CN200990320Y

CN200990320Y - Keyboard device

Info

Publication number: CN200990320Y
Application number: CN 200620175178
Authority: CN
Inventors: 陈洲任
Original assignee: Kinpo Electronics Inc
Current assignee: Kinpo Electronics Inc
Priority date: 2006-12-29
Filing date: 2006-12-29
Publication date: 2007-12-12
Anticipated expiration: 2016-12-29

Abstract

The utility model relates to a keyboard device, which utilizes a conductive sheet to convert a three-way input key into a two-way input key, thereby achieving the purpose of reducing the design complexity of the key. The keyboard device of the utility model can not only be applied to the input system of the prior art, but also can achieve the same technical effect.

Description

Key board unit

Technical field

The utility model relates to a kind of key board unit, particularly relates to a kind of key board unit that can simplify button design complexities in it.

Background technology

In electronic installation, its input system is in order to as the key player who links up between electronic installation and user.With the PC is example, for to allow the user can be easily with data storage to PC, PC all has the keyboard in order to input data usually.Perhaps, be example with a telephone set again, it also must have a numeric keypad, imported telephone number by just to be allowed the user and calls.

Fig. 1 illustrates to having the calcspar of known input system 100 now.Please refer to Fig. 1, when the user pushes button C1～C9 one of them (for example being button C1) in key board unit 101, first pad 1, second pad 2 and three pad 3 of button C1 this moment in it can conductings together, so as can be known be, via resistance R 1, R4 and R7 with system voltage V _CCCan provide interruption pin position INT0 and the general output of interrupt signal IR to go into pin position I/O0 (disconnected hereinto pin position INT0 is the high potential action) after the dividing potential drop to CPU 103, and after the interruption pin position INT0 of CPU 103 received this interrupt signal IR at this moment, one section interrupt service routine can carrying out in it was detected button C1～C9 is carried out button.

Then, CPU 103 can be according to detecting sign indicating number that it obtained (that is interrupting the state that pin position I/O0～I/O2 is gone in pin position INT0～INT2 and general output), and in the key value of finding out of searching the built-in table of comparisons correspondence in unit 105, so that electronic installation know the user by button, and then produce corresponding action.

Fig. 2 A and Fig. 2 B illustrate layout schematic top plan view and the generalized section on printed circuit board (PCB) (PCB) 201 into above-mentioned button C1～C9 respectively.Please merge with reference to Fig. 1, Fig. 2 A and Fig. 2 B, can be found out obviously that by Fig. 2

A pad

1,2 and 3 arrangement mode of layout on PCB 201 of button C1～C9 is to take the concentric circles mode to arrange, its Intermediate gasket 1 is coupled to system voltage V _CC, pad 2 is coupled to the interruption pin position INT0～INT2 of corresponding central processing unit 103, pad 3 then is coupled to the general output of corresponding central processing unit 103 and goes into pin position I/O0～I/O2.

Then can find out by Fig. 2 B, as user during to conductor 203 application of forces, under desirable state,

pad

1,2 and 3 can contact simultaneously, so that interrupt signal IR to be provided the interruption pin position INT0～INT2 to the corresponding central processing unit, and cause CPU to carry out its one section interior interrupt service routine, button C1～C9 is carried out the button detecting.

Yet, under actual state, because conductor (for example being the metal conductive materials of Matal Dome) 203 itself is to have elasticity, so as user during to conductor 203 application of forces, its mode of exerting pressure (angle of for example exerting pressure or the strength of exerting pressure) probably can make conductor 203 produce distortion, it is as Fig. 2 C illustrates, and so can cause the

pad

1,2 and 3 of button C1～C9 can't be with the time conducting, to such an extent as to CPU 103 can produce erroneous judgement, and then cause electronic installation to produce the corresponding error action.

So in order to solve the above problems, the existing known people of having has proposed a kind of layout architecture of button, its by with the described key arrangement of prior art on multilayer board, and by special layout cabling (layout) mode, with reach user no matter exert pressure button mode why, all can make three pads in it with the time conducting.

Yet, according to above-mentioned technical solution, though can reaching, its topmost advantage solves existing known button because the user produces the disadvantages associated that distortion is derived to the conductor application of force, and more can reach the cheap purpose of design cost, but just reached the effect that it desires to reach, so can make the design complexities of button increase because this technical solution must see through special layout cabling.

Summary of the invention

In view of this, the purpose of this utility model just provides a kind of key board unit, and it is by utilizing a conducting strip, so that the three-dimensional input button of prior art is changed into two to the input button, so to reach the purpose of the design complexities that reduces button.

Based on above-mentioned and other purpose, key board unit provided by the utility model comprises plastic slice, most buttons, and conducting strip.Wherein, the upper right corner of this plastic slice has first datum mark, and its lower left corner has second datum mark.These buttons are to arrange and be configured on the plastic slice with array way, and each button has first pad and second pad, and wherein this first and second pad couples first current potential.The upper right corner of conducting strip has the 3rd datum mark, and its lower left corner has the 4th datum mark, wherein this 3rd with the 4th datum mark first and second datum mark with plastic slice is corresponding respectively, and this conducting strip couples second current potential.Wherein, when one of them is enabled when these buttons, first, second pad in it can with lead pad conducting each other.

By technique scheme, the utility model key board unit has following advantage at least:

Key board unit provided by the utility model, because convert above-mentioned conducting strip to by first pad of the three-dimensional of prior art being imported button, so the three-dimensional input button of prior art can be converted into two to the input button, to reduce the design complexities of button, key board unit of the present utility model whereby not only can be applied in the input system of prior art, and more can reach same technology effect.

And for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, preferred embodiment of the present utility model cited below particularly, and cooperate appended graphicly, be described in detail below.

Description of drawings

Fig. 1 illustrates to having the calcspar of known input system now.

Fig. 2 A and Fig. 2 B illustrate respectively and are layout schematic top plan view and the generalized section of Fig. 1 button on printed circuit board (PCB) (PCB).

Fig. 2 C illustrates the schematic diagram of existing known user its distortion that causes when the conductor application of force.

Fig. 3 illustrates and is the key board unit schematic diagram according to the utility model preferred embodiment.

100: input system 101,300: key board unit

103: CPU 105: search the unit

201,301: printed circuit board (PCB) 203: conductor

301: plastic slice 303: conducting strip

301a, 303a, 301b, 303b: datum mark

C1～C9: button 1～3: pad

R1～R7: resistance

INT0～INT2: the interruption pin position of CPU

I/O0～I/O2: the pin position is gone in the general output of CPU

IR: interrupt signal FV, SV: current potential

Embodiment

The technology effect that the utility model is desired to reach is for reducing the design complexities of existing known button, and following content will be done one at the technical characterictic of this case and the effect desiring to reach and encyclopaedize, and consider and examine to offer this utility model those skilled in the relevant art.

Fig. 3 illustrates and is key board unit 300 schematic diagrames according to the utility model preferred embodiment.Please merge with reference to Fig. 1 and Fig. 3, the key board unit 300 of present embodiment is applicable in the disclosed input system 100 of Fig. 1, to replace its key board unit 101, so can also reach input system 100 the effect desiring to reach, and do not need the technical solution quoted from as the layout architecture of the button of prior art, and similarly can solve existing known button yet because the user produces the disadvantages associated that distortion is derived to the conductor application of force.

In present embodiment, key board unit 300 comprises plastic slice 301, most button C1～C9, and conducting strip 303.Wherein, the upper right corner of plastic slice 301 has the first datum mark 301a, and its lower left corner has the second datum mark 301b.Wherein, the material of this plastic slice 301 is for example drawn plastic cement material as (Mylar) for honey, but is not defined as this type of at this, that is to say that the user can substitute different types of plastic cement material according to actual demand.

Button C1～C9 arranges and is configured on the plastic slice 301 with array way, and each button C1～C9 has as the pad 2 of key board unit among Fig. 1 101 and pad 3 and its resistance by correspondence respectively and is couple to current potential SV (for example being earthed voltage GND) as Fig. 1.

The upper right corner of conducting strip 303 has the 3rd datum mark 303a, and its lower left corner has the 4th datum mark 303b, first datum mark 301a with the upper right corner of plastic slice 301 is corresponding together with the second datum mark 301b in the lower left corner respectively for it, and be coupled to current potential FV, so with the pad 1 of button C1～C9 of replacing prior art Fig. 1 as Fig. 1.Wherein, the material of conducting strip 303 for example is the metal material as the silver slurry, but is not defined as this type of at this, that is to say that the user can substitute different types of plastic cement material according to actual demand.

Then, please continue with reference to Fig. 1 and Fig. 3, in present embodiment, when button C1～C9 being enabled wherein (enabe, that is pressed by the user), the pad 2 in it and 3 is understood conductings together with conducting strip 303.Whereby, if when key board unit of the present utility model 300 replaced the key board unit 101 of Fig. 1 in the prior arts, it also can reach the technology effect that input system 100 is desired to reach in the prior art.

So according to as can be known above-mentioned, in present embodiment, button C1～C9 be not button C1～C9 as Fig. 1 in the prior art be three-dimensional input button, it only becomes two to the input button, so what can know by inference is, two design complexities to input button C1～C9 of present embodiment can reduce greatly, and it will be further appreciated that at this, two of present embodiment can't be along with the increase of its area to input button C1～C9, and causes button C1～C9 as Fig. 1 in the prior art because the user produces the disadvantages associated that distortion is derived to the conductor application of force.

In addition, when the interruption pin position INT0～INT2 of the CPU 103 of Fig. 1 in the previous technology was high potential action (high active), the current potential FV that conducting strip 303 is coupled will be system voltage (V _CC), and when the interruption pin position INT0～INT2 of the CPU 1 03 of Fig. 1 in the previous technology was electronegative potential action (low active), the current potential FV that conducting strip 303 is coupled will be earthed voltage (GND).

In sum, key board unit provided by the utility model is because utilize a conducting strip, so that the three-dimensional input button of the key board unit of prior art is changed into two to the input button, so not only can reach the design complexities that reduces button, and when the button area need increase design, also be not subjected to produce distortion because of the user to the conductor application of force, and cause the CPU of input system to produce the influence of judging by accident as the button of prior art.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.

Claims

1. A keyboard device, characterized in that it comprises:

a plastic sheet with a first datum point in its upper right corner and a second datum point in its lower left corner;

A plurality of buttons are arranged in an array and arranged on the plastic sheet, and each button has a first pad and a second pad, wherein the first pad and the second pad are coupled to a first potential; as well as

A conductive sheet has a third reference point in its upper right corner and a fourth reference point in its lower left corner, wherein the third and fourth reference points correspond to the first and second reference points respectively, and the conductive sheet coupled to a second potential,

Wherein, when each button is enabled, the first pad and the second pad are in conduction with the lead pad.

2. The keyboard device according to claim 1, wherein the plastic sheet material includes Mylar.

3. The keyboard device according to claim 1, wherein the material of the conductive sheet comprises silver paste.