CN210175270U - Heat sealing mechanism - Google Patents
Heat sealing mechanism Download PDFInfo
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- CN210175270U CN210175270U CN201921064246.XU CN201921064246U CN210175270U CN 210175270 U CN210175270 U CN 210175270U CN 201921064246 U CN201921064246 U CN 201921064246U CN 210175270 U CN210175270 U CN 210175270U
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Abstract
The utility model relates to the technical field of sealing machines, in particular to a heat sealing mechanism, which comprises a frame, wherein an upper pressing module, a lower pressing module and a transmission module are arranged on the frame, and the transmission module drives the upper pressing module and the lower pressing module to close and separate; the transmission module comprises a sealing cylinder and a transmission unit, and the sealing cylinder drives the transmission unit to move up and down; the transmission unit comprises a driving main connecting rod, an upper connecting lever and a lower driving connecting block, the upper connecting lever and the lower driving connecting block are respectively arranged at two ends of the driving main connecting rod, and the upper connecting lever is connected with the upper driving connecting block; the upper driving connecting block is connected with the upper pressing module, and the lower driving connecting block is connected with the lower pressing module; the utility model discloses an go up the pressfitting module and push down the compound die piece under transmission module's same effect, the up removal of pressfitting module and the down removal of pushing down the compound die piece are gone up in the realization, or the down removal of going up the pressfitting module and the up removal of pushing down the compound die piece have simple structure's advantage.
Description
Technical Field
The utility model relates to a capper technical field especially relates to a heat sealing mechanism.
Background
The sealing machine is a machine for sealing a container after the container is filled with a product. The packaging containers are made of various materials, such as paper, plastic, glass, ceramic, metal, composite materials, and the like, and the shapes and physical properties of the packaging containers are different from each other.
The aluminum foil has the advantages of moisture resistance, air tightness, shading, fragrance retention, no toxicity, no odor and the like, can be used for processing beautiful patterns and decorative patterns of various colors due to the elegant silvery luster, and is widely applied to the industries of food, beverage, cigarettes, medicines, household daily necessities and the like.
When the existing sealing machine seals an aluminum foil packaging bag, the upper press-fit module and the lower press-fit module are generally required to be driven by means of two transmission modules, the moving distance and the moving time of the upper press-fit module and the lower press-fit module are difficult to accurately control in a unified mode, the defect that the equipment input cost is high exists, meanwhile, the moving time of the upper press-fit module and the moving time of the lower press-fit module are not unified, the waste of production operation time is caused, and the production efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a heat-seal mechanism goes up the pressfitting module and pushes down the compound die piece under transmission module's same effect, realizes going up the up-moving of pressfitting module and the down-moving of pushing down the compound die piece, or goes up the down-moving of pressfitting module and the up-moving of pushing down the compound die piece, and the speed that both removed is unanimous with the displacement, and control activity duration that can be very accurate has the advantage that production efficiency is high and simple structure.
In order to solve the technical problem, the utility model provides a concrete scheme as follows:
a heat sealing mechanism comprises a rack, wherein an upper pressing module, a lower pressing module and a transmission module are arranged on the rack, and the transmission module drives the upper pressing module and the lower pressing module to close and separate;
the transmission module comprises a sealing cylinder and a transmission unit, and the sealing cylinder drives the transmission unit to move up and down;
the transmission unit comprises a driving main connecting rod, an upper connecting lever and a lower driving connecting block, the upper connecting lever and the lower driving connecting block are respectively arranged at two ends of the driving main connecting rod, and the upper connecting lever is connected with the upper driving connecting block;
the upper driving connecting block is connected with the upper pressing module, and the lower driving connecting block is connected with the lower pressing module.
Optionally, a left slide rail and a right slide rail are respectively arranged on two sides of the rack, and an upper auxiliary slide module and a lower auxiliary slide module are arranged between the left slide rail and the right slide rail;
the upper auxiliary sliding module is arranged between the upper driving connecting block and the upper pressing module, the lower auxiliary sliding module is arranged between the lower driving connecting block and the lower pressing module, and the upper auxiliary sliding module and the lower auxiliary sliding module can better assist the upper pressing module and the lower pressing module to move upwards or downwards.
Optionally, the upper auxiliary sliding module includes an upper auxiliary left sliding block disposed on the left sliding rail and an upper auxiliary right sliding block disposed on the right sliding rail;
an upper connecting support is arranged between the upper auxiliary left sliding block and the upper auxiliary right sliding block, the upper connecting support is connected with an upper press-fit module, the upper press-fit module is arranged on the upper connecting support, the upper auxiliary left sliding block and the upper auxiliary right sliding block slide to drive the upper connecting support to move, and the upper connecting support drives the upper press-fit module to move.
Optionally, the lower auxiliary sliding module includes a lower auxiliary left sliding block disposed on the left sliding rail and a lower auxiliary right sliding block disposed on the right sliding rail;
the lower auxiliary left sliding block and the lower auxiliary right sliding block are provided with a lower connecting support, the lower connecting support is connected with a lower pressing and clamping module, the lower pressing and clamping module is arranged on the lower connecting support, the lower auxiliary left sliding block and the lower auxiliary right sliding block slide to drive the lower connecting support to move, and the lower connecting support drives the lower pressing and clamping module to move.
Optionally, the upper pressing module comprises an upper heat insulation plate, an upper heat seal fixing block and an upper heat seal block, the upper heat insulation plate is arranged at the upper end of the upper heat seal fixing block, and the upper heat seal block is arranged at the lower end of the upper heat seal fixing block;
the lower pressing and closing module comprises a lower heat-insulating plate and a lower heat-sealing opening block, the lower end of the lower heat-insulating opening block is arranged on the lower heat-insulating plate, the upper heat-insulating plate and the lower heat-insulating plate are arranged to avoid heat transfer of the upper heat-sealing opening block and the lower heat-sealing opening block to other components, and normal operation of the other components is influenced.
Optionally, a product correction module is further arranged between the upper pressing module and the lower pressing module, and when a product is handed over between the upper pressing module and the lower pressing module, the product correction module firstly performs one-time correction and leveling actions on the product so as to achieve a smooth and uniform sealing effect.
Optionally, an upper temperature sensor mounting hole and an upper heater mounting hole are formed in the upper heat seal fixing block; a temperature sensor is arranged in the upper temperature sensor mounting hole, and a heater is arranged in the upper heater mounting hole;
the lower heat-sealing opening block is provided with a lower temperature sensor mounting hole and a lower heater mounting hole; and a temperature sensor is arranged in the lower temperature sensor mounting hole, and a heater is arranged in the lower heater mounting hole.
Optionally, a character inlaying groove is formed in the upper heat sealing port block, a character piece is arranged in the character inlaying groove, when printed characters need to be replaced, the character piece in the character inlaying groove only needs to be taken down, and the needed character piece can be replaced.
Optionally, the upper connecting lever is provided with a connecting lever fixing block which has a certain guiding and positive performance, so that the upper connecting lever is prevented from deviating in the force transmission process.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses an go up the pressfitting module and push down the compound die piece under transmission module's same effect, the up removal of the last pressfitting module and the down removal of the compound die piece of pushing down of realization, or the down removal of going up the pressfitting module and the up removal of the compound die piece of pushing down, the speed that both removed is unanimous with the displacement, and control operation time that can be very accurate has production efficiency height and simple structure's advantage.
Drawings
Fig. 1 and fig. 2 are schematic diagrams illustrating an overall structure of a heat sealing mechanism according to an embodiment of the present invention.
Fig. 3 is a front view of a heat sealing mechanism provided in an embodiment of the present invention.
Fig. 4 is a side view of a heat sealing mechanism provided in an embodiment of the present invention.
Fig. 5 to 8 are schematic structural views of a heat sealing mechanism provided in an embodiment of the present invention.
Fig. 9 is a schematic structural view of a lower heat seal block provided in an embodiment of the present invention.
Fig. 10 is a schematic structural view of an upper heat sealing block according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of a character piece arranged on the upper heat seal block provided in the embodiment of the present invention.
Fig. 12 is a schematic structural diagram of a character component provided in an embodiment of the present invention.
Fig. 13 is a schematic structural view of an upper heat seal fixing block provided in an embodiment of the present invention.
Wherein, 1 is a frame; 2, an upper pressing module; 21 is an upper heat insulation plate; 22 is an upper heat seal fixing block; 221 is an upper temperature sensor mounting hole; 222 is an upper heater mounting hole; 23 is an upper heat seal port block; 231 is a character inlaying slot; 232 is a character; 3, pressing the die block downwards; 31 is a lower heat insulation plate; 32 is a lower heat seal port block; 321 is a lower temperature sensor mounting hole; 322 is a lower heater mounting hole; 4 is a transmission module; 41 is a sealing cylinder; 42 is a driving main connecting rod; 43 is an upper connecting lever; 44 is a lower drive connection block; 45 is an upper driving connecting block; 5 is a left slide rail; 6 is a right slide rail; 7 is an upper auxiliary sliding module; 71 is an upper auxiliary left slide block; 72 is an upper auxiliary right slide block; 8 is a lower auxiliary sliding module; 81 is a lower auxiliary left slide block; 82 is a lower auxiliary right slide block; 9 is an upper connecting support; 10 is a lower connecting support; 11 is a product correction module; 12 is a connecting lever fixing block; 13 is a temperature control box; 131 is a power switch; 132 is a temperature controller; 14 is a slide rail module; 15 is a chute; 16 is a positioning handle; 17 is a working operation positioning block; and 18 is a maintenance positioning block.
Detailed Description
In order to explain the technical solution of the present invention in detail, the following will combine the drawings of the embodiments of the present invention to perform clear and complete description on the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For example, a heat sealing mechanism comprises a frame, wherein an upper pressing module, a lower pressing module and a transmission module are arranged on the frame, and the transmission module drives the upper pressing module and the lower pressing module to close and separate; the transmission module comprises a sealing cylinder and a transmission unit, and the sealing cylinder drives the transmission unit to move up and down; the transmission unit comprises a driving main connecting rod, an upper connecting lever and a lower driving connecting block, the upper connecting lever and the lower driving connecting block are respectively arranged at two ends of the driving main connecting rod, and the upper connecting lever is connected with the upper driving connecting block; the upper driving connecting block is connected with the upper pressing module, and the lower driving connecting block is connected with the lower pressing module.
The last pressfitting module of this embodiment and the last pressfitting module of holding down under transmission module's same effect, the up-down removal of going up pressfitting module and holding down the removal of pressing the module, or the down-down removal of going up the pressfitting module and the up-down removal of holding down the module, the speed and the displacement that both removed are unanimous, and control activity duration that can be very accurate has production efficiency height and simple structure's advantage.
In some embodiments, as shown in fig. 1-3, a heat sealing mechanism is provided, which includes a frame, on which an upper press module, a lower press module, and a transmission module are disposed, the transmission module driving the upper press module and the lower press module to close and separate; the transmission module comprises a sealing cylinder and a transmission unit, and the sealing cylinder drives the transmission unit to move up and down; the transmission unit comprises a driving main connecting rod, an upper connecting lever and a lower driving connecting block, the upper connecting lever and the lower driving connecting block are respectively arranged at two ends of the driving main connecting rod, and the upper connecting lever is connected with the upper driving connecting block; the upper driving connecting block is connected with the upper pressing module, and the lower driving connecting block is connected with the lower pressing module.
Specifically, the sealing cylinder is arranged at the bottom of the frame, the driving transmission unit moves upwards or downwards, as shown in fig. 4, when the sealing cylinder extends out, the lower driving connection block and the driving main connection rod move upwards, and the lower pressing module also moves upwards as the lower driving connection block is connected with the lower pressing module. In the process of driving the main connecting rod to move upwards, according to the lever principle, one end of the upper connecting lever, which is connected with the driving main connecting rod, moves upwards, and the other end of the upper connecting lever, which is connected with the upper driving connecting block, moves downwards, so that the upper pressing module moves downwards. In the process of stretching out or contracting of the sealing cylinder, the upper pressing module moves downwards while moving downwards, or the upper pressing module moves downwards while moving upwards, the upper pressing module and the lower pressing module are acted by the same driving force, the moving speed of the upper pressing module and the lower pressing module is consistent with the displacement, the operation time can be controlled accurately, and the sealing cylinder has the advantages of high production efficiency and simple structure.
In some embodiments, as shown in fig. 5 to 8, a left slide rail and a right slide rail are respectively disposed on two sides of the rack, and an upper auxiliary sliding module and a lower auxiliary sliding module are disposed between the left slide rail and the right slide rail; the upper auxiliary sliding module is arranged between the upper driving connecting block and the upper pressing module, the lower auxiliary sliding module is arranged between the lower driving connecting block and the lower pressing module, and the upper auxiliary sliding module and the lower auxiliary sliding module can better assist the upper pressing module and the lower pressing module to move upwards or downwards.
Specifically, in this example, the frame is a quadrilateral frame, including a left side plate, a right side plate, an upper top plate and a lower bottom plate, a left slide rail is provided on the left side plate, a right slide rail is provided on the right side plate, an upper auxiliary slide module is provided on the upper ends of the left slide rail and the right slide rail, a lower auxiliary slide module is provided on the lower ends of the left slide rail and the right slide rail, an upper press-fit module is connected to the upper auxiliary slide module, the upper press-fit module is driven to move upwards or downwards better, and the lower auxiliary slide module is connected to the lower press-fit module, the lower press-fit module is driven to move.
In some embodiments, the upper auxiliary sliding module comprises an upper auxiliary left sliding block arranged on the left sliding rail and an upper auxiliary right sliding block arranged on the right sliding rail; an upper connecting support is arranged between the upper auxiliary left sliding block and the upper auxiliary right sliding block, the upper connecting support is connected with an upper press-fit module, the upper press-fit module is arranged on the upper connecting support, the upper auxiliary left sliding block and the upper auxiliary right sliding block slide to drive the upper connecting support to move, and the upper connecting support drives the upper press-fit module to move.
In some embodiments, the lower auxiliary sliding module comprises a lower auxiliary left sliding block arranged on the left sliding rail and a lower auxiliary right sliding block arranged on the right sliding rail; the lower auxiliary left sliding block and the lower auxiliary right sliding block are provided with a lower connecting support, the lower connecting support is connected with a lower pressing and clamping module, the lower pressing and clamping module is arranged on the lower connecting support, the lower auxiliary left sliding block and the lower auxiliary right sliding block slide to drive the lower connecting support to move, and the lower connecting support drives the lower pressing and clamping module to move.
In some embodiments, the upper pressing module comprises an upper heat insulation plate, an upper heat seal fixing block and an upper heat seal block, the upper heat insulation plate is arranged at the upper end of the upper heat seal fixing block, and the upper heat seal block is arranged at the lower end of the upper heat seal fixing block; the lower pressing and closing module comprises a lower heat-insulating plate and a lower heat-sealing opening block, the lower end of the lower heat-insulating opening block is arranged on the lower heat-insulating plate, the upper heat-insulating plate and the lower heat-insulating plate are arranged to avoid heat transfer of the upper heat-sealing opening block and the lower heat-sealing opening block to other components, and normal operation of the other components is influenced.
In some embodiments, a product calibration module is further disposed between the upper pressing module and the lower pressing module, and when a product is handed over between the upper pressing module and the lower pressing module, the product calibration module performs a calibration and leveling operation on the product to achieve a smooth and uniform sealing effect.
Specifically, in this example, the product correction module includes the correction cylinder and the push pedal of being connected with the correction cylinder, and the push pedal is located the opposite face of product, hands over when the product hands over to last pressfitting module and push down between the pressfitting module, and correction cylinder drive push pedal promotes the product and rectifies, and the correction cylinder retracts afterwards, goes up the pressfitting module and pushes down the pressfitting module and seals the action to the product.
In some embodiments, as shown in fig. 9 and 13, the upper heat seal fixing block is provided with an upper temperature sensor mounting hole and an upper heater mounting hole; a temperature sensor is arranged in the upper temperature sensor mounting hole, and a heater is arranged in the upper heater mounting hole; the lower heat-sealing opening block is provided with a lower temperature sensor mounting hole and a lower heater mounting hole; and a temperature sensor is arranged in the lower temperature sensor mounting hole, and a heater is arranged in the lower heater mounting hole.
Specifically, in this example, go up the heat-seal fixed block and be used for fixed heat-seal piece, it sets up to approximate rectangle form to go up the heat-seal fixed block, temperature sensor and heater wear to establish in whole last heat-seal fixed block, the heat that makes the heater can evenly distributed on last heat-seal fixed block, make the effect of sealing level and smooth more and even, in this example, it also is approximate to be the rectangle form to go up the heat-seal piece, upward be equipped with the installation screens that are used for installing the heat-seal piece on the heat-seal fixed block, upward be equipped with on the heat-seal piece with last heat-seal fixed block on the installation screens complex lock position.
In some embodiments, as shown in fig. 10 to 12, the upper heat sealing port block is provided with a character inlaying groove, a character piece is arranged in the character inlaying groove, when the printed characters need to be replaced, only the character piece in the character inlaying groove needs to be removed, and the needed character piece needs to be replaced, of course, the upper heat sealing port block without the character inlaying groove can also be used, and the upper heat sealing port block can be specifically replaced according to actual needs.
Specifically, the lower surface of heat-seal mouthful piece has seted up the character and has inlayed the groove under last heat-seal mouthful piece corresponds, the character inlays the inslot inner shell and is equipped with the character piece that needs the printing, fixed slotted hole still can be seted up at a side of last heat-seal mouthful piece to this embodiment, be equipped with on the fixed slotted hole and seal the fastener, the one end lock of sealing the fastener on is between the gap of last heat-seal mouthful fixed block and last heat insulating board, and pass through the bolt fastening, improve printing stability and ensure printing quality, and when the characters of printing need to be changed, only need loosen the screw of sealing the fastener on, just can take out heat-seal mouthful piece, change the character piece can, very simple, convenient.
In some embodiments, the upper connecting lever is provided with a connecting lever fixing block which has a certain guiding and positive performance so as to prevent the upper connecting lever from deviating in the force transmission process. The top of frame is equipped with temperature control box 13, is equipped with switch 131 and temperature controller 132 on the temperature control box 13, and after starting switch 131, temperature controller 132 controls the temperature that generates heat of heater, makes it accord with the requirement of sealing. Be equipped with slide rail module 14 in the bottom of frame 1, be equipped with the spout 15 that corresponds the slider module on the lower plate of frame, make frame 1 whole can slide on slide rail module 14, be convenient for the slip of frame, still be equipped with location handle 16 in the frame, through push-and-pull location handle 16, make whole heat sealing mechanism take place to come and go the displacement, still be equipped with work operation locating piece 17 and maintenance locating piece 18 with location handle 16 matched with in one side of slide rail module 14, when needing to maintain the heat sealing mechanism maintenance, artifical or device is automatic to be removed the location handle to the maintenance locating piece, and when needing the heat sealing mechanism to carry out the operation, artifical or the automatic bright location handle of device removes to the work operation locating piece.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but the limitation of the patent scope of the present invention can not be understood thereby. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present invention, and therefore, the scope of the present invention should be determined by the appended claims.
Claims (9)
1. A heat sealing mechanism comprises a rack (1), and is characterized in that an upper pressing module (2), a lower pressing module (3) and a transmission module (4) are arranged on the rack (1), and the transmission module (4) drives the upper pressing module (2) and the lower pressing module (3) to close and separate;
the transmission module (4) comprises a sealing air cylinder (41) and a transmission unit, and the sealing air cylinder (41) drives the transmission unit to move up and down;
the transmission unit comprises a driving main connecting rod (42), an upper connecting lever (43) and a lower driving connecting block (44), the upper connecting lever (43) and the lower driving connecting block (44) are respectively arranged at two ends of the driving main connecting rod (42), and the upper connecting lever (43) is connected with an upper driving connecting block (45);
the upper driving connecting block (45) is connected with the upper pressing module (2), and the lower driving connecting block (44) is connected with the lower pressing module (3).
2. A heat sealing mechanism according to claim 1, wherein a left slide rail (5) and a right slide rail (6) are respectively arranged at two sides of the machine frame (1), and an upper auxiliary slide module (7) and a lower auxiliary slide module (8) are arranged between the left slide rail (5) and the right slide rail (6);
the upper auxiliary sliding module (7) is arranged between the upper driving connecting block (45) and the upper pressing module (2), and the lower auxiliary sliding module (8) is arranged between the lower driving connecting block (44) and the lower pressing module (3).
3. A heat-seal mechanism according to claim 2, wherein said upper auxiliary slide module (7) comprises an upper auxiliary left slide (71) provided on the left slide rail (5) and an upper auxiliary right slide (72) provided on the right slide rail (6);
an upper connecting support (9) is arranged between the upper auxiliary left sliding block (71) and the upper auxiliary right sliding block (72), and the upper connecting support (9) is connected with the upper pressing module (2).
4. A heat-seal mechanism according to claim 2, wherein said lower auxiliary slide module (8) comprises a lower auxiliary left slide (81) provided on the left slide rail (5) and a lower auxiliary right slide (82) provided on the right slide rail (6);
a lower connecting support (10) is arranged between the lower auxiliary left sliding block (81) and the lower auxiliary right sliding block (82), and the lower connecting support (10) is connected with the lower pressing module (3).
5. A heat-sealing mechanism according to claim 1, wherein said upper press-fit module (2) comprises an upper heat-insulating plate (21), an upper heat-seal fixing block (22) and an upper heat-seal block (23), said upper heat-insulating plate (21) being disposed at an upper end of the upper heat-seal fixing block (22), said upper heat-seal block (23) being mounted at a lower end of the upper heat-seal fixing block (22);
the lower pressing and closing module (3) comprises a lower heat insulation plate (31) and a lower heat sealing opening block (32), wherein the lower heat insulation plate (31) is arranged at the lower end of the lower heat sealing opening block (32).
6. A heat seal mechanism according to claim 1, wherein a product aligning module (11) is further provided between the upper press module (2) and the lower press module (3).
7. The heat-seal mechanism according to claim 5, wherein said upper heat-seal fixing block (22) is provided with an upper temperature sensor mounting hole (221) and an upper heater mounting hole (222); a temperature sensor is arranged in the upper temperature sensor mounting hole (221), and a heater is arranged in the upper heater mounting hole (222);
a lower temperature sensor mounting hole (321) and a lower heater mounting hole (322) are formed in the lower heat sealing opening block (32); and a temperature sensor is arranged in the lower temperature sensor mounting hole (321), and a heater is arranged in the lower heater mounting hole (322).
8. A heat-seal mechanism according to claim 5, wherein said upper heat-seal land block (23) is provided with a character receiving groove (231), and said character receiving groove (231) is provided with a character element (232).
9. A heat-sealing mechanism as claimed in claim 1, wherein said upper connecting lever (43) is provided with a connecting lever fixing block (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064246.XU CN210175270U (en) | 2019-07-09 | 2019-07-09 | Heat sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921064246.XU CN210175270U (en) | 2019-07-09 | 2019-07-09 | Heat sealing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210175270U true CN210175270U (en) | 2020-03-24 |
Family
ID=69840420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921064246.XU Active CN210175270U (en) | 2019-07-09 | 2019-07-09 | Heat sealing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210175270U (en) |
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2019
- 2019-07-09 CN CN201921064246.XU patent/CN210175270U/en active Active
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