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RS 76 full-travel keyswitches
The Rafi full-travel keyswitches RS 76 are modular
systems for designing individual key blocks and
Contact principle
There are two contact principles:
keyboards in the 3/4 inch (= 19.05 mm) grid.
Definitions
– Mechanical (M):
– Contactless (C):
Cross contact (RS 76 M)
Bridge contact
(RS 76 M, illuminated)
Based on Hall-IC (RS 76 C)
Momentary keyswitches
Momentary keyswitches return to their initial position
after being pressed (momentary action).
Latching keyswitches
Latching keyswitches lock when actuated and are
returned to their initial position when pressed again
(push-push action).
Keycap materials
Keycap without legend insert: ABS
Keycap with legend insert:
– Keycap body: ABS
– Lens: PC
Keycap, n-module
A 2-module keycap f. ex. has the twofold length of a
1-module keycap.
Soldering
The soldering temperature should not exceed 250 ° C, the
soldering time not be longer tahn 3 seconds.
All RS 76 C-keyswitches can be soldered in solder bathes.
The assembled PCB should be cleaned only by using
brushing machines from the soldering side ot the PCB.
The cleaning agend should not exceed the component
side ot the PCB.
All keyswitches can be flow-soldered, provided that an
acid fluxer is used and that the whole unit is cleaned
afterwards in de-ionised water.
Cleaning
Keyswitches should not be washed in freon or similar
substances as a lubricant is used, otherwise the operating
life of the keyswitches will be reduced.
If complete keyboards are to be cleaned by dipping, it
must be remembered that they keyboard may only be
dipped in the dipping solution as far as the component
side of the PCB.
Legending of keycaps
Keycaps can be legended by different methods:
Two-shot moulding
Using this method the symbol is separately manufactured
Engraving
In this labour intensive process the keycaps are engraved
with the required symbol, then inlaid with ink. Only used
for small volumes.
4
from a plastic and then the appropriate keycap form is
moulded round it. Advantage: The character becomes a
integrated part of the keycap, thus eliminating abrasion.
All Rafi keycap sets with standard legending are
Laser-printing
This method of legending can be recommended when
complete keyboards are required in different keyboard
RS
76
manufatured by this method.
Customer specific two-shot moulded keycaps on request.
Printing
Keycaps can be printed with a two-component ink on
request. The abrasin of this kind of legending is high.
This method of legending is suitable for average
volumes.
4 - 120
layouts for which Rafi will develop the respective
software. The keyboards can then be legended within a
short time. This method of legending ist particularly
recommended for average to large volumes.
Legend inserts
In the case of keycaps with replaceable legend inserts it is
possible to print or engrave the legend inserts. As these
insets are protected by the lens, there can be no abrasion
here either.
PCB Keyswitches
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相关PDF资料
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相关代理商/技术参数
5.82110.9099217
功能描述:TASTE M. LEUCHTBALKEN "NUM LOCK" 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.000/0754
制造商:C&K Components 功能描述:- Bulk
5.82200.0000103
功能描述:KEYCAP 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.0000305
功能描述:KEYCAP 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.0000406
功能描述:KEYCAP 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.0000505
功能描述:KEYCAP 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.0000602
功能描述:KEYCAP 制造商:rafi usa 系列:* 零件状态:在售 标准包装:10
5.82200.0000754
功能描述:开关配件 Keycap 1 Module Lt. Gray
RoHS:否 制造商:C&K Components 类型:Cap 用于:Pushbutton Switches 设计目的: