sound production unit

Abstract

The utility model discloses a sound unit, including diaphragm subassembly, magnetic circuit subassembly and bending voice coil, magnetic circuit subassembly includes two side magnetic structures of opposite setting, and the magnetic gap is formed between two side magnetic structures, bending voice coil has the first long axis side and the second long axis side through the short shaft side connection, and the short shaft side of bending voice coil is right angle shape, and the first long axis side of bending voice coil stretches into the magnetic gap, and the second long axis side connects diaphragm subassembly. The utility model discloses a sound unit simple novel structure, adopts bending voice coil cooperation two magnetic circuit system, has saved the center magnetic structure, makes the sound unit whole occupation space become smaller, makes the sound unit can realize miniaturization, and bending voice coil only first long side stretches into the magnetic gap, therefore the part of bending voice coil in the magnetic gap can realize the cutting of the magnetic induction line in the magnetic gap, thereby drives diaphragm subassembly vibration, and the second long axis side of bending voice coil and diaphragm subassembly face contact, has greater combination area, is favorable to guarantee the stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular 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 space reserved for the installation of sound units is getting smaller and smaller. How to miniaturize the sound units to adapt to increasingly thinner and lighter mobile terminal products is a problem that designers urgently need to solve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a miniature sound-generating unit.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising: A magnetic circuit assembly, the magnetic circuit assembly including two lateral magnetic structures disposed opposite each other, with a magnetic gap formed between the two lateral magnetic structures; Diaphragm assembly; A bent voice coil has a first long axis and a second long axis connected by a short axis. The short axis of the bent voice coil is right-angled. The first long axis of the bent voice coil extends into a magnetic gap, and the second long axis is connected to a diaphragm assembly.

[0006] Furthermore, the number of bent voice coils is two, the two bent voice coils are arranged symmetrically in a plane, and the second major axis sides of the two bent voice coils are far apart from each other.

[0007] Furthermore, the first long axis edges of the two bent voice coils are bonded and fixed.

[0008] Furthermore, the top surface of the first long axis side is set lower than the bottom surface of the second long axis side.

[0009] Furthermore, the length of the lateral magnetic structure is greater than or equal to the length of the first long axis side of the bent voice coil.

[0010] Furthermore, it also includes a basin frame, the diaphragm assembly and the magnetic circuit assembly are respectively connected to the basin frame, and the basin frame has a clearance groove for avoiding a portion of the lateral magnetic structure.

[0011] Furthermore, the magnetic circuit assembly also includes a yoke, and the lateral magnetic structure is disposed on the yoke.

[0012] Furthermore, the lateral magnetic structure includes a lateral magnet and a lateral washer, with the top surface of the lateral magnet connected to the lateral washer and the bottom surface of the lateral magnet connected to the yoke.

[0013] Furthermore, the side washers located on both sides of the first long axis are connected by connecting arms to form an integral structure.

[0014] Furthermore, the magnetic circuit assembly also includes two oppositely arranged end magnetic structures, which are arranged corresponding to the magnetic gap. Each end magnetic structure includes an end magnet and an end washer. The top surface of the end magnet is connected to the end washer, the bottom surface of the end magnet is connected to the yoke, and the end washer is connected to the connecting arm.

[0015] The beneficial effects of this utility model are as follows: The sound generating unit has a simple and novel structure, adopting a bent voice coil in conjunction with a two-magnetic-circuit system, eliminating the need for a central magnetic structure, making the overall space occupied by the sound generating unit smaller, and enabling the sound generating unit to be miniaturized; only the first long side of the bent voice coil extends into the magnetic gap, so the part of the bent voice coil in the magnetic gap can cut the magnetic field lines in the magnetic gap, thereby driving the diaphragm assembly to vibrate; the second long axis of the bent voice coil contacts the diaphragm assembly surface, having a large contact area, which is beneficial to ensuring the stability of the connection between the bent voice coil and the diaphragm assembly. At the same time, the second long axis can also improve the rigidity of the diaphragm assembly to a certain extent. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the sound-generating unit; Figure 2 This is a cross-sectional view of the sound-generating unit; Figure 3 A schematic diagram of part of the sound-generating unit; Figure 4 This is a schematic diagram of the bent voice coil in the sound-generating unit; Figure 5 A bottom view of the sound-generating unit with the yoke hidden.

[0017] Label Explanation: 1. Sink rack; 11. Clearance groove; 2. Magnetic circuit assembly; 21. Yoke; 22. Lateral magnetic structure; 221. Lateral magnet; 222. Lateral washer; 23. Magnetic gap; 24. Connecting arm; 25. End magnetic structure; 251. End magnet; 252. End washer; 3. Diaphragm assembly; 4. Bending voice coil; 41. Short axis side; 42. First long axis side; 43. Second long axis side; 44. Top surface of the first long axis side; 45. Bottom surface of the second long axis side. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Please refer to Figures 1 to 3 The sound-generating unit includes a magnetic circuit assembly 2, a diaphragm assembly 3, and a bent voice coil 4. The magnetic circuit assembly 2 includes two lateral magnetic structures 22 arranged opposite each other, forming a magnetic gap 23 between the two lateral magnetic structures 22. The bent voice coil 4 has a first long axis side 42 and a second long axis side 43 connected by a short axis side 41. The short axis side 41 of the bent voice coil 4 is right-angled. The first long axis side 42 of the bent voice coil 4 extends into the magnetic gap 23, and the second long axis side 43 is connected to the diaphragm assembly 3.

[0020] As can be seen from the above description, the beneficial effects of this utility model are as follows: The sound generating unit has a simple and novel structure. It adopts a bent voice coil 4 in conjunction with a two-magnetic-circuit system, which eliminates the central magnetic structure, making the overall space occupied by the sound generating unit smaller and enabling the sound generating unit to be miniaturized; only the first long side of the bent voice coil 4 extends into the magnetic gap 23, so the part of the bent voice coil 4 in the magnetic gap 23 can cut the magnetic field lines in the magnetic gap 23, thereby driving the diaphragm assembly 3 to vibrate; the second long axis side 43 of the bent voice coil 4 is in contact with the diaphragm assembly 3, and has a large contact area, which is beneficial to ensuring the stability of the connection between the bent voice coil 4 and the diaphragm assembly 3. At the same time, the second long axis side 43 can also improve the rigidity of the diaphragm assembly 3 to a certain extent.

[0021] like Figure 2 and Figure 3 As shown, further, there are two bent voice coils 4, which are arranged symmetrically in a plane, and the second major axis sides 43 of the two bent voice coils 4 are far apart from each other.

[0022] As can be seen from the above description, the two symmetrically arranged bent voice coils 4 of the sound-generating unit are beneficial to balancing the force on the diaphragm assembly 3, thereby improving the polarization phenomenon of the diaphragm assembly 3 and ensuring the acoustic performance of the sound-generating unit.

[0023] like Figure 2 and Figure 3 As shown, furthermore, the first long axis edges 42 of the two bent voice coils 4 are bonded and fixed.

[0024] As can be seen from the above description, the two bent voice coils 4 are bonded and fixed by the first long shaft edge 42, which helps to improve the structural stability of the sound unit and avoids the two first long shaft edges 42 colliding with each other and emitting noise during the operation of the sound unit.

[0025] like Figure 2 and Figure 4As shown, the top surface 44 of the first long axis side is set lower than the bottom surface 45 of the second long axis side.

[0026] As can be seen from the above description, the short axis side 41 of the bent voice coil 4 plays the role of a skeleton, which allows the first long axis side 42 to penetrate deeper into the magnetic gap 23, thereby increasing the effective line length of the bent voice coil 4 in the magnetic gap 23, improving the BL value of the sound unit, and helping to improve the performance of the sound unit.

[0027] like Figure 3 As shown, further, the length of the lateral magnetic structure 22 is greater than or equal to the length of the first long axis side 42 of the bent voice coil 4.

[0028] As can be seen from the above description, the length of the side magnetic structure 22 is not less than the length of the first long axis side 42, which allows more of the first long axis side 42 to be in the magnetic gap 23, thereby ensuring the driving force of the bent voice coil 4 on the diaphragm assembly 3.

[0029] like Figure 1 and Figure 2 As shown, it further includes a basin frame 1, the diaphragm assembly 3 and the magnetic circuit assembly 2 are respectively connected to the basin frame 1, and the basin frame 1 has a clearance groove 11 for avoiding a portion of the side magnetic structure 22.

[0030] As can be seen from the above description, the presence of the clearance groove 11 allows the side magnetic structure 22 to be set larger, thereby increasing the BL value of the sound-generating unit.

[0031] like Figure 1 and Figure 2 As shown, the magnetic circuit assembly 2 further includes a yoke 21, and the lateral magnetic structure 22 is disposed on the yoke 21.

[0032] As can be seen from the above description, the yoke 21 can play a magnetic guiding role, which is conducive to improving the magnetic utilization rate.

[0033] like Figure 1 and Figure 2 As shown, the lateral magnetic structure 22 further includes a lateral magnet 221 and a lateral washer 222. The top surface of the lateral magnet 221 is connected to the lateral washer 222, and the bottom surface of the lateral magnet 221 is connected to the yoke 21.

[0034] As can be seen from the above description, the side washer 222 can play a magnetic guiding role, causing the magnetic field lines to converge toward the magnetic gap 23, which is beneficial to improve the magnetic utilization rate of the sound unit.

[0035] like Figure 3 As shown, the side washer 222 located on both sides of the first long axis edge 42 are connected by connecting arms 24 to form an integral structure.

[0036] As can be seen from the above description, the two side washer 222s adopt an integrated structure, which facilitates the assembly of the sound unit.

[0037] like Figure 1 , Figure 3 and Figure 5 As shown, the magnetic circuit assembly 2 further includes two oppositely arranged end magnetic structures 25, which are arranged corresponding to the magnetic gap 23. The end magnetic structure 25 includes an end magnet 251 and an end washer 252. The top surface of the end magnet 251 is connected to the end washer 252, and the bottom surface of the end magnet 251 is connected to the yoke 21. The end washer 252 is connected to the connecting arm 24.

[0038] As can be seen from the above description, the setting of the end magnetic structure 25 can greatly improve the BL value of the sound unit, thereby improving the performance of the sound unit.

[0039] Embodiment 1 of this utility model is as follows: Please refer to Figures 1 to 3 The sound-generating unit includes a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, and a bent voice coil 4. The magnetic circuit assembly 2 and the diaphragm assembly 3 are respectively connected to the frame 1. The magnetic circuit assembly 2 includes a yoke 21 and two opposing lateral magnetic structures 22. The lateral magnetic structures 22 are fixed on the yoke 21, and a magnetic gap 23 is formed between the two lateral magnetic structures 22. The bent voice coil 4 has a first long axis side 42 and a second long axis side 43 connected by a short axis side 41. The short axis side 41 of the bent voice coil 4 is right-angled. The first long axis side 42 of the bent voice coil 4 extends into the magnetic gap 23, and the second long axis side 43 is connected to the diaphragm assembly 3.

[0040] Please refer to Figure 4 In the actual manufacturing of the bent voice coil 4, the bent voice coil 4 can be obtained by bending the short axis edge 41 of the planar voice coil at 90°.

[0041] Please refer to Figure 2 and Figure 3 The number of bent voice coils 4 is two, and the two bent voice coils 4 are arranged symmetrically in a plane. The second long axis edges 43 of the two bent voice coils 4 are far apart from each other. Preferably, the first long axis edges 42 of the two bent voice coils 4 are bonded and fixed together. It should be noted that after the two bent voice coils 4 are energized, the current flowing through the first long axis edges 42 of the two bent voice coils 4 flows in the same direction.

[0042] Please refer to Figure 2 and Figure 4In one or more embodiments, the top surface 44 of the first long axis side is set lower than the bottom surface 45 of the second long axis side, so that the first long axis side 42 can be inserted deeper into the magnetic gap 23.

[0043] Please refer to Figure 3 and Figure 5 The length of the lateral magnetic structure 22 is greater than or equal to the length of the first long axis side 42 of the bent voice coil 4.

[0044] Please refer to Figure 1 and Figure 2 In order to allow the volume of the side magnetic structure 22 to be larger, in this embodiment, the basin stand 1 has a relief groove 11 for avoiding a portion of the side magnetic structure 22. The end of the side magnetic structure 22 away from the magnetic gap 23 is located in the relief groove 11 and is bonded and fixed to the basin stand 1.

[0045] Please refer to Figure 1 and Figure 2 Specifically, the lateral magnetic structure 22 includes a lateral magnet 221 and a lateral washer 222. The top surface of the lateral magnet 221 is connected to the lateral washer 222, and the bottom surface of the lateral magnet 221 is connected to the yoke 21.

[0046] Please refer to Figure 3 Optionally, the side washer 222 located on both sides of the first long axis edge 42 are connected by connecting arms 24 to form an integral structure.

[0047] Please refer to Figure 1 , Figure 3 and Figure 5 Where the dimensions of the sound-generating unit allow, in some embodiments, the magnetic circuit assembly 2 further includes two oppositely arranged end magnetic structures 25, the end magnetic structures 25 being arranged corresponding to the magnetic gap 23, the end magnetic structures 25 including end magnets 251 and end washer 252, the top surface of the end magnets 251 being connected to the end washer 252, the bottom surface of the end magnets 251 being connected to the yoke 21, and the end washer 252 being connected to the connecting arm 24.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that, include A magnetic circuit assembly, the magnetic circuit assembly including two lateral magnetic structures disposed opposite each other, with a magnetic gap formed between the two lateral magnetic structures; Diaphragm assembly; A bent voice coil has a first long axis and a second long axis connected by a short axis. The short axis of the bent voice coil is right-angled. The first long axis of the bent voice coil extends into a magnetic gap, and the second long axis is connected to a diaphragm assembly.

2. The sound-generating unit according to claim 1, characterized in that, The number of bent voice coils is two, and the two bent voice coils are arranged symmetrically in a plane, with the second major axis sides of the two bent voice coils being far apart from each other.

3. The sound-generating unit according to claim 2, characterized in that, The first long axis edges of the two bent voice coils are bonded and fixed.

4. The sound-generating unit according to claim 1, characterized in that, The top surface of the first long axis is set lower than the bottom surface of the second long axis.

5. The sound-generating unit according to claim 1, characterized in that, The length of the lateral magnetic structure is greater than or equal to the length of the first long axis of the bent voice coil.

6. The sound-generating unit according to claim 1, characterized in that, It also includes a basin frame, the diaphragm assembly and the magnetic circuit assembly are respectively connected to the basin frame, and the basin frame has a clearance groove for avoiding a portion of the lateral magnetic structure.

7. The sound-generating unit according to claim 1, characterized in that, The magnetic circuit assembly also includes a yoke, and the lateral magnetic structure is disposed on the yoke.

8. The sound-generating unit according to claim 7, characterized in that, The lateral magnetic structure includes a lateral magnet and a lateral washer, with the top surface of the lateral magnet connected to the lateral washer and the bottom surface of the lateral magnet connected to the yoke.

9. The sound-generating unit according to claim 8, characterized in that, The side washers located on both sides of the first long axis are connected by connecting arms to form an integral structure.

10. The sound-generating unit according to claim 9, characterized in that, The magnetic circuit assembly further includes two opposing end magnetic structures, which are arranged corresponding to the magnetic gap. Each end magnetic structure includes an end magnet and an end washer. The top surface of the end magnet is connected to the end washer, and the bottom surface of the end magnet is connected to the yoke. The end washer is connected to the connecting arm.

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