CN111417055A

CN111417055A - Vibration system, sound production device and electronic product

Info

Publication number: CN111417055A
Application number: CN202010241025.6A
Authority: CN
Inventors: 蔡晓东
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-07-14
Anticipated expiration: 2040-03-30
Also published as: CN111417055B

Abstract

The invention discloses a vibration system, a sound generating device and an electronic product, wherein the sound generating device comprises a magnetic circuit system and a vibration system, a magnetic gap is formed in the magnetic circuit system, the vibration system comprises a voice coil framework and a voice coil, the voice coil framework is provided with an extending end which is arranged corresponding to the magnetic circuit system of the sound generating device, the voice coil is fixedly arranged on the voice coil framework, at least part of the voice coil extends to the end part of the extending end and is arranged opposite to the end part of the extending end, so that at least part of the voice coil is overlapped with the extending end in the length direction of the voice coil framework; the sound production device provided by the invention can ensure the acoustic performance while considering small size.

Description

Vibration system, sound production device and electronic product

Technical Field

The invention relates to the technical field of electroacoustic products, in particular to a vibration system, a sound production device and an electronic product.

Background

With the progress of society and the development of science and technology, consumers have higher and higher requirements on electronic products, especially mobile intelligent electronic products, taking wearable devices such as smart watches, smart bracelets, smart earphones and smart glasses as examples, the development trend is more and more miniaturized and light and thin, and a sound generating device is taken as an important component of the electronic products, and is inevitably required to be developed towards the miniaturization and light and thin directions.

Disclosure of Invention

The invention mainly aims to provide a vibration system, a sound production device and an electronic product, and aims to solve the problem that the sound production device in the prior art cannot meet the requirements of small size and performance.

To achieve the above object, the present invention provides a vibration system for use in a sound generating apparatus, the vibration system including:

the voice coil framework is provided with an extension end which is arranged corresponding to a magnetic circuit system of the sound generating device; and the number of the first and second groups,

and the voice coil is fixedly arranged on the voice coil framework, at least part of the voice coil extends to the end part of the extension end, and the end part of the extension end is arranged oppositely, so that the voice coil is overlapped with the extension end at least in part in the length direction of the voice coil framework.

Optionally, the voice coil comprises:

the outer voice coil section is arranged opposite to the end part of the extension end, so that the outer voice coil section and the extension end are overlapped in the length direction of the voice coil framework; and the number of the first and second groups,

the voice coil comprises an outer voice coil section, an inner voice coil section and a voice coil framework, wherein the outer voice coil section is arranged on the inner side of the outer voice coil section, the inner voice coil section protrudes out of the outer voice coil section in the direction close to the voice coil framework, and the part, protruding out of the outer voice coil section, of the inner voice coil section is arranged on the inner side of the voice coil framework.

Optionally, in an outside direction of the voice coil bobbin, an outer side surface of the voice coil bobbin is located within the outside voice coil section.

Optionally, the voice coil bobbin further includes a mounting end opposite to the extension end, and the vibration system further includes a dome integrally connected to the mounting end.

Optionally, the dome and the voice coil former are integrally formed.

Optionally, the ball top and the voice coil bobbin are made of metal.

Optionally, the ball top and the voice coil bobbin are made of aluminum or aluminum magnesium alloy.

Optionally, the dome has a first side facing the voice coil bobbin and a second side facing away from the voice coil bobbin, and the first side and/or the second side of the dome are concave-convex.

The present invention also provides a sound generating apparatus comprising:

a magnetic circuit system formed with a magnetic gap; and the number of the first and second groups,

the vibration system comprises a voice coil framework and a voice coil, wherein the voice coil framework is provided with an extending end used for corresponding to a magnetic circuit system of the sound generating device, the voice coil is fixedly installed on the voice coil framework, at least part of the voice coil extends to the end part of the extending end, the end part of the extending end is arranged oppositely, so that the voice coil framework is arranged in the length direction, at least part of the voice coil is overlapped with the extending end, and the voice coil extends into the magnetic gap.

The invention further provides an electronic product, which comprises a sound generating device, wherein the sound generating device comprises a magnetic circuit system and a vibration system, a magnetic gap is formed in the magnetic circuit system, the vibration system comprises a voice coil framework and a voice coil, the voice coil framework is provided with a first end and a second end which are oppositely arranged, the first end of the voice coil framework is arranged corresponding to the magnetic circuit system of the sound generating device, the voice coil is fixedly arranged on the voice coil framework, at least part of the voice coil is positioned at the end part of the first end of the voice coil framework, so that the voice coil and the voice coil framework are at least partially overlapped in the inner and outer side directions of the voice coil framework, and the voice coil framework and the voice coil are matched with the magnetic gap.

In the technical scheme of the invention, at least part of the voice coil extends to the end part of the extending end and is arranged opposite to the end part of the extending end, so that in the length direction of the voice coil framework, at least part of the voice coil is overlapped with the extending end, the size occupied by the whole body of the voice coil and the voice coil framework in the inner and outer side directions of the voice coil framework can be reduced, correspondingly, the size of a magnetic gap for matching the voice coil and the voice coil framework can be reduced, and the sound generating device is ensured to have enough effective magnetic field intensity, thereby improving the performance of the sound generating device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an electronic product with a sound generating device;

FIG. 2 is a schematic view of a sound generating device prior to the improvement of the present invention;

FIG. 3 is a schematic view of a vibration system of the sound generator of FIG. 2;

FIG. 4 is a schematic view of an embodiment of a sound generating device provided by the present invention;

FIG. 5 is a schematic view of the vibration system of FIG. 4;

fig. 6 is a schematic view of another embodiment of the vibration system of fig. 4.

The embodiment of the invention is illustrated by reference numerals:

reference numerals	Name (R)	Reference numerals	Name (R)
				102	Sound producing device	2	Voice coil
103	Magnetic circuit system	21	Outer voice coil section
				103a	Magnetic gap	22	Inner voice coil section
104	Vibration system	3	Ball top
				1	Voice coil framework	31	First side surface
1a	Extension end	32	Second side surface
				1b	Mounting end

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an electronic product, in particular to an electronic product comprising a sound generating device, wherein the electronic product can be a mobile intelligent product, and particularly can be an intelligent wearable product such as an intelligent watch, an intelligent bracelet, an intelligent earphone and intelligent glasses. As shown in fig. 1, the electronic product is a smart phone, and the smart phone includes a sound generating device 100.

However, with the progress of society and the development of technology, the consumer has higher and higher requirements for electronic products, especially mobile intelligent electronic products, taking wearable devices such as smart watches, smart bracelets, smart earphones, smart glasses, etc., the development trend is more and more miniaturized and light and thin, and the sound generating device is an important component of the electronic products, which is inevitably required to be developed towards miniaturization and light and thin.

Fig. 2 and 3 show a sound generating device 101 of an electronic product before the improvement of the present invention, where the sound generating device 101 includes a vibration system 200 and a magnetic circuit system 300, where the vibration system 200 includes a voice coil bobbin 201 and a voice coil 202 disposed outside the voice coil bobbin 201, so as to avoid collision between the voice coil bobbin 201 and the voice coil 202 during vibration, it is necessary to widen a magnetic gap 301 of the magnetic circuit system 300 accordingly, specifically, as shown in fig. 3, L1 is the thickness of the voice coil bobbin 201, L2 is the thickness of the voice coil 202, L3 and L4 are correspondingly reserved evacuation gaps, and a width L of the magnetic gap 300 is L1 + L2 + L3 + L4, which may cause the magnetic gap 300 to affect an effective magnetic field strength too much, thereby reducing an electroacoustic performance of the sound generating device 101.

In view of the above, the present invention provides a sound generating device, and fig. 3 to 5 are illustrations of an embodiment of the sound generating device according to the present invention, which will be referred to as the present embodiment. Referring to fig. 3 to 5, in the present embodiment, the sound generating device 102 includes a magnetic circuit system 103 and a vibration system 104, wherein the magnetic circuit system 103 forms a magnetic gap 103a, the vibration system 104 includes a voice coil bobbin 1 and a voice coil 2, the voice coil bobbin 1 is configured to correspond to an extension end 1a1a of the magnetic circuit system 103 of the sound generating device 102, the voice coil 2 is fixedly mounted on the voice coil bobbin 1, the voice coil 2 at least partially extends to the extension end 1a of the voice coil bobbin 1, and is disposed opposite to an end of the extension end 1a, so that in a length direction of the voice coil bobbin 1 (in a direction of an arrow in fig. 5), the voice coil 2 at least partially overlaps the extension end 1a, and the voice coil bobbin 1 and the voice coil 2 are adapted to the magnetic gap 103 a.

In the technical scheme of the present invention, at least a portion of the voice coil 2 extends to the extension end 1a of the voice coil bobbin 1, and is disposed opposite to the end of the extension end 1a, so that in the length direction of the voice coil bobbin 1, at least a portion of the voice coil 2 is overlapped with the extension end 1a, so as to reduce the size of the whole of the voice coil 2 and the voice coil bobbin 1 occupied in the inner and outer side directions of the voice coil bobbin 1, and accordingly, the size of the magnetic gap 103a for the voice coil 2 and the voice coil bobbin 1 to adapt to can be reduced, thereby ensuring that the sound generating device 102 has sufficient effective magnetic field strength, and further improving the electroacoustic performance of the sound generating device 102.

Specifically, in this embodiment, the voice coil 2 includes an outer coil section 21 and an inner coil section 22, the outer coil section 21 is disposed opposite to an end of the extension end 1a, so that in the length direction of the voice coil bobbin 1, the outer coil section 21 is overlapped with the extension end 1a, the inner coil section 22 is disposed inside the outer coil section 21, in a direction close to the voice coil bobbin 1, the inner coil section 22 is disposed to protrude from the outer coil section 21, and a portion of the inner coil section 22 protruding from the outer coil section 21 is mounted inside the voice coil bobbin 1. That is, in the present embodiment, the voice coil 2 is provided in a stepped shape in the inner and outer directions, specifically, a stepped shape having a low outer side and a high inner side, so that the outer coil section 21 can be directly provided at the end of the first end of the voice coil bobbin 1 and fixed by the inner coil section 22. It should be apparent that the present design is not limited thereto, and in other embodiments, the voice coil 2 may be higher inside and lower inside and outside, and the inner coil section 22 is disposed at an end portion of the first end of the voice coil bobbin 1, and the outer coil section 21 is disposed outside the voice coil bobbin 1, or of course, the voice coil 2 may be disposed with a central portion being recessed, and the recessed portion being adapted to the first end of the voice coil bobbin 1.

Further, in the present embodiment, in the direction toward the outside of the voice coil bobbin 1, the outside of the voice coil bobbin 1 is located inside the outside coil section 21, so that, in the direction toward the inside and the outside of the voice coil bobbin 1, the voice coil bobbin 1 is completely located within the range of the voice coil 2 without occupying extra dimensions, specifically, as shown in fig. 4, at this time, the width of the magnetic gap 103a is L2 + L3 + L04, L2 is the thickness of the voice coil 2, L3 and L4 are correspondingly reserved as the escape gap 103a, and the size of the magnetic gap 301 provided in fig. 3 is L1 + L2 + L3 + L4, so that the thickness L1 of the voice coil bobbin 1 can be reduced by the magnetic gap 103a, and the size of the gap 103a can be greatly reduced, and the electroacoustic performance can be further improved.

In this embodiment, voice coil skeleton 1 still include with extend the installation end 1b that end 1a is relative, vibration system 104 still includes dome 3, dome 3 an organic whole connect in voice coil skeleton 1's installation end 1b, so voice coil skeleton 1 will the heat conduction that voice coil 2 produced in the work gives dome 3, dome 3 outwards gives the heat, and along with the outside of air current radiation to sound generating mechanism 102 and electronic product, has both reduced the temperature of sound generating mechanism 102 itself, can not conduct the inside of electronic product to the heat that sound generating mechanism 102 produced again, can not influence other chips of electronic product and normally work, has avoided user experience to descend or even produce the potential safety hazard simultaneously.

The manner of connecting the dome 3 and the mounting end 1b of the voice coil bobbin 1 into a whole is not limited, and the dome and the mounting end may be integrally formed, or the dome and the mounting end may be connected by an integral connection manner, such as welding. Specifically, in the present embodiment, the dome 3 is integrally formed with the voice coil bobbin 1.

Moreover, in order to enable the dome 3 and the voice coil bobbin 1 to better conduct heat of the voice coil 2, preferably, the dome 3 and the voice coil bobbin 1 are made of metal, obviously, the dome 3 and the voice coil bobbin 1 may be made of the same material or different materials, and the same metal may be integrally formed or welded, while the different metal may be welded.

Generally, the dome 3 and the voice coil bobbin 1 are made of a metal material having a light weight and a certain strength, for example, the dome 3 and the voice coil bobbin 1 may be, but not limited to, aluminum or an aluminum magnesium alloy.

Fig. 6 is a further embodiment of the vibration system provided by the present invention, in this embodiment, the globe top 3 has a first side surface 31 facing the voice coil bobbin 1 and a second side surface 32 facing away from the voice coil bobbin 1, the first side surface 31 and/or the second side surface 32 of the globe top 3 are/is disposed in a concave/convex manner, specifically, the globe top 3 has a first side surface 31 facing the voice coil bobbin 1 and a second side surface 32 facing away from the voice coil bobbin 1, and the first side surface 31 and the second side surface 32 of the globe top 3 are disposed in a concave/convex manner, so that the total surface area of the globe top 3 can be increased, the heat dissipation effect can be improved, the rigidity of the globe top 3 can be increased, and the high-frequency bandwidth of the sound generating device 102 can be expanded.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A vibration system for use in a sound generating device, the vibration system comprising

2. The vibration system of claim 1, wherein the voice coil comprises:

3. The vibration system of claim 2 wherein the outer side of the voice coil former is located within the outer voice coil section in a direction outward of the voice coil former.

4. The vibration system of claim 1 wherein the voice coil former further comprises a mounting end opposite the extended end, the vibration system further comprising a dome integrally connected to the mounting end of the voice coil former.

5. The vibration system of claim 4 wherein said dome is integrally formed with said voice coil former.

6. The vibration system of claim 5 wherein said dome and said voice coil former are made of metal.

7. The vibration system of claim 6 wherein said dome and said voice coil former are aluminum or aluminum magnesium alloy.

8. The vibration system of claim 4, wherein the dome has a first side facing the voice coil former and a second side facing away from the voice coil former, and the first side and/or the second side of the dome is concave-convex.

9. A sound generating device, comprising:

the vibration system of any of claims 1 to 8, the voice coil former and the voice coil being adapted to the magnetic gap.

10. An electronic product comprising the sound emitting device according to claim 9.