Voice coil and loudspeaker

Abstract

The utility model discloses a voice coil and a loudspeaker, the whole voice coil is rectangular, four sides of the voice coil are respectively provided with an inner concave part which is concave towards the center of the voice coil, or the four sides of the voice coil are respectively provided with an outer convex part which protrudes away from the center of the voice coil; through the special-shaped design of the inner concave part and the outer convex part on the voice coil body, the length L of the wire of the voice coil is effectively increased, and when the voice coil is applied to a loudspeaker, the BL value can be effectively improved, and the overall performance and the sound effect loudness of a product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic products, in particular to a voice coil and a loudspeaker. Background Art

[0002] With the recent development of mobile phones, the space for modules within them has become increasingly smaller. Achieving optimal sound quality within this limited space has become a key requirement for mobile phone applications. Currently, mobile phones are limited by space, requiring speakers to achieve the highest possible performance within a given volume. Currently, no effective solution exists. Existing technologies have a small voice coil circumference, resulting in poor sound-generating device performance. Furthermore, existing solutions that increase the voice coil circumference occupy design space for the lower diaphragm assembly and may even require resizing the lower diaphragm assembly, which is clearly detrimental to speaker performance. Utility Model Content

[0003] A technical problem to be solved by the present invention is to provide a voice coil and a loudspeaker.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a voice coil, applied to a loudspeaker, the voice coil is rectangular as a whole, and the four sides of the voice coil are respectively provided with an inner concave portion recessed toward the center of the voice coil, or the four sides of the voice coil are respectively provided with an outer convex portion protruding away from the center of the voice coil.

[0005] Preferably, the inner concave portion or the outer convex portion is in a U-shape as a whole.

[0006] Preferably, the inner concave portion or the outer convex portion is provided in the middle portion of each side of the voice coil.

[0007] Preferably, along the axial direction of the voice coil, the voice coil includes a first voice coil portion and a second voice coil portion, and the wall thickness of the first voice coil portion is smaller than the wall thickness of the second voice coil portion.

[0008] The beneficial effects of this application are:

[0009] The voice coil described in the present application is applied to a loudspeaker. The voice coil is generally rectangular, and the four sides of the voice coil are respectively provided with an inner concave portion that is recessed toward the center of the voice coil, or the four sides of the voice coil are respectively provided with an outer convex portion that protrudes away from the center of the voice coil. The special-shaped design of the inner concave portion and the outer convex portion on the voice coil body effectively increases the wire length L of the voice coil. When applied to a loudspeaker, the BL value can be effectively increased, thereby improving the overall performance and sound loudness of the product.

[0010] Another technical problem to be solved by the present invention is to provide a loudspeaker.

[0011] In order to solve the above technical problems, the technical solution of the present invention is: a loudspeaker, which includes a magnetic circuit system and a vibration system, the vibration system includes a diaphragm and the voice coil mentioned above, the magnetic circuit system includes a magnet adapted to the shape of the voice coil, and the voice coil is connected to the diaphragm.

[0012] Preferably, the voice coil is provided with an inwardly concave portion, the magnet includes a central magnet and side magnets, the side magnets are located on the periphery of the central magnet, the side magnets and the central magnet are spaced apart to form a magnetic gap, and one end of the voice coil extends into the magnetic gap; the central magnet is generally rectangular, and the four sides of the central magnet are concave inwardly to fit into the concave portion of the voice coil;

[0013] The magnetic circuit system further includes a central magnetic conductive plate installed on the central magnet. The central magnetic conductive plate is rectangular in shape as a whole. The four sides of the central magnetic conductive plate are concave inwardly to match the inner concave portion of the voice coil.

[0014] Preferably, the device comprises four side magnets, the side magnets being arranged around the central magnet, the side of the side magnets facing the central magnet protruding outwards and fitting into the inner recess of the voice coil;

[0015] It also includes four side magnetic conductive plates installed on the side magnets, the side magnetic conductive plates are arranged around the central magnetic conductive plate, and the side of the side magnetic conductive plates facing the central magnetic conductive plate protrudes outward and adapts to the inner concave portion of the voice coil;

[0016] Alternatively, the side magnets are annular and arranged around the central magnet, and the side magnets facing the central magnet protrude outwards and fit into the inner recess of the voice coil;

[0017] It also includes an annular side magnetic conductive plate, which is arranged around the central magnetic conductive plate. The side magnetic conductive plate protrudes outwards on the side facing the central magnetic conductive plate and is adapted to the inner concave part of the voice coil.

[0018] Preferably, the voice coil is provided with an outwardly protruding portion, the magnet includes a central magnet, the central magnet is rectangular as a whole, the four sides of the central magnet protrude outward and are adapted to the outwardly protruding portion of the voice coil, and one end of the voice coil extends to the outside of the central magnet and is gap-fitted; and further includes a central magnetic conductive plate installed on the central magnet, the central magnetic conductive plate is rectangular as a whole, the four sides of the central magnetic conductive plate protrude outward and are adapted to the outwardly protruding portion of the voice coil.

[0019] Preferably, a centering support is further included, and the centering support is connected to the voice coil.

[0020] Preferably, it further comprises a magnetic yoke, the magnet is located on the magnetic yoke, and an avoidance groove is provided at a position where the magnetic yoke is opposite to the centering support piece.

[0021] The beneficial effects of this application are:

[0022] The speaker described in this application includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and the voice coil described above. The magnetic circuit system includes a magnet adapted to the shape of the voice coil, and the voice coil is connected to the diaphragm. When the support space of the speaker is limited, a special-shaped voice coil design is adopted to correspond to the magnetic circuit system magnet assembly and the voice coil shape design, thereby increasing the L value of the voice coil (the L value is the length of the voice coil wire) while increasing the magnet area, thereby significantly improving the performance of the entire device and the loudness of the sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0024] Figure 1 This is a schematic structural diagram of the first voice coil according to an embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of the second voice coil of the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the magnet structure of the embodiment of the utility model adapted to the first type of voice coil;

[0027] Figure 4 This is a schematic diagram of the magnet structure of the embodiment of the utility model adapted to the second type of voice coil;

[0028] Figure 5 This is an exploded view of the first type of voice coil loudspeaker used in the embodiment of the present utility model;

[0029] Figure 6 This is an internal top view of the first type of voice coil loudspeaker used in an embodiment of the present utility model;

[0030] Figure 7 This is a cross-sectional view of the first voice coil loudspeaker used in the embodiment of the present utility model;

[0031] Figure 8 This is an exploded view of the second type of voice coil loudspeaker used in the embodiment of the present utility model;

[0032] Figure 9 This is an internal top view of the second type of voice coil loudspeaker used in an embodiment of the present utility model;

[0033] Figure 10 This is a cross-sectional view of a second type of voice coil loudspeaker according to an embodiment of the present utility model;

[0034] Figure 11 is Figure 5 a simulated color map of the magnetic field strength of the loudspeaker shown in

[0035] Figure 12 is Figure 5 the frequency response curve graph of the loudspeaker shown in

[0036] In the figure: 1 - voice coil; 11 - a part of the voice coil; 12 - the second part of the voice coil; 21 - concave part; 22 - convex part; 31 - central magnet; 32 - edge magnet; 33 - central magnetic conductive plate; 34 - magnetic gap; 35 - edge magnetic conductive plate; 4 - diaphragm; 5 - centering washer; 6 - yoke. Specific embodiments

[0037] The following combines the drawings and embodiments to further elaborate on the present utility model. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. It is undoubted that those of ordinary skill in the art can recognize that, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the drawings and descriptions are illustrative in nature and are not used to limit the protection scope of the claims.

[0038] As Figure 1 and Figure 2 shown, a voice coil is applied to a loudspeaker. The voice coil 1 is generally rectangular in shape. Inner concave parts 21 that are recessed towards the center of the voice coil 1 are provided on the four sides of the voice coil 1 respectively, or outer convex parts 22 that protrude away from the center of the voice coil 1 are provided on the four sides of the voice coil 1 respectively.

[0039] Furthermore, the inner concave part 21 or the outer convex part 22 is generally in a U - shaped. Specifically, the U - shaped inner concave part 21 or outer convex part 22 has three sides, two side edges and a bottom edge. The bottom edge is perpendicular to both side edges, and the two side edges are perpendicular to the rectangular side lines of the voice coil 1. In addition, the specific shape of the inner concave part 21 or the outer convex part 22 can also be transformed, for example, an arc transition is provided at the connection between the side edge and the bottom edge or the side edge and the bottom edge are set at an obtuse angle.

[0040] Furthermore, the inner concave part 21 or the outer convex part 22 is provided in the middle part of each side of the voice coil 1. As a preference, the voice coil 1 is generally of a central symmetry structure.

[0041] Furthermore, along the axial direction of the voice coil 1, the voice coil 1 includes a first part of the voice coil 11 and a second part of the voice coil 12. The wall thickness of the first part of the voice coil 11 is less than the wall thickness of the second part of the voice coil 12. The second part of the voice coil 12 is closer to the magnetic gap than the first part of the voice coil 11, so that the second part of the voice coil 12 with a larger wall thickness is located in the magnetic gap, improving the product performance.

[0042] like Figures 3 to 10 As shown, a loudspeaker includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm 4 and the voice coil 1 mentioned above. The magnetic circuit system includes a magnet adapted to the shape of the voice coil 1. The voice coil 1 is connected to the diaphragm 4.

[0043] Furthermore, the voice coil 1 is provided with an inwardly recessed inner recess 21, and the magnet includes a central magnet 31 and side magnets 32. The side magnets 32 are located on the periphery of the central magnet 31. The side magnets 32 and the central magnet 31 are spaced apart to form a magnetic gap 34. One end of the voice coil 1 extends into the magnetic gap 34. The central magnet 31 is generally rectangular, and the four sides of the central magnet 31 are recessed inwardly to fit into the inner recess 21 of the voice coil 1.

[0044] The magnetic circuit system further includes a central magnetic conductive plate 33 mounted on the central magnet 31 . The central magnetic conductive plate 33 is rectangular in shape as a whole. The four sides of the central magnetic conductive plate 33 are concave inwardly to match the inner concave portion 21 of the voice coil 1 .

[0045] Furthermore, it includes four side magnets 32, which are arranged around the central magnet 31, and the side magnets 32 face the side of the central magnet 31 and protrude outward and fit into the inner concave portion 21 of the voice coil 1; it also includes four side magnetic conductive plates 35 installed on the side magnets 32, and the side magnetic conductive plates 35 are arranged around the central magnetic conductive plate 33, and the side magnetic conductive plates 35 face the side of the central magnetic conductive plate 33 and protrude outward and fit into the inner concave portion 21 of the voice coil 1. 21 is adapted; or the side magnet 32 ​​is annular, and the side magnet 32 ​​is arranged around the central magnet 31, and the side magnet 32 ​​faces the side of the central magnet 31 to protrude outward and adapt to the inner recess 21 of the voice coil 1; and further includes an annular side magnetic conductive plate 35, and the annular side magnetic conductive plate 35 is arranged around the central magnetic conductive plate 33, and the side magnetic conductive plate 35 faces the side of the central magnetic conductive plate 33 to protrude outward and adapt to the inner recess 21 of the voice coil 1.

[0046] Furthermore, the voice coil 1 is provided with the outwardly protruding outer portion 22, and the magnet includes a central magnet 31, which is rectangular as a whole, and the four sides of the central magnet 31 protrude outward to adapt to the outward protrusion of the voice coil 1, and one end of the voice coil 1 extends to the outside of the central magnet 31 and is gap-fitted; it also includes a central magnetic conductive plate 33 installed on the central magnet 31, and the central magnetic conductive plate 33 is rectangular as a whole, and the four sides of the central magnetic conductive plate 33 protrude outward to adapt to the outward protrusion of the voice coil 1.

[0047] Furthermore, the loudspeaker further comprises a centering support 5, which is connected to the voice coil 1. The loudspeaker further comprises a yoke 6, on which the magnet is located, and an escape groove is provided at a position where the yoke 6 and the centering support 5 are opposite to each other.

[0048] Features of the technical solution of this patent application:

[0049] 1. Adopt special-shaped voice coil 1 design to increase the effective length of voice coil 1;

[0050] 2. The inner concave portion 21 or the outer convex portion of the special-shaped voice coil 1 is symmetrically distributed about the center of the unit;

[0051] 3. Regarding the special-shaped voice coil 1 design of the magnetic circuit component, a magnetic gap 34 is left between the voice coil 1 and the magnetic circuit to increase the magnetic circuit area, effectively improving the density of magnetic flux lines between the voice coil 1 and the magnetic circuit, thereby increasing the BL value. The BL value is the product of the magnetic field strength B and the length L of the voice coil 1 wire.

[0052] Beneficial effect: When the support space of the speaker is limited, a special-shaped voice coil 1 design is adopted to correspond to the magnet assembly of the magnetic circuit system and the attached design of the voice coil 1, thereby increasing the L value of the voice coil 1 (L value is the wire length of the voice coil 1) while increasing the magnet area, thereby significantly improving the performance of the whole machine and the loudness of the sound.

[0053] Adoption Figure 1 The speaker with voice coil 1 structure shown in FIG. Figure 5 The performance test is carried out as shown in the simulation diagram of the magnetic field intensity distribution. Figure 11 As shown in the simulation test, compared with the technical solution of conventional structure of voice coil 1, the actual simulation BL value increases by 6%, which is a significant improvement, thereby greatly improving the performance of the whole machine and the loudness of the sound effect. The frequency response curve of the speaker is shown in Figure 12 shown.

[0054] This technical solution only requires the control of the shape of the special-shaped voice coil 1 and the design of the magnetic circuit shape. It has obvious effects and is easy to implement. It can be promoted and used on mobile phones, tablets, laptops, and XR (extended reality) technology, and has strong scalability.

[0055] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A voice coil, used in a loudspeaker, characterized by: The voice coil is rectangular as a whole, and the four sides of the voice coil are respectively provided with inner concave portions sunken toward the center of the voice coil, or the four sides of the voice coil are respectively provided with outer convex portions protruding away from the center of the voice coil.

2. The voice coil according to claim 1, wherein: The inner concave portion or the outer convex portion is in a U-shape as a whole.

3. The voice coil according to claim 1, wherein: The inner concave portion or the outer convex portion is provided at the middle portion of each side of the voice coil.

4. The voice coil according to claim 1, wherein: Along the axial direction of the voice coil, the voice coil includes a first voice coil portion and a second voice coil portion, and the wall thickness of the first voice coil portion is smaller than the wall thickness of the second voice coil portion.

5. A loudspeaker, characterized in that: The loudspeaker includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and the voice coil according to any one of claims 1 to 4. The magnetic circuit system includes a magnet adapted to the shape of the voice coil. The voice coil is connected to the diaphragm.

6. The loudspeaker according to claim 5, characterized in that: The voice coil is provided with an inwardly concave portion, the magnet includes a central magnet and side magnets, the side magnets are located on the periphery of the central magnet, the side magnets and the central magnet are spaced apart to form a magnetic gap, and one end of the voice coil extends into the magnetic gap; the central magnet is generally rectangular, and the four sides of the central magnet are concave inwardly to adapt to the concave portion of the voice coil; The magnetic circuit system further includes a central magnetic conductive plate installed on the central magnet. The central magnetic conductive plate is rectangular in shape as a whole. The four sides of the central magnetic conductive plate are concave inwardly to match the inner concave portion of the voice coil.

7. The loudspeaker according to claim 6, wherein: The invention comprises four side magnets, the side magnets being arranged around the central magnet, the side of the side magnets facing the central magnet protruding outwards and fitting into the inner concave portion of the voice coil; and four side magnetic conductive plates mounted on the side magnets, the side magnetic conductive plates being arranged around the central magnetic conductive plate, the side magnetic conductive plates facing the central magnetic conductive plate protruding outwards and fitting into the inner concave portion of the voice coil. Alternatively, the side magnet is annular, and the side magnet is arranged around the center magnet, and the side magnet facing the center magnet protrudes outward and adapts to the inner recess of the voice coil; it also includes an annular side magnetic conductive plate, and the annular side magnetic conductive plate is arranged around the center magnetic conductive plate, and the side magnetic conductive plate facing the center magnetic conductive plate protrudes outward and adapts to the inner recess of the voice coil.

8. The loudspeaker according to claim 5, wherein: The voice coil is provided with an outwardly protruding portion, and the magnet includes a central magnet, which is rectangular as a whole, and the four sides of the central magnet protrude outward to adapt to the outwardly protruding portion of the voice coil. One end of the voice coil extends to the outside of the central magnet and is gap-fitted; and further includes a central magnetic conductive plate installed on the central magnet, which is rectangular as a whole, and the four sides of the central magnetic conductive plate protrude outward to adapt to the outwardly protruding portion of the voice coil.

9. The loudspeaker according to any one of claims 5 to 8, characterized in that: It also includes a centering support plate, which is connected to the voice coil.

10. The loudspeaker according to claim 9, characterized in that: It also includes a magnetic yoke, the magnet is located on the magnetic yoke, and an avoidance groove is provided at a position where the magnetic yoke is opposite to the centering support piece.

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