阅读说明：本技术 一种动磁式多向振动线性马达结构及其实现方法 (Moving-magnet type multidirectional vibration linear motor structure and implementation method thereof ) 是由 黄浩静 王欣欣 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种动磁式多向振动线性马达结构,包括支撑架和外壳体,外壳体的内部连接有定子组件,支撑架的内部设有振动组件,定子组件包括柔性电路板和线圈,其中,柔性电路板的两侧分别连接有线圈,线圈与柔性电路板电性连接,振动组件包括振子和磁钢组,其中,振子的两侧分别通过弹簧与支撑架连接,振子的两端分别设有磁钢组；本发明还公开了一种动磁式多向振动线性马达结构的实现方法。本发明根据不同的信号输入,通电线圈在磁钢产生的磁场中产生不同频段和大小的驱动力,产生不同的振动波形,提供不同的振动体验。(The invention discloses a moving-magnet type multidirectional vibration linear motor structure which comprises a supporting frame and an outer shell, wherein a stator assembly is connected inside the outer shell, a vibration assembly is arranged inside the supporting frame, the stator assembly comprises a flexible circuit board and coils, the two sides of the flexible circuit board are respectively connected with the coils, the coils are electrically connected with the flexible circuit board, the vibration assembly comprises a vibrator and a magnetic steel group, the two sides of the vibrator are respectively connected with the supporting frame through springs, and the two ends of the vibrator are respectively provided with the magnetic steel group; the invention also discloses a realization method of the moving-magnet type multidirectional vibration linear motor structure. According to different signal inputs, the electrified coil generates driving forces with different frequency bands and sizes in a magnetic field generated by the magnetic steel, so that different vibration waveforms are generated, and different vibration experiences are provided.)

1. The utility model provides a multidirectional vibration linear motor structure of moving-magnet formula, includes support frame (7) and shell body (15), its characterized in that: the internal connection of shell body (15) has stator module (13), the inside of support frame (7) is equipped with vibration subassembly (14), stator module (13) are including flexible circuit board (12) and coil (11), wherein, the both sides of flexible circuit board (12) are connected with coil (11) respectively, coil (11) and flexible circuit board (12) electric connection, vibration subassembly (14) are including oscillator (6) and magnet steel group (8), wherein, the both sides of oscillator (6) are connected with support frame (7) through spring (5) respectively, the both ends of oscillator (6) are equipped with magnet steel group (8) respectively, stator module (13) are located the top of vibration subassembly (14).

2. A moving magnet multi-directional vibration linear motor structure as claimed in claim 1, wherein: an iron core (10) is arranged in the coil (11).

3. A moving magnet multi-directional vibration linear motor structure as claimed in claim 2, wherein: the outer shell (15) comprises an upper cover plate (1) and two side cover plates (9), wherein the two side cover plates (9) are respectively located on two sides of the upper cover plate (1), and the flexible circuit board (12) is respectively connected with the upper cover plate (1) and the two side cover plates (9).

4. A moving magnet multi-directional vibration linear motor structure as claimed in claim 3, wherein: the two ends of the vibrator (6) are respectively provided with a plastic block (3), and the magnetic steel group (8) is embedded in the inner side of the plastic block (3).

5. The moving magnet type multidirectional vibration linear motor structure according to claim 4, wherein: one side of the plastic block (3) close to the vibrator (6) is connected with a pole piece (2).

6. A moving magnet multi-directional vibration linear motor structure as claimed in claim 5, wherein: two outer side flat ends of the spring (5) are respectively fixedly connected with the vibrator (6) and the support frame (7), and two inner side flat ends of the spring (5) are respectively connected with a stop block (4).

7. A moving magnet multi-directional vibration linear motor structure as claimed in claim 6, wherein: the upper cover plate (1) and the support frame (7) are respectively provided with a limit block (17) corresponding to the two ends of the vibration component (14).

8. A moving magnet multi-directional vibration linear motor structure as claimed in claim 7, wherein: the upper part of the side edge of the supporting frame (7) is connected with a first positioning block (20), the two sides of the side edge of the supporting frame (7) are respectively provided with a second positioning groove (19), the two sides of the side cover plate (9) are connected with a second positioning block (18) corresponding to the second positioning groove (19), and the two sides of the upper cover plate (1) are provided with a first positioning groove (16) corresponding to the first positioning block (20).

9. The method for realizing a moving-magnet multidirectional vibration linear motor structure according to any one of claims 1 to 8, characterized by comprising the following steps:

a closed cavity is formed by the support frame (7) and the outer shell (15) and accommodates the vibration component (14) inside;

the vibration component (14) comprises a vibrator (6) and a magnetic steel group (8), and the magnetic steel group (8) provides a magnetic field for driving the motor;

a stator assembly (13) is connected inside the outer shell (15), the flexible circuit board (12) and the coil (11) form a circuit, an electric field is formed when the circuit is electrified, and the electric field and the magnetic field interact to drive the motor to vibrate;

and the spring (5) is connected with the support frame (7) and the vibration component (14) to provide elasticity for movement, so that the vibration component (14) reciprocates.

10. The method for realizing a moving-magnet multidirectional vibration linear motor structure according to claim 9, wherein: an iron core (10) is arranged inside the coil (11), the outer shell (15) comprises an upper cover plate (1) and two side cover plates (9), wherein the two side cover plates (9) are respectively positioned at two sides of the upper cover plate (1), the flexible circuit board (12) is respectively connected with the upper cover plate (1) and the two side cover plates (9), two ends of the vibrator (6) are respectively provided with a plastic block (3), a magnetic steel group (8) is embedded in the inner side of the plastic block (3), one side of the plastic block (3) close to the vibrator (6) is connected with a pole piece (2), two outer side flat ends of the spring (5) are respectively fixedly connected with the vibrator (6) and the support frame (7), two inner side flat ends of the spring (5) are respectively connected with a stop block (4), two ends of the upper cover plate (1) and the support frame (7) corresponding to the vibration component (14) are respectively provided with a stop block (17), a first positioning block (20) is connected, second positioning grooves (19) are respectively arranged on two sides of the side edge of the supporting frame (7), second positioning blocks (18) corresponding to the second positioning grooves (19) are connected to two sides of the side cover plate (9), and first positioning grooves (16) corresponding to the first positioning blocks (20) are arranged on two sides of the upper cover plate (1).

Technical Field

The invention belongs to the technical field of linear motors, and particularly relates to a moving-magnet type multidirectional vibration linear motor structure and an implementation method thereof.

Background

Along with the popularization of large front-end groups and large users in the fields of mobile phone application ends, intelligent wearing and the like, the motor technology has long-term development and is mature day by day. With the continuous maturity of emerging fields such as immersive game machines, AR, VR, etc., the requirement for tactile sensation becomes more varied and complicated.

With the increasing experience demands of users, motors are used as touch sources of electronic products, and the structure of the motors is changed over the ground. From cylindrical motors, to flat motors, to linear motors, the tactile sensation provided is increasingly varied and refined. In high-end equipment, linear motors are currently used substantially in full line for experience. The linear motors are classified into a Z-axis linear motor (the vibration direction is the thickness direction) and a horizontal linear motor (the vibration direction is the non-thickness direction) in the vibration direction. The linear motor has a single vibration direction, only one main driving working frequency point for application and one application bandwidth. With the popularization of hand-held AR & VR feedback devices and game machines, unidirectional linear motors with single dominant frequency are far from being satisfied, and linear motors with multiple vibration directions and multiple dominant frequency driving have become a technical problem to be overcome.

The motor is divided into two structures of a moving magnet and a moving coil according to the state of the rotor. As the name suggests, the moving coil structure is that the coil is on the rotor and participates in the movement, while the permanent magnet providing the magnetic field does not participate in the movement and is on the stator; the moving magnetic structure is that the permanent magnet providing the magnetic field is arranged on the rotor and participates in the movement, and the coil is arranged on the stator and does not participate in the movement. In the moving coil motor, in order to make the current-carrying terminal on the stator smoothly lead the current to the coil on the mover, some specific processing is necessary, and the common scheme is to connect the mover coil and the stator by a flexible circuit board or to connect the mover and the stator by an elastic current-carrying spring. The former scheme has the problems that the flexible circuit board participates in movement, the working sound of the motor is large, the flexible circuit board is broken after long-term working, and the like. The latter scheme has the risks of relatively large resistance of the elastic energizing spring, large occupied space, large process difficulty, open circuit caused by fatigue fracture and the like. No matter which scheme, the technology degree of difficulty is big, and the risk management and control cost is high, so select the moving magnetic structure to have great manufacturability, reliability and economic meaning.

Disclosure of Invention

The present invention is directed to a moving-magnet type multidirectional vibration linear motor structure to solve the above problems. The moving-magnet type multidirectional vibration linear motor structure provided by the invention has the characteristics of realizing the vibration of two main working directions and reducing the motor stop time through electromagnetic damping.

The invention also aims to provide a realization method of the moving magnet type multidirectional vibration linear motor structure.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a move multidirectional vibration linear motor structure of magnetic formula, including support frame and shell body, the internal connection of shell body has stator module, the inside of support frame is equipped with the vibration subassembly, stator module includes flexible circuit board and coil, wherein, flexible circuit board's both sides are connected with the coil respectively, coil and flexible circuit board electric connection, the vibration subassembly includes oscillator and magnet steel group, wherein, the both sides of oscillator are connected with the support frame through the spring respectively, the both ends of oscillator are equipped with magnet steel group respectively, stator module is located the top of vibration subassembly.

In the present invention, an iron core is provided inside the coil.

Further, the outer shell comprises an upper cover plate and two side cover plates, wherein the two side cover plates are respectively positioned at two sides of the upper cover plate, and the flexible circuit board is respectively connected with the upper cover plate and the two side cover plates.

In the invention, two ends of the vibrator are respectively provided with a plastic block, and the magnetic steel group is embedded in the inner side of the plastic block.

In the invention, a pole piece is connected to one side of the plastic block close to the vibrator.

In the invention, two outer flat ends of the spring are respectively and fixedly connected with the vibrator and the support frame, and two inner flat ends of the spring are respectively connected with the stop blocks.

Furthermore, the upper cover plate and the support frame are respectively provided with a limit block at two ends corresponding to the vibration component.

Furthermore, a first positioning block is connected above the side edge of the support frame, second positioning grooves are respectively arranged on two sides of the side edge of the support frame, second positioning blocks corresponding to the second positioning grooves are connected on two sides of the side cover plate, and first positioning grooves corresponding to the first positioning blocks are arranged on two sides of the upper cover plate.

Further, the implementation method of the moving-magnet type multidirectional vibration linear motor structure comprises the following steps:

the first step, the support frame and the outer shell form a closed cavity for accommodating the internal vibration component;

the vibration assembly comprises a vibrator and a magnetic steel group, and the magnetic steel group provides a magnetic field for the motor to drive;

the stator assembly is connected inside the outer shell, the flexible circuit board and the coil form a circuit, an electric field is formed when the circuit is powered on, and the electric field and the magnetic field interact with each other to drive the motor to vibrate;

and the spring is connected with the support frame and the vibration assembly to provide elasticity for movement so that the vibration assembly reciprocates.

In the invention, further, the moving magnet type multidirectional vibration linear motor structure is realized by arranging an iron core in a coil, arranging an outer shell comprising an upper cover plate and two side cover plates, wherein the two side cover plates are respectively positioned at two sides of the upper cover plate, connecting a flexible circuit board with the upper cover plate and the two side cover plates respectively, arranging plastic blocks at two ends of a vibrator respectively, embedding a magnetic steel group in the inner side of the plastic blocks, connecting a pole piece at one side of the plastic blocks close to the vibrator, fixedly connecting two outer flat ends of a spring with the vibrator and a support frame respectively, connecting a stop block at two inner flat ends of the spring respectively, arranging limit blocks at two ends of the upper cover plate and the support frame corresponding to a vibration component respectively, connecting a first positioning block above the side edge of the support frame, arranging second positioning grooves at two sides of the side edge of the support frame respectively, and connecting second positioning blocks corresponding to the, and first positioning grooves corresponding to the first positioning blocks are arranged on two sides of the upper cover plate.

Compared with the prior art, the invention has the beneficial effects that:

1. according to different signal inputs, the electrified coil generates driving forces with different frequency bands and sizes in a magnetic field generated by the magnetic steel to generate different vibration waveforms and provide different vibration experiences, the number of main vibration directions is two, the driving forces can be orthogonally decomposed in the two directions, when the signal frequency is close to a certain direction, the vibration in the direction is excited, and the vibration in the two directions can be coupled in a plane, so that the multidirectional vibration in the plane can be generated;

2. according to the invention, the iron core is arranged in the coil and made of high-permeability materials, after the vibrator moves, the magnetic field of the magnetic steel group continuously cuts the iron core and the coil, and induced electromotive force is generated in the iron core and the coil, so that residual kinetic energy is dissipated as soon as possible in a joule heat mode after power failure, the stopping speed after power failure can be greatly accelerated, and the stopping time of the motor is reduced;

3. the side cover plate is made of magnetic conductive material, and components such as an iron core, a flexible circuit board, a coil and the like are fixed on the side cover plate, so that a working magnetic field is gathered, and the external magnetic flux leakage of the motor is reduced;

4. the plastic block is used for accommodating the magnetic steel group and is used as a limiting structure for mechanical impact tests and working conditions, so that the spring under severe conditions is effectively protected, and the spring is prevented from being damaged;

5. the special shape design of the spring ensures that the spring can realize linear motion in two directions, ensures that the modes corresponding to the two motions are in the first two orders, and avoids the modes except the two linear motion modes from being excited by a driving signal;

6. the support frame is made of a magnetic conductive material, supports the two springs, enables the moving part to be suspended in the air, forms a moving space, and has the magnetic conductive characteristic, so that a working magnetic field can be folded, and the external magnetic leakage of the motor is reduced;

7. the upper cover plate and the support frame are respectively provided with a limiting block at two ends corresponding to the vibration assembly, and the limiting blocks are used for limiting mechanical impact tests and limiting structures under working conditions, so that the spring under severe conditions is effectively protected, and the damage of the spring is avoided;

8. the magnetic circuit can adjust the starting vibration direction, the magnetic leakage polarity, the magnetic leakage magnitude and the like according to requirements, and has flexible flux variability and adaptability.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of a stator assembly of the present invention;

FIG. 4 is a schematic structural view of a vibration assembly of the present invention;

FIG. 5 is a schematic structural view of an upper cover plate according to the present invention;

FIG. 6 is a schematic structural view of a side cover plate according to the present invention;

FIG. 7 is a schematic structural view of the stand according to the present invention;

FIG. 8 is a schematic view of the spring of the present invention;

fig. 9 is a schematic diagram of the phase relationship of the first magnetic circuit scheme and the coil current thereof according to the present invention;

fig. 10 is a schematic diagram of the phase relationship of the coil current of the second magnetic circuit scheme of the present invention;

FIGS. 11 to 13 are schematic structural views of example 3 of the present invention;

FIGS. 14 to 16 are schematic structural views of embodiment 4 of the present invention;

FIGS. 17 to 18 are schematic structural views of example 5 of the present invention;

in the figure: 1. an upper cover plate; 2. pole pieces; 3. a plastic block; 4. a stopper; 5. a spring; 6. a vibrator; 7. a support frame; 8. a magnetic steel group; 9. a side cover plate; 10. an iron core; 11. a coil; 12. a flexible circuit board; 13. a stator assembly; 14. a vibrating assembly; 15. an outer housing; 16. a first positioning groove; 17. a limiting block; 18. a second positioning block; 19. a second positioning groove; 20. a first positioning block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.