JPS60259100A - Vibrating device supported by plural parting and independent fluids - Google Patents

Abstract

PURPOSE:To obtain a diaphragm with high fidelity and excellent in sound quality by vibrating a vibrating element while using plural flexible sealing members such as magnetic fluids against a deflection torque of the vibrating element to support the vibrating element in isolating. CONSTITUTION:A diaphragm 2 is provided at the center of a bobbin 1, voice coils 3, 3' are wound at both ends of the bobbin 1 and they are incorporated so as to form the vibrating element. Then the voice coil 3 is placed between magnetic poles of a center pole 7 of a magnetic circuit 6 having a magnet 5 and a yoke 8 and the magnetic fluid 9 is placed so as to bury the part among the voice coil 3, the center pole 7 and the yoke 8. The magnetic fluid 9 is kept between the magnetic poles by a magnetic force and the distance between the vibrating element and the voice coil 3, the center pole 7, the yoke 8 is kept constant by the self-centering effect of the magnetic fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention isolates the vibrating element with a plurality of flexible sealing materials such as magnetic fluids that counter the pre-torque of the pickup element so that the vibrating element vibrates independently from the support system. The present invention is an isolated and independent multi-fluid support vibrating device that is characterized by being supported and vibrated while supporting the vibration device, and thereby it is possible to obtain a vibrating device such as a speaker with high fidelity and particularly excellent sound quality.

FIG. 1 shows an embodiment of the present invention, in which a diaphragm 2 is provided in the center of a bobbin 1, and voice coils 3, 3' are provided at both ends of the hobbin 1.
The voice coil 3 is inserted between the center ball 7 of a magnetic circuit 6 having a magnet 5 and the magnetic poles of the cork 8, and the voice coil 3, the center ball 7, and the yoke 8 are wound together to form a vibrating element 4. Insert the magnetic fluid 9 so as to fill the gap. The diaphragm 2 is a known speaker, and as shown in FIG. 4, the edge 10 is a box 11.
However, in the present invention, the edge 12 of the diaphragm is completely unsupported, and the diaphragm 2 is fixed to the diaphragm 2 from both sides via the magnetic fluid 9 to prevent the diaphragm 2 from tilting or writhing. This is a speaker supported by Mr.

The magnetic fluid 9 is a mixture of fine magnetic powder such as magnetite or ferrite and a diester solvent, dioctyl azelate.The solvent is selected from those with a high boiling point and a small amount of evaporation, and the magnetic fluid It is stored by magnetic force.

The distance between the voice coil of the vibrating element and the magnetic poles of the center ball and yoke is kept constant due to the self-centering effect of the magnetic fluid. In addition, since the inside of the bobbin 1 is sealed with magnetic fluid to form the air chamber 13, there is no need for a damper to support and dampen the bobbin and diaphragm as in conventional speakers, making it possible to reproduce the perfect original sound. In addition, as in the present invention, since the diaphragm is sandwiched and supported on both sides, there is no need to support the diaphragm edge, making it possible to have a large stroke, accurate and quick response, and improve the accuracy of original signal reproduction and efficiency in terms of human power. This is an incomparable improvement over known loudspeakers.

FIG. 2 shows another embodiment of the present invention, in which air passes through the center of the center ball 7 of the magnetic circuit of the above embodiment and branches into spaces 15 and 16 separated by a partition wall 14 in the bobbin 1. Holes 17 are provided, and air is fed into these from a compressor 19 through a pipe 1B, thereby preventing the bobbin 1 from coming into contact with the magnetic circuit 6, performing damping, and supporting the vibrating element 4. The air damping effect is performed by the partition wall 14 in the hobbin 1, and the spaces 14 and 16 in the hobbin are sealed by magnetic fluid so that no air escapes, which has the effect of making the compressor smaller.

In FIG. 3, a diaphragm 2 is provided at one end of the bobbin 1, the other end is supported by a magnetic circuit 6 and a magnetic fluid 9, and a magnetic pole 20 and a magnetic fluid 9 are provided between the magnetic circuit and the diaphragm. A supporting portion 21 is provided to support the bobbin 1 and form a sealed air chamber 22 within the bobbin, and the swing J plate etch becomes a downwardly downward end portion 23 which is inserted into a saucer 25 containing a fluid 24. Become.

5 and 6 are also examples of the present invention, in which the old diaphragm floats in the air and vibrates without using any air as shown in FIG. Two partition walls 26 and 27 are installed inside the bobbin to reduce the chamber formed by the center ball and control vibration damping.When no electrical signal is applied to the voice coil 3, the bobbin 1 is closed as shown in Figure 5. It has landed in the yoke 8, but when an electric signal enters the voice coil 3, the flux generated by the voice coil and the flux of the magnetic circuit 6 attract each other, so that the voice coil takes off and the bobbin 1 floats in the air. In this state, the bobbin vibrates in response to the input signal, and sound is emitted from the diaphragm.

In the present invention, since the voice coil is supported by a magnetic circuit and a plurality of cylindrical bodies via a plurality of magnetic fluids, the diaphragm can vibrate independently, and the temperature rise due to energization of the voice coil, that is, the rise in resistance value, can be suppressed, and the input resistance can be reduced. Improved and faithful sound reproduction can be performed.

Furthermore, due to the self-centering effect, there is no rubbing of the voice coil against the magnetic circuit when the amplitude is large. Furthermore, this invention has many remarkable effects, such as suppressing speaker resonance.

In addition to the above-mentioned embodiments, various modifications such as making the vibrating element into a nose comb or a cone are all included in the present invention.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the first embodiment of the present invention. FIG. 2 is a vertical cross-sectional view of the second embodiment of the present invention. FIG. 3 is a vertical cross-sectional view of the third embodiment of the present invention. Vertical cross-sectional views of the speaker Figures 5 and 6 are vertical cross-sectional views of the fourth embodiment of the present invention.

Claims (1)

[Claims] Isolation independent, characterized in that the vibrating element is supported and vibrated while being isolated by a plurality of flexible sealing elements such as magnetic fluids that oppose the pre-torque of the vibrating element so that the vibrating element vibrates while being independent from the support system. Multiple fluid supported vibration device