CN111319012B - Equipment for assembling electronic product - Google Patents

Equipment for assembling electronic product Download PDF

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Publication number
CN111319012B
CN111319012B CN202010136049.5A CN202010136049A CN111319012B CN 111319012 B CN111319012 B CN 111319012B CN 202010136049 A CN202010136049 A CN 202010136049A CN 111319012 B CN111319012 B CN 111319012B
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China
Prior art keywords
seat
clamping
fixed
assembly
sliding
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Active
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CN202010136049.5A
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Chinese (zh)
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CN111319012A (en
Inventor
王苗苗
解铭
李慧
李娜
张建琨
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Handan College
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Handan College
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Priority to CN202010136049.5A priority Critical patent/CN111319012B/en
Publication of CN111319012A publication Critical patent/CN111319012A/en
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Publication of CN111319012B publication Critical patent/CN111319012B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25HWORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/02Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of table type
    • B25H1/04Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby of table type portable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25HWORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/10Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting holders for tool or work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25HWORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/12Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with storage compartments

Abstract

The invention discloses equipment for assembling electronic products, which comprises an assembly table, a fixing plate, clamping pieces and positioning components, wherein four corners of the assembly table are fixed on a supporting seat by adopting supporting rods, one side of the assembly table is also fixed with the fixing plate by adopting a bracket, at least four positioning components are embedded in the assembly table and are arranged in a rectangular shape so as to clamp and position four corners of a circuit board, two groups of clamping pieces are symmetrically arranged on the assembly table and are respectively fixed at a movable end of an electric telescopic rod so as to clamp two sides of the circuit board under the driving of the electric telescopic rod and provide pneumatic buffering for the circuit board, a plurality of groups of elastic rubbers are connected with limiting rods at the top of a sliding seat in the equipment, so that certain buffering is provided for the limiting rods in the vertical direction, and the positioning holes of the circuit board are protected, the positioning efficiency is improved.

Description

Equipment for assembling electronic product
Technical Field
The invention particularly relates to the technical field of electronic product assembly, and particularly relates to equipment for assembling an electronic product.
Background
With the rapid development of the manufacturing industry, electronic products have also made a dramatic progress, and all electronic products use a circuit board as their main body, which integrates many electronic components such as transistors on a silicon chip, so that the electronic products are more miniaturized, and when assembling, the electronic products need to use an assembly bench to perform auxiliary assembly, so as to weld small components on the circuit board, thereby realizing integration.
However, the traditional assembly equipment cannot realize rapid positioning and clamping of the circuit board in the process of positioning the circuit board, so that the assembly efficiency is not high, the overall assembly convenience is reduced, and the circuit board is easily damaged due to non-flexible positioning. Accordingly, one skilled in the art provides an apparatus for assembling electronic products to solve the above problems in the background art.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an equipment for electronic product assembly, includes assembly bench, fixed plate, clamping piece and locating component, wherein, four edges of assembly bench adopt the bracing piece to be fixed in on the supporting seat, one side of assembly bench still adopts the support to be fixed with the fixed plate, the inside embedding of assembly bench has four locating component at least, and four locating component is the rectangle and arranges to four corners of chucking location circuit board, the symmetry is provided with two sets of clamping pieces, two on the assembly bench the clamping piece is fixed respectively at electric telescopic handle's movable end to under electric telescopic handle's drive, press from both sides tightly to the both sides of circuit board.
Further, as preferred, the locating component includes base, floating seat and gag lever post, wherein the base is the concave solid of revolution of cross section, the base is fixed embedding in the assembly bench, the recess internal fixation of base has the bayonet socket subassembly, the bayonet socket subassembly adopts a plurality of buffer spring to support jointly and is connected with the floating seat, the floating seat is arranged in the assembly bench outward.
The middle part of the floating seat is provided with a through hole for being connected with a limiting rod in a sliding mode, and the limiting rod is adjusted up and down by adopting a buffering adjusting assembly.
Further, preferably, the buffering adjustment assembly comprises a buffering assembly and a height adjustment assembly, wherein the buffering assembly comprises a sliding seat and elastic rubber, a sliding groove is formed in a groove of the base so as to be connected with the sliding seat in a sliding manner, a plurality of groups of elastic rubber are connected with a limiting rod at the top of the sliding seat, the limiting rod is in a stepped shaft shape, and the diameter of one end, close to the elastic rubber, of the limiting rod is the same as the inner diameter of the sliding groove; the limiting ring seat is coaxially fixed on the outer circumference of the middle of the sliding seat and driven by the height adjusting assembly to perform vertical height adjustment, so that the sliding seat and the limiting rod are driven to perform vertical height adjustment, and the limiting rod can extend out of or be hidden in the floating seat.
Further, as preferred, height adjusting subassembly includes adjusting nut, shifting disk, carriage release lever and adjusting screw, wherein, adjusting screw is coaxial to be fixed in the bottom of base, and the external mount table setting of arranging in, coaxial slip cover is equipped with the shifting disk on the adjusting screw, last threaded connection that still has adjusting nut of adjusting screw, just adjusting nut's rotation can drive shifting disk reciprocates, the circumference array has a plurality of carriage release levers on the shifting disk, a plurality of sliding holes corresponding with the carriage release lever have been seted up on a certain circumference in the outside of the sliding tray of base to sliding connection carriage release lever, the one end that the carriage release lever was kept away from to the carriage release lever supports with spacing ring seat mutually and leans on.
Further, as preferred, the cassette subassembly includes mount pad, cassette one and cassette two, the solid of revolution that logical groove was seted up at the middle part is to mount pad, cassette one and cassette two to through gag lever post and sliding seat, the mount pad adopts the bolt fastening in the recess of base, be fixed with cassette one and cassette two on the mount pad, form annular clamping groove between cassette one and the cassette two, be provided with a plurality of buffer spring in the annular clamping groove, a plurality of buffer spring support jointly is connected with the seat that floats.
Further, as preferred, locating component still includes the protection piece, the coaxial cover of protection piece is established in the outside of gag lever post and sliding seat, the protection piece includes fixed cover one, elastic sleeve and fixed cover two, fixed cover one is fixed attached on the interior circumference of mount pad, the upper end coaxial coupling of fixed cover one has the elastic sleeve, the other end coaxial coupling of elastic sleeve has fixed cover two, fixed cover two adopts the screw rod to fix the bottom at the floating seat.
Further, preferably, the length from the first fixing sleeve to the bottom of the groove of the base can satisfy the moving distance of the limiting rod extending out of or hidden in the floating seat.
Further, as preferred, the clamping piece is the clamping jaw, and it includes presss from both sides tight arm, fixed cassette and jack catch, it fixes at electric telescopic handle's portable end to press from both sides tight arm, the other end that presss from both sides tight arm is fixed continuous with fixed cassette, the jack catch is installed to the other end detachable of fixed cassette, the other end sealing connection of jack catch has the cardboard, just can constitute an airtight space between cardboard and the jack catch.
Further, as preferred, the middle part of cardboard is the elasticity bag, airtight space is aerifyd by the gas tube, the one end of gas tube passes fixed cassette and jack catch and stretches into in airtight space, the other end of gas tube links to each other with outside miniature air pump.
Further, as preferred, four corner positions in the bottom of supporting seat department is provided with the removal wheel, be provided with picture paper clamp and tool holder on the fixed plate, a side of assembly bench still is fixed with the receiver.
Compared with the prior art, the invention has the beneficial effects that: in the device, the top of the sliding seat is connected with the limiting rod by adopting a plurality of groups of elastic rubbers, so that certain buffer is provided for the limiting rod in the vertical direction, and the positioning hole of the circuit board is protected; in addition, the floating seat arranged in the device can provide buffer for the circuit board placed on the floating seat, and the circuit board is prevented from being damaged in the welding and assembling process of electronic parts; in addition, when the clamping jaw is used for clamping a circuit board, the electric telescopic rod is controlled firstly to enable the elastic bag to be in contact with the edge of the circuit board, and then the external miniature air pump is controlled to work to provide sufficient air for the closed space, so that the elastic bag expands to a certain degree, and the circuit board is wrapped and clamped to provide pneumatic buffering for the circuit board.
Drawings
FIG. 1 is a schematic perspective view of an apparatus for assembling an electronic product;
FIG. 2 is a schematic structural diagram of a fixing plate in an apparatus for assembling electronic products;
FIG. 3 is a first schematic view of a first buffer adjustment assembly of an apparatus for assembling electronic products;
FIG. 4 is a second schematic view of a buffering adjustment assembly of an apparatus for assembling electronic products;
FIG. 5 is a schematic view of a jaw of an apparatus for assembling electronic products;
in the figure: 1. a moving wheel; 2. a supporting seat; 3. a storage box; 4. an assembly table; 5. a fixing plate; 6. a clamping member; 7. a support; 8. a drawing paper clip; 9. a tool slot; 10. an electric telescopic rod; 11. a clamping jaw; 12. a positioning assembly; 13. a base; 14. a floating seat; 15. a limiting rod; 16. a sliding seat; 17. a mounting seat; 18. a first card holder; 19. a second card holder; 20. adjusting the nut; 21. a movable tray; 22. a travel bar; 23. adjusting the screw rod; 24. fixing a sleeve I; 25. an elastic sleeve; 26. fixing a second sleeve; 27. an elastic rubber; 28. fixing the card holder; 29. a claw; 30. clamping a plate; 31. an elastic bag; 32. and an inflation tube.
Detailed Description
Referring to fig. 1 to 5, in the embodiment of the present invention, an apparatus for assembling an electronic product includes an assembly table 4, a fixing plate 5, clamping members 6, and positioning assemblies 12, wherein four corners of the assembly table 4 are fixed on a supporting base 2 by using supporting rods, one side of the assembly table 4 is further fixed with the fixing plate 5 by using a bracket 7, at least four positioning assemblies 12 are embedded in the assembly table 4, the four positioning assemblies 12 are arranged in a rectangular shape so as to clamp and position four corners of a circuit board, two groups of clamping members 6 are symmetrically arranged on the assembly table 4, and the two clamping members 6 are respectively fixed at a movable end of an electric telescopic rod 10 so as to clamp two sides of the circuit board under the driving of the electric telescopic rod 10.
As shown in fig. 3, the positioning assembly 12 includes a base 13, a floating seat 14 and a limiting rod 15, wherein the base 13 is a revolving body with a concave cross section, the base 13 is fixedly embedded in the assembly table 4, a clamping seat assembly is fixed in a groove of the base 13, the clamping seat assembly is supported and connected with the floating seat 14 by a plurality of buffer springs, and the floating seat 14 is externally arranged on the assembly table 4.
The middle part of the floating seat 14 is provided with a through hole for being connected with a limiting rod 15 in a sliding manner, and the limiting rod 15 is adjusted up and down by adopting a buffer adjusting component.
As a preferred embodiment, the buffering adjustment assembly comprises a buffering assembly and a height adjustment assembly, wherein the buffering assembly comprises a sliding seat 16 and an elastic rubber 27, a sliding groove is formed in a groove of the base 13 so as to be slidably connected with the sliding seat 16, the top of the sliding seat 16 is connected with a limiting rod 15 by adopting a plurality of groups of elastic rubbers 27, so that a certain buffering effect is provided for the limiting rod 15 in the vertical direction, which is beneficial to protecting a positioning hole of a circuit board, in addition, because the limiting rod 15 is connected with the sliding seat by adopting the elastic rubber, the limiting rod 15 can be inclined in the radial direction thereof, so that the positioning hole of the circuit board is allowed to have a manufacturing error, the limiting rod 15 is in a stepped shaft shape, and the diameter of one end of the limiting rod 15, which is close to the elastic rubbers 27, is; the limiting ring seat is coaxially fixed on the outer circumference of the middle of the sliding seat 16 and driven by the height adjusting assembly to perform vertical height adjustment, so that the sliding seat 16 and the limiting rod 15 are driven to perform vertical height adjustment, and the limiting rod 15 can extend out or be hidden in the floating seat 14.
As a preferred embodiment, the height adjusting assembly includes an adjusting nut 20, a moving plate 21, a moving rod 22 and an adjusting screw 23, wherein the adjusting screw 23 is coaxially fixed at the bottom of the base 13 and is disposed outside the assembly table 4, the moving plate 21 is coaxially slidably sleeved on the adjusting screw 23, the adjusting screw 23 is further threadedly connected with the adjusting nut 20, the adjusting nut 20 rotates to drive the moving plate 21 to move up and down, the moving plate 21 is circumferentially arrayed with a plurality of moving rods 22, a plurality of sliding holes corresponding to the moving rods 22 are formed on a certain circumference outside a sliding groove of the base 13 so as to slidably connect the moving rods 22, one end of the moving rod 22, which is far away from the moving rod 21, abuts against the limit ring seat, the moving plate can be driven to move up and down by rotating the adjusting nut, so as to drive the moving rods 22 to move up and down, the moving rod 22 abuts against the stop ring seat, so as to drive the stop ring seat to move up and down and drive the sliding seat 16 and the stop rod 15 to move.
In this embodiment, the clamping seat assembly includes a mounting seat 17, a first clamping seat 18 and a second clamping seat 19, the middle of each of the mounting seat 17, the first clamping seat 18 and the second clamping seat 19 is a revolving body with a through groove formed in the middle thereof, so as to pass through the limiting rod 15 and the sliding seat 16, the mounting seat 17 is fixed in the groove of the base 13 by bolts, the first clamping seat 18 and the second clamping seat 19 are fixed on the mounting seat 17, an annular clamping groove is formed between the first clamping seat 18 and the second clamping seat 19, a plurality of buffer springs are arranged in the annular clamping groove, and the plurality of buffer springs are jointly supported and connected with the floating seat 14, so that the floating seat 14 can provide a buffer for a circuit board placed on the floating seat, and the circuit board is prevented from being damaged in the.
In this embodiment, the positioning assembly 12 further includes a protection component, the protection component is coaxially sleeved outside the limiting rod 15 and the sliding seat 16, the protection component includes a first fixing sleeve 24, an elastic sleeve 25 and a second fixing sleeve 26, the first fixing sleeve 24 is fixedly attached to the inner circumference of the mounting seat 17, the upper end of the first fixing sleeve 24 is coaxially connected with the elastic sleeve 25, the other end of the elastic sleeve 25 is coaxially connected with the second fixing sleeve 26, and the second fixing sleeve 26 is fixed at the bottom of the floating seat 14 by a screw.
In this embodiment, the length from the first fixing sleeve 24 to the bottom of the groove of the base 13 can satisfy the moving distance of the limiting rod 15 extending out of or hidden in the floating seat 14.
As shown in fig. 5, the clamping member 6 is a clamping jaw 11, and includes a clamping arm, a fixed clamping seat 28 and a clamping jaw 29, the clamping arm is fixed at the movable end of the electric telescopic rod 10, the other end of the clamping arm is fixedly connected to the fixed clamping seat 28, the clamping jaw 29 is detachably mounted at the other end of the fixed clamping seat 28, the other end of the clamping jaw 29 is hermetically connected to a clamping plate 30, and a closed space can be formed between the clamping plate 30 and the clamping jaw 29.
In this embodiment, the middle part of the clamping plate 30 is an elastic bag 31, the closed space is inflated by an inflation tube 32, one end of the inflation tube 32 penetrates through the fixed clamping seat 28 and the clamping jaw 29 and extends into the closed space, the other end of the inflation tube 32 is connected with an external miniature air pump, when a circuit board is clamped, the electric telescopic rod is controlled firstly to enable the elastic bag 21 to be in contact with the edge of the circuit board, then the external miniature air pump is controlled to work, sufficient air is provided for the closed space, the elastic bag 31 expands to a certain degree, and therefore the circuit board is clamped by the package and pneumatic buffering is provided for the circuit board.
In this embodiment, four corner positions in the bottom of supporting seat 2 are provided with removal wheel 1, be provided with picture paper clamp 8 and tool groove 9 on fixed plate 5, a side of mount table 4 still is fixed with receiver 3.
In the device, the top of the sliding seat is connected with the limiting rod by adopting a plurality of groups of elastic rubbers, so that certain buffer is provided for the limiting rod in the vertical direction, and the positioning hole of the circuit board is protected; in addition, the floating seat arranged in the device can provide buffer for the circuit board placed on the floating seat, and the circuit board is prevented from being damaged in the welding and assembling process of electronic parts; in addition, when the clamping jaw is used for clamping a circuit board, the electric telescopic rod is controlled firstly to enable the elastic bag to be in contact with the edge of the circuit board, and then the external miniature air pump is controlled to work to provide sufficient air for the closed space, so that the elastic bag expands to a certain degree, and the circuit board is wrapped and clamped to provide pneumatic buffering for the circuit board.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims (8)

1. The utility model provides an equipment for electronic product assembly, includes assembly stand, fixed plate, clamping piece and locating component, wherein, four edges of assembly stand adopt the bracing piece to be fixed in on the supporting seat, one side of assembly stand still adopts the support to be fixed with the fixed plate, its characterized in that, the inside embedding of assembly stand has four locating component at least, and four locating component is the rectangle and arranges to four corners of chucking location circuit board, still the symmetry is provided with two sets of clamping pieces on the assembly stand, two the clamping piece is fixed respectively in electric telescopic handle's movable end, so that under electric telescopic handle's drive, presss from both sides tightly to the both sides of circuit board;
the positioning assembly comprises a base, a floating seat and a limiting rod, wherein the base is a revolving body with a concave cross section, the base is fixedly embedded in the assembly table, a clamping seat assembly is fixed in a groove of the base, the clamping seat assembly is jointly supported and connected with the floating seat through a plurality of buffer springs, and the floating seat is externally arranged on the assembly table;
the middle part of the floating seat is provided with a through hole for being connected with a limiting rod in a sliding manner, and the limiting rod adopts a buffer adjusting component to adjust up and down;
the buffer adjusting assembly comprises a buffer assembly and a height adjusting assembly, wherein the buffer assembly comprises a sliding seat and elastic rubber, a sliding groove is formed in a groove of the base so as to be connected with the sliding seat in a sliding mode, the top of the sliding seat is connected with a limiting rod through a plurality of groups of elastic rubber, the limiting rod is in a stepped shaft shape, and the diameter of one end, close to the elastic rubber, of the limiting rod is the same as the inner diameter of the sliding groove; the limiting ring seat is coaxially fixed on the outer circumference of the middle of the sliding seat and driven by the height adjusting assembly to perform vertical height adjustment, so that the sliding seat and the limiting rod are driven to perform vertical height adjustment, and the limiting rod can extend out of or be hidden in the floating seat.
2. The device for assembling electronic products of claim 1, wherein the height adjustment assembly comprises an adjustment nut, a movable plate, a movable rod and an adjustment screw, wherein the adjustment screw is coaxially fixed at the bottom of the base and is externally arranged on the assembly table, the movable plate is coaxially sleeved on the adjustment screw in a sliding manner, the adjustment screw is further in threaded connection with the adjustment nut, the adjustment nut rotates to drive the movable plate to move up and down, the movable plate is provided with a plurality of movable rods in a circumferential array, a plurality of sliding holes corresponding to the movable rods are formed in one circumference outside the sliding groove of the base, so that the movable rods are slidably connected, and one ends of the movable rods, far away from the movable rods, are abutted against the limiting ring seat.
3. The device for assembling electronic products according to claim 1, wherein the clamping seat assembly comprises a mounting seat, a first clamping seat and a second clamping seat, the mounting seat, the first clamping seat and the second clamping seat are all revolved bodies with through grooves formed in the middle portions, so that the revolved bodies can pass through limiting rods and sliding seats, the mounting seat is fixed in a groove of the base through bolts, the first clamping seat and the second clamping seat are fixed on the mounting seat, an annular clamping groove is formed between the first clamping seat and the second clamping seat, a plurality of buffer springs are arranged in the annular clamping groove, and the floating seat is supported and connected by the buffer springs.
4. The apparatus for assembling electronic products of claim 1, wherein said positioning assembly further comprises a protection member coaxially sleeved outside said limiting rod and said sliding seat, said protection member comprises a first fixing sleeve, an elastic sleeve and a second fixing sleeve, said first fixing sleeve is fixedly attached to the inner circumference of said mounting seat, the upper end of said first fixing sleeve is coaxially connected with said elastic sleeve, the other end of said elastic sleeve is coaxially connected with said second fixing sleeve, and said second fixing sleeve is fixed to the bottom of said floating seat by a screw.
5. An apparatus as claimed in claim 4, wherein the length from the first fixing sleeve to the bottom of the groove of the base is sufficient for the distance the limiting rod moves to extend out of or be hidden in the floating seat.
6. The equipment for assembling electronic products of claim 1, wherein the clamping member is a clamping jaw and comprises a clamping arm, a fixed clamping seat and a clamping jaw, the clamping arm is fixed at the movable end of the electric telescopic rod, the other end of the clamping arm is fixedly connected with the fixed clamping seat, the clamping jaw is detachably mounted at the other end of the fixed clamping seat, a clamping plate is hermetically connected to the other end of the clamping jaw, and a closed space can be formed between the clamping plate and the clamping jaw.
7. The device for assembling electronic products of claim 6, wherein the middle portion of the clamping plate is an elastic bag, the closed space is inflated by an inflation tube, one end of the inflation tube penetrates through the fixing clamping seat and the clamping jaws and extends into the closed space, and the other end of the inflation tube is connected with an external micro air pump.
8. The apparatus as claimed in claim 3, wherein the supporting base has moving wheels at four corners of the bottom thereof, the fixing plate has paper clips and tool slots, and a storage box is fixed to one side of the mounting platform.
CN202010136049.5A 2020-03-02 2020-03-02 Equipment for assembling electronic product Active CN111319012B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010136049.5A CN111319012B (en) 2020-03-02 2020-03-02 Equipment for assembling electronic product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010136049.5A CN111319012B (en) 2020-03-02 2020-03-02 Equipment for assembling electronic product

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CN111319012A CN111319012A (en) 2020-06-23
CN111319012B true CN111319012B (en) 2021-03-02

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645021A (en) * 1979-09-19 1981-04-24 Hitachi Ltd Moving apparatus
CN205290729U (en) * 2015-11-30 2016-06-08 成都市天目电子设备有限公司 Take PCB plate holder of optical compensation device to hold frock
CN206273060U (en) * 2016-12-09 2017-06-20 重庆英洛凡科技有限公司 A kind of LED inserter circuit board stationary fixture
CN207256120U (en) * 2017-09-05 2018-04-20 昆山市亚明磊电子科技有限公司 A kind of positioning tool for pcb board assembling
CN208490081U (en) * 2018-07-23 2019-02-12 东莞万钧电子科技有限公司 Pcb equipment with shock-absorbing function
CN210081235U (en) * 2018-12-28 2020-02-18 星星精密科技(珠海)有限公司 Mobile phone shell positioning fixture

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