阅读说明：本技术 一种方形线性振动电机及其实现方法 (Square linear vibration motor and implementation method thereof ) 是由 严新江 周扬栋 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种方形线性振动电机,包括下托架,下托架的上部设有机壳,下托架的上方设有FPC板,FPC板上连接有线圈,下托架的上方还连接有塑料弹簧,塑料弹簧的内部设有磁框,磁框与塑料弹簧通过注塑连接,磁框的内部设有磁钢组；本发明还公开了一种方形线性振动电机的实现方法。本发明塑料弹簧包括内环,其中,内环的两侧对称设有连接边,内环与连接边之间通过若干悬臂连接,内环与磁框通过注塑连接,连接边通过胶水与下托架粘接,避免了传统金属弹簧的激光焊接方式对弹簧造成不可避免的灼伤,从而有效的提升了电机的寿命以及可靠性。(The invention discloses a square linear vibration motor, which comprises a lower bracket, wherein the upper part of the lower bracket is provided with a shell, an FPC (flexible printed circuit) board is arranged above the lower bracket, a coil is connected onto the FPC board, a plastic spring is also connected above the lower bracket, a magnetic frame is arranged inside the plastic spring, the magnetic frame is connected with the plastic spring through injection molding, and a magnetic steel group is arranged inside the magnetic frame; the invention also discloses a method for realizing the square linear vibration motor. The plastic spring comprises an inner ring, wherein the two sides of the inner ring are symmetrically provided with connecting edges, the inner ring is connected with the connecting edges through a plurality of cantilevers, the inner ring is connected with the magnetic frame through injection molding, and the connecting edges are bonded with the lower bracket through glue, so that the inevitable burn of the spring caused by the traditional laser welding mode of a metal spring is avoided, and the service life and the reliability of a motor are effectively improved.)

1. The utility model provides a square linear vibration motor, includes lower bracket, its characterized in that: the upper portion of bottom bracket is equipped with the casing, and the top of bottom bracket is equipped with the FPC board, is connected with the coil on the FPC board, and the top of bottom bracket still is connected with the plastics spring, and the inside of plastics spring is equipped with the magnetic frame, and the magnetic frame is connected through moulding plastics with the plastics spring, and the inside of magnetic frame is equipped with magnet steel group.

2. A square-shaped linear vibration motor according to claim 1, characterized in that: the magnetic steel group comprises second magnetic steel, wherein the second magnetic steel is connected to the magnetic frame, and the second magnetic steel is located inside the coil.

3. A square-shaped linear vibration motor according to claim 2, characterized in that: and a pole piece is connected below the second magnetic steel.

4. A square-shaped linear vibration motor according to claim 2, characterized in that: the magnetic steel group further comprises first magnetic steel, wherein the first magnetic steel is of an annular structure, the first magnetic steel is connected to the magnetic frame, and the first magnetic steel is sleeved outside the coil.

5. A square-shaped linear vibration motor according to claim 4, wherein: the magnetic pole directions of the first magnetic steel and the second magnetic steel are axial, and the magnetic pole directions of the first magnetic steel and the second magnetic steel are opposite.

6. A square-shaped linear vibration motor according to claim 1, characterized in that: the plastic spring comprises an inner ring, wherein the two sides of the inner ring are symmetrically provided with connecting edges, and the inner ring is connected with the connecting edges through a plurality of cantilevers.

7. A square-shaped linear vibration motor according to claim 6, wherein: and bosses are symmetrically arranged on the outer side wall of the inner ring.

8. A square-shaped linear vibration motor according to claim 1, characterized in that: the end parts of two symmetrical side edges of the lower bracket are respectively provided with a connecting block, and a positioning block is arranged between the two connecting blocks positioned on the same side.

9. A square-shaped linear vibration motor according to claim 8, wherein: and the outer side edge of the connecting block is provided with a limiting block.

10. A method of implementing a square-shaped linear vibration motor according to any one of claims 1 to 9, comprising the steps of:

the shell and the lower bracket form a closed cavity;

the magnetic steel group is connected inside the magnetic frame to provide a driving magnetic field for the motor;

thirdly, the coil and the FPC board form a circuit, and when the circuit is electrified, an electric field and a magnetic field interact to drive the motor to vibrate up and down;

and (IV) the plastic spring is connected with the lower bracket and the magnetic frame to provide elasticity for the vibration of the motor, so that the motor can vibrate up and down in a reciprocating manner.

Technical Field

The invention belongs to the technical field of vibration motors, and particularly relates to a square linear vibration motor and an implementation method thereof.

Background

With the increased competition of consumer electronics markets such as smart phones and the like, manufacturers pay more and more attention to the touch experience of users, and mobile consumer electronics products in the current market generally use a micro linear vibration motor as a system feedback component, such as key touch feedback of a mobile phone, vibration feedback of a game machine and the like.

The conventional miniature linear vibration motor structure adopts a metal spring to provide vibration restoring force, and the connection mode of a metal spring vibrator also adopts a laser welding mode generally, so that the spring is inevitably burnt during laser welding, and the service life of the motor is influenced.

Disclosure of Invention

The present invention is directed to a square linear vibration motor to solve the problems of the related art. The square linear vibration motor provided by the invention has the characteristics of avoiding a laser welding process of a spring and prolonging the service life of the motor.

The invention also aims to provide a method for realizing the square linear vibration motor.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a square linear vibration motor, includes the lower bracket, and the upper portion of lower bracket is equipped with the casing, and the top of lower bracket is equipped with the FPC board, is connected with the coil on the FPC board, and the top of lower bracket still is connected with the plastics spring, and the inside of plastics spring is equipped with the magnetic frame, and the magnetic frame is connected through moulding plastics with the plastics spring, and the inside of magnetic frame is equipped with magnet steel group.

In order to improve the utilization ratio of the magnetic field and the driving force of the product, further, the magnetic steel group comprises second magnetic steel, wherein the second magnetic steel is connected to the magnetic frame, and the second magnetic steel is located inside the coil. The magnetic steel group further comprises first magnetic steel, wherein the first magnetic steel is of an annular structure, the first magnetic steel is connected to the magnetic frame, and the first magnetic steel is sleeved outside the coil. The magnetic pole directions of the first magnetic steel and the second magnetic steel are axial, and the magnetic pole directions of the first magnetic steel and the second magnetic steel are opposite.

In order to draw the magnetic field and increase the magnetic induction intensity on the coil side, so as to increase the driving force, a pole piece is connected below the second magnetic steel.

In order to effectively prolong the service life and reliability of the motor, the plastic spring further comprises an inner ring, wherein the two sides of the inner ring are symmetrically provided with connecting edges, and the inner ring is connected with the connecting edges through a plurality of cantilevers.

In order to ensure that the coil can not touch the magnetic steel group in the motor motion process or fall, the coil is protected, so that the reliability of the motor is improved, and furthermore, bosses are symmetrically arranged on the outer side wall of the inner ring.

In order to provide an adhesive surface for the plastic spring; and meanwhile, the plastic spring is quickly positioned, furthermore, connecting blocks are respectively arranged at the end parts of two symmetrical side edges of the lower bracket, and a positioning block is arranged between the two connecting blocks positioned at the same side.

In order to limit the plastic spring, a limiting block is arranged on the outer side edge of the connecting block.

Further, the method for implementing a square linear vibration motor includes the following steps:

the shell and the lower bracket form a closed cavity;

the magnetic steel group is connected inside the magnetic frame to provide a driving magnetic field for the motor;

thirdly, the coil and the FPC board form a circuit, and when the circuit is electrified, an electric field and a magnetic field interact to drive the motor to vibrate up and down;

and (IV) the plastic spring is connected with the lower bracket and the magnetic frame to provide elasticity for the vibration of the motor, so that the motor can vibrate up and down in a reciprocating manner.

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

1. the plastic spring comprises an inner ring, wherein connecting edges are symmetrically arranged on two sides of the inner ring, the inner ring is connected with the connecting edges through a plurality of cantilevers, the inner ring is connected with a magnetic frame through injection molding, and the connecting edges are bonded with a lower bracket through glue, so that the inevitable burn of the spring caused by a traditional metal spring laser welding mode is avoided, the service life of a motor is effectively prolonged, and the reliability of the motor is effectively improved;

2. the end parts of two symmetrical side edges of the lower bracket are respectively provided with the connecting block, and the connecting blocks provide bonding surfaces for the plastic springs, so that the plastic springs can be conveniently and quickly assembled;

3. according to the invention, the positioning block is arranged between the two connecting blocks positioned on the same side, and the connecting blocks are matched with the positioning block, so that the plastic spring can be quickly positioned;

4. the outer side wall of the inner ring is symmetrically provided with four bosses which are symmetrically arranged in pairs, and the bosses are used for limiting, so that the coil is prevented from touching the magnetic steel group in the motor motion process or falling, the coil is protected, and the reliability of the motor is improved;

5. eight cantilevers are arranged, wherein four cantilevers are horizontally arranged, four cantilevers are vertically arranged and are symmetrically arranged, and the F0 modal direction of the motor can be Z direction.

Drawings

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

FIG. 2 is a schematic view of the construction of the lower bracket of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic axial side view of the plastic spring of the present invention;

FIG. 5 is a schematic front view of the plastic spring of the present invention;

FIG. 6 is a schematic view of the structure of the magnetic frame, plastic spring and lower bracket of the present invention;

fig. 7 is a schematic diagram of the electromagnetic drive of the present invention.

In the figure: 1. a housing; 2. a magnetic frame; 3. a plastic spring; 31. an inner ring; 32. a cantilever; 33. a connecting edge; 34. a boss; 4. a first magnetic steel; 5. pole pieces; 6. a lower bracket; 61. positioning blocks; 62. connecting blocks; 63. a limiting block; 7. an FPC board; 8. a coil; 9. and a second magnetic steel.

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.

Example 1

Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides a square linear vibrating motor, includes lower bracket 6, and the upper portion of lower bracket 6 is equipped with casing 1, and the top of lower bracket 6 is equipped with FPC board 7, is connected with coil 8 on the FPC board 7, and the top of lower bracket 6 still is connected with plastic spring 3, and plastic spring 3's inside is equipped with magnetic frame 2, and magnetic frame 2 is connected through moulding plastics with plastic spring 3, and magnetic frame 2's inside is equipped with magnet steel group.

Specifically, the magnetic steel group comprises second magnetic steel 9, wherein the second magnetic steel 9 is bonded on the magnetic frame 2 through glue, and the second magnetic steel 9 is located inside the coil 8. The magnetic steel group further comprises a first magnetic steel 4, wherein the first magnetic steel 4 is of an annular structure, the first magnetic steel 4 is also bonded to the magnetic frame 2 through glue, and the first magnetic steel 4 is sleeved outside the coil 8. The magnetic pole directions of the first magnetic steel 4 and the second magnetic steel 9 are both axial, and the magnetic pole directions of the first magnetic steel 4 and the second magnetic steel 9 are opposite.

Through adopting above-mentioned technical scheme, coil 8 is arranged in between first magnet steel 4 and the second magnet steel 9 to first magnet steel 4 and the polarity of second magnet steel 9 are opposite, can be so that more coil 8 that pass through in first magnet steel 4 and the magnetic field of second magnet steel 9, thereby improve the utilization ratio in magnetic field, improve the drive power of product.

Specifically, the pole piece 5 is connected below the second magnetic steel 9.

By adopting the technical scheme, the pole piece 5 can draw in the magnetic field and increase the magnetic induction intensity of the coil side, thereby increasing the driving force.

Specifically, the plastic spring 3 includes an inner ring 31, wherein the inner ring 31 is symmetrically provided with connecting edges 33 at both sides thereof, and the inner ring 31 is connected to the connecting edges 33 through a plurality of cantilevers 32.

Through adopting above-mentioned technical scheme, inner ring 31 is connected through moulding plastics with magnetic frame 2, connects limit 33 and bonds through glue and lower bracket 6, and the laser welding mode of having avoided traditional metal spring causes inevitable burn to the spring to effectual life-span and the reliability that has promoted the motor.

Specifically, the ends of two symmetrical sides of the lower bracket 6 are respectively provided with a connecting block 62, the connecting edge 33 is adhered to the connecting block 62 by glue, and a positioning block 61 is arranged between the two connecting blocks 62 on the same side.

By adopting the technical scheme, the connecting block 62 provides an adhesive surface for the plastic spring 3; meanwhile, the connecting block 62 is matched with the positioning block 61 to quickly position the plastic spring 3.

Specifically, the outer side edge of the connecting block 62 is provided with a limiting block 63.

Through adopting above-mentioned technical scheme, set up through stopper 63 and carry on spacingly to plastic spring 3.

Example 2

The present embodiment is different from embodiment 1 in that: specifically, the outer side wall of the inner ring 31 is symmetrically provided with four bosses 34, and the bosses 34 are symmetrically arranged in pairs.

Through adopting above-mentioned technical scheme, carry on spacingly through boss 34, guarantee that coil 8 can not touch with magnet steel group when the motor motion process or fall, realize the protection to coil 8 to promote the reliability of motor.

Example 3

The present embodiment is different from embodiment 1 in that: specifically, eight cantilevers 32 are arranged, four of which are horizontally arranged and four of which are vertically arranged and are symmetrically arranged.

By adopting the technical scheme, the F0 modal direction of the motor can be the Z direction (the vertical direction).

Further, the implementation method of the square linear vibration motor comprises the following steps:

the shell 1 and the lower bracket 6 form a closed cavity;

the magnetic steel group is connected inside the magnetic frame 2 to provide a driving magnetic field for the motor;

thirdly, the coil 8 and the FPC board 7 form a circuit, and when the circuit is electrified, an electric field and a magnetic field interact to drive the motor to vibrate up and down;

and (IV) the plastic spring 3 is connected with the lower bracket 6 and the magnetic frame 2, so that elasticity is provided for the vibration of the motor, and the motor can vibrate up and down in a reciprocating manner.

In summary, the plastic spring 3 of the present invention comprises an inner ring 31, wherein the two sides of the inner ring 31 are symmetrically provided with connecting edges 33, the inner ring 31 is connected with the connecting edges 33 through a plurality of cantilevers 32, the inner ring 31 is connected with the magnetic frame 2 through injection molding, and the connecting edges 33 are bonded with the lower bracket 6 through glue, such that unavoidable burn to the spring caused by the traditional laser welding method of the metal spring is avoided, and thereby the service life and reliability of the motor are effectively improved; the end parts of two symmetrical side edges of the lower bracket 6 are respectively provided with the connecting block 62, and the connecting blocks 62 provide bonding surfaces for the plastic spring 3, so that the plastic spring 3 can be conveniently and quickly assembled; the positioning block 61 is arranged between the two connecting blocks 62 positioned on the same side, and the connecting blocks 62 are matched with the positioning block 61, so that the plastic spring 3 can be quickly positioned; the bosses 34 are symmetrically arranged on the outer side wall of the inner ring 31, the bosses 34 are four in number and are symmetrically arranged in pairs, and the bosses 34 are used for limiting, so that the coil 8 is prevented from touching the magnetic steel group in the motor motion process or falling, the coil 8 is protected, and the reliability of the motor is improved; eight cantilevers 32 are arranged, wherein four cantilevers are horizontally arranged, four cantilevers are vertically arranged and are symmetrically arranged, and the F0 modal direction of the motor can be the Z direction.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.