JP2002291081A - Loud speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loud speaker system where a downsized cabinet remains without any modification and provision of a loud speaker with a large diameter can be recognized at a glance. SOLUTION: In the loud speaker system 1 where a barrier 13 partitions the inside of a cabinet 2 to form a loud speaker containing cavity 19 and a duct attached cavity 18 through which a sound emitted from a loud speaker 15 in the loud speaker containing cavity 19 is transmitted externally through cylindrical ducts 7, 11, a transparent member 10 is mounted to block a rear end of the duct 7, a cylindrical port section 11 is placed side by side so as to be orthogonal to the rear end of the duct 7 and the loud speaker can visibly be recognized through the duct 7 and the transparent member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker device, and more particularly, to a loudspeaker device, in which a transparent member is mounted so as to cover a rear end of a tubular duct, and a tubular member is provided so as to be orthogonal to the rear end of the duct. The present invention relates to a loudspeaker device in which a port portion is continuously provided so that the loudspeaker can be visually recognized at a glance from the outside via a duct and a transparent member, and the cabinet can be miniaturized.

[0002]

2. Description of the Related Art With the widespread use of broadband sources such as compact discs, there has been a demand for speaker devices capable of sufficiently reproducing wideband sources. In order to improve the low-frequency reproduction capability, conventionally, for example, a bass-reflex Kelton system has been used to improve the low-frequency reproduction capability.

[0003] A speaker emits sound toward the front and also emits sound toward the rear. Moreover, the phases of the sound waves before and after the speaker are opposite. Cone (diaphragm)
When moving forward, the air is compressed in the front and becomes dense, but in the rear, the air is attracted and the pressure drops, and when the cone returns in the opposite direction, it becomes dense. And the opposite situation. Therefore, sounds of opposite phases are produced before and after the speaker. When sounds of opposite phases are mixed, they cancel each other out and the volume is reduced. In particular, bass has low directivity and travels in various directions, so that the preceding and following sounds cancel each other. To prevent this, the sound before and after the cone must be separated so that they do not directly mix. For this purpose, a partition plate called a baffle is provided around the cone, and the rear of the partition plate is attached to the speaker box ( Cabinet).

FIG. 4 is a side sectional view of a bass reflex type speaker device. The bass reflex type speaker device 30 has a speaker 33 attached to a first sound output port 32a provided on a baffle plate 32 on the front surface of a cabinet 31. The second sound output port 32b is connected to a cylindrical port 35. The sound from the speaker 33 is directly radiated to the front of the cabinet 31 through the first sound output port 32a, and the sound generated from behind the speaker 33 into the cabinet 31 is resonated at the port 35, The bass is enhanced, the sound is indirectly radiated from the second sound output port 32b, and the sounds from both the sound output ports 32a and 32b are synthesized to expand the low frequency range.

In the case of the bass reflex system, as shown in FIG. 7, near the low-frequency limit, the phase of the sound output from the port 35 and the phase of the sound output from the woofer (here, the speaker 33) are positive. Although the sound pressure is increased, as the frequency gradually decreases, the sound of the woofer and the sound from the port section 35 become opposite in phase and cancel each other. Therefore, at a frequency lower than the resonance frequency fo of the woofer, the sound pressure drops sharply.

FIG. 5 is a side sectional view of a Kelton type speaker device. The speaker device 37 of the Kelton system is configured such that the inside of the cabinet 38 is separated from the first chamber 40 by
The speaker 42 is separated into a chamber 41
Is attached to the second chamber 41, and the port 43 is disposed in the second chamber 41. In the Kelton type speaker device 37, the direct sound from the speaker 42 and the sound resonated in the port 43 are mixed, and the port 43
, The sound from the speaker 42 and the sound from the port unit 43 have a positive phase at any frequency,
The sound pressure characteristic from the port section 43 becomes a low-frequency characteristic as it is, and reproduction can be performed up to a low frequency.

The Kelton type speaker device has the following advantages as compared with the bass reflex type speaker device. (1) The Kelton type can extend the low range by 60 to 70% compared to the bass reflex type. (2) Since the diameter of the port portion can be increased or shortened in theory, the occurrence of noise such as wind breaking is reduced. (3) The Kelton type can use a large-diameter speaker without increasing the size of the cabinet, and can incorporate a woofer.

FIG. 6 is a sectional side view of a bass-reflex type Kelton type speaker device. The speaker device 45 includes a baffle plate 47 on the front surface of the cabinet 46, in order from the top, an opening 47 a for the treble speaker 48, an opening 47 b for the middle sound speaker 49, and an opening 47 for the port 50.
c is open. That is, the treble speaker 48 is attached to the opening 47a of the baffle plate 47,
7b is provided with a mid-range speaker 49, and an opening 47 is provided.
A cylindrical port portion 50 is attached to c.

The high-frequency speaker 48 and the medium-frequency speaker 4
The rear of 9 is partitioned by a partition wall 52 extending vertically. The rear end of the port portion 50 penetrates the partition wall 52.

Behind the partition wall 52 of the cabinet 46,
A partition wall 53 is provided substantially parallel to the partition wall 52. The partition 53 is provided with an opening 53a corresponding to the diameter of the heavy bass speaker 55, and the heavy bass speaker 55 is attached to this opening 53a. Therefore, the first chamber 56 is defined by the partition 52, and the second chamber 56 is defined by the partition 53.
A chamber 57 and a third chamber 58 are defined.

The speaker device 45 having such a configuration
In this case, the high-frequency speaker 48 and the medium-frequency speaker 49 are mounted in a closed cabinet, and the opposite-phase sounds from the rear of the high-frequency speaker 48 and the medium-frequency speaker 49 are placed inside the first chamber 56. Because you ’re trapped and do n’t go outside,
No cancellation occurs. On the other hand, the heavy bass speaker 5
5 is to be mounted in a bass-reflex type Kelton type cabinet, and the direct sound from the heavy bass speaker 55 and the sound resonated at the port 50 are mixed in the second chamber 57,
Radiated from the port 50. Therefore, the phase of the sound from the bass speaker 55 and the sound from the port unit 50 are
At any frequency, the phase becomes a positive phase, and the sound pressure characteristic from the port section 50 becomes a low-frequency characteristic as it is. As shown in FIG. 8, reproduction can be performed up to a low frequency.

[0012]

By the way, in the above-described bass-reflex Kelton type speaker device 45,
To reduce the size of the speaker device,
Is located inside, so that the bass speaker 55 cannot be seen from the outside at all, and it is extremely difficult to determine that a bass speaker is provided from the outside.

For this reason, even a high-quality speaker device equipped with a bass speaker can be seen as a mere two-way speaker device in appearance. In fact, it is understood that the speaker device is provided with high sound quality.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a speaker device which can be seen at a glance as having a large-diameter speaker while keeping the cabinet compact.

[0015]

According to the speaker device of the present invention, the interior of the cabinet is partitioned by a partition wall.
In a speaker device having a speaker housing cavity and a duct-equipped cavity for radiating sound emitted from a speaker in the speaker housing cavity to the outside through a cylindrical duct, a transparent member is formed so as to cover a rear end of the duct. Is mounted, and a cylindrical port portion is continuously provided so as to be orthogonal to a rear end portion of the duct, so that the speaker can be visually recognized through the duct and the transparent member.

In the speaker device according to the present invention, the transparent member is mounted so as to close the rear end of the duct, and the cylindrical port is connected to the rear end of the duct at right angles. The speaker can be seen at a glance from the outside via the transparent member, and since the cylindrical port is connected so as to be orthogonal to the rear end of the duct, the conduit of the sound from the speaker becomes longer, The capacity required for the performance of the cavity with a duct can be secured, and the cabinet can be downsized.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a speaker device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side sectional view showing an example in which the present invention is applied to a Kelton type speaker device, and FIG. 2 is a front view thereof. As shown in FIGS. 1 and 2, the speaker device 1 is of a bass reflex type, and a baffle plate 3 serving as a duct mounting plate on the front of the cabinet 2 is provided with an opening 3 a for a loudspeaker 5 in order from the top, 7, a large-diameter circular opening 3b and an opening 3c for the mid-speaker 6 are provided. That is, the high-frequency speaker 5 is attached to the opening 3a of the baffle plate 3, the cylindrical duct 7 is attached to the large-diameter circular opening 3b, and the medium-tone speaker 6 is attached to the opening 3c. I have.

The rear of the high-tone speaker 5 and the middle-tone speaker 6 is partitioned by a partition 9 which is a third partition extending vertically. The duct portion 7 extends rearward through the partition wall 9. A transparent acrylic plate 10 which is a transparent member is fitted to the rear end of the duct portion 7 and
At the rear upper end, a cylindrical port portion 11 communicates and stands upright. That is, the port portion 11 communicates with the duct portion 7 in a state of being bent by 90 degrees.

An LED (light em), which is a light emitting means, is provided at an appropriate portion of the duct portion 7 where the transparent acrylic plate 10 is fitted.
An itting diode lamp 12 is provided. When the LED lamp 12 is turned on, the light of the LED lamp 12 is guided to the transparent acrylic plate 10 so that the entire transparent acrylic plate 10 shines. The transparent acrylic plate 10
However, it is needless to say that a colored transparent acrylic plate may be used.

Behind the acrylic plate 10 and the port portion 11 of the cabinet 2, the partition 1 is substantially parallel to the partition 9.
3 are provided. The speaker 1 for heavy bass is provided on the partition 13.
An opening 13a corresponding to the aperture 5 is opened, and a bass speaker 15 is attached to this opening 13a so as to face the transparent acrylic plate 10. Therefore, the first chamber 17 is defined by the partition 9 and the partition 9 and the partition 13
This defines a second chamber 18 that is a cavity with a duct, and the partition 13 defines a third chamber 19 that is a speaker storage cavity.

According to the present invention, the transparent acrylic plate 10 is mounted so as to cover the rear end of the
By connecting the cylindrical port portion 11 so as to be orthogonal to the rear end portion, the bass speaker 15 can be visually recognized at a glance from the outside via the duct portion 7 and the transparent acrylic plate 10, and Since the cylindrical port portion 11 is provided so as to be orthogonal to the rear end of the duct portion 7, the conduit of the sound from the heavy bass speaker 15 becomes longer, and the volume required for the performance of the second chamber 18 is reduced. Thus, the size of the cabinet 2 can be reduced.

In the loudspeaker device 1 having such a configuration, the treble speaker 5 and the mid-tone speaker 6 are mounted in a closed cabinet, and the treble speaker 5
And the opposite-phase sound from the rear of the middle-tone speaker 6 is confined in the first chamber 17 and does not go outside, so that no cancellation occurs. On the other hand, the heavy bass speaker 15 is mounted in a bass reflex type Kelton type cabinet, so that the direct sound from the bass bass speaker 15 and the port 11
And the sound resonated at the port section 1 are mixed in the second chamber 18 and the port section 1
1, the phase of the sound from the loudspeaker 15 for heavy bass and the phase of the sound from the port 11 become positive at any frequency, and the sound pressure characteristic from the port 11 remains unchanged. The characteristic is in the low frequency range, and reproduction up to a low frequency becomes possible.

At this time, since the port portion 11 is provided so as to be substantially parallel to the surface of the heavy bass speaker 15, the channel of the sound from the heavy bass speaker 15 becomes long, and the second room 1
The capacity required for the performance of the cabinet 8 can be secured, and the cabinet 2 can be downsized.

Since the bass speaker 15 can be seen from the front of the cabinet 2 through the transparent acrylic plate 10, the speaker device 1 is a three-way speaker system having the bass speaker 15 at a glance. I understand.

With the illumination of the LED lamp 12, the heavy bass speaker 15 can be lighted up, and the presence of the heavy bass speaker 15 can be further emphasized.

Next, a speaker device according to a second embodiment will be described. FIG. 3 is a side sectional view of the speaker device according to the second embodiment. In the speaker device 21 of the second embodiment, a cylindrical port portion 11 communicates with the rear end of the duct portion 7 in the cabinet 2 'and is vertically downwardly provided. The configuration is the same as that of the speaker device 1 according to the first embodiment. Therefore, an effect similar to that of the speaker device 1 according to the first embodiment is obtained.

In the above-described first and second embodiments, the three-way speaker device is used. However, the present invention is not limited to this, and it goes without saying that a two-way speaker device or a one-speaker device may be used. .

Although the port portion 11 extends upward or downward with respect to the duct portion 7, it is a matter of course that the port portion 11 may extend left and right or obliquely. Although the LED lamp 12 is used as the light emitting means, the present invention is not limited to this, and other light emitting means may be used, or the light emitting means may not be provided.

[0029]

As described above, according to the present invention,
A transparent member was attached so as to cover the rear end of the duct, and a cylindrical port was connected so as to be orthogonal to the rear end of the duct. Speaker can be visually recognized.

[0030] Since the cylindrical port portion is provided so as to be orthogonal to the rear end portion of the duct, the conduit of the sound from the speaker becomes longer, and the volume required for the performance of the cavity with the duct can be secured, and the cabinet can be used. The size can be reduced.

When the light emitting means is provided near the periphery of the transparent member, the speaker can be lit up by the illumination of the light emitting means, and the presence of the large-diameter speaker can be further emphasized.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of a Kelton type speaker device according to the present invention.

FIG. 2 is a front view of a Kelton type speaker device according to the present invention.

FIG. 3 is a side sectional view of a speaker device according to a second embodiment.

FIG. 4 is a side sectional view of a bass reflex type speaker device.

FIG. 5 is a side sectional view of a Kelton type speaker device.

FIG. 6 is a side sectional view of a conventional bass-reflex Kelton type speaker device.

FIG. 7 is a characteristic diagram showing an example of a sound pressure level and a frequency characteristic of a bass reflex type speaker device.

FIG. 8 is a characteristic diagram showing an example of a sound pressure level and a frequency characteristic of a bass-reflex Kelton type speaker device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2, 2 'cabinet 3 Baffle board (duct mounting plate) 5 High-frequency speaker 6 Medium-frequency speaker 7 Duct part 9 Partition wall 10 Transparent acrylic plate (transparent member) 11 Port part 12 LED lamp (light emitting means) 13 Partition wall 15 Speaker for heavy bass (speaker) 17 First room 18 Second room (cavity with duct) 19 Third room (speaker cavity) 21 Speaker device

Claims (5)

[Claims] 1. A speaker having a speaker housing cavity formed by partitioning the interior of a cabinet with a partition, and a duct-equipped cavity for radiating sound emitted from the speaker in the speaker housing cavity to the outside through a cylindrical duct. In the apparatus, a transparent member is attached so as to close a rear end of the duct, and a cylindrical port is connected to the rear end of the duct so as to be orthogonal to the rear end of the duct. A speaker device characterized in that a speaker can be visually recognized. 2. The speaker device according to claim 1, wherein the transparent member is colored. 3. The speaker device according to claim 1, wherein a light emitting unit is provided near the periphery of the transparent member. 4. The speaker according to claim 1, wherein a speaker for medium and high pitch sounds smaller in diameter than the speaker is mounted on a duct mounting plate of the cabinet, and a second partition is arranged behind the duct mounting plate. The speaker device according to any one of the preceding claims. 5. A high-frequency speaker is mounted above the duct of the duct mounting plate, a medium-tone speaker is mounted below the duct, and a third partition is arranged behind the duct mounting plate. The speaker device according to claim 1, wherein: