阅读说明：本技术 组合传感器和电子设备 (Combined sensor and electronic device ) 是由 闫文明 方华斌 于 2021-07-19 设计创作，主要内容包括：本发明公开一种组合传感器和电子设备。其中,组合传感器包括封装壳体、气压传感器、声学传感器以及防护板组件和防水透气膜。所述封装壳体形成有容纳腔,所述封装壳体设有连通所述容纳腔与外界环境的开口；所述气压传感器和所述声学传感器安装于所述容纳腔内；所述防水透气膜贴设于所述防护板组件,并与所述防护板组件封盖在所述开口处,所述防护板组件开设有过孔,所述过孔被配置为允许外界环境的声音和气流进入所述容纳腔内。本发明技术方案的组合传感器可以提高整体的防水设计的可靠性。(The invention discloses a combined sensor and an electronic device. The combined sensor comprises an encapsulation shell, an air pressure sensor, an acoustic sensor, a protection plate assembly and a waterproof breathable film. The packaging shell is provided with an accommodating cavity, and an opening for communicating the accommodating cavity with the external environment is formed in the packaging shell; the air pressure sensor and the acoustic sensor are arranged in the accommodating cavity; the waterproof breathable film is attached to the protection plate assembly and covered with the protection plate assembly, a through hole is formed in the protection plate assembly, and the through hole is configured to allow sound and air flow of the external environment to enter the accommodating cavity. The combined sensor of the technical scheme of the invention can improve the reliability of the integral waterproof design.)

1. A combination sensor, comprising:

the packaging shell is provided with an accommodating cavity, and an opening for communicating the accommodating cavity with the external environment is formed in the packaging shell;

the air pressure sensor and the acoustic sensor are mounted in the accommodating cavity; and

protection plate subassembly and waterproof ventilated membrane, waterproof ventilated membrane subsides are located protection plate subassembly, and with protection plate subassembly closing cap is in the opening part, the via hole has been seted up to the protection plate subassembly, the via hole is configured to allow external environment's sound and air current to enter hold the intracavity.

2. The combination sensor of claim 1, wherein the protection plate assembly comprises a first protection plate and a second protection plate which are arranged oppositely up and down, the first protection plate and the second protection plate are both provided with the through hole, the second protection plate is connected to the packaging shell, and the waterproof breathable film is arranged between the first protection plate and the second protection plate.

3. The combination sensor of claim 2, wherein the vias on the first guard plate are disposed in correspondence with the vias on the second guard plate.

4. The combination sensor according to claim 2, wherein the waterproof breathable film is connected to the first protection plate and the second protection plate through adhesive layers, respectively, and a gap is formed between the waterproof breathable film and the first protection plate and the second protection plate.

5. The combination sensor of claim 1, further comprising a sealing ring, wherein the side wall of the package housing is provided with a groove, and a portion of the sealing ring is embedded in the groove and another portion of the sealing ring is exposed out of the groove to sealingly mount the package housing.

6. The combination sensor according to any one of claims 1 to 5, wherein the package housing comprises a cover and a bottom shell, the cover defines the opening, the cover is connected to the bottom shell and encloses a first cavity, a second cavity is formed in the bottom shell, a sound passing hole is formed in the bottom shell, the first cavity is communicated with the second cavity through the sound passing hole and forms the accommodating cavity, the air pressure sensor is installed in the first cavity, and the acoustic sensor is installed in the second cavity.

7. The combination sensor of claim 6, wherein the air pressure sensor comprises a MEMS air pressure chip and a first ASIC chip, the MEMS air pressure chip overlying the first ASIC chip;

and/or the acoustic sensor comprises an MEMS microphone chip and a second ASIC chip, the MEMS microphone chip and the sound passing hole are correspondingly arranged, and the second ASIC chip and the MEMS microphone chip are arranged at intervals.

8. The combination sensor of claim 6, wherein said opening is provided at a top of said housing, and said air pressure sensor is provided at a bottom of said housing;

and/or the housing is made of metal;

and/or the bottom shell is made of ceramic.

9. The combination sensor of claim 6, wherein the bottom housing comprises a substrate and a cover, the cover is connected to the substrate and encloses the substrate to form the second cavity, the cover is connected to the cover and encloses the first cavity, and the sound passing hole is opened in the cover.

10. An electronic device characterized by comprising a combination sensor according to any one of claims 1 to 9.

Technical Field

The present invention relates to the field of sensor technologies, and in particular, to a combination sensor and an electronic device using the combination sensor.

Background

Some intelligent electronic devices in the related art (such as mobile phones, wearable watches, etc.) integrate acoustic sensors and barometric pressure sensors in the same package to form a combined sensor, so as to perform voice recognition and altitude measurement. In order to guarantee that external sound signals and air pressure signals can be effectively acquired, the packaging opening hole is usually required to be communicated with the external environment, but the overall waterproof performance of the combined sensor is often reduced by the aid of the design, and the reliability of the waterproof design is not good enough.

Disclosure of Invention

The main object of the present invention is to provide a combi sensor, which aims to improve the reliability of the overall waterproof design.

In order to achieve the above object, the present invention provides a combination sensor, including:

the packaging shell is provided with an accommodating cavity, and an opening for communicating the accommodating cavity with the external environment is formed in the packaging shell;

the air pressure sensor and the acoustic sensor are mounted in the accommodating cavity; and

protection plate subassembly and waterproof ventilated membrane, waterproof ventilated membrane subsides are located protection plate subassembly, and with protection plate subassembly closing cap is in the opening part, the via hole has been seted up to the protection plate subassembly, the via hole is configured to allow external environment's sound and air current to enter hold the intracavity.

Optionally, the guard plate subassembly includes relative first guard plate and the second guard plate that sets up from top to bottom, first guard plate with the second guard plate has all been seted up the via hole, the second guard plate connect in the encapsulation casing, waterproof ventilated membrane sets up first guard plate with between the second guard plate.

Optionally, the through holes in the first protection plate correspond to the through holes in the second protection plate.

Optionally, the waterproof breathable film is connected to the first protection plate and the second protection plate through adhesive layers, and a gap is formed between the waterproof breathable film and the first protection plate and between the waterproof breathable film and the second protection plate.

Optionally, the combination sensor further comprises a sealing ring, a groove is formed in the side wall of the packaging shell, part of the sealing ring is embedded into the groove, and the other part of the sealing ring is exposed out of the groove so as to be mounted on the packaging shell in a sealing mode.

Optionally, the package housing includes a cover and a bottom shell, the cover is provided with the opening, the cover is connected with the bottom shell and encloses to form a first cavity, a second cavity is formed in the bottom shell, the bottom shell is provided with a sound passing hole, the first cavity is communicated with the second cavity through the sound passing hole and forms the accommodating cavity, the air pressure sensor is installed in the first cavity, and the acoustic sensor is installed in the second cavity.

Optionally, the air pressure sensor comprises a MEMS air pressure chip and a first ASIC chip, the MEMS air pressure chip being stacked above the first ASIC chip;

and/or the acoustic sensor comprises an MEMS microphone chip and a second ASIC chip, the MEMS microphone chip and the sound passing hole are correspondingly arranged, and the second ASIC chip and the MEMS microphone chip are arranged at intervals.

Optionally, the opening is opened at the top of the housing, and the air pressure sensor is arranged at the bottom of the housing;

and/or the housing is made of metal;

and/or the bottom shell is made of ceramic.

Optionally, the bottom case includes a substrate and a cover, the cover is connected to the substrate and encloses the substrate to form the second cavity, the cover is connected to the cover and encloses the cover to form the first cavity, and the sound passing hole is opened in the cover.

The invention also proposes an electronic device comprising a combi-sensor as defined in any one of the above.

According to the combined sensor in the technical scheme, the air pressure sensor and the acoustic sensor with different functions are simultaneously arranged in the same packaging shell, so that the integrated design is realized, and the overall miniaturization design of the combined sensor is facilitated. And through the waterproof ventilated membrane of opening part closing cap at the encapsulation casing for external sound and air current can see through waterproof ventilative and be acquireed by acoustic sensor and baroceptor, and liquid then can be blockked by waterproof ventilated membrane, prevent to enter into and hold the intracavity, so set up under the open-ended circumstances at the encapsulation casing still can ensure to have good waterproof performance, guarantee waterproof reliability.

In addition, this application scheme still has the protection plate subassembly at the opening part closing cap, makes waterproof ventilated membrane subsides locate the common sealed opening of protection plate subassembly, sets up the via hole at the protection plate subassembly simultaneously for external environment's sound and air current can get into through the via hole, and the protection plate subassembly then forms the support and the protection to waterproof ventilated membrane, and the effectual damage that causes in assembly or use that has prevented guarantees the integrality of waterproof ventilated membrane, has further promoted the reliability of combination sensor waterproof design.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of one embodiment of a combinational sensor in accordance with the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic top view of the unitized sensor of the present invention with the guard plate assembly and the waterproof vented membrane removed;

FIG. 4 is a bottom view of the combinational sensor of the present invention with the substrate removed.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a combinational sensor 100.

Referring to fig. 1 to 4, in the embodiment of the present invention, the combination sensor 100 includes a package housing 10, an air pressure sensor 20, an acoustic sensor 30, a fender assembly 40 and a waterproof and breathable film 50. The package housing 10 is formed with an accommodating cavity 10a, and the package housing 10 is provided with an opening 111 for communicating the accommodating cavity 10a with the external environment; the air pressure sensor 20 and the acoustic sensor 30 are installed in the accommodating cavity 10 a; the waterproof breathable film 50 is attached to the protection plate assembly 40 and covers the opening 111 with the protection plate assembly 40, and the protection plate assembly 40 is provided with a through hole 40a, wherein the through hole 40a is configured to allow sound and air flow of the external environment to enter the accommodating cavity 10 a.

Specifically, the material of the package housing 10 may be metal, ceramic, etc. so as to utilize the electromagnetic shielding effect to prevent the external environment from forming electromagnetic interference on the combination sensor 100. The opening 111 may be a circular opening or a square opening opened in the package housing 10, and may be opened at one side of the package housing 10 to form the opening 111.

The acoustic sensor 30 is a microphone that can pick up a sound signal of an external environment and convert the sound signal into an electric signal. The barometric sensor 20 is used to obtain the atmospheric pressure of the external environment, so as to calculate the altitude of the current location according to the current atmospheric pressure value. Thus, the combined sensor 100 is formed for application, and can be used for both speech recognition applications and altitude measurement.

The waterproof breathable membrane 50 can allow sound and air flow to pass through, but can prevent water molecules from passing through, and the waterproof breathable membrane 50 is a net-shaped membrane, which is generally composed of a PE high-molecular breathable membrane and a PP spun-bonded non-woven fabric. The spun-bonded non-woven fabric mainly has the functions of enhancing tension and hydrostatic pressure and protecting the middle breathable film, and the middle breathable film is mainly used for real ventilation. Protection plate assembly 40 then can adopt the metal material preparation, and via hole 40a can be the micropore that sets up on protection plate assembly 40, and its quantity can be a plurality ofly to make protection plate assembly 40 form the micropore board structure, when making protection plate assembly 40 can strengthen and protect waterproof ventilated membrane 50, still possess dustproof effect.

Therefore, in the combined sensor 100 according to the present invention, the air pressure sensor 20 and the acoustic sensor 30 having different functions are simultaneously mounted in the same package housing 10, so that an integrated design is achieved, which is beneficial to the miniaturization design of the whole combined sensor 100. And through closing the waterproof ventilated membrane 50 at the opening 111 of the packaging shell 10, make external sound and air current can be permeated through waterproof ventilative and be obtained by acoustic sensor 30 and baroceptor 20, liquid then can be blockked by waterproof ventilated membrane 50, prevent to enter into and hold the chamber 10a, so can still ensure to have good waterproof performance under the condition that the packaging shell 10 sets up opening 111.

In addition, this application scheme still has protection plate subassembly 40 at opening 111 department closing cap, make waterproof ventilated membrane 50 paste locate protection plate subassembly 40 and seal opening 111 jointly, offer via hole 40a simultaneously at protection plate subassembly 40, make external environment's sound and air current can get into through via hole 40a, protection plate subassembly 40 then forms the support and the protection to waterproof ventilated membrane 50, the effectual damage that causes in assembly or use of having prevented, guarantee waterproof ventilated membrane 50's integrality, the reliability of the waterproof design of combined sensor 100 has further been promoted.

Referring to fig. 1, further, a flange 113 is formed at the periphery of the opening 111 of the enclosure 10 by bending outward, and the fender assembly 40 and the waterproof breathable membrane 50 are supported on the flange 113. So through setting up turn-ups 113, can increase the opening 111 edge to fender subassembly 40 and waterproof ventilated membrane 50's support area, also increased the sealed area at opening 111 edge simultaneously, not only improved the stability of fender subassembly 40 and waterproof ventilated membrane 50 installation like this, further promoted the peripheral leakproofness of opening 111 moreover.

Referring to fig. 2 in combination, in an embodiment of the present application, the protection plate assembly 40 includes a first protection plate 41 and a second protection plate 42 which are disposed opposite to each other from top to bottom, the via hole 40a is formed in both the first protection plate 41 and the second protection plate 42, the second protection plate 42 is connected to the package housing 10, and the waterproof breathable film 50 is disposed between the first protection plate 41 and the second protection plate 42.

In this embodiment, the second protection plate 42 may be fixed to the flange 113 by an adhesive, and the waterproof breathable film 50 is disposed between the first protection plate 41 and the second protection plate 42, so that both sides of the waterproof breathable film 50 can be protected and supported, and the waterproof breathable film is not easily damaged due to external stimulation during installation or use, thereby further improving the reliability of waterproof design. The through holes 40a on the first protection plate 41 and the second protection plate 42 ensure that the sound and air flow of the external environment can normally enter the accommodating cavity 10a through the waterproof breathable film 50.

Further, in the present application, the through hole 40a on the first protection plate 41 corresponds to the through hole 40a on the second protection plate 42. It can be understood that, when the number of the through holes 40a on the first protection plate 41 and the second protection plate 42 is multiple, the through holes 40a on the first protection plate 41 and the through holes 40a on the second protection plate 42 may form a one-to-one correspondence relationship, so that the sound and the air flow of the external environment may directly pass through the protection plate assembly 40 and the waterproof breathable film 50, thereby being more beneficial for the acoustic sensor 30 and the air pressure sensor 20 to obtain signals.

In an embodiment of the present application, the waterproof breathable film 50 is connected to the first protection plate 41 and the second protection plate 42 through an adhesive layer 60, and a gap is formed between the waterproof breathable film 50 and the first protection plate 41 and the second protection plate 42.

Wherein, the adhesive layer 60 can be an adhesive layer, two sides of the waterproof and breathable film 50 are respectively fixed with the first protection plate 41 and the second protection plate 42 by gluing, and the adhesive layer 60 should be arranged at the edge position in order not to influence the passing of sound and air flow. And gaps are formed between the waterproof breathable film 50 and the first protection plate 41 and the second protection plate 42, so that air flow and sound can cross flow through the through holes 40a on the first protection plate 41 and the second protection plate 42, and signals can be acquired by the acoustic sensor 30 and the air pressure sensor 20.

Further, the combination sensor 100 further includes a sealing ring 70, a groove 112 is formed in a side wall of the package housing 10, a portion of the sealing ring 70 is embedded in the groove 112, and another portion of the sealing ring is exposed out of the groove 112, so as to sealingly mount the package housing 10.

The groove 112 is an annular groove circumferentially surrounding along the sidewall of the package housing 10, and the sealing ring 70 is an O-ring made of rubber, silicone or silicon rubber. The sealing ring is sleeved and clamped in the groove 112, so that in the process of mounting the combination sensor 100, for example, when the combination sensor 100 is mounted on an electronic device, the sealing ring 70 can seal the gap between the package housing 10 and the electronic device, thereby ensuring the waterproof performance of the whole combination sensor 100 after mounting.

With reference to fig. 1 and fig. 3, in an embodiment of the present application, the package housing 10 includes a cover 11 and a bottom shell 12, the opening 111 is opened in the cover 11, the cover 11 is connected to the bottom shell 12 and encloses to form a first cavity 11a, a second cavity 12a is formed in the bottom shell 12, a sound passing hole 1221 is opened in the bottom shell 12, the first cavity 11a is communicated with the second cavity 12a through the sound passing hole 1221 and forms the accommodating cavity 10a, the air pressure sensor 20 is installed in the first cavity 11a, and the acoustic sensor 30 is installed in the second cavity 12 a.

Specifically, the cover 11 may be a cylinder with two open ends, one end of the cover is formed with the opening 111, the other end of the cover is in sealing butt joint with the top wall of the bottom case 12, the bottom case 12 is arranged in a square structure, and the cover 11 and the bottom case 12 may be fixed by bonding or welding. The material of the cover 11 and the material of the bottom case 12 may be the same or different. The sound passing holes 1221 may be in the shape of a circle, a square, or the like, and the number thereof may be one or more, which is not particularly limited in this application.

In practical application, after sound and airflow signals of the external environment enter the first cavity 11a through the opening 111, the airflow signals can be acquired by the air pressure sensor 20, so as to calculate the altitude according to the air pressure value; the sound signal passes through the sound hole 1221 and enters the second cavity 12a, and is acquired by the acoustic sensor 30 to realize a corresponding voice function. Thus, by arranging the air pressure sensor 20 and the acoustic sensor 30 in two separated cavities, the phenomenon of signal crosstalk during signal acquisition is effectively avoided.

Further, based on the above embodiment, considering the wiring of the package housing 10, the material of the casing 11 and the material of the bottom case 12 are different, the material of the casing 11 is metal, and the material of the bottom case 12 is ceramic. In this way, the case 11 made of metal can perform electromagnetic shielding, and the bottom case 12 made of ceramic can be formed with fine holes inside, so that the signal lines 80 can be arranged in the wall of the bottom case 12 to facilitate the extraction of the signals of the acoustic sensor 30 and the air pressure sensor 20.

Further, in an embodiment of the present application, the opening 111 is opened at the top of the housing 11, and the air pressure sensor 20 is disposed at the bottom of the housing 11; the acoustic sensor 30 may be mounted on the top of the bottom case 12 and disposed corresponding to the sound through hole 1221.

So set up, can make the sound and the air current that external environment got into directly lead to the bottom from the housing 11 top after, acquire the air current signal by the atmospheric pressure sensing, and the sound signal is then directly received by acoustic sensor 30 after passing through sound hole 1221, makes atmospheric pressure sensor 20 and acoustic sensor 30 more accurate, quick acquisition current atmospheric pressure signal and sound signal discern like this.

With combined reference to fig. 3 and 4, in the embodiment of the combined sensor 100 of the present application, the air pressure sensor 20 includes a MEMS air pressure chip 21 and a first ASIC chip 22, and the MEMS air pressure chip 21 is stacked on top of the first ASIC chip 22. The MEMS pressure chip 21 is configured to sense a change of a pressure parameter of an external environment, and the first ASIC chip 22 is configured to process a signal output by the MEMS pressure chip 21, so that the pressure sensor 20 has a function of detecting a pressure change of the external environment. By stacking the first ASIC chip 22 and the MEMS air pressure chip 21 on top of the bottom case 12, the mounting space of the chips can be further saved, which is beneficial to reducing the overall size and realizing the micro-design of the combined sensor 100.

The acoustic sensor 30 includes a MEMS microphone chip 31 and a second ASIC chip 32, the second ASIC chip 32 is spaced apart from the MEMS microphone chip 31 and disposed in the second cavity 12a, and the MEMS microphone chip 31 is disposed corresponding to the sound passing hole 1221. The MEMS microphone chip 31 is generally made of a material such as single crystal silicon, polysilicon, or silicon nitride, and is used for sensing and detecting a sound source, and converting a sound signal into an electrical signal for transmission, and the second ASIC chip 32 is used for processing a signal output by the MEMS microphone chip 31 and providing a voltage for the MEMS microphone chip 31, so that the acoustic sensor 30 can pick up sound. The second ASIC chip 32 and the MEMS microphone chip 31 may be disposed on the top wall of the bottom case 12 at a distance, and mounted upside down, so that the sound signal transmitted from the sound through hole 1221 can be quickly acquired by the MEMS microphone chip 31.

In an embodiment of the present application, the bottom case 12 includes a substrate 121 and a cover 122, the cover 122 is connected to the substrate 121 and encloses to form the second cavity 12a, the cover 11 is connected to the cover 122 and encloses to form the first cavity 11a, and the sound through hole 1221 is opened in the cover 122. The substrate 121 may be a circuit board or a ceramic board made of the same material as the cover 122, and the substrate 121 and the cover 122 may be fixed by bonding or welding, so that the signal line 80 disposed in the cover 122 may be led out from between the cover 122 and the substrate 121 and then led out from the substrate 121, thereby making the overall package structure simpler and convenient to assemble.

The present invention further provides an electronic device, which includes the combination sensor 100, and the specific structure of the combination sensor 100 refers to the above embodiments, and since the electronic device adopts all technical solutions of all the above embodiments, the electronic device at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. The electronic device may be a wearable electronic device, such as a wearable watch or a bracelet, or may be a mobile terminal, such as a mobile phone or a notebook computer, which is not limited herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.