CN110652358A - Surgical instrument of tumor surgical robot - Google Patents
Surgical instrument of tumor surgical robot Download PDFInfo
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- CN110652358A CN110652358A CN201910970398.4A CN201910970398A CN110652358A CN 110652358 A CN110652358 A CN 110652358A CN 201910970398 A CN201910970398 A CN 201910970398A CN 110652358 A CN110652358 A CN 110652358A
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- lower jaw
- upper jaw
- inner tube
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- 206010028980 Neoplasm Diseases 0.000 title claims abstract description 14
- 238000001356 surgical procedure Methods 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 206010017815 Gastric perforation Diseases 0.000 description 1
- 238000007486 appendectomy Methods 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
- A61B2034/305—Details of wrist mechanisms at distal ends of robotic arms
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
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- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Manipulator (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a robot surgical instrument for tumor surgery, which belongs to the field of medical instruments, and comprises an executive component, a long pipe and a driving component, wherein the executive component is connected with the long pipe, the long pipe is connected with the driving component, the driving component drives the executive component to be in contact with human tissues through the long pipe and realizes surgical instructions, and the executive component comprises: the upper jaw and the lower jaw are hinged at the connecting head, the connecting head is fixedly connected with the long pipe, and the long pipe is used for fixing the upper jaw and the lower jaw through the connecting head; the push rod, the push rod near-end and driving piece be connected, the push rod is driven by the driving piece, the distal end of push rod is equipped with two push arms that are parallel to each other, driving piece drive push rod further drives push arm and removes along the sliding tray, push arm along the opening and closing of sliding tray control palace and chin and then realize the operation instruction.
Description
Technical Field
The present invention relates to the field of medical devices.
Background
The robot operation system is a comprehensive body integrating a plurality of modern high-tech means, has wide application and has a great amount of application in clinical surgery. The surgeon can operate the machine far away from the operating table, is completely different from the traditional operation concept, is a credible revolutionary surgical tool in the field of world minimally invasive surgery, and takes the domestic operation robot gastric perforation repair and appendectomy in the national initiative of Hunan elegant three hospitals of the university of China 4 months and 4 days 2014.
In tumor surgery, the surgical robot has a wide application prospect, can accurately and minimally invasively excise tumors and perform other operations, the tail end of the existing tumor surgery is generally provided with an upper jaw and a lower jaw, the opening and closing of the upper jaw and the lower jaw are realized by a pulling mode, such as the upper jaw and the lower jaw shown in fig. 6, on one hand, the upper jaw and the lower jaw are provided with tail ends, parts are large and are not easy to operate, and on the other hand, the angle change of the upper jaw and the lower jaw is severe and is not easy to control due to the pulling mode.
Disclosure of Invention
The invention aims to: to the problem that above-mentioned exists, a tumour operation robot surgical instruments is disclosed, surgical instruments including executive component, long tube and driving piece, executive component connects the long tube, and the driving piece is connected to the long tube, and the driving piece passes through long tube drive executive component and the contact of human tissue and realizes the operation instruction, its characterized in that, executive component include:
the upper jaw and the lower jaw are hinged, the relative hinged part of the upper jaw and the lower jaw can rotate to control the opening and closing of the upper jaw and the lower jaw, the opening and closing of the upper jaw and the lower jaw realize an operation instruction, and the upper jaw and the lower jaw are provided with sliding grooves;
the upper jaw and the lower jaw are hinged at the connecting head, the connecting head is fixedly connected with the long pipe, and the long pipe is used for fixing the upper jaw and the lower jaw through the connecting head;
the push rod, the push rod near-end and driving piece be connected, the push rod is driven by the driving piece, the distal end of push rod is equipped with two push arms that are parallel to each other, push arm extends along the axial direction of push rod, two push arm's end inserts respectively in the sliding tray of palace and chin, driving piece drive push rod further drive push arm moves along the sliding tray, push arm controls the opening and closing of palace and chin and then realizes the operation instruction along the sliding tray.
In some preferred embodiments, the sliding groove is provided with two side grooves on the sides, and the pushing arm is provided with a pushing column at the tail end, and the pushing column is clamped in the side grooves and can move in the side grooves to enable the pushing arm to move along the sliding groove.
In a preferred embodiment, in some preferred embodiments, the push rod includes an inner tube, the inner tube is fixedly connected with the two push arms of the push rod, and the inner tube is driven by the driving member to move along the axial direction of the inner tube to drive the two push arms to move.
In some preferred embodiments, the push rod includes a slider, the slider is fixedly connected with the two push arms, the slider is in threaded connection with the inner tube, the inner tube is driven by the driving member to axially rotate along the inner tube, the axial rotation of the inner tube drives the slider to move along the axial direction of the inner tube, and the slider moves to drive the push arms to move.
In some preferred embodiments, the slider is a cylindrical slider, and the cylindrical slider is engaged with the connector.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rotating member of the present invention;
FIG. 3 is a schematic view of a first rotating member and a second rotating member of the present invention;
FIG. 4 is a schematic view of a first rotating member;
FIG. 5 is a schematic view of a second rotatable member;
FIG. 6 is a schematic view of an actuator;
FIG. 7 is a schematic view of a robotic arm;
FIG. 8 is a schematic view of an actuator according to embodiment 2;
FIG. 9 is a schematic illustration of a push rod of embodiment 2;
FIG. 10 is a schematic view of an actuator according to embodiment 2;
FIG. 11 is another schematic illustration of a push rod according to embodiment 2;
FIG. 12 is a schematic view of a drive motor;
FIG. 13 is a schematic view of a rotor;
FIG. 14 is a schematic view of a state of the rotor;
FIG. 15 is a schematic view of another state of the rotor;
FIG. 16 is a schematic view of a surgical instrument;
FIG. 17 is a schematic view of the output shaft;
FIG. 18 is a schematic view of a conventional driving motor
The labels in the figure are: 1-an actuating element, 11-an upper jaw, 111-a first pin socket, 112-a first pull groove, 12-a lower jaw, 121-a second pin socket, 122-a second pull groove, 13-a connector, 14-a slider, 15-a pull rod, a 2-long tube, 21-an outer tube, 22-an inner tube, 3-a driving element, 31-a first fixed column, 32-a second fixed column, 4-a rotating element, 41-a first rotating element, 411-a first connecting shaft, 412-a first motor, 413-a first arc channel, 414-a first accommodating groove, 42-a second rotating element, 421-a second connecting shaft, 422-a second motor, 423-a second arc channel, 424-a second accommodating groove, 43-a fixed element, 5-a connecting element, 6-a mechanical arm, 61-first mechanical arm, 62-second mechanical arm, 63-third mechanical arm, 64-fourth mechanical arm, 7-executive component, 71-upper jaw, 72-lower jaw, 711-sliding groove, 712-lateral groove, 73-push rod, 731-push arm, 732-push column, 733-inner tube, 734-cylindrical slide block, 74-connecting head, 8-driving motor, 81-motor shell, 82-first stator, 83-second stator, 84-rotor, 841-rotor head, 842-rotor rod, 843-rotor tail, 85-one-way bearing, 86-output shaft and 9-shell.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example 1: the embodiment discloses a rotating part of a tumor surgical robot, which is fixedly connected with a surgical instrument, and particularly, as shown in fig. 1, the surgical instrument comprises a driving part 3, and a rotating part 4 is fixedly connected with the driving part and further controls the surgical instrument to rotate along a plurality of angular directions.
In one embodiment, as shown in fig. 2, the rotating member 4 includes a fixed member 43, a first rotating member 41 and a second rotating member 42. As shown in fig. 7, the fixture is connected to a link 5, which connects the fixture to a robot arm 6. In a further embodiment, the robot arms comprise a first robot arm 61, a second robot arm 62, a third robot arm 63, a fourth robot arm 64, which are interconnected to provide different degrees of freedom.
In a further embodiment, as shown in fig. 2, the fixed member has a hollow cavity in the middle, and in a preferred embodiment, the fixed member includes four side walls, the four side walls enclose the hollow cavity, the hollow cavity is connected in front and back, and the first rotating member and the second rotating member are respectively located in the hollow cavity. Specifically, a hollow channel is arranged inside the first rotating member, the first rotating member is connected with the fixed member through a first connecting shaft 411, two ends of the first connecting shaft are respectively connected with opposite side walls of the fixed member, two separated sections can be seen from the first connecting shaft, the axial directions of the two sections are on a straight line, the axial direction of the first connecting shaft is the first direction, the first rotating member is arranged between the two sections of the first connecting shaft, one section of the first connecting shaft is connected with a first motor 412 and is driven by the first motor 412 to axially rotate, the rotating shaft is the first direction, the first motor drives the first connecting shaft to rotate, and further drives the first rotating member to rotate relative to the first direction,
as further shown in fig. 3, the second rotating member is located in the hollow cavity of the fixed member, the second rotating member and the first rotating member are distributed along a third direction, the third direction is perpendicular to the first direction and the second direction, respectively, and the third direction is the axial direction of the long tube. In some preferred embodiments, the second rotating member and the first rotating member have the same structure, and may be regarded as being changed by rotating the first rotating member by 90 degrees around the third direction. The second rotating part is connected with the fixing part through a second connecting shaft 421, the axial direction of the second connecting shaft is the second direction, the second rotating part can rotate relative to the second direction, and a hollow channel is arranged in the second rotating part. The hollow channel of the first rotating part extends and distributes along the first direction, so that when the driving part rotates relative to the second direction, the driving part can swing in the hollow channel of the first rotating part, and the hollow channel of the second rotating part extends and distributes along the second direction, so that when the driving part rotates relative to the first direction, the driving part can swing in the hollow channel of the second rotating part.
The driving part of the surgical instrument penetrates through the hollow channel of the first rotating part and the hollow channel of the second rotating part and is fixed by the first rotating part and the second rotating part, the first direction is vertical to the second direction, the first rotating part rotates relative to the first direction to drive the surgical instrument to rotate around the first direction, and the second rotating part rotates relative to the second direction to drive the surgical instrument to rotate around the second direction. The second connecting shaft 421 is connected to the second motor 422, and the second connecting shaft is driven by the second motor to axially rotate.
The first rotating member and the second rotating member can be distributed in a close-fitting manner, or have a larger distance therebetween, when the distance therebetween is smaller, the rotation of the first rotating member and the rotation of the second rotating member can interfere with each other, but the distance is smaller and the space can be saved.
Further, as shown in fig. 1, in some preferred embodiments, the surgical instrument includes an executing member 1, a long tube 2, and a driving member 3, the executing member performs a tumor surgery instruction execution, the long tube connects the executing member and the driving member, the driving member drives the executing member through the long tube to complete the tumor surgery instruction, for example, a motor is provided in the driving member to control the executing member 1.
The fixed position of the drive member and the rotatable member is important, as it is desirable that the drive member is not movable in a third direction relative to the rotatable member, and that the rotatable member is capable of driving rotation of the surgical instrument, whereby, in a further preferred embodiment, as shown in figure 3,
the first rotating member is provided with a first arc-shaped channel 413 penetrating through the first rotating member, the arc center of the first arc-shaped channel is in the second direction, the driving member is provided with a first fixing column 31, the first fixing column is matched with the first arc-shaped channel and can move in the first arc-shaped channel along the arc-shaped channel, and when the surgical instrument rotates around the second direction, the first fixing column moves in the first arc-shaped channel. The second rotating part is provided with a second arc-shaped channel 423, the arc center of the second arc-shaped channel is in the first direction, the driving part is provided with a second fixing column 32, the second fixing column is inserted into the second arc-shaped channel, and when the surgical instrument rotates around the first direction, the second fixing column moves in the second arc-shaped channel. The driving piece is fixed on one hand through the matching of the fixed column and the arc-shaped channel, so that the positions of the driving piece and the rotating piece in the third direction are fixed, and meanwhile, the driving piece can be enabled to rotate relative to the fixing piece in the first direction, the second direction, and the combined direction of the first direction and the second direction.
As shown in fig. 1 and 6, the executing member is extended into the human tissue to perform the operation, the executing member comprises an upper jaw 11 and an upper jaw 12, the upper jaw is provided with a first pin opening 111, the lower jaw is provided with a second pin opening 121, the upper jaw and the lower jaw are connected through a pin through the first pin opening and the second pin opening, the front ends of the upper jaw and the lower jaw rotate relative to the direction of the pin, the rear end of the upper jaw is provided with a first pull groove 112, the rear end of the lower jaw is provided with a second pull groove 122, the executing piece further comprises a sliding block 14, pull columns are arranged at two ends of the sliding block 14, the pull columns at the two ends are respectively inserted into the first pull groove and the second pull groove, the movement of the pull post in the first pull slot and the second pull slot drives the upper jaw and the lower jaw to rotate along the direction of the pin, in the candle, the sliding block 14 is in threaded connection with an inner tube 22, the inner tube is driven to rotate by a driving part, and the inner tube rotates to drive the sliding block 14 to move along the axial direction of the inner tube so as to drive the pull column to move in the first pull groove and the second pull groove.
In a further preferred embodiment, as shown in fig. 6, the actuator further comprises a connecting head 13, the connecting head is provided with a slot, the rear ends of the upper jaw and the lower jaw are clamped in the slot, and the upper jaw and the lower jaw are fixed on the connecting head through the first pin port and the second pin port by the pin.
In a further preferred embodiment, as shown in fig. 6, the connector is connected to an outer tube 21, one end of which is connected to the connector and the other end of which is connected to the driving member, and the inner tube 22 is arranged inside the outer tube.
The driving member of this embodiment can adopt a conventional driving device, as shown in fig. 16, the driving member is connected with the long tube of the surgical instrument, two ends of the long tube are respectively connected with the driving member and the executing member, the driving member controls the executing member through the long tube, the driving member includes a housing 9 and a driving motor 8, a cavity is arranged in the housing, the driving motor is located in the cavity, and the driving motor is connected with the long tube.
In a preferred embodiment, the driving motor includes: a motor housing 81, an output shaft 86, and a power unit,
the motor shell is internally provided with a driving cavity, an output shaft is fixed by the motor shell and connected with a long pipe, and the rotation of the output shaft drives an executing part through the long pipe. As shown in fig. 17, the output shaft is provided with two power units for driving the output shaft to rotate, the two power units are distributed along the axial direction of the output shaft, and the two power units respectively drive the output shaft to rotate in different directions to control the actuating member of the surgical instrument to make opposite commands, such as opening and closing, advancing and retreating, and the like of the actuating member.
Further as shown in fig. 13, the power unit includes a first stator 82, a second stator 83, a rotor 84, and a one-way bearing 85, the first stator and the second stator are distributed on the inner wall of the motor housing in the driving cavity, the first stator and the second stator are provided with energizing coils whose directions can be changed, the rotor includes a rotor head 841, a rotor rod 842 and a rotor tail 843, the rotor head is located between the first stator and the second stator, the rotor tail is connected with the one-way bearing, the rotor rod is connected with the rotor head and the rotor tail, the rotor head is provided with magnetism, the direction of the coil current on the first stator and the second stator is regularly changed to enable the rotor head to swing back and forth between the first stator and the second stator, and the back-and-forth swing of the rotor head drives the output shaft to rotate towards one direction through the one-way bearing to drive the executing piece of the. As shown in fig. 14 and 15, when the rotor rotates to approach the right stator, the direction of the current changes, the direction of the magnetic force applied to the rotor changes, and the rotor is driven to rotate towards the left. As shown in fig. 14, the magnetic force applied to the rotor has the same direction as the rotation direction of the rotor, so that a large power output is realized under a constant current. Furthermore, the rotor tail is of a circular ring structure, the outer ring of the one-way bearing is located in the circular ring structure, and the inner ring of the one-way bearing is fixedly connected with the output shaft.
In order to control the current direction, a sensor is arranged on the inner wall of the motor shell and connected with a controller, the controller controls the current direction of the coils on the first stator and the second stator to change, and when the first stator or the second stator passes around the sensor, the sensor is triggered and transmits a signal to the controller.
In order to realize the output of higher power, the rotor tail is connected with a plurality of rotor rods, the tail end of each rotor rod is connected with a rotor head, each rotor head is respectively positioned between the stators, each stator is provided with a coil, the direction of current in the coil is variable, and the number of electrons is even, such as 2, 4, 8 and the like.
Example 2
The embodiment discloses a surgical instrument, which can be installed on a rotating part and a mechanical arm in the middle of embodiment 1 for a surgical robot to use, wherein the surgical instrument comprises an executing part, a long pipe and a driving part, the executing part is connected with the long pipe, the long pipe is connected with the driving part, and the driving part drives the executing part to contact with human tissues through the long pipe and realizes a surgical instruction.
As shown in fig. 8, the executing member comprises an upper jaw 71 and a lower jaw 72, the upper jaw and the lower jaw are hinged, the relative hinged parts of the upper jaw and the lower jaw can rotate to control the opening and closing of the upper jaw and the lower jaw, the opening and closing of the upper jaw and the lower jaw realize operation instructions, such as electrocoagulation instructions, clamping instructions and the like, and the upper jaw and the lower jaw are provided with a sliding groove 711;
the connecting head 74 is hinged with the upper jaw and the lower jaw at the connecting head, the connecting head is fixedly connected with the long pipe, and the long pipe is used for fixing the upper jaw and the lower jaw through the connecting head;
the push rod 73, the push rod proximal end and the driving piece be connected, the push rod is driven by the driving piece, the distal end of push rod is equipped with two push arms 731 that are parallel to each other, push arm extends along the axial direction of push rod, the end of two push arms inserts respectively in the sliding tray of palace and chin, the driving piece drive push rod further drive push arm along the sliding tray removal, push arm along the sliding tray control palace and chin switching and then realize the operation instruction.
The two pushing arms are rigidly connected, but in some cases, the buffer between the two pushing arms changes, and the elasticity changes when the two pushing arms are not parallel, so that the angle change of the upper jaw and the lower jaw can be influenced. Thus in some preferred embodiments, as shown in fig. 8, the sliding slot is flanked by two lateral slots 712, as shown in fig. 9, and the push arm is terminated by a push post 732 that snaps into and is movable within the lateral slot to allow the push arm to move along the sliding slot, the mating of the push post and the lateral slot securing the push arm at the end of the push arm in the sliding slot to allow the push arm to precisely control the change in the angle of the upper and lower jaws.
In some preferred embodiments, as shown in fig. 9, the push rod includes an inner tube 733, the inner tube 733 is fixedly connected to two push arms of the push rod, and the inner tube is driven by the driving member to move along the axial direction of the inner tube to drive the two push arms to move.
In other different embodiments, the push rod includes a slider, the slider is fixedly connected to the two push arms, the slider is in threaded connection with the inner tube, the inner tube is driven by the driving member to axially rotate along the inner tube, the axial rotation of the inner tube drives the slider to move along the axial direction of the inner tube, the slider moves to drive the push arms to move, and the slider is engaged with the connector by the cylindrical slider 734 which is engaged with the cylindrical slider.
Claims (4)
1. The utility model provides a tumour operation robot surgical instruments, surgical instruments including executive, long tube and driving piece, executive connects the long tube, the driving piece is connected to the long tube, the driving piece passes through long tube drive executive and the contact of human tissue and realizes operation instruction, its characterized in that, executive include:
the surgical instrument comprises an upper jaw (71) and a lower jaw (72), wherein the upper jaw and the lower jaw are hinged, the relative hinged parts of the upper jaw and the lower jaw can rotate to control the opening and closing of the upper jaw and the lower jaw, the opening and closing of the upper jaw and the lower jaw realize surgical instructions, and the upper jaw and the lower jaw are provided with sliding grooves (711);
the upper jaw and the lower jaw are hinged at the connecting head (74), the connecting head is fixedly connected with the long pipe, and the long pipe is used for fixing the upper jaw and the lower jaw through the connecting head;
the proximal end of the push rod is connected with the driving piece, the push rod is driven by the driving piece, the distal end of the push rod is provided with two push arms (731) which are parallel to each other, the push arms extend along the axial direction of the push rod, the tail ends of the two push arms are respectively inserted into the sliding grooves of the upper jaw and the lower jaw, the driving piece drives the push rod to further drive the push arms to move along the sliding grooves, and the push arms control the opening and closing of the upper jaw and the lower jaw along the sliding grooves so as to realize an operation instruction;
two side grooves are arranged on the side of the sliding groove, a push column (732) is arranged at the tail end of the push arm, and the push column is clamped in the side grooves and can move in the side grooves so that the push arm can move along the sliding groove.
2. A robotic surgical instrument for tumour surgery as claimed in claim 1, characterized in that the push rod comprises an inner tube (733) fixedly connected to the push arms of the push rod, the inner tube being driven by the drive member to move in the axial direction of the inner tube to drive the push arms to move.
3. A robotic surgical instrument for tumor surgery as claimed in claim 1, wherein the push rod comprises a slider, the slider is fixedly connected to the two push arms, the slider is threadedly connected to the inner tube, the inner tube is driven by the driving member to axially rotate along the inner tube, the axial rotation of the inner tube drives the slider to move along the axial direction of the inner tube, and the slider moves to drive the push arms to move.
4. A robotic surgical instrument for tumour surgery according to claim 3, said slider being engaged by a cylindrical slider (734), said cylindrical slider and said coupling head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970398.4A CN110652358B (en) | 2019-10-13 | 2019-10-13 | Surgical instrument of tumor surgical robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970398.4A CN110652358B (en) | 2019-10-13 | 2019-10-13 | Surgical instrument of tumor surgical robot |
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| CN110652358A true CN110652358A (en) | 2020-01-07 |
| CN110652358B CN110652358B (en) | 2020-04-24 |
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| CN201910970398.4A Expired - Fee Related CN110652358B (en) | 2019-10-13 | 2019-10-13 | Surgical instrument of tumor surgical robot |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112263289A (en) * | 2020-12-25 | 2021-01-26 | 先健科技(深圳)有限公司 | Clamping device and suturing device |
| CN112515713A (en) * | 2020-10-15 | 2021-03-19 | 广州源临医疗器械有限公司 | Operating handle and phimosis expansion device |
| CN113081271A (en) * | 2021-03-17 | 2021-07-09 | 北京铸正机器人有限公司 | Minimally invasive surgery robot |
| CN113081085A (en) * | 2021-04-27 | 2021-07-09 | 极限人工智能有限公司 | Surgical instrument connecting joint and surgical instrument |
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|---|---|
| CN110652358B (en) | 2020-04-24 |
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