CN108272478B - Implanter for medical devices - Google Patents
Implanter for medical devices Download PDFInfo
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- CN108272478B CN108272478B CN201710007522.8A CN201710007522A CN108272478B CN 108272478 B CN108272478 B CN 108272478B CN 201710007522 A CN201710007522 A CN 201710007522A CN 108272478 B CN108272478 B CN 108272478B
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- rod
- ratchet
- shaft
- clamping
- bolt
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
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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
- A61B2017/00743—Type of operation; Specification of treatment sites
Abstract
The invention discloses an implanter suitable for a medical device, which comprises a shaft, a rod, a bolt and a clamping mechanism, wherein the shaft comprises a shaft body and a joint head part arranged at one end of the shaft body, one end of the rod is adjacent to the inner side of the joint head part, the bolt is arranged at the end of the rod and penetrates through the joint head part to be connected with the medical device, the clamping mechanism is movably arranged at the other end of the shaft body and is far away from the joint head part, and the clamping mechanism selectively limits or allows the angular displacement of the rod relative to the shaft body. When the rod is forced to bend relative to the shaft, the end of the rod prizes the bolt, so that the medical device is driven by the bolt to tightly abut against one outer side of the joint head. The invention can be firmly connected with a medical device, and has simple structure and easy cleaning.
Description
Technical Field
The present invention relates to surgical tools, and more particularly, to an implanter for medical devices.
Background
In surgical operations, some surgical tools are usually used to connect a medical device (such as an implant, an implant trial or a surgical instrument) to assist a user in operating the medical device more flexibly, and since the medical device and the surgical tool are detachably connected, in order to avoid accidental detachment during the surgical operation, it is common to use an auxiliary mechanism to ensure the medical device and the surgical tool are firmly combined.
The prior auxiliary mechanism is composed of a complex connecting rod mechanism, and the structure has a plurality of connecting joints, small elements, deep holes and inner grooves, so that the cleaning and sterilization of the surgical tool become very difficult, and because the elements frequently contact with blood, soft tissues or bones during each surgical operation, the risk of postoperative infection of patients is greatly increased if the elements cannot be thoroughly cleaned and sterilized.
Some surgical tools are designed to be partially disassembled for cleaning, but such designs are more complex and more fragile, which may cause accidents and delays in the surgical procedure, and the complicated cleaning procedure increases the burden on medical personnel and the operating cost of the hospital.
Disclosure of Invention
Therefore, the present invention is directed to an implanter for medical devices, which can be stably connected to a medical device, and has a simple structure and easy cleaning, so as to solve the above problems.
To achieve the above object, the present invention discloses an implanter for medical devices, comprising
A shaft member including a shaft body and a joint head portion disposed at one end of the shaft body;
a rod movably arranged on the shaft body, wherein one end of the rod is adjacent to the inner side of the joint head part;
a bolt mounted to the end of the rod and passing through the engagement head to connect the medical device; and
the clamping mechanism is movably arranged at the other end of the shaft body and is far away from the joint head part, and the clamping mechanism selectively limits or allows the angular displacement of the rod piece relative to the shaft body;
when the rod is stressed and bent relative to the shaft body, the end of the rod prizes the bolt, so that the medical device is driven by the bolt to tightly abut against one outer side of the joint head.
The implanting device further comprises a first ratchet arranged at the other end of the rod piece, the clamping mechanism comprises a clamping body and a second ratchet, the second ratchet is arranged on one side of the clamping body and corresponds to the first ratchet, and the first ratchet is used for clamping the second ratchet so as to limit the angular displacement of the rod piece relative to the shaft body.
The first ratchet includes multiple first engaging teeth, a first engaging hook and a first ratchet body, the multiple first engaging teeth and the first engaging hook protrude from the first ratchet body, the first engaging hook is disposed on one side of the multiple first engaging teeth, a height of each first engaging tooth is smaller than a height of the first engaging hook, and the second ratchet is selectively engaged with the corresponding first engaging tooth or the first engaging hook to limit the angular displacement of the rod relative to the shaft.
When the second ratchet is clamped with the corresponding first clamping tooth, the rod piece is located at a locking position, when the second ratchet is clamped with the first clamping hook, the rod piece is located at a unlocking position, and when the second ratchet is separated from the first ratchet in a clamping manner, the rod piece is located at a disassembling position.
The shaft body and the rod piece are respectively in a straight rod shape, and one head of the bolt is accommodated in the rod piece and can rotate along with the shaft body and the rod piece.
The shaft body is bent, the implanting device further comprises a screw driver, wherein a sleeving part is formed at one end of the bolt and is used for being connected with the screw driver, and the screw driver can drive the bolt to rotate.
Wherein, this member is for can setting up on this axis body with dismantling.
Wherein, the end of the rod piece is formed with a gap which is adjacent to the joint head, and the bolt comprises a neck part which is used for clamping the gap on the rod piece.
The bolt comprises a connecting part, and the connecting part is connected with the medical device in a thread, clamping bolt or dovetail way.
Wherein the medical device is an implant, an implant trial, or a surgical instrument.
The invention utilizes the rod piece to pry the bolt, so as to drive the medical device to tightly abut against the outer side of the joint head part; furthermore, the invention also utilizes the clamping mechanism to limit the angular displacement of the rod piece relative to the shaft body so as to ensure that the medical device is always tightly pressed against the outer side of the joint head, thereby effectively avoiding the accidental loosening in the operation and improving the operation reliability and the operation accuracy. In addition, compared with the existing design, the implanter has the advantages of simple structure, convenient operation and easy cleaning and sterilization, thereby effectively reducing the burden of medical personnel and reducing the risk of postoperative infection of patients.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is an external view of an implanter according to a first embodiment of the invention.
Figure 2 is an exploded view of a first embodiment of an implanter according to the present invention.
Figure 3 is a schematic view of the implanter in a unlocked state in accordance with the first embodiment of the invention.
Figure 4 is a schematic view of the implanter in a locked condition according to the first embodiment of the invention.
Fig. 5 is a schematic view of the implanter in a disassembled state according to the first embodiment of the invention.
Fig. 6 is an external view of an implanter in accordance with a second embodiment of the invention.
Figure 7 is an exploded view of a second embodiment implanter of the invention.
FIG. 8 is a schematic view of an implanter in a locked state in accordance with a second embodiment of the invention.
Fig. 9 is a schematic view of an implanter in a locked state according to a second embodiment of the invention.
Fig. 10 is a schematic view of a second embodiment of the present invention in a disassembled state.
Wherein, the reference numbers:
1. 1' implantation device
10. 10' shaft
100. 100' shaft body
101 engagement head
102 container
103 bolt
104 avoidance zone
105 pin joint
11. 11' rod
110 gap
12. 12' bolt
120 neck part
121 connection part
123. 123' head
124 socket joint part
13. 13' engaging mechanism
130. 130' clamping body
131 second ratchet
132 chute
14 handle
15 plate
16 first ratchet
160 first engaging tooth
161 first hook
162 first ratchet body
17 elastic member
180 screwdriver
2 medical device
Detailed Description
Referring to fig. 1 and 2, an implanter 1 according to a first embodiment of the present disclosure is used to connect a medical device 2, the implanter 1 includes a shaft 10, a rod 11, a bolt 12, a locking mechanism 13, a handle 14 and a plate 15, the shaft 10 includes a shaft 100 and a joint head 101, and the joint head 101 is disposed at one end of the shaft 100.
The rod 11 is movably disposed on the shaft 100, one end of the rod 11 is adjacent to an inner side of the joint head 101, the bolt 12 is mounted on the end of the rod 11 and passes through the joint head 101 to connect the medical device 2, the engaging mechanism 13 is movably disposed at the other end of the shaft 100, that is, the engaging mechanism 13 is disposed at an end of the shaft 100 far away from the joint head 101, and the engaging mechanism 13 selectively limits or allows an angular displacement of the rod 11 relative to the shaft 100. In this embodiment, a receiving groove 102 is formed on one side of the shaft 100 for receiving the rod 11 and the engaging mechanism 13, and the rod 11 is detachably disposed in the receiving groove 102. However, in other embodiments, the rod 11 and the shaft 100 may be arranged side by side. The handle 14 extends from the other end of the shaft 100, and the plate 15 is connected to the handle 14, so that a user can easily manipulate and apply force to the handle 14 and the plate 15 to place the medical device 2 at a surgical site. In this embodiment, the implant 1 may be a hip cup implant and the medical device 2 may be a hip cup implant, while in other embodiments the medical device 2 may be other surgical devices (e.g., implants, implant trials, or surgical instruments).
In this embodiment, the implanter 1 further comprises a first ratchet 16 disposed at the other end of the rod 11, the engaging structure 13 comprises an engaging body 130 and a second ratchet 131, the engaging body 130 is slidably connected to the shaft 100, for example, the engaging body 130 can be slidably connected to the shaft 100 by the cooperation of a pin and a sliding slot, the second ratchet 131 is disposed at one side of the engaging mechanism 130 and corresponds to the first ratchet 16, and the first ratchet 16 selectively engages with or disengages from the second ratchet 131 to limit or allow the angular displacement of the rod 11 relative to the shaft 100. However, in other embodiments, the first ratchet 16 and the second ratchet 131 may be replaced by other elements (such as a cam, a gear, or a toggle mechanism).
Furthermore, the first ratchet 16 includes a plurality of first engaging teeth 160, a first engaging hook 161 and a first ratchet body 162, the first engaging teeth 160 and the first engaging hook 161 protrude from the first ratchet body 162, the first engaging hook 161 is located on one side of the first engaging teeth 160, and a height of each first engaging tooth 160 is smaller than a height of the first engaging hook 161.
Referring to fig. 2, in this embodiment, the shaft 100 and the rod 11 are respectively in a straight rod shape, a head 123 of the bolt 12 is accommodated in the rod 11 and can rotate along with the shaft 100 and the rod 11, a notch 110 is formed on the end of the rod 11, the notch 110 is adjacent to the joint head 101, and the bolt 12 includes a neck 120 for engaging with the notch 110 and a connection portion 121 for connecting the medical device 2. In this embodiment, the connection portion 121 is connected to the medical device 2 by a screw connection, but in other embodiments, the connection portion 121 may be connected to the medical device 2 indirectly or directly by a bayonet or dovetail connection.
Referring to fig. 3 to 5, fig. 3 to 5 are schematic views of an implanter 1 in a release state, a locking state and a disassembly state according to a first embodiment of the present disclosure, in which the shaft 10 further includes two bolts 103 disposed at the other end of the shaft 100, two sliding slots 132 are correspondingly formed on the engaging body 130, and the two bolts 103 respectively pass through the two sliding slots 132, so that the engaging mechanism 13 can slide relative to the shaft 100 by the cooperation of the bolts 103 and the sliding slots 132, but the sliding configuration of the present disclosure is not limited to this embodiment.
In addition, the implanter 1 further includes an elastic member 17 disposed between the engaging structure 13 and the shaft 100 for driving the engaging structure 13 to elastically return to engage with the first ratchet 16, and an avoiding region 104 is formed on the other side of the shaft 100, the avoiding region 104 is disposed opposite to the receiving groove 102 and is used for avoiding interference between the rod 11 and the shaft 100.
When the medical device 2 is to be connected to the implanter 1, the user may operate the engaging body 130 to slide relative to the shaft 100 to disengage the second ratchet 131 from the first ratchet 16, thereby allowing the angular displacement of the rod 11 relative to the shaft 100, so that the rod 11 may be adjusted to a release position. When the engaging body 130 is released, the elastic member 17 drives the engaging body 130 to return, so that the second ratchet 131 engages with the first engaging hook 161 to position the rod 11 at the release position as shown in fig. 3, and at this time, the medical device 2 can be connected to the implanter 1 via the connecting portion 121 of the bolt 12, for example, the connecting portion 121 is pre-locked to a bolt hole of the medical device 2.
After the medical device 2 is connected to the implanter 1, the user can then operate the rod 11 to bend the shaft 100 from the unlocking position shown in fig. 3 to the locking position shown in fig. 4, in which the end of the rod 11 will gradually pry the bolt 12, so that the medical device 2 can be driven by the bolt 12 to tightly engage an outer side of the head 101. Meanwhile, the user can operate the engaging body 130 to drive the second ratchet 131 to disengage from the first engaging hook 161, and engage the second ratchet 131 with the corresponding first engaging tooth 160 to position the rod 11 at the locking position, thereby ensuring that the medical device 2 is always tightly abutted against the outer side of the head 101. However, in other embodiments, the rod 11 can be positioned at any engagement position between the release position shown in fig. 3 and the lock position shown in fig. 4 by engaging the second ratchet 131 with the other first engaging teeth 160.
When the medical device 2 is to be separated from the implanting apparatus 1, the user can operate the engaging body 130 to slide relative to the shaft 100, so as to disengage the second ratchet 131 from the first engaging tooth 160, and further allow the angular displacement of the rod 11 relative to the shaft 100, at this time, the rod 11, which is bent by force, is reset from the locking position shown in fig. 4 to the unlocking position shown in fig. 3, so that the first engaging hook 161 contacts the second ratchet 131, and then, when the engaging body 130 is released, the elastic member 17 drives the engaging body 130 to engage the second ratchet 131 with the first engaging hook 161. When the lever 11 is in the unlocked position, the lever 11 no longer pries the bolt 12, so that the medical device 2 is no longer tightened against the outside of the engagement end 101, so that the medical device 2 can be easily detached from the implanter 1.
In addition, when the rod 11 is to be detached from the shaft 100 for cleaning or sterilization, the user can operate the engaging body 130 to slide relative to the shaft 100, such that the second ratchet 131 is completely disengaged from the first ratchet 16, and at this time, the rod 11 moves to a detaching position as shown in fig. 5, such that the rod 11 and the bolt 12 can be easily removed from the receiving groove 102.
Since the height of each first engaging tooth 160 is less than the height of the first engaging hook 161, when the engaging body 130 is operated to slide a predetermined distance to disengage the second ratchet 131 from the first engaging tooth 160, the second ratchet 131 will contact the first engaging hook 161 first, so that the rod 11 will not move suddenly to the disassembled position, and the two-stage operation method can prevent the rod 11 from being separated from the shaft 100 accidentally.
Referring to fig. 6 and 7, the difference between the second embodiment of the implanter 1 'and the first embodiment of the implanter 1 is that the implanter 1' further comprises a screwdriver 180 for driving the bolt 12 ', a head 123' of the bolt 12 'having a socket 124 formed thereon for engaging with the screwdriver 180, while in other embodiments, the bolt 12' may be driven by a bevel gear or other transmission element. A shaft body 100 ' is curved, a shaft 10 ' includes a pivot pin 105 disposed at the other end of the shaft body 100 ', and a fastening body 130 ' is rotatably connected to the shaft body 100 ' via the pivot pin 105 to limit or allow an angular displacement of the rod 11 ' relative to the shaft body 100 '.
Referring to fig. 8-10, fig. 8-10 are schematic views of an implanter 1 'in a release state, a locking state and a disassembly state according to a second embodiment of the invention, when a medical device 2 is to be connected to the implanter 1', a user can operate the engaging body 130 'of the engaging and locking mechanism 13' to rotate relative to the shaft 100 'to allow the angular displacement of the rod 11' relative to the shaft 100 'so that the rod 11' can be adjusted to a release position as shown in fig. 8, at which time the medical device 2 can be connected to the implanter 1 'by the cooperation of the screwdriver 180 and the bolt 12'.
After the medical device 2 is connected to the implanter 1 ', the user can manipulate the lever 11 ' to bend under force relative to the shaft 100 ' and move from the unlocked position shown in fig. 8 to a locked position shown in fig. 9, in which process one end of the lever 11 ' gradually pries the bolt 12 ' so that the medical device 2 is tightened against the outside of the engagement head 101. Then, the user can operate the engaging body 130 'to rotationally drive the second ratchet 131 to disengage from the first engaging hook 161 and engage with the corresponding first engaging tooth 160, so as to position the rod 11' in the locking position, thereby securing the medical device 2 against the outside of the engaging head 101.
When the medical device 2 is to be separated from the implanter 1 ', the user can operate the engaging body 130' to rotate relative to the shaft 100 'to disengage the second ratchet 131 from the first engaging tooth 160, thereby allowing the angular displacement of the rod 11' relative to the shaft 100 ', and the rod 11' subjected to bending is returned from the locking position shown in fig. 9 to the unlocking position shown in fig. 8, such that the first engaging hook 161 contacts the second ratchet 131. Then, when the engaging body 130 'is released, the elastic element 17 drives the engaging body 130' to reset and engage with the first engaging hook 161. When the lever 11 'is in the unlocked position, the lever 11' no longer pries the bolt 12 'so that the medical device 2 is no longer tightened against the outside of the engagement end 101, so that the medical device 2 can be easily detached from the implanter 1'.
Furthermore, when the rod 11 ' is to be detached from the shaft 100 ' for cleaning and sterilization, the user can operate the engaging body 130 ' to rotate relative to the shaft 100 ' to completely disengage the second ratchet 131 from the first ratchet 16, and at this time, the rod 11 ' is located at a detaching position as shown in fig. 10, so that the rod 11 ', the bolt 12 ' and the screwdriver 180 can be easily detached from the receiving slot 102 for thorough cleaning and sterilization.
Compared with the prior art, the medical device joint has the advantages that the bolt is pried by the rod piece to drive the medical device to tightly abut against the outer side of the joint head; furthermore, the embodiment of the invention further utilizes the clamping mechanism to selectively limit the angular displacement of the rod relative to the shaft body so as to ensure that the medical device is tightly abutted against the outer side of the head, thereby effectively avoiding the accidental loosening in the operation and improving the operation reliability and the operation accuracy. In addition, compared with the traditional design, the invention has the advantages of simplicity, reliability, convenient operation and easy cleaning and sterilization, thereby effectively reducing the burden of medical personnel and reducing the risk of postoperative infection of patients.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An implanter for medical devices, comprising
A shaft member including a shaft body and a joint head portion disposed at one end of the shaft body;
a rod movably arranged on the shaft body, wherein one end of the rod is adjacent to the inner side of the joint head part;
a bolt mounted to the end of the rod and passing through the engagement head to connect the medical device;
the first ratchet is arranged at the other end of the rod piece and comprises a plurality of first clamping teeth, a first clamping hook and a first ratchet body, the first clamping teeth and the first clamping hook protrude out of the first ratchet body, the first clamping hook is arranged on one side of the first clamping teeth, and the height of each first clamping tooth is smaller than that of the first clamping hook; and
the clamping mechanism is movably arranged at the other end of the shaft body and is far away from the joint head part, and the clamping mechanism selectively limits or allows the angular displacement of the rod piece relative to the shaft body; the clamping mechanism comprises a clamping body and a second ratchet which is arranged on one side of the clamping body and corresponds to the first ratchet, the first ratchet is used for clamping the second ratchet, and the second ratchet is selectively clamped on the corresponding first clamping tooth or the first clamping hook so as to limit the angular displacement of the rod piece relative to the shaft body;
when the rod is stressed and bent relative to the shaft body, the end of the rod prizes the bolt, so that the medical device is driven by the bolt to tightly abut against one outer side of the joint head.
2. An implant according to claim 1, wherein the lever is in a locked position when the second ratchet engages the corresponding first engagement tooth, in a unlocked position when the second ratchet engages the first engagement hook, and in a disassembled position when the second ratchet disengages from the first ratchet.
3. The implant of claim 1, wherein the shaft and the rod are each straight, and a head of the bolt is received in the rod and is capable of rotating with the shaft and the rod.
4. The implant of claim 1, wherein the shaft is curved, the implant further comprising a screwdriver, wherein a head of the bolt is formed with a socket for engaging with the screwdriver, such that the screwdriver can rotate the bolt.
5. The implant of claim 1, wherein the rod is removably disposed on the shaft.
6. An implant according to claim 1, wherein the end of the rod is formed with a notch adjacent the engagement head, and the bolt includes a neck for engaging the notch in the rod.
7. The implant of claim 1, wherein the bolt includes a connection portion that is threaded, bayonet, or dovetail to connect the medical device.
8. An implant according to claim 1, wherein the medical device is an implant, an implant trial or a surgical instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007522.8A CN108272478B (en) | 2017-01-05 | 2017-01-05 | Implanter for medical devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007522.8A CN108272478B (en) | 2017-01-05 | 2017-01-05 | Implanter for medical devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108272478A CN108272478A (en) | 2018-07-13 |
| CN108272478B true CN108272478B (en) | 2020-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710007522.8A Active CN108272478B (en) | 2017-01-05 | 2017-01-05 | Implanter for medical devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108272478B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200197065A1 (en) * | 2018-12-25 | 2020-06-25 | Ren-Hong Huang | Surgical device and surgical impactor thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0535973A1 (en) * | 1991-10-04 | 1993-04-07 | JOHNSON & JOHNSON ORTHOPAEDICS, INC. | An acetabular cup inserter |
| US6626913B1 (en) * | 1999-03-03 | 2003-09-30 | Smith & Nephew, Inc. | Methods, systems, and instruments for inserting prosthetic implants |
| CN101292918A (en) * | 2007-03-21 | 2008-10-29 | 贝鲁斯研制厂 | Device for inserting a radially expandable implant, treatment kit and associated insertion method |
| EP2476397A1 (en) * | 2011-01-17 | 2012-07-18 | Greatbatch Medical SA | Straight cup impactor with lever arm |
| CN103813764A (en) * | 2011-04-06 | 2014-05-21 | 德普伊新特斯产品有限责任公司 | Instrument assembly for implanting revision hip prosthesis and orthopaedic surgical procedure for using same |
| WO2016055851A1 (en) * | 2014-10-10 | 2016-04-14 | Incipio Devices Sa | Cup impactor |
-
2017
- 2017-01-05 CN CN201710007522.8A patent/CN108272478B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0535973A1 (en) * | 1991-10-04 | 1993-04-07 | JOHNSON & JOHNSON ORTHOPAEDICS, INC. | An acetabular cup inserter |
| US6626913B1 (en) * | 1999-03-03 | 2003-09-30 | Smith & Nephew, Inc. | Methods, systems, and instruments for inserting prosthetic implants |
| CN101292918A (en) * | 2007-03-21 | 2008-10-29 | 贝鲁斯研制厂 | Device for inserting a radially expandable implant, treatment kit and associated insertion method |
| EP2476397A1 (en) * | 2011-01-17 | 2012-07-18 | Greatbatch Medical SA | Straight cup impactor with lever arm |
| CN103813764A (en) * | 2011-04-06 | 2014-05-21 | 德普伊新特斯产品有限责任公司 | Instrument assembly for implanting revision hip prosthesis and orthopaedic surgical procedure for using same |
| WO2016055851A1 (en) * | 2014-10-10 | 2016-04-14 | Incipio Devices Sa | Cup impactor |
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| Publication number | Publication date |
|---|---|
| CN108272478A (en) | 2018-07-13 |
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