CN211744310U - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN211744310U CN211744310U CN201922340758.0U CN201922340758U CN211744310U CN 211744310 U CN211744310 U CN 211744310U CN 201922340758 U CN201922340758 U CN 201922340758U CN 211744310 U CN211744310 U CN 211744310U
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Abstract
The utility model provides a linear vibration motor, which comprises a guide shell, a vibration unit, a coil unit, an auxiliary magnetic steel unit and a conductive damping unit, wherein the guide shell comprises a body and a guide channel penetrating through the body; the vibration unit is accommodated in the guide channel and forms sliding connection, and comprises a magnetic steel unit; the coil unit is sleeved outside the guide shell and used for driving the vibration unit to vibrate along the axial direction of the guide channel; the auxiliary magnetic steel units are fixed on the guide shell and are arranged at intervals with the vibration unit, and the auxiliary magnetic steel units comprise two groups and are respectively arranged on two opposite sides of the coil unit along the vibration direction; the conductive damping unit is sleeved on the guide shell, the auxiliary magnetic steel unit is positioned in the magnetic field of the magnetic steel unit to generate vibration restoring force for restoring the vibration displacement of the vibration unit, and the conductive damping unit is positioned in the magnetic field of the magnetic steel unit to generate damping force for blocking the movement of the vibration unit. Compared with the prior art, the utility model discloses a linear vibration motor vibration performance is better.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a motor especially relates to a linear vibrating motor of application in mobile electronic product field.
[ background of the invention ]
With the development of electronic technology, portable consumer electronic products, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, are more and more sought after by people, and these electronic products generally use linear vibration motors to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like. Such a wide application requires a vibration motor having excellent performance and a long service life.
A linear vibration motor of the related art includes a base having an accommodating space, a vibration unit, an elastic member or a bearing fixed to the base and suspending the vibration unit in the accommodating space, and a coil unit fixed to the base to drive the vibration unit to vibrate, and the vibration unit is driven to perform a reciprocating linear motion to generate vibration by an interaction between an electric field generated by the coil unit and a magnetic field generated by the vibration unit.
However, in the linear vibration motor of the related art, when the supporting vibration unit uses the metal elastic component, the elastic component has a small vibration displacement, and cannot provide more vibration experience.
Therefore, it is necessary to provide a new linear vibration motor to solve the above problems.
[ Utility model ] content
An object of the utility model is to provide a linear vibration motor that the sense of vibration performance is better.
In order to achieve the above object, the present invention provides a linear vibration motor, which includes:
a guide housing including a body and a guide passage extending through the body;
the vibration unit is accommodated in the guide channel and forms sliding connection, and comprises a magnetic steel unit;
the coil unit is sleeved on the outer side of the guide shell and used for driving the vibration unit to vibrate along the axial direction of the guide channel;
the auxiliary magnetic steel unit is fixed on the guide shell and is arranged at an interval with the vibration unit, and the auxiliary magnetic steel unit is positioned in a magnetic field of the magnetic steel unit to generate a vibration restoring force for restoring the vibration displacement of the vibration unit; the auxiliary magnetic steel units comprise two groups and are respectively arranged on two opposite sides of the coil unit along the vibration direction of the vibration unit; and the number of the first and second groups,
the conductive damping unit is sleeved on the guide shell and is positioned in a magnetic field of the magnetic steel unit so as to generate damping force for blocking the vibration unit to move.
Preferably, the conductive damping unit at least partially covers the coil unit.
Preferably, the conductive damping unit comprises an upper damping unit and a lower damping unit which are oppositely arranged, and the upper damping unit and the lower damping unit are respectively arranged on two opposite sides of the coil unit along the direction perpendicular to the vibration direction and are completely attached to the coil unit.
Preferably, two of the conductive damping units cover a portion of the coil unit.
Preferably, the magnetic steel unit comprises magnetic steel and a soft magnetic block attached to the magnetic pole of the magnetic steel.
Preferably, the magnetic steels comprise two, and the soft magnetic blocks are clamped and fixed between the two magnetic steels.
Preferably, the vibration unit further comprises a mass block, and the mass block is attached to one side, away from the soft magnetic block, of the magnetic steel along the vibration direction.
Preferably, the magnetizing directions of the two magnetic steels are both parallel to the vibration direction, and the magnetizing directions are opposite; each group of auxiliary magnetic steel units comprises two auxiliary magnetic steels and is respectively arranged on two opposite sides of the vibration unit along the direction perpendicular to the vibration direction; the magnetizing directions of the two auxiliary magnetic steels of the auxiliary magnetic steel units are perpendicular to the vibration direction, and the magnetic poles of one side, close to the magnetic steels, of the auxiliary magnetic steels are opposite to the magnetic poles of one end, far away from the soft magnetic block, of the magnetic steels.
Preferably, the linear vibration motor further includes two shell plates fixed to the guide housing, the two shell plates are respectively located at opposite ends of the guide housing in an axial direction of the guide passage, and the shell plates at least partially cover the guide passage.
Preferably, the outer surface of the guide housing is recessed to form two groups of first receiving grooves and an annular second receiving groove, the two groups of first receiving grooves are arranged on two opposite sides of the second receiving groove at intervals along the vibration direction, the two groups of auxiliary magnetic steel units are respectively received and fixed in the two groups of first receiving grooves, and the coil unit and the conductive damping unit are received and fixed in the second receiving groove.
Compared with the prior art, the utility model discloses increasing increase conductive damping unit again on the basis of supplementary magnet steel unit, conductive damping unit cover is located the direction casing. When the vibration unit vibrates, the magnet steel moves along with the vibration of the vibration unit, and simultaneously the magnetic field that the magnet steel formed also moves along with, the magnetic field intensity at different positions of the conductive damping unit consequently also changes, and at the moment, the conductive damping unit generates local eddy current, thereby generating the back electromotive force that hinders the vibration of the vibration unit, namely generating the damping force that hinders the motion of the vibration unit. The damping force is along with the vibration of vibration unit changes, consequently the utility model discloses can provide better vibration performance, the reliability is better.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings 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 without inventive work, wherein:
fig. 1 is a schematic view of a partially exploded structure of a linear vibration motor according to the present invention;
fig. 2 is a schematic perspective view of the linear vibration motor of the present invention;
fig. 3 is a cross-sectional view taken along line a-a of fig. 2 according to the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a linear vibration motor 100, which includes a guide housing 1, a vibration unit 2, a coil unit 3, an auxiliary magnetic steel unit 4, an outer shell 5, and a conductive damping unit 6.
The guide housing 1 includes a body 11, a guide passage 12 penetrating the body 11, a first receiving groove 13 formed by recessing an outer surface of the guide housing 1, and a second receiving groove 14 having a ring shape.
The guide passage 12 is used to accommodate the vibration unit 2 and provide a vibration space for the vibration unit 2.
In this embodiment, the first receiving grooves 13 include two sets and are disposed at opposite sides of the second receiving groove 14 at intervals along the vibration direction of the vibration unit 2; the first accommodating groove 13 is used for accommodating the auxiliary magnetic steel unit 4, and the second accommodating groove 14 is used for accommodating the coil unit 3 and the conductive damping unit 6. The vibration unit 2 is accommodated in the guide passage 12 and is slidably coupled to form a sliding type vibration mode.
The vibration unit 2 includes a magnetic steel unit 21 and a mass block 22.
The magnetic steel unit 21 is used for interacting with the coil unit 3 to provide driving force.
In this embodiment, the magnetic steel unit 21 includes a magnetic steel 211 and a soft magnetic block 212 attached to a magnetic pole of the magnetic steel 211. Specifically, the magnetic steels 211 include two; the soft magnetic block 212 is clamped and fixed between the two magnetic steels 211 and is used for magnetic conduction. Of course, the number of the magnetic steel 211 and the soft magnetic blocks 212 is not limited to the above example.
The mass 22 is used as a counterweight to increase the weight of the vibration unit 2, so as to improve the vibration amplitude of the vibration unit 2 and improve the vibration performance.
In this embodiment, the mass block 22 includes two and is attached to one side of the magnetic steel 211 away from the soft magnetic block 212 along the vibration direction.
The coil unit 3 is sleeved on the outer side of the guide shell 1 and used for driving the vibration unit 2 to vibrate along the axial direction of the guide channel 1.
In the present embodiment, the coil unit 3 is accommodated and fixed in the second accommodation groove 14. On the one hand, the fixing effect can be enhanced, and on the other hand, the entire volume of the linear vibration motor 100 can be reduced.
The auxiliary magnetic steel unit 4 is fixed on the guide shell 1 and is arranged at an interval with the vibration unit 2. The auxiliary magnetic steel unit 4 acts as a magnetic spring structure, and is located in the magnetic field of the magnetic steel unit 21 to generate a vibration restoring force for restoring the vibration displacement of the vibration unit 2, that is, to provide a restoring force for the reciprocating vibration of the vibration unit in the horizontal vibration direction.
In this embodiment, the auxiliary magnetic steel unit 4 includes two sets, and the vibration directions of the vibration unit 2 are respectively disposed on two opposite sides of the coil unit 3.
Specifically, each group of the auxiliary magnetic steel unit 4 includes two auxiliary magnetic steels 41, and the two auxiliary magnetic steels 41 are respectively disposed on two opposite sides of the vibration unit 2 along a direction perpendicular to the vibration direction. Of course, the structure and number of each set of auxiliary magnetic steel units 4 are not limited to the above examples.
In this embodiment, the two sets of auxiliary magnetic steel units 4 are respectively accommodated and fixed in the two sets of first accommodating grooves 13. On the one hand, the fixing effect can be enhanced, and on the other hand, the entire volume of the linear vibration motor 100 can be reduced.
As shown in fig. 3, in the present embodiment, the magnetizing directions of the two magnetic steels 211 of the magnetic steel unit 21 are both parallel to the vibration direction, and the magnetizing directions are opposite; the magnetizing directions of the two groups of auxiliary magnetic steel units 4 are the same, the magnetizing directions of the auxiliary magnetic steels 41 in each group of auxiliary magnetic steel units 4 are perpendicular to the vibration direction, and the magnetic poles of one side, close to the magnetic steel 211, of the auxiliary magnetic steel 41 are opposite to the magnetic poles of one end, far away from the soft magnetic block 212, of the magnetic steel 211.
The conductive damping unit 6 is sleeved on the guide housing 1, at least partially covers the coil unit 3, and is accommodated in the second accommodating groove 14 together with the coil unit 3, so that the overall size of the linear vibration motor 100 can be reduced. The conductive damping unit 6 is made of a material with high conductivity, such as copper, but may be made of other metal materials; therefore, the conductive damping unit 6 is less affected by the surrounding environment, for example, is not affected by the temperature and humidity, so that the performance of the linear vibration motor 100 is more stable.
In this embodiment, the conductive damping unit 6 includes an upper damping unit 61 and a lower damping unit 62 which are oppositely arranged, the upper damping unit 61 and the lower damping unit 62 are respectively arranged on two opposite sides of the coil unit 3 along a direction perpendicular to the vibration direction and completely attached to the coil unit 3, and the upper damping unit 61 and the lower damping unit 62 cover a part of the coil unit; of course, the conductive damping unit 6 may be an integrally formed structure.
Specifically, when vibration unit 2 is in coil unit 3 with vibrate under the magnetic field of magnet steel unit 21, drive magnetic field removes, and the magnetic field intensity of the different positions of electrically conductive damping unit 6 also along with the removal of magnetic field changes this moment, electrically conductive damping unit 6 produces local vortex, thereby produces and hinders the back electromotive force of vibration unit 2 vibration, consequently produces the electromagnetic damping effect, can be along with the size of vibration unit 2 vibration provides different damping force.
In addition, since the peripheral position of the coil unit 3 is the position where the electromagnetic field changes most, when the conductive damping unit 6 is located near the coil unit 3, a higher electromagnetic damping effect can be achieved, that is, a better damping force can be provided, and the linear vibration motor 100 is occupied with a smaller volume.
The shell plate 5 includes two and is fixed in respectively the body 11 of direction casing 1, two the shell plate 5 is followed the axial of direction passageway 12 is located respectively the relative both ends of direction casing 1, be fixed in the relative both ends of body 11 promptly, just the shell plate 5 at least part covers direction passageway 12. In the present embodiment, both housing plates 5 completely cover the guide passage 12.
When using this linear vibration motor 100, can adjust the vibration displacement of vibration unit 2 according to different voltages to obtain different vibration intensity, and be different from traditional motor, the utility model discloses a linear vibration motor 100 forms slidingtype magnetic spring vibration structure, under certain high voltage, can make vibration unit 2 collide with 5 with outer skin plates in order to obtain the collision effect, brings more user experience.
Compared with the prior art, the utility model discloses increasing increase conductive damping unit again on the basis of supplementary magnet steel unit, conductive damping unit cover is located the direction casing. When the vibration unit vibrates, the magnet steel moves along with the vibration of the vibration unit, and simultaneously the magnetic field that the magnet steel formed also moves along with, the magnetic field intensity at different positions of the conductive damping unit consequently also changes, and at the moment, the conductive damping unit generates local eddy current, thereby generating the back electromotive force that hinders the vibration of the vibration unit, namely generating the damping force that hinders the motion of the vibration unit. The damping force is along with the vibration of vibration unit changes, consequently the utility model discloses can provide better vibration performance, the reliability is better.
The utility model provides an above only do the embodiment of the utility model not consequently the restriction the patent scope of the utility model, all utilize the utility model discloses equivalent structure or equivalent flow transform that the content of description and drawing was done, or direct or indirect application is in other relevant technical field, all the same reason is included the utility model discloses an in the patent protection scope.
Claims (10)
1. A linear vibration motor, characterized by comprising:
a guide housing including a body and a guide passage extending through the body;
the vibration unit is accommodated in the guide channel and forms sliding connection, and comprises a magnetic steel unit;
the coil unit is sleeved on the outer side of the guide shell and used for driving the vibration unit to vibrate along the axial direction of the guide channel;
the auxiliary magnetic steel unit is fixed on the guide shell and is arranged at an interval with the vibration unit, and the auxiliary magnetic steel unit is positioned in a magnetic field of the magnetic steel unit to generate a vibration restoring force for restoring the vibration displacement of the vibration unit; the auxiliary magnetic steel units comprise two groups and are respectively arranged on two opposite sides of the coil unit along the vibration direction of the vibration unit; and the number of the first and second groups,
the conductive damping unit is sleeved on the guide shell and is positioned in a magnetic field of the magnetic steel unit so as to generate damping force for blocking the vibration unit to move.
2. The linear vibration motor of claim 1, wherein the conductive damping unit at least partially covers the coil unit.
3. The linear vibration motor of claim 2, wherein the conductive damping unit includes an upper damping unit and a lower damping unit which are oppositely disposed, and the upper damping unit and the lower damping unit are respectively disposed at opposite sides of the coil unit along a direction perpendicular to the vibration direction and completely attached to the coil unit.
4. The linear vibration motor of claim 3, wherein two of the conductive damping units cover a portion of the coil unit.
5. The linear vibration motor of claim 1, wherein the magnetic steel unit includes a magnetic steel and a soft magnet attached to a magnetic pole of the magnetic steel.
6. The linear vibration motor according to claim 5, wherein the magnetic steels include two magnetic steels, and the soft magnetic block is sandwiched and fixed between the two magnetic steels.
7. The linear vibration motor of claim 6, wherein the vibration unit further comprises a mass block, and the mass block is attached to one side of the magnetic steel, which is far away from the soft magnetic block, along the vibration direction.
8. The linear vibration motor of claim 6, wherein the magnetizing directions of the two magnetic steels are parallel to the vibration direction and opposite to each other; each group of auxiliary magnetic steel units comprises two auxiliary magnetic steels and is respectively arranged on two opposite sides of the vibration unit along the direction perpendicular to the vibration direction; the magnetizing directions of the two auxiliary magnetic steels of the auxiliary magnetic steel units are perpendicular to the vibration direction, and the magnetic poles of one side, close to the magnetic steels, of the auxiliary magnetic steels are opposite to the magnetic poles of one end, far away from the soft magnetic block, of the magnetic steels.
9. The linear vibration motor according to claim 1, further comprising two shell plates fixed to the guide housing, the two shell plates being respectively located at opposite ends of the guide housing in an axial direction of the guide passage, and the shell plates at least partially covering the guide passage.
10. The linear vibration motor of claim 3, wherein the outer surface of the guide housing is recessed to form two sets of first receiving grooves and a ring-shaped second receiving groove, the two sets of first receiving grooves are spaced apart from each other along the vibration direction on opposite sides of the second receiving groove, the two sets of auxiliary magnetic steel units are respectively received and fixed in the two sets of first receiving grooves, and the coil unit and the conductive damping unit are received and fixed in the second receiving groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340758.0U CN211744310U (en) | 2019-12-23 | 2019-12-23 | Linear vibration motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340758.0U CN211744310U (en) | 2019-12-23 | 2019-12-23 | Linear vibration motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211744310U true CN211744310U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922340758.0U Expired - Fee Related CN211744310U (en) | 2019-12-23 | 2019-12-23 | Linear vibration motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211744310U (en) |
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2019
- 2019-12-23 CN CN201922340758.0U patent/CN211744310U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201023 Termination date: 20211223 |