Waterproof structure and digital loudspeaker

Abstract

The utility model discloses a waterproof structure and a digital loudspeaker, and relates to the technical field of loudspeakers, and the waterproof structure comprises a protection layer which is attached to the outer wall, deviating from a sound production cavity, of a shell in the loudspeaker and covers a sound production hole in the shell; the sound transmission membrane assembly covers the sound outlet hole, the sound transmission membrane assembly is close to the sound production cavity relative to the protective layer, and the sound transmission membrane assembly comprises a waterproof sound transmission membrane and a supporting layer; the water absorption part comprises a first water absorption layer and a second water absorption layer which are both arranged in the sound production cavity, the first water absorption layer surrounds the edge of the sound production hole, and the second water absorption layer is located in the opening direction of the sound production hole and corresponds to the sound production hole. According to the waterproof structure provided by the utility model, water drops and moisture are blocked and absorbed layer by layer through the protection layer, the sound transmission membrane assembly and the water absorption part, so that the waterproof capability is improved, a relatively good dry environment can be kept in the sound production cavity, the aging of an electronic device accelerated by a humid environment is obviously slowed down, and the service life of a product is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a waterproof structure and a digital loudspeaker. Background Art

[0002] Speaker design must not only ensure clear and powerful sound, but also protect against moisture and humidity intrusion. This is because humid environments often accelerate the aging of electronic products, shortening their lifespan. Existing non-digital speaker products typically incorporate waterproof structures within the product, such as placing a filter between the speaker cavity and the exterior, or applying waterproof coating to the headphone jack. The speaker itself is not waterproof. Current digital speakers, based on functionality and ease of testing, have a sealed structure that effectively prevents dust, but its waterproofing is poor, making it susceptible to moisture intrusion and shortening the product's lifespan.

[0003] Therefore, how to improve the waterproof capability of digital speakers and extend the service life of the products is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0004] The purpose of the present invention is to provide a waterproof structure and a digital speaker. The waterproof structure provided by the present invention is used to improve the waterproof ability of the digital speaker and extend the service life of the product.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A waterproof structure comprising:

[0007] A protective layer is attached to the outer wall of the housing of the speaker facing away from the sound cavity, and the protective layer covers the sound outlet of the housing;

[0008] A sound-permeable membrane assembly, used for covering the sound outlet, the sound-permeable membrane assembly being closer to the sound-emitting cavity than the protective layer, and comprising a waterproof sound-permeable membrane and a supporting layer;

[0009] The water absorbing part includes a first water absorbing layer and a second water absorbing layer both arranged in the sound cavity, the first water absorbing layer surrounds the edge of the sound hole, and the second water absorbing layer is located in the opening direction of the sound hole and corresponds to the sound hole.

[0010] Optionally, in the above-mentioned waterproof structure, the sound-permeable membrane assembly includes a sound-permeable portion and a mounting portion, the sound-permeable portion covers the sound outlet hole, the sound-permeable portion is provided with a sound-permeable hole for sound wave transmission, and the sound-permeable membrane assembly is connected to the shell through the mounting portion.

[0011] Optionally, in the above waterproof structure, the mounting portion includes a first curved surface and a second curved surface located at the edge of the sound-transmitting portion, the first curved surface extending in a direction perpendicular to the sound-transmitting portion, and the second curved surface extending in an extension direction of the sound-transmitting portion, so that the first curved surface and the second curved surface form a stepped structure;

[0012] The housing is provided with a mounting groove, the first curved surface and the second curved surface are embedded in the mounting groove, the first curved surface is in contact with the side wall of the mounting groove, and the second curved surface is in contact with the bottom of the mounting groove.

[0013] Optionally, in the above waterproof structure, the mounting groove is located in the cavity of the sound-permeable hole, and the notch of the mounting groove faces the direction of the sound-emitting cavity.

[0014] Optionally, the above-mentioned waterproof structure further includes an isolation column arranged in the sound-emitting cavity, the isolation column including a first bearing section, a second bearing section and a supporting section, one end of the supporting section is connected to the substrate, the other end of the supporting section is connected to the first bearing section, the first bearing section extends along the extension direction of the substrate, and the first bearing corresponds to the sound hole, one end of the second bearing section is connected to the first bearing section, the other end of the second bearing section extends toward the sound hole, and the second bearing section is located at the edge of the sound hole, and the first bearing section and the second bearing section are both adhered to the second water-absorbing layer on one side facing the sound hole; the isolation column is an integral structure, or the first bearing section, the second bearing section and the supporting section are connected and fixed by bonding.

[0015] Optionally, in the above waterproof structure, the isolation column divides the sound cavity into a first cavity and a second cavity, the first cavity is connected to the sound outlet, the sound unit is located in the first cavity, and the control unit is located in the second cavity.

[0016] Optionally, in the above-mentioned waterproof structure, the shell is provided with a drainage cavity, the hole wall of the sound outlet is provided with a drainage hole, the drainage cavity is connected with the sound outlet through the drainage hole, and the drainage hole is located between the protective layer and the sound-transmitting membrane assembly.

[0017] Optionally, in the above-mentioned waterproof structure, the sound-permeable membrane assembly includes a sound-permeable membrane layer, an adhesive layer and a support layer, the sound-permeable membrane layer is connected to the support layer through the adhesive layer, and a gap is provided between the sound-permeable membrane layer and the support layer.

[0018] Optionally, in the above waterproof structure, the protective layer and the shell are an integral structure, and the protective layer is a porous mesh structure.

[0019] The present invention provides a waterproof structure in which a speaker is provided with a protective layer, a sound-permeable membrane assembly, and a water-absorbing portion. The protective layer is located on the outer wall of the speaker housing, and the sound-permeable membrane assembly is located closer to the sound-emitting cavity than the protective layer. The protective layer and the sound-permeable membrane assembly cover the sound-emitting hole, and the sound-permeable membrane assembly includes a waterproof sound-permeable membrane and a support layer. The first water-absorbing layer of the water-absorbing portion surrounds the edge of the sound-emitting hole, and the second water-absorbing layer located in the sound-emitting cavity is located in the direction of the opening of the sound-emitting hole and corresponds to the sound-emitting hole. Therefore, the protective layer and the sound-permeable membrane assembly not only provide dust protection but also prevent water droplets and water vapor from penetrating into the sound-emitting cavity through the sound-emitting hole. Even if a small amount of water droplets or water vapor penetrates the protective layer and the sound-permeable membrane assembly, the first and second water-absorbing layers located in the sound-emitting cavity can absorb the water droplets and water vapor. The waterproof structure provided by the utility model blocks and absorbs water droplets and moisture layer by layer through multiple structures including a protective layer, a sound-transmitting membrane assembly and a water-absorbing part, thereby improving the waterproof ability, maintaining a relatively dry environment in the sound-emitting cavity, significantly slowing down the aging of electronic components accelerated by a humid environment, and improving the service life of the product.

[0020] The utility model also provides a digital speaker, comprising the waterproof structure as described in any one of the above items.

[0021] The digital speaker provided by the present invention has all the technical effects of the above-mentioned waterproof structure due to its waterproof structure, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 This is a schematic structural diagram of the waterproof structure disclosed in an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of the sound-transmitting membrane assembly disclosed in an embodiment of the present utility model;

[0025] Figure 3 This is a schematic structural diagram of the sound-transmitting portion, the bonding layer, and the supporting layer disclosed in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of a waterproof structure disclosed in another embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the integrated structure of the protective layer and the shell disclosed in an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 100 is the housing, 110 is the sound cavity, 120 is the sound outlet, 130 is the installation slot, and 140 is the drainage channel;

[0030] 200 is the protective layer;

[0031] 300 is a sound-permeable membrane assembly, 310 is a sound-permeable portion, 320 is a mounting portion, 321 is a first curved surface, 322 is a second curved surface, 330 is a waterproof sound-permeable membrane, 340 is a bonding layer, and 350 is a supporting layer;

[0032] 400 is a water absorbing portion, 410 is a first water absorbing layer, and 420 is a second water absorbing layer;

[0033] 500 is an isolation column, 510 is a first bearing section, 520 is a second bearing section, and 530 is a supporting section;

[0034] 600 is the sound unit;

[0035] 700 is a control unit;

[0036] 800 is a substrate. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0040] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] The core of this utility model is to provide a waterproof structure for improving the waterproof ability of digital speakers and prolonging the service life of the product;

[0043] Another core of the present invention is to provide a digital speaker with the above-mentioned waterproof structure.

[0044] like Figure 1As shown, an embodiment of the present utility model discloses a waterproof structure, including a protective layer 200, a sound-permeable membrane assembly 300 and a water absorption part 400. Among them, the protective layer 200 is attached to the outer wall of the speaker shell 100 and covers the sound outlet 120 of the speaker. At the same time, the sound-permeable membrane assembly 300 used to cover the sound outlet 120 is close to the sound cavity 110 relative to the protective layer 200, and the sound-permeable membrane assembly 300 includes a waterproof sound-permeable membrane 330 with waterproof performance and a support layer 350. The waterproof sound-permeable membrane 330 can be made of a material with high water pressure resistance and a waterproof level of IP68 or higher, which can maintain waterproof performance in deep water of 30-50 meters. The support layer 350 can be made of a high molecular polymer material. When the waterproof sound-permeable membrane 330 is under pressure, the support layer 350 provides support for the waterproof sound-permeable membrane 330, so that the deformation of the waterproof sound-permeable membrane 330 is kept within the recoverable elastic deformation, avoiding damage to the structure of the waterproof sound-permeable membrane 330, and ensuring that the waterproof sound-permeable membrane 330 maintains good waterproof and sound-permeable performance. The first water absorption layer 410 and the second water absorption layer 420 of the water absorption part 400 are both located in the sound cavity 110. The first water absorption layer 410 is attached to the inner wall of the sound cavity 110 and surrounds the edge of the sound hole 120. The second water absorption layer 420 is located in the opening extension direction of the sound hole 120 and corresponds to the sound hole 120. The water absorption part 400 can use absorbent cotton to absorb water. The protective layer 200 and the sound-transmitting membrane assembly 300 separate the sound cavity 110 from the external environment, preventing dust, water droplets, and moisture from penetrating into the sound cavity 110 through the sound outlet hole 120. Even if a small amount of moisture penetrates the protective layer 200 and the sound-transmitting membrane assembly 300, the moisture penetrates along the wall of the sound outlet hole 120, or directly drips into the sound cavity 110 through the sound outlet hole 120, the first water-absorbing layer 410 adhered to the inner wall of the sound cavity 110 and surrounding the edge of the sound outlet hole 120, and the second water-absorbing layer 420 corresponding to the sound outlet hole 120 can absorb these small amounts of infiltrated moisture. Therefore, through the layer-by-layer arrangement of the protective layer 200, the sound-transmitting membrane assembly 300 and the water-absorbing part 400, the moisture is blocked and absorbed, ensuring that the sound cavity 110 can maintain a good degree of dryness, significantly alleviating the problem of accelerated aging of electronic components due to the intrusion of moisture and water into the sound cavity 110, and significantly improving the service life of the product.

[0045] In a specific embodiment, the sound-permeable membrane assembly 300 has a sound-permeable portion 310 and a mounting portion 320. The sound-permeable membrane assembly 300 is connected to the shell 100 through the mounting portion 320 to achieve the installation and fixation of the sound-permeable membrane assembly 300, and the sound-permeable portion 310 of the sound-permeable membrane assembly 300 covers the sound outlet 120. The waterproof sound-permeable membrane 330 and the supporting layer 350 in the sound-permeable portion 310 are both provided with sound-permeable holes for sound wave transmission. The sound-permeable holes opened in the supporting layer 350 can reduce the amount of sound loss when penetrating the supporting layer 350. In addition, without affecting the structural strength of the supporting layer 350, the diameter of the sound-permeable holes on the supporting layer 350 is set as large as possible to further reduce the sound resistance.

[0046] like Figure 2 As shown, the mounting portion 320 includes a first curved surface 321 and a second curved surface 322 located at the edge of the sound-transmitting portion 310, wherein one end of the first curved surface 321 is connected to the edge of the sound-transmitting portion 310, and the other end of the first curved surface 321 extends in a direction perpendicular to the sound-transmitting portion 310, and the second curved surface 322 is connected to the extended end of the first curved surface 321, and the second curved surface 322 extends along the extension direction of the sound-transmitting portion 310, so that the first curved surface 321 and the second curved surface 322 form a stepped structure. The housing 100 is provided with a mounting groove 130. The first curved surface 321 and the second curved surface 322 are inserted into the mounting groove 130. The first curved surface 321 abuts against the sidewalls of the mounting groove 130, and the second curved surface 322 abuts against the bottom of the mounting groove 130. This allows the first curved surface 321 and the second curved surface 322 to snap into the mounting groove 130. The cooperation between the first curved surface 321, the second curved surface 322, and the mounting groove 130 secures the acoustically transparent membrane assembly 300 to the housing 100 via the mounting portion 320. It is understood that to enhance the stability of the connection between the acoustically transparent membrane assembly 300 and the housing 100, glue may be applied to the mounting groove 130 before the first curved surface 321 and the second curved surface 322 are inserted into the mounting groove 130. The first curved surface 321 and the second curved surface 322 are then bonded and secured to the mounting groove 130.

[0047] In addition, in order to reduce the impact of the installation groove 130 on the space of the sound cavity 110 and ensure that the internal space of the sound cavity 110 has a high utilization rate, the installation groove 130 is arranged in the cavity of the sound-transmitting hole, and the groove of the installation groove 130 faces the sound cavity 110, and the groove bottom of the installation groove 130 extends away from the sound cavity 110. This not only avoids the installation groove 130 from extending toward the sound cavity 110 and occupying the internal space of the sound cavity 110, but also the groove of the installation groove 130 is away from the sound outlet hole 120, which prevents moisture from penetrating through the sound outlet hole 120 and gathering in the installation groove 130, and cannot be absorbed by the water absorption part 400, thereby ensuring that the water absorption part 400 can better play the role of absorbing moisture.

[0048] like Figure 1 As shown, the waterproof structure provided in this embodiment is further provided with an isolation column 500 , which is arranged in the sound cavity 110 . The isolation column 500 includes a first bearing section 510, a second bearing section 520 and a supporting section 530, wherein one end of the supporting section 530 is connected to the substrate 800, and the other end of the supporting section 530 extends in a direction perpendicular to the substrate 800 and is connected to the first bearing section 510, the first bearing section 510 extends along the extension direction of the substrate 800, and the extension surface of the first bearing section 510 corresponds to the sound hole 120, and one end of the second bearing section 520 is connected to the extension end of the first bearing section 510, the other end of the second bearing section 520 extends toward the sound hole 120, and the extension end of the second bearing section 520 is connected to the edge of the sound hole 120, and the second water-absorbing layer 420 for absorbing water and moisture is respectively adhered to the first bearing section 510 and the second bearing section 520 on a side facing the sound hole 120 and corresponding to the sound hole 120, so as to absorb water droplets directly dripping through the sound hole 120. In another specific embodiment, the spacer column 500, comprising the first load-bearing section 510, the second load-bearing section 520, and the support section 530, can be integrally formed through an injection molding process. This integral structure of the spacer column 500 not only facilitates processing and improves production efficiency, but also enhances overall structural strength, provides increased stability, and is less susceptible to damage, thereby extending its service life. Alternatively, the first load-bearing section 510, the second load-bearing section 520, and the support section 530 can be bonded together using glue, employing a segmented structure for greater production efficiency.

[0049] At the same time, the isolation column 500 divides the sound cavity 110 into a first cavity and a second cavity, forming two independent cavities, wherein the first cavity is connected to the sound hole 120, and the second cavity is isolated from the sound hole 120 by the isolation column 500. The sound unit 600 for generating sound is arranged in the first cavity. The sound unit 600 adopts a MEMS (Micro-Electro-Mechanical System) generating unit array and is electrically connected to the substrate 800 through mounting, bonding, etc. The control unit 700 with integrated circuit is arranged in the second cavity, thereby preventing water and moisture from directly penetrating into the second cavity and invading the integrated circuit to age the electrical components. The control unit 700 adopts an ASIC chip (Application Specific Integrated Circuit) and is also electrically connected to the substrate 800 through mounting, bonding, etc.

[0050] like Figure 4As shown, in another specific embodiment, the housing 100 of the speaker is provided with a drainage cavity 140, and a drainage hole is provided on the hole wall of the sound outlet hole 120, and the drainage hole is located between the protective layer 200 and the sound-transmitting membrane assembly 300. The drainage cavity 140 is connected with the sound outlet hole 120 through the drainage hole. Therefore, when external water droplets penetrate through the protective layer 200 and continue to penetrate into the sound cavity 110 along the hole wall of the sound outlet hole 120, the water will flow into the drainage cavity 140 through the drainage hole on the hole wall, thereby preventing water droplets from penetrating into the sound cavity 110.

[0051] like Figure 3 As shown, the waterproof sound-permeable membrane 330 of the sound-permeable membrane assembly 300 is connected to the support layer 350 through the adhesive layer 340, so that the waterproof sound-permeable membrane 330 and the support layer 350 are fixed. At the same time, a gap is provided between the waterproof sound-permeable membrane 330 and the support layer 350, and they are directly and tightly fitted to reduce the sound wave weakening impedance of the sound-permeable membrane assembly 300, ensure better penetration of the sound waves, and guarantee the pronunciation quality.

[0052] like Figure 5 As shown, the protective layer 200 has a porous mesh structure. The protective layer 200 and the housing 100 can be integrally formed through an injection molding process. This integrated design not only enhances structural strength but also helps improve production efficiency. The protective layer 200 can be made of a circular mesh structure made of a polymer material. Its rigidity must meet the requirements of at least not deforming or denting when pressed by human force or accidentally touched by a tool in a normal use environment. It also needs to have a certain toughness to prevent the outer layer from being shattered by external forces and debris from falling into the inner layer, affecting the chip's acoustic transparency. After the housing 100 is connected to the substrate 800 via sealant, to further enhance the sealing performance of the connection between the housing 100 and the substrate 800, a liquid silicone encapsulation process can be used to reseal the bonded area and improve waterproof performance.

[0053] The present invention also discloses a digital speaker including a waterproof structure. Since the digital speaker has the waterproof structure, it has all the technical effects of the waterproof structure, which will not be described in detail herein.

[0054] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A waterproof structure, characterized in that: include: A protective layer is attached to the outer wall of the housing of the speaker facing away from the sound cavity, and the protective layer covers the sound outlet of the housing; A sound-permeable membrane assembly, used for covering the sound outlet, the sound-permeable membrane assembly being closer to the sound-emitting cavity than the protective layer, and comprising a waterproof sound-permeable membrane and a supporting layer; The water absorbing part includes a first water absorbing layer and a second water absorbing layer both arranged in the sound cavity, the first water absorbing layer surrounds the edge of the sound hole, and the second water absorbing layer is located in the opening direction of the sound hole and corresponds to the sound hole.

2. The waterproof structure according to claim 1, characterized in that: The sound-permeable membrane assembly includes a sound-permeable portion and a mounting portion. The sound-permeable portion covers the sound outlet hole. The sound-permeable portion is provided with a sound-permeable hole for sound wave transmission, and the sound-permeable membrane assembly is connected to the shell through the mounting portion.

3. The waterproof structure according to claim 2, characterized in that: The mounting portion includes a first curved surface and a second curved surface located at the edge of the sound-transmitting portion, the first curved surface extending in a direction perpendicular to the sound-transmitting portion, and the second curved surface extending in the extension direction of the sound-transmitting portion, so that the first curved surface and the second curved surface form a stepped structure; The housing is provided with a mounting groove, the first curved surface and the second curved surface are embedded in the mounting groove, the first curved surface is in contact with the side wall of the mounting groove, and the second curved surface is in contact with the bottom of the mounting groove.

4. The waterproof structure according to claim 3, characterized in that: The mounting groove is located in the cavity of the sound-transmitting hole, and the notch of the mounting groove faces the direction of the sound-emitting cavity.

5. The waterproof structure according to claim 1, characterized in that: It also includes an isolation column arranged in the sound-emitting cavity, the isolation column including a first bearing section, a second bearing section and a supporting section, one end of the supporting section is connected to the substrate, the other end of the supporting section is connected to the first bearing section, the first bearing section extends along the extension direction of the substrate, and the first bearing corresponds to the sound hole, one end of the second bearing section is connected to the first bearing section, the other end of the second bearing section extends toward the sound hole, and the second bearing section is located at the edge of the sound hole, and the first bearing section and the second bearing section are both adhered to the second water-absorbing layer on one side facing the sound hole; the isolation column is an integral structure, or the first bearing section, the second bearing section and the supporting section are connected and fixed by bonding.

6. The waterproof structure according to claim 5, characterized in that: The isolation column divides the sound cavity into a first cavity and a second cavity. The first cavity is connected to the sound hole. The sound unit is located in the first cavity, and the control unit is located in the second cavity.

7. The waterproof structure according to claim 1, characterized in that: The shell is provided with a drainage cavity, and the hole wall of the sound outlet is provided with a drainage hole. The drainage cavity is connected with the sound outlet through the drainage hole, and the drainage hole is located between the protective layer and the sound-permeable membrane assembly.

8. The waterproof structure according to claim 1, characterized in that: The sound-permeable membrane assembly further includes an adhesive layer, the waterproof sound-permeable membrane is connected to the support layer via the adhesive layer, and a gap is provided between the waterproof sound-permeable membrane and the support layer.

9. The waterproof structure according to claim 1, characterized in that: The protective layer and the shell are an integrated structure, and the protective layer is a porous mesh structure.

10. A digital speaker, characterized in that: The waterproof structure comprises the waterproof structure according to any one of claims 1 to 9.

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