Waterproof microphone and electronic device

Abstract

This invention provides a waterproof microphone and electronic device. The waterproof microphone includes a first substrate, a sound hole disposed on the first substrate, and a waterproof component disposed on the outside of the first substrate. The waterproof component includes a supporting base, a rigid sheet disposed on the supporting base, and a waterproof membrane located on the side of the rigid sheet closer to the first substrate. The supporting base is disposed on the first substrate such that the rigid sheet and the waterproof membrane cover the area where the sound hole is located. This invention improves the waterproof performance of the waterproof microphone.

Description

Technical Field

[0001] This utility model relates to the field of waterproof microphone technology, and more specifically, to a waterproof microphone and electronic device. Background Technology

[0002] As the size of electronic products such as mobile phones and laptops continues to shrink, people's performance requirements for these portable electronic products are also increasing. This, in turn, demands that the size of the supporting electronic components continue to shrink, while their performance and consistency continue to improve. Waterproof microphones integrated using MEMS (Micro Electro Mechanical System) technology are beginning to be used in a variety of electronic products in large quantities. Their package size is smaller than that of traditional waterproof microphones, and therefore they are gaining popularity.

[0003] Currently, waterproof microphones are generally waterproofed by directly attaching a single waterproof membrane to the microphone's cavity, or by cutting a groove on the outside of the microphone and attaching the membrane inside the groove. However, these methods not only offer limited waterproofing performance and require the microphone to have a sufficiently large size, but also result in less space remaining for the membrane, making assembly more difficult for customers. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a waterproof microphone and electronic device to solve the problems of existing waterproof microphones having limited waterproof performance, high requirements for microphone size and space, and affecting user assembly and application.

[0005] The waterproof microphone provided by this utility model includes a first substrate, a sound hole disposed on the first substrate, and a waterproof component disposed on the outside of the first substrate; wherein,

[0006] The waterproof component includes a support base, a rigid sheet disposed on the support base, and a waterproof membrane located on the side of the rigid sheet closer to the first substrate;

[0007] The supporting substrate is disposed on the first substrate so that the rigid sheet and the waterproof membrane cover the area where the acoustic hole is located.

[0008] In addition, an optional structural feature is that the rigid sheet is provided with regularly distributed vent holes, the shape of which includes circles and regular polygons.

[0009] In addition, an optional structural feature is that the first substrate, the supporting base, and the rigid sheet together form a receiving cavity, and the waterproof membrane is limited and fixed within the receiving cavity.

[0010] Furthermore, an optional structural feature is that a first membrane support is provided on the side of the rigid sheet near the first substrate, and the waterproof membrane is attached to the first membrane support; and,

[0011] The waterproof membrane and the rigid sheet are spaced apart and distributed in parallel.

[0012] In addition, an optional structural feature is that the height of the first membrane support is less than the height of the supporting substrate, and the size of the waterproof membrane is less than the size of the rigid sheet.

[0013] In addition, an optional structural feature is that the edge of the waterproof membrane is fixed to the inner wall of the supporting substrate, and the size of the waterproof membrane is the same as the overhang size of the rigid sheet.

[0014] In addition, an optional structural feature is that a second membrane support is provided on the side of the first substrate near the rigid sheet, and the waterproof membrane is attached to the second membrane support.

[0015] In addition, an optional structural feature is that the rigid sheet includes a steel sheet, a ceramic sheet, and a silicon sheet.

[0016] In addition, an optional structural feature is that it further includes a vertical substrate and a second substrate that form a packaging structure with the first substrate; wherein,

[0017] The first substrate and the second substrate are parallel to each other, and the vertical substrate is perpendicular to the first substrate and the second substrate;

[0018] Furthermore, solder pads are provided on the second substrate.

[0019] On the other hand, this utility model also provides an electronic device, including the aforementioned waterproof microphone.

[0020] Using the aforementioned waterproof microphone and electronic device, a waterproof component covering the area where the sound hole is located is provided on the outside of the first substrate. The waterproof component includes a supporting base, a rigid sheet, and a waterproof membrane. The rigid sheet and the waterproof membrane cover the area where the sound hole is located. The rigid sheet is used to prevent liquid from being sprayed, while the waterproof membrane is used for static waterproofing. The combination of the two with the supporting base can not only achieve dynamic and static waterproofing effects for the microphone, but also simplify the assembly and application of the entire waterproof component and improve the overall performance of the microphone.

[0021] To achieve the foregoing and related objectives, one or more aspects of the present invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the present invention. However, these aspects indicate only a few of the various ways in which the principles of the present invention can be used. Furthermore, the present invention is intended to include all such aspects and their equivalents. Attached Figure Description

[0022] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a waterproof microphone according to Embodiment 1 of this utility model;

[0024] Figure 2 This is a schematic diagram of the waterproof component structure according to Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the vent structure of the waterproof microphone according to Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of a waterproof microphone according to Embodiment 2 of this utility model;

[0027] Figure 5 This is a schematic diagram of the waterproof component structure according to Embodiment 2 of this utility model;

[0028] Figure 6 This is a schematic diagram of the vent structure of a waterproof microphone according to Embodiment 2 of this utility model.

[0029] The markings in the attached figures include: first substrate 11, second substrate 12, vertical substrate 13, MEMS chip 2, ASIC chip 3, acoustic hole 4, supporting substrate 5, first membrane support 6, waterproof membrane 7, rigid sheet 8, and vent hole 81.

[0030] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the following terms, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", and "circumferential", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the content or structure of this utility model.

[0033] To address the limitations of existing waterproofing methods, such as limited performance, high space requirements, and limitations on user assembly and application, this invention provides a waterproof microphone. A waterproof component covering the area of ​​the sound hole is disposed on one side of a first substrate. This component includes a supporting base, a rigid sheet, and a waterproof membrane. The rigid sheet blocks jets of water, while the waterproof membrane provides static waterproofing. The combination of the rigid sheet, waterproof membrane, and supporting base not only achieves both dynamic and static waterproofing for the microphone but also simplifies the assembly and application of the entire waterproof component, improving the overall performance of the microphone.

[0034] To describe in detail the structure of the waterproof microphone and electronic device of this utility model, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Figures 1 to 3 The schematic structure of the waterproof microphone according to Embodiment 1 of this utility model is shown from different angles.

[0036] like Figures 1 to 3 As shown, the waterproof microphone of Embodiment 1 of this utility model includes a first substrate 11, a sound hole 4 disposed on the first substrate 11, and a waterproof component disposed on the outside of the first substrate 11. The waterproof component further includes a supporting base 5, a rigid sheet 8 disposed on the supporting base 5, and a waterproof membrane 7 located on the side of the rigid sheet 8 near the first substrate 11. One side of the supporting base 5 is fixed to the first substrate 11, and the rigid sheet 8 is disposed on the other side, so that the entire waterproof component, including the rigid sheet and the waterproof membrane, covers the area where the sound hole 4 is located. Through the cooperation of the rigid sheet 8 and the waterproof membrane 7, dynamic and static waterproofing of the microphone is achieved.

[0037] The rigid sheet 8 can be fixed to the support base 5 by various methods such as pasting or embedding. At the same time, regular micro-holes are set on the rigid sheet 8 as vent holes 81. The shape of the vent holes 81 can be a regular polygon such as a circle, ellipse, square, or rhombus. The rigid sheet 8 and the vent holes 81 can dynamically waterproof the microphone from the spray of water outside without affecting the transmission of sound signals.

[0038] In addition, the rigid sheet 8 can be made of various structures such as steel sheet, ceramic sheet or silicon sheet. The rigid sheet 8 can not only act as the first barrier to block the external water jet and achieve dynamic waterproofing, but also protect the internal waterproof membrane 7, preventing the impact of external liquid from damaging the waterproof membrane 7, or even causing the internal chip of the microphone to fail.

[0039] After the waterproof components are assembled on the first substrate 11, the first substrate 11, the support base 5 and the rigid sheet 8 can together form a receiving cavity. The waterproof membrane 7 is limited and fixed in the receiving cavity. As long as the waterproof membrane 7 is located in the receiving cavity and the sound hole 4 is covered and waterproofed, the waterproof membrane can be fixed on the rigid sheet, fixed on the substrate or fixed on the support base, etc.

[0040] Specifically, in Embodiment 1 of this utility model, a first membrane support 6 is provided on the side (upper side) of the rigid sheet 8 near the first substrate 11. The waterproof membrane 7 is attached to the first membrane support 6, or the waterproof membrane 7 is pre-fixed to the first membrane support 6 by various methods such as adhesive. The overall structure of the waterproof membrane 7 is then assembled to one side of the rigid sheet 8, so that the waterproof membrane 7 and the rigid sheet 8 are spaced apart and distributed in parallel. Similarly, the overall structure of the waterproof membrane 7 can also be pre-assembled with the rigid sheet 8 and the supporting base 5 to form an independent waterproof component. Then, the waterproof component is attached to the side of the microphone with the sound hole 4 by HF glue or epoxy glue to achieve dynamic and static waterproof effects of the microphone. The assembly is convenient and can ensure the waterproof consistency of microphones produced in batches.

[0041] It should be noted that, in order to prevent the rigid sheet 8 and the waterproof membrane 7 from colliding and interfering with each other when subjected to external forces, such as liquids or gases, the height of the first membrane support 6 can be set to be less than the height of the supporting base 5. Furthermore, the size of the waterproof membrane 7 is slightly smaller than the size of the rigid sheet 8, and the waterproof membrane 7 completely covers the vent 81. The two form two waterproof barriers with different performances, so that the microphone can meet the intrusion requirements of jet-like water flow as well as static retention intrusion, making the waterproof performance more comprehensive, the microphone more reliable, and without affecting the size and space of the main body.

[0042] Figure 4 and Figure 5 The schematic structure of the waterproof microphone according to Embodiment 2 of this utility model is shown from different angles.

[0043] like Figure 4 and Figure 5 As shown in the figure, the waterproof microphone of the second embodiment of the present invention includes a first substrate 11, a sound hole 4 disposed on the first substrate 11, and a waterproof component disposed on the outside of the first substrate 11; wherein, the waterproof component further includes a supporting base 5, a rigid sheet 8 disposed on the supporting base 5, and a waterproof membrane 7 located on the side of the rigid sheet 8 near the first substrate 11. One side of the supporting base 5 is fixed to the first substrate 11, and the rigid sheet 8 is disposed on the other side, so that the entire waterproof component covers the area where the sound hole 4 is located. Through the cooperation of the rigid sheet 8 and the waterproof membrane 7, dynamic and static waterproofing of the microphone is achieved.

[0044] The difference between this second embodiment and the first embodiment is that the edge of the waterproof membrane 7 is directly fixed to the inner wall of the supporting base 5, and the suspended size of the waterproof membrane 7 is the same as that of the rigid sheet 8. In this second embodiment, the waterproof membrane 7 can be directly fixed to the inner wall of the supporting base 5 by injection molding or embedding. That is, the waterproof membrane 7 and the rigid sheet 8 are respectively set at different positions of the supporting base 5, so that they can be spaced apart and parallelly distributed. During the assembly process, the waterproof component as a whole can be directly pasted to various holes that require waterproofing, such as the sound hole 4 of the electronic product, thereby further simplifying the structure and assembly of the waterproof component.

[0045] In another embodiment three of this utility model, a second membrane support (not shown in the figure) can be provided on the side of the first substrate near the rigid sheet. The waterproof membrane is attached to the second membrane support, and then the support base and the rigid sheet are assembled to the outside of the waterproof membrane to form the outermost waterproof barrier. In this embodiment, the waterproof membrane and the second membrane support form an integral structure and are directly attached to the first substrate so that the waterproof membrane covers the entire acoustic hole area. Then the support base and the rigid sheet structure can be assembled.

[0046] In the above embodiments, the waterproof microphone may further include a vertical substrate 13, a second substrate 12, a MEMS chip 2, and an ASIC chip 3 forming an encapsulation structure with the first substrate; wherein the first substrate 11 and the second substrate 12 are parallel to each other, the vertical substrate 13 is perpendicular to the first substrate 11 and the second substrate 12, the MEMS chip 2 may be disposed at the sound hole 4 of the first substrate 11, and the ASIC chip 3 may be disposed on the first substrate 11, the second substrate 12, or the vertical substrate 13, as long as the MEMS chip 2 and the ASIC chip 3 are connected and conductive.

[0047] In addition, pads can be set on the second substrate 12 or the side substrate. With the microphone structure of the three-layer board, it is possible to set the waterproof membrane 7 sets without affecting the size and space of the microphone body, and without affecting the customer's assembly operation.

[0048] Corresponding to the aforementioned waterproof microphone, this utility model also provides an electronic device, including the aforementioned waterproof microphone. The embodiments of the electronic device can be referred to the description in the waterproof microphone embodiments, and the various embodiments of the waterproof microphone can also be mutually referenced; therefore, they will not be described in detail here.

[0049] Based on the aforementioned waterproof microphone and electronic device, a waterproof component covering the area of ​​the microphone's sound hole is provided. The rigid sheet in the waterproof component is used to prevent water jets, while the waterproof membrane is used to statically maintain waterproofness. The two components are combined with the supporting base to achieve both dynamic and static waterproofing effects for the microphone. This also simplifies the assembly and application of the entire waterproof component, providing greater flexibility, more comprehensive waterproofing performance, and without affecting the size and space of the microphone body, making it easy to assemble and use.

[0050] The waterproof microphone and electronic device according to the present invention have been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the waterproof microphone and electronic device proposed in the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A waterproof microphone, characterized in that, It includes a first substrate, an acoustic aperture disposed on the first substrate, and a waterproof component disposed on the outside of the first substrate; wherein, The waterproof component includes a support base, a rigid sheet disposed on the support base, and a waterproof membrane located on the side of the rigid sheet closer to the first substrate; The supporting substrate is disposed on the first substrate so that the rigid sheet and the waterproof membrane cover the area where the acoustic hole is located.

2. The waterproof microphone according to claim 1, characterized in that, The rigid sheet has regularly distributed air holes, the shapes of which include circles and regular polygons.

3. The waterproof microphone according to claim 1, characterized in that, The first substrate, the supporting base, and the rigid sheet together form a receiving cavity, and the waterproof membrane is fixed and limited within the receiving cavity.

4. The waterproof microphone according to claim 1, characterized in that, A first membrane support is provided on the side of the rigid sheet near the first substrate, and the waterproof membrane is attached to the first membrane support; and, The waterproof membrane and the rigid sheet are spaced apart and distributed in parallel.

5. The waterproof microphone according to claim 4, characterized in that, The height of the first membrane support is less than the height of the supporting substrate, and the size of the waterproof membrane is less than the size of the rigid sheet.

6. The waterproof microphone according to claim 1, characterized in that, The edge of the waterproof membrane is fixed to the inner wall of the supporting base, and the size of the waterproof membrane is the same as the overhang size of the rigid sheet.

7. The waterproof microphone according to claim 1, characterized in that, A second membrane support is provided on the side of the first substrate near the rigid sheet, and the waterproof membrane is attached to the second membrane support.

8. The waterproof microphone according to claim 1, characterized in that, The rigid sheet includes a steel sheet, a ceramic sheet, and a silicon sheet.

9. The waterproof microphone according to claim 1, characterized in that, It also includes a vertical substrate and a second substrate that form a packaging structure with the first substrate; wherein, The first substrate and the second substrate are parallel to each other, and the vertical substrate is perpendicular to the first substrate and the second substrate; Furthermore, solder pads are provided on the second substrate.

10. An electronic device, characterized in that, Includes the waterproof microphone as described in any one of claims 1 to 9.

Images