阅读说明：本技术 发声模组、发声模组的消声方法和智能眼镜 (Sound production module, sound elimination method of sound production module and intelligent glasses ) 是由 张健 于 2021-07-23 设计创作，主要内容包括：本发明公开一种发声模组、发声模组的消声方法和智能眼镜,其中,所述发声模组包括外壳和发声单体,所述外壳包括移动板以及具有容纳腔的壳本体,所述壳本体上开设有出声孔,所述移动板上开设有泄声孔；所述发声单体位于所述容纳腔内,且将所述容纳腔分隔为与所述出声孔连通的前腔以及与所述泄声孔连通的后腔,所述移动板能够相对所述壳本体移动,以改变所述泄声孔相对所述出声孔的位置。由于移动板能够相对壳本体移动,泄声孔与出声孔的相对位置可以改变,根据波干涉原理可以得知发声模组的消声指向性可以改变,通过移动的泄声孔,在判断人群的相对位置后,可自适应地做出消声指向性的调整,最大程度的保证消费者的隐私。(The invention discloses a sounding module, a silencing method of the sounding module and intelligent glasses, wherein the sounding module comprises a shell and a sounding monomer, the shell comprises a movable plate and a shell body with a containing cavity, a sounding hole is formed in the shell body, and a sound leakage hole is formed in the movable plate; the sound production monomer is located hold the intracavity, and will hold the chamber separate for with the ante-chamber of sound outlet hole intercommunication and with let out the back chamber of sound outlet hole intercommunication, the movable plate can be relative the shell body removes, in order to change let out the sound hole relative the position of sound outlet hole. Because the movable plate can remove relative shell body, let out the relative position of sound hole and sound outlet hole and can change, can learn the noise elimination directive property of sound production module according to the wave interference principle and can change, let out the sound hole through removing, after judging crowd's relative position, can make the adjustment of noise elimination directive property adaptively, furthest's assurance consumer's privacy.)

1. The utility model provides a sound production module, its characterized in that, sound production module includes:

the sound-discharging device comprises a shell, a sound-discharging hole and a sound-discharging hole, wherein the shell comprises a movable plate and a shell body with a containing cavity;

the sound production monomer, the sound production monomer is located hold the intracavity, and will hold the chamber separate for with the ante-chamber of sound outlet hole intercommunication and with let out the back chamber of sound outlet hole intercommunication, the movable plate can be relative the shell body removes, in order to change let out the sound hole relative the position of sound outlet hole.

2. The acoustic module of claim 1, wherein the housing body defines a communication hole corresponding to the sound vent, the rear chamber, the sound vent and the communication hole are sequentially communicated, and an orthographic projection of the sound vent on the housing body is located in the communication hole.

3. The sound generating module as claimed in claim 2, wherein the communication hole and the sound leakage hole extend in the same direction, and the communication hole extends in a width greater than the width of the sound leakage hole, and the moving plate is movable relative to the housing body in the direction in which the communication hole extends.

4. The sound generating module as claimed in claim 2, wherein the housing includes a first side wall and a second side wall opposite to each other, the front cavity is formed between the sound generating unit and the first side wall, the rear cavity is formed between the sound generating unit and the second side wall, the sound outlet is formed on the first side wall, the communication hole is formed on the second side wall, and the moving plate is capable of moving relative to the second side wall.

5. The sound generating module of claim 4, wherein a side of the moving plate away from the sound generating unit is in slidable contact with the second side wall.

6. The sound production module of any one of claims 1 to 5, wherein the moving direction of the moving plate is parallel to the long side of the sound production unit.

7. The sound production module according to any one of claims 1 to 5, further comprising a gear and a knob located in the rear cavity, wherein the moving plate is formed with a rack engaged with the gear, one end of the knob is connected to the gear, and the other end of the knob extends out of the housing.

8. The sound generation module of any one of claims 1-5, wherein the moving plate is a flexible plate.

9. A sound attenuation method of a sound generation module, which is applied to the sound generation module according to any one of claims 1 to 8, and comprises the following steps:

acquiring the positions of people around the sounding module;

determining the direction of the position of the crowd nearest to the sounding module as an optimal silencing angle, and sending a moving instruction according to the optimal silencing angle;

and controlling the moving plate to move to a preset position according to the moving instruction so as to enable the sound reduction area to face the nearest crowd.

10. The intelligent glasses comprise a glasses frame, glasses legs and the sound production module set according to any one of claims 1-8, wherein the glasses legs are connected with the glasses frame, and the sound production module set is located in the glasses legs.

Technical Field

The invention relates to the technical field of intelligent wearing, in particular to a sounding module, a silencing method of the sounding module and intelligent glasses.

Background

With the rapid development of the consumer electronics industry, various intelligent wearable terminals are also in strong demand, for example, smart glasses have many entertainment functions in addition to the functions of the traditional glasses. For example, the smart glasses can be internally provided with a bluetooth system to realize the function of a bluetooth headset, and can be connected with a mobile phone to answer a call or play music stored in the mobile phone by using the smart glasses. And the general structure of sound production module in the present intelligent glasses is fixed, and the unable self-adaptation makes the adjustment of optimal noise elimination directive property to target crowd on every side, influences the privacy.

Disclosure of Invention

The invention mainly aims to provide a sound production module, a sound elimination method of the sound production module and intelligent glasses, and aims to solve the technical problem that privacy is affected because the sound production module in the existing intelligent glasses cannot adjust sound production directivity.

In order to achieve the above object, the present invention provides a sound module, including:

the sound-discharging device comprises a shell, a sound-discharging hole and a sound-discharging hole, wherein the shell comprises a movable plate and a shell body with a containing cavity;

the sound production monomer, the sound production monomer is located hold the intracavity, and will hold the chamber separate for with the ante-chamber of sound outlet hole intercommunication and with let out the back chamber of sound outlet hole intercommunication, the movable plate can be relative the shell body removes, in order to change let out the sound hole relative the position of sound outlet hole.

Optionally, the shell body is provided with a communication hole corresponding to the sound leakage hole, the rear cavity, the sound leakage hole and the communication hole are sequentially communicated, and an orthographic projection of the sound leakage hole on the shell body is located in the communication hole.

Alternatively, the communication hole and the sound leakage hole may extend in the same direction, and the communication hole may extend in a width greater than the width in which the sound leakage hole extends, and the moving plate may be movable relative to the case body in the direction in which the communication hole extends.

Optionally, the shell body includes relative first lateral wall and the second lateral wall that sets up, the sound production monomer with form between the first lateral wall the front chamber, the sound production monomer with form between the second lateral wall the back chamber, the sound outlet is seted up on the first lateral wall, the intercommunicating pore is seted up on the second lateral wall, the movable plate can be relative the second lateral wall removes.

Optionally, a side of the moving plate away from the sounding unit is in slidable contact with the second side wall.

Optionally, the moving direction of the moving plate is parallel to the long side of the sounding unit.

Optionally, the sound generating module further comprises a gear and a knob located in the rear cavity, a rack meshed with the gear is formed on the moving plate, one end of the knob is connected with the gear, and the other end of the knob extends out of the outer side of the shell body.

Optionally, the moving plate is a flexible plate.

In addition, the invention also provides a silencing method of the sound production module, which comprises the following steps:

acquiring the positions of people around the sounding module;

determining the direction of the position of the crowd nearest to the sounding module as an optimal silencing angle, and sending a moving instruction according to the optimal silencing angle;

and controlling the moving plate to move to a preset position according to the moving instruction so as to enable the sound reduction area to face the nearest crowd.

Moreover, the invention also provides intelligent glasses, which comprise a glass frame, glass legs and the sound production module, wherein the glass legs are connected with the glass frame, and the sound production module is positioned in the glass legs.

According to the technical scheme, the sound production module comprises a shell and sound production monomers, the shell comprises a movable plate and a shell body with a containing cavity, the sound production monomers are located in the containing cavity, the containing cavity is divided into a front cavity and a rear cavity by the sound production monomers, sound outlet holes communicated with the front cavity are formed in the shell body, sound leakage holes communicated with the rear cavity are formed in the movable plate, the movable plate can move relative to the shell body, the positions of the sound leakage holes relative to the sound outlet holes are not fixed, the sound leakage holes can change along with the movement of the movable plate, the sound attenuation directivity of the sound production module can be changed according to the wave interference principle, the sound attenuation holes can be moved, the sound attenuation directivity can be adjusted in a self-adaptive mode after the relative positions of crowds are judged, and the privacy of consumers is guaranteed to the maximum extent.

Drawings

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

FIG. 1 is a schematic diagram of smart eyewear in accordance with one embodiment of the present invention;

FIG. 2 is a schematic diagram of a sound module according to an embodiment of the present invention;

fig. 3 is a schematic view of a sound module according to another angle in an embodiment of the present invention;

FIG. 4 is a schematic view illustrating the cooperation between the gear and the rack of the sound module according to an embodiment of the present invention;

fig. 5 is a schematic diagram of the muffling directivity of the sound module according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the muffling directivity of the sound module according to another embodiment of the present invention;

fig. 7 is a schematic diagram of the muffling directivity of the sound emitting module according to another embodiment of the present invention.

Examples reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Intelligent glasses	11	Glasses legs
12	Picture frame	20	Sound production module
				30	Outer casing	31	Shell body
32	Movable board	321	Sound release hole
				311	Sound outlet	40	Sound monomer
21	Containing cavity	211	Front cavity
				212	Rear cavity	312	First side wall
313	Second side wall	314	Third side wall
				315	The fourth side wall	41	Long side
22	Gear wheel	322	Rack bar
				23	Rotary knob	50	Sound reduction zone
316	Communicating hole

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

Detailed Description

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

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

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

The invention provides a sound generating module 20, as shown in fig. 2 and 3, the sound generating module 20 includes a housing 30 and a sound generating unit 40, the housing 30 includes a moving plate 32 and a housing body 31 having a containing cavity 21, the housing body 31 is provided with a sound outlet 311, and the moving plate 32 is provided with a sound outlet 321; the sound generating unit 40 is located in the accommodating cavity 21, and divides the accommodating cavity 21 into a front cavity 211 communicated with the sound outlet 311 and a rear cavity 212 communicated with the sound outlet 321, and the moving plate 32 can move relative to the casing body 31 to change the position of the sound outlet relative to the sound outlet 311.

According to the derivation formula of the superposition of the dipole radiation sound field on the space radiation sound pressure of two small ball sources with equal amplitude and opposite phases in the acoustic foundation, the method comprises the following steps:

wherein A is a undetermined constant (complex number),the absolute value of (d) is the amplitude of the sound pressure. Sound field far from the sound source, let us assumer>>Iota, the difference of the amplitudes of the sound waves radiated by the two small ball sources when reaching the observation point p is small, and the amplitude part r in the formula 1 can be expressed₊And r_-Are all approximately replaced by r, the following approximation is obtained from the above fig. 1:

substituting equation 2 into the phase portion of equation 1 yields:

the two globule sources are very close together and when the frequency is not very high, it can be said that with k iota <1 then equation 3 can be simplified as:

as can be seen from equation 4, the sound pressure of the dipole radiation sound field at a position far away from the sound source decreases inversely with the distance, and the difference from the pulsed sphere radiation sound field is that the dipole radiation is related to the angle θ, that is, the sound pressure is different at the same distance and different positions in different directions in the sound field, and in the direction of θ ═ 90 °, the sound waves from the two small sphere sources are exactly equal in amplitude and opposite in phase, so that all the sound waves cancel each other out, and the resultant sound pressure is zero; in the directions of theta being 0 DEG and 180 DEG, the amplitudes and phases of the sound waves from the two small ball sources are approximately equal, so that the superposition is strengthened, and the synthesized sound pressure is maximum. To describe this characteristic of the sound source radiation varying with direction, we define the ratio of the sound pressure amplitude in any θ direction to the sound pressure amplitude on the axis θ ═ 0 ° as the radiation directivity characteristic of the sound source, that is:

for a dipole sound source, the directional characteristic obtained from equation 5 is:

d (θ) ═ cos θ | equation 6

Based on the principle of dipole acoustic interference, the noise elimination direction of the dipole is related to the relative position of two point sources, i.e., the angle θ affects the directivity of noise elimination. The sounding unit 40 of the present invention may include a vibration system and a magnetic circuit system having a magnetic gap, the vibration system includes a diaphragm and a voice coil supporting the diaphragm to vibrate, the voice coil is electrically connected to an external circuit, and when the voice coil is powered on, the voice coil vibrates under the influence of a magnetic field generated by the magnetic circuit system, so as to drive the diaphragm to vibrate and sound. The front cavity 211 is formed between the diaphragm and the housing body 31, and sound generated by vibration of the diaphragm is transmitted from the sound outlet hole 311 through the front cavity 211. In order to ensure smooth airflow in the sounding unit 40 when the diaphragm vibrates, the moving plate 32 of the housing 30 is provided with the sound-leaking hole 321, and the airflow can flow out of the sound-leaking hole 321 to the outside of the sounding module 20 through the rear cavity 212, so that the acoustic performance of the sounding module 20 is improved. Since the moving plate 32 can move relative to the housing body 31, that is, the sound outlet hole 321 can move, and the position of the sound outlet hole 311 is fixed, the relative position between the sound outlet hole 321 and the sound outlet hole 311 can be changed, fig. 5 to 7 show the change of the directivity of the sound attenuation in the case of different relative positions between the sound outlet hole 321 and the sound outlet hole 311, and the sound attenuation region 50 changes along with the change of the relative positions of the sound outlet hole 321 and the sound outlet hole 311.

It should be noted that the sound module 20 is particularly suitable for being used as the sound module 20 of the smart glasses 10, but is not limited to being used as the sound module 20 of the smart glasses 10, and if there are other wearable devices to which the sound module 20 provided by the present invention is applied, the wearable devices should also fall within the protection scope of the present invention. The smart glasses 10 may be glasses with a microphone mounted on the glasses legs 11 and the sound module 20, or VR glasses or AR glasses. The intelligent glasses 10 can obtain the directions of surrounding crowds through far-field pickup algorithm processing, or the directions of the surrounding crowds are determined by additionally installing a camera module, a laser sensor and the like, the direction of the crowd nearest to a user is set to be an optimal noise elimination angle, then an optimal noise elimination angle instruction is provided for the sound production module, the movable plate 32 moves to an optimal position according to the noise elimination attenuation direction, self-adaptive far-field noise elimination is achieved, the privacy of the intelligent glasses 10 is optimized, and the privacy of consumers is guaranteed.

Specifically, the casing body 31 is provided with a communication hole 316 corresponding to the sound leakage hole 321, the rear cavity 212, the sound leakage hole 321 and the communication hole 316 are sequentially communicated, and the orthographic projection of the sound leakage hole 321 on the casing body 31 is located in the communication hole 316. When the diaphragm vibrates, the airflow generated in the sound generating unit 40 can be discharged through the rear cavity 212, the sound leakage hole 321 and the communication hole 316, the size of the communication hole 316 is larger than that of the sound leakage hole 321 to adapt to the moving range of the sound leakage hole 321, when the sound leakage hole 321 moves, the shell body 31 does not shield the sound leakage hole 321, the relative positions of two point sound sources can be changed through the movement of the sound leakage hole 321, and the sound reduction area 50 is changed accordingly. The moving plate 32 is accommodated in the rear cavity 212 without affecting the appearance of the sound module 20. In other embodiments, the moving plate 32 may be disposed outside the case body 31, that is, the rear chamber 212, the communication hole 316 and the sound discharge hole 321 are sequentially communicated; it is also possible to directly provide one side of the case body 31 as an opening, and directly cover the moving plate 32 on the opening, as long as the relative positions of the sound leakage hole 321 and the sound outlet hole 311 can be changed.

More specifically, the extension direction of the communication hole 316 and the extension direction of the sound leakage hole 321 are the same, the extension width of the communication hole 316 is greater than the extension width of the sound leakage hole 321, the moving plate 32 can move relative to the housing body 31 along the extension direction of the communication hole 316, for example, the communication hole 316 is a long-strip-shaped through hole, the width of the sound leakage hole 321 is less than the width of the communication hole 316, the moving plate 32 moves along the extension direction of the communication hole 316, the movement range of the sound leakage hole 321 can be increased, the communication hole 316 does not occupy a large space, the communication hole 316 can be arranged according to the movement requirement of the moving plate 32, the communication hole 316 does not affect the overall appearance of the sound module 20, and the structural stability of the housing 30 can be improved.

Optionally, the housing body 31 includes a first side wall 312 and a second side wall 313 which are oppositely arranged, a front cavity 211 is formed between the sound generating unit 40 and the first side wall 312, a rear cavity 212 is formed between the sound generating unit 40 and the second side wall 313, the sound outlet hole 311 is opened on the first side wall 312, the communication hole 316 is opened on the second side wall 313, and the moving plate 32 is capable of moving relative to the second side wall 313, that is, the sound outlet hole 311 and the movable sound outlet hole 321 are oppositely arranged, so that the sound reduction region 50 is directed to the surrounding crowd, and the privacy effect is better. The shell body 31 further comprises a third side wall 314 and a fourth side wall 315 which are oppositely arranged, the first side wall 312, the third side wall 314, the second side wall 313 and the fourth side wall 315 are sequentially connected end to end, two ends of the sound generating unit 40 are respectively connected with the third side wall 314 and the fourth side wall 315, wherein the first side wall 312 and the second side wall 313 can be directly used as outer wall surfaces of the glasses legs 11 of the smart glasses 10, for example, the sound outlet hole 311 is arranged at the outer side of the glasses legs 11, namely, at the side facing the ears of the user, and the sound outlet hole 321 and the communication hole 316 are arranged at the inner side of the glasses legs 11, namely, at the side facing the heads of the user.

More finely, one side of the moving plate 32, which is far away from the sounding unit 40, is in slidable contact with the second side wall 313, the moving plate 32 is located inside the shell body 31, and the moving plate 32 is in direct contact with the second side wall 313, so that the space is saved, and the height of the sounding module 20 is reduced. The moving plate 32 can move by being driven by a driving mechanism, for example, the driving mechanism is a micro motor, the motor is connected to the moving plate 32, and after receiving an optimal sound attenuation angle command sent by the control system, the motor drives the moving plate 32 to move, so that the sound leakage holes 321 move to corresponding positions to meet the optimal sound attenuation angle. The sliding connection can also be realized by providing a sliding rail or a sliding groove on the side of the moving plate 32 away from the sound generating unit 40, and providing a corresponding sliding groove or sliding rail on the second side wall 313. In other embodiments, the moving plate 32 may also be in sliding contact with a side of the second sidewall 313 away from the sound emitting unit 40 to achieve movement of the sound leakage hole 321.

In a preferred embodiment, the moving direction of the moving plate 32 is parallel to the long sides 41 of the sounding unit 40, so that the moving range of the sound-discharging holes 321 can be expanded to perform directional sound-discharging for people at different angles around. First lateral wall 312 and second lateral wall 313 are parallel with the long limit 41 of sound production monomer 40 respectively, and the long limit 41 of sound production module 20 is unanimous with the extending direction of smart glasses 10 earpiece 11, can reduce the thickness of earpiece 11. The first side wall 312 and the second side wall 313 may be directly used as a part of the outer wall of the temple 11, so that the space of the temple 11 can be fully utilized, the overall appearance of the temple 11 is not affected, and the appearance is kept consistent.

The moving plate 32 of this embodiment is preferably a flexible plate, for example, a plate-shaped structure that can be deformed such as rubber or a relatively thin steel sheet, aluminum sheet, etc., when both ends of the moving plate 32 contact the housing body 31 of the sound module 20, the moving plate 32 can be curled to deform, but the housing body 31 does not affect the movement of the moving plate 32, the position of the sound vent 321 relative to the sound vent 311 can still be changed, and on the premise of ensuring that the movement range of the sound reduction region 50 is large enough, the size of the sound module 20 can be reduced, and the space of the glasses legs 11 is not occupied.

In an embodiment, as shown in fig. 3 and 4, the sound module 20 further includes a gear 22 located in the rear cavity 212, the moving plate 32 is formed with a rack 322 engaged with the gear 22, the gear 22 can be connected to a driving mechanism (e.g., a micro motor), and the cooperation of the gear 22 and the rack 322 makes the moving range of the moving plate 32 more precise, divides the moving plate 32 into a plurality of shift positions, and realizes more precise adjustment of the sound attenuation directivity by corresponding the sound attenuation angle to different shift positions.

Optionally, the sound module 20 further includes a knob 23, one end of the knob 23 is connected to the gear 22, the other end of the knob 23 extends out of the outer side of the shell body 31, and a user can manually adjust the movement of the moving plate 32 according to requirements.

In addition, the invention also provides a sound elimination method of the sound generation module 20, which comprises the following steps:

acquiring the positions of people around the sounding module 20;

determining the direction of the position of the crowd closest to the sound production module 20 as an optimal sound elimination angle, and sending a movement instruction according to the optimal sound elimination angle;

and controlling the moving plate 32 to move to a preset position according to the moving instruction so as to enable the sound reduction area to face the nearest crowd.

According to the invention, the directions of surrounding people can be obtained through far-field sound pickup algorithm processing, or the directions of the surrounding people are determined by additionally installing a camera module, a laser sensor and the like, then the direction of the nearest people is determined as the optimal noise elimination angle, then a moving instruction is sent to the moving plate 32, a preset table corresponding to the noise elimination angle and the moving position of the moving plate can be stored in the sound generation module, the moving plate 32 is controlled to move to the preset position corresponding to the optimal noise elimination angle, so that the relative positions of the sound leakage hole 321 and the sound outlet hole 311 meet the requirement that a sound reduction area faces to the nearest people around the sound generation module 20, self-adaptive far-field noise elimination is realized, the privacy of the intelligent glasses 10 is optimized, and the privacy of consumers is ensured.

In addition, the invention further provides an intelligent glasses 10, as shown in fig. 1, the intelligent glasses 10 includes a glasses frame 12, glasses legs 11 and the sound module 20, the glasses legs 11 are connected with the glasses frame 12, and the sound module 20 is located in the glasses legs 11. The specific structure of the sound module 20 refers to the above embodiments, and since the smart glasses 10 adopt all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are at least achieved, which is not repeated herein.

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