CN205847548U - T ferrum, magnetic circuit assembly and supersound projector - Google Patents
T ferrum, magnetic circuit assembly and supersound projector Download PDFInfo
- Publication number
- CN205847548U CN205847548U CN201620768317.4U CN201620768317U CN205847548U CN 205847548 U CN205847548 U CN 205847548U CN 201620768317 U CN201620768317 U CN 201620768317U CN 205847548 U CN205847548 U CN 205847548U
- Authority
- CN
- China
- Prior art keywords
- groove
- magnetic core
- voice coil
- ferrum
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The open a kind of T ferrum of this utility model, magnetic circuit assembly and supersound projector.Wherein, T ferrum includes the magnetic core of cylinder, and the base that the lower end being located on described magnetic core is coaxially disposed with described magnetic core, described base is provided with some first grooves making extraneous air act on described magnetic core, the axis of described magnetic core is perpendicular to the plane at described first groove place.This utility model can make the air of base exterior be directly over this first groove to act on around the outside voice coil loudspeaker voice coil arranged of T ferromagnetic core by arranging the first groove on base, through the winding portion of this voice coil loudspeaker voice coil during cross-ventilation, the heat produced with the winding portion of this voice coil loudspeaker voice coil carries out heat exchange, temperature effective, reduction voice coil loudspeaker voice coil in time.Additionally, offering of the first groove on T ferrum of the present utility model is very convenient, its processing is simple, and production cost is low.
Description
Technical field
This utility model relates to loudspeaker techniques field, be specifically related to a kind of T ferrum, the magnetic circuit assembly comprising this T ferrum and
Comprise the supersound projector of this magnetic circuit assembly.
Background technology
The radiating treatment of existing supersound projector, is mainly accomplished by: perforate processes, such as at T ferrum
Magnetic core perforate, T ferrum bottom opening or frame prop up the sound basin in sheet perforate, dust cap or skeleton perforate;Wherein, the most commonly used it is
Use T ferromagnetic core perforate or the mode of T ferrum bottom opening.As shown in Figure 1, 2, T ferrum includes base 1 ' and is arranged at this base 1 '
On magnetic core 2 ', one of which radiator structure is axially to offer the first through hole 3 ' (Fig. 1) centrally along it at magnetic core 2 ', another
Planting radiator structure is vertically to arrange the second through hole 4 ' on base 1 ', and this second through hole 4 ' is arranged around described magnetic core 2 '
(Fig. 2).
The radiating mode of above two T ferrum can make the heat quick drain that voice coil loudspeaker voice coil 2 produces, the beneficially tonequality of speaker
Performance, but yet suffer from following defect:
(1), the problem that heat radiation can not be efficiently solved: as supersound projector, the copper cash on its voice coil loudspeaker voice coil is that heat produces
Raw main body, the heat band that in above two radiating mode, the discharge of produced air all can not will produce outside voice coil loudspeaker voice coil in time
Walk, thus voice coil loudspeaker voice coil copper cash and the external world cannot be made to reach effective heat exchange.
(2), the relative aperture of T ferrum relatively big, very difficult time processing puts in place, needs to increase multiple operation, relatively costly.
Utility model content
A purpose of the present utility model is to provide a kind of T ferrum, and to the voice coil loudspeaker voice coil arranged outside the magnetic core of T ferrum, it has good
Good radiating effect, and the simple in construction of T ferrum, production cost is low.
Another purpose of the present utility model is to provide a kind of magnetic circuit assembly, and this magnetic circuit assembly is used for supersound projector
Time the air around extraneous air and magnetic core can be made to carry out effective heat exchange, to take away the coiling of the voice coil loudspeaker voice coil around magnetic core in time
The produced heat of part.
Another purpose of the present utility model is to provide a kind of supersound projector, and it has good radiating effect.
For reaching this purpose, this utility model by the following technical solutions:
On the one hand, it is provided that a kind of T ferrum, including cylindrical magnetic core, and it is located on the lower end of described magnetic core and described magnetic
The base that core is coaxially disposed, described base is provided with some first grooves making extraneous air act on described magnetic core, described
The axis of magnetic core is perpendicular to the plane at described first groove place.
As a kind of preferably technical scheme, the described first groove center along its length of T ferrum in utility model
Line is straight line.
The centrage along its length of the first groove in this utility model can also be other line styles, such as curve.
As a kind of preferably technical scheme of T ferrum in utility model, some described first grooves are along the footpath of described base
To uniform.
As a kind of preferably technical scheme of T ferrum in utility model, described first groove is positioned at the upper table of described base
Face;Or, described first groove is positioned at the sidewall of described base.
As a kind of preferably technical scheme of T ferrum in utility model, described base is arranged near the side of described magnetic core
Having the second groove, described second groove is arranged around the periphery of described magnetic core, and described first groove and described second groove phase
Connection.
On the other hand, it is provided that a kind of magnetic circuit assembly, including above-mentioned T ferrum, also include being coaxially disposed with the magnetic core of described T ferrum
Magnet steel and front plate, described magnet steel and described front plate be set in turn in from the bottom to top on described base, described magnet steel, described
It is respectively provided with gap between the described magnetic core of front plate and described T ferrum.
As a kind of preferably technical scheme of magnetic circuit assembly in this utility model, also include being arranged at outside described magnetic core
Short-circuited conducting sleeve, in described short-circuited conducting sleeve gap between described magnet steel and described magnetic core.
As a kind of preferably technical scheme of magnetic circuit assembly in this utility model, described short-circuited conducting sleeve is radially offered
There are some through holes.
As a kind of preferably technical scheme of magnetic circuit assembly in this utility model, described first groove is near described magnetic core
One rectify to described through hole.
Another aspect, it is provided that a kind of supersound projector, including above-mentioned magnetic circuit assembly.
The beneficial effects of the utility model: the first groove arranged on base is crossed by T Tie Tong of the present utility model can make the end
Air outside Zuo is directly over this first groove and acts on around the outside voice coil loudspeaker voice coil arranged of T ferromagnetic core, passes during cross-ventilation
The winding portion of this voice coil loudspeaker voice coil, the heat produced with this voice coil loudspeaker voice coil carries out heat exchange, temperature effective, reduction voice coil loudspeaker voice coil in time.Additionally, this
Offering of the first groove on the T ferrum of utility model is very convenient, and its processing is simple, and production cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of T ferrum.
Fig. 2 is the structural representation of existing another kind of T ferrum.
Fig. 3 is the perspective view of the T ferrum described in this utility model embodiment.
Fig. 4 is the A direction view of Fig. 3.
Fig. 5 is the top view of Fig. 3.
Fig. 6 is the structural representation of the magnetic circuit assembly described in this utility model embodiment.
Fig. 7 is that the B-B of Fig. 6 is to sectional view.
Fig. 8 is the decomposing schematic representation of the supersound projector described in this utility model embodiment.
Fig. 9 is that the supersound projector described in this utility model embodiment is along its axial three-dimensional cutaway view.
Fig. 1, in 2:
1 ', base;2 ', magnetic core;3 ', first through hole;4 ', second through hole.
In Fig. 3~9:
10, magnetic core;20, base;21, the first groove;22, the second groove;
100, T ferrum;200, magnet steel;300, front plate;400, short-circuited conducting sleeve;401, through hole;500, voice coil loudspeaker voice coil;600, frame;
700, determine core and prop up sheet;800, sound basin group;900, dust cap.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by detailed description of the invention.
In description of the present utility model, it is to be understood that the orientation of the instruction such as term " interior ", " outward " or position relationship
For based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description rather than refer to
Show or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not manage
Solve as to restriction of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.
In description of the present utility model, unless otherwise clearly defined and limited, term " is fixed " and should be interpreted broadly,
Connect for example, it may be fixing, it is also possible to be to removably connect, or integral;Can be to be mechanically connected, it is also possible to be to be electrically connected
Connect;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the connection of two components interior or two portions
The interaction relationship of part.For the ordinary skill in the art, can understand that above-mentioned term is in this reality with concrete condition
With the concrete meaning in novel.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
D score can include that the first and second features directly contact, it is also possible to includes that the first and second features are not directly contact but logical
Cross the other characterisation contact between them.And, fisrt feature second feature it " on " include that fisrt feature is special second
Directly over levying and oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature it
D score include fisrt feature immediately below second feature and obliquely downward, or it is special less than second to be merely representative of fisrt feature level height
Levy.
The perspective view of the T ferrum that Fig. 3 provides for this utility model embodiment, Fig. 4 is the A direction view of Fig. 3, Fig. 5
Top view for Fig. 3.
As seen in figures 3-5, the T ferrum of the present embodiment include cylinder magnetic core 10, and be located on magnetic core 10 lower end,
The base 20 being coaxially disposed with magnetic core 10, base 20 is provided with some first grooves making extraneous air act on magnetic core 10
21, the axis of magnetic core 10 is perpendicular to the plane at the first groove 21 place.The opening of first groove 21 one end in the present embodiment sets
Putting on the sidewall of base 20, the opening of the other end directly abuts the outer wall of magnetic core 10.When being particularly applicable in speaker, T ferrum
Magnetic core 10 outside be provided with the voice coil loudspeaker voice coil that caloric value is bigger, have gap between voice coil loudspeaker voice coil and magnetic core 10, during speaker operation, the end of by
The first groove 21 arranged on seat 20 can make the air of the base exterior sky directly around this first groove 21 and magnetic core 10
Gas generation heat exchange, through the winding portion of this voice coil loudspeaker voice coil during cross-ventilation, the heat produced with this voice coil loudspeaker voice coil carries out heat exchange, has
The temperature of effect, in time reduction voice coil loudspeaker voice coil.
Additionally, offering of the first groove 21 on T ferrum of the present utility model is very convenient, its processing is simple, production cost
Low.
In the present embodiment, the magnetic core 10 of T ferrum and base 20 are not limited to the structure of cylinder, occur in any prior art
The structure of T ferrum be all applicable on base 20, offer the first groove 21 as above.
In the present embodiment, magnetic core 10 and base 20 are formed in one structure, and base 20 axially has certain thickness along it
Degree, its thickness is adapted to the setting of the first groove 21.
As this utility model preferred embodiment, the first groove 21 centrage along its length be one straight
Line, the i.e. first groove 21 is strip, and the distance of the heat interchange channel at extraneous air and magnetic core 10 is relatively short, heat exchange
Fastest, thus improve the rate of heat dispation of voice coil loudspeaker voice coil.
In the present embodiment, the first groove 21 is unrestricted along the shape of its width, its shape including but not limited to
Circular, square, racetrack, trapezoidal, triangle etc.;First groove 21 can also be disposed through the structure of the bottom of base 20,
Same have good radiating effect to voice coil loudspeaker voice coil.
The first groove 21 in the present embodiment is uniformly arranged on base 20;Preferably, some first grooves 21 are along base
The radial equipartition of 20.On the one hand, the length making hot switching path is the shortest, to improve the rate of heat dispation of voice coil loudspeaker voice coil further;The opposing party
Face, the heat ratio that voice coil loudspeaker voice coil distributes is more uniform, and the first uniform groove 21 passes through with can making the even heat distributed on voice coil loudspeaker voice coil
Outside air carries out heat exchange, it is to avoid on voice coil loudspeaker voice coil, certain a part of overheated situation occurs, to improve radiating effect.
Specifically, the first groove 21 is positioned at the upper surface of base 20;Or, the first groove 21 is positioned at the sidewall of base 20
In.I.e. first groove 21 of the present embodiment can be the groove structure of the equal opening in top and two ends, it is also possible to for only two ends
The through-hole structure of opening, with tradition T ferrum base on vertically offer through hole compared with, T Tie Tong of the present utility model cross by
First groove 21 is horizontally set on base 20, the air of base 20 side compared with the air of base 20 lower end, its circulation
More preferably, making the air circulation in the heat dissipation channel of the first groove 21 composition more smoothly, radiating effect is more preferable.
As the optional embodiment of the present embodiment, base 20 is provided with the second groove 22 near the side of magnetic core 10, the
The periphery of two groove 22 wounded cores 10 is arranged, and the first groove 21 is connected with the second groove 22.In the present embodiment, second is recessed
Groove 22 the vibrating effect that can improve voice coil loudspeaker voice coil is set, and the first groove 21 is connected with the second groove 22, is also beneficial to voice coil loudspeaker voice coil
Radiating and cooling.
In the present embodiment, the shape of the cross section of the second groove 22 is unrestricted, its shape including but not limited to circular,
Square, racetrack, trapezoidal, triangle etc..
Embodiment of the present utility model also provides for a kind of magnetic circuit assembly, and as shown in Figure 6,7, it includes described in above-described embodiment
T ferrum 100, also include magnet steel 200 and front plate 300, magnet steel 200 and front plate that the magnetic core 10 with T ferrum 100 is coaxially disposed
300 are set in turn on base 20 from the bottom to top, magnet steel 200, front plate 300 and T ferrum 100 magnetic core 10 between be respectively provided with between
Gap.Specifically, voice coil loudspeaker voice coil is arranged in gap, and arranging of magnetic circuit assembly can be that the vibration of voice coil loudspeaker voice coil provides enough magnetic field energy, this
The magnetic field component of embodiment, by laterally offering the first groove 21 on the base 20 of T ferrum 100, can make supersound projector
The heat that voice coil loudspeaker voice coil produces and extraneous air carry out heat exchange effectively, make the voice coil loudspeaker voice coil of supersound projector obtain good vibration effect
Really.
Needing to understand, the first groove 21 described in the utility model is not limited to be arranged on base 20, it is also possible to set
Put on described magnet steel 200 or front plate 300, more have very, can be same on base 20, magnet steel 200 and front plate 300
Time the first groove 21 is set, the circulation speed of air in the heat dissipation channel that some described first grooves 21 are constituted can be accelerated
Degree, plays the effect of quick heat radiating cooling.
As the preferred version of the magnetic circuit assembly of the present embodiment, magnetic circuit assembly also includes being arranged at the short circuit outside magnetic core 10
Ring 400, in the short-circuited conducting sleeve 400 gap between magnet steel 200 and magnetic core 300.In the present embodiment, voice coil loudspeaker voice coil be arranged at magnetic core 10 with
In gap between magnet steel 200, front plate 300, between voice coil loudspeaker voice coil and magnet steel 200 and front plate 300, there is also gap, and short-circuit
Ring 400 is then provided in the gap between voice coil loudspeaker voice coil and front plate 300, and specifically, the lower end of short-circuited conducting sleeve 400 is positioned at the second groove
In 22.Arranging of short-circuited conducting sleeve 400 in the present embodiment can reduce inductance, makes voice coil loudspeaker voice coil input current increase, so that high-power
The high frequency output of speaker increases, frequency response broadening, reduces distortion.
As the magnetic circuit assembly further preferred embodiment of the present embodiment, short-circuited conducting sleeve 400 radially offers
Some through holes 401.The present embodiment sets up through hole 401 on the basis of being provided with the first groove 21, is improving voice coil loudspeaker voice coil radiating effect
While can promote the performance of supersound projector.
Wherein, the shape of the cross section of through hole 401 is unrestricted, and its shape is including but not limited to circular, square, runway
Type, trapezoidal, triangle etc.;The quantity of through hole 401 is the most unrestricted, depending on particular number is according to practical situation;Through hole 401 distance
The height of short-circuited conducting sleeve 400 lower end is the most unrestricted.
Preferably, through hole 401 is uniformly arranged on short-circuited conducting sleeve 400, can make a circle heat radiation further uniformly.
Preferably, the first groove 21 is rectified through hole 401 near the one of magnetic core 10, to improve in heat dissipation channel further
Cross-ventilation speed, accelerates rate of heat dispation.
Embodiment of the present utility model also provides for a kind of supersound projector, and as shown in Figure 8,9, it includes above-described embodiment
Described magnetic circuit assembly, also includes voice coil loudspeaker voice coil 500, frame 600, determines core and prop up sheet 700, sound basin group 800 and dust cap 900, frame
Terminal group it is additionally provided with outside 600.Concrete, connected mode and position relatively between each assembly are prior art, at this
Repeat no more.
Supersound projector of the present utility model is not limited to Fig. 8, the structure shown in 9, in every employing this utility model
Described T ferrum or the speaker of magnetic circuit assembly each fall within protection domain of the present utility model.
In the description of this specification, the description of reference term " preferred embodiment ", " optional embodiment " etc.
Mean to combine this embodiment or specific features, structure, material or feature that example describes be contained in of the present utility model at least
In one embodiment or example.In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical enforcement
Example or example.And, the specific features of description, structure, material or feature can in any one or more embodiments or
Example combines in an appropriate manner.
Above example only be used for detailed protocol of the present utility model is described, this utility model be not limited to above-mentioned in detail
Scheme, does not i.e. mean that this utility model has to rely on above-mentioned detailed protocol and could implement.Person of ordinary skill in the field
It will be clearly understood that to any improvement of the present utility model, the equivalence of raw material each to this utility model product is replaced and auxiliary element
Interpolation, concrete way choice etc., within the scope of all falling within protection domain of the present utility model and disclosure.
Claims (10)
1. a T ferrum, including cylindrical magnetic core (10), and is located on the lower end of described magnetic core (10) and described magnetic core
(10) base (20) being coaxially disposed, it is characterised in that be provided with on described base (20) and make extraneous air act on described magnetic
Some first grooves (21) of core (10), the axis of described magnetic core (10) is perpendicular to the plane at described first groove (21) place.
T ferrum the most according to claim 1, it is characterised in that described first groove (21) centrage along its length
For straight line.
T ferrum the most according to claim 1, it is characterised in that some described first grooves (21) are along described base (20)
Radial equipartition.
T ferrum the most according to claim 1, it is characterised in that described first groove (21) is positioned at the upper of described base (20)
Surface;Or, described first groove (21) is positioned at the sidewall of described base (20).
T ferrum the most according to claim 1, it is characterised in that described base (20) sets near the side of described magnetic core (10)
Being equipped with the second groove (22), described second groove (22) is arranged around the periphery of described magnetic core (10), and described first groove
(21) it is connected with described second groove (22).
6. a magnetic circuit assembly, it is characterised in that include the T ferrum (100) described in any one of claim 1 to 5, also include and institute
State magnet steel (200) and front plate (300), described magnet steel (200) and described fore-clamp that the magnetic core (10) of T ferrum (100) is coaxially disposed
Plate (300) is set in turn on described base (20) from the bottom to top, described magnet steel (200), described front plate (300) and described T
It is respectively provided with gap between the described magnetic core (10) of ferrum (100).
Magnetic circuit assembly the most according to claim 6, it is characterised in that also include being arranged at the short of described magnetic core (10) outside
Road ring (400), described short-circuited conducting sleeve (400) is positioned in the gap between described magnet steel (200) and described magnetic core (10).
Magnetic circuit assembly the most according to claim 7, it is characterised in that described short-circuited conducting sleeve radially offers on (400)
Some through holes (401).
Magnetic circuit assembly the most according to claim 8, it is characterised in that described first groove (21) is near described magnetic core (10)
One rectify to described through hole (401).
10. a supersound projector, it is characterised in that include the magnetic circuit assembly described in any one of claim 6 to 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620768317.4U CN205847548U (en) | 2016-07-19 | 2016-07-19 | T ferrum, magnetic circuit assembly and supersound projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620768317.4U CN205847548U (en) | 2016-07-19 | 2016-07-19 | T ferrum, magnetic circuit assembly and supersound projector |
Publications (1)
Publication Number | Publication Date |
---|---|
CN205847548U true CN205847548U (en) | 2016-12-28 |
Family
ID=57625957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201620768317.4U Active CN205847548U (en) | 2016-07-19 | 2016-07-19 | T ferrum, magnetic circuit assembly and supersound projector |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN205847548U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105959880A (en) * | 2016-07-19 | 2016-09-21 | 国光电器股份有限公司 | T iron, magnetic circuit assembly and high-power loudspeaker |
CN107465989A (en) * | 2017-09-27 | 2017-12-12 | 嘉兴市金利达电子有限公司 | A kind of rotary magnet steel copper wire Winder |
CN112040379A (en) * | 2020-09-02 | 2020-12-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil heating device |
-
2016
- 2016-07-19 CN CN201620768317.4U patent/CN205847548U/en active Active
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105959880A (en) * | 2016-07-19 | 2016-09-21 | 国光电器股份有限公司 | T iron, magnetic circuit assembly and high-power loudspeaker |
CN107465989A (en) * | 2017-09-27 | 2017-12-12 | 嘉兴市金利达电子有限公司 | A kind of rotary magnet steel copper wire Winder |
CN107465989B (en) * | 2017-09-27 | 2023-10-13 | 嘉兴市金利达电子有限公司 | Rotary magnetic steel copper wire winding device |
CN112040379A (en) * | 2020-09-02 | 2020-12-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil heating device |
CN112040379B (en) * | 2020-09-02 | 2021-10-29 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil heating device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN205847548U (en) | T ferrum, magnetic circuit assembly and supersound projector | |
CN105959880A (en) | T iron, magnetic circuit assembly and high-power loudspeaker | |
CN204498361U (en) | Voice coil loudspeaker voice coil and be provided with the loud speaker of this voice coil loudspeaker voice coil | |
CN208706394U (en) | Transformer and magnetic core assembly thereof | |
TW201113913A (en) | Transformer structure | |
CN205595920U (en) | Embedded rotor structure | |
WO2015106594A1 (en) | Hybrid excitation magnetic integrated inductor | |
WO2017129073A1 (en) | Dry-type transformer having foldable three-dimensional double-opening iron core | |
CN105187999A (en) | Novel high-fidelity low-medium-high frequency loudspeaker with sensitive transient response | |
TW200522095A (en) | Transformer structure | |
CN208638677U (en) | Sounding monomer | |
CN107040854A (en) | Annular omnidirectional loudspeaker and audio amplifier | |
CN204859551U (en) | Low well tweeter of novel high -fidelity that transient response is sensitive | |
CN205846887U (en) | A kind of efficient motor stator punching | |
CN202310081U (en) | Voice coil and loudspeaker with same | |
CN206558297U (en) | The ring-like Flat wire vertical winding inductor of high-cooling property | |
CN202282862U (en) | Ventilation type loudspeaker magnetic circuit structure | |
CN205039034U (en) | Three -phase magnetic metal powder core structure of symmetry effective air gap | |
CN208337867U (en) | Sound film and loudspeaker | |
CN107248793A (en) | Tangential motor, tangential rotor and its rotor core | |
CN207425510U (en) | SMD power inductor | |
CN209561149U (en) | A kind of exoskeletal heavy-current inductor | |
CN103260119B (en) | The thin speaker of low distortion | |
CN206236521U (en) | High frequency transformer | |
CN207075088U (en) | Magnetic speaker |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |