CN109413551B

CN109413551B - Double magnetic circuit middle sound compression driving device

Info

Publication number: CN109413551B
Application number: CN201811289661.5A
Authority: CN
Inventors: 张世弘
Original assignee: Ningbo Impala Electronics Co ltd
Current assignee: Ningbo Impala Electronics Co ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-09-04
Anticipated expiration: 2038-10-31
Also published as: CN109413551A

Abstract

The invention relates to the technical field of loudspeaker equipment, and discloses a double-magnetic-circuit mediant compression driving device which comprises an upper cover, a central column, a first magnetic circuit, a first vibrating plate, a first equalizer and a base which are sequentially arranged from top to bottom, and also comprises a second equalizer, a second vibrating plate and a second magnetic circuit which are sequentially arranged from top to bottom, wherein the second equalizer, the second vibrating plate and the second magnetic circuit are arranged between the first equalizer and the base; in order to solve the problems of slow heat dissipation, low space utilization rate, limited tone quality improvement and poor voice performance in the prior art, the scheme is characterized in that the first equalizer and the second equalizer are sleeved together through the central column, and the sound is converged to the central column from a double channel formed by the first equalizer and the second equalizer, so that the tone quality of the whole driving device is improved, the whole structure is more compact, and the space utilization is better; through the arrangement of the first magnetic circuit, the second magnetic circuit, the first vibration plate and the second vibration plate, the heat dissipation speed of the whole driving device is higher.

Description

Double magnetic circuit middle sound compression driving device

Technical Field

The invention relates to the technical field of loudspeaker equipment, in particular to a double-magnetic-circuit middle sound compression driving device.

Background

The requirements for the performance of loudspeakers are nowadays increasing. When the loudspeaker does work, the generated heat is generally transmitted by air and a contacted part, in view of the design of the traditional loudspeaker, the heat dissipation efficiency of the air is limited, the diaphragm and the magnetic circuit are main media for heat dissipation, and the heat dissipation speed also influences the service life and the tone quality of the loudspeaker.

The diaphragm is the main problem of speaker tone quality, and present well sound compression drive arrangement mostly adopts the dome sound membrane, and well audio frequency section is high to the requirement of diaphragm, and the requirement in vibration region is very concentrated, and sound is very limited to the space utilization of product and the promotion of tone quality in the present dome sound membrane, and the performance of dome sound membrane to the human voice is also very poor.

Disclosure of Invention

The invention aims to provide the double-magnetic-circuit middle voice compression driving device which has the advantages of fast heat dissipation, better space utilization, obvious improvement on the voice quality and better performance on human voice.

Double magnetic circuit's middling compression drive arrangement in this scheme, include from last upper cover that sets gradually down, the center post, first magnetic circuit, first vibration board, first balanced device and base, still include from last second balanced device that sets gradually down, second vibration board and second magnetic circuit, the second balanced device, the second vibration board, second magnetic circuit sets up between first balanced device and base, the center post suit is in proper order in first magnetic circuit, first vibration board, first balanced device, the second magnetic circuit, second vibration board and second balanced device.

The technical principle and the beneficial effects of the scheme are as follows:

1. this scheme drive arrangement can bear bigger power through the setting of first vibration board and second vibration board, under the same power, can send better tone quality.

2. According to the scheme, the first magnetic circuit, the first vibrating plate, the first equalizer, the second magnetic circuit, the second vibrating plate and the second equalizer are sleeved together through the central column, and sound is converged to the central column from a double channel formed by the first equalizer and the second equalizer, so that the sound transmission is faster and farther, the sound quality of the whole driving device is further improved, and the performance of human voice is better; then sound is conducted to the upper cover by the center post to in being conducted the air by the upper cover, need not to set up the shell conduction sound of tubaeform, whole structure is compacter, thereby has reduced whole drive arrangement's area, and space utilization is better.

3. This scheme is through the setting of first magnetic circuit, second magnetic circuit, first vibration board and second vibration board, and the heat that produces when drive arrangement used will be conducted the air by first magnetic circuit, second magnetic circuit, first vibration board and second vibration board for whole drive arrangement radiating speed is faster, and the thermal diffusivity is better, thereby has improved drive arrangement's life.

Further, the first magnetic circuit and the second magnetic circuit both comprise a shell and a magnet, the magnet is installed in the shell, and the shell is made of low-carbon steel. The first magnetic circuit and the second magnetic circuit are both formed by low-carbon steel shells with high magnetic flux and high-performance magnets, so that the sound conduction performance of the product can be improved, the heat dissipation can be accelerated, and the service life of the driving device is further prolonged.

Further, first vibration board and second vibration board all include voice coil loudspeaker voice coil and diaphragm, and the voice coil loudspeaker voice coil bonds on the diaphragm, and the heat-resisting glue of voice coil loudspeaker voice coil surface coating, the diaphragm is formed by polyester film thermoforming. The diaphragm is made of a polyester film through thermal forming, so that the diaphragm has good heat resistance, and the voice coil can bear higher power and work for a longer time by coating heat-resistant glue on the voice coil.

Furthermore, the upper cover, the central column and the base are all made of aluminum. The aluminum product has better thermal conductivity, thereby improving the thermal conductivity of the upper cover, the central column and the base, improving the heat dissipation of the whole driving device and preventing the internal temperature of the driving device from being overhigh.

Furthermore, the upper cover is fixedly connected with a heat dissipation block. The heat dissipation of upper cover has been strengthened in the setting of radiating block for whole drive arrangement's heat dissipation is better.

Further, the size of the central column decreases from top to bottom. The size of the central column is set, so that the sound of two channels formed by the first equalizer and the second equalizer can be combined, and the directivity and the propagation distance of the sound are obviously improved.

Furthermore, foam is fixed at the bottom of the base. The foam is adopted, so that the air tightness is ensured, meanwhile, the contact surface of a product and air is enlarged, and the heat dissipation of the driving device is faster.

Further, first equalizer and second equalizer all include annular inner disc and annular outer dish, and annular outer dish integrated into one piece is in annular inner disc periphery, and a plurality of recess of bottom side circumference equipartition of annular outer dish, the bottom side circumference equipartition of annular inner disc have the curved groove of equaling of a plurality of, and it is protruding that the annular inner disc top is equipped with the annular, and a plurality of equaling groove intercommunication has a plurality of through-hole, and a plurality of through-hole equaling groove interval sets up for a plurality of relatively a plurality of, and a plurality of through-hole circumference equipartition is protruding in the annular. A plurality of equalizer tanks on first equalizer and the second equalizer splice each other and form the storehouse of equalling, and the sound equalization effect becomes better, and first equalizer and second equalizer all are provided with a plurality of through-hole moreover for the volume of sound is higher, and tone quality is better.

Drawings

FIG. 1 is an exploded view of a dual magnetic circuit MIDDLE compression driver in accordance with an embodiment of the present invention;

FIG. 2 is a perspective view of the central column of FIG. 1;

fig. 3 is a schematic perspective view of the first magnetic circuit of fig. 1;

fig. 4 is a perspective view of the first vibration plate of fig. 1;

FIG. 5 is a schematic perspective view of the first equalizer of FIG. 1 with the top surface facing upward;

fig. 6 is a schematic bottom-up perspective view of the first equalizer of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises an upper cover 1, a central column 2, a first magnetic circuit 3, a first vibrating plate 4, a second equalizer 5, foam 6, a first equalizer 7, a groove 8, an equalization groove 9, a through hole 10, an annular bulge 11, a second vibrating plate 12, a second magnetic circuit 13, a base 14, a shell 15, a magnet 16, a diaphragm 17, a voice coil 18 and a radiating block 19.

The embodiment example is shown in the attached figure 1: a double-magnetic-circuit middle-voice compression driving device comprises an upper cover 1, a central column 2, a first magnetic circuit 3, a first vibrating plate 4, a first equalizer 7, a second magnetic circuit 13, a second vibrating plate 12, a second equalizer 5 and a base 14, wherein the upper cover 1, the central column 2 and the base 14 are all made of aluminum, a radiating block 19 is in threaded connection with the upper cover 1, as shown in figure 3, the first magnetic circuit 3 and the second magnetic circuit 13 both comprise a shell 15 and a magnet 16, the magnet 16 is installed in the shell 15, the shell 15 is made of low-carbon steel, the shell 15 of the first magnetic circuit 3 is in threaded connection with the bottom of the upper cover 1, the first vibrating plate 4 is in threaded connection with the first equalizer 7, as shown in figure 4, the first vibrating plate 4 and the second vibrating plate 12 both comprise a voice coil 18 and a diaphragm 17, the voice coil 18 is bonded on the diaphragm 17, the diaphragm 17 is formed by thermoforming of a polyester film, and heat, the first vibrating plate 4 is buckled in a gap between a shell 15 and a magnet 16 of the first magnetic circuit 3 through a voice coil 18, the central column 2 is in threaded connection with the bottom of the upper cover 1, as shown in fig. 2, the size of the central column 2 is gradually reduced from top to bottom, the first equalizer 7 is bonded on the second equalizer 5, the bottom of the second equalizer 5 is in threaded connection with the second vibrating plate 12, the second vibrating plate 12 is buckled in a gap between a shell 15 and a magnet 16 of the second magnetic circuit 13 through a voice coil 18, the second magnetic circuit 13 is in threaded connection with the base 14, foam 6 is bonded at the bottom of the base 14, and the central column 2 is sequentially sleeved in the first magnetic circuit 3, the first vibrating plate 4, the first equalizer 7, the second magnetic circuit 13, the second vibrating plate 12 and the second equalizer 5; as shown in fig. 5 and 6, the first equalizer 7 and the second equalizer 5 each include an annular inner disk and an annular outer disk, the annular outer disk is integrally formed on the periphery of the annular inner disk, a plurality of grooves 8 are circumferentially and uniformly distributed on the bottom side of the annular outer disk, a plurality of arc equalization grooves 9 are circumferentially and uniformly distributed on the bottom side of the annular inner disk, an annular protrusion 11 is arranged on the top of the annular inner disk, the equalization grooves 9 are communicated with a plurality of through holes 10, the through holes 10 are arranged at intervals relative to the equalization grooves 9, and the through holes 10 are circumferentially and uniformly distributed on the annular protrusion 11.

When the heat dissipation device is used, heat can be dissipated through the diaphragm 17 on the first vibration plate 4, the diaphragm 17 on the second vibration plate 12, the first magnetic circuit 3 and the second magnetic circuit 13, the upper cover 1, the central column 2, the base 14, the heat dissipation block 19 and the foam 6 can dissipate heat in an auxiliary mode, the internal temperature of the driving device is prevented from being overhigh, and the service life of the driving device is prolonged; the first vibrating plate 4 and the second vibrating plate 12 can enable the whole driving device to bear larger power input, and can show better performance of conducting sound under the same power, the equalization tanks 9 on the first equalizer 7 and the second equalizer 5 are mutually spliced to form equalization chambers, the equalization chambers form two sound conduction channels, sound is converged to the central column 2 from the two channels formed by the equalization chambers, sound transmission is faster and farther, and the sound quality of the whole driving device is improved.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Double magnetic circuit's middling compression drive arrangement, include from last upper cover that sets gradually down, the center post, first magnetic circuit, first vibration board, first balanced device and base, a serial communication port, still include from last second balanced device that sets gradually down, second vibration board and second magnetic circuit, the second balanced device, the second vibration board, second magnetic circuit sets up between first balanced device and base, the center post suit is in proper order in first magnetic circuit, first vibration board, first balanced device, the second magnetic circuit, second vibration board and second balanced device.

2. The double magnetic circuit medium-pitch compression driving device according to claim 1, wherein: the first magnetic circuit and the second magnetic circuit both comprise a shell and a magnet, the magnet is installed in the shell, and the shell is made of low-carbon steel.

3. The double magnetic circuit medium-pitch compression driving device according to claim 1, wherein: first vibration board and second vibration board all include voice coil loudspeaker voice coil and diaphragm, and the voice coil loudspeaker voice coil bonds on the diaphragm, and heat-resisting glue of voice coil loudspeaker voice coil surface coating, the diaphragm is formed by polyester film thermoforming.

4. The double magnetic circuit medium-pitch compression driving device according to claim 1, wherein: the upper cover, the central column and the base are all made of aluminum.

5. The double magnetic circuit medium-pitch compression driving device according to claim 4, wherein: the upper cover is fixedly connected with a heat dissipation block.

6. The double magnetic circuit medium-pitch compression driving device according to claim 5, wherein: the radiating block is a honeycomb plate.

7. The double magnetic circuit medium-pitch compression driving device according to claim 4, wherein: the size of the central column is gradually reduced from top to bottom.

8. The double magnetic circuit medium-pitch compression driving device according to claim 4, wherein: foam is fixed at the bottom of the base.

9. The double magnetic circuit medium-pitch compression driving device according to claim 7, wherein: first equalizer and second equalizer all include annular inner disc and annular outer dish, and annular outer dish integrated into one piece is in annular inner disc periphery, and the bottom side circumference equipartition a plurality of recess of annular outer dish, the bottom side circumference equipartition of annular inner disc have the curved groove of equaling of a plurality of, and it is protruding that annular inner disc top is equipped with the annular, and the groove intercommunication such as a plurality of has a plurality of through-hole, and the groove interval such as a plurality of through-hole is relative a plurality of sets up, and a plurality of through-hole circumference equipartition is protruding in the annular.