The present invention relates to electro-acoustic product technical field, more particularly to a kind of loudspeaker module.
Loudspeaker module is the important acoustic element of portable electric appts, for completing between electric signal and voice signal
Conversion, be a kind of energy conversion device.Existing loudspeaker module generally includes shell, contained in shell vibrational system and
Magnetic circuit system.Vibrational system includes the vibrating diaphragm and voice coil loudspeaker voice coil being fixed together, and magnetic circuit system includes frame and is sequentially fixed at basin
Whole module inner chamber is separated into two cavitys of the preceding operatic tunes and the rear operatic tunes by magnet and washer on frame, vibrating diaphragm.In order to reduce module
F0 (low frequency), spread bandwidth, technical staff would generally set up acoustical cotton in the rear operatic tunes, and acoustical cotton can effectively reduce module
F0, and cause intermediate frequency curve it is more smooth.
Existing acoustical cotton thickness is fixed, but the rear operatic tunes shape of some modules and irregular, is wanted thickness
Fixed acoustical cotton is filled into the rear operatic tunes that this height rises and falls, and can only be protected by the way of polylith acoustical cotton is pasted and pieced together
Card acoustical cotton is adapted with the rear operatic tunes, but this mode causes the compactness between acoustical cotton and housing, and the compression of acoustical cotton
Than etc. be all difficult control, cause the uniformity of module poor；And this mode can only be by manually pasting, the labor intensity of worker
Greatly, operation difficulty is high, causes cost of labor high, so as to cause production cost high, low production efficiency.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of loudspeaker module, and this loudspeaker module uniformity is good, into
This is low, and production efficiency is high.
In order to solve the above technical problems, the technical scheme is that：
A kind of loudspeaker module, including shell, loudspeaker monomer are contained in the shell, the loudspeaker monomer includes
Whole module inner chamber is divided into two cavitys of the preceding operatic tunes and the rear operatic tunes by vibrational system and magnetic circuit system, the loudspeaker monomer,
Acoustical cotton is provided with after described in the operatic tunes, the shape of the acoustical cotton is adapted with the rear operatic tunes, and the material of the acoustical cotton is
Melamine, the acoustical cotton are process by heat pressing process.
Wherein, the module inner chamber in the module inner chamber positioned at the adjacent both sides sidepiece of the loudspeaker monomer is described
The operatic tunes afterwards, the spatial altitude positioned at the rear acoustic cavity portion of the loudspeaker monomer side is larger, positioned at the loudspeaker list
The spatial altitude of the rear acoustic cavity portion of body opposite side is smaller.
Wherein, the larger rear acoustic cavity portion of spatial altitude is coffin, and the side of the coffin is plane,
Opposite side intermediate altitude is big, and both ends are highly small；Spatial altitude it is less it is described after acoustic cavity portion be also coffin, the square
The one end in shape space is highly big, and the other end is highly small.
Wherein, horizontal row shows two pieces of acoustical cottons, the shape of one piece of acoustical cotton therein in the rear operatic tunes
The rear acoustic cavity portion larger with spatial altitude is adapted, shape and the less institute of spatial altitude of another piece of acoustical cotton
Rear acoustic cavity portion is stated to be adapted.
Wherein, the shell includes the first housing, the second housing and the 3rd housing being combined together successively, described to raise one's voice
Device monomer, second housing and the 3rd housing surround the rear operatic tunes jointly.
Wherein, the magnetic circuit system includes being fixed on frame on second housing, the center of the frame according to
Secondary to be provided with internal magnet and interior washer, the marginal position of the frame is sequentially provided with external magnet and outer washer；Positioned at the external magnet
The frame of inner side is provided with the spacing block set for being used for preventing that the external magnet and the outer washer from moving inward.
Wherein, the external magnet and the outer washer are arranged on the marginal position of the both sides long side of the frame.
Wherein, it is equipped with the outside of two outer washers and lacks the location division that material is formed, two location divisions is and institute
State the engaging of the second housing.
Wherein, the vibrational system includes the vibrating diaphragm and voice coil loudspeaker voice coil that are combined together, the voice coil loudspeaker voice coil away from the vibrating diaphragm one
End number of turns is more, and thickness is big.
Wherein, the module also includes being used for the electric connection structure for electrically connecting the voice coil loudspeaker voice coil and module external circuit, described
Electric connection structure includes the FPCB being electrically connected and connection shell fragment, and the FPCB electrically connects the voice coil loudspeaker voice coil, the connection bullet
Piece electrically connects the module external circuit.
After employing above-mentioned technical proposal, the beneficial effects of the invention are as follows：
Because the acoustical cotton in loudspeaker module of the present invention is adapted with the operatic tunes after module, the material of acoustical cotton is melamine
Amine, and be process by heat pressing process.Heat pressing process is to be placed into the acoustical cotton of fixed thickness and operatic tunes shape after module
In consistent mould, first compression shaping, the compression ratio of acoustical cotton different parts can be controlled, produce and more stick on
The acoustical cotton of the operatic tunes after matched moulds group.Such a method for making acoustical cotton has following excellent compared with existing artificial bonding acoustical cotton
First, the making of acoustical cotton is completed by the machinery such as compressor, the quantity of worker is effectively reduced, saves people
Work, production cost is reduced, improve production efficiency.
2nd, the acoustical cotton of different-thickness can be made, good product consistency higher with the laminating degree of the operatic tunes after module.
3rd, the F0 of module greatly reduces so that the frequency band of module is wider, and the acoustical behavior of module is more preferably.
Brief description of the drawings
Fig. 1 is the dimensional decomposition structure diagram of loudspeaker module of the present invention；
Fig. 2 is Fig. 1 constitutional diagram；
Fig. 3 is the cross-sectional view of loudspeaker module of the present invention；
Fig. 4 is the structural representation of the first acoustical cotton in Fig. 1；
Fig. 5 is the structural representation of the second acoustical cotton in Fig. 1；
Fig. 6 is heat pressing process schematic diagram；
Fig. 7 is a kind of structure chart of acoustical cotton of heat pressing process processing；
Fig. 8 is the structure chart of another acoustical cotton of heat pressing process processing；
Fig. 9 is the structure chart of another acoustical cotton of heat pressing process processing；
Figure 10 is the structure chart of another acoustical cotton of heat pressing process processing；
In figure：10th, the first housing, the 20, second housing, the 30, the 3rd housing, 32, leak holes, 40, top dome, 42, vibrating diaphragm,
44th, voice coil loudspeaker voice coil, 50, frame, 500, spacing block set, 520, internal magnet, 522, external magnet, 540, interior washer, 542, outer washer, 544,
Location division, 60, FPCB, 62, connection shell fragment, the 70, first acoustical cotton, the 72, second acoustical cotton, 74, acoustical cotton raw material, 80, damping,
90th, top die head, 92, lower frock.
With reference to the accompanying drawings and examples, the present invention is expanded on further.
It is jointly shown with Fig. 3 as shown in Figure 1, Figure 2, a kind of loudspeaker module, including the first housing 10, second being combined together
The housing 30 of housing 20 and the 3rd, loudspeaker is contained in the space that the first housing 10, the second housing 20 and the 3rd housing 30 surround
Monomer, loudspeaker monomer include vibrational system and magnetic circuit system.
As Fig. 1 and Fig. 3 are jointly shown, vibrational system including edge be fixed on the second housing 20 and the first housing 10 it
Between vibrating diaphragm 42, vibrating diaphragm 42 is fixed with top dome 40 close to the middle part of the side of the first housing 10, and the opposite side of vibrating diaphragm 42 is consolidated
Surely have a voice coil loudspeaker voice coil 44, voice coil loudspeaker voice coil 44 around wiretapping be voice coil leads.Magnetic circuit system includes the frame 50 being fixed on the second housing 20,
The center of the bottom of frame 50 is fixed with internal magnet 520 and interior washer 540, the edge of the both sides long side of the bottom of frame 50 successively
Position is fixed with external magnet 522 and outer washer 542 successively.Internal magnet 520 and interior washer 540 and external magnet 522 and outer washer
Magnetic gap is provided between 542, the end of voice coil loudspeaker voice coil 44 is located in magnetic gap.Voice coil loudspeaker voice coil 44 is according to passing through the big of the alternating current in its coiling
Reciprocal cutting magnetic line movement is done in small and direction in magnetic gap, and vibrating diaphragm 42 vibrates, plan with the reciprocating motion of voice coil loudspeaker voice coil 44
Dynamic air sounding, so as to complete the energy conversion between electroacoustic.
As Fig. 1 and Fig. 3 are jointly shown, whole module inner chamber is divided into two cavitys of the preceding operatic tunes and the rear operatic tunes by vibrating diaphragm 42.
First housing 10 and vibrating diaphragm 42 surround the preceding operatic tunes, and vibrating diaphragm 42, the second housing 20 and the 3rd housing 30 surround the rear operatic tunes jointly.Module
Module inner chamber in inner chamber positioned at the adjacent both sides sidepiece of loudspeaker monomer is the rear operatic tunes, positioned at the rear sound of loudspeaker monomer long side
The spatial altitude of cavity segment is larger, and the spatial altitude positioned at the rear acoustic cavity portion of loudspeaker monomer short brink is smaller.Spatial altitude
Larger rear acoustic cavity portion is coffin, and the side of coffin is plane, and opposite side intermediate altitude is big, and both ends are highly small；
Acoustic cavity portion is also coffin after spatial altitude is less, and one end of the coffin is highly big, and the other end is highly small.In order to
Reduce the F0 of module so that intermediate frequency curve is more smooth, and the first acoustical cotton 70 and the second sound-absorbing are provided with the rear operatic tunes of module
Cotton 72, the first acoustical cotton 70 and the second acoustical cotton 72 are horizontally arranged in the rear operatic tunes, the first acoustical cotton 70 be located at spatial altitude compared with
Big rear acoustic cavity portion, the second acoustical cotton 72 are located at the less rear acoustic cavity portion of spatial altitude.First acoustical cotton 70 and second is inhaled
The structure of sound cotton 72 is as shown in Figure 4 and Figure 5, consistent with the structure of the rear acoustic cavity portion at place.First acoustical cotton 70 and
Two acoustical cottons 72 are melamine acoustical cotton, and once-forming by heat pressing process.It is such a once-forming by heat pressing process
Acoustical cotton processing and fabricating it is more simple and easy, it is higher with the housing compactness that surrounds the rear operatic tunes, effectively raise product
The acoustical behavior of uniformity and product.
As shown in fig. 6, heat pressing process be acoustical cotton raw material 74 is placed on it is consistent with the downside shell structure of the rear operatic tunes
Lower frock 92 in, lower frock 92 is fixing device, and a top die first 90 moving up and down is provided with the top of lower frock 92,
The structure of top die first 90 is consistent with the upside shell structure of the rear operatic tunes, after acoustical cotton raw material 74 is placed into lower frock, control
Top die first 90 processed is moved down, and acoustical cotton raw material 74 is compressed, so as to obtain the sound-absorbing consistent with rear operatic tunes shape
Cotton.Such a manufacture craft reduces cost of labor, improves production efficiency again compared with existing artificial bonding.
As shown in figure 1, it is provided with spacing block set 500, spacing block set 500 positioned at the position of the inner side of external magnet 522 in frame 50
It can effectively prevent that external magnet 522 and outer washer 542 are close to internal magnet 520 and interior washer 540 under the action of a magnetic force, protect
The stability of product is demonstrate,proved.
As Fig. 1 and Fig. 3 are jointly shown, the outside of two outer washers 542, which is equipped with, lacks the location division 544 that material is formed, positioning
Portion 544 causes the outside of outer washer 542 to form hierarchic structure.When carrying out module group assembling, location division 544 and the phase of the second housing 20
Engaging, positioning and position-limiting action are played to magnetic circuit system.
As Fig. 1 and Fig. 3 are jointly shown, the one end (one end i.e. in magnetic gap) of voice coil loudspeaker voice coil 44 away from vibrating diaphragm 42 is around wire turn
Number is more, and thickness is big.Magnetic gap can be sufficiently utilized, the active force in magnetic field is improved, adds the sensitivity of module.
Jointly shown with Fig. 3 as shown in Figure 1, Figure 2, module also includes the electric connection structure being fixed on the second housing 20, is electrically connected
Binding structure includes being electrically connected two FPCB60 and two connection shell fragments 62 together, and two FPCB60 are electrically connected two
Root voice coil leads, two connection shell fragments 62 are exposed at the circuit outside the external electrical connections module of module.
It is used to connect the extraneous and leak of the rear operatic tunes 32 as shown in figure 1, the 3rd housing 30 is provided with, leak 32 is used for
Module inner and outer air pressure is balanced, also there is the function of distributing heat caused by vibrational system and magnetic circuit system work.Let out
Small opening 32 is located at the one end in the outside of the 3rd housing 30 covered with damping 80.The side that 3rd housing 30 is located at module internal is interior
Side, the side outside module are outside.
The present embodiment be only by taking the module shown in accompanying drawing 1 to 3 as an example to acoustical cotton of the present invention by heat pressing process process and
Into technical scheme carry out for example, this technical scheme may be used on setting in the operatic tunes after any one and inhale in practical application
In the loudspeaker module of sound cotton, only need to carry out frock according to the structure of module due to being applied in other structures loudspeaker module
With the change of die head, those skilled in the art are according to the elaboration of this specification, it is not necessary to and pay creative work and can be achieved, therefore
Technical scheme on making acoustical cotton using heat pressing process is applied to the embodiment in other structures loudspeaker module
No longer it is described in detail one by one herein.
Structure shown in attached Figure 4 and 5 is also not necessarily limited to by the structure of acoustical cotton made from heat pressing process, by changing frock
The acoustical cotton of different structure, the list shown in one side step structure as shown in Figure 7, Fig. 8 can be processed with the structure of die head
The acoustical cottons such as the two-sided convex structure shown in two-sided step structure, Figure 10 shown in face convex structure, Fig. 9.
The name of the first housing, the second housing and the 3rd housing that are related in the present invention is intended merely to difference technology spy
Sign, erection sequence, job order and position relationship between three etc. are not represented.
The name of the first acoustical cotton and the second acoustical cotton that are related in the present invention is intended merely to distinguishing feature, not generation
The erection sequence of table therebetween, job order and position relationship etc..
The present invention is not limited to above-mentioned specific embodiment, one of ordinary skill in the art from above-mentioned design,
Without performing creative labour, made a variety of conversion, it is within the scope of the present invention.