KR20070080949A - Speaker and vibrator - Google Patents

Abstract

An electronic sound converter is provided to simultaneously generate voice and vibration by integrating vibrators having different resonant frequencies into one body and respectively vibrating the vibrators according to an input signal. The first vibrator(11) is relatively lighter than the second vibrator(14) to vibrate by sound, correspondingly to the second vibrator(14) at a high resonant frequency. The second vibrator(14) is relatively heavier than the first vibrator(11) to vibrate by shock, correspondingly to the first vibrator(11) at a low resonant frequency. A pair of elastic members(15) are disposed at a predetermined interval. The elastic members restrict the vibration widths of the vibrators(11,14), and increase the vibrant forces of the vibrators(11,14). The elastic members(15) are fixed to a vibrated body(17) through a fixation body(16). The elastic members(15) respond to vibration transferred from the vibrators(11,14) to generate sound or vibration.

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 object of the present invention is an electro-acoustic transducer for generating sound and vibration, the weight is relatively light compared to the vibrating body 2 to be described later vibrating body 1 and vibrating acoustically corresponding to the vibrating body 2 at a high resonance frequency ; A vibrating body 2 having a relatively lighter weight than the vibrating body 1 and shockingly vibrating 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 above-described vibrating bodies 1, 2, and to repel each of them to increase the vibration force; The above-mentioned elastic member is fixed through the fixing body, and characterized in that it comprises a vibration body to generate sound or vibration in response to the vibration transmitted from the above-described vibrating body 1,2.

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

On the other hand, when the alternating signal of the vibration generating range is input, the aforementioned vibrating body 2, which is relatively heavy, vibrates while reciprocating between the pair of elastic members in response to the vibrating body 1, Power is transmitted to the vibrating body through the elastic member, and the sound of vibration as if it is tapping a 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, as shown in the accompanying drawings, Figure 2, in the electroacoustic transducer for generating sound and vibration, the weight is relatively light compared to the vibrating body 2 (14) to be described later vibrating body 2 (14) at a high resonance frequency Vibrating body 1 (11) vibrating acoustically in response to; A vibrating body 2 (14) having a relatively heavy weight compared to the vibrating body 1 (11) and shocking vibration corresponding to the vibrating body 1 (11) at a low resonance frequency; An elastic member (15) provided with a pair at predetermined intervals to limit the vibration width of the vibrating bodies 1, 2 (11) and 14 as described above, and to increase the vibration force by firing each of them; The above-mentioned elastic member 15 is fixed through the fixing body 16, and includes a vibration body 17 which generates sound or vibration in response to the vibration transmitted from the above-mentioned vibrating bodies 1, 2 (11, 14). It is configured by.

The above-described vibrating body 1 (11) of the present invention configured as described above may be, for example, a coil 13 wound around the coil holder 12, in which magnetic poles at both ends are alternately reversed according to an input AC signal.

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

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

In addition, the coil 13 described above may be wound at predetermined intervals, for example, around the outer circumferential middle of the coil holder 12, but a pair may be wound such that alternating magnetic poles are formed symmetrically, and the coil holder ( 12) A single coil may be wound to form magnetic poles of different polarities at both ends.

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

On the other hand, the above-described elastic member 15 of the present invention may be a rubber material having a high modulus of elasticity, for example, the case in which the vibration path of the vibrating body 1/2 (11) (14) described above is a closed vacuum state In consideration, the through hole 15a may be formed.

In this case, the aforementioned elastic member 15 may be a leaf spring, a coil spring, or 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 described above may be provided with a printed circuit board for soldering the terminal for connecting the terminal of the coil 13 to the outside.

On the other hand, the above-mentioned vibration body 17 of the present invention may be, for example, an LCD window of the mobile phone, may be a case or a part of the mobile phone, and other personal portable terminal that requires sound output and / or vibration generation, or It may also be a component of other electronic devices.

At this time, the above-described 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 so as to be able to reproduce the frequency of the broadband, As shown in Figure 8, different materials may be combined.

In addition, the present invention, as shown in Figure 9 of the accompanying drawings, it is also possible to cover the case between the two elastic members 15 of the outer vibrating body 1 (11) described above with a casing 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 resonant frequency is input from the outside in a state where the vibration generating part is fixed to the vibration body 17, the vibrating body 2 14 that is heavy in weight and low in maneuverability cannot vibrate, Relatively variable vibrating body 1 (11) will react, 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 If the magnetic pole of the vibrating body 2 (14) located on the elastic member 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 N pole of the vibrating body 2 (14); The S-pole of the coil 13 which is in contact with each other acts by an attractive force and collides 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 the electroacoustic transducer that generates sound and vibration, the weight is relatively lighter than the vibrating body 2 (14), which will be described later, and vibrates vibrating in response to the vibrating body 2 (14) at a high resonance frequency. and; A vibrating body 2 (14) having a relatively heavy weight compared to the vibrating body 1 (11) and shocking vibration corresponding to the vibrating body 1 (11) at a low resonance frequency; An elastic member (15) provided with a pair at predetermined intervals to limit the vibration width of the vibrating bodies 1, 2 (11) and 14 as described above, and to increase the vibration force by firing each of them; The above-mentioned elastic member 15 is fixed through the fixing body 16, and includes a vibration body 17 which generates sound or vibration in response to the vibration transmitted from the above-mentioned vibrating bodies 1, 2 (11, 14). Electroacoustic transducer, characterized in that configured by. 2. The electroacoustic transducer according to claim 1, wherein the vibrating body (1) is composed of a coil (13) wound around a coil holder (12), in which magnetic poles of both ends are alternately reversed according to an input AC signal. 3. The electroacoustic transducer according to claim 2, wherein the coil holder (12) is a bobbin capable of winding the coil (13), and flanges (12a) are formed at both ends to maximize vibration force transmission efficiency. The electroacoustic transducer according to any one of claims 2 to 3, wherein the coil (13) wound on the coil holder (12) is wound around the outer circumferential surface of the coil holder (12). The electroacoustic transducer according to any one of claims 2 to 3, wherein the coil (13) wound on the coil holder (12) is wound around the inner circumferential surface of the coil holder (12). 3. An electroacoustic transducer as claimed in claim 2, characterized in that the coil (13) consists of a single winding on the coil holder (12). The method of claim 2, wherein the coil 13 is wound around the middle portion of the coil holder 12 at a predetermined interval, a pair is wound, characterized in that the coil is configured to be wound so as to form mutually symmetrical Electroacoustic transducer. The electroacoustic transducer according to claim 1, wherein the vibrator 2 (14) is composed of a magnet having opposite polarities. The auxiliary magnet (14a) according to any one of claims 1 to 8, wherein the auxiliary magnetic poles (14a) are joined to both ends of the magnets (14), which are the same as the magnetic poles, to concentrate the magnetic field inside the magnet. Electro-acoustic transducer, characterized in that configured. The electroacoustic transducer according to any one of claims 1 to 8, wherein a yoke (14b) is provided at both ends of the magnet (2) to prevent leakage of a magnetic field. The method of claim 1, wherein the elastic member 15 is made of a rubber material having a high modulus of elasticity, in consideration of the case that the vibration path of the vibrating body 1, 2 (11) (14) is in a closed vacuum state, Electro-acoustic transducer, characterized in that the through-hole (15a) for inducing discharge is formed. The method of claim 1, wherein any one of the pair of elastic members 15 is provided with a printed circuit board for soldering and coupling a terminal connecting the terminal of the coil 13 to the outside. Electro-acoustic transducer characterized by. 2. The electroacoustic transducer as claimed in claim 1, wherein the vibrating body is an LCD window of a mobile phone. 2. An electroacoustic transducer as claimed in claim 1, wherein the vibration body (17) is a case of a mobile phone. 15. The vibration body 17 according to any one of claims 1 to 13, characterized in that the vibration body 17 is different in thickness between the portion where vibration is directly transmitted and the other portion so as to reproduce a wide frequency frequency. Electroacoustic transducer. The electroacoustic transducer according to any one of claims 1 to 13 or 14, wherein the vibration body (17) is made of a different material. 2. The electroacoustic transducer as set forth in claim 1, wherein a casing is formed by wrapping a case (18) between both elastic members (15) outside the vibrating body (1).

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