CN204119507U - A speaker side sound hole and a speaker structure - Google Patents

Abstract

The utility model provides a loudspeaker side sound hole and a loudspeaker structure. The loudspeaker side sound hole is at least composed of a first magnetic guide plate and a second magnetic guide plate. The first magnetically conductive plate has at least one sound emitting notch at an edge, and the second magnetically conductive plate is arranged on the first magnetically conductive plate to cover one side of the sound emitting notch. The concave structure formed by the second magnetic conductive plate and the sound notch can make the vibration structure of the loudspeaker conduct from the side of the loudspeaker to the outside, thereby avoiding the formation of through holes on the magnetic conductive plate. The magnetic guide plate of the utility model and the side acoustic hole formed by the combination thereof can correct the magnetic force lines of the speaker, prevent the magnetic flux leakage phenomenon of the speaker, and prevent foreign objects from entering the speaker through the sound hole.

Description

A speaker side sound hole and a speaker structure

technical field

The utility model belongs to the technical field of acoustic-electric energy conversion, and in particular relates to a structural design of a loudspeaker sound hole and a loudspeaker structure.

Background technique

In recent years, with the rapid development of mobile communication technology, consumers are increasingly using mobile communication devices with voice functions, such as portable phones, handheld game consoles, laptops, tablet computers and other devices, as mobile communication device applications An important part of the experience, its voice quality has attracted more and more people's attention, and the speaker as the main sound-generating device has received more and more people's attention on its acoustic performance.

In a conventional speaker device, in order to allow the diaphragm to vibrate freely, it is necessary to balance the air pressure inside the speaker, and usually a sound hole is also formed on the back of the speaker. The general manufacturing method is to form a through hole on the magnetic conductive plate on the back of the speaker, so as to open a sound hole on the back of the speaker.

However, due to the presence of through holes on the magnetic conductive plate, the magnetic field generated by the electromagnetic component will be affected by the through holes, resulting in magnetic flux leakage. The magnetic force lines will leak from the through holes of the magnetic conductive plate, thereby reducing the magnetic flux in the electromagnetic components and affecting the sensitivity of the speaker.

On the other hand, since the sound hole communicates with the inside of the speaker, but is directly exposed to the outside, external dust can directly enter the inside of the speaker through the sound hole. When foreign matter enters the speaker, the vibrating components and electromagnetic components will be seriously affected, and the speaker will be scrapped in serious cases. Moreover, since the magnetic guide plate is set at the bottom of the speaker, it is usually in direct contact with other parts of the external device, and it is easy to block the sound hole. If a foreign object blocks the sound hole on the back of the speaker, it will cause air pressure on both sides of the diaphragm inside the speaker. unevenness, affecting the acoustic performance of the loudspeaker unit.

Therefore, it is necessary to propose a new type of loudspeaker sound hole structure, which can reduce magnetic flux leakage, correct magnetic force lines, and increase the strength of the uniform magnetic field between electromagnetic components, thereby improving the sound quality of the loudspeaker. On the other hand, it is necessary to improve the structure of the sound hole of the speaker to prevent foreign objects from entering the inside of the speaker or blocking the sound hole.

Utility model content

In order to solve at least one of the above problems, the utility model provides a side sound hole of a speaker, which is characterized in that the side sound hole of the speaker is at least composed of a first magnetic guide plate and a second magnetic guide plate, the first The magnetic plate has at least one sound emitting notch, the sound emitting notch is located on the edge of the first magnetic conducting plate, and the second magnetic conducting plate is arranged on the first magnetic conducting plate.

The first magnetically conductive plate may include four sound-emitting notches, and the sound-emitting notches are distributed at edges around the first magnetically conductive plate.

The position corresponding to the sound notch on the second magnetically conductive plate may have a shallow notch for sounding, and the shallow notch is along a direction parallel to the surface of the second magnetically conductive plate to the second magnetically conductive The center of the plate is concave.

The position corresponding to the sound notch on the second magnetic conductive plate may have a sound concave portion, and the sound concave portion is depressed along a direction perpendicular to the surface of the second magnetic conductive plate, and the depression extends to the The edge of the second magnetically conductive plate. The structural dimension of the sound emitting recess may be the same as that of the sound emitting notch.

On the other hand, the utility model also provides a loudspeaker structure, which is characterized in that it includes: a vibration assembly, an electromagnetic assembly including a center magnet and a side magnet, and the speaker composed of the first magnetic conductive plate and the second magnetic conductive plate The side sound hole and the casing for carrying the vibration component, the electromagnetic component and the side sound hole of the loudspeaker.

There is a gap between the center magnet and the side magnets, the first magnetically conductive plate covers the center magnet and the side magnets, and the sound emitting notch exposes part of the gap.

When the first magnetically conductive plate covers the central magnet and the side magnets, the bottom edge of the sound emitting notch may be located on the central magnet.

The first magnetically conductive plate and the second magnetically conductive plate may have a positioning portion, and the positioning portion cooperates with the housing to accurately fix the first magnetically conductive plate and the second magnetically conductive plate on the on the shell.

The vibration assembly also includes a centering bracket, a diaphragm and a voice coil installed on the centering bracket, and the voice coil is located in the gap between the center magnet and the side magnets.

The electromagnetic assembly also includes a center washer installed under the center magnet and side washer installed under the side magnet, and there is a gap between the center washer and the side washer.

The speaker side sound hole provided by the new model avoids the formation of a through hole on the magnetic guide plate, and the magnetic field generated by the electromagnetic component is difficult to leak from the speaker side sound hole, and the sound output gap can correct the magnetic force line and reduce the Flux leakage phenomenon, thus enhancing the uniform magnetic field inside the speaker.

On the other hand, the side sound hole of the speaker avoids directly exposing the internal structure of the speaker, but uses the cavity extending to the side edge of the magnetic plate to realize the communication of sound and air inside and outside the speaker. The cavity of the sound hole on the side of the loudspeaker is a bent passage, which can effectively prevent foreign matter from entering the inside of the loudspeaker along the sound hole.

Description of drawings

Fig. 1 is the structural diagram of the first magnetic conduction plate and the second magnetic conduction plate in the specific embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the sound-emitting recess of the second magnetically conductive plate in a specific embodiment of the present invention;

Fig. 3 is the loudspeaker structure schematic diagram that the utility model provides;

Fig. 4 is the explosion diagram of the loudspeaker structure in the specific embodiment of the utility model;

Fig. 5 is a side sectional view of the loudspeaker structure provided by the present invention along the A-A section of Fig. 3 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

The utility model provides a speaker side sound hole, the speaker side sound hole is at least composed of a first magnetic guide plate and a second magnetic guide plate, the first magnetic guide plate has at least one sound outlet gap, the outlet The acoustic notch is located at the edge of the first magnetically conductive plate. The second magnetically conductive plate is arranged on the first magnetically conductive plate, and the second magnetically conductive plate seals one side of the sound notch, and the sound notch and the second magnetically conductive plate form a concave space cavity, making up the speaker side sound holes.

In a specific embodiment, as shown in FIG. 1 , the first magnetically conductive plate 21 has four sound notches 211 , and the sound notches 211 are evenly distributed at the edges around the first magnetically conductive plate 21 . In this embodiment, the outline of the first magnetically conductive plate 21 is close to a rectangle, and the sound emitting notches 211 are arranged at the four corners of the rectangle. The sound-emitting notch 211 is recessed inward for a certain distance from the center of the first magnetic-conductive plate 21 along a direction parallel to the surface of the first magnetic-conductive plate 21 . The shape of the sound notch 211 can be designed according to the actual application, wherein the bottom edge 212 of the sound notch 211 can match the shape of the central magnet in the speaker, and have the same edge line. The location of the sound emitting notch is not limited to the location of the illustrated embodiment, and can be provided on the side of the first magnetically conductive plate, etc. according to actual needs. Those skilled in the art can form the sound-emitting notch 211 on the first magnetically conductive plate 21 by punching and other technical means.

In addition, as shown in FIG. 1 , there is a shallow notch 221 on the second magnetically conductive plate 22 . When the second magnetically conductive plate 22 is arranged on the first magnetically conductive plate 21, in order to facilitate air and sound to penetrate through the sound notch 211, the second magnetically conductive plate 22 will The position of the notch 211 has a shallow notch 221 . The shallow notch 221 shrinks toward the center of the second magnetic conductive plate 22 along a direction parallel to the second magnetic conductive plate 22 , and is concaved for a short distance. The concave distance of the shallow notch 221 is much smaller than the concave distance of the sound emitting notch 211 , and its width may be the same as that of the sound emitting notch 211 . The shallow notch 221 and the sound notch 211 cooperate to form a side sound hole of the speaker, so that sound and air can pass through in a direction perpendicular to the surface of the first magnetic conductive plate 21 .

In particular, as shown in FIG. 2 , the surface of the second magnetically conductive plate 22 opposite to the first magnetically conductive plate may also have a sound-emitting concave portion, and the sound-emitting concave portion 222 is located on the second magnetically conductive plate. 22 corresponding to the sound notch 211. The sound-emitting concave portion forms a depression along a direction perpendicular to the magnetic conductive plate, and extends to the edge of the second magnetic conductive plate 22 . When the second magnetically conductive plate 22 covers the first magnetically conductive plate, the sound emitting recess and the sound emitting notch 211 are combined to form a concave cavity extending from the edge of the magnetically conductive plate. The sound-emitting concave portion can increase the volume of the inner cavity of the side sound hole structure, which is beneficial to improving the acoustic performance of the speaker. Preferably, the contour structure of the sound emitting recess is the same size as the contour structure of the sound emitting notch 211 , and the cavity formed by the cooperation of the sound emitting recess and the sound emitting notch 211 has a regular inner wall.

On the other hand, as shown in FIG. 3 , the present invention also provides a loudspeaker structure 1 having the above-mentioned loudspeaker side sound holes 11 . The loudspeaker structure 1 includes a vibrating assembly, an electromagnetic assembly including a central magnet and a side magnet, the above-mentioned speaker side sound hole 11 composed of the first magnetically conductive plate and the second magnetically conductive plate, and a housing 17 for carrying the above-mentioned components. There is a gap between the central magnet and the side magnets, the first magnetic conductive plate covers the central magnet and the side magnets, and the sound notch of the first magnetic conductive plate should expose part of the gap.

In a specific embodiment, as shown in FIG. 4 , the gap 12 formed by the central magnet 131 and the side magnet 132 is approximately rectangular in shape, and the first magnetically conductive plate 21 has four sound-emitting notches 211, which are respectively located at the second Positions corresponding to the four corners of a rectangle on a magnetically conductive plate 21 . When the first magnetically conductive plate 21 covers the center magnet 131 and the side magnet 132 , the sound emitting notch 211 can expose part of the gap 12 . Preferably, the bottom edge 212 of the sound emitting notch 211 is located on the central magnet 131 , and the gap 12 within the range of the notch can be fully exposed along its width direction. In this embodiment, the four corners of the central magnet 131 are semi-arc curves, and the bottom edge 212 of the sound emitting notch 211 can also be processed into a similar curve for cooperative use. As shown in FIG. 5 , the second magnetically conductive plate 22 covers the first magnetically conductive plate 21 to prevent the gap 12 from being directly exposed to the outside. The gap 12 communicates with the outside from the side of the speaker through the speaker side sound hole 11 formed by the first magnetic conductive plate 21 and the second magnetic conductive plate 22 . As shown in FIG. 4 , there may be a shallow notch on the second magnetic conductive plate 22 at a position corresponding to the sound output notch 211 , and the shallow notch can increase the gap at the exit position of the sound hole on the side of the speaker. The loudspeaker side sound hole 11 composed of the sound notch 211 and the second magnetically conductive plate 22 can correct the magnetic force lines and weaken the magnetic flux leakage phenomenon.

In addition, as shown in FIG. 4, the first magnetically conductive plate 21 and the second magnetically conductive plate 22 have a positioning portion 23 for positioning, and the positioning is matched with the housing to accurately fix the magnetically conductive plate. on the casing. The positioning part 23 can be fixed in the form of a positioning groove, a positioning tenon and various combinations thereof.

Furthermore, as shown in FIG. 5 , the vibration assembly of the loudspeaker structure may also include a centering bracket, a diaphragm 15 and a voice coil 16 installed on the centering bracket. The voice coil 16 is affected by electromagnetic force to drive the diaphragm 15 to vibrate. The voice coil 16 should be located in the gap 12 between the center magnet 131 and the side magnet 132 . The electromagnetic assembly may further include a center washer 141 installed under the center magnet 131 , and a side washer 142 installed under the side magnet 132 . There is the same gap 12 between the center washer 141 and the side washer 142 as between the center magnet 131 and the side magnet 132 .

The scope of application of the utility model is not limited to the specific embodiments described above, and those skilled in the art can adjust the shape and position of the sound-emitting notch, the structural shape of the sound-emitting recess and the shallow notch according to the work needs. The principle of the utility model is: by forming a gap on the first magnetic conductive plate, one side of the gap is sealed with the second magnetic conductive plate, thereby avoiding the formation of through holes on the magnetic conductive plate while forming the side acoustic hole structure, In turn, the magnetic force lines are corrected, the magnetic flux leakage phenomenon is reduced, and foreign matter is prevented from entering the loudspeaker structure from the sound hole. For those of ordinary skill in the art, it can be understood that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principle and spirit of the utility model, and the appended claims of the utility model are intended to These modifications, substitutions and other structures are included in the scope of protection.

Claims (10)

1. a loud speaker side acoustic aperture, is characterized in that:

Described loud speaker side acoustic aperture is at least made up of the first magnetic conductive board (21) and the second magnetic conductive board (22);

Described first magnetic conductive board (21) has at least one breach of speaking (211), described in breach (211) of speaking be positioned at the edge of described first magnetic conductive board (21);

Described second magnetic conductive board (22) is arranged on described first magnetic conductive board (21).

2. loud speaker side according to claim 1 acoustic aperture, it is characterized in that, described first magnetic conductive board (21) comprises four breach of speaking (211), described in breach (211) of speaking be distributed in the edge of described first magnetic conductive board (21).

3. loud speaker side according to claim 1 acoustic aperture, it is characterized in that, speak described in the upper correspondence of described second magnetic conductive board (22) position of breach (211) has shallow breach (221) for speaking, described shallow breach (221) edge is parallel to the direction in described second magnetic conductive board (22) plate face, to the second magnetic conductive board (22) center indent.

4. loud speaker side according to claim 1 acoustic aperture, it is characterized in that, speak described in the upper correspondence of described second magnetic conductive board (22) position of breach (211) has recess of speaking (222), described recess of speaking (222) is caved in along the direction perpendicular to described second magnetic conductive board (22) plate face, and described depression extends to the edge of described second magnetic conductive board (22).

5. loud speaker side according to claim 4 acoustic aperture, is characterized in that, described in recess (222) of speaking identical with the physical dimension of described breach of speaking (211).

6. a loadspeaker structure, is characterized in that, comprising:

Vibration component;

Comprise the electromagnetic assembly of centring magnet (131) and limit magnet (132), between described centring magnet (131) and limit magnet (132), there is gap (12);

One of claim 1-5 is any described the first magnetic conductive board (21) and loud speaker side acoustic aperture (11) that the second magnetic conductive board (22) forms;

For carrying the shell (17) of described vibration component, electromagnetic assembly and loud speaker side acoustic aperture (11);

Described first magnetic conductive board (21) covers on described centring magnet (131) and limit magnet (132), described in speak gap (12) described in breach (211) expose portion.

7. loadspeaker structure according to claim 6, it is characterized in that, when described first magnetic conductive board (21) cover described centring magnet (131) and limit magnet (132) upper time, described in the speak base (212) of breach (211) be positioned on described centring magnet (131).

8. loadspeaker structure according to claim 6, it is characterized in that, described first magnetic conductive board (21) and the second magnetic conductive board (22) has location division (23), described location division (23) coordinates with described shell (17), for described first magnetic conductive board (21) and the second magnetic conductive board (22) are accurately fixed on described shell (17).

9. loadspeaker structure according to claim 6, is characterized in that, described vibration component comprises centering support, is arranged on vibrating diaphragm (15) on described centering support and voice coil loudspeaker voice coil (16);

Described voice coil loudspeaker voice coil (16) is arranged in the gap (12) between described centring magnet (131) and limit magnet (132).

10. loadspeaker structure according to claim 6, it is characterized in that, described electromagnetic assembly comprises and is arranged on the center washer (141) under described centring magnet (131) and the limit washer (142) under being arranged on described limit magnet (132);

Gap (12) is there is between described center washer (141) and limit washer (142).