KR100489830B1 - A brushless type vibration motor - Google Patents

Abstract

The present invention relates to a brushless vibration motor, comprising: a stator having a substrate on which a pattern circuit is printed on an upper surface of a bracket, and having a terminal portion for supplying external power to a plurality of winding coils mounted on the substrate; It has a yoke equipped with a magnet on the lower surface corresponding to the coil, a rotor having a weight on one side of the yoke, and a bearing member provided on a rotating shaft rotatably supporting the rotor with respect to the stator. In the case assembled to the bracket so as to form a space for accommodating the stator and the rotor, an integrated circuit for forming an opening of a predetermined size in the outer circumferential surface corresponding to the terminal portion and alternating the external power supplied to the winding coil The chip is such that the body portion is superimposed on the rotor and the remaining body portion is exposed to the outside of the case Through the bend it is mounted on the substrate.

According to the present invention, the effect of miniaturizing the motor and improving the motor performance is obtained by optimizing the position of the integrated circuit chip installed in the stator of the vibration motor.

Description

Brushless vibration motor {A BRUSHLESS TYPE VIBRATION MOTOR}

The present invention relates to a vibration motor, and more particularly, to a brushless type vibration motor capable of miniaturizing the motor and improving the motor performance by optimizing the position of the integrated circuit chip installed in the stator of the vibration motor.

In general, ringtones and vibrations are widely used for incoming calls in communication devices. For vibration, it is common to drive a small vibration motor so that the driving force is transmitted to the case of the device so that the device can vibrate.

Vibration motors currently applied to mobile phones are divided into flat type and cylinder type according to the shape of the motor, or brush type and brushless type depending on the presence or absence of a brush. Are distinguished. Among them, in the case of a flat type vibration motor, vibration can be generated with a relatively simple structure, such as by placing a weight in the motor and rotating it. In addition, since it is possible to manufacture a thin thickness and has various advantages such as the advantage of miniaturization of mobile phone components, the use range is gradually increasing.

1 is a cross-sectional view of a general brush type vibration motor, as shown, the brush type vibration motor 100 is largely a stator (stator assembly) 110, which is a fixed member and a rotor (rotor assembly) 120, which is a rotating member. )

That is, the stator 110 is connected to the input and output terminals and one end of the lower substrate 112 and the annular magnet 113 and the terminal unit to which external power is supplied, respectively, which are joined to the upper surface of the bracket 111. Brush 116 or the like.

The bracket 111 is covered by a case 119 having a lower opening, and the bracket 111 and the case 119 are formed at the center of the upper and lower ends of the upper and lower shaft holes 111a and 119a. It is connected to each other by the rotary shaft 114.

In addition, the rotation shaft 114 is provided with a rotor 120 to be rotatable, and the rotor 120 is insulated through the bearing 115 of the rotation shaft 114 assembling 125 and It consists of an upper substrate 121, a commutator 122, a weight body 123 and a winding coil 124 are integrally provided.

The upper substrate 121 is a circular printed circuit board, and the commutator 122 is buried so that the lower contact surface is exposed to the outside while a plurality of segments are formed at regular intervals at the peripheral edge of the rotation center side at the bottom of the upper substrate 121. The winding coil 124 may be provided as at least one coil positioned to correspond to each other within the same rotation radius on the vertical line of the magnet 113 of the stator 110 to have different polarities by the upper substrate 121. Power is supplied.

The weight body 123 is usually made of a material having a high specific gravity, such as tungsten, attached to a direction corresponding to the winding coil 124 provided on the upper substrate 121 to determine the amount of eccentricity of the motor. The insulator 125 allows the bearing 115, the winding coil 124, and the weight body 123 to be firmly coupled to each other on the upper substrate 121, and at the same time, for electrical insulation.

The stator 110 and the rotor 120 are electrically connected to each other by a pair of brushes 116 configured to have a lower end fixed to the lower substrate 112 and an upper end to be in sliding contact with the commutator 122.

The vibration motor 100 as described above is referred to as a brush-type vibration motor, the vibration motor 100 is a brush 116 as the rotor 120 rotates the segment between the segments of the commutator 122 and the gap between the segments. There is a problem that mechanical wear or electrical spark is generated over time. In addition, foreign matters generated by this may interfere with the stability of the electrical contact, thereby degrading the performance of the vibration motor 100 or causing noise. They also result in shortening the life of the vibration motor 100.

Therefore, in recent years, brushless (brushless) type vibration motors without a brush and commutator have been studied to compensate for the disadvantages of the brush type vibration motor as described above. In the case of the brushless vibration motor, an integrated circuit chip is used to drive the motor. Unlike the brush type vibration motor, the winding coil is disposed on the stator and the magnet is located on the rotor. .

2 is a cross-sectional view of a conventional brushless vibration motor, as shown, the brushless vibration motor 200 is composed of a stator 210 and a rotor 220 rotatably assembled thereto. The rotor 220 includes a yoke 221, a magnet 222 mounted on a lower surface thereof, and a weight body 223 installed at one end of the yoke 221. In the center, the upper end of the rotating shaft 224 is fixedly coupled to the yoke 221.

The stator 210 includes a bearing 215 supporting the rotation of the rotating shaft 224 while being in contact with the rotating shaft 224 of the rotor 220, and a case 219 having an open lower portion assembled from the upper portion. do. The lower end of the rotating shaft 224 is inserted into the shaft hole protruding in the center of the lower bracket 211, the substrate 212 is printed pattern circuit is located on the upper surface of the bracket (211).

A winding coil 213 is attached to the substrate 212 so as to face the magnet 222, and an integrated circuit chip 214 for supplying alternating current to the winding coil 213 is formed on the substrate 221. While being located at one side, the Hall sensor 216 for detecting the rotation position of the rotor 220 is also mounted.

The integrated circuit chip 214 disposed in the conventional brushless vibration motor 200 having the above-described configuration corresponds to an outer portion of the rotation radius of the rotor 220 as shown in FIGS. 3A and 3B. It is placed on the substrate 212 or as shown in Fig. 4 (a) (b), assembled on the substrate 212 corresponding to the inside of the rotation radius of the rotor 220.

However, when the integrated circuit chip 214 is positioned outside the rotation radius of the rotor 220, there is no need to change the design of the winding coil 213 provided in the stator 210, so that motor performance may be reduced. On the other hand, the mounting area of the substrate 212 on which the winding coil 213 is to be mounted must be relatively large, thereby increasing the overall size of the vibration motor, thereby making it difficult to optimize the design for miniaturizing the motor. there was.

 In addition, when the integrated circuit chip 214 is positioned inside the rotation radius of the rotor 220, the mounting area of the substrate 212 on which the winding coil 213 is mounted does not need to be relatively large. While miniaturization is possible, the number of installation of the winding coil 213 must be reduced in order to secure the installation space by the area where the integrated circuit chip 214 is located, thereby reducing the motor torque, thereby reducing the motor performance. There was a problem.

Therefore, the present invention has been proposed to solve the conventional problems as described above, the object of which is to maximize the size of the motor inside the brush to mount the integrated circuit chip without losing the winding coil while miniaturizing the size of the motor To provide a lease type vibration motor.

As a technical configuration for achieving the above object, the present invention,

A stator provided with a substrate on which a pattern circuit is printed on an upper surface of a bracket, and having a terminal portion for supplying external power to a plurality of winding coils mounted on the substrate;

A rotor having a yoke equipped with a magnet on a lower surface corresponding to the winding coil, and having a weight on one side of the yoke;

A bearing member provided on a rotating shaft rotatably supporting the rotor with respect to the stator,

In the case assembled to the bracket to form a space for accommodating the stator and the rotor, an integrated circuit chip having an opening of a predetermined size formed on an outer circumferential surface corresponding to the terminal part and alternating external power supplied to the winding coil. Silver is provided by a brushless type vibration motor, characterized in that the body portion is superimposed on the rotor and the remaining body portion is mounted on the substrate through the opening so as to be exposed to the outside of the case.

Preferably, the terminal portion is mounted on the protrusion of the substrate corresponding to the outer region of the case.

More preferably, the opening is cut into a generally same cross section as the integrated circuit chip.

More preferably, a gap is formed between the body outer surface of the integrated circuit chip and the opening so that heat sources and foreign substances generated in the inner space between the bracket and the case can be discharged to the outside.

More preferably, the integrated circuit chip is disposed between the terminal portion and the winding coil.

More preferably, the at least one winding coil corresponding to each other of the integrated circuit chip may have a size smaller than the outer diameter of the remaining winding coils not corresponding to the integrated circuit chip.

More preferably, the integrated circuit chip is disposed between the winding coil and another winding coil adjacent thereto.

Hereinafter, the present invention will be described in more detail.

5 is a cross-sectional view of the brushless vibration motor according to the present invention, Figure 6 (a) (b) is a plan view of the stator employed in the brushless vibration motor according to the present invention.

That is, the vibration motor (1) of the present invention is to position the integrated circuit chip in the effective space near the terminal portion protruding to the outside of the case for supplying power from the outside winding coil 13 (at least one provided in the stator ( The vibration motor 1 is composed of a stator 10, a rotor 20, and a bearing member 30, which can optimize the arrangement without loss of 13a).

That is, the stator 10 includes a bracket 11 formed of a circular plate plate, and a pattern circuit is printed on the upper surface of the bracket 11 so as to be electrically connected to the terminal portion 19 to which power is supplied from the outside. (12) is provided.

Polarity of the power supplied to the winding coil 13 and 13a together with at least one winding coil 13 and 13a electrically connected to the pattern circuit to generate an electromagnetic force when the power is applied to the substrate 12. The integrated circuit chip 14 which alternates is provided.

The lower end of the rotation shaft 31 having the lower shaft hole 17 protrudes to a predetermined height near the center of the bracket 11 and the lower shaft hole 17 is provided with a bearing member 30 in the middle thereof. This is assembled, the upper end of the rotary shaft 31 is assembled in the upper shaft hole 18 formed in the center of the case (16).

The case 16 is a cylindrical member having a lower surface open to be coupled to the outer circumference of the bracket 11 so as to form a space S together with the stator 10 to accommodate the rotor 20. .

Here, the upper and lower end portions of the bearing member 30 directly contact the bracket 11 and the case 16 between the upper and lower ends of the bearing member 30 and the upper and lower shaft holes 17 and 18. It is preferable to dispose the upper and lower washers 37 and 38 respectively to prevent them from being carried out and to support the bearing member 30 in the axial direction.

On the other hand, the rotor 20 is a rotating body rotatably assembled via the bearing member 30 of the rotating shaft 31 installed perpendicular to the stator 10, the rotor 20 is a yoke 21 ), A magnet 22 and a weight body 23.

The yoke 21 is composed of a metal plate on a hollow disc disk, the inner circumferential surface of the center hole formed in the center of the outer peripheral surface of the bearing member 30 is assembled, the lower surface of the yoke 21 is the winding coil ( 13) The magnet 22 is attached to a position corresponding to 13a, and the magnet 22 alternately has 2 n, i.e., 2, 4, 6 ... N, S poles in the circumferential direction. It is composed of a magnet member magnetized.

The number of poles of the magnet 22 is preferably about 2 to 6 so that the component configuration can be simplified in consideration of the increase in the number of internal parts according to the number of poles arranged.

The weight body 23 is an important member that determines the amount of eccentricity of the motor as a heavy weight material that is eccentrically bonded to one side of the outer circumferential surface of the yoke 21.

On the other hand, the lower end is assembled to the outer periphery of the bracket 11 so as to form a space S for accommodating the stator 10 and the rotor 20 to correspond to the terminal portion 19. The opening 15 of a predetermined size is formed on the outer circumferential surface thereof.

Here, the terminal portion 19 to which the external power is supplied is mounted on the protrusion 12a of the substrate 12 protruding to the outside of the case 16 to facilitate connection with the external power.

In addition, the integrated circuit chip 14 which alternates the external power supplied to the winding coils 13 and 13a has a body part overlapping the rotation radius of the rotor 20 and the other body part is the case 16. It is mounted on the substrate 12 through the opening 15 so as to be exposed to the outside.

In addition, the opening 15 is preferably formed to be cut in the same cross-sectional shape as the integrated circuit chip 14 having a rectangular cross section to facilitate mounting of the integrated circuit chip 14 disposed therein.

Between the body of the integrated circuit chip 14 and the opening 15, the heat source and foreign substances generated in the space (S) formed between the bracket 11 and the case 16 when the motor is driven easily to the outside easily Form a certain size interval so that you can.

The integrated circuit chip 14 is disposed between the terminal unit 19 mounted on the protrusion 12a of the substrate 12 corresponding to the outer region of the case 16 and the winding coil 13, so that the terminal unit 19 Periodically alternating polarity of the power supplied to the winding coil 13 from.

The integrated circuit chip 14 mounted on the protruding portion 12a on which the terminal portion 19 is mounted, and at least one winding coil 13a corresponding to each other, is integrated as shown in FIG. It is provided with a size smaller than the outer diameter of the remaining winding coil 13 that does not correspond to the circuit chip 14.

In addition, the integrated circuit chip 14 may be disposed between the winding coil 13 and another winding coil 13 adjacent thereto, as shown in FIG.

According to the present invention as described above, the integrated circuit chip is mounted so as to cover the body in the inner and outer regions of the case in the protrusion of the substrate on which the terminal portion to which the external power is supplied is integrated without loss of winding coil on the stator substrate. Since the circuit chip can be installed and the installation position and size thereof can be optimized, the efficiency of the circuit configuration of the vibration motor can be improved and the miniaturized design of the vibration motor becomes possible.

In addition, it is possible to optimize the position and size of the winding coil to increase the rotational torque of the motor, reduce the current consumption, reduce the starting voltage, and increase the number of revolutions of the rotor to significantly improve motor performance. The effect can be obtained.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

1 is a cross-sectional view of a general brush type vibration motor.

2 is a cross-sectional view of a conventional brushless type vibration motor.

3 (a) and 3 (b) are a plan view and a cross-sectional view in which an integrated circuit chip is mounted in addition to a rotation radius of a rotor provided in a conventional brush type vibration motor.

Figure 4 (a) (b) is a plan view in which the integrated circuit chip is mounted in the rotation radius of the rotor provided in the conventional brush type vibration motor.

5 is a cross-sectional view of a brushless type vibration motor according to the present invention.

Figure 6 (a) (b) is a plan view of the stator employed in the brushless vibration motor according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ...... Stator 11 ...... Bracket

12 ... substrate 12a ..... projection

13,13a .... Winding coil 14 ...... Integrated circuit chip

15 ...... opening 16 ...... case

20 ...... rotor 21 ...... yoke

22 ...... Magnet 23 ...... Weight

30 ...... Bearing member 31 ...... Rotary shaft

Claims (7)

A stator provided with a substrate on which a pattern circuit is printed on an upper surface of a bracket, and having a terminal portion for supplying external power to a plurality of winding coils mounted on the substrate; A rotor having a yoke equipped with a magnet on a lower surface corresponding to the winding coil, and having a weight on one side of the yoke; A bearing member provided on a rotating shaft rotatably supporting the rotor with respect to the stator, In the case assembled to the bracket to form a space for accommodating the stator and the rotor, an integrated circuit chip having an opening of a predetermined size formed on an outer circumferential surface corresponding to the terminal part and alternating external power supplied to the winding coil. The brushless vibration motor, characterized in that the body portion is superimposed on the rotor and the remaining body portion is mounted on the substrate through the opening so as to be exposed to the outside of the case. The method of claim 1, And the terminal portion is mounted on a protruding portion of a substrate corresponding to an outer region of the case. The method of claim 1, The opening is brushless type vibration motor, characterized in that the incision is formed in the same cross-section and the integrated circuit chip. The method of claim 1, And a gap formed between the body outer surface of the integrated circuit chip and the opening so that a heat source and foreign substances generated in the inner space between the bracket and the case can be discharged to the outside. The method of claim 1, And the integrated circuit chip is disposed between the terminal portion and the winding coil. The method of claim 1,  And at least one winding coil corresponding to each other of the integrated circuit chip is smaller than an outer diameter of the remaining winding coils not corresponding to the integrated circuit chip. The method of claim 1, The integrated circuit chip is a brushless vibration motor, characterized in that disposed between the winding coil and another winding coil adjacent thereto.