KR100372939B1 - 2 channel integration and thin type speaker - Google Patents

Abstract

A two-channel integrated thin speaker sharing a yoke is disclosed. In the two-channel integrated thin speaker, the first speaker is installed at the central side of one yoke inner surface, and the second speaker is installed at the side of the outer edge of one yoke, so that the thickness is significantly reduced compared to a conventional two channel speaker installed on the same axis. do. In addition, since the performance of the magnetic circuit is improved by the interaction of the magnet of the external magnetic circuit and the magnet of the magnetic magnetic circuit, the performance of the speaker is improved.

Description

2-channel integrated thin speaker {2 CHANNEL INTEGRATION AND THIN TYPE SPEAKER}

The present invention relates to a two-channel integrated thin speaker that shares a yoke.

A configuration and a manufacturing method of a conventional two-channel speaker will be described with reference to FIG. 1. 1 is a cross-sectional view showing a schematic configuration of a conventional two-channel speaker.

As shown, the first speaker 10 is provided. The first speaker 10 is coupled to the first yoke 12 in the form of closing the open side of the first yoke 12 and the first yoke 12 having a plurality of open surfaces and having a predetermined circular space. Has a first diaphragm 17. Inside the first yoke 12, a first pole piece 14 made of metal mounted on the first magnet 13 and the first magnet 13 is provided, and the first yoke 12 and the magnet are provided. The first voice coil 15 is installed on the first diaphragm 17 so as to be positioned between the thirteenth ones. Then, the first terminal plate 18 connected to the first voice coil 15 is coupled to the first yoke 12 so as to be exposed to the outside.

A second speaker 20 having a different size and the same configuration as that of the first speaker 10 is provided, and a rear surface of the first yoke 12 of the first speaker 10 and a second of the second speaker 20 are provided. The back of the yoke 22 is joined together to form a two channel speaker that is driven in both directions. Reference numeral 19 is a cover.

When the first speaker 10 is installed to face the outside of the mobile communication terminal, and the second speaker 20 having a large size is installed toward the inside of the mobile communication terminal, the first speaker 10 serves as a low power receiver or receiver. The second speaker 20 is to function as a speaker.

In the conventional two-channel speaker configured as described above, since the first speaker 10 having the predetermined thickness t1 and the second speaker 20 having the predetermined thickness t2 have a form in which they are coupled to the same axis, the overall thickness (t) has the disadvantage of thickening. That is, there is a disadvantage that the acoustic performance does not change, and only the thickness t becomes thick.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a two-channel integrated thin speaker that can improve the sound performance and at the same time can be reduced in weight and thickness of the product is thin. Is in.

1 is a cross-sectional view showing a schematic configuration of a conventional two-channel speaker.

Figure 2 is a cross-sectional view showing a schematic configuration of a two-channel integrated thin speaker according to an embodiment of the present invention.

3A is an enlarged view of the first speaker side of FIG. 2;

3B is an enlarged view of the second speaker side in FIG.

4 is a diagram illustrating a magnetic flux distribution of a gap part in which first and second voice coils are positioned according to an embodiment of the present invention;

FIG. 5 is a graph comparing the magnetic flux density of the gap portion of FIG. 4 with the magnetic flux density of the gap portion of a conventional external magnetic circuit. FIG.

* Description of the symbols for the main parts of the drawings *

110: yoke 120,130: first and second speakers

121,137: 1,2 magnet 123: pole piece

125,134: first and second diaphragm 127,135: first and second voice coil

129,138: 1,2 terminal block 131: frame

A two-channel integrated thin speaker according to the present invention for achieving the above object, in the two-channel speaker installed in the main body of the mobile communication terminal, the standing wall and the standing wall extending from the edge of the support plate and the support plate and the standing A yoke of metal having a frame-shaped outer plate which is bent at an end of the wall to the outside of the standing wall and extends; One surface is attached to the first diaphragm and the support plate coupled to the outer plate in a form covering an inner surface of the yoke, and an outer circumferential surface of the first magnet having a predetermined distance from the standing wall and the pole piece attached to the other surface of the first magnet. And one side is installed on the diaphragm and the other side is installed on the first voice coil and the yoke portion outside the first diaphragm positioned at an interval between the outer circumferential surface of the first magnet and the outer circumferential surface of the pole piece and the standing wall. A first speaker including a first terminal plate and the yoke for transmitting a power of the first voice coil to the first voice coil; One surface is attached to the outer surface of the outer plate of the yoke, the inner circumferential surface is attached to the ring-shaped second magnet and the other surface of the second magnet having a predetermined distance from the outer surface of the support plate and the center portion is opened so that the support plate of the yoke is located A second diaphragm coupled to an inner edge of the frame in a form covering the frame and the frame, and one side of which is installed on the second diaphragm, and the other side of which is located between the inner circumferential surface of the second magnet and the outer surface of the support plate of the yoke. And a second terminal plate installed on the frame outside the voice coil and the second diaphragm to transmit external power to the second voice coil, and a second speaker including the yoke.

Hereinafter, a two-channel integrated thin speaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view illustrating a schematic configuration of a two-channel integrated thin speaker according to an embodiment of the present invention, FIG. 3A is an enlarged view of the first speaker side of FIG. 2, and FIG. 3B is a side view of the second speaker side of FIG. 2. It is an enlarged view.

The speaker 100 according to the present exemplary embodiment is installed inside a main body of a device such as a mobile communication terminal or a hands-free device. As shown in the drawing, the first speaker 120 and the second speaker 130 are made thin in order to reduce thickness. Are installed while sharing the same yoke 110.

First, when the metal yoke 110 is described, the yoke 110 is a standing wall at the end of the standing wall 113 and the standing wall 113 which are bent and extended from the edge portions of the supporting plate 111 and the supporting plate 111. It has a frame-shaped outer plate 115 extending out of 113. At this time, the supporting plate 111 and the outer plate 115 is preferably formed to be parallel.

The first speaker 120 is installed on the space 117 side formed by the support plate 111 and the standing wall 113, and the second speaker 130 is installed on the other side of the space 117.

The first speaker 120 will be described with reference to FIGS. 2 and 3A. The first magnet 121 is installed in the space 117 formed by the support plate 111 and the standing wall 113 of the yoke 110, that is, the inner surface of the support plate 111. More specifically, one surface of the first magnet 121 is attached to the support plate 111 and the outer circumferential surface has a predetermined distance from the standing wall 113. The other side of the first magnet 121 is provided with a pole piece (123) of metal. In addition, the first diaphragm 125 is coupled to the outer plate 115 so as to cover the space 117, and one side of the first voice coil 127 is coupled to the first diaphragm 125. In this case, the other side of the first voice coil 127 is positioned between the outer circumferential surface of the first magnet 121 and the pole piece 123 and the standing wall 113. In addition, a first terminal plate 129 connected to the first voice coil 127 to transfer external power to the first voice coil 127 is provided at a portion of the outer plate 115 outside the first diaphragm 125. .

In summary, the first speaker 120 may include a first magnet 121, a pole piece 123, a first diaphragm 125, a first voice coil 127, a first terminal plate 129, and a yoke 110. It is composed. Referring to the principle that the sound is output from the first speaker 120, when the external power is transmitted to the first voice coil 127 through the first terminal plate 129, an electric field is generated, the yoke 110 and the first magnet Magnetic force is formed between the 121. The electromagnetic force is generated by the interaction of the magnetic field and the electric field formed by the input acoustic electric signal to vibrate the first diaphragm 125, thereby outputting sound.

The second speaker 130 will be described with reference to FIGS. 2 and 3B. A metal frame 131 is provided. The frame 131 has a central plate 131a having a predetermined size of an opening 132a formed in a central portion thereof, and a plurality of end surfaces 131b which are bent and extended from an edge portion of the central plate 131a. The supporting plate 111 of the yoke 110 is positioned inside the opening 132a, and the inner circumferential surface of the opening 132a and the outer circumferential surface of the supporting plate 111 have a predetermined interval. In addition, a predetermined space 132b is formed in the frame 131 by the middle plate 131a and the end surface 131b.

The second diaphragm 134 is coupled to the inner surface of the end surface 131b of the frame 131 to cover the space 132b of the frame 131. One side of the second voice coil 135 is coupled to the second diaphragm 134, and the other side of the second voice coil 135 is positioned between the outer surface of the support plate 111 and the inner circumferential surface of the opening 132a. One surface and the other surface of the ring-shaped second magnet 137 are attached to the outer surface of the outer plate 115 and the outer surface of the center plate 131a, respectively. That is, the supporting plate 111 and the standing wall 113 are positioned inside the second magnet 137, and the other side of the second voice coil 135 is the outer circumferential surface of the supporting plate 111 and the inner circumferential surface of the second magnet 137. Is located between. In addition, a second terminal plate 138 is provided at a portion of the central plate 131a outside the second diaphragm 134 to transmit external power to the second voice coil 135.

In summary, the second speaker 130 includes a frame 131, a second diaphragm 134, a second voice coil 135, a second magnet 137, a second terminal plate 138, and a yoke 110. do. The driving principle of the second speaker 130 is the same as the driving principle of the first speaker 120.

As described above, since the first speaker 120 and the second speaker 130 share the yoke 110, respectively, the first speaker 120 and the second speaker 130 are installed on both sides of the yoke 110. The first magnet 121, the pole piece 123, and the yoke 110, which are installed inside the yoke 110, are collectively referred to as a magnetic magnetic circuit, and the frame 131, which is formed outside the yoke 110. The two magnets 137 and the yoke 110 are collectively referred to as an external magnetic circuit.

As described above, in the present embodiment, the magnetic magnetic circuit and the magnetic magnetic circuit share the yoke 110. In this case, the performance of the magnetic circuit is improved by the interaction of the first magnet 121 and the second magnet 137, which will be described with reference to FIGS. 4 and 5.

FIG. 4 is a diagram illustrating magnetic flux distributions of a gap part in which first and second voice coils are located, and FIG. 5 is a magnetic flux density of the gap part of FIG. 4 and a gap part of a conventional magnetic magnetic circuit. A graph comparing magnetic flux density.

As shown, the magnetic flux densities of the gap portions P and Q according to the present embodiment are measured by going from the A and B points of the frame 131 to the yoke 110 as a starting point, and the magnetic flux density ranges from 0.66 to 0.91 Tesla. By the way, the magnetic flux density of the gap part of the conventional speaker which has only an external magnetic circuit is 0.58-0.79 Tesla. This shows that the magnetic flux density of the gap portion of the speaker according to the present embodiment is improved by about 15% or more compared with the conventional, and the performance of the speaker is remarkably superior to the conventional speaker.

Since the installation direction of the first speaker 120 and the second speaker 130 is opposite, the two-channel integrated thin speaker 100 is driven in both directions. In addition, when the sizes of the first speaker 120 and the second speaker 130 are appropriately different from each other and installed and used in a mobile communication terminal or a hands-free device, either one may be used as a speaker and the other may be used as a receiver. .

As described above, in the two-channel integrated thin speaker according to the present invention, since the first speaker is installed at one center of the inner surface of one yoke and the second speaker is installed at the edge of one outer surface of the yoke, the conventional speaker installed on the same axis is provided. The thickness is significantly reduced compared to the channel speaker.

In addition, since the performance of the magnetic circuit is improved by the interaction of the magnet of the external magnetic circuit and the magnet of the magnetic magnetic circuit, the performance of the speaker is improved.

In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (2)

In the two-channel speaker provided inside the main body of the mobile communication terminal, A standing wall 113 bent at an edge of the supporting plate 111 and an edge of the supporting plate 111 and an outer side of the te shape which is bent to the outside of the standing wall 113 at an end of the standing wall 113. A metal yoke 110 having a plate 115; One surface is attached to the first diaphragm 125 and the support plate 111 coupled to the outer plate 115 to cover the inner surface of the yoke 110, and an outer circumferential surface thereof has a predetermined distance from the standing wall 113. The first magnet 121 and the pole piece 123 attached to the other surface of the first magnet 121 and one side are installed on the diaphragm 125 and the other side is an outer circumferential surface of the first magnet 121 and the pole piece. A first voice coil 127 positioned at an interval between the outer circumferential surface of the 123 and the standing wall 113 and the yoke 110 outside the first diaphragm 125 to provide an external power source. A first speaker 120 including a first terminal plate 129 and a yoke 110 for transmitting to a first voice coil 127; One surface is attached to the outer surface of the outer plate 115 of the yoke 120 and the inner circumferential surface of the ring-shaped second magnet 137 and the second magnet 137 having a predetermined distance from the outer surface of the support plate 111. A second diaphragm attached to the other surface and coupled to the inner edge of the frame 131 in such a form as to cover the frame 131 on which the support plate 111 of the yoke is positioned and the center portion 132a is opened. The second voice coil and the second side of the second voice plate 134 and one side are installed on the second diaphragm 134 and the other side is located between the inner circumferential surface of the second magnet 137 and the outer surface of the support plate 111 of the yoke 110. 2 The second speaker 130 installed on the frame 131 outside the diaphragm 134 and including a second terminal plate 138 and the yoke 110 to transfer external power to the second voice coil 137. 2-channel integrated thin speaker comprising: a. The method of claim 1, The frame 131 is bent from the edge of the center plate 131a and the center plate 131a having the opening 132a having a predetermined size in which the support plate 111 is positioned, and the second diaphragm 134. A two-channel integrated thin speaker, which has a plurality of end faces 131b to be installed.