Patent Application
20230030236
The present disclosure relates to A technical field of acoustics, and more particularly, to an exciter and an electronic product.
Direct-driven exciters for sounding on display are widely used now, which enable electronic devices to generate stereo effect so that users can have a good use experience. Therefore, such products have a high degree of acceptance among the consumers.
At present, commonly used exciters include integrated exciters and separated exciters. Whether it is a separated or an integrated exciter, coils used in the exciter are made of circular cross-sectional enameled wires. For a coil wound with the circular cross-sectional enameled wires, turns of the coil are arranged tangent to each other due to the shape characteristics of the enameled wire, and an interval between two adjacent turns of enameled wire is large. In this case, the number of turns of coil is less for a certain winding space, resulting in a shorter effective length of the coil. Accordingly, the driving force the coil subjected in the magnetic field is small.
In view of the above, it is necessary to improve the coil of a conventional exciter to increase the driving force, which is relatively small.
An object of the present disclosure is to provide an exciter that solves the above problem to increase the driving force of a conventional exciter, which is relatively small.
Another object of the present disclosure is to provide an electronic product including the above-mentioned exciter.
An exciter, including: a magnetic circuit assembly including a first housing and a magnet, and the magnet is coupled to the first housing; and a coil assembly including a second housing and a coil, and the coil is disposed in a magnetic field formed by the magnet, wherein the coil is coupled to the second housing, wherein the coil assembly is configured to be capable of generating a vibration relative to the magnetic circuit assembly, and wherein the coil is formed by winding a wire having a polygonal cross section.
Optionally, the wire has a rectangular cross section.
Optionally, the wire has a square cross section.
Optionally, the magnet is provided in pairs, and two magnets in each pair of magnets have the same magnetization direction.
Optionally, two pairs of magnets are arranged along a vibration direction of the coil assembly, and magnetization directions of the two pairs of magnets are opposite to each other to form a magnetic circuit.
Optionally, in the vibration direction of the coil assembly, a spacing between the two pairs of magnets is less than or equal to a height of a winding hole of the coil in the vibration direction.
Optionally, an elastic sheet is provided on the second housing, and the magnet is coupled to the elastic sheet.
Optionally, the elastic sheet is integrally formed with the second housing.
Optionally, two adjacent wires in the coil are adhered by adhesive.
An electronic product, including:
the above-mentioned exciter;
a fixed member;
a vibrating member configured to be capable of vibrating relative to the fixed member,
wherein one of the first housing and the second housing is coupled to the vibrating member, and the other one of the first housing and the second housing is coupled to the fixed member.
The technical solution of the present disclosure has the following beneficial effect: the coil wire has a polygonal cross section, so that a interval between the wires can be reduced in the wound coil, the number of turns of the coil is increased in the same space, the effective length of the coil is increased, and the driving force generated from the coil is increased.
Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure, and serve to explain the principle of the present disclosure together with the description thereof.
Reference numerals: 10—first housing; 20—magnet; 201—first pair of magnets; 202—second pair of magnets; 30—coil; 301—wire; 40—second housing; 401—fixed portion; 402—elastic sheet.
Various exemplary embodiments of the present disclosure 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, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the disclosure, unless otherwise specified.
The following description of at least one exemplary embodiment is merely illustrative in fact and is not intended to limit the disclosure, its applications or uses.
Techniques, methods, and apparatus known to those skilled in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.
In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Accordingly, other examples of the exemplary embodiment may have different values.
It should be noted that similar numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in a drawing, it does not need to be further discussed in subsequent drawings.
At present, commonly used exciters include integrated exciters and separated exciters. Whether it is a separated or an integrated exciter, coils used in the exciter are made of circular cross-sectional enameled wires. For a coil wound with the circular cross-sectional enameled wires, turns of the coil are arranged tangent to each other due to the shape characteristics of the enameled wire, and an interval between two adjacent turns of enameled wire is large. In this case, the number of turns of coil is less for a certain winding space, resulting in a shorter effective length of the coil. Accordingly, the driving force the coil subjected in the magnetic field is small. In view of the above, it is necessary to improve the coil of a conventional exciter to increase the driving force, which is relatively small.
The present disclosure provides an exciter, including: a magnetic circuit assembly including a first housing and a magnet, the magnet is coupled to the first housing; and a coil assembly including a second housing and a coil, and the coil is disposed in a magnetic field formed by the magnet, wherein the coil is coupled to the second housing, wherein the coil assembly is configured to be capable of generating a vibration relative to the magnetic circuit assembly, and wherein the coil is formed by winding a wire having a polygonal cross section.
Referring to
The coil of the present disclosure can be formed by winding a wire. The wire for winding the coil may be an enameled copper wire or a copper clad aluminum wire. The material of the wire is not limited. Optionally, the wire may have a polygonal-shaped cross-section. That is, the wire has a prismatic shape. By using the wires having a polygon cross section, outer surfaces of two adjacent wires may contact with each other in the wound coil, the contact area between the wires can be increased, and thus the interval between the adjacent wires can be reduced.
In the present disclosure, the coil wire has a polygonal-shaped cross-section, so that outer surfaces of the wires are in surface contact in the wound coil, the interval between the wires can be effectively reduced. As such, within the same coil volume, a winding length of the wire can be increased. According to the relationship between the driving force generated from the energized coil in the magnetic field and the length of the wire, F=B*I*L, where B is a magnetic field strength of the magnet, I is a current passing through the coil, and L is a length of the wire. It can be known that in the case that the magnetic field strength and the current remain unchanged, the driving force on the coil can be significantly increased when the length of the wire is increased, thereby improving the vibration performance of the exciter.
Optionally, the wire has a rectangular cross section.
As an embodiment of the present disclosure, the cross section of the wire 301 may be rectangular. When the coil 30 is formed by winding the wire with rectangular cross-section, the interval between the wires in the coil can be further reduced, and the winding length of the wire within the same winding space can be increased, thereby increasing the driving force of the magnetic field on the coil and thus improve the vibration performance of the exciter.
Optionally, the wire has a square cross section.
As shown in
Optionally, the magnet is provided in pairs, and two magnets in each pair of magnets have the same magnetization direction.
As an embodiment of the present disclosure, as shown in
Optionally, two pairs of magnets are arranged along a vibration direction of the coil assembly, and magnetization directions of the two pairs of magnets are opposite to each other to form a magnetic circuit.
As shown in
Optionally, in the vibration direction of the coil assembly, a spacing between the two pairs of magnets is less than or equal to a height of a winding hole of the coil in the vibration direction.
As an embodiment of the present disclosure, as shown in
Optionally, an elastic sheet is provided on the second housing, and the magnet is coupled to the elastic sheet.
Optionally, the elastic sheet is integrally formed with the second housing.
As an embodiment of the present disclosure, as shown in
Optionally, the fixed portion 401 is disposed at a central portion of the second housing 40, and the elastic sheet 402 is disposed on both sides of the fixed portion. Referring to
Optionally, two adjacent wires in the coil are adhered by adhesive.
As an embodiment of the present disclosure, for example, a thin layer of adhesive may be coated on a surface of a quadrangular wire 301, and two adjacent wires are connected and fixed by adhesive. After coil 30 is wound, the wires are arranged orderly and are not easy to scatter. Optionally, the thickness of the adhesive is negligible relative to the length or width of the cross section of the wire, i.e., the thickness of the adhesive is less than the length or width of the cross section of the wire. In this way, the advantages of the shape of the wire can be fully utilized, so as to reduce the interval between the wires.
Optionally, the exciter further includes a flexible circuit board disposed between the coil and the second housing.
As an embodiment of the present disclosure, the exciter further includes a flexible circuit board. The flexible circuit board is used to electrically connect a circuit or a power supply device other than the coil and the exciter to apply an electric signal into the coil. Optionally, other circuit components may also be integrated on the flexible circuit board. As an example, the flexible circuit board may be disposed between the coil and the second housing. That is, the flexible circuit board is coupled to the second housing, and the coil is coupled to a side of the flexible circuit board away from the second housing. In this embodiment, not only the convenience of connecting the flexible circuit board and the second housing is improved, but also the electrical connection structure between the coil and the flexible circuit board can be simplified. Optionally, the flexible circuit board may be coupled to the fixed portion of the second housing, and the coil is coupled to the flexible circuit board. Connecting the flexible circuit board to the fixed portion can avoid interference between the flexible circuit board and the magnet.
The present disclosure also provides an electronic product. The electronic product includes the exciter as described above, and further includes a product body, the product body divided into a fixed member and a vibrating member, wherein one of the first housing and the second housing is coupled to the vibrating member, and the other one of the first housing and the second housing is coupled to the fixed member, and wherein the vibrating member is configured to be capable of vibrating relative to the fixed member. The vibrating member may be a screen and a back cover of the electronic product for vibration and sound generating (the following description is illustrated by taking the screen as an example). The fixed portion is a part of the structure of the product body, and the fixed portion may be a middle frame, a side wall, a PCB, or other structures of the product body. In the product body, structural components such as partitions and middle frames are commonly disposed in order to place other electronic devices. These structural components have good structural stability in electronic products, they are used to place electronic devices and protect the electronic devices. Therefore, by using such structural components in the product body as the fixed member, the vibration reliability can be improved.
The exciter is disposed in the product body. The electronic product may be a mobile phone, a tablet computer, etc., which is not limited in the present disclosure. The screen is disposed on the product body and is used as a display screen of the electronic product. The screen is driven to vibrate and sound through the interaction between the coil and the magnetic component.
In the present disclosure, the coil is formed by winding the prismatic wire, the length of the wire is increased, and the driving force generated from the coil is increased, which is conducive to increasing the vibration amplitude of the coil, thereby improving the loudness of the sound signal from the electronic product.
In the present disclosure, the coil wire has a rectangular cross section, so that the interval between the wires can be reduced in the wound coil, the number of turns of the coil can be maximized in the same space, the effective length of the coil can be increased, and the driving force generated from the coil can be increased, the vibration performance of the exciter can be improved. Meanwhile, the magnets arranged in pairs can increase the magnetic field strength and correct the magnetic lines of force, so that the magnetic induction lines pass through the coil vertically to improve the driving force of the magnet on the coil. Multiple pairs of magnets can increase the magnetic field strength, and on the other hand, the distance between the two pairs of magnets is less than or equal to the height of the winding hole in the vertical direction, which can ensure that the magnetic induction lines pass through the parts with wires on the winding plane, which ensures the effective area of the coil interacting with the magnet, thereby increasing the driving force on the coil. In addition, two adjacent wires are connected and fixed by adhesive, which can improve the structural stability of the coil and prevent the wires from loosing.
Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are provided for illustration only and not for the purpose of limiting the scope of the present disclosure. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the invention is defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201911397782.6 | Dec 2019 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/134118 | 12/5/2020 | WO |
