A loudspeaker module

Abstract

The utility model provides a kind of loudspeaker module, belong to acoustic technical field, including module upper shell, module lower shell, loudspeaker single body, the rear cavity formed by the loudspeaker single body with the module upper shell, the module lower shell is filled with BASS granule, the loudspeaker single body includes basin frame, magnetic cover, voice coil, the magnetic cover includes bottom, the bottom is equipped with the sidewall extending upwards, the sidewall and / or the bottom is equipped with a plurality of first air guide hole, the diameter of the first air guide hole near one end of the BASS granule is less than the diameter of the first air guide hole away from one end of the BASS granule;The rear cavity of the utility model is filled with BASS expansion, without again buckling steel net to insulate BASS granule, its loudspeaker single body performance and module performance correspondence are good, solve the problem that the loudspeaker Q value and sensitivity change and module performance correspondence are poor due to external again buckling steel net or mesh cloth after traditional full filling single body assembly module, simplify module manufacturing process, improve assembly efficiency, reduce production cost.

Description

Technical Field

[0001] This utility model relates to a speaker module. Background Technology

[0002] With the development of portable electronic device technology, people have increasingly higher requirements for the sound effects of portable electronic devices such as mobile phones and laptops with external sound output. In order to improve the frequency response performance of electronic device speakers, speaker units are assembled in modules, and the rear cavity of the module is filled with BASS particles that expand the volume of the rear cavity.

[0003] Currently, there are generally two design schemes for speaker modules to prevent the filler bass particles from entering the magnetic gap inside the speaker. One is to set up an independent filling area in the rear cavity of the module and use hot-melt mesh to hold the bass particles; the other is to cover the speaker unit with a steel mesh or mesh cloth with small holes, the size of which is smaller than the size of the filler particles. This separates the speaker from the filler particles in the module, and the module can achieve full filling of the rear cavity space.

[0004] The first method is complicated in terms of manufacturing process, with a small amount of filling material in the module's rear cavity, resulting in limited effect on expanding the rear cavity. The second method requires additional steel mesh or mesh fabric to be attached to the outside of the module after the speaker unit test is completed, which affects the sensitivity and Q value of the speaker unit. This leads to a significant difference between the module's test trend and the speaker unit test trend, and the process assembly is complicated and difficult. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a speaker module.

[0006] The purpose of this utility model is achieved through the following technical measures: a loudspeaker module, including a module upper shell, a module lower shell, and a loudspeaker unit, wherein the rear cavity formed by the loudspeaker unit, the module upper shell, and the module lower shell is filled with BASS particles, and the loudspeaker unit includes a frame, a magnetic cover, and a voice coil, characterized in that: the magnetic cover includes a bottom, the bottom is provided with an upwardly extending sidewall, and the sidewall and / or the bottom is provided with a plurality of first air guide holes, wherein the diameter of the first air guide hole near the BASS particles is smaller than the diameter of the end away from the BASS particles.

[0007] As an improvement, a rear acoustic hole is also provided on the bottom, and an air guide plate is also provided on the bottom opposite to the rear acoustic hole. The air guide plate is provided with a plurality of second air guide holes, and the diameter of the second air guide hole near the end of the BASS particle is smaller than the diameter of the end away from the BASS particle.

[0008] As a further improvement, the speaker unit is square, and at least four rear sound holes are provided, corresponding to the four corners of the voice coil.

[0009] As a further improvement, the sum of the total areas of all the second air guide holes shall not be less than 30% to 50% of the sum of the total areas of all the rear acoustic holes.

[0010] As a further improvement, the diameters of the first and second air guide holes near the ends of the BASS particles are both less than two-thirds the diameter of the BASS particles.

[0011] As a further improvement, the draft angles of both the first and second air guide holes are 45° to 90°.

[0012] As a further improvement, the external dimensions of the sidewall are smaller than the external dimensions of the basin stand.

[0013] As a further improvement, the opening of the rear acoustic hole is L-shaped.

[0014] As a further improvement, the length of the opening is less than or equal to two-thirds of the length corresponding to the major axis of the voice coil, or the length of the opening is less than or equal to the length corresponding to the minor axis of the voice coil.

[0015] As a further improvement, the width of the opening is less than or equal to 1.5 times the voice coil width and greater than or equal to 1.0 times the voice coil width.

[0016] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: First: This new type of loudspeaker unit can be directly assembled into the module. The rear cavity is fully filled with BASS for expansion, eliminating the need for a steel mesh to isolate the BASS particles. The performance of the loudspeaker unit corresponds well with the performance of the module. This solves the problem of poor correspondence between the loudspeaker Q value and sensitivity changes and the module performance caused by the external steel mesh or mesh cloth after assembling the module with the traditional fully filled unit. It simplifies the module manufacturing process, improves assembly efficiency, and reduces production costs. Second: Ordinary loudspeaker etched openings are generally cylindrical, and airflow flows out from the rear cavity of the loudspeaker through the opening with little change in flow velocity. In this new invention, both the air guide hole and the through hole are inverted flared shapes that are narrower at the top and wider at the bottom. When airflow enters the air guide hole and the through hole, the cross-sectional area of ​​the hole gradually narrows along the length direction, and the cross-sectional area is the narrowest at the contact point with the BASS particles. The gas is squeezed through the relatively narrow channel, and the airflow velocity increases. The changing cross-sectional area accelerates the airflow exchange efficiency, and the airflow directionality can be adjusted according to the opening draft angle, resulting in stronger directionality.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Appendix Figure 1 This is an exploded view of the structure of this utility model; Appendix Figure 2 This is a cross-sectional view of the structure of this utility model; Appendix Figure 3 This is a schematic diagram of the structure of the speaker unit described in this utility model; Appendix Figure 4 It is attached Figure 3 Another perspective illustration; Appendix Figure 5 This is an exploded view of the speaker unit of this utility model; Appendix Figure 6 This is a cross-sectional schematic diagram of the speaker unit described in this utility model; Appendix Figure 7 It is attached Figure 6 Enlarged structural diagram at point A; Appendix Figure 8 This is a schematic diagram of the magnetic shield structure described in this utility model; Appendix Figure 9 This is a schematic diagram of the air guide plate structure described in this utility model; Appendix Figure 10 This is a schematic diagram of the airflow changes in the first and second air guide holes of this utility model. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example: As attached Figure 1 -Appendix Figure 10 As shown, a speaker module includes an upper module shell 1, a lower module shell 2, and a speaker unit 3. The speaker unit 3 is square, and the rear cavity formed by the speaker unit 3, the upper module shell 1, and the lower module shell 2 is filled with BASS particles.

[0024] The loudspeaker unit 3 includes a frame 31, which is a metal frame. A magnetic circuit assembly is mounted on the frame 31. The magnetic circuit assembly includes a magnetic cover 32 fixedly connected to the frame 31, with magnets 33 and pole pieces 34 bonded inside the magnetic cover 32. It also includes a vibration assembly, which includes a diaphragm 35 bonded to the frame 31, a dome 36, a voice coil 37, and a support 38 (as shown in the attached image). Figure 5 (As shown).

[0025] The magnetic cover 32 includes a bottom 321, and the bottom 321 has an upwardly extending sidewall 322. The sidewall 322 has a plurality of first air guide holes 323. The first air guide holes 323 can be evenly distributed throughout the entire sidewall 322, or distributed on a part of the sidewall 322. Alternatively, the sidewall 322 and the bottom 321 can both have a plurality of first air guide holes 323, or the bottom 321 can have a plurality of first air guide holes 323. The distribution position of the first air guide holes 323 is determined according to the actual situation of the product. The diameter of the first air guide hole 323 near the BASS particle is smaller than the diameter of the end away from the BASS particle. The diameter of the first air guide hole 323 near the BASS particle is less than two-thirds of the diameter of the BASS particle, ensuring that the BASS particle will not pass through the first air guide hole 323 and enter the speaker.

[0026] The bottom 321 is also provided with four rear sound holes 324, which correspond to the four corners of the voice coil 37. Of course, there can also be eight or more rear sound holes 324, with two or more rear sound holes 324 corresponding to each corner. The bottom 321 is also provided with an air guide plate 39 opposite to the rear sound holes 324. The air guide plate 39 is provided with several second air guide holes 391. The diameter of the second air guide hole 391 near the BASS particle is smaller than the diameter of the end away from the BASS particle. The diameter of the second air guide hole 391 near the BASS particle is less than two-thirds of the diameter of the BASS particle, ensuring that the BASS particle will not pass through the second air guide hole 391 and enter the speaker.

[0027] The rear sound hole 324 has an L-shaped opening. The width of the opening is less than or equal to 1.5 times the width of the voice coil and greater than or equal to 1.0 times the width of the voice coil. The length of the opening is less than or equal to two-thirds of the length corresponding to the major axis of the voice coil, or the length of the opening is less than or equal to the length corresponding to the minor axis of the voice coil.

[0028] The sum of the total areas of all the second air guide holes 391 shall not be less than 30% to 50% of the sum of the total areas of all the rear acoustic holes 324, and we choose 40% as the optimal value.

[0029] The draft angles of the first air guide hole 323 and the second air guide hole 391 are both 45°~90°, with 60° being the optimal draft angle. The airflow directionality can be adjusted according to the draft angle, resulting in stronger directionality.

[0030] The outer dimensions of the side wall 322 are smaller than those of the basin frame 31. As a result, after assembly, the magnetic cover 32 and the basin frame 31 are misaligned by a certain size around their perimeter. The misalignment size in the XY direction is one-third to one times the bending thickness of the magnetic cover 32, and the gap in the Z direction is less than or equal to two-thirds of the diameter of the filling BASS powder particles. After the magnetic cover 32 and the basin frame 31 are fastened together, the gap in the Z direction is sealed by laser welding or glue. The misaligned receiving surface is used as a platform for the connection of glue and laser melting material.

[0031] As attached Figure 10 As shown, the theoretical impact of differences in opening methods on airflow is introduced respectively: a. The etched openings of ordinary loudspeakers are generally cylindrical, and the airflow flows out through the opening from the rear cavity of the loudspeaker, with little change in flow velocity.

[0032] b. In this novel design, both the air guide hole 91 and the through hole 24 are inverted funnel-shaped openings, narrower at the top and wider at the bottom. As airflow enters the air guide hole 91 and the through hole 24, the cross-sectional area gradually narrows along the length, reaching its narrowest point at the contact with the BASS particles. This forces the gas through the relatively narrow channel, increasing the airflow velocity. The varying cross-sectional area accelerates airflow exchange efficiency, and the airflow directionality is adjustable according to the opening draft angle, resulting in stronger directionality. The draft angle of the air guide hole 91 and the through hole 24 can be designed between 45° and 90°. Compared to design a, this design further enhances airflow exchange efficiency due to the varying cross-sectional area, and the airflow directionality is adjustable according to the opening draft angle, resulting in stronger directionality.

[0033] c. The top-wide and bottom-narrow flared design has the opposite effect of b. The airflow slows down when it comes into contact with the BASS particle surface, affecting the gas exchange efficiency.

[0034] In summary, the new speaker unit 3 can be directly assembled into the module for full-cavity bass expansion without the need for a steel mesh to isolate the bass particles. The speaker performance is highly consistent with the performance after module assembly, solving the problem of poor correspondence between speaker Q value and sensitivity changes and module performance caused by the external steel mesh or mesh fabric after assembling traditional full-cavity speaker units. This simplifies the module manufacturing process, improves assembly efficiency, and reduces production costs.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loudspeaker module, comprising an upper module shell, a lower module shell, and a loudspeaker unit, wherein the rear cavity formed by the loudspeaker unit, the upper module shell, and the lower module shell is filled with BASS particles, and the loudspeaker unit comprises a frame, a magnet, and a voice coil, characterized in that: The magnetic cover includes a bottom, the bottom having an upwardly extending sidewall, and the sidewall and / or the bottom having a plurality of first air guide holes, the diameter of the first air guide holes near the BASS particle being smaller than the diameter of the end away from the BASS particle; the bottom also has a rear acoustic hole, and the bottom has an air guide plate opposite to the rear acoustic hole, the air guide plate having a plurality of second air guide holes, the diameter of the second air guide holes near the BASS particle being smaller than the diameter of the end away from the BASS particle.

2. A speaker module according to claim 1, characterized in that: The speaker unit is square, and at least four rear sound holes are provided, corresponding to the four corners of the voice coil.

3. A speaker module according to claim 1, characterized in that: The sum of the total areas of all the second air guide holes shall not be less than 30% to 50% of the sum of the total areas of all the rear acoustic holes.

4. A speaker module according to claim 1, characterized in that: The diameters of the first and second air guide holes near the ends of the BASS particles are both less than two-thirds the diameter of the BASS particles.

5. A speaker module according to claim 1, characterized in that: The draft angles of the first air guide hole and the second air guide hole are both 45°~90°.

6. A speaker module according to claim 1, characterized in that: The external dimensions of the sidewall are smaller than the external dimensions of the basin stand.

7. A speaker module according to claim 1, characterized in that: The opening of the rear acoustic hole is L-shaped.

8. A speaker module according to claim 7, characterized in that: The length of the opening is less than or equal to two-thirds of the length corresponding to the major axis of the voice coil, or the length of the opening is less than or equal to the length corresponding to the minor axis of the voice coil.

9. A speaker module according to claim 8, characterized in that: The width of the opening is less than or equal to 1.5 times the voice coil width and greater than or equal to 1.0 times the voice coil width.

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