TEL:+86-15812821892  E-mail: lushufen@dongchengdg.com

Yoke assembly Carbon sleeve silver conductive point

POLY DOME (Card position assembly):
Through the positioning hole and silica gel column positioning, no need to paste, cheap!When the key is pressed, the contact center is concave. The conductive paste printed on the contact contacts with the circuit on the PCB, thus forming a circuit, so that the whole product can work normally.

111

PET+SPACER+ (Single-sided adhesive) + conductive point: 

1. DOME(PET)

2.(Spacer)

3.  (Conductive point)

Product parameters:

1. Adhesive:

 


(mm)

thichness

initial force

retentivity(hr/kg*inch)

adhesive force(kgf/inch)

Rubber material/project





Transparent/white one side glue

·

 

thickness of adhesive0.035~0.05

The adhesive rolling distance of corresponding steel balls is less than 10cm

·

 

8↑

0.6

2.Conductive point: carbon silver, first printed silver paste in the printed carbon paste, thickness: 0.008~0.012.Advantages: strong antioxidant, not easy to scratch.

 

Carbon silver

resistance


<10Ω

3.Product parameters

 


 

KEY point diameter(mm)

FORCE(g)

CLICK(%)

springbackFR(g)

STROKE(mm)

LIFE

Environmental testing conditions

DOME








0.1PET

Φ4.5~5.0

100~180

45~75

>25

0.3~0.45

30

7085%RH48hrs

0.125PET

Φ5.5~6.0

160~260

45~75

>30

0.4~0.55

50

7085%RH48hrs

4. Tolerance requirements:

project

positioning hole to positioning hole(mm)

Positioning hole to shape(mm)

Shape to shape(mm)

Hole diameter(mm)

Positioning hole to key(mm)

/sample






Manual sample

±0.15

±0.15

±0.15

±0.1

±0.15

Mould sample

±0.1

±0.1

±0.1

+0.08/-0

±0.1


Note: (1) the positioning hole are minimum aperture Φ 1.0 mm;

(2) the distance between the inner side of the two key points shall be greater than 1.0mm;

(3) The hole edge of the mechanism should be greater than 1.0mm from the key point;

(4) The minimum diameter of the hole of the SP piece is greater than 0.4mm than the diameter of the key point.

5. The sample delivery:


The new model(50~100pcs)

The old model(50~100pcs)

Manual sample

3 ~ 4 working days

2 ~ 3 working days

Mould sample

1 working day after the mold returns

2 ~ 3 working days

Mold delivery time: a. forming mold 3-4 working days

B. 6-7 working days for steel mold

Note: 1. The conditions for the life test are as follows: the silicone flat head of the hitting head;Diameter: Φ 1.5;Speed: 2~3 times/second;Strike power: 400-500g.

2. Life determination: a. Before and after life hitting, the rate of change of elasticity and feel of DOME is less than 30%;B. No ink shedding, no KEY point cracking.



CONTACT

  (+86)-15812821892
  lushufen@dongchengdg.com
    Dongcheng Huimei Technology Park,
Chashan Town, Dongguan, Guangdong, 
China

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