KR200291011Y1 - Flat type vibration motor - Google Patents

Abstract

The present invention relates to a flat vibration motor to change the shape of the weight generating the vibration in the flat vibration motor as well as to prevent the departure of the weight even at high speed rotation and to obtain an excellent vibration force.

The present invention is a flat vibration motor including a case, a stator fixed inside the case, a rotor rotated by interaction with the stator and the rotor to rotate, the rotor is a rotor The body, a bearing mounted in the center of the rotor body, a plurality of coils disposed on the rotor body, and disposed between the coils, one side of the engaging portion is formed to fit the bearing and the other side is vibrated when the rotor is rotated The vibration generating unit is formed on the other side of the weight and the rotor body to be generated is composed of a commutator substrate for supplying power to the coil.

As described above, the flat vibration motor according to the present invention has a locking portion formed at one end of the weight, and the locking portion is installed to be fitted to the outer circumferential surface of the bearing, so that the vibration motor is rotated at a high speed for a long time or receives a predetermined shock from the outside. Problems such as the departure of the weight from the home position will be prevented in advance.

Description

Flat type vibration motor

The present invention relates to a flat vibration motor, and more particularly, by changing the shape of the weight generating vibration in the flat vibration motor, it is possible not only to prevent the weight from falling off at high speed but also to obtain an excellent vibration force. To a flat vibration motor.

In general, the flat vibration motor is configured to eccentrically rotate the center of the rotating rotor in one direction and to rotate the vibration to generate the vibration is generally used in small electronic products that require vibration.

For example, since a flat vibration motor can be compact, it is mainly installed in a mobile communication terminal, which has recently been miniaturized and thinned. In such a mobile communication terminal, a silent call means, which is a method of receiving means, is used. It is used.

At this time, one of the most important in the flat vibration motor used in this way is that the user of the mobile communication terminal to generate an excellent vibration force to accurately detect the generated vibration.

Accordingly, in the conventional flat vibration motor, a triangular or fan-shaped thin plate weight is attached to the commutator substrate on one side of the rotor, and then the insert is injected into an injection resin or the like, thereby rotating the rotor in one direction. It was configured to be eccentric.

However, in the conventional flat vibration motor as described above, the injection molding of the weight is performed in order to fix the weight firmly. When such injection molding is performed, a high cost injection mold or an injection molding machine is not only required, but also an injection molding process is required. There is a problem in that process defects such as molding defects, deformation due to injection resins, and disconnection defects occur.

In addition, when the weight is fixed to the rotor of the conventional flat vibration motor in this manner, and the vibration motor is driven, the weight that is rotated at high speed is only supported by the injection resin around the weight, and when it is rotated at a high speed for a long time or from an external shock When receiving and when the injection molding of the insert is made bad, there is a problem that the weight often does not overcome the centrifugal force generated during the high-speed rotation of the rotor is often separated from a fixed position.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to change the shape of the weight so that the weight of the rotor can be prevented from being separated even at high speeds, and a flat vibration motor can be obtained. In providing.

1 is a cross-sectional view showing a flat vibration motor as an embodiment of the present invention.

2 is a perspective view showing a rotor of the flat vibration motor shown in FIG.

3 is an exploded perspective view showing the rotor of the flat vibration motor shown in FIG.

Figure 4 is a perspective view of the rotor rotates 180 ° of the flat vibration motor shown in FIG.

Figure 5 is a perspective view showing a rotor of the flat type vibration motor of another embodiment of the present invention.

An embodiment of the present invention for realizing the above object is inserted into the case (Case), the stator is fixed to the inside of the case, the rotor is installed inside the case and rotated by the interaction of the stator and the rotor In the flat vibration motor including a rotating shaft for rotating the rotor, the rotor is a disk-shaped rotor body, a bearing mounted in the center of the rotor body and the rotating shaft is inserted, the rotor body A plurality of coils disposed on one surface of the coil and a weight disposed between the coils, on one side of which a hook part is fitted, which is fitted to a bearing, and on the other part, a vibration generating part for generating vibrations when the rotor is rotated. It is mounted on the other side of the body, characterized in that composed of a commutator substrate (Commutator) for supplying power to the coil.

Further, the locking portion is formed in a hollow cylindrical shape, the vibration generating portion is formed in a fan shape, characterized in that the locking portion and the vibration generating portion is formed integrally.

On the other hand, the present invention of another embodiment for realizing the object is inserted into the case, the stator is fixed to the inside of the case, the rotor is installed inside the case and rotated by interaction with the stator and the center of the rotor In the flat vibration motor including a rotating shaft that allows the rotor to rotate, the rotor is a circular plate-shaped commutator substrate, a bearing mounted in the center of the commutator substrate, the rotating shaft is inserted, the commutator substrate It is disposed between a plurality of coils and coils disposed on one surface, one side is characterized in that the engaging portion is formed in the weight portion formed on the other side is formed with a vibration generating portion to generate a vibration when the rotor is rotated.

Preferably, the locking portion is formed in a hollow cylindrical shape, the vibration generating portion is formed in a fan shape, characterized in that the locking portion and the vibration generating portion is formed integrally.

More preferably, the commutator substrate is formed of an iron substrate which is prevented from being deformed or warped so that flatness can be maintained.

Hereinafter, the flat vibration motor according to the present invention with reference to the drawings in detail.

First, referring to FIGS. 1 to 4, the flat vibration motor 100 which is an embodiment of the present invention will be described in detail. The flat vibration motor 100 which is an embodiment of the present invention is viewed as a main body as a main body. The case 110, the stator 130 fixed inside the case 110, and the rotor 150 installed inside the case 110 and rotated at a predetermined speed by interaction with the stator 130. And a rotating shaft 170 fitted in the center of the rotor 150 to allow the rotor 150 to be rotated.

More specifically, the case 110 is composed of a thin cylindrical case body 111 having one surface opened again, and a bracket 113 covering the one open surface of the case body 111. do.

Here, a first washer 112 is installed at the inner center of the case body 111 to slide one end of the rotation shaft 170 so that the rotation shaft 170 can be rotated smoothly. A second washer 115 is installed at the inner center of the bracket 113, which is a portion corresponding to 112, to slide the other end of the rotation shaft 170 so that the rotation shaft 170 can be smoothly rotated. At this time, the insertion hole 114 is formed in the inner center of the bracket 113, which is a portion in which the second washer 115 is installed, so that the rotation shaft 170 penetrating the second washer 115 can be fitted thereto.

On the other hand, the stator 130 is fixed to the inside of the case 110 serves to allow the rotor 150 to be rotated, giving a predetermined magnetic force to the coil 153 of the rotor 150 to be described later again A magnet (131) for rotating the rotor 150, and a brush base (133) for applying power to the commutator substrate 155 of the rotor 150 to be described later.

Here, the magnet 131 is installed along the edge of the bracket 113 on the upper surface of the bracket 113 which is a portion located inside the case 110 in a donut shape having a rectangular cross section. In addition, the brush base 133 is installed in the inner diameter portion of the magnet 131 of the upper surface of the bracket 113 in a thin plate shape.

At this time, the brush base 133 is provided with a brush 134 in contact with the rotating commutator substrate 155, the brush 134 is the brush base 133 and the commutator substrate 155 electrically It plays a role to make it energized.

On the other hand, the rotor 150 is installed inside the case 110, and the role of the rotor rotates interacting with the magnet 131 of the stator 130, and the rotor body 151 again serves as a body (Body) and The bearing is formed at the center of the rotor body 151 and formed so that the rotating shaft 170 is fitted on the inner circumferential surface, and the engaging portion 157 of the weight 154 to be described later is fitted on the outer circumferential surface. The coil 153 is mounted on one surface of the rotor body 151 and mutually interacts with the magnet 131 of the stator 130, and is mounted on one surface of the rotor body 151, and has a catch portion (one end). 157 is mounted on the outer circumferential surface of the bearing 152 to be mounted on the other surface of the weight 154 and the rotor body 151 so that the rotor 150 can be eccentric in one direction and the rotor 150 is It consists of a commutator substrate 155 for applying power to the coil 153 to be rotated.

Here, the rotor body 151 is injection-molded into a disc shape that can be installed inside the case 110, the one side portion is formed with a cutout 160 is installed the weight 154.

As described above, the bearing 152 is formed in a hollow cylindrical shape so that the locking portion 157 of the rotation shaft 170 and the weight 154 can be fitted to the inner circumferential surface and the outer circumferential surface, respectively, and the commutator substrate 155. And it is inserted into the center of the rotor body 151 insert injection molding and is formed of a metal (Metal) material.

In addition, the coil 153 is formed of a conductive material such as copper (Cu), and is wound a plurality of times in an equilateral triangle shape, and the rotor body is disposed three at about 120 ° intervals on one side of the commutator substrate 155. Insert injection molding is performed when the 151 is injection molded, and receives a power from the commutator substrate 155 to form a magnetic force that performs a predetermined magnetic action with the magnet 131 so that the rotor 150 can be rotated. Do it.

In addition, the commutator substrate 155 is mounted on the other surface of the rotor body 151 as described above in a thin circular plate shape having a diameter similar to that of the rotor body 151, and physically, the rotor body. Before the 151 is injection molded, the coil 153 and the weight 154 serve as a base to be attached and fixed in advance, and functionally generate a predetermined magnetic force by receiving power from the brush 134. It serves to apply power to the coil 153. At this time, the rotor body 151 is rotated by the mutual magnetic interaction between the coil 153 and the magnet 131, the commutator substrate 155 is a magnet 131 opposite the polarity formed in the coil 153 Power is applied to the coil 153 while alternating the power of the proper polarity at predetermined intervals so as to correspond to the polarity of.

Finally, as described above, the weight 154 is fitted to the outer circumferential surface of the bearing 152 mounted at the center of the rotor body 151 and is formed on one side of the rotor body 151. Bar is installed in the cutout 160 of the), the engaging portion 157 is fitted to the outer circumferential surface of the bearing 152, and the vibration generating unit 158 is installed in the cutout 160 of the rotor body 151 It is divided into and formed integrally, and formed of a metal material having a high specific gravity.

Here, the locking portion 157 is a hollow cylindrical shape in which the bearing 152 is fitted on the inner circumferential surface, and supports the rotor 150 when the rotor 150 is rotated so that the rotor 150 is separated from the outside. To prevent it from happening. In addition, the vibration generating unit 158 serves to cause the vibration to be generated when the rotor 150 is rotated by eccentric the rotor 150 in a fan shape. At this time, the vibration generating unit 158 is a fan-shaped bar, the sharp point where the radius of both sides is referred to as a vertex and the opposite part to the arc (弧), the vertex portion of the vibration generating unit 158 is the rotor body The arc portion of the vibration generating unit 158 toward the center of the 151 is preferably installed to face the edge portion of the rotor body 151, which increases the degree of eccentricity of the rotor 150 to the rotor ( 150 to obtain a better vibration force.

In the above description, reference numeral 156 denotes a communicator 156 formed on the communicator substrate 155 to electrically conduct the brush 134 and the coil 153. The reference numeral 190 denotes a communicator substrate ( It refers to the three coil arrangement holes 190 formed so that the three coils 153 can be disposed in the 155, reference numeral 159 is formed in the engaging portion 157 of the weight 154 and the bearing 152 is It refers to the engaging hole 159 is fitted.

Hereinafter, a flat vibration motor of another embodiment of the present invention will be described in detail. At this time, the flat vibration motor, which is another embodiment of the present invention, is most similar to the flat vibration motor 100 of the embodiment described with reference to FIGS. 1 to 4, and only the rotor is different, and will be described below with reference to FIG. 5. Only the rotor 250 of the flat vibration motor, which is another embodiment of the design, will be described in detail.

The rotor 250 of the flat vibration motor, which is another embodiment of the present invention, has a commutator substrate 255 serving as a base substrate as a whole, and is mounted at the center of the commutator substrate 255 and a rotation shaft 270 is provided on an inner circumferential surface thereof. The bearing 252 is formed to be fitted and formed on the outer circumferential surface so that the locking portion 257 of the weight 254 to be described later is fitted, and is mounted on one surface of the communicator substrate 255 and mutually interacts with a magnet of a stator (not shown). It is mounted on one surface of the coil 253 and the commutator substrate 255 which acts magnetically, and the engaging portion 257, which is one end thereof, is mounted to fit on the outer circumferential surface of the bearing 252 so that the rotor 250 is eccentric in one direction. It is composed of a weight 254 to be able to be.

Here, the commutator substrate 255 has a thin circular plate shape, and as described above, serves as a base substrate for adhering and fixing the coil and the weight, so that the steel is less deformed without being easily deformed or distorted. It is formed of a metal (Metal) material such as a substrate, and is applied to the coil 253 to receive a power from a brush (not shown) to form a predetermined magnetic force. In this case, when the commutator substrate 255 is formed of a metal material such as an iron substrate, the deformation thereof may be prevented and the flatness may be continuously maintained.

As described above, the bearing 252 is formed in a hollow cylindrical shape so that the locking portion 257 of the rotation shaft 270 and the weight 254 can be fitted to the inner circumferential surface and the outer circumferential surface, respectively, and the commutator substrate 255. Press-fitted in the center of the fixed and formed of a metal material.

In addition, the coils 253 are formed of a material such as copper (Cu), which is a conductive material, and are wound three times in an equilateral triangle shape, and three coils 253 are disposed on one surface of the communicator substrate 255 at intervals of about 120 °. It is firmly fixed to the data substrate 255 and serves to form a magnetic force that performs a predetermined magnetic action with the magnet 231 so that the rotor 250 can be rotated by receiving power from the commutator substrate 255.

Meanwhile, as described above, the weight 154 is fitted to one surface of the communicator substrate 255 while being fitted to the outer circumferential surface of the bearing 252 mounted at the center of the communicator substrate 255. It is divided into the engaging portion 257 to be fitted to the outer peripheral surface of the vibration generating unit 258 mounted on one surface of the commutator substrate 255 is formed integrally, is formed of a high specific gravity metal material.

At this time, the locking portion 257 is a hollow cylindrical shape in which the bearing 252 is fitted to the inner circumferential surface, is pressed and fixed to the outer circumferential surface of the bearing 252, the rotor 250 is rotated when the rotor 250 is rotated By supporting it, the rotor 250 is prevented from coming off. In addition, the vibration generating unit 258 is adhered to an adhesive or the like in a fan shape and firmly fixed to the commutator substrate 255, and vibrates when the rotor 250 is rotated by causing the rotor 250 to be eccentric in one direction. It plays a role in making this happen. Here, the vibration generating unit 258 is a fan-shaped bar, a sharp point where the radii of both sides is called a vertex, and a portion opposite to this is called an arc, the vertex portion of the vibration generating unit 258 is a commutator The arc portion of the vibration generating unit 258 toward the center of the substrate 255 is preferably installed to face the edge portion of the commutator substrate 255.

In the above description, reference numeral 290 denotes three coil arrangement holes 290 formed so that three coils 253 may be disposed on the communicator substrate 255.

Hereinafter, the coupling method of the flat vibration motor according to the present invention and its operation and effects will be described in detail with the flat vibration motor 100 as an embodiment of the present invention shown in FIGS. 1 to 4 as a preferred embodiment. Same as

First, a method of assembling and forming the rotor 150 will be described. An operator may include a commutator substrate 155, and then insert a bearing 152 in the center of the commutator substrate 155, and the bearing 152. After inserting), three coils 153 are attached to the coil arrangement hole 190 formed in the commutator substrate 155, and one of the three coils 153 attached therebetween is adjacent to the coil adjacent thereto. The weight 154 is installed.

At this time, the weight 154 is installed so that the locking portion 157 of the weight 154 is fitted to the outer circumferential surface of the bearing 152.

Subsequently, when attachment and fixing of the coil 153 and the weight 154 and the like to the communicator substrate 155 are completed, the worker may injection molding the rotor body 151. At this time, the coil 153 and the weight 154 and the bearing 152 are injection molded into the rotor body 151 to be formed integrally with the rotor body 151, the assembly and molding of the rotor 150 Is done.

Then, when assembly and molding of the rotor 150 is completed, the operator inserts the rotary shaft 170 in the bearing 152 of the rotor 150 and then couples the rotor 150 to the case 110. .

That is, the worker is provided with a bracket 113 on which the magnet 131, the brush base 133, and the brush 134 are mounted, and then the bearing of the rotor body 151 in the insertion hole 114 of the bracket 113. One end of the rotation shaft 170 penetrating 152 is inserted.

At this time, the coil 153, the weight 154 and the commutator substrate 155, etc. are integrally mounted to the rotor body 151, and the user rotates when the rotor 150 is coupled to the bracket 113. The commutator substrate 155 of the electron 150 is opposed to the brush 134 of the bracket 113, and then the rotor 150 is coupled to the bracket 113.

Thereafter, when the coupling of the rotor 150 to the bracket 113 is completed, the case body 111 is coupled to the bracket 113 and the coupling of the present invention flat vibration motor 100 is completed.

Here, when a predetermined external power is applied to the brush base 133, the power applied to the brush base 133 is a commutator of the commutator substrate 155 along the brush 134 connected to the brush base 133. 156 is applied to the coil 153 connected to the commutator 156 thereafter.

Therefore, a predetermined magnetic force is generated in the coil 153 to which power is applied, and the magnetic force interacts with the magnet 131 of the bracket 113, and the rotor 150 rotates by this magnetic action. Will be.

At this time, the rotor 150 is eccentric by the weight 154, the rotor 150 is vibrated while rotating.

As described above, the flat vibration motor according to the present invention has a locking portion formed at one end of the weight, and the locking portion is installed so as to be fitted to the outer circumferential surface of the bearing, even when the vibration motor is rotated at a high speed for a long time or receives a predetermined shock from the outside. Problems such as the weight deviating from the position are prevented in advance.

In addition, in the case of the flat vibration motor, which is another embodiment of the present invention, the weight and coil of the rotor are not fixed by insert injection molding such as injection resin such as the rotor body. Since it is fixed as a high-cost injection mold or injection machine is not necessary, molding defects that may occur during the injection process, deformation by the injection resin, disconnection defects, etc. are not generated at all.

In addition, in the case of the flat vibration motor according to another embodiment of the present invention, since the commutator substrate to which the weight and the coil are fixed is formed of a metal material such as a very hard steel plate, the injection molding method of the injection resin such as the rotor body does not need to be used. It will not be warped or deformed.

As described above, the flat vibration motor according to the present invention is provided with a locking portion formed at one end of the weight, and the locking portion is installed to be fitted to the outer circumferential surface of the bearing, so that the vibration motor may receive a predetermined shock from a high-speed rotation for a long time or from the outside. Even in such a case, there is an effect that a problem such as the weight deviating from the correct position is prevented in advance.

In addition, in the case of the flat vibration motor, which is another embodiment of the present invention, the weight and the coil of the rotor are not fixed by the insert injection molding method such as injection resin, but are simply fixed by the method of injection molding and bonding. Not only is there no need for an injection molding machine, but there is an effect that no problems such as molding defects, deformation due to injection resins, disconnection defects, etc. may occur at all during the injection process.

In addition, in the case of the flat vibration motor according to another embodiment of the present invention, since the commutator substrate to which the weight and the coil are fixed is formed of a metal material such as a steel plate having a very hard and low deformation, the insert injection molding method of the injection resin such as the rotor body Even if you do not use the effect is not twisted or deformed.

Claims (5)

A case, a stator fixed inside the case, a rotor installed inside the case, the rotor being rotated by interaction with the stator, and a rotating shaft fitted in the center of the rotor to allow the rotor to rotate. In the flat vibration motor, the rotor A disk-shaped rotor body; A bearing mounted at the center of the rotor body and into which the rotating shaft is inserted; A plurality of coils disposed on one surface of the rotor body; A weight disposed between the coils, one side having a locking portion fitted to the bearing, and the other side having a vibration generation portion for generating vibration when the rotor is rotated; Flat vibration motor is mounted on the other side of the rotor body, consisting of a commutator substrate for supplying power to the coil. The flat vibration motor of claim 1, wherein the locking part is formed in a hollow cylindrical shape, the vibration generating part is formed in a fan shape, and the locking part and the vibration generating part are integrally formed. A case, a stator fixed inside the case, a rotor installed inside the case, the rotor being rotated by interaction with the stator, and a rotating shaft fitted in the center of the rotor to allow the rotor to rotate. In the flat vibration motor, the rotor A commutator substrate having a circular plate shape; A bearing mounted at the center of the commutator substrate and having the rotation shaft inserted therein; A plurality of coils disposed on one surface of the commutator substrate; Is disposed between the coil, the one side portion is formed in the engaging portion is fitted to the bearing, the other side is a flat vibration motor, characterized in that consisting of a weight formed vibration generating portion for generating a vibration when the rotor is rotated. The flat vibration motor of claim 3, wherein the locking portion is formed in a hollow cylindrical shape, the vibration generating portion is formed in a fan shape, and the locking portion and the vibration generating portion are integrally formed. 4. The flat vibration motor of claim 3, wherein the commutator substrate is formed of an iron substrate which is prevented from being deformed or warped so that flatness can be maintained.