KR100413006B1 - The flat vibration motor - Google Patents

Abstract

The present invention provides a flat vibration motor with two armature coils, which reduces the manufacturing cost and has no starting point, and the brush continues to contact the contaminator even when the voltage is stopped and the rotor stops. In addition, since the force acting in the same direction on the electric coil by the stator's magnetic field can flow a current to the electric coil so that a certain trouble can be generated, the rotor is certainly fixed in the fixed direction without regulating the stop position of the rotor. It is made possible by the present invention to start and rotate.

Description

Flat Vibration Motors {THE FLAT VIBRATION MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact flat vibration motor used for making incoming calls to a mobile phone or a pager for vibration.

Conventionally, flat iron vibration vibration motors of this type have generally been used. The flat ironless vibration motor is composed of a magnet part fixed to the lower part of the casing, a circular rotor of a rotating material arranged so as to face the magnet part, and a shaft arranged at the waist of the rotor. The three armature coils are disposed together with the resin material, and the rotor itself is eccentric so that the centrifugal force generated during the rotation of the rotor generates vibration and the three armature coils are mounted on the rotor so that no starting point is generated. It is designed.

The flat vibration motor of the prior art requires at least three coils because torque is generated by the magnet and the magnetic field for three coils in which the directions of current flow are interchanged. This is because when the rotor is stopped in an electric coil with a rotation angle of about 90 degrees or less, no rotational force is generated in the armature coil located in the middle of the magnet polarity. It was impossible to shorten the coil.

The present invention is to solve the problems of the above-described technology, to reduce the manufacturing cost by using two armature coils, and at the same time characterized by providing a flat vibration motor with no starting point.

In order to solve the above problems, the flat vibration motor according to the present invention has the following requirements.

In the flat type vibration motor which consists of the stator 4 of the ring form divided into 8 poles by the N pole and the S pole, and the rotor 5 which opposes the said stator, the angle which winds a coil around the rotor 5 is 60 degrees. First and second armature coils 11a and 11b which are formed in a roadway and have 90 degrees of mutual separation by a non-magnetic weight member; and are installed below the rotor 5 and provided with the first armature coil. The first, fourth, seventh, and tenth contributors 10a, 10d, 10g, and 10j connected to the first conductor where the winding of 11a starts, and the windings of the second armature coil 11b to start. 2nd, 5, 8, 11 condenser 10b, 10e, 10h, 10k connected to the 3rd conductor 20c, and the 2nd conductive which the winding of the said 1st and 2nd armature coils 11a, 11b ends. A condenser substrate 14 on which third, six, nine, and twelve condensers 10c, 10f, 10i, and 10l are connected to the sieve 20b; and supplying electric power to the armature coils 11a and 11b. And the cone It characterized in that it comprises an electric angle 135 degrees the brush 12, which is formed so as to be in contact with the mutator.

1 is an exploded perspective view of a flat vibration motor of the present invention

FIG. 2 is a longitudinal sectional view of an essential part of the flat vibration motor of FIG.

Figure 3 is a plan view of the brush of the present invention

4 (a) to 4 (c) are cross-sectional views taken along the line X-X 'of the rotor in plan view, bottom view and plan view.

5A and 5B are a plan view and a bottom view of a concentrator substrate

Fig. 6 (a) (b) is an exploded state diagram of the motor showing the connection diagram of the rotor and the positions of the rotor, the conator, the stator, and the brush contact.

7 (a) to 7 (d) are operating state diagrams showing the principle of rotation of the motor when the rotor is located at 0 ° to 45 °.

8 (a) to (d) are operating state diagrams showing the principle of rotation of the motor when the rotor is located at 60 to 105 degrees.

9 (a) to 9 (d) are operating state diagrams showing the principle of rotation of the motor when the rotor is located at 120 ° to 165 °.

Fig. 10 is an operating state diagram of the motor when the arrangement position of the armature coil of the present invention is set to 165 degrees.

※ Explanation of code for main part of drawing ※

3: casing 4: stator

5 rotor 10 conator

11: armature coil 12: brush

14: condenser substrate 20a: first conductor (printed wiring)

20b: Second conductor (printed wiring) 20c: Third conductor (printed wiring)

21: weight member

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

1 and 2, this motor is a casing (3) consisting of a flat cylindrical case (1) with a closed top and a disc shaped bracket (2) fitted to an opening (17) at the lower end of the case (1). The ring stator 4 and the circular rotor 5 are arranged inside the slit.

In the bracket 2, a ring-shaped stator 4 and a condenser 10, which will be described later, are connected to the lower end of the rotor 5, and a brush 12a for flowing current through the armature coil 11 ( 12b) is soldered on the broth base 13 formed to solder the lead wire not indicated at the end and to be connected to the power source, and the brush 12a of the positive electrode and the brush 12b of the negative electrode are as shown in FIG. Contact points a, b, and c are formed to be in contact with the condenser 10 at an electric angle of 135 degrees.

In addition, the stator 4 is composed of eight stators (4a ~ 4h) formed in a weak line of 45 degrees each, each divided into eight equal to the peripheral direction, each stator is magnetized to the pole of the N pole and the S pole to 2 on the boundary of the magnetic pole The two brushes 12a and 12b are fixed on the bracket 2 by appropriate means such as adhesive so that the contact portions in contact with the condenser 10 can coincide. The rotor 5 is shown in Fig. 4A. As shown in (b) and (c), the first, second, flat, 60-degree flat line with the rotational shaft 16 installed at the center of the rotor 5 and the pitch of the arrangement disposed at 120 degrees A non-magnetic metal disposed between two armature coils 11a and 11b and the first armature coil 11a and the second armature coil 11b. The weight member 21 is formed together with the resin 15 on the circular conduit substrate 14, and is formed as shown in Figs. The conduit substrate is attached to the metal 18 fitting the front shaft 16 to the opening 17 formed at the center of the case 1 and the metal 18 'fitting to the opening 19 formed at the center of the bracket 2. The surface 14 faces the stator 4 and is supported by the rotating material of the casing 3.

As shown in FIGS. 5A and 5B, the first armature coil 11a, the second armature coil 11b, and the weight member 21 are fixed to the resin 15 and formed on the bottom surface. A plan view and a bottom view of the data substrate 14 are shown, and the hands of the first armature coil 11a and the second armature coil 11b are soldered to the surface of the conduit substrate 14, respectively. The printed wirings 20a, 20b, and 20c, which are conductors, are formed, and the start end of the first armature coil 11a is formed on the inverted attaching portion 23 of the printed wiring 20a, which is the first conductor. Terminals of the first armature coil 11a and the second armature coil 11b are soldered to the inverted attachment 24 of the printed wiring 20c, which is the third conductor, respectively.

In addition, as shown in FIG. 5B, twelve concentrators 10a to 10l are radially disposed on the surface of the concentrator substrate 14, so that the first, fourth, seventh, and tenth concentrators are disposed. (10a) (10d) (10g) (10j) are short-circuited to the printed wiring (20a) of the first conductor through the through holes (30a to 30d), and the third, sixth, ninth, and twelfth capacitors (10c). 10f, 10i, and 10l are short-circuited to the printed wiring 20b, which is the second conductor, through the through holes 31a to 31d, and the second, fifth, eighth, and eleventh capacitors 10b ( 10e, 10h, and 10k are short-circuited to the printed wiring 20c, which is the third conductor, through the ring-shaped through hole 33, so that the first and second armature coils (as shown in FIG. Corresponding to 11a) and 11b, the twelve contributors 10a to 10l and the armature coils 11a and 11b have a connected configuration as shown in the connection diagram of FIG.

Reference numeral 35 in Fig. 6 (a) denotes an electric noise prevention resistor, and Fig. 6 (b) shows the contact points of the rotor 5, the contators 10a to 10l, the stators 4a to 4h, and the brushes 12a and 12b. A diagram showing the relative positions of a and b is shown.

7, 8, and 9 show the operating state of the present invention, so that the brushes 12a and 12b are positioned between the rotor 5 and the stator 4, and thus the intervals applied to the armature coils 11a and 11b. The force is applied to the armature coils 11a and 11b in a constant direction by the direction of the current flowing through the armature coils 11a and 11b and the left hand rule of framing by the magnetic field of the stator 4, If the rotor 5 rotates due to this rotational force, and no voltage flows, no current flows through the residue coils 11a and 11b, so that the force of the magnetic field of the stator 4 is not applied to the rotor 5. Rotation stops, but the stopping position is not particularly determined.

Therefore, the examples described later describe how to configure the start point to be independent of the stop position.

Fig. 7 (a) shows the position when the rotor 5 is 0 degrees, and the electric current is the brush 12a → conductor 10h → armature coil 11b → conductor 10f → conductor 10c. ? Brush 12b flows in the direction of the arrow, and according to the law of the left hand of framing, a rotational force of 2F is generated between the stator 4d and 4e and the armature coil 11b in the direction of arrows A and A '. The rotor 5 is started.

Fig. 7 (b) shows the position when the rotor 5 is 15 degrees, and the electric current is the brush 12a → conductor 10g → conductor 10d → armature coil 11a → conductor 10h. ¡Æ in the direction of arrows B and B 'between the stator 4a and 4b and the armature coil 11a, according to the left-hand rule of framing, because it flows in the direction of the arrow in the order of condenser 10b to brush 12b. A rotation force of 2F is generated to start the rotor 5.

Fig. 7 (c) shows the position when the rotor 5 is 30 degrees, and the electric current is the brush 12a → conductor 10f → armature coil 11b → conductor 10h → conductor 10b. ? Brushing 12b and condenser 10g → conductor 10d → armature coil 11a → conductor 10h → conductor 10b → brush 12b By the law of the left hand of the rotor, the rotation force of 2F is generated between the stator 4a and the armature coil 11a and between the stator 4f and the armature coil 11b in the direction of arrows C and C 'and the rotor 5 is started. It is to let.

Fig. 7 (d) shows the position when the rotor 5 is 45 degrees, and the electric current is the brush 12a → conductor 10f → armature coil 11b → conductor 10h → conductor 10b. ¡Æ since the current flows in the direction of the arrow in the order of the brush 12b, the rotational force of 2F in the direction of arrows D and D 'between the stator 4e (4f) and the armature coil 11b by the left-hand rule of framing Is generated to start the rotor 5.

Similarly, FIGS. 8A to 8D show when the rotor 5 is located at 60 degrees, 75 degrees, 90 degrees and 105 degrees, and FIGS. 9A to 9D show the rotor ( 5) is located at 120 degrees, 135 degrees, 150 degrees, 165 degrees, it is possible to start even if the rotor 5 is located as described above, and the rotor 5 is not shown in the drawing, but the rotor 5 is 165 degrees ~ Maneuvering is smoothly in any position at 360 degrees.

As described above, even when the rotor 5 stops at any position, since the brushes 12a and 12b are always in contact with the condulator 10, the current supplied by the brushes 12a and 12b as an object is stator 4. It is selective to one or two directions of the armature coils 11a and 11b so that a force acting in the same direction in one direction or two directions of the armature coils 11a and 11b by the magnetic field of Because of this, the vibration motor without starting dead point can be realized without restricting the stop position of the rotor 5 to a predetermined position.

7 (a)-(d), 8 (a)-(d), and 9 (a)-(d) illustrate that the rotor 5 can be started at any position, and the rotor (5) indicates that the rotor 12 is continuously rotating in the same direction, and corresponding to the stator 4 in one or two directions of the armature coils 11a and 11b while the voltage is supplied to the brushes 12a and 12b. Rotation can be continued because a current flows so that a constant rotation torque 2F occurs in a constant direction.

10 (a) to 10 (d) show a case in which the armature coils 11a and 11b have an arrangement angle of 165 degrees. In the case of FIG. 10 (a), between the armature coil 11b and the stator 4d. In FIG. 10 (b), a rotation force of 2F is generated in the directions of arrows W and W 'between the armature coil 11a and the stator 4a and 4b, and FIG. (c) A rotation force of 3F is generated in the directions of arrows X, X 'and X "between the armature coil 11a and the stator 4a and the armature coil 11b and the stator 4e and 4f, and FIG. (d) The rotational force of F is generated in the direction of the arrow Y between the armature coil 11b and the stator 4e. If the rotational force is not stable with F to 3F, the rotational force may not start at F. Therefore, it is impossible to rotate the motor having the arrangement position of the present invention at 150 degrees with the same rotational force 2F and other stable torques that differ in the result.

According to the present invention, even when the voltage to the motor stops the supply and the rotor stops, the brush remains in contact with the conductor, and a force acting in the same direction on the electric coil by a magnetic field of the stator generates a certain trouble. Since it is possible to flow an electric current to an electric coil so that it can be made, it became possible by this invention to start and rotate a rotor to a certain direction reliably, without restricting the stop position of a rotor.

Therefore, due to the circular rotor, the resistance of the secondary device is reduced to prevent noise generation, thereby extending the life of the motor, and as a whole, because the large weight member is installed, its size is small, and it is stronger than the conventional motor. Can cause

In addition, since the number of coils is two, the manufacturing cost of the motor is reduced, and there is no need to install specially processed coils and add special parts to specify the stopping position of the rotor. The motor can be improved and a motor with high production efficiency can be made.

Claims (1)

In the flat vibration motor comprising a stator 4 in a ring form divided into eight poles of an N pole and an S pole, and a rotor 5 facing the stator, First and second armature coils (11a, 11b) having a coil winding angle of 60 degrees formed on the rotor (5), the mutually spaced interval being formed at 90 degrees by a weight member of a nonmagnetic material; First, fourth, seventh and tenth contributors 10a, 10d, 10g, and 10j installed under the rotor 5 and connected to the first conductor where the winding of the first armature coil 11a starts. And second, fifth, eighth and eleven concentrators 10b, 10e, 10h, and 10k connected to the third conductor 20c at which the winding of the second armature coil 11b starts. A condenser substrate on which third, sixth, ninth, and twentieth contributors 10c, 10f, 10i, and 10l are connected to the second conductor 20b at which the windings of the second armature coils 11a and 11b end. 14); And a brush (12) for supplying electric power to the armature coils (11a, 11b), the brush (12) being formed to be in contact with the condenser at an electric angle of 135 degrees.