CN114010261B - Negative pressure syringe with locking mechanical system - Google Patents
Negative pressure syringe with locking mechanical system Download PDFInfo
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- CN114010261B CN114010261B CN202111362974.0A CN202111362974A CN114010261B CN 114010261 B CN114010261 B CN 114010261B CN 202111362974 A CN202111362974 A CN 202111362974A CN 114010261 B CN114010261 B CN 114010261B
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- spring
- baffle
- push rod
- rod
- negative pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
Abstract
The invention relates to a negative pressure injector with a locking mechanism, which comprises a needle cylinder and a push rod, wherein the far end of the push rod is provided with a rubber plunger which is tightly matched with the needle cylinder; the locking mechanism comprises a spring baffle mechanism; the spring baffle mechanism comprises an ejection spring and a baffle, wherein one end of the ejection spring is fixedly connected with the push rod, and the other end of the ejection spring is fixedly connected with the baffle. According to the invention, the negative pressure injector can be automatically locked to keep negative pressure after reaching a preset position through the locking mechanism, and continuous control of medical staff is not required in the operation process, so that the operation is convenient; the invention further provides a scheme with a locking control mechanism, wherein the locking control mechanism can control the locking mechanism to be switched between a working state and a hidden state, and the applicability of the negative pressure injector can be further improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a negative pressure injector with a locking mechanism.
Background
Thrombosis is the condition in which the coagulation system is activated to varying degrees in physiological or pathological conditions and some components of the circulating blood form emboli in the blood, causing partial or complete blockage of the lumen of a blood vessel. The corresponding clinical events include acute myocardial infarction, ischemic stroke, pulmonary embolism, disseminated intravascular coagulation and the like, which often lead to serious consequences. In the prior art, after the percutaneous artificial thrombus aspiration is successfully punctured through a popliteal vein or a healthy femoral vein of a patient, a 12F catheter sheath is placed at the thrombus position, and then a 50ml syringe is used for directly aspirating thrombus.
When the injector is used for sucking thrombus, the existing injector needs a certain arm force of an operator to keep a negative pressure state, and the operation is difficult; the large-capacity injector is often large in suction force, so that an operator cannot keep the injector in a negative pressure state for a long time, and the operator is easily injured and has medical accidents.
In order to solve the problem of maintaining negative pressure, CN207545123U provides a negative pressure injector, which realizes the locking of negative pressure state by arranging a positioning pin on the injector cylinder and arranging a matching structure on the piston rod of the injector in cooperation with the positioning pin, however, in this way, the positioning pin needs to be arranged on the rear half part of the injector cylinder, resulting in the shortening of the effective stroke of the injector piston rod, the reduction of the actual effective capacity of the injector, and the positioning operation of the positioning pin needs to be realized in combination with the rotation of the piston rod, so that the doctor is difficult to realize the one-handed operation, which adds inconvenience to the operation; CN213249512U also provides a negative pressure syringe, which is locked by the rotation of the movable stopper and the cooperation of the baffle in the piston rod by setting the rotatable movable stopper at the tail end of the syringe barrel, and this kind of locking mode not only needs the barrel and the piston rod to be redesigned, but also needs to be realized by combining the rotation of the movable stopper, so that the doctor can hardly realize the one-handed operation, and the inconvenience is increased for the operation.
Disclosure of Invention
Based on the shortcomings of the prior art, it is an object of the present invention to provide a negative pressure syringe with a locking mechanism that is safer, more effective and more convenient to operate.
The invention provides a negative pressure injector with a locking mechanism, which comprises a needle cylinder and a push rod, wherein the far end of the push rod is provided with a rubber plunger which is tightly matched with the needle cylinder; a locking mechanism is arranged in the push rod, and the locking mechanism can lock the push rod of the injector at a preset negative pressure position; the locking mechanism comprises a spring baffle mechanism; the spring baffle mechanism comprises an ejection spring and a baffle, wherein one end of the ejection spring is fixedly connected with the push rod, and the other end of the ejection spring is fixedly connected with the baffle.
Furthermore, the push rod is cylindrical, a cavity is formed in the push rod, the spring baffle mechanism is arranged in the cavity, and the baffle can slide along the cavity.
Further, when the ejection spring is fully released, the ejection spring is fully received in the cavity and at least one-half of the flapper is received in the cavity.
When the baffle is positioned in the syringe, the baffle is limited by the inner surface of the syringe, the ejection spring is in a compressed state, and when the baffle is separated from the inner surface of the syringe in the process that the push rod is pulled out of the syringe, the ejection spring ejects the baffle, and at the moment, the baffle is clamped on the edge of the syringe, and the injector is locked; when the push rod is pushed back, the ejection spring retracts under the extrusion action of the baffle and the needle cylinder, the baffle is contacted with the inside of the needle cylinder again, and the injector is unlocked.
Furthermore, a plurality of spring baffle mechanisms are arranged along the length direction of the push rod, and the push rod can be locked at different positions by the spring baffle mechanisms; the needle cylinder is provided with scale marks.
The limiting positions of the spring baffle mechanisms can be clearly indicated through the scale marks, and the spring baffle mechanisms and the scale marks are matched to realize multi-section and accurate limiting, so that the requirement of negative pressure required by different operations is met.
Furthermore, a plurality of groups of spring baffle mechanisms are symmetrically arranged in the circumferential direction of the push rod.
Further, the negative pressure injector further comprises a locking control mechanism, and the locking control mechanism can control the locking mechanism;
furthermore, a locking control mechanism is arranged in the push rod and comprises a control switch, an operating lever and a buffer spring; one end of the operating rod, which is close to the rubber plunger, is provided with a limiting boss and an insertion rod, and the buffering spring is sleeved on the periphery of the insertion rod and is limited by the limiting boss; the control switch can control the expansion and contraction of the operating lever and the buffer spring; a limiting groove matched with the insertion rod is formed in the baffle of the spring baffle mechanism;
further, the spring damper mechanism is arranged at a substantially perpendicular angle to the operating lever;
further, the control switch comprises a button, a fixing device and a sliding and rotating device; the fixing device is fixedly arranged at the end part of the push rod, the button is sleeved in the fixing device, the top end of the button extends out of the fixing device, the periphery of the sliding rotating device is provided with a longitudinal protruding rod, the fixing device is provided with a surface concave surface matched with the longitudinal protruding rod, and the bottom of the button, the bottom of the fixing device and the top of the sliding rotating device are all provided with tooth-shaped inclined surface structures;
further, when the button is pressed down, the button pushes the sliding rotating device downwards, a protruding rod on the sliding rotating device pushes the bottom toothed slope structure of the fixing device, the operating rod drives the inserting rod to push the inserting rod downwards into a limiting groove of a baffle in the spring baffle mechanism, the baffle is clamped, the buffer spring is in a compressed state, the button is pressed down again, the protruding rod of the sliding rotating device is rebounded to the concave surface of the fixing device, the buffer spring is released, the operating rod drives the inserting rod to be pulled out of the limiting groove, the ejecting spring in the spring baffle mechanism ejects the baffle at the moment, the baffle is clamped at the edge of the needle cylinder, and the injector is locked.
By adopting the technical scheme of the invention, the negative pressure injector can be automatically locked to keep negative pressure after reaching the preset position through the arrangement of the locking mechanism, and the continuous control of medical personnel is not needed in the operation process, so that the operation is convenient; the negative pressure injector is simple to operate, can be operated by a single person and a single hand, saves time and labor and is convenient to operate; in addition, the invention can realize effective locking only through the spring and the baffle, and has simple and convenient manufacture and low cost; furthermore, the negative pressure injector can be accurately limited in multiple sections by arranging a plurality of spring baffle mechanisms, so that negative pressure required by different operations is met.
The adoption of the scheme with the locking control mechanism can further improve the applicability of the negative pressure injector. The locking control mechanism can control the locking mechanism to switch between a working state and a hidden state, and under the hidden state, even if the push rod is completely pulled out of the syringe, the locking control mechanism can still control the locking mechanism to be completely hidden in the push rod, so that the subsequent pushing operation is smooth without any obstacle; the negative pressure injector can be in a working state and a hidden state through the button operation of the locking control mechanism, so that the negative pressure injector has a locking function, can adapt to the use environment of a conventional injector needing smooth and barrier-free operation, greatly improves the applicability of the negative pressure injector, and can be applied to wider environments; in addition, compared with the common injector, the locking mechanism only changes the push rod part without specially designing the syringe, the conventional syringe can be matched, and the production and modification cost of the injector is lower.
Drawings
FIG. 1 is a schematic view of the overall structure of a negative pressure syringe according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a push rod according to a first embodiment of the present invention;
FIG. 3 is another view of the putter structure according to the first embodiment of the present invention;
FIG. 4 is a schematic diagram of a baffle structure according to a first embodiment of the present invention;
FIG. 5 is a schematic illustration of a locking process of the negative pressure syringe according to the first embodiment of the present invention;
FIG. 6 is a schematic view of the overall structure of the negative pressure syringe according to the second embodiment of the present invention;
FIG. 7 is a schematic view of the overall structure of a push rod according to a second embodiment of the present invention;
FIG. 8 is a front view of a spring retainer mechanism according to a second embodiment of the present invention;
FIG. 9 is a top view of a spring retainer mechanism according to a second embodiment of the present invention;
FIG. 10 is a schematic view of a distal end of a joystick in accordance with a second embodiment of the present invention;
fig. 11 is a schematic structural diagram of a control switch according to a second embodiment of the present invention;
FIG. 12 is a diagram showing the parts of the control switch according to the second embodiment of the present invention;
FIG. 13 is a schematic diagram of a variation process of the control switch according to the second embodiment of the present invention;
FIG. 14 is a schematic view showing a change process of the joystick and the buffer spring according to the second embodiment of the present invention;
fig. 15 is a schematic view of the locking process of the negative pressure syringe according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
Example one
Fig. 1-5 show an embodiment of the invention, a negative pressure injector with a locking mechanism, which comprises a needle cylinder 1 and a push rod 2, wherein the far end of the push rod is provided with a rubber plunger 2-1 which is tightly matched with the needle cylinder; a locking mechanism is arranged in the push rod 2, and can lock the push rod of the injector at a preset negative pressure position; the locking mechanism comprises a spring baffle mechanism 2-5; the spring baffle mechanism comprises an ejection spring 2-5-1 and a baffle 2-5-2, one end of the ejection spring is fixedly connected with the push rod, and the other end of the ejection spring is fixedly connected with the baffle; the push rod is cylindrical, a cavity is formed in the push rod, the spring baffle mechanisms 2-5 are arranged in the cavity, and the baffles can slide along the cavity.
Further, when the ejection spring is fully released, the ejection spring is fully received in the cavity and at least one-half of the flapper is received in the cavity. In particular, in the solution of fig. 4, when the ejection spring is completely released, the ejection spring is completely housed in the cavity and at least two thirds of the shutter are housed in the cavity.
When the baffle 2-5-2 is positioned in the syringe 1, the baffle 2-5-2 is limited by the inner surface of the syringe, the ejection spring 2-5-1 is in a compressed state, when the baffle 2-5-2 is separated from the inner surface of the syringe 1 in the process that the push rod 2 is pulled out of the syringe 1, the ejection spring 2-5-1 ejects the baffle 2-5-2, at the moment, the baffle 2-5-2 is clamped at the edge of the syringe 1, and the injector is locked; when the push rod 2 is pushed back, the ejection spring 2-5-21 retracts due to the pressing action of the baffle plate 2-5-2 and the needle cylinder 1, the baffle plate 2-5-2 is contacted with the inside of the needle cylinder 1 again, and the injector is unlocked.
In fig. 1-5, 6 spring baffle mechanisms are arranged along the length direction of the push rod, and the 6 spring baffle mechanisms can lock the push rod at different positions; the needle cylinder is provided with scale marks.
The limiting positions of the spring baffle mechanisms can be clearly indicated through the scale marks, and the spring baffle mechanisms and the scale marks are matched to realize multi-section and accurate limiting, so that the requirement of negative pressure required by different operations is met.
As shown in fig. 5, wherein the syringe 1 has a capacity of 60cc and has 10, 20, 30, 40, 50, 60 scale marks on the surface; the push rod 2 is provided with 6 spring baffle mechanisms which respectively correspond to the scale marks of 10, 20, 30, 40, 50 and 60 on the surface of the needle cylinder and can lock the injector at any scale position in the process of stretching the push rod 2.
Example two
6-15 illustrate a second embodiment of the present invention wherein the negative pressure injector further comprises a lock control mechanism capable of controlling the lock mechanism; the locking control mechanism is arranged in the push rod and comprises a control switch 2-2, an operating rod 2-3 and a buffer spring 2-4; one end of the operating rod 2-3, which is close to the rubber plunger 2-1, is provided with a limiting boss 2-3-1 and an insertion rod 2-3-2, and a buffer spring 2-4 is sleeved on the periphery of the insertion rod 2-3-2 and is limited by the limiting boss 2-3-1; the control switch 2-2 can control the expansion and contraction of the operating rod 2-3 and the buffer spring 2-4; a limiting groove 2-5-2-1 matched with the inserting rod 2-3-2 is arranged on a baffle 2-5-2 of the spring baffle mechanism 2-5; the spring baffle mechanism 2-5 is arranged at a substantially vertical angle to the operating lever;
specifically, as shown in fig. 11-15, the control switch 2-2 includes a button 2-2-1, a fixing device 2-2-2, and a sliding and rotating device 2-2-3; the fixing device 2-2-2 is fixedly arranged at the end part of the push rod 2, the button is sleeved in the fixing device, the top end of the button extends out of the fixing device, the periphery of the sliding rotating device is provided with a longitudinal protruding rod 2-2-3-1, the fixing device is provided with a surface concave surface 2-2-2-2 matched with the longitudinal protruding rod 2-2-3-1, and the bottom of the button, the bottom of the fixing device and the top of the sliding rotating device are all provided with tooth-shaped inclined surface structures; when the button 2-2-1 is pressed, the button pushes the sliding rotating device downwards until the protruding rod 2-2-3-1 of the sliding rotating device is lower than the bottom toothed inclined plane of the fixing device, then the sliding rotating device rotates towards the left upper part along the bottom toothed inclined plane of the fixing device under the upward acting force provided by the buffer spring 2-4, the protruding rod 2-2-3-1 on the sliding rotating device 2-2-3 pushes the bottom toothed inclined plane structure 2-2-1 of the fixing device 2-2-2, at the moment, the operating lever 2-3 drives the inserting rod 2-3-2 to push downwards into the limiting groove 2-5-2-1 of the baffle 2-5-2 in the spring baffle mechanism 2-5, and the baffle 2-5-2 is clamped, the buffer spring 2-4 is in a compressed state, the button 2-2-1 is pressed again, the button presses the sliding rotating device downwards, the protruding rod 2-2-3-1 of the sliding rotating device is separated from the bottom tooth-shaped inclined plane of the fixing device, then the sliding rotating device rotates towards the upper left along the bottom tooth-shaped inclined plane of the fixing device again under the upward acting force provided by the buffer spring 2-4, then the protruding rod 2-2-3-1 of the sliding rotating device 2-2-3 is rebounded to the surface concave surface 2-2-2-2 of the fixing device 2-2-2, the buffer spring 2-4 is released, the operating rod 2-3 drives the inserting rod 2-3-2 to be pulled out from the limiting groove 2-5-2-1, at the moment, the ejection spring 2-5-1 in the spring baffle mechanism 2-5 ejects the baffle 2-5-2 to be clamped on the edge of the syringe 1, and the syringe is locked.
In addition, the control switch can also adopt other pressing telescopic structures.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (4)
1. The utility model provides a negative pressure syringe with locking mechanical system, includes cylinder (1) and push rod (2), push rod (2) distal end is provided with rubber plunger (2-1) with the cylinder closely cooperates, its characterized in that: a locking mechanism is arranged in the push rod (2), and can lock the push rod at a preset negative pressure position; the locking mechanism comprises a spring baffle mechanism (2-5); the spring baffle mechanism (2-5) comprises an ejection spring (2-5-1) and a baffle (2-5-2), one end of the ejection spring (2-5-1) is fixedly connected with the push rod (2), and the other end of the ejection spring is fixedly connected with the baffle (2-5-2);
the push rod (2) is cylindrical, a concave cavity is formed in the push rod (2), the spring baffle mechanism (2-5) is arranged in the concave cavity, and the baffle (2-5-2) can slide along the concave cavity;
when the ejection spring (2-5-1) is completely released, the ejection spring (2-5-1) is completely accommodated in the cavity, and at least one half of the baffle plate (2-5-2) is accommodated in the cavity;
a plurality of spring baffle mechanisms (2-5) are arranged along the length direction of the push rod (2), and the push rod can be locked at different positions by the spring baffle mechanisms (2-5); the needle cylinder is provided with scale marks;
the negative pressure injector further comprises a locking control mechanism, and the locking control mechanism can control the locking mechanism;
the locking control mechanism is arranged in the push rod and comprises a control switch (2-2), an operating rod (2-3) and a buffer spring (2-4); one end of the operating rod (2-3), which is close to the rubber plunger (2-1), is provided with a limiting boss (2-3-1) and an insertion rod (2-3-2), and a buffer spring (2-4) is sleeved on the periphery of the insertion rod (2-3-2) and is limited by the limiting boss (2-3-1); the control switch (2-2) can control the control lever (2-3) and the buffer spring (2-4) to stretch; a limiting groove (2-5-2-1) matched with the inserting rod (2-3-2) is arranged on a baffle (2-5-2) of the spring baffle mechanism (2-5);
the control switch (2-2) comprises a button (2-2-1), a fixing device (2-2-2) and a sliding rotating device (2-2-3); the fixing device (2-2-2) is fixedly arranged at the end part of the push rod (2), the button is sleeved in the fixing device, the top end of the button extends out of the fixing device, the periphery of the sliding rotating device is provided with a longitudinal protruding rod (2-2-3-1), the fixing device is provided with a surface concave surface (2-2-2-2) matched with the longitudinal protruding rod (2-2-3-1), and the bottom of the button, the bottom of the fixing device and the top of the sliding rotating device are all provided with tooth-shaped inclined surface structures.
2. The negative pressure syringe of claim 1, wherein the additional technical features are as follows: and a plurality of groups of spring baffle mechanisms (2-5) are symmetrically arranged in the circumferential direction of the push rod.
3. The negative pressure injector of claim 1, wherein the additional technical features are as follows: the spring retainer mechanism (2-5) is arranged at a substantially perpendicular angle to the operating lever.
4. The negative pressure syringe of claim 1, wherein the additional technical features are as follows: when the button (2-2-1) is pressed down, the button pushes the sliding rotating device (2-2-3) downwards, the protruding rod (2-2-3-1) on the sliding rotating device (2-2-3) is pushed to the bottom tooth-shaped inclined plane structure (2-2-2-1) of the fixing device (2-2-2), at the moment, the operating rod (2-3) drives the inserting rod (2-3-2) to push downwards to the limiting groove (2-5-2-1) of the baffle (2-5-2) in the spring baffle mechanism (2-5), the baffle (2-5-2) is clamped, the buffer spring (2-4) is in a compressed state, the button (2-2-1) is pressed down again, and the protruding rod (2-2-3-1) of the sliding rotating device (2-2-3) is pressed down ) The elastic stopper is rebounded to the concave surface (2-2-2-2) of the fixing device (2-2-2), the buffer spring (2-4) is released, the operating rod (2-3) drives the inserting rod (2-3-2) to be pulled out of the limiting groove (2-5-2-1), at the moment, the ejecting spring (2-5-1) in the spring stopper mechanism (2-5) ejects the stopper (2-5-2) to be clamped on the edge of the needle cylinder (1), and the injector is locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111362974.0A CN114010261B (en) | 2021-11-17 | 2021-11-17 | Negative pressure syringe with locking mechanical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111362974.0A CN114010261B (en) | 2021-11-17 | 2021-11-17 | Negative pressure syringe with locking mechanical system |
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| Publication Number | Publication Date |
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| CN114010261A CN114010261A (en) | 2022-02-08 |
| CN114010261B true CN114010261B (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111362974.0A Active CN114010261B (en) | 2021-11-17 | 2021-11-17 | Negative pressure syringe with locking mechanical system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203123203U (en) * | 2013-02-04 | 2013-08-14 | 中国人民解放军第三军医大学第一附属医院 | Automatic limiting injector |
| CN109200396A (en) * | 2018-07-13 | 2019-01-15 | 中国人民解放军陆军军医大学第附属医院 | Needleless injection attachment device |
| CN208372186U (en) * | 2017-07-14 | 2019-01-15 | 南京法迈特科技发展有限公司 | A kind of vacuum extractor |
| CN211049852U (en) * | 2019-10-16 | 2020-07-21 | 徐州医科大学附属医院 | Sterile negative pressure syringe |
| CN211272683U (en) * | 2019-12-09 | 2020-08-18 | 中国医学科学院北京协和医院 | Pressure-adjustable negative pressure drainage device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014160613A1 (en) * | 2013-03-29 | 2014-10-02 | Silk Road Medical, Inc, | Systems and methods for aspirating from a body lumen |
-
2021
- 2021-11-17 CN CN202111362974.0A patent/CN114010261B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203123203U (en) * | 2013-02-04 | 2013-08-14 | 中国人民解放军第三军医大学第一附属医院 | Automatic limiting injector |
| CN208372186U (en) * | 2017-07-14 | 2019-01-15 | 南京法迈特科技发展有限公司 | A kind of vacuum extractor |
| CN109200396A (en) * | 2018-07-13 | 2019-01-15 | 中国人民解放军陆军军医大学第附属医院 | Needleless injection attachment device |
| CN211049852U (en) * | 2019-10-16 | 2020-07-21 | 徐州医科大学附属医院 | Sterile negative pressure syringe |
| CN211272683U (en) * | 2019-12-09 | 2020-08-18 | 中国医学科学院北京协和医院 | Pressure-adjustable negative pressure drainage device |
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| Publication number | Publication date |
|---|---|
| CN114010261A (en) | 2022-02-08 |
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