CN114300286B - Switch gear - Google Patents
Switch gear Download PDFInfo
- Publication number
- CN114300286B CN114300286B CN202111385510.1A CN202111385510A CN114300286B CN 114300286 B CN114300286 B CN 114300286B CN 202111385510 A CN202111385510 A CN 202111385510A CN 114300286 B CN114300286 B CN 114300286B
- Authority
- CN
- China
- Prior art keywords
- grounding
- shaft
- driving plate
- connecting rod
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 238000002955 isolation Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 230000033001 locomotion Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a switch transmission device for a high-voltage switch. The purpose is to provide a switch transmission device with good reliability, convenient installation and simple structure. The switch transmission device comprises a main loop system and an isolated grounding loop system, wherein the main loop system comprises a main loop operation shaft, a closing spring assembly, a separating spring assembly and a first driving plate, the main loop operation shaft is movably arranged on a bottom plate, the closing spring assembly is arranged between the main loop operation shaft and the first driving plate, the separating spring assembly is arranged between the first driving plate and an isolated grounding loop, the first driving plate is arranged on an indication shaft, the isolated grounding loop further comprises a second driving plate, the second driving plate is movably arranged on the grounded operation shaft, the second driving plate is movably connected with a grounding transmission part, the grounding transmission part is movably connected with a fifth connecting rod, the fifth connecting rod is used for connecting a grounding shaft, the isolated grounding operation shaft is fixedly connected with a grounding crank arm, and the grounding crank arm is connected with a grounding spring.
Description
Technical Field
The invention relates to the technical field of high-voltage switches, in particular to a switch transmission device for a load switch with an upper isolating switch.
Background
The ring main unit is a group of high-voltage switch equipment which is arranged in a metal or nonmetal insulating cabinet body or is made into an electric equipment for assembling the interval ring main unit, and the core part of the ring main unit adopts a load switch and a fuse, and a switch transmission device is needed when the switch is installed and used.
The existing switch transmission device generally has the structures of a driving plate, a rotating shaft, a crank arm and the like, the driving plate is driven to rotate through the rotating shaft, and the crank arm is driven to rotate through the driving plate, so that different functions are realized. The existing switch transmission device generally has the problems of inconvenient installation and debugging, more transmission parts and poor reliability, and the problems are the problems to be solved urgently in the research and development process of the existing switch transmission device.
Disclosure of Invention
The invention aims to solve the technical problem of providing a switch transmission device which has good reliability, convenient installation and simple structure.
The switch transmission device comprises a main loop system and an isolated grounding loop system,
The main loop system comprises a main loop operation shaft, a closing spring component, a separating brake spring component and a first driving plate, wherein the main loop operation shaft is movably arranged on a bottom plate, the closing spring component is arranged between the main loop operation shaft and the first driving plate, the separating brake spring component is arranged between the first driving plate and an isolated grounding operation shaft of an isolated grounding loop, the first driving plate is arranged on an indication shaft, and the indication shaft is movably arranged on the bottom plate;
The isolation grounding loop further comprises a second driving plate, the second driving plate is movably mounted on the grounding operation shaft, the second driving plate is movably connected with a grounding transmission part, the grounding transmission part is movably connected with a fifth connecting rod, the fifth connecting rod is used for connecting the grounding shaft, the isolation grounding operation shaft is fixedly connected with a grounding crank arm, and the grounding crank arm is connected with a grounding spring.
According to the switch transmission device, the first rotating disc is fixedly arranged on the main loop operation shaft, the opening crank arm part is arranged on one side of the main loop operation shaft, protons are arranged on the main shaft of the opening crank arm part, the protons and the first rotating disc on the main loop operation shaft are located on the same plane, and when the first rotating disc rotates, the protons can limit the first rotating disc.
The switch transmission device of the invention, wherein the opening crank arm component further comprises an opening button and a spring.
The switch transmission device comprises a switch-on guide cylinder, wherein the switch-on guide cylinder is provided with a switch-on spring and a switch-on baffle, one end of the switch-on guide cylinder is movably connected with a main loop operation shaft, and the other end of the switch-on guide cylinder is hinged to a connection point of a first driving plate.
The switch transmission device comprises a brake separating guide cylinder, wherein a brake separating spring and a brake separating baffle are arranged on the brake separating guide cylinder, one end of the brake separating guide cylinder is hinged with a first driving plate, the other end of the brake separating guide cylinder is provided with a long groove, and an isolated grounding operation shaft is clamped in the long groove.
The switch transmission device of the invention, wherein the first driving plate is movably connected with a first connecting rod, the first connecting rod is movably connected with a second connecting rod, the second connecting rod is movably arranged on the first support column, the second connecting rod is movably connected with a crank arm, and the crank arm is movably connected with a second rotating disc.
The switch transmission device is characterized in that an arc-shaped groove is formed in the second driving plate, a pin shaft is arranged in the arc-shaped groove, the pin shaft is connected with a third connecting rod, and the third connecting rod is movably connected with the grounding transmission part.
The switch transmission device is characterized in that a transmission rod is fixedly connected to a rotating shaft of the grounding transmission component, the transmission rod is movably connected with a fourth connecting rod, and the fourth connecting rod is movably connected with a fifth connecting rod.
According to the switch transmission device, the grounding crank arm drives the grounding spring to rotate to the midpoint, and the rotated angle is not smaller than the angle corresponding to the arc-shaped groove.
The switch driving device of the invention, wherein the other end of the grounding spring is arranged on a second pillar, and the second pillar is arranged on the bottom plate.
The switch transmission device is different from the prior art in that the switch transmission device comprises two independent motion systems in one operation mechanism, the main loop can realize switching-on and switching-off under the action of external force, and the grounding loop can realize switching-on and grounding, so that the structure of the switch transmission device is simplified as a whole. The switch transmission device ensures that the transmission of the load switch is stable through the load switch transmission component, and improves the reliability of the switch.
The switch gear of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a switch gear of the present invention;
FIG. 2 is a rear view of the switch gear of the present invention;
FIG. 3 is a left side view of the switch gear of the present invention;
The reference signs in the figure mean 2-transmission rod, 6-grounding shaft, 7-second pillar, 10-fourth link, 13-third link, 14-fifth link, 15-opening spring, 16-second driving plate, 17-grounding crank arm, 18-grounding spring, 20-isolation grounding operation shaft, 21-grounding transmission part, 22-main loop operation shaft, 23-bottom plate, 66-opening button, 69-second rotating disk, 97-first pillar, 98-proton, 118-pin shaft, 123-opening baffle, 124-closing baffle, 139-crank arm, 143-first link, 160-second link, 161-closing spring, 163-indication shaft, 165-opening guide cylinder and 166-first driving plate.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1, the switch transmission device of the invention comprises two independent motion systems of a main loop and an isolated grounding loop, wherein the main loop mainly comprises related components for closing and opening, and the isolated grounding loop comprises related components for grounding.
Specifically, as shown in fig. 1-3, the main circuit system includes a main circuit operating shaft 22, a closing spring assembly, a opening spring assembly, and a first drive plate 166. The main circuit operation shaft 22 is movably mounted on the base plate 23, and is rotatable on the base plate 23. The closing spring assembly is mounted between the main circuit operating shaft 22 and the first drive plate 166. The break spring assembly is mounted between the first drive plate 166 and the isolated ground operating shaft 20 of the isolated ground circuit. The first driving plate 166 is mounted on the indication shaft 163, and the indication shaft 163 is movably mounted on the base plate 23 and is rotatable on the base plate 23.
The main circuit operation shaft 22 is mounted with a first rotating disk that rotates in synchronization with the main circuit operation shaft 22. One side of the main circuit operating shaft 22 is provided with a brake-separating lever member. The main shaft of the brake-separating crank arm component is movably arranged on the bottom plate 23. The main shaft of the brake-separating crank arm part is provided with a proton 98, and the proton 98 and a first rotating disc on the main loop operation shaft 22 are positioned on the same plane. Protons 98 may be used to limit the first rotating disk as it rotates. The brake release lever assembly further includes a brake release button 66 and a spring, wherein the spindle and protons 98 are rotated by the spring after the brake release button 66 is depressed.
The closing spring assembly includes a closing guide cylinder on which the closing spring 161 and the closing shutter 124 are mounted. One end of the closing guide cylinder is connected with the main loop operation shaft 22 and can rotate along with the main loop operation shaft 22, and the other end of the closing guide cylinder is hinged to a lower connection point of the first driving plate 166. The closing guide cylinder can drive the first driving plate 166 to rotate along the indication shaft 163.
The break spring assembly is mounted between the first drive plate 166 and the isolated ground operating shaft 20 of the isolated ground circuit. The brake separating spring assembly comprises a brake separating guide cylinder 165, and a brake separating spring 15 and a brake separating baffle 123 are installed on the brake separating guide cylinder 165. One end of the opening guide cylinder 165 is hinged to the first driving plate 166. The other end of the brake release guide tube 165 is provided with a long groove, and the isolation grounding operation shaft 20 is clamped in the long groove. The opening spring assembly can rotate around the point where it is hinged to the first driving plate 166, and can also move linearly toward the direction where the isolation grounding operation shaft 20 and the length of the elongated slot are located.
The first driving plate 166 is connected to the first link 143 through the pin 118, the first link 143 is connected to the second link 160 through the pin, the second link 160 is movably mounted on the first support 97 through a bolt, and the second link 160 can rotate around the first support 97. The first leg 97 is fixedly mounted to the base plate 23. The second connecting rod 160 is connected with the crank arm 139 through a pin shaft, and the crank arm 139 is connected with the second rotating disk 69 through a pin shaft. The second rotating disk 69 is movably mounted on the bottom plate 23 through a pin shaft.
The isolated ground circuit system includes a ground operating shaft 20 and a second drive plate 16, the second drive plate 16 being mounted on the ground operating shaft 20 and rotatable with the isolated ground operating shaft 20. The second driving plate 16 is provided with an arc-shaped groove, a pin shaft is arranged in the arc-shaped groove, and the pin shaft is connected with the third connecting rod 13. The third connecting rod 13 is connected with the grounding transmission part 21 through a pin shaft, and the rotating shaft of the grounding transmission part 21 is movably arranged on the bottom plate 23. The rotating shaft of the grounding transmission part 21 is also fixedly connected with a transmission rod 2, the transmission rod 2 is connected with a fourth connecting rod 10 through a pin shaft, and the fourth connecting rod 10 is connected with a fifth connecting rod 14 through a pin shaft. The fifth connecting rod 14 is used for connecting the grounding shaft 6 to realize grounding operation.
The isolating grounding operation shaft 20 is fixedly connected with a grounding crank arm 17 through a pin shaft, the grounding crank arm 17 is connected with a grounding spring 18, the other end of the grounding spring 18 is arranged on the second support post 7, and the second support post 7 is arranged on the bottom plate 23. The grounding crank arm 17 can drive the grounding spring 18 to rotate, and the angle rotated by the grounding crank arm 17 to drive the grounding spring 18 to rotate to the midpoint is not smaller than the angle corresponding to the arc groove.
The switch transmission device comprises a main loop switching-on and switching-off, isolation, grounding switching-on and other working states, and the working principle is as follows:
In the process of closing the main circuit and grounding closing, the main circuit operation shaft 22 rotates clockwise to perform main circuit closing operation, and the main circuit operation shaft 22 drives the closing guide cylinder component to rotate around the hinge point of the first driving plate 166 component. The closing spring 161 on the closing guide cylinder part is compressed, and the closing spring 161 compression force applies force to the first driving plate 166 part, so that the first driving plate 166 is driven to rotate clockwise. The first driving plate 166 rotates to drive the brake release guide cylinder 165 to move around the isolated grounding operation shaft 20 and the first driving plate 166, so as to drive the brake release spring 15 to compress. When the main circuit operation shaft 22 rotates for a certain angle, the middle point is crossed, and the protons 98 on the opening crank arm component are clamped with the rotating disc on the main circuit operation shaft 22 by the aid of spring force after the middle point is crossed, so that the position is kept, and the main circuit closing is completed. The first driving plate 166 drives the first connecting rod 143 to move during the closing process, the first connecting rod 143 drives the second connecting rod 160, the crank arm 139 and the second rotating disc 69 to rotate, and the second rotating disc 69 rotates anticlockwise.
In the process of opening and closing the main loop and grounding, the opening button 66 is pressed, the opening button 66 rotates the opening crank arm part anticlockwise, the main loop operation shaft 22 and protons 98 on the opening crank arm part are separated, and the opening spring 15 releases the spring force. The first driving plate 166 drives the first link 143 to move during the opening process, the first link 143 drives the second link 160, the crank 139 and the second rotating disc 69 to rotate, and at this time, the second rotating disc 69 rotates clockwise to complete the opening process.
In the process of opening and closing the main circuit, the isolating and grounding operation shaft 20 is rotated clockwise, the isolating and grounding operation shaft 20 is a mandrel, and the opening guide cylinder 165 component does not move in the rotating process. The isolating grounding operation shaft 20 drives the grounding crank arm 17 to rotate clockwise in the rotating process, at the moment, the pin shaft connected with the third connecting rod 13 and the second driving plate 16 slides in the arc-shaped groove of the second driving plate 16, and the third connecting rod 13 does not move temporarily. The grounding crank arm 17 rotates to drive the grounding spring 18 to rotate around the second support post 7, the grounding spring 18 stretches in movement, the spring force is released after the grounding spring 18 stretches past the midpoint, the grounding spring 18 contracts to drive the isolated grounding operation shaft 20 to rotate clockwise, and the isolated grounding operation shaft 20 drives the second driving plate 16, the third connecting rod 13 and the grounding transmission part 21 to move clockwise. The grounding transmission part 21 drives the transmission rod 2 at the rear part of the bottom plate 23 to move, the transmission rod 2 drives the fourth connecting rod 10 and the fifth connecting rod 14 to move anticlockwise, and the fifth connecting rod 14 drives the grounding shaft 6 to move anticlockwise, so that isolation switching-on is completed.
And in the process of returning to the main loop brake opening and grounding brake closing, the isolating grounding operation shaft 20 is rotated anticlockwise, the isolating grounding operation shaft 20 is used as a mandrel, and the brake opening guide cylinder 165 component does not move in the rotating process. The isolating grounding operation shaft 20 drives the grounding crank arm 17 to anticlockwise in the rotating process, at this time, a pin shaft connected with the third connecting rod 13 and the second driving plate 16 slides in an arc-shaped groove of the second driving plate 16, and the third connecting rod 13 does not move temporarily. The grounding crank arm 17 rotates to drive the grounding spring 18 to rotate around the second support post 7, the grounding spring 18 stretches in the movement process, the spring force is released after the grounding spring 18 stretches past the midpoint, and the grounding spring 18 contracts to drive the isolated grounding operation shaft 20 to rotate anticlockwise. The isolated ground operation shaft 20 drives the second driving plate 16, the third link 13, and the isolated ground transmission member 21 to move clockwise. The isolated grounding transmission part 21 drives the transmission rod 2 at the rear part of the bottom plate 23 to move, the transmission rod 2 moves to drive the fourth connecting rod 10 and the fifth connecting rod 14 to move clockwise, and the fifth connecting rod 14 moves to drive the grounding shaft 6 to move clockwise, so that grounding closing is completed.
The switch transmission device comprises two independent motion systems in one operating mechanism, the main loop can realize switching-on and switching-off under the action of external force, and the grounding loop can realize switching-on and grounding, so that the structure of the switch transmission device is simplified as a whole. According to the switch transmission device, protons roll in the arc-shaped groove through the load switch transmission assembly, so that the transmission of the load switch is stable, and the reliability of the switch is improved.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. A switch transmission device is characterized by comprising a main loop system and an isolated grounding loop system,
The main loop system comprises a main loop operation shaft, a closing spring component, a separating brake spring component and a first driving plate, wherein the main loop operation shaft is movably arranged on a bottom plate, the closing spring component is arranged between the main loop operation shaft and the first driving plate, the separating brake spring component is arranged between the first driving plate and an isolated grounding operation shaft of an isolated grounding loop, the first driving plate is arranged on an indication shaft, and the indication shaft is movably arranged on the bottom plate;
the isolation grounding loop further comprises a second driving plate, the second driving plate is movably mounted on the isolation grounding operation shaft, the second driving plate is movably connected with a grounding transmission part, the grounding transmission part is movably connected with a fifth connecting rod, the fifth connecting rod is used for connecting the grounding shaft, the isolation grounding operation shaft is fixedly connected with a grounding crank arm, and the grounding crank arm is connected with a grounding spring;
The first driving plate is movably connected with a first connecting rod, the first connecting rod is movably connected with a second connecting rod, the second connecting rod is movably arranged on the first support column, the second connecting rod is movably connected with a crank arm, and the crank arm is movably connected with a second rotating disc;
The second driving plate is provided with an arc-shaped groove, a pin shaft is arranged in the arc-shaped groove, the pin shaft is connected with a third connecting rod, and the third connecting rod is movably connected with the grounding transmission part;
the rotary shaft of the grounding transmission component is fixedly connected with a transmission rod, the transmission rod is movably connected with a fourth connecting rod, and the fourth connecting rod is movably connected with a fifth connecting rod.
2. The switch transmission device of claim 1, wherein the main loop operating shaft is fixedly provided with a first rotating disc, one side of the main loop operating shaft is provided with a brake separating crank arm component, a main shaft of the brake separating crank arm component is provided with protons, the protons are located on the same plane with the first rotating disc on the main loop operating shaft, and when the first rotating disc rotates, the protons can limit the first rotating disc.
3. The switch actuator of claim 2 wherein said trip lever member further comprises a trip button and a spring.
4. The switch transmission device of claim 1, wherein the closing spring assembly comprises a closing guide cylinder, a closing spring and a closing baffle are installed on the closing guide cylinder, one end of the closing guide cylinder is movably connected with the main loop operation shaft, and the other end of the closing guide cylinder is hinged to a connecting point of the first driving plate.
5. The switch transmission device of claim 1, wherein the brake separating spring assembly comprises a brake separating guide cylinder, a brake separating spring and a brake separating baffle are arranged on the brake separating guide cylinder, one end of the brake separating guide cylinder is hinged with the first driving plate, the other end of the brake separating guide cylinder is provided with a long groove, and the isolated grounding operation shaft is clamped in the long groove.
6. The switch transmission device of claim 1, wherein the angle rotated by the grounding crank arm to drive the grounding spring to the midpoint is not smaller than the angle corresponding to the arc-shaped groove.
7. The switch actuator of claim 1 wherein the other end of the grounding spring is mounted on a second leg, the second leg being mounted on the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385510.1A CN114300286B (en) | 2021-11-22 | 2021-11-22 | Switch gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385510.1A CN114300286B (en) | 2021-11-22 | 2021-11-22 | Switch gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114300286A CN114300286A (en) | 2022-04-08 |
| CN114300286B true CN114300286B (en) | 2024-12-13 |
Family
ID=80965587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111385510.1A Active CN114300286B (en) | 2021-11-22 | 2021-11-22 | Switch gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114300286B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202008948U (en) * | 2011-04-26 | 2011-10-12 | 南京业基电气设备有限公司 | Operation mechanism of combined electrical appliance cabinet for SF6 load switch fuse protector |
| CN107146734A (en) * | 2017-07-18 | 2017-09-08 | 深圳谋远电气技术发展有限公司 | Modular switch operating mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202977292U (en) * | 2012-12-31 | 2013-06-05 | 宁波环能电气科技有限公司 | Oil buffer of vacuum circuit breaker |
| KR102018872B1 (en) * | 2013-06-24 | 2019-09-06 | 현대일렉트릭앤에너지시스템(주) | Earth switch driving mechanism of load break switch |
| CN110634717B (en) * | 2019-09-29 | 2021-10-19 | 中天电气技术有限公司 | Aerify cabinet circuit breaker |
| CN213303979U (en) * | 2020-09-29 | 2021-05-28 | 上海乾谷电力科技有限公司 | Three-station load switch operating device |
-
2021
- 2021-11-22 CN CN202111385510.1A patent/CN114300286B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202008948U (en) * | 2011-04-26 | 2011-10-12 | 南京业基电气设备有限公司 | Operation mechanism of combined electrical appliance cabinet for SF6 load switch fuse protector |
| CN107146734A (en) * | 2017-07-18 | 2017-09-08 | 深圳谋远电气技术发展有限公司 | Modular switch operating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114300286A (en) | 2022-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3082143A1 (en) | Motor cam operating mechanism and transmission mechanism thereof | |
| KR20140112503A (en) | Mobile conducting unit for a breaker, including a spring for accelerating the separation of arc contacts | |
| CN204289302U (en) | A kind of Sub-gate release device of circuit breaker | |
| CN114300286B (en) | Switch gear | |
| CN112635233B (en) | An operating mechanism for a load switch-fuse combination electrical appliance | |
| CA2024198A1 (en) | Operating mechanism of a high-voltage multipole switch | |
| CN113140429A (en) | Double-acting circuit breaker | |
| CN114400160B (en) | Direct-acting isolation mechanism | |
| CN221946983U (en) | Operating device for switchgear and switchgear | |
| CN214068626U (en) | Interlocking structure of three-station isolation mechanism | |
| US4166938A (en) | Drive for high speed disconnect switch | |
| CN211670138U (en) | Manual and electric integrated three-station mechanism | |
| CN210516512U (en) | Circuit breaker with earthing switch | |
| CN221994331U (en) | Operating device for a switching device and switching device | |
| CN210897048U (en) | Novel emergency brake separating device | |
| CN112951625A (en) | Compact modular switch operating mechanism | |
| CN220341148U (en) | Switching-on/off indicating mechanism of circuit breaker | |
| CN213660274U (en) | Positioning device for electric mechanism for switch | |
| CN213816030U (en) | Operating device and circuit breaker | |
| JP3294464B2 (en) | Circuit breaker operating device and vacuum circuit breaker | |
| CN111564333A (en) | Spring operating mechanism of pole-mounted switch | |
| CN221927810U (en) | Dual-electric three-station operating mechanism | |
| CN218215122U (en) | Switch mechanism and switch cabinet | |
| CN218730761U (en) | Low-energy brake-separating tripping device for circuit breaker operating mechanism | |
| CN220189537U (en) | Switching-on/off indicating structure of pole-mounted circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |