CN216804444U - Quick replacement device of 3D print platform - Google Patents
Quick replacement device of 3D print platform Download PDFInfo
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- CN216804444U CN216804444U CN202123331468.3U CN202123331468U CN216804444U CN 216804444 U CN216804444 U CN 216804444U CN 202123331468 U CN202123331468 U CN 202123331468U CN 216804444 U CN216804444 U CN 216804444U
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Abstract
The utility model discloses a quick replacement device of a 3D printing platform, which is arranged below a nozzle of a 3D printer and used for bearing a 3D printing product, and comprises a heat-conducting plate, a heating plate and a forming plate; the heat-conducting plate is provided with a clamping mechanism, and the clamping mechanism comprises a clamping block arranged on a first side edge of the heat-conducting plate and an elastic clamping stopper arranged on a second side edge of the heat-conducting plate opposite to the first side edge; the heating plate is fixed on the lower surface of the heat conducting plate; the outline of the forming plate is matched with a clamping mechanism on the upper surface of the heat-conducting plate; the molding plate is placed and clamped in the clamping mechanism; the elastic clamping stopper clamps or releases the forming plate through elastic extrusion. The utility model can quickly replace the forming platform, meet the requirements of different printing materials matching different forming platforms and improve the product quality and the production efficiency.
Description
Technical Field
The utility model relates to the field of 3D printing, in particular to a quick replacement device for a 3D printing platform.
Background
FDM (fused deposition modeling) is a technique of 3D printing, in which various wires (such as engineering plastics ABS, polycarbonate PC, etc.) are heated and melted, and a molding nozzle selectively coats a material on a work platform according to a cross-sectional profile of a preloaded map file, and the material is cooled and solidified to form a layer of cross section. And after the section of one layer is formed, the workbench descends by a certain height, then cladding of the next layer is carried out, the section outline is like to be 'drawn' layer by layer, and the steps are repeated, so that the three-dimensional product part is finally formed. The three-dimensional product is adhered to the working platform, and the forming spray head is arranged above the working platform, so that the finished product is not easy to take down.
Therefore, the printing material needs to have certain adhesive force on the platform, prevents to warp the limit in the printing process, needs to print again and takes off the product easily after accomplishing. Because the printing materials are various, the platform made of different materials can be replaced to adapt to different materials, certain adhesive force between the printing materials and the platform is guaranteed, and the product and the platform can be conveniently separated. Therefore, the platform structure capable of being replaced quickly is designed, the requirement for frequently replacing different platforms is met, the product quality is improved, and the production efficiency of products is not influenced.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a quick replacement device for a 3D printing platform, which can quickly replace a forming platform, meet the requirements of different printing materials matching different forming platforms, and improve the product quality and the production efficiency.
The technical solution of the utility model is as follows:
a quick replacement device for a 3D printing platform is arranged below a nozzle of a 3D printer and used for bearing a 3D printing product, and comprises a heat conducting plate, a heating plate and a forming plate;
the heat-conducting plate is provided with a clamping mechanism, and the clamping mechanism comprises a clamping block arranged on a first side edge of the heat-conducting plate and an elastic clamping stopper arranged on a second side edge of the heat-conducting plate opposite to the first side edge;
the heating plate is fixed on the lower surface of the heat conducting plate;
the outline of the forming plate is matched with a clamping mechanism on the upper surface of the heat conducting plate; the forming plate is placed and clamped in the clamping mechanism;
the elastic clamping stopper clamps or releases the forming plate through elastic extrusion.
As above 3D print platform's quick replacement device, wherein, chucking mechanism including set up in the stopper of the relative third side of heat-conducting plate and fourth side, the medial surface of stopper supports and props up the profiled sheeting side.
The quick replacement device for the 3D printing platform comprises an elastic clamping stopper, a pull rod pin and an elastic member;
the baffle plate is fixed on the second side edge of the heat-conducting plate, a through hole penetrating through the first side surface and the second side surface of the baffle plate is formed in the baffle plate, and an annular cavity is formed in one side, on the first side surface of the baffle plate, of the through hole;
the pull rod pin is inserted into the through hole; a pressing part is arranged at the first end of the pull rod pin, and the outer diameter of the pressing part is larger than that of the pull rod pin and smaller than the inner diameter of the annular cavity; the second end of the pull rod pin extends out of the second side face of the stop block;
the elastic piece is arranged in the annular cavity and sleeved on the pull rod pin; one end of the elastic piece abuts against the abutting portion, and the other end of the elastic piece abuts against the stop block.
The quick replacement device for the 3D printing platform is characterized in that the second end of the pull rod pin is provided with a pulling part, and the outer diameter of the pulling part is larger than that of the pull rod pin.
The quick replacement device for the 3D printing platform comprises a pressing part and a pressing end, wherein the pressing end of the pressing part is in a spherical arc shape.
As above, the top of the fixture block is provided with the counter hook portion, the lower surface of the counter hook portion is an inward inclined guide slope, and the bottom end of the guide slope is flush with the upper surface of the forming plate.
The quick replacement device for the 3D printing platform comprises a heat conducting plate, a limiting block and a quick replacement device, wherein the limiting block is arranged on the third side edge and the fourth side edge of the heat conducting plate respectively; the first side of heat-conducting plate is equipped with two at least fixture blocks.
The quick-change device for the 3D printing platform is described above, wherein the elastic member is a spring.
The quick change device of the 3D printing platform as described above, wherein the heating plate and the heat conductive plate are adhered together via high temperature glue.
As above 3D print platform's quick replacement device, wherein, be equipped with fixing hole on four angles of heat-conducting plate respectively, the hot plate corresponds fixing hole is equipped with dodges the oblique angle, the heat-conducting plate passes via locking screw fixing hole locks extremely on the base.
From the above description, it is known that the present invention can actually achieve the following effects compared with the prior art:
according to the quick replacement device for the 3D printing platform, the heat-conducting plate is provided with the clamping mechanism matched with the outline of the forming plate, so that the forming plate can be prevented from being clamped and clamped in the clamping mechanism, the clamping mechanism comprises the elastic clamping stopper arranged on one side edge of the heat-conducting plate, the elastic clamping stopper clamps or releases the forming plate through elastic extrusion, the forming plate made of different materials can be quickly replaced, the requirement that different printing materials are matched with different forming plates is met, a certain adhesive force is ensured to be formed between the printing materials and the forming plate, the product and the forming plate can be conveniently separated, and the product quality and the production efficiency are improved.
Drawings
Fig. 1 is a schematic diagram of a disassembled structure of a quick replacement device for a 3D printing platform according to a preferred embodiment of the present invention;
FIG. 2 is a schematic overall structure diagram of a quick change apparatus for a 3D printing platform according to a preferred embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a quick-change apparatus for a 3D printing platform according to a preferred embodiment of the present invention;
fig. 4 is a partially enlarged structural view of the parts a and B in fig. 3 according to the present invention.
Main element number description:
the utility model comprises the following steps:
1: heat-conducting plate 2: heating plate 3: molding plate
4: the latch 41: the reverse hook portion 411: guide slope
5: elastic snap stopper 51: the stopper 511: annular cavity
52: a tie rod pin 521: the pressing portion 522: pulling part
53: the elastic member 6: limiting block
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The utility model provides a quick replacement device for a 3D printing platform, which can quickly replace a forming platform, meet the requirements of matching different printing materials with different forming platforms, and improve the product quality and the production efficiency. In a preferred embodiment of the quick replacement device for a 3D printing platform of the present invention, please refer to fig. 1 to 2, which are schematic structural views of the preferred embodiment of the quick replacement device for a 3D printing platform of the present invention, the quick replacement device is disposed below a nozzle of a 3D printer, and is used for bearing a 3D printing product, and the quick replacement device comprises a heat conducting plate 1, a heating plate 2 and a forming plate 3; the heat conduction plate 1 is provided with a clamping mechanism, and the clamping mechanism comprises a clamping block 4 arranged on a first side edge of the heat conduction plate 1 and an elastic clamping stopper 5 arranged on a second side edge, opposite to the first side edge, of the heat conduction plate 1; the heating plate 2 is fixed on the lower surface of the heat conducting plate 1; the outline of the forming plate 3 is matched with a clamping mechanism on the upper surface of the heat conducting plate 1; the forming plate 3 is placed and clamped in the clamping mechanism; the elastic clamping stop member 5 clamps or releases the forming plate 3 through elastic pressing. As shown in fig. 1 and 2, in the quick replacement device for a 3D printing platform of the present invention, a heating plate 2 is fixed on the lower surface of a heat conducting plate 1, a clamping mechanism is arranged on the heat conducting plate 1, and a forming plate 3 is clamped on the upper surface of the heat conducting plate 1 by the clamping mechanism; wherein, chucking mechanism keeps off 5 including setting up in the fixture block 4 of 1 first side of heat-conducting plate and the elasticity chucking that sets up the second side relative with first side on heat-conducting plate 1, and the profile of profiled sheeting 3 cooperatees with the chucking mechanism of 1 upper surface of heat-conducting plate, ensure that chucking mechanism can block profiled sheeting 3, fixture block 4 has blocked the side of profiled sheeting 3, elasticity chucking keeps off 5 can the other side of chucking profiled sheeting 3, and elasticity chucking keeps off 5 via elasticity extrusion chucking or relieve profiled sheeting 3, the rapid profiled sheeting 3 of changing different materials has been realized, the demand to the different profiled sheeting 3 of different printing material cooperation has been reached, guarantee to have certain adhesive force between printing material and the profiled sheeting 3, and also be convenient for part product and profiled sheeting 3, improve product quality and production efficiency.
In the above fast replacing device for the 3D printing platform according to the preferred embodiment of the present invention, the clamping mechanism includes the limiting blocks 6 disposed on the third side and the fourth side of the heat conducting plate 1, which are opposite to each other, and the inner side of the limiting block 6 abuts against the side of the forming plate 3. As shown in fig. 1 and 2, the heat conducting plate 1 is abutted against and limited by the limited blocks 6 on the third side and the fourth side opposite to each other, so that the possibility of accidental sliding caused by collision of the forming plate 3 is reduced, and the reliability of the forming plate 3 is improved.
In the above-mentioned fast replacing device for 3D printing platform according to the present invention, in the preferred embodiment of the utility model, the resilient clamping stopper 5 includes a stopper 51, a pull rod pin 52 and a resilient member 53; the baffle 51 is fixed on the second side edge of the heat conducting plate 1, a through hole penetrating through the first side surface and the second side surface of the baffle 51 is formed in the baffle 51, and an annular cavity 511 is formed in one side of the first side surface of the baffle 51 through the through hole; the pull rod pin 52 is inserted into the through hole; a pressing part 521 is arranged at a first end of the pull rod pin 52, and the outer diameter of the pressing part 521 is larger than that of the pull rod pin 52 and smaller than the inner diameter of the annular cavity 511; a second end of the pull rod pin 52 extends beyond a second side of the stopper 51; the elastic member 53 is installed in the annular cavity 511 and sleeved on the pull rod pin 52; one end of the elastic member 53 abuts against the abutting portion 521, and the other end abuts against the stopper 51. As shown in fig. 3 and 4, the elastic clamping stopper 5 of the present invention includes a stopper 51, a pull rod pin 52 and an elastic member 53, wherein the stopper 51 is disposed at a second side edge of the heat shield, an annular cavity 511 is disposed at an inner side of a through hole of the stopper, the pull rod pin 52 is inserted into the through hole, a pressing portion 521 disposed at a first end of the pull rod pin 52 is capable of moving in the annular cavity 511, a second end of the pull rod pin 52 extends beyond the through hole, and two ends of the elastic member 53 sleeved on the pull rod pin 52 respectively press against the pressing portion 521 and the stopper 51; when the forming plate 3 is placed on the heat conducting plate 1, the second end of the pull rod pin 52 is pulled, the pressing part 52 extrudes the elastic part 53 to move backwards, the pressing end of the pressing part 52 exits from the edge of the heat conducting plate 1 or beyond, after the forming plate 3 is placed on the heat conducting plate 1, the pull rod pin 52 is released, the elastic part 53 rebounds, the pressing part 521 extends out and protrudes to the upper surface of the forming plate 3, and the effect of clamping and fixing the forming plate 3 is achieved; when the forming plate 3 is to be replaced, only the pull rod pin 52 needs to be pulled, the original forming plate 3 is taken out, the pull rod pin 52 is loosened after the replaced forming plate 3 is placed, the forming plate 3 can be clamped and fixed again, the process of replacing the forming plate 3 is completed, the operation is simple and convenient, the step of replacing the forming plate 3 is greatly simplified, the replacement time is saved, and the production efficiency is improved. Of course, the elastic clamping stop member 5 can be other types of elastic clamping structures.
In the above-mentioned quick-change device for a 3D printing platform according to the present invention, in a preferred embodiment of the quick-change device, the second end of the pull rod pin 52 is provided with a pulling portion 522, and the outer diameter of the pulling portion 522 is larger than the outer diameter of the pull rod pin 52. As shown in fig. 4, the pulling portion 522 is disposed at the second end of the pull rod pin 52, and the outer diameter of the pulling portion is larger than that of the pull rod pin 52, so that the pull rod pin 52 is thin, and is inconvenient to pull by hand and easy to slide.
In the above-mentioned quick replacing device for a 3D printing platform according to the present invention, in a preferred embodiment of the quick replacing device, the pressing end of the pressing portion 521 is set to be a spherical arc. As shown in fig. 4, the end of the pressing portion 521 of the present invention is configured as a spherical arc, and the edge of the forming plate 3 contacts with the arc surface of the pressing end by slightly pulling the pull rod pin 52, so that the pressing portion is easy to be taken out.
In the above fast replacing device for 3D printing platform according to the present invention, in the preferred embodiment of the fast replacing device, the top of the fixture block 4 is provided with the counter hook portion 41, the lower surface of the counter hook portion 41 is the inward inclined guiding inclined surface 411, and the bottom end of the guiding inclined surface 411 is flush with the upper surface of the forming plate 3. As shown in fig. 4, the top of the fixture block 4 of the present invention is provided with a counter-hook portion 41 extending to the upper surface of the forming plate 3, which has a downward pressing effect on the forming plate 3, so as to prevent the forming plate 3 from being lifted by a product when the 3D printed product is taken out, thereby causing the position deviation of the forming plate 3; further, the lower surface of the counter hook 41 is provided with an inward inclined guide slope 411, and the bottom end of the guide slope 411 is flush with the upper surface of the forming plate 3, so that when the pull rod pin 52 is pulled to take out the forming plate 3, the edge of the forming plate 3 can slide obliquely upwards along the guide slope 411, thereby facilitating the taking out of the forming plate 3.
In the above quick replacing device for the 3D printing platform according to the present invention, in a preferred embodiment of the quick replacing device, the third side and the fourth side of the heat conducting plate 1 are respectively provided with at least two limiting blocks 6; the first side of heat-conducting plate 1 is equipped with two at least fixture blocks 4. As shown in fig. 2, the third side and the fourth side of the heat conducting plate can be provided with a plurality of limiting blocks 6, and the first side of the heat conducting plate 1 can also be provided with a plurality of clamping blocks 4, so that the heat conducting plate can be better clamped on the forming plate 3 when the forming plate 3 has a larger size, and the position deviation of the forming plate 3 can be prevented.
In the above-mentioned fast replacing apparatus for 3D printing platform according to the present invention, in the preferred embodiment, the elastic member 53 is a spring. Of course, other elastic members 53 are possible as long as the requirement of elasticity is met.
In the above-mentioned fast replacing device for 3D printing platform according to the present invention, in the preferred embodiment, the heating plate 2 and the heat conducting plate 1 are adhered together by high temperature glue. The utility model adopts high-temperature glue to bond the heating plate 2 and the heat conducting plate 1, and has simple structure and firm bonding.
In the above-mentioned fast replacing device for 3D printing platform according to the present invention, in a preferred embodiment, the four corners of the heat conducting plate 1 are respectively provided with a fixing through hole, the heating plate 2 is provided with an avoiding oblique angle corresponding to the fixing through hole, and the heat conducting plate 1 is locked to the base of the printer by passing through the fixing through hole through a locking screw. As shown in fig. 1, the heat conducting plate 1 of the present invention is locked to the base by the locking bolts passing through the fixing through holes at the four corners of the heat conducting plate 1, and the heating plate 2 is provided with an avoiding oblique angle corresponding to the fixing through holes.
Referring to fig. 1 to 4, the fast replacing apparatus for 3D printing platform according to the present invention will now be described with reference to the above preferred embodiment, and the working process and principle thereof are specifically as follows:
according to the quick replacement device for the 3D printing platform, the heating plate 2 is fixed on the lower surface of the heat conduction plate 1, the clamping mechanism is arranged on the heat conduction plate 1, and the forming plate 3 is clamped on the upper surface of the heat conduction plate 1 through the clamping mechanism; wherein, chucking mechanism keeps off 5 including setting up in the fixture block 4 of 1 first side of heat-conducting plate and the elasticity chucking that sets up the second side relative with first side on heat-conducting plate 1, and the profile of profiled sheeting 3 cooperatees with the chucking mechanism of 1 upper surface of heat-conducting plate, ensure that chucking mechanism can block profiled sheeting 3, fixture block 4 has blocked the side of profiled sheeting 3, elasticity chucking keeps off 5 can the other side of chucking profiled sheeting 3, and elasticity chucking keeps off 5 via elasticity extrusion chucking or relieve profiled sheeting 3, the rapid profiled sheeting 3 of changing different materials has been realized, the demand to the different profiled sheeting 3 of different printing material cooperation has been reached, guarantee to have certain adhesive force between printing material and the profiled sheeting 3, and also be convenient for part product and profiled sheeting 3, improve product quality and production efficiency. In a further embodiment, the limiting blocks 6 on the third side and the fourth side opposite to the heat conducting plate 1 are used for abutting against and limiting the other two sides of the forming plate 3, so that the possibility that the forming plate 3 is collided and accidentally slides is reduced, and the reliability of the forming plate 3 is improved. In a further embodiment, the elastic clamping stopper 5 of the present invention includes a stopper 51, a pull rod pin 52 and an elastic member 53, wherein the stopper 51 is disposed at the second side edge of the heat shield, an annular cavity 511 is disposed at the inner side of the through hole of the stopper, the pull rod pin 52 is inserted into the through hole, a pressing portion 521 disposed at the first end of the pull rod pin 52 is capable of moving in the annular cavity 511, the second end of the pull rod pin 52 extends beyond the through hole, and two ends of the elastic member 53 sleeved on the pull rod pin 52 respectively press against the pressing portion 521 and the stopper 51; when the forming plate 3 is placed on the heat conducting plate 1, the second end of the pull rod pin 52 is pulled, the pressing part 52 extrudes the elastic part 53 to move backwards, the pressing end of the pressing part 52 exits from the edge of the heat conducting plate 1 or beyond, after the forming plate 3 is placed on the heat conducting plate 1, the pull rod pin 52 is released, the elastic part 53 rebounds, the pressing part 521 extends out and protrudes to the upper surface of the forming plate 3, and the effect of clamping and fixing the forming plate 3 is achieved; when the forming plate 3 is to be replaced, only the pull rod pin 52 needs to be pulled, the original forming plate 3 is taken out, the pull rod pin 52 is loosened after the replaced forming plate 3 is placed, the forming plate 3 can be clamped and fixed again, the process of replacing the forming plate 3 is completed, the operation is simple and convenient, the step of replacing the forming plate 3 is greatly simplified, the replacement time is saved, and the production efficiency is improved. Of course, the elastic clamping stop member 5 can be other types of elastic clamping structures.
According to the quick replacement device for the 3D printing platform, the heat conduction plate 1 is provided with the clamping mechanism matched with the outline of the forming plate 3, so that the forming plate 3 can be prevented from being clamped and clamped in the clamping mechanism, the clamping mechanism comprises the elastic clamping stopper 5 arranged on one side edge of the heat conduction plate 1, the elastic clamping stopper 5 clamps or releases the forming plate 3 through elastic extrusion, the forming plate 3 made of different materials can be quickly replaced, the requirement that different printing materials are matched with different forming plates 3 is met, a certain adhesive force is ensured to be formed between the printing materials and the forming plate 3, the product and the forming plate 3 can be conveniently separated, and the product quality and the production efficiency are improved.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.
Claims (10)
1. A quick replacement device for a 3D printing platform is characterized in that the quick replacement device is arranged below a nozzle of a 3D printer and used for bearing a 3D printing product, and comprises a heat conducting plate, a heating plate and a forming plate;
the heat-conducting plate is provided with a clamping mechanism, and the clamping mechanism comprises a clamping block arranged on a first side edge of the heat-conducting plate and an elastic clamping stopper arranged on a second side edge of the heat-conducting plate opposite to the first side edge;
the heating plate is fixed on the lower surface of the heat conducting plate;
the outline of the forming plate is matched with a clamping mechanism on the upper surface of the heat conducting plate; the forming plate is placed and clamped in the clamping mechanism;
the elastic clamping stopper clamps or releases the forming plate through elastic extrusion.
2. The quick replacing device for the 3D printing platform according to claim 1, wherein the clamping mechanism comprises a limiting block arranged on a third side and a fourth side of the heat conducting plate opposite to each other, and the inner side of the limiting block abuts against the side of the forming plate.
3. The quick-change device for 3D printing platforms according to claim 2, wherein the resilient clamping stopper comprises a stopper, a pull rod pin and a resilient member;
the baffle plate is fixed on the second side edge of the heat-conducting plate, a through hole penetrating through the first side surface and the second side surface of the baffle plate is formed in the baffle plate, and an annular cavity is formed in one side, on the first side surface of the baffle plate, of the through hole;
the pull rod pin is inserted into the through hole; a pressing part is arranged at the first end of the pull rod pin, and the outer diameter of the pressing part is larger than that of the pull rod pin and smaller than the inner diameter of the annular cavity; the second end of the pull rod pin extends out of the second side face of the stop block;
the elastic piece is arranged in the annular cavity and sleeved on the pull rod pin; one end of the elastic piece abuts against the abutting portion, and the other end of the elastic piece abuts against the stop block.
4. The quick change device for 3D printing platforms as recited in claim 3 wherein the second end of the pull rod pin is provided with a pulling portion having an outer diameter greater than the outer diameter of the pull rod pin.
5. The quick-change device for the 3D printing platform as claimed in claim 4, wherein the pressing end of the pressing portion is arranged in a spherical arc shape.
6. The device for rapidly replacing a 3D printing platform according to claim 5, wherein the top of the clamping block is provided with an anti-hook part, the lower surface of the anti-hook part is an inward inclined guide slope, and the bottom end of the guide slope is flush with the upper surface of the forming plate.
7. The quick-change device for the 3D printing platform according to claim 6, wherein the third side and the fourth side of the heat-conducting plate are respectively provided with at least two limiting blocks; the first side of heat-conducting plate is equipped with two at least fixture blocks.
8. The quick change device for a 3D printing platform according to claim 7, wherein the elastic member is a spring.
9. The quick change device of 3D printing platform according to any of claims 1 to 8, characterized in that the heating plate and the heat conducting plate are glued together via high temperature glue.
10. The quick replacing device for 3D printing platform according to claim 9, wherein the heat conducting plate has fixing through holes at four corners, the heating plate has an avoiding bevel corresponding to the fixing through holes, and the heat conducting plate is locked to the base by locking screws passing through the fixing through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331468.3U CN216804444U (en) | 2021-12-28 | 2021-12-28 | Quick replacement device of 3D print platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123331468.3U CN216804444U (en) | 2021-12-28 | 2021-12-28 | Quick replacement device of 3D print platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216804444U true CN216804444U (en) | 2022-06-24 |
Family
ID=82055962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123331468.3U Active CN216804444U (en) | 2021-12-28 | 2021-12-28 | Quick replacement device of 3D print platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216804444U (en) |
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2021
- 2021-12-28 CN CN202123331468.3U patent/CN216804444U/en active Active
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