WO2020098113A1 - 发声装置和电子设备 - Google Patents

发声装置和电子设备 Download PDF

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Publication number
WO2020098113A1
WO2020098113A1 PCT/CN2018/125212 CN2018125212W WO2020098113A1 WO 2020098113 A1 WO2020098113 A1 WO 2020098113A1 CN 2018125212 W CN2018125212 W CN 2018125212W WO 2020098113 A1 WO2020098113 A1 WO 2020098113A1
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WIPO (PCT)
Prior art keywords
front cover
housing
groove
sound
vibration
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PCT/CN2018/125212
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English (en)
French (fr)
Inventor
李军
李栋
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歌尔股份有限公司
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Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020098113A1 publication Critical patent/WO2020098113A1/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Definitions

  • the invention relates to the technical field of sound energy conversion, in particular to a sound emitting device and electronic equipment.
  • the front cover and the diaphragm in the sound-generating device are bonded and fixed by an adhesive.
  • an adhesive In order to ensure the stable bonding of the front cover and the diaphragm, a large amount of adhesive is applied on the front cover. However, if there is a lot of adhesive, the front cover and the case are likely to be glued during the pressing process. The glue overflowing from the inside of the pressing surface of the front cover and the case will drip to the fold of the diaphragm, and Part of the diaphragm fold ring is stuck, which affects the vibration performance of the diaphragm, resulting in the generation of noise.
  • the main purpose of the present invention is to propose a sound-generating device, which is intended to avoid the viscous performance of the vibrating membrane from being influenced by viscous adhesive bonding the folded portion of the vibrating membrane.
  • the sound generating device proposed by the present invention includes:
  • the housing has an open installation cavity
  • the front cover is integrally stamped and formed of metal material and covers the opening of the installation cavity.
  • the edge of the front cover facing the housing is provided with an accommodating groove.
  • the accommodating groove is along the The circumferential extension of the front cover is arranged annularly; and,
  • a vibration system is housed in the installation cavity.
  • the vibration system includes a diaphragm including a central portion, a folded ring portion disposed around the central portion, and a fixed portion disposed around the folded ring portion.
  • the fixing portion is sandwiched between the edge portion of the front cover and the housing, and the fixing portion and the edge portion of the front cover are adhered by an adhesive.
  • the folding ring portion and the fixing portion The connection is provided corresponding to the accommodating groove.
  • an edge portion of the front cover has a first surface and a second surface facing the housing, the first surface is disposed around the second surface, and faces the housing relative to the second surface The direction is protrudingly provided, the first surface and the fixing portion are adhesively fixed, and the accommodating groove is provided at the connection between the first surface and the second surface.
  • the folded ring portion is bent away from the front cover, and the second surface is provided corresponding to the folded ring portion.
  • the accommodating groove has a first groove wall and a second groove wall disposed oppositely, the first groove wall is disposed near an outer periphery of the front cover, and the housing has a support that contacts the fixing portion Surface, the first groove wall is flush with the inner side of the support surface.
  • the groove width of the containing groove gradually increases.
  • a vibration groove is provided on the surface of the central area of the front cover facing the vibration system, and the vibration groove is directly opposite to the central portion of the diaphragm.
  • the central area of the front cover is recessed away from the vibration system to form the vibration groove on the surface of the front cover facing the housing and away from the front cover
  • a convex portion protruding from the edge portion is correspondingly formed on the surface of the housing.
  • the invention also provides an electronic device, which includes a housing and a sound-generating device.
  • the housing has a receiving cavity and a sound output channel communicating with the receiving cavity.
  • the sound-generating device is provided in the receiving cavity, and the The vibration system of the sound emitting device is disposed toward the sound output channel, and the sound generating device includes:
  • the housing has an open installation cavity
  • the front cover is integrally stamped and formed of metal material and covers the opening of the installation cavity.
  • the edge of the front cover facing the housing is provided with an accommodating groove.
  • the accommodating groove is along the The circumferential extension of the front cover is arranged annularly;
  • a vibration system is housed in the installation cavity.
  • the vibration system includes a diaphragm including a central portion, a folded ring portion disposed around the central portion, and a fixed portion disposed around the folded ring portion.
  • the fixing portion is sandwiched between the edge portion of the front cover and the housing, and the fixing portion and the edge portion of the front cover are adhered by an adhesive.
  • the folding ring portion and the fixing portion The connection is provided corresponding to the accommodating groove.
  • a fixed step surrounding the sound output channel is provided on the inner surface of the housing, and an edge portion of the front cover of the sound emitting device abuts on the fixed step;
  • a vibration groove is provided on the surface of the center area of the front cover facing the vibration system, the vibration groove is provided directly at the center of the diaphragm, and the center area of the front cover faces away from the surface of the housing Forming a convex portion protruding from the edge portion;
  • the orthographic projection of the convex portion is located in the sound output channel.
  • an elastic seal is provided between the edge of the front cover and the fixed step.
  • the front cover and the housing are pressed together
  • the overflowed glue will naturally flow into the accommodating groove, which can prevent the glue from flowing to the connection between the folding part and the fixing part and bonding the connection to the front cover, so it can Ensure the free vibration of the diaphragm to avoid the generation of noise.
  • FIG. 1 is an exploded schematic view of an embodiment of the sound-generating device of the present invention
  • FIG. 2 is a schematic cross-sectional view of the sounding device in FIG. 1;
  • FIG. 3 is a schematic structural view of the front cover in FIG. 2;
  • FIG. 4 is a schematic cross-sectional view of the front cover in FIG. 3;
  • FIG. 5 is a schematic cross-sectional view of a sounding device in an example
  • FIG. 6 is a schematic structural view of the front cover in FIG. 5;
  • FIG. 7 is a schematic structural diagram of the sounding device in FIG. 5;
  • FIG. 8 is a schematic cross-sectional view of an electronic device in an example
  • FIG. 9 is a schematic structural view of the sound emitting device of the present invention.
  • FIG. 10 is a schematic cross-sectional view of the electronic device of the present invention.
  • Label name Label name 10 case 231 Accommodating slot 11 Output channel 231a First groove wall 12 Fixed step 231b Second groove wall 20 Sounding device 232 First surface
  • the directional indicator is only used to explain a specific posture (as shown in the drawings) The relative positional relationship, movements, etc. of the components below, if the specific posture changes, then the directional indication changes accordingly.
  • first”, “second”, etc. are for descriptive purposes only, and cannot be understood as instructions or hints Its relative importance or implicitly indicates the number of technical features indicated.
  • the features defined with “first” and “second” may include at least one of the features either explicitly or implicitly.
  • the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the protection scope claimed by the present invention.
  • the invention provides an electronic device, which can be a device capable of sounding, such as a headset, a mobile phone, a computer, and the like.
  • the electronic device includes a housing 10 and a sound emitting device 20.
  • the housing 10 has a receiving cavity and a sound output channel 11 communicating with the receiving cavity.
  • the sound emitting device 20 is received in the receiving cavity and the sound device vibrates
  • the system is set toward the sound output channel 11 to be able to emit sound toward the sound output channel 11.
  • the sound-emitting device 20 includes a housing 21, a vibration system, a magnetic circuit system, and a front cover 23.
  • the housing 21 has a mounting cavity, and the mounting cavity has an opening.
  • the front cover 23 covers the housing 21 The opening is provided, and the vibration system and the magnetic circuit system are provided in the installation cavity, and the front cover 23 is provided with an opening at a position corresponding to the vibration system, so that the sound generated by the vibration system comes out of the opening of the front cover 23.
  • the vibration system includes a diaphragm 22 that includes a central portion 221, a folded ring portion 222 disposed around the central portion 221, and a fixed portion 223 disposed around the folded ring portion 222.
  • the folded ring portion 222 is formed by bending into the housing 21, That is, the folding ring portion 222 is bent in a direction away from the front cover 23 and can vibrate up and down.
  • the front cover 23 includes a central area and an edge portion 236, the edge portion 236 is disposed around the central area, the fixing portion 223 is sandwiched between the edge portion 236 of the front cover 23 and the housing 21, and the fixing portion 223 and the front cover 23 The edge portion 236 is bonded by an adhesive.
  • the surface of the front cover 23 facing the housing 21 is provided with an accommodating groove 231.
  • the accommodating groove 231 is provided on the edge portion 236 and is provided in a ring shape along the circumferential direction of the front cover 23.
  • the connecting portion of the folding ring portion 222 and the fixing portion 223 is provided corresponding to the accommodating groove 231, that is, the orthographic projection of the connecting portion of the folding ring portion 222 and the fixing portion 223 on the front cover 23 falls into the accommodating groove 231, and the The placement groove 231 is provided around the connection between the folded ring portion 222 and the fixed portion 223 to cover the entire circle of the connection between the folded ring portion 222 and the fixed portion 223.
  • the surface of the edge portion 236 of the front cover 23 facing the housing 21 is provided with a ring-shaped accommodating groove 231, and the accommodating groove 231 is provided corresponding to the connection between the folding portion 222 and the fixing portion 223 of the diaphragm 22
  • the overflowed glue will naturally flow into the accommodating groove 231, which can prevent the glue from flowing to the junction of the folding portion 222 and the fixing portion 223. Since the connection point is adhered to the front cover 23, the free vibration of the diaphragm 22 can be ensured, and the generation of noise can be avoided.
  • the edge portion 236 of the front cover 23 has a first surface 232 and a second surface 233 facing the housing 21.
  • the first surface 232 is disposed around the second surface 233 and faces the housing 21 relative to the second surface 233
  • the direction is protruding, and the first surface 232 and the fixing portion 223 are adhesively fixed, the second surface 233 is disposed corresponding to the folding ring portion 222, and a receiving groove 231 is provided at the connection between the first surface 232 and the second surface 233.
  • a stepped portion is provided on the surface of the edge portion 236 of the front cover 23 facing the housing 21, and the stepped portion extends in a ring shape along the circumferential direction of the front cover 23, so that the surface of the front cover 23 facing the housing 21 Two surfaces that are staggered in height are formed, that is, a first surface 232 and a second surface 233 are formed.
  • the first surface 232 is coated with an adhesive and fixed to the fixing portion 223 of the diaphragm 22, and the second surface 233 is provided corresponding to the folded ring portion 222 of the diaphragm 22 so that the front cover 23 and the folded ring portion 222 are spaced apart When opened, the front cover 23 is prevented from contacting the folding ring portion 222 and the connection between the folding ring portion 222 and the fixing portion 223 to affect the vibration of the folding ring portion 222.
  • the overflowing glue can pass from the first surface 232 and follow the first surface 232 and the second surface
  • the connecting surface of 233 flows onto the second surface 233. Since the second surface 233 is disposed away from the diaphragm 22 relative to the first surface 232, that is, there is a gap between the second surface 233 and the diaphragm 22, the glue can be reduced Contact with the diaphragm 22.
  • the height difference between the first surface 232 and the second surface 233 is small, it means that the second surface 233 is closer to the junction of the folding ring portion 222 and the fixing portion 223, and there is a lot of glue spilling on the front cover 23
  • thicker glue will accumulate at the connection between the first surface 232 and the second surface 233, and then contact the connection between the folded ring portion 222 and the fixed portion 223, which affects the normal vibration of the diaphragm 22.
  • the height difference between the first surface 232 and the second surface 233 is increased, although the distance between the second surface 233 and the junction of the folded ring portion 222 and the fixed portion 223 can be increased, the thickness of the front cover 23 is generally thin.
  • the thickness A of the front cover 23 at the position corresponding to the second surface 233 is too thin, and because the area of the second surface 233 is large, it is equivalent to making the front cover 233
  • the thickness in the larger range of 23 is relatively thin.
  • the accommodating groove 231 is only provided corresponding to the connection between the folding ring portion 222 and the fixing portion 223, which is equivalent to
  • the accommodating groove 231 occupies less space on the front cover 23, so the thickness of the front cover 23 in a larger area can be avoided, so the influence on the overall thickness of the front cover 23 can be greatly reduced, and the front cover can be reduced Because of the influence of the ability to withstand external pressure, the above-mentioned series of problems that occur when increasing or decreasing the height difference between the first surface 232 and the second surface 233 can be avoided.
  • the accommodating groove 231 has a first groove wall 231a and a second groove wall 231b that are oppositely arranged.
  • the first groove wall 231a is disposed near the outer periphery of the front cover 23, and the housing 21 has a supporting surface that contacts the fixing portion 223.
  • the first groove wall 231a is flush with the inside of the support surface.
  • the accommodating groove 231a is flush with the inner side of the support surface, it is equivalent to that the accommodating groove 231 is disposed staggered from the support surface, so that the fixing portion 223 is pressed against the entire support surface by the first surface 232 Since the entire supporting surface is resisted by the first surface 232, the area where the fixing portion 223 is clamped can be increased, so that the fixing effect of the fixing portion 223 on the front cover 23 and the housing is better.
  • the first groove wall 231a is located between the inner and outer sides of the support surface, that is, the first groove wall 231a is shifted outward with respect to the inner side of the support surface, the position of the corresponding receiving groove 231 of the support surface is not different from that of the front cover If the 23 is in contact, the diaphragm 22 is not subject to the pressure of the front cover 23 at this position, so the force area of the diaphragm 22 will be reduced, and the accommodation will cause the diaphragm 22 to loosen. Therefore, in this embodiment, arranging the first groove wall 231a flush with the inner side of the support surface can avoid the occurrence of such problems.
  • the groove width of the accommodating groove 231 gradually increases in a direction close to the opening of the accommodating groove 231.
  • the accommodating groove 231 has a first groove wall 231a and a second groove wall 231b that are oppositely arranged.
  • the first groove wall 231a is disposed near the outer periphery of the front cover 23, and in the direction close to the notch of the accommodating groove 231, the first A groove wall 231a is gradually inclined outwardly, so that the glue flows obliquely along the first groove wall 231a and guides the flow of the glue.
  • first groove wall 231a is flush with the inside of the support surface
  • the end of the first groove wall 231a near the notch is flush with the inside of the support surface.
  • the second groove wall 231b may also be inclined, so that the groove of the receiving groove 231 forms a flared shape.
  • the notch of the accommodating groove 231 it is also advantageous for the mold to be ejected.
  • a vibration groove 234 is formed in the central area of the front cover 23 and is recessed away from the vibration system, that is, a vibration groove 234 is provided on the surface of the front cover 23 facing the vibration system, and the vibration groove 234 is directly opposite The central portion 221 of the diaphragm 22 is provided.
  • the vibration groove 234 is formed by an integral recess of the front cover 23.
  • the central area of the front cover 23 is recessed away from the diaphragm 22 to form a vibration groove 234 on the surface of the front cover 23 facing the housing 21, and a corresponding protrusion is formed on the surface of the front cover 23 facing away from the housing
  • the convex portion 235 protrudes in a direction away from the diaphragm 22, and the convex portion 235 protrudes from the edge portion 236.
  • the vibration groove 234 is formed, the groove depth of the vibration groove 234 is not affected by the thickness of the front cover 23, and the groove depth of the vibration groove 234 can be set to be larger, thereby ensuring the front cover 23 and the diaphragm 22 The distance between the central parts 221 is large.
  • the vibration groove 234 may also be formed by removing part of the surface material from the front cover 23.
  • the front cover 23 is a metal piece, and is stamped and formed integrally.
  • the material of the front cover 23 may be other easily stretchable materials such as brass or iron, so as to facilitate the molding of the front cover 23.
  • the front cover 23 is a metal member, which is beneficial to improve the adhesion stability of the front cover 23 and the front cover 23.
  • the inner surface of the housing 10 is provided with a fixed step 12 on the cavity wall of the receiving cavity.
  • the fixed step 12 is disposed around the sound output channel 11 and the fixed step 12 abuts the edge of the front cover 23 of the sound emitting device 20 Part 236, thereby restricting the movement of the sound emitting device 20 into the sound output channel 11.
  • the fixed step 12 extends in a ring shape along the circumferential direction of the front cover 23, the fixed step 12 is surrounded on the periphery of the convex portion 235, and the orthographic projection of the convex portion 235 is located in the sound output channel 11 , To ensure that the protrusion 235 can extend into the sound output channel 11.
  • the fixed step 12 is provided in a ring shape to ensure that the fixed step 12 abuts and fixes with the entire peripheral edge of the front cover 23 to achieve a better sealing effect.
  • the front cover 23 and the fixing step 12 are adhered and fixed.
  • an elastic seal 24 may also be provided between the front cover 23 and the fixed step 12, the elastic seal 24
  • the ring shape may be foam, silicone, or the like.
  • the two oppositely disposed surfaces of the elastic seal 24 are provided with an adhesive to achieve the adhesion and fixation between the front cover 23 and the fixed step 12.
  • the front cover 23 and the fixed step 12 can also be fixed by a snap structure or screws.
  • the convex portion 235 is formed on the front cover 23
  • the edge portion 236 is a flat area that is close to the front cover 23
  • the edge of the and surrounds the convex portion 235, so it is equivalent to the front cover 23 is in contact with the fixed step 12 through the flat area, so that the plane-to-plane contact can be achieved, thereby facilitating the improvement of the sealing effect between the two.
  • the convex portion 235 extends into the sound output channel 11 and is convex
  • the raised portion 235 makes full use of the space in the sound output channel 11, and the accommodating cavity formed in the housing 10 only needs to be capable of accommodating the sound emitting device 20 except for the convex portion 235 without considering the convex portion 235 Height, that is to say, while ensuring sufficient vibration space between the diaphragm 22 and the front cover 23, the space of the storage cavity can be reduced, and there is no need to additionally enlarge the housing 10 of the electronic device to accommodate the sound emitting device 20, and There is no need to modify the housing 10 or other components of the electronic device, so that the increase in volume and cost of the electronic device can be avoided.
  • the front cover 23 'in the example is a flat plate, the distance between the front cover 23' and the diaphragm 22 is large, and the entire front cover 23 'is If it is placed in the receiving cavity, it means that the receiving cavity needs to have a large height to be able to accommodate the sound-generating device 20. Therefore, the size of the housing must be designed to be large, that is, the whole machine The greater the height, the larger the overall volume.
  • the front cover 23 is provided with a vibration groove 234 and a convex portion 235, which can avoid the above problems, so that the sound generating device 20 can make full use of the space of the whole machine and reduce the volume of the whole machine. Optimized acoustic performance.
  • the sound-emitting device 20 of the present invention can improve the space utilization of the whole machine.
  • the diaphragm 22 has the same vibration space, that is, the distance between the central portion 221 of the diaphragm 22 and the central area of the front cover 23 is the same
  • the sound-generating devices of the two have the same thickness B.
  • the thickness B C + D of the sound-generating device 20 in the embodiment of the present invention, where C refers to the protrusion height of the protrusion 235.
  • the elastic seal 24 in the electronic device in the example and the elastic seal 24 in the embodiment of the present invention have the same thickness, and the thickness of the elastic seal 24 is C, that is, the thickness of the elastic seal 24 is equal to the protrusion The raised height of 235.
  • the front cover 23 is in contact with the fixed step 12 through the elastic seal 24.
  • the front cover 23 is a flat plate body, that is, equivalent to the elastic seal 24 protrudingly disposed on the front cover 23, at this time, the height of the sound generating device 20 is equivalent to the height of the sound generating device 20 itself plus the thickness of the sealing member 24, That is B + C, which is equivalent to the elastic seal 24 squeezing the sound-emitting device 20 backward, so that the distance E between the sound-emitting device 20 and the back b of the mobile phone is short, that is, the space between the sound-emitting device and the back b of the mobile phone is small, which reduces The accommodating space between other components in the sound-emitting device 20 and the back b of the mobile phone is not conducive to the installation of other components.
  • a refers to the screen surface of the mobile
  • the edge portion 236 of the front cover 23 is in contact with the fixed step 12 through the elastic seal 24, because the front cover 23 is formed by forming the vibration groove 234 and the convex portion In the form of 235 to increase the vibration space of the diaphragm 22, and the elastic seal 24 is arranged to avoid the protrusion 235, after the elastic seal 24 is provided, the elastic seal 24 is flush with the protrusion 235, that is, the elastic seal
  • the setting of the piece 24 does not change the height of the sounding device 20, and the elastic seal 24 does not cause the sounding device 20 to move backward and squeeze the space between the sounding device 20 and the back of the mobile phone.
  • F, F E + C. Obviously, F is greater than E. Therefore, after adopting the sound emitting device 20 in the embodiment of the present invention, the space of the whole machine can be greatly saved, and the space utilization rate of the whole machine can be improved.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

一种发声装置和电子设备，发声装置包括：外壳（21），具有一敞口的安装腔；前盖（23），盖合所述安装腔的敞口设置，所述前盖（23）的朝向所述外壳（21）的表面设有容置槽（231），所述容置槽（231）沿所述前盖（23）的周向延伸呈环状设置；以及，振动系统，收容于所述安装腔，所述振动系统包括振膜（22），所述振膜（22）包括中心部（221）、围绕所述中心部（221）设置的折环部（222）以及围绕所述折环部（222）设置的固定部（223），所述固定部（223）夹持于所述前盖（23）和所述外壳（21）之间，且所述固定部（223）与所述前盖（23）通过粘接剂粘接，所述折环部（222）和所述固定部（223）的连接处对应所述容置槽（231）设置。该技术方案能够避免粘粘接剂粘接振膜（22）的折环部（222）而影响振膜的振动性能。

Description

发声装置和电子设备 技术领域
本发明涉及声能转换技术领域，特别涉及一种发声装置和电子设备。
背景技术
通常，发声装置内的前盖和振膜是通过粘接剂进行粘接固定的，为了保证前盖和振膜稳固粘接，故在前盖上会涂设较多的粘接剂。然而若粘接剂较多，在前盖和外壳压合的过程中，容易产生溢胶现象，从前盖和外壳压合面的内侧所溢出的胶水会滴落到振膜的折环部，并将振膜折环部部分粘住，从而影响振膜的振动性能，导致杂音的产生。
发明内容
本发明的主要目的是提出一种发声装置，旨在避免粘粘接剂粘接振膜的折环部而影响振膜的振动性能。
为实现上述目的，本发明提出的发声装置，包括：
外壳，具有一敞口的安装腔；
前盖，由金属材料一体冲压成型，并盖合所述安装腔的敞口设置，所述前盖的边缘部的朝向所述外壳的表面设有容置槽，所述容置槽沿所述前盖的周向延伸呈环状设置；以及，
振动系统，收容于所述安装腔，所述振动系统包括振膜，所述振膜包括中心部、围绕所述中心部设置的折环部以及围绕所述折环部设置的固定部，所述固定部夹持于所述前盖的边缘部和所述外壳之间，且所述固定部与所述前盖的边缘部通过粘接剂粘接，所述折环部和所述固定部的连接处对应所述容置槽设置。
可选地，所述前盖的边缘部具有面向所述外壳的第一表面和第二表面，所述第一表面环绕所述第二表面设置，并相对所述第二表面朝所述外壳所在的方向凸出设置，所述第一表面与所述固定部粘接固定，所述第一表面和所 述第二表面的连接处设有所述容置槽。
可选地，所述折环部向远离所述前盖的方向弯折，所述第二表面对应所述折环部设置。
可选地，所述容置槽具有相对设置的第一槽壁和第二槽壁，所述第一槽壁靠近所述前盖的外周设置，所述外壳具有与所述固定部接触的支撑面，所述第一槽壁与所述支撑面的内侧平齐。
可选地，在靠近所述容置槽槽口的方向上，所述容置槽的槽宽逐渐增大。
可选地，所述前盖的中央区域朝向所述振动系统的表面设有振动凹槽，所述振动凹槽正对所述振膜的中心部设置。
可选地，所述前盖的中央区域朝远离所述振动系统的方向凹陷，以在所述前盖的朝向所述外壳的表面形成所述振动凹槽，并在所述前盖的背离所述外壳的表面对应形成凸出于所述边缘部的凸起部。
本发明还提出一种电子设备，包括壳体以及发声装置，所述壳体具有一收容腔以及与所述收容腔连通的出音通道，所述发声装置设于所述收容腔内，且所述发声装置的振动系统朝向所述出音通道设置，所述发声装置包括：
外壳，具有一敞口的安装腔；
前盖，由金属材料一体冲压成型，并盖合所述安装腔的敞口设置，所述前盖的边缘部的朝向所述外壳的表面设有容置槽，所述容置槽沿所述前盖的周向延伸呈环状设置；以及
振动系统，收容于所述安装腔，所述振动系统包括振膜，所述振膜包括中心部、围绕所述中心部设置的折环部以及围绕所述折环部设置的固定部，所述固定部夹持于所述前盖的边缘部和所述外壳之间，且所述固定部与所述前盖的边缘部通过粘接剂粘接，所述折环部和所述固定部的连接处对应所述容置槽设置。
可选地，所述壳体的内表面设有环绕所述出音通道的固定台阶，所述发声装置的前盖的边缘部抵接在所述固定台阶上；
所述前盖的中央区域朝向所述振动系统的表面设有振动凹槽，所述振动凹槽正对所述振膜的中心部设置，且所述前盖的中央区域背离所述外壳的表面形成凸出于所述边缘部的凸起部；
所述凸起部的正投影位于所述出音通道中。
可选地，所述前盖的边缘部与所述固定台阶之间设有弹性密封件。
本发明中，由于在前盖边缘部的朝向外壳的表面设有环状的容置槽，且容置槽对应振膜的折环部和固定部的连接处所设置，当前盖和外壳压合的过程中出现胶水内溢的现象时，溢出的胶水会自然流淌至容置槽内，可避免胶水流到折环部和固定部的连接处而将该连接处粘接在前盖上，因此能够保证振膜的自由振动，避免杂音的产生。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明发声装置一实施例的分解示意图；
图2为图1中发声装置的剖切示意图；
图3为图2中前盖的结构示意图；
图4为图3中前盖的剖切示意图；
图5为一范例中发声装置的剖切示意图；
图6为图5中前盖的结构示意图；
图7为图5中发声装置的结构示意图；
图8为一范例中电子设备的剖切示意图；
图9为本发明发声装置的结构示意图；
图10为本发明电子设备的剖切示意图。
附图标号说明：
标号 名称 标号 名称
10 壳体 231 容置槽
11 出音通道 231a 第一槽壁
12 固定台阶 231b 第二槽壁
20 发声装置 232 第一表面
21 外壳 233 第二表面
22 振膜 234 振动凹槽
221 中心部 235 凸起部
222 折环部 236 边缘部
223 固定部 24 弹性密封件
23/23＇ 前盖    
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
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的一部分实施例，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作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种电子设备，该电子设备可为耳机、手机、电脑等能够发声的设备。请参考图10，电子设备包括壳体10和发声装置20，壳体10具有一收容腔以及与收容腔连通的出音通道11，发声装置20收容于所述收容腔内， 且发声装置的振动系统朝向出音通道11设置，以能够朝出音通道11发声。
请结合参考图1至图4，发声装置20包括外壳21、振动系统、磁路系统和前盖23，外壳21具有一安装腔，安装腔具有一敞口，前盖23则盖合外壳21的敞口设置，振动系统以及磁路系统设置在安装腔内，且前盖23上在对应振动系统的位置设有开口，以便于振动系统产生的声音从前盖23的开口中出来。振动系统包括振膜22，振膜22包括中心部221、围绕中心部221设置的折环部222以及围绕折环部222设置的固定部223，折环部222朝外壳21内弯折所形成，即折环部222朝远离前盖23的方向弯折，并能够上下振动。另外，前盖23包括一中央区域以及边缘部236，边缘部236环绕中央区域设置，固定部223夹持于前盖23的边缘部236和外壳21之间，且固定部223与前盖23的边缘部236通过粘接剂粘接。
本实施例中，前盖23的朝向外壳21的表面设有容置槽231，容置槽231设置在边缘部236上，并沿前盖23的周向延伸呈环状设置。折环部222和固定部223的连接处对应容置槽231设置，即折环部222和固定部223的连接处在前盖23上的正投影是落入容置槽231内的，且容置槽231环绕折环部222和固定部223的连接处设置，以将折环部222和固定部223的整圈连接处均罩设在内。
本发明中，由于在前盖23边缘部236的朝向外壳21的表面设有环状的容置槽231，且容置槽231对应振膜22的折环部222和固定部223的连接处所设置，当前盖23和外壳21压合的过程中出现胶水内溢的现象时，溢出的胶水会自然流淌至容置槽231内，可避免胶水流到折环部222和固定部223的连接处而将该连接处粘接在前盖23上，因此能够保证振膜22的自由振动，避免杂音的产生。
本实施例中，前盖23的边缘部236具有面向外壳21的第一表面232和第二表面233，第一表面232环绕在第二表面233外设置，并相对第二表面233朝外壳21所在的方向凸出设置，且第一表面232与固定部223粘接固定，第二表面233对应折环部222设置，第一表面232和第二表面233的连接处设有容置槽231。具体而言，前盖23边缘部236的朝向外壳21的表面上设有台阶部，且台阶部沿前盖23的周向延伸而呈环状设置，从而使得前盖23的朝向外壳21的表面形成高低错开的两个表面，即形成第一表面232和第二表 面233。第一表面232上涂设有粘接剂而与振膜22的固定部223粘接固定，第二表面233对应振膜22的折环部222设置，以使前盖23和折环部222间隔开来，避免前盖23接触折环部222以及折环部222和固定部223的连接处而影响到折环部222的振动。
当前盖23上未设置容置槽231时，若设置高低错开的第一表面232和第二表面233，则内溢的胶水可从第一表面232，并顺着第一表面232和第二表面233的连接面流淌到第二表面233上，由于第二表面233相对第一表面232而言是远离振膜22设置的，即第二表面233和振膜22之间具有间隙，故可减少胶水与振膜22的接触。但是，若第一表面232和第二表面233的高度差较小，即意味着第二表面233距离折环部222和固定部223的连接处较近，在前盖23溢胶较多的情况下，较厚的胶水会堆积在第一表面232和第二表面233的连接处，进而与折环部222和固定部223的连接处接触，影响到振膜22的正常振动。若增大第一表面232和第二表面233的高度差，虽然能够增大第二表面233与折环部222和固定部223的连接处的距离，但是由于前盖23的厚度一般较薄，在去除部分表面材料所形成第二表面233后，将导致前盖23在对应第二表面233的位置处的厚度A过薄，且由于第二表面233的面积较大，则相当于使得前盖23的较大范围内的厚度均较薄，在进行整机装配时，由于前盖23需要承受较大的力，前盖23过薄容易导致前盖23形变，进而影响性能，造成杂音。
为解决上述问题，本发明中，通过在第一表面232和第二表面233的连接处设置容置槽231，容置槽231仅对应折环部222和固定部223的连接处设置，相当于容置槽231在前盖23上的占用空间较小，故能够避免前盖23较大区域内厚度的减薄，因此能够大大减小对前盖23整体厚度的影响，并减小对前盖23承受外界压力的能力的影响，故能够避免上述在增大或减小第一表面232和第二表面233的高度差时所产生的一系列问题。
本实施例中，容置槽231具有相对设置的第一槽壁231a和第二槽壁231b，第一槽壁231a靠近前盖23的外周设置，外壳21具有与固定部223接触的支撑面，第一槽壁231a与支撑面的内侧平齐。本实施例中，由于第一槽壁231a与支撑面的内侧平齐，相当于容置槽231是错开支撑面设置的，如此固定部223是被第一表面232抵压在整个支撑面上的，整个支撑面均受到第一表面 232的抵压力，因此可增大固定部223被夹持的面积，使得固定部223在前盖23和外壳上的固定效果更好。若第一槽壁231a位于支撑面的内外侧之间，即第一槽壁231a相对于支撑面的内侧而言朝外偏移，则支撑面的对应容置槽231的位置是不与前盖23接触的，振膜22在这个位置不受到前盖23的抵压力，因此会减小振膜22的受力面积，容置导致振膜22松脱。故本实施例中，将第一槽壁231a与支撑面的内侧平齐设置能够避免该类问题的产生。
为利于胶水流入容置槽231内，本实施例中，在靠近容置槽231槽口的方向上，容置槽231的槽宽逐渐增大。可选地，容置槽231具有相对设置的第一槽壁231a和第二槽壁231b，第一槽壁231a靠近前盖23的外周设置，在靠近容置槽231槽口的方向上，第一槽壁231a逐渐朝外倾斜设置，如此利于胶水顺着第一槽壁231a倾斜流动，对胶水的流动起到导向作用。可以想到的是，在第一槽壁231a与支撑面的内侧平齐的实施例中，第一槽壁231a的靠近槽口的一端与支撑面的内侧平齐。在其它实施例中，也可以是第二槽壁231b倾斜设置，以使得容置槽231的槽口形成扩口形状。另外，通过将容置槽231的槽口设置得较大也利于模具出模。
本实施例中，前盖23的中央区域且朝远离振动系统的方向凹陷形成有振动凹槽234，即在前盖23的面向振动系统的表面设有振动凹槽234，振动凹槽234正对振膜22的中心部221设置。通过在前盖23上且正对振膜22的中心部221的位置设置振动凹槽234，相当于增大了前盖23与振膜22的中心部221之间的距离，使得振膜22的振动的空间变大，如此能够避免振膜22与前盖23接触而阻碍振膜22振动，保证了振膜22振动的自由性，提高了发声装置20的声学性能。同时，由于是通过在前盖23上设置振动凹槽234的形式来增大振膜22的振动空间，而不是将前盖23与振膜22的中心部221两者之间的整体距离增大，即不是将前盖23朝远离振膜22的位置移动，因而使得前盖23与振膜22两者之间更加紧凑，能够减小发声装置20的整体高度。
可选地，振动凹槽234由前盖23一体凹陷所形成。具体而言，前盖23的中央区域朝远离振膜22的方向凹陷，以在前盖23的朝向外壳21的表面形成振动凹槽234，并在前盖23的背离外壳的表面对应形成凸起部235，凸起部235朝远离振膜22的方向凸出，且凸起部235凸出于边缘部236设置。采 用该方式来形成振动凹槽234的方式，振动凹槽234的槽深不受前盖23厚度的影响，振动凹槽234的槽深可设置得较大，进而保证前盖23与振膜22的中心部221之间的距离较大。当然，在其它实施例中，振动凹槽234也可由前盖23去除部分表面材料的形式所形成。
可选地，前盖23为金属件，并一体冲压成型。具体地，前盖23的材质可为黄铜或是铁等其它易拉伸成型的材质，以利于前盖23成型。此外，前盖23为金属件有利于提高前盖23与前盖23的粘接稳定性。
请再次结合参考图10，壳体10的内表面即在收容腔的腔壁设有一固定台阶12，固定台阶12环绕出音通道11设置，固定台阶12抵接发声装置20的前盖23的边缘部236，从而限制发声装置20朝出音通道11内移动。
可选地，固定台阶12沿前盖23的周向延伸而呈环状设置，固定台阶12是围设在凸起部235的外围的，且凸起部235的正投影位于出音通道11中，即可保证凸起部235能够伸入到出音通道11内。另外，固定台阶12呈环状设置能够保证固定台阶12与前盖23的整个周缘抵接固定，实现更好的密封效果。
可选地，前盖23与固定台阶12之间粘接固定。为避免水汽等物质从发声装置20与固定台阶12之间的缝隙进入到收容腔内，可选地，在前盖23与固定台阶12之间还可设置弹性密封件24，弹性密封件24呈环状，具体可为泡棉、硅胶等等，弹性密封件24的两相对设置的表面上均设有粘接剂，以实现前盖23与固定台阶12之间的粘接固定。另外，前盖23与固定台阶12之间也可通过卡扣结构或是螺钉等进行固定。
在前盖23上形成有凸起部235的实施例中，可以想到的是，前盖23的未设置凸起部235的位置即边缘部236为一平坦区域，该平坦区域是靠近前盖23的边缘并环绕凸起部235设置的，故相当于前盖23是通过该平坦区域与固定台阶12抵接的，如此能够实现平面与平面的接触，从而便于提高两者之间的密封效果。另外，由于该平坦区域与固定台阶12抵接，而凸起部235相对于平坦区域是朝出音通道11内凸出的，故凸起部235是伸入出音通道11内设置的，凸起部235充分利用了出音通道11内的空间，在壳体10上所形成的收容腔只要能够收容发声装置20的除凸起部235以外的部分即可，而不需要考虑凸起部235的高度，也就是说在保证振膜22和前盖23之间具有足 够的振动空间的同时，能够减小收容腔的空间，不需要额外扩大电子设备的壳体10来收容发声装置20，且也不需要对电子设备的壳体10或是其它部件进行更改，因而能够避免电子设备体积的增大和成本的增加。请结合参考图5至图10，范例中的前盖23＇由于是一整块平直的板体，前盖23＇与振膜22之间的距离较大，而整个前盖23＇是容置在收容腔内的，即相当于收容腔需要具有一个较大的高度，才能够满足发声装置20容纳在内，故必然需要将壳体的尺寸设计得较大才可，即使得整机的高度较大，整体体积变大。而本发明中将前盖23设置振动凹槽234和凸起部235的形式，能够避免上述问题的产生，使得发声装置20在充分地利用整机空间，减小整机体积的同时，更好地优化了声学性能。
以下通过具体案例来进行说明采用本发明的发声装置20能够提升整机空间利用率。假设在一范例中发声装置20和本发明实施例中的发声装置20中，其振膜22具有相同的振动空间，即振膜22的中心部221与前盖23的中央区域之间的距离相同的前提下，两者的发声装置具有相同的厚度B，本发明实施例中的发声装置20的厚度B＝C+D，其中C指的是凸起部235的凸起高度。另外，假设范例中电子设备中的弹性密封件24和本发明实施例中的弹性密封件24具有相同的厚度，且弹性密封件24的厚度为C，即弹性密封件24的厚度等于凸起部235的凸起高度。
具体而言，对于手机而言，请结合参考图7和图8，采用范例中的发声装置20进行整机装配时，前盖23通过弹性密封件24与固定台阶12抵接，由于范例中的前盖23为一块平直的板体，即相当于弹性密封件24凸出设置在前盖23上，此时发声装置20的高度相当于发声装置20本身的高度加上密封件24的厚度，即为B+C，相当于弹性密封件24将发声装置20朝后挤压，使得发声装置20与手机背面b的距离E较近，即发声装置和手机背面b的空间较小，减小了其它部件在发声装置20和手机背面b之间的容置空间，不利于其它部件的安装。图8中a指代的是手机屏幕面。
请结合参考图9和图10，而本发明实施例中，前盖23的边缘部236通过弹性密封件24与固定台阶12抵接，由于前盖23是通过形成振动凹槽234和凸起部235的形式来增大振膜22的振动空间的，且弹性密封件24避开凸起部235设置，在设置弹性密封件24后，弹性密封件24与凸起部235平齐， 即弹性密封件24的设置并不会改变发声装置20的高度，弹性密封件24并不会导致发声装置20后移而挤压发声装置20和手机背面的空间，此时发声装置20和手机背面的空间高度为F，F＝E+C，显然F是大于E的，故采用本发明实施例中的发声装置20后，能够大大节省整机空间，提升整机空间利用率。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种发声装置，其特征在于，包括：
    外壳，具有一敞口的安装腔；
    前盖，由金属材料一体冲压成型，并盖合所述安装腔的敞口设置，所述前盖的边缘部的朝向所述外壳的表面设有容置槽，所述容置槽沿所述前盖的周向延伸呈环状设置；以及
    振动系统，收容于所述安装腔，所述振动系统包括振膜，所述振膜包括中心部、围绕所述中心部设置的折环部以及围绕所述折环部设置的固定部，所述固定部夹持于所述前盖的边缘部和所述外壳之间，且所述固定部与所述前盖的边缘部通过粘接剂粘接，所述折环部和所述固定部的连接处对应所述容置槽设置。
  2. 如权利要求1所述的发声装置，其特征在于，所述前盖的边缘部具有面向所述外壳的第一表面和第二表面，所述第一表面环绕所述第二表面设置，并相对所述第二表面朝所述外壳所在的方向凸出设置，所述第一表面与所述固定部粘接固定，所述第一表面和所述第二表面的连接处设有所述容置槽。
  3. 如权利要求2所述的发声装置，其特征在于，所述折环部向远离所述前盖的方向弯折，所述第二表面对应所述折环部设置。
  4. 如权利要求1所述的发声装置，其特征在于，所述容置槽具有相对设置的第一槽壁和第二槽壁，所述第一槽壁靠近所述前盖的外周设置，所述外壳具有与所述固定部接触的支撑面，所述第一槽壁与所述支撑面的内侧平齐。
  5. 如权利要求1所述的发声装置，其特征在于，在靠近所述容置槽槽口的方向上，所述容置槽的槽宽逐渐增大。
  6. 如权利要求1至5任意一项所述的发声装置，其特征在于，所述前盖的中央区域朝向所述振动系统的表面设有振动凹槽，所述振动凹槽正对所述 振膜的中心部设置。
  7. 如权利要求6所述的发声装置，其特征在于，所述前盖的中央区域朝远离所述振动系统的方向凹陷，以在所述前盖的朝向所述外壳的表面形成所述振动凹槽，并在所述前盖的背离所述外壳的表面对应形成凸出于所述边缘部的凸起部。
  8. 一种电子设备，其特征在于，包括壳体以及如权利要求1-7任意一项所述的发声装置，所述壳体具有一收容腔以及与所述收容腔连通的出音通道，所述发声装置设于所述收容腔内，且所述发声装置的振动系统朝向所述出音通道设置。
  9. 如权利要求8所述的电子设备，其特征在于，所述壳体的内表面设有环绕所述出音通道的固定台阶，所述发声装置的前盖的边缘部抵接在所述固定台阶上；
    所述前盖的中央区域朝向所述振动系统的表面设有振动凹槽，所述振动凹槽正对所述振膜的中心部设置，且所述前盖的中央区域背离所述外壳的表面形成凸出于所述边缘部的凸起部；
    所述凸起部的正投影位于所述出音通道中。
  10. 如权利要求9所述的电子设备，其特征在于，所述前盖的边缘部与所述固定台阶之间设有弹性密封件。
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