WO2019137191A1 - 发声器 - Google Patents

发声器 Download PDF

Info

Publication number
WO2019137191A1
WO2019137191A1 PCT/CN2018/123194 CN2018123194W WO2019137191A1 WO 2019137191 A1 WO2019137191 A1 WO 2019137191A1 CN 2018123194 W CN2018123194 W CN 2018123194W WO 2019137191 A1 WO2019137191 A1 WO 2019137191A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
magnetic circuit
casing
lower cover
generator according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/123194
Other languages
English (en)
French (fr)
Inventor
赵国栋
郑泽东
李培俊
姬雅倩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
Original Assignee
Goertek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Priority to US16/961,463 priority Critical patent/US11395071B2/en
Publication of WO2019137191A1 publication Critical patent/WO2019137191A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

Definitions

  • the invention relates to the technical field of sounding devices.
  • Sounding devices are important components in electronic products that convert electrical signals into acoustic signals.
  • the development trend of electronic products is getting thinner and thinner, and in order to realize more functions, more and more components in electronic products are bound to make space for sounding devices smaller and smaller, and electronic products are paying more and more attention.
  • the user's music experience therefore requires the sound device to have better sound quality.
  • the sounding device of the prior art installs the sounder in a box having a volume
  • the sounder includes a housing and a magnetic circuit system and a vibration system housed in the housing, the sounder and the cabinet
  • the rear cavity is formed, and the larger the back cavity space, the lower the low frequency resonance frequency of the product, so the low frequency performance of the product is improved.
  • the prior art sounding device usually has two structures: one is a structure similar to a sound box, the box body is a rectangular parallelepiped type, and the sounder is fixed on the front plate of the box body to form a rear cavity in the thickness direction and the rear horizontal direction.
  • the box has a receiving cavity for accommodating the sounder and a rear cavity at the side of the sounder, and the rear cavity is formed on the side of the sounder to obtain as large as possible.
  • the volume of the rear cavity but at the same time, also leads to a large space occupied by the entire sounding device in the horizontal direction, which is disadvantageous for miniaturization of the product.
  • the shape of the rear cavity is irregular, the airflow entering the rear cavity by the sounder is not stable enough, and the problems of polarization, distortion, etc. are easily caused, and the acoustic effect is not ideal.
  • the volume of the sounding device of the existing structure is made small, the volume of the rear cavity of the sounding device is inevitably reduced. Therefore, it is necessary to provide a sounding device of a novel structure, which has a small volume and can have better performance to meet the development needs of electronic products.
  • the embodiment of the invention provides a sounder to meet the small volume requirement and also has better performance.
  • the present invention also provides a sound generator including a housing, a vibration system, and a magnetic circuit system;
  • the first end of the housing sequentially houses the vibration system and the magnetic circuit system from top to bottom;
  • the magnetic circuit system is provided with a rear sound hole
  • the housing includes a first portion corresponding to the vibration system and the magnetic circuit system, and a second portion integrally extending downwardly from the first portion beyond a bottom surface of the magnetic circuit system;
  • a second end portion of the housing is integrally provided with a bottom wall of the housing or a lower cover is mounted, a second portion of the housing, a bottom surface of the magnetic circuit system and a bottom wall of the housing or A rear cavity communicating with the rear sound hole is formed between the lower cover plates.
  • the housing is a straight-type structure with open ends;
  • the vibration system includes a diaphragm and a voice coil fixed under the diaphragm, and the diaphragm is fixed to the first end of the housing The end surface of the opening; the lower cover is mounted at the second end opening of the housing.
  • the magnetic circuit system includes a magnetic yoke and a central magnetic circuit portion and a side magnetic circuit portion mounted on an upper surface of the magnetic yoke;
  • At least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet.
  • an outer side of the side magnetic circuit portion is disposed adjacent to an inner wall of the housing.
  • the circumferential side of the yoke is disposed in abutment with the inner wall of the housing.
  • the yoke is rectangular, and a corner position of the yoke is provided with a first rear sound hole communicating with the magnetic gap and the rear acoustic cavity.
  • the central magnetic circuit portion includes a central magnet and a central magnetic conductive plate disposed on a top surface of the central magnet; and the central magnetic circuit portion is disposed on the magnetic circuit system to sequentially penetrate the magnetic conductive A through hole of the yoke and the center magnet serves as a part of the rear cavity, and the center magnetic conductive plate is provided with a second rear sound hole communicating with the through hole.
  • the ratio of the opening volume of the center magnet to the volume of the central magnet before the opening is less than or equal to 35%.
  • the second end of the housing is open, the lower end of the housing is mounted with the lower cover, and the inner wall of the first end of the housing is disposed toward the center of the housing The direction extending edge, the upper edge of the magnetic circuit system abuts and is fixed on the lower surface of the flange.
  • the first end of the housing is open, and an inner side of the end surface of the first end opening of the housing has a concave first step end surface, and the first step end surface has a surface for mounting the vibration The bottom and side of the membrane.
  • an upper cover plate is mounted on the housing above the diaphragm, and a rim of the upper cover is located inside a side surface of the first step end surface.
  • a first protrusion is disposed on an outer side of a bottom surface of the edge of the upper cover, and an ultrasonic line is disposed on the first protrusion;
  • a first groove is disposed at a position corresponding to the bottom surface of the first step end surface and the first protrusion portion, and the first protrusion portion of the upper cover plate is inserted into the first groove and the first The bottom surface of the groove is ultrasonically welded.
  • the first end of the housing is open, and the outer side of the end surface of the first end of the housing is provided with a second groove, and the diaphragm is fixed on the inner side of the end surface of the first end opening ;
  • An upper cover plate mounted on the casing is further disposed on the upper side of the diaphragm, and a second convex portion is disposed on an outer side of a bottom surface of the edge of the upper cover plate, and the second convex portion extends into the upper portion
  • the second groove is described and bonded.
  • the housing has a rectangular structure.
  • a ventilation barrier is disposed on the rear sound hole, and the rear cavity is filled with a sound absorbing material.
  • a filling hole for filling the sound absorbing material is opened on the bottom wall or the lower cover of the casing, and the filling hole is covered with a cover sheet.
  • the cover sheet is provided with a venting microhole that allows air to pass through and does not allow the sound absorbing material to pass through;
  • the cover sheet is provided with a leak hole, and the leak hole is covered with a damping net that allows air to pass through and does not allow the sound absorbing material to pass.
  • the second end of the housing is open, and the lower cover is installed at the second end opening of the housing, and the lower cover is made of metal.
  • the lower cover is in a flat shape; or the lower cover is a bowl-shaped structure having a bottom wall and a side wall.
  • the second end of the housing is open, the lower end of the housing is mounted with the lower cover, and the lower cover is bonded to the second of the housing by a glue layer.
  • the glue layer On the end face of the end opening; or
  • An inner side of the end surface of the second end opening of the housing has a recessed second step end surface, the second step end surface has a top surface and a side surface for mounting the lower cover;
  • the lower cover is a flat plate shape, an edge of the lower cover plate is provided with a recessed portion that is recessed toward the rear cavity direction, the recessed portion abutting a top surface of the second step end surface and a side surface of the second step end surface Forming a first adhesive tank, wherein the lower cover is fixed on the casing in the first adhesive tank; or the lower cover is a bowl having a bottom wall and a side wall a structure, the end of the side wall of the lower cover is bent outwardly to be provided with a mounting edge, the mounting edge abutting the top surface of the second step end surface and the side surface of the second step end surface Forming a second sol tank, and applying a glue to the second sol to fix the lower cover to the casing; or
  • the periphery of the lower cover is injection molded with a plastic edge that is ultrasonically welded to the second end opening of the housing.
  • the first end of the housing is open, and the second end of the housing is integrally provided with a bottom wall of the housing, and the bottom wall of the housing is entirely made of plastic material; or the shell
  • the body bottom wall includes an integrally injection molded piece of metal.
  • the housing includes a first portion corresponding to the vibration system and the magnetic circuit system, and a second portion integrally extending downward from the first portion beyond the bottom surface of the magnetic circuit system; and the second end of the housing
  • the end portion is integrally provided with a bottom wall of the housing or a lower cover is mounted, and a second portion of the housing, a magnetic circuit system and a bottom wall or a lower cover of the housing form a rear cavity, compared to the prior art.
  • the invention directly forms a sufficiently large rear cavity space by the lower end portion of the housing of the sounder.
  • the area determines the size of the entire sounding device in the electronic product, which contributes to the miniaturization of the product, and can balance the volume of the magnetic circuit system and the volume of the back cavity on the basis of miniaturization, thereby ensuring acoustic performance;
  • the rear cavity is disposed under the vibration system and the magnetic circuit system, and the shape of the rear cavity is regular, and the distance from the rear sound hole is close. Compared with the prior art, the same large cavity volume can be realized.
  • the embodiment of the invention only extends the design of the sounder housing, has a simple structure, and does not require assembly between the sounder and the box or the box structure. Simplify the manufacturing process and installation process to provide production efficiency.
  • the embodiment of the present invention further expands the volume of the rear cavity to improve the acoustic performance of the device by providing rear sound holes at the bottom edge and the central position of the magnetic circuit system, and effectively solves the vibration system of the miniaturized device.
  • the magnetic circuit pitch is small, and the acoustic resistance of the vibration becomes large, which makes the stability of the vibration system worse.
  • FIG. 1 is a schematic exploded view of a sounder according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a sound generator according to an embodiment of the present invention.
  • Figure 3 is a partial enlarged view of Figure 2;
  • FIG. 4 is a cross-sectional view of a sound generator according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a specific implementation of a yoke in a sound generator according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a top surface angle of a sounder according to an embodiment of the present invention.
  • FIG. 7 is a schematic perspective view of a bottom surface of a sounder according to an embodiment of the present invention.
  • FIG. 8 is a schematic view showing a connection structure of an upper cover and a casing in a sound generator according to an embodiment of the present invention
  • FIG. 9 is a schematic view showing a connection structure of a lower cover and a casing in a sound generator according to an embodiment of the present invention.
  • FIG. 10 is a schematic view showing another connection structure of a lower cover and a casing in a sounder according to an embodiment of the present invention.
  • FIG. 11 is a schematic view showing another connection structure of a lower cover and a casing in a sound generator according to an embodiment of the present invention.
  • Figure 12 is a partial enlarged view of Figure 11;
  • FIG. 13 is a schematic diagram of still another connection structure of a lower cover and a casing in a sounder according to an embodiment of the present invention.
  • FIG. 1 to FIG. 5 are schematic diagrams showing the structure of a sound generator according to an embodiment of the present invention.
  • a housing 10, a vibration system 20, and a magnetic circuit system 30 are included.
  • the first end of the housing 10 sequentially houses the fixed vibration system 20 and the magnetic circuit system 30 from top to bottom; as shown in FIG. 4 and FIG. 5, the magnetic circuit system 30 is located below the vibration system 20 and is fixed to the housing 10.
  • the magnetic circuit system 30 is provided with a rear sound hole 40. As shown in FIG.
  • the housing 10 includes a first portion 1001 corresponding to the vibration system 20 and the magnetic circuit system 30, and a second portion 1002 that extends integrally downwardly from the first portion 1001 beyond the bottom surface of the magnetic circuit system 30;
  • the two end portions are integrally provided with a bottom wall of the housing (not shown in the drawing) or a lower cover 50 is mounted separately, the second portion of the housing 1002, the bottom surface of the magnetic circuit system 30 and the bottom wall or the lower cover of the housing
  • a rear cavity 60 that communicates with the rear sound hole 40 is formed between the plates 50.
  • the housing 10 described above may be configured to have an open end or an open end structure.
  • the open end structure may be an upper end opening or a lower end opening, and the other end is a closed end.
  • the closed end is an upper end corresponding to the vibration system, a small sound hole is allowed to be opened on the closed end, and the vibration system is After the magnetic circuit system is assembled, the open end is closed with a cover.
  • the housing 10 is a straight tubular structure with open ends; as shown in FIGS. 1 and 2, the first end opening of the housing 10 is mounted with a vibration system 20; the vibration system 20 includes a diaphragm. 21 and a voice coil 22 fixed under the diaphragm 21, the diaphragm 21 is fixed to the end surface of the first end of the casing 10, and the lower cover 50 is mounted at the opening of the second end of the casing 10.
  • the technical solution provided by the embodiment of the present invention directly forms a sufficiently large rear cavity space by the lower end portion of the housing of the sounder, and does not need to additionally configure the box structure forming the rear cavity, so it is not horizontal.
  • the space is increased in the direction, and the peripheral area of the sound generator housing determines the size of the entire sounding device in the electronic product, which contributes to miniaturization of the product, and can take into consideration the volume of the magnetic circuit system on the basis of miniaturization.
  • the back cavity volume to ensure the acoustic performance secondly, the rear cavity is disposed under the vibration system and the magnetic circuit system, the shape of the rear cavity is regular, and the distance from the rear sound hole is close, which is larger than the prior art.
  • the rear cavity volume can achieve a better acoustic effect; and the technical solution provided by the embodiment of the invention only extends the design of the sounder housing, has a simple structure, and does not require the sounder and the box or the box structure. The assembly between them can simplify the manufacturing process and installation process and provide production efficiency.
  • the embodiment of the present invention further expands the volume of the rear cavity to improve the acoustic performance of the device by providing rear sound holes at the bottom edge and the central position of the magnetic circuit system, and effectively solves the vibration system of the miniaturized device.
  • the magnetic circuit pitch is small, and the acoustic resistance of the vibration becomes large, which makes the stability of the vibration system worse.
  • the magnetic circuit system 30 includes a yoke 31 and a central magnetic circuit portion 301 and a side magnetic circuit portion 302 mounted on the upper surface of the yoke 31; A magnetic gap accommodating the voice coil 22 is formed between the road portion 301 and the side magnetic circuit portion 302; at least one of the center magnetic circuit portion 301 and the side magnetic circuit portion 302 is provided with a permanent magnet.
  • the central magnetic circuit portion 301 includes a center magnet 32 and a center magnetic conductive plate 33;
  • the side magnetic circuit portion 302 includes an edge magnetic conductive plate 35 and an edge magnetic plate 34.
  • the outer side of the side magnetic circuit portion 302 is placed against the inner wall of the casing 10. Further, the circumferential side of the yoke 31 and the inner wall of the housing 10 are also disposed in abutment.
  • the yoke 31 may be rectangular, and the corner position of the corresponding yoke 31 may be provided with a first rear sound hole 401 communicating with the magnetic gap and the rear cavity 60. More specifically, as shown in FIG. 1, the yoke 31 has a polygonal structure in which four corner portions are provided with notches; the corner position of the yoke 31, that is, a position close to the notch edge is provided with a magnetic gap and a rear The first rear sound hole 401 is connected to the cavity 60.
  • the central magnetic circuit portion 301 of the magnetic circuit system 30 includes a central magnet 32 and a central magnetic conductive plate 32 disposed on the top surface of the central magnet 32; and is located at the central magnetic circuit portion 301, and is provided on the magnetic circuit system 30.
  • a through hole penetrating through the yoke 31 and the center magnet 32 in this order is provided as a part of the rear chamber 60, and the center magnetic conductive plate 33 is provided with a second rear sound hole 402 communicating with the through hole.
  • the present embodiment is provided with a yoke 31 and a center on the center magnetic conductive plate 33.
  • a second rear sound hole 402 communicating with the through hole on the magnet 32 serves as a fifth rear sound hole.
  • the four first rear sound holes 401 and the second rear sound holes 402 together form a rear sound hole 40 disposed on the magnetic circuit system.
  • the fifth rear sound hole can not only play the role of the sound cavity 60 after the expansion, but also solve the problem that the vibration system of the miniaturized device has a small distance between the vibration system and the vibration, and the vibration resistance of the vibration system becomes large, which makes the stability of the vibration system worse. .
  • the central region of the central magnet 32 contributes less to the BL of the sounder (a parameter that measures the strength of the drive system in the sounder) than the boundary region, and therefore, in the case where the volume of the rear cavity 60 is limited, the central magnet 32 is used.
  • the central area is hollowed out to increase the volume of the rear cavity, which helps to improve the performance of the product.
  • the area in which the center magnet 32 is hollowed out has little effect on the BL value of the magnetic circuit system 30, it is somewhat influential. If the hollowed out area of the center magnet 32 is too large, its effect on the BL value of the magnetic circuit system 30 cannot be ignored. If the knockout area is too large, the smaller the BL value of the magnetic circuit system 30, the lower the performance of the product.
  • the opening volume of the central magnet should satisfy that the ratio of the opening volume of the central magnet 32 to the volume of the central magnet 32 before the opening is less than or equal to 35%, and further can be controlled at 5 Within the range of %-30%.
  • the inner wall of the first end of the casing 10 is provided.
  • the inner side of the end face of the first end opening of the housing 10 has a recessed first step end surface 11 having a diaphragm for mounting the diaphragm
  • the bottom surface 111 and the side surface 112 of 21 Referring to FIGS. 1 and 5, an upper cover 70 mounted on the casing 10 is further disposed above the diaphragm 21, and the rim of the upper cover 70 is located inside the side surface 112 of the first step end surface 11.
  • the sound generator provided by the embodiment of the present invention may further include: a centering support piece 200 disposed between the diaphragm 21 and the voice coil 22, and a reinforcement disposed on a side of the diaphragm 21 away from the magnetic circuit system 30.
  • the portion 23; the reinforcing portion 23 is fixed to the diaphragm 21 as shown in FIG.
  • FIG. 6 and FIG. 7 are schematic diagrams showing the outer contour of an implementation form of the sound generator provided by the embodiment of the present invention.
  • the housing 10 of the sound generator provided in this embodiment may have a rectangular structure.
  • the sound generator using the technical solution provided by the embodiment of the present invention can be prepared into a size of a plane size of (6-30) mm*(8-30) mm, and then after being provided with a capacity expansion effect on the magnetic circuit system. The way of the sound hole achieves the purpose of reducing the height dimension of the sounder.
  • the outer side of the bottom surface of the edge of the upper cover 70 is provided with a first convex portion 701, and the first convex portion 701 is provided with an ultrasonic line; the bottom surface of the first step end surface 11 is The first convex portion 701 is provided with a first groove corresponding to the position, and the first convex portion 701 of the upper cover 70 is inserted into the first groove and ultrasonically welded to the bottom surface of the first groove.
  • a second convex portion is disposed on a bottom surface of the first step end surface, and an ultrasonic line is disposed on the second convex portion; a third groove is disposed at a bottom surface of the edge of the upper cover plate corresponding to the ultrasonic line The second raised portion of the first step end face is inserted into the third groove and fixed by ultrasonic welding; the realized structure is not provided in the drawings.
  • the outer side of the end surface of the first end of the housing 10 is provided with a second recess 1005, and the diaphragm 21 is fixed at the first end.
  • the inner side of the end surface of the opening; the upper surface of the diaphragm 21 is further provided with an upper cover 70 mounted on the housing 10, and the outer side of the bottom surface of the upper cover 70 is provided with a second convex portion 702, and the second convex portion 702
  • the second groove 1005 is extended and fixed.
  • the rear sound hole 40 is provided with a gas permeable spacer 80, and the rear chamber 60 is filled with a sound absorbing material.
  • the sound absorbing material may be a zeolitic material, an activated carbon material, or other materials having a expansion effect, which is not limited in this patent.
  • the venting spacer 80 is a mesh that allows air to pass through and does not allow the sound absorbing material to pass through, and is used to isolate the sound absorbing material from entering the magnetic circuit system. Filling the sound absorbing material in the back cavity can further increase the volume of the back cavity, which helps to improve the performance of the sounder.
  • the ventilation chamber 80 is directly disposed on the rear sound hole 40, and the rear cavity space can be used for filling the sound absorbing material, thereby increasing the filling amount of the sound absorbing material and achieving a better expansion effect.
  • the magnetic circuit system 30 is provided with a through hole sequentially penetrating the yoke 31 and the center magnet 32 as a part of the rear chamber 60, and the center magnetic conductive plate 33 is provided with a second passage communicating with the through hole.
  • the sound hole 402. The through hole penetrating the yoke 31 and the center magnet 32 increases the back cavity and fills the sound absorbing material for expansion, and the second rear sound hole 402 is located at the center of the magnetic circuit system, which can increase the pass. The contact rate of the sound absorbing material at the hole position with the air achieves the best expansion effect.
  • a filling hole 51 for filling a sound absorbing material is opened on a bottom wall (not shown) or a lower cover 50 of the casing.
  • the upper package is provided with a cover sheet 52.
  • the cover sheet 52 can be directly a gas-tight hard sheet and only serves to block the sound absorbing material.
  • the cover sheet 52 may further be provided with a venting micro hole for allowing air to pass through and not allowing the sound absorbing material to pass through; or the cover piece 52 is further provided with a leakage hole 521 and on the leakage hole 521 It is covered with a damping net 53 that allows air to pass through and does not allow the sound absorbing material to pass.
  • the filling hole 51 serve as a back cavity leakage hole, which can be used to balance the air pressure inside and outside the sounder. Further, the size of the acoustic resistance can be adjusted by adjusting the size of the venting micropores or adjusting the size of the mesh of the damper mesh.
  • the lower cover 50 is installed at the opening of the second end of the housing 10.
  • the lower cover 50 of the embodiment can be made of a metal material, and the metal material can be made thinner and takes up less space.
  • the lower cover 50 may be flat (such as the structure shown in FIGS. 10, 11 and 13); or the lower cover 50 is a bowl structure having a bottom wall 501 and a side wall 502 (as shown in FIG. 9), the lower cover
  • the plate 50 is a metal material and has a bowl-like structure
  • the metal under cover 50 of the bowl structure has high strength and takes up a small space, and the presence of the side wall 502 forms a part of the rear cavity space. Therefore, the height of the casing 10 can be reduced, and the problem that the excessively high plastic casing needs to increase the wall thickness to ensure the overall structural strength and thus the occupied space is more advantageous for miniaturization of the product.
  • the lower cover 50 can be connected to the second end opening of the housing 10 in the following three manners.
  • the embodiments of the present invention are not limited to the following connection manners.
  • the lower cover 50 is bonded to the end surface of the second end opening of the casing 10 through the adhesive layer 90.
  • the rim of the lower cover 50 extends to be flush with the outer side wall of the housing 10, and the back surface of the lower cover 50 opposite to the open end surface of the second end of the housing 10 has a back surface. gum.
  • the lower cover 50 is bonded to the end surface of the second end of the housing 10 by its own adhesive backing to seal the rear chamber.
  • the inner side of the end face of the second end opening of the casing 10 has a recessed second step end face 12, and the second step end face 12 has a top for mounting the lower cover 50.
  • the lower cover 50 has a flat shape, and the edge of the lower cover 50 is provided with a recess 54 recessed toward the rear cavity 60, and the recess 54 abuts against the second step.
  • a first adhesive tank 55 is formed between the top surface 121 of the end surface and the side surface 122 of the second step end surface 12, and the lower cover 50 is fixed to the casing 10 by applying glue in the first plastic tank 55.
  • FIG. 9 the inner side of the end face of the second end opening of the casing 10 has a recessed second step end face 12
  • the second step end face 12 has a top for mounting the lower cover 50.
  • the lower cover 50 has a flat shape, and the edge of the lower cover 50 is provided with a recess 54 recessed toward the rear cavity 60, and the recess 54 abuts against the second step.
  • the lower cover 50 is a bowl-like structure having a bottom wall 501 and a side wall 502, and the end of the side wall 502 of the lower cover 50 is bent outward to be provided with a mounting edge 503, and the mounting edge is provided.
  • 503 abuts the top surface 121 of the second step end surface 12 and forms a second glue groove 504 between the second step end surface 12 and the second surface of the second step end surface 12, and the lower cover 50 is fixed in the second adhesive tank 504.
  • the housing 10 On the housing 10.
  • the periphery of the lower cover 50 is injection molded with a plastic edge 100, and the plastic edge 100 is ultrasonically welded to the opening of the second end of the housing 10.
  • first end of the housing 10 may be open, and the second end of the housing 10 is integrally provided with a bottom wall of the housing, wherein the bottom wall of the housing may be made entirely of plastic material;
  • the bottom wall of the housing includes an integrally injection molded piece of metal for increased space.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本发明实施例提供一种发声器，包括壳体、振动系统和磁路系统；所述壳体的第一端由上到下依次收容固定所述振动系统和所述磁路系统；所述磁路系统上设有后声孔；所述壳体包括对应所述振动系统和所述磁路系统的第一部分，以及由所述第一部分一体向下延伸超出所述磁路系统底面的第二部分；所述壳体的第二端端部一体设有壳体底壁或分体安装有下盖板，所述壳体的第二部分、所述磁路系统的底面与所述壳体底壁或下盖板之间形成有与所述后声孔连通的后腔。本发明提供的技术方案有助于实现产品的小型化。

Description

发声器 技术领域
本发明涉及发声装置技术领域。
背景技术
发声装置是电子产品中重要的元器件，用于将电信号转变成声信号。电子产品的发展趋势是越来越薄，且为了实现更多的功能，电子产品中的元器件越来越多，势必给发声装置预留的空间越来越小，且电子产品越来越注重用户的音乐体验，因此要求发声装置具有更好的音质。
为了提升音乐体验效果，现有技术中的发声装置将发声器安装在一个具有容积的箱体中，发声器包括壳体和收容固定于壳体内的磁路系统和振动系统，发声器与箱体之间形成后腔，后腔空间越大，则产品的低频谐振频率越低，因此产品的低频性能得到提升。现有技术的发声装置通常有两种结构：一种是类似于音箱的结构，箱体为长方体型，发声器固定在箱体的前面板上，形成了厚度方向和后水平方向上的后腔，不利于产品的薄型化和小型化；另一种结构是，箱体具有收容发声器的收容腔以及位于发声器侧面的后腔，将后腔成型在发声器的侧面可以获得尽可能大的后腔体积，但同时也导致了整个发声装置在水平方向占据的空间较大，不利于产品的小型化。
并且，现有技术中的发声装置，后腔形状不规则，由发声器进入后腔的气流不够稳定，易造成偏振、失真等问题，声学效果不够理想。
若将现有结构的发声装置体积变小，势必会减小发声装置后腔体积。因此，需要提供一种新型结构的发声装置，具有小体积的同时还能具有较好的性能，以满足电子产品的发展需求。
发明内容
本发明实施例提供了一种发声器，以满足小体积要求的同时还能具有较好的性能。
本发明还提供了一种发声器，包括壳体、振动系统和磁路系统；其中，
所述壳体的第一端由上到下依次收容固定所述振动系统和所述磁路系统；
所述磁路系统上设有后声孔；
所述壳体包括对应所述振动系统和所述磁路系统的第一部分，以及由所述第一部分一体向下延伸超出所述磁路系统底面的第二部分；
所述壳体的第二端端部一体设有壳体底壁或分体安装有下盖板，所述壳体的第二部分、所述磁路系统的底面与所述壳体底壁或下盖板之间形成有与所述后声孔连通的后腔。
可选地，所述壳体为两端开口的直筒型结构；所述振动系统包括振膜和固定于所述振膜下方的音圈，所述振膜固定于所述壳体的第一端开口的端面上；所述壳体的第二端开口处安装有所述下盖板。
可选地，所述磁路系统包括导磁轭和安装于导磁轭上表面的中心磁路部分和边磁路部分；
所述中心磁路部分和边磁路部分之间形成容纳所述音圈的磁间隙；
所述中心磁路部分和所述边磁路部分中的至少一个设有永磁体。
可选地，所述边磁路部分的外侧与所述壳体的内壁贴靠设置。
可选地，所述导磁轭的周侧与所述壳体的内壁贴靠设置。
可选地，所述导磁轭为矩形，所述导磁轭的角部位置设有与所述磁间隙和所述后声腔连通的第一后声孔。
可选地，所述中心磁路部分包括中心磁铁和设于所述中心磁铁顶面的中心导磁板；位于所述中心磁路部分，所述磁路系统上设有依次贯穿所述导磁轭和所述中心磁铁的通孔作为所述后腔的一部分，所述中心导磁板上设有与所述通孔相连通的第二后声孔。
可选地，所述中心磁铁的开孔体积相对于开孔前的中心磁铁体积的比例小于等于35％。
可选地，所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板，所述壳体的第一端的内壁上设有朝向壳体的中心方向延伸的凸沿，所述磁路系统的上边缘抵接固定在所述凸沿的下表面上。
可选地，所述壳体的第一端开口，所述壳体的所述第一端开口的端面的内侧具有凹陷的第一台阶端面，所述第一台阶端面具有用于安装所述振膜的底面和侧面。
可选地，所述振膜的上方还设有安装在所述壳体上的上盖板，所述上盖板的边沿位于所述第一台阶端面的侧面的内侧。
可选地，所述上盖板的边沿的底面的外侧设有第一凸起部，且在所述第一凸起部上设有超声线；
所述第一台阶端面的底面与所述第一凸起部对应的位置设有第一凹槽，所述上盖板的第一凸起部插入所述第一凹槽并与所述第一凹槽的底面超声焊接。
可选地，所述壳体的第一端开口，所述壳体的第一端开口的端面的外侧设有第二凹槽，所述振膜固定在所述第一端开口的端面的内侧；
所述振膜的上方还设有安装在所述壳体上的上盖板，所述上盖板的边沿的底面的外侧设有第二凸起部，所述第二凸起部伸入所述第二凹槽并粘接固定。
可选地，所述壳体为矩形结构。
可选地，所述后声孔上设有透气隔离件，所述后腔中填充有吸音材料。
可选地，所述壳体底壁或下盖板上开设有用于灌装所述吸音材料的灌装孔，所述灌装孔上封装有盖片。
可选地，所述盖片上设有允许空气通过且不允许吸音材料通过的透气微孔；或者，
所述盖片上设有泄漏孔，且在所述泄漏孔上覆盖有允许空气通过且不允许吸音材料通过的阻尼网。
可选地，所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板，所述下盖板为金属制成。
可选地，所述下盖板为平板状；或者，所述下盖板为具有底壁和侧壁的碗状结构。
可选地，所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板,所述下盖板通过胶层粘接在所述壳体的第二端开口的端面上；或者
所述壳体的所述第二端开口的端面的内侧具有凹陷的第二台阶端面，所述第二台阶端面具有用于安装所述下盖板的顶面和侧面；所述下盖板为平板状，所述下盖板的边缘设有朝向所述后腔方向凹陷的凹陷部，所述凹陷部抵接在所述第二台阶端面的顶面并且与所述第二台阶端面的侧面之间形成第一容胶槽，在所述第一容胶槽内涂胶将所述下盖板固定在所述壳体上；或者，所述下盖板为具有底壁和侧壁的碗装结构，所述下盖板的侧壁的端部向外侧弯折设有安装边缘，所述安装边缘抵接在所述第二台阶端面的顶面并且与所述第二台阶端面的侧面之间形成第二溶胶槽，在所述第二溶胶草内涂胶将所述下盖板固定在所述壳体上；或者
所述下盖板的周边注塑有塑料边缘，所述塑料边缘与所述壳体的所述第二端开口处超声焊接。
可选地，所述壳体的第一端开口，所述壳体的第二端端部一体设有壳体底壁，所述壳体底壁全部为塑料材质制成；或者，所述壳体底壁包括一体注塑的金属片。
本发明实施例提供的技术方案中，壳体包括对应振动系统和磁路系统的第一部分，以及由该第一部分一体向下延伸超出磁路系统底面的第二部分；并且壳体的第二端端部一体设有壳体底壁或分体安装有下盖板，壳体的第二部分、磁路系统与壳体底壁或下盖板之间形成后腔，相比于现有技术，本发明由发声器的壳体下端部分直接形成足够大的后腔空间，首先，不需要额外配置形成后腔的箱体结构，因此不会在水平方向上增加占用空间，发声器壳体的外围面积即决定了整个发声装置在电子产品中的占用空间大小，有助于实现产品的小型化，并且在小型化基础上能够兼顾磁路系统的体积以及后腔体积，进而保证声学性能；其次，在正对振动系统和磁路系统的下方设置后腔，后腔形状规则，与后声孔的距离近，相比于现有技术，同样大的后腔体积，能够实现更好的声学效果；并且本发明实施例提供的技术方案，仅是对发声器的壳体进行延长设计，结构简单，且不需要进行发 声器与箱体或箱体结构之间的装配，可以简化制作工艺与安装工艺，提供生产效率。另外，本发明实施例还通过在磁路系统的底部边缘及中心位置处均设置后声孔的方式，扩大后腔体积以提升装置的声学性能，还有效的解决了因为小型化装置振动系统与磁路间距小，振动的声阻会变大使得振动系统稳定性变差的问题。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本发明的实施例，并且连同说明书一起用于解释本发明的原理。
图1是本发明一实施例提供的发声器的爆炸示意图；
图2是本发明一实施例提供的发声器的剖面示意图；
图3是图2的局部放大示意图；
图4是本发明一实施例提供的发声器的剖面示意图；
图5是本发明一实施例提供的发声器中导磁轭的一具体实现的结构示意图；
图6是本发明一实施例提供的发声器的顶面角度示意图；
图7是本发明一实施例提供的发声器的底面角度示意图；
图8是本发明一实施例提供的发声器中上盖板与壳体的一种连接结构示意图；
图9是本发明一实施例提供的发声器中下盖板与壳体的一种连接结构示意图；
图10是本发明一实施例提供的发声器中下盖板与壳体的另一种连接结构示意图；
图11是本发明一实施例提供的发声器中下盖板与壳体的又一种连接结构示意图；
图12是图11的局部放大示意图；
图13是本发明一实施例提供的发声器中下盖板与壳体的又一种连接结构示意图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
图1至图5示出了本发明一实施例提供的一种用于发声器的结构示意图。如图1、图2和图4所示，包括壳体10、振动系统20和磁路系统30。其中，壳体10的第一端由上到下依次收容固定振动系统20和磁路系统30；结合图4和图5所示，磁路系统30位于振动系统20的下方且固定于壳体10内，磁路系统30上设有后声孔40。如图4所示，壳体10包括对应振动系统20和磁路系统30的第一部分1001，以及由第一部分1001一体向下延伸超出磁路系统30底面的第二部分1002；壳体10的第二端端部一体设有壳体底壁(附图未示出)或分体安装有下盖板50，壳体的第二部分1002、磁路系统30的底面与壳体底壁或下盖板50之间形成有与后声孔40连通的后腔60。
其中，根据实际情况，上述的壳体10可以选择一端开口或两端开口结构。一端开口结构中可以是上端开口也可以是下端开口，另一端为封闭端，该封闭端为与振动系统对应的上端时，允许在封闭端上开设小的声孔，从开口端对振 动系统和磁路系统进行装配后，用盖板对开口端进行封闭。
在一具体的实现结构中，壳体10为两端开口的直筒型结构；如图1和图2所示，壳体10的第一端开口处安装有振动系统20；振动系统20包括振膜21和固定于振膜21下方的音圈22，振膜21固定于壳体10的第一端开口的端面上，壳体10的第二端开口处安装有下盖板50。
相比于现有技术，本发明实施例提供的技术方案，由发声器的壳体下端部分直接形成足够大的后腔空间，不需要额外配置形成后腔的箱体结构，因此不会在水平方向上增加占用空间，发声器壳体的外围面积即决定了整个发声装置在电子产品中的占用空间大小，有助于实现产品的小型化，并且在小型化基础上能够兼顾磁路系统的体积以及后腔体积，进而保证声学性能；其次，在正对振动系统和磁路系统的下方设置后腔，后腔形状规则，与后声孔的距离近，相比于现有技术，同样大的后腔体积，能够实现更好的声学效果；并且本发明实施例提供的技术方案，仅是对发声器的壳体进行延长设计，结构简单，且不需要进行发声器与箱体或箱体结构之间的装配，可以简化制作工艺与安装工艺，提供生产效率。另外，本发明实施例还通过在磁路系统的底部边缘及中心位置处均设置后声孔的方式，扩大后腔体积以提升装置的声学性能，还有效的解决了因为小型化装置振动系统与磁路间距小，振动的声阻会变大使得振动系统稳定性变差的问题。
在一具体的实现结构中，如图1和图2所示，磁路系统30包括导磁轭31和安装于导磁轭31上表面的中心磁路部分301和边磁路部分302；中心磁路部分301和边磁路部分302之间形成容纳音圈22的磁间隙；中心磁路部分301和边磁路部分302中的至少一个设有永磁体。具体的，中心磁路部分301包括中心磁铁32和中心导磁板33；边磁路部分302包括边导磁板35和边磁铁34。为了减小发声器的体积，实现磁路系统的最大化，如图2所示，边磁路部分302的外侧与壳体10的内壁贴靠设置。进一步的，导磁轭31的周侧与壳体10的内壁也为贴靠设置。
进一步的，导磁轭31可为矩形，相应的导磁轭31的角部位置可设有与磁间隙和后腔60连通的第一后声孔401。更具体的，如图1所示，导磁轭31为四个角部均设有缺口的多边形结构；导磁轭31的角部位置，即靠近缺口边缘 的位置处设有与磁间隙和后腔60连通的第一后声孔401。
再进一步的，参见图2，磁路系统30的中心磁路部分301包括中心磁铁32和设于中心磁铁32顶面的中心导磁板32；位于中心磁路部分301，磁路系统30上设有依次贯穿导磁轭31和中心磁铁32的通孔作为后腔60的一部分，中心导磁板33上设有与通孔相连通的第二后声孔402。
因导磁轭31四角处的四个第一后声孔401并不能达到最佳的与后腔60空气流通效果，故本实施例在中心导磁板33上设有与导磁轭31和中心磁铁32上的通孔连通的第二后声孔402，作为第五处后声孔。四个第一后声孔401和第二后声孔402共同构成了设置在磁路系统上的后声孔40。其中，第五处后声孔不仅能起到扩容后声腔60的作用，还能解决因为小型化装置振动系统与磁路间距小，振动的声阻会变大使得振动系统稳定性变差的问题。
这里需要补充的是：中心磁铁32中心区域对发声器的BL(衡量发声器中驱动系统强度的一个参数)贡献小于边界区域，因此，在后腔60体积受限的情况下，将中心磁铁32中心区域挖空，以增大后腔体积，有助于提升产品的性能。虽然中心磁铁32挖空的区域对磁路系统30的BL值的影响小，但多少还是存在影响的。如果，中心磁铁32的挖空区域太大，其对磁路系统30的BL值的影响就不能被忽视了。挖空区域过大，磁路系统30的BL值就会越小，产品的性能就会越低。因此，需要找到一个平衡范围，使得中心磁铁32挖空增加的后腔60体积对产品性能的提升量要大于磁路系统BL值减小致使产品性能降低的量，从而实现对产品性能的优化。通过仿真得知，当中心磁铁32挖空的体积占中心磁铁原体积的35％以内时，产品性能得到提升。当中心磁铁32挖空的体积超过这个范围时，磁路系统30的BL值急剧减小。此时后腔60空间增加对性能的提升效果不如磁路系统BL值减小造成的产品性能降低效果，综合表现为产品性能降低。因此，本发明提供的上述技术方案中，中心磁铁的开孔体积应满足：中心磁铁32的开孔体积相对于开孔前的中心磁铁32体积的比例小于等于35％，进一步的可以控制在5％-30％的范围内。
进一步的，在壳体10的第二端开口，且壳体的第二端开口处安装有下盖板70的情况下，如图3所示，壳体10的第一端的内壁上设有朝向壳体10的 中心方向延伸的凸沿1003，磁路系统30的上边缘抵接固定在凸沿1003的下表面上。
在壳体10的第一端开口的情况下，继续参见图3，壳体10的第一端开口的端面的内侧具有凹陷的第一台阶端面11，第一台阶端面11具有用于安装振膜21的底面111和侧面112。参照图1和图5所示，振膜21的上方还设有安装在壳体10上的上盖板70，上盖板70的边沿位于第一台阶端面11的侧面112的内侧。
更具体的，本发明实施例提供的发声器，还可包括：设置振膜21与音圈22之间的定心支片200，以及设置于振膜21远离磁路系统30一侧的补强部23；补强部23与振膜21固定，如图1所示。
图6和图7示出了本发明实施例提供的发声器的一种实现形式的外轮廓示意图。如图6和图7所示，本实施例提供的发声器的壳体10可以为矩形结构。例如，采用本发明实施例提供的技术方案的发声器，可制备成平面尺寸为(6-30)mm*(8-30)mm的尺寸，再通过在磁路系统上设置具有扩容效果的后声孔的方式实现降低发声器的高度尺寸的目的。
进一步的，如图8所示，上盖板70的边沿的底面的外侧设有第一凸起部701，且在第一凸起部701上设有超声线；第一台阶端面11的底面与第一凸起部701对应的位置设有第一凹槽，上盖板70的第一凸起部701插入第一凹槽并与第一凹槽的底面超声焊接。或者，第一台阶端面的底面上设有第二凸起部，且在第二凸起部上设有超声线；上盖板的边沿的底面与超声线对应的位置处设有第三凹槽，第一台阶端面的第二凸起部插入第三凹槽并通过超声焊接固定；附图中未提供该实现结构。
进一步的，在壳体10的第一端开口的情况下，如图9所示，壳体10的第一端开口的端面的外侧设有第二凹槽1005，振膜21固定在第一端开口的端面的内侧；振膜21的上方还设有安装在壳体10上的上盖板70，上盖板70的边沿底面的外侧设有第二凸起部702，第二凸起部702伸入第二凹槽1005并粘接固定。
进一步的，如图1和图2所示，后声孔40上设有透气隔离件80，后腔60 中填充有吸音材料。吸音材料可以是沸石材料、活性炭材料、或者其他的具有扩容效果的材料，本专利中不做限定。其中，透气隔离件80为允许空气通过且不允许吸音材料通过的网布，用于对吸音材料进行隔离，避免其进入磁路系统内。在后腔中填充吸音材料可有进一步增大后腔的体积，有助于提升发声器的性能。直接在后声孔40上设置透气隔离件80的方式，可以将后腔空间全部用来灌装吸音材料，增大吸音材料灌装量，实现更好的扩容效果。并且结合实施方案“在磁路系统30上设有依次贯穿导磁轭31和中心磁铁32的通孔作为后腔60的一部分，中心导磁板33上设有与通孔相连通的第二后声孔402。贯穿导磁轭31和中心磁铁32的通孔在增大后腔并填充吸音材料进行扩容的情况下，第二后声孔402位于磁路系统的中心位置，可以增大该通孔位置处的吸音材料与空气的接触率，实现最佳扩容效果。
进一步的，如图1、图2和图7所示，在壳体底壁(图中未示出)或下盖板50上开设有用于灌装吸音材料的灌装孔51，灌装孔51上封装设有盖片52。该盖片52可以直接是不透气的硬质片，只作为封堵吸音材料的作用。作为另一种实施方式，该盖片52上还可设有允许空气通过且不允许吸音材料通过的透气微孔；或者，该盖片52上还设有泄漏孔521，且在泄漏孔521上覆盖有允许空气通过且不允许吸音材料通过的阻尼网53。上述具体实施方式，使得灌装孔51起到兼做后腔泄漏孔的用途，可以用来平衡发声器内外气压。进一步的，可以通过调节透气微孔的大小或者调节阻尼网的网孔大小，调节声阻的大小。
在实际实施时，在壳体10的第二端开口处安装有下盖板50，本实施例中的下盖板50可采用金属材料制成，金属材料可以做的更薄，占用空间更小。下盖板50可以是平板状(如图10、11和13所示的结构)；或者下盖板50为具有底壁501和侧壁502的碗装结构(如图9所示)，下盖板50为金属材料且呈碗状结构的实施方式中，碗状结构的金属下盖板50具有较高的强度，且占用空间小，并且侧壁502的存在，形成了一部分的后腔空间，因此壳体10的高度可以减小，避免过高的塑料壳体需要将壁厚做大来保证整体结构强度、进而会增大占用空间的问题，更有利于实现产品小型化。
参见图9至图13所示，本实施例提供的所述发声器中，下盖板50可采用如下三种方式实现与壳体10的第二端开口的连接。当然，本发明实施例不仅限于如下几种连接方式。
方式一，如图10所示，下盖板50通过胶层90粘接在壳体10的第二端开口的端面上。具体的，如图10所示，下盖板50的边沿延伸至与壳体10的外侧壁平齐，下盖板50的与壳体10的第二端开口端面相对的板面上带有背胶。下盖板50通过其自带的背胶粘接在壳体10的第二端开口的端面上，以密封后腔。
方式二，如图9、11和图12所示，壳体10的第二端开口的端面的内侧具有凹陷的第二台阶端面12，第二台阶端面12具有用于安装下盖板50的顶面121和侧面122；如图11和12所示，下盖板50为平板状，下盖板50的边缘设有朝向后腔60方向凹陷的凹陷部54，凹陷部54抵接在第二台阶端面的顶面121并且与第二台阶端面12的侧面122之间形成第一容胶槽55，在第一容胶槽55内涂胶将下盖板50固定在壳体10上。或者，如图9所示，下盖板50为具有底壁501和侧壁502的碗状结构，下盖板50的侧壁502的端部向外侧弯折设有安装边缘503，安装边缘503抵接在第二台阶端面12的顶面121并且与第二台阶端面12的侧面122之间形成第二容胶槽504，在第二容胶槽504内涂胶将下盖板50固定在壳体10上。
方式三，如图13所示，下盖板50的周边注塑有塑料边缘100，塑料边缘100与壳体10的第二端开口处超声焊接。
在另一具体实施方式中，可以是壳体10的第一端开口，壳体10的第二端端部一体设有壳体底壁，其中壳体底壁可以是全部为塑料材质制成；或者，壳体底壁包括一体注塑的金属片，用于增大空间。
虽然已经通过示例对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (21)

  1. 一种发声器，其特征在于，包括壳体、振动系统和磁路系统；其中，
    所述壳体的第一端由上到下依次收容固定所述振动系统和所述磁路系统；
    所述磁路系统上设有后声孔；
    所述壳体包括对应所述振动系统和所述磁路系统的第一部分，以及由所述第一部分一体向下延伸超出所述磁路系统底面的第二部分；
    所述壳体的第二端端部一体设有壳体底壁或分体安装有下盖板，所述壳体的第二部分、所述磁路系统的底面与所述壳体底壁或下盖板之间形成有与所述后声孔连通的后腔。
  2. 根据权利要求1所述的一种发声器，其特征在于，
    所述壳体为两端开口的直筒型结构；
    所述振动系统包括振膜和固定于所述振膜下方的音圈，所述振膜固定于所述壳体的第一端开口的端面上；
    所述壳体的第二端开口处安装有所述下盖板。
  3. 根据权利要求1或2所述的一种发声器，其特征在于，所述磁路系统包括导磁轭和安装于导磁轭上表面的中心磁路部分和边磁路部分；
    所述中心磁路部分和边磁路部分之间形成容纳所述音圈的磁间隙；
    所述中心磁路部分和所述边磁路部分中的至少一个设有永磁体。
  4. 根据权利要求3所述的一种发声器，其特征在于，所述边磁路部分的外侧与所述壳体的内壁贴靠设置。
  5. 根据权利要求3所述的一种发声器，其特征在于，所述导磁轭的周侧与所述壳体的内壁贴靠设置。
  6. 根据权利要求3所述的一种发声器，其特征在于，所述导磁轭为矩形，所述导磁轭的角部位置设有与所述磁间隙和所述后腔连通的第一后声孔。
  7. 根据权利要求3所述的一种发声器，其特征在于，所述中心磁路部分包括中心磁铁和设于所述中心磁铁顶面的中心导磁板；位于所述中心磁路部分，所述磁路系统上设有依次贯穿所述导磁轭和所述中心磁铁的通孔作为所述 后腔的一部分，所述中心导磁板上设有与所述通孔相连通的第二后声孔。
  8. 根据权利要求7所述的一种发声器，其特征在于，所述中心磁铁的开孔体积相对于开孔前的中心磁铁体积的比例小于等于35％。
  9. 根据权利要求1或2所述的一种发声器，其特征在于，所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板，所述壳体的第一端的内壁上设有朝向壳体的中心方向延伸的凸沿，所述磁路系统的上边缘抵接固定在所述凸沿的下表面上。
  10. 根据权利要求1或2所述的一种发声器，其特征在于，所述壳体的第一端开口，所述壳体的所述第一端开口的端面的内侧具有凹陷的第一台阶端面，所述第一台阶端面具有用于安装所述振膜的底面和侧面。
  11. 根据权利要求10所述的一种发声器，其特征在于，所述振膜的上方还设有安装在所述壳体上的上盖板，所述上盖板的边沿位于所述第一台阶端面的侧面的内侧。
  12. 根据权利要求11所述的一种发声器，其特征在于，所述上盖板的边沿的底面的外侧设有第一凸起部，且在所述第一凸起部上设有超声线；
    所述第一台阶端面的底面与所述第一凸起部对应的位置设有第一凹槽，所述上盖板的第一凸起部插入所述第一凹槽并与所述第一凹槽的底面超声焊接。
  13. 根据权利要求1或2所述的一种发声器，其特征在于，所述壳体的第一端开口，所述壳体的第一端开口的端面的外侧设有第二凹槽，所述振膜固定在所述第一端开口的端面的内侧；
    所述振膜的上方还设有安装在所述壳体上的上盖板，所述上盖板的边沿的底面的外侧设有第二凸起部，所述第二凸起部伸入所述第二凹槽并粘接固定。
  14. 根据权利要求1或2所述的一种发声器，其特征在于，所述壳体为矩形结构。
  15. 根据权利要求1或2所述的一种发声器，其特征在于，所述后声孔上设有透气隔离件，所述后腔中填充有吸音材料。
  16. 根据权利要求15所述的一种发声器，其特征在于，所述壳体底壁或下盖板上开设有用于灌装所述吸音材料的灌装孔，所述灌装孔上封装有盖片。
  17. 根据权利要求16所述的一种发声器，其特征在于，所述盖片上设有允许空气通过且不允许吸音材料通过的透气微孔；或者，
    所述盖片上设有泄漏孔，且在所述泄漏孔上覆盖有允许空气通过且不允许吸音材料通过的阻尼网。
  18. 根据权利要求1或2所述的一种发声器，其特征在于，所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板，所述下盖板为金属制成。
  19. 根据权利要求18所述的一种发声器，其特征在于，所述下盖板为平板状；
    或者，所述下盖板为具有底壁和侧壁的碗状结构。
  20. 根据权利要求1或2所述的一种发声器，其特征在于，
    所述壳体的第二端开口，所述壳体的第二端开口处安装有所述下盖板，所述下盖板通过胶层粘接在所述壳体的第二端开口的端面上；或者
    所述壳体的第二端开口的端面的内侧具有凹陷的第二台阶端面，所述第二台阶端面具有用于安装所述下盖板的顶面和侧面；所述下盖板为平板状，所述下盖板的边缘设有朝向所述后腔方向凹陷的凹陷部，所述凹陷部抵接在所述第二台阶端面的顶面并且与所述第二台阶端面的侧面之间形成第一容胶槽，在所述第一容胶槽内涂胶将所述下盖板固定在所述壳体上；或者，所述下盖板为具有底壁和侧壁的碗状结构，所述下盖板的侧壁的端部向外侧弯折设有安装边缘，所述安装边缘抵接在所述第二台阶端面的顶面并且与所述第二台阶端面的侧面之间形成第二容胶槽，在所述第二容胶槽内涂胶将所述下盖板固定在所述壳体上；或者
    所述下盖板的周边注塑有塑料边缘，所述塑料边缘与所述壳体的所述第二端开口处超声焊接。
  21. 根据权利要求1所述的一种发声器，其特征在于，所述壳体的第一端开口，所述壳体的第二端端部一体设有壳体底壁，所述壳体底壁全部为塑料材质制成；
    或者，所述壳体底壁包括一体注塑的金属片。
PCT/CN2018/123194 2018-01-10 2018-12-24 发声器 Ceased WO2019137191A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/961,463 US11395071B2 (en) 2018-01-10 2018-12-24 Sound generator

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201820043738 2018-01-10
CN201820043738.X 2018-01-10
CN201810146756.5A CN109218929B (zh) 2018-01-10 2018-02-12 发声器
CN201810146756.5 2018-02-12

Publications (1)

Publication Number Publication Date
WO2019137191A1 true WO2019137191A1 (zh) 2019-07-18

Family

ID=63398139

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/123194 Ceased WO2019137191A1 (zh) 2018-01-10 2018-12-24 发声器

Country Status (3)

Country Link
US (1) US11395071B2 (zh)
CN (2) CN109218929B (zh)
WO (1) WO2019137191A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109218929B (zh) * 2018-01-10 2024-04-02 歌尔股份有限公司 发声器
CN110113697B (zh) * 2019-04-08 2021-04-09 Oppo广东移动通信有限公司 电声组件和移动终端
CN212628377U (zh) * 2020-05-29 2021-02-26 瑞声科技(新加坡)有限公司 发声器件
CN212628368U (zh) * 2020-05-29 2021-02-26 瑞声科技(新加坡)有限公司 发声器件
CN113993043B (zh) * 2021-10-22 2024-03-12 歌尔股份有限公司 发声装置和电子设备
WO2024212040A1 (zh) * 2023-04-10 2024-10-17 瑞声光电科技(常州)有限公司 扬声器箱

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102413405A (zh) * 2011-11-16 2012-04-11 瑞声声学科技(深圳)有限公司 磁路系统及使用该磁路系统的发声器件
CN202799131U (zh) * 2012-08-27 2013-03-13 瑞声光电科技(常州)有限公司 微型扬声器
CN203574814U (zh) * 2013-10-23 2014-04-30 瑞声声学科技(常州)有限公司 扬声器箱
CN203747999U (zh) * 2014-01-13 2014-07-30 瑞声光电科技(常州)有限公司 微型发声器
CN106131757A (zh) * 2016-07-20 2016-11-16 瑞声科技(新加坡)有限公司 发声器件及用于发声器件的前腔和后腔的密封方法
CN207835801U (zh) * 2018-01-10 2018-09-07 歌尔股份有限公司 发声器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1365624B1 (en) * 2001-02-26 2008-07-09 Uetax Corporation Speaker
EP2148524B1 (en) * 2008-05-13 2014-10-22 Hosiden Corporation Electroacoustic transducer
US8731223B2 (en) * 2011-12-13 2014-05-20 Bujeon Co., Ltd. Microspeaker with inner resonance chamber
KR101401280B1 (ko) * 2013-04-03 2014-05-29 주식회사 이엠텍 슬림형 측면 방사 인클로져 스피커
US9883280B2 (en) * 2013-08-12 2018-01-30 Sony Corporation Headphone and acoustic characteristic adjusting method
US9654863B2 (en) * 2014-12-08 2017-05-16 Apple Inc. Main logic board with mounted speaker and integrated acoustic cavity
CN204465855U (zh) * 2015-02-13 2015-07-08 瑞声光电科技(常州)有限公司 扬声器
US10349167B2 (en) * 2015-05-18 2019-07-09 Apple Inc. Audio speaker with back volume containing adsorptive material
CN206821001U (zh) * 2017-04-28 2017-12-29 歌尔科技有限公司 扬声器模组以及电子设备
CN206775735U (zh) * 2017-05-26 2017-12-19 歌尔科技有限公司 一种发声器
CN110915234A (zh) * 2017-08-08 2020-03-24 松下知识产权经营株式会社 扬声器以及音响装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102413405A (zh) * 2011-11-16 2012-04-11 瑞声声学科技(深圳)有限公司 磁路系统及使用该磁路系统的发声器件
CN202799131U (zh) * 2012-08-27 2013-03-13 瑞声光电科技(常州)有限公司 微型扬声器
CN203574814U (zh) * 2013-10-23 2014-04-30 瑞声声学科技(常州)有限公司 扬声器箱
CN203747999U (zh) * 2014-01-13 2014-07-30 瑞声光电科技(常州)有限公司 微型发声器
CN106131757A (zh) * 2016-07-20 2016-11-16 瑞声科技(新加坡)有限公司 发声器件及用于发声器件的前腔和后腔的密封方法
CN207835801U (zh) * 2018-01-10 2018-09-07 歌尔股份有限公司 发声器

Also Published As

Publication number Publication date
CN109218929B (zh) 2024-04-02
CN207835801U (zh) 2018-09-07
CN109218929A (zh) 2019-01-15
US20200382875A1 (en) 2020-12-03
US11395071B2 (en) 2022-07-19

Similar Documents

Publication Publication Date Title
WO2019137191A1 (zh) 发声器
WO2019137192A1 (zh) 发声装置
WO2019161704A1 (zh) 发声器
CN211321501U (zh) 扬声器箱
WO2019161703A1 (zh) 发声器及电子产品
CN216960110U (zh) 扬声器箱
WO2019227924A1 (zh) 微型扬声器模组
CN208285531U (zh) 发声器
WO2019205720A1 (zh) 一种发声装置
WO2019000538A1 (zh) 扬声器模组以及电子设备
WO2019000539A1 (zh) 扬声器模组以及电子设备
CN204442667U (zh) 侧出声扬声器模组
CN104541519B (zh) 扩音器和制造扩音器的隔板部分的方法
WO2019205708A1 (zh) 一种发声装置及电子设备
CN112104930A (zh) 扬声器箱
WO2020077776A1 (zh) 发声器模组
WO2019205719A1 (zh) 一种发声装置
CN111163383A (zh) 模组化喇叭
WO2025175696A1 (zh) 发声单体、发声器件及应用装置
WO2021179237A1 (zh) 一种扬声器
CN204598311U (zh) 一种背侧出声的扬声器
CN219981029U (zh) 扬声器箱
CN216291335U (zh) 一种扬声器模组和电子设备
CN219227790U (zh) 一种喇叭和耳机
CN111711892A (zh) 三音腔分路分频喇叭模组

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18900104

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18900104

Country of ref document: EP

Kind code of ref document: A1