KR101014190B1 - Speaker and vibrator - Google Patents

Abstract

The present invention relates to an electro-acoustic transducer, the object of the present invention consists of a single vibrating body having a different resonant frequency has a multi-function to generate sound and vibration while vibrating in accordance with the input signal, respectively, and can be installed in a minimum installation area An electronic acoustic transducer is provided.

The present invention provides an electroacoustic transducer for generating sound and vibration, comprising: a vibrating body 1 which is relatively light in weight compared to the vibrating body 2 and vibrates vibrating corresponding to the vibrating body 2 at a high resonance frequency; A vibrating body 2 that is relatively heavy in weight compared to the vibrating body 1 and vibrates shockingly corresponding to the vibrating body 1 at a low resonance frequency; An elastic member provided with a pair at predetermined intervals to limit the vibration width of the vibrating bodies 1 and 2, and to repel each of them to increase the vibration force; The elastic member is fixed through a fixing body, characterized in that it comprises a vibration body to generate a sound or vibration in response to the vibration transmitted from the vibrating body 1,2.

According to the present invention, a single vibrating body having different resonant frequencies is composed of one vibrating body and vibrates according to an input signal, thereby allowing a single electro-acoustic transducer to have a multi-function, while being configured in a cylindrical shape to be vibrated, for example, a mobile phone. By allowing the installation to occupy a minimum installation area on the LCD window of the display, it is possible to maximize the display portion of the mobile phone, such as to improve the visibility.

Description

Electronic sound transducer {Speaker and vibrator}

1 is a front view showing an installation state of a conventional electroacoustic transducer.

Figure 2 is a side cross-sectional view showing a configuration of the present invention.

Figure 3 is a side cross-sectional view showing another embodiment of the vibrating body 1 of the present invention.

Figure 4 is a side cross-sectional view showing another embodiment of the vibrating body 1 of the present invention.

Figure 5 is a side view showing another embodiment of the vibrating body 2 of the present invention.

Figure 6 is a side view showing another embodiment of the vibrating body 2 of the present invention.

Figure 7 is a side cross-sectional view showing another embodiment of the vibration body of the present invention.

Figure 8 is a side cross-sectional view showing another embodiment of the vibration body of the present invention.

Figure 9 is a side cross-sectional view showing another embodiment of the present invention.

10 is a front view showing an installation state of the present invention.

11A and 11B are side cross-sectional views showing an operating state of the vibrating body 1 (acoustic output portion).

12A and 12B are side cross-sectional views showing an operating state of the vibrating body 2 (vibration generating portion).

      <Description of Signs of Major Parts of Drawings>

10: electro-acoustic transducer 11: vibration body 1

12: coil holder 13: coil

14: vibrating body 2 14a: auxiliary magnet

14b: yoke 15: elastic member

15a: through hole 16: fixed body

17: Vibrating body

The present invention relates to an electroacoustic transducer, and more particularly, to an electroacoustic transducer that simultaneously generates sound and vibration in one body.

The electric motor plays a role of converting input electrical energy into mechanical energy, and is generally referred to as an electric motor.

The physical principle of driving an electric motor is based on Fleming's left-hand law that a conductor in a magnetic field is subjected to a force, and electrical energy is converted into torque by electromagnetic field mediation in the air gap between the stator and the rotor. do.

Such electric motors are widely used in various fields depending on their size and their use. In particular, in response to the growth of the information and communication industry, they are widely used as vibration motors for vibration call of communication terminals. It is roughly classified into coin type and cylinder or bar type.

A speaker converts electrical energy into mechanical energy by a voice coil between the air gaps, according to Fleming's left-handed law, that a current-carrying conductor is forced when it is in a magnetic field.

That is, when a current signal containing several frequencies is applied to the voice coil, the voice coil generates mechanical energy according to the strength of the current and the magnitude of the frequency, and generates vibrations in the diaphragm attached to the voice coil. As a result, a sound pressure of a predetermined magnitude that the human ear can recognize is generated.

Among these sound pressures, relatively low sound pressures are used to closely adhere to the human ear and are commonly referred to as receivers. In contrast, those with relatively high sound pressure and a certain distance from the human ear are used as speakers. It is called.

The magnetic circuit of such a speaker uses magnetic magnets and top plates in a yoke made of ferrous metal so that magnetic flux can be crossed at right angles to the voice coil existing in the void. The voice coil is bonded to the diaphragm to generate the up and down excitation force by the input signal to vibrate the diaphragm adhered to the frame to generate sound pressure. The diaphragm has various wave shapes in order to remove the buckling phenomenon and excellent response during vertical vibration. The shape of the diaphragm acts as a design variable that has the greatest influence on the frequency characteristics.

The speaker has not changed much in structure for a long time, but recently, in response to the commercialization of high-energy permanent magnets, the development of molding technology for microstructures, and the trend of small size and light weight in the field of information and communication, small size and high performance Is being realized.

In particular, the miniaturization of mobile communication terminals depends on whether the components such as receivers, speaker buzzers, and vibrators that have mechanical dynamic characteristics can be miniaturized. It is done.

Until now, mobile communication terminals have mostly used buzzers to generate ringing sounds, but they are being replaced by speakers having excellent frequency characteristics because they require the generation of various ringing sounds according to user's convenience, taste, and preference changes.

Conventional vibration motors and speakers are mounted in separate locations as separate components when mounted in a mobile communication terminal.

Recently, however, the vibration motor and the speaker are integrally formed, and most of them are used in the form of coins.

Such a conventional vibration motor integrated speaker may be installed inside the LCD window of the mobile phone, for example, as shown in FIG. 1 to improve the output of sound and vibration.

However, in this case, not only the coin type but also the structural inevitability of the vibration motor integrated speaker body and the installation area must be large in order to reproduce vibrations in the low frequency region, so that the area displayed through the LCD is relatively small. Inevitably, this is a problem that reduces the visibility of the mobile phone.

In addition, the conventional diaphragm in the form of a separate plate is provided to operate as a speaker, which has a problem that is easily broken by the external pressure.

The present invention for solving this problem consists of a single vibrating body having a different resonant frequency has a multi-function to generate a sound and vibration while each vibrating in accordance with the input signal, while the electronic acoustic transducer that can be installed in a minimum installation area The purpose is to provide.

The present invention for achieving the above object is an electroacoustic transducer for generating sound and vibration, the weight is relatively light compared to the vibrating body 2 and vibrating body vibrating corresponding to the vibrating body 2 at a high resonance frequency; A vibrating body 2 that is relatively lighter in weight than the vibrating body 1 and vibrates shockingly corresponding to the vibrating body 1 at a low resonance frequency; An elastic member provided with a pair at predetermined intervals to limit the vibration width of the vibrating bodies 1 and 2, and to repel each of them to increase the vibration force; The elastic member is fixed through a fixed body, characterized in that it comprises a vibration body to generate a sound or vibration in response to the vibration transmitted from the vibrating body 1,2.

In the present invention, when the alternating signal of the sound output possible range is input, the vibrating body 1, which is relatively light in weight, vibrates while reciprocating between a pair of elastic members corresponding to the vibrating body 2, and a vibration force obtained from the vibration. The sound is transmitted to the vibration body through the elastic member and the sound is output.

On the other hand, when the alternating signal of the vibration generation range is input, the relatively heavy vibration body 2 vibrates while reciprocating between the pair of elastic members corresponding to the vibration body 1, and the vibration force obtained from the vibration is elastic It is transmitted to the vibrating body through the member, and the vibrating sound like tapping the drum is output.

Embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

First, the present invention is an electroacoustic transducer for generating sound and vibration, as shown in Figure 2 of the accompanying drawings, the weight is relatively lighter than the vibrating body 2 (14) to the vibrating body 2 (14) at a high resonance frequency A vibrating body 1 (11) correspondingly acoustically vibrating; A vibrator 2 (14) having a relatively heavy weight compared to the vibrator 1 (11) and shockingly vibrating corresponding to the vibrator 1 (11) at a low resonance frequency; An elastic member (15) provided with a pair at predetermined intervals to restrict the vibration width of the vibrating bodies 1, 2 (11) and 14 to increase the vibration force by firing each of them; The elastic member 15 is fixed through the fixing body 16, and comprises a vibration body 17 for generating sound or vibration in response to the vibration transmitted from the vibrating body 1, 2 (11) (14) do.

In the present invention configured as described above, the vibrating body 1 11 may be, for example, a coil 13 wound around the coil holder 12 so that the magnetic poles of both ends are alternately reversed according to an AC signal input thereto.

Here, the coil holder 12 may be, for example, a bobbin capable of winding the coil 13, and as shown in FIG. 3, a flange 12a may be formed at both ends to maximize vibration force transmission efficiency. There is also.

In addition, the coil 13 wound on the coil holder 12 may be wound on the inner circumferential surface of the coil holder 12, in which case, the coil holder 12 serves as a case itself.

In addition, the coil holder 12 may be provided with a printed circuit board for soldering the terminal for connecting the terminal of the coil 13 to the outside.

In addition, the coil 13 may be wound, for example, at predetermined intervals around the middle of the outer circumference of the coil holder 12, and a pair may be wound such that alternating magnetic poles are formed symmetrically. A single coil may be wound up so that magnetic poles of different polarities are formed at both ends.

Meanwhile, in the present invention, the vibrating body 2 14 may be, for example, magnets having opposite polarities, and as shown in FIG. 5, the same magnetic poles as the magnetic poles of both ends are bonded to both ends of the magnets, thereby providing a magnet. An auxiliary magnet 14a for concentrating a magnetic field inward may be provided separately, and as shown in FIG. 6, a yoke 14b for preventing leakage of the magnetic field may be coupled to both ends of the magnet.

In addition, in the present invention, the elastic member 15 may be, for example, a rubber material having a high modulus of elasticity, in consideration of a case in which the vibration path of the vibrating bodies 1, 2 (11) and 14 is in a closed vacuum state. The through hole 15a may be formed.

In this case, the elastic member 15 may be a leaf spring, a coil spring, or may be a magnetic material having the same polarity as that of both ends of the vibrating body 2 (14).

In addition, any one of the pair of elastic members 15 may be provided with a printed circuit board for soldering coupling the terminal for connecting the terminal of the coil 13 to the outside.

On the other hand, in the present invention, the vibration body 17 may be, for example, an LCD window of a mobile phone, may be a case or a part of the mobile phone, and other personal portable terminals or other devices that require sound output and / or vibration generation. It may be a component of an electronic device.

At this time, the vibration body 17, for example, as shown in the accompanying drawings, may vary the thickness of the portion in which vibration is generated and the other portion to be able to reproduce the frequency of the broadband, As shown in 8, different materials may be combined.

In addition, according to the present invention, as shown in FIG. 9, the casing may be wrapped between the two elastic members 15 outside the vibrating body 1 (11) with a case 18.

Referring to the operation of the present invention in detail as follows.

In the present invention, as shown in Figure 10, the vibrating body 1 (2) (11) (14), which is a vibration generating portion is fixed to one side of the vibration body 17, due to the structural feature of the present invention in the form of a cylinder In addition, the display area of the LCD window can be increased.

As described above, when an AC signal having a high resonance frequency is input from the outside in a state where the vibration generating part is fixed to the vibration body 17, the vibration body 2 14 having a heavy weight and low maneuverability cannot vibrate, and The light weight vibrating body 1 (11) is reacted, at this time, as shown in Figure 11a of the accompanying drawings, the coil 13 magnetic pole of the vibrating body 1 (11) is formed of NSSN, one side elastic member If the magnetic pole of the vibrating body 2 (14) located on the (15) side is NS, the N pole of the coil 13 in contact with the S pole of the vibrating body 2 (14) and the coil in contact with the N pole of the vibrating body 2 (14). The S-pole of (13) collides with the attraction force while moving toward the side of the elastic member 15 on the opposite side where the vibrating body 2 (14) is located, thereby transmitting a vibrating force to the vibrating body (17).

On the contrary, as shown in b) of FIG. 11, the magnetic pole of the coil 13 of the vibrating body 1 11 is formed of SNNS, and the magnetic pole of the vibrating body 2 14 located on one side of the elastic member 15 is If NS, the repulsive force acts on the N pole of the coil 13 in contact with the N pole of the vibrating body 2 (14) and the S pole of the coil 13 in contact with the S pole of the vibrating body 2 (14). By colliding while moving toward the elastic member 15 where the 14 is located, it transmits an indirect vibration force to the vibration target body 17 to output the corresponding sound.

On the other hand, when an AC signal having a low resonant frequency is input from the outside, the vibrating body 1 (11) having a light weight and high maneuverability cannot vibrate, and the relatively heavy vibrating body 2 (14) reacts. As shown in a) of FIG. 12A, when the magnetic pole of the coil 13 of the vibrating body 1 11 is formed of SNNS, and the magnetic pole of the vibrating body 2 14 located on one side of the elastic member 15 is NS. The repulsive force acts on the N pole of the vibrating body 2 14 in contact with the N pole portion of the coil 13 and the S pole of the vibrating body 2 14 in contact with the S pole of the coil 13. When 14) collides while moving toward the other elastic member 15, the vibration force is transmitted to the vibration target body 17 to generate a vibration sound.

On the contrary, as shown in (b) of FIG. 12, the magnetic pole of the coil 13 of the vibrating body 1 11 is formed of NSSN, and the magnetic pole of the vibrating body 2 14 located on one side of the elastic member 15 is If NS, the repulsive force acts on the N pole of the vibrating body 2 (14) in contact with the N pole of the coil 13 and the S pole of the vibrating body 2 (14) in contact with the S pole portion of the coil (13). 2 (14) collides while moving toward the opposite elastic member 15 side, thereby transmitting a vibration force to the vibration body 17 to generate a vibration sound.

According to the present invention, a single vibrating body having different resonant frequencies is composed of one vibrating body to vibrate each other according to an input signal, thereby generating sound and vibration. For example, by enabling the installation to occupy a minimum installation area on the LCD window of the mobile phone, it is possible to maximize the display portion of the mobile phone and improve the visibility.

Claims (17)

In an electroacoustic transducer in which the vibrating body 1 (11) and the vibrating body 2 (14) collide with the elastic member 15 to generate sound and vibration, the weight is relatively lighter than that of the vibrating body 2 (14), and thus a high resonance frequency is obtained. A vibrating body 1 (11) vibrating acoustically corresponding to the vibrating body 2 (14); A vibrator 2 (14) having a relatively heavy weight compared to the vibrator 1 (11) and shockingly vibrating corresponding to the vibrator 1 (11) at a low resonance frequency; The elastic member 15 is fixed through the fixing body 16, and comprises a vibration body 17 for generating sound or vibration in response to the vibration transmitted from the vibration body 1, 2 (11) (14) However, the vibrating body 17 is configured to vary the thickness of the portion and the other portion to which vibration is directly transmitted so that the frequency of the broadband can be reproduced, and the vibrating body 17 is configured as an LCD window Electroacoustic transducer. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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