KR100258343B1 - Nondirectional speaker system - Google Patents

Abstract

PURPOSE: A non-directional speaker system is provided to generate sound wave uniform across 360° by fixedly installing speaker units in a globe-shaped cabinet and reflector plates in front of the speaker units. CONSTITUTION: Speaker units(71) are fixed in a global speaker cabinet(70) in the upper and lower parts. The first reflector plate(72) is provided in front of the speaker units(71) to diffuse sound wave. A hole(73) is provided in the center of the first reflector plate(72). The second reflector plate(74) is provided over the hole(73). A number of openings(75) are provided across the whole surface of the global speaker cabinet(70) to facilitate transmission of reflected sound from the speaker units(71). Two hemispherical cabinets are detachably coupled to define the speaker cabinet(70). The speaker cabinets(70) include fitting thresholds(76) and fitting grooves(77).

Description

Omni-Directional Speaker System {NONDIRECTIONAL SPEAKER SYSTEM}

The present invention relates to an omnidirectional speaker system, in particular an omnidirectional speaker system for applying a 360-degree stereoscopic omnidirectional speaker system to a general-purpose minimini genre more inexpensively so as to have a 360-degree stereoscopic orientation corresponding to the consumption trend toward home theaters. It is about.

The commercialization of omni-directional speaker systems began around 1958 and has been released by several foreign companies, mainly for HI-FI. The form can be classified into two types in structure.

First of all, by combining several speakers having a certain directivity to be omnidirectional, there is a problem that the total cabinet volume becomes large, the weight is heavy, and the processing is difficult, but the omnidirectional sound source with good sound quality can be obtained.

For example, as shown in FIG. 1, the speaker unit 11 is installed on each side of the hexagonal cabinet 10, and the speaker unit 11 is also installed on each side of the octahedral cabinet 20 and the dodecahedral cabinet 30. In the case of the spherical cabinet 40, a plurality of speaker units 11 are installed in the up, down, left, and right directions so as to be omnidirectional. Each speaker cabinet has a large volume, a heavy weight, and difficult processing. there was.

Second, as a method of obtaining omni-directional to the speaker by using a diffuser (DIFFUSER) on the front of the speaker, as shown in Fig. And a sound absorbing material 52 is installed in the cabinet 50, and a speaker unit 53 is installed upward in the upper part of the cabinet 50, and the cabinet 50 in which the speaker unit 53 is installed. The fixing leg 55 in which the diffuser 54 is installed is installed above. The speaker system reflects the sound of the speaker unit 53 by the diffuser 54 of the fixed leg 55 installed on the upper side and spreads in both directions so that the listener can hear the sound in an omnidirectional manner. While the speaker system as described above can reduce the size of the cabinet itself, it has a problem that it is difficult to adjust omnidirectionally by 360 degrees and sound quality. In addition, in order to achieve omni-directional with a single speaker using a diffuser in front of the speaker, it is difficult to match the mid-range sound balance due to the sensitive directivity of the mid-range and the difference in the sound pressure level with the bass due to the use of the reflector. Therefore, it is not popularized by increasing the sound pressure level of the mid-range or using a diffuser of complicated structure.

As another method of obtaining omni-directional with a speaker using a conventional diffuser (DIFFUSER), as shown in FIG. The lower speaker 62 is installed on the speaker baffle 63 spaced apart from the upper side), and three ducts 64 and three high-pitched speakers 65 are respectively installed on the upper side of the cabinet 60.

The speaker system is radiated in both directions by reflecting the bass of the lower bass speaker 62 is reflected by the diffuser (61) installed on the lower side, it is radiated laterally through the upper duct (64). The high-pitched loudspeaker 65 installed on the upper side of the cabinet 60 radiates the high-pitched sound in both directions so that the listener can hear the sound in an omnidirectional manner. Since the speaker system as described above needs to install several speakers, the cabinet volume becomes large, the weight is heavy, and it is difficult to realize the non-directionality of 360 degrees and the sound quality is difficult to adjust.

It is an object of the present invention to provide an omnidirectional speaker system which produces a uniform sound wave in all directions, especially for 360 degrees.

Another object of the present invention is to make it possible to apply the omnidirectional speaker system that has been realized in an expensive hi-fi speaker system at a lower cost to a general-purpose mini mini genre, while satisfying the consumption trend toward the home theater. In providing a speaker system.

In order to achieve the above object, the present invention is a non-directional speaker system is fixed to the front and rear speaker unit is installed in a spherical shape of the cabinet so as to have a three-dimensional stereoscopic directionality, the reflection plate for the diffusion of sound waves on the front of the speaker unit The size of the acoustic reflector is made to match the size of the vibration radius of the speaker unit to improve reflection efficiency, and to form an opening having a predetermined size in the speaker cabinet in all directions to improve the transmission of the reflected sound. It is characterized by the omni-directional speaker system so that the sound is reflected by the front acoustic reflector to realize a 360-degree stereoscopic omni-directional.

In the present invention, the omni-directional speaker system is fixed to the front and rear speaker unit in a cuboid-shaped cabinet to have a 360 degree three-dimensional directivity, and to form the first and second reflector plate for the diffusion of sound waves on the front of the speaker unit, The size of the acoustic reflector is formed in accordance with the size of the vibration radius of the speaker unit to improve the reflection efficiency, and to form a constant size opening in the speaker cabinet in all directions in order to improve the transmission of the reflected sound. It is characterized by a non-directional speaker system is reflected by the first and second reflector of the three-dimensional stereoscopic omnidirectional.

1 is a configuration diagram of a conventional speaker system of various shapes;

2 is a block diagram of another speaker system according to the related art;

3 is a block diagram of a speaker system according to another embodiment of the prior art;

4 is a perspective view of an omnidirectional speaker system according to an embodiment of the present invention;

5 is a cross-sectional view of an omnidirectional speaker system according to an embodiment of the present invention;

6 is a block diagram of a non-directional speaker cabinet according to an embodiment of the present invention,

7 is an exploded perspective view of an omnidirectional speaker system according to another embodiment of the present invention;

8 is an assembled perspective view of the omnidirectional speaker system of FIG.

9 is a cross-sectional view of an omnidirectional speaker system according to another embodiment of the present invention;

10 is an exploded perspective view of a speaker system for installing the omnidirectional speaker cabinet of the present invention;

11 is a partial cutaway perspective view of a speaker system in which an omnidirectional speaker cabinet of the present invention is assembled;

12 is a cross-sectional view of a speaker system in which an omnidirectional speaker cabinet of the present invention is assembled;

Figure 13 is a state diagram showing the direction of speaker radiation in the speaker system of the present invention.

<Explanation of symbols for the main parts of the drawings>

70,80: speaker cabinet 71,81: speaker unit

72, 82: first reflecting plate 73, 83, 85: aperture hole

74, 84: second reflector plate 75: opening

76: locking jaw 77: locking groove

78: support rib 87: partition

90: bass cabinet 92: hall

94: stand 95: reflector

96: leg 97: screw

98: front panel 99: grill

100: top panel

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

4 is a perspective view of the omni-directional speaker system according to an embodiment of the present invention, Figure 5 is a cross-sectional configuration of the omni-directional speaker system according to an embodiment of the present invention, Figure 6 is an omni-directional according to an embodiment of the present invention This is a block diagram of a speaker cabinet. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components even though they are shown in different drawings.

In the omnidirectional speaker system of the present invention, the speaker unit 71 is fixedly installed in the upper and lower sides of the spherical speaker cabinet 70, and the first reflector plate 72 is provided to spread sound waves on the front surface of the speaker unit 71. To form. An opening hole 73 is formed in the center of the first reflecting plate 72, and a semispherical second reflecting plate 74 is formed on the opening hole 73. In order to better transmit the sound reflected by the sound of the speaker unit 71, an opening 75 having a predetermined size in all directions is formed in the speaker cabinet 70.

The speaker cabinet 70 is a hemispherical cabinet and a hemispherical cabinet are combined to form a spherical cabinet, the speaker cabinet 70 is combined so that the upper, lower center can be separated. The upper and lower speaker cabinets 70 are formed so that the locking jaw 76 and the locking groove 77 of the fixed ribs face each other so as to be coupled to each other. The speaker unit 71 installed in the speaker cabinet 70 may install a speaker in which sound is radiated in the up and down directions, and the speaker unit 71 may be installed to face the upper and lower centers so as to be separated. The upper and lower speaker units 71 may be integrally formed.

The second reflecting plate 74 formed above the opening hole 73 of the first reflecting plate 72 is formed to be supported by the plurality of support ribs 78 to be integrated with the first reflecting plate 72. The first reflecting plate 72 is formed convexly in a hemispherical shape into the speaker cabinet 70, and the second reflecting plate 74 is formed convexly toward the opening hole 73 side. The opening 73 is formed in a circular shape.

In the non-directional speaker system as described above, the second reflecting plate 74 is formed in the opening hole 73 of the first reflecting plate 72, and the opening 75 having a predetermined size in all directions in order to better transmit the reflected sound. The speaker unit 71 is fixed to the upper and lower speaker cabinets 70 formed to face each other. The speaker unit 71 is fixed to the speaker cabinet 70 to maintain a constant distance from the acoustic reflector. Thereafter, the upper and lower speaker cabinets 70 are coupled to each other through the locking projections 76 and the locking grooves 77 so that the speaker cabinets 70 are combined to form a spherical shape so as to have a 360 degree three-dimensional directivity.

In the omni-directional speaker system as described above, the sound radiated to the front surface from the speaker unit 71 strikes the first reflecting plate 72 and is reflected as it is at an angle of incidence and is radiated through the opening 75 of the speaker cabinet 70. At this time, the frequency characteristic of the reflected sound is sensitively influenced by the distance L between the speaker unit 71 and the first reflector 72, and accordingly, the speaker unit 71 can always maintain a constant distance. Sound waves of the speaker unit 71 are directly radiated by the central opening hole 73 of the front first reflecting plate 72 of the speaker unit 71 installed above and below the speaker cabinet 70, and the remaining sound waves Reflected by the hemispherical second reflecting plate 74, the second reflecting plate 72 radiates to the front surface causing the secondary reflection.

The size of the opening hole 73 determines the size of the second reflecting plate 74 and is directly affected by the distance L between the speaker unit 71 and the first reflecting plate 72. Therefore, the size of the aperture 73 is also closely related to the frequency characteristics of the reflected sound. In addition, the spherical surface of the hemispherical first reflecting plate 72 and the second reflecting plate 74 serves as a factor for improving the frequency characteristics.

Referring to Figures 7 to 9 as another embodiment of the present invention will be described the configuration and operation of the present invention.

The speaker system is installed in a speaker cabinet 80 of the rectangular parallelepiped, and the speaker unit 81 is fixed to the inner center of the speaker cabinet 80 so as to face the partition 87. A first reflecting plate 82 is formed on the outer front surface of the speaker cabinet 80 to form an opening hole 83 in the speaker cabinet 80 to spread sound waves on the front surface of the speaker unit 81. An opening hole 85 is formed in the center of the first reflecting plate 82, and a second reflecting plate 84 is formed on an outer front surface of the opening hole 85. Sound of the speaker unit 81 fixed to the speaker cabinet 80 is installed to be radiated in all directions by the first reflecting plate 82 and the second reflecting plate 84.

The speaker cabinet 80 is a cube cabinet and a cube cabinet is combined to form a cuboid cabinet, the speaker cabinet 80 is a fixed rib 86 is formed on both sides, the center is coupled to be separated.

The first reflecting plate 82 formed on the front surface of the opening hole 83 formed in the front speaker cabinet 80 of the speaker unit 81 is supported by a plurality of support ribs 88 to be integrated with the speaker cabinet 80. The second reflecting plate 84 formed on the front surface of the opening hole 85 of the first reflecting plate 82 is formed to be supported by the plurality of support ribs 89 to be integrated with the first reflecting plate 82. The first reflecting plate 82 is formed convexly convex toward the opening hole 83 side of the speaker cabinet 80. The second reflecting plate 84 is formed convexly convex toward the opening hole 85 side of the first reflecting plate 82. Each of the openings 83 and 85 is formed in a circular shape.

In the omnidirectional speaker system as described above, the speaker unit 81 is fixed to the front and rear speaker cabinets 80 on which the first reflecting plate 83 and the second reflecting plate 85 are formed so as to better transmit the reflected sound. do. The speaker unit 81 is fixed to the speaker cabinet 80 to maintain a constant distance from the first reflecting plate 82.

In the omnidirectional speaker system as shown in FIG. 9, the sound (a) radiated from the speaker unit 81 to the front as an arrow hits the first reflecting plate 82 through the opening hole 83 of the speaker cabinet 80. It is reflected as it is with the angle of incidence and radiated laterally and rearward. At this time, the frequency characteristic of the reflected sound (a) is sensitively affected by the distance between the speaker unit 80 and the first reflecting plate 82, and accordingly, the speaker unit 81 can always maintain a constant distance. The sound b emitted as an arrow toward the front center of the speaker unit 81 by the central opening 85 of the first reflecting plate 82 of the speaker cabinet 80 is partially radiated directly and the remaining sound ( b) is reflected by the hemispherical second reflecting plate 84 and is radiated forward by causing the second reflecting by the first reflecting plate 82.

The size of the opening hole 85 of the first reflecting plate 82 determines the size of the second reflecting plate 84 and is directly affected by the distance between the speaker unit 81 and the first reflecting plate 82. Therefore, the size of the aperture 85 is also closely related to the frequency characteristics of the reflected sound. In addition, the spherical surface of the hemispherical first reflecting plate 82 and the second reflecting plate 84 serves as a factor for improving the frequency characteristics.

10 and 11, the speaker system coupled to the bass speaker cabinet will be described below.

The hexahedral bass cabinet 90 is provided with a sound absorbing material 91 on the wall formed a space therein, and forms a hole 92 in the lower end of the bass cabinet (90). The bass speaker unit 93 is fixed downward in the hole 92. The bottom of the bass cabinet (90) is coupled to the reflector plate (95), the center of which is convex at the center position and the stand (94) formed of the legs (96) on both sides with the bass cabinet (90) and screws (97). The front panel of the bass cabinet 90 is provided with a front panel 98, the upper and middle speaker unit 81 is installed in the front and rear, and the front and rear surfaces of the omnidirectional speaker consisting of the first reflecting plate 82 and the second reflecting plate (85). Secure the cabinet (80). The upper panel 101 in which the grille 99 is installed to surround the omnidirectional speaker cabinet 80 is fixedly installed on the bass cabinet 90. The upper panel 101 is a grill 99 is installed on the outer surface of the center protruding in a square.

The omni-directional speaker system may be provided with a spherical speaker cabinet having a first, second reflecting plate formed in front of the speaker unit as opposed to one embodiment of the present invention, the speaker unit as opposed to another embodiment of the present invention It is possible to install a rectangular parallelepiped speaker cabinet in which the first and second reflecting plates are formed at the front.

In the omnidirectional speaker system as described above, the sound of the bass speaker unit 93 installed in the lower hole 92 of the bass cabinet 90 as shown in FIG. 12 and FIG. Reflected by the reflecting plate (95) formed convex in and radiated in all directions through the space between the bass cabinet (90) and the stand (94). The sound (a) radiated to the front in the middle and high tone speaker unit 81 installed on the upper part of the bass cabinet 90 as an arrow is directed to the first reflecting plate 82 through the opening hole 83 of the omnidirectional speaker cabinet 80. It strikes and reflects as it is with the angle of incidence and radiates in all lateral and backward directions. The central sound of the mid-high loudspeaker unit 81 is radiated through the central opening hole 85 of the first reflecting plate 82 of the speaker cabinet 80. At this time, the sound (b) emitted as an arrow toward the front center of the mid-high loudspeaker unit 81 is partially radiated directly, and the remaining sound (b) is reflected on the hemispherical second reflecting plate 84 and again the first reflecting plate ( 82) causes secondary reflection and radiates forward. As described above, in the speaker system, the sound generated from the bass speaker unit 93 is reflected by the convex reflector 95 of the stand 94 and radiated in all directions, and the sound of the upper and middle speaker unit 81 is the first reflection plate. It is radiated to the front and all directions by the (83) and the second reflecting plate (84).

As described above, according to the present invention, it is possible to produce a uniform sound wave in all directions, especially about 360 degrees, and to cope with the consumption trend toward the home theater while allowing the omnidirectional speaker system to be applied to the general mini mini genre more inexpensively. There is an advantage to realize a 360 degree stereo omni speaker system.

Claims (19)

In an omnidirectional speaker system, A speaker unit fixedly mounted to the speaker cabinet; A first reflecting plate installed to spread sound waves of the speaker unit; An opening hole formed in the center of the first reflecting plate; The omnidirectional speaker system, characterized in that consisting of a second reflector plate formed on the upper portion of the opening. The omni-directional speaker system of claim 1, wherein the speaker cabinet comprises a hemispherical cabinet at the top and a hemispherical cabinet at the bottom, and the upper and lower speaker cabinets are coupled in a spherical shape so that the upper and lower centers can be separated. The omni-directional speaker system according to claim 2, wherein the upper and lower speaker cabinets are formed such that the locking jaws and the locking grooves of the fixing ribs face each other so as to be coupled to each other. The omni directional speaker system according to claim 1, wherein the speaker unit is installed to face each other so as to be separated from each other in the speaker cabinet. The omni-directional speaker system according to claim 1, wherein the speaker cabinet is provided with openings having a predetermined size in all directions for better transmission of the sound reflected by the speaker unit. The omni directional speaker system according to claim 1, wherein the second reflecting plate is formed to be supported by a plurality of support ribs to be integrated with the first reflecting plate. 7. The omni directional speaker system according to claim 6, wherein the first reflecting plate is formed convexly convex into the speaker cabinet. 7. The omni-directional speaker system according to claim 6, wherein the second reflecting plate is formed in a hemispherical shape convex toward the opening hole side. The omni directional speaker system according to claim 1, wherein the aperture is formed in a circular shape. In an omnidirectional speaker system, A cuboid shaped speaker cabinet; Speaker units respectively installed to face the inner center of the speaker cabinet; A first reflecting plate provided on an outside of the speaker unit in order to spread sound waves in the front speaker cabinet; An opening hole formed in the center of the first reflecting plate; The omnidirectional speaker system comprising a second reflecting plate installed inwardly opposite the speaker cabinet of the opening hole so that the sound of the speaker unit is radiated in all directions by the first reflecting plate and the second reflecting plate. . The omni-directional speaker system of claim 10, wherein the speaker cabinet is coupled to the cube cabinet so that the center of the cube cabinet is separated from the center, and the speaker cabinet has fixed ribs formed at both sides thereof. The method of claim 10, wherein the first reflecting plate is supported by a plurality of support ribs to be integrated with the speaker cabinet, the second reflecting plate formed on the front of the opening hole of the first reflecting plate is a plurality of support ribs to be integrated with the first reflecting plate. Omnidirectional speaker system characterized in that it is formed to be supported by. 13. The omni directional speaker system according to claim 12, wherein the first reflecting plate is formed convexly convex into the speaker cabinet. 13. The omni directional speaker system according to claim 12, wherein the second reflecting plate is formed in a hemispherical shape convex toward the opening hole side. 11. The omni directional speaker system according to claim 10, wherein the aperture is formed in a circular shape. In an omnidirectional speaker system, A cube bass cabinet; A sound absorbing material attached to a wall surface forming a space inside the cabinet; A hole formed at a lower end of the bass cabinet; A bass speaker unit installed in the hall; A stand having a leg coupled to a lower end of the bass cabinet and a reflector at a central position; A front panel installed at the front of the bass cabinet; The first reflector plate having an opening hole formed on the outside for spreading sound waves on the front and rear surfaces of the mid-to-high bass speaker unit installed in front and rear of the middle bass cabinet, and the second reflection plate provided on the upper part of the opening hole formed in the first reflection plate. Speaker cabinet and; And a grille to surround the omnidirectional speaker cabinet, the omnidirectional speaker system comprising a top panel fixed to the bass cabinet. 17. The omni directional speaker system according to claim 16, wherein the reflector of the stand is formed convexly in the center of the bass speaker unit. 17. The omnidirectional display according to claim 16, wherein the first reflector is supported by a plurality of support ribs to be integrated with the omnidirectional speaker cabinet, and the second reflector is supported by a plurality of support ribs to be integrated with the first reflector. Speaker system. 17. The omni directional speaker system according to claim 16, wherein the first reflecting plate and the second reflecting plate are formed convexly convex into the omnidirectional speaker cabinet.

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