BrydgeAir Keyboard for iPad Air - PennEngineering · BrydgeAir Keyboard for iPad Air With the back cover removed we have a total of thirteen screws appears. Step 3: Initially we remove

© 2016 www.pemnet.com 1

BrydgeAir Keyboard for iPad Air May 3rd. 2016

by XiaoMing Chen & Larry Zhang

PennEngineering®

http://www.pemnet.com/

© 2016 www.pemnet.com

BrydgeAir Keyboard for iPad Air Overview

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BrydgeAir Keyboard for iPad Air

Details & Findings

Pictures and Description of the


and the Disassembly Process.

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Step 1: Remove the four glued black Rubber Anti-Skid Pads from the back

cover(circled in Green). Four bright nickel plated screws (circled in Red) behind the

pads and two black nickel plated screws (circled in Blue) appear on this side.

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BrydgeAir Keyboard for iPad Air Step 2: To remove the back cover, the four bright nickel plated screws and the two black nickel plated

screws need to be removed. The first step is to remove the four bright nickel plated screws (circled in

Red).

The screws engaged into extruded threaded holes are illustrated in the next slide.

(Continued on slide #7)

Thread Size Quantity Driver Head Dia. OAL Material Plating

M2.5 x 4.0 4 Phillip 1# 3.9 4.80 Carbon Steel Bright Nickel

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The extruded threaded holes (circled in Green).

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BrydgeAir Keyboard for iPad Air (Continued)

Step 2: We then remove two black nickel plated screws (circled in Blue) that are tightened into

Aluminum alloy standoffs demonstrated on the slide #11 in Red.


M2.5 x 4.8 2 Phillip 0# 4.5 5.6 Carbon Steel Black Nickel

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BrydgeAir Keyboard for iPad Air With the back cover removed we have a total of thirteen screws appears.

Step 3: Initially we remove five bright nickel plated screws (circled in Red) . The bright nickel plated

screws engaged into the Aluminum alloy standoffs (Slide #11 in Red). (Continued on next slide)

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Thread

Size

Quantity Driver Head

Dia.

OAL Material Plating

M2.5 x 2.7 5 Phillip 0# 3.9 3.5 Carbon Steel Bright Nickel



BrydgeAir Keyboard for iPad Air (Continued)

Step 3: Then we remove eight black oxide treated screws (circled in Blue) . The black oxide screws are

engaged into internal threads depicted in slide #12 in Blue.

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M2.5 x 2.8 8 Phillip 1# 3.4 3.8 Carbon

Steel

Black Oxided




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Step 4: Keyboard Removal.

8X Rubber Spacer




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Step 5: Removing the keyboard leaves us with a total of seven standoffs and eight tapped

holes. The pictures below point out the standoffs. To be continued in the next slide for the

tapped holes.

• Thread: M2.5 • QTY: 7X • OAL: 5.1mm • Knurl Height: 0.85mm • Knurl Diameter: 5.0mm • Barrel Diameter: 4.5mm • Material: Aluminium




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(Continued) Step 5: Tapped holes: The threads integrated to the Aluminum keyboard frame.

• Thread: M2.5 • QTY: 8X • Material: Aluminum




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Step 6: Keyboard disassembly: The keyboard component consists of one keyboard, one insulating

sheet, one sheet metal and one magnetic spacer, four parts.

(Continued on next slid)

Magnetic spacer

Sheet Metal

Keyboard

(front view)

Insulating Sheet

Keyboard

(back view)




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(Continued)

Step 6: Keyboard disassembly: The magnetic spacer (circled in Red ) is used for positioning and

spacing purposes between the keyboard and the bottom piece. The intersectional contact surfaces

between the bottom of the keyboard and the top of the insulating sheet, the bottom of the

insulating sheet and the top of the sheet metal are glued together by using double sided adhesives.

Magnetic spacer

Keyboard Bottom Piece

One magnet build in the

component, works as a circuit

switch opening and closing

the Keyboard while activating

the power toggle on the iPad

without any other fastening

function.




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(Continued)

Step 6: Keyboard disassembly: On the insulating sheet and sheet metal we find a machined hole

for the both with same ordinate dimensions (circled in Blue). The two sheets align with each other

in the same direction by the magnetic spacer that positions and maintains space between the

keyboard component and the back cover. Adhesive tape of certain length and width is used for

holding the magnet onto the sheet metal. Refer to the drawing below for the joining approach.




Teardown is completed.

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Fastener Summary

Section Heading Slide – Do Not Remove



Fastener Summary

Detail Slide – Copy and use for details. Create a table of the fasteners found in the teardown.

Note thread sizes, lengths, drivers, etc. Multiple pages

can be used for different style fasteners

2 x

• Flat head

• M2.5 x 5.6 mm overall length

• 4.5 mm head diameter

• 0.8 mm head thickness

• 0# Phillips Recess

• ISO metric threads

• No locking patch used

• Black Nickel plating

• Reference slide # 7

8 x

• Countersunk head






• Nylon locking patch used

• Black Oxided


5 x

• Flat head







• Bright Nickel plating


4 x

• Flat head







• Bright Nickel plating




Fastener Summary

Detail Slide – Copy and use for details. Create a table of the fasteners found in the teardown.

Note thread sizes, lengths, drivers, etc. Multiple pages

can be used for different style fasteners

7 x

• Thread: M2.5

• 5.1mm overall length

• Knurl Height: 0.85mm

• Knurl Diameter: 5.0mm

• Barrel Diameter: 4.5mm

• Material: Aluminium


4 x

• Extruded Thread: M2.5

• Sheet thickness: 0.6mm

• Extruded Thread length: 1.6mm

• Extruded hole dia: 2.15mm

• Height: 0.85mm

• Barrel diameter: 2.85mm

• Material: Carbon steel


8 x

• Thread: M2.5

•Material: Aluminium




Alternate Solutions

PennEngineering® recommendations of alternate hardware and cost saving

opportunities.


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Alternate Solutions – I

PennEngineering can be able to provide

different sizes metric micro screws to

meet the application requirement. As a

alternate solution. PEM has

license with Torx®, Torx Plus®, and

Phillips® Drive System and has

capability to do both Zinc and Nickel

with different color.



Alternate Solutions – II

In this teardown, we notice two recess

dimensions in the same nominal threads.

To further simplify and consolidate the

existing fastening method, all of the

screws can be provided to the customer

in identical recess dimensions, This will

help decrease the manufacturing cost.




The M2.5 Aluminium made standoff can be replaced by PEM® engineered

CSS, CSA and FEOX series Concealed-Head Standoffs and PEM® Type

MSO4™ Self-clinching microPEM® Standoffs.

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Alternate Solutions – III




The M2.5 Aluminium made standoff can also be replaced by PEM® Type

MSO4™ Self-clinching microPEM® Standoffs with a special punch.

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Alternate Solutions – IV




PEM® TackScrew™ fasteners, PEM® TackSert™ pins and PEM® TackPin®

fasteners provide excellent solutions replacing regular screws with a decreased

installation cost. All three options are pressed into a hole axially and will not

loosen through vibration over time unlike a regular screw..

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PEM® TackScrew™ Fasteners: The base panel material should be metal. The panel can

be as hard as HRB 88 or less and as thin as 0.91mm. They can be removed in the same

way as a screw but only once; After the first removal they can be re-inserted just once

again. This allows for a one-time repair, rework or maintenance.

PEM® TackSert™ Pins: The base panel can be metal, die-cast or plastic. The parts are

not intended to be removed.

PEM® TackPin® Fasteners: The base panel has to be of metal material. The panel to be

clinched on can be as hard as HRB 88 or less and at least 0.89mm of thickness. They

are not intended to be reinstalled/ replaced.

Alternate Solutions – V




PEM® Type SMPS™ nuts and PEM® Type MSO4® standoffs can be a great

alternative for the M2.5 extruded threaded holes in the metal sheet illustrated on

the slide #6 in Green.

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Alternate Solutions – VI




PEM® Type SETSO4 series standoffs can also be a good alternative to replace

the M2.5 extruded tapped holes (illustrated on the slide #6 in Green) in metal

sheet, no need to prepare a mounting hole in application.

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Alternate Solutions – VII



Retained Magnet

The magnet shown in slides 13-15 can be replaced with a

clinched magnet. This eliminates the need for adhesive tapes

providing a much stronger, more durable and longer lasting hold. It

also places the magnet coplanar to the surface for better attraction

properties. The magnet can be a standard magnet or even correlated

magnetic product (The RCM is currently being developed).

Back Side

(Projects above plate)

Front Side

(Coplanar to plate)

Clinch features

Placement of the clinch feature can adjusted so that the magnet face

can be positioned at any point at or above the panel.



Conclusions and Summary





Conclusion

Detail Slide – Copy and use for details. Summarize the findings and alternate

solutions.

Through the teardown process, we identified that 19 pieces M2.5 screws and 7

pieces (aluminum alloy) M2.5 standoffs with metric profile thread are used

in the device. Additionally, eight integrated M2.5 internally threaded tapped holes

and four extruded threaded holes are used in certain parts for fastening

purposes.

As indicated earlier, PennEngineering can help make the device more

competitive by employing both standard solutions and solutions uniquely

modified for this keyboard.

The use of PEM hardware clinching standoffs and micro fasteners could provide

savings worth considering.


Documents

BrydgeAir Keyboard for iPad Air - PennEngineering · BrydgeAir Keyboard for iPad Air With the back cover removed we have a total of thirteen screws appears. Step 3: Initially we remove