Loudspeaker module and electronic equipment

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, and particularly relates to a loudspeaker module and electronic equipment, the loudspeaker module comprises a shell, a sound production monomer, a metal sheet and connecting glue, the shell is provided with an accommodating cavity, a through hole and a sound outlet hole, and the through hole and the sound outlet hole are communicated with the accommodating cavity; the metal sheet covers the through hole, and the periphery of the metal sheet is embedded in the shell; the sound production single body is accommodated in the accommodating cavity, the sound production single body, the metal sheet and the shell jointly enclose to form a front cavity, and the front cavity is communicated with the sound outlet hole; and the connecting glue is arranged at the connecting edge, close to the sound outlet hole, of the shell and the metal sheet. According to the structure provided by the utility model, the connection strength of the metal sheet and the shell can be effectively improved, so that the resonance is reduced, the phenomenon that a high-frequency performance curve of the loudspeaker module is folded is effectively improved, and the stability of the performance of the loudspeaker module is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electroacoustic conversion, and specifically relates to a loudspeaker module and electronic equipment. Background Art

[0002] With the development of technology, electronic devices such as mobile phones and tablets are becoming more and more portable and ultra-thin, but this ultra-thin structure drives the speaker module to become ultra-thin.

[0003] In the related art, in order to achieve an ultra-thin design of the speaker module, large-area steel sheets or high-strength aluminum sheets are generally used in the front and rear cavities of the speaker module. If the steel sheets or aluminum sheets are not sufficiently constrained, it is very easy to cause product resonance, resulting in high-frequency discounts in the FR and THD curves, affecting the high-frequency performance of the product.

[0004] Therefore, in view of the above shortcomings, the present utility model is proposed. Utility Model Content

[0005] The utility model aims to provide a speaker module and an electronic device to solve the problem in the prior art that the speaker module uses steel sheets or high-strength aluminum sheets, which causes resonance and affects the high-frequency performance of the product.

[0006] The first aspect of the utility model provides a speaker module, comprising:

[0007] A shell body, wherein the shell body is formed with a receiving cavity and a through hole and a sound outlet hole communicated with the receiving cavity;

[0008] A metal sheet, the metal sheet covers the through hole and the periphery of the metal sheet is embedded in the housing;

[0009] A sound-generating unit, the sound-generating unit is contained in the containing cavity, the sound-generating unit, the metal sheet, and the shell together enclose a front cavity, and the front cavity is connected to the sound outlet;

[0010] Connecting glue is provided at the connecting edge between the shell and the metal sheet adjacent to the sound outlet.

[0011] The speaker module provided by the utility model may also have the following additional technical features:

[0012] In a specific implementation manner of the utility model, the connection glue is provided along the circumference of the through hole at the connection between the shell and the metal sheet.

[0013] In a specific implementation manner of the present invention, the connecting adhesive is in an integral ring shape or is arranged in separate parts at intervals.

[0014] In a specific implementation manner of the utility model, the cross section of the connecting adhesive is triangular or fan-shaped.

[0015] In a specific embodiment of the utility model, the shell includes an upper shell and a lower shell assembled with the upper shell to form the accommodating cavity, the sound unit, the upper shell and the metal sheet form the front cavity, the sound hole is formed on the side of the upper shell, and the through hole is formed on a side of the upper shell away from the lower shell.

[0016] In a specific implementation manner of the utility model, a boss is formed on the inner periphery of the through hole, and the sound-emitting unit is mounted on the boss.

[0017] In a specific implementation manner of the present invention, the thickness of the metal sheet is 0.1 mm to 0.2 mm.

[0018] In a specific implementation manner of the present invention, the metal sheet is made of 301H, 301, 304 steel or magnesium-aluminum alloy.

[0019] In a specific embodiment of the present invention, at least part of the outer edge of the metal sheet is formed with a warping portion, and the warping portion is embedded in the shell; and / or

[0020] The metal sheet and the housing are integrally formed by injection molding.

[0021] In a specific implementation manner of the present invention, the connecting glue is located on a side of the metal sheet facing the receiving cavity; and / or

[0022] The connecting glue is located on a side of the metal sheet away from the receiving cavity.

[0023] A second aspect of the utility model provides an electronic device, comprising the speaker module described in any one of the above.

[0024] The speaker module provided by the utility model is provided with a shell and a sound-emitting unit housed in the shell and capable of enclosing with the shell to form a front cavity. In this way, the vibration sound waves of the sound-emitting unit can be transmitted to the outside of the speaker module by using the sound outlet hole connected to the front cavity, thereby realizing the sound-emitting function of the speaker module. At the same time, since the front cavity is surrounded by the metal sheet, the sound-emitting unit and the shell, and the thickness of the metal sheet is less than the thickness of the corresponding area of ​​the shell, the volume of the front cavity can be increased by using the thinned thickness of the metal sheet relative to the shell, thereby improving the sound quality. In addition, since a connecting glue is provided at the connecting edge of the metal sheet near the sound outlet hole, the connection strength between the metal sheet near the sound outlet hole and the shell can be improved, and the resonance of the sound-emitting unit can be reduced, thereby ensuring the high-frequency performance of the speaker module. Based on the above arrangement, the phenomenon of the high-frequency performance curve of the speaker module being discounted can be effectively improved, and the stability of the performance of the speaker module can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a structural exploded view of the speaker module in the embodiment of the utility model;

[0027] Figure 2 A cross-sectional view of a speaker module in one embodiment of the utility model;

[0028] Figure 3-4 for Figure 2 The upper shell structure diagram of the middle speaker module;

[0029] Figure 5 A cross-sectional view of a speaker module in another embodiment of the present invention;

[0030] Figure 6-7 for Figure 5 The upper shell structure diagram of the middle speaker module.

[0031] Attached mark description:

[0032] 100-speaker module;

[0033] 10-shell, 11-upper shell, 12-lower shell, 13-through hole, 14-boss, 15-injection hole, 16-cover plate, 17-sound outlet hole, 18-front cavity, 19-rear cavity;

[0034] 20-sound unit; 30-metal sheet, 31-warping part, 40-connecting glue. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0036] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0037] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0038] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0039] In order to maintain and improve the performance of the speaker module, the relevant technologies are adjusted in the following aspects:

[0040] 1) Improve the strength of the material, for example, use 301H, 301 (3 / 4H), 304 (3 / 4H) stainless steel to form the metal sheet. These materials have certain benefits on high-frequency acoustic performance, but they cannot completely eliminate resonance. Or use high-strength aluminum, whose main material is magnesium-aluminum alloy, to form the metal sheet, but the magnesium-aluminum alloy material itself is weak, and high-strength aluminum of different strengths has no obvious improvement on high-frequency acoustic performance;

[0041] 2) When testing the speaker module, adding foam to the tooling under the front cavity can effectively improve the resonance of the steel sheet; however, if the speaker is installed in the whole machine for testing without the back cover, the high frequency of the product will still be discounted and the test curve will be NG, so this method can only be used as an external improvement measure and has great limitations.

[0042] The embodiment of the utility model provides a speaker module 100, which can be used in electronic devices. Specifically, the electronic device can be a mobile phone, a tablet, a PC, etc.

[0043] Reference Figure 1-7 The speaker module 100 provided in this embodiment includes a shell 10, a sound unit 20, a metal sheet 30 and a connecting glue 40, wherein the shell 10 is formed with a receiving cavity and a through hole 13 and a sound outlet hole 17 connected to the receiving cavity; the metal sheet 30 covers the through hole 13 and the periphery of the metal sheet 30 is embedded in the shell 10; the sound unit 20 is received in the receiving cavity, and the sound unit 20, the metal sheet 30 and the shell 10 are jointly enclosed to form a front cavity 18, and the front cavity 18 is connected to the sound outlet hole 17; a connecting glue 40 is provided at the connecting edge of the shell 10 and the metal sheet 30 near the sound outlet hole 17.

[0044] Specifically, the shell 10 is made of plastic and is a roughly rectangular shell 10 structure. The inner cavity of the shell 10 structure is formed as a receiving cavity. The shell 10 structure is also provided with a through hole 13 and a sound outlet hole 17 connected to the receiving cavity. Among them, the metal sheet 30 is connected to the shell 10 and covers the through hole 13. The sound-emitting unit 20 is located in the receiving cavity and is specifically fixed to the inner wall of the shell 10. One side of the sound-emitting unit 20 and the inner wall of the shell 10 and the metal sheet 30 covering the through hole 13 are enclosed together to form a front cavity 18, and the other side surfaces are enclosed with the inner wall of the shell 10 to form a rear cavity 19, and the front cavity 18 and the rear cavity 19 are not connected to each other. Among them, the front cavity 18 is used for sound generation, and specifically transmits the sound to the outside of the speaker module 100 through the sound outlet hole 17 connected thereto, and the rear cavity 19 is used to improve the low-frequency acoustic performance. Furthermore, since the thickness of the metal sheet 30 can be much smaller than the thickness of the shell 10 at the same strength, the metal sheet 30 , the shell 10 , and the sound unit 20 together enclose the front cavity 18 , which can increase the volume of the front cavity 18 , thereby improving the sound quality.

[0045] The connecting glue 40 is connected at least to the side edges of the shell 10 and the metal sheet 30 near the sound outlet 17 , thereby increasing the connection strength between the metal sheet 30 and the shell 10 near the sound outlet 17 and reducing the resonance of the sound unit 20 , thereby ensuring the high-frequency performance of the speaker module 100 .

[0046] Of course, in some embodiments, the housing 10 only includes a front cover, which is formed with an open receiving cavity and a through hole 13 and a sound outlet 17 connected to the open receiving cavity; the sound-emitting unit 20 is connected to the open portion of the open receiving cavity, and is enclosed together with the front cover and the metal sheet 30 to form a front cavity 18. When the speaker module 100 is installed in an electronic device, the speaker module 100 and the internal structure of the electronic device are enclosed together to form a rear cavity.

[0047] The speaker module 100 provided by the utility model is provided with a shell 10 and a sound-emitting unit 20 which is accommodated in the shell 10 and can be enclosed with the shell 10 to form a front cavity 18. In this way, the vibration sound waves of the sound-emitting unit 20 can be transmitted to the outside of the speaker module 100 by using the sound outlet hole 17 connected to the front cavity 18, thereby realizing the sound-emitting function of the speaker module 100. At the same time, since the front cavity 18 is surrounded by the metal sheet 30, the sound-emitting unit 20 and the shell 10, and the thickness of the metal sheet 30 is less than the thickness of the corresponding area of ​​the shell 10, the volume of the front cavity 18 can be increased by using the thinning thickness of the metal sheet relative to the shell, thereby improving the sound quality. In addition, since the connecting edge of the shell 10 and the metal sheet 30 near the sound outlet hole 17 is provided with a connecting glue 40, the connection strength between the metal sheet 30 near the sound outlet hole 17 and the shell 10 can be improved, and the resonance of the sound-emitting unit 20 can be reduced, thereby ensuring the high-frequency performance of the speaker module 100. Based on the above configuration, the phenomenon of the high frequency performance curve of the speaker module 100 being discounted can be effectively improved, thereby ensuring the stability of the performance of the speaker module 100 .

[0048] In one embodiment, a connection adhesive 40 is provided along the circumferential ring of the through hole 13 at the connection between the housing 10 and the metal sheet 30. This can further enhance the connection strength between the metal sheet 30 and the housing 10, improve the constraint of the housing 10 on the metal sheet 30, reduce resonance, and thus ensure the stability of the performance of the speaker module 100.

[0049] In one embodiment, the connecting glue 40 is in an integral ring shape or in a split and spaced arrangement, which can enrich the shape of the connecting glue and is beneficial for controlling the acoustic quality of the speaker module.

[0050] In one embodiment, the cross-section of the connecting adhesive 40 is triangular or fan-shaped.

[0051] Specifically, the connecting glue 40 is formed by solidifying liquid glue to form a strip or ring structure with a triangular or fan-shaped cross-section, and the two adjacent side surfaces of the connecting glue 40 are respectively connected to the inner side surface of the metal sheet 30 and the inner wall of the through hole 13 of the shell 10, so as to strengthen the integrity of the metal sheet 30 and the shell 10, thereby improving the connection strength of the metal sheet 30.

[0052] In one embodiment, the shell 10 includes an upper shell 11 and a lower shell 12 assembled with the upper shell 11 to form a receiving cavity, the sound unit 20, the metal sheet 30 and the upper shell 11 surround the front cavity 18, the sound outlet hole 17 is formed on the side of the upper shell 11, and the through hole 13 is formed on the side of the upper shell 11 away from the lower shell 12.

[0053] The metal sheet 30 is placed in a mold for injection molding of the upper shell 11 , so that the metal sheet 30 and the shell 10 can be integrally molded by injection molding to ensure the connection strength between the two.

[0054] Specifically, the upper shell 11 is formed as an open box structure, and the lower shell 12 can cover the open part of the upper shell 11 to form a receiving cavity for fixing the sound unit 20 with the upper shell 11. The sound outlet 17 is formed on the side of the upper shell 11 and communicates with the receiving cavity through the sound outlet channel, and the through hole 13 is provided in the upper shell 11. In this way, the sound unit 20 fixed to the upper shell 11 can be enclosed together with the upper shell 11 and the metal sheet 30 covering the through hole 13 to form a front cavity 18, and the front cavity 18 is communicated with the sound outlet 17.

[0055] The lower shell 12 is formed with a pouring hole 15 for pouring the sound absorbing material and a cover plate 16 arranged corresponding to the pouring hole 15 .

[0056] In one embodiment, the upper shell 11 is formed with a boss 14, and the sound-emitting unit 20 is mounted on the boss 14. Specifically, the sound-emitting unit 20 can be fixed to the boss 14 by bonding, thereby being fixed to the upper shell 11.

[0057] In one embodiment, the thickness of the metal sheet 30 is 0.1 mm to 0.2 mm. The specific thickness can be adjusted according to the acoustic performance requirements of the speaker module 100. For example, the thickness of the metal sheet 30 can be 0.1 mm, 0.15 mm, 0.18 mm, 0.2 mm, etc.

[0058] In one embodiment, the connecting glue 40 is located on the side of the metal sheet 30 facing the receiving cavity, which will not affect the external dimensions; alternatively, the connecting glue 40 may also be located on the side of the metal sheet 30 away from the receiving cavity for easy operation; alternatively, the connecting glue 40 is provided on both sides of the metal sheet 30, so that the connection strength between the metal sheet 30 and the shell 10 is further improved.

[0059] In one embodiment, the metal sheet 30 is made of 301H, 301, 304 steel or magnesium-aluminum alloy. The specific material can be adjusted according to the acoustic performance requirements of the speaker module 100.

[0060] In one embodiment, at least part of the outer edge of the metal sheet 30 is formed with a warp portion 31, and the warp portion 31 is embedded in the housing 10. This can further improve the connection strength between the metal sheet 30 and the housing 10, thereby reducing resonance and ensuring the acoustic effect of the speaker module 100.

[0061] In one embodiment, the metal sheet 30 and the housing 10 are integrally formed by injection molding, which has a mature process and low cost.

[0062] The second aspect of the utility model further provides an electronic device, which includes the speaker module 100 described in any one of the above. The structure of the speaker module 100 refers to the above embodiment. Since the electronic device in this embodiment has the above speaker module 100, it must also have the beneficial effects of the above speaker module 100, which will not be repeated here one by one.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A speaker module, characterized in that: include: A shell body, wherein the shell body is formed with a receiving cavity and a through hole and a sound outlet hole communicated with the receiving cavity; A metal sheet, the metal sheet covers the through hole and the periphery of the metal sheet is embedded in the housing; A sound-generating unit, the sound-generating unit is contained in the containing cavity, the sound-generating unit, the metal sheet, and the shell together enclose a front cavity, and the front cavity is connected to the sound outlet; Connecting glue is provided at the connecting edge between the shell and the metal sheet adjacent to the sound outlet.

2. The speaker module according to claim 1, characterized in that: The connection glue is arranged along the circumference of the through hole at the connection between the shell and the metal sheet.

3. The speaker module according to claim 2, characterized in that: The connecting glue is in an integral ring shape or in separate and spaced arrangements.

4. The speaker module according to any one of claims 1 to 3, characterized in that: The cross section of the connecting adhesive is triangular or fan-shaped.

5. The speaker module according to claim 1, characterized in that: The shell includes an upper shell and a lower shell assembled with the upper shell to form the accommodating cavity. The sound-emitting unit, the upper shell and the metal sheet form the front cavity. The sound outlet is formed on the side of the upper shell, and the through hole is formed on a side of the upper shell away from the lower shell.

6. The speaker module according to claim 1, characterized in that: The thickness of the metal sheet is 0.1 mm to 0.2 mm.

7. The speaker module according to claim 1, characterized in that: The metal sheet is made of 301H, 301, 304 steel or magnesium-aluminum alloy.

8. The speaker module according to claim 1, characterized in that: At least part of the outer edge of the metal sheet is formed with a warping portion, and the warping portion is embedded in the housing; and / or The metal sheet and the housing are integrally formed by injection molding.

9. The speaker module according to claim 1, characterized in that: The connecting glue is located on a side of the metal sheet facing the receiving cavity; and / or The connecting glue is located on a side of the metal sheet away from the receiving cavity.

10. An electronic device, characterized in that: A speaker module comprising any one of claims 1-9.

Images