CN2078463U - Pressure-sensitive switch matrix for computer input by handwriting/keying - Google Patents

Abstract

The utility model discloses a pressure-sensitive switch matrix for the computer input by the handwriting/keying and belongs to an electronic computer input device, comprising an electric conduction film, an insulating retina, a printed circuit board, etc. The local deformation of the electric conduction film caused by the pressure of the writing or the press is contacted with the electrode of the printed board, and consequently, the position information is changed into the electrical signal, and then input into the computer. The utility model has the advantages of simple structure, and low cost. The information can be imported into the computer by a pen, a bar, a fingernail, or a key-press. The utility model can be widely used for the situations of needing to import the Chinese character information, like a computer, a word processor, an electronic keeping recorder, an information machine, etc.

Description

Pressure-sensitive switch matrix for computer input by handwriting/keying

The utility model relates to a kind of robot calculator input media.

In the online recognition system of computing machine handwritten Chinese character, adopt the X-Y tablet as input media usually.The former tablet pattern that is used for of X-Y tablet, its area is big, dot matrix is close, and be used to import Chinese character and waste one's talent on a petty job a little, and the pen that its used " pen " neither be general.

The purpose of this utility model is to provide a kind of light, inexpensive replacement device.It adopts pressure-sensitive mode, therefore the written information of any hard-tipped pen, wooden stick even nail can be converted to electric signal input computing machine, also can be used as keyboard input key information.Key problem in technology is to have designed a kind of conductive glue slice and forms pressure sensitive switch matrix with insulation nethike embrane, printed-wiring board (PWB) etc.

Fig. 1 conductive glue slice.

Fig. 2 printed-wiring board (PWB).

Fig. 3 part assembling drawing.

Conductive glue slice (1) is widely used in the electrical coupling between liquid crystal display device and the printed panel at present.It is by many para tapes (2) and conductive strips (3) alternate composition.The characteristics of this conductive glue slice are strip, and promptly close the and length l of width w and thickness d is much larger than width w.This novel characteristics are thin slice shape, i.e. close the and d＜w of l and w, its conductive strips are that the utmost point of switch matrix thereby make conducts electricity bandwidth w₁＞2 insulation bandwidth w₂Better.

Another utmost point of each switch is the parallel pole (5) on the printed panel (4).It is mutually vertical with conductive strips (3) on the conductive glue slice (1), and middle interval is with the nethike embrane (6) that insulate.Each hands over the justice point to form a switch.When conductive glue slice is not stressed since the insulation nethike embrane existence, each not conducting of switch.When the conductive glue slice somewhere presses (when writing or pushing), the conductive glue slice distortion, part in compression protrudes into mesh and contacts with the printed panel electrode and make one or several switch connections.Computing machine can obtain the positional information of writing or pushing by the scanning to switch arrays.

The insulation nethike embrane can be weaved with mylar, paint film or chemical fibre.Thickness should be below 0.3mm, and the size of mesh and rare close need are suitable, makes conductive glue slice guarantee not contact with printed panel when pressurized not, and when writing or push, can conducting under less pressure.

Be the protection conductive glue slice, above it, cover an insulation cover plate (7), as polyester sheet or PVC sheet.On this cover plate, can stamp keypad character and help nine writing standardized palace lattice.

Press box (8) will insulate cover plate (7), conductive glue slice (1), insulation nethike embrane (6) is fixed on the printed panel and the conductive glue slice two ends are pressed on the lead-in wire (9) of printed panel.

Example 1:

Conductive glue slice d=1mm, w₁=2.8mm, w₂=0.2mm, l=60mm, conductive strips are several 16, w=60mm, (the both sides para tape is suitably widened) material is a synthetic rubber.

The wide 2.8mm of printed panel electrode (5), die opening 0.2mm fills out with epoxy resin in the break joint.It is gold-plated to tie polishing.Number of electrodes is 16.

The insulation nethike embrane is made with nylon wire.About nylon wire diameter 0.05mm, longitude and latitude interweaves, mesh 1.6mm * 1.6mm.The typing of spraying one deck glue.Glue can be used the chloroformic solution of organic glass.

The switch matrix useful area of making thus is 48mm * 48mm, is used for importing one by one handwritten Chinese character.Be printed on miniature keyboard in the cover plate Lower Half, but dub the input alphabet punctuate with pen.

Example 2: membrane keyboard.

Conductive glue slice d=1.5mm, w₁=15mm, w₂=4mm, l=70mm, w=156mm.The wide 15mm of printed panel electrode, gap 4mm, electrode strip is several 3, the long 166mm of electrode.With the polyester film punching of thick 0.2mm as the insulation nethike embrane, about the 3mm of aperture, about pitch of holes 4mm.Insulation cover plate (7) is used the transparent PVC sheet, back face printing keypad character, key spacing 19mm.Can be used as the single card microcomputer keyboard.

The utility model is simple in structure, and is inexpensive, and available any pen, rod, nail is write or keying input information.

Claims (2)

1, a kind of computing machine hand-written/button input pressure sensitive switch matrix; it is characterized in that by the parallel electrically conductive band of conductive glue slice a utmost point as switch arrays; by another utmost point of the parallel pole on the printed panel, every with the insulation nethike embrane, the protection of insulation cover plate is arranged above the conductive glue slice between the two as switch arrays.

2, switch matrix as claimed in claim 1, it is characterized in that conductive glue slice be laminar and the conductive strips width greater than 2 times of para tape width.