CN211656366U - High-sensitivity loudspeaker - Google Patents

Abstract

The utility model discloses a high-sensitivity loudspeaker, comprising a vibration system, a magnetic circuit system and a bracket, and is characterized in that more than one vibration system is arranged on the same magnetic circuit system and the bracket, thereby increasing the vibration area of the loudspeaker by no less than 60% and improving the sensitivity by at least 3dB.

Description

a high-sensitivity speaker

technical field

The present invention relates to the field of electro-acoustic transducers, in particular to loudspeakers capable of improving sensitivity in a limited size.

Background technique

The working principle of traditional moving coil loudspeaker is shown in Figure 1. Including magnetic circuit system, vibration system and bracket.

The magnetic circuit system consists of T iron 71 , magnet 61 and washer 51 , and forms a magnetic gap 91 .

The vibration system includes: the voice coil 31 is placed in the magnetic gap 91. When the voice coil 31 has a current passing through it, it vibrates under the action of a magnetic field, and drives the diaphragm 11 to vibrate and sound. The suspension edge 21 and the elastic wave 41 are the voice coil 31 and the vibration The membrane 11 provides a supporting force, and the dust cover 21 is mainly used to prevent flying dust from entering the magnetic gap 91 .

The spring wave 41 and the hanging edge 21 are fixed on the bracket 81 .

With the enhancement of portability of smart devices, loudspeakers are required to be smaller in size but higher in performance. Traditional speakers have been difficult to meet the requirements. The requirement before the developer was to increase the output sensitivity of the loudspeaker while keeping the size as small as possible.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a loudspeaker which can improve the sensitivity under a specific size condition.

The technical scheme adopted in the present invention is:

A high-sensitivity loudspeaker, comprising a magnetic circuit system, a vibration system and a bracket, is characterized in that: in the same set of magnetic circuit system, two inner and outer magnetic gaps are arranged, and two independent voice coils are respectively arranged, among which the smaller-sized sound coil is arranged. The coil is connected to the diaphragm and the elastic wave arranged on the front of the speaker, the diaphragm is connected to the suspension edge, and the suspension edge and the elastic wave are fixed on the bracket; The second diaphragm is connected with the second suspension edge, and the second suspension edge is fixed on the bracket; the sound emitted by the second diaphragm is transmitted to the front of the speaker through the hole in the center of the magnetic circuit system.

Another technical solution of the present invention is:

A high-sensitivity loudspeaker, comprising a magnetic circuit system, a vibration system and a bracket, is characterized in that: two vibrating membranes arranged up and down in a concentric shape are provided, the voice coil is connected with the first and second vibrating membranes, the first vibrating membrane is The membrane is connected with the first suspension edge, the second vibration membrane is connected with the second suspension edge, and the first and second suspension edges are respectively fixed on the bracket; between the first and second vibration membranes, a Two baffles, the first baffle divides the space between the first and second diaphragms into two parts, the second baffle and the first baffle form a channel; the first diaphragm and the The space between the first baffles communicates with the space on the back of the speaker through the channel; the space between the second diaphragm and the first baffle communicates with the space on the front of the speaker through the channel.

The beneficial effect of the invention is that the sensitivity of the loudspeaker with the same diameter is improved by no less than 3dB.

Description of drawings

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of a conventional loudspeaker.

FIG. 2 is a schematic structural diagram of the implementation of the high-sensitivity loudspeaker of the present invention.

3 and 4 are schematic structural diagrams of other two embodiments of the high-sensitivity loudspeaker of the present invention.

Detailed ways

The concept, structure and technical effect of the present invention will be fully described below with reference to the embodiments and accompanying drawings. The described embodiments are only a part of the embodiments of the present invention, and other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in Figure 2, a high-sensitivity speaker, magnetic circuit system, vibration system and bracket.

The magnetic circuit system consists of T iron 71, magnet 61 and U cup 52, and two magnetic gaps 91 and 92 are formed. The magnetic gap 91 is located in the center of the magnet 61 , and the magnetic gap 92 is located outside the magnet 61 .

The vibration system 1 includes a diaphragm 11 , a suspension edge 21 , a voice coil 31 and a spring wave 41 . The voice coil 31 is located in the magnetic gap 91. When the voice coil 31 conducts electricity, it vibrates under the action of the magnetic field force, which drives the diaphragm 11 to vibrate and produce sound. The suspension edge 21 and the spring wave 41 are fixed on the bracket 81 to provide supporting force.

The vibration system 2 includes a diaphragm 13 , a suspension edge 22 and a voice coil 32 . The voice coil 32 is located in the magnetic gap 92. When the voice coil 32 conducts electricity, it is vibrated by the force of the magnetic field, which drives the diaphragm 13 to vibrate and produce sound. The hanging edge 22 is fixed on the bracket 82 to provide supporting force.

Compared with the traditional loudspeaker (as shown in FIG. 1 ), the present invention has two diaphragms 11 and 13 with almost the same area working at the same time, and the radiated sound wave energy is nearly twice that of the traditional loudspeaker. However, the outer diameter of the speakers remains the same, and the same set of magnetic circuits are shared, so the total weight increase does not exceed 20%.

FIG. 3 is a modification of the embodiment of FIG. 2 , the difference is that the suspension edge is canceled, but a spring wave 42 is provided inside the diaphragm 13 , and the spring wave 42 is fixed on the T iron 71 .

FIG. 4 is a schematic structural diagram of another embodiment of the high-sensitivity loudspeaker of the present invention. Including magnetic circuit system, vibration system and bracket.

The magnetic circuit system consists of washer 51, magnet 61 and T iron 71.

The vibration system 1 includes a voice coil 31 , a diaphragm 11 , a dust cover 12 , and a cantilever 21 . In order to save space, the cantilever 21 is disposed below the diaphragm 11 and fixed on the baffle 82 . The vibration system 2 includes a voice coil 31 , a diaphragm 14 and a suspension edge 22 . Different from the embodiment in FIG. 2 , the two sets of vibration systems in this embodiment are driven by the voice coil 31 .

The support system includes a bracket 81 and two baffles 82 and 83 . The first baffle 83 divides the space between the diaphragm 11 and the diaphragm 14 into two parts 93 and 95 , and the second baffle 82 and the first baffle 83 are combined to form a channel 94 . The space 95 communicates with the space on the front of the speaker through the channel 96 , and the space 93 communicates with the space on the back of the speaker through the channel 94 .

When the voice coil 31 vibrates, the diaphragm 11 and the diaphragm 14 are simultaneously driven to vibrate. The sound wave on the front of the diaphragm 14 propagates through the channel 96 on the front of the speaker and superimposes with the sound wave on the front of the diaphragm 11 .

Claims (3)

1. A high sensitivity speaker, includes magnetic circuit, vibration system and support, its characterized in that: an inner magnetic gap and an outer magnetic gap are arranged in the same set of magnetic circuit system, and two independent voice coils are respectively arranged, wherein the voice coil with smaller size is connected with a vibrating diaphragm and an elastic wave which are arranged on the front face of the loudspeaker, the vibrating diaphragm is connected with a suspension edge, and the suspension edge and the elastic wave are fixed on a bracket; the voice coil with larger size is connected with a second vibrating diaphragm arranged on the back of the loudspeaker, the second vibrating diaphragm is connected with a second suspension edge, and the second suspension edge is fixed on the support; and the sound emitted by the second diaphragm is transmitted to the front surface of the loudspeaker through a hole in the center of the magnetic circuit system.

2. The high sensitivity speaker of claim 1, wherein: and a second elastic wave is arranged in the second vibrating diaphragm, and the second elastic wave is fixed on the T iron of the magnetic circuit system and provides a supporting force for the second vibrating diaphragm.

3. A high sensitivity speaker, includes magnetic circuit, vibration system and support, its characterized in that: the voice coil is connected with the first vibrating diaphragm and the second vibrating diaphragm, the first vibrating diaphragm is connected with the first suspension edge, the second vibrating diaphragm is connected with the second suspension edge, and the first suspension edge and the second suspension edge are respectively fixed on the support; two baffle plates are arranged between the first vibrating diaphragm and the second vibrating diaphragm, the first baffle plate divides the space between the first vibrating diaphragm and the second vibrating diaphragm into two parts, and the second baffle plate and the first baffle plate form a channel; the space between the first diaphragm and the first baffle is communicated with the space on the back of the loudspeaker through the channel; and the space between the second diaphragm and the first baffle is communicated with the space on the front side of the loudspeaker through a channel.

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