JPS635352Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a speaker equipped with an acoustic adjustment device, in which the adjustment part is attached to the back of the speaker, and its operating shaft protrudes to the front of the speaker cone through a through hole provided in the center pole of the speaker magnetic circuit. This allows for easy adjustment from the front of the speaker.

In conventional speaker devices of this type, the adjustment parts and their operation parts are either provided at a separate location from the speaker, or they are mounted on a hard panel b provided with sound guide holes a, as shown in Fig. 3.
A speaker was attached to the back of the speaker cone, and the sound adjuster C and its parts were fixed to the back of a hard panel b using the gap inside the speaker cone d, so that the control shaft penetrating the panel could be operated from the front. .
However, in such a configuration, the leader wire of the sound control device must be guided from the inside of the cone to the outside, which makes processing the leader wire troublesome, and the leader wire may vibrate and generate abnormal noise or may damage the cone. In addition, since the parts of the acoustic adjustment device or the printed board to which they are attached are located inside the cone, the vibrations from the cone are diffusely reflected, resulting in poor sound quality.In addition, it is difficult to install these parts on small speakers, and the front surface of the cone is difficult to install. However, in order to install the adjustment parts, a hard sound guide plate had to be used, which interfered with the natural radiation of sound waves and was not good for sound quality.

This invention solves the above-mentioned drawbacks, and an embodiment thereof will be described with reference to the attached drawings. is provided, and the operating shaft 6 of the acoustic adjuster 5 attached to the back surface of the speaker is inserted through the through hole 4 and projected to the front surface of the cone diaphragm 1.

The acoustic controller 5 consists of, for example, a main body operated by an operating shaft 6, a resistor 7, a printed board 8, etc., and is fixed to the rear surface of the speaker. The center pole 8 has a cylindrical body 10 provided with a communication hole 9 that communicates with the through hole 4.
is integrally connected to the center pole 3, and the operating shaft 6 further protrudes from the cylindrical body, and the operating shaft 6 can be operated directly or from the front surface of the speaker by attaching a suitable knob.

Note that the sound controller 5 may be either a rotary type or a push type.

According to this invention, the sound controller 5 is attached to the back of the speaker, and only the operating shaft 6 protrudes from the front of the speaker, making it easy to dispose of the leader wires, eliminating accidents such as noise caused by the leader wires, and the inside of the cone. The presence of the cylindrical body 10 in the center eliminates any adjusting parts that would cause diffuse reflection of sound waves, so there is no deterioration in sound quality, and a flexible cloth with good acoustic effects can be used in front of the speaker. The adjuster can be easily attached to even small speakers.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a longitudinal side view, FIG. 2 is a front view, and FIG. 3 is a longitudinal side view of a conventional front-adjustable speaker. 1...Speaker cone, 3...Center pole, 4...Through hole, 5...Sound adjuster, 6...Operation shaft.

Claims (1)

[Scope of utility model registration request] A speaker with an acoustic adjustment device, characterized in that an operating shaft of an acoustic adjustment device attached to the back of the speaker projects to the front of the speaker cone through a through hole provided in a center pole of a magnetic circuit of the speaker.