CN113396463B - Dual function magnet actuator - Google Patents

Dual function magnet actuator Download PDF

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Publication number
CN113396463B
CN113396463B CN201980090903.4A CN201980090903A CN113396463B CN 113396463 B CN113396463 B CN 113396463B CN 201980090903 A CN201980090903 A CN 201980090903A CN 113396463 B CN113396463 B CN 113396463B
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magnet
housing
alternating magnetic
magnetic force
coil
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CN113396463A (en
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奥西·马恩帕阿
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0289—Transducers, loudspeakers, moving coil arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/066—Electromagnets with movable winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/14—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

A magnet actuator (1) comprising: a first housing means (2) comprising a first housing (2a), a first balance magnet (2b), a first coil (2c) partially surrounding the first balance magnet (2b), and a first suspension means (2 d); and a second housing means (3) comprising a second housing (3a), a second balance magnet (3b), a second coil (3c) partially surrounding said second balance magnet (3b) and a second suspension means (3 d). A main magnet (4) is arranged between said first suspension means (2d) and said second suspension means (3d) and is fixedly connected to said second suspension means (3 d). Repulsive force (F) C 2) Counteracting an attractive force (F) generated between the first housing (2a) and the main magnet (4) C 1) Such that the first housing means (2) and the main magnet (4) are continuously in a force equilibrium state. Attractive force (F) C 4) Counteracting a repulsive force (F) generated between the second housing (3a) and the main magnet (4) C 3) So that the second housing means (3) and the main magnet (4) are continuously in a force equilibrium state. The first coil (2c) and the main magnet (4) are used for generating a first alternating magnetic force (F) A 1) The second coil (3c) and the main magnet (4) being adapted to generate a second alternating magnetic force (F) A 2). Controlling the current in the first coil (2c) causes the first alternating magnetic force (F) A 1) -varying, thereby causing a displacement (D) between the first housing means (2) and the main magnet (4); and/or controlling the current in the second coil (3c) causes the second alternating magnetic force (F) A 2) Is varied, thereby causing a displacement (D) between the second housing means (3) and the main magnet (4). The dual action of the magnet actuator facilitates its use over a wider range of resonant frequencies, for example to produce sound simultaneouslyWaves and tactile feedback.

Description

Dual function magnet actuator
Technical Field
The present disclosure relates to a magnet actuator comprising a first housing device, a second housing device and a main magnet.
Background
The electronic device may be provided with a magnet actuator to generate sound waves, such as audio. The prior art magnet actuators include magnets that attract or repel each other. Initially, the magnets are arranged in a force equilibrium state, but in order to generate sound waves, the attractive or repulsive force between the magnets is changed by a current flowing through a coil located between the magnets, wherein the current causes at least one of the magnets to move such that the distance between the magnets is reduced or increased.
As disclosed in GB2532436, the magnets of the audio actuator may be interconnected by an elastic support element, wherein the elastic support element counteracts an attractive or repulsive force between the magnets, such that the magnets and the elastic support element are in a force equilibrium state as long as no current is supplied. The different components of the audio magnet actuator of GB2532436 are integrated in the device structure and are disposed between the main elements of the device.
The appearance of the assembled electronic device can only be assessed after the force equilibrium state has been reached, i.e. after the assembly of the main components of the device has been completed. Any possible defects due to variations in the dimensional tolerances of each individual element in the structure, variations in the forces between the magnets or variations in the forces caused by the elastic support elements are only visible after assembly and will subsequently be time-consuming and costly to repair.
Furthermore, since the mechanical stiffness of the vibrating components of the electronic device, such as the display screen, is traditionally high, which is necessary to make the electronic device sufficiently durable, the resonant frequency of the audio magnet actuator is typically too high to generate both audio and haptic feedback. Haptic feedback requires that the resonance frequencies be low enough for the user to effectively perceive them with a finger. One conventional method for providing haptic feedback is to use a linear resonant actuator that can specifically tune the resonant frequency to 100-200Hz, thereby effectively facilitating haptic feedback.
Disclosure of Invention
It is an object of the present invention to provide an improved magnet actuator. The above and other objects are achieved by the features of the independent claims. Further implementations are apparent from the dependent claims, the detailed description and the drawings.
According to a first aspect, there is a magnet actuator comprising: a first housing means including a first housing, a first balance magnet, a first coil partially surrounding the first balance magnet, and a first suspension means; a second housing means including a second housing, a second balance magnet, a second coil partially surrounding the second balance magnet, and a second suspension means; a main magnet disposed between said first suspension means of said first housing means and said second suspension means of said second housing means, said main magnet being fixedly connected to said second suspension means; a first constant attractive force is generated between the first housing and the main magnet, the first balance magnet and the main magnet for generating a first constant repulsive force that counteracts the first constant attractive force, such that the first housing device and the main magnet are continuously in a force equilibrium state; a second constant repulsive force is generated between the second housing and the main magnet, the second balance magnet and the main magnet for generating a second constant attractive force counteracting the second constant repulsive force, so that the second housing device and the main magnet are continuously in a force equilibrium state; the first coil and the main magnet are used for generating a first alternating magnetic force; the second coil and the main magnet are used for generating a second alternating magnetic force; wherein controlling the current in the first coil causes the first alternating magnetic force to vary, thereby causing displacement between the first housing means and the main magnet; and/or wherein controlling the current in the second coil causes the second alternating magnetic force to change, thereby causing a displacement between the second housing means and the main magnet.
The magnet and the housing in such a magnet actuator are in force equilibrium, thereby facilitating the manufacture of an electronic device in which the magnet actuator is placed. Initially, the attractive forces caused by the magnet and the housing are balanced such that other components of the electronic device remain unaffected by, for example, variations in the force or variations in the dimensions of different components of the magnet actuator. This approach reduces the number of defective electronic devices, thereby reducing manufacturing and maintenance costs. Furthermore, such a magnet actuator is sufficiently robust and space efficient. Furthermore, this dual action facilitates the magnet actuator being able to be used in a wider range of resonant frequencies, for example to generate both acoustic and tactile feedback.
In one possible implementation of the first aspect, the first alternating magnetic force and the second alternating magnetic force are one of an attractive force and a repulsive force, and the first alternating magnetic force and the second alternating magnetic force are generated and/or varied individually or simultaneously, thereby allowing vibrations to be generated by the housing in any desired direction or in both directions along the central axis of the magnet actuator.
In yet another possible implementation manner of the first aspect, the first alternating magnetic force and the second alternating magnetic force are generated simultaneously, both the first alternating magnetic force and the second alternating magnetic force are attractive forces or repulsive forces, and the main magnet is continuously in an equilibrium position between the first suspension device and the second suspension device, thereby facilitating the application of a first function by the movement of the housing, such as generating vibrations in a higher resonance frequency interval to generate e.g. sound waves.
In yet another possible implementation manner of the first aspect, the first and second housing means are displaced at different resonance frequencies by controlling the current in the first and second coils such that the first and second alternating magnetic forces are simultaneously varied to different extents, so as to allow simultaneous generation of, for example, sound waves and vibrations for haptic feedback in a wider resonance frequency interval and to reduce the space required for components capable of generating sound waves and vibrations for haptic feedback.
In yet another possible implementation manner of the first aspect, by controlling the current in the first coil and the second coil such that the first alternating magnetic force and the second alternating magnetic force are simultaneously changed to the same extent, the first housing device and the second housing device are both displaced relative to the main magnet by a first displacement distance in opposite directions, and the main magnet is continuously in the equilibrium position between the first suspension device and the second suspension device, thereby facilitating the implementation of a bidirectional and space-efficient magnet actuator.
In yet another possible implementation manner of the first aspect, only one of the first alternating magnetic force and the second alternating magnetic force is generated and/or changed, the first alternating magnetic force or the second alternating magnetic force is an attractive force or a repulsive force, and the first housing device is displaced by a first displacement distance relative to the main magnet by controlling the current in the first coil or the second housing device is displaced by the first displacement distance relative to the main magnet by controlling the current in the second coil, thereby facilitating implementation of a magnet actuator generating vibrations in only one selected direction.
In yet another possible implementation of the first aspect, the first alternating magnetic force and the second alternating magnetic force are generated simultaneously, the first alternating magnetic force is an attractive force and the second alternating magnetic force is a repulsive force, or the first alternating magnetic force is a repulsive force and the second alternating magnetic force is an attractive force, thereby facilitating application of a second function by movement of the main magnet, e.g. generating vibrations within a lower resonance frequency interval, to generate e.g. tactile feedback.
In yet another possible implementation manner of the first aspect, by controlling the currents in the first coil and the second coil such that the first alternating magnetic force and the second alternating magnetic force are simultaneously changed by the same degree, the main magnet is displaced by a second displacement distance relative to the first housing device and the second housing device, and the first housing device and the second housing device are continuously in an equilibrium position in the magnet actuator, thereby facilitating implementation of the magnet actuator that generates vibration without affecting the outer dimensions of the magnet actuator.
In yet another possible implementation manner of the first aspect, only one of the first alternating magnetic force and the second alternating magnetic force is generated and/or changed, the first alternating magnetic force or the second alternating magnetic force is an attractive force or a repulsive force, and the main magnet is displaced by a second displacement distance relative to the first housing device and the second housing device by controlling the current in the first coil; or by controlling the current in the second coil such that the main magnet is displaced a second displacement distance relative to the first housing means and the second housing means, thereby facilitating the realization of a magnet actuator that generates vibrations in only one selected direction.
In yet another possible implementation manner of the first aspect, the shifting the first shift distance and the shifting the second shift distance are performed simultaneously, thereby facilitating generation of vibrations within the lower resonance frequency interval and the higher resonance frequency interval simultaneously.
In yet another possible implementation of the first aspect, the displacing the first displacement distance is performed at a first resonance frequency and the displacing the second displacement distance is performed at a second resonance frequency, the first resonance frequency being at least 3 times higher than the second resonance frequency, thereby facilitating, for example, simultaneous generation of acoustic waves and haptic feedback.
In yet another possible implementation form of the first aspect, the first suspension means is at least partially compressed in response to a displacement between the first housing means and the main magnet, and/or the second suspension means is at least partially compressed in response to a displacement between the second housing means and the main magnet, thereby providing support for the component and facilitating transmission of vibrations in a lower resonance frequency range.
In yet another possible implementation form of the first aspect, the first coil and the first balance magnet are disposed between the inner surface of the first housing and the first suspension device, the second coil and the second balance magnet are disposed between the inner surface of the second housing and the second suspension device, and the main magnet is at least partially surrounded by the first housing and the second housing. This is a simple and reliable construction which provides adequate protection for the different components and which effectively confines the magnetic field in the cavity formed by the first and second housings.
In yet another possible implementation manner of the first aspect, the first housing and the second housing confine the magnetic force to a closed space within at least one of the first housing and the second housing, thereby preventing the magnetic field from interfering with other objects.
According to a second aspect, there is an electronic device comprising: a movable surface, a cover, an equipment chassis enclosed by the movable surface and the cover, and a magnet actuator according to the above arranged between the movable surface and the equipment chassis and/or the cover; the magnet actuator is for displacing the movable surface relative to the device chassis and/or the cover in response to a displacement between the main magnet of the magnet actuator and the first housing means and/or in response to a displacement between the main magnet of the magnet actuator and the second housing means.
By providing the magnet actuator in the electronic device in a state of equilibrium from the beginning, other components of the electronic device are kept unaffected by e.g. variations in forces or dimensions within the magnet actuator. This approach reduces the number of defective electronic devices, thereby reducing manufacturing and maintenance costs. Furthermore, this solution facilitates the realization of a very stable magnet actuator capable of withstanding large external forces.
In one possible implementation of the second aspect, the first housing of the magnet actuator engages the movable surface, the second housing of the magnet actuator engages the device chassis or the cover, and displacement of the movable surface generates vibrations within the electronic device having a first resonant frequency, thereby facilitating generation of, for example, sound waves.
In a further possible implementation of the second aspect, the magnet actuator is configured to displace the main magnet relative to the movable surface, the device chassis and/or the cover, the displacement of the main magnet generating a vibration having a second resonance frequency within the electronic device, thereby facilitating generation of, for example, haptic feedback.
In yet another possible implementation of the second aspect, the movable surface is a display screen, thereby facilitating the generation of vibrations without the need for additional separate components.
These and other aspects will be apparent from the embodiments described below.
Drawings
In the following detailed part of the disclosure, these aspects, embodiments and implementations will be explained in more detail in connection with exemplary embodiments shown in the drawings, in which:
FIG. 1 shows a schematic cross-sectional side view of an electronic device according to an embodiment of the invention;
FIG. 2 illustrates a partial cross-sectional side view of a magnet actuator according to an embodiment of the present invention;
FIG. 3 illustrates a partially exploded view of the magnet actuator shown in FIG. 2;
FIG. 4a shows a partial cross-sectional side view of an embodiment of a magnet actuator in a state of equilibrium;
FIG. 4b shows a partial cross-sectional side view of an electronic device including the magnet actuator of FIG. 4a, wherein the magnet actuator is in an unbalanced state;
FIG. 5a shows a partial cross-sectional side view of an embodiment of a magnet actuator in a state of equilibrium;
FIG. 5b shows a partial cross-sectional side view of an electronic device including the magnet actuator shown in FIG. 5a, wherein the magnet actuator is in an unbalanced state;
FIG. 6a shows a partial cross-sectional side view of an embodiment of a magnet actuator in a state of equilibrium;
FIG. 6b shows a partial cross-sectional side view of an electronic device including the magnet actuator shown in FIG. 6a, wherein the magnet actuator is in an unbalanced state;
FIG. 7a shows a partial cross-sectional side view of an embodiment of a magnet actuator in a state of equilibrium;
fig. 7b shows a partial cross-sectional side view of an electronic device comprising the magnet actuator shown in fig. 7a, wherein the magnet actuator is in an unbalanced state.
Detailed Description
Fig. 2 shows an embodiment of a magnet actuator 1 according to the present disclosure, and fig. 1 shows an embodiment of an electronic device 5 comprising said magnet actuator 1 according to the present disclosure.
The magnet actuator 1 comprises a first housing means 2, a second housing means 3 and a main magnet 4 arranged substantially between the first housing means 2 and the second housing means 3.
The first housing means 2 includes a first housing 2a, a first balance magnet 2b, and a first coil 2c partially surrounding the first balance magnet 2b, as shown in fig. 3, and a first suspension means 2 d. The second housing means 3 includes a second housing 3a, a second balance magnet 3b and a second coil 3c partially surrounding the second balance magnet 3b as shown in fig. 3, and a second suspension means 3 d.
The first case 2a and the second case 3a are made of a magnetic material such as steel. Furthermore, the housings 2a and 3a may each be shaped as a hollow cylinder having one closed end and one open end, i.e., each housing 2a and 3a is substantially U-shaped in cross section along its central axis, which corresponds to the central axis of the magnet actuator 1. The outer peripheral surface of each of the housings 2a and 3a may be circular or oval, or polygonal, for example.
The open end of the first housing 2a and the open end of the second housing 3a are disposed to face each other, thereby allowing the magnet to be at least partially surrounded by the first housing 2a and the second housing 3 a. This allows the first and second housings 2a and 3a to confine any magnetic force generated by the magnet actuator 1 to a closed space within at least one of the first and second housings 2a and 3 a.
The first balance magnet 2b, the first coil 2c and the first suspension device 2d are at least partially surrounded by the first housing 2 a. The first coil 2c and the first balance magnet 2b are disposed between the inner surface of the first housing 2a and the first suspension device 2d, and are fixed to the first housing 2a preferably by an adhesive.
Accordingly, the second balance magnet 3b, the second coil 3c and the second suspension means 3d are at least partially enclosed by the second housing 3 a. The second coil 3c and the second balance magnet 3b are disposed between the inner surface of the second housing 3a and the second suspension device 3d, and are preferably fixed to the second housing 3a by an adhesive. The first suspension device 2d and the second suspension device 3d may include a spring or a soft suspension material layer having a low rigidity. The first coil 2c and the second coil 3d may be planar voice coils, and are connected to an audio amplifier.
The main magnet 4 is arranged between the first suspension means 2d of the first housing means 2 and the second suspension means 3d of the second housing means 3. The main magnet 4 is fixedly connected to the second suspension means 3d, while being completely disconnected from the first suspension means 2d, thereby allowing the main magnet 4 to float between the suspension means 2d and 3 d. The main magnet 4 may be either adjacent to the first suspension means 2d or separated from the first suspension means 2d by an air gap.
During actuation of the magnet actuator 1, the first suspension means 2D may be at least partially compressed in response to a displacement D between the first housing means 2 and the main magnet 4, and/or the second suspension means 3D may be at least partially compressed in response to a displacement D between the second housing means 3 and the main magnet 4. Fig. 5b shows an embodiment in which both the first suspension device 2d and the second suspension device 3d have been compressed. Fig. 4b shows an embodiment in which both the first suspension device 2d and the second suspension device 3d have been deployed. Fig. 6b shows an embodiment in which the first suspension device 2d has been deployed and the second suspension device 3d has been compressed. Fig. 7b shows an embodiment in which the first suspension device 2d has been compressed and the second suspension device 3d has been deployed.
As shown in fig. 3, the first constant attractive force F C 1 is generated between said first housing 2a and said main magnet 4. The first balance magnet 2b and the main magnet 4 are used to generate a force counteracting the first constant attractive force F C 1 first constant repulsive force F C 2 such that the first housing means 2 and the main magnet 4 are continuously in a force equilibrium state. Accordingly, a second constant repulsive force F C 3 are generated between said second housing 3a and said main magnet 4. The second balance magnet 3b and the main magnet 4 are used for generating a force counteracting the second constant repulsive force F C 3 second constant attractive force F C 4 such that the second housing means 3 and the main magnet 4 are continuously in a force equilibrium state.
As shown in fig. 4-7, the first coil 2c and the main magnet 4 are used for generating a first alternating magnetic force F A 1, the second coil 3c and the main magnet 4 being adapted to generate a second alternating magnetic force F A 2. By controlling the current in the first coil 2c, the first alternating magnetic force F is caused A 1, which in turn causes a displacement D between the first housing means 2 and the main magnet 4. The displacement D may comprise a movement of the first housing means 2 relative to the stationary main magnet 4, or the main magnet 4 may be movable relative to the stationary first housing means 2. Inducing said second alternating magnetic force F by controlling the current in said second coil 3c A 2, which in turn causes a displacement D between the second housing means 3 and the main magnet 4. Said displacement D may comprise a movement of said second housing means 3 relative to the stationary main magnet 4, or said main magnet 4 may be moved relative to the stationary second housing means 3.
Said first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 is one of an attractive force and a repulsive force, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are generated and/or varied individually or simultaneously.
In some embodiments, as shown in FIGS. 4 a-5 bThe first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are generated simultaneously. The first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are both attractive or repulsive, allowing the main magnet 4 to be constantly in an equilibrium position between the first suspension means 2d and the second suspension means 3 d.
The first alternating magnetic force F can also be made by controlling the current in the first coil 2c and the second coil 3c A 1 and said second alternating magnetic force F A 2 are simultaneously varied to the same extent. As shown in fig. 4b and 5b, the first housing device 2 and the second housing device 3 are both displaced in opposite directions by a first displacement distance d1 relative to the main magnet 4. This allows the height of the magnet actuator 1 to be varied in accordance with the AC drive signal while the main magnet 4 is continuously in the equilibrium position between the first suspension means 2d and the second suspension means 3 d.
The first coil 2c and the second coil 3c are driven by reverse-phase potentials. By positive phase signal, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are both repulsive forces forcing the first housing means 2 and the second housing means 3 away from each other in opposite directions and increasing the height of the magnet actuator 1. By a negative phase signal, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are both attractive forces forcing the first housing means 2 and the second housing means 3 to oppose each other in opposite directions and reducing the height of the magnet actuator 1.
The first alternating magnetic force F can be made by controlling the current in the first coil 2c and the second coil 3c A 1 and said second alternating magnetic force F A 2 are simultaneously varied to different extents so that the first housing means 2 and the second housing means 3 are displaced at different resonance frequencies.
In one embodiment, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 only one of which is generated and/or changed. Said first alternating magnetic force F A 1 or said second alternating magnetic force F A 2 is an attractive or repulsive force. The first housing means 2 can be displaced by a first displacement distance d1 with respect to the main magnet 4 by controlling the current in the first coil 2 c. Alternatively, the second housing means 3 is displaced by a first displacement distance d1 relative to the main magnet by controlling the current in the second coil 3 c.
In an embodiment, as shown in fig. 6b and 7b, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 are simultaneously generated, the first alternating magnetic force F A 1 is an attractive force and the second alternating magnetic force F A 2 is a repulsive force, or, said first alternating magnetic force F A 1 is a repulsive force and the second alternating magnetic force F A And 2 is an attractive force.
The first coil 2c and the second coil 3c are driven by in-phase potentials. The first alternating magnetic force F A 1 and said second alternating magnetic force F A 2 forces the main magnet 4 in the same direction away from one of the first housing means 2 and the second housing means 3 and towards the other of the second housing means 3 and the first housing means 2. The original height of the magnet actuator 1 is maintained due to the structure to which the magnet actuator 1 is mounted.
The first alternating magnetic force F may be caused by controlling the current in the first coil 2c and the second coil 3c A 1 and said second alternating magnetic force F A 2 are simultaneously varied to the same extent. This allows the main magnet 4 to be displaced by a second displacement distance d2 relative to the first housing means 2 and the second housing means 3, which first housing means and the second housing means 3 are continuously in an equilibrium position in the magnet actuator 1.
In one embodiment, the first alternating magnetic force F A 1 and said second alternating magnetic force F A 2, said first alternating magnetic force F A 1 or said second alternating magnetic force F A 2 is an attractive or repulsive force. This allows to control in said first coil 2cCurrent, so that the main magnet 4 is displaced by a second displacement distance d2 with respect to the first housing means 2 and the second housing means 3; or by controlling the current in the second coil 3c such that the main magnet 4 is displaced a second displacement distance d2 with respect to the first housing means 2 and the second housing means 3.
In an embodiment, the displacement D the first displacement distance D1 is performed at a first resonance frequency belonging to a first resonance frequency interval and the displacement D the second displacement distance D2 is performed at a second resonance frequency belonging to a second resonance frequency interval. The first resonant frequency is at least 3 times higher than the second resonant frequency, for example, the first resonant frequency may be about 1000Hz and the second resonant frequency about 100 Hz. The lower second resonance frequency is facilitated due to the low stiffness of the suspension arrangement. This allows sufficient movement of the main magnet 4 to generate vibrations having the second resonance frequency without affecting the position of the first housing means 2 and the second housing means 3. Typically, the first resonant frequency interval is adapted to produce vibrations in the form of sound waves to the user and the second resonant frequency interval is adapted to produce vibrations in the form of tactile feedback to the user. The second resonant frequency interval may also be suitable for use as a subwoofer, thereby extending the audio frequency band to frequencies that are too low to be contained within the first resonant frequency interval.
The displacement D the first displacement distance D1 at the first resonance frequency and the displacement D the second displacement distance D2 at the second resonance frequency may be performed simultaneously, i.e. the acoustic wave and the tactile feedback may be generated simultaneously or separately. In an embodiment, the second suspension arrangement 3 transmits vibrations at a first resonance frequency, but not at a second resonance frequency, by allowing the generation of sound waves by vibrations in one direction at said first resonance frequency, to minimize privacy leakage, while at the same time allowing vibrations at a second resonance frequency, to minimize vibration coupling in the opposite direction, with for example the back cover of the electronic device comprising said magnet actuator 1.
The present disclosure also relates to an electronic device 5 comprising: a movable surface 6, such as a display screen, a cover 7, a device chassis 8 enclosed by said movable surface 6 and said cover 7, and a magnet actuator 1, as schematically shown in fig. 1. The magnet actuator 1 is arranged between the movable surface 6 and the device chassis 8 and/or the cover 7. The device chassis may comprise a Printed Circuit Board (PCB) and the cover 7 may comprise a rear cover of the electronic device. The magnet actuator 1 is adapted to displace the movable surface 6 relative to the device chassis 8 and/or the cover 7 in response to a displacement D between the main magnet 4 of the magnet actuator 1 and the first housing means 2 and/or in response to a displacement D between the main magnet 4 of the magnet actuator 1 and the second housing means 3.
In an embodiment, the first housing 2a of the magnet actuator 1 is attached to the movable surface 6, preferably by an adhesive, and the second housing 3a of the magnet actuator 1 is attached to the equipment chassis 8 or the cover 7, preferably by an adhesive. Due to the stiffness of the movable surface 6 and the device chassis 8 or the cover 7, the system comprising the movable surface 6, the device chassis 8 or the cover 7 and the magnet actuator 1 has a high spring point resonance, facilitating the achievement of high resonance frequencies.
The displacement D of the movable surface 6 by the magnet actuator 1 generates a vibration having a first resonance frequency within the electronic device 5. The movable surface 6 may be displaced such that it bends in a direction away from the device chassis 8 or the cover 7 during positive phase signals or in a direction towards the device chassis 8 or the cover 7 during negative phase signals.
The magnet actuator 1 may be used to displace the main magnet 4 relative to the movable surface 6, the device chassis 8 and/or the cover 7. The displacement D of the main magnet 4 generates a vibration with a second resonance frequency within the electronic device 5. The second resonance frequency is facilitated due to the low stiffness of the suspension apparatus. This allows sufficient movement of the main magnet 4 to generate vibrations having the second resonance frequency, but not enough to overcome the stiffness of the movable surface 6 and the device chassis 8 or the cover 7, and subsequently move the first housing means 2 and the second housing means 3.
Various aspects and implementations are described herein in connection with various embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the subject matter, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Reference signs used in the claims shall not be construed as limiting the scope.

Claims (20)

1. A magnet actuator (1), characterized by comprising:
a first housing means (2) comprising a first housing (2a), a first balance magnet (2b), a first coil (2c) partially surrounding the first balance magnet (2b), and a first suspension means (2 d);
a second housing means (3) comprising a second housing (3a), a second balance magnet (3b), a second coil (3c) partially surrounding the second balance magnet (3b), and a second suspension means (3 d);
a main magnet (4) arranged between said first suspension means (2d) of said first housing means (2) and said second suspension means (3d) of said second housing means (3), said main magnet (4) being fixedly connected to said second suspension means (3 d);
first constant attractive force (F) C 1) Is generated between the first housing (2a) and the main magnet (4), the first balance magnet (2b) and the main magnet (4) being used to generate a force counteracting the first constant attractive force (F) C 1) First constant repulsive force (F) C 2) -keeping the first housing means (2) and the main magnet (4) continuously in a force equilibrium state;
second constant repulsive force (F) C 3) Produced fromBetween the second housing (3a) and the main magnet (4), the second balance magnet (3b) and the main magnet (4) being adapted to generate a counteracting second constant repulsive force (F) C 3) Of a second constant attractive force (F) C 4) So that the second housing means (3) and the main magnet (4) are continuously in a force equilibrium state;
the first coil (2c) and the main magnet (4) are used for generating a first alternating magnetic force (F) A 1)；
The second coil (3c) and the main magnet (4) are used for generating a second alternating magnetic force (F) A 2)；
Wherein controlling the current in the first coil (2c) causes the first alternating magnetic force (F) A 1) -a change, causing a displacement (D) between the first housing means (2) and the main magnet (4); and/or
Wherein controlling the current in the second coil (3c) causes the second alternating magnetic force (F) A 2) -a change, causing a displacement (D) between the second housing means (3) and the main magnet (4);
wherein the first coil (2c) and the first balance magnet (2b) are arranged between the inner surface of the first housing (2a) and the first suspension means (2d), and the second coil (3c) and the second balance magnet (3b) are arranged between the inner surface of the second housing (3a) and the second suspension means (3 d).
2. Magnet actuator (1) according to claim 1, characterized in that the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) The first alternating magnetic force (F) is one of an attractive force and a repulsive force A 1) And said second alternating magnetic force (F) A 2) Produced and/or varied individually or simultaneously.
3. Magnet actuator (1) according to claim 2, characterized in that the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Simultaneously generating the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Are all attractiveOr a repulsive force, said main magnet being constantly in an equilibrium position between said first suspension means (2d) and said second suspension means (3 d).
4. A magnet actuator (1) according to claim 3, characterized in that the first alternating magnetic force (F) is caused by controlling the current in the first coil (2c) and the second coil (3c) A 1) And said second alternating magnetic force (F) A 2) Simultaneously, to different extents, so that the first housing arrangement (2) and the second housing arrangement (3) are displaced at different resonance frequencies.
5. A magnet actuator (1) according to claim 3, characterized in that the first alternating magnetic force (F) is caused by controlling the current in the first coil (2c) and the second coil (3c) A 1) And said second alternating magnetic force (F) A 2) Simultaneously, the same degree of variation occurs, so that the first housing means (2) and the second housing means (3) are both displaced a first displacement distance (d1) in opposite directions with respect to the main magnet (4), the main magnet (4) being continuously in the equilibrium position between the first suspension means (2d) and the second suspension means (3 d).
6. Magnet actuator (1) according to claim 2, characterized in that the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Only one of them is generated and/or changed, said first alternating magnetic force (F) A 1) Or said second alternating magnetic force (F) A 2) -displacing the first housing means (2) with respect to the main magnet (4) by a first displacement distance (d1) by controlling the current in the first coil (2c) or-displacing the second housing means (3) with respect to the main magnet by a first displacement distance (d1) by controlling the current in the second coil (3c) for an attractive or repulsive force.
7. The magnet actuator (1) according to claim 2, characterized in that the first alternationMagnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Simultaneously generating the first alternating magnetic force (F) A 1) Is an attractive force and the second alternating magnetic force (F) A 2) Is a repulsive force, or said first alternating magnetic force (F) A 1) Is a repulsive force and the second alternating magnetic force (F) A 2) Is an attractive force.
8. A magnet actuator (1) according to claim 7, characterized in that the first alternating magnetic force (F) is caused by controlling the current in the first coil (2c) and the second coil (3c) A 1) And said second alternating magnetic force (F) A 2) Simultaneously, the same degree of change occurs, so that the main magnet (4) is displaced by a second displacement distance (d2) relative to the first housing means (2) and the second housing means (3), which housing means (3) are continuously in an equilibrium position in the magnet actuator (1).
9. The magnet actuator (1) according to claim 5, characterized in that the first alternating magnetic force (F) is caused by controlling the current in the first coil (2c) and the second coil (3c) A 1) And said second alternating magnetic force (F) A 2) Simultaneously, the same degree of change occurs, so that the main magnet (4) is displaced by a second displacement distance (d2) relative to the first housing means (2) and the second housing means (3), the first housing means and the second housing means (3) being continuously in an equilibrium position in the magnet actuator (1).
10. Magnet actuator (1) according to claim 2, characterized in that the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Is generated and/or changed, said first alternating magnetic force (F) A 1) Or said second alternating magnetic force (F) A 2) -displacing the main magnet (4) with respect to the first housing device (2) and the second housing device (3) a second displacement distance (d2) by controlling the current in the first coil (2c) for an attractive or repulsive force; or
By controlling the current in the second coil (3c), the main magnet (4) is displaced a second displacement distance (d2) relative to the first housing means (2) and the second housing means (3).
11. Magnet actuator (1) according to claim 6, characterized in that the first alternating magnetic force (F) A 1) And said second alternating magnetic force (F) A 2) Is generated and/or changed, said first alternating magnetic force (F) A 1) Or said second alternating magnetic force (F) A 2) -displacing the main magnet (4) a second displacement distance (d2) with respect to the first housing device (2) and the second housing device (3) by controlling the current in the first coil (2c) for an attractive or repulsive force; or alternatively
By controlling the current in the second coil (3c), the main magnet (4) is displaced a second displacement distance (d2) relative to the first housing means (2) and the second housing means (3).
12. Magnet actuator (1) according to claim 9 or 11, characterized in that displacing (D) the first displacement distance (D1) and displacing (D) the second displacement distance (D2) are performed simultaneously.
13. A magnet actuator (1) according to claim 9 or 11, characterized in that displacing (D) the first displacement distance (D1) is performed at a first resonance frequency and displacing (D) the second displacement distance (D2) is performed at a second resonance frequency, the first resonance frequency being at least 3 times higher than the second resonance frequency.
14. The magnet actuator (1) according to any of claims 1-11, characterized in that the first suspension means (2D) is at least partially compressed in response to a displacement (D) between the first housing means (2) and the main magnet (4) and/or the second suspension means (3D) is at least partially compressed in response to a displacement (D) between the second housing means (3) and the main magnet (4).
15. Magnet actuator (1) according to any of claims 1-11, characterized in that the main magnet (4) is at least partially enclosed by the first housing (2a) and the second housing (3 a).
16. The magnet actuator (1) of claim 15, wherein the first housing (2a) and the second housing (3a) confine the magnetic force to an enclosed space within at least one of the first housing (2a) and the second housing (3 a).
17. An electronic device (5), comprising: -a movable surface (6), -a cover (7), -an equipment chassis (8) enclosed by the movable surface (6) and the cover (7), and-a magnet actuator (1) according to any of claims 1 to 14, the magnet actuator (1) being arranged between the movable surface (6) and the equipment chassis (8) and/or the cover (7);
the magnet actuator (1) is configured to displace the movable surface (6) relative to the device chassis (8) and/or the cover (7) in response to a displacement (D) between the main magnet (4) of the magnet actuator (1) and the first housing means (2) and/or in response to a displacement (D) between the main magnet (4) of the magnet actuator (1) and the second housing means (3).
18. The electronic device (5) of claim 17, wherein the first housing (2a) of the magnet actuator (1) abuts the movable surface (6), wherein the second housing (3a) of the magnet actuator (1) abuts the device chassis (8) or the cover (7), and wherein a displacement (D) of the movable surface (6) generates a vibration having a first resonant frequency within the electronic device (5).
19. The electronic device (5) according to claim 17 or 18, characterized in that the magnet actuator (1) is adapted to displace the main magnet (4) relative to the movable surface (6), the device chassis (8) and/or the cover (7), the displacement (D) of the main magnet (4) generating a vibration with a second resonance frequency within the electronic device (5).
20. Electronic device (5) according to claim 17 or 18, characterized in that the movable surface (6) is a display screen.
CN201980090903.4A 2019-02-13 2019-02-13 Dual function magnet actuator Active CN113396463B (en)

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JP2759330B2 (en) * 1988-12-28 1998-05-28 株式会社いすゞセラミックス研究所 Electromagnetic valve drive
US6091167A (en) * 1997-06-23 2000-07-18 Systems, Machines, Automation Components, Corporation Double coil actuator
CN1521773A (en) * 2003-01-29 2004-08-18 吴经奋 Constant magnetic bistable actuating element and actuator thereof
TWI252961B (en) * 2004-08-04 2006-04-11 Delta Electronics Inc Magnetic dynamic diaphragm controller
DE102008014677A1 (en) * 2008-03-18 2009-09-24 Continental Automotive Gmbh Method and device for operating a circuit arrangement
KR101084860B1 (en) * 2009-07-22 2011-11-21 삼성전기주식회사 Horizontal Linear vibrator
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KR101328587B1 (en) * 2013-04-30 2013-11-13 재단법인차세대융합기술연구원 Permanent magnet actuator
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