CN214850923U

CN214850923U - Broadband linear motor

Info

Publication number: CN214850923U
Application number: CN202121238105.2U
Authority: CN
Inventors: 曹洪斌
Original assignee: Suzhou Suoye Electronic Technology Co ltd
Current assignee: Suzhou Suoye Electronic Technology Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-23
Anticipated expiration: 2031-06-03

Abstract

The utility model belongs to the technical field of linear motors, in particular to a broadband linear motor; the method comprises the following steps: the vibrator comprises two end faces and a side face; the stator comprises a first magnetic part and a second magnetic part, the first magnetic part and the second magnetic part are respectively arranged on two sides of the vibrator and are respectively arranged opposite to two end faces of the vibrator; and the coil is arranged around the side surface of the vibrator. The balance magnetic force field is adopted, a smaller motion space is needed, and the main aim is to provide more uniform vibration quantity response in a wider frequency band range, so that richer and more exquisite tactile feedback is provided for customers. Simultaneously the utility model discloses a surround the magnet steel design to combine lubricating oil to make the oscillator suspend in stator inner mould chamber, thereby avoid the oscillator and the quality problems such as noise that stator inner mould chamber friction leads to.

Description

Broadband linear motor

Technical Field

The utility model belongs to the technical field of linear motor, concretely relates to wide band linear motor.

Background

The linear motor is also called as a linear motor, is a micro motor which generates vibration in the horizontal direction, is widely used in portable electronic products such as mobile phones, handheld game consoles and game pads, and is also widely applied to other occasions needing to provide a vibration function, such as massagers or multimedia entertainment equipment with a vibration function.

Chinese patent CN205883019U provides a vibrator for a linear motor and a linear motor, including a magnetic assembly and an upper elastic assembly and a lower elastic assembly disposed on the upper and lower sides of the magnetic assembly, wherein the upper elastic assembly and the lower elastic assembly both include a main body for bearing the magnetic assembly and elastic structures disposed on the two sides of the magnetic assembly. Like the linear motors provided in the above-mentioned patents, most of the linear motors applied in the market include a vibrator, a stator, and an elastic member, and provide a driving force required for vibration by magnetic interaction of the vibrator and the stator, and provide damping by the elastic member, thereby providing a vibration effect.

However, the conventional linear motors on the market generally have the following problems that (1) the vibrator may rub against the housing in the vibration process, and the thickness of the housing can only be increased in order to ensure the structural strength and the protection function, but the linear motors have strict volume limitation in the application environment, and the volume of the vibrator is greatly limited after the housing occupies a large design volume. (2) Damping is provided through the elastic component, on one hand, the elastic component has a fatigue limit, and the service life of the linear motor is limited; on the other hand, the elastic component has fracture risk, and the reliability of the linear motor is reduced; also, the vibrator collides with and rubs against the elastic member during vibration, which may generate noise. (3) The traditional vibration motor provides vibration power by depending on a single-side magnetic field, and a vibrator needs a larger motion space if the vibrator needs to exert the effect, so that the response frequency range of vibration is narrower, and the vibration effect with level change cannot be provided in a larger frequency range. (4) The vibrator structure is not high in strength, and the vibrator can be broken or failed if falling or other severe impacts are met.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a wide band linear motor, include:

the vibrator comprises two end faces and a side face;

the stator comprises a first magnetic part and a second magnetic part, the first magnetic part and the second magnetic part are respectively arranged on two sides of the vibrator and are respectively arranged opposite to two end faces of the vibrator;

and the coil is arranged around the side surface of the vibrator.

As a preferred technical solution, the first magnetic member and the second magnetic member are provided as a plate structure; preferably, the first magnetic member and the second magnetic member are provided as a plate structure with a central hole.

As a preferred technical scheme, the vibrator comprises a central magnetic part and a plurality of end magnetic parts, wherein the number of the end magnetic parts is even; the end magnetic parts are symmetrically arranged on two sides of the central magnetic part.

As a preferable technical solution, the end magnetic members and the central magnetic member are fixedly connected by a core rod, and the end magnetic members adjacently arranged are connected by a core rod; the range of the coil surrounding the vibrator comprises the core rod.

As a preferable technical solution, the stator is disposed opposite to the end magnetic member, and an end face size of the stator is greater than or equal to an end face size of the end magnetic member.

As a preferable technical solution, the vibrator further includes a fixing piece fixedly connected to the central magnetic piece and the end magnetic piece.

As a preferred technical scheme, the thickness of the fixing sheet is 0.01-0.3 mm.

As a preferable technical scheme, the material of the fixing piece is a non-magnetic stainless steel material, a non-magnetic alloy material or a non-magnetic polymer material.

As a preferable technical scheme, the motor further comprises an outer shell, the stator is fixedly arranged at the end part of the inner side of the outer shell, the coil is arranged on the side part of the inner side of the outer shell or arranged around the outer side of the outer shell (4), a lubricant is filled in the cavity of the outer shell, and the vibrator is arranged in the cavity of the outer shell in a suspension mode through the lubricant.

As a preferred technical scheme, the vibrator further comprises a sleeve, wherein the sleeve is fixedly arranged on the inner wall of the cavity of the shell and surrounds the side face of the vibrator.

Has the advantages that:

(1) the utility model discloses a balanced magnetic force field needs less motion space, and the main objective is in order to realize providing more for even vibration volume response in the broad frequency band within range to provide abundanter, more exquisite tactile feedback for the customer. Simultaneously the utility model discloses a surround the magnet steel design to combine lubricating oil to make the oscillator suspend in stator inner mould chamber, thereby avoid the oscillator and the quality problems such as noise that stator inner mould chamber friction leads to.

(2) The utility model discloses a no mechanical spring design need not to provide the elastic component and provides the damping, but uses lubricating oil, provides the damping through the viscidity of lubricating oil, has avoidd the problem that life is short that mechanical spring's fatigue limit problem brought, has also avoidd the cracked risk of spring moreover to the reliability risk of having avoided mechanical spring to lead to, and greatly reduced the manufacturing process degree of difficulty, reduced material and manufacturing cost.

(3) In the utility model, the vibrator comprises a central magnetic part, an end magnetic part and a core rod which are fixedly connected with each other, and the vibrator needs to ensure higher shape tolerance, so the vibrator is generally fixedly connected by adopting a bonding or welding mode and can be broken when falling or violent impact occurs; the utility model discloses in set up the stationary blade on the oscillator, through a rigidity piece with central magnetic part and tip magnetic part fixed connection, absorb the load that pulling force and shearing force brought, increase structural strength, avoid the fracture risk.

(4) The utility model discloses in, set up the terminal surface size of stator into the terminal surface size that is more than or equal to the oscillator, this is in order to satisfy the assembly requirement, if the too big magnetic force that probably provides the excess demand of area of stator simultaneously, so set up the stator into central open-ended structure, control its magnetic force size to adjustment resonant frequency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.

For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale.

Fig. 1 is a schematic cross-sectional structural diagram of a broadband linear motor provided by the present invention;

FIG. 2 is a schematic perspective view of a vibrator;

FIG. 3 is a schematic cross-sectional structure of the vibrator;

fig. 4 is a schematic view of a magnetic field of a broadband linear motor according to the present invention;

fig. 5 is a graph comparing the vibration amount of the broadband linear motor and the conventional linear motor.

Wherein, the vibrator is 1-a vibrator, the central magnetic part is 11-a terminal magnetic part is 12-a core rod is 13-a core rod, the fixing piece is 14-a stator is 2-a coil is 3-a shell is 4-a sleeve is 5-a sleeve is provided.

Detailed Description

The disclosure may be further understood in conjunction with the following detailed description of preferred embodiments of the invention and the examples included.

When describing embodiments of the present application, the use of "preferred," "preferably," "more preferred," etc., refers to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

In this document, relational terms such as first, second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a component, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such component, apparatus, or device.

When a component, element, or layer is referred to as being "on," "bonded to," "connected to," or "coupled to" another element or layer, it may be directly on, bonded to, connected to, or coupled to the other element, or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly coupled to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …," "adjacent" versus "directly adjacent," etc.).

A broadband linear motor as shown in FIGS. 1-4 comprises:

the vibrator 1 comprises two end faces and a side face;

the stator 2 comprises a first magnetic part and a second magnetic part, the first magnetic part and the second magnetic part are respectively arranged on two sides of the vibrator 1 and are respectively opposite to two end faces of the vibrator 1;

and the coil 3 is arranged around the side surface of the vibrator 1.

Preferably, the stator is made of a permanent magnet material.

The first magnetic part and the second magnetic part are arranged in a plate type structure; preferably, the first magnetic member and the second magnetic member are provided as a plate structure with a central hole.

The first magnetic part and the second magnetic part are arranged in a plate type structure, so that an end face with a large area is provided on the premise that the design volume is reduced as much as possible and is used for being matched with the area of the end face of the vibrator, and the first magnetic part and the second magnetic part are arranged in a central hole structure because the complete plate type stator may generate magnetic force exceeding the requirement, so that the volume of the first magnetic part and the second magnetic part is required to be reduced to reduce the magnetic force.

The vibrator 1 comprises a central magnetic part 11 and a plurality of end magnetic parts 12, wherein the number of the end magnetic parts 12 is even; the end magnetic members 12 are symmetrically arranged on both sides of the central magnetic member 11.

The end magnetic members 12 and the central magnetic member 11 are fixedly connected through a core rod 13, and the end magnetic members 12 arranged adjacently are connected through the core rod 13; the range of the coil 3 surrounding the vibrator 1 includes the core rod 13.

Specifically, the core rod 13 is made of a magnetic conductive material.

The number of the end magnetic members may be a plurality, preferably 2, and the end magnetic members are respectively disposed at two sides of the central magnetic member, and the core rod is disposed to provide a fixed connection function, and more importantly, to provide a magnetic field force with a direction changing in cooperation with the coil.

The stator 2 is arranged opposite to the end magnetic part 12, and the size of the end face of the stator 2 is larger than or equal to that of the end face of the end magnetic part 12.

Specifically, the area of a side line surrounding the outermost side of the end face of the stator is larger than the area of the end face of the magnetic part.

The vibrator 1 further comprises a fixing piece 14, and the fixing piece 14 is fixedly connected with the central magnetic piece 11 and the end magnetic pieces 12.

The thickness of the fixing piece 14 is 0.01-0.3 mm.

The fixing piece 14 is made of a non-magnetic stainless steel material, a non-magnetic alloy material or a non-magnetic high polymer material; the polymer material is preferably PET or POM.

The stationary blade is through a rigidity piece with center magnetic part and tip magnetic part fixed connection, absorbs the load that pulling force and shearing force brought, increases structural strength, avoids the fracture risk to promote the reliability of oscillator.

Still include shell 4, stator 2 is fixed to be set up the medial extremity of shell 4, coil 3 sets up the inboard lateral part of shell 4 or encircle shell (4) outside sets up, 4 cavitys of shell are filled with emollient, oscillator 1 passes through the unsettled setting of emollient is in 4 cavitys of shell.

The lubricant can be selected as a liquid lubricant or a solid lubricant, more preferably lubricating and regulating oil, can improve the lubricating and damping performance, has stable lubricating and damping effect, no noise and strong reliability, particularly, the lubricating and regulating oil has excellent lubricating and damping effect under certain viscosity at certain temperature, the mutual acting force between the lubricating and regulating agent and the inner wall is in a stable state when sliding, and no sudden change force is generated in the moving process of the magnetic part, so that the lubricating and damping effect is stable, no noise is generated, the lubricating and regulating oil is used for replacing the traditional spring, the problem of fracture of a transmission assembly cannot occur, and the long-term use of the linear motor is ensured.

In some preferred embodiments, the lubricant is a solid lubricant, preferably graphite, which can improve damping and lubrication in high temperature use environments.

Still include sleeve 5, sleeve 5 is fixed to be set up 4 cavity inner walls of shell, sleeve 5 encircles the side setting of oscillator 1.

The sleeve is arranged to isolate the part of the vibrator which is likely to generate friction from the shell, and the shell is not damaged in the vibration process of the vibrator, so that the thickness of the shell is reduced on the premise of ensuring the structural strength, the structural volume of the linear motor is reduced, and the occupied volume required in an application scene is reduced.

In some preferred embodiments, an FPC board or a PCB board, preferably an FPC board, is connected to the coil for supplying an alternating voltage to the coil.

The working principle is as follows: the utility model provides a broadband linear motor, use and provide the vibration function in portable electronic equipment such as cell-phone, palm game machine, through set up the stator respectively at the shell tip, including first magnetic part and second magnetic part, set up a balanced magnetic field in the shell inside, for the design of magnetic field when inclining, the utility model discloses a vibrator can be at the vibration effect that the littleer scope of advancing provided to realize providing more even vibration volume response in the broad frequency band scope, thereby provide abundanter, more exquisite tactile feedback for the customer; particularly, the vibration feedback with completely different levels and different feelings can be provided in different virtual scenes in the entertainment equipment, and the realistic experience of the entertainment equipment user is improved.

The utility model discloses the structure of well oscillator is core rod connection magnetism spare, and the core rod outside is provided with the coil, and the coil passes through the FPC board power supply, and when the FPC board provides the alternating current for the coil, the frequency of voltage is the same with the natural frequency of oscillator, and at this moment, the oscillator specifically is the electromagnetic force that the core rod position received a periodic variation, and the frequency of its electromagnetic force equals the natural frequency of oscillator, and under the effect of periodic electromagnetic force, the oscillator produces very strong resonance. The utility model discloses in set up the stationary blade on the oscillator, through a rigidity piece with central magnetic part and tip magnetic part fixed connection, absorb the load that pulling force and shearing force brought, increase structural strength, avoid the fracture risk.

The utility model provides a pair of wide band linear motor and traditional linear motor's vibration volume test result is shown in fig. 5, can see out, the utility model provides a pair of wide band linear motor can provide the vibration effect more than 0.4G (the vibration volume that the people can perceive) in the frequency range of broad to can provide higher resonance vibration volume.

It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A broadband linear motor, comprising:

the vibrator (1) comprises two end faces and a side face;

the stator (2) comprises a first magnetic part and a second magnetic part, the first magnetic part and the second magnetic part are respectively arranged on two sides of the vibrator (1) and are respectively arranged opposite to two end faces of the vibrator (1);

the coil (3), the coil (3) encircles the side of the oscillator (1) and sets up.

2. The broadband linear motor of claim 1, wherein the first and second magnetic members are configured as a plate.

3. The broadband linear motor according to claim 1 or 2, wherein the vibrator (1) comprises a central magnetic member (11), a plurality of end magnetic members (12), and the number of the end magnetic members (12) is even; the end magnetic parts (12) are symmetrically arranged on two sides of the central magnetic part (11).

4. The broadband linear motor according to claim 3, wherein the end magnetic members (12) and the central magnetic member (11) are fixedly connected through a core rod (13), and the end magnetic members (12) arranged adjacently are connected through the core rod (13); the range of the coil (3) surrounding the vibrator (1) comprises the core rod (13).

5. The broadband linear motor according to claim 4, wherein the stator (2) is arranged opposite to the end magnetic part (12), and the size of the end face of the stator (2) is larger than or equal to that of the end magnetic part (12).

6. The broadband linear motor according to claim 3, wherein the vibrator (1) further comprises a fixing plate (14), and the fixing plate (14) is fixedly connected with the central magnetic part (11) and the end magnetic part (12).

7. The broadband linear motor according to claim 6, wherein the thickness of the fixing plate (14) is 0.01-0.3 mm.

8. The broadband linear motor according to claim 6, wherein the material of the stator (14) is a non-magnetic stainless steel material, a non-magnetic alloy material or a non-magnetic polymer material.

9. The broadband linear motor according to claim 1, further comprising a housing (4), wherein the stator (2) is fixedly disposed at an inner end of the housing (4), the coil (3) is disposed at an inner side of the housing (4) or disposed around an outer side of the housing (4), a cavity of the housing (4) is filled with a lubricant, and the vibrator (1) is suspended in the cavity of the housing (4) through the lubricant.

10. The broadband linear motor according to claim 9, further comprising a sleeve (5), wherein the sleeve (5) is fixedly disposed on an inner wall of the cavity of the housing (4), and the sleeve (5) is disposed around a side surface of the vibrator (1).

11. The broadband linear motor of claim 2, wherein the first and second magnetic members are configured as a plate with a central opening.