Transcript
Xiaomi Air 12 Notebook June 5th, 2017 Xiaoming Chen
PennEngineering®
www.pemnet.com
1
© 2017
Overview
Xiaomi Air 12 Notebook has ultra-thin, full-metal design, edge to edge glass coverage, a sleek appearance, lite up keyboard, and ultra-light weight design featuring the latest hardware. The Notebook is extremely portable and can be carried around effortlessly making it a perfect laptop to carry.
www.pemnet.com
2
© 2017
Details & Findings Pictures and Description of the Xiaomi Air 12 Notebook and the Disassembly Process.
www.pemnet.com
3
© 2017
Xiaomi Air 12 Notebook Teardown Step 1: Power off Xiaomi Air 12 notebook.
www.pemnet.com
4
© 2017
Xiaomi Air 12 Notebook Teardown Step 2: Removing bottom case Xiaomi Air 12 Notebook uses eight M2x3.3 (circled in Pink), CD finish with shoulder screws to secure the bottom case. In the middle of the bottom case on the right side, one screw is under the a rubber foot. We pry the bottom case with a pick or plastic card and then slide the pick by the edges until removing the bottom case completely.
The screw details are as below • M2 x 3.3 mm overall length • 3.65 mm head diameter • 0.3 mm head thickness • 2.3 mm shoulder diameter • 0.4 mm shoulder length • Nylon locking patch • #4 Phillips drive • CD finish • Flat head • 400 series S/S
www.pemnet.com
5
© 2017
Xiaomi Air 12 Notebook Teardown Step 2: Removing bottom case The below pictures show the CD finish, shoulder screw geometry.
www.pemnet.com
6
© 2017
Xiaomi Air 12 Notebook Teardown Step 2: Removing bottom case The below picture and schematic diagram illustrate joining structure for the molded-in brass inserts.
www.pemnet.com
7
© 2017
Xiaomi Air 12 Notebook Teardown Step 3: Separating speaker modules We disconnect the flex cable before removing the two speaker modules. Total four molded plastic tapered pins position the two speaker modules, two pins for each speaker module. In this step, no mechanical fasteners, adhesive involved in the joining.
www.pemnet.com
8
© 2017
Xiaomi Air 12 Notebook Teardown Step 4: Removing battery Total four black oxided M1.8 screws used to hold the battery secure. The M1.8 screws (circled in Pink) on the left side go through the holes and then through the threads in the brass inserts illustrated on slide #11. The M1.8 screws circled in Red in the middle go through the holes in a stainless steel made battery cover and then through the threads of the standoffs illustrated in slide #12.
The screw details are as below • M1.8 x 2.75 mm overall length • 4.3 mm head diameter • 0.51 mm head thickness • Nylon locking patch • #0 Phillips drive • Flat head • Carbon Steel + Black Oxided
www.pemnet.com
9
© 2017
Xiaomi Air 12 Notebook Teardown Step 4: Removing battery Two flat head M1.4 screws with plastic washers are used to hold the battery. The screws (circled in Blue) attach on the standoffs illustrated on slide #13.
The screw details are as below • M1.4 x 1.9 mm overall length • 5.0 mm head diameter • 0.48 mm head thickness • Nylon locking patch • #0 Phillips drive • Flat head • Carbon Steel + Bright Nickel
www.pemnet.com
The washer details are as below • O.D.: 4.85mm • I.D.: 2.40mm • Thickness: 0.8mm • Plastic
10
© 2017
Xiaomi Air 12 Notebook Teardown Step 4: Removing battery The below pictures illustrate joining structure for the two black oxided M1.8 screws used.
Black oxided screws on the left side
www.pemnet.com
11
© 2017
Xiaomi Air 12 Notebook Teardown Step 4: Removing keyboard cover The following designs represent the joining structure for the two black oxided M1.8 screws used. The standoff illustrated below is made of carbon steel with Bright Nickel plating.
www.pemnet.com
12
© 2017
Xiaomi Air 12 Notebook Teardown Step 4: Removing keyboard cover The below pictures represent joining structure for the two flat head M1.4 screws with plastic washers. The standoff illustrated below is made of carbon steel with Bright Nickel plating.
www.pemnet.com
13
© 2017
Xiaomi Air 12 Notebook Teardown Step 5: Removing battery cover The battery cover stamped with 0.2mm stainless steel panel and secured by eight snap fits with large clearance between the male and female snapping elements. In this step, no mechanical fasteners were used.
www.pemnet.com
14
© 2017
Xiaomi Air 12 Notebook Teardown Step 6: Removing hard disc drive One M1.4 flat head screw secures the hard drive on the aluminum alloy chassis with the threads inside the standoff (circled in Pink) illustrated below.
The screw details are as below • M1.4 x 1.95 mm overall length • 5.1 mm head diameter • 0.45 mm head thickness • Nylon locking patch • Machined • #0 Phillips drive • Flat head • Carbon Steel + Bright Nickel
www.pemnet.com
15
© 2017
Xiaomi Air 12 Notebook Teardown Step 6: Removing hard disc drive The following picture and schematic diagram illustrates joining structure for the flat head M1.4 screw used. The standoff illustrated below is made of carbon steel with Bright Nickel plating.
www.pemnet.com
16
© 2017
Xiaomi Air 12 Notebook Teardown Step 7: Removing the motherboard Total eight flat head M1.8 screws (circled in Pink) are used to secure the motherboard. Six of the screws go through the holes in the circuit board and then attach on the brass inserts illustrated on slide #18. The remaining screws (in the middle) go through the circuit board and then attach on the standoffs clinched into sheet metal beneath aluminum chassis as shown on slide #19.
The screw details are as below • M1.8 x 2.7 mm overall length • 4.3 mm head diameter • 0.5 mm head thickness • Nylon locking patch • Machined • #0 Phillips drive • Flat head • Carbon Steel + Black Oixded
www.pemnet.com
17
© 2017
Xiaomi Air 12 Notebook Teardown Step 7: Removing the motherboard The following pictures and schematic diagrams illustrate joining structures for the flat head M1.8 screw used. The insert illustrated below is made of brass with Silver coating.
6x Black oxided screws around the side
www.pemnet.com
18
© 2017
Xiaomi Air 12 Notebook Teardown Step 7: Removing motherboard The following pictures and schematic diagrams illustrate joining structures for the flat head M1.8 screw used. The standoff illustrated below is made of carbon steel with Bright Nickel plating.
2x Black oxided screws in the middle www.pemnet.com
19
© 2017
Xiaomi Air 12 Notebook Teardown Step 8: Removing touchpad Three M1.8 flat head screws are used in the touchpad secure. The screws go through the holes itself and then into the threads inside the molded-in brass inserts illustrated on slide #21.
The screw details are as below • M1.8 x 2.65 mm overall length • 4.4 mm head diameter • 0.5 mm head thickness • Nylon locking patch • Machined • #0 Phillips drive • Flat head • Carbon Steel + Black Oixded
www.pemnet.com
20
© 2017
Xiaomi Air 12 Notebook Teardown Step 8: Removing touchpad The following picture and schematic diagrams illustrate joining structures for the flat head M1.8 screw used. The insert illustrated below is made of brass with Silver coating.
www.pemnet.com
21
© 2017
Xiaomi Air 12 Notebook Teardown Step 9: Removing Audio Jack input/output Two flat head M1.8 screws (circled in Pink) are used to hold the audio jack. The screws hold the circuit board and on to the molded-in brass inserts illustrated on slide #23.
The screw details are as below • M1.8 x 2.65 mm overall length • 4.4 mm head diameter • 0.49 mm head thickness • Nylon locking patch • Machined • #0 Phillips drive • Flat head • Carbon Steel + Black Oixded
www.pemnet.com
22
© 2017
Xiaomi Air 12 Notebook Teardown Step 9: Removing Audio Jack input/output The following picture and schematic diagram illustrate the two flat head M1.8 screws that mate with the machined molded-in brass insert. The insert illustrated below is made of brass with Silver coating.
www.pemnet.com
23
© 2017
Xiaomi Air 12 Notebook Teardown Step 10: Removing the Keyboard Total thirty-eight flat head M1 screws (circled in Pink) are used to hold the keyboard with self clinching micro standoffs illustrated on slide #27.
The screw details are as below • M1 x 1.4 mm overall length • 2.3 mm head diameter • 0.3 mm head thickness • Nylon locking patch • Machined • #00 Phillips drive • Flat head • Carbon Steel + Bright Nickel
www.pemnet.com
24
© 2017
Xiaomi Air 12 Notebook Teardown Step 10: Removing the Keyboard For positioning the keyboard in the right place, two guide pins (circled in Pink) are used in the keyboard componen. The guide pin is made of carbon steel with Bright Nickel plating.
www.pemnet.com
25
© 2017
Xiaomi Air 12 Notebook Teardown Step 10: Removing the keyboard component The following drawing illustrates the guide pin outside dimensions. The guide pin illustrated below is made of carbon steel with Bright Nickel plating.
www.pemnet.com
26
© 2017
Xiaomi Air 12 Notebook Teardown Step 10: Removing the keyboard component The following picture and schematic diagram illustrates the two flat head M1.8 screws that the external threads engage in the threads that are machined inside of the micro standoffs.
www.pemnet.com
27
© 2017
Xiaomi Air 12 Notebook Teardown Step 10: Removing the keyboard component The keyboard component consists of 78 pieces of typing keys, 0.2mm stainless steel made of sheet metal panel and nonmetal film made of insulating layer at the bottom. The joints between the 0.2mm keys and the metal panel, the metal panel and insulating layer are snap fits and adhesion bond. In this step, no mechanical fasteners were found.
www.pemnet.com
28
© 2017
Xiaomi Air 12 Notebook Teardown Step 11: Removing the hinge The two hinges are secured to the aluminum alloy chassis by six M1.8 screws fastening into the threads inside of the molded-in micro inserts illustrated on slide #30.
The screw details are as below • M1.8 x 4.6 mm overall length • 3.6 mm head diameter • 0.75 mm head thickness • Nylon locking patch • Machined • #1 Phillips drive • Flat head • Carbon Steel + Bright Nickel
www.pemnet.com
29
© 2017
Xiaomi Air 12 Notebook Teardown Step 11: Removing the hinge The following picture and schematic diagram illustrates the six flat head M1.8 screws that the external threads engage in the threads that are machined inside of the molded-in inserts. The insert illustrated below is made of brass with Silver coating. The plastic frame is also covered with Silver coating.
www.pemnet.com
30
© 2017
Xiaomi Air 12 Notebook Teardown Step 12: Removing the metal-spring-contact and liquid crystal displayer (LCD). The metal-spring-contact fastened by five flat head M1.4x2.3 screws (circled in Blue) used in the threads inside SMT soldered on the motherboard illustrated below and on slide #32. The LCD assembly can easily be detached with using a pick and a hair drier. The displayer is fastened with double-sided adhesive tapes. In this sub-step, no any mechanical fastener found.
The screw details are as below • M1.4 x 2.3 mm overall length • 2.8 mm head diameter • 0.5 mm head thickness • Nylon locking patch • Machined • #00 Phillips drive • Flat head • Carbon Steel + Black Oixded
www.pemnet.com
31
© 2017
Xiaomi Air 12 Notebook Teardown Step 12: Removing the metal-spring-contact and liquid crystal displayer (LCD). The following picture and schematic diagram illustrates the five flat head M1.4 screws that engage in the threads that are machined inside the SMT micro nuts.
www.pemnet.com
32
© 2017
Xiaomi Air 12 Notebook Teardown In the below picture lay all the components that we disassembled from the teardown:
www.pemnet.com
33
© 2017
Xiaomi Air 12 Notebook Teardown The following pictures illustrate the fasteners installed into the aluminum chassis on slides #12, #13, #16, #19, #21, #25 and #27.
Front side of the aluminum chassis
Back side of the aluminum chassis www.pemnet.com
34
© 2017
Fastener Summary
www.pemnet.com
35
© 2017
Fasteners Summary Total of 169 fasteners used in this laptop, give the notebook rigidity and make the notebook easy to disassemble. All of the fasteners in the device are listed in the table below: Item
Thread
Overall Length Head Dia.
Head Thick.
Driver
Finish
Nylock
Qty.
Slide No
1
M2 Screw
3.3
3.65
0.3
Phillips #4
CD Finish
Yes
8
#5; #6
2
M1.8 Screw
2.75
4.3
0.51
Phillips #0
Black Oxided
Yes
4
#9
3
M1.4 Screw
1.9
5
0.48
Phillips #0
Black Oxided
Yes
2
#10
4
M1.4 Screw
1.95
5.1
0.45
Phillips #0
Bright Nickel
Yes
1
#15
5
M1.8 Screw
2.7
4.3
0.5
Phillips #0
Black Oxided
Yes
8
#17
6
M1.8 Screw
2.65
4.4
0.5
Phillips #0
Black Oxided
Yes
5
#20, #22
7
M1 Screw
1.4
2.3
0.3
Phillips #00 Bright Nickel
Yes
38
#24
8
M1.8 Screw
4.6
3.6
0.75
Phillips #1
Bright Nickel
Yes
6
#29
9
M1.4 Screw
2.3
2.8
0.5
Phillips #00 Black Oxided
Yes
5
#31
10
M1.4 SMT Micro Nut
1.6
/
/
/
/
5
#32
11
M1.8 Micro Molded-in Nut
2.75
/
/
/
/
/
6
#30
12
M1.8 Micro Molded-in Nut
2.25
/
/
/
/
/
21
#11,#18,#21,#23
13
M2 Micro Molded-in Nut
2.25
/
/
/
/
/
8
#7
14
M1.0 Micro Standoff
1.6
/
/
/
Bright Nickel
/
38
#27
15
M1.4 Micro Standoff
2.88
/
/
/
Bright Nickel
/
3
#13,#16
16
M1.8 Micro Standoff
2.3
/
/
/
Bright Nickel
/
4
#12,#19
17
M1.8 Micro Standoff
2.3
/
/
/
Bright Nickel
/
3
#13,#16
18
φ1.90 X 3.4 Guide Pin
3.4
/
/
/
Bright Nickel
/
2
#25, #26
19
φ4.85/φ2.4 X 0.8 Plastic Washer
0.8
/
/
/
2
#10
www.pemnet.com
Tin-Plated
/
/
36
© 2017
Fasteners Summary All fasteners found in the device are categorized in the following 8 groups: • M1, M1.4, M1.8, M2 • Nylon locking patch • Phillips drive • Flat head • Carbon steel + Finish • Quantity: 77 • Reference slide #5, #6 , #9 #10 , #15 , #17 , #20 #22, #24, #29, #31
• M1.8, M2 • 2.25 mm overall length • Thread class: 6H • Quantity: 29 • Reference slide #7, #11, #18, #21, #23
www.pemnet.com
• M1.4 • 1.6 mm overall length • Thread class: 6H • Quantity: 5 • Reference slide #31
• φ1.90 • Thread class: N/A • Quantity: 2 • Reference slide #25, #26
37
© 2017
Fasteners Summary • M1 • 1.4 mm overall length • Thread class: 6H • Quantity: 38 • Reference slide #24
• 0.8 mm overall length • O.D. : 4.85 mm • O.D. : 2.4 mm • Thread class: N/A • Quantity: 2 • Reference slide #10
• M1.8 • 2.75 mm overall length • Thread class: 6H • Quantity: 6 • Reference slide #30
www.pemnet.com
• M1.8 • 2.3 mm overall length • Thread class: 6H • Quantity: 7 • Reference slide #12, #13, #16, #19
38
© 2017
Alternate Solutions PennEngineering® recommendations of alternate hardware and cost savings opportunities.
www.pemnet.com
39
© 2017
Alternate Solutions PennEngineering® is fully capable of making all of the fasteners shown on slides #36, #37, #38. In addition to direct replacement and perhaps some manufacturing and material substitution for functional and cost improvement, some alternate fastening suggestions are presented for specific situations in the following slides.
www.pemnet.com
© 2017
Alternate Solutions • Micro screws alternative solution:
As an alternative approach, all of the micro screws can be replaced by PennEngineering® manufactured micro screws. PEM has license with Microstix®, Torx® and Torx Plus® driver and self-tapping thread patent as like TAPTITE®, FASTITE®, REMFORM® and REMFORM F® with different design solutions.
www.pemnet.com
41
© 2017
Alternate Solutions • M1 Screw alternative solution I:
The M1 screws are used to fix & connect the keyboard with the main aluminum chassis body. All of the M1 screws can be replaced with PennEngineering® TKA™/TK4™ microPEM® TackSert® Pins can be used in this case to replace the joints. Installation will be more fast by press-in to replace turn-in. The parts however is supposed to use in applications where disassembly is not required.
www.pemnet.com
42
© 2017
Alternate Solutions • M1 Screw alternative solution II: The M1 screws are used to fix & connect the keyboard with the main aluminum chassis body. All of the M1 screws can be replaced with PennEngineering® TA™/T4™ microPEM® TackPin® Fasteners. The solution enables sheet-to-sheet attachment, replacing costly screw installation in applications where disassembly is not required.
www.pemnet.com
43
© 2017
Alternate Solutions • M1 Screw alternative solution III: The M1 screws are used to fix & connect the keyboard with the main aluminum chassis body. All of the M1 screws can be replaced with PennEngineering® TS4™ microPEM® TackScrew™ Fasteners. The microPEM® TS4™ enables cost effective sheet-to-sheet attachment by simply pressing into place and can be removed by simply unscrewing, similar to original threaded fasteners.
www.pemnet.com
44
© 2017
Alternate Solutions • PEM micro Clip™ fasteners (patent pending): PennEngineering® micro Clip™ fasteners can be used to assemble multiple layers together such as flexible PCB with stainless steel upper panel, both to the Al-Mg substrate, bringing the fastener head profile to a minimum of 0.15 mm vs. 0.6 mm head height of current screws used, while retaining the clamp load.
www.pemnet.com
45
© 2017
Alternate Solutions • Micro Molded-in Inserts alternative solution: MicroPEM® thru-threaded brass inserts for plastics introduce ideal fastener solutions to attach components in compact electronic assemblies. The Micro Molded-in Nut can be replaced by Type MSIB™ microPEM® Brass Inserts from PennEngineering® . The parts provide reusable metal threads to attach plastics securely in compact electronic assemblies. The inserts install permanently where designed into ABS, polycarbonate, and other plastic substrates by pressing them into the host material using ultrasonic equipment or thermal press. The new MSIA series of Aluminum alloy with different sizes and types offer light weight, lead-free alternative.
www.pemnet.com
46
© 2017
Alternate Solutions • Micro Standoff alternative solution: The Micro Standoffs can be replaced by PEM® Type MSO4™ microPEM® Standoffs. The parts enable components to be mounted and/or spaced in compact electronic assemblies, especially suiting applications where space may be extremely limited for attachment hardware. PennEngineering® can also offer MSO4s with different sizes and types to meet the application requirement.
www.pemnet.com
47
© 2017
Alternate Solutions • M1.4 SMT Micro Nut alternative solution: The M1.4 SMT micro nut can be replaced by PEM® micro-SMTSO surface mount fasteners. With micro-SMTSOs from PennEngineering® customer can benefit from all the advantages of SMT technology even with the smallest components. Made of tin-plated steel, SMTSO can be soldered together with other components using the reflow process. The miniature nuts are available in thread sizes M1 to M1.6 and in lengths from 1 to 3 mm.
www.pemnet.com
48
© 2017
Alternate Solutions • Φ1.90 X 3.4 Guide Pin alternative solution: The Φ1.90 X 3.4 Guide Pin can be replaced by MPP™ microPEM® Self-clinching Pins. Ideal for micro positioning and alignment applications, the Self-clinching Pins from PennEngineering® can provide the MPPs with different sizes and types to meet the application requirement.
www.pemnet.com
49
© 2017
Alternate Solutions • Glued plastic-aluminum component alternative solution I: On slide #7 the brass insert in the plastic boss by means of ultrasonic welding or heat staking and the heat insertion is glued into the aluminum chassis. The below annular Snap Joints can be used to replace the original design in order to improve efficiency and reduce cost.
Inseparable Design
Separable Design
www.pemnet.com
50
© 2017
Alternate Solutions • Glued plastic-aluminum component alternative solution II: In same way, some positioning pins clinched into the aluminum chassis along with the edges work as male snap fit elements (refer to Refer to YCHA-57222 Design on slide #53). In this way the joints can be used to replace the original design for improving efficiency and reducing cost.
Separable Design
Inseparable Design
www.pemnet.com
51
© 2017
Conclusions and Summary The Xiaomi Air 12 Notebook includes a total 169 fasteners throughout the device assembly. The device was quite easy to disassemble despite the large number of fasteners and components. PennEngineering® is fully capable of making all of the fasteners shown on slides in this teardown report. PennEngineering® can produce all of the fastening solutions used in this notebook within our current manufacturing facilities. In addition to direct replacement and perhaps some manufacturing and material substitution for functional and cost improvement, some alternate fastening suggestions are presented for specific situations. Significant cost savings can be achieved by replacing 38 pierces of M1 screws illustrated on the slides #24, #37 to TS4™ microPEM® TackScrew™ Fasteners (refer to slide #44), TA™/T4™ microPEM® TackPin® Fasteners (refer to slide #43) and TKA™/TK4™ microPEM® TackSert® Pins (refer to slide #42). With TS4™ or TA™/T4™ or TKA™/TK4™ introduced into the keyboard joining, the carbon steel made keyboard chassis (slides #24, #27, #38) can be removed. At the same time the 38 pierces of M1 micro standoffs (refer to slide #27, #38) installed into the chassis can be removed as well. Both parts replacement would result in substantial cost saving opportunities. As far as it concerns the carbon steel chassis removal, the original guide pin and standoffs installed into it can be replaced by the solutions showed on slide #51 with some geometry and dimensions changed. Additional savings could be achieved by using microPEM® FASTENERS in this notebook.
www.pemnet.com
52
© 2017
Conclusions and Summary Guide pin
Standoff
Refer to YCHA-57222 Design
Refer to U-M2-1 Design
www.pemnet.com
53
© 2017
