JPS5848853Y2 - speaker cabinet - Google Patents

Description

[Detailed description of the invention] This invention has cylindrical bodies of the same shape and closed at the top and bottom by closing plates on the left and right sides of the back of the diaphragm, respectively, in the vertical direction.
This invention relates to a speaker cabinet in which an opening that communicates the sides of the left and right cylindrical bodies is formed in the center of the back of the diaphragm in a vertical direction perpendicular to the diaphragm, and the diaphragm of the speaker The sound emitted from the back of the diaphragm is divided into three equal parts to the left and right and guided in a spiral pattern in opposite directions, and the sounds of the same phase are collided with each other on the back of the diaphragm and are eliminated.

In conventional speaker cabinets, the sound emitted from the back of the diaphragm is repeatedly reflected within the cabinet, so to absorb this, the cabinet must be large and a considerable amount of sound-absorbing material must be used throughout the interior. However, after various experimental studies, the inventor of this invention divided the sound radiated from the back of the diaphragm into thirds to the left and right and created a spiral shape without reflecting it inside the cabinet. They came up with the present invention, which eliminates sound by guiding it and colliding the same phase sound on the back side of the diaphragm.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Cylinders 7 and 8 of the same shape and closed at the top and bottom by closing plates 4 and 5 are vertically formed on the left and right sides of the back surface 3 of the diaphragm 2 of the speaker 1, respectively. This is a speaker cabinet in which an opening 6 that communicates the left and right cylindrical bodies 7 and 8 is formed in the center of the back surface 3 of the diaphragm 2 in the vertical direction perpendicular to the diaphragm 2. is a sound absorbing material attached to the inner surface of the cylindrical bodies 7 and 8;
Reference numeral 10 denotes a fibrous material such as glass wool, or a sound absorbing material such as sponge or filter, which is filled in the cylindrical bodies 7 and 8, if necessary.

The speaker 1 applied to the present invention is Utility Model 54-1.
The plane vibration type described in Japanese Utility Model Publication No. 241 and Japanese Utility Model Application Publication No. 54-127537 is preferable, but a cone-shaped speaker may also be used, and if necessary, a plurality of speakers can be applied. are made of paper, plywood, metal, synthetic resin, etc.

Sound absorbing material 9 attached to the inner surfaces of the cylindrical bodies 7 and 8 as necessary
is a porous sheet such as sponge or felt, with bubbles or voids remaining if necessary, and impregnated with a rubber paint. This is to open an air vent hole 11.

12 is the net of speaker 1.

In the present invention, cylindrical bodies 7 and 8 having the same shape and closed at the top and bottom by closing plates 4 and 5 are formed in the vertical direction on the left and right sides of the back surface of the diaphragm 2, respectively, and the sides of the left and right cylindrical bodies 7 and 8 are An opening 6 communicating with the diaphragm 2 is placed in the center of the back surface 3 of the diaphragm 2.
This is a speaker cabinet formed in the vertical direction perpendicular to the diaphragm 2, which divides the sound A emitted from the back surface 3 of the diaphragm 2 into three equal parts to the left and right, and transmits each sound to the left and right cylindrical bodies 7 and 8. The sound is guided in a spiral shape B in the opposite direction along the inner wall surface, and the same phase sound is collided with the opening 6 of the back surface 3 of the diaphragm 2 to be erased. Since there is almost no reflection within the cylindrical bodies 7 and 8, the back pressure of the diaphragm 2 is not disturbed by reflected sound, and faithful reproduction can be obtained, and it is thinner and smaller than conventional ones. At the same time, the cylindrical bodies 7 and 8 can be made thin and lightweight.

Incidentally, if one or both of the sound absorbing materials 9 and 10 is applied to the cylindrical bodies 7 and 8, the sound absorbing effect can be further improved.

[Brief explanation of drawings]

Figure 1 is a front view, Figure 2 is a plan view, Figure 3 is the X in Figure 1.
- X-ray enlarged sectional view, FIGS. 4 and 5 are enlarged sectional views of other specific examples. 2...Diaphragm, 3...Back, 4,5.
...Closing plate, 6...Opening, 7,8...
...Cylindrical body.

Claims (1)

[Scope of utility model registration request] The same shape is provided on the left and right sides of the back surface 3 of the diaphragm 2, and the top and bottom are closed off plates 4,
Cylindrical bodies 7 and 8 closed by 5 are formed vertically, respectively, and an opening 6 that communicates the sides of the left and right cylindrical bodies 7 and 8 is provided in the center of the back surface 3 of the diaphragm 2. A speaker cabinet formed vertically perpendicular to the plate 2.