JP2004146944A - Vibration body feeling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration body feeling apparatus responding to a sound signal for enhancing drive efficiency of a DC motor type vibrating element, resulting in enhancing the effect of vibration body feeling. <P>SOLUTION: A vibrating element drive rectifying amplifier 4a applies full-wave rectification to the sound signal whose low sound frequency is boosted to generate a drive signal for the DC motor type vibrating element 3a, with respect to the DC motor type vibrating element 3a in which an eccentric weight is fitted to a rotary shaft. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vibration sensation device for experiencing the low frequency range of an audio signal.For example, in home entertainment, when watching music or a movie, a chair, sofa, bed, mat, or the like that vibrates in synchronization with the sound effect of the music or the movie. The present invention relates to a vibrating sensation device suitable for use in increasing the emotion of music and the power of movies.
[0002]
[Prior art]
Conventional vibration sensation devices (also called acoustic sensation devices) incorporate a vibration element that applies the same electrodynamic principle as a speaker into a chair, sofa, bed, mat, etc. as a transducer to reduce the level of the sound signal level and the strength of the bass range. The vibration element is configured to vibrate in synchronization.
[0003]
FIG. 5 is a schematic diagram of a system in which a conventional vibration sensation device is applied to a chair. A listener 1 sits on a chair-type vibration sensation device 2 and senses sound and vibration. In this case, a reproduced audio signal 7 of a program source from a CD / DVD player (hereinafter simply referred to as CD / DVD) 5 is amplified by a vibrating element driving amplifier 4 and a plurality of electrodynamic vibrating elements 3 are driven to chair. The vibrating device 2 is vibrated. The listener 1 listens to the reproduced audio signal 7 from the DVD / CD player 5 through the headphones 6, and at the same time, feels the vibration generated from the electro-dynamic type vibration element 3 in accordance with the strength of the reproduced audio signal 7 with the chair type vibration sensing device 2. You can experience the emotion of music and the power of movies.
[0004]
The electro-dynamic type vibration element 3 is generally provided on the waist, the foot side upper and lower portions of the chair type vibration sensation device 2 so that the listener 1 can easily feel the stimulation of vibration, and the reproduced audio signal from the CD / DVD player 5 is provided. 7 oscillates in synchronism with the strength of the bass range component. FIG. 6 shows an outline of the structure of a conventional electrodynamic vibration element 3, in which a moving coil 13 is inserted in a magnetic gap of a magnetic circuit 14 having a magnet 15 as a magnetomotive force, and the output of the vibration element driving amplifier 4 is output. The moving coil 13 is guided by the moving coil 13 and vibrates in synchronization with the strength of the low frequency range component of the reproduced audio signal 7 of the program source according to Fleming's law. The vibration generated from the moving coil 13 is propagated to the chair-type vibrating sensation device 2 as the mounting housing 11 and vibrates.
[0005]
However, the conventional acoustic sensation device uses a vibrating element which applies the same electrodynamic principle as a speaker as a transducer, and these are moved by a moving coil in a magnetic gap of a magnetic circuit 14 having a magnet 15 as a magnetomotive force. 13, the moving coil 13 vibrates depending on the strength of the audio signal flowing through the moving coil 13, and the vibration is propagated to a housing supporting a body such as a chair, a sofa, a bed, a mat, and vibrated. The transducer having the gap of the magnetic circuit 14 and the moving coil 13 is inefficient, the magnetic circuit 14 becomes large, it is difficult to design a compact circuit, and at the same time, its driving requires a large output of an audio signal. There was a disadvantage that the cost was high overall.
[0006]
Therefore, in order to improve the efficiency and reduce the size of the transducer, and at the same time to reduce the size of the vibrating element drive circuit and to greatly reduce the cost, as a conventional example, for example, Japanese Patent Application Laid-Open A method has been proposed in which an eccentric weight is attached and a DC motor is vibrated in synchronization with the strength of a low frequency range of an audio signal. In this configuration, a signal in a low frequency range is applied to a DC motor via an emitter follower type motor drive circuit.
[0007]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 4-126778 [0008]
[Problems to be solved by the invention]
However, in the above-described conventional example, since the DC motor is driven by the emitter follower type motor drive circuit, the DC motor is driven by DC in which the audio signal is half-wave rectified, so that the driving efficiency of the motor is poor. In order to supply a necessary drive current, the voltage of the motor drive circuit must be increased. In addition, since the DC motor is driven flat only for signals in the low frequency range of 100 Hz or less, there is a problem that the efficiency is low and a powerful vibration of the audio signal cannot be sensed at the same time.
[0009]
The present invention has been made in view of the above-described problems of the related art, and has as its object to provide a vibration sensation device capable of improving the efficiency of a DC motor type vibration element and, consequently, improving the vibration sensation effect.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention drives a DC motor type vibrating element by boosting a low frequency range of an audio signal and performing full-wave rectification.
That is, according to the present invention, a DC motor type vibration element having an eccentric weight attached to a rotating shaft,
Amplification means for boosting the bass range of the audio signal;
DC motor driving means for driving the DC motor type vibration element by generating a drive signal for the DC motor type vibration element by full-wave rectifying the signal amplified by the amplification means,
Provided is a vibration sensation device having the same.
[0011]
According to the present invention, in order to achieve the above object, the low frequency range of the audio signal is boosted, and the DC motor type vibrating element is rotated forward and backward in the positive and negative directions of the low frequency range, respectively.
That is, according to the present invention, a DC motor type vibration element,
Amplification means for boosting the bass range of the audio signal;
DC motor driving means for hunting the rotation direction of the DC motor type vibrating element in the forward and reverse directions according to the plus and minus directions of the signal amplified by the amplifying means,
Provided is a vibration sensation device having the same.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a first embodiment of the vibration sensation device according to the present invention, and FIG. 2 is a configuration diagram showing the DC motor type vibration element of FIG. 1 in detail.
[0013]
FIG. 1 shows a vibration sensation device according to a first embodiment of the present invention, in which a DC motor type vibration element 3a is used as a vibration source. The low-frequency component of the reproduced audio signal 7 from the CD / DVD player 5 is emphasized by the low boost amplifier 8, and is amplified to the current level necessary for driving the DC motor type vibration element 3 a by the vibration element drive rectification amplifier 4 a, and the full wave The current is rectified and supplied to the DC motor type vibration element 3a.
[0014]
As shown in detail in FIG. 2, the DC motor type vibrating element 3a has a configuration in which an eccentric weight 19 is attached to a motor shaft 18 of a motor main body 17, and is synchronized with a low-range sound signal level output from the vibrating element driving rectifying amplifier 4a. It is driven and rotated by the pulsating DC drive signal 9. At this time, due to the dynamic imbalance of the rotating shaft associated with the rotation of the eccentric weight 19, a radial vibration is generated on the rotating shaft. This vibration is propagated from the motor base 16 to the chair-type vibrating sensation device 2 which is the mounting housing 11, and the listener 1 listens to the reproduced audio signal 7 from the DVD / CD player 5 through the headphones 6 and, at the same time, listens to the reproduced audio signal 7. The vibration generated from the DC motor type vibration element 3a in synchronism with the strength of the bass range can be sensed by the chair type vibration sensation device 2, and the emotional feeling of music and the power due to the sound effect can be experienced.
[0015]
The first embodiment of the present invention uses a high-efficiency DC motor as a vibration source and drives it with a drive signal obtained by full-wave rectifying an audio signal. Compared to a type in which a DC motor is driven by a drive signal obtained by half-wave rectifying a signal, the power supply efficiency is high, and at the same time, the size of the vibration element itself can be reduced, and the cost can be significantly reduced. In addition, since the vibrating element is a high-efficiency DC motor, the vibrating element driving rectifying amplifier 4a may have a small audio output, and may have a simple configuration in which a double-wave rectifying function is added to the output of the audio amplifier. . The boosting frequency and boost amount may be set arbitrarily according to the type of the program source. For a movie, a bass of several tens of Hz may be boosted, and for music, a bass may be boosted around a band of about 100 Hz to several tens of Hz of a low music instrument. A more effective bodily sensation can be obtained.
[0016]
That is, in the chair-type vibration sensation device 2 according to the first embodiment of the present invention, it is possible to construct the entire device with a simple configuration as a whole, compactly, with energy saving, and at low cost. Furthermore, the vibration element used in the present invention is not limited to a chair-type vibration sensing device, and can be applied to various uses such as a sofa, a bed, a mat, an attachable flexible sheet, and a band. The number, size, and installation position of the DC motor type vibration elements 3a may be set flexibly according to the application.
[0017]
<Second embodiment>
FIG. 3 shows, as a second embodiment, an example in which a switching regulator 4E is mounted on a vibration element driving amplifier 4b. The reproduced audio output of the CD / DVD player 5 is amplified by a low-speed amplifier 4A, and the signal is PWM-modulated by a high-frequency carrier signal from a carrier oscillator (OSC) 4C by a PWM modulator (MOD) 4B to form a PWM switching pulse. Convert.
[0018]
The switching regulator 4E is driven by the PWM switching pulse to control the DC current guided from the DC power supply (DC SPL) 4D to the DC motor type vibrating element 3a, and similarly from the program source applied to the CD / DVD player 5. The number of revolutions of the DC motor type vibrating element 3a changes depending on the strength of the reproduced audio signal in which the bass range of the reproduced audio signal 7 is boosted, and a vibration synchronized with the level of the reproduced audio signal in which the bass range is boosted is obtained. The switching regulator method has higher power efficiency and energy savings compared to the analog amplifier, and at the same time, the configuration of the vibrating element driving amplifier 4b can be greatly simplified and the cost can be reduced.
[0019]
<Third embodiment>
In the third embodiment, the direct current motor type vibrating element 3a is driven by the alternating current of the reproduced audio signal in which the bass range is boosted from the vibrating element driving amplifier. The DC motor type vibrating element 3a hunts when the direction (polarity) of the current changes due to AC current driving, and generates vibration due to the reaction moment of the rotating shaft. That is, the hunting vibration synchronized with the AC frequency of the reproduced audio signal 7 causes the chair-type vibrating sensation device 2 to vibrate, and the same vibration effect as in the case of using the electrodynamic vibration element 3 can be obtained with energy saving and low cost. it can. For driving the DC motor type vibration element 3a, an AC PWM amplifier or another type of AC amplifier may be used. In this method, it is not always necessary to attach an eccentric weight.
[0020]
<Fourth embodiment>
In the first to third embodiments, a DC motor incorporating a commutator and a brush is used. As a fourth embodiment for further simplifying the structure, FIG. 1 shows a pole vibration generating element 20. A vibrating N-pole magnet 20B and a vibrating S-pole magnet 20C mounted on a yoke 20A capable of half rotation are arranged around the two-pole stator coil 20D.
[0021]
Here, when the bass range of the reproduced audio signal 7 of the CD / DVD player 5 is boosted to the two-pole stator coil 20D and supplied from the vibration element drive amplifier 4b, the half-rotation yoke 20A flows to the two-pole stator coil 20D. The vibration rotational moment 20E is generated according to the strength of the alternating current and the direction (polarity) of the current. That is, a reaction moment of the half-rotation yoke 20A is generated in the two-pole stator coil 20D, and vibration synchronized with the signal level and frequency of the reproduced audio signal 7 of the CD / DVD player 5 is generated. In this case, the relationship between the two-pole stator coil 20D and the half-rotation yoke 20A may be reversed or a half-rotation coil may be used. Further, if necessary, the number of poles may be increased to increase the generated vibration rotational moment 20E.
[0022]
【The invention's effect】
As described above, according to the present invention, as a bodily sensation vibration of an audio signal, a conventional large bass frequency band is boosted and full-wave rectified to drive a DC motor type vibration element. It is possible to improve the efficiency of the vibrating element and, consequently, the vibrating effect.
Also, according to the present invention, the direct current motor type vibrating element is rotated forward and reverse depending on the plus and minus directions of the audio signal whose low range is boosted, so that the bodily sensation synchronized with the frequency of the low range signal of the program source is realized. Vibration can be obtained, and a vibrating effect can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of a vibration sensation device according to the present invention.
FIG. 2 is a configuration diagram showing a motor-type vibration element of FIG. 1 in detail.
FIG. 3 is a configuration diagram illustrating a vibration sensation device according to a second embodiment.
FIG. 4 is a configuration diagram specifically illustrating a motor-type vibration element according to a fourth embodiment.
FIG. 5 is a configuration diagram showing a conventional vibration sensation device.
FIG. 6 is a configuration diagram showing the vibration element of FIG. 5 in detail.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Listener 2 Chair-type vibration sensing device 3 Electrodynamic vibration element 3a DC motor-type vibration element 4, 4b Vibration element drive amplifier 4a Vibration element drive rectification amplifier 4A, 8 Low boost amplifier 4B PWM modulator (MOD)
4C carrier oscillator (OSC)
4D DC power supply (DC SPL)
4E Switching Regulator (SWREG)
Reference Signs List 5 CD / DVD player 6 Headphones 7 Playback audio signal 9 DC current drive signal 11 Mounting casing 13 Moving coil 14 Magnetic circuit 15 Magnet 16 Motor base 17 Motor body 18 Motor shaft 19 Eccentric weight 20 Dipole vibration generating element 20A Half rotation Yoke 20B Vibration N-pole magnet 20C Vibration S-pole magnet 20D 2-pole stator coil 20E Vibration rotational moment

Claims (2)

A DC motor type vibrating element with an eccentric weight attached to the rotating shaft,
Amplification means for boosting the bass range of the audio signal;
DC motor driving means for driving the DC motor type vibration element by generating a drive signal for the DC motor type vibration element by full-wave rectifying the signal amplified by the amplification means,
Vibration sensing device provided. A DC motor type vibrating element,
Amplification means for boosting the bass range of the audio signal;
DC motor driving means for hunting the rotation direction of the DC motor type vibrating element in the forward and reverse directions according to the plus and minus directions of the signal amplified by the amplifying means,
Vibration sensing device provided.

Images