CN209659587U - Loudspeaker - Google Patents

Abstract

The utility model provides a kind of loudspeaker, including vibrational system and magnetic circuit system, the vibrational system includes vibrating diaphragm, voice coil and flexible strutting piece, the magnet steel and pole piece that the magnetic circuit system includes magnetic bowl, is fixed in the magnetic bowl, magnetic gap is formed between the magnetic bowl and the magnet steel and pole piece, the pole piece includes the upper surface and the lower surface that is bonded with the magnet steel towards the vibrating diaphragm, the voice coil includes the top close to the vibrating diaphragm and the bottom end far from the vibrating diaphragm, and the upper surface is than the top close to the vibrating diaphragm.The utility model has the beneficial effects that: the thickness of the pole piece is greater than the height of the voice coil, so that voice coil is in vibration processes as much as possible in the pole piece thickness range, in the case where change of sensitivity is little, improve BLx value flatness, harmonic distortion and intermodulation distortion are reduced, so that earphone is sensitiveer.

Description

Loudspeaker

[technical field]

The utility model relates to acoustic-electric field more particularly to a kind of loudspeakers.

[background technique]

The loudspeaker of the prior art, including vibrational system and magnetic circuit system, the vibrational system include vibrating diaphragm, voice coil and soft Property circuit board, the magnetic circuit system includes magnetic bowl, the magnet steel and pole piece that are fixed in the magnetic bowl, the pole piece and the voice coil Concordantly, there are problems that harmonic distortion and intermodulation distortion, sensitivity and BLx value there are also space to be hoisted (power conversion factor with The product of voice coil displacement).

Therefore, it is necessary to provide a kind of loudspeaker that can solve harmonic distortion and intermodulation distortion.

[utility model content]

The purpose of this utility model is to provide a kind of improvement BLx values, the loudspeaker of reduction harmonic distortion and intermodulation distortion.

The technical solution of the utility model is as follows:

A kind of loudspeaker, including vibrational system and magnetic circuit system are provided, the vibrational system includes vibrating diaphragm, voice coil and flexibility Supporting element, the magnetic circuit system includes magnetic bowl, the magnet steel and pole piece that are fixed in the magnetic bowl, the magnetic bowl and the magnet steel and Forming magnetic gap between pole piece, the pole piece includes the upper surface and the lower surface that is bonded with the magnet steel towards the vibrating diaphragm, The voice coil includes the top close to the vibrating diaphragm and the bottom end far from the vibrating diaphragm, and the upper surface is than the top close to institute State vibrating diaphragm.

Preferably, the lower surface is than the bottom end far from the vibrating diaphragm.

Preferably, the flexible strutting piece is flexible circuit board, and the voice coil is electrically connected the flexible circuit board.

Preferably, the loudspeaker further includes skeleton, the skeleton be connected to the voice coil and the flexible circuit board it Between.

Preferably, the skeleton includes being fixed to the cylindrical portion of the flexible circuit board and from the cylindrical portion far from described The flange that flexible circuit board one end extends radially outwardly, the voice coil are fixedly attached to the flange.

Preferably, the loudspeaker further includes the shell for installing vibrational system and magnetic circuit system, and the vibrating diaphragm includes It is centrally located top dome, outwardly extending solid around the top dome and the interconnecting piece that is connect with the top dome and from the interconnecting piece Determine portion, the fixed part is fixedly attached to the shell.

Preferably, the interconnecting piece is recessed with cavity to the direction of vibration far from the loudspeaker, and the cavity is equipped with logical The through-hole is completely covered for hole, the top dome.

Preferably, the fixed part is annular shape, and the fixed part convexes to form convex to the direction of vibration of the loudspeaker The portion of rising.

The utility model has the beneficial effects that: the thickness of the pole piece is greater than the height of the voice coil, so that sound Circle as much as possible in the pole piece thickness range, in the case where change of sensitivity is little, improves BLx in vibration processes It is worth flatness, harmonic distortion and intermodulation distortion is reduced, so that earphone is sensitiveer.

[Detailed description of the invention]

Fig. 1 is the decomposition diagram of the utility model loudspeaker.

Fig. 2 is the combination diagram of the loudspeaker of the utility model.

Fig. 3 is the cross-sectional view in Fig. 2 along line A-A.

Fig. 4 is the partial enlarged view in Fig. 3 at circle B.

Fig. 5 is the decomposition diagram of the vibrational system of the utility model.

Fig. 6 is the decomposition diagram of the vibrating diaphragm of the utility model.

Fig. 7 is new departure of an embodiment of the present invention and the BLx curve comparison figure of prior art.

[specific embodiment]

The utility model is described in further detail with embodiment with reference to the accompanying drawing.

As shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 6, according to a kind of loudspeaker 100 that an embodiment of the present invention provides, including Shell 10, magnetic circuit system 20 and vibrational system 30, vibrational system 30 and magnetic circuit system 20 are mounted in shell 10, vibrational system 30 Including vibrating diaphragm 31, voice coil 32 and flexible strutting piece 33, flexible strutting piece 33 is flexible circuit board.Flexible circuit board 33 is located at vibrating diaphragm Between 31 and shell 10, vibrating diaphragm 31 includes centrally located top dome 311, around top dome 311 and the interconnecting piece that connect with top dome 311 312 and from the outwardly extending fixed part 313 of interconnecting piece 312, fixed part 313 is fixedly attached to shell 10.Preferably, interconnecting piece 313 are recessed with cavity 314 to the direction of vibration far from loudspeaker 100, and cavity 314 is equipped with through-hole 315, and top dome 311 is by through-hole 315 It is completely covered.Fixed part 313 is annular shape, and fixed part 313 convexes to form lug boss 316 to the direction of vibration of loudspeaker 100.Magnetic Road system 20 includes magnetic bowl 21, the magnet steel 22 and pole piece 23 being fixed in magnetic bowl 21, is existed between magnetic bowl 21 and pole piece 23 radial Gap, voice coil 32 are located in the radial clearance.

With reference to Fig. 3 and Fig. 4, it is preferable that pole piece 23 includes being bonded down towards the upper surface of vibrating diaphragm 31 231 and with magnet steel 22 Surface 232, voice coil 32 include top 321 and bottom end 322 along short transverse.Top of the upper surface 231 of pole piece 23 than voice coil 32 321 close to vibrating diaphragm 31.Preferably, technical solution provided by the utility model includes: the upper surface 231 of pole piece 23 beyond voice coil 32 Top 321 and pole piece 23 lower surface 232 beyond voice coil 32 bottom end 322 or pole piece 23 upper surface 231 exceed voice coil 32 top 321 or the lower surface 232 of pole piece 23 exceed the bottom end 322 of voice coil 32.In above scheme, the thickness of pole piece 23 It is all larger than the height of voice coil 32, voice coil 32 is always at the magnetic induction line model that pole piece 23 and magnetic bowl 21 are formed in earphone vibration processes Within enclosing, can guarantee voice coil 32 be always in earphone vibration processes magnetic induction line range that pole piece 23 and magnetic bowl 21 are formed it It is interior, so that the flatness of BLx value variation can be improved when change of sensitivity does not have significant, reduce harmonic distortion and intermodulation distortion. It is that the upper surface 231 of pole piece 23 exceeds beyond the lower surface 232 on the top 321 of voice coil 32 and pole piece 23 as a preferred option The bottom end 322 of voice coil 32, and the center line of 23 thickness direction of pole piece and the center line of 32 short transverse of voice coil are located at same put down In face, 32 both ends of voice coil are equal with the distance between 23 upper surface 231 of pole piece and lower surface 232, so that voice coil 32 is as much as possible In more uniform magnetic field range, frequency is consistent when vibration, further, improves the flatness of BLx value variation.

Fig. 7 is the BLx value curve comparison figure of the prior art and new solution provided by the utility model, wherein lines I Prior art is represented, lines II represents technical solutions of the utility model, and abscissa is voice coil displacement, and unit is millimeter, Ordinate is power conversion factor, and unit is ox/ampere.In test process, in addition to the thickness of pole piece 23 and the height ratio of voice coil 32 It is worth outside this variable, other conditions are consistent.In the prior art scheme, the height of the thickness of pole piece 23 and voice coil 32 Unanimously, in technical solutions of the utility model, the thickness of pole piece 23 is greater than the height of voice coil 32.It can be seen that from figure, in poor sensitivity Out-phase is in the case where, and the broken line fluctuation of prior art is more apparent, and the broken line of technical solutions of the utility model BLx value is relatively flat Slow, amplitude of variation is smaller.

As shown in Figure 1 and Figure 5, it is preferable that loudspeaker 100 further includes skeleton 34, and 34 one end of skeleton connects voice coil 32, another End connection flexible circuit board 33, skeleton 34 include being fixed to the cylindrical portion 341 of flexible circuit board 33 and from cylindrical portion 341 far from soft The flange 342 that property 33 one end of circuit board extends radially outwardly, voice coil 32 are fixedly attached to flange 342.The setting of skeleton 34 can be kept away Exempt from voice coil 32 and be directly fixed to flexible circuit board 33 to reduce the inefficient length of voice coil 32, so that the magnetic field for promoting voice coil 32 utilizes Rate；On the other hand, the top of voice coil 32 can be directly fixed to skeleton 34, so as to substantially reduce the broken string risk of voice coil 32, sound Circle 32 can be used thinner line coiling and form, to reduce the weight of entire vibrational system 30, promote the sensitive of loudspeaker 100 Degree.

It should be noted that in the utility model embodiment institute it is directional instruction (such as up, down, left, right, before and after, Inside and outside, top, bottom ...) it is only used for explaining in the opposite position under a certain particular pose (as shown in the picture) between each component Relationship etc. is set, if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

It should also be noted that, when an element is referred to as being " fixed " or " disposed " on another element, which can Directly on the other element or may be simultaneously present centering elements.When an element referred to as " connects " another yuan Part, it, which can be, is directly connected to another element or may be simultaneously present centering elements.

The above are merely the embodiments of the present invention, it should be noted here that for those of ordinary skill in the art For, without departing from the concept of the present invention, improvement can also be made, but these belong to the utility model Protection scope.

Claims (8)

1. a kind of loudspeaker, including vibrational system and magnetic circuit system, the vibrational system includes vibrating diaphragm, voice coil and flexible support Part, the magnetic circuit system includes magnetic bowl, the magnet steel and pole piece that are fixed in the magnetic bowl, the magnetic bowl and the magnet steel and pole piece Between form magnetic gap, the pole piece includes the upper surface and the lower surface that is bonded with the magnet steel towards the vibrating diaphragm, described Voice coil includes the top close to the vibrating diaphragm and the bottom end far from the vibrating diaphragm, which is characterized in that the upper surface is than the top It holds close to the vibrating diaphragm.

2. loudspeaker according to claim 1, it is characterised in that: the lower surface is than the bottom end far from the vibrating diaphragm.

3. loudspeaker according to claim 1, it is characterised in that: the flexible strutting piece is flexible circuit board, the sound Circle is electrically connected the flexible circuit board.

4. loudspeaker according to claim 3, it is characterised in that: the loudspeaker further includes skeleton, the skeleton connection Between the voice coil and the flexible circuit board.

5. loudspeaker according to claim 4, it is characterised in that: the skeleton includes being fixed to the flexible circuit board Cylindrical portion and the flange to extend radially outwardly from the cylindrical portion far from described flexible circuit board one end, the voice coil are fixedly connected To the flange.

6. loudspeaker according to any one of claims 1 to 3, it is characterised in that: the loudspeaker further includes for installing The shell of vibrational system and magnetic circuit system, the vibrating diaphragm include centrally located top dome, around the top dome and with the top dome The interconnecting piece of connection and from the outwardly extending fixed part of the interconnecting piece, the fixed part is fixedly attached to the shell.

7. loudspeaker according to claim 6, it is characterised in that: the interconnecting piece to far from the loudspeaker vibration side To cavity is recessed with, the cavity is equipped with through-hole, and the through-hole is completely covered the top dome.

8. loudspeaker according to claim 7, it is characterised in that: the fixed part is annular shape, and the fixed part is to institute The direction of vibration for stating loudspeaker convexes to form lug boss.