JPH0787629B2 - Speaker device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. 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 a speaker.

2. Description of the Related Art A method in which a horn and an acoustic function are provided on the front surface of a speaker and a sound wave generated from the speaker is guided to the opening can provide a larger output sound pressure than when a horn or acoustic tube is not used. There is an advantage that the sound is transmitted in the direction of,
It has been widely used in the past.

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

FIG. 5 is a structural conceptual diagram 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 the television receiver incorporating the 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 on the front surface of a speaker 1, is installed along a cathode ray tube 4 inside a television receiver, and a television cabinet 3 is installed as described above. By making the structure along with the speaker device, it is possible to make the television receiver compact and slim.

FIG. 6 is a structural conceptual 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 wave emitted from the speaker 1 to the acoustic tube 2, and 6 is a reflection provided on both sides of the hole 7. A plate, 9 is a sound absorbing material, and the acoustic tube 2 is an acoustic tube panel 8 and an acoustic tube cover that constitute most of the acoustic tube.
10 and 10 are combined in the direction of A.

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

The acoustic lens 5 and the reflection plate 6 provided on the front surface of the speaker 1 are for improving the high frequency characteristics of the speaker device, and the sound absorbing materials 9 inserted on both sides of the reflection plate 6 are inside the acoustic tube 2. This is to suppress the standing wave generated in the. The acoustic tube 2 is configured such that the front surface of the speaker has a small area and the area increases as it approaches the opening. The structure will be described with reference to FIGS. 7 to 9. 7 is a sectional view taken along the line BB of FIG. 6, FIG. 8 is a sectional view taken along the line CC of FIG. 6, and FIG. 9 is a sectional view taken along the line DD of FIG. As shown in FIGS. 7 to 9, the structure of the acoustic tube 2 is such that in FIG. 7, the sound conducting portion forms a substantially uniform space from the front surface of the speaker to the opening, and in FIG. As a portion for inserting the sound absorbing material 9, the speaker mounting side has a large space. Further, in FIG. 9, the acoustic portion is configured so as to become gradually larger from the front surface portion of the speaker to the opening portion.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional configuration, since the structure of each part inside the acoustic tube that constitutes the acoustic tube 2 is complicatedly configured, the acoustic tube 2 is integrally formed by means such as integral molding. Therefore, as shown in FIG. 6, the acoustic tube panel 8
And the sound tube cover 10 had to be divided into two parts. However, in order to mount the acoustic tube cover 10, it was necessary to join the acoustic tube 2 so as to have sufficient strength in consideration of the internal resonance of the acoustic tube 2. Therefore, there is a problem that the manufacturing cost increases.

The present invention solves the above-mentioned conventional problems, and improves productivity by constructing an acoustic tube having a complicated structure with two pieces of a horn portion and a baffle plate configured to be integrally molded. An object of the present invention is to provide a speaker device that can be designed.

Means for Solving the Problem In order to solve this problem, the speaker device of the present invention has an acoustic tube arranged on the front surface of the speaker for guiding a sound wave having an elongated opening and a substantially rectangular shape. The inside of the tube is configured to conduct sound waves radiated from the speaker such that the area of the front surface of the speaker is small and the area is large toward the opening. Further, the acoustic tube is internally provided for correcting acoustic characteristics. A horn part having a structure in which a reflector and a rib for reinforcing an acoustic tube are installed in a direction perpendicular to a mounting surface of the speaker to enable integral molding, a screw hole for mounting the horn part, and a screw for mounting the speaker. The acoustic tube includes a plurality of holes and a baffle plate having a mounting surface of the speaker and a hole for guiding a sound wave reproduced from the speaker to the horn. Sound absorbing material to remove standing waves generated inside can be inserted into both sides of the reflector installed inside the horn, and the baffle plate and speaker can be attached together to the horn. In addition, the horn portion, the sound absorbing material, the baffle plate, and the speaker can be assembled from the same direction.

With this configuration, even in a speaker device having a horn or an acoustic tube with an opening having an elongated rectangular shape in consideration of incorporation into a device, the acoustic tube arranged in front of the speaker has a reflection plate for acoustic characteristic correction. And a horn portion having a rib for reinforcing the acoustic tube and configured to be integrally molded,
The horn is composed of a baffle plate having a hole for guiding a sound wave reproduced from the speaker and an acoustic lens for correcting acoustic characteristics, and the acoustic tube is fastened together with the speaker and the baffle plate attached to the horn part. By adopting a configuration that is possible and can be assembled from the same direction, the productivity of the acoustic tube can be improved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The same reference numerals as those in FIGS. 5 to 9 denote the same parts.

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

In FIG. 1 and FIG. 2, 11 is a horn portion configured so that it can be integrally molded. The horn portion 11 has a reflection plate 12 for acoustic characteristic correction inside and a hole for inserting a sound absorbing material.
13 and ribs 14 for reinforcing the acoustic tube shown in FIG. Reference numeral 15 denotes a baffle plate, which has a hole 7 for guiding the sound wave radiated from the acoustic lens 5 and the speaker 1 to the horn portion 11, a screw hole 16 for attaching to the horn portion, and a screw hole 17 for attaching the speaker 1. It is configured to have a plurality. 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 described with reference to FIGS. 1 and 2.

The horn portion 11 has an elongated opening and is formed in a shape close to a substantially rectangular shape, and a reflection plate 12 and a reinforcing rib 14 are provided inside.
Is provided in a direction perpendicular to the mounting surface of the speaker 1 and has a structure capable of integral molding. As shown in FIG. 1, a mold divided at an arrow E portion is slid up and down for molding. And In the horn unit 11 configured as above,
Sound absorbing material for removing standing waves generated inside the acoustic tube 18
After being inserted into both sides of the reflection plate 12 provided inside the horn portion 11, the baffle plate 15 and the speaker 1 are fastened together using screws 19. Reference numeral 20 is a screw fastening hole provided in the horn portion 11.

As described above, in the speaker device of the present invention, the sound conduction of the sound wave radiated from the speaker 1 is configured such that the acoustic area of the opening is larger than the sound conduction area of the front surface of the speaker 1, and By constructing the horn portion 11 constituting the acoustic tube into a structure that can be integrally molded, a speaker device having sufficient strength against resonance inside the acoustic tube can be realized. It is possible to significantly reduce the distortion of the sound generated by the internal resonance of the, and it is possible to realize excellent acoustic characteristics.

In addition, the baffle plate 15 and the speaker 1 can be attached to the horn portion 11 together so that they can be tightened together.
11, the sound absorbing material 18, the baffle plate 15, and the speaker 1 can be assembled from the same direction, whereby the productivity of the acoustic tube can be improved.

Further, as shown in FIG. 3, when a speaker device having the acoustic tube structure of the present invention is built in a television receiver,
Since the horn portion 11 is integrally formed, the dimensional accuracy with the tip end of the acoustic tube is improved, so that the clearance dimension F at the time of attachment to the TV cabinet 3 can be set to the minimum, and by extension, from the rear surface of the speaker 1. Since the sound that wraps around is reduced, it is possible to enhance the bass feeling.

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

By configuring the speaker device of the present invention as described above, it is possible to realize excellent acoustic characteristics not obtained with conventional products, and further, by incorporating it in a television receiver, A television receiver that can be easily miniaturized and slimmed down and can be a highly reliable television receiver. In addition, assembly workability can be improved and assembly man-hours can be significantly reduced. Is.

EFFECTS OF THE INVENTION As described above, according to the present invention, an acoustic tube for guiding a sound wave having an elongated opening and a shape close to a rectangular shape is arranged on the front surface of the speaker, and the inside of the acoustic tube has an area in the front portion of the speaker. Sound conduction of sound waves radiated from the speaker is configured so that the area becomes larger as it gets smaller and closer to the opening. Further, the acoustic tube has a reflection plate for acoustic characteristic correction and a rib for reinforcing the acoustic tube inside. The speaker is mounted in a direction perpendicular to the mounting surface of the speaker and has a structure capable of being integrally molded, a plurality of screw holes for mounting to the horn and a plurality of screw holes for mounting the speaker, and mounting of the speaker. Surface and a sound absorbing material for removing standing waves generated inside the acoustic tube as well as a two-piece structure with a baffle plate having holes for guiding sound waves reproduced from the speaker to the horn section Are inserted into both sides of a reflector provided inside the horn part, and the baffle plate and the speaker can be attached to the horn part together, and the horn part, the sound absorbing material, and the baffle plate are attached. Since the speaker can be assembled from the same direction, the speaker device has sufficient strength against resonance inside the sound tube and the speaker device having the sound tube structure of the present invention can be used for receiving a television. By incorporating it in the machine, it is possible to enhance the bass feeling and realize excellent acoustic characteristics.

In addition, it is possible to easily realize a compact and slim television receiver, and it is possible to obtain a highly reliable television receiver. Furthermore, assembling workability and assembling man-hours are reduced. It is possible to significantly reduce it.

[Brief description of drawings]

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 the 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 shows a speaker device incorporating the acoustic tube of the present invention in a television receiver. Fig. 5 is a sound pressure-frequency characteristic diagram, Fig. 5 is a structural conceptual diagram of a television receiver incorporating a speaker device using a conventional acoustic tube, and Fig. 6 is a structural conceptual diagram of a speaker device using a conventional acoustic tube. 7 is a sectional view taken along the line BB of FIG. 6, FIG. 8 is a sectional view taken along the line CC of FIG. 6, and FIG. 9 is taken along the line DD of FIG.
FIG. 1 ... Speaker, 11 ... Horn part, 12 ... Reflector, 13 ...
… Sound absorbing material insertion hole, 14 …… Reinforcing rib, 15 …… Baffle plate, 16,17 …… Screw hole, 18 …… Sound absorbing material, 19 …… Screw, 20 …… Screw tightening hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miho Konno 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References: Kaihei 2-64291 (JP, U): Shokai 60-145780 (JP, U) Actual Kaihei 1-78487 (JP, U)

Claims (3)

[Claims] 1. A loudspeaker for guiding a sound wave having an elongated opening and a shape close to a rectangle is arranged on the front surface of the speaker, and the inside of the acoustic tube has a small area on the front surface of the speaker and approaches the opening. Therefore, the sound guide of the sound wave radiated from the speaker is configured so that the area becomes large, and further, the acoustic tube has a reflection plate for acoustic characteristic correction and a rib for reinforcing the acoustic tube with respect to the mounting surface of the speaker. A horn part that is installed in the vertical direction and that can be integrally molded,
2 pieces of a baffle plate having a plurality of screw holes for attaching to the horn portion and a plurality of screw holes for attaching the speaker, and having a mounting surface of the speaker and a hole for guiding a sound wave reproduced from the speaker to the horn portion. A speaker device configured with. 2. The baffle plate and the speaker are attached to the horn part so that they can be tightened together, and the horn part, the baffle plate and the speaker can be assembled from the same direction. Speaker device. 3. A sound absorbing material for removing a standing wave generated inside an acoustic tube is inserted into both sides of a reflection plate provided inside the horn portion, and at the same time, the horn portion, the sound absorbing material, the baffle plate, and the speaker. The speaker device according to claim 2, wherein the speaker device can be assembled from the same direction.