KR20100111368A - Vibration device - Google Patents

Abstract

PURPOSE: A vibration device is provided to reduce a time when the vibration of a mass is stopped by forming a damping magnet to be opposite to a magnet. CONSTITUTION: A vibrator is arranged inside a case. A coil(22) is arranged in the lower part of the vibrator. The coil is supported by the case. A spring(30) enables the vibrator to be elastically supported. A damping magnet is installed in cases(10,20) and is opposite to the magnet. The polarity of the opposite side facing the magnet is same as a side facing the damping magnet.

Description

Vibration Device {VIBRATION DEVICE}

Embodiments relate to a vibration device.

The vibration device may be used in various electronic devices such as a mobile communication terminal, a speaker, and a video game device.

Typically, the vibration device provides a vibration function for the incoming call notification or signal input notification in the mobile communication terminal. The vibration device generates vibration in the mobile communication terminal by transmitting the vibration of the mass body elastically supported by the spring to the outside.

On the other hand, since the vibration device uses the resonance phenomenon of the spring and the mass body, damping to prevent the mass body from hitting the case and to shorten the time taken to stop the vibration of the mass body when the vibration device is stopped. Means are needed.

The embodiment provides a vibration device of a new structure.

The embodiment provides a vibrating device capable of shortening the time at which vibration of the mass is stopped.

Vibration device according to an embodiment is a case; A vibrating body disposed inside the case and including a magnet, a yoke and a mass body; A coil disposed below the vibrating body and supported by the case; A spring to elastically support the vibrating body in the case; And a damping magnet installed in the case to face the magnet, and the magnetic pole of the face of the damping magnet facing the magnet is the same as the magnetic pole of the face of the magnet opposite the damping magnet.

Vibration device according to an embodiment is a case; A vibrating body disposed inside the case and including a magnet, a yoke and a mass body; A coil disposed below the vibrating body and supported by the case; A spring to elastically support the vibrating body in the case; And a damping magnetic body installed in the case.

The embodiment can provide a vibration device of a new structure.

The embodiment can provide a vibration device capable of shortening the time at which vibration of the mass is stopped.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

Hereinafter, the vibration device according to the embodiments will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a vibration device according to the first embodiment, Figure 2 is an exploded perspective view of the vibration device according to the first embodiment. In FIG. 2, the upper case 10 and the yoke 14 are shown in a cutaway view.

1 and 2, the vibration device according to the first embodiment includes an upper case 10, a lower case 20, a spring 30, a mass body 12, a magnet 13, a yoke 14, Coil 22 is included.

The upper case 10 and the lower case 20 are coupled to each other to define the internal space of the vibration device. The upper case 10 and the lower case 20 protects the internal parts of the vibration device, so that the vibration generated in the vibration device can be transmitted to the external device.

The upper case 10 and the lower case 20 may be formed of the same material or different materials. For example, the upper case 10 may be formed of a nonmagnetic material, and the lower case 20 may be formed of a printed circuit board (PCB).

One side of the spring 30 is coupled to the upper case 10, and the other side of the spring 30 is coupled to the yoke 14.

The mass 12 is coupled to the outside of the yoke 14, and the magnet 13 is installed to the inside of the yoke 14.

The mass 12 is formed in a ring shape and coupled to the outer side of the yoke 14, and the lower side of the outer side of the yoke 14 protrudes in the direction in which the mass 12 is disposed. That is, the lower part of the outer surface of the yoke 14 is larger in diameter than the upper part of the outer surface so that a part of the yoke 14 and a part of the mass 12 are disposed on the same vertical plane. Therefore, the yoke 14 can support the mass 12 more firmly.

The magnet 13 is formed in a circular plate shape, the side surface of the magnet 13 is spaced apart from the inner surface of the yoke 14 by a predetermined distance (t1). The distance t1 between the magnet 13 and the yoke 14 inner surface is formed to be wider than the width t2 of the ring-shaped coil 22.

On the other hand, in the process of vibrating the vibrating body 40 including the mass 12, the magnet 13 and the yoke 14 in the vertical direction, when the vibrating body 40 is moved to the lower side of the coil ( 22 is located in the space between the magnet 13 and yoke 14.

Therefore, the vibrator 40 does not collide with the coil 22 even if it vibrates in the up and down direction. This means that the vertical vibration width of the vibrating body 40 can be increased by the height of the coil 22. Therefore, the vibration device can be made thinner, and the vibration amount can be increased.

In other words, the vibration width of the vibrating body 40 may not be limited in order to prevent the vibrating body 40 and the coil 22 from colliding, so that the vibration amount of the vibrating body 40 may be increased. . That is, since the vibration width of the vibration body 40 is not limited by the height of the coil 22, the vibration device can be made thinner and the vibration amount can be increased.

The lower case 20 is provided with a circuit board 21, a first damping magnet 23, and a coil 22.

The printed circuit board 21 may be a flexible printed circuit board (FPCB), and provides driving power to the coil 22.

The first damping magnet 23 is formed in a circular plate shape and is installed to face the magnet 13. The first damping magnet 23 prevents the magnet 13 from colliding with the lower case 20 to prevent noise and shortens the time for the vibration of the vibrator 40 to stop.

For example, when the N and S poles are arranged in the vertical direction of the magnet 13, the S and N poles of the first damping magnet 23 are arranged in the vertical direction. Therefore, when the operation of the vibration device is stopped, when the magnet 13 vibrates up and down by the elastic force of the spring 30, the first damping magnet 23 is the same as the magnet 13 Since the polarity is faced to reduce the force to move the magnet 13 in the downward direction so that the vibration of the vibrating body 40 is stopped quickly.

A magnetic fluid 11 is formed on an upper surface of the vibrating body 40 to which the spring 30 is connected, and the magnetic fluid 11 reduces contact noise generated during vertical movement. Although not shown, the magnetic fluid 11 may be formed on the bottom surface of the magnet 13, or may be formed on the bottom surface of the magnet 13 and the top surface of the vibrator 40.

Meanwhile, an opening 17, a shielding member 18, and a second damping magnet 19 are formed in the upper case 10.

The opening 17 is used for welding the spring 30 and the yoke 14 in the assembling process of the vibrating device, and the shielding member 18 is the opening 17 after the assembling of the vibrating device is completed. Through the foreign matter to block the introduction of the vibration device.

In addition, the second damping magnet 19 is formed in a ring shape to prevent the vibration body 40 and the upper case 10 from colliding with each other like the first damping magnet 23, thereby preventing noise. The time for which the vibration of the vibrating body 40 is stopped is shortened.

For example, when the magnet 13 has the N side and the S pole arranged in the vertical direction, the second damping magnet 19 has the S pole and the N pole arranged in the vertical direction. Therefore, when the operation of the vibration device is stopped, when the magnet 13 vibrates up and down by the elastic force of the spring 30, the second damping magnet 19 is the first damping magnet 19 Like), the vibration of the vibrating body 40 is quickly stopped.

The vibrating device as described above is vibrating body 40 by the interaction of the electric force of a predetermined frequency generated in the coil 22 and the magnetic force generated in the magnet 13 as power is applied to the coil 22 It vibrates in the vertical direction.

In addition, the first damping magnet 23 and / or the second damping magnet 19 provide the vibration body 40 as a damping means.

Meanwhile, although the first damping magnet 23 and the second damping magnet 19 are formed in the first embodiment, only one of the first damping magnet 23 and the second damping magnet 19 is formed. It is also possible.

3 is a cross-sectional view of the vibration device according to the second embodiment, Figure 4 is an exploded perspective view of the vibration device according to the second embodiment. In FIG. 4, the upper case 10 and the yoke 14 are shown in a cutaway view.

However, in describing the vibration device according to the second embodiment, descriptions overlapping with the description of the vibration device according to the first embodiment will be omitted.

3 and 4, the vibration device according to the second embodiment includes an upper case 10, a lower case 20, a spring 30, a mass body 12, a magnet 13, a yoke 14, The coil 22 and the damping magnetic material 24 are included.

The upper case 10 and the lower case 20 are coupled to each other to define the internal space of the vibration device. The upper case 10 has an opening 17, a shielding member 18, and a second damping magnet 19, and the lower case 20 has a circuit board 21, a damping magnetic body 24, and a coil ( 22) is installed.

One side of the spring 30 is coupled to the upper case 10, and the other side of the spring 30 is coupled to the yoke 14.

The mass 12 is coupled to the outside of the yoke 14, and the magnet 13 is installed to the inside of the yoke 14.

The magnet 13 is formed in a circular plate shape, the side surface of the magnet 13 is spaced apart from the inner surface of the yoke 14 by a predetermined distance (t1). The distance t1 between the magnet 13 and the inner surface of the yoke 14 is wider than the width t2 of the damping magnetic material 24 and the coil 22.

On the other hand, in the process of vibrating the vibrating body 40 including the mass 12, the magnet 13 and the yoke 14 in the vertical direction, the damping field when the vibrating body 40 is moved to the lower side An adult 24 and a coil 22 are located in the space between the magnet 13 and the yoke 14.

The damping magnetic body 24 is to shorten the time that the vibration of the vibrating body 40 is stopped by the magnetic force of the magnet (13).

For example, when the operation of the vibration device is stopped, when the magnet 13 vibrates up and down by the elastic force of the spring 30, the damping magnetic material 24 has the magnet 13 upside. When moving in the direction to generate a force to attract the magnet 13 to reduce the restoring force of the spring 30, thereby to show the characteristics to move the magnet 13 in the downward direction.

In addition, the damping magnetic material 24 generates a force to attract the magnet 13 when the magnet 13 moves downward, thereby increasing the restoring force of the spring 30, and thus the magnet 13 ) Indicates the characteristic of moving upward.

As a result, the damping magnetic material 24 reduces the force of the magnet 13 to move in the vertical direction so that the vibration of the vibrating body 40 can be stopped quickly.

Meanwhile, as in the first embodiment, a magnetic fluid 11 may be formed on an upper surface of the vibrating body 40 to which the spring 30 is connected, and the second damping magnet 19 is formed in the upper case 10. Can be installed.

In addition, although not shown, the lower case 20 may be provided with a first damping magnet as in the first embodiment.

Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention does not exemplify the above within the scope not departing from the essential characteristics of this embodiment It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is a cross-sectional view of a vibration device according to the first embodiment.

2 is an exploded perspective view of the vibration device according to the first embodiment;

3 is a sectional view of a vibration device according to a second embodiment;

4 is an exploded perspective view of the vibration device according to the second embodiment;

Claims (12)

case; A vibrating body disposed inside the case and including a magnet, a yoke and a mass body; A coil disposed below the vibrating body and supported by the case; A spring to elastically support the vibrating body in the case; And A damping magnet installed in the case and facing the magnet, And the magnetic pole of the face of the damping magnet facing the magnet is the same as the magnetic pole of the face of the damping magnet facing the magnet. The method of claim 1, The case includes an upper case and a lower case coupled to the upper case. 3. The method of claim 2, The coil is installed in the lower case, the spring is installed in the upper case. 3. The method of claim 2, The damping magnet includes at least one of a first damping magnet installed in the lower case and a second damping magnet installed in the upper case. The method of claim 4, wherein And the first damping magnet is formed in a circular plate shape and disposed inside the coil. The method of claim 4, wherein The second damping magnet is a vibration device formed in a ring shape. case; A vibrating body disposed inside the case and including a magnet, a yoke and a mass body; A coil disposed below the vibrating body and supported by the case; A spring to elastically support the vibrating body in the case; And Vibration device comprising a damping magnetic material installed in the case. The method of claim 7, wherein The case includes an upper case and a lower case coupled to the upper case. The method of claim 7, wherein The coil is formed in a ring shape, the damping magnetic material is formed in a ring shape is disposed on the inside of the coil. The method of claim 9, And the magnet is positioned radially inward of the damping magnetic body when the magnet is moved downward. The method of claim 8, The coil is installed in the lower case, the spring is installed in the upper case. The method of claim 8, The damping magnetic body is a vibration device installed in the lower case.

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