Utility model content
Technical problem to be solved in the utility model is to provide a kind of loud speaker module, in the situation that loud speaker module size is certain, can make full use of the inner space of loud speaker module, strengthens bass effect, thereby improves the acoustical behavior of product.
In order to solve the problems of the technologies described above, the utility model provides a kind of loud speaker module, comprises initiatively sound source, passive sound location, and accommodate the protection framework of fixing described active sound source, passive sound location; Described active sound source involving vibrations system and magnetic circuit system, described vibrational system comprises vibrating diaphragm and voice coil loudspeaker voice coil, magnetic circuit system forms the magnetic gap of accommodating described voice coil loudspeaker voice coil; Between described vibrating diaphragm upside and described protection framework, form the described front operatic tunes, between described vibrating diaphragm downside and described protection framework, form the described rear operatic tunes, wherein, described passive sound location is arranged in the described rear operatic tunes, comprise two passive radiators that are oppositely arranged, two passive radiators are the structure be arrangeding in parallel; Two passive radiators include vibrating diaphragm body and are incorporated into the mass on described vibrating diaphragm body, and described mass is tungsten alloy material.
In addition, preferred scheme is between described vibrating diaphragm body and described mass, to pass through the mode secure bond of glue spraying.
In addition, preferred scheme is that described mass is tungsten steel alloy material.
In addition, preferred scheme is that described mass is tungsten nickel and stainless steel alloy.
In addition, preferred scheme is that the described vibrating diaphragm body of two described passive radiators is thermoplastic polyurethane material.
In addition, preferred scheme is that upside and the downside of the vibrating diaphragm body of arbitrary described passive radiator are all combined with described mass.
In addition, preferred scheme is that upside or the downside of the vibrating diaphragm body of arbitrary described passive radiator are combined with described mass.
In addition, preferred scheme is, between two described passive radiators, surround a cavity, initiatively the described vibrating diaphragm of sound source is divided into two parts near the sound wave of a side of magnetic circuit system, be transferred to respectively the side of two passive radiators away from described cavity, the sound wave in described cavity is extruded by the phonate hole of passive sound location and is radiated the external world.
In addition, preferably scheme is, described protection framework comprises upper casing, mesochite and lower casing, and described mesochite and described lower casing are accommodated fixing described passive sound location, and just the part of described passive radiator are combined with to sheet metal on described mesochite and described lower casing.
In addition, preferably scheme is, described active sound source is provided with the initiatively phonate hole of sound source, and the phonate hole of described active sound source is communicated with the described front operatic tunes.
Adopt after technique scheme, compared with traditional structure, the utility model is provided with the passive sound location with two passive radiators in the rear operatic tunes of loud speaker module, can strengthen the bass effect of product; And on two passive radiators, be combined with the mass of tungsten alloy material, the in the situation that of limited in inner space, can further strengthen the bass effect of loud speaker module.
Below with reference to accompanying drawing, specific embodiment of the utility model is described in detail.
Fig. 1 is the cross-sectional view of the utility model loud speaker module, and as shown in the figure, loud speaker module comprises the active sound source that is positioned at left side, is positioned at the passive sound location on right side, and accommodates the protection framework of active sound source and passive sound location.Wherein, protection framework comprises upper casing 11, the mesochite 12 that is positioned at upside (near vibrating diaphragm one side) and the lower casing 13 that is positioned at downside.Initiatively sound source is the part that can independently sound, involving vibrations system and magnetic circuit system; Wherein vibrational system comprises vibrating diaphragm 21 and the voice coil loudspeaker voice coil 22 that is incorporated into vibrating diaphragm 21 downsides; Magnetic circuit system comprises washer 31, magnet 32 and the basin frame 33 of combination successively, in magnetic circuit system, between the lateral surface of washer 31, magnet 32 and basin frame 33 sidewalls, there is certain interval, this gap is magnetic gap, and voice coil loudspeaker voice coil 22 is contained in this magnetic gap, and the magnetic line of force that magnetic circuit system forms is through voice coil loudspeaker voice coil 22.Voice coil loudspeaker voice coil 22 is subject to Ampere force up-down vibration after connecting the signal of telecommunication in magnetic circuit system, further drives vibrating diaphragm generation of vibration sound.
Initiatively sound source is the structure of speaking in side, forms the initiatively phonate hole 10 of sound source between upper casing 11 and mesochite 12, as shown in Figure 1, is positioned at protection frame facet, and concrete, phonate hole 10 is combined in side by upper casing 11 and mesochite 12.The upside of vibrating diaphragm 21 is the upper casing 11 in protection framework; upper casing 11 comprises plastic body; the center of upper casing 11 is injected with sheet metal 110; metal material can reach desirable strength in the time of thinner thickness; therefore; the structure of this injection moulding sheet metal can reduce the thickness of loud speaker module, or the inner space that can increase loud speaker module in the situation that loud speaker module thickness is certain.The fixing magnetic circuit system of mesochite 12, by the mode secure bond of bonding or ultrasonic bonding, accommodates fixing initiatively sound source by upper casing 11 and mesochite 12 between upper casing 11 and mesochite 12.Vibrating diaphragm 21 is the front operatic tunes and the rear operatic tunes by the spatial separation of loud speaker module internal; the front operatic tunes is the space surrounding between vibrating diaphragm 21 upsides and protection framework; the front operatic tunes is communicated with the phonate hole 10 of active sound source; make sound can be radiated the external world; but be not limited to this structure, also can be communicated with phonate hole 10 for the rear operatic tunes.The rear operatic tunes is the operatic tunes that vibrating diaphragm 21 forms near magnetic circuit system one side, and after traditional structure, the operatic tunes is the structure of sealing, is provided with passive sound location after the utility model in the operatic tunes.
In conjunction with Fig. 1 and Fig. 2, in the rear operatic tunes of the utility model loud speaker module, passive sound location is set, passive sound location comprises two passive radiators: passive radiator 51 and passive radiator 52.Passive radiator 51 and the structure of passive radiator 52 for be arrangeding in parallel, two passive radiators are oppositely arranged, and surround a cavity between passive radiator 51 and passive radiator 52.The passive radiator 51 of the present embodiment and passive radiator 52 are identical structure, but are not limited to this identical structure.When the sound wave that initiatively in sound source, vibrating diaphragm 21 rear sides (near magnetic circuit system one side) produce flow to passive sound location, be passed to respectively passive radiator 51 and passive radiator 52 side (deviating from a side of cavity) away from the other side, be that air-flow is divided into two parts, be passed to respectively the upside of passive radiator 51 and the downside of passive radiator 52, air in the cavity between two passive radiators be extruded by the phonate hole of passive sound location and be communicated to the external world.This structure that passive radiator is set in the rear operatic tunes, can make full use of the space of the rear operatic tunes, and the sound wave after utilizing in the operatic tunes makes passive radiator vibration sounding, produces bass, thereby has promoted the bass effect of whole module.
Wherein, passive radiator 51 and passive radiator 52 comprise vibrating diaphragm body and are combined in the mass on vibrating diaphragm body, vibrating diaphragm body position flexible material, and mass is generally heavier metal material.As shown in Figure 3, concrete, passive radiator 51 comprises vibrating diaphragm body 510 and mass 511, and passive radiator 52 comprises vibrating diaphragm body 520 and mass 521.Wherein, the material of vibrating diaphragm body 510 and vibrating diaphragm body 520 is thermoplastic polyurethane, and this material damping effect is better.On vibrating diaphragm body, connexus gauge block can increase the weight of passive radiator, strengthens supper bass effect.
Because loud speaker module internal space is less, be specially space in the rear operatic tunes less, preferred, mass 511 and mass 521 adopt the tungsten alloy material that density is larger, thus while making mass thinner, passive radiator can reach required weight.Preferably, between the vibrating diaphragm body in passive radiator 51 and passive radiator 52 and mass, by the mode secure bond of glue spraying, on vibrating diaphragm body, after glue spraying, mass is incorporated on the vibrating diaphragm body that sprayed glue.Adopt this combination can ensure firmly combination between vibrating diaphragm body and mass, and glue-line is thinner does not need to take too many space.
In addition, preferred, mass 511 and mass 521 adopt hardness larger, and the tungsten steel alloy of heat-and corrosion-resistant.
Except above-mentioned material, can adopt the more excellent tungsten nickel and stainless steel alloy of decay resistance, evidence, this material is more difficult to the oxidation that is corroded in hot and humid and salt mist environment, and stability is high.
Preferably, the upside of vibrating diaphragm body and downside are all in conjunction with identical mass, be that the upside of vibrating diaphragm body 510 and downside are all in conjunction with a mass 511, the upside of vibrating diaphragm body 520 and downside are all in conjunction with a mass 521, and this structure can make the vibration of passive radiator equilibrium in the situation that ensureing passive radiator weight.But be not limited to said structure, according to the requirement of product centering bass effect, can be only at upside or the downside of vibrating diaphragm body 510, and the upside of vibrating diaphragm body 520 or downside connexus gauge block.
The mass that adopts above-specified high density material, makes mass not need to have very large volume and can reach required weight, thus the further bass effect of improving product certain in loud speaker module internal space in the situation that.
In addition, vibrating diaphragm body comprises the smooth ball top that is positioned at center and the ring portion that is certain cambered surface that is positioned at edge, the passive radiator 51 of the present embodiment is consistent with the bending direction of the ring of passive radiator 52, can ensure the consistency of two passive radiators, but is not limited to this structure.
As shown in Figure 1, the rear operatic tunes of loud speaker module is mainly surrounded by mesochite 12 and lower casing 13.Passive radiator 51 and passive radiator 52 are all combined on the boss of mesochite 12, as shown in figures 1 and 3, surround an independently internal cavities by mesochite 12, passive radiator 51 and passive radiator 52, this internal cavities is only communicated with the phonate hole of passive sound location by two phonocatheters, thereby realizes and extraneous being communicated with.Equally, in order to make full use of the space of loud speaker module, on mesochite 12, just the position of passive radiator 51 is injected with to sheet metal 121, on same lower casing 13, just the position of passive radiator 52 is injected with to injection moulding sheet metal 131, this structure at passive radiator 51 and the larger position injection moulding sheet metal of passive radiator 52 Oscillation Amplitudes can increase the height (space) of correspondence position, for the vibration of two passive radiators provides enough spaces, thereby can ensure the acoustical behavior of loud speaker module.
Fig. 3 is that loud speaker module removes the stereogram after upper casing 11, as shown in the figure, between the mesochite 12 of loud speaker module and upper casing 11, form the phonate hole 20 of passive sound location, as shown in Figure 3, in order clearly to show structure and the position of passive sound location phonate hole 20, in figure, upper casing 11 does not show.Passive sound location phonate hole 20 is positioned at the initiatively both sides of sound source phonate hole 10, is the separated initiatively structure of the phonate hole 10 of sound source that is independent of.Two passive sound location phonate holes 10 are also respectively independently structure, and the sound wave that passive radiator produces is divided into two parts and is radiated the external world from two passive sound location phonate holes 20.
Describe according to the loud speaker module the utility model proposes in the mode of example above with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the loud speaker module proposing for above-mentioned the utility model, can also on the basis that does not depart from the utility model content, make various improvement.Therefore, protection range of the present utility model should be determined by the content of appending claims.