KR101783645B1 - Linear type vibration motor vibrated Verticality - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear type vertical vibration motor, and more particularly, to a linear type vertical vibration motor having an effect of improving a vibration response speed (rising time, falling time).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a linear type vibration motor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear type vertical vibration motor, and more particularly, to a linear type vertical vibration motor having an effect of improving a vibration response speed (rising time, falling time).

2. Description of the Related Art Recently, with the rapid development of wireless communication technology, portable communication devices are getting smaller and lighter, and components including device devices, IC chips, and circuits mounted inside portable communication devices have become highly integrated and high- It has become necessary to evolve the size and shape in order to increase the space utilization.

In addition, a vibration motor mounted inside a portable communication device to inform the user of an incoming call due to a silent vibration has been studied in accordance with the above-mentioned trends.

The initial models of the vibration motor mounted inside the portable communication device were in the form of a rotary type vibration motor having a stator and a rotor as a basic constitution. The rotary type vibration motor fixes the shaft to the bracket of the stator, rotates the rotor on the shaft In order to improve the vibration power, the volume of the rotor is increased or the number of revolutions is increased to improve the vibration power. However, due to the structural problem, not only miniaturization but also difficulty in generating high vibration And the lifetime can not be guaranteed over a certain period of time.

In order to solve the problem of the above-described rotary type vibration motor, a vertical vibration type actuator vibration motor has been proposed recently.

The upper and lower vibration type actuator vibration motors include upper and lower cases which are opposed to each other, magnetic force generating means formed on at least one surface of the upper case and the lower case, a magnet to which a force or a repulsive force opposing the magnetic force generating means is applied, An elastic means for elastically supporting a heavy object placed on at least one side of at least one of the upper and lower surfaces of the heavy object, And a fixing member for fixing to the case and the lower case.

Such a vertical vibration type actuator vibration motor is widely used in recent years because it has an advantage of being able to extend the service life and to overcome the limitation of the size of the rotary type vibration motor.

On the other hand, in the vertical vibration type vibration motor, the life of the vibration motor can be improved by preventing the internal parts from being affected by the vibration body, and as the vibration force of the vibration body is improved, There is a continuing need for the development of vibration motors with improved durability and vibration power.

In addition, since vibration motors are widely used for various purposes, development of vibration motors having fast vibration response time (vibration start time, vibration stop time) is also continuously required.

Korean Patent Publication No. 10-2010-0073301 (2010. 07. 01.)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a linear type vertical vibration motor having improved vibration response speed (rising time, falling time).

According to an aspect of the present invention,

In a vibration motor comprising a bracket 10, an F-PCB 20, a coil 30, a main yoke 40, a spring 90 and a case 110,

A yoke insertion groove is formed at the center of the F-PCB 20, the coil 30 and the main yoke 40, and a center of the protruded bottom of the main yoke 40 is inserted. A bracket (10) for engaging;

An F-PCB 20 coupled to the inner plane of the bracket 10 and the yoke insertion groove to supply an external power source to the coil;

A coil 30 mounted on the plane of the F-PCB 20 and around the yoke insertion groove to generate vertical vibration by the action of the magnet;

The center of the bottom surface of the coil 30 is inserted into a yoke insertion groove formed at the center of the bracket 10 and penetrates through the coil 30, A main yoke (40) concentrating a flow of an internal magnetic field;

A spring (90) coupled to a bottom surface of the case (110) to provide elasticity for amplifying vibration and to determine a resonance frequency;

And a case 110 coupled to the periphery of the bracket 10 to form an outer periphery of the vertical vibration motor.

Therefore,

It is possible to provide a linear type vertical vibration motor with improved vibration response speed (rising time, falling time).

1 is an exploded perspective view of a linear type vertical vibration motor in which a vibration response speed is improved according to an embodiment of the present invention.
2 is an assembled cross-sectional view of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
3 is a view showing a magnetic direction when an AC signal is applied to a linear type vertical vibration motor having an improved vibration response speed according to an embodiment of the present invention.
4 is a view showing the magnetic direction when the AC signal applied to the linear type up-and-down vibration motor with improved vibration response speed is cut off according to an embodiment of the present invention.
5 is a view showing an example in which a magnetic fluid is applied to a spring and a magnet of a linear type vertical vibration motor having an improved vibration response speed according to an embodiment of the present invention.
FIG. 6 is an exploded perspective view showing a combined state of a case, a spring, and a sub yoke of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
7 is a exploded perspective view illustrating a coupling structure of a case, a spring, and a sub yoke of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
8 to 10 are views showing various examples of the configuration of a sub yoke of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
11 is an exploded perspective view showing a combined state of a case and a spring of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
12 is an exploded perspective view showing a coupling structure of a case and a spring of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
13 is an assembled cross-sectional view showing a coupling structure of a case and a spring of a linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention.
14 is a view showing the magnetic direction when the AC signal applied to the vertical vibration motor according to the configuration example of Figs. 11 to 13 of the linear type vertical vibration motor with improved vibration response speed according to the embodiment of the present invention is blocked to be.
FIG. 15 is a sectional view showing the structure of a conventional vertical vibration motor. FIG.
FIG. 16 is a graph showing a required rising time until the vibration force of the conventional vibration motor of FIG. 15 reaches Half (50%) versus the maximum (100%).
FIG. 17 is a graph showing the rising time until the vibration force of the linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention reaches Half (50%) versus the maximum (100%).
FIG. 18 is a graph showing the falling time required until the vibration force of the conventional vibration motor of FIG. 15 reaches Half (50%) versus the maximum (100%).
FIG. 19 is a graph showing a falling time required until the vibration force of the linear type vertical vibration motor with improved vibration response speed according to an embodiment of the present invention reaches Half (50%) to Maximum (100%).

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described by way of example only and with reference to the accompanying drawings, in which: FIG. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. .

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present invention, the term "comprises" or "having ", etc. is intended to specify that there is a feature, number, step, operation, element, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

Referring to Figures 1 and 2,

The present invention includes a bracket 10, an F-PCB 20, a coil 30, a main yoke 40, a plate 50, a magnet 60, a damper 70, a weight 80, A sub yoke 100 and a case 110. The plate 50, the magnet 60 and the weight 80 are vibrating bodies.

More specifically,

A yoke insertion groove is formed at the center of the F-PCB 20, the coil 30 and the main yoke 40, and a center of the protruded bottom of the main yoke 40 is inserted. A bracket 10 for coupling,

An F-PCB 20 coupled to the inner plane of the bracket 10 and the yoke insertion groove to supply external power to the coils,

A coil 30 mounted on the plane of the F-PCB 20 and around the yoke insertion groove to generate vertical vibration by the action of the magnet,

And a center of the bottom surface of the coil 30 is inserted into a yoke insertion groove formed at the center of the bracket 10 and penetrates the coil 30, A main yoke 40 for concentrating the flow of the internal magnetic field,

A plate 50 coupled to the bottom surface of the weight 80 and the bottom surface of the magnet 60 to concentrate the magnetic force,

A magnet 60 coupled to the inner periphery of the weight 80 and generating a magnetic field by the action of the coil 30 to generate vertical vibration,

The vibration body is not brought into direct contact with the bracket 10, the F-PCB 20, or the like when the up-and-down vibration is generated by the magnetic field and is absorbed by the vibrator, A damper 70 configured to adjust vibration of the vibrating body and to suppress generation of vibration noise due to vibration of the vibrating body,

A weight (80) coupled to an outer bottom surface of the spring and configured to amplify vibration by its own weight,

A spring 90 coupled to the bottom surface of the case 110 to provide elasticity for amplifying vibration and to determine a resonance frequency,

A sub yoke 100 which is coupled to the center of the case 110 and generates attraction as a magnetic body by the action of the magnet 60,

And a case 110 coupled to the periphery of the bracket 10 to form an outer periphery of the vertical vibration motor.

6 to 7,

At this time, a through hole 91 through which the coupling protrusion 101 passes is formed at the center of the spring 90.

At this time, a coupling protrusion 101 protruding upward is formed at the center of the plane of the sub yoke 100.

At this time, a coupling hole 111 is formed at the center of the case 110 to be engaged with the coupling protrusion 101 of the sub yoke 100.

The spring 90 is disposed between the sub yoke 100 and the case 110 so that the coupling protrusion 101 of the sub yoke 100 is inserted through the through hole 90 of the spring 90, And the spring 90 and the sub yoke 100 are coupled to the case 110 by fitting the coupling hole 111 of the case 110 after passing through the hole 91. [

Referring to FIG. 8,

The circumferential surface of the engaging projection 101 of the sub yoke 100 may be formed with a flange portion 102 that improves surface adhesion when the spring 90 and the case 110 are brought into contact with each other .

9 to 10,

At this time, the lower portion of the sub yoke 100 is formed so that a plurality of protrusions protruding outward along the circumference are radially arranged to improve the assemblability when the spring 90 and the case 110 are coupled with each other .

3 to 4,

3, when the AC signal is applied, the vibrator vibrates due to the action of the coil 30, the main yoke 40, and the magnet 60,

As shown in FIG. 4, when the applied AC signal is cut off, the residual vibration of the vibrating body is caught by the attraction force between the magnet 60 and the sub yoke 100, ) Can be shortened.

11 to 13,

At this time, a protrusion 112 may be formed at the center of the case 110 so as to be bent to protrude downward.

At this time, the protrusion 112 may be configured to perform the function of the sub yoke 100 instead of the sub yoke 100, and may be formed of a magnetic material.

At this time, a through hole 91 may be formed at the center of the spring 90 to be engaged with the protrusion 112.

The spring 90 is inserted into the case 110 by fitting the protrusion 112 of the case 110 into the through hole 91 of the spring 90 without the sub yoke 100, It is possible to further provide an effect of simplifying the assembling process.

14,

When the AC signal is applied, the vibrator is vibrated by the action of the coil 30 and the main yoke 40 and the magnet 60,

As shown in FIG. 14, when the applied AC signal is cut off, the attraction force between the magnet 60 and the protruding portion 112 of the case 110 catches the vibration of the vibrating body more quickly, It is possible to provide an effect of shortening the Falling Time.

Fig. 15 is an engagement sectional view showing the structure of a conventional vertical vibration motor,

A magnet is coupled to the center of the case, and a coil, a weight, and a plate are formed outside the magnet to form a vibrating body, thereby oscillating to the outside of the magnet.

16 to 17,

FIG. 16 is a graph showing the rising time until the vibration power of the conventional sub yoke-free vibration motor of FIG. 15 reaches Half (50%) versus the maximum (100%), (Equipment: BAKO 2120C) showing the time required for the vibration force of the linear type up-and-down vibration motor having improved vibration response speed according to the embodiment to reach the Half (50%) relative to the maximum (100%

(100%) of the linear type up-and-down vibration motor of which the vibration response speed of the present invention is improved compared to the conventional example of the vibration speed of the sub-yoke-free vibration motor having a Rising Time of 23 m / It can be seen that the half time (50%) reaching Rising Time is 8 m / s, which provides a 65% increase in Rising Time improvement compared to a conventional sub yoke free vibration motor.

18 to 19,

FIG. 18 is a diagram showing the falling time required until the vibration power of the conventional sub yoke-free vibration motor of FIG. 15 reaches Half (50%) versus the maximum (100%), (Equipment: BAKO 2120C) showing the falling time until the vibration force of the linear type vertical vibration motor with improved vibration response speed according to the embodiment reaches Half (50%) relative to the maximum (100%),

The vibration response speed according to the embodiment of the present invention is lower than the vibration response speed of the vibration motor according to the embodiment of the present invention, while the falling time required until the vibration force of the vibration motor without the sub yoke of the related art reaches Half (50% The falling time required to reach Half (50%) compared to the maximum (100%) of the improved linear type vertical vibration motor is 13 m / s, and the falling time improvement rate is about 67% It can be understood that the effect is provided.

At this time,

5, when the magnetic fluid F is applied between the main yoke 40 and the magnet 60, the vibration of the magnetic fluid F at the time of stopping the vibration causes the vibration stop time Falling Time ). ≪ / RTI >

On at least one of the plane of the bracket 10, the plane of the F-PCB 20, the plane of the weight 80, the plane of the magnet 60, and the bottom of the plate 50, , The vibration body is not in direct contact with the bracket 10, the F-PCB 20 or the like and absorbs the impact caused by the vibrating body when the vertical vibration is generated by the magnetic field, A damper 70 configured to suppress the generation of vibration noise can be further combined.

The magnetic field of the magnet 60 is concentrated on at least one of the flat surface and the bottom surface of the magnet 60 so that the concentrated magnetic field interacts with the coil 30 at the time of vertical vibration, The plate 50 is configured to be further coupled.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is not.

10: Bracket
20: F-PCB
30: Coil
40: Main York
50: Plate
60: Magnet
70: Damper
80: Weight
90: spring
100: Sub yoke
110: Case

Claims (2)

In a vibration motor comprising a bracket 10, an F-PCB 20, a coil 30, a main yoke 40, a spring 90 and a case 110,
A yoke insertion groove is formed at the center of the F-PCB 20, the coil 30 and the main yoke 40, and a center of the protruded bottom of the main yoke 40 is inserted. A bracket (10) for engaging;
An F-PCB 20 coupled to the inner plane of the bracket 10 and the yoke insertion groove to supply an external power source to the coil;
A coil 30 mounted on the plane of the F-PCB 20 and around the yoke insertion groove to generate vertical vibration by the action of the magnet;
And a center of the bottom surface is T-shaped protruded downward. The center of the protruded bottom surface penetrates through the coil 30 and is engaged with the bracket 10 to concentrate the flow of the internal magnetic field of the coil 30, (40);
A spring (90) coupled to a bottom surface of the case (110) to provide elasticity for amplifying vibration and to determine a resonance frequency;
And a case 110 coupled to the periphery of the bracket 10 to form an outer periphery of the vertical vibration motor,
And a sub yoke (100) coupled to the center of the case (110) and generating attraction as a magnetic body by the action of the magnet (60)
A through hole 91 formed at the center of the spring 90 and through which the coupling protrusion 101 passes, a coupling protrusion 101 formed at the center of the plane of the sub yoke 100 and protruding upward, And a coupling hole 111 formed at the center of the case 110 and fitted to the coupling protrusion 101 of the sub yoke 100. Thus, (90) of the sub yoke (100) is passed through the through hole (91) of the spring (90) in a state where the spring (90) And the sub yoke 100 is engaged with the coupling hole 111 of the sub yoke 100 to couple the spring 90 and the sub yoke 100 to the case 110, 101 are formed on the circumferential surface thereof with a flange portion 102 for improving surface adhesion when the spring 90 and the case 110 are brought into contact with each other , And a plurality of protrusions protruding outward along the circumference are formed radially in a lower portion of the sub yoke (100).
delete

Images