CN208674873U - Power grid feeding mechanism and class's board system - Google Patents

Power grid feeding mechanism and class's board system Download PDF

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Publication number
CN208674873U
CN208674873U CN201821554374.8U CN201821554374U CN208674873U CN 208674873 U CN208674873 U CN 208674873U CN 201821554374 U CN201821554374 U CN 201821554374U CN 208674873 U CN208674873 U CN 208674873U
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CN
China
Prior art keywords
power grid
power
line
board
class
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Expired - Fee Related
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CN201821554374.8U
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Chinese (zh)
Inventor
熊志国
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Hainan Nine Spring Education Polytron Technologies Inc
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Hainan Nine Spring Education Polytron Technologies Inc
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Priority to CN201821554374.8U priority Critical patent/CN208674873U/en
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Publication of CN208674873U publication Critical patent/CN208674873U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to electric power and network provisioning technical field, more particularly to power grid feeding mechanism and class's board system, wherein, power grid feeding mechanism includes the network switch and power module, the network switch is connect with core network, power module is electrically connected with city, and one end and the network switch, the power module of every power grid one line are all connected with, the corresponding electronics class board connection of the other end;The network switch is used to provide network provisioning at least one electronics class board by least one power grid one line;Power module is used to provide power supply at least one electronics class board by least one power grid one line.Power grid feeding mechanism provided by the utility model and the problem that the multiple electronics class board installation wiring processes of class's board system enhancement are extremely complex, installation is inconvenient.

Description

Power grid feeding mechanism and class's board system
Technical field
The utility model relates to electric power and network provisioning technical field, in particular to a kind of power grid feeding mechanism and Class's board system.
Background technique
Electronics class board is a kind of this smart-interactive terminal, is mounted in the high definition visualization on each classroom doorway of school and has The smart machine of interaction function, to show the attendance information of each class, information of giving lessons, Classic Course, moral education publicity, class Honor, Campus TV Station, examination hall information, campus notice, class's elegance, are the external presentation windows of Intelligent campus and wisdom classroom The important carrier that mouth and campus culture and propaganda action and various information are shown.
Electronics class board is mounted on each classroom doorway and needs to provide electric power and network provisioning to it, general in the prior art to use Respectively each electronics class board is equipped with an electric wire and a cable to provide power supply and network provisioning, when needing to install When the electronics class board of big quantity, installation wiring process is extremely complex, installation is inconvenient.
Utility model content
In view of this, the utility model embodiment is designed to provide a kind of power grid feeding mechanism and class's board system, with Improve the problem that above-mentioned multiple electronics class board installation wiring processes are extremely complex, installation is inconvenient.
The utility model embodiment provides a kind of power grid feeding mechanism, for being given by least one power grid one line At least one electronics class board provides network and power supply, and the power grid feeding mechanism includes the network switch and power module, The network switch is connect with core network, and the power module is electrically connected with city, one end of the every power grid one line It is all connected with the network switch, power module, the corresponding electronics class board connection of the other end;The network exchange Machine is used to provide network provisioning at least one described electronics class board by at least one power grid one line;The electric power mould Block is used to provide power supply at least one described electronics class board by at least one power grid one line.
Further, the power module includes Switching Power Supply and power supply deconcentrator, and the Switching Power Supply is electrically connected to institute It states between alternating current and the power supply deconcentrator, and the Switching Power Supply passes through the power supply deconcentrator and at least one power grid Integrated line connection;The Switching Power Supply passes through the power supply deconcentrator to institute after being used to be converted to the alternating current low-voltage DC It states at least one electronics class board and power supply is provided.
Further, the power grid feeding mechanism further includes air switch, and the air switch is electrically connected to the alternating current Between the power module.
Further, described device further includes weak current box, and the network switch and the power module are all set in institute It states in weak current box.
A kind of class of board system, including above-mentioned power grid feeding mechanism, the power grid feeding mechanism include the network switch and Power module, the network switch are connect with core network, and the power module is electrically connected with city, the every power grid one One end of line is all connected with the network switch, power module, the corresponding electronics class board connection of the other end;It is described The network switch is used to provide network provisioning at least one described electronics class board by at least one power grid one line;Institute Power module is stated for providing power supply at least one described electronics class board by at least one power grid one line.Institute The class's of stating board system further includes at least one power grid one line and at least one electronics class board, one end of the every power grid one line It is electrically connected with the power grid feeding mechanism, the other end is electrically connected with an electronics class board.
Further, each electronics class board includes DC voltage-stabilizing module and display screen, each DC voltage-stabilizing mould Block is electrically connected by a power grid one line with the power module, and each DC voltage-stabilizing module and display screen electricity Connection;Each DC voltage-stabilizing module is used to be transmitted to after carrying out pressure stabilizing and decompression to the electric energy that the power module is supplied The display screen.
Further, each electronics class board includes Ethernet interface and display screen, and each Ethernet interface connects It is connected between the network switch and the display screen.
Further, the power grid one line includes at least one for monitoring line and cable.
Further, the power grid feeding mechanism further includes connection component, one end of the connection component and the network Interchanger, power module are all connected with, and the other end is detachably connected at least one power grid one line.
Further, the connection component includes above offering multiple connecting holes, one end of the every power grid one line Equipped with protrusion, a protrusion and a connecting hole cooperation are to realize the connection component and a power grid one Line is detachably connected.
Compared with the prior art, the utility model has the following beneficial effects:
A kind of power grid feeding mechanism and class's board system, the network switch provided by the utility model are given by power grid one line Electronics class board provides network provisioning, and power module provides power supply by power grid one line electron class's board.Pass through an electricity Netting integrated line can be realized to an electronics class board while providing network and power supply, so as to improve multiple electronics classes board peace Fill the problem that cabling processes are extremely complex, installation is inconvenient.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 shows the block diagram of class's board system provided by the utility model embodiment.
Fig. 2 shows the structural schematic diagrams of class's board system provided by the utility model embodiment.
Fig. 3 shows the block diagram of power grid feeding mechanism provided by the utility model embodiment.
Fig. 4 shows the structural schematic diagram of connection component provided by the utility model embodiment.
Icon: 10- classes of board systems;100- power grid feeding mechanism;The 110- network switch;120- power module;121- is opened Powered-down source;122- power supply deconcentrator;130- air switch;140- connection component;The first terminals of 141-;The second wiring of 142- End;150- weak current box;200- power grid one line;210- protrusion;300- electronics class board;310- DC voltage-stabilizing module;320- ether Network interface;330- display screen.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations Arrangement and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below The range of claimed invention, but it is merely representative of the selected embodiment of the utility model.Based on the utility model Embodiment, those skilled in the art's every other embodiment obtained without making creative work, all Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " on ", "lower", "left", "right", "inner", "outside" etc. The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the utility model product use when The orientation or positional relationship usually put, is merely for convenience of describing the present invention and simplifying the description, rather than instruction or dark Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair The limitation of the utility model.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.
It is in the description of the present invention, it should also be noted that, herein, such as first and second or the like pass It is that term is only used to distinguish one entity or operation from another entity or operation, and not necessarily requires or secretly Show that there are any actual relationship or orders between these entities or operation.Term "horizontal", "vertical", " pendency " etc. Term is not offered as requiring component abswolute level or pendency, but can be slightly tilted.As "horizontal" only refers to its direction phase It is more horizontal for "vertical", it is not to indicate that the structure is had to fully horizontally, but can be slightly tilted.Term " packet Include ", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion so that including the mistake of a series of elements Journey, method, article or equipment not only include those elements, but also including other elements that are not explicitly listed, either It further include for elements inherent to such a process, method, article, or device.In the absence of more restrictions, by sentence The element that "including a ..." limits, it is not excluded that also deposit in the process, method, article or apparatus that includes the element In other identical element.For the ordinary skill in the art, above-mentioned term can be understood in this reality with concrete condition With the concrete meaning in novel.
With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under The feature in embodiment and embodiment stated can be combined with each other.
First embodiment
Referring to Fig. 1, present embodiments provide a kind of class of board system 10, class's board system 10 include power grid feeding mechanism 100, At least one power grid one line 200 and at least one electronics class board 300, power grid feeding mechanism 100 pass through at least one power grid one Body line 200 and at least one electronics class board 300 connect.One end of every power grid one line 200 and power grid feeding mechanism 100 connect It connects, the other end is connect with an electronics class board 300, and power grid feeding mechanism 100 and electronics class board may be implemented in power grid one line 200 Electrical connection and communication connection between 300.Total radical of power grid one line 200 can be equal with the number of electronics class board 300.Example Such as, when total radical of power grid one line 200 is 5, then the number of corresponding electronics class board 300 is exactly 5, if need to increase electricity The number of sub- class's board 300, then correspondingly, being also required to increase the correspondence radical of power grid one line 200.
Referring to Fig. 2, power grid feeding mechanism 100 includes the network switch 110, power module 120, air switch 130, connects Connected components 140 and weak current box 150, the network switch 110 and connection component 140 communicate to connect, air switch 130, power module 120 and connection component 140 be sequentially connected electrically, the network switch 110, power module 120, air switch 130 and connection component 140 It is all set in weak current box 150.The network switch 110 and core network communicate to connect, and air switch 130 is electrically connected to alternating current, Connection component 140 is connect at least one power grid one line 200.
In the utility model embodiment, the network switch 110 and core network are communicated to connect, and pass through connection component 140 connect at least one power grid one line 200, for being given extremely by connection component 140 and at least one power grid one line 200 A few electronics class board 300 provides power supply.The network switch 110 includes a first input end and multiple first outputs End, a first input end and core network communicate to connect, and multiple first output ends are all connected to connection component 140.Optionally, The total number of 110 first output end of the network switch can select 4- according to the quantity and network transmission situation of electronics class board 300 The industrial switch of 16 mouthful 100,000,000 or gigabit.The network switch 110 may be implemented core network all the way while to multiple electronics Class's board 300 provides network provisioning.
Referring to Fig. 3, power module 120 is electrically connected to alternating current by air switch 130, and by connection component 140 with At least one power grid one line 200 connects, for giving at least one by connection component 140 and at least one power grid one line 200 A electronics class board 300 provides power supply.Power module 120 includes Switching Power Supply 121 and power supply deconcentrator 122, air switch 130, Switching Power Supply 121, power supply deconcentrator 122 and connection component 140 are sequentially connected electrically.
In the utility model embodiment, Switching Power Supply 121 is electrically connected by air switch 130 with alternating current, and switchs electricity Source 121 passes sequentially through power supply deconcentrator 122, connection component 140 is connect at least one power grid one line 200, is used for alternating current It is converted to and provides electric power at least one electronics class board 300 by power supply deconcentrator 122 and connection component 140 after low-voltage DC Supply.Specifically, the input voltage of Switching Power Supply 121 can be alternating current, and output voltage can be 30V, lower than human-body safety electricity Press 50V.Switching Power Supply 121 passes sequentially through power supply deconcentrator 122, connection component 140 and at least one after being depressured alternating current Power grid one line 200 is transmitted at least one electronics class board 300 to provide power supply, warp at least one electronics class board 300 Voltage after crossing decompression is human safety voltage, is transmitted to electronics class board 300 with the power supply of electron class board 300 and not will cause peace Full hidden danger ensure that the safety of user, improve user experience.
In the utility model embodiment, power supply deconcentrator 122 is electrically connected with Switching Power Supply 121, and passes through connection component 140 connect at least one power grid one line 200, and power supply deconcentrator 122 is used for the low-voltage DC for transmitting Switching Power Supply 121 It is divided into the low-voltage DC of multidiameter delay and passes sequentially through connection component 140, at least one power grid one line 200 for multidiameter delay Low-voltage DC be transmitted to 200 corresponding electronics class board 300 of every power grid one line.Power supply deconcentrator 122 includes one the Two input terminals and multiple second output terminals, second input terminal are electrically connected with Switching Power Supply 121, and multiple second output terminals connect It is connected to connection component 140.Power supply deconcentrator 122 will be divided into multichannel low-voltage DC to multiple electronics classes by low-voltage DC all the way Board 300 provides power supply simultaneously.Optionally, the total number of the second output terminal of power supply deconcentrator 122 can be electronics class board The total number of 300 quantity or the first output end.
Air switch 130 is electrically connected between alternating current and power module 120, for protecting to circuit.When in circuit Electrical equipment, such as power module 120 or when breaking down with electronics class board 300, air switch 130 can disconnect automatically To protect electrical equipment, air switch 130 can also be disconnected manually to carry out the maintenance of electrical equipment.
In the utility model embodiment, one end of connection component 140 and the network switch 110 are communicated to connect, and with electricity The power supply deconcentrator 122 of power module 120 is electrically connected, and the other end is detachably connected at least one power grid one line 200.Connection group Part 140 is detachably connected for realizing the network switch 110, power module 120 at least one power grid one line 200.
Referring to Fig. 4, one end of connection component 140 includes multiple first terminals 141, each first terminals 141 are It opens up there are two through-hole, two through-holes are respectively used to the communication connection network switch 110 and are electrically connected the power supply of power module 120 Deconcentrator 122, two through-holes of the first terminals 141 are separately connected first output end and power supply for the network switch 110 A second output terminal of device under point.The other end of connection component 140 includes multiple one-to-one with the first terminals 141 the Two terminals 142, each second terminals 142 are connected to first terminals 141, and each second terminals 142 are used for A power grid one line 200 is connected, multiple second terminals 142 are for connecting more power grid one lines 200.Optionally, second Terminals 142 can be the connecting hole opened up on connection component 140, and one end of every power grid one line 200 is equipped with a protrusion 210, each raised 210 and the cooperation of connecting hole to realize that connection component 140 connects with the detachable of power grid one line 200 It connects, more power grid one lines 200 are equipped with protrusion 210, can be connected on connection component 140 by protrusion 210.
As an implementation, the second terminals 142 of connection component 140 can be stepped groove, power grid one line 200 The protrusion 210 being equipped with can be crystal connector, and stepped groove and crystal connector plug connection realize connection component 140 and power grid one Body line 200 is detachably connected.Connection component 140 is set up, can be by second terminals 142 by an electronics class board 300 are connected to the network switch 110 and power supply deconcentrator 122 simultaneously, and network and power supply is integrated by two-in-one a, power grid one Network and power supply can transmit by body line 200 simultaneously from second terminals 142.Include in connection component 140 Multiple first terminals 141 and multiple and one-to-one second terminals 142 of the first terminals 141, if electronics class need to be added Board 300, the second terminals 142 that one end insertion directly by power grid one line 200 with protrusion 210 is reserved, is able to achieve Fast-wiring.
In the utility model embodiment, the network switch 110, power module 120, air are integrated in weak current box 150 Switch 130 and connection component 140.Optionally, the second terminals 142 of connection component 140 can opening towards weak current box 150 Mouthful, to facilitate connection power grid one line 200 when adding electronics class board 300.
In the utility model embodiment, one end of all power grid one lines 200 and the connection of power grid feeding mechanism 100 Component 140 connects, and the other end is connect with electronics class board 300, and every power grid one line 200 is connect with an electronics class board 300, use Connection between realization power grid feeding mechanism 100 and electronics class board 300.Optionally, total radical of power grid one line 200 can be with It is the number for needing electronics class to be mounted board 300.One end of power grid one line 200 can be equipped with protrusion 210, and protrusion 210 is used for It is connected with the plug of the second terminals 142 of connection component 140 to realize the detachable of power grid one line 200 and connection component 140 Connection.Power grid one line 200 can be realized simultaneously communication connection and electricity between power grid feeding mechanism 100 and electronics class board 300 Connection.As an implementation, power grid one line 200 includes at least one of monitoring line and cable.More power grid one lines 200 can be all monitoring lines, can also can both monitor the combination of line and cable with all cables.Pass through an electricity Netting integrated line 200 can be realized to an electronics class board 300 while providing network and power supply, so as to improve multiple electronics The problem that class's 300 installation wiring process of board is extremely complex, installation is inconvenient.
In the utility model embodiment, each electronics class board 300 is connected to power grid confession by a power grid one line 200 Device 100 is answered, multiple electronics classes board 300 is connected to power grid feeding mechanism 100 by more power grid one lines 200.Electronics class board The basic conditions such as 300 school timetable, student on duty, the class Culture construction for showing each class.Each electronics class board 300 includes DC voltage-stabilizing module 310, Ethernet interface 320 and display screen 330, DC voltage-stabilizing module 310 and display screen 330 are electrically connected, with Too network interface 320 and display screen 330 communicate to connect, DC voltage-stabilizing module 310 and Ethernet interface 320 with power grid one line 200 connections.
In the utility model embodiment, each DC voltage-stabilizing module 310 is supplied by a power grid one line 200 and power grid The power module 120 of device 100 is answered to be electrically connected, and each DC voltage-stabilizing module 310 is electrically connected with display screen 330, each direct current The electric energy that Voltage stabilizing module 310 is used to supply power grid feeding mechanism 100 is transmitted to display screen 330 after carrying out pressure stabilizing and decompression.It can Selection of land, the input voltage range of DC voltage-stabilizing module 310 can be 13-48V, and output voltage is stable 12V DC voltage, will The DC voltage of 12V is transmitted to display screen 330 to provide power supply to display screen 330, and DC voltage-stabilizing module 310 also has Short-circuit protection and reversal connection protection function.
In the utility model embodiment, each Ethernet interface 320 is supplied by a power grid one line 200 and power grid The network switch 110 of device 100 communicates to connect, and each Ethernet interface 320 and display screen 330 communicate to connect.By with Too network interface 320 can be realized power grid feeding mechanism 100 and provide network provisioning to display screen 330.Specifically, Ethernet interface 320 can be RJ-45 interface.
In the utility model embodiment, each display screen 330 is electrically connected with DC voltage-stabilizing module 310, and and Ethernet Interface 320 communicates to connect, and display screen 330 provides power supply by DC voltage-stabilizing module 310, is mentioned by Ethernet interface 320 For network provisioning.Display screen 330 can be CRT (Cathode Ray Tube) display screen and LCD (Liquid Crystal Display) at least one of display screen.
The working principle of class's board system 10 provided by the embodiment of the utility model: power grid feeding mechanism 100 is handed over including network It changes planes 110, power module 120, air switch 130 and connection component 140, the network switch 110 core network will be divided into all the way Multi-channel network, air switch 130 is connected electrically between alternating current and power module 120, for protecting power equipment;Power module Multiple power supplies are converted and be divided into alternating current by 120, and connection component 140 is by the multi-channel network of the network switch 110 and electric power mould The multiple power supplies of block 120 merge, and by the corresponding power supply all the way of a road network therein and give an electricity by a power supply one line Sub- class's board 300 provides power supply and network provisioning.
In conclusion power grid feeding mechanism provided in this embodiment and class's board system are dropped alternating current by Switching Power Supply It is transmitted to electronics class board after pressure and provides power supply with electron class board, the voltage after decompression is human safety voltage, is passed The safety of user will not be ensure that, improve user's body with the power supply of electron class board to security risk is caused by transporting to electronics class board It tests;Air switch protects circuit, while also facilitating the maintenance of electrical equipment;It include multiple first connecing in connection component Line end and multiple and one-to-one second terminals of the first terminals, if electronics class board need to be added, directly by power grid one line The second reserved terminals of one end insertion with protrusion, are able to achieve fast-wiring.Power grid one line can be realized simultaneously It is non-to improve multiple electronics class board installation wiring processes for electrical connection and communication connection between power grid feeding mechanism and electronics class board Problem often complicated, installation is inconvenient.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of power grid feeding mechanism, which is characterized in that for giving at least one electronics by least one power grid one line Class's board provides network and power supply, the power grid feeding mechanism include the network switch and power module, the network exchange Machine is connect with core network, and the power module is electrically connected with city, and one end of the every power grid one line and the network are handed over It changes planes, power module is all connected with, the corresponding electronics class board connection of the other end;
The network switch is used to provide net at least one described electronics class board by at least one power grid one line Network supply;
The power module is used to provide electric power at least one described electronics class board by at least one power grid one line Supply.
2. power grid feeding mechanism as described in claim 1, which is characterized in that the power module includes Switching Power Supply and power supply Deconcentrator, the Switching Power Supply is electrically connected between the alternating current and the power supply deconcentrator, and the Switching Power Supply passes through institute Power supply deconcentrator is stated to connect at least one power grid one line;
The Switching Power Supply be used to be converted to the alternating current after low-voltage DC by the power supply deconcentrator to it is described at least One electronics class board provides power supply.
3. power grid feeding mechanism as described in claim 1, which is characterized in that the power grid feeding mechanism further includes that air is opened It closes, the air switch is electrically connected between the alternating current and the power module.
4. power grid feeding mechanism as described in claim 1, which is characterized in that described device further includes weak current box, the network Interchanger and the power module are all set in the weak current box.
5. a kind of class of board system, which is characterized in that including the described in any item power grid feeding mechanisms of claim 1-4, the class Board system further includes at least one power grid one line and at least one electronics class board, one end of every power grid one line and institute The electrical connection of power grid feeding mechanism is stated, the other end is electrically connected with an electronics class board.
6. as claimed in claim 5 class of board system, which is characterized in that each electronics class board include DC voltage-stabilizing module and Display screen, each DC voltage-stabilizing module are electrically connected by a power grid one line with the power module, and each The DC voltage-stabilizing module is electrically connected with display screen;
Each DC voltage-stabilizing module is used to be transmitted to after carrying out pressure stabilizing and decompression to the electric energy that the power module is supplied The display screen.
7. as claimed in claim 5 class of board system, which is characterized in that each electronics class board includes Ethernet interface and shows Display screen, each Ethernet interface are connected between the network switch and the display screen.
8. as claimed in claim 5 class of board system, which is characterized in that the power grid one line includes monitoring line and cable extremely Few one kind.
9. as claimed in claim 5 class of board system, which is characterized in that the power grid feeding mechanism further includes connection component, institute The one end and the network switch, power module for stating connection component are all connected with, the other end and at least one power grid one Line is detachably connected.
10. as claimed in claim 9 class of board system, which is characterized in that the connection component includes above offering multiple connections Hole, one end of the every power grid one line are equipped with protrusion, and a protrusion and a connecting hole cooperation are to realize State being detachably connected for connection component and power grid one line.
CN201821554374.8U 2018-09-21 2018-09-21 Power grid feeding mechanism and class's board system Expired - Fee Related CN208674873U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821554374.8U CN208674873U (en) 2018-09-21 2018-09-21 Power grid feeding mechanism and class's board system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821554374.8U CN208674873U (en) 2018-09-21 2018-09-21 Power grid feeding mechanism and class's board system

Publications (1)

Publication Number Publication Date
CN208674873U true CN208674873U (en) 2019-03-29

Family

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Application Number Title Priority Date Filing Date
CN201821554374.8U Expired - Fee Related CN208674873U (en) 2018-09-21 2018-09-21 Power grid feeding mechanism and class's board system

Country Status (1)

Country Link
CN (1) CN208674873U (en)

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Granted publication date: 20190329

Termination date: 20210921