JPS60153294A - Speaker device - Google Patents

Abstract

PURPOSE:To obtain double low voices by providing a speaker and a voice coil driving magnet which is originally provided to the speaker, or an exciting body operated by a voice current which is attracted and repulsed by a separately installed magnet. CONSTITUTION:With the operation of a speaker, a voice current from an amplifire flows in an exciting oil 13 of an exciting body B, exterior and interior walls 10 and 11 of a housing 12 constituting the exciting body B become N and S magnetic poles, respectively, and flux 18 which changes alterately to N and S between both magnetic poles is generated. The flux 18 interferes magnetically leakage flux 19 coming out of a magnet 1 of a speaker A, and the exciting body B vibrates using a spring plate 15 as a fulcrum. As this vibration is generated by the coil 13 in the component of a low frequency band whose high frequency component is cut by the coil 13, its low band is faithfully taken out due to the synergistic effect of masses of the spring plate 15 and the exciting body B, and this vibration is transmitted to the speaker A, thereby obtaining double low voices.

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a speaker device ff that can reproduce deep bass even with a small speaker.

Needless to say, since a small speaker cannot produce as much amplitude as a large speaker, it has been considered impossible to reproduce deep bass sounds from the small speaker. Therefore, the present invention makes it possible to easily reproduce deep bass sounds from a small speaker using a simple configuration and an original idea.

The details of the embodiment will be described below with reference to the drawings.

This speaker (Al indicates a well-known external magnet type small speaker, in which both sides of a voice coil driving magnet (1) are sandwiched between a plate (2) and a ball yoke (3), and the center of the ball yoke (3) is (playing the ball part) [A ring-shaped magnetic gap (4) is completely formed between the hole edge of the center hole and the outer periphery of the pole part by loosely inserting it into the center hole of 11, and a diaphragm is attached to this cuff (4). This is a general form of this type of small speaker, in which a voice coil (7) wound around a bobbin (6) integrated with a voice coil (7) is inserted. (8) is a mounting base such as a speaker box or a wall plate.

Therefore, when the audio current from the amplifier (not shown) flows through the voice coil (7), the magnetic flux flows through the magnetic gap (4).
In the general operation of this type of speaker, the coil (7) moves in the axial direction, vibrates the diaphragm (5), and reproduces sound. be.

Therefore, the gist of the present invention is composed of the above-mentioned sub-cam) and an excitation body +Bl which is attracted and repelled by the voice coil drive magnet originally included in this speaker or a separately provided magnet, and this excitation body (B) or The purpose is to vibrate any of the speakers (AI) to obtain deep bass.

Therefore, first, use the voice coil drive magnet (1) to create an excitation body fil'! To describe a specific example of vibration, first, the structure of the excitation body fBl is a flat donut-shaped iron housing (121 And the main culprit is standing wall 0υ.

It is formed of an excitation coil (131) wound in a multi-layered manner between 09 and 131, and this excitation body fBl'l is coupled to the speaker (AI).

As a coupling means, a column (14) is installed in the center of the back of the ball yoke (3), and a circular spring plate (14) is attached to this column (04).
151 is fixed, and the above excitation body (Bl
i, rivet with the opening side facing the speaker) (+
They are suspended and connected at 61. Father above excitation coil (13
1, a common lead wire C171 from an amplifier (not shown) connected to the voice coil (7) is connected in parallel.

Therefore, the operation of the excitation body (Bl) is such that the audio current from the amplifier due to the previous speaker operation is transferred to the excitation coil (B) of the excitation body (B).
131 as well, thereby causing the excitation body (
The inner and outer walls of the housing Q2+ (10
1, (lυ becomes the N and S magnetic poles, and the N and S magnetic poles alternate between the two magnetic poles.
A fluctuating magnetic flux 08 is generated, and this magnetic flux 08 magnetically interferes with the leakage magnetic flux (11) from the magnet (1) of the sub-cam), so that the exciter fB1 vibrates with the spring plate 0 as the fulcrum. However, this vibration naturally occurs in the low frequency band component where the high frequency component is cut by the coil a3, and the low frequency band is reduced due to the synergistic effect of the spring plate (1) and the mass of the excitation body [Bl itself]. This vibration is faithfully extracted and transmitted to the sub-cam) through the support column 04), allowing it to be extracted as a deep bass sound.

In the above embodiment, the speaker (a separate magnet originally provided in Al) (/α) may be used exclusively.

Further, as shown in Fig. 27, the sub-cam) and the excitation body IB) may be separated and incorporated into a speaker box, etc. In this case, the sound pressure inside the box caused by the vibration of the excitation body (Bl), the spring plate 051.box The synergistic effect of the spring sound etc. makes it possible to reproduce deep bass sounds.

Furthermore, in the embodiment of the present invention, an example was shown in which the same signal as the audio signal to the sub-cam is input to the excitation body (Bl), but depending on the application, independent audio signals may be input to the speaker and the vibrating member separately. Of course, it is also possible to input the information.

Although not shown, in the above embodiments, the speaker operation side is fixed to the mounting base (8) and the excitation body (Bl side) is vibrated. It is also possible to fix it and make the speaker cam vibrate.

As described above, according to the present invention, a speaker assembly is constituted by a speaker and an excitation body that is attracted and repelled by a voice coil driving magnet that is originally included in each speaker or a separately provided magnet, and the excitation body or This is a very simple and unique idea that allows one of the speakers to vibrate, making it possible to reproduce heavy bass from a small speaker, which was previously considered impossible, and its features are significant.

Note that this speaker device is effective when used in various small-sized hand-held interlocking devices that move in time with rhythmic music.

[Brief explanation of the drawing]

The off-line view is a longitudinal front view, and the cross-section view is an enlarged view of the main parts of the same).
・Speaker, (1)...Magnet, (B)...Excitation body. Figure 1 Figure 5 IQ-Z Figure 4 Figure 7

Claims (1)

[Claims] It consists of a speaker and an excitation body that is operated by a voice current that is attracted and repelled by a voice coil drive magnet that the speaker originally has or a separately provided magnet,
A speaker device characterized in that either the excitation body or the speaker is supported so as to be able to freely vibrate.