WO2024021898A1 - 一种骨传导发声装置及电子设备 - Google Patents

一种骨传导发声装置及电子设备 Download PDF

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Publication number
WO2024021898A1
WO2024021898A1 PCT/CN2023/099049 CN2023099049W WO2024021898A1 WO 2024021898 A1 WO2024021898 A1 WO 2024021898A1 CN 2023099049 W CN2023099049 W CN 2023099049W WO 2024021898 A1 WO2024021898 A1 WO 2024021898A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
coil
bone conduction
conduction sound
generating device
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PCT/CN2023/099049
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English (en)
French (fr)
Inventor
陶志勇
刘彬
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苏州索迩电子技术有限公司
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Publication of WO2024021898A1 publication Critical patent/WO2024021898A1/zh

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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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to the field of bone conduction technology, and in particular to a bone conduction sound-generating device and electronic equipment.
  • Bone conduction sound-producing devices can produce sound through vibration and are often used in electronic devices such as bone conduction headphones and bone conduction glasses. For example, they are installed in the headphone heads of bone conduction headphones. When used, the headphone heads fit the skin of the human face, and bone conduction The vibration generated by the sound-generating device is transmitted to the skull through the panel of the earphone head, allowing people to hear the sound through bone conduction.
  • the Chinese utility model patent with announcement number CN214381340U discloses a bone conduction sound-generating device, as shown in Figure 11.
  • the bone conduction sound-generating device includes a shell 1, a cover plate 10, a hollow elastic piece 11, a spatial low-frequency adjustment plate 12, and an upper magnetic component. 13.
  • the upper magnetic component 13 is located in the upper magnetic bowl 14, the lower magnetic component 15 is located in the lower magnetic bowl 16, and the upper magnetic component 13 and
  • the lower magnetic parts 15 are arranged opposite to each other with the same pole, and there is a repulsive force between them. This repulsive force is balanced with the attraction force between the magnetic part and the magnetic bowl.
  • the applicant's research found that due to the repulsive force between the upper magnetic component 13 and the lower magnetic component 15, when the bone conduction sound-generating device with the above structure is subjected to a drop test, when the hollow elastic piece 11 is slightly deformed due to impact, the magnetic force of the upper and lower components will The balance is destroyed. When the hollow elastic piece 11 deviates from the equilibrium position due to deformation, the repulsive force between the upper magnetic component 13 and the lower magnetic component 15 will increase rapidly. At this time, the repulsive force is too large, resulting in excessive rebound force, which intensifies the hollowing out. There is a risk of permanent deformation of the shrapnel 11.
  • the hollow shrapnel 11 will protrude upward, and the repulsive force will further aggravate the deformation of the hollow shrapnel 11, resulting in performance failure.
  • When vibrating upward it may touch the upper end cover 23 or other parts, causing noise. And other issues.
  • the reliability of the bone conduction sound-generating device is not ideal, which is not only difficult to pass the drop reliability test, but also may damage the hollow shrapnel 11 during an accidental drop or impact, affecting the performance of the bone conduction sound-generating device.
  • the object of the present invention is to provide a bone conduction sound generating device and electronic equipment, which have better reliability.
  • the present invention proposes a bone conduction sound-generating device, including:
  • a shell is provided with an inner cavity, and the shell is made of non-magnetic conductive material;
  • a magnetic component is provided in the inner cavity and connected to the elastic piece;
  • a coil is disposed in the inner cavity and relatively fixed to the shell.
  • the first end surface of the coil is opposite to the second end surface of the magnetic component, and there is a first separation space between them.
  • the bone conduction sound-generating device further includes a magnetic conductive member connected to the second end surface, the magnetic conductive member extends into the coil hole of the coil, and the magnetic conductive member is in contact with the coil.
  • the gap between holes is greater than or equal to 0.05mm.
  • the housing includes an end plate, the coil is connected to the end plate, and the distance between the magnetic conductive member and the end plate is less than or equal to the distance between the magnetic member and the coil.
  • the end plate is made of non-magnetic conductive material.
  • the magnetic component and the coil are coaxially arranged, and the ratio of the area enclosed by the outer contour of the cross-section of the magnetic component to the area enclosed by the outer contour of the cross-section of the coil is 0.5 to 1.3 .
  • the ratio of the area enclosed by the outer contour of the cross-section of the magnetic component to the area enclosed by the outer contour of the cross-section of the coil is 0.6 to 0.95.
  • the elastic piece is made of non-magnetic conductive material, which includes an outer bracket connected to the outer shell, an inner bracket connected to the magnetic component, and an elastic member connected between the outer bracket and the inner bracket. arm.
  • the casing includes a tubular casing and an end plate connected to an end of the casing, and the coil is connected to the end plate.
  • the housing further includes an end cover, the end cover and the end plate are respectively connected to two ends of the housing, and the elastic piece is located in the inner cavity.
  • outer bracket and the end plate are connected to both ends of the housing respectively.
  • the bone conduction sound-generating device further includes a low-frequency adjustment plate connected between the magnetic component and the inner bracket, and the low-frequency adjustment plate does not contact the elastic arm.
  • the bone conduction sound-generating device further includes a magnetic conductive bowl, the magnetic component is provided in the magnetic conductive bowl, and the magnetic conductive bowl is connected to the inner bracket.
  • the bone conduction sound-generating device further includes a low-frequency adjustment plate connected between the magnetically conductive bowl and the inner bracket, and the low-frequency adjustment plate does not contact the elastic arm.
  • the present invention also provides an electronic device, including the bone conduction sound-generating device as described in any one of the above.
  • the present invention has the following beneficial effects:
  • the bone conduction sound-generating device eliminates the lower magnetic bowl and lower magnetic parts in the prior art, and the outer shell is made of non-magnetic conductive material. In this way, the magnetic parts connected to the elastic piece are no longer affected by the lower magnetic bowl and lower magnetic parts. The attraction of the shell and the repulsion of the lower magnetic parts make it easier to maintain static balance. Since the magnetic parts are no longer subject to repulsive force, they are less likely to cause permanent deformation of the shrapnel due to excessive rebound force when dropped or impacted. The bone conduction sound-generating device has better reliability and is easier to pass the drop test. In addition, the structure of the bone conduction sound-generating device is simpler, which can simplify the assembly steps, improve production efficiency, and reduce costs.
  • the bone conduction sound-generating device is equipped with a magnetic conductive piece connected to the magnetic piece and extending into the coil hole, which can guide the magnetic induction lines to pass through the coil more concentratedly, making higher utilization of the magnetic field, which is conducive to increasing the Large driving force, improved sensitivity.
  • Figure 1 is a schematic three-dimensional view of the bone conduction sound-generating device in Embodiment 1 of the present invention.
  • Figure 2 is a top view of the bone conduction sound-generating device in Embodiment 1 of the present invention.
  • FIG. 3 is a cross-sectional view taken along line A-A in FIG. 2 .
  • Figure 4 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 2 of the present invention.
  • Figure 5 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 3 of the present invention.
  • Figure 6 is a three-dimensional cross-sectional view of the bone conduction sound-generating device in Embodiment 3 of the present invention.
  • Figure 7 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 4 of the present invention.
  • Figure 8 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 5 of the present invention.
  • Figure 9 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 6 of the present invention.
  • Figure 10 is a cross-sectional view of the bone conduction sound-generating device in Embodiment 7 of the present invention.
  • Figure 11 is a cross-sectional view of a bone conduction sound-generating device in the prior art.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • the present invention proposes a bone conduction sound-generating device, which includes a shell 2 , a spring piece 3 , a magnetic component 4 and a coil 5 .
  • the shell 2 is provided with an inner cavity 20, which can be integrally formed or connected by multiple parts.
  • the elastic piece 3 is connected to the shell 2 and is used to provide a restoring force to drive the magnetic component 4 to reset.
  • the elastic piece 3 is made of non-magnetic material, such as non-magnetic metal and alloy (such as stainless steel, alloy copper, beryllium copper, phosphorus). Bronze), polymer materials (such as plastic) or polymer composite materials, etc.
  • the elastic piece 3 includes an annular outer bracket 30 , an inner bracket 31 located inside the outer bracket 30 , and several elastic arms 32 connected between the outer bracket 30 and the inner bracket 31 .
  • the outer bracket 30 is connected to the outer shell 2, the elastic arm 32 and the inner bracket 31 are suspended, and the magnetic component 4 is connected to the inner bracket 31. When the inner bracket 31 deviates from the original position, the elastic arm 32 deforms, thereby providing the drive inner bracket 31 and the magnetic Part 4 resets the elasticity.
  • the coil 5 is disposed in the inner cavity 20 and connected to the shell 2. It can be indirectly connected to the shell 2 through other components, or directly connected to the shell 2.
  • the coil 5 is relatively fixed to the housing 2 and is relatively spaced apart from the magnetic component 4.
  • the first end surface 50 of the coil 5 and the second end surface 40 of the magnetic component 4 are relatively disposed with a first separation space 52 between them.
  • the coil 5 generates a magnetic field after being energized, and the magnetic component 4 vibrates under the interaction with the magnetic field.
  • the first spacing space 52 is used to provide a space for the magnetic component 4 to vibrate to prevent the magnetic component 4 from colliding with the coil 5 .
  • the shell 2 is made of non-magnetic material, for example, non-magnetic metal, alloy (such as stainless steel, alloy copper, beryllium copper, phosphor bronze), polymer material (such as plastic) or polymer composite material etc.
  • the housing 2 is made of non-magnetic stainless steel, and the housing 2 made of non-magnetic material will not be attracted by the magnetic component 4 .
  • the shrapnel 3 When dropped or hit, the shrapnel 3 will not be permanently deformed due to excessive rebound displacement due to the repulsive force, and the reliability of the bone conduction sound-generating device is better. , easier to pass the drop test.
  • the bone conduction sound-generating device has fewer parts, which can simplify the assembly process and reduce costs.
  • the bone conduction sound-generating device also includes a magnetic conductive component 41 connected to the second end surface 40.
  • the magnetic conductive component 41 extends into the coil hole 51 of the coil 5.
  • the magnetic conductive member 41 is made of magnetic conductive material. It does not have magnetism to attract iron products, but it can guide magnetic flux lines. When the magnetic component 4 vibrates, the magnetic conductive component 41 extending into the coil 5 also vibrates synchronously, and the magnetic induction lines derived therefrom can pass through the coil 5 in a more concentrated manner, thereby generating additional driving force and improving the performance of the bone conduction sound-generating device. sensitivity.
  • the magnetically permeable material can be, for example, SPCC or SPCE.
  • the cross-sectional contour shape of the magnetic conductive member 41 is preferably consistent with the cross-sectional contour shape of the coil hole 51 .
  • the magnetic conductive member 41 is cylindrical.
  • the magnetic conductive member 41 and the coil hole 51 have a clearance fit to prevent the coil 5 from interfering with the movement of the magnetic conductive member 41.
  • the gap between the magnetic conductive member 41 and the coil hole 51 is greater than or equal to 0.05mm to effectively reduce the friction between the magnetic conductive member 41 and the coil. Risk of wall contact of hole 51.
  • the magnetic component 4 and the coil 5 are arranged coaxially so that the magnetic component 4 receives a more balanced force and can vibrate along the axis to prevent twisting during vibration.
  • the outer contour shapes of the cross-sections of the magnetic component 4 and the coil 5 are the same, and the cross-section is a section taken from a plane perpendicular to the axis 53 of the coil 5 (see Figure 3 for the label).
  • the magnetic component 4 is cylindrical
  • the coil 5 is annular, and the outer contours of the cross-sections of the two are
  • the magnetic element 4 is in the shape of a rectangular parallelepiped
  • the coil 5 is in the shape of a rectangular ring
  • the outer contours of the cross-sections of both are rectangular.
  • the cross-sectional profile size of the magnetic component 4 is larger than the cross-sectional profile size of the coil hole 51 .
  • the ratio of the area enclosed by the outer contour of the cross-section of the magnetic component 4 to the area enclosed by the outer contour of the cross-section of the coil 5 is 0.5 to 1.3, so that the inner cavity 20 can be more fully utilized. space to ensure vibration sensitivity. It is further preferred that the ratio of the area enclosed by the outer contour of the cross-section of the magnetic member 4 to the area enclosed by the outer contour of the cross-section of the coil 5 is 0.6 to 0.95, so that the coil 5 has sufficient driving force and does not cause the coil 5 to have sufficient driving force. Because the volume of the magnetic component 4 is too large, the overall volume of the bone conduction sound-generating device is increased.
  • the bone conduction sound-generating device includes a shell 2, a spring piece 3, a magnetic component 4 and a coil 5.
  • the casing 2 includes a casing 21 and an end plate 22.
  • the casing 21 is in the shape of a tube, specifically a round tube. It can be understood that in other embodiments, the casing 21 can also be in other shapes, such as a square tube with a track-shaped cross-section. shaped tubular etc. Both ends of the housing 21 are open, and the end plates 22 are connected to the ends of the housing 21 , for example, by welding or adhesive connection.
  • the housing 21 and the end plate 22 enclose an inner cavity 20 with one end open. In order to prevent the impact of the housing 2 on the magnetic component 4, the housing 21 and the end plate 22 are made of non-magnetic conductive materials.
  • the elastic piece 3 includes an annular outer bracket 30 , an inner bracket 31 located inside the outer bracket 30 , and three elastic arms 32 connected between the outer bracket 30 and the inner bracket 31 .
  • the outer bracket 30 and the end plate 22 are connected to both ends of the housing 21 respectively.
  • the elastic arm 32 is in an arc-shaped strip shape to have a larger length and can provide a larger amplitude.
  • the inner bracket 31 is disk-shaped.
  • the magnetic component 4 is cylindrical and connected to the inner bracket 31 .
  • a low-frequency adjustment plate 7 is provided between the magnetic component 4 and the inner bracket 31.
  • the low-frequency adjustment plate 7 can reduce the resonant frequency of the bone conduction sound device, thereby improving the low frequency performance of the bone conduction sound device.
  • the low-frequency adjustment plate 7 does not contact the elastic arm 32.
  • its outer contour can be set not to exceed the outer contour of the inner bracket 31, so as to prevent the low-frequency adjustment plate 7 from hindering the deformation of the elastic arm 32 during vibration.
  • the coil 5 is annular in shape and is disposed in the inner cavity 20 and connected to the end plate 22 .
  • the first end surface 50 of the coil 5 is parallel to and opposite to the second end surface 40 of the magnetic component 4, with a first separation space 52 between them.
  • the magnetic component 4 and the coil 5 are arranged coaxially.
  • the ratio of the diameter D1 of the magnetic component 4 to the diameter D2 of the coil 5 is 0.6 to 0.95, that is, the area enclosed by the outer contour of the cross-section of the magnetic component 4 and the cross-section of the coil 5
  • the ratio of the area enclosed by the outer contour is 0.6 to 0.95.
  • the cover plate and magnetic bowl in the prior art are further omitted, further simplifying the structure and assembly process.
  • the bone conduction sound-generating device further includes a magnetic conductive member 41 .
  • the magnetic conductive member 41 is connected to the second end surface 40 of the magnetic member 4 and extends into the coil hole 51 of the coil 5 .
  • the magnetically conductive member 41 is cylindrical and fits with the circular coil hole 51 with a clearance.
  • the height H2 of the second separation space 42 (ie, the distance between the magnetic conductive member 41 and the end plate 22) is less than or equal to the height H1 of the first separation space 52 (ie, the distance between the magnetic member 4 and the coil 5), In this way, the magnetic conductive member 41 can play a limiting role.
  • the magnetic conductive member 41 contacts the end plate 22, the magnetic member 4 is just in contact with the coil 5 or has not yet contacted the coil 5, which can prevent The brittle magnetic part 4 collides with the coil 5 and is damaged.
  • the difference between this embodiment and Embodiment 2 is that in this embodiment, the bone conduction sound-generating device further includes a magnetic bowl 6 .
  • the magnetically conductive bowl 6 is in the shape of an inverted bowl and is provided with a receiving cavity 60.
  • the magnetic component 4 is installed in the receiving cavity 60.
  • the two can be connected by adhesive, for example.
  • the lower end surface 62 of the magnetically conductive bowl 6 It is flush with the second end surface 40 of the magnetic component 4 .
  • the magnetically conductive bowl 6 is made of magnetically conductive material like the magnetically conductive member 41, and can guide the magnetic flux lines so that the magnetic flux lines pass through the coil in a more concentrated manner. In this way, the driving force of the coil 5 on the magnetic component 4 is greater, and the sensitivity of the bone conduction sound-generating device is higher.
  • the low-frequency adjustment plate 7 is connected between the magnetic bowl 6 and the inner bracket 31 to prevent contact between the magnetic bowl 6 and the elastic arm 32 during vibration, thereby improving the low-frequency performance of the bone conduction sound-generating device.
  • the difference between this embodiment and Embodiment 3 is that this embodiment does not set low-frequency adjustment.
  • the plate 7 is provided with a protruding first boss 61 on the surface of the magnetic bowl 6 facing the elastic piece 3 .
  • the first boss 61 is integrally formed on the magnetic bowl 6 .
  • the magnetic bowl 6 is connected to the inner bracket 31 through its first boss 61 and can play the same role as the low-frequency adjustment plate 7 . It is also preferred that the first boss 61 does not contact the elastic arm 32 so as not to affect the deformation of the elastic arm 32. As shown in FIG. 7, the outer contour of the first boss 61 is set not to exceed the outer contour of the inner bracket 31.
  • the difference between this embodiment and Embodiment 3 is that in this embodiment, the housing 2 also includes an end cover 23 .
  • the end caps 23 and the end plates 22 are respectively connected to both ends of the housing 21. In this way, the two open ends of the housing 21 are sealed by the end caps 23 and the end plates 22 respectively. It can be understood that the open ends can be set as needed. Be completely sealed or leave gaps.
  • the elastic piece 3 is connected to the housing 21 and is completely contained in the inner cavity 20 .
  • the housing 21 is provided with a step portion 210 close to the end cover 23.
  • the outer bracket 30 of the elastic piece 3 is fixedly connected to the step portion 210, for example, by gluing or welding.
  • the end cap 23 and the stepped portion 210 cooperate with the outer bracket 30 that clamps the elastic piece 3 to further improve the firmness of the connection of the elastic piece 3 .
  • this embodiment is a change based on Embodiment 3.
  • the difference from Embodiment 1 is that in this embodiment, the shell 21 and the end plate 22 of the housing 2 are integrally formed.
  • this embodiment is a change based on Embodiment 1.
  • This embodiment does not provide a low-frequency adjustment plate 7, but on the surface of the magnetic member 4 facing the elastic piece 3
  • An outwardly protruding second boss 43 is provided, and the second boss 43 is integrally formed on the magnetic component 4 .
  • the magnetic component 4 is connected to the inner bracket 31 through its second boss 43 and can play the same role as the low-frequency adjustment plate 7 . It is also preferred that the second boss 43 does not contact the elastic arm 32 so as not to affect the deformation of the elastic arm 32. As shown in FIG. 10, the outer contour of the second boss 43 does not exceed the outer contour of the inner bracket 31.
  • the present invention also provides an electronic device, which includes the above-mentioned bone conduction sound-generating device.
  • the electronic device may be, for example, bone conduction headphones, bone conduction glasses, or other head-mounted devices.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
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  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

本发明公开了一种骨传导发声装置和电子设备，该骨传导发声装置包括外壳(2)、弹片(3)、磁性件(4)和线圈(5)，外壳(2)设有内腔(20)，所述外壳(2)采用非导磁材料制成；弹片(3)与所述外壳(2)相连；磁性件(4)设于所述内腔(20)内且与所述弹片(3)相连；线圈(5)设于所述内腔(20)内且与所述外壳(2)相对固定，所述线圈(5)的第一端面(50)与所述磁性件(4)的第二端面(40)相对设置，且两者之间具有第一间隔空间(52)。本发明的骨传导发声装置可靠性更好，更容易通过跌落测试，且结构更为简单。

Description

一种骨传导发声装置及电子设备
优先权信息：本申请要求于2022年7月28日提交的申请号为202221965203.0的中国专利申请的优先权。
技术领域
本发明涉及骨传导技术领域，尤其涉及一种骨传导发声装置及电子设备。
背景技术
骨传导发声装置能够通过振动发声，常用于骨传导耳机和骨传导眼镜等电子设备中，例如，设置在骨传导耳机的耳机头中，使用时，耳机头与人脸部皮肤贴合，骨传导发声装置产生的振动，通过耳机头的面板传递至颅骨，通过骨传导的方式使人听到声音。
公告号为CN214381340U的中国实用新型专利公开了一种骨传导发声装置，如图11所示，该骨传导发声装置包括外壳1、盖板10、镂空弹片11、空间低频调节板12、上磁性件13、上磁碗14、下磁性件15、下磁碗16和线圈17，上磁性件13设于上磁碗14内，下磁性件15设于下磁碗16内，且上磁性件13和下磁性件15同极相对设置，两者之间存在斥力，该斥力与磁性件和磁碗之间的吸力相平衡。
申请人研究发现，由于上磁性件13和下磁性件15之间存在斥力，因此上述结构的骨传导发声装置在进行跌落测试时，当镂空弹片11因为冲击发生轻微变形，此时上下组件的磁力平衡被破坏，当镂空弹片11由于变形偏移平衡位置时，会导致上磁性件13和下磁性件15之间的斥力迅速加大，此时因斥力过大导致反弹力过大，加剧了镂空弹片11发生永久变形的风险，镂空弹片11会向上突出，而且斥力会进一步加剧镂空弹片11的变形导致性能失效，在向上振动时可能会碰触到上方的端盖23或者其他零部件从而出现杂音等问题。这样，骨传导发声装置的可靠性不甚理想，不仅不利于通过跌落可靠性测试，而且在例如发生意外跌落或者撞击的过程中，也可能损坏镂空弹片11，影响骨传导发声装置的性能。
因此，有必要对现有技术予以改良以克服现有技术中的所述缺陷。
发明内容
本发明的目的在于提供一种骨传导发声装置及电子设备，该骨传导发声装置的可靠性更好。
为实现上述发明目的，一方面，本发明提出了一种骨传导发声装置，包括：
外壳，设有内腔，所述外壳采用非导磁材料制成；
弹片，与所述外壳相连；
磁性件，设于所述内腔内且与所述弹片相连；以及，
线圈，设于所述内腔内且与所述外壳相对固定，所述线圈的第一端面与所述磁性件的第二端面相对设置，且两者之间具有第一间隔空间。
进一步地，所述的骨传导发声装置还包括连接在所述第二端面上的导磁件，所述导磁件延伸至所述线圈的线圈孔内，且所述导磁件与所述线圈孔之间的间隙大于等于0.05mm。
进一步地，所述外壳包括端板，所述线圈连接于所述端板上，所述导磁件与所述端板之间的距离小于等于所述磁性件与所述线圈之间的距离。
进一步地，所述端板采用非导磁材料制成。
进一步地，所述磁性件和所述线圈同轴设置，且所述磁性件的横截面的外轮廓围合的面积与所述线圈的横截面的外轮廓围合的面积的比值为0.5～1.3。
进一步地，所述磁性件的横截面的外轮廓围合的面积与所述线圈的横截面的外轮廓围合的面积的比值为0.6～0.95。
进一步地，所述弹片采用非导磁材料制成，其包括与所述外壳相连的外支架、与所述磁性件相连的内支架以及连接在所述外支架和所述内支架之间的弹性臂。
进一步地，所述外壳包括管状的壳体和连接在所述壳体端部的端板，所述线圈与所述端板相连。
进一步地，所述外壳还包括端盖，所述端盖和所述端板分别连接在所述壳体的两端，所述弹片位于所述内腔内。
进一步地，所述外支架和所述端板分别连接在所述壳体的两端。
进一步地，所述的骨传导发声装置还包括连接在所述磁性件和所述内支架之间的低频调节板，所述低频调节板不与所述弹性臂接触。
进一步地，所述的骨传导发声装置还包括导磁碗，所述磁性件设于所述导磁碗内，所述导磁碗与所述内支架相连。
进一步地，所述的骨传导发声装置还包括连接在所述导磁碗和所述内支架之间的低频调节板，所述低频调节板不与所述弹性臂接触。
另一方面，本发明还提出了一种电子设备，包括如上任一项所述的骨传导发声装置。
与现有技术相比，本发明具有如下有益效果：
1.本发明中，骨传导发声装置取消了现有技术中的下磁碗和下磁性件，且外壳采用非导磁材料制成，这样，与弹片相连的磁性件不再受到下磁碗和外壳的吸引力以及下磁性件的排斥力，更容易保持静力平衡。由于磁性件不再受到斥力的作用，在跌落或者受到冲击时，不易因为反弹力过大而导致弹片的永久变形，骨传导发声装置的可靠性更好，更容易通过跌落测试。另外，骨传导发声装置的结构更为简单，能够简化组装步骤，提高生产效率，降低成本。
2.作为改进，骨传导发声装置设置有与磁性件相连且延伸至线圈孔内的导磁件，能够引导磁感线更为集中的穿过线圈，对磁场的利用率更高，有利于增大驱动力，提高灵敏度。
附图说明
图1是本发明实施例1中骨传导发声装置的立体示意图。
图2是本发明实施例1中骨传导发声装置的俯视图。
图3是沿图2中A-A剖切线剖得的剖视图。
图4是本发明实施例2中骨传导发声装置的剖视图。
图5是本发明实施例3中骨传导发声装置的剖视图。
图6是本发明实施例3中骨传导发声装置的立体剖视图。
图7是本发明实施例4中骨传导发声装置的剖视图。
图8是本发明实施例5中骨传导发声装置的剖视图。
图9是本发明实施例6中骨传导发声装置的剖视图。
图10是本发明实施例7中骨传导发声装置的剖视图。
图11是现有技术中骨传导发声装置的剖视图。
具体实施方式
为使本申请的上述目的、特征和优点能够更为明显易懂，下面结合附图，对本申请的具体实施方式做详细的说明。可以理解的是，此处所描述的具体实施例仅用于解释本申请，而非对本申请的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本申请相关的部分而非全部结构。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
本申请中的术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
如图1至图10所示，本发明提出了一种骨传导发声装置，其包括外壳2、弹片3、磁性件4和线圈5。
外壳2设有内腔20，其可以是一体成型的，也可以通过多个零件连接而成。
弹片3与外壳2相连，用于提供驱动磁性件4复位的复位力，弹片3采用非导磁材料制成，例如可以采用不导磁的金属、合金(例如不锈钢，合金铜，铍铜，磷青铜)、高分子材料(例如塑料)或者高分子复合材料等。作为一种优选的实施方式，弹片3包括环状的外支架30、位于外支架30内的内支架31以及连接在外支架30和内支架31之间的若干弹性臂32。外支架30与外壳2相连，弹性臂32和内支架31悬空设置，磁性件4与内支架31相连，当内支架31偏离原位时，弹性臂32发生变形，从而提供驱动内支架31和磁性件4复位的弹力。
线圈5设于内腔20内且与外壳2相连，其可以通过其他零部件与外壳2间接连接，也可以与外壳2直接连接。线圈5与外壳2相对固定，且与磁性件4相对间隔设置，具体的，线圈5的第一端面50和磁性件4的第二端面40相对设置，两者之间具有第一间隔空间52。线圈5通电后产生磁场，磁性件4在与磁场的相互作用下发生振动，第一间隔空间52用于提供供磁性件4振动的空间，以防止磁性件4与线圈5发生碰撞。
本发明中，外壳2采用非导磁材料制成，例如可以采用不导磁的金属、合金(例如不锈钢，合金铜，铍铜，磷青铜)、高分子材料(例如塑料)或者高分子复合材料等，优选的，外壳2采用不导磁不锈钢制成，非导磁材料制成的外壳2不会受到磁性件4的吸引。相比于现有技术中设置下磁碗和下磁性件的结构，本申请中不存在施加于磁性件4的吸引力和斥力，同时磁性件4与外壳2之间也不存在磁力的影响，因此，能够更轻易的保持磁性件4的静态平衡，在遇到跌落或者撞击时，不会因为斥力的存在导致弹片3因反弹位移过大而发生永久变形，骨传导发声装置的可靠性更好，更容易通过跌落测试。另外，骨传导发声装置的零件数量更少，能够简化组装工艺，降低成本。
如图4和图5所示，为了增大线圈5对磁性件4的驱动力，在一些实施例中，骨传导发声装置还包括连接在第二端面40上的导磁件41，导磁件41延伸至线圈5的线圈孔51内，导磁件41采用导磁材料制成，其本身不具有吸引铁制品的磁性，但是能够引导磁感线。在磁性件4振动时，伸入线圈5内的导磁件41也同步振动，其导出的磁感线能够更为集中的穿过线圈5，从而产生额外的驱动力，提高骨传导发声装置的灵敏度。导磁材料例如可以是SPCC或者SPCE等。
导磁件41的横截面轮廓形状优选与线圈孔51的横截面轮廓形状一致，例如在线圈孔51为圆孔时，导磁件41呈圆柱形。导磁件41与线圈孔51间隙配合，以防止线圈5干涉导磁件41的运动，导磁件41与线圈孔51之间的间隙大于等于0.05mm，以有效地降低导磁件41与线圈孔51的孔壁接触的风险。
磁性件4与线圈5同轴设置，以使得磁性件4受力更为均衡，能够沿着轴线振动，防止在振动时发生扭摆。优选的，磁性件4与线圈5的横截面的外轮廓形状相同，横截面为由与线圈5的轴线53(标号见图3)垂直的平面截得的截面。例如，当磁性件4为圆柱形时，线圈5呈圆环形，两者横截面的外轮廓形 状均为圆形，当磁性件4呈长方体状时，线圈5呈矩环形，两者横截面的外轮廓形状均为矩形。
优选的，磁性件4的横截面轮廓尺寸大于线圈孔51的横截面轮廓尺寸。作为一种优选的实施方式，磁性件4的横截面的外轮廓围合的面积与线圈5的横截面的外轮廓围合的面积的比值为0.5～1.3，能够更为充分地利用内腔20的空间，保证振动的灵敏度。进一步优选的，磁性件4的横截面的外轮廓围合的面积与线圈5的横截面的外轮廓围合的面积的比值为0.6～0.95，以使得线圈5具有充足的驱动力，且不至于因为磁性件4的体积过大增大骨传导发声装置的整体体积。
以下以若干具体实例做进一步地详细说明。
实施例1
如图1至图3所示，骨传导发声装置包括外壳2、弹片3、磁性件4和线圈5。
外壳2包括壳体21和端板22，壳体21呈管状，具体为圆管状，可以理解的是，在其他实施例中，壳体21也可以是其他形状的，例如方管状、截面为跑道形的管状等。壳体21的两端开口，端板22连接在壳体21的端部，例如可以通过焊接或者胶粘连接等方式相连。壳体21和端板22围合形成一端开口的内腔20。为了防止外壳2对磁性件4的影响，壳体21和端板22均采用非导磁材料制成。
弹片3包括环状的外支架30、位于外支架30内的内支架31以及连接在外支架30和内支架31之间的三条弹性臂32。外支架30和端板22分别连接在壳体21的两端。弹性臂32呈弧形的条状，以具有更大的长度，能够提供更大的振幅。内支架31呈圆板状。
磁性件4呈圆柱形，其与内支架31相连。如图3所示，在磁性件4和内支架31之间设置有低频调节板7，通过低频调节板7能够降低骨传导发声装置的共振频率，从而提高骨传导发声装置的低频性能。优选的，低频调节板7不与弹性臂32接触，例如可以将其外轮廓设置成不超出内支架31的外轮廓，以免振动时低频调节板7阻碍弹性臂32的变形。
线圈5呈圆环状，其设于内腔20内且连接在端板22上。线圈5的第一端面50与磁性件4的第二端面40平行且相对设置，两者之间具有第一间隔空间52。 磁性件4和线圈5同轴线设置，磁性件4的直径D1和线圈5的直径D2的比值为0.6～0.95，即磁性件4的横截面的外轮廓围合的面积与线圈5的横截面的外轮廓围合的面积的比值为0.6～0.95。
本实施例中，进一步省去了现有技术中的盖板和导磁碗，进一步简化了结构和装配工艺。
实施例2
如图4所示，本实施例与实施例1的区别在于，本实施例中，骨传导发声装置还包括导磁件41。
导磁件41连接在磁性件4的第二端面40上，且延伸至线圈5的线圈孔51内。导磁件41呈圆柱形，其与圆形的线圈孔51间隙配合。
可以理解的是，导磁件41与端板22之间具有第二间隔空间42，以防止振动时导磁件41与端板22接触。
优选的，第二间隔空间42的高度H2(即导磁件41与端板22之间的距离)小于等于第一间隔空间52的高度H1(即磁性件4与线圈5之间的距离)，这样，导磁件41能够起到限位的作用，在导磁件41与端板22接触时，磁性件4刚好与线圈5接触或者还未与线圈5接触，能够防止在较为极端的情况下较脆的磁性件4与线圈5撞击而损坏。
实施例3
如图5和图6所示，本实施例与实施例2的区别在于，本实施例中，骨传导发声装置还包括导磁碗6。
导磁碗6呈倒扣的碗状，其设有收容腔60，磁性件4安装在收容腔60内，两者例如可以通过胶粘的方式相连，优选的，导磁碗6的下端面62与磁性件4的第二端面40平齐。导磁碗6和导磁件41一样采用导磁材料制成，能够引导磁感线，使磁感线更为集中的穿过线圈。这样，线圈5对磁性件4的驱动力更大，骨传导发声装置的灵敏度更高。
低频调节板7连接在导磁碗6和内支架31之间，能够防止振动时导磁碗6与弹性臂32之间的接触，提高骨传导发声装置的低频性能。
实施例4
如图7所示，本实施例与实施例3的区别在于，本实施例未设置低频调节 板7，而在导磁碗6朝向弹片3的表面上设置有外凸的第一凸台61，第一凸台61一体成型在导磁碗6上。导磁碗6通过其第一凸台61与内支架31相连，能够起到与低频调节板7相同的作用。同样优选的，第一凸台61不与弹性臂32接触，以免影响弹性臂32的变形，如图7所示，第一凸台61的外轮廓被设置成不超出内支架31的外轮廓。
实施例5
如图8所示，本实施例与实施例3的区别在于，本实施例中，外壳2还包括端盖23。
端盖23和端板22分别连接在壳体21的两端，这样，壳体21的两个开口端分别被端盖23和端板22封住，可以理解的是，开口端可以视需要设置成被完全封住或者留出空隙。
本实施例中，弹片3与壳体21相连，且完全收容在内腔20中。壳体21靠近端盖23的位置设置有台阶部210，弹片3的外支架30固定连接在台阶部210上，例如可以通过胶粘或者焊接的方式相连。端盖23和台阶部210配合夹持弹片3的外支架30，以进一步提高弹片3连接的牢固性。
实施例6
如图9所示，本实施例为在实施例3的基础上进行的变化，与实施例1的区别在于，本实施例中，外壳2的壳体21和端板22是一体成型的。
实施例7
如图10所示，本实施例为在实施例1的基础上进行的变化，与实施例1的区别在于，本实施例未设置低频调节板7，而在磁性件4朝向弹片3的表面上设置有外凸的第二凸台43，第二凸台43一体成型在磁性件4上。磁性件4通过其第二凸台43与内支架31相连，能够起到与低频调节板7相同的作用。同样优选的，第二凸台43不与弹性臂32接触，以免影响弹性臂32的变形，如图10所示，第二凸台43的外轮廓不超出内支架31的外轮廓。
本发明还提出了一种电子设备，该电子设备包括上文所述的骨传导发声装置。电子设备例如可以是骨传导耳机、骨传导眼镜或者其他的头戴设备等。
上述仅为本发明的具体实施方式，其它基于本发明构思的前提下做出的任何改进都视为本发明的保护范围。

Claims (14)

  1. 一种骨传导发声装置，其特征在于，包括：
    外壳(2)，设有内腔(20)，所述外壳(2)采用非导磁材料制成；
    弹片(3)，与所述外壳(2)相连；
    磁性件(4)，设于所述内腔(20)内且与所述弹片(3)相连；以及，
    线圈(5)，设于所述内腔(20)内且与所述外壳(2)相对固定，所述线圈(5)的第一端面(50)与所述磁性件(4)的第二端面(40)相对设置，且两者之间具有第一间隔空间(52)。
  2. 如权利要求1所述的骨传导发声装置，其特征在于，其还包括连接在所述第二端面(40)上的导磁件(41)，所述导磁件(41)延伸至所述线圈(5)的线圈孔(51)内，且所述导磁件(41)与所述线圈孔(51)之间的间隙大于等于0.05mm。
  3. 如权利要求2所述的骨传导发声装置，其特征在于，所述外壳(2)包括端板(22)，所述线圈(5)连接于所述端板(22)上，所述导磁件(41)与所述端板(22)之间的距离小于等于所述磁性件(4)与所述线圈(5)之间的距离。
  4. 如权利要求3所述的骨传导发声装置，其特征在于，所述端板(22)采用非导磁材料制成。
  5. 如权利要求1所述的骨传导发声装置，其特征在于，所述磁性件(4)和所述线圈(5)同轴设置，且所述磁性件(4)的横截面的外轮廓围合的面积与所述线圈(5)的横截面的外轮廓围合的面积的比值为0.5～1.3。
  6. 如权利要求5所述的骨传导发声装置，其特征在于，所述磁性件(4)的横截面的外轮廓围合的面积与所述线圈(5)的横截面的外轮廓围合的面积的比值为0.6～0.95。
  7. 如权利要求1至6任一项所述的骨传导发声装置，其特征在于，所述弹片(3)采用非导磁材料制成，其包括与所述外壳(2)相连的外支架(30)、与所述磁性件(4)相连的内支架(31)以及连接在所述外支架(30)和所述内支架(31)之间的弹性臂(32)。
  8. 如权利要求7所述的骨传导发声装置，其特征在于，所述外壳(2)包括管状的壳体(21)和连接在所述壳体(21)端部的端板(22)，所述线圈(5)与所述端板(22)相连。
  9. 如权利要求8所述的骨传导发声装置，其特征在于，所述外壳(2)还包括端盖(23)，所述端盖(23)和所述端板(22)分别连接在所述壳体(21)的两端，所述弹片(3)位于所述内腔(20)内。
  10. 如权利要求8所述的骨传导发声装置，其特征在于，所述外支架(30)和所述端板(22)分别连接在所述壳体(21)的两端。
  11. 如权利要求7所述的骨传导发声装置，其特征在于，其还包括连接在所述磁性件(4)和所述内支架(31)之间的低频调节板(7)，所述低频调节板(7)不与所述弹性臂(32)接触。
  12. 如权利要求7所述的骨传导发声装置，其特征在于，其还包括导磁碗(6)，所述磁性件(4)设于所述导磁碗(6)内，所述导磁碗(6)与所述内支架(31)相连。
  13. 如权利要求12所述的骨传导发声装置，其特征在于，其还包括连接在所述导磁碗(6)和所述内支架(31)之间的低频调节板(7)，所述低频调节板(7)不与所述弹性臂(32)接触。
  14. 一种电子设备，其特征在于，包括如权利要求1至13任一项所述的骨传导发声装置。
PCT/CN2023/099049 2022-07-28 2023-06-08 一种骨传导发声装置及电子设备 WO2024021898A1 (zh)

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