JP5860295B2 - Double bass reflex speaker system - Google Patents

Description

  The present invention relates to a double bass reflex speaker system.

  2. Description of the Related Art Conventionally, in a speaker system in which a speaker unit is attached to an enclosure, a double bass reflex type speaker system is known in order to increase the sound pressure of a bass sound emitted from the speaker unit.

  In the conventional double bass reflex type speaker system, the enclosure is formed in a box shape with a plate of the same thickness, and the speaker unit is attached to the front surface of the enclosure, while the opening is formed on the rear surface of the enclosure. (See, for example, Patent Document 1).

JP 2001-333476 A

  However, in the conventional double bass reflex type speaker system, since the enclosure is formed of a plate having the same thickness, the resonance action of the bass is reduced.

  For this reason, in the conventional double bass reflex type speaker system, the sound pressure of the bass sound is lowered, and it is not possible to resonate from high to low sounds without a sense of incompatibility.

  Accordingly, in the present invention according to claim 1, in the double bass reflex type speaker system, the base is provided with a pair of soundboards having a thickness smaller than that of the base to form an enclosure, and the sound path hole is formed between the pair of soundboards. The internal space of the enclosure having a pair of soundboards is partitioned into a first acoustic space having a pair of soundboards and a second acoustic space, and a speaker unit provided in the first acoustic space The emitted bass sound is resonated inside the first acoustic space and the second acoustic space and is emitted from a duct hole provided in the second acoustic space.

Moreover, in this invention which concerns on Claim 1, the said 1st acoustic space or / and 2nd acoustic space decided to connect a pair of soundboards via a soul pillar.

  And in this invention, there exists an effect described below.

  That is, according to the present invention, in the double bass reflex type speaker system, the base is provided with a pair of soundboards having a thickness smaller than that of the base to form an enclosure, and the bass bar is provided with a sound path hole between the pair of soundboards. And dividing the internal space of the enclosure having a pair of soundboards into a first sound space and a second sound space having a pair of soundboards, and generating low sound emitted from a speaker unit provided in the first sound space. In the first acoustic space and the second acoustic space having a pair of soundboards, the first acoustic space and the second acoustic space are resonated and emitted from a duct hole provided in the second acoustic space. Since the bass can be resonated, the resonance action of the bass is large, the sound pressure of the bass can be increased, and the sound can be made rich and rich from high to low.

In particular, when a pair of soundboards are connected via the soul column in the first acoustic space or / and the second acoustic space, the pair of soundboards can be made to cooperate, and the resonance action of the bass can be reduced. It can be further increased.

The perspective view which shows the speaker system which concerns on this invention. FIG. FIG. FIG.

  The specific configuration of the speaker system according to the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 to 4, the speaker system 1 has a speaker unit 2 attached to a substantially box-shaped enclosure 3.

  The enclosure 3 is formed in a substantially vertically long rectangular box shape by attaching a pair of front and rear soundboards 5 and 6 to a vertically long box frame base 4.

  The base 4 has left and right side plates 7 and 8 each having a vertically long rectangular plate extending in parallel vertically with a space left and right, and is attached to the top plate 9 between the upper ends of the left and right side plates 7 and 8. A bus bar 10 as a partition plate is attached between the middle portions, and a bottom plate 11 is attached between the lower end portions of the left and right side plates 7 and 8. Reinforcing plates 12 and 13 are attached to the lower surface of the top plate 9 and the upper surface of the bottom plate 11. Note that the left and right side plates 7 and 8 may be formed by a single plate, or may be formed by adhering a plurality of plates, for example, by sticking a cross-cut plate and a wood plank.

  The bus bar 10 is formed with a rectangular sound path hole 14 penetrating vertically at the center, and a rectangular tubular duct 15 is attached around the sound path hole 14 upward. Note that the sizes of the sound passage hole 14 and the duct 15 are appropriately adjusted according to the user's preference and the like.

  In the bottom plate 11, a rectangular duct hole 16 penetrating vertically is formed in the center portion, and a rectangular tubular duct 17 is attached around the duct hole 16 upward. The duct 17 is inserted through a through hole formed in the reinforcing plate 13. The sizes of the duct hole 16 and the duct 17 are appropriately adjusted according to the user's preference and the like.

  In the enclosure 3, the top plate 9, the bus bar 10, and the bottom plate 11 are fixedly attached to the left and right side plates 7, 8 to form a strong box-shaped base 4. Soundboards 5 and 6 are installed.

  The soundboards 5 and 6 are formed in a thickness that is thinner than the thicknesses of the top plate 9, the bus bar 10, and the bottom plate 11 that constitute the base 4, so that the baseplate 4 can vibrate. The front soundboard 5 is curved in a convex shape toward the front center, and the rear soundboard 6 is curved in a convex shape toward the rear center.

  As a result, the enclosure 3 is provided with a pair of front and rear soundboards 5 and 6 having a thinner thickness than the base 4 on the base 4, and a bus bar having a sound path hole 14 between the pair of front and rear soundboards 5 and 6. 10 is provided, and an internal space of the enclosure 3 having the pair of front and rear soundboards 5 and 6 is separated by the bus bar 10 from the first and second acoustic spaces 18 and 2 having the pair of front and rear soundboards 5 and 6. It is divided into an acoustic space 19.

  In the first acoustic space 18, rectangular frame-shaped bus ribs 20 and 21 are attached between the pair of front and rear soundboards 5 and 6 with a space in the vertical direction.

Each of the bass ribs 20 and 21 has a soul column 22 and 23 extended in the front-rear direction between a rib portion in contact with the front soundboard 5 and a rib portion in contact with the rear soundboard 6. As a result, the pair of front and rear soundboards 5 and 6 are connected via the soul pillars 22 and 23 inside the first acoustic space 18.

  Further, a rectangular frame-shaped baffle support 24 is attached between the front center portions of the upper and lower bus ribs 20, 21, and a rectangular plate-like baffle plate 25 is attached to the front surface of the baffle support 24. The baffle plate 25 is formed with a circular hole 26 in the center, and the speaker unit 2 is attached. The baffle plate 25 is inserted through an opening formed in the front soundboard 5.

  A rectangular frame-shaped bus rib 27 is attached to the second acoustic space 19 between a pair of front and rear soundboards 5 and 6.

The bus rib 27 has a soul column 28 extended in the front-rear direction between a rib portion in contact with the front soundboard 5 and a rib portion in contact with the rear soundboard 6. Thus, the pair of front and rear soundboards 5 and 6 are connected via the soul column 28 in the second acoustic space 19.

  Legs 29 are provided at the bottom of the enclosure 3 to open the duct holes 16 in the bottom plate 11.

  The leg body 29 is provided with rectangular plate-like leg plates 30, 31, 32 on the left and right side portions and the rear portion of the duct hole 16 of the enclosure 3, and is supported on the upper ends of the left and right leg plates 30, 31 and the rear leg plate 32. Plates 33 and 34 are provided.

  As a result, the leg 29 emits the sound emitted from the duct hole 16 of the enclosure 3 by the left and right and rear leg plates 30, 31, 32 toward the front side.

  The speaker system 1 is configured as described above, and a pair of bass sounds emitted from the speaker unit 2 provided in the first acoustic space 18 are paired inside the first acoustic space 18 and the second acoustic space 19. The sound is resonated using the soundboards 5 and 6 and emitted from the duct hole 16 provided in the second acoustic space 19. Thereby, the speaker system 1 is a double bass reflex type.

  As described above, in the speaker system 1, the base 4 is provided with the pair of soundboards 5 and 6 having a thinner thickness than the base 4 to form the enclosure 3, and the pair of soundboards 5 and 6. The bus bar 10 having the sound path hole 14 is interposed therebetween.

  Therefore, in the speaker system 1 having the above-described configuration, bass can be resonated in the first acoustic space 18 and the second acoustic space 19 having the pair of soundboards 5 and 6, thereby increasing the resonance effect of the bass. Since the sound pressure of the bass can be increased, it is possible to produce a rich and reverberant sound from high to low.

The speaker system 1 has a configuration in which a pair of soundboards 5 and 6 are connected via soul pillars 22, 23, and 28 in the first acoustic space 18 and / or the second acoustic space 19.

Therefore, in the speaker system 1 having the above-described configuration, the pair of soundboards 5 and 6 can cooperate with each other by the action of the soul pillars 22, 23 and 28 that connect the pair of soundboards 5 and 6. It can be further increased.

  Furthermore, the speaker system 1 has a configuration in which the speaker unit 2 is attached to the base 4 via a baffle plate 25.

  Therefore, in the speaker system 1 configured as described above, it is possible to guide the bass generated from the speaker unit 2 to the inside of the enclosure 3 without disturbing the vibration of the cone paper of the speaker unit 2.

1 Speaker system 2 Speaker unit 3 Enclosure 4 Base
5,6 Soundboard 7,8 Side plate 9 Top plate 10 Bus bar
11 Bottom plate 12,13 Reinforcement plate
14 Sound passage hole 15 Duct
16 Duct hole 17 Duct
18 First acoustic space 19 Second acoustic space
20,21 bass rib 22,23 soul pillar
24 Baffle support 25 Baffle plate
26 Speaker hole 27 Bass rib
28 sound post 29 leg
30,31,32 Leg plate 33,34 Support plate

Claims (1)

In the double bass reflex type speaker system,
The inside of the enclosure having a pair of soundboards by providing a pair of soundboards having a thickness thinner than that of the base on the base to form an enclosure, and interposing a bus bar having a sound path hole between the pair of soundboards The space is partitioned into a first acoustic space having a pair of soundboards and a second acoustic space, and low frequencies emitted from a speaker unit provided in the first acoustic space are resonated inside the first acoustic space and the second acoustic space. The double bass reflex speaker system is characterized in that the first acoustic space or / and the second acoustic space are connected with a pair of soundboards via a soul column. .

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