CN213815692U - Plug-in PTC protector - Google Patents
Plug-in PTC protector Download PDFInfo
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- CN213815692U CN213815692U CN202022505146.5U CN202022505146U CN213815692U CN 213815692 U CN213815692 U CN 213815692U CN 202022505146 U CN202022505146 U CN 202022505146U CN 213815692 U CN213815692 U CN 213815692U
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Abstract
The utility model relates to a plug-in PTC protector, include: the chip comprises a first metal electrode foil, a second metal electrode foil and a chip connected between the first metal electrode foil and the second metal electrode foil, wherein the chip consists of two parts, namely a non-good conductor material structural part and a PTC polymer conductive composite material structural part which are arranged on the same plane, and the two structural parts are in close contact with each other. The utility model discloses well good conductor material part has the characteristic of bearing great external pressure, and PTC protector plug is connected to the circuit, and the contact point that directly bears external pressure can set up in the region of this good conductor material part, the utility model discloses can avoid PTC polymer conductive composite material part to directly bear external pressure to play the effect that prevents that the PTC protector from receiving external pressure or voltage breakdown inefficacy; meanwhile, the chip of the PTC protector can be thinned, so that the PTC protector can have lower resistance and higher current capacity.
Description
Technical Field
The utility model relates to a plug-in PTC protector technical field specifically indicates a plug-in PTC protector that can bear external pressure.
Background
The resistance and the temperature of the PTC protector made of the polymer-based conductive composite material generally have a nonlinear relation, the interval between conductive particles is increased due to the thermal expansion of a polymer matrix along with the increase of the temperature, so that the volume resistivity of the material is increased, and when the external temperature is close to the melting point of the polymer matrix, the thermal expansion of the matrix is most remarkable, and the interval between the conductive particles is sharply increased, so that the volume resistivity of the polymer conductive composite material (hereinafter, referred to as PTC polymer conductive composite material) with a positive temperature coefficient effect (PTC) can be increased by several orders of magnitude, namely the PTC (positive temperature coefficient of resistance) effect is generated. The PTC polymer conductive composite material has a plurality of applications in the fields of electronic circuit protection elements, heaters, sensors and the like.
In the field of vehicle-mounted motors, particularly door lock and waist support vehicle-mounted motors, a PTC protector scheme is generally adopted for preventing overcurrent and overheating of the motors. The vehicle-mounted motor is small in size, small in internal space, generally prone to being installed inside the motor through the plug-in PTC protector, and connected into the motor circuit in series through the metal elastic piece clamping PTC protector, so that the purposes of automatic assembly and reduction of component cost are achieved. However, the clip clamping can generate external pressure on the PTC protector, limit the thermal expansion of the polymer matrix forming the PTC protector, and lead the conductive particle chain not to be disconnected, thus leading to protection failure; and under the normal working voltage, even the PTC protector can generate electric breakdown failure under the normal working voltage due to the existence of external pressure.
The conventional plug-in PTC protector has a structure as shown in fig. 1, and includes first and second metal electrode foils 1 'and 2' and a PTC polymer conductive composite 3 ', the PTC polymer conductive composite 3' being sandwiched between the first and second metal electrode foils 1 'and 2'.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: a plug-in PTC protector capable of withstanding external pressure is provided, in which a contact point directly withstanding external pressure is provided on a partial region of the PTC protector, instead of a PTC material portion.
The utility model discloses technical problem solves through following scheme: a plug-in PTC protector comprising:
a first metal electrode foil;
a second metal electrode foil;
and the chip is connected between the first metal electrode foil and the second metal electrode foil, consists of a non-benign conductor material structural member and a PTC conductive composite material structural member, is positioned on the same plane, and is in close contact with the non-benign conductor material structural member and the PTC conductive composite material structural member.
On the basis of the scheme, the total thickness of the plug-in PTC protector is 0.1-10 mm.
On the basis of the scheme, the plug-in PTC protector is in one of a circular shape, a rectangular shape, a triangular shape, a trapezoidal shape, a rhombic shape or other polygonal shapes.
The resistivity of the poor conductor material is not less than 100 omega cm at the ambient temperature of 25 ℃.
Furthermore, the poor conductor material is selected from at least one of polyethylene, epoxy resin, polyvinylidene fluoride, thermosetting polyester resin, polypropylene and glass fiber cloth preimpregnated with epoxy resin.
The PTC polymer conductive composite material has the resistivity not more than 10 omega cm at the ambient temperature of 25 ℃.
Furthermore, the poor conductor material part is a continuous integral structural part or a split structural part, has the same thickness as the PTC polymer conductive composite material part, and is arranged on one side or in the middle of the polymer conductive composite material part when being the integral structural part; when the PTC conductive composite material is a split structural member, the PTC conductive composite material is distributed on the outer side of the PTC polymer conductive composite material part and is symmetrically distributed.
The utility model has the advantages that: when the PTC protector is connected to a circuit, a contact point which directly bears external pressure can be arranged in the area of the poor conductor material part of the PTC protector, so that the polymer conductive composite material layer is prevented from directly bearing the external pressure, the polymer matrix of the PTC protector can be fully thermally expanded, the conductive particle chain is disconnected, and failure is avoided; meanwhile, the PTC protector is prevented from being broken down by external pressure or voltage; the utility model discloses a but PTC protector's chip slimming can possess lower level and higher through-current capacity.
The present invention will be described in further detail with reference to specific examples.
Drawings
FIG. 1 is a schematic structural diagram of a conventional plug-in PTC protector;
fig. 2 is a schematic structural view of a plug-in PTC protector according to a first embodiment of the present invention, in which fig. 2a is an exploded view of the plug-in PTC protector, and fig. 2b is a sectional view of the plug-in PTC protector in a thickness direction;
fig. 3 is a schematic structural view of a plug-in PTC protector according to a second embodiment of the present invention, in which fig. 3a is an exploded view of the plug-in PTC protector, and fig. 3b is a sectional view of the plug-in PTC protector in a thickness direction;
fig. 4 is a schematic structural view of a plug-in PTC protector according to a third embodiment of the present invention, in which fig. 4a is an exploded view of the plug-in PTC protector, and fig. 4b is a sectional view of the plug-in PTC protector in a thickness direction;
fig. 5 is a schematic structural view of a plug-in PTC protector according to a fourth embodiment of the present invention, in which fig. 5a is an exploded view of the plug-in PTC protector, and fig. 5b is a sectional view of the plug-in PTC protector in a thickness direction;
fig. 6 is an exploded view of a plug-in PTC protector according to a fifth embodiment of the present invention;
fig. 7 is an exploded view of a plug-in PTC protector according to a sixth embodiment of the present invention;
the reference numbers in the figures illustrate:
1-a first metal electrode foil;
2-second metal electrode foil;
3-PTC conductive composite structural member;
31. 32-rectangular PTC conductive composite material structural members I and II;
4-strip-shaped non-benign conductor material pieces;
5-rectangular non-benign conductor material;
61. 62-structural members I and II of strip-shaped non-benign conductor materials;
71. 72, 73, 74-triangular non-benign conductor materials one, two, three, four;
8-round non-benign conductor material structure;
9-Square non-benign conductor material structure.
Detailed Description
Example 1
As shown in fig. 2a, which is an exploded view of the plug-in PTC protector, and fig. 2b, which is a sectional view of the plug-in PTC protector in the thickness direction:
a plug-in PTC protector comprising: a first metal electrode foil 1, a second metal electrode foil 2, a chip connected between the first and second metal electrode foils 1, 2, the chip is composed of two parts, and has the same thickness on the same plane, comprising: the PTC conductive composite material structure comprises a rectangular PTC conductive composite material structural component 3 and a strip-shaped non-benign conductor material structural component 4, wherein one side of the rectangular PTC conductive composite material structural component 3 in the width direction is tightly contacted with one long side of the strip-shaped non-benign conductor material structural component 4.
In the embodiment, the PTC conductive composite material is a blending composite of polyethylene and carbon black, and the resistivity is 0.67 omega-cm at the ambient temperature of 25 ℃; the non-benign conductor material 4 is made of polyethylene and is at the ambient temperatureDegree 25 deg.C, resistivity of 1 × 1017Ω.cm。
The main dimensions of the finished product in this example are: the total thickness is 0.3mm, the total length is 11mm, and the total width is 8mm, wherein the strip-shaped non-benign conductor material structural member 4 is a strip-shaped structure with the length of 8mm and the width of 2 mm; the PTC conductive composite material structural member 3 is a rectangular structure with the length of 9mm and the width of 8 mm.
When the plug-in PTC protector is directly inserted into a circuit in series, the polyethylene material part in the strip-shaped area of the plug-in PTC protector is used as a directly stressed contact point, so that the condition that a polymer conductive composite material layer directly bears external pressure is avoided, the polymer matrix of the PTC protector is fully thermally expanded, a conductive particle chain is disconnected, and failure is avoided; and simultaneously, the PTC protector is prevented from being broken down and failing under the action of external pressure (voltage).
Example 2
As shown in fig. 3a, which is an exploded view of the plug-in PTC protector, and fig. 3b, which is a sectional view of the plug-in PTC protector in the thickness direction:
a plug-in PTC protector comprising: a first metal electrode foil 1, a second metal electrode foil 2, a chip connected between the first and second metal electrode foils 1, 2, the chip is composed of a PTC conductive composite material structural member and a non-benign conductor material structural member, and has the same thickness on the same plane, and comprises: the chip comprises a first rectangular PTC conductive composite material structural part, a second rectangular PTC conductive composite material structural part 31, a second rectangular PTC conductive composite material structural part 32 and a rectangular non-benign conductor material structural part 5, wherein two long sides of the rectangular non-benign conductor material structural part 5 are respectively in close contact with one long side of the first rectangular PTC conductive composite material structural part, the second rectangular PTC conductive composite material structural part 31, the second rectangular PTC conductive composite material structural part 5 and the second rectangular PTC conductive composite material structural part 32 to form sandwich structure chips.
In the embodiment, the PTC conductive composite material is a blending composite of polyvinylidene fluoride and carbon black, and the resistivity is 0.51 omega-cm at the ambient temperature of 25 ℃; the rectangular non-benign conductor material structural member 5 is made of epoxy resin and has the resistivity of 1 multiplied by 10 at the ambient temperature of 25 DEG C10Ω.cm。
This embodiment plug-in PTC protector is square, and the primary importance size is: the total thickness is 0.25mm, the total length is 5mm, and the total width is 5 mm. The length of the rectangular non-benign conductor material structural member 5 is 5mm, the width of the rectangular non-benign conductor material structural member is 1mm, and two long sides of the rectangular non-benign conductor material structural member 5 are respectively and tightly connected with the first PTC conductive composite material structural member, the second PTC conductive composite material structural member 31 and the second PTC conductive composite material structural member 32 which are identical in structural size.
When the plug-in PTC protector is directly inserted into a circuit in series, the epoxy resin material part in the rectangular area of the plug-in PTC protector is used as a contact point for directly bearing force, and the plug-in PTC protector has the advantage that the PTC protector is prevented from breakdown failure after being subjected to external force.
Example 3
As shown in fig. 4a, which is an exploded view of the plug-in PTC protector, and fig. 4b, which is a sectional view of the plug-in PTC protector in the thickness direction:
a plug-in PTC protector comprising: a first metal electrode foil 1, a second metal electrode foil 2, a chip connected between the first and second metal electrode foils 1, 2, the chip is composed of a PTC conductive composite material structural member and a non-benign conductor material structural member, and has the same thickness on the same plane, and comprises: the edges of the two width directions of the rectangular PTC conductive composite material structural member 3 are respectively and tightly connected with the length directions of the first strip-shaped non-benign conductor material structural member, the second strip-shaped non-benign conductor material structural member 61 and the second strip-shaped non-benign conductor material structural member 62, and the first strip-shaped non-benign conductor material structural member, the second strip-shaped non-benign conductor material structural member 61, the second strip-shaped non-benign conductor material structural member 3 and the second strip-shaped non-benign conductor material structural member 62 form sandwich structure chips sequentially.
The PTC conductive composite material is a blending composite of polyvinylidene fluoride and carbon black, and the resistivity is 0.45 omega-cm at the ambient temperature of 25 ℃; the non-benign conductor material is polyvinylidene fluoride material, and has a resistivity of 1 × 10 at 25 deg.C15Ω.cm。
This embodiment plug-in PTC protector is square, and the primary importance size is: the total thickness is 0.5mm, the total length is 7mm, the total width is 9mm, wherein, the rectangular PTC conductive composite material structural member 3 is a 7mm square sheet structural member, the length of the first strip-shaped non-benign conductor material structural member, the length of the second strip-shaped non-benign conductor material structural member, the width of the second strip-shaped non-benign conductor material structural member, and the width of the first strip-shaped non-benign conductor material structural member are 7mm and 1.5mm respectively.
When this embodiment plug-in PTC protector is established ties and is directly inserted in the circuit, this plug-in PTC protector's square region's polyvinylidene fluoride material part is as the contact point of direct atress, and the advantage lies in the PTC protector receiving external force after, avoids voltage breakdown to become invalid.
Example 4
As shown in fig. 5a, which is an exploded view of the plug-in PTC protector, and fig. 5b, which is a sectional view of the plug-in PTC protector in the thickness direction:
a plug-in PTC protector comprising: the chip is a chip which is integrally rectangular and is composed of a rectangular PTC conductive composite material structural part 3 with four unfilled corners and four triangular non-benign conductor material structural parts I, II, III, IV 71, 72, 73 and 74 which are identical in structure, the rectangular PTC conductive composite material structural part 3 with four unfilled corners is respectively and tightly connected with the triangular non-benign conductor material structural parts I, II, III, IV 71, 72, 73 and 74 which are identical in structure at the unfilled corners on the same plane, and the chip which is integrally rectangular is formed.
Wherein the PTC conductive composite material is a blended composite of low-density polyethylene and carbon black, and has a resistivity of 0.55 omega-cm at an ambient temperature of 25 ℃; the non-benign conductor material is made of thermosetting polyester resin and has a resistivity of 1 × 10 at 25 deg.C8Ω.cm。
The plug-in PTC protector of the embodiment is rectangular, and the main size is as follows: the total thickness is 0.2mm, the total length is 11mm, and the total width is 8 mm. The triangular non-benign conductor materials I, II, III, IV 71, 72, 73 and 74 are right-angle sectors, the diameters of the sectors are 3mm respectively, and the rectangular chips are formed after the rectangular chips are tightly connected with the PTC conductive composite materials 3 with four unfilled corners.
When the plug-in PTC protector is directly inserted into a circuit in series, the thermosetting polyester resin material part in the square area of the plug-in PTC protector is used as a contact point for directly bearing force, and the plug-in PTC protector has the advantage that the PTC protector is prevented from breakdown failure after being subjected to external force.
Example 5
Fig. 6 is an exploded view of the plug-in PTC protector:
a plug-in PTC protector comprising: the chip comprises a first metal electrode foil 1, a second metal electrode foil 2 and a chip connected between the first metal electrode foil 1 and the second metal electrode foil 2, wherein the chip consists of two parts, namely a round non-benign conductor material structural part 8 and a PTC conductive composite material structural part 3, wherein the round non-benign conductor material structural part 8 and the PTC conductive composite material structural part 3 are arranged on the same plane and have the same thickness, and the round non-benign conductor material structural part 8 is embedded in the round through hole of the middle PTC conductive composite material structural part 3 and is tightly connected with each other.
In the embodiment, the PTC conductive composite material is a blended composite of high-density polyethylene and carbon black, and the resistivity of the structural part of the PTC conductive composite material is 0.88 omega-cm at the ambient temperature of 25 ℃; the circular non-benign conductive material structure 8 is made of polypropylene and has a resistivity of 1 x 10 at an ambient temperature of 25 DEG C14Ω.cm。
This embodiment plug-in PTC protector is square, and the primary importance size is: the total thickness is 0.5mm, the total length is 7.5mm, and the total width is 9.3 mm. The round non-benign conductor material structural member 8 made of polypropylene is round, the diameter of the round non-benign conductor material structural member is 2.5mm, and the round non-benign conductor material structural member is embedded in the center of the rectangular PTC conductive composite material structural member 3 to form a chip.
When the plug-in PTC protector of the embodiment is directly inserted into a circuit in series, the polypropylene material part in the square area of the plug-in PTC protector is used as a contact point for directly bearing force, and the plug-in PTC protector has the advantage that the PTC protector is prevented from breakdown failure after being subjected to external force.
Example 6
Fig. 7 is an exploded view of the plug-in PTC protector:
a plug-in PTC protector comprising: the chip comprises a square non-benign conductor material structural part 9 and a PTC conductive composite material structural part 3, wherein the square non-benign conductor material structural part 9 is embedded in the square through hole of the PTC conductive composite material structural part 3, and the two parts are tightly attached.
Wherein the PTC conductive composite material is a blending composite of polyvinylidene fluoride and metallic nickel powder, and the resistivity is 0.18 omega-cm at the ambient temperature of 25 ℃; the rectangular non-benign conductor material part 9 is a glass fiber reinforced plastic structure member made of glass fiber cloth preimpregnated with epoxy resin material, and has a resistivity of 1 × 10 at 25 deg.C10Ω.cm。
This embodiment plug-in PTC protector is square, and the primary importance size is: the total thickness is 0.25mm, the total length is 7mm, and the total width is 9.5 mm. The square non-benign conductor material structural member 9 is 3mm long and 3mm wide and is embedded in the square through hole of the PTC conductive composite material structural member 3.
When the plug-in PTC protector of the embodiment is directly inserted into a circuit in series, the part, in the square area, of the glass fiber cloth preimpregnated with the epoxy resin material is used as a contact point for directly bearing force, and the plug-in PTC protector has the advantage that voltage breakdown failure is avoided after the PTC protector bears external force.
Claims (12)
1. A plug-in PTC protector is characterized in that: the method comprises the following steps:
a first metal electrode foil;
a second metal electrode foil;
and the chip is connected between the first metal electrode foil and the second metal electrode foil, consists of a non-benign conductor material structural member and a PTC conductive composite material structural member, is positioned on the same plane, and is in close contact with the non-benign conductor material structural member and the PTC conductive composite material structural member.
2. A plug-in PTC protector according to claim 1, wherein: the total thickness of the plug-in PTC protector is between 0.1 and 10 mm.
3. A plug-in PTC protector according to claim 1, wherein: the plug-in PTC protector is in one of a round shape, a rectangular shape, a triangular shape, a trapezoidal shape and a rhombic shape.
4. A plug-in PTC protector according to claim 1, wherein: the non-benign conductor material structural member has the resistivity not less than 100 omega cm at the ambient temperature of 25 ℃.
5. A plug-in PTC protector according to claim 1, wherein: the PTC conductive composite material structural member has the resistivity not more than 10 omega cm at the ambient temperature of 25 ℃.
6. A plug-in PTC protector according to any of claims 1 to 5, wherein: the non-benign conductor material structural part is a continuous integral structural part or a split structural part, has the same thickness as the PTC conductive composite material structural part, and is arranged on one side or in the middle of the polymer conductive composite material structural part when being the integral structural part; when the PTC conductive composite material structure is a split structure, the PTC conductive composite material structure is distributed on the outer side of the PTC conductive composite material structure and is symmetrically distributed.
7. The pluggable PTC protector according to claim 6, wherein: the chip is composed of a rectangular PTC conductive composite material structural part and a strip-shaped non-benign conductor material structural part, the two parts are on the same plane and have the same thickness, one side of the rectangular PTC conductive composite material structural part in the width direction is tightly contacted with one long side of the strip-shaped non-benign conductor material structural part, and the resistivity of the rectangular PTC conductive composite material structural part is 0.67 omega cm at the ambient temperature of 25 ℃; the resistivity of the strip-shaped non-benign conductor material structural part is 1 multiplied by 1017Ω.cm。
8. The pluggable PTC protector according to claim 6, wherein: the chip consists of a first rectangular PTC conductive composite material structural component and a second rectangular PTC conductive composite material structural component which have the same structure, and a rectangular non-benign conductor material structural component between the first structural component and the second structural component, wherein the rectangular PTC conductive composite material structural component and the rectangular non-benign conductor material structural component are on the same plane and have the same thickness,the two long sides of the rectangular non-benign conductor material structural part are respectively in close contact with one long side of the rectangular PTC conductive composite material structural part I and one long side of the rectangular PTC conductive composite material structural part II to form sandwich structure chips of the rectangular PTC conductive composite material structural part I, the rectangular non-benign conductor material structural part and the rectangular PTC conductive composite material structural part II in sequence, and the resistivity of the rectangular PTC conductive composite material structural part is 0.51 omega.cm at the ambient temperature of 25 ℃; the resistivity of the rectangular non-benign conductor material structural part is 1 multiplied by 1010Ω.cm。
9. The pluggable PTC protector according to claim 6, wherein: the chip consists of two strip-shaped non-benign conductor material structural parts I and II with the same structure and a rectangular PTC conductive composite material structural part, wherein the strip-shaped non-benign conductor material structural parts I and II and the rectangular PTC conductive composite material structural part are on the same plane and have the same thickness, the edges in the width direction of the rectangular PTC conductive composite material structural part II are respectively and tightly connected with the edges in the length direction of the strip-shaped non-benign conductor material structural parts I and II to form a sandwich structure chip which sequentially comprises the strip-shaped non-benign conductor material structural part I, the rectangular PTC conductive composite material structural part and the strip-shaped non-benign conductor material structural part II, the resistivity of the rectangular PTC conductive composite material structural part is 0.45 omega at the ambient temperature of 25 ℃, and the resistivity of the strip-shaped non-benign conductor material structural part is 1 multiplied by 1015Ω.cm。
10. The pluggable PTC protector according to claim 6, wherein: the chip is a chip which is integrally rectangular and consists of a rectangular PTC conductive composite material structural part with four unfilled corners and four triangular non-benign conductor material structural parts with the same structure, namely a first, a second, a third and a fourth, wherein the rectangular PTC conductive composite material structural part with the four unfilled corners and the triangular non-benign conductor material structural parts with the same structure are arranged on the same plane and have the same thickness, and the resistance of the rectangular PTC conductive composite material structural part is 25 ℃ at the ambient temperatureThe rate is 0.55 omega cm, the resistivities of the first, second, third and fourth triangular non-benign conductor material structural parts are all 1 multiplied by 108Ω.cm。
11. The pluggable PTC protector according to claim 6, wherein: the chip consists of two parts, namely a round non-benign conductor material structural part and a PTC conductive composite material structural part, wherein the round non-benign conductor material structural part and the PTC conductive composite material structural part are arranged on the same plane and have the same thickness, the round non-benign conductor material structural part is embedded in the round through holes of the middle PTC conductive composite material structural part and are tightly connected with each other, the resistivity of the PTC conductive composite material structural part is 0.88 omega at the ambient temperature of 25 ℃, and the resistivity of the round non-benign conductor material structural part is 1 multiplied by 1014Ω.cm。
12. The pluggable PTC protector according to claim 6, wherein: the chip consists of a square non-benign conductor material structural member and a PTC conductive composite material structural member, wherein the square non-benign conductor material structural member and the PTC conductive composite material structural member are arranged on the same plane and have the same thickness, the square non-benign conductor material structural member is embedded in the square through hole of the PTC conductive composite material structural member, the two parts are tightly attached, the resistivity of the PTC conductive composite material structural member is 0.18 omega at the ambient temperature of 25 ℃, and the resistivity of the rectangular non-benign conductor material structural member is 1 multiplied by 1010Ω.cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505146.5U CN213815692U (en) | 2020-11-03 | 2020-11-03 | Plug-in PTC protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505146.5U CN213815692U (en) | 2020-11-03 | 2020-11-03 | Plug-in PTC protector |
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| Publication Number | Publication Date |
|---|---|
| CN213815692U true CN213815692U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022505146.5U Active CN213815692U (en) | 2020-11-03 | 2020-11-03 | Plug-in PTC protector |
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|---|---|
| CN (1) | CN213815692U (en) |
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2020
- 2020-11-03 CN CN202022505146.5U patent/CN213815692U/en active Active
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Address after: Room 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Patentee after: Shanghai Weian Electronics Co.,Ltd. Address before: Room 806, 8th floor, 125 Liuying Road, Hongkou District, Shanghai 200083 Patentee before: Shanghai Wei'an Electronic Co.,Ltd. |
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