CN216751489U

CN216751489U - Miniature column low frequency vibrator

Info

Publication number: CN216751489U
Application number: CN202122887100.9U
Authority: CN
Inventors: 刘强
Original assignee: Chizhoushi Honggang Science And Technology Electronics Co ltd
Current assignee: Chizhoushi Honggang Science And Technology Electronics Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-06-14
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses a miniature columnar low-frequency vibrator, and belongs to the technical field of vibrators. The magnetic conduction area is formed by laminating a plurality of thinner magnetic conduction sheets, so that the eddy current loss can be effectively reduced; the outermost layer of the column body is provided with the magnetic protection sleeve, so that the magnetic induction intensity of a working air gap can be improved, an internal magnetic field can be shielded, and the electromagnetic interference on peripheral electronic components is avoided; the vibrator is positioned at two ends of the positioning shaft, so that the running is more stable; the repulsion characteristic of the same polarity of the magnetic steel is utilized to replace the traditional elastic sheet or other elastic elements, so that wider frequency response can be obtained, and the service life can be prolonged.

Description

Miniature columnar low-frequency vibrator

Technical Field

The utility model relates to the field of vibrators, in particular to a vibrator which is small in size, low in response frequency lower than 500Hz and large in impact force.

Background

In all electro-acoustic equipment, an audio signal is restored into sound through the vibration of a sound film of a loudspeaker, and if super bass and bass (below 200 Hz) are reflected, a loudspeaker with a large caliber is obtained. For the head-wearing earphone and the small-sized sound equipment, because of the limitation of the installation space, the loudspeaker of the overweight and bass can not be installed, and the earphone can only be taken into consideration by the intermediate frequency loudspeaker, so that the dynamic and shocking effects of the overweight and bass can not be embodied.

On a game handle, an electronic contest peripheral and a VR helmet, a direct-current eccentric motor is mostly adopted to provide vibration, and a vibration feedback function is also introduced into an automobile steering wheel, a seat and a central control touch screen. However, the prior common vibrator plate has the defects of large volume, small impact force and delayed response.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vibrator which has small installation volume and high low-frequency responsivity aiming at the insufficient expressive force of bass and subwoofer of a headset and small-sized acoustic equipment, can be directly driven by audio frequency and compensates the dynamic effect of the subwoofer and the subwoofer of the small-sized acoustic equipment.

The technical problem to be solved by the utility model is realized by adopting the following technical scheme:

the utility model provides a miniature column low frequency vibrator, includes the end cover of both sides, the stator is established in end cover hole bottom, the end cover terminal surface butt joint of both sides forms the cavity, the oscillator is arranged in the cavity, the stator is the same with the just right face polarity of oscillator, the coil cover is in on the end cover.

The further technology of the utility model is as follows:

preferably, the stator comprises stator magnetic steel, and the stator magnetic steel is arranged at the bottom of an inner hole of the end cover.

Preferably, the oscillator includes oscillator magnet steel, a plurality of magnetic conduction piece, sleeve pipe and location axle, and is a plurality of magnetic conduction piece is in the same place and is constituted the magnetic conduction post, respectively has folded a slice oscillator magnet steel in its axial both sides, and two oscillator magnet steel's opposite face polarity is the same, the sleeve pipe is in the centre bore of magnetic conduction piece and oscillator magnet steel, and the location axle is riveted in sheathed tube centre bore, the end cover center is equipped with the locating hole, location axle both ends with the locating hole cooperation of end cover.

Preferably, the magnetic conductive sheets are 4 sheets.

Preferably, the frequency response of the micro columnar low-frequency vibrator is set to be 30-500 Hz.

Preferably, the frequency response of the miniature columnar low-frequency vibrator is set to be 45-150 Hz.

Preferably, the bottom surface of the end cover is provided with an exhaust hole.

Preferably, the end covers are provided with steps and clamping grooves, the clamping grooves are used for butt joint of end cover end faces on two sides, and the steps are used for placing coils.

Preferably, the steps of the end covers on two sides form a placing groove, and the coil is sleeved in the placing groove.

Preferably, the miniature columnar low-frequency vibrator further comprises a magnetic protecting sleeve, two ends of the magnetic protecting sleeve are respectively sleeved on the two end covers and cover the coil, the magnetic protecting sleeve and the end covers are bonded or riveted and fixed through glue, a small hole is formed in the magnetic protecting sleeve, and the circuit board is located in the small hole of the magnetic protecting sleeve and fixed through UV glue; and the wire end of the coil is welded on the circuit board and covered and protected by UV glue.

Preferably, the working principle is as follows: the polarities of the positive surfaces and the opposite surfaces of the adjacent stator magnetic steels and the vibrator magnetic steels are the same, and repulsive forces are generated between the adjacent stator magnetic steels and the vibrator magnetic steels; the repulsion on the two sides of the vibrator is equal in magnitude and opposite in direction, the vibrator is in a balanced state, and a magnetic loop is formed between the vibrator magnetic steel and the magnetic protection sleeve; when direct current drive is applied to the coil, under the action of a magnetic field, electromagnetic force of interaction is generated between the coil and the vibrator along the axial direction; under the action of electromagnetic force, the vibrator generates displacement along the axial direction, meanwhile, the distance between the stator magnetic steel and the vibrator magnetic steel on the two axial sides of the vibrator is changed, the repulsive force between the stator magnetic steel and the vibrator magnetic steel is changed, the repulsive force with the increased distance is reduced, and the repulsive force with the decreased distance is increased; when the resultant force of repulsive forces on two sides of the vibrator in the axial direction is equal to the electromagnetic force, the vibrator reaches new balance, when alternating current drive is applied to the coil, the vibrator can generate axial reciprocating motion, which is externally shown as axial vibration, and when the frequency of the drive current is consistent with the inherent frequency of the vibrator, strong resonance can be generated.

The utility model also provides a game handle, a computer peripheral, a VR helmet, an automobile steering wheel, a seat or a central control touch screen which utilizes the miniature columnar low-frequency vibrator.

The utility model has the following technical effects:

the utility model adopts the resonance principle, when the frequency of the driving current in the coil is consistent with the response frequency of the vibrator, the quick vibration can be realized, the overweight bass and bass components in the audio signal are converted into vibration output, and the dynamic and shocking effect is shown.

If the fixed frequency drive is adopted near the resonance point, the quick response and the larger impact force can be obtained; the vibration feedback device can be used for providing vibration feedback for game handles, electronic contest peripherals, VR helmets, automobile steering wheels, seats, central control touch screens and the like.

The utility model utilizes the repulsion characteristic of the same polarity of the magnetic steel to replace the traditional spring plate structure, thereby effectively prolonging the service life. Meanwhile, the central shaft is adopted for positioning, so that the operation is more stable and the noise is less.

The utility model is provided with the magnetic protection sleeve, improves the vibration conversion efficiency, has smaller volume compared with the traditional product, and also has the magnetic shielding function, thereby effectively reducing the electromagnetic interference.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and 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 the drawings without creative efforts;

fig. 1 is a schematic cross-sectional view of a micro-pillar low-frequency vibrator according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a micro-pillar low-frequency vibrator according to an embodiment of the present invention;

fig. 3 is an exploded view of a structure of a micro-pillar low-frequency vibrator according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a stator structure according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a stator structure provided in an embodiment of the present invention;

fig. 6 is a schematic diagram of a vibrator according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a vibrator structure according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating an assembly of a micro-pillar low-frequency vibrator according to an embodiment of the present invention;

fig. 9 is a schematic view of a vibration principle of a micro-pillar low-frequency vibrator according to an embodiment of the present invention;

the designations in the above figures illustrate: 11. an end cap; 12. stator magnetic steel; 13. positioning holes; 21. a vibrator magnet steel; 22. a magnetic conductive sheet; 23. a sleeve; 24. positioning the shaft; 31. a coil; 32. a magnetic protection sleeve; 33. a circuit board; 10. a stator; 20. and a vibrator.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.

In order to achieve the above object, the present invention adopts the following technical solutions: as shown in fig. 1 to 8, a miniature columnar low-frequency vibrator, comprising: the motor comprises an end cover 11, stator magnetic steel 12, vibrator magnetic steel 21, a magnetic conductive sheet 22, a sleeve 23, a positioning shaft 24, a coil 31, a magnetic protection sleeve 32, a circuit board 33, a stator 10 and a vibrator 20;

the end cover 11 is made of a plastic material with high self-lubricating performance, the stator magnetic steel 12 is clamped into the bottom of an inner cavity of the end cover 11 and is fixed by glue, and the stator 10 of the vibrator is formed.

The magnetic conductive sheets 22 are stacked together, two sides of the magnetic conductive sheets are respectively stacked with one of the vibrator magnetic steels 21, the polarities of the positive and opposite surfaces of the two magnetic steels are the same, the two magnetic steels are riveted together through the sleeve 23, and the positioning shaft 24 is riveted in a central hole of the sleeve 23 to form the vibrator 20 of the vibrator.

The two stators 10 are positioned and butted through the magnetic protection sleeve 32 to form a cavity, the vibrator 20 is arranged in the cavity of the stator 10, the positioning shaft 24 is matched with the positioning hole 13 of the end cover 11 to realize axial positioning, and the positioning shaft 24 and the positioning hole 13 are in slide fit to ensure that the vibrator 20 can freely slide in the axial direction; the polarities of the positive and opposite surfaces of the stator magnetic steel 12 and the vibrator magnetic steel 21 are the same, and repulsive force is generated between the stator magnetic steel and the vibrator magnetic steel; the coil 31 is sleeved on the stator 10, is positioned in a working air gap formed by the vibrator 20 and the magnetic protection sleeve 32, and is bonded and fixed by glue; the stator 10 and the magnetic protection sleeve 32 are fixed by gluing or riveting; the circuit board 33 is arranged in the gap of the magnetic protection sleeve 32, the wire end of the coil 31 is welded on the circuit board 33, and the circuit board is covered by UV glue for protection, so that the vibrator is formed.

When the coil 31 is energized, electromagnetic force is generated in the axial direction of the vibrator 20 to drive the vibrator 20 to generate axial displacement, the distance between the stator magnetic steel 12 and the vibrator magnetic steel 21 is changed, so that the repulsive force between the stator magnetic steel and the vibrator magnetic steel is changed, and the larger the displacement is, the larger the repulsive force is, the effect similar to that of a traditional product spring plate is achieved; when the driving current is alternated, the vibrator can generate vibration output; because the repulsion force between the magnetic steels is more flexible than the elastic sheets, wider response frequency can be obtained.

The most sensitive response area of the vibrator is set to be 45-150 Hz; different response characteristics can be obtained by changing the thicknesses of the stator magnetic steel 12 and the vibrator magnetic steel 21 or changing the distance between the stator magnetic steel and the vibrator magnetic steel.

The magnetic conductive sheet 22 is made of low-carbon steel with high magnetic permeability and formed by stacking a plurality of thin sheets, so that the eddy current loss can be effectively reduced.

The sleeve 23 and the positioning shaft 24 are made of copper materials, and the purpose is to reduce the magnetic permeability of the central part and make the magnetic field concentrated to the working air gap as much as possible.

The magnetic protection sleeve 32 is made of low-carbon steel with high magnetic permeability, and a closed magnetic circuit is formed between the vibrator 20 and the magnetic protection sleeve 32, so that the maximum magnetic induction intensity is obtained between working air gaps formed by the vibrator and the magnetic protection sleeve, and the conversion efficiency of the vibrator is improved; the magnetic protection sleeve 32 also has a shielding effect, so that external electromagnetic radiation can be effectively reduced, and interference on peripheral electronic components is avoided.

As shown in fig. 9, the polarities of the adjacent stator magnetic steels 12 and the opposite sides of the oscillator magnetic steel 21 are the same, and a repulsive force is generated between the adjacent stator magnetic steels and the oscillator magnetic steels; since the repulsion forces on both sides of the vibrator 20 are equal and opposite, the vibrator 20 is in a balanced state. The coil 31 is positioned in a working air gap formed by the vibrator 20 and the magnetic protection sleeve 32, and a magnetic loop is formed between the vibrator magnetic steel 21 and the magnetic protection sleeve 32; when direct current is applied to the coil 31 for driving, under the action of the magnetic field, electromagnetic force of interaction is generated between the coil 31 and the vibrator 20 along the axial direction; under the action of electromagnetic force, the vibrator 20 generates displacement along the axial direction, meanwhile, the distance between the stator magnetic steel 12 and the vibrator magnetic steel 21 on the two axial sides of the vibrator 20 is changed, the repulsive force between the stator magnetic steel and the vibrator magnetic steel is changed, the repulsive force with the increased distance is reduced, and the repulsive force with the decreased distance is increased; when the resultant force of the repulsive forces on the two sides of the vibrator 20 in the axial direction is equal to the electromagnetic force, the vibrator 20 reaches a new balance. When alternating current drive is applied to the coil 31, the vibrator 20 generates axial reciprocating motion, which is externally represented as axial vibration. When the frequency of the drive current coincides with the natural frequency of the vibrator 20, strong resonance occurs.

The utility model can also be driven by pulsating direct current (PWM) or sine wave current to replace a direct current eccentric vibration motor on a game handle, an electronic competition peripheral and a VR helmet, thereby overcoming the defects of insufficient impact force and response delay. Meanwhile, the utility model can also meet the requirement of emerging vibration feedback function in the automobile industry.

In the embodiment of the present invention, the circuit board 33 may be changed into a flexible circuit board 33, and the flexible circuit board 33 is adhered to the cylindrical surface of the magnetic shield 32, so that a larger area can be obtained, and a driving circuit may be disposed thereon, and the driving circuit is implemented by using a chip or a separate element, which is not limited herein.

In the embodiment of the present invention, a powder metallurgy bearing may be inserted into the positioning hole 13 of the end cap 11, so as to obtain higher temperature resistance and meet the use requirements of special environments.

It should be noted that, in the embodiment of the present invention, multiple sets of vibrators 20 may be cascaded to obtain a larger impact force.

In the embodiment of the present invention, the tower spring is added to the stator magnetic steel 12 and the vibrator magnetic steel 21, so that the natural frequency of the vibrator 20 can be increased.

It should be noted that in the embodiment of the present invention, 2 parallel positioning shafts 24 can be provided to form a rotation stop, so that the shape of the vibrator can be made into a square or other shape to meet the individual requirements of the market.

The utility model also discloses a game handle, a computer peripheral, a VR helmet, an automobile steering wheel, a seat or a central control touch screen which utilizes the miniature columnar low-frequency vibrator.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the present invention, features are not necessarily present in isolation, but are interleaved with each other unless explicitly stated or limited. The foregoing shows and describes the principles, essential features, and advantages of the utility model. Those skilled in the art should appreciate that the present invention is not limited to the above-described embodiments, and the above-described embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention to the only choice. The utility model may be further modified and optimized within the spirit and scope of the appended claims, all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A miniature columnar low-frequency vibrator is characterized in that: including end cover (11) of both sides, establish end cover (11) hole bottom stator (10), end cover (11) terminal surface butt joint of both sides forms the cavity, and in the cavity was arranged in oscillator (20), stator (10) was the same with oscillator (20) just right face polarity, and coil (31) cover is in on end cover (11).

2. A miniature cylindrical low frequency vibrator according to claim 1, wherein: the stator (10) comprises stator magnetic steel (12), and the stator magnetic steel (12) is arranged at the bottom of an inner hole of the end cover (11).

3. A miniature cylindrical low frequency vibrator according to claim 1, wherein: oscillator (20) are including oscillator magnet steel (21), a plurality of magnetic conduction piece (22), sleeve pipe (23) and location axle (24), and are a plurality of magnetic conduction piece (22) are folded together and are constituted magnetic conduction post, respectively fold a slice oscillator magnet steel (21) in its axial both sides, and the positive opposite face polarity of two oscillator magnet steel (21) is the same, sleeve pipe (23) are in the centre bore of magnetic conduction piece (22) and oscillator magnet steel (21), and location axle (24) are riveted in the centre bore of sleeve pipe (23), end cover (11) center is equipped with locating hole (13), location axle (24) both ends with locating hole (13) the cooperation of end cover (11).

4. A miniature cylindrical low frequency vibrator according to claim 3, wherein: 4 magnetic conductive sheets (22) are selected.

5. The miniature cylindrical low frequency vibrator of claim 1, wherein: and the bottom surface of the end cover (11) is provided with an exhaust hole.

6. The miniature cylindrical low frequency vibrator of claim 1, wherein: the end covers (11) are provided with steps and clamping grooves, the clamping grooves are used for butt joint of end faces of the end covers (11) on two sides, and the steps are used for placing coils (31).

7. The miniature cylindrical low frequency vibrator according to claim 6, wherein: the steps of the end covers (11) on the two sides form a placing groove, and the coils (31) are sleeved in the placing groove.

8. The miniature cylindrical low frequency vibrator of claim 1, wherein: the miniature columnar low-frequency vibrator further comprises a magnetic protection sleeve (32), two ends of the magnetic protection sleeve (32) are respectively sleeved on the two end covers (11) and cover the coil (31), the magnetic protection sleeve (32) and the end covers (11) are bonded or riveted and fixed through glue, a small hole is formed in the magnetic protection sleeve (32), and the circuit board (33) is located in the small hole of the magnetic protection sleeve (32) and fixed through UV glue; the wire end of the coil (31) is welded on the circuit board (33) and covered and protected by UV glue.