KR102649813B1 - Speaker for earphone having the inner duct structure - Google Patents

Abstract

The present invention relates to a frame; A magnet disposed inside the frame; a plate fixed to the frame and in contact with the magnet; a yoke in contact with the magnet; a diaphragm; and a coil disposed to overlap the plate in a radial direction, wherein the plate has a first area in contact with the magnet and extends from the first area to contact the inner surface of the plate without contacting the magnet. A speaker for earphones may be provided, including a second area, wherein the inner surface of the frame, at least one surface of the second area, and the outer surface of the magnet have an internal duct structure forming an acoustic conduit.

Description

Speaker for earphone having the inner duct structure}

The embodiment relates to a speaker for earphones having an internal duct structure.

A speaker for earphones includes a speaker unit that generates sound waves inside a housing.

The speaker unit may include a diaphragm, a magnet, a coil, and a plate. When an electric current is applied to the coil, the coil becomes magnetic, and due to the electrical interaction between the coil and the plate, the coil moves and the diaphragm moves.

These diaphragms, magnets, coils, and plates can be placed on a frame. In order to enhance and improve the acoustic performance, acoustic ducts can be placed in the speaker. These acoustic ducts can be placed in the frame.

but. When an acoustic duct is formed in a frame, there is a problem in that the size of the frame increases and the structure of the frame becomes complicated. Additionally, when separate members are combined to form an acoustic duct, there is a problem in that the manufacturing process becomes complicated and the configuration of the speaker becomes complicated.

The present invention aims to solve the problem of providing a speaker for earphones that improves acoustic performance by forming an acoustic pipe using the configuration of an existing speaker, while simplifying the configuration.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the description below.

The embodiment includes a frame, a magnet disposed inside the frame, a plate fixed to the frame and in contact with the magnet, a yoke in contact with the magnet, a diaphragm, and a radial direction arranged to overlap the plate. Includes a coil, the plate includes a first area in contact with the magnet, a second area extending from the first area and in contact with the inner surface of the plate without contacting the magnet, and the inner surface of the frame and At least one surface of the second area and the outer surface of the magnet may provide a speaker for earphones having an internal duct structure forming an acoustic duct.

A frame, a magnet disposed inside the frame, a plate fixed to the frame and in contact with the magnet, a diaphragm, a coil disposed to overlap the plate in the radial direction, and between the coil and the frame in the radial direction. A yoke disposed on the plate includes a first area in contact with the magnet, a second area extending from the first area and in contact with an inner surface of the plate without contacting the magnet, and the frame. The inner surface, at least one surface of the second region, and the outer surface of the yoke can provide a speaker for earphones having an internal duct structure forming an acoustic duct.

A side of the inner surface of the frame forms an outer surface of the acoustic pipe, an outer surface of the magnet forms an inner surface of the acoustic pipe, the second area forms a lower surface of the acoustic pipe, and an inner surface of the frame The middle upper surface may form the upper surface of the acoustic pipe.

A side of the inner surface of the frame forms an outer surface of the acoustic duct, an outer surface of the yoke forms an inner surface of the acoustic duct, the second area forms a lower surface of the acoustic duct, and an inner surface of the frame The middle upper surface may form the upper surface of the acoustic pipe.

The acoustic pipe includes a first pipe leading to a first inlet and an outlet, and a second pipe leading to a second inlet and the outlet, and the first inlet and the second inlet are arranged to be spaced apart from the outlet in the circumferential direction. The frame includes a first inlet and a second inlet disposed on one side of the magnet, and the outlet is disposed in the frame. It is disposed on the other side of the magnet, and the first inlet and the second inlet may each communicate with the acoustic pipe.

The size of the first inlet and the size of the second inlet may be different.

The outlet may include a first outlet communicating with the first conduit and a second outlet communicating with the second conduit.

The sizes of the first outlet and the second outlet may be different.

It further includes a tuning part covering the outlet, wherein the tuning part includes a first mesh and a second mesh stacked on the first mesh, and the first mesh includes a first hole aligned with the second outlet. And, the second mesh may include a second hole aligned with the first outlet.

The sizes of the first outlet and the second outlet may be different, and the sizes of the first hole and the second hole may be different.

The acoustic pipe includes a first pipe leading to a first inlet and an outlet, and a second pipe leading to a second inlet and the outlet, and the first inlet and the second inlet are arranged to be spaced apart from the outlet in the circumferential direction. and further includes an outlet block integral with the plate, wherein the outlet block includes a first inlet and a second inlet disposed on one side of the magnet, and the outlet is disposed on the frame. It is disposed on the other side of the magnet, and the first inlet and the second inlet may communicate with the acoustic pipe.

The outlet block may include a first outlet communicating with the first conduit and a second outlet communicating with the second conduit.

The outlet block may include a third outlet where the first outlet and the second outlet are combined to form one outlet.

The outlet block may include a third mesh disposed at the second outlet.

The frame includes a partition wall protruding from an upper surface of the inner surface of the frame forming the acoustic pipe, the partition partitioning the second pipe into a 2-1 pipe and a 2-2 pipe, and the first pipe And the 2-1 pipe may communicate with the first outlet, and the 2-2 pipe may communicate with the second outlet.

According to an embodiment, there is an advantage of improving acoustic performance and simplifying the configuration by forming an acoustic duct structure that extends through the second area of the plate to the outlet.

According to the embodiment, the sound is emitted to the outside from the rear of the speaker, improving sound quality by converting the resonance frequency into high and low frequencies, and increasing or decreasing the sound pressure of the mid and low frequencies and the sound pressure of the high frequencies, so that the original sound It has the advantage of reducing distortion and protecting hearing.

According to the embodiment, the outlet communicating with the acoustic pipe is divided into a first outlet and a second outlet, and the size of the first outlet and the size of the second outlet are different, which has the advantage of realizing optimal sound quality.

According to an embodiment, a first mesh and a second mesh are provided in response to the first outlet and the second outlet, and the first mesh and the second mesh are stacked to provide a single tuning unit, thereby realizing optimal sound quality. It has the advantage of simple configuration.

According to the embodiment, there is an advantage in that the degree of freedom in designing the exterior and internal structure of the frame can be increased by molding the outlet block provided with the first outlet and the second outlet integrally with the plate.

According to the embodiment, by including a partition dividing the acoustic pipe, there is an advantage of improving acoustic characteristics by maximizing the length of the acoustic pipe.

1 is a side cross-sectional view showing a speaker for earphones according to an embodiment;
Figure 2 is a diagram showing a plate;
Figure 3 is a perspective view showing the frame viewed from above;
Figure 4 is a perspective view of the frame viewed from below;
Figure 5 is a cross-sectional view showing a state in which the third plate forming the bottom of the speaker is assembled to the lower side of the frame;
Figure 6 is an enlarged cross-sectional view showing an acoustic pipe;
Figure 7 is a cross-sectional view of a speaker for earphones including an acoustic pipe according to a modification;
Figure 8 is a perspective view showing the yoke and the third plate;
Figure 9 is an enlarged cross-sectional view showing an acoustic pipe according to a modified example;
Figure 10 is a diagram showing the path of sound moving along the acoustic pipe, Figure 11 is a diagram showing the path of sound emitted from the outlet,
Figure 12 is a bottom view of the speaker;
Figure 13 is a cross-sectional view based on AA in Figure 12;
14 is a diagram showing a tuning unit disposed at the outlet;
15 is an exploded view of the tuning unit;
16 is an enlarged view of the tuning unit;
Figure 17 is a perspective view of the third plate with integrated outlet block viewed from above;
Figure 18 is a perspective view of the third plate with integrated outlet block viewed from the bottom;
Figure 19 is a partial cross-sectional view of the speaker for earphones including the third plate shown in Figure 17;
Figure 20 is a perspective view from above of the third plate with integrated outlet block according to a modification;
Figure 21 is a perspective view of the third plate with integrated outlet block viewed from the bottom;
Partial cross-sectional view of the speaker for earphones including the third plate shown in Figure 22,
Figure 23 is a partial cross-sectional view of a speaker for earphones including a partition in the second pipe;
Figure 24 is a bottom view of a frame showing a second pipe divided by a partition wall;
Figure 25 is a partial cross-sectional view of the speaker showing the transport path of sound flowing through the 2-1 pipe and the 2-2 pipe;
Figure 26 is a bottom view of the speaker showing the transport path of sound flowing through the 2-1 pipe and the 2-2 pipe.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. Additionally, terms or words used in this specification and patent claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle that it can be done, it must be interpreted with a meaning and concept consistent with the technical idea of the present invention. And in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention are omitted.

Hereinafter, a speaker for earphones according to an embodiment will be described in detail with reference to the attached drawings.

Figure 1 is a side cross-sectional view showing a speaker for earphones according to an embodiment.

Referring to FIG. 1, in an earphone speaker according to an embodiment, sound generated from a diaphragm is emitted to the outside through an acoustic pipe. At this time, the acoustic duct (D) is formed as a space surrounded by the frame 100, the magnet 200, and a partial area of the plate 300, thereby securing the acoustic duct (D) with a sufficient length without any additional members. There is a characteristic that

A speaker for earphones according to an embodiment may include a frame 100, a magnet 200, a plate 300, a diaphragm 500, and a coil 600.

Frame 100 may be a cylindrical member. The frame 100 has a space inside where the magnet 200, the plate 300, the diaphragm 500, and the coil 600 are located.

The magnet 200 electromagnetically interacts with the coil 600. The magnet 200 may include a first magnet 210 and a second magnet 220. The first magnet 210 is disposed outside the second magnet 220. The first magnet 210 may be fixed to the frame 100.

The first magnet 210 may be an annular member, and the second magnet 220 may be a cylindrical member.

The plate 300 contacts the magnet 200 to form a magnetic field. The plate 300 may include a first plate 310, a second plate 320, and a third plate 330.

The first plate 310 is an annular member and may be disposed on one surface of the first magnet 210. The second plate 320 is a disk-shaped member and may be placed on one surface of the second magnet 220. The third plate 330 may be disposed on the other surface of the first magnet 210 and the other surface of the second magnet 220.

The third plate 330 may include a first area (A1) and a second area (A2). The first area A1 is an area in contact with the magnet 200, and the second area A2 is an area that extends outward from the first area A1 and does not contact the magnet 200.

The outer edge of the second area A2 may be press-fitted into the inner wall of the frame 100.

The diaphragm 500 is for reproducing sound. The diaphragm 500 may be fixed to the frame 100.

The coil 600 is fixed to the diaphragm 500. And the coil 600 is disposed between the first plate 310 and the second plate 320 in the radial direction. And the coil 600 is disposed between the first magnet 210 and the second magnet 220.

When current is applied to the coil 600, the coil 600 has magnetism. The coil 600 moves according to the magnetic force configuration. If the polarity of the coil 600 is the same as that of the plate 300, the coil 600 is pushed and moves. On the other hand, if the polarity of the coil 600 is different from the polarity of the plate 300, the coil 600 is pulled and moves. According to this principle, when the coil 600 moves, the diaphragm 500 moves to vibrate the air and generate sound.

Figure 2 is a diagram showing the plate 300.

Referring to Figures 1 and 2, the plate 300 is divided into a first area (A1) and a second area (A2). The first area A1 may include an annular rib 301 protruding from the upper surface. The second magnet 220 contacts the first area A1 located inside the rib 301, and the first magnet 210 contacts the second area A2 located outside the rib 301. do.

FIG. 3 is a perspective view of the frame 100 viewed from above, and FIG. 4 is a perspective view of the frame 100 viewed from below.

Referring to FIGS. 3 and 4 , the frame 100 may include a first inlet (E1) and a second inlet (E2) on the upper surface. The first inlet (E1) and the second inlet (E2) are arranged to be spaced apart in the circumferential direction. The size of the first inlet (E1) and the size of the second inlet (E2) may be different. And the frame 100 may include outlets O1 and O2 on its lower surface. The outlets O1 and O2 may include a first outlet O1 and a second outlet O2 of different sizes.

Figure 5 is a cross-sectional view showing a state in which the third plate 300 forming the bottom of the speaker is assembled to the lower side of the frame 100.

Referring to FIG. 5, the second magnet 220 is seated on the third plate 300, and the second plate 320 is seated on one surface of the second magnet 220 to be assembled to the frame 100. You can. As the outer edge of the third frame 100 is pressed into the inner surface of the frame 100, the third plate 330 may form the bottom of the speaker for earphones.

Figure 6 is an enlarged cross-sectional view showing the acoustic pipe (D).

Referring to Figures 1 and 6, the acoustic pipe (D) includes the side surface 101 and the top surface 102 of the inner surface of the frame 100, one surface 331 of the second area A2, and the first magnet 210. It can be formed surrounded by the outer surface of. The side surface 101 is disposed to face the outer surface of the first magnet 210, and the top surface 102 is disposed to face one surface 331 of the second area A2.

The side 101 forms the outer surface of the acoustic duct (D), the outer surface of the first magnet 210 forms the inner surface of the acoustic duct (D), and one surface 331 of the second area (A2) It forms the lower surface of the acoustic pipe (D).

Referring to FIGS. 3, 4, and 6, this acoustic pipe (D) has a first inlet (E1), a second inlet (E2), a first outlet (O1), and a second outlet arranged in the frame 100. It communicates with (O2).

FIG. 7 is a cross-sectional view of an earphone speaker including an acoustic pipe (D) according to a modified example, and FIG. 8 is a perspective view showing the yoke and the third plate 330.

Referring to FIGS. 7 and 8, the speaker for earphones including the acoustic pipe (D) according to the modified example has only one magnet disposed on the inside, which is disposed in the second area (A2) of the third plate 330. It includes a cylindrical yoke (400). The lower end of the yoke 400 may contact the second area A2 of the third plate 330. The yoke 400 is disposed on the outside of the second magnet 220 with a space therebetween in the radial direction. The coil may be disposed between the yoke 400 and the second magnet 220.

Figure 9 is an enlarged cross-sectional view showing an acoustic pipe (D) according to a modified example.

Referring to Figures 7 to 9. The acoustic pipe (D) according to the modified example is the side surface (101) and the top surface (102) of the inner surface of the frame (100), one surface (331) of the second area (A2), and the yoke (400). It may be formed surrounded by an outer surface 401. The side surface 101 is disposed to face the outer surface of the first magnet 210, and the top surface 102 is disposed to face the one surface 331 of the second area A2.

The side 101 forms the outer surface of the acoustic duct (D), the outer surface of the yoke 400 forms the inner surface of the acoustic duct (D), and one surface 331 of the second area (A2) forms the acoustic duct (D). It forms the lower surface of (D).

FIG. 10 is a diagram showing the path of sound moving along the acoustic pipe D, and FIG. 11 is a diagram showing the path of sound emitted from the outlets O1 and O2.

Referring to FIGS. 1, 10, and 11, the acoustic pipe (D) may include a first pipe (D1) and a second pipe (D2).

The first pipe (D1) is connected to the first inlet (E1) and outlets (O1, O2). The second pipe (D2) is connected to the second inlet (E2) and outlets (O1, O2). When the outlets (O1, O2) include a first outlet (O1) and a second outlet (O2), the first pipe (D1) is connected to the first outlet (O1), and the second pipe (D2) is connected to the second outlet (O1). Connects to exit (O2).

Hereinafter, the movement path of sound flowing into the acoustic pipe (D) through the first inlet (E1) and heading to the outlets (O1, O2) is referred to as the first path (P), and the sound passage through the second entrance (E2) is referred to as the first path (P). The path of sound flowing into (D) and heading to the exit (O1, O2) is called the second path (T).

The first path (P) can be divided into a 1-1 path (P1) and a 1-2 path (P2). The 1-1 path (P1) is the movement path of sound that flows into the acoustic pipe (D) through the first inlet (E1) and heads to the first outlet (O1), and the 1-2 path (P2) is the first path (P2). This is the path of sound that flows into the acoustic pipe (D) through the inlet (E1) and heads to the second outlet (O2).

The second path (T) can be divided into a 2-1 path (T1) and a 2-2 path (T2). The 2-1 path (T1) is the movement path of sound that flows into the acoustic pipe (D) through the second inlet (E2) and heads to the first outlet (O1), and the 2-2 path (T2) is the second path (T2). This is the path of sound that flows into the acoustic pipe (D) through the inlet (E2) and heads to the second outlet (O2).

The sound generated from the diaphragm 500 flows into the first pipe (D1) through the first inlet (E1) and is discharged directly to the first outlet (O1) through the first pipe (D1). You can move along (P1). In addition, the sound generated from the diaphragm 500 flows into the first pipe (D1) through the first inlet (E1), and passes through the first pipe (D1) and the second pipe (D2) to the second outlet (O2). It can move along the 1-2 path (P2) that is emitted. The 1-2 path (P2) is formed to be longer than the 1-1 path (P1).

Meanwhile, the sound generated from the diaphragm 500 flows into the first pipe (D1) through the second inlet (E2), and is discharged to the first outlet (O1) through the first pipe (D1). You can move along the path (T1). In addition, the sound generated from the diaphragm 500 can flow into the second pipe (D2) through the first inlet (E1) and move along the 2-2 path (T2) discharged through the second outlet (O2). there is.

The first pipe D1 and the second pipe D2 may have different lengths and cross-sectional areas.

Figure 12 is a bottom view of the speaker, and Figure 13 is a cross-sectional view taken along line A-A of Figure 12.

Referring to FIGS. 12 and 13 , the outlets O1 and O2 communicating with the acoustic pipe D may be divided into a first outlet O1 and a second outlet O2. The first outlet (O1) and the second outlet (O2) may have different cross-sectional sizes. Accordingly, the amount of sound emitted through the first outlet O1 and the amount of sound emitted through the second outlet O2 may be different. These sound discharge ports (O1, O2) have the advantage of being able to realize optimal sound quality by changing the resonant frequency.

FIG. 14 is a diagram showing the tuning unit 700 disposed at the outlets O1 and O2, FIG. 15 is an exploded view of the tuning unit 700, and FIG. 16 is an enlarged view of the tuning unit 700.

Referring to FIGS. 14 to 16 , a tuning unit 700 covering the outlets O1 and O2 may be provided. The tuning unit 700 is intended to change timbre or sound characteristics, and may be made of a mesh material and may include polyester, nylon, non-woven fabric, a membrane filter, etc.

Since the cross-sectional size of the first pipe (D1) and the first outlet (O1) and the cross-sectional size of the second pipe (D2) and the second outlet (O2) are different from this tuning unit 700, the first outlet ( It is difficult to use a tuning unit 700 with the same characteristics for O1) and the second outlet O2. Therefore, the tuning unit 700 has a dual configuration consisting of a first mesh 710 and a second mesh 720, so that it corresponds to the first outlet O1 and the second outlet O2 having different acoustic characteristics. .

As an example, the tuning unit 700 may include a first mesh 710 and a second mesh 720 stacked on the first mesh 710. An adhesive 730 is located between the first mesh 710 and the second mesh 720, an adhesive 730 is located on the upper surface of the first mesh 710, and an adhesive 730 is also located on the lower surface of the second mesh 720. ) is located.

The first mesh 710 includes a first hole 711. The first hole 711 is aligned with the second outlet O2. The second mesh 720 includes a second hole 721. The second hole 721 is aligned with the first outlet O1. Since the first mesh 710 and the second mesh 720 have different acoustic impedances, the first mesh 710 and the second mesh 720 are connected to the first outlet (O1) and the second outlet (O2). Each can be matched. The adhesive 730 may include a third hole 731 aligned with the first hole 711 and the second hole 721, respectively.

Figure 17 is a perspective view of the third plate 330 with the outlet block 800 integrated from the top, Figure 18 is a perspective view of the third plate 330 with the outlet block 800 integrated from the bottom, and Figure 19 is a partial cross-sectional view of the speaker for earphones including the third plate 330 shown in FIG. 17.

17 to 19, the outlet block 800 may include a first outlet O1 and a second outlet O2 penetrating one side and the other side of the outlet block 800.

This outlet block 800 may be made of plastic resin, and may be molded integrally with the third plate 330 to be disposed near the outer edge of the third plate 330.

When the third plate 330 is coupled to the frame 100, the first outlet (O1) and the second outlet (O2) communicate with the acoustic pipe (D). The first outlet (O1) communicates with the first conduit (D1), and the second outlet (O2) communicates with the second conduit (D2). The sound passing through the first outlet (O1) and the sound passing through the second outlet (O2) are completely separated and emitted.

Figure 20 is a perspective view of the third plate 330 with the outlet block 800 integrated according to a modification as seen from the top, and Figure 21 is a perspective view of the third plate 330 with the outlet block 800 integrated from the bottom. This is a partial cross-sectional view of the speaker for earphones including the third plate 330 shown in FIG. 22.

20 to 22, the outlet block 800 according to the modified example includes a first outlet (O1) and a second outlet (O2) disposed on one side of the outlet block 800, and the outlet block 800 ) may include a third outlet (O3) disposed on the other side. The third outlet (O1, O2) is combined with the first outlet (O1) and the second outlet (O2) to form one outlet (O1, O2).

This outlet block 800 may be made of plastic resin, and may be molded integrally with the third plate 330 to be disposed near the outer edge of the third plate 330.

The outlet block 800 includes a step surface 801, and the first outlet O1 may be disposed on the step surface 801. The tuning unit 700 is mounted on the stepped surface 801. The sound passing through the first outlet (O1) and the sound passing through the second outlet (O2) are completely separated and emitted. The acoustic characteristics of the sound passing through the first outlet O1 may be changed through the tuning unit 700.

The sound passing through the first outlet (O1) and the sound passing through the second outlet (O2) are combined and emitted from the third outlet (O3).

FIG. 23 is a partial cross-sectional view of an earphone speaker including a partition wall 110 in the second pipe D2, and FIG. 24 is a view of the frame 100 showing the second pipe D2 partitioned by the partition wall 110. This is the bottom view.

23 and 24, the frame 100 may include a partition wall 110. The partition wall 110 protrudes from the upper surface forming the second pipe D2 among the inner surfaces of the frame 100. This partition wall 110 divides the second pipe D2 into a 2-1 pipe D2_1 and a 2-2 pipe D2_2.

Figure 25 is a partial cross-sectional view of the speaker showing the transport path of sound flowing through the 2-1 pipe (D2_1) and the 2-2 pipe (D2_2), and Figure 26 is a partial cross-sectional view of the 2-1 pipe (D2_1) and the 2-2 pipe. -2 This is a bottom view of the speaker showing the transport path of sound flowing through the pipe (D2_2).

Referring to Figures 22, 25, and 26, the first pipe (D1) and the 2-1 pipe (D2_1) communicate with the first outlet (O1). And the 2-2 conduit (D2_2) communicates with the second outlet (O2). The sound moving along the 2-1 pipe (D2_1) flows into the first outlet (O1) through the tuning unit 700 along with the sound moving along the first pipe (D1) and flows into the third outlet (O3). It is released. Sound moving along the 2-2 pipe (D2_2) flows into the second outlet (O2) and is discharged through the third outlet (O3).

Above, the speaker for earphones having an internal duct structure according to a preferred embodiment of the present invention has been examined in detail with reference to the attached drawings.

The embodiment of the present invention described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the claims to be described later rather than the detailed description given above. And the meaning and scope of this patent claim, as well as all changes or modifiable forms derived from the equivalent concept, should be construed as being included in the scope of the present invention.

D: Acoustic duct
D1: 1st conduit
D2: Second conduit
100: frame
200: Magnet
300: plate
310: first plate
320: second plate
330: third plate
400: York
500: Vibration plate
600: coil

Claims (15)

frame;
A magnet disposed inside the frame;
a plate fixed to the frame and in contact with the magnet;
a yoke in contact with the magnet;
diaphragm; and
It includes a coil arranged to overlap the plate in a radial direction,
The plate includes a first area in contact with the magnet, and a second area extending from the first area and in contact with the inner surface of the frame without contacting the magnet,
The inner surface of the frame, at least one surface of the second area, and the outer surface of the magnet form an acoustic duct,
The acoustic pipe includes a first pipe leading to a first inlet and an outlet, and a second pipe leading to a second inlet and the outlet,
In the circumferential direction, the first inlet and the second inlet are respectively arranged to be spaced apart from the outlet,
The frame includes a first entrance and a second entrance disposed on one side of the magnet,
The outlet is disposed in the frame. disposed on the other side of the magnet,
The first inlet and the second inlet each have an internal duct structure in communication with the acoustic pipe. frame;
A magnet disposed inside the frame;
a plate fixed to the frame and in contact with the magnet;
tympanum;
A coil disposed to overlap the plate in a radial direction; And
It includes a yoke disposed between the coil and the frame in a radial direction,
The plate includes a first area in contact with the magnet, and a second area extending from the first area and in contact with the inner surface of the frame without contacting the magnet,
The inner surface of the frame, at least one surface of the second region, and the outer surface of the yoke form an acoustic duct,
A side of the inner surface of the frame forms an outer surface of the acoustic pipe,
The outer surface of the yoke forms the inner surface of the acoustic pipe,
The second region forms a lower surface of the acoustic pipe,
A speaker for earphones wherein the upper surface of the inner surface of the frame has an internal duct structure forming the upper surface of the acoustic pipe. According to claim 1,
A side of the inner surface of the frame forms an outer surface of the acoustic pipe,
The outer surface of the magnet forms the inner surface of the acoustic pipe,
The second region forms a lower surface of the acoustic pipe,
A speaker for earphones wherein the upper surface of the inner surface of the frame has an internal duct structure forming the upper surface of the acoustic pipe. delete According to clause 2,
The acoustic pipe includes a first pipe leading to a first inlet and an outlet, and a second pipe leading to a second inlet and the outlet,
In the circumferential direction, the first inlet and the second inlet are respectively arranged to be spaced apart from the outlet,
The frame includes a first entrance and a second entrance disposed on one side of the magnet,
The outlet is disposed in the frame. disposed on the other side of the magnet,
The first inlet and the second inlet each have a duct structure in communication with the acoustic pipe. According to clause 5,
A speaker for earphones in which the size of the first inlet and the size of the second inlet are different. According to clause 5,
The outlet is a speaker for earphones having an internal duct structure including a first outlet in communication with the first pipe and a second outlet in communication with the second pipe. According to clause 7,
A speaker for earphones having an internal duct structure in which the first outlet and the second outlet have different sizes. According to clause 7,
Further comprising a tuning part covering the outlet,
The tuning unit includes a first mesh and a second mesh stacked on the first mesh,
The first mesh includes a first hole aligned with the second outlet,
The second mesh is a speaker for earphones having an internal duct structure including a second hole aligned with the first outlet. According to clause 9,
The size of the first outlet and the size of the second outlet are different,
A speaker for earphones having an internal duct structure in which the sizes of the first hole and the size of the second hole are different. According to claim 1 or 2,
The acoustic pipe includes a first pipe leading to a first inlet and an outlet, and a second pipe leading to a second inlet and the outlet,
In the circumferential direction, the first inlet and the second inlet are respectively arranged to be spaced apart from the outlet,
Further comprising an outlet block integral with the plate,
The outlet block includes a first inlet and a second inlet disposed on one side of the magnet,
The outlet is disposed in the frame. disposed on the other side of the magnet,
The first inlet and the second inlet have an internal duct structure communicating with the acoustic pipe. According to claim 11,
The outlet block is a speaker for earphones having an internal duct structure including a first outlet in communication with the first pipe and a second outlet in communication with the second pipe. According to claim 12,
The outlet block is a speaker for earphones having an internal duct structure including a third outlet where the first outlet and the second outlet are combined to form one outlet. According to claim 13,
The outlet block is a speaker for earphones having an internal duct structure including a third mesh disposed at the second outlet. According to claim 14,
The frame includes a partition protruding from an upper surface of an inner surface of the frame forming the acoustic duct,
The partition wall divides the second pipe into a 2-1 pipe and a 2-2 pipe, and the
The first pipe and the 2-1 pipe communicate with the first outlet, and the 2-2 pipe communicates with the second outlet. A speaker for earphones having an internal duct structure.

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