Sound production unit

Abstract

The utility model discloses a sounding unit, including basin stand, magnetic circuit subassembly, diaphragm subassembly and centering disk, magnetic circuit subassembly and diaphragm subassembly are respectively connected basin stand, magnetic circuit subassembly includes yoke, side magnetic structure and central magnetic part, each group central magnetic part includes two groups central magnetic structure that are arranged at interval, the central magnetic structure and the side magnetic structures are respectively and fixedly arranged on the yoke, the central magnetic structure is provided with an accommodating cavity communicated with the top surface of the central magnetic structure, and a boss is arranged on the yoke and is positioned in the accommodating cavity; the diaphragm assembly is provided with a plurality of rectangular voice coils, and the rectangular voice coils and the central magnetic structures are arranged in a one-to-one correspondence manner. Each group of central magnetic parts respectively correspond to a centering support chip, the centering support chip comprises a middle part and a settlement part, the middle part is arranged corresponding to the mutually close long-axis sides of the two rectangular voice coils corresponding to the same group of central magnetic parts, the length direction of the middle part is consistent with the length direction of the long-axis sides of the rectangular voice coils, and the end part of the middle part is positioned on the outer side of the voice coil. The sounding unit is novel in structure and excellent in performance.

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] To further improve the utilization rate of magnets, provide stronger driving force, enhance the sensitivity of the sound unit, and increase loudness, multi-voice coil architecture sound units have appeared on the market.

[0003] However, in order to improve the performance of the driver unit, existing drivers mostly adopt a large voice coil and a large amplitude architecture design. Some drivers also have a conductive centering support. The conductive centering support has the function of connecting the voice coil to the external power supply and correcting the voice coil to improve the voice coil rolling vibration. In the existing technology, the conductive centering support is generally located outside the voice coil. When the driver unit adopts a large amplitude design, the conductive centering support must have sufficient suspension length to avoid stress concentration and wire breakage. However, in drivers with a large voice coil architecture, there is not enough space left outside the voice coil, so it is impossible to place the side magnet or the conductive centering support, resulting in the inability to further improve the performance. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance sound unit with a multi-voice coil architecture.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0006] Sink stand;

[0007] A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly includes a yoke, a side magnetic structure, and at least one set of central magnetic parts. Each set of central magnetic parts includes two sets of spaced-apart central magnetic structures. The central magnetic structures and the side magnetic structures are respectively fixed on the yoke. The central magnetic structure has a receiving cavity communicating with its top surface. The yoke is provided with a boss located in the receiving cavity.

[0008] A diaphragm assembly is connected to the frame, and the diaphragm assembly is provided with a plurality of rectangular voice coils, each of which is arranged in a one-to-one correspondence with the central magnetic structure;

[0009] A centering support is provided for each group of central magnetic parts. Each centering support includes a middle part and a settling part. The middle part is positioned on the long axis of two rectangular voice coils that are close to each other and are associated with the central magnetic parts of the same group. The length direction of the middle part is consistent with the length direction of the long axis of the rectangular voice coil. The end of the middle part is located outside the voice coil. The end of the middle part is provided with a first conductive pad that is connected to the voice coil. The two sides of the middle part are respectively connected to the settling part. The two settling parts are located in the receiving cavities of different central magnetic structures of the same group of central magnetic parts. The settling part includes a raised part, a cantilever part and a fixed part connected in sequence. The fixed part is fixed to the boss. The middle part is fixed to the diaphragm assembly. The centering support is provided with a conductive line that is connected to the first conductive pad. An external power supply is connected to the rectangular voice coil through the conductive line.

[0010] In one embodiment, the middle portion is fixedly connected to the two rectangular voice coils located below it.

[0011] In one embodiment, the length of the middle portion is greater than the length of the major axis of the rectangular voice coil, and the end of the middle portion protrudes relative to the end of the voice coil.

[0012] In one embodiment, the side magnet structure includes a side washer and a plurality of side magnets. The side magnets connect the side washer to the yoke. The side washer is connected to the frame. The plurality of side magnets are arranged in a ring frame structure. The central magnet is located within the ring frame structure. The side magnets are respectively provided on the outer sides of the ends of the two rectangular voice coils corresponding to the same group of central magnets. The magnetic poles of the two side magnets face opposite directions. A gap is formed between the two side magnets, corresponding to the gap between two adjacent rectangular voice coils. The gap constitutes a clearance space for avoiding the ends of the middle part.

[0013] In one embodiment, the diaphragm assembly includes a cover plate, a dome, and a diaphragm disposed around the dome. The diaphragm is connected to the frame. The dome has an opening with a downwardly extending support arm along its edge. The support arm is disposed near the frame and contacts one end of the cantilever that is connected to the frame. The cover plate is disposed on the dome and closes the opening.

[0014] In one embodiment, the two settling portions in the centering support form a symmetrical structure.

[0015] In one embodiment, the number of cantilever sections in the settling section is one or more.

[0016] In one embodiment, connecting portions are respectively connected to both sides of the middle portion, the middle portion is connected to the elevated portion through the connecting portions, and the top surface of the central magnetic structure is provided with a clearance groove for avoiding the middle portion.

[0017] In one embodiment, the yoke has a through hole corresponding to the position of the boss. The boss is an insulator and has a conductive element. The fixing part has a second conductive pad. The second conductive pad is connected to the first conductive pad through the conductive line. The second conductive pad is welded to the conductive element. The bottom of the conductive element is exposed through the through hole.

[0018] In one embodiment, the centering support further includes an outlet portion and an exposed portion. The yoke has a through hole corresponding to the position of the boss. The boss has a through hole. One end of the outlet portion is connected to the fixing portion. The other end of the outlet portion passes through the through hole and the through hole, exits the receiving cavity, and is connected to the exposed portion. The exposed portion is exposed on the bottom surface of the yoke. The exposed portion has an exposed pad that is connected to the first conductive pad through the conductive line.

[0019] The beneficial effects of this utility model are as follows:

[0020] This driver unit features a novel structure, employing both a large voice coil and a large amplitude design. This allows for a larger voice coil while providing sufficient overhang length for the centering support, effectively enhancing the driver's acoustic performance. Furthermore, since the outer magnetic structure of the voice coil does not need to avoid the centering support, its overall volume can be increased, further improving the driver's acoustic performance.

[0021] The utilization rate of magnetic field lines in the central region of the central magnetic structure is relatively low. Hollowing out the central region of the central magnetic structure has little impact on the magnetic field of the sound unit itself, which helps to ensure the performance of the sound unit.

[0022] This sound-generating unit has relatively few components, making it easy to assemble and improving manufacturing efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the sound-generating unit after the diaphragm assembly is hidden in Embodiment 1 of this utility model;

[0026] Figure 3 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the sound-generating unit after the magnetic circuit assembly is hidden in Embodiment 1 of this utility model.

[0028] Explanation of icon numbers:

[0029] 1. Pot stand;

[0030] 2. Magnetic circuit assembly; 21. Yoke; 211. Boss; 212. Conductive component; 22. Side magnetic structure; 221. Side washer; 222. Side magnet; 223. Clearance space; 23. Central magnetic structure; 231. Receiving cavity; 232. Central magnet; 233. Central washer; 234. Clearance groove;

[0031] 3. Diaphragm assembly; 31. Cover plate; 32. Dome; 321. Support arm; 33. Diaphragm;

[0032] 4. Centering support; 41. Intermediate section; 42. Settlement section; 421. Elevation section; 422. Cantilever section; 423. Fixing section; 43. Connecting section;

[0033] 5. Rectangular voice coil. Detailed Implementation

[0034] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0038] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Example 1

[0041] Please refer to Figures 1 to 4Embodiment 1 of this utility model is as follows: a sound-generating unit, including a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, and a centering support 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, a side magnetic structure 22, and at least one set of central magnetic parts. Each set of central magnetic parts includes two sets of spaced-apart central magnetic structures 23, and the magnetic poles of the two sets of central magnetic structures 23 are opposite. The central magnetic structures 23 and the side magnetic structures 22 are respectively fixed to the frame 1. On the yoke 21, the side magnetic structure 22 is arranged around the central magnetic part, and the central magnetic structure 23 has a receiving cavity 231 communicating with its top surface. The yoke 21 is provided with a boss 211, which is located in the receiving cavity 231. The diaphragm assembly 3 is provided with a plurality of rectangular voice coils 5, which are arranged one-to-one with the central magnetic structure 23. Each group of central magnetic parts is respectively provided with a centering support 4, and the centering support 4 includes a middle part 41 and a settling part 4. 2. The middle part 41 is provided on the long axis side of the two rectangular voice coils 5 that are close to each other and are corresponding to the central magnetic parts of the same group. The length direction of the middle part 41 is consistent with the length direction of the long axis side of the rectangular voice coil 5. The end of the middle part 41 is located outside the voice coil. The end of the middle part 41 is provided with a first conductive pad that is connected to the voice coil. The two sides of the middle part 41 are respectively connected to the sinking part 42. The two sinking parts 42 are respectively located in the receiving cavity 231 of different central magnetic structures 23 of the same group of central magnetic parts. The sinking part 42 includes a raised part 421, a cantilever part 422 and a fixed part 423 connected in sequence. The fixed part 423 is fixed on the boss 211. The middle part 41 is fixed on the diaphragm assembly 3. Preferably, the centering support 4 is a flexible circuit board. The centering support 4 is provided with a conductive line that is connected to the first conductive pad. The external power supply is connected to the rectangular voice coil 5 through the conductive line.

[0042] To improve the structural stability of the sound-generating unit, the middle part 41 is fixedly connected to the two rectangular voice coils 5 located below it, for example, by adhesive bonding.

[0043] The length of the middle portion 41 is greater than the length of the long axis of the rectangular voice coil 5. When the sound-generating unit is viewed from above, the end of the middle portion 41 protrudes relative to the end of the voice coil. The first conductive pad is located at the end of the middle portion 41 and is soldered to the voice coil.

[0044] Specifically, the central magnetic structure 23 includes a central washer 233 and a central magnet 232 connecting the central washer 233 and the yoke 21. The receiving cavity 231 includes a first part disposed on the central washer 233 and a second part disposed on the central magnet 232, and the first part and the second part are connected. The two sides of the middle part 41 are respectively connected to the connecting parts 43, which are fixed on the diaphragm assembly 3. The middle part 41 is connected to the elevated part 421 through the connecting parts 43. The top surface of the central magnetic structure 23 is provided with a clearance groove 234 for avoiding the middle part 41. Preferably, the depth of the clearance groove 234 is less than or equal to the thickness of the central washer 233.

[0045] The edge magnet structure 22 includes an edge washer 221 and a plurality of edge magnets 222. The edge magnets 222 connect the edge washer 221 to the yoke 21. The edge washer 221 connects to the frame 1. Optionally, the edge washer 221 and the frame 1 are an integral structure formed by insert injection molding. The plurality of edge magnets 222 are arranged in a ring frame structure, and the central magnet is located inside the ring frame structure. The outer sides of the ends of the two rectangular voice coils 5 corresponding to the same group of central magnets are respectively provided with edge magnets 222. The magnetic poles of the two edge magnets 222 face opposite directions. A gap is formed between the two edge magnets 222, which corresponds to the gap between two adjacent rectangular voice coils 5. The gap constitutes a clearance space 223 for avoiding the end of the middle part 41. The two edge magnets 222 have opposite magnetic poles, which can prevent the edge magnets 222 from forming a magnetic loop through self-circulation. Self-circulation will reduce the magnetic field lines flowing to the magnetic gap. Therefore, the edge magnets 222 need to be designed with a gap to reduce the impact of self-circulation. The gap between the two edge magnets 222 just serves as the clearance space 223 at the end of the middle part 41.

[0046] The diaphragm assembly 3 includes a cover plate 31, a dome 32, and a diaphragm 33 surrounding the dome 32. The diaphragm 33 is connected to the frame 1. The dome 32 has an opening, and the edge of the opening has a downwardly extending support arm 321. The support arm 321 is located near the raised section 421 and contacts one end of the cantilever section 422 connected to the raised section 421. The cover plate 31 is located on the dome 32 and closes the opening. The support arm 321 can support the cantilever section 422, which helps to improve the working stability of the sound unit. Preferably, the support arm 321 is fixedly connected to one end of the cantilever section 422 connected to the raised section 421 and / or the raised section 421, which can further improve the structural stability of the sound unit.

[0047] The two settling portions 42 in the centering support 4 form a symmetrical structure. In this embodiment, the two settling portions 42 in the centering support 4 are centrally symmetrical; in other embodiments, the two settling portions 42 in the centering support 4 can also be planar symmetrical.

[0048] In other embodiments, the number of cantilever portions 422 in the settling portion 42 can be multiple. However, in this embodiment, the number of cantilever portions 422 in the settling portion 42 is one. Compared with a multi-cantilever architecture, the single-cantilever architecture's settling portion 42 occupies less space, thereby allowing the central magnetic structure 23 to be set larger, thus improving the performance of the sound-generating unit.

[0049] In this embodiment, the yoke 21 has a through hole corresponding to the position of the boss 211. The boss 211 is an insulator and has a conductive element 212. The fixing part 423 has a second conductive pad. The second conductive pad is connected to the first conductive pad through the conductive line. The second conductive pad is welded to the conductive element 212 and connected. The bottom of the conductive element 212 is exposed through the through hole. In other embodiments, the centering support plate 4 further includes an outlet portion and an exposed portion. The yoke 21 has a through hole corresponding to the position of the boss 211. The boss 211 has a through hole. One end of the outlet portion is connected to the fixing portion 423. The other end of the outlet portion passes through the through hole and the through hole, exits the receiving cavity 231, and is connected to the exposed portion. The exposed portion is exposed on the bottom surface of the yoke 21. The exposed portion has an exposed pad that is connected to the first conductive pad through the conductive line, thus eliminating the need for the conductive component 212.

[0050] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that: include Sink stand; A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly includes a yoke, a side magnetic structure, and at least one set of central magnetic parts. Each set of central magnetic parts includes two sets of spaced-apart central magnetic structures. The central magnetic structures and the side magnetic structures are respectively fixed on the yoke. The central magnetic structure has a receiving cavity communicating with its top surface. The yoke is provided with a boss located in the receiving cavity. A diaphragm assembly is connected to the frame, and the diaphragm assembly is provided with a plurality of rectangular voice coils, each of which is arranged in a one-to-one correspondence with the central magnetic structure; A centering support is provided for each group of central magnetic parts. Each centering support includes a middle part and a settling part. The middle part is positioned on the long axis of two rectangular voice coils that are close to each other and are associated with the central magnetic parts of the same group. The length direction of the middle part is consistent with the length direction of the long axis of the rectangular voice coil. The end of the middle part is located outside the voice coil. The end of the middle part is provided with a first conductive pad that is connected to the voice coil. The two sides of the middle part are respectively connected to the settling part. The two settling parts are located in the receiving cavities of different central magnetic structures of the same group of central magnetic parts. The settling part includes a raised part, a cantilever part and a fixed part connected in sequence. The fixed part is fixed to the boss. The middle part is fixed to the diaphragm assembly. The centering support is provided with a conductive line that is connected to the first conductive pad. An external power supply is connected to the rectangular voice coil through the conductive line.

2. The sound-generating unit according to claim 1, characterized in that: The middle part is fixedly connected to the two rectangular voice coils located below it.

3. The sound-generating unit according to claim 1, characterized in that: The length of the middle portion is greater than the length of the major axis of the rectangular voice coil, and the end of the middle portion protrudes relative to the end of the voice coil.

4. The sound-generating unit according to claim 3, characterized in that: The side magnet structure includes a side washer and multiple side magnets. The side magnets connect the side washer to the yoke. The side washer is connected to the frame. The multiple side magnets are arranged in a ring structure. The central magnet is located inside the ring structure. The side magnets are respectively provided on the outer side of the ends of the two rectangular voice coils corresponding to the same group of central magnets. The magnetic poles of the two side magnets face opposite directions. A gap is formed between the two side magnets, corresponding to the gap between two adjacent rectangular voice coils. The gap constitutes a clearance space to avoid the end of the middle part.

5. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a cover plate, a dome, and a diaphragm surrounding the dome. The diaphragm is connected to the frame. The dome has an opening with a downwardly extending support arm along its edge. The support arm is located near the frame and contacts one end of the cantilever that connects to the frame. The cover plate is located on the dome and closes the opening.

6. The sound-generating unit according to claim 1, characterized in that: The two settling portions in the centering support form a symmetrical structure.

7. The sound-generating unit according to claim 1, characterized in that: The number of cantilever sections in the settlement section is one or more.

8. The sound-generating unit according to claim 1, characterized in that: The middle part is connected to the two sides of the middle part, and the middle part is connected to the elevated part through the connecting parts. The top surface of the central magnetic structure is provided with a clearance groove for avoiding the middle part.

9. The sound-generating unit according to claim 1, characterized in that: The yoke has a through hole corresponding to the position of the boss. The boss is an insulator and has a conductive element. The fixing part has a second conductive pad. The second conductive pad is connected to the first conductive pad through the conductive line. The second conductive pad is welded to the conductive element. The bottom of the conductive element is exposed through the through hole.

10. The sound-generating unit according to claim 1, characterized in that: The centering support also includes an outlet portion and an exposed portion. The yoke has a through hole corresponding to the position of the boss. The boss has a through hole. One end of the outlet portion is connected to the fixing portion. The other end of the outlet portion passes through the through hole and the through hole, exits the receiving cavity, and is connected to the exposed portion. The exposed portion is exposed on the bottom surface of the yoke. The exposed portion has an exposed pad that is connected to the first conductive pad through the conductive line.

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