KR20010078913A - Sound-to-vibration conversion apparatus - Google Patents

Abstract

PURPOSE: A high output sound-vibration converting apparatus is provided, in which an electromagnet having an iron core and inertial weight is employed, to thereby obtain high output vibration energy and minimize thermal loss from the electromagnet. CONSTITUTION: A sound-vibration converting apparatus comprises magnets(11,11') each of which has an N-pole and an S-pole; and electromagnets(13,13') each of which is arranged to contact the plane where N-pole and S-pole of the magnet are formed. Each of magnets is fixed to a housing(12), and each of electromagnets is arranged to rotate by rotating shafts(15,15'). The electromagnet reciprocates in such directions to get close to or away from the N-pole or S-pole of the magnet in accordance with the interaction between the polarity formed at the electromagnet by the acoustic signal applied to the electromagnet and the N-pole and S-pole of the magnet. Each of electromagnets has inertial weights, respectively, so as to increase the inertial force of the reciprocating movement of the electromagnet, thus vibrating a frame(14) to which the magnet is fixed.

Description

Sound-to-vibration conversion apparatus

The present invention relates to an acoustic-vibration converting apparatus that converts an acoustic signal into vibration and hears the sound through a bone diagram of a human body, and exhibits a large output using an iron core and an inertial weight.

Conventionally, the bone conduction speaker has been developed as a sound listening device for the hearing impaired. This is an acoustic transducer that stimulates the auditory nerve by vibration of the skull instead of the auditory nerve stimulation caused by the eardrum so that the deaf person with a damaged eardrum can hear the sound. Basically, a bone conduction speaker is a speaker device that reproduces sound through liquid or solid (body) instead of air. Bone conduction acoustic listening device for the hearing impaired is disclosed in patent application No. 1994-4746 (filed Oct. 7, 1994).

On the other hand, to expand the purpose of hearing listening for the hearing impaired, so-called "feeling speaker" has been developed that allows you to feel the sound output from the speaker to the human body's sense of touch rather than hearing. The haptic speaker is a speaker that converts sound into vibration and stimulates the auditory nerve by vibrating the vibration transmitted to the human body, and can listen to the sound more lively and thrilling than the conventional sound speaker without giving a loud noise to others. These haptic speakers are mounted on a car seat to meet the needs of audio enthusiasts and can be used for other gaming and theater chairs.

However, conventionally, since the haptic speaker is manufactured using the structure of a general acoustic speaker (see FIG. 1) as it is, high output cannot be obtained. This is because in the conventional acoustic speaker, the diaphragm is made of a soft material such as paper or PVC. Therefore, if the output is increased, the current flows a lot, which shortens the life of the coil due to heat generation. When the natural frequency of the oscillator coincides with the frequency of the amplified signal, the oscillator synchronizes, causing abnormal oscillation. There is a disadvantage that a frequency above a certain band cannot be output.

Figure 1 shows a schematic structure of a conventional acoustic speaker. The permanent magnet 3 is fixed to the frame 1, and the electromagnet 7 having the voice coil 5 wound thereon is inserted into one pole of the permanent magnet 3. The electromagnet 7 has a diaphragm 9 attached thereto, and can reciprocate back and forth together with the electromagnet 7 (in the direction of the Y arrow in FIG. 1). When the acoustic signal V is applied to the voice coil 5, the electromagnet 7 reciprocates due to the magnetic force generated by the voice coil 5, causing the electromagnet 7 to reciprocate and thus vibrating the vibration plate 9. The air is vibrated to generate sound.

The present invention has been invented to improve the disadvantages of the conventional haptic speaker, a sound that increases the vibration energy by reciprocating the electromagnet using the iron core attached to the inertial body by removing the structure of the conventional acoustic speaker (see Figure 1) -To provide a vibration converter.

In order to achieve the above object, the acoustic-vibration converter according to the present invention is located adjacent to a plane in which at least one magnet means having an N pole and an S pole formed on one plane, and an N pole and an S pole of the magnet means formed. At least one magnet means is fixed to the frame, each of the at least one electromagnet is installed so as to be rotatable by a rotation axis, is formed in the electromagnet by the acoustic signal applied to the electromagnet According to the interaction between the polarity and the N pole or the S pole of the magnet means, the electromagnet performs a reciprocating rotational movement toward or away from the N pole or the S pole of the magnet means, and each of the electromagnets includes an inertial addition to the reciprocation of the electromagnet. By increasing the inertial force of the frame characterized in that the magnet is fixed to vibrate in accordance with the reciprocating rotational movement of the electromagnet .

In the above configuration, each electromagnet is preferably manufactured by winding a coil around the central protrusion of the E-shaped core core having three protrusions in one direction. In addition, when the electromagnet is close to or away from the N pole or the S pole of the magnet means, the resistive force in the opposite direction to the movement direction of the electromagnet, the electromagnet is neutral between the N pole and the S pole of the magnet means when there is no voice signal Preferably, at least one electromagnet neutral retaining means to be positioned at the point is further included. In addition, the electromagnet neutral holding means is characterized in that the elastic body provided on the side of the housing and the projections at both ends of the E-shaped core core.

Hereinafter, with reference to the drawings will be described in detail the configuration and operation of the present invention.

1 is a schematic configuration diagram of a conventional acoustic speaker.

2 is a conceptual diagram of the present invention.

Figure 3 is a specific embodiment of the present invention.

<Description of Drawing>

Frame 1; Permanent magnets (3); Voice coil 5; Electromagnet 7; Diaphragm 9; Magnet means 11; A housing 12; Electromagnets 13 and 13 '; Central protrusions 13a and 13a '; Frame 14; Rotary shafts 15 and 15 '; Coils 17 and 17 '; Bearings 19 and 19 '; Inertial weights 23 and 23 '; Electromagnet Neutral Retaining Elastomers (25a, b and 25a ', b')

2 is a conceptual diagram of an acoustic-vibration converter according to the present invention. The magnet means 11, in which the north pole and the south pole are formed on one plane, is fixed to a housing (not shown in Fig. 2 but shown as No. 12 in Fig. 3). The housing will be where the acoustic-vibration converter according to the invention is installed, such as a car seat or a bed, a chair. As the magnet means 11, permanent magnets can be used as shown in FIG. However, even if an electromagnet is used instead of a permanent magnet, there is no relation in the scope of the present invention. Hereinafter, in the description of the embodiment will be described by limiting the magnet means to "permanent magnet".

The electromagnet 13 is located adjacent to the plane on which the N pole and the S pole of the permanent magnet 11 are formed. The electromagnet 13 is installed so as to be rotatable by the rotation shaft 15, and the polarity formed in the electromagnet 13 by the acoustic signal applied to the electromagnet 13 and the N pole or the S pole of the permanent magnet 11. According to the interaction, the electromagnet 13 performs a reciprocating motion toward or away from the N pole or the S pole of the permanent magnet 11 (as shown by the dotted line state A and the solid state state B in FIG. 2).

As described above, the acoustic-vibration device according to the present invention uses magnetic force to convert the acoustic signal into vibration similarly to the conventional one. Therefore, the permanent magnet 11 and the coil is essentially used. However, unlike the conventional haptic speaker, the present invention is a new method in which the coil is wound around the core of the core to reciprocate the manufactured electromagnet 13, causing the action and reaction of the force by the inertial force by the weight of the electromagnet 13 Is adopted. Because of the core core, the magnetic force can be concentrated (concentration of the force), which makes the vibration more exciting and reduces the loss of magnetic force in the coil.

However, the concept of FIG. 2 represents the basic technical idea of the present invention, and there is still a part to be solved. One is the fact that the strong attraction of the permanent magnet 11 interferes with the neutral state of the electromagnet 13 while the electromagnet 13 maintains a narrow gap with the permanent magnet 11. The neutral state of the electromagnet 13 means a state in which the electromagnet 13 is located at an intermediate point between the N pole and the S pole of the permanent magnet 11 (dashed line state A in FIG. 2). On the other hand, the weight of the electromagnet 13 alone has a larger inertia force than a conventional haptic speaker, but in order to further increase the vibration energy, the inertia force of the electromagnet 13 is further increased so that the permanent magnet 11 is fixed to the frame. It is desirable to make this vibration possible.

A more specific embodiment of the present invention, which implements the above two problems, is as shown in FIG. In Fig. 3, it can be seen that the conceptual configuration shown in Fig. 2 is arranged symmetrically on both sides. In addition, each electromagnet 13, 13 'is provided with a coil (a) in the central protrusions 13a, 13a' of the E-shaped core core having three protrusions 13a, b, c and 13a ', b', c 'in one direction. 17, 17 ') is wound up and manufactured. By using the core core in this way, the vibration energy can be enhanced.

The operating principle of the acoustic-vibration converter according to the present invention is that the polarity and magnetic force of the electromagnets 13 and 13 'according to the amplitude and phase of the acoustic signal when the acoustic signals output from the amplifying circuit are applied to the coils 17 and 17'. As the intensity is changed, the attraction force and the repulsive force with the permanent magnets 11 and 11 'are acted on, causing the electromagnets 13 and 13' to reciprocate. At this time, the reciprocating distance of the electromagnets 13 and 13 'simulates the amplitude waveform of the acoustic signal.

Meanwhile, in the structure of FIG. 3, electromagnets should be manufactured so that the polarities of both electromagnets 13 and 13 'are opposite to each other. This is because in the structure of Fig. 3, both electromagnets 13 and 13 'fixed to one frame 14 must move symmetrically with respect to the center vertical line.

In FIG. 3, the electromagnets 13 and 13 'include inertial weights 23 and 23' to increase the inertia force of the reciprocating rotation of the electromagnets 13 and 13 '. Accordingly, the permanent magnets 11 and 11 'and the housing 12 have relatively small inertial forces due to the weight of the inertial weights 23 and 23', although the electromagnets 13 and 13 'are intended to reciprocate about the rotation axis. It will vibrate by reaction. Thus, the vibration of the acoustic-vibration converter according to the present invention becomes even greater. When the housing 12 vibrates, vibration is transmitted to seats, beds, and chairs in which the housing is installed, and the vibration stimulates the tactile sense of the human body.

Note that the natural vibration frequency of the electromagnets 13 and 13 'changes according to the weight of the inertial weights 23 and 23', so that the correct frequency can be determined using an audio generator, etc., and the trap mounted on the amplifier can be adjusted. shall. This will prevent distortion and oscillation during harmonic reproduction.

Meanwhile, referring to FIG. 3, in order to maintain the neutral state of the electromagnets 13 and 13 ′, the electromagnets 13 and 13 ′ may be moved closer or farther away from the N pole or the S pole of the permanent magnets 11 and 11 ′. When the electromagnet (13, 13 ') is resisted in the direction opposite to the movement direction, and there is no voice signal, the electromagnet (13, 13') is the neutral point between the N pole and the S pole of the permanent magnet (11, 11 '). Electromagnetic neutral retaining elastic bodies 25a, b and 25a ', b' for further positioning are further included. The electromagnet neutral retaining elastic bodies 25a, b and 25a ', b' also serve as a kind of braking device for regulating the reciprocating up and down points of the electromagnets 13 and 13 '. In FIG. 3, compression springs are used as the electromagnet neutral retaining elastic bodies 25a, b and 25a ', b', which springs are provided on the sides of the frame 14 and the projections at both ends of the E-shaped iron core core. 13, 13 ') is in a neutral state. As the electromagnet neutral retaining elastic bodies 25a, b and 25a ', b', elastic rubber or the like may be used in addition to the spring. In addition, it is possible to use the spring and the anti-vibration rubber together to make braking smoother.

The braking pressure of the elastic body is set to be proportional to the attractive force of the permanent magnets 11 and 11 '. That is, when artificially reciprocating the electromagnets 13 and 13 ', the torque can be adjusted so that the attraction force of the permanent magnets 11 and 11' is not felt at all.

Among the components not described in FIG. 3, "19, 19 '" denotes a bearing supporting the rotating shaft 15. As shown in FIG. On the other hand, since the vibration action according to the present invention can be tuned to a waveform of a specific frequency, it is preferable to insert a frequency trap device into the amplification circuit. Frequency traps are a type of filter that removes specific frequencies and can be readily implemented by those skilled in the art.

The acoustic-vibration converting apparatus according to the present invention, unlike the conventional sound speaker retrofit method, adopts an electromagnet using an iron core core and an inertial weight to obtain a large output vibration energy and to reduce heat loss generated in the electromagnet. Minimized. In addition, there is an advantage that the structure is simple and the productivity is low because the productivity is good. The sound-vibration converter of the present invention can be built in a vehicle seat to satisfy the needs of car audio enthusiasts, and can be mounted on a computer, game console, theater chair, vehicle floor or ceiling, wall, etc. You can feel the powerful sound. In addition, it is embedded in the mattress of the bed is effective for induction of sleep in pregnant women's prenatal or insomnia patients, it is possible to produce a dramatic atmosphere of the couple life.

When the sound-vibration converter of the present invention is mounted on the keyboard of the electronic piano, the user can feel the vibration directly from the hand pressing the keyboard, so that the hearing impaired can play the piano while feeling the sound, and the vibration which is a weak point of the electronic piano is The problem is that there is no need to insist on expensive modern pianos. In addition, the acoustic-vibration converter according to the present invention is applicable to the acoustic resonance device. That is, it is possible to prevent eavesdropping by attenuating vehicle noise, toilet sound, etc., and attaching it to a wall or a window of a conference room.

In addition, it can be used for communication means using a liquid or a solid medium, and can be used to relieve fatigue of mind and body as a massage function using sound rate rather than a simple vibration of a conventional motor massager.

Claims (6)

An acoustic-vibration converter comprising at least one magnet means having an N pole and an S pole formed on one plane, and at least one electromagnet positioned adjacent to a plane where the N pole and the S pole of the magnet means are formed. The at least one magnet means is fixed to the housing, Each of the at least one electromagnet is rotatably installed by a rotating shaft, and the electromagnet is connected to the magnetic pole according to the polarity formed in the electromagnet by an acoustic signal applied to the electromagnet and the N pole or the S pole of the magnet means. An acoustic-vibration inverter, characterized in that the reciprocating motion is approaching or away from the N pole or the S pole. The acoustic-vibration converter according to claim 1, wherein each of the electromagnets includes an inertial addition to increase the inertial force of the reciprocating rotational motion of the electromagnet, thereby vibrating the frame to which the magnet means is fixed according to the reciprocating rotational motion of the electromagnet. The acoustic-vibration converter according to claim 1 or 2, wherein the magnet means is a permanent magnet. The acoustic-vibration converter according to claim 1 or 2, wherein each electromagnet is manufactured by winding a coil around a central protrusion of an E-shaped core having three protrusions in one direction. The method according to claim 1 or 2, wherein each of the electromagnets provides resistance in the direction opposite to the direction of movement of the electromagnet when approaching or away from the N pole or S pole of the magnet means, the electromagnet is the N pole and S of the magnet means when there is no voice signal And at least one electromagnet neutral retaining means for positioning at a neutral point between the poles. 6. The acoustic-vibration converting apparatus according to claim 5, wherein the electromagnet neutral retaining means is an elastic body provided on the sides of the housing and the projections at both ends of the E-shaped core core.