CN108879260A - A kind of mechanical interlocks suitable for different current plug and sockets - Google Patents
A kind of mechanical interlocks suitable for different current plug and sockets Download PDFInfo
- Publication number
- CN108879260A CN108879260A CN201810922156.3A CN201810922156A CN108879260A CN 108879260 A CN108879260 A CN 108879260A CN 201810922156 A CN201810922156 A CN 201810922156A CN 108879260 A CN108879260 A CN 108879260A
- Authority
- CN
- China
- Prior art keywords
- kelly
- plug
- actuator
- socket
- sliding
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
Abstract
The invention discloses a kind of mechanical interlocks suitable for different current plug and sockets, including installing panel, socket, interlocking mechanism, actuator, the socket is set on installation panel, the interlocking mechanism includes fixed plate, slide kelly, active blade, the fixed plate is equipped with sliding kelly and the sliding kelly can horizontally slip in fixed plate, described sliding kelly one end is equipped with positive stop key, the sliding kelly is linked with actuator, the actuator is connect with breaker, described active blade one end is set on installation panel, the other end is set at the keyway of socket, the positive stop key is set to active blade side, card is additionally provided on the sliding kelly, the card is the protrusion structure close to positive stop key and the card can block plug head when sliding kelly and sliding to left side.Beneficial effects of the present invention are：Can ensure that could plug plug when main circuit is without electricity, it is ensured that Electrical Safety；Adapt to the operating conditions such as more sockets while power supply.
Description
Technical field
The present invention relates to a kind of socket for industry, and in particular to a kind of machine of the plugs and sockets suitable for different current specifications
Tool interlock.
Background technique
Industrial use large-capacity electrical apparatus perhaps the applications such as port and pier by plug be inserted into socket when or
When plug is extracted socket, it is also easy to produce electric arc in the case where hot line job, easily electric elements or operator are damaged.
Take electrical interlocking device in the prior art to keep plug operation not charged, howeverWhenThe mechanical action time of electric elements is less than
Circuit contacts（Electrode）When the separating action time, be easy to produce the operating process to pull the plug out of the socket be still within charged state or
The unsafe conditions such as plug are inserted under electriferous state.
Summary of the invention
The purpose of the present invention is to provide a kind of mechanical interlocks, realize machine with a control breaker and 1 socket
Tool interlocking, or the case where use needs with a control breaker with it is multiple（1~3）Socket realizes mechanical interlocking, really
When guarantor's operation plug insertion socket connects electricity or plug extraction socket, power source circuit switch is in an off state, and does not generate electrification
Operation prevents the injury of the dangerous generation or the generation of electric arc of hot line job to electric elements or operator.Moreover, of the invention
This mechanical interlocks can not only be with smaller current socket（Such as 32A to 125A）It can also be with the socket of high current（Such as
250A to 1250A）Realize mechanical interlocking.
For this reason, the technical scheme adopted by the present invention is that：A kind of mechanical interlocks suitable for different current plug and sockets,
Including installing panel, socket, interlocking mechanism, actuator, the socket is set on installation panel, and the interlocking mechanism includes fixing
Plate, sliding kelly, active blade, the fixed plate is equipped with sliding kelly and the sliding kelly can be slided left and right in fixed plate
Dynamic, described sliding kelly one end is equipped with positive stop key, and the sliding kelly other end is connected with convex block, is equipped in the convex block recessed
Slot, the actuator are connected with turning wheel, and the turning wheel, which is equipped with, stirs pin, it is described stir pins position in groove and with it is described
Groove is linked, and the actuator is connect with breaker, and described active blade one end is set on installation panel, and the other end is set to
At the keyway of socket, the positive stop key is set to active blade side, is additionally provided with card on the sliding kelly, the card for by
The protrusion structure of the nearly positive stop key and card can block plug head and prevent plug from extracting when sliding kelly and sliding to left side.
Preferably, the installation panel is equipped with fixed block, sets holddown spring in the fixed block, the holddown spring with
The connection of active blade one end, the active blade are close to install panel under the action of holddown spring.
Preferably, the socket and interlocking mechanism are one or more groups of, and the socket and interlocking gear correspond.
Preferably, the installation panel is equipped with breaker installation support, and the breaker is consolidated by breaker installation support
It is fixed.
Preferably, the actuator is fixedly connected with turning wheel, and the actuator is strip, and the actuator rotation can
Control the disconnection and closure of breaker.
Preferably, the fixed plate is equipped with sliding groove, and the sliding kelly horizontally slips in sliding groove.
Preferably, when plug is not inserted into socket, active blade is close to installation panel by spring pressure effect is compressed, and is passed through
Positive stop key limit slippage kelly slides to the left, and actuator makes breaker be in off-position；Work is opened when a plug is to be inserted into the socket
Dynamic baffle, positive stop key are not limited by active blade, and sliding kelly slides to the left, and actuator rotation makes closing of power circuit breaker.
Preferably, when being inserted into plug, the limitation that activity sliding kelly is detached from positive stop key is opened, sliding kelly is slided to the left
Dynamic, card, which snaps into keyhole, extract plug can not；When rotary dial wheel, when actuator disconnects breaker, stirs pin and push cunning
Dynamic kelly slides to the right, and card, which moves to right, leaves keyhole, and plug can be extracted.
Compared with prior art, beneficial effects of the present invention are：
1. can ensure that could plug plug when main circuit is without electricity, safety measure be it is enforceable, when will not be due to circuit operation
Between etc. factors influence, it is ensured that Electrical Safety.
2. this mechanical interlocks of the invention can not only be with smaller current socket（Such as 32A to 125A）It can also be with
The socket of high current（Such as 250A to 1250A）Realize mechanical interlocking.
3. the present invention can make breaker and socket realize that mechanical interlocking is 1 pair of 1 socket, be also possible to 1 pair of 2 socket,
1 pair of 3 socket, adapt to machine on more cables（Or it goes on board）Etc. the operating conditions such as more sockets while power supply.
4. technical solution of the present invention makes the exhaust position of breaker and socket be suitable for applying working condition and facilitate operation.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the structural schematic diagram of cross section in Fig. 1 of the present invention.
Fig. 3 is structural schematic diagram when breaker of the present invention disconnects.
Structural schematic diagram when Fig. 4 is breaker of the present invention connection.
Fig. 5 is the structural schematic diagram of the embodiment of the present invention two.
Fig. 6 is the structural schematic diagram of the embodiment of the present invention three.
Fig. 7 is the side view of Fig. 1 of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment one
As shown in figures 1 and 2, a kind of mechanical interlocks suitable for different current plug and sockets, including installation panel 1, socket 2,
Interlocking mechanism 3, actuator 4, the socket 2 are set on installation panel 1, and the interlocking mechanism 3 includes fixed plate 31, sliding kelly
32, active blade 33, the fixed plate 31 is equipped with sliding kelly 32 and the sliding kelly 32 can control in fixed plate 31
Sliding, described 32 one end of sliding kelly are equipped with positive stop key 34, and 32 other end of sliding kelly is connected with convex block 35, the convex block
Groove 36 is equipped in 35, the actuator 4 is connected with turning wheel 5, and the turning wheel 5 is equipped with and stirs pin 6, described to stir pin 6
It is linked in groove 36 and with the groove 36, the actuator 4 is connect with breaker 7, the active blade 33 1
End is set on installation panel 1, and the other end is set at the keyway 21 of socket 2, and the positive stop key 34 is set to 33 side of active blade, institute
It states and is additionally provided with card 37 on sliding kelly 32, the card 37 is close to the protrusion structure of positive stop key 34 and when sliding kelly 32 is sliding
The card 37 can block 22 front end of plug when to the left.
The installation panel 1 is equipped with fixed block 38, sets holddown spring 39, the holddown spring 39 in the fixed block 38
It is connect with 33 one end of active blade, the active blade 33 is close to install panel 1 under the action of holddown spring 39.
The socket 2 and interlocking mechanism 3 are one group.
The installation panel 1 is equipped with breaker installation support 8, and the breaker 7 is fixed by breaker installation support 8.
The actuator 4 is fixedly connected with turning wheel 5, and the actuator 4 is strip, 4 rotary steerable of actuator
The disconnection and closure of breaker 7 processed.
The fixed plate 31 is equipped with sliding groove, and the sliding kelly 32 horizontally slips in sliding groove.
In use process, as shown in figure 3, active blade 33 is compressed when actuator 4 is in the position that breaker 7 disconnects
Installation panel 1 is close in the effect of 39 pressure of spring, the lower part of active blade 33, and active blade 33 is in socket keyhole front position,
The positive stop key 34 of sliding kelly withstands on the side of active blade, prevents interlocking mechanism from sliding kelly and slides to the left, breaker actuating
Device cannot operate, i.e., actuator can not pull downwards rotation, and therefore, breaker is in the state of without there is plug to be inserted into socket
The state of power-off, it is ensured that the plug insertion not charged operating breaker of socket is in an off state.
As shown in figure 4, when a plug is to be inserted into the socket, plug opens active blade, at this moment slide the positive stop key of kelly not by
Limitation, sliding kelly can slide to the left, and breaker actuator can pull downwards rotation, make breaker closing, while interlocking machine
There is card to block plug keyhole on structure sliding kelly, prevents plug from extracting.
When plug will extract socket, it is necessary to first pull actuator, breaker is made to be in an off state position, slide kelly
Mobile, card is also detached from the position for blocking plug head, plug is enable to extract, it is ensured that without electrically operated when plug is transferred to.
Embodiment two
As shown in figure 5, other are same as Example 1, the difference is that interlocking mechanism and socket are two groups, interlocking mechanism is restricted simultaneously
In two active blades, when only 2 plugs are inserted into simultaneously, all active blades are removed, and actuator can operate, and can make to break
Road device closes a floodgate, while the sliding kelly of Liang Ge interlocking mechanism blocks each plug head by card respectively, prevents plug from extracting.
When plug will extract socket, it is necessary to first pull actuator, breaker is made to be in an off state position, at this moment interlocking mechanism two
Card on sliding kelly is detached from the position for blocking plug head respectively, and each plug is enable to extract.
Embodiment three
As shown in fig. 6, other are same as Example 1, the difference is that interlocking mechanism and socket are three groups, interlocking mechanism is restricted simultaneously
In three active blades, when only 3 plugs are inserted into simultaneously, all active blades are removed, and actuator can operate, and can make to break
Road device closes a floodgate, while the sliding kelly of three interlocking mechanisms blocks each plug head by card respectively, prevents plug from extracting.
When plug will extract socket, it is necessary to first pull actuator, breaker is made to be in an off state position, at this moment interlocking mechanism three
Card on sliding kelly is detached from the position for blocking plug head respectively, and each plug is enable to extract.
The present invention, which can be used for the socket that the occasions such as industrial use and port and pier use, needs mechanical interlocking control safely
The electric device of system is especially used for the crane power-on box of larger capacity, while can connect electricity as bank ship（It connects on the bank
Electric power network power supply）Shore connection box be used.
The capacitance that the present apparatus connects electricity can be larger, in voltage 1000V hereinafter, electric current can be from 32A to 125A or 250A
Control breaker and accessory power outlet to the accessory power outlet of 1250A carry out mechanical interlocking.The present invention solves large and small current plug and inserts
Seat plug meet the mechanical electric safety standard of international IEC and China's GB standard there are problems.
The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；Although referring to aforementioned each reality
Applying example, invention is explained in detail, those skilled in the art should understand that：It still can be to aforementioned each
Technical solution documented by embodiment is modified, or equivalent substitution of some or all of the technical features；And
These are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of mechanical interlocks suitable for different current plug and sockets, which is characterized in that including installing panel（1）, insert
Seat（2）, interlocking mechanism（3）, actuator（4）, the socket（2）Set on installation panel（1）On, the interlocking mechanism（3）Including
Fixed plate（31）, sliding kelly（32）, active blade（33）, the fixed plate（31）It is equipped with sliding kelly（32）And the cunning
Dynamic kelly（32）It can be in fixed plate（31）On horizontally slip, the sliding kelly（32）One end is equipped with positive stop key（34）, the cunning
Dynamic kelly（32）The other end is connected with convex block（35）, the convex block（35）It is interior to be equipped with groove（36）, the actuator（4）It is connected with
Turning wheel（5）, the turning wheel（5）It is equipped with and stirs pin（6）, described to stir pin（6）Positioned at groove（36）It is interior and with it is described recessed
Slot（36）It is linked, the actuator（4）With breaker（7）Connection, the active blade（33）One end is set to installation panel
（1）On, the other end is set to socket（2）Keyway（21）Place, the positive stop key（34）Set on active blade（33）Side, the cunning
Dynamic kelly（32）On be additionally provided with card（37）, the card（37）For close to positive stop key（34）Protrusion structure and when sliding kelly
（32）Slide to card when left side（37）Plug can be blocked（22）Front end.
2. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that described
Panel is installed（1）It is equipped with fixed block（38）, the fixed block（38）Inside set holddown spring（39）, the holddown spring（39）With
Active blade（33）One end connection, the active blade（33）In holddown spring（39）Under the action of be close to installation panel（1）.
3. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that described
Socket（2）And interlocking mechanism（3）To be one or more groups of, the socket and interlocking gear are corresponded.
4. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that described
Panel is installed（1）It is equipped with breaker installation support（8）, the breaker（7）By breaker installation support（8）It is fixed.
5. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that described
Actuator（4）With turning wheel（5）It is fixedly connected, the actuator（4）For strip, the actuator（4）Rotary steerable system is disconnected
Road device（7）Disconnection and closure.
6. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that described
Fixed plate（31）It is equipped with sliding groove, the sliding kelly（32）It horizontally slips in sliding groove.
7. the mechanical interlocks according to claim 1 suitable for different current plug and sockets, which is characterized in that when slotting
Head（22）It is not inserted into socket（2）When, active blade（33）By holddown spring（39）Installation panel is close in pressure effect（1）, pass through
Positive stop key（34）Limit slippage kelly（32）It slides to the left, actuator（4）Make breaker（7）In off-position；Work as plug
（22）It is inserted into socket（2）Shi Dingkai active blade（33）, positive stop key（34）Not by active blade（33）Kelly is slided in limitation（32）
It slides to the left, actuator（4）Rotation makes breaker（7）It connects.
8. the mechanical interlocks according to claim 1 or claim 7 suitable for different current plug and sockets, which is characterized in that
When insertion plug（22）When, slide kelly（32）It slides to the left, card（37）Snap into keyhole（23）Make plug（22）It can not extract；
When rotary dial wheel（5）, actuator（4）Make breaker（7）When disconnection, pin is stirred（6）Push sliding kelly（32）It slides to the right,
Card（37）It moves to right and leaves keyhole（23）, plug（22）It can extract.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922156.3A CN108879260B (en) | 2018-08-14 | 2018-08-14 | Mechanical interlocking device suitable for plugs and sockets with different currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810922156.3A CN108879260B (en) | 2018-08-14 | 2018-08-14 | Mechanical interlocking device suitable for plugs and sockets with different currents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108879260A true CN108879260A (en) | 2018-11-23 |
| CN108879260B CN108879260B (en) | 2023-08-22 |
Family
ID=64317984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810922156.3A Active CN108879260B (en) | 2018-08-14 | 2018-08-14 | Mechanical interlocking device suitable for plugs and sockets with different currents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879260B (en) |
Citations (14)
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|---|---|---|---|---|
| GB2068651A (en) * | 1980-01-19 | 1981-08-12 | Mk Electric Ltd | Improvements relating to electrical socket outlets |
| CN2228685Y (en) * | 1995-03-13 | 1996-06-05 | 天津市第六电器开关厂 | Step interlocking false operation proof switch for machine-room |
| CN2729891Y (en) * | 2004-09-25 | 2005-09-28 | 汕头正超电气有限公司 | Shutting releasing device for VSI circuit breaker in fixed switch cubicle |
| CN200953291Y (en) * | 2006-09-12 | 2007-09-26 | 上海电器股份有限公司人民电器厂 | Interlocking device for draw type plastic case circuit breaker |
| US20110233034A1 (en) * | 2010-03-23 | 2011-09-29 | Ls Industrial Systems Co., Ltd. | Plug interlock device for vacuum circuit breaker |
| CN102227055A (en) * | 2011-03-23 | 2011-10-26 | 江苏华冠电器集团有限公司 | Secondary interlocking mechanism of switch cabinet |
| CN102769236A (en) * | 2012-01-06 | 2012-11-07 | 佛山市海默工业技术有限公司 | Mechanical interlocking socket |
| CN202601860U (en) * | 2012-06-08 | 2012-12-12 | 内蒙古东部电力有限公司通辽电业局 | Misoperation-preventive locking device of grounding pile |
| CN105070556A (en) * | 2015-07-29 | 2015-11-18 | 武汉中直电气股份有限公司 | Direct current fast breaker handcart advancing interlocking device |
| CN205159150U (en) * | 2015-10-20 | 2016-04-13 | 珠海沃顿电气有限公司 | Maloperation interlock is prevented to circuit breaker |
| CN205264543U (en) * | 2016-01-05 | 2016-05-25 | 山东泰开成套电器有限公司 | Circuit breaker and secondary plug socket interlock |
| WO2017023111A2 (en) * | 2015-08-03 | 2017-02-09 | 공주대학교 산학협력단 | Socket outlet and interlock device for socket outlet |
| CN206864770U (en) * | 2017-05-19 | 2018-01-09 | 建德鑫鼎纤维材料有限公司 | It is a kind of power off safely push away Weft handling device |
| CN108011261A (en) * | 2017-12-07 | 2018-05-08 | 黄均杰 | A kind of household wall electrical source socket |
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2018
- 2018-08-14 CN CN201810922156.3A patent/CN108879260B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2068651A (en) * | 1980-01-19 | 1981-08-12 | Mk Electric Ltd | Improvements relating to electrical socket outlets |
| CN2228685Y (en) * | 1995-03-13 | 1996-06-05 | 天津市第六电器开关厂 | Step interlocking false operation proof switch for machine-room |
| CN2729891Y (en) * | 2004-09-25 | 2005-09-28 | 汕头正超电气有限公司 | Shutting releasing device for VSI circuit breaker in fixed switch cubicle |
| CN200953291Y (en) * | 2006-09-12 | 2007-09-26 | 上海电器股份有限公司人民电器厂 | Interlocking device for draw type plastic case circuit breaker |
| US20110233034A1 (en) * | 2010-03-23 | 2011-09-29 | Ls Industrial Systems Co., Ltd. | Plug interlock device for vacuum circuit breaker |
| CN102227055A (en) * | 2011-03-23 | 2011-10-26 | 江苏华冠电器集团有限公司 | Secondary interlocking mechanism of switch cabinet |
| CN102769236A (en) * | 2012-01-06 | 2012-11-07 | 佛山市海默工业技术有限公司 | Mechanical interlocking socket |
| CN202601860U (en) * | 2012-06-08 | 2012-12-12 | 内蒙古东部电力有限公司通辽电业局 | Misoperation-preventive locking device of grounding pile |
| CN105070556A (en) * | 2015-07-29 | 2015-11-18 | 武汉中直电气股份有限公司 | Direct current fast breaker handcart advancing interlocking device |
| WO2017023111A2 (en) * | 2015-08-03 | 2017-02-09 | 공주대학교 산학협력단 | Socket outlet and interlock device for socket outlet |
| CN205159150U (en) * | 2015-10-20 | 2016-04-13 | 珠海沃顿电气有限公司 | Maloperation interlock is prevented to circuit breaker |
| CN205264543U (en) * | 2016-01-05 | 2016-05-25 | 山东泰开成套电器有限公司 | Circuit breaker and secondary plug socket interlock |
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| CN108011261A (en) * | 2017-12-07 | 2018-05-08 | 黄均杰 | A kind of household wall electrical source socket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108879260B (en) | 2023-08-22 |
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