CN107978922A - A kind of data server device of improvement - Google Patents

A kind of data server device of improvement Download PDF

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Publication number
CN107978922A
CN107978922A CN201711232836.4A CN201711232836A CN107978922A CN 107978922 A CN107978922 A CN 107978922A CN 201711232836 A CN201711232836 A CN 201711232836A CN 107978922 A CN107978922 A CN 107978922A
Authority
CN
China
Prior art keywords
groove
plug
derivation
block
sliding groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201711232836.4A
Other languages
Chinese (zh)
Inventor
潘王琴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Environmental Protection Technology Co Ltd
Original Assignee
Shenzhen Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Environmental Protection Technology Co Ltd filed Critical Shenzhen Environmental Protection Technology Co Ltd
Priority to CN201711232836.4A priority Critical patent/CN107978922A/en
Publication of CN107978922A publication Critical patent/CN107978922A/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44Means for preventing access to live contacts
    • H01R13/447Shutter or cover plate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/70Structural association with built-in electrical component with built-in switch
    • H01R13/713Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00Connectors or connections adapted for particular applications
    • H01R2201/06Connectors or connections adapted for particular applications for computer periphery

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  • Connector Housings Or Holding Contact Members (AREA)

Abstract

The invention discloses a kind of data server device of improvement, including socket and the plug to be connected with the socket, the inserting groove to stretch upwards is provided with the socket bottom surface, unicom is provided with the first sliding groove in the inserting groove right wall, the first trolley shoe that can be moved up and down is provided with described first sliding groove, it is provided with first trolley shoe and slips groove with the second of the inserting groove unicom, plug interlocking safety and stability in the present invention, and plug energization safety and stability, whole device is easy to operate, add the stability of plug interlocking, considerably increase the plug efficiency of plug, it effectively prevent and electric shock accidents occurs when plugging plug.

Description

A kind of data server device of improvement
Technical field
The present invention relates to data server device field, more particularly to a kind of data server device of improvement.
Background technology
Big data provides positive information for enterprise management decision-making, and computer and database management system software are common Database server is constituted, database server provides service for Client application, therefore to carry out data maintenance, existing clothes Business device is all to be connected to power end by electric wire, due to easily being loosened between plug and socket, occurs data processing to one Partly power off and cause algorithm to routed phenomenon, plug extraction when causing huge loss, and repairing, socket aperture is exposed, exists Electric leakage risk.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of data server device of improvement, it can solve above-mentioned existing In the art the problem of.
To solve the above problems, the present invention adopts the following technical scheme that:
A kind of data server device of improvement of the present invention, including socket and slotting to be connected with the socket Head, the inserting groove to stretch upwards is provided with the socket bottom surface, and unicom is provided with the first sliding groove in the inserting groove right wall, The first trolley shoe that can be moved up and down is provided with described first sliding groove, is provided with first trolley shoe and the grafting Second sliding groove of groove unicom, be provided with the described second sliding groove can side-to-side movement the second trolley shoe, described second is sliding The second screw hole of left and right perforation is provided with block, is fixedly installed derivation at the top of the second trolley shoe left side, described second Trolley shoe left side bottom is fixedly installed locking block, and the groove position of up/down perforation is provided among the derivation, and described second slides The second screw rod being connected with the second screw hole helical line is additionally provided with access slot, the second screw rod right end is with being arranged on Described second slips the second driving machine power connector in groove right wall, and up/down perforation setting is additionally provided with first trolley shoe The first screw hole, be additionally provided with the first screw rod being connected with the first screw hole helical line, institute in the described first sliding groove The the first driving machine power connector stated the first screw tip and be arranged in the described first sliding groove top wall, the inserting groove left wall Middle unicom is provided with derivation groove, it is described derive be provided with groove can side-to-side movement derivation board, be additionally provided with the derivation groove It is fixedly connected with the derivation board left end and the derivation spring element the derivation board to be pushed up to the right, the derivation board right side On be provided with friction-proof piece, be provided among the inserting groove roof and power on block, be provided among the plug top surface to institute State the grafting block of inserting groove mating connection, be provided among the grafting block top surface to the electricity for powering on block mating connection Road link slot, at the grafting block tip position or so perforation be provided with the locked groove for the locking block interlocking, it is described Lower left quarter is embedded with earth leakage protective device and places chamber inside socket, and the earth leakage protective device, which is placed, to be provided with chamber in internal electricity There is the earth leakage protective device automatically powered off during electric leakage accident in road, is fixedly installed in the earth leakage protective device left end face switchable Door part, the plug bottom is provided with the electric wire for being connected to data server, and the plug outer ring surface last week is equipped with anti-skidding rub Wipe set.
As preferable technical solution, the first screw rod bottom coordinates with the described first sliding groove bottom wall switching, described Second sliding groove and the front and rear setting of first screw hole point.
As preferable technical solution, the inserting groove bottom is provided with the first bevel mouth, and the locked groove left end is set There is the second bevel mouth, the block bottom surface that powers on is provided with oblique surface.
As preferable technical solution, the circuit link slot is connected with the plug circuit, described to power on block and alternating current Circuit connects.
The beneficial effects of the invention are as follows:
1. by the way that grafting block is inserted into inserting groove, when the top surface of grafting block is abutted with the bottom surface of derivation board, locked groove with Locking block is in relative status, and grafting block top surface is flushed with deriving bottom surface, and derivation board is in relative status with deriving, and first controls the Two the second screw rods of driving machine task driven rotate, the second screw rod rotate driving the second trolley shoe slide to the left, the second trolley shoe to Left slide drives derivation and locking block to slide to the left, and locking block is slideably inserted into locked groove so that grafting block interlocking to be inserted to the left Access slot, derivation is slided to the left then gradually to abut with derivation board, when the second trolley shoe is slidably disposed in the most left of the second sliding groove to the left During end position, control the second driving machine be stopped, at this time, locking block completely with locked groove be connected, locking block, derivation and The left side of grafting block flushes, and circuit link slot is in relative status with groove position, and circuit link slot is in opposite shape with powering on block State, then controls first the first screw rod of driving machine task driven to rotate, and the first screw rod rotates the first trolley shoe upward sliding of driving, First trolley shoe upward sliding drives grafting block also upward sliding, when the first trolley shoe slides up to the most top of the first sliding groove During end position, the first driving machine of control is stopped, and at this time, plug top surface is abutted with socket bottom surface, derives top surface and inserting groove Roof abuts, and powers on block through groove position and is inserted into circuit link slot the energization that is connected, and grafting block is in place by complete interlocking, Plug was both also at "on" position in interlocking state, so as to add the insertion efficiency of plug so that the interlocking safety of plug Stablize, energization safety and stability.
2. by first holding plug, the work reversion of the first driving machine is then first controlled so that the first trolley shoe slide downward To the bottom most position of the first sliding groove, so that plug powers off, then the work reversion of the second driving machine is controlled so that second slides Block is connect positioned at the low order end position of the second sliding groove, so that plug unlocks, grafting block is finally extracted from inserting groove Realize the extraction of plug, so as to add the extraction efficiency of plug, the extraction after being damaged easy to plug is replaced.
3. plug interlocking safety and stability in the present invention, and plug energization safety and stability, by first being carried out to plug during insertion Be powered again to plug after interlocking, when extraction first plug is powered off after plug is unlocked again, whole device operation It is convenient and efficient, the stability of plug interlocking is added, considerably increases the plug efficiency of plug, effectively prevent in plug plug Shi Fasheng electric shock accidents.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the inside overall structure diagram for the data server device that the present invention improves;
Fig. 2 is in structure diagram when interlocking and "on" position for plug in the present invention;
Fig. 3 is sectional view at A-A in figure.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to shown in Fig. 1-3, a kind of data server device of improvement of the invention, including socket 2 and to institute The plug 1 of the mating connection of socket 2 is stated, the inserting groove 20 to stretch upwards is provided with 2 bottom surface of socket, the inserting groove 20 is right Unicom is provided with the first sliding groove 5 in wall, and the first trolley shoe 50 that can be moved up and down, institute are provided with the described first sliding groove 5 State to be provided with the first trolley shoe 50 and slip groove 3 with the second of 20 unicom of inserting groove, be provided with the described second sliding groove 3 Can side-to-side movement the second trolley shoe 32, be provided with the second screw hole 321 of left and right perforation in second trolley shoe 32, described the Derivation 34 is fixedly installed at the top of two trolley shoes, 32 left side, the 32 left side bottom of the second trolley shoe is fixedly installed interlocking Block 33, it is described to derive the groove position 35 that up/down perforation is provided among 34, it is additionally provided with and described second in the described second sliding groove 3 The second screw rod 31 that 321 helical line of screw hole is connected, 31 right end of the second screw rod are right with being arranged on the described second sliding groove 3 30 power connector of the second driving machine in wall, the first screw hole of up/down perforation setting is additionally provided with first trolley shoe 50, The first screw rod 52 being connected with the first screw hole helical line, first spiral shell are additionally provided with described first sliding groove 5 52 top of bar and 51 power connector of the first driving machine being arranged in the described first 5 roof of sliding groove, 20 left wall of inserting groove Middle unicom be provided with derive groove 4, it is described derive groove 4 in be provided with can side-to-side movement derivation board 40, it is described derivation groove 4 in also set It is equipped with and is fixedly connected with 40 left end of derivation board and the derivation spring element 42 derivation board 40 to be pushed up to the right, it is described to push away Guide plate is provided with friction-proof piece 41 on 40 right side, can prevent 40 right side of derivation board from producing mill by the friction-proof piece 41 Damage, is provided among 20 roof of inserting groove and powers on block 22, be provided among 1 top surface of plug to the inserting groove The 20 grafting blocks 10 being connected, be provided among 10 top surface of grafting block to the electricity for powering on the mating connection of block 22 Road link slot 13, at 10 tip position of grafting block or so perforation be provided with the lock for the locking block 33 insertion interlocking Access slot 11, the 2 inside lower left quarter of socket are embedded with earth leakage protective device and place chamber 201, and the earth leakage protective device is placed in chamber 201 The earth leakage protective device 202 for being automatically powered off when electric leakage accident occurs in internal circuit is provided with, the earth leakage protective device 202 is left Switchable door part 203 is fixedly installed on side end face, 1 bottom of plug is provided with the electric wire for being connected to data server 102,1 outer ring surface of plug was equipped with anti-skidding friction sleeve 101 last week.
Wherein, 52 bottom of the first screw rod coordinates with the described first sliding groove 5 bottom wall switching, the described second sliding groove 3 With the front and rear setting of first screw hole point.
Wherein, 20 bottom of inserting groove is provided with the first bevel mouth 21, by described in first bevel mouth 21 convenience Grafting block 10 is rapidly inserted into the inserting groove 20 and is connected, and 11 left end of locked groove is provided with the second bevel mouth 12, By second bevel mouth 12 facilitate the locking block 33 be rapidly inserted into the locked groove 11 be connected with incite somebody to action described in 10 interlocking of grafting block, 22 bottom surface of block that powers on are provided with oblique surface 23, by powering on block 22 described in the oblique surface 23 convenience It is rapidly inserted into be connected in the circuit link slot 13 and is powered.
Wherein, the circuit link slot 13 is connected with 1 circuit of plug, and the block 22 that powers on is connected with mains circuit, So that power on safety and stability.
In initial position, 51 and second driving machine 30 of the first driving machine is in stop working state, described Second trolley shoe 32 is sliding positioned at described first positioned at the low order end position of the described second sliding groove 3, first trolley shoe 50 The bottom most position of groove 5, the derivation 34 and locking block 33 are in the described second sliding groove 3, and the derivation board 40 is in institute State and stretched under the resilient force for deriving spring element 42 in the inserting groove 20, and the derivation board 40 is powered on positioned at described The lower section of block 22.
When needing to be inserted into plug 1, first the grafting block 10 is aligned with the inserting groove 20, is then pushed up described Plug 1 so that the grafting block 10 is inserted into the inserting groove 20, when top surface and the derivation board 40 of the grafting block 10 Bottom surface when abutting, the locked groove 11 and the locking block 33 are in relative status, and 10 top surface of grafting block is pushed away with described Lead 34 bottom surfaces to flush, the derivation board 40 is in relative status with the derivation 34, first controls second driving machine 30 to work Second screw rod 31 is driven to rotate, second screw rod 31, which rotates, drives second trolley shoe 32 to slide to the left, and described the Two trolley shoes 32 slide the driving derivation 34 to the left and locking block 3 slides to the left, and the locking block 3 is slideably inserted into institute to the left State in locked groove 11 with by 10 interlocking of grafting block in the inserting groove 20, it is described derive 34 slide to the left then gradually with it is described Derivation board 40 abuts, when second trolley shoe 32 is slidably disposed in the high order end position of the described second sliding groove 3 to the left, control Second driving machine 30 is stopped, and at this time, the locking block 33 is connected with the locked groove 11 completely, the interlocking The left side of block 33, derivation 34 and the grafting block 10 flushes, and the circuit link slot 13 is in opposite shape with the groove position 35 State, the circuit link slot 13 are in relative status with the block 22 that powers on, and then control the work of the first driving machine 51 to drive First screw rod 52 is moved to rotate, first screw rod 52, which rotates, drives 50 upward sliding of the first trolley shoe, and described first 50 upward sliding of trolley shoe drives the grafting block 10 also upward sliding, when first trolley shoe 50 slides up to described the During the topmost position of one sliding groove 5, control first driving machine 51 to be stopped, at this time, 1 top surface of plug with it is described 2 bottom surface of socket abuts, and 34 top surfaces of the derivation are abutted with 20 roof of inserting groove, and the block 22 that powers on passes through the groove position 35 And be inserted into be connected in the circuit link slot 13 and be powered, the grafting block 10 is in place by complete interlocking, and the plug 1 was both "on" position is also in interlocking state.
When needing to extract plug 1, the plug 1 is first held, then first controls 51 work of the first driving machine Invert so that first trolley shoe 50 slides down to the bottom most position of the described first sliding groove 5, so that described Plug 1 powers off, then controls the work of the second driving machine 30 reversion so that second trolley shoe 32 is sliding positioned at described second The low order end position of groove 3, so that the plug 1 unlocks, finally extracts the grafting block 10 i.e. from the inserting groove 20 The extraction of plug 1 can be achieved.
The beneficial effects of the invention are as follows:
1. by the way that grafting block is inserted into inserting groove, when the top surface of grafting block is abutted with the bottom surface of derivation board, locked groove with Locking block is in relative status, and grafting block top surface is flushed with deriving bottom surface, and derivation board is in relative status with deriving, and first controls the Two the second screw rods of driving machine task driven rotate, the second screw rod rotate driving the second trolley shoe slide to the left, the second trolley shoe to Left slide drives derivation and locking block to slide to the left, and locking block is slideably inserted into locked groove so that grafting block interlocking to be inserted to the left Access slot, derivation is slided to the left then gradually to abut with derivation board, when the second trolley shoe is slidably disposed in the most left of the second sliding groove to the left During end position, control the second driving machine be stopped, at this time, locking block completely with locked groove be connected, locking block, derivation and The left side of grafting block flushes, and circuit link slot is in relative status with groove position, and circuit link slot is in opposite shape with powering on block State, then controls first the first screw rod of driving machine task driven to rotate, and the first screw rod rotates the first trolley shoe upward sliding of driving, First trolley shoe upward sliding drives grafting block also upward sliding, when the first trolley shoe slides up to the most top of the first sliding groove During end position, the first driving machine of control is stopped, and at this time, plug top surface is abutted with socket bottom surface, derives top surface and inserting groove Roof abuts, and powers on block through groove position and is inserted into circuit link slot the energization that is connected, and grafting block is in place by complete interlocking, Plug was both also at "on" position in interlocking state, so as to add the insertion efficiency of plug so that the interlocking safety of plug Stablize, energization safety and stability.
2. by first holding plug, the work reversion of the first driving machine is then first controlled so that the first trolley shoe slide downward To the bottom most position of the first sliding groove, so that plug powers off, then the work reversion of the second driving machine is controlled so that second slides Block is connect positioned at the low order end position of the second sliding groove, so that plug unlocks, grafting block is finally extracted from inserting groove Realize the extraction of plug, so as to add the extraction efficiency of plug, the extraction after being damaged easy to plug is replaced.
3. plug interlocking safety and stability in the present invention, and plug energization safety and stability, by first being carried out to plug during insertion Be powered again to plug after interlocking, when extraction first plug is powered off after plug is unlocked again, whole device operation It is convenient and efficient, the stability of plug interlocking is added, considerably increases the plug efficiency of plug, effectively prevent in plug plug Shi Fasheng electric shock accidents.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent defines.

Claims (4)

1. a kind of data server device of improvement, including socket and the plug to be connected with the socket, it is special Sign is:The inserting groove to stretch upwards is provided with the socket bottom surface, unicom is provided with the first cunning in the inserting groove right wall Access slot, is provided with the first trolley shoe that can be moved up and down in the described first sliding groove, is provided with first trolley shoe and institute State the second sliding groove of inserting groove unicom, be provided with the described second sliding groove can side-to-side movement the second trolley shoe, described the The second screw hole of left and right perforation is provided with two trolley shoes, derivation, institute are fixedly installed at the top of the second trolley shoe left side State the second trolley shoe left side bottom and be fixedly installed locking block, the groove position of up/down perforation is provided among the derivation, it is described Be additionally provided with the second screw rod being connected with the second screw hole helical line in second sliding groove, the second screw rod right end with The second driving machine power connector being arranged in the described second sliding groove right wall, is additionally provided with first trolley shoe and passes through up and down Logical the first screw hole set, described first slips the first spiral shell for being additionally provided with groove and being connected with the first screw hole helical line Bar, first screw tip and the first driving machine power connector being arranged in the described first sliding groove top wall, the grafting Unicom is provided with derivation groove in groove left wall, it is described derive be provided with groove can side-to-side movement derivation board, in the derivation groove also It is provided with and is fixedly connected with the derivation board left end and the derivation spring element the derivation board to be pushed up to the right, the derivation board Friction-proof piece is provided with right side, is provided among the inserting groove roof and powers on block, use is provided among the plug top surface With the grafting block being connected with the inserting groove, it is provided among the grafting block top surface to coordinate company with the block that powers on The circuit link slot connect, at the grafting block tip position or so perforation be provided with the interlocking for the locking block interlocking Groove, socket inside lower left quarter are embedded with earth leakage protective device and place chamber, and the earth leakage protective device, which is placed to be provided with chamber, to be used for The earth leakage protective device automatically powered off when electric leakage accident occurs in internal circuit, is fixedly installed in the earth leakage protective device left end face There is switchable door part, the plug bottom is provided with the electric wire for being connected to data server, and the plug outer ring surface was set last week There is anti-skidding friction sleeve.
2. the data server device of improvement according to claim 1, it is characterised in that:The first screw rod bottom and institute State the first sliding groove bottom wall switching cooperation, the described second sliding groove and the front and rear setting of first screw hole point.
3. the data server device of improvement according to claim 1, it is characterised in that:The inserting groove bottom is provided with First bevel mouth, the locked groove left end are provided with the second bevel mouth, and the block bottom surface that powers on is provided with oblique surface.
4. the data server device of improvement according to claim 1, it is characterised in that:The circuit link slot with it is described Plug circuit connects, and the block that powers on is connected with mains circuit.
CN201711232836.4A 2017-11-30 2017-11-30 A kind of data server device of improvement Withdrawn CN107978922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711232836.4A CN107978922A (en) 2017-11-30 2017-11-30 A kind of data server device of improvement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711232836.4A CN107978922A (en) 2017-11-30 2017-11-30 A kind of data server device of improvement

Publications (1)

Publication Number Publication Date
CN107978922A true CN107978922A (en) 2018-05-01

Family

ID=62008394

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711232836.4A Withdrawn CN107978922A (en) 2017-11-30 2017-11-30 A kind of data server device of improvement

Country Status (1)

Country Link
CN (1) CN107978922A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107017521A (en) * 2016-11-21 2017-08-04 义乌市晶凯机械设备有限公司 A kind of safe power equipment is powered plug-in connection
CN107364342A (en) * 2017-03-27 2017-11-21 深圳市海盾五金工具有限公司 A kind of safe charging pile
CN107394501A (en) * 2017-07-26 2017-11-24 徐丽玲 A kind of bridge equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107017521A (en) * 2016-11-21 2017-08-04 义乌市晶凯机械设备有限公司 A kind of safe power equipment is powered plug-in connection
CN107364342A (en) * 2017-03-27 2017-11-21 深圳市海盾五金工具有限公司 A kind of safe charging pile
CN107394501A (en) * 2017-07-26 2017-11-24 徐丽玲 A kind of bridge equipment

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