KR100809363B1 - Speaker and manufacturing method of speaker - Google Patents

Abstract

The present invention relates to a speaker and a method for manufacturing a speaker, the speaker according to the present invention, the fitting pin having a predetermined length; A yoke in which a fitting hole into which the fitting pin is fitted is formed; A magnet having a communication hole through which the fitting pin passes; A plate in which a fitting hole into which the fitting pin is fitted is formed; A voice coil which vibrates by generating a magnetic field that interferes with a magnetic field generated by the magnet by an input electrical signal; And a diaphragm for vibrating together to generate a sound pressure according to the vibration of the voice coil, wherein the sound pressure of the diaphragm is communicated with the outside of the bottom side of the yoke through the periphery of the fitting pin. A distance from a specific point on the inner circumferential surface of the fitting hole, the communication hole and the fitting hole to a center on the flat cross section of the fitting pin is longer than the radius of the cross section. Accordingly, the output of the low frequency band can be improved to provide a speaker of improved sound quality.

Speaker, pipe, yoke, hall

Description

SPEAKER AND MANUFACTURING METHOD OF SPEAKER}

1 is a view for explaining a conventional speaker equipped with a pipe.

Figure 2 is a graph according to the sound quality comparison experiment according to whether or not the sound pressure of the center of the diaphragm communicate with the outside of the bottom side of the yoke.

Figure 3 is an exploded perspective view showing a cross section of the speaker according to the first embodiment of the present invention.

4 is an exploded perspective view showing a cross section of a speaker according to a second embodiment of the present invention;

5 is a cross sectional view of a combination of a speaker according to a second embodiment of the present invention;

6 is a conceptual diagram for explaining a communication relationship between the bottom of the yoke and the top of the plate in the speaker according to the second embodiment of the present invention;

7 is a view for explaining a speaker manufacturing method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

21,121: Fit pin

22,122: York

22a, 122a: fitting hole 22b: protrusion

23,123: Magnet

23a, 123a: Communication hole

24,124: Plate

24a, 124a: fitting hole

25,125: Voice coil 26,126: Vibration plate

The present invention relates to a speaker, and more particularly, to a technology for improving the sound quality of the speaker by allowing the inside of the speaker to communicate with the bottom surface of the yoke center.

A speaker is an apparatus that converts an electrical signal into a voice signal and is applied to various acoustic devices.

1 shows a conventional speaker, as shown in FIG. 1, a conventional speaker includes a magnet 13, a plate 14, a voice coil 15, a diaphragm 16, and a yoke 12. It includes.

The magnet 13 is attached to the bottom of the yoke 12 and the plate 14 is positioned on the magnet 13. Therefore, the magnetic field generated by the magnet 13 is collected by the yoke 12 and the plate 14, and the magnetic field generated by such a magnet interferes with the magnetic field due to the electrical signal input to the voice coil 15, The voice coil 15 vibrates. The diaphragm 16 is fixed to the upper end of the voice coil 15, a predetermined portion of the inner side, the outer peripheral surface is fixed to the yoke 12, thereby generating a sound pressure by vibrating together in accordance with the vibration of the voice coil.

The conventional speaker shown in Fig. 1 improves the acoustic characteristics. That is, the fitting hole 12a, the communication hole 13a, and the fitting hole 14a are formed in the yoke 12, the magnet 13, and the plate 14, respectively, and the pipe 11 is inserted here and the plate (14) The space A in the upper portion communicates with the bottom surface of the yoke 12 through the pipe hole 11a. That is, by allowing the sound pressure at the center of the diaphragm 16 to communicate with the bottom surface of the yoke 12 through the pipe hole 11a, the vibration characteristics of the diaphragm 16 are improved, thereby improving the low band output of the sound output from the speaker. It was made to be possible. Comparing the data from the experiment of FIG. 2, it can be seen that the output of the low band is improved. That is, it is possible to provide a higher quality sound to the user by improving the acoustic characteristics of the low-end band.

However, in such a conventional speaker, a pipe 11 is used to communicate the center of the diaphragm 16 with the bottom surface of the yoke 12. The pipe 11 is difficult to manufacture, and a pipe hole 11a is formed therein. Since it is difficult to store the durability is difficult, there is a problem that the manufacturing cost of the entire speaker rises and workability is lowered. In particular, when manufacturing small speakers such as earphones, mobile phones, and MP3 players, that is, microspeakers, smaller pipes must be used, and more difficult work is required to form pipe holes in such small pipes. Therefore, there is a problem that the unit cost of the pipe for the entire unit price of the speaker is further increased.

The present invention has been made to solve the above-described problems, the manufacturing cost is lowered manufacturing cost and easy to manufacture, so that the space in the center of the diaphragm can communicate with the bottom of the yoke without using expensive pipes It is an object of the present invention to provide a speaker and a method for manufacturing the speaker.

Speaker according to the present invention for achieving the above object, the fitting pin having a predetermined length; A yoke in which a fitting hole into which the fitting pin is fitted is formed; A magnet having a communication hole through which the fitting pin passes; A plate in which a fitting hole into which the fitting pin is fitted is formed; A voice coil which vibrates by generating a magnetic field that interferes with a magnetic field generated by the magnet by an input electrical signal; And a diaphragm for vibrating together to generate a sound pressure according to the vibration of the voice coil, wherein the sound pressure of the diaphragm is communicated with the outside of the bottom side of the yoke through the periphery of the fitting pin. A distance from a specific point on the inner circumferential surface of the fitting hole, the communication hole and the fitting hole to a center on the flat cross section of the fitting pin is longer than the radius of the cross section.

Here, it is preferable that the distance from the other point on the inner circumferential surface of the fitting hole to the center on the flat cross section of the fitting pin is shorter than the radius of the flat cross section of the fitting pin.

In addition, the fitting hole formed in the plate is preferably square.

On the other hand, the speaker manufacturing method according to the present invention for achieving the above object, the fitting pin fixing step of bending the protrusion projecting inwardly of the fitting hole by inserting the fitting pin into the curved fitting hole formed in the yoke; A magnet fixing step of fixing the curved protrusion by inserting the bent protrusion into a communication hole formed in a magnet; And a plate fixing step of fitting the upper side of the fitting pin into the fitting hole formed in the plate. It includes.

Hereinafter, preferred embodiments will be described so that the present invention described above can be understood in more detail.

< First embodiment >

3 is a perspective view showing a cross section of a speaker according to a first embodiment of the present invention; As shown in FIG. 3, the speaker according to the present invention includes a fitting pin 121, a yoke 122, a magnet 123, a plate 124, a voice coil 125, and a diaphragm 126.

The fitting pin 121 has a cylindrical shape and is fitted into the fitting hole 122a, the communication hole 123a, and the fitting hole 124a formed in the yoke 122, the magnet 123, and the plate 124 which will be described later. Allow each component to be fixed.

The yoke 122 accommodates and supports the magnet 123, the plate 124, the voice coil 125, and the diaphragm 126 inside. At this time, the fitting hole 122a is formed in the substantially center of the yoke 122. The fitting hole 122a has the sound pressure of the diaphragm 126 through the periphery of the fitting pin 121 at the bottom surface side of the yoke 122. It is formed to communicate with the outside. Detailed description thereof will be made later.

The magnet 123 generates a magnetic field. In addition, a communication hole 123a is formed in the center of the magnet 123 in the vertical direction. Referring to FIG. 3, the fitting pin 121 passes through the communication hole 123a of the magnet 123. In addition, the communication hole 123a of the magnet 123 is also formed so that the sound pressure of the diaphragm 126 can communicate with the outside of the bottom side of the yoke 122 through the peripheral portion of the fitting pin 121.

The plate 124 collects the magnetic field generated by the magnet 123. In addition, the fitting hole 124a is formed in the center of the plate 124, and the upper side of the fitting pin 121 is fitted and fixed. Similar to the yoke 122 and the magnet 123, the fitting hole 124a through which the fitting pin 121 passes or is fitted also has a negative pressure of the diaphragm 126 through the periphery of the fitting pin 121. It is formed to communicate with the outside of the side.

Here, the fitting hole 122a, the communication hole 123a and the fitting hole 124a are formed so that the sound pressure of the diaphragm 126 can communicate with the outside of the bottom side of the yoke 122, the fitting pin 121 The distance from the specific point on the inner circumferential surface of the fitting hole 122a, the communication hole 123a, and the fitting hole 124a is longer than the radius of the flat cross section. That is, the fitting pin 121 is tightly fitted, but at least one or more holes are vertically drilled at a specific point along the circumference of the fitting pin 121, and the fitting hole 122a and the communication hole 123a are formed. And the fitting hole 124a is formed.

The voice coil 125 is provided in a cylindrical shape on the outside of the magnet 123, and vibrates by generating a magnetic field that interferes with a magnetic field generated by the magnet 123 by an input electric signal.

The diaphragm 126 is provided with a thin thin plate-shaped film, and a portion of the diaphragm is fixed to the upper end of the voice coil 125, and the outer end is fixed to the outer circumferential surface of the yoke 122, thereby preventing vibration of the voice coil 125. Thus vibrating together to generate sound pressure.

As described above, by allowing the center point of the diaphragm 126 to communicate with the outside of the bottom side of the yoke 122 along the circumference of the fitting pin 121, the bass output of the speaker can be improved, and in addition, This eliminates the need for technology pipes, reducing manufacturing costs and improving workability.

Meanwhile, a printed circuit board (PCB) (not shown) for providing an electrical signal to the voice coil 125 is attached to the bottom of the yoke 122. The yoke is also attached to the printed circuit board for air communication. A hole corresponding to the fitting hole 122a formed in the 122 may be formed.

Various applications can be envisioned within the scope of the first embodiment to allow air to communicate along the circumference of the fitting pin. Hereinafter, other embodiments will be described in detail with reference to FIGS. 4 to 6.

< Second embodiment >

4 is an exploded perspective view showing a cross section of a speaker according to a second embodiment of the present invention. As shown in FIG. 4, the speaker according to the second embodiment of the present invention includes a fitting pin 21, a yoke 22, a magnet 23, a plate 24, a voice coil 25, and a diaphragm 26. ).

The fitting pin 21 has a cylindrical shape and is fitted into the fitting hole 22a, the communication hole 23a, and the fitting hole 24a formed in the yoke 22, the magnet 23, and the plate 24 which will be described later. Passage allows the respective components to be fixed, and through the fitting hole 22a, the communication hole 23a, and the fitting hole 24a, the base of the passageway allows the center of the diaphragm 26 to communicate with the bottom of the yoke 22. do.

The yoke 22 accommodates and supports the magnet 23, the plate 24, the voice coil 25, and the diaphragm 26 inside. At this time, the fitting hole 22a is formed in the substantially center of the yoke 22, and the fitting hole 22a faces the fitting pin 21 (just before the fitting pin 21 is fitted into the fitting hole 22a). In contact with), the inner circumference of the outer circumferential surface of the fitting pin 21 is alternately formed so that the inner circumferential surface of the fitting hole 22a is located. That is, when the fitting pin 21 is fitted, the distance from the specific point of the inner circumferential surface of the fitting hole 22a to the center on the flat cross section of the fitting pin 21 is longer than the radius of the flat cross section of the fitting pin 21. , The distance from the other point to the center on the planar cross-section of the fitting pin 21 is to form the fitting hole 22a to be short. At this time, the protrusion 22b of the yoke 22 protruding inward of the outer circumferential surface of the fitting pin 21 is bent upward when the fitting pin 21 is fitted. As the fitting pin 21 is fitted, the protrusion 22b may be bent with reference to FIG. 5. In the present embodiment, the fitting hole 22a is formed to have a substantially cross shape. However, since the cross section is shown in FIGS. 4 and 5, only a part of the cross fitting hole 22a is shown, and the communication of FIG. In the drawings for explaining the relationship, the cross fitting holes 22a can be seen.

The magnet 23 generates a magnetic field. In addition, a communication hole 23a is formed in the center of the magnet 23 in the vertical direction. Referring to FIG. 3, the fitting pin 21 passes through the communication hole 23a of the magnet 23, and downwardly, the protrusion 22b of the yoke 22 bent upward is fitted and fixed. Therefore, a space having a predetermined width is formed between the outer circumferential surface of the fitting pin 21 and the inner circumferential surface of the communication hole 23a.

The plate 24 collects the magnetic field generated by the magnet 23. In addition, the fitting hole 24a is formed in the center of the plate 24, and the upper side of the fitting pin 21 is fitted and fixed. At this time, the fitting hole 24a is formed so that a plurality of points of the inner circumferential surface in contact with the fitting pin 21, in the present embodiment, the fitting hole 24a is formed in a square shape, and the fitting pin 21 is in contact with four sides. To lose. Of course, the fitting holes are also formed in other forms of rectangles and polygons, but still meet the purposes of the present invention. Figure 6 is a speaker according to the second embodiment of the present invention, the fitting pin 21, the yoke 22, the magnet 23 and the plate 24 are coupled to explain the air communication in the vertical direction Conceptual diagram. This will be described later.

The voice coil 25 is provided in a cylindrical shape on the outside of the magnet 23, and vibrates by generating a magnetic field that interferes with a magnetic field generated by the magnet 23 by an input electric signal.

The diaphragm 26 is provided with a thin thin plate-like film, and a portion of the diaphragm is fixed to an upper end of the voice coil 25, and an outer end thereof is fixed to an outer circumferential surface of the yoke 22 to prevent vibration of the voice coil 25. Thus vibrating together to generate sound pressure.

Referring to Figure 6, in the speaker according to the present invention will be described the relationship that the central point of the diaphragm 26 communicates with the bottom surface of the yoke 22 as follows. FIG. 6 is a diagram for explaining a communication relationship, and is a conceptual view from above of the components except for the diaphragm 26, the voice coil 25, and the plate 24. FIG. Here, the trace for the fitting hole 24a of the plate 24 is shown as 24a. First, the outer circumferential surfaces of the fitting pins 21 are in contact with each of the four sides of the square fitting holes 24a formed in the plate 24. Accordingly, four corner portions B of the fitting holes 24a are allowed to pass through air. It becomes the passage that can be. In addition, since the communication hole 23a formed in the magnet 23 does not completely contact the outer circumferential surface of the fitting pin 21 and has a predetermined width, air may pass therethrough. Then, the protrusion 22b of the yoke 22 is folded up while the fitting pin 21 is fitted, thereby fixing the fitting pin 21, and air can communicate through the fitting hole 22a around the yoke 22. Will be. That is, the air can pass in the up and down directions of four points, such as B, to improve the vibration characteristics of the diaphragm 26, to improve the bass output of the speaker, and to provide users with higher quality sound. It can be.

On the other hand, a printed circuit board (PCB) (not shown) for providing an electrical signal to the voice coil 25 is attached to the bottom of the yoke 22, and the yoke is also attached to the printed circuit board for air communication. A hole corresponding to the fitting hole 22a formed in the 22 may be formed.

Hereinafter, a speaker manufacturing method according to an exemplary embodiment of the present invention will be described with reference to FIG. 7.

1.Fitting pin fixing step <S501>

First, the fitting pin 21 is inserted into the curved fitting hole 22a formed in the yoke 22 to bend the protrusion 22b projecting inwardly of the fitting hole 22a. The fitting pin 21 fitted into the fitting hole 22a is firmly fixed because the protrusion 22b is pressed on both sides.

2. Magnet fixing step <S502>

The bent protrusion 22b is inserted into the communication hole 23a formed in the magnet 23 to fix the magnet 23. The diameter of the communication hole (23a) is made larger than the diameter of the fitting pin 21, it is fixed by pressing down the inclined surface of the upper side of the raised projection (22b).

3. Plate fixing step <S503>

The upper side of the fitting pin 21 is inserted into the fitting hole 24a formed in the plate 24 to fix the plate 24. The fitting hole 24a is preferably a polygon such as a square, but a plurality of inner points of the fitting hole 24a may be fixed by being fitted in contact with the outer circumferential surface of the fitting pin 21, and the non-contacting point, that is, the square In the case of the fitting hole 24a, air may be communicated to the four corners.

4. Diaphragm fixing step <S504>

The diaphragm 26 to which the voice coil 25 is fixed to the lower side is fixed to the outer peripheral surface of the yoke 22.

As described above, by allowing the yoke 22, the magnet 23 and the plate 24 to be fixed by using the fitting pin 21, the manufacturing cost is low, and the assembly process is easy, and By making the center point of the diaphragm 26 communicate with the bottom surface of the yoke 22, it is possible to provide a speaker having a high low-band output and improved acoustic characteristics.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but the above-described embodiments have been described by way of example only, and thus the present invention is limited to the above embodiments. It should not be understood that the scope of the present invention is to be understood by the claims and equivalent concepts described below.

According to the present invention as described in detail above, by allowing the diaphragm center point to communicate with the bottom surface of the yoke through the periphery of the fitting pin, the operation cost is improved while the unit price is low, and the output of the low band is improved. Sound can be provided to the user.

Claims (4)

delete Fitting pins; A yoke in which a fitting hole into which the fitting pin is fitted is formed; A magnet having a communication hole through which the fitting pin passes; A plate in which a fitting hole into which the fitting pin is fitted is formed; A voice coil which vibrates by generating a magnetic field that interferes with a magnetic field generated by the magnet by an input electrical signal; And It includes; a vibration plate to vibrate together in accordance with the vibration of the voice coil to generate a sound pressure; From the specific point on the inner circumferential surface of the fitting hole, the communication hole and the fitting hole than the radius of the flat cross section of the fitting pin so that the sound pressure of the diaphragm can communicate with the outside of the bottom side of the yoke through the peripheral portion of the fitting pin The distance to the center of the cross section of the fitting pin is longer, And a distance from the other point on the inner circumferential surface of the fitting hole to the center on the flat cross section of the fitting pin is shorter than the radius of the flat cross section of the fitting pin. The method of claim 2, The fitting hole formed in the plate is characterized in that the square. A fitting pin fixing step of inserting a fitting pin into a curved fitting hole formed in the yoke to bend the protrusion projecting inwardly of the fitting hole in an upward direction; A magnet fixing step of fixing the curved protrusion by inserting the bent protrusion into a communication hole formed in a magnet; A plate fixing step of inserting an upper side of the fitting pin into a fitting hole formed in the plate; And And a diaphragm fixing step of fixing the diaphragm to which the voice coil is fixed to the outer circumferential surface of the yoke.

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