CN108544400A - Pcb board repair fixing device - Google Patents

Pcb board repair fixing device Download PDF

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Publication number
CN108544400A
CN108544400A CN201810610068.XA CN201810610068A CN108544400A CN 108544400 A CN108544400 A CN 108544400A CN 201810610068 A CN201810610068 A CN 201810610068A CN 108544400 A CN108544400 A CN 108544400A
Authority
CN
China
Prior art keywords
pcb board
platen
movable plate
hinged
fixing device
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.)
Pending
Application number
CN201810610068.XA
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Chinese (zh)
Inventor
姚强
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.)
Chongqing He Ju Da Intelligent Equipment Co Ltd
Original Assignee
Chongqing He Ju Da Intelligent Equipment 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 Chongqing He Ju Da Intelligent Equipment Co Ltd filed Critical Chongqing He Ju Da Intelligent Equipment Co Ltd
Priority to CN201810610068.XA priority Critical patent/CN108544400A/en
Publication of CN108544400A publication Critical patent/CN108544400A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005Vacuum work holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Floor Finish (AREA)

Abstract

The present invention relates to the fixing device technical fields of pcb board, disclose pcb board repair fixing device, including platen, platen is equipped with fixing axle, fixing axle includes two parallel montants and the width adjustment mechanism between two montants, and width adjustment mechanism includes multigroup diamond shape frame being from top to bottom arranged in order;Every group of diamond shape frame includes head and the tail hinged four connecting rods successively, and diamond shape frame includes the joint angle of the slide angle and two faces of two faces, two slides angle are slidably connected at respectively on two montants, adjacent two joint angles are hinged between neighboring diamonds frame, the joint angle of the top is hinged on montant, the joint angle of bottom is hinged with strut, and strut is connected with pulling mechanism.The pcb board of the location hole with different size aperture can be fixed on the positioning through the invention, be convenient for the repair of pcb board.

Description

Pcb board repair fixing device
Technical field
The present invention relates to the fixing device technical fields of pcb board, and in particular to pcb board repair fixing device.
Background technology
Pcb board, i.e. printed circuit board are to be cut into certain size using insulation board as base material, and at least attached thereon there are one conductive Figure, and the porose plate body of cloth, are used for replacing the chassis of previous device electronic component, and realize the phase between electronic component It connects.Since this plate is made of electron printing, therefore it is referred to as " printing " circuit board.
During overhauling pcb board, need that pcb board is fixed.The fixing device of existing pcb board is logical It is often that the location hole being inserted on pcb board using inserted link fixes plate body.But when repairing, it is often necessary to different big Small pcb board is handled, and the pore size of the location hole on the plate body of different size specification pcb boards is different, thus Inserted link is difficult to adapt to the pcb board of multiple aperture size, and thereby resulting in device can not be effectively fixed to the progress of the location hole of different pore size Position, influences the repair of pcb board, practical performance is poor.
Invention content
The invention is intended to provide pcb board repair fixing device, with the pcb board to the location hole with different size aperture It is fixed on the positioning, is convenient for the repair of pcb board.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:Pcb board repair fixing device, including platen, platform Plate is equipped with fixing axle, and fixing axle includes two parallel montants and the width adjustment mechanism between two montants, width Regulating mechanism includes multigroup diamond shape frame being from top to bottom arranged in order;Every group of diamond shape frame includes head and the tail successively hinged four Root connecting rod, and diamond shape frame includes the joint angle of the slide angle and two faces of two faces, two slides angle slide respectively It is connected on two montants, adjacent two joint angles are hinged between neighboring diamonds frame, and the joint angle of the top is hinged On montant, the joint angle of bottom is hinged with strut, and strut is connected with pulling mechanism.
The principle of this programme is:When practical application, platen carries pcb board to place pcb board, and fixing axle is used Pcb board is fixed with the location hole on pcb board, keeps the stabilization of pcb board.Montant in fixing axle is as fixation The supportive body of axis carries out location hole to stablize support, width adjustment mechanism to adjust the distance between two montants width, So that the distance between two montants and the aperture of location hole are adapted, to enable the side of two montants be pushed against location hole It is carried out on inner wall and to pcb board effectively fixed.Strut is pushing and pulling diamond shape frame so that diamond shape frame is flexible and enables two slidings The distance between angle changes, so that the distance between two montants change, reaches the positioning to different pore size Hole carries out effectively fixed purpose.The power source that pulling mechanism is then moved as strut so that strut moves and realizes fixing axle The adjusting of width changes.
The advantages of this programme is:
1, abutting fixation is carried out to location hole using the fixing axle of the adjustable variation of width, multiple hole can be adapted to The location hole of diameter size ensures effective fixation to the pcb board of a variety of size specifications, operation easy to repair.
2, fixing axle uses the composite structure of diamond shape frame and montant, utilizes the unstable characteristic of diamond shape frame so that water chestnut The distance between the width of shape frame changes, and then change two montants, achieve the purpose that change fixed axial extent, be convenient for Adjusting operation to fixed axial extent, and montant also increases the contact area between diamond shape frame and the hole wall of location hole, energy It enough avoids the slide angle of diamond shape frame from directly being contacted with the hole wall of location hole, in turn results in asking of being slipped on the hole wall of location hole Topic, is kept fixed the stable state of axle construction.
Preferably, as an improvement, pulling mechanism includes the runner of rotation setting, the eccentric position rotation connection of runner There are swing arm, the outside of runner to be equipped with rocker, the free end of swing arm is hinged on rocker, and is also hinged with push-pull rod on rocker, is pushed away The free end of pull rod is hinged with rack, and rack is slidably connected on platen, and gear is engaged on rack, is fixedly connected on gear It is in the U-shaped structure of lateral inversion to have extrusion head, platen, and platen includes upper platen and lower platen, sliding between upper platen and lower platen Dynamic to be equipped with movable plate, the end of movable plate is equipped with the wedge surface to offset with extrusion head interval, and the free end of strut is connected to movable plate On.When human hand runner rotates, swing arm can be driven to swing, swing arm pulls rocker to swing, to push push-pull rod by rocker Movement, push-pull rod band carry-over bar move in a straight line so that are rotated with rack meshed gears, the extrusion head connected on gear It deflects and is against on the wedge surface of movable plate, and movable plate is above pushed away, movable plate is mobile and strut is driven to move so that diamond shape Frame, which stretches and the distance between enables width increase, and then promote two montants, to change.It is realized as a result, by rotating wheel Adjusting to fixed axial extent, due to the use of the structure of runner and swing arm, process that the path of runner rotation is swung in swing arm In be reduced, and then be transferred on movable plate by rack-and-pinion, pass through the swing of extrusion head so that movable plate is occurred Compared with thin tail sheep, it is achieved in the relatively minor adjustment to fixed axial extent, achievees the purpose that fine tuning, so that it meets determining for different pore size Position hole.
Preferably, as an improvement, between movable plate and lower platen be equipped with mandril, mandril be threaded through on lower platen and with Lower platen is slidably connected, and mandril and strut are slidably connected with movable plate, and resetting spring is arranged on mandril;Movable plate and platen U-lag body slot bottom between be equipped with air bag, air bag is connected with for the tracheae for pcb board surface dust, the free end position of tracheae In the top of platen.Mandril keeps the steady movement of movable plate being supported to motion bar, and resetting spring is making activity Plate automatically resets, in order to which next pcb board is fixed.When movable plate is squeezed the extruding of head, there is vertical side To the stress with horizontal direction, to make movable plate while moving up, transversely move and extruding gasbag, air bag from tracheae to Pcb board on platen is blown, and the dust on pcb board is blown down, consequently facilitating observation and repair to pcb board, convenient for actually answering With.And pcb board is bigger, the amplitude of rotating wheel is bigger, and the extruding degree that movable plate is subject to is bigger, and the lateral displacement of movable plate is just Bigger, thus movable plate is bigger to the extruding degree of air bag, the capacity of tracheae is more, so as to larger pcb board into Row effective dedusting comprehensively.
Preferably, as an improvement, pipeline being equipped on upper platen, pipeline upper end is equipped with the sucker communicated with pipeline, The piston of clearance fit is equipped in pipeline, piston is connected with tension spring and drawstring, and tension spring is for making piston reset, the free end of drawstring It stretches out pipeline and is fixedly connected between movable plate, and be equipped with fixed pulley on the outside of pipeline, drawstring is arranged across fixed pulley.Work as activity When plate moves up, shifting movement is descended in pipeline by drawstring band piston by makes pipeline upper end air-breathing, the air pressure in pipeline is big at this time Thus enhance the fixed effect to pcb board so that pcb board is absorbed and fixed on platen by sucker in extraneous air pressure.
Preferably, as an improvement, sucker is in up big and down small cone structure.In this way, compared to the sucker of straight-tube shape, increase The big contact area of sucker and pcb board, enhances the fixed effect to pcb board.
Preferably, as an improvement, the free end of tracheae is connected with the blowing cover of taper, and one far from tracheae is covered in blowing End is big end.In this way, the exhausted range of tracheae is increased, to enhance the effect of dedusting.
Description of the drawings
Fig. 1 is the front view of the embodiment of the present invention.
Fig. 2 is the structure chart of fixing axle in Fig. 1.
Specific implementation mode
Below by specific implementation mode, the present invention is described in further detail:
Reference numeral in Figure of description includes:Upper platen 1, lower platen 2, movable plate 3, mandril 4, air bag 5, tracheae 6, Fixing axle 7, diamond shape frame 9, strut 10, runner 11, swing arm 12, rocker 13, push-pull rod 14, rack 15, gear 16, is squeezed montant 8 Pressure head 17, pipeline 18, sucker 19, fixed pulley 20.
Embodiment is as shown in Figure 1:Pcb board repair fixing device includes in the platen of the U-shaped structure of lateral inversion, platform Plate includes parallel upper platen 1 and lower platen 2, and upper platen 1 is equipped with fixing axle 7, and in conjunction with shown in Fig. 2, fixing axle 7 includes two Parallel montant 8 and the width adjustment mechanism between two montants 8.Width adjustment mechanism includes from top to bottom being arranged in order Three groups of diamond shape frames 9.Every group of diamond shape frame 9 includes head and the tail hinged four connecting rods successively, and diamond shape frame 9 includes two The joint angle of the slide angle of a face and two faces is equipped with sliding rail on montant 8, card column is equipped on two slides angle, blocks Column is slided and is fastened in sliding rail, and adjacent two joint angles are hinged between neighboring diamonds frame 9, the joint angle of the top It is hinged with horizontal axis, one end welding of the horizontal axis far from joint angle on a montant 8, is hinged with branch wherein in the joint angle of bottom Bar 10, strut 10 are connected with pulling mechanism.
Pulling mechanism includes the movable plate 3 between upper platen 1 and lower platen 2, and movable plate 3 is parallel with upper platen 1, and The outer end of movable plate 3 is equipped with wedge surface, and mandril 4 is equipped between movable plate 3 and lower platen 2, and mandril 4 is threaded through on lower platen 2 simultaneously It is slidably connected with lower platen 2, the specific slip connection mode between mandril 4 and lower platen 2 is:Mandril 4 is equipped with vertical card The inner wall of slot, the perforation worn for mandril 4 on lower platen 2 is equipped with vertical flange, and flange is fastened in card slot.On mandril 4 It is arranged with resetting spring.Movable plate 3 is equipped with slot rolling, is equipped with idler wheel on mandril 4 and strut 10, idler wheel be arranged in slot rolling and So that mandril 4 and strut 10 are slidably connected on movable plate 3.Pulling mechanism further includes the runner 11 being arranged by bearing rotation, The eccentric position of runner 11 is equipped with axis pin, and rotating cylinder is arranged on axis pin, and rotating cylinder is welded with swing arm 12, and the outside of runner 11, which is equipped with, shakes Plate 13,13 outside of rocker are equipped with frame body, and the lower end of rocker 13 is rotatably connected on by positioning pin on frame body, the free end of swing arm 12 It is hinged on the upper end of rocker 13, and 13 upper end of rocker is also hinged with push-pull rod 14, the free end of push-pull rod 14 is hinged with rack 15, arm is welded on lower platen 2, arm bottom end is equipped with clamp, and rack 15 is equipped with bar-shaped trough, and clamp is caught in bar-shaped trough, So that rack 15 is slidably connected with lower platen 2, and is engaged with gear 16 on rack 15, it is welded between inclined-plane on gear 16 It has a rest the extrusion head 17 to offset, extrusion head 17 is that circle is taken turns.
Air bag 5 is equipped between 3 inner end of movable plate and the U-lag body slot bottom of platen, air bag 5 is connected with for being pcb board table The free end of the tracheae 6 of face dedusting, tracheae 6 is welded with the blowing cover of taper, and the one end of blowing cover far from tracheae 6 is big end and position Above upper platen 1.
Be equipped with vertical pipeline 18 on upper platen 1,18 upper end of pipeline be equipped with the sucker 19 that is communicated inside pipeline 18, inhale Disk 19 is in up big and down small cone structure, and the piston of clearance fit is equipped in pipeline 18, and piston is connected with tension spring and drawstring, tension spring For making piston reset, the free end of drawstring, which is stretched out pipeline 18 and bolted between movable plate 3, to be fixed, and 18 outside of pipeline is equipped with Fixed pulley 20, drawstring are arranged across fixed pulley 20.
In the present embodiment, when practical application, when initial, 7 width of fixing axle is smaller, and fixing axle 7 is passed through pcb board at this time Location hole, and pcb board is positioned on sucker 19, the slow rotating wheel 11 of human hand, runner 11 drives swing arm 12 to swing, swing arm 12 The upper end of rocker 13 is driven to swing, 13 upper end of rocker swings and pushes push-pull rod 14 so that push-pull rod 14 pushes rack 15 laterally Sliding, rack 15 push gear 16 to rotate, and gear 16 drives the movement of extrusion head 17 and makes 17 Compressive activities plate of extrusion head, 3 outer end Wedge surface, extrusion head 17, which makes every effort to promote the squeezing action of wedge surface, to be kept movable plate 3 upward simultaneously and moves downward, at this time movable plate 3 and branch Laterally opposed movement occurs between bar 10, between movable plate 3 and mandril 4.Movable plate 3 moves and mandril 4 is driven to move up and will prop up Bar 10 above pushes away, and resetting spring deforms upon.Strut 10 moves up and diamond shape frame 9 is pushed to stretch at this time so that the width of diamond shape frame 9 Degree becomes larger, and the distance between two montants 8 broaden and are pushed against on the hole wall of location hole automatically, thus fix pcb board, completes Adjusting to 7 width of fixing axle adapts it to the aperture of location hole.Meanwhile movable plate 3 moves up and pulls piston by drawstring It being moved down in pipeline 18, tension spring deforms upon, and the air pressure in pipeline 18 increases and adsorbs pcb board by sucker 19 and fix, into One step enhances the fixed effect to pcb board.19 tapered structure of sucker compares straight structure, increases sucker 19 and PCB The contact area of plate, to enhance the fixed effect to pcb board, in order to repair.While movable plate 3 moves, gas is squeezed Capsule 5, air bag 5 are blown from tracheae 6 to pcb board surface, and the dust on pcb board is blown down and is cleared up plate body, in order to tie up Observation when repairing, facilitates maintenance operation.
After completing repair, runner 11 is rotated backward, and rack 15 is enabled to move backward, rack 15 pushes gear 16 reversely to transport Dynamic, movable plate 3 loses the squeezing action power of extrusion head 17, and air bag 5 restores deformation and movable plate 3 is pushed return, and gas at this time Capsule 5 restores deformation and sucks air, in order to exhaust dust-removing next time.Movable plate 3 is pulled down and enables activity by resetting spring simultaneously 3 Rapid reset of plate, tension spring also drive piston reset and release the absorption fixed function power to pcb board, pcb board is discharged.Activity Plate 3 resets simultaneously pulls diamond shape frame 9 to reset by strut 10, the width of fixing axle 7 restore to original state and with location hole Hole wall detaches, and cancels the fixed function to pcb board, pcb board is removed from sucker 19 and fixing axle 7.
When location hole is larger, human hand increases the amplitude of rotating wheel 11, so that the degree of displacement of rack 15 becomes larger, Gear 16 also becomes larger the extruding degree of movable plate 3, so that shift length and movable plate 3 that strut 10 moves up are to air bag 5 Extruding degree increase, strut 10 pushes 9 extension degree of diamond shape frame to become larger, and the distance between two montants 8 are further at this time Become larger and be adapted to the larger location hole in aperture, to keep effective fixation to the pcb board with larger location hole.Movable plate 3 Degree of displacement while increase, drive the displacement of piston motion also to increase, sucker 19 increases the absorption dynamics of pcb board at this time By force, to ensure to fix stablizing for larger pcb board.It, can be to larger and at this point, air bag 5 increases the air blowing degree of pcb board Pcb board carry out effective dedusting comprehensively, enhance to the treatment effect of pcb board, it is easy to repair.
Above-described is only the embodiment of the present invention, the common sense such as well known specific technical solution and/or characteristic in scheme It does not describe excessively herein.It should be pointed out that for those skilled in the art, before not departing from technical solution of the present invention It puts, several modifications and improvements can also be made, these should also be considered as protection scope of the present invention, these all do not interfere with this Invent the effect and patent practicability implemented.The scope of protection required by this application should be based on the content of the claims, The records such as the specific implementation mode in specification can be used for explaining the content of claim.

Claims (6)

1.PCB plate repair fixing devices, including platen, platen are equipped with fixing axle, it is characterised in that:The fixing axle includes Two parallel montants and the width adjustment mechanism between two montants, width adjustment mechanism include it is multigroup from top to bottom according to The diamond shape frame of secondary arrangement;Every group of diamond shape frame includes head and the tail hinged four connecting rods successively, and diamond shape frame includes two The joint angle of the slide angle of a face and two faces, two slides angle are slidably connected at respectively on two montants, neighboring diamonds Adjacent two joint angles are hinged between frame, and the joint angle of the top is hinged on montant, the joint angle hinge of bottom It is connected to strut, strut is connected with pulling mechanism.
2. pcb board repair fixing device according to claim 1, it is characterised in that:The pulling mechanism includes rotation The eccentric position of the runner of setting, runner is rotatably connected to swing arm, and the outside of runner is equipped with rocker, and the free end of swing arm is hinged on On rocker, and push-pull rod being also hinged on rocker, the free end of push-pull rod is hinged with rack, and rack is slidably connected on platen, And gear is engaged on rack, extrusion head is fixedly connected on gear, the platen is in the U-shaped structure of lateral inversion, platen packet Upper platen and lower platen are included, sliding is equipped with movable plate between upper platen and lower platen, and the end of movable plate is equipped between extrusion head It has a rest the wedge surface to offset, the free end of the strut is connected on movable plate.
3. pcb board repair fixing device according to claim 2, it is characterised in that:The movable plate and lower platen it Between be equipped with mandril, mandril is threaded through on lower platen and is slidably connected with lower platen, and mandril and strut are slidably connected with movable plate, Resetting spring is arranged on mandril;Air bag is equipped between the movable plate and the U-lag body slot bottom of platen, air bag, which is connected with, to be used for For the tracheae of pcb board surface dust, the free end of tracheae is located at the top of platen.
4. pcb board repair fixing device according to claim 3, it is characterised in that:It is equipped with pipe on the upper platen Road, pipeline upper end are equipped with the sucker communicated with pipeline, the piston of clearance fit are equipped in pipeline, and piston is connected with tension spring and drawing Rope, tension spring for making piston reset, stretch out pipeline and be fixedly connected between movable plate, and is set on the outside of pipeline by the free end of drawstring There are fixed pulley, drawstring to be arranged across fixed pulley.
5. pcb board repair fixing device according to claim 4, it is characterised in that:The sucker is in up big and down small Cone structure.
6. pcb board repair fixing device according to claim 5, it is characterised in that:The free end of the tracheae connects There is the blowing cover of taper, the one end of blowing cover far from tracheae is big end.
CN201810610068.XA 2018-06-13 2018-06-13 Pcb board repair fixing device Pending CN108544400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810610068.XA CN108544400A (en) 2018-06-13 2018-06-13 Pcb board repair fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810610068.XA CN108544400A (en) 2018-06-13 2018-06-13 Pcb board repair fixing device

Publications (1)

Publication Number Publication Date
CN108544400A true CN108544400A (en) 2018-09-18

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CN201810610068.XA Pending CN108544400A (en) 2018-06-13 2018-06-13 Pcb board repair fixing device

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CN (1) CN108544400A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066915A (en) * 2018-09-28 2018-12-21 蒋西洲 A kind of wireless charger
CN109986707A (en) * 2019-03-30 2019-07-09 蚌埠朝阳玻璃机械有限公司 A kind of ultra-thin flat glass cutting machine
CN112049298A (en) * 2020-09-27 2020-12-08 安徽博铸建筑工程有限公司 Aluminum veneer curtain wall
CN113001440A (en) * 2021-03-04 2021-06-22 史程锋 Circuit board positioning tool for circuit board machining
CN113183030A (en) * 2021-05-10 2021-07-30 成都先进金属材料产业技术研究院股份有限公司 Metallographic specimen grinds anchor clamps

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202555933U (en) * 2012-03-02 2012-11-28 廖怀宝 Printed circuit board clamp apparatus
CN103991044A (en) * 2014-05-30 2014-08-20 苏州倍辰莱电子科技有限公司 PCB clamp
CN106493769A (en) * 2016-09-29 2017-03-15 成都鼎翔通信技术有限公司 The board separator of suitable for multiple sizes pcb board
CN206790882U (en) * 2017-06-08 2017-12-22 四川长虹电器股份有限公司 A kind of pcb board device for positioning and securing of inserter
CN208262682U (en) * 2018-06-13 2018-12-21 重庆合聚达智能装备有限公司 The fixed device of pcb board maintenance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202555933U (en) * 2012-03-02 2012-11-28 廖怀宝 Printed circuit board clamp apparatus
CN103991044A (en) * 2014-05-30 2014-08-20 苏州倍辰莱电子科技有限公司 PCB clamp
CN106493769A (en) * 2016-09-29 2017-03-15 成都鼎翔通信技术有限公司 The board separator of suitable for multiple sizes pcb board
CN206790882U (en) * 2017-06-08 2017-12-22 四川长虹电器股份有限公司 A kind of pcb board device for positioning and securing of inserter
CN208262682U (en) * 2018-06-13 2018-12-21 重庆合聚达智能装备有限公司 The fixed device of pcb board maintenance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066915A (en) * 2018-09-28 2018-12-21 蒋西洲 A kind of wireless charger
CN109986707A (en) * 2019-03-30 2019-07-09 蚌埠朝阳玻璃机械有限公司 A kind of ultra-thin flat glass cutting machine
CN112049298A (en) * 2020-09-27 2020-12-08 安徽博铸建筑工程有限公司 Aluminum veneer curtain wall
CN113001440A (en) * 2021-03-04 2021-06-22 史程锋 Circuit board positioning tool for circuit board machining
CN113183030A (en) * 2021-05-10 2021-07-30 成都先进金属材料产业技术研究院股份有限公司 Metallographic specimen grinds anchor clamps

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Application publication date: 20180918