Acoustic sensor and electronic device

Abstract

The utility model discloses an acoustic sensor and electronic equipment. Wherein the acoustic sensor comprises a shell and a protection component, the shell is provided with an accommodating space and comprises a sound hole, and the accommodating space is communicated with the outside through the sound hole; the protection component comprises a shielding part and a fixing part, the fixing part is connected to the shell, and the shielding part is connected with the fixing part and arranged at one end of the sound hole; the orthographic projection of the shielding part to the sound hole is at least partially overlapped with the sound hole, and a gap is reserved between at least part of the orthographic projection and the hole wall of the sound hole. According to the acoustic sensor and the electronic equipment provided by the technical scheme of the utility model, the anti-blowing capability of the acoustic sensor is improved by using the protection component, the risk that internal components of the acoustic sensor are damaged under the direct action of external airflow is reduced, and the service life of the acoustic sensor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic products, in particular to an acoustic sensor and an electronic device applying the acoustic sensor. Background Art

[0002] In recent years, MEMS microphones integrated by MEMS technology have been widely used in smart electronic mobile devices such as mobile phones, notebooks, smart wearables, headphones, controllers, etc.

[0003] The acoustic sensor of the related art usually uses a sound hole with a larger diameter to directly connect the cavity of the acoustic sensor with the outside world, so that the sound waves can be transmitted from the outside world to the inside of the cavity of the acoustic sensor through the sound hole, and then received by the acoustic chip and converted into electrical signals. However, the acoustic sensor of the related art does not have any protective measures on the transmission path of the sound waves from the outside world to the inside of the acoustic sensor cavity. When the acoustic sensor is in a strong airflow environment, the strong airflow can easily enter the cavity through the sound hole and directly impact the acoustic chip, causing the acoustic sensor to be easily damaged, affecting the service life of the acoustic sensor. Utility Model Content

[0004] The main purpose of the utility model is to provide an acoustic sensor and an electronic device, aiming to improve the anti-blowing ability of the acoustic sensor and to increase the service life of the acoustic sensor and the electronic device.

[0005] To achieve the above-mentioned purpose, in a first aspect, an embodiment of the utility model proposes an acoustic sensor, which includes a shell and a protective component, wherein the shell has a accommodating space and includes a sound hole, and the sound hole connects the accommodating space with the outside world; the protective component includes a shielding part and a fixing part, the fixing part is connected to the shell, and the shielding part is connected to the fixing part and is arranged at one end of the sound hole; the shielding part has an orthographic projection to the sound hole that at least partially overlaps with the sound hole, and a gap is left between at least part of the shielding part and the hole wall of the sound hole.

[0006] According to an embodiment of the first aspect of the utility model, the orthographic projection of the shielding portion onto the sound hole completely overlaps with the sound hole, and a peripheral edge of the shielding portion and a hole wall of the sound hole form an annular gap.

[0007] According to an embodiment of the first aspect of the utility model, the sound hole is in a straight cylindrical shape and includes a first section and a second section that are connected, the aperture of the first section is larger than the aperture of the second section; the shielding portion is arranged at one end of the first section away from the second section.

[0008] According to an embodiment of the first aspect of the utility model, along the connecting direction between the first section and the second section, the cross-sectional area of ​​the shielding portion is smaller than the cross-sectional area of ​​the first section and larger than the cross-sectional area of ​​the second section.

[0009] According to an embodiment of the first aspect of the utility model, the fixing portion is annular, and is arranged around the periphery of the shielding portion; an annular gap is formed between the shielding portion and the fixing portion.

[0010] According to an embodiment of the first aspect of the utility model, the protection component further includes a connecting portion, the connecting portion is arranged in the annular gap, and two ends of the connecting portion are respectively connected to the shielding portion and the fixing portion.

[0011] According to an embodiment of the first aspect of the utility model, the protection component is accommodated in the accommodation space.

[0012] According to an embodiment of the first aspect of the utility model, the housing includes a circuit board substrate and a shell, the circuit board substrate is connected to the shell and together form a containing space; the sound hole is arranged in the circuit board substrate and / or the shell.

[0013] According to an embodiment of the first aspect of the utility model, the acoustic hole is arranged in the circuit board substrate, and the acoustic sensor further comprises a chip accommodated in the accommodation space; the fixing part is arranged between the chip and the circuit board substrate, and the fixing part is connected to the chip.

[0014] In a second aspect, an embodiment of the present utility model further provides an electronic device, which includes the acoustic sensor provided by any embodiment of the first aspect.

[0015] The technical solution of the utility model is to set a protective component including a shielding part and a fixing part, so that the shielding part is set at one end of the sound hole, and the positive projection of the shielding part to the sound hole is limited to at least partially overlap with the sound hole, and a gap is left between at least part of the shielding part and the hole wall of the sound hole, so that the external sound signal can pass into the accommodating space through the gap between the shielding part and the hole wall of the sound hole, and when the acoustic sensor is in an environment with a large external airflow intensity, the shielding part can also block part of the airflow, reducing the probability of the airflow directly impacting the internal components of the acoustic sensor, thereby improving the anti-blowing ability of the acoustic sensor, reducing the risk of damage to the internal components of the acoustic sensor under the direct action of external airflow, and improving the service life of the acoustic sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1It is a schematic diagram of a three-dimensional cross-sectional structure of an acoustic sensor provided in one embodiment of the utility model;

[0018] Figure 2 yes Figure 1 An enlarged view of part A of the acoustic sensor is shown;

[0019] Figure 3 It is a schematic cross-sectional structure diagram of an acoustic sensor provided by an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the planar structure of a protective structure in an acoustic sensor provided by an embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the planar structure of a protective structure in an acoustic sensor provided by another embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] Label name Label name 100 Acoustic Sensors 10 shell 11 sound hole 111 Paragraph 1 112 Paragraph 2 12 Circuit board substrate 13 case 20 Protective components 21 Blocking part 22 Fixed part 23 Connection 101 Accommodation space 30 chip

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Acoustic sensors in related technologies usually use a sound hole with a larger diameter to directly connect the cavity of the acoustic sensor with the outside world, so that sound waves can propagate from the outside world to the inside of the cavity of the acoustic sensor through the sound hole, and then be received by the acoustic chip and converted into electrical signals.

[0029] However, the acoustic sensor of the related technology does not have any protective measures on the transmission path of sound waves from the outside world to the inside of the acoustic sensor cavity. When the acoustic sensor is in a strong airflow environment, the strong airflow can easily enter the cavity through the sound hole and directly impact the acoustic chip, causing the acoustic sensor to be easily damaged and affecting the service life of the acoustic sensor.

[0030] In view of this, in order to alleviate the direct impact of external airflow on the internal structure of the acoustic sensor and protect the internal components, the utility model provides an acoustic sensor 100 and an electronic device having the acoustic sensor 100.

[0031] Figure 1 It is a schematic diagram of a three-dimensional cross-sectional structure of an acoustic sensor provided in one embodiment of the utility model; Figure 2 yes Figure 1 An enlarged view of part A of the acoustic sensor is shown; Figure 3 It is a schematic cross-sectional structure diagram of an acoustic sensor provided by an embodiment of the utility model; Figure 4 It is a schematic diagram of the planar structure of a protective structure in an acoustic sensor provided by an embodiment of the utility model; Figure 5 It is a schematic diagram of the planar structure of a protective structure in an acoustic sensor provided by another embodiment of the utility model.

[0032] Please refer to Figures 1 to 5 The embodiment of the utility model proposes an acoustic sensor 100, which includes a shell 10 and a protective component 20, wherein the shell 10 has a accommodating space 101 and includes a sound hole 11, and the sound hole 11 connects the accommodating space 101 with the outside; the protective component 20 includes a shielding portion 21 and a fixing portion 22, the fixing portion 22 is connected to the shell 10, and the shielding portion 21 is connected to the fixing portion 22 and is arranged at one end of the sound hole 11; the orthographic projection of the shielding portion 21 to the sound hole 11 at least partially overlaps with the sound hole 11, and a gap is left between at least part of the shielding portion 21 and the hole wall of the sound hole 11.

[0033] The acoustic sensor 100 is an energy conversion device that converts a sound signal into an electrical signal. In these embodiments of the present invention, the acoustic sensor 100 may be a dynamic microphone, a condenser microphone, an electret microphone or a silicon microphone. In these embodiments of the present invention, the acoustic sensor 100 is described as a silicon microphone.

[0034] The housing 10 is an external structural component of the acoustic sensor 100 , and is used to provide protection for components such as an acoustic chip and an integrated circuit chip inside the acoustic sensor 100 , and to provide a relatively sealed and stable working environment.

[0035] Among them, the shell 10 has a accommodating space 101 and includes a sound hole 11, which means that the shell 10 can be a surrounding structure, and the space enclosed by the surrounding structure is at least partially the aforementioned accommodating space 101. The aforementioned acoustic chip, integrated circuit chip and other components are accommodated in the accommodating space 101, so that they can work in a relatively sealed and stable environment.

[0036] The sound hole 11 connects the accommodating space 101 with the outside world, which means that the sound hole 11 is a channel for sound to enter the acoustic sensor 100 . During the use of the acoustic sensor 100 , external sound signals can be transmitted into the accommodating space 101 through the sound hole 11 .

[0037] The function of the protective component 20 is to reduce the direct impact of external airflow on the internal components of the acoustic sensor 100 when external sound enters the accommodating space 101 through the sound hole 11, thereby reducing the risk of damage to the internal components, improving the anti-blowing ability of the acoustic sensor 100, and further improving the service life of the acoustic sensor 100.

[0038] In these embodiments of the present invention, the protective component 20 includes a shielding portion 21 and a fixing portion 22, which means that the protective component 20 has two different functional portions, wherein the shielding portion 21 serves to shield the sound hole 11, so as to block the airflow directly impacting the accommodating space 101 from the outside, thereby reducing the direct impact of the external airflow on the internal components of the acoustic sensor 100; the fixing portion 22 serves to fix the protective component 20 itself.

[0039] Among them, the fixing part 22 is connected to the shell 10. A possible implementation method is that the fixing part 22 and the shell 10 are fixedly connected by welding, bonding, or even integrally formed. Alternatively, in some embodiments, the fixing part 22 and the shell 10 can also be detachably connected by a snap connection.

[0040] The shielding portion 21 is connected to the fixing portion 22, which means that in these embodiments of the present invention, the fixing portion 22 provides support for the shielding portion 21 so that the shielding portion 21 can maintain a relative positional relationship with the sound hole 11; the shielding portion 21 is set at one end of the sound hole 11, which means that along the connection direction of the sound hole 11 (the outside world and the storage space 101), the shielding portion 21 can be set at either end or at both ends. In this way, the shielding portion 21 can be used to shield the sound hole 11, reducing the risk of external airflow directly impacting the internal components of the storage space 101, thereby increasing the service life of the acoustic sensor 100.

[0041] The orthographic projection of the shielding portion 21 onto the sound hole 11 at least partially overlaps with the sound hole 11, and a gap is left at least partially between the shielding portion 21 and the hole wall of the sound hole 11, wherein the orthographic projection of the shielding portion 21 onto the sound hole 11 refers to a cross-section along one end of the sound hole 11 close to the shielding portion 21, and the projection of the shielding portion 21 onto the cross-section.

[0042] There is a gap between at least part of the shielding portion 21 and the wall of the sound hole 11, which means that there is a gap between at least part of the positive projection of the shielding portion 21 onto the sound hole 11 and the wall of the sound hole 11, so that external sound signals can enter the accommodating space 101 through the sound hole 11.

[0043] Exemplarily, in some embodiments, the orthographic projection of the shielding portion 21 onto the sound hole 11 can be set to partially overlap with the sound hole 11. In this case, the overlapping portion of the shielding portion 21 can be used to block the external airflow, and the external sound signal and part of the airflow can enter the accommodating space 101 through the non-overlapping portion.

[0044] In some embodiments, the shielding portion 21 may be arranged such that its projection onto the sound hole 11 falls within the sound hole 11 . In this case, the entire shielding portion 21 may be used to block the external airflow, and the external sound signal and part of the airflow may enter the accommodating space 101 through the periphery of the shielding portion 21 .

[0045] In some embodiments, the orthographic projection of the shielding portion 21 onto the sound hole 11 can also be set to completely overlap with the sound hole 11. At this time, the shielding portion 21 can be moved a certain distance in the direction away from the sound hole 11, so that a gap can be formed between the shielding portion 21 and the sound hole 11, thereby reducing the probability that the shielding portion 21 completely blocks the sound hole 11. At this time, external sound signals and airflow can enter the accommodating space 101 through the gap between the shielding portion 21 and the sound hole 11.

[0046] In these embodiments of the present invention, when the overlap between the orthographic projection area of ​​the shielding portion 21 and the acoustic hole 11 is larger, the shielding portion 21 has a better blocking effect on the external airflow, and at the same time, it will make it more difficult for the external sound signal to be captured by the acoustic chip in the accommodating space 101, that is, it will affect the sensitivity of the acoustic chip in the accommodating space 101. Therefore, the above embodiments can be selected according to the purpose, usage scenario and environmental factors of the acoustic sensor 100.

[0047] It should be noted that, in some embodiments, there may be a plurality of sound holes 11 . In this case, the number of protection components 20 may be the same as the number of sound holes 11 , so that each sound hole 11 is provided with a protection component 20 .

[0048] According to the acoustic sensor 100 provided by the utility model, a protective component 20 including a shielding portion 21 and a fixing portion 22 is provided, so that the shielding portion 21 is arranged at one end of the sound hole 11, and it is limited that the positive projection of the shielding portion 21 to the sound hole 11 at least partially overlaps with the sound hole 11, and a gap is left between at least part of the shielding portion 21 and the hole wall of the sound hole 11, so that the external sound signal can pass into the accommodating space 101 through the gap between the shielding portion 21 and the hole wall of the sound hole 11, and when the acoustic sensor 100 is in an environment with a large external airflow intensity, the shielding portion 21 can also block part of the airflow, reducing the probability of the airflow directly impacting the internal components of the acoustic sensor 100, thereby improving the anti-blowing ability of the acoustic sensor 100, reducing the risk of damage to the internal components of the acoustic sensor 100 under the direct action of the external airflow, and improving the service life of the acoustic sensor 100.

[0049] According to an embodiment of the first aspect of the present invention, the orthographic projection of the shielding portion 21 onto the sound hole 11 completely overlaps with the sound hole 11 , and the periphery of the shielding portion 21 and the hole wall of the sound hole 11 form an annular gap.

[0050] The orthographic projection of the shielding portion 21 onto the sound hole 11 completely overlaps with the sound hole 11, which means that the orthographic projection of the shielding portion 21 onto the sound hole 11 falls within the sound hole 11, so that the shielding portion 21 is arranged on the flow path from the outside to the inside of the accommodating space 101 through the sound hole 11, and the shielding portion 21 as a whole can be used to block the strong airflow from the outside to the accommodating space 101.

[0051] The periphery of the shielding portion 21 and the hole wall of the sound hole 11 form an annular gap, which means that the portion of the sound hole 11 that is not blocked by the shielding portion 21 (located at the periphery of the shielding portion 21) forms an annular gap, so that the annular gap can serve as a sound-permeable space for external sound to enter the accommodating space 101. In this way, after being blocked and diverted by the shielding portion 21, the external airflow can be evenly splashed around, so as to increase the probability of external sound signals being captured by the acoustic chip, thereby improving the sensitivity of the acoustic sensor 100.

[0052] According to an embodiment of the first aspect of the utility model, the sound hole 11 is straight-cylindrical and includes a first section 111 and a second section 112 which are connected, the aperture of the first section 111 is larger than the aperture of the second section 112; the shielding portion 21 is arranged at one end of the first section 111 away from the second section 112.

[0053] The sound hole 11 is in a straight cylindrical shape, which means that the sound hole 11 is a straight line structure. During the molding process, the sound hole 11 can be formed by penetrating the wall of the shell 10 along the thickness direction to directly connect the outside with the accommodating space 101.

[0054] The sound hole 11 includes a first section 111 and a second section 112 that are connected. The aperture of the first section 111 is larger than the aperture of the second section 112, which means that the sound hole 11 includes two parts with different apertures. In these embodiments of the present invention, the first section 111 and the second section 112 can be set coaxially. In this way, when setting the protective component 20, the shielding part 21 can be set to have a positive projection area to the sound hole 11 that is the same as the second section 112 with a smaller aperture, and the shielding part 21 can be set at the end of the first section 111 away from the second section 112. In this way, since the external airflow is faster in the second section 112 during the process of entering the accommodating space 101 through the sound hole 11, the blocking of the shielding part 21 can weaken the impact energy of the airflow, and change the airflow direction in the first section 111, so that the gas that originally moved axially at high speed in the second section 112 is turned to the opposite direction after being blocked by the shielding part 21. It diffuses radially outward and eventually enters the accommodating space 101 through the gap between the shielding portion 21 and the hole wall of the first section 111, which has a better energy offset effect. In addition, since there is a gap between the projection of the shielding portion 21 onto the sound hole 11 and the hole wall of the first section 111, there is no need to worry about the shielding portion 21 completely blocking the second section 112 during installation. The protective component 20 can be fitted to the sound hole 11 as much as possible, thereby saving space in the accommodating space 101, which is beneficial to the arrangement of other components in the acoustic sensor 100 and the adjustment of the acoustic performance, and is beneficial to the miniaturized design of the acoustic sensor 100.

[0055] It should be noted that in these embodiments of the present invention, the aperture of the first section 111 is larger than the aperture of the second section 112, which is based on the description that the cross-sectional shape of the sound hole 11 is circular. In some embodiments, the sound hole 11 can be set to be, but not limited to, a rectangular hole, a triangular hole, an elliptical hole, etc. In this case, the cross-sectional area of ​​the first section 111 can be set larger than the cross-sectional area of ​​the second section 112, and the cross-sectional shape of the second section 112 can be regarded as a proportional reduction of the cross-sectional shape of the first section 111.

[0056] According to an embodiment of the first aspect of the present invention, along the communication direction between the first section 111 and the second section 112 , the cross-sectional area of ​​the shielding portion 21 is smaller than the cross-sectional area of ​​the first section 111 and larger than the cross-sectional area of ​​the second section 112 .

[0057] In this way, setting the cross-sectional area of ​​the shielding portion 21 larger than the cross-sectional area of ​​the second section 112 can further enhance the blocking effect of the shielding portion 21 on the high-speed gas in the second section 112, and further reduce the probability of external high-speed airflow directly impacting other components in the accommodating space 101. At the same time, a gap can be stably formed between the shielding portion 21 and the first section 111, that is, a sound-transmitting space for external sound signals to be transmitted, thereby enhancing the sensitivity of the acoustic sensor 100.

[0058] According to an embodiment of the first aspect of the present invention, the fixing portion 22 is annular, and the fixing portion 22 is disposed around the periphery of the shielding portion 21 ; an annular gap is formed between the shielding portion 21 and the fixing portion 22 .

[0059] The fixing portion 22 is ring-shaped. In these embodiments, the fixing portion 22 may be, but is not limited to, set to be in a circular ring shape, a rectangular ring shape, etc.

[0060] The fixing portion 22 is arranged around the periphery of the shielding portion 21, which means that the fixing portion 22 and the shielding portion 21 are not in contact with each other, and the shielding portion 21 is located in the middle of the annular fixing portion 22. During the installation of the protection member 20, the fixing portion 22 can be arranged around the periphery of the end wall of one end of the sound hole 11, and then the sound hole 11 is shielded by the shielding portion 21 in the middle.

[0061] An annular gap is formed between the shielding portion 21 and the fixing portion 22, so that during the use of the acoustic sensor 100, the annular gap cooperates with the gap between the shielding portion 21 and the wall of the sound hole 11 to form a sound-transmitting space, thereby reducing the difficulty of external sound signals being transmitted into the accommodating space 101, thereby improving the sensitivity of the acoustic sensor 100.

[0062] According to an embodiment of the first aspect of the present invention, the protection component 20 further includes a connecting portion 23 , which is disposed in the annular gap, and two ends of the connecting portion 23 are respectively connected to the shielding portion 21 and the fixing portion 22 .

[0063] The function of the connecting portion 23 is to connect the shielding portion 21 with the fixing portion 22 , that is, to provide support for the shielding portion 21 .

[0064] In these embodiments of the present invention, the connection portion 23 is arranged in the annular gap, which means that the connection portion 23 does not protrude from the shielding portion 21 or the fixing portion 22 along the thickness direction of the protection member 20, so as to connect the shielding portion 21 with the fixing portion 22 in the annular gap. In this way, the occupation of the accommodating space 101 by the connection portion 23 in the thickness direction can be reduced, further saving the space of the accommodating space 101.

[0065] The two ends of the connecting portion 23 are respectively connected to the shielding portion 21 and the fixing portion 22. A possible implementation method is that a snap-fit ​​structure is respectively provided between the two ends of the connecting portion 23 and the shielding portion 21 and the fixing portion 22, so that the connecting portion 23 can be connected to the shielding portion 21 or the fixing portion 22 through the snap-fit ​​structure, which is beneficial to the maintenance and replacement of the acoustic sensor 100; in some embodiments, the shielding portion 21, the fixing portion 22 and the connecting portion 23 can also be integrally formed to enable the protective component 20 to obtain better structural consistency, further enhance the impact resistance of the shielding portion 21, and improve reliability.

[0066] It should be noted that the connection part 23 will inevitably affect the size of the annular gap, and thus affect the size of the sound-transmitting area for external sound to enter the accommodation space 101 during use. Based on this, the number and shape of the connection parts 23 can be selected according to the specific needs of the acoustic sensor 100 product, and this application does not limit it.

[0067] For example, in some embodiments, the connection portion 23 may be arranged in a straight strip shape. In some embodiments, the side of the connection portion 23 may be arranged in a curved shape so that the annular gap is divided into a plurality of circular spaces.

[0068] According to an embodiment of the first aspect of the present invention, the protective member 20 is accommodated in the accommodation space 101. The accommodation space 101 is used to provide a more stable working environment for the protective member 20, reduce the risk of the protective member 20 falling off during falling or vibration, and further improve the reliability of the acoustic sensor 100.

[0069] According to an embodiment of the first aspect of the present invention, the housing 10 includes a circuit board substrate 12 and a shell 13 , the circuit board substrate 12 is connected to the shell 13 and together form a receiving space 101 ; the sound hole 11 is set in the circuit board substrate 12 and / or the shell 13 .

[0070] In these embodiments of the present invention, the circuit substrate 12 and the housing 13 may be connected by adhesive connection to provide a better connection effect in the acoustic sensor 100 with a smaller volume, thereby forming a more stable accommodation space 101 .

[0071] In these embodiments, the acoustic hole 11 may be provided only on the circuit board substrate 12. Since the acoustic chip in the acoustic sensor 100 is usually connected to the circuit board substrate 12 and covers the acoustic hole 11 to improve the sensitivity of the acoustic chip, at this time, the protective component 20 may be used to provide protection for the more fragile diaphragm or back plate in the acoustic chip to reduce the direct impact of external airflow on the diaphragm or back plate; in some embodiments, the acoustic hole 11 may be provided only on the shell 13. At this time, the protective component 20 may reduce the impact of external airflow on the integrated circuit chip, or the gold wire between the integrated circuit chip and the acoustic chip; in some embodiments, the acoustic hole 11 may be opened on the circuit board substrate 12 and the shell 13 at the same time. At this time, two protective components 20 may be provided to respectively block the two acoustic holes 11 to improve the service life of the internal components of the acoustic sensor 100 and improve reliability.

[0072] According to an embodiment of the first aspect of the utility model, the sound hole 11 is arranged on the circuit board substrate 12, and the acoustic sensor 100 also includes a chip 30 accommodated in the accommodating space 101; the fixing part 22 is arranged between the chip 30 and the circuit board substrate 12, and the fixing part 22 is connected to the chip 30.

[0073] The function of the chip 30 is to sense external sound signals and convert the sound signals into electrical signals. In these embodiments of the present invention, the chip 30 may be the aforementioned acoustic chip.

[0074] The fixing part 22 is arranged between the chip 30 and the circuit board substrate 12, and the fixing part 22 is connected to the chip 30. A possible implementation method is that the fixing part 22 and the circuit board substrate 12 are fixedly connected by gluing, and the fixing part 22 and the chip 30 are fixedly connected by gluing, so as to further improve the consistency of the internal structure of the acoustic sensor 100 and improve reliability.

[0075] An embodiment of the utility model further provides an electronic device, which includes the acoustic sensor 100 provided by any embodiment of the first aspect mentioned above.

[0076] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An acoustic sensor, characterized in that: include: The housing has a receiving space and includes a sound hole, wherein the sound hole connects the receiving space with the outside; A protective component, comprising a shielding portion and a fixing portion, wherein the fixing portion is connected to the housing, and the shielding portion is connected to the fixing portion and is arranged at one end of the sound hole; The orthographic projection of the shielding portion onto the sound hole at least partially overlaps with the sound hole, and a gap is left between at least part of the shielding portion and the hole wall of the sound hole.

2. The acoustic sensor according to claim 1, characterized in that: The orthographic projection of the shielding portion onto the sound hole completely overlaps with the sound hole, and a peripheral edge of the shielding portion and a hole wall of the sound hole form an annular gap.

3. The acoustic sensor according to claim 1, characterized in that: The sound hole is in a straight cylindrical shape and includes a first section and a second section that are connected, and the aperture of the first section is larger than the aperture of the second section; The shielding portion is disposed at an end of the first section away from the second section.

4. The acoustic sensor according to claim 3, characterized in that: Along the communication direction between the first section and the second section, the cross-sectional area of ​​the shielding portion is smaller than the cross-sectional area of ​​the first section and larger than the cross-sectional area of ​​the second section.

5. The acoustic sensor according to any one of claims 1 to 4, characterized in that: The fixing portion is annular and is disposed around the periphery of the shielding portion; An annular gap is formed between the shielding portion and the fixing portion.

6. The acoustic sensor according to claim 5, characterized in that: The protection component further includes a connecting portion, which is disposed in the annular gap, and two ends of the connecting portion are respectively connected to the shielding portion and the fixing portion.

7. The acoustic sensor according to any one of claims 1 to 4, characterized in that: The protection member is accommodated in the accommodation space.

8. The acoustic sensor according to claim 7, characterized in that: The housing comprises a circuit board substrate and a shell, wherein the circuit board substrate is connected to the shell and together forms the accommodation space; The sound hole is arranged on the circuit board substrate and / or the housing.

9. The acoustic sensor according to claim 8, characterized in that The acoustic hole is arranged on the circuit board substrate, and the acoustic sensor further comprises a chip accommodated in the accommodation space; The fixing portion is disposed between the chip and the circuit board substrate, and the fixing portion is connected to the chip.

10. An electronic device, characterized in that: Comprising the acoustic sensor according to any one of claims 1 to 9.

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