KR100526252B1 - A flat type vibration motor - Google Patents

Abstract

The present invention relates to a flat vibration motor, comprising: a shaft supported between a case and a bracket assembled below; At least two winding coils on the upper surface of the upper base portion disposed in the case and a weight body eccentrically disposed in the vicinity thereof, the commutator having one end of the winding coil electrically connected and the other end of the winding coil electrically A rotor having a slip ring connected to a neutral point through which current flows; And a stator having a magnet corresponding to the winding coil on an upper surface of a lower base, electrically connected to a power supply unit provided in the lower base, and having a pair of brushes contacting the commutator and the slip ring, respectively. It is configured by.

According to the present invention, it is possible to replace the single winding instead of a single winding, while maintaining the motor drive stable by preventing the motor starting phenomenon, and to simplify the assembly process to reduce labor and material costs, simplify the assembly structure, manufacturing cost Can reduce the cost.

Description

Flat Vibration Motors {A FLAT TYPE VIBRATION MOTOR}

The present invention relates to a flat vibration motor, and more particularly, to replace the single winding in place of the double winding, while preventing the motor start-up phenomenon to keep the motor stable and to simplify the assembly process to reduce labor and material costs It can, and relates to a flat vibration motor that can reduce the manufacturing cost by simplifying the assembly structure.

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 whole device can vibrate.

Currently, vibration motors applied to communication devices such as mobile phones are classified into flat type (or coin type) and cylindrical type (cylinder type or bar type) according to the shape of the motor.

Among them, in the case of flat vibration motors, vibration can be generated with a relatively simple structure such as placing a high specific gravity weight inside the motor and rotating it, and it is possible to manufacture a thin thickness, which is advantageous for miniaturization of mobile phone parts. Since there are many advantages such as dots, the range of use thereof is gradually increasing.

1 is an exploded perspective view of a general flat vibration motor, Figure 2 is a longitudinal sectional view of a general flat vibration motor, a conventional flat vibration motor 1, as shown, a rotor assembly (rotor assembly) largely rotating member (Hereinafter, referred to as a rotor) 10, and a stator assembly (hereinafter, referred to as stator) 20, which is a fixing member, and a case 30 in which they are accommodated.

That is, the rotor 10 is an eccentric rotation structure that is rotatably assembled in the case 30, the winding coil 12 wound on the upper surface of the upper substrate 11, the pattern circuit is not formed a plurality of coils 12 And a weight body 13 is eccentrically disposed in the vicinity of the winding coils 12 and 14, and the winding coils 12 and 14 and the weight body 13 are insert-molded insulators. The inside of 16 is molded so as to be protected from the external environment.

In addition, the lower surface of the upper substrate 11, on which the pattern circuit is formed, is composed of a plurality of segments 15a, 15b, 15c, and 15d with a predetermined interval in the circumferential direction, and the contact surface is exposed downward. The commutator 15 is provided, and some segments of the commutator 15 are in elastic contact with the upper end of the anode and cathode brushes 25a and 25b of the brush 25 provided in the stator 20.

On the other hand, the stator 20 is a fixing structure provided on the bracket 35 that is assembled to block the lower portion of the case 30 is opened downward, the lower substrate 21 provided on the upper surface of the bracket (35) In the circumferential direction is provided with a ring-shaped magnet 22 magnetized alternately in the N, S poles, the power supply for electrically connecting between the external power supply lead (24a) 24b and the brush (25) ( 23 is composed of positive and negative terminals 23a and 23b provided on one side of an upper surface of the lower substrate 21.

In addition, the brush 25 is divided into positive and negative brushes 25a and 25b, and these are the positive terminal of the power supply unit 23 so that the positive polarity (+) and the negative polarity (-) are respectively supplied. 23a and the negative electrode terminal 23b are electrically connected, respectively.

On the other hand, the rotor 10 is fitted to the shaft 31 provided perpendicular to the center of the upper surface of the bracket 35, via the bearing member 32 integrally provided on the rotor 10 And rotatably assembled, and the upper and lower ends of the shaft 31 are supported by the upper surface of the bracket 35 and the lower surface of the case 10.

The drive of the vibration motor 1 having such a configuration is supplied to the commutator 15, the power input through the power supply unit 23 of the stator 20 via the brush 25, the commutator 15 The power is alternately transferred to the winding coils 12 and 14 by selective contact between the brush divided for the anode and the cathode and the commutator 15 divided into a plurality of parts.

By the interaction between the winding coils 12 and 14 and the magnet 22, the rotor 10 is driven to rotate in one direction about the shaft 31. At this time, the rotor 10 generates lateral pressure while being eccentrically rotated with respect to the shaft 31, and the side pressure is a vibration force on the case 30 and the bracket 35 supporting the upper and lower ends of the shaft 31. It is delivered to and the incoming call detection becomes possible.

In order to drive the motor as described above, the winding coil 12 is formed by contact between the brushes 25a and 25b of the brush 25 and the segments 15a, 15b, 15c and 15d of the commutator 15. In the conventional method of supplying power to the side 14), as shown in FIG. 3 (a), the electric angle θ is set according to the number of the segments 15a, 15b, 15c, and 15d. The segments 15a and 15c connected to one end and the other end of the coil wound on the winding coil 12 accordingly, and the segment 15b to which one end and the other end of the coil wound on the other winding coil 14 are connected. The cathode and anode brush members 25a and 25b must always correspond to each other exactly with respect to 15d.

However, when starting and driving the vibration motor having the above-described configuration, as shown in FIG. 3 (b), the brush 25b of any one of the anode and cathode brushes 25a and 25b is previously set. When the contact with the other segments 15b and 15d adjacent to each other, such as a brush shown by a dotted line, does not contact the predetermined segment 15c apart from the angle θ, the winding coils 12 and 14 are energized. Since the electric circuit is disconnected, a dead point, which is a non-conduction section at which the power supply is temporarily cut off, is generated, suspend or completely stop the starting and driving of the motor, and thus the motor function is lost. A fatal problem occurred.

This fire phenomena is such that the segments 15a, 15b, 15c, and 15d corresponding to the brushes 25a and 25b are always correctly contacted at 90 ° or 180 °, which is a constant electric angle θ. It is caused by poor assembly or design error that fails to assemble the commutator 15 and the brush 25 in the rotor 10 and the stator 20, or between the segments 15a, 15b, 15c and 15d. The brush 25 is deformed by the impact force generated while passing through the gap, so that the contact point with the commutator 15 may be changed.

Accordingly, in order to prevent the motor starting phenomenon due to the above starting point as described above, as shown in FIG. 4, the coils constituting the winding coils 12 and 14 are divided into two coils 12a. Double winding with (12b) (14a) and (14b), and the connection is made to have a neutral point (N) at a point where the coils (12a) (12b) and another coil (14a) (14b) connected in series are connected in common. By doing so, even if the cathode and anode brushes 25a and 25b deviate from the set electrical angle θ, no electrical starting point is formed and an electrical circuit capable of conducting electricity can be achieved.

However, the conventional method of forming the neutral point (N) by winding the coils (12) and (14) with double coils, respectively, in order to prevent the occurrence of a starting point, the coil is doubled using a winding machine (not shown). After winding by winding, the operator arranges each coil 12a, 12b, 14a, 14b, which is wound twice in the winding coil 12, 14, for the connection to form the neutral point N. Because it must be accompanied, coil winding and arrangement work is very cumbersome, which lowers the productivity of the work, and increases the amount of coil used, thereby increasing the manufacturing cost.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, the object of which is to simplify the assembly process by preventing the phenomenon of the starting point is generated while disconnecting the winding coil provided in the rotor, motor drive To provide a flat vibration motor that can maintain a stable.

It is another object of the present invention to simplify the assembly structure of the rotor and the stator, and to provide a flat vibration motor that can reduce the manufacturing cost of the motor by reducing the number of parts provided in the stator.

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

A shaft supported between the case and the bracket assembled under the case;

At least two winding coils and a weight body in the vicinity thereof are provided on an upper surface of the upper base portion disposed in the case, and a commutator having one end of the winding coil electrically connected to the other end of the winding coil is electrically connected to a current. A rotor having a slip ring on the lower surface of the upper base to form a neutral point through which the electricity is energized; And

A stator having a magnet corresponding to the winding coil on an upper surface of a lower base part, a stator having a pair of brushes electrically connected to a power supply unit provided in the lower base part, and contacting the commutator and the slip ring, respectively; By providing a flat vibration motor characterized in that.

Preferably, the winding coil is composed of a single coil in which one coil is wound.

Preferably, the upper base portion is a printed circuit board on which a pattern circuit is formed which electrically connects the slip ring and the winding coil to form a neutral point.

Preferably, the slip ring is composed of a ring-shaped ring member having an outer diameter smaller than the inner diameter of the commutator so as not to overlap with the commutator.

Preferably, the slip ring is composed of a ring-shaped ring member having an outer diameter larger than that of the commutator so as not to overlap with the commutator.

More preferably, the slip ring is a ring-shaped conductive metal member attached to the lower surface of the upper base portion to form a concentric shaft with the shaft.

More preferably, the slip ring is a ring-shaped conductive pattern member printed on the lower surface of the upper base portion to form a concentric axis with the shaft.

Preferably, the brush has a different forming length and is divided into a positive electrode brush and a negative electrode brush electrically connected to the positive and negative terminals of the power supply unit, respectively.

More preferably, the lower surface of the slip ring in which any one of the anode and cathode brushes and the lower surface correspond to each other is continuous in the circumferential direction and is formed as a smooth surface having a uniform surface roughness.

More preferably, the slip ring in contact with any one of the anode and the cathode brush forms at least one electrical contact.

Preferably, the brush is formed to be inclined at an angle higher than the top of the top surface of the magnet so as to be in elastic contact with the commutator and the slip ring.

Preferably, the lower base portion is provided as a printed circuit board having a circuit pattern for electrically connecting the power supply portion and the brush.

Preferably, the commutator is composed of a plurality of segments divided equally to the number of magnetic poles of the magnet.

Preferably, the spacing between the centers of the respective winding coils is configured such that the spacing between the centers of the magnetic poles magnetized to the magnets coincide with each other.

Preferably, the upper surface of the upper base portion further includes an insulator in which the winding coil and the weight body are integrally molded therein.

Preferably, the magnet is a ring-shaped magnet member in which N and S poles are alternately magnetized in the circumferential direction.

In addition, the present invention

A shaft supported between the case and the bracket assembled under the case;

At least two winding coils on the upper surface of the upper base portion disposed in the case and a weight body in the vicinity thereof, and a commutator having one end of the winding coil electrically connected to the lower surface of the upper base portion. Each other end of the rotor is electrically connected to form a neutral point through which current flows with the bearing member of the shaft; And

A magnet corresponding to the winding coil is provided on an upper surface of a lower base, and electrically connected to a power supply provided in the lower base, the brush being in contact with the commutator, and the power supply unit forming the neutral point. By providing a flat vibration motor comprising a; stator electrically connected to a feeder including a.

Preferably, the winding coil is composed of a single coil in which one coil is wound.

Preferably, the brush is a stand alone brush that is electrically connected to any one of the positive electrode and the negative electrode of the power supply unit to be in contact with the commutator to form a contact with the top.

Preferably, the brush is positioned above the top of the magnet and is inclined.

Preferably, the lower base portion is provided with a printed circuit board on which a circuit pattern is electrically connected between the power supply unit and the brush.

Preferably, the power supply unit is any one of a bracket and a shaft electrically connected to any one of the positive and negative terminals of the power supply unit to form an electrical circuit with the bearing member.

More preferably the bearing member, bracket and shaft are made of a conductor such as metal.

Preferably, the commutator is composed of a plurality of segments divided into the same number as the number of magnetic poles of the magnet.

Preferably, the spacing between the centers of the respective winding coils is configured such that the spacing between the centers of the magnetic poles magnetized to the magnets coincide with each other.

Preferably, the upper surface of the upper base portion further includes an insulator in which the winding coil and the weight body are integrally molded therein.

Preferably, the magnet is a ring-shaped magnet member in which N and S poles are alternately magnetized in the circumferential direction.

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

5 is an exploded perspective view showing a first embodiment of a flat vibration motor according to the present invention, Figure 6 is a longitudinal sectional view showing a first embodiment of the flat vibration motor according to the present invention, Figure 7 (a (b) and (c) are a plan view and a rear view and a plan view of the stator constituting the first embodiment of the flat vibration motor according to the present invention.

As shown in FIGS. 5 to 7, the flat vibration motor 100 of the present invention has a side pressure caused by the shaft 131 when the rotor 110 driven by the weight is eccentric with respect to the stator 120 when the power is applied. By generating vibrations, such a vibration motor 100 is composed of a rotor 110, a stator 120 and a case 130.

That is, the rotor 110 is a shaft that is supported at both ends of the upper and lower ends between the upper surface of the bracket 135 for blocking the inner space of the case 130 from the lower side and the lower surface of the case 130 ( It is a rotating structure assembled to eccentrically rotated via the bearing member 132 of the 131.

The rotor 110 is provided with at least two winding coils 112, 114 on the upper surface of the upper base 111 is disposed in the case 130, between the winding coils 112, 114 Or the weight body 113 made of a material having a high specific gravity, such as tungsten in the vicinity of the one-sided arrangement, the winding coil 112, 114 and the weight body 113 is a resin on the upper surface of the upper base 111 It is provided integrally inside the insulator 116 to be molded as an insulating material such as. Accordingly, the rotor 110 assembled to the shaft 131 via the bearing member 132 has an eccentric center of gravity and is eccentrically rotated during rotational driving.

And, the lower surface of the upper base 111 is provided with a commutator 115 and a slip ring 117, respectively, as shown in Figure 7 (a) (b) (c), the commutator 115 Each segment 115a, 115b is disposed in the circumferential direction with the same gap and electrically connected to each end 112a, 114a of at least two winding coils 112, 114 ( 115a and 115b are in contact with one of the pair of anode and cathode brushes 125a and 125b.

The other ends 112b and 114b of the winding coils 112 and 114 electrically connected to the commutator 115 at one end 112a and 114a are connected in series to form a connection portion, which is the slip ring 117. ) And a neutral point (N), which is a common connection point through which electrical current is connected, and is formed on the lower surface of the slip ring 117 connected to the middle island (N), for the anode and cathode brushes (125a, 125b). Contact with the other one of the) to supply a current having the opposite polarity to the current supplied to the commutator 115 side.

Accordingly, as shown in FIGS. 8 and 9, the negative electrode brush 125b is always on the lower surface of the slip ring 117 that forms the neutral point N between the winding coils 112 and 114. In the contacted state, the direction of current flowing from the anode to the cathode is such that segments 115a and 115b connected to respective ends 112a and 114a of the winding coils 112 and 114 are in contact with the lower surface of the commutator 115. The winding coil 112 is alternately replaced with a current flow in the A direction flowing to the winding coil 112 side and a current flow in the B direction flowing to the other winding coil 114 side whenever it passes through the anode brush 125a. An electromagnetic field can be formed at 114.

Here, the winding coils 112 and 114 are each composed of a single coil wound around one coil a plurality of times in one direction without the need of winding two coil members in a double manner as in the related art. Accordingly, the operation of connecting one end (112a) (114a) of each coil wound in the winding coil (112) 114 in a single wire winding method to the segments (115a) (115b) of the commutator 115, The other ends 112b and 114b of each coil of the winding coils 112 and 114 may be connected in series with each other, and then may be easily connected to the slip ring 117 to form a neutral point N. will be.

As described above, the positive electrode brush 125a connected to the positive electrode terminal 123a of the power supply unit 123 contacts the commutator 115, and the negative electrode brush 125b connected to the negative electrode terminal 123b is slip ring 117. ), A negative current always flows through the slip ring 117 connected to each of the other ends 112b and 114b of the winding coils 112 and 114 to form a neutral point (N).

Accordingly, the anode brush 125a contacting the lower surface of the commutator 115 at each end of the winding coils 112 and 114 in a state in which current of the cathode flows in the slip ring 117 is always present. When passing through contact with the segments 115a and 115b connected to 112a) and 114a, the windings 112 and the winding coils 114 may be periodically replaced to alternately supply current to the other winding coils 114 every time the contact is switched. It is possible to form an electromagnetic field in the coils 112 and 114.

Subsequently, the rotor 110 is eccentrically rotated in one direction about the shaft 131 by the interaction between the winding coils 112 and 114 and the magnets 122 of the stator 120 generating an electromagnetic field. When the eccentric rotation of the rotor 110, a vibration force is transmitted to the case 130 and the bracket 135 by the side pressure generated in the shaft 31 to allow the reception detection.

In addition, the upper base 111 having the winding coils 112 and 114, the weight body 113, and the insulator 116 is electrically connected between the slip ring 1117 and the winding coils 112 and 114. The pattern circuit forming the neutral point N commonly connected may be provided as a printed circuit board.

 The slip ring 117 provided on the lower portion of the upper base 111 is composed of a ring-shaped ring member having an outer diameter smaller than the inner diameter of the commutator 115 so as not to overlap with the commutator 115, or the commutator 115. It may be composed of a ring-shaped ring member having an outer diameter larger than the outer diameter of.

In addition, the slip ring 117 provided on the upper base 111 together with the commutator 115 may be attached to the lower surface of the upper base 111 so as to form a concentric shaft with the shaft 131. Or it is composed of a ring-shaped conductive pattern member that is pattern-printed on the lower surface of the upper base 111.

On the other hand, the stator 120 has a lower base 121 and a magnet 122 on the upper surface of the bracket 135, the magnet 122 is a bracket corresponding to each other with the winding coils 112, 114 N, S poles in the circumferential direction on the upper surface of the 135 is 2n ie 2, 4, 6 .... It is a permanent magnet magnetized alternately, the magnetic pole number of the magnet 122 is arranged In consideration of the increase in the number of parts in the interior according to the number of poles, it is preferable to use about 2 to 6 so as to simplify the component configuration.

In addition, one end of the lower base 121 is provided with a power supply unit 123 electrically connected to external power supply leads 124a and 124b to supply external power, and the power supply unit 123 is different from each other. The anode and cathode terminals 123a and 123b through which polarity current is supplied are divided into parts.

Meanwhile, as shown in FIG. 7C, the lower base 121 includes a pair of brushes 125 electrically connected to the power supply unit 123 and a lower end thereof. Each upper end has a different outer diameter and elastically contacts the commutator 115 and the slip ring 117 provided on the lower surface of the upper base 111.

Brush 125 for electrically connecting between the winding coils 112 and 114 of the rotor 110, which is a rotating member, and the power supply 123 of the stator 120, which is a fixed member, has a commutator having a different outer diameter ( 115 and the anode brush 125a and the cathode brush 125b having different forming lengths so that the bottom surface of the slip ring 117 is always in contact with each other, the anode and cathode brushes 125a ( 125b is electrically connected to the positive and negative terminals 123a and 123b of the power supply unit 123, respectively.

Here, the lower base 121 is electrically connected between the positive electrode and the negative electrode terminals 123a and 123b of the power supply unit 123 and the positive and negative electrode brushes 125a and 125b of the brush 125. The positive and negative pattern circuits 126a and 126b are provided as printed circuit boards which are pattern-printed on the upper surface.

In addition, the lower surface of the slip ring 117, which is in contact with any one of the anode and cathode brushes 125a and 125b and the lower surface thereof, is stable and circumferentially so as to reduce wear of the brush by reducing friction. It is preferable to form a continuous smooth surface with a uniform surface roughness.

Any one of the anode and cathode brushes 125a and 125b and the slip ring 117 must form at least one electrical contact so that power supply can be stably performed at all times.

In addition, the brush 125 is preferably formed at an upper end and inclined at a predetermined angle so as to be in elastic contact with the commutator 115 and the slip ring 117 at all times.

11 is an exploded perspective view showing a second embodiment of the flat vibration motor according to the present invention, Figure 12 is a longitudinal sectional view showing a second embodiment of the flat vibration motor according to the present invention, Figure 13 (a (b) and (c) are a plan view, a rear view, and a plan view of the stator constituting the second embodiment of the flat vibration motor according to the present invention.

11 to 13, the vibration motor 100a of the present invention has the same configuration as the above-described vibration motor composed of the rotor 110, the stator 120, and the case 130, and the same member. Are denoted by the same reference numerals and detailed description thereof will be omitted.

The vibration motor 100a is characterized in that the brush 125c is provided solely to simplify the assembly structure, and the neutral point N at which the other ends of the winding coils 112 and 114 are connected in series is made of a conductor. It is formed in the member 132, the bearing member 132 is electrically connected to any one terminal of the positive and negative terminals (123a, 123b) of the power supply 123.

That is, the winding coils 112 and 114 provided with at least two or more provided in the rotor 110 are wound around one coil a plurality of times in one direction without having to wind two coil members in a double manner as in the related art. It is composed of single coils.

And, as shown in Figure 13 (a) (b) (c) on the lower surface of the upper base 111 is provided with the winding coils 112, 114, a plurality of segments (115a, 115b) A commutator 115 is disposed in the circumferential direction with the same gap, and each segment 115a and 115b electrically connected to each end 112a and 114a of at least two winding coils 112 and 114. ) Is electrically connected to the other terminal of the positive and negative terminals of the power supply unit 123 that is not electrically connected to the bearing member 132 so that a current having the same polarity is always supplied.

The other ends 112b and 114b of the winding coils 112 and 114 electrically connected to the commutator 115 at one end 112a and 114a are connected in series, and the connection part thereof is connected to the bearing member 132. It is electrically connected to form a neutral point (N) which is a common connection point through which current is applied. Accordingly, the bearing member 132 is supplied with a current having a polarity opposite to that of the current supplied to the commutator 115 through the brush 125c.

Accordingly, as shown in FIGS. 14 and 15, the negative electrode terminal 123b of the power supply unit 123 in the bearing member 132 which forms the neutral point N between the winding coils 112 and 114. Is connected, the current flowing from the anode to the cathode is connected to each of the ends (112a) (114a) of the winding coils 112 (114) (115a, 115b) in contact with the lower surface of the commutator 115 The winding coil 112 is periodically replaced with a current flow in the A direction flowing toward the winding coil 112 and a current flow in the B direction flowing to the other winding coil 114 each time it passes through the brush 125c. 114) can form an electromagnetic field.

In addition, the stator 120 provided in the vibration motor 100a includes a magnet 122 in which N and S poles are alternately magnetized in the circumferential direction on the upper surface of the lower base 121 as described above, and a positive electrode and a negative electrode terminal. A power supply unit 123 consisting of 123a and 123b is provided.

As shown in FIG. 7C, the lower base 121 includes a brush 125c having an upper end elastically contacted with the lower surface of the commutator 115 to be electrically connected thereto. Is a single brush member electrically connected to any one terminal of the positive and negative terminals 123a and 123b of the power supply unit 123 so that the lower surface and the upper end of the commutator 115 are in contact with each other to form one contact point. to be.

The lower end of the brush 125c is pattern-printed on the upper surface of the lower base 121, and the pattern circuit 126a extends from any one of the positive and negative terminals 123a and 123b. It is electrically connected to the power supply 123. As a result, while maintaining the contact state with the brush 125c, the commutator 115 is always constantly alternately supplied with a predetermined polarity of the positive electrode and the negative electrode.

In addition, one of the positive and negative terminals 123a and 123b constituting the power supply unit 123 is not electrically connected to the brush 126c so that the winding coil 112 forms the neutral point N. Other ends 112b and 114b of the 114 are electrically connected to the feeder 140 including a bearing member 132 connected thereto.

Here, the power supply unit 140 is electrically connected to the other terminal of the positive and negative terminals 123a and 123b of the power supply unit 123 not connected to the brush 126c through a circuit pattern 126b. The case 130 is any one of a case 130, a shaft 131, and a bracket 135 made of a conductor such as metal so as to easily configure a series circuit capable of supplying current to the bearing member 132 side.

The lower base 121 is a circuit pattern (126a) (126b) for electrically connecting between the positive and negative terminals (123a) (123b) of the power supply unit (123), the brush (126c), and the power feeding unit (140). This printed circuit board is provided.

As described above, when the circuit pattern 126b extending from the negative electrode terminal 123b of the power supply unit 123 is connected to the case 130 and the bracket 135 which are fixed parts, they are vertically combined with each other, and between them. Both ends of the shaft 131 are supported, and the bearing member 132 is inserted in the middle of the length of the shaft 131, and the case 130, the shaft 131, the bearing member 132 and the bracket 135 are Since it is made of this conductor, the current of the cathode can flow through the neutral point (N) formed in the bearing member 132.

Accordingly, in the state where the negative current flows in the bearing member 132 to which the negative electrode terminal 123b is connected, the brush 125c contacting the lower surface of the commutator 115 is wound coils 112 and 114. Since the power supply can be periodically replaced to the winding coil 112 and the other winding coil 114 each time it passes in contact with the segments (115a, 115b) connected to each end (112a) (114a) of the The winding coils 112 and 114 may form an electromagnetic field.

Subsequently, the rotor 110 is eccentrically rotated in one direction about the shaft 131 by the interaction between the winding coils 112 and 114 and the magnets 122 of the stator 120 generating an electromagnetic field. When the eccentric rotation of the rotor 110, a vibration force is transmitted to the case 130 and the bracket 135 by the side pressure generated in the shaft 31 to allow the reception detection.

On the other hand, the vibration motor 100 (100a) of the present invention is driven in a single phase to form a time chart related to the magnetic flux density and time as shown in FIG. Accordingly, when the distance between the centers of the winding coils 112 and 114 and the centers of the magnetic poles formed in the magnet 122 do not coincide with each other, a force to drive in the reverse direction is generated. It will not be possible to keep the drive stable.

Accordingly, the commutator 115 is divided into a plurality of segments 115a and 115b equally divided by the same number 2n as the number of poles 2n of the magnet 122 so as to stably maintain the single-phase driving of the motor. The distance between the center points of the winding coils 112 and 114 is preferably configured to coincide with the distance between the centers of the NS magnetic poles alternately magnetized to the magnets 122.

According to the present invention as described above, each end of the winding coil provided with at least two rotors is connected to the commutator contacting the brush flowing through the anode current from the anode terminal, the other end of the winding coil connected in series with each other is a cathode It is connected to the slip ring or bearing member provided on the lower surface of the rotor so as to form a neutral point to which the cathode current is supplied from the terminal, so that the cathode brush is commutator in the state where the cathode current of constant polarity is always supplied to the other end of the winding coil. Whenever it comes in contact with the segment of the power supply, it is possible to supply power alternately to each winding coil connected to it. Therefore, it is possible to maintain the motor drive stably by preventing the non-energization caused by the starting point. To prevent the need for double winding of the winding coil, it reduces the assembly process of the motor, Simplify the lip structure to improve work productivity.

In addition, the effect of further simplifying the structure of the motor and reducing the number of components is 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 an exploded perspective view of a general flat vibration motor.

2 is a longitudinal sectional view of a general flat vibration motor.

3 shows a general flat vibration motor,

(a) is a rear view where the segments of the commutator and the anode and cathode brushes of the brush come into contact with each other,

(b) is a state diagram in which a segment of a commutator contacts the brush of an anode and a cathode of a brush.

4 is a double winding diagram of a winding coil for preventing a starting point in a general flat vibration motor.

5 is an exploded perspective view showing a first embodiment of a flat vibration motor according to the present invention.

6 is a longitudinal sectional view showing the first embodiment of the flat vibration motor according to the present invention.

7 shows a first embodiment of a flat vibration motor according to the present invention,

a) is the top view of the rotor,

b) is the rear view of the rotor,

c) is the top view of the stator.

8 is a state diagram in which the segment of the commutator and the anode and cathode brushes of the commutator contact with each other in the first embodiment of the flat vibration motor according to the present invention.

9 is a connection diagram of the winding coil in the first embodiment of the flat vibration motor according to the present invention.

10 is a graph between the magnetic field and time generated when driving the flat vibration motor according to the present invention.

11 is an exploded perspective view showing a second embodiment of the flat vibration motor according to the present invention.

12 is a longitudinal sectional view showing a second embodiment of a flat vibration motor according to the present invention.

Figure 13 constitutes a first embodiment of a flat vibration motor according to the present invention,

a) is the top view of the rotor,

b) is the rear view of the rotor,

c) is the top view of the stator.

14 is a state diagram in which the segment of the commutator and the anode and cathode brushes of the commutator contact with each other in the second embodiment of the flat vibration motor according to the present invention.

15 is a connection diagram of the winding coil in the second embodiment of the flat vibration motor according to the present invention.

Explanation of symbols on main parts of drawing

110: stator 111: upper base

112,114: winding coil 113: weight

115: commutator 115a, 115b: segment

117: slip ring 120: rotor

121: lower base 122: magnet

123: power supply 123a, 123b: positive and negative terminals

125,125c: Brush 125a, 125b: Anode, cathode brush

126a, 126b: pattern circuit 130: case

131: shaft 132: bearing member

135: bracket N: neutral point

Claims (27)

A shaft supported between the case and the bracket assembled under the case; At least two winding coils on the upper surface of the upper base portion disposed in the case and a weight body eccentrically disposed in the vicinity thereof, the commutator having one end of the winding coil electrically connected and the other end of the winding coil electrically A rotor having a slip ring connected to a neutral point through which current flows; And A stator having a magnet corresponding to the winding coil on an upper surface of a lower base part, a stator having a pair of brushes electrically connected to a power supply unit provided in the lower base part, and contacting the commutator and the slip ring, respectively; Flat vibration motor, characterized in that. The method of claim 1, The winding coil is a flat vibration motor, characterized in that consisting of a single coil coil is wound. The method of claim 1, The upper base portion is a flat vibration motor, characterized in that the printed circuit board is printed with a pattern circuit to form a neutral point by electrically connecting between the slip ring and the winding coil. The method of claim 1, The slip ring is a flat vibration motor, characterized in that consisting of a ring-shaped ring member having an outer diameter smaller than the inner diameter of the commutator so as not to overlap with the commutator. The method of claim 1, The slip ring is a flat vibration motor, characterized in that consisting of a ring-shaped ring member having an outer diameter larger than the outer diameter of the commutator so as not to overlap with the commutator. The method of claim 4 or 5, The slip ring is a flat vibration motor, characterized in that the ring-shaped conductive metal member attached to the lower surface of the upper base to form a concentric axis with the shaft. The method of claim 4 or 5, The slip ring is a flat vibration motor, characterized in that the ring-shaped conductive pattern member is printed on the lower surface of the upper base to form a concentric axis with the shaft. The method of claim 1, The brush has a different forming length, the flat vibration motor, characterized in that divided into a positive electrode and a negative electrode brush electrically connected to the positive and negative terminals of the power supply. The method of claim 8, A flat vibration motor, characterized in that the lower surface of the slip ring having a lower surface corresponding to any one of the positive electrode and the negative electrode brush is continuously formed in the circumferential direction and has a uniform surface roughness. The method of claim 8, The slip ring which is in contact with any one of the positive electrode, the negative electrode brush, characterized in that at least one electrical contact forms a flat vibration motor. The method of claim 1, The brush is a flat vibration motor, characterized in that the top is higher than the top surface of the magnet so as to be in elastic contact with the commutator and the slip ring is inclined at a predetermined angle. The method of claim 1, The lower base portion is a flat vibration motor, characterized in that the printed circuit board is provided with a circuit pattern for electrically connecting between the power supply and the brush. The method of claim 1, The commutator is a flat vibration motor, characterized in that composed of a plurality of segments divided equally to the number of magnetic poles of the magnet. The method of claim 1, The spacing between the centers of the winding coils are configured so that the spacing between the centers of the magnetic poles magnetized on the magnets coincide with each other. The method of claim 1, Flat upper vibration motor, characterized in that the upper surface of the upper portion further comprises an insulator in which the winding coil and the weight body is integrally molded therein. The method of claim 1, The magnet is a flat vibration motor, characterized in that the ring-shaped magnet member in which the N, S poles are alternately magnetized in the circumferential direction. A shaft supported between the case and the bracket assembled under the case; At least two winding coils on the upper surface of the upper base portion disposed in the case and a weight body eccentrically disposed in the vicinity thereof, and a commutator having one end of the winding coil electrically connected to the lower surface of the upper base portion. Each other end of the winding coil has a rotor electrically connected to form a neutral point through which current flows between the bearing member of the shaft; And A magnet corresponding to the winding coil is provided on an upper surface of a lower base, and electrically connected to a power supply provided in the lower base, the brush being in contact with the commutator, and the power supply unit forming the neutral point. And a stator electrically connected to a feeder including a flat vibration motor. The method of claim 17, The winding coil is a flat vibration motor, characterized in that consisting of a single coil coil is wound. The method of claim 17, The brush is a flat vibration motor, characterized in that the sole brush member which is electrically connected to any one of the positive and negative terminals of the power supply unit is in contact with the top to form a contact with the top. The method of claim 17, The brush is a flat vibration motor, characterized in that the top is higher than the upper surface of the magnet, inclined position. The method of claim 17, The lower base is a flat vibration motor, characterized in that the printed circuit board is printed with a circuit pattern for electrically connecting between the power supply and the brush. The method of claim 17, The feeder is a flat vibration motor, characterized in that any one of a bracket, a shaft electrically connected to any one of the positive and negative terminals of the power supply unit constituting an electrical circuit with the bearing member. The method of claim 22, The bearing member, the bracket and the shaft is a flat vibration motor, characterized in that composed of a conductor such as metal. The method of claim 17, The commutator is a flat vibration motor, characterized in that composed of a plurality of segments divided into the same number as the number of magnetic poles of the magnet. The method of claim 17, The spacing between the centers of the winding coils are configured so that the spacing between the centers of the magnetic poles magnetized on the magnets coincide with each other. The method of claim 17, Flat top vibration motor, characterized in that the upper surface of the upper portion further comprises an insulator in which the winding coil and the weight body is integrally molded therein. The method of claim 17, The magnet is a flat vibration motor, characterized in that the ring-shaped magnet member in which the N, S poles are alternately magnetized in the circumferential direction.