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 includes yoke, side magnetic structure and at least one set of central magnetic part, each set of central magnetic part includes two sets of central magnetic structure that are arranged at interval, central magnetic structure has the accommodation cavity that is communicated with its top surface, the yoke is equipped with boss, the side magnetic structure is equipped with the side magnetic structure, and the side magnetic structure is equipped with the side magnetic structure. The boss is located in the containing cavity. A plurality of voice coils are arranged on the vibrating diaphragm assembly; each group of central magnetic parts respectively correspond to a centering support chip, each centering support chip comprises a middle part and a sedimentation part, the two ends of the middle part are respectively connected with the sedimentation parts, the two sedimentation parts are respectively positioned in different accommodating cavities, each sedimentation part comprises an elevated part, a cantilever part and a fixed part which are connected in sequence, the fixed part is fixed on the boss, the middle part is fixed on the vibrating diaphragm assembly, and the cantilever part is fixed on the vibrating diaphragm assembly. The centering disk is provided with a conduction line which is conducted with the voice coil, and an external power supply conducts the voice coil through the conduction line. 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 multiple voice coils, each voice coil corresponding to a central magnetic structure.

[0009] The centering piece corresponds to the center magnetic part, and the centering piece includes an intermediate part and a sinking part. The two ends of the intermediate part are connected with the sinking part respectively. The two sinking parts are located in the accommodating cavities of different center magnetic structures of the same center magnetic part respectively. The sinking part includes a raised part, a cantilever part and a fixed part connected in sequence. The fixed part is fixed on the boss. The intermediate part is fixed on the diaphragm assembly. A conduction circuit is arranged on the centering piece and connected with the voice coil. An external power supply is connected with the voice coil through the conduction circuit.

[0010] In an embodiment, when the sound production unit is viewed from a top perspective, the two ends of the intermediate part are located in the hollow regions of different voice coils respectively. The conduction circuit includes a first conduction pad arranged on the intermediate part. The first conduction pad is located at the end of the intermediate part. The first conduction pad is welded with the voice coil.

[0011] In an embodiment, the yoke is provided with a through hole corresponding to the position of the boss. The boss is an insulator. An electrically conductive part is arranged on the boss. The conduction circuit further includes a second conduction pad arranged on the fixed part. The second conduction pad is connected with the electrically conductive part and the first conduction pad respectively. The bottom of the electrically conductive part is exposed through the through hole.

[0012] In an embodiment, the centering piece further includes a leading part and an exposed part. The yoke is provided with a through hole corresponding to the position of the boss. A via hole is arranged on the boss. One end of the leading part is connected with the fixed part. The other end of the leading part is connected with the exposed part through the via hole and the through hole. The exposed part is exposed on the bottom surface of the yoke. The conduction circuit further includes an exposed pad arranged on the exposed part. The exposed pad is connected with the first conduction pad.

[0013] In an embodiment, the intermediate part is fixedly connected with the voice coil located below the intermediate part.

[0014] In an embodiment, the edge magnetic structure includes an edge H-shaped magnet and a plurality of edge magnetic steels. The edge magnetic steels connect the edge H-shaped magnet and the yoke. The edge H-shaped magnet is connected with the spider. The plurality of edge magnetic steels are arranged in a ring frame structure. The center magnetic part is located in the ring frame structure. The edge magnetic steels are arranged corresponding to the outer sides of the ends of the two voice coils of the same center magnetic structure. The magnetic poles of the two edge magnetic steels face opposite directions. The gap between the two edge magnetic steels corresponds to the gap between the two adjacent voice coils.

[0015] In an embodiment, the diaphragm assembly comprises a cover plate, a dome, and a sound membrane disposed around the dome, the sound membrane connecting the yoke, the dome being provided with an opening window, the edge of the opening window having a support arm extending downward, the support arm being disposed close to the elevated portion, the support arm contacting one end of the cantilever portion connecting the elevated portion, and the cover plate being disposed on the dome and closing the opening window.

[0016] In an embodiment, the two sink portions in the centering spider form a symmetrical structure.

[0017] In an embodiment, the number of cantilever portions in the sink portion is one or more.

[0018] In an embodiment, the number of central magnetic portions is two groups.

[0019] The beneficial effects of the utility model lie in:

[0020] The sound unit structure is novel, the sound unit can simultaneously adopt a large voice coil and a large amplitude design framework, the voice coil can be larger, and the centering spider can also have sufficient overhanging length, so that the acoustic performance of the sound unit is effectively improved. At the same time, since the side magnetic structure outside the voice coil does not need to avoid the centering spider, the overall volume of the side magnetic structure can be set larger, so that the acoustic performance of the sound unit is further improved.

[0021] The magnetic induction line utilization rate of the central region of the center magnetic structure is relatively low, hollowing out the central region of the center magnetic structure has little effect on the magnetic field of the sound unit itself, and is beneficial to guarantee the performance of the sound unit.

[0022] The sound unit has fewer parts, is convenient to assemble, and is beneficial to improve manufacturing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the structure shown in the drawings without creative labor.

[0024] Figure 1 It is an exploded view of the sound unit of the utility model embodiment one.

[0025] Figure 2 It is a sectional view of the sound unit of the utility model embodiment one.

[0026] Figure 3 It is a structure schematic view of the sound unit of the utility model embodiment one hidden diaphragm assembly.

[0027] Figure 4 Structure schematic view of the sound unit hidden magnetic circuit component according to the first embodiment of the present application;

[0028] Figure 5 Sectional view of the sound unit according to the second embodiment of the present application.

[0029] Explanation of reference numerals:

[0030] 1. A stand;

[0031] 2. A magnetic circuit component; 21. A yoke; 211. A boss; 212. A conductive piece; 22. An edge magnetic structure; 221. An edge dust shield; 222. An edge magnetic steel; 23. A center magnetic structure; 231. A receiving cavity; 232. A center magnetic steel; 233. A center dust shield; 234. An empty slot;

[0032] 3. A diaphragm assembly; 31. A cover plate; 32. A ball top; 321. A support arm; 33. A sound film;

[0033] 4. A centering support sheet; 41. An intermediate portion; 42. A sunken portion; 421. A heightening portion; 422. A cantilever portion; 423. A fixed portion;

[0034] 5. A voice coil. DETAILED DESCRIPTION

[0035] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that if the embodiments of the present application involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional 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.

[0038] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, 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 limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0039] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. Taking "and / or" as an example, it includes scheme, or scheme, or and simultaneously satisfied scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the 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 present application.

[0040] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Embodiment one

[0042] Please refer to Figures 1 to 4The utility model discloses an embodiment one for: sounding unit, including basin frame 1, magnetic circuit component 2, diaphragm component 3 and centering support piece 4, magnetic circuit component 2 and diaphragm component 3 are connected respectively basin frame 1, magnetic circuit component 2 includes yoke iron 21, side magnetic structure 22 and at least one group center magnetic part, and each group center magnetic part includes two groups interval arrangement center magnetic structure 23, and two groups center magnetic structure 23's magnetic pole polarity is opposite, center magnetic structure 23 and side magnetic structure 22 are fixed respectively on yoke iron 21, side magnetic structure 22 surrounds and is arranged center magnetic part, center magnetic structure 23 has the accommodating cavity 231 that communicates its top surface, yoke iron 21 is equipped with boss 211, boss 211 is located in accommodating cavity 231, diaphragm component 3 is equipped with a plurality of voice coil 5, voice coil 5 and center magnetic structure 23 are set up one to one correspondence, and each group center magnetic part corresponds respectively centering support piece 4, centering support piece 4 includes intermediate part 41 and subsidence part 42, two ends of intermediate part 41 are connected with subsidence part 42 respectively, two subsidence parts 42 are located in the accommodating cavity 231 of different center magnetic structure 23 of same group center magnetic part respectively, subsidence part 42 includes in proper order link's high part 421, cantilever part 422 and fixed part 423, fixed part 423 is fixed on boss 211, intermediate part 41 is fixed on diaphragm component 3, preferably centering support piece 4 is flexible circuit board, and centering support piece 4 is equipped with the conduction circuit with voice coil 5 conduction, and external power supply passes through conduction circuit and conduction voice coil 5.

[0043] When sounding unit is looked from the perspective of top view, two ends of intermediate part 41 are located in the hollow region of different voice coil 5 respectively, and the conduction circuit includes first conduction pad arranged on intermediate part 41, the first conduction pad is located at the end of intermediate part 41, and the first conduction pad is welded with voice coil 5.

[0044] In this embodiment, 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 conductive part 212 is exposed through the through hole, and the conductive part 212 is in conductive connection with the first conductive pad and the second conductive pad. In other embodiments, the centering sheet 4 further comprises a lead-out part and an exposed part, 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 part is connected to the fixed part 423, the other end of the lead-out part is connected to the exposed part through the via hole and the through hole, and the exposed part is exposed on the bottom surface of the yoke 21. The exposed pad on the exposed part is in conductive connection with the first conductive pad, so that the conductive part 212 is not needed.

[0045] To improve the structural stability of the sound generating unit, the intermediate part 41 is fixedly connected to the voice coil 5 below, for example, by adhesive connection.

[0046] The side magnetic structure 22 comprises a side Halsal 221 and a plurality of side magnetic steel 222, the side magnetic steel 222 connects the side Halsal 221 and the yoke 21, the side Halsal 221 connects the yoke 1, a plurality of the side magnetic steel 222 are arranged in a ring frame structure, and the center magnetic part is located in the ring frame structure; the outer side of the end part of the two voice coils 5 corresponding to the same group of two center magnetic structures 23 is provided with the side magnetic steel 222, the magnetic poles of the two side magnetic steels 222 are opposite, and the gap between the two side magnetic steels 222 corresponds to the gap between the two adjacent voice coils 5. The magnetic poles of the two side magnetic steels 222 are opposite in polarity, which can prevent the side magnetic steel 222 from forming a magnetic loop by itself, and the self-circulation will reduce the magnetic induction lines flowing to the magnetic gap, so the side magnetic steel 222 needs a gap design to reduce the influence of self-circulation.

[0047] 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 is connected to the yoke 1, the dome 32 is provided with an opening window, the edge of the opening window has a support arm 321 extending downward, the support arm 321 is arranged close to the elevated portion 421, the support arm 321 contacts one end of the elevated portion 421 connected to the cantilever portion 422, and the cover plate 31 is arranged on the dome 32 and closes the opening window. The support arm 321 can support the cantilever portion 422, which is conducive to improving the working stability of the sound generating unit. Preferably, the support arm 321 is fixedly connected to one end of the elevated portion 421 connected to the cantilever portion 422 and / or the elevated portion 421, which can further improve the structural stability of the sound generating unit.

[0048] The two settlement portions 42 in the centering support sheet 4 form a symmetrical structure. In the embodiment, the two settlement portions 42 in the centering support sheet 4 are centrally symmetrical. In other embodiments, the two settlement portions 42 in the centering support sheet 4 can also be plane symmetrical.

[0049] In other embodiments, the number of cantilever portions 422 in the settlement portion 42 can be multiple. In the embodiment, the number of cantilever portions 422 in the settlement portion 42 is one. Compared with the multi-cantilever structure, the single-cantilever structure of the settlement portion 42 occupies less space, so that the volume of the center magnetic structure 23 can be larger, thereby improving the performance of the sound generating unit.

[0050] Specifically, the center magnetic structure 23 comprises a center dust core 233 and a center magnetic steel 232 connecting the center dust core 233 and the yoke 21, the accommodating cavity 231 comprises a first part arranged on the center dust core 233 and a second part arranged on the center magnetic steel 232, and the first part and the second part are in communication. To avoid collision between the diaphragm assembly 3, the intermediate portion 41 and / or the first conductive pad and the connection between the lead of the voice coil 5 and the center magnetic structure 23 during vibration, the top surface of the center magnetic structure 23 is provided with an avoidance slot 234, which is located on one side of the accommodating cavity 231 and in communication with the accommodating cavity 231. It is easy to understand that the depth of the avoidance slot 234 can be less than, equal to, or greater than the thickness of the center dust core 233.

[0051] Embodiment two

[0052] Please refer to Figure 5The embodiment two of the utility model is parallel technical scheme of the embodiment one, and the difference with the embodiment one is that: in this embodiment, the number of central magnetic parts is two groups, that is to say, in the sound unit of this embodiment, the number of central magnetic structures 23 is four groups.

[0053] The above is only optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made under the inventive concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A sound emitting unit, characterized by: The voice coil motor comprises a yoke, a magnetic circuit assembly connected to the yoke, a diaphragm assembly connected to the yoke, and a centering sheet corresponding to each of the center magnetic structures. The magnetic circuit assembly comprises a yoke, a magnetic structure, and at least one set of center magnetic structures. The diaphragm assembly is connected to the yoke and is provided with a plurality of voice coils corresponding to the center magnetic structures. The centering sheet comprises an intermediate portion and a sinking portion. The sinking portion comprises a height-raising portion, a cantilever portion, and a fixing portion.

2. The sound producing unit of claim 1, wherein: The fixing portion is fixed on the boss.

3. The sound producing unit of claim 2, wherein: The intermediate portion is fixed on the diaphragm assembly.

4. The sound producing unit of claim 2, wherein: The centering sheet is provided with a conduction circuit in conduction with the voice coils.

5. The sound producing unit of claim 1, wherein: The conduction circuit comprises a first conduction pad on the intermediate portion.

6. The sound producing unit of claim 1, wherein: The first conduction pad is located at the end of the intermediate portion and is welded in conduction with the voice coil. The yoke is provided with a through hole corresponding to the position of the boss. The boss is an insulator and is provided with a conductive part. The conduction circuit further comprises a second conduction pad on the fixing portion. The second conduction pad is in conduction with the conductive part and the first conduction pad. The bottom of the conductive part is exposed through the through hole. The centering sheet further comprises a leading portion and an exposed portion. 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 portion is connected to the fixing portion. The other end of the leading portion is connected to the exposed portion through the via hole and the through hole. The exposed portion is exposed on the bottom surface of the yoke. The conduction circuit further comprises an exposed pad on the exposed portion. The exposed pad is in conduction with the first conduction pad. The intermediate portion is fixedly connected to the voice coil located below. The magnetic structure comprises a side field system and a plurality of side magnetic steels. The side magnetic steels connect the side field system and the yoke. The side field system is connected to the yoke. The plurality of side magnetic steels are arranged in a ring frame structure. The center magnetic structures are located in the ring frame structure. The side magnetic steels are provided corresponding to the outer sides of the ends of the two voice coils corresponding to the same set of center magnetic structures. The magnetic poles of the two side magnetic steels face opposite directions. The gap between the two side magnetic steels corresponds to the gap between the two adjacent voice coils.

7. The sound producing unit of claim 1, wherein: The diaphragm assembly comprises a cover plate, a dome, and a sound membrane arranged around the dome, the sound membrane is connected to the frame, the dome is provided with an opening window, the edge of the opening window has a support arm extending downward, the support arm is arranged close to the frame height part, the support arm contacts one end of the cantilever part connecting the frame height part, and the cover plate is arranged on the dome and closes the opening window.

8. The sound producing unit of claim 1, wherein: The two sink parts in the centering piece form a symmetrical structure.

9. The sound producing unit of claim 1, wherein: The number of the cantilever parts in the sink part is one or more.

10. The sound producing unit of claim 1, wherein: The number of the center magnetic parts is two groups.

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