JPS6342626Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention aims to improve the deterioration of sound quality caused by the vibration of the cabinet plate material, particularly the reduction of low-frequency distortion, by reinforcing the cabinet.

In the past, attempts have been made to prevent deterioration of sound quality and reduction of bass by reinforcing the board material of the cabinet, but as shown in Fig. 1, this method involves fixing reinforcing bars 2 to the inner surface of the cabinet 1 and reinforcing the speaker. This is intended to prevent the outer panel of the cabinet 1 from vibrating due to the vibration of the air pressure inside the cabinet 1 due to the vibration of the speaker attached to the mounting hole 3 of the cabinet.

However, in order to prevent vibrations on each side of the cabinet 1, it is necessary to attach reinforcing bars 2 to each side, and since the reinforcing bars 2 themselves need to be strong, they need to have a large cross section. As the weight of 1 increases, the internal volume decreases, which hinders the reproduction of bass sounds.In addition, in order to effectively provide reinforcement with reinforcing bars 2, reinforcing bars 2 must be fixed at vibration mode points on each surface. There is a need,
There were drawbacks such as difficulty in finding the points.

The purpose of this invention is to provide effective reinforcement and eliminate the above-mentioned drawbacks of the conventional ribs by intersecting each other and connecting and fixing a plurality of ribs to the opposing surfaces of the inner surface of the cabinet. It is something to do.

Now, one embodiment of the present invention will be described with reference to FIGS. 2 and 3. A round board 5 having a speaker mounting hole 4 has several thin reinforcing ribs 6 in the horizontal direction.
The reinforcing ribs 6,
8 is connected by gluing, nailing, etc. at the intersection point.

Therefore, the vibration of the speaker attached to the mounting hole 4 propagates to each part of the cabinet, and tends to vibrate the buttful plate 5 and the back plate 7, which have a particularly large area, but the reinforcing ribs 6 and 8 do not meet the above-mentioned conditions at their intersection points. Because they are joined in the following manner, the full board 5 and the back board 7
The reinforcing rib 6 is used to prevent vibrations that bend in the transverse direction of the
However, the reinforcing ribs 8 act to prevent vibrations that bend in the longitudinal direction, thereby preventing the vibrations of the buttful plate 5 and back plate 7, thereby reducing the deterioration of sound quality due to these vibrations, especially This makes it possible to prevent bass distortion. Furthermore, since the spaces partitioned by the reinforcing ribs 6 and 8 communicate with each other, the internal volume within the cabinet does not decrease, and an increase in the minimum resonance frequency ₀ of the speaker can be suppressed.

Note that the reinforcing ribs 6 and 8 are joined together by providing a notch 9 as shown in FIG. 4 instead of using adhesive or nailing as in the previous embodiment, and inserting the mating rib into this notch 9 to further strengthen the connection. Alternatively, as shown in FIG. 5, a cushioning material 10 can be interposed to eliminate bumps and poor adhesion caused by small manufacturing errors. Furthermore, if the full plate 5, the back plate 7, and the reinforcing ribs 6, 8 are integrally molded from resin, mass production becomes possible at low cost.

In the present invention, opposing surfaces such as the buttful plate and the back plate are connected by ribs that intersect with each other and are connected at the intersection points, resulting in a strong cabinet that prevents vibration of the plate surface. , there is no cancellation due to the F characteristic due to phase inversion caused by plate vibration of the opposing surface, and deterioration of sound quality such as phase distortion is prevented.
In addition, the increased strength allows the cabinet plate to be made thinner, and together with the fact that the reinforcing ribs are thin, the weight of the cabinet can be reduced, and the internal volume can be increased even with the same external dimensions. In addition to being advantageous for reproducing bass sounds, the internal ribs reduce standing waves and eliminate the need for sound-absorbing materials, among other benefits.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional speaker cabinet with reinforcing ribs, Figs. 2 and 3 are front views and cross-sectional views of one embodiment of the present invention, and Fig. 4 is another example of the connection of reinforcing ribs. FIG. 5 is a perspective view of the embodiment, and FIG. 5 is a sectional view of another embodiment of FIG. 4...Speaker mounting hole, 5...Full plate,
6...Reinforcement rib, 7...Back plate, 8...Reinforcement rib,
9... Notch, 1... Cushioning material.

Claims (1)

[Scope of utility model registration request] A plurality of ribs are fixed to opposing surfaces inside the cabinet in directions that intersect with each other, and the intersecting ribs are connected at their intersection points, so that the spaces partitioned by the ribs communicate with each other. A speaker cabinet featuring: