CN201594909U - Loudspeaker magnetic circuit and loudspeaker - Google Patents

Abstract

The utility model relates to a loudspeaker magnetic circuit and a loudspeaker comprising the magnetic circuit. The utility model adopts the magnetic circuit structure of double magnetic circuit gaps. The loudspeaker power is loaded on two voice coils, and the loudspeaker power bearing capability is obviously improved. Accordingly, the diameter of single voice coil is smaller, the mass is lighter, and the loudspeaker sensitivity is improved. As the two voice coils are respectively connected with the bottom and the waist of a cone, the whole cone rigidity is increased.

Description

A kind of magnetic circuit of loudspeaker and the loud speaker that comprises this magnetic circuit

Technical field

The loud speaker that the utility model relates to a kind of magnetic circuit of loudspeaker and comprises this magnetic circuit.

Background technology

In daily use, the microphone device great majority all belong to the electrodynamic type moving-coil speaker, promptly by permanent magnet (ferrite or neodymium iron boron) and permeability magnetic material (soft iron etc.), form the magnetic circuit that working gas gap is arranged, and voice coil loudspeaker voice coil is positioned at magnetic air gap.According to Faraday's law, when current when the magnetic field, can be subjected to an electric power, its direction meets not comes bright left hand rule, power and electric current, magnetic direction are orthogonal, stressed size is directly proportional with electric current, conductor length, magnetic flux density.Therefore, when passing through the alternation tone currents in the voice coil loudspeaker voice coil, voice coil loudspeaker voice coil is subjected to the effect of alternation motive force to carry out alternate motion, drives the cone vibration, promotes air repeatedly and sounding.

Fig. 1 is the profile of existing external magnetic type loud speaker, wherein shows a kind of magnetic structure.

As shown in Figure 1, magnetic circuit of loudspeaker is made up oftrain wheel bridge 2,T iron 4 and toroidal coils 3.A toroid air gap is formed between the pole piece post oftrain wheel bridge 2,magnet 3 andT iron 4, and voice coilloudspeaker voice coil 1 is suspended in this toroid air gap and with vibrating diaphragm and is connected.Voice coil loudspeaker voice coil by the alternation tone currents moves owing in the magnetic field that acts on the toroid air gap in magnetic field, and the vibrating diaphragm that links to each other with voice coil loudspeaker voice coil is vibration thereupon also, by air dielectric sound wave is sent out again.

For the magnetic structure of this traditional outer-magnet speaker,,, its power bearing ability is limited to so its whole input powers all are carried on this voice coil loudspeaker voice coil because one magnetic air gap can only hold a voice coil loudspeaker voice coil; Correspondingly, if improve power bearing ability, then need to improve the voice coil loudspeaker voice coil radius, this is a cost to sacrifice sensitivity; In addition, because the actuating force that voice coil loudspeaker voice coil motion produces acts on the root of cone, thus rigidity deficiency when making the cone motion, extreme prematurity is estranged easily cuts vibration.

The utility model content

The loud speaker that the utility model provides a kind of magnetic circuit of loudspeaker that can overcome the above problems and comprised this magnetic circuit.

In first aspect, the utility model provides a kind of magnetic circuit of loudspeaker, it is characterized in that comprising first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, between described first train wheel bridge, described second train wheel bridge, described first magnet, described second magnet and described T iron, form first magnetic air gap, between described second train wheel bridge, described first magnet and described T iron, form second magnetic air gap.

In second aspect, the utility model provides a kind of loud speaker, it is characterized in that comprising vibrating diaphragm, first voice coil loudspeaker voice coil, second voice coil loudspeaker voice coil, first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, at described first train wheel bridge, described second train wheel bridge, described first magnet, form first magnetic air gap between described second magnet and the described T iron, at described second train wheel bridge, form second magnetic air gap between described first magnet and the described T iron, described first voice coil loudspeaker voice coil is suspended in first magnetic air gap and with described vibrating diaphragm waist and is connected, described second voice coil loudspeaker voice coil is suspended in second magnetic air gap and with described vibrating diaphragm bottom and is connected, the vibration when energising of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil is to drive the vibrating diaphragm sounding.

In the third aspect, the utility model provides a kind of coaxial loudspeaker, it is characterized in that comprising the bass cone, the high frequency audio film, first voice coil loudspeaker voice coil, second voice coil loudspeaker voice coil, first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, at described first train wheel bridge, described second train wheel bridge, described first magnet, form first magnetic air gap between described second magnet and the described T iron, at described second train wheel bridge, form second magnetic air gap between described first magnet and the described T iron, described first voice coil loudspeaker voice coil is suspended in first magnetic air gap and with described bass cone and is connected, described second voice coil loudspeaker voice coil is suspended in second magnetic air gap and with described high frequency audio film and is connected, the vibration when energising of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil is to drive the vibrating diaphragm sounding.

The utility model is by having adopted the structure of double magnetic circuit air gap, and the power of loud speaker is carried on two voice coil loudspeaker voice coils, has significantly improved the power bearing ability of loud speaker; Correspondingly, the diameter of single voice coil loudspeaker voice coil is less, lighter weight, the sensitivity that has improved loud speaker; Because two voice coil loudspeaker voice coils are connected with waist with the bottom of cone respectively, have strengthened the cone whole rigidity.

Description of drawings

Below with reference to accompanying drawings specific embodiments of the present utility model is described in detail, in the accompanying drawings:

Fig. 1 is the profile of existing external magnetic type loud speaker.

Fig. 2 is the profile according to external magnetic type loud speaker of the present utility model.

Fig. 3 is the profile according to coaxial loudspeaker of the present utility model.

Embodiment

Fig. 2 is the profile according to external magnetic type loud speaker of the present utility model.

As shown in Figure 2, this loud speaker comprises a kind of magnetic structure of double magnetic circuit air gap.This magnetic circuit comprisestrain wheel bridge 12,train wheel bridge 21,magnet 13,magnet 23, T iron 4.A toroid air gap is formed between the pole piece post and magnet oftrain wheel bridge 21,T iron 4, and voice coil loudspeaker voice coil is arranged in this toroid air gap and is connected with the cone bottom; A toroid air gap is formed betweentrain wheel bridge 12,train wheel bridge 21 andmagnet 13 and themagnet 23, and voice coilloudspeaker voice coil 21 is arranged in this toroid air gap and is connected with the cone waist.

After voice coilloudspeaker voice coil 11 fed the alternation tone currents, voice coilloudspeaker voice coil 11 produced alternating magnetic field under the effect of alternation tone currents, and its size and Orientation constantly changes with the variation of tone currents.Simultaneously,magnet 13,23 also produces a size and the constant stationary magnetic field of direction.Under the interaction in such two magnetic fields, voice coil loudspeaker voice coil carries out alternate motion with the direction perpendicular to the electric current in the voice coil loudspeaker voice coil and the magnet magnetic line of force in the toroid air gap.Because cone (vibrating diaphragm) bottom is connected with voice coil loudspeaker voice coil, thereby vibrates under the drive of voice coil loudspeaker voice coil.

In like manner, after voice coilloudspeaker voice coil 21 fed the alternation tone currents, voice coilloudspeaker voice coil 21 produced alternating magnetic field under the effect of alternation tone currents, and its size and Orientation constantly changes with the variation of tone currents.Simultaneously,magnet 2 also produces a size and the constant stationary magnetic field of direction.Under the interaction in such two magnetic fields, voice coil loudspeaker voice coil carries out alternate motion with the direction perpendicular to the electric current in the voice coil loudspeaker voice coil and the magnet magnetic line of force in the toroid air gap.Because cone (vibrating diaphragm) waist is connected with voice coilloudspeaker voice coil 21, thereby vibrates under the drive of voice coil loudspeaker voice coil.

Fig. 3 is the profile according to coaxial loudspeaker of the present utility model.

As shown in Figure 3, this coaxial loudspeaker comprisestrain wheel bridge 12,train wheel bridge 22,magnet 13,magnet 23,T iron 4,bass cone 8, high frequency audio film 9.A toroid air gap is formed between the pole piece post and magnet oftrain wheel bridge 22,T iron 4, and voice coilloudspeaker voice coil 11 is arranged in this toroid air gap and is connected with highfrequency audio film 9; A toroid air gap is formed betweentrain wheel bridge 12,train wheel bridge 22 andmagnet 13 and themagnet 23, and voice coilloudspeaker voice coil 21 is arranged in this toroid air gap and is connected withbass cone 8.

Its operation principle is similar to the described loud speaker of Fig. 2, therefore repeats no more.

The utility model has been by having adopted the magnetic structure of double magnetic circuit air gap, and the power of loud speaker is carried on two voice coil loudspeaker voice coils, significantly improved the power bearing ability of loud speaker; Correspondingly, the diameter of single voice coil loudspeaker voice coil is less, lighter weight, the sensitivity that has improved loud speaker; Because two voice coil loudspeaker voice coils are connected with waist with the bottom of cone respectively, have strengthened the cone whole rigidity.

Obviously, under the prerequisite that does not depart from true spirit of the present utility model and scope, the utility model described here can have many variations.Therefore, the change that all it will be apparent to those skilled in the art that all should be included within the scope that these claims contain.The utility model scope required for protection is only limited by described claims.

Claims (3)

1. magnetic circuit of loudspeaker, it is characterized in that comprising first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, between described first train wheel bridge, described second train wheel bridge, described first magnet, described second magnet and described T iron, form first magnetic air gap, between described second train wheel bridge, described first magnet and described T iron, form second magnetic air gap.

2. loud speaker, it is characterized in that comprising vibrating diaphragm, first voice coil loudspeaker voice coil, second voice coil loudspeaker voice coil, first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, at described first train wheel bridge, described second train wheel bridge, described first magnet, form first magnetic air gap between described second magnet and the described T iron, at described second train wheel bridge, form second magnetic air gap between described first magnet and the described T iron, described first voice coil loudspeaker voice coil is suspended in first magnetic air gap and with described vibrating diaphragm waist and is connected, described second voice coil loudspeaker voice coil is suspended in second magnetic air gap and with described vibrating diaphragm bottom and is connected, the vibration when energising of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil is to drive the vibrating diaphragm sounding.

3. coaxial loudspeaker, it is characterized in that comprising the bass cone, the high frequency audio film, first voice coil loudspeaker voice coil, second voice coil loudspeaker voice coil, first train wheel bridge, second train wheel bridge, first magnet, second magnet, T iron, wherein, at described first train wheel bridge, described second train wheel bridge, described first magnet, form first magnetic air gap between described second magnet and the described T iron, at described second train wheel bridge, form second magnetic air gap between described first magnet and the described T iron, described first voice coil loudspeaker voice coil is suspended in first magnetic air gap and with described bass cone and is connected, described second voice coil loudspeaker voice coil is suspended in second magnetic air gap and with described high frequency audio film and is connected, the vibration when energising of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil is to drive the vibrating diaphragm sounding.

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