CN107682788B

CN107682788B - Sound production device

Info

Publication number: CN107682788B
Application number: CN201710771824.2A
Authority: CN
Inventors: 刘岩涛; 郭翔; 朱婷; 刘华伟
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2020-02-21
Anticipated expiration: 2037-08-31
Also published as: CN107682788A

Abstract

The invention discloses a sound production device. This sound generating mechanism includes the casing, vibration system and magnetic circuit have been acceptd in the casing, vibration system is including combining voice coil loudspeaker voice coil and vibrating diaphragm together, magnetic circuit including assemble in yoke on the casing, the casing is including fashioned main part respectively and the portion of giving vent to anger, the portion of giving vent to anger is located the lateral part of yoke, the portion of giving vent to anger with main part, yoke location assembly form together and are located the seal chamber of vibrating diaphragm rear side be equipped with the venthole in the portion of giving vent to anger. The invention aims to solve the problem that when the air outlet hole is integrally formed on the shell, the structure of the shell is complex, so that the mold is difficult to realize.

Description

Sound production device

Technical Field

The invention belongs to the technical field of electroacoustic, and particularly relates to a sound production device.

Background

The loudspeaker unit comprises a supporting structure, a vibration system and a magnetic circuit system. The support structure includes a housing and a front cover. The shell and the front cover enclose a cavity, and the magnetic circuit system and the vibration system are accommodated in the cavity enclosed by the shell and the front cover. The vibration system includes a diaphragm and a voice coil coupled together. The magnetic circuit system is formed with a magnetic gap, and the voice coil is located in the magnetic gap.

The loudspeaker module comprises a module shell and a loudspeaker single body accommodated in the module shell. The speaker monomer divides the inner cavity enclosed by the module shell into a front sound cavity and a rear sound cavity. Be provided with the venthole on speaker monomer casing, one side of vibrating diaphragm is passed through the venthole and is communicate with the back sound chamber to guarantee the balance of preceding sound chamber and back sound chamber atmospheric pressure, avoid the vibration that the atmospheric pressure difference influences the vibrating diaphragm.

At present, the shell of the loudspeaker is of an integral structure formed by integral injection molding, and the air outlet is directly formed on the single shell. Because still need integrated into one piece venthole on the casing, the structure of casing is comparatively complicated, leads to the mould to realize more difficultly, must adopt the slider structure sometimes. And, the position of the air outlet hole integrated with the shell through injection molding is difficult to accurately position, and in addition, the plastic shell has low strength and is easy to deform, so that the air outlet hole is easy to block, and the reliability of the product is reduced. The venthole structure integrated into one piece is on the casing, when assembling the free each part of speaker, because the relevant structure of venthole blocks, can only assemble from the front cover face of monomer casing, complex operation, complicacy.

Therefore, there is a need for an improved sound generating device.

Disclosure of Invention

One object of the present invention is to provide a new solution for a sound generating device.

According to a first aspect of the present invention, a sound emitting device is provided. This sound generating mechanism includes the casing, vibration system and magnetic circuit have been acceptd in the casing, vibration system is including combining voice coil loudspeaker voice coil and vibrating diaphragm together, magnetic circuit including assemble in yoke on the casing, the casing is including fashioned main part respectively and the portion of giving vent to anger, the portion of giving vent to anger is located the lateral part of yoke, the portion of giving vent to anger with main part, yoke location assembly form together and are located the seal chamber of vibrating diaphragm rear side be equipped with the venthole in the portion of giving vent to anger.

Optionally, a central magnet is disposed at a central portion of the magnetic yoke, first side walls are disposed on two opposite first side portions of the magnetic yoke, a magnetic gap is formed between the first side walls and the central magnet, the voice coil extends into the magnetic gap, the air outlet portion is assembled on the outer side of the first side walls, and an air outlet channel communicated with the air outlet hole is formed between the first side walls and the main body portion and the air outlet portion.

Optionally, edge magnets are mounted on the other two second side portions of the magnetic yoke, and a magnetic gap for accommodating a voice coil is formed between each edge magnet and the central magnet; or two second side walls are arranged on the other two second side parts of the magnetic yoke, and a magnetic gap is formed between each second side wall and the central magnet.

Optionally, the diaphragm is coupled to an upper end of the housing, a wire outlet groove is disposed at a lower end of the housing, and the lead is arranged along the outer side of the first sidewall and led out from the wire outlet groove.

Optionally, a metal piece is injection molded in the air outlet.

Optionally, the metal piece is configured to be connected with a positioning structure for positioning an injection molding position of the metal piece on the outer side of the metal piece when the metal piece is injected into the air outlet part as an insert; the positioning structure is configured to position an assembly position of the gas outlet portion when the gas outlet portion is assembled with the main body portion.

Optionally, the air outlet part is assembled with the main body part through a concave-convex structure in a clamping mode, and the magnetic yoke is assembled with the air outlet part and the main body part through a concave-convex structure in a clamping mode.

Optionally, the air outlet part is bonded with the main body part; or the air outlet part and the main body part are fixed together in a hot melting mode.

Optionally, the air outlet portion is configured to jointly enclose the air outlet hole after being positioned and assembled with the main body portion; or the air outlet is a through hole arranged on the air outlet part.

Optionally, the air outlet holes are covered with a mesh cloth.

The inventor of the invention finds that the shell of the existing sound generating device is an integral structure formed by integral injection molding, and the air outlet is directly formed on the shell. Because still need integrated into one piece venthole on the casing, the structure of casing is comparatively complicated, leads to the mould to realize more difficultly. The position of the air outlet hole integrally injection-molded with the shell is difficult to accurately position, and the plastic shell is low in strength and easy to deform, so that the air outlet hole is easy to block, and the reliability of a product is reduced. The venthole structure integrated into one piece is on the casing, when assembling each part of sound generating mechanism, because the relevant structure of venthole blocks, can only assemble from the front cover face of casing, complex operation, complicacy. Therefore, the technical task to be achieved or the technical problems to be solved by the present invention are never thought or anticipated by those skilled in the art, and therefore the present invention is a new technical solution.

In the sound production device provided by the invention, the shell comprises the main body part and the air outlet part which are respectively formed. The air outlet part is independently formed, and the air outlet part and the main body part are assembled together in the process of assembling all parts of the sound generating device. After the air outlet part and the main body part are assembled together, an air outlet hole communicated with one side of the vibrating diaphragm of the sound production device is formed.

The air outlet part is formed independently, the design space of the air outlet structure is large, and the realization of the die is facilitated. The position of the structure of giving vent to anger sets up accurately, and the portion of giving vent to anger is in the same place the back with the main part location assembly, thereby the venthole of formation is difficult for blockking up the reduction that leads to the product reliability.

The air outlet part is independently formed, and the strength of the air outlet part can be improved by adopting processes such as metal inserts and the like. After the air outlet part and the main body part are assembled together, the air outlet hole can be accurately formed. The air outlet hole can not be blocked due to the deformation of the material.

The air outlet part may be relatively assembled with the main body part during the assembly process. Because the air outlet part is not blocked, the process manufacturing such as wire guiding and the like from the back side of the product is facilitated, and the application of the product is expanded.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural view of a sound generating device provided in an embodiment of the present invention;

FIG. 2 is an exploded view of a sound generating device provided in one embodiment of the present invention;

fig. 3 is a schematic structural view of a yoke provided in an embodiment of the present invention;

wherein, 10: a main body portion; 100: an outlet groove; 11: an air outlet part; 12: a metal member; 120: a positioning structure; 13: an air outlet; 2: screen cloth; 3: a magnetic yoke; 30: a bottom wall; 31: a first side wall.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The invention provides a sound generating device, and referring to fig. 1, the sound generating device comprises a shell, and a magnetic circuit system and a vibration system which are contained in the shell. The vibration system includes a voice coil and a diaphragm coupled together.

The magnetic circuit system comprises a yoke 3 fitted to the housing. The housing includes a body portion 10 and an air outlet portion 11 which are respectively formed. The air outlet 11 is located at a side portion of the yoke 3. The air outlet 11 is positioned and assembled with the body 10 and the yoke 3, and forms a sealed cavity at the back side of the diaphragm. The air outlet part 11 is provided with an air outlet hole 13. And the sealing cavity at the rear side of the vibrating diaphragm is communicated with the air outlet hole 13. Since the air outlet part 11 is located at the side part of the magnetic yoke 3, the air outlet hole 13 can realize the lateral air outlet of the sound generating device. When the vibrating diaphragm vibrates, the air pressure of the front side and the air pressure of the rear side of the vibrating diaphragm can be kept consistent, and the influence of air pressure difference on the vibration of the vibrating diaphragm is avoided.

The portion of giving vent to anger 11 independent shaping, the design space of the portion of giving vent to anger 11 is big, does benefit to the mould and realizes. The structure, size, position, etc. of the air outlet portion 11 can be accurately set. After the air outlet part 11 and the main body part 10 are positioned and assembled together, the formed air outlet hole 13 is accurate in position and not easy to block, and the reliability of the product is improved.

In one example, referring to fig. 1 and 2, the air outlet holes 13 may be covered with a mesh cloth 2.

In this embodiment, in order to prevent impurities such as dust from entering the interior of the sound generating device through the air outlet 13, the mesh 2 may be a dust screen.

In this embodiment, to obtain better acoustic performance, the mesh 2 may also be a damping mesh.

The magnetic circuit system is provided with a magnetic gap, and the voice coil extends into the magnetic gap. Specifically, referring to fig. 2 and 3, the central portion of the yoke 3 is provided with a central magnet. The magnetic yoke 3 can be a basin stand structure. The opposing first sides of the yoke 3 are each provided with a first side wall 31. The first side wall 31 and the central magnet form a magnetic gap therebetween. The voice coil extends into the magnetic gap between the first side wall 31 and the central magnet. The air outlet portion 11 is mounted to an outer side of the first sidewall 31. An air outlet channel communicated with the air outlet hole 13 is formed between the first side wall 31 and the main body part 10 and between the first side wall and the air outlet part 11.

Further, referring to fig. 3, the yoke 3 has a rectangular shape, and the yoke 3 includes a rectangular bottom wall 30. The number of the first side walls 31 is two, and the two first side walls 31 respectively protrude outwards from two opposite straight edges of the bottom wall 30. The number of the air outlet parts 11 is two, and the two air outlet parts 11 are respectively positioned at the outer sides of the two first side walls 31.

The specific structure of the other two second side portions of the yoke 3 may be various.

Optionally, edge magnets are mounted on two other second edge portions of the yoke 3. And a magnetic gap for accommodating the voice coil is formed between the side magnets and the central magnet.

Optionally, two second side walls are provided on each of the other two second side portions of the yoke 3. A magnetic gap is formed between the second side wall and the central magnet.

To facilitate wire-down, further, referring to fig. 2, the diaphragm is coupled to one end of the housing. The end of the housing combined with the diaphragm is defined as an upper end, and the other end of the housing opposite to the upper end is defined as a lower end. The diaphragm is combined with the upper end of the shell. An outlet groove 100 is provided at the lower end of the housing. The lead of the voice coil is routed outside the first side wall 31 and is led out from the outlet groove 100. This structure, because the lower extreme of casing is located to the outlet groove, compare in the condition that the casing upper end was located to the outlet groove, can realize better water-proof effects.

In one embodiment, first, the yoke 3 is assembled with the body portion 10, and the diaphragm coupled with the voice coil is coupled to the upper end of the body portion 10. The lead wire of the voice coil is arranged on the outer side of the first side wall 31 in a straight line and led out from the wire outlet groove 100. Then, the air outlet part 11 is mounted with the main body part 10.

Of course, the first side wall 31 may not be provided at the first edge of the yoke 3. For example, the air outlet 11 may be located outside the side magnet. For example, the number of the air outlet portions 11 may be four or other numbers.

The air outlet hole 13 may be formed in various ways.

In one example, referring to fig. 1, after the gas outlet portion 11 and the main body portion 10 are positioned and assembled together, the gas outlet portion 11 and the main body portion 10 together enclose the gas outlet hole 13.

In this embodiment, one or more air outlet grooves may be formed on the air outlet portion 11. After the main body 10 and the outlet portion 11 are assembled together, the main body 10 can seal one side opening of the outlet groove to form the outlet hole 13.

In another example, the air outlet 13 may be a through hole disposed on the air outlet 11. After the main body 10 and the air outlet 11 are assembled together, the through hole is the air outlet 13.

The way of assembling the air outlet part 11 with the main body part 10 may be various.

In one example, the air outlet portion 11 is bonded to the main body portion 10. For example, the air outlet 11 and the main body 10 may be bonded together by a glue coating process.

In another example, the air outlet 11 and the main body 10 may be fixed together by heat fusion.

The air outlet part 11 is independently formed, and the strength of the air outlet part can be improved by adopting processes such as metal inserts and the like.

Preferably, referring to fig. 2, a metal member 12 is injection-molded in the gas outlet 11. The metal member 12 can improve the strength of the gas outlet 11. For example, a steel sheet or the like may be injection-molded in the gas outlet portion 11. Thus, the strength of the air outlet part 11 is high, and the air outlet part is not easy to deform. The outlet hole 13 can be accurately formed after the outlet portion 11 is assembled with the main body portion 10. Moreover, the air outlet 13 is not blocked due to material deformation.

Since the air outlet 11 is small, the injection position of the metal member 12 needs to be accurately positioned. Further, referring to fig. 2, when the metal piece 12 is injection-molded in the air outlet 11, a positioning structure 120 for positioning an injection-molding position of the metal piece 12 is connected to an outer side of the metal piece 12. For example, the positioning structure 120 may be a positioning post or a positioning hole.

In one embodiment, referring to fig. 2, two positioning holes with different radii may be disposed on the positioning structure 120. The air outlet part 11 is formed by injection molding through an injection molding machine. And the injection molding machine can be provided with a positioning column matched with the positioning hole. And the injection molding position of the metal piece 12 is accurately positioned through the matching of the positioning hole and the positioning column.

The positioning structure 120 may also be used to position the mounting position of the gas outlet part 11 in the process of mounting the gas outlet part 11 on the main body part 10 later.

In a specific assembling process, the main body 10 may be placed on a carrying platform so as to assemble the air outlet 11 on the main body 10. And the bearing platform is provided with a positioning column matched with the positioning hole in shape. Through the matching between the positioning post on the bearing platform and the positioning hole on the positioning structure 120, the position where the air outlet portion 11 is assembled on the main body portion 10 can be accurately positioned.

It should be noted that the outer side of the metal piece 12 may be connected to the positioning structure 120 through a spring sheet, so that the spring sheet is broken off after the injection molding or the assembly is completed.

The air outlet part 11 can be positioned in other ways.

In one example, the air outlet 11 and the main body 10 are assembled by a concave-convex structure.

In this embodiment, referring to fig. 1 and fig. 2, a convex structure may be disposed on the main body 10, and a matching concave structure may be disposed on the air outlet 11. The air outlet part 11 is positioned at the position of the main body part 10 by matching and clamping the convex structure and the concave structure.

The yoke 3 and the main body 10 may be assembled by a concave-convex structure. The magnet yoke 3 and the air outlet part 11 can also be assembled together through a concave-convex structure in a clamping way.

It should be noted that, when the sound generating device is installed in the module housing, the sound generating device divides the inner cavity of the module housing into a front sound cavity and a rear sound cavity. The seal cavity body at the rear side of the vibrating diaphragm is communicated with the rear sound cavity through the air outlet hole 13, so that the balance of the air pressure of the front sound cavity and the air pressure of the rear sound cavity is ensured, and the influence of the air pressure difference on the vibration of the vibrating diaphragm is avoided.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A sound generating device comprises a shell, wherein a vibration system and a magnetic circuit system are accommodated in the shell, the vibration system comprises a voice coil and a vibrating diaphragm which are combined together, the magnetic circuit system comprises a magnetic yoke (3) assembled on the shell, and the sound generating device is characterized in that the shell comprises a main body part (10) and an air outlet part (11) which are respectively formed, the air outlet part (11) is positioned on the side part of the magnetic yoke (3), the air outlet part (11), the main body part (10) and the magnetic yoke (3) are positioned and assembled together to form a sealed cavity positioned on the rear side of the vibrating diaphragm, and an air outlet hole (13) is formed in the air outlet part (11);

the central part of yoke (3) is equipped with central magnet, two relative first edges of yoke (3) all are equipped with first lateral wall (31), first lateral wall (31) with constitute the magnetic gap between the central magnet, the voice coil loudspeaker voice coil stretches into in the magnetic gap, portion of giving vent to anger (11) assemble in the outside of first lateral wall (31), first lateral wall (31) with form between main part (10) and the portion of giving vent to anger (11) with the air outlet channel of venthole 13 intercommunication.

2. The sound generating device according to claim 1, wherein the other two second sides of the yoke (3) are each provided with a side magnet, and a magnetic gap for accommodating a voice coil is formed between the side magnets and the center magnet; alternatively, the first and second electrodes may be,

two second side walls are arranged on the other two second side parts of the magnetic yoke (3), and magnetic gaps are formed between the second side walls and the central magnet.

3. The sound generating apparatus according to claim 1, wherein the diaphragm is coupled to an upper end of the housing, an outlet groove (100) is formed at a lower end of the housing, and a lead of the voice coil is routed outside the first sidewall (31) and led out from the outlet groove (100).

4. A sound-generating device as claimed in claim 1, characterised in that a metal piece (12) is injection moulded in the outlet (11).

5. The sound generating device according to claim 4, wherein the metal member (12) is configured such that when being injection molded as an insert in the air outlet portion (11), a positioning structure (120) for positioning an injection molding position of the metal member (12) is connected to an outer side of the metal member (12);

the positioning structure (120) is configured to position the fitting position of the gas outlet portion (11) when the gas outlet portion (11) is assembled with the main body portion (10).

6. The sounding device according to claim 1, characterized in that the air outlet part (11) is assembled with the main body part (10) through a concave-convex structure in a clamping manner, and the magnetic yoke (3) is assembled with the air outlet part (11) and the main body part (10) through a concave-convex structure in a clamping manner.

7. The sound generating apparatus according to claim 1, wherein said air outlet portion (11) is bonded to said main body portion (10); alternatively, the first and second electrodes may be,

the air outlet part (11) and the main body part (10) are fixed together in a hot melting mode.

8. The sound generating apparatus according to claim 1, wherein said air outlet portion (11) is configured to jointly enclose said air outlet hole (13) after being positioned and assembled with said main body portion (10); alternatively, the first and second electrodes may be,

the air outlet (13) is a through hole arranged on the air outlet part (11).

9. The sound-generating device according to claim 1, characterized in that the air outlet holes (13) are covered with a mesh (2).