CN218858863U - Packaging film heat sealing device - Google Patents
Packaging film heat sealing device Download PDFInfo
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- CN218858863U CN218858863U CN202222903042.9U CN202222903042U CN218858863U CN 218858863 U CN218858863 U CN 218858863U CN 202222903042 U CN202222903042 U CN 202222903042U CN 218858863 U CN218858863 U CN 218858863U
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- resistant cloth
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Abstract
The utility model discloses a packaging film heat-seal device, include: the lower die assembly and the upper die assembly are movably arranged above the lower die assembly in a lifting mode, the lower die assembly is provided with a first hot pressing piece and first high-temperature-resistant cloth arranged above the first hot pressing piece, the upper die assembly is provided with a second hot pressing piece and second high-temperature-resistant cloth arranged above the second hot pressing piece, and the lower die assembly or the upper die assembly is provided with a blowing assembly arranged in the width direction of the packaging film. When the heat-seal packaging film, go up the mould subassembly and be close to the lower mould subassembly so that second high temperature resistant cloth and first high temperature resistant cloth clamp the wrapping film, when last mould subassembly kept away from the lower mould subassembly, the subassembly of blowing blows towards the juncture of first high temperature resistant cloth and packaging film or the juncture of second high temperature resistant cloth and packaging film, utilize high-pressure gas to assist the packaging film and first high temperature resistant cloth or the phase separation of second high temperature resistant cloth, reduce the local wrinkling of packaging film, local tensile scheduling problem excessively, guarantee the shaping quality of wrapping bag.
Description
Technical Field
The utility model relates to the field of packaging technology, especially, relate to a packaging film heat-seal device.
Background
A common heat sealing apparatus uses an upper die assembly and a lower die assembly that are relatively close to each other to clamp the packaging film, thereby achieving heat sealing. The lower die assembly and the upper die assembly are respectively provided with a first hot pressing piece and a second hot pressing piece.
In order to achieve a more sufficient heat-seal effect, the upper and lower surfaces of the packaging film are generally heat-sealed alternately, and therefore, when the upper surface of the packaging film is heat-sealed, the heat-generating temperature of the second heat pressing member is higher than the heat-generating temperature of the first heat pressing member, and when the lower surface of the packaging film is heat-sealed, the heat-generating temperature of the first heat pressing member is higher than the heat-generating temperature of the second heat pressing member.
When the upper and lower mold assemblies are relatively distant, the packaging film is easily stuck to the upper or lower mold assembly having a relatively high temperature, and for this reason, some of the heat-sealing devices for packaging films are equipped with high-temperature-resistant cloths above the upper mold assembly and below the lower mold assembly in the related art.
However, the packaging film made of a single-material composite film (such as a combination of HDPE and LDPE) has high temperature sensitivity, and the high temperature cloth corresponding to the upper mold assembly or the lower mold assembly with high temperature still remains adhered to the packaging film when the packaging film is separated from the packaging film, so that the packaging film is partially stretched excessively, thereby affecting the forming quality of the packaging bag.
In addition, when the upper die assembly and the lower die assembly are far away from each other in the vertical direction, the high-temperature-resistant cloth is far away from the packaging film in the vertical direction, and the packaging film is also subjected to the traction force applied to the packaging film by the transmission roller group of the production line, so that the tearing action is formed between the high-temperature-resistant cloth and the packaging film, and the conditions of local wrinkling, local excessive stretching and the like of the packaging film are caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a help high temperature resistant cloth and packaging film heat-seal device of looks separation reduces the local scheduling problem that corrugates of packaging film, local tensile, guarantees the shaping quality of wrapping bag.
According to the utility model discloses packaging film heat-seal device, include: the lower die assembly and the upper die assembly are movably arranged above the lower die assembly in a lifting mode, the lower die assembly is provided with a first hot pressing piece and first high-temperature-resistant cloth arranged above the first hot pressing piece, the upper die assembly is provided with a second hot pressing piece and second high-temperature-resistant cloth arranged above the second hot pressing piece, the lower die assembly or the upper die assembly is provided with a blowing assembly arranged along the width direction of a packaging film, and the blowing assembly can drive the first high-temperature-resistant cloth to be separated from the packaging film or drive the second high-temperature-resistant cloth to be separated from the packaging film.
The heat sealing device of the packaging film provided by the embodiment of the utility model at least comprises the following components
Has the beneficial effects that:
when the heat-seal packaging film, go up the mould subassembly and be close to the lower mould subassembly so that the second on the second hot pressing piece is high temperature resistant cloth and the first high temperature resistant cloth clamp packaging film on the first hot pressing piece, when last mould subassembly was kept away from the lower mould subassembly, the subassembly of blowing blows towards the juncture of first high temperature resistant cloth and packaging film or the juncture of second high temperature resistant cloth and packaging film, utilize high-pressure gas to assist packaging film and first high temperature resistant cloth phase separation or packaging film and the high temperature resistant cloth phase separation of second, reduce the local wrinkling of packaging film, local tensile scheduling problem excessively, guarantee the shaping quality of wrapping bag.
The utility model discloses an in some embodiments, the subassembly of blowing is including locating the trachea of the front side of lower mould subassembly, the trachea is arranged along the width direction of packaging film, tracheal tip is equipped with the air inlet that is linked together rather than the inside passage, the trachea is provided with a plurality of ventholes along its length direction interval, the venthole orientation the second is high temperature resistant cloth.
In some embodiments of the present invention, the second high temperature-resistant cloth is connected with a first driving mechanism capable of driving the second high temperature-resistant cloth to move along the conveying direction of the packaging film while gradually separating from the packaging film.
In some embodiments of the present invention, the first driving mechanism includes a plurality of transmission rollers rotatably disposed on the upper mold assembly and surrounding the outer portion of the upper mold assembly, and the second high temperature resistant fabric is sequentially wound on the plurality of transmission rollers to be capable of rotating.
In some embodiments of the utility model, the upper die assembly includes the upper die support, the second hot pressing piece is located the lower extreme of upper die support, the lower extreme of upper die support in the both ends of second hot pressing piece are provided with first side and stretch the frame, the both ends on the upper portion of upper die support are provided with second side and stretch the frame, first side stretch the frame the second side stretch the frame all stretch out in the front side and the rear side of upper die support, the transmission roller rotates to be located first side stretch the frame perhaps the second side stretches the frame.
In some embodiments of the present invention, the first driving mechanism includes two rotating rollers, which are respectively rotatably disposed at the front and rear sides of the upper mold assembly, a belt pulley assembly for driving the rotating rollers, and a motor belt pulley mechanism for driving the rotating rollers to rotate forward and backward.
The utility model discloses an in some embodiments, lower mould subassembly with be equipped with between the last mould subassembly and be located respectively lower mould subassembly perhaps go up the first cooling transmission roller and the second cooling transmission roller of mould subassembly both sides around.
In some embodiments of the present invention, the first cooling conveying roller and the second cooling conveying roller each include a pipe rotatably disposed on the lower mold assembly or the upper mold assembly and arranged along the width direction of the packaging film, a water passage is disposed inside the pipe, and a water inlet and a water outlet communicated with the water passage are disposed at the end of the pipe.
The utility model discloses an in some embodiments, first cooling transmission roller is installed the front side of lower mould subassembly, second cooling transmission roller is installed go up the rear side of mould subassembly it is relative to go up the mould subassembly when lower mould subassembly rebound, first cooling transmission roller orders about the upper surface of packaging film and keeps away from the second is high temperature resistant cloth the lower surface that second cooling transmission roller ordered about the packaging film keeps away from first is high temperature resistant cloth.
The utility model discloses an in some embodiments, vertical guide post is worn to be equipped with by lower mould subassembly activity, the upper end of vertical guide post is connected go up the mould subassembly, vertical guide post is worn to be equipped with and orders about go up the mould subassembly and keep away from the elastic component of lower mould subassembly, the lower extreme transmission of vertical guide post is connected with the drive the lift driver that vertical guide post reciprocated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an embodiment of a heat-sealing device for a packaging film according to the present invention;
FIG. 2 is a schematic cross-sectional view of the embodiment of FIG. 1;
FIG. 3 is a schematic view of the construction of the air blowing assembly of the embodiment of FIG. 1;
fig. 4 is a schematic structural view of another embodiment of the heat-sealing device for packaging film of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of the embodiment of fig. 4.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3 or fig. 3 to 5, a heat sealing device for a packaging film of the present invention includes: the lower die assembly 100 and the upper die assembly 200 movably arranged above the lower die assembly 100 in a lifting manner, the lower die assembly 100 is provided with a first hot pressing piece 110 and a first high-temperature-resistant cloth 120 arranged above the first hot pressing piece 110, the upper die assembly 200 is provided with a second hot pressing piece 210 and a second high-temperature-resistant cloth 220 arranged above the second hot pressing piece 210, the lower die assembly 100 or the upper die assembly 200 is provided with a blowing assembly 300 arranged along the width direction of the packaging film, and the blowing assembly 300 can drive the first high-temperature-resistant cloth 120 to be separated from the packaging film or drive the second high-temperature-resistant cloth 220 to be separated from the packaging film.
When the packaging film is heat-sealed, the upper die assembly 200 is close to the lower die assembly 100 so that the second high-temperature-resistant cloth 220 on the second hot pressing part 210 and the first high-temperature-resistant cloth 120 on the first hot pressing part 110 clamp the packaging film, when the upper die assembly 200 is far away from the lower die assembly 100, the air blowing assembly 300 blows air towards the junction of the first high-temperature-resistant cloth 120 and the packaging film or the junction of the second high-temperature-resistant cloth 220 and the packaging film, and high-pressure air is used for assisting the separation of the packaging film and the first high-temperature-resistant cloth 120 or the separation of the packaging film and the second high-temperature-resistant cloth 220, so that the problems of local wrinkling, local excessive stretching and the like of the packaging film are reduced, and the forming quality of the packaging film is ensured. It should be noted that the air blowing assemblies 300 arranged in the width direction of the packaging film subject the packaging film to high-pressure air at various positions in the width direction. When the upper surface of the packaging film is heat-sealed, the temperature of the second heat pressing member 210 is higher than that of the first heat pressing member 110, the first heat pressing member 110 only plays a role of preheating the packaging film, and the air blowing assembly 300 blows air toward the boundary of the second high temperature resistant cloth 220 and the packaging film; when the lower surface of the wrap film is heat-sealed, the first heat press member 110 has a higher temperature than the second heat press member 210, the second heat press member 210 serves only to preheat the wrap film, and the blowing assembly 300 blows air toward the boundary between the first high temperature cloth 120 and the wrap film.
Referring to fig. 3, in some embodiments of the present invention, the blowing assembly 300 includes an air tube 310 disposed at the front side of the lower mold assembly 100, the air tube 310 is disposed along the width direction of the packaging film, an air inlet 320 communicated with the inner channel of the air tube 310 is disposed at the end of the air tube 310, a plurality of air outlets 330 are disposed at intervals along the length direction of the air tube 310, and the air outlets 330 face the second high temperature resistant cloth 220. The blowing assembly 300 is simple in structure, convenient to process and low in cost.
Referring to fig. 1 and 2, or fig. 4 and 5, in some embodiments of the present invention, the second high temperature-resistant cloth 220 is connected with a first driving mechanism 400 capable of driving the second high temperature-resistant cloth to move along the conveying direction of the packaging film while being gradually separated from the packaging film. After the upper surface of the packaging film is heat sealed, when the first heat pressing part 110 and the second heat pressing part 210 are far away from each other, the first driving mechanism 400 drives the second high temperature resistant cloth 220 to move along the conveying direction of the packaging film and enables the second high temperature resistant cloth 220 to be gradually separated from the upper surface of the packaging film, so that the problems of local wrinkling, local excessive stretching and the like caused by large-area peeling of the packaging film from the second high temperature resistant cloth 220 are avoided, and meanwhile, the air blowing assembly 300 is matched to cool the packaging film and assist the peeling of the packaging film from the second high temperature resistant cloth 220, so that the subsequent forming quality of the packaging bag is ensured. The transport direction of the packaging film is shown by the dotted line with arrows in fig. 2 or fig. 5.
Referring to fig. 1 and 2, in some embodiments of the present invention, the first driving mechanism 400 includes a plurality of transmission rollers 410 rotatably disposed on the upper mold assembly 200 and surrounding the outer portion of the upper mold assembly 200, and the second high temperature resistant cloth 220 sequentially surrounds the plurality of transmission rollers 410 to be capable of rotating. It should be noted that, after the heat sealing of the packaging film is completed, the upper mold assembly 200 is far away from the lower mold assembly 100, and at this time, the transmission roller set on the production line can drive the packaging film to move continuously along the conveying direction of the packaging film, in this process, the second high temperature resistant cloth 220 is drawn by the packaging film and moves forward along with the packaging film, then the second high temperature resistant cloth 220 rotates around the plurality of transmission rollers 410, and in the process of the rotation of the second high temperature resistant cloth 220, the second high temperature resistant cloth 220 is lifted away from the packaging film and gradually separated from the packaging film until finally completely separated. The above first driving mechanism 400 helps to avoid the problem that the second high temperature resistant cloth 220 is separated from the packaging film in a large area at a time, which causes partial wrinkling and partial stretching of the packaging film.
Referring to fig. 4 and 5, in some embodiments of the present invention, the upper mold assembly 200 includes an upper mold support 201, the second thermal pressing member 210 is disposed at a lower end of the upper mold support 201, the lower end of the upper mold support 201 is provided with a first side stretching frame 420 at two ends of the second thermal pressing member 210, two ends of an upper portion of the upper mold support 201 are provided with a second side stretching frame 430, the first side stretching frame 420 and the second side stretching frame 430 all stretch out of a front side and a rear side of the upper mold support 201, and the transmission roller 410 is rotatably disposed at the first side stretching frame 420 or the second side stretching frame 430. The assembly of the driving roller 410 and the second high temperature-resistant cloth 220 to the outer circumference of the upper mold assembly 200 is facilitated by the above structure.
Referring to fig. 2 or 5, in some embodiments of the present invention, the first driving mechanism 400 includes two rotating rollers 440 rotatably disposed at the front and rear sides of the upper mold assembly 200, a pulley assembly 450 drivingly connecting the two rotating rollers 440, and a motor pulley mechanism 460 for driving one of the rotating rollers 440 to rotate in the forward and reverse directions. It can be understood that both ends of the second high temperature cloth 220 are respectively fixed on two rotating rollers 440, a part of the second high temperature cloth 220 can be wound on any one of the rotating rollers 440, and when the motor pulley mechanism 460 drives one of the rotating rollers 440 to rotate, the second high temperature cloth 220 can move forward along the conveying direction of the packaging film and move upward relative to the packaging film, thereby generating an upward lifting action effect.
Referring to fig. 2 or 5, in some embodiments of the present invention, a first cooling transfer roller 500 and a second cooling transfer roller 600 are disposed between the lower mold assembly 100 and the upper mold assembly 200 and respectively disposed at front and rear sides of the lower mold assembly 100 or the upper mold assembly 200. It should be noted that the packaging film is easily elongated during the transportation process due to the accumulation of a certain amount of heat in the previous process, the second cooling transfer roller 600 cools the packaging film before heat sealing, and the first cooling transfer roller 500 cools the packaging film after heat sealing, so that the stretch deformation of the packaging film can be reduced.
In some embodiments of the present invention, each of the first cooling transfer roller 500 and the second cooling transfer roller 600 includes a pipe rotatably disposed on the lower mold assembly 100 or the upper mold assembly 200 and arranged along the width direction of the packaging film, a water passage is provided inside the pipe, and a water inlet and a water outlet communicated with the water passage are provided at the end of the pipe. It can be understood that the water inlet and the water outlet are respectively communicated with an external water path, and circulation is realized through the water pump, so that heat on the surface of the packaging film is continuously taken away.
Referring to fig. 2 or fig. 5, in some embodiments of the present invention, the first cooling transmission roller 500 is installed at the front side of the lower mold assembly 100, the second cooling transmission roller 600 is installed at the rear side of the upper mold assembly 200, when the upper mold assembly 200 moves upward relative to the lower mold assembly 100, the first cooling transmission roller 500 orders the upper surface of the packaging film to be away from the second high temperature resistant cloth 220, and the second cooling transmission roller 600 orders the lower surface of the packaging film to be away from the first high temperature resistant cloth 120, which is beneficial to the separation of the packaging film from the first high temperature resistant cloth 120 and the second high temperature resistant cloth 220.
Referring to fig. 1, in some embodiments of the present invention, the lower mold assembly 100 is movably provided with a vertical guide post 710, the upper end of the vertical guide post 710 is connected to the upper mold assembly 200, the vertical guide post 710 is provided with an elastic member 720 for driving the upper mold assembly 200 to be away from the lower mold assembly 100, and the lower end of the vertical guide post 710 is in transmission connection with a lifting driver for driving the vertical guide post 710 to move up and down. The elastic member 720 can facilitate the upward return movement of the upper mold assembly 200 by driving the upper mold assembly 200 to reciprocate up and down with respect to the lower mold assembly 100 by the lift driver.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A packaging film heat seal apparatus, comprising:
the lower die assembly (100) and the upper die assembly (200) are movably arranged above the lower die assembly (100) in a lifting mode, the lower die assembly (100) is provided with a first hot pressing piece (110) and a first high-temperature-resistant cloth (120) arranged above the first hot pressing piece (110), the upper die assembly (200) is provided with a second hot pressing piece (210) and a second high-temperature-resistant cloth (220) arranged above the second hot pressing piece (210), the lower die assembly (100) or the upper die assembly (200) is provided with a blowing assembly (300) arranged in the width direction of a packaging film, and the blowing assembly (300) can drive the first high-temperature-resistant cloth (120) to be separated from the packaging film or drive the second high-temperature-resistant cloth (220) to be separated from the packaging film.
2. A packaging film heat-seal apparatus according to claim 1, wherein:
the blowing assembly (300) comprises an air pipe (310) arranged on the front side of the lower die assembly (100), the air pipe (310) is arranged in the width direction of the packaging film, an air inlet (320) communicated with an internal channel of the air pipe (310) is formed in the end portion of the air pipe (310), a plurality of air outlet holes (330) are formed in the air pipe (310) along the length direction of the air pipe at intervals, and the air outlet holes (330) face the second high-temperature-resistant cloth (220).
3. A packaging film heat-seal apparatus according to claim 2, wherein:
the second high-temperature-resistant cloth (220) is connected with a first driving mechanism (400) which can drive the second high-temperature-resistant cloth to move along the conveying direction of the packaging film and simultaneously gradually separate from the packaging film.
4. A packaging film heat-seal apparatus according to claim 3, wherein:
first actuating mechanism (400) including a plurality of rotate set up in go up mould assembly (200) and encircle in go up the transmission roller (410) that the outside of mould assembly (200) set up, second resistant high temperature cloth (220) are in proper order around locating a plurality of transmission roller (410) are with can rotary motion.
5. A packaging film heat-seal apparatus according to claim 4, wherein:
go up mould subassembly (200) including last mould support (201), second hot pressing spare (210) are located go up the lower extreme of mould support (201), go up the lower extreme of mould support (201) in the both ends of second hot pressing spare (210) are provided with first side and stretch frame (420), the both ends on the upper portion of last mould support (201) are provided with second side and stretch frame (430), first side stretch frame (420), second side stretch frame (430) all stretch out in go up the front side and the rear side of mould support (201), transmission roller (410) are rotated and are located first side stretch frame (420) or second side stretch frame (430).
6. A packaging film heat-seal apparatus according to claim 3, wherein:
the first driving mechanism (400) comprises two rotating rollers (440) which are respectively arranged on the front side and the rear side of the upper die assembly (200) in a rotating mode, a belt wheel assembly (450) which is in transmission connection with the two rotating rollers (440), and a motor belt wheel mechanism (460) which drives one of the rotating rollers (440) to rotate forwards and backwards.
7. The heat-seal apparatus for packaging film according to claim 1, wherein:
lower mould subassembly (100) with be equipped with between last mould subassembly (200) and be located respectively lower mould subassembly (100) or go up the first cooling transmission roller (500) and the second cooling transmission roller (600) of mould subassembly (200) both sides around.
8. The heat-seal apparatus for packaging film according to claim 7, wherein:
first cooling transmission roller (500) second cooling transmission roller (600) all locate including rotating lower mould subassembly (100) or go up mould subassembly (200) and the body of arranging along the width direction of packaging film, the inside of body is equipped with the water channel, the tip of body be equipped with water channel is linked together water inlet and delivery port.
9. The heat-seal apparatus for packaging film according to claim 8, wherein:
first cooling transmission roller (500) are installed the front side of lower mould subassembly (100), second cooling transmission roller (600) are installed go up the rear side of mould subassembly (200) go up mould subassembly (200) are relative when lower mould subassembly (100) rebound, first cooling transmission roller (500) order about the upper surface of packaging film to be kept away from second is able to bear or endure high temperature cloth (220), second cooling transmission roller (600) order about the lower surface of packaging film to keep away from first is able to bear or endure high temperature cloth (120).
10. A packaging film heat-seal apparatus according to claim 1, wherein:
lower mould subassembly (100) activity is worn to be equipped with vertical guide post (710), the upper end of vertical guide post (710) is connected go up mould subassembly (200), vertical guide post (710) is worn to be equipped with and is driven go up mould subassembly (200) and keep away from elastic component (720) of lower mould subassembly (100), the lower extreme transmission of vertical guide post (710) is connected with the drive the lift driver that vertical guide post (710) reciprocated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222903042.9U CN218858863U (en) | 2022-11-01 | 2022-11-01 | Packaging film heat sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222903042.9U CN218858863U (en) | 2022-11-01 | 2022-11-01 | Packaging film heat sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218858863U true CN218858863U (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222903042.9U Active CN218858863U (en) | 2022-11-01 | 2022-11-01 | Packaging film heat sealing device |
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| Country | Link |
|---|---|
| CN (1) | CN218858863U (en) |
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2022
- 2022-11-01 CN CN202222903042.9U patent/CN218858863U/en active Active
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