CN105681977B

CN105681977B - Loudspeaker

Info

Publication number: CN105681977B
Application number: CN201610201984.9A
Authority: CN
Inventors: 刘华伟; 崔现丽
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2019-08-02
Anticipated expiration: 2036-03-31
Also published as: CN105681977A

Abstract

The present invention provides a kind of loudspeaker, the magnetic circuit system including shell and receiving inside the shell；Wherein, magnetic circuit system include conductive magnetic yoke, the centring magnet for being fixed on conductive magnetic yoke center, around centring magnet setting while magnet, with centring magnet and while magnet the center washer and Bian Huasi that are correspondingly arranged；Wherein, it is provided with flanging in the short transverse of the side of side washer, limiting slot is provided in the horizontal direction of side, flanging and limiting slot are molded to shell；Limiting slot go deep into the maximum cross-section width inside washer greater than limiting slot while washer side edge surface width.Utilize foregoing invention, it can be ensured that the firm connection between washer and shell enhances the intensity and reliability of shell.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of acoustics, in particular to a loudspeaker.

Background

A speaker plays an indispensable role in a sound reproduction system as a common electroacoustic transducer device for converting electric energy into acoustic energy. The loudspeaker is the weakest component in the sound reproduction system, and is the most important component for the sound reproduction effect. The loudspeaker has various types, and audio electric energy enables a cone or a diaphragm to vibrate and generate resonance with surrounding air to make sound through electromagnetic, piezoelectric or electrostatic effects. Therefore, people can hear wonderful sound just with the appearance of the loudspeaker and the receiver.

At present, in order to meet the requirements of performance and reliability, a washer of a vibration system is usually fixed in a shell in an injection molding mode, and the problem that the washer and a plastic shell are peeled off exists in the use process of the shell of the injection molded washer, so that the normal use and the product percent of pass of a product are influenced.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a speaker, so as to solve the problem that the washer of the conventional speaker is easy to fall off from the housing, which affects the product performance and quality.

According to the present invention, there is provided a speaker comprising a housing and a magnetic circuit system housed in the housing; the magnetic circuit system comprises a magnetic conducting yoke, a central magnet fixed at the central position of the magnetic conducting yoke, a side magnet arranged around the central magnet, and a central washer and a side washer which are arranged corresponding to the central magnet and the side magnet; wherein, the side edge of the side washer is provided with a blank holder in the height direction, the horizontal direction of the side edge is provided with a limit groove, and the blank holder and the limit groove are both injected into the shell; the maximum cross-sectional width of the limiting groove penetrating into the side washer is larger than the width of the limiting groove on the side surface of the side washer.

In addition, the preferred scheme is that the limiting groove is a dovetail groove, a trapezoid groove or an arc-shaped groove, wherein the radian of the arc-shaped groove is greater than pi; wherein, the spacing groove sets up on the pressure edge and extends to the inside of limit china department.

In addition, it is preferable that the length of the edge pressing is not greater than the length of the side edge of the corresponding edge washer.

In addition, the preferred scheme is that at least one limiting groove is respectively arranged on each side edge of the side washer.

In addition, the preferable scheme is that the side washer is of a rectangular annular structure, and the side magnet is of a strip structure; the four side magnets are respectively arranged corresponding to the four side edges of the edge washer.

In addition, the vibration generator preferably further comprises a vibration system accommodated in the housing; the vibration system comprises a vibrating diaphragm and a voice coil fixed on one side of the vibrating diaphragm; the voice coil includes a voice coil body and a voice coil lead wire wound on the voice coil body.

In addition, the preferred scheme is that a magnetic gap is formed between the side washer and the side magnet and between the center washer and the center magnet, and the voice coil is suspended in the magnetic gap.

In addition, the preferable proposal is that the loudspeaker also comprises a spring plate which is injected on the shell and is used for connecting the internal and external circuits of the loudspeaker; the elastic sheet is conducted with the voice coil lead.

In addition, the preferable scheme is that an avoiding chamfer angle for avoiding the elastic sheet is arranged on the edge washer.

In addition, it is preferable that the diaphragm includes a fixing portion fixedly connected to the housing, a folded ring portion of a concave/convex structure integrally provided with the fixing portion, and a reinforcing portion located in the folded ring portion.

By utilizing the loudspeaker, the side wall of the washer is provided with the edge pressing and limiting groove structure, and the edge pressing and limiting groove structure is injected into the shell, so that the firm connection between the washer and the shell is ensured, and the washer is prevented from falling off from the shell in the using process of a product; in addition, the strength of the shell can be enhanced, the reject ratio of products is reduced, and the stable and reliable performance of the products is ensured.

To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is an exploded view of a speaker according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a speaker according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a bezel washer according to an embodiment of the present invention;

FIG. 4 is a schematic view of an assembled structure of a bezel and a housing according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a portion a-a in fig. 4.

Wherein the reference numerals include: the loudspeaker comprises a reinforcing part 1, a vibrating diaphragm 2, a central washer 3, a central magnet 4, a voice coil 5, a side washer 6, a pressing edge 61, an avoiding chamfer 62, an avoiding groove 63, a limiting groove 64, a shell 7, a side magnet 8 and a magnetic yoke 9.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

To describe the speaker structure of the present invention in detail, specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 shows an exploded structure of a speaker according to an embodiment of the present invention; FIG. 2 shows a cross-sectional structure of a speaker according to an embodiment of the present invention

As shown in fig. 1 and 2 together, the speaker of the embodiment of the present invention includes a housing 7 and a magnetic circuit system housed in the housing 7; the magnetic circuit system comprises a magnetic yoke 9, a central magnet 4 fixed at the central position of the magnetic yoke 9, a side magnet 8 arranged around the central magnet 4, and a central washer 3 and a side washer 6 which are respectively arranged corresponding to the central magnet 4 and the side magnet 8; the side washer 6 is characterized in that a blank holder 61 is arranged in the height direction of each side edge of the side washer 6, a limiting groove is arranged in the horizontal direction of each side edge, and the blank holder 61 and the limiting groove are both embedded into the side wall of the shell 7 when the side washer 6 and the shell 7 are fixed in an injection molding mode; moreover, in order to ensure the firm connection between the edge washer 6 and the shell 7 and prevent the edge washer 6 from falling off from the shell 7, the limiting groove is arranged as follows: the maximum cross-sectional width of the limiting groove penetrating into the side washer 6 is larger than the width of the limiting groove on the side surface of the side washer 6.

Specifically, the loudspeaker in the embodiment of the invention comprises a shell 7, and a vibration system and a magnetic circuit system which are accommodated in a cavity formed by the shell 7; the vibration system comprises a diaphragm 2, a voice coil 5 fixed on one side of the diaphragm 2, and a reinforcement part 1 located at the center of the diaphragm 2. Voice coil loudspeaker voice coil 5 includes voice coil loudspeaker voice coil main part and the voice coil loudspeaker voice coil lead wire of winding in the voice coil loudspeaker voice coil main part outside, and the both ends of voice coil loudspeaker voice coil lead wire are drawn forth from the voice coil loudspeaker voice coil main part respectively to switch on with the shell fragment of two connection loudspeaker external circuit of speaker respectively, through the cooperation of shell fragment and customer end product, realize switching on of loudspeaker external circuit.

Wherein, vibrating diaphragm 2 includes the fixed part (being located the most peripheral of vibrating diaphragm) with shell 7 fixed connection, the book ring portion of the concave/convex structure that sets up with fixed part an organic whole and set up at the inside plane portion (being located the most inside of vibrating diaphragm) of book ring portion, reinforcement portion 1 sets up the plane portion at vibrating diaphragm 2, mainly used adjusts the acoustic performance of speaker, for reducing vibration system's overall quality, usually set up at the position that 2 plane portions of vibrating diaphragm correspond reinforcement portion 1 and remove the material, reinforcement portion 1 then covers and should get the material position.

In addition, the magnetic circuit system comprises a magnetic conduction yoke 9 for fixing the magnet and correcting magnetic lines of force, a central magnet 4 which is stuck and fixed at the central position of the magnetic conduction yoke 9 and four side magnets 8 which are arranged around the central magnet 4, wherein a central washer 3 is stuck on one side of the central magnet 4 far away from the magnetic conduction yoke 9, and a side washer 6 is arranged on the same side of the side magnets 8 far away from the magnetic conduction yoke 9; wherein, center magnet 4 and center china department 3 form a body structure, limit magnet 8 and limit china department 6 also form a body structure, the hole that exists between the body structure that center magnet 4 and center china department 3 formed and the body structure that limit magnet 8 and limit china department 6 formed is the magnetic gap promptly, voice coil loudspeaker voice coil 5 hangs and establishes in this magnetic gap, when voice coil loudspeaker voice coil 5 in magnetic field has audio current to flow through, can receive an alternating propulsion to produce alternating motion, thereby drive the vibrating diaphragm vibrations, and then promote the air repeatedly and the sound production.

It should be noted that, four side walls of the housing 7 are respectively provided with a notch for avoiding the edge magnet 8, each edge magnet 8 is accommodated in the corresponding notch, the edge washer 6 tightly attached to the edge magnet 8 is fixedly connected with the housing 7, each side edge of the edge washer 6 is respectively provided with an edge pressing 61 and a limiting groove 64, the edge pressing 61 and the limiting groove 64 are injected into the side wall of the housing 7, and therefore the edge washer 61 is limited in the X-axis direction, the Y-axis direction and the Z-axis direction of the speaker.

FIG. 3 illustrates a curb washer structure according to an embodiment of the invention; fig. 4 shows an assembly structure of the washer and the housing and a cross-sectional structure along a-a according to an embodiment of the present invention.

As shown together with fig. 1 to 4, the washer 6 of the embodiment of the present invention is an annular structure, and the rim magnet 8 is a strip-shaped structure; the four side magnets 8 are arranged in four, and the four side magnets 8 are respectively arranged corresponding to the four side edges of the washer 6. The four sides of the edge washer 6 are respectively provided with an edge pressing 61 and a limiting groove 64; wherein, blank holder 61 is the structure of pushing down that sets up along speaker Z axle direction, and blank holder 61's length is not more than the length of the side china department 6 that corresponds, and when the side china department 6 was moulded plastics with shell 7, the raw materials of moulding plastics of shell 7 of moulding plastics can be full of blank holder 61, and the opposite side china department 6 is spacing in the direction of height (or Z axle direction) of speaker, avoids the side china department 6 to appear separating or flash joint in the direction of height of shell 7.

In addition, the limiting groove 64 is arranged on the edge pressing 61 and extends into the edge washer 6, and the width of the limiting groove 64 at the maximum section penetrating into the edge washer 6 is larger than that of the limiting groove 64 on the side surface of the edge washer 6; for example, the limiting groove 64 may be configured as a dovetail groove structure (shown in fig. 3 and 4), a trapezoid structure, or an arc-shaped groove structure, so that the injection molding material of the injection molding housing 7 can enter the limiting groove 64 to prevent the injection molding material from escaping. When the side washer 6 and the shell 7 are molded in an injection mode, the injection molding raw material can be filled with the limiting groove 64, so that the side washer 6 is limited in the horizontal direction (or the X-axis direction and the Y-axis direction) of the loudspeaker, and the side washer 6 is prevented from being separated or flash-seamed in the horizontal direction of the shell 7. When the limit groove 64 is set to be an arc-shaped groove, the arc of the arc-shaped groove located at the side washer needs to be larger than pi or the angle of the opening of the arc-shaped groove is smaller than 180 degrees, so that the injection molding raw material embedded into the limit groove and injected together with the shell 7 can be prevented from falling off from the side washer.

In one embodiment of the invention, an avoiding chamfer 62 for avoiding the loudspeaker elastic sheet is further arranged at the corresponding corner position of two corresponding short shaft sides of the edge washer 6, and the position of the avoiding chamfer 62 is matched with the arrangement position of the elastic sheet. An arc-shaped avoiding groove 63 is also arranged on the inner side of the edge washer, and the avoiding groove 63 is mainly used for avoiding the bent voice coil lead; that is, the voice coil lead is led out from the inside of the speaker and then conducted with the elastic sheet, and the avoiding groove 63 is mainly used for avoiding leading out of the voice coil lead.

It should be noted that the length of the edge 61 arranged on each side of the edge washer is not greater than the length of the corresponding side of the edge washer, and at least one limiting groove 64 is respectively arranged on each side of the edge washer, and the number of the limiting grooves can be adjusted according to the length of the washer, the product size or the production requirement. In addition, the edge pressing and limiting groove structure is not limited to the design of a washer, and when the sheet-shaped structure component and a shell or other equipment are required to be fixed in an injection molding mode, the edge pressing or limiting groove can be arranged at the edge of the sheet-shaped structure component to strengthen the connection strength between the edge pressing and limiting groove and the shell or other equipment; for example, when the magnet or the yoke is fixed to the housing by injection molding, a flange or a stopper groove is provided on a side of the magnet or the yoke.

According to the loudspeaker provided by the embodiment of the invention, the side edges of the washer are provided with the edge pressing along the vertical direction and the limiting groove along the horizontal direction, when the washer and the shell are fixed in an injection molding manner, the edge pressing and the limiting groove can be filled with the injection molding raw material of the shell, so that the washer can be effectively limited in the height and horizontal direction of the shell, and the washer is prevented from being separated from the shell or generating flash seams; not only can ensure the firm combination between the washer and the shell, but also can enhance the strength and the reliability of the shell, reduce the fraction defective of products and ensure the long-term stable and reliable performance of the products.

A loudspeaker according to the invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the loudspeaker of the present invention described above without departing from the spirit of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.

Claims

1. A loudspeaker comprises a housing and a magnetic circuit system accommodated in the housing; the magnetic circuit system comprises a magnetic conducting yoke, a central magnet fixed at the central position of the magnetic conducting yoke, a side magnet arranged around the central magnet, and a central washer and a side washer which are arranged corresponding to the central magnet and the side magnet; it is characterized in that the preparation method is characterized in that,

arranging a blank holder in the height direction of the side edge of the side washer, arranging at least one limiting groove in the horizontal direction of the side edge, and injecting the blank holder and the limiting groove into the shell, wherein the blank holder and the limiting groove are filled with injection molding raw materials of the shell; wherein,

the limiting groove is arranged on the pressing edge and extends into the edge washer;

the maximum cross-sectional width of the limiting groove penetrating into the edge washer is larger than the width of the limiting groove on the side surface of the edge washer.

2. The loudspeaker of claim 1,

the limiting groove is a dovetail groove, a trapezoid groove or an arc-shaped groove, wherein the radian of the arc-shaped groove is larger than pi.

3. The loudspeaker of claim 1,

the length of the edge pressing is not more than that of the side edge of the corresponding edge washer.

4. The loudspeaker of claim 1,

and at least one limiting groove is respectively arranged on each side edge of the side washer.

5. The loudspeaker of claim 1,

the edge washer is of a rectangular annular structure, and the edge magnet is of a strip structure; wherein,

the four side magnets are arranged corresponding to the four side edges of the side washer respectively.

6. The loudspeaker of claim 1, further comprising a vibration system housed within the enclosure; wherein,

the vibration system comprises a vibrating diaphragm and a voice coil fixed on one side of the vibrating diaphragm;

the voice coil includes a voice coil body and a voice coil lead wire wound on the voice coil body.

7. The loudspeaker of claim 6,

and a magnetic gap is formed between the side washer and the side magnet and between the center washer and the center magnet, and the voice coil is suspended in the magnetic gap.

8. The loudspeaker of claim 7,

the loudspeaker also comprises an elastic sheet which is injected on the shell and is used for connecting an internal circuit and an external circuit of the loudspeaker;

the elastic sheet is communicated with the voice coil lead.

9. The loudspeaker of claim 8,

and an avoidance chamfer for avoiding the elastic sheet is arranged on the edge washer.

10. The loudspeaker of claim 6,

the vibrating diaphragm comprises a fixed part fixedly connected with the shell, a folded ring part of a concave/convex structure integrally arranged with the fixed part, and a reinforcing part positioned in the folded ring part.