the clearly focused position according to the position information of the lens, the focusing time of the lens is shortened, and the user experience is improved.
Drawings
FIG. 1 is a schematic view of an exploded structure of a motor in an embodiment of the present application;
fig. 2 is a schematic cross-sectional view of a motor according to an embodiment of the present application;
FIG. 3 is a schematic view of a resilient connecting member in an embodiment of the present application;
fig. 4 is a schematic structural view of another piezoelectric element in the embodiment of the present application;
FIG. 5 is a schematic view of another embodiment of a resilient connecting member in accordance with the present disclosure;
fig. 6 is a vibration graph of a lens in the embodiment of the present application.
Description of the reference numerals:
1-elastic connecting assembly, 11-stator connecting assembly, 12-rotor connecting assembly, 13-piezoelectric connecting assembly, 131-detecting element, 1311-first conducting layer, 1312-second conducting layer, 132-piezoelectric element, 14-elastic connecting element, 2-stator assembly, 21-shell, 22-base, 3-rotor assembly, 41-first magnetic element, 42-second magnetic element, 6-electric signal connecting element, 8-gasket, 81-first gasket, 82-second gasket and 9-elastic element.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.
The motor and the electronic device provided by the embodiments of the present application are described in detail below with reference to fig. 1 to 6 through specific embodiments and application scenarios thereof.
As shown in fig. 1, the motor in the embodiment of the present application may specifically include a stator assembly 2, a mover assembly 3, an elastic connection assembly 1, and a detection circuit, where the elastic connection assembly 1 includes a stator connection seat 11, a mover connection seat 12, and a piezoelectric connection element 13, the stator connection seat 11 is disposed on the stator assembly 2, the mover connection seat 12 is disposed on the mover assembly 3, the mover connection seat 12 is elastically connected to the stator connection seat 11, and the piezoelectric connection element 13 is respectively connected to the stator connection seat 11 and the mover connection seat 12; the stator assembly 2 can drive the rotor assembly 3 to move relative to the stator assembly 2 and drive the piezoelectric connecting piece 13 to deform; the piezoelectric connecting member 13 includes a detecting member 131 and a piezoelectric member 132, and the detecting member 131 is connected to a detecting circuit and the piezoelectric member 132, respectively, so that the detecting circuit obtains the deformation amount of the piezoelectric member 132 through the detecting member 131.
In this application embodiment, piezoelectric connecting piece 13 links to each other with stator connecting seat 11 and active cell connecting seat 12 respectively, and stator module 2 is located to stator connecting seat 11, and active cell connecting seat 12 sets up in active cell subassembly 3, like this, under the relative stator module 2 condition of removing of stator module 2 drive active cell subassembly 3, can accomplish focusing to the camera lens, and can drive piezoelectric connecting piece 13 deformation. The piezoelectric connecting element 13 includes a detecting element 131 and a piezoelectric element 132, and since the detecting element 131 is connected to the detecting circuit and the piezoelectric element 132 respectively, the detecting circuit can obtain the deformation amount of the piezoelectric element 132 through the detecting element 131, and then determine the position information of the lens. In the embodiment of the application, the detection circuit can feed back the position of the lens in real time under the condition that the motor works to form closed-loop control, so that the lens can be rapidly and accurately moved to a clearly focused position according to the position information of the lens, the focusing time of the lens is shortened, and the user experience is improved.
The stator assembly 2 described in the embodiment of the present application may include a housing 21 and a base 22, and the housing 21 and the base 22 may be fixedly connected to form a cavity for protecting the mover assembly 3 and the lens, and specifically, in order to effectively ensure the structural stability of the motor, the housing 21 may be set as a metal structural member.
Specifically, a light hole may be further disposed on the base 22 at a position opposite to the carrier, so as to facilitate imaging of light collected by the transmission lens, where the light hole may be a through hole or a transparent area disposed on the base 22, and may be particularly disposed according to actual requirements, which is not specifically limited in this embodiment of the application.
The mover assembly 3 described in the embodiment of the present application may include a lens and a carrier for mounting the lens. The carrier may be provided with a mounting groove for embedding the lens, and the mounting groove may be a half-through groove or a full-through groove, and may be specifically set according to actual requirements, which is not specifically limited in the embodiment of the present application.
Specifically, the elastic connection assemblies 1 may be connected to the stator assembly 2 and the mover assembly 3 respectively, so as to be used for connecting the stator assembly 2 and the mover assembly 3, the number of the elastic connection assemblies 1 may be one, two, or more, and the like, and may be specifically set according to actual requirements, which is not specifically limited in this embodiment of the present application.
For example, one elastic connection assembly 1 may be disposed at the top or bottom of the mover connection assembly to fix one end of the mover assembly 3 to the stator assembly 2; alternatively, two elastic connection assemblies 1 may be respectively disposed at the top and the bottom of the mover assembly 3 to respectively fix two ends of the mover assembly 3 to the stator assembly 2, and other cases may be referred to.
Specifically, as shown in fig. 2, in a case that one end of the mover assembly 3 is fixed to the stator assembly 2 by using one elastic connection assembly 1, the other end of the mover assembly 3 may also be fixed to the stator assembly 2 by using an elastic member 9, where the elastic member 9 may be a spring, an elastic sheet, or the like, and may be specifically set according to actual requirements, which is not specifically limited in this embodiment of the application.
Specifically, the stator assembly 2 may include a second magnetic member 42, the mover assembly 3 correspondingly includes a first magnetic member 41, and the second magnetic member 42 may drive the mover assembly 3 to move relative to the stator assembly 2 by applying an attractive force or a repulsive force to the first magnetic member 41.
For example: the first magnetic member 41 is a magnet, and the second magnetic member 42 is a coil; alternatively, the first magnetic member 41 may be a coil, and the second magnetic member 42 may be a magnet or the like.
Specifically, a circuit board may be disposed on the base 22, and the circuit board may be electrically connected to the first magnetic member 41 and used for supplying power to the first magnetic member 41, so that the first magnetic member 41 drives the mover assembly 3 to move relative to the stator assembly 2 through the second magnetic member 42.
In particular, the detection circuit may be provided to the circuit board.
The elastic connection assembly 1 described in the embodiment of the present application includes a stator connection seat 11, a mover connection seat 12, and a piezoelectric connection member 13.
Specifically, because stator connecting seat 11 sets up in stator module 2, active cell connecting seat 12 sets up in active cell subassembly 3, and elastic connection between stator connecting seat 11 and the active cell connecting seat 12, the relative stator module 2 of stator module 2 drive active cell subassembly 3 of being convenient for removes, realizes focusing to the camera lens.
Further, piezoelectric connecting piece 13 is connected with stator connecting seat 11 and active cell connecting seat 12 respectively, thus, at the in-process that stator module 2 drive active cell subassembly 3 removed relative stator module 2, active cell connecting seat 12 can remove relative stator connecting seat 11, and then can drive piezoelectric connecting piece 13 deformation, because active cell subassembly 3 can include the camera lens, and thus, the displacement volume of camera lens can be obtained to the deformation volume through analysis piezoelectric connecting piece 13, reach the purpose of real time monitoring camera lens's positional information, and then can adjust the camera lens to the clear position of focusing fast, shorten the time that the camera lens was focused, improve user's experience and feel.
Specifically, the piezoelectric connecting member 13 may include a detecting member 131 and a piezoelectric member 132, and the piezoelectric member 132 may be a structure made of a piezoelectric material to have piezoelectric properties. For example: the piezoelectric connecting piece 13 can deform under the condition of physical pressure, and can convert mechanical energy into electric energy under the condition of deformation; the piezo-electric connector 13 may also be deformable upon receiving an electrical signal.
Specifically, the piezoelectric material may include: the piezoelectric material may be selected according to actual requirements, and this is not specifically limited in this embodiment of the present application.
Specifically, the piezoelectric element 132 may be a sheet structure or a rod structure, and may be specifically configured according to actual needs, which is not specifically limited in this embodiment of the present application.
Specifically, the detecting element 131 is connected to the piezoelectric element 132 and the detecting circuit, and the detecting element 131 may be an electrode, such as a copper electrode, a silver electrode, a tin electrode, etc., so that the detecting circuit can obtain an electrical signal of the piezoelectric element 132 through the detecting element 131, and further obtain a deformation amount of the piezoelectric element 132.
Specifically, due to the positive piezoelectric effect, in the case where the piezoelectric element 132 is deformed, a potential difference may be generated on opposite sides of the piezoelectric element 132. The detecting members 131 may be respectively connected to two opposite sides of the elastic connection assembly 1, so that the detecting circuit may obtain the potential difference through the detecting members 131, and the deformation amount of the piezoelectric member 132 is obtained through analysis of the potential difference.
Specifically, the direct piezoelectric effect may be a process of converting mechanical energy into electrical energy. When a physical pressure is applied to the piezoelectric element 132, the electric dipole in the piezoelectric element 132 is shortened due to compression, and the piezoelectric element 132 generates equal positive and negative charges on its surface to maintain its original shape in order to resist the change, and this phenomenon of electric polarization due to deformation is called "positive voltage effect".
Optionally, the detecting element 131 includes a first conductive layer 1311 and a second conductive layer 1312 stacked on each other, the first conductive layer 1311 and the second conductive layer 1312 are respectively disposed on two opposite sides of the piezoelectric element 132, and the piezoelectric element 132 is electrically connected to the first conductive layer 1311 and the second conductive layer 1312 respectively; the detection circuit is electrically connected to the first conductive layer 1311 and the second conductive layer 1312, respectively, and acquires the amount of deformation of the piezoelectric element 132 by a potential difference between the first conductive layer 1311 and the second conductive layer 1312 during deformation of the piezoelectric connector 13.
In the embodiment of the present application, the detection circuit is connected to the first conductive layer 1311 and the second conductive layer 1312, and the first conductive layer 1311 and the second conductive layer 1312 are respectively disposed on two opposite sides of the piezoelectric element 132, so that the first conductive layer 1311 and the second conductive layer 1312 can respectively collect positive and negative charges generated by the piezoelectric element 132 when the piezoelectric connector 13 is deformed. The detection circuit is electrically connected to the first conductive layer 1311 and the second conductive layer 1312, so that a potential difference between the first conductive layer 1311 and the second conductive layer 1312 can be obtained, and then a deformation amount of the piezoelectric element 132 can be obtained according to the potential difference, which is relatively simple to implement.
Specifically, the first conductive layer 1311 and the second conductive layer 1312 may be electrodes with opposite polarities, the first conductive layer 1311 may be a metal electrode such as a copper electrode, a silver electrode, or a nickel electrode, and the second conductive layer 1312 may be a metal electrode such as a copper electrode, a silver electrode, or a nickel electrode, which may be specifically set according to actual needs, and this is not specifically limited in this embodiment of the application.
Specifically, as shown in fig. 4, a first conductive layer 1311 and a second conductive layer 1312 are respectively disposed on upper and lower surfaces of piezoelectric element 132, and when mover assembly 3 drives the lens to move relative to stator assembly 2, mover assembly 3 drives mover connecting base 12 to move relative to stator connecting base 11, and piezoelectric element 132 deforms and converts mechanical energy into electrical energy, so that electric charges can be respectively transferred onto first conductive layer 1311 and second conductive layer 1312, and a potential difference is generated between first conductive layer 1311 and second conductive layer 1312. The detection circuit can detect the potential difference between the first conductive layer 1311 and the second conductive layer 1312, and then calculate the deformation amount of the piezoelectric connector 13 according to the potential difference, so that the actual position of the lens is judged, closed-loop control is formed, the focusing speed is increased, and the user experience is improved.
Specifically, the first conductive layer 1311 and the second conductive layer 1312 may be fixed to opposite sides of the piezoelectric element 132 by conductive adhesives, respectively, so that the piezoelectric connector 13 forms an integral structure, and the first conductive layer 1311 and the second conductive layer 1312 may be electrically connected to the piezoelectric element 132, respectively.
Specifically, the thicknesses of the first conductive layer 1311, the second conductive layer 1312 and the piezoelectric element 132 may be set according to actual requirements, which is not specifically limited in this embodiment of the application.
In an alternative embodiment of the present application, the piezoelectric element 132 is a sheet structure having elasticity, one end of the piezoelectric element 132 is connected to the stator connecting seat 11, the other end of the piezoelectric element 132 is connected to the mover connecting seat 12, and the mover connecting seat 12 is elastically connected to the stator connecting seat 11 through the piezoelectric element 132.
In this embodiment, one end of the piezoelectric element 132 is connected to the stator connecting seat 11, and the other end is connected to the rotor connecting seat 12, and since the piezoelectric element 132 is of an elastic sheet structure, the stator connecting seat 11 and the rotor connecting seat 12 are elastically connected through the piezoelectric element 132, so that the implementation manner is simple, and the structure of the motor can be simplified.
Specifically, the piezoelectric element 132 may be a structure prepared by combining an elastic material and a piezoelectric material, that is, having both elastic and piezoelectric properties.
In another optional embodiment of the present application, the elastic connection assembly 1 further includes an elastic connection element 14, one end of the elastic connection element 14 is connected to the stator connection seat 11, the other end of the elastic connection element 14 is connected to the rotor connection seat 12, and the rotor connection seat 12 and the stator connection seat 11 are elastically connected through the elastic connection element 14.
In this application embodiment, elastic connection assembly 1's one end and stator connecting seat 11 are connected, and the other end and active cell connecting seat 12 are convenient for through 14 elastic connection of elastic connection spare between active cell connecting seat 12 and the stator connecting seat 11, can improve elastic connection's reliability between active cell connecting seat 12 and the stator connection.
Specifically, the elastic connecting member 14 may be a spring or a spring plate, and may specifically include a curved spring wire, and the spring coefficient of the elastic connecting member 14 may be arbitrarily adjusted by designing the shape of the spring wire. The shape of the spring wire can be a conventional shape or an irregular shape, and can be set according to the requirement of actually meeting the reliability stress.
Specifically, the number of the elastic connection members 14 may be one, two, or more, and the like, as shown in fig. 3, which illustrates a case of four elastic connection members 14, and the four elastic connection members 14 are symmetrically arranged at four corners of the elastic connection assembly 1, and other cases may be referred to, which is not specifically limited in this embodiment of the present application.
Alternatively, as shown in fig. 5, the stator coupling seat 11 is sleeved outside the mover coupling seat 12, and the elastic connectors 14 and the piezoelectric connectors 13 are alternately disposed between the stator coupling seat 11 and the mover coupling seat 12.
In this embodiment, elastic connection 14 and piezoelectric connection 13 are alternately arranged between stator connecting seat 11 and rotor connecting seat 12, so that elastic connection between stator connecting seat 11 and rotor connecting seat 12 can be effectively ensured, and deformation of pressure electric connection piece 13 can be effectively ensured in the process that rotor connecting seat 12 moves relative to stator connecting seat 11.
For example, the elastic connectors 14 and the piezoelectric connectors 13 may be alternately arranged along a first direction, the elastic connectors 14 or the piezoelectric connectors 13 located at an end of the first direction and close to the stator connection seats 11 are connected to the stator connection seats 11, and the elastic connectors 14 or the piezoelectric connectors 13 located at an end of the first direction and close to the mover connection seats 12 are connected to the mover connection seats 12, wherein the first direction may be a direction from the stator connection seats 11 to the mover connection seats 12.
Or, the elastic connection members 14 and the piezoelectric connection members 13 may be alternately arranged along a second direction, two ends of the elastic connection members 14 along the first direction are respectively connected with the stator connection seats 11 and the rotor connection seats 12, two ends of the piezoelectric connection members 13 along the first direction are respectively connected with the stator connection seats 11 and the rotor connection seats 12, and the second direction may be perpendicular to the first direction.
Alternatively, the elastic connection member 14 is an elastic reed, and the piezoelectric connection member 13 is an elastic reed provided with the piezoelectric element 132.
In the embodiment of the present application, the elastic connection element 14 is an elastic reed, which can further improve the reliability of the elastic connection between the stator connection seat 11 and the mover connection seat 12 through the elastic connection element 14. The piezoelectric connector 13 is an elastic reed provided with a piezoelectric element 132, so that the reliability of elastic connection between the stator connecting seat 11 and the mover connecting seat 12 through the piezoelectric element 132 can be further improved.
Optionally, the motor further includes a driving circuit, the driving circuit is disposed on the stator assembly 2, the mover assembly 3 includes a driving coil, and the piezoelectric connector 13 is a conductive connector; the driving coil is connected with a driving circuit through a piezoelectric connecting piece 13, and the driving circuit is used for supplying power to the driving coil; under the condition that the drive coil is electrified to generate a magnetic field, the drive coil drives the rotor assembly 3 to move relative to the stator assembly 2 and drives the piezoelectric connector 13 to deform.
In the embodiment of the present application, the driving circuit may supply power to the driving coil so that the driving coil drives the mover assembly 3 to move relative to the stator assembly 2.
Optionally, the motor further includes a control circuit, and the control circuit suppresses the vibration of the elastic connection assembly 1 when the detection circuit obtains the displacement of the mover assembly 3 according to the deformation amount of the piezoelectric element 132 to determine that the mover assembly 3 is in the vibration state.
In this application embodiment, the detection circuit can acquire the displacement of mover assembly 3 according to the deformation amount of piezoelectric element 132, and when the detection circuit judges that mover assembly 3 is in the vibration state according to the displacement, the control circuit can suppress the vibration of elastic connection assembly 1, and then suppress the vibration of mover assembly 3, and can greatly shorten the stabilization time of the lens, or even completely eliminate the stabilization time of the lens, thereby effectively protecting the safety of the lens.
Specifically, the detection circuit may acquire the deformation amount of the piezoelectric element 132 through the detection element 131, and in the case that the deformation amount of the piezoelectric element 132 exceeds a first preset threshold, it may be determined that the mover assembly 3 is in the vibration state.
Alternatively, the detection circuit may also calculate the displacement of the mover assembly 3 through the deformation amount of the piezoelectric element 132, and in the case that the displacement exceeds a second preset threshold, it may be determined that the mover assembly 3 is in the vibration state.
Or, the detection circuit further obtains the deformation amount of the piezoelectric element 132 in real time to further obtain the vibration frequency of the piezoelectric element 132, and determines that the mover assembly 3 is in the vibration state when the vibration frequency is within a preset resonance range, where the resonance frequency of the elastic connection assembly 1 and the mover assembly 3 may be within the preset resonance range.
Specifically, the control circuit may be connected to the driving circuit, so as to directly suppress the vibration of the mover assembly 3 by controlling the magnitude and/or direction of the current loaded on the driving coil through the driving circuit.
Alternatively, the driving circuit may be electrically connected to the piezoelectric element 132 to supply power to the piezoelectric element 132, generate deformation by using the reverse voltage effect of the piezoelectric element 132, and then suppress the vibration of the piezoelectric connector 13, thereby indirectly suppressing the vibration of the mover assembly 3.
In yet another alternative embodiment of the present application, the motor further includes a control circuit, the detecting element 131 includes a first conductive layer 1311 and a second conductive layer 1312 stacked together, the first conductive layer 1311 and the second conductive layer 1312 are respectively disposed on two opposite sides of the piezoelectric element 132, and the piezoelectric element 132 is electrically connected to the first conductive layer 1311 and the second conductive layer 1312; the control circuit controls the voltages applied to the first conductive layer 1311 and the second conductive layer 1312, so that the piezoelectric element 132 is deformed by the electric field between the first conductive layer 1311 and the second conductive layer 1312, and the piezoelectric connecting element 13 is deformed in the direction opposite to the vibration direction by the deformation of the piezoelectric element 132 to suppress the vibration of the piezoelectric connecting element 13.
In this embodiment, the control circuit controls the voltage between the first conductive layer 1311 and the second conductive layer 1312, so that the piezoelectric element 132 can be deformed when being powered on, and the piezoelectric connecting element 13 can be deformed in a direction opposite to the vibration direction of the piezoelectric element to suppress the vibration of the piezoelectric element 132, thereby achieving the purpose of suppressing the vibration of the lens, shortening the stabilization time of the lens, and effectively protecting the safety of the lens.
Specifically, when a user focuses on the lens, under the condition that the second magnetic member 42 is powered on, a lorentn magnetic force can be generated between the second magnetic member 42 and the first magnetic member 41, so that the mover assembly 3 can drive the lens to move to a clearly focused position, and the lens easily oscillates in a sine wave manner, such as the S1 curve in fig. 6, which needs a period of time to be stabilized. Further, the control circuit may control the voltages applied to the first conductive layer 1311 and the second conductive layer 1312, so that the piezoelectric element 132 is deformed when being energized, and the piezoelectric connecting element 13 is deformed in a direction opposite to the vibration direction under the deformation of the piezoelectric element 132, so that the piezoelectric connecting element 13 may drive the lens on the mover assembly 3 to vibrate in a direction opposite to the lens oscillation direction through the mover connecting seat 12, as shown in the S2 curve in fig. 6, which may greatly shorten the stabilization time of the lens, or even completely eliminate the stabilization time of the lens. In addition, the lens can be prevented from generating a resonance phenomenon, and the safety of the lens can be effectively protected.
Specifically, the piezoelectric element 132 may be deformed by an inverse piezoelectric effect when energized. Because piezoelectricity connecting piece 13 is connected with stator connecting seat 11 and active cell connecting seat 12 respectively, can drive the relative stator module 2 of active cell subassembly 3 through active cell connecting seat 12 under the condition that piezoelectricity spare 132 produced deformation and remove, and then reach the purpose of restraining stator module 2 vibration, thereby can reverse offset the oscillation curve of camera lens, reduce the stabilization time of camera lens to zero, make the camera lens can accomplish with the fastest speed and focus, user experience has been improved greatly.
Specifically, the inverse piezoelectric effect may refer to that the piezoelectric element 132 may generate mechanical deformation or mechanical pressure in a certain direction under the condition that an applied electric field is applied to the polarization direction of the piezoelectric element 132; with the applied electric field removed, the mechanical deformation or pressure created by the piezoelectric element 132 is removed. The inverse piezoelectric effect is that the deformation of the piezoelectric element 132 is controlled by an electric field, and when the piezoelectric element 132 receives an electric signal, the piezoelectric element may extend or contract along the direction of the electric signal.
Optionally, the motor further comprises a spacer 8, the stator assembly 2 comprises a housing 21, and the spacer 8 is arranged between the elastic connection assembly 1 and the housing 21 to insulate the elastic connection assembly 14 from the housing 21; a conductive circuit electrically connected with the detection member 131 is arranged in the pad 8, the conductive circuit is electrically connected with the detection circuit, and the conductive circuit is used for transmitting an electric signal acquired by the detection member 131 to the detection circuit.
In the embodiment of the present application, the gasket 8 is disposed between the elastic connection assembly 1 and the housing 21, so as to avoid the conduction between the elastic connection member 14 and the housing 21, and prevent the short circuit phenomenon. Conductive circuits are arranged in the gasket 8 and are respectively electrically connected with the detection piece 131 and the detection circuit, so that the detection circuit can conveniently acquire electric signals through the detection piece 131, and further the deformation quantity of the piezoelectric connecting piece 13 is obtained.
Specifically, the gasket 8 may be a rubber gasket made of a rubber material, a plastic gasket made of a plastic material, or the like, the gasket 8 may be disposed on the top, the bottom, or the side of the elastic connection assembly 1, or the like, and may be specifically disposed according to actual requirements, which is not specifically limited in this embodiment of the present application.
Specifically, the gasket 8 and the housing 21 may be fixedly connected by an insulating adhesive, so as to avoid the circuit conduction. The gasket 8 and the elastic connecting component 1 can be fixedly connected through insulating glue. The conductive traces may be electrically connected to the detecting member 131 and the detecting circuit, respectively, and may conduct an electric circuit to conduct an electric signal acquired by the detecting member 131 to the detecting circuit.
In yet another alternative embodiment of the present application, the detecting element 131 includes a first conductive layer 1311 and a second conductive layer 1312 stacked on each other, the first conductive layer 1311 and the second conductive layer 1312 are respectively disposed on two opposite sides of the piezoelectric element 132, and the piezoelectric element 132 is electrically connected to the first conductive layer 1311 and the second conductive layer 1312; the motor comprises a first gasket 81 and a second gasket 82 which are overlapped at two sides of the elastic connecting component 1, wherein a first conductive circuit connected with the first conductive layer 1311 is arranged in the first gasket 81, and a second conductive circuit connected with the second conductive layer 1312 is arranged in the second gasket 82; the detection circuit acquires an electric signal acquired by the detecting member 131 through the first conductive wiring and/or the second conductive wiring.
In the embodiment of the present application, the first pad 81 and the second pad 82 are respectively disposed on two sides of the elastic connection assembly 1, so as to effectively block the short circuit of the elastic connection member 14. A first conductive trace is disposed in the first pad 81, and a second conductive trace is disposed in the second pad 82, so that the detection circuit is electrically connected to the first conductive layer 1311 through the first conductive trace and electrically connected to the second conductive layer 1312 through the second conductive trace, and thus an electrical signal between the first conductive layer 1311 and the second conductive layer 1312 is obtained, and a deformation amount of the piezoelectric element 132 is obtained.
Specifically, the second conductive trace may be grounded, and the detection circuit may be electrically connected to the first conductive trace to be electrically connected to the first conductive layer 1311 through the first conductive trace, so as to obtain an electrical signal generated by the deformation of the piezoelectric element 132.
Alternatively, the first conductive trace may be grounded, and the detection circuit may be electrically connected to the second conductive trace to be electrically connected to the second conductive trace 1312 through the second conductive trace, so as to obtain an electrical signal generated by the piezoelectric element 132 due to deformation.
Or, the detection circuit may be electrically connected to the first conductive trace and the second conductive trace, respectively, to achieve electrical connection with the first conductive layer 1311 and the second conductive layer 1312, respectively, and further obtain an electrical signal generated by the piezoelectric element 132 due to deformation.
Optionally, the control circuit may be electrically connected to the first conductive layer 1311 through the first conductive trace, so as to supply power to the piezoelectric element 132, so as to deform the piezoelectric element 132; the detection circuit may be electrically connected to the second conductive layer 1312 through the second conductive trace, so as to obtain an electrical signal generated by the deformation of the piezoelectric element 132.
Optionally, the motor further comprises a first electrical signal connector and a second electrical signal connector, one end of the first electrical signal connector is connected with the stator connecting seat 11 to electrically connect the first conductive layer 1311, and the other end of the first electrical signal connector is connected with the first pad 8 to electrically connect the first conductive line; one end of the second electrical signal connector is connected to the stator connecting seat 11 to electrically connect the second conductive layer 1312, and the other end of the second electrical signal connector is connected to the second pad 8 to electrically connect the second conductive trace.
In the embodiment of the present application, one end of the first electrical signal connector is electrically connected to the first conductive layer 1311 by being connected to the stator connection seat 11, and the other end of the first electrical signal connector is electrically connected to the first conductive trace by being connected to the first pad 8, so that the first conductive layer 1311 is electrically connected to the first conductive trace through the first electrical signal connector. One end of the second electrical signal connector is electrically connected to the second conductive layer 1312 by being connected to the stator connection holder 11, and the other end is connected to the second conductive trace by being connected to the second pad 8, so that the second conductive layer 1312 may be conducted to the second conductive trace through the second electrical signal connector.
Specifically, the first electrical signal connecting element may be a conductive pillar, a connecting line, a metal rod, or the like, and the second electrical signal connecting element may be a conductive pillar, a connecting line, a metal rod, or the like, which may be specifically set according to actual requirements, and this is not specifically limited in this embodiment of the present application.
Optionally, the stator connecting seat 11 is sleeved outside the rotor connecting seat 12, piezoelectric connection points are arranged on the stator connecting seat 11 and the rotor connecting seat 12, a multi-section separated piezoelectric connector 13 is arranged between the stator connecting seat 11 and the rotor connecting seat 12, and two ends of the piezoelectric connector 13 are respectively connected with the piezoelectric connection points on the stator connecting seat 11 and the piezoelectric connection points on the rotor connecting seat 12; the motor further comprises a plurality of electrical signal connectors 6, one end of each electrical signal connector 6 is connected with a piezoelectric connection point on the stator connection seat 11, the other end of each electrical signal connector 6 is electrically connected with the detection circuit, and the electrical signal connectors 6 are electrically connected with the corresponding first conductive layer 1311 and the corresponding second conductive layer 1312 in the piezoelectric connector 13 respectively so as to obtain the deformation amount of the piezoelectric element 132 in the piezoelectric connector 13.
In the embodiment of the present application, the first conductive layer 1311 may be electrically connected to the detection circuit through the electrical signal connector 6, and the second conductive layer 1312 may be electrically connected to the detection circuit through the electrical signal connector 6, so that the detection circuit is electrically connected to the first conductive layer 1311 and the second conductive layer 1312, respectively, to obtain an electrical signal between the first conductive layer 1311 and the second conductive layer 1312, and further obtain a deformation amount of the piezoelectric connector 13.
Specifically, as shown in fig. 3 and 5, the stator connecting seat 11 is sleeved outside the rotor connecting seat 12; the multiple sections of piezoelectric connectors 13 are respectively arranged between the stator connecting seats 11 and the rotor connecting seats 12; one end of the single piezoelectric connector 13 is connected with a piezoelectric connection point on the stator connection seat 11 to realize connection with the stator connection seat 11, and the other end of the single piezoelectric connector is connected with a piezoelectric connection point on the rotor connection seat 12 to realize connection with the rotor connection seat 12.
Specifically, the piezoelectric connecting member 13 includes a detecting member 131 and a piezoelectric element 132, and the detecting member 131 includes a first conductive layer 1311 and a second conductive layer 1312 respectively disposed on both sides of the piezoelectric element 132; the first conductive layer 1311 may be electrically connected to the detection circuitry by an electrical signal connection 6; the second conductive layer 1312 may be electrically connected to the detection circuit through the electrical signal connector 6, so that, when the piezoelectric element 132 deforms, a potential difference is generated between the first conductive layer 1311 and the second conductive layer 1312, and the detection circuit may receive an electrical signal of the first conductive layer 1311 through the electrical signal connector 6 and an electrical signal of the second conductive layer 1312 through the electrical signal connector 6, so as to obtain the potential difference, and then obtain the deformation amount of the piezoelectric element 132 from the potential difference.
Specifically, as shown in fig. 1, the electrical signal connectors 6 are shown in four cases, and other cases may be referred to as arrangements, which are not specifically limited in the embodiments of the present application
The motor described in the embodiments of the present application includes at least the following advantages;
in this embodiment, the piezoelectric connector is respectively connected to the stator connecting seat and the rotor connecting seat, the stator connecting seat is disposed on the stator assembly, and the rotor connecting seat is disposed on the rotor assembly, so that the stator assembly drives the rotor assembly to move relative to the stator assembly, thereby completing focusing of the lens and driving the piezoelectric connector to deform. The piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, and the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can obtain the deformation quantity of the piezoelectric piece through the detection piece, and further the position information of the lens is judged. In the embodiment of the application, the detection circuit can feed back the position of the lens in real time under the condition that the motor works, closed-loop control is formed, the lens can be conveniently and accurately moved to the clearly focused position according to the position information of the lens, the focusing time of the lens is shortened, and the user experience is improved.
On the other hand, the embodiment of the application also discloses an electronic device which specifically comprises the motor.
The electronic device described in the embodiments of the present application includes, but is not limited to, a mobile phone, a tablet, a computer, or a camera.
The electronic device described in the embodiments of the present application includes at least the following advantages:
in this application embodiment, the piezoelectric connecting piece respectively with the stator connecting seat with the active cell connecting seat links to each other, the stator connecting seat set up in stator module, the active cell connecting seat set up in active cell subassembly, like this stator module drive the active cell subassembly is relative under the circumstances that stator module removed, can accomplish focusing to the camera lens, and can drive piezoelectric connecting piece deformation. The piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, and the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can obtain the deformation quantity of the piezoelectric piece through the detection piece, and further the position information of the lens is judged. In the embodiment of the application, the detection circuit can feed back the position of the lens in real time under the condition that the motor works, closed-loop control is formed, the lens can be conveniently and accurately moved to the clearly focused position according to the position information of the lens, the focusing time of the lens is shortened, and the user experience is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (14)
1. A motor is characterized by comprising a stator component, a rotor component, an elastic connecting component and a detection circuit, wherein,
the elastic connecting assembly comprises a stator connecting seat, a rotor connecting seat and a piezoelectric connecting piece, the stator connecting seat is arranged on the stator assembly, the rotor connecting seat is arranged on the rotor assembly, the rotor connecting seat is elastically connected with the stator connecting seat, and the piezoelectric connecting piece is respectively connected with the stator connecting seat and the rotor connecting seat; the stator assembly can drive the rotor assembly to move relative to the stator assembly and drive the piezoelectric connecting piece to deform;
the piezoelectric connecting piece comprises a detection piece and a piezoelectric piece, wherein the detection piece is respectively connected with the detection circuit and the piezoelectric piece, so that the detection circuit can acquire the deformation quantity of the piezoelectric piece through the detection piece.
2. The motor according to claim 1, wherein the detecting member includes a first conductive layer and a second conductive layer stacked, the first conductive layer and the second conductive layer being respectively disposed on opposite sides of the piezoelectric member, the piezoelectric member being electrically connected to the first conductive layer and the second conductive layer, respectively;
the detection circuit is respectively and electrically connected with the first conducting layer and the second conducting layer, and in the deformation process of the piezoelectric connecting piece, the detection circuit obtains the deformation quantity of the piezoelectric piece through the potential difference between the first conducting layer and the second conducting layer.
3. The motor of claim 1, wherein the piezoelectric element is a sheet structure having elasticity, one end of the piezoelectric element is connected to the stator connecting seat, the other end of the piezoelectric element is connected to the mover connecting seat, and the mover connecting seat and the stator connecting seat are elastically connected through the piezoelectric element.
4. The motor according to any one of claims 1 to 3, wherein the elastic connection assembly further comprises an elastic connection member, one end of the elastic connection member is connected to the stator connection seat, the other end of the elastic connection member is connected to the mover connection seat, and the mover connection seat and the stator connection seat are elastically connected by the elastic connection member.
5. The motor of claim 4, wherein the elastic connection member is an elastic reed, and the piezoelectric connection member is an elastic reed provided with the piezoelectric element.
6. The motor of claim 1, further comprising a drive circuit disposed to the stator assembly, the mover assembly including a drive coil, the piezoelectric coupling being a conductive coupling;
the driving coil is connected with the driving circuit through the piezoelectric connecting piece, and the driving circuit is used for supplying power to the driving coil;
and under the condition that the drive coil is electrified to generate a magnetic field, the drive coil drives the rotor assembly to move relative to the stator assembly and drives the piezoelectric connecting piece to deform.
7. The motor as claimed in claim 1, further comprising a control circuit, wherein the detection circuit obtains the displacement of the mover assembly according to the deformation amount of the piezoelectric element to determine that the mover assembly is in the vibration state, and the control circuit suppresses the vibration of the elastic coupling assembly.
8. The motor of claim 1, further comprising a control circuit, wherein the detecting member includes a first conductive layer and a second conductive layer stacked, the first conductive layer and the second conductive layer being respectively disposed on opposite sides of the piezoelectric member, the piezoelectric member being electrically connected to the first conductive layer and the second conductive layer, respectively;
the control circuit controls the voltage loaded on the first conducting layer and the second conducting layer, so that the piezoelectric element deforms under the action of an electric field between the first conducting layer and the second conducting layer, and the piezoelectric connecting element deforms along the direction opposite to the vibration direction under the action of the deformation of the piezoelectric element so as to inhibit the vibration of the piezoelectric connecting element.
9. The motor as claimed in claim 4, wherein the stator connecting seats are sleeved outside the mover connecting seats, and the elastic connectors and the piezoelectric connectors are alternately disposed between the stator connecting seats and the mover connecting seats.
10. The motor of claim 1, further comprising a spacer, the stator assembly comprising a housing, the spacer disposed between the resilient coupling assembly and the housing insulating the resilient coupling assembly from the housing;
the gasket is internally provided with a conductive circuit electrically connected with the detection piece, the conductive circuit is electrically connected with the detection circuit, and the conductive circuit is used for transmitting the electric signal acquired by the detection piece to the detection circuit.
11. The motor of claim 1, wherein the detecting member includes a first conductive layer and a second conductive layer stacked on each other, the first conductive layer and the second conductive layer being respectively disposed on opposite sides of the piezoelectric member, the piezoelectric member being electrically connected to the first conductive layer and the second conductive layer, respectively;
the motor comprises a first gasket and a second gasket which are stacked on two sides of the elastic connecting component, a first conducting circuit which is electrically connected with the first conducting layer is arranged in the first gasket, and a second conducting circuit which is electrically connected with the second conducting layer is arranged in the second gasket;
the detection circuit acquires the electric signal acquired by the detection piece through the first conductive line and/or the second conductive line.
12. The motor of claim 11, further comprising a first electrical signal connector and a second electrical signal connector, one end of the first electrical signal connector being connected to the stator connection mount to electrically connect the first conductive layer, the other end of the first electrical signal connector being connected to the first pad to electrically connect the first conductive trace;
one end of the second electrical signal connecting piece is connected with the stator connecting seat to be electrically connected with the second conducting layer, and the other end of the second electrical signal connecting piece is connected with the second gasket to be electrically connected with the second conducting circuit.
13. The motor of claim 2, wherein the stator connecting seat is sleeved outside the rotor connecting seat, piezoelectric connecting points are arranged on the stator connecting seat and the rotor connecting seat, a multi-segment separated piezoelectric connecting piece is arranged between the stator connecting seat and the rotor connecting seat, and two ends of the piezoelectric connecting piece are respectively connected with the piezoelectric connecting points on the stator connecting seat and the piezoelectric connecting points on the rotor connecting seat;
the motor further comprises a plurality of electrical signal connecting pieces, one end of each electrical signal connecting piece is connected with the piezoelectric connecting point on the stator connecting seat, the other end of each electrical signal connecting piece is electrically connected with the detection circuit, and the electrical signal connecting pieces are electrically connected with the corresponding first conducting layers and the corresponding second conducting layers in the piezoelectric connecting pieces respectively so as to obtain the deformation quantity of the piezoelectric pieces in the piezoelectric connecting pieces.
14. An electronic device comprising the motor according to any one of claims 1 to 13.
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| CN202210824083.0A CN115297233B (en) | 2022-07-13 | 2022-07-13 | Motor and electronic device |
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