CN205509817U - Linear vibrating motor - Google Patents
Linear vibrating motor Download PDFInfo
- Publication number
- CN205509817U CN205509817U CN201520743965.XU CN201520743965U CN205509817U CN 205509817 U CN205509817 U CN 205509817U CN 201520743965 U CN201520743965 U CN 201520743965U CN 205509817 U CN205509817 U CN 205509817U
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- Prior art keywords
- coil
- vibration motor
- balancing weight
- permanent magnet
- linear vibration
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004804 winding Methods 0.000 abstract description 3
- 101001045744 Sus scrofa Hepatocyte nuclear factor 1-beta Proteins 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 210000003811 finger Anatomy 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The utility model discloses a linear vibrating motor, including the oscillator and with oscillator parallel arrangement's stator, the oscillator includes that the balancing weight establishes the vibrating mass who fixes in the balancing weight with inlaying, vibrating mass includes the permanent magnet, the stator includes two at least coils, the holding has a guiding core in the coil, the axis direction mutually perpendicular of magnetize orientation and the coil of permanent magnet, the equal coiling of coil forms to there is partial overlap between the adjacent coil. The utility model discloses a linear vibrating motor utilizing on electro -magnet and permanent magnet interact carry out the driven basis, has changed traditional coil winding mode, has increased the number of turns of coil at the finite space within range, has further improved the driving force of electro -magnet, has strengthened vibration effect.
Description
Technical field
This utility model relates to electroacoustic field, is specifically related to a kind of linear vibration motor.
Background technology
Along with the development of communication technology, portable type electronic product is as many in mobile phone, handheld device or palm
Media entertainment equipment etc. gradually walks close to the life of people.In these portable type electronic products, typically can be with micro-
Type vibrating motor does system feedback, with mobile phone for example, if being in some weights such as meeting room, classroom
In the occasion wanted, on the one hand user wants to immediately receive the information feedback of information or incoming call, a side
Face is again because the seriousness of residing occasion is without opening sound prompting function, and utilizes vibrating motor
Information feedback is done in vibration just can meet above-mentioned 2 requirements easily.
Existing vibrating motor, usually linear vibration motor, after coil electricity, stator can be driven
The Lorentz force of dynamic stator movement, oscillator is then by the relation of active force Yu counteracting force, by direction phase
Anti-active force, under the influence of this active force, oscillator does linear oscillator.But, above-mentioned this structure
Linear vibration motor, the produced magnetic line of force ratio of the permanent magnet in oscillator itself is relatively decentralized, can not get fully
Utilizing, the relative magnetic flux through coil also can be smaller, and the active force of generation can be smaller, thus shadow
Ring vibration sense effect；On the other hand, in existing linear vibration motor structure, the usually coiling of its coil forms
Multi-turn structure, during for arranging multiple even many group coils simultaneously, often use coiling, line respectively
Property arrangement mode, there is no intersection between coil, do not occupy bigger space, and at limited sky
In the range of between, it is impossible to obtain more coil turn, its driving force is the most relatively limited.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of novel linear vibration motor structure,
On the one hand magnetic conduction core is set by increase in coil, thus by electric magnet and the interaction of permanent magnet,
Increasing magnetic field, improves driving force；On the other hand by changing existing two and the coiling of above coil
Mode, improves the driving force of electric magnet further.
To achieve these goals, this utility model by the following technical solutions: a kind of linear vibration motor,
Including oscillator and the stator that be arranged in parallel with described oscillator；Described oscillator includes balancing weight and is embedded in institute
Stating the vibrating mass in balancing weight, wherein, described vibrating mass includes permanent magnet；Described stator includes at least two
Coil；Magnetic conduction core it is equipped with in described coil；The magnetizing direction of described permanent magnet and the axis side of described coil
To being mutually perpendicular to；The equal coiling of described coil forms, and it is overlapping to there is part between adjacent described coil.
Improving as one, the described permanent magnet being fixed on described balancing weight is at least three pieces, is collectively forming the
One magnet portion；It is provided with conductive magnetic yoke between adjacent described permanent magnet, and, the abutting end of described permanent magnet
Polarity identical.
Improving as one, described stator includes two coils, respectively first coil and the second coil；Institute
State first coil to intersect with described second coiler part.
Improving as one, the adjacent conductive magnetic yoke between described permanent magnet is wrong with the magnetic conduction core in described coil
Position arrangement.
Improving as one, the middle position of described balancing weight is provided with shrinkage pool；Described permanent magnet and described in lead
Yoke is all contained in described shrinkage pool；Described permanent magnet is bonded as one with described conductive magnetic yoke, with described counterweight
Block gluing is fixed；The position of the corresponding described stator of described balancing weight is provided with the avoiding structure dodging described stator.
Improving as one, described coil is connected fixing with flexible circuit board；Described flexible circuit board connects institute
State the external circuit of linear vibration motor.
Improving as one, the end regions of described balancing weight is combined with vibration supporting construction；Described vibration is propped up
Support structure is the vibration axis of guide；One end of the described vibration axis of guide is inserted and is positioned at the accommodating of described balancing weight end
Kong Zhong, the other end is fixed on the external shell of described linear vibration motor；On the described vibration axis of guide sheathed
There is to provide the limit spring of elastic-restoring force.
Improving as one, the corner of described balancing weight is provided with the second magnet portion, described including being respectively embedded into
Four elongated permanent magnets in four corners of balancing weight；On the direction of vibration of described linear vibration motor oscillator
It is additionally provided with secondary magnet with described element spacing certain distance；Described secondary magnet is mutual with described elongated permanent magnet
The opposite polarity of close end.
Improving as one, the side of described linear vibration motor is additionally provided with electromagnet structure, including by-pass
Circle and the secondary magnetic conduction core being placed in described secondary coil；Described electromagnet structure is near the side of described oscillator
It is combined with magnetically permeable baffle plate.
Improving as one, described magnetic conduction core and secondary magnetic conduction core are preferably iron core.
Compared to existing technologies, linear vibration motor of the present utility model arranges magnetic conduction core in coil,
Make that the magnetic line of force is greater concentration of outwardly to be dissipated by this magnetic conduction core, and, of the present utility model linearly shake
Dynamic motor improves to some extent on oscillator with the position relationship of stator, and it has been jumped out and existing has been disposed vertically permanent magnet
With the mentality of designing of coil, by the permanent magnet horizontal positioned of oscillator and parallel with stator so that adjacent
The abutting end polarity of permanent magnet is identical, thus the strength repelled each other by the same sex concentrates the magnetic line of force of permanent magnet, makes
Obtain stator and be obtained in that the biggest magnetic flux, improve driving force；What is more important, this utility model
In, coil is set to two or more, there is part overlapping, line the most of the present utility model between adjacent coil
Property vibrating motor abandon the mode of existing multiple coils respectively coiling, but folded fork coiling, in the hope of having
Increase the number of turn of coil winding within the spatial dimension of limit, improve the driving force of electric magnet further, and then
Strengthen vibrating effect.
Accompanying drawing explanation
Fig. 1 is the explosive view of this utility model linear vibration motor structure；
Fig. 2 is the top view of this utility model linear vibration motor loop construction；
Fig. 3 is the generalized section of this utility model linear vibration motor structure；
Fig. 4-1 is this utility model linear vibration motor coil magnetic line of force distribution schematic diagram when being not powered on；
Fig. 4-2 is the operation principle schematic diagram after this utility model linear vibration motor coil electricity；
Fig. 5 is the magnetic balance principle schematic of this utility model linear vibration motor；
Reference therein includes: 1, upper casing, 2, bonnet, 3, balancing weight, 31, elongate slots, 32, accommodating
Hole, the 4, first magnet portion, the 5, first electric magnet, 51, coil, 52, magnetic conduction core, 6, elongated permanent magnet,
7, secondary magnet, the 8, second electric magnet, 81, secondary coil, 82, secondary magnetic conduction core, 9, baffle plate, 10, vibration
The axis of guide, 11, limit spring, 12, flexible circuit board (FPCB), 13, conductive magnetic yoke.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model content is described in detail:
This utility model " balancing weight " used when stating detailed description of the invention may also be referred to as
" mass ", the permanent magnet referring both to and producing vibration is fixing to strengthen the high-quality of vibration balancing, high density gold
Belong to block.Below with reference to accompanying drawing, specific embodiment of the utility model is described in detail:
Hypodynamic problem, linear vibration motor of the present utility model is driven for existing linear vibration motor
Utilize the interaction of electric magnet and permanent magnet, drive motor oscillating.Refering to shown in Fig. 1 and Fig. 3, this reality
Include that external shell, external shell specifically include the upper casing 1 combined with novel linear vibration motor
Complement each other to form with bonnet 2, upper casing 1 and bonnet 2 and there is the cavity accommodating space, receive in this cavity
Having oscillator and stator, wherein, oscillator be arranged in parallel with stator, and oscillator and stator are all at vertical direction
On arrange.Wherein, oscillator includes balancing weight 3 and is embedded the vibrating mass being fixed in balancing weight 3, shakes
Motion block specifically includes the magnetic conduction between the first magnet portion 4 and permanent magnet adjacent in the first magnet portion 4
Yoke 13, during enforcement, the medium position of balancing weight 3 is provided with shrinkage pool structure, and the first magnet portion 4 is just contained in
In above-mentioned shrinkage pool, fix with balancing weight 3 by the way of gluing, the first magnet portion shown in present embodiment
4 specifically include three block permanent magnets, during assembling, can first conductive magnetic yoke 13 be adhesively fixed with permanent magnet, then will
Assembly after first magnet portion 4 is combined with conductive magnetic yoke 13 is fixing with balancing weight 3 one.
In present embodiment, stator system include coiling coil 51, balancing weight 3 is the most corresponding
It is provided with the avoiding structure dodging coil 51；Magnetic conduction core 52, coil 51 and FPCB is accommodated in coil 51
(flexible circuit board) 12 is fixed, and FPCB12 is connected with external circuit, thus can realize foreign current
Signal imports coil 51, owing to magnetic conduction core 52 is placed in coil 51, when there being current signal to pass through, leads
Magnetic core 52 is magnetized, and as the interphase interaction of electromagnet structure Yu above-mentioned first magnet portion 4, and then promotes
Motor oscillating.
As it has been described above, linear vibration motor of the present utility model uses electric magnet former with what permanent magnet interacted
Reason drives motor oscillating, further, in order to improve the driving force of electric magnet, this practicality to a greater extent
Novel linear vibration motor, its coil 51 at least two, for present embodiment, refering to figure
Shown in 2, coil 51 is two, respectively first coil and the second coil, and the equal coiling of each coil forms,
But abandon the mode of tradition coiling respectively, but use the coiling of folded fork to complete, two the most adjacent coils
Between to there is part overlapping, so can increase coil winding within limited spatial dimension as far as possible
The number of turn, and then improve the driving force of electric magnet, strengthen the vibrating effect of linear vibration motor, be at electromagnetism
Another carried out on the basis of ferrum and permanent magnet drive jointly optimizes design.
Linear vibration motor of the present utility model, its concrete driving principle is as follows:
Shown in reference Fig. 4-1, linear vibration motor of the present utility model is adjacent in its first magnet portion 4
The polarity of the abutting end of two block permanent magnets identical (level magnetize to magnet), i.e. in S-N, N-S, S-N
Order arrangement, it is of course also possible to be N-S, S-N, N-S order arrangement, conductive magnetic yoke 13 is arranged on adjacent
Between the permanent magnet connect.As it can be seen, when the coil is not energized, the first magnet portion 4 produces magnetostatic field, because of
The strength repelled each other can be produced between the two ends that two adjacent permanent magnet polarity is identical, thus produce and concentrate very much
The magnetic line of force distribution.With reference to shown in Fig. 4-2, after coil 51 is energized, coil 51 and magnetic conduction core 52 conduct
Electromagnet structure, produces the magnetic field of change, it is possible to change the trend of magnetic field magnetic line so that the magnetic line of force is more
That concentrates is outwards dissipated by magnetic conduction core 52.Additionally, the magnetizing direction of permanent magnet and line in the first magnet portion 4
The axis direction of circle 51 is mutually perpendicular to that (defined herein axis direction refers to the cincture of coil 51 coiling time institute
Central axis, be perpendicular to the plane at coil 51 place), magnetic conduction core 52 is with conductive magnetic yoke 13 in the horizontal direction
On be spaced a distance setting, so when coil 51 is energized electric magnet can to permanent magnet produce attract or
The power repelled, the magnetic line of force can greater concentration of be transmitted to outside by magnetic conduction core 52.
According to the left hand rule (Ampere's law) of judgement electrical conductor Impact direction in magnetic field, stretch out left hand,
Make thumb and remaining four finger vertical, and all with palm in the same plane；Magnetic induction line is allowed to enter from the centre of the palm
Entering, and make four fingers point to sense of current, at this moment the direction of thumb indication is exactly electrified wire institute in magnetic field
Direction by Ampere force.The a certain moment, the sense of current in coil 51, it is assumed thatIt is expressed as vertical
Drawing inwards, is denoted asThe sense of current is that vertical view faces out, due to the line shown in present embodiment
Circle includes two, it is assumed that first coil be "With", second coil must also be "With",
Now, according to Ampere's law, it is determined that coil 51 is by directed force F to the right, owing to coil 51 is fixed on
On FPCB, relation based on active force Yu counteracting force, then the first magnet portion 4 is by reverse directed force F '
(level is to the left).So, by the first magnet portion 4 of motive force to the left just drive balancing weight 3 do together to
Left motion.In like manner, when the current direction changes, according to left hand rule, the magnetic field force F that coil 51 is subject to
Direction be to the left, and the first magnet portion 4 is by opposite direction with F and that size is identical directed force F ',
Driving balancing weight to move right together, above-mentioned motion alternately, makes the first magnet portion 4 and conductive magnetic yoke 13
The vibrating mass of composition and balancing weight 3 are formed in parallel with the linear reciprocal movement of stator.
It should be noted that the electromagnet structure that above-mentioned coil 51 and magnetic conduction core 52 are formed is for drive vibrator
Vibration, named first electric magnet, and the electromagnet structure being positioned at motor end is different from this effect, in order to
It is easy to distinguish, named second electric magnet.
Vibrating motor of the present utility model also includes vibrating supporting construction, and this vibration supporting construction guides for vibration
Axle 10, the end regions of balancing weight 3 offers the accommodating hole 32 of the accommodating vibration axis of guide, vibrates the axis of guide
One end of 10 is inserted in this accommodating hole 32；It is arranged with limit spring 11 on the vibration axis of guide 10, if oscillator
To left movement, then the just limit spring on the left of extruding balancing weight 3, and stretch the limit spring on right side, if
On the contrary, then extruding the limit spring on right side, and stretch the limit spring in left side, limit spring 11 is then oscillator
Vibration provide elastic-restoring force.
It addition, linear vibration motor of the present utility model is additionally provided with magnetic balance structure, it is described as follows:
Four folding corner regions of balancing weight 3 are respectively arranged with elongate slots 31, hold respectively in four elongate slots 31
Being equipped with elongated permanent magnet 6, four elongated permanent magnets 6 collectively constitute the second magnet portion, by elongated permanent magnet 6
It is arranged at corner, primarily to keep balance as far as possible, must assure that elongated permanent magnet 6 has bigger simultaneously
Magnetic energy product, to ensure the size of equilibrant；Secondary magnet 7 is then installed in the both sides of vibrating mass, and it is with long
Spacing between shape permanent magnet 6 should be the least, to ensure enough equilibrants, but must account for simultaneously right
Oscillation space is made and being dodged.The linear vibration motor of the present invention, the both end sides of its major axis is also respectively provided with
Two electric magnet 8 structures, including secondary coil 81 and the iron core 82 that is placed in secondary coil 81, the second electromagnetism
Ferrum 8 is combined with baffle plate 9 near one end of oscillator, and the vibration area of oscillator is separated by baffle plate 9 with secondary coil 81
Come, in order to avoid oscillator amplitude is excessive collides secondary coil 81, cause damage.It should be noted that this place
The baffle plate 9 stated is preferably magnetically permeable material.
With reference to shown in Fig. 5, utilize the absorption affinity between elongated permanent magnet 6 and secondary magnet 7, vibrating mass is produced
The grip of a raw level, when vibrating mass deflects, this grip can be transformed into contrary with yawing moment
Restoring force, thus reach the balance of vibrating mass, in this course, it is necessary to meet secondary magnet 7 with adjacent
The opposite polarity of the abutting end of elongated permanent magnet 6, as shown in FIG., is positioned at the elongated permanent magnet 6 in left side
Polarity is N-S arrangement, then, the order of polarity of secondary magnet 7 is only N-S, the S pole of so secondary magnet
And attract each other between the N pole of elongated permanent magnet 6, produce grip to the left, equally, for the magnetic on right side
Balanced structure and principle, with the explanation in above-mentioned left side as reference, repeat no more.
Preferably, magnetic conduction core 52 is iron core.
Preferably, secondary magnet 7 is provided with cushion pad near the side of oscillator, and this cushion pad is preferably elastic material
Material, can avoid with secondary magnet 7, mechanical collision occurring during oscillator vibration.
Preferably, one end of the vibration axis of guide 10 is inserted in the accommodating hole 32 of balancing weight 3, and the other end passes
Baffle plate 9 is fixed on upper casing 1, say, that balancing weight 3 is indeed through the vibration axis of guide at two ends
10 are fixed on external shell.
Preferably, the edge of FPCB12 is provided with some grooves, and the position of corresponding above-mentioned groove on bonnet 2
Installing and be equipped with the buckle structure matched, FPCB12 is fixedly secured with bonnet 2 with buckle structure by groove.
These are only this utility model case study on implementation, be not limited to this utility model, as long as ability
Territory those of ordinary skill is modified or change according to the equivalence that this utility model disclosure is made, and all should include in
In protection domain described in claims.
Claims (10)
1. a linear vibration motor, including oscillator and the stator that be arranged in parallel with described oscillator；Described oscillator
Including balancing weight and the vibrating mass being embedded in described balancing weight, it is characterised in that: described vibrating mass bag
Include permanent magnet；Described stator includes at least two coil；Magnetic conduction core it is equipped with in described coil；Described permanent magnetism
The magnetizing direction of ferrum is mutually perpendicular to the axis direction of described coil；The equal coiling of described coil forms, and phase
Part is there is overlapping between adjacent described coil.
Linear vibration motor the most according to claim 1, it is characterised in that: it is fixed on described balancing weight
Described permanent magnet be at least three pieces, be collectively forming the first magnet portion；Arrange between adjacent described permanent magnet
There is conductive magnetic yoke, and, the polarity of the abutting end of described permanent magnet is identical.
Linear vibration motor the most according to claim 1, it is characterised in that: described stator includes two
Coil, respectively first coil and the second coil；Described first coil is intersected with described second coiler part.
4. linear vibration motor as claimed in claim 1, it is characterised in that: adjacent described permanent magnet it
Between conductive magnetic yoke and described coil in the dislocation arrangement of magnetic conduction core.
Linear vibration motor the most according to claim 1, it is characterised in that: the central authorities of described balancing weight
Position is provided with shrinkage pool；Described permanent magnet and described conductive magnetic yoke are all contained in described shrinkage pool；Described permanent magnet
It is bonded as one with described conductive magnetic yoke, fixes with described balancing weight gluing；The corresponding described stator of described balancing weight
Position be provided with the avoiding structure dodging described stator.
Linear vibration motor the most according to claim 1, it is characterised in that: described coil and flexible wires
Road plate connects fixing；Described flexible circuit board connects the external circuit of described linear vibration motor.
Linear vibration motor the most according to claim 1, it is characterised in that: the end of described balancing weight
Region is combined with vibration supporting construction；Described vibration supporting construction is the vibration axis of guide；The described vibration axis of guide
One end insert and be positioned in the accommodating hole of described balancing weight end, the other end is fixed on described linear vibration motor
External shell on；It is arranged with to provide the limit spring of elastic-restoring force on the described vibration axis of guide.
Linear vibration motor the most according to claim 1, it is characterised in that: the corner of described balancing weight
It is provided with the second magnet portion, including four elongated permanent magnets in four corners being respectively embedded into described balancing weight；
The direction of vibration of described linear vibration motor oscillator is additionally provided with secondary magnetic with described element spacing certain distance
Body；The opposite polarity of the end that described secondary magnet is close to each other with described elongated permanent magnet.
Linear vibration motor the most according to claim 1, it is characterised in that: described linear vibration motor
Side be additionally provided with electromagnet structure, including secondary coil and the secondary magnetic conduction core that is placed in described secondary coil；
Described electromagnet structure is combined with magnetically permeable baffle plate near the side of described oscillator.
Linear vibration motor the most according to claim 1, it is characterised in that: described magnetic conduction core and pair are led
Magnetic core is preferably iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520743965.XU CN205509817U (en) | 2015-09-23 | 2015-09-23 | Linear vibrating motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520743965.XU CN205509817U (en) | 2015-09-23 | 2015-09-23 | Linear vibrating motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509817U true CN205509817U (en) | 2016-08-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520743965.XU Expired - Fee Related CN205509817U (en) | 2015-09-23 | 2015-09-23 | Linear vibrating motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655690A (en) * | 2016-11-11 | 2017-05-10 | 歌尔股份有限公司 | Linear vibration motor |
| CN110379583A (en) * | 2019-08-12 | 2019-10-25 | 江苏睿昕联合汽车科技集团有限公司 | A kind of structure and its method of permanent magnet and copper coil cooperation increase magnetism |
| CN113957915A (en) * | 2021-11-22 | 2022-01-21 | 上海绿地建设(集团)有限公司 | Rainwater recoverable foundation pit drainage device for building construction |
-
2015
- 2015-09-23 CN CN201520743965.XU patent/CN205509817U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655690A (en) * | 2016-11-11 | 2017-05-10 | 歌尔股份有限公司 | Linear vibration motor |
| CN106655690B (en) * | 2016-11-11 | 2019-04-23 | 歌尔股份有限公司 | Linear vibration motor |
| CN110379583A (en) * | 2019-08-12 | 2019-10-25 | 江苏睿昕联合汽车科技集团有限公司 | A kind of structure and its method of permanent magnet and copper coil cooperation increase magnetism |
| CN113957915A (en) * | 2021-11-22 | 2022-01-21 | 上海绿地建设(集团)有限公司 | Rainwater recoverable foundation pit drainage device for building construction |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20190923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |