KR19990041876A - Speaker using constructive interference - Google Patents

Abstract

The present invention relates to a speaker, comprising a traveling tube for advancing sound waves output from a speaker, a split traveling tube connected to the traveling tube, and a resonant tube connected to the split traveling tube, thereby causing a resonance phenomenon in the resonant tube. The present invention relates to a speaker using reinforced interference.

Speaker 100 that is equally applied to the signal output from the amplifier, one end portion of the hollow traveling tube 200, the diameter of the smaller than the diameter of the progress tube 200 is connected to the outer peripheral surface of the frame 110 of the speaker 100 A plurality of divided progress tubes 300 connected to each other, and the focusing connection with the other end of the divided progress tube 300 and at the same time the resonant tube 400 that is equal to the sum of the cross-sectional area of the divided progress tube 300 is provided After the sound wave derived from the speaker 100 passes through the traveling tube 200, the divided wave is divided into the same waveform in each of the divided traveling tubes 300 to generate a resonance phenomenon when joining the resonant tubes 400. By applying low current to the voice coil, high-frequency sound can be heard, miniaturizing the speaker, preventing forced electromagnetic deflection due to vibration or magnetic field of the voice coil, and reinforcing sound waves. Can cause interference Invention is capable of breaking a limit.

Description

Speaker using constructive interference

The present invention relates to a speaker device for converting electrical energy into an acoustic signal, comprising: a traveling tube for advancing sound waves output from a speaker; a split traveling tube connected to the traveling tube; and a resonating tube connected to the divided traveling tube; By inducing a resonance phenomenon in the resonator tube is possible to miniaturize the speaker, and relates to a speaker using the reinforcement interference to avoid the high-limit limit and microphoning phenomenon.

In general, with the recent development of the industrial society, advanced audio equipment is rapidly generalized, and many people are enjoying audio.

In addition, audio products that have been conceived and used only for listening to music now add the ability to record, edit and preserve the state closest to the original. Audio devices such as these have been luxury home appliances that have been used for the purpose of sound reproduction, and are now scattered around us as an important necessity that is indispensable in our real life.

Speakers that convert electrical signals to sound in such audio devices will not be overlooked as an important part of realizing audio devices.

Hereinafter, with reference to the accompanying Figure 1 will be described the structure of the most commonly used cone-shaped speaker and its operation will be described.

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

As shown in FIG. 1, the loudspeaker includes a vibrometer including a cone vibration plate 1, an edge 8, a voice coil 2, a damper 6, a center cap 7, and the like, a magnet 3, Magnetic circuit portion including center pole 5, yoke 13, frame 9 and the like, frame 9, gasket 10, terminal 11, surface supporting the magnetic circuit portion and vibrometer It consists of a main-body part containing the solid line 12 etc.

The frame 9 serves as a mother body for attaching a vibrometer and a magnetic circuit, and requires low resonance and high robustness.

The magnetic circuit installed in the lower part of the frame 9 acts to move the bobbin 14 by applying a direct current magnetic field to the bobbin 14 at right angles to the bobbin 14, which is called a field coil type. And let the current flow through it. The center pole 5, yoke 13 and plate 4 are magnetized by the magnet 3 to guide the magnetic flux from the magnet 3 to the gap (between bobbin and plate) without loss. For this purpose, the material, shape and cross-sectional area become important factors. The material is usually low carbon steel.

The voice coil 2 is wound around the bobbin 14, the hollow portion of the bobbin 14 inserts the center pole 5, and receives the electric input from the amplifier to operate the bobbin 14 up and down.

The damper 6 connecting the outer circumferential surface of the upper end of the bobbin 12 and the inner circumferential surface of the frame 9 is also called a center holder, and the voice coil 2 is moved at the center of the gap, and the plate 4 It prevents contact with the center pawl (5), and serves to ensure that the voice coil (2) and the cone vibration plate (1) is in the right position in the stopped state.

The center cap 7 installed along the inner circumferential surface of the neck portion of the cone vibrating plate 1 is attached to prevent dust from entering the center pole 5 as can be known by the dustproof cap. The reinforcement of the neck portion of the cone vibrating plate 1 or vibrates itself, so that there is radiation of sound from the cap, and the frequency characteristic varies depending on the material, shape, and size, and thus the sound quality changes.

The edge 8 connecting the upper circumferential surface of the cone vibration plate 1 and the upper circumferential surface of the frame 9 is for supporting the cone vibration plate 1 in the correct position. It should not affect the driving of 1).

These edges 8 are largely divided into two types, one of which is called a fixed edge, which forms the edge 8 at the same time when the cone vibration plate 1 is manufactured, and the other is formed separately. The cone vibration plate 1 is attached to (8), which is called a free edge.

At present, most products of the free edge are available, and there are various materials and shape processing methods depending on the purpose.

The gasket 10 connecting the edge 8 and the frame 9 has an edge 8 at the frame 9 to prevent the edge 8 from being easily removed by vibration of the cone oscillating plate 1. It is used to laminate lamination ball, rubber, cork, resin, etc. by fixing it closely.

By the above configuration, that is, the plate 3, the center pole 5 and the yoke 13 are magnetized by the magnet 3, and the direction of the magnetic flux is from the center pole 5 to the magnet 3 In a situation in which the plate 4 is installed in the upper end, the AC current signal output through the amplifier is conducted to the voice coil 2 through the terminal 11. Accordingly, the magnetic force is generated in the direction of the center cap 7 by Fleming's left hand law. Accordingly, the bobbin 14, on which the voice coil 2 is wound, moves upward, and the cone vibration plate 1 vibrates. That is, the degree of upward movement of the bobbin 14 varies according to the magnitude of the signal outputted from the amplifier (the magnitude of the current), and thus, the degree of vibration of the cone oscillation plate 1 also varies, so that different sound waves are generated.

According to the vibration of the cone vibrating plate 1, the air which is in contact with the cone vibrating plate 1 is moved, and the movement of the air is transmitted to the human ear as sound waves. The human ear perceives this sound wave as sound.

In order to express high-frequency sound in such a speaker, a method of increasing the current flowing through the voice coil, or increasing the magnetic flux density by increasing the magnet, or increasing the number of turns of the voice coil should be used.

However, when a large amount of current flows through the voice coil as described above, there is a limit of the amount of current due to heat generation inside the voice coil. Due to the magnetic field of the electrons, the electrons are deflected and a microphoning phenomenon occurs in which a horizontal line is drawn on the screen.

In addition, even when the above method is used, a high range limit exists due to deformation by a support system (mechanical limit) supporting the speaker. That is, the diaphragm of the speaker is not a perfect rigid body, and when the frequency is increased, the vibration is generated. First, the edge around the cone vibration plate resonates in the mid range, and if the frequency continues to increase, the damper near the portion where the cone vibration plate is attached and the neck portion of the gon vibration plate become effective, causing resonance. Above this resonance point, there exists a high threshold point at which sound waves are not generated. In addition, the vibration of the case, such as a television or radio also vibrates, the loss caused by accessories such as television or radio due to the vibration of the case is really great.

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is a traveling tube for advancing sound waves output from a speaker, a split traveling tube connected to the traveling tube, and a resonance connected to the divided traveling tube. It is possible to miniaturize the speaker by installing a tube to cause a resonance phenomenon in the resonant tube, and to provide a speaker using constructive interference that prevents high-band limiting and microphoning.

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

Figure 2 is a schematic diagram showing the configuration of a speaker according to the present invention.

Figure 3 is a waveform diagram for explaining the resonance phenomenon of the resonant tube of the present invention.

<Explanation of symbols for main parts of the drawings>

100: speaker 110: frame

112: diaphragm 114: coil

116: Bobbin 118: Center Pole

120: plate 122: magnet

200: Progression pipe 300: Division progression hall

400: resonant tube F: resonance point

A speaker using the constructive interference of the present invention for achieving the above object is a speaker comprising a vibration system, a magnetic circuit portion, and a main body portion for supporting the magnetic circuit portion and the vibration system, the speaker receiving the same signal output from the amplifier ; A hollow traveling tube having one end connected to a frame outer circumferential surface of the speaker; A plurality of divided progress tubes connected to a diameter smaller than the diameter of the progress tube; It is characterized in that the resonant tube which is connected to the other end of the split progress tube and at the same time as the sum of the cross-sectional area of the split progress tube.

According to the above configuration, after the sound wave derived from the speaker passes through the traveling tube, the split wave is divided into the same waveform in each of the dividing tubes so that the resonance occurs when the resonant tubes are joined to calculate the high range sound. You can do it.

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

2 to 3 are views showing an embodiment of the present invention, Figure 2 is a schematic diagram showing the configuration of a speaker according to the present invention, Figure 3 is for explaining the resonance phenomenon of the resonant tube of the present invention It is a waveform diagram.

As shown in FIG. 2, the present invention includes a speaker 100 that receives a signal from an amplifier and vibrates to form sound waves, a traveling pipe 200 connected to the speaker 100, and a traveling pipe 200. It is composed of a split progress tube 300 is connected, the resonator tube 400 is connected to the split progress tube (300).

The speaker 100 includes a voice coil 114 receiving a signal output from the main amplifier, a center pole 118, a magnet 122, a plate 120, and the like that supply magnetic flux to the voice coil 114. Magnetic circuit, the vibration circuit due to the magnetic circuit and the voice coil 114, 112 and the like.

The traveling tube 200 coupled to the outer circumferential surface of the frame 110 of the speaker 100 advances sound waves generated from the diaphragm 112 of the speaker 100 and transmits the sound waves to each of the divided progress tubes 300.

The division progress tube 300 is provided with a plurality of diameters smaller than the diameter of the traveling tube 200, divides the sound waves applied from the traveling tube 200 into a plurality of joining to one resonant tube 400. .

Here, the cross-sectional area of each of the divided pipes 300 is the same so that the sound waves passing through each of the divided pipes 300 are the same size (phase) to maximize the size of the constructive interference when combined in the resonant pipe 400 Obtain maximum efficiency.

One resonant tube 400 coupled to each of the divided progress tubes 300 is manufactured and combined with the same size as the sum of the cross-sectional areas of the divided progress tubes 300, and thus proceeds from each of the divided progress tubes 300. By combining the sound waves of the same phase to induce the reinforcement interference described below to induce a resonance phenomenon.

Here, the constructive interference will be described to help the understanding of the present invention.

The constructive interference means that when two waves are combined as shown in FIG. 3A, a wave having the same wavelength but twice the amplitude is obtained. If the ridges and valleys of two waves appear in the same position, the waves are said to be in phase. In other words, when two waves having the same phase are combined, one wave is reinforced with another wave and the amplitude of the wave is increased.

On the other hand, when the two waves where the floor meets the valleys are combined as shown in FIG. 3b, the two waves are out of phase with each other, causing an offset interference that completely destroys the waves, and the amplitude disappears.

That is, the wave pattern obtained from the same wave source separated by a certain distance will constructively interfere if the wave is in the same phase, and extinguish if the wave is out of phase.

Referring to the operation of the present invention by the configuration as described above are as follows.

First, a preamplifier receives a signal from a record player, an FM tuner, a tape deck, a microphone, or the like, amplifies the signal to an appropriate level, and finishes it with a required frequency characteristic and outputs it to the main amplifier. The main amplifier receives the signal and powers up the power to drive the speaker 100 to the speaker 100.

Accordingly, in the situation where the magnetic field is formed in the voice coil 114 by magnetization by magnetic circuits such as the plate 120, the center pole 118, the magnet 122, and the like, the amplification in the main amplifier. When the signal is applied to the voice coil 114, the electromagnetic force is generated toward the diaphragm 112 by Fleming's left-hand law (electromotive force is generated when current flows across the magnetic flux). Accordingly, the bobbin 116 wound around the voice coil 114 is linearly moved toward the diaphragm 112, and the diaphragm 112 of the speaker 100 is vibrated in conjunction with this.

Accordingly, the air facing the diaphragm 112 vibrates to emit sound waves, and the progressive sound waves travel along the traveling tube 200.

The sound wave proceeding to the traveling tube 200 proceeds to the split progress tube 300, the split progress tube 300 is divided into sound waves of each in phase and transmitted to one resonant tube 400.

The one resonator tube 400 joins the in-phase sound waves derived from each of the division progress tubes 300. At this time, the reinforcement interference of the sound wave occurs from the resonance point (F) as a starting point, the amplitude of the sound wave is increased, it is possible to derive a large sound.

Sound waves like this can be converted into sounds by our ears.

The division progress tube 300 can be installed in plural, such as three, four, not two silk, and the sound can be enlarged indefinitely according to the number of the division progress tube 300, thereby avoiding the high range limit. You can do it.

As described above, the speaker using the constructive interference according to the present invention includes: a traveling tube for advancing sound waves output from the speaker, a split traveling tube connected to the traveling tube, and a resonant tube connected to the divided traveling tube; By inducing resonance in the resonator tube, even when a low current is applied to the voice coil, it is possible to hear a high range sound, miniaturization of the speaker, and forced electron deflection due to vibration or magnetic field of the voice coil (microphoning) Phenomena), and can cause constructive interference of sound waves, thereby avoiding the high range.

Claims (2)

A speaker comprising a vibration system, a magnetic circuit portion, and a main body portion supporting the magnetic circuit portion and the vibration system, A speaker 100 receiving the same signal output from the amplifier; A hollow traveling tube 200 having one end connected to an outer circumferential surface of the frame 110 of the speaker 100; A plurality of split progress tubes 300 connected to a diameter smaller than the diameter of the traveling tube 200; It is composed of one resonant tube 400 which is connected to the other end of the split progress tube 300 and is equal to the sum of the cross-sectional areas of the split progress tube 300, so that the sound waves derived from the speaker 100 are After passing through the advancing pipe 200, the division progresses in the same wave form in each of the dividing pipes 300 so as to generate a resonance phenomenon when the confluence of the resonant pipes 400 is possible. Speaker using constructive interference. According to claim 1, wherein each of the divided progress tube 300 has the same cross-sectional area and length, so that the wavelength passing through the divided progress tube 300 is matched, the maximum resonant phenomenon is characterized by using the constructive interference speaker.