Components
1- bottom shell-ABS plastic-injection moulding
2- button-ABS plastic-injection moulding
3- top shell-ABS plastic-injection moulding
4- light guide plate-PMMA-injection moulding
5- wheel-PMMA-injection moulding
6- wheel cover-rubber-injection moulding
7- battery cover-ABS plastic-injection moulding
8- switch-ABS plastic-injection moulding
9- main screw-steel-thread rolling method
10- screw-steel-thread rolling method
11- PCB-glass fibre composite material
12- sensor cover-PMMA-injection moulding
13- decorative button-ABS plastic-injection moulding
14- light guide plate&bluetooth switch-PMMA-injection moulding
15- coil-steel-stretching, lightening and winding
Circuit Board Information
BCM20730-single-chip Bluetooth transceiver
456RD K348-power supplies and adapters
T240 Pa68-processor?
A3000M14444T-sensor?
Tools
A screwdriver was used to disassemble the shell and the circuit board. A pair of needle-nose pliers is used to disassemble the light guide plate. Other parts are fixed by snap-fit and were removed by hand.
Design Elements
Light guide plate: Before teardown, I thought there might be a line of LED directly under that plate. But it turns out to be only one LED on one side of that plate. I think it is very clever to use such elements to create ambient light. You can light up a large area using only one LED. The side in contact with the LED has a glossy finish to better convey the light and the side that shows the light has a matte finish to display the light. I am very curious about why one side of that plate is jagged. Maybe to create some variation of light?
Decorative button: I think this is a bad design example. The decorative button turns out to control something after I tear it down. I remember pushed it before, it is very hard to push and I have to use my nail. And pushing that switch did not change anything. Also, there is another silver element on the shell purely for decoration. So I just assumed it is for decoration too.