KR20010003562A - Subminiture goldo speaker - Google Patents

Abstract

PURPOSE: A bone conduction speaker is provided which directly vibrates the human skull to stimulate the auditory nerve to allow the person to hear sound, thereby realizing very small-sized speaker adapted for cellular phones and telephones. CONSTITUTION: In a bone conduction speaker, a voice coil(30) is fixed onto a base plate(14) and a magnetic circuit capable of being vibrated up and down is configured of a yoke(22), a magnet(24) and an upper plate(26). A mastoid portion(16) for externally delivering sound vibration is set on the magnetic circuit. When current is applied to an electrode plate(11) of the base plate from an external power source to enter the voice coil, magnetic field is formed among the upper plate, the magnet and the yoke of the magnetic circuit and the voice coil positioned in a gap(G) of the magnetic circuit and generates an attracting force and repulsive force while the voice coil is being fixed, to vibrate the magnetic circuit up and down. A damper(20) mounted on the yoke restrains the free vibration of the magnetic circuit for maintaining uniform up and down vibration. This vibration is transmitted to the head of a person through the mastoid portion.

Description

Subminiture goldo speaker {Subminiture goldo speaker}

The present invention relates to an ultra-small bone conduction speaker, and more specifically, to directly stimulate the auditory nerve through the bone bone by vibrating the head bone forming the human skull, and to listen to sound, and to make the microcosm existing. The present invention relates to a small sized bone conduction speaker that can be used as a speaker, a cell phone, a walkie-talkie, an ear-phone, and a telephone, which can be used as a speaker.

In general, almost all information around us is transmitted in the form of waves. For example, audible sounds, incoming light, electromagnetic waves received by televisions and radios, etc., are transmitted in the form of wave motion from the source to the destination without moving material between the two points.

An audible sound is a wave produced by the vibration of an object, a special form of kinetic energy produced by atoms moving in a regular pattern. Various acoustic devices used in real life use the kinetic energy of electrons moving when electric current flows through the wire. The kinetic energy of the electrons is a kind of electric energy, and this electric energy makes a sound from the speaker. We hear the sound from the speakers because our eardrum vibrates as the air molecules move.

Sound enters the human ear canal, or through the ear canal, vibrates in the eardrum, and in the inner ear of the eardrum, cells are stimulated and transmitted to the brain. The range of sound that humans can hear is 20 to 20,000 Hz and the sound that is suitable for human hearing is 125 to 8,000 Hz. In addition, the frequency used by humans to communicate with each other is called the conversation range is mainly between 500 ~ 2,000Hz. Normal people can hear sounds of all wavelengths in between, but deaf people can't hear all wavelengths or only certain wavelengths.

Recently, a goldo phone has been developed that allows people with hearing impairments, such as deaf or elderly, to talk like normal people. The bone conduction phone allows the elderly with a hearing impairment to talk like a normal person using bone conduction hearing in the ear without using external aids such as hearing aids. Whereas ordinary telephones convert electrical signals into acoustic signals through a handcuff consisting of speakers, they can be heard through the ear as they hear the hearing impaired by the ear and middle ear, ringing the bones around the forearm. It uses the strange medical principle of. Koldo auditory is said to have the effect of blocking the noise around the hearing, and is said to be excellent not only for the telephone call for the deaf, but also for the telephone call of normal people in the ownership environment such as the market and the construction site.

Korean Patent Publication No. 96-7406 discloses a bone conduction vibrator that enables the hearing loss of an alleged deaf person by bone conduction hearing and a voice signal by using a normal airway hearing. The bone conduction oscillator fixes a mastoid for directly stimulating the head bone on the top of the voice coil and vibrates the diaphragm by interaction between the stator magnet and the magnetic field by the voice coil.

However, in the bone conduction vibrator, the lead wire of the voice coil is likely to be disconnected by vibration, and furthermore, when miniaturization is promoted, the size reduction is limited due to the interference of the lead wire, so that the occurrence rate of the disconnection of the lead wire is greatly increased and the speaker can be exerted. The output can also be weak. In addition, the bone conduction vibrator has a drawback that the contents of the call can be exposed to the outside during the use of the communication terminal due to the large amount of sound emitted to the outside.

The present invention has been made to solve the conventional problems as described above, an object of the present invention, by stimulating the auditory nerve through the bone bone by directly vibrating the head bone forming a human skull to hear the sound. To provide an ultra compact godo speaker.

Another object of the present invention, unlike the existing bone conduction vibrator structure is fixed to the voice coil to the base plate, and installed a magnetic circuit capable of vibrating up and down, and has a mastoid for transmitting the acoustic vibration to the outside on the magnetic circuit top Accordingly, it is possible to provide a compact speaker that can be miniaturized, can be applied to various purposes, and has low sound emission to the outside, thereby ensuring communication security.

1 is a plan view of a miniature bone conduction speaker according to a preferred embodiment of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG. 1; <Explanation of symbols for main parts of drawing>

10: bonebone speaker 12: frame

14: base plate 16: mastoid (mastoid)

18 Bushing 20 Damper

22 yoke 24 magnet

26: top plate 28: adapter

30: voice coil 32: eyelet

S: internal space G: spacing

In order to achieve the above object, the present invention,

A frame having a top wall, a side wall, a bottom wall, and a stepped shoulder formed radially at a boundary between the top wall and the side wall, the frame defining a predetermined space;

A vibration contact part fixedly installed at a central opening formed at the center of the upper wall, protruding upward with respect to the upper wall, and directly contacting a head of the human body;

A bushing disposed upright on an inner surface of the shoulder and an upper surface of the lower wall and fitted to the inner surface of the side wall;

A damper having a radial end matched between an inner surface of the shoulder and an upper surface of the bushing and supported by the bushing to reduce vibration or sound amplitude while performing stable vibration;

It is located in the space, and has a main body portion to be fitted into the assembly hole formed in the center of the damper and an extension part integrally formed with the main body portion and extending downward, and the other end of the damper through a shoulder formed in the main body portion Yoke for supporting and concentrating magnetic flux;

A magnet disposed radially inward of the extension part and having an upper surface closely adhered to a lower surface of the main body part;

An upper plate disposed radially inward of the extension portion and forming a magnetic circuit together with the yoke and the magnet, the upper plate being in close contact with the lower surface of the magnet;

A voice coil disposed at a gap formed between both ends of the upper plate and the magnet and an inner surface of the extension part, and having a lower end fixed to the lower wall; And

It is provided between the top surface of the yoke and the inner surface of the vibration contact portion to provide a bone conduction speaker comprising an adapter for holding and holding the vibration contact.

As described above, the bone conduction speaker according to the present invention comprises a magnetic circuit that fixes the voice coil to the lower wall of the frame and enables vertical vibration with the yoke, the magnet and the upper plate, and transmits the acoustic vibration to the outside of the magnetic circuit. By providing a vibrating contact portion to directly vibrate the head bones forming the human skull to stimulate the auditory nerve through the bone can listen to the sound.

Hereinafter, with reference to the accompanying drawings will be described in more detail the ultra-small bone conduction speaker according to the present invention.

1 is a plan view of an ultra-small bone conduction speaker according to a preferred embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II-II of FIG.

1 and 2, the ultra compact bone conduction speaker 10 according to a preferred embodiment of the present invention has a cylindrical shape and includes a frame 12 that forms a sidewall and an upper wall of the bone conduction speaker 10, but includes a frame ( A circular base plate 14 is fitted into the open lower inner side of 12). Alternatively, the lower wall of the frame 12 may be formed of the base plate 14. The frame 12 and the base plate 14 define a constant space.

On the bottom outer surface of the base plate 14, an electrode terminal plate 11 for receiving a current from an external power supply source (not shown) is formed, and one end of the coil 13 is soldered and fixed to the electrode terminal plate 11. The coil 13 extends through the base plate 14 to the interior of the bone conduction speaker 10, and the other end of the coil 13 thus extended is upright fixed to the base plate 14 in the bone conduction speaker 10. It is connected to the lower end of the voice coil 30. When a current is applied from the external power supply to the electrode terminal plate 11 so that a current is supplied from the electrode terminal plate 11 along the coil 13 to the voice coil 30, the voice coil 30 generates a magnetic field from the voice signal electrical energy. Induces a change.

A circular opening (not shown) formed in the center of the upper wall 12a of the frame 12 is fixedly provided with a mastoid 16, which is a vibration contact portion which is in direct contact with the head of the human body. The mastoid 16 protrudes upward with respect to the upper wall 12a of the frame 12 and has a shape that is smoothly curved with a constant curvature in consideration of contact with the head of the human body.

A stepped shoulder 12b is radially formed at the boundary between the upper wall 12a and the side wall 12c of the frame 12, and the inner surface of the shoulder 12b and the base plate 14 are formed inside the bone conduction speaker 10. On the upper surface of the upright bushing 18 and a horizontal damper 20 is installed. The bushing 18 is a thin cylinder fitted to the inner surface of the side wall 12c, and is used to stably maintain the vibration of the damper 20 during operation of the bone conduction speaker 10. The outer surface of the bushing 18 is in close contact with the inner surface of the frame side wall 12c. The bushing 18 supports the radial end of the damper 20 disposed in the bending direction in the bone conduction speaker 10. The damper 20 is for reducing the amplitude of vibration or sound by dissipating energy, and the taran of the damper 20 is a shoulder of the yoke 22 disposed at the center of the bone conduction speaker 20. 22b).

The yoke 22 is a case for concentrating magnetic flux in the bone conduction speaker 10 and is made of cast iron or cast steel. The yoke 22 is located in the interior space S defined by the base plate 14, bushing 18 and damper 20. In the internal space S, the yoke 22 is formed integrally with the main body portion 22a and the main body portion 22a fitted in a circular joining hole (not shown) formed in the center of the damper 20 and is downwardly directed. 22d of extension parts are provided.

A circular magnet 24 and a top plate 26 are disposed radially inward of the extension 22d of the yoke 22. The magnet 24 and the top plate 26 together with the yoke 22 constitute a magnetic circuit. The upper surface of the magnet 24 is in close contact with the lower surface of the body portion 22a of the yoke 22, and the upper surface of the upper plate 26 is in close contact with the lower surface of the magnet 24. The voice coil 30 described above is disposed in the gap G formed between the upper plate 20 and both ends of the magnet 24 and the inner surface of the extension part 22d of the yoke 22.

On the other hand, an adapter 28 for fixing and supporting the mastoid 16 is disposed between the top surface 22b of the yoke 22 and the inner surface of the mastoid 16. Adapter 28, yoke 22, magnet 24, and top plate 26, which are arranged vertically in the bone conduction speaker 10, are tubular in junction holes (not shown) formed through their centers, respectively. It is fixed integrally by inserting the eyelets 32, which are metal fittings of the pipe, and pressing both ends of the eyelets 32 together.

The operation of the ultra compact bone conduction speaker 10 according to the present invention configured as described above will be described briefly.

If a current is applied to the electrode terminal plate 11 from an external power supply source and current is supplied from the electrode terminal plate 11 to the voice coil 30 along the coil 13, the voice signal electric energy is supplied to the voice coil 30. Induce a change in the magnetic field. That is, when a current is applied to the voice coil 30, a magnetic field is generated between the voice coil 30 located in the gap G of the magnetic circuit composed of the top plate 26, the magnet 24, and the yoke 22. As it happens, Fleming's left-hand rule holds.

Then, in the state where the voice coil 30 is fixed, the magnetic fields formed between the voice coil 30, the upper plate 26, the magnet 24, and the yoke 22 mutually engage with each other by applying attraction force and repulsive force. The upper plate 26, the magnet 24, and the yoke 22, which are the magnetic circuits, vibrate up and down. At this time, the free vibration of the magnetic circuit is suppressed by the damper 20 installed at the top of the yoke 22 to maintain a constant vertical vibration. This vibration is transmitted through the mastoid 16 to the head of the human being in contact with the mastoid 16, and as a result, a vibration force for listening to the bone conduction sound is obtained.

As mentioned above, the ultra compact bone conduction speaker 10 according to the preferred embodiment of the present invention, unlike the existing bone conduction vibrator structure, the voice coil 30 is fixed to the base plate 14 and the yoke 22 The magnet 24 and the upper plate 26 constitute a magnetic circuit capable of vertical vibration and have a mastoid 10 for transmitting acoustic vibration to the outside of the magnetic circuit to form a human skull. By vibrating the head bones directly, the auditory nerve is stimulated through the bone canal so that not only normal people but also various deaf people can hear sound. In addition, the ultra-small bone conduction speaker 10 of the present invention can be used in a cell phone, a walkie-talkie, an earring-type cell phone, a telephone that is not possible to be applied to a conventional bone conduction speaker. In addition, there is a low sound emission to the outside, there is an effect that the communication security is securely maintained.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (4)

A frame having a top wall, a side wall, a bottom wall, and a stepped shoulder formed radially at a boundary between the top wall and the side wall, the frame defining a predetermined space; A vibration contact part fixedly installed at a central opening formed at the center of the upper wall, protruding upward with respect to the upper wall, and directly contacting a head of the human body; A bushing disposed upright on an inner surface of the shoulder and an upper surface of the lower wall to fit the inner surface of the side wall; A radial end disposed between an inner surface of the shoulder and an upper surface of the bushing, the damper being supported by the bushing to reduce vibration or sound amplitude while performing stable vibration; It is located in the space, and has a main body portion to be fitted into the assembly hole formed in the center of the damper and an extension part integrally formed with the main body portion and extending downward, and the other end of the damper through a shoulder formed in the main body portion Yoke for supporting and concentrating magnetic flux; A magnet disposed radially inward of the extension part and having an upper surface closely adhered to a lower surface of the main body part; An upper plate disposed radially inward of the extension part and forming a magnetic circuit together with the yoke and the magnet, the upper plate being in close contact with the lower surface of the magnet; And And a voice coil disposed at an interval formed between both ends of the upper plate and the magnet and an inner surface of the extension part, and having a lower end fixed to the lower wall. The bone conduction speaker of claim 1, wherein the bone conduction speaker further comprises an adapter disposed between an uppermost surface of the yoke and an inner surface of the vibration contact portion to fix and support the vibration contact portion. 3. The electrode terminal of claim 2, wherein an electrode terminal for receiving a current from an external power supply is formed on a bottom outer surface of the lower wall, and one end of a coil is soldered and fixed to the electrode terminal, and the coil passes through the lower wall. A bone conduction speaker extending into the bone conduction speaker, wherein the other end of the coil is connected to the lower end of the voice coil. 4. The tubular metal eyelet is inserted into a joining hole formed through the center of the adapter, the yoke, the magnet, and the upper plate, respectively, arranged vertically in the bone conduction speaker. The voice coil is fixed when the both ends of the eyelet are pressed and bonded together, and when a current is applied from the external power supply to the electrode terminal to apply current to the voice coil along the coil. In this state, the magnetic coils formed between the voice coil, the upper plate, the magnet, and the yoke exert an attractive force and repulsive force on each other so that the magnetic circuit vibrates up and down, and the damper is configured to freely vibrate the magnetic circuit. It is suppressed to maintain a constant up and down vibration, the vibration is the vibration contact portion through the vibration contact portion The bone conduction speaker, characterized in that delivered to the head of the human being in contact.