CN109707288A - Steel construction closed guard gate - Google Patents
Steel construction closed guard gate Download PDFInfo
- Publication number
- CN109707288A CN109707288A CN201811460955.XA CN201811460955A CN109707288A CN 109707288 A CN109707288 A CN 109707288A CN 201811460955 A CN201811460955 A CN 201811460955A CN 109707288 A CN109707288 A CN 109707288A
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- door body
- runner
- closed guard
- guard gate
- doorframe
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Abstract
The present invention relates to a kind of steel construction closed guard gates, including doorframe and the biparting door body being arranged in doorframe, biparting door body includes the first door body and the second door body, it is hinged by first rotating shaft and the first door body on doorframe, it is hinged by the second shaft and the second door body, first rotating shaft is equipped with the first runner far from ground surface end fixing sleeve, second shaft is equipped with the second runner far from ground surface end fixing sleeve, wirerope is equipped between first runner and the second runner, the one ends wound of wirerope is on the periphery wall of the second runner, opposite direction of the other end along the direction being wound on the second runner is wrapped on the outer wall of the first runner, doorframe is embedded in wall.When needing to open closed guard gate, push the first door body, second door body will be with the first moving for door body and be moved, when so that the first door body being opened, the biparting door body of the closed guard gate can be opened simultaneously, the present invention has the more convenient and time-saving effect when opening and closing the closed guard gate in this way.
Description
Technical field
The present invention relates to Technology for Civil Air Defence Projects fields, more particularly, to a kind of steel construction closed guard gate.
Background technique
People's air defense is also known as civil defence, and civil defence is international word, is that government mobilizes and organize the masses, takes anti-air strike, combat a natural disaster
Disaster Relief Measures, implement rescue action, prevention and the activity for mitigating disaster harm, and closed guard gate belongs to civil defence safeguard, to meet
Protection and sealing function requirement.In numerous closed guard gate's types, steel construction closed guard gate application is universal, the control form master of opening and closing
If manually controlling form, i.e., closed guard gate is manually operated door.
In the prior art, two handles are set on the inside of the door leaf of manually operated door, and each handle turns with a vertical link
Dynamic connection, rotation is provided with tapered end in vertical link, when opening or closing, rotates one of them in two handles, drive with
The link rotatable of handle connection, so that the tapered end connecting with the connecting rod be driven to rotate so that the vertical side of tapered end and doorframe point
From or open；Then another handle is rotated, so that the vertical other side of the tapered end and doorframe that connect through connecting rod with another handle
Separation is opened, final to realize opening or closing for door leaf.
It is successively to operate two handles to realize, and the weight of closed guard gate is up to 1 but when due to opening or closing door leaf
Ton, successively operating two handles causes to be more troublesome and waste time.
Summary of the invention
The object of the present invention is to provide a kind of steel construction closed guard gates, have and push wherein Yishanmen, can drive another fan
Door closure or openness, more convenient and saving time.
Foregoing invention purpose of the invention has the technical scheme that
A kind of steel construction closed guard gate, including doorframe and the biparting door body being arranged in doorframe, the biparting door body includes first
Body and the second door body, it is hinged by first rotating shaft and the first door body on the doorframe, pass through the second shaft and the second door body is hinged,
The first rotating shaft is equipped with the first runner far from ground surface end fixing sleeve, and second shaft is equipped with second turn far from ground fixing sleeve
Wheel, first runner and the second runner are respectively positioned on the top of the first door body Yu the second door body, first runner and second turn
Be equipped with wirerope between wheel, the one ends wound of the wirerope on the periphery wall of the second runner, the other end along be wound to the
The opposite direction in the direction on two runners is wrapped on the outer wall of the first runner, and the doorframe is embedded in wall.
Implement above-mentioned technical proposal, when needing to open closed guard gate, push the first door body, so that first rotating shaft drives first
Runner rotation, and wirerope is wound, because wirerope is wrapped on the periphery wall of the second runner far from the first runner end
Direction be wrapped in reversed on the first runner on the contrary, so when the first runner winds wirerope, wirerope by
Pulling force, it will drive the second runner and the second shaft to be rotated in reverse direction, the second door body will be with the first door body at this time
Move and moved so that push the first door body, by the first door body open when, can be by the bivalve door of the closed guard gate
Body opens simultaneously；When needing to shut closed guard gate, push the second door body, then it is same to comprehend so that the first door body is with the second door body
It is moved, so that pushing the second door body, it, can be by the biparting door body of the closed guard gate when by the second door body closure
It is closed at together, in this way when opening and closing the closed guard gate, the not only more convenient and saving time.
Further, the first rotating shaft is equipped with bracket, the branch far from turning set equal on the end on ground with the second shaft
Frame is connected with lantern ring far from the end of first rotating shaft or the second shaft, and the lantern ring is located at the periphery of the first runner or the second runner
The top of wall, the end of the wirerope both pass through the lantern ring volume and are located on corresponding first runner or the second runner.
Implement above-mentioned technical proposal, when the first runner and the second runner are rotated to be wound or be unreeled to wirerope
When, the setting of lantern ring plays position-limiting action to wirerope, so that wirerope is being wound or unreeled to the first runner or the second runner
It is always positioned at the top of the periphery wall of the first runner or the second rolling wheel in the process, to achieve the purpose that limit wirerope,
To guarantee that wirerope can smoothly be wound on the first runner or on the second runner.
Further, the both ends of first runner and the second runner are provided with for preventing both ends of the wirerope from runner
The baffle of disengaging.
Implement above-mentioned technical proposal, the setting of baffle is for preventing wirerope from being detached from from the first runner or the second runner.
Further, the bottom of first door body and the second door body offers cavity, first door body with second
The bottom wall of body is spaced apart the through-hole being equipped with not less than one, and the through-hole is connected to the cavity, and activity is set in the through-hole
It is equipped with diameter and is greater than through-hole diameter and the ball with ground face contact, correspond to ball in the interior cavity wall opposite with through-hole of the cavity and set
Be equipped with so that ball has a spring with the trend of ground face contact always, one end of each spring with cavity opposing through-bores
The cavity wall connection of setting, the other end are contradicted with the corresponding ball.
When implementing above-mentioned technical proposal, the first door body or mobile the second door body, ball will be rolled in through-hole, with
The frictional force between the first door body and the second door body and ground is reduced, the staff that is more convenient in this way pushes the first door body or second
Door body so that it is more easy and convenient to open and close the closed guard gate, and saves the time, and the setting of spring is so that ball always can be with ground
It keeps contradicting and being rolled with the first door body and the second moving for door body, to achieve the purpose that reduce frictional force.
Further, the spring is connected with the rolling plate of semicircular in shape, the ball and the rolling plate close to the end of ball
Concave surface contradict.
Implement above-mentioned technical proposal, with the movement of the first door body and the second door body, ball will be rolled in rolling plate
Dynamic, the setting of rolling plate increases the contact area between spring and ball, so that ball is not easy to be detached from spring.
Further, plastic hoop, the plastics are provided on the internal perisporium of the through-hole.
Implement above-mentioned technical proposal, the setting of plastic hoop is for avoiding the internal perisporium of ball and through-hole from rubbing, in this way
When so that ball rolling in through-hole, it is not easily susceptible to wear.
Further, fixing sleeve is equipped with fixed ring in the first rotating shaft, opens up fluted, the doorframe in the fixed ring
The upper side positioned at fixed ring is rotatably connected to fast pulley, and the fast pulley is axially perpendicular to the axial direction of fixed ring, the fixation
The groove is corresponded on wheel and is provided with inserted block, and the fast pulley is stretched out in the end of the inserted block, and the inserted block is plugged in groove
When, first door body and the second door body in opened condition, are wound with the drawing for pulling fast pulley to rotate on the fast pulley
It is provided at rope, the fast pulley and doorframe rotation connection so that there is fast pulley drive inserted block to rotate towards fixed ring always
The torsional spring of trend.
Implement above-mentioned technical proposal, pushes the first door body, so that the second door body is moved with the movement of the first door body,
First rotating shaft rotates at this time, is rotated so that fixed ring synchronizes, when fixed ring, which turns to groove, to be located at below inserted block,
Torsional spring will make in inserted block insertion groove, and fixed ring will be unable to rotate at this time, i.e. the position of the first door body and the second door body is solid
It is fixed, so that the first door body is stayed open with the second door body；When needing for the first door body and the second door body to be closed, pulls and draw
Rope drives fast pulley actively so that inserted block separates from groove, then to push the first door body, so that groove is far from inserted block, then
Drawstring is unclamped, under the action of torsional spring, fast pulley will will drive inserted block and rotate towards fixed ring, so that inserted block is connected to fixed ring
On, then push the second door body closed guard gate to be closed；It will not need manually to push the after the closed guard gate opens in this way
One door body is so that the first door body is kept open with the second door body, according to convenient.
Further, be provided at the top of the doorframe for by the first runner, the second runner, fast pulley, fixed ring, insert
The shell that bar, groove and wirerope cover, the wirerope and drawstring run through the shell and are arranged.
Implement above-mentioned technical proposal, the setting of shell is for covering the first runner, the second runner and wirerope, so that should
The appearance of closed guard gate is cleaner and tidier, beautiful.
In conclusion advantageous effects of the invention are as follows:
1. when pushing the first door body mobile, the second door body will be with the movement of the first door body and move when opening and closing the closed guard gate
It is dynamic, the not only more convenient and saving time；
2. the setting of lantern ring is to steel wire when the first runner and the second runner are rotated to be wound or be unreeled to wirerope
It has restricted position-limiting action, so that wirerope is always positioned at first turn during winding or unreeling to the first runner or the second runner
The top of the periphery wall of wheel or the second rolling wheel, to achieve the purpose that limit wirerope, to guarantee that wirerope can be suitable
In the winding to the first runner of benefit or on the second runner；
3. ball will be rolled in through-hole, when the first door body or mobile the second door body to reduce the first door body and second
Frictional force between door body and ground, the staff that is more convenient in this way push the first door body or the second door body, so that folding the people
Anti- door is more easy and convenient, and saves the time.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is partial structure diagram of the invention, it is intended that shows the pass between the first runner, the second runner and wirerope
System.
Fig. 3 is partial structure diagram of the invention, it is intended that shows that the structure between fast pulley, fixed ring and torsional spring is closed
System.
Fig. 4 is the cross-sectional view in the direction A-A in Fig. 1.
In figure, 1, doorframe；11, shell；12, fast pulley；121, inserted link；122, drawstring；13, torsional spring；2, the first door body；
21, first rotating shaft；211, the first runner；2111, bracket；2112, lantern ring；2113, baffle；212, fixed ring；2121, groove；
3, the second door body；31, the second shaft；311, the second runner；32, wirerope；33, cavity；331, spring；332, rolling plate；333,
Ball；34, through-hole.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
It referring to Figures 1 and 2, is a kind of steel construction closed guard gate disclosed by the invention, including doorframe 1 and setting are in doorframe 1
Biparting door body, wherein biparting door body includes the first door body 2 and the second door body 3, and the first door body 2 is hinged by first rotating shaft 21
In the side of doorframe 1, the second door body 3 passes through the other side of the hinged doorframe 1 of the second shaft 31, when the first door body 2 and the second door body 3
When in closed state, the first door body 2 is bonded with the second door body 3 away from 21 side of first rotating shaft away from 21 side of first rotating shaft.
Referring to Fig. 2, first rotating shaft 21 far from ground surface end through the setting of doorframe 1 and fixing sleeve is equipped with the first runner 211, second
Far from ground surface end, through the setting of doorframe 1, simultaneously fixing sleeve is equipped with the second runner 311 to shaft 31, wherein the first runner 211 and second turn
Wheel 311 is respectively positioned on the top of the first door body 2 and the second door body 3, and steel wire is equipped between the first runner 211 and the second runner 311
Rope 32；The one ends wound of wirerope 32 is on the periphery wall of the second runner 311, the other end is wrapped in the outer wall of the first runner 211
On, wirerope 32 is in the winding direction on 311 periphery wall of the second runner with wirerope 32 in twining on 211 periphery wall of the first runner
Around contrary, when so that the first runner 211 winding wirerope 32, the second runner 311 unreels wirerope 32 simultaneously,
Otherwise similarly.
Referring to Fig. 3, the both ends of the first runner 211 and the second runner 311 are provided with for preventing wirerope 32 from runner
The baffle 2113 that is detached from of both ends, first rotating shaft 21 and the second shaft 31 are far from turning set equal on the end on ground equipped with bracket
2111, bracket 2111 is connected with lantern ring 2112 far from the end of first rotating shaft 21 or the second shaft 31, wherein lantern ring 2112 is located at
The top of the periphery wall of first runner 211 or the second runner 311, the end of wirerope 32 both pass through lantern ring volume 2112 and are located at correspondence
The first runner 211 or the second runner 311 on, rotated in this way when the first runner 211 and the second runner 311 to steel wire
When rope 32 is wound or unreeled, under the position-limiting action of lantern ring 2112, wirerope 32 is being wound or is being unreeled to the first runner 211
Or second be always positioned at during runner 311 first runner 211 or the second rolling wheel periphery wall top, to guarantee wirerope
32 can smoothly wind on the first runner 211 or on the second runner 311.
Referring to Fig. 3, fixing sleeve is equipped with fixed ring 212 in first rotating shaft 21, wherein opens up in fixed ring 212 fluted
2121；It is embedded with the side on doorframe 1 positioned at fixed ring 212 and is rotatably connected to fast pulley 12, fast pulley 12 is axially perpendicular to solid
Determine the axial setting of ring 212；It is provided at fast pulley 12 and 1 rotation connection of doorframe so that fast pulley 12 has always drives inserted block
The torsional spring 13 of the trend rotated towards fixed ring 212, and respective slot 2121 is provided with inserted block, the end of inserted block on fast pulley 12
The volume of the setting of stretching fast pulley 12 and inserted block is less than the volume of groove 2121, when inserted block is plugged in groove 2121, first
In opened condition, and the position of the first door body 2 and the second door body 3 is fixed for door body 2 and the second door body 3；It is wound on fast pulley 12
There is the drawstring 122 for pulling fast pulley 12 to rotate, pulls drawstring 122, drawstring 122 will make fast pulley 12 rotate, with band
Dynamic inserted block is detached from out of groove 2121.
Referring to Fig.1, the top of doorframe 1 is provided with for by the first runner 211, the second runner 311, fast pulley 12, inserted block
The shell 11 covered with wirerope 32, wirerope 32 and drawstring 122 are arranged through shell 11.
Referring to Fig. 4, the first door body 2 is spaced apart with the bottom wall of the second door body 3 is equipped with the through-hole 34 for being not less than one, and first
The bottom of door body 2 and the second door body 3 offers cavity 33, wherein through-hole 34 is connected to cavity 33；In cavity 33 with through-hole 34
Spring 331 is provided in opposite cavity wall, spring 331 is connected with the rolling plate 332 of semicircular in shape far from one end of 33 cavity wall of cavity,
The concave surface of rolling plate 332 is oppositely arranged with through-hole 34, and is rolled between rolling plate 332 and through-hole 34 and be provided with ball 333, spring 331
So that ball 333 has the trend with ground face contact always, the diameter of ball 333 is greater than 34 diameter of through-hole, the inner circumferential of through-hole 34
Plastic hoop (not marking in figure) is provided on wall；In the first door body 2 or mobile the second door body 3, ball 333 will be in rolling plate
It is rolled between 332 and through-hole 34, to reduce the frictional force between the first door body 2 and the second door body 3 and ground, so more just
The first door body 2 or the second door body 3 are pushed in staff, so that it is more easy and convenient to open and close the closed guard gate, and saves the time, and
When ball 333 rolls in through-hole 34, it will rub with plastic hoop (not marked in figure), such ball 333 is not easily susceptible to
Abrasion, the setting of rolling plate 332 increases the contact area between spring 331 and ball 333, so that ball 333 is not easy and spring
331 are detached from.
The implementation principle of the present embodiment are as follows: when needing to open closed guard gate, the first door body 2 is pushed, so that first rotating shaft 21
It drives the first runner 211 to rotate, wirerope 32 is wound to the first runner 211, because wirerope 32 is far from the first runner
211 ends are wrapped on the periphery wall of the second runner 311 along the opposite direction in direction being wrapped on the first runner 211, so when the
When one runner 211 winds wirerope 32,32 under tension of wirerope, it will drive the second runner 311 and the second shaft
31 are rotated, and to unreel to wirerope 32, the second door body 3 will be with moving and being moved for the first door body 2 at this time
It is dynamic, so that when opening the first door body 2, the biparting door body of the closed guard gate can be opened simultaneously pushing the first door body 2,
And during the first door body 2 and the second door body 3 are opened, with the movement of the first door body 2, first rotating shaft 21 rotates,
So that fixed ring 212 is synchronized and rotated, when fixed ring 212, which turns to groove 2121, to be located at below inserted block, torsional spring 13 will
So that fixed ring 212 will be unable to rotate at this time, i.e., the position of the first door body 2 and the second door body 3 is solid in inserted block insertion groove 2121
It is fixed, so that the first door body 2 is stayed open with the second door body 3.
When needing to shut closed guard gate, drawstring 122 is pulled, drives fast pulley 12 actively, so that inserted block and groove 2121
Separation, then pushes the first door body 2, so that groove 2121 far from inserted block, then unclamps drawstring 122, under the action of torsional spring 13,
Fast pulley 12 will will drive inserted block and rotate towards fixed ring 212, so that inserted block is connected in fixed ring 212, then push second
Door body 3, the second shaft 31 drives the second runner 311 to wind wirerope 32, so that the first door body 2 is with the second door body 3
Movement moved, in this way by the second door body 3 closure on when, the biparting door body of the closed guard gate can be closed at one
It rises.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of steel construction closed guard gate, including doorframe (1) and the biparting door body being arranged in doorframe (1), it is characterised in that: described
Biparting door body includes the first door body (2) and the second door body (3), passes through first rotating shaft (21) and the first door body on the doorframe (1)
(2) hingedly, by the second shaft (31) and the second door body (3) hingedly, the first rotating shaft (21) is arranged far from ground surface end fixation
Having the first runner (211), second shaft (31) is equipped with the second runner (311) far from ground surface end fixing sleeve, and described first turn
Wheel (211) and the second runner (311) are respectively positioned on the top of the first door body (2) Yu the second door body (3), first runner (211)
And second be equipped with wirerope (32) between runner (311), the one ends wound of the wirerope (32) is in the outer of the second runner (311)
On peripheral wall, the other end is along being wrapped in the outer walls of the first runner (211) with the opposite direction in the direction being wound on the second runner (311)
On, the doorframe (1) is embedded in wall.
2. steel construction closed guard gate according to claim 1, it is characterised in that: the first rotating shaft (21) and the second shaft
(31) turning set is equipped with bracket (2111) on the end far from ground, and the bracket (2111) is far from first rotating shaft (21) or the
The end of two shafts (31) is connected with lantern ring (2112), and the lantern ring (2112) is located at the first runner (211) or the second runner
(311) top of periphery wall, the end of the wirerope (32) both pass through the lantern ring (2112) volume and are located at corresponding first
On runner (211) or the second runner (311).
3. steel construction closed guard gate according to claim 1, it is characterised in that: first runner (211) and the second runner
(311) both ends are provided with the baffle (2113) for preventing wirerope (32) from being detached from from the both ends of runner.
4. steel construction closed guard gate according to claim 1, it is characterised in that: first door body (2) and the second door body (3)
Bottom offer cavity (33), first door body (2) is spaced apart with the bottom wall of the second door body (3) and is equipped with not less than one
A through-hole (34), the through-hole (34) are connected to the cavity (33), are movably set with diameter in the through-hole (34) and are greater than
Through-hole (34) diameter and with the ball of ground face contact (333), it is corresponding in the opposite cavity wall of through-hole (34) in the cavity (33)
Ball (333) is provided with so that ball (333) has the spring (331) of the trend contradicted with ground, each spring always
(331) one end and cavity (33) opposing through-bores (34) setting cavity wall connection, the other end with the corresponding ball
(333) it contradicts.
5. steel construction closed guard gate according to claim 4, it is characterised in that: the spring (331) is close to ball (333)
End is connected with the rolling plate (332) of semicircular in shape, the concave surface conflict of the ball (333) and the rolling plate (332).
6. steel construction closed guard gate according to claim 5, it is characterised in that: be provided on the internal perisporium of the through-hole (34)
Plastic hoop.
7. steel construction closed guard gate according to claim 1, it is characterised in that: fixing sleeve is equipped on the first rotating shaft (21)
Fixed ring (212) opens up fluted (2121) on the fixed ring (212), positioned at fixed ring (212) on the doorframe (1)
Side is rotatably connected to fast pulley (12), and the fast pulley (12) is axially perpendicular to the axial direction of fixed ring (212), the fast pulley
(12) groove (2121) is corresponded on and is provided with inserted block, and the fast pulley (12), the inserted block are stretched out in the end of the inserted block
Be plugged on groove (2121) it is interior when, first door body (2) and the second door body (3) in opened condition, on the fast pulley (12)
It is wound with the drawstring (122) for pulling fast pulley (12) to rotate, is arranged at the fast pulley (12) and doorframe (1) rotation connection
Have the tendency that so that fast pulley (12) has the torsional spring (13) for driving inserted block to rotate towards fixed ring (212) always.
8. steel construction closed guard gate according to claim 7, it is characterised in that: be provided with and be used at the top of the doorframe (1)
By the first runner (211), the second runner (311), fast pulley (12), fixed ring (212), inserted link (121), groove (2121) and steel
The shell (11) that cord (32) covers, the wirerope (32) and drawstring (122) are arranged through the shell (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460955.XA CN109707288B (en) | 2018-12-01 | 2018-12-01 | Steel construction people's air defense door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460955.XA CN109707288B (en) | 2018-12-01 | 2018-12-01 | Steel construction people's air defense door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109707288A true CN109707288A (en) | 2019-05-03 |
| CN109707288B CN109707288B (en) | 2020-07-17 |
Family
ID=66254549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811460955.XA Active CN109707288B (en) | 2018-12-01 | 2018-12-01 | Steel construction people's air defense door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109707288B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911034A (en) * | 2020-07-03 | 2020-11-10 | 广东电网有限责任公司 | Power distribution room door |
| CN112160665A (en) * | 2020-09-27 | 2021-01-01 | 金梓拓 | Opening and closing structure of fireproof door in staircase |
| CN113353157A (en) * | 2020-03-06 | 2021-09-07 | 现代自动车株式会社 | Internal maintenance covering piece for bus |
| CN113464018A (en) * | 2021-07-27 | 2021-10-01 | 浙江万事兴电器有限公司 | Double door structure capable of being opened and closed synchronously |
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| CN204609644U (en) * | 2015-02-03 | 2015-09-02 | 广西平果铝安福门业有限责任公司 | What a kind of single action source controlled can the double door of automatic switch lock and switch gate |
| CN107100484A (en) * | 2017-05-18 | 2017-08-29 | 华中科技大学 | The biparting inner swing door double-motor driving device of pure electric coach |
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| JPH07208016A (en) * | 1994-01-24 | 1995-08-08 | Koji Yabuki | Foot-operated door switchgear |
| CN2380653Y (en) * | 1999-06-10 | 2000-05-31 | 邢鸿有 | Synchronizer for split door |
| CN2809174Y (en) * | 2005-08-05 | 2006-08-23 | 亿丰综合工业股份有限公司 | Blind leaf angle regulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113353157A (en) * | 2020-03-06 | 2021-09-07 | 现代自动车株式会社 | Internal maintenance covering piece for bus |
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| CN113464018A (en) * | 2021-07-27 | 2021-10-01 | 浙江万事兴电器有限公司 | Double door structure capable of being opened and closed synchronously |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109707288B (en) | 2020-07-17 |
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