KR20110049385A - Noise reduction structure of linear vibrator - Google Patents

Noise reduction structure of linear vibrator Download PDF

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Publication number
KR20110049385A
KR20110049385A KR1020090106379A KR20090106379A KR20110049385A KR 20110049385 A KR20110049385 A KR 20110049385A KR 1020090106379 A KR1020090106379 A KR 1020090106379A KR 20090106379 A KR20090106379 A KR 20090106379A KR 20110049385 A KR20110049385 A KR 20110049385A
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KR
South Korea
Prior art keywords
spring
buffer
case
noise
moving part
Prior art date
Application number
KR1020090106379A
Other languages
Korean (ko)
Inventor
이인호
Original Assignee
이인호
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Filing date
Publication date
Application filed by 이인호 filed Critical 이인호
Priority to KR1020090106379A priority Critical patent/KR20110049385A/en
Publication of KR20110049385A publication Critical patent/KR20110049385A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H02K33/10—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

PURPOSE: An apparatus for reducing noised generated in a linear vibrator is provided to suppress the generation of vibrations and resonances by arranging a impact absorbing material to the operational part of an elastic unit or a spring. CONSTITUTION: A pre-set space is arranged in a case(120). Permanent magnet(150) and a coil are arranged in the case. A moving part(130) includes a mass body(131). The mass body moves based on the electro-magnetic force between permanent magnetic and coil. A circuit board(180) receives power from the outside of the case. A spring structure(132) is arranged between the moving part and the case.

Description

  Noise reduction structure of linear vibrator

  The present invention relates to a device for generating a vibration function in a mobile communication terminal or a game machine, etc., in order to supply a stable and uniform power, non-wear power supply is not a power supply method by the sliding contact that wear occurs by mechanical friction. A linear vibrator with a scheme In particular, the moving part is not supported by the support shaft and is maintained at a certain distance from the inside of the case, and the gap causes noise while hitting the case surface while the moving part reciprocates. And as the moving part moves at a higher frequency, the noise increases, and the spring itself generates noise due to vibration. In particular, when operating in the audible frequency range noise and noise that people do not hear. The present invention is directed to a method for reducing such noise most effectively.

Basically, a vibration generating device is installed in a mobile phone or a game machine, and a product with small vibration, large vibration and long life is required.

1 is a cross-sectional view of a rotary vibration motor, which is a conventional vibration generating device, and a conventional method of supplying external power to the coil 14 formed in the moving part is as follows.

 First, power is supplied to the vibrator through the lead wire 15 fixed to the case bracket 16. The lead wire 15 is electrically connected to the FPCB 11 by soldering or the like, and the FPCB 11 has a pattern formed as shown in FIG. 3 so that electricity can be connected thereto. A part of the FPCB 11 is electrically connected to the brush type power connector 12. On the other hand, a coil 14 is located in the moving part, and the coil 14 is electrically connected to the circuit board 13. In addition, the circuit board is formed with a commutator pattern such that the brush-type power connection 12 is in electrical sliding contact.

In the conventional technology configured as described above, when external power is supplied to the vibrator through the lead wire 15, it is transmitted to the circuit board 13 disposed on the moving part through the FPCB 11 and the brush type power connection 12. Then, the power delivered to the circuit board of the moving part is delivered to the coil 14 electrically connected to the circuit board.

When power is applied from the outside, vibration is generated while the moving part and the circuit board are rotated by the electromagnetic force, and the brush and the circuit board are electrically connected during the frictional motion.

2 is an example of an FPCB 11 designed to connect a power source to a brush.

3 shows an example of the circuit board 13 of the rotor, and it can be seen that the commutator is divided into several pieces so that the rotor can properly supply the transfer month to the coil while properly commutating during rotation. In the related art, the moving part is supported and rotated about the shaft, thereby reducing noise with high precision of the bearing and the shaft, and lubricating and reducing the noise by oil from the bearing between the shaft and the bearing. However, such a structure can reduce noise when using a shaft, but it is very difficult to reduce noise in a structure without a shaft. The reason is that the moving object is in an unstable state because there is no support shaft such as a shaft, and a large noise is generated while moving and hitting the upper and lower sides. In addition, the faster the operating frequency of the reciprocating motion of the moving part, the higher the noise, and the components of the product also vibrate to increase the noise.

  In the conventional rotary vibration motor, as described above, the power supply method supplies power to the coil through the sliding contact between the brush type power connection portion and the circuit board. However, since the power is supplied through the sliding friction, the brush-type power connector may be worn, and a fatal defect such as abrasion or abrasion of the contact may be caused by abrasion during a long life test. In addition, noise is generated due to friction between the brush and the circuit board. In particular, as the rotor rotates at a high speed, the noise increases. Accordingly, the present invention solves the problem by utilizing the elastic spring as a power conduction device to solve the prior art as described above. And the movement part has a certain clearance with the case, and this clearance allows the movement part to reciprocate freely in the case. However, as the speed of the moving part increases, the movement part not only slides friction but also irregularly hits the friction surface and the noise increases.

In particular, when an elastic body or a spring is used, noise and noise may increase due to vibration or resonance of the component itself.

  The present invention uses the following means to solve the disadvantages of the conventional vibrator.

Springs and weights were composed of power connection passages so that each part from the circuit board supplying power from the outside to the coil of the final moving part was electrically connected without being worn, so that a uniform and stable power supply was always made. And in order to make the structure having mechanical stability while the spring is electrically connected to the adjacent parts, it is possible to connect by placing a projection in a conventional spring structure. In particular, the moving part is not supported by the support shaft and is maintained at a certain distance from the inside of the case, and because of this interval, the moving part reciprocates and generates noise while hitting the case surface irregularly. In order to reduce the noise, the elastic member is placed and the elastic member is used to elastically contact the friction surface formed on the case surface so that the frictional resistance is reduced and the reciprocating motion is smoothly applied. It is designed to realize high quality linear vibration by reducing the noise generated by the moving part of the case, and to improve the noise by using the elastic principle of the spring or air pressure properly when using the elastic member. In particular, when an elastic body or a spring is used, the elastic body or the spring itself vibrates or resonates when the moving part moves in a high frequency region, thereby generating noise. The present invention is designed to suppress unnecessary vibrations or resonances generated in the elastic body or the spring itself by contacting the moving part of the elastic body or the spring using a shock absorber to suppress noise while the elastic body or the spring operates normally.

The present invention is a method of supplying power to the coil of the final moving portion in the circuit board is supplied from the outside as described above, rather than using the conventional sliding friction that mechanical wear occurs, each component is not worn It is configured to be connected to the power supply to the final coil, so that it can be used for a long time without deterioration of life and performance due to wear. The present invention is designed to realize high quality linear vibration by reducing the noise generated when the moving part hits the case by using the elastic member . In particular, it is designed to suppress the unnecessary vibration or resonance generated in the elastic body or the spring itself by contacting the operating portion of the elastic body or the spring by using a shock absorber to suppress the noise while the elastic body or the spring operates normally. Therefore, as the operating frequency of the moving part increases, the noise becomes louder and a problem that may appear as a noise problem as it enters the audible frequency band is solved by using a buffer, so that a low-noise and responsive linear vibrator can be realized.

  With reference to the accompanying drawings, a linear vibrator according to the present invention for achieving the above object will be described in detail.

4 and 5 show an embodiment of a linear vibrator according to the invention.

The linear vibrator according to the present invention is composed of a case 120 having a predetermined space therein, the permanent magnet 150 is fixed to have a predetermined space in the center of the case 120, facing each other .

In addition, the case and the permanent magnet 150 and the movement unit is disposed so as not to interfere with each other, the movement unit first between the permanent magnet 150 and the permanent magnet disposed facing each other so as to act the electromagnetic force ( 140 is disposed, a mass body 131 to be moved by the electromagnetic force of the permanent magnet 150 and the coil 140 is disposed. The case 120 includes a circuit board 180 to which power is supplied from the outside, and at least one spring 132 is disposed between the case and the moving part.

  In the linear vibrator having such a configuration, an electrical input signal from the outside enters through the circuit board 180, passes through the spring 132 and the mass body 131, and is applied to the coil 140 and the opposite mass body ( 131 and the spring 132 are connected to the circuit board 180 to generate an electromagnetic force, and the movement unit 130 and the coil 140 move. In addition, by using the buffer characteristics of the spring 132, regardless of the spatial movement of the coil 140, the electrical connection is always obtained.

In particular, the present invention is a projection is formed on a portion of the mass body 131 in the movement unit 130 and the projection is to reciprocate the sliding action with the case 120 without the friction member 200. However, in order for the movement unit 130 to reciprocate freely, the movement unit 130 is sandwiched between the upper and left or right spaces of the case 120 with a certain distance from the case 120 contacting the mass body 131 up and down. It should be configured so that it is not inevitable. However, due to this interval, the movement unit 130 not only slides in the direction of the central axis of the spring 132 during the reciprocating motion, but also moves in the direction perpendicular to the central axis of the spring 132. While moving in a direction perpendicular to the central axis of the spring 132, a portion of the mass body 131 fixed to the moving part 130 hits the case 120 up and down or side surfaces. This causes noise. The present invention has a friction member 200 between the movement unit 130 and the case 120, but the friction member 200 is the impact of the movement unit 130 hits the case 120 directly while the movement unit 130 smoothly reciprocating It is designed to reduce the noise by eliminating the noise due to the contact between the metal and to reduce the impact by the elastic force possessed by the friction member 200 even if the impact on the friction member 200 by avoiding. For example, the friction member 200 is formed of a resin-based thin tape and an adhesive, the moving part 130 and the contact portion is made of a resin system material, the case 120 and the friction member 200 contact portion is an adhesive component Easily fixed to the case 120 is made of a material having a strong wear resistance while the friction member 200 can obtain a double effect of reducing the noise by relieving the impact of the moving part. In addition, when the exercise unit 130 is operated at a high operating frequency, unlike the case of operating at a low frequency, the noise increases toward the audible frequency band. In addition, when the movement unit 130 moves at a high frequency, noise may be generated by surging, vibration and resonance phenomena in the spring 132 itself as well as noise hitting the friction member 200 facing the movement unit 130. Let's do it.

This can be designed by shifting the resonant frequency band, but it is not so easy. The present invention is designed to operate by contacting the buffer 290 to the spring 132 to reduce the noise generated by the spring 132 itself. As a method of operating in contact with the spring 132, there is a method of placing a buffer 290 in a portion of the inner side of the spring 132 and a method of attaching the buffer 290 to one side of the spring 132. The buffer 290 installed to contact the spring 132 is designed to reduce noise by effectively reducing the vibration of the spring 132 itself. In particular, the product having a very soft elasticity, such as a sponge that we usually use as a buffer 290 is also effective, using a buffer 290 having a constant value of 1/2 or less than the spring constant of the spring 132 is good. . In comparison with the spring constant of the spring 132 and the spring constant of the buffer 290, the relatively smaller the spring constant of the buffer 290, the easier the product design, but conversely, the noise damping effect can be reduced. In addition, by applying oil or grease to the buffer 290, it may have a lubricating oil preservation function, so that oil or grease is contained in the buffer 290, and whenever the spring 132 is operated, the friction is directly or through the spring 132. By supplying little by little to the member 200, the effect of supplying lubricating oil between the friction member 200 and the movement part 130 occurs, and it can operate for a long time and is advantageous for long life. In addition, oil or grease is supplied to the spring 132 to prevent rust.

FIG. 5 is an embodiment of a buffer 290 applied to FIG. 4.

The buffer 290 is designed to have a circumferential shape to be installed inside the coil spring 132 and to be in contact with the inside of the spring 132. Therefore, when the spring 132 vibrates itself, the buffer 290 may absorb the vibration of the spring 132 to reduce the noise. And even if not in direct contact with the spring 132 by installing in contact with the movement unit 130 it is possible to obtain the effect of suppressing the noise generated in the movement unit 130.

6 is another embodiment of a buffer 29.

By attaching the buffer 290 to a portion of the spring 132, it is possible to obtain an effect of suppressing the noise generated by the vibration or resonance of the spring itself.

7 is another embodiment of a buffer 29.

The embodiment is when the spring 132 is composed of thin plates and has a circular shape. By placing the buffer 290 in the inner portion of the spring 132, it is possible to obtain the effect of suppressing the noise generated by the vibration or resonance of the spring itself. In addition, by attaching the buffer 290 to a portion of the spring 132, it is possible to obtain the effect of suppressing the noise generated by the vibration or resonance of the spring itself.

8 is another embodiment of a buffer 29.

It is an embodiment when the spring 132 is composed of thin plates and has a rectangular shape. By placing the buffer 290 in the inner portion of the spring 132, it is possible to obtain the effect of suppressing the noise generated by the vibration or resonance of the spring itself. In addition, by attaching the buffer 290 to a portion of the spring 132, it is possible to obtain the effect of suppressing the noise generated by the vibration or resonance of the spring itself.

In addition, by applying oil or grease to the buffer 290, it may have a lubricating oil preservation function. Oil or grease is contained in the buffer 290, and the lubricant is continuously supplied between the friction member 200 and the moving part 130. It is advantageous for long life operation. In addition, oil or grease is supplied to the spring 132 to prevent rust.

1 is a cross-sectional view of a conventional rotary vibration motor.

Figure 2 is an embodiment of the lead wire connection portion of a conventional rotary vibration motor

3 is an embodiment of a rotor structure of a conventional rotary vibration motor.

4 is a structure of Embodiment 1 of the present invention

5 is a detailed structure of the buffer of Example 1 of the present invention

Figure 6 is another embodiment of the buffer of Example 1 of the present invention

7 is an embodiment of another buffer structure according to the present invention.

8 is an embodiment of another buffer structure according to the present invention.

(Explanation of symbols for the main parts of the drawing)

11: conventional FPCB

12: brush type power connection

13: conventional circuit board

14: conventional coil

15: lead wire

16: conventional case bracket

120: case

130: movement unit 131: mass

132: spring 140: coil

150: magnet (permanent magnet) 160: flat weight

180: circuit board 190: coil connection

200: friction member 210: damper

290: buffer

Claims (7)

A case having a predetermined space therein, Permanent magnets and coils having a predetermined space inside the case, An electromagnetic force acting between the permanent magnet and the coil, the movement part including a mass body moving by the force, A circuit board connected to supply power from the outside of the case, At least one spring structure disposed between the movement portion and the case In linear vibrator with A linear vibrator configured to suppress a vibration and noise of the spring itself by placing a buffer on a portion of the spring    The method of claim 1, A structure for placing a buffer 290 to be in contact with the spring 132 in the inner portion of the spring 132    The method of claim 1, A structure for attaching the buffer 290 to a portion of the spring 132   The method of claim 1, A structure for placing a buffer 290 to contact a portion of the movement unit 130    The method of claim 1,  Structure composed of a resin having pores of 0.01 mm or more as the buffer 290     The method of claim 1,  Structure using a sponge as the buffer 290    The method of claim 1, Oil or grease structure into the buffer 290
KR1020090106379A 2009-11-05 2009-11-05 Noise reduction structure of linear vibrator KR20110049385A (en)

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Application Number Priority Date Filing Date Title
KR1020090106379A KR20110049385A (en) 2009-11-05 2009-11-05 Noise reduction structure of linear vibrator

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Application Number Priority Date Filing Date Title
KR1020090106379A KR20110049385A (en) 2009-11-05 2009-11-05 Noise reduction structure of linear vibrator

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101217093B1 (en) * 2010-05-12 2013-01-11 (주)파트론 Linear vibrator having vibration absorption part
WO2017133132A1 (en) * 2016-02-05 2017-08-10 歌尔声学股份有限公司 Linear vibration motor
CN110434655A (en) * 2019-08-08 2019-11-12 冯运忠 A kind of firm numerically-controlled machine tool motor cabinet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101217093B1 (en) * 2010-05-12 2013-01-11 (주)파트론 Linear vibrator having vibration absorption part
WO2017133132A1 (en) * 2016-02-05 2017-08-10 歌尔声学股份有限公司 Linear vibration motor
US11133735B2 (en) 2016-02-05 2021-09-28 Goertek Inc. Linear vibration motor
CN110434655A (en) * 2019-08-08 2019-11-12 冯运忠 A kind of firm numerically-controlled machine tool motor cabinet

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