KR20020021869A - 2 channel integration and thin type speaker having function of vibration - Google Patents

Abstract

PURPOSE: A two-channel thin film type speaker with a vibration function is provided to reduce fabrication costs by forming a speaker of a thin film type having the vibration function. CONSTITUTION: A frame(110) has a center plate including a predetermined opening portion and a multitude of section bent on an edge portion of the center plate. A yoke(120) has a support plate located at the opening portion, an erected wall extended from an edge portion of the support plate to an outside direction, and an outside plate extended from an end portion of the erected wall to an outside of the erected wall. A circular vibration plate(160) is combined with the sections to cover a space formed by the center plate and the sections. A panel type vibration plate(130) is fixed to a main body. The panel type vibration plate faces a space formed by the support plate and the erected wall. The first magnet(141) is connected with the outside plate and the center plate. The second magnet(151) is formed in the space of the yoke(120). The first voice coil(143) is combined with the circular vibration plate(160). The first voice coil(143) is located between the support plate and an inner circumference of the opening portion. The second voice coil is combined with the panel type vibration plate(130). The second voice coil(155) is located between the erected wall and the second magnet(151). A damper is fixed to the frame(110) and the panel type vibration plate(130). A pole piece(153) is connected with the second magnet(151). The first terminal plate(171) and the second terminal plate(175) are connected with the first and the second voice coils(143,153), respectively.

Description

2-channel integrated thin speaker with vibration function {2 CHANNEL INTEGRATION AND THIN TYPE SPEAKER HAVING FUNCTION OF VIBRATION}

The present invention relates to a two-channel integrated thin speaker having a vibration function for sharing the 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.

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.

The conventional two-channel speaker configured as described above has the overall thickness since the first speaker 10 having the predetermined thickness t1 and the second speaker 20 having the predetermined thickness t2 are coupled to the same axis. (t) has the disadvantage of thickening.

In addition, in order to impart a vibration function to the mobile communication terminal, a motor having an eccentric shaft must be separately installed, which increases the cost.

The present invention was created in order to solve the above problems, the object of the present invention is to implement a light weight and thinning of the product to be thin, and at the same time, vibration function that can reduce the cost by the function of vibration In providing a two-channel integrated thin speaker having a.

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 magnetic magnetic circuit part side of FIG. 2;

3B is an enlarged view of the magnetic magnetic circuit part side of FIG. 2;

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;

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

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

110: frame 120: yoke

130: panel type vibration plate 140: magnetic magnetic circuit

150: magnetic magnetic circuit 160: circular vibration plate

In the two-channel integrated thin speaker having a vibration function 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,

A frame having an opening having a predetermined size, and a frame having a plurality of cross-sections bent and extended from an edge portion of the center plate, a support plate positioned in the opening portion, and an outer side of the frame at the edge portion of the support plate. The cross-section in the form of covering a space formed by the yoke having a standing wall which is bent in an extended direction, a rim-shaped outer plate extending from the end of the standing wall to the outside of the standing wall, and the center plate and a cross section; A circular vibrating plate coupled to the panel, a panel-type vibrating plate fixed to the main body so as to face a space formed by the support plate and the standing wall, a first magnet coupled to the outer side and the other side coupled to the center plate; The second magnet provided in the space of the yoke, one end side is coupled to the circular vibrating plate and the other end side is between the base plate and the inner peripheral surface of the opening The first voice coil and one end side of which are engaged are coupled to the panel type vibration plate so that one side of the damper is coupled and the other end side is a second voice coil positioned between the standing wall and the second magnet, and one side is fixed to the frame. And a damper fixed to the panel type vibration plate, a pole piece coupled to the second magnet, a first terminal plate provided at one side and the other side of the frame and connected to the first voice coil and the second voice coil, respectively. A second terminal plate is provided.

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

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

Speaker 100 according to the present embodiment is installed inside the main body of the device, such as a mobile terminal or hands-free, as shown, in order to reduce the thickness of the magnetic magnetic circuit 140 and the magnetic magnetic circuit ( 150 is installed while sharing the same yoke 120.

Referring to the metal yoke 120, the yoke 120 is a standing wall 123 at the end of the standing wall 123 and the standing wall 123 which are bent and extended at the edges of the supporting plate 121 and the supporting plate 121. It has a frame-shaped outer plate 125 extending outward. At this time, the support plate 121 and the outer plate 125 is preferably formed to be parallel. When the yoke 120 is installed in the frame 110 to be described later, the outer plate 125 is installed to face the outside of the frame 110.

The magnetic magnetic circuit unit 140 will be described with reference to FIGS. 2 and 3A. The frame 110 of the metal material on which the yoke 120 is installed has a plurality of cross-sections which are bent and extended from the edge of the center plate 111 and the center plate 111 having the opening 111a of a predetermined size ( 113). The supporting plate 121 of the yoke 120 is positioned inside the opening 111a, and the inner circumferential surface of the opening 111a and the outer circumferential surface of the supporting plate 121 are spaced apart from each other by a predetermined distance. In addition, a predetermined space 115 is formed in the frame 110 by the middle plate 111 and the end face 113.

The circular vibrating plate 160 is coupled to the end face 113 of the frame 110 to cover the space 115 of the frame 110, and the magnetic domain is formed on the frame 110, the yoke 120, and the circular vibrating plate 160. The magnetic circuit 140 side is provided. That is, one side is coupled to the outer surface of the outer plate 125 and the other side is provided with a first magnet 141 coupled to the outer surface of the center plate 111, one end side is coupled to the circular vibration plate 160 and the other end side The first voice coil 143 positioned between the base plate 121 and the inner circumferential surface of the opening 111a is installed. In addition, a first terminal plate 171 that receives external power is provided at one side of an outer surface of the frame 110 to be connected to the first voice coil 143.

That is, the configuration including the metal frame 110, the metal yoke 120, and the first magnet 141 is called an external magnetic circuit 140. Referring to the principle that the sound is output from the magnetic magnetic circuit 140, when the external power is transmitted to the first voice coil 143 through the first terminal 171, an electric field is generated, yoke 120 and Magnetic force is formed between one magnet 141. 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 circular vibrating plate 160, and thus the sound is output.

Next, the magnetic magnetic circuit unit 150 side will be described with reference to FIGS. 2 and 3B.

The panel type vibration plate 130 fixed to the main body is provided, and the panel type vibration plate 130 is installed to face the space 127 formed by the support plate 121 and the standing wall 123 of the yoke 120. .

The yoke 120 and the panel type vibration plate 130 are provided with a magnetic magnetic circuit 150 side. That is, two magnets 151 are provided on the inner surface of the support plate 121 forming the space 127, and a metal pole piece 153 is provided on the second magnet 151. Then, one end side is coupled to the panel type vibration plate 130 and the other end side is provided with a second voice coil 155 is located between the standing wall 123 and the second magnet 151. In addition, a second terminal plate 175 (see FIG. 3A) connected to the second voice coil 155 is provided on the other side of the outer surface of the frame 110, one side is fixed to the second voice coil 155, and the other side is a panel. The damper 180 is fixed to the mold vibration plate 130 and supports the horizontal of the frame 110.

That is, the magnetic magnetic circuit 150 includes a yoke 120, a second magnet 151, and a pole piece 153 made of metal. The sound output of the magnetic magnetic circuit 150 is the same as the sound output principle of the magnetic magnetic circuit 140 described above. Referring to the vibration generating principle of the magnetic magnetic circuit 150, the frame 110, the yoke 120 and the magnetic magnetic circuit 140 coupled with the magnetic magnetic circuit 150 has a predetermined weight or more and thus resonates. Frequency is formed in the low frequency range between 100 and 300 Hz. However, since the panel type vibration plate 130 is fixed to the main body and the sound regeneration efficiency due to the vibration of the magnetic magnetic circuit 150 in the low frequency region is reduced, as a result of the vibration of the second voice coil 155 The frame 110, the yoke 120, and the magnetic magnetic circuit 140 vibrate to generate a vibration force.

In this case, the main body of the mobile communication terminal may be a panel type vibration plate 130. In this case, the second voice coil 155 is installed in the main body.

As described above, since the magnetic magnetic circuit 140 and the magnetic magnetic circuit 150 are installed on both sides of the yoke 120 to share the yoke 120, the overall thickness becomes thin.

As described above, in the present embodiment, the magnetic domain 140 and the magnetic magnetic circuit 150 share the yoke 120. In this case, the performance of the magnetic circuit is improved by the interaction of the first magnet 141 and the second magnet 151, which will be described with reference to FIGS. 4 and 5.

FIG. 4 is a view illustrating magnetic flux distributions of a gap portion in which first and second voice coils are positioned, and FIG. 5 compares the magnetic flux density of the gap portion of FIG. 4 with the magnetic flux density of a conventional gap portion. It is a graph.

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 110 toward the yoke 120 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.

The two-channel integrated thin speaker 100 having a vibration function according to the present embodiment has an installation direction of the external magnetic magnetic circuit 140 and the circular vibration plate 160 and the magnetic magnetic circuit 150 and the panel type vibration plate 130. The installation direction is reversed. Therefore, it is driven in both directions.

In addition, the sizes of the magnetic magnetic circuit 140 and the circular vibrating plate 160 and the magnetic magnetic circuit 150 and the panel-type vibrating plate 130 are appropriately different from each other to be installed and used in a mobile communication terminal or hands-free. In other words, one may be used as a speaker and the other may be used as a receiver.

As described above, the two-channel integrated thin speaker having a vibration function according to the present invention is significantly thicker than the conventional two-channel speaker installed on the same axis by sharing the yoke between the magnetic magnetic circuit and the magnetic magnetic circuit. Is reduced.

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.

Further, since the panel type vibration plate provided on the magnetic magnetic circuit part side is fixed to the main body, it can be used as an incoming vibration signal in the low frequency region. Therefore, there is no need for a separate device for vibration generation, and the cost is reduced.

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 frame having a plurality of end surfaces bent and extended from an edge of the center plate and a center plate having an opening of a predetermined size; A yoke having a support plate positioned in the opening, a standing wall bent from the edge of the support plate in an outward direction of the frame, and an outer plate of a frame shape extending outward from the standing wall at an end of the standing wall Wow, A circular vibrating plate coupled to the cross section in a form covering the space formed by the center plate and the cross section; A panel type vibration plate fixed to the main body to face the space formed by the support plate and the standing wall; One side is coupled to the outer plate and the other side is the first magnet coupled to the central plate and the second magnet provided in the space of the yoke, One end side is coupled to the circular vibrating plate and the other end side is coupled between the first voice coil and one end side positioned between the support plate and the inner circumferential surface of the opening, and the one end side is coupled to the panel type vibration plate so that one side of the damper is coupled and the other end side is the standing wall. A second voice coil positioned between the second magnet and One side is fixed to the frame and the other side is a damper fixed to the panel type vibration plate, A pole piece coupled to the second magnet, And a first terminal plate and a second terminal plate provided at one side and the other side of the frame and connected to the first voice coil and the second voice coil, respectively. The method of claim 1, The panel type vibration plate is the two-channel integrated thin speaker having a vibration function, characterized in that the main body.