CN212306959U - Automatic ear rope clamping device for mask ear rope - Google Patents
Automatic ear rope clamping device for mask ear rope Download PDFInfo
- Publication number
- CN212306959U CN212306959U CN202020906115.8U CN202020906115U CN212306959U CN 212306959 U CN212306959 U CN 212306959U CN 202020906115 U CN202020906115 U CN 202020906115U CN 212306959 U CN212306959 U CN 212306959U
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- rotating shaft
- rope clamping
- rope
- block
- limiting
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- 230000007246 mechanism Effects 0.000 claims abstract description 78
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- 208000014674 injury Diseases 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
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Abstract
The utility model discloses an automatic ear rope clamping device of a mask ear rope, which comprises a frame, a rope clamping mechanism, a limiting mechanism and a driving mechanism; the frame is provided with a first rope clamping block; the rope clamping mechanisms comprise rotating shafts, driving pieces, limiting blocks and second rope clamping blocks; the driving piece drives the rotating shaft to rotate; the limiting block is arranged on the rotating shaft and rotates along with the rotating shaft; the second rope clamping block is arranged on the rotating shaft and is close to or far away from the first rope clamping block along with the rotation of the rotating shaft; the limiting mechanism is arranged on the frame and positioned between the two rope clamping mechanisms, and comprises a stop block which is abutted against the limiting block; the driving mechanism drives the limiting mechanism to move backwards, the stop block moves backwards to be separated from the limiting block, the rotating shaft rotates towards one direction under the acting force of the driving piece, and the second rope clamping block rotates along with the rotating shaft and is tightly clamped with the first rope clamping block. The utility model discloses reduce the use of cylinder or motor, realized automatic double-layered line equally, the structure is simplified, has reduced occupation space, has practiced thrift the cost, and production efficiency is higher.
Description
Technical Field
The utility model belongs to the technical field of gauze mask equipment and specifically relates to indicate an automatic ear rope clamping device of gauze mask ear rope.
Background
The mask is a sanitary article, is generally worn at the mouth and nose part for filtering air entering the mouth and nose so as to achieve the purpose of preventing harmful gas, smell and spray from entering and exiting the mouth and nose of a wearer, is made of gauze or paper and the like, has a certain filtering effect on air entering the lung, and has a very good effect when the mask is worn in operation in an environment polluted by dust and the like when respiratory infectious diseases are prevalent.
The mask comprises a mask main body and ear ropes, wherein the ear ropes are fixed on the mask main body, and the ear ropes are used for fixing the mask main body on the face of a user. All including the ear rope clamping mechanism who is used for pressing from both sides the ear rope and adjusts ear rope length in the equipment of production gauze mask, traditional ear rope clamping device structure is complicated, and at the in-process of carrying out trapping and line ball to the ear rope, need use a plurality of cylinders or motor to drive the mechanism action that corresponds, occupy the usage space, and the cost is higher, and moves complicacy, and production efficiency is lower relatively.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an automatic ear-clipping rope device for a mask ear rope, which effectively solves the problems of complicated structure, occupying usage space, high cost, complicated operation and relatively low production efficiency of the existing ear-clipping rope device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an automatic lug rope clamping device of a mask lug rope comprises a rack, two rope clamping mechanisms respectively used for clamping two ends of the lug rope, a limiting mechanism used for limiting the two rope clamping mechanisms to rotate and a driving mechanism used for driving the limiting mechanism to move backwards; two sides of the front end surface of the frame are respectively provided with a first rope clamping block; the two rope clamping mechanisms are respectively arranged on two sides of the rack, each rope clamping mechanism comprises a rotating shaft, a driving piece, a limiting block and a second rope clamping block, and the rotating shafts are rotatably arranged on the rack; one end of the driving piece is connected to the rack, the other end of the driving piece is connected to the rotating shaft, and the driving piece drives the rotating shaft to rotate; the limiting block is arranged on the rotating shaft and rotates along with the rotating shaft; the second rope clamping block is arranged on the rotating shaft and is close to or far away from the first rope clamping block along with the rotation of the rotating shaft; the limiting mechanism is arranged on the frame and positioned between the two rope clamping mechanisms, and comprises a stop block which is abutted against the limiting block to prevent the rotating shaft from rotating; the driving mechanism drives the limiting mechanism to move backwards, the stop block moves backwards to be separated from the limiting block, the rotating shaft rotates towards one direction under the acting force of the driving piece, and the second rope clamping block rotates along with the rotating shaft and is tightly clamped with the first rope clamping block.
Preferably, the surface of the first rope clamping block is provided with an arc concave surface for avoiding the injury of the ear ropes.
Preferably, the bottom surface of the frame is provided with a mounting seat, and the rotating shaft is rotatably mounted on the mounting seat through a bearing.
As a preferred scheme, the driving piece is a torsion spring, and the rear end of the torsion spring is inserted into the mounting seat and fixed; correspondingly, a fixed block is fixed on the rotating shaft, and the front end of the torsion spring is inserted into the fixed block for fixing.
As a preferred scheme, the limiting mechanism further comprises a shaft body, a base plate, a spring and a guide rail, wherein a seat frame is arranged on the surface of the rear end of the rack, the shaft body is arranged on the seat frame in a manner of moving back and forth, and the front end of the shaft body is fixed with the base plate; the spring is sleeved outside the shaft body, the rear end of the spring abuts against the seat frame, the front end of the spring abuts against the surface of the substrate, and the spring enables the substrate to move forwards and reset; the guide rail is arranged on the bottom surface of the base plate and moves back and forth along with the base plate, the stop block is fixed on the guide rail, and the guide rail drives the stop block to move back and forth.
Preferably, the guide rail is a cross roller guide rail with excellent structural performance.
As a preferable scheme, the driving mechanism is a rope pulling head, the rope pulling head is positioned above the rack, and the rope pulling head moves back and forth above the rack under the driving of the cylinder; the later generation of the base plate is bent upwards to form a contact part, and the pull rope head moves backwards to contact with the contact part to drive the base plate to move backwards.
As a preferable scheme, a sliding groove for the front and back movement of the rope pulling head is concavely arranged on the top surface of the frame, and the base plate is positioned at the rear end of the sliding groove and moves back and forth at the rear end of the sliding groove.
As a preferred scheme, the inner end of the limiting block is provided with a hook part which is hooked on the bottom surface of the stop block for fixing.
Preferably, a mounting plate is fixed to the rear end of the rotating shaft, and a screw is disposed on the inner side of the mounting plate and abuts against a top block on the external cylinder to urge the rotating shaft to rotate in the direction and reset.
Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:
the limiting mechanism limiting the rotation of the two rope clamping mechanisms is arranged between the two rope clamping mechanisms, the driving mechanism moves backwards to drive the stop block on the limiting mechanism to move backwards, after the lug rope pulls a specified length, the stop block is just separated from the limiting blocks on the two rope clamping mechanisms, the rotating shafts on the two rope clamping mechanisms rotate towards one direction under the torsion action of the driving piece, the second rope clamping blocks rotate along with the rotating shafts, and the two second rope clamping blocks on the two rope clamping mechanisms rotate to be clamped with the corresponding first rope clamping blocks, so that the two ends of the lug rope are clamped; the utility model discloses reduce the use of cylinder or motor, realized automatic double-layered line equally, the structure is simplified, has reduced occupation space, has practiced thrift the cost, and production efficiency is higher.
And the torsion spring is used for driving the rotating shaft to rotate so as to realize wire clamping, and replaces the traditional cylinder or motor driven wire clamping, so that the cost is lower, the occupied space is not occupied, and the structure is simplified.
Thirdly, the driving mechanism is a stay cord head, the stay cord is skillfully applied, the limiting mechanism is driven to move backwards, and when the length of the ear cord pulled out by the stay cord head reaches a specified length, the stop block is separated from the limiting block, so that the rotating shaft is driven to rotate under the action force of the driving piece to realize wire clamping; it compares traditional stay cord and presss from both sides the rope device, need use a plurality of motors or cylinder to drive and realize a plurality of actions, and the utility model discloses, only need use a cylinder of drive stay cord head can realize stay cord and press from both sides the line, practiced thrift the cost greatly, reduced the usage space, production efficiency is higher.
Four, through adopting the cross roller guide rail that structural performance is good with the guide rail, it has that rolling friction is little, stability can be good, mechanical energy consumption is little and the precision is high, fast, bearing capacity advantage such as big, thereby makes the utility model discloses life is longer.
To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a perspective view of the preferred embodiment of the present invention in an inoperative state;
FIG. 2 is another perspective view of the preferred embodiment of the present invention in an inoperative condition;
FIG. 3 is a perspective view of the hidden frame of the preferred embodiment of the present invention in an inoperative state;
FIG. 4 is a perspective view of the preferred embodiment of the present invention in an operating state;
FIG. 5 is another perspective view of the preferred embodiment of the present invention in an operational state;
fig. 6 is a perspective view of the hidden frame in the working state according to the preferred embodiment of the present invention.
The attached drawings indicate the following:
10. frame 101, chute
11. First rope clamping block 111 and arc concave surface
12. Mounting base 13, seat frame
20. Rope clamping mechanism 21 and rotating shaft
22. Driving piece (torsion spring) 23, limiting block
24. Second rope clamping block 25 and fixing block
26. Mounting plate 27, screw
30. Limiting mechanism 31 and stopper
32. Shaft body 33 and substrate
331. Abutting part 34 and spring
35. Guides 40, driving mechanism (rope pulling head)
50. Ear ropes.
Detailed Description
Referring to fig. 1 to 6, a specific structure of a preferred embodiment of the present invention is shown, which includes a frame 10, two rope clamping mechanisms 20 for clamping two ends of an ear rope, a limiting mechanism 30 for limiting the rotation of the two rope clamping mechanisms, and a driving mechanism 40 for driving the limiting mechanism to move backward.
The two sides of the front end surface of the frame 10 are respectively provided with a first rope clamping block 11, and the surface of the first rope clamping block 11 is provided with an arc-shaped concave surface 111 for avoiding the ear rope clamping injury.
The two rope clamping mechanisms 20 are respectively installed at two sides of the frame 10, each rope clamping mechanism 20 includes a rotating shaft 21, a driving member 22, a limiting block 23 and a second rope clamping block 24, the rotating shaft 21 is rotatably installed on the frame 10, specifically, the bottom surface of the frame 10 is provided with the installation base 12, and the rotating shaft 21 is rotatably installed on the installation base 12 through a bearing. One end of the driving member 22 is connected to the frame 10, and the other end of the driving member 22 is connected to the rotating shaft 21, in this embodiment, the driving member 22 is a torsion spring 22, and the rear end of the torsion spring 22 is inserted into the mounting seat 12 for fixing; correspondingly, the rotating shaft 21 is fixed with a fixing block 25, the front end of the torsion spring 22 is inserted into the fixing block 25 and fixed, and the torsion spring 22 generates torsion to urge the rotating shaft 21 to rotate towards one direction. The stopper 23 is disposed on the rotating shaft 21 and rotates with the rotating shaft 21. The second rope clamping block 24 is disposed on the rotating shaft 21 and moves closer to or away from the first rope clamping block 11 along with the rotation of the rotating shaft 21. This press from both sides rope mechanism 20 and press from both sides rope mechanism than other, need not motor or cylinder and drive the activity, can realize pressing from both sides the rope through the effort of driving piece to the structure is simpler, and practical, and the cost is reduced simultaneously, and efficiency is higher.
The limiting mechanism 30 is disposed on the frame 10 and located between the two rope clamping mechanisms 20, the limiting mechanism 30 includes a stopper 31, the stopper 31 abuts against the limiting block 23 to prevent the rotation of the rotating shaft 21, specifically, the inner end of the limiting block 23 has a hook 231, and the hook 231 is hooked on the bottom surface of the stopper 31 to be fixed, so that the rotating shaft 21 cannot rotate. The limiting mechanism 30 further includes a shaft 32, a base plate 33, a spring 34 and a guide rail 35, the rear end surface of the frame 10 is provided with a seat frame 13, the shaft 32 is movably disposed on the seat frame 13 in a back-and-forth manner, the front end of the shaft 32 is fixed to the base plate 33, and the base plate 33 drives the shaft 32 to move. The spring 34 is sleeved outside the shaft 32, a rear end of the spring 34 abuts against the seat frame 13, a front end of the spring 34 abuts against a surface of the base plate 33, and the spring 34 urges the base plate 33 to move forward and return. The guide rail 35 is disposed on the bottom surface of the substrate 33 and moves back and forth along with the substrate 33, the stopper 31 is fixed on the guide rail 35, and the guide rail 35 drives the stopper 31 to move back and forth.
The driving mechanism 40 drives the limiting mechanism 30 to move backwards, the stop block 31 moves backwards to be separated from the limiting block 23, at this time, the rotating shaft 21 is not constrained by force, the rotating shaft 21 rotates under the action force of the driving part 22, the second rope clamping block 24 rotates along with the rotating shaft 21 to be clamped with the first rope clamping block 11, and therefore the ear rope 50 between the two is clamped. In the present embodiment, the driving mechanism 40 is a rope pulling head 40, and the rope pulling head 40 is disposed on another machine frame. The rope pulling head 40 is located above the frame 10, the rope pulling head 40 moves back and forth above the frame 10 under the driving of an air cylinder (not shown), and the rope pulling head 40 drives the ear rope 50 to pull a certain length backwards.
The rear portion of the base plate 33 is bent upward to form an abutting portion 331, the rope pulling head 40 moves backward to contact with the abutting portion 331 to drive the base plate 33 to move backward, specifically, a sliding slot 101 for the rope pulling head to move forward and backward is concavely formed on the top surface of the frame 10, and the base plate 33 is located at the rear end of the sliding slot 101 and moves forward and backward at the rear end of the sliding slot 101. The rope pulling head 40 is a driving mechanism, and when the rope is skillfully pulled, the limiting mechanism 30 is driven to move backwards, so that the stop block 31 is separated from the limiting block 23, and the rotating shaft 21 is driven to rotate under the action force of the driving part 22 to clamp the thread. It compares traditional stay cord and presss from both sides the rope device, need use a plurality of motors or cylinder to drive and realize a plurality of actions, and this device only needs to use a cylinder of drive stay cord head 40 to realize stay cord and press from both sides the line, has practiced thrift the cost greatly, has reduced usage space, and production efficiency is higher.
A mounting plate 26 is fixed at the rear end of the rotating shaft 21, a screw 27 is arranged on the inner side of the mounting plate 26 and is abutted against a top block on an external cylinder to urge the rotating shaft 21 to rotate in the opposite direction for resetting, and the screw 27 drives the rotating shaft 21 to rotate in the opposite direction to realize resetting under the jacking action of the cylinder (not shown).
The working principle of the embodiment is detailed:
the middle position that the rope pulling head 40 drove the ear rope 50 moves backward, drive the ear rope 50 and pull backward, after the rope pulling head 40 moved backward certain distance, the rope pulling head 40 supported on the conflict portion 331 of base plate 33, thereby drive the base plate 33 and move backward, the dog 31 moves backward along with the base plate 33, after the ear rope 50 pulled to appointed length, just dog 31 and stopper 23 separation, pivot 21 rotated towards one direction under the torsion effect of torsional spring 22, second presss from both sides the rope piece 24 and rotates along with pivot 21, two second presss from both sides the rope piece 24 that lie in on two clamp rope mechanisms 20 and rotates and press from both sides tightly with the first rope piece 11 that corresponds, thereby press from both sides the both ends of ear rope 50 tightly. In the subsequent process, after the two ends of the lug rope 50 are welded on the mouth cover, the screw 27 drives the rotating shaft 21 to rotate in the opposite direction to realize reset under the jacking action of the cylinder, the pull rope head 40 resets, the stop block 31 resets under the action of the spring 34, the stop block 31 abuts against the two limiting blocks 23 for limiting, then the cylinder retracts and is not pushed against the screw 27, and the reset is completed.
The utility model discloses a design focus lies in: firstly, a limiting mechanism for limiting the rotation of the two rope clamping mechanisms is arranged between the two rope clamping mechanisms, the driving mechanism moves backwards to drive a stop block on the limiting mechanism to move backwards, after the lug rope is pulled to a specified length, the stop block is just separated from the limiting blocks on the two rope clamping mechanisms, rotating shafts on the two rope clamping mechanisms rotate towards one direction under the torsion action of a driving piece, the second rope clamping blocks rotate along with the rotating shafts, and the two second rope clamping blocks on the two rope clamping mechanisms rotate to be clamped with the corresponding first rope clamping blocks, so that the two ends of the lug rope are clamped; the utility model discloses reduce the use of cylinder or motor, realized automatic double-layered line equally, the structure is simplified, has reduced occupation space, has practiced thrift the cost, and production efficiency is higher. Secondly, the torsion spring is used for driving the rotating shaft to rotate so as to realize wire clamping, the torsion spring replaces a traditional cylinder or a motor to drive the wire clamping, the cost is lower, the occupied space is not occupied, and the structure is simplified. Moreover, the driving mechanism is a pull rope head, the pull rope is skillfully applied, the limiting mechanism is driven to move backwards, and when the length of the ear rope pulled out by the pull rope head reaches a specified length, the stop block is separated from the limiting block, so that the rotating shaft is driven to rotate under the action force of the driving piece to realize wire clamping; it compares traditional stay cord and presss from both sides the rope device, need use a plurality of motors or cylinder to drive and realize a plurality of actions, and the utility model discloses, only need use a cylinder of drive stay cord head can realize stay cord and press from both sides the line, practiced thrift the cost greatly, reduced the usage space, production efficiency is higher. Finally, through adopting the cross roller guide rail that structural performance is good with the guide rail, it has that rolling friction is little, stability can be good, mechanical energy consumption is little and the precision is high, fast, bearing capacity advantage such as big, thereby makes the utility model discloses life is longer.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides an automatic ear rope clamping device of gauze mask ear rope which characterized in that: the device comprises a frame, two rope clamping mechanisms respectively used for clamping two ends of an ear rope, a limiting mechanism used for limiting the rotation of the two rope clamping mechanisms and a driving mechanism used for driving the limiting mechanism to move backwards; two sides of the front end surface of the frame are respectively provided with a first rope clamping block; the two rope clamping mechanisms are respectively arranged on two sides of the rack, each rope clamping mechanism comprises a rotating shaft, a driving piece, a limiting block and a second rope clamping block, and the rotating shafts are rotatably arranged on the rack; one end of the driving piece is connected to the rack, the other end of the driving piece is connected to the rotating shaft, and the driving piece drives the rotating shaft to rotate; the limiting block is arranged on the rotating shaft and rotates along with the rotating shaft; the second rope clamping block is arranged on the rotating shaft and is close to or far away from the first rope clamping block along with the rotation of the rotating shaft; the limiting mechanism is arranged on the frame and positioned between the two rope clamping mechanisms, and comprises a stop block which is abutted against the limiting block to prevent the rotating shaft from rotating; the driving mechanism drives the limiting mechanism to move backwards, the stop block moves backwards to be separated from the limiting block, the rotating shaft rotates towards one direction under the acting force of the driving piece, and the second rope clamping block rotates along with the rotating shaft and is tightly clamped with the first rope clamping block.
2. The automatic ear clip cord device for mask ear cord according to claim 1, wherein: the surface of the first rope clamping block is provided with an arc concave surface for avoiding the ear rope clamping injury.
3. The automatic ear clip cord device for mask ear cord according to claim 1, wherein: the bottom surface of frame is provided with the mount pad, and above-mentioned pivot is rotationally installed on the mount pad through the bearing.
4. The automatic earring-clamping device for a mask earring according to claim 3, wherein: the driving piece is a torsion spring, and the rear end of the torsion spring is inserted into the mounting seat and fixed; correspondingly, a fixed block is fixed on the rotating shaft, and the front end of the torsion spring is inserted into the fixed block for fixing.
5. The automatic ear clip cord device for mask ear cord according to claim 1, wherein: the limiting mechanism also comprises a shaft body, a base plate, a spring and a guide rail, wherein a seat frame is arranged on the surface of the rear end of the rack, the shaft body is arranged on the seat frame in a manner of moving back and forth, and the front end of the shaft body is fixed with the base plate; the spring is sleeved outside the shaft body, the rear end of the spring abuts against the seat frame, the front end of the spring abuts against the surface of the substrate, and the spring enables the substrate to move forwards and reset; the guide rail is arranged on the bottom surface of the base plate and moves back and forth along with the base plate, the stop block is fixed on the guide rail, and the guide rail drives the stop block to move back and forth.
6. The automatic ear clip cord device for mask ear cord according to claim 5, wherein: the guide rail is a crossed roller guide rail with excellent structural performance.
7. The automatic ear clip cord device for mask ear cord according to claim 5, wherein: the driving mechanism is a pull rope head, the pull rope head is positioned above the rack, and the pull rope head moves back and forth above the rack under the driving of the cylinder; the later generation of the base plate is bent upwards to form a contact part, and the pull rope head moves backwards to contact with the contact part to drive the base plate to move backwards.
8. The automatic ear clip cord device for mask ear cord according to claim 7, wherein: the top surface of the frame is concavely provided with a sliding groove for the stay cord head to move back and forth, and the base plate is positioned at the rear end of the sliding groove and moves back and forth at the rear end of the sliding groove.
9. The automatic ear clip cord device for mask ear cord according to claim 1, wherein: the inner end of the limiting block is provided with a hook part which is fixed on the bottom surface of the stop block.
10. The automatic ear clip cord device for mask ear cord according to claim 1, wherein: the rear end of the rotating shaft is fixed with a mounting plate, and the inner side of the mounting plate is provided with a screw which is abutted against a top block on an external cylinder to drive the rotating shaft to rotate in the opposite direction and reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020906115.8U CN212306959U (en) | 2020-05-26 | 2020-05-26 | Automatic ear rope clamping device for mask ear rope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020906115.8U CN212306959U (en) | 2020-05-26 | 2020-05-26 | Automatic ear rope clamping device for mask ear rope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212306959U true CN212306959U (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020906115.8U Withdrawn - After Issue CN212306959U (en) | 2020-05-26 | 2020-05-26 | Automatic ear rope clamping device for mask ear rope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212306959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493437A (en) * | 2020-05-26 | 2020-08-07 | 长江智能科技(广东)股份有限公司 | Automatic ear rope clamping device for mask ear rope |
-
2020
- 2020-05-26 CN CN202020906115.8U patent/CN212306959U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493437A (en) * | 2020-05-26 | 2020-08-07 | 长江智能科技(广东)股份有限公司 | Automatic ear rope clamping device for mask ear rope |
| CN111493437B (en) * | 2020-05-26 | 2024-10-01 | 长江智能科技(广东)股份有限公司 | Automatic ear rope clamping device for mask ear rope |
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