CN204616078U - speaker device - Google Patents

Abstract

The utility model discloses a kind of speaker unit, involving vibrations system, the auxiliary system of magnetic circuit system and the fixing described magnetic circuit system of collecting and vibrational system, described vibrational system comprises the vibrating diaphragm combined, centring disk and voice coil loudspeaker voice coil, described centring disk comprises the first fixed part, be arranged at the second fixed part in described first fixed part and connect the linking arm of described first fixed part and described second fixed part, and: described second fixed part center is provided with piezoelectric patches, the corresponding described piezoelectric patches of described centring disk is provided with the first pad, described piezoelectric patches is electrically connected with described first pad.Speaker unit of the present utility model, the audio signal that the signal that piezoelectric patches sends sends with voice coil loudspeaker voice coil-vibrating diaphragm mixes, and effectively improves the medium-high frequency effect of speaker unit, improves the acoustical behavior of speaker unit, therefore, the utility model speaker unit has the good advantage of acoustical behavior.

Description

speaker device

technical field

The utility model relates to the field of electroacoustics, in particular to a loudspeaker device with good medium and high frequency performance.

Background technique

With the development of science and technology, portable electronic devices are widely concerned by people, and the loudspeaker device, as the main sound generating unit of the portable electronic terminal, directly affects the use effect of the portable electronic device. As people's requirements for audio effects of portable electronic terminals are increasing day by day, the acoustic performance of loudspeaker devices has drawn more and more attention from the industry.

The loudspeaker device in the prior art includes a vibration system, a magnetic circuit system and an auxiliary system. The auxiliary system accommodates the fixed vibration system and the magnetic circuit system. The vibration system includes a voice coil, a diaphragm and a centering strut, and a reinforcing part is set at the center of the centering strut; There is a magnetic gap, and the voice coil is set in the magnetic gap, and the current change of the conductive voice coil in the magnetic field is used to vibrate by the Lorentz force, driving the diaphragm to vibrate and produce sound. For the loudspeaker device with this structure, its high-frequency frequency response curve will drop rapidly at more than ten K Hz, resulting in a high-frequency cut-off frequency, and cannot produce higher-frequency sound waves with better acoustic quality. Due to the limitation of the material and process of the traditional loudspeaker device, it is difficult to increase its high-frequency cut-off frequency, and it is also difficult to significantly improve the mid-high frequency effect of the loudspeaker device.

Therefore, it is necessary to propose an improvement to overcome the defects of the prior art speaker devices.

Utility model content

The technical problem to be solved by the utility model is to provide a loudspeaker device with good medium and high frequency effects.

In order to achieve the above object, the utility model adopts the following technical solutions:

A loudspeaker device, comprising a vibration system, a magnetic circuit system, and an auxiliary system for accommodating and fixing the magnetic circuit system and the vibration system, the vibration system includes a combined diaphragm, a centering piece and a voice coil, the fixed The branch piece includes a first fixing part, a second fixing part arranged in the first fixing part, and a connecting arm connecting the first fixing part and the second fixing part, and: the center of the second fixing part A piezoelectric sheet is provided at a position, and the damper is provided with a first pad corresponding to the piezoelectric sheet, and the piezoelectric sheet is electrically connected to the first pad.

As a preferred technical solution, the second fixing part is an annular structure, and the outer periphery of the piezoelectric sheet is fixedly combined with the second fixing part.

As a preferred technical solution, the diaphragm includes a fixed part, a plane part in the middle, and a ring part connecting the fixed part and the plane part, and the plane part and the spider are secondly fixed Ministry of fixed combination.

As a preferred technical solution, as a preferred technical solution, the damper is provided with a second welding pad, and the second welding pad is electrically connected to the voice coil.

As a further preferred technical solution, both the first pad and the second pad are disposed on the second fixing portion. As a further technical solution, the piezoelectric sheet is disposed on a side of the second fixing portion away from the diaphragm.

As a further preferred technical solution, the first fixing part is provided with a first external pad and a second external pad, the first external pad is electrically combined with the first pad, and the second pad A pad is electrically coupled to the second external pad.

As a further preferred technical solution, the damper is provided with a conductive circuit, and the first fixing part, the second fixing part and the connecting arm are all provided with the conductive circuit.

As a preferred technical solution, the auxiliary system includes a front cover and a casing.

As a further preferred technical solution, the damper is fixedly arranged between the front cover and the housing.

In the loudspeaker device of the present invention, a piezoelectric sheet is fixed on the second fixed part in the center of the centering strut, and the centering strut is provided with a first pad corresponding to the piezoelectric sheet, and after the piezoelectric sheet is electrically connected to the centering strut It is electrically connected with the external circuit. The loudspeaker device of the present utility model adopts a piezoelectric sheet instead of a traditional structural loudspeaker device and is arranged at the reinforcing part at the center of the centering support. The piezoelectric sheet can play the role of the reinforcing part and improve the acoustic performance of the loudspeaker device. At the same time, As an independent sounding unit, the piezoelectric sheet can send out medium and high frequency audio signals, which can supplement the audio signals of the voice coil-diaphragm sounding structure of the utility model. The signal from the piezoelectric sheet is mixed with the audio signal from the voice coil-diaphragm, effectively improving the mid-high frequency effect of the speaker device and improving the acoustic performance of the speaker device.

Description of drawings

Fig. 1 is an exploded view of a specific embodiment of the utility model;

Fig. 2 is a sectional view of the loudspeaker device shown in Fig. 1;

Fig. 3 is a perspective view of the damper in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing, describe the utility model content in detail:

As shown in Figure 1 and Figure 2, the specific embodiment of the loudspeaker device of the present invention includes a vibration system, a magnetic circuit system and an auxiliary system. The auxiliary system includes a front cover 11 and a casing 12, and the front cover 11 and the casing 12 accommodate a fixed vibration system and a magnetic circuit system. The vibration system includes a diaphragm 4, a strut 3 and a voice coil 5 fixedly combined with the diaphragm 4, and the magnetic circuit system includes a magnet and a magnetic guide. As shown in Figure 2, the magnetic circuit system is provided with a magnetic gap, and the voice coil 5 suspended in the magnetic gap. The external electrical signal enters the voice coil 5, and the current change in the voice coil 5 set in the magnetic field causes the voice coil 5 to vibrate up and down under the Lorentz force. The vibration of the voice coil 5 drives the vibration of the diaphragm 4, and the vibration of the diaphragm 4 drives the air vocalize.

As shown in Figure 3, in the loudspeaker device of the present invention, the spider 3 includes a first fixed part 31, a second fixed part 32 arranged in the first fixed part 31, the first fixed part 31 and the second fixed part 32 Connected by the connecting arm 33 , as shown in FIG. 1 and FIG. 2 , the piezoelectric sheet 2 is disposed at the center of the second fixing portion 32 of the damper 3 . In the piezoelectric speaker of the utility model, the piezoelectric sheet 2 is used as another sound source, and cooperates with the sound source composed of the voice coil-diaphragm. The audio signal is supplemented. The signal from the piezoelectric sheet 2 is mixed with the audio signal from the voice coil-diaphragm, effectively improving the mid-high frequency effect of the speaker device and improving the acoustic performance of the speaker device.

As shown in Figure 3, a group of first pads 32a are arranged on the second fixing part 32. During the assembly and production process of the loudspeaker device of the present invention, the piezoelectric sheet 2 is electrically connected to the first pads 32a, and the piezoelectric sheet 2 passes through The damper 3 is electrically connected with the external circuit.

As shown in Figure 3, in the speaker device of this embodiment, the second fixing part 32 of the damper 3 is an annular structure. 32 fixed bindings. The second fixing part 32 has a ring structure, which reduces the weight of the vibration system and is beneficial to improve the acoustic performance of the speaker device.

As shown in Fig. 1 and Fig. 2, in the speaker device of the present embodiment, the diaphragm 4 includes a fixed part, a planar part arranged in the center of the fixed part and a ring part connecting the fixed part and the planar part, as shown in Fig. 2 As shown, the planar part of the diaphragm 4 is combined with the second fixed part of the damper 3 , and the fixed part of the diaphragm 4 is combined with the first fixed part of the damper 3 . The vibrating membrane 4 of this embodiment has an annular structure corresponding to the central position of the piezoelectric sheet 2 at the center of the planar part, and the vibrating membrane 4 with no material at the central position can reduce the weight of the vibration system and improve the acoustic performance of the speaker device.

As shown in FIG. 3 , the damper 3 is provided with a group of second welding pads 32 b corresponding to the voice coil, and the second welding pads 32 b are welded to the leads of the voice coil. The first fixing part 31 is provided with a group of first external pads 31a and a group of second external pads 31b, the first external pads 31a are electrically combined with the first pads 32a, the second external pads 31b are connected with the second pads 32b is electrically bound. The first external pad 31a and the second external pad 31b are respectively electrically connected to external electronic circuits. The centering strut of this embodiment is provided with a conductive circuit, which can be a flexible conductive circuit board structure, and the first fixed part 31, the second fixed part 32 and the connecting arm 33 are all provided with a conductive circuit to ensure that the piezoelectric sheet And the voice coil is electrically connected with the external circuit.

As shown in Figure 2, in the loudspeaker device of this embodiment, the piezoelectric sheet 2 is arranged on the side of the strut 3 away from the diaphragm 4. The design of the electrical connection between the speakers simplifies the difficulty of circuit design of the speaker device, reduces the difficulty of production and assembly of the speaker device, and improves production efficiency.

In the loudspeaker device of the present utility model, the piezoelectric sheet can be used as a reinforcing part to improve the acoustic performance of the loudspeaker device by adopting the piezoelectric sheet instead of the reinforcing part arranged in the center of the centering strut. , as an independent sounding unit, the piezoelectric sheet can send out medium and high frequency audio signals, which can supplement the audio signals of the voice coil-diaphragm sounding structure of the utility model. The signal from the piezoelectric sheet is mixed with the audio signal from the voice coil-diaphragm, effectively improving the mid-high frequency effect of the speaker device and improving the acoustic performance of the speaker device.

The above is only an implementation example of the utility model, and is not intended to limit the utility model, but any equivalent modification or change made by those of ordinary skill in the art based on the content disclosed in the utility model should be included in the scope of protection recorded in the claims Inside.

Claims (10)

1. A loudspeaker device comprising a vibrating system, a magnetic circuit system and an auxiliary system for accommodating and fixing the magnetic circuit system and the vibrating system, the vibrating system comprising a vibrating membrane, a strut and a voice coil combined together, so The damper includes a first fixing part, a second fixing part arranged in the first fixing part, and a connecting arm connecting the first fixing part and the second fixing part, and it is characterized in that: the first fixing part A piezoelectric sheet is disposed at the center of the two fixing parts, and the centering strut is provided with a first pad corresponding to the piezoelectric sheet, and the piezoelectric sheet is electrically connected to the first pad. 2. The loudspeaker device according to claim 1, wherein the second fixing part is a ring structure, and the outer periphery of the piezoelectric sheet is fixedly combined with the second fixing part. 3. The loudspeaker device according to claim 1, characterized in that: the diaphragm comprises a fixed part, a plane part in the middle and a ring part connecting the fixed part and the plane part, the plane part and the plane part The second fixed part of the damper is fixedly combined. 4. The loudspeaker device according to claim 1, wherein the damper is provided with a second welding pad, and the second welding pad is electrically connected to the voice coil. 5 . The speaker device according to claim 4 , wherein both the first pad and the second pad are disposed on the second fixing portion. 6 . 6 . The speaker device according to claim 5 , wherein the piezoelectric sheet is disposed on a side of the second fixing portion away from the diaphragm. 7 . 7. The speaker device according to claim 5, characterized in that: the first fixing part is provided with a first external pad and a second external pad, and the first external pad and the first pad electrical combination, the second pad is electrically combined with the second external pad. 8. The loudspeaker device according to claim 7, characterized in that: the damper is provided with conductive lines, and the positions of the first fixing part, the second fixing part and the connecting arm are all set the conductive circuit. 9. The loudspeaker assembly of claim 1, wherein the auxiliary system includes a front cover and a housing. 10. The speaker device according to claim 9, wherein the damper is fixedly disposed between the front cover and the housing.