CN111355826B - Screen vibration sounding device and electronic product - Google Patents
Screen vibration sounding device and electronic product Download PDFInfo
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- CN111355826B CN111355826B CN201811574302.4A CN201811574302A CN111355826B CN 111355826 B CN111355826 B CN 111355826B CN 201811574302 A CN201811574302 A CN 201811574302A CN 111355826 B CN111355826 B CN 111355826B
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- 238000000429 assembly Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 description 15
- 238000009826 distribution Methods 0.000 description 5
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- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000036544 posture Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 230000033001 locomotion Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
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- 230000012447 hatching Effects 0.000 description 1
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- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/1688—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being integrated loudspeakers
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a screen vibration sounding device and an electronic product. This screen vibration sound generating device includes: a vibration assembly including a screen and a fixture, the screen configured to be capable of vibrating relative to the fixture; the driving assembly comprises at least one coil and at least one magnet, the coil is wound by a wire along one direction to form a closed annular structure, a through hole is formed in the middle of the coil, a wiring area of the coil is arranged around the through hole, the coil is fixedly connected with one of the screen or the fixing piece, and the magnet is fixedly connected with one of the screen and the fixing piece which is not fixedly connected with the coil; the axis of the coil is parallel to the surface of the screen, the magnet is positioned on one side of the coil, the wiring area comprises a first wiring area close to the screen and a second wiring area far away from the screen, at least one of the two wiring areas passes through a magnetic field generated by the magnet, the coil is configured to be capable of inputting alternating current signals, and an ampere force with the direction perpendicular to the surface of the screen is generated between the coil and the magnet; the vibration assembly is subjected to alternating amperage transmitted by the drive assembly to vibrationally sound the screen relative to the mount.
Description
Technical Field
The invention belongs to the technical field of electronic products, and particularly relates to a screen vibration sounding device and an electronic product.
Background
Sound emitting devices are important electroacoustic transducing elements in electronic products for converting current signals into sound. With the rapid development of electronic products in recent years, sound generating devices applied to the electronic products are correspondingly improved.
The traditional sounding device for a mobile phone receiver adopts the principle that a vibrating diaphragm pushes air to vibrate for sounding. Recently, as the comprehensive screen becomes the main development direction of the mobile phone, how to realize the function of the earphone under the design of no opening of the screen, and meanwhile, the mobile phone has better hearing experience is a technical problem facing the current. In this regard, those skilled in the art have developed a technical solution for sounding by screen vibration.
One such solution uses a linear vibration motor to drive the screen into vibration, as shown in fig. 1. The linear vibration motor has a vibrator 01, and the vibrator 01 is connected to a spring 03. The linear vibration motor has a housing 02, and the housing 02 encloses the vibrator 01, the spring 03, and the like. The housing 02 of the motor is fixedly attached to the inner surface of the cell phone screen 04. After the motor is electrified, the vibrator 01 can vibrate, and then the spring 03 is pulled to elastically deform. Vibrations generated by elastic deformation of the spring 03 are transmitted to the screen through the housing 02, and thus the screen vibrates to sound. The screen vibration sound production is realized by the technical scheme that the existing linear vibration motor is directly transferred to the screen sound production by a person skilled in the art. However, this solution has the disadvantage that the vibrations generated by the vibrator 01 are transmitted to the entire motor via the springs 03, causing the motor to vibrate together with the housing 02. In practice, the vibrator 01 resonates with the housing 02 and the screen to drive the screen to vibrate and sound. In order to generate resonance, the vibrator of the vibration motor needs to generate vibration with a larger amplitude to make the screen reach the amplitude required by the performance. Therefore, the vibration motor itself needs to occupy a larger space in the vibration direction of the vibrator, which is very disadvantageous for the light and thin structural design of the mobile phone. On the other hand, the linear vibration motor has relatively complex internal structure and more parts, increases the assembly difficulty and also increases the cost of the product.
Another technical solution adopted by those skilled in the art is shown in fig. 2, and the technical solution adopts a structural distribution mode in which an electromagnet 05 and a magnet 06 are oppositely placed, and by opening and closing the electromagnet 05 or switching the magnetic poles of the electromagnet 05, a variable adsorption and rejection effect is generated between the electromagnet 05 and the magnet 06. Then, the magnet 06 is fixed on the mobile phone screen 04, and the electromagnet 05 is fixed on a part which is fixed in the mobile phone, so that the mobile phone screen 04 can vibrate.
In this solution, assuming that the vertical displacement is x, an attractive force is provided between the two magnets, and a force F (x) is provided between the first magnet and the second magnet in relation to the displacement. The restoring force of the rigidity of the screen is F (kmsx), and the state of force balance exists at the momentAfter the coils of the electromagnet 05 are energized, the magnetic field between the two magnets is disturbed, so that the forces between the electromagnet 05 and the magnet 06 are balanced, for example: because the current enhances the attractive magnetic field in the same direction, the two magnets have a tendency to approach each other, and the screen has a reverse restoring force and a damping force during movement, so the equation of motion is:
Wherein B is equivalent magnetic induction intensity, H is equivalent magnetic field intensity, and S is equivalent area of interaction between two permanent magnets.
However, the technical scheme also has the problem of larger occupied space, which is unfavorable for the light and thin structural design of the mobile phone. On the premise of generating enough amplitude for the mobile phone screen 04, enough space needs to be reserved between the two magnets, otherwise collision between the magnets and the electromagnet 05 can be caused, and the acoustic performance of screen sounding is seriously affected. For this reason, more space must be occupied in the thickness direction of the mobile phone. In addition, the directions of the acting forces of mutual attraction and repulsion between the magnets are influenced by the axial direction of the coil and the magnetic pole directions of the magnets, and even the tiny deviation of the magnetic poles can cause the acting forces received by the two magnets to be not perpendicular to the direction of the screen, so that the screen is easy to damage in vibration.
Disclosure of Invention
The invention aims to provide a novel technical scheme for screen vibration sounding.
According to a first aspect of the present invention, there is provided a screen vibration sound generating apparatus comprising:
a vibration assembly including a screen and a mount, the screen configured to be vibratable relative to the mount;
The driving assembly comprises at least one coil and at least one magnet, the coil is wound by a wire along one direction to form a closed annular structure, a through hole is formed in the middle of the coil, a wiring area of the coil is arranged around the through hole, the coil is fixedly connected with one of the screen or the fixing piece, and the magnet is fixedly connected with one of the screen and the fixing piece which is not fixedly connected with the coil;
The axis of the coil is parallel to the surface of the screen, the coil is in a vertical posture relative to the screen, the magnet is positioned on one side of the coil, the annular end face of the coil faces the magnet, the wire area comprises a first wire area close to the screen and a second wire area far away from the screen, the wire directions of the first wire area and the second wire area are parallel to the surface of the screen, at least one of the two wire areas passes through a magnetic field generated by the magnet, the coil is configured to be capable of being electrified with alternating current signals, the electrified wire area passes through the magnetic field generated by the magnet, and ampere force with the direction perpendicular to the surface of the screen is generated between the coil and the magnet;
The alternating current signals passing through the coils enable the directions of the ampere force to be alternately and inversely changed, and the vibration assembly is subjected to alternating ampere force transmitted by the driving assembly to enable the screen to vibrate and sound relative to the fixing piece.
Optionally, the driving assembly is configured to provide two magnets corresponding to one coil, the coil is provided between the two magnets, two annular end faces of the coil face the two magnets respectively, and a magnetic field is formed between the two magnets.
Optionally, the magnetic pole direction of one of the magnets is: n is very close to the screen, S is very far away from the screen;
the magnetic pole direction of the other magnet is as follows: n is far away from the screen, S is very close to the screen;
A magnetic field is formed between the magnetic poles of the two magnets, which are close to the screen, and the first wiring area passes through the magnetic field; a magnetic field is formed between the magnetic poles of the two magnets far away from the screen, and the second wiring area passes through the magnetic field.
Optionally, the magnet adopts halbach magnet, and a side of the magnet close to the coil corresponds to a side of the halbach magnet with enhanced magnetic field.
Optionally, at least one of the first routing region and the second routing region is opposite to the magnetic pole of the side of the halbach magnet where the magnetic field is enhanced.
Optionally, the driving assembly is configured to provide two coils corresponding to one of the magnets, the two coils being located on both sides of the magnet, respectively, the magnet forming a magnetic field on both sides thereof.
Optionally, at least two sets of drive assemblies are included.
Optionally, the driving assembly includes a circuit board electrically connected to the coil, the circuit board and the coil being disposed on a same component of the vibration assembly.
According to another aspect of the present invention, there is also provided an electronic product including:
The screen vibration sounding device;
the screen is arranged on the product main body, the fixing piece is a part of structure of the product main body, and the driving assembly is arranged in the product main body.
Optionally, the fixing portion is a middle frame or a side wall in the product main body.
According to one embodiment of the present disclosure, the space occupied by the screen sound generating apparatus is effectively reduced.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic side cross-sectional view of a prior art on-screen sound production solution;
FIG. 2 is a schematic side cross-sectional view of another prior art on-screen sound emitting solution;
FIG. 3 is a schematic side sectional view of a screen vibration sound emitting device provided by the present invention;
FIG. 4 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
FIG. 5 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
FIG. 6 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
FIG. 7 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
FIG. 8 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
FIG. 9 is a schematic side cross-sectional view of another screen vibration sound emitting device provided by the present invention;
Fig. 10 is a schematic view of a partial side cross-section of an electronic product provided by the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The invention provides a screen vibration sounding device, which comprises a vibration component and a driving component. As shown in fig. 3 and 4, the vibration assembly includes a screen 11 and a fixing member 12, and the screen 11 is configured to vibrate with respect to the fixing member 12. The fixing member 12 may be a certain fixing member in the electronic apparatus to which the sound generating apparatus is applied, or may be a separately configured fixing member. The drive assembly then comprises at least one coil 21 and at least one magnet 22. The coil 21 is wound by a wire in a closed annular structure along one direction, the center of the coil 21 is provided with a through hole 211, and the periphery of the through hole is a wiring area of the coil 21. The routing area refers to an area where the lead wire in the coil 21 actually passes through, and the whole routing area is annular. The coil 21 is fixed to one of the screen 11 or the fixing member 12, and the magnet 22 is fixed to the one of the screen 11 or the fixing member 12 where the coil 21 is not provided. In the embodiment shown in fig. 3 and 4, the coil 21 is fixedly connected to the screen 11, and the magnet 22 is fixedly connected to the fixing member 12.
The coil 21 itself, which is in the shape of a closed loop, has an axis, and in the embodiment of the present invention, the axis of the coil 21 is parallel to the surface of the screen 11, and as shown in fig. 3, the coil 21 is in a vertical posture with respect to the screen 11. The magnet 22 is located at one side of the coil 21, the annular end face of the coil 21 faces the magnet 22, the axis of the coil 21 and the surface of the screen 11 are both in horizontal postures, and the magnet 22 is located at the left side of the coil 21. In another embodiment as shown in fig. 4, the magnet 22 is located on the right side of the coil 21. The routing area of the coil 21 comprises a first routing area 212 close to the screen and a second routing area 213 remote from the screen. The first 212 and second 213 routing areas are routed parallel to the surface of the screen, in the form of routing inwards and outwards along the page in the embodiment shown in fig. 3, 4. The magnet 22 is capable of generating a magnetic field, and at least one of the first trace region 212 and the second trace region 213 is configured to pass through the magnetic field generated by the magnet 22. In this way, when an alternating current signal is applied to the coil 21, an ampere force can be generated between the coil 21 and the magnet 22. The energized trace area passes through the magnetic field and can generate an ampere force. Since the magnet 22 is provided at the side of the coil 21, a part of the magnetic field generated by the magnet 22 can pass through the coil 21 in a direction parallel to the surface of the screen 11, thereby generating an ampere force in a direction perpendicular to the surface of the screen 11.
Because the coil and the magnet are respectively arranged on the screen and the fixed piece, and the current signal which is introduced into the coil is an alternating signal, the direction of the generated ampere force is alternately and reversely changed. Ampere force can be transferred directly to the screen through the drive assembly. As shown in fig. 3 and 4, the coil 21 can directly drive the screen 11 after receiving an ampere force. The ampere force can cause the relative displacement between the screen and the fixing piece, so that the screen can vibrate and sound relative to the fixing part.
Compared with the prior art, the screen vibration sounding device provided by the invention has the advantages of simpler structure and fewer parts. Taking the embodiment shown in fig. 3 as an example, the coil 21 and the magnet 22 are respectively and directly arranged on the screen 11 and the fixing piece 12, compared with the prior art, parts such as a shell, a spring and the like are omitted, and the complexity of the product structure is reduced. Moreover, the direct driving mode of directly connecting the driving component and the vibrating component simplifies the principle of driving the screen to vibrate, and the screen can directly generate vibration after receiving ampere force. The design mode effectively improves the vibration conversion efficiency, and vibration is not required to be caused to resonate through vibrator vibration so as to drive the screen to vibrate. The design enables the amplitude generated by the screen to be basically consistent with the amplitude generated by the driving component, and the space reserved for the driving component can be designed according to the performance requirement on the amplitude of the screen. There is no need to reserve a vibration space for the drive assembly that is significantly larger than the maximum amplitude of the screen. On the other hand, the magnet 22 is provided on the side surface of the coil 21, and the magnet 22 and the coil 21 do not interfere with each other in the vibration path. By means of the distributed design, the space occupied by the vibration assembly in the vibration direction can be reduced. In fig. 3, i.e. the space taken up in the up-down direction is reduced.
By combining the advantages, the screen vibration sounding device provided by the invention remarkably reduces the occupied space of the driving component in the vibration direction while reducing parts and simplifying the structure, and is suitable for the light and thin design requirements of electronic products such as mobile phones and the like.
Preferably, the drive assembly is configured in the form of two magnets 22 arranged corresponding to one coil 21, as shown in fig. 5, 6. The two magnets 22 are respectively located at two sides of the coil 21 along the axial direction of the coil 21, the coil 21 is clamped between the two magnets 22, and two annular end faces of the coil 21 face the two magnets 22 respectively. A magnetic field is formed between the two magnets 22 through which the first 212 and second 213 trace areas of the coil 21 can pass, thereby generating an ampere force between the magnets 22 and the coil 21. The magnetic field stability, symmetry and magnetic field intensity generated by the two magnets are better, so that the ampere force generated between the coil and the magnets is stronger, the direction of the ampere force is difficult to incline, and the like, and the vibration effect of the screen is more stable. In addition, by arranging two magnets, the magnetic field formed between the two magnets is more concentrated and stronger than the magnetic field formed on the side close to the coil of one magnet, and the magnetic field generated by the magnets is effectively utilized.
In the embodiment shown in fig. 3-6, the portion of the coil 21 that is capable of generating an ampere force that moves up or down is the upper and lower trace areas of the coil 21 (i.e., the portions with cross hatching in fig. 1-4). Therefore, in order to improve the magnetic field utilization rate, the magnetic field should be penetrated through the two sections of wiring areas as much as possible.
As shown in fig. 3, the present invention provides a preferred implementation of the magnetic circuit distribution when two magnets 22 are used. For the magnet 22 located on the left, its N pole is far from the screen 11, i.e. the N pole is facing upwards; with S very close to the screen 11, i.e. with the S level directed downwards. For the magnet 22 located on the right, its N pole is close to the screen 11, i.e. the N pole is facing downwards; with S pole far from the screen 11, i.e. S pole facing upwards. In this arrangement of magnets, a magnetic field can be formed between the poles of the two magnets 22 near the screen 11, for example, a magnetic field extending from the lower right N-pole to the lower left S-pole, through which the first routing area 212 passes. A magnetic field can be formed between the poles of the two magnets 22 remote from the screen 11, for example a magnetic field extending from the upper left N-pole to the upper right S-pole, through which the second trace area 213 passes. In this way, the magnetic field is passed through both sections of the trace area of the coil 21 that are effective to generate an ampere force for vibration, and the direction of the magnetic field is substantially perpendicular to the direction of the current in the coil 21, resulting in a higher efficiency of conversion into an ampere force. Further, the directions of magnetic fields passing through the upper and lower sections of wiring areas are opposite, and the directions of currents in the upper and lower sections of wiring areas are also opposite, so that the directions of ampere forces generated in the upper and lower sections of wiring areas are the same, and the magnitude of the ampere force generated between the coil and the magnet is obviously improved. The design mode can obviously improve the amplitude and the sensitivity of screen vibration.
For embodiments shown in fig. 1 and 2 in which only one magnet 22 is used to generate an ampere force in conjunction with the coil 21, the magnets 22 preferably have a pole distribution in which one pole is closer to the screen 11 and the other pole is farther from the screen 11. In this way, the directions of the magnetic fields passing through the upper and lower wiring areas can be reversed, the utilization rate of the wiring area of the coil can be improved, and the generated ampere force can be improved.
The present invention does not exclude an embodiment in which the poles of the magnet are disposed toward the coil. The magnetic poles of the magnet are directed to the coil and aligned with one of the upper and lower end routing regions of the coil, and an appropriate ampere force can be generated between the coil and the magnet to drive vibration.
Taking the embodiment shown in fig. 5 as an example, the first routing area 212 of the coil 21 is positioned in a direction perpendicular to the surface of the screen 11, corresponding to the position of the poles of the two magnets 22 close to the screen 11, when the screen 11 is in a rest position with respect to the fixed member 12. Accordingly, the position of the second routing area 213 in this direction corresponds to the position of the poles of the two magnets away from the screen 11. Thus, the two wiring areas respectively pass through the magnetic fields parallel to the surface of the screen, which are formed between the two pairs of magnetic poles of the two magnets.
After the current signal is applied to the coil 21, for example, the first signal is applied in a direction from the inside of the paper to the outside of the paper in the first wiring region 212, and in a direction from the outside of the paper to the inside of the paper in the second wiring region 213. This signal direction characteristic is due to the fact that the coil is formed by winding a wire in one direction. At this time, the magnetic fields of the two magnets 22 near the screen 11 are propagated from the right N pole to the left S pole, and downward ampere force is generated according to the left hand rule of ampere force. The magnetic fields of the two magnets 22 away from the screen 11 propagate from the left N pole to the right S pole, generating a downward amperage force according to the left hand rule of amperage force. The coil 21 directly pushes the screen 11 to move downward after receiving an ampere force.
Due to the alternating signal passing through the coil, the signal is then inverted, and the direction of the signal in the first routing region 212 is from outside to inside the paper, and the direction in the second routing region 213 is from inside to outside the paper. The two trace areas produce upward amperage force according to the left-right rule of amperage force. The coil 21 directly pulls the screen upward after receiving an ampere force.
Through the principle, the driving assembly achieves the effect of directly driving the screen to vibrate.
The invention provides a specific connection form between two magnets and a fixing piece. As shown in fig. 3 and 5, the fixing member 12 may be a plate-like structure having a notch or opening 221, and the notch or opening 221 allows the coil 21 to pass therethrough. The magnet 22 is disposed in the opening 221, and a sidewall of the magnet 22 may be coupled to a sidewall of the opening 221. The design scheme has the advantages that the magnet occupies less space in the screen vibration direction, a part of the thickness of the magnet overlaps with the fixing piece, and the design scheme is more in line with the light and thin design of electronic products such as mobile phones.
As shown in fig. 6, the fixing member 12 may be a plate-like structure or an inner surface of a housing, and the magnet 22 is directly fixed to one side surface of the fixing member 12. The design scheme has the advantages that the connection reliability of the magnet and the fixing piece is higher, the magnet is not easy to shake or loose, and the ampere force can drive the screen to vibrate more efficiently.
Preferably, as shown in fig. 7, the magnet 22 is a halbach magnet. Halbach magnets have the feature of strengthening the magnetic field on one side of the magnet and weakening the magnetic field on the other side of the magnet. In the embodiment of the present invention, the side of the magnet 22 close to the coil 21 corresponds to the side of the halbach magnet where the magnetic field is enhanced. The halbach magnet enhances the magnetic field significantly and, in a position close to the halbach magnet, the magnetic field is able to radiate outwardly in a direction approximately perpendicular to the side walls of the magnet 22. Depending on the degree of magnetization of the magnets employed, it is even possible to make its magnetic field strength and magnetic field utilization exceed those of the embodiment in which magnets are provided on both sides of the coil. Even if the halbach magnet is provided only on one side of the coil, a strong ampere force can be generated between the coil and the magnet.
The invention provides a magnetic pole distribution mode of halbach magnets. As shown in fig. 7, the halbach magnet includes three magnets, which are stacked in order from top to bottom. Wherein the poles of the two magnets of the top and bottom layers face the sides of the halbach magnets, i.e. towards or away from the coil 21, and the poles of the magnets of the middle layer face the two magnets of the upper and lower layers. On the side close to the coil 21, that is, on the side where the magnetic field of the halbach magnet is intensified, the magnetic pole of the upper magnet close to the coil 21 and the magnetic pole of the middle magnet close to the upper magnet are the same polarity, and the magnetic pole of the lower magnet close to the coil 21 and the magnetic pole of the middle magnet close to the lower magnet are the same polarity. In the embodiment shown in fig. 7, the right side of the upper magnet is N pole, and the N pole of the middle magnet is closely attached to the lower surface of the upper magnet; the right side of the lower magnet is an S pole, and the S pole of the middle magnet is tightly attached to the upper surface of the lower magnet. In this way, a strong magnetic field is formed on the right side of the halbach magnet. The magnetic induction line radiated from the N pole of the upper magnet is repelled by the N pole of the middle magnet, and only the rightward radiation is concentrated. Further, the S pole of the lower magnet receives the magnetic induction line emitted from the N pole, and the S pole is repelled by the S pole of the middle magnet, so that the magnetic induction line can only be concentrated and transmitted back to the S pole of the lower magnet from the right side of the lower magnet. Under the action of such a combined magnet, the magnetic induction lines on the right side of the magnet 22 are more concentrated, and the direction is substantially perpendicular to the side wall of the magnet 22, i.e., perpendicular to the running area of the coil 21. Such an embodiment can significantly enhance the ampere force generated between the magnet 22 and the coil 21.
Preferably, at least one of the first and second trace regions is opposite to a magnetic pole of the halbach magnet on a side where a magnetic field of the halbach magnet is enhanced. The utilization rate of the magnetic field is further improved through the design. As shown in fig. 7, the second routing region 213 of the coil 21 corresponds to the position of the N pole of the upper magnet, and the first routing region 212 of the coil 21 corresponds to the position of the S pole of the lower magnet. The routing area of the coil 21 corresponds to the position of the magnetic pole accurately, and the utilization rate of the magnetic field can be improved.
The invention is not limited to which part of the vibration assembly the coil and magnet are fixed, respectively. In the embodiment shown in fig. 3-6, the coil 21 is arranged on the screen 11, whereas in the embodiment shown in fig. 7, the coil 21 is arranged on the mount 12 and the magnet 22 is arranged on the screen 11. The two fixed connection modes can be selected according to the specific application of the invention.
Preferably, the driving assembly may further include a magnetic conductive plate, and the magnetic conductive plate may be attached to the magnet, so as to form a converging and concentrating effect on the magnetic field generated by the magnet. For example, in the embodiment shown in fig. 3, the left side of the magnet 22 may be provided with a magnetically permeable plate. The upper and lower sides of the magnet 22 may also be provided with magnetically permeable plates. By providing the magnetic conductive plate, the magnetic field generated by the magnet 22 can be concentrated in the direction not covered with the magnetic conductive plate, and the magnetic field strength can be improved. The magnetically permeable plate is typically disposed on a side of the magnet 22 remote from the coil 21, or other surface not facing the coil 21.
Alternative embodiments are also provided for the distribution, combination of the drive assemblies. For example, two coils may be provided corresponding to one magnet, the two coils being located on both sides of the magnet, respectively, the magnet being capable of forming a magnetic field on both sides thereof. Typically, a magnetic field is formed around the magnet 22, and for the drive assembly of the present invention, such as the magnet 22 shown in fig. 3, a magnetic field for generating an ampere force with the coil 21 can be formed on both the left and right sides thereof. But only the magnetic field on the right side of the magnet 22 can be practically used. In the preferred embodiment, one coil 21 is provided on both sides of the magnet 22 as shown in fig. 3, so that the utilization rate of the magnetic field can be effectively improved. The two coils 21 are arranged on the same part of the vibration assembly.
Preferably, as shown in fig. 8, the driving assembly may include two coils 21 and three magnets 22. The three magnets 22 are sequentially arranged side by side, the two coils 21 are positioned on two sides of the middle magnet 22, the two magnets 22 positioned at two ends are respectively combined with the middle magnet 22, and the two voice coils are respectively clamped between the two magnets 22. This preferred combination embodiment, on the one hand, increases the amount of ampere force that can be generated by the drive assembly and, further, makes the ampere force on the fixture and the screen more uniform and the resulting vibration more stable. On the other hand, the utilization of the magnetic field of the drive assembly is also higher.
Preferably, in the embodiment shown in fig. 9, the screen driven sound generating device includes two sets of drive assemblies. In other embodiments, further sets of drive assemblies may also be included. Corresponding to a set of vibration components, two sets of driving components can be configured at least at different positions of the screen 11, and this embodiment makes the ampere force generated between the screen 11 and the fixing member more balanced, the screen vibrates under the action of uniform ampere force, the vibration stability is better, the screen is not easy to damage, and the acoustic performance is better.
Optionally, the driving assembly further comprises a circuit board. The circuit board is electrically connected with the coil and is used for transmitting electric signals so as to enable ampere force to be formed between the coil and the magnet. The circuit board is preferably provided on the same component of the vibration assembly as the coil. As shown in fig. 3 to 5, the circuit board 23 is attached to the inner surface of the screen 11, and the voice coil is also fixedly attached to the inner surface of the screen 11.
The invention also provides an electronic product, as shown in fig. 10. The electronic product comprises the screen vibration sounding device and the product main body 3. The electronic product may be a mobile phone or a tablet computer, and the invention is not limited thereto. The screen 11 is provided on the product body 3 and serves as a display screen of an electronic product. The screen 11 may be provided in a form that one end is rotatably connected to the product body 3 and the other end is freely movable; alternatively, the screen may be made of a material having a good elastic deformability, and may be provided in such a manner that one end is fixedly connected to other fixed members and the other end is freely movable. In this way, the screen 11 is able to vibrate with respect to the product body 3. A part of the structure of the product body 3 may be used as the fixing member 12, and the driving assembly is disposed in the product body 3. For example, as shown in fig. 10, the magnet 22 is fixedly disposed on a part of the product body 3 corresponding to the fixing member 12, and the coil 21 is fixedly disposed on the screen 11. The screen can be driven to vibrate and sound through the ampere force generated by the driving assembly. The screen vibration sounding device provided by the invention is adopted in the electronic product, so that the occupied space of the electronic product in the thickness direction parallel to the screen is less, the electronic product is more beneficial to being designed thinner, and the design requirement of the electronic product for being light and thin is met. Furthermore, the design mode of directly driving the screen to vibrate omits parts such as the spring plate, the shell and the like, simplifies the processing and assembly processes of the product and reduces the cost.
Preferably, the fixing portion may be a middle frame, a side wall, or the like in the product body 3. In the product body 3, for the placement of other electronic devices, the product body 3 is often provided with structural parts such as partitions, middle frames, etc., which have good structural stability in the electronic product, on the one hand for the case electronics and on the other hand for protecting the electronics. Therefore, the use of such a structural member in the product body 3 as the fixing portion can improve the conversion rate of ampere force into vibration and improve the vibration reliability. The inner surface of the side wall of the product body 3 may also act as the fixing portion, as shown in fig. 3, 4, 7.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A screen vibration sounding apparatus, comprising:
a vibration assembly including a screen and a mount, the screen configured to be vibratable relative to the mount;
The driving assembly comprises at least one coil and at least one magnet, the coil is wound by a wire along one direction to form a closed annular structure, a through hole is formed in the middle of the coil, a wiring area of the coil is arranged around the through hole, the coil is fixedly connected with one of the screen or the fixing piece, and the magnet is fixedly connected with one of the screen and the fixing piece which is not fixedly connected with the coil;
The axis of the coil is parallel to the surface of the screen, the coil is in a vertical posture relative to the screen, the magnet is positioned on one side of the coil, the annular end face of the coil faces the magnet, the wire area comprises a first wire area close to the screen and a second wire area far away from the screen, the wire directions of the first wire area and the second wire area are parallel to the surface of the screen, at least one of the two wire areas passes through a magnetic field generated by the magnet, the coil is configured to be capable of being electrified with alternating current signals, the electrified wire area passes through the magnetic field generated by the magnet, and ampere force with the direction perpendicular to the surface of the screen is generated between the coil and the magnet;
The alternating current signals passing through the coils enable the directions of the ampere force to be alternately and inversely changed, and the vibration assembly is subjected to alternating ampere force transmitted by the driving assembly to enable the screen to vibrate and sound relative to the fixing piece.
2. The screen vibration and sound device according to claim 1, wherein the driving assembly is configured to provide two magnets corresponding to one coil, the coil is provided between the two magnets, and two annular end surfaces of the coil face the two magnets, respectively, and a magnetic field is formed between the two magnets.
3. The screen vibration and sound device according to claim 2, wherein the magnetic pole direction of one of the magnets is: n is very close to the screen, S is very far away from the screen;
the magnetic pole direction of the other magnet is as follows: n is far away from the screen, S is very close to the screen;
A magnetic field is formed between the magnetic poles of the two magnets, which are close to the screen, and the first wiring area passes through the magnetic field; a magnetic field is formed between the magnetic poles of the two magnets far away from the screen, and the second wiring area passes through the magnetic field.
4. The screen vibration and sound device according to claim 1, wherein the magnet is a halbach magnet, and a side of the magnet close to the coil corresponds to a side of the halbach magnet where a magnetic field is enhanced.
5. The screen vibration and sound device as claimed in claim 4, wherein at least one of the first and second trace areas is opposite to the magnetic pole of the side of the halbach magnet where the magnetic field is enhanced.
6. The screen vibration and sound device according to claim 1, wherein the driving assembly is configured to provide two coils corresponding to one of the magnets, the two coils being located on both sides of the magnet, respectively, the magnet forming a magnetic field on both sides thereof.
7. The screen vibratory sound device of claim 1 including at least two sets of drive assemblies.
8. The screen vibration and sound device as claimed in claim 1, wherein the driving assembly includes a circuit board electrically connected to the coil, the circuit board and coil being disposed on the same component of the vibration assembly.
9. An electronic product, comprising:
a screen vibration sound generating apparatus according to any one of claims 1 to 7;
the screen is arranged on the product main body, the fixing piece is a part of structure of the product main body, and the driving assembly is arranged in the product main body.
10. The electronic product of claim 9, wherein the fixing portion is a middle frame or a side wall in the product body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574302.4A CN111355826B (en) | 2018-12-21 | 2018-12-21 | Screen vibration sounding device and electronic product |
| PCT/CN2019/127241 WO2020125789A1 (en) | 2018-12-21 | 2019-12-21 | Screen vibration and sound generation device and electronic product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811574302.4A CN111355826B (en) | 2018-12-21 | 2018-12-21 | Screen vibration sounding device and electronic product |
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| CN111355826A CN111355826A (en) | 2020-06-30 |
| CN111355826B true CN111355826B (en) | 2024-09-17 |
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| CN114157958B (en) * | 2020-09-08 | 2023-02-03 | 维沃移动通信有限公司 | Electronic equipment and control method and control device thereof |
| CN112261178A (en) * | 2020-09-25 | 2021-01-22 | 瑞声新能源发展(常州)有限公司科教城分公司 | Mobile terminal |
| CN114173262B (en) * | 2021-11-18 | 2024-02-27 | 苏州清听声学科技有限公司 | Ultrasonic sound generator, display and electronic equipment |
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| CN209267624U (en) * | 2018-12-21 | 2019-08-16 | 歌尔股份有限公司 | Screen vibration-sound generating device and electronic product |
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| TWM388189U (en) * | 2010-01-22 | 2010-09-01 | Fortune Grand Technology Inc | Ultra thin speaker |
| CN103297905A (en) * | 2013-06-07 | 2013-09-11 | 景智电子股份有限公司 | Horn device capable of reducing resonance voice |
| CN205847579U (en) * | 2016-07-21 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Sound-producing device |
| CN106658309B (en) * | 2016-11-23 | 2019-08-02 | 歌尔股份有限公司 | Vibration-sound generating device |
| CN106973346A (en) * | 2017-01-22 | 2017-07-21 | 瑞声科技(新加坡)有限公司 | Electronic equipment |
| CN108282724B (en) * | 2018-01-03 | 2021-01-12 | 瑞声科技（南京）有限公司 | Mobile terminal |
| CN108881523B (en) * | 2018-04-28 | 2020-10-16 | 歌尔股份有限公司 | Electronic display device and electronic device |
| CN108616797B (en) * | 2018-05-23 | 2020-11-20 | 歌尔股份有限公司 | Direct drive type exciter and screen sounding device |
| CN109040916B (en) * | 2018-07-02 | 2020-09-22 | 歌尔股份有限公司 | Vibrator assembly for exciter, exciter and screen sounding device |
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| CN209267624U (en) * | 2018-12-21 | 2019-08-16 | 歌尔股份有限公司 | Screen vibration-sound generating device and electronic product |
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| CN111355826A (en) | 2020-06-30 |
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