VIBRATION SENSORS

A vibration sensor (200) is provided, comprising: a vibration receiver (210) including a housing (211) and a vibration unit (212), the housing (211) forming an acoustic cavity, the vibration unit (212) being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity (213) and a second acoustic cavity (214); and an acoustic transducer (220) acoustically connected to the first acoustic cavity (213). The housing (211) is configured to generate a vibration based on an external vibration signal, the vibration unit (212) changes an acoustic pressure within the first acoustic cavity (213) in response to the vibration of the housing (211), causing the acoustic transducer (220) to generate an electrical signal. The vibration unit (212) includes a quality element (2121) and an elastic element (2122), an area of the quality element (2121) on a side away from the acoustic transducer (220) is smaller than an area of the quality element (2121) on a side close to the acoustic transducer. The elastic element (2122) is connected around a side wall of the quality element (2121).

TECHNICAL FIELD

The present disclosure relates to the technical field of acoustics, and in particular to a vibration sensor.

BACKGROUND

A vibration sensor is an energy transducer that converts a vibration signal into an electrical signal. Currently, the vibration sensor may be used as a bone conduction microphone. The vibration sensor can detect the vibration signal transmitted through the skin when a person speaks, thus detecting the speech signal while not being disturbed by external noise. At present, the structure of vibration components in the vibration sensor is not stable, which leads to the problem of low product yield in the production process of the vibration sensor and the low sensitivity of the vibration sensor in the working process.

Therefore, it is desirable to provide a vibration sensor with strong structural stability as well as high sensitivity.

SUMMARY

One embodiment of the present disclosure provides a vibration sensor, comprising: a vibration receiver including a housing and a vibration unit, the housing forming an acoustic cavity, the vibration unit being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity and a second acoustic cavity; and an acoustic transducer acoustically connected to the first acoustic cavity, wherein the housing is configured to generate a vibration based on an external vibration signal, the vibration unit changes an acoustic pressure within the first acoustic cavity in response to the vibration of the housing, causing the acoustic transducer to generate an electrical signal; the vibration unit includes a quality element and an elastic element, an area of the quality element on a side away from the acoustic transducer is smaller than an area of the quality element on a side close to the acoustic transducer, and the elastic element is connected around a side wall of the quality element.

In some embodiments, the quality element includes a first quality element and a second quality element, the second quality element being located close to the acoustic transducer, the first quality element being located on a side of the second quality element away from the acoustic transducer, a cross-sectional area of the first quality element perpendicular to a vibration direction of the quality element being smaller than a cross-sectional area of the second quality element perpendicular to the vibration direction of the quality element.

In some embodiments, the first quality element is located in a central region of the second quality element, and a side wall of the first quality element has a specific distance to a side wall of the second quality element.

In some embodiments, the specific distance is in a range of 10 um to 500 um.

In some embodiments, the elastic element includes a first elastic portion and a second elastic portion, two ends of the first elastic portion being connected to the side wall of the first quality element and to the second elastic portion, respectively, the second elastic portion extending toward and connected to the acoustic transducer.

In some embodiments, the first elastic portion includes a first side surface and a second side surface, the first side surface being connected to the side wall of the first quality element, and the second side surface being connected to a surface exposed to the second acoustic cavity on the second quality element.

In some embodiments, the side wall of the second quality element is connected to the second elastic portion.

In some embodiments, the acoustic transducer includes a substrate, the second elastic portion extending toward and connected to the substrate, the substrate, the second quality element and the second elastic portion forming the first acoustic cavity.

In some embodiments, in the vibration direction of the quality element, a thickness of the first quality element is from 50 um to 1000 um and a thickness of the second quality element is from 10 um to 150 um.

In some embodiments, in the vibration direction of the quality element, the thickness of the first quality element is greater than the thickness of the second quality element.

In some embodiments, in a cross section obtained by the quality element in the vibration direction thereof, a connection line between an edge of the quality element on a side away from the acoustic transducer and an edge of the quality element on a side close to the acoustic transducer forms an angle with the vibration direction of the quality element, the angle being in a range of 10° to 80°.

In some embodiments, the quality element includes a first aperture portion, the first aperture portion connecting the first acoustic cavity and the second acoustic cavity.

In some embodiments, a radius of the first aperture portion is 1 um to 50 um.

In some embodiments, the housing includes a third aperture portion, the second acoustic cavity being connected to the exterior through the third aperture portion.

One embodiment of the present disclosure further provides a vibration sensor comprising: a vibration receiver including a housing and a vibration unit, the housing forming an acoustic cavity, the vibration unit being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity and a second acoustic cavity; and an acoustic transducer acoustically connected to the first acoustic cavity, wherein the housing is configured to generate a vibration based on an external vibration signal, the vibration unit changes an acoustic pressure within the first acoustic cavity in response to the vibration of the housing, causing the acoustic transducer to generate an electrical signal; the vibration unit includes a quality element and an elastic element, the elastic element is connected around the side wall of the quality element and a limiting element is provided between the elastic element and the housing.

In some embodiments, a height of the limiting element is from 100 um to 1000 um in the vibration direction of the quality element.

One embodiment of the present disclosure further provides a vibration sensor comprising a vibration receiver including a housing and a vibration unit, the housing forming an acoustic cavity, the vibration unit being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity and a second acoustic cavity; and an acoustic transducer acoustically connected to the first acoustic cavity, wherein the housing is configured to generate a vibration based on an external vibration signal, the vibration unit changes an acoustic pressure within the first acoustic cavity in response to the vibration of the housing, causing the acoustic transducer to generate an electrical signal; the vibration unit includes a quality element and an elastic element, the elastic element being connected around the side wall of the quality element, the quality element including a concave groove, the concave groove being located at a side of the quality element along the vibration direction of the quality element.

In some embodiments, the quality element includes a first aperture portion, the first aperture portion connecting the first acoustic cavity and the second acoustic cavity, the first aperture portion being located at the concave groove.

In some embodiments, a radius of the first aperture portion is 1 um to 50 um.

In some embodiments, a dimension of the concave groove is larger than a dimension of the first aperture portion.

One embodiment of the present disclosure also provides a vibration sensor comprising a vibration receiver including a housing and a vibration unit, the housing forming an acoustic cavity, the vibration unit being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity and a second acoustic cavity; and an acoustic transducer acoustically connected to the first acoustic cavity, wherein the housing is configured to generate a vibration based on an external vibration signal, the vibration unit changes an acoustic pressure within the first acoustic cavity in response to the vibration of the housing, causing the acoustic transducer to generate an electrical signal, the vibration unit includes a quality element and an elastic element, the elastic element being connected around the side wall of the quality element and extending into the housing.

In some embodiments, a thickness of the elastic element is greater than a thickness of the quality element in the vibration direction of the quality element.

In some embodiments, the quality element or the housing is provided with an aperture portion, a radius of the aperture portion being 1 um to 50 um.

DETAILED DESCRIPTION

In order to more clearly explain the technical scheme of the embodiments of this disclosure, a brief description of the accompanying drawings required for the embodiment description is given below. Obviously, the accompanying drawings below are only some examples or embodiments of this description, and it is possible for ordinary technicians skilled in the art to apply this description to other similar scenarios according to these accompanying drawings without creative effort. Unless obviously obtained from the context or the context illustrates otherwise, the same numeral in the drawings refers to the same structure or operation.

It should be understood that the “system”, “device”, “unit” and/or “module” used in this disclosure are a method used to distinguish different components, elements, parts, portions or assemblies of different levels. However, if other words may achieve the same purpose, the words may be replaced by other expressions.

The terms “first,” “second,” and similar terms used in this present disclosure and in the claims do not indicate any order, number, or importance, but are used only to distinguish the different components. Similarly, similar words such as “a”, “an”, or “one” do not indicate a limit to the number of words, but rather the existence of at least one. Unless otherwise noted, the terms “front,” “rear,” “lower,” and/or “upper” and similar terms are for illustrative purposes only and are not limited to a location or a spatial orientation. In general, the terms “comprise,” “comprises,” and/or “comprising,” “include,” “includes,” and/or “including,” merely prompt to include steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive listing. The methods or devices may also include other steps or elements.

Embodiments of this present disclosure describe a vibration sensor. In some embodiments, the vibration sensor may include a vibration receiver and an acoustic transducer. In some embodiments, the vibration receiver may include a housing and a vibration unit, the housing may form an acoustic cavity, and the vibration unit may be located in the acoustic cavity and separate the acoustic cavity into a first acoustic cavity and a second acoustic cavity. The acoustic transducer may be acoustically connected to the first acoustic cavity. The housing may be configured to generate a vibration based on an external vibration signal (e.g., a signal generated by a vibration of the user's bones, skin, etc., when he or she speaks). The vibration unit may change an acoustic pressure in the first acoustic cavity in response to the vibration of the housing, causing the acoustic transducer to generate an electrical signal.

In some embodiments, the vibration unit may include a quality element and an elastic element. An area of a side of a quality element away from the acoustic transducer is smaller than an area of the side of the quality element near the acoustic transducer. Under a same thickness condition, a contact area between the quality element and the elastic element in the embodiments of this present disclosure is increased relative to an contact area between a columnar (e.g., cylindrical or prismatic) quality element and the elastic element. When the elastic element is connected around the quality element, the connection area between the elastic element and the quality element is increased, which in turn increases the connection strength between the elastic element and the quality element and improves the stability of the structure of the vibration assembly. Further, by increasing the connection strength between the elastic element and the quality element and improving the sealing of the first acoustic cavity, the occurrence of a gap at the connection between the elastic element and the quality element can be effectively prevented such that the gas from the first acoustic cavity leaks into the second acoustic cavity can be further prevented, thereby making the acoustic pressure change in the first acoustic cavity in response to the housing vibration more sensitive, and further improving the sensitivity of the vibration sensor.

FIG.1is a diagram illustrating an exemplary framework of a vibration sensor according to some embodiments of the present disclosure. As shown inFIG.1, the vibration sensor100may include a vibration receiver110and an acoustic transducer120. In some embodiments, the vibration receiver110and the acoustic transducer120may be physically connected. The physical connection in this present disclosure may include welding, clamping, gluing, or integrated molding, or any combination thereof.

In some embodiments, the vibration sensor100may be used as a bone conduction microphone. When used as a bone conduction microphone, the vibration sensor100receives a vibration signal from the bones, skin, and other tissues generated when the user speaks and converts that vibration signal into an electrical signal containing sound information. Since capturing almost no sound (or vibration) in the air, the vibration sensor100is somewhat protected from ambient noise (e.g., the sound of others talking around, noise from vehicles driving by) and is suitable for use in a noisy environment to capture the voice signal as the user speaks. By way of example only, the noisy environment may include a noisy restaurant, a meeting place, a street, a position near a road, a fire scene, etc. In some embodiments, the vibration sensor100may be applied to a headphone (e.g., air-conduction headphones and bone-conduction headphones), a hearing aid, an assistive listening device, glasses, a headset, an augmented reality (AR) device, a virtual reality (VR) device, etc., or any combination thereof. For example, the vibration sensor100may be used as a bone conduction microphone in a headphone.

The vibration receiver110may be configured to receive and transmit the vibration signal. In some embodiments, the vibration receiver110includes a housing and a vibration unit. The housing may be an internally hollow structure, and portions of the vibration sensor100(e.g., the vibration unit) may be located within the housing. For example, the housing may form an acoustic cavity and the vibration unit may be located within the acoustic cavity. In some embodiments, the vibration unit may be located in the acoustic cavity and separate the acoustic cavity formed by the housing into a first acoustic cavity and a second acoustic cavity. The acoustic cavity may be acoustically connected to the acoustic transducer120. The acoustic connection may be a connection capable of transmitting an acoustic pressure, a sound wave or a vibration signal.

The acoustic transducer120may generate an electrical signal containing sound information based on the change in sound pressure in the first acoustic cavity. In some embodiments, the vibration signal may be received via the vibration receiver110and cause a change in air pressure inside the first acoustic cavity, and the acoustic transducer120may generate an electrical signal based on the change in the air pressure inside the first acoustic cavity. In some embodiments, when the vibration sensor100is operating, the housing may generate a vibration based on an external vibration signal (e.g., a signal generated by a vibration of the user's bones, skin, etc., when he/she speaks). The vibration unit may vibrate in response to the vibration of the housing and transmit that vibration through the first acoustic cavity to the acoustic transducer120. For example, the vibration of the vibration unit may cause a change in the volume of the first acoustic cavity, which in turn causes a change in the air pressure inside the first acoustic cavity, and converts the change in the air pressure into a change in the acoustic pressure inside the first acoustic cavity. The acoustic transducer120may detect a change in acoustic pressure in the first acoustic cavity and generate an electrical signal based on this. For example, the acoustic transducer120may include a diaphragm, and the acoustic pressure inside the first acoustic cavity changes and acts on the diaphragm, causing the diaphragm to vibrate (or deform). The acoustic transducer120converts a vibration of the diaphragm into an electrical signal. For more information about the vibration sensor100, please refer toFIG.2A-FIG.10for a detailed description.

It should be noted that the above description of the vibration sensor100and its components is for example and illustration purposes only, and does not limit the scope of application of this present disclosure. For those skilled in the art, various corrections and changes can be made to the vibration sensor100under the guidance of this present disclosure. In some embodiments, the vibration sensor100may also include other components, such as a power supply, to provide electrical power to the acoustic transducer120, etc. These amendments and changes remain within the scope of this present disclosure.

FIG.2Ais a diagram illustrating an exemplary structure of a vibration sensor according to some embodiments of the present disclosure. As shown inFIG.2A, the vibration sensor200may include a vibration receiver210and an acoustic transducer220, wherein the vibration receiver210may include a housing211and a vibration unit212.

The housing211may be an internally hollow structure, and in some embodiments, the housing211may be connected to the acoustic transducer220to enclose a structure with an acoustic cavity. The housing211and the acoustic transducer220may be physically connected to each other. In some embodiments, the vibration unit212may be located within the acoustic cavity, and the vibration unit212may separate the acoustic cavity into a first acoustic cavity213and a second acoustic cavity214. In some embodiments, the vibration unit212may form a first acoustic cavity213with the acoustic transducer220, and the vibration unit212may form a second acoustic cavity214with the housing211.

The vibration sensor200may convert an external vibration signal into an electrical signal. By way of example only, the external vibration signal may include a vibration signal when a person speaks, a vibration signal generated by the skin with the movement of the body or with the operation of other devices (e.g., speakers) in close proximity to the skin, etc., a vibration signal generated by objects or air in contact with the vibration sensor200, or any combination thereof. When the vibration sensor200works, the external vibration signal may be transmitted to the vibration unit212through the housing211, and an quality element2121of the vibration unit212is driven by an elastic element2122to vibrate in response to the vibration of the housing211. The vibration of the quality element2121may cause a volume change of the first acoustic cavity213, which in turn causes a change of air pressure inside the first acoustic cavity213, and converts the change of the air pressure inside the first acoustic cavity into a change of the acoustic pressure inside the first acoustic cavity. The acoustic transducer220may detect a change in acoustic pressure of the first acoustic cavity213and convert it to an electrical signal. For example, the acoustic transducer220may include a pickup aperture2221, and the change in acoustic pressure of the first acoustic cavity213may act on the diaphragm of the acoustic transducer220through the pickup aperture2221, causing the diaphragm to vibrate (or deform) to generate an electrical signal. Further, the electrical signal generated by the acoustic transducer220may be transmitted to an external electronic device. By way of example only, the acoustic transducer220may include an interface223. The interface may be in wired (e.g., electrically connected to) or wireless connection with an internal element (e.g., processor) of an external electronic device. The electrical signal generated by the acoustic transducer220may be transmitted to the external electronic device via the interface in a wired or wireless manner. In some embodiments, the external electronic device may include a mobile device, a wearable device, a virtual reality device, an augmented reality device, etc., or any combination thereof. In some embodiments, the mobile device may include a smartphone, a tablet, a personal digital assistant (PDA), a gaming device, a navigation device, etc., or any combination thereof. In some embodiments, the wearable device may include a smart bracelet, headphones, hearing aids, a smart helmet, a smart watch, a smart garment, a smart backpack, a smart accessory, etc., or any combination thereof. In some embodiments, the virtual reality device and/or augmented reality device may include a virtual reality headset, virtual reality glasses, a virtual reality patch, an augmented reality headset, augmented reality glasses, an augmented reality patch, etc., or any combination thereof. For example, the virtual reality device and/or augmented reality device may include Google™ Glass, Oculus Rift™, Hololens, Gear™ VR, etc.

In some embodiments, a shape of the housing211may be a regular or an irregular three-dimensional structure such as a rectangle, a cylinder, a round table, etc. In some embodiments, the material of the housing may include metal (e.g., copper, stainless steel), alloy, plastic, etc., or any combination thereof. In some embodiments, the housing may have a thickness to ensure sufficient strength to better protect the components of the vibration sensor100(e.g., the vibration unit212) set within the housing. In some embodiments, the first acoustic cavity213may be acoustically connected to the acoustic transducer220. By way of example only, the acoustic transducer220may include the pickup aperture2221, and the acoustic transducer220may be acoustically connected to the first acoustic cavity213through the pickup aperture2221. It should be noted that the description of the individual pickup aperture2221as shown inFIG.2Ais for illustrative purposes only and is not intended to limit the scope of the present disclosure. It should be understood that the vibration sensor200may include more than one pickup aperture2221. For example, the vibration sensor200may include multiple pickup apertures arranged in an array, wherein the pickup apertures may be located at any position of the acoustic transducer220corresponding to the first acoustic cavity213.

In some embodiments, the vibration unit212may include the quality element2121and the elastic element2122. In some embodiments, the quality element2121and the elastic element2122may be physically connected, e.g., glued together. By way of example only, the elastic element2122may be a material with some viscosity, bonded directly to the quality element2121.

In some embodiments, the elastic element2122may be a material that is resistant to high temperatures, allowing the elastic element2122to maintain performance during processing and manufacturing of the vibration sensor200. In some embodiments, the elastic element2122has no or very little change (e.g., within 5%) in Young's modulus and shear modulus when it is subjected to high temperate of 200° C. to 300° C., where the Young's modulus may be used to characterize the deformability of the elastic element2122when subjected to extension or compression, and the shear modulus may be used to characterize the deformability of the elastic element2122when subjected to shear. In some embodiments, the elastic element2122may be a material with good elasticity (i.e., susceptible to elastic deformation), allowing the vibration unit212to vibrate in response to the vibration of the housing211. By way of example only, the material of the elastic element2122may include a silicone rubber, a silicone gel, a silicone sealant, etc., or any combination thereof. In order to make the elastic element2122more elastic, in some embodiments, the Shore hardness of the elastic element2122may be less than 50 HA. However, according to preference for example, the Shore hardness of the elastic element2122may be less than 45 HA, 40 HA, 35 HA, 30 HA, 25 HA, 20 HA, 15 HA, 10 HA, or 5 HA.

In some embodiments, the material of the quality element2121may be a material with a density greater than a certain density threshold (e.g., 6 g/cm3), for example, a metal. By way of example only, the material of the quality element2121may include a metal or an alloy such as plumbum, copper, silver, tin, stainless steel, stainless iron, or any combination thereof. At the same quality, the higher the density of the material of the quality element2121is, the smaller the size is, so the quality element2121with a material whose density is greater than a certain density threshold can reduce the size of the vibration sensor200to some extent. In some embodiments, the material density of the quality element2121has a large effect on the resonance peak and sensitivity of the frequency response curve of the vibration sensor200. The greater the density of the quality element2121is, the greater its quality is, the more the resonance peak of the vibration sensor200shifts toward lower frequencies. By increasing the quality of the quality element2121, the sensitivity of the vibration sensor200can be improved in lower frequency bands (e.g., 20 Hz-6000 Hz) due to the lower frequency of the vibration signal (e.g., bone conduction sound). In some embodiments, the material density of the quality element2121is greater than 6 g/cm3. In some embodiments, the material density of the quality element2121is greater than 7 g/cm3. In some embodiments, the material density of the quality element2121is 7 to 20 g/cm3. According to preference for example, the material density of the quality element2121is 7 to 15 g/cm3, 7 to 10 g/cm3, or 7 to 8 g/cm3. In some embodiments, the quality element2121and the elastic element2122may be made of different materials and then assembled (e.g., glued) together to form the vibration unit212. In some embodiments, the quality element2121and the elastic element2122may also be made of the same material, forming the vibration unit212by integrated molding.

In some embodiments, the elastic element2122may be connected around the circumferential surface of the quality element2121. For example, when the quality element2121is a columnar structure (cylinder or prism), the circumferential surface of the quality element2121is the side surface of the columnar structure. As another example, when the quality element2121is a columnar structure of two different sizes (e.g., a first quality element21211and a second quality element21212), the circumferential surface of the quality element2121includes, in addition to the side surfaces of the first quality element21211and the second quality element21212, an area where the second quality element21212is not covered by the first quality element21211in a direction perpendicular to the vibration direction of the quality element2121. A side surface of the quality element2121away from the acoustic transducer220and a side surface of the quality element2121near the acoustic transducer220are approximately perpendicular to the vibration direction and are used to define the second acoustic cavity214and the first acoustic cavity213, respectively. Since the elastic element2122is connected around the circumferential surface of the quality element2121, during the vibration of the vibration unit212in the vibration direction, the momentum of the quality element2121is converted into a force on the elastic element2122, causing the elastic element2122to undergo shear deformation. Compared to extension and compression deformation, shear deformation reduces the spring coefficient of the elastic element2122, which reduces the resonant frequency of the vibration sensor200, thereby increasing the amplitude of the vibration of the quality element2121in the lower frequency range (e.g., 20 Hz-6000 Hz) during the vibration of the vibration unit212, and improving the sensitivity of the vibration sensor200. In some embodiments, the elastic element2122fits closely to the circumferential surface of the quality element2121, which can ensure the hermeticity of the first acoustic cavity213, so that the change of air pressure in the first acoustic cavity213is only related to the vibration amplitude of the vibration unit212, which can make the change of acoustic pressure in the first acoustic cavity213more obvious and effective.

In some embodiments, the elastic element2122may be a tubular structure. Accordingly, the shape of the inner wall of the elastic element2122in the tubular structure may be adapted to the shape of the circumferential surface of the quality element2121. It can be understood that, at different heights along the vibration direction, the inner wall of the elastic element2122has the same cross-sectional shape as the quality element2121. The inner wall of the elastic element2122is a side wall where the tubular structure fits against the quality element2121. For example, the quality element2121is stepped and a position where the elastic element2122is connected to the quality element2121is stepped to fit the quality element2121. In some embodiments, the shape of the cross section of the quality element2121perpendicular to its vibration direction may be triangular, quadrilateral, circular, elliptical, sector, rounded rectangular, and other regular or irregular shapes. This present disclosure does not limit the shape of the outer wall of the tubular structure of the elastic element2122. The outer wall of the elastic element2122may be a side wall that departs from the inner wall where the elastic element2122is connected to the quality element2121. For example, the shape of the outer wall of the tubular structure of the elastic element2122may include a cylindrical shape, elliptical cylindrical shape, conical shape, rounded rectangular column, rectangular column, polygonal column, irregular column, etc. or any combination thereof.

In some embodiments, the elastic element2122may extend toward and connect to the acoustic transducer220. For example, as shown inFIG.2A, an end of the elastic element2122extending toward the acoustic transducer220may be connected to the acoustic transducer220. The elastic element2122and the acoustic transducer220may be physically connected to each other, for example, by gluing, welding. In some embodiments, the elastic element2122may also be connected to the acoustic transducer220via a connection member (not shown inFIG.2A), where one end of the connection member is connected to the elastic element2122and the other end of the connection member is connected to the acoustic transducer220. In some embodiments, the elastic element2122and the housing211may be in direct contact or spaced apart. For example, as shown inFIG.2A, a distance may exist between the elastic element2122and the housing211. The distance between the elastic element2122and the housing211may be adjusted by a designer according to the size of the vibration sensor200. Compared to the direct contact between the elastic element2122and the housing211, the presence of the distance between the elastic element2122and the housing211may reduce the equivalent stiffness of the elastic element2122and increase the elasticity of the elastic element2122, thereby increasing the vibration amplitude of the quality element2121in the lower frequency range (e.g., 20 Hz-6000 Hz) during the vibration of the vibration unit212and improving the sensitivity of the vibration sensor200.

In some embodiments, the area of the side of the quality element2121that is away from the acoustic transducer220is less than the area of the side of the quality element2121that is near the acoustic transducer220. In some embodiments, the areas of the multiple cross sections of the quality element2121perpendicular to the vibration direction may all be different, for example, the quality element2121is a stepped structure. In order to increase the connection area between the elastic element2122and the circumferential surface of the quality element2121, in some embodiments, the areas of the multiple cross sections of the quality element2121perpendicular to the vibration direction is gradually increased along the side of the quality element2121away from the acoustic transducer220to the side of the quality element2121near the acoustic transducer220. In some embodiments, the areas of the multiple cross sections of the quality element2121perpendicular to the vibration direction may be partially identical, for example, the circumferential sides of the quality element2121may have a stepped structure. With a certain thickness of the quality element2121along its vibration direction, the areas of the multiple cross sections of the quality element2121perpendicular to the vibration direction are different, which can increase the circumferential surface area of the quality element2121, which in turn makes the connection area between the elastic element2122and the quality element2121increase, improves the connection strength between the elastic element2122and the quality element2121, strengthens the sealing of the first acoustic cavity, and makes the pressure change of the first acoustic cavity in response to the vibration of the housing more significant, thus improving the sensitivity of the vibration sensor.

In some embodiments, the circumferential surface of the quality element2121may be at least one level of the stepped structure.FIG.2Bis a schematic diagram illustrating a structure of the quality element2121according to some embodiments of the present disclosure. In conjunction withFIG.2AandFIG.2B, the quality element2121may include a first quality element21211and a second quality element21212. The second quality element21212is located near the acoustic transducer220, the first quality element21211is located on the side of the second quality element21212away from the second quality element21212, and a cross-sectional area of the first quality element21211vertical to the vibration direction of the quality element2121is smaller than a cross-sectional area of the second quality element21212vertical to the vibration direction of the quality element2121, so that the overall outer edge of the first quality element21211and the second quality element21212form a stepped structure. By way of exemplary illustration only, the circumferential surface of the quality element2121may include a sidewall a of the first quality element21211, a region b of the second quality element21212, and a sidewall c, with the sidewall a, region b, and sidewall c forming a stepped structure. The stepped structure may increase the area of the circumferential surface of the quality element2121, and accordingly, the area of the elastic element2122connected to the side wall of the quality element2121is larger, which is conducive to the close fitting of the quality element2121and the elastic element2122, so that there is a better sealing between the elastic element2122and the quality element2121, which is conducive to ensuring the sealing of the first acoustic cavity213. In some embodiments, the first quality element21211and the second quality element21212may be physically connected and fixed, e.g., glued (bonding by using a viscous gel such as an epoxy adhesive, silicon sealant, etc.), or may be molded in one piece. In some embodiments, the side surface of the first quality element21211near the acoustic transducer220and the side surface of the second quality element21212away from the acoustic transducer220may be physically connected and fixed.

In some embodiments, the side surface of the first quality element21211away from the acoustic transducer220is perpendicular to its vibration direction, and the side surface of the second quality element2121near the acoustic transducer220is perpendicular to its vibration direction. In some embodiments, the closer to the second quality element2121is, the larger the area of the cross-section of the first quality element21211that is perpendicular to its vibration direction, and the closer to the acoustic transducer220is, the larger the area of the cross-section of the second quality element21212that is perpendicular to its vibration direction. In some embodiments, the first quality element21211may be provided concentrically with the second quality element21212, or not concentrically with the second quality element21212. In some embodiments, the sidewall shape (i.e., a cross section perpendicular to the vibration direction) of the first quality element21211and/or the second quality element21212may include a cylindrical shape, an elliptical cylinder, a table shape, a rounded rectangular column shape (as shown inFIG.2B), a rectangular column shape, a polygonal column shape, an irregular column shape (e.g., a column with multiple stepped surfaces), etc., or any combination thereof. In some embodiments, the sidewall shapes of the first quality element21211and the second quality element21212may be the same, for example, the sidewall shapes of both the first quality element21211and the second quality element21212are formed as a rounded rectangular column shape, as shown inFIG.2B. In some embodiments, the sidewall shapes of the first quality element21211and the second quality element21212may be different, for example, the sidewall shape of the first quality element21211is formed as a cylindrical shape and the sidewall shape of the second quality element21212is formed as a rounded rectangular column shape. In some embodiments, the material of the first quality element21211and the material of the second quality element21212may or may not be the same, and by way of example only, the materials of the first quality element21211and the second quality element21212may include metals or alloys such as plumbum, copper, silver, tin, stainless steel, stainless iron, or any combination thereof. In some embodiments, the material density of the first quality element21211and the second quality element21212may be greater than 6 g/cm3. In some embodiments, the material density of the first quality element21211and the second quality element21212may be greater than 7 g/cm3.

In some embodiments, the first quality element21211is located in the middle region of the second quality element21212such that there are specific distances d (e.g., 10 um to 1000 um) between the side walls of the first quality element21211and the side walls of the second quality element21212, i.e., a specific distance d between the side edges of the first quality element21211near the acoustic transducer220and the side edges of the second quality element21212away from the acoustic transducer220. In some embodiments, the distances d between the side walls of the first quality element21211and the side walls of the second quality element21212may be equal everywhere. For example, when the first quality element21211and the second quality element21212are set concentrically, the shape of the side walls of the first quality element21211and the shape of the side walls of the second quality element21212are cylindrical structures, and the distances d between the side walls of the first quality element21211and the side walls of the second quality element21212are equal everywhere. In some embodiments, the distances d between the side walls of the first quality element21211and the side walls of the second quality element21212may not be equal everywhere. For example, the side walls of the first quality element21211are shaped as a cylindrical structure, the side walls of the second quality element21212are shaped as a rectangular column, and the distances between the edges of the side wall of the second quality element21212and the side wall of the first quality element21211are not equal. In some embodiments, the specific distances d may be 10 um to 500 um. According to preference for example, the specific distances d may be 20 um to 450 um, 30 um to 400 um, 40 um to 350 um, 50 um to 300 um, 60 um to 250 um, 70 um to 200 um, 80 um to 150 um, or 90 um to 100 um.

In some embodiments, the thickness of the first quality element21211in the vibration direction thereof may be greater than the thickness of the second quality element21212in the vibration direction thereof. By increasing the thickness of the first quality element21211, not only can the overall quality of the quality element2121be increased, but also the connection area between the elastic element2122and the side wall a in the first quality element21211can be increased, thereby improving the connection strength between the elastic element2122and the quality element2121. In some embodiments, the first quality element21211may have a thickness of 50 um to 1000 um along its vibration direction, and the second quality element21212may have a thickness of 10 um to 150 um along its vibration direction. However, according to preference for example, the first quality element21211may have a thickness of 60 um to 900 um, 20 um to 130 um, 70 um to 800 um, 30 um to 120 um, 80 um to 700 um, 40 um to 110 um, 90 um to 600 um, 50 um to 100 um, 100 um to 500 um, 60 um to 90 um, 200 um to 400 um, 60 um to 90 um, 300 um to 350 um, or 70 um to 80 um, all alternatively, along its vibration direction.

It should be noted that the quality element2122is not limited to the structure including the first quality element21211and the second quality element21212shown inFIG.2AandFIG.2B, but may also include a third quality element, a fourth quality element, or more quality elements. When the quality element2122includes more than two quality elements, a stepped structure may be formed between the sidewalls of each two quality elements.

In some embodiments, the elastic element2122may include a first elastic portion21221and a second elastic portion21222, the first elastic portion21221is connected around a side wall of the first quality element21211and the second elastic portion21222is connected around a side wall of the second quality element21212. The first elastic portion21221and the second elastic portion21222may be physically connected, e.g., glued, welded. In some embodiments, the first elastic portion21221and the second elastic portion21222may be of one-piece molded structure. In some embodiments, the first elastic portion21221fits closely against the side wall of the first quality element21211, the second elastic portion21222fits closely against the side wall of the second quality element21212, and the first elastic portion21221is hermetically connected to the second elastic portion21222. In some embodiments, the two ends of the first elastic portion21221may be connected to the second elastic portion21222and the side wall of the first quality element21211and, respectively. In some embodiments, the two ends of the first elastic portion21221may be hermetically connected to the second elastic portion21222and the side wall of the first quality element21211, respectively. The first elastic portion21221may include a first side surface21221aand a second side surface21221b, the first side surface21221ais connected to a side wall of the first quality element21211and the second side surface21221bis connected to a surface on the second quality element21212that is exposed to the second acoustic cavity214. The second side surface21221bof the first elastic portion21221may be connected to a step surface of the second quality element21212, and the step surface of the second quality element21212has a supporting effect on the first elastic portion21221. The second side surface21221bof the first elastic portion21221may be connected to the second elastic portion21222. The side wall of the second quality element21212is connected to the second elastic portion21222. In some embodiments, the second elastic portion21222extends toward and is connected to the acoustic transducer220(e.g., substrate222). In some embodiments, the two ends of the second elastic portion21222may be connected to the side wall of the second quality element21212, the acoustic transducer220, respectively. One end of the second elastic portion21222connected to the side wall of the second quality element21212may also be connected to the first elastic portion21221. In some embodiments, the shape of the first side surface21221aof the first elastic portion21221is adapted to the shape of the side wall of the first quality element21211. For example, the shape of the cross section of the first quality element21211perpendicular to its vibration direction may be triangular, quadrilateral, circular, elliptical, scalloped, rounded rectangular, and other regular or irregular shapes, and at each height along the vibration direction of the first quality element21211, the shape of the cross section of the first side surface21221aperpendicular to the vibration direction of the first quality element21211is the same as the shape of the cross section of the first quality element21211. In some embodiments, the shape of the side wall of the second elastic portion21222near the side wall of the second quality element21212is adapted to the shape of the side wall of the second quality element21212. For example, the cross-sectional shape of the second quality element21212perpendicular to its vibration direction may be triangular, quadrilateral, circular, elliptical, scalloped, rounded rectangular, and other regular or irregular shapes, at each height of the vibration direction, the second elastic portion21222near the side wall of the second quality element21212has the same cross-sectional shape as the cross-sectional shape of the side wall of the second quality element21212perpendicular to the vibration direction. This present disclosure does not limit the side shape of the first elastic portion21221away from the side wall of the first quality element21211and the side shape of the second elastic portion21222away from the side wall of the second quality element21212, for example, their side shapes may include cylindrical, elliptical cylindrical, conical, rounded rectangular column, rectangular column, polygonal column, irregular column shape, or any combination thereof. In some embodiments, the materials of the first elastic portion21221and the second elastic portion21222may be the same or different. By way of example only, the materials of the first elastic portion21221or the second elastic portion21222may include silicone rubber, silicone gel, silicone sealant, etc., or any combination thereof.

In some embodiments, the quality element2121may also include a first aperture portion21213, and the first aperture portion21213connects the first acoustic cavity213and the second acoustic cavity214. The first aperture portion21213may penetrate the quality element2121, and the first aperture portion21213may allow gas flow within the first acoustic cavity213and the second acoustic cavity214, thereby balancing the change in air pressure inside the first acoustic cavity213and the second acoustic cavity214due to temperature changes during the preparation of the vibration sensor200(e.g., during reflow soldering) and reducing or preventing damage to the components of the vibration sensor200caused by such change in air pressure, e.g., cracking, deformation, etc.

In some embodiments, the first aperture portion21213may be a single aperture structure. In some embodiments, a diameter of this single aperture may be 1-50 um. However, according to preference for example, the diameter of the single aperture may be 2-45 um, 3-40 um, 4-35 um, 5-30 um, 5-25 um, 5-20 um, 6-15 um, or 7-10 um. In some embodiments, the first aperture portion21213may be an array of a certain number of micro-apertures. By way of example only, the number of micro-apertures may be 2-10. In some embodiments, the diameter of each micro-aperture may be 0.1-25 um. However, according to preference for example, the diameter of each micro-aperture may be 0.5-20 um, 0.5-25 um, 0.5-20 um, 0.5-15 um, 0.5-10 um, 0.5-5 um, 0.5-4 um, 0.5-3 um, 0.5-2 um, or 0.5-1 um.

In some embodiments, the quality element2121may be provided without the first aperture portion21213. In some embodiments, when the quality element2121is not provided with the first aperture portion21213, damage to the components of the vibration sensor200due to changes in air pressure inside the first acoustic cavity213can be avoided by increasing the connection strength between the quality element2121and the elastic element2122(e.g., by enhancing the bonding strength of the glue between the quality element2121and the elastic element2122).

In some embodiments, the acoustic transducer220may include a substrate222. The substrate222may be used to hold and/or support the vibration receiver210. In some embodiments, the substrate222may be provided on the acoustic transducer220, and the housing211is physically connected to the substrate222to enclose the acoustic cavity. In some embodiments, one end of the elastic element2122extending toward the acoustic transducer220may be connected to the substrate222, which may be used to hold and support the vibration unit212. The substrate222is provided so that the vibration receiver210can be processed, manufactured and sold as a separate component. The vibration receiver210with the substrate222may be physically connected (e.g., glued) directly to the acoustic transducer220to obtain the vibration sensor200, which simplifies the production process of the vibration sensor200and increases the process flexibility for producing the vibration sensor200. In some embodiments, the thickness of the substrate222may be 10 um to 300 um. According to preference for example, the thickness of the substrate222may be 20 um to 280 um, 30 um to 270 um, 40 um to 250 um, or 80 um to 90 um. In some embodiments, the material of the substrate222may include a metal (e.g., iron, copper, stainless steel, etc.), an alloy, a non-metal (plastic, rubber, resin), etc., or any combination thereof.

In some embodiments, the pickup aperture2221may be located on the substrate222, with the pickup aperture2221passing through the substrate222in the vibration direction. The change in acoustic pressure within the first acoustic cavity213may act on the acoustic transducer220through the pickup aperture2221to generate an electrical signal.

It should be noted that the above description of the vibration sensor200and its components is for example and illustration purposes only, and does not limit the scope of application of this present disclosure. For the person skilled in the art, various modifications and changes can be made to the vibration sensor200under the guidance of this present disclosure, for example, the vibration sensor200may include at least one first aperture21213, and the first aperture21213may be provided through the elastic element2122. These amendments and changes remain within the scope of this present disclosure.

In order to ensure that the elastic element and the quality element have a large connection area, and thus improve the connection strength between the elastic element and the quality element, the quality element meeting the condition that the area of the side of the quality element away from the acoustic transducer is less than the area of the side of the quality element near the acoustic transducer may also be other structures.FIG.3is a schematic diagram illustrating a structure of the vibration unit312according to some embodiments of the present disclosure. As shown inFIG.3, the area of the side of the quality element3121away from the acoustic transducer is smaller than the area of the side of the quality element3121near the acoustic transducer, and in the cross section of the quality element3121along its vibration direction (as shown inFIG.3), a side surface connecting an edge of the side of the quality element3121away from the acoustic transducer and an edge of the side of the quality element3121near the acoustic transducer is an inclined surface. Connecting the elastic element3122to the inclined surface ensures that the elastic element3122and the quality element3121have a large connection area, which in turn improves the connection strength between the elastic element3122and the quality element3121.

In some embodiments, the side surface connecting the side of the quality element3121that is away from the acoustic transducer and the side of the quality element3121that is close to the acoustic transducer may be a smooth inclined surface. In some embodiments, the side surface connecting the side of the quality element3121away from the acoustic transducer and the side of the quality element3121near the acoustic transducer may be an inclined surface having multiple concaves and convex, for example, the inclined surface may be a wavy or serrated structure. In some embodiments, in the cross section of the quality element3121along its vibration direction, the connection line between the edge of the side of the quality element3121away from the acoustic transducer and the edge of the side of the quality element3121near the acoustic transducer forms an angle with the vibration direction of the quality element3121, the angle c may be 10°-80°. The set range of this angle c may avoid that when the angle c is too small, the optimization of the connection strength between the elastic element3122and the quality element3121is not obvious, and when the angle c is too large, the area of the quality element3121away from the side of the acoustic transducer is too small, causing the mass of the quality element3121to be too small. According to preference for example, the angle c may be 20°-70°, 30°-60°, 40°-50°, 42°-48°, or 44°-46°.

In some embodiments, the elastic element3122is connected around the side surface connecting the side of the quality element3121that is away from the acoustic transducer and the side of the quality element3121that is near the acoustic transducer. In some embodiments, one end of the elastic element3122is connected to the inclined surface of the quality element3121and the other end of the elastic element3122is connected to the acoustic transducer. A first acoustic cavity313is formed among a side of the quality element3121near the acoustic transducer, the elastic element3122and the acoustic transducer. In some embodiments, the shape of the end face of the elastic element3122connected to the inclined surface of the quality element3121is adapted to the shape of the inclined surface of the quality element3121. For example, the edge of the side surface is a wavy or serrated curve, and the outer edge of the end face of the elastic element3122connected to the articulated side is also a wavy or serrated curve. The present disclosure does not limit the shape of one side of the elastic element3122exposed to the second acoustic cavity; for example, the edge of the side of the elastic element3122exposed to the second acoustic cavity in the cross section of the quality element3121along its vibration direction may be an irregular curve with multiple concaves and convex.

In some embodiments, the quality element3121may also include a first aperture portion31213that penetrates the quality element3121to allow for gas flow within the first acoustic cavity313and the second acoustic cavity. In some embodiments, the first aperture portion31213may be a single aperture structure. In some embodiments, the first aperture portion31213may be an array of a certain number of micro-apertures. By way of example only, the number of micro-apertures may be from 2 to 10.

In some embodiments, a substrate322may be used to hold and/or support the vibration unit312. In some embodiments, one end of the elastic element3122connected to the acoustic transducer may be connected to the substrate322such that the substrate322may be used to hold and support the vibration unit312. In some embodiments, the substrate322may include a pickup aperture2221for acoustically connecting the first acoustic cavity313to the acoustic transducer.

It should be noted that the above description of the vibration unit312and its components is for example and illustration purposes only, and does not limit the scope of application of this present disclosure. For those skilled in the art, various modifications and changes can be made to the vibration unit312under the guidance of this present disclosure, for example, the vibration sensor200may include at least two elastic elements. The elastic element is connected to the elastic element, the elastic element near the quality element is connected to the quality element, and the quality element near the acoustic transducer is connected to the acoustic transducer. These amendments and changes remain within the scope of this present disclosure.

The opening of the first aperture portion on the quality element may damage some of the components of the acoustic transducer (e.g., the substrate). To prevent the opening of the first aperture portion from damaging the acoustic transducer, in some embodiments, the quality element may include one or more second aperture portions (also referred to as concave grooves) with the first aperture portion connected to the second aperture portion(s).FIG.4is a schematic diagram illustrating a structure of the vibration unit412according to some embodiments of the present disclosure. As shown inFIG.4, two ends of an elastic element4122are physically connected to a side wall of a quality element4121, the acoustic transducer, respectively, such as glued connection, and a first acoustic cavity413is formed among a side surface of the quality element4121near the acoustic transducer, the elastic element4122, and the acoustic transducer.

In the case where the quality element4121needs to have a first aperture portion41213, it is not easy to machine the first aperture portion41213due to the large overall thickness of the quality element4121along its vibration direction. In some embodiments, a second aperture portion41214may be provided on the quality element4121, and the first aperture portion41213is connected to the second aperture portion41214. In some embodiments, the quality element4121may include one or more second aperture portions41214. The second aperture portion41214is provided so that the local structure of the quality element4121is thinned to facilitate the opening of the first aperture portion41213at the thinned local structure, and to facilitate the control of the force of machining the first aperture portion41213so that no damage is caused to other components of the vibration sensor (e.g., substrate422, acoustic transducer) during the machining of the first aperture portion41213. In some embodiments, the second aperture portion41214is located at the side of the quality element4121along its vibration direction. For example, the second aperture portion41214may be located on the side of the quality element4121near or away from the substrate422. In some embodiments, the first aperture portion41213and the second aperture portion41214are provided along the vibration direction of the quality element4121, wherein the first aperture portion41213and the second aperture portion41214penetrate the quality element4121. In some embodiments, the second aperture portion41214may or may not be provided concentrically with the quality element4121. In some embodiments, the first aperture portion41213may or may not be provided concentrically with the second aperture portion41214.

In some embodiments, the second aperture portion41214and/or the first aperture portion41213may be a square aperture, a polygonal aperture, a round aperture, an irregular aperture, etc., or any combination thereof, and the present disclosure does not limit the aperture shape of the second aperture portion41214and the first aperture portion41213. In some embodiments, the first aperture portion41213may or may not have the same aperture shape as the second aperture portion41214. In some embodiments, the first aperture portion41213, and the second aperture portion41214may both be single aperture structures. In some embodiments, the second aperture portion41214may be a single aperture structure and the first aperture portion31213may be an array of a certain number of micro apertures.

In some embodiments, the size of the second aperture portion41214is larger than the size of the first aperture portion41213, facilitating the machining of the first aperture portion41213within the second aperture portion41214. In some embodiments, the cross-sectional area of the second aperture portion41214perpendicular to the vibration direction of the quality element4121is greater than the cross-sectional area of the first aperture portion41213perpendicular to the vibration direction of the quality element4121. When both the second aperture portion41214and the first aperture portion41213are round holes, the aperture diameter of the second aperture portion41214may be 100 um to 1600 um and the aperture diameter of the first aperture portion41213may be 1 um to 50 um. As a preference, the aperture diameter of the second aperture portion4121may be 110 um to 1400 um and the aperture diameter of the first aperture portion41213may be 2 um to 45 um. As another preference, the aperture diameter of the second aperture portion41214may be 120 um to 1200 um and the aperture diameter of the first aperture portion41213may be 3 um to 40 um. As another preference, the aperture diameter of the second aperture portion41214may be 130 um to 1000 um and the aperture diameter of the first aperture portion41213may be 4 um to 35 um. As another preference, the aperture diameter of the second aperture portion41214may be 140 um to 800 um and the aperture diameter of the first aperture portion41213may be 5 um to 30 um. As another preference, the aperture diameter of the second aperture portion41214may be 160 um to 600 um and the aperture diameter of the first aperture portion41213may be 5 um to 25 um. As another preference, the aperture diameter of the second aperture portion41214may be 180 um to 500 um and the aperture diameter of the first aperture portion41213may be 5 um to 20 um. As another preference, the aperture diameter of the second aperture portion41214may be 200 um to 400 um and the aperture diameter of the first aperture portion41213may be 10 um to 15 um.

FIG.5is a schematic diagram illustrating a structure of the quality element4121shown inFIG.4. The second aperture portion41214is provided on the side of the quality element4121near the acoustic transducer, and the first aperture portion41213is provided on the side of the quality element4121away from the acoustic transducer. The second aperture portion41214and the first aperture portion41213pass through the quality element4121.

FIG.6Ais a schematic diagram illustrating a structure of the vibration unit412according to some embodiments of the present disclosure. As shown inFIG.6A, the second aperture portion41214may also be located on the side of the quality element4121that is away from the acoustic transducer, and the first aperture portion41213is provided on the side of the quality element4121near the acoustic transducer, with the second aperture portion41214and the first aperture portion41213passing through the quality element4121. In some embodiments, the depth of the first aperture portion41213along the vibration direction of the quality element4121may be greater than, less than, or equal to the depth of the second aperture portion41214along the vibration direction of the quality element4121. By way of example only,FIG.6Bis a schematic diagram illustrating a structure of the vibration unit412according to some embodiments of the present disclosure. As shown inFIG.6B, the second aperture portion41214is located on the side of the quality element4121away from the acoustic transducer, the first aperture portion41213is located on the side of the quality element4121near the acoustic transducer, with the second aperture portion41214and the first aperture portion41213passing through the quality element4121. The depth of the first aperture portion41213along the vibration direction of the quality element4121is greater than the depth of the second aperture portion41214along the vibration direction of the quality element4121.FIG.6Cis a schematic diagram illustrating a structure of the vibration unit412according to some embodiments of the present disclosure. As shown inFIG.6C, in some embodiments, the quality element4121is provided with second aperture portions41214on both sides near, and away from, the acoustic transducer, and the second aperture portions41214on both sides of the quality element4121are connected through the first aperture portion41213. In some embodiments, the vibration unit412may include multiple layers of stacked quality elements4121. The materials of the multiple layers of quality elements4121may be the same, not identical, or not identical at all. The first aperture portion41213passes through some of the quality elements4121, the second aperture portions41214pass through some of the quality elements4121, and the first aperture portion41213is connected to the second aperture portions41214. By way of example only,FIG.6Dis a schematic diagram illustrating a structure of the vibration unit412according to some embodiments of the present disclosure. As shown inFIG.6D, the vibration unit412may include two layers of stacked quality elements4121. The two layers of the quality elements4121have different materials, the first aperture portion41213passes through the quality element4121that is away from the acoustic transducer and the second aperture portion41214passes through the close quality element4121, and the first aperture portion41213is connected to the second aperture portion41214.

It should be noted that the above description of the vibration unit412and its components is for example and illustration purposes only, and does not limit the scope of application of this present disclosure. For those skilled in the art, various corrections and changes can be made to the vibration unit412under the guidance of this present disclosure, for example, the second aperture portion41214and the first aperture portion41213can be provided through the side wall of the quality element4121. These amendments and changes remain within the scope of this present disclosure. It should be noted that the second aperture portion41214shown inFIGS.4-FIG.6Dcan also be applied in the vibration sensor200shown inFIG.2A. In addition, the quality element4121ofFIGS.4-FIG.6Dis illustrated only as an example, and its specific shape and structure can be referred to the contents ofFIGS.2A and2B, and will not be further described herein.

In some embodiments, when the elastic element is in a semi-fluid state during processing, or when the elastic element deforms during a high-temperature process, the size of the elastic element is not easily controlled, resulting in it occupying a large acoustic cavity space. In some embodiments, the vibration sensor may further include a limiting member, and the limiting member is located between the elastic element and the housing to limit the flow track of the elastic element in the high temperature state, thereby facilitating the control of the size of the elastic element.FIG.7is a schematic diagram illustrating a structure of the vibration sensor500according to some embodiments of the present disclosure. As shown inFIG.7, the vibration sensor500includes a vibration receiver510, an acoustic transducer520, and a limiting member530. The vibration receiver510may include a housing511and a vibration unit512. The housing511may be connected to the acoustic transducer520to enclose an encapsulated structure with an acoustic cavity. The vibration unit512may be located within the acoustic cavity. The vibration unit512may separate the acoustic cavity into a first acoustic cavity513and a second acoustic cavity514. The vibration unit512may include a quality element5121and an elastic element5122. The elastic element5122may be connected around the side wall of the quality element5121, extend toward the acoustic transducer520, and directly connected to the substrate522. The substrate522is provided on the acoustic transducer520, and the vibration receiver510may be provided on the substrate522. The structure and components of the vibration sensor500are the same or similar to the structure and components of the vibration sensor200depicted inFIG.2A. More description about the structure and components of the vibration sensor500can be found inFIG.2Aand description thereof, which is not repeated herein.

In some embodiments, the limiting member530is located between the elastic element5122and the housing511. The limiting member530acts as a restriction on an outer wall of the elastic element5122to control the flow of the elastic element5122during the preparation of the vibration receiver510, thereby better controlling the size and shape of the elastic element5122.

In some embodiments, the limiting member530may be provided around the elastic element5122. The side of the elastic element5122near the quality element5121is physically connected to the quality element5121, and the side of the elastic element5122near the limiting member53is physically connected to the limiting member53. In some embodiments, the limiting member530may be physically connected to the substrate522. In some embodiments, the limiting member530may be, or not be in contact with the housing511.

In some embodiments, the height of the limiting member530along the vibration direction of the quality element5121may be 100 um to 1000 um. As a preference, the height of the limiting member530along the vibration direction of the quality element5121may be 110 um to 900 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 120 um to 800 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 130 um to 700 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 140 um to 600 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 150 um to 500 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 160 um to 400 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 170 um to 300 um. As another preference, the height of the limiting member530along the vibration direction of the quality element5121may be 180 um to 200 um. And even more so preferably, the height of the limiting member530along the vibration direction of the quality element5121is equal to the height of the quality element5121. This present disclosure does not limit the material and/density of the limiting member530, for example, the limiting member530may be made of a non-permeable metal material.

In some embodiments, at least one third aperture portion5111may be provided in the housing511and pass through the housing511. The structure of the third aperture portion5111is the same or similar to the structure of the first aperture portion21213, as can be described inFIG.2A, and will not be repeated here. The third aperture portion5111may allow the second acoustic cavity514to circulate with the outside gas, thereby balancing the change in air pressure inside the second acoustic cavity514caused by temperature changes during the preparation of the vibration sensor500(e.g., during reflow soldering), and reducing or preventing damage to the components of the vibration sensor500caused by that change in air pressure, e.g., cracking, deformation, etc. In addition, the third aperture portion5111may be used to reduce the damping generated by the gas inside the second acoustic cavity514when the quality element5121vibrates.

In some embodiments, the air conduction sound in the environment may affect the performance of the vibration sensor500in use. To reduce the effect of the air conduction sound in the environment, the third aperture portion5111on the housing511may be sealed by using a sealing material after the preparation of the vibration sensor500is completed, e.g., after reflow soldering. By way of example only, the sealing material may include epoxy adhesive, silicone sealant, etc., or any combination thereof. In some embodiments, the housing511may also be provided without the third aperture portion5111.

It should be noted that the above description ofFIG.7regarding the vibration sensor500and its components is for example and illustration purposes only and does not limit the scope of application of this present disclosure. For those skilled in the art, various corrections and changes can be made to the vibration sensor500under the guidance of this present disclosure. For example, the housing511may be in contact (e.g., physically connected) or indirect connect with the acoustic transducer520. These amendments and changes remain within the scope of this present disclosure. It should be noted that the limiting member530shown inFIG.7can also be applied to the vibration sensor shown inFIG.2A-FIG.6D. In addition, the quality element5121ofFIG.7is illustrated only as an example, and its specific shape and structure can be referred to the contents ofFIGS.2A-FIG.6D, which will not be further described here.

FIG.8is a schematic diagram illustrating a structure of the vibration sensor600according to some embodiments of the present disclosure. As shown inFIG.8, the vibration sensor600includes a vibration receiver610and an acoustic transducer620. The vibration receiver610may include a housing611and a vibration unit612. The housing611may be connected to the acoustic transducer620to enclose an encapsulated structure with an acoustic cavity, the vibration unit612may be located within the acoustic cavity, and the vibration unit612may separate the acoustic cavity into a first acoustic cavity613and a second acoustic cavity614. The vibration unit612may include a quality element6121and an elastic element6122, with the quality element6121being connected to the housing611via the elastic element6122. The structure and components of the vibration sensor600are the same or similar to the structure and components of the vibration sensor200depicted inFIG.2A, as can be seen inFIG.2A, and will not be repeated herein.

In some embodiments, the elastic element6122is snapped to the outer side of the quality element6121, wherein the inner side of the elastic element6122is physically connected to the quality element6121and the outer side of the elastic element6122is physically connected to the housing611. In some embodiments, the elastic element6122and the substrate622are at a certain distance in the vibration direction of the quality element6121, wherein the elastic element6122, the quality element6121, the housing611and the substrate622form a first acoustic cavity613; the elastic element6122, the quality element6121and the housing611form a second acoustic cavity614. When forming the first acoustic cavity613and the second acoustic cavity614, the height of the quality element6121may be controlled by means of a jig (not shown inFIG.8), for example, by placing the quality element6121on the jig, lifting the quality element6121by using the height of the jig itself, and then connecting the quality element6121to the housing611via the elastic element6122. By achieving height control of the quality element6121, the height of the first acoustic cavity613and the second acoustic cavity614can be controlled more stably. In some embodiments, the thickness of the elastic element6122along the vibration direction of the quality element6121is equal to the thickness of the quality element6121. In some embodiments, the thickness of the elastic element6122along the vibration direction of the quality element6121is less than or greater than the thickness of the quality element6121.

FIG.9is a schematic diagram illustrating a structure of the vibration transceiver610according to some embodiments of the present disclosure. As shown inFIG.9, in some embodiments, the thickness of the elastic element6122along the vibration direction of the quality element6121is greater than the thickness of the quality element6121, wherein the sides of the elastic element6122along the vibration direction of the quality element6121may protrude relative to the sides of the quality element6121so as to increase the connection area between the elastic element6122and the quality element6121, thereby increasing the strength of the connection between the two.

In some embodiments, the quality element6121may be provided with an aperture portion630. The aperture portion630may penetrate the quality element6121to connect the first acoustic cavity613and the second acoustic cavity614, thereby balancing the change in air pressure inside the first acoustic cavity613and the second acoustic cavity614due to temperature changes during the preparation of the vibration sensor600(e.g., during reflow soldering), reducing or preventing damage to the components of the vibration sensor200caused by such air pressure changes, e.g., cracking, deformation, etc. In some embodiments, the housing611may be provided with an aperture portion630, and the aperture portion630may pass through the housing611to connect the second acoustic cavity614to the exterior. The aperture portion630may be used to reduce the damping generated by the gas inside the second acoustic cavity614when the quality element6121vibrates. The shape and structure of the aperture portion630may be referred to the relevant descriptions of the first aperture portion, the second aperture portion, and the third aperture portion elsewhere in the embodiments of the present disclosure, such asFIG.2Aand its related contents.

It should be noted that the descriptions ofFIGS.8and9above with respect to the vibration sensor600and its components are for example and illustration purposes only, and do not limit the scope of application of this present disclosure. For those skilled in the art, various corrections and changes can be made to the vibration sensor600under the guidance of this present disclosure. For example, neither the housing611nor the quality element6121is provided with the aperture portion630, or both the housing611and the quality element6121are provided with the aperture portion630. These amendments and changes remain within the scope of this present disclosure.

The basic concept has been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example, and does not constitute a limitation to the present disclosure. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and amendments to the present disclosure. These alterations, improvements, and modifications are intended to be suggested by this disclosure, and are within the spirit and scope of the exemplary embodiments of this disclosure.

Moreover, certain terminology has been used to describe embodiments of the present disclosure. Such as “one embodiment,” “an embodiment,” and/or “some embodiments” means a certain feature, structure, or characteristic associated with at least one embodiment of the present disclosure. Therefore, it should be emphasized and noted that two or more references to “an embodiment” or “one embodiment” or “an alternative embodiment” in various places in this specification are not necessarily referring to the same embodiment. In addition, some features, structures, or features in the present disclosure of one or more embodiments may be appropriately combined.

Furthermore, those skilled in the art will appreciate that aspects of this application may be illustrated and described in several patentable categories or situations, including any new and useful process, machine, product, or combination of matter, or combinations of them. of any new and useful improvements. Accordingly, all aspects of the present disclosure may be performed entirely by hardware, may be performed entirely by software (including firmware, resident software, microcode, etc.), or may be performed by a combination of hardware and software. The above hardware or software can be referred to as “data block”, “module”, “engine”, “unit”, “component” or “system”. In addition, aspects of the present disclosure may appear as a computer product located in one or more computer-readable media, the product including computer-readable program code.

A computer storage medium may contain a propagated data signal with the computer program code embodied therein, for example, on baseband or as part of a carrier wave. The propagating signal may take a variety of manifestations, including electromagnetic, optical, etc., or a suitable combination. Computer storage media can be any computer-readable media other than computer-readable storage media that can communicate, propagate, or transmit a program for use by coupling to an instruction execution system, apparatus, or device. Program code on a computer storage medium may be transmitted over any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or a combination of any of the foregoing.

The computer program coding required for the operation of the various parts of this application may be written in any one or more programming languages, including object-oriented programming languages such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C #, VB.NET, Python etc., conventional procedural programming languages such as C language, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages such as Python, Ruby and Groovy, or other programming languages, etc. The program code may run entirely on the user's computer, or as a stand-alone software package on the user's computer, or partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the latter case, the remote computer may be connected to the user's computer through any network, such as a local area network (LAN) or wide area network (WAN), or to an external computer (e.g., through the Internet), or in a cloud computing environment, or as a service Use e.g., software as a service (SaaS).

Furthermore, unless explicitly stated in the claims, the order of processing elements and sequences described in the present disclosure, the use of numbers and letters, or the use of other names are not intended to limit the order of the procedures and methods of the present disclosure. Although the above disclosure discusses through various examples what is currently considered to be a variety of useful embodiments of the disclosure, it is to be understood that such detail is solely for that purpose, and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover modifications and equivalent arrangements that are within the spirit and scope of the disclosed embodiments. For example, although the implementation of various components described above may be embodied in a hardware device, it may also be implemented as a software only solution, e.g., an installation on an existing server or mobile device.

Some examples use numbers to describe quantities of ingredients and attributes, it should be understood that such numbers used to describe the examples, in some examples, use the modifiers “about”, “approximately” or “substantially” to retouch. Unless stated otherwise, “about”, “approximately” or “substantially” means that a variation of ±20% is allowed for the stated number. Accordingly, in some embodiments, the numerical parameters set forth in the specification and claims are approximations that can vary depending upon the desired characteristics of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and use a general digit reservation method. Notwithstanding that the numerical fields and parameters used in some embodiments of the present disclosure to confirm the breadth of their ranges are approximations, in particular embodiments such numerical values are set as precisely as practicable.

Each patent, patent application, patent application publication, and other material, such as article, book, specification, publication, document, etc., cited in this application is hereby incorporated by reference in its entirety. Application history documents that are inconsistent with or conflict with the contents of this application are excluded, as are documents (currently or hereafter appended to this application) that limit the broadest scope of the claims of this application. It should be noted that, if there is any inconsistency or conflict between the descriptions, definitions and/or terms used in the attached materials of this application and the content of this application, the descriptions, definitions and/or terms used in this application shall prevail.

At last, it should be understood that the embodiments described in the present disclosure are merely illustrative of the principles of the embodiments of the present disclosure. Other modifications that may be employed may be within the scope of the present disclosure. Thus, by way of example, but not of limitation, alternative configurations of the embodiments of the present disclosure may be utilized in accordance with the teachings herein. Accordingly, embodiments of the present disclosure are not limited to that precisely as shown and described.