CN114157115B - High-drive ultrathin linear vibration device - Google Patents
High-drive ultrathin linear vibration device Download PDFInfo
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- CN114157115B CN114157115B CN202111346730.3A CN202111346730A CN114157115B CN 114157115 B CN114157115 B CN 114157115B CN 202111346730 A CN202111346730 A CN 202111346730A CN 114157115 B CN114157115 B CN 114157115B
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- 238000005452 bending Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 18
- 239000006260 foam Substances 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 230000006698 induction Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention relates to a high-drive ultrathin linear vibration device, which comprises a lower shell, a circuit board, a coil, a mass block and an elastic piece, wherein the lower shell comprises a plane, a positioning boss in the middle of the plane and bending arms at the edges of two sides of the plane; the circuit board penetrates through the positioning boss and is arranged on the plane, the coil and the positioning boss are arranged in a limiting mode and are arranged on the circuit board, and limiting bosses are arranged on two sides of the circuit board; the mass block is positioned at the upper part of the coil, the mass block comprises a magnet combination part, a magnet group is fixed in the magnet combination part, a magnetic conduction sheet is arranged above the magnet group, a balance sheet is arranged below the magnet group, one end of the elastic sheet is provided with a positioning bending part, and the positioning bending part is connected with a bending arm of the lower shell to form a smash-proof cushion block; the other end of the elastic piece is provided with a positioning block, two sides of the mass block are provided with platform grooves, and the elastic piece is in seamless welding through the close fit between the positioning block and the platform grooves. The invention has novel structure, accurate assembly and large driving force, and simultaneously the vibration is stable.
Description
Technical Field
The invention belongs to the technical field of electromagnetics and vibration mechanics, relates to feedback function devices of complete machine devices such as headphones, mobile phones and game handles thereof, and particularly relates to a high-drive ultrathin linear vibration device.
Background
At present, linear motors in the market are mainly divided into a Z-axis linear motor (the vibration direction is the thickness direction) and an X-axis linear motor (the vibration direction is the non-thickness direction), along with the increasing requirements of users on appearance and vibration feeling, the ultrathin design of the linear motor has become a trend, the Z-axis linear motor is not suitable for being used as an ultrathin design structure of a product due to the limitation of the vibration direction and space, and the X-axis motor has good vibration body feeling, relatively high utilization rate of the whole space and can be used as a primary choice of the ultrathin design. However, because the ultrathin structure is limited by the height, the driving force is usually smaller, so that the vibration feeling requirement of a terminal client cannot be met; secondly, in the existing V-shaped spring plate structure, in order to prevent the spring plate from colliding with the shell and damaging the spring plate in the process of directional falling of the product, foam or a cushion block is often added between the spring plate and the inner side surface of the shell, and the use of the structure causes great process difficulty, low process yield and is not beneficial to mass production of the product; in addition, during the assembly process of the voice coil and the shell, the coil and the positioning tool are easy to deflect, so that the centering effect is poor, the coil is positioned inaccurately, the magnetic circuit system is asymmetric, the product is easy to polarize in the vibration process, and the noise is poor; in addition, in the welding process of the elastic sheet and the mass block, the welding energy is unstable, so that the height of the welding point of part of the product is high, and the soldering tin ball is rubbed with the shell, so that the noise is poor.
Patent documents not found to be relevant to the present application are searched.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the novel structure which is convenient to install, reduces the technological difficulty of products, simplifies the technological manufacturing flow and improves the yield of the products; and the high-driving ultrathin linear vibration device with stable vibration.
The invention solves the technical problems by adopting the following technical scheme:
The high-drive ultrathin linear vibration device comprises a lower shell, a circuit board, a coil, an upper shell, a mass block and an elastic piece, wherein the lower shell comprises a plane, and a positioning boss is arranged in the middle of the plane; the circuit board is communicated with the positioning boss and combined with the plane, the coil is arranged on the upper part of the circuit board, the center of the coil is communicated with the positioning boss, limit bosses are also obliquely and symmetrically arranged on the planes on the same sides of the two sides of the circuit board in the horizontal vibration direction, and bending arms are upwards bent at the edges of the two sides of the plane; the mass block is positioned at the upper part of the coil, the mass block comprises a magnet combination part, a magnet group is fixed in the magnet combination part, the magnet group is formed by arranging a plurality of magnets through a halbach array, a magnetic conduction sheet is arranged above the magnet group, a balance sheet is arranged below the magnet group, the magnetic conduction sheet is arranged in a positioning groove of the mass block, and the balance sheet is arranged in the magnet combination part; the elastic piece comprises an arc-shaped connecting piece, two elastic arms are integrally and prolonged on the vertical side walls at the two ends of the arc-shaped connecting piece, the two elastic arms are a first elastic arm and a second elastic arm respectively, a positioning bending is integrally formed at the tail end of the first elastic arm, and the positioning bending is fixedly clamped and connected with the bending arm of the lower shell to form a smash-proof cushion block; the end part of the second elastic arm is fixedly provided with a positioning block, two sides of the mass block are respectively provided with a platform groove matched with the positioning block, and the other end of the elastic piece is in seamless welding through the close fit between the positioning block and the platform groove; the upper shell is hollow and forms the outer contour of the vibration device, the upper shell and the lower shell are matched with each other to form a closed cavity, and the mass block is suspended in the closed cavity;
the distance between the first elastic arm and the second elastic arm is larger and larger from one end close to the arc-shaped connecting piece to one end far away from the arc-shaped connecting piece.
The widths of the central parts of the first elastic arm and the second elastic arm are smaller than the widths of the two sides of the first elastic arm and the second elastic arm;
The balance piece is made of tungsten-nickel alloy; the upper shell and the lower shell are made of magnetic conduction materials.
And the upper shell is also provided with a positioning through hole.
And the mass blocks on two sides of the magnetic conduction sheet are symmetrically provided with double grooves.
And glue overflow semicircular holes are formed in four corners in the magnet combining part.
And foam is further arranged between the mass block and the second elastic arm of the elastic sheet, and a retraced curved surface for positioning the foam is further arranged on the mass block.
Moreover, the connection surface of the elastic piece and the mass block and the connection surface of the elastic piece and the bending arm of the lower shell are also provided with supporting objects, and the supporting objects are combined with the elastic piece.
The invention has the advantages and positive effects that:
The plane of the lower shell is provided with the positioning boss, the limiting boss and the bending arm, wherein the positioning boss can realize the centering effect of the coil, so that the coil is positioned more accurately, and the production yield of products is improved; the positioning boss is used as a magnetic conduction material when positioning the coil, plays a role of an iron core after the coil is electrified, improves the utilization rate of the magnetic induction wire and increases the driving force; the limiting convex table plays a role in limiting and protecting the elastic sheet in the directional falling process while positioning the circuit board; the bending arm can be directly connected in a matched manner through positioning and bending at one end of the elastic sheet to form a preset position, so that the positioning precision is improved, and the production process is simplified;
The magnet group fixed at the magnet combining part in the mass block is formed by arranging a plurality of magnets through the halbach array, so that the magnetic loop is shortened, the utilization rate of magnetic induction lines is improved, the magnetic induction intensity of a magnetic circuit of a product is increased, the driving force is improved, the response time of the product is shortened, and the vibration induction of the product is improved; the magnetic conductive sheet is arranged above the magnet group, and the balancing sheet is arranged below the magnet group, so that the magnetic induction lines are gathered, more magnetic induction lines penetrate through the conductive coil, and meanwhile, magnetic leakage of products is prevented, and the magnetization influence of the products on other parts in the whole machine due to the magnetic leakage is avoided;
One end of the elastic sheet is provided with a positioning bend, and the positioning bend is connected with a bending arm of the lower shell to form a smash-proof cushion block; the other end of the elastic piece is provided with a positioning block, two sides of the mass block are provided with platform grooves, the elastic piece is in seamless welding through the close fit between the positioning block and the platform grooves, the height of a welding point is prevented from being higher than the upper surface of the mass block, and the welding yield and the performance yield are improved.
Drawings
FIG. 1 is an exploded view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic diagram of the magnetic circuit of the present invention;
FIG. 4 is a diagram showing the assembly structure of the spring and the lower housing of the present invention;
FIG. 5 is a block diagram of a spring plate according to the present invention;
FIG. 6 is a perspective view of a spring plate according to the present invention;
FIG. 7 is a view showing the construction of the lower case of the present invention;
FIG. 8 is a block diagram of a stator of the present invention;
FIG. 9 is a schematic block diagram of the present invention;
Fig. 10 is a schematic diagram illustrating welding assembly of the spring plate and the mass block according to the present invention.
Detailed Description
The invention will now be described in further detail by way of specific examples, which are given by way of illustration only and not by way of limitation, with reference to the accompanying drawings.
The high-drive ultrathin linear vibration device comprises a lower shell 11, a circuit board 10, a coil 9, an upper shell 1, a mass block 2 and an elastic sheet 6, wherein the lower shell comprises a plane, and two positioning bosses 11-1 are arranged in the middle of the plane at intervals; the circuit board is communicated with the positioning boss and combined with the plane, the coil is arranged at the upper part of the circuit board, the center of the coil is communicated with the positioning boss and vertically combined with the plane, limit bosses 11-2 are also obliquely and symmetrically manufactured on the plane on the same side of the two sides of the circuit board in the horizontal vibration direction, the limit bosses play a role in positioning the circuit board, and bending arms 11-3 are upwards bent at the edges of the two sides of the plane; the lower shell, the circuit board and the coil form a stator; the positioning boss can realize centering action of the coil, so that the coil is positioned more accurately, and the production yield of products is improved; the positioning boss is used as a magnetic conduction material when positioning the coil, so that the coil plays a role of an iron core after being electrified, the utilization rate of the magnetic induction wire is improved, and the driving force is increased;
the mass block is positioned at the upper part of the coil, the mass block comprises a magnet combination part 2-2, the magnet combination part is a rectangular through hole, a magnet group 4 is fixed in the magnet combination part and is arranged by a plurality of magnets through a Halbach Array, five magnets are adopted in the embodiment, the Halbach Array (Halbach Array) is a permanent magnet arrangement mode, and the permanent magnets with different magnetization directions are arranged according to a certain sequence, so that the magnetic field at one side of the Array is obviously enhanced; therefore, the magnetic loop is shortened, the utilization rate of magnetic induction lines is improved, the magnetic induction intensity of a magnetic circuit of a product is increased, the driving force is improved, the response time of the product is shortened, and the vibration sense of the product is improved; the upper part of the magnet group is provided with a magnetic conduction sheet 3, the lower part of the magnet group is provided with a balance sheet 8, the magnetic conduction sheet is arranged in a positioning groove 2-1 of the mass block, and the balance sheet is arranged in the magnet combining part; the magnetic conductive sheet enables the magnetic induction lines to be gathered, so that the magnetic induction lines penetrate through the conductive coil more, meanwhile, magnetic leakage of products is prevented, and the magnetization influence of the products on other parts in the whole machine due to the magnetic leakage is avoided; elastic pieces are obliquely and symmetrically connected to two sides of the mass block to form vibrators, the other ends of the elastic pieces are fixedly connected with bending arms of the lower shell to form preset positions, positioning accuracy is improved, and production process is simplified; the upper shell is hollow and forms the outer contour of the vibration device, the upper shell and the lower shell are matched with each other to form a closed cavity, and the mass block is suspended in the closed cavity; the circuit board receives power from the outside, supplies the power to the coil, generates an electric field after the coil receives the power supplied by the circuit board, enables the generated electric field to act with the magnetic field of the magnet, and generates stable horizontal vibration through the cooperation of the elastic sheet;
The elastic sheet adopts an N-shaped structure and comprises an arc-shaped connecting piece 6-5, two elastic arms are integrally and prolonged on the vertical side walls at the two ends of the arc-shaped connecting piece, namely a first elastic arm 6-2 and a second elastic arm 6-4, a positioning bending 6-1 is integrally arranged at the tail end of the first elastic arm, and the positioning bending is fixedly clamped and connected with a bending arm of the lower shell to form a smashing-preventing cushion block, so that the traditional cushion block and foam structure are replaced, the production process is simplified, the production cost is reduced, and the production yield is improved; the opening of the positioning bending part and the opening of the arc-shaped connecting piece are arranged in opposite directions; the end part of the second elastic arm is fixedly provided with a positioning block 6-3, and two sides of the mass block are respectively provided with a platform groove 2-6 matched with the positioning block, so that the elastic sheet and the mass block can be positioned and tightly attached to each other, seamless welding is realized, the height of a welding point is prevented from being higher than the upper surface of the mass block, the welding yield and the performance yield are improved, and meanwhile, the welding process flow is improved, so that the welding of products is firmer;
the distance between the two elastic arms is larger and larger from one end close to the arc-shaped connecting piece to one end far away from the arc-shaped connecting piece, and the width of the central parts of the two elastic arms is narrower, so that the vibration frequency is reduced, and the vibration feeling is improved;
In the implementation of the invention, the balance piece is made of tungsten-nickel alloy high-density material, so that the vibrator quality is improved, and the vibration feeling of the product is improved; the upper shell and the lower shell are made of magnetic conductive materials, the magnetic attraction force of the magnet to the upper shell and the lower shell is different, and the magnetic attraction force of the magnet to the upper shell and the lower shell is adjusted through the balancing piece, so that the magnetic balance of the magnetic circuit system is ensured, and the vibration is more stable; meanwhile, the upper shell is provided with a positioning through hole, so that the positioning effect on the vibrator structure can be realized, the distance between the shell and the vibrator structure is ensured, and the problem of poor product performance caused by inaccurate gap precision between the vibrator and the shell due to the influence of magnetic attraction of the shell and the magnet is solved;
In the implementation of the invention, the mass blocks on two sides of the magnetic conduction sheet are symmetrically provided with the double grooves 2-3, and the design of the double grooves solves the problem of welding gaps caused by tilting of two sides after the magnetic conduction sheet is welded, improves the welding yield and improves the arrangement and welding stability of the magnetic conduction sheet;
further, in order to ensure that the magnetic conduction sheet and the mass block are welded or glued without gaps after being assembled, the problem of glue overflow after being glued is avoided, meanwhile, the drawing force between the magnetic conduction sheet and the mass block is increased, glue overflow semicircular holes 2-4 are formed in four corners in the magnet combining part, glue after being glued can be stored in the glue overflow semicircular holes, the problem of glue overflow in the process of glue overflow of the magnetic steel is avoided, and meanwhile, the adhesive force between the magnetic steel and the mass block and after being assembled is increased;
In the concrete implementation of the invention, foam 7 is arranged between the mass block and the second spring arm of the spring plate, and for better fixing the foam, a retraced curved surface 2-5 for positioning the foam is also arranged on the mass block, so that the function of positioning the foam is realized, the foam is parallel to the second spring arm of the spring plate after being installed, the influence of the foam on the service life of the spring plate and the inherent coefficient of the spring plate in the product vibration process is reduced, the product performance yield is improved, the process assembly process is simplified, and the operation efficiency is improved;
Further, in order to prevent deformation and breakage of the elastic sheet, a support 5 is further provided at the connection surface of the elastic sheet and the mass block and the connection surface of the elastic sheet and the bending arm of the lower housing, and the support is combined with the elastic sheet for supporting the connection of the elastic sheet and the mass block and the connection of the elastic sheet and the bending arm of the lower housing, so that the elastic sheet and the bending arm of the lower housing are fixed.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (6)
1. The utility model provides a high ultra-thin linear vibrating device of drive, includes casing, circuit board, coil, last casing, quality piece and shell fragment down, the casing includes plane, its characterized in that down: a positioning boss is arranged in the middle of the plane; the circuit board is communicated with the positioning boss and combined with the plane, the coil is arranged on the upper part of the circuit board, the center of the coil is communicated with the positioning boss, limit bosses are also obliquely and symmetrically arranged on the planes on the same sides of the two sides of the circuit board in the horizontal vibration direction, and bending arms are upwards bent at the edges of the two sides of the plane; the mass block is positioned at the upper part of the coil, the mass block comprises a magnet combination part, a magnet group is fixed in the magnet combination part, the magnet group is formed by arranging a plurality of magnets through a halbach array, a magnetic conduction sheet is arranged above the magnet group, a balance sheet is arranged below the magnet group, the magnetic conduction sheet is arranged in a positioning groove of the mass block, and the balance sheet is arranged in the magnet combination part; the elastic piece comprises an arc-shaped connecting piece, two elastic arms are integrally and prolonged on the vertical side walls at the two ends of the arc-shaped connecting piece, the two elastic arms are a first elastic arm and a second elastic arm respectively, a positioning bending is integrally formed at the tail end of the first elastic arm, and the positioning bending is fixedly clamped and connected with the bending arm of the lower shell to form a smash-proof cushion block; the end part of the second elastic arm is fixedly provided with a positioning block, two sides of the mass block are respectively provided with a platform groove matched with the positioning block, and the other end of the elastic piece is in seamless welding through the close fit between the positioning block and the platform groove; the upper shell is hollow and forms the outer contour of the vibration device, the upper shell and the lower shell are matched with each other to form a closed cavity, and the mass block is suspended in the closed cavity;
The distance between the first elastic arm and the second elastic arm is larger and larger from one end close to the arc-shaped connecting piece to one end far away from the arc-shaped connecting piece;
The widths of the central parts of the first elastic arm and the second elastic arm are smaller than the widths of the two sides of the first elastic arm and the second elastic arm;
The balance piece is made of tungsten-nickel alloy; the upper shell and the lower shell are made of magnetic conduction materials.
2. The high-drive ultrathin linear vibration device according to claim 1, wherein: the upper shell is also provided with a positioning through hole.
3. The high-drive ultrathin linear vibration device according to claim 1, wherein: and double grooves are symmetrically formed on the mass blocks at two sides of the magnetic conduction sheet.
4. The high-drive ultrathin linear vibration device according to claim 1, wherein: glue overflow semicircular holes are formed in four corners in the magnet combining part.
5. The high-drive ultrathin linear vibration device according to claim 1, wherein: foam is further arranged between the mass block and the second elastic arm of the elastic sheet, and a retraced curved surface for positioning the foam is further arranged on the mass block.
6. The high-drive ultrathin linear vibration device according to claim 1, wherein: and the connection surface of the elastic sheet and the mass block and the connection surface of the elastic sheet and the bending arm of the lower shell are also provided with supporting objects, and the supporting objects are combined with the elastic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346730.3A CN114157115B (en) | 2021-11-15 | 2021-11-15 | High-drive ultrathin linear vibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346730.3A CN114157115B (en) | 2021-11-15 | 2021-11-15 | High-drive ultrathin linear vibration device |
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| Publication Number | Publication Date |
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| CN114157115A CN114157115A (en) | 2022-03-08 |
| CN114157115B true CN114157115B (en) | 2024-06-14 |
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| CN202111346730.3A Active CN114157115B (en) | 2021-11-15 | 2021-11-15 | High-drive ultrathin linear vibration device |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216564882U (en) * | 2021-11-15 | 2022-05-17 | 天津富禄通信技术有限公司 | High-drive ultrathin linear vibration device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201937367U (en) * | 2010-12-27 | 2011-08-17 | 瑞声光电科技(常州)有限公司 | Linear vibration motor |
| CN106712437B (en) * | 2016-11-30 | 2019-01-04 | 歌尔股份有限公司 | A kind of linear vibration motor |
| CN111404347A (en) * | 2020-04-20 | 2020-07-10 | 瑞声科技（南京）有限公司 | Oblique vibration linear motor and electronic equipment using same |
| CN112600380A (en) * | 2020-12-21 | 2021-04-02 | 天津富禄通信技术有限公司 | Stable vibration device |
| CN112737263A (en) * | 2020-12-21 | 2021-04-30 | 天津富禄通信技术有限公司 | Miniature vibrating device |
| CN113507192A (en) * | 2021-06-28 | 2021-10-15 | 天津富禄通信技术有限公司 | Ultra-thin type vibrating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN216564882U (en) * | 2021-11-15 | 2022-05-17 | 天津富禄通信技术有限公司 | High-drive ultrathin linear vibration device |
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