WO2019015070A1

WO2019015070A1 - Loudspeaker

Info

Publication number: WO2019015070A1
Application number: PCT/CN2017/102284
Authority: WO
Inventors: 王建建; 刘迎新
Original assignee: 歌尔股份有限公司
Priority date: 2017-07-18
Filing date: 2017-09-19
Publication date: 2019-01-24
Also published as: CN207070344U

Abstract

Disclosed is a loudspeaker, comprising a housing, and a vibration system and a magnetic circuit system received in the housing. The vibration system comprises a vibration diaphragm and a voice coil connected and fixed to the vibration diaphragm, wherein the voice coil comprises a voice coil body and a lead wire leading out from the voice coil body, an injection-moulded member is correspondingly arranged at a position where the voice coil lead wire is combed after leading out, and a groove for accommodating the lead wire is formed on the injection-moulded member. The loudspeaker provided by the present invention can reduce the effect of the lead wire on the voice coil without changing the original structure of a side magnetically conductive plate of the loudspeaker and by making full use of magnetic lines of force and ensuring the fixed strength of the lead wire, thereby improving the overall acoustic performance of the loudspeaker.

Description

a speaker

Technical field

The invention relates to the field of electroacoustic technology. More specifically, it relates to a speaker.

Background technique

The speaker is an important acoustic component of an electronic device, and is an energy conversion device capable of converting between an electrical signal and a sound signal, and belongs to the most basic sounding unit. The utility model mainly comprises a casing and a magnetic circuit system and a vibration system fixed on the casing, wherein the vibration system comprises a diaphragm fixed to the casing and a voice coil coupled to one side of the diaphragm, and the voice coil leads are respectively led out from both sides of the voice coil. The voice coil lead is electrically connected to an external circuit to form a loop, and the diaphragm is vibrated and sounded by the principle of electromagnetic induction, thereby realizing the sounding function of the speaker.

A straight line of a voice coil lead commonly used in current speaker design is that the lead wire is placed on the side magnetic conductive plate, and the lead wire is bonded to the side magnetic conductive plate and coated with the lead fixing glue; the defect is that the magnetic line is fully utilized. The side magnetic guide plate generally avoids fewer leads. When the speaker is energized, the lead wire vibrates up and down with the voice coil. Because the lead suspension has a relatively strong pulling force on the voice coil, the sound coil is unbalanced when the speaker is working. Vibration, which causes polarization and affects the acoustic performance of the speaker.

Therefore, there is a need to provide a new speaker structure to solve the problems of the prior art described above.

Summary of the invention

In view of the above problems, the technical problem to be solved by the present invention is to provide a speaker. When the speaker is in operation, the voice coil lead has little influence on the voice coil, and the product is less prone to polarization when working, and the overall acoustic performance of the speaker can be improved.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A speaker includes a housing and a vibration system and a magnetic circuit system housed in the housing, the vibration system including a diaphragm and a voice coil fixedly coupled to the diaphragm, the voice coil including a voice coil body and a lead wire drawn from the voice coil body; an injection molded part is disposed at a position corresponding to the straight line after the voice coil lead is taken out, and a groove for receiving the lead wire is formed on the injection molded part.

In addition, preferably, the magnetic circuit system includes an edge magnetic conductive plate fixed to the housing, and the lead wire of the voice coil is taken out corresponding to a position above the side magnetic conductive plate. The injection molded part is located above the side magnetic conductive plate.

In addition, it is preferred that the injection molded part is formed by the corresponding housing of the injection-molded portion after the voice coil lead is taken out.

In addition, it is preferable that the lead wire includes a meandering suspension portion and a joint portion received in the groove of the injection molded part; the loopback suspension portion is a lead end extending from a side of the voice coil body To the part of the joint.

Further, preferably, the groove is disposed along the wire in a straight line direction, and the groove is coated with a lead fixing glue.

Further, preferably, the housing is rectangular, the housing includes two opposite first sides and two opposite second sides; the side magnetic plate includes at least the housing a first side magnetic conductive plate disposed at one side direction, the injection molded member is correspondingly disposed at an upper position of the first side magnetic conductive plate, and a lateral length of the injection molded member is smaller than that of the first side magnetic conductive plate length.

Furthermore, it is preferred that the edge magnetically permeable plate is injection molded in combination with the housing, the injection molded part being integrally injection molded with the housing.

Further, preferably, the injection molded part includes a base and a convex wall extending from opposite edges of the base toward the base, and the two convex walls and the base form a recess for receiving and fixing the voice coil lead.

Further, preferably, the side magnetic conductive plate includes at least a straight portion disposed in a horizontal direction, and a base of the injection molded member is fixedly fixed to an upper surface of the straight portion.

Further, preferably, the side magnetic conductive plate further includes a second side magnetic conductive plate disposed along a second side of the casing.

The beneficial effects of the present invention are as follows:

Compared with the existing speaker, the speaker provided by the present invention can increase the length of the joint portion in the straight line by shortening the length of the joint portion of the lead wire without changing the structure of the original speaker side magnetic plate, fully utilizing the magnetic line and ensuring the strength of the lead fixing. The way in which the lead leads to the length of the suspended portion effectively reduces the force of the lead pulling the voice coil during vibration, reduces the influence of the lead on the voice coil, makes the product less prone to polarization during operation, and improves the acoustic performance of the speaker as a whole. .

DRAWINGS

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Figure 1 shows a schematic view of the assembly of the loudspeaker provided by the present invention.

2 is a schematic perspective view showing the speaker of the present invention.

FIG. 3 is a schematic view showing the arrangement of a casing and a voice coil in the speaker provided by the present invention.

Fig. 4 is an enlarged schematic view showing a portion A in Fig. 3.

Detailed ways

In order to explain the present invention more clearly, the present invention will be further described in conjunction with the preferred embodiments and the accompanying drawings. Similar components in the drawings are denoted by the same reference numerals. It should be understood by those skilled in the art that the following detailed description is intended to be illustrative and not restrictive.

In order to solve the problem that the traditional speaker has a large force to pull the voice coil by the lead suspension portion, which is easy to cause the voice coil to generate unbalanced vibration when the speaker is working, thereby causing polarization and affecting the acoustic performance of the speaker, the present invention provides a speaker. Structure, the speaker of the structure is in operation, the voice coil lead has little influence on the voice coil, the product is not easy to be polarized when working, and the overall acoustic performance of the speaker can be improved.

Specifically, in conjunction with FIG. 1 to FIG. 4, a speaker includes a housing 1 and a vibration system and a magnetic circuit system fixed to the housing 1; in the illustrated structure, the present invention specifically shows The structure of the housing is a rectangle. It can be understood that the structural style of the housing may be a rectangular parallelepiped shape, a rounded rectangular parallelepiped shape, a rectangular parallelepiped shape or the like, and the invention is not limited thereto. Specifically, the housing 1 includes two opposite first side edges and two opposite second side edges; the corresponding side magnetic conductive plate of the present invention includes a first side direction along the housing And a first side magnetic conductive plate disposed, and further comprising a second side magnetic conductive plate disposed along a second side of the casing. In order to clarify more ambiguity, the first side of the housing is collectively referred to as the long side of the housing, and the second side of the housing is collectively referred to as the short side of the housing, corresponding to the first side of the magnetic plate and the first The two side magnetic plates are collectively referred to as side magnetic plates.

In the speaker according to the present invention, the vibration system includes a diaphragm 2 fixed to the casing 1 and a voice coil 3 fixedly coupled to the diaphragm 2; the voice coil 3 includes a body of the voice coil 3 and is led out from the voice coil body Lead 31. The magnetic circuit system includes an edge magnetic conductive plate 4 fixed to the housing 1 , and the side magnetic conductive plate includes an edge magnetic conductive plate 4 and a ridge along the longitudinal direction of the housing 1 The side magnetic conductive plate 4 is disposed on the side of the short axis of the casing, and the injection molded part 41 is disposed above the side magnetic conductive plate 4 disposed on the side of the long axis of the casing 1, and the lateral length of the injection molded part 41 is smaller than the outer casing. The length of the side magnetic conductive plate 4 provided in the longitudinal direction of the longitudinal axis of the body 1 is formed with a groove for receiving the lead wire 31 on the injection molded part 41.

According to the present invention, by providing the injection molded member 41 on the side magnetic conductive plate 4, it is possible to use an injection molded part having a length shorter than the length of the side magnetic conductive plate 4 without changing the structure of the original speaker side magnetic conductive plate 4 and making full use of the magnetic force lines. 41 is combined with the fixing lead 31 to shorten the length of the fixing portion of the lead 31 and increase the length of the opposite winding portion of the lead 31. Compared with the prior design, the lead wire is retracted after the length is increased, and when the diaphragm vibrates, the lead Pulling the voice coil reduces the force and reduces the lead tone The influence of the circle makes the product less prone to polarization during operation, which improves the acoustic performance of the speaker as a whole.

The lead wire of the present invention includes a meandering suspension portion 311 and a joint portion 312 received in the groove of the injection molded component 41; wherein the loopback suspension portion 311 is a lead-out end extending from a side of the voice coil body To the portion of the joint portion 312, preferably, a relief structure is provided on the casing 1 at a corner position corresponding to the bypass floating portion 311 of the lead wire 31.

In order to facilitate the assembly and positioning of the lead wires 31 and to ensure the fixing strength of the lead wires, preferably, the side magnetic conductive plates 4 include at least a flat portion disposed in a horizontal direction, and the injection molded member 41 includes a base 411 and two by the base plate 411. The opposite edges extend toward the convex wall 412 extending away from the base 411, and the two convex walls 412 and the base 411 form a recess for receiving the lead 31 of the voice coil 3. The base 411 of the injection molded part 41 is fixedly fixed to the upper surface of the straight portion, the groove is arranged along the lead line 31 in the line direction, and the groove is coated with the lead fixing glue.

In addition, in order to simplify the manufacturing process in order to reduce the manufacturing difficulty, preferably, the side magnetic conductive plate 4 is injection-molded with the housing 1 , and the injection molded part 41 is integrally injection molded with the housing 1 .

In the specific illustrated speaker structure of the present invention, FIG. 1 illustrates a magnetic circuit system of an embodiment, the magnetic circuit system further including a lower yoke 5 including a horizontal bottom wall 51, The central magnet 6 is located at a central position of the bottom wall 51. The bottom wall 51 has a side magnet 7 surrounding the central magnet 6. The side magnet 7 is located between the side magnetic conductive plate 4 and the bottom wall 51, and the central magnet 6 is The side magnet 7 forms a magnetic gap that accommodates the voice coil 3. The side magnet 7 can further enhance the magnetic field strength at the magnetic gap in the speaker, and greatly improve the sensitivity of the microspeaker. In addition, the magnetic circuit system of the speaker of the present invention further includes a central magnetic conductive plate 61 connected to the central magnet 6, and the central magnetic conductive plate 61 and the side magnetic conductive plate 4 can provide magnetic permeability for the magnetic circuit system to increase The magnetic circuit system drives the speaker for better acoustic performance.

Different from the above magnetic circuit system structure, as another embodiment, the magnetic circuit system may also be a magnetic circuit system of other structures, such as a three-magnetic circuit structure. Specifically, the magnetic circuit system includes an edge magnetic conductive plate, a lower yoke and a center magnet disposed on the lower yoke; wherein the side magnetic permeable plate described in the embodiment has the same structure and arrangement as the above embodiment; the lower yoke includes a horizontal bottom wall, The central magnet is located at a central position of the bottom wall; the bottom wall includes two opposite first side edges and two opposite second side edges; the first side edges of the bottom wall respectively have a distance away from the bottom a side wall extending in the wall direction; two second side edges of the bottom wall are respectively provided with side magnets, the side magnet is located between the side magnetic conductive plate and the bottom wall, and the central magnet is attached with a central magnetic conductive plate; The magnet and the central magnet and the side wall and the central magnet together form a magnetic gap that accommodates the voice coil. It should be noted that the speaker structure provided by the embodiment has advantages over the prior art and the foregoing implementation method. The formula is the same and will not be described here.

Further, as a further embodiment, the magnetic circuit system may be another magnetic circuit system different from the above two structural forms, such as a single magnetic circuit structure, specifically, a single magnetic circuit system speaker structure, The magnetic circuit system includes a lower yoke and a center magnet disposed on the lower yoke; the lower yoke includes a horizontal bottom wall and a side wall extending from the edge of the bottom wall away from the bottom wall, the center The magnet is located at a central position of the bottom wall, and the central magnet is attached with a central magnetic conductive plate; the side wall and the central magnet form a magnetic gap for accommodating the voice coil. In the single-magnetic circuit system speaker of the structure, the injection-molded member may be formed by being protruded outward from the corresponding housing at the position of the voice coil lead. The injection molded part of such a structure can achieve the same purpose of shortening the length of the lead fixing section and increasing the length of the opposite meandering suspension portion on the lead wire, so that the lead wire of the increased length is returned to the floating portion when the diaphragm is vibrated, as in the above embodiment. The force of the lead pulling the voice coil is reduced, and the influence of the lead on the voice coil is reduced, so that the product is less prone to polarization during operation, and the acoustic performance of the speaker is improved as a whole.

In addition, based on the speaker structure of the single magnetic circuit system described above, the speaker magnetic circuit system may further include an edge magnetic conductive plate, wherein the structure of the side magnetic conductive plate and the arrangement thereof with the housing and the injection molded part are the same as the above three magnetic circuit or The implementation of the fifth magnetic circuit system is the same, and the advantages of the speaker structure provided by the embodiment are the same as those of the prior art, and are not described herein again.

It can be understood by those skilled in the art that for the speaker structure provided by the present invention, the magnetic circuit systems of the above four structural modes can provide stable magnetic field strength to the speaker, and only one specific figure is provided in the figure of the present invention. The magnetic circuit system structure of the five magnetic circuit, but it is not limited, and should not limit the scope of protection of the present invention.

In summary, compared with the existing speaker, the speaker provided by the present invention can be combined in the straight line by shortening the lead wire without changing the structure of the original speaker side magnetic plate, fully utilizing the magnetic line and ensuring the wire fixing strength. The length of the part increases the length of the lead wire to the length of the suspension, effectively reducing the force of the wire pulling the voice coil during vibration, reducing the influence of the wire on the voice coil, making the product less prone to polarization during operation, and improving the overall The acoustic performance of the speaker.

It is apparent that the above-described embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention, and those skilled in the art can also make the above description. It is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

A speaker includes a housing and a vibration system and a magnetic circuit system housed in the housing, the vibration system including a diaphragm and a voice coil fixedly coupled to the diaphragm, the voice coil including a voice coil body and a lead drawn from the voice coil body; characterized by:

An injection molded part is disposed at a position corresponding to the smooth line after the voice coil lead is taken out, and a groove for accommodating the lead is formed on the injection molded part.
A speaker according to claim 1, wherein said magnetic circuit system comprises an edge magnetic conducting plate fixed to said housing, said lead of said voice coil being led to correspond to said side magnetically The position above the plate is in line, and the injection molded part is located above the side magnetic conductive plate.
A speaker according to claim 1, wherein said injection molded member is formed by outwardly projecting a corresponding housing at a position along the line after the voice coil lead is taken out.
The speaker according to any one of claims 1 to 3, wherein the lead wire comprises a meandering suspension portion and a joint portion received in the groove of the injection molded part; the bypassing floating portion is from the voice coil A lead end drawn from one side of the body extends back to a portion of the joint.
A speaker according to any one of claims 1 to 3, wherein said groove is disposed along the direction of said lead wire, and said groove is coated with a lead fixing glue.
A speaker according to claim 2, wherein said housing is rectangular, and said housing includes two opposite first sides and two opposite second sides; said side magnetic plate Included at least with a first side magnetic conductive plate disposed along a first side of the housing, the injection molded member is correspondingly disposed at an upper position of the first side magnetic conductive plate, and a lateral length of the injection molded member is smaller than The length of the first side magnetic conductive plate.
A speaker according to claim 2 or 6, wherein said side magnetic conductive plate is injection-molded with said casing, and said injection molded member is integrally injection molded with said casing.
A speaker according to any one of claims 1 to 3, wherein the injection molded part comprises a base and a convex wall extending from opposite edges of the base toward the base, and the two convex walls and the base are formed to be fixed. a groove of the voice coil lead.
A speaker according to claim 2 or claim 6, wherein said side magnetic conductive plate comprises at least a flat portion disposed in a horizontal direction, and a base of said injection molded member is fixedly fixed to said flat portion surface.
A speaker according to claim 6, wherein said side magnetic conducting plate further comprises a second side magnetic conducting plate disposed along a second side of said housing.