KR20020071381A - Speaker United in Vibration Motor - Google Patents

Abstract

PURPOSE: A vibration motor built-in speaker is provided to generate an oscillation by using a rotational oscillation of a speaker having the eccentricity without an up-and-down oscillation of the speaker. CONSTITUTION: A speaker unit(100) outputs a calling sound. A vibration motor unit(200) rotates the speaker unit(100) having the eccentricity to generate an oscillation of the speaker unit(100). A protector(20) is provided with a plurality of a sound outlet hole. A diaphragm(22) generates sound by using the oscillation of sound pressure. A voice coil(23) is mounted on a lower end of the diaphragm(22) and vibrated by an applied voice current. A top plate(24) is mounted within the voice coil(23). Magnets(28,34) are provided on a lower end of the top plate(24) and generate a predetermined magnetic field. The magnets(28,34) are fixed to a yoke(30) without being wounded. A frame(32) is provided on an external circumference of the yoke(30). The diaphragm(22) is fixed to the frame(32).

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 in which the plurality of sound emission ports 3 are formed as the speaker unit 1 and the sound by vibration with sound pressure are provided. A generated diaphragm 5, a voice coil 6 oscillated by a voice current mounted on the lower end of the diaphragm 5, a top plate 7 mounted in the voice coil 6, and a predetermined A magnet 8 generating a magnetic field of magnitude, a yoke 9 which is an iron core without a fixed winding, and a frame configured at the outer periphery of the yoke 9 and coupled with the protector 2. (10), the vibration motor unit 13, the speaker unit 1, the lower cover 12 provided with the speaker unit 1 inside, and the lower end of the yoke 9 of the speaker unit 1 Is located in the magnetic field of the lower cover 12 by a current applied fixedly A vibration coil 11 for generating and vibrating the speaker unit 1 up and down, and connected between the frame 10 of the speaker unit 1 and the lower cover 12 to generate vertical vibration of the speaker unit 1. Vibration diaphragm 4 for holding is included.

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 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 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, in order to solve the above problems, using a speaker as a vibrating body for vibration, but provides a vibration motor-integrated speaker that can generate vibration by rotational vibration of the speaker having an eccentric rather than up and down vibration of the speaker The purpose is to.

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

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 21: sound outlet

22: diaphragm 23: voice coil

24: top plate 26: bearing

28, 34: Magnet 30: York

32: frame 36: vibration coil

38: terminal 40: rotational axis

42: lower cover 100: speaker unit

200: vibration motor unit

In order to achieve the above object, the present invention provides a speaker having a vibration motor integrated with a speaker unit for outputting a ringing sound, and a vibration motor unit for generating vibration by rotating the eccentric speaker unit.

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

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

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. To indicate this.

The speaker unit 100 outputs a ringing tone of a predetermined size, and the protector 20 is provided with a plurality of sound discharge ports 21, and prevents a variety of foreign substances from entering the speaker from the outside and at a sufficient sound pressure. The sound emitted by being able to maintain the sound is output through the sound emission port 21.

The diaphragm 22 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.

Vibration motor unit 200 is coupled to the lower end of the frame 32 is composed of an annular vibration magnet 34 is fixed, the speaker unit 100 is provided with a lower cover 42 provided on the inside. In addition, there is provided a ring-shaped vibration coil 36 installed at right angles to the vibration magnet 34 and mounted on the inner wall surface of the lower cover 42 to generate an electric field of a predetermined size with an applied current. A cylindrical rotation center shaft 40 is fixed to the center of the cover 42 and penetrates the yoke 30 and the magnet 28 and connected to the top plate 24 and the bearing 26 at the upper end thereof. The terminal 38 is fixed to one inner side of the 42 to supply a current signal applied from the outside.

The speaker unit 100 is an eccentric body having one side eccentric, and the speaker unit 100 is asymmetrically mounted about the rotation center axis 40, or one side of the yoke 30 or the frame 32 is thickened. It is preferable to form or have a large weight, or to separately configure an eccentric body having a predetermined weight on one side of the speaker unit 100.

According to the present invention configured as described above, 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 38 from the control circuit of the mobile communication terminal.

On the other hand, the operation of the vibration motor 200, that is, the vibration magnet 34 mounted on the lower end of the frame 32 of the speaker unit 100, and the vibration coil 36 mounted on the inner circumference of the lower cover 42 Vibration caused by electromagnetic force). This is because the vibrating magnet 34 mounted on the bottom of the frame 32 is composed of a permanent magnet, the magnet 28 will always generate the same magnetic field, at this time, the current applied through the terminal 38 is the vibration coil Since the vibration coil 36 generates an electric field having a predetermined size, the vibration magnet 36 and the vibration coil 36 generate an attractive force or repulsive force by electromagnetic forces that cross each other.

Therefore, the eccentric speaker unit 100 to which the vibration magnet 34 is attached is coupled to the rotational central shaft 40 by a bearing 26 to generate vibration by rotating in a predetermined direction. The rotating force increases according to the magnitude of the current applied to the vibration coil 36 or the magnitude of the magnetic field of the vibration magnet 34, and rotates according to the sizes of the vibration coil 36 and the vibration magnet 34. The vibration force varies, and the vibration force may vary depending on the distance between the vibration coil 36 and the vibration magnet 34.

Rotation of the speaker unit 100 is performed by sliding of the bearing 26 coupled to the central axis of rotation 40.

As such, the vibration motor can be designed according to the user's selection or request without affecting the output of voice and sound, which are inherent in the speaker, thereby making it possible to slim down and downsize the mobile communication terminal.

As described above, the speaker to which the vibration motor of the present invention is coupled includes 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 magnet mounted at a lower end of the frame with a predetermined distance. The speaker coupled to the rotating central axis by the electromagnetic force of the vibration coil coupled to the inner circumference of the lower cover is configured to rotate the vibration, combined with a vibration motor having a vibration force superior to that of the conventional vertical vibration Providing a speaker has the effect of slimming and miniaturization 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 (5)

Speaker unit which outputs a ring tone, Vibration motor-integrated speaker, characterized in that the vibration motor unit for generating vibration by rotating the eccentric speaker unit is integrally coupled. The method of claim 1, wherein the speaker unit A protector having a plurality of sound outlets, 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, Vibration motor-integrated speaker, characterized in that the frame is configured on the outer periphery of the yoke and the diaphragm is fixed. The vibration motor of claim 1 or 2, wherein the vibration motor unit A vibration magnet fixed to the bottom of the frame, A lower cover provided inside the speaker unit; A vibration coil installed at right angles to the vibration magnet and mounted on an inner wall of the lower cover to generate an electric field of a predetermined size with an applied current; A rotating central shaft fixed to the center portion of the lower cover and penetrating through the yoke and the magnet and connected to the top plate and the bearing at the top; The vibration motor-integrated speaker, characterized in that the terminal is fixed to one inner side of the lower cover to supply a current signal applied from the outside. The speaker of claim 1 or 3, wherein the speaker unit rotates by an electric field of a vibration coil orthogonal to the magnetic flux of the magnet fixed to the lower end of the frame. According to claim 1 or claim 3, wherein the speaker unit is one side of the eccentric body having an eccentric, the speaker unit is mounted asymmetrically about the central axis of rotation, or one side of the yoke or frame is formed thick or heavy Or any one of separately mounting an eccentric body having a predetermined weight on one side of the speaker unit is applied.