WO2022141109A1

WO2022141109A1 - Bone conductive sound-producing device

Info

Publication number: WO2022141109A1
Application number: PCT/CN2020/141065
Authority: WO
Inventors: 马雷; 范小利; 马佳弘; 赵佑铭
Original assignee: 雷铭科技有限公司
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-07-07
Also published as: CN116508330A

Abstract

A bone conductive sound-producing device, comprising a controller, a sound producing structure, and a functional structure. The sound producing structure is respectively connected to the controller and the functional structure; the sound producing structure comprises an outer structure (10) having a vibration space inside, and at least one transducer unit accommodated in the vibration space and capable of vibrating; the transducer unit comprises a vibration element (20) and at least one driving element (30); the vibration element (20) comprises a first vibration member (202) and a second vibration member (203), the first vibration member (202) and the second vibration member (203) are respectively located on two sides of an elastic element (201) and are both connected to the elastic element (201), and two ends of the elastic element (201) are respectively connected to two opposite inner side walls of the vibration space; the driving element (30) is arranged close to at least one of the first vibration member (202) and the second vibration member (203). The bone conductive sound-producing device solves the technical problem that a final bone conductive sound-producing device has a large size due to the fact that an external packaging structure of a sound producing structure has a large size, and thus the bone conductive sound-producing device cannot be applied to a smaller space.

Description

Bone conduction sound device

technical field

The present application relates to the technical field of bone conduction, and in particular, to a bone conduction sound device.

Background technique

The essence of sound waves is vibration, so all sources that can be perceived as sound by humans or other living things are mechanical vibrations. Bone conduction vocalization generally refers to the direct transmission of sound signals to the auditory system of humans or other creatures by means of vibration through biological tissues such as skin tissue, muscle tissue, teeth, and bones, without the need to transmit sound waves through the air. Technology that receives vibration signals and perceives them as sounds. The bone conduction sound-generating device includes an independently packaged controller, a sound-generating structure and a functional structure, and the sound-generating structure is respectively connected with the controller and the functional structure. Driven by the controller, the sound-generating structure generates vibration signals, and transmits the vibration signals directly to the auditory system of the target's skin tissue, muscle tissue, teeth, bones and other biological tissues by touching the functional structure.

At present, when using bone conduction sound-generating equipment, it usually needs to be clipped behind the ear and other parts, so as to transmit the vibration to the skin tissue, muscle tissue and bone successively to the auditory system. The vibrating element in the sound-generating structure is provided with an elastic element, the elastic element is arranged on the side of the vibrating element away from the driving element, and both ends of the elastic element are connected with the packaging structure. The vibration signal is generated by the interaction of the magnetic field between the vibration element and the driving element in the sound-generating structure, and is transmitted to the external packaging structure through the elastic element and the driving element, and further transmitted to the human body.

However, since the vibrating element occupies a large space in its external packaging structure, the volume of the external packaging structure is large, which eventually leads to a large volume of the bone conduction sound-producing device, so the bone conduction sound-producing device cannot be applied to a smaller space field.

SUMMARY OF THE INVENTION

The present application provides a bone conduction sound-generating device, which solves the problem that since the vibration element occupies a large space in its external packaging structure, the volume of the external packaging structure is large, and finally the bone conduction sound-generating device is large in size, so the bone The technical problem of the application of conductive sound-emitting devices in smaller spaces.

Embodiments of the present application provide a bone conduction sounding device, including: a controller, a sounding structure and a functional structure;

The sounding structure is connected with the controller and the functional structure, respectively;

The sound-emitting structure includes: an external structure with a vibration space inside, and at least one transducer unit accommodated in the vibration space and capable of vibrating;

The transducer unit includes a vibrating element and at least one driving element, the vibrating element has at least an elastic element, the elastic element is arranged laterally in the vibration space, and the two ends of the elastic element are respectively connected with two opposite inner side walls of the vibration space, and the driving element is located in the vibration space. It is fixedly arranged near the vibration element in the vibration space;

The vibrating element includes a first vibrating member and a second vibrating member, and the first vibrating member and the second vibrating member are respectively located on both sides of the elastic element and both are connected with the elastic element;

The driving element is disposed adjacent to at least one of the first vibrating member and the second vibrating member.

In this way, by setting the vibrating element as a first vibrating member and a second vibrating member, and the first vibrating member and the second vibrating member are respectively located on both sides of the elastic element and are connected with the elastic element, the driving element is close to the first vibrating member. and at least one of the second vibrating member is provided. Since the elastic element is located between the first vibrating element and the second vibrating element, the volume occupied by the elastic element is smaller than that when the elastic element is arranged on the side of the vibrating element facing away from the driving element. Therefore, by changing the setting position of the elastic element, the volume occupied by the sound-generating structure can be reduced, thereby reducing the encapsulation volume of the sound-generating structure, so that the overall volume of the bone conduction sound device can be reduced, and the application scenarios of the bone conduction sound device can be expanded. Sound-emitting devices are used in smaller spaces, such as dentures.

In a possible implementation, the driving element is fixed on the inner top wall or/and the inner bottom wall of the vibration space.

In a possible implementation manner, there is one driving element, and the driving element is a coil, and both the first vibrating member and the second vibrating member are coils;

Alternatively, both the first vibrating member and the second vibrating member are magnets;

Or, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a magnet;

Or, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a non-magnetic ferromagnetic solid;

Alternatively, both the first vibrating member and the second vibrating member are non-magnetic ferromagnetic solids.

In a possible implementation manner, there is one driving element, and the driving element is a magnet or a non-magnetic ferromagnetic solid, and both the first vibrating member and the second vibrating member are coils.

In a possible implementation manner, the number of driving elements is two, the two driving elements are a first driving element and a second driving element respectively, the first driving element is located on the side of the first vibrating member away from the elastic element, the first driving element is The two driving elements are located on the side of the second vibrating element facing away from the elastic element.

In a possible implementation manner, the first driving element and the second driving element are both coils, and the first vibrating member and the second vibrating member are both coils;

In a possible implementation manner, both the first driving element and the second driving element are magnets, and the first vibrating member and the second vibrating member are both coils.

In a possible implementation manner, one of the first driving element and the second driving element is a coil, the other of the first driving element and the second driving element is a magnet or a non-magnetic ferromagnetic solid, and the first driving element and the second driving element are Both the vibrating member and the second vibrating member are coils.

In a possible implementation manner, when at least one driving element is a coil, the coil has a first space for the first vibrating member or the second vibrating member to vibrate,

Alternatively, when at least one driving element is a magnet or a non-magnetic ferromagnetic solid, the first vibrating member and/or the second vibrating member have a second space for the magnet to extend or the ferromagnetic solid to enter.

In a possible implementation manner, the elastic element is a flat elastic piece.

In a possible implementation manner, the elastic element is a rubber sheet, a sound diaphragm or a flat spring.

In a possible implementation manner, there are multiple transducer units, and the frequency response ranges of the multiple transducer elements are different;

Alternatively, each transducing element includes at least one distinct frequency response range.

In one possible implementation, the sound-generating structure, the controller and the functional structure are packaged to form an integrated bone conduction sound-generating device.

A bone conduction sound-generating device provided by the embodiment of the present application comprises a controller, a sound-generating structure and a functional structure; the sound-generating structure is connected with the controller, and is used for generating a vibration signal under the driving of the controller; the functional structure is connected with the controller. The sounding structure is connected. The sound-emitting structure includes: an external structure with a vibration space inside, and at least one transducer unit that is accommodated in the vibration space and can vibrate; the external structure is used to encapsulate the transducer unit, and the electrical signal sent by the controller is converted by the transducer unit. The vibration signal is transmitted to the external structure, to the functional structure through the external structure, and finally to the user's auditory system through the functional structure. The transducer unit includes a vibrating element and at least one driving element, the vibrating element has at least an elastic element, the elastic element is arranged laterally in the vibration space, and the two ends of the elastic element are respectively connected with two opposite inner side walls of the vibration space, and the driving element is located in the vibration space. The vibrating space is fixedly arranged near the vibrating element. When the electrical signal sent by the controller changes, the magnetic field between the driving element and the vibration element changes, the action direction and magnitude of the force between the electrical element and the vibration element change, and the direction and magnitude of the vibration generated by the vibration element change accordingly. And through the elastic element in the vibration element, the vibration is transmitted to the external structure connected with it. The vibrating element includes a first vibrating member and a second vibrating member, and the first vibrating member and the second vibrating member are respectively located on both sides of the elastic element and are connected with the elastic element; the driving element is close to the first vibrating member and the second vibrating member at least one of the settings. In the present application, the position of the elastic element is changed, and the elastic element is arranged at a position close to the middle of the vibration space. The volume occupied by the sound-generating structure is reduced, thereby reducing the encapsulation volume of the sound-generating structure, so that the overall volume of the bone conduction sound device is reduced, and the application scenarios of the bone conduction sound device can be expanded, so that the bone conduction sound device can be applied in a smaller space field. like dentures. In addition, the volume of the bone conduction sound-emitting device can also be reduced, thereby reducing the weight of the packaging shell thereof, so as to reduce the oppression of the bone-conduction sound-emitting device to the user and improve the user experience. Therefore, the bone conduction sound-generating device provided in this embodiment solves the problem that because the vibration element occupies a large space in its external packaging structure, the volume of the external packaging structure is large, and finally the bone conduction sound-generating device is large in size, so it cannot be Bone conduction sound-generating equipment is applied to technical problems in smaller spaces.

Description of drawings

1 is a schematic structural diagram of a sound-emitting structure when there is one driving element provided in an embodiment of the present application;

FIG. 2 is another structural schematic diagram of the sound-emitting structure when there is one driving element provided in an embodiment of the present application;

3 is a schematic structural diagram of a sound-emitting structure when there are two driving elements provided in an embodiment of the present application;

4 is another structural schematic diagram of the sound-emitting structure when there are two driving elements provided in an embodiment of the present application;

5 is a schematic structural diagram of a sound-emitting structure provided by an embodiment of the present application;

6 is a schematic structural diagram of the vibrating element in FIG. 5 at the maximum amplitude provided by an embodiment of the present application;

Fig. 7 is a kind of structural schematic diagram that the elastic element is located on the side of the vibrating element away from the driving element;

FIG. 8 is a schematic structural diagram of the vibrating element in FIG. 7 at the maximum amplitude;

FIG. 9 is another schematic structural diagram of a sound-emitting structure provided by an embodiment of the present application;

Fig. 10 is another structural schematic diagram of the elastic element on the side of the vibrating element away from the driving element.

Description of reference numbers:

10: External structure;

20: Vibration element;

30: drive element;

40: first space;

50: second space;

201: elastic element;

202: the first vibration element;

203: the second vibration element;

301: the first driving element;

302: The second driving element.

Detailed ways

The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application.

Bone conduction is the use of human skull, inner ear lymph, auditory nerve and other carriers to transmit sound waves, so that people can hear sound. Compared with other sound transmission methods, the advantage of bone conduction is that the sound can be heard clearly even in a noisy environment, and the diffused sound will not affect other people around. Bone conduction uses bone vibration to conduct sound, and transmits the sound directly through the skull to the ear nerve inside the ear, without passing through the external auditory canal and eardrum, and will not damage the eardrum and ossicular chain, so the user's hearing will not be affected.

At present, when using bone conduction sound-generating equipment, it usually needs to be clipped in a small space such as behind the ear, so as to transmit the vibration to the skin tissue, muscle tissue and bone in turn to the auditory system. The vibrating element in the sound-generating structure is provided with an elastic element, the elastic element is arranged on the side of the vibrating element away from the driving element, and both ends of the elastic element are connected with the packaging structure. The vibration signal is generated by the interaction of the magnetic field between the vibration element and the driving element in the sound-generating structure, and is transmitted to the external packaging structure through the elastic element and the driving element, and further transmitted to the human body.

However, since the elastic element is arranged on the side of the vibrating element away from the driving element, the elastic element itself has a larger lateral area and will occupy a larger packaging space. Ultimately, the bone conduction sounding device is bulky. When the bone conduction sound device is large, the application scenarios of the bone conduction sound device are limited, and the bone conduction sound device cannot be applied to a smaller space. Therefore, in order to expand the application of the bone conduction sound device in a smaller space, it is very important to reduce the volume of the bone conduction sound device.

Based on the above problems, the embodiments of the present application provide a bone conduction sound-producing device, by setting the vibrating element as a first vibrating member and a second vibrating member, and the first vibrating member and the second vibrating member are respectively located on both sides of the elastic element and Both are connected with the elastic element, and the driving element is arranged close to at least one of the first vibrating member and the second vibrating member. Since the elastic element is located between the first vibrating element and the second vibrating element, the volume occupied by the elastic element is smaller than that when the elastic element is arranged on the side of the vibrating element facing away from the driving element. Therefore, by changing the setting position of the elastic element, the volume occupied by the sound-generating structure is reduced, thereby reducing the encapsulation volume of the sound-generating structure, so that the overall volume of the bone conduction sound-generating device is reduced, and the application scene of the bone-conduction sound-generating device can be expanded. The device is used in smaller spaces, such as dentures.

As shown in FIG. 1-FIG. 4, this embodiment provides a bone conduction sound-generating device, including: a controller, a sound-generating structure and a functional structure, and the sound-generating structure is respectively connected with the controller and the functional structure. The sound-generating structure is connected to the controller for generating vibration signals under the drive of the controller; the functional structure is connected to the sound-generating structure for touching the user's skin tissue, muscle tissue, teeth, and bones, etc. Biological tissue transmits sound directly to its auditory system.

Optionally, the sound-generating structure and the controller are independent units, and the two components can be connected by wires, so that the controller transmits the control signal to the sound-generating structure in the form of electrical signals. Of course, the sounding structure and the controller can also be directly connected by mechanical structures such as plugging or clipping. Alternatively, the connection is achieved through a wireless connection such as Bluetooth.

In this embodiment, the sound-generating structure includes: an external structure 10 with a vibration space inside, and at least one transducer unit that is accommodated in the vibration space and can vibrate; the external structure 10 is used to encapsulate the transducer unit, and the electrical energy sent by the controller The signal is converted into a vibration signal by the transducer unit, and the vibration signal is transmitted to the external structure 10 , and then transmitted to the functional structure through the external structure 10 , and finally transmitted to the user's auditory system through the functional structure.

Further, the transducer unit includes a vibrating element 20 and at least one driving element 30, the vibrating element 20 has at least an elastic element 201, the elastic element 201 is arranged laterally in the vibration space, and two ends of the elastic element 201 are respectively opposite to the vibration space. The two inner side walls are connected, and the driving element 30 is fixedly arranged near the vibration element 20 in the vibration space. When the electrical signal sent by the controller changes, the magnetic field between the driving element 30 and the vibrating element 20 changes, the direction and magnitude of the force between the driving element 30 and the vibrating element 20 change, and the direction and magnitude of the vibration generated by the vibrating element 20 are changed. The size changes accordingly, and this vibration is transmitted to the external structure 10 connected thereto through the elastic element 201 in the vibration element 20 .

In this embodiment, the vibrating element 20 includes a first vibrating element 202 and a second vibrating element 203, and the first vibrating element 202 and the second vibrating element 203 are respectively located on both sides of the elastic element 201 and are connected to the elastic element 201; When the element 20 vibrates, the first vibrating member 202 and the second vibrating member 203 generate an interaction force with the driving element 30 together. The element 201 vibrates, and then the vibration signal is transmitted to the external structure 10 through the elastic element 201 and the driving element 30 . Disposing the elastic element 201 between the first vibrating element 202 and the second vibrating element 203 in the embodiment of the present application occupies a smaller volume than disposing the elastic element 201 on the side of the vibrating element 20 away from the driving element 30 . Therefore, by changing the position of the elastic element 201 in the vibration space, the volume occupied by the sound-generating structure is reduced, thereby reducing the encapsulation volume of the sound-generating structure, reducing the overall volume of the bone conduction sound device, and expanding the application scenarios of the bone conduction device. , which can make the bone conduction sound device applied in smaller space areas, such as dentures. In addition, in order to ensure a certain sound quality, it is required that the part of the bone conduction sound generating device to be closely fitted to the user is closely fitted, which brings a certain sense of oppression to the user when using it. The larger the volume of the external encapsulation structure, the heavier the weight, the greater the sense of oppression brought by the bone conduction sound device to the user. Therefore, it is also possible to reduce the volume of the bone conduction sound device, thereby reducing the weight of the package shell, so as to reduce the pressure on the user by the bone conduction sound device and improve the user experience.

In this embodiment, the driving element 30 is disposed close to at least one of the first vibrating member 202 and the second vibrating member 203 . Exemplarily, the driving element 30 may be one, the driving element 30 may be disposed close to one of the first vibrating member 202 and the second vibrating member 203 , and the driving element 30 and the vibrating element 20 form a transducer unit. Of course, the number of driving elements 30 may also be two. The two driving elements 30 are located on both sides of the vibrating element 20, respectively, and are respectively disposed close to the first vibrating member 202 and the second vibrating member 203, that is, one driving element 30 is close to the first vibrating member 203. The other driving element 30 is arranged close to the second vibrating element 203 . At this time, one or more driving elements 30 and one or more vibrating elements 20 may form one or more transducer units with different frequency response ranges.

In this embodiment, the inner contour of the outer structure 10 is the space required for the installation of the driving element 30 and the vibrating element 20 and the minimum envelope that retains the necessary assembly clearance and amplitude space between the driving element 30 and the vibrating element 20 , that is, under the premise of satisfying the function, the volume occupied by the transducer unit should be as small as possible, so that the bone conduction sound device can be applied in a smaller space and reduce the oppression caused to the user, and improve the user experience.

The bone conduction sound-generating device provided in this embodiment includes a controller, a sound-generating structure and a functional structure; the sound-generating structure is connected to the controller, and is used to generate a vibration signal under the driving of the controller; the functional structure is connected with the sound-generating structure. connect. The sound-emitting structure includes: an external structure 10 with a vibration space inside, and at least one transducer unit that is accommodated in the vibration space and can vibrate; the external structure 10 is used to encapsulate the transducer unit, and the electrical signal sent by the controller is transmitted by the transducer unit. The vibration signal is converted into a vibration signal, and the vibration signal is transmitted to the external structure 10, to the functional structure through the external structure 10, and finally to the user's auditory system through the functional structure. The transducer unit includes a vibrating element 20 and at least one driving element 30, the vibrating element 20 has at least an elastic element 201, the elastic element 201 is arranged laterally in the vibration space, and the two ends of the elastic element 201 are respectively opposite to two inner sides of the vibration space. The walls are connected, and the driving element 30 is fixedly arranged in the vibration space close to the vibration element 20 . When the electrical signal sent by the controller changes, the magnetic field between the driving element 30 and the vibration element 20 changes, the direction and magnitude of the force between the electrical element and the vibration element 20 change, and the direction and magnitude of the vibration generated by the vibration element 20 change. It changes accordingly, and transmits this vibration to the external structure 10 connected thereto through the elastic element 201 and the driving element 30 in the vibration element 20 . The vibrating element 20 includes a first vibrating element 202 and a second vibrating element 203, and the first vibrating element 202 and the second vibrating element 203 are respectively located on both sides of the elastic element 201 and are connected to the elastic element 201; the driving element 30 is close to the first vibrating element 201. At least one of the vibration member 202 and the second vibration member 203 is provided. In this application, the position of the elastic element 201 is changed, and the elastic element 201 is arranged between the first vibrating member 202 and the second vibrating member 203 . The volume occupied by the sound-generating structure is reduced, thereby reducing the encapsulation volume of the sound-generating structure, so that the overall volume of the bone conduction sound device is reduced, and the application scenarios of the bone conduction sound device can be expanded, so that the bone conduction sound device can be applied in a smaller space field. like dentures. In addition, the volume of the bone conduction sound-emitting device can also be reduced, thereby reducing the weight of the packaging shell thereof, so as to reduce the oppression of the bone-conduction sound-emitting device to the user and improve the user experience. Therefore, the bone conduction sound-generating device provided in this embodiment solves the problem that because the vibration element 20 occupies a large space in its external packaging structure, the volume of the external packaging structure is large, which eventually leads to a large volume of the bone conduction sound-emitting device, so it cannot be The technical problem of applying bone conduction sound-generating equipment to a smaller space.

In order to verify that disposing the elastic element 201 between the first vibrating element 202 and the second vibrating element 203 occupies a smaller volume than disposing the elastic element 201 on the side of the vibrating element 20 away from the driving element 30, this embodiment will combine Figures 5-10 carry out volume comparison calculations and elaborations. In the comparison calculation, the same device has the same size and performance parameters in each calculation example. The cylindrical volume occupied by the elastic element 201 remains unchanged all the time, and does not participate in the comparison calculation. The calculated volume is the ideal volume.

According to the actual working conditions: thickness of elastic element 201 << thickness of each device and amplitude << radius of each device; set thickness of vibrating element 20 to be 2h (thickness of first vibrating part 202 and second vibrating part 203 to be h), thickness of driving element 30 and the amplitude are h, h>0; the height of the upper frustum, that is, the height of the space above the elastic element 201, is _Hu , and the height of the lower frustum, that is, the height of the space below the elastic element 201, is _Hd ; the radius of the elastic element 201, R ₁ , The drive element 30 has a radius R ₂ , the vibration element 20 has a radius R ₃ , and R ₁ >R ₂ >R ₃ >0 or R ₁ >R ₃ >R ₂ >0.

5 is an implementation manner in which the elastic element 201 is arranged between the first vibrating member 202 and the second vibrating member 203 in this embodiment, and R ₁ >R ₂ >R ₃ >0; FIG. 6 is the vibration of FIG. 5 Operation diagram of element 20 at maximum amplitude;

7 is an implementation manner in which the elastic element 201 corresponding to FIG. 5 is disposed on the side of the vibrating element 20 away from the driving element 30 and R ₁ >R ₂ >R ₃ >0, and FIG. 8 is the vibrating element 20 in FIG. 7 . Working diagram at maximum amplitude;

Fig. 5 The ideal volume of the upper frustum: V _u10 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _u10 /3, where H _u10 =2h

Fig. 5 The ideal volume of the lower frustum: V _d10 =π(R ₁ ² +R ₁ R ₂ +R ₂ ² )H _d10 /3, where H _d10 =2h

Figure 7 The ideal volume of the upper frustum: V _u1 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _u1 /3, where H _u1 =h

Figure 7 The ideal volume of the lower frustum: V _d1 =π(R ₁ ² +R ₁ R ₂ +R ₂ ² )H _d1 /3, where H _d1 =3h

Using the ideal total volume of the two frustums in Figure 5, subtract the ideal total volume of the two frustums in Figure 7:

Since R ₁ >R ₂ >R ₃ >0

So R ₃ -R ₂ <0

And R ₁ +R ₂ +R ₃ > 0, h > 0

So (V _u10 +V _d10 )-(V _u1 +V _d1 )<0

That is, it can be known from the above derivation that the ideal total volume of the two truncated cones in FIG. 5 is smaller than the ideal total volume of the two truncated cones corresponding to FIG. 7 . And when the transducer unit in Fig. 5 and Fig. 7 is at the maximum amplitude, that is, as shown in Fig. 6 and Fig. 8 : the upper surface of the vibrating element 20 (that is, the first vibrating member 202) in Fig. 6 will be in close contact with the upper surface of the upper frustum. , the edge deformation of the elastic element 201 is still in the ideal envelope, so the actual volume is the ideal volume. In Fig. 8, the middle of the elastic element 201 will be close to the upper surface of the upper frustum, the radius of the elastic element 201 is the largest, and the edge of the elastic element 201 is deformed and protrudes beyond the ideal envelope. Part of the volume is the desired actual volume of Figure 8, so the actual volume of Figure 8 will be larger than its ideal volume. It is further deduced that the actual volume of FIG. 5 is smaller than that of FIG. 7 .

Optionally, FIG. 9 shows another implementation manner in which the elastic element 201 is arranged between the first vibrating member 202 and the second vibrating member 203 and R ₁ >R ₃ >R ₂ >0; wherein FIG. 10 is the same as FIG. 9 . Another implementation in which the corresponding elastic element 201 is arranged on the side of the vibrating element 20 facing away from the driving element 30 and R ₁ >R ₃ >R ₂ >0.

Fig. 9 The ideal volume of the upper frustum: V _u20 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _u20 /3, where H _u20 =2h

Fig. 9 Ideal volume of lower frustum: V _d20 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _d20 /3, where H _d20 =2h

Fig. 10 The ideal volume of the upper frustum: V _u2 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _u2 /3, where H _u2 =h

Figure 10 The ideal volume of the lower frustum: V _d2 =π(R ₁ ² +R ₁ R ₃ +R ₃ ² )H _d2 /3, where H _d2 =3h

Using the ideal total volume of the two frustums in Figure 9, subtract the ideal total volume of the two frustums in Figure 10

That is, the ideal total volume of the two frustums in Fig. 9 is equal to the ideal total volume of the two frustums in Fig. 10 . When Fig. 9 and Fig. 10 are at the maximum amplitude, the upper surface of the vibrating element 20 (ie, the first vibrating member 202) in Fig. 9 will be in close contact with the upper surface of the upper frustum, and the edge deformation of the elastic element 201 is still in the ideal envelope, So the actual volume is the ideal volume. In FIG. 10 , the middle part of the elastic element 201 will be in close contact with the upper surface of the upper frustum, and the deformation of the edge of the elastic element 201 will protrude beyond the ideal envelope, so the actual volume will be larger than the ideal volume. So the actual volume of FIG. 9 is smaller than the actual volume of FIG. 10 .

To sum up, it can be deduced that the volume occupied by the elastic element 201 disposed between the first vibrating element 202 and the second vibrating element 203 is smaller than that of disposing the elastic element 201 on the side of the vibrating element 20 away from the driving element 30 . Since the implementation of the above-mentioned transducer unit includes one driving element 30 is the most basic implementation, when there are multiple driving elements 30 , the above calculation and derivation process is still applicable, so it is not repeated here.

Further, the driving element 30 may be fixed on the inner top wall or/and the inner bottom wall of the vibration space. Exemplarily, the driving element 30 may be one, and the driving element 30 may be fixed on the inner top wall or the inner bottom wall of the vibration space. Of course, the number of driving elements 30 can also be two, and the driving elements 30 can be respectively fixed on the inner top wall and the inner bottom wall of the vibration space, that is, one of the driving elements 30 is fixed on the inner top wall of the vibration space, and the other is driven The element 30 is fixed on the inner bottom wall of the vibration space. Alternatively, the two driving elements 30 are both fixed on the inner top wall or the inner bottom wall of the vibration space, that is, the two driving elements 30 are fixed on the inner top wall of the vibration space at the same time, or the two driving elements 30 are fixed on the vibration space at the same time. on the inner bottom wall of the space.

The transducer unit in this embodiment can be implemented in multiple ways, which are specifically described as follows:

Referring to FIG. 1 , in an implementation manner of the transducer unit in this embodiment, there may be one driving element 30 , the driving element 30 is a coil, and the first vibrating member 202 and the second vibrating member 203 are both magnets. The function of the transducer unit is to convert electrical energy into a magnetic field through the coil, and the energized coil generates a magnetic field, which generates a magnetic force with the magnet, so the magnetic force occurs between the driving element 30 and the first vibrating member 202 and the second vibrating member 203, so that the first The vibrating element 202 and the second vibrating element 203 generate vibration signals, which are transmitted to the external structure 10 through the elastic element 201 and the driving element 30, and further transmitted to the human body. The electrical signal sent by the controller is used to adjust the strength of the magnetic field, so that the vibration signal also changes accordingly, so that the electrical signal sent by the controller is converted into a vibration signal carrying sound, that is, vibration and sound are realized.

Optionally, there may be one driving element 30 , and the driving element 30 is a coil, and both the first vibrating member 202 and the second vibrating member 203 are coils. The energized driving element 30 generates a magnetic field, and at the same time, the first vibrating member 202 and the second vibrating member 203 are also energized to generate a magnetic field, and the two magnetic fields interact to realize vibration and sound. elaboration, and will not be repeated here.

Optionally, there may be one driving element 30, and the driving element 30 is a coil, one of the first vibrating member 202 and the second vibrating member 203 is a coil, and the other of the first vibrating member 202 and the second vibrating member 203 is a coil. One is a magnet. Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

Optionally, there may be one driving element 30, and the driving element 30 is a coil, one of the first vibrating member 202 and the second vibrating member 203 is a coil, and the other of the first vibrating member 202 and the second vibrating member 203 is a coil. One is a non-magnetic ferromagnetic solid. Among them, ferromagnetic solids are substances that are not originally magnetic, and can be magnetized under the action of a magnetic field to have magnetic properties. The reason why ferromagnetic solids can be magnetized is because ferromagnetic solids are composed of many small magnetic regions called magnetic domains. Each magnetic domain is equivalent to a small magnet. When there is no external magnetic field, the magnetic domains are arranged in disorder. , the magnetism cancels each other out, and the magnetism is not obvious to the outside. However, under the action of the external magnetic field, the magnetic domains will be aligned along the direction of the magnetic field to form an additional magnetic field, thereby significantly enhancing the magnetic field. The coil in the vibration element 20 is energized to generate a magnetic field, which magnetizes the ferromagnetic solid connected to it through the elastic element 201, and the magnetic field of the vibration element 20 is significantly enhanced. Due to the interaction between the magnetic fields, a magnetic force occurs between the driving element 30 and the vibrating element 20, so that the vibrating element 20 exerts pressure on the external structure 10 through the elastic element 201 to realize vibration and sound.

Optionally, there can be one driving element 30, and the driving element 30 is a coil, the first vibrating member 202 and the second vibrating member 203 are both non-magnetic ferromagnetic solids, and the coil of the driving element 30 is energized to generate a magnetic field, and at the same time magnetize With the two ferromagnetic solids in the vibration element 20, the magnetism of the vibration element 20 is significantly enhanced, and the vibration element 20 and the driving element 30 produce the interaction between the magnetic fields, so the magnetic force occurs between the driving element 30 and the vibration element 20. The vibration element 20 generates a vibration signal, which is transmitted to the external structure 10 through the elastic element 201 and the driving element 30, and further transmitted to the human body.

Please continue to refer to FIG. 2 , in another implementation manner of the transducer unit in this embodiment, there is one driving element 30 , the driving element 30 is a magnet, and the first vibrating member 202 and the second vibrating member 203 are both coils. The energized first vibrating member 202 and the second vibrating member 203 generate a magnetic field, which generates a magnetic force with the driving element 30 of the magnet, thereby realizing vibration and sound generation.

Optionally, there is one driving element 30, and the driving element 30 is a non-magnetic ferromagnetic solid, and the first vibrating member 202 and the second vibrating member 203 are both coils. The energized first vibrating member 202 and the second vibrating member 203 generate a magnetic field, which magnetizes the ferromagnetic solid in the driving element 30, the magnetic field of the driving element 30 increases significantly, and the vibrating element 20 and the driving element 30 generate a magnetic force, thereby realizing vibration The working principle of uttering has been clarified in the above-mentioned implementation manner, and will not be repeated here.

In some implementations of the transducer unit, the number of the driving elements 30 is two, the two driving elements 30 are the first driving element 301 and the second driving element 302 respectively, and the first driving element 301 is located away from the first vibrating member 202 On one side of the elastic element 201 , the second driving element 302 is located on the side of the second vibrating element 203 away from the elastic element 201 . The first driving element 301 and the second driving element 302 share one vibration element 20 . The first driving element 301 and the vibrating element 20 can form one transducer unit, and the second driving element 302 and the vibrating element 20 can form another transducer unit. The element 30 turns one transducer unit into two transducer units, which not only saves the manufacturing cost, but also reduces the package volume and the weight of the external package structure, so that the bone conduction sound device can be applied in a smaller space and reduce the The sense of oppression caused to the user improves the user experience.

It will be appreciated that each transducer element includes at least one distinct frequency response range. Since each transducer unit includes at least a coil and a magnet or a coil or a ferromagnetic solid, the weight, size, and material of the magnet, the gap between the magnet and the coil, the gap between the ferromagnetic solid and the coil, and the Parameters such as material, number of turns, and the gap between the coils make the two transducer units in the same internal vibration space have different frequency characteristics. The two transducer units can work independently, that is, when one of the transducer units is working, the sound-generating structure shows the frequency characteristics of the working transducer unit, and the sound-generating structure can output vibration signals generated by the two transducer units respectively. When the two transducer units work together, the range of the vibration signal output by the sound-generating structure is the superposition of the range of the vibration signal generated by the two transducer units, which can improve the sound quality of the bone conduction sound-generating device and widen the frequency domain of the audio.

Of course, the number of driving elements 30 may be other numbers, and a plurality of driving elements 30 may share one vibration element 20, thereby reducing the package volume of the sound-emitting structure. Optionally, a plurality of driving elements 30 may also be provided one-to-one corresponding to one vibration element 20 or each two driving elements 30 may be provided with one vibration element 20 shared.

Further, the first driving element 301 and the second driving element 302 are both coils, and the first vibrating member 202 and the second vibrating member 203 are both coils. The first driving element 301 is energized to generate a magnetic field, the first vibrating element 202 and the second vibrating element 203 are also energized to generate a magnetic field, a magnetic force occurs between the first driving element 301 and the vibrating element 20, and the vibration signal transmitted by the sounding structure is related to the first driving element. The element 301 is related to the characteristics of the vibrating element 20 . Alternatively, the second driving element 302 is energized to generate a magnetic field, the first vibrating element 202 and the second vibrating element 203 are also energized to generate a magnetic field, and a magnetic force occurs between the second driving element 302 and the vibrating element 20, and the vibration signal transmitted by the sounding structure is related to the first vibration signal. The two driving elements 302 are related to the characteristics of the vibrating element 20 . Alternatively, the first driving element 301 and the second driving element 302 are both energized to generate a magnetic field, the first vibrating element 202 and the second vibrating element 203 are also energized to generate a magnetic field, and both the first driving element 301 and the second driving element 302 are connected to the vibrating element 20 . There is a magnetic force between them, and the vibration signal transmitted by the sound-emitting structure is related to the characteristics of the first driving element 301 and the second driving element 302 and the vibration element 20 . That is, by setting the coil parameters of the first driving element 301 and the second driving element 302 to be different, the two transducer units formed by them have different frequency response ranges.

In a possible implementation manner, since the first vibrating member 202 and the second vibrating member 203 are both coils, the first vibrating member 202 and the second vibrating member 203 can also be energized separately to generate a magnetic field, which is separately connected to the first driving element. 301 and the second driving element 302 generate an interaction force. At this time, the first driving element 301 and the first vibrating member 202, the first driving element 301 and the second vibrating member 203, and the second driving element 302 and the first vibrating member 202 , the second driving element 302 and the second vibrating element 203 are respectively combined to form four transducing units. That is, by setting the coil parameters of the first vibrating member 202 and the second vibrating member 203 to be different, the four additionally formed transducing units have different frequency response ranges.

Optionally, as shown in FIG. 3 , the first driving element 301 and the second driving element 302 are both coils, and the first vibrating member 202 and the second vibrating member 203 are both magnets. After the first driving element 301 is energized to generate a magnetic field, a magnetic force occurs between the first driving element 301 and the vibrating element 20 , and the vibration signal transmitted by the sounding structure is related to the characteristics of the first driving element 301 and the vibrating element 20 . Alternatively, after the second driving element 302 is energized to generate a magnetic field, a magnetic force occurs between the second driving element 302 and the vibrating element 20 , and the vibration signal transmitted by the sounding structure is related to the characteristics of the second driving element 302 and the vibrating element 20 . Alternatively, after both the first driving element 301 and the second driving element 302 are energized to generate a magnetic field, a magnetic force occurs between the first driving element 301 and the second driving element 302 and the vibration element 20, and the vibration signal transmitted by the sound-emitting structure is related to the first driving element 301 and the second driving element 302. The drive element 301 is related to the characteristics of the second drive element 302 and the vibration element 20 . That is, by setting the coil parameters of the first driving element 301 and the second driving element 302 to be different, the two transducer units formed by them have different frequency response ranges.

Optionally, both the first driving element 301 and the second driving element 302 are coils, one of the first vibrating member 202 and the second vibrating member 203 is a coil, and one of the first vibrating member 202 and the second vibrating member 203 is a coil. The other is a magnet. Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

Optionally, both the first driving element 301 and the second driving element 302 are coils, one of the first vibrating member 202 and the second vibrating member 203 is a coil, and one of the first vibrating member 202 and the second vibrating member 203 is a coil. The other is a non-magnetic ferromagnetic solid. Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

Optionally, the first driving element 301 and the second driving element 302 are both coils, and the first vibrating member 202 and the second vibrating member 203 are both non-magnetic ferromagnetic solids. Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

Please continue to refer to FIG. 4 , another implementation manner of the transducer unit in this embodiment, the first driving element 301 and the second driving element 302 are both magnets, and the first vibrating element 202 and the second vibrating element 203 are both coils . Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

In some implementations of the transducer unit, one of the first driving element 301 and the second driving element 302 is a coil, the other of the first driving element 301 and the second driving element 302 is a magnet, and the first vibrating member 202 and the second vibrating element 203 are both coils; alternatively, one of the first driving element 301 and the second driving element 302 is a coil, and the other one of the first driving element 301 and the second driving element 302 is a non-magnetic iron For a magnetic solid, the first vibrating member 202 and the second vibrating member 203 are both coils. Its working principle has been clarified in the above-mentioned implementation manner, and will not be repeated here.

In this embodiment, when at least one driving element 30 is a coil, the coil has a first space 40 for the first vibrating member 202 or the second vibrating member 203 to vibrate. The vibration element 20 will move back and forth in the vertical direction in the vibration space. When the vibration element 20 moves toward the driving element 30, the vibration element 20 can enter the first space 40. In this way, the first space 40 can replace or partially replace the vibration element. 20 The vibration space required when the driving element 30 vibrates, so the volume of the vibration space can be reduced, thereby reducing the packaging volume and the weight of the external packaging structure, so that the bone conduction sound device can be applied in a smaller space and reduce the impact on the user. The sense of oppression caused, and the user experience is improved.

Alternatively, when at least one driving element 30 is a magnet or a non-magnetic ferromagnetic solid, the first vibrating member 202 and/or the second vibrating member 203 have a second space 50 into which the magnet or the ferromagnetic solid can penetrate. When the driving element 30 interacts with the vibration element 20, the vibration element 20 will move back and forth in the vertical direction in the vibration space. When the vibration element 20 moves toward the driving element 30, the driving element 30 can enter the second space 50. In this way, the second space 50 can replace or partially replace the vibration space required when the vibration element 20 vibrates toward the driving element 30 , so the volume of the vibration space can be reduced, thereby reducing the packaging volume and the weight of the external packaging structure, and the bone can be reduced. Conductive sound-emitting devices are used in smaller spaces to reduce the pressure on users and improve user experience.

Optionally, when at least one of the driving elements 30 is a coil and the vibrating element close to the driving element 30 that is a coil is also a coil, the first space 40 may be provided on the driving element 30 that is a coil, or the vibration of the coil may be used. A second space 50 is provided on the piece.

In this embodiment, the elastic element 201 is a flat elastic member. The thickness of the flat elastic member is very small, which can reduce the volume occupied by the flat elastic member, thereby reducing the package volume. Exemplarily, the elastic element 201 is a rubber sheet, a sound diaphragm or a flat spring.

Further, the elastic element 201 may be a regular shape such as a rectangle, a circle, an ellipse, a cross, a diamond, etc. Of course, the elastic element 201 may also be other irregular shapes, and the shape of the elastic element 201 is not limited in this embodiment. As long as the elastic element 201 can ensure the generation of the vibration signal of the transducer unit. Exemplarily, the elastic element 201 may be a polygon with a small width at both ends and a large width in the middle, and two ends of the elastic element 201 are respectively connected to two opposite side walls of the vibration space. Optionally, the shape of the elastic element 201 may be circular, and the edge of the elastic element 201 may be connected with the inner sidewall of the vibration space. Such arrangement can make the elastic element 201 more fully contact with the inner side wall of the vibration space, and better transmit the vibration of the vibration element 20 . Optionally, the elastic element 201 can also be arranged in a corresponding shape according to the shape of the inner sidewall of the vibration space surrounding the cross section, so that the elastic element 201 is preferably in contact with the inner sidewall of the vibration space. Further, the elastic element 201 may be provided with a hollow pattern.

In this embodiment, there may be multiple transducer units, and the frequency response ranges of the multiple transducer elements are different. When there are at least two transducer units, the frequency response ranges corresponding to each transducer unit may be different, or some of the transducer units may be the same. In order to achieve better sound quality, according to the type of the sound source played and the frequency response range corresponding to the transducer unit, from all the transducer units in the sound-generating structure, determine the transducer unit that matches the type of the sound source, and The matched transducer units are driven to generate vibration signals, so as to play a sound quality effect more in line with the type of the sound source to the user.

In this embodiment, the sound-generating structure, the controller and the functional structure are packaged to form an integrated bone conduction sound-generating device. The encapsulation form of the sound-emitting structure can be that multiple transducer units are integrated and packaged together, or it can be packaged by relying on a functional structure, that is, the sound-emitting structure is embedded in the functional structure, or the functional structure wraps the sound-emitting structure; The encapsulation of the structure can also be a shared encapsulation with the controller, that is, the sound emitting structure is integrated with the controller; the encapsulation of the sound emitting structure can also be integrated with the controller and the functional structure as a package. Through this integration method, it is possible to reduce or even cancel the encapsulation shell of the sound-generating structure, reduce the volume and weight of the device, and reduce the overall weight of the bone conduction sound-generating device to reduce the pressure on the user's wearing part and improve the user experience. Sound quality can also be improved due to the integration of multiple transducer units. At the same time, after the bone conduction sound device is integrated, its volume is greatly reduced, and the bone conduction sound device can be applied in a smaller space.

In this embodiment, the functional structure may be a structure that touches the user's oral cavity or teeth, and after the controller drives the sound-emitting structure to generate a vibration signal, the functional structure may transmit the vibration signal through the user's oral cavity or teeth To the user's auditory system, compared to clipping the bone conduction sounding device behind the ear, the functional structure transmits vibration signals through the inside of the mouth or teeth, and there will be no inconvenience and pressure when wearing it. The user can place the functional structure in the bone conduction sounding device inside the oral cavity, and when it touches the internal tissue of the oral cavity, specifically, the user can hold the functional structure with his mouth, or bite the functional structure, or It is to place the functional structure on one side of the oral cavity, such as the upper jaw or the tongue or the left and right cheek sides of the oral cavity, and then when the controller drives the sound-emitting structure to generate a vibration signal, the functional structure can conduct the vibration signal through bone conduction. transmitted to the auditory system. Exemplary, functional structures may be dentures, dental appliances, pacifiers, molar sticks, chopsticks, spoons, forks, stir sticks, straws, pens, voice recorders, popsicle sticks, toothbrushes, lollipop sticks, electronic cigarettes, cigarette holders or other similar products, as well as accessories of the above-mentioned products, etc., which can be set independently or assembled by several components.

In the bone conduction sound-generating device provided by the embodiment of the present application, the controller drives the sound-generating structure, the driving element 30 in the sound-generating structure interacts with the magnetic field of the vibration element 20, the vibration element 20 exerts pressure on the external structure 10 through the elastic element 201, and the external structure 10 Under the action of pressure, it is deformed, and the magnetic field strength is adjusted by the electric signal sent by the controller, so that the deformation also changes accordingly. Vibration signal, the functional structure can transmit the vibration signal to the user's auditory system through the user's oral cavity or teeth. Compared with the bone conduction sound-emitting device in the prior art, it can be applied in a smaller space. , there will be no inconvenience and oppression when wearing, and it also has technical effects such as simple structure, high integration, and improved sound quality to a certain extent.

In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a The indirect connection through an intermediate medium may be an internal connection between two elements or an interaction relationship between the two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, while It is not necessary to describe a particular order or sequence.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them; It should be understood that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the embodiments of the present application The scope of the technical solutions of each embodiment.

Claims

A bone conduction sounding device, characterized in that it comprises: a controller, a sounding structure and a functional structure;

the sounding structure is connected with the controller and the functional structure, respectively;

The sound-emitting structure includes: an external structure with a vibration space inside, and at least one transducer unit accommodated in the vibration space and capable of vibrating;

The transducer unit includes a vibrating element and at least one driving element, the vibrating element has at least an elastic element, the elastic element is laterally arranged in the vibration space, and two ends of the elastic element are respectively connected to the vibration space. The two opposite inner sidewalls are connected, and the driving element is fixedly arranged near the vibration element in the vibration space;

The vibrating element includes a first vibrating element and a second vibrating element, and the first vibrating element and the second vibrating element are respectively located on both sides of the elastic element and both are connected to the elastic element;

The driving element is disposed adjacent to at least one of the first vibrating member and the second vibrating member.
The bone conduction sounding device according to claim 1, wherein the driving element is fixed on the inner top wall or/and the inner bottom wall of the vibration space.
The bone conduction sounding device according to claim 1, wherein the driving element is one, the driving element is a coil, and the first vibrating member and the second vibrating member are both coils;

Alternatively, both the first vibrating member and the second vibrating member are magnets;

Alternatively, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a magnet;

Alternatively, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a non-magnetic ferromagnetic solid;

Alternatively, both the first vibrating member and the second vibrating member are non-magnetic ferromagnetic solids.
The bone conduction sounding device according to claim 1, wherein the driving element is one, and the driving element is a magnet or a non-magnetic ferromagnetic solid, the first vibrating member and the second The vibrating elements are all coils.
The bone conduction sounding device according to claim 1, wherein the number of the driving elements is two, and the two driving elements are respectively a first driving element and a second driving element, and the first driving element The second driving element is located on the side of the first vibrating member away from the elastic element, and the second driving element is located at the side of the second vibrating member away from the elastic element.
The bone conduction sounding device according to claim 5, wherein the first driving element and the second driving element are both coils, and the first vibrating member and the second vibrating member are both coils;

Alternatively, both the first vibrating member and the second vibrating member are magnets;

Alternatively, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a magnet;

Alternatively, one of the first vibrating member and the second vibrating member is a coil, and the other one of the first vibrating member and the second vibrating member is a non-magnetic ferromagnetic solid;

Alternatively, both the first vibrating member and the second vibrating member are non-magnetic ferromagnetic solids.
The bone conduction sound producing device according to claim 5, wherein the first driving element and the second driving element are both magnets, and the first vibrating member and the second vibrating member are both coils.
The bone conduction sounding device according to claim 5, wherein one of the first driving element and the second driving element is a coil, and the other one of the first driving element and the second driving element is a magnet or a non-magnetic ferromagnetic solid, the first vibrating member and the second vibrating member are both coils.
The bone conduction sound producing device according to any one of claims 1-8, wherein when the at least one driving element is a coil, the coil has a function for the first vibrating member or the second vibrating member to vibrate the first space,

Alternatively, when the at least one driving element is a magnet or a non-magnetic ferromagnetic solid, the first vibrating member and/or the second vibrating member have a second space.
The bone conduction sounding device according to any one of claims 1-9, wherein the elastic element is a flat elastic member.
The bone conduction sound producing device according to any one of claims 1-10, wherein the elastic element is a rubber sheet, a sound membrane or a flat spring.
The bone conduction sound producing device according to any one of claims 1-11, wherein there are multiple transducing units, and the frequency response ranges of the multiple transducing elements are different;

Alternatively, each of the transducing elements includes at least one different frequency response range.
The bone conduction sound producing device according to any one of claims 1-12, wherein the sound producing structure, the controller and the functional structure are packaged to form an integrated bone conduction sound producing device.