CN217240921U

CN217240921U - Sound production module and electronic device

Info

Publication number: CN217240921U
Application number: CN202123451074.1U
Authority: CN
Inventors: 张锋; 赵国栋
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-19
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a sound production module and electron device, sound production module includes: a sounding monomer; the casing, the casing is including preceding shell and the backshell of mutually supporting, the free installation cavity of installation sound production is injectd to preceding shell and backshell, wherein, preceding shell includes first metal portion and first plastic portion, first plastic portion includes supporting part and sound guide, the supporting part is used for supporting the sound production monomer, the at least part of sound guide is located the installation cavity and just sound guide and installation cavity intercommunication, first metal portion includes just to the front shroud who sets up with the backshell and by the side wall board that the front shroud buckled towards the backshell and extends, the backshell includes just to the second metal portion that sets up and the second plastic portion of moulding plastics with second metal portion an organic whole with the front shroud, second plastic portion is located the periphery and the side wall board sealing fit of second metal portion. The utility model discloses the acoustic performance has been optimized to do benefit to and realize product subminiaturization and ultra-thin design, have waterproof function simultaneously, improve water-proof effects, guarantee the normal use of sound production module.

Description

Sound production module and electronic device

Technical Field

The utility model relates to an electroacoustic technology field, in particular to sound production module and electron device.

Background

A sound module, such as a speaker box, is a transducer for converting an electrical signal into an acoustic signal, and is widely used in electronic devices such as mobile phones, computers, and earphones. At present, the front shell and the rear shell of the loudspeaker box are mostly formed by injection molding, and the thickness of the front shell and the rear shell which are formed by injection molding is larger, so that the volume of a sound cavity can be reduced, and the acoustic performance of the loudspeaker is influenced.

In the correlation technique, for the acoustic cavity volume of increase speaker module, provided an all metal casing's speaker module, speaker module's last epitheca all adopts the metalwork, but above-mentioned structural design processing degree of difficulty is great, has the not good condition of sealed effect moreover to the waterproof performance of speaker product has been reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sound production module and electron device aims at solving among the prior art technical problem such as speaker box acoustic performance is limited and be unfavorable for miniaturization, frivolous design.

In order to achieve the above object, the utility model provides a sounding module, sounding module includes:

a sounding monomer;

the casing, the casing is including the preceding shell and the backshell of mutually supporting, preceding shell and backshell are injectd the installation the free installation cavity of sound production, wherein, preceding shell includes first metal portion and first plastic portion, first plastic portion includes supporting part and sound guide portion, the supporting part is used for supporting the sound production monomer, the at least part of sound guide portion is located the installation cavity is outer just sound guide portion with installation cavity intercommunication, first metal portion include with the backshell is just to the front shroud that sets up and by the front shroud orientation the side wall board that the backshell extends of buckling, the backshell include with the front shroud just to the second metal portion that sets up and with the integrative second plastic portion of moulding plastics of second metal portion, the second plastic position in the periphery of second metal portion just the side wall board seals up the cooperation.

Preferably, welded fastening between side bounding wall and the second metal part, just the side bounding wall with inject first glue spreader between the second plastic part, it has sealed glue to coat in the first glue spreader.

Preferably, second plastic portion orientation one side of front shroud is kept away from the direction of front shroud is sunken to form first installation step, first installation step has first diapire and first lateral wall, the outer fringe of second metal portion is worn to locate second plastic portion and is exposed in first diapire, the side bounding wall is kept away from the one end of front shroud install in first diapire and with second metal portion welded fastening, just the side bounding wall with first lateral wall encloses into first rubber coating groove.

Preferably, the outer fringe of second metal portion forms and wears to locate the flange structure of second plastic part, flange structure includes first turn-ups and second turn-ups, first turn-ups certainly the outer fringe orientation of second metal portion the direction bending type of front shroud becomes, the second turn-ups certainly first turn-ups is along the perpendicular to the direction bending type of first turn-ups becomes, the second turn-ups expose in first diapire and with the side wall board is kept away from the one end welded fastening of front shroud.

Preferably, the side enclosing plate is provided with a third flanging, the third flanging is formed by bending the end, far away from the front cover plate, of the side enclosing plate along the direction perpendicular to the side enclosing plate, the third flanging and the second flanging are arranged in parallel and are welded and fixed, and the third flanging and the first side wall enclose the first glue coating groove.

Preferably, the supporting part is fixed in the front cover plate, a second glue coating groove is defined between the sounding single body and the supporting part, and a sealant is coated in the second glue coating groove.

Preferably, the supporting part orientation one side of backshell is to the sunken support step that forms of direction of front shroud, it has second diapire and second lateral wall to support the step, sound production monomer orientation one side of front shroud support in on the second diapire, just sound production monomer's lateral wall with the second diapire reaches enclose between the second lateral wall second rubber coating groove.

Preferably, the second side wall has a vertical section and an inclined section which are connected with each other, and the vertical section is vertically connected with the second bottom wall; the inclined section extends towards the direction of the rear shell from the vertical section, and inclines towards the direction far away from the sounding monomer.

Preferably, the rear shell is provided with a mounting hole corresponding to the magnetic yoke of the sound generating unit, the magnetic yoke is mounted at the mounting hole and is in sealing fit with the rear shell, and the magnetic yoke is exposed out of the rear shell.

Preferably, the position that the backshell is close to the mounting hole to one side of front shroud is buckled and is formed the fourth turn-ups, the fourth turn-ups enclose into the mounting hole and with the butt joint of yoke outer fringe forms third glue-coated groove, and it has sealed glue to coat in the third glue-coated groove.

Preferably, the first metal part and the first plastic part are integrally injection-molded.

Preferably, the edge of the front cover plate far away from the side enclosing plate forms a fifth flanging which is turned towards the direction of the rear shell, and the fifth flanging is embedded in the first plastic part.

Preferably, the front cover plate is provided with at least two injection molding positioning holes located on the outer side of the first plastic part, and the injection molding positioning holes are covered with plugging pieces.

Preferably, the installation cavity is internally provided with a filling cavity, and the injection molding positioning hole is communicated with the filling cavity so as to fill the filling cavity with sound absorption particles through the injection molding positioning hole.

Preferably, the first plastic part is provided with an opening which is opposite to the vibrating diaphragm of the sounding monomer, a magnetism isolating plate is arranged at the opening, and the magnetism isolating plate seals the opening and is in gluing sealing with the first plastic part.

Preferably, a fourth glue coating groove is defined between the magnetism isolating plate and the first plastic part, and sealant is coated in the fourth glue coating groove.

The utility model discloses still provide an electron device, electron device include the shell and accept in the shell as above the sound production module.

The technical scheme of the utility model, preceding shell is formed by first metal portion and first plastic portion, the first metal portion of preceding shell is owing to be the metalwork, shell before the plastic of more current, but metal portion stamping forming, the processing degree of difficulty has been reduced, and its thickness is less, do not occupy the volume of installation cavity, optimize the acoustic performance of sound production module, and, first metal portion thickness is little then does benefit to the Z axle height that reduces whole sound production module, and then do benefit to and reduce complete machine Z axle height, realize the product miniaturization, the frivolous design, the sound cavity volume of sound production module can also be increased simultaneously, promote its acoustic performance. Further, the backshell is by the integrative injection moulding of second metal portion and second plastic portion, and the second metal portion of backshell is owing to be the metalwork, and than current plastic backshell, but the stamping forming of second metal portion has reduced the processing degree of difficulty, and its thickness attenuate, can increase the back chamber volume of sound production module, promotes the low frequency performance of sound production module. And the thickness reduction of the rear shell is favorable for reducing the Z-axis height of the whole sounding module, further favorable for reducing the Z-axis height of the whole machine and realizes the microminiaturization and ultrathin design of the product.

And, the sealed cooperation of side bounding wall and second plastic portion in the sound production module, and the integrative injection moulding of second metal portion and second plastic portion can realize the effective sealing of installation cavity, have waterproof function, improve water-proof effects, guarantee the normal use of sound production module. In addition, the first plastic portion of preceding shell and the equal injection moulding in second plastic portion of backshell can be according to the sound production monomer and with the shape shaping of first plastic portion and the other parts of second plastic portion complex go out complicated structure, structural design is reasonable, easily shaping.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an exploded view of a sound module according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a sound module according to an embodiment of the present invention;

fig. 3 is a schematic partial enlarged cross-sectional view of a sound module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a front shell in the sound module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rear housing in the sound module according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound production module	21244	Inclined section
10	Sound monomer	2125	Opening of the container
				11	Magnetic yoke	22	Rear shell
12	Vibrating diaphragm	221	Second metal part
				20	Shell body	222	The second plastic part
21	Front shell	2221	First mounting step
				211	A first metal part	22211	First bottom wall
2111	Front cover plate	22212	First side wall
				2112	Side coaming	223	First turned-over edge
2113	Injection molding positioning hole	224	Second turned-over edge
				2114	Plugging sheet	225	Mounting hole
2115	Damping hole	226	Fourth turned-over edge
				2116	Damping fin	227	Filling hole
2117	Third flanging	228	Filling sheet
				2118	Fifth flanging	23	Mounting chamber
212	A first plastic part	231	Front cavity
				2121	Supporting part	232	Rear cavity
2122	Sound conducting part	30	Magnetic isolation plate
				2123	Sound conducting channel	40	First glue coating groove
2124	Support step	50	Second glue coating groove
				21241	Second bottom wall	60	Third glue coating groove
21242	Second side wall	70	The fourth glue coating groove
				21243	Vertical segment	80	Circuit board

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, etc. under a certain posture (as shown in the drawings), and if the certain posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a sound production module 100.

As shown in fig. 1 to 5, the sound generating module 100 includes a sound generating unit 10 and a housing 20, the housing 20 includes a front shell 21 and a rear shell 22 that are engaged with each other, the front shell 21 and the rear shell 22 define a mounting chamber 23 for mounting the sound generating unit 10, the front shell 21 includes a first metal portion 211 and a first plastic portion 212, the first plastic portion 212 includes a support portion 2121 and a sound guide portion 2122, the support portion 2121 is configured to support the sound generating unit 10, at least a portion of the sound guide portion 2122 is located outside the mounting chamber 23, and the sound guide portion 2122 is communicated with the mounting chamber 23, the first metal portion 211 includes a front cover plate 2111 facing the rear shell 22 and a side wall plate 2112 bent and extended from the front cover plate 2111 toward the rear shell 22, the rear shell 22 includes a second metal portion 221 facing the front cover plate 2111 and a second plastic portion 222 integrally injection-molded with the second metal portion 221, and the second plastic portion 222 is located at an outer periphery of the second metal portion 221 and the side wall plate 2112 is in sealing fit.

The utility model discloses sound production module 100 can be applied to electronic device, for example in cell-phone, computer, the earphone, sound production module 100 can be the speaker box, and sound production unit 10 of sound production module 100 is the speaker unit promptly, and this embodiment sound production module 100 explains with the speaker box of being applied to in the cell-phone as the example.

Specifically, as shown in fig. 1 to 5, the front case 21 and the rear case 22 are arranged in the front-rear direction, the front case 21 and the rear case 22 define the mounting chamber 23, wherein the front case 21 includes a first metal part 211 and a first plastic part 212, the first plastic part 212 includes a support part 2121 and a sound guide part 2122, and the sound-emitting unit 10 is supported on the support part 2121, enabling assembly between the sound-emitting unit 10 and the front case 21. The rear case 22 includes a second metal part 221 and a second plastic part 222, and the second metal part 221 and the second plastic part 222 are integrally injection-molded.

The first metal portion 211 includes a front cover plate 2111 and side plates 2112, wherein the front cover plate 2111 faces the second metal portion 221, the side plates 2112 are formed by bending and extending from the front cover plate 2111 toward the rear shell 22, and one end of the side plates 2112 away from the front cover plate 2111, that is, the rear end of the side plates 2112 is in sealing fit with the second plastic portion 222 located at the periphery of the second metal portion 221, so as to achieve sealing of the installation chamber 23. In addition, the plastic part is provided with an opening 2125 opposite to the vibrating diaphragm 12 of the sound generating unit 10, a magnetic isolation plate 30 is arranged at the opening 2125, and the opening 2125 is blocked by the magnetic isolation plate 30 and is sealed with the first plastic part 212 by gluing. It is understood that the mounting chamber 23 is divided into a front chamber 231 and a rear chamber 232, wherein the front chamber 231 is surrounded by the magnetic shield 30, the sound generating unit 10 and the support portion 2121, and the sound guide portion 2122 has a sound guide passage 2123 communicated with the mounting chamber 23, and specifically, the sound guide passage 2123 of the sound guide portion 2122 is communicated with the front chamber 231 to realize normal sound generation. The rear cavity 232 is surrounded by the first metal part 211, the support part 2121, the sound generating unit 10, and the rear case 22.

Preceding shell 21 in this embodiment sound production module 100 is formed by first metal part 211 and first plastic part 212, the first metal part 211 of preceding shell 21 is owing to be the metalwork, shell 21 before the plastic of current, but metal part stamping forming, the processing degree of difficulty has been reduced, and its thickness is less, do not occupy the volume of installation cavity 23, optimize the acoustic performance of sound production module 100, and, first metal part 211 thickness is little then do benefit to the Z axle height that reduces whole sound production module 100, and then do benefit to and reduce complete machine Z axle height, realize the product miniaturization, frivolousization design, can also increase the sound cavity volume of sound production module 100 simultaneously, promote its acoustic performance. Further, the backshell 22 is by the integrative injection moulding of second metal portion 221 and second plastic part 222, and the second metal portion 221 of backshell 22 is owing to be the metalwork, and than current plastic backshell 22, but second metal portion 221 stamping forming has reduced the processing degree of difficulty, and its thickness attenuate, can increase the back chamber 232 volume of sound production module 100, promotes sound production module 100's low frequency performance. Moreover, the thickness of the rear shell 22 is reduced, which is beneficial to reducing the Z-axis height of the whole sounding module 100, and is further beneficial to reducing the Z-axis height of the whole machine, thereby realizing the subminiaturization and ultra-thin design of the product.

Moreover, the side wall plate 2112 is in sealing fit with the second plastic part 222 in the sound module 100, and the second metal part 221 and the second plastic part 222 are integrally formed by injection molding, so that effective sealing of the installation cavity 23 can be realized, a waterproof function is realized, a waterproof effect is improved, and normal use of the sound module 100 is ensured. In addition, both the first plastic part 212 of the front shell 21 and the second plastic part 222 of the rear shell 22 can be injection molded, and a complex structure can be molded according to the shapes of the sounding single body 10 and other components matched with the first plastic part 212 and the second plastic part 222, so that the structure is reasonable in design and easy to mold.

In one embodiment, the side gusset 2112 and the second metal portion 221 are welded and fixed, so as to improve the stability of the assembly of the front shell 21 and the rear shell 22. Moreover, a first glue coating groove 40 is defined between the side wall plate 2112 and the second plastic part 222, a sealant is coated in the first glue coating groove 40, and the sealant is coated in the first glue coating groove 40 to bond and seal the side wall plate 2112 and the second plastic part 222, so that the sealing reliability of the sound production module 100 is improved, and the waterproof grade is improved.

Specifically, the second plastic portion 222 is recessed towards a side of the front cover plate 2111 in a direction away from the front cover plate 2111 to form a first mounting step 2221, the first mounting step 2221 has a first bottom wall 22211 and a first side wall 22212, an outer edge of the second metal portion 221 passes through the second plastic portion 222 and is exposed out of the first bottom wall 22211, one end of the side wall plate 2112 away from the front cover plate 2111 is mounted on the first bottom wall 22211 and is welded and fixed with the second metal portion 221, and the side wall plate 2112 and the first side wall 22212 enclose a first glue groove 40.

As shown in fig. 2 and 3, the front side of the second plastic part 222 is recessed rearward to form a first mounting step 2221, and the first mounting step 2221 has a first bottom wall 22211 and a first side wall 22212, wherein the outer edge of the second metal part 221 extends forward and passes through the second plastic part 222, and the second metal part 221 is exposed out of the first bottom wall 22211 so as to be welded and fixed with the rear end of the side wall plate 2112, so that the assembling firmness of the front shell 21 and the rear shell 22 is improved. Meanwhile, the side wall plates 2112 and the first side wall 22212 enclose a first glue slot 40, and glue is applied in the first glue slot 40, so that the assembling tightness between the front shell 21 and the rear shell 22 is improved. The assembly mode between the front shell 21 and the rear shell 22 is ingenious and reasonable.

Further, the outer edge of the second metal part 221 forms a flanging structure penetrating through the second plastic part 222, the flanging structure includes a first flanging 223 and a second flanging 224, the first flanging 223 is formed by bending from the outer edge of the second metal part 221 toward the front cover plate 2111, the second flanging 224 is formed by bending from the first flanging 223 along a direction perpendicular to the first flanging 223, and the second flanging 224 is exposed from the first bottom wall 22211 and is welded and fixed to one end of the side wall plate 2112 away from the front cover plate 2111.

As shown in fig. 2 and 3, the first flange 223 of the flange structure is formed by bending forward from the outer edge of the second metal portion 221, the second flange 224 is formed by bending forward in a direction perpendicular to the first flange 223, specifically, in a direction away from the mounting cavity 23, and the second flange 224 is exposed out of the first bottom wall 22211 so as to be welded and fixed with the rear end of the side gusset 2112.

Furthermore, the side gusset plate 2112 is provided with a third flange 2117, the third flange 2117 is formed by bending from one end of the side gusset plate 2112 away from the front cover plate 2111 along a direction perpendicular to the side gusset plate 2112, the third flange 2117 and the second flange 224 are arranged in parallel and welded and fixed, and the third flange 2117 and the first side wall 22212 enclose a first glue coating groove 40.

As shown in fig. 2 and 3, the third turned edge 2117 is bent from the rear end of the side gusset 2112 in a direction perpendicular to the side gusset 2112, specifically, in a direction away from the mounting chamber 23, and the third turned edge 2117 and the second turned edge 224 are arranged in parallel, so as to facilitate welding and fixing of the two. By arranging the second turned-over edge 224 and the third turned-over edge 2117, the welding area between the front shell 21 and the rear shell 22 is increased, the welding is easy, and the assembling stability of the front shell 21 and the rear shell 22 is improved to the maximum extent. A first glue coating groove 40 is formed between the third flanging 2117 and the first side wall 22212 in a surrounding mode, glue is coated in the first glue coating groove 40, so that the assembling sealing performance between the front shell 21 and the rear shell 22 is improved, and the structural design is reasonable and ingenious.

In an embodiment, the supporting portion 2121 is fixed to the front cover plate 2111, a second glue coating groove 50 is defined between the sounding monomer 10 and the supporting portion 2121, a sealant is coated in the second glue coating groove 50, and the sealant is coated in the second glue coating groove 50 to bond and seal the sounding monomer 10 and the supporting portion 2121, so that the sealing reliability of the sounding module 100 is improved, and the waterproof grade is improved.

Specifically, the supporting portion 2121 is recessed towards the front cover plate 2111 from one side of the rear housing 22 to form a supporting step 2124, the supporting step 2124 has a second bottom wall 21241 and a second side wall 21242, the side of the sound generating unit 10 facing the front cover plate 2111 is supported on the second bottom wall 21241, and a second glue groove 50 is defined between the side wall of the sound generating unit 10 and the second bottom wall 21241 and the second side wall 21242.

As shown in fig. 2 and 3, the rear side of the supporting portion 2121 is recessed forward to form a supporting step 2124, and the supporting step 2124 has a second bottom wall 21241 and a second side wall 21242, wherein the front side of the sound generating unit 10 can be supported on the second bottom wall 21241, and a second glue groove 50 is defined between the side wall of the sound generating unit 10 and the second bottom wall 21241 and the second side wall 21242 of the supporting step 2124, so that the assembly and the sealing of the sound generating unit 10 and the front shell 21 are realized by applying a sealant in the second glue groove 50. The supporting step 2124 is arranged on the supporting portion 2121, so that the second glue coating groove 50 is formed by enclosing the sounding monomer 10 and the supporting step 2124, the sealing performance between the sounding monomer 10 and the supporting portion 2121 is guaranteed while the sounding monomer 10 is supported, and the structural design is ingenious and reasonable.

Further, the second side wall 21242 has a vertical section 21243 and an inclined section 21244 connected to each other, the vertical section 21243 being connected perpendicularly to the second bottom wall 21241; the inclined section 21244 extends from the vertical section 21243 toward the rear case 22 and is inclined away from the sound-generating unit 10. Vertical section 21243 is connected in the place ahead of slope section 21244, slope section 21244 extends backward from the rear end of vertical section 21243, and the orientation slope of keeping away from sound production monomer 10, promptly, slope section 21244 sets up from going to the back external inclination, make the distance between slope section 21244 and the sound production monomer 10 enlarge after going forward gradually, and then make second rubber coating groove 50 expand after going forward gradually in slope section 21244 department, not only do benefit to assembly sound production monomer 10, do benefit to again and glue coating in the second rubber coating groove 50.

In an embodiment, a mounting hole 225 is formed in the position of the rear shell 22 corresponding to the yoke 11 of the sound generating unit 10, the yoke 11 is mounted at the mounting hole 225 and is in sealing fit with the rear shell 22, and the yoke 11 is exposed out of the rear shell 22. As shown in fig. 1 to 5, the back of the sound generating unit 10 has a magnetic yoke 11, a mounting hole 225 is formed in the back shell 22 at a position corresponding to the magnetic yoke 11, the magnetic yoke 11 is mounted in the mounting hole 225 and is in sealing fit with the back shell 22, so as to ensure the sealing performance of the mounting cavity 23, and meanwhile, the magnetic yoke 11 is exposed out of the back shell 22. The mounting hole 225 is formed in the rear shell 22, and the magnetic yoke 11 is exposed out of the rear shell 22, so that the rear shell 22 is hollowed out in the mounting hole 225, the thickness of the rear shell 22 in the mounting hole 225 is omitted, the Z-axis height of the sound module 100 is further reduced, the Z-axis height of the whole machine is reduced, and the design of microminiaturization and ultra-thinning of the product is realized. The utility model discloses a sound production module 100, thickness are 0.15mm ~0.2mm, compare in the sound production module 100 of current adoption plastic housing 20, the utility model discloses sound production module 100's thickness attenuate more than 0.3 mm.

In an embodiment, the position of the rear shell 22 close to the mounting hole 225 is bent toward one side of the front cover plate 2111 to form a fourth flange 226, the fourth flange 226 surrounds the mounting hole 225 and is abutted with the outer edge of the magnetic yoke 11 to form a third glue coating groove 60, and a sealant is coated in the third glue coating groove 60.

As shown in fig. 2 and 3, the fourth flange 226 is formed by bending the rear shell 22 forward, the fourth flange 226 encloses the mounting hole 225, the magnetic yoke 11 is mounted at the mounting hole 225, the fourth flange 226 is abutted with the outer edge of the magnetic yoke 11 to form a third glue coating groove 60, and a sealant is coated in the third glue coating groove 60, so that the sealing between the sound generating unit 10 and the rear shell 22 is realized, and the reliability of the waterproof function of the sound generating module 100 is ensured.

In an embodiment, the first metal part 211 and the first plastic part 212 are integrally injection molded, so that the manufacturing is facilitated, the assembly steps and assembly errors are omitted, and meanwhile, the sealing performance of the first metal part 211 and the first plastic part 212 can be improved. The edge of the front cover plate 2111 away from the side gusset plate 2112 forms a fifth flange 2118 turned toward the rear shell 22, and the fifth flange 2118 is embedded in the first plastic part 212. As shown in fig. 2 and 3, an edge of the front cover plate 2111 forming the opening 2125 is turned over backward to form a fifth turned-over edge 2118, and the fifth turned-over edge 2118 is embedded in the first plastic part 212, so that the first metal part 211 and the first plastic part 212 are integrally molded, and the structural stability of the front housing 21 is improved.

In an embodiment, the front cover plate 2111 has at least two injection positioning holes 2113 located at the outer side of the first plastic portion 212, and the injection positioning holes 2113 are covered with the blocking sheet 2114. As shown in fig. 1 to 5, the number of the injection positioning holes 2113 is two, the two injection positioning holes 2113 are disposed at an interval outside the first plastic portion 212, and the injection positioning holes 2113 are favorable for accurate positioning when the first metal portion 211 and the first plastic portion 212 are injected, so as to improve the structural stability of the front housing 21.

Further, a filling cavity is arranged in the installation cavity 23, and the injection molding positioning hole 2113 is communicated with the filling cavity so as to fill the sound absorption particles into the filling cavity through the injection molding positioning hole 2113. It can be understood that the filling cavity is the rear cavity 232, the injection molding positioning hole 2113 is communicated with the rear cavity 232, and the sound absorption particles can be filled into the filling cavity through the injection molding positioning hole 2113, so that low-frequency distortion can be reduced by the sound absorption particles, and the acoustic performance of the sound production module 100 is improved. Injection molding positioning hole 2113 has the functions of positioning and filling sound absorption particles, so that the multifunctional design is realized, and the structural design is ingenious and reasonable.

In addition, the rear shell 22 is opened with a filling hole 227 for filling sound-absorbing particles, a filling sheet 228 is covered at the filling hole 227, and the filling hole 227 is sealed by the filling sheet 228. The filling hole 227 is formed in the rear shell 22, and the filling hole 227 can be used for filling the sound absorption particles into the rear cavity 232, so that the method is simple and convenient. Moreover, the filling sheet 228 seals the filling hole 227, so that the sound absorption particles are prevented from leaking, and the sealing performance of the rear cavity 232 can be ensured. The front cover plate 2111 is further provided with a damping hole 2115 communicated with the rear cavity 232, a damping sheet 2116 is covered at the position of the damping hole 2115, the damping sheet 2116 seals the damping hole 2115, the rear cavity 232 is integrally designed in a closed type and is communicated with the outside only through the damping hole 2115, the fact that the air pressure in the rear cavity 232 is the same as that in the front cavity 231 is guaranteed, the acoustic performance of the sound production module 100 is improved, the damping sheet 2116 covers the position of the damping hole 2115, the damping effect is achieved, and noise is reduced.

In an embodiment, the first plastic part 212 is provided with an opening 2125 facing the diaphragm 12 of the sound generating unit 10, the magnetic isolation plate 30 is disposed at the opening 2125, and the opening 2125 is blocked by the magnetic isolation plate 30 and sealed with the first plastic part 212 by gluing. The magnetic isolation plate 30 can be a metal sheet, can be formed by stamping, reduces the processing difficulty, has small thickness, can enlarge the volume of the installation cavity 23, further optimizes the acoustic performance of the sounding module 100, realizes the miniaturization and light and thin design of products, can ensure the rigidity of the shell 20 by the magnetic isolation plate 30, and ensures the structural stability of the sounding module 100. The magnetic isolation plate 30 has an isolation function, so that the magnetic isolation function of the whole machine is realized, and the acoustic performance of the sound production module 100 is not affected. Specifically, the magnetic shield 30 is made of SPCC (generally cold rolled carbon steel sheet and steel strip), and is easily available in materials and manufacture. Furthermore, the thickness of the magnetic isolation plate 30 is 0.15mm to 0.3mm, and the thickness is thinner, which is beneficial to reducing the overall thickness of the sound generating module 100.

Further, a fourth glue coating groove 70 is defined between the magnetic shield 30 and the first plastic part 212, a sealant is coated in the fourth glue coating groove 70, and the sealant is coated in the first glue coating groove 40 to bond and seal the metal sheet and the plastic part, so that the sealing reliability of the sounding module 100 is improved, and the waterproof grade is improved.

In one embodiment, the sound generating unit 10 is disposed obliquely with respect to the front cover plate 2111, and the distance between the side of the sound generating unit 10 close to the front cover plate 2111 and the front cover plate 2111 increases in the flow direction of the air flow. As shown in fig. 2 and 3, the airflow flows from the front cavity 231 into the sound guide channel 2123, and the distance between the front side of the sounding unit 10 and the front cover plate 2111 gradually increases along the flow direction of the airflow, that is, the volume of the front cavity 231 gradually increases along the flow direction of the airflow, so that the flow resistance of the airflow can be reduced, the airflow can smoothly flow into the sound guide channel 2123, and the acoustic performance of the sounding module 100 is optimized. Moreover, the sound guide portion 2122 is located at the side portion of the mounting chamber 23, so that the sound emitting module 100 emits sound at the side portion, and the sound emitting module 100 is conveniently applied to electronic devices such as mobile phones and the like which have a small thickness and require sound at the side portion.

It should be noted that, as shown in fig. 1, the sounding unit 10 is conducted with an external device through the circuit board 80, the side wall plate 2112 is provided with a notch for the circuit board 80 to pass through, and the circuit board 80 is hermetically connected with the side wall plate 2112 and the rear shell 22. The circuit board 80 realizes the conduction of the sounding monomer 10 and external devices, realizes the normal operation of the sounding module 100, and the circuit board 80 is hermetically connected with the side wall plates 2112 and the rear shell 22, so that the sealing performance of the installation cavity 23 is ensured.

The utility model discloses in the sound production module 100, the second metal portion 221 of backshell 22 and the first metal portion 211 of preceding shell 21 can be stainless steel finished piece, have easily draw materials and shaping and rust-resistant advantage of losing. The blocking piece 2114 and the filling piece 228 can be made of a PET (polyester resin) material, so that the manufacture is convenient, and the packaging reliability can be ensured.

The utility model also provides an electronic device, electronic device include the shell and accept foretell sound production module 100 in the shell. The electronic device can be a mobile phone, a computer, an earphone, etc. The specific structure of the sound module 100 in the electronic device refers to the above embodiments, and since the electronic device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. The utility model provides a sound production module, its characterized in that, sound production module includes:

a sounding monomer;

2. The acoustic module of claim 1 wherein the side panel is welded to the second metal portion, and a first glue groove is defined between the side panel and the second plastic portion, and a sealant is disposed in the first glue groove.

3. The sound generating module of claim 2, wherein the second plastic portion is recessed towards a side of the front cover plate in a direction away from the front cover plate to form a first mounting step, the first mounting step has a first bottom wall and a first side wall, an outer edge of the second metal portion penetrates through the second plastic portion and is exposed out of the first bottom wall, one end of the side enclosing plate, which is away from the front cover plate, is mounted on the first bottom wall and is welded and fixed with the second metal portion, and the side enclosing plate and the first side wall enclose the first glue coating groove.

4. The acoustic module of claim 3, wherein the outer edge of the second metal portion forms a flange structure penetrating the second plastic portion, the flange structure includes a first flange and a second flange, the first flange is formed by bending the outer edge of the second metal portion toward the front cover plate, the second flange is formed by bending the first flange in a direction perpendicular to the first flange, and the second flange is exposed from the first bottom wall and is welded and fixed to one end of the side panel away from the front cover plate.

5. The sound production module of claim 4, wherein the side enclosing plate is provided with a third flange, the third flange is formed by bending from one end of the side enclosing plate far away from the front cover plate along a direction perpendicular to the side enclosing plate, the third flange and the second flange are arranged in parallel and are welded and fixed, and the third flange and the first side wall enclose the first glue coating groove.

6. The acoustic module of claim 1 wherein the support portion is secured to the front cover plate, a second glue groove is defined between the acoustic unit and the support portion, and a sealant is disposed in the second glue groove.

7. The sound generating module according to claim 6, wherein the supporting portion is recessed toward the front cover plate to form a supporting step, the supporting step has a second bottom wall and a second side wall, the sound generating unit is supported on the second bottom wall toward one side of the front cover plate, and the second glue groove is defined between the side wall of the sound generating unit and the second bottom wall and the second side wall.

8. The sound generating module of claim 6, wherein said second side wall has an interconnected vertical section and an inclined section, said vertical section being connected perpendicularly to said second bottom wall; the slope section certainly vertical section orientation the direction of backshell extends, and the orientation is kept away from the free direction slope of sound production.

9. The sound generating module of claim 1, wherein the back shell has a mounting hole corresponding to the yoke of the sound generating unit, the yoke is mounted at the mounting hole and is in sealing engagement with the back shell, and the yoke is exposed from the back shell.

10. The acoustic module of claim 9, wherein the position of the rear housing near the mounting hole is bent to one side of the front cover plate to form a fourth flange, the fourth flange surrounds the mounting hole and is abutted against the outer edge of the magnetic yoke to form a third glue coating groove, and a sealant is coated in the third glue coating groove.

11. The sound generating module of any one of claims 1-10, wherein the first metal part and the first plastic part are integrally injection molded.

12. The sound production module as claimed in claim 11, wherein the edge of the front cover plate away from the side wall plates forms a fifth flange folded towards the rear housing, and the fifth flange is embedded in the first plastic part.

13. The acoustic module of claim 11, wherein the front cover plate defines at least two injection-molding positioning holes located outside the first plastic portion, and the injection-molding positioning holes are covered with a sealing sheet.

14. The sound generating module of claim 13, wherein a filling cavity is disposed in the mounting cavity, and the injection positioning hole communicates with the filling cavity to fill the filling cavity with sound-absorbing particles through the injection positioning hole.

15. The sound generating module according to any one of claims 1 to 10, wherein the first plastic part has an opening facing the diaphragm of the sound generating unit, the opening is provided with a magnetic isolation plate, and the magnetic isolation plate seals the opening and seals the opening with the first plastic part by gluing.

16. The acoustic module of claim 15 wherein a fourth glue slot is defined between the magnetic shield and the first plastic portion, and a sealant is disposed within the fourth glue slot.

17. An electronic device, comprising a housing and the sound module as claimed in any one of claims 1 to 16 accommodated in the housing.