CN219738667U - Magnetic core - Google Patents
Magnetic core Download PDFInfo
- Publication number
- CN219738667U CN219738667U CN202320635188.1U CN202320635188U CN219738667U CN 219738667 U CN219738667 U CN 219738667U CN 202320635188 U CN202320635188 U CN 202320635188U CN 219738667 U CN219738667 U CN 219738667U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- gap
- extension
- extension portion
- pillar
- 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
- 238000004804 winding Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
Abstract
The utility model discloses a magnetic core, comprising: the first magnetic pillar, the second magnetic pillar, the third magnetic pillar and the plurality of extension parts. The first magnetic column comprises a first end and a second end. The second magnetic column comprises a third end and a fourth end. The third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column. The first magnetic column, the second magnetic column and the third magnetic column are provided with mutually extending extension parts, and a gap is formed at one end of each extension part, wherein the gap is mutually spaced. According to the utility model, the gap positions reserved by the extending parts between the magnetic columns are different from the winding positions of the coils, so that the heat generated by the gaps is prevented from being guided to the coils, and the factor of coil impedance loss is reduced, thereby improving the power supply efficiency.
Description
Technical Field
The utility model relates to the technical field of heat dissipation of magnetic cores, in particular to a magnetic core.
Background
In the prior art, the traditional magnetic core design is that an air gap is reserved at the position of the center pillar, namely, a gap is reserved at the position of the magnetic core combination, and the magnetic permeability of air is far lower than that of the iron core, so that magnetomotive force can stay on the air gap, the magnetic resistance is increased, the magnetic permeability and the residual magnetism are reduced, and the air gap can increase the saturation current, so that the magnetic core is prevented from generating magnetic saturation during working, and the inductance is better controlled. However, magnetic force lines are generated around the air gap, and when the magnetic force lines strike copper wires, heat dissipation is generated.
Disclosure of Invention
The embodiment of the utility model provides a magnetic core, which solves the problem that magnetic force lines are generated around an air gap at present, and when the magnetic force lines strike copper on line, heating loss is generated.
In order to solve the technical problems, the utility model is realized as follows:
a first aspect provides a magnetic core, comprising: the first magnetic column, the second magnetic column, the third magnetic column, the first extension portion, the second extension portion, the third extension portion and the fourth extension portion. The first magnetic column comprises a first end and a second end; the second magnetic column comprises a third end and a fourth end; the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column; the first extension part extends from the first end to the fifth end; the second extension part extends from the second end to the sixth end; the third extension part extends from the third end to the fifth end; the fourth extension part extends from the fourth end to the sixth end.
In one embodiment, a first gap is provided between the first extension portion and the fifth end.
In one embodiment, a second gap is provided between the second extension portion and the sixth end.
A second aspect provides a magnetic core, comprising: the first magnetic column, the second magnetic column, the third magnetic column, the first extension portion, the second extension portion, the third extension portion and the fourth extension portion. The first magnetic column comprises a first end and a second end; the second magnetic column comprises a third end and a fourth end; the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column; the first extension part extends from the fifth end to the first end; the second extension part extends from the sixth end to the second end; the third extension part extends from the fifth end to the third end; the fourth extension portion extends from the sixth end to the fourth end.
In one embodiment, a first gap is provided between the first extension and the first end.
In one embodiment, a second gap is provided between the second extension portion and the second end.
A third aspect provides a magnetic core, comprising: the first magnetic column, the second magnetic column, the third magnetic column, the first extension portion, the second extension portion, the third extension portion, the fourth extension portion, the fifth extension portion, the sixth extension portion, the seventh extension portion, and the eighth extension portion. The first magnetic column comprises a first end and a second end; the second magnetic column comprises a third end and a fourth end; the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column; the first extension part extends from the first end to the fifth end; the second extension part extends from the second end to the sixth end; the third extension part extends from the third end to the fifth end; the fourth extension part extends from the fourth end to the sixth end; the fifth extension part extends from the fifth end to the first extension part; the sixth extension part extends from the sixth end to the second extension part; the seventh extending part extends from the fifth end to the third extending part; the eighth extension portion extends from the sixth end toward the fourth extension portion.
In one embodiment, a first gap is provided between the first extension portion and the fifth extension portion.
In one embodiment, a second gap is formed between the second extension portion and the sixth extension portion.
In one embodiment, a third gap is provided between the third extension portion and the seventh extension portion.
The utility model provides a magnetic core, which can avoid the heating of a coil through a gap reserved by an extension part arranged between magnetic columns, and meanwhile, compared with the gap loss generated by the gap arranged on the magnetic columns, the gap is lower, and the gap can rapidly lead out the heat of the magnetic core so as to achieve the aim of improving the power supply efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a perspective view of a first embodiment of a magnetic core of the present utility model;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1;
FIG. 3 is an exploded view of a first embodiment of the magnetic core of the present utility model;
FIG. 4 is a perspective view of a second embodiment of the magnetic core of the present utility model;
FIG. 5 is a cross-sectional view taken along line B-B' of FIG. 4;
FIG. 6 is an exploded view of a second embodiment of the magnetic core of the present utility model;
FIG. 7 is a perspective view of a third embodiment of a magnetic core of the present utility model;
FIG. 8 is a cross-sectional view taken along line C-C' of FIG. 7; and
fig. 9 is an exploded view of a third embodiment of the magnetic core of the present utility model.
The following description is given with reference to the accompanying drawings: 1, a magnetic core; 11, a first magnetic column; 111, a first end; 112 a second end; 12, a second magnetic column; 121, a third end; 122 a fourth end; 13, a third magnetic column; 13A, a third upper magnetic column; 13B, a third lower magnetic column; 131 a fifth end; 132, sixth end; 14, a first extension part; 14D, a fifth extension; 15, a second extension part; 15D, a sixth extension; a third extension 16; 16D, a seventh extension; 17 a fourth extension; 17D, eighth extension; 21, a first gap; 22 a second gap; 23, a third gap; 24, a fourth gap; 3, insulating part; 4, coil.
Detailed Description
Various embodiments of the utility model are disclosed in the following drawings, in which details of the various embodiments are set forth in the following description for purposes of explanation. However, it should be understood that the details of these implementations are not to be taken as limiting the utility model. In the following embodiments, the same or similar components will be denoted by the same reference numerals.
Please refer to fig. 1 to 3. Fig. 1 is a perspective view of a first embodiment of a magnetic core of the present utility model.
Fig. 2 is a cross-sectional view taken along line A-A' of fig. 1. Fig. 3 is an exploded view of a first embodiment of the magnetic core of the present utility model. As shown in the drawings, the present utility model provides a magnetic core 1 including: a first magnetic pillar 11, a second magnetic pillar 12, a third magnetic pillar 13, a first extension 14, a second extension 15, a third extension 16, and a fourth extension 17. The first magnetic pillar 11 includes a first end 111 and a second end 112. The second magnetic pillar 12 includes a third end 121 and a fourth end 122. The third magnetic pillar 13 includes a fifth end 131 and a sixth end 132, and the third magnetic pillar 13 is disposed between the first magnetic pillar 11 and the second magnetic pillar 12. The first extension 14 extends from the first end 111 to the fifth end 131. The second extension 15 extends from the second end 112 to the sixth end 132. The third extension 16 extends from the third end 121 to the fifth end 131. The fourth extension 17 extends from the fourth end 122 to the sixth end 132.
In the present embodiment, the first magnetic pillar 11, the first extension portion 14 and the second extension portion 15 are integrally formed, wherein a first gap 21 is provided between the first extension portion 14 and the fifth end 131, and a second gap 22 is provided between the second extension portion 15 and the sixth end 132. The second magnetic pole 12, the third extension portion 16 and the fourth extension portion 17 are integrally formed, wherein a third gap 23 is provided between the third extension portion 16 and the fifth end 131, and a fourth gap 24 is provided between the fourth extension portion 17 and the sixth end 132. The magnetic core 1 of the present embodiment is configured to be symmetrical about the third magnetic pole 13, wherein the first magnetic pole 11 and the second magnetic pole 12 are symmetrical to each other, the first extension portion 14 and the third extension portion 16 are symmetrical to each other, the second extension portion 15 and the fourth extension portion 17 are symmetrical to each other, the first gap 21 and the third gap 23 are symmetrical to each other, and the second gap 22 and the fourth gap 24 are symmetrical to each other.
The first gap 21, the second gap 22, the third gap 23, and the fourth gap 24 of the magnetic core 1 of the present embodiment are located on both sides of the third magnetic pole 13, that is, the first gap 21 and the second gap 22 are located between the third magnetic pole 13 and the first magnetic pole 11, and the third gap 23 and the fourth gap 24 are located between the third magnetic pole 13 and the second magnetic pole 12. The first extension 14, the third extension 16, the first gap 21 and the third gap 23 are located on the same plane, that is, the first end 111 of the first magnetic pillar 11, the third end 121 of the second magnetic pillar 12 and the fifth end 131 of the third magnetic pillar 13 are located on the same end face. Furthermore, the second extension portion 15, the fourth extension portion 17, the second gap 22 and the fourth gap 24 are located on the same plane, i.e. the second end 112 of the first magnetic pillar 11, the fourth end 122 of the second magnetic pillar 12 and the sixth end 132 of the third magnetic pillar 13 are located on the same end face.
Furthermore, the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 of the magnetic core 1 are further connected by filling through an insulating member 3, wherein the insulating member 3 is a retaining wall tape, kraft paper, insulating paper or mailer tape.
The structure of the magnetic core 1 of the present embodiment includes a can-type magnetic core, RM-type magnetic core, E-type magnetic core, EC, ETD, EER-type magnetic core, PQ-type magnetic core, EP-type magnetic core, and the like. The present embodiment is not limited to the structure of the magnetic core 1. The structure of the magnetic core 1 can be selected according to the requirement of the user, and the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 are disposed at the corresponding positions of the magnetic core 1. Further, the magnetic columns of the first magnetic column 11, the second magnetic column 12 and the third magnetic column 13 may also comprise a cylinder, a rectangular body, an elliptic cylinder or a hollow cylinder, etc., and the shape of the magnetic column may be selected according to the requirement of the user. In addition, the gap widths of the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 can be adjusted according to the requirements of the user.
In the present embodiment, after the user winds the coil 4 around the third magnetic pillar 13, the first magnetic pillar 11, the first extension portion 14 and the second extension portion 15 are assembled on one side of the third magnetic pillar 13, and the second magnetic pillar 12, the third extension portion 16 and the fourth extension portion 17 are assembled on the other side of the third magnetic pillar 13, wherein the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 are filled and connected through the insulating member 3, and then the outer periphery of the magnetic core 1 is encapsulated and fixed.
In the present embodiment, the first gap 21, the second gap 22, the third gap 23, and the fourth gap 24 are reserved by the extension portions between the magnetic poles of the magnetic core 1. The positions of the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 are not on the third magnetic pillar 13 around which the coil 4 is wound, so that the factor of causing the coil impedance loss can be reduced because the heat source generated by the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 is directly led to the coil 4. Meanwhile, the gap loss generated by the positions of the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 is low. The first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 can also rapidly conduct out the heat of the magnetic core 1 so as to achieve the purpose of improving the power efficiency.
Please refer to fig. 4 to fig. 6. Fig. 4 is a perspective view of a second embodiment of the magnetic core of the present utility model.
Fig. 5 is a cross-sectional view taken along line B-B' of the drawing. Fig. 6 is an exploded view of a second embodiment of the magnetic core of the present utility model. As shown in the drawing, the difference of the present embodiment from the first embodiment is the arrangement of the first extension portion 14, the second extension portion 15, the third extension portion 16, and the fourth extension portion 17 of the magnetic core 1. The first extension 14 of the present embodiment extends from the fifth end 131 toward the first end 111. The second extension 15 extends from the sixth end 132 toward the second end 112. The third extension 16 extends from the fifth end 131 to the third end 121. The fourth extension 17 extends from the sixth end 132 to the fourth end 122.
In the present embodiment, the third magnetic pillar 13 is divided into a third upper magnetic pillar 13A and a third lower magnetic pillar 13B, the third upper magnetic pillar 13A, the first extension portion 14 and the third extension portion 16 are integrally formed, the third lower magnetic pillar 13B, the second extension portion 15 and the fourth extension portion 17 are integrally formed, wherein a first gap 21 is provided between the first extension portion 14 and the first end 111, a second gap 22 is provided between the second extension portion 15 and the second end 112, a third gap 23 is provided between the third extension portion 16 and the third end 121, and a fourth gap 24 is provided between the fourth extension portion 17 and the fourth end 122. In the present embodiment, the first gap 21, the second gap 22, the third gap 23, and the fourth gap 24 of the magnetic core 1 are further connected by filling with the insulator 3, and the description thereof will not be repeated.
In the present embodiment, the coil 4 is first wound between the third upper magnetic pillar 13A, the first extending portion 14 and the third extending portion 16, and the third lower magnetic pillar 13B, the second extending portion 15 and the fourth extending portion 17, and then the first magnetic pillar 11 and the second magnetic pillar 12 are assembled on both sides of the above structure, wherein the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24 are filled with the insulating member 3 to connect the first magnetic pillar 11 and the second magnetic pillar 12, and the outer periphery of the magnetic core 1 is then fixed by taping.
Please refer to fig. 7 to fig. 9. Fig. 7 is a perspective view of a third embodiment of the magnetic core of the present utility model.
Fig. 8 is a cross-sectional view taken along line C-C' of the drawing. Fig. 9 is an exploded view of a third embodiment of the magnetic core of the present utility model. As shown in the drawing, the difference of the present embodiment compared to the first embodiment is that the magnetic core 1 further includes a fifth extension portion 14D, a sixth extension portion 15D, a seventh extension portion 16D, and an eighth extension portion 17D. The fifth extension portion 14D of the present embodiment extends from the fifth end 131 toward the first extension portion 14. The sixth extension 15D extends from the sixth end 132 toward the second extension 15. The seventh extension 16D extends from the fifth end 131 toward the third extension 16. The eighth extension 17D extends from the sixth end 132 toward the fourth extension 17.
In the present embodiment, the first magnetic pillar 11, the first extension portion 14 and the second extension portion 15 are integrally formed, the second magnetic pillar 12, the third extension portion 16 and the fourth extension portion 17 are integrally formed, the third magnetic pillar 13 is divided into a third upper magnetic pillar 13A and a third lower magnetic pillar 13B, the third upper magnetic pillar 13A, the fifth extension portion 14D and the seventh extension portion 16D are integrally formed, and the third lower magnetic pillar 13B, the sixth extension portion 15D and the eighth extension portion 17D are integrally formed, wherein a first gap 21 is provided between the first extension portion 14 and the fifth extension portion 14D. A second gap 22 is provided between the second extension 15 and the sixth extension 15D. A third gap 23 is provided between the third extension 16 and the seventh extension 16D. A fourth gap 24 is provided between the fourth extension 17 and the eighth extension 17D. In the present embodiment, the first gap 21, the second gap 22, the third gap 23, and the fourth gap 24 of the magnetic core 1 are further connected by filling with the insulator 3, and the description thereof will not be repeated.
The composition of this embodiment is the same as the combination of the first embodiment and the second embodiment. After the coil 4 is wound between the constituent structures of the third upper magnetic pillar 13A, the fifth extension portion 14D and the seventh extension portion 16D and the constituent structures of the third lower magnetic pillar 13B, the sixth extension portion 15D and the eighth extension portion 17D, the integrated structure of the first magnetic pillar 11, the first extension portion 14 and the second extension portion 15 is assembled on one side of the third magnetic pillar 13, and the integrated structure of the second magnetic pillar 12, the third extension portion 16 and the fourth extension portion 17 is assembled on the other side of the third magnetic pillar 13, wherein the first magnetic pillar 11 and the second magnetic pillar 12 are connected through the filling of the insulating member 3 in the first gap 21, the second gap 22, the third gap 23 and the fourth gap 24, and the outer periphery of the magnetic core 1 is further fixed by taping.
In summary, the present utility model provides a magnetic core, including: the first magnetic column, the second magnetic column, the third magnetic column and the plurality of extension parts. The first magnetic column comprises a first end and a second end. The second magnetic column comprises a third end and a fourth end. The third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column. The first magnetic column, the second magnetic column and the third magnetic column are provided with mutually extending extension parts, and a gap is formed at one end of each extension part, wherein the gap is mutually spaced. The utility model can avoid the heating of the coil through the gap reserved by the extension part between the magnetic columns. Meanwhile, the gap loss generated by the gap position is low, and the gap can rapidly lead out the heat of the magnetic core so as to improve the power supply efficiency.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The foregoing description illustrates and describes several preferred embodiments of the present utility model. It is to be understood, however, that this utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, but is capable of use in various other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept herein, either as a result of the foregoing teachings or as a result of the knowledge or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (10)
1. A magnetic core, comprising:
the first magnetic column comprises a first end and a second end;
the second magnetic column comprises a third end and a fourth end;
the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column;
a first extension extending from the first end toward the fifth end;
a second extension extending from the second end toward the sixth end;
a third extension extending from the third end to the fifth end; and
and a fourth extension extending from the fourth end to the sixth end.
2. The magnetic core of claim 1, wherein there is a first gap between the first extension and the fifth end.
3. The magnetic core of claim 2, wherein a second gap is provided between the second extension and the sixth end.
4. A magnetic core, comprising:
the first magnetic column comprises a first end and a second end;
the second magnetic column comprises a third end and a fourth end;
the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column;
a first extension extending from the fifth end toward the first end;
a second extension extending from the sixth end toward the second end;
a third extension extending from the fifth end to the third end; and
and a fourth extension extending from the sixth end toward the fourth end.
5. The magnetic core of claim 4, wherein a first gap is provided between the first extension and the first end.
6. The magnetic core of claim 5, wherein a second gap is provided between the second extension and the second end.
7. A magnetic core, comprising
The first magnetic column comprises a first end and a second end;
the second magnetic column comprises a third end and a fourth end;
the third magnetic column comprises a fifth end and a sixth end, and is arranged between the first magnetic column and the second magnetic column;
a first extension extending from the first end toward the fifth end;
a second extension extending from the second end toward the sixth end;
a third extension extending from the third end to the fifth end;
a fourth extension extending from the fourth end to the sixth end;
a fifth extension extending from the fifth end toward the first extension;
a sixth extension extending from the sixth end toward the second extension;
a seventh extension extending from the fifth end toward the third extension; and
and an eighth extension portion extending from the sixth end toward the fourth extension portion.
8. The magnetic core of claim 7, wherein there is a first gap between the first extension and the fifth extension.
9. The magnetic core of claim 8, wherein a second gap is provided between the second extension and the sixth extension.
10. The magnetic core of claim 9, wherein a third gap is provided between the third extension and the seventh extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635188.1U CN219738667U (en) | 2023-03-28 | 2023-03-28 | Magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635188.1U CN219738667U (en) | 2023-03-28 | 2023-03-28 | Magnetic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219738667U true CN219738667U (en) | 2023-09-22 |
Family
ID=88055192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320635188.1U Active CN219738667U (en) | 2023-03-28 | 2023-03-28 | Magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219738667U (en) |
-
2023
- 2023-03-28 CN CN202320635188.1U patent/CN219738667U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11967446B2 (en) | Packaging structure of a magnetic device | |
| US7679482B2 (en) | Inductor | |
| JP2001332430A (en) | Transformer | |
| JPH0715853B2 (en) | Energy storage type ignition coil | |
| EP3382723A1 (en) | Transformer and method for manufacturing transformer | |
| JPH11251164A (en) | Compact choke coil | |
| CN219738667U (en) | Magnetic core | |
| CN116598101A (en) | Low-leakage high-frequency power inductor | |
| CN217386866U (en) | Integrated transformer | |
| JP5189637B2 (en) | Coil parts and power supply circuit using the same | |
| TWM643472U (en) | magnetic core | |
| TW200847200A (en) | Transformer and insulating cover thereof | |
| US20220189687A1 (en) | Leakage transformer | |
| CN207097625U (en) | A kind of high frequency AH series inductance structures | |
| JP4183194B2 (en) | Inductance element | |
| JP3801686B2 (en) | Power inductor | |
| CN110660566A (en) | Single E-type inductor | |
| CN212182062U (en) | Power inductor for high and low load scene | |
| TWI816289B (en) | Coupled inductor and the method to make the same | |
| JP2005079546A (en) | Low-height coil component | |
| JP2002043139A (en) | Thin inductor | |
| CN111477427A (en) | Power inductor for high and low load scene | |
| JPH118130A (en) | E type core for winding wire component of high-requency transformer or the like | |
| JP2508000Y2 (en) | Converter transformer | |
| JPH0686320U (en) | Coil bobbin for thin high-voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |