CN221437064U - Injection mold capable of removing back-off - Google Patents
Injection mold capable of removing back-off Download PDFInfo
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- CN221437064U CN221437064U CN202320301635.XU CN202320301635U CN221437064U CN 221437064 U CN221437064 U CN 221437064U CN 202320301635 U CN202320301635 U CN 202320301635U CN 221437064 U CN221437064 U CN 221437064U
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- 238000002347 injection Methods 0.000 title claims abstract description 70
- 239000007924 injection Substances 0.000 title claims abstract description 70
- 238000000465 moulding Methods 0.000 claims abstract description 127
- 230000000903 blocking effect Effects 0.000 claims description 51
- 238000001746 injection moulding Methods 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 239000012778 molding material Substances 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 2
- 230000007246 mechanism Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The application discloses a removable back-off injection mold which is used for producing at least one product, wherein the removable back-off injection mold forms at least one forming cavity, an injection runner and an injection port, wherein the injection runner and the injection port are communicated with the forming cavity, and the removable back-off injection mold comprises a mold body, a mounting piece and at least one forming assembly. Each molding assembly comprises a first molding piece and a second molding piece, the mold body comprises an upper mold and a lower mold, the upper mold can be arranged above the lower mold in a vertically covered manner, a mounting channel, a mounting space, at least one first channel and at least one second channel which are communicated with the mounting space are formed between the upper mold and the lower mold, and the first channel extends between the mounting channel and the mounting space. The mounting piece comprises a mounting part, and the mounting piece can be close to or far away from the lower die along the moving direction of the upper die.
Description
Technical Field
The utility model relates to an injection mold, in particular to an injection mold with a detachable back-off function.
Background
The back-off is a structural part of a reverse-wrapping mold where many plastic articles exist. Due to the existence of the back-off structure, the plastic products cannot be smoothly demoulded in one direction directly after injection molding.
In order to facilitate smooth demolding of plastic products with a back-off structure, an ejection mechanism and a linkage mechanism are arranged on the existing part of the mold. When the injection mold is opened, the upper mold drives the ejection mechanism to synchronously move by virtue of the linkage structure, and the ejection mechanism utilizes the inclined wedge principle to help the inverted buckle structure of the product to be separated from the mold. These ejection mechanisms and linkage mechanisms can increase the weight of the mold, so that the production cost of plastic products with the back-off structure can be increased, and in addition, the structure of the mold can be more complicated, which is not beneficial to subsequent maintenance.
Disclosure of utility model
The utility model has the advantages that the plastic product with the back-off structure can be separated from the mold without an ejection structure, and the structure of the mold can be simplified while the plastic product with the back-off structure is ensured to be normally demolded, so that the utility model is convenient for subsequent maintenance.
To achieve at least one of the above advantages, the present utility model provides a removable back-off injection mold for producing at least one product, the removable back-off injection mold forming at least one molding cavity, an injection runner in communication with the molding cavity, and an injection port in communication with the injection runner, the removable back-off injection mold comprising:
The die body comprises an upper die and a lower die, the upper die can be vertically arranged above the lower die in a covering manner, a mounting channel, a mounting space, at least one first channel and at least one second channel which is communicated with the mounting space are formed between the upper die and the lower die by the die body, and the first channel extends between the mounting channel and the mounting space;
The mounting piece comprises a mounting part, and the mounting piece can be close to or far away from the lower die along the moving direction of the upper die;
At least one molding assembly, each molding assembly comprises a first molding piece and a second molding piece, the first molding piece is mounted on the mounting part along a horizontal plane perpendicular to the moving direction of the mounting piece, the axial direction of the first molding piece is perpendicular to the axial direction of the mounting channel, and the second molding piece is rotatably mounted on the lower die;
After the injection mold capable of removing the back-off is closed, the axial direction of the first molding part is intersected with the axial direction of the second molding part, the axial direction of the second molding part is perpendicular to the moving direction of the mounting part, the mounting part is mounted in the mounting channel, the mounting part drives the first molding part to extend into the mounting space through the first channel part and to be suspended in the mounting space, the second molding part extends into the mounting space through the second channel part and is suspended in the mounting space, and the second molding part, the first molding part and the mold body jointly form the molding cavity.
According to an embodiment of the utility model, the mounting member further comprises at least one handling portion mounted at an end of the mounting portion and protruding out of the mounting channel.
According to an embodiment of the present utility model, the lower mold includes a lower mold body and at least one connecting shaft, the connecting shaft is mounted on the lower mold body, an axial direction of the connecting shaft is perpendicular to an axial direction of the second molding member, and the second molding member is rotatably mounted on the connecting shaft.
According to an embodiment of the present utility model, the lower mold includes a lower mold body and at least one connecting shaft, the connecting shaft is mounted on the lower mold body, an axial direction of the connecting shaft is perpendicular to an axial direction of the second molding member, the second molding member is fixedly mounted on the connecting shaft, and the connecting shaft is rotatably mounted on the lower mold body.
According to an embodiment of the present utility model, the first molding member has a first blocking portion and a first molding portion, the first blocking portion is mounted on the mounting portion on a horizontal plane perpendicular to a moving direction of the mounting member, one end of the first blocking portion, which is far away from the mounting portion, extends axially to form the first molding portion, the size of the first blocking portion is adapted to the size of the first channel, and the position of the first blocking portion corresponds to the size of the first channel, after the injection mold capable of disengaging and reversing is closed, the mounting portion drives the first molding portion to suspend in the mounting space through the first blocking portion, and the first blocking portion blocks the first channel, and is used for preventing injection molding material from overflowing the molding cavity.
According to an embodiment of the present utility model, the second molding member has a second blocking portion and a second molding portion, the second blocking portion is rotatably mounted on the lower mold, and an end portion of the second blocking portion away from the lower mold extends axially to form the second molding portion, the size of the second blocking portion is adapted to the size of the second channel, and the second blocking portion corresponds to the size of the second channel, after the mold is closed by the injection mold capable of removing the back-off, the second blocking portion drives the second molding portion to suspend in the mounting space, the second blocking portion blocks the second channel, and the second blocking portion is used for preventing the injection molding material from overflowing the molding cavity.
According to an embodiment of the present utility model, each of the second molding pieces further has at least one stop portion, wherein the stop portion is formed by extending the second blocking portion toward one side of the lower mold perpendicularly to the axial direction of the second molding piece, and after the mold is closed, an end portion of the stop portion away from the second blocking portion abuts against a surface of the lower mold toward one side of the upper mold.
According to an embodiment of the utility model, the center of gravity of the second molding member is biased toward an end of the second molding member away from the connecting shaft.
According to an embodiment of the present utility model, the injection mold with the detachable back-off further includes at least one guiding structure, the guiding structure includes a guiding member and an inserting channel, the guiding member is mounted on the lower mold, the inserting channel is formed at a position corresponding to the mounting portion and the guiding member, and the guiding member is movably inserted into the inserting channel formed by the mounting portion.
According to an embodiment of the present utility model, the injection mold with the detachable back-off further includes at least one guiding structure, the guiding structure includes a guiding member and an inserting channel, the guiding member is mounted on the upper mold, the inserting channel is formed at a position corresponding to the mounting portion and the guiding member, and the guiding member is movably inserted into the inserting channel formed by the mounting portion.
Drawings
Fig. 1 shows a schematic structural diagram of the product according to the utility model.
Fig. 2 shows a schematic structural view of the injection mold with the back-off in one state.
Fig. 3 shows a schematic structural view of the injection mold with the back-off being removed in another state.
Fig. 4 shows a schematic view of a part of the injection mold of the releasable back-off in the state of fig. 2.
Fig. 5 shows a schematic view of a part of the injection mold of the releasable back-off in the state of fig. 3.
Fig. 6 shows a cross-sectional view of the releasable back-off injection mold of fig. 2 at an angle.
FIG. 7 shows a cross-sectional view of a portion of the structure of the injection mold of the releasable back-off of the present utility model.
Fig. 8 shows a schematic structural view of the lower die of the present utility model.
Fig. 9 shows a schematic connection of the connecting shaft and the second molded part according to the utility model.
Fig. 10 shows a cross-sectional view of the releasable back-off injection mold of fig. 2 at another angle.
Fig. 11 shows a cross-sectional view of the releasable back-off injection mold at a further angle.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 1, a releasable injection mold for producing at least one product 90 and normally separable from the product 90 according to a preferred embodiment of the present utility model will be described in detail below. The product 90 defines a main passage 9001 and at least one back-off passage 9002, wherein an axis of the main passage 9001 intersects an axis of the back-off passage 9002.
Referring to fig. 6, the injection mold capable of removing the back-off forms at least one molding cavity 10001. The injection mold capable of removing the back-off comprises a mold body 10, a mounting piece 20 and at least one molding assembly 30.
Referring to fig. 7, in detail, the mold body 10 includes an upper mold 11 and a lower mold 12, and the upper mold 11 is vertically disposed above the lower mold 12 in a covering manner. The mold body 10 forms a mounting channel 1001, a mounting space 1002, at least one first channel 1003, and at least one second channel 1004 communicating with the mounting space 1002 between the upper mold 11 and the lower mold 12. The first passage 1003 extends between the mounting passage 1001 and the mounting space 1002.
Referring to fig. 3 and 5, the mounting member 20 includes a mounting portion 21, the mounting member 20 may be moved toward or away from the lower die 12 in the moving direction of the upper die 11, and the mounting portion 21 is mounted to the mounting passage 1001 after the releasable back-off injection die is closed.
Preferably, the mounting member 20 further includes at least one manipulation portion 22, and the manipulation portion 22 is mounted at an end of the mounting portion 21 and extends out of the mounting channel 1001 to provide a position for a user to manipulate the mounting member 20 toward or away from the lower die 12.
Referring to fig. 2 to 5, each of the molding assemblies 30 includes a first molding member 31 and a second molding member 32. The first molding member 31 mounts the mounting portion 21 on a horizontal plane perpendicular to the moving direction of the mounting member 20, and the axial direction of the first molding member 31 is perpendicular to the axial direction of the mounting passage 1001. The second molding member 32 is rotatably mounted to the lower die 12. After the mold is closed, the axial direction of the first molding member 31 intersects the axial direction of the second molding member 32, and the axial direction of the second molding member 32 is perpendicular to the moving direction of the mounting member 20.
After the detachable back-off injection mold is closed, the mounting portion 21 is mounted on the mounting channel 1001, and the mounting portion 21 drives the first molding member 31 to extend into the mounting space 1002 through the first channel 1003, and suspends the mounting space 1002, so that the product 90 after injection molding forms the main channel 9001. The second molding member 32 extends into the installation space 1002 through the second passage 1004 and is suspended in the installation space 1002, so that the injection molded product 90 forms the undercut passage 9002. The second molding member 32, the first molding member 31, and the mold body 10 together form the molding cavity 10001.
Referring to fig. 6 and 11, it is worth mentioning that the injection mold with the back-off function forms an injection runner 10002 that communicates with the molding cavity 10001. The injection mold capable of removing the back-off forms an injection port 10003 on the upper mold 11. The injection molding runner 10002 extends between the injection molding opening 10003 and the molding cavity 10001.
In this way, after the mold is closed, an injection material is injected into the molding cavity 10001 through the injection port 10003 via the injection runner 10002 to form the product 90. After injection molding is completed, the upper mold 11 is vertically moved away from the lower mold 12 to expose a portion of the product 90. The mounting member 20 is then manipulated to drive the first molding member 31 and the molded product 90 vertically away from the lower mold 12, so that the product 90 moving upward applies a pulling force to the second molding member 32 mounted on the lower mold 12, and the second molding member 32 rotates from bottom to top, and the second molding member 32 is separated from the undercut channel 9002 formed by the product 90. Finally, the product 90 is blown in the axial direction of the first molding member 31, so that the worker releases the product 90 from the first molding member 31. It will be appreciated that, during the demolding process of the product 90, the second molding member 32 moves along with the mounting member 20 and the first molding member 31, and naturally disengages from the product 90, without using other ejection structures, so that the demolding process of the product 90 is simpler and faster, and the structure of the injection mold capable of removing the back-off is simpler.
Referring to fig. 8 to 9, in detail, the lower die 12 includes a lower die body 121 and at least one connection shaft 122, and the connection shaft 122 is mounted to the lower die body 121. The axial direction of the connecting shaft 122 is perpendicular to the axial direction of the second molding member 32. The second molding member 32 is mounted at one end portion thereof to the connection shaft 122 such that the second molding member 32 is rotatably connected to the lower die body 121 through the connection shaft 122.
In one implementation, the second molding member 32 is rotatably mounted to the connecting shaft 122.
As a modification of the above embodiment, the second molding member 32 is fixedly mounted to the connecting shaft 122, and the connecting shaft 122 is rotatably mounted to the lower die body 121.
Referring to fig. 6, the first molding member 31 preferably has a first blocking portion 311 and a first molding portion 312. The first blocking portion 311 is mounted on the mounting portion 21 on a horizontal plane perpendicular to the moving direction of the mounting member 20, and one end of the first blocking portion 311 away from the mounting portion 21 extends axially to form the first molding portion 312. The size of the first blocking portion 311 is adapted to the size of the first passage 1003, and the position thereof corresponds to the size thereof. After the injection mold capable of removing the back-off is closed, the mounting portion 21 drives the first forming portion 312 to be suspended in the mounting space 1002 through the first blocking portion 311, the first blocking portion 311 blocks the first channel 1003, and the first blocking portion 311 is used for preventing injection molding material from overflowing the forming cavity 10001.
Referring to fig. 9, it is also preferable that the second molding member 32 has a second blocking portion 321 and a second molding portion 322. The second blocking portion 321 is rotatably mounted to the lower die 12, and an end portion of the second blocking portion 321 remote from the lower die 12 extends axially to form the second molding portion 322. The second blocking portion 321 is matched to the second channel 1004 in size and position. After the injection mold capable of removing the back-off is closed, the second blocking portion 321 drives the second forming portion 322 to hang in the installation space 1002, the second blocking portion 321 blocks the second channel 1004, and the second blocking portion 321 is used for preventing injection molding materials from overflowing the forming cavity 10001, so that the injection mold capable of removing the back-off forms a sealing structure with the forming cavity 10001.
It should be noted that each of the second molding members 32 further has at least one stop portion 323, and the stop portion 323 is formed by extending the second blocking portion 321 toward one side of the lower die 12 perpendicular to the axial direction of the second molding portion 322. After the injection mold capable of releasing the back-off is closed, an end portion of the stop portion 323 away from the second blocking portion 321 abuts against a surface of the lower mold 12 facing the upper mold 11, so as to define a rotation angle of the second molding member 32.
As a preferred embodiment, the center of gravity of the second molding member 32 is biased toward an end of the second molding member 32 away from the connecting shaft 122. After the mounting member 20 drives the product 90 away from the lower die 12 by the first molding member 31, the second molding member 32 is rotated from bottom to top by the force of the product 90 to disengage from the undercut channel 9002 formed by the product 90. After the product 90 and the second molding member 32 are separated, the second molding member 32 rotates from top to bottom under the action of gravity, and is turned to the end portion of the stop portion 323 away from the second blocking portion 321 to abut against the upper surface of the lower mold 12 facing the upper mold 11, so as to achieve the reset.
Referring to fig. 10, further, the injection mold of the releasable back-off further includes at least one guiding structure 40. The guide structure 40 is disposed between the mold body 10 and the mounting portion 21, so that the mounting portion 21 moves along the extending direction of the guide structure 40.
Specifically, the guide structure 40 includes a guide 41 and an insertion channel 42. The guide 41 is movably inserted in the insertion passage 42.
In an embodiment, the guide 41 is mounted on the lower die 12, and the mounting portion 21 and the guide 41 form the insertion channel 42 at a corresponding position. The guide 41 is movably inserted into the insertion passage 42 formed in the mounting portion 21.
As a modification of the previous embodiment, the guide 41 is mounted on the upper die 11, and the mounting portion 21 and the guide 41 form the insertion passage 42 at the corresponding position. The guide 41 is movably mounted to the insertion passage 42 formed in the mounting portion 21.
The utility model also provides a working method of the injection mold capable of removing the back-off, which comprises the following steps:
(A) The mounting member 20 drives the first molding member 31 to approach the lower die 12, so that the mounting portion 21 is at least partially mounted on a portion of the mounting channel 1001 formed by the lower die 12, and the first molding member 31 is at least partially suspended in a portion of the mounting space 1002 formed by the lower die 12;
(B) The upper die 11 is covered on the lower die 12, and injection molding material is injected into the molding cavity 10001 through the injection molding opening 10003 and the injection molding runner 10002 to form the product 90;
(C) After injection molding, the upper die 11 is moved in a direction away from the lower die 12;
(D) The mounting member 20 drives the first molding member 31 to move away from the lower die 12, the first molding member 31 drives the product 90 to move upwards, and the second molding member 32 is driven to move away from the lower die 12, so that the product 90 is separated from the second molding member 32;
(E) Air is blown in the axial direction of the first molding member 31 to separate the product 90 from the first molding member 31.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. The utility model provides a but take off injection mold of back-off for at least one product of production, its characterized in that, but take off injection mold of back-off forms at least shaping chamber, with an injection runner of shaping chamber intercommunication and with an injection port of injection runner intercommunication, but take off injection mold of back-off includes:
The die body comprises an upper die and a lower die, the upper die can be vertically arranged above the lower die in a covering manner, a mounting channel, a mounting space, at least one first channel and at least one second channel which is communicated with the mounting space are formed between the upper die and the lower die by the die body, and the first channel extends between the mounting channel and the mounting space;
The mounting piece comprises a mounting part, and the mounting piece can be close to or far away from the lower die along the moving direction of the upper die;
At least one molding assembly, each molding assembly comprises a first molding piece and a second molding piece, the first molding piece is mounted on the mounting part along a horizontal plane perpendicular to the moving direction of the mounting piece, the axial direction of the first molding piece is perpendicular to the axial direction of the mounting channel, and the second molding piece is rotatably mounted on the lower die;
After the injection mold capable of removing the back-off is closed, the axial direction of the first molding part is intersected with the axial direction of the second molding part, the axial direction of the second molding part is perpendicular to the moving direction of the mounting part, the mounting part is mounted in the mounting channel, the mounting part drives the first molding part to extend into the mounting space through the first channel part and to be suspended in the mounting space, the second molding part extends into the mounting space through the second channel part and is suspended in the mounting space, and the second molding part, the first molding part and the mold body jointly form the molding cavity.
2. The injection mold of claim 1, wherein the mounting member further comprises at least one handling portion mounted to an end of the mounting portion and extending out of the mounting channel.
3. The injection mold of claim 2, wherein the lower mold comprises a lower mold body and at least one connecting shaft, the connecting shaft is mounted on the lower mold body, the axial direction of the connecting shaft is perpendicular to the axial direction of the second molding member, and the second molding member is rotatably mounted on the connecting shaft.
4. The injection mold of claim 2, wherein the lower mold comprises a lower mold body and at least one connecting shaft, the connecting shaft is mounted on the lower mold body, the axial direction of the connecting shaft is perpendicular to the axial direction of the second molding member, the second molding member is fixedly mounted on the connecting shaft, and the connecting shaft is rotatably mounted on the lower mold body.
5. The injection mold of claim 3 or 4, wherein the first molding member has a first blocking portion and a first molding portion, the first blocking portion is mounted on the mounting portion on a horizontal plane perpendicular to a moving direction of the mounting member, one end of the first blocking portion away from the mounting portion extends axially to form the first molding portion, a size of the first blocking portion is adapted to a size of the first channel, and the position of the first blocking portion corresponds to a size of the first channel, after the injection mold of the removable back-off mold is closed, the mounting portion drives the first molding portion to be suspended in the mounting space through the first blocking portion, and the first blocking portion blocks the first channel, and is used for preventing injection molding material from overflowing the molding cavity.
6. The injection mold of claim 5, wherein the second molding member has a second blocking portion and a second molding portion, the second blocking portion is rotatably mounted on the lower mold, and an end portion of the second blocking portion away from the lower mold extends axially to form the second molding portion, the size of the second blocking portion is adapted to the size of the second channel, and the position of the second blocking portion corresponds to the size of the second channel, after the injection mold of the removable back-off mold is closed, the second blocking portion drives the second molding portion to suspend in the mounting space, and the second blocking portion blocks the second channel, and the second blocking portion is used for preventing the injection molding material from overflowing the molding cavity.
7. The injection mold of claim 6, wherein each of the second molding members further comprises at least one stopper portion extending from the second blocking portion toward one side of the lower mold perpendicularly to the axial direction of the second molding member, and wherein an end portion of the stopper portion away from the second blocking portion abuts against a surface of the lower mold toward the upper mold after the injection mold is closed.
8. The injection mold of claim 7, wherein the center of gravity of the second molding member is offset toward an end of the second molding member remote from the connecting shaft.
9. The injection mold of claim 8, further comprising at least one guide structure, the guide structure comprising a guide member and an insertion channel, the guide member being mounted to the lower mold, the mounting portion and the guide member forming the insertion channel at a position corresponding to the mounting portion, the guide member being removably inserted into the insertion channel formed by the mounting portion.
10. The injection mold of claim 8, further comprising at least one guide structure, the guide structure comprising a guide member and an insertion channel, the guide member being mounted to the upper mold, the mounting portion and the guide member forming the insertion channel at a position corresponding to the mounting portion, the guide member being removably inserted into the insertion channel formed by the mounting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301635.XU CN221437064U (en) | 2023-02-23 | 2023-02-23 | Injection mold capable of removing back-off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301635.XU CN221437064U (en) | 2023-02-23 | 2023-02-23 | Injection mold capable of removing back-off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221437064U true CN221437064U (en) | 2024-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320301635.XU Active CN221437064U (en) | 2023-02-23 | 2023-02-23 | Injection mold capable of removing back-off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221437064U (en) |
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2023
- 2023-02-23 CN CN202320301635.XU patent/CN221437064U/en active Active
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