Sound production unit

Abstract

The invention discloses a sound production unit which comprises a yoke, a linear conductor, a vibrating diaphragm assembly and a pair of lateral magnetic assemblies, the lateral magnetic assemblies are arranged on the yoke, and a magnetic gap is formed between the two lateral magnetic assemblies; the linear conductor is at least partially accommodated in the magnetic gap; the diaphragm assembly is connected with the linear conductor. The sound production unit is simple and novel in structure, the linear conductor is adopted to drive the diaphragm assembly to vibrate and produce sound, and compared with a ring-frame-shaped voice coil structure, the linear conductor greatly reduces the occupation of the internal space of the sound production unit, so that the overall volume of the sound production unit can be smaller; more importantly, compared with a traditional sound production unit, the arrangement of a central magnetic assembly is omitted, and the space occupied by the magnetic circuit assembly of the sound production unit is greatly reduced, so that the overall size of the sound production unit can be made smaller, and the sound production unit can better meet the development trend of lightening and thinning of mobile terminal products.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic converter technology, and more particularly to a sound-generating unit. Background Technology

[0002] Nowadays, mobile devices such as smartphones and tablets enrich people's lives, and the sound unit plays an indispensable role as an audio device.

[0003] As mobile terminal products become smaller, the installation space reserved for the sound unit is getting smaller and smaller. The existing sound units are generally three-magnetic circuit architecture or five-magnetic circuit architecture. The three-magnetic circuit architecture / five-magnetic circuit architecture is inherently large, which directly leads to the inability to make the sound unit smaller. Therefore, how to miniaturize the sound unit to adapt to increasingly thinner and lighter mobile terminal products is a problem that designers urgently need to solve. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a miniature sound generating unit with a smaller magnetic circuit component.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a sound-generating unit, comprising: Yoke; A pair of lateral magnetic assemblies are disposed on the yoke, and a magnetic gap is formed between the two lateral magnetic assemblies; A linear conductor, at least partially housed within the magnetic gap; A diaphragm assembly that connects to the linear conductor.

[0006] The beneficial effects of this invention are as follows: The sound-generating unit has a simple and novel structure, and uses a linear conductor to drive the diaphragm assembly to vibrate and generate sound. Compared with the ring-shaped voice coil structure, the linear conductor occupies a much smaller space inside the sound-generating unit, making the overall volume of the sound-generating unit smaller. More importantly, compared with traditional sound-generating units, the central magnetic component is eliminated, forming a two-magnetic-circuit architecture, which greatly reduces the space required for the magnetic circuit components of the sound-generating unit, thereby making the overall volume of the sound-generating unit smaller, which better meets the development trend of thinner and lighter mobile terminal products. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of the sound-generating unit in Embodiment 1; Figure 2 This is a cross-sectional view of the sound-generating unit in Embodiment 1; Figure 3 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1; Figure 4 This is an exploded view of the linear conductor in the sound-generating unit of Embodiment 1; Figure 5 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 2.

[0008] Label Explanation: 1. Pot stand; 11. Avoidance window; 2. Yoke; 3. Side magnetic assembly; 31. Side magnet; 32. Side washer; 4. Linear conductor; 41. Inner conductor; 411. Guide wire; 42. Outer sheath; 421. Elevated section; 43. Bending section; 5. Diaphragm assembly; 51. Inner fixing part; 52. Folded ring part; 53. Outer fixing part; 6. Magnetic gap; 7. Centering support; 71. Internal mounting part; 72. Cantilever part; 73. External mounting part. Detailed Implementation

[0009] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0010] Please refer to Figures 1 to 3 The sound-generating unit includes a yoke 2, a linear conductor 4, a diaphragm assembly 5, and a set of side magnetic assemblies 3. The side magnetic assemblies 3 are disposed on the yoke 2, and a magnetic gap 6 is formed between two of the side magnetic assemblies 3. The linear conductor 4 is at least partially housed in the magnetic gap 6. The diaphragm assembly 5 is connected to the linear conductor 4.

[0011] As can be seen from the above description, the beneficial effects of the present invention are as follows: The sound-generating unit has a simple and novel structure, and uses a linear conductor 4 to drive the diaphragm assembly 5 to vibrate and generate sound. Compared with the ring-shaped voice coil structure, the linear conductor 4 occupies a much smaller space inside the sound-generating unit, making the overall volume of the sound-generating unit smaller. More importantly, compared with the traditional sound-generating unit, the central magnetic assembly is eliminated, forming a two-magnetic circuit architecture, which greatly reduces the space required by the magnetic circuit assembly of the sound-generating unit, thereby making the overall volume of the sound-generating unit smaller, which can better meet the development trend of thinner and lighter mobile terminal products.

[0012] Please refer to Figure 2 and Figure 3 Furthermore, the sound-generating unit has a planar symmetrical structure.

[0013] As can be seen from the above description, the sound-generating unit has a planar symmetrical structure, which can ensure the force balance of the diaphragm assembly 5 and improve the polarization phenomenon of the sound-generating unit.

[0014] Please refer to Figure 1 and Figure 2Furthermore, the side magnetic assembly 3 includes a side magnet 31 and a side washer 32. The side magnet 31 is located below the side washer 32, and the side magnet 31 connects the side washer 32 and the yoke 2.

[0015] As described above, the presence of the side washer 32 can guide the magnetic field lines to the magnetic gap 6, thereby improving the utilization rate of magnetic force and enhancing the performance of the sound unit.

[0016] Please refer to Figures 2 to 4 Furthermore, the linear conductor 4 includes an inner conductor 41 and an outer sheath 42 covering the inner conductor 41.

[0017] As can be seen from the above description, the linear conductor 4 has a simple structure and is easy to manufacture.

[0018] Please refer to Figure 2 and Figure 4 Furthermore, the inner conductor 41 includes multiple guide wires 411 connected in parallel.

[0019] As can be seen from the above description, there are a variety of possible structural forms for the inner conductor 41.

[0020] Please refer to Figure 2 Furthermore, the two adjacent guide wires 411 are staggered.

[0021] As can be seen from the above description, the staggered arrangement of the two adjacent conductors 411 can improve the phenomenon of concentrated heat generation in the linear conductor 4.

[0022] Please refer to Figure 2 and Figure 3 Furthermore, the linear conductor 4 is in multiple groups, and adjacent groups of linear conductor 4 are bonded together.

[0023] As can be seen from the above description, when there are multiple sets of linear conductors 4, the mutual bonding of two adjacent sets of linear conductors 4 can improve the structural stability of the sound-generating unit and reduce the risk of the linear conductors 4 detaching from the diaphragm assembly 5.

[0024] Please refer to Figure 1 and Figure 3 Furthermore, it also includes a basin frame 1 and a centering support 7, wherein the centering support 7 connects the linear conductor 4 to the basin frame 1, and the diaphragm assembly 5 is connected to the basin frame 1.

[0025] As can be seen from the above description, the centering support 7 can correct the polarization of the linear conductor 4, thereby improving the polarization phenomenon of the sound-generating unit.

[0026] Please refer to Figure 1 and Figure 2Furthermore, the basin stand 1 has a clearance window 11, in which a portion of the side magnetic assembly 3 is accommodated.

[0027] As can be seen from the above description, the fact that a portion of the side magnetic component 3 is housed in the clearance window 11 allows the volume of the side magnetic component 3 to be set larger, thereby increasing the BL value of the sound-generating unit and improving the performance of the sound-generating unit.

[0028] Please refer to Figure 5 Furthermore, the linear conductor 4 is in two sets, and the ends of the two sets of linear conductor 4 are bent and extended in a direction away from each other to form a curved portion 43. The ends of the curved portion 43 are welded to the centering support piece 7 for conduction.

[0029] As can be seen from the above description, the presence of the bend 43 facilitates the welding and connection of the two sets of linear conductors 4 and the centering support 7.

[0030] One embodiment of the present invention is a sound-generating unit, which is particularly suitable for use in thin and light terminal devices such as mobile phones, tablets, smartwatches, and AR glasses.

[0031] Please refer to Figures 1 to 3 The sound-generating unit includes a frame 1, a yoke 2, a linear conductor 4, a diaphragm assembly 5, and a pair of lateral magnetic assemblies 3. The diaphragm assembly 5 includes an inner fixing part 51, a folded ring part 52, and an outer fixing part 53 connected sequentially from the inside to the outside. The linear conductor 4 is connected to the inner fixing part 51, and the outer fixing part 53 is connected to the frame 1. The lateral magnetic assemblies 3 are fixed on the yoke 2, and the two lateral magnetic assemblies 3 are arranged opposite to each other. A magnetic gap 6 is formed between the two lateral magnetic assemblies 3 to allow the linear conductor 4 to move. That is, the linear conductor 4 is at least partially housed in the magnetic gap 6.

[0032] One end of the linear conductor 4 is connected to the positive terminal of an external power source, and the other end is connected to the negative terminal of an external power source. After the linear conductor 4 is connected to an AC power source, it generates an alternating magnetic field. This alternating magnetic field is superimposed and canceled by the fixed magnetic field formed by the two side magnetic components 3, thereby driving the linear conductor 4 to drive the diaphragm component 5 to vibrate and thus initiating the air to produce sound.

[0033] like Figure 2 and Figure 3 As shown, in order to make the diaphragm assembly 5 more balanced in terms of force, preferably, the sound-generating unit has a planar symmetrical structure.

[0034] like Figure 2 As shown, specifically, the side magnetic assembly 3 includes a side magnet 31 and a side washer 32. The side magnet 31 is located below the side washer 32, and the side magnet 31 connects the side washer 32 and the yoke 2.

[0035] Please combine Figures 2 to 4 The linear conductor 4 includes an inner conductor 41 and an outer sheath 42 covering the inner conductor 41. In some embodiments, the inner conductor 41 can be a single integral metal sheet, while in other embodiments, the inner conductor 41 includes multiple parallel guide wires 411, with the ends of any two guide wires 411 interconnected to form a parallel connection. Optionally, two adjacent guide wires 411 are staggered. In some embodiments, the outer sheath 42 has a raised section 421, which does not contain the guide wires 411. The raised section 421 acts as a skeleton, allowing more guide wires 411 to penetrate into the magnetic gap 6, thereby improving magnetic utilization and enhancing the performance of the sound-generating unit. Furthermore, no additional skeleton is required, thus further simplifying the structure of the sound-generating unit and making it easier to assemble and manufacture.

[0036] like Figure 2 and Figure 3 As shown, in one or more embodiments, the number of linear conductors 4 is multiple sets, and adjacent sets of linear conductors 4 are bonded together. Specifically, adjacent sets of linear conductors 4 can be bonded by adhesive, by double-sided adhesive, or by an adhesive layer on the outer surface of the outer sheath 42. In this embodiment, the number of linear conductors 4 is two sets, and the two sets of linear conductors 4 are arranged side by side.

[0037] Please combine Figure 1 and Figure 3 Optionally, the sound-generating unit further includes a centering support 7, which connects the linear conductor 4 to the frame 1. The centering support 7 includes an inner mounting portion 71, a cantilever portion 72, and an outer mounting portion 73 connected in sequence. The outer mounting portion 73 is connected to the frame 1, and the inner mounting portion 71 is connected to the linear conductor 4. In one or more embodiments, the inner mounting portion 71 is provided with an inner solder pad, and the outer mounting portion 73 is provided with an outer solder pad electrically connected to the inner solder pad. The sound-generating unit is electrically connected to an external power supply through the centering support 7, and the linear conductor 4 is soldered to the inner solder pad for conductivity.

[0038] like Figure 1 and Figure 2 As shown, in order to allow the side magnetic component 3 to be set to a larger volume, the basin stand 1 has a clearance window 11, and a part of the side magnetic component 3 is accommodated in the clearance window 11.

[0039] Please refer to Figure 5The second embodiment of the present invention is a parallel technical solution to the first embodiment. The difference between the two embodiments is that the ends of the two sets of linear conductors 4 are bent and extended in a direction away from each other to form a bent portion 43. The end of the bent portion 43 is welded and connected to the centering support piece 7. The setting of the bent portion 43 can facilitate the welding and connection between the linear conductor 4 and the centering support piece 7, and effectively improve the phenomenon of false welding or spurious welding between the linear conductor 4 and the centering support piece 7 due to the excessive width of the linear conductor 4.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sound emitting unit, characterized by, Comprising a yoke iron; a pair of side magnetic assemblies arranged on the yoke iron, a magnetic gap being formed between the two side magnetic assemblies; a linear conductor at least partially accommodated in the magnetic gap; a diaphragm assembly connected to the linear conductor.

2. The sound producing unit of claim 1, wherein, The side magnetic assembly comprises a side magnetic steel and a side field system, the side magnetic steel being located below the side field system, and the side magnetic steel connecting the side field system and the yoke iron.

3. The sound producing unit of claim 1, wherein, The linear conductor comprises an inner conductor and an outer skin covering the inner conductor.

4. The sound producing unit of claim 3, wherein, The inner conductor comprises a plurality of parallel wires.

5. The sound producing unit of claim 4, wherein, Two adjacent wires are arranged in a staggered manner.

6. The sound producing unit of claim 3, wherein, The number of linear conductors is multiple groups, and adjacent linear conductors are bonded to each other.

7. The sound producing unit of claim 1, wherein, Further comprising a yoke and a centering sheet, the centering sheet connecting the linear conductor and the yoke, and the diaphragm assembly connecting the yoke.

8. The sound producing unit of claim 7, wherein, The yoke has an avoidance window, and a part of the side magnetic assembly is accommodated in the avoidance window.

9. The sound producing unit of claim 7, wherein, The number of linear conductors is two groups, the end portions of the two groups of linear conductors are bent and extended in directions away from each other to form a bending portion, and the end portions of the bending portion are welded and connected to the centering sheet.

10. The sound producing unit of claim 1, wherein, The sound generating unit is a planar symmetric structure.

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