CN214851818U - Moving-magnetic loudspeaker and sound equipment - Google Patents

Abstract

The utility model discloses a move magnetic loudspeaker, include: a basin frame, drum paper and an excitation coil; the basin frame has the chamber that holds, and excitation coil and the middle part fixed connection of basin frame produce magnetic field after the excitation coil circular telegram, and drum paper locates the inside that holds the chamber, and the middle part of drum paper sets up with the middle part interval of basin frame, is equipped with the magnetic part with the magnetic field interact of excitation coil on the middle part of drum paper. Design more than adopting, through set up the magnetic part on the drum paper, this magnetic part sets up with the excitation coil interval, need not to consider the problem in magnetic gap during production, it is simpler to make production technology, it is more convenient to assemble, and can adopt the production of automation equipment, promote production efficiency, and the reduction in production cost, and the wire rod can adopt the great wire rod of diameter in order to reach required resistance value, with power amplifier circuit matching, promote the output of speaker, and can promote magnetic field around more turns, thereby promote the power sensitivity of speaker, drum paper is driven by the magnetic part simultaneously, its light in weight, response frequency is better.

Description

Moving-magnetic loudspeaker and sound equipment

Technical Field

The utility model relates to an electroacoustic transducer technical field especially relates to a move magnetic loudspeaker and stereo set.

Background

Acoustic horns are also known as moving coil speakers, or dynamic speakers. The working principle is that according to Faraday's law, when a current-carrying conductor passes through a magnetic field, the current-carrying conductor is subjected to a magnetic field force, the direction of the magnetic field force accords with Fleming's left-hand rule, the force is perpendicular to the direction of the current and the direction of the magnetic field, and the force is in direct proportion to the current, the length of a lead and the magnetic flux density. When the voice coil inputs alternating audio current, the voice coil in the magnetic field generates alternating motion by an alternating driving force to drive the cone to vibrate and repeatedly drive air to produce sound.

The voice coil of the existing loudspeaker is arranged in the magnetic gap of the magnetic steel, and is pushed by a fixed magnetic field, and pushes the drum paper to make a sound. When the loudspeaker is designed, the voice coil of the moving-coil loudspeaker is required to have small resistance and light weight, the magnetic steel is required to have a strong magnetic field, the magnetic field of the magnetic steel is influenced by the size of the magnetic gap, the larger the magnetic gap is, the larger the magnetic resistance is, the smaller the effective magnetic field of the magnetic steel is, the smaller the magnetic gap is, the larger the effective magnetic field of the magnetic steel is, the larger the force for pushing the voice coil is, the higher the sensitivity of the loudspeaker is, therefore, the magnetic gap of the magnetic steel is designed to be smaller, the resistance of the voice coil is influenced by the diameter of a lead, the larger the diameter of the lead is, the smaller the resistance is, the heat generation during working is small, the bearing power of the voice coil is increased, but the weight of the voice coil of the loudspeaker is also increased, after the vibration series is increased, the frequency response is deteriorated, and the thickness of the manufactured voice coil is increased, so that the voice coil cannot be placed in the magnetic gap; therefore, a lead with a smaller diameter can be adopted in the prior art, so that the voice coil resistor is large, the heat is easy to generate and burn out, the power is limited by the voice coil resistor and is smaller, the power sensitivity of the loudspeaker is reduced (the sound can be reduced), and meanwhile, when the loudspeaker is installed, the voice coil cannot touch the magnetic steel, so that the difficulty of the installation process of the loudspeaker is large. The design is complex; this is a contradiction in the design of moving-coil speakers and is difficult to be considered at the same time. The prior art also makes the resistance of the voice coil smaller by changing the material of the conducting wire, which undoubtedly leads to the increase of the production cost of the loudspeaker.

Accordingly, there is a need for a moving magnet speaker and audio system that solves one or more of the problems set forth above.

SUMMERY OF THE UTILITY MODEL

For solving one or more problems that exist among the prior art, the utility model provides a move magnetic loudspeaker, a serial communication port, include: a basin frame, drum paper and an excitation coil; the basin frame has and holds the chamber, excitation coil with the middle part fixed connection of basin frame, excitation coil circular telegram back produces magnetic field, drum paper is located hold the inside in chamber, the middle part of drum paper with the middle part interval of basin frame sets up, be equipped with on the middle part of drum paper with the magnetic field interact's of excitation coil magnetism spare.

In a preferred embodiment, the magnetic member is a high magnetic energy product magnet.

In a preferred embodiment, the high magnetic energy product magnet is made of a rare earth material.

In a preferred embodiment, the thickness of the magnetic member is less than or equal to 0.5 mm.

In a preferred embodiment, the magnetic member and the drum paper are of an integral structure.

In a preferred embodiment, the basin frame is horn-shaped, the drum paper is horn-shaped, the edge of the drum paper is fixedly connected with the edge of the basin frame, and a small hole is reserved in the center of the basin frame.

In a preferred embodiment, the voice coil is placed at the bottom of the center of the frame, at a distance from the magnetic member so as not to touch the coil when the magnetic member vibrates up and down.

In a preferred embodiment, the middle part of the basin frame is also provided with a through hole, and one end of the through hole, which is far away from the magnetic part, is provided with damping paper.

Another aspect of the present invention is to disclose a sound system, comprising at least one of the moving-magnet speakers described in any of the above embodiments.

The utility model has the advantages that: compared with the prior art, the utility model discloses a set up the magnetic part on the drum paper, this magnetic part sets up with the excitation coil interval, need not to consider the problem in magnetic gap during production, and then make production technology simpler, it is more convenient to assemble, and can adopt automated equipment production, promote production efficiency, and the production cost is reduced, and because the problem in magnetic gap is solved, the diameter of wire rod also need not harsh consideration, can adopt the great wire rod of diameter in order to reach required resistance value, and match with power amplifier circuit, promote the output of speaker, and can promote the magnetic field that alternating current produced around more turns, thereby promote the power sensitivity of speaker, drum paper is driven by the magnetic part simultaneously, and the magnetic part can set into thinner slice, make its weight lighter, response frequency is better.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

In the figure:

1. a basin stand; 12. drum paper; 13. a field coil; 14. a magnetic member; 15. a through hole; 16. damping paper.

Detailed Description

In order to make the above objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1, the utility model provides a moving-magnet loudspeaker, its characterized in that includes: the device comprises a basin frame 1, drum paper 12 and an excitation coil 13; the basin frame 1 is provided with an accommodating cavity, the excitation coil 13 is fixedly connected with the middle part of the basin frame 1, the excitation coil 13 generates a magnetic field after being electrified, the drum paper 12 is arranged inside the accommodating cavity, the middle part of the drum paper 12 and the middle part of the basin frame 1 are arranged at intervals, and a magnetic part 14 which interacts with the magnetic field of the excitation coil 13 is arranged on the middle part of the drum paper 12; when the alternating audio current is not input to the excitation coil 13, the excitation coil 13 does not generate a magnetic field, the magnetic member 14 on the drum paper 12 is still without being acted by force, when the alternating audio current is input, the excitation coil 13 generates a magnetic field with the same frequency and the same size as the alternating audio current, and the magnetic field of the excitation coil 13 acts on the magnetic member 14 on the drum paper 12 to generate magnetic attraction or magnetic repulsion, so that the magnetic member 14 is driven to make corresponding movement, the drum paper 12 is driven to move, and the drum paper 12 pushes the medium (air) to form sound which can be heard by human ears.

It can be understood, through set up the magnetic part on the drum paper, this magnetic part sets up with excitation coil interval, need not to consider the problem in magnetic gap during production, and then make production technology simpler, it is more convenient to assemble, and can adopt automated equipment production, promote production efficiency, reduction in production cost, and because the problem in magnetic gap is solved, the diameter of wire rod also need not harsh consideration, can adopt the great wire rod of diameter in order to reach required resistance value, and match with power amplifier circuit, promote the output of speaker, and can promote magnetic field around more turns, thereby promote the power sensitivity of speaker, drum paper is driven by the magnetic part simultaneously, and the magnetic part can set into thinner slice, make its weight lighter, response frequency is better.

Further, the basin frame 1 and the drum paper 12 are both horn-shaped, the edge of the drum paper 12 is fixedly connected with the edge of the basin frame 1, and the middle of the drum paper 12 and the middle of the basin frame 1 are arranged at intervals, so that the magnetic part 14 and the excitation coil 13 are arranged at intervals.

Furthermore, the basin frame and the drum paper form a sealed cavity, and a small hole is reserved at the bottom of the basin cavity for tuning in order to prevent the sealed cavity from forming resonance.

Further, in the present embodiment, the magnetic member 14 is a high magnetic energy product magnet.

Furthermore, the magnet with high magnetic energy product is made of rare earth material.

Specifically, the magnetic member 14 is made of neodymium-iron-boron alloy material in rare earth material, the magnetic energy product of the magnet is larger than that of samarium-cobalt magnet, lead-nickel-cobalt magnet and ferrite magnet, and the magnet is the substance with the largest magnetic energy product density all over the world at that time, so that the magnetic member can have larger magnetism even if the volume is smaller.

Further, in this embodiment, the thickness of the magnetic member 14 is less than or equal to 0.5mm, specifically, the magnetic member 14 is a neodymium iron boron magnet, which can be cut to a thickness of 0.5mm or less technically, so that the thickness of the magnetic member is thinner, the weight of the magnetic member is lighter, and when the vibration is large, the inertia is low, so that the speaker has better frequency response; the process is simple, and the loudspeaker with a smaller or larger diameter can be designed according to the use scene.

It should be noted that the exciting coil 13 is fixed, that is, it is not moved under the interaction with the magnetic member 14, and because the exciting coil 13 and the magnetic member 14 are separately arranged, a thicker copper wire and a larger number of turns can be used to make the coil generate a stronger magnetic field to drive the magnetic member under the same power, so that the power sensitivity of the speaker is better and the efficiency is higher, and because the wire diameter is large, the resistance is small, the heat generation is low, and there is no need to worry about the burning out due to overheating.

Further, in this embodiment, still be equipped with through-hole 15 on the middle part of basin frame 1, one of through-hole 15 deviates from magnetic part 14 serves and is equipped with damping paper 16, when magnetic part 14 reciprocating motion, the air that drives in the basin frame 1 flows out basin frame 1 through the through-hole, and bring external air into basin frame 1 in, thereby realize dispelling the heat to excitation coil 13, it has damping paper 16 to paste on one of through-hole 15 deviation magnetic part 14 simultaneously, damping paper 16 is called the tuning paper again, this damping paper 16 has the damping effect to the sound wave, gradually ripples to the suppression sound, it has better effect to improve the sound frequency characteristic, and enable magnetic part 14 to have better response frequency, can also prevent materials such as external dust from getting into excitation coil simultaneously.

The embodiment also discloses a sound box which comprises at least one moving magnetic loudspeaker in any one of the above embodiments.

To sum up, the utility model discloses a set up the magnetic part on the drum paper, this magnetic part sets up with the excitation coil interval, need not to consider the problem in magnetic gap during production, and then make production technology simpler, it is more convenient to assemble, and can adopt automated equipment to produce, promote production efficiency, and the reduction in production cost, and because the problem in magnetic gap is solved, the diameter of wire rod also need not to consider, can adopt the great wire rod of diameter in order to reach required resistance value, and match with power amplifier circuit, promote the output of speaker, and can promote magnetic field around more turns, thereby promote the power sensitivity of speaker, drum paper is driven by the magnetic part simultaneously, and the magnetic part can set into thinner slice, make its weight lighter, response frequency is better.

The above examples merely represent one or more embodiments of the present invention, which are described in detail and concrete, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A moving-magnet speaker, comprising: the device comprises a basin frame, drum paper, an excitation coil and a magnetic part; the basin frame has and holds the chamber, excitation coil with the middle part fixed connection of basin frame, excitation coil circular telegram back produces magnetic field, drum paper is located hold the inside in chamber, the middle part of drum paper with the middle part interval of basin frame sets up, the magnetism spare is located the middle part of drum paper, the magnetism spare with excitation coil is corresponding, and with excitation coil's magnetic field interact.

2. The moving-magnet loudspeaker according to claim 1 wherein the magnetic member is a high magnetic energy product magnet.

3. The moving-magnet loudspeaker according to claim 2 wherein the high product magnet is made of a rare earth material.

4. The moving-magnet loudspeaker according to claim 3 wherein the thickness of the magnetic member is less than or equal to 0.5 mm.

5. The moving-magnet loudspeaker according to claim 1 wherein the magnetic member is of unitary construction with the drum paper.

6. The moving-magnet loudspeaker according to claim 1 wherein the frame is horn-shaped, the drum paper is horn-shaped, and the edge of the drum paper is fixedly connected with the edge of the frame.

7. The moving-magnet loudspeaker according to claim 1 wherein the middle of the frame is further provided with a through hole, and one end of the through hole facing away from the magnetic member is provided with damping paper.

8. A sound unit, characterized in that it comprises at least one loudspeaker according to any one of claims 1-7.

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