CN115278418A - Acoustic damping device, assembly process thereof and audio equipment - Google Patents

Abstract

The invention provides an acoustic damping device, an assembling process thereof and audio equipment. The acoustic damping device comprises a shell, a damping mechanism and a loudspeaker; the damping mechanism comprises a buffer piece, a first mounting plate and a second mounting plate; the central plane of the damping mechanism is provided with a first mounting hole, the peripheral edge of the damping mechanism is provided with a second mounting hole, the buffer piece comprises a buffer part which surrounds the edge of the first mounting hole to form concave and convex, and the buffer part is used for absorbing the vibration energy of the loudspeaker and preventing the vibration energy of the loudspeaker from being transmitted to the shell, the pickup of an external microphone or the inherent frequency of other external equipment; the distance between the first connecting part and the loudspeaker is adjusted, and the concave-convex curvature of the buffer part is adjusted to adjust the vibration energy transferred by the loudspeaker. The technical scheme of the invention ensures that the loudspeaker is independent of the shell, greatly prevents the vibration energy of the loudspeaker from being transmitted to the shell and being far away from the natural frequency of the surrounding devices, and absorbs most of the kinetic energy through the buffer part so as to achieve acoustic shock absorption and noise avoidance and endow the equipment with better tone quality.

Description

Acoustic damping device and its assembly process, audio equipment

technical field

The invention relates to the technical field of loudspeaker boxes, in particular to an acoustic damping device, an assembly process thereof, and audio equipment.

Background technique

With the rapid development and iteration of smart technology, smart office, smart home and other devices are becoming more and more indispensable, and its voice interaction is an important performance to realize remote information transmission and device terminal control. People's performance requirements for voice interactive devices are also getting higher and higher, and the voice recognition and processing of intelligent audio products also rely on a good acoustic system. A good acoustic system should have no energy interference from speakers and microphones, and provide a noise-free environment for speech recognition without vibration and noise. Therefore, doing a good job of acoustic shock absorption is to determine the restoration of high-quality sound sources and to achieve better voice interaction during multi-speaking.

Based on a good sound quality audio equipment, the speaker is usually set in a closed box, and the speaker fastened to the box will release huge vibration energy under high power, causing the box to resonate with the surrounding devices to generate noise, thus affecting the sound source Distortion affects the sound quality interaction of speakers and microphones working at the same time. At present, most of the technology uses soft silica gel and foam for shock absorption, and its elastic thickness alone can slow down the vibration energy. physically. Since the fastening bracket of the speaker unit is clamped on the box body through the sandwich of the shock-absorbing buffer body, the fastening method becomes very tight, changing from a soft elastic body to a hard contact body, which greatly weakens the performance of the shock-absorbing buffer body. Elastic deformation; make the fastening bracket and the shock-absorbing buffer body have direct or indirect energy transmission with the box body on a large area. Especially under high power, the vibration energy on the speaker unit is transmitted to the surroundings of the box through the hard contact body, and this shock-absorbing buffer body without elastic deformation transmits most of the vibration energy. This method has been shown in the test For unfavorable effects such as noise and tail, please refer to Figure 1(a). The huge vibration kinetic energy of the speaker itself is transmitted to the box and the natural frequency is amplified through other mechanisms. Thereby cause the damping mode effect to be still unsatisfactory.

In view of this, in order to solve the shortcomings in the prior art, the patent of the present invention provides an acoustic damping mechanism for intelligent voice interaction equipment, which can absorb and slow down the vibration in essence, and avoid most of the vibration energy from being transmitted to the surroundings of the box And the pickup of the microphone, at the same time, when the speaker and the microphone are under the same device and work together to achieve better voice interaction and improved sound quality.

Contents of the invention

The main purpose of the present invention is to provide an acoustic damping device, its assembly process, and audio equipment, aiming to solve the technical problem of the unsatisfactory damping effect of the acoustic device in the prior art.

In order to achieve the above object, the present invention proposes an acoustic damping device, which includes a housing, a damping mechanism and a horn, wherein the damping mechanism includes a buffer, a first mounting plate and a second mounting plate. Mounting plate; the central surface of the shock absorbing mechanism has a first mounting hole, and the peripheral edge of the shock absorbing mechanism has a second mounting hole, and the buffer member includes a concave-convex buffer formed around the edge of the first mounting hole part, the buffer part extends to the side of the first mounting hole with a first connecting part connected to the first mounting plate, the first connecting part is connected to the horn, and the buffer part faces away from the A second connecting portion connected to the second mounting plate extends from one side of the first mounting hole, and the second connecting portion is connected to the housing;

Wherein, the first mounting plate and the first connecting portion are integrally formed or detachably connected, and the second mounting plate and the second connecting portion are integrally formed or detachably connected;

The buffer part is used to absorb the vibration energy of the speaker and prevent the vibration energy of the speaker from being transmitted to the natural frequency of the shell, the sound pickup of the external microphone or other external devices; wherein, the adjustment between the first connecting part and The distance between the horns and the concave-convex curvature of the buffer are adjusted to adjust the vibration energy transmitted by the horns.

Optionally, the shock-absorbing mechanism is one of circular, square, special-shaped or three-dimensional; the buffer is one of peak-valley, wavy, ring-shaped, and m-shaped; wherein , the buffer mechanism is assembled on the housing in a forward direction or assembled in a reverse direction on the housing.

Optionally, one or more of the first mounting plate, the second mounting plate and the buffer portion are made of elastic material, wherein the first mounting plate, the second mounting plate The material is the same as or different from that of the cushioning portion.

Optionally, the hardness of the first mounting plate, the second mounting plate and the buffer portion are the same or different.

Optionally, the thicknesses of the first mounting plate, the second mounting plate and the buffer portion are the same or different.

Optionally, the acoustic damping device further includes a sound guide cone, the sound guide cone is arranged on the side of the buffer member away from the housing, and the apex of the sound guide cone faces the second installation hole with the horn set.

Optionally, the housing includes an upper shell and a lower shell, and the upper shell and the lower shell are ultrasonically welded.

Optionally, the assembly process of the acoustic damping device is used to assemble the acoustic damping device according to any one of claims 1-7, the assembly process comprising:

connecting the first connecting part to the horn by fastening;

The second connecting part is fastened to the housing so that the distance between the horn and the housing is independent, and the distance between the first connecting part and the second connecting part is Buffering by the buffer part prevents the vibration energy of the speaker from being transmitted to the shell, the sound pickup of the external microphone, or the natural frequency of other external devices.

Optionally, before the step of fastening the first connecting part to the horn, it may further include:

Installing the first mounting plate on the first connecting portion, or integrally forming the first mounting plate on the first connecting portion;

Before the step of fastening the second connecting part on the housing, it also includes:

Install the second mounting plate on the second connecting portion, or integrally form the first mounting plate on the first connecting portion.

In addition, in order to solve the above problems, the present invention also proposes an audio device, which is one of a high-sensitivity speaker speaker, a high-power speaker, a multi-microphone array speaker, and a multi-speaker combination speaker. The above-mentioned acoustic shock absorbing device is provided, and the acoustic shock absorbing device is a sealed shock absorbing cavity independent of the box body of the audio equipment, and the buffer body absorbs the vibration energy of the speaker, thereby preventing the speaker from The vibration energy is transmitted to the natural frequency of the housing, the pickup of the external microphone or other external equipment.

The technical solution of the present invention provides the buffer part on the shock absorbing mechanism, so that the assembled speaker is indirectly independent of the housing, and isolates the contact between the speaker and the housing, greatly avoiding the The vibration energy of the speaker is transmitted to the housing and away from the natural frequency of the surrounding devices, and most of the kinetic energy is absorbed through the buffer to achieve acoustic shock absorption and avoid noise, giving the device better sound quality and sound source feedback, among which The sound quality refers to the good sound quality heard after the speaker is sounding; the sound source feedback refers to the fact that the microphone picks up the sound without noise under the reverberation and loud speaker.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is the frequency spectrum comparison chart after the speaker in the acoustic damping device of the present invention broadcasts the sound and receives the sound through the microphone on the acoustic damping device

Fig. 2 is the exploded view of the acoustic damping device of the present invention;

Fig. 3 is the explosion diagram of the damping mechanism in the acoustic damping device of the present invention;

Fig. 4 is a structural schematic diagram of the installation of the damping mechanism and the horn in the acoustic damping device of the present invention;

Fig. 5 is a structural schematic diagram of the installation of the shock absorbing mechanism and the housing in the acoustic shock absorbing device of the present invention;

Fig. 6 is a cross-sectional view of the acoustic damping device of the present invention.

Explanation of reference numbers:

label name label name 10 case 11 upper shell 12 lower shell 20 trumpet 30 Shock absorbing mechanism 31 first mounting plate 32 Buffer 321 first connection 322 Buffer 323 second connection 33 Second mounting plate 40 Sound guide cone 50 first mounting hole 60 Second mounting hole

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

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

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

In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, "fixation" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as a combination of technical solutions. Does not exist, nor is it within the scope of protection required by the present invention.

The present invention provides an acoustic damping device, please refer to Fig. 2 to Fig. 6;

The acoustic shock absorbing device includes a housing, a shock absorbing mechanism and a horn, wherein the shock absorbing mechanism includes a buffer, a first mounting plate and a second mounting plate; the central surface of the shock absorbing mechanism has a first mounting hole , the surrounding edge of the shock absorbing mechanism has a second installation hole, the buffer member includes a buffer portion that forms a bump around the edge of the first installation hole, and the buffer portion extends to the side of the first installation hole There is a first connecting portion connected to the first mounting plate, the first connecting portion is connected to the horn, and the buffer portion extends to the side away from the first mounting hole to connect with the second mounting plate a connected second connecting portion, the second connecting portion is connected to the housing;

Wherein, the first mounting plate and the first connecting portion are integrally formed or detachably connected, and the second mounting plate and the second connecting portion are integrally formed or detachably connected;

The buffer part is used to absorb the vibration energy of the speaker and prevent the vibration energy of the speaker from being transmitted to the natural frequency of the shell, the sound pickup of the external microphone or other external devices; wherein, the adjustment between the first connecting part and The distance between the horns and the concave-convex curvature of the buffer are adjusted to adjust the vibration energy transmitted by the horns.

The specific assembly process of the acoustic damping device of the present invention is to install the first mounting plate on the first connecting part;

connecting the first mounting plate and the first connecting portion to the horn by fastening;

installing the second mounting plate on the second connecting portion;

The second mounting plate and the second connecting part are fixed on the housing by screws, so that the distance between the horn and the housing is independent, and the first connecting part and the first connecting part are The buffer part buffers between the two connecting parts, so as to prevent the vibration energy of the speaker from being transmitted to the shell, the sound pickup of the external microphone or the natural frequency of other external devices.

First, please refer to 4, place the first mounting plate on the top surface of the first connecting portion, attach the first mounting plate to the first connecting portion, and attach the first mounting plate to the The threaded holes on the first connecting part are aligned, the horn is attached to the bottom surface of the first connecting part, and the horn, the first mounting plate and the shock absorbing mechanism are connected by screws or bolts. Fixed as one.

The buffer part can be one of circular, square, special-shaped or three-dimensional; the buffer part is one of peak-valley, wave-shaped, ring-shaped, and m-shaped; wherein, the buffer The mechanism adopts forward assembly on the housing or reverse assembly on the housing. One or more of the first mounting plate, the second mounting plate and the buffer part are made of elastic material, wherein the first mounting plate, the second mounting plate and the buffer parts are of the same or different materials. The hardness of the first mounting plate, the second mounting plate and the buffer portion is the same or different. The thicknesses of the first mounting plate, the second mounting plate and the buffer portion are the same or different. The energy transmitted by the horn vibration can be affected by any combination of the above methods.

In this embodiment, the buffer part is bent in a way so that the horn is indirectly firmly connected with the housing, which prevents the huge energy generated by the horn from being transmitted to the housing under high-power sounding. body.

Afterwards, please refer to FIG. 5 , install the assembled horn and the second connecting part on the shock absorbing mechanism on the housing, specifically, install the second connecting part, the first The two mounting plates are attached to the end faces of the housing, and the threaded holes are aligned, and fastened by means of screws or bolts. Then the fastening parts on the sound guide cone are fastened and connected to form. The shock absorbing mechanism is fastened together with the casing through the second connecting part, so that the way of being independent from the casing not only ensures the sealing around the horn, but also largely resists shock through elasticity. The form absorbs the vibration energy of the horn and prevents the energy from being transmitted to the housing.

In the shock-absorbing support assembly formed by supporting the first mounting plate, the second mounting plate and the shock-absorbing mechanism, the shock-absorbing effect is mainly dominated by the shock-absorbing mechanism, and the first mounting plate and the shock-absorbing mechanism The second mounting plate plays the role of support and fastening. The shock-absorbing bracket assembly exists in various combinations, which can be connected in a single piece by the shock-absorbing mechanism, or the first mounting plate and the shock-absorbing mechanism can be formed together and connected to the second mounting plate. The second mounting plate and the shock absorbing mechanism are combined into one piece and connected to the first mounting plate, the first mounting plate and the second mounting plate are integrated and connected to the shock absorbing mechanism, etc., or formed between them In the form of one-piece arrangement and combination, shock-absorbing brackets with different composition levels will also affect the seismic capacity to varying degrees.

Finally, the housing includes an upper shell and a lower shell, and the first installation hole is provided on the end surface of the upper shell away from the lower shell. The upper shell and the lower shell are ultrasonically welded. The groove of the upper shell is fastened together with the protrusion of the lower shell by means of ultrasonic fastening, which further ensures the complete sealing of the horn.

In addition, in order to solve the above problems, the present invention also proposes an audio device, which is one of a high-sensitivity speaker speaker, a high-power speaker, a multi-microphone array speaker and a multi-speaker combination speaker, and the audio device is provided with such In the above-mentioned acoustic damping device, the acoustic damping device is a sealed damping cavity independent of the box of the audio equipment, so as to prevent the vibration energy of the speaker from being transmitted to the housing and sound pickup by the external microphone. or the natural frequency of other external devices.

The acoustic shock absorbing device of the present invention separates the speaker unit from the cabinet and other devices, essentially preventing the huge vibration energy of the speaker unit from being transmitted to the surrounding mechanisms under high power or high sensitivity. Poor sound quality occurs. Fasten the speaker unit and the shock-absorbing buffer body, support bracket and fixed base in the shock-absorbing bracket assembly into one assembly. When vibrating, the elastic buffer of the shock-absorbing buffer absorbs most of the vibration energy, and only a small amount of energy is transmitted. The natural resonant frequency of the speaker unit can affect the elastic resonant frequency through the components formed with the shock-absorbing mechanism, so that the component is far away from the natural frequency of the box and the surrounding mechanism, so as to obtain better shock-absorbing effect. Finally, the connection part of the shock absorbing mechanism is sealed and fastened with the box body to form a speaker sound with an independent sealed box body, and the acoustic effect is further improved through the design of the sound guide cone. The use of this acoustic damping mechanism on the voice interaction equipment ensures that the speaker leaks air, the damping effect is not obvious, and the fatigue resistance is poor, thereby improving the performance and yield of the equipment.

In the situation where the demand for voice interaction performance is getting higher and higher, people's pursuit of high-quality audio sources, and the demand for excellent multi-speak performance of microphone pickup and speaker sound on the same device and under the same work have also attracted more and more attention. The acoustic damping mechanism in this patented invention solves the problem of vibration noise generated by audio playback and noise feedback from multi-microphone array pickup from the source, thereby improving the sound quality of the speaker and the feedback of high-quality audio sources broadcast and recorded simultaneously on the same device. Through such a design, it shows better sound quality feedback such as no noise, no tail sound consistent with the standard sound source, as shown in accompanying drawing 1 (b).

Claims (10)

1. An acoustic damping device, characterized in that, the acoustic damping device comprises a housing, a damping mechanism and a horn, wherein the damping mechanism comprises a buffer, a first mounting plate and a second mounting plate; The central surface of the shock-absorbing mechanism has a first mounting hole, the peripheral edge of the shock-absorbing mechanism has a second mounting hole, and the buffer member includes a concave-convex buffer portion formed around the edge of the first mounting hole, so The buffer portion extends toward the first mounting hole side with a first connecting portion connected to the first mounting plate, the first connecting portion is connected to the horn, and the buffering portion faces away from the first mounting plate. A second connecting portion connected to the second mounting plate extends from one side of the mounting hole, and the second connecting portion is connected to the housing; Wherein, the first mounting plate and the first connecting portion are integrally formed or detachably connected, and the second mounting plate and the second connecting portion are integrally formed or detachably connected; The buffer part is used to absorb the vibration energy of the speaker and prevent the vibration energy of the speaker from being transmitted to the natural frequency of the shell, the sound pickup of the external microphone or other external devices; wherein, the adjustment between the first connecting part and The distance between the horns and the concave-convex curvature of the buffer are adjusted to adjust the vibration energy transmitted by the horns. 2. The acoustic damping device according to claim 1, wherein the damping mechanism is one of circular, square, special-shaped or three-dimensional; the buffer is peak-valley, wave-like, A concavo-convex arrangement in a ring type and an M-shape; wherein, the buffer mechanism is assembled on the housing in a forward direction or assembled in a reverse direction. 3. The acoustic damping device according to claim 1, wherein one or more of the first mounting plate, the second mounting plate, and the buffer portion are made of elastic material, wherein , The materials of the first mounting plate, the second mounting plate and the buffer portion are the same or different. 4 . The acoustic damping device according to claim 1 , wherein the hardness of the first mounting plate, the second mounting plate and the buffer portion are the same or different. 5 . The acoustic damping device according to claim 1 , wherein the thicknesses of the first mounting plate, the second mounting plate and the buffer portion are the same or different. 6. The acoustic damping device according to claim 1, characterized in that the acoustic damping device further comprises a sound guide cone, the sound guide cone is arranged on the side of the buffer member away from the housing, The apex of the sound guide cone is arranged towards the second installation hole and the horn. 7. The acoustic damping device according to claim 1, wherein the housing comprises an upper shell and a lower shell, and the upper shell and the lower shell are ultrasonically welded. 8. An assembly process of an acoustic damping device, characterized in that the assembly process of the acoustic damping device is used to assemble the acoustic damping device according to any one of claims 1 to 7, and the assembly process include: connecting the first connecting part to the horn by fastening; The second connecting part is fastened to the housing so that the distance between the horn and the housing is independent, and the distance between the first connecting part and the second connecting part is Buffering by the buffer portion prevents the vibration energy of the speaker from being transmitted to the shell, the sound pickup of the external microphone, or the natural frequency of other external devices. 9. The assembly process of the acoustic damping device according to claim 1, characterized in that, before the step of connecting the first connecting part to the horn by fastening, it further comprises: Installing the first mounting plate on the first connecting portion, or integrally forming the first mounting plate on the first connecting portion; Before the step of fastening the second connecting part on the housing, it also includes: Install the second mounting plate on the second connecting portion, or integrally form the first mounting plate on the first connecting portion. 10. An audio device, characterized in that the audio device is one of a high-sensitivity speaker speaker, a high-power speaker, a multi-microphone array speaker and a multi-speaker combination speaker, and the audio device is provided with the following claims 1-7 The acoustic damping device described in any one of the above, the acoustic damping device is a sealed damping cavity independent of the box of the audio equipment, and the buffer body absorbs the vibration energy of the speaker, thereby avoiding The vibration energy of the speaker is transmitted to the natural frequency of the shell, the sound pickup of the external microphone or other external devices.

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