KR20040084363A - Speaker for generating both vibration and sound - Google Patents

Abstract

PURPOSE: A speaker having a vibration function and a sound output function is provided to increase intensity of vibration by installing a vibration coil at a center of an external magnet. CONSTITUTION: A frame(110) includes an open top side and an open bottom side. A lower cover(121,125) is coupled to the open bottom side of the frame. A couple of plate springs(160) are fixed to an inner side of the frame. A magnetic circuit(130) includes a yoke having an air gap, a magnet, and a plate. The magnet and the plate are coupled to the inside of the yoke. A vibration coil(140) includes a bobbin, a first wire, and a second wire in order to vibrate the magnetic circuit. A lower end of the vibration coil is supported by the lower cover. An upper end of the vibration coil penetrates the air gap, the plate, and the magnet. A vibration unit(150) includes a voice coil(153) for vibrating a vibration plate.

Description

Vibration and sound speaker {SPEAKER FOR GENERATING BOTH VIBRATION AND SOUND}

The present invention relates to a vibration and sound combined speaker.

In general, a portable terminal or a pager receives a call signal from a base station or the like to generate a vibration or ring tone to notify the user of an incoming signal. Conventional portable terminals or pagers are provided with a vibration generator and a sound generator for notifying the reception of a signal, respectively. Vibration generators include a vibration motor having an eccentrically attached rotary shaft, and sound generators include a speaker, a buzzer and a receiver.

However, a conventional portable terminal or a wireless pager provided separately from the vibration generating device and the sound generating device has a problem in that the weight of the device is increased due to the increase in the number of parts and the size of the whole device.

In order to solve this problem, a speaker for generating vibration and sound has been developed and used in a portable terminal or a wireless pager, which will be described with reference to FIG. 1. 1 is a cross-sectional view showing the configuration of a conventional speaker.

As shown, a frame 11 is provided. The inside of the frame 11 is provided with a magnetic circuit unit 20 for generating a vibration and a vibration unit 30 for generating a sound. The magnetic circuit part 20 has a ring-shaped external magnet 23 and a plate 25 which are sequentially joined to the yoke 21 and the edge portion of the yoke 21, and the vibrator 30 has a frame 10. The inner surface of the upper side has a diaphragm 31 and the voice coil 33 is installed on the diaphragm 31 is coupled. In addition, a ring-shaped leaf spring 13 for supporting the yoke 21 is provided on the lower side of the inner surface of the frame 10, and an outer magnetic shape is formed on the inner surface of the frame 10 between the leaf spring 13 and the diaphragm 31. The vibration coil 15 is installed to surround the magnet 23 and the plate 25. Reference numerals 17a and 17b are upper and lower covers.

The operation of the conventional speaker configured as described above will be described.

When a predetermined or more sound signal current is applied to the voice coil 33, the voice coil 33 vibrates up and down by an interaction between the magnetic field generated by the magnetic circuit unit 20 and the electric field generated by the voice coil 33. . Then, the vibration plate 31 vibrates by the voice coil 33 to generate sound.

When a vibration signal current of less than a predetermined value is applied to the vibration coil 15, the magnetic circuit unit 20 is vertically moved by the interaction between the magnetic field generated by the magnetic circuit unit 20 and the electric field generated by the vibration coil 15. To vibrate. Then, the vibration force of the magnetic circuit unit 20 is transmitted to the frame 10 through the leaf spring 13 to vibrate the portable terminal and the wireless pager.

However, the conventional speaker configured as described above is installed on the outside of the magnetic magnet 23 in the form that the vibration coil 15 surrounds the magnetic magnet 23. By the way, since the outer portion of the magnetic magnet 23 is a portion where the magnetic flux is bent, the direction in which the magnetic circuit portion 20 vibrates by the action of the upper surface side of the magnet 23 and the vibration coil 15 and the magnet 23. By virtue of the action of the lower surface side and the vibration coil 15, the direction in which the magnetic circuit unit 20 vibrates becomes the opposite direction, thereby reducing the vibration force. Due to this, the vibration of the magnetic circuit portion 20 vibrating by the action with the vibration coil 15 has a weak disadvantage.

The present invention has been created to solve the problems of the prior art as described above, an object of the present invention is to install a vibration coil in the center of the magnetic magnet is concentrated by the action of the upper surface side and the vibration coil of the magnet The present invention provides a speaker for both vibration and sound that can obtain a large vibration force by making the direction in which the magnetic circuit part vibrates and the direction in which the magnetic circuit part vibrates by the action of the vibration coil and the lower surface side of the magnet.

1 is a cross-sectional view showing the configuration of a conventional speaker.

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

Explanation of symbols on the main parts of the drawings

110 frame 130 magnetic circuit part

140: vibration coil 150: vibration unit

Combined vibration and sound speaker according to the present invention for achieving the above object, the upper and lower surfaces open the frame; A lower cover coupled to the bottom surface of the frame; A pair of ring-shaped leaf springs fixed to an outer circumferential surface side with predetermined intervals up and down on an inner surface of the frame; The yoke is provided in a U shape and the upper and lower edge portions of the pair of leaf springs are supported on the inner circumferential surface of the pair of leaf springs, and the lower surface of the yoke has a predetermined gap with the inner surface of the yoke. A magnetic circuit unit having a magnet and a plate sequentially coupled therein; The lower end is supported by the lower cover and the upper end side passes through the air gap, the magnet and the plate, and the bobbin and the plate having a predetermined distance from the surface of the yoke and the inner surface of the magnet and the plate forming the air gap. The first and second wires are wound on the inner surface of the bobbin and the outer surface of the bobbin, which face the yoke forming the air gap, respectively. A vibration coil for vibrating the magnetic circuit unit; The diaphragm and the upper end coupled to the upper surface of the inner surface of the frame are coupled to the diaphragm, and the lower end is positioned between the yoke and the plate to vibrate the diaphragm while vibrating by the action of the magnetic circuit part when a predetermined or more sound signal current is applied. It is provided with a vibration unit having a voice coil to make.

Hereinafter, with reference to the accompanying drawings will be described in detail a vibration and sound combined speaker according to an embodiment of the present invention.

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

As shown, the speaker 100 according to the present embodiment has a cylindrical frame 110 of which the upper and lower surfaces are open. The upper and lower covers 121 and 125 are coupled to the upper and lower surfaces of the frame 110, and the magnetic circuit unit 130, the vibration coil 140, and the vibration unit 150 are installed therein. In addition, a pair of ring-shaped leaf springs 160 having an outer circumferential surface side fixed to the inner surface of the frame 110 while having a predetermined interval up and down are installed inside the frame 110.

The magnetic circuit unit 130 is provided in a U shape and has a predetermined distance from the inner surface of the yoke 131 and the yoke 131 that are supported by the edge portions of the upper and lower surfaces on the inner circumferential surface side of the pair of leaf springs 160, respectively. 131 has a ring-shaped external magnet 133 and a plate 135 are sequentially coupled to the inside. An air gap 131a is formed on the bottom of the yoke 131, and the air gap 131a is formed in a hole shape to correspond to the internal spaces of the magnet 133 and the plate 135. The magnetic circuit unit 130 is supported by the leaf spring 160 to generate a vibration force while vibrating by the action with the vibration coil 140, and to vibrate the vibration unit 150 by the action with the vibration unit 150 Generates a signal, which will be described later.

The vibration coil 140 has a bobbin 141 and a wire 143. The lower end of the bobbin 141 is supported by the lower cover 125, and the upper end side penetrates through the air gap 131a of the yoke 131, the magnet 133, and the plate 135. At this time, the outer surface of the bobbin 141 has a predetermined distance from the surface of the yoke 131 forming the air gap 131a and the inner surface of the magnet 133 and the plate 135. The wire 143 is wound around the inner surface of the plate 135 and the portion of the bobbin 141 facing the surface of the yoke 131 forming the air gap 131a. Thus, when a predetermined vibration signal current is applied to the vibration coil 140, the magnetic circuit unit 130 is vibrated by the action of the vibration coil 140 and the magnetic circuit unit 130. Then, the vibration of the magnetic circuit unit 130 is transmitted to the frame 110 through the leaf spring 160 to generate a vibration signal.

The first wire 143a wound on the portion of the bobbin 141 facing the inner surface of the plate 135 and the portion of the bobbin 141 facing the surface of the yoke 131 forming the air gap 131a. The second wires 143b may or may not be connected to each other. When the first and second wires 143a and 143b are connected, the first and second wires 143a and 143b should be wound in opposite directions, and the first and second wires 143a and 143b may be wound in opposite directions. The vibration direction of the magnetic circuit unit 130 and the vibration direction of the magnetic circuit unit 130 by the action of the second wire 143b and the magnetic circuit unit 130 are the same. When the first and second wires 143a and 143b are not connected, when the directions of currents applied to the first and second wires 143a and 143b are reversed, the first wire 143a and the magnetic circuit part 130 are reversed. The vibration direction of the magnetic circuit unit 130 by the action of the same as the vibration direction of the magnetic circuit unit 130 by the action of the second wire 143b and the magnetic circuit unit 130 is the same.

Since the vibration coil 140 according to the present exemplary embodiment is installed at the center portion of the magnet 133, which is a portion where the magnetic flux is concentrated, the vibration of the magnetic circuit unit 130 is increased.

The vibrator 150 has a diaphragm 151 and a voice coil 153. The diaphragm 151 is coupled to an upper side of the inner surface of the frame 110. The upper end side of the voice coil 153 is coupled to the diaphragm 151 and the lower end side is positioned between the yoke 131 and the plate 135. Thus, when a predetermined or more sound signal current is applied to the voice coil 153, the voice coil 153 vibrates by the action of the magnetic circuit unit 130. Then, the vibration plate 151 is vibrated by the voice coil 153 to generate an acoustic signal.

As described above, in the vibration and sound combined speaker according to the present invention, since the vibration coil is installed at the center of the magnetically focused magnetic magnet, the magnetic circuit part vibrates by the action of the upper surface side of the magnet and the vibration coil. And the direction in which the magnetic circuit part vibrates by the action of the lower surface side of the magnet and the vibration coil are the same. As a result, the vibration of the magnetic circuit portion vibrating by the action with the vibration coil is increased, so that the vibration signal of the speaker is increased.

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)

A frame having an open top and bottom surfaces; A lower cover coupled to the bottom surface of the frame; A pair of ring-shaped leaf springs fixed to an outer circumferential surface side with predetermined intervals up and down on an inner surface of the frame; The yoke is provided in a U shape and is supported on the inner circumferential surface side of the pair of leaf springs with the upper and lower edges of the yoke having an air gap (Ari Gab) formed thereon, and having a predetermined distance from the inner surface of the yoke. A magnetic circuit unit having a magnet and a plate sequentially coupled therein; The lower end is supported by the lower cover and the upper end side passes through the air gap, the magnet and the plate, and the bobbin and the plate having a predetermined distance from the surface of the yoke and the inner surface of the magnet and the plate forming the air gap. The first and second wires are wound on the inner surface of the bobbin and the outer surface of the bobbin, which face the yoke forming the air gap, respectively. A vibration coil for vibrating the magnetic circuit unit; The diaphragm and the upper end coupled to the upper surface of the inner surface of the frame are coupled to the diaphragm, and the lower end is positioned between the yoke and the plate to vibrate the diaphragm while vibrating by the action of the magnetic circuit part when a predetermined or more sound signal current is applied. Combined vibration and sound speaker comprising a vibration unit having a voice coil to make. The method of claim 1, And said first and second wires are interconnected and wound in opposite directions.