Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a basin stand, a vibrating diaphragm assembly, a magnetic circuit assembly, a rubber table and a centering disk, and is characterized in that the vibrating diaphragm assembly is connected with the basin stand; the magnetic circuit assembly is connected with the basin frame, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the magnetic circuit assembly is provided with a communicating hole for communicating the bottom surface of the yoke with the top surface of the central magnetic structure; the glue table is arranged at the communicating hole and connected with the magnetic circuit assembly, and a hot melting column is arranged on the glue table; the centering disk comprises an inner mounting part, a cantilever part, an ascending part and an outer mounting part which are connected in sequence, the inner mounting part and the rubber table are fastened and connected through a mushroom head formed by hot melting of the hot melting column, and the outer mounting part is connected with the vibrating diaphragm assembly. The sounding unit is novel and stable in structure and good 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 make full use of the internal space of sound unit, the volume of the edge magnetic structure can be set larger, and at the same time, the risk of voice coil lead breakage is reduced, and part of the sound unit adopts voice coil inside conduction structure (centering sheet is located inside voice coil).

[0003] However, in order to reduce the occupation of the internal space of the center magnetic structure, the fixing area of the centering sheet inner fixing part is relatively small, thereby leading to reduced fixing effect, and after drop and environmental experiments, the centering sheet inner fixing part and the boss are separated due to insufficient fixing allowance. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that a structure stable inside conduction type sound unit is provided.

[0005] In order to solve the above technical problem, the utility model adopts the technical scheme that a sound unit comprises:

[0006] A yoke;

[0007] A diaphragm assembly connected to the yoke;

[0008] A magnetic circuit assembly connected to the yoke, comprising a yoke and a center magnetic structure arranged on the yoke, and the magnetic circuit assembly has a communication hole communicating the bottom surface of the yoke and the top surface of the center magnetic structure;

[0009] An adhesive table arranged at the communication hole and connected to the magnetic circuit assembly, and a hot melt column is arranged on the adhesive table;

[0010] A centering sheet, comprising an inner mounting part, a cantilever part, an ascending part and an outer mounting part connected in sequence, the inner mounting part is fastened and connected to the mushroom head formed by hot melting the hot melt column of the adhesive table, and the outer mounting part is connected to the diaphragm assembly.

[0011] In an embodiment, the centering sheet further comprises an extension part and a conduction part, the extension part connects the inner mounting part and the conduction part, the adhesive table has a perforation for the extension part to pass through, the conduction part is exposed outside the sound unit, an inner pad is arranged on the outer mounting part, and an outer pad of the exposed surface of the conduction part is in conduction with the inner pad.

[0012] In an embodiment, the bottom surface of the adhesive table is provided with a pit, and the conduction part is located in the pit.

[0013] In an embodiment, the bottom surface of the yoke is provided with a wiring groove communicating with the recess.

[0014] In an embodiment, the inner mounting portion is connected with the two cantilever portions at opposite sides.

[0015] In an embodiment, the center magnetic structure comprises a center magnetic steel and a center dust shield, the center magnetic steel connects the center dust shield and the yoke, the rubber platform and the center magnetic steel are an integrated structure formed by one-piece injection molding; or, the rubber platform and the yoke are an integrated structure formed by one-piece injection molding.

[0016] In an embodiment, the bottom surface of the inner mounting portion is gluedly connected with the top surface of the rubber platform.

[0017] In an embodiment, the inner mounting portion has one or more hot melt holes through which the hot melt column passes.

[0018] In an embodiment, the hot melt hole is circular, elliptical or polygonal.

[0019] In an embodiment, the diaphragm assembly comprises a sound film and a ball top, the sound film connects the ball top and the yoke, and the outer mounting portion is connected to the ball top.

[0020] The sound generating unit has the following beneficial effects: the sound generating unit adopts the inside lead-through structure of the voice coil, so that the overall volume of the side magnetic structure can be set larger, thereby improving the performance of the sound generating unit; the sound generating unit has a novel structure, the rubber platform in the centering sheet and the communication hole are fastened and connected through the hot melt column, the connection strength of the rubber platform and the centering sheet is effectively improved, the risk of accidental separation of the inner mounting portion of the centering sheet from the rubber platform is reduced, the structural stability of the sound generating unit is improved, and the contact area of the rubber platform and the inner mounting portion can be set smaller, thereby leaving more space for the cantilever portion, allowing the sound generating unit to vibrate with large amplitude, and the cross-sectional size of the communication hole region on the center magnetic structure can be set smaller, thereby ensuring the magnetic field strength of the center magnetic structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] 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 embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0022] Figure 1 The exploded view of the sound unit of the utility model embodiment one is shown in the figure;

[0023] Figure 2 The cross-sectional view of the sound unit of the utility model embodiment one is shown in the figure;

[0024] Figure 3 The structure diagram of the centering support sheet in the sound unit of the utility model embodiment one is shown in the figure;

[0025] Figure 4 The structure diagram of the sound unit of the utility model embodiment two after hiding the cover plate is shown in the figure.

[0026] Explanation of the reference numerals:

[0027] 1, the stand;

[0028] 2, the diaphragm assembly; 21, the sound film; 22, the ball top; 221, the support arm; 23, the cover plate;

[0029] 3, the magnetic circuit assembly; 31, the yoke; 32, the center magnetic structure; 321, the center magnetic steel; 322, the center Hua Si; 33, the edge magnetic structure; 34, the communication hole;

[0030] 4, the voice coil;

[0031] 5, the glue table; 51, the hot melt column; 52, the perforation; 53, the pit;

[0032] 6, the centering support sheet; 61, the inner mounting part; 611, the hot melt hole; 62, the cantilever part; 63, the rising part; 64, the outer mounting part; 65, the extension part; 66, the lead-through part. DETAILED DESCRIPTION

[0033] The utility model aims to realize, the function characteristics and the advantages will combine the embodiment, and the further explanation is made with reference to the drawings.

[0034] The technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making the creative labor belong to the scope of the utility model protection.

[0035] It should be noted that if the utility model embodiment has involved directionality indication such as up, down, left, right, front, back, the directionality indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture such as shown in the drawings, if the specific posture changes, then the directionality indication also changes accordingly.

[0036] 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.

[0037] 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 unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0038] 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 inside 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.

[0039] Embodiment one

[0040] Please refer to Figures 1 to 3 The embodiment one of the present application is: a sound unit, comprising a frame 1, a diaphragm assembly 2, a magnetic circuit assembly 3, a voice coil 4, a glue table 5 and a centering support sheet 6, the voice coil 4 is connected with the diaphragm assembly 2, the diaphragm assembly 2 and the magnetic circuit assembly 3 are connected with the frame 1 respectively, the magnetic circuit assembly 3 comprises a yoke 31 and a center magnetic structure 32 and a side magnetic structure 33 arranged on the yoke 31 respectively, the center magnetic structure 32 and the side magnetic structure 33 form a magnetic gap for the voice coil 4 to move, the magnetic circuit assembly 3 has a communication hole 34 communicating the bottom surface of the yoke 31 and the top surface of the center magnetic structure 32; the glue table 5 is arranged at the communication hole 34 and connected with the magnetic circuit assembly 3, the glue table 5 is provided with a hot melt column 51; the centering support sheet 6 comprises an inner mounting portion 61, a cantilever portion 62, an ascending portion 63 and an outer mounting portion 64 connected in sequence, the inner mounting portion 61 and the glue table 5 are fastened and connected through the mushroom head formed by hot melting the hot melt column 51, the outer mounting portion 64 is connected with the diaphragm assembly 2, and the inner mounting portion 61 and the cantilever portion 62 are located in the communication hole 34.

[0041] In some embodiments, the centering piece 6 can be made of non-conductive material, but preferably, the centering piece 6 is made of flexible circuit board, and the voice coil 4 is electrically connected to the outer mounting portion 64.

[0042] In one or more embodiments, the glue platform 5 is embedded with a metal conductive part that electrically connects the external power supply to the centering piece 6, and in this case, the glue platform 5 is made of insulating material. In this embodiment, the centering piece 6 further includes an extension portion 65 and a conductive portion 66, the extension portion 65 connects the inner mounting portion 61 and the conductive portion 66, the glue platform 5 has a through hole 52 for the extension portion 65 to pass through, and the conductive portion 66 is exposed to the sound generating unit. The outer mounting portion 64 is provided with an inner pad for electrically connecting to the lead wire of the voice coil 4, and the exposed surface of the conductive portion 66 is provided with an outer pad for electrically connecting to the inner pad. As a preferred embodiment, the inner mounting portion 61, the cantilever portion 62, the rising portion 63, the outer mounting portion 64, the extension portion 65 and the conductive portion 66 are integrally formed as an integrated structure.

[0043] In order to reduce the damage probability of the conductive portion 66, the bottom surface of the glue platform 5 is provided with a recess 53, and the conductive portion 66 is located in the recess 53. In order to facilitate the wiring of the external power supply, the bottom surface of the yoke 31 is provided with a wiring groove that communicates with the recess 53, and the wiring of the external power supply extends into the recess 53 through the wiring groove and is welded to the outer pad.

[0044] In this embodiment, the number of centering pieces 6 is one, and the inner mounting portion 61 of the centering piece 6 is respectively connected to the cantilever portion 62 on both sides, and the two cantilever portions 62 are centrally symmetric to balance the stress of the diaphragm assembly 2. In other embodiments, the centering pieces 6 can also be two or more symmetrically arranged.

[0045] In this embodiment, the edge magnetic structure 33 includes an edge magnetic steel and an edge Halsier, and the edge magnetic steel connects the edge Halsier and the yoke 31. In other embodiments, the edge magnetic structure 33 can also be replaced by a flange formed by bending part of the yoke 31.

[0046] The center magnetic structure 32 includes a center magnetic steel 321 and a center Halsier 322, and the center magnetic steel 321 connects the center Halsier 322 and the yoke 31. The glue platform 5 and the center magnetic steel 321 are integrally formed as an integrated structure, or the glue platform 5 and the yoke 31 are integrally formed as an integrated structure.

[0047] In order to further improve the stability of the connection between the inner mounting portion 61 and the glue platform 5, the bottom surface of the inner mounting portion 61 is adhesively connected to the top surface of the glue platform 5, which can further improve the structural stability of the sound generating unit.

[0048] The inner mounting portion 61 has hot melt holes 611 for the hot melt columns 51 to pass through, the number of the hot melt holes 611 is one or more, in the embodiment, the number of the hot melt holes 611 is one, and the hot melt holes 611 are arranged in the central region of the inner mounting portion 61.

[0049] The hot melt holes 611 are circular, elliptical or polygonal, and the polygonal shape includes but is not limited to triangular, rectangular, pentagonal, hexagonal and the like.

[0050] The diaphragm assembly 2 includes a sound film 21 and a ball top 22, the sound film 21 connects the ball top 22 and the basket 1, and the outer mounting portion 64 and the voice coil 4 are respectively connected on the ball top 22, in a specific product, the ball top 22 is provided with a window, the window is provided with a cover plate 23, the edge of the window has a downwardly extending support arm 221, the support arm 221 is connected to the end of the cantilever portion 62 away from the inner mounting portion 61, and the existence of the support arm 221 can make the centering support sheet 6 better support the diaphragm assembly 2.

[0051] Embodiment two

[0052] Please refer to Figure 4 The embodiment two of the utility model is the parallel technical scheme of the embodiment one, and the difference between the embodiment two and the embodiment one is that the number of the hot melt holes 611 on the inner mounting portion 61 is two, and the glue table 5 has the hot melt column 51 corresponding to the two hot melt holes 611.

[0053] The above is only the 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 application relates to a loudspeaker unit. A frame; A diaphragm assembly connected to the frame; A magnetic circuit assembly connected to the frame, the magnetic circuit assembly comprising a yoke and a center magnetic structure arranged on the yoke, the magnetic circuit assembly having a communication hole communicating between a bottom surface of the yoke and a top surface of the center magnetic structure; An adhesive table arranged at the communication hole and connected to the magnetic circuit assembly, the adhesive table being provided with a hot melt column; A centering sheet comprising an inner mounting portion, a cantilever portion, an ascending portion and an outer mounting portion connected in sequence, the inner mounting portion being fastened and connected to a mushroom head formed by hot melting the hot melt column, and the outer mounting portion being connected to the diaphragm assembly.

2. The sound producing unit of claim 1, wherein: The centering sheet further comprises an extension portion and a lead-through portion, the extension portion connecting the inner mounting portion and the lead-through portion, the adhesive table being provided with a through hole for the extension portion to pass through, the lead-through portion being exposed outside the loudspeaker unit, the outer mounting portion being provided with an inner solder pad, and an exposed surface of the lead-through portion being provided with an outer solder pad in lead-through connection with the inner solder pad.

3. The sound producing unit of claim 2, wherein: The adhesive table is provided with a recess on a bottom surface, and the lead-through portion is located in the recess.

4. The sound producing unit of claim 3, wherein: The yoke is provided with a wiring groove in communication with the recess.

5. The sound producing unit of claim 1, wherein: In the centering sheet, the inner mounting portion is respectively connected with the cantilever portion on opposite sides, and the two cantilever portions are centrally symmetrical.

6. The sound producing unit of claim 1, wherein: The center magnetic structure comprises a center magnetic steel and a center dust shield, the center magnetic steel connecting the center dust shield and the yoke, and the adhesive table and the center magnetic steel being an integrated structure formed by one-piece injection molding; or the adhesive table and the yoke being an integrated structure formed by one-piece injection molding.

7. The sound producing unit of claim 1, wherein: The bottom surface of the inner mounting portion is adhesively connected to the top surface of the adhesive table.

8. The sound producing unit of claim 1, wherein: The inner mounting portion is provided with one or more hot melt holes for the hot melt column to pass through.

9. The sound producing unit of claim 8, wherein: The hot melt hole is circular, elliptical or polygonal.

10. The sound producing unit of claim 1, wherein: The diaphragm assembly comprises a sound film and a ball top, the sound film being connected to the ball top and the frame, and the outer mounting portion being connected to the ball top.

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