KR20040003928A - A Sound Reproducing System Using Sound Pressure - Google Patents

Abstract

PURPOSE: A system for reproducing audio using sound pressure is provided to reduce the noise and vibration by dividing a pathway of sound pressure into a plurality of sections. CONSTITUTION: A sound pressure generator(20) generates sound pressure. A container(200) operates as a path of the sound pressure generated from the sound pressure generator(20). A sound pressure controller(40) is attached to an opening portion of the container(200). The sound pressure controller(40) is comprised of a plurality of conductive wires disposed in column and row. A magnet is installed away from the sound pressure controller(40). The conductive wires vibrate by an interaction of magnetic field generated from the magnet and a current flowing on the conductive wires. When sound pressure generated in the sound pressure generator(20) passes through a seamless space of the conductive wires, a variation of the seamless space causes the change of the sound pressure so that a sound signal applied to the conductive wires is reproduced.

Description

Sound Reproducing System Using Sound Pressure

The present invention relates to a voice reproducing system by controlling sound pressure, and more particularly, to a magnet used in a voice reproducing system through sound pressure control by wire vibration generated by interaction of a fixed permanent magnet and a wire magnetic field caused by current flowing through the wire. It's about structure.

Sound is a vibration of air, that is, a small change in pressure, and the sound is reproduced using the principle of pressure change according to the vibration.

In general, many types of voice reproduction systems have been proposed. However, when classified according to shape, coin speakers classified into a cone type, a dome type, a horn type, etc., and the coin type speaker In contrast, the diaphragm is a front-driven ribbon-type speaker that is mainly used as a tweeter, two electrodes are installed at narrow intervals, and the speaker is operated by suction and repulsion by the force of static electricity, and a hi-plimmer speaker using the piezo effect. If this is further classified according to the frequency characteristics, a woofer, a speaker unit dedicated to bass, a scoker, or a tweeter, a speaker unit for midrange and treble, can be used.

An example of the structure of a cone speaker that is typically used to understand the structure of a general speaker will be described.

1 is a cross-sectional view showing an example of a general cone speaker.

That is, in the speaker 10, a plate 14 having a center pole yoke 15 is disposed at the center of the lower side of the frame 13 on which the diaphragm 11 and the center cap 12 are formed, and the plate 14 is disposed. The outer peripheral surface of the magnet 16 is provided.

In addition, a damper 17 is provided between an inner side of the frame 13 and an inner side of the diaphragm 11, and an upper end of the voice coil 17 is connected to an inner circumferential surface of the diaphragm 11, and a lower end thereof is an inner circumferential surface of the plate 14. And the outer circumferential surface of the center pole yoke 15.

In addition, an appropriate input terminal 18 for inputting a voice signal is provided at a suitable place of the frame 13.

Therefore, when the electric voice signal is input to the input terminal 18, a current flows through the voice coil 17 so that the center pole yoke 15, the plate 14, and the magnet 16 form a magnetic circuit. Under the influence of the magnetic field formed by the magnetic circuit, the voice coil 18 vibrates up and down about the outer circumferential surface of the center pole yoke 15.

When the voice coil 18 is operated upward by the principle as described above, the diaphragm 11 is moved upward by the operation of the voice coil 18, and a "+" sound pressure is generated, and the voice coil 18 When operated downward, the diaphragm 11 is moved downward by the operation of the voice coil 18, and "-" sound pressure is generated and becomes like a reproduction waveform curve shown in FIG. 2, and the frequency range is approximately 20 Hz. When it is about 20 kHz, it can be detected as an ear as sound.

However, in the speaker of the general structure as described above, there is a problem of the first to solve the following.

That is, when the sound of the speaker is radiated to the outside by the above-described operating principle, the sound is radiated to the outside through the damper 17, the diaphragm 11, and the center cap 12. While radiating to the outside, the damper 17, the diaphragm 11 and the center cap 12 had a problem that the vibration and the resulting vibration sound.

As described above, the vibration sound generated from the damper 17, the diaphragm 11, and the center cap 12 is mixed with the reproducing sound radiated to the outside through the speaker, so that the noise is mixed when the sound is generated from the speaker. Such factors are becoming a measure of speaker quality.

In addition, as described above, the damper 17, the diaphragm 11, and the center cap 12 are caused by the vibration generated from the damper 17, the diaphragm 11, and the center cap 12, and thus the electrical signal is affected by the inertia. Transient characteristics become a factor deteriorating in the process of converting the mechanical vibration into a mechanical vibration.

In order to solve this problem, the present applicant has proposed a voice reproduction system disclosed in Publication No. 1992-2443 as shown in FIG. The system includes a cylinder 28 having three chambers to pass up and down, a vibrator 25 embedded in the hollow of the cylinder 28 horizontally, and a center fixed to one side of the vibrator 25. Magnetic circuits consisting of poles and yokes 21, plates 32 and magnets 23, left and right gates of a central outer circumferential surface 25 'of the vibrator 25, and inner left and right wall surfaces of the cylinder 28 And a high pressure tank 29 connected to the left side of the cylinder 28, a low pressure tank 29 ′ connected to the right side of the cylinder 28, and a horn installed integrally with the upper central opening of the cylinder 28. 27, the left and right gates of the vibrator 25 are displaced according to the voice signal voltage when the voice signal voltage is applied to the pair of input terminals 23 and 23 '. By opening and closing the inner wall surface to control the amount of sound pressure transmitted through the inner wall surface.

However, such a system can obtain an excellent reproduction effect on sound quality compared to a conventional cone-shaped speaker, but in order to precisely control the vibrator 25 according to the voice signal voltage, not only a vibrator or the like must be precisely manufactured, but also its structural There is a limit to ultra precision control by the characteristic. As a result, such a problem increases the production cost of the speaker by eliminating the space for mass production of the speaker. Therefore, it becomes a factor which hinders the popularization of a high quality speaker.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a voice playback system having a new structure that is capable of high-quality playback and suitable for mass production.

Another object of the present invention is to provide an omnidirectional audio playback device.

Still another object of the present invention is to provide a sound reproducing apparatus having a sound pressure generating device capable of preventing noise.

1 is a cross-sectional view showing an example of a typical speaker.

Figure 2 is a waveform diagram of the operating characteristics of a conventional speaker.

3 is a cross-sectional view showing another conventional speaker structure.

4 is a perspective view of a voice playback system using a sound pressure according to the present invention.

5 is an exploded perspective view of the sound pressure control device according to the present invention.

FIG. 6 is an enlarged perspective view showing a partial extract to show the main part of the sound pressure control device of FIG. 5 in detail; FIG.

7A and 7B are sectional views for showing an operating state of the sound pressure control device.

8 is a view showing a cylindrical omnidirectional audio playback device according to the present invention.

9 is a view showing a polygonal omni-directional voice playback apparatus according to the present invention.

FIG. 10 is a diagram illustrating a magnet structure used in the voice reproducing apparatus of FIG. 8. FIG.

FIG. 11 is a diagram illustrating a magnet structure used in the voice reproducing apparatus of FIG. 9; FIG.

12 is a diagram showing the structure of a voice reproducing apparatus according to another embodiment of the present invention.

13 is a diagram showing the structure of a sound reproducing apparatus according to another embodiment of the present invention.

14A-14D illustrate magnet assembly structures in accordance with another embodiment of the present invention.

15a to 15c is a view showing a sound pressure generating device using a motor with a fan according to the present invention.

16 is a view showing a sound reproducing apparatus equipped with a sound pressure generating apparatus according to another embodiment of the present invention.

17 and 18 are views showing in detail the structure of the sound pressure generating device shown in FIG. And

19 is a view showing a motor mounting structure for preventing noise in the sound pressure generating device of the present invention.

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

20; Sound pressure generator 30; Magnet

40; sound pressure control device 41;

42; wire gap 43; audio signal input terminal

44; wire 45; thin film

49; support plate 100: negative pressure through hole

Technical solution of the present invention for achieving the above object is a sound pressure generating device for generating a sound pressure; A vessel serving as a passage for the negative pressure generated from the negative pressure generating device, wherein the portion for discharging or suctioning the negative pressure is opened; Two conductive wires arranged in a plurality of columns or rows, some of the conductive wires in the plurality of rows or rows are sealed with a thin film, and two adjacent conductive wires are not sealed in the thin film among the plurality of rows or rows of conductive wires A negative pressure control device configured to be opposite in direction to each other when currents flowing through the two adjacent conductive wires are applied to the wires when a negative signal current is applied to the wires; And magnets disposed adjacent to the sound pressure control device at intervals; The conductive wire vibrates due to the interaction of the magnetic field of the magnets arranged adjacently with the current flowing through the conductive wire of the negative pressure control device, and the conductive wire is not sealed by the vibration of the two conductive wires. The interval between the two changes, and when the sound pressure generated in the sound pressure generating device passes through the unsealed, the sound pressure is changed by the change of the interval, characterized in that the audio signal applied to the wire is reproduced.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object will be described in detail.

Figure 4 shows the structure of the sound reproducing apparatus using the sound pressure according to the present invention, the sound pressure generating device 20 for generating sound pressure, the container 200 which serves as a passage of the sound pressure generated from the sound pressure generating device 20 In addition, the container is composed of a sound pressure control device 40 mounted on the open part of the open part so as to discharge or suck the negative pressure.

The interior of the vessel between the sound pressure generating device 20 and the sound pressure control device 40 is divided into several zones through a plurality of partitions, and these zones are connected to each other to form passages 201, 202, and 203 of sound pressure. In addition, a sound absorbing material 220 such as a sponge may be attached to the inside of each zone to absorb noise generated by the sound pressure generating device 20. As described above, dividing the interior of the container 200 into several zones to lengthen the sound pressure passage and attaching the sound absorbing material to the surface of each zone is necessary to reduce noise due to the characteristics of the voice reproducing apparatus.

In addition, as shown in FIG. 4, the container is extended to form a plurality of zones in the lower portion of the negative pressure generator 20 to form passages 205 and 206 for suction or discharge from the negative pressure generator. It is preferable to block the noise of the sound pressure generating device discharged through the outside.

5 is an exploded perspective view of the sound pressure control device 40 according to the present invention, in which a single conductive wire 44 having a diameter of about 0.1 to 0.5 mm mm is reciprocally arranged in a zigzag form, and the first two adjacent wires are made of raw rubber and poly. It is made by sealing every two adjacent wires with a thin film 45 having elasticity such as ester, polyethylene, silicon or the like.

If two adjacent wires of the portion not sealed by the thin film 45 are in contact with each other, it may cause noise due to friction during wire vibration. The wire formed in this way is fixed to the end of the wire 44 arranged reciprocally cross on the frame of the open frame forms a negative pressure control device (40).

A magnet 30 having a plurality of sound pressure passing holes formed adjacent to the sound pressure control device 40 is mounted. At this time, the magnet 30 may be attached anywhere before and after the sound pressure control device 40.

Referring to Figure 6 describes the wire vibration action of the sound pressure control device 40 in detail as follows. The wire of the sound pressure control device 40 vibrates as the voice signal voltage is applied to the input terminal 43. The vibrating direction is a direction in which two wires connected by the thin film 45 compress the thin film 45. Is done. This principle is achieved by the interaction of a fixed magnetic field formed by the magnet 30 (ⓝ, ⓢ in the drawing) and the magnetic field generated by the current applied to the wire, as shown in FIG. 6.

In FIG. 6, ⓝ is a magnetic field component transmitted through the second plate 60 and the second center pole yoke, and ⓢ is transmitted through the first plate 50 and the first center pole yoke 51. Magnetic field component. In addition, the magnetic field formed around the wire 44 is formed in accordance with the current flowing in the wire, the wire magnetic field adjacent to the magnetic field component ⓝ of the magnet 30 is N, S, the same polarity is pushed each other and the other polarity is pulled together. That is, since the magnetic field of the magnet 30 is fixed and the wire is movable in the direction of compressing the thin film, the magnetic field of the magnet and the magnetic field due to the current flowing through the wire interact so that the wire compresses the thin film according to the current flowing through the wire. do.

At this time, the other wires connected by the thin film 45 are reversed in the current direction by the reciprocating arrangement of the single wires, so that the magnetic fields formed around the wires are also reversed. Therefore, as shown in FIG. 7B, the wires vibrate in the direction of compressing the thin film, so that the distance S between the wires 42 which are not sealed by the thin film 45 is changed.

In other words, before the voice signal is applied, as shown in FIG. 7A, the contact or a slight interval S is applied to each other. When the voice signal is applied through the input terminal 43, the wires 44 are thin film 45 as shown in FIG. 7B. By vibrating in the compression direction, the gap S between the unsealed wires 42 is changed to the gap S '. At this time, since the change in the sound pressure varies depending on the voice signal applied to the wire, it is possible to precisely control the sound pressure according to the voice signal. This change in sound pressure is reproduced as sound.

8 is a view showing the structure of a cylindrical omnidirectional audio reproducing apparatus according to the present invention, in which the container 200 is formed in a cylindrical shape, and has a predetermined width over the entire circumference of the cylinder of the container 200. After opening, the cylindrical sound pressure control device 40 is mounted. At this time, as shown in FIG. 10, a magnet 30 formed in a cylindrical shape in which a plurality of negative pressure passing holes 100 are formed is used. As a result, the sound pressure generated by the sound pressure generating device 20 is radially discharged or sucked to constitute the omnidirectional sound reproducing apparatus.

FIG. 9 is a diagram illustrating a structure of an omnidirectional audio playback device according to another embodiment of the present invention. In the structure of FIG. 4, a container 200 is formed in a hexagonal shape, and each surface of the container 200 is fixed. After opening in width, six planar sound pressure control devices 40 are mounted on the open portions of each surface. In this case, as shown in FIG. 11, the polygonal magnet 30 in which the plurality of sound pressure passing holes 100 are formed may be formed by combining six planar magnets 30. Similarly, the sound pressure generated by the sound pressure generating device 20 may be discharged or sucked through each surface of the polygonal cylinder to form an omnidirectional sound reproducing apparatus.

12 is a view showing a structure of a voice reproducing apparatus according to another embodiment of the present invention, in which the container 200 is formed in a cylindrical shape, and covers a half of the cylinder circumference of the container 200. After opening to a predetermined width, the semi-cylindrical sound pressure control device 40 is mounted. At this time, the magnet (not shown) is used that is formed in a cylindrical shape formed with a plurality of negative pressure through-holes. As a result, the sound pressure generated by the sound pressure generating device 20 is discharged or sucked radially on the half curved surface of the semi-cylinder, so that the sound reproduction angle can be expanded.

FIG. 13 is a view illustrating a structure of a semi-cylindrical speech reproducing apparatus according to another embodiment of the present invention, wherein the container 200 is formed in a semi-cylindrical shape in the structure of FIG. After opening to a predetermined width over, the semi-cylindrical sound pressure control device 40 is mounted. At this time, the magnet (not shown) is used that is formed in a cylindrical shape formed with a plurality of negative pressure through-holes. As a result, the sound pressure generated by the sound pressure generating device 20 is discharged or sucked radially on the half curved surface of the semi-cylinder, so that the sound reproduction angle can be expanded.

As shown in Fig. 4 and Fig. 13, the sound pressure control device 40 may be formed in a dome shape (not shown) instead of being manufactured in a planar shape and a semi-cylindrical shape.

14A to 14D illustrate a structure of a magnet 30 assembly used in various types of voice reproducing apparatuses according to the present invention. Instead of forming a plurality of negative pressure through holes in a single magnet 30 as shown in FIG. 5, a plurality of small magnet pieces 30 around the negative pressure through holes on a support plate 49 having a plurality of negative pressure through holes formed therein. ) Is attached. Such a structure is easy to manufacture not only flat as in FIG. 14a but also curved in FIG. 14b and cylindrical in FIG. 14c. In addition, after forming a negative pressure passing hole 101 similar to the negative pressure passing hole 100 in the magnet pieces in the support plate 49 of FIG. 14d, the negative pressure passing hole 100 of the support plate 49 and the negative pressure passing hole of the magnet ( It is also possible to fabricate a structure in which 101 is matched and attached.

15A to 15C are diagrams showing embodiments of the sound pressure generating device 20 according to the present invention.

FIG. 15A illustrates a negative pressure generating device 20 in which one motor or solenoid 500 with a fan 501 is mounted, and generates a negative pressure by rotation of the fan 501.

FIG. 15B shows a configuration of the sound pressure generating device 20 by arranging a plurality of small motors or solenoids 500 with a fan 501 in a row, and is suitable for application to a flat type sound reproducing apparatus.

FIG. 15C illustrates a negative pressure generator 20 in which a motor or solenoid 500 having a fan 501 having a long wing in the longitudinal direction of the long fan support shaft 502 is arranged to form a negative pressure generator 20. It is suitable for application to a reproducing apparatus.

16 and 17 illustrate a sound reproducing apparatus and a sound pressure generating device to which the sound pressure generating device 20 is applied according to another embodiment of the present invention, the sound pressure generating device 20 reciprocating in a predetermined space. 300, a discharge unit 310 for reciprocating the air compression unit 300 (310 in Fig. 18), discharged to discharge the compressed air (negative pressure) out of the predetermined space when the air compression unit 300 advances in one direction When the valve 301 and the air compressor 300 retreat in the opposite direction, the valve 301 and the intake valve 302 are configured to suck external air (negative pressure) into the predetermined space.

In addition, when the air compressor 300 moves forward, the discharge valve 301 operates, and at the same time, the suction valve 304 operates in a space opposite to the travel direction of the air compressor 300, and the air compressor 300 It is preferable to configure the discharge valve 303 to operate when the retreat) and at the same time to operate the suction valve 302 in a space opposite to the travel direction of the air compressor 300.

As shown in Fig. 18, it is possible to generate more uniform sound pressure by arranging two generators of sound pressure by reciprocating motion in parallel.

19 illustrates a structure capable of preventing the generated noise or vibration from being transmitted to the outside when using the sound pressure generator 20 using the motor or the solenoid 500 having high noise or vibration. The motor or solenoid 500 is installed by floating in a predetermined space 505 with a string 510 such as an elastic body, and the air (negative pressure) generated from a fan (not shown) mounted on the motor 500 is made of an elastic material such as rubber. Suction or discharge through the corrugated pipe 520 produced by. When configured in this way, vibration or noise of the motor or solenoid 500 may be minimized from being transmitted to the outside through the container.

As described in detail above, according to the present invention, a voice reproducing system using sound pressure can be manufactured in a cylindrical, semi-cylindrical, polygonal, and dome shape, so that the voice generated in the voice reproducing apparatus can be emitted omnidirectionally.

In addition, by dividing the passage of the sound pressure into several zones and attaching the sound absorbing material to the surface of each zone, or by configuring the sound pressure generating device in the form of suspending in the space using the elastic cord, it is possible to minimize the noise or vibration.

In particular, by configuring the structure of the sound pressure generating device in various forms, it is possible to implement a flat type voice playback device.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the forms and structures applied in the embodiments, and various modifications can be made by those skilled in the art.

Claims (17)

A sound pressure generating device for generating sound pressure; A vessel serving as a passage for the negative pressure generated from the negative pressure generating device, wherein the portion for discharging or suctioning the negative pressure is opened; Two conductive wires arranged in a plurality of columns or rows, some of the conductive wires in the plurality of rows or rows are sealed with a thin film, and two adjacent conductive wires are not sealed in the thin film among the plurality of rows or rows of conductive wires A negative pressure control device configured to be opposite in direction to each other when currents flowing through the two adjacent conductive wires are applied to the wires when a negative signal current is applied to the wires; And A magnet disposed adjacent to the sound pressure control device at intervals; The conductive wire vibrates due to the interaction of the magnetic field of the magnets arranged adjacently with the current flowing through the conductive wire of the negative pressure control device, and the conductive wire is not sealed by the vibration of the two conductive wires. The sound pressure applied to the wire is reproduced by changing the sound pressure caused by the change of the interval when the sound pressure generated by the sound pressure generating device passes through the unsealed space. Voice playback system. The method of claim 1, The vessel is formed in a cylindrical shape, the vessel is opened in a constant width over the entire circumference of the cylinder, the sound pressure control device is formed in a cylindrical shape, the magnet is formed in a cylindrical shape, the sound pressure generated in the sound pressure generating device radially Voice reproducing apparatus using the sound pressure, characterized in that the discharge or suction. The method of claim 1, The container is formed in a cylindrical shape, the container is opened in a predetermined width over a half of the circumference of the cylinder, the sound pressure control device is formed in a semi-cylindrical shape, the magnet is formed in a semi-cylindrical shape, A sound reproducing apparatus using sound pressure, characterized in that the generated sound pressure is discharged or sucked in half the radial of the semi-cylindrical curved surface. The method of claim 1 The container is formed in a semi-cylindrical shape, the container is opened to a semi-circular curved surface with a predetermined width, the sound pressure control device is formed in a semi-cylindrical shape, the magnet is formed in a semi-cylindrical shape, the sound pressure generated in the sound pressure generating device is half Voice reproducing apparatus using the sound pressure, characterized in that the discharge or suction in the radial half of the cylindrical surface. The method of claim 1, The vessel is formed in a polygon, the vessel is opened in a predetermined width in each plane of the polygon, the sound pressure control device is formed in a flat shape, the magnet is formed in a plane, the sound pressure generated in the sound pressure generating device is Sound reproducing apparatus using the sound pressure, characterized in that the discharge or suction in the plane. The method of claim 1, The sound pressure control device is formed in a dome shape, the magnet is formed in a dome shape, the sound pressure generation device using a sound pressure, characterized in that the sound pressure generated in the sound pressure generator is discharged or sucked radially of the domed curved surface. The method according to any one of claims 1 to 6, And the magnet is a magnet assembly formed by attaching a plurality of pieces of magnet around the sound pressure through hole on a support plate having a plurality of sound pressure through holes. The method of claim 1, The interior of the container is divided into a plurality of areas in communication with each other, the sound reproduction system using sound pressure, characterized in that extending the passage of the sound pressure. The method of claim 1, The sound pressure generating device is a voice playback system using a sound pressure, characterized in that consisting of a fan or a motor attached to the solenoid. The method of claim 9, The sound playback system using sound pressure, characterized in that the fan is made of a long blade attached in the longitudinal direction of the long support shaft. The method of claim 1, The sound pressure generating device is a voice playback system using a sound pressure, characterized in that the fan is attached to a plurality of motors or solenoids arranged in a row. The method of claim 1, The negative pressure generating device may include an air compression unit reciprocating in a predetermined space, a driving unit reciprocating the air compression unit, a discharge valve for discharging compressed air (negative pressure) out of the predetermined space when the air compression unit is advanced in one direction; And a suction valve which sucks outside air into the predetermined space when the air compressor retreats in the opposite direction. The method of claim 12, A first discharge valve for discharging the compressed air (negative pressure) out of the predetermined space when the air compressor moves forward in one direction, and a first intake valve for suctioning external air into a space opposite the traveling direction of the air compressor; And a second discharge valve for discharging the compressed air (negative pressure) out of the predetermined space when the air compressor retracts in the opposite direction, and second intake valves for sucking external air into the space opposite the traveling direction of the air compressor. Voice playback system using a sound pressure, characterized in that. The method according to claim 12 or 13, The sound pressure generation system using a sound pressure, characterized in that the sound pressure generating device is composed of a plurality. The method according to claim 12 or 13, And a motor or solenoid mounted in a space using a string. The method of claim 15, The sound reproduction system using the sound pressure, characterized in that the string is an elastic body. The method according to claim 1 or 6, Sound absorbing system using a sound pressure, characterized in that the sound absorbing material is attached to the inside of the container or the inner surface divided into a plurality of areas of the container.