CN218335632U - Miniature vibrating motor with non-contact vibration damping - Google Patents

Abstract

The utility model relates to a miniature vibrating motor with non-contact vibration damping, including lower casing, upper casing, printed circuit board, coil, quality piece and shell fragment, the lower casing is the flat board, is provided with printed circuit board on the flat board, the coil sets up on printed circuit board, upper and lower casing mutually supports and forms closed cavity, and the quality piece is suspended in closed cavity through the shell fragment, and the quality piece middle part is provided with magnetic unit and combines the through-hole, and the magnetic unit combines the fixed halbach array magnetic unit in the through-hole; and a damping fin which forms a magnetic circuit structure with the Halbach array magnetic group is arranged right above the Halbach array magnetic group, the damping fin is fixed in the upper shell, and the bottom of the mass block is also provided with a trapezoidal smashing-proof boss. The utility model discloses set up the damping fin above the oscillator, the damping fin is fixed in the casing, and this mode replaces traditional damping material bubble cotton and magnetic fluid, has still prolonged motor working life when realizing that the vibration is fallen and make an uproar and shorten motor response time.

Description

Miniature vibrating motor with non-contact vibration damping

Technical Field

The utility model belongs to the technical field of electromagnetism and vibration mechanics, a ultra-thin miniature linear motor is related to, especially a miniature vibrating motor with non-contact vibration damping.

Background

Along with the development of intelligent products, the linear motor of the intelligent electronic cigarette is gradually applied to various fields such as VR/AR, electronic cigarettes and intelligent wearing. Meanwhile, for better appearance and use comfort of the electronic whole machine product, the whole machine of the electronic whole machine product is more suitable for a miniaturized linear motor, and how to ensure higher performance under the condition of the miniaturized linear motor is an important research direction in the future.

In order to reduce the response time of the conventional linear motor after power failure, the damping effect is achieved mainly by adding magnetic fluid or foam or other elastic colloids. However, these damping modes are affected by the reliability of the motor, and the performance of the product is deteriorated. Wherein the magnetic fluid is easy to splash after the directional drop feasibility test, which causes poor noise performance of the product; the foam or other elastic colloid is contacted with the elastic sheet in the vibration process of the motor, so that the concentrated stress of the elastic sheet is increased, and the service life of the motor is influenced; in addition, in order to reduce the collision between the mass block and the coil in the directional feasible falling process and the product open circuit caused by the collision of the mass block and the coil, the general linear motor structure usually achieves the limiting protection effect by adding the cushion block, so that the process difficulty is increased, and the difficulty of the miniaturization design of the product is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a miniature vibrating motor with non-contact vibration damping.

The utility model provides a its technical problem take following technical scheme to realize:

a micro vibration motor with non-contact vibration damping comprises a lower shell, an upper shell, a printed circuit board, a coil, a mass block and an elastic sheet, wherein the lower shell is a flat plate, the printed circuit board is arranged on the flat plate, the coil is arranged on the printed circuit board, the inner part of the upper shell is hollow and forms the external outline of a vibration device, the upper shell and the lower shell are matched with each other to form a closed cavity, the mass block is suspended in the closed cavity through the elastic sheet, a magnetic group combining through hole is arranged in the middle of the mass block, and a Halbach array magnetic group is fixed in the magnetic group combining through hole; and a damping fin which forms a magnetic circuit structure with the Halbach array magnetic group is arranged right above the Halbach array magnetic group, the damping fin is fixed in the upper shell, and the bottom of the mass block is also provided with a trapezoidal smashing-proof boss.

And, the inside positioning groove who is used for inlaying the dress damping fin of seting up of above-mentioned casing.

Moreover, the damping fin is of a cross-shaped sheet structure.

Moreover, the damping sheet is a copper sheet or a silicon steel sheet.

And the gasket is combined with the elastic sheet and used for supporting the connection between the elastic sheet and the mass block and the connection and fixation between the elastic sheet and the shell.

And the top of the mass block is also provided with an embedding groove, a metal plate is embedded in the embedding groove, the metal plate is arranged on the Halbach array magnetic group, and the upper surface of the metal plate is flush with the upper surface of the mass block.

The utility model has the advantages that:

the utility model discloses be provided with directly over haier beck array magnetism group with haier beck array magnetism group and form the damping fin of magnetic structure, the damping fin is fixed in the upper shell, the setting of this damping fin, when the product outage is in the twinkling of an eye, because the eddy current effect that induced-current produced makes a part of mechanical energy of product oscillator part turn into heat energy to realize the effect of electromagnetic damping, make the oscillator stop the vibration in the twinkling of an eye, reduce the decline time of product;

the damping sheet of the utility model adopts copper sheet, silicon steel sheet or material with good conductivity to replace foam material of the traditional motor, thus solving the problem that the magnetic fluid splashes after the directional drop feasibility test, which leads to poor noise performance of the product and foam or other elastic colloids, and contacts with the elastic sheet in the vibration process of the motor, increasing the concentrated stress of the elastic sheet, influencing the feasibility of the service life of the motor, simplifying the production process and greatly improving the feasibility strength of the product;

the upper shell of the utility model is internally provided with a positioning groove for embedding the damping fin, which is convenient for the damping fin to be accurately positioned, simplifies the manufacturing process and improves the production yield; the trapezoid anti-smashing boss is arranged at the bottom of the mass block and replaces the traditional cushion block structure, so that the production process is simplified, and the production efficiency of products is improved; the vibrator quality is increased, and the vibration sensing performance of the product is improved.

Drawings

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

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a structure diagram of the magnetic circuit of the present invention;

FIG. 4 is a view of the housing structure of the present invention;

FIG. 5 is an assembly view of the mass block anti-pound boss structure of the present invention;

fig. 6 is a structure diagram of the mass block of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.

A micro vibration motor with non-contact vibration damping comprises a lower shell 10, an upper shell 1, a printed circuit board 9, a coil 8, a mass block 4 and an elastic sheet 7, wherein the lower shell is a flat plate, the printed circuit board is arranged on the flat plate, the coil is arranged on the printed circuit board, the inner part of the upper shell is hollow and forms the external outline of a vibration device, the upper shell and the lower shell are matched with each other to form a closed cavity, the mass block is suspended in the closed cavity through the elastic sheet, a magnetic group combination through hole 4-2 is arranged in the middle of the mass block, and a Halbach array magnetic group 5 is fixed in the magnetic group combination through hole to ensure that the mass block has weight, and vibration is amplified by utilizing the weight; the bottom of the mass block is also provided with a trapezoidal smashing prevention boss 4-1 which replaces the traditional cushion block structure, so that the production process is simplified, and the production efficiency of the product is improved; the mass of the mass block is increased, the vibration induction performance of the product is improved, and the product open circuit caused by collision between the mass block and the coil in the directional feasibility falling process is reduced; and a damping fin 2 which forms a magnetic circuit structure with the Halbach array magnetic assembly is arranged right above the Halbach array magnetic assembly and is fixed in the upper shell.

The Halbach Array (Halbach Array) described in this embodiment is an arrangement of permanent magnets, which means that permanent magnets with different magnetization directions are arranged in a certain order, so that the magnetic field at one side of the Array is significantly enhanced; therefore, the magnetic loop is shortened, the utilization rate of the magnetic induction line is improved, the magnetic induction intensity of a magnetic circuit of a product is increased, the driving force is improved, the response time of the product is shortened, and the vibration induction of the product is improved;

in the specific implementation of the utility model, in order to facilitate the accurate positioning of the damping fin, simplify the production process and improve the production yield, a positioning groove 1-1 for embedding the damping fin is arranged in the upper shell;

in the specific implementation of the utility model, the damping fin is a cross-shaped sheet structure, and the damping fin is a copper sheet, a silicon steel sheet or a material with good conductivity, the utility model discloses preferentially select the copper sheet, when the product is powered off, because of the eddy current effect that induced current produced, make a part of mechanical energy of the product oscillator part turn into heat energy, thereby realize the effect of electromagnetic damping, make the oscillator stop vibrating in the twinkling of an eye, reduce the decline time of the product; the damping sheet replaces a damping material of a traditional motor, the problem that the noise performance of a product is poor due to splashing of magnetic fluid after a directional drop feasibility test, the problem that the motor is in contact with the elastic sheet in the vibration process of the motor, the concentrated stress of the elastic sheet is increased, and the feasibility of the service life of the motor is influenced is solved, the production process is simplified, and the feasibility strength of the product is greatly improved;

furthermore, in order to prevent the elastic sheet from deforming and being damaged, gaskets 6 are arranged at the connecting surface of the elastic sheet and the mass block and the connecting surface of the elastic sheet and the upper shell, and the gaskets are combined with the elastic sheet and used for supporting the connection of the elastic sheet and the mass block and the connection of the elastic sheet and the upper shell so as to fix the elastic sheet and the mass block;

furthermore, an embedded groove is formed in the top of the mass block, a metal plate 3 is embedded in the embedded groove, the metal plate is arranged on the Halbach array magnetic group, the upper surface of the metal plate is flush with the upper surface of the mass block, and the arrangement of the metal plate gathers magnetic induction lines, so that more magnetic induction lines penetrate through the conductive coil, the magnetic leakage of a product is prevented, and the magnetization influence of the product on other parts in the whole machine due to the magnetic leakage is avoided;

the working principle of the utility model is that the electromagnetic energy, the heat energy and the mechanical energy are mutually converted, when the power is on, the coil cuts the magnetic induction line to generate ampere force to drive the internal vibrator to move, the elastic sheet provides continuous restoring force, thereby realizing the stable vibration of the vibrator, when the power is off, because of the eddy current effect of the induced current, partial mechanical energy is converted into the heat energy, the descending time of the motor is instantly reduced, and the response speed is improved; wherein the utility model discloses a structure includes by permanent magnet (halbach array magnetism group), the metal sheet, the shell fragment, the oscillator part that the quality piece constitutes and by upper and lower casing, FPCB, the coil, the stator part that the damping fin constitutes, on, the lower casing is mutually supported and is formed closed cavity, the oscillator passes through the shell fragment and is suspended in the casing, flexible printed circuit board receives the power from the outside, supply with the coil with the power, produce the electric field after the coil receives the power that flexible printed circuit board supplied with, make the electric field that produces and the magnetic field of magnet act on, and the cooperation through the shell fragment produces stable horizontal vibration.

Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.

Claims (6)

1. The utility model provides a miniature vibrating motor with non-contact vibration damping, includes casing, last casing, printed circuit board, coil, quality piece and shell fragment down, the casing is the flat board down, is provided with printed circuit board on the flat board, the coil sets up on printed circuit board, it is empty to go up the inside outside outline that is of casing, is the external profile who forms vibrating device, and upper and lower casing mutually supports and forms closed cavity, and the quality piece is suspended in closed cavity through the shell fragment, its characterized in that: a magnetic group combination through hole is formed in the middle of the mass block, and a Halbach array magnetic group is fixed in the magnetic group combination through hole; and a damping fin which forms a magnetic circuit structure with the Halbach array magnetic group is arranged right above the Halbach array magnetic group, the damping fin is fixed in the upper shell, and the bottom of the mass block is also provided with a trapezoidal smashing-proof boss.

2. The micro vibration motor with noncontact vibration damping according to claim 1, characterized in that: and a positioning groove for embedding the damping fin is formed in the upper shell.

3. The miniature vibration motor with noncontact vibration damping of claim 1, wherein: the damping fin is of a cross-shaped sheet structure.

4. The micro vibration motor with noncontact vibration damping according to claim 1, characterized in that: the damping sheet is a copper sheet or a silicon steel sheet.

5. The micro vibration motor with noncontact vibration damping according to claim 1, characterized in that: gaskets are arranged at the connecting surface of the elastic sheet and the mass block and the connecting surface of the elastic sheet and the shell, and the gaskets are combined with the elastic sheet and used for supporting the connection between the elastic sheet and the mass block and the connection between the elastic sheet and the shell to be fixed.

6. The micro vibration motor with noncontact vibration damping according to claim 1, characterized in that: and the top of the mass block is also provided with an embedded groove, a metal plate is embedded in the embedded groove, the metal plate is arranged on the Halbach array magnetic group, and the upper surface of the metal plate is flush with the upper surface of the mass block.

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