KR200291701Y1 - Flat type vibration motor using two single-phase coils - Google Patents

Abstract

The present invention relates to a flat vibration motor, and more particularly, by connecting two single-phase coils in a predetermined manner in a vibration motor and forming a printed pattern on one or both sides of the rotor when forming a printed circuit board. The present invention relates to a flat vibration motor used in connection with a single phase coil. The flat vibration motor of the present invention is a coil means composed of a 2n-pole magnet and two single-phase winding coils joined to a stator, and the winding coils are joined to a rotor which is rotatably eccentrically supported, each of which has one end of both terminals. The common terminal c is connected to each other, and the common terminal includes a coil means to which a resistance means R is connected, and six poles of uniform size that are provided in the rotor and electrically connected to each terminal of the coil means. And a commutator composed of segments, and a brush connected to the commutator at a predetermined electric angle to connect a power source to the commutator, wherein a coil pattern is formed on the lower copper foil of the upper substrate on which the rotor is formed. Are connected in series with each other, and coil patterns are formed on upper and lower copper foils of the upper substrate on which the rotor is formed, respectively. Connected in series with the winding coil, one or more ferromagnetic pins are added at a predetermined position of the rotor so that the brush is not located at the boundary of the commutator segment when the rotor stops.

Description

FLAT TYPE VIBRATION MOTOR USING TWO SINGLE-PHASE COILS}

The present invention relates to a flat vibration motor, and more particularly, by connecting two single-phase coils in a vibration motor and forming a printed pattern on one or both sides of the rotor's printed circuit board, It relates to a flat vibration motor using two single-phase coils to be connected and used.

One of the most common forms of modern technology is communication technology, which has now evolved into wireless personal cellular communication. The personal mobile communication is to communicate the intention between individuals using a variety of communication means, the representative communication equipment used is a mobile phone and a pager.

One of the essential functions of using such communication equipment is the incoming call function. In other words, in order to receive a call or a message, a user of a communication device needs to be able to know this, and therefore an incoming function is required. The most commonly used type of the incoming function is a melody or a vibration such as a bell and a device that vibrate. In other words, if the user selects a function required for the incoming call in advance, the selected function is activated at the time of the incoming call so that the user can detect the incoming call.

Among these various types of incoming calls, the vibrating function is used mainly as a consideration to avoid the damage or disturbance caused by noise to others in a crowded place. Such a vibration function is to mount the small vibration motor in the device and then drive it so that the vibration force is transmitted to the case of the device so that the device can vibrate.

1 is a view showing a sectional view of a flat vibration motor, which is a typical structure of such a vibration motor. The flat vibration motor includes 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.

The upper surface of the lower substrate 1b is attached with a multi-pole magnet 2 in which the center penetrates up and down a certain diameter and alternately magnetizes the N and S poles, and the penetrated central space portion of the magnet 2 is attached. In the lower part is attached to the lower substrate (1b) is provided with two brushes (3) at different angles so that the top is positioned higher than the magnet (2).

The bearing 1c is coupled upwardly to the shaft 1a, and the semicircular rotor is eccentrically supported on the outer circumferential surface of the bearing 1c. At this time, the rotor forms a semicircle having a small diameter on one side from the inner end supported by the bearing 1c, and an upper surface of the upper substrate 4 and the large diameter portion of the upper substrate 4 having a semicircle having a large diameter on the other side. And a plurality of winding coils 5 bonded to each other and an insulator 6 covering the upper surface except for the winding coils 5.

In addition, the bottom surface of the upper substrate 4 is attached to the commutator 7 formed with a plurality of segments at equal intervals from the inner end supported by the bearing (1c), the commutator 7 is attached to the lower substrate (1b) The upper end of the brush 3 to which the lower end is fixed is contacted.

On the other hand, the upper end of the shaft (1a) cap-shaped upper case 8 is fixedly coupled to cover the components provided to the upper portion of the lower case 1 to be blocked from external interference.

The vibration motor having such a configuration transmits power input through the lower substrate 1b to the commutator 7 through a pair of brushes 3, and power input to the commutator 7 again transfers the upper substrate 4. It is transmitted to the winding coil 5 through, and the rotor is rotated about the shaft 1a by the interaction between the winding coil 5 and the magnet 2 attached to the lower case 1.

At this time, since the rotor is eccentrically supported by the shaft 1a, side pressure is generated at the shaft 1a when the rotor rotates, and the side pressure acts at the same time as the rotor rotates, so that the lower case 1 and the upper case through the shaft 1a. As the vibration force of the shaft 1a is transmitted to (8), the incoming call can be detected.

Since the vibration motor is used in a small communication device, it is important to miniaturize the vibration motor, and it is not easy to mount a large-capacity winding coil in a limited space on the upper substrate.

The present invention provides a flat vibration motor for connecting two single-phase coils in a vibration motor in a predetermined manner, and forming a printed pattern on one or both sides of the rotor to connect the single-phase coils. It is.

Another object of the present invention is to increase the efficiency of the motor by using one or more pins in the vibration motor.

1 is a cross-sectional view of a flat vibration motor, which is a typical structure of a vibration motor

2 is a connection diagram of two single-phase coils connected at one end

3 shows a commutator with six segments

4 is a current waveform diagram when one end of two single-phase coils is connected and connected to a six-pole commutator.

5 is a connection diagram of two single-phase coils according to the present invention

6 is a current waveform diagram when one end of two single-phase coils according to the present invention is connected and connected to a six-pole commutator.

7 is a coil connection diagram according to another embodiment of the present invention

8 is a coil connection diagram according to another embodiment of the present invention

9 is an operation diagram of the flat vibration motor according to the present invention

* Description of the symbols for the main parts of the drawings *

2: permanent magnet 3: brush

4: upper substrate 5: coil

7: commutator

In order to achieve this object, a flat vibration motor using two single-phase coils according to the present invention is a coil means consisting of a magnet of 2n poles joined to a stator and two single-phase winding coils, and the winding coils are rotatable. Each of which is connected to an eccentrically supported rotor, one end of each of which is connected to each other by a common terminal (c), and the common means is provided with a coil means to which a resistance means (R) is connected; It comprises a commutator consisting of six pole segments of uniform size electrically connected to each terminal, and a brush connected to the commutator at a predetermined electric angle to connect power to the commutator.

In addition, the flat vibration motor according to the present invention is characterized in that the coil pattern is formed on the lower copper foil of the upper substrate on which the rotor is formed is connected in series with each of the winding coils.

In addition, the flat vibration motor according to the present invention is characterized in that the coil patterns are formed on the upper and lower copper foils of the upper substrate on which the rotor is formed, and are connected in series to the respective winding coils.

In addition, the flat vibration motor according to the present invention is characterized in that one or more ferromagnetic pins are added at a predetermined position of the rotor so that the brush is not positioned at the boundary of the commutator segment when the rotor stops.

(Example)

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments used herein are for convenience in describing the invention, but are not intended to limit the invention to these embodiments. It can be seen that the present invention is limited only by the appended claims.

2 is a coil developed view of a flat vibration motor according to the present invention, Figure 3 is a view showing a commutator having six segments.

Two single-phase coils (A, B) were used as the vibration motor coil of the present invention, and the commutator is characterized by consisting of six segments (a, b, c, a, b, c). On the other hand, the two single-phase coil (A, B) can be seen in the figure, one end is connected to each other. Thus, each terminal of the coil is connected to the corresponding segment. That is, the a terminal of the coil is connected to the a segment of the commutator, the b terminal of the coil is connected to the b segment of the commutator, and the c terminal of the coil is connected to the c segment of the commutator. And segments a, a and b, b and c, c are used in connection with each other.

Thus, the current waveform when one end of two single-phase coils are connected and connected to a six-pole commutator is shown in FIG. As can be seen in the figure, the current first flows through terminal a and flows to terminal c via winding coil A, then flows through terminal c and flows to terminal b via winding coil B. Finally, it flows through terminal a and flows through terminal b via coils A and B. Therefore, as shown in FIG. 4, two relatively large current waveforms followed by a relatively small current waveform are periodically repeated. In this case, since the current waveform generated in each coil is not constant, the electromagnetic force generated in the coil is also not constant, and thus the relative motion with the permanent magnet is also expected to be relatively less stable. That is, when the generated current waveform is periodically changed as shown in FIG. 4, the wear of the brush and the commutator may proceed rapidly, and thus the life of the motor may be shortened. In addition, noise other than vibration may be generated from the motor.

Thus, in the present invention, in order to solve this problem, the resistor R is connected to the contact terminals of both winding coils A and B as shown in FIG. The current waveform when the vibration motor is driven by connecting such a resistor is shown in FIG. 6. Comparing FIG. 6 with FIG. 4, it can be seen that the current waveform always occurs constantly when a resistor is added to the contact terminals of both winding coils. As the current waveform is stabilized in this way, the above-mentioned problem is solved or reduced. That is, the vibration motor is driven stably, by preventing the wear of the brush and commutator can be extended the life of the motor, it is possible to reduce the noise.

On the other hand, according to another embodiment of the coil according to the present invention, by forming a pattern coil on the copper foil of the lower surface of the upper substrate 4, it has a structure that can be used in series with the winding coil. That is, the structure of the upper board | substrate 4 consists of a structure in which conductor plates, such as copper foil, are apply | coated on the upper and lower surfaces of an insulator, and an insulating film is again apply | coated on the said conductor plate again. After the coil pattern is formed on the lower conductor plate, the coil pattern is connected to the winding coils A and B formed on the upper substrate in series.

FIG. 7 is a view showing a shape in which the pattern coils A and B formed on the lower copper foil of the upper substrate are connected in series to the winding coils A and B formed on the upper substrate 4 in series. In this way, an effect similar to that when the winding coil is largely formed in a narrow space on the upper substrate 4 can be obtained.

FIG. 8 illustrates a shape in which two pattern coils A, A 'and B, B' are connected to each of the winding coils A and B formed on the upper substrate 4 as another embodiment of the present invention. Figure is shown. One of the pattern coils A and A 'may be formed on the lower copper foil of the upper substrate 4 as in the embodiment of FIG. 7, and the other of the pattern coils may be formed on the upper portion of the upper substrate 4. It can form on copper foil. In addition, although the winding coil A is shown as being connected between the pattern coils A and A 'in the embodiment of the figure, this is only one example, and the winding coil A is the pattern coils A and A'. It may be connected to the front of the back) or to the rear thereof. In this way, the internal space of the vibration motor can be utilized to the maximum.

9 is an operation diagram of the flat vibration motor according to the present invention. In the vibration motor of the present invention, as described above, two single-phase coils are connected and used at the contact point c, and each winding coil is formed on a copper foil of the upper and / or lower surface of the upper substrate 4 as necessary. Used in series with the coil, the commutator uses 6 poles. In the coil structure of FIGS. 2, 5, 7 and 8 the terminals a, b, c are connected to the commutator segments a, b, c. Of course, the segments of the same symbol among the six segments, that is, a, a and b, b and c, c are electrically connected to each other.

Assuming that the brush is placed at an angle of 90 °, when the power is connected to the commutator through the brush, it can be seen that the power is first connected to the b and c of the commutator (ⅰ). At this time, the power is supplied only to the coil B, it can be seen that the + terminal is connected to the start point (s) of the coil B and the-terminal is connected to the end point (e) of the coil B. At this time, an electric force is generated as current flows in the coil B, and this force interacts with the permanent magnet in the lower part to move the rotor to cause rotational force.

Then, when the rotor is rotated so that the brush is connected to a and b of the commutator (류), power is supplied to the winding coil B and the winding coil A so that current flows through the coils B and A. At this time, the electromagnetic force generated in the coils A and B and the permanent magnet at the bottom interact to rotate the rotor.

Subsequently, when the rotor is further rotated so that the brush is connected to the a and c of the commutator (i), power is supplied only to the coil A and flows from the end point e of the coil A to the start point s to generate an electromagnetic force. This force also interacts with the underlying permanent magnet to move the rotor, causing a rotational force. By repeating the above process, two coils and a six-pole commutator are connected to transmit the rotational force to the motor. Here, the coils A and B may be formed of only winding coils, or a pattern coil formed on upper and lower surfaces of the upper substrate may be connected to the winding coils in series.

On the other hand, as can be seen in FIG. 9 (ii), assuming that the brush is seated at the boundary of the commutator segment when the vibration motor is stopped, the operation may not be performed quickly when attempting to start again. To compensate for this, the magnetic pins may be fixedly positioned at predetermined positions of the rotor such that the brush is always located in the middle of the segment of the commutator. Such fins will attach ferromagnetic materials, such as ferrite fins, as is already known. Due to the action of the ferrite pin of the ferromagnetic material, when the power is not applied, the brush is always positioned in the middle of each segment of the commutator, so that the energization is immediately performed upon restart. A plurality of pins may be used.

As described above, by implementing the present invention, a six-pole commutator and two single-phase coils can be used in constructing a vibration motor, and a pattern coil is formed on copper foils on the upper and lower surfaces of the upper substrate 4 to be connected in series with the winding coil. By using it, the internal space of the vibration motor can be efficiently utilized.

Claims (4)

Magnet of 2n pole joined to stator, A coil means consisting of two single-phase winding coils, the winding coils being joined to a rotatable eccentrically supported rotor, each of which has one end connected to each other through a common terminal (c), the resistance means (R) ) Coil means to be connected, A commutator provided in the rotor and composed of a six-pole segment of uniform size electrically connected to each terminal of the coil means; Flat vibration motor using two single-phase coil characterized in that it comprises a brush connected to the commutator at a predetermined electric angle to connect the power supply to the commutator. The method of claim 1, A flat pattern vibration motor using two single-phase coils, characterized in that a coil pattern is formed on the lower copper foil of the upper substrate on which the rotor is formed, and connected in series to the respective winding coils. The method of claim 1, A flat vibration motor using two single-phase coils, each of which has a coil pattern formed on the upper and lower copper foils of the upper substrate on which the rotor is formed, and connected in series to the respective winding coils. The method according to any one of claims 1 to 3, A flat vibration motor using two single-phase coils, wherein one or more ferromagnetic pins are added at predetermined positions of the rotor such that the brush is not positioned at the boundary of the commutator segment when the rotor stops.