CN215420667U

CN215420667U - Bone conduction sound generating device and wearable equipment

Info

Publication number: CN215420667U
Application number: CN202120986916.4U
Authority: CN
Inventors: 曹洪斌
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-01-04
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a bone conduction sound production device and wearable equipment, wherein the bone conduction sound production device comprises an external packaging structure, a hollow cavity is arranged in the external packaging structure, and the hollow cavity is internally provided with: hollowing out the elastic sheet; the exciter comprises an upper magnetic part, a lower magnetic part and an upper magnetic bowl connected with the upper magnetic part, wherein the upper magnetic part and the lower magnetic part are parallel and opposite in the Z-axis direction and are arranged in a mutually isolated manner; the surface area of the bottom of the upper magnetic bowl is smaller than that of the bottom of the upper magnetic part, the exciter is connected to the hollowed-out elastic sheet through the upper magnetic bowl, and the hollowed-out elastic sheet and the upper magnetic bowl are matched to adjust the effective vibration area of the hollowed-out elastic sheet so as to adjust the resonance frequency point of the device. Install above-mentioned bone conduction sound generating mechanism's wearable equipment, can transmit low frequency signal and transmit the amplitude moderate, balanced whole sound audio frequency section reaches better acoustic effect, shows to promote user experience and product tone quality.

Description

Bone conduction sound generating device and wearable equipment

Technical Field

The utility model relates to the technical field of bone conduction sounding, in particular to a bone conduction sounding device and wearable equipment.

Background

Bone conduction is a sound conduction mode, that is, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ and the auditory center of a human body. Compared with the traditional sound conduction mode of generating sound waves through a sound film, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air.

The earphone manufactured by applying the bone conduction sounding technology is called as follows: bone conduction earphone, the conduction of its sound wave is different with ordinary pleasant formula, does not need the vibration of eardrum, but directly passes to auditory nerve through the bone, has both improved the travelling comfort, has protected user's hearing again, can also make the user directly hear external sound clearly, has its unique superiority, but current bone conduction earphone has following defect:

the bone conduction sound generating device applied to the existing bone conduction earphone can generate larger vibration amplitude when conducting low-frequency signals, and has stronger vibration sense when in use, thereby influencing the customer experience. Therefore, in order to overcome the above defects, in practical application, the ear phone directly shields the low frequency signal, so that although the vibration sense is reduced, the sound transmitted to the ear lacks a bass part, the sound quality is not high, and the experience sense of the customer is also influenced. Therefore, the research on the bone conduction sounding device which has rich low-frequency content and improves the low-frequency tone quality and sound effect is significant.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bone conduction sounding device and wearable equipment, which can transmit low-frequency signals and moderate amplitude and balance the whole voice frequency section.

In order to solve the above technical problem, on one hand, the utility model provides a bone conduction sound generating device, which includes an external packaging structure, wherein a hollow cavity is arranged in the external packaging structure, and the hollow cavity is internally provided with:

hollowing out the elastic sheet;

the exciter comprises an upper magnetic part, a lower magnetic part and an upper magnetic bowl connected with the upper magnetic part, and the upper magnetic part and the lower magnetic part are opposite in parallel in the Z-axis direction and are arranged in an isolated manner;

the surface area of the bottom of the upper magnetic bowl is smaller than that of the bottom of the upper magnetic part, the exciter is connected to the hollowed-out elastic sheet through the upper magnetic bowl, and the hollowed-out elastic sheet and the upper magnetic bowl are matched to adjust the effective vibration area of the hollowed-out elastic sheet so as to adjust the resonance frequency point of the device.

Preferably, the hollowed-out elastic piece comprises an inner elastic piece, an outer elastic piece sleeved outside the inner elastic piece, and a plurality of connecting elastic pieces connected between the inner elastic piece and the outer elastic piece, the outer elastic piece is embedded on the external packaging structure, the inner elastic piece is connected to the upper magnetic bowl, the bottom surface of the upper magnetic bowl is smaller than or equal to the surface area of the inner elastic piece, the upper magnetic bowl adjusts the hollowed-out elastic piece to be stacked with the framework of the exciter in the Z-axis direction, and adjusts the gap between the upper magnetic piece and the lower magnetic piece.

Preferably, the exciter further comprises a lower magnetic bowl for accommodating the lower magnetic part, the upper magnetic part is connected to the inner elastic piece through the upper magnetic bowl, and the lower magnetic part is connected to the bottom of the hollow cavity through the lower magnetic bowl.

Preferably, the magnetic flux of the upper magnetic member is greater than or equal to the magnetic flux of the lower magnetic member, the upper magnetic member and the lower magnetic member are arranged in a homopolar and opposite manner, and when the upper magnetic member and the lower magnetic member are not electrified, the repulsive force between the upper magnetic member and the lower magnetic member is equal to the attractive force between the upper magnetic member and the lower magnetic bowl so as to keep the static balance of magnetic force.

Preferably, the exciter further comprises a coil arranged in the lower magnetic bowl and surrounding the lower magnetic part, and a flexible circuit board arranged between the coil and the lower magnetic bowl, wherein one end of the flexible circuit board is connected with the coil, and the other end of the flexible circuit board extends out of the external packaging structure.

Preferably, the bottom surface area of the lower magnetic bowl is greater than or equal to the bottom surface area of the upper magnetic bowl.

Preferably, the upper magnetic member includes at least one magnet and/or the lower magnetic member includes at least one magnet.

Preferably, the gap is filled with one or more of air, damping material and elastic member.

Preferably, the external packaging structure comprises a shell provided with a hollow cavity and a cover plate covered on the shell, and the hollowed-out elastic sheet is embedded in the shell and arranged opposite to the cover plate.

On the other hand, the utility model further provides wearable equipment comprising the bone conduction sounding device.

Compared with the prior art, the utility model has the following advantages:

(1) the upper magnetic bowl with the bottom surface area smaller than that of the upper magnetic part is connected with the hollowed-out elastic sheet and the exciter, the hollowed-out elastic sheet is matched with the upper magnetic bowl to adjust the effective vibration area of the hollowed-out elastic sheet so as to adjust the resonance frequency point of the device, the hollowed-out elastic sheet and the framework of the exciter in the Z-axis direction are adjusted by the upper magnetic bowl to stack, and the gap between the upper magnetic part and the lower magnetic part is adjusted, so that the amplitude of a sound signal transmitted by the sound generating device is moderate, simultaneously, a low-pitch part can be synchronously transmitted to an auditory canal, the whole sound frequency section is balanced, a better acoustic effect is achieved, and the user experience and the product sound quality are remarkably improved.

(2) The exciter completely utilizes the magnetic force balance to achieve the static balance among all the parts through the upper magnetic part and the lower magnetic part which are oppositely arranged in the same pole, does not need an additional supporting structure, and has simple structure, easy realization and reduced production cost.

(3) The cover plate is arranged on the external packaging structure through the cover, so that the strength of the whole device is enhanced, a good sound insulation effect is achieved, and the sound leakage phenomenon is effectively prevented.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the utility model as a matter of case. In the drawings:

fig. 1 is an exploded view of a bone conduction sound generating device of the present invention;

fig. 2 is a cross-sectional view of a bone conduction sound generating device of the present invention;

fig. 3 is a schematic structural view of the hollowed-out elastic sheet of the present invention.

Shown in the figure:

11. a hollow cavity; 12. a housing; 121. mounting grooves; 13. a cover plate; 2. hollowing out the elastic sheet; 21. an inner spring plate; 22. an outer spring plate; 23. connecting the elastic sheets; 31. an upper magnetic member; 32. a lower magnetic member; 33. an upper magnetic bowl; 34. a lower magnetic bowl; 35. an isolation region; 36. a coil; 37. a flexible circuit board.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, a bone conduction sound generating device according to a preferred embodiment of the present invention includes an external packaging structure, a hollow cavity 11 is formed in the external packaging structure, and a hollow elastic sheet 2 and an actuator are disposed in the hollow cavity 11. The exciter comprises an upper magnetic part 31, a lower magnetic part 32 and an upper magnetic bowl 33 connected with the upper magnetic part 31, wherein the upper magnetic part 31 and the lower magnetic part 32 are opposite in parallel in the Z-axis direction and are arranged in a mutually isolated mode to form an isolation area 35; in this embodiment, the hollowed-out elastic piece 2 is embedded in the external packaging structure along the circumferential direction, the bottom surface area of the upper magnetic bowl 33 is smaller than the bottom surface area of the upper magnetic part 31, the exciter is connected to the hollowed-out elastic piece 2 through the upper magnetic bowl 33, and the hollowed-out elastic piece 2 and the upper magnetic bowl 33 are matched to adjust the effective vibration area of the hollowed-out elastic piece so as to adjust the resonance frequency point of the device.

Further, in the embodiment, the hollowed-out elastic sheet includes an inner elastic sheet 21, an outer elastic sheet 22 sleeved outside the inner elastic sheet 21, and a plurality of connecting elastic sheets 23 connected between the inner elastic sheet 21 and the outer elastic sheet 22, the outer elastic sheet 22 is embedded in the external packaging structure, the inner elastic sheet 21 is connected to the upper magnetic bowl 33, preferably, the bottom surface of the upper magnetic bowl 33 is smaller than or equal to the surface area of the inner elastic sheet 21, the upper magnetic bowl 33 adjusts the frame stack of the hollowed-out elastic sheet and the exciter in the Z-axis direction, and adjusts the gap between the upper magnetic member 31 and the lower magnetic member 32. The inner spring 21, the connecting spring 23 and the upper magnetic bowl 33 are matched to adjust the effective vibration area of the hollowed-out spring so as to adjust the resonance frequency point of the device. Specifically, under the unchangeable condition of the whole size of fretwork shell fragment 2, thickness, material, the length and width and the area of shell fragment 21 in changing, and then the length and the area of the connection shell fragment 23 between shell fragment 21 and the outer shell fragment 22 in changing, the length and the area of connecting shell fragment 23 are the effective vibration area of this fretwork spring promptly to change the resonant frequency point F0 of system, nimble adjustment low frequency effect, the resonant frequency point can reach 80Hz least. Simultaneously, it also can change along with the change of interior shell fragment 21 length and width and area to go up magnetic bowl 33, because F0 changes and can lead to the amplitude change, so should go up magnetic bowl 33's height also need do corresponding adjustment, the Z direction that completely connects fretwork shell fragment 2 and last magnetic part 31 is piled up, adjust the clearance between the upper and lower magnetic part simultaneously, the sound signal amplitude that makes sound generating mechanism transmit is moderate, simultaneously the bass part can be transferred to the duct in step, the balanced whole sound audio frequency section, reach better acoustic effect, user experience and product tone quality are promoted remarkably.

The exciter further includes a lower magnetic bowl 34 accommodating the lower magnetic member 32, a coil 36 mounted within the lower magnetic bowl 34 and disposed around the lower magnetic member 32, and a flexible circuit board 37 disposed between the coil 36 and the lower magnetic bowl 34. The upper magnetic part 31 is connected to the inner spring plate 21 through an upper magnetic bowl 33, and the lower magnetic part 32 is connected to the bottom of the hollow cavity through a lower magnetic bowl 34. Specifically, go up magnetic part 31 and connect on last magnetic bowl 33, coil 36 produces different magnetic fields after the circular telegram and cooperates with last magnetic part 31 and provide drive power for the vibration of fretwork shell fragment 2, goes up magnetic part 31 and directly pastes and connect on last magnetic bowl 33, goes up no clearance cooperation between magnetic part 31 and the last magnetic bowl 33, compares with traditional exciter, need not to reserve the insertion space of voice coil loudspeaker voice coil, reduces whole sound generating mechanism's volume. Preferably, the upper magnetic member 31 includes at least one magnet, which may be a single magnet or a plurality of magnets stacked and spliced together. Lower magnetic part 32 is installed in lower magnetic bowl 34, goes up magnetic part 31 and the repulsion between the magnetic part 32 down and has offset the attraction between magnetic part 31 and the lower magnetic bowl 34, makes the exciter be in magnetic force static balance when not circular telegram, avoids fretwork shell fragment 2 to produce the internal stress, utilizes magnetic force balance to reach the static balance between each part completely, need not extra bearing structure, simple structure easily realizes reduction in production cost. Preferably, the lower magnetic member 32 includes at least one magnet, which may be a single magnet or a plurality of magnets stacked and spliced together. The coil 36 is mounted within the lower magnetic bowl 34 and disposed around the lower magnetic member 32. Preferably, the hollow area of the coil 36 is smaller than or equal to the area of the upper magnetic part 31 corresponding to the coil 36, the area of the lower magnetic part 32 is smaller than the area of the hollow part of the coil 36, the surface area of the bottom of the lower magnetic bowl 34 is larger than or equal to the surface area of the bottom of the lower magnetic bowl 34, and the magnetic flux of the lower magnetic part 32 is smaller than or equal to the magnetic flux of the upper magnetic part 31, where the magnetic flux can be changed by changing the volume or material of the magnetic part. The flexible circuit board 37 is disposed between the coil 36 and the lower magnetic bowl 34, and one end of the flexible circuit board is connected to the coil 36, and the other end of the flexible circuit board extends out through the lower magnetic bowl 34 and the housing 12 to be connected to the terminal device. The upper magnetic part 31 and the lower magnetic part 32 are oppositely arranged in the same pole, and when the power is not on, the repulsion force between the upper magnetic part 31 and the lower magnetic part 32 is equal to the attraction force between the upper magnetic part 31 and the lower magnetic bowl 34 so as to achieve the static balance of magnetic force, avoid the hollow elastic sheet 2 from generating internal stress, and achieve the optimal fidelity effect. When the coil 36 is electrified, the static balance of the magnetic force is broken, and the upper magnetic bowl 33 arranged on the hollow elastic sheet 2 moves up and down to drive the hollow elastic sheet 2 to vibrate up and down. It should be noted that the isolation area 35 between the upper magnetic element 31 and the lower magnetic element 32 is always present no matter how the upper magnetic bowl 33 moves up and down, i.e. when the amplitude of the downward vibration of the upper magnetic bowl 33 or the lower magnetic bowl 34 is maximum, the upper magnetic element 31 will not contact with the lower magnetic element 32 and the coil 36 to hinder the movement.

Preferably, the isolation area 35 is filled with one or more of air, damping material, and other elastic members, such as magnetic liquid, foam, spring, etc.

The external packaging structure comprises a shell 12 provided with a hollow cavity 11 and a cover plate 13 arranged on the shell 12 in a covering mode, and the hollow elastic sheet 2 is embedded in the shell 12 and arranged opposite to the cover plate 13. For further better fixed fretwork shell fragment 2, shell 12 is provided with mounting groove 121 at the open end of cavity 11, and outer shell fragment 22 is installed in mounting groove 121, goes up magnetic part 31 and connects on inner shell fragment 21 through last magnetism bowl 33, and connects shell fragment 23 and last magnetic part 31 phase separation all the time, guarantees that fretwork shell fragment 2 can produce the vibration.

In order to further ensure the strength of the whole sound generating device and the sound insulation effect, the cover plate 13 is covered on the mounting groove 121, and the cover plate 13 is matched with the mounting groove 121 and seals the hollow cavity 11. The cover plate 13 is preferably made of metal materials, the rigidity is good, deformation is avoided, the distance between the cover plate 13 and the hollow elastic piece 2 is larger than the maximum working vibration displacement of the hollow elastic piece 2, vibration can be ensured to be carried out normally, the cover plate 13 is arranged on the external packaging structure through the cover, the strength of the whole device is enhanced, a good sound insulation effect is achieved, and sound leakage is effectively prevented.

The embodiment of the utility model also provides wearable equipment which is provided with the bone conduction sound production device, can be earphones, wearable glasses, AR, MR and the like, can transmit low-frequency signals, has moderate transmission amplitude and balances the whole voice frequency band.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the applicants be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. The utility model provides a bone conduction sound generating mechanism, includes outside packaging structure, be provided with the cavity in the outside packaging structure, its characterized in that, be provided with in the cavity:

hollowing out the elastic sheet;

2. The bone conduction sound production device according to claim 1, wherein the hollowed-out elastic piece comprises an inner elastic piece, an outer elastic piece sleeved outside the inner elastic piece, and a plurality of connecting elastic pieces connected between the inner elastic piece and the outer elastic piece, the outer elastic piece is embedded on the external packaging structure, the inner elastic piece is connected to the upper magnetic bowl, the bottom surface of the upper magnetic bowl is smaller than or equal to the surface area of the inner elastic piece, the upper magnetic bowl adjusts the hollowed-out elastic piece to be stacked with the framework of the exciter in the Z-axis direction, and adjusts the gap between the upper magnetic piece and the lower magnetic piece.

3. The bone conduction sound generator of claim 2, wherein the actuator further comprises a lower magnetic bowl for accommodating the lower magnetic element, the upper magnetic element is connected to the inner elastic piece through an upper magnetic bowl, and the lower magnetic element is connected to the bottom of the hollow cavity through a lower magnetic bowl.

4. The bone conduction sound production device according to claim 3, wherein the magnetic flux of the upper magnetic member is greater than or equal to the magnetic flux of the lower magnetic member, the upper magnetic member and the lower magnetic member are arranged in a homopolar and opposite manner, and when the upper magnetic member and the lower magnetic member are not electrified, the repulsive force between the upper magnetic member and the lower magnetic member is equal to the attractive force between the upper magnetic member and the lower magnetic bowl so as to keep the magnetic force static balance.

5. The bone conduction sound generator of claim 3, wherein the actuator further comprises a coil mounted in the lower magnetic bowl and disposed around the lower magnetic member, and a flexible circuit board disposed between the coil and the lower magnetic bowl, one end of the flexible circuit board being connected to the coil, and the other end of the flexible circuit board extending outside the external packaging structure.

6. The bone conduction sound generator of claim 3, wherein a bottom surface area of the lower magnetic bowl is greater than or equal to a bottom surface area of the upper magnetic bowl.

7. The bone conduction sound emitting device of claim 1, wherein the upper magnetic member comprises at least one magnet and/or the lower magnetic member comprises at least one magnet.

8. The bone conduction sound emitting device of claim 2, wherein the gap is filled with air or a damping material.

9. The bone conduction sound-generating device according to claim 1, wherein the external packaging structure comprises a housing configured with a hollow cavity and a cover plate covering the housing, and the hollow elastic sheet is embedded in the housing and disposed opposite to the cover plate.

10. A wearable device comprising the bone conduction sound emitting apparatus of any one of claims 1 to 9.