Sound production unit

Abstract

The utility model discloses a sounding unit, including basin stand, magnetic circuit subassembly, diaphragm subassembly, centering disk and bridge circuit board, magnetic circuit subassembly is connected basin stand, magnetic circuit subassembly includes yoke, side magnetic structure and multi-group central magnetic structure, central magnetic structure and side magnetic structure are fixed on yoke respectively, central magnetic structure has the accommodation cavity that communicates its top surface, and the bridge circuit board is connected with the yoke. A boss is arranged on the yoke and located in the containing cavity. The vibrating diaphragm assembly is connected with the basin frame, and a plurality of rectangular voice coils are arranged on the vibrating diaphragm assembly; the centering disk comprises a first fixing part, an elevated part, a cantilever part and a second fixing part which are connected in sequence, and the first fixing part is provided with a first conduction bonding pad which is conducted with a lead of the rectangular voice coil; the bridging circuit boards are arranged on the vibrating diaphragm assembly, the bridging circuit boards are correspondingly arranged at the positions, close to each other, of every two adjacent rectangular voice coils, and the bridging circuit boards are provided with bridging bonding pads conducted with the other leads of the rectangular voice coils. The sounding unit is novel in structure and excellent in performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electroacoustic transducer, especially relates to sound unit. BACKGROUND

[0002] In order to further improve the utilization of magnetic steel, provide stronger driving force, improve the sensitivity of sound unit, increase loudness, the current market appears the sound unit of multi voice coil architecture.

[0003] However, in order to improve the performance of sound unit, the existing sound unit adopts the design of large voice coil and large amplitude architecture, and a through centering piece is arranged in part of the sound unit, the through centering piece has the function of connecting the voice coil with external power supply and correcting the voice coil to improve the roll vibration of the voice coil, in the prior art, the through centering piece is generally located on the outer side of the voice coil, when the sound unit adopts the design of large amplitude, the through centering piece needs to have sufficient overhanging length to avoid stress concentration and breakage, but in the sound unit of large voice coil architecture, the space on the outer side of the voice coil is insufficient, and thus the side magnetic steel or the through centering piece cannot be placed, leading to that the performance cannot be further improved. SUMMARY

[0004] The utility model solves the technical problem to provide a kind of high-performance sound unit of multi voice coil architecture.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme that: sound unit, comprising:

[0006] The utility model relates to the technical field of electroacoustic transducer, especially relates to sound unit.

[0007] Magnetic circuit assembly, the magnetic circuit assembly is connected the basin frame, the magnetic circuit assembly includes yoke, side magnetic structure and multiple center magnetic structures, the center magnetic structure and side magnetic structure are respectively fixed on the yoke, the center magnetic structure has the accommodating cavity that communicates with its top surface, the yoke is equipped with boss, and the boss is located in the accommodating cavity;

[0008] Vibrating diaphragm assembly, the vibrating diaphragm assembly is connected the basin frame, and a plurality of rectangular voice coils are equipped on the vibrating diaphragm assembly, and the rectangular voice coil is set up one by one with the center magnetic structure;

[0009] Centering piece, the centering piece includes first fixed part, heightening part, cantilever part and second fixed part that are sequentially connected, the second fixed part is fixed on the boss, the cantilever part is located in the accommodating cavity, the first fixed part is fixed on the vibrating diaphragm assembly, and the first fixed part is equipped with the first through pad that is connected with the lead of the rectangular voice coil;

[0010] A bridge circuit board is arranged on the diaphragm assembly, the length direction of the bridge circuit board is consistent with the long axis direction of the rectangular voice coil, the bridge circuit board is arranged at the position where the two adjacent rectangular voice coils are close to each other, the bridge circuit board is provided with a bridge pad in electrical connection with the other lead wire of the rectangular voice coil, and the two bridge pads on the bridge circuit board are in electrical connection with each other.

[0011] In an embodiment, the bridge circuit board is fixedly connected with the two rectangular voice coils located below the bridge circuit board.

[0012] In an embodiment, the length of the bridge circuit board is greater than the length of the long side of the rectangular voice coil, and the two bridge pads on the bridge circuit board are respectively located at the two ends of the bridge circuit board.

[0013] In an embodiment, the side magnetic structure includes a side H-shaped magnet and a plurality of side magnetic steel, the side magnetic steel connects the side H-shaped magnet and the yoke, the side H-shaped magnet is connected with the yoke, the plurality of side magnetic steel are arranged in a ring frame structure, and the center magnetic structure is located in the ring frame structure; the outer side of the end portion of the two adjacent rectangular voice coils is respectively provided with the side magnetic steel, the magnetic poles of the two side magnetic steels face opposite directions, and the gap between the two side magnetic steels forms a clearance corresponding to the gap between the two adjacent rectangular voice coils, and the clearance constitutes a clearance space for avoiding the end portion of the bridge circuit board.

[0014] In an embodiment, the center magnetic structure includes a center H-shaped magnet and a center magnetic steel connecting the center H-shaped magnet and the yoke, and the accommodating cavity includes a first part arranged on the center H-shaped magnet and a second part arranged on the center magnetic steel.

[0015] In an embodiment, the diaphragm assembly includes a cover plate, a ball top and a sound film arranged around the ball top, the sound film is connected with the yoke, the ball top is provided with a window, the edge of the window has a support arm extending downward, the support arm is arranged close to the raised portion, the support arm contacts one end of the cantilever portion connected with the raised portion, and the cover plate is arranged on the ball top and closes the window.

[0016] In an embodiment, the two adjacent centering support plates form a symmetrical structure.

[0017] In an embodiment, the number of the cantilever portion in the centering support plate is one or more.

[0018] In an embodiment, the yoke is provided with a through hole corresponding to the position of the boss, the boss is an insulator, the boss is provided with a conductive part, the second fixed part is provided with a second conductive pad, the second conductive pad is in conduction with the conductive part and the first conductive pad respectively, and the bottom of the conductive part is exposed through the through hole.

[0019] In an embodiment, the centering sheet further comprises a leading part and an exposed part, the yoke is provided with a through hole corresponding to the position of the boss, the boss is provided with a via hole, one end of the leading part is connected to the second fixed part, the other end of the leading part is connected to the exposed part through the via hole and the through hole, the exposed part is exposed on the bottom surface of the yoke, and the exposed part is provided with an exposed pad in conduction with the first conductive pad.

[0020] The sound production unit has the advantages that:

[0021] The sound production unit has novel structure, and can simultaneously adopt a large voice coil and a large amplitude design architecture. The rectangular voice coil can be made larger, and the centering sheet can also have sufficient overhanging length, so that the acoustic performance of the sound production unit is effectively improved. Meanwhile, the side magnet structure on the outer side of the rectangular voice coil does not need to avoid the centering sheet, so that the overall volume of the side magnet structure can be made larger, thereby further improving the acoustic performance of the sound production unit.

[0022] The magnetic induction line utilization rate of the central region of the center magnetic structure is relatively low, and the hollowing of the central region of the center magnetic structure has little influence on the magnetic field of the sound production unit, thereby facilitating the performance of the sound production unit. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0024] Fig. 1 It is an exploded view of the sound production unit of the first embodiment of the present application.

[0025] Fig. 2 It is a structural schematic view of the sound production unit of the first embodiment of the present application after hiding the diaphragm assembly.

[0026] Fig. 3 It is a sectional view of the sound production unit of the first embodiment of the present application.

[0027] EXPLANATION OF DRAWINGS:

[0028] 1. A stand;

[0029] 2. A magnetic circuit assembly; 21. A yoke; 211. A boss; 212. An electrically conductive member; 22. An edge magnetic structure; 221. An edge amorphous metal; 222. An edge magnetic steel; 223. A gap; 23. A center magnetic structure; 231. A receiving cavity; 232. A center amorphous metal; 233. A center magnetic steel;

[0030] 3. A diaphragm assembly; 31. A cover plate; 32. A dome; 321. A window; 322. A support arm; 33. A sound film;

[0031] 4. A centering support; 41. A first fixed portion; 42. A heightening portion; 43. A cantilever portion; 44. A second fixed portion;

[0032] 5. A bridge circuit board;

[0033] 6. A rectangular voice coil. DETAILED DESCRIPTION

[0034] The utility model discloses purposes, function features and advantages will be combined with the embodiment, reference drawing further explanation.

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] It should be noted that if the embodiments of the utility model involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings. If the specific posture changes, the directional indications also change accordingly.

[0037] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features.

[0038] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions, for example, "and / or" includes the solution, or the solution, or the solution that satisfies both. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the utility model.

[0039] In this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in this application can be understood according to the specific circumstances.

[0040] Embodiment one

[0041] Please refer to Figs. 1 to 3 The embodiment one of the utility model discloses: sound unit, including the frame 1, magnetic circuit assembly 2, diaphragm assembly 3, centering support sheet 4 and bridging circuit board 5, magnetic circuit assembly 2 is connected frame 1, magnetic circuit assembly 2 includes yoke 21, side magnetic structure 22 and multiple center magnetic structure 23, preferably the number of multiple center magnetic structure 23 is arranged side by side, the magnetic pole polarity of adjacent two center magnetic structure 23 is opposite, center magnetic structure 23 and side magnetic structure 22 are fixed on yoke 21 respectively, center magnetic structure 23 has the accommodating cavity 231 that communicates its top surface, yoke 21 is equipped with boss 211, boss 211 is located in accommodating cavity 231;Diaphragm assembly 3 is connected frame 1, diaphragm assembly 3 is equipped with multiple rectangular voice coil 6, rectangular voice coil 6 is set up one by one with center magnetic structure 23;Centering support sheet 4 includes sequentially connected first fixed part 41, heightening part 42, cantilever part 43 and second fixed part 44, second fixed part 44 is fixed on boss 211, cantilever part 43 is located in accommodating cavity 231, first fixed part 41 is fixed on diaphragm assembly 3, first fixed part 41 is equipped with the first conduction pad that is led through with the lead of rectangular voice coil 6;Bridging circuit board 5 is located on diaphragm assembly 3, the length direction of bridging circuit board 5 is consistent with the long axis direction of rectangular voice coil 6, two rectangular voice coil 6 is correspondingly equipped with bridging circuit board 5 at the position of being close to each other, bridging circuit board 5 is equipped with the bridging pad that is led through with the other lead of rectangular voice coil 6, two bridging pads on bridging circuit board 5 are mutually conducted.

[0042] In order to improve the structural stability of the sound generating unit, the bridge circuit board 5 is fixedly connected with the two rectangular voice coils 6 below it, for example, by adhesive connection or the like; the bridge circuit board 5 can be a hard circuit board or a flexible circuit board, but preferably a flexible circuit board.

[0043] The two bridge pads on the bridge circuit board 5 are respectively located at the two ends of the bridge circuit board 5, and the length of the bridge circuit board 5 is greater than the length of the long side of the rectangular voice coil 6, so that the end of the bridge circuit board 5 can protrude relative to the end of the rectangular voice coil 6, thereby providing sufficient space for the bridge pads at the end of the bridge circuit board 5.

[0044] Specifically, the center magnetic structure 23 includes a center Hua Si 232 and a center magnetic steel 233 connecting the center Hua Si 232 and the yoke 21, the accommodating cavity 231 includes a first part provided on the center Hua Si 232 and a second part provided on the center magnetic steel 233, and the first part and the second part are in communication; the edge magnetic structure 22 includes an edge Hua Si 221 and a plurality of edge magnetic steels 222, the edge magnetic steels 222 connecting the edge Hua Si 221 and the yoke 21, and the edge Hua Si 221 connecting the yoke 1, and optionally, the edge Hua Si 221 and the yoke 1 are an integral structure formed by insert injection molding; the plurality of edge magnetic steels 222 are arranged in a ring frame structure, the center magnetic structure 23 is located in the ring frame structure, and the outer sides of the ends of the two adjacent rectangular voice coils 6 correspond to the edge magnetic steels 222, respectively, the magnetic poles of the two edge magnetic steels 222 facing opposite directions, and the gap 223 corresponding to the gap between the two adjacent rectangular voice coils 6 is formed between the two edge magnetic steels 222, the gap 223 constituting an avoidance space for avoiding the ends of the bridge circuit board 5. The magnetic poles of the two edge magnetic steels 222 are opposite in polarity, which can prevent the edge magnetic steels 222 from forming a magnetic loop by self-circulation, and self-circulation can reduce the magnetic flux flowing into the magnetic gap, so the edge magnetic steels 222 need to be designed with a gap to reduce the influence of self-circulation, and the gap 223 between the two edge magnetic steels 222 serves as an avoidance space for the end of the bridge circuit board 5.

[0045] The diaphragm assembly 3 comprises a cover plate 31, a dome 32, and a sound film 33 arranged around the dome 32, the sound film 33 being connected to the yoke 1, the dome 32 being provided with an opening window 321, the edge of the opening window 321 being provided with a support arm 322 extending downward, the support arm 322 being arranged close to the elevated portion 42, the support arm 322 being connected to one end of the elevated portion 42 of the cantilever portion 43, and the cover plate 31 being arranged on the dome 32 and covering the opening window 321. The support arm 322 can support the cantilever portion 43, which is conducive to improving the working stability of the sound unit. Preferably, the support arm 322 is fixedly connected to one end of the elevated portion 42 of the cantilever portion 43 and / or the elevated portion 42, which can further improve the structural stability of the sound unit.

[0046] The two adjacent centering fins 4 form a symmetrical structure. In this embodiment, the two adjacent centering fins 4 are centrally symmetrical. In other embodiments, the two adjacent centering fins 4 can also be plane symmetrical.

[0047] In other embodiments, the number of cantilever portions 43 in the centering fin 4 can be multiple. In this embodiment, the number of cantilever portions 43 is one. Compared with the multi-cantilever structure, the single-cantilever structure of the centering fin 4 occupies less space, so that the volume of the center magnetic structure 23 can be larger, thereby improving the performance of the sound unit.

[0048] In one or more embodiments, the yoke 21 is provided with a through hole corresponding to the position of the boss 211, the boss 211 is an insulator, the boss 211 is provided with a conductive part 212, the second fixed portion 44 is provided with a second conductive pad, the second conductive pad is in conductive connection with the conductive part 212 and the first conductive pad respectively, and the bottom of the conductive part 212 is exposed through the through hole to be electrically connected with an external power supply. The conductive part 212 can be a metal structural part.

[0049] In one or more embodiments, the centering fin 4 further comprises a lead-out portion and an exposed portion, the yoke 21 is provided with a through hole corresponding to the position of the boss 211, the boss 211 is provided with a via hole, one end of the lead-out portion is connected to the second fixed portion 44, the other end of the lead-out portion is connected to the exposed portion through the via hole and the through hole, and the exposed portion is exposed on the bottom surface of the yoke 21, the exposed portion is provided with an exposed pad in conductive connection with the first conductive pad, and the exposed pad is used to connect an external power supply.

[0050] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A sound emitting unit, characterized by: The application relates to a loudspeaker, which comprises a yoke, a magnetic circuit assembly connected to the yoke, a diaphragm assembly connected to the yoke, a centering support sheet, and a bridging circuit board. The magnetic circuit assembly comprises a yoke, a plurality of sets of center magnetic structures, and a side magnetic structure, the center magnetic structures and the side magnetic structure being fixed to the yoke respectively, the center magnetic structure having a receiving cavity communicating with a top surface thereof, the yoke being provided with a boss, and the boss being located in the receiving cavity. The diaphragm assembly is provided with a plurality of rectangular voice coils, and the rectangular voice coils are arranged one by one in correspondence with the center magnetic structures. The centering support sheet comprises a first fixing part, a height-raising part, a cantilever part, and a second fixing part connected in sequence, the second fixing part being fixed to the boss, the cantilever part being located in the receiving cavity, the first fixing part being fixed to the diaphragm assembly, and the first fixing part being provided with a first conductive pad in conductive communication with a lead wire of the rectangular voice coil. The bridging circuit board is arranged on the diaphragm assembly, the length direction of the bridging circuit board is consistent with the long axis direction of the rectangular voice coil, the bridging circuit board is arranged at a position where two adjacent rectangular voice coils are close to each other, the bridging circuit board is provided with a bridging pad in conductive communication with another lead wire of the rectangular voice coil, and two bridging pads on the bridging circuit board are in conductive communication with each other. The bridging circuit board is fixedly connected to two rectangular voice coils located below the bridging circuit board.

2. The sound producing unit of claim 1, wherein: The length of the bridging circuit board is greater than the length of the long side of the rectangular voice coil, and two bridging pads on the bridging circuit board are located at two ends of the bridging circuit board respectively.

3. The sound producing unit of claim 1, wherein: The side magnetic structure comprises a side armature and a plurality of side magnetic steels, the side magnetic steels connecting the side armature and the yoke, the side armature connecting the yoke, the plurality of side magnetic steels being arranged in a ring frame structure, and the center magnetic structure being located in the ring frame structure; the outer sides of the end portions of two adjacent rectangular voice coils are respectively provided with the side magnetic steels, the magnetic poles of the two side magnetic steels face opposite directions, and the two side magnetic steels form a gap corresponding to a gap between the two adjacent rectangular voice coils, and the gap constitutes an avoiding space for avoiding the end portions of the bridging circuit board.

4. The sound producing unit of claim 3, wherein: The center magnetic structure comprises a center armature and a center magnetic steel connecting the center armature and the yoke, and the receiving cavity comprises a first part arranged on the center armature and a second part arranged on the center magnetic steel.

5. The sound producing unit of claim 1, wherein: The diaphragm assembly comprises a cover plate, a ball top, and a sound membrane arranged around the ball top, the sound membrane connecting the yoke, the ball top being provided with a window, the edge of the window being provided with a support arm extending downward, the support arm being arranged close to the height-raising part, the support arm contacting one end of the height-raising part connected to the cantilever part, and the cover plate being arranged on the ball top and closing the window.

6. The sound producing unit of claim 1, wherein: Two adjacent centering support sheets form a symmetrical structure.

7. The sound producing unit of claim 1, wherein: The number of the cantilever parts in the centering support sheet is one or more.

8. The sound producing unit of claim 1, wherein: ​ 9. The sound producing unit of claim 1, wherein: The yoke is provided with a through hole corresponding to the position of the boss, the boss is an insulator, the boss is provided with a conductive part, the second fixed part is provided with a second conductive pad, the second conductive pad is in conduction with the conductive part and the first conductive pad respectively, and the bottom of the conductive part is exposed through the through hole.

10. The sound producing unit of claim 1, wherein: The centering piece further comprises a leading-out part and an exposed part, the yoke is provided with a through hole corresponding to the position of the boss, the boss is provided with a via hole, one end of the leading-out part is connected to the second fixed part, the other end of the leading-out part is connected to the exposed part through the via hole and the through hole, the exposed part is exposed to the bottom surface of the yoke, and the exposed part is provided with an exposed pad in conduction with the first conductive pad.

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