CN108199168B - Rectangular differential circuit electric connector for high-speed motor car - Google Patents
Rectangular differential circuit electric connector for high-speed motor car Download PDFInfo
- Publication number
- CN108199168B CN108199168B CN201711486847.5A CN201711486847A CN108199168B CN 108199168 B CN108199168 B CN 108199168B CN 201711486847 A CN201711486847 A CN 201711486847A CN 108199168 B CN108199168 B CN 108199168B
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- grid
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- housing
- electrical connector
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 3
- 230000009545 invasion Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
-
- 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
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- 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
- H01R13/02—Contact members
- H01R13/10—Sockets for co-operation with pins or blades
-
- 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
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/42—Securing in a demountable manner
-
- 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
- H01R13/46—Bases; Cases
- H01R13/516—Means for holding or embracing insulating body, e.g. casing, hoods
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
Abstract
The invention provides a rectangular differential circuit electric connector for a high-speed motor car, which comprises a plug shell, a socket shell, a cable, a shielding layer fixing part and a contact piece, wherein the structure and the requirements of the differential circuit are met, the structure of the electric connector can be used for safely and reliably connecting and transmitting corresponding control current signals and communication network signals, the connection of a plurality of paths of differential circuits can be realized through an additional arrangement device, the detachable contact piece is used, the disassembly and the installation are convenient, the shielding layer of the cable and the cable are externally laminated at the fixing part of an all-metal shell, so that a complete shielding field is formed in the shell pair, the invasion of an external interference source is avoided, and meanwhile, the overflow of the signals in the shielding field to the outside is also inhibited.
Description
Technical Field
The invention belongs to the technical field of electric connectors, and particularly relates to a rectangular differential circuit electric connector for a high-speed motor car.
Background
In the process of developing high-speed trains in China, the phenomena of distortion, interruption and incompleteness of control signals and electric signals in the running process of the trains are found. The structure and arrangement of electrical connectors and cables (wires) have been found, by analysis, experimentation and inspection, to be inherently incomplete and effective in protecting against various sources of interference. The electrical connectors of the general type are only responsible for the connection and transmission of the electrical circuit or other signal paths, and thus, the interference and attack on the interaction of the electrical circuit itself is very important. In the transmission of various electrical signals, the electrical radiation generated by different types of signal sources can severely interfere with the various control systems in which the circuit itself is located.
Therefore, how to design a differential electrical connector that can omnidirectionally shield, suppress the interference and attack of the signals during the transmission process, and control the attenuation of the signals within an acceptable range is a need in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the rectangular differential circuit electric connector for the high-speed motor car, which meets the structure and the requirements of a differential circuit, and the structure of the electric connector can be used for safely and reliably connecting and transmitting corresponding control current signals and communication network signals, and the connection of a plurality of paths of differential circuits can be realized through an additional arrangement device.
In order to solve the problems, the invention adopts the following technical scheme:
a rectangular differential circuit electrical connector for high speed motor vehicles, comprising:
the plug comprises a plug shell, a first grid, a second grid, a first cable and a shielding layer fixing part, wherein the first grid and the second grid are arranged in the plug shell;
the socket comprises a socket shell, a third grid, a fourth grid, a second cable and a shielding layer fixing part, wherein the third grid and the fourth grid are arranged in the socket shell and correspond to the first grid and the second grid respectively; and
and the contact pieces are connected with the cable and are respectively arranged in the grids.
Further, the contact piece comprises a detachable contact pin and a detachable jack, wherein the contact piece arranged in the first grid and the second grid is a detachable contact pin or a jack, and the contact piece correspondingly arranged in the third grid and the fourth grid is a jack or a contact pin.
Further, the first grid and the second grid can be longitudinally arranged in plurality for meeting the requirement of the multi-path differential circuit.
Further, the longitudinal arrangement number of the third grid and the fourth grid is consistent with that of the first grid and the second grid.
Further, the upper and lower parts of the housing are provided with connection fixing parts for fixing the upper and lower electric connectors
Furthermore, the plug shell and the socket shell are aluminum pieces, and conductive metal plating layers are arranged on the surfaces of the shells.
Further, the first cable, the second cable and the shielding layer are provided with plastic part hole sites, after the differential two-core cable is in pressure connection with the contact part, the cable is arranged in the plastic part hole sites, and the shielding layer and the cable are externally laminated and in pressure connection with the shell.
Further, the first, second, third and fourth grids are made of the same material as the housing.
Further, the plug housing and the receptacle housing are sealed with a seal after connection such that the housing forms a complete shield field to the interior thereof.
Further, the housing and the grid are rectangular.
The invention has the beneficial effects that:
(1) The connection of the multipath differential circuits is realized through an additional arrangement device;
(2) The detachable contact piece is used, so that the disassembly and the assembly are convenient;
(3) The shielding layer of the cable and the cable outer layer are laminated at the fixed position of the all-metal shell, so that a complete shielding field is formed in the shell pair, the invasion of an external interference source is avoided, and meanwhile, the overflow of signals in the shielding field to the outside is also inhibited.
Drawings
Fig. 1 is a schematic diagram of a plug.
Fig. 2 is a schematic diagram of a socket.
Fig. 3 is a cross-sectional view of a set of rectangular electrical connectors.
Fig. 4 is a cross-sectional view of a plurality of sets of rectangular electrical connectors.
Wherein, 1, plug shell 2, cable and shielding layer fixed part 3, can dismantle contact pin 4, socket shell 5, can dismantle the jack.
Detailed Description
In order to enable those skilled in the art to better understand the technical scheme of the present invention, the present invention will be further described in detail with reference to specific embodiments. It is noted that the embodiments described below are exemplary only for explaining the present invention, and are not to be construed as limiting the present invention. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the whole microelectronic signal circuit design, the microelectronic signal is subjected to differential circuit design, so that the coupling electromagnetic fields between the wires are approximately equal in amplitude and opposite in polarity, and the electromagnetic fields in the microelectronic signal circuit are balanced and offset, thereby reducing the electromagnetic interference to the outside.
According to one aspect of the present invention, the present invention provides a rectangular differential circuit electrical connector for a high-speed motor vehicle, fig. 1 is a plug schematic diagram, fig. 2 is a socket schematic diagram, and as shown in fig. 1 and 2, the rectangular differential circuit electrical connector includes a plug housing 1, a socket housing 4, a cable and shield layer fixing portion 2, and contacts.
According to the embodiment of the invention, the plug housing 1 and the socket housing 4 are aluminum pieces, and the surfaces of the aluminum pieces are provided with conductive metal plating layers, so that external electromagnetic radiation flux can be quickly transmitted to the grounding device through the surfaces, and meanwhile, internal electromagnetic leakage is controlled within an acceptable range.
According to the embodiment of the invention, the first grid and the second grid arranged in the plug housing 1, and the third grid and the fourth grid which are arranged in the socket housing and respectively correspond to the first grid and the second grid are made of the same materials as the housing, and the reason that the same materials are adopted here is that the manufacturing is convenient, and of course, other metals can be adopted to realize a shielding field.
According to a specific embodiment of the present invention, as shown in fig. 1 and fig. 2, the contact elements are connected with the cable and are respectively arranged in the grids, the connection mode is preferably crimping, in some preferred embodiments of the present invention, the contact elements include a detachable pin 3 and a detachable jack 5, wherein the contact elements arranged in the first grid and the second grid are detachable pin 3 or jack 5, the contact elements correspondingly arranged in the third grid and the fourth grid are jack 5 or pin 3, and the pins are mutually matched with the jack to realize signal transmission.
The connection mode of the contact element and the cable and the specific characteristics of the contact element are not particularly required, the technology is a preferred embodiment, and other modes capable of realizing the same function can be adopted.
According to a specific embodiment of the invention, a first cable and shielding layer fixing part arranged at one end of the plug shell and a second cable and shielding layer fixing part arranged at one end of the socket shell are provided with plastic part hole sites, after the differential two-core cable is in pressure connection with the contact part, the cable is arranged in the plastic part hole sites, and the shielding layer and the cable of the cable are externally laminated in pressure connection with the shell.
According to a specific embodiment of the present invention, fig. 3 is a cross-sectional view of a set of rectangular electrical connectors, fig. 4 is a cross-sectional view of a plurality of sets of rectangular electrical connectors, as shown in fig. 3 and fig. 4, the first grid and the second grid may be longitudinally arranged in plurality for meeting the requirements of the multi-path differential circuit, and correspondingly, the longitudinal arrangement number of the third grid and the fourth grid is consistent with that of the first grid and the second grid, and the connection of the multi-path differential circuit is realized through the longitudinal arrangement of the connectors.
In the embodiment of the multiple sets of rectangular electric connectors, the upper surface and the lower surface of the electric connectors are provided with connection fixing devices for fixing the upper electric connector and the lower electric connector, and the connection fixing devices are not particularly limited as long as the fixing of the two electric connectors is realized, preferably, in some specific embodiments of the invention, the connection of the two electric connectors is realized in a clamping groove mode.
According to an embodiment of the invention, the plug housing and the receptacle housing are sealed after connection using a seal such that the housing forms a complete shield field to the interior thereof, wherein each corresponding metal grid forms a complete shield field such that the contacts can be protected in the respective shield grids to operate independently.
According to an embodiment of the invention, the housing and the grid are rectangular, which aims to better connect the upper and lower electrical connectors, saving space, especially in a high space utilization environment such as a high speed train.
In summary, the rectangular differential circuit electric connector provided by the invention meets the structure and the requirements of a differential circuit, the structure of the electric connector can be used for safely and reliably connecting and transmitting corresponding control current signals and communication network signals, the connection of multiple paths of differential circuits can be realized through the additional arrangement device, the detachable contact piece is used, the disassembly and the installation are convenient, the shielding layer of the cable and the cable are externally laminated at the fixed position of the all-metal shell, so that a complete shielding field is formed in the shell pair, the invasion of an external interference source is avoided, and meanwhile, the overflow of the signals in the shielding field to the outside is also inhibited.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by those of ordinary skill in the art within the scope of the invention, as well as variations in the detailed description and application of the invention, as would be apparent to those of ordinary skill in the art in light of the teachings of this application.
Claims (8)
1. A rectangular differential circuit electrical connector for high speed motor vehicles, comprising:
the plug comprises a plug shell, a first grid, a second grid, a first cable and a shielding layer fixing part, wherein the first grid and the second grid are arranged in the plug shell;
the socket comprises a socket shell, a third grid, a fourth grid, a second cable and a shielding layer fixing part, wherein the third grid and the fourth grid are arranged in the socket shell and correspond to the first grid and the second grid respectively; and
the contact pieces are connected with the cable and are respectively arranged in the grids;
the upper part and the lower part of the shell are provided with connecting and fixing parts for fixing the upper electric connector and the lower electric connector; the first cable, the second cable and the shielding layer are provided with plastic part hole sites, after the differential two-core cable is in pressure connection with the contact part, the cable is arranged in the plastic part hole sites, and the shielding layer and the cable outer layer of the cable are in pressure connection with the shell.
2. The electrical connector of claim 1, wherein the contacts comprise removable pins and removable sockets, wherein the contacts disposed in the first and second grids are removable pins or sockets, and the contacts disposed in the third and fourth grids are sockets or pins.
3. The electrical connector of claim 1, wherein the first grid and the second grid are longitudinally arranged in plurality for satisfying a requirement of a multi-path differential circuit.
4. The electrical connector of claim 3, wherein the third and fourth grids are longitudinally aligned in line with the first and second grids.
5. The electrical connector of claim 1, wherein the plug housing and the receptacle housing are aluminum members, and wherein the housing surfaces are provided with a conductive metal plating.
6. The electrical connector of claim 1, wherein the first, second, third and fourth grids are the same material as the housing.
7. The electrical connector of claim 1, wherein the plug housing and the receptacle housing are sealed with a seal after connection such that the housing forms a complete shield field to the interior thereof.
8. The electrical connector of claim 1, wherein the housing and the grid are rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486847.5A CN108199168B (en) | 2017-12-30 | 2017-12-30 | Rectangular differential circuit electric connector for high-speed motor car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711486847.5A CN108199168B (en) | 2017-12-30 | 2017-12-30 | Rectangular differential circuit electric connector for high-speed motor car |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108199168A CN108199168A (en) | 2018-06-22 |
| CN108199168B true CN108199168B (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711486847.5A Active CN108199168B (en) | 2017-12-30 | 2017-12-30 | Rectangular differential circuit electric connector for high-speed motor car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108199168B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149281A (en) * | 2018-10-10 | 2019-01-04 | 深圳市朗英科技开发有限公司 | A kind of connector and photographic device |
| CN111082268A (en) * | 2019-12-31 | 2020-04-28 | 深圳市中车业成实业有限公司 | Integrated connecting device and connecting method for high-speed bullet train Ethernet connector and control signal electric connector |
| CN112563841B (en) * | 2020-11-11 | 2022-06-28 | 中国航天时代电子有限公司 | 6.25Gbps coaxial structure differential data cable assembly for aerospace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0308092A2 (en) * | 1987-08-24 | 1989-03-22 | G & H Technology, Inc. | Cable shield termination for an electrical connector |
| US5190479A (en) * | 1991-09-30 | 1993-03-02 | Honeywell Inc. | Electrical connector incorporating EMI/RFI/EMP isolation |
| TW514311U (en) * | 2000-08-23 | 2002-12-11 | Fci Sa | Stacked electrical connector for use with a filter insert |
| CN202564729U (en) * | 2012-01-11 | 2012-11-28 | 张辉 | Double-layer screened coaxial cable with anti-separation design |
| CN106532381A (en) * | 2016-12-30 | 2017-03-22 | 珠海市业成轨道交通设备科技有限公司 | Circular connector system for control and network centralization for high-speed motor vehicle |
| CN206322951U (en) * | 2016-12-30 | 2017-07-11 | 江门市业成轨道设备有限公司 | The electric connector system that a kind of magnetic suspension train is electromagnetically shielded entirely |
| CN107069339A (en) * | 2016-12-30 | 2017-08-18 | 江门市业成轨道设备有限公司 | The electric connector system that a kind of magnetic suspension train is electromagnetically shielded entirely |
| CN207868434U (en) * | 2017-12-30 | 2018-09-14 | 珠海市业成轨道交通设备科技有限公司 | A kind of high speed motor car rectangle difference channel electric connector |
-
2017
- 2017-12-30 CN CN201711486847.5A patent/CN108199168B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0308092A2 (en) * | 1987-08-24 | 1989-03-22 | G & H Technology, Inc. | Cable shield termination for an electrical connector |
| US5190479A (en) * | 1991-09-30 | 1993-03-02 | Honeywell Inc. | Electrical connector incorporating EMI/RFI/EMP isolation |
| TW514311U (en) * | 2000-08-23 | 2002-12-11 | Fci Sa | Stacked electrical connector for use with a filter insert |
| CN202564729U (en) * | 2012-01-11 | 2012-11-28 | 张辉 | Double-layer screened coaxial cable with anti-separation design |
| CN106532381A (en) * | 2016-12-30 | 2017-03-22 | 珠海市业成轨道交通设备科技有限公司 | Circular connector system for control and network centralization for high-speed motor vehicle |
| CN206322951U (en) * | 2016-12-30 | 2017-07-11 | 江门市业成轨道设备有限公司 | The electric connector system that a kind of magnetic suspension train is electromagnetically shielded entirely |
| CN107069339A (en) * | 2016-12-30 | 2017-08-18 | 江门市业成轨道设备有限公司 | The electric connector system that a kind of magnetic suspension train is electromagnetically shielded entirely |
| CN207868434U (en) * | 2017-12-30 | 2018-09-14 | 珠海市业成轨道交通设备科技有限公司 | A kind of high speed motor car rectangle difference channel electric connector |
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| Publication number | Publication date |
|---|---|
| CN108199168A (en) | 2018-06-22 |
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