WO2022236739A1 - 一种骨传导发声装置和一种可穿戴设备 - Google Patents
一种骨传导发声装置和一种可穿戴设备 Download PDFInfo
- Publication number
- WO2022236739A1 WO2022236739A1 PCT/CN2021/093370 CN2021093370W WO2022236739A1 WO 2022236739 A1 WO2022236739 A1 WO 2022236739A1 CN 2021093370 W CN2021093370 W CN 2021093370W WO 2022236739 A1 WO2022236739 A1 WO 2022236739A1
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- WO
- WIPO (PCT)
- Prior art keywords
- elastic piece
- upper magnetic
- hollow
- piece
- bone conduction
- Prior art date
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 41
- 230000003068 static effect Effects 0.000 claims description 19
- 238000004806 packaging method and process Methods 0.000 claims description 18
- 238000002955 isolation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 230000004907 flux Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000005538 encapsulation Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 17
- 210000000613 ear canal Anatomy 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 210000003027 ear inner Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 210000000860 cochlear nerve Anatomy 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000004880 lymph fluid Anatomy 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 210000002985 organ of corti Anatomy 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/13—Hearing devices using bone conduction transducers
Definitions
- the utility model relates to the technical field of bone conduction sound generation, in particular to a bone conduction sound generation device and a wearable device.
- Bone conduction is a sound conduction method, which converts sound into mechanical vibrations of different frequencies, and transmits sound waves through the human skull, bone labyrinth, inner ear lymph fluid, spiral organ, and auditory center. Compared with the traditional sound conduction method of generating sound waves through the acoustic membrane, bone conduction saves many steps of sound wave transmission, and can achieve clear sound reproduction in noisy environments, and sound waves will not affect others due to diffusion in the air .
- bone conduction earphones manufactured with bone conduction sound technology are called: bone conduction earphones.
- the conduction of sound waves is different from that of ordinary in-ears. It does not require the vibration of the eardrum, but directly transmits to the auditory nerve through the bone, which not only improves the comfort, but also It protects the user's hearing and enables the user to hear the external sound directly, which has its unique advantages.
- the existing bone conduction earphones have the following defects:
- the bone conduction sounding device used in the existing bone conduction earphones transmits low-frequency signals, it will generate a relatively large vibration amplitude, and there will be a strong sense of vibration during use, which will affect the customer experience. Therefore, in order to overcome the above-mentioned defects, the earphone will directly shield the low-frequency signal in practical applications. Although this reduces the vibration, the sound transmitted to the ear lacks the bass part, and the sound quality is not high, which will also affect the customer experience. sense. Therefore, it is very meaningful to study a bone conduction sound generating device with rich low-frequency content and improved low-frequency sound quality and sound effect.
- the purpose of the present invention is to provide a bone conduction sound generating device and a wearable device, which can transmit low-frequency signals with moderate amplitude and equalize the entire sound frequency range.
- the present invention proposes a bone conduction sounding device, which includes an external packaging structure, a hollow cavity is arranged in the external packaging structure, and the hollow cavity is provided with:
- the hollow elastic piece includes an inner elastic piece, an outer elastic piece sleeved outside the inner elastic piece, and a plurality of connection elastic pieces connected between the inner elastic piece and the outer elastic piece, and the outer elastic piece is embedded in the outer On the packaging structure;
- An exciter the exciter includes an upper magnetic piece, a lower magnetic piece, and an upper magnetic bowl connected between the upper magnetic piece and the hollow shrapnel, the upper magnetic piece and the lower magnetic piece are parallel to each other in the Z-axis direction and mutual isolation settings;
- the inner elastic piece is connected to the upper magnetic bowl of the exciter, and the hollow elastic piece cooperates with the upper magnetic bowl to adjust the effective vibration area of the hollow elastic piece to adjust the resonance frequency point of the device.
- the inner elastic piece and the outer elastic piece are arranged at positions staggered from each other in the horizontal direction, and the inner elastic piece and the connecting elastic piece cooperate to adjust the effective vibration area of the hollow elastic piece to adjust the resonance frequency point of the device.
- the connecting elastic piece is arranged obliquely, the higher end of the connecting elastic piece is connected to the outer elastic piece, the lower end of the connecting elastic piece is connected to the inner elastic piece, and the connecting elastic piece adjusts the connection between the hollow elastic piece and the
- the structure of the exciter in the Z-axis direction is stacked, and the gap between the upper magnetic part and the lower magnetic part is adjusted.
- the upper magnetic bowl accommodates the upper magnetic piece
- the upper magnetic bowl includes a top wall
- the top wall is provided with an upwardly protruding boss
- the inner elastic piece is connected to the boss, so The inner elastic piece, the connecting elastic piece and the boss cooperate to adjust the effective vibration area of the hollow elastic piece to adjust the resonant frequency point of the device.
- the boss adjusts the frame stacking of the hollow elastic sheet and the exciter in the Z-axis direction, and adjusts the gap between the upper magnetic piece and the lower magnetic piece.
- the bottom surface area of the upper magnetic bowl is smaller than the bottom surface area of the upper magnetic piece
- the actuator is connected to the inner elastic piece through the upper magnetic bowl
- the inner elastic piece, the connecting elastic piece and the upper magnetic bowl Cooperate with adjusting the effective vibration area of the hollow shrapnel to adjust the resonant frequency point of the device.
- the bottom surface of the upper magnetic bowl is smaller than or equal to the surface area of the inner elastic piece, and the upper magnetic bowl adjusts the stacking of the hollow elastic piece and the exciter in the Z-axis direction, and adjusts the upper The gap between the magnet and the lower magnet.
- the exciter also includes a lower magnetic bowl for accommodating the lower magnetic piece, the lower magnetic piece is connected to the bottom of the hollow cavity through the lower magnetic bowl, and the magnetic flux of the upper magnetic piece is greater than or equal to
- the upper magnetic part and the lower magnetic part are oppositely arranged with the same pole.
- the repulsive force between the upper magnetic part and the lower magnetic part will The suction force between them is equal to maintain the static balance of the magnetic force.
- the actuator further includes a coil installed in the lower magnetic bowl and arranged around the lower magnetic member, and a flexible circuit board arranged between the coil and the lower magnetic bowl, one end of the flexible circuit board It is connected with the coil, and the other end extends out of the external packaging structure.
- the upper magnetic part includes at least one magnet and/or the lower magnetic part includes at least one magnet.
- the gap is filled with one or more of air, damping material and elastic member.
- the external packaging structure includes a housing configured with a hollow cavity and a cover plate covering the housing, and the hollow elastic piece is embedded in the housing and is arranged opposite to the cover plate.
- the present invention also proposes a wearable device, including the above-mentioned bone conduction sound generating device.
- the present invention has the following advantages:
- the bone conduction sounding device of the present invention adopts a split exciter, connects the inner shrapnel of the hollow shrapnel to the upper magnetic bowl of the exciter, adjusts the effective vibration area of the hollow shrapnel through the cooperation of the hollow shrapnel and the upper magnetic bowl to adjust the resonance frequency of the device
- the amplitude of the sound signal transmitted by the sound generating device is moderate, and at the same time, the bass part can be transmitted to the ear canal synchronously, so as to balance the entire sound frequency range, achieve better acoustic effects, and significantly improve user experience and product sound quality.
- the inner elastic piece and the outer elastic piece of the hollowed-out elastic piece are arranged at positions staggered from each other in the horizontal direction, and the effective vibration area of the hollowed-out elastic piece is adjusted through cooperation of the inner elastic piece and the connecting elastic piece to adjust the resonant frequency point of the device,
- the shrapnel adjust the frame stack of the hollow shrapnel and the exciter in the Z-axis direction, and adjust the gap between the upper and lower magnetic parts, so that the sounding device can transmit low-frequency signals with moderate amplitude, and balance the entire sound frequency range
- the hollow shrapnel and the exciter are connected through the boss arranged on the upper magnetic bowl, and the effective vibration area of the hollow shrapnel is adjusted through the cooperation of the hollow shrapnel and the boss to adjust the resonant frequency point of the device.
- the hollow shrapnel and the exciter are connected through the upper magnetic bowl whose bottom surface area is smaller than that of the upper magnetic piece, and the hollow shrapnel cooperates with the upper magnetic bowl to adjust the effective vibration area of the hollow shrapnel to adjust the resonant frequency point of the device.
- the upper magnetic bowl adjusts the stacking of the hollow shrapnel and the frame of the exciter in the Z-axis direction, and adjusts the gap between the upper and lower magnetic parts, so that the sounding device transmits low-frequency signals with moderate amplitude, and balances the entire sound frequency range;
- the exciter uses two upper magnetic parts and lower magnetic parts arranged opposite to each other to achieve the static balance between the parts by using the magnetic force balance completely, without additional support structure, simple structure and easy to realize ,reduce manufacturing cost;
- the outer packaging structure is covered with a cover plate, which enhances the strength of the entire device, and at the same time has a better sound insulation effect, effectively preventing the occurrence of sound leakage.
- Fig. 1 is an exploded view of the bone conduction sound generating device in Embodiment 1 of the present invention
- Fig. 2 is a cross-sectional view of the bone conduction sound generating device in Embodiment 1 of the present invention
- Fig. 3 is a schematic structural view of the hollowed-out shrapnel in Embodiment 1 of the present invention.
- Fig. 4 is an exploded view of the bone conduction sound generating device in Embodiment 2 of the present invention.
- Fig. 5 is a cross-sectional view of the bone conduction sound generating device in Embodiment 2 of the present invention.
- Fig. 6 is a schematic structural view of the upper magnetic bowl in Embodiment 2 of the present invention.
- Fig. 7 is a schematic structural view of the hollow shrapnel in Embodiment 2 and Embodiment 3 of the present invention.
- Fig. 8 is an exploded view of the bone conduction sound generating device in Embodiment 3 of the present invention.
- Fig. 9 is a cross-sectional view of the bone conduction sound generating device in Embodiment 3 of the present invention.
- a bone conduction sound generating device corresponding to the present invention includes an external packaging structure, a hollow cavity 11 is provided in the external packaging structure, and a hollow shrapnel 2 and an exciter are provided in the hollow cavity 11.
- the hollowed-out shrapnel includes an inner shrapnel 21, an outer shrapnel 22 sleeved outside the inner shrapnel 21, and a plurality of connection shrapnel 23 connected between the inner shrapnel 21 and the outer shrapnel 22;
- the exciter includes an upper magnetic piece 31, a lower magnetic piece 32 and
- the upper magnetic bowl 33 connected between the upper magnetic member 31 and the hollow elastic piece 2 , the upper magnetic member 31 and the lower magnetic member 32 are arranged parallel to each other in the Z-axis direction and separated from each other to form an isolation area 35 .
- the outer shrapnel 22 is embedded in the external packaging structure, the inner shrapnel 21 is connected to the upper magnetic bowl 33 of the exciter, and the hollow shrapnel 2 cooperates with the upper magnetic bowl 33 to adjust the effective vibration area of the hollow shrapnel to adjust the resonance frequency point of the device.
- the hollow shrapnel 2 is not attached to the upper magnetic bowl 33 in its entirety, and the frame stacking of the hollow shrapnel 2 and the exciter in the Z-axis direction can be freely adjusted by changing the shape of the hollow shrapnel 2 or the upper magnetic bowl 33.
- the gap of the isolation area 35 between the magnetic part 31 and the lower magnetic part 32 can also be adjusted by the hollow elastic piece 2 or the upper magnetic bowl 33 .
- the inner shrapnel 21 cooperates with the upper magnetic bowl 33 to adjust the effective vibration area of the hollow shrapnel to adjust the resonant frequency point of the device.
- the length, width and area of the inner shrapnel 21 are changed, thereby changing the length and area of the connecting shrapnel 23 between the inner shrapnel 21 and the outer shrapnel 22, and connecting The length and area of the shrapnel 23 are the effective vibration area of the hollow spring, thereby changing the resonance frequency point F0 of the system and flexibly adjusting the low-frequency effect.
- the minimum resonance frequency point can reach 80Hz.
- the part of the upper magnetic bowl 33 connected to the inner shrapnel 21 can also change with the change of the length, width and area of the inner shrapnel 21.
- the overall height of the connection between the hollow shrapnel 2 and the upper magnetic bowl 33 will also change.
- Corresponding adjustments are required to completely connect the hollow shrapnel 2 and the stacking in the Z direction of the upper magnetic bowl 33, and adjust the gap between the isolation area 35 between the upper magnetic part 31 and the lower magnetic part 32, so that the sound signal transmitted by the sounding device has a moderate amplitude .
- the bass part can be transmitted to the ear canal synchronously, equalizing the entire sound frequency range, achieving better acoustic effects, and significantly improving user experience and product sound quality.
- the exciter also includes a lower magnetic bowl 34 containing the lower magnetic piece 32 , a coil 36 installed in the lower magnetic bowl 34 and arranged around the lower magnetic piece 32 , and a flexible circuit board 37 arranged between the coil 36 and the lower magnetic bowl 34 .
- the upper magnetic part 31 is connected to the inner elastic piece 21 through the upper magnetic cup 33
- the lower magnetic part 32 is connected to the bottom of the hollow cavity 11 through the lower magnetic cup 34 .
- the upper magnetic part 31 is installed in the upper magnetic bowl 33 or directly pasted and connected on the upper magnetic bowl 33. After the coil 36 is energized, different magnetic fields are generated to cooperate with the upper magnetic part 31 to provide driving force for the vibration of the hollow shrapnel 2.
- the upper magnetic member 31 includes at least one magnet, which may be a whole magnet, or a plurality of magnets stacked and spliced together.
- the lower magnetic piece 32 is installed in the lower magnetic bowl 34, and the repulsive force between the upper magnetic piece 31 and the lower magnetic piece 32 offsets the suction force between the upper magnetic piece 31 and the lower magnetic bowl 34, so that the exciter is in a magnetic static state when it is not energized.
- Balanced, to avoid the internal stress of the hollow shrapnel 2 fully use the magnetic force balance to achieve the static balance between the components, no additional support structure is needed, the structure is simple, easy to realize, and reduce the production cost.
- the lower magnetic member 32 includes at least one magnet, which may be a whole magnet, or a plurality of magnets stacked and spliced together.
- the coil 36 is installed in the lower magnetic bowl 34 and is arranged around the lower magnetic member 32 .
- the hollow area of the coil 36 is less 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, and the surface area of the bottom of the lower magnetic bowl 34 is greater than or equal to the area of the lower magnetic part.
- the surface area of the bottom of the bowl 34, the magnetic flux of the lower magnetic member 32 is less than or equal to the magnetic flux of the upper magnetic member 31, and the magnetic flux here can be changed by changing the volume or material of the magnetic member.
- the flexible circuit board 37 is arranged between the coil 36 and the lower magnetic bowl 34, one end of which is connected to the coil 36, and the other end is extended through the lower magnetic bowl 34 and the housing 12 to connect with the terminal equipment.
- the upper magnetic part 31 and the lower magnetic part 32 are oppositely arranged with the same pole.
- the repulsive 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 to achieve
- the static balance of the magnetic force avoids the internal stress of the hollow shrapnel 2 and achieves the best fidelity effect.
- the coil 36 is energized, the magnetic static balance is broken, and the upper magnetic bowl 33 installed on the hollow shrapnel 2 moves up and down, driving the hollow shrapnel 2 to vibrate up and down.
- the isolation area 35 is filled with one or more of air, damping material, and other elastic elements, which may be magnetic fluid, foam, spring, and the like.
- the external packaging structure includes a housing 12 configured with a hollow cavity 11 and a cover plate 13 covering the housing 12 .
- the hollow elastic piece 2 is embedded in the housing 12 and is opposite to the cover plate 13 .
- the housing 12 is provided with a mounting groove 121 at the opening end of the hollow cavity 11, the outer shrapnel 22 is installed in the mounting groove 121, the upper magnetic bowl 33 is connected to the inner shrapnel 21, and the connecting shrapnel 23 is separated from upper magnetic bowl 33 all the time, guarantees that hollow shrapnel 2 can produce vibration.
- the cover plate 13 is covered on the installation groove 121 , and the cover plate 13 cooperates with the installation groove 121 and closes the hollow cavity 11 .
- the cover plate 13 is preferably made of metal material with good rigidity and no deformation.
- the distance between the cover plate 13 and the hollow elastic piece 2 is greater than the maximum vibration displacement of the hollow elastic piece 2 to ensure that the vibration can be carried out normally.
- the outer packaging structure is covered with a cover plate 13, which enhances the strength of the entire device, and has a good sound insulation effect, effectively preventing the occurrence of sound leakage.
- the utility model also provides a wearable device, which is equipped with the above-mentioned bone conduction sounding device.
- the wearable device can be earphones, wearable glasses, AR, MR, etc., and can transmit low-frequency signals with moderate amplitude to balance the entire sound frequency range.
- the inner elastic piece 21 and the outer elastic piece 22 of the hollow elastic piece 2 are arranged at positions staggered from each other in the horizontal direction
- the outer shrapnel 22 is embedded in the external packaging structure, and the inner shrapnel 21 is connected to the upper magnetic bowl 33 of the exciter.
- the inner shrapnel 21 and the connecting shrapnel 23 cooperate to adjust the effective vibration area of the hollow shrapnel to adjust the resonance frequency point of the device.
- the connecting elastic piece 23 is arranged obliquely to achieve the purpose that the inner elastic piece 21 and the outer elastic piece 22 are arranged at positions staggered from each other in the horizontal direction.
- the higher end of the connecting elastic piece 23 is connected to the outer elastic piece 22, and the connecting elastic piece
- the lower end of 23 is connected to the inner shrapnel 21, and the hollow shrapnel 2 is not attached to the upper magnetic bowl 33 as a whole, so that the stacking of the hollow shrapnel 2 and the exciter in the Z-axis direction can be adjusted freely, and the upper magnetic can also be adjusted.
- the gap of the isolation region 35 between the member 31 and the lower magnetic member 32 is arranged obliquely to achieve the purpose that the inner elastic piece 21 and the outer elastic piece 22 are arranged at positions staggered from each other in the horizontal direction.
- the higher end of the connecting elastic piece 23 is connected to the outer elastic piece 22, and the connecting elastic piece
- the lower end of 23 is connected to the inner shrapnel 21, and the hollow
- the length, width and area of the inner shrapnel 21 are changed, and then the length and area of the connecting shrapnel 23 are changed.
- the length and area of the connecting shrapnel 23 are the hollow spring
- the effective vibration area can change the resonance frequency point F0 of the system, and flexibly adjust the low-frequency effect.
- the minimum resonance frequency point can reach 80Hz.
- the upper magnetic part 31 is installed in the upper magnetic bowl 33. After the coil 36 is energized, different magnetic fields are generated to cooperate with the upper magnetic part 31 to provide driving force for the vibration of the hollow shrapnel 2.
- the upper magnetic part 31 and the upper magnetic bowl 33 There is no clearance fit or only assembly space between them. Compared with the traditional exciter, there is no need to reserve the insertion space of the voice coil, which reduces the volume of the entire sounding device.
- the lower magnetic piece 32 is installed in the lower magnetic bowl 34, and the repulsive force between the upper magnetic piece 31 and the lower magnetic piece 32 offsets the suction force between the upper magnetic piece 31 and the lower magnetic bowl 34, so that the exciter is in a magnetic static state when it is not energized.
- the exciter uses two upper magnetic parts 31 and lower magnetic parts 32 arranged opposite to each other to achieve the static balance between the parts by using the magnetic force balance without additional support structures.
- the structure is simple, easy to realize, and the production cost is reduced.
- the upper magnetic part 31 and the lower magnetic part 32 are oppositely arranged with the same pole.
- the repulsive 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 to achieve
- the static balance of the magnetic force avoids the internal stress of the hollow shrapnel 2 and achieves the best fidelity effect.
- the coil 36 is energized, the magnetic static balance is broken, and the upper magnetic bowl 33 installed on the hollow shrapnel 2 moves up and down, driving the hollow shrapnel 2 to vibrate up and down.
- an upwardly protruding boss 332 is provided on the top wall 331 of the upper magnetic bowl 33.
- the shrapnel 22 is embedded in the external packaging structure, the inner shrapnel 21 is connected to the boss 332, the inner shrapnel 21, the connecting shrapnel 23 and the boss 332 cooperate to adjust the effective vibration area of the hollow shrapnel to adjust the resonance frequency point of the device;
- the boss 332 on the upper magnetic bowl 33 to connect the hollow shrapnel 2 and the actuator, the hollow shrapnel 2 is not attached to the upper magnetic bowl 33 in one piece, and the Z-axis position between the hollow shrapnel 2 and the actuator can be adjusted freely.
- the frame stacking in the direction can also adjust the gap of the isolation area 35 between the upper magnetic part 31 and the lower magnetic part 32 .
- the surface area of the boss 332 is less than or equal to the surface area of the inner elastic piece 21 .
- the length, width and area of the inner shrapnel 21 are changed, and then the length and area of the connecting shrapnel 23 are changed.
- the length and area of the connecting shrapnel 23 are the effective spring of the hollow spring. Vibration area, so as to change the resonance frequency point F0 of the system, and flexibly adjust the low-frequency effect.
- the lowest resonance frequency point can reach 80Hz.
- the boss 332 can also change with the change of the length, width and area of the inner shrapnel 21.
- the height of the boss 332 also needs to be adjusted accordingly to completely connect the hollow shrapnel 2 and the upper magnetic bowl. 33 are stacked in the Z direction, and the gap between the isolation area 35 between the upper magnetic part 31 and the lower magnetic part 32 is adjusted, so that the amplitude of the sound signal transmitted by the sound generating device is moderate, and the bass part can be synchronously transmitted to the ear canal to balance the entire sound Frequency band, achieve better acoustic effect, significantly improve user experience and product sound quality.
- the upper magnetic part 31 is installed in the upper magnetic bowl 33. After the coil 36 is energized, different magnetic fields are generated to cooperate with the upper magnetic part 31 to provide driving force for the vibration of the hollow shrapnel 2.
- the upper magnetic part 31 and the upper magnetic bowl 33 There is no clearance fit or only assembly space between them. Compared with the traditional exciter, there is no need to reserve the insertion space of the voice coil, which reduces the volume of the entire sounding device.
- the lower magnetic piece 32 is installed in the lower magnetic bowl 34, and the repulsive force between the upper magnetic piece 31 and the lower magnetic piece 32 offsets the suction force between the upper magnetic piece 31 and the lower magnetic bowl 34, so that the exciter is in a magnetic static state when it is not energized.
- the exciter uses two upper magnetic parts 31 and lower magnetic parts 32 arranged opposite to each other to achieve the static balance between the parts by using the magnetic force balance without additional support structures.
- the structure is simple, easy to realize, and the production cost is reduced.
- the upper magnetic part 31 and the lower magnetic part 32 are oppositely arranged with the same pole.
- the repulsive 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 to achieve
- the static balance of the magnetic force avoids the internal stress of the hollow shrapnel 2 and achieves the best fidelity effect.
- the coil 36 is energized, the magnetic static balance is broken, and the upper magnetic bowl 33 installed on the hollow shrapnel 2 moves up and down, driving the hollow shrapnel 2 to vibrate up and down.
- the exciter is directly connected to the inner shrapnel 21 of the hollow shrapnel 2 through the upper magnetic bowl 33, the inner shrapnel 21, the connecting shrapnel 23 and the upper magnetic bowl 33 cooperate to adjust the effective vibration area of the hollow shrapnel 2 to adjust the resonance of the device frequency points.
- the bottom surface of the upper magnetic bowl 33 is less than or equal to the surface area of the inner elastic piece 21, and the upper magnetic bowl 33 adjusts the stacking of the hollowed elastic piece and the exciter in the Z-axis direction, and adjusts the relationship between the upper magnetic piece 31 and the lower magnetic piece 32. the gap between.
- the length and area of the connecting shrapnel 23 are the effective springs of the hollow spring Vibration area, so as to change the resonance frequency point F0 of the system, and flexibly adjust the low-frequency effect.
- the lowest resonance frequency point can reach 80Hz.
- the upper magnetic bowl 33 can also change with the change of the length, width and area of the inner shrapnel 21.
- the height of the upper magnetic bowl 33 also needs to be adjusted accordingly to completely connect the hollow shrapnel 2 and the upper
- the Z-direction of the magnetic parts 31 is stacked, and the gap between the upper and lower magnetic parts is adjusted at the same time, so that the amplitude of the sound signal transmitted by the sound generating device is moderate, and at the same time, the bass part can be transmitted to the ear canal synchronously, and the entire sound frequency range is balanced to achieve better Acoustic effects significantly improve user experience and product sound quality.
- the upper magnetic bowl 33 cannot accommodate the upper magnetic piece, and the upper magnetic piece 31 is directly pasted and connected to the upper magnetic bowl 33.
- the coil 36 After the coil 36 is energized, different magnetic fields are generated to cooperate with the upper magnetic piece 31 to provide vibration for the hollow shrapnel 2.
- For driving force there is no gap between the upper magnetic part 31 and the upper magnetic bowl 33.
- Compared with the traditional exciter there is no need to reserve a space for inserting the voice coil, and the volume of the entire sound generating device is reduced.
- the lower magnetic piece 32 is installed in the lower magnetic bowl 34, and the repulsive force between the upper magnetic piece 31 and the lower magnetic piece 32 offsets the suction force between the upper magnetic piece 31 and the lower magnetic bowl 34, so that the exciter is in a magnetic static state when it is not energized.
- the upper magnetic part 31 and the lower magnetic part 32 are oppositely arranged with the same pole.
- the repulsive 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 to achieve
- the static balance of the magnetic force avoids the internal stress of the hollow shrapnel 2 and achieves the best fidelity effect.
- the coil 36 is energized, the magnetic static balance is broken, and the upper magnetic bowl 33 installed on the hollow shrapnel 2 moves up and down, driving the hollow shrapnel 2 to vibrate up and down.
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Manufacturing & Machinery (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
一种骨传导发声装置和一种可穿戴设备，其中骨传导发声装置包括外部封装结构，外部封装结构内设置有中空腔体（11），中空腔体（11）内设置有：镂空弹片（2），镂空弹片（2）包括内弹片（21）、套设在内弹片（21）外的外弹片（22）以及多个连接在内弹片（21）和外弹片（22）之间的连接弹片（23），外弹片（22）嵌设在外部封装结构上；激励器，激励器包括上磁性件（31）、下磁性件（32）以及连接在上磁性件（31）和镂空弹片（2）之间的上磁碗（33），上磁性件（31）和下磁性件（32）在Z轴方向上平行相对且相互隔离设置；内弹片（21）连接在激励器的上磁碗（33）上，镂空弹片（2）与上磁碗（33）配合调整镂空弹片（2）的有效振动面积以调整装置的共振频率点。安装有骨传导发声装置的可穿戴设备，可传递低频信号且传递振幅适中，均衡整个声音频段，提升用户体验和产品音质。
Description
本实用新型涉及骨传导发声技术领域，特别涉及一种骨传导发声装置和一种可穿戴设备。
骨传导是一种声音传导方式，即将声音转化为不同频率的机械振动，通过人的颅骨、骨迷路、内耳淋巴液、螺旋器、听觉中枢来传递声波。相对于通过声膜产生声波的传统声音传导方式，骨传导省去了许多声波传递的步骤，能在嘈杂的环境中实现清晰的声音还原，而且声波也不会因为在空气中扩散而影响到他人。
应用骨传导发声技术制造的耳机，称之为：骨传导耳机，其声波的传导与普通的入耳式不同，不需要耳膜的振动，而是直接通过骨头传至听神经，既提高了舒适性，又保护了用户的听力，还能使用户直接听清外部声音，具有其独特的优越性，但是现有骨传导耳机存在以下缺陷：
现有的骨传导耳机内应用的骨传导发声装置在传导低频信号时，会产生较大的振动幅度，使用时有较强的振感，影响客户体验。因此为了克服上述缺陷，在实际应用时耳机会直接把低频信号屏蔽掉，这样虽然减轻了振感，但传递到耳朵中的声音缺少低音部分，声音质量不高，也同样会影响到客户的体验感。因此研究一款具有丰富低频内容，改善低频音质音效的骨传导发声装置很有意义。
发明内容
本发明的目的是提供一种骨传导发声装置和一种可穿戴设备，可传递低频信号且传递振幅适中，均衡整个声音频段。
为了解决上述技术问题，一方面本发明提出了一种骨传导发声装置，包括外部封装结构，所述外部封装结构内设置有中空腔体，所述中空腔体内设置有：
镂空弹片，所述镂空弹片包括内弹片、套设在所述内弹片外的外弹片以及多个连接在所述内弹片和外弹片之间的连接弹片，所述外弹片嵌设在所述外部封装结构上；
激励器，所述激励器包括上磁性件、下磁性件以及连接在所述上磁性件和镂空弹片之间的上磁碗，所述上磁性件和下磁性件在Z轴方向上平行相对且相互隔离设置；
所述内弹片连接在所述激励器的上磁碗上，所述镂空弹片与所述上磁碗配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
作为优选，所述内弹片与外弹片被配置在水平方向相互错开的位置上，所述内弹片和连接弹片配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
作为优选，所述连接弹片倾斜设置，所述连接弹片的较高端连接至所述外弹片，所述连接弹片的较低端连接至所述内弹片，所述连接弹片调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
作为优选，所述上磁碗容纳所述上磁性件，所述上磁碗包括顶壁，所述顶壁设置有向上凸起的凸台，所述内弹片连接在所述凸台上，所述内弹片、连接弹片以及所述凸台配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
作为优选，所述凸台调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
作为优选，所述上磁碗的底部表面积小于所述上磁性件的底部表面积，所 述激励器通过所述上磁碗连接在所述内弹片上，所述内弹片、连接弹片以及上磁碗配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
作为优选，所述上磁碗的底部表面小于或等于所述内弹片的表面积，所述上磁碗调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
作为优选，所述激励器还包括容纳所述下磁性件的下磁碗，所述下磁性件通过所述下磁碗连接在所述中空腔体底部，所述上磁性件的磁通量大于或等于所述下磁性件的磁通量，所述上磁性件和下磁性件同极相对设置，在未通电时，所述上磁性件和下磁性件之间的斥力与所述上磁性件和下磁碗之间的吸力相等以保持磁力静态平衡。
作为优选，所述激励器还包括安装在所述下磁碗内且围绕所述下磁性件设置的线圈和设置在所述线圈和下磁碗之间的柔性电路板，所述柔性电路板一端与所述线圈相连，另一端延伸至所述外部封装结构外。
作为优选，所述上磁性件至少包括一个磁铁和/或所述下磁性件至少包括一个磁铁。
作为优选，所述间隙内填充有空气、阻尼材料、弹性件中的一种或多种。
作为优选，所述外部封装结构包括配置有中空腔体的外壳和盖设在所述外壳上的盖板，所述镂空弹片嵌设在所述外壳内且与所述盖板相对设置。
另一方面本发明还提出了一种可穿戴设备，包括上述的骨传导发声装置。
与现有技术相比，本发明具有以下优点：
本发明的骨传导发声装置，采用分体式激励器，将镂空弹片的内弹片连接在激励器的上磁碗，通过镂空弹片与上磁碗配合调整镂空弹片的有效振动面积以调整装置的共振频率点，使发声装置传递出的声音信号幅度适中，同时低音部分可以同步传递到耳道中，均衡整个声音频段，达到较好的声学效果，显著地提升用户体验和产品音质。
在一种优选方案中，将镂空弹片的内弹片与外弹片配置在水平方向相互错 开的位置上，通过内弹片和连接弹片配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点，同时通过连接弹片调整镂空弹片与激励器在Z轴方向上的构架堆叠，并调整上、下磁性件之间的间隙，使发声装置传递出低频信号且传递振幅适中，均衡整个声音频段；
在一种优选方案中，通过设置在上磁碗上的凸台连接镂空弹片和激励器，通过镂空弹片与凸台配合调整镂空弹片的有效振动面积以调整装置的共振频率点，同时通过凸台调整镂空弹片与激励器在Z轴方向上的构架堆叠，并调整上、下磁性件之间的间隙，使发声装置传递出低频信号且传递振幅适中，均衡整个声音频段；
在一种优选方案中，通过底部表面积小于上磁性件的上磁碗连接镂空弹片和激励器，通过镂空弹片与上磁碗配合调整镂空弹片的有效振动面积以调整装置的共振频率点，同时通过上磁碗调整镂空弹片与激励器在Z轴方向上的构架堆叠，并调整上、下磁性件之间的间隙，使发声装置传递出低频信号且传递振幅适中，均衡整个声音频段；
在一种优选方案中，激励器通过两个同极相对布置的上磁性件和下磁性件，完全利用磁力平衡来达到各部件之间的静态平衡，无需额外的支撑结构，结构简单，易于实现，降低生产成本；
在一种优选方案中，外部封装结构通过盖设盖板，增强了整个装置的强度，同时具有较好的隔音效果，有效防止了漏音现象的发生。
在此描述的附图仅用于解释目的，而不意图以任何方式来限制本发明公开的范围。另外，图中的各部件的形状和比例尺寸等仅为示意性的，用于帮助对本发明的理解，并不是具体限定本发明各部件的形状和比例尺寸。本领域的技术人员在本发明的教导下，可以根据具体情况选择各种可能的形状和比例尺寸来实施本发明。在附图中：
图1是本发明实施例一中的骨传导发声装置的爆炸图；
图2是本发明实施例一中的骨传导发声装置的剖视图；
图3是本发明实施例一中镂空弹片的结构示意图；
图4是本发明实施例二中的骨传导发声装置的爆炸图；
图5是本发明实施例二中骨传导发声装置的剖视图；
图6是本发明实施例二中上磁碗的结构示意图；
图7是本发明实施例二和实施例三中镂空弹片的结构示意图；
图8是本发明实施例三中的骨传导发声装置的爆炸图；
图9是本发明实施例三中的骨传导发声装置的剖视图。
图中所示：
11、中空腔体；12、外壳；121、安装槽；13、盖板；2、镂空弹片；21、内弹片；22、外弹片；23、连接弹片；31、上磁性件；32、下磁性件；33、上磁碗；331、顶壁；332、凸台；34、下磁碗；35、隔离区；36、线圈；37、柔性电路板。
为了使本技术领域的人员更好地理解本发明中的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
需要说明的是，当元件被称为“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施例。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1至9所示，对应于本发明的一种骨传导发声装置，包括外部封装结构，外部封装结构内设置有中空腔体11，中空腔体11内设置有镂空弹片2和激励器。镂空弹片包括内弹片21、套设在内弹片21外的外弹片22以及多个连接在内弹片21和外弹片22之间的连接弹片23；激励器包括上磁性件31、下磁性件32以及连接在上磁性件31和镂空弹片2之间的上磁碗33，上磁性件31和下磁性件32在Z轴方向上平行相对设置，且相互隔离设置以形成隔离区35。外弹片22嵌设在外部封装结构上，内弹片21连接在激励器的上磁碗33上，镂空弹片2与上磁碗33配合调整镂空弹片的有效振动面积以调整装置的共振频率点。
进一步的，镂空弹片2不整片贴附于上磁碗33上，镂空弹片2与激励器在Z轴方向上的构架堆叠可通过改变镂空弹片2或上磁碗33的形状自由地调整，同时上磁性件31和下磁性件32之间的隔离区35的间隙也可以通过镂空弹片2或上磁碗33调整。内弹片21与上磁碗33配合调整镂空弹片的有效振动面积以调整装置的共振频率点。具体的，在镂空弹片2整体大小、厚度、材质不变的情况下，改变内弹片21的长宽和面积，进而改变内弹片21和外弹片22之间的连接弹片23的长度和面积，连接弹片23的长度和面积即为该镂空弹簧的有效振动面积，从而改变系统的共振频率点F0，灵活调整低频效果，共振频率点最低可以达到80Hz。同时，与内弹片21相连的上磁碗33部分也可随内弹片21长宽和面积的改变而改变，由于F0变化会导致振幅变化，所以镂空弹片2和上磁碗33相连的整体高度也需要做对应调整，完整连接镂空弹片2和上磁碗33的Z方向堆叠，并调整上磁性件31和下磁性件32之间的隔离区35的间隙，使发声装置传递出的声音信号幅度适中，同时低音部分可以同步传递到耳道中，均衡整个声音频段，达到较好的声学效果，显著地提升用户体验和产品音质。
激励器还包括容纳下磁性件32的下磁碗34、安装在下磁碗34内且围绕下磁性件32设置的线圈36以及设置在线圈36和下磁碗34之间的柔性电路板37。上磁性件31通过上磁碗33连接至内弹片21上，下磁性件32通过下磁碗34连接在中空腔体11底部。具体的，上磁性件31安装在上磁碗33内或直接粘贴连接在上磁碗33上，线圈36通电后产生不同的磁场与上磁性件31配合为镂空弹片2振动提供驱动力。优选的，上磁性件31至少包括一个磁铁，可以是一整块磁铁，也可以是多块磁铁堆叠、拼接而成。下磁性件32安装在下磁碗34内，上磁性件31和下磁性件32之间的斥力抵消了上磁性件31和下磁碗34之间的吸力，使激励器在未通电时处于磁力静态平衡，避免镂空弹片2产生内应力，完全利用磁力平衡来达到各部件之间的静态平衡，无需额外的支撑结构，结构简单，易于实现，降低生产成本。优选的，下磁性件32至少包括一个磁铁，可以是一整块磁铁，也可以是多块磁铁堆叠、拼接而成。线圈36安装在下磁碗34内且围绕下磁性件32设置。优选的，线圈36的中空面积小于或者等于线圈36所对应的上磁性件31的面积，下磁性件32的面积小于线圈36的中空部分的面积，下磁碗34底部的表面积大于或者等于下磁碗34底部的表面积，下磁性件32的磁通量小于或等于上磁性件31的磁通量，此处的磁通量可通过更改磁性件的体积或材料改变。柔性电路板37设置在线圈36和下磁碗34之间，其一端与线圈36相连，另一端依次经过下磁碗34和外壳12延伸至外与终端设备相连。上磁性件31和下磁性件32同极相对布置，在未通电状态时，上磁性件31和下磁性件32之间的斥力与上磁性件31和下磁碗34之间的吸力相等以达到磁力静态平衡，避免镂空弹片2产生内应力，达到最优的保真效果。当在线圈36通电后，磁力静态平衡被打破，安装在镂空弹片2上的上磁碗33上下运动，带动镂空弹片2上下振动。值得注意的是无论上磁碗33如何上下运动，上磁性件31和下磁性件32之间的隔离区35始终是存在的，即当上磁碗33向下振动幅度最大时，上磁性件31都不会与下磁性件32和线圈36触碰阻碍运动。
优选的，隔离区35内填充有空气、阻尼材料、其他弹性件中的一种或多种， 可以是磁液，泡棉，弹簧等。
外部封装结构包括配置有中空腔体11的外壳12和盖设在外壳12上的盖板13，镂空弹片2嵌设在外壳12内且与盖板13相对设置。为了进一步更好的固定镂空弹片2，外壳12在中空腔体11的开口端设置有安装槽121，外弹片22安装在安装槽121内，上磁碗33连接在内弹片21上，而连接弹片23始终与上磁碗33相分离，保证镂空弹片2可以产生振动。
为了进一步保证整个发声装置的强度，以及隔音效果，盖板13盖设在安装槽121上，盖板13与安装槽121配合且封闭中空腔体11。盖板13优选采用金属材料，刚性好、无形变，盖板13与镂空弹片2之间的间距大于镂空弹片2的工作最大振动位移，确保振动可以正常进行。外部封装结构通过盖设盖板13，增强了整个装置的强度，同时具有较好的隔音效果，有效防止了漏音现象的发生。
本实用新型还提供一种可穿戴设备，安装有上述的骨传导发声装置，可穿戴设备可以是耳机、可穿戴眼镜、AR、MR等，可传递低频信号且传递振幅适中，均衡整个声音频段。
实施例一：
如图1至3所示，为了使镂空弹片2不整片贴附于上磁碗33上，在本实施例中，将镂空弹片2的内弹片21和外弹片22配置在水平方向相互错开的位置上，外弹片22嵌设在外部封装结构上，内弹片21连接在激励器的上磁碗33上，内弹片21和连接弹片23配合调整镂空弹片的有效振动面积以调整装置的共振频率点。
具体的，在本实施例中，连接弹片23倾斜设置以达到内弹片21与外弹片22被配置在水平方向相互错开的位置上的目的，连接弹片23的较高端连接至外弹片22，连接弹片23的较低端连接至内弹片21，镂空弹片2不整片贴附于上磁碗33上，即可自由的调整镂空弹片2与激励器在Z轴方向上的构架堆叠，又可以调整上磁性件31和下磁性件32之间的隔离区35的间隙。同时，在镂空弹 片2整体大小、厚度、材质不变的情况下，改变内弹片21的长宽和面积，进而改变连接弹片23的长度和面积，连接弹片23的长度和面积即为该镂空弹簧的有效振动面积，从而改变系统的共振频率点F0，灵活调整低频效果，共振频率点最低可以达到80Hz。同时通过连接弹片23调整镂空弹片2与激励器在Z轴方向上的构架堆叠，并调整上、下磁性件之间的隔离区35的间隙，使发声装置传递出的声音信号幅度适中，同时低音部分可以同步传递到耳道中，均衡整个声音频段，达到较好的声学效果，显著地提升用户体验和产品音质。
在本实施例中，上磁性件31安装在上磁碗33内，线圈36通电后产生不同的磁场与上磁性件31配合为镂空弹片2振动提供驱动力，上磁性件31与上磁碗33之间无间隙配合或仅存在有装配空间，与传统的激励器相比，无需预留音圈的插入空间，减小整个发声装置的体积。下磁性件32安装在下磁碗34内，上磁性件31和下磁性件32之间的斥力抵消了上磁性件31和下磁碗34之间的吸力，使激励器在未通电时处于磁力静态平衡，避免镂空弹片2产生内应力，激励器通过两个同极相对布置的上磁性件31和下磁性件32，完全利用磁力平衡来达到各部件之间的静态平衡，无需额外的支撑结构，结构简单，易于实现，降低生产成本。
上磁性件31和下磁性件32同极相对布置，在未通电状态时，上磁性件31和下磁性件32之间的斥力与上磁性件31和下磁碗34之间的吸力相等以达到磁力静态平衡，避免镂空弹片2产生内应力，达到最优的保真效果。当在线圈36通电后，磁力静态平衡被打破，安装在镂空弹片2上的上磁碗33上下运动，带动镂空弹片2上下振动。
实施例二
如图4至7所示，为了使镂空弹片2不整片贴附于上磁碗33上，在本实施例中，在上磁碗33的顶壁331上设置向上凸起的凸台332，外弹片22嵌设在外部封装结构上，内弹片21连接在凸台332上，内弹片21、连接弹片23以及凸台332配合调整镂空弹片的有效振动面积以调整装置的共振频率点；
具体的，通过在上磁碗33上设置凸台332连接镂空弹片2和激励器，使镂空弹片2不整片贴附于上磁碗33上，可自由的调整镂空弹片2与激励器在Z轴方向上的构架堆叠，又可调整上磁性件31和下磁性件32之间的隔离区35的间隙。优选的，凸台332的表面积小于或等于内弹片21的表面积。在镂空弹片2整体大小、厚度、材质不变的情况下，改变内弹片21的长宽和面积，进而改变连接弹片23的长度和面积，连接弹片23的长度和面积即为该镂空弹簧的有效振动面积，从而改变系统的共振频率点F0，灵活调整低频效果，共振频率点最低可以达到80Hz。同时，凸台332也可随内弹片21长宽和面积的改变而改变，由于F0变化会导致振幅变化，所以该凸台332的高度也需要做对应调整，完整连接镂空弹片2和上磁碗33的Z方向堆叠，并调整上磁性件31和下磁性件32之间的隔离区35的间隙，使发声装置传递出的声音信号幅度适中，同时低音部分可以同步传递到耳道中，均衡整个声音频段，达到较好的声学效果，显著地提升用户体验和产品音质。
在本实施例中，上磁性件31安装在上磁碗33内，线圈36通电后产生不同的磁场与上磁性件31配合为镂空弹片2振动提供驱动力，上磁性件31与上磁碗33之间无间隙配合或仅存在有装配空间，与传统的激励器相比，无需预留音圈的插入空间，减小整个发声装置的体积。下磁性件32安装在下磁碗34内，上磁性件31和下磁性件32之间的斥力抵消了上磁性件31和下磁碗34之间的吸力，使激励器在未通电时处于磁力静态平衡，避免镂空弹片2产生内应力，激励器通过两个同极相对布置的上磁性件31和下磁性件32，完全利用磁力平衡来达到各部件之间的静态平衡，无需额外的支撑结构，结构简单，易于实现，降低生产成本。
上磁性件31和下磁性件32同极相对布置，在未通电状态时，上磁性件31和下磁性件32之间的斥力与上磁性件31和下磁碗34之间的吸力相等以达到磁力静态平衡，避免镂空弹片2产生内应力，达到最优的保真效果。当在线圈36通电后，磁力静态平衡被打破，安装在镂空弹片2上的上磁碗33上下运动，带 动镂空弹片2上下振动。
实施例三：
如图7至9所示，为了使镂空弹片2不整片贴附于上磁碗33上，在本实施例中，优选的将上磁碗33设计为上磁碗33的底部表面积小于上磁性件31的底部表面积，激励器通过上磁碗33直接连接在镂空弹片2的内弹片21上，内弹片21、连接弹片23以及上磁碗33配合调整镂空弹片2的有效振动面积以调整装置的共振频率点。
具体的，上磁碗33的底部表面小于或等于内弹片21的表面积，上磁碗33调整镂空弹片与激励器在Z轴方向上的构架堆叠，并调整上磁性件31和下磁性件32之间的间隙。在镂空弹片2整体大小、厚度、材质不变的情况下，改变内弹片21的长宽和面积，进而改变连接弹片23的长度和面积，连接弹片23的长度和面积即为该镂空弹簧的有效振动面积，从而改变系统的共振频率点F0，灵活调整低频效果，共振频率点最低可以达到80Hz。同时，上磁碗33也可随内弹片21长宽和面积的改变而改变，由于F0变化会导致振幅变化，所以该上磁碗33的高度也需要做对应调整，完整连接镂空弹片2和上磁性件31的Z方向堆叠，同时调整上、下磁性件之间的间隙，使发声装置传递出的声音信号幅度适中，同时低音部分可以同步传递到耳道中，均衡整个声音频段，达到较好的声学效果，显著地提升用户体验和产品音质。
在本实施例中，上磁碗33无法容纳上磁性件，上磁性件31直接粘贴连接在上磁碗33上，线圈36通电后产生不同的磁场与上磁性件31配合为镂空弹片2振动提供驱动力，上磁性件31与上磁碗33之间无间隙配合，与传统的激励器相比，无需预留音圈的插入空间，减小整个发声装置的体积。下磁性件32安装在下磁碗34内，上磁性件31和下磁性件32之间的斥力抵消了上磁性件31和下磁碗34之间的吸力，使激励器在未通电时处于磁力静态平衡，避免镂空弹片2产生内应力，完全利用磁力平衡来达到各部件之间的静态平衡，无需额外的支撑结构，结构简单，易于实现，降低生产成本。
上磁性件31和下磁性件32同极相对布置，在未通电状态时，上磁性件31和下磁性件32之间的斥力与上磁性件31和下磁碗34之间的吸力相等以达到磁力静态平衡，避免镂空弹片2产生内应力，达到最优的保真效果。当在线圈36通电后，磁力静态平衡被打破，安装在镂空弹片2上的上磁碗33上下运动，带动镂空弹片2上下振动。
应该理解，以上描述是为了进行图示说明而不是为了进行限制。通过阅读上述描述，在所提供的示例之外的许多实施例和许多应用对本领域技术人员来说都将是显而易见的。因此，本教导的范围不应该参照上述描述来确定，而是应该参照前述权利要求以及这些权利要求所拥有的等价物的全部范围来确定。出于全面之目的，所有文章和参考包括专利申请和公告的公开都通过参考结合在本文中。在前述权利要求中省略这里公开的主题的任何方面并不是为了放弃该主体内容，也不应该认为申请人没有将该主题考虑为所公开的发明主题的一部分。
Claims (13)
- 一种骨传导发声装置，包括外部封装结构，所述外部封装结构内设置有中空腔体，其特征在于，所述中空腔体内设置有：镂空弹片，所述镂空弹片包括内弹片、套设在所述内弹片外的外弹片以及多个连接在所述内弹片和外弹片之间的连接弹片，所述外弹片嵌设在所述外部封装结构上；激励器，所述激励器包括上磁性件、下磁性件以及连接在所述上磁性件和镂空弹片之间的上磁碗，所述上磁性件和下磁性件在Z轴方向上平行相对且相互隔离设置；所述内弹片连接在所述激励器的上磁碗上，所述镂空弹片与所述上磁碗配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
- 根据权利要求1所述的骨传导发声装置，其特征在于，所述内弹片与外弹片被配置在水平方向相互错开的位置上，所述内弹片和连接弹片配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
- 根据权利要求2所述的骨传导发声装置，其特征在于，所述连接弹片倾斜设置，所述连接弹片的较高端连接至所述外弹片，所述连接弹片的较低端连接至所述内弹片，所述连接弹片调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
- 根据权利要求1所述的骨传导发声装置，其特征在于，所述上磁碗容纳所述上磁性件，所述上磁碗包括顶壁，所述顶壁设置有向上凸起的凸台，所述内弹片连接在所述凸台上，所述内弹片、连接弹片以及所述凸台配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
- 根据权利要求4所述的骨传导发声装置，其特征在于，所述凸台调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
- 根据权利要求1所述的骨传导发声装置，其特征在于，所述上磁碗的底 部表面积小于所述上磁性件的底部表面积，所述激励器通过所述上磁碗连接在所述内弹片上，所述内弹片、连接弹片以及上磁碗配合调整所述镂空弹片的有效振动面积以调整装置的共振频率点。
- 根据权利要求6所述的骨传导发声装置，其特征在于，所述上磁碗的底部表面小于或等于所述内弹片的表面积，所述上磁碗调整所述镂空弹片与所述激励器在Z轴方向上的构架堆叠，并调整所述上磁性件和下磁性件之间的间隙。
- 根据权利要求3或5或7所述的骨传导发声装置，其特征在于，所述激励器还包括容纳所述下磁性件的下磁碗，所述下磁性件通过所述下磁碗连接在所述中空腔体底部，所述上磁性件的磁通量大于或等于所述下磁性件的磁通量，所述上磁性件和下磁性件同极相对设置，在未通电时，所述上磁性件和下磁性件之间的斥力与所述上磁性件和下磁碗之间的吸力相等以保持磁力静态平衡。
- 根据权利要求8所述的骨传导发声装置，其特征在于，所述激励器还包括安装在所述下磁碗内且围绕所述下磁性件设置的线圈和设置在所述线圈和下磁碗之间的柔性电路板，所述柔性电路板一端与所述线圈相连，另一端延伸至所述外部封装结构外。
- 根据权利要求3或5或7所述的骨传导发声装置，其特征在于，所述上磁性件至少包括一个磁铁和/或所述下磁性件至少包括一个磁铁。
- 根据权利要求3或5或7所述的骨传导发声装置，其特征在于，所述间隙内填充有空气、阻尼材料、弹性件中的一种或多种。
- 根据权利要求3或5或7所述的骨传导发声装置，其特征在于，所述外部封装结构包括配置有中空腔体的外壳和盖设在所述外壳上的盖板，所述镂空弹片嵌设在所述外壳内且与所述盖板相对设置。
- 一种可穿戴设备，其特征在于，包括权利要求1至12任一项权利要求所述的骨传导发声装置。
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