CN107968979B

CN107968979B - Sounding device

Info

Publication number: CN107968979B
Application number: CN201711458266.0A
Authority: CN
Inventors: 赵福彬
Original assignee: Tonly Electronics Holdings Ltd
Current assignee: Tonly Electronics Holdings Ltd
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2024-08-02
Anticipated expiration: 2037-12-27
Also published as: CN107968979A

Abstract

The invention discloses a sound generating device which comprises a bracket, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are fixed on the bracket, the magnetic circuit system comprises a magnetic yoke accommodated in the bracket, outer magnetic steel and inner magnetic steel which are adhered in the magnetic yoke, the outer magnetic steel is arranged around the inner magnetic steel, an outer magnetic gap is formed between the outer magnetic steel and the magnetic yoke, an inner magnetic gap is formed between the outer magnetic steel and the inner magnetic steel, and the vibration system comprises an outer voice coil inserted into the outer magnetic gap, an inner voice coil inserted into the inner magnetic gap and a vibrating diaphragm driven by the outer voice coil and the inner voice coil. The invention sets the inner voice coil and the outer voice coil to drive the same vibrating diaphragm, thereby playing high-frequency sound and low-frequency sound, realizing full-range playing and reducing the thickness of the sounding device.

Description

Sounding device

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a sound generating device.

Background

Speakers are electroacoustic transducers capable of converting an electrical signal into an acoustic signal and radiating the acoustic signal into the air, and are widely used in present electronic products. The loudspeaker generally comprises a magnetic circuit system, a vibration system and a support system. The voice coil of the vibration system is electrified to generate an induction magnetic field, the induction magnetic field and the magnetic field of the magnetic circuit system act together to generate upward or downward acting force, the vibrating diaphragm of the vibration system is driven to vibrate, and air is pushed to make sound.

In the prior art, in order to realize full-range playing, a bass vibration system and a treble vibration system are simultaneously arranged in the same loudspeaker, and two sets of vibration systems are needed, so that the thickness of a product is larger.

Therefore, it is necessary to provide a new sound emitting device.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and aims to solve the technical problem that a loudspeaker with a full-range playing function is large in thickness.

In order to achieve the above purpose, the sound generating device provided by the invention comprises a bracket, a magnetic circuit system and a vibration system, wherein the magnetic circuit system is fixed on the bracket, the magnetic circuit system comprises a magnet yoke accommodated in the bracket, outer magnetic steel and inner magnetic steel which are adhered to the magnet yoke, the outer magnetic steel is arranged around the inner magnetic steel, an outer magnetic gap is formed between the outer magnetic steel and the magnet yoke, an inner magnetic gap is formed between the outer magnetic steel and the inner magnetic steel, and the vibration system comprises an outer voice coil inserted into the outer magnetic gap, an inner voice coil inserted into the inner magnetic gap, and a vibrating diaphragm driven by the outer voice coil and the inner voice coil.

Preferably, the magnetic circuit system further comprises an outer washer attached to one side of the outer magnetic steel, which is close to the vibrating diaphragm, and an inner washer attached to one side of the inner magnetic steel, which is close to the vibrating diaphragm.

Preferably, the vibrating diaphragm comprises a middle ring, a ring-folding part surrounding the middle ring and connected with the middle ring, and a fixing part surrounding the ring-folding part and connected with the ring-folding part, wherein the fixing part is connected with the bracket, the outer voice coil is connected with the edge of the middle ring, which is close to the ring-folding part, and the inner voice coil is connected with the edge of the middle ring, which is far away from the ring-folding part.

Preferably, the vibration system further comprises a dustproof cap arranged in the center of the vibrating diaphragm and covering the inner voice coil and the inner magnetic steel, and the edge of the dustproof cap is connected with the middle ring.

Preferably, a pressure release cavity is formed between the dustproof cap and the inner washer, and a pressure release channel is formed in the centers of the inner washer, the inner magnetic steel and the magnetic yoke and is communicated with the pressure release cavity and the external space.

Preferably, the vibration system further comprises an elastic support member arranged below the inner voice coil and used for elastically supporting the inner voice coil, an outer edge of the elastic support member is fixed between the outer magnetic steel and the magnetic yoke, and an inner edge of the elastic support member is connected with the inner voice coil.

Preferably, the elastic support piece is sleeved on the inner magnetic steel, and a plurality of corrugations which sequentially encircle the inner magnetic steel are arranged on the elastic support piece.

Preferably, the magnetic yoke comprises a bottom wall, a side wall extending from the edge of the bottom wall to the vibrating diaphragm, a first mounting table and a second mounting table extending from the bottom wall to the vibrating diaphragm, wherein the first mounting table surrounds the second mounting table, the outer magnetic steel is attached to the first mounting table, and the inner magnetic steel is attached to the second mounting table.

Preferably, the magnetic yoke is provided with a pressure relief hole communicated with the inner magnetic gap.

Preferably, the magnetic circuit system further comprises a conductive terminal fixed on the bracket, the conductive terminal is electrically connected with the inner voice coil and the outer voice coil through wires, and the inner voice coil and the outer voice coil are connected in parallel.

According to the technical scheme, the vibrating diaphragm is driven by the inner voice coil and the outer voice coil, so that the sounding device can emit high-frequency sound and low-frequency sound; through setting up interior voice coil loudspeaker voice coil and outer voice coil loudspeaker voice coil sharing a vibrating diaphragm, support, yoke to avoided adopting the scheme of two sets of vibration systems among the prior art, reduced the thickness of sound generating device, be favorable to the slim setting of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an embodiment of a sound device of the present invention;

FIG. 2 is a schematic diagram of an exploded view of an embodiment of a sound emitting device of the present invention;

FIG. 3 is a schematic cross-sectional view of the sound emitting device of FIG. 1 along line A-A;

FIG. 4 is a schematic cross-sectional view of the sound emitting device of FIG. 1 along line B-B;

FIG. 5 is an enlarged schematic view of a portion of the sound emitting device C shown in FIG. 4;

FIG. 6 is a chart of a magnetic flux test inside an inner voice coil of an embodiment of a sound emitting device of the present invention;

FIG. 7 is a chart of a magnetic flux test on the outside of an inner voice coil of an embodiment of a sound emitting device of the present invention;

FIG. 8 is a magnetic flux test chart of an outer voice coil of an embodiment of a sound emitting device of the present invention;

Fig. 9 is an audio test chart of an embodiment of a sound device of the present invention.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				100	Sounding device	1	Support frame
3	Magnetic circuit system	31	Magnetic yoke
				311	Bottom wall	312	Pressure relief hole
313	Side wall	315	First mounting table
				317	Second mounting table	319	Mounting step
3191	Mounting surface	3193	Side surface
				32	External magnetic gap	33	Outer magnetic steel
34	Inner magnetic gap	35	Inner magnetic steel
				36	Pressure relief channel	37	External washer
39	Chinese style food	5	Vibration system
				51	External voice coil	52	Pressure relief cavity
53	Inner voice coil	55	Vibrating diaphragm
				551	Intermediate ring	553	Folded ring part
555	Fixing part	57	Dust cap
				59	Elastic support	7	Conductive terminal

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the specific gesture sounds to change, the directional indicators correspondingly change.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

The invention provides a sound generating device.

Referring to fig. 1 to 3, in an embodiment of the present invention, the sound generating device 100 includes a support 1, a magnetic circuit 3 fixed on the support 1, and a vibration system 5, wherein the magnetic circuit 3 includes a yoke 31 accommodated in the support 1, an outer magnetic steel 33 and an inner magnetic steel 35 attached to the yoke 31, the outer magnetic steel 33 is disposed around the inner magnetic steel 35, an outer magnetic gap 32 is formed between the outer magnetic steel 33 and the yoke 31, an inner magnetic gap 34 is formed between the outer magnetic steel 33 and the inner magnetic steel 35, and the vibration system 5 includes an outer voice coil 51 inserted into the outer magnetic gap 32, an inner voice coil 53 inserted into the inner magnetic gap 34, and a diaphragm 55 driven by the outer voice coil 51 and the inner voice coil 53.

Specifically, the outer voice coil 51 and the inner voice coil 53 are electrified, the outer voice coil 51 generates an induction magnetic field, and the vibrating diaphragm 55 is driven to vibrate and sound under the combined action of the magnetic fields of the magnetic circuit system 3; the inner voice coil 53 generates an induced magnetic field and drives the vibrating diaphragm 55 to vibrate and sound under the combined action of the induced magnetic field and the magnetic field of the magnetic circuit system 3; the diaphragm 55 is driven to vibrate by the inner voice coil 53 and the outer voice coil 51, respectively, so that a low frequency sound or a high frequency sound can be obtained.

In the present invention, the diaphragm 55 is driven by providing the inner voice coil 53 and the outer voice coil 51, so that the sound generating device 100 can generate high frequency sound and low frequency sound; through setting up a vibrating diaphragm 55, support 1, yoke 31 of interior voice coil loudspeaker voice coil 53 and outer voice coil loudspeaker voice coil 51 sharing to avoided adopting the scheme of two sets of vibration systems among the prior art, reduced the thickness of sound generating device 100, be favorable to the slim setting of product.

Further, the magnetic circuit system 3 further includes an outer washer 37 attached to a side of the outer magnetic steel 33 near the diaphragm 55 and an inner washer 39 attached to a side of the inner magnetic steel 35 near the diaphragm 55. Specifically, the outer washer 37 and the inner washer 39 are magnetic conductors, and the arrangement of the outer washer 37 and the inner washer 39 is beneficial to improving the sensitivity and reducing the tone quality distortion. In this embodiment, the outer magnet steel 33, the inner magnet steel 35, the outer washer 37 and the inner washer 39 are all annular structures, and in other embodiments, the outer magnet steel 33, the inner magnet steel 35, the outer washer 37 and the inner washer 39 may be other shapes, for example: a plurality of square outer magnet steels 33 form a ring shape.

Still further, the diaphragm 55 includes a middle ring 551, a ring folding portion 553 surrounding the middle ring 551 and connected with the middle ring 551, and a fixing portion 555 surrounding the ring folding portion 553 and connected with the ring folding portion 553, the fixing portion 555 is connected with the bracket 1, the outer voice coil 51 is connected with an edge of the middle ring 551 near the ring folding portion 553, and the inner voice coil 53 is connected with an edge of the middle ring 551 far away from the ring folding portion 553. The inner voice coil 53 and the outer voice coil 51 are connected with different positions of the middle ring 551, so that the inner voice coil 53 or the outer voice coil 51 is controlled to drive the diaphragm 55 to emit high-frequency sound or low-frequency sound.

In yet another embodiment, the vibration system 5 further includes a dust cap 57 provided at the center of the diaphragm 55 and covering the inner voice coil 53 and the inner magnetic steel 35, and an edge of the dust cap 57 is connected to the intermediate ring 551. By providing the dust cap 57, external impurities can be prevented from entering the sound emitting device 100.

Further, a pressure release cavity 52 is formed between the dust cap 57 and the inner washer 39, and a pressure release channel 36 is formed in the centers of the inner washer 39, the inner magnetic steel 35 and the magnetic yoke 31 to communicate the pressure release cavity 52 with an external space. The pressure relief channel 36 is provided to facilitate sound production by the sound production device 100.

In one embodiment, the vibration system 5 further includes an elastic support member 59 disposed under the inner voice coil 53 for elastically supporting the inner voice coil 53, wherein an outer edge of the elastic support member 59 is fixed between the outer magnetic steel 33 and the yoke 31, and an inner edge of the elastic support member 59 is connected with the inner voice coil 53. The elastic support 59 is advantageous in maintaining stability of the inner voice coil 53 when it moves, and in maintaining stability of the connection of the inner voice coil 53 to the diaphragm 55. Specifically, the elastic supporting member 59 may be a centering support, a plurality of elastic arms having elasticity and having both ends connected to the inner voice coil 53 and the outer magnetic steel 33, respectively, or a sheet structure having elasticity and having both ends connected to the inner voice coil 53 and the outer magnetic steel 33, respectively.

Further, the elastic support member 59 is sleeved on the inner magnetic steel 35, and a plurality of corrugations sequentially surrounding the inner magnetic steel 35 are arranged on the elastic support member 59. The resonance efficiency of the sounding device is facilitated by the arrangement of the corrugations.

Referring to fig. 4, the yoke 31 includes a bottom wall 311, a side wall 313 extending from an edge of the bottom wall 311 toward the diaphragm 55, a first mounting table 315 and a second mounting table 317 extending from the bottom wall 311 toward the diaphragm 55, the first mounting table 315 is disposed around the second mounting table 317, the outer magnetic steel 33 is attached to the first mounting table 315, and the inner magnetic steel 35 is attached to the second mounting table 317. By providing the first mounting table 315 and the second mounting table 317, the stroke of the diaphragm 55 can be increased, and the amounts of the inner magnetic steel 35 and the outer magnetic steel 33 can be reduced.

Referring to fig. 5, the first mounting base 315 is provided with a mounting step 319, and the mounting step 319 includes a mounting surface 3191 extending from a surface of the first mounting base 315 adjacent to the second mounting base 317 in a direction adjacent to the side wall 313, and a side surface 3193 extending from the mounting surface 3191 in a direction adjacent to the diaphragm 55, and the elastic support member 59 is connected to the mounting surface 3191. By providing the mounting step 319, the fixation of the elastic support member 59 is facilitated, and the stability of the elastic support member 59 is increased.

Referring again to fig. 4, the yoke 31 is provided with a pressure relief hole 312 in communication with the inner magnetic gap 34. The pressure relief holes 312 are communicated with the inner magnetic gap 34, so that the inner voice coil 53 is beneficial to driving the vibrating diaphragm 55 to vibrate. Preferably, through holes are formed on the outer voice coil 51 to communicate with two sides of the outer voice coil 51, so that the outer voice coil 51 drives the diaphragm 55 to vibrate.

The magnetic circuit system 3 further comprises a conductive terminal 7 fixed on the bracket 1, the conductive terminal 7 is electrically connected with the inner voice coil 53 and the outer voice coil 51 through wires, and the inner voice coil 53 and the outer voice coil 51 are connected in parallel. So that the energization of the inner voice coil 53 and the outer voice coil 51 can be controlled, respectively. Preferably, a first wire (not shown) is provided to connect the conductive terminal 7 and the outer voice coil 51, and a second wire (not shown) is provided to connect the inner voice coil 53 in parallel with the first wire, so as to reduce the amount of the inner wire of the sound emitting device 100.

Referring to fig. 6 to 8, fig. 6 is a magnetic flux test chart of the inner side of the inner voice coil of an embodiment of the sound generating device of the present invention, fig. 7 is a magnetic flux test chart of the outer side of the inner voice coil of an embodiment of the sound generating device of the present invention, and fig. 8 is a magnetic flux test chart of the outer voice coil of an embodiment of the sound generating device of the present invention. As can be seen from the curves in fig. 6, 7 and 8, the inner voice coil 35 and the outer voice coil 33 of the sound emitting device 100 each have a high magnetic flux.

Referring to fig. 9, an audio test chart of an embodiment of the sound generating device of the present invention is shown in fig. 9, and it can be seen that the sound generating device 100 can achieve an effective bandwidth of 50 Hz-20 KHz, and can meet the playing requirement of full audio.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather utilizing equivalent structural changes made in the present invention description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. The sound production device comprises a bracket, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are fixed on the bracket, and the sound production device is characterized in that the magnetic circuit system comprises a magnetic yoke accommodated in the bracket, outer magnetic steel and inner magnetic steel which are attached to the magnetic yoke, wherein the outer magnetic steel is arranged around the inner magnetic steel, an outer magnetic gap is formed between the outer magnetic steel and the magnetic yoke, an inner magnetic gap is formed between the outer magnetic steel and the inner magnetic steel, and the vibration system comprises an outer voice coil inserted into the outer magnetic gap, an inner voice coil inserted into the inner magnetic gap, and a vibrating diaphragm driven by the outer voice coil and the inner voice coil;

The magnetic yoke comprises a bottom wall, a side wall extending from the edge of the bottom wall to the vibrating diaphragm, a first mounting table and a second mounting table extending from the bottom wall to the vibrating diaphragm, wherein the first mounting table surrounds the second mounting table, the outer magnetic steel is attached to the first mounting table, and the inner magnetic steel is attached to the second mounting table;

The first mounting table is provided with a mounting step, and the mounting step comprises a mounting surface extending from the surface of the first mounting table, which is close to the second mounting table, to a direction, which is close to the side wall, and a side surface extending from the mounting surface to the direction, which is close to the vibrating diaphragm;

The vibration system further comprises an elastic supporting piece which is arranged below the inner voice coil and used for elastically supporting the inner voice coil, the outer edge of the elastic supporting piece is fixed on the mounting surface, and the inner edge of the elastic supporting piece is connected with the inner voice coil.

2. The sound generating device as recited in claim 1, wherein the magnetic circuit further comprises an outer washer attached to a side of the outer magnetic steel adjacent to the diaphragm and an inner washer attached to a side of the inner magnetic steel adjacent to the diaphragm.

3. The sound generating device as recited in claim 2, wherein the diaphragm comprises a middle ring, a ring-folded portion surrounding and connected to the middle ring, and a fixing portion surrounding and connected to the ring-folded portion, the fixing portion being connected to the bracket, the outer voice coil being connected to an edge of the middle ring near the ring-folded portion, and the inner voice coil being connected to an edge of the middle ring away from the ring-folded portion.

4. The sound emitting device of claim 3, wherein the vibration system further comprises a dust cap disposed in the center of the diaphragm and covering the inner voice coil and the inner magnetic steel, and wherein an edge of the dust cap is connected to the intermediate ring.

5. The sound generating device as claimed in claim 4, wherein a pressure release chamber is formed between the dust cap and the inner washer, and a pressure release channel is formed at the centers of the inner washer, the inner magnetic steel and the magnetic yoke to communicate the pressure release chamber with an external space.

6. The sound generating device as claimed in claim 1, wherein the elastic support member is sleeved on the inner magnetic steel, and a plurality of corrugations are provided on the elastic support member, which sequentially surround the inner magnetic steel.

7. The sound emitting device of any one of claims 1-6, wherein the yoke is provided with a pressure relief hole in communication with the inner magnetic gap.

8. The sound generating device as claimed in any one of claims 1 to 6, wherein the magnetic circuit system further comprises a conductive terminal fixed to the bracket, the conductive terminal being electrically connected to the inner voice coil and the outer voice coil through a wire, the inner voice coil and the outer voice coil being connected in parallel.