KR101265775B1 - Linear Vibrator and Manufacturing of Thereof - Google Patents

Abstract

The present invention relates to a vibration generator used in a device such as a mobile phone that requires vibration, and more particularly, the vibration portion and the case including an open case and a weight installed inside the case in more detail It is configured to include a spring fixed to the inside to obtain a horizontal vibration by using a resonance phenomenon generated by having an electromagnetic force of the same frequency as the natural frequency of the spring, the life of the mechanical vibration in the conventional mechanical vibration generator The present invention relates to a horizontal vibration type vibration generator and a method of manufacturing the same, which improve the problem of shortening and have a thin structure that could not be achieved in the vertical movement type vibration generator, and which have a large vibration force.

Description

Vibration generator and manufacturing method {Linear Vibrator and Manufacturing of Thereof}

The present invention relates to a vibration generator for use in devices such as mobile phones that require vibration, and more particularly, a vibration unit including a case having an open side and a weight installed inside the case and fixedly installed in the case. It is composed of a spring and the like to obtain a horizontal vibration by using the resonance phenomenon generated by having an electromagnetic force of the same frequency as the natural frequency of the spring, the problem of shortening the life due to mechanical friction in the conventional mechanical vibration generator The present invention relates to a horizontal vibration type vibration generator having a high vibration force while having a thin structure which could not be achieved in a vertical moving type vibration generator and a manufacturing method thereof.

Vibration generators used in devices such as mobile phones that require conventional vibration are vibration motors in which an eccentric or eccentric weight is mounted on a brush DC motor or BLDC vibrations in which an eccentric weight is mounted on a rotating body. There was a motor, a coin-type vibration motor, or a vertical vibration motor using resonance, but the vibration generators were insufficient to satisfy all conditions such as long life, reliability, thinning, and high vibration amount required by devices such as mobile phones.

For example, a vibration generator using the brush DC motor generates mechanical friction, electrical sparks and abrasion as the brush passes through the gap between the segment of the commutator and another segment, thereby generating foreign matter, thereby extending the life of the vibration generator. There was a problem shortening.

In addition, the vertical vibration motor that moves up and down by using the resonance is a moving assembly including a spring and weight as in Korea Patent Publication No. 2005-5596 to solve the problem of the vibration generator using the brush DC motor However, due to the interaction between electromagnetic force and magnetic field, it was possible to obtain resonant vibration by using electromagnetic force, but because it is a mechanism of moving up and down using elastic body, it requires minimal mechanical space to move up and down due to its structure. There was a mechanical problem that cannot reduce the height of the overall vibration generator.

The present invention has been made to solve the problems of the prior art as described above, the present invention includes a vibration unit including a case having one side is opened and a weight installed inside the case and a spring fixed to the inside of the case, etc. It is configured to obtain a horizontal vibration by using the resonance phenomenon generated by the electromagnetic force of the same frequency as the natural frequency of the spring to improve the problem of shortening the life due to mechanical friction in the conventional mechanical vibration generator, vertical movement type It is an object of the present invention to provide a horizontal vibration type vibration generator having a thin structure that has not been achieved in the vibration generator but having a large vibration force.

In addition, the present invention is to provide a vibration generator manufacturing method that can reduce the assembly tolerance between the assembly parts and improve the assembly performance in manufacturing the horizontal vibration type vibration generator as described above to improve the reliability of the product and reduce the manufacturing cost. have.

Vibration generator according to the present invention for achieving the above object is fixed to the inside of the case, one side is open and the outer periphery or the case formed in the outer periphery, the vibration portion including a weight installed inside the case A magnetic field generating unit including a spring installed, a magnet providing electromagnetic force so that the vibrating unit vibrates horizontally, and an air core coil installed at a predetermined gap with the magnet, and a portion formed at an outer periphery to close the opening surface of the case. Or it is characterized in that the concave portion is formed and comprises a base that is assembled and assembled with the case.

In addition, the present invention is characterized in that the vibration unit is composed of a bracket that provides a space inside the case and the weight is installed inside the bracket.

In addition, the present invention is characterized in that one end is coupled to the case and the other end is fixedly coupled to the weight while the spring wraps the weight in the '' 'shape.

In addition, the present invention is the air core coil is formed in the inner space and the inner space The core may be installed or omitted.

In addition, the present invention is composed of a first weight having a groove and a second weight having a through portion, wherein the magnet is placed in the groove of the first weight through the metal yoke to insert the through portion of the second weight It is characterized by.

In the present invention, the magnetic field generating unit is installed on the base, the magnetic field generating unit is installed on the base, the FPC (Flexible Printed Circuit) with a circuit pattern is installed on the upper surface of the base and the core core is installed on the upper surface of the FPC It is characterized by.

In addition, the present invention is characterized in that by forming a plurality of positioning holes in the case and the bracket to easily check the installation position of the bracket when the bracket is installed in the case.

In addition, the present invention is characterized in that the core installed in the inner space of the air core coil has a height equal to or higher than the height of the air core coil.

In addition, the present invention is characterized in that the core installed in the inner space of the air core coil has a height equal to or higher than the height of the air core coil.

In addition, the present invention is characterized in that the cross section of the air core coil has a circular or rectangular shape.

In addition, the present invention is characterized in that the magnet is an Nd-Fe-B sintered magnet, and the magnet is magnetized in two poles (N pole and S pole) in the left and right directions.

In addition, the present invention is characterized in that the half blanking (Half Blanking) is formed on the base and the FPC is installed on the Half Blanking (Half Blanking).

In addition, the present invention is characterized in that the base forms a plurality of circular protrusions around the half blanking portion.

In addition, the present invention is characterized in that a plurality of convex portions or concave portions are formed on the outer periphery of the case, and the concave portion or the concave portion is formed on the outer periphery of the base so that the case and the base are assembled with each other.

In addition, the present invention is characterized in that the weight is one weight having a penetrating portion, and the magnet and the yoke are inserted into the penetrating portion.

In addition, the present invention is characterized in that the yoke can be omitted when the bracket is a magnetic material.

On the other hand, the vibration generator manufacturing method according to the present invention and the case is open on one surface; A vibrator including a weight installed inside the case; A spring fixedly installed in the case; A magnetic field generating unit including a magnet providing electromagnetic force to vibrate the vibrating unit horizontally, an air core coil and a flexible printed circuit (FPC) installed at a predetermined gap with the magnet; A method of manufacturing a vibration generator comprising: a base for inserting a magnet into the weight, fixedly coupling the weight to the spring, and fixing the spring to the case. A second assembly step of assembling and installing the FPC and the air core coil on the base in a separate process from the first assembly step and the first assembly step, an assembly assembled in the first assembly step and an assembly assembled in the second assembly step Through the third assembly process of assembling the vibration generator is characterized in that to complete.

In addition, the vibration generator manufacturing method of the present invention is a first assembly process is the step of inserting the magnet inside the weight, a bond injection step for fixing the magnet and the weight, and injected to fix the magnet and the weight Hardening a bond, welding fixing the spring to the weight, and welding the spring to the case.

In addition, the vibration generator manufacturing method of the present invention is the second assembly step of assembling and installing the FPC and the air core coil on the base, the step of seating the positioning pin of the base and the center pin of the base assembly tool, and the FPC Matching and positioning the positioning hole of the base assembly tool and the center pin of the base assembly tool; and mounting and positioning the positioning hole of the core assembly tool and the center pin of the base assembly tool; It characterized in that it consists of a step of fixing.

In addition, the vibration generator manufacturing method of the present invention is characterized in that it comprises a step of fixing the core to the inner space of the air core coil after fixing the FPC and the air core coil on the base.

In addition, the vibration generator manufacturing method of the present invention is a step of assembling the assembly assembled in the first assembly step and the assembly in the second assembly step in the third assembly step, a plurality of convex parts or the outer periphery of the case; It is characterized in that the convex portion is formed and the outer periphery of the base forms the concave portion or the concave portion so that the case and the base are engaged with each other and assembled.

Vibration generator according to the present invention is configured to include a vibration unit including a case having one side is opened and the weight installed inside the case and a spring fixed to the inside of the case, the electromagnetic force of the same frequency as the natural frequency of the spring By obtaining the horizontal vibration by using the resonance phenomenon generated by having a, it is possible to improve the life of the vibration generator and to implement a vibration generator having a high vibration force while having a thin structure.

In addition, the vibration generator manufacturing method according to the present invention has the effect of reducing the assembly tolerance between the assembly parts and improves the assembly properties to improve the reliability of the product and reduce the manufacturing cost.

1 is an exploded perspective view of a vibration generator according to the present invention
2 is a cross-sectional view of a vibration generator according to the present invention
Figure 3 is an assembled perspective view of the vibration portion in the vibration generator according to the present invention
Figure 4 is a detailed view of the base portion in the vibration generator according to the present invention
Figure 5 is a detailed view of the assembly protrusion of the case and the cover in the vibration generator according to the invention
6 is a coupling detail of the base portion in the vibration generator according to the invention
7 is an exploded perspective view of another embodiment of a vibration generator according to the present invention
8 is a cross-sectional view of another embodiment of a vibration generator according to the present invention.
Figure 9 is a flow chart for one embodiment of the manufacturing process of the vibration generator according to the present invention
10 is a flow chart of another embodiment of the first manufacturing process in the manufacturing process of the vibration generator according to the present invention

Hereinafter, the vibration generator according to the present invention and a method for manufacturing the same will be described in detail with reference to the accompanying drawings.

As an example, the vibration generator according to the present invention has a case in which a space is formed in a rectangular cylinder shape in which four sidewalls and one side are opened and the other side is closed, as shown in FIGS. 1 and 2. 10) and a bracket 20 and the bracket 20 which stand on four sides of the bottom surface and the bottom surface of the quadrangular shape and have a width of a predetermined size and are disposed inside the case to provide a space. Vibration portion consisting of weights (21, 22) are installed in the interior of the 'c' shaped spring 23 is fixed to the case 10 and the bracket 20 while surrounding the bracket 20, The vibration unit is composed of a magnetic field generating unit including a magnet 30 for providing an electromagnetic force so as to vibrate horizontally and an air core coil 40 provided with a predetermined gap with the magnet 30.

As another example, the vibration generator according to the present invention omits the bracket 20, as shown in FIGS. 7 and 8, so that the spring 23 is not installed inside the case 10. 21 and 22 are wrapped in a 'c' shape, and one end thereof is fixedly installed with the case, and the other end thereof is directly fixed to and coupled to the weights 21 and 22 to support the weights 21 and 22. have.

The weight is composed of a first weight 21 having a groove and a second weight 22 having a through portion, and the magnet 30 is formed in the groove of the first weight 21 via a metal yoke 31. It is structured to insert the through portion of the second weight 22 while being settled.

The yoke 31 is attached to one surface of the magnet 30 to serve as a line when the magnetic force line generated at the N pole of the magnet 30 enters the S pole, and as described above, the yoke 31 of the magnet 30 By attaching the yoke 31 to only one surface, the other surface to which the yoke 31 is not attached increases magnetic force and the magnetic field generated by the air core coil 40 and the yoke 31 are not attached. It encounters a magnetic field generated on the other side of the magnet 30 is able to generate a greater force.

The weights 21 and 22 have a predetermined weight, and for convenience of manufacture, as shown in FIGS. 1 to 3, the first weights 21 and the second weights 22 are preferably configured in two, The yoke 31 and the magnet 30 can be settled as one weight.

As one embodiment, the spring 23 is fixed to one surface of the case 10 while wrapping the weights 21 and 22 in an approximately 'C' shape as shown in FIG. 5. The other end may be fixed to one surface of the bracket 20, and as another embodiment, as shown in FIG. 8, one end of the bracket 10 is fixedly installed on one surface of the case 10 and the other end is directly fixed to the weight. Can be combined.

The magnetic body 30 installed in the inner space of the bracket 20 or inserted into the inner space of the weights 21 and 22 and the weights 21 and 22 directly fixedly coupled to the spring 23 is the magnetic field. When the spring 23 is moved left and right by the magnetic force generated from the generator is also elastically moved to the left and right. When the weights 21 and 22 are installed in the inner space of the bracket 20, the bracket 20 is moved left and right, and the spring 23 having the other end fixed to the bracket 20 also has elasticity. It will move from side to side.

The magnet 30 is an Nd-Fe-B sintered magnet, and two poles (N pole and S pole) are magnetized in the left and right directions of the magnet.

An FPC (Flexible Printed Circuit) 41 having a circuit pattern is installed on an upper surface of the base 50 (a surface facing the inside of the case when assembled), and the core 42 is provided on an upper surface of the FPC 41. Alternatively, an air core coil 40 in which the core 42 is omitted is installed.

An internal space is formed in the air core coil 40, and the core 42 may be installed or omitted in the internal space.

The core installed in the inner space of the air core coil 40 is made of metal having a high permeability and has a height equal to or higher than that of the air core coil. Using a high permeability core as described above has the advantage of reducing the leakage magnetic field.

The air core coil 40 is wound by a self bonding wire, and its cross section has a circular or rectangular shape.

The vibration generator according to the present invention wraps the case 10 and the bracket 20 while surrounding the bracket 20 and the vibration portion composed of weights 21 and 22 installed inside the bracket 20 as one embodiment. It is composed of a 'c'-shaped spring (23) fixedly installed in the) and the magnet 30 is accommodated in the inner space of the weight (21, 22), the magnet 30 is the' c 'shaped spring is in by 23 can not be moved up and down the structure, and a by omitting the bracket 20 as an alternative embodiment the spring 23, the said weight (21) and (22) One end is fixed to the case 10 while being wrapped and the other end is fixed and directly coupled to the weights 21 and 22, and the magnet 30 is accommodated in the inner space of the weights 21 and 22. Magnet 30 may be a structure that can not move up and down by the '23'-shaped spring (23).

In the above-described structures, the vibrating unit moves from side to side and vibrates as follows.

When an external power source is applied through the FPC 41, a current flows through the air core coil 40, and a magnetic field is formed around the air core coil 40, and the core 42 is formed on the air core coil 40. When is installed, the magnetic field generated according to the right screw law is focused on the core 42 having a high permeability.

The magnet 30 is formed by magnetizing the N pole and the S pole in the left and right directions, and the magnetic field generated around the magnet 30 and the magnetic field formed around the air core coil 40 or the core 42 when the core 42 is installed. The magnetic field focused at (42) interacts according to the law of Lorentz's force, and the magnet 30 cannot move up and down by the '23'-shaped spring 23, so the magnet 30 Is moved to the left and right, and the weights 21 and 22 to which the magnet 30 is fixed are also moved to the left and right.

At this time, if the frequency of the power applied to the air core coil 40 via the FPC 41 is the same as the natural frequency of the spring 23, a resonance phenomenon occurs in which the vibration increases rapidly, thereby obtaining maximum vibration. .

The resonance frequency for generating resonance at the frequency of the applied power can be obtained as follows.

Resonance Frequency = 1 / 2π √ (k / m)

Where k = spring constant and m = weight weight

The resonance frequency may be changed by changing the constant of the spring 23 and the weights of the weights 21 and 22 in accordance with the frequency to be used in the design. The resonant frequency may vary from designer to designer.

Vibration generator according to the present invention by using the above-described resonance phenomenon by inserting a metal core 42 having a high permeability into the air core coil 40 to attenuate the leakage of the magnetic field, and the N pole and S pole in the left and right directions When the magnet 30 magnet is spaced apart from the core coil 40 by a predetermined distance, and an external power is applied through the FPC 41, a current flows in the core coil 40 so that the core coil 40 A magnetic field is formed around the magnet 30 to move left and right, and thus the weights 21 and 22 are also moved left and right and fixed to the bracket 20 and the bracket for receiving the weights 21 and 22. The spring 23 is also moved to the left and right, by using the resonance phenomenon of the spring 23, to solve the mechanical problem that was required during the vertical movement in the conventional vertical movement vibration generator It is possible to realize a vibration generator with a low thickness and a large vibration force.

In addition, if the directions of the air core coil 40 and the magnet 30 are partially adjusted, the direction of the magnetic field formed in each of them may be changed to generate a resonance phenomenon at a frequency of a specific band.

In the vibration generator according to the present invention, one end of the spring 23 is fixedly installed on the case 10, and the other end of the spring 23 is fixedly installed on the bracket 20, and in the internal space of the bracket 20. It is assembled by placing the first weight 21 and the second weight 22 and the yoke 31 and the magnet 30 in the inner space of the first weight 21 and the second weight 22. The first assembly and the second assembly are used as a second assembly, wherein the air core coil 40 in which the FPC 41 and the core 42 are fixed to the base 50 is fixedly installed. Once assembled, it is completed.

That is, as shown in FIG. 5, a plurality of assembling grooves (11 parts) are formed at the outer circumference of the open surface of the case 10, and an assembling protrusion (凸 part) is formed at the outer circumference of the base 50. 51 and the case 10 and the base 50 are assembled by engaging with each other by the assembling groove 11 and the assembling protrusion 51. Here, the assembling groove 11 and the assembling protrusion 51 may be formed of assembling protrusions and assembling grooves, respectively, to engage and assemble the case 10 and the base 50. It may be.

When the bracket 20 is installed in the case 10, a plurality of positioning holes 10a are formed in the case 10 so that the mounting position of the bracket 20 can be easily confirmed, and the bracket 20 Also, a plurality of positioning holes 20a are formed at positions corresponding to the positioning holes 10a.

In addition, when the FPC 41 and the air core coil 40 are fixedly installed in the base 50, the internal space of the air core coil 40 in which the core 42 is installed is positioned in order to accurately position the hole. 40a), positioning holes 41a and 50a are formed in the FPC 41 and the base 50 at positions corresponding to the positioning holes 40a, respectively (see Fig. 6).

In the base 50, a half blanking part 53 having a predetermined size groove is formed, and the FPC 41 is installed in the half blanking part 53 so that the FPC 41 is connected to the base ( 50) eliminates or minimizes the protruding parts when installed.

In addition, the base 50 preferably forms a plurality of hemispherical circular protrusions 52 around the half blanking portion 53.

The circular protrusion 52, the one side of the bracket 23 for receiving the weight (21, 22) therein is fixed to the '23'-shaped spring 23 is installed vibration generator according to the present invention When a device such as a mobile phone having a drop, which is dropped by a drop test or a mistake, sagging occurs in a direction in which the weights 21 and 22 fall, and the air core coil 40 is disposed below the weights 21 and 22. Since the deflection occurs in the direction in which the weights 21 and 22 fall, the colliding with the air core coil 40 located at the lower portion of the weight 21 and 22 is caused, thereby causing the cutting or disconnection of the air core coil 40. It is provided to prevent the occurrence of such a defect.

The circular protrusions 52 formed in the hemispherical shape around the half blanking portion 53 in the base 50 may hit the circular protrusions 52 even if the weights 21 and 22 are sag in a drop test or the like. It is no longer in contact with the air core coil 40.

The circular protrusions 52 are formed in plural numbers (shown as three in the drawing) so that the weights 21 and 22 do not come into contact with the air core coil 40 even if they fall in any direction in a drop test or the like. It is desirable to.

Next, the vibration generator manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.

The vibration generator having the structure as described above according to the present invention is a small product and its components are also small, so the performance of the vibration generator is greatly influenced by the positional tolerances between the parts in the process of manufacturing the vibration generator. There is a problem with gender, so there is a need to improve it.

Correspondingly, the vibration generator manufacturing method according to the present invention is to form and manufacture a positioning hole for the convenience of assembly and ease of manufacturing process between each component.

9, the vibration generator manufacturing method according to the present invention is fixed to the bracket 20 and the case 10 by assembling the '23' shaped spring 23 to the bracket 20 as shown in FIG. The first assembly process of inserting the weight and the magnet 30 into the inner space of the assembly and the FPC 41 and the air core coil 40 to the base 50 in a separate process from the first assembly process The vibration generator is divided into a second assembly step of assembling and installing, and the vibration generator is manufactured through a third assembly step of assembling the first assembly assembled in the first assembly step and the second assembly assembled in the second assembly step.

In the first assembly process, the weight may be a single weight, but is composed of a first weight 21 having a groove and a second weight 22 having a through portion, and the magnet 30 is a magnetic material. It may be assembled to be inserted into the through portion of the second weight 22 while being placed in the groove of the first weight 21 via the (31). The yoke 31 may be omitted when the bracket 20 is made of a magnetic material.

Looking at the first assembly process (when the yoke 31 is provided with the weight being the first weight 21 and the second weight 22), the positioning hole 20a of the bracket 20 is It is seated on the center pin of the assembly tool (step S11), and fixed to one surface of the bracket (20) one end of the 'c' shaped spring 23 (step S12) the 'c' shaped spring ( 23) is fixed to the bracket 20, the center pin of the case assembly jig to match with the positioning hole (10a) of the case 10, and the spring 23 is fixed fixedly installed After mounting the bracket 20 to the case 10 (step S14), the other end of the spring 23 fixed to the bracket 20 is fixed to one surface of the case 10 (step S15), The first weight 21, the yoke 31, the magnet 30, and the second weight 22 are inserted in the internal space of the bracket 20 in the order of step S16. Thereby completing the assembly.

In this case, the first weight 21, the yoke 31, the magnet 30, and the second weight 22 inserted into the internal space of the bracket 20 may be inserted and fixed.

When the weight is composed of one in the first assembly process and the yoke 31 is not installed, a penetrating part may be formed in the weight to install the magnet 30 in the penetrating part.

Meanwhile, as another embodiment of the first assembling process for the vibration generator having a structure in which the bracket 20 is omitted in the method of manufacturing the vibration generator according to the present invention, as shown in FIG. Insert the 30 and fixedly coupled to the weight to the spring 23, the spring 23 can be fixed to the case.

The first assembly process for the vibration generator having a structure without the bracket 20 will be described in detail with reference to FIG. 10.

The magnet 30 is inserted into the weight (step S41), and a bond is injected between the weight and the magnet 30 to fix the magnet 30 and the weight (step S42), and the magnet 30 ) And harden the injected bond to fix the weight and fix the weight and the magnet 30 (step S43). Next, the magnet 30 and the weight fixedly installed are fixed to the spring 23 by welding or the like (step S44), and the spring 23 is fixed to the case by welding to the case (S45). Step) Complete the first assembly process.

Looking at the second assembling process, which is a separate process from the first assembling process, it is seated on the positioning hole 50a of the base 50 and the center pin of the base assembly tool (step S21), and the FPC. The positioning hole 41a and the center pin of the base assembly tool (41) are seated (step S22), and the positioning hole 40a of the air core coil 40 and the center pin of the base assembly tool are seated. (Step S23) Next, the FPC and the air core coil are fixed to the base (step S24), and the core 42 is inserted into and fixed to the internal space of the air core coil 40, that is, the positioning hole 40a. (Step S25) to complete the second assembly.

The process of assembling the first assembly assembled in the first assembly process and the second assembly assembled in the second assembly process may include a plurality of assembling grooves on the outer periphery of the open surface of the case 10. And the outer periphery of the base 50 is formed with an assembling protrusion (凸 part, 51) is the case 10 and the base 50 by the assembling groove 11 and the assembling protrusion 51 It can be assembled simply by engaging with each other.

As described above, the case 10 and the bracket 20 have positioning holes 10a and 20a formed at corresponding positions, respectively, so that the two parts can be accurately assembled and assembled using the center pin of the tool. .

In addition, even when the FPC 41 and the air core coil 40 are assembled to the base 50, the positioning holes 50a, 41a, and 40a are formed at corresponding positions. It is possible to assemble precisely.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that it is possible.

10: case 10a, 20a: positioning hole
11: mounting groove 20: bracket
21: first weight 22: second weight
23: spring 30: magnet
31: yoke 40: air core coil
40a, 41a, 50a: positioning hole 41: FPC
42: core 50: base
51: assembly protrusion 52: circular protrusion

Claims (21)

A case in which one side is opened and a recess or recess is formed at the outer circumference;
A vibrator including a weight installed inside the case;
A spring fixedly installed in the case,
A magnet providing an electromagnetic force so that the vibrator vibrates horizontally;
A magnetic field generating unit including an air core coil installed at a predetermined gap with the magnet;
Consists of a base or the base is formed on the outer periphery so as to close the open surface of the case is engaged and assembled with the case
.
The method of claim 1,
The vibrator is composed of a bracket that provides a space inside the case and the weight is installed inside the bracket
.
The method of claim 1,
The spring wraps the weight in a 'c' shape, one end of which is coupled to the case and the other end of which is fixedly coupled to the weight.
.
4. The method according to any one of claims 1 to 3,
The air core coil is formed in the inner space and the core can be installed or omitted in the inner space
.
4. The method according to any one of claims 1 to 3,
The weight is composed of a first weight having a groove and a second weight having a through portion, wherein the magnet is inserted into the through portion of the second weight while being placed in the groove of the first weight via a metal yoke.
.
5. The method of claim 4,
The magnetic field generating unit is installed in the base,
A flexible printed circuit (FPC) having a circuit pattern is installed on the upper surface of the base, and an air core coil having the core is installed on the upper surface of the FPC.
.
4. The method according to any one of claims 1 to 3,
Forming a plurality of positioning holes in the case and the bracket so that the mounting position of the bracket can be easily confirmed when the bracket is installed in the case
.
5. The method of claim 4,
Cores installed in the inner space of the air core coil has a height equal to or higher than the height of the air core coil
.
4. The method according to any one of claims 1 to 3,
The air core coil is wound with a self bonding wire
.
4. The method according to any one of claims 1 to 3,
The air core coil has a circular or rectangular cross section
.
4. The method according to any one of claims 1 to 3,
The magnet is a Nd-Fe-B sintered magnet, and the magnet is magnetized in two poles (N pole and S pole) in left and right directions.
.
The method according to claim 6,
Forming a half blanking part on the base and installing the FPC on the half blanking part
.
The method of claim 12,
The base forms a plurality of circular protrusions around the half blanking portion.
.
delete 4. The method according to any one of claims 1 to 3,
The weight is a weight having a penetrating portion, the magnet and the yoke is inserted into the penetrating portion
. 16. The method of claim 15,
The yoke can be omitted if the bracket is a magnetic material
.
A case with one side open; A vibrator including a weight installed inside the case; A spring fixedly installed in the case; A magnetic field generating unit including a magnet providing electromagnetic force to vibrate the vibrating unit horizontally, an air core coil and a flexible printed circuit (FPC) installed at a predetermined gap with the magnet; In the method for manufacturing a vibration generator consisting of; a base which is assembled by closing the open surface of the case,
A first assembly process of inserting a magnet into the weight, fixing the weight to the spring, and fixing the spring to the case;
A second assembly step of assembling and installing the FPC and the air core coil on the base in a separate process from the first assembly step;
Completing the vibration generator through a third assembly process of assembling the assembly assembled in the first assembly process and the assembly assembled in the second assembly process
Vibration generator manufacturing method, characterized in that
18. The method of claim 17,
The first assembly process,
Inserting the magnet into the weight;
A bond injecting step for fixing the magnet and the weight;
Curing the implanted bond to fix the magnet and the weight;
Welding the spring to the weight;
Welding the spring to the case
Vibration generator manufacturing method, characterized in that consisting of
18. The method of claim 17,
The second assembly step of assembling and installing the FPC and the air core coil on the base,
Matching and seating the positioning pin of the base and the center pin of the base assembly tool;
Matching and seating the positioning hole of the FPC and the center pin of the base assembly tool;
Matching and seating the positioning hole of the air core coil and the center pin of the base assembly tool;
Fixing the FPC and the air core coil to the base
Vibration generator manufacturing method, characterized in that consisting of
20. The method of claim 19,
And fixing the core to the inner space of the air core coil after fixing the FPC and the air core coil to the base.
Vibration generator manufacturing method, characterized in that
18. The method of claim 17,
The process of assembling the assembly assembled in the first assembly process and the assembly assembled in the second assembly process in the third assembly process,
A plurality of convex parts or concave parts are formed on the outer periphery of the case, and a concave part or concave part is formed on the outer periphery of the base so that the case and the base are assembled with each other.
Wherein the vibration generator comprises:

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