CN114679855A - Pressfitting of multilayer printing board folds board structure - Google Patents
Pressfitting of multilayer printing board folds board structure Download PDFInfo
- Publication number
- CN114679855A CN114679855A CN202210331660.2A CN202210331660A CN114679855A CN 114679855 A CN114679855 A CN 114679855A CN 202210331660 A CN202210331660 A CN 202210331660A CN 114679855 A CN114679855 A CN 114679855A
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- Prior art keywords
- circuit board
- sliding
- layer
- board body
- block
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- 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
Links
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 47
- 239000003063 flame retardant Substances 0.000 claims description 16
- 239000002344 surface layer Substances 0.000 claims description 14
- 239000002390 adhesive tape Substances 0.000 claims description 13
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 18
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
The invention discloses a pressing laminated board structure of a multilayer printed board. According to the invention, the circuit board comprises a circuit board body, the surface of the circuit board body is provided with an installation through hole, the center of the circuit board body is provided with a sliding groove, the inside of the sliding groove is slidably connected with a sliding block, an installation block is fixedly connected above the sliding block, an adjustment cross rod is fixed on the surface of one side of the installation block, two ends of the adjustment cross rod are fixedly connected with a holding handle, the circuit board body and another circuit board body are fixed through a laminated base, a sliding rod is arranged inside the laminated base, the distance of the sliding rod can be adjusted, so that the laminated base can be suitable for different installation requirements, and meanwhile, the inside of the installation block is provided with an insulating filler, so that the connection between the circuit board body and the circuit board body is not interfered, and the stability in use is improved.
Description
Technical Field
The invention belongs to the technical field of circuit boards, and particularly relates to a pressing lamination structure of a multilayer printed board.
Background
The circuit board enables the circuit to be miniaturized and visualized, and plays an important role in batch production of fixed circuits and optimization of electric appliance layout. The circuit board can be called as a printed circuit board or a printed circuit board, and the circuit board is also called as a flexible circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent flexibility. The high-density light-weight LED lamp has the characteristics of high wiring density, light weight, thin thickness and good bending property. And the birth and development of the FPC and the PCB of the rigid-flexible Printed Circuit Board (PCB) urge the generation of a new product of the rigid-flexible printed circuit board (FPC). Therefore, the rigid-flex circuit board is a circuit board with FPC (flexible printed circuit) characteristics and PCB (printed circuit board) characteristics, which is formed by combining a flexible circuit board and a rigid circuit board according to relevant process requirements through processes such as pressing and the like.
However, in the conventional plate stacking structure, a supporting and fixing device is lacked among the plates, so that the fixing among the plates is not firm enough.
Disclosure of Invention
The invention aims to: in order to solve the above-mentioned problems, a laminated board structure of a multilayer printed board is provided.
The technical scheme adopted by the invention is as follows: a laminated plate structure of a multilayer printed board comprises a circuit board body, wherein a mounting through hole is formed in the surface of the circuit board body, a sliding groove is formed in the center of the circuit board body, a sliding block is connected inside the sliding groove in a sliding mode, a mounting block is fixedly connected above the sliding block, an adjusting cross rod is fixed on the surface of one side of the mounting block, and two ends of the adjusting cross rod are fixedly connected with holding handles;
the surface of the two sides of the circuit board body is fixedly connected with extension side blocks, extension blocks are movably arranged in the extension side blocks, and resistance adhesive tapes are bonded at the tail ends of the outer sides of the extension blocks;
four corners of the upper surface of circuit board body are fixed with four heels, the last fixed surface of heels is connected with the folded plate base, the inside activity of folded plate base is provided with the slide bar, heels and another circuit board body fixed connection are passed through at the top of slide bar, the screw hole has been seted up on the surface of slide bar, folded plate base connection has fixing screw two, fixing screw two runs through the inside of folded plate base threaded connection at the screw hole.
In a preferred embodiment, the outer edge of the extension block is provided with a sliding adjustment groove, and a position opposite to the sliding adjustment groove in the extension side block is provided with a limit strip matched with the sliding adjustment groove.
In a preferred embodiment, a first fixing screw is screwed to the outside of the extension side block through a threaded hole formed therein, and the first fixing screw penetrates through the extension side block and abuts against the inside of the slide adjustment groove.
In a preferred embodiment, the two sides of the inner wall of the mounting block are slidably connected with transverse partition plates, the lower surfaces of the transverse partition plates are connected with the top ends of the sliding blocks, insulating fillers are filled between the upper surfaces of the transverse partition plates and the inner wall of the top of the mounting block, and rubber buffer particles are filled between the lower surfaces of the transverse partition plates and the inside of the mounting block.
In a preferred embodiment, the top of the mounting block is inserted with a screwing head, and the screwing head is in threaded connection with the lower surface of the sliding groove.
In a preferred embodiment, the circuit board body comprises a wear-resistant outer surface layer, a PC base layer is arranged on the lower side surface of the wear-resistant outer surface layer, a flame-retardant layer is arranged on one side surface of the PC base layer away from the wear-resistant outer surface layer, and an insulating bottom layer is arranged on one side surface of the flame-retardant layer away from the PC base layer.
In a preferred embodiment, the thickness of the wear-resistant outer skin is 0.12mm, and the wear-resistant outer skin is a TPU epoxy resin layer.
In a preferred embodiment, the thickness of the PC base layer is 0.10 mm.
In a preferred embodiment, the thickness of the flame-retardant layer is 0.20mm, and the flame-retardant layer is a flame-retardant silica gel particle layer.
In a preferred embodiment, the thickness of the insulating bottom layer is 0.08mm, and the insulating bottom layer is a ceramic fiber material layer.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. when the circuit board body is installed, the sliding block can be adjusted according to the installation position, and the sliding block can move in the sliding groove by screwing the screwing head, so that the position of the adjusting cross rod can be adjusted.
2. According to the invention, the extending side blocks and the resistance adhesive tape are arranged on two sides of the circuit board body, when the installation position of the circuit board body is wider, the distance length of the resistance adhesive tape in the extending side blocks can be adjusted, the extending blocks can be pulled in the extending side blocks after the fixing screw rods are screwed during adjustment, the fixing screw rods can be screwed after the proper position is adjusted, and then the length of the resistance adhesive tape is matched with the installation position, so that the convenience in use is improved.
3. According to the invention, the circuit board body and the other circuit board body are fixed through the lamination base, the sliding rod is arranged in the lamination base, the distance of the sliding rod can be adjusted, so that the lamination base can be suitable for different installation requirements, and meanwhile, the insulation filler is arranged in the installation block, so that the connection between the circuit board body and the circuit board body is not interfered, and the stability in use is improved.
Drawings
FIG. 1 is a schematic diagram of a circuit board body structure according to the present invention;
FIG. 2 is a schematic diagram of a plurality of circuit board bodies according to the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 1 according to the present invention;
FIG. 4 is a schematic view of a base structure of a stack of plates according to the present invention;
FIG. 5 is a schematic view of the internal structure of the mounting block of the present invention;
FIG. 6 is a schematic view of a layered structure of a circuit board body according to the present invention.
The labels in the figure are: 1-circuit board body, 2-installation through hole, 3-extension side block, 4-fixed screw rod I, 5-sliding adjusting groove, 6-extension block, 7-resistance adhesive tape, 8-holding handle, 9-adjusting cross bar, 10-laminated base, 11-bottom pad, 12-sliding block, 13-installation block, 14-screwing head, 15-sliding groove, 16-fixed screw rod II, 17-insulating filler, 18-transverse clapboard, 19-rubber buffer particle, 20-wear-resistant outer surface layer, 21-PC base layer, 22-flame retardant layer, 23-insulating bottom layer and 24-sliding bar.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
With reference to figures 1-6 of the drawings,
a laminated plate structure of a multilayer printed board comprises a circuit board body 1, wherein a mounting through hole 2 is formed in the surface of the circuit board body 1, a sliding groove 15 is formed in the center of the circuit board body 1, a sliding block 12 is connected inside the sliding groove 15 in a sliding mode, a mounting block 13 is fixedly connected above the sliding block 12, an adjusting cross rod 9 is fixed on the surface of one side of the mounting block 13, and two ends of the adjusting cross rod 9 are fixedly connected with a holding handle 8;
the surface of the two sides of the circuit board body 1 is fixedly connected with extension side blocks 3, extension blocks 6 are movably arranged in the extension side blocks 3, and resistance adhesive tapes 7 are bonded at the tail ends of the outer sides of the extension blocks 6;
four corners of the upper surface of circuit board body 1 are fixed with four heelpieces 11, the last fixed surface of heelpiece 11 is connected with folded plate base 10, the inside activity of folded plate base 10 is provided with slide bar 24, 11 and another circuit board body 1 fixed connection of heelpiece are passed through at the top of slide bar 24, threaded hole is seted up on the surface of slide bar 24, folded plate base 10 is connected with two 16 fixing screw, two 16 fixing screw run through the inside of folded plate base 10 threaded connection in the screw hole.
The outside edge of extending piece 6 has seted up sliding adjustment groove 5, and the inside of extending side piece 3 is provided with the spacing strip with 5 looks adaptations of sliding adjustment groove with sliding adjustment groove 5 department relatively.
The outside of the extension side block 3 is connected with a first fixing screw rod 4 through a threaded hole formed in the screw hole, and the first fixing screw rod 4 penetrates through the extension side block 3 and abuts against the inside of the sliding adjusting groove 5.
The two sides of the inner wall of the mounting block 13 are slidably connected with transverse partition plates 18, the lower surfaces of the transverse partition plates 18 are connected with the top ends of the sliding blocks 12, insulating fillers 17 are filled between the upper surfaces of the transverse partition plates 18 and the inner wall of the top of the mounting block 13, and rubber buffer particles 19 are filled between the lower surfaces of the transverse partition plates 18 and the inside of the mounting block 13.
The top of the mounting block 13 is inserted with a screwing head 14, and the screwing head 14 is in threaded connection with the lower surface of the sliding groove 15.
The circuit board body 1 comprises an abrasion-resistant outer surface layer 20, a PC base layer 21 is arranged on the lower side surface of the abrasion-resistant outer surface layer 20, a flame-retardant layer 22 is arranged on one side surface, away from the abrasion-resistant outer surface layer 20, of the PC base layer 21, and an insulation bottom layer 23 is arranged on one side surface, away from the PC base layer 21, of the flame-retardant layer 22.
When installing circuit board body 1, can carry out the adjustment of sliding block 12 according to the mounted position earlier this moment, revolve twisting head 14 through the commentaries on classics of twisting and can make sliding block 12 remove in sliding tray 15's inside to the realization is to the adjustment of adjusting horizontal pole 9 position, and after adjusting, can hold and hold grip 8 and just can install it, has improved the convenience when using.
The circuit board body 1 both sides are provided with extension side piece 3 and resistance adhesive tape 7, when the position broad of circuit board body 1 installation, can make resistance adhesive tape 7 can adjust at the inside distance length of extension side piece 3 this moment, twist soon during the adjustment behind the fixing screw 4, can extend the inside of side piece 3 and carry out the pull to extension piece 6, after adjusting suitable position, can twist fastening screw 4 soon, later the length and the mounted position looks adaptation of resistance adhesive tape 7, thereby convenience when having improved the use.
The circuit board body 1 is fixed with another circuit board body 1 through the laminated base 10, the sliding rod 24 is arranged inside the laminated base 10, the distance of the sliding rod 24 can be adjusted, the laminated base 10 can be suitable for different installation requirements, the insulating filler 17 is arranged inside the installation block 13, the connection between the circuit board body 1 and the circuit board body 1 cannot be interfered, and the stability in use is improved.
The thickness of the wear-resistant outer surface layer 20 is 0.12mm, and the wear-resistant outer surface layer 20 is a TPU epoxy resin layer
The thickness of the PC base layer 21 is 0.10mm, and the PC base layer 21 is a composite material layer of resin, fiber cloth, a glass fiber mat and an externally-coated copper foil.
The thickness of the flame retardant layer 22 is 0.20mm, and the flame retardant layer 22 is a flame retardant silica gel particle layer.
The thickness of the insulating bottom layer 23 is 0.08mm, and the insulating bottom layer 23 is a ceramic fiber material layer.
The working principle is as follows: when installing circuit board body 1, can carry out the adjustment of sliding block 12 according to the mounted position earlier this moment, revolve to twist first 14 through revolving to twist and can make sliding block 12 remove in the inside of sliding tray 15 to the realization is to the adjustment of adjusting horizontal pole 9 position, and after adjusting, can hold and hold handle 8 and just can install it, has improved the convenience when using. The circuit board body 1 both sides are provided with extension side piece 3 and resistance adhesive tape 7, when the position broad of circuit board body 1 installation, can make resistance adhesive tape 7 can adjust at the inside distance length of extension side piece 3 this moment, twist soon during the adjustment behind the fixing screw 4, can extend the inside of side piece 3 and carry out the pull to extension piece 6, after adjusting suitable position, can twist fastening screw 4 soon, later the length and the mounted position looks adaptation of resistance adhesive tape 7, thereby convenience when having improved the use. The circuit board body 1 is fixed with another circuit board body 1 through the laminated base 10, the sliding rod 24 is arranged inside the laminated base 10, the distance of the sliding rod 24 can be adjusted, the laminated base 10 can be suitable for different installation requirements, the insulating filler 17 is arranged inside the installation block 13, the connection between the circuit board body 1 and the circuit board body 1 cannot be interfered, and the stability in use is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a pressfitting folded plate structure of multilayer printed board, includes circuit board body (1), its characterized in that: the surface of the circuit board body (1) is provided with a mounting through hole (2), the center of the circuit board body (1) is provided with a sliding groove (15), the inside of the sliding groove (15) is connected with a sliding block (12) in a sliding manner, a mounting block (13) is fixedly connected above the sliding block (12), the surface of one side of the mounting block (13) is fixedly provided with an adjusting cross rod (9), and two ends of the adjusting cross rod (9) are fixedly connected with holding handles (8);
the surface of the two sides of the circuit board body (1) is fixedly connected with extension side blocks (3), extension blocks (6) are movably arranged in the extension side blocks (3), and resistance adhesive tapes (7) are bonded at the tail ends of the outer sides of the extension blocks (6);
four corners of the upper surface of circuit board body (1) are fixed with four heels (11), the last fixed surface of heels (11) is connected with folded plate base (10), the inside activity of folded plate base (10) is provided with slide bar (24), the top of slide bar (24) is through heels (11) and another circuit board body (1) fixed connection, the screw hole is seted up on the surface of slide bar (24), folded plate base (10) are connected with clamping screw two (16), clamping screw two (16) run through folded plate base (10) threaded connection in the inside of screw hole.
2. The laminated board structure of a multilayer printed board as claimed in claim 1, wherein: the edge of the outer side of the extension block (6) is provided with a sliding adjusting groove (5), and a limiting strip matched with the sliding adjusting groove (5) is arranged at the position, opposite to the sliding adjusting groove (5), in the extension side block (3).
3. The laminated board structure of a multilayer printed board as claimed in claim 1, wherein: the outer portion of the extension side block (3) is connected with a first fixing screw rod (4) through a threaded hole formed in the thread, and the first fixing screw rod (4) penetrates through the extension side block (3) and abuts against the inner portion of the sliding adjusting groove (5).
4. The laminated board structure of a multilayer printed board as claimed in claim 1, wherein: the sliding block is characterized in that transverse partition plates (18) are connected to two sides of the inner wall of the mounting block (13) in a sliding mode, the lower surfaces of the transverse partition plates (18) are connected with the top ends of the sliding blocks (12), insulating fillers (17) are filled between the upper surfaces of the transverse partition plates (18) and the inner wall of the top of the mounting block (13), and rubber buffer particles (19) are filled between the lower surfaces of the transverse partition plates (18) and the inside of the mounting block (13).
5. The laminated board structure of a multilayer printed board as claimed in claim 1, wherein: the top of the sliding block (12) is inserted with a screwing head (14), and the screwing head (14) is in threaded connection with the lower surface of the sliding groove (15).
6. The laminated board structure of a multilayer printed board as claimed in claim 1, wherein: the circuit board body (1) comprises a wear-resistant outer surface layer (20), a PC base layer (21) is arranged on the lower side surface of the wear-resistant outer surface layer (20), a flame-retardant layer (22) is arranged on one side surface, away from the wear-resistant outer surface layer (20), of the PC base layer (21), and an insulating bottom layer (23) is arranged on one side surface, away from the PC base layer (21), of the flame-retardant layer (22).
7. The laminated board structure of a multilayer printed board as claimed in claim 6, wherein: the thickness of the wear-resistant outer surface layer (20) is 0.12mm, and the wear-resistant outer surface layer (20) is a TPU epoxy resin layer.
8. The laminated board structure of a multilayer printed board as claimed in claim 7, wherein: the thickness of the PC base layer (21) is 0.10 mm.
9. The laminated board structure of a multilayer printed board as claimed in claim 8, wherein: the thickness of fire-retardant layer (22) is 0.20mm, fire-retardant layer (22) is fire-retardant silica gel particle layer.
10. The laminated board structure of a multilayer printed board as claimed in claim 9, wherein: the thickness of insulating bottom layer (23) is 0.08mm, insulating bottom layer (23) are ceramic fiber material layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202210331660.2A CN114679855A (en) | 2022-03-30 | 2022-03-30 | Pressfitting of multilayer printing board folds board structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202210331660.2A CN114679855A (en) | 2022-03-30 | 2022-03-30 | Pressfitting of multilayer printing board folds board structure |
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CN114679855A true CN114679855A (en) | 2022-06-28 |
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CN202210331660.2A Pending CN114679855A (en) | 2022-03-30 | 2022-03-30 | Pressfitting of multilayer printing board folds board structure |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09246685A (en) * | 1996-03-07 | 1997-09-19 | Fujitsu I Network Syst Ltd | Printed circuit board linkage system |
JPH10270872A (en) * | 1997-03-24 | 1998-10-09 | Japan Drive-It Co Ltd | Printed circuit board support structure and its support body |
US20050174748A1 (en) * | 2004-01-14 | 2005-08-11 | Denso Corporation | Electronic control device |
US20170094792A1 (en) * | 2015-09-28 | 2017-03-30 | TBS Avionics Co. Ltd. | Electronic Component |
US20200113052A1 (en) * | 2018-10-04 | 2020-04-09 | Chicony Electronics Co., Ltd. | Multi-layer circuit board structure |
CN212436019U (en) * | 2020-07-04 | 2021-01-29 | 田讯电子(烟台)有限公司 | Close amalgamation circuit board |
CN212573082U (en) * | 2020-06-28 | 2021-02-19 | 深圳市博诚鑫电子有限公司 | Printed circuit board convenient to stretch out and draw back |
CN212910197U (en) * | 2020-10-09 | 2021-04-06 | 深圳市九和咏精密电路有限公司 | Circuit board with fixed knot constructs |
-
2022
- 2022-03-30 CN CN202210331660.2A patent/CN114679855A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09246685A (en) * | 1996-03-07 | 1997-09-19 | Fujitsu I Network Syst Ltd | Printed circuit board linkage system |
JPH10270872A (en) * | 1997-03-24 | 1998-10-09 | Japan Drive-It Co Ltd | Printed circuit board support structure and its support body |
US20050174748A1 (en) * | 2004-01-14 | 2005-08-11 | Denso Corporation | Electronic control device |
US20170094792A1 (en) * | 2015-09-28 | 2017-03-30 | TBS Avionics Co. Ltd. | Electronic Component |
US20200113052A1 (en) * | 2018-10-04 | 2020-04-09 | Chicony Electronics Co., Ltd. | Multi-layer circuit board structure |
CN212573082U (en) * | 2020-06-28 | 2021-02-19 | 深圳市博诚鑫电子有限公司 | Printed circuit board convenient to stretch out and draw back |
CN212436019U (en) * | 2020-07-04 | 2021-01-29 | 田讯电子(烟台)有限公司 | Close amalgamation circuit board |
CN212910197U (en) * | 2020-10-09 | 2021-04-06 | 深圳市九和咏精密电路有限公司 | Circuit board with fixed knot constructs |
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Application publication date: 20220628 |