CN210899588U

CN210899588U - Internal magnetic dome loudspeaker capable of reducing low-frequency range

Info

Publication number: CN210899588U
Application number: CN201922107745.9U
Authority: CN
Inventors: 易建宇
Original assignee: Shenzhen Tianze Speaker Co ltd
Current assignee: Shenzhen Tianze Speaker Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-06-30
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to the technical field of dome speakers, in particular to an inner magnetic dome speaker capable of reducing the range of low frequency, which comprises a magnetic circuit part consisting of a U-shaped iron, an upper magnetic conductive plate and a magnet, a vibration part consisting of a coil, a vibration diaphragm and a bracket, a rear cover and sound absorption cotton, wherein the upper end of the voice coil framework is propped against the vibrating diaphragm, the space enclosed by the magnetic circuit component and the vibrating diaphragm is divided into two cavities, and the upper end of the voice coil framework is provided with a through hole to communicate the two cavities together, and the wall of the bracket is thinner than that designed by the prior art, so that the volume of the rear cavity is further enlarged, therefore, the low-frequency range of the dome speaker is reduced, and the U iron, the upper magnetic conduction plate and the magnet of the magnetic circuit part are not provided with through holes, so that the magnetic circuit cost is reduced, an acoustic pipeline generated by a traditional magnetic circuit through hole adding mode is eliminated, and the performance of the speaker is improved.

Description

Internal magnetic dome loudspeaker capable of reducing low-frequency range

Technical Field

The utility model belongs to the technical field of the dome speaker, especially, relate to an interior magnetism dome speaker that can reduce low frequency range.

Background

The traditional internal magnetic (i.e. the outer diameter of the magnet is smaller than the inner diameter of the coil) dome speaker is to add a back cavity below the dome diaphragm, as shown in the attached figure 2 of the specification, the speaker is composed of a magnetic circuit component composed of a perforated U-iron 2, a perforated upper magnetic conductive plate 3 and a perforated magnet 1, a vibration component composed of a coil 4, a vibration diaphragm 5 and a bracket 6, and a panel 7, a wiring board 8, a back cover 9 and sound absorption cotton 10. The perforated U iron 2, the perforated upper magnetic conduction plate 3 and the through hole in the middle of the perforated magnet 1 form a channel, and a gap is reserved between the perforated U iron 2 and the rear cover 9, so that the volume of the rear cavity is increased, and the low-frequency range of the dome speaker is reduced.

However, this approach has two disadvantages:

(1) the effective area of the magnet is reduced due to the perforation of the magnet 1, thereby reducing the sensitivity of the loudspeaker;

(2) in order to reduce the loss of sensitivity as much as possible, the holes of the perforated magnet 1, the perforated U-iron 2 and the perforated upper magnetic conductive plate 3 can only be reduced as much as possible, so that a small and long sound duct (in which the sound absorbing cotton is also used to reduce the noise in the sound duct) is formed in the 3 through holes, the acoustic impedance of the sound duct varies with the frequency, and the curve in the low frequency band of the loudspeaker undesirably collapses, and the impedance curve is not smooth, which adversely affects the performance of the loudspeaker.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the whole or part of the technology, the utility model provides an internal magnetic dome loudspeaker which can reduce the low-frequency range, which is realized by the following technical scheme.

An internal magnetic dome loudspeaker capable of reducing the range of low-frequency comprises a magnetic circuit part consisting of a U-shaped iron, an upper magnetic conduction plate and a magnet, and a vibration part consisting of a coil, a vibration diaphragm and a bracket, the upper magnetic conduction plate and the magnet are sequentially arranged in the U-shaped iron from top to bottom, wherein a gap for installing a coil is reserved between the upper magnetic conduction plate and the U-shaped iron, the vibrating diaphragm is fixedly connected with the upper end of the bracket, the lower end of the bracket is fixedly connected with the rear cover, the vibrating part is arranged in a space enclosed by the vibrating diaphragm, the bracket and the rear cover, the upper magnetic conduction plate, the magnet and the bottom surface of the U-shaped iron are all solid bodies, the bottom surface of the U-shaped iron is attached to the rear cover, a gap is reserved between the U iron and the bracket, sound absorption cotton is filled in a cavity surrounded by the U iron, the bracket and the rear cover, and the sound absorption cotton is filled above the upper magnetic conduction plate and below the vibrating diaphragm; the coil is wound on the lower end of the voice coil framework, the upper end of the voice coil framework is propped against the vibrating diaphragm, the space enclosed by the magnetic circuit assembly and the vibrating diaphragm is divided into two cavities, and the upper end of the voice coil framework is provided with a through hole which communicates the two cavities together.

As the utility model relates to a can reduce further improvement of interior magnetic top of ball speaker of low frequency range, vibrating diaphragm rolls over the ring by inside vibrating diaphragm ball top and outside vibrating diaphragm and constitutes, and the upper end of voice coil loudspeaker voice coil skeleton is pushed up with vibrating diaphragm ball top mutually, and vibrating diaphragm rolls over the ring and bonds at the upper end edge of support to the support is the cavity in the below that vibrating diaphragm rolled over the ring.

As a further improvement of the internal magnetic dome speaker of the utility model, a panel and a wiring board are also arranged on the bracket.

The utility model discloses a can reduce low frequency range's beneficial effect of interior magnetism dome speaker:

(1) the U iron, the upper magnetic conductive plate and the magnet of the magnetic circuit part are all solid bodies, and no through hole is formed in the middle of the U iron, the upper magnetic conductive plate and the magnet, so that on one hand, the cost is reduced, and on the other hand, an acoustic pipeline generated in a traditional magnetic circuit through hole adding mode is eliminated, and the performance of the loudspeaker is improved;

(2) the through hole is opened to the upper end of voice coil skeleton to let form a big cavity between vibrating diaphragm, magnetic circuit part and the support, and the support wall compares prior art design to be thinner, has further enlarged the volume in back chamber, thereby reduces the low frequency range of ball top speaker.

Drawings

Fig. 1 is a schematic structural diagram of a speaker according to the present invention;

fig. 2 is a schematic view of a prior art loudspeaker;

fig. 3 is an assembly diagram of the support and the voice coil bobbin of the present invention;

FIG. 4 is a schematic view of a prior art assembly of a support and voice coil former;

in the figure: 1. magnet, 2, U iron, 3, go up magnetic conduction board, 4, coil, 5, vibrating diaphragm, 501, vibrating diaphragm ball top, 502, vibrating diaphragm dog-ear, 6, support, 7, panel, 8, wiring board, 9, back lid, 10, inhale sound cotton, 11, voice coil loudspeaker voice coil skeleton, 1101, through-hole.

Detailed Description

The present invention will be further explained with reference to the following examples and experimental examples, which are only some examples and experimental examples of the present invention, and these examples and experimental examples are only used to explain the present invention, and do not constitute any limitation to the scope of the present invention.

The utility model provides a can reduce interior magnetic dome speaker of low frequency range, includes U iron 2, goes up magnetic conductive plate 3, magnet 1, coil 4, vibrating diaphragm 5, support 6, back lid 9 and inhales sound cotton 10, wherein U iron 2, go up magnetic conductive plate 3, magnet 1 constitute the magnetic circuit part, and coil 4, vibrating diaphragm 5, support 6 constitute the vibrating part.

Wherein, go up magnetic conduction plate 3 and magnet 1 and from top to bottom install in U iron 2 in proper order to go up magnetic conduction plate 3 and magnet 1 and all leave the clearance between U iron 2, wherein go up the clearance between magnetic conduction plate 3 and the U iron 2 and be used for installing coil 4, vibrating diaphragm 5 fixed connection is in the upper end of support 6, and lid 9 behind the lower extreme fixed connection of support 6 makes vibrating part wholly arrange vibrating diaphragm 5, support 6, in the space that back lid 9 encloses in, and still set up panel 7 and wiring board 8 on the support 6.

Specifically, the vibrating diaphragm 5 is composed of an inner vibrating diaphragm dome 501 and an outer vibrating diaphragm corrugated rim 502, the coil 4 is wound at the lower end of the voice coil framework 11, the upper end of the voice coil framework 11 is abutted against the vibrating diaphragm dome 501, a space enclosed by the magnetic circuit assembly and the vibrating diaphragm 5 is divided into two cavities, and the upper end of the voice coil framework 11 is provided with a through hole 1101 to communicate the two cavities together; the vibration diaphragm folded ring 502 is adhered to the edge of the upper end of the bracket, and the bracket 6 is a cavity below the vibration diaphragm folded ring 502 (i.e. the bracket 6 is hollowed out in the space below the vibration diaphragm folded ring 502 except for the part necessary for adhesion and fixation), wherein the sound absorption cotton 10 is filled above the upper magnetic conductive plate 3 and below the vibration diaphragm 5, the bottom surface of the U-shaped iron 2 is attached to the rear cover 9, a gap is left between the U-shaped iron 2 and the bracket 6, and the sound absorption cotton 10 is also filled in the space surrounded by the U-shaped iron 2, the bracket 6 and the rear cover 9.

Wherein the bottom surface of U iron 2 to and go up magnetic conduction plate 3 and magnet 1 and be the solid, the through-hole is not seted up in the centre, the cost is reduced on the one hand, on the other hand has eliminated the produced acoustic duct of traditional magnetic circuit with the mode of through-hole, thereby improve speaker performance, and because the space below vibrating diaphragm folded ring 502 of support except that the fixed necessary part of bonding is excavated the sky, let 6 outer walls of support among the prior art of support 6 compare thinner, make vibrating diaphragm 5, the cavity that forms between magnetic circuit part and the support 6 is bigger, thereby reduce the low frequency range of dome speaker.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments with equivalent changes by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the technical matters of the present invention do not depart from the technical scope of the present invention.

Claims

1. The utility model provides a can reduce interior magnetic dome speaker of low frequency range, includes the magnetic circuit part of compriseing U iron, last magnetic conduction board and magnet, the vibration part of compriseing coil, vibrating diaphragm and support to and back lid and inhale the sound cotton, go up magnetic conduction board and magnet and install in proper order in U iron from top to bottom, wherein go up the clearance that leaves installation coil between magnetic conduction board and the U iron, vibrating diaphragm fixed connection is in the upper end of support, and the lid behind the lower extreme fixed connection of support, vibrating part arrange vibrating diaphragm, support, back lid in enclose the space, its characterized in that: the upper magnetic conductive plate, the magnets and the middle parts of the bottom surfaces of the U irons are all solid bodies, the bottom surfaces of the U irons are attached to the rear cover, gaps are reserved between the U irons and the support, sound absorption cotton is filled in a cavity formed by the U irons, the support and the rear cover in an enclosed mode, and the sound absorption cotton is filled above the upper magnetic conductive plate and below the vibrating diaphragm; the coil is wound on the lower end of the voice coil framework, the upper end of the voice coil framework is propped against the vibrating diaphragm, the space enclosed by the magnetic circuit assembly and the vibrating diaphragm is divided into two cavities, and the upper end of the voice coil framework is provided with a through hole which communicates the two cavities together.

2. The internal magnetic dome speaker of claim 1, wherein the internal magnetic dome speaker is capable of reducing a low frequency range, and wherein: the vibrating diaphragm is composed of an internal vibrating diaphragm ball top and an external vibrating diaphragm folding ring, the upper end of the voice coil framework is propped against the vibrating diaphragm ball top, the vibrating diaphragm folding ring is bonded on the edge of the upper end of the support, and the support is a cavity below the vibrating diaphragm folding ring.

3. The internal magnetic dome speaker of claim 1, wherein the internal magnetic dome speaker is capable of reducing a low frequency range, and wherein: the bracket is also provided with a panel and a wiring board.