JPH1023582A - Speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable acoustic frequency characteristic by providing a plurality of throughholes to a speaker guide rib so as to reduce the resonance caused by the speaker guide rib. SOLUTION: A boss 3 whose length matches the length of a machine screw to fix a speaker is projected in a buffle plate inner face 2 of a case 1 and the speaker is fixed to a tip of the boss 3 by a machine screw. A speaker guide rib 5 whose length is equal to the length of the boss 3 is provided cylindrically between the opening 4 of the buffle plate inner face 2 of the case 1 and a speaker sound hole. Thus, the sound emitted from the sound discharge port of the speaker is guided to the opening 4 of the buffle plate inner face 2 of the case 1. In this case, a plurality of throughholes 7 are provided to the speaker guide rib 5 to reduce the reflected sound from the speaker guide rib 5 to reduce the resonance caused by the speaker guide rib 5. Furthermore, a remarkable change in the frequency characteristic is not caused by the speaker guide rib 5 and a stable acoustic frequency characteristic is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device in a television receiver or the like.

[0002]

2. Description of the Related Art Conventionally, when a speaker is directly mounted on a housing of a television receiver with screws, in order to prevent a boss corresponding to the length of the screw for mounting the speaker from the housing from protruding outside the housing, FIG. As shown in the exploded perspective view of the baffle structure of FIG.
Boss 3 of the length corresponding to the length of the screw fixing the speaker
At the end of the boss 3 (not shown).
Is fixed with screws (not shown), in which case,
Since the speaker is attached to the tip of the boss 3 and a gap is formed between the opening 4 of the inner surface 2 of the baffle plate of the housing 1 and the sound emission port of the speaker, the speaker guide rib 5 corresponding to the length of the boss 3 is provided. One provided in a cylindrical shape between the opening 4 of the inner surface 2 of the baffle plate of the housing 1 and the sound emission opening of the speaker, and guiding the sound emitted from the sound emission opening of the speaker to the opening 4 of the inner surface 2 of the baffle plate of the housing 1. It is. Reference numeral 6 denotes a metal or molded resin speaker grill provided in the opening 4 of the baffle plate inner surface 2 (see Japanese Patent Application Laid-Open No. 64-891).

[0003]

However, in the above-mentioned conventional speaker device, the speaker guide ribs 5 form a hermetically sealed dome with the speaker attached, and transmit sound output. Since the speaker grill 6 made of metal or molded resin provided in the opening 4 of the inner surface 2 is a rigid body, the acoustic output of the speaker is reflected on its surface, and resonates with the sound reflected by the dome-shaped speaker guide rib 5. As a result, tube resonance occurs due to the length of the speaker guide rib 5, the sound is attenuated in the dome, and the original frequency characteristic of the speaker alone is significantly changed.

An object of the present invention is to solve the above-mentioned problems in the conventional speaker device, and an object of the present invention is to provide a speaker device in which resonance by a speaker guide rib is small.

[0005]

In order to solve the above-mentioned problems, a speaker device according to the present invention comprises a speaker guide rib provided between an opening of an inner surface of a baffle plate of a housing and a sound emission opening of the speaker. A hole is provided, and an auxiliary speaker guide rib is provided in the speaker guide rib to partition vertically and horizontally. The presence of the through hole and the auxiliary speaker guide rib makes it difficult for tube resonance itself to occur due to the speaker guide rib. As a result, the frequency characteristics do not change significantly, and stable acoustic frequency characteristics can be obtained.

[0006]

According to the first aspect of the present invention, a plurality of through holes are provided in a speaker guide rib provided between an opening of an inner surface of a baffle plate of a housing and a sound emission opening of a speaker. Even if a speaker grill is provided in the opening on the inner surface of the baffle plate by reducing as much as possible the sound reflected from the speaker guide rib of the sound output from the speaker by a plurality of through holes provided in the speaker guide rib, Resonance with the sound reflected from the speaker grill can be suppressed.

According to a second aspect of the present invention, there is provided a speaker provided with auxiliary speaker guide ribs for partitioning vertically and horizontally within a speaker guide rib provided between an opening of an inner surface of a baffle plate of a housing and a sound emission port of the speaker. Since the reflected sound is newly generated by the auxiliary speaker guide ribs, the reflected sound and the reflected sound by the speaker guide ribs cancel each other, so that occurrence of resonance can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is an exploded perspective view of a baffle structure of a speaker device according to Embodiment 1 of the present invention. The difference from FIG. 3 showing a conventional example is that a plurality of slit-shaped through holes are formed in a speaker guide rib 5. Since only the point 7 is provided and other points remain the same, the same parts as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

In the speaker device having the above structure, a plurality of slit-shaped through holes 7 provided in the speaker guide rib 5 are provided.
Thus, the sound reflected from the speaker guide rib 5 is reduced, and resonance does not occur with the sound reflected from the speaker grill or the like.

(Embodiment 2) FIG. 2 is an exploded perspective view of a baffle structure according to Embodiment 2 of the speaker device of the present invention. The difference from FIG. the auxiliary speakers guide ribs 8 in the interval of about lambda _1/4 in order to eliminate the resonance in the longitudinal direction of the acoustic waves of the wavelength lambda _1, which corresponds to the length of the speaker guide ribs 5 (hundreds Hz) arranged to partition vertically and horizontally Only the points are the same, and the other points are the same. Therefore, the same parts as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the speaker device having the above structure, the auxiliary speaker guide ribs 8 provided in the speaker guide ribs 5 so as to partition them vertically and horizontally generate a new reflected sound, and the phases of the reflected sound and the sound reflected by the speaker guide rib 5 are reversed. Thus, the resonance between the reflected sounds is eliminated.

In the second embodiment, the resonance at the wavelength λ ₁ (several hundred Hz) of the sound wave corresponding to the vertical length of the speaker guide rib 5 is eliminated. The resonance generated by the speaker guide rib can be attenuated by disposing the auxiliary speaker guide rib corresponding to the wavelength or the half wavelength, for example,
Eliminating the resonance at the wavelength λ ₂ of the sound wave corresponding to the length of the speaker guide rib 5 in the horizontal direction can also be eliminated as in the vertical direction only by changing the frequency of the resonance sound. As described above, the shape and position of the auxiliary speaker guide ribs 8 are determined by the shape and dimensions of the speaker guide ribs 5.

[0013]

As described above, according to the speaker device of the present invention, it is possible to reproduce a sound close to the original speaker characteristics by reducing the resonance caused by the speaker guide rib.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a baffle structure of a speaker device according to Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of a baffle structure of the speaker device according to Embodiment 2 of the present invention.

FIG. 3 is an exploded perspective view of a baffle structure of a conventional speaker device.

[Explanation of symbols]

 Reference Signs List 1 housing 2 inner surface of baffle plate 3 boss 4 opening 5 speaker guide rib 6 speaker grille 7 through hole 8 auxiliary speaker guide rib

Claims (2)

[Claims] 1. A speaker device in which a plurality of through holes are provided in a speaker guide rib provided between an opening on an inner surface of a baffle plate of a housing and a sound emission port of a speaker. 2. A speaker device in which auxiliary speaker guide ribs for partitioning vertically and horizontally are provided in a speaker guide rib provided between an opening on an inner surface of a baffle plate of a housing and a sound emission port of a speaker.