CN211930817U - Bone voiceprint sensors and electronics - Google Patents

Abstract

The utility model discloses a bone voiceprint sensor and electronic equipment. The bone voiceprint sensor includes: a vibration pickup unit, the vibration pickup unit includes a vibration pickup housing and an elastic membrane provided in the vibration pickup housing; and a sensor unit, the sensor unit includes a package housing, and a device. The sensor chip in the package shell, the package shell is provided with a sound hole and a vent hole, the vibration pickup shell is mounted on the package shell, and the sound hole communicates with the vibration pickup shell and the the package housing; the air vent hole is used to release pressure when the vibration pickup unit and the sensor unit are assembled. In this way, it is not necessary to open a hole on the vibration pickup shell, so that the vibration pickup area of the vibration pickup shell will not be reduced, which is beneficial to improve the performance of the bone voiceprint sensor.

Description

Bone voiceprint sensors and electronics

technical field

The utility model relates to the technical field of sensors, in particular to a bone voiceprint sensor and electronic equipment.

Background technique

The bone voiceprint sensor uses the slight vibration of the head and neck bones caused by people's speech to collect sound signals and convert them into electrical signals. Because it is different from traditional microphones that collect sound through air conduction, it can transmit sound with high definition in a very noisy environment. In many occasions, such as fire scenes, firefighters with anti-virus equipment cannot speak directly into the microphone with their mouths, so bone voiceprint sensors can be used at this time. With the development of electronic products, the application of bone voiceprint sensors is becoming more and more extensive.

In the related art, a bone voiceprint sensor usually includes a vibration pickup unit and a sensor unit. The vibration pickup unit is used to pick up the external bone vibration signal and transmit it to the sensor unit; the sensor unit is used to convert the vibration signal into an electrical signal.

The vibration pickup unit usually includes a vibration pickup housing and an elastic membrane disposed in the vibration pickup housing. In order to relieve pressure when the vibration pickup unit and the sensor unit are assembled, a vent hole is usually provided on the vibration pickup housing. However, the vent hole is provided on the vibration pickup housing, and the vent hole will affect the vibration pickup area of the vibration pickup housing, and also limit the size of the vent hole.

Utility model content

The main purpose of the present utility model is to propose a bone voiceprint sensor, which aims to solve the technical problem in the related art that the vent hole is arranged on the vibration pickup shell of the vibration pickup unit, thereby affecting the vibration pickup area of the vibration pickup shell. .

In order to achieve the above purpose, the present utility model proposes a bone voiceprint sensor, comprising:

a vibration pickup unit, the vibration pickup unit includes a vibration pickup housing and an elastic membrane disposed in the vibration pickup housing; and

A sensor unit, the sensor unit includes a package housing and a sensor chip arranged in the package housing, the package housing is provided with a sound hole and a vent hole, and the vibration pickup housing is mounted on the package housing , the sound hole communicates with the vibration pickup housing and the packaging housing; the air vent hole is used to release pressure when the vibration pickup unit and the sensor unit are assembled.

Optionally, the encapsulation housing includes a connection board, and the connection board is used for being mounted on a main control board of an electronic device, and the air vent is provided on the connection board.

Optionally, the package housing further includes a substrate, the substrate is arranged opposite to the connection plate, the acoustic hole and the sensor chip are arranged on the substrate; the vibration pickup housing is mounted on the substrate .

Optionally, the vent hole is disposed away from the sensor chip.

Optionally, the cross-sectional area of the vent hole is greater than or equal to 10 square micrometers.

Optionally, a plurality of the vent holes are distributed at intervals.

Optionally, the vibration pickup unit further includes a vibration adjustment member disposed on the elastic film, the vibration adjustment member includes an adjustment base connected with the elastic film, and an adjustment member disposed on the surface of the adjustment base A protruding part, the adjusting protruding part protrudes into the sound hole.

Optionally, the sensor chip is disposed corresponding to the sound hole, and the adjustment protrusion extends into the front cavity of the sensor chip.

Optionally, the vibration pickup unit further includes a vibration adjustment member disposed on the elastic film, the vibration adjustment member includes an adjustment body connected with the elastic film, and a side provided on the side of the adjustment body. the lateral protruding portion, an avoidance interval is formed between the lateral protruding portion and the elastic film; or,

The vibration pickup unit further includes a vibration adjustment member disposed on the elastic film, the vibration adjustment member includes an adjustment base connected with the elastic film, and an adjustment protrusion disposed on the surface of the adjustment base, The adjustment base includes an adjustment body connected with the elastic film, and a lateral protruding portion provided on the side surface of the adjustment main body, and an avoidance interval is formed between the lateral protruding portion and the elastic film ; The adjusting protrusion extends into the sound hole.

The utility model also provides an electronic device, comprising the above-mentioned bone voiceprint sensor.

Compared with arranging the vent hole on the vibration pickup shell, the bone voiceprint sensor of the present invention sets the vent hole on the package shell, so it is not necessary to open a hole on the vibration pickup shell, so that the vibration pickup shell is not reduced. Therefore, it is beneficial to improve the performance of the bone voiceprint sensor.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

1 is a schematic structural diagram of an embodiment of the bone voiceprint sensor of the present invention;

2 is a schematic structural diagram of another embodiment of the bone voiceprint sensor of the present invention;

3 is a schematic structural diagram of another embodiment of the bone voiceprint sensor of the present invention;

FIG. 4 is a schematic structural diagram of still another embodiment of the bone voiceprint sensor of the present invention.

Description of reference numbers:

label name label name 100 Bone voiceprint sensor twenty one Encapsulation shell 10 Vibration pickup unit 211 sound hole 11 Vibration pick-up housing 212 air vent 12 elastic membrane 213 substrate 121 first vent 214 connection board 13 Vibration adjuster 2141 electrical connection 131 Adjust the base 215 Hoarding 132 Adjust the protrusions twenty two sensor chip 133 Adjust the subject 221 anterior cavity 1331 first regulating part 222 Induction film 1332 second regulating part 223 second vent 134 Lateral projections twenty three electrical connector 20 sensor unit 70 ASIC chip

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as instructions Either imply their relative importance or imply the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

In addition, the meaning of "and/or" in the whole text is to include three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or scheme that A and B satisfy at the same time.

The utility model provides a bone voiceprint sensor and an electronic device. Among them, the bone voiceprint sensor is used in electronic equipment, which can be, but is not limited to, electronic equipment known to those skilled in the art, such as headsets, earphones, smart watches, smart bracelets, vehicle noise reduction equipment, and vibration sensing devices. equipment.

In an embodiment of the present invention, as shown in FIG. 1 , the bone voiceprint sensor 100 includes a vibration pickup unit 10 and a sensor unit 20. The vibration pickup unit 10 is connected to the sensor unit 20, that is, the vibration pickup unit 10 is combined with the sensor unit 20, and the vibration pickup unit 10 is used to pick up the bone vibration signal of the outside world (such as the wearer, or other vibration sources, which will be described below by taking the wearer as an example) to generate a response vibration signal, and to The responsive vibration signal is passed to the sensor unit 20 for converting the received vibration signal into an electrical signal. It can be understood that, without loss of generality, a closed vibration transmission air channel is formed between the vibration pickup unit 10 and the sensor unit 20 , so that the response vibration signal is transmitted to the sensor unit 20 through the closed vibration transmission air channel.

Further, as shown in FIG. 1 , the vibration pickup unit 10 includes a vibration pickup housing 11 and an elastic film 12 disposed in the vibration pickup housing 11 .

Specifically, the elastic membrane 12 is installed in the vibration pickup housing 11 , and the vibration pickup housing 11 can protect the elastic membrane 12 . The vibration pickup shell 11 can transmit the bone vibration of the wearer and the speaker to the elastic membrane 12, and the elastic membrane 12 is used to pick up the bone vibration of the wearer and the speaker to vibrate to form a response vibration signal; wherein, the elastic membrane 12 is in the When vibrating, the gas in the airtight vibration transmission air passage is driven to vibrate, so as to transmit the response vibration signal to the sensor unit 20 through the airtight vibration transmission air passage.

The elastic membrane 12 can be a membrane with elastic deformation ability, including but not limited to a plastic membrane, a paper membrane, a metal membrane, a biological membrane, and the like. Moreover, the elastic membrane 12 may adopt a single-layer structure, or may adopt a multi-layer composite membrane. The elastic membrane 12 can be made of a single material, or a composite of different materials. It will not be described in detail here.

Further, as shown in FIG. 1 , the vibration pickup unit 10 further includes a vibration adjustment member 13 disposed on the elastic membrane 12 .

In this way, the vibration adjusting member 13 is used to adjust the vibration of the elastic membrane 12 , so that the vibration of the elastic membrane 12 is better matched with the wearer's bone vibration signal, thereby improving the sensitivity of the bone voiceprint sensor 100 . Moreover, the vibration adjusting member 13 vibrates together with the elastic membrane 12 , which can increase the quality of the elastic membrane 12 when it vibrates, thereby effectively avoiding the interference of external factors (eg, sound waves).

Without loss of generality, as shown in FIG. 1 , the projection of the vibration adjusting member 13 on the elastic membrane 12 should be smaller than that of the elastic membrane 12 .

Optionally, the vibration adjusting member 13 may be adhered to the elastic membrane 12 by colloid.

Further, as shown in FIG. 1 , the sensor unit 20 includes a package housing 21 and a sensor chip 22 disposed in the package housing 21 , the vibration pickup housing 11 is mounted on the package housing 21 , and the package The housing 21 is provided with a sound hole 211 , and the sound hole 211 communicates with the sensor unit 20 and the vibration pickup unit 10 . Specifically, the sound hole 211 communicates with the packaging casing 21 and the vibration pickup casing 11 ; it can be understood that the sound hole 211 is used to form a closed vibration transmission air passage.

Specifically, the response vibration signal is transmitted into the package casing 21 through the sound hole 211, and is transmitted to the sensor chip 22, and the sensor chip 22 is used for converting the response vibration signal into an electrical signal.

Specifically, as shown in FIG. 1 , the elastic membrane 12 divides the space in the vibration pickup housing 11 into a first cavity and a second cavity, and the first cavity and the second cavity are respectively located in the elastic membrane 12 (in the state shown in FIG. 1 , the first cavity is located on the upper side of the elastic membrane 12 , and the second cavity is located on the lower side of the elastic membrane 12 ); wherein the second cavity and the acoustic hole 211 Connected.

Specifically, the vibration pickup casing 11 is a casing with one end open, the open end of the vibration pickup casing 11 is mounted on the packaging casing 21 , and the packaging casing 21 blocks the opening of the vibration pickup casing 11 . The packaging casing 21 communicates with the vibration pickup casing 11 through the sound hole 211 . In this way, the structure can be simplified.

Optionally, the open end of the vibration pickup housing 11 may be bonded to the packaging housing 21 by glue.

Optionally, the vibration adjusting member 13 may be disposed on any side of the elastic membrane 12; that is, the vibration adjusting member 13 may be disposed in either the first cavity or the second cavity.

In a specific embodiment, the packaging housing 21 and/or the vibration pickup housing 11 is provided with a vent hole 212 , and the vent hole 212 is used to relieve pressure when the vibration pickup unit 10 and the sensor unit 20 are assembled. Specifically, the vent hole 212 communicates with the external environment. In this way, by arranging the air vent 212, when the vibration pickup unit 10 and the sensor unit 20 are assembled, the failure of the vibration pickup unit 10 or the sensor chip 22 due to the air pressure difference between the inner and outer spaces of the package housing 21 or the vibration pickup housing 11 can be avoided. Therefore, the difficulty of assembling the bone voiceprint sensor 100 can be reduced.

However, when the bone voiceprint sensor 100 is applied, that is, when it is applied to an electronic device, the vent hole 212 needs to be blocked to prevent it from affecting the performance of the bone voiceprint sensor 100 . Optionally, the vent hole 212 may be blocked by sealing glue, or adhering a sealing tape, or adding a sealing plug.

It should be pointed out that, if the vent hole 212 is provided in the vibration pickup housing 11, optionally, the vent hole 212 is communicated with the first cavity, for example, the vent hole 212 is provided on the top of the vibration pickup housing 11; Optionally, the vent hole 212 is an annular hole.

In the embodiment given by the present invention, as shown in FIGS. 1-4 , the air vent hole 212 is provided on the package casing 21 .

It should be noted that, compared with disposing the air vent hole 212 on the vibration pick-up housing 11 , the air vent hole 212 is provided on the package housing 21 , and there is no need to open a hole in the vibration pick-up housing 11 , so as not to reduce the pick-up housing 11 . The vibration pickup area of the vibration housing 11 is improved, thereby helping to improve the performance of the bone voiceprint sensor 100 .

Further, as shown in FIG. 1 , the package housing 21 includes a connecting board 214 , the connecting board 214 is used for being mounted on the main control board of the electronic device, and the air vent 212 is provided on the connecting board 214 .

Specifically, the electronic device includes an electronic control board. When the bone voiceprint sensor 100 is applied to the electronic device, the bone voiceprint sensor 100 can be installed on the electronic control board. Specifically, the connection board 214 of the package housing 21 is mounted on the main control board, and optionally, the connection board 214 is mounted on the surface of the main control board.

In this way, by arranging the air vent hole 212 on the connecting board 214, when the bone voiceprint sensor 100 is installed (eg, mounted) on the main control board, the air vent hole 212 can be blocked by the original process of filling glue, so that the Simplifies the field application process, thereby reducing production costs.

Further, the cross-sectional area of the vent hole 212 is greater than or equal to 10 square micrometers.

It can be understood that since the air vent hole 212 is arranged on the package housing 21, it will not affect the vibration pickup area of the vibration pickup housing 11; at the same time, in order to improve the pressure relief effect, the size of the air vent hole 212 can be increased, and the air vent hole 212 The larger it is, the better it is for processing.

Optionally, the cross-sectional area of the vent hole 212 is greater than or equal to 40 square micrometers; even the cross-sectional area of the vent hole 212 can be greater than or equal to 100 square micrometers; even larger, such as 150, 200, 300 square micrometers, etc. Wait.

Further, there are multiple (that is, more than or equal to two) vent holes 212 distributed at intervals. It can be understood that since the air vent holes 212 are provided on the package casing 21 , the vibration pickup area of the vibration pickup housing 11 will not be affected; therefore, in order to improve the pressure relief effect, multiple air vent holes 212 may be provided. Of course, only one vent hole 212 may be provided.

Further, as shown in FIG. 1 , the vent hole 212 is disposed away from the sensor chip 22 . In this way, the influence of the air vent 212 on the sensor chip 22 can be avoided.

Further, as shown in FIG. 1 , the package housing 21 further includes a substrate 213, the substrate 213 is disposed opposite to the connecting plate 214, the acoustic hole 211 and the sensor chip 22 are disposed on the substrate 213; the vibration pickup shell The body 11 is mounted on the substrate 213 . In this way, when the bone voiceprint sensor 100 is installed on the main control board, it is convenient for the vibration pickup unit 10 to pick up the bone vibration signal. Of course, in other embodiments, the substrate 213 and the connecting plate 214 may also be disposed adjacent to each other.

Specifically, the package housing 21 further includes an enclosure plate 215 disposed on the periphery of the substrate 213 , the enclosure plate 215 forms an opening at one end away from the substrate 213 , and the connecting plate 214 is connected to the opening.

Further, as shown in FIG. 1 , the sensor chip 22 is disposed corresponding to the sound hole 211 . In detail, the front cavity 221 of the sensor chip 22 is disposed corresponding to the sound hole 211 and communicated with the sound hole 211 .

Without loss of generality, as shown in FIG. 1 , the sensor unit 20 further includes an ASIC (Application Specific Integrated Circuit) chip 70 disposed in the package casing 21 . The ASIC chip 70 is electrically connected to the sensor chip 22 for The electrical signals generated by the sensor chip 22 are processed.

Specifically, the ASIC chip 70 may be disposed on the surface of the substrate 213 , or the ASIC chip 70 may be embedded in the substrate 213 . It should be pointed out that the ASIC chip 70 is embedded in the substrate 213 , which can facilitate the assembly of the bone voiceprint sensor 100 .

Specifically, the substrate 213 is a circuit board, such as a PCB board, and the ASIC chip 70 is electrically connected to the sensor chip 22 and the substrate 213 .

Optionally, as shown in FIG. 1 , the connection board 214 is provided with an electrical connection portion 2141 for electrical connection with an external circuit (ie, a circuit of an electronic device), and the electrical connection portion 2141 is electrically connected to the substrate 213 to The electrical connection with the ASIC chip 70 and the sensor chip 22 is realized.

In this way, when the connection board 214 is mounted on the electric control board, the electrical connection part 2141 can be electrically connected with the electric control board, so that the sensor chip 22 can be electrically connected with the external circuit (ie, the circuit of the electronic device).

The sensor unit 20 further includes an electrical connector 23 , and the electrical connector 23 electrically connects the substrate 213 and the electrical connection portion 2141 . Optionally, the electrical connector 23 is embedded in the enclosure plate 215 .

Optionally, as shown in FIG. 1 , the elastic membrane 12 and the vibration adjusting member 13 are provided with first ventilation holes 121 .

Optionally, as shown in FIG. 1 , the sensing film 222 of the sensor chip 22 is provided with a second ventilation hole 223 .

Optionally, the sensor chip 22 may be a microphone chip or a pressure sensor chip 22 . That is, the sensor unit 20 can use a MEMS microphone or a MEMS pressure sensor, so that the design difficulty of the bone voiceprint sensor 100 can be reduced.

In another embodiment of the present invention, as shown in FIG. 3 , the vibration adjustment member 13 includes an adjustment base 131 connected with the elastic membrane 12 , and an adjustment protrusion 132 provided on the surface of the adjustment base 131 , The adjusting protrusion 132 extends into the sound hole 211 . Specifically, the adjustment protruding portion 132 also extends into the package casing 21 . In this way, the space utilization rate can be improved, so as to increase the quality of the vibration adjusting member 13 , which is beneficial to improve the sensitivity of the bone voiceprint sensor 100 module.

In this embodiment, it can be understood that the vibration adjusting member 13 is disposed on the side of the elastic membrane 12 facing the sound hole 211 .

In this embodiment, as shown in FIG. 3 , the sensor chip 22 is disposed corresponding to the sound hole 211 , and the adjustment protrusion 132 extends into the front cavity 221 of the sensor chip 22 through the sound hole 211 . In this way, the accuracy of the sensor chip 22 can be improved.

Moreover, it can be understood that in order to further increase the mass of the vibration adjusting member 13, the size of the adjusting protrusion 132 can be increased, and thus, the sound hole 211 needs to be enlarged. That is to say, by enlarging the sound hole 211, a larger size adjustment protrusion 132 can be accommodated, so as to further increase the mass of the vibration adjusting member 13; at the same time, due to the enlargement of the sound hole 211, the sensor chip 22 can be lowered. The influence of the front cavity 221 on the high frequency makes the high frequency flatter, so that the reliability of the bone voiceprint sensor 100 can be improved. In other words, the present invention can enlarge the acoustic hole 211 to reduce the influence of the front cavity 221 of the sensor chip 22 on high frequencies, so that the high frequencies are flatter, thereby improving the reliability of the bone voiceprint sensor 100 .

In this embodiment, as shown in FIG. 3 , the periphery of the acoustic hole 211 can be flush with the periphery of the front cavity 221 of the sensor chip 22 ; alternatively, the periphery of the acoustic hole 211 can be set in front of the sensor chip 22 Outside the perimeter of the cavity 221 . In this way, the interference of the sound hole 211 to the adjustment protrusion 132 can be avoided, so as to further increase the size of the adjustment protrusion 132 to increase the mass of the vibration adjustment member 13 , thereby reducing the front cavity 221 of the sensor chip 22 The impact on high frequencies makes the high frequencies flatter, so as to improve the reliability of the bone voiceprint sensor 100 .

In this embodiment, as shown in FIG. 3 , the projection of the adjustment protrusion 132 on the elastic membrane 12 has a first area, and the projection of the peripheral wall of the front cavity 221 of the sensor chip 22 on the elastic membrane 12 has For the second area, the ratio of the first area to the second area is greater than or equal to 0.1 and less than or equal to 0.99.

Optionally, the ratio of the first area to the second area is greater than or equal to 0.5 and less than or equal to 0.9.

Optionally, the ratio of the first area to the second area is greater than or equal to 0.6 and less than or equal to 0.8.

Optionally, the ratio of the first area to the second area is greater than or equal to 0.65 and less than or equal to 0.75.

It can be understood that the specifications of the sensor chip 22 are usually fixed, and the larger the ratio of the first area to the second area is, the more favorable it is to increase the quality of the vibration adjusting member 13; but if the ratio is too large, the Then, the adjustment protrusion 132 may interfere with the peripheral wall of the front cavity 221 of the sensor chip 22 during the vibration process, thereby affecting the performance of the bone voiceprint sensor 100 . Of course, the size of the ratio will also affect the gas volume of the front cavity 221 of the sensor chip 22, thereby affecting the performance of the sensor chip 22; therefore, in practical applications, the ratio of the first area to the second area can be designed according to the actual situation .

In this embodiment, as shown in FIG. 3 , the distance between the adjustment protrusion 132 and the sensing film 222 of the sensor chip 22 is greater than or equal to 10 μm.

Optionally, the distance between the adjustment protrusion 132 and the sensing film 222 of the sensor chip 22 may be 12 microns, 15 microns, 17 microns, 20 microns, 23 microns, or 25 microns, etc., or even larger.

It can be understood that the specifications of the sensor chip 22 are usually fixed, and the smaller the distance between the adjustment protrusion 132 and the sensing film 222 of the sensor chip 22 is, the more beneficial it is to increase the mass of the vibration adjustment member 13 However, if the distance is too small, the adjustment protrusion 132 may interfere with the sensing film 222 of the sensor chip 22 during the vibration process, thereby affecting the performance of the bone voiceprint sensor 100 . Of course, the size of the distance will also affect the amount of gas in the front cavity 221 of the sensor chip 22, thereby affecting the performance of the sensor chip 22; therefore, in practical applications, the distance between the protruding portion 132 and the sensing film 222 can be adjusted according to the actual situation spacing is designed.

It should be noted that, in practical applications, the ratio of the first area to the second area and the distance between the adjustment protrusion 132 and the sensing film 222 of the sensor chip 22 can be designed according to the actual situation, so as to be able to both The mass of the vibration adjusting member 13 can be increased to a large extent, and the performance of the sensor chip 22 can be guaranteed/improved, and the vibration of the adjusting protrusion 132 in the front cavity 221 can be prevented from being interfered.

In this embodiment, the adjustment protrusion 132 is provided in the middle of the adjustment base 131 . In this way, the elastic membrane 12 can be stressed evenly during the vibration process to reduce the risk of rupture; at the same time, the vibration stability of the elastic membrane 12 can be improved to improve the performance of the bone voiceprint sensor 100 .

In yet another embodiment of the present invention, as shown in FIG. 2 , the vibration adjusting member 13 includes an adjusting body 133 connected to the elastic membrane 12 and a lateral protrusion 134 disposed on the side of the adjusting body 133 , so A space for avoiding position is formed between the lateral protruding portion 134 and the elastic membrane 12 . Specifically, the lateral protruding portion 134 faces the side surface of the elastic film 12 , and forms an escape interval with the surface of the elastic film 12 . When the elastic membrane vibrates, the size of the avoidance interval will change with the vibration of the elastic membrane.

In this way, without increasing the connection area between the vibration adjusting member 13 and the elastic membrane 12, the space in the vibration pickup housing 11 can be effectively used to increase the mass of the vibration adjusting member 13, thereby improving the bone voiceprint. The sensitivity of the sensor 100 can be improved, so that the performance of the bone voiceprint sensor 100 can be improved;

That is to say, the bone voiceprint sensor 100 in this embodiment improves the space utilization rate, helps to reduce the size of the product, and improves the performance of the product.

Alternatively, without reducing the mass of the vibration adjusting member 13 , the connection area between the vibration adjusting member 13 and the elastic membrane 12 can be reduced, so as to improve the performance of the bone voiceprint sensor 100 .

In this embodiment, further, as shown in FIG. 2 , the lateral protruding portion 134 is an annular structure. In this way, on the one hand, the manufacturing difficulty of the vibration adjusting member 13 can be reduced, and on the other hand, the mass of the vibration adjusting member 13 can be greatly increased. Of course, in the parallel embodiment of this embodiment, a plurality of the lateral protruding portions 134 can also be provided, and the plurality of lateral protruding portions 134 are distributed at intervals in the circumferential direction of the adjusting body 133 . .

In this embodiment, further, as shown in FIG. 2 , the adjusting body 133 includes a first adjusting portion 1331 connected to the elastic film 12 , and a first adjusting portion 1331 connected to the side of the first adjusting portion 1331 away from the elastic film 12 . For the second adjusting portion, the lateral protruding portion 134 is provided on the side surface of the second adjusting portion. In this way, an avoidance interval can be formed between the lateral protruding portion 134 and the elastic membrane 12 .

In this embodiment, the lateral protruding portion 134 , the first adjusting portion 1331 and the second adjusting portion can be integrally provided; the lateral protruding portion 134 and the second adjusting portion can also be integrally provided with The first regulating part 1331 is connected in a separate fit.

In this embodiment, further, as shown in FIG. 2 , the thickness of the lateral protruding portion 134 is equal to the thickness of the second adjusting portion. In this way, the vibration adjusting member 13 has a stepped structure, so that the mass of the vibration adjusting member 13 can be greatly increased.

In this embodiment, further, the outer contour shape of the lateral protruding portion 134 is the same as the outer contour shape of the first regulating portion 1331 .

In this embodiment, further, the ratio of the thickness of the second adjusting portion to the thickness of the first adjusting portion 1331 is greater than or equal to 0.1 and less than or equal to 100. It can be understood that if the ratio is too large, the lateral protrusions 134 will easily interfere with the elastic membrane 12 during the vibration process; if the ratio is too small, it is not conducive to increasing the mass of the vibration adjusting member 13 . Optionally, the ratio of the thickness of the second adjusting portion to the thickness of the first adjusting portion 1331 is greater than or equal to 0.2 and less than or equal to 10; or, the thickness of the second adjusting portion is greater than or equal to the thickness of the first adjusting portion 1331 The thickness ratio is greater than or equal to 0.3 and less than or equal to 6.

In this embodiment, further, the projection of the lateral protruding portion 134 and the second adjusting portion on the elastic film 12 has a first area, and the projection of the first adjusting portion 1331 on the elastic film 12 has a first area Having a second area, the ratio of the second area to the first area is greater than 1 and less than or equal to 100. It can be understood that if the ratio is too small, it is unfavorable to increase the mass of the vibration adjusting member 13; if the ratio is too large, it is easy to cause "top-heavy". Optionally, the ratio of the second area to the first area is greater than or equal to 1.1 and less than or equal to 10; or, the ratio of the second area to the first area is greater than or equal to 1.2 and less than or equal to 6.

In this embodiment, the vibration adjusting member 13 can be provided on any side of the elastic membrane 12 .

Of course, in this embodiment, by designing the lateral protruding portion 134, the vibration adjusting member 13 can be a stepped structure with three steps, or four steps, or more steps.

Of course, in this embodiment, by designing the lateral protrusions 134, the longitudinal section of the vibration adjusting member 13 (that is, the section passing through the center line of the vibration adjusting member 13) can also be a trapezoid or a waist shape. .

In addition, it should be pointed out that the technical solutions between the above embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions contradicts or cannot be realized, it should be considered that such The combination of technical solutions does not exist and is not within the protection scope required by the present invention. In yet another embodiment of the present invention, as shown in FIG. 4 , the vibration adjusting member 13 may include an adjusting base portion 131 connected to the elastic membrane 12 and an adjusting protruding portion 132 provided on the surface of the adjusting base portion 131 . , the adjustment base 131 includes an adjustment body 133 connected to the elastic film 12 and a lateral protrusion 134 provided on the side of the adjustment body 133 , and an avoidance is formed between the lateral protrusion 134 and the elastic film 12 . position interval; the adjusting protrusion 132 extends into the sound hole 211 . Specifically, the lateral protruding portion 134 faces the side surface of the elastic film 12 , and forms an escape interval with the surface of the elastic film 12 . When the elastic membrane vibrates, the size of the avoidance interval will change with the vibration of the elastic membrane.

In this way, the space utilization rate can be greatly improved to increase the quality of the vibration adjusting member 13 , so that the sensitivity of the bone voiceprint sensor 100 module can be improved, so as to improve the performance of the bone voiceprint sensor 100 module; and it is beneficial to The miniaturized design of the bone voiceprint sensor 100 module is realized.

When the bone voiceprint sensor is applied to an electronic device, in one embodiment, the electronic device includes the bone voiceprint sensor as described above.

Specifically, the electronic device further includes an electric control board, the connection board of the bone voiceprint sensor is mounted on the electric control board, and the air leakage hole on the connection board is blocked by colloid.

The above descriptions are only optional embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. Under the inventive concept of the present utility model, the equivalent structure transformations made by using the contents of the present utility model description and accompanying drawings, Or directly/indirectly applied in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. a bone voiceprint sensor, is characterized in that, comprises: a vibration pickup unit, the vibration pickup unit includes a vibration pickup housing and an elastic membrane disposed in the vibration pickup housing; and A sensor unit, the sensor unit includes a package housing and a sensor chip arranged in the package housing, the package housing is provided with a sound hole and a vent hole, and the vibration pickup housing is mounted on the package housing , the sound hole communicates with the vibration pickup housing and the packaging housing; the air vent hole is used to release pressure when the vibration pickup unit and the sensor unit are assembled. 2 . The bone voiceprint sensor according to claim 1 , wherein the encapsulation shell comprises a connection board, and the connection board is used for being mounted on a main control board of an electronic device, and the air vent is provided in the connection board. 3 . The bone voiceprint sensor according to claim 2 , wherein the package housing further comprises a substrate, the substrate is arranged opposite to the connection plate, and the acoustic hole and the sensor chip are arranged on the the base plate; the vibration pickup housing is mounted on the base plate. 4 . The bone voiceprint sensor of claim 1 , wherein the vent hole is disposed away from the sensor chip. 5 . 5 . The bone voiceprint sensor according to claim 1 , wherein the cross-sectional area of the vent hole is greater than or equal to 10 square micrometers. 6 . 6. The bone voiceprint sensor according to any one of claims 1 to 4, wherein a plurality of the vent holes are distributed at intervals. 7. The bone voiceprint sensor according to any one of claims 1 to 4, wherein the vibration pickup unit further comprises a vibration adjusting member disposed on the elastic membrane, the vibration adjusting member comprising a An adjustment base connected to the elastic membrane, and an adjustment protruding part provided on the surface of the adjustment base, the adjustment protruding part extending into the sound hole. 8 . The bone voiceprint sensor according to claim 7 , wherein the sensor chip is disposed corresponding to the acoustic hole, and the adjustment protrusion extends into the front cavity of the sensor chip. 9 . 9. The bone voiceprint sensor according to any one of claims 1 to 4, wherein the vibration pickup unit further comprises a vibration adjusting member disposed on the elastic membrane, the vibration adjusting member comprising a An adjustment body connected to the elastic film, and a lateral protruding portion provided on the side surface of the adjustment main body, a space avoiding space is formed between the lateral protruding portion and the elastic film; or, The vibration pickup unit further includes a vibration adjustment member disposed on the elastic film, the vibration adjustment member includes an adjustment base connected with the elastic film, and an adjustment protrusion disposed on the surface of the adjustment base, The adjustment base includes an adjustment body connected with the elastic film, and a lateral protruding portion provided on the side surface of the adjustment main body, and an avoidance interval is formed between the lateral protruding portion and the elastic film ; The adjusting protrusion extends into the sound hole. 10. An electronic device, comprising the bone voiceprint sensor according to any one of claims 1 to 9.

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