KR100672366B1 - Double-base speaker - Google Patents

Abstract

The present invention provides a speaker capable of outputting sound in both directions through a diaphragm located on both sides while sharing a bobbin with a single pole piece, the integrated bobbin is located in the center portion of the speaker body; First and second voice coils spaced apart from the outside of the bobbin; First and second permanent magnets in which the first and second voice coils are arranged symmetrically with the bobbin wound therebetween; A pole piece positioned inside the bobbin to attract the magnetic fields generated from the first and second permanent magnets in the first and second voice coil directions; First and second cross supports supported at both ends of the pole piece to fix the pole piece in the bobbin; A first diaphragm disposed at one end of the bobbin to vibrate by a force generated by the first voice coil and the first permanent magnet to generate sound; And a second diaphragm disposed at one end of the bobbin and symmetrically disposed on an opposite side of the first diaphragm to vibrate by a force generated by the second voice coil and the second permanent magnet.

Bidirectional, Speaker, Pole Piece, Bobbin

Description

Two-way speaker {Double-base speaker}

1 is a cross-sectional view of a conventional unidirectional speaker.

2 is a cross-sectional view of a two-way speaker according to an embodiment of the present invention.

3 is a perspective view of the bobbin in FIG. 2;

4 is a front view of the first and second cross supports in FIG.

FIG. 5 is a view illustrating a connection state of the pole piece and the first and second cross supports in FIG. 2; FIG.

Explanation of symbols on the main parts of the drawings

210: bobbin 220: pole piece

230-1, 230-2: first and second voice coils

240-1, 240-2: first and second permanent magnets

250-1, 250-2: first and second diaphragms

260-1, 260-2: first and second cross supports

270-1, 270-2: first and second frames

280-1, 280-2: first and second dampers

2901-1, 290-2: first and second edges

The present invention relates to a bidirectional speaker, and more particularly, to a speaker capable of outputting sound in both directions through a diaphragm located at both sides while sharing a single pole piece and bobbin.

The speaker converts electrical energy into mechanical energy by a voice coil existing between the pores, according to Fleming's left-handed law, that a current-carrying conductor is forced when it is in a magnetic field. That is, when a current signal including several frequencies is applied to a voice coil, the voice coil generates mechanical energy according to the strength of the current and the magnitude of the frequency, and vibrates the diaphragm attached to the voice coil. It generates a sound pressure of a predetermined magnitude that can be recognized by the human ear ultimately.

Various techniques for improving the performance of such a speaker have been proposed. For example, Patent Application No. 2002-0078764 has a heat sink to improve the heat dissipation effect on the outer circumference of the yoke surrounding the permanent magnet. A speaker is proposed so that heat generated can be quickly radiated to the atmosphere without being transferred to the speaker.

The configuration of the patent application having the technical features as described above will be described with reference to FIG. 1.

As shown in FIG. 1, the conventional unidirectional speaker includes a frame 101 having a through hole formed in a central portion thereof, a diaphragm 102 supported on an upper surface of the frame 101 to be shaken up and down, and a frame. The yoke 103 coupled to the through hole of the 101 and protruding to the bottom surface, the permanent magnet 104 fixed to the inside of the yoke 103, and the upper plate fixed to the upper surface of the permanent magnet 104 ( 105 and a voice coil 106 for vibrating the diaphragm 102 while linearly reciprocating up and down in accordance with the flow of the magnetic field provided between the outer diameter of the upper plate 105 and the inner diameter of the yoke 103, and the yoke. A heat sink 108 press-fits to the outer periphery of the 103 and a plurality of heat dissipation fins 107 are formed at the outer periphery to dissipate heat accumulated in the yoke 103, the voice coil 106 and the frame 101. Between the damper 109 to adjust the vibration while helping the vibration of the diaphragm 102, and voice The bobbin 110 is wound around the coil 106. Here, a pole piece (not shown) is formed in the bobbin 110.

The conventional speaker having the configuration as described above outputs sound in only one direction because one diaphragm is attached by the pole piece and the bobbin, so that the sound can be output in both directions in an electronic device such as a speaker box or a television receiver. At least two speakers are mounted when a speaker is to be installed. By mounting two speakers separately for two-way sound output, there is a problem in that a conventional speaker occupies a lot of space when mounted in an electronic device such as a box or a television receiver.

The present invention has been made to solve the above problems, an object of the present invention is to provide a speaker capable of outputting sound in both directions through the diaphragm located on each side while sharing a single pole piece and bobbin.

Another object of the present invention is to output a sound in both directions through two diaphragms sharing a single pole piece and bobbin, thereby reducing the occupied area of the space when mounted in an electronic device such as a speaker box or television receiver, etc. To provide.

Another object of the present invention is to reduce the area occupied in electronic devices such as a speaker box or a television receiver in which two diaphragms sharing a single pole piece and bobbin are mounted, thereby making the product slimmer. To provide.

According to an aspect of the present invention, there is provided a bidirectional speaker configured to receive a single electric signal and generate sound in both directions, including: an integrated bobbin positioned at a central portion of the speaker body; First and second voice coils spaced apart from the outside of the bobbin; First and second permanent magnets arranged symmetrically with the bobbin wound between the first and second voice coils; A pole piece positioned inside the bobbin to attract the magnetic fields generated from the first and second permanent magnets in the first and second voice coil directions; First and second cross supports supported at both ends of the pole piece to fix the pole piece to the inside of the bobbin; A first diaphragm disposed at one end of the bobbin in order to generate sound by vibrating by the force generated by the first voice coil and the first permanent magnet; And a second diaphragm disposed at one end of the bobbin and symmetrically disposed on an opposite side of the first diaphragm to generate sound by vibrating by the force generated by the second voice coil and the second permanent magnet. do.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 is a cross-sectional view of a two-way speaker according to an embodiment of the present invention.

Referring to FIG. 2, the bidirectional speaker of the present invention includes one bobbin 210 disposed at a center portion, one pole piece 220 formed inside the bobbin 210, and both sides of the bobbin 210. Symmetrically spaced apart first and second voice coils 230-1 and 230-2, and bobbin 210 wound around the first and second voice coils 230-1 and 230-2. And first and second permanent magnets 240-1 and 240-2 arranged in such a manner that the first and second diaphragms 250-1 and 250-2 are disposed symmetrically at both ends of the bobbin 210. do.

In addition, the bidirectional speaker of the present invention includes first and second cross supports 260-1 and 260-2 fixed to both ends of the pole piece 220, and first and second diaphragms 250-. First and second frames 270-1 and 270-2 disposed on the bottom surfaces of the first and second ends, respectively, and both side ends of the bobbin 210 and the first and second frames 270-1 and 270. First and second dampers 280-1 and 280-2 connected between the second and second dampers 280-1 and 280-2, respectively, and first and second edges formed at upper ends of the first and second diaphragms 250-1 and 250-2, respectively. (290-1, 290-2).

The bobbin 210 is formed in a cylindrical shape and is positioned at the center of the bidirectional speaker, and both ends thereof are connected to the first and second diaphragms 250-1 and 250-2, and the first and second cross supports 260-1. As shown in FIG. 3, a plurality of cross grooves h1 are formed to extend through the 260-2 to the first and second diaphragms 250-1 and 250-2. As shown in the figure, four cross grooves h1 are formed symmetrically on both sides of the bobbin 210, and the first and second cross supports 260-1 and 260-2 are respectively formed inside the cross grooves h1. Since both portions of the bobbin 210 may be extended to the first and second diaphragms 250-1 and 250-2.

The pole piece 220 is made of a conductive material positioned inside the cylindrical bobbin 210 and has a property of attracting a magnetic field to attract magnetic fields generated from the first and second permanent magnets 240-1 and 240-2. The magnetic field generated from the first and second permanent magnets 240-1 and 240-2 is wound around the bobbin 210 without being dispersed to the periphery of the first and second voice coils 230-1. , To be concentrated in the direction of 230-2) to reinforce the force applied to the first and second diaphragms 250-1 and 250-2.

The first and second voice coils 230-1 and 230-2 are wound in directions opposite to each other in the gap between the integrated bobbin 210 and the first and second permanent magnets 240-1 and 240-2. And the first and second voice coils in the same magnetic flux formed in the first and second voice coils 230-1 and 230-2 through the first and second permanent magnets 240-1 and 240-2. When electric current is applied to the 230-1 and 230-2, the action of the electromagnetic force is made by the change of the electric field, and the first and second voice coils 230-1 and 230-2 are attracted or repulsed by the electromagnetic force. Is generated and shakes the first and second diaphragms 250-1 and 250-2 while moving up and down to generate voice and / or sound. Here, since the first and second permanent magnets 240-1 and 240-2 are wound in opposite directions, electromagnetic forces are generated in the same direction, so that the bobbin 210 is driven in the same direction. Sounds (voice and sound) generated in both directions in the first and second diaphragms 250-1 and 250-2 have the same sound pressure and opposite phase.

The first and second permanent magnets 240-1 and 240-2 are arranged symmetrically with an integral bobbin 210 wound therebetween and wound with the first and second voice coils 230-1 and 230-2. A magnetic field is generated to vibrate the first and second diaphragms 250-1 and 250-2.

The first and second diaphragms 250-1 and 250-2 have a concave shape and a cone paper shape in the inward direction, and the first and second diaphragms 250-1 and 250-2 are respectively formed through the first and second edges 290-1 and 290-2. Assembled in the second frame (270-1, 270-2) is supported so that it can be shaken up and down naturally. Here, the first and second edges 290-1 and 290-2 are made of a soft and elastic material because they perform a function of shaking the first and second diaphragms 250-1 and 250-2, respectively. Lose.

The first and second cross supports 260-1 and 260-2 support both ends of the pole piece 220 so that the pole piece 220 can be stably fixed inside the bobbin 210. This is for preventing the electromagnetic force from being unnecessarily weakened by the first and second cross supports 260-1 and 260-2. If the first and second cross supports 260-1 and 260-2 are implemented as conductors, the electromagnetic force is weakened by attracting magnetic fields generated from the first and second permanent magnets 240-1 and 240-2. In order to prevent such a problem, the present invention implements the first and second cross supports 260-1 and 260-2 as insulators.

As shown in FIG. 4, four protrusions 261 are formed in the first and second cross supports 260-1 and 260-2, respectively, and the protrusions 261 are bobbin 210. And to extend to the first and second diaphragms 250-1 and 250-2 without being disturbed by the second cross supports 260-1 and 260-2. That is, when assembling the bobbin 210 and the first and second cross supports 260-1 and 260-2, the protrusions 261 of the first and second cross supports 260-1 and 260-2 are respectively The bobbin 210 is positioned to correspond to the cross groove h1 that is formed on both sides of the bobbin 210. Accordingly, when the bobbin 210 is moved in the directions of the first and second cross supports 260-1 and 260-2 due to the vibration, the protrusions 261 are inserted into the cross groove h1, thereby causing the bobbin ( 210 may extend to the first and second diaphragms 250-1 and 250-2 beyond the positions of the first and second cross supports 260-1 and 260-2.

As described above, the first and second cross supports 260-1 and 260-2 support both ends of the pole piece 220, as shown in FIG. 5, so that the first and second cross supports 260-1 and 260-2 are positioned in the bobbin 210 in the form of floating in the air. The pole piece 220 is to be stably fixed. Here, the pole piece 220 and the first and second cross supports 260-1 and 260-2 may be connected by an adhesive or may be connected through a mechanical connection method using a screw or the like.

The first and second frames 270-1 and 270-2 are attached to and support the lower ends of the first and second diaphragms 250-1 and 250-2, respectively. First and second dampers 280-1 and 280-2 are connected to each other between 270-1 and 270-2 and the first and second voice coils 230-1 and 230-2. The first and second dampers 280-1 and 280-2 control vibrations while helping to shake the first and second diaphragms 250-1 and 250-2.

As described above, in the present invention, the first and second permanent magnets 240-1 and 240-2 are disposed with the integral bobbin 210 and the pole piece 220 interposed therebetween, and the first and second diaphragms 250 are provided. -1, 250-2 are positioned to implement a two-way speaker, that is, the pole piece 220 and the first and second permanent magnets supported by the first and second frames 270-1 and 270-2. By generating the force by driving the bobbin 210, the electromagnetic force formed by the bi-directional integrated, the force vibrates the first and second diaphragm 250-1, 250-2 to generate sound in both directions, The present invention can exert two speaker efficacy with one speaker.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention outputs sound in both directions through the diaphragms located on both sides while sharing a single pole piece and bobbin, thereby providing space when mounting a two-way speaker in an electronic device such as a speaker box or a television receiver. Can significantly reduce the occupied area, thereby improving the slimmer product.

Claims (7)

A bobbin, first and second voice coils wound outside the bobbin, first and second permanent magnets arranged with the bobbin interposed therebetween, and first and second diaphragms disposed at both ends of the bobbin. In the bidirectional speaker comprising a, A cylindrical pole piece positioned inside the bobbin to attract magnetic fields generated from the first and second permanent magnets in the first and second voice coil directions; And a first and a second cross support supported at both ends of the pole piece to fix the pole piece to the inside of the bobbin. The method of claim 1, The first and the second cross support is bidirectional speaker, characterized in that made of a non-conductor. The method of claim 1, Two-way speaker, characterized in that the plurality of protrusions are formed on the outside of the first and second cross support. The method of claim 3, wherein The bobbin bilateral speaker, characterized in that a plurality of cross grooves are formed for inserting the protrusions, respectively. The method of claim 1, And the first and second voice coils are wound in opposite directions. The method according to any one of claims 1 to 5, And the pole piece and the first and second cross supports are connected by an adhesive. The method according to any one of claims 1 to 5, And the pole piece and the first and second cross supports are connected by screws.

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