CN113993043B - Sound producing device and electronic equipment - Google Patents
Sound producing device and electronic equipment Download PDFInfo
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- CN113993043B CN113993043B CN202111235750.3A CN202111235750A CN113993043B CN 113993043 B CN113993043 B CN 113993043B CN 202111235750 A CN202111235750 A CN 202111235750A CN 113993043 B CN113993043 B CN 113993043B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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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
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a sound generating device and electronic equipment, wherein the sound generating device comprises a shell and a loudspeaker unit, the shell is provided with a containing cavity with one end being open, the loudspeaker unit comprises a shell and a vibrating diaphragm, one end of the shell protrudes out of the opening, the other end of the shell stretches into the containing cavity, the periphery of the vibrating diaphragm is provided with a fixing part and a bending part formed by downwards bending and extending the fixing part, the fixing part is connected with the end part of the shell protruding out of the opening, the bending part is connected with the outer wall of the shell protruding out of the opening and is abutted with the end part, adjacent to the opening, of the shell, so that the bottom of the loudspeaker unit is enclosed with the inner wall of the containing cavity to form a rear sound cavity. The invention aims to provide the sound generating device capable of effectively increasing the volume of the rear acoustic cavity, and the sound generating device is simple in structure and convenient to assemble, and the acoustic performance of the sound generating device is effectively improved.
Description
Technical Field
The present invention relates to electroacoustic conversion technology, and in particular, to a sound generating device and an electronic device using the sound generating device.
Background
Sound emitting devices are important components in electronic products for converting electrical signals into acoustic signals. The trend of electronic products is to make the electronic products thinner and thinner, and in order to realize more functions, more components in the electronic products are more and more, the space reserved for the sound generating device is more and less, and the electronic products pay more attention to the music experience of users, so that the sound generating device is required to have better sound quality.
In the related art, the sound generating device consists of an inner core, a metal upper shell and a metal lower shell, wherein the bottom surface of the inner core and the bottom surface of the metal upper shell are sealed by glue, and the side wall is fixed by laser welding.
Disclosure of Invention
The invention mainly aims to provide a sound generating device and electronic equipment, and aims to provide the sound generating device capable of effectively increasing the volume of a rear sound cavity.
To achieve the above object, the present invention provides a sound emitting device including:
the shell is provided with a containing cavity with one end open; and
the loudspeaker comprises a loudspeaker body, wherein the loudspeaker body comprises a shell and a vibrating diaphragm, one end of the shell protrudes out of the opening, the other end of the shell stretches into the accommodating cavity, a fixing part and a bending part formed by downwards bending and extending the fixing part are arranged on the periphery of the vibrating diaphragm, the fixing part is connected with the end part of the shell protruding out of one end of the opening, the bending part is connected with the outer wall of the opening protruding out of the shell and is abutted to the end part of the shell adjacent to the opening, and the bottom of the loudspeaker body and the inner wall of the accommodating cavity enclose to form a rear acoustic cavity.
In an embodiment, the bending part is connected with the outer wall of the shell in an adhesive way;
and/or the bending part is connected with the end part of the shell adjacent to the opening in an adhesive way.
In one embodiment, the outer wall of one end of the outer shell extending into the containing cavity is welded with the inner wall of the containing cavity;
or, the outer wall of one end of the shell extending into the cavity is connected with the inner wall of the cavity in an adhesive manner.
In an embodiment, a positioning table is convexly arranged on the inner wall of the shell, and the bottom of the speaker unit is in limiting abutting connection with the positioning table.
In an embodiment, the positioning table extends along the circumference of the inner wall of the accommodating cavity;
or, the positioning tables comprise a plurality of positioning tables which are arranged at intervals along the circumferential direction of the inner wall of the cavity.
In an embodiment, the positioning table is formed by bending the outer wall of the shell towards the concave part in the accommodating cavity so that the inner wall of the shell is convex;
or, the positioning table and the shell are integrated into a whole.
In an embodiment, the speaker unit further includes:
the magnetic circuit system is connected to one end of the shell extending into the cavity and is arranged opposite to the vibrating diaphragm, a magnetic gap is formed in one side of the magnetic circuit system facing the vibrating diaphragm, the periphery of the magnetic circuit system is connected with the inner wall of the cavity in a sealing way, and one side of the magnetic circuit system facing away from the vibrating diaphragm and the inner wall of the cavity are enclosed to form the rear sound cavity; and
the vibration system comprises a voice coil, one end of the voice coil is connected with the vibrating diaphragm, and the other end of the voice coil is suspended in the magnetic gap.
In one embodiment, the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit part and a side magnetic circuit part, wherein the central magnetic circuit part and the side magnetic circuit part are arranged on the magnetic yoke, and the magnetic gap is formed between the central magnetic circuit part and the side magnetic circuit part;
the central magnetic circuit part comprises a central magnet and a central magnetic conduction plate arranged on the central magnet, the magnetic circuit system is provided with a through hole penetrating through the magnetic yoke and the central magnet, and the through hole is communicated with the rear acoustic cavity.
In one embodiment, the side magnetic circuit part comprises a side magnet and a side magnetic conduction plate arranged on the side magnet, and the side magnetic conduction plate and the shell are of an integrated structure;
and/or the periphery of the side magnetic circuit part is connected with the inner wall of the containing cavity in an adhesive way;
and/or the periphery of the magnetic yoke is connected with the inner wall of the containing cavity in an adhesive way;
and/or, the sound generating device further comprises a conductive piece, the conductive piece comprises a centering support piece and a flexible circuit board which are integrally connected, the centering support piece is clamped between the shell and the magnetic yoke and is connected with the voice coil, the shell is provided with a through hole, and one end of the flexible circuit board, which is far away from the centering support piece, extends out of the accommodating cavity through the through hole and seals the through hole through sealant;
and/or, the bottom wall of the accommodating cavity is provided with a filling hole for filling the sound absorbing material, and the sound generating device further comprises a damping piece, and the damping piece is packaged in the filling hole.
The invention also provides electronic equipment, which comprises an equipment shell and the sounding device, wherein the sounding device is arranged on the equipment shell.
According to the sound production device, the shell is arranged to be of the containing cavity structure with one end open, so that the loudspeaker unit is arranged at the opening of the containing cavity of the shell, and part of the loudspeaker unit is exposed out of the opening, so that only part of the loudspeaker unit is positioned in the containing cavity, and the volume of a rear sound cavity formed by encircling the bottom of the loudspeaker unit and the inner wall of the containing cavity can be effectively increased; meanwhile, the fixing part and the bending part are arranged on the periphery of the vibrating diaphragm, so that the fixing part is connected with the end part of the shell protruding out of the opening, the bending part is connected with the outer wall of the shell protruding out of the opening and is abutted against the end part of the shell adjacent to the opening, and therefore the positioning and supporting effects of the bending part on the installation of the loudspeaker unit are realized, the volume of a rear sound cavity is ensured, and the vibrating diaphragm exposed out of the opening of the shell is enclosed with the equipment shell to form a front sound cavity; furthermore, the sound generating device only utilizes one shell to realize the installation of the loudspeaker single body, so that the structure of the sound generating device is simplified, the assembly is more convenient, the performance testing steps of the sound generating device are effectively saved, and the acoustic performance of the sound generating device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a sound generating apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a sound generating apparatus according to another embodiment of the present invention;
FIG. 3 is a schematic diagram showing a structure of a case separated from a speaker unit according to an embodiment of the present invention;
FIG. 4 is a partially exploded view of a sound emitting device according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a sound generating device according to an embodiment of the invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Sound emitting devices are important components in electronic products for converting electrical signals into acoustic signals. The trend of electronic products is to make the electronic products thinner and thinner, and in order to realize more functions, more components in the electronic products are more and more, the space reserved for the sound generating device is more and less, and the electronic products pay more attention to the music experience of users, so that the sound generating device is required to have better sound quality.
In the related art, the sound generating device comprises an inner core, a metal upper shell and a metal lower shell, wherein the bottom surface of the inner core and the bottom surface of the metal upper shell are sealed by glue, and the side wall is fixed by selecting laser welding, so that the technical process is complex, the shape of a rear cavity of the sound generating device is irregular, the air flow entering the rear cavity is not stable enough, the problems of polarization, distortion and the like are easily caused, the acoustic effect is not ideal enough, and if the volume of the sound generating device is reduced, the volume of the rear cavity of the sound generating device is reduced, and the acoustic performance of the sound generating device is influenced.
Based on the above-mentioned conception and problems, the present invention provides a sound generating apparatus 100, it can be appreciated that the sound generating apparatus 100 is applied to an electronic device, and the electronic device may be a mobile phone, a sound device, a computer, an earphone, a watch, a television, or the like, which is not limited herein.
Referring to fig. 1 to 5, in the embodiment of the invention, the sound generating device 100 includes a housing 1 and a speaker unit 2, wherein the housing 1 has a cavity 11 with an opening 12 at one end, the speaker unit 2 includes a housing 21 and a diaphragm 221, one end of the housing 21 protrudes out of the opening 12, the other end of the housing 21 extends into the cavity, a fixing portion 2211 and a bending portion 2212 formed by bending and extending the fixing portion 2211 downwards are disposed at the periphery of the diaphragm 221, the fixing portion 2211 is connected with an end of the housing 21 protruding out of the opening 12, the bending portion 2212 is connected with an outer wall of the housing 21 protruding out of the opening 12 and abuts against an end of the housing 1 adjacent to the opening, so that the bottom of the speaker unit 2 and an inner wall of the cavity 11 enclose to form a rear acoustic cavity 3.
In the present embodiment, the housing 1 of the sound generating apparatus 100 is used for mounting, fixing and protecting the speaker unit 2, that is, the housing 1 provides a mounting base for the speaker unit 2. It will be appreciated that the housing 1 may be of unitary or split construction, for example the housing 1 may be of an open-ended or open-ended construction. Alternatively, the casing 1 may have an open structure at one end, and in this case, the casing 1 may have an open structure at one end, and the other end may be a closed end, and the speaker unit 2 is assembled from the open end.
It can be appreciated that the shell 1 has a bottom wall and a side wall arranged on the periphery of the bottom wall, the side wall and the bottom wall enclose to form a cavity 11 with an opening 12 at one end, when the speaker unit 2 is installed from the opening 12, only a part of the speaker unit 2 is arranged in the cavity 11, so that a part of the speaker unit 2 protrudes from the opening 12, and in this way, under the condition that the size of the shell 1 is fixed, compared with the traditional sound generating device 100, the volume of the rear sound cavity 3 formed by enclosing the bottom of the speaker unit 2 and the inner wall of the cavity 11 is effectively increased, thereby improving the acoustic performance of the sound generating device 100.
In this embodiment, as shown in fig. 3 to 5, the speaker unit 2 includes a housing 21, and a vibration system 22 and a magnetic circuit system 23 disposed on the housing 21, the vibration system 22 includes a diaphragm 221, the diaphragm 221 of the vibration system 22 is disposed at one end of the housing 21 protruding from the opening 12, and the magnetic circuit system 23 is connected to one end of the housing 21 extending into the cavity 11 and opposite to the diaphragm 221. Through being provided with fixed part 2211 and by fixed part 2211 bending type extension's kink 2212 down at the periphery of vibrating diaphragm 221 for vibrating diaphragm 221 passes through fixed part 2211 and the end connection of shell 21 protrusion opening 12 one end, and kink 2212 and shell 21 protrusion opening 12's outer wall connection, and with the adjacent open-ended end butt of casing 1, so both can improve the connection stability of vibrating diaphragm 221 and shell 21, still be favorable to increasing the effective vibrating area of vibrating diaphragm 221 simultaneously, still can utilize kink 2212 and the casing 1 of vibrating diaphragm 221 to realize the location installation simultaneously, and play support speaker monomer 2, ensure the volume of the back acoustic cavity 3 that speaker monomer 2 bottom encloses with the inner wall of holding chamber 11 and form.
The current is introduced into the magnetic field generated by the magnetic circuit system 23 through the vibration system 22, and the electric signal is converted into mechanical energy under the action of the magnetic field, so that the vibrating diaphragm 221 of the vibration system 22 vibrates, and the vibration system 22 realizes vibration sounding.
It will be appreciated that the speaker unit 2 is also sealingly connected to the inner wall of the cavity 11 adjacent to the opening 12 by means of an outer wall of a portion of the housing 21, thereby achieving a further mounting and securing of the speaker unit 2. The outer wall of the part of the shell 21 is in sealing connection with the inner wall of the containing cavity 11 adjacent to the opening, so that the sealing effect of the rear sound cavity 3 is effectively improved, and meanwhile, one end of the loudspeaker unit 2 provided with the vibrating diaphragm 221 is exposed out of the opening 12 of the shell 1, so that when the sound generating device 100 is arranged in the equipment shell, the part of the loudspeaker unit 2 exposed out of the opening 12 of the shell 1 is enclosed with the equipment shell to form a front sound cavity.
According to the sound production device 100, the shell 1 is provided with the containing cavity 11 structure with the opening 12 at one end, so that the loudspeaker unit 2 is arranged at the opening 12 of the containing cavity 11 of the shell 1, and part of the loudspeaker unit 2 is exposed out of the opening 12, so that only part of the loudspeaker unit 2 is positioned in the containing cavity 11, and the volume of the rear sound cavity 3 formed by the surrounding of the bottom of the loudspeaker unit 2 and the inner wall of the containing cavity 11 can be effectively increased; meanwhile, by arranging the fixing part 2211 and the bending part 2212 at the periphery of the vibrating diaphragm 221, the fixing part 2211 is connected with the end part of the shell 21 protruding out of the opening 12, the bending part 2212 is connected with the outer wall of the shell 21 protruding out of the opening 12 and is abutted against the end part of the shell 1 adjacent to the opening 12, so that the positioning and supporting effects are realized by using the bending part 2212 to mount the loudspeaker unit 2, the volume of the rear sound cavity 3 is ensured, and the vibrating diaphragm 221 exposed out of the opening 12 of the shell 1 and the equipment shell are enclosed to form a front sound cavity; further, the sound generating device 100 only utilizes one shell 1 to realize the installation of the speaker unit 2, so that the structure of the sound generating device 100 is simplified, the assembly is more convenient, the performance testing steps of the sound generating device 100 are effectively saved, and the acoustic performance of the sound generating device 100 is improved.
In an embodiment, the bending portion 2212 is adhesively connected to the outer wall of the housing 21, that is, the bending portion 2212 is adhesively connected to the outer wall of the opening 12 of the housing 21 by glue or glue, so as to not only improve the mounting stability of the diaphragm 221, but also improve the sealing performance.
In one embodiment, the bend 2212 is adhesively attached to the end of the housing 1 adjacent the opening. It can be appreciated that, so set up, on the one hand can further improve the connection stability of speaker monomer 2 and casing 1, still be favorable to improving the sealing performance between speaker monomer 2 and the casing 1 simultaneously, further ensure the sealed effect of back sound cavity 3.
In an embodiment, the outer wall of the end of the housing 21 extending into the accommodating cavity 11 is welded with the inner wall of the accommodating cavity 11, that is, the connection between the housing 21 and the side wall of the housing 1 is realized by a laser welding mode, so that the installation stability of the speaker unit 2 is improved.
For convenience of positioning and welding, the side wall of the housing 1 is provided with a welding mark line corresponding to the housing 21, that is, by arranging the welding mark line on the side wall of the housing 1, after the speaker unit 2 is assembled in place, the housing 21 corresponds to the welding mark line, and connection between the housing 21 and the side wall is realized by a laser welding manner, which is not limited herein.
In another embodiment, the outer wall of the end of the housing 21 extending into the accommodating cavity 11 is adhesively connected with the inner wall of the accommodating cavity 11, that is, the connection between the housing 21 and the side wall of the housing 1 is realized in an adhesive manner, so that the installation stability of the speaker unit 2 is improved.
In an embodiment, the inner wall of the housing 1 is convexly provided with a positioning table 13, and the bottom of the speaker unit 2 is in limiting abutting connection with the positioning table 13.
In this embodiment, as shown in fig. 5, by disposing the positioning table 13 on the inner wall of the cavity 11, the positioning table 13 is used to position the assembly of the speaker unit 2 on one hand, and on the other hand, the positioning table 13 also plays a supporting role on the speaker unit 2, so as to ensure that after the speaker unit 2 is assembled, the volume of the rear sound cavity 3 is ensured, and the situation that the speaker unit 2 falls into the rear sound cavity 3 during the fading process of the sound generating device 100 does not occur.
In an embodiment, the positioning table 13 extends along the circumference of the inner wall of the accommodating cavity 11, so that the bottom periphery of the speaker unit 2 is ensured to be in spacing abutment with the positioning table 13, and the installation stability is further improved. It will be appreciated that the positioning table 13 is provided as an annular boss, which is not limited herein.
In another embodiment, the positioning tables 13 include a plurality of positioning tables 13 arranged at intervals along the circumference of the inner wall of the cavity 11, where a gap exists between two adjacent positioning tables 13, and the plurality of positioning tables 13 are arranged at intervals along the circumference of the inner wall of the cavity 11 to form an annular structure, which is not limited herein.
In an embodiment, the positioning table 13 is formed by concavely bending the outer wall of the housing 1 toward the inner side of the cavity 11, so that the inner wall of the housing 1 is formed by protruding. It can be appreciated that the positioning table 13 can be directly formed by bending or injection molding during the processing of the housing 1, so as to improve the structural strength of the positioning table 13.
Of course, the positioning table 13 is integrally formed with the housing 1. It can be understood that the positioning table 13 may be a boss structure integrally formed on the inner wall of the housing 1 by injection molding; alternatively, the positioning table 13 is welded to the inner wall of the housing 1 by welding, which is not limited herein.
In an embodiment, the speaker unit 2 further includes a magnetic circuit 23 and a vibration system 22, where the magnetic circuit 23 is connected to one end of the housing 21 extending into the cavity 11 and is disposed opposite to the diaphragm 221, a magnetic gap 234 is disposed on a side of the magnetic circuit 23 facing the diaphragm 221, and a periphery of the magnetic circuit 23 is hermetically connected to an inner wall of the cavity 11, so that a side of the magnetic circuit 23 facing away from the diaphragm 221 encloses the inner wall of the cavity 11 to form a rear acoustic cavity 3, the vibration system 22 includes a voice coil 222, one end of the voice coil 222 is connected to the diaphragm 221, and the other end of the voice coil 222 is suspended in the magnetic gap 234.
In this embodiment, as shown in fig. 3 to 5, the housing 21 of the speaker unit 2 is used for mounting and fixing the vibration system 22 and the magnetic circuit system 23, that is, the housing 21 provides a mounting base for the vibration system 22 and the magnetic circuit system 23, the housing 21 may be a frame structure or a cylindrical structure, and the vibration system 22 and the magnetic circuit system 23 are disposed opposite to each other and connected to opposite sides of the housing 21.
It can be appreciated that the sealing connection is realized by gluing the periphery of the magnetic circuit system 23 and the inner wall of the accommodating cavity 11, so that the sealing effect of the rear acoustic cavity 3 is effectively improved. In the present embodiment, the periphery of the magnetic circuit system 23 may be attached to the inner wall of the cavity 11, which is not limited herein.
In the present embodiment, one end of the voice coil 222 of the vibration system 22 is connected to the diaphragm 221, and the other end of the voice coil 222 is suspended in the magnetic gap 234. The diaphragm 221 further includes a central portion and a ring portion disposed around the central portion, the ring portion is connected between the central portion and the fixing portion 2211, the bending portion 2212 is located on the housing of the fixing portion 2211, and the voice coil 222 is connected to the central portion of the diaphragm 221. Alternatively, the ring folding portion is a downward concave structure or an upward convex structure, which is not limited herein. It can be appreciated that the current is introduced into the magnetic gap 234 of the magnetic circuit system 23 through the voice coil 222, and the voice coil 222 drives the diaphragm 221 to vibrate under the magnetic field formed by the magnetic circuit system 23, so as to realize sounding.
In one embodiment, the magnetic circuit system 23 includes a magnetic yoke 231 and a center magnetic circuit portion 232 and a side magnetic circuit portion 233 provided to the magnetic yoke 231, and a magnetic gap 234 is formed between the center magnetic circuit portion 232 and the side magnetic circuit portion 233; the central magnetic circuit portion 232 includes a central magnet 2321 and a central magnetically permeable plate 2322 provided to the central magnet 2321, and the magnetic circuit system 23 is provided with a through hole 235 penetrating the magnetic yoke 231 and the central magnet 2321, the through hole 235 communicating with the rear acoustic cavity 3.
In the present embodiment, as shown in fig. 4 and 5, the center magnetic circuit portion 232 and the side magnetic circuit portion 233 constitute a magnetic circuit portion, and at least one of the center magnetic circuit portion 232 and the side magnetic circuit portion 233 is provided with a permanent magnet. Specifically, the central magnetic circuit portion 232 includes a central magnet 2321 and a central magnetic conductive plate 2322, and the side magnetic circuit portion 233 includes a side magnet 2331 and a side magnetic conductive plate 2332 provided to the side magnet 2331.
It will be appreciated that, to further simplify the processing technology, the side magnetic plate 2332 and the housing 21 are integrally formed, that is, the side magnetic plate 2332 of the side magnetic circuit portion 233 may be integrally formed with the housing 21, and the housing 21 may be made of a plastic material or a metal material. Optionally, the casing 21 is made of metal, so that the speaker unit 2 can dissipate heat rapidly through the side magnetic plate 2332 and the casing 21, and the heat dissipation effect is improved.
Alternatively, the periphery of the side magnetic circuit portion 233 is adhesively connected to the inner wall of the housing 11, i.e., the side magnet 2331 of the side magnetic circuit portion 233 is adhesively connected to the inner wall of the housing 11. Of course, in other embodiments, the side magnet 2331 of the side magnetic circuit portion 233 is attached to the inner wall of the housing 11.
In this embodiment, the periphery of the magnetic yoke 231 is adhesively connected to the inner wall of the housing 11. Of course, the periphery of the magnetic yoke 231 is attached to the inner wall of the housing 11. It can be appreciated that the side of the magnetic yoke 231 facing away from the magnetic circuit portion is in limited abutment with the positioning table 13. In order to further increase the volume of the rear acoustic cavity 3, a positioning groove is formed in the periphery of the magnetic yoke 231 corresponding to the positioning table 13, so that when the magnetic yoke 231 is in limiting abutment with the positioning table 13, the positioning table 13 is accommodated and limited in the positioning groove, and the positioning table 13 is arranged flush with the bottom of the magnetic yoke 231, which is not limited herein.
In this embodiment, through the through hole 235 penetrating the magnetic yoke 231 and the center magnet 2321, the through hole 235 is communicated with the rear acoustic cavity 3, so that the through hole 235 not only can play a role of expanding the rear acoustic cavity 3, but also can solve the problem that the stability of the vibration system 22 is poor because the distance between the vibration system 22 and the magnetic circuit of the miniaturized device is small, and the acoustic resistance of vibration is increased.
It should be noted that, the contribution of the central area of the central magnet 2321 to the BL (a parameter measuring the strength of the driving system in the speaker unit 2) of the speaker unit 2 is smaller than that of the boundary area, so that, under the condition that the volume of the rear acoustic cavity 3 is limited, the central area of the central magnet 2321 is hollowed out to increase the volume of the rear acoustic cavity 3, which is helpful to improve the performance of the product. Although the hollowed-out region of the center magnet 2321 has little influence on the BL value of the magnetic circuit system 23, there is still much influence. If the hollowed-out area of the center magnet 2321 is too large, its influence on the BL value of the magnetic circuit system 23 cannot be ignored. The larger the hollowed-out area is, the smaller the BL value of the magnetic circuit system 23 is, and the lower the performance of the product is. Therefore, it is necessary to find a balance range such that the increased volume of the rear acoustic cavity 3 hollowed out by the center magnet 2321 is larger than the BL value of the magnetic circuit system 23 by an amount that decreases the product performance, thereby realizing the optimization of the product performance.
Simulation shows that when the hollowed volume of the central magnet 2321 is within 35% of the original volume of the central magnet 2321, the product performance is improved. When the hollowed-out volume of the center magnet 2321 exceeds this range, the BL value of the magnetic circuit system 23 drastically decreases. At this time, the improvement effect of the increase of the space of the rear acoustic cavity 3 on the performance is not as good as the product performance reduction effect caused by the reduction of the BL value of the magnetic circuit system 23, and the comprehensive performance is reduced. Therefore, the open pore volume of the center magnet 2321 should satisfy: the ratio of the open pore volume of the center magnet 2321 to the volume of the center magnet 2321 before the opening is 35% or less, and further, may be controlled within a range of 5% to 30%.
In an embodiment, the sound generating device 100 further includes a conductive member 4, where the conductive member 4 includes a centering support 41 and a flexible circuit board 42 that are integrally connected, the centering support 41 is sandwiched between the housing 21 and the magnetic yoke 231 and is connected to the voice coil 222, the housing 1 is provided with a via hole 15, and one end of the flexible circuit board 42, which is far away from the centering support 41, extends out of the cavity 11 through the via hole 15, and seals the via hole 15 by sealant.
In this embodiment, as shown in fig. 1 to 5, by providing the centering support 41 and the flexible circuit board 42 as an integral structure, the volume of the housing 1 of the sound generating apparatus 100 is effectively reduced, that is, the housing 1 does not need to reserve an installation space for a portion of the flexible circuit board 42 extending into the accommodating cavity 11.
It can be appreciated that the centering support 41 includes an outer fixing portion and an elastic portion disposed inside the outer fixing portion, the outer fixing portion of the centering support 41 is connected with one end of the flexible circuit board 42, the outer fixing portion of the centering support 41 is clamped between the magnetic circuit 23 and the housing 21, the elastic portion of the centering support 41 extends into the magnetic gap 234 and is connected with the voice coil 222, and thus the voice coil 222 is connected with an external power supply through the centering support 41 and the flexible circuit board 42, and the centering support 41 can be utilized to avoid polarization of the voice coil 222 during vibration, so that acoustic performance is improved.
In this embodiment, the magnetic yoke 231 is provided with a back sound hole corresponding to the elastic portion of the centering support 41, and the back sound hole is communicated with the magnetic gap 234, that is, the elastic portion of the centering support 41 is opposite to the back sound hole on the magnetic yoke 231, so that the back sound hole is utilized to avoid the vibration of the elastic portion of the centering support 41.
It will be appreciated that the resilient portion of the centering pad 41 has an inner pad such that the centering pad 41 is electrically connected to the voice coil 222 of the speaker unit 2 through the inner pad. The flexible circuit board 42 is further provided with an external bonding pad, and the external bonding pad is positioned at one end of the flexible circuit board 42 extending out of the accommodating cavity 11, so that the flexible circuit board 42 is connected with an external power supply through the external bonding pad.
In an embodiment, the bottom wall of the cavity 11 is provided with a filling hole 14 for filling the sound absorbing material, and the sound generating device 100 further includes a damping member 5, where the damping member 5 is encapsulated in the filling hole 14.
In this embodiment, as shown in fig. 2 and 5, a bottom wall is disposed at one end of the housing 1 away from the opening 12, and at this time, the housing 1 is in an integrally formed structure, i.e. the side wall and the bottom wall enclose a cavity 11. Optionally, the bottom wall is made of plastic material; alternatively, the bottom wall comprises an integrally injection molded metal sheet.
In another embodiment, the end of the housing 1 remote from the opening 12 is provided with an opening or a through hole, and the housing 1 further comprises a lower cover plate mounted to the opening or the through hole. It can be appreciated that the lower cover plate can be made of a metal material, and the metal material can be made thinner, so that the occupied space is smaller. The lower cover plate can be flat plate-shaped; or lower apron is for having the bowl dress structure of diapire and lateral wall, and lower apron is metal material and be among bowl structural's the embodiment, and bowl structural's metal lower apron has higher intensity, and occupation space is little to the existence of lateral wall has formed the back sound cavity 3 of part, consequently the highly can reduce of casing 1, avoids too high plastics casing to need make the wall thickness big and guarantees overall structure intensity, and then can increase occupation space's problem, more is favorable to realizing the product miniaturization.
In this embodiment, the lower cover plate is adhered to the end face of the housing 1 far from the opening 12 through an adhesive layer, that is, the edge of the lower cover plate extends to be flush with the outer wall surface of the side wall of the housing 1, and the surface of the lower cover plate opposite to the end face of the housing 1 far from the opening 12 is provided with a back adhesive. The lower cover plate is adhered to the end surface of the shell 1 far away from the opening 12 through the self-carried back adhesive so as to seal the rear acoustic cavity 3. Of course, in other embodiments, the periphery of the lower cover plate is injection molded with a plastic rim that is ultrasonically welded to the end of the housing 1 remote from the opening 12.
It will be appreciated that the sound absorbing material is filled into the sound cavity 3 by means of the filling holes 14 by providing the filling holes 14 in the bottom wall or the lower cover plate. By arranging the damping piece 5, the filling hole 14 is plugged by the damping piece 5, and leakage of sound absorbing particles is avoided. Alternatively, the damping member 5 is made of PET.
In this embodiment, the damping member 5 may be a rigid sheet that is directly impermeable to air, and only functions as a blocking sound absorbing material. In another embodiment, the damping member 5 may further be provided with ventilation micro-holes that allow air to pass through and do not allow sound absorbing material to pass through; alternatively, the damper 5 is further provided with a leakage hole, and the leakage hole is covered with a damping net that allows air to pass through and does not allow sound absorbing material to pass through. So that the filling hole 14 serves as a rear cavity leakage hole and can be used for balancing the air pressure inside and outside the sound generating device 100. Further, the size of the sound resistance can be adjusted by adjusting the size of the ventilation micro holes or the mesh size of the damping net.
In an embodiment, the bottom wall or the lower cover plate is provided with a damping hole communicated with the rear acoustic cavity 3, and the acoustic device 100 further includes a damping member, where the damping member covers the damping hole. It can be understood that by arranging the damping hole and arranging the damping piece at the damping hole, the air leakage or ventilation effect of the damping hole on the filling cavity is realized.
The sound generating device 100 of the invention only needs one shell, namely only needs one lower shell structure, the magnetic circuit system 23 of the speaker unit 2 is firstly arranged in the containing cavity 11 from the opening 12 of the containing cavity 11, so that after the bottom of the magnetic conduction yoke 231 of the magnetic circuit system 23 is positioned and abutted with the positioning table 13, the shell 21 provided with the vibration system 22 is assembled with the magnetic circuit system 23 arranged in the containing cavity 11, and the assembly of the sound generating device 100 is completed, thereby not only effectively simplifying the structure of the sound generating device 100, but also improving the assembly efficiency, simultaneously saving the hearing process of the speaker unit 2, and avoiding the damage of the speaker unit 2 and the scrapping of the speaker unit 2 caused by the fact that the hearing process is carried out once after the assembly of the sound generating device 100 is completed.
The invention also provides electronic equipment, which comprises an equipment shell and the sounding device 100, wherein the sounding device 100 is arranged on the equipment shell. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and because the electronic device adopts all the technical solutions of all the foregoing embodiments, the sound generating device at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which are not described in detail herein. In this embodiment, the electronic device further includes a device housing, and the sound generating apparatus 100 is connected to the device housing.
In this embodiment, a cavity is provided in the device housing, and the sound generating apparatus 100 is provided in the cavity. It is understood that the electronic device may be a mobile phone, an audio device, a computer, an earphone, a watch, a television or a tablet computer, etc., and is not limited herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. A sound emitting device, the sound emitting device comprising:
the shell is provided with a containing cavity with one end open; and
the loudspeaker comprises a loudspeaker body, wherein the loudspeaker body comprises a shell and a vibrating diaphragm, one end of the shell protrudes out of the opening, the other end of the shell stretches into the accommodating cavity, a fixing part and a bending part formed by downwards bending and extending the fixing part are arranged on the periphery of the vibrating diaphragm, the fixing part is connected with the end part of the shell protruding out of one end of the opening, the bending part is connected with the outer wall of the opening protruding out of the shell and is abutted to the end part of the shell adjacent to the opening, and the bottom of the loudspeaker body and the inner wall of the accommodating cavity enclose to form a rear acoustic cavity.
2. The sound generating apparatus of claim 1, wherein the bend is adhesively attached to the outer wall of the housing;
and/or the bending part is connected with the end part of the shell adjacent to the opening in an adhesive way.
3. The sound generating apparatus according to claim 1, wherein an outer wall of an end of the housing extending into the cavity is welded to an inner wall of the cavity;
or, the outer wall of one end of the shell extending into the cavity is connected with the inner wall of the cavity in an adhesive manner.
4. The sound generating apparatus according to claim 1, wherein a positioning table is protruding from an inner wall of the housing, and a bottom of the speaker unit is in limited abutment with the positioning table.
5. The sound-producing device of claim 4, wherein the positioning table extends along a circumference of the inner wall of the cavity;
or, the positioning tables comprise a plurality of positioning tables which are arranged at intervals along the circumferential direction of the inner wall of the cavity.
6. The sound generating apparatus according to claim 4, wherein the positioning table is formed by concavely bending an outer wall of the housing toward the inside of the cavity so that an inner wall of the housing is formed to be convex;
or, the positioning table and the shell are integrated into a whole.
7. The sound emitting apparatus of any one of claims 1-6, wherein the speaker unit further comprises:
the magnetic circuit system is connected to one end of the shell extending into the cavity and is arranged opposite to the vibrating diaphragm, a magnetic gap is formed in one side of the magnetic circuit system facing the vibrating diaphragm, the periphery of the magnetic circuit system is connected with the inner wall of the cavity in a sealing way, and one side of the magnetic circuit system facing away from the vibrating diaphragm and the inner wall of the cavity are enclosed to form the rear sound cavity; and
the vibration system comprises a voice coil, one end of the voice coil is connected with the vibrating diaphragm, and the other end of the voice coil is suspended in the magnetic gap.
8. The sound generating apparatus according to claim 7, wherein the magnetic circuit system includes a magnetic yoke, and a center magnetic circuit portion and a side magnetic circuit portion provided to the magnetic yoke, the magnetic gap being formed between the center magnetic circuit portion and the side magnetic circuit portion;
the central magnetic circuit part comprises a central magnet and a central magnetic conduction plate arranged on the central magnet, the magnetic circuit system is provided with a through hole penetrating through the magnetic yoke and the central magnet, and the through hole is communicated with the rear acoustic cavity.
9. The sound generating apparatus according to claim 8, wherein the side magnetic circuit portion includes a side magnet and a side magnetically permeable plate provided to the side magnet, the side magnetically permeable plate being of an integrally formed structure with the housing;
and/or the periphery of the side magnetic circuit part is connected with the inner wall of the containing cavity in an adhesive way;
and/or the periphery of the magnetic yoke is connected with the inner wall of the containing cavity in an adhesive way;
and/or, the sound generating device further comprises a conductive piece, the conductive piece comprises a centering support piece and a flexible circuit board which are integrally connected, the centering support piece is clamped between the shell and the magnetic yoke and is connected with the voice coil, the shell is provided with a through hole, and one end of the flexible circuit board, which is far away from the centering support piece, extends out of the accommodating cavity through the through hole and seals the through hole through sealant;
and/or, the bottom wall of the accommodating cavity is provided with a filling hole for filling the sound absorbing material, and the sound generating device further comprises a damping piece, and the damping piece is packaged in the filling hole.
10. An electronic device comprising a device housing and a sound emitting apparatus according to any one of claims 1 to 9, the sound emitting apparatus being provided to the device housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235750.3A CN113993043B (en) | 2021-10-22 | 2021-10-22 | Sound producing device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111235750.3A CN113993043B (en) | 2021-10-22 | 2021-10-22 | Sound producing device and electronic equipment |
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| CN113993043A CN113993043A (en) | 2022-01-28 |
| CN113993043B true CN113993043B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111235750.3A Active CN113993043B (en) | 2021-10-22 | 2021-10-22 | Sound producing device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114866924B (en) * | 2022-05-07 | 2024-07-30 | 歌尔股份有限公司 | Sound generating device and electronic terminal |
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| CN109218929A (en) * | 2018-01-10 | 2019-01-15 | 歌尔股份有限公司 | Acoustical generator |
| CN112073849A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN112104930A (en) * | 2020-08-27 | 2020-12-18 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN212628368U (en) * | 2020-05-29 | 2021-02-26 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN212696205U (en) * | 2020-08-31 | 2021-03-12 | 歌尔股份有限公司 | Speaker monomer and electronic terminal |
| CN213028515U (en) * | 2020-05-29 | 2021-04-20 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN213186542U (en) * | 2020-10-30 | 2021-05-11 | 歌尔股份有限公司 | Speaker module and electronic equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218927B (en) * | 2018-01-10 | 2021-12-28 | 歌尔股份有限公司 | Sound producing device |
| CN110198509B (en) * | 2018-02-26 | 2022-04-12 | 歌尔股份有限公司 | Acoustic generator and electronic product |
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- 2021-10-22 CN CN202111235750.3A patent/CN113993043B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109218929A (en) * | 2018-01-10 | 2019-01-15 | 歌尔股份有限公司 | Acoustical generator |
| CN212628368U (en) * | 2020-05-29 | 2021-02-26 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN213028515U (en) * | 2020-05-29 | 2021-04-20 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN112073849A (en) * | 2020-08-27 | 2020-12-11 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN112104930A (en) * | 2020-08-27 | 2020-12-18 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker box |
| CN212696205U (en) * | 2020-08-31 | 2021-03-12 | 歌尔股份有限公司 | Speaker monomer and electronic terminal |
| CN213186542U (en) * | 2020-10-30 | 2021-05-11 | 歌尔股份有限公司 | Speaker module and electronic equipment |
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| CN113993043A (en) | 2022-01-28 |
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