A kind of exciter and electronic product

Abstract

The present invention provides an exciter and an electronic product. The exciter includes: a magnetic circuit component, the magnetic circuit component includes a first shell and a magnet, the magnet is connected to the first shell; a coil component, the coil component includes a second shell and a coil, the coil is arranged in the magnetic field formed by the magnet; the coil is connected to the second shell; the coil component is configured to generate vibration relative to the magnetic circuit component; the coil is wound by a wire, and the cross-sectional shape of the wire is a polygon. The present invention sets the cross-sectional shape of the coil wire to a polygon, which can reduce the gap between the wires when the coil is wound, increase the number of turns of the coil in the same space, extend the effective length of the coil, and thus increase the driving force on the coil.

Description

Technical Field

[0001] The present invention relates to the field of acoustic technology, and more specifically, to an exciter and an electronic product. Background Art

[0002] At present, direct-drive screen sound exciters are widely used, which can make electronic devices produce stereo sound effects and give users a good user experience. Therefore, consumers have a high degree of recognition for this type of product.

[0003] Common exciters currently used include integrated exciters and split exciters. Regardless of whether it is split or integrated, the coil used in the exciter is wound by cylindrical enameled wire. Due to the shape characteristics of the enameled wire, the turns of the coil wound by the cylindrical enameled wire are arranged tangentially, and the gap between two adjacent turns of enameled wire is large. In this case, the number of coil turns is small in the same winding space, resulting in a shorter effective length of the coil. This makes the driving force on the coil in the magnetic field smaller.

[0004] In view of this, it is necessary to improve the coil of the existing exciter to solve the problem that the driving force applied to the coil is relatively small. Summary of the invention

[0005] An object of the present invention is to provide an exciter that solves the problem of small driving force on the coil.

[0006] Another object of the present invention is to provide an electronic product comprising the above-mentioned actuator.

[0007] A magnetic circuit assembly, the magnetic circuit assembly comprising a first shell and a magnet, the magnet being connected to the first shell;

[0008] A coil assembly, the coil assembly comprising a second shell and a coil, the coil being disposed in the magnetic field formed by the magnet; the coil being connected to the second shell;

[0009] The coil assembly is configured to generate vibration relative to the magnetic circuit assembly;

[0010] The coil is formed by winding a wire, and the cross-section of the wire is a polygon.

[0011] Optionally, the cross-sectional shape of the wire is rectangular.

[0012] Optionally, the cross-sectional shape of the wire is square.

[0013] Optionally, the magnets are arranged in pairs, and the two magnets in each pair have the same magnetization direction.

[0014] Optionally, two pairs of magnets are provided along the vibration direction of the coil assembly, and the magnetization directions of the two pairs of magnets are opposite to each other, forming a magnetic circuit.

[0015] Optionally, in the vibration direction of the coil assembly, the distance between the two pairs of magnets is less than or equal to the height of the winding hole of the coil in this direction.

[0016] Optionally, a spring sheet is provided on the second shell, and the magnet is connected to the spring sheet.

[0017] Optionally, the spring sheet and the second shell are integrally formed.

[0018] Optionally, two adjacent wires in the coil are connected by an adhesive.

[0019] An electronic product, comprising the above-mentioned exciter;

[0020] Fixings;

[0021] a vibrating member, the vibrating member being configured to vibrate relative to the fixing member;

[0022] One of the first shell and the second shell is connected to the vibrating member, and the other of the first shell and the second shell is connected to the fixing member.

[0023] The beneficial effect of the technical solution described in the present invention is that by setting the cross-sectional shape of the coil wire to a polygon, the gap between the wires can be reduced when the coil is wound, the number of turns of the coil can be increased in the same space, the effective length of the coil can be extended, and the driving force exerted on the coil can be increased.

[0024] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0026] Figure 1 is an exploded diagram of an actuator according to an embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of an actuator according to an embodiment of the present invention;

[0028] Figure 3 is an exploded diagram of an actuator according to an embodiment of the present invention;

[0029] Figure 4 is a cross-sectional view of an actuator according to an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of a coil and a cross section thereof according to an embodiment of the present invention;

[0031] The markings in the figure are as follows: 10 first shell; 20 magnet; 201 first magnet pair; 202 second magnet pair; 30 coil; 301 wire; 40 second shell; 401 fixing part; 402 spring piece. DETAILED DESCRIPTION

[0032] 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 components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] At present, the coils used in the exciter are all wound by cylindrical enameled wires. The shape characteristics of the cylindrical enameled wires result in the coils being arranged tangentially, and the gap between two adjacent turns of enameled wires is large. In this case, the number of coil turns is small within the same winding space, resulting in a shorter effective length of the coil. This results in a smaller driving force on the coil in the magnetic field. Therefore, it is necessary to improve the coils of the existing exciter to solve the problem of the smaller driving force on the coils.

[0038] The present invention provides an exciter, comprising: a magnetic circuit assembly, the magnetic circuit assembly comprising a first shell and a magnet, the magnet being connected to the first shell; a coil assembly, the coil assembly comprising a second shell and a coil, the coil being arranged in a magnetic field formed by the magnet; the coil being connected to the second shell; the coil assembly being configured to generate vibration relative to the magnetic circuit assembly; the coil being wound by a wire, the cross-sectional shape of the wire being a polygon.

[0039] As an embodiment of the present invention, Figures 1 to 4 As shown, the exciter includes a magnetic circuit component and a coil component. The magnetic circuit component includes a first shell 10 and a magnet 20. The coil component includes a coil 30 and a second shell 40. Optionally, the first shell is a box-shaped structure, and the first shell is snapped on the second shell to form a receiving chamber of the exciter, which is used to accommodate various components of the exciter, such as a magnet, a coil, etc. The magnet is connected to the first shell. Optionally, the magnet is connected to the inner wall of the box-shaped structure. In the present invention, the magnet can be bonded to the first shell by an adhesive. The magnet is used to form a magnetic field, and the coil is arranged in the magnetic field generated by the magnet, and the magnetic flux of the magnet passes through the coil. The coil is connected to the second shell. When the exciter is working, an alternating electrical signal is passed into the coil, and the coil in the magnetic field is subjected to the Ampere force, and the coil generates vibration relative to the magnetic circuit component. In the present invention, the magnet can be connected to the second shell at the same time. When the magnet is connected to the second shell at the same time, the magnet and the coil are respectively connected to different positions of the second shell, and relative displacement can be generated between the magnet and the coil.

[0040] The coil of the present invention can be wound with a wire. The wire for winding the coil can be an enameled copper wire or a copper-clad aluminum wire. The present invention does not limit the material of the wire. Optionally, the cross-sectional shape of the wire is set to a polygon. In other words, the shape of the wire is a prism. Setting the cross-sectional shape of the wire to a polygon can make the outer planes of two adjacent wires fit together when winding the coil, thereby increasing the contact area between the wires and reducing the gap between adjacent wires.

[0041] The present invention sets the cross-sectional shape of the wire used for winding the coil to a polygon. When winding the coil, the outer side surfaces of the wire are in contact with each other in a plane, which can effectively reduce the gap between the wires. In this way, the winding length of the wire can be increased within the same coil volume. According to the relationship between the driving force exerted on the energized coil in the magnetic field and the length of the wire F=B*I*L, where B is the magnetic field strength of the magnet, I is the current passed through the coil, and L is the length of the wire, it can be seen that under the condition that the magnetic field strength and the current remain unchanged, extending the length of the wire can significantly increase the driving force exerted on the coil, thereby improving the vibration performance of the exciter.

[0042] Optionally, the cross-sectional shape of the wire is rectangular.

[0043] As an embodiment of the present invention, the cross-sectional shape of the wire 301 can be set to a rectangular shape. When the wire with this cross-sectional shape is wound around the coil 30, the gap between the wires in the coil can be further reduced, and the winding length of the wire in the same winding space can be increased, thereby increasing the driving force generated by the magnetic field on the coil and improving the vibration performance of the exciter.

[0044] Optionally, the cross-sectional shape of the wire is square.

[0045] like Figure 5 As shown, the cross-sectional shape of the wire 301 can be set to a square to improve the central symmetry of the wire. When the coil 30 is wound, it is easier to stack the wires seamlessly, reduce or even eliminate the gaps between the wires, and extend the effective length of the wires in the coil, thereby increasing the driving force generated by the magnetic field on the coil and improving the vibration performance of the exciter. At the same time, the seamless stacking of the wires can also improve the utilization of space.

[0046] Optionally, the magnets are arranged in pairs, and the two magnets in each pair have the same magnetization direction.

[0047] As an embodiment of the present invention, Figures 1 to 4 As shown, the magnets 20 are arranged in pairs. A magnetic gap is formed between the two magnets arranged in pairs. During installation, the coil 30 is arranged in the magnetic gap so that the magnetic flux lines generated by the magnet pass through the coil. The magnets arranged in pairs can not only enhance the magnetic field strength, increase the driving force on the coil, and improve the vibration performance of the exciter, but also improve the symmetry of the internal structure of the exciter and improve the uniformity of mass distribution. Optionally, the magnetizing directions of the two magnets in each pair of magnets are the same. The magnetizing directions of the two magnets 20 in pairs are arranged to be the same so that the N poles and S poles of the two magnets are opposite, that is, the magnetic flux lines emitted from the N pole of one of the magnets pass through the coil and reach the S pole of the other magnet. In this way, the magnetic flux lines can pass through the coil vertically, which is conducive to increasing the magnetic induction intensity perpendicular to the direction of the coil 30, thereby increasing the driving force of the coil and improving the vibration performance of the exciter.

[0048] Optionally, two pairs of magnets are provided along the vibration direction of the coil assembly, and the magnetization directions of the two pairs of magnets are opposite to each other, forming a magnetic circuit.

[0049] As an embodiment of the present invention, Figures 1 to 4 As shown, two pairs of magnets 20 are provided along the vibration direction of the coil assembly, that is, in the vertical direction in the figure. Figure 1 or Figure 3 The first magnet pair 201 and the second magnet pair 202 are shown. Providing two pairs of magnets can enhance the magnetic field strength generated by the magnets, thereby increasing the driving force on the coil. The magnetization directions of the first magnet pair and the second magnet pair are opposite. Optionally, the magnetization directions of the two pairs of magnets are respectively toward the left and right sides in the horizontal direction. Setting the magnetization directions of the two pairs of magnets in opposite directions can form a complete magnetic circuit, increase the amount of magnetic flux lines passing through the coil 30, and help increase the interaction force between the coil and the magnet.

[0050] Optionally, in the vibration direction of the coil assembly, the distance between the two pairs of magnets is less than or equal to the height of the winding hole of the coil in this direction.

[0051] As an embodiment of the present invention, Figures 1 to 4 As shown, along the vibration direction of the coil assembly, there is a certain distance between the first magnet pair 201 and the second magnet pair 202. After the wire is wound to form the coil 30, a winding hole is left in the middle of the coil. The coil is installed in the magnetic gap, and its winding plane is parallel to the vertical direction. The distance between the two pairs of magnets is less than or equal to the height of the winding hole in the vertical direction. This setting method can ensure that the parts with wires on the winding plane are all passed by magnetic flux lines, ensuring the effective area of ​​the magnet acting on the coil, which is beneficial to increase the driving force on the coil and improve the vibration performance of the exciter.

[0052] Optionally, a spring sheet is provided on the second shell, and the magnet is connected to the spring sheet.

[0053] Optionally, the spring sheet and the second shell are integrally formed.

[0054] As an embodiment of the present invention, Figure 3 As shown, a spring sheet 401 is provided on the second shell 40. The spring sheet is used to form a connection between the second shell and the magnet. Optionally, the spring sheet and the second shell are integrally formed. In this case, the internal structure of the exciter can be simplified. Optionally, a fixing portion 402 is also provided on the second shell. The spring sheet can produce displacement relative to the fixing portion. Optionally, the displacement of the spring sheet relative to the fixing portion is in the vertical direction. As an example, the spring sheet can be a sheet-like structure protruding outward from the second shell and forming a certain angle with the horizontal plane of the second shell, and the sheet-like structure can be elastically deformed to cause an end of the sheet-like structure away from the horizontal plane of the second shell to undergo vertical elastic displacement. Optionally, the magnet is connected to the spring sheet and the coil is connected to the fixing portion. When the coil vibrates under the action of the driving force, the relative movement of the coil and the magnet can be generated by the vibration of the magnet connected to the spring sheet. This structural form allows both the magnet and the coil to be arranged on the second shell, reducing the number of components in the exciter and reducing the complexity of the internal structure of the exciter.

[0055] Optionally, the fixing portion 401 is disposed in the middle of the second housing 40, and the elastic sheet 402 is disposed on both sides of the fixing portion. Figure 3 In the present invention, the fixing part is arranged in the middle part of the second shell, and the spring pieces are arranged on both sides of the fixing part, which can improve the convenience of installing the coil and the magnet.

[0056] Optionally, two adjacent wires in the coil are connected by an adhesive.

[0057] As an embodiment of the present invention, a thin layer of adhesive is coated on the prism surface of the quadrangular prism-shaped wire 301, and two adjacent wires are connected and fixed by the adhesive. In this way, when the coil 30 is wound, the wires are arranged neatly and are not easy to be scattered. Optionally, the thickness of the adhesive is negligible relative to the length or width of the wire cross section, that is, the thickness of the adhesive is smaller than the length or width of the wire cross section. In this way, the shape advantage of the wire can be fully utilized to reduce the gap between the wires.

[0058] Optionally, the exciter further includes a flexible circuit board, and the flexible circuit board is arranged between the coil and the second shell.

[0059] As an embodiment of the present invention, the exciter also includes a flexible circuit board. The flexible circuit board is used to electrically connect the coil and the circuit or power supply device other than the exciter to pass an electrical signal into the coil. Optionally, other circuit components are also integrated on the flexible circuit board. As an example, the flexible circuit board can be arranged between the coil and the second shell, that is, the flexible circuit board is connected to the second shell, and the coil is connected to the side of the flexible circuit board facing away from the second shell. In this embodiment, not only the convenience of connecting the flexible circuit board to the second shell is improved, but also the electrical connection structure between the coil and the flexible circuit board can be simplified. Optionally, the flexible circuit board can be connected to the fixed part of the second shell, and the coil is connected to the flexible circuit board. Connecting the flexible circuit board to the fixed part can avoid interference between the flexible circuit board and the magnet.

[0060] The present invention also provides an electronic product. The electronic product includes the exciter as described above, and also includes a product body, the product body is divided into a fixing part and a vibrating part, one of the first shell and the second shell is connected to the vibrating part, and the other is connected to the fixing part, and the vibrating part is configured to vibrate relative to the fixing part. The vibrating part can be a screen and a back cover of the electronic product for vibrating and sounding (the following content is explained by taking the screen as an example), and the fixing part is a part of the structure of the product body, and the fixing part can be a structure such as a middle frame, a side wall or a PCB of the product body. In the product body, in order to place other electronic devices, the product body is often configured with structural components such as partitions and middle frames. These structural components have good structural stability in electronic products, and are used to place electronic devices on the one hand, and to protect electronic devices on the other hand. Therefore, using such structural components in the product body as fixing components can improve vibration reliability.

[0061] The exciter is arranged in the product body, and the electronic product may be a mobile phone, a tablet computer, etc., which is not limited in the present invention. The screen is arranged on the product body and serves as a display screen of the electronic product. The screen is driven to vibrate and make sound through the interaction force between the coil and the magnetic component.

[0062] The present invention utilizes a prismatic wire to wind a coil, thereby extending the length of the wire and increasing the driving force of the coil vibration, which is beneficial to increasing the vibration amplitude of the coil, thereby improving the loudness of the sound signal emitted by the electronic product.

[0063] In the present invention, by setting the cross-sectional shape of the coil conductor to a rectangle, the gap between the conductors can be reduced when the coil is wound, the number of turns of the coil can be maximized in the same space, the effective length of the coil can be extended, and the driving force on the coil can be increased, thereby improving the vibration performance of the exciter. At the same time, the magnets arranged in pairs can increase the magnetic field strength and correct the magnetic lines of force, so that the magnetic lines of force pass through the coil vertically, thereby increasing the driving force of the magnet on the coil. Multiple pairs of magnets can not only increase the magnetic field strength, but the spacing 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 parts of the winding plane with the conductor are all passed by the magnetic lines of force, thereby ensuring the effective area of ​​the magnet acting on the coil, which is beneficial to increase the driving force on the coil. The use of adhesive to fix the connection between two adjacent conductors can improve the structural stability of the coil and prevent the wires from falling apart.

[0064] Although some specific embodiments of the present 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 present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An exciter, It is characterized in that include: A magnetic circuit assembly, the magnetic circuit assembly comprising a first shell and a magnet, the magnet being connected to the first shell; A coil assembly, the coil assembly comprising a second shell and a coil, the coil being disposed in the magnetic field formed by the magnet; the coil being connected to the second shell; The coil assembly is configured to generate vibration relative to the magnetic circuit assembly; The coil is wound by a wire, and the cross-section of the wire is a polygon; The second shell is provided with a fixing part and a spring sheet, wherein the fixing part is arranged in the middle part of the second shell, and the spring sheet is arranged on both sides of the fixing part. The spring sheet can produce displacement relative to the fixing part, the coil is connected to the fixing part, and the magnet is connected to the spring sheet.

2. The actuator according to claim 1, It is characterized in that The cross-section of the wire is rectangular.

3. The actuator according to claim 2, It is characterized in that The cross-section of the wire is a square.

4. The actuator according to claim 1, It is characterized in that The magnets are arranged in pairs, and the two magnets in each pair have the same magnetization direction.

5. The actuator according to claim 4, It is characterized in that Two pairs of magnets are arranged along the vibration direction of the coil assembly, and the magnetization directions of the two pairs of magnets are opposite to each other, forming a magnetic circuit.

6. The actuator according to claim 5, It is characterized in that In the vibration direction of the coil assembly, the distance between the two pairs of magnets is less than or equal to the height of the winding hole of the coil in this direction.

7. The actuator according to claim 1, It is characterized in that The spring sheet and the second shell are integrally formed.

8. The actuator according to claim 1, It is characterized in that Two adjacent wires in the coil are connected by adhesive.

9. An electronic product, It is characterized in that include: The exciter according to any one of claims 1 to 8; Fixings; a vibrating member, the vibrating member being configured to vibrate relative to the fixing member; One of the first shell and the second shell is connected to the vibrating member, and the other of the first shell and the second shell is connected to the fixing member.

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