CN113489278B - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN113489278B CN113489278B CN202110727842.7A CN202110727842A CN113489278B CN 113489278 B CN113489278 B CN 113489278B CN 202110727842 A CN202110727842 A CN 202110727842A CN 113489278 B CN113489278 B CN 113489278B
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- coil
- limit
- vibrator assembly
- vibration motor
- vibrator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses a linear vibration motor, which comprises a shell, a stator assembly, a vibrator assembly and an elastic piece, wherein the shell is provided with a containing cavity, the stator assembly, the vibrator assembly and the elastic piece are contained in the containing cavity, the stator assembly comprises a coil fixedly connected with the shell, the vibrator assembly is suspended in the coil through the elastic piece, the axis of the coil is superposed with the vibration direction of the vibrator assembly, and the linear vibration motor further comprises a limiting structure which is used for limiting the displacement distance of the vibrator assembly in the direction vertical to the vibration direction, so that the vibrator assembly cannot be in contact with the coil. Through setting up limit structure for the vibrator subassembly can't contact with the coil in the direction of perpendicular to vibration direction, thereby when reliability test or product accident fall, can not bump between vibrator subassembly and the coil, and then make the coil avoid the damage of vibrator subassembly, improve the life of product.
Description
Technical Field
The invention relates to the technical field of vibration motors. And more particularly, to a linear vibration motor.
Background
At present, the touch feedback technology is more and more widely applied, plays an important role in the interactive experience of electronic products particularly, and can bring real experience of being personally on the scene to people. Among them, the linear vibration motor is one of the main implementation ways of the haptic feedback technology, and is receiving more and more attention.
A related art vibration motor generally includes a vibrator assembly suspended within a stator assembly and reciprocally movable. When the product is subjected to drop test, the vibrator component can impact the stator component due to the inertia effect, so that the stator component is damaged, and the reliability of the product is reduced.
Disclosure of Invention
An object of the present invention is to provide a linear vibration motor capable of preventing a vibrator assembly from colliding with a stator assembly.
According to an aspect of the present invention, there is provided a linear vibration motor, including a housing forming a receiving chamber, and a stator assembly, a vibrator assembly and an elastic member received in the receiving chamber, the stator assembly including a coil fixedly connected to the housing, the vibrator assembly being suspended in the coil by the elastic member, an axis of the coil coinciding with a vibration direction of the vibrator assembly, the linear vibration motor further including a limit structure for limiting displacement of the vibrator assembly in a direction perpendicular to the vibration direction so that the vibrator assembly cannot contact the coil.
Preferably, the limiting structure is arranged on the shell.
Preferably, the limiting structure comprises a plurality of limiting bosses formed by protruding the inner side surface of the housing, and the distance between the limiting bosses and the vibrator assembly is smaller than the distance between the coil and the vibrator assembly.
Preferably, the limiting bosses comprise a plurality of first limiting bosses for limiting the displacement of the vibrator assembly in the direction perpendicular to the horizontal plane, and the first limiting bosses are formed by first folding rings formed by bending the edge of the shell.
Preferably, the first limit bosses are arranged on two opposite side surfaces of the shell along the vibration direction and are respectively positioned on the upper side and the lower side of the vibrator assembly.
Preferably, the oscillator subassembly includes magnet steel, magnetic conduction board and balancing weight all set up two, set up respectively in the relative both sides of magnet steel along the direction of vibration, first spacing boss is located respectively the upper and lower both sides of balancing weight.
Preferably, the number of the coils is two, and the two coils are respectively sleeved on the outer sides of the two magnetic conduction plates.
Preferably, the limiting bosses further comprise a plurality of second limiting bosses for limiting the displacement of the vibrator assembly in the horizontal plane perpendicular to the vibration direction, and the second limiting bosses are arranged on two opposite side faces of the housing in the horizontal plane perpendicular to the vibration direction.
Preferably, the housing includes a U-shaped middle shell, and a lower shell and two side shells enclosing with the middle shell to form the accommodating chamber, the first limit bosses are respectively disposed on the two side shells, and the second limit bosses are respectively disposed on two side walls of the middle shell.
Preferably, the second limit boss is formed by a second folded ring formed by inwards recessing the side wall of the middle shell.
The invention has the following beneficial effects:
according to the linear vibration motor, the limiting structure is arranged, so that the vibrator component cannot be in contact with the coil in the direction perpendicular to the vibration direction, collision cannot occur between the vibrator component and the coil when reliability tests or products fall accidentally, the coil is prevented from being damaged by the vibrator component, and the service life of the products is prolonged.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows an exploded view of the present invention.
Figure 2 shows a cross-sectional view of the present invention.
Fig. 3 shows a partial structural schematic of the present invention.
Fig. 4 shows another partial structure diagram of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Fig. 1 shows an embodiment of a linear vibration motor according to the present invention, which includes a housing formed with a receiving chamber, and a stator assembly 20, a vibrator assembly 30, and an elastic member 40 received in the receiving chamber, wherein the stator assembly 20 includes a coil 21 fixedly connected to the housing and a flexible circuit board 22 for connection to an external circuit, the vibrator assembly 30 is suspended in the coil 21 by the elastic member 40, an axial direction of the coil 21 coincides with a vibration direction of the vibrator assembly 30, that is, one end of the elastic member 40 is connected to the housing, the other end is connected to the vibrator assembly 30, and the coil 21 is sleeved outside the vibrator assembly 30.
The linear vibration motor further includes a limit structure for limiting a displacement distance of the vibrator assembly 30 in a direction perpendicular to the vibration direction such that the vibrator assembly 30 cannot contact the coil 21.
The vibration direction of the vibrator assembly 30 is defined as a first direction, a direction perpendicular to the vibration direction within a horizontal plane is defined as a third direction, and a direction perpendicular to the horizontal plane is defined as a second direction. Because the second direction and the third direction are both perpendicular to the first direction, the limiting structure is used for limiting the displacement of the vibrator assembly 30 in the direction perpendicular to the first direction, that is, the limiting structure is used for limiting the displacement of the vibrator assembly 30 in the second direction and the third direction, so that the vibrator assembly 30 cannot be in contact with the coil 21 in the second direction and the third direction, and therefore, when a reliability test or a product falls off accidentally, the vibrator assembly 30 and the coil 21 cannot collide with each other, the coil 21 is prevented from being damaged by the vibrator assembly 30, and the service life of the product is prolonged.
The limit structure may be disposed on the case and/or the vibrator assembly 30, and the limit structure in this embodiment is disposed on the case, and the limit structure includes a plurality of limit bosses formed by protrusions on an inner side surface of the case, and a distance between the limit bosses and the vibrator assembly 30 is smaller than a distance between the coil 21 and the vibrator assembly 30, and when the vibrator assembly 30 is displaced in the second direction or the third direction, the vibrator assembly 30 first contacts with the limit bosses and is blocked by the limit bosses so as not to contact with the coil 21.
In some embodiments, the stopper boss is provided on the vibrator assembly 30 and the stopper boss avoids the position of the coil 21, and the distance between the stopper boss and the inner surface of the case is smaller than the distance between the vibrator assembly 30 and the coil 21, and when the vibrator assembly 30 is displaced in the second direction or the third direction, the vibrator assembly 30 first comes into contact with the case and is blocked by the case from coming into contact with the coil 21.
As shown in fig. 1 to 3, the housing includes a U-shaped middle shell 11, a lower shell 12 covering an opening at the bottom of the middle shell 11, and two side shells 13 covering openings at both sides of the middle shell 11, the lower shell 12 and the side shells 13 having a substantially flat plate shape, wherein the two side shells 13 are disposed along a first direction. The limit bosses include a plurality of first limit bosses 131, and the first limit bosses 131 are provided on the side case 13 to limit a displacement distance of the vibrator assembly 30 in the second direction.
The vibrator assembly 30 includes a magnetic steel 31, two balancing weights 32 and two magnetic conductive plates 33, the magnetic steel 31 is set to be rectangular, the two magnetic conductive plates 33 are respectively attached to two opposite side surfaces of the magnetic steel 31 along the first direction, the two balancing weights 32 are respectively and fixedly combined to the surfaces of the magnetic conductive plates 33, that is, the two balancing weights 32 and the magnetic conductive plates 33 are respectively located at two sides of the magnetic steel 31. The counterweight 32 and the magnetic conduction plate 33 have the same cross-sectional shape, and the thicknesses thereof are different.
The magnetic steel 31 is used for providing a uniform magnetic field, the magnetizing direction of which is set to be along the first direction, and the weight 32 is used for increasing the mass of the vibrator assembly to provide the amplitude of the linear vibration motor. The magnetic conductive plate 33 is made of a magnetic conductive material and is configured to collect magnetic induction lines to increase magnetic induction intensity of a magnetic field, thereby increasing a driving force of the linear vibration motor.
The coil 21 includes two rectangular coils, and the top and bottom surfaces of the rectangular coils are fixedly connected with the middle casing 11 and the lower casing 12, respectively, for example, they may be fixed by bonding, and are sleeved outside the two magnetic conductive plates 33, respectively. Since the magnetic poles at the positions of the two rectangular coils are different, the directions of currents passing through the two rectangular coils are opposite, and ampere forces in the same direction can be obtained, so that the utilization rate of a magnetic field is improved, the driving force of the linear vibration motor is improved, and the vibration force of the vibrator assembly 30 is improved.
It can be understood that the shape of the coil 21 corresponds to the shape of the magnetic steel 31, the weight 32 and the magnetic conductive plate 33, so as to ensure that the coil 21 can be sleeved outside the vibrator assembly 30. In some embodiments, the shape of the coil 21 may be circular or elliptical.
In the present embodiment, the inner surfaces of the middle case 11 and the lower case 12 are further provided with a damper 23, and the coil 21 is fixedly coupled to the surface of the damper 23. The damping fin 23 is made of foam or silica gel, and different vibration effects can be obtained by adjusting the thickness of the damping fin 23.
The elastic member 40 may be a spring, a spring plate, or an elastic rubber member, in this embodiment, the elastic member 40 is provided as two V-shaped spring plates, one end of each spring plate is connected to the weight block 32, and the other end of each spring plate is connected to the side shell 13. The elastic members 40 are respectively located at both sides of the vibrator assembly 30 in the vibration direction and suspend the vibrator assembly 30 in the coil 21, the elastic members 40 are used to provide elastic restoring force, and the vibrator assembly 30 vibrates under the combined action of the reaction force of the ampere force and the elastic restoring force.
The distance between the upper surface and the lower surface of the weight 32 and the corresponding first limit bosses 131 is smaller than the distance between the upper surface and the lower surface of the weight 32 and the upper inner side surface and the lower inner side surface of the coil 21, so that the first limit bosses 131 can limit the displacement distance of the vibrator assembly 30 along the second direction, and the vibrator assembly 30 cannot contact with the coil 21 in the second direction.
Further, the side casings 13 on both sides are provided with four first limiting bosses 131 to prevent the counter weights 32 on both sides of the vibrator assembly 30 from contacting the coils 21 on both sides. Specifically, when the vibrator assembly 30 moves upward in the second direction, it will contact the first limit projection 131 located thereabove, and the first limit projection 131 blocks the vibrator assembly 30 from further moving upward, thereby preventing the vibrator assembly 30 from contacting the upper inner side surface of the coil 21. Likewise, the first stopper boss 131 located below the vibrator assembly 30 can block the vibrator assembly 30 from contacting the lower inside surface of the coil 21.
In this embodiment, the first limiting boss 131 is formed by a first folded ring formed by bending the edge of the side shell 13, in actual production, the side shell 13 is made by stamping a plate, four corners of the side shell are provided with strip-shaped plates, and then the strip-shaped plates are bent to form the first folded ring, so that the side shell 13 and the first limiting boss 131 can be manufactured in one stamping and bending process, and the processing difficulty is reduced. The first corrugated rim may have one of a trapezoidal, rectangular, or semi-circular shape.
As shown in fig. 1 and 4, the limiting bosses further include a plurality of second limiting bosses 111, and the second limiting bosses 111 are used for limiting the displacement distance of the vibrator assembly 30 in the third direction, so that the vibrator assembly 30 cannot contact the coil 21 in the third direction. Specifically, the side wall of the middle case 11 is provided with a plurality of second limit bosses 111, a distance between the second limit bosses 111 and the side end surface of the weight block 32 is smaller than a distance between the left and right inner side surfaces of the coil 21 and the weight block 32, and when the vibrator assembly 30 is displaced in the third direction, the second limit bosses 111 can contact with the left side surface or the right side surface of the weight block 32, thereby limiting a displacement distance of the vibrator assembly 30 in the third direction, so that the vibrator assembly 30 cannot contact with the coil 21 in the third direction.
Further, two second limiting bosses 111 corresponding to the weights 32 are arranged on two opposite side walls of the middle shell 11, so that the vibrator assembly 30 is prevented from contacting the coils 21 on two sides. Specifically, when the vibrator assembly 30 moves to the left in the third direction, it will contact the second limit projection 111 located at the left side thereof, and the second limit projection 111 blocks the vibrator assembly 30 from further moving to the left, thereby preventing the vibrator assembly 30 from contacting the left inner side surface of the coil 21. Similarly, the second limit projection 111 located at the right side of the vibrator assembly 30 can block the vibrator assembly 30 from contacting the right inner side surface of the coil 21.
Further, the second limit projection 111 is formed by a second folded ring formed by inwardly sinking the side wall of the middle shell 11, and in actual production, the middle shell 11 is made by punching from a plate material, and the second folded ring is formed by punching at the same time.
It can be understood that the first and second limit bosses 131 and 111 limit displacement of the vibrator assembly 30 only in the second and third directions without interfering with the vibrator assembly 30 in the first direction, i.e., the vibration direction.
The first folding ring and the second folding ring are formed by bending strip-shaped plates at the corner of the shell or by inwards sinking the shell. In particular, in some embodiments, the shell may be formed by a plurality of plate-shaped shells, or two U-shaped shells, the first folding ring is formed by bending a strip-shaped plate material at the corner of the plate-shaped shell or the U-shaped shell, and the second folding ring is formed by inwards sinking the plate-shaped shell or the U-shaped shell.
It should be understood that the above-described embodiments of the present invention are examples for clearly illustrating the invention, and are not to be construed as limiting the embodiments of the present invention, and it will be obvious to those skilled in the art that various changes and modifications can be made on the basis of the above description, and it is not intended to exhaust all embodiments, and obvious changes and modifications can be made on the basis of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a linear vibration motor, its characterized in that, including be formed with the casing that holds the cavity and accept in hold stator module, oscillator subassembly and the elastic component in the cavity, stator module including with casing fixed connection's coil, oscillator subassembly passes through the elastic component suspension in the coil, the axis of coil with the vibration direction coincidence of oscillator subassembly, linear vibration motor still includes limit structure, limit structure is used for the restriction oscillator subassembly is at the perpendicular to displacement distance in the vibration direction makes the oscillator subassembly can't with the coil contact, limit structure set up in on the casing, limit structure includes a plurality ofly the protruding spacing boss that forms of inside surface of casing, spacing boss with distance between the oscillator subassembly is less than the coil with distance between the oscillator subassembly, spacing boss includes a plurality ofly is used for the restriction the oscillator subassembly is at the first spacing boss of perpendicular to horizontal plane direction displacement, first spacing boss by the first dog-fold ring that the casing edge was buckled forms, first spacing boss sets up on the relative both sides face of the vibration direction of casing, and be located respectively the oscillator subassembly is at the perpendicular to the both sides face the spacing boss of vibration in the second limit boss sets up in the perpendicular to the horizontal direction the second spacing boss.
2. The linear vibration motor of claim 1, wherein the vibrator assembly includes two magnetic steels, two magnetic conductive plates and two weight blocks, the two magnetic conductive plates and the two weight blocks are respectively disposed on two opposite sides of the magnetic steels along the vibration direction, and the first limit bosses are respectively disposed on the upper and lower sides of the weight block.
3. The linear vibration motor of claim 2, wherein two coils are provided, and are respectively sleeved outside the two magnetic conductive plates.
4. The linear vibration motor of claim 1, wherein said housing includes a U-shaped middle case, and a lower case and two side cases enclosing said accommodation chamber with said middle case, said first limit bosses being provided on said two side cases, respectively, and said second limit bosses being provided on both side walls of said middle case, respectively.
5. The linear vibration motor of claim 4, wherein the second limit projection is formed by a second corrugated rim in which a side wall of the middle case is inwardly recessed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727842.7A CN113489278B (en) | 2021-06-29 | 2021-06-29 | Linear vibration motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727842.7A CN113489278B (en) | 2021-06-29 | 2021-06-29 | Linear vibration motor |
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| CN113489278A CN113489278A (en) | 2021-10-08 |
| CN113489278B true CN113489278B (en) | 2023-02-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103401394A (en) * | 2013-08-13 | 2013-11-20 | 金龙机电股份有限公司 | Improved thin flat linear vibration motor |
| KR101478992B1 (en) * | 2014-10-17 | 2015-01-06 | 주식회사 블루콤 | Horizontality vibration motor |
| CN206060391U (en) * | 2016-10-12 | 2017-03-29 | 信利光电股份有限公司 | A kind of coil and linear motor of linear motor |
| CN106953490A (en) * | 2017-05-24 | 2017-07-14 | 信利光电股份有限公司 | A kind of linear vibration motor |
| CN207321082U (en) * | 2017-07-26 | 2018-05-04 | 歌尔科技有限公司 | Linear vibration motor |
| CN207638535U (en) * | 2017-12-21 | 2018-07-20 | 四川安和精密电子电器有限公司 | A kind of directions XY horizontal vibration motor |
| CN209358409U (en) * | 2019-01-28 | 2019-09-06 | 国光电器股份有限公司 | A kind of linear motor |
| CN111404346A (en) * | 2020-04-16 | 2020-07-10 | 浙江省东阳市东磁诚基电子有限公司 | Moving-magnet type multidirectional vibration linear motor structure and implementation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209200903U (en) * | 2018-12-17 | 2019-08-02 | 瑞声科技（南京）有限公司 | Vibrating motor |
| CN212392794U (en) * | 2019-12-20 | 2021-01-22 | 瑞声科技(新加坡)有限公司 | Linear motor |
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2021
- 2021-06-29 CN CN202110727842.7A patent/CN113489278B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401394A (en) * | 2013-08-13 | 2013-11-20 | 金龙机电股份有限公司 | Improved thin flat linear vibration motor |
| KR101478992B1 (en) * | 2014-10-17 | 2015-01-06 | 주식회사 블루콤 | Horizontality vibration motor |
| CN206060391U (en) * | 2016-10-12 | 2017-03-29 | 信利光电股份有限公司 | A kind of coil and linear motor of linear motor |
| CN106953490A (en) * | 2017-05-24 | 2017-07-14 | 信利光电股份有限公司 | A kind of linear vibration motor |
| CN207321082U (en) * | 2017-07-26 | 2018-05-04 | 歌尔科技有限公司 | Linear vibration motor |
| CN207638535U (en) * | 2017-12-21 | 2018-07-20 | 四川安和精密电子电器有限公司 | A kind of directions XY horizontal vibration motor |
| CN209358409U (en) * | 2019-01-28 | 2019-09-06 | 国光电器股份有限公司 | A kind of linear motor |
| CN111404346A (en) * | 2020-04-16 | 2020-07-10 | 浙江省东阳市东磁诚基电子有限公司 | Moving-magnet type multidirectional vibration linear motor structure and implementation method thereof |
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