CN204377129U - Sound-producing device - Google Patents

Abstract

The utility model discloses a kind of sound-producing device, comprise auxiliary system, be contained in magnetic circuit system and the vibrational system of described auxiliary system, described vibrational system comprises the voice coil loudspeaker voice coil and vibrating diaphragm that are combined as a whole, described magnetic circuit system comprises centring magnet and magnetic conductive part, described centring magnet is fixed on described magnetic conductive part away from described vibrational system side, described magnetic circuit system is provided with magnetic gap, described voice coil loudspeaker voice coil is arranged in described magnetic gap, and: the corresponding described magnetic gap position of described magnetic conductive part is provided with the phonate hole of through described magnetic conductive part.The utility model sound-producing device has the good advantage of acoustical behavior.

Description

Sound device

technical field

The utility model relates to the field of electroacoustics, in particular to a sounding device with good acoustic performance.

Background technique

With the expansion of the consumer electronics market, a large number of consumer electronics products such as mobile phones and notebook computers have been widely promoted, and sound emitting devices have been widely used as important acoustic components in consumer electronics products. With the improvement of the quality pursuit of consumer electronic products, the acoustic performance of sound emitting devices has attracted more and more attention. Therefore, how to improve the acoustic performance of the sound generating device has become the focus of research in the industry.

Utility model content

The technical problem to be solved by the utility model is to provide a sounding device with good acoustic performance.

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

The sounding device includes an auxiliary system, which is accommodated in the magnetic circuit system and the vibration system of the auxiliary system. The vibration system includes a fixedly combined voice coil and a diaphragm. The magnetic circuit system includes a central magnet and a magnetic conductor. The center magnet is fixed on the magnetic conductive part on the side away from the vibration system, the magnetic circuit system is provided with a magnetic gap, the voice coil is arranged in the magnetic gap, and: the magnetic conductive part corresponds to the The position of the magnetic gap is provided with a sound hole passing through the magnetic conducting member.

As a preferred solution: there are multiple sound outlets, and the plurality of sound outlets are symmetrical with respect to the central magnet.

As a preferred solution: the sound outlet is set facing the voice coil.

As a preference of the above solution, the width of the sound outlet corresponds to the width of the magnetic gap.

As a preference of the above solution, the outer side of the magnetic conducting member away from the central magnet is provided with a depression corresponding to the sound outlet.

As a further preference, damping is provided in the depression, and the damping covers the sound outlet. As a further preference, the damper is bonded and fixed to the magnetically permeable member through an adhesive layer. As a further preferred solution, the outer side of the damping is flush with the outer side of the magnetic conducting member.

As a preferred technical solution, the magnetic circuit system further includes a side magnet, the side magnet is arranged at an edge position of the center magnet, and the gap between the side magnet and the center magnet is a magnetic gap.

As a preferred technical solution, the auxiliary system includes a housing, the sound emitting device is a square structure, and the housing corresponds to a square structure, and the four corners of the magnetic conducting member are provided with escapes corresponding to the housing, and the four corners of the magnetic conducting member and The housing cooperates to form a sound vent.

The sound generating device of the utility model provides a sound hole at the position corresponding to the magnetic gap of the magnetic guide part, which can ensure the sound effect while expanding the volume of the magnetic circuit system, fully utilize the space of the magnetic gap position, increase the volume of the magnetic circuit system, and improve the sound generation. Acoustic performance of the device.

In order to ensure the sound balance of the sound outlet and further improve the acoustic performance of the sound generator, there are multiple sound outlets, and the positions of the multiple sound outlets are arranged in the magnetic gap symmetrically with respect to the central magnet. The width of the sound hole corresponds to the width of the magnetic gap, which can maximize the sound hole. The sound hole is set under the voice coil corresponding to the magnetic gap, which can effectively reduce THD low frequency and odd harmonic distortion peaks, greatly improve subjective listening performance, and improve sound quality. In order to prevent the sound outlet from being blocked by other components when the sound generating device is installed, a depression is provided on the outer side of the magnetic guide away from the center magnet corresponding to the sound outlet. In order to prevent dust and debris from entering the product, damping is provided in the depression, and the damping covers the sound hole. In order to improve the firmness of the combination of the damper and the magnetic conductor, the damper is bonded and fixed to the magnetic conductor through an adhesive layer. In order not to increase the thickness of the sounding device and facilitate the thinning design of the sounding device, the outer side of the damper is flush with the outer side of the magnetic conductive part. When the sound generating device has a square structure, the four corner magnetic parts of the square structure cooperate with the shell to form sound leakage holes, and the four sound leakage holes are matched with the sound output holes at the position of the magnetic gap, which can effectively improve harmonic distortion , improve the acoustic performance of the sounding device.

To sum up, the sound generating device of the present invention has the advantage of good acoustic performance.

Description of drawings

Fig. 1 is the perspective view of the specific embodiment of the utility model;

Fig. 2 is an exploded view of the sounding device shown in Fig. 1;

Fig. 3 is a partial sectional view of Fig. 1A-A;

Figure 4 is an enlarged view of part I in Figure 3;

Fig. 5 is a schematic diagram of the magnetic circuit system of the sound generating device shown in Fig. 1;

Fig. 6 is a perspective view of the magnetic guide shown in Fig. 1;

FIG. 7 is a partial structural diagram of the sound generating device shown 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 sound generating device of the present invention includes an auxiliary system, a vibration system and a magnetic circuit system. The auxiliary system includes a front cover 11 and a casing 12. The cavity of the road system. The vibration system includes a composite layer 21 fixedly combined, a diaphragm 22 and a voice coil 23; the magnetic circuit system includes a magnetic guide 33, a central magnet 31a fixed at the center of the magnetic guide 33, and side magnets arranged around the central magnet 31a 32a; the center magnet 31a and the side magnet 32a are all arranged on the magnetic guide 33, as shown in Figure 3 and Figure 5, a magnetic gap 3' is arranged between the center magnet 31a and the side magnet 32a, as shown in Figure 2, the center The magnet 31a and the side magnet 32a are respectively provided with a center washer 31b and a side washer 32b near the side of the vibration system. The center washer 31b and the side washer 32b can correct the magnetic force lines and increase the magnetic flux in the magnetic gap 3'; the voice coil 23 is set In the magnetic gap 3 ′, the voice coil 23 is electrically connected to the electrical connector 4 , and the voice coil 23 is electrically connected to an external circuit through the electrical connector 4 . When the sounding device of the utility model works, the current in the voice coil 23 changes, and the voice coil 23 arranged in the magnetic gap 3' vibrates up and down under the action of the Lorentz force, driving the diaphragm 22 to vibrate and produce sound.

As shown in Fig. 3, Fig. 5, Fig. 6 and Fig. 7, in the sound generating device of the present invention, the position of the magnetic conducting part 33 corresponding to the magnetic gap 3' is provided with a sound outlet 7a passing through the magnetic conducting part 33a. The sound hole 7a arranged at the position of the magnetic gap 3' can increase the volume of the magnetic circuit system as much as possible under the premise of ensuring the sound, make full use of the space at the position of the magnetic gap, and improve the acoustic performance of the sound generating device. As shown in Figures 5 to 7, in the sound generating device of this embodiment, there are two sound outlet holes 7a arranged in the magnetic gap 3', and the two sound outlet holes 7a are arranged symmetrically with respect to the center magnet 31a, and the symmetrically arranged sound outlet holes 7a can make the sound effect on both sides of the central magnet 31a the same, and improve the acoustic performance of the sound generating device. In actual application, the number of sound outlets 7a can be increased, but it should be ensured that the plurality of sound outlets 7a are symmetrical about the central magnet 31a, so as to ensure the same sound effects on both sides of the central magnet 31a, and ensure the acoustic performance of the sound generating device. As shown in Figure 3, as a preferred solution, in the sound emitting device of this embodiment, the sound outlet 7a is set up against the voice coil 23, in order to maximize the sound outlet 7a, as shown in Figure 5, the width of the sound outlet 7a d is the same as the width d of the magnetic gap 3'. In the sound generating device of the utility model, the magnetic guide part 7 is provided with a sound outlet 7a facing the voice coil, which can reduce THD low frequency and odd harmonic distortion peaks, greatly improve subjective listening performance, and improve sound quality. Certainly, this implementation mode is only a preference of the sound generating device of the present utility model, and the protection scope of the sound generating device of the present utility model is subject to claim 1 .

3 and FIG. 6, in the sound generating device of this embodiment, the magnetic guide 33 is provided with a recess 33a at the position corresponding to the sound hole 7a away from the center magnet 31a. As shown in FIG. Extending to the position of the sound outlet 7a can ensure that the sound outlet 7a communicates with the external space when the outside of the magnetic conducting member 33 is in contact with other components, and prevents the sound outlet 7a from being blocked. As shown in Figure 3 and Figure 4, in order to prevent dust and other debris from entering the interior of the sound generating device, a damper 6 is provided in the depression 33a, and the damper 6 covers the sound outlet 7a; the damper 6 is a mesh structure with holes to ensure that the sound can pass through And effectively dustproof. As shown in FIG. 4 , the damper 6 and the magnetic conductor 33 are bonded and fixed by colloid 5 to improve the firmness of the combination of the damper 6 and the magnetic conductor 33 . In order to improve the thin design of the sound generating device, as shown in FIG. 1 and FIG. 3 , the outer side of the damper 6 is flush with the outer side of other parts of the magnetic guide member 33 except the recessed position.

As shown in Fig. 2 and Fig. 5, the sound generating device of the present embodiment, the magnetic circuit system includes side magnet 32a, in practical application, the number of side magnet 32a can be 4 pieces or only by magnetic guide 33 and center magnet 31a Composition, all do not affect the utility model sounding device advantage embodiment. As shown in Figure 1 and Figure 7, the sounding device of the present embodiment is a square structure, as shown in Figure 7, the housing 12 is correspondingly a square structure, the four corners of the magnetic conducting part 33 are provided with avoidances corresponding to the housing, and there are four magnetic conducting parts 33 The corner cooperates with the shell 12 to form four sound leakage holes 7b, and the four sound leakage holes 7b cooperate with the sound outlet hole 7a, which can effectively improve the harmonic distortion of the sound generating device and improve the acoustic performance of the sound generating device.

To sum up, it can be seen that the sound generating device of the present utility model has the advantage of good acoustic performance.

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. Sound generating device, comprising an auxiliary system, accommodated in the magnetic circuit system and vibration system of the auxiliary system, the vibration system includes a fixedly combined voice coil and diaphragm, and the magnetic circuit system includes a central magnet and a magnetic conductor, The central magnet is fixed on the magnetically conductive part on the side away from the vibration system, the magnetic circuit system is provided with a magnetic gap, and the voice coil is arranged in the magnetic gap, and it is characterized in that: the magnetically conductive Corresponding to the position of the magnetic gap, a sound outlet hole is provided through the magnetic conducting member. 2 . The sound emitting device according to claim 1 , wherein there are multiple sound outlet holes, and the plurality of sound outlet holes are symmetrical with respect to the central magnet. 3 . 3. The sound generating device according to claim 1, characterized in that: the sound output hole is set directly to the voice coil. 4. The sound emitting device according to any one of claims 1 to 3, wherein the width of the sound outlet corresponds to the width of the magnetic gap. 5. The sound generating device according to any one of claims 1 to 3, characterized in that: the outer side of the magnetic conducting member away from the central magnet is provided with a depression corresponding to the sound outlet. 6 . The sound generating device according to claim 5 , wherein a damper is provided in the recess, and the damper covers the sound outlet. 7 . 7 . The sound generating device according to claim 6 , wherein the damper is bonded and fixed to the magnetically conductive member through an adhesive layer. 8 . 8. The sound generating device according to claim 6 or 7, characterized in that: the outer side of the damping is flush with the outer side of the magnetic conducting member. 9. The sound generating device according to claim 1, characterized in that: the magnetic circuit system further comprises a side magnet, the side magnet is arranged at the edge position of the center magnet, and the distance between the side magnet and the center magnet is The gap between them is the magnetic gap. 10. The sound generating device according to claim 1, characterized in that: the auxiliary system includes a housing, the sound generating device is a square structure, the housing corresponds to a square structure, and the four corners of the magnetic conductive member are arranged corresponding to the housing If there is avoidance, the four corners of the magnetic guide part cooperate with the shell to form sound leakage holes.