CN212323964U

CN212323964U - Horizontal linear vibration motor

Info

Publication number: CN212323964U
Application number: CN202020288638.0U
Authority: CN
Inventors: 姜振善; 崔教锡; 朴贤浚; 金华植; 孙仁赞
Original assignee: Bluecom Co ltd
Current assignee: Bluecom Co ltd
Priority date: 2019-06-07
Filing date: 2020-03-11
Publication date: 2021-01-08
Anticipated expiration: 2030-03-11
Also published as: KR102049343B1; CN111786529A

Abstract

The present invention relates to a horizontal linear vibration motor, and more particularly, to a horizontal linear vibration motor, in which a rectangular plug is formed of a non-magnetic material in a flat plate shape, and a groove portion for assembling is formed at both side end portions of a plug main body, and the groove portion for assembling has any one shape of a semicircle, an ellipse, and a polygon; a yoke plate fixing groove part is formed by a guiding form led in from the central part of the stopper rod main body to the inner side, and a supporting piece is formed by projecting from the inner side of the guiding form to the outer side; the vibration motor is driven horizontally, so that the resonance noise of the camera can be improved, the concentration of the intermediate electromagnetic field can be maximized, and the vibration response time can be improved.

Description

Horizontal linear vibration motor

Technical Field

The utility model relates to a horizontal linear vibration motor especially relates to a horizontal linear vibration motor for vibrating motor horizontal drive, thereby can improve the resonance noise of camera, with the concentration maximization of middle electromagnetic field, thereby can improve vibration response time.

Background

In general, with recent rapid development of wireless communication technology, portable communication devices have been increasingly downsized and light-weighted, and with such a 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.

Documents of the prior art

Patent document

(patent document 1) laid-open patent publication No. 10-2010-0073301 (2010.07.01.)

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model relates to a solve the problem that exists among the prior art and propose, its aim at provides a horizontal linear vibration motor to can improve the resonance noise of camera, with the concentration maximization of middle electromagnetic field, thereby can improve vibration response time.

Technical scheme

In order to accomplish the above object, the present invention provides a horizontal linear vibration motor, which includes a Bracket (BR); a Flexible Printed Circuit Board (FPCB) formed toward an upper portion of the holder; a stopper (stopper)100 for fixing the yoke plate 300 at an original position to an upper portion of the flexible printed circuit board to prevent deformation of the spring 500 due to an impact; a Coil (CO) generating a vibration signal according to an electromagnetic field generated by contact with the flexible printed circuit board; a driving shaft 200 having both side ends inserted into the coils in an exposed manner, thereby concentrating an internal electromagnetic field and allowing the interval of the yoke plates 300 to be maintained; yoke plates 300 respectively clamped at both sides of the driving shaft 200, the lower end portions of which are fixed to the bracket; a magnet 400 which acts on the magnetic field of the coil to horizontally vibrate the weight portion to the left and right; a magnet plate that fixes the magnetic field of the magnet in a concentrated manner; a weight part which is fixed to the magnet plate, vibrates by the weight, and is connected to the spring 500 to determine a resonance frequency; a spring 500 for amplifying vibration of the weight part, connected to an inner end to determine a resonance frequency, and connected to an inner side of the box part (CA); a box part combined with the bracket. This maximizes the concentration of the electromagnetic field, and improves the vibration response time, thereby improving the resonance noise of the intermediate camera.

Effect of the utility model

The utility model provides a horizontal linear vibrating motor for vibrating motor horizontal drive, thereby can improve the resonance noise of camera, with the concentration maximization of middle electromagnetic field, thereby can improve vibration response time.

Drawings

Fig. 1 is an exploded perspective view of a horizontal linear vibration motor according to the present invention.

Fig. 2 is a longitudinal sectional view of a horizontal linear vibration motor according to the present invention.

Fig. 3 is a cross-sectional view of a horizontal linear vibration motor according to the present invention.

Fig. 4 is a view showing a state in which a yoke plate is coupled to an upper portion of a bracket through a stopper rod in a horizontal linear vibration motor according to the present invention.

Fig. 5 is a cross-sectional view showing an arrangement of magnets in which yoke plates are coupled to both sides of a transmission shaft sandwiching a coil and a magnet plate is coupled around the yoke plates, in a horizontal linear vibration motor according to the present invention.

Fig. 6 is a longitudinal sectional view showing various forms of coils in the horizontal linear vibration motor according to the present invention.

Fig. 7 is a front view showing a spring in a horizontal linear vibration motor according to the present invention.

Fig. 8a is a view illustrating an attractive force and a repulsive force formed according to electromagnetic field distribution in a horizontal linear vibration motor according to the present invention; fig. 8b is a view showing a magnetic field direction in the horizontal linear vibration motor according to the present invention; fig. 8c is a comparative diagram showing the distribution of the electromagnetic field in the presence of the magnet plate in the horizontal linear vibration motor according to the present invention.

Fig. 9 is a graph comparing response characteristics of a horizontal linear vibration motor according to the present invention and a conventional horizontal vibration motor.

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

Fig. 11 is a cross-sectional view of a horizontal linear vibration motor according to still another embodiment of the present invention.

Description of the reference numerals

100: stopper rod 200: transmission shaft

300 yoke plate 400 magnet

500: spring BR: bracket

CA case part CO coil

MP magnet plate PCB flexible printed circuit board

WT weight portion

Detailed Description

Hereinafter, the present invention may be variously changed 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 to enable a person skilled in the art to understand the invention in more detail, embodiments of the invention are provided. Therefore, the forms of the respective elements shown in the drawings may be exaggerated to more clearly illustrate the forms, and a detailed description thereof will be omitted when it is considered that a detailed description of a related known technology may obscure the gist of 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.

In the present invention, the terms "including" or "having" are used to indicate the presence of the features, numerals, steps, actions, components, parts, or combinations thereof described in the specification, and it should be understood that the presence or possibility of addition of one or more other features, numerals, steps, actions, components, parts, or combinations thereof is not excluded in advance.

First, the present invention relates to a horizontal linear vibration motor, which includes at least one 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 case.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, fig. 1 is an exploded perspective view of a horizontal linear vibration motor according to the present invention; fig. 2 is a longitudinal sectional view of a horizontal linear vibration motor according to the present invention; fig. 3 is a cross-sectional view of a horizontal linear vibration motor according to the present invention.

The utility model provides a horizontal linear vibration motor, which comprises a Bracket (BR); a Flexible Printed Circuit Board (FPCB) formed toward an upper portion of the holder; a stopper (stopper)100 for fixing the yoke plate 300 at an original position to an upper portion of the flexible printed circuit board to prevent deformation of the spring 500 due to an impact; a Coil (CO) generating a vibration signal according to an electromagnetic field generated by contact with the flexible printed circuit board; a driving shaft 200 having both side ends inserted into the coils in an exposed manner, thereby concentrating an internal electromagnetic field and allowing the interval of the yoke plates 300 to be maintained; yoke plates 300 respectively clamped at both sides of the driving shaft 200, the lower end portions of which are fixed to the bracket; a magnet 400 which acts on the magnetic field of the coil to horizontally vibrate the weight portion to the left and right; a magnet plate that fixes the magnetic field of the magnet in a concentrated manner; a weight part which is fixed to the magnet plate, vibrates by the weight, and is connected to the spring 500 to determine a resonance frequency; a spring 500 for amplifying vibration of the weight part, connected to an inner end to determine a resonance frequency, and connected to an inner side of the box part (CA); a box part combined with the bracket.

The weight part is provided with a rectangular space part (WH) at the center of a weight part main body (WB) composed of a hexahedron, and the outline of the space part is respectively provided with a magnet board inserting groove part (WI).

The weight section main body (WB) is provided with spring pressing sections (WP) at both side ends in the direction of vibration.

Referring to fig. 4, fig. 4 is a view showing a state in which a yoke plate is coupled to an upper portion of a bracket by a stopper rod in a horizontal linear vibration motor according to the present invention.

The stopper 100 has a non-magnetic body, and has an assembly groove 120 at both ends of a flat stopper body 110 having four straight corners, the assembly groove 120 having any one of a semicircular shape, an elliptical shape, and a polygonal shape, and a spring protection protrusion 130 is formed to protrude upward at a portion spaced inward by a predetermined distance in the assembly groove 120, so that it is possible to prevent deformation of a spring 500 due to impact of a weight portion, and a yoke plate fixing groove 140 is formed at a central portion of the stopper body 110. In this case, the yoke plate fixing groove 140 has a guide form drawn inward from the central portion of the stopper rod body 110, and a support piece 141 is formed to protrude outward inside the guide form.

The coil has a shaft coupling groove (JH) at the center, and the shaft 200 has coupling bosses 220 at both side end portions of a shaft body 210, respectively, so as to always maintain a certain interval from the yoke plate 300.

The yoke plate 300 has a boss coupling hole 310 at the center thereof so that the coupling boss 220 of the driving shaft 200 is inserted therein to be supported in a stable state, and a plate supporting plate 320 is protrudingly formed at the lower portion of the yoke plate 300. In this case, the transmission shaft 200 and the yoke plate 300 are preferably made of a ferromagnetic material.

Referring to fig. 5, fig. 5 is a cross-sectional view showing an arrangement of magnets in which yoke plates are coupled to both sides of a transmission shaft sandwiching a coil and a magnet plate is coupled around the yoke plates, in a horizontal linear vibration motor according to the present invention.

The magnet 400 is configured such that a first magnet member 410 having N and S poles arranged from the inside to the outside at predetermined intervals from the other end in the axial direction of the propeller shaft 200 is surrounded by a first magnet plate (MP1), and a second magnet member 430 having N and S poles arranged from the inside to the outside at predetermined intervals from one end in the axial direction is surrounded by a second magnet plate (MP 2).

The magnet 400 is configured such that a third magnet part 450 having S-poles and N-poles arranged at predetermined pitch intervals from the coil toward the back side of the coil perpendicular to the axial direction of the propeller shaft 200 from the inside to the outside is surrounded by a third magnet plate (MP3), and a fourth magnet part 470 having S-poles and N-poles arranged at predetermined pitch intervals from the coil toward the front side of the coil perpendicular to the axial direction of the propeller shaft 200 from the inside to the outside is surrounded by a fourth magnet plate (MP4), thereby generating 4 rotating magnetic fields with respect to the center.

Only one of the first, second, third, and fourth magnet plates is in an open guide form, so that the outer sides of the first, second, third, and

fourth magnet members

410, 430, 450, and 470 are surrounded, and a magnetic field leaking to the outside is concentrated in the direction of the shielded intermediate yoke plate 300.

Referring to fig. 6, fig. 6 is a longitudinal sectional view showing various forms of coils in the horizontal linear vibration motor according to the present invention.

The coil may have a circular shape of a shaft coupling hole (JH) at the center as shown in the left side of fig. 6, and the shaft 200 may be coupled to a circular shape of the shaft body 210, but may have a shaft coupling hole having a rectangular shape at the center as shown in the right side of fig. 6, or the shaft 200 may have a rectangular shape.

Referring to fig. 7, fig. 7 is a front view illustrating a spring in a horizontal linear vibration motor according to the present invention.

The spring 500 has an upper portion and a lower portion of a vertical rectangular spring body 510, and an upper outer spring arm 520 and a lower outer spring arm 520' are formed to extend toward an inner surface of an outer case portion, respectively, and ends of the upper outer spring arm 520 and the lower outer spring arm 520' are formed to be bent inward to have an upper bent piece 530 and a lower bent piece 530', respectively, so as to have a turning form.

Ends of the upper and lower bent pieces 530 and 530 'are extended toward the spring pressurization part of the weight part to form upper and lower inner spring arms 540 and 540', respectively.

The inner side of the spring body 510 has a first support 550, and the inner ends of the upper inner spring arm 540 and the lower inner spring arm 540 'have second supports 560 and 560'.

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

Referring to fig. 8a to 8c, fig. 8a is a view illustrating an attractive force and a repulsive force formed according to electromagnetic field distribution in a horizontal linear vibration motor according to the present invention; fig. 8b is a view showing a magnetic field direction in the horizontal linear vibration motor according to the present invention; fig. 8c is a comparative diagram showing the distribution of the electromagnetic field in the presence of the magnet plate in the horizontal linear vibration motor according to the present invention.

Fig. 8a is a view showing an attractive force and a repulsive force distributed according to an electromagnetic field in the horizontal linear vibration motor of the present invention, which acts on both sides of the transmission shaft 200 in the longitudinal direction of the yoke plate 300. Fig. 8b shows the direction of the magnetic field formed in the horizontal linear vibration motor of the present invention, and fig. 8c shows the magnetic field leaked to the outside according to the existence of the magnet plate in the horizontal linear vibration motor of the present invention, and the magnetic field is concentrated toward the yoke plate 300.

Referring to fig. 9, fig. 9 is a graph comparing response characteristics of a horizontal linear vibration motor according to the present invention and a conventional horizontal vibration motor.

As shown in fig. 9, the response measurement value R2 of the conventional horizontal vibration motor is 0 to 100[ mSec ], F2 is 300 to 483[ mSec ], the response measurement value R1 of the horizontal linear vibration motor of the present invention is 0 to 55[ mSec ], F1 is 300 to 363[ mSec ], and the response characteristic is improved by about 2 times or more.

Referring to fig. 10, fig. 10 is a cross-sectional view of a horizontal linear vibration motor according to another embodiment of the present invention.

As shown in fig. 10, according to the horizontal linear vibration motor of the present invention, the shock absorbers (DP) are respectively provided in the spaces between the both side ends of the transmission shaft 200 and the magnet 400 and the spaces between the central inner side and the both side ends inner side of the spring 500, so that the response characteristic can be more improved.

Referring to fig. 11, fig. 11 is a cross-sectional view of a horizontal linear vibration motor according to still another embodiment of the present invention.

According to the horizontal linear vibration motor of the present invention, as shown in fig. 11, the Magnetic Fluid (MF) is provided in the space between both sides of the yoke plate 300 and the magnet 400 and the magnet plate, so that the response characteristic can be more improved.

The present invention has been described above with reference to the accompanying drawings, but these are merely examples, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention, and the present invention is not limited to the above-described embodiments and the accompanying drawings.

Claims

1. A horizontal linear vibration motor includes a bracket; a flexible printed circuit board formed toward an upper portion of the holder; a coil generating a vibration signal according to an electromagnetic field generated by contact with the flexible printed circuit board; a transmission shaft (200) having both side ends inserted into the coils in an exposed manner, thereby concentrating an internal electromagnetic field and maintaining a pitch of the yoke plates (300); yoke plates (300) respectively clamped at both sides of the transmission shaft (200), the lower end parts of which are fixed on the bracket; a magnet (400) which acts on the magnetic field of the coil to horizontally vibrate the weight portion to the left and right; a magnet plate that fixes the magnetic field of the magnet (400) in a concentrated manner; a weight part which is fixed on the magnet plate, generates vibration by using weight, is connected with the spring (500) and determines resonance frequency; a spring (500) for amplifying the vibration of the weight part, connected with the inner end to determine the resonance frequency, and connected with the inner side of the box part (CA); a box part combined with the bracket; a stopper (100) for fixing the yoke plate (300) at a home position to an upper portion of the flexible printed circuit board and preventing deformation of the spring (500) due to an impact;

the stopper rod (100) is formed by a rectangular flat plate-shaped non-magnetic body, assembling groove parts (120) are arranged at two side end parts of a stopper rod main body (110), and the assembling groove parts (120) have any one of a semicircular shape, an elliptic shape and a polygonal shape; a yoke plate fixing groove part (140) formed in a guiding shape from the central part of the stopper rod main body (110) to the inner side, and a supporting piece (141) formed in the guiding shape to the outer side in a protruding way; the middle part of the assembly groove part (120) which is spaced from the inner side by a specified distance is provided with a spring protection convex part (130) which is formed by protruding towards the upper part, thereby preventing the deformation of the spring (500) caused by the impact of the weight part.

2. The horizontal linear vibration motor of claim 1, wherein the coil is formed with a transmission shaft coupling hole having a circular or rectangular shape at a center thereof, and the transmission shaft coupling hole is formed with a circular or rectangular shape; in the transmission shaft (200), both side end portions of a transmission shaft main body (210) having a circular or rectangular shape are respectively provided with a coupling boss (220) for maintaining a predetermined interval with the yoke plate (300), a boss coupling hole (310) into which the coupling boss (220) of the transmission shaft (200) is inserted is provided at the center of the yoke plate (300), a plate support piece (320) is formed to protrude from the lower portion, and the transmission shaft (200) and the yoke plate (300) are formed of a ferromagnetic material.

3. The horizontal linear vibration motor according to claim 1, wherein the magnet (400) is configured such that a first magnet member (410) having N-poles and S-poles arranged from inside to outside is surrounded by a first magnet plate (MP1) at predetermined intervals from the other end in the axial direction of the drive shaft (200), a second magnet member (430) having N-poles and S-poles arranged from inside to outside at predetermined intervals from one end in the axial direction is surrounded by a second magnet plate (MP2), a third magnet member (450) having S-poles and N-poles arranged from inside to outside at predetermined intervals from the coil is surrounded by a third magnet plate (MP3) at right angles to the back of the coil at right angles in the axial direction of the drive shaft (200), and the magnet member (400) is configured such that the magnet member (450) is surrounded by a third magnet plate (MP3) at right angles to the front of the coil at right angles in the axial direction of the drive shaft (200), a fourth magnet member (470) having S and N poles arranged from the inside to the outside at predetermined pitch intervals from the coil is surrounded by a fourth magnet plate (MP4), and generates 4 rotating magnetic fields with respect to the center.

4. The horizontal linear vibration motor according to claim 3, wherein only one of the first, second, third, and fourth magnet plates is in an open guide form, so that the outer sides of the first, second, third, and fourth magnet parts (410, 430, 450, and 470) are enclosed, and a magnetic field leaking to the outside is concentrated toward the shielded middle yoke plate (300).

5. The horizontal linear vibration motor according to claim 1, wherein the weight portion has a rectangular space portion at the center of the weight portion body formed of a hexahedron, and a magnet plate fitting groove portion is provided at an outer contour of each space portion.

6. The horizontal linear vibration motor of claim 1, wherein the spring (500) has a spring body (510) of a vertical rectangular form; upper and lower outer spring arms (520, 520') are formed on the upper and lower portions of the spring main body (510) so as to extend toward the inner surface of the outer box portion, and the ends of the upper and lower outer spring arms (520, 520') are respectively bent inward to form upper and lower bent pieces (530, 530') so as to have a turning form; the ends of the upper bending piece (530) and the lower bending piece (530') are respectively formed with an upper inner spring arm (540) and a lower inner spring arm (540') extending toward the spring pressing portion of the weight portion; the inner side of the spring main body (510) has a first support part (550), and the inner ends of the upper inner spring arm (540) and the lower inner spring arm (540') have second support parts (560) and (560').

7. The horizontal linear vibration motor of claim 6, wherein the first supporting portion (550) is formed to protrude higher than the upper end portion of the spring main body (510) by a predetermined height (H) so that a certain height is maintained at the time of assembly.

8. The horizontal linear vibration motor of claim 1, wherein a space between both side ends of the driving shaft (200) and the magnet (400) and a space between an inner side of a center and inner sides of both side ends of the spring (500) have Dampers (DP), respectively, so that response characteristics can be more improved.

9. The horizontal linear vibration motor according to claim 1, wherein a magnetic fluid is provided in spaces between both sides of the yoke plate (300) and the magnets (400) and the magnet plates.