KR100245422B1 - Back load horn speaker enclosure - Google Patents

Abstract

The present invention relates to an enclosure for accommodating a speaker, and more specifically, a space-saving backdoor horn speaker which can obtain the characteristics of a sealed enclosure or a mixed enclosure by a simple operation, and which has a smaller tone and a better sound than a conventional mixed enclosure. It is related to an enclosure (Back-Load-Horn Speaker Enclosure).

The loudspeaker enclosure of the present invention includes a pair of side plates 34, a top plate 32 located at the upper end, a bottom plate 36 located at the lower end, and a rear side for constituting the outer case of the enclosure. In a speaker enclosure having a back plate (38) and a front baffle (60) on which a speaker (62) is mounted, a fixed plate (40) provided at the center of the inner surface of the back plate (38), and the fixing plate (40). A pair of sound plate 42 is installed to be spaced apart at regular intervals on both sides of the pair of inclined toward the fixed plate 40, and the upright of the fixed plate 40 and a pair of sound plate 42 upright The intermediate plate 44 which is in close contact with the side surface and blocks the space, is combined with the lower end of the intermediate plate 44 to form an outlet (54) upper portion and in close contact with the side plate 34 of both side end portions to close the inlet (48) It is provided in the lower side of the two-layered plate 46 and the two-layered plate 46 to form the The sound wave transmitted through the inlet 48 is guided to the space between the side plate 34 and the sound wave plate 42 and the outlet for discharging the sound wave passed between the fixed plate 40 and the sound wave plate 42 to the outside. (54) It is characterized by consisting of an outlet guide 52 to form a side.

Description

Backwoodhorn Speaker Enclosure {BACK LOAD HORN SPEAKER ENCLOSURE}

The present invention relates to an enclosure for accommodating a speaker, and more specifically, a space-saving backdoor horn speaker which can obtain the characteristics of a sealed enclosure or a mixed enclosure by a simple operation, and which has a smaller tone and a better sound than a conventional mixed enclosure. It relates to an enclosure (Back Load Horn Speaker Enclosure).

The loudspeaker horn speaker has been temporarily used as a means of obtaining a lot of energy by increasing the acoustic efficiency when the performance of the conventional amplifier is low. However, due to the large size of the loudspeaker system and the high cost of assembly, it is not suitable for general household use, and the increase of the physical efficiency becomes less meaningful according to the performance improvement of the amplifier. . Nevertheless, the unique sound of the horn speaker and the bright and cheerful sound attract the many music lovers. Therefore, the loudspeaker enclosure with the structure that can feel the tone characteristics of the horn speaker is used in the general dynamic speaker unit.

For the structure of the conventionally used loudspeaker enclosure, referring to the side cross-sectional view of the enclosure 10 of FIG. 1, the indirect wave (sound wave) output to the rear of the speaker 18 installed on the back of the unit above the enclosure 10 is provided. The sound path is refracted by repeating up and down in the direction of the arrow and exits through the outlet 26 located at the bottom, and then merges with the direct wave output directly through the speaker 18 to the front. It has an increasing structure.

The indirect wave passing through the sound wave passes through the refracted portion (formed by the free end of the sound wave plate 20) formed inside the enclosure 10, and the middle and high frequencies in the sound wave by the action of an acoustic filter. The effect is that the ingredients are blocked and only the low pass ingredients are passed through. In addition, as the indirect wave progresses, the horn structure in which the cross-sectional area of the sound intensity gradually increases exponentially increases the efficiency due to the effect of sound impedance matching between the speaker unit and the free space. The effect is to change the phase and merge with the direct wave output to the front of the unit, which is powerfully reproduced as a heavy bass that is difficult to reproduce normally. The structure of the horn, referring to the basic form of FIG. 2, has a very large size compared to the inlet 22 while the space on the inlet 22 side is narrow and the cross-sectional area gradually increases exponentially. It can be seen that the indirect wave is refracted and passed through the sound wave to be modulated into a characteristic tone.

However, in order to obtain satisfactory bass reinforcement effect, since the indirect wave must pass a considerable length of sound, the enclosure's appearance becomes large, and a large area plate must be used, but the wider the plate section, the more sensitive and harmful it is to the effects of vibration. Since resonance is likely to occur, there is a problem in that a thick and high-strength material must be used to increase the rigidity of the plate. Therefore, in the related art, not only the manufacturing cost of the enclosure increases, but also the size and weight are excessive, making it difficult to easily purchase and install the product in a general home.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a loudspeaker horn speaker enclosure having a similar size to the general hermetic enclosure and having the tone characteristics of the horn speaker.

It is another object of the present invention to provide a loudspeaker enclosure, which is mechanically structured and has low rigidity and low cost and is capable of using low weight and low cost materials.

Another object of the present invention is to provide a loudspeaker horn speaker enclosure which can adjust the tone to have a hermetic or mixed characteristic by artificially changing the tone balance.

The rear horn speaker enclosure of the present invention for achieving the above object, a pair of side plates constituting the outer case of the enclosure, a top plate located in the upper portion, a bottom plate located in the lower portion, a rear plate located in the rear, A speaker enclosure having a front baffle on which a speaker is mounted, the speaker plate being installed at the center of the inner side of the rear plate and a pair of sound wave plates which are installed at both sides of the fixing plate at regular intervals and are inclined toward the fixing plate. And an intermediate plate that is in close contact with an end upright inwardly of the fixed plate and the pair of sound boards to block a space, and is combined with a lower end of the intermediate plate to form an outlet and is in close contact with side plates of both side end portions to form an inlet. The two-layered top plate and the lower side of the two-layered top plate and the sound wave transmitted through the inlet side plate and sound Guided between plate and is further configured to exit the guide to form the outlet side for discharging the sound wave that has passed through the fixing plate and the negative dopant to the outside.

1 is a side cross-sectional view showing the structure of a conventionally used loudspeaker enclosure;

2 is a perspective view showing the basic shape of the horn used in FIG.

Figure 3 is a perspective view showing the basic form of the horn used in the present invention,

4 is a partial cutaway perspective view illustrating the structure of the loudspeaker enclosure of the present invention;

5 is an external perspective view of the loudspeaker enclosure of the present invention;

6 is a front view showing the installation state of the sound board of the loudspeaker enclosure of the present invention;

Figure 7 is a front view showing the installation state of the middle plate and the two-layered plate of the backwood horn speaker enclosure of the present invention.

≪ Description of Reference Symbols for Main Parts of Drawings >

10,30: enclosure, 12,36: bottom plate,

14,38: back plate, 16,32: top plate,

18,62: speaker, 20,42: sound board,

22,48: entrance, 24,52: exit guide,

26,54: exit, 34: side plate,

40: fixed plate, 44: intermediate plate,

46: two-layered top plate, 50: characteristics control device,

56,58: guide plate, 60: front baffle,

64: door.

Hereinafter, the backwood horn speaker enclosure of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is an enclosure for accommodating a speaker, and in particular, an enclosure capable of emphasizing bass in sound waves output to the rear of the speaker by forming a pair of trumpet-shaped horn structures on the rear of the enclosure.

Figure 3 is a perspective view of a horn structure showing the basic principle and structure of the enclosure of the present invention as described above, it can be seen that the pitch of the enclosure has the form of a double trumpet by a symmetrical structure and thus the pitch is further extended than the conventional one have. In addition, the sound waves introduced through the inlet 22 formed at the opposite positions have a structure that joins at the outlet 26 after advancing along other sounds extending horizontally toward the rear, and again extending vertically. The left and right two-way sound system has the effect of canceling the imbalance that may occur during sound wave progression. By artificially adjusting the sound wave transmission characteristics, the resonance characteristic unique to the horn can be alleviated. There is an advantage.

The basic structure of the speaker enclosure according to the present invention, as shown in Figure 3, is for passing the indirect wave output from the speaker installed in the upper front side is formed on both sides around the speaker, and the sound wave to the rear of the enclosure A pair of sound wave inducing means for guiding, a sound changing means for guiding sound wave from the bottom to the top, for changing the characteristics of sound wave induced by the sound wave guiding means, and sound wave passing through the sound changing means Sound wave output means for output to the outside.

Figure 4 is a partial cutaway perspective view showing the structure of one embodiment of the backdoor horn speaker enclosure 30 of the present invention manufactured on the basis of the basic principle as described above. As shown, a pair of side plates 34 constituting the outer case of the enclosure 30, a top plate 32 located at the upper end, a bottom plate 36 located at the lower end, and a back plate located at the rear ( 38) and a front baffle (not shown) to which the speakers are installed. In addition, the fixing plate 40 which is installed in close contact with the inner surface of the rear plate 38 and is installed at both sides of the fixing plate 40 at regular intervals, and is installed at an upper side toward the fixing plate 40. A pair of sound plate 42 inclinedly installed, an intermediate plate 44 in close contact with an upright free end surface of the fixed plate 40 and a pair of sound plate 42, and blocking the space; A two-layer plate 46 coupled to the lower end of the plate 44 to form an upper portion of the outlet 54 and closely contacting the side plates 34 of both side end portions to form an inlet 48; and the two-layer plate 46 It is installed on the lower side of the outlet for guiding the sound waves transmitted through the inlet between the side plate 34 and the sound guide plate 42 and also to discharge the sound waves passed through the fixed plate 40 and the sound guide plate 42 to the outside (54) The exit guide 52 constituting the side part is shown.

The top plate 32, the pair of side plates 34, the bottom plate 36 and the back plate 38 constitute the outer case of the enclosure 30, it can be configured using a conventional plate material. . On the inner surface of the rear plate 38 located at the rear of the enclosure 30, a fixing plate 40 for constituting the passage of sound waves, and a pair of phonograms having a symmetrical shape centering on the fixing plate 40 ( 42) is installed. The upper end of the fixed plate 40 is in close contact with the top plate 32 and the lower end is spaced apart from the bottom plate 38 by a predetermined distance. In addition, the upper end of the fixed plate 40 has a curved structure to facilitate the progress of sound waves. However, the lower end of the fixing plate 40 has a tapered end shape. In addition, it can be seen that the guide plate 58 having a curved shape is formed on the upper side where the top plate 32 and the pair of side plates 34 are in contact with each other. Although only one guide plate 58 is shown in the figure, it can be installed in a curved portion to smooth the refraction of sound waves, and is shown in detail in FIG. The sound wave (indirect wave) moves upward through the space formed between the sound wave plate 42 and the side plate 34 as indicated by the arrow, and then through the space formed between the sound wave plate 42 and the fixed plate 40. It moves downward. Note that the fixed plate 40 and the sound wave plate 42 are perpendicular to the surface of the back plate 38 to form a moving space of the sound wave. The structure of the fixed plate 40 and the sound plate 42 is described in detail with reference to FIG.

In fact, the fixed plate 40 and the sound wave plate 42 are blocked by the intermediate plate 44 to form a space in which sound waves can move. The lower end of the intermediate plate 44 is not in close contact with the bottom surface 36 is spaced a predetermined distance. The intermediate plate 44 is coupled at the end with a two-layered plate 46 which serves as a top plate for forming an outlet 54 through which the indirect wave is output, in addition to forming the traveling space of the indirect wave as described above. Although not shown, the speaker is provided on the upper side of the two-tiered plate 46. Although the right end incision surface 44a of the intermediate plate 44 is shown spaced apart from the side plate 34 in the figure, it should be apparent to those skilled in the art that the present invention should be in close contact with the side plate 34. will be. That is, the cut surface 44a is in close contact with the surface of the side plate 34.

On both sides of the two-layered plate 46, an inlet 48 through which sound waves flow is formed. The inlet 48 is not formed as a separate inlet, the two-layered plate 46 is in close contact with the pair of side plates 34 in a state in which portions of both side portions of the two-layered plate 46 are cut out. When the space is naturally formed using the configuration. Indirect waves output from a speaker (not shown) are incident through the inlet 48.

In addition, around the pair of inlets 48 may be further installed on one side or both sides of the characteristic adjusting device 50 as shown by the dotted line. The characteristic adjusting device 50 is a plate shape extending vertically surrounding the inlet 48, it is possible to adjust the frequency band incident to the inlet 48 by the characteristic adjusting device 50. In addition, it is apparent to those skilled in the art that the specific frequency band of the sound wave incident on the inlet 48 can be adjusted by adjusting the vertical length of the characteristic adjusting device 50.

A speaker (not shown) is positioned on an upper side of the two-layered upper plate 46, and a lower side forms an outlet 54 that outputs an indirect wave at a position opposite to the bottom plate 36. As described above, the indirect wave passing through the sound wave plate 42 and the fixed plate 40 is output to the outlet 54 after moving downward in the direction of the arrow. A guide plate 56 is also provided inside the outlet 54 for smoothly advancing indirect waves.

At the lower side of the inlet 48, an outlet guide 52 is also provided. In the present invention, the outlet guide 52 serves to guide the indirect wave input through the inlet 48 to the sound wave plate 42 and also constitutes the side surface of the outlet 54. For this purpose, the outlet guide 52 has a form in which the width thereof is narrowed toward the inner side.

FIG. 5 is a perspective view showing the appearance of the loudspeaker enclosure 30 of the present invention. The front baffle 60 is provided with a space for accommodating the speaker 62, and the front of the outlet 54. FIG. It can be seen that the hinge is coupled to a pair of doors 64 that can open and close the outlet. The door 64 can control the indirect wave output by opening one or all or closing all the doors as needed. That is, the enclosure of the present invention can be used as a closed enclosure by closing all the doors 64, and can be used as a loudspeaker horn speaker enclosure by opening all the doors 64. In addition, when the door 64 is fully opened, the door 64 is fixed perpendicularly to the outlet 54 surface to obtain an effect such that the length of the horn is extended.

6 and 7 are front views for explaining in more detail the structure of the loudspeaker enclosure of the present invention. 6 is a front view showing a fixed state of the fixing plate 40 and the sound wave plate 42 on the inner surface of the back plate 38, the upper end of the fixing plate 40 is connected to the ceiling (top plate) and the lower end is the bottom surface It can be seen that the distance from (36) a certain distance. In addition, the upper end of the fixed plate 40 is provided with a plurality of guide plates 58 so that the sound waves can proceed smoothly, the lower end is configured to have a tapered end portion in order to extend the progress of the sound. In the present invention, the fixed plate 40 and the sound plate 34 are formed on the back plate 38 that is most affected by the vibration caused by sound pressure, in addition to forming the direction of indirect wave propagation. Since the mechanical structure (the partition of the back plate is divided into small parts and the role of the reinforcing beam) acts as a lattice, the rigidity is increased, resulting in the use of light and thin plates.

Unlike the fixed plate 40, the lower end of the sound wave plate 34 extends to be in close contact with the bottom surface 36, and the upper end is spaced apart from the ceiling. Therefore, the indirect wave moves through the space separated on both sides and then merges on the lower side. Although not shown in detail, a sound is formed between the lower side of the sound plate 42 and the side plate 34, which is connected to the sound generated by the exit guide 52 and the side plate 34. It is explained in 7.

FIG. 7 further shows an intermediate plate 44 at the front projection end of the fixed plate 40 and the sound wave plate 42 in the state shown in FIG. 6, and a two-layered plate 46 at the lower end of the intermediate plate 44. It is a front view showing the state which became. Both the fixed plate 40 and the sound plate 42 are invisible because they are blocked by the intermediate plate 44 and the two-layered plate 46. On the inner surface of the intermediate plate 44, a plurality of ribs 44b are provided. The rib 44b acts to suppress standing waves of the intermediate plate 44 and also serves to reinforce the structure. On the lower side, it can be seen that the outlet guide 52 for forming the outlet 54 is installed on both sides. The outlet guide 52 is configured to gradually widen toward the rear from the portion exposed to the front. This type has a horn shape in which the outlet 54 is gradually widened, and at the same time, the space formed by the outlet guide 52 and the side plate 34 (62 in FIG. 4) is reversed to indirect wave output from the speaker. It also helps to pass the horn-type voice. In addition, the guide plate 56, which is the final refraction portion installed inside the outlet 54, is cornered with a plate made of metal so that the indirect wave is output without being absorbed.

Referring to FIG. 5 again, the front baffle 60 with the speaker 62 attached thereto is installed, and the door 64 is installed on the front of the outlet 54. In the operating state of the audio device, most of the sound is directly output sound waves through the speaker 62, the indirect wave output through the outlet 54 after moving along the sound tone according to the present invention is in the opening and closing state of the door 64 Thus the output is controlled. In other words, if the door 64 is kept closed, the loudspeaker enclosure of the present invention operates as an enclosed enclosure, and opening the door 64 will operate as a mixed enclosure. Therefore, the tone can be changed.

According to the present invention as described above has the size similar to the general hermetic enclosure, there is an advantage that can provide the tone and characteristics of the horn. In addition, the mechanical structure is excellent in rigidity, low-weight and cheap materials can be used, there is an advantage that the manufacturing cost is low and light weight. Moreover, there is an advantage that the tone can be adjusted to have a closed or mixed characteristic by artificially changing the tone balance.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications will belong to the appended claims. .

Claims (8)

(Correct) a pair of side plates 34 constituting the enclosure case, a top plate 32 located at the upper end, a bottom plate 36 located at the lower end, a back plate 38 located at the rear, and a speaker ( In a backward horn enclosure having a front baffle (60) to which 62 is installed, A fixed plate 40 which is installed in close contact with the inner surface of the rear plate 38, the upper end is in close contact with the top plate 32, and the lower end is spaced a predetermined distance from the bottom plate 36; A pair of sound plate which is spaced apart from the top plate 32 by a predetermined distance and the bottom portion is in close contact with the bottom plate 36 and spaced at regular intervals on both sides of the fixed plate 40 to be inclined toward the fixed plate 40 ( 42); An intermediate plate 44 in close contact with an end upright inwardly of the fixed plate 40 and the pair of sound wave plates 42 to block the space; A two-layered plate 46 coupled to the lower end of the intermediate plate 44 to form an outlet 54 and in close contact with the side plates 34 of both side end portions to form an inlet 48; And installed on the lower side of the two-layered plate 46 and guides the sound wave transmitted through the inlet 48 between the side plate 34 and the sound guide plate 42 and the fixed plate 40 and sound guide plate 42 An exit guide 52 for discharging the passed sound waves to the outside; (delete) According to claim 1, characterized in that the characteristic adjustment device 50 is installed on both sides or one side of the inlet 48 to change the tone characteristics of the indirect wave flowing through the inlet (48). Loudspeaker enclosure. 2. The loudspeaker enclosure of claim 1, wherein a pair of doors 64 are further installed at the outer end of the outlet 54 to control the output of the indirect wave by opening and closing the outlet 54. . 4. The method of claim 3, characterized in that the pair of doors (64) are hinged to both ends of the outlet (54) and are configured to extend the loudness of the outlet (54) by opening perpendicular to the outlet (54). Loudspeaker enclosure. 2. The loudspeaker enclosure according to claim 1, wherein the guide plate (56) provided at the inner end portion of the outlet (54) and the final refraction portion of the lower end portion connection portion of the fixing plate (40) is formed of a metal material. 2. The loudspeaker enclosure of claim 1, wherein the acoustic wave refraction portion is molded to prevent attenuation and attenuation at the portion where the indirect wave passing through the sound volume of the enclosure 30 is refracted. The backwood type according to claim 1, wherein a rib 44b for suppressing standing waves generated inside the intermediate plate 44 and further strengthening the structure is provided on the surface of the intermediate plate 44. Speaker enclosure.

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