KR20100050755A - Step vibration motor - Google Patents

Abstract

PURPOSE: By varying the number of rotation to the frequency the step vibrating motor obtains the fixed vibration amount through the wide section through the variable of the number of rotation. CONSTITUTION: The case(111) and base(115) are each other combined. One end section side and the other end part side of the supporting shaft(120) are respectively fixed to the case and base. Rotor is pivotally installed in the supporting shaft in order to generate vibration. Stators are installed for the case and rotor between and, the base and rotor.

Description

Step Vibration Motor {STEP VIBRATION MOTOR}

The present invention relates to a step vibration motor.

Today's communication devices have a built-in vibration motor that generates vibrations as incoming signals.

By the way, the general vibration motor controls the rotation speed by the strength of the current. Due to this, since the rotation speed can be changed only in a predetermined section, there is a disadvantage that a constant amount of vibration cannot be obtained.

In addition, there is a limitation in miniaturization and slimness in the structure that the weight is coupled to the installation structure or the support shaft of the rotor and stator disposed with a gap.

The present invention has been made to solve the above problems of the prior art, an object of the present invention to provide a step vibration motor that can obtain a constant amount of vibration in a wide range.

Another object of the present invention is to provide a step vibration motor capable of miniaturization and slimming.

Step vibration motor according to the present invention for achieving the above object, the case and the base coupled to each other; A support shaft having one end side and the other end side fixed to the case and the base, respectively; A rotor rotatably installed on the support shaft to generate vibration; And a stator disposed between the case and the rotor and between the base and the rotor to selectively rotate the rotor in the forward and reverse directions.

In addition, the step vibration motor according to the present invention for achieving the above object, the case and the base coupled to each other; A support shaft having one end side and the other end side fixed to the case and the base, respectively; A rotor having a ring-shaped magnet in which one end face and the other end face in the axial direction of the support shaft are magnetized and installed on the support shaft so as to be rotated forward and backward to generate vibration; And a stator disposed between the magnets and interacting with the magnet in the axial direction of the support shaft to selectively rotate the rotor in the forward and reverse directions.

Since the step vibration motor according to the present invention varies the rotation speed by the frequency, the rotation speed can be varied over a wide range, thereby obtaining a constant vibration amount.

In addition, one end face and the other end face of the magnet facing the axial direction of the support shaft are magnetized, and the stator is installed in a form of surrounding the magnet while facing one end face and the other end face of the magnet. Therefore, the structure is downsized and thinned.

Hereinafter, with reference to the accompanying drawings will be described in detail a step vibration motor according to an embodiment of the present invention.

1 is a perspective view of a step vibration motor according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line “A-A” of FIG.

As shown, a cylindrical housing 110 having a case 111 and a base 115 coupled to each other and positioned at upper and lower sides is provided.

Hereinafter, in referring to the direction and the surface of the other components including the base 115, the direction and the surface facing upwards in the vertical direction of the base 115 "upper and upper surface", the direction and the surface facing downward the "lower and If ".

The case 111 has a circular upper plate and a side plate extending downward from an edge portion of the upper plate, and the base 115 is formed in a disc shape and is coupled to an inner circumferential surface of the lower side of the side plate of the case 111. Accordingly, the upper plate and the base 115 of the case 111 form the upper and lower surfaces of the housing 110, respectively.

Coupling grooves 111a and caulking protrusions 115a that are coupled to each other are formed on the bottom surface of the side plate of the case 111 and the outer circumferential surface of the base 115. That is, when the caulking protrusion 115a is inserted into the coupling groove 111a and caulked, the case 111 and the base 115 are coupled to each other.

Support tubes 112 and 116 are formed on the center of the upper plate and the base 115 of the case 111 so as to face each other, and the upper and lower end sides of the support shaft 120 are inserted into and fixed to the support tubes 112 and 116, respectively.

The rotor 140 is installed on the outer circumferential surface of the support shaft 120 located inside the housing 110 to enable forward and reverse rotation. The rotor 140 generates vibration while rotating.

The rotor 140 has a ring-shaped magnet 141 and a weight 143 for generating vibration.

The weight 143 is formed in a substantially semi-circular shape is installed on the support shaft 120 so as to be forward and backward rotation. At this time, the weight 143 is eccentric with respect to the center of the support shaft 120, the inner peripheral surface of the magnet 141 is coupled to the outer peripheral surface. An arc-shaped auxiliary weight 145 may be further coupled to the outer circumferential surface of the magnet 141 to obtain a greater vibration force. The weight 143, the magnet 141 and the auxiliary weight 145 rotates integrally.

Washers 130 are respectively fixed to the upper and lower outer peripheral surfaces of the support shaft 120 to contact the upper and lower surfaces of the weight 143, respectively. The washer 130 prevents the rotor 140 from escaping above and below the support shaft 120.

The thickness of the weight 143 is formed thinner than the thickness of the magnet 141, the outer diameter of the washer 130 is formed smaller than the inner diameter of the magnet 141 is located inside the magnet 141. This is for thinning the axial thickness of the motor.

The magnet 141 is magnetized in the upper and lower surfaces of the support shaft 120 in the axial direction, and the upper and lower surfaces of the magnet 141 magnetized. The stator is installed to face the back surface.

The stator includes first and second stators between the upper plate of the case 111 and the upper surface of the magnet 141 and between the base 115 and the lower surface of the magnet 141. 160,170).

The first stator 160 is coupled to the first yoke 161 and the first yoke 161 that face the upper surface of the magnet 141, and the upper surface and the outer circumferential surface of the magnet 141. Has a second yoke 163, a first coil 165 and a first bobbin 167 disposed between the first yoke 161 and the second yoke 163, the second stator 170 having a magnet. A fourth yoke 173 coupled to the third yoke 171 and the third yoke 171 facing the bottom surface of the 141 and facing the bottom surface and the outer circumferential surface of the magnet 141. ), A second coil 175 and a second bobbin 177 provided between the third yoke 171 and the fourth yoke 173.

First, the first yoke 161, the second yoke 163, the first coil 165, and the first bobbin 167 of the first stator 160 will be described.

The first yoke 161 is formed in a ring shape, the first body 161a having an outer circumferential surface coupled to an inner circumferential surface on the upper plate side of the case 111, and an upper end of the first body 161a facing the upper plate of the case 111. It has a plurality of first tooth (161b) each bent to the center side of the first body (161a) on the surface.

The second yoke 163 has an outer diameter equal to the inner diameter of the first body 161a, and the inner diameter is formed in a ring shape smaller than the inner diameter of the first body 161a to be coupled to the lower inner peripheral surface of the first body 161a. End portions of the plurality of first extension pieces 163b and the first extension pieces 163b extending vertically from the inner circumferential surface of the second body 163a and the second body 163a to the upper plate side of the case 111 and having an equal interval therebetween. Have a second tooth 163c formed to be bent toward the center of the second body 163a, respectively.

When the first yoke 161 and the second yoke 163 are coupled, the first extension piece 163b is positioned between the first tooth 161b and the first tooth 161b which are adjacent to each other, and the second tooth ( 163c is disposed to be inserted between the first tooth 161b and the first tooth 161b which are adjacent to each other. In addition, when the first tooth 161b and the second tooth 163c are arranged to be inserted into each other, the side surfaces of the first tooth 161b facing each other and the side surfaces of the second tooth 163c are parallel to each other. The magnetic flux generated by the magnet 141 and introduced into the first tooth 161b or the second tooth 163c is transferred from the first tooth 161b to the second tooth 163c or the second tooth 163c. This is to make it flow uniformly when it flows into the 1st tooth 161b.

When the first yoke 161 and the second yoke 163 are coupled, the upper side of the magnet 141 is located inside the second body 163a and the first extension piece 163b so that the outer circumferential surface thereof is the second body 163a. ) And the first extension piece 163b. The top surface of the magnetized magnet 141 faces the first tooth 161b and the second tooth 163c.

The first coil 165 is wound in a space formed by an inner circumferential surface of the first body 161a, a lower surface of the first tooth 161b, an outer surface of the first extension piece 163b, and an upper surface of the second body 163a. It is installed and forms a ring shape. That is, the first coil 165 is disposed in the form of surrounding the upper outer peripheral surface of the first extension piece 163b and the magnet 141.

When the first yoke 161 and the second yoke 163 are coupled, the first tooth 161b and the second tooth 163c are positioned on the same plane and are directed toward the center of the first stator 160. An imaginary line connecting the end of the first tooth 161b and the end of the second tooth 163c is approximately circular. The upper side of the support shaft 120 passes through the end side spaces of the first tooth 161b and the second tooth 163c.

When the first yoke 161 and the second yoke 163 are coupled, the second tooth 163c is disposed between an end side of the first tooth 161b and the first tooth 161b toward the center of the first yoke 161. Is inserted. Therefore, a space exists between the first tooth 161b and the first extension piece 163b outside the second tooth 163c, and the first bobbin 167 is coupled to the space.

Next, the third yoke 171, the fourth yoke 173, the second coil 175, and the second bobbin 177 of the second stator 170 will be described.

The third yoke 171 is formed in a ring shape so that the outer peripheral surface is coupled to the inner peripheral surface of the side plate of the case 111 of the base 115 side, and the third body 171a facing the base 115. The lower surface has a plurality of third teeth 171b which are formed to be bent toward the center of the third body 171a, respectively.

The fourth yoke 173 has an outer diameter equal to the inner diameter of the third body 171a, and the inner diameter is formed in a ring shape smaller than the inner diameter of the third body 171a to be coupled to the upper inner circumferential surface of the third body 171a. Fourth body 173a extends from the inner circumferential surface of the fourth body 173a to the base 115 side and is formed at the ends of the plurality of second extension pieces 173b and the second extension piece 173b having equal intervals. Fourth body 173a has a fourth tooth 173c formed to be bent toward the center of the body.

When the third yoke 171 and the fourth yoke 173 are coupled, the second extension piece 173b is positioned between the third tooth 171b and the third tooth 171b which are adjacent to each other, and the fourth tooth ( 173c is disposed to be inserted between the third tooth 171b and the third tooth 171b which are adjacent to each other. In addition, when the third tooth 171b and the fourth tooth 173c are arranged to be inserted into each other, the side surfaces of the third tooth 171b facing each other and the side surfaces of the fourth tooth 173c are parallel to each other. The magnetic flux generated by the magnet 141 and introduced into the third tooth 171b or the fourth tooth 173c is transferred from the third tooth 171b to the fourth tooth 173c or the fourth tooth 173c. This is to make it flow uniformly when it flows into the 3rd tooth 171b.

When the third yoke 171 and the fourth yoke 173 are coupled, the lower side of the magnet 141 is positioned inside the fourth body 173a and the second extension piece 173b so that the outer circumferential surface thereof is the fourth body 173a. ) And the second extension piece 173b. The lower end surface of the magnetized magnet 141 faces the third tooth 171b and the fourth tooth 173c.

The second coil 175 is wound in a space formed by an inner circumferential surface of the third body 171a, an upper surface of the third tooth 171b, an outer surface of the second extension piece 173b, and a lower surface of the fourth body 173a. It is installed and forms a ring shape. That is, the second coil 175 is disposed in the form of surrounding the outer peripheral surface of the lower side of the second extension piece 173b and the magnet 141.

When the third yoke 171 and the fourth yoke 173 are coupled to each other, a virtual connection connecting an end of the third tooth 171b and an end of the fourth tooth 173c toward the center of the second stator 170 is performed. The line is substantially circular, and the lower side of the support shaft 120 passes through the end side spaces of the third tooth 171b and the fourth tooth 173c.

When the third yoke 171 and the fourth yoke 173 are coupled, the fourth tooth 173c is disposed between the third tooth 171b toward the center of the third yoke 171 and the end side of the third tooth 171b. ) Is inserted. Accordingly, a space exists between the third tooth 171b and the second extension piece 173b outside the fourth tooth 173c, and the second bobbin 177 is coupled to the space.

The second body 163a of the second yoke 163 of the assembled first stator 160 and the fourth body 173a of the fourth yoke 163 of the assembled second stator 170 are coupled to each other.

To this end, coupling holes 163aa and 173aa and coupling protrusions 163ab and 173ab are respectively formed in the second body 163a and the fourth body 173a, and the coupling protrusion 163ab of the second body 163a is formed. The coupling hole 173aa of the fourth body 173a is inserted and coupled, and the coupling protrusion 173ab of the fourth body 173a is inserted and coupled to the coupling hole 163aa of the second body 163a.

In the step vibration motor according to the present embodiment, the first stator 160 and the second stator 170 are provided in the same shape with the same configuration, and are arranged in a symmetrical form with respect to the height center of the magnet 141.

Since the step vibration motor according to the present embodiment varies the rotation speed with frequency, the rotation speed can be varied over a wide range, thereby obtaining a constant vibration amount. In addition, the upper and lower surfaces of the magnet 141 facing the axial direction of the support shaft 120 is magnetized, and the stator is in the form of wrapping the magnet 141 while facing the upper and other end surfaces of the magnet 141. Since it is provided, it can be miniaturized and thin.

The through plate 111b is formed in the side plate of the case 111, and one side portions 167a and 177a of the first and second bobbins 167 and 177 are exposed to the outside of the case 111 through the through holes 111b, respectively. do. In addition, terminals 169 and 179 are formed at one side portions 167a and 177a of the first and second bobbins 167 and 177, respectively, to protrude.

Lead wires of the first and second coils 165 and 175 are connected to the terminals 169 and 179, respectively, and an external power source is connected thereto. As a result, external power is transmitted to the first and second coils 165 and 175.

Thus, as the current is selectively supplied to the first coil 165 and the second coil 175, the magnet 141 rotates in the forward direction by the action of the first stator 160 and the magnet 141, 2, the magnet 141 rotates in the reverse direction by the action of the stator 170 and the magnet 141 to rotate the support shaft 120 in the forward and reverse directions.

Through-holes 167c and 177c are formed in the other side portions 167b and 177b of the first and second bobbins 167 and 177 positioned inside the case 111, respectively. And lead wires of the second coils 165 and 175, respectively. The through holes 167c and 177c support the lead wires of the first and second coils 165 and 175 so as to be stably connected to the terminals 169 and 179, respectively.

One side portions 167a and 177a of the first and second bobbins 167 and 177 are formed thicker than the other side portions 167b and 177b, respectively, and one side portions 167a and 177a and the other side of the first and second bobbins 167 and 177, respectively. The boundary portions of the portions 167b and 177b are inserted and placed in the settled grooves 161aa and 171aa respectively formed in the upper surface of the first body 161a and the lower surface of the second body 171a. Then, one side portions 167a and 177a of the first and second bobbins 167 and 177 are caught by the portions of the first and second bodies 161a and 171a forming the settling grooves 161aa and 171aa, respectively. And the second bobbins 167 and 177 are not separated into the case 111, respectively.

In addition, insertion grooves 167d (not shown) are formed at boundary portions of one side portions 167a and 177a of the first and second bobbins and the other side portions 167b and 177b, respectively, and the insertion grooves of the first bobbin 167. Portions of the first and second bodies 161a and 171a in contact with the settling grooves 161aa and 171aa are inserted into the insertion grooves of the 167d and the second bobbin 177, respectively. As a result, the first and second bobbins 167 and 177 are not separated into and out of the case 111, respectively.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Of course.

1 is a perspective view of a step vibration motor according to an embodiment of the present invention.

2 is an exploded perspective view of FIG.

3 is a cross-sectional view taken along the line “A-A” of FIG. 1.

Explanation of symbols on the main parts of the drawings

110 housing 120 support shaft

130: washer 140: rotor

160,170: first and second stator

Claims (21)

Mutually coupled case and base; A support shaft having one end side and the other end side fixed to the case and the base, respectively; A rotor rotatably installed on the support shaft to generate vibration; And a stator disposed between the case and the rotor and between the base and the rotor to selectively rotate the rotor in the forward and reverse directions. The method of claim 1, And said rotor has a magnet and a weight. The method of claim 2, The magnet is formed in a ring shape step vibration motor magnetized in one end surface and the other end surface facing the axial direction of the support shaft. The method of claim 3, wherein The weight is installed on the support shaft in a forward and reverse rotation to form an eccentricity with respect to the center of the support shaft, Step vibration motor coupled to the outer peripheral surface of the weight the inner peripheral surface of the magnet. The method of claim 4, wherein Step vibration motors each having a washer fixed to one side and the other side of the support shaft to prevent the rotor from being separated to one side and the other side of the support shaft. The method of claim 5, The thickness of the weight is formed thinner than the thickness of the magnet, The outer diameter of the washer is formed smaller than the inner diameter of the magnet and is located inside the magnet. The method of claim 4, wherein Step vibration motor further coupled to the auxiliary weight on the outer peripheral surface of the magnet. The method of claim 3, wherein The stator is provided between the case and one end surface of the magnet is installed between the first stator for rotating the rotor in the forward direction and the other end surface of the base and the magnet to rotate the rotor in the reverse direction Step vibration motor having a. The method of claim 8, And the first stator and the second stator are symmetrically disposed about the center of the magnet. The method of claim 9, The first stator has a first yoke, a second yoke coupled to the first yoke, a first coil installed between the first yoke and the second yoke, And said second stator has a third yoke, a fourth yoke coupled to said third yoke, and a coil provided between said third yoke and said fourth yoke, respectively. The method of claim 10, The first yoke is formed to be bent from the one end surface of the first body facing the case with the ring-shaped first body to the center side of the first body, respectively, to face one end surface of the magnet. With the first tooth, The second yoke is formed in a ring shape having an inner diameter smaller than that of the first body and is coupled to the other end surface side of the first body, and extends from the inner circumferential surface of the second body to the case side. A plurality of first extension pieces positioned between the first tooth and the first tooth that are spaced apart from each other, and are bent from the end of the first extension piece toward the center of the second body, respectively; A second tooth inserted between the first tooth and the first tooth, the second tooth facing one end surface of the magnet, The third yoke is formed to be bent from the one end surface of the third body facing the base with the ring-shaped third body toward the center of the third body to face the other end surface of the magnet. Take a third tooth, The fourth yoke is formed in a ring shape having an inner diameter smaller than that of the third body, the fourth yoke is coupled to the second end side of the third body, and is coupled to the second body and the fourth body. A plurality of second extension pieces extending from the inner circumferential surface of the body to the base side and spaced apart from each other and positioned between the third tooth and the third tooth adjacent to each other; from an end of the second extension piece toward the center of the fourth body; And a fourth tooth that is bent and formed between the third tooth and the third tooth, which are adjacent to each other, and have a fourth tooth opposite to the other end surface of the magnet. The method of claim 11, The second body and the fourth body are each formed with a coupling hole and the engaging projection, The coupling protrusion of the second body and the fourth body is inserted into the coupling hole of the fourth body and the second body, respectively, step vibration motor. The method of claim 11, The first coil is wound between the first body and the second body and the first extension piece, And the second coil is wound between the third body, the fourth body, and the second extension piece. The method of claim 13, When the first yoke and the second yoke are coupled to each other, the first stator is coupled to a space between the outside of the second tooth and the first tooth and the first body to connect an external power supply side and the first coil. With more first bobbin to connect, When the third yoke and the fourth yoke are coupled to each other, the second stator is coupled to a space between the third tooth and the third body outside the fourth tooth to connect an external power supply side and the second coil. A step vibration motor further having a second bobbin for connecting. The method of claim 14, One side of the first and second bobbin is exposed to the outside of the case through the through groove formed in one side of the side of the case, Step vibration motors are formed on one side of the first and second bobbin, the terminal is connected to the first and second coils, respectively, and at the same time the external power side is connected. The method of claim 15, And a through hole through which the lead wires of the first and second coils pass through the first and second bobbins, respectively. The method of claim 16, One side portion of the first and second bobbin is formed thicker than the other side portion located inside the case, And a settling groove formed in the first body and the second body, respectively, having a settling groove into which a boundary portion between one side and the other side of the first bobbin and a boundary portion between one side and the other side of the second bobbin are inserted. The method of claim 17, Insertion grooves are formed in the boundary portions of one side and the other side of the first bobbin and the boundary portions of one side and the other side of the second bobbin, respectively. And step portions of the first and second bobbin insertion grooves into which portions of the first and second bodies contacting the settling grooves are respectively inserted. The method of claim 1, And a support tube formed on the case and the base so as to face each other so that one end side and the other end side of the support shaft are inserted and fixed, respectively. The method of claim 1, Step vibration motor is formed in the case and the base coupling grooves and caulking projections respectively coupled to each other. Mutually coupled case and base; A support shaft having one end side and the other end side fixed to the case and the base, respectively; A rotor having a ring-shaped magnet in which one end face and the other end face in the axial direction of the support shaft are magnetized and installed on the support shaft so as to be rotated forward and backward to generate vibration; And a stator disposed with the magnet interposed therebetween, the stator for selectively rotating the rotor in the forward and reverse directions by interacting with the magnet in the axial direction of the support shaft.

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