CN207183101U - The conversion equipment of dual-power transfer switch - Google Patents
The conversion equipment of dual-power transfer switch Download PDFInfo
- Publication number
- CN207183101U CN207183101U CN201720716826.7U CN201720716826U CN207183101U CN 207183101 U CN207183101 U CN 207183101U CN 201720716826 U CN201720716826 U CN 201720716826U CN 207183101 U CN207183101 U CN 207183101U
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- Prior art keywords
- dual
- power transfer
- rotating disk
- transfer switch
- cap
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Abstract
A kind of conversion equipment of dual-power transfer switch, microswitch including cap and on cap inwall, rotating disk is also articulated with the inwall of the cap, described rotating disk is provided with the drive division and occlusion part being engaged respectively with the handle socket of microswitch and cap, drive division and occlusion part is engaged respectively with microswitch and handle socket so as to realize the mutual switching between dual-power transfer switch automatic mode and manual mode by rotating rotating disk.The utility model on the inner surface of cap by installing rotating disk, during so that working in automatic mode, it is used for manually operated handle socket and is constantly in normally off, is operated manually so as to avoid user under automatic mode state using handle and the problem of cause the internal structure of dual-power transfer switch to be damaged.
Description
Technical field
Low Voltage Electrical Apparatus is the utility model is related to, particularly a kind of conversion equipment of dual-power transfer switch.
Background technology
Dual-power transfer switch is a kind of conventional low-voltage electrical apparatus, is generally used for commonly using oneself between power supply and stand-by power supply
Dynamic or manual switch, so as to ensure when power failure all the way or when stopping power supply, another way power supply can rapid changing-over, with
Ensure the normal power supply of load.Now the twin-power switch electrical equipment of in the market same type can use automatic mode and hand simultaneously at present
Dynamic model formula can simultaneously be switched over by button, but the Manual operation handle jack majority of existing dual-power transfer switch is in
Opening-wide state, if user directly carries out manual switching by the handle socket, the dual power supply conversion under automatic mode is opened
Pass will mutually conflict with manual switch, so as to cause the electrical machinery structure of dual-power transfer switch, control circuit and motor hair
Raw damage, have impact on the Electrical Safety of user and the quality of change-over switch.Certainly, the twin-power switch electrical equipment of some premium brands
The mechanical switching devices of manual auto state are used, to ensure the safe to use of change-over switch, but from its internal structure,
With certain complexity, and cost is higher.
Utility model content
The defects of the purpose of this utility model is to overcome prior art, there is provided a kind of simple in construction, guarantee transform security,
The conversion equipment of lower-cost dual-power transfer switch.
To achieve the above object, the utility model employs following technical scheme：
A kind of conversion equipment of dual-power transfer switch, including cap 1 and the microswitch 3 on the inwall of cap 1,
Also be articulated with rotating disk 2 on the inwall of the cap 1, described rotating disk 2 be provided with respectively with microswitch 3 and the handle of cap 1
The drive division and occlusion part that jack 15 is engaged；By rotate rotating disk make drive division and occlusion part respectively with microswitch 3 and hand
Handle jack 15 is engaged so as to realize the mutual switching between dual-power transfer switch automatic mode and manual mode, i.e., automatic
Occlusion part covers handle socket 15 under pattern and drive division makes the disjunction of microswitch 3, in a manual mode occlusion part and handle
Jack 15 shifts to install and drive division closes microswitch 3.
Optionally, push rod 21 is provided with rotating disk 2, described push rod 21 is slidably mounted in the fan groove 11 of cap 1 simultaneously
Diverse location can be slided into along fan groove 11 so as to drive rotating disk 2 to rotate.
Optionally, described rotating disk 2 is articulated on the inwall of cap 1 by being disposed therein the centre bore 23 in portion, described
Drive division and occlusion part be baffle plate 24 and the push pedal 25 for being separately positioned on the both ends of centre bore 23, described baffle plate 24 is inserted with handle
Hole 15 is oppositely arranged, and described push pedal 25 and the tabletting 31 of microswitch 3 are oppositely arranged.
Optionally, push rod 21 is provided with rotating disk 2, described push rod 21 is described between centre bore 23 and push pedal 25
Push rod 21 be slidably mounted in the fan groove 11 of cap 1, when under automatic mode, described push rod 21 is located at fan groove 11
At the extreme position C of side, and baffle plate 24 is located at the top of handle socket 15 and covers handle socket 15, push pedal 25 with it is micro-
The tabletting 31 of dynamic switch 3 is arranged at intervals, and when under manual mode, push rod 21 is located at the extreme position D of the opposite side of fan groove 11
Place, baffle plate 24 shift to install with handle socket 15 and expose handle socket 15, and push pedal 25 contacts with tabletting 31 and opens fine motion
Close 3 closures.
Optionally, spacing convex closure 22, described limit convex are provided with the side wall of the inwall side of cap 1 in rotating disk 2
22 are wrapped between push rod 21 and centre bore 23, and provided with corresponding with extreme position C and extreme position D respectively on cap 1
Set the first spacing hole 12 and the second spacing hole 13, spacing convex closure 22 can respectively with the first spacing hole 12 and the second spacing hole
13 are engaged.
Optionally, described cap 1 includes the first die cavity 18 and the second die cavity 19, the first described die cavity 18 and Second-Type
Chamber 19 is disposed adjacent, and the switching with dual-power transfer switch is provided with the side wall of the side of the second die cavity 19 in the first die cavity 18
The panel 16 that mechanism is oppositely arranged.
Optionally, axis hole 14 is provided with panel 16, described axis hole 14 is located in handle socket 15 and fan groove 11
Between point, centre bore 23 and the axis hole 14 of the rotating disk 2 are oppositely arranged, and second screw 6 of this conversion equipment is out of panel 16
Side passes sequentially through centre bore 23 and is articulated in rotating disk 2 on the inwall of panel 16 with axis hole 14.
Optionally, described handle socket 15 is located at the middle part of panel 16, the first spacing hole 12 and second of the cap 1
Spacing hole 13 is disposed in parallel in the top of handle socket 15, and described fan groove 11 is arranged on the first spacing hole 12 and the second limit
The top in position hole 13, described microswitch 3 are arranged on handle socket 15 close to the oblique upper of the side of the second die cavity 19 and passed through
Two the first screws 4 are fixed on the edge of panel 16.
Optionally, one end of the tabletting 31 of the microswitch 3 is articulated in side of the microswitch 3 away from panel 16, separately
The end of one end is provided with lug boss 311, and described lug boss 311 and the side wall of push pedal 25 are oppositely arranged.
Optionally, breach 27, described breach 27 and baffle plate are provided with the one end of the centre bore 23 of rotating disk 2 away from push rod 21
24 are disposed adjacent, and the connecting portion 28 that the side wall of prominent rotating disk 2 is set are provided with the one end of push rod 21 away from breach 27, described pushes away
Plate 25 is arranged on connecting portion 28 towards the end of the side of microswitch 3.
The conversion equipment of dual-power transfer switch of the present utility model can be manual by being installed on the inner surface of cap
Switch the rotating disk of dual-power transfer switch mode of operation so that when dual-power transfer switch works in automatic mode, it is used for
Manually operated handle socket is constantly in normally off, is carried out so as to avoid user under automatic mode state using handle
It is manually operated and the problem of cause the internal structure of dual-power transfer switch to be damaged, also ensure that the Electrical Safety of user with
And the quality of dual-power transfer switch, meanwhile, when dual-power transfer switch works in a manual mode, rotating disk can also make handle
Jack is constantly in normally open, does not interfere with the normal work and use of dual-power transfer switch.It is in addition, of the present utility model
Turntable structure is simply easy for installation, operates and understands that cost is relatively low, has good Consumer's Experience.
Brief description of the drawings
Fig. 1 is the partial enlargement structural representation on the inside of cap of the present utility model；
Fig. 2 is the partial enlargement structural representation on the outside of cap of the present utility model；
Fig. 3 is the structural representation of rotating disk of the present utility model；
Fig. 4 is overall structure diagram of the present utility model；
Fig. 5 is the overall structure diagram at another visual angle of the present utility model.
Embodiment
Embodiment of the present utility model is provided below in conjunction with accompanying drawing 1 to 5, further illustrates that dual power supply of the present utility model turns
Change the conversion equipment embodiment of switch.The conversion equipment of dual-power transfer switch of the present utility model is not limited to following
The description of embodiment.
As illustrated in fig. 1 and 2, the conversion equipment of dual-power transfer switch of the present utility model includes cap 1 and installed in shell
Microswitch 3 on the inwall of lid 1, is also articulated with rotating disk 2 on the inwall of the cap 1, described rotating disk 2 be provided with respectively with it is micro-
The drive division and occlusion part that the handle socket 15 of dynamic switch 3 and cap 1 is engaged；Make drive division and occlusion part by rotating rotating disk
It is engaged respectively with microswitch 3 and handle socket 15 so as to realize between dual-power transfer switch automatic mode and manual mode
Mutual switching, i.e., occlusion part covers handle socket 15 in automatic mode and drive division makes the disjunction of microswitch 3, manual
Occlusion part shifts to install with handle socket 15 under pattern and drive division closes microswitch 3.The utility model passes through in cap 1
Inner surface on installation be capable of the rotating disk 2 of manual switching dual-power transfer switch mode of operation so that dual-power transfer switch exists
When being worked under automatic mode, it is used for manually operated handle socket 15 and is constantly in normally off, exists so as to avoid user
It is operated manually under automatic mode state using handle and causes what damaging occurred in the internal structure of dual-power transfer switch to ask
Topic, also ensure that the Electrical Safety of user and the quality of dual-power transfer switch, meanwhile, dual-power transfer switch is in manual mould
When being worked under formula, rotating disk can also make handle socket be constantly in normally open, not interfere with the normal of dual-power transfer switch
Work and use, in addition, turntable structure of the present utility model is simply easy for installation, operates and understand that cost is relatively low, have good
Consumer's Experience.
Specifically, as shown in figure 3, being provided with push rod 21 on rotating disk 2, described push rod 21 is slidably mounted on the fan of cap 1
In shape groove 11 and diverse location can be slided into along fan groove 11 so as to drive rotating disk 2 to rotate, described rotating disk 2 is by being arranged on
Centre bore 23 in the middle part of it is articulated on the inwall of cap 1, and described drive division and occlusion part are to be separately positioned on centre bore 23
The baffle plate 24 at both ends and push pedal 25, described push rod 21 is between centre bore 23 and push pedal 25 close to the side of push pedal 25, institute
The baffle plate 24 stated is oppositely arranged with handle socket 15 and can block handle socket 15 completely, and described push pedal 25 is opened with fine motion
The tabletting 31 of pass 3 is located on same circumference and is oppositely arranged, when this dual-power transfer switch is under automatic mode, push rod 21
At the extreme position C of the side of fan groove 11, and baffle plate 24 is located at the top of handle socket 15 and hides handle socket 15
Lid makes handle socket 15 be in the switch machine that normally off is used to prevent manually operated handle from inserting dual-power transfer switch
In structure, the tabletting 31 of push pedal 25 and microswitch 3 is arranged at intervals and tabletting 31 is located at extreme position A；When needing to carry out
When manual mode operates, stirring push rod 21 makes push rod 21 slide into the opposite side of fan groove 11 from extreme position C along fan groove 11
At extreme position D, while rotating disk 2 is moved in a circle centered on centre bore 23, baffle plate 24 is shifted to install with handle socket 15
And handle socket 15 is completely exposed for grafting handle, push pedal 25 contacts with tabletting 31 and promotes tabletting 31 by extreme position A
Moving at extreme position B closes microswitch 3, and this dual-power transfer switch is by automatic pattern switching to manual mode.When
So, as long as it is contemplated that the above-mentioned action of inverted repeat, i.e., dial to extreme position C by push rod 21 by extreme position D,
Baffle plate 24 is blocked handle socket 15 while tabletting 31 can just resetted, make this dual-power transfer switch by manual mode
Automatic mode is switched to, and the form that push rod can not also be used to stir, and automatic mold is realized by the way of button rotation
The switching of formula and manual mode, it is preferred to use the mode of push rod, can not only simply be combined with rotating disk, and be easy to turn with dual power supply
The Operation switch for changing switch is distinguished.
Especially, spacing convex closure 22, described limit convex are provided with the side wall of the inwall side of cap 1 in rotating disk 2
22 are wrapped between push rod 21 and centre bore 23, and provided with corresponding with extreme position C and extreme position D respectively on cap 1
Set the first spacing hole 12 and the second spacing hole 13, spacing convex closure 22 can respectively with the first spacing hole 12 and the second spacing hole
13 are engaged for rotating disk 2 is spacing so as to ensure the stability of the position of rotating disk 2, i.e., when push rod 21 is located at extreme position C
When, spacing convex closure 22 is engaged with the first spacing hole 12 to be under automatic mode so as to ensure that this dual-power transfer switch is stable
Will not be by external interference；When push rod 21 is located at extreme position D, spacing convex closure 22 is engaged so as to ensure with the second spacing hole 13
This dual-power transfer switch is stable to be under manual mode without being switched to automatic mode.The utility model passes through in rotating disk
Spacing convex closure 22 is set on 2, and being engaged rotating disk 2 with the spacing pore structure on cap 1 by spacing convex closure 22 can stablize
Be maintained at suitable station, so as to ensure that the stability in use of dual-power transfer switch in each of these modes of operation with it is reliable
Property.
As shown in Fig. 3,4 and 5, a specific embodiment of the present utility model, described cap 1 includes double for accommodating
First die cavity 18 of the power circuit breaker of transfer switch and the Second-Type of the controller for accommodating dual-power transfer switch
Chamber 19, the first described die cavity 18 and the second die cavity 19 are disposed adjacent, in the first die cavity 18 close to the side of the side of the second die cavity 19
Wall is provided with the panel 16 being oppositely arranged with the switching mechanism of dual-power transfer switch, and two through holes are provided with the both sides of panel 16
17。
Specifically, as shown in figure 5, described handle socket 15 is located at the middle part of panel 16, the first described spacing hole 12
It is disposed in parallel in the second spacing hole 13 and is arranged on the He of the first spacing hole 12 in the top of handle socket 15, described fan groove 11
The top of second spacing hole 13；Axis hole 14 is additionally provided with panel 16, described axis hole 14 is located at handle socket 15 and fan groove
Between 11 midpoint, centre bore 23 and the axis hole 14 of the rotating disk 2 are oppositely arranged, and second screw 6 of this conversion equipment is from panel
16 inner side passes sequentially through centre bore 23 and is articulated in rotating disk 2 on the inwall of panel 16 with axis hole 14, in rotating disk 2 away from panel 16
The side wall of inwall side is provided with the fixing lug boss 26 set along the outer of centre bore 23, is installed in described fixing lug boss 26
There is pad 5 so as to form bolt mounting structure, the head of second screw 6 is engaged with pad 5 so as to increase stress
Area reduces stress concentration, while also allows for mounting and dismounting, and described microswitch 3 is arranged on handle socket 15 close to second
The oblique upper of the side of die cavity 19 and the edge that panel 16 is fixed on by two the first screws 4, one end pivot joint of the tabletting 31
In side of the microswitch 3 away from panel 16, the end of the other end is provided with the lug boss 311 for being used for buffering and provide the excess of stroke, institute
The lug boss 311 and the side wall of push pedal 25 stated are oppositely arranged.The utility model passes through the end set lug boss in tabletting 31
311, can shorten the contact with tabletting 31 of push pedal 25 distance and certain elastic buffer is provided, while can also increase push pedal 25 with
The accuracy that tabletting 31 is engaged.
As shown in figure 3, breach 27, described breach 27 and the phase of baffle plate 24 are provided with the one end of centre bore 23 away from push rod 21
Neighbour is provided for ensureing that what handle socket 15 can be quick and complete exposes, and prominent turn is provided with the one end of push rod 21 away from breach 27
The connecting portion 28 that the side wall of disk 2 is set, described push pedal 25 be arranged on connecting portion 28 towards the end of the side of microswitch 3 and to
Direction away from the side of panel 16 extends.
As shown in figure 4, at the dual-power transfer switch of the present utility model with automatic mode when, rotating disk 2 is in vertical
State, push rod 21 are located at extreme position C, and described spacing convex closure 22 is located in the first spacing hole 12, and baffle plate 24 is located at second
Handle socket 15 is completely covered by by the lower section of screw 6, and breach 27 is located at the left side of the second screw 6 and the top of baffle plate 24, pushes away
Plate 25 is located at the top of the second screw 6 and located positioned at extreme position E, the lug boss 311 of tabletting 31 to remote microswitch 3 one
Side is obliquely installed and is located at extreme position A；When under this dual-power transfer switch place and automatic mode, rotating disk 2 revolves counterclockwise
Transverse state is in after turning, push rod 21 is located at extreme position D, and spacing convex closure 22 is located in the second spacing hole 13,24, baffle plate
Together handle socket 15 is completely exposed in the right side of the second screw 6 and with the breach 27 positioned at the lower section of the second screw 6, push pedal 25
Move at extreme position F and rear-guard dynamic pressure piece 31 is contacted with lug boss 311 and is moved at extreme position B makes microswitch 3 dynamic
Make.
Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (10)
1. a kind of conversion equipment of dual-power transfer switch, including cap (1) and the microswitch on cap (1) inwall
(3), it is characterised in that：Also be articulated with rotating disk (2) on the inwall of the cap (1), described rotating disk (2) be provided with respectively with it is micro-
The drive division and occlusion part that the handle socket (15) of dynamic switch (3) and cap (1) is engaged；By rotate rotating disk make drive division and
Occlusion part is engaged so as to realize dual-power transfer switch automatic mode and hand with microswitch (3) and handle socket (15) respectively
Mutual switching between dynamic model formula, i.e., occlusion part covers handle socket (15) in automatic mode and drive division makes microswitch
(3) disjunction, occlusion part shifts to install with handle socket (15) in a manual mode and drive division closes microswitch (3).
2. the conversion equipment of dual-power transfer switch according to claim 1, it is characterised in that：It is provided with rotating disk (2)
Push rod (21), described push rod (21) are slidably mounted in the fan groove (11) of cap (1) and can slided along fan groove (11)
To diverse location so as to drive rotating disk (2) rotate.
3. the conversion equipment of dual-power transfer switch according to claim 1, it is characterised in that：Described rotating disk (2) is logical
The centre bore (23) for crossing the portion of being disposed therein is articulated on the inwall of cap (1), and described drive division and occlusion part are to set respectively
The baffle plate (24) at centre bore (23) both ends and push pedal (25) are put, described baffle plate (24) is oppositely arranged with handle socket (15),
Described push pedal (25) and the tabletting (31) of microswitch (3) are oppositely arranged.
4. the conversion equipment of dual-power transfer switch according to claim 3, it is characterised in that：It is provided with rotating disk (2)
Push rod (21), described push rod (21) are located between centre bore (23) and push pedal (25), and described push rod (21) is slidably mounted on
In the fan groove (11) of cap (1), when under automatic mode, described push rod (21) is located at the limit of fan groove (11) side
At the C of position, and baffle plate (24) is located at the top of handle socket (15) and covered handle socket (15), push pedal (25) and fine motion
The tabletting (31) for switching (3) is arranged at intervals；
When under manual mode, push rod (21) is located at the extreme position D of fan groove (11) opposite side, baffle plate (24) and handle
Jack (15) shifts to install and exposes handle socket (15), and push pedal (25) contacts with tabletting (31) and closes microswitch (3)
Close.
5. the conversion equipment of dual-power transfer switch according to claim 4, it is characterised in that：In rotating disk (2) close to shell
The side wall for covering the inwall side of (1) is provided with spacing convex closure (22), and described spacing convex closure (22) is located at push rod (21) and center
Between hole (23), and the first spacing hole being correspondingly arranged respectively with extreme position C and extreme position D is provided with cap (1)
(12) can match respectively with the first spacing hole (12) and the second spacing hole (13) with the second spacing hole (13), spacing convex closure (22)
Close.
6. the conversion equipment of dual-power transfer switch according to claim 1, it is characterised in that：Described cap (1) bag
The first die cavity (18) and the second die cavity (19) are included, described the first die cavity (18) and the second die cavity (19) are disposed adjacent, first
Side wall of the die cavity (18) close to the second die cavity (19) side is provided with what is be oppositely arranged with the switching mechanism of dual-power transfer switch
Panel (16).
7. the conversion equipment of dual-power transfer switch according to claim 6, it is characterised in that：It is provided with panel (16)
Axis hole (14), described axis hole (14) are located between the midpoint of handle socket (15) and fan groove (11), in the rotating disk (2)
Heart hole (23) is oppositely arranged with axis hole (14), during second screw (6) of this conversion equipment passes sequentially through on the inside of panel (16)
Rotating disk (2) is articulated on the inwall of panel (16) by heart hole (23) with axis hole (14).
8. the conversion equipment of dual-power transfer switch according to claim 6, it is characterised in that：Described handle socket
(15) it is located at the middle part of panel (16), the first spacing hole (12) and the second spacing hole (13) of the cap (1) are disposed in parallel in
The top of handle socket (15), the fan groove (11) of the cap (1) are arranged on the first spacing hole (12) and the second spacing hole
(13) top, described microswitch (3) are arranged on the oblique upper of close second die cavity (19) side of handle socket (15) simultaneously
The edge of panel (16) is fixed on by two the first screws (4).
9. the conversion equipment of dual-power transfer switch according to claim 6, it is characterised in that：The microswitch (3)
Tabletting (31) one end be articulated in microswitch (3) away from panel (16) side, the end of the other end is provided with lug boss
(311), described lug boss (311) and the side wall of push pedal (25) are oppositely arranged.
10. the conversion equipment of dual-power transfer switch according to claim 4, it is characterised in that：At the center of rotating disk (2)
The one end of hole (23) away from push rod (21) is provided with breach (27), and described breach (27) is disposed adjacent with baffle plate (24), in push rod
(21) one end away from breach (27) is provided with the connecting portion (28) that the side wall of prominent rotating disk (2) is set, and described push pedal (25) is set
Put the end towards microswitch (3) side in connecting portion (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720716826.7U CN207183101U (en) | 2017-06-20 | 2017-06-20 | The conversion equipment of dual-power transfer switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720716826.7U CN207183101U (en) | 2017-06-20 | 2017-06-20 | The conversion equipment of dual-power transfer switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207183101U true CN207183101U (en) | 2018-04-03 |
Family
ID=61735194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720716826.7U Active CN207183101U (en) | 2017-06-20 | 2017-06-20 | The conversion equipment of dual-power transfer switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207183101U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220682A (en) * | 2021-12-30 | 2022-03-22 | 雷顿电气科技有限公司 | Manual-automatic switching mechanism of automatic change-over switch |
| CN114220681A (en) * | 2021-12-30 | 2022-03-22 | 雷顿电气科技有限公司 | Manual and automatic operation mechanism of automatic change-over switch |
-
2017
- 2017-06-20 CN CN201720716826.7U patent/CN207183101U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220682A (en) * | 2021-12-30 | 2022-03-22 | 雷顿电气科技有限公司 | Manual-automatic switching mechanism of automatic change-over switch |
| CN114220681A (en) * | 2021-12-30 | 2022-03-22 | 雷顿电气科技有限公司 | Manual and automatic operation mechanism of automatic change-over switch |
| CN114220681B (en) * | 2021-12-30 | 2023-09-15 | 雷顿电气科技有限公司 | Manual and automatic operating mechanism of automatic change-over switch |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of utility model: Conversion device of double power transfer switch Granted publication date: 20180403 License type: Common License Record date: 20201021 |