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 is connected basin stand, magnetic circuit subassembly includes yoke, side magnetic structure and at least one group of central magnetic part, each group of central magnetic part includes two groups of central magnetic structure that are arranged at interval, central magnetic structure and side magnetic structure are respectively fixed on yoke, and the yoke is fixed on the side magnetic structure. The central magnetic structure is provided with an accommodating cavity communicated with the top surface of the central magnetic structure, the accommodating cavity is communicated with one side, close to the other group of central magnetic structure, of the central magnetic structure, and a boss is arranged on the yoke and located in the accommodating cavity; the vibrating diaphragm assembly is connected with the basin frame, a plurality of rectangular voice coils are arranged on the vibrating diaphragm assembly, 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 sheet, each centering support sheet comprises a middle part, two sides of each middle part are respectively connected with a cantilever part, each cantilever part is connected with a fixed part, and the cantilever parts and the fixed parts are respectively positioned in the accommodating cavity. 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 mostly adopts big voice coil and big amplitude architecture design, part of sound unit will be set up and pass through the center of the sheet, and pass through the center of the sheet and the external power supply and the voice coil are rectified to improve the voice coil roll vibration, in the prior art, the through center sheet is generally located on the outer side of the voice coil, when the sound unit adopts big amplitude design, the through center sheet should have enough length in the air to avoid stress concentration and appear broken line, but in the sound unit of big voice coil architecture, the space left on the outer side of the voice coil is insufficient, and then the side magnetic steel or the through center sheet cannot be placed, leading to the performance cannot be further improved. UTILITY MODEL CONTENTS

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

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

[0006] Frame;

[0007] Magnetic circuit assembly, the magnetic circuit assembly is connected the frame, the magnetic circuit assembly includes yoke, side magnetic structure and at least one group of center magnetic part, each group of the center magnetic part includes two groups of interval arrangement center magnetic structure, 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 accommodating cavity communicates with the side of the center magnetic structure close to another group of the center magnetic structure, the yoke is equipped with boss, and the boss is located in the accommodating cavity;

[0008] Diaphragm assembly, the diaphragm assembly is connected the frame, and a plurality of rectangular voice coils are provided on the diaphragm assembly, and the rectangular voice coils are one-to-one corresponding with the center magnetic structure;

[0009] The centering branch, each of the center magnetic parts corresponds to the centering branch, the centering branch includes an intermediate part, both sides of the intermediate part are connected with cantilever parts, the cantilever parts are connected with fixed parts, the cantilever parts and the fixed parts are located in the accommodating cavity, the intermediate part is arranged corresponding to the long axis side of the two rectangular voice coils corresponding to the same group of center magnetic parts, the length direction of the intermediate part is consistent with the length direction of the long axis side of the rectangular voice coil, the end of the intermediate part is located outside the voice coil, the end of the intermediate part is provided with a first conduction pad in conduction with the voice coil, the fixed part is fixed on the boss, the intermediate part is fixed on the bottom surface of the rectangular voice coil, the centering branch is provided with a conduction circuit in conduction with the first conduction pad, and an external power supply is in conduction with the rectangular voice coil through the conduction circuit.

[0010] In an embodiment, the length of the intermediate part is greater than the length of the long axis side of the rectangular voice coil, and the end of the intermediate part protrudes relative to the end of the voice coil.

[0011] In an embodiment, the edge magnetic structure includes an edge Haisi and a plurality of edge magnetic steels, the edge magnetic steels connect the edge Haisi and the yoke, the edge Haisi connects the yoke, a plurality of the edge magnetic steels 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 of the two rectangular voice coils corresponding to the same group of center magnetic parts is respectively provided with the edge magnetic steel, the two edge magnetic steels have opposite magnetic poles, and the two edge magnetic steels form a gap corresponding to the gap between the two adjacent rectangular voice coils, and the gap constitutes a avoiding space for avoiding the end of the intermediate part.

[0012] In an embodiment, the accommodating cavity includes an accommodating section and a necked section in communication, the necked section is connected with the wall surface of the center magnetic structure away from the accommodating section, the cantilever part includes a straight section and a bent section, the bent section and the boss are located in the accommodating section, one end of the straight section is connected with the intermediate part, and the other end of the straight section passes through the necked section and is connected with the bent section.

[0013] 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, and the cover plate is arranged on the ball top and closes the window.

[0014] In an embodiment, the cantilever parts on both sides of the intermediate part form a symmetrical structure.

[0015] In an embodiment, a single fixed part connects the intermediate part through one or more cantilever parts.

[0016] In an embodiment, the centering bracket is a planar structure.

[0017] 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 fixing part is provided with a second conductive pad, the second conductive pad is conductive with the first conductive pad through the conductive circuit, the second conductive pad is conductive with the conductive part, and the bottom of the conductive part is exposed through the through hole.

[0018] In an embodiment, the centering bracket 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 fixing 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 on the bottom surface of the yoke, and the exposed part is provided with an exposed pad which is conductive with the first conductive pad through the conductive circuit.

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

[0020] The sound generating unit structure is novel, the sound generating unit can simultaneously adopt a large voice coil and a large amplitude design architecture, the voice coil can be larger, and the centering bracket can also have sufficient overhanging length, so that the acoustic performance of the sound generating unit is effectively improved. At the same time, the side magnetic structure outside the voice coil does not need to avoid the centering bracket, therefore, the overall volume of the side magnetic structure can be set larger, so that the acoustic performance of the sound generating 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 influence on the magnetic field of the sound generating unit itself, and is beneficial to guarantee the performance of the sound generating unit.

[0022] The sound generating unit has relatively few 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 be obtained according to the structures shown in these drawings without paying creative labor.

[0024] Figure 1 It is an explosion view of the sound generating unit of the embodiment one of the utility model;

[0025] Figure 2 It is a sectional view of the sound generating unit of the embodiment one of the utility modelFigure One ;

[0026] Figure 3 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure Two ;

[0027] Figure 4 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.

[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;

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

[0032] 4. Centering support; 41. Intermediate section; 42. Cantilever section; 421. Straight section; 422. Bending section; 43. Fixing 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] 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 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 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.

[0039] 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.

[0040] Embodiment one

[0041] Please refer to Figures 1 to 4The utility model discloses an embodiment one for: sounding unit, including basin frame 1, magnetic circuit subassembly 2, diaphragm subassembly 3 and centering support piece 4, magnetic circuit subassembly 2 and diaphragm subassembly 3 are connected respectively basin frame 1, magnetic circuit subassembly 2 includes yoke iron 21, side magnetic structure 22 and at least one group center magnetic part, and every group center magnetic part includes two groups interval setting 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, center magnetic structure 23 has the receiving cavity 231 that communicates its top surface, receiving cavity 231 communicates center magnetic structure 23 is close to another group center magnetic structure 23's one side, yoke iron 21 is equipped with boss 211, boss 211 is located in receiving cavity 231, diaphragm subassembly 3 is equipped with multiple rectangular voice coil 5, rectangular voice coil 5 with center magnetic structure 23 is set up one to one correspondence, and every group center magnetic part corresponds to have centering support piece 4, centering support piece 4 includes intermediate part 41, the both sides of intermediate part 41 are connected with cantilever part 42 respectively, cantilever part 42 is connected with fixed part 43, cantilever part 42 and fixed part 43 are located in receiving cavity 231 respectively, the length direction of intermediate part 41 is consistent with the length direction of the long axis side of rectangular voice coil 5, the end of intermediate part 41 is located at the outside of the voice coil, the end of intermediate part 41 is equipped with the first conduction pad that is conducted with the voice coil, fixed part 43 is fixed on boss 211, intermediate part 41 is fixed on the bottom surface of rectangular voice coil 5, centering support piece 4 is equipped with the conduction line that is conducted with the first conduction pad, and external power supply is conducted rectangular voice coil 5 through conduction line.

[0042] For the processing and manufacturing of centering support piece 4, in the embodiment, the centering support piece 4 is a planar structure. That is, the top surface of the intermediate part 41, the top surface of the cantilever part 42, and the top surface of the fixed part 43 are in the same plane, and the bottom surface of the intermediate part 41, the bottom surface of the cantilever part 42, and the bottom surface of the fixed part 43 are in another plane.

[0043] The length of the intermediate part 41 is greater than the length of the long axis side of the rectangular voice coil 5. When viewing the sounding unit from a top perspective, the end of the intermediate part 41 protrudes relative to the end of the voice coil, the first conduction pad is located at the end of the intermediate part 41, and the first conduction pad is welded in conduction with the voice coil.

[0044] The side magnetic structure 22 comprises a side Hua Si 221 and a plurality of side magnetic steel 222, the side magnetic steel 222 connects the side Hua Si 221 and the yoke 21, the side Hua Si 221 connects the yoke 1, optionally, the side Hua Si 221 and the yoke 1 are an integral structure of insert injection molding; a plurality of the side magnetic steel 222 is arranged in a ring frame structure, the center magnetic part is located in the ring frame structure; the outer side of the end of the two rectangular voice coils 5 corresponding to the same group of the center magnetic part is respectively provided with the side magnetic steel 222, the magnetic pole of the two side magnetic steels 222 is opposite, and the gap corresponding to the gap between the two adjacent rectangular voice coils 5 is formed between the two side magnetic steels 222, and the gap constitutes the avoiding space 223 avoiding the end of the intermediate part 41. The magnetic pole polarity of the two side magnetic steels 222 is opposite, which can prevent the side magnetic steel 222 from circulating to form a magnetic loop, and the circulation will cause the magnetic induction lines flowing to the magnetic gap to decrease, so the side magnetic steel 222 needs a gap design to reduce the influence of the circulation, and the gap between the two side magnetic steels 222 just serves as the avoiding space 223 of the end of the intermediate part 41.

[0045] The center magnetic structure 23 comprises a center Hua Si 233 and a center magnetic steel 232 connecting the center Hua Si 233 and the yoke 21, the accommodating cavity 231 comprises a first part provided on the center Hua Si 233 and a second part provided on the center magnetic steel 232, and the first part and the second part are in communication. In the embodiment, the accommodating cavity 231 comprises an accommodating section and a necked section in communication, one end of the necked section away from the accommodating section is communicated with the wall surface of the center magnetic structure 23, the cantilever part 42 comprises a straight section 421 and a bent section 422, the bent section 422 and the boss 211 are located in the accommodating section, one end of the straight section 421 is connected with the intermediate part 41, and the other end of the straight section 421 passes through the necked section and is connected with the bent section 422. It is not difficult to understand that in the embodiment, the accommodating cavity 231 is in the shape of a convex character, and the existence of the necked section can reduce the occupation of the volume of the center magnetic structure 23 by the accommodating cavity 231, so that the volume of the center magnetic structure 23 can be set larger, thereby improving the performance of the sound generating unit.

[0046] Optionally, the diaphragm assembly 3 comprises a cover plate 31, a ball top 32 and a sound film 33 arranged around the ball top 32, the sound film 33 is connected with the yoke 1, the ball top 32 is provided with a window, and the cover plate 31 is arranged on the ball top 32 and closes the window.

[0047] The cantilever parts 42 on both sides of the intermediate part 41 form a symmetrical structure. In the embodiment, the cantilever parts 42 on both sides of the intermediate part 41 are center-symmetrical, and in other embodiments, the cantilever parts 42 on both sides of the intermediate part 41 can also be plane-symmetrical.

[0048] In other embodiments, a single said fixed portion 43 connects the intermediate portion 41 through a plurality of said cantilever portions 42. In the present embodiment, a single said fixed portion 43 connects the intermediate portion 41 through one or more said cantilever portions 42. Compared with the multi-cantilever architecture, the single-cantilever architecture occupies less space, so that the volume of the center magnetic structure 23 can be set larger, thereby improving the performance of the sound unit.

[0049] In the present 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 fixed portion 43 is provided with a second conductive pad, the second conductive pad is conductive with the first conductive pad through the conductive circuit, the second conductive pad is conductive with the conductive part 212, and the bottom of the conductive part 212 is exposed through the through hole. In other embodiments, the centering sheet 4 further comprises a leading 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 leading portion is connected to the fixed portion 43, the other end of the leading portion is connected to the exposed portion through the via hole and the through hole and exposed outside the yoke 21, and the exposed portion is provided with an exposed pad which is conductive with the first conductive pad through the conductive circuit, so that the conductive part 212 is not needed.

[0050] The above is only an optional embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection range 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, and a centering sheet. The magnetic circuit assembly comprises a yoke, a side magnetic structure, and at least one set of center magnetic parts, each set of the center magnetic parts comprising two sets of center magnetic structures arranged at intervals, the center magnetic structures and the side magnetic structure being fixed to the yoke respectively, the center magnetic structures having accommodating cavities communicating with top surfaces of the center magnetic structures, the accommodating cavities communicating with one sides of the center magnetic structures close to another set of the center magnetic structures, the yoke being provided with a boss, and the boss being located in the accommodating cavities. The diaphragm assembly is provided with a plurality of rectangular voice coils, and the rectangular voice coils are arranged in one-to-one correspondence with the center magnetic structures. Each set of the center magnetic parts is respectively provided with the centering sheet, the centering sheet comprises an intermediate part, two sides of the intermediate part are respectively connected with cantilever parts, the cantilever parts are connected with fixed parts, the cantilever parts and the fixed parts are located in the accommodating cavities respectively, the intermediate part is arranged on a long axis side of two rectangular voice coils corresponding to the same set of the center magnetic parts, the length direction of the intermediate part is consistent with the length direction of the long axis side of the rectangular voice coil, the end of the intermediate part is located outside the voice coil, the end of the intermediate part is provided with a first conduction pad in conduction with the voice coil, the fixed part is fixed on the boss, the intermediate part is fixed on the bottom surface of the rectangular voice coil, the centering sheet is provided with a conduction circuit in conduction with the first conduction pad, and an external power supply conducts the rectangular voice coil through the conduction circuit. The length of the intermediate part is greater than the length of the long axis side of the rectangular voice coil, and the end of the intermediate part protrudes relative to the end of the voice coil.

2. 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 are connected with the side armature and the yoke, the side armature is connected with the yoke, a plurality of the side magnetic steels are arranged in a ring frame structure, and the center magnetic parts are located in the ring frame structure; the outer sides of the ends of two rectangular voice coils corresponding to the same set of the center magnetic parts are respectively provided with the side magnetic steels, the magnetic poles of the two side magnetic steels face opposite directions, a gap is formed between the two side magnetic steels, the gap corresponds to a gap between two adjacent rectangular voice coils, and the gap constitutes an avoiding space for avoiding the end of the intermediate part.

3. The sound producing unit of claim 2, wherein: The accommodating cavities comprise accommodating sections and necked sections in communication, one end of the necked section away from the accommodating section communicates with the wall surface of the center magnetic structure, the cantilever parts comprise straight sections and bent sections, the bent sections and the boss are located in the accommodating sections, one end of the straight section is connected with the intermediate part, and the other end of the straight section passes through the necked section and is connected with the bent section.

4. The sound producing unit of claim 1, wherein: The diaphragm assembly comprises a cover plate, a spherical top, and a sound membrane arranged around the spherical top, the sound membrane is connected with the yoke, the spherical top is provided with an opening, and the cover plate is arranged on the spherical top and seals the opening.

5. The sound producing unit of claim 1, wherein: The cantilever parts on both sides of the intermediate part form a symmetrical structure.

6. The sound producing unit of claim 1, wherein: One fixed part is connected with the intermediate part through one or more cantilever parts.

7. The sound producing unit of claim 1, wherein: The centering sheet is a planar structure.

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 fixing part is provided with a second conductive pad, the second conductive pad is conductive with the first conductive pad through the conductive circuit, the second conductive pad is conductive with the conductive part by welding, 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 fixing 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 on the bottom surface of the yoke, and the exposed part is provided with an exposed pad which is conductive with the first conductive pad through the conductive circuit.

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