CN214381340U - Bone conduction sound generating device and wearable equipment - Google Patents

Abstract

The utility model discloses a bone conduction sound generating mechanism and wearable equipment, wherein bone conduction sound generating mechanism includes outside packaging structure, is provided with the cavity in the outside packaging structure, is provided with in the cavity: hollowing out the elastic sheet; the exciter comprises an upper magnetic part and a lower magnetic part, wherein the upper magnetic part and the lower magnetic part are oppositely arranged in parallel in the Z-axis direction and have a gap to form an isolation region; the space low-frequency adjusting plate is arranged between the hollowed-out elastic piece and the exciter, the space low-frequency adjusting plate adjusts the hollowed-out elastic piece to be stacked with the framework of the exciter in the Z-axis direction, the gap of the isolation area is adjusted, and the hollowed-out elastic piece and the space low-frequency adjusting plate 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. 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, is showing promotion user experience and product tone quality.

Description

Bone conduction sound generating device and wearable equipment

Technical Field

The utility model relates to a bone conduction sound production technical field, in particular to bone conduction sound generating mechanism and a 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 at providing a bone conduction sound generating mechanism and a wearable equipment, can transmit low frequency signal and transmit the amplitude moderate, balanced whole sound audio frequency section.

In order to solve the technical problem, on the one hand the utility model discloses a technical scheme is:

the utility model provides a bone conduction sound generating mechanism, includes outside packaging structure, be provided with the cavity in the outside packaging structure, be provided with in the cavity:

hollowing out the elastic sheet;

the exciter comprises an upper magnetic part and a lower magnetic part, wherein the upper magnetic part and the lower magnetic part are oppositely arranged in parallel in the Z-axis direction, and a gap exists to form an isolation region;

the space low-frequency adjusting plate is arranged between the hollowed-out elastic sheet and the exciter, adjusts the hollowed-out elastic sheet and the framework of the exciter in the Z-axis direction to be stacked, and adjusts the gap of the isolation area so as to adjust the resonance frequency point of the device.

Preferably, the magnetic flux of the lower magnetic member is less than or equal to the magnetic flux of the upper magnetic member, the exciter further comprises an upper magnetic bowl accommodating the upper magnetic member and a lower magnetic bowl accommodating the lower magnetic member, the upper magnetic member and the lower magnetic member are arranged in a homopolar and opposite manner, and in a non-energized state, 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, thereby achieving the optimal fidelity effect.

Preferably, the exciter further comprises a coil mounted in the lower magnetic bowl and disposed around the lower magnetic member.

Preferably, the exciter further comprises a flexible circuit board, the flexible circuit board is arranged between the coil and the lower magnetic bowl, 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 lower magnetic bowl is installed at the bottom of the hollow cavity, and the upper magnetic bowl is connected with the space low-frequency adjusting plate.

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 isolation area is filled with one or more of air, damping material and elastic piece.

Preferably, the hollowed-out elastic sheet comprises an inner elastic sheet, an outer elastic sheet and a plurality of connecting elastic sheets connected between the inner elastic sheet and the outer elastic sheet, the inner elastic sheet is installed on the space low-frequency adjusting plate, and the outer elastic sheet is installed on the external packaging structure.

Preferably, the external packaging structure comprises a shell 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.

Preferably, the distance between the cover plate and the hollowed-out elastic sheet is larger than the maximum working vibration displacement of the hollowed-out elastic sheet.

On the other hand, the utility model also provides a wearable equipment, including foretell bone conduction sound generating mechanism.

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

(1) the utility model discloses set up space low frequency regulation version before fretwork shell fragment and exciter, effective vibration area through fretwork shell fragment and space low frequency regulation board cooperation regulation fretwork shell fragment is with adjusting device's resonant frequency point, it piles up with the framework of exciter on the Z axle side through space low frequency regulation board adjustment fretwork shell fragment simultaneously, and adjust the clearance of isolation region, the sound signal range that makes sound generating mechanism transmit is moderate, the bass part can transmit the duct in step simultaneously, balanced whole sound audio frequency section, reach better acoustic effect, user experience and product tone quality are promoted to showing.

(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 helping 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. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:

fig. 1 is an exploded view of the bone conduction sound generator of the present invention;

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

FIG. 3 is a schematic structural view of a hollow-out spring plate of the present invention;

fig. 4 is a schematic structural diagram of the upper magnetic member according to an embodiment of the present invention.

Shown in the figure:

11. a hollow cavity; 12. a housing; 13. a cover plate; 14. mounting grooves; 2. hollowing out the elastic sheet; 21. an inner spring plate; 22. an outer spring plate; 23. connecting the elastic sheets; 3. a spatial low frequency adjustment plate; 41. an upper magnetic member; 41a, a first magnet; 41b, a second magnet; 42. a lower magnetic member; 43. an isolation region; 44. an upper magnetic bowl; 45. a lower magnetic bowl; 46. a coil; 47. a flexible circuit board.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope 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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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 and fig. 2, the bone conduction sound generating device according to a preferred embodiment of the present invention includes an external packaging structure, a hollow-out elastic piece 2, a spatial low frequency adjustment plate 3, and an exciter. A hollow cavity 11 is arranged in the external packaging structure, and the hollow elastic sheet 2, the space low-frequency adjusting plate 3 and the exciter are arranged in the hollow cavity 11. The exciter drives the hollowed-out elastic sheet 2 to vibrate, the exciter comprises an upper magnetic part 41 and a lower magnetic part 42, the upper magnetic part 41 and the lower magnetic part 42 are oppositely arranged in parallel in the Z-axis direction, and a gap exists to form an isolation region 43; the space low-frequency adjusting plate 3 is arranged between the hollowed-out elastic piece 2 and the exciter, the space low-frequency adjusting plate 3 adjusts the hollowed-out elastic piece 2 to be stacked with the framework of the exciter in the Z-axis direction, the gap of the isolation area 43 is adjusted, and the hollowed-out elastic piece and the space low-frequency adjusting plate 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, the exciter further includes an upper magnetic bowl 44 accommodating the upper magnetic member 41, a lower magnetic bowl 45 accommodating the lower magnetic member 42, a coil 46 mounted in the lower magnetic bowl 45 and disposed around the lower magnetic member 42, and a flexible circuit board 47 disposed between the coil 46 and the lower magnetic bowl 45. Go up magnetic bowl 44 and connect on space low frequency regulating plate 3, lower magnetic bowl 45 installs in cavity 11 bottom, and is concrete, go up magnetic part 41 and install in last magnetic bowl 44, coil 46 circular telegram back produce different magnetic fields and last magnetic part 41 cooperation for fretwork shell fragment 2 vibration provides drive power, zero clearance cooperation between the two or only have the fitting space, compare with traditional exciter, need not to reserve the space of inserting of voice coil loudspeaker voice coil, reduce whole sound generating mechanism's volume. The upper magnetic member 41 includes at least one magnet, which may be a whole magnet or a plurality of magnets stacked and spliced together. As shown in fig. 4, in a preferred embodiment, the upper magnetic member 41 includes two magnets, i.e., a first magnet 41a and a second magnet 41b surrounding the first magnet 41 a. The lower magnetic part 42 is arranged in the lower magnetic bowl 45, and the repulsive force between the upper magnetic part 41 and the lower magnetic part 42 offsets the attractive force between the upper magnetic part 41 and the lower magnetic bowl 45, so that the exciter is in magnetic static balance when not electrified, and the hollow elastic sheet 42 is prevented from generating internal stress. The lower magnetic member 42 includes at least one magnet, which may be a single magnet or a plurality of magnets stacked and spliced together. The coil 46 is mounted within the lower magnetic bowl 45 and disposed around the lower magnetic member 42. Preferably, the hollow area of the coil 46 is smaller than or equal to the area of the upper magnetic part 41 corresponding to the coil 46, the area of the lower magnetic part 42 is smaller than the area of the hollow part of the coil 46, the surface area of the bottom of the lower magnetic bowl 45 is larger than or equal to the surface area of the bottom of the lower magnetic bowl 45, and the magnetic flux of the lower magnetic part 42 is smaller than or equal to the magnetic flux of the upper magnetic part 41, where the magnetic flux can be changed by changing the volume or material of the magnetic part. The flexible circuit board 47 is disposed between the coil 46 and the lower magnetic bowl 45, and one end of the flexible circuit board is connected to the coil 46, and the other end of the flexible circuit board extends to the outside through the lower magnetic bowl 45 and the housing 12 at a time to be connected to the terminal device. The upper magnetic part 41 and the lower magnetic part 42 are oppositely arranged in the same pole, and when the power is not on, the repulsion force between the upper magnetic part 41 and the lower magnetic part 42 is equal to the attraction force between the upper magnetic part 41 and the lower magnetic bowl 45 so as to achieve the static balance of magnetic force, avoid the hollow elastic sheet 42 from generating internal stress, and achieve the optimal fidelity effect. When the coil 46 is electrified, the static balance of the magnetic force is broken, and the upper magnetic bowl 44 or the lower magnetic bowl 45 arranged on the hollow elastic sheet 2 moves up and down to drive the hollow elastic sheet 2 to vibrate up and down. It is noted that the isolation area 43 between the upper magnetic member 41 and the lower magnetic member 42 is always present no matter how the upper magnetic bowl 44 or the lower magnetic bowl 45 moves up and down, i.e. when the amplitude of the downward vibration of the upper magnetic bowl 44 or the lower magnetic bowl 45 is maximum, the upper magnetic member 41 will not touch the second magnet 42 and the coil 46 to hinder the movement.

The space low-frequency adjusting plate 3 is connected between the hollowed-out elastic sheet 2 and the upper magnetic bowl 44, so that the hollowed-out elastic sheet 2 is not only attached to the upper magnetic bowl 44 but also freely adjusted in the framework stacking in the Z direction, and the size of the isolation region between the upper magnetic part 41 and the lower magnetic part 42 can be adjusted. The hollow elastic sheet 2 and the space low-frequency adjusting plate 3 are matched to adjust the effective vibration area of the hollow elastic sheet 2 so as to adjust the resonance frequency point of the device. Specifically, under the condition that the overall size, thickness and material of the hollowed-out elastic sheet 2 are not changed, the length, width and area of the inner elastic sheet 21 are changed, and further the length and area of the connecting elastic sheet 23 between the inner elastic sheet 21 and the outer elastic sheet 22 are changed, wherein the length and area of the connecting elastic sheet 23 are the effective vibration area of the hollowed-out spring, so that the resonance frequency point F0 of the system is changed, the low-frequency effect is flexibly adjusted, and the lowest resonance frequency point can reach 80 Hz; meanwhile, the spatial low-frequency adjusting plate 3 changes along with the change of the length, the width and the area of the inner elastic sheet 21, and the change of the F0 can cause the change of the amplitude, so that the height of the adjusting plate also needs to be correspondingly adjusted, and the hollow elastic sheet 2 and the upper magnetic bowl 44 are completely connected in a Z direction for stacking. The isolation region 43 is filled with one or more of air, damping material, and other elastic members, such as magnetic liquid, foam, spring, etc.

As shown in fig. 3, the hollowed-out elastic piece 2 includes an inner elastic piece 21, an outer elastic piece 22, and a plurality of connecting elastic pieces 23 connected between the inner elastic piece 21 and the outer elastic piece 22, the inner elastic piece 21 is equal in size to the spatial low frequency adjustment plate 3 and is mounted on the spatial low frequency adjustment plate 3, and the outer elastic piece 22 is mounted on the external packaging structure. Specifically, the external packaging structure includes a housing 12 and a cover plate 13 covering the housing 12, and the hollow elastic sheet 2 is embedded in the housing 12 and is opposite to the cover plate 13. For further better fixed fretwork shell fragment 2, shell 12 is provided with mounting groove 14 at the open end of cavity 11, and fretwork shell fragment 2 inlays and establishes in mounting groove 14, and outer shell fragment 22 is installed in the mounting groove promptly, and interior shell fragment 21 is installed on space low frequency regulating plate 3, and connects shell fragment 23 and last magnetism bowl 44 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 production device and the sound insulation effect, the cover plate 13 is covered on the mounting groove 14, and the cover plate is matched with the mounting groove 14 and closes the hollow cavity 11. The cover plate 13 is preferably made of metal materials, the rigidity is good, no deformation exists, the distance between the cover plate 12 and the hollowed-out elastic piece 2 is larger than the maximum working vibration displacement of the hollowed-out elastic piece 2, and vibration can be guaranteed to be normally carried out.

The embodiment of the utility model provides a wearable equipment is still provided, installs foretell osteoacusis sound generating mechanism, and wearable equipment can be earphone, wearable glasses, AR, MR etc. and transferable low frequency signal just transmits the amplitude moderate, balanced whole voice frequency section.

The utility model discloses a bone conduction sound generating mechanism and wearable equipment set up space low frequency before fretwork shell fragment and exciter and adjust the version, adjust the framework of fretwork shell fragment and exciter in Z axle side through space low frequency adjusting plate and pile up to the clearance of adjustment isolation region is with adjusting device's resonant frequency point. The amplitude of the sound signal transmitted by the sound generating device is moderate, and meanwhile, the bass part can be synchronously transmitted into the auditory canal, so that the whole sound frequency section is balanced, a better acoustic effect is achieved, and the user experience and the product sound quality are obviously improved; the exciter completely utilizes the magnetic force balance to achieve the static balance among all 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, has simple structure, is easy to realize and reduces the production cost; 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.

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 (12)

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;

the exciter comprises an upper magnetic part and a lower magnetic part, wherein the upper magnetic part and the lower magnetic part are oppositely arranged in parallel in the Z-axis direction, and a gap exists to form an isolation region;

the space low-frequency adjusting plate is arranged between the hollowed-out elastic sheet and the exciter, the space low-frequency adjusting plate adjusts the hollowed-out elastic sheet and the framework of the exciter in the Z-axis direction to be stacked, the gap of the isolation area is adjusted, and the hollowed-out elastic sheet and the space low-frequency adjusting plate are matched to adjust the effective vibration area of the hollowed-out elastic sheet to adjust the resonance frequency point of the device.

2. The bone conduction sound production device according to claim 1, wherein the magnetic flux of the lower magnetic member is less than or equal to the magnetic flux of the upper magnetic member, the actuator further comprises an upper magnetic bowl accommodating the upper magnetic member and a lower magnetic bowl accommodating the lower magnetic member, the upper magnetic member and the lower magnetic member are arranged in a homopolar and opposite manner, and in a non-energized state, 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, thereby achieving the optimal fidelity effect.

3. The bone conduction sound generator of claim 2, wherein the activator further comprises a coil mounted within the lower magnetic bowl and disposed about the lower magnetic member.

4. The bone conduction sound generator of claim 3, wherein the actuator further comprises 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 extending outside the external packaging structure.

5. The bone conduction sound-producing device according to claim 2, wherein the lower magnetic bowl is mounted at the bottom of the hollow cavity, and the upper magnetic bowl is connected with the spatial low frequency adjustment plate.

6. The bone conduction sound generator of claim 2, 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 1, wherein the isolation region is filled with one or more of air, a damping material, and an elastic member.

9. The bone conduction sound generating device according to claim 1, wherein the hollowed-out elastic piece comprises an inner elastic piece, an outer elastic piece and a plurality of connecting elastic pieces connected between the inner elastic piece and the outer elastic piece, the inner elastic piece is mounted on the spatial low frequency adjustment plate, and the outer elastic piece is mounted on the external packaging structure.

10. The bone conduction sound-generating device according to claim 1, wherein the external packaging structure comprises a housing and a cover plate covering the housing, and the hollowed-out elastic piece is embedded in the housing and arranged opposite to the cover plate.

11. The bone conduction sound generator of claim 10, wherein the distance between the cover plate and the hollowed-out spring plate is greater than the maximum working vibration displacement of the hollowed-out spring plate.

12. A wearable device comprising the bone conduction sound emitting apparatus of any one of claims 1 to 11.

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