KR20070046307A - Brushless flat-type vibration motor - Google Patents

Abstract

The present invention relates to the overall structure of a brushless type flat vibration motor without a brush and a commutator,

With the lower case,

A flexible circuit board mounted on the lower case;

An upper case set made of magnetic material and non-magnetic material for cogging torque generation function,

A shaft mounted between the lower case and the upper case;

It consists of a multi-pole magnetized permanent magnet, and an epoxy plate that is mounted on top of the weight causing the eccentric force on the outside of the permanent magnet is injected into the injection molding.

Cogging torque generating part, epoxy board, permanent magnet

Description

BRUSHLESS FLAT-TYPE VIBRATION MOTOR

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

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

3 is a plan view of the upper case of the brushless type flat vibration motor according to the present invention.

4 is a cross-sectional view of the upper case of the brushless type flat vibration motor according to the present invention.

5 is a plan view of a stator assembly of a brushless type flat vibration motor according to the present invention.

6 is a plan view of the epoxy plate of the brushless type flat vibration motor according to the present invention.

7 is a cross-sectional view of the epoxy plate of the brushless type flat vibration motor according to the present invention.

8 is a bottom view of the weight of a brushless type flat vibration motor according to the present invention.

9 is a side view of a weight of a brushless type flat vibration motor according to the present invention.

10 is a plan view of the rotor of the brushless type flat vibration motor according to the present invention.

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

12 is a plan view of a rotor of a brushless type flat vibration motor according to the present invention.

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

14 is a plan view of the upper case of the brushless type flat vibration motor according to the present invention.

15 is a cross-sectional view of the upper case of the brushless type flat vibration motor according to the present invention.

16 is a plan view of the upper case of the brushless type flat vibration motor according to the present invention.

17 is a cross-sectional view of the upper case of the brushless type flat vibration motor according to the present invention.

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

19 is a plan view of a rotor of a brushless type flat vibration motor according to the present invention.

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

21 is a perspective view of the weight of a flat brushless vibration motor according to the present invention.

22 is a plan view of the epoxy plate of the flat brushless vibration motor according to the present invention.

Figure 23 is a perspective view of the weight of the flat brushless vibration motor according to the present invention

24 is a plan view of the epoxy plate of the flat brushless vibration motor according to the present invention;

25 is a perspective view of the weight of a flat brushless vibration motor according to the present invention.

26 is a plan view of the epoxy plate of the flat brushless vibration motor according to the present invention.

27 is a perspective view of the weight of a flat brushless vibration motor according to the present invention.

28 is a plan view of the epoxy plate of the flat brushless vibration motor according to the present invention.

29 is a perspective view of the weight of a flat brushless vibration motor according to the present invention.

30 is a plan view of the epoxy plate of the flat brushless vibration motor according to the present invention.

31 is a cross-sectional view of another embodiment of a flat brushless vibration motor according to the present invention.

32 shows a section through the rotor according to FIG. 31;

33 is a sectional view of another form of the rotor according to FIG. 31;

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

52: lower case 54, 254, 354: upper case

55 rib 56 flexible circuit board

58: drive IC 60: coil

62: shaft 64: washer

66: bearing 68: slide sheet

72, 272: cover bracket 78: weight

82: rotor bracket 88: permanent magnet

152, 155, 182, 273, 355: Rib

154, 451, 461: cutout 166: bearing

450, 460: cogging torque generating unit 452, 462: center hole

453 wings

The present invention relates to a brushless type flat vibration motor, and more particularly, to the entire structure of a brushless type flat vibration motor without a brush and a commutator.

Referring to FIG. 1, in the conventional brushless type vibration motor, an upper case 12 is coupled to a lower case 10, and a cogging torque generator configured to accurately set a starting position of a magnet on the lower case 10 ( 18 and a flexible circuit board 14 are seated on the cogging torque generation unit 18.

On the flexible circuit board 14, a Hall sensor 16 for detecting magnetic poles and magnetic pole positions of the permanent magnet 30, a coil 20 and a driving IC 22 for generating a rotating magnetic field to rotate the permanent magnet 30. ) Is seated.

The shaft 24 is supported by a washer 26 mounted at its lower portion to the burring portion 11 of the lower case 10 and at its upper portion below the upper case 12. A bearing 28 supports the shaft 24 under the washer 26. A yoke 40 is fixed to the outer circumference of the bearing 28, and a permanent magnet is attached to the lower part of the yoke and a weight is provided on the outer circumferential side. 34 is mounted to form a rotor.

The conventional brushless vibration motor as described above does not use a brush and a commutator that cause electrical noise and sparks, compared with a brush type vibration motor, and thus has an advantage of improved durability and reliability. However, instead of brushes and commutators, Hall devices and driving ICs that detect magnetic poles are used, and cogging torque generating means must be added due to the occurrence of a starting point, thereby increasing the cost of the product and increasing the thickness of the product. In addition, the rotor and the assembly structure, there is a disadvantage that the components of the rotor is not firmly constrained when the bonding process is applied.

In addition, the conventional COIN-type vibration motor has a problem of life due to electrical noise and spark as a brush-type vibration motor. On the other hand, brushless vibration motors have the advantages of improved durability, reduced electrical noise and reliability. The conventional brush type and brushless type cover structures simply exclude the functionality by covering the internal parts. In order to eliminate the starting point of the brushless type vibration motor, a bracket was attached to the lower case bracket or a part of the lower bracket was raised to induce cogging torque. In case of using the bracket, the shaft could not be supported, so the shaft was supported by other means such as welding and bonding, and the base member (PCB integrated with the driving circuit and coil) was adhered to it, resulting in unnatural lifting and selection of materials. . When inducing the occurrence of cogging torque by lifting a part of the lower case bracket, there is a disadvantage in that foreign matter from the outside is introduced into the motor to cause noise. In addition, the thicker the rotor, the greater the overall thickness, resulting in lower internal space utilization.

In the case of the rotor of a conventional brushless vibration motor, the soft magnetic metal plate is used to fix the magnet and the weight by adhesive, and the bearing is press-fitted to fix the bearing and the deformation of the metal plate. It was difficult to simplify, and there was a concern that the use of metal plate would adversely affect the magnetic properties. In the conventional injection type rotor, the magnet and the weight are not easily fixed, and thus there is a difficulty in configuring the rotor. Since there is no means to fix the weight and magnet in the injection mold, the magnet was adhesively fixed by bonding using a large amount of bond after the injection was completed, so it was difficult to increase the cost and simplify the process.

The present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to provide a brushless type vibration motor which is guaranteed durability and reliability by improving the assembly structure of the rotor.

In addition, an object of the present invention is to provide a brushless type vibration motor capable of reducing the cost and size of the product by integrally disposing a cogging torque generating means that suppresses the occurrence of a starting point.

As an example of a brushless type flat vibration motor according to the present invention,

With the lower case,

A flexible circuit board mounted on the lower case;

An upper case set made of magnetic material and non-magnetic material for cogging torque generation function,

A shaft mounted between the lower case and the upper case;

Multi-pole magnetized permanent magnet, and an epoxy plate that is mounted on the upper side of the permanent magnet and the weight causing the eccentric force is injected into the injection molding

It consists of.

As another example of the present invention,

With the lower case,

A flexible circuit board mounted on the lower case;

An upper case set made of magnetic material and non-magnetic material for cogging torque generation function,

A shaft mounted between the lower case and the upper case;

Epoxy sheet material that has a multi-pole magnetized permanent magnet and a weight causing eccentric force on the outside of the permanent magnet is mounted on the upper part and injected into the injection molding, and mounted on the shaft to increase the eccentric force of the weight.

It consists of.

The soft magnetic plate is attached to the permanent magnet.

A hole is formed in the weight storage portion of the weight, and a protrusion is formed in the bottom surface of the weight, and the protrusion of the weight is inserted and fixed in the hole of the weight storage portion.

A protrusion is formed in the weight storage portion of the weight, and a groove is formed in the bottom of the weight, and the protrusion of the weight storage portion is inserted into and fixed to the groove of the weight.

The upper case is formed with one or more cutouts.

A cover bracket of a nonmagnetic material is covered on the upper case.

A rib is provided at the center of the cover bracket.

The non-magnetic injection molded product is fixed to the cutout portion.

The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion, the insertion groove is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted into the insertion groove of the epoxy plate material It is fixed.

The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion bordered on one side of the bottom surface, the aperture is formed in the weight storage portion of the epoxy plate, the bottom insertion portion of the weight is a It is inserted into the chew and fixed.

The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom side, the aperture is formed on both sides of the weight storage portion of the epoxy plate is formed, the bottom insertion portion of the weight is inserted into the aperture of the epoxy plate Is fixed.

The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom, an insertion portion rounded on both sides is formed in the weight storage portion of the epoxy plate, the bottom insertion portion of the weight is inserted and fixed to the insert portion of the epoxy plate .

Both sides are rounded at the bottom of the main body of the weight, and a bottom insert having a double length is provided, and an insert portion having a double length and a rounded side is formed at the weight storage portion of the epoxy sheet, and the bottom insert of the weight is an epoxy sheet It is inserted into the insertion part of and fixed.

2, in the brushless type flat vibration motor according to the present embodiment, a flexible circuit board 56 is mounted on a lower case 52 having a circular rib 152 in the center thereof.

On the flexible circuit board 56, a drive IC 58 incorporating a hall sensor and a drive driver for detecting magnetic poles and magnetic pole positions of the permanent magnets 88, and a coil for rotating the permanent magnets 88 by generating a rotating magnetic field. 60 is seated. Instead of the integrated drive IC, a conventional technique in which the hall sensor and the drive drive are separated may be used.

3 and 4, the upper case 54 of the magnetic material is formed with one or more cutouts 154, and a rib 155 protruding downward is formed at the center thereof. A cover bracket 72 of a nonmagnetic material is coupled to an upper portion of the upper case 54. As such, the structure of the upper case 54 of the magnetic material serves as a cogging torque generating unit, so that the upper case has functionality.

The shaft 62 has a lower portion mounted on the rib 152 of the lower case 52, and an upper portion mounted on the rib 55 of the upper case 54, and a washer on the upper portion of the rib 152. 64 and a bearing 66 on the washer 64 and a PEEK material on the bearing 66 to prevent thermal deformation and abrasion of the rib 155 due to high-speed long-term rotation of the bearing. A slide sheet 68 made of an engineering plastic material such as PET is mounted. The material of the washer 64 may also be made of an engineering plastic material such as PEEK material and PET.

6 and 7, on the outside of the bearing 66, an epoxy plate 82 is formed in which a hole 182 is formed in the center and the bearing 66 is press-fitted, and the epoxy plate 82 is multi-pole magnetized. The permanent magnet 88 and the weight storage unit 184 is mounted to the weight 78 causing the eccentric force on the outer side of the permanent magnet 88. The weight storage unit 184 is formed with a hole 183, the shape of the hole may be any shape, such as circular, square, arc.

8 and 9, as an example of the weight 78, an insertion portion 80 having a narrow width is formed at both ends of the main body, and a protrusion 79 is provided at the bottom. The protrusion 79 is inserted into the hole 183 of the weight storage unit 184. On the contrary, a hole may be formed in the bottom surface of the weight 78 and a projection may be inserted in the weight storage portion 184.

10 and 11, the weight 78 and the permanent magnet 88 are adhered to the epoxy plate 82.

12 and 13, an injection molding 190, such as polybuthylene terephthalate (PBT) or liquid crystal polimer (LCP), is injection molded and fixed to the weight 78 and the permanent magnet 88 on the epoxy plate 82. . This also fixes the bearing 66.

14 and 15, as another embodiment of the upper case 254, a nonmagnetic portion 258, which is an injection made of a nonmagnetic material, is injected into a magnetic portion 256 made of a magnetic material, and a shaft ( Ribs 260 are provided to support the top of 62.

16 and 17, as another embodiment of the upper case 354, one or more cutouts 358 are formed, and a central hole 362 is formed at the center thereof, and the magnetic part 356 is a magnetic material. It is composed. A cover bracket 372 of a nonmagnetic material is coupled to an upper portion of the upper case 354, and a rib 374 is provided at the cover bracket 372 to be inserted into the central hole 362 to insert the shaft 62. Support the top.

Referring to FIG. 18, as another example of the rotor structure, a soft magnetic or magnetic plate 400 is further included on the upper part of the permanent magnet 88 to be integrated by injection. This is to improve the magnetic force.

Referring to FIGS. 19 and 20, as another example of the rotor structure, the rotation center of the epoxy plate 82 is changed as compared with the rotor structures of FIGS. 12 and 13. As a result, the weight 78 is more eccentric to increase the amount of vibration. In the example of FIG. 18, the amount of vibration can be increased by changing the rotation center. This is applicable to both the above-described and later embodiments.

Next, another shape of the weight and thus the structure of the epoxy sheet is illustrated.

Referring to FIG. 21, the weight 578 has an insertion portion 580 having a narrow width at both ends of the body, and a bottom insertion portion 582 at the bottom thereof.

Referring to FIG. 22, an insertion groove 590 is formed in the weight storage portion 184 of the epoxy plate 82.

Therefore, the bottom insertion portion 582 of the weight is inserted into and fixed to the insertion groove 590 of the epoxy plate 82. Other than that is the same as the above-described embodiments, such as injection molding.

Referring to FIG. 23, the weight 578 ′ is formed with an insertion portion 580 having a narrow width at both ends of the main body, and a bottom insertion portion 582 ′ is provided on the bottom of the weight 578 ′ bordering one side of the bottom surface.

Referring to FIG. 24, an aperture 591 is formed in the weight storage portion 184 of the epoxy plate 82.

Therefore, the bottom insertion portion 582 of the weight is inserted into and fixed to the aperture 591 of the epoxy plate 82. Other than that is the same as the above-described embodiments, such as injection of the injection molding.

Referring to FIG. 25, the bottom surface inserting portion 682 having both sides rounded is provided on the bottom of one side of the bottom of the body 678.

Referring to FIG. 26, an aperture 591 ′ having both sides rounded is formed in the weight storage unit 184 of the epoxy plate 82.

Therefore, the bottom insertion part 682 of the weight is inserted into and fixed to the aperture 591 'of the epoxy plate 82. Other than that is the same as the above-described embodiments, such as injection of the injection molding.

Referring to FIG. 27, a bottom inserting portion 782 having two sides rounded at the bottom of the main body of the weight 778 is provided in the middle of the bottom.

Referring to FIG. 28, the insertion part 790 rounded at both sides is formed in the weight storage part 184 of the epoxy plate 82.

Therefore, the bottom insertion portion 782 of the weight is inserted into and fixed to the insertion portion 790 of the epoxy plate 82. Other than that is the same as the above-described embodiments, such as injection of the injection molding.

Referring to FIG. 29, the bottom surface of the body 878 has both sides rounded, and a bottom insertion portion 882 having a double length is provided.

Referring to FIG. 30, an insertion portion 890 having double lengths and rounded both sides is formed in the weight storage portion 184 of the epoxy sheet 82.

Therefore, the bottom insert 882 of the weight is inserted into and fixed to the insert 890 of the epoxy plate 82. Other than that is the same as the above-described embodiments, such as injection of the injection molding.

31 and 32, as another embodiment of the rotor, an epoxy plate 82 having an insertion groove 590 formed in the weight storage unit 184 shown in FIG. 22 may be applied, and the epoxy plate 82 may be used. With the upper portion as shown in Figure 27 and the lower portion of the weight 778 and the permanent magnet 88 on its inner surface, and injected into the injection molding 190 between the permanent magnet 88 and the bearing 66 is fixed do.

Referring to FIG. 33, as an example of various modifications of the embodiments of FIGS. 31 and 32, an aperture 591 ′ having both sides of the epoxy plate 82 formed on the weight storage unit 184 as shown in FIG. 26 is formed. And, the upper part is provided with a weight 678 as shown in Figure 25 and a permanent magnet 88 inside the weight 678, and between the wing permanent magnet 88 and the bearing 190 and the phase weight ( 678) is injected into the injection molding (190).

These embodiments of FIGS. 31, 32 and 33 indicate that the epoxy plate 82 may be located on top of the shaft 62 and weights and permanent magnets may be located thereunder, epoxy plate structure, weight structure, permanent Various embodiments, such as a magnet structure and an upper case structure, apply the above examples as they are.

In all the above embodiments, it is possible to use a soft magnetic metal plate as a substitute for the epoxy plate.

By the above configuration, the brushless type flat vibration motor according to the present invention functions to generate a cogging torque at the upper case side, and the permanent magnet 88 and the weight 78 to the upper side rather than the lower side of the epoxy plate 82. This is located. Since the cogging torque generating means is the upper case side, unlike the prior art, the yoke plate that is located on the upper side of the permanent magnet is not required. In some cases, a soft magnetic plate may be added to the upper surface of the magnet in consideration of magnetic properties.

Increasing the space utilization of the conventional brushless coin type vibration motor, and adding the function of generating cogging torque to the cover member to improve the starting point through initial position control, improve foreign material inflow, and when PCB bonding to the lower case bracket It eliminates the inconvenience of lifting and material selection, and increases the motor efficiency by constructing a closed unit of the magnetic circuit and reducing the unit cost as a one-piece that provides functionality to the cover bracket.

In the rotor manufactured by the conventional injection, it is not easy to fix the magnet and the weight, so that the magnet is bonded after the injection, thereby increasing the number of times and the amount of bond used. In the case of the rotor solidified by injection according to the present invention, since the magnet and the weight are first fixed to the injection mold by using an epoxy plate, it is easy to work during injection and the process is simplified and the durability of the rotor is improved, as well as space utilization. As the weight is increased, the size of the weight can be adjusted, and the effect of increasing the amount of vibration and cost is reduced.

What has been described above is just one embodiment for implementing the brushless type flat vibration motor according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the invention, anyone of ordinary skill in the art to which the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (39)

With the lower case, A flexible circuit board mounted on the lower case; An upper case set made of magnetic material and non-magnetic material for cogging torque generation function, A shaft mounted between the lower case and the upper case; Multi-pole magnetized permanent magnet, and the epoxy plate that is mounted on the upper portion of the weight causing the eccentric force on the outside of the permanent magnet is injected into the injection molding as a whole Brushless type flat vibration motor, characterized in that consisting of. The method of claim 1, Brushless type flat vibration motor, characterized in that the soft magnetic plate is attached on the permanent magnet. The method of claim 1, And a hole is formed in the weight storage portion of the weight, and a protrusion is formed in the bottom surface of the weight, and the protrusion of the weight is inserted into the hole of the weight storage portion and fixed to the brushless type vibration motor. The method of claim 1, And a protrusion is formed in the weight storage portion of the weight, and a groove is formed in the bottom surface of the weight, and the protrusion of the weight storage portion is inserted into and fixed to the groove of the weight. The method of claim 1, The upper case is a brushless type flat vibration motor, characterized in that at least one cut portion is formed. The method of claim 5, Brushless type flat vibration motor, characterized in that the cover bracket of the nonmagnetic material is covered on the upper case. The method of claim 6, Brushless type flat vibration motor, characterized in that the rib is provided in the center of the cover bracket. The method of claim 5, Brushless type flat vibration motor, characterized in that the injection portion is fixed to the cut portion. The method of claim 1, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion, the insertion groove is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted into the insertion groove of the epoxy plate material Brushless type flat vibration motor, characterized in that fixed. The method of claim 1, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion bordered on one side of the bottom surface, the aperture is formed in the weight storage portion of the epoxy plate, the bottom insertion portion of the weight is a Brushless type flat vibration motor, characterized in that is fixed to the inserted in the chur. The method of claim 1, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom side, the aperture is formed on both sides of the weight storage portion of the epoxy plate is formed, the bottom insertion portion of the weight is inserted into the aperture of the epoxy plate Brushless type flat vibration motor, characterized in that the fixed. The method of claim 1, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom surface, an insertion portion rounded on both sides is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted and fixed to the insert portion of the epoxy plate material Brushless type flat vibration motor, characterized in that. The method of claim 1, Both sides are rounded at the bottom of the main body of the weight, and a bottom insert having a double length is provided, and an insert portion having a double length and a rounded side is formed at the weight storage portion of the epoxy sheet, and the bottom insert of the weight is an epoxy sheet Brushless type flat vibration motor, characterized in that the insert is fixed to the insertion portion. With the lower case, A flexible circuit board mounted on the lower case; An upper case set made of magnetic material and non-magnetic material for cogging torque generation function, A shaft mounted between the lower case and the upper case; Epoxy sheet material that has a multi-pole magnetized permanent magnet and the weight causing the eccentric force on the outside of the permanent magnet is mounted on the top and injected as a whole, and mounted on the shaft to increase the eccentric force of the weight Brushless type flat vibration motor, characterized in that consisting of. The method of claim 14, Brushless type flat vibration motor, characterized in that the soft magnetic plate is attached on the permanent magnet. The method of claim 14, And a hole is formed in the weight storage portion of the weight, and a protrusion is formed in the bottom surface of the weight, and the protrusion of the weight is inserted into the hole of the weight storage portion and fixed to the brushless type vibration motor. The method of claim 14, And a protrusion is formed in the weight storage portion of the weight, and a groove is formed in the bottom surface of the weight, and the protrusion of the weight storage portion is inserted into and fixed to the groove of the weight. The method of claim 14, The upper case is a brushless type flat vibration motor, characterized in that at least one cut portion is formed. The method of claim 18, Brushless type flat vibration motor, characterized in that the cover bracket of the nonmagnetic material is covered on the upper case. The method of claim 19, Brushless type flat vibration motor, characterized in that the rib is provided in the center of the cover bracket. The method of claim 18, Brushless type flat vibration motor, characterized in that the injection portion is fixed to the cut portion. The method of claim 14, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion, the insertion groove is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted into the insertion groove of the epoxy plate material Brushless type flat vibration motor, characterized in that fixed. The method of claim 14, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion bordered on one side of the bottom surface, the aperture is formed in the weight storage portion of the epoxy plate, the bottom insertion portion of the weight is a Brushless type flat vibration motor, characterized in that the insertion is fixed to the chur. The method of claim 14, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom side, the aperture is formed on both sides of the weight storage portion of the epoxy plate is formed, the bottom insertion portion of the weight is inserted into the aperture of the epoxy plate Brushless type flat vibration motor, characterized in that the fixed. The method of claim 14, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom surface, an insertion portion rounded on both sides is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted and fixed to the insert portion of the epoxy plate material Brushless type flat vibration motor, characterized in that. The method of claim 14, Both sides are rounded at the bottom of the main body of the weight, and a bottom insert having a double length is provided, and an insert portion having a double length and a rounded side is formed at the weight storage portion of the epoxy sheet, and the bottom insert of the weight is an epoxy sheet Brushless type flat vibration motor, characterized in that the insert is fixed to the insertion portion. With the lower case, A flexible circuit board mounted on the lower case; An upper case set made of magnetic material and non-magnetic material for cogging torque generation function, A shaft mounted between the lower case and the upper case; Multi-pole magnetized permanent magnet, and an epoxy plate that is mounted on the lower portion of the permanent magnet and the weight causing the eccentric force is injected into the injection molding as a whole Brushless type flat vibration motor, characterized in that consisting of. The method of claim 27, Brushless type flat vibration motor, characterized in that the soft magnetic plate is attached on the permanent magnet. The method of claim 27, And a hole is formed in the weight storage portion of the weight, and a protrusion is formed in the bottom surface of the weight, and the protrusion of the weight is inserted into the hole of the weight storage portion and fixed to the brushless type vibration motor. The method of claim 27, And a protrusion is formed in the weight storage portion of the weight, and a groove is formed in the bottom surface of the weight, and the protrusion of the weight storage portion is inserted into and fixed to the groove of the weight. The method of claim 27, The upper case is a brushless type flat vibration motor, characterized in that at least one cut portion is formed. The method of claim 27, Brushless type flat vibration motor, characterized in that the cover bracket of the nonmagnetic material is covered on the upper case. The method of claim 27, Brushless type flat vibration motor, characterized in that the rib is provided in the center of the cover bracket. The method of claim 27, Brushless type flat vibration motor, characterized in that the injection portion is fixed to the cut portion. The method of claim 27, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion, the insertion groove is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted into the insertion groove of the epoxy plate material Brushless type flat vibration motor, characterized in that fixed. The method of claim 27, The weight is formed at both ends of the main body is a narrow insertion portion, the bottom surface is provided with a bottom insertion portion bordered on one side of the bottom surface, the aperture is formed in the weight storage portion of the epoxy plate, the bottom insertion portion of the weight is a Brushless type flat vibration motor, characterized in that the insertion is fixed to the chur. The method of claim 27, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom side, the aperture is formed on both sides of the weight storage portion of the epoxy plate is formed, the bottom insertion portion of the weight is inserted into the aperture of the epoxy plate Brushless type flat vibration motor, characterized in that the fixed. The method of claim 27, The bottom surface of the main body of the weight is provided with a bottom insertion portion rounded on both sides of the bottom surface, an insertion portion rounded on both sides is formed in the weight storage portion of the epoxy plate material, the bottom insertion portion of the weight is inserted and fixed to the insert portion of the epoxy plate material Brushless type flat vibration motor, characterized in that. The method of claim 27, Both sides are rounded at the bottom of the main body of the weight, and a bottom insert having a double length is provided, and an insert portion having a double length and a rounded side is formed at the weight storage portion of the epoxy sheet, and the bottom insert of the weight is an epoxy sheet Brushless type flat vibration motor, characterized in that the insert is fixed to the insertion portion.

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