JPH01135291A - Loudspeaker - Google Patents

Abstract

PURPOSE:To execute a low-sound reproduction with conventional amplifiers by fixing plural drivers to one diaphragm and equipping a cabinet with plural input terminals to drive the drivers independently of each other. CONSTITUTION:To voice coils 20a and 20b arranged in the voids of two porcelain circuits, independent signals are supplied from two input terminals, and one diaphragm 17 is driven. The signals are divided into the signal of a low sound and that of a high sound by using conventional amplifiers 6a and 6b, and the signals are supplied through cords 5a, 5b and 7a, 7b to intermediate- high-sound loudspeakers 2a-2b and 3a-3b and a low-sound loudspeaker 4. By such a constitution, without using mixing devices and amplifiers exclusive use for the low-sound loudspeaker, a 3D system can be realized, and a stereophonic feeling cannot be spoiled.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field 2 - The present invention relates to a speaker used as an audio output device, and particularly relates to a speaker having a novel driving method.

In order to improve the bass reproduction ability of conventional technology speaker systems,
In addition to the two-speaker system, there is a method of adding one more speaker for bass reproduction. This is called the 3D method and has been frequently used.

A conventional 3D speaker system will be described below with reference to the drawings.

FIG. 4 shows the wiring method of the above-mentioned 3D method.

In FIG. 4, 1a to 1C are cabinets, 21L to
2b is a midrange speaker, 3a to 3b are treble speakers,
4 is a bass speaker, 5a to 6C are audio signal current supply cords, and 6 to 7 are amplifiers.

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

A signal from a sound source such as a recording tape or a player (not shown) is amplified by an amplifier 6.7. The amplifier 3 to amplifier 6 is an amplifier for stereo reproduction and has a two-channel amplifier. The signal amplified by the amplifier 6 is applied to the left and right speakers through supply cords 5a to 5b. In order to further improve the bass reproduction ability, the signal amplified by the amplifier 7 is sent to the bass speaker 4 through the supply cord 5C.
is applied to

Mid- and high-frequency sounds greatly contribute to sound image localization during stereo playback, so two speaker systems are used, one on the left and one on the left.
Since bass sounds have little sense of direction, a method is used in which only one speaker system is added, as shown in FIG.

Problems to be Solved by the Invention However, in the above configuration, a new bass speaker system is used in order to improve the bass reproduction ability, but an amplifier is required to supply signals to the bass speaker system. 7, making it impossible to reproduce using only a conventional stereo reproduction amplifier.

In view of the above problems, the present invention uses a new speaker system for bass reproduction, but does not require a dedicated amplifier etc.
This provides a speaker that can reproduce bass sounds using a conventional amplifier.

Means for Solving the Problems In order to solve the above problems, the bass reproduction speaker system of the present invention includes a plurality of drive devices fixed to one diaphragm, and drives these drive devices independently of each other. The cabinet is equipped with multiple input terminals independently provided for this purpose.

Effect of the present invention With the above-described configuration, first, the audio signals of the left and right channels output from the conventional stereo reproduction □ amplifier are
The signals are input to the left and right speakers for middle and high frequencies, respectively, and are also input to two input terminals provided on the speaker for bass reproduction. The audio signal input to the input terminal drives a plurality of drive devices corresponding to each input terminal, and vibrates one diaphragm to which these drive devices are fixed. Therefore, the 3D system can be realized without requiring an amplifier or the like dedicated to a bass reproduction speaker as in the past.

Embodiment 6 A speaker system according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a structural sectional view of a bass speaker of a speaker system according to a first embodiment of the present invention.

In Fig. 1, 1C is a cabinet, 10 is a diaphragm,
11 is a frame, 12 is a damper, 13 is a voice coil, 14 is a magnetic circuit, 16a to 1eb are input terminals, 152
L~15b is a lead wire connecting the voice coil and the input terminal. Next, the operation will be explained. First, the voice coil 13 placed in the magnetic gap of the magnetic circuit 14 has two independent coils wound around one voice coil bobbin, and the driving force generated in the voice coil 13 can be input independently to the diaphragm 10. The configuration allows them to be driven simultaneously. As described above, according to the configuration of this embodiment, one diaphragm 1
0 can be simultaneously driven by independent signals.

FIG. 2 (d) shows a wiring diagram of each speaker and amplifier in this embodiment. In FIG. 2, go to 6.

1a to 1C are cabinets, 2a to 2b are medium tone speakers, 3a to 3b are high tone speakers, 4 are bass speakers, 5a to 5b are audio signal current supply cords, 6a to 6b
is an amplifier, 7a to 8 are supply cords to bass speakers, and 8a to 8b are duplexers.

The operation of the wiring method for the speaker system configured as described above will be described below.

The bass speaker 4 includes two input sections and is composed of one diaphragm. Amplifiers 6a-6b feed left and right channels, respectively. The outputs from the amplifiers 6a to 6b are divided into low frequency signals and medium to high frequency signals by splitters 8a to 8b, and the medium to high frequency signals are sent to the medium to high frequency speakers 2& to 2b and 3a to 3b by supply cords 6Δ to 5b. The signal is applied to the bass speaker 4 through the bass speaker supply cords 71L to 7b. Since the bass speaker 4 has two input terminals for one diaphragm, it is possible to simultaneously drive one diaphragm with mutually independent signals.

7. In this embodiment, the number of input terminals is two, but the same effect can be achieved even if a larger number of input terminals are used.

A second embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a structural sectional view of a second embodiment of the present invention. In Figure 3, 1C is a cabinet, 17
is a diaphragm, 18 is a frame, 19a to 19b are dampers, 20a to 20b are voice coils, 21a to 21b are magnetic circuits, 22'L to 22b are lead wires, 23a to 23b
is an input terminal.

The operation of the speaker configured as above will be explained below. Independent signals from two input terminals are supplied to the voice coils 20a to 20b arranged in the gaps between the two magnetic circuits, so that one diaphragm 17 can be driven. By connecting these bass speakers as shown in FIG. 1, a 3D system can be realized. In this embodiment, with the above-described configuration, it is possible to obtain exactly the same effects as in the first embodiment.

In the second embodiment, the magnetic circuits 21a to 21b and the voice coil 20! Although only two of each of L to 20b are shown, the same effect can be obtained by using a larger number of voice coils and connecting them in series, parallel, or series-parallel.

Effects of the Invention As described above, the present invention drives one diaphragm with a plurality of drive devices and provides a plurality of input terminals corresponding to each drive device, thereby producing a mixing device exclusively for bass speakers. This makes it possible to implement a 3D system without using an amplifier. Furthermore, since the sound waves in the low frequency range have long wavelengths, the sense of direction of the sound image cannot be felt.Even if this method is used, the stereo feeling will not be impaired.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a bass reproduction speaker according to a first embodiment of the present invention, FIG. 2 is a wiring diagram of each speaker and an amplifier according to the present invention, and FIG. 3 is a bass reproduction speaker according to a second embodiment of the present invention. FIG. 4, which is a sectional view of another embodiment of the speaker, is a wiring diagram of a conventional 3D speaker and an amplifier. 9 8-7 1a~1C...Cabinet, 2a~2b...
...Speaker for medium sound, 3a-3b...Speaker for high sound, 4...Speaker for low sound, 10...
...Diaphragm, 11...Frame, 12...
... Damper, 13 ... Voice coil, 14
...Magnetic circuit, 152L to 15b...
Lead wires, 16a-16b...Input terminals.

Claims (3)

[Claims] (1) One diaphragm, a plurality of drive devices fixed to the diaphragm, and a plurality of input terminals corresponding to the plurality of drive devices and for supplying independent signals to each drive device. A speaker characterized by: (2) The speaker according to claim 1, wherein the driving device is a voice coil. (3) one diaphragm, one or more voice coil bobbins fixed to the diaphragm, a plurality of voice coils wound around the voice coil bobbin, and each voice coil corresponding to the plurality of voice coils. A speaker characterized in that it is equipped with a plurality of input terminals for supplying independent signals to each.