KR100301166B1 - A flat type vibration motor of 2 phase - Google Patents

Abstract

The present invention relates to a two-phase flat vibration motor for increasing torque by increasing the amount of flux linkage to the coil while providing a more economical manufacturing by simplifying the coil structure, and for this purpose, the present invention provides a stator provided on a lower substrate. The number of poles of the magnet is at least two poles, and the amateur coil bonded to the upper substrate has a structure having a phase difference of π / 2 at an electric angle on the upper substrate, and the pair of brushes contacting the segments of the commutator The brush is connected to at least one segment by an electric angle and at the same time, it is possible to improve the driving torque by increasing the amount of magnetic flux flowing through the coil while eliminating the occurrence of starting points and non-conduction sections. will be.

Description

A flat type vibration motor of 2 phase

The present invention relates to a two-phase flat vibration motor that increases torque by increasing the amount of linkage flux flowing in a coil while providing a more economical manufacturing by simplifying the structure.

The communication and exchange of intentions with each other is generally called communication, and the representative ones that are mainly used as a means for such communication are telephone, mail, or facsimile.

In such communication means, the field of remarkable development in recent years is wireless communication technology.

Since wireless communication technology does not require communication connection means such as wires, it is a very innovative technology field that enables direct communication or communication with each other no matter how remote.

The most representative of these wireless communication technologies is personal mobile communication, and a mobile phone or a pager is mainly used as equipment for such personal mobile communication.

In particular, mobile phones capable of voice communication have exploded in number of users all over the world in recent years, replacing ordinary landline telephones, and by using satellites, they have been able to bind the world into one area of communication. have.

In addition, pagers use only text messages to deliver messages, which is less efficient than mobile phones. However, the cost of purchasing and maintaining equipment is relatively low.

In addition, as a variety of technologies, personal mobile communication equipment is being researched and developed, and this communication technology is obviously attracting attention as a high-tech industry of the future with the computer field.

On the other hand, one of the necessary functions of such communication equipment is a function of sending or receiving voice or a message, and there is an incoming function notifying the arrival of a signal.

It is mainly used as such an incoming call function, a voice function such as a melody or a bell, or a vibration function that makes the device tremble.

In other words, if the user selects a melody, bell, or vibration, which is a function required for an incoming call, the selected function is activated while the user is able to detect an incoming call.

Among these types of calls, in particular, the vibration function is intended to be provided as a consideration in order not to cause noise pollution to others in crowded public places.

As the users of mobile phones and pagers have recently increased, the noise pollution problem has developed into a social problem, and since the damage is very serious, the air supply has been limited to the legal situation.

Meanwhile, the vibration function used in the past is operated by a vibration motor separately mounted in the device. The most representative of such vibration motors is a flat vibration motor as shown in FIG. 1.

The flat vibration motor is provided with a lower case 1 at the bottom, a shaft 1a is fixed at the center of the lower case 1, and a lower substrate 1b is attached to the upper surface of the lower case 1b. The upper surface is attached with a multi-pole magnet (2) in which the N and S poles are alternately magnetized while the center penetrates up and down a certain diameter. ) Is attached to the upper end is to be made of a configuration that the two brushes (3, brush) to be positioned higher than the magnet (2) provided at different angles.

At this time, the bearing (1c) is coupled to the shaft (1a) at the top, and the rotor is provided on the outer circumferential surface of the bearing (1c) such a rotor is largely on the upper substrate 4 and the upper surface of the upper substrate (4) It is made of a plurality of winding coils 5 and the insulator 6 to be bonded, the upper substrate 4 is a shape that is cut in particular a circular plate at a predetermined angle so that the bearing 1c is coupled to the structure eccentrically supported will be.

In addition, the bottom surface of the upper substrate 4 is attached with a commutator 7 formed with a plurality of segments at equal intervals from the inner end supported by the bearing 1c, and the lower substrate to the segment of the commutator The other end of the brush 3 having one end attached thereto is in contact with 1b.

Meanwhile, a cap-shaped upper case 8 coupled to the upper end of the shaft 1a is coupled to cover parts provided to the upper portion of the lower case 1 to protect the interior from external interference.

In the vibration motor as described above, power input through the lower substrate 1b is transmitted to the commutator 7 through a pair of brushes 3, and power input to the commutator 7 is again supplied through the upper substrate 4. Transmitted to the winding coil 5, the electromagnetic force is generated by the interaction between the winding coil 5 and the magnet (2) attached to the lower case (1) while rotating the rotor eccentrically around the shaft (1a) to vibrate To be generated.

At this time, the vibration force of the rotor is transmitted to the lower case 1 and the upper case 8 through the shaft (1a) it is possible to detect the incoming through the case.

Most of these vibration motors are three-phase driving method as shown in FIG. 2, but in recent years, researches that can be miniaturized by simplifying the structure have been conducted in various fields, and as a part of this research, a single-phase driving motor has been proposed. And a two-phase drive motor.

The single phase drive motor forms only a single phase coil on the upper substrate, and the vibration is generated when the upper substrate on which the coil is seated rotates eccentrically by the interaction between the coil and the magnets facing each other. When it is located within the range of any magnetic pole, the driving force becomes zero and has a death point at which no torque is generated.

In order to solve such a loss of driving force, the proposed proposal is to provide a separate cogging generating means at an appropriate position. However, there are difficulties in spatial constraints and exact positioning of the starting point. have.

On the other hand, the two-phase drive motor has been proposed in various ways starting from the method of reducing the coil in the three-phase drive method from three phase to two phase, one of the techniques known recently as such a two-phase drive method as shown in FIG. Japanese Patent Laid-Open No. 9-9596.

The most important feature of Japanese Patent Laid-Open No. 9-9596 is that the first and second u-phase armature coils 5a and 5b and the first and second v-phase armature coils 5c and 5d are electrically angled with each other. 4 phases are arranged so that the electric angles are arranged in a phase of π / 2 between each u-phase armature coils 5a and 5b and each v-phase armature coils 5c and 5d. The armature coils are arranged eccentrically on the rotor.

That is, the first u-phase armature coil 5a and the first v-phase armature coil 5c are formed to overlap each other in the axial direction with a phase angle of π / 2, and the second u-phase armature coil 5b. The second v-phase armature coils 5d also have a phase angle of π / 2 and overlap each other in the axial direction, but coils having the same phase have a phase of 2π at an electrical angle.

Accordingly, when the first u-phase armature coil 5a is used as a reference, the first v-phase armature coil 5c is disposed at an angle of π / 2 from the first u-phase armature coil 5a to the electric angle. The second u-phase armature coil 5b is disposed at an angle of 3π / 2 from the first v-phase armature coil 5c to the electric angle, and the electric angle from the second u-phase armature coil 5b. Thus, the second v-phase armature coil 5d is disposed at an angle of? / 2.

At this time, the first u-phase armature coil 5a, the first v-phase armature coil 5c, and the second u-phase armature coil 5c and the second, which are disposed at a phase angle of? The v-phase armature coils 5d of the second phase armature coil 5c and the second u-phase armature coil 5b are positioned on top of each other, and the first u-phase armature coil 5b is disposed on the upper portion thereof. 5a) and the second v-phase armature coil 5d are positioned.

Therefore, the first u-phase armature coils 5a and the second v-phase armature coils 5d have phase differences at angles of 5π / 2 as electrical angles, which are 150 ° when viewed from a mechanical angle.

Unlike the structure described above, the structure in which the coils overlap is positioned so that the first and second u-phase armature coils 5a and 5b are positioned at the upper portion, and the first and second v-phase armature coils 5c and 5d are positioned at the lower portion. It is also possible to have a configuration such that this position.

On the other hand, the number of poles of the magnet, the number of segments of the commutator and the angle of the brush are the same as those of the three-phase drive motor, so that most three-phase drive motors have six poles, and the number of segments of the commutator is six as the number of poles. Since the brush is formed by π as the electrical angle, the brush should have an angular width of 60 °.

Therefore, two armature coils having a phase of π / 2 at an electric angle are partially overlapped with each other up and down, and a pair of armature coils are formed to correspond to each other on both sides. The four coils are arranged to be spaced apart at intervals of 3π / 2, so that the motor is driven in two phases.

However, the above structure simply omits the one-phase coil from the three-phase drive motor, and consists of only the u-phase armature coil and the v-phase armature coil, and the u-phase armature coil and the v-phase armature coil have a phase difference of π / 2 at an electric angle. Since the armature coils having the same phase are configured to be spaced apart at intervals of 2π at an electrical angle, the armature coils having different phases are inevitably formed as a laminated structure in which portions overlap each other.

Therefore, due to the characteristic that only one coil of the three-phase coil is omitted, the driving torque is inevitably lowered, and there is a limit in the mounting space of the coil that can be mounted on the motor. There is also a very difficult problem.

In addition, when the brush passes between segments, the brush collides with one side of the segment, causing a popping noise. To this end, a structure that increases the radius of the curved portion of the brush has been proposed, but at this time, it is applied to the brush. At the same time, the tension is reduced, and at the same time, a non-conduction section is generated.

The present invention is intended to correct the above problems, the main object of the present invention is to increase the number of coil windings of each phase to increase the amount of linkage flux flowing through the coil to increase the drive torque.

Another object of the present invention is to facilitate the production of the motor.

Still another object of the present invention is to ensure stable driveability by removing the starting point and non-conduction section when driving the motor.

1 is a cross-sectional view showing the structure of a general flat vibration motor,

2 is an assembly view of a coil and a magnet in a typical three-phase drive motor,

3 is a coil layout showing an embodiment of a conventional two-phase drive motor,

4 is a layout view of a coil and a magnet showing an embodiment according to the present invention;

FIG. 5 is a layout view illustrating a connection state between a segment of a commutator and a brush according to the structure of FIG. 4; FIG.

6 to 10 is a bottom view showing a connection structure of the brush and the segment of the commutator according to the present invention,

11 is a torque waveform diagram according to the present invention,

12 is a current conduction state diagram of the coil according to the present invention;

Figure 13 is a synthetic torque waveform diagram according to the present invention.

<Description of the symbols for the main parts of the drawings>

20: magnet 30: brush

40: upper substrate 50: amateur coil

70: commutator 71: segment

In order to achieve the above object, the present invention allows the number of stator magnets provided on the lower substrate to be at least 2 n poles, and the amateur coil bonded to the upper substrate has a phase difference of π / 2 at an electrical angle in the upper substrate. A pair of brushes provided in contact with the segments of the commutator is characterized in that the occurrence of the starting point or the non-conduction section can be eliminated while reducing the number of amateur coils bonded to the upper substrate while being spaced at an electrical angle of π.

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

The present invention relates to a two-phase vibration motor, and in particular, by increasing the amount of magnetic flux through the coil by appropriately combining the number of poles of the stator magnet, the pitch of the amateur coil, the phase angle between the coils having different phases, and the number of segments of the commutator The present invention relates to a two-phase vibrating motor capable of improving the efficiency of the system and enabling stable two-phase balanced driving.

That is, the lower substrate is fixed to the upper surface of the lower case, and the stator magnet is provided on the upper portion of the lower substrate, and the upper case is coupled to the upper end of the shaft while the shaft is supported at the center of the lower case and provided on the upper portion of the lower case. The parts to be protected are protected from the outside.

The upper substrate is rotatably coupled to the shaft, and an upper side of the upper substrate has an amateur coil attached thereto, and a lower portion of the upper substrate has a commutator composed of a plurality of segments, and a pair of brushes between the lower substrate and the segments of the commutator. Connected by so that the electrical signal can be transmitted smoothly.

In this configuration, the present invention forms an stator magnet with 2n poles (n is an integer of 1 or more), and the amateur coils interacting with the stator magnet are provided with two-phase coils having different phases, and the pitch of each coil Is an electrical angle of π / 2 to π, and coils having different phases have a phase difference of π / 2 as an electrical angle, and the commutator electrically connected to each coil is twice the pole number of the stator magnet. The main feature is to form a segment, and the brush connecting the lower substrate and the commutator is formed in a pair of structures spaced at an electrical angle of π.

In other words, in the present invention, the stator magnet is formed with at least 2n poles, that is, two poles, four poles, six poles, and eight poles, and the amateur coils interacting with the stator magnet have an electric pitch of π / 2 to π. It is to have a two-phase structure having a phase difference of π / 2 as an electric angle between coils having different angles while forming angles.

This allows each coil pitch of the amateur coil to be formed in an electric angle range of π / 2 to π in consideration of the characteristic that the electrical and mechanical angles of one pole vary depending on the number of poles of the stator magnet. It is intended to have a two-phase half-wave driving characteristic by having a phase difference at an electrical angle of π / 2.

According to the configuration of the stator magnet and the amateur coil, the number of segments, which are terminals of the commutator, is formed differently, but the number is formed as twice the number of poles of the stator magnet. Therefore, the segment of commutator has four segments when the stator magnet is two poles, eight segments when four poles, and twelve segments when six poles.

Each segment of the commutator thus formed is electrically connected to an amateur coil having a phase angle of π / 2 at an electrical angle of each other, and alternately connected to an amateur coil having a different phase angle in a rotational direction of the commutator.

That is, when coils of different phase angles are called coil a and coil b, the commutator has a structure of a segment in which the + terminal of coil a is connected to the + terminal of coil b and the-terminal of coil a and the terminal of coil b to terminal-coil b. It becomes.

Meanwhile, a means for supplying power to the commutator is called a brush. The brush is fixed at the lower end of the lower substrate and the upper end is formed to be bent toward the segment side so as to be in contact with the segment of the commutator. Such a brush has a pair of input terminals. And an output terminal.

The pair of brushes provided in this way is spaced apart by the electric angle of π in the present invention.

That is, when the stator magnet is two poles, the electric angle π corresponding to one pole becomes 180 ° for the mechanical angle, and for the four poles, the electric angle π corresponding to one pole is 90 ° for the mechanical angle. In the case of a pole, the electric angle π corresponding to one pole becomes 60 ° as the mechanical angle, and in the case of 8 poles, the electric angle π corresponding to one pole becomes 45 ° as the mechanical angle. Although the same π, the actual mechanical angles are 180 °, 90 °, 60 °, and 45 °, and appear at different angles.

On the other hand, in the various possible structures of the present invention, since the stator magnet has 4 poles, which shows the most stable driveability by performance experiments, a preferred embodiment of the present invention will be described.

FIG. 4 shows a first embodiment according to the present invention. In this embodiment, the armature coil 50 has four phases with the stator magnet 20 as four poles, and two coils 50a and 50b having different phases. The pitch of each of these coils 50a and 50b forms 90 ° (π) as the mechanical angle, while the center angle is 135 ° (3π as the electrical angle) between the coils 50a and 50b. / 2) to be formed spaced apart.

At this time, if the distance between the pitch of each coil 50a and 50b and the center angle between each coil 50a and 50b is converted into an electrical angle, the pitch becomes π, and the phase angle has a phase difference of π / 2 as the electrical angle. will be.

On the other hand, if the phase angle between the coils 50a and 50b is simply π / 2 as the electric angle, the angle becomes 45 ° when the angle is simply changed to the mechanical angle. Therefore, the coils 50a and 50b are formed on the upper substrate 40. Since the two coils (50a, 50b) having a different phase eventually overlap each other, this is not only structurally difficult to manufacture but also serves to reduce the driving efficiency.

Therefore, in the present embodiment, the two coils 50a and 50b have the same π / 2 as the electric angle, but when one coil is inverted by 180 ° with the mechanical angle, the coil has the same electrical characteristics as the coil of the one side. In this position, when the electric angle is moved by π / 2, the coils having different phases may have a π / 2 phase as the electric angle.

At this time, if the center angle distance of the coils 50a and 50b on both sides of different phases is measured, the mechanical angle is 135 °.

In the configuration in which the stator magnet 20 and the amateur coil 50 are formed, the segment 71 of the commutator 70 connected to the two coils 50a and 50b having different phases is as shown in FIG. 5. Likewise, the number of the stator magnets 20 is formed as eight times the number of poles, and the pair of brushes 30, which are terminals in contact with the segment 71, are separated by 90 ° (π in electrical angles) at a mechanical angle. To be arranged in such a shape.

In this case, the eight segments 71 are alternately connected to the + and-terminals of the coils 50a and 50b having different phase angles in the direction in which the upper substrate 40 rotates. As described above, when two coils 50a and 50b having different phase angles of the armature coils 50 are a coil 50a and b coil 50b, respectively, these coils 50a and 50b are respectively provided with an input terminal and Since there is an output stage, the input of a coil 50a is + a, its output is -a, the input of b coil 50b is + b, and its output is -b. The segment 71 rotates. In the order of + a, + b, -a, and -b.

Therefore, when the upper substrate 40 is rotated by the interaction between the stator magnet 20 and the amateur coil 50 in a state where the pair of brushes 30 are formed at an angle of 90 °, the pair of brushes 30 is at least Continuous driving is enabled while power is supplied to either or both coils 50a and 50b of a coil 50a or b coil 50b simultaneously.

In other words, as long as power is supplied to the input and output terminals of at least one of the two coils 50a and 50b, the motors are continuously driven while generating electromagnetic force by interaction with the stator magnet 20. Driveability can be maintained.

On the other hand, the pair of brushes 30 in contact with the segment 71 are separated between the segments 71 and the segments 71 passing therethrough, so that when the brush 30 passes between them, the pair of brushes 30 contacts the segments 71. This momentary disconnection occurs.

In addition, when contacting the segment 71 on the other side while falling from the segment 71 on one side, the contact end of the brush 30 is severely bounced by the impact impact with the segment 71 to cause a loud noise.

This phenomenon is caused by instantaneous passing of the segments 71 on both sides where the contact ends of the brushes 30 are formed in different monolayer structures and one slot 72 so as to be spaced apart at predetermined intervals between the segments 71. This is a structural problem that occurs at the same time away from the segment 71.

To this end, in the present embodiment, as shown in FIG. 6, the curved contact end 31 of the brush 30 is inclined in an oblique direction with respect to the slot portion 72 formed in a direction crossing the longitudinal direction of the brush 30. It can be formed in a shape that is in contact with at least one segment 71 or at the same time in contact with both segments (71).

Also, as shown in FIG. 7, the ends of the brush 30 are formed in the shape of a yoke, and the contact ends 31 which are curved at both ends thereof are formed, and the contact ends 31 are the slots 72. In order to be formed so as to be spaced apart from each other on both sides of the center may be formed in a shape that is in contact with at least one segment 71 or at the same time in contact with the segment 71 on both sides.

And the brush 30 is to maintain the same structure as before, while forming the slot portion 72 between the segments 71 in a straight line form from the outside of the segment 71 as shown in Figure 8 brush 30 The brush part 30 is formed so that the slot part 72 is formed on a different line, that is, the slot part 72 formed from the outside and the slot part 72 formed from the inside are positioned on different straight lines. At least a segment (at least one side) is formed between the end of the slot portion 72 formed from the outside and the end of the slot portion 72 formed from the inner side in contact with the contact end portion 31 of the brush 30 in the longitudinal direction of the brush 30. It may be formed in a shape that is in contact with the 71 or at the same time in contact with the segments 71 on both sides.

In addition, as shown in FIG. 9, the slot portion 72 may be formed to be inclined in a shape that meets the curved contact end portion 31 of the brush 30 diagonally from the outside to the inside of the segment 71.

According to the above-described configuration, the current supplied through the pair of brushes 30 flows to the a coil 50a or the b coil 50b and both coils 50a and 50b simultaneously, and interacts with the stator magnet 20. The electromagnetic force is continuously generated, and since the upper substrate 40 rotatably supported by the shaft is rotated by the generated electromagnetic force, the vibrating action by the eccentric rotation of the upper substrate 40 is stably performed.

FIG. 10 shows a second embodiment of the present invention. In this embodiment, the stator magnet 20 is formed in the same four poles as in the first embodiment, and the amateur coil 50 has different phases. A coil 50a and b coil 50b, which are two-phase coils 50a and 50b, are respectively composed of four coils: + a coil and + b coil as input coils and -a and -b coils as output coils. The most prominent feature is the ability to lose.

At this time, the pitch of each coil 50a, 50b is π / 2 in electrical angle, which is 45 ° when viewed in mechanical angle, and the center angle between each coil 50a, 50b is arranged at intervals of 45 ° in mechanical angle. Be sure to

In other words, the coils + a and + b of the input coils are arranged side by side so that the winding directions are opposite to each other, and then the output coils -a and -b coils are arranged so that the winding directions are opposite to each other. At this time, + a coil and -a coil and + b coil and -b coil having the same phase are arranged in a structure connected in series with the winding structure in the same direction.

Thus, if four armature coils 50a and 50b are arranged side by side, the phase difference between a coil 50a and b coil 50b having different phases is the same as that of the first embodiment described above. Electric angle is achieved.

In the second embodiment having such a coil structure, the number of segments 71 of the commutator 70 and the interval between the pair of brushes 30 are the same as in the first embodiment.

Also, in the second embodiment, in order to maintain a stable connection between the segment 71 of the commutator 70 and the contact end 31 of the brush 30, the brush 30 as shown in FIG. By the structure of improving the contact end portion 31 of the shape or improving the shape of the slot portion 72 between the segments 71 as shown in Figure 8 or 9 so that the energization can be performed stably.

Fig. 11 shows the characteristics of the torque waveform in the two-phase coil according to the present invention, in which the torque waveforms of coils a and b which are two-phase coils generated at this time are the same in the first and second embodiments. .

Reference numerals Ea and Eb show the waveforms of the voltage applied to the coils a and b. In the characteristic of the motor, the voltage applied to the coil causes the physical torque generation. Therefore, the waveforms of the Ea and Eb are the same as the torque waveform. .

Therefore, in view of the waveforms in the coil a and the torque in the coil b, it can be seen that the two coils have a phase difference of π / 2 at an electric angle, and the currents flowing through the coils alternate with each other as shown in FIG. In particular, when the current flows from coil a to coil b or coil b to coil a, there is a moment when current flows in each coil simultaneously. It will have the characteristics that maintain electricity.

As the current flows through the coils having different phases, the combined torque is generated from the motor as shown in FIG. 13, which shows that the driving torque is stable and continuously performed compared to the combined torque output from the single-phase motor. .

That is, in the single-phase motor, a starting point is generated in which the driving force is lost at the time when the flow of current is converted, whereas in the present invention, such starting point is completely removed, and thus it has a characteristic of always showing stable driving performance.

In addition, by improving the connection structure between the segment of the commutator and the brush, the generation of the non-conduction section where the current supply is disconnected at the time of the flow of current is eliminated, so that it is possible to maintain stable electricity continuously.

In particular, the two-phase drive motor, which has been improved from the conventional three-phase drive motor, has to maintain a coil pitch of 60 ° at a machine angle, and allows the coils having different phases to be stacked on top of each other with overlapping parts. The problem is that the thickness of the coil is inevitably reduced due to the present invention. In the present invention, two coils or four coils are arranged side by side on the same plane while the coil pitch is 90 ° or 45 ° at a mechanical angle. As the thickness of the coil becomes thicker and the number of coil windings of the coil having the same phase is increased, there is an advantage of increasing the amount of linkage flux flowing through the coil.

In other words, the coil of the two-phase drive motor, which is a variation of the three-phase drive motor, has a pitch of 60 ° at each machine angle and forms two coils of the same phase so that the coil has a total of 120 °. In the first embodiment, when the pitch of the coil is 90 ° in the mechanical angle and the thickness is formed in the same space as before, two coils are stacked up and down, whereas in this embodiment, only one coil is used. Since it is formed, it is the same as two coils having a pitch of 90 ° at the end of the mechanical angle, and thus has a total pitch of 180 °. In the second embodiment, the pitch of the coil is 45 ° at the mechanical angle, but the thickness is the first embodiment. In the same way as in the example, two coils with a pitch of 45 ° in the mechanical angle are the same, and two coils with the same phase have a pitch of 45 ° in the mechanical angle. Since it has the same thing as four coils which have, it becomes a shape with pitch of 180 degrees in total.

Therefore, the winding range of the coil was previously limited to 120 °, but in the present invention, there is an advantage of expanding to 180 °, and as a result, the number of windings of the coil having the same phase becomes larger, thereby flowing into the coil. As the amount of linkage flux increases, there is an effect of increasing the driving torque of the motor.

In addition, the structure of the conventional three-phase drive motor is improved by removing one phase coil, resulting in incomplete unbalanced drive characteristics, whereas the two-phase drive motor of the present invention has a more stable two-phase balanced drive characteristic. have.

As described above, according to the present invention, the number of poles of the stator magnets and the coils of the amateur coils and the phase difference between the coils are set constant so that the two-phase half-wave driving characteristics can be exhibited while the segments of the commutator are also magnets. The non-conductive section is eliminated by the simple improvement of the commutator and brush, which is formed by double the number of poles to increase the amount of flux linkage in coils with different phases, thereby improving driving torque, and connecting power from outside to each coil. This has the beneficial effect of providing a stable power supply to the coil and thereby providing a stable and continuous drive.

Claims (11)

A lower substrate attached to an upper surface of the lower case; A stator magnet having at least 2 n poles (n is an integer of 1 or more) provided above the lower substrate; A shaft supported between the lower case and the upper case; An upper substrate eccentrically supported and rotatably coupled to the shaft; A two-phase amateur coil attached to the upper substrate such that each phase has a phase difference of π / 2 at an electric angle; A commutator attached to a peripheral portion to which the shaft of the upper substrate is coupled, the commutator comprising a segment twice the magnetic pole number of the magnet; And A lower end is attached to the lower substrate, and the upper end is a pair of brushes formed at intervals of π at an electrical angle to contact the segments of the commutator; Two-phase flat vibration motor. A lower substrate attached to an upper surface of the lower case; A 4-pole stator magnet provided above the lower substrate; A shaft supported between the lower case and the upper case; An upper substrate eccentrically supported and rotatably coupled to the shaft; In the upper substrate, the pitch of each coil is 90 ° in the mechanical angle, the center angle between two coils having different phases is 135 ° in the mechanical angle, and the two coils have a phase difference of π / 2 in the electrical angle. An amateur coil; A commutator attached to a peripheral portion to which the shaft of the upper substrate is coupled and composed of eight segments; And A lower end is attached to the lower substrate, and the upper end is a pair of brushes formed at intervals of 90 ° at an electrical angle to contact a segment of the commutator; Two-phase flat vibration motor. The method of claim 2, wherein the brush A two-phase flat vibration motor having a shape in which the curved contact end portion is inclined in an oblique direction with respect to the slot portion formed in a direction crossing with respect to the longitudinal direction of the brush and is in contact with at least one segment or simultaneously with both segments. The method of claim 2, wherein the brush Two-phase shaped to be formed in the shape of the yoke, and the curved end portion at each of the split ends on both sides so that the contact ends are formed spaced apart from each other on both sides with respect to the slot portion so as to be in contact with at least one segment or simultaneously with both segments Flat vibration motor. The method of claim 2, wherein the inter-segment slot portion In the contact end of the brush to be formed in a straight line from the outside of the segment to the slot portion formed from the inside and the slot portion formed from the inside on the basis of the portion in contact with the brush on a different straight line A two-phase flat vibration motor having a shape in which the end portion of the slot portion formed from the outside and the end portion of the slot portion formed from the inner side meet in the longitudinal direction of the brush to be in contact with at least one segment or simultaneously with both segments. The method of claim 2, wherein the inter-segment slot portion A two-phase flat vibration motor, which is formed to be inclined in a shape that meets the curved contact end of the brush in a diagonal direction from the outside to the inside of the segment and is in contact with at least one segment or simultaneously with both segments. A lower substrate attached to an upper surface of the lower case; A 4-pole stator magnet provided above the lower substrate; A shaft supported between the lower case and the upper case; An upper substrate eccentrically supported and rotatably coupled to the shaft; In the upper substrate, the pitch of the coils is 45 ° at the mechanical angle, and each coil is spaced at 45 ° at the mechanical angle, having a phase difference of π / 2 at the electrical angle, and coils having the same phase are connected in series with each other in series. Four armature coils in which an input side coil having an output side and an output side coil having a different phase are sequentially arranged; A commutator attached to a periphery of which the shaft of the upper substrate is coupled and composed of eight segments; And A lower end is attached to the lower substrate, and the upper end is a pair of brushes formed at intervals of 90 ° at an electrical angle to contact a segment of the commutator; Two-phase flat vibration motor. The method of claim 7, wherein the brush A two-phase flat vibration motor having a shape in which the curved contact end portion is inclined in an oblique direction with respect to the slot portion formed in a direction crossing with respect to the longitudinal direction of the brush and is in contact with at least one segment or simultaneously with both segments. The method of claim 7, wherein the brush Two-phase shaped to be formed in the shape of the yoke, and the curved end portion at each of the split ends on both sides so that the contact ends are formed spaced apart from each other on both sides with respect to the slot portion so as to be in contact with at least one segment or simultaneously with both segments Flat vibration motor. The method of claim 7, wherein the slot between the segments In the contact end of the brush to be formed in a straight line from the outside of the segment to the slot portion formed from the inside and the slot portion formed from the inside on the basis of the portion in contact with the brush on a different straight line A two-phase flat vibration motor having a shape in which the end portion of the slot portion formed from the outside and the end portion of the slot portion formed from the inner side meet in the longitudinal direction of the brush to be in contact with at least one segment or simultaneously with both segments. The method of claim 7, wherein the slot between the segments A two-phase flat vibration motor, which is formed to be inclined in a shape that meets the curved contact end of the brush in a diagonal direction from the outside to the inside of the segment and is in contact with at least one segment or simultaneously with both segments.