JPH04165797A - Speaker equipment and television receiver using same - Google Patents

Abstract

PURPOSE:To improve productivity by letting a horn part with integrally moldable configuration and a buffle plate constitute, in two piece, an acoustic tube with complicated configuration. CONSTITUTION:An acoustic tube in front of a speaker 1 is constituted of a horn part 11 with integrally moldable construction, having a reflection board 12 for acoustic characteristic correction and a rib 14 for acoustic tube reinforcement, and a buffle plate 15 having a hole 7 for leading a sound wave reproduced by a speaker 1 and an acoustic lens 5 for acoustic characteristics correction. Further, the acoustic tube is constituted in a manner that it can be commonly fixed to the speaker 1 and the horn part 11 of the buffle plate 15 and that it can be assembled in the same direction. Thus, the productivity of acoustic tubes can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a speaker device in which an acoustic tube for guiding sound waves is arranged on the front surface of the speaker.

Conventional technology The method of installing a horn or acoustic tube on the front of a speaker and guiding the sound waves generated from the speaker to the opening has the advantage that a higher output sound pressure can be obtained than when the horn or acoustic tube is not used, and that It has the advantage that sound can be transmitted in the direction of
Traditionally, it has been widely used.

A conventional speaker device using an acoustic tube will be described below with reference to the drawings.

FIG. 5 is a conceptual diagram of the structure of a television receiver incorporating the above speaker device. In FIG. 5, 1 is a speaker, 2 is an acoustic tube to which the speaker 1 is attached, 3 is a television cabinet, and 4 is a cathode ray tube. First, the operation of a television receiver incorporating a speaker device using the acoustic tube 2 configured as described above will be described. As shown in FIG. 5, a speaker device in which an acoustic tube 2 for guiding sound waves is arranged in the front part of the speaker 1 is built in along the cathode ray tube 4 inside the television receiver, and a television cabinet 3
By arranging the structure along the speaker device,
This allows television receivers to be made smaller and slimmer.

FIG. 6 is a conceptual structural diagram showing the configuration of the conventional speaker device. In FIG. 6, 5 is an acoustic lens provided on the front surface of the speaker 1, 7 is a hole for guiding the sound waves emitted from the speaker 1 to the acoustic tube 2, and 6 is a reflection hole provided on both sides of the hole 7. The plate 9 is a sound absorbing material, and the acoustic tube 2 is a combination of an acoustic tube panel 8 and an acoustic tube cover 10, which constitute the majority of the acoustic tube, in the direction A.

The operation of the speaker device configured as described above will be described below.

The acoustic lens 5 and the reflection plate 6 placed on the front side of the speaker 1 are for improving the high-frequency characteristics of the speaker device, and the sound absorbing material 9 inserted on both sides of the reflection plate 6 is inside the acoustic tube 2. This is to suppress the standing waves that occur. The acoustic tube 2 is configured such that its area is small at the front of the speaker and increases as it approaches the opening. The above structure will be explained using FIGS. 7 to 9. 7 is a sectional view taken along line BB in FIG. 6, FIG. 8 is a sectional view taken along line CC in FIG. 6, and FIG. 9 is a sectional view taken along line DD in FIG. 6.

The structure of the acoustic tube 2 is shown in FIGS. 7 to 9. In FIG. 7, the sound guide section has a structure that constitutes a nearly uniform space from the front of the speaker to the opening, and in FIG. The sound absorbing material 9 is inserted into a large space on the speaker mounting side. Further, in FIG. 9, the acoustic section is configured to gradually increase in size from the front surface of the speaker to the opening.

Problems to be Solved by the Invention However, in the conventional configuration described above, the structure of each part inside the acoustic tube 2 is complicated, so the acoustic tube 2 is constructed as an integral structure by means such as integral molding. Therefore, as shown in FIG. 6, the acoustic tube panel 8 and the acoustic tube cover 10 had to be divided into two parts. However, in order to attach the acoustic tube cover 10, it was necessary to take into account the internal resonance of the acoustic tube 2 and to ensure sufficient strength. Therefore, there was a problem in that the manufacturing cost increased.

The present invention solves the above-mentioned conventional problems, and improves productivity by constructing an acoustic tube with a complicated structure into two pieces: a horn part and a baffle plate that can be integrally molded. It is an object of the present invention to provide a speaker device that can achieve the desired performance.

Means for Solving the Problem In order to solve this problem, the speaker device of the present invention has an acoustic tube that guides sound waves, the opening of which is elongated and has a shape close to a rectangular shape, arranged in front of the speaker. The inside of the tube has a small area at the front of the speaker and an area that increases as it approaches the opening to guide the sound waves emitted from the speaker. The reflector and acoustic tube reinforcement ribs are installed perpendicular to the surface for speaker installation, and the horn part has a structure that can be integrally molded. The speaker is mounted in two pieces: a surface and a baffle plate with holes for guiding the sound waves reproduced by the speaker to the horn, and the sound waves generated inside the sound tube. Sound-absorbing materials for removing standing waves are inserted on both sides of the reflecting plate provided inside the horn section, and the baffle plate and the mounting plate of the speaker to the horn section are configured to be able to be fastened together. Moreover, the structure is such that the horn section, sound absorbing material, baffle plate, and speaker can be assembled from the same direction.

Effect With this configuration, even in a speaker device that has a horn or sound tube with an elongated rectangular opening in consideration of integration into equipment, the sound tube placed in front of the speaker can be used as a reflector for correcting acoustic characteristics. and a horn portion having ribs for reinforcing the sound tube and configured to be integrally molded;
It is comprised of a baffle plate having holes for guiding sound waves reproduced by the speaker to the horn part and an acoustic lens for correcting acoustic characteristics, and further, the acoustic tube is connected to the speaker.

The baffle plate can be attached to the horn part together, and
By adopting a configuration that allows assembly from the same direction, productivity of the acoustic tube can be improved.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

Note that the same reference numerals as those in FIGS. 5 to 9 indicate the same parts.

FIG. 1 is an exploded perspective view showing the structure of a speaker device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the structure of the speaker device according to an embodiment of the present invention shown in FIG. It is.

In FIGS. 1 and 2, reference numeral 11 denotes a horn section configured to be integrally molded, and this horn section 11 has a reflection plate 12 for correcting acoustic characteristics inside, and a hole 13 for inserting a sound absorbing material. and rib 1 for reinforcing the acoustic tube shown in Fig. 2.
It has 4. Reference numeral 15 denotes a baffle plate, which directs the sound waves emitted from the acoustic lens 5 and the speaker 1 to the horn section 11.
Hole 7 for guiding the horn and screw hole 1 for mounting to the horn part.
6 and the speaker 1 are configured to have a plurality of screw holes 17 for attachment. Further, 18 is a sound absorbing material, and 19 is a screw for attaching the speaker 1 and the baffle plate 15 to the horn.

The detailed configuration and operation of the speaker device of the present invention configured as described above will be explained with reference to FIGS. 1 and 2.

The horn part 11 has an elongated opening that is almost rectangular in shape, and inside thereof a reflecting plate 12 and reinforcing ribs 14 are provided in a direction perpendicular to the surface to which the speaker 1 is attached, and can be integrally molded. As shown in FIG. 1, the mold is divided at the arrow E section and the mold is slid up and down to perform molding. In the horn section 11 configured as described above, a reflecting plate 12 is provided inside the horn section 11 with a sound absorbing material 18 for removing standing waves generated inside the acoustic tube.
After the baffle plate 15 and the speaker 1 are inserted into both sides of the speaker 1, the baffle plate 15 and the speaker 1 are fastened together using screws 19. In addition,
20 is a hole provided in the horn portion 11 for screw tightening.

As described above, the speaker device of the present invention is configured such that the sound wave radiated from the speaker 1 is guided so that the acoustic area of the opening is larger than the acoustic area of the front surface of the speaker 1, and By configuring the horn section 11 constituting the acoustic tube into a structure that can be integrally molded, it is possible to realize a speaker device that has sufficient strength against internal resonance of the acoustic tube. Sound distortion caused by internal resonance and the like can be significantly reduced, making it possible to achieve excellent acoustic characteristics.

In addition, the baffle plate 15 and the horn portion 11 of the speaker 1
The horn part 11. is configured to be attached to the horn part 11. Sound absorbing material 18. Baffle plate 15. By configuring the speaker 1 so that it can be assembled from the same direction, it is possible to improve the productivity of the acoustic tube.

Furthermore, as shown in FIG. 3, when a speaker device made of the sound tube structure of the present invention is built into a television receiver,
Since the horn part 11 is integrally molded, the dimensional accuracy of the sound tube tip is improved, so it is possible to set the clearance dimension F to the minimum when installing the speaker 1 to the TV cabinet 3. This reduces the amount of sound coming from the back of the speaker, making it possible to enhance the bass sound.

FIG. 4 shows a comparison between the sound pressure-frequency characteristics of a speaker device made by a conventional method and the sound pressure-frequency characteristics of a speaker device made of the acoustic tube structure of the present invention.

By configuring the speaker device of the present invention as described above, it is possible to achieve excellent acoustic characteristics that could not be obtained with conventional products, and furthermore, by incorporating it into a television receiver, A television receiver that can be easily made smaller and slimmer and more reliable, and that can also improve assembly workability and significantly reduce assembly man-hours. It is.

Effects of the Invention As described above, in the present invention, an acoustic tube that guides sound waves is arranged in the front surface of the speaker, and the opening is elongated and has a nearly rectangular shape. The sound tube is small and approaches the opening (accordingly, the area becomes large) to guide the sound waves radiated from the speaker, and the acoustic tube also has a reflection plate for correcting acoustic characteristics and a reinforcement plate for reinforcing the acoustic tube inside. The rib is installed in a direction perpendicular to the surface for mounting the speaker, and has a horn part configured to be integrally molded, and has a plurality of screw holes for mounting to the horn part and a plurality of screw holes for mounting the speaker. In addition, the speaker is mounted in two pieces: a surface and a baffle plate with holes for guiding the sound waves reproduced by the speaker to the horn section, and a sound absorbing plate for removing standing waves generated inside the acoustic tube. The material is inserted into both sides of the reflective plate provided inside the horn section, and the structure is such that the baffle plate and the speaker can be attached together to the horn section, and the horn section, the sound absorbing material, and the baffle By adopting a configuration that allows the plates and speakers to be assembled from the same direction, it has sufficient strength against acoustic tube internal resonance, etc., and the speaker device made of the acoustic tube structure of the present invention can be used in televisions. By incorporating it into the receiver, it becomes possible to enhance the bass sound and realize excellent acoustic characteristics.

In addition, it not only makes it easy to make the television receiver smaller and slimmer, it also makes it possible to create a highly reliable television receiver.Furthermore, it improves assembly workability and reduces assembly man-hours. This enables a significant reduction.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the configuration of a speaker device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the configuration of the speaker device according to an embodiment of the present invention shown in FIG.
Fig. 3 is a structural conceptual diagram of a television receiver incorporating a speaker device using the acoustic tube of the present invention, and Fig. 4 is a structural conceptual diagram of a television receiver incorporating a speaker device using the acoustic tube of the present invention. Sound pressure-frequency characteristic diagram; Figure 5 is a structural conceptual diagram of a television receiver incorporating a conventional sound tube-based speaker system; Figure 6 is a structural structural conceptual diagram of a conventional sound tube-based speaker system; Figure 7 is a cross-sectional view taken along line B-B in Figure 6, Figure 8 is a cross-sectional view taken along line C-C in Figure 6, and Figure 9 is a cross-sectional view taken along line D-D in Figure 6.
FIG. 1...Speaker, 11...Horn part,
12... Reflection plate, 13... Hole for inserting sound absorbing material, 14... Rib for reinforcement, 15...
... Baffle plate, 16.17 ... Screw hole, 18
...Sound absorbing material, 19...Screw, 20...
...Hole for tightening screws. Name of agent: Patent attorney Haruaki Koebi (2 persons) Figure 1
/-Speaker 15-Bar 1, 2 full gear/L-Horn part 16.17-Screw hole/2-Reverse j
'+ version p-dumb sound 13- sound-absorbing material IQ-dossaiya8n1

Claims (4)

[Claims] (1) An acoustic tube that guides sound waves is placed in front of the speaker, with an elongated opening shaped into a nearly rectangular shape. The sound tube is configured to guide the sound waves emitted from the speaker so that It has a horn section that can be installed in the horn section and can be integrally molded, and a plurality of screw holes for attaching to the horn section and screw holes for attaching the speaker. A speaker device consisting of a two-piece baffle plate and a baffle plate having holes for guiding the sound to the horn section. (2) The speaker according to claim 1, wherein the baffle plate and the speaker are configured so that they can be fastened together, and the horn unit, baffle plate, and speaker can be assembled from the same direction. Device. (3) Insert sound-absorbing material to remove standing waves generated inside the acoustic tube on both sides of the reflecting plate provided inside the horn section, and also move the horn section, sound-absorbing material, baffle plate, and speaker in the same direction. Claim 2 has a structure that allows assembly from
The speaker device described. (4) A television receiver incorporating the speaker device according to claim 1, 2 or 3.