WO2022006933A1

WO2022006933A1 - Sound production device

Info

Publication number: WO2022006933A1
Application number: PCT/CN2020/102059
Authority: WO
Inventors: 肖波; 令狐荣林; 孔晨亮; 章统
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-07-08
Filing date: 2020-07-15
Publication date: 2022-01-13
Also published as: CN212628397U

Abstract

Provided is a sound production device. The sound production device comprises a loudspeaker unit; and the sound production device further comprises a housing, a support connecting the loudspeaker unit and the housing, a first isolation net with a periphery connected to an inner wall of the support, and a lower clamping plate fixed to a surface of the first isolation net that faces the loudspeaker unit, wherein the housing, the support, the first isolation net and the lower clamping plate define a sound absorption cavity for accommodating a sound absorption material in a surrounding mode; and the lower clamping plate is provided with a heat dissipation protrusion which extends towards the housing and makes contact with an inner wall of the housing. The lower clamping plate and the housing are both metal members; the lower clamping plate is directly opposite the loudspeaker unit; the housing is in communication with an external environment; and the lower clamping plate makes contact with the inner wall of the housing to form a metal heat dissipation channel, such that heat generated by the loudspeaker unit is sequentially transferred from the lower clamping plate to the housing, and then to the external environment, and the heat dissipation effect of the loudspeaker unit is effectively improved.

Description

sound device

technical field

The utility model relates to the technical field of loudspeakers, in particular to a sound producing device.

Background technique

In the prior art, in order to achieve the effect of adjusting the low frequency, a shell structure needs to be additionally provided on the equipment for installing the sound-generating unit to form a back cavity, and an air-permeable spacer should be bonded between the sound-generating unit and the shell structure to A sound absorbing material is filled between the breathable spacer and the shell structure. The rear cavity filled with the sound-absorbing material is not conducive to the heat dissipation of the speaker unit.

technical problem

The purpose of the present invention is to provide a sounding device that can dissipate heat well.

technical solutions

The technical scheme of the present utility model is as follows:

A sound-generating device comprising a speaker unit, the sound-generating device further comprising a housing, a bracket connecting the speaker unit and the housing, and a first isolation net connected with the inner wall of the bracket, the speaker unit There is a lower splint contacting with the first isolation net, the shell, the bracket, the first isolation net and the lower splint are surrounded to form a sound-absorbing cavity for accommodating sound-absorbing materials, and the lower splint is provided with a sound-absorbing cavity toward the A heat dissipation protrusion extending in the direction of the casing and in contact with the inner wall of the casing.

Preferably, the inner wall of the bracket is provided with a groove extending in the direction of the outer wall of the bracket, and the outer peripheral edge of the first isolation net is fixedly connected in the groove.

Preferably, the casing is a metal casing, and the bracket is provided with a through hole for the heat dissipation protrusion to pass through and contact with the inner wall of the casing.

Preferably, the speaker unit includes a vibration system, a magnetic circuit system, and an annular support plate connecting the vibration system and the bracket, and the magnetic circuit system further includes a main magnetic circuit assembly fixed on the lower plate, an upper splint fixed on the annular support plate, a secondary magnetic steel located between the upper splint and the lower splint and spaced from the main magnetic circuit assembly to form a magnetic gap, the vibration system includes a secondary magnetic steel fixed on the annular support The upper vibrating membrane of the support plate, the voice coil inserted in the magnetic gap, the skeleton for fixing the voice coil and the upper vibrating membrane, and the dome structure connected with the skeleton.

Preferably, the main magnetic circuit assembly includes a main magnetic steel located on the lower clamping plate and a main pole core stacked on the main magnetic steel, and the auxiliary magnetic steel is a ring magnetic steel structure and is sleeved on the main magnetic steel. The main magnetic steel forms the magnetic gap outside the main pole core.

Preferably, a first sound absorbing hole, a second sound absorbing hole and a third sound absorbing hole penetrating the sound absorbing cavity are sequentially arranged on the lower splint, the main magnet steel and the main pole core, and the magnetic circuit system further includes a cover arranged on a The second isolation net on the third sound-absorbing hole.

Preferably, the speaker unit further includes a support assembly, the support assembly includes an elastic conductive member electrically connected to the voice coil and an elastic conductive member opposite to the dome and sandwiched between the frame and the annular support plate between the lower diaphragm.

Preferably, the outer periphery of the annular support plate in the direction of the bracket is provided with a first fastener, and the outer periphery of the bracket in the direction of the annular support plate is provided with a first fastener adapted to the first fastener. Two snap fasteners.

Preferably, the outer periphery of the lower clamping plate is provided with a first step, and the inner periphery of the first isolation net is provided with a second step fixedly connected with the first step.

Preferably, the sounding device further comprises a connection gasket arranged between the casing and the bracket.

beneficial effect

The beneficial effects of the present utility model are:

In this solution, a sound-absorbing cavity for accommodating sound-absorbing materials is formed by surrounding the shell, the bracket, the first isolation net and the lower splint, thereby achieving the effect of improving the low-frequency sound of the speaker unit. The lower splint is in contact with the inner wall of the shell to form a heat dissipation channel, so that the heat generated by the speaker unit can be transferred from the lower splint to the shell and then transferred to the external environment, which effectively improves the heat dissipation effect of the speaker unit. When the shell is made of metal, Better cooling effect.

Description of drawings

Fig. 1 is the structural representation of the sound-emitting device of the present invention;

2 is a schematic diagram of the first exploded structure of the sound-emitting device of the present invention;

Fig. 3 is the sectional view along the A-A direction in Fig. 1;

Fig. 4 is a partial enlarged view of part B in Fig. 3;

5 is a schematic diagram of the partial connection structure of the lower splint and the bracket of the present invention;

6 is a schematic diagram of a second exploded structure of the sound-emitting device of the present invention;

7 is a schematic diagram of a third exploded structure of the sound-emitting device of the present invention;

FIG. 8 is a schematic structural diagram of the skeleton of the present invention.

Embodiments of the present invention

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

Please refer to FIGS. 1-5 , the present invention discloses a sound-generating device, which includes a speaker unit 1 , the sound-generating device further includes a housing 2 , a bracket 3 connecting the speaker unit 1 and the housing 2 , and a perimeter and the bracket 3 . The first isolation net 4 connected to the inner wall, the speaker unit is provided with a lower splint that is in contact with the first isolation mesh, and the shell 2, the bracket 3, the first isolation mesh 4 and the lower splint 123 are surrounded to form an accommodation. In the sound-absorbing cavity 20 of the sound-absorbing material, the lower plate 123 is provided with a heat-dissipating protrusion 1231 extending toward the direction of the casing 2 and in contact with the inner wall of the casing 2 . The casing 2 is a metal casing, the lower clamping plate 123 is a metal clamping plate, and the heat dissipation protrusion 1231 and the lower clamping plate 123 are integrally formed.

Compared with the prior art, in this solution, a sound-absorbing cavity 20 for accommodating sound-absorbing materials is formed around the shell 2 , the bracket 3 , the first isolation net 4 and the lower splint 123 , thereby achieving the effect of improving the low-frequency sound of the speaker unit 1 . The lower splint 123 is in contact with the inner wall of the housing 2 to form a metal heat dissipation channel, so that the heat generated by the speaker unit 1 can be transferred from the lower splint 123 to the housing 2 and then transferred to the external environment, effectively improving the heat dissipation effect of the speaker unit 1 , When the shell is metal, the heat dissipation effect is better.

4 , the inner wall of the bracket 3 is provided with a groove 31 extending toward the outer wall of the bracket 3 , and the outer periphery of the first isolation net 4 is fixedly connected in the groove 31 . The outer peripheral edge of the first isolation net 4 is stably injected on the bracket 3 by inserting it into the groove 31 .

In this embodiment, the bracket 3 is provided with a through hole 32 through which the heat dissipation protrusion 1231 of the lower clamping plate 123 passes and is in contact with the inner wall of the housing 2 . The outer edge of the first isolation net 4 is arranged on the inner wall of the bracket 3, and the lower splint 123 is arranged on the inner periphery of the first isolation mesh 4. Part of the lower splint 123 extends out of the first isolation mesh 4 and passes through the bracket 3 in order to connect with the shell. The body 2 is in contact, and the arrangement of the through hole 32 can not only realize the contact between the lower clamping plate 123 and the inner wall of the casing 2 , but also increase the stability of the fixing of the casing 2 .

In this embodiment, the outer periphery of the lower clamping plate 123 is provided with a first step 1233 , and the inner periphery of the first isolation net 4 is provided with a second step 41 fixedly connected with the first step 1233 . The lower splint 123 and the first isolation net 4 are connected by injection molding through the matching of the first step 1233 and the second step 41, and the injection molding structure is more stable.

In this embodiment, the sound generating device further includes a connection gasket 5 arranged between the casing 2 and the bracket 3 . The outer periphery of the bracket 3 is provided with a connection table 33 that is fixedly connected to the shell 2 , the connection gasket 5 is fixed on the connection table 33 , and the outer edge of the shell 2 is provided with a plurality of protrusions that match the shape of the connection gasket 5 . Position 21, the raised position 21 is fixed on the connection gasket 5 to realize the fixed connection between the shell 2 and the bracket 3.

The shell 2 is also provided with a powder filling hole 22 for filling the sound-absorbing material and an air guide hole 23 for easy ventilation. The diameter of the powder filling hole 22 is larger than that of the air guide hole 23 . The powder filling hole 22 is provided with a powder filling cover 24, and the air guide hole 23 is provided with an air guide cover 25.

In this embodiment, a buffer groove 1234 is recessed on the surface of the lower clamping plate 123 . Generally speaking, the most heat is generated in the magnetic gap 10 of the speaker unit 1. The provision of the buffer groove 1234 can increase the contact area between the lower splint 123 and the magnetic gap 10 on the one hand, and improve the heat dissipation effect; on the other hand, avoid the speaker unit 1 If the vibration amplitude of the vibration system is too large, the lower clamping plate 123 is damaged.

6-7, the speaker unit 1 includes a vibration system 11, a magnetic circuit system 12, and an annular support plate 14 connecting the vibration system 11 and the bracket 3. The lower clamping plate 123 is arranged in the magnetic circuit system 12. The magnetic circuit system 12 It also includes a main magnetic circuit assembly 121 fixed on the lower clamp plate 123, an upper clamp plate 124 fixed on the annular support plate 14, and a secondary clamp located between the upper clamp plate 124 and the lower clamp plate 123 and spaced from the main magnetic circuit assembly 121 to form a magnetic gap 10. Magnetic steel 122, the vibration system 11 includes an upper diaphragm 111 fixed on the annular support plate 14, a voice coil 112 inserted in the magnetic gap 10, a frame 113 for fixing the voice coil 112 and the upper diaphragm 111, and a ball connected to the frame 113 Top structure 114 . The voice coil 112 is inserted into the magnetic gap 10. When an alternating current is passed through, under the action of the magnetic field of the main magnetic circuit assembly 121 and the auxiliary magnetic circuit assembly 122, the voice coil 112 will receive an alternating driving force, generating The alternating motion causes the upper diaphragm 111 to vibrate along the vibration direction of the voice coil 112 under the support of the dome structure 114, thereby producing sound.

Specifically, the main magnetic circuit assembly 121 includes a main magnetic steel 1211 located on the lower clamp plate 123 and a main pole core 1212 stacked on the main magnetic steel 1211 . The auxiliary magnetic steel 122 and the upper clamp plate 124 are sleeved on the main magnetic steel 1211 and the main magnetic steel 1211 . The main pole core 1212 is outside and forms the magnetic gap 10 .

Specifically, a first sound-absorbing hole 1232, a second sound-absorbing hole 1211a, and a third sound-absorbing hole 1212a are formed on the lower splint 123, the main magnetic steel 1211, and the main pole core 1212 in sequence. The magnetic circuit system 12 also includes a cover The second isolation net 13 on the third sound-absorbing hole 1212a. The arrangement of the first sound absorbing hole 1232 , the second sound absorbing hole 1211 a and the third sound absorbing hole 1212 a can further increase the volume of the sound absorbing cavity and realize the filling of more sound absorbing materials, thereby achieving a more stable sounding effect at low frequencies.

Specifically, the speaker unit 1 further includes a support assembly 15 , and the support assembly 15 includes an elastic conductive member 151 electrically connected to the voice coil 112 and a lower portion opposite to the dome structure 114 and sandwiched between the frame 113 and the annular support plate 14 . Diaphragm 152 .

The bottom of the annular support plate 14 is provided with two oppositely arranged bayonet openings 142. The annular support plate 14 clamps the protrusion 1241 on the upper splint 124 on the bracket 3 through the bayonet openings 142, so that the weight of the magnetic circuit system 12 is transmitted to the bracket 3. On the housing 2, a more stable fixation of the magnetic circuit system 12 is realized.

Referring further to FIG. 8 , the frame 113 includes two vertically spaced first side support arms 1131 , a ring-shaped second side support arm 1132 spaced apart from the first side support arms 1131 , and connected to the first side support arms 1131 and the lateral connecting arm 1133 of the second side arm 1132, the lateral connecting arm 1133 is connected to the dome structure 114, the end of the first side arm 1131 away from the lateral connecting arm 1133 is connected to the elastic conductive member 151, and the second side arm 1131 is connected to the elastic conductive member 151. One end of the arm 1132 away from the transverse connecting arm 1133 is connected to the voice coil 112 so that an alternating driving force can be generated in the magnetic circuit system 12 .

The spherical top structure 114 is an annular structure adapted to the structure of the frame 113 , and the lower diaphragm 152 is two sheet-like structures symmetrically opened at the connection between the frame 113 and the annular support plate 14 . The dome structure 114 , the lower diaphragm 152 and the elastic conductive member 151 are all elastic components, which can drive and restore the vibration process of the upper diaphragm 111 to a certain extent.

In this embodiment, the outer periphery of the annular support plate 14 in the direction of the bracket 3 is provided with a first fastener 141 , and the outer periphery of the bracket 3 in the direction of the annular support plate 14 is provided with a second fastener adapted to the first fastener 141 . Buckle 34 . The speaker unit 1 and the bracket 3 are fixed by the cooperation of the first buckle 141 and the second buckle 34 , and the fixing structure is stable and easy to disassemble.

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to the present utility model. A new range of protection.

Claims

A sound-generating device comprising a speaker unit, characterized in that the sound-generating device further comprises a housing, a bracket connecting the speaker unit and the housing, and a first isolation net connected to the inner wall of the bracket, so The speaker unit is provided with a lower splint that is in contact with the first isolation net, the shell, the bracket, the first isolation net and the lower splint are surrounded to form a sound-absorbing cavity for accommodating sound-absorbing materials, and the lower splint is provided with a sound-absorbing cavity. There are heat dissipating protrusions extending toward the casing and in contact with the inner wall of the casing.
The sounding device according to claim 1, wherein the shell is a metal shell, and the bracket is provided with a through hole for the heat dissipation protrusion to pass through and contact with the inner wall of the shell .
The sound-generating device according to claim 1, wherein the speaker unit comprises a vibration system, a magnetic circuit system, and an annular support plate connecting the vibration system and the bracket, and the magnetic circuit system further comprises a The main magnetic circuit assembly on the lower clamping plate, the upper clamping plate fixed on the annular support plate, and the auxiliary magnetic steel located between the upper clamping plate and the lower clamping plate and spaced from the main magnetic circuit assembly to form a magnetic gap , the vibration system includes an upper diaphragm fixed on the annular support plate, a voice coil inserted in the magnetic gap, a frame for fixing the voice coil and the upper diaphragm, and a dome structure connected with the frame.
The sounding device according to claim 3, wherein the main magnetic circuit assembly comprises a main magnetic steel located on the lower plate and a main pole core stacked on the main magnetic steel, the auxiliary magnetic The steel has a ring-shaped magnetic steel structure and is sleeved outside the main magnetic steel and the main pole core to form the magnetic gap.
The sound-generating device according to claim 4, characterized in that a first sound-absorbing hole, a second sound-absorbing hole, and a third sound-absorbing hole penetrating the sound-absorbing cavity are sequentially formed on the lower splint, the main magnet steel, and the main pole core. , the magnetic circuit system further includes a second isolation net covered on the third sound-absorbing hole.
The sound-generating device according to claim 3, wherein the speaker unit further comprises a support assembly, the support assembly includes an elastic conductive member electrically connected to the voice coil, and an elastic conductive member that is opposite to the dome structure and clamped The lower diaphragm is arranged between the frame and the annular support plate.
The sounding device according to claim 6, wherein the outer circumference of the annular support plate in the direction of the bracket is provided with a first fastener, and the outer circumference of the bracket in the direction of the annular support plate is provided with The second snap fittings are adapted to the first snap fittings.
The sounding device according to claim 1, wherein the outer periphery of the lower clamping plate is provided with a first step, and the inner periphery of the first isolation net is provided with a second step fixedly connected with the first step .
The sounding device according to claim 1, wherein the inner wall of the bracket is provided with a groove extending toward the outer wall of the bracket, and the outer peripheral edge of the first isolation net is fixedly connected in the groove .
The sound-generating device according to claim 1, characterized in that, the sound-generating device further comprises a connection gasket provided between the housing and the bracket.