CN106783407B - High voltage direct current relay insulation frame - Google Patents
High voltage direct current relay insulation frame Download PDFInfo
- Publication number
- CN106783407B CN106783407B CN201611101599.3A CN201611101599A CN106783407B CN 106783407 B CN106783407 B CN 106783407B CN 201611101599 A CN201611101599 A CN 201611101599A CN 106783407 B CN106783407 B CN 106783407B
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- Prior art keywords
- positioning plate
- insulation frame
- protrusion
- frame
- insulation
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
- H01H50/042—Different parts are assembled by insertion without extra mounting facilities like screws, in an isolated mounting part, e.g. stack mounting on a coil-support
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
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Abstract
The invention discloses a kind of high voltage direct current relay insulation frames,The insulation frame is set on yoke,The insulation frame has cooperatively formed chamber with yoke,Movable contact component and stationary contact component are equipped in the chamber,The movable contact component includes movable contact spring,The yoke is equipped with positioning plate,The yoke and positioning plate be each formed with for catch bar by catch bar through hole,The catch bar epimere is located at yoke or more and is mutually fixed with movable contact spring,The insulation frame and positioning plate is formed with mutually matched position limiting structure so that positioning plate is radially fixed,The position limiting structure includes insulation frame protrusion and positioning plate protrusion,The positioning plate protrusion is fixed and is upwardly extended with the positioning plate upper surface,The insulation frame protrusion is fixed with the insulation frame inner wall,When the insulation frame coordinates with yoke,The insulation frame protrusion is located at the positioning plate protrusion and circumferentially rotates clockwise direction along positioning plate and/or rotate counterclockwise on direction.
Description
Technical field
The present invention relates to a kind of insulation frames of high voltage direct current relay.
Background technology
High voltage direct current relay includes magnetic circuit system, magnet steel, dynamic iron core, catch bar, yoke, insulation casing（Insulate frame）,
Yoke cooperatively forms sealed chamber with insulation casing, sound contact is equipped in sealed chamber, in the magnetic circuit of high voltage direct current relay
Under the action of system, dynamic iron core and catch bar move up and down, so that sound contact or disjunction.For ease of the fixation of magnet steel,
Positioning plate is mostly set in sealed chamber, and the protrusion or frame-shaped construction upwardly extended by positioning plate is to fix magnet steel.Positioning plate
Be formed with for catch bar by through-hole, and catch bar move up and down can be contacted with positioning plate through-hole wall so that positioning plate is inclined
It moves, to make magnet steel deviate, or even movable contact spring can be caused to deflect, easily influence the performance of relay.
Invention content
The object of the present invention is to provide a kind of high voltage direct current relay use can guarantee high voltage direct current relay performance
Insulate frame.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of high voltage direct current relay insulation frame, insulation
Frame is set on yoke, and the insulation frame includes top and is set to top downside and is in the frame portion for enclosing structure, the insulation
Frame has cooperatively formed chamber with yoke, and movable contact component and stationary contact component, the movable contact component packet are equipped in the chamber
The movable contact for including movable contact spring and being fixed on movable contact spring, the yoke are equipped with positioning plate, and the yoke and positioning plate are respectively formed
Be useful for catch bar by catch bar through hole, the catch bar epimere is located at yoke or more and mutually fixed with movable contact spring, institute
It states insulation frame and positioning plate is formed with mutually matched position limiting structure so that positioning plate is radially fixed, the position limiting structure includes exhausted
Edge frame protrusion and positioning plate protrusion, the positioning plate protrusion are fixed and are upwardly extended with the positioning plate upper surface, the insulation
Frame protrusion is fixed with the insulation frame inner wall, and when the insulation frame coordinates with yoke, the insulation frame protrusion is located at the positioning
Plate protrusion circumferentially rotates clockwise direction along positioning plate and/or rotates counterclockwise on direction.
Under the action of catch bar, positioning plate can be driven with rotation, but due to insulation frame protrusion and positioning plate protrusion
Setting, no matter positioning plate is circumferential clockwise turn or turns counterclockwise that positioning plate protrusion can be due to the limitation for the frame protrusion that insulate
And make positioning plate that can not rotate, to ensure that the radial of positioning plate limits, to ensure the usability of high voltage direct current relay of the present invention
Energy.Wherein, as needed, positioning plate variously-shaped, the side of can be configured as at the top of the frame that insulate that can be set to round, rectangular etc.
Shape, circle etc. are variously-shaped, insulation frame also can by being brazed, being screwed, fastener various modes and the yoke such as fixes and fixes；
The top of insulation frame and frame portion can be two independent parts, can also be integrally formed setting.Wherein, yoke is according to the difference of shape
It can be known as yoke plate, yoke cup, yoke disk etc..Wherein, positioning plate is made of isolation material, such as plastic material.
Preferably, the positioning plate is formed with several positioning plate protrusions upwardly extended, at least one positioning plate protrusion
The side wall that direction is circumferentially rotated clockwise along positioning plate with insulation frame protrusion side wall offset, the edge of at least one positioning plate protrusion
Positioning plate circumferentially rotates counterclockwise the side wall in direction and insulation frame protrusion side wall offsets.
Preferably, the insulation frame coordinates with yoke so that the insulation frame protrusion is limited in two positioning plate protrusions
Between, the edge insulation frame of the insulation frame protrusion circumferentially rotates clockwise the side wall in direction, is circumferentially rotated counterclockwise along insulation frame
The side wall in direction offsets with a positioning plate protrusion.
Preferably, the insulation frame coordinates with yoke so that the positioning plate protrusion is limited in two positioning plate protrusions
Between, the positioning plate protrusion circumferentially rotates clockwise the side wall in direction along positioning plate, is circumferentially rotated counterclockwise along positioning plate
The side wall in direction offsets with an insulation frame protrusion.
Wherein, it is arranged as required to insulation frame protrusion, the position of positioning plate protrusion and quantity, to ensure the radial direction of positioning plate
Limit.
Preferably, movable contact spring is equipped in the chamber, between the left part and positioning plate of the movable contact spring, the right side of movable contact spring
It is respectively fixed with one between portion and positioning plate and returns power spring, the power of the returning spring upper end is fixed with the movable contact spring, the power of the returning bullet
Spring lower end is fixed with the positioning plate.On the one hand the present invention may be used by being respectively set at movable contact spring both ends there are one power spring is returned
The disjunction power for providing sound contact, to return power spring be to act directly on movable contact spring, therefore needed point in sound contact due to two
From when can make movable contact and stationary contact quick separating, relay response is rapid；In addition, since movable contact spring both ends are tightened up work respectively
With on positioning plate, therefore, two are returned power spring and have that there are one the active forces for preventing movable contact spring from horizontally rotating always, to ensure
Movable contact and stationary contact precisely align, and ensure that sound contact reliably can accurately contact, avoid movable contact spring and other parts
Contact leads to the generation of failure.Wherein, the setting of position limiting structure of the present invention, avoidable catch bar, which moves up and down, drives positioning plate to turn
It is dynamic, it can avoid returning power lower spring end and be subjected to displacement, to ensure that returning power spring maintains enough power so that the disjunction of sound contact.
It is arranged preferably, the insulation frame protrusion is integrally formed with the insulation frame, the insulation frame and insulation frame are convex
It rises and is formed by ceramic post sintering；The insulation frame is projected and formed in the frame portion inner wall and extends inwardly or the insulation frame
It is projected and formed in the top inner wall and extends downwardly or the top and frame portion are connected with the insulation frame protrusion, it is described
The frame protrusion that insulate is arranged in bar shaped, and insulate frame protrusion and the axis of the catch bar are arranged in parallel.Wherein, insulate frame
Protrusion with insulation frame inner wall be integrally formed and be ceramic material, due to insulate frame protrusion setting, insulation frame be sintered when not
It is easily deformed, is conducive to the sintering of insulation frame；If the rounded setting of the arch that insulate, frame portion are arranged in cast, the frame that insulate is convex
It is more round that the setting risen can be such that insulation frame is sintered.
Preferably, the insulation frame coordinates with yoke so that the insulation frame protrusion lower edge and the positioning plate upper surface
It offsets, the positioning plate is limited between insulation frame protrusion and yoke.Above-mentioned setting is used to ensure the axial limiting of positioning plate.
Preferably, being equipped with elastomeric pad on the upside of the positioning plate, the elastomeric pad is around in enclosing structure, the bullet
Property gasket be located relatively at positioning plate protrusion outside, the elastomeric pad outer rim shape and the positioning plate outer rim shape phase
Together.Due to being sintered the presence of error, it cannot be guaranteed that the reliable contacts of insulation frame protrusion lower edge and positioning plate upper surface, by fixed
Elastomeric pad is set on the plate of position, to ensure that insulation frame protrusion compresses positioning plate.Wherein, elastomeric pad is to have elasticity by rubber etc.
Material made of gasket.Wherein, elastomeric pad is convenient for the assembly of elastomeric pad around in structure is enclosed.
Preferably, the left and right of the positioning plate two is each formed with positioning plate protrusion, the insulation frame inner wall is formed
There are four insulation frame protrusion, the raised side wall for circumferentially rotating clockwise direction along positioning plate of the positioning plate and along positioning plate week
It offsets to the side wall for rotating counterclockwise direction with an insulation frame protrusion, there are two the frames that insulate for the insulation frame left part inner wall formation
Protrusion, the insulation frame right part inner wall are formed there are two insulation frame protrusion, and two insulation frame protrusions of the insulation frame left part are in
It is arranged in parallel, two insulation frame protrusions of the insulation frame right part are set in parallel, and each positioning plate protrusion is fixed including several
Position plate protrusion monomer.Wherein, it is arranged as required to the quantity of positioning plate protrusion monomer.
Preferably, the symmetrical setting of positioning plate, each positioning plate protrusion includes a positioning plate protrusion
Monomer, the positioning plate protrusion monomer are located on the same center line of the positioning plate, and the positioning plate protrusion monomer outer wall is formed
It is fluted, it is fixed with magnet steel in the groove；The edge of the groove pushes the arc-shaped setting in section of rod axis radial direction, the magnetic
The arc-shaped setting of steel, the magnet steel arc opening direction push rod axis.The positioning plate protrusion of the present invention is for positioning plate
Limit, is also used for the fixation of magnet steel.Wherein, magnet steel and groove part setting are arc-shaped, are convenient for the fixation of magnet steel.
The present invention by realizing positioning plate fixation axially and radially, to avoid magnet steel position deflection, return under power spring
The deflection at end, to ensure being correctly aligned of sound contact, the rapid alignment of sound contact, to ensure the use of invention relay
Performance.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of position limiting structure of the present invention；
Fig. 2 is a kind of result schematic diagram of positioning plate, catch bar and the movable contact spring cooperation of the present invention；
Fig. 3 is a kind of radial cross-section of the insulation frame of the present invention；
Fig. 4 is a kind of structural schematic diagram of insulation the frame protrusion and positioning plate male cooperation of the present invention.
Specific implementation mode
Below according to the drawings and specific embodiments, the invention will be further described.
Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of high voltage direct current relay insulation frame, insulation frame 1 is set to yoke 2
On, 2 outer rim of yoke is formed with the cast protrusion 21 upwardly extended, and insulation frame 1 is including circular top 11 and is set to top 11
Downside and the frame portion 12 that structure is enclosed in cast, cast 21 inner walls of protrusion and 12 outer wall of frame portion are formed with mutually matched screw thread knot
Structure, insulation frame 1 are screwed with yoke 2 and are formed with sealed chamber.Movable contact component and stationary contact group are equipped in sealed chamber
Part, movable contact component include movable contact spring 3 and the movable contact that is fixed on movable contact spring, and stationary contact component includes and insulation arch 11
Mutually fixed exit, exit lower end are fixed with stationary contact.
Yoke 2 is equipped with positioning plate 4, yoke 2 and positioning plate 4 be each formed with for catch bar by catch bar pass through
Hole, 5 epimere of catch bar are located at 2 or more yoke and are fixed with 3 phase of movable contact spring, 5 hypomere of catch bar be located at 2 or less yoke and with dynamic iron
6 phase of core is fixed, and positioning plate is formed with the lower convexity 43 extended downwardly, and lower convexity 43 coordinates in the catch bar through hole of yoke 2
To realize the positioning of positioning plate, the catch bar through hole of positioning plate 4 is downward through the lower face of lower convexity, the promotion of positioning plate 4
Bar through hole extends upward through positioning plate upper surface.
Insulate frame 1 and positioning plate 4 is formed with mutually matched position limiting structure so that positioning plate 4 is radially fixed, position limiting structure
Including four insulation frames protrusions 13 and two positioning plate protrusions 41, positioning plate protrusion 41 is fixed and upward with 4 upper surface of positioning plate
Extend, insulation frame protrusion 13 is fixed with insulation 1 inner wall of frame and extended inwardly.
The frame protrusion 13 that insulate is integrally formed with insulation frame to be arranged, and insulation frame protrusion 13 is arranged in bar shaped, and the frame protrusion that insulate
13 are arranged along the parallel lines of the axis of catch bar 5, and 12 inner wall of frame portion and 11 inner wall of top are contacted with insulation frame protrusion 13.Its
In, insulation frame 1 is to be sintered by ceramic material.
Raised 13 lower edges of insulation frame offset with 4 upper surface of positioning plate, and positioning plate 4 is limited in insulation frame protrusion 13 and yoke
Between 2.It insulate and is equipped with elastomeric pad 7 between frame protrusion 13 and positioning plate 4, elastomeric pad 7 is arranged in circular ring shape, outside elastomeric pad 7
Edge shape is identical as 4 outer rim shape of positioning plate.
The left and right two of positioning plate 4 is each formed with a positioning plate protrusion 41, when insulation frame and yoke cooperation, insulate in frame 1
There are four insulation frame protrusion 13, side wall and the edges that direction is circumferentially rotated clockwise along positioning plate 4 of positioning plate protrusion 41 for wall formation
The circumferential side wall for rotating counterclockwise direction of positioning plate 4 offsets with an insulation frame protrusion 13, and insulation 1 left part inner wall of frame is formed with two
A insulation frame protrusion 13, insulation 1 right part inner wall of frame are formed there are two insulation frame protrusion 13, and two insulation frames of insulation frame left part are convex
It plays 13 to be set in parallel, two insulation frame protrusions 13 of insulation 1 right part of frame are set in parallel, and each positioning plate protrusion 41 includes
One positioning plate protrusion monomer.Wherein, two insulation frames of two insulation frame protrusions of insulation frame left part and 1 right part of frame that insulate
Protrusion constitutes bilateral symmetry.
Movable contact spring 3 is in put the centrosymmetric structure for symmetric points, the left end of movable contact spring 3 and positioning on 5 axis of catch bar
Between plate 4, it is respectively connected with one between the right end of movable contact spring 3 and positioning plate 4 and returns power spring 9.4 symmetrical setting of positioning plate,
Positioning plate protrusion monomer is located on the same center line of positioning plate 4, and positioning plate protrusion monomer outer wall forms fluted 42, in groove 42
It is fixed with magnet steel 8；The arc-shaped setting in section along catch bar 5 axis radial direction of groove 42, the also arc-shaped setting, and magnetic of magnet steel 8
8 arc opening of steel is towards 5 axis of catch bar.
When assembling the relay of the present invention, positioning plate is placed on yoke, and the lower convexity of positioning plate is made to be located at yoke
Catch bar through hole in realize the positioning of positioning plate, then carry out catch bar, power spring is returned at movable contact spring, movable contact spring both ends
The frame that insulate, is positioned on yoke and is made the positioning plate protrusion and insulation frame male cooperation of positioning plate by assembly, then carries out insulation frame
With being screwed for yoke, positioning plate can rotate, be screwed completion and the general of insulate frame and yoke with the rotation of insulation frame
Positioning plate, which is pressed under elastomeric pad, realizes the limit of positioning plate axially and radially, finally in the dress for carrying out catch bar and dynamic iron core
Match, the assembly of yoke lower section magnetic circuit system.
The present invention by realizing positioning plate fixation axially and radially, to avoid magnet steel position deflection, return under power spring
The deflection at end, to ensure being correctly aligned of sound contact, the rapid alignment of sound contact, to ensure the hair of invention relay
It is bright.
Claims (10)
1. a kind of high voltage direct current relay insulation frame, it is characterised in that the insulation frame is set on yoke, the insulation frame
Including top and it is set to top downside and has cooperatively formed chamber in the frame portion for enclosing structure, the insulation frame and yoke, institute
It states and is equipped with movable contact component and stationary contact component in chamber, the movable contact component includes movable contact spring and is fixed on movable contact spring
Movable contact, the yoke are equipped with positioning plate, the yoke and positioning plate be each formed with for catch bar by catch bar it is logical
Via, the catch bar epimere are located at yoke or more and are mutually fixed with movable contact spring, and the insulation frame and positioning plate are formed with mutually
For the position limiting structure of cooperation so that positioning plate is radially fixed, the position limiting structure includes that insulation frame protrusion and positioning plate are raised, described
Positioning plate protrusion is fixed and is upwardly extended with the positioning plate upper surface, and the insulation frame protrusion is solid with the insulation frame inner wall
Fixed, when the insulation frame coordinates with yoke, it is circumferentially clockwise along positioning plate that the insulation frame protrusion is located at the positioning plate protrusion
It rotation direction and/or rotates counterclockwise on direction.
2. high voltage direct current relay according to claim 1 insulation frame, it is characterised in that if the positioning plate is formed with
The dry positioning plate protrusion upwardly extended, the side wall that direction is circumferentially rotated clockwise along positioning plate of at least one positioning plate protrusion with
Insulation frame protrusion side wall offsets, side wall and the insulation that direction is circumferentially rotated counterclockwise along positioning plate of at least one positioning plate protrusion
Frame protrusion side wall offsets.
3. high voltage direct current relay according to claim 1 insulation frame, it is characterised in that the insulation frame is matched with yoke
It closes so that the insulation frame protrusion is limited between two positioning plate protrusions, the edge insulation frame of the insulation frame protrusion is circumferentially suitable
The side wall of hour hands rotation direction, the side wall that direction is circumferentially rotated counterclockwise along insulation frame offset with a positioning plate protrusion.
4. high voltage direct current relay according to claim 1 insulation frame, it is characterised in that the insulation frame is matched with yoke
Close so that the positioning plate protrusion is limited between two positioning plate protrusions, the positioning plate protrusion it is circumferentially suitable along positioning plate
The side wall of hour hands rotation direction, the side wall that direction is circumferentially rotated counterclockwise along positioning plate offset with an insulation frame protrusion.
5. high voltage direct current relay according to claim 1 insulation frame, it is characterised in that be equipped with dynamic spring in the chamber
Piece is respectively fixed with one between the left part and positioning plate of the movable contact spring, between the right part and positioning plate of movable contact spring and returns power spring, institute
It states and returns power spring upper end and fixed with the movable contact spring, the power of the returning lower spring end is fixed with the positioning plate.
6. the high voltage direct current relay insulation frame according to Claims 2 or 3 or 4, it is characterised in that the insulation frame is convex
It rises to be integrally formed with the insulation frame and be arranged, the insulation frame and insulation frame protrusion are formed by ceramic post sintering；
The insulation frame is projected and formed in the frame portion inner wall and extends inwardly or the insulation frame is projected and formed in the top
Portion's inner wall simultaneously extends downwardly or the top and frame portion are connected with the insulation frame protrusion, and the insulation frame protrusion is in bar shaped
Setting, and insulation frame protrusion and the axis of the catch bar are arranged in parallel.
7. high voltage direct current relay according to claim 2 or 3 insulation frame, it is characterised in that the insulation frame and yoke
Coordinate so that the insulation frame protrusion lower edge offsets with the positioning plate upper surface, the positioning plate is limited in insulation frame protrusion
Between yoke.
8. high voltage direct current relay according to claim 7 insulation frame, it is characterised in that be equipped on the upside of the positioning plate
Elastomeric pad, for the elastomeric pad around in structure is enclosed, the elastomeric pad is located relatively at positioning plate protrusion outside, institute
It is identical as the positioning plate outer rim shape to state elastomeric pad outer rim shape.
9. high voltage direct current relay according to claim 2 or 4 insulation frame, it is characterised in that the left and right of the positioning plate
Two are each formed with positioning plate protrusion, and the insulation frame inner wall is formed there are four insulation frame protrusion, the positioning plate protrusion
The side wall for circumferentially rotating clockwise the side wall in direction along positioning plate and circumferentially rotating counterclockwise direction along positioning plate insulate with one
Frame protrusion offsets, and the insulation frame left part inner wall is formed there are two insulation frame protrusion, and the insulation frame right part inner wall is formed with two
Two insulation frame protrusions of a insulation frame protrusion, the insulation frame left part are set in parallel, and two of the insulation frame right part are absolutely
Edge frame protrusion is set in parallel, and each positioning plate protrusion includes several positioning plate protrusion monomers.
10. high voltage direct current relay according to claim 8 insulation frame, it is characterised in that the positioning plate is in left and right pair
It includes a positioning plate protrusion monomer to claim setting, each positioning plate protrusion, and the positioning plate protrusion monomer is located at the positioning
On the same center line of plate, the positioning plate protrusion monomer outer wall forms fluted, and magnet steel is fixed in the groove；The groove
Edge push the arc-shaped setting in section of rod axis radial direction, the arc-shaped setting of magnet steel, magnet steel arc opening direction to push away
Lever axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101599.3A CN106783407B (en) | 2016-12-05 | 2016-12-05 | High voltage direct current relay insulation frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101599.3A CN106783407B (en) | 2016-12-05 | 2016-12-05 | High voltage direct current relay insulation frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783407A CN106783407A (en) | 2017-05-31 |
| CN106783407B true CN106783407B (en) | 2018-08-03 |
Family
ID=58884607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611101599.3A Active CN106783407B (en) | 2016-12-05 | 2016-12-05 | High voltage direct current relay insulation frame |
Country Status (1)
| Country | Link |
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| CN (1) | CN106783407B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010123262A (en) * | 2008-11-17 | 2010-06-03 | Mitsubishi Electric Corp | Electromagnetic switch |
| CN201966144U (en) * | 2011-01-12 | 2011-09-07 | 二一三电器深圳有限公司 | D.C. contactor that has high pressure resistant liner |
| CN204189718U (en) * | 2014-06-27 | 2015-03-04 | 施耐德电器工业公司 | Dustproof contactor |
| CN205723343U (en) * | 2016-05-27 | 2016-11-23 | 浙江英洛华新能源科技有限公司 | Closed type HVDC relay |
| CN206179790U (en) * | 2016-12-05 | 2017-05-17 | 浙江英洛华新能源科技有限公司 | Insulation frame for high -voltage direct -current relay |
-
2016
- 2016-12-05 CN CN201611101599.3A patent/CN106783407B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010123262A (en) * | 2008-11-17 | 2010-06-03 | Mitsubishi Electric Corp | Electromagnetic switch |
| CN201966144U (en) * | 2011-01-12 | 2011-09-07 | 二一三电器深圳有限公司 | D.C. contactor that has high pressure resistant liner |
| CN204189718U (en) * | 2014-06-27 | 2015-03-04 | 施耐德电器工业公司 | Dustproof contactor |
| CN205723343U (en) * | 2016-05-27 | 2016-11-23 | 浙江英洛华新能源科技有限公司 | Closed type HVDC relay |
| CN206179790U (en) * | 2016-12-05 | 2017-05-17 | 浙江英洛华新能源科技有限公司 | Insulation frame for high -voltage direct -current relay |
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| Publication number | Publication date |
|---|---|
| CN106783407A (en) | 2017-05-31 |
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