KR100412223B1 - Speaker united in vibration motor - Google Patents

Abstract

The present invention relates to a vibration motor-integrated speaker composed of a speaker unit 100 for outputting a ringing sound and a sound signal and a vibration motor unit 200 for generating rotational vibration, the speaker unit 100 is a magnet (60) ) And the film vibrating plate 40 is shaken by the electromagnetic force generated between the film diaphragm 40 having the electrode pattern 42 to generate sound, and the vibrating motor unit 200 includes the magnet 60 and the vibrating rotating body. The vibration rotating body 70 rotates eccentrically by the electromagnetic force generated between the vibration coils 76 of 70 to generate vibration.

Since the present invention is configured to reduce the number of parts of the product, the assembly and productivity are improved, and because the vibration rotating body is rotated by the electromagnetic force to have a rotational vibration, the vibration force superior to the vibration force of the conventional vertical vibration is achieved. In addition, since the vibration motor is integrally formed in the speaker, when applied to a mobile communication terminal, there is an effect that it is possible to reduce the size and the size by the complex of components.

Description

Speaker unit integrated speaker {Speaker united in vibration motor}

The present invention relates to a speaker with an integrated vibration motor, and more particularly, a speaker which is mounted in various mobile communication terminals such as a cellular phone (cellular phone or PCS phone) to generate a ringing sound and a vibration motor for silent vibration according to the ringing. It relates to a vibration motor integrated speaker.

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 applied in various fields according to their size and their use. Especially, in response to the growth of the information and telecommunications 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.

In other words, when a current signal containing several frequencies is applied to a voice coil, the voice coil generates mechanical energy according to the strength of the current and the magnitude of the frequency, and ultimately generates vibration in the diaphragm attached to the voice coil. The human ear generates sound pressure of a predetermined magnitude.

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.

Conventionally, when the vibration motor and the speaker is mounted in a separate position as a separate component when mounted on the mobile communication terminal, recently, the vibration motor and the speaker is a trend that is integrally configured for the miniaturization of the product.

1 is a cross-sectional view showing an example of a conventional vibration motor integrated speaker. Referring to this, as the speaker unit 1, a protector 2 having a plurality of sound outlets 3 formed therein, a diaphragm 5 for generating sound by vibration at a sound pressure, and mounted at a lower end of the diaphragm 5. A voice coil 6 oscillating by a voice current applied thereto, a top plate 7 mounted in the voice coil 6, a magnet 8 generating a magnetic field of a predetermined size, and the magnet 8 Is composed of a yoke (9), which is an iron core without a fixed winding, and a frame (10) configured at an outer circumference of the yoke (9) and coupled with a protector (2), and the vibration motor unit (13) as the speaker unit. (1) is formed by the lower cover 12 having the speaker part 1 installed inside, and a current applied to the lower part of the yoke 9 of the speaker part 1 fixed to the center of the lower cover 12. Vibration coil 11 for generating a magnetic field to vibrate the speaker unit 1 up and down, and the The vibration diaphragm 4 is connected between the frame 10 of the speaker unit 1 and the lower cover 12 to maintain the up and down vibration of the speaker unit 1.

In the case of the conventional vibration motor-integrated speaker configured as described above, the vibration generating method generates vibration by using the vertical amplitude at the low frequency of the speaker unit 1.

In addition, the speaker unit 1 reproduces the sound by the vibration of the diaphragm 5 by the voice current flowing through the voice coil 6, which is the action of the magnetic fields of the top plate 7, the magnet 8 and the yoke 9. Is made by.

Conventionally, the vibration motor integrated speaker does not operate the vibration motor unit 13 when the speaker unit 1 operates, and the speaker unit 1 does not operate when the vibration motor unit 13 operates. In other words, the speaker unit 1 and the vibration motor unit 13 do not operate at the same time. This is because the operation of the speaker or the vibration motor is selectively set in order to be able to generate a ringing sound or recognize a call state by the function of the mobile communication terminal or by a user's request.

However, when the vibration motor integrated speaker is conventionally applied, the speaker vibrates up and down by the vibration motor when the vibration mode is set in order to display a call state from the mobile communication terminal. There was a disadvantage that was not recognized.

In addition, since the thin diaphragm diaphragm supports the vertical motion of the entire vibrating motor unit, the diaphragm for the vibration may deteriorate or torn when used for a long time, resulting in a loss of reliability of the product.

In addition, as the overall components such as the voice coil, the vibration coil, the speaker diaphragm and the vibration diaphragm are many, the assembly of the product is degraded.

On the other hand, in the case of not exhibiting the inherent characteristics of the speaker to generate a sufficient sound pressure, there was a problem such as product deterioration and loss of reliability.

The present invention has been made in order to solve the above problems, it is possible to generate the vibration by the rotational movement having an eccentric rotation rather than up and down vibration to improve the vibration force and to reduce the number of parts to improve the assembly To provide a vibration motor integrated speaker.

In addition, another object of the present invention is to provide a speaker coupled to the vibration motor to one side of the mobile communication terminal to secure space and reduce the manufacturing cost and simplify the manufacturing process of the mobile communication terminal.

In order to achieve the above object, the vibration motor-integrated speaker according to the present invention comprises a protector having a sound discharge port, a thin film diaphragm formed with a plurality of electrode patterns so that current can flow, and a film diaphragm formed at the edge of the protector. A fixed frame, a printed circuit board for supplying current applied from outside to the film diaphragm to the film diaphragm, a magnet configured to generate a magnetic field of a predetermined size at a lower portion of the printed circuit board, and at a predetermined distance from the magnet A vibrating coil configured to be eccentrically rotatable and electrically connected to the printed circuit board is formed and is selectively rotated by electromagnetic force between the vibrating coil and the magnet, and a cover is assembled around the outer side of the frame to protect the inside. It is included.

1 is a cross-sectional view showing a portable mobile communication terminal showing a state in which a vibration motor and a speaker are integrally mounted in the related art;

Figure 2 is a perspective view of a vibration motor integrated speaker according to the present invention,

3 is a cross-sectional view of a vibration motor integrated speaker of the present invention,

4 and 5 are plan views showing the change of the magnetic field according to the shape of the film diaphragm and the direction of the current.

♣ Explanation of symbols for main part of drawing ♣

20: protector 22: sound outlet

30: frame 40: film diaphragm

42: electrode pattern 42a: first pattern portion

42b: second pattern portion 42c: third pattern portion

42d: fourth pattern portion 50: printed circuit board

52: brush 60: magnet

70: vibration rotating body 72: central axis

74: connection terminal 76: vibration coil

78: bearing 100: speaker unit

200: vibration motor unit

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view of a vibration motor integrated speaker according to the present invention, Figure 3 is a cross-sectional view, Figures 4 and 5 are plan views showing a change in the magnetic field according to the shape of the film diaphragm and the direction of the current.

Referring to this, the present invention applied to the mobile communication terminal is a speaker unit 100 for outputting a predetermined sound pressure to indicate the reception state of the voice and data signals received from the base station or the relay station, and in a silent mode Vibration motor unit 200 having a predetermined excitation force is configured integrally.

The speaker unit 100 is to generate sound while the film diaphragm 40 is shaken by the electromagnetic force generated between the magnet 60 and the film diaphragm 40 having the electrode pattern 42, the vibration motor unit 200 The vibration is generated while the vibration rotating body 70 is eccentrically rotated by the electromagnetic force generated between the magnet 60 and the vibration coil 76 of the vibration rotating body 70.

According to the present invention, the protector 20 is to prevent the introduction of various foreign substances to the speaker from the outside and at the same time to maintain a sufficient sound pressure, the sound discharge port 22 is formed on one side, the sound chamber Sound is emitted and output through the outlet 22 to the outside.

The frame 30 is fixedly formed at the bottom edge of the protector 20, and the film diaphragm 40 of the circular thin film having a plurality of electrode patterns formed therebetween so that a current flows between the protector 20 and the frame 30. ) Is formed.

The plurality of electrode patterns formed on the film diaphragm 40 are divided into four pattern parts arranged symmetrically with each other, and are connected to one line from the first pattern part 42a to the fourth pattern part 42d.

At this time, the four pattern parts have a structure in which the pattern parts facing in the diagonal direction have the same electrodes when current is applied.

For example, as shown in FIGS. 4 and 5, one end portion of the first pattern portion 42a is connected so that a current is applied from the printed circuit board 50 to be described later, and the other end is left outward in four pattern portions. It has a wound shape, one end of the second pattern portion 42b is connected to the end of the first pattern portion 42a, and the other end has a shape wound around the inside, and the third pattern portion 42c. One end of the second pattern portion 42b is connected to the end of the second end portion is wound around the outer shape, one end of the fourth pattern portion 42d is connected to the end of the third pattern portion 42c The other end is wound around the inside of the printed circuit board 50 is connected to the current.

The electrode of the pattern portion is automatically changed according to the direction of the applied current.

That is, as shown by arrows in FIGS. 4 and 5, when a magnetic field is generated and a current flows from the first pattern portion 42a to the fourth pattern portion 42d, the first pattern portion 42a and the third pattern portion. 42c has the N pole, and the corresponding second pattern portion 42b and the fourth pattern portion 42d have the S pole. However, when a current flows from the fourth pattern portion 42d to the first pattern portion 42a, the electrodes of each pattern portion are converted.

The printed circuit board 50 is fixed to the frame 30 so as to be positioned below the film diaphragm 40, and the printed circuit board 50 supplies current applied from the outside to the film diaphragm 40.

In addition, a magnet 60, which is a permanent magnet, is fixedly installed below the printed circuit board 50, and the magnet 60 generates a magnetic field having a predetermined size in the form of a disk having a hollow.

That is, in the present invention, the magnet 60 uses quadrupole magnets to smoothly vibrate the film diaphragm 40, and thus the parts facing each other diagonally have the same electrode. Herein, the magnet 60 used in the present invention is not limited to the quadrupole, but in consideration of the pattern portion formed on the film diaphragm 40, the most preferred multipolar magnet such as six-pole or eight-pole and the like is considered. Applicable

At a predetermined distance from the magnet 60, a vibrating rotating body 70 is installed at a lower portion thereof, and the vibrating rotating body 70 rotates about the central axis 72 to generate vibration by eccentricity of weight. .

That is, the central axis 72 is fixedly installed on the bottom surface of the central portion of the printed circuit board 50, and the semi-circular vibration rotating body 70 is eccentrically coupled to the central axis 72, and the central axis 72 ) And a bearing 78 is interposed between the vibration rotating body 70 to assist the rotation of the vibration rotating body 70.

In addition, a vibration coil 76 is formed at the vibration rotating body 70, and a connection terminal 74 electrically connected to the vibration coil 76 is formed at the center of the upper surface.

In addition, a brush 52 extending from the printed circuit board 50 is connected to the connection terminal 74, and a current applied to the printed circuit board 50 is supplied to the connection terminal 74 through the brush 52. In addition, the vibrating rotor 70 is selectively rotated by the electromagnetic force generated between the vibrating coil 76 and the magnet 60.

On the other hand, the outer periphery of the frame 30, the cover 80 is assembled to keep the outside beautiful and at the same time protect the inside.

Now, the operation and effect of the present invention thus constructed will be described.

First, the operation of the speaker unit 100 will be described. The magnet 60, which is a permanent magnet, will always generate the same magnetic field. When a negative current is applied to the electrode pattern 42 of the film diaphragm 40 in this state, The action of the electromagnetic force is made by the change, the film diaphragm 40 is caused by the electromagnetic force or repulsive force to vibrate up and down.

That is, as shown in FIGS. 4 and 5, when the direction of the current applied to the film diaphragm 40 is continuously changed, the electrodes of the pattern portions of the film diaphragm 40 are continuously converted to the magnet 60. The attraction force or repulsive force is generated by the electromagnetic force with), and thus, the film diaphragm 40 vibrates finely, and a predetermined ringing sound is generated or a silver signal is reproduced and discharged through the sound emission port 22 of the protector 20. . The voice current is applied through the printed circuit board 50 from the control circuit of the mobile communication terminal.

Next, the operation of the vibration motor unit 200 will be described. As the vibration rotor 70 rotates by the electromagnetic force between the magnet 60 and the vibration coil 76 of the vibration rotor 70, the center of gravity of the center of gravity is eccentric. Vibration is generated by this.

That is, since the magnet 60 is composed of permanent magnets, the same magnetic field is always generated. When the current is supplied to the printed circuit board 50 in this state, the applied current is applied to the brush connected to the printed circuit board 50. It is transmitted to the vibration coil 76 through the connection terminal 74 formed in the 52 and the vibrating rotor 70, thereby generating an electric field of a predetermined size in the vibration coil 76, the magnet 60 and the vibration coil At 76, manpower or repulsive force is generated by the mutually interlinking electromagnetic forces.

Then, since the vibrating rotor 70 is coupled to the central axis 72 by the bearing 78, the vibrating rotor 70 rotates in a predetermined direction, and the semicircular vibrating rotor 70 vibrates due to the eccentricity of the center of gravity. Is generated.

In this case, the vibration force may vary depending on the magnitude of the current applied to the vibration coil 76 or the magnitude of the magnetic field of the magnet 60, and may also vary depending on the distance between the vibration coil 76 and the magnet 60. have.

As described above, the present invention can achieve the function of the vibration motor according to the user's selection or request without affecting the output of voice and sound which are inherent characteristics of the speaker, thereby making it possible to slim down and downsize the mobile communication terminal.

In addition, since the present invention can be miniaturized the speaker can be mounted on one side of the mobile communication terminal to secure space, reduce the manufacturing cost of the mobile communication terminal and simplify the manufacturing process.

In addition, since the present invention has a simple structure by reducing the number of parts of the product, the assembly is superior to the conventional products, thereby having excellent productivity and competitiveness. In addition, the vibration force is generated through the rotational movement, there is also an advantage that the vibration force is superior to the conventional products that vibrate while moving up and down.

As described above, the present invention improves the assembly and productivity because the number of parts of the product is reduced, and the vibration force is superior to the vibration force of the conventional vertical vibration because the vibration rotating body is configured to have rotational vibration while rotating by electromagnetic force. In addition, since the vibration motor is integrally configured in the speaker, when applied to a mobile communication terminal, there is an effect that can be slimmed down and downsized by the complex of parts.

Claims (6)

Frame, A protector attached to and fixed to an upper portion of the frame and having a sound outlet; A thin film diaphragm formed between the frame and the protector, the thin film diaphragm having a plurality of electrode patterns formed thereon to allow a current to flow therein; A printed circuit board fixed to the frame and supplying current applied from the outside to the film diaphragm; A magnet of a multipolar magnet, which is formed under the printed circuit board and generates a magnetic field of a predetermined size, A vibrating rotating body installed to rotate eccentrically at a predetermined interval at a lower portion of the magnet and having a vibrating coil electrically connected to the printed circuit board; It is assembled to the outer periphery of the frame and comprises a cover for protecting the inside, The film vibrating plate vibrates up and down by the electromagnetic force generated between the magnet and the film diaphragm to generate an acoustic signal, and the vibration rotating body rotates due to the electromagnetic force generated between the magnet and the vibrating coil of the vibrating rotating body, thereby causing the weight to be eccentric. Vibration motor-integrated speaker, characterized in that to generate a vibration force. The vibration circuit of claim 1, wherein a connection terminal electrically connected to the vibration coil is formed on the vibration rotating body, and a brush connected to the connection terminal is configured on the printed circuit board, so that the current supplied to the printed circuit board is transferred through a brush. Integrated vibration motor speaker, characterized in that applied to the vibration coil. The vibration body of claim 1, wherein the vibration rotating body is formed in a semicircular shape and is coupled to the central axis fixedly installed on the bottom surface of the central portion of the printed circuit board to generate vibration force by eccentricity of weight while rotating. Motor integrated speaker. The speaker of claim 1, wherein the magnet is formed to have four pole magnets. The method of claim 1, wherein the plurality of electrode patterns formed on the film diaphragm are divided into four pattern parts arranged symmetrically with each other, and are connected by one line from the first pattern part to the fourth pattern part, and diagonally when a current is applied. The patterned parts facing each other in a direction are formed to have the same electrode, and the vibration motor-integrated speaker, characterized in that the electrode of the patterned portion is converted in accordance with the current flow direction. The method of claim 5, wherein in the four pattern portion One end of the first pattern portion is connected to apply a current from the printed circuit board, and the other end has a shape wound around the outside, One end of the second pattern portion is connected to the end of the first pattern portion and the other end has a shape wound around the inside, One end of the third pattern portion is connected to the end of the second pattern portion and the other end has a shape wound around the outside, One end of the fourth pattern portion is connected to the end of the third pattern portion, and the other end is wound around the inside of the vibration motor integrated speaker, characterized in that connected to the current through the printed circuit board.