KR20020078332A - Speaker United in Vibration Motor - Google Patents

Abstract

PURPOSE: A speaker incorporated therein a vibration motor is provided to generate a vibration in response to the rotation of an additional rotation body different from a speaker having a vibration body to generate a vibration. CONSTITUTION: A speaker incorporated therein a vibration motor includes a speaker part(100) provided with a protector(20) for outputting a sound, a diaphragm(22) for generating a voice by being vibrated with a sound pressure, a voice coil(23) for vibrating by installed on a lower side of the diaphragm(22) and applying a voice current, a top plate(24) installed in the voice coil(23), a magnet(28) for generating a predetermined size of magnetic field with being configured in a lower side of the top plate(24), a yoke(30) made of an iron core without having a fixed windings on the magnet(28) for outputting a call sound and a vibration motor part(200) a fixing shaft(40) for supporting the top plate(24), a bearing(42) fixedly installed on the fixing shaft(40), a magnet rotation body(43) in the form of flat plate coupled through an outside peripheral of the bearing(42), a voice coil(44) for vibrating the magnet rotation body(43) up and down and a terminal for supplying a current signal applied from outside with being attached to an inner side of the lower cover.

Description

Speaker with integrated vibration motor {Speaker United in Vibration Motor}

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

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.

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 in the cross-sectional view of FIG. 1, the protector 2 which emits a plurality of sounds as the speaker unit 1 and the diaphragm which generates sound by vibration at a sound pressure 5), the voice coil 6 vibrated by the voice current applied to the lower end of the diaphragm 5, the top plate 7 mounted in the voice coil 6, and a magnetic field of a predetermined size. A magnet 10 is generated, a yoke 9 which is an iron core without a fixed winding, and the frame 10 which is configured at the outer circumference of the yoke 9 and is coupled to the protector 2. As the vibration motor unit 13, the speaker unit 1 is located on the lower cover 12 provided with the speaker unit 1 inside, and the lower cover 12 located at the lower end of the yoke 9 of the speaker unit 1. A magnetic field is generated by a current applied fixedly at the center of (12). And a vibration coil 11 for vibrating the speaker unit 1 up and down and between the frame 10 and the lower cover 12 of the speaker unit 1 to maintain the up and down vibration of the speaker unit 1. It includes a vibration diaphragm (4) to make.

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 sound by the vibration of the diaphragm 5 with 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 unit vibrates up and down by the vibration motor when the vibration mode is set to display the call state from the mobile communication terminal. There was a disadvantage that was not recognized.

In addition, since the speaker generates vibration force due to vertical vibration, the vibration diaphragm may be torn or deteriorated to generate sufficient vibration force, and in particular, when the speaker does not exhibit the inherent characteristics of the speaker that should generate sufficient sound pressure. There have been problems such as deterioration and loss of reliability.

The present invention uses a speaker having a vibrating body for vibration, in order to solve the above problems, to provide a vibration motor-integrated speaker that can generate a vibration according to the rotation of a separate rotor from the speaker. There is this.

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,

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

♣ Explanation of symbols for main part of drawing ♣

20: protector 22: diaphragm

23: voice coil 24: top plate

26: bearing 28: magnet

30: York 32: frame

40: fixed shaft 41: lower cover

42: bearing 43: magnet rotating body

44: vibration coil 45: terminal

100: speaker unit 200: vibration motor unit

According to the present invention for achieving the above object, a protector for sound emission, a diaphragm for generating sound by vibration at a sound pressure, a voice coil mounted on the lower end of the diaphragm vibrating by a voice current applied, and The diaphragm includes a top plate mounted in a voice coil, a magnet configured at a lower end of the top plate to generate a magnetic field of a predetermined size, a yoke which is an iron core without a winding in which the magnet is fixed, and an outer circumference of the yoke. A fixed frame and a speaker unit including the fixed frame; It is fixedly installed on the lower cover provided, the other end is fixed shaft for fixing the top plate, a bearing coupled to the fixed shaft, a plate-shaped magnet rotating body to be penetrated through the bearing outer circumference, the magnet It is provided with a vibration coil spaced apart from the rotating body for vibrating the magnet rotating body up and down, and a vibration motor unit including a terminal fixed to one inner side of the lower cover to supply a current signal applied from the outside do.

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

Figure 2 is an exploded perspective view showing a vibration motor integrated speaker according to the present invention, Figure 3 is a cross-sectional view showing the inside by combining the speaker.

According to the present invention, a portable mobile communication terminal includes a speaker for outputting a predetermined sound pressure in order to indicate a reception state of voice and data signals received from a base station or a relay station, and a vibration motor having a predetermined excitation force in a silent mode. Will display this through

The speaker unit 100 outputs a ringing tone of a predetermined size, and can emit sound through the protector 20. The protector 20 prevents the introduction of various foreign substances into the speaker from the outside. Sufficient sound pressure can be maintained.

The normal diaphragm 22 provided in the speaker unit 100 generates sound by vibration at a sound pressure, and a thin synthetic resin material is used and is formed in an arc shape. The voice coil 23 vibrates by a voice current applied to the lower end of the diaphragm 22.

In addition, the top plate 24 is mounted in the voice coil 23, and a magnet 28 for generating a magnetic field of a predetermined size is mounted at the lower end of the top plate 24. The top plate 24 and the magnet 28 are in the form of a disc having a hollow, the bearing 26 is coupled to the hollow of the top plate 24.

In addition, the yoke 30 has a frame 32 in which the magnet 28 is fixed to an iron core having no winding, and the diaphragm 22 is fixed to the outer periphery of the yoke 30.

The vibration motor unit 200 is coupled to the center of one end of the top plate 24 of the speaker unit 100, and the other end is fixed to the inner bottom surface of the lower cover 41 for receiving the speaker unit 100 ( 40 is installed, the bearing 42 is coupled to the predetermined position of the fixed shaft 40, the plate magnet magnet rotating body 43 is coupled to the outer periphery of the bearing 42, the lower cover ( 41 is provided on the inner bottom surface of the vibration coil 44 which is vibrated up and down by the rotation of the magnet rotor 43 is spaced apart.

The magnet rotating body 43 is formed by alternating the N pole and the S pole in a plane, so that the vibration coil 44 for the perpendicular rotation about the fixed shaft 40 may have a vibration. The plate shape may have a deviation from a circular shape or a thickness of a predetermined portion to realize a vibration condition of the magnet rotating body rotated from the vibration coil according to asymmetry.

That is, the rotor can be used as a conventional rotor having a magnet and a conventional vibration structure.

The terminal 45 is fixed to one inner side of the lower cover 41 to supply a current signal applied from the outside.

Referring to the operation and effects on the vibration motor integrated speaker of the present invention configured as described above are as follows.

First, the speaker unit 100 operates in the same manner as the driving principle of a general speaker. Since the magnet 28 applies a permanent magnet, the same magnetic flux is formed in the top plate 24 and the voice coil 23. At this time, when a voice current is applied to the voice coil 23 of the speaker unit 100, the electromagnetic force is actuated by the change of the electric field, and the voice coil 23 is integrally formed with the diaphragm 22, and thus the voice coil 23. The diaphragm 22 is vibrated by the electromagnetic force of). Therefore, a predetermined voice or sound is generated. The voice current is applied through the terminal 45 from the control circuit of the mobile communication terminal.

On the other hand, referring to the operation of the vibration motor unit 200 generated before the speaker unit 100 is operated, induction current is applied to the vibration coil 44 installed on the lower cover 41 separately from the operation of the speaker unit. From the fixed shaft 40 fixed to the center of the speaker unit 100 and the center of the lower cover in the state, the magnet rotor 43 is rotated due to the induction current of the vibration coil.

At this time, the rotating magnet rotor 43 is coupled to the bearing 42 on the fixed shaft 40, and rotates together with the bearing 42 in any one direction, the polarity on the magnet rotor 43 is one plate The polarity is generated alternately, and the vibration is generated by the formation of the magnetic field of the induced current.

The vibration of the magnet rotating body 43 is a current applied through the terminal 45 is input to the vibration coil so that the vibration coil 44 generates an electric field of a predetermined size, and the vibration magnet rotating body 43 and The vibration coil 44 generates attractive force or repulsive force by electromagnetic force orthogonal to each other.

Accordingly, the vibration motor part 200 having the vibrating magnet rotating body 43 and the elements of the vibrating coil 44 may include a bearing 42 and a magnet rotating body 43 rotatably coupled to the fixed shaft 40. In rotation of, vibrations are generated by alternately converting the induced current directions of the corresponding vibration coils due to the intersection of different polarities. The vibration force rotated according to the magnitude of the current applied to the vibration coil 44 or the magnitude of the magnetic field of the vibrating magnet rotating body 43 depends on the degree of asymmetry of the magnet rotating body, the size of the vibration coil, and the applied power. Can vary.

As such, the vibration motor function can be promoted according to a user's selection or request without affecting the output of voice and sound, which are inherent in the speaker, and can reduce the size of the terminal.

As described above, the speaker to which the vibration motor of the present invention is coupled is fixed by an eccentric speaker composed of a protector, a diaphragm, a voice coil, a top plate, a magnet, a yoke, and a frame, and a vibration coil electromagnetic force installed at a lower end of the frame. Compared to the conventional speaker, in which the magnet rotating body coupled to the shaft is rotated to rotate, the speaker unit vibrates up and down, and the speaker unit operates only the vibration motor unit at the same time as general use to obtain vibration force. By providing a speaker having a vibration force superior to the vibration force caused by the vibration it is possible to apply the product by the composite of the components of the mobile communication terminal.

The present invention may be sufficiently modified, converted, substituted, and replaced in consideration of the present invention, and the present invention is not limited thereto.

Claims (2)

Protectors for sound emission, Diaphragm to generate sound by vibration at sound pressure, A voice coil mounted on a lower end of the diaphragm and vibrating by a voice current applied thereto; A top plate mounted in the voice coil, A magnet configured at a lower end of the top plate to generate a magnetic field of a predetermined size; The yoke is a core without a fixed wire fixed to the magnet, A frame configured at an outer circumference of the yoke and having a diaphragm fixed thereto; A speaker unit including the call sound; It is fixed to the lower cover is provided, the other end and the fixed shaft for fixing the top plate, A bearing coupled to the fixed shaft; A plate-shaped magnet rotator coupled to the outer circumference of the bearing, A vibration coil installed below the magnet rotator to vibrate the magnet rotator up and down; And a vibration motor unit including a terminal fixed to one inner side of the lower cover to supply a current signal applied from the outside. The vibration motor-integrated speaker according to claim 1, wherein at least two poles of polarity are formed in the magnet rotating body, and asymmetrically coupled to the fixed shaft.