JP2531646Y2 - Speaker system for bass reproduction - Google Patents

Description

[Detailed description of the invention] (A) Industrial application field This invention relates to a speaker system for bass reproduction having an acoustic tube.

(B) Problems to be Solved by Conventional Techniques / Inventions Hitherto, as shown in FIGS. 3 (a) and 3 (b), for example, low-pitched speaker systems have been known.

In FIG. 3 (a), 11 is an enclosure, 12 is a first vacant room provided in the enclosure 11, 13 is a second vacant room provided in the enclosure 11, and 14 is a first vacant room. Speaker unit, which is a driver unit,
Is a passive radiator provided in the empty room 13.

FIG. 3B shows another conventional example. In FIG. 3B, a speaker unit 16 serving as a driver unit and a bass reflex port 17 are further provided in the second empty room 13.

However, in the above-mentioned conventional ones, the first and second vacancies 12 and 13 are both required, and therefore,
There is a disadvantage that the enclosure 11 becomes large.

This invention has been made in view of the above points,
An object of the present invention is to provide a low-frequency sound reproduction speaker system which has solved the conventional disadvantages.

(C) Means for solving the problem The speaker system for bass reproduction according to the present invention comprises an acoustic tube continuously formed from the back of the speaker unit, an empty room provided on the front of the speaker unit, And a passive radiator provided in the empty room.

The resonance frequency of the passive radiator and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.

An acoustic tube formed continuously from the back of the first speaker unit; a vacant room provided in the front of the first speaker unit; an opening of the acoustic tube provided in the vacant room; And a second speaker unit provided in the room.

 Further, a bass reflex port is provided in the vacant room.

The resonance frequency of the port of the bass reflex and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.

(D) Operation According to the present invention, an acoustic tube continuously formed from the back of the speaker unit, an empty room provided on the front of the speaker unit, an opening of the acoustic tube provided in the empty room, Since a passive radiator or a speaker as a driver and a bass reflex port are provided in the empty space, two empty spaces are unnecessary as in the related art.

 For this reason, it is possible to reduce the size of the enclosure.

In particular, the acoustic tube can be provided outside the enclosure, so that the enclosure is smaller in this case.

When a passive radiator is used, the passive radiator is efficiently driven because the resonance frequency of the passive radiator and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.

When a speaker serving as a driver and a bass reflex port are provided in the vacant room, the resonance frequency of the bass reflex port and the frequency at which a half wavelength is placed on the acoustic tube are configured to be substantially the same. Powerful bass reproduction becomes possible in conjunction with the synergistic action of.

(E) Embodiment An embodiment of a speaker system for bass reproduction according to the present invention will be described with reference to FIG. 1 and FIG.

Embodiment 1 FIG. 1 is a sectional view of a speaker system according to a first embodiment.

In the figure, 1 is a speaker enclosure, 2 is a speaker unit, 3 is an acoustic tube formed continuously from the back side 2a of the speaker unit 2, 4 is a partition plate provided for forming the acoustic tube 3, 5 is a speaker unit 2 is a vacant room provided on the front surface 2b, 6 is a passive radiator provided in the vacant room 5, 7 is an opening of the acoustic tube 3, and the acoustic tube 3 and the vacant room 5 are connected by this opening 7. I have.

The resonance frequency of the passive radiator 6 is substantially equal to the frequency at which a half wavelength is applied to the acoustic tube 3.

In the bass reproduction speaker configured as described above,
The sound emitted to the front surface 2 b of the speaker unit 2 is guided to the empty room 5.

The sound emitted to the back side 2 a of the speaker unit 2 is guided to the opening 7 of the acoustic tube 3 via the acoustic tube 3.

Now, since the bass region near the frequency where a half wavelength is placed on the acoustic tube 3 of the bass reproduction speaker system has the opposite phase again in the opening 7, the sound emitted to the front surface 2b of the speaker unit 2 is The sound emitted to the back side 2a of the speaker unit 2 is guided to the empty room 5 in phase with the sound emitted to the rear side 2a, and the sound guided to the empty room 5 operates the passive radiator 6.

At this time, since the resonance frequency of the passive radiator 6 is substantially the same as the frequency at which a half wavelength is applied to the acoustic tube 3, the passive radiator 6 is driven most efficiently.

Since the empty room 5 and the opening 7 of the acoustic tube 3 are connected to each other, the acoustic tube 3 becomes equivalently longer when viewed from the acoustic tube 3, and equivalently becomes longer when viewed from the empty room 5. Since the volume of the vacant room 5 is increased, the reproduction band in the low-tone range is widened.

Of course, the acoustic tube 3 may be provided outside the enclosure 1.

As described above, the speaker system for bass reproduction according to the first embodiment includes the acoustic tube continuously formed from the back of the speaker unit, the vacant room provided in the front of the speaker unit, and the acoustic tube provided in the vacant room. And a passive radiator provided in the empty room.

The resonance frequency of the passive radiator and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.

Embodiment 2 FIG. 2 is a sectional view of a speaker system according to a second embodiment.

The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 8 denotes a speaker unit provided in the empty room 5, and 9 denotes a bass reflex port connecting the empty room 5 and the outside 10 of the enclosure 1.

The resonance frequency of the port 9 is substantially equal to the frequency at which a half wavelength is applied to the acoustic tube 3.

In the bass reproduction speaker configured as described above,
The sound emitted to the front surface 2 b of the speaker unit 2 is guided to the empty room 5.

The sound emitted to the back side 2 a of the speaker unit 2 is guided to the opening 7 of the acoustic tube 3 via the acoustic tube 3.

Now, since the bass region near the frequency where a half wavelength is placed on the acoustic tube 3 of the bass reproduction speaker system has the opposite phase again in the opening 7, the sound emitted to the front surface 2b of the speaker unit 2 is The sound emitted to the rear side 2a of the speaker unit 2 is guided to the empty room 5 in phase.

Now, since the speaker unit 8 is driven in a phase opposite to that of the speaker unit 2, the sound emitted to the vacant room 5 side of the speaker unit 8 is emitted to the front surface 2 b of the speaker unit 2. Be in phase with the sound.

Further, since a bass reflex type speaker system B including the empty room 5 and the port 9 is formed on the back side of the speaker unit 8, that is, on the front surface 2b of the speaker unit 2,
The low frequency range near the resonance frequency of the port 9 has a substantially opposite phase,
It is guided to the outside 10 of the speaker enclosure 1.

Therefore, the sound emitted to the front side of the speaker unit 8 and the sound in the vacant room 5 have the same phase, and the bass range is efficiently reproduced.

As described above, the low-frequency sound reproduction speaker system according to the second embodiment includes an acoustic tube formed continuously from the back of the first speaker unit, an empty room provided on the front of the first speaker unit, And the second speaker unit provided in the empty room.

 Further, a bass reflex port is provided in the vacant room.

The resonance frequency of the port of the bass reflex and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.

(F) Effect of the Invention According to the low-frequency sound reproduction speaker according to the invention, the enclosure can be miniaturized because it is configured as described above.

Further, since the resonance frequency of the passive radiator is substantially the same as the frequency at which the acoustic tube has a half wavelength, efficiency is improved.

When the passive radiator is replaced with a driver unit,
In this invention, the efficiency is further improved because the bass reflex port is provided in the vacant room, and the resonance frequency of the port of the bass reflex and the frequency at which a half wavelength is placed on the acoustic tube are substantially the same. .

In addition, it has excellent features such as simple structure and easy implementation because it can be configured at low cost.

[Brief description of the drawings]

1 and 2 show an embodiment of a speaker system for bass reproduction according to the present invention. FIG. 1 is a sectional view, and FIG. 2 is a sectional view showing another embodiment of the present invention. 3 (a) and 3 (b) are cross-sectional views showing a conventional embodiment. Explanation of main symbols 1: enclosure 2, 8: speaker unit 3: acoustic tube 4: partition plate 5: empty room 6: passive radiator 7: opening 9: port

Claims (5)

(57) [Scope of request for utility model registration] 1. An acoustic tube continuously formed from the back of a speaker unit, an empty room provided in the front of the speaker unit, an opening of the acoustic tube provided in the empty room, and an acoustic tube provided in the empty room. And a passive radiator. 2. The bass reproduction loudspeaker system according to claim 1, wherein the resonance frequency of the passive radiator is substantially the same as the frequency at which a half-wavelength is applied to the acoustic tube. 3. An acoustic tube continuously formed from the back of the first speaker unit, a vacant room provided on the front of the first speaker unit, and an opening of the acoustic tube provided in the vacant room. And a second speaker unit provided in the vacant room. 4. The speaker system for bass reproduction according to claim 3, wherein a bass reflex port is provided in the vacant room. 5. The loudspeaker system for bass reproduction according to claim 4, wherein the resonance frequency of the port of the bass reflex and the frequency at which a half wavelength is applied to the acoustic tube are substantially the same.