CN111953170B - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN111953170B CN111953170B CN202010601170.0A CN202010601170A CN111953170B CN 111953170 B CN111953170 B CN 111953170B CN 202010601170 A CN202010601170 A CN 202010601170A CN 111953170 B CN111953170 B CN 111953170B
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- Prior art keywords
- yoke
- spring
- flange
- bracket
- piece
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
- F16F1/027—Planar, e.g. in sheet form; leaf springs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/04—Balancing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
- H04M19/047—Vibrating means for incoming calls
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Signal Processing (AREA)
Abstract
The invention relates to a linear vibration motor, which comprises a bracket, a coil and a spring, wherein the bracket is arranged on the bracket and is connected with a weight part, so that vibration is amplified and the resonance frequency is determined; a magnet having a lower end inserted into an upper portion of the coil at a predetermined distance such that an upper end thereof is fixed to an inner side surface of an upper portion of the yoke, and generating a magnetic field by a permanent magnet and generating vertical vibration by acting on the magnetic field of the coil; a yoke fixed to form a closed magnetic field loop, and a weight fixed to an outer side thereof to concentrate a magnetic field; a weight section connected to the spring, for amplifying vibration by weight and determining a resonance frequency so that the yoke is fixed; and a box part forming a shell to protect the vibrating body so as to form a magnetic field closed loop; thereby enabling to prevent the vibration body from being eccentric, and to improve the intermediate assemblability, and to improve the electromagnetic field force, thereby enabling to drive at a fast response speed and a wide frequency band.
Description
Technical Field
The present invention relates to a linear vibration motor, and more particularly, to a linear vibration motor in which a coil is fixed at the center of a bracket, thereby preventing eccentricity, improving intermediate assembly, and improving electromagnetic field force, thereby improving vibration characteristics.
Background
In general, with the recent rapid development of wireless communication technology, portable communication devices have been increasingly downsized and light-weighted, and with the trend toward downsizing and light-weighting, components including mechanical devices, IC chips, and circuits mounted inside the portable communication devices have become highly concentrated and highly functionalized, and therefore, in order to improve space utilization, it is necessary to improve the size and shape.
In addition, a flat vibration motor, which is mounted inside a portable communication device and gives information arrival by silent vibration, has been studied in a large amount in accordance with the above-described trend.
The initial model of the vibration motor mounted in the portable communication device is a rotary vibration motor having a stator and a rotor as basic structures, in which a rod is fixed to a holder of the stator and the rotor is supported and rotated by the rod to generate vibration, and in order to increase the vibration force, the rotor is increased in size or the number of revolutions is increased to improve the vibration force.
In order to improve the problem of the rotary type vibration motor, a horizontal vibration type actuator type vibration motor has recently been disclosed, which includes: an upper tank part and a lower tank part which are combined with each other; a magnetic force generating means formed on at least one surface of the upper case portion and the lower case portion; a magnet acted by an attractive force or a repulsive force opposite to the magnetic force generating means; a weight part which is provided with a magnet and is integrated with the magnet, moves left and right and increases vibration force; an elastic means located at the lower part of any one of the upper surface and the lower surface of the weight part for elastically supporting the weight part, and a fixing component for fixing the other end of the elastic means to the upper box part and the lower box part.
Such a horizontal vibration actuator type vibration motor has been recently widely used because it has a longer service life, overcomes the size limit, and can achieve a faster response speed than a rotary type vibration motor.
In addition, the horizontal vibration motor allows internal components not to be impacted by the vibration body, so that the life span of the vibration motor can be increased, and the improvement of vibration force enables the manufacture of an excellent vibration motor, and thus it is required to continuously develop a vibration motor having more improved durability and vibration force.
Detailed Description
Documents of the prior art
Patent document
(patent document 1) laid-open patent publication No. 10-2010-0073301 (2010.07.01.)
Disclosure of Invention
Technical problem to be solved
The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a linear vibration motor which can prevent eccentricity, improve intermediate assembly, and improve electromagnetic field force, thereby being driven at a high response speed and a wide frequency band.
Technical scheme
In order to accomplish the above object, the present invention provides a linear vibration motor, which includes a bracket 100; a flexible printed circuit board 200 mounted on an upper portion of the support 100 so that an external power can be supplied to the coil 300; a coil 300 installed on the support 100, generating an electromagnetic field by an external signal, and reacting with the magnet 500, thereby allowing vertical vibration to be amplified; a spring 400 mounted on the bracket 100 and connected to the weight part 700 to amplify vibration and determine a resonance frequency; a magnet 500 having a lower end inserted into the upper portion of the coil 300 at a predetermined distance and an upper end fixed to an inner surface of the upper portion of the yoke 600, and generating a magnetic field by a permanent magnet and generating vertical vibration by acting on the magnetic field of the coil 300; a yoke 600 fixed by the magnet 500 to form a magnetic field closed loop, and a weight 700 fixed to an outer side thereof to concentrate a magnetic field; a weight part 700 connected to the spring 400, for amplifying vibration by weight and determining a resonance frequency so that the yoke 600 is fixed; and a case part 800 forming a housing to protect the vibration body so that a magnetic field closed loop is formed; thereby enabling to prevent the vibration body from being eccentric, and to improve the intermediate assemblability, and to improve the electromagnetic field force, thereby enabling to drive at a fast response speed and a wide frequency band.
A linear vibration motor includes a bracket (100); a flexible printed circuit board (200) mounted on an upper portion of the bracket (100) such that an external power can be supplied to the coil (300); a coil (300) mounted on the bracket (100) for generating an electromagnetic field by an external signal to react with the magnet (500) to amplify the vertical vibration; a spring (400) attached to the bracket (100) and connected to the weight section (700) to amplify vibration and determine a resonance frequency; a magnet (500) having a lower end inserted into the upper portion of the coil (300) at a predetermined distance such that an upper end thereof is fixed to an inner surface of the upper portion of the yoke (600), and generating a magnetic field by a permanent magnet and generating vertical vibration by acting on the magnetic field of the coil (300); a yoke (600) to which the magnet (500) is fixed to form a closed magnetic field loop, and a weight (700) is fixed to an outer side to concentrate a magnetic field; a weight section (700) connected to the spring (400), which amplifies vibration by weight and determines a resonance frequency so that the yoke section (600) is fixed; and a box section (800) forming a housing to protect the vibrating body so that a closed magnetic field loop is formed; in the bracket (100), a bracket main body (110) is provided in the bracket (100), the flexible printed circuit board mounting part (111) extends outwards, a coil fixing part (120) protrudes upwards from the center of the bracket main body (110), a net part (130) is provided at the outer side of the bracket main body (110) with a specified height, so that the inner space can be ensured, a spring mounting part (140) is provided at the upper part of the net part (130), so that the lower part of a spring (400) is supported in a placing state;
the spring (400) comprises a spring main body (410) which is provided with a first flange placing expansion sheet (411), a second flange placing expansion sheet (412) and a third flange placing expansion sheet (413) which protrude and extend outwards at a specified distance and are provided at equal intervals; a yoke support piece (420) having a yoke coupling hole (421) in the center of the spring body (410); and a spring attachment tab (430) that attaches the first flange mounting extension tab (411) to the yoke support tab (420);
in the yoke (600), only the upper surface of a cylindrical yoke body (610) with an open lower part is provided with a yoke step part (620), the yoke step part (620) is provided with a depth (T), and the lower end of the yoke body (610) extends outwards to form a curved annular flange part (611);
the spring mounting part (140) of the net part (130) of the bracket main body (110) is provided with a ring-shaped flange sheet (141) to facilitate the mounting of the end part of the disc-shaped spring (400), the flange sheet (141) is provided with a flange expansion sheet (142) with a specified distance, a first flange placing expansion piece (411), a second flange placing expansion piece (412) and a third flange placing expansion piece (413) which are formed by projecting and extending towards the outer side of the spring main body (410) at equal intervals are arranged on the flange expansion piece (142), the lower part of the box part (800) is provided with an expansion piece insertion groove (810), and the first flange placing expansion piece (411), the second flange placing expansion piece (412) and the third flange placing expansion piece (413) are inserted into the expansion piece insertion groove (810) of the box part (800) in a state of being mounted on the spring mounting part (140).
The coil (300) has a cylindrical shape, and is coupled to the inner edge of the lower end of the cylindrical shape so as to sandwich a coil fixing portion (120) formed to protrude upward from the center of the holder main body (110).
The yoke coupling hole (421) includes three yoke mounting surfaces, namely a first yoke mounting surface (421a), a second yoke mounting surface (421b) and a third yoke mounting surface (421c), which are equally spaced, an elastic restoring surface (421d) is arranged among the first yoke mounting surface (421a), the second yoke mounting surface (421b) and the third yoke mounting surface (421c), the spring connection piece (430) is provided with a first spring connection piece (431) in a bent form from the first flange placing expansion piece (411) to the second flange placing expansion piece (412), a second spring connecting piece (432) with a curvature changing is arranged on a part, where the second flange placing expansion piece (412) is positioned, of the end part of the first spring connecting piece (431), and a third spring connecting piece (433) is connected from the end part of the second spring connecting piece (432) to the outer side of the elastic restoring surface (421d) of the middle of the third flange placing expansion piece (413).
The width (S1) of the portion where the first spring connecting piece (431) starts and the width (S2) of the portion where the third spring connecting piece (433) starts are wider than the width (S3) of the second spring connecting piece (432).
The lower end of the yoke (600) protrudes by a length H from the lower end of the weight section (700), and is sandwiched between a first yoke mounting surface (421a), a second yoke mounting surface (421b), and a third yoke mounting surface (421c) of a yoke coupling hole (421) provided in the spring (400).
A Damper (DP) is provided between the upper portion of the spring (400) and the weight portion (700).
Effects of the invention
Accordingly, the present invention provides a linear vibration motor capable of preventing a vibration body from being eccentric.
Furthermore, the assemblability can thereby be improved.
Furthermore, the number of parts can thereby be minimized, thereby reducing manufacturing costs.
In addition, the electromagnetic field force is thereby improved, and the vibration characteristics can be improved.
In addition, the shortcomings of the existing rotary DC motor are improved, the driving noise is reduced by a linear vibration mode, the vibration body vibrates in a non-contact mode, and the driving service life is prolonged.
Drawings
Fig. 1 is an exploded perspective view of a linear vibration motor according to the present invention.
Fig. 2 is a longitudinal sectional view of a linear vibration motor according to the present invention.
Fig. 3a is a view showing measured values of an electromagnetic field force when a coil fixing portion is in a protruding state in a linear vibration motor according to the present invention, and fig. 3b is a view showing measured values of an electromagnetic field force when a coil fixing portion is not protruding in a linear vibration motor according to the related art.
Fig. 4 is a view showing that a magnetic field is concentrated at a step portion of a yoke by a magnet in the linear vibration motor according to the present invention.
Fig. 5 is a longitudinal sectional view illustrating another embodiment of a yoke in a linear vibration motor according to the present invention.
Fig. 6 is a plan view showing a spring in the linear vibration motor according to the present invention.
Fig. 7 is a longitudinal sectional view showing another embodiment in the linear vibration motor according to the present invention.
Fig. 8 is a front view of a linear vibration motor according to the present invention.
Description of the reference numerals
100: the support 110: support main body
111: flexible printed circuit board mounting portion 120: coil fixing part
130: the mesh part 140: spring mounting part
141: flange piece 142: flange expansion sheet
400: the spring 410: spring body
412. 412, 413: the first flange is provided with an expansion sheet, the second flange is provided with an expansion sheet, and the third flange is provided with an expansion sheet
420: the yoke support piece 421: yoke coupling hole
421a, 421b, 421 c: first yoke mounting surface, second yoke mounting surface, and third yoke mounting surface
421 d: elastic restoring surface 430: spring connecting sheet
431: first spring attachment tab 500: magnet body
700: a weight portion 600: yoke part
610: yoke body 620: yoke step portion
800: the box portion 810: expansion piece insertion groove
Detailed Description
The present invention may be modified in various ways and may have various embodiments, and specific embodiments will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
In order that those skilled in the art will be able to understand the present invention in more detail, embodiments of the present invention are provided. Therefore, the forms of the respective elements shown in the drawings may be exaggerated for the purpose of more clearly illustrating the forms, and a detailed description thereof will be omitted when it is considered that a detailed description of the related known art may obscure the gist of the present invention in describing the present invention.
The terms first, second, etc. may be used when describing various components, but these components are not limited to these terms. The terms are only used to distinguish one constituent element from other constituent elements.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "a" or "an" when used in this specification is not meant to imply a limitation to the number of items.
The terms "comprising" or "having" in the present invention are used to indicate the presence of the features, numerals, steps, actions, components, parts or combinations thereof described in the specification, and should not be understood to exclude the presence or addition of one or more other features, numerals, steps, actions, components, parts or combinations thereof in advance.
First, the present invention relates to a linear vibration motor, which may include at least one of a bracket 100, a flexible printed circuit board 200, a coil 300, a spring 400, a magnet 500, a yoke 600, a weight part 700, and a case part 800.
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, fig. 1 is an exploded perspective view of a linear vibration motor according to the present invention, and fig. 2 is a longitudinal sectional view of the linear vibration motor according to the present invention.
According to one embodiment of the present invention, a stand 100 is included; a flexible printed circuit board 200 mounted on an upper portion of the support 100 so that an external power can be supplied to the coil 300; a coil 300 mounted on the holder 100, generating an electromagnetic field by an external signal, and reacting with the magnet 500, thereby amplifying vertical vibration; a spring 400 mounted on the bracket 100 and connected to the weight part 700 to amplify vibration and determine a resonance frequency; a magnet 500 having a lower end inserted into the upper portion of the coil 300 by a predetermined distance and an upper end fixed to an inner surface of the upper portion of the yoke 600, and generating a magnetic field by a permanent magnet and generating vertical vibration by acting on the magnetic field of the coil 300; a yoke 600 fixed by the magnet 500 to form a magnetic field closed loop, and a weight 700 fixed to an outer side thereof to concentrate a magnetic field; a weight part 700 connected to the spring 400, for amplifying vibration by weight and determining a resonance frequency so that the yoke 600 is fixed; and a case part 800 forming a housing to protect the vibration body so that a closed loop of a magnetic field is formed.
In the holder 100, a holder main body 110 is provided in which a flexible printed circuit board mounting portion 111 is extended outward, a coil fixing portion 120 is provided to protrude upward at the center of the holder main body 110, a net portion 130 is provided at a predetermined height outside the holder main body 110 to secure an inner space, and a spring mounting portion 140 is provided at an upper portion of the net portion 130 to support a lower portion of a spring 400 in a state of being placed.
In the spring mounting portion 140, in order to facilitate mounting of the end portion of the disc-shaped spring 400, the flange extension piece 142 having a predetermined pitch is provided on the annular flange piece 141, and the first flange mounting extension piece 411, the second flange mounting extension piece 412, and the third flange mounting extension piece 413 are mounted on the flange extension piece 142, thereby preventing eccentricity from occurring at the time of assembly.
The coil 300 has a cylindrical shape having a predetermined diameter and height, and is coupled to the inner edge of the lower end of the cylindrical shape so as to sandwich the coil fixing portion 120 formed to protrude upward from the center of the holder body 110, thereby preventing the eccentricity between the members from occurring in the process of coupling the coil to the holder 100.
The spring 400 is in a disk shape, is formed of a spring body 410 having a predetermined thickness, and includes a first flange mounting expansion piece 411, a second flange mounting expansion piece 412, and a third flange mounting expansion piece 413 protruding and extending outward by a predetermined distance at equal intervals so as to be mounted on the flange expansion piece 142 of the bracket 100, a yoke support piece 420 is provided at the center of the spring body 410, a yoke coupling hole 421 is provided at the center of the yoke support piece 420, and the first flange mounting expansion piece 411 and the yoke support piece 420 are integrally connected at both sides by a spring connection piece 430.
The yoke coupling hole 421 includes three yoke mounting surfaces 421a, 421b, and 421c, which are equally spaced apart from each other, and an elastic restoring surface 421d is provided between the yoke mounting surfaces 421a, 421b, and 421c, so that the outer peripheral edge of the yoke 600 can be maintained in a compressed state by an elastic force of the elastic restoring surface 421d in a state of being in contact with the yoke mounting surfaces 421a, 421b, and 421 c. That is, in the process of inserting the yoke 600 into the yoke coupling hole 421, the elastic restoring surface 421d is inclined outward by the force of inserting the yoke 600, so that the diameters of the first, second, and third yoke attachment surfaces 421a, 421b, and 421c are increased, and the diameters of the first, second, and third yoke attachment surfaces 421a, 421b, and 421c are decreased as the elastic restoring surface 421d is restored inward while the insertion of the yoke 600 is stopped at a certain position, so that the fixed state can be maintained.
In the spring connection piece 430, a first spring connection piece 431 is provided in a curved form from the first flange-placed expansion piece 411 to the second flange-placed expansion piece 412, a second spring connection piece 432 having a curvature varying in a portion where the second flange-placed expansion piece 412 is located, which is an end portion of the first spring connection piece 431, is provided, and a third spring connection piece 433 is connected to an outer side of the elastic restoring surface 421d from an end portion of the second spring connection piece 432 to a middle of the third flange-placed expansion piece 413.
In the yoke 600, it is preferable that only the upper surface of the cylindrical yoke body 610 having an open lower portion is provided with the yoke step part 620, and the yoke step part 620 concentrates the magnetic field, and the yoke step part 620 has a depth T.
The yoke 600 is provided to protrude by a length H from the lower end of the weight portion 700, and the yoke 600 is sandwiched between the first, second, and third yoke mounting surfaces 421a, 421b, and 421c provided in the yoke coupling hole 421 of the spring 400, thereby preventing eccentricity.
Referring to fig. 3a and 3b, fig. 3a is a view showing a measured value of an electromagnetic field force when a coil fixing portion is in a protruded state in a linear vibration motor according to the present invention, and fig. 3b is a view showing a measured value of an electromagnetic field force when a coil fixing portion is not protruded in a linear vibration motor according to the related art.
Fig. 3a is a view showing the measured value of the electromagnetic field Force when the coil fixing portion is in a protruding state, and a configuration in which the electromagnetic field between the coil fixing portion 120 and the magnet 500 formed protruding from the central portion of the holder 100 is concentrated is shown, and the electromagnetic field Force (Force) in the vibration direction (Z axis) is-0.074411, and fig. 3b is a view showing the measured value of the electromagnetic field Force when the coil fixing portion is not protruding, and a configuration in which the electromagnetic field between the magnets 500 is concentrated in a state in which the coil fixing portion 120 is not present on the holder 100, and the electromagnetic field Force in the vibration direction (Z axis) is-0.036016, and it is shown that the electromagnetic field Force in the vibration direction (Z axis) can be improved by 2 times or more.
Referring to fig. 4, fig. 4 is a view showing that a magnetic field is concentrated at a step portion of a yoke by a magnet in a linear vibration motor according to the present invention.
Fig. 4 shows that the yoke step part concentrates the magnetic field by the magnet in the linear vibration motor according to the present invention, and it can be understood that the magnetic field is concentrated on the yoke step part 620 provided in the yoke 600 located toward the edge side of the magnet 500 in a state where the magnet 500 is fixed to the yoke 600.
Referring to fig. 5, fig. 5 is a longitudinal sectional view illustrating another embodiment of a yoke in a linear vibration motor according to the present invention.
In the present invention, although the yoke 600 is formed in a cylindrical shape with only the lower portion opened, it is preferable that a ring flange portion 611 extended and bent outward be included at the lower end of the yoke body 610 in a cylindrical shape with only the lower portion opened, as shown in fig. 5, in addition to such a cylindrical shape.
Referring to fig. 6, fig. 6 is a plan view illustrating a spring in the linear vibration motor according to the present invention. In the spring 400 according to the present invention, as shown in fig. 6, it is preferable that the width S1 of the portion where the first spring attachment piece 431 starts and the width S2 of the portion where the third spring attachment piece 433 starts are wider than the width S3 of the second spring attachment piece 432. This is because amplification is made smoother by vibration and deformation and breakage are prevented from occurring at the middle end portion side.
Referring to fig. 7, fig. 7 is a longitudinal sectional view showing another embodiment in the linear vibration motor according to the present invention.
The yoke step 620 provided in the yoke 600 according to the present invention has a predetermined depth T, and the edge side may be coated with a magnetic fluid 630. In this case, the magnetic fluid 630 applied to the yoke step 620 is prevented from scattering, and the magnetic fluid 630 forms a band shape in a coil form in the direction of the magnetic field concentration portion, thereby controlling the vibration force and shortening the driving stop Time (Falling Time).
A Damper (DP) may be provided between the upper portion of the spring 400 and the weight portion 700. In this case, the Damper (DP) is attached at one or more positions, so that noise caused by collision between the vibrating body and the fixed body is prevented, the vibrating force is controlled, and the driving rest time can be shortened.
Referring to fig. 8, fig. 8 is a front view of a linear vibration motor according to the present invention.
According to the stent 100 of the present invention, the net part 130 of the stent body 100 includes the spring mounting part 140, the spring 400 has the first flange mounting expansion piece 411, the second flange mounting expansion piece 412 and the third flange mounting expansion piece 413 which are formed to protrude and extend to the outside of the disk-shaped spring body 410, the first flange mounting expansion piece 411, the second flange mounting expansion piece 412 and the third flange mounting expansion piece 413 are equally spaced, and the box part 800 has the expansion piece insertion groove 810 at the lower part thereof, so that the first flange mounting expansion piece 411, the second flange mounting expansion piece 412 and the third flange mounting expansion piece 413 are inserted into the expansion piece insertion groove 810 of the box part 800 in a state of being mounted on the spring mounting part 140, thereby more firmly fixing the spring 400 between the stent 100 and the box part 800.
The present invention has been described above with reference to the drawings, but this is merely an example, and various substitutions, modifications, and changes may be made without departing from the technical spirit of the present invention, and the present invention is not limited to the foregoing embodiments and drawings.
Claims (4)
1. A linear vibration motor, characterized in that it comprises a bracket (100); a flexible printed circuit board (200) mounted on an upper portion of the bracket (100) such that an external power can be supplied to the coil (300); a coil (300) mounted on the bracket (100) for generating an electromagnetic field by an external signal to react with the magnet (500) to amplify the vertical vibration; a spring (400) attached to the bracket (100) and connected to the weight section (700) to amplify vibration and determine a resonance frequency; a magnet (500) having a lower end inserted into the upper portion of the coil (300) at a predetermined distance such that an upper end thereof is fixed to an inner surface of the upper portion of the yoke (600), and generating a magnetic field by a permanent magnet and generating vertical vibration by acting on the magnetic field of the coil (300); a yoke (600) fixed by the magnet (500) to form a magnetic field closed loop, and a weight part (700) fixed to the outside to concentrate the magnetic field; a weight unit (700) connected to the spring (400), which amplifies vibration by weight and determines a resonance frequency so that the yoke (600) is fixed; and a box section (800) forming a housing to protect the vibrating body so that a closed magnetic field loop is formed; in the bracket (100), a bracket main body (110) is provided, wherein the flexible printed circuit board mounting part (111) extends outwards and is provided with a coil fixing part (120) protruding upwards from the center of the bracket main body (110), the outer side of the bracket main body (110) is provided with a net part (130) with a specified height so as to ensure an internal space, and the upper part of the net part (130) is provided with a spring mounting part (140) so that the lower part of a spring (400) is supported in a placing state;
the spring (400) comprises a spring main body (410) which is provided with a first flange placing expansion sheet (411), a second flange placing expansion sheet (412) and a third flange placing expansion sheet (413) which protrude and extend outwards at a specified distance and are provided at equal intervals; a yoke support piece (420) having a yoke coupling hole (421) in the center of the spring body (410); and a spring attachment tab (430) that attaches the first flange mounting extension tab (411) to the yoke support tab (420);
in the yoke (600), only the upper surface of a cylindrical yoke body (610) with an open lower part is provided with a yoke step part (620), the yoke step part (620) is provided with a depth (T), and the lower end of the yoke body (610) extends outwards to form a curved annular flange part (611);
the spring mounting part (140) of the net part (130) of the bracket main body (110) is provided with a ring-shaped flange sheet (141) to facilitate the mounting of the end part of the disc-shaped spring (400), the flange sheet (141) is provided with flange expansion sheets (142) with a specified distance, a first flange placing expansion piece (411), a second flange placing expansion piece (412) and a third flange placing expansion piece (413) which are formed by projecting and extending towards the outer side of the spring main body (410) at equal intervals are arranged on the flange expansion piece (142), an expansion piece insertion groove (810) is formed in the lower portion of the box portion (800), and the first flange-mounted expansion piece (411), the second flange-mounted expansion piece (412), and the third flange-mounted expansion piece (413) are inserted into the expansion piece insertion groove (810) of the box portion (800) in a state of being attached to the spring attachment portion (140);
the yoke coupling hole (421) is provided with three yoke mounting surfaces (421a, 421b, 421c) which are equally spaced, an elastic restoring surface (421d) is arranged among the first yoke mounting surface (421a), the second yoke mounting surface (421b) and the third yoke mounting surface (421c), the spring connection piece (430) is provided with a first spring connection piece (431) in a bent form from the first flange placing expansion piece (411) to the second flange placing expansion piece (412), a second spring connection piece (432) with a curvature changing is arranged on a part, where the second flange placing expansion piece (412) is positioned, which is an end part of the first spring connection piece (431), and a third spring connection piece (433) is connected from the end part of the second spring connection piece (432) to the outer side of the elastic restoring surface (421d) in the middle of a third flange placing expansion piece (413);
the width (S1) of the beginning of the first spring web (431) and the width (S2) of the beginning of the third spring web (433) are wider than the width (S3) of the second spring web (432).
2. The linear vibration motor according to claim 1, wherein the coil (300) has a cylindrical shape, and is coupled to a coil fixing portion (120) formed to protrude upward between the center of the bracket body (110) at an inner edge of a lower end portion of the cylindrical shape.
3. The linear vibration motor according to claim 1, wherein the lower end of the yoke (600) is provided to protrude by a length H from the lower end of the weight portion (700) and is sandwiched by a first yoke mounting surface (421a), a second yoke mounting surface (421b), and a third yoke mounting surface (421c) of a yoke coupling hole (421) provided in the spring (400).
4. The linear vibration motor according to claim 1, wherein a Damper (DP) is provided between an upper portion of the spring (400) and the weight portion (700).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| KR1020200035373A KR102144888B1 (en) | 2020-03-24 | 2020-03-24 | Linear vibration motor |
| KR10-2020-0035373 | 2020-03-24 |
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| CN111953170A CN111953170A (en) | 2020-11-17 |
| CN111953170B true CN111953170B (en) | 2022-09-20 |
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| CN202021220221.7U Active CN213367604U (en) | 2020-03-24 | 2020-06-29 | Linear vibration motor |
| CN202010601170.0A Active CN111953170B (en) | 2020-03-24 | 2020-06-29 | Linear vibration motor |
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| CN202021220221.7U Active CN213367604U (en) | 2020-03-24 | 2020-06-29 | Linear vibration motor |
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| KR102144888B1 (en) * | 2020-03-24 | 2020-08-28 | 에이유에스피코리아 주식회사 | Linear vibration motor |
| KR102401417B1 (en) * | 2022-01-14 | 2022-05-25 | 에이유에스피코리아 주식회사 | Shortcut direction horizontal linear vibration actuator |
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| KR101783628B1 (en) * | 2017-04-27 | 2017-10-24 | 주식회사 블루콤 | Linear type vibration motor vibrated Verticality |
| KR101951716B1 (en) * | 2017-09-11 | 2019-05-09 | 주식회사 블루콤 | Linear type vibration motor vibrated Verticality |
| KR101907520B1 (en) * | 2018-04-30 | 2018-12-05 | 주식회사 블루콤 | Rectangular vertical vibration motor |
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- 2020-03-24 KR KR1020200035373A patent/KR102144888B1/en active IP Right Grant
- 2020-06-29 CN CN202021220221.7U patent/CN213367604U/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN213367604U (en) | 2021-06-04 |
| KR102144888B1 (en) | 2020-08-28 |
| CN111953170A (en) | 2020-11-17 |
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