Keyboard
Appearance of enhanced keyboard (58
keys) without housing. Consider it your device.
The keyboard is placed on a metal base - a sheet of colored
metal special formy.Po edges are projections - ears, fixation
of the shell at the top projections - the site for the film clip
contacts. At each site with 2 holes
fixing, at the very basis of several
mounting holes, and one, maybe
2 for fixing the keyboard and films.
Based on the fit of the film. This is somewhat
layers of films fused together in some places on the edge
(figure sketched my keyboard, whose films are fused
at right), not to rassovmeschalis
between them. I believe this is the kind of
keyboards, which advertised in different
magazines, even in the 80 years, sent out kits
mail. Promising to 200,000 (!) Clicks with no signs of wear,
now I do not doubt it! I did not count, but it appears that the
four films deposited metal tracks and
area under the keys, and another two films are separated
between the clickable films - contacts, and they have holes
opposite sites klavish.Chetyre layer (instead of two) are used
for hardware implementation of additional keys, pressing which
is formed by double-clicking - closes the top two layers, and
then lower. Of course, the main keyboard are closed
only two layers (the others are no paths
and pads - no need to). Since the different
layers are the same signals (for double keys), they must be
interconnected. This is done on the ledges of the films in the
top, where they form large contact areas, the left data, right
adresov.V to these places some of the film cut off and the
remaining (I think two) lie on each other, closing the adjacent
layers (Contact pairs of the same name rocker), for which the
film in these places must good cuddle. For this purpose, and
made protrusions in the metal base on which
posted ploschadki.Na contact them superimposed metal
rectangles, and with two screws (if they sliced
thread, or even with two nuts) is pressed against the film, but
not directly.
Under each rectangle of thin layer
black gum (or a white circle of rubber, the size of covering
all lines of contact). Each pair of pressed films in favor of
basis and stretches to the size of the height of foundations
or even more (not took it for), forming two
film loop contacts (addresses and data). One of the films of
the net, probably for strength and protection of the second,
which are kontakty.Pri they are covered with an insulating
layer of blue tsveta.V end loops Contacts expand (as well as
some y pads basis) and free
izolyatsii.Zdes relies on them to insert,
pressed into the slot that
practice is rough and messy ...
In the films to make a hole for attaching a keyboard, and a
pair of large holes for the fixing of the keyboard and films.
Since the film priplavleny places, they can be widely divided
(to rub with a dry cloth, preferably without leaving excess of
particles, removing accidentally caught artifacts), but it is
unlikely necessary, due to tightness sloev.Plenki (in open
spaces) oxidize and fear aggression (including adhesive)
materials, but by themselves are not completely spoiled. In
view of the subtleties of coverage is not cleaned
rekomenduetsya.Luchshe once well and gently squeeze as much as
possible to a large surface area contacts. On soldering,
heating did not Think ...
Keyboard itself consists of a plastic mask, which are
inserted into the plastic keys. Pre-mask-wearing springs, which
throw the keys Pressed in polozhenie.V each key is inserted a
small spring, which presses the film by pressing a button. Four
large buttons are rocker, eliminating the bias in the press.
The mask is molded of special shape. Total
rectangular, it has a cylindrical protrusions on the top -
storone.Po outer ledge of a button. The tabs and put on large,
but soft, black springs (there are different lengths and
therefore the rigidity, but in general impression of the press
does not spoil), cast and hold in the initial position. In
addition, press rests on the ledge, which limits its
course at the end of the back side of the mask nazhatiya.S made
a lot of holes, and there space within the mask defined by its
tall (not counting the height of the projections). openings in
the projections used to progress key and clicking on each key
plenki.Dlya There are two rectangular mounting holes
and one round hole fiksatsii.Dlya major keys have extra holes
for fastening and fixing. Fragments of the keys
when you move in the holes within the height of the mask, but
the films do not touch (Restricted projection).
On the reverse side of the mask in front of four large keys
(2 CS, EN, SP), melted a pair of legs. They inserted rocker.
Rocker is made of a thin stiff wire, bent in the shape of a
broad, low capital P with curved edges. 3 is approximately
equal, one thick and larger for press SPACE. Its edges rocker
is put into a special slot latches keys (keys at the same time
must be inserted with a repulsive spring and should be be in
the damper position to Slotted clamps were on the back
by mask) and then inserted into the yoke with a click of its
long side (the tip of the capital P) in the molten feet maski.V
legs rocker mask can be freely (With a little friction) to
turn. When Clicking on the edge of a major key, it is slightly
leaning in this direction, its latch clicks on the edge of the
beam, it turns pushing the other with its edge on the other
lock - on the other end of the same key, utyagivaya behind him.
Thus, long keys are pressed almost without bias, not stuck.
Although there may be problems if beam is bent, or the key is
bad cast, or worn, but still pressed for more than a convenient
(though not at the edge).
To remove the rocker, you can press
key so that the visible edge
rocker on the back of the mask, and
This screwdriver to press the long part of the beam to exit
from his feet mask. On the reverse side of the mask on the
perimeter is made ledge, which lies on the mask film.
Also on the square mask made several oblique projections.
All of them are quite thick, and the mask presses them plenki.V
overhangs mask the back of the metal base, screwed 8 screws. So
as the mask is firmly against films, and they are to the base,
while the film stretched over the entire surface, providing a
reliable gap between the layers with kontaktami.Esli some group
will still be closed, it is necessary to determine its (impact
on button significantly alter the contact resistance), and
releasing a few screws, pull, smooth film in this location,
then pull shurupy.Ne tighten the screws much as they can cut
plastic maski.Togda this place should fill simple (paper, for
example), glue, carefully screw the screw and wait for drying.
You can also fill the hole with wood chips matches and
carefully screw the shurup.Na the reverse side of the mask, on
ledges have a pair of pins (at least one), which
pass through the holes in the films and are
a metal base for proper fixation throughout konstruktsii.Yamku
this pin can be seen in the figure above the numeric keypad.
Each key is cast from a more rigid
(Less elastic) plastic than a mask. From
top - front - side down departs
hollow cylinders, inside which there is a subtle shtyr.Na this
pin is worn (possibly circumferential, surfaced or glued) a
little stiff black (there are also white) spring, is able to
compress times 1.5. Unnecessarily do not try to
rent, sometimes it stretches them, and wear
to hold on, hold on neprosto.Pruzhinki
very reliable, I have not had occasion to
flew.
Also down from the edges of two key depart
mounting pin, ending a triangular rim (like arrows). During the
assembly, when worn down to the ledge, these pins are inserted
- latched into the mounting holes and a side does not allow
button fly off the ledge, restricting the position of the keys
pressed.
To remove the key, click on the bumpers on the back of the
mask a thin screwdriver, but press gently and at the same time,
but first remove the beam from this key, if it has. If the key
very tight shot, then worn too will be tight. Must wear neat,
evenly pressing the whole key, pushing the pins at the mounting
holes. Key worn with a click (no more springs
forgot to wear?). If this feeling
a lot of effort, it is better not wear down,
but first erode its bumpers pins Needle file or a sharp knife.
Next to the pins attachment on a key priplavlen round
cone-shaped pin fixation (stick).
During the assembly, he enters into their round hole. When you
press the mounting pins away from the mask and move freely in
their square holes (to not to interfere with depression), and
pin fixation of slides in his hole, not allowing the key to
turn, and hurt its square edges of adjacent keys. This pin
really should slide into the hole - ie touch the mask. But if
you have the key stuck at the end of the (male - cone, thicker
at the top of the key), then this defect, and should sharpen up
a little pin at the base.
All digital, letter, sign and arrow keys from the white
plastic (some yellowish - technologically) color. Other keys
are gray, but the key BREAK is krasnoy.Na keys printed in black
symbols, and there is a protective coating. But whether
coverage is not always uniform, then the technology is such
inscriptions over time (usually very large) are erased from the
front - Pressure - side. Interestingly, the survivors are
forced to label not easy to erase, just erase.
From his experience, I can say that the keyboard is neatly
connected and enclosed in a case, works perfectly (at least 3.5
MHz). Of course, if it was well-built, or gently brought to
uma.Eto only convenient and triggered soft keyboard, on which
nothing gets stuck and does not break a very long time -
literally years, until zasoritsya.Esli you have a problem with
it, then probably you no luck with the build, connect, and
themselves you can not fix it (the classical
laziness or lack of time, patience or
information - for example, this file). Enough to analyze this
device keyboard, to understand its advantages.
Sturdy metal base, which
can be used as a screen! Which is not
break even if stepped on klavu.Germetichno protected contact,
in fact, free from iznosa.Dempfiruyuschee - through the spring
- a soft push, not damaging the film. Advanced dropping spring
guaranteeing the opening (as in pushed out situation of small
springs are hanging over films without touching them). No wear
films t.k.priraschenie elongation of the film at
Pressing equal to the thickness of the film and the insulating
negligible in front of the area - a radius of
pad keys. Reliability and
resistance to shock loads (you
guess, to what can bring professional stiffness, difficulty and
obstruction of games on the Speccy). When you hit the keys are
based on projections mask that their projections distributed
over clicks film t.k.osnova metallic solid, no
bends, Do not tilt, the pressure on the film we obtain the
distribution and relatively small - it is checked repeatedly.
The disadvantages are primarily the sensitivity of film
contacts mechanical (scraping) and chemical
(Sticky side of the blue tape) influences. T.e.trebuetsya
careful, accurate connection film loops. The disadvantage
is the increased capacity of the film keyboard (due to
deposition of films and wide lanes), although with the right
interface, everything works without problems. In TURBO, maybe
something will manifest, but literate circuit design and the
way this can be circumvented. You can call the lack of
complexity of the keyboard, but it is more true to say about
the uneasy device in front of some other types of
keyboards. Is the keyboard of this type
more demanding on the quality of the process
production than any other punching, and if all
respected technology (which does not always have
our case) in a keypad
disappointed.
The figure I cut edge (not climbed)
and did not paint film loops by simply
signed numbered conclusions. It is almost perfectly
proportional to the type of my keyboard without korpusa.Vidna
frame mask around a set of keys within a few points - the holes
on the mounting screws (with reverse side). Also facet of the
fixing pin - on digital klavishami.Maska with the keys is on
the films - they stand out from the masks, some covering a
metal base. At the edges of the film seen some unused holes and
places priplavleniya films - pryamougolniki.Vverhu on the pads,
metal rectangles that touches the film, and the points
- Mounting screws. From a rectangle
out plumes of films through which rayed edge metal framework. On
actually contacts the base mounting
slightly wider, but it failed to show and
right now my cable is not sticking Claudia, only slightly
raised petals foil. Which are soldered to the board, fixed with
rectangles keyboard. K boards have soldered wires.
A metal base to be drilled two holes in the middle (height)
5 mm from the edge, and using them to strengthen
keyboard to the appropriate body (which is also drilled holes).
The figure shows holes - tochki.A ears keyboard (below the top
corners of the base) used for fixation in the body in the
correct position (under the ears cut out place).
By KSA-7G 25.12.2003
