Sensor

Abstract

The present invention discloses a sensor, which includes an external encapsulation structure, an inner wall, a barometric pressure sensor module, a waterproof and breathable structure, and a microphone module; an installation cavity is formed inside the external encapsulation structure, and a sound hole is provided on one cavity wall of the installation cavity; the inner wall is arranged inside the installation cavity to divide the installation cavity into a first chamber and a second chamber, the inner wall is provided with an inner wall hole, and a waterproof and sound-permeable membrane is covered at the inner wall hole; the barometric pressure sensor module is arranged in the first chamber; the waterproof and breathable structure is arranged in the first chamber for isolating the sound hole and the barometric pressure sensor module; the microphone module is arranged in the second chamber to divide the second chamber into a front chamber and a rear chamber, and the sound hole communicates with the front chamber through the inner wall hole. The technical solution of the present invention provides a waterproof sensor to reduce the assembly space required for the whole machine.

Description

Technical Field

[0001] The present invention relates to the field of microelectromechanical technology, and particularly to a sensor. Background Art

[0002] Microphones and pressure sensors have become standard components in smart hardware such as mobile phones and bracelets. To reduce the assembly space on the client side and the number of air ducts, the development of a microphone and pressure combined sensor (hereinafter referred to as "M-P combined sensor") has become a market trend.

[0003] As is well known, to meet the high-quality requirements of customers, the waterproof function has gradually become an indicator that various electronic products must meet. The M-P combined sensor is an open-hole sensor. To prevent water from entering the sensor and affecting its normal operation, the current solution is to perform a waterproof design on the structure of the electronic product. For example, a waterproof sound-permeable membrane is provided on the whole machine housing of the electronic product, that is, a waterproof sound-permeable membrane is provided outside the sensor to make the sensor in a waterproof state. However, the waterproof design from the structure will increase the assembly space required for the whole machine. Summary of the Invention

[0004] The main object of the present invention is to propose a sensor, aiming to provide a waterproof sensor to reduce the assembly space required for the whole machine.

[0005] To achieve the above object, a sensor proposed by the present invention includes:

[0006] An external encapsulation structure, an installation cavity is formed inside the external encapsulation structure, and a sound hole is opened on one cavity wall of the installation cavity;

[0007] An inner wall, the inner wall is arranged in the installation cavity to divide the installation cavity into a first chamber and a second chamber, the inner wall is provided with an inner wall hole, and a waterproof sound-permeable membrane is covered at the inner wall hole;

[0008] An air pressure sensor module, the air pressure sensor module is arranged in the first chamber;

[0009] A waterproof and breathable structure, the waterproof and breathable structure is arranged in the first chamber for isolating the sound hole and the air pressure sensor module;

[0010] A microphone module, the microphone module is arranged in the second chamber to divide the second chamber into a front chamber and a rear chamber, and the sound hole communicates with the front chamber through the inner wall hole.

[0011] In an embodiment of the present invention, the inner wall further divides the installation cavity to form a third chamber, and the inner wall hole communicates with the front chamber through the third chamber.

[0012] In an embodiment of the present invention, the second chamber and the third chamber are respectively arranged on opposite sides of the first chamber.

[0013] In an embodiment of the present invention, an acoustic transmission channel is further formed in the external encapsulation structure, and the third chamber is communicated with the front chamber through the acoustic transmission channel.

[0014] In an embodiment of the present invention, the acoustic transmission channel and the sound hole are respectively arranged on opposite sides of the first chamber, and the acoustic transmission channel and the second chamber are respectively arranged on adjacent sides of the first chamber.

[0015] In an embodiment of the present invention, the inner wall hole is opened on a side of the inner wall facing away from the second chamber.

[0016] In an embodiment of the present invention, the waterproof acoustic transmission membrane is covered on a side of the inner wall hole facing the third chamber.

[0017] In an embodiment of the present invention, the waterproof and breathable structure includes a waterproof and breathable adhesive, and the waterproof and breathable adhesive covers the pressure sensor module.

[0018] In an embodiment of the present invention, the inner wall hole is located between the waterproof and breathable structure and the sound hole.

[0019] In an embodiment of the present invention, the external encapsulation structure includes:

[0020] A substrate;

[0021] A housing, the housing covers the substrate and encloses the installation cavity with the substrate.

[0022] In the sensor proposed by the present invention, an inner wall is arranged in the installation cavity of the external encapsulation structure to divide the installation cavity into a first chamber and a second chamber through the inner wall. An inner wall hole is opened on the inner wall, and a waterproof acoustic transmission membrane is covered at the inner wall hole; thus, during the assembly process, the pressure sensor module is installed in the first chamber, and then the waterproof and breathable structure is used to isolate the sound hole and the pressure sensor module, so that the pressure sensor module can sense the external air pressure signal through the sound hole, and at the same time, the waterproof and breathable structure can block the external moisture from acting on the pressure sensor module through the sound hole, playing a waterproof role for the pressure sensor module; in addition, the microphone module is installed in the second chamber to divide the second chamber into a front chamber and a rear chamber, so that the sound hole can be communicated with the front chamber through the inner wall hole, enabling the microphone module to sense the external sound signal through the sound hole, and since the waterproof acoustic transmission membrane is covered at the inner wall hole, the waterproof acoustic transmission membrane can block the moisture from entering the front chamber through the inner wall hole and acting on the microphone module, playing a waterproof role for the microphone module.

[0023] Therefore, the present invention provides a waterproof sensor, and the waterproof and breathable structure and the waterproof sound-permeable film that keep the sensor in a waterproof state are both arranged inside the sensor, replacing the waterproof design method on the structure of the electronic product, that is, replacing the method of arranging the waterproof sound-permeable film on the whole machine housing of the electronic product, so as to reduce the assembly space required for the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a cross-sectional view of an embodiment of the sensor of the present invention.

[0026] Description of the reference numerals in the drawings:

[0027] Label Name Label Name 100 Sensor 10c Acoustic transmission channel 10 External encapsulation structure 11 Substrate 10a Mounting cavity 12 Outer shell 10a1 First chamber 20 Inner wall 10a2 Second chamber 21 Inner wall hole 11a2 Front cavity 30 Waterproof acoustic membrane 12a2 Rear cavity 40 Barometric pressure sensor module 10a3 Third chamber 50 Waterproof and breathable structure 10b Sound hole 60 Microphone module

[0028] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides a sensor 100, aiming to provide a waterproof sensor 100 to reduce the assembly space required for the whole machine.

[0033] The following will describe the specific structure of the sensor 100 of the present invention:

[0034] Referring to Figure 1 , in an embodiment of the sensor 100 of the present invention, the sensor 100 includes an external encapsulation structure 10, an inner wall 20, a barometric pressure sensor module 40, a waterproof and breathable structure 50, and a microphone module 60; an installation cavity 10a is formed in the external encapsulation structure 10, and a sound hole 10b is opened on a cavity wall of the installation cavity 10a; the inner wall 20 is arranged in the installation cavity 10a to divide the installation cavity 10a into a first chamber 10a1 and a second chamber 10a2, an inner wall hole 21 is opened on the inner wall 20, and a waterproof and sound-permeable film 30 is covered at the inner wall hole 21; the barometric pressure sensor module 40 is arranged in the first chamber 10a1; the waterproof and breathable structure 50 is arranged in the first chamber 10a1 and is used for isolating the sound hole 10b and the barometric pressure sensor module 40; the microphone module 60 is arranged in the second chamber 10a2 to divide the second chamber 10a2 into a front chamber 11a2 and a rear chamber 12a2, and the sound hole 10b communicates with the front chamber 11a2 through the inner wall hole 21.

[0035] It can be understood that in the sensor 100 proposed by the present invention, an inner wall 20 is provided in the installation cavity 10a of the external encapsulation structure 10, so as to divide the installation cavity 10a into a first chamber 10a1 and a second chamber 10a2 by the inner wall 20. An inner wall hole 21 is opened on the inner wall 20, and a waterproof sound-permeable membrane 30 is covered at the inner wall hole 21. Thus, during the assembly process, the barometric pressure sensor module 40 is installed in the first chamber 10a1, and then the waterproof and breathable structure 50 is used to isolate the sound hole 10b and the barometric pressure sensor module 40. While the barometric pressure sensor module 40 can sense the external barometric pressure signal through the sound hole 10b, the waterproof and breathable structure 50 can also block the external moisture from acting on the barometric pressure sensor module 40 through the sound hole 10b, playing a waterproof role for the barometric pressure sensor module 40. In addition, the microphone module 60 is installed in the second chamber 10a2 to divide the second chamber 10a2 into a front chamber 11a2 and a rear chamber 12a2, so that the sound hole 10b can communicate with the front chamber 11a2 through the inner wall hole 21, enabling the microphone module 60 to sense the external sound signal through the sound hole 10b. And because the waterproof sound-permeable membrane 30 is covered at the inner wall hole 21, the moisture can be blocked from entering the front chamber 11a2 through the inner wall hole 21 and acting on the microphone module 60, playing a waterproof role for the microphone module 60.

[0036] Therefore, the present invention provides a waterproof sensor 100, and the waterproof and breathable structure 50 and the waterproof sound-permeable membrane 30 that keep the sensor 100 in a waterproof state are both arranged inside the sensor 100, replacing the waterproof design method on the structure of electronic products, that is, replacing the method of setting the waterproof sound-permeable membrane 30 on the whole machine housing of electronic products, thereby reducing the assembly space required for the whole machine.

[0037] It should be noted that the waterproof sound-permeable membrane 30 can at least include a PC (polycarbonate) plastic mesh and a nylon fiber mesh, which can enable sound to pass through quickly and achieve the effects of waterproofing and sound permeability.

[0038] In the actual application process, the waterproof and breathable structure 50 can be a waterproof and breathable glue or a waterproof and breathable membrane, as long as it can play a role in isolating the barometric pressure sensor module 40 and the sound hole 10b.

[0039] Exemplarily, the inner wall 20 can divide the installation cavity 10a into a first chamber 10a1 and a second chamber 10a2 distributed left and right, or can divide the installation cavity 10a into a first chamber 10a1 and a second chamber 10a2 distributed up and down.

[0040] Exemplarily, the first chamber 10a1 can be directly connected to the front chamber 11a2 of the second chamber 10a2 through the inner wall hole 21, or the first chamber 10a1 can be indirectly connected to the front chamber 11a2 of the second chamber 10a2 through the inner wall hole 21 and other chambers and / or channels. In one embodiment, the barometric pressure sensor module 40 can be installed on a chamber wall of the installation chamber 10a, and the microphone module 60 can be installed on an outer wall of the inner wall 20, with the microphone module 60 covering the inner wall hole 21 on the inner wall 20, so that the first chamber 10a1 can be directly connected to the front chamber 11a2 of the second chamber 10a2 through the inner wall hole 21. In another embodiment, the barometric pressure sensor module 40 and the microphone module 60 can also be spaced apart and installed on the same chamber wall of the installation chamber 10a, so that the first chamber 10a1 is indirectly connected to the front chamber 11a2 of the second chamber 10a2 through the inner wall hole 21 and other chambers and / or channels.

[0041] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the inner wall 20 further divides the installation chamber 10a to form a third chamber 10a3, and the inner wall hole 21 communicates with the front chamber 11a2 through the third chamber 10a3.

[0042] With such a setting, after the inner wall 20 is installed in the installation chamber 10a, the installation chamber 10a can be divided into a first chamber 10a1, a second chamber 10a2, and a third chamber 10a3 by the inner wall 20, so that the inner wall hole 21 can communicate with the front chamber 11a2 of the second chamber 10a2 through the third chamber 10a3, ensuring that when an external sound signal enters the first chamber 10a1 through the sound hole 10b, it can enter the third chamber 10a3 through the inner wall hole 21 and then enter the front chamber 11a2 of the second chamber 10a2 through the third chamber 10a3, thus ensuring the waterproof effect on the microphone module 60.

[0043] In the actual application process, the second chamber 10a2 and the third chamber 10a3 can be located on opposite sides of the first chamber 10a1, on adjacent sides of the first chamber 10a1, or on the same side of the first chamber 10a1.

[0044] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the second chamber 10a2 and the third chamber 10a3 are located on opposite sides of the first chamber 10a1.

[0045] With such an arrangement, the pressure sensor module 40 and the microphone module 60 can be spaced apart and installed on the same cavity wall of the installation cavity 10a, facilitating the installation of the pressure sensor module 40 and the microphone module 60. Additionally, by disposing the second chamber 10a2 and the third chamber 10a3 on opposite sides of the first chamber 10a1, the purpose of extending the sound propagation path can be achieved. Even if a small amount of moisture penetrates through the waterproof sound-permeable membrane 30, this part of the moisture can be retained in the third chamber 10a3 to further ensure the waterproof effect on the microphone module 60.

[0046] During actual application, the third chamber 10a3 can communicate with the front cavity 11a2 of the second chamber 10a2 through a channel inside the external encapsulation structure 10, or can communicate with the front cavity 11a2 of the second chamber 10a2 through an external pipeline.

[0047] Furthermore, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, a sound-permeable channel 10c is further formed inside the external encapsulation structure 10, and the third chamber 10a3 communicates with the front cavity 11a2 through the sound-permeable channel 10c. With such an arrangement, by directly forming the sound-permeable channel 10c that communicates the third chamber 10a3 and the front cavity 11a2 inside the external encapsulation structure 10, the internal structure of the sensor 100 can be simplified to achieve the purpose of simplifying the assembly process.

[0048] It should be noted that the first chamber 10a1, the third chamber 10a3, the sound-permeable channel 10c, and the front cavity 11a2 can form the front sound cavity of the microphone module 60, and the rear cavity 12a2 is the rear sound cavity of the microphone module 60.

[0049] Furthermore, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the sound-permeable channel 10c and the sound hole 10b are disposed on opposite sides of the first chamber 10a1, and the sound-permeable channel 10c and the second chamber 10a2 are disposed on adjacent sides of the first chamber 10a1. That is, when the sound hole 10b is disposed above the first chamber 10a1, the sound-permeable channel 10c will be disposed below the first chamber 10a1, and the third chamber 10a3 and the second chamber 10a2 can be disposed on the left and right sides of the first chamber 10a1 respectively. With such an arrangement, the microphone module 60 and the pressure sensor module 40 can be spaced apart and installed on the bottom cavity wall of the installation cavity 10a, facilitating the installation of the pressure sensor module 40 and the microphone module 60. Additionally, interference between the sound hole 10b and the sound-permeable channel 10c can be avoided.

[0050] Furthermore, with reference to Figure 1, in an embodiment of the sensor 100 of the present invention, the inner wall hole 21 is opened on the side of the inner wall 20 facing away from the second chamber 10a2. That is, the inner wall hole 21 is opened on the side of the inner wall 20 close to the third chamber 10a3. With such a setting, the sound signal can pass through the inner wall hole 21 and the waterproof sound-permeable membrane 30 and directly enter the third chamber 10a3, so as to simplify the internal structure design of the sensor 100.

[0051] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the waterproof sound-permeable membrane 30 is covered on the side of the inner wall hole 21 facing the third chamber 10a3.

[0052] With such a setting, during the assembly process, the waterproof sound-permeable membrane 30 can be first covered on the outside of the inner wall hole 21, and then the inner wall 20 covered with the waterproof sound-permeable membrane 30 is installed in the installation cavity 10a of the external encapsulation structure 10, so that the waterproof sound-permeable membrane 30 can be arranged on the side of the inner wall hole 21 facing the third chamber 10a3, which is convenient for the installation of the waterproof sound-permeable membrane 30.

[0053] Exemplarily, the waterproof sound-permeable membrane 30 can be connected to the inner wall 20 by an adhesive method.

[0054] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the waterproof and breathable structure 50 includes a waterproof and breathable adhesive, and the waterproof and breathable adhesive covers the barometric pressure sensor module 40.

[0055] With such a setting, during the assembly process, the waterproof and breathable adhesive can be filled in the first chamber 10a1 so that the waterproof and breathable adhesive covers the barometric pressure sensor module 40, thus achieving the purpose of isolating the sound hole 10b and the barometric pressure sensor 100. At the same time, the barometric pressure sensor module 40 can be pasted and fixed inside the external encapsulation structure 10 through the waterproof and breathable adhesive, so as to enhance the installation stability of the barometric pressure sensor module 40.

[0056] Of course, in other embodiments, when the waterproof and breathable structure 50 includes a waterproof and breathable membrane, the waterproof and breathable membrane can be attached to the surface of the barometric pressure sensor module 40.

[0057] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the inner wall hole 21 is located between the waterproof and breathable structure 50 and the sound hole 10b.

[0058] With such a setting, the waterproof and breathable structure 50 will not block the inner wall hole 21 on the inner wall 20, thereby avoiding the influence of the waterproof and breathable structure 50 on the propagation of the sound signal, so that the sound signal can smoothly pass through the inner wall hole 21 and the waterproof sound-permeable membrane 30.

[0059] Further, with reference to Figure 1 , in an embodiment of the sensor 100 of the present invention, the external encapsulation structure 10 includes a substrate 11 and a housing 12. The housing 12 covers the substrate 11 and encloses the installation cavity 10a with the substrate 11. With such a setting, during the assembly process, the waterproof sound-permeable membrane 30 can be first mounted on the inner wall 20, then the air pressure sensor module 40 can be mounted on the substrate 11, and then the inner wall 20 can be mounted on the substrate 11 to enclose the air pressure sensor module 40 through the inner wall 20. Then, the waterproof and breathable structure 50 can be installed in the first cavity 10a1 enclosed by the inner wall 20, and then the microphone module 60 can be mounted on the substrate 11. Finally, the housing 12 can be mounted on the substrate 11, which is convenient for the installation of the internal structure of the sensor 100.

[0060] In an embodiment, the sensor 100 proposed by the present invention can be specifically prepared by the following process:

[0061] First, mount the waterproof sound-permeable membrane 30 on the outer side wall of the left side of the inner wall 20 so that the waterproof sound-permeable membrane 30 covers the inner wall holes 21 on the inner wall 20;

[0062] Second, mount the air pressure sensor module 40 on the substrate 11;

[0063] Third, mount the inner wall 20 on the substrate 11 and enclose the air pressure sensor module 40;

[0064] Fourth, fill the waterproof and breathable glue in the first cavity 10a1 enclosed by the inner wall 20;

[0065] Fifth, mount the microphone module 60 on the substrate 11;

[0066] Sixth, mount the housing 12 on the substrate 11 so that the inner wall 20 divides the installation cavity 10a formed by enclosing the substrate 11 and the housing 12 into a first cavity 10a1, a second cavity 10a2, and a third cavity 10a3; at the same time, ensure that the housing 12 and the inner wall 20 are firmly bonded and airtight to prevent the first cavity 10a1 and the second cavity 10a2 from being connected (if the first cavity 10a1 and the second cavity 10a2 are connected, it will cause the front sound cavity and the rear sound cavity of the microphone to be connected, thus causing the performance of the microphone module 60 to fail), and it can also prevent the first cavity 10a1 and the third cavity 10a3 from being connected at places other than the inner wall holes 21 (if the first cavity 10a1 and the third cavity 10a3 are connected at places other than the inner wall holes 21, it will cause external moisture to enter the third cavity 10a3 and the air-permeable channel through these connected places, and then act on the microphone module 60, resulting in the failure of the microphone module 60).

[0067] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A sensor, characterized in that, Comprising: An external encapsulation structure, an installation cavity is formed inside the external encapsulation structure, and a sound hole is opened on one cavity wall of the installation cavity; An inner wall, the inner wall is arranged inside the installation cavity to divide the installation cavity into a first chamber and a second chamber, the inner wall is provided with an inner wall hole, and a waterproof sound-permeable membrane is covered at the inner wall hole; An air pressure sensor module, the air pressure sensor module is arranged inside the first chamber; A waterproof and breathable structure, the waterproof and breathable structure is arranged inside the first chamber for isolating the sound hole and the air pressure sensor module; A microphone module, the microphone module is arranged inside the second chamber to divide the second chamber into a front chamber and a rear chamber, and the sound hole communicates with the front chamber through the inner wall hole; The inner wall also divides the installation cavity to form a third chamber, and the inner wall hole communicates with the front chamber through the third chamber; The second chamber and the third chamber are respectively arranged on opposite sides of the first chamber; A sound-permeable channel is also formed inside the external encapsulation structure, and the third chamber communicates with the front chamber through the sound-permeable channel; or, the third chamber communicates with the front chamber through an external pipeline.

2. The sensor according to claim 1, wherein The sound-permeable channel and the sound hole are respectively arranged on opposite sides of the first chamber, and the sound-permeable channel and the second chamber are respectively arranged on adjacent sides of the first chamber.

3. The sensor according to claim 1, wherein The inner wall hole is opened on the side of the inner wall facing away from the second chamber.

4. The sensor according to claim 3, wherein The waterproof sound-permeable membrane is covered on the side of the inner wall hole facing the third chamber.

5. The sensor according to any one of claims 1 to 4, characterized in that, The waterproof and breathable structure includes a waterproof and breathable glue, and the waterproof and breathable glue covers the air pressure sensor module.

6. The sensor according to any one of claims 1 to 4, characterized in that, The inner wall hole is located between the waterproof and breathable structure and the sound hole.

7. The sensor according to any one of claims 1 to 4, characterized in that, The external encapsulation structure includes: A substrate; A housing, the housing covers the substrate and encloses the installation cavity with the substrate.

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