CN208317004U - A kind of coil-moving speaker - Google Patents

Abstract

The utility model provides a kind of coil-moving speaker, metal layer is closed by the sputter on the magnetic conduction bottom plate of magnetic circuit system or silk-screen, since closure metal layer can be generated induced current by the electromagenetic wave radiation of the loudspeaker voice coil to alive, and input to the induced current that will increase closure metal layer that increases of voice coil signal frequency, this induced current can be consumed gradually in the form of thermal energy, so that the electric current on voice coil correspondingly increases to maintain induced current, to which output frequency of the loudspeaker in high frequency is increase accordingly, frequency response range increases, transient response is more preferable, reduce distortion, promote loudspeaker tonequality, simultaneously because the closure metal layer of sputter or silk-screen is very thin, the vibration of voice coil is not influenced, it will not be broken or fall off, it is advantageously implemented the micromation of loudspeaker.

Description

A kind of coil-moving speaker

Technical field

The utility model relates to electro-acoustic transducer device technical fields, more particularly to a kind of coil-moving speaker.

Background technique

Coil-moving speaker belongs to one kind of loudspeaker, and the structure of coil-moving speaker includes vibrational system and magnetic circuit system System, principle of sound are as follows: the magnetic circuit system of loudspeaker constitutes annular magnetic gap, is covered with uniform magnetic field therebetween, voice coil is in magnetic gap In, when voice coil is filled with electric current, due to the influence of Ampere force, voice coil is vibrated up and down, and the size of Ampere force F is F=BILsin α, In, B is magnetic induction intensity, and I is size of current, and α is the angle between current direction and magnetic direction in voice coil, voice coil and vibration Film connection, since voice coil vibrations drive diaphragm oscillations, diaphragm oscillations drive air vibration, generate sound, and whole process is electricity- The conversion of power-sound.

In the prior art, when diaphragm oscillations, as voice coil input signal frequency increases, since the high frequency of vibrating diaphragm divides spy Property, the amplitude very little of vibrating diaphragm, high frequency output weakens, and the decrease of high frequency has a significant impact to sound quality.

Utility model content

The purpose of the utility model is to provide a kind of coil-moving speakers, on the magnetic conduction bottom plate in the magnetic circuit of loudspeaker Sputter or silk-screen are closed metal layer, electric current on voice coil when playing the role of increasing high frequency, thus improve diaphragm of loudspeaker amplitude and Frequency response range improves sound quality of the conventional loudspeakers in high frequency.It solves the problems, such as to be conventional moving-coil type loudspeaker in high frequency When, the problem of frequency dividing movement of vibrating diaphragm is obvious and its amplitude very little, frequency response range become smaller, and loudspeaker tonequality is deteriorated.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A kind of coil-moving speaker, which is characterized in that the coil-moving speaker includes vibrational system and magnetic circuit system；Institute Stating vibrational system includes composite material vibrating diaphragm, and is connected to the voice coil of composite material vibrating diaphragm lower surface；The voice coil is set It sets in the magnetic gap that magnetic circuit system is formed；The magnetic circuit system includes magnetic inductive block, magnet, magnetic conduction bottom plate, closure metal layer；Institute It states closure metal layer to be arranged on the magnetic conduction bottom plate, be located at below voice coil, it is corresponding with voice coil.

Using the above structure, in voice coil when curent change, induced current will be generated on closure metal layer, when input is believed When number frequency increases, induced current will increase and be shed with form of heat, due to input power be it is fixed, at this time on voice coil Electric current will increase to maintain the induced current on closure metal layer.

Closure metal layer corresponds to voice coil, convenient for generating electric current because of magnetic flux change, voice coil is arranged and is formed in magnetic circuit system Magnetic gap in, space can be saved, be conducive to loudspeaker micromation.

It advanced optimizes as the magnet includes the periphery columnar magnet and centrally located center pillar magnetic positioned at four sides Iron.

Advanced optimize for, the distribution of the magnetic pole of the periphery columnar magnet and the center pillar magnet is the upper end pole N, The lower end pole S.

Advanced optimize for, the distribution of the magnetic pole of the periphery columnar magnet and the center pillar magnet is the upper end pole S, The lower end pole N.

It advanced optimizes as the magnet includes the second annular magnetic positioned at the first annular magnet in outside and positioned inside Iron；The pole orientation of the first annular magnet and the second annular magnet is distributed along radial direction, and the first annular magnetic The pole orientation of iron and the second annular magnet is identical；There is magnetic gap between the first annular magnet and the second annular magnet, The voice coil is located in magnetic gap.

Using the above structure, by the way that two annular magnets are arranged, and the pole arrangement direction of magnet is radially to divide Cloth；At the magnetic gap of two magnet, the magnetic line of force is come out by the pole N of the second annular magnet and is directly entered first annular magnet The pole S, loss of the magnetic line of force in space is small, magnetic force beta radiation more evenly, so the effective length of voice coil stress increases, to drive The power of vibrating diaphragm also increases, and finally increases the ability that vibrating diaphragm squeezes air, improves the sound quality of loudspeaker indirectly, meanwhile, ring The setting of shape magnet is advantageously implemented the micromation of loudspeaker so that space utilization rate is higher.

Advanced optimize for, the magnetic circuit system further includes magnetic inductive block, positioned at the top of the magnet, and with the magnet It is corresponding；The magnetic conduction bottom plate is located at below the magnet；The magnetic inductive block and magnetic conduction bottom plate are all the coil-moving speakers Fetter the component of the magnetic line of force.

Using the above structure, the magnetic conduction bottom plate being arranged by the magnetic inductive block being arranged above magnet, magnet lower section, can be by magnetic The magnetic line of force that iron generates is strapped in magnetic conductive part in large quantities, is played the role of collection and is neutralized enhancing magnetic field.

It advanced optimizes as except range of the location of the described closure metal layer in the voice coil vibrations.

Using the above structure, the closure metal layer thickness is 20 microns to 50 microns, will not interfere the vibration of voice coil, have Conducive to the micromation for realizing loudspeaker.

It advanced optimizes as the magnetic conduction bottom plate is the magnetic conduction bottom plate for being closed metal layer described in sputter or silk-screen.

Using the above structure, compared with the wire coil that mechanical system is fixedly mounted, pass through the closure of sputter or silk-screen Metal layer is not easily to fall off on magnetic conduction bottom plate, is evenly distributed.

It advanced optimizes as the magnetic conduction bottom plate is equipped with an at least trap metal layer.

Using the above structure, at least a trap metal layer is capable of increasing induced current, thus in input high-frequency signal Further increase the electric current in voice coil.

It advanced optimizes as the material of the closure metal layer includes silver, copper, molybdenum, at least one of aluminium.

In conclusion the utility model has the following beneficial effects:

The utility model provides a kind of coil-moving speaker, passes through sputter or silk-screen on the magnetic conduction bottom plate of magnetic circuit system It is closed metal layer, since closure metal layer can be generated induced current by the electromagenetic wave radiation of the loudspeaker voice coil to alive, And the induced current that will increase closure metal layer that increases of voice coil signal frequency is inputed to, this induced current can be gradually with thermal energy Form consumption, so that the electric current on voice coil correspondingly increases to maintain induced current, so that loudspeaker is in high frequency Vibrating diaphragm amplitude increase, frequency response range increases, and transient response is more preferable, to reduce distortion, promotion loudspeaker tonequality, together When due to the closure metal layer of sputter or silk-screen it is very thin, will not influence the vibration of voice coil, will not be broken or fall off, be advantageously implemented The micromation of loudspeaker.

Detailed description of the invention

Fig. 1 is the main view of coil-moving speaker in one embodiment of the utility model.

Fig. 2 is the axonometric drawing of coil-moving speaker in one embodiment of the utility model.

Fig. 3 is the schematic diagram for changing magnet arrangement in another embodiment of the utility model.

Fig. 4 is the schematic diagram that the technical solution of two trap metal layers is arranged in the utility model on magnetic conduction bottom plate.

Specific embodiment

In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen The feature in embodiment and embodiment please can be combined with each other.

Many details are explained in the following description in order to fully understand the utility model, still, this is practical Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously It is not limited by the specific embodiments disclosed below.

Embodiment 1:

Referring to Figure 1 and shown in Fig. 2, coil-moving speaker includes vibrational system and magnetic circuit system, the vibrational system packet Composite material vibrating diaphragm 101 is included, and is connected to the voice coil 102 of 101 lower surface of composite material vibrating diaphragm；The setting of voice coil 102 exists In the annular magnetic gap that magnetic circuit system is formed；The magnetic circuit system includes magnet, magnetic conduction bottom plate 105 and closure metal layer 106； The magnetic conduction bottom plate 105 is mounted on magnet bottom；The closure metal layer 106 is arranged on the magnetic conduction bottom plate 105, is located at sound 102 lower section of circle, it is corresponding with voice coil 102.

Further, as shown in Fig. 2, the magnet include positioned at four sides periphery columnar magnet 104 with it is centrally located Center pillar magnet 107.

Further, the magnetic pole of the periphery columnar magnet and center pillar magnet distribution is the upper end pole N, lower end The pole S.

Further, the magnetic pole of the periphery columnar magnet and center pillar magnet distribution is the upper end pole S, lower end The pole N.

Embodiment 2:

The present embodiment is based on embodiment 1 and is further improved, and specifically, difference from Example 1 is:

As shown in figure 3, the magnet includes the second annular magnetic positioned at the first annular magnet 303 in outside and positioned inside Iron 304；The first annular magnet 303 is identical with the pole orientation of the second annular magnet 304 and is distributed all along radial direction； There is magnetic gap, the voice coil 302 and composite material vibrating diaphragm between the first annular magnet 303 and the second annular magnet 304 301 connect and are located in magnetic gap.Closure metal layer 306 is provided on magnetic conduction bottom plate 305, sound when increasing high frequency input Electric current in circle 302.

Above-mentioned magnet arrangement promotes the principle of loudspeaker sounding effect: by the way that two annular magnets, and the magnetic of magnet is arranged Pole orientation is radially distributed；At the magnetic gap of two magnet, the magnetic line of force is gone out by the pole N of the second annular magnet It is directly entered the pole S of first annular magnet, loss of the magnetic line of force in space is small, because the magnetic line of force generated around magnet is in sky It is from closely to far decaying in gas.Therefore magnetic force beta radiation is more evenly, and magnetic field strength is stronger, so voice coil stress is effective Length increases, so that the power of vibrating diaphragm be driven also to increase, finally increases the ability that vibrating diaphragm squeezes air, improves loudspeaking indirectly The sound quality of device.

Further, as shown in Figure 1 or 2, the magnetic circuit system further includes magnetic inductive block 103, positioned at the upper of the magnet It is square and corresponding with the magnet；The magnetic conduction bottom plate 105 is located at below the magnet；The magnetic inductive block and magnetic conduction bottom plate are all The component of the coil loundspeaker constraint magnetic line of force.

Magnetic inductive block and magnetic conduction bottom plate fetter magnetic line of force principle: the magnetic line of force being largely closed can be generated around magnet, these magnetic The line of force is in the inner distribution of no magnetic conduction substance (such as air) from closely to far successively change is dredged.Because a large amount of magnetic lines of force can be preferentially by having The path of magnetic conductive part, so by the magnetic inductive block being arranged above magnet, the magnetic conductive board being arranged below magnet can be sent out magnet Magnetic field out is strapped in magnetic conductive part in large quantities, is played the role of collection and is neutralized enhancing magnetic field, to enhance suffered by vibrating diaphragm Lorentz force so that the sound quality of loudspeaker is more preferable.

In one embodiment of the utility model, range of the location of the described closure metal layer in voice coil vibrations Except.

Further, the magnetic conduction bottom plate is the magnetic conduction bottom plate for being closed metal layer on surface described in sputter or silk-screen.

Further, the magnetic conduction bottom plate is equipped with an at least trap metal layer.

As shown in figure 4, sputter or silk-screen have two trap metal layers on magnetic conduction bottom plate, it is closure metal layer 401 respectively With closure metal layer 402.

Further, the material of the closure metal layer includes silver, copper, molybdenum, at least one of aluminium.

In one embodiment of the utility model, the composite material vibrating diaphragm is made of PEEK film and top dome two parts； PEEK film thickness is 30um, and described includes PEEK film, acrylic damping glue；Top dome include PET film, damping glue, foam of polymers, Damping glue, aluminium film；The composite material vibrating diaphragm overall thickness is 220um.The composite material vibrating diaphragm by vibration sounding, have than The advantage of heavy and light, is conducive to the micromation of loudspeaker, while also acting the effect of dust protection.

The utility model provides a kind of coil-moving speaker, passes through sputter or silk-screen on the magnetic conduction bottom plate of magnetic circuit system It is closed metal layer, since closure metal layer can be generated induced current by the electromagenetic wave radiation of the loudspeaker voice coil to alive, And the induced current that will increase closure metal layer that increases of voice coil signal frequency is inputed to, this induced current can be gradually with thermal energy Form consumption, so that the electric current on voice coil correspondingly increases to maintain induced current, so that loudspeaker is in high frequency Vibrating diaphragm amplitude increase, frequency response range increases, and the transient response of loudspeaker is more preferable, to reduce distortion, promotion loudspeaking Device sound quality will not influence the vibration of voice coil, will not be broken or fall off simultaneously because the closure metal layer of sputter or silk-screen is very thin, It is advantageously implemented the micromation of loudspeaker.

Above-mentioned specific embodiment is only the explanation to the utility model, is not limitations of the present invention, this Field technical staff can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, But as long as all by the protection of Patent Law in the scope of the claims of the utility model.

Claims (10)

1. a kind of coil-moving speaker, which is characterized in that the coil-moving speaker includes vibrational system and magnetic circuit system；It is described Vibrational system includes composite material vibrating diaphragm, and is connected to the voice coil of composite material vibrating diaphragm lower surface；The voice coil setting In the magnetic gap that magnetic circuit system is formed；The magnetic circuit system includes magnet, and magnetic conduction bottom plate is closed metal layer；The closure gold Belong to layer to be arranged on the magnetic conduction bottom plate, be located at below voice coil, it is corresponding with voice coil.

2. according to coil-moving speaker described in claim 1, which is characterized in that the magnet includes the periphery column positioned at four sides Magnet and centrally located center pillar magnet.

3. coil-moving speaker according to claim 2, which is characterized in that the periphery columnar magnet and the newel The magnetic pole distribution of shape magnet is the upper end pole N, the lower end pole S.

4. coil-moving speaker according to claim 2, which is characterized in that the periphery columnar magnet and the newel The magnetic pole distribution of shape magnet is the upper end pole S, the lower end pole N.

5. coil-moving speaker according to claim 1, which is characterized in that the magnet includes the first ring positioned at outside Shape magnet and the second annular magnet positioned inside；The pole orientation of the first annular magnet and the second annular magnet it is identical and It is distributed all along radial direction；There is magnetic gap, the voice coil is located between the first annular magnet and the second annular magnet In magnetic gap.

6. coil-moving speaker according to claim 1, which is characterized in that the magnetic circuit system further includes magnetic inductive block, position It is above magnet and corresponding with the magnet；The magnetic conduction bottom plate is located at below the magnet；The magnetic inductive block and the magnetic conduction Bottom plate is all the component of the coil-moving speaker constraint magnetic line of force.

7. coil-moving speaker according to claim 1, which is characterized in that the location of described closure metal layer is in sound Except range when circle vibration.

8. coil-moving speaker according to claim 7, which is characterized in that the magnetic conduction bottom plate is sputter or silk on surface Print the magnetic conduction bottom plate of the closure metal layer.

9. coil-moving speaker according to claim 7, which is characterized in that the magnetic conduction bottom plate is provided with an at least trap The magnetic conduction bottom plate of metal layer.

10. coil-moving speaker according to claim 1 to 9, which is characterized in that the closure metal layer Material includes silver, copper, molybdenum, at least one of aluminium.