CN112510439A - Misplug-proof wiring terminal - Google Patents
Misplug-proof wiring terminal Download PDFInfo
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- CN112510439A CN112510439A CN202011339548.0A CN202011339548A CN112510439A CN 112510439 A CN112510439 A CN 112510439A CN 202011339548 A CN202011339548 A CN 202011339548A CN 112510439 A CN112510439 A CN 112510439A
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- plug
- identification
- socket
- block
- blocks
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- 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
- H01R13/64—Means for preventing incorrect coupling
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- 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
- H01R13/465—Identification means, e.g. labels, tags, markings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
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- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The application relates to a misplug-proof wiring terminal which comprises a socket and a plug, wherein the socket and the socket are respectively provided with a plug-in positioning component and a plug-in identification component; the inserting positioning component comprises an inserting slot and an inserting block, and the inserting block is matched with the inserting slot; the plug-in identification assembly comprises identification blocks and identification holes, wherein each identification block is respectively matched with one identification hole and is respectively arranged on the connecting surface of the socket and the plug; the plug and the socket are provided with a plurality of groups of mutually adaptive identification blocks and identification holes, and the identification blocks and the identification holes are arranged around the plug blocks and the slots on the plug and the socket. The advantage of this application lies in, in this application, through the mode that sets up the identification block on different group's plugs and the socket, guarantees that plug and socket of the same group can peg graft mutually, adopts this kind of mode, when can effectually preventing the wiring, operates different return circuit sections or non-working area with binding post's plug and socket error, avoids binding post to burn out, arouses the return circuit accident, guarantees power supply safety.
Description
Technical Field
The application relates to the field of manufacturing of terminal boxes in an electric power system, in particular to a misplug-proof wiring terminal.
Background
In an electric power system, a terminal box is widely used in a thermal power plant, a photovoltaic power plant, a wind power plant, a hydraulic power plant, a transformer substation, and a factory, and the terminal box is often used as a passage for connecting outdoor primary and secondary devices. The method has wide application in the aspects of switching construction lines, branch line marking, wiring, line inspection and the like.
The terminal boxes are used for connecting a large number of plug-in terminals. And a plurality of connecting terminals with the same structure are simultaneously installed and disassembled, so that the confusion of the plug and the socket of the connecting terminal is often caused.
In the actual use process, the terminals are frequently mistakenly inserted during wiring, so that the terminals in different loop sections and different working areas are communicated, the terminals are burnt, loop accidents are frequently caused, and the power supply safety is seriously threatened.
Therefore, how to ensure the terminals in the same loop section and the same operation area are correctly connected becomes an urgent problem to be solved in the actual use process of the connection terminal.
Disclosure of Invention
The problem of to above-mentioned problem, this application provides a can effectual definite with preventing misplug binding post of group binding post for solve among the prior art binding post and often appear misplug when the wiring and lead to the condition of the terminal switch-on of different return circuit sections and different work areas, cause binding post to burn out, the condition frequent emergence of return circuit accident, cause serious threat problem for power supply safety. The misplug-proof wiring terminal comprises a socket and a plurality of groups of plugs, each group of plugs is matched with the socket,
the socket and the plug are respectively provided with an inserting positioning component and an inserting identification component;
the inserting positioning assembly comprises an inserting groove and an inserting block, and the inserting block is matched with the inserting groove;
the socket is arranged on the connecting surface of the socket, the plug block is arranged on the connecting surface of the plug, and the socket and the plug are connected through the mutually-matched socket and the plug block;
the plug-in identification assembly comprises identification blocks and identification holes, wherein each identification block is respectively matched with one identification hole and is respectively arranged on the connecting surface of the socket and the plug;
the plug and the socket are provided with a plurality of groups of mutually adaptive identification blocks and identification holes, and the socket and the plug are respectively provided with at least one group of identification blocks and identification holes;
the identification block and the identification hole are arranged around the plug block and the slot on the plug and the socket.
In order to improve the recognition degree between different groups of wiring terminals and improve the connection safety of the wiring terminals, the recognition blocks and the recognition holes on each group of plugs and sockets are mutually matched, at least one recognition block is respectively arranged on each plug or socket, and the recognition blocks on each group of plugs and sockets are arranged at different positions.
Optionally, the slot is a rectangular slot, the insertion block is a rectangular insertion block matched with the slot, the rectangular slot is arranged on the connecting surface of the socket, and the rectangular insertion block is arranged on the connecting surface of the plug.
Optionally, the identification block is a cylindrical identification block, and the identification hole is a cylindrical identification hole adapted to the identification block.
In order to improve the identification degree between the same group of connecting terminals and the connection safety of the connecting terminals, the colors of the plug and the socket in the same group are consistent, and the plug and the socket in different groups are selected with different colors.
In order to realize the connection fixation between the wiring terminals, the connecting grooves are matched with the connecting blocks, and the connecting grooves and the connecting blocks are arranged on two side surfaces of the socket.
Optionally, the socket and the plug are both manufactured by integral injection molding.
In the application, the identification blocks and the identification holes in different numbers are arranged on the plug and the socket in a combined mode of different identification blocks and different identification holes, so that the corresponding uniqueness of each socket and plug is ensured.
The plug and the socket of the same group can be guaranteed to be mutually inserted, when the plug and the socket of different groups are mutually connected, the identification blocks cannot be mutually adapted, therefore, the plug cannot be inserted into the socket, and by adopting the mode, when wiring can be effectively prevented, the plug and the socket errors of the wiring terminals are operated in different loop sections or non-working areas, so that the wiring terminals are prevented from being burnt, loop accidents are caused, and power supply safety is guaranteed.
Meanwhile, the same color is adopted between the same group of plugs and the same group of sockets, and different colors are adopted between different groups of plugs and the same group of sockets for distinguishing, so that the same group of sockets can be effectively identified, different groups of misplug-preventing wiring terminals and the identification of the same group of wiring terminals are increased, and the plugging efficiency is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the entire structure of the misplug-proof terminal shown in the present application;
fig. 2 is an exploded view of the integral components of the mis-plug resistant terminal shown in the present application;
fig. 3 is a schematic structural diagram of the same group of plugs and sockets of the socket setting identification block in the misplug-proof wiring terminal shown in the present application;
fig. 4 is a schematic structural diagram of a plug and a socket in the same group of the plug provided with the identification block in the misplug-proof wiring terminal shown in the application;
fig. 5 is a schematic structural diagram of a plug and a socket in the same group, wherein the plug and the socket in the misplug-proof wiring terminal are both provided with identification blocks;
fig. 6 is a schematic structural diagram of different groups of plugs and sockets of the misplug-proof terminal disclosed in the application.
In the figure, 10-socket, 11-identification block, 101-slot, 20-plug, 21-identification hole and 201-plug block.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In an electric power system, a terminal box is widely used in a thermal power plant, a photovoltaic power plant, a wind power plant, a hydraulic power plant, a transformer substation, and a factory, and the terminal box is often used as a passage for connecting outdoor primary and secondary devices. The method has wide application in the aspects of switching construction lines, branch line marking, wiring, line inspection and the like.
The terminal boxes are used for connecting a large number of plug-in terminals. And a plurality of connecting terminals with the same structure are simultaneously installed and disassembled, so that the confusion of the plug and the socket of the connecting terminal is often caused.
In the actual use process, the terminals are frequently mistakenly inserted during wiring, so that the terminals in different loop sections and different working areas are communicated, the terminals are burnt, loop accidents are frequently caused, and the power supply safety is seriously threatened. Therefore, how to ensure the terminals in the same loop section and the same operation area are correctly connected becomes an urgent problem to be solved in the actual use process of the connection terminal.
As shown in fig. 1, the present application provides a misplug prevention terminal capable of effectively determining the same set of terminals for use in a terminal box, typically using 8-10 different loop segments of the misplug prevention terminal. At present, the appearance of the terminal blocks is basically consistent, so that the terminal blocks are easily mistaken, mistakenly touched and mistakenly plugged in the operation and maintenance process, so that the safety threat to equipment and a power grid is not small, and accidents such as protection damage, switch error jumping, switch failure, personal injury and the like can be even caused.
In contrast, the terminal box in the embodiment of the invention is provided with the misplug-preventing wiring terminal, which can prevent different groups of sockets and plugs from being plugged, and prevent the misplug from causing operation on different loop sections or non-working areas during wiring, thereby realizing the purpose of power supply safety.
As shown in fig. 2, the misplug-proof terminal block of the present application is mainly composed of a socket 10 and a plug 20. The socket 10 and the plug 20 are integrally formed by injection molding. The socket 10 and the plug 20 are in multiple groups, wherein each group of socket 10 and plug 20 is provided with a plug-in positioning component and a plug-in identification component.
The inserting positioning component mainly comprises a slot 101 and an inserting block 201, wherein the slot 101 and the inserting block 201 are both in cuboid shapes, and the rectangular slot is matched with the rectangular inserting block. The rectangular plug block is arranged on the connecting surface of the plug 20, and the rectangular slot is arranged on the connecting surface of the socket 10. The plug 20 and the socket 10 are fixedly connected with the rectangular slot through a rectangular plug block.
The plug-in identification component mainly comprises an identification block 11 and an identification hole 21, wherein the identification block 11 is a cylindrical identification block, and the identification hole 21 is a cylindrical identification hole. Each cylindrical identification block is respectively matched with one cylindrical identification hole, and in each group of the plug 20 and the socket 10, the identification block is arranged on the connecting surface of the plug 20 or the connecting surface of the socket 10, namely at least one identification block is arranged on the socket 10 or the plug 20. The identification block 11 and the identification hole 21 provided on the header 20 and the socket 10 are provided around the rectangular insertion block and the rectangular insertion groove. And each identification block is ensured to have an identification hole matched with the identification block. The identification holes 21 and the identification blocks 11 are arranged, so that the connection between each group of sockets and plugs is unique, errors are prevented, meanwhile, the connection strength between the plugs 20 and the sockets 10 can be effectively improved through the matching connection between the identification blocks 11 and the identification holes 12 arranged on the connection surfaces of the plugs 20 and the sockets 10,
in order to improve the recognition degree between different groups of wiring terminals and improve the safety of connection of the wiring terminals, the positions and the numbers of the recognition blocks 11 and the recognition holes 21 on the plugs 20 and the sockets 10 of different groups are kept different.
In order to improve the identification degree between the same group of wiring terminals and improve the connection safety of the wiring terminals, different colors are selected for the plug 20 and the socket 10 in different groups, and the plug 20 and the socket 10 in the same group have the same color.
In order to realize that the connection between the binding post is fixed, still be equipped with spread groove and connecting block on the mistake proofing binding post of this application, spread groove and connecting block looks adaptation, spread groove and connecting block set up respectively on the both sides face of socket.
In the actual use process, a plurality of sockets 10 are fixedly connected through connecting grooves and connecting blocks arranged on two side surfaces of the sockets 10, after the connection is completed, the connecting blocks are identified through colors, and the inserting blocks 201 belonging to the same group of plugs are inserted into the corresponding inserting grooves 101 to form a connecting terminal row.
The positions and the numbers of the identification blocks 11 and the identification holes 21 on the plugs 20 and the sockets 10 of different groups are different, so that the plugs 20 and the sockets 10 of the same group can be ensured to be mutually inserted, and when the plugs 20 and the sockets 10 of different groups are mutually connected, the identification blocks 11 cannot be mutually adapted, so that the plugs 20 cannot be inserted into the sockets 10, and the correct connection of the terminal blocks is ensured.
Example 1:
as shown in fig. 3, in the present embodiment, a rectangular slot and a rectangular plug block are respectively provided at the center of the connection surface of the plug 20 and the socket 10. Three cylindrical identification blocks are randomly distributed on the socket connecting surface around the rectangular slot.
Three identification holes 21 respectively matched with the three identification blocks 11 on the socket 20 are arranged on the connecting surface of the plug 20 at the position connected with the identification blocks 11.
In the actual use process, after the connection direction is determined by matching and connecting the rectangular slot and the rectangular insertion block, the three identification blocks 11 positioned on the socket are inserted into the identification holes 21 matched with the plug, so that the same group of plug 20 and socket 10 are ensured to be connected, and meanwhile, the connection between the plug 20 and the socket 10 is further limited and fixed.
Example 2:
as shown in fig. 4, in the present embodiment, a rectangular slot and a rectangular plug block are respectively provided at the center of the connection surface of the plug 20 and the socket 10. Two cylindrical identification blocks are randomly distributed on the connecting surface of the plug 20 around the rectangular insertion block.
Two identification holes 21 respectively matched with the two identification blocks 11 on the plug 20 are arranged on the connecting surface of the socket 10 at the position connected with the identification blocks 11.
In the actual use process, after the connection direction is determined by matching and connecting the rectangular slot and the rectangular insertion block, the two identification blocks positioned on the plug are inserted into the identification holes 21 matched with the two identification blocks on the socket, so that the same group of plug 20 and socket 10 are ensured to be connected, and meanwhile, the connection between the plug 20 and the socket 10 is further limited and fixed.
Example 3:
as shown in fig. 5, in the present embodiment, a rectangular slot and a rectangular plug block are respectively provided at the center of the connection surface of the plug 20 and the socket 10.
Three cylindrical identification blocks are randomly distributed on the connecting surface of the plug 20 around the rectangular insertion block, and a circular identification block is distributed on the connecting surface of the socket 10 around the rectangular insertion slot.
Meanwhile, three identification holes 21 respectively matched with the three cylindrical identification blocks on the connecting surface of the plug 20 are formed in the connecting surface of the socket 10 at the position connected with the identification block 11 on the connecting surface of the plug.
An identification hole 21 matched with the cylindrical identification block 11 on the connecting surface of the socket 20 is arranged at the position where the identification block 11 on the connecting surface of the socket is connected on the connecting surface of the plug 20.
In the actual use process, through rectangular slot and rectangular inserted block accordant connection, after the connection direction is determined, an identification block 11 positioned on the socket is inserted into an identification hole 12 arranged on the plug and matched with the plug, three identification blocks 12 positioned on the plug are inserted into three identification holes 11 arranged on the socket and matched with the plug, the same group of plug and socket are ensured to be connected, and meanwhile, the connection between the plug and the socket is further limited and fixed.
In the embodiments 1, 2 and 3, the positions and the numbers of the identification blocks and the identification holes on the plug and the socket in each group are kept different. In the embodiment 1, only three identification blocks are arranged on the socket, in the embodiment 2, only one identification block is arranged on the plug, and in the embodiment 3, identification blocks are arranged on both the plug and the socket.
Therefore, the corresponding uniqueness of each socket and each plug is ensured through different combination modes of the identification block and the identification hole. The plug and the socket in the same group can be ensured to be mutually inserted, and when the plug and the socket in different groups are mutually connected, the identification blocks cannot be mutually matched, so that the plug cannot be inserted into the socket, as shown in fig. 6. By adopting the mode, when wiring is effectively prevented, the errors of the plug and the socket of the wiring terminal are operated in different loop sections or non-working areas, the wiring terminal is prevented from being burnt, loop accidents are avoided, and the power supply safety is ensured.
Meanwhile, because the shape and the structure of each group of plugs and sockets are similar, the same color is adopted between the plugs and the sockets in the same group, and different colors are adopted between the plugs and the sockets in different groups for distinguishing in the connection and use process. The socket of the same group can be effectively identified, the mistaken-plugging preventing wiring terminals of different groups and the identification of the wiring terminals of the same group are increased, and the plugging efficiency is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The misplug-proof wiring terminal is characterized by comprising a socket (10) and plugs (20), wherein the socket (10) and the plugs (20) are in multiple groups, each group of plugs (10) is matched and connected with the socket (20),
the socket (10) and the plug (20) are provided with a plug-in positioning component and a plug-in identification component;
the inserting positioning assembly comprises an inserting groove (201) and an inserting block (101), and the inserting block (101) is matched with the inserting groove (201);
the socket (10) is matched and connected with the plug (20) through the mutually-matched slot (201) and the insertion block (101);
the plug-in identification assembly comprises identification blocks (11) and identification holes (21), wherein each identification block (11) is respectively matched with one identification hole (21) and is respectively arranged on the connecting surface of the socket (10) and the plug (20);
the plug (20) and the socket (10) are provided with a plurality of groups of mutually-matched identification blocks (11) and identification holes (21), and the socket (10) and the plug (20) are respectively provided with at least one group of identification blocks (11) and identification holes (21);
the identification block (11) and the identification hole (21) are arranged around the plug block (101) and the slot (201) on the plug (10) and the socket (20).
2. The misplug-proof terminal block according to claim 1, characterized in that the identification blocks and the identification holes on each group of the plug (20) and the socket (10) are matched with each other, at least one identification block (11) is respectively arranged on the plug (20) and the socket, and the identification blocks (11) on each group of the plug (20) and the socket (10) are arranged at different positions.
3. The misplug-proof connection terminal according to claim 1, characterized in that the slot (201) is a rectangular slot, the plug block (101) is a rectangular plug block adapted to the slot (201), the rectangular slot is arranged on a connection face of the socket (10), and the rectangular plug block is arranged on a connection face of the plug (20).
4. The misplug-proof terminal block according to claim 1, characterized in that the identification block (11) is a cylindrical identification block and the identification hole (21) is a cylindrical identification hole adapted to the identification block (11).
5. The misplug-proof terminal block according to claim 1, characterized in that the same group of the plug (20) and the socket (10) are of the same color, and different groups of the plug (20) and the socket (10) are of different colors.
6. The misplug-proof connection terminal of claim 1, further comprising a connection groove and a connection block, wherein the connection groove and the connection block are adapted to each other, and the connection groove and the connection block are respectively arranged on two side faces of the socket.
7. The misplug-proof terminal block according to claim 1, characterized in that the socket (10) and the plug (20) are made in one piece by injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339548.0A CN112510439A (en) | 2020-11-25 | 2020-11-25 | Misplug-proof wiring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339548.0A CN112510439A (en) | 2020-11-25 | 2020-11-25 | Misplug-proof wiring terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112510439A true CN112510439A (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011339548.0A Pending CN112510439A (en) | 2020-11-25 | 2020-11-25 | Misplug-proof wiring terminal |
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| CN (1) | CN112510439A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010005648A1 (en) * | 1999-12-27 | 2001-06-28 | Naoya Kurimoto | Connector |
| CN201117969Y (en) * | 2007-11-06 | 2008-09-17 | 成都瑞联电气股份有限公司 | Misplug preventing electric connector |
| CN201369458Y (en) * | 2009-01-20 | 2009-12-23 | 太阳神(珠海)电子有限公司 | Anti-theft plug-and-socket component |
| CN203607579U (en) * | 2013-12-11 | 2014-05-21 | 泰崴电子股份有限公司 | Butt-joint connector for magnetic electrical connection device |
| CN206236906U (en) * | 2016-12-20 | 2017-06-09 | 广州供电局有限公司 | Secondary cable connection terminal, secondary small case and switch cubicle |
| CN207651681U (en) * | 2017-11-13 | 2018-07-24 | 江苏吉泰科电气股份有限公司 | A kind of connecting terminal connection structure of controller |
| CN208385753U (en) * | 2018-05-21 | 2019-01-15 | 上海置恒电气有限公司 | A kind of hexagonal coding fool proof column for plug-in terminal |
| CN110635289A (en) * | 2018-06-22 | 2019-12-31 | 进联电子科技(上海)有限公司 | Wiring terminal device of combined jumper and jumper |
-
2020
- 2020-11-25 CN CN202011339548.0A patent/CN112510439A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010005648A1 (en) * | 1999-12-27 | 2001-06-28 | Naoya Kurimoto | Connector |
| CN201117969Y (en) * | 2007-11-06 | 2008-09-17 | 成都瑞联电气股份有限公司 | Misplug preventing electric connector |
| CN201369458Y (en) * | 2009-01-20 | 2009-12-23 | 太阳神(珠海)电子有限公司 | Anti-theft plug-and-socket component |
| CN203607579U (en) * | 2013-12-11 | 2014-05-21 | 泰崴电子股份有限公司 | Butt-joint connector for magnetic electrical connection device |
| CN206236906U (en) * | 2016-12-20 | 2017-06-09 | 广州供电局有限公司 | Secondary cable connection terminal, secondary small case and switch cubicle |
| CN207651681U (en) * | 2017-11-13 | 2018-07-24 | 江苏吉泰科电气股份有限公司 | A kind of connecting terminal connection structure of controller |
| CN208385753U (en) * | 2018-05-21 | 2019-01-15 | 上海置恒电气有限公司 | A kind of hexagonal coding fool proof column for plug-in terminal |
| CN110635289A (en) * | 2018-06-22 | 2019-12-31 | 进联电子科技(上海)有限公司 | Wiring terminal device of combined jumper and jumper |
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Application publication date: 20210316 |
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