Horizontal Linear Vibration Motor

Abstract

The present invention relates to a horizontal linear vibration motor, and more particularly to a horizontal linear vibration motor, which is formed with a stopper rod made of a non-magnetic body in the form of a rectangular flat plate, and has assembly grooves at both end portions of the stopper rod body, wherein the assembly grooves have any one of a semicircular, elliptical and polygonal shape; a yoke plate fixing groove is formed by a guide shape introduced inward from the central portion of the stopper rod body, and a support sheet is formed by protruding outward from the inside of the guide shape; a spring protection protrusion is formed in the portion of the assembly groove spaced inwardly at a predetermined interval, thereby preventing deformation of the spring caused by the impact of a weight portion. The vibration motor is driven horizontally, thereby improving the resonance noise of the camera, maximizing the concentration of the intermediate electromagnetic field, and thereby improving the vibration response time.

Description

Technical Field

[0001] The present invention relates to a horizontal linear vibration motor, and in particular to a horizontal linear vibration motor, which enables the vibration motor to be driven horizontally, thereby improving the resonance noise of a camera, maximizing the concentration of an intermediate electromagnetic field, and thus improving the vibration response time. Background Art

[0002] Generally, with the recent rapid development of wireless communication technology, portable communication devices are gradually developing towards miniaturization and lightweight. With this trend of miniaturization and lightweight development, components including mechanical devices, IC chips and circuits installed inside portable communication devices have become highly centralized and highly functional, so in order to improve space utilization, it is necessary to improve the size and shape.

[0003] In addition, a large number of studies have been conducted on flat vibration motors that are installed inside portable communication devices and notify the arrival of information through silent vibrations in response to the above-mentioned trend.

[0004] The initial model of the vibration motor installed in the portable communication device was a rotary vibration motor with a stator and a rotor as the basic structure. In this rotary vibration motor, a rod is fixed to the stator bracket so that the rotor is supported and rotated on the rod to generate vibration. In order to increase the vibration force, the volume of the rotor is increased or the number of revolutions is increased to improve the vibration force. However, due to structural problems, there are limitations in miniaturization, and there are great difficulties in generating high vibrations. There is also the problem of difficulty in ensuring a lifespan of more than a specified time.

[0005] In order to improve the problems of rotary vibration motors, a horizontal vibration actuator type vibration motor has been recently disclosed, and the disclosed horizontal vibration actuator type vibration motor includes: an upper box part and a lower box part that are combined with each other; a magnetic force generating means formed on at least one side of the upper box part and the lower box part; a magnet that is subjected to an attractive force or a repulsive force relative to the magnetic force generating means; a weight part that is installed with the magnet and becomes one with it, and moves left and right to increase the vibration force; an elastic means located at the lower part of any one side of the upper and lower sides of the weight part to elastically support the weight part, and a fixing member for fixing the other end of the elastic means to the upper box part and the lower box part. .

[0006] Such horizontal vibration type actuator type vibration motors have been widely used recently because they can extend the service life, overcome the size limitation, and obtain a fast response speed compared to rotary type vibration motors.

[0007] In addition, the horizontal vibration motor prevents the internal components from being impacted by the vibrating body, thereby increasing the life of the vibration motor. Increasing the vibration force can produce an excellent vibration motor, so there is a need to continue to develop vibration motors with improved durability and vibration force.

[0008] Prior art literature

[0009] Patent Literature

[0010] (Patent Document 1) Patent Publication No. 10-2010-0073301 (2010.07.01.) Summary of the invention

[0011] Technical issues to be solved

[0012] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a horizontal linear vibration motor, so as to improve the resonance noise of the camera, maximize the concentration of the intermediate electromagnetic field, and thus improve the vibration response time.

[0013] Technical Solution

[0014] In order to achieve the above-mentioned object, the present invention provides a horizontal linear vibration motor, which includes a bracket (BR); a flexible printed circuit board (FPCB) formed toward the upper part of the bracket; a stopper 100, which fixes the yoke plate 300 at the original position toward the upper part of the flexible printed circuit board to prevent the deformation of the spring 500 caused by impact; a coil (CO), which generates a vibration signal according to the electromagnetic field generated by contact with the flexible printed circuit board; a transmission shaft 200, the ends of which are inserted into the coil in an exposed manner, so as to concentrate the internal electromagnetic field and make the yoke plate 300 is maintained; the yoke plate 300 is respectively clamped on both sides of the transmission shaft 200, and the lower end is fixed to the bracket; the magnet 400 acts on the magnetic field of the coil to make the left and right sides of the weight part vibrate horizontally; the magnetic plate makes the magnetic field of the magnet concentrated and fixed; the weight part fixes the magnetic plate, generates vibration by weight, and is connected to the spring 500 to determine the resonance frequency; the spring 500 amplifies the vibration of the weight part, is connected to the inner end to determine the resonance frequency, and the outer end is connected to the inner side of the box part (CA); the box part is combined with the bracket. As a result, the concentration of the electromagnetic field is maximized, so that the vibration response time can be improved, so that the resonance noise of the middle camera is improved.

[0015] Effects of the Invention

[0016] The present invention provides a horizontal linear vibration motor, which enables the vibration motor to be driven horizontally, thereby improving the resonance noise of the camera, maximizing the concentration of the intermediate electromagnetic field, and improving the vibration response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is an exploded perspective view of a horizontal linear vibration motor according to the present invention.

[0018] Figure 2 It is a longitudinal sectional view of a horizontal linear vibration motor according to the present invention.

[0019] Figure 3 is a cross-sectional view of a horizontal linear vibration motor according to the present invention.

[0020] Figure 4 This is a diagram showing a state in which a yoke plate is coupled to an upper portion of a bracket via a stopper rod in a horizontal linear vibration motor according to the present invention.

[0021] Figure 5 A cross-sectional view showing an arrangement of magnets in which a yoke plate is bonded to both sides of a transmission shaft sandwiching a coil and a magnet plate is bonded around the yoke plate in a horizontal linear vibration motor according to the present invention.

[0022] Figure 6 The horizontal linear vibration motor according to the present invention is a longitudinal cross-sectional view showing various forms of coils.

[0023] Figure 7 A front view of a spring is shown in the horizontal linear vibration motor according to the present invention.

[0024] Figure 8a A diagram showing the attractive force and repulsive force formed according to the electromagnetic field distribution in the horizontal linear vibration motor according to the present invention; Figure 8b A diagram showing the direction of a magnetic field in a horizontal linear vibration motor according to the present invention; Figure 8c A comparison diagram showing electromagnetic field distribution in the horizontal linear vibration motor according to the present invention with and without a magnet plate is shown.

[0025] Fig. 9 FIG. 4 is a comparison diagram of response characteristics of the horizontal linear vibration motor according to the present invention and the existing horizontal vibration motor.

[0026] Fig.10 FIG. 4 is a cross-sectional view of a horizontal linear vibration motor according to another embodiment of the present invention.

[0027] Fig.11 FIG. 4 is a cross-sectional view of a horizontal linear vibration motor according to another embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] 100: Stopper rod 200: Transmission shaft

[0030] 300: yoke plate 400: magnet

[0031] 500: Spring BR: Bracket

[0032] CA: Box CO: Coil

[0033] MP: Magnetic Plate PCB: Flexible Printed Circuit Board

[0034] WT: Weight DETAILED DESCRIPTION

[0035] Below, the present invention can be subjected to various transformations and can have various embodiments, and specific embodiments are described in detail through 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 transformations, equivalents and even substitutes within the concept and technical scope of the present invention.

[0036] In order to enable those skilled in the art to understand the present invention in more detail, embodiments of the present invention are provided. Therefore, the forms of the various elements shown in the drawings may be exaggerated in order to more clearly illustrate these forms. When describing the present invention, if it is considered that the specific description of the related known technology will confuse the main purpose of the present invention, the detailed description will be omitted.

[0037] The terms "first", "second" and the like may be used to describe various components, but these components are not limited to these terms. The terms are only used to distinguish one component from other components.

[0038] The terms used in the present invention are only used to illustrate specific embodiments and are not intended to limit the present invention. Singular expressions include plural meanings unless the language clearly indicates other meanings.

[0039] In the present invention, the terms "include" or "have" are intended to indicate the existence of the features, numbers, steps, actions, constituent elements, parts or their combinations recorded in the specification, and should be understood as not excluding in advance the existence or additional possibilities of one or more other features or numbers, steps, actions, constituent elements, parts or their combinations.

[0040] First, the present invention relates to a horizontal linear vibration motor, including any one or more of a bracket, a flexible printed circuit board, a stopper rod 100, a coil, a transmission shaft 200, a yoke plate 300, a magnet 400, a magnet plate, a weight part, a spring 500 and a box part.

[0041] The preferred embodiments of the present invention are described in more detail below with reference to the accompanying drawings.

[0042] See also Figures 1 to 3 , Figure 1 is an exploded perspective view of a horizontal linear vibration motor according to the present invention; Figure 2 A longitudinal sectional view of a horizontal linear vibration motor according to the present invention; Figure 3 is a cross-sectional view of a horizontal linear vibration motor according to the present invention.

[0043] The present invention provides a horizontal linear vibration motor, which includes a bracket (BR); a flexible printed circuit board (FPCB), which is formed on the upper part of the bracket; a stopper 100, which fixes a yoke plate 300 at the original position on the upper part of the flexible printed circuit board to prevent deformation of a spring 500 caused by impact; a coil (CO), which generates a vibration signal according to an electromagnetic field generated by contact with the flexible printed circuit board; a transmission shaft 200, both ends of which are inserted into the coil in an exposed manner, so as to concentrate the internal electromagnetic field and make the yoke plate 300 The spacing is maintained; the yoke plates 300 are respectively clamped on both sides of the transmission shaft 200, and the lower ends are fixed to the bracket; the magnet 400 acts on the magnetic field of the coil to cause horizontal vibration on the left and right sides of the weight part; the magnetic plate concentrates and fixes the magnetic field of the magnet; the weight part fixes the magnetic plate and generates vibration by weight, thereby connecting with the spring 500 to determine the resonant frequency; the spring 500 amplifies the vibration of the weight part, is connected to the inner end to determine the resonant frequency, and the outer end is connected to the inner side of the box part (CA); the box part is combined with the bracket.

[0044] The weight part has a quadrilateral space part (WH) at the center of a weight part body (WB) composed of a hexahedron, and magnet plate rubbing grooves (WI) are respectively provided on the outer contour of the space part.

[0045] The weight body (WB) has spring pressing portions (WP) at both end portions in the vibration direction.

[0046] Reference Figure 4 ,, Figure 4 This is a diagram showing a state in which a yoke plate is coupled to an upper portion of a bracket via a stopper rod in a horizontal linear vibration motor according to the present invention.

[0047] The stopper rod 100 has a stopper rod main body 110 of a flat shape with right squares and formed of a non-magnetic body, and has assembly grooves 120 at both ends thereof. The assembly grooves 120 have any one of a semicircular, elliptical, and polygonal shape. In the assembly grooves 120, a portion spaced inwardly at a predetermined interval is formed with a spring protection protrusion 130 protruding upward, thereby preventing the spring 500 from being deformed due to the impact of the weight portion. The central portion of the stopper rod main body 110 includes a yoke plate fixing groove 140. At this time, the yoke plate fixing groove 140 is configured to have a guide shape introduced inwardly from the central portion of the stopper rod main body 110, and a support piece 141 is formed protruding outwardly inside the guide shape.

[0048] The coil has a transmission shaft coupling groove (JH) in the center, and the transmission shaft 200 has coupling bosses 220 at both side ends of the transmission shaft body 210, so that a certain distance is always maintained with the yoke plate 300.

[0049] The yoke plate 300 has a boss coupling hole 310 in the center, so that the coupling boss 220 of the transmission shaft 200 is inserted, so that it can be supported in a stable state, and a plate support piece 320 is protruded from the lower part of the yoke plate 300. At this time, the transmission shaft 200 and the yoke plate 300 are preferably made of ferromagnetic body.

[0050] Reference Figure 5 , Figure 5 A cross-sectional view showing an arrangement of magnets in which a yoke plate is bonded to both sides of a transmission shaft sandwiching a coil and a magnet plate is bonded around the yoke plate in a horizontal linear vibration motor according to the present invention.

[0051] The magnet 400 is constructed such that a first magnet component 410 having N poles and S poles arranged from the inside to the outside at a specified interval from the other end portion of the axial direction of the transmission shaft 200 is surrounded by a first magnet plate (MP1), and a second magnet component 430 having N poles and S poles arranged from the inside to the outside at a specified interval from the end portion of one side in the axial direction is surrounded by a second magnet plate (MP2).

[0052] The magnet 400 is constructed such that, in the axial direction of the transmission shaft 200, on the back side of the coil at a right angle, a third magnet component 450 having S poles and N poles arranged from the inside to the outside at a specified interval from the coil is surrounded by a third magnet plate (MP3); in the axial direction of the transmission shaft 200, on the front side of the coil at a right angle, a fourth magnet component 470 having S poles and N poles arranged from the inside to the outside at a specified interval from the coil is surrounded by a fourth magnet plate (MP4), thereby generating four rotating magnetic fields with the center as a reference.

[0053] Only any one surface of the first magnet plate, the second magnet plate, the third magnet plate and the fourth magnet plate is in an open guiding shape, so that the outer sides of the first magnet component 410, the second magnet component 430, the third magnet component 450 and the fourth magnet component 470 are surrounded, so that the magnetic field leaking to the outside is concentrated in the direction of the shielded middle yoke plate 300.

[0054] Reference Figure 6 , Figure 6 The horizontal linear vibration motor according to the present invention is a longitudinal cross-sectional view showing various forms of coils.

[0055] The coil is as Figure 6 As shown on the left side of the figure, the center has a circular transmission shaft coupling groove (JH), and the transmission shaft 200 has a shape coupled to a circular transmission shaft body 210. In addition to this circular shape, as shown in FIG. Figure 6 As shown on the right side of , the transmission shaft coupling hole may have a square shape in the center, or the transmission shaft 200 may have a square shape.

[0056] Reference Figure 7 , Figure 7 A front view of a spring is shown in the horizontal linear vibration motor according to the present invention.

[0057] The spring 500 has an upper and lower portion of a spring body 510 in a vertical rectangular shape, which are respectively extended toward the inner side of the outer box portion to form an upper outer spring arm 520 and a lower outer spring arm 520', and the ends of the upper outer spring arm 520 and the lower outer spring arm 520' are respectively bent inward to form an upper bent piece 530 and a lower bent piece 530' to have a rotational shape.

[0058] The ends of the upper curved piece 530 and the lower curved piece 530 ′ are extended toward the spring pressing portion of the weight portion to form an upper inner spring arm 540 and a lower inner spring arm 540 ′, respectively.

[0059] The spring body 510 has a first support portion 550 on its inner side, and the upper inner spring arm 540 and the lower inner spring arm 540 ′ have second support portions 560 and 560 ′ on their inner sides.

[0060] The first support portion 550 is formed to protrude by a predetermined height H higher than the upper end portion of the spring body 510 , so as to maintain a certain height during assembly.

[0061] Reference Figures 8a to 8c , Figure 8a A diagram showing the attractive force and repulsive force formed according to the electromagnetic field distribution in the horizontal linear vibration motor according to the present invention; Figure 8bA diagram showing the direction of a magnetic field in a horizontal linear vibration motor according to the present invention; Figure 8c A comparison diagram showing electromagnetic field distribution in the horizontal linear vibration motor according to the present invention with and without a magnet plate is shown.

[0062] Figure 8a A diagram showing the attractive force and repulsive force according to the electromagnetic field distribution in the horizontal linear vibration motor of the present invention acts on both sides of the transmission shaft 200 and on both sides of the length direction of the yoke plate 300. Figure 8b In the horizontal linear vibration motor of the present invention, it can be known that the direction of the magnetic field is formed. Figure 8c In the horizontal linear vibration motor of the present invention, it can be seen that the magnetic field leaking to the outside is shielded and the magnetic field is concentrated in the direction of the yoke plate 300 depending on the presence or absence of the magnet plate.

[0063] Reference Fig. 9 , Fig. 9 FIG. 4 is a comparison diagram of response characteristics of the horizontal linear vibration motor according to the present invention and the existing horizontal vibration motor.

[0064] like Fig. 9 As shown, the response measurement value r2 of the existing horizontal vibration motor is 0~100 [mSec], and f2 is 300~483 [mSec]. The response measurement value R1 of the horizontal linear vibration motor of the present invention is 0~55 [mSec], and F1 is 300~363 [mSec]. Its response characteristics are improved by more than 2 times.

[0065] Reference Fig.10 , Fig.10 FIG. 4 is a cross-sectional view of a horizontal linear vibration motor according to another embodiment of the present invention.

[0066] like Fig.10 As shown, according to the horizontal linear vibration motor of the present invention, there are shock absorbers (DP) in the space between the two side ends of the transmission shaft 200 and the magnet 400 and in the space between the central inner side and the inner sides of the two side ends of the spring 500, so that the response characteristics can be further improved.

[0067] Reference Fig.11 , Fig.11 FIG. 4 is a cross-sectional view of a horizontal linear vibration motor according to another embodiment of the present invention.

[0068] According to the horizontal linear vibration motor of the present invention, Fig.11 As shown, magnetic fluid (MF) is provided on both sides of the yoke plate 300 and in the space between the magnet 400 and the magnet plate, so that the response characteristics can be further improved.

[0069] The present invention has been described above based on the drawings, but this is merely an example, and various substitutions, deformations, and changes may be made without departing from the technical concept of the present invention, and the present invention is not limited to the aforementioned embodiments and drawings.

Claims

1. A horizontal linear vibration motor, comprising a bracket; a flexible printed circuit board, which is formed toward the upper part of the bracket; a coil, which generates a vibration signal according to the electromagnetic field generated by contact with the flexible printed circuit board; a transmission shaft (200), both ends of which are inserted into the coil in an exposed manner, so that the internal electromagnetic field is concentrated and the spacing of the yoke plates (300) is maintained; the yoke plates (300) are respectively clamped on both sides of the transmission shaft (200), and the lower ends are fixed to the bracket; a magnet (400) acts on the magnetic field of the coil so that the left and right sides of the weight part are Generate horizontal vibration; a magnet plate, so that the magnetic field of the magnet (400) is concentrated and fixed; a weight portion, fixes the magnet plate, generates vibration by weight, and is connected to the spring (500) to determine the resonance frequency; the spring (500) amplifies the vibration of the weight portion, is connected to the inner end to determine the resonance frequency, and the outer end is connected to the inner side of the box portion (CA); the box portion is combined with the bracket; a stopper rod (100) fixes the yoke plate (300) in the original position toward the upper part of the flexible printed circuit board to prevent deformation of the spring (500) caused by impact; It is characterized in that A stopper rod (100) is formed of a non-magnetic body in the form of a rectangular flat plate, and has assembly grooves (120) at both ends of the stopper rod body (110), wherein the assembly grooves (120) have any one of a semicircular, elliptical and polygonal shape; a yoke plate fixing groove (140) is formed by a guide shape introduced inward from the central part of the stopper rod body (110), and a support piece (141) is formed protruding outward from the inside of the guide shape; a spring protection protrusion (130) is formed in the portion of the assembly groove (120) spaced inwardly at a predetermined interval, thereby preventing the spring (500) from being deformed due to the impact of the weight part; The coil is constructed such that a circular or square drive shaft coupling hole is formed in the center and has a circular or square shape; the drive shaft (200) and the circular or square drive shaft body (210) are respectively provided with coupling bosses (220) at both ends for maintaining a specified spacing with the yoke plate (300); the yoke plate (300) is provided with a boss coupling hole (310) in the center for inserting the coupling boss (220) of the drive shaft (200), and a plate support sheet (320) is formed protrudingly at the bottom; the drive shaft (200) and the yoke plate (300) are made of a ferromagnetic body; The magnet (400) is constructed such that a first magnet component (410) having N poles and S poles arranged from the inside to the outside at a predetermined interval from the other end of the axial direction of the transmission shaft (200) is surrounded by a first magnet plate (MP1), and a second magnet component (430) having N poles and S poles arranged from the inside to the outside at a predetermined interval from the end of one side of the axial direction is surrounded by a second magnet plate (MP2), and in the axial direction of the transmission shaft (200), a line extending at a right angle to the ... On the back of the coil, a third magnet component (450) having S poles and N poles arranged from the inside to the outside at a specified interval is surrounded by a third magnet plate (MP3). In the axial direction of the transmission shaft (200), in front of the coil at a right angle, a fourth magnet component (470) having S poles and N poles arranged from the inside to the outside at a specified interval is surrounded by a fourth magnet plate (MP4), thereby generating four rotating magnetic fields with the center as a reference.

2. The horizontal linear vibration motor according to claim 1, characterized in that: Only any one surface of the first magnet plate, the second magnet plate, the third magnet plate, and the fourth magnet plate is in an open guiding form, so that the outer sides of the first magnet component (410), the second magnet component (430), the third magnet component (450), and the fourth magnet component (470) are surrounded, so that the magnetic field leaking to the outside is concentrated in the direction of the shielded middle yoke plate (300).

3. The horizontal linear vibration motor according to claim 1, characterized in that: The weight part has a quadrilateral space at the center of a weight part body formed of a hexahedron, and magnet plate rubbing grooves are respectively provided on the outer contour of the space.

4. The horizontal linear vibration motor according to claim 1, characterized in that: The spring (500) has a spring body (510) in a vertical rectangular shape; the upper and lower parts of the spring body (510) are respectively extended toward the inner side of the outer box portion to form an upper outer spring arm (520) and a lower outer spring arm (520'); the ends of the upper outer spring arm (520) and the lower outer spring arm (520') are respectively bent inward to form an upper bent piece (530) and a lower bent piece (530'), so as to have The spring body (510) has a rotating shape; the ends of the upper curved piece (530) and the lower curved piece (530') are respectively extended toward the spring pressure part of the weight part to form an upper inner spring arm (540) and a lower inner spring arm (540'); the inner side of the spring body (510) has a first support part (550), and the inner sides of the ends of the upper inner spring arm (540) and the lower inner spring arm (540') have second support parts (560) and (560').

5. The horizontal linear vibration motor according to claim 4, characterized in that: The first support portion (550) is formed to protrude by a predetermined height (H) higher than the upper end of the spring body (510), so as to maintain a certain height during assembly.

6. The horizontal linear vibration motor according to claim 1, characterized in that: The space between the two side ends of the transmission shaft (200) and the magnet (400) and the space between the central inner side and the inner sides of the two side ends of the spring (500) are respectively provided with a shock absorber (DP), thereby further improving the response characteristics.

7. The horizontal linear vibration motor according to claim 1, characterized in that: Magnetic fluid is provided on both sides of the yoke plate (300) and in the space between the magnet (400) and the magnet plate.

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