CN201733288U - Wall touch screen switch - Google Patents

Abstract

The utility model discloses a wall touch screen switch. The wall touch screen switch comprises five parts, i.e. a power supply circuit A, a logic control chip circuit B, an output control relay circuit C, a touch screen D and a backlight E. The utility model has the advantages of attractive appearance, powerful function, simple circuit, low cost, wide input voltage range, high output stability, low noise and durability.

Description

A kind of wall touch-screen switch

Technical field

The utility model relates to a kind of wall touch-screen switch.

Background technology

Touch-screen is used a lot at present on market, as infrared touch panel, surface acoustic wave touch screen, but commonly used resistive touch screen, capacitive touch screen is arranged.Resistive touch screen belongs to a kind of transducer that physical location is converted to the magnitude of voltage of representing X, Y coordinate that is equivalent to.It is as basic unit by one deck glass or polymethyl methacrylate, the surface scribbles the conductive layer of layer of transparent, be stamped one deck outer surface cure process, smooth scratch resistant plastic layer above again, its inner surface also scribbles the layer of transparent conductive layer, has the transparent isolating points of many tiny (less than mils) that they are separated insulation between two conductive layers.When the finger touch screen, the two conductive layers of usual mutually insulated has just had a contact in the position, touch point, cause is the even voltage field of 5V of a conductive layer connection Y direction wherein, make the voltage of detecting layer become non-zero by zero, after controller detects this signal of telecommunication, carry out A/D conversion, and with the magnitude of voltage that obtains compare with 5V get final product the Y-axis coordinate of touch point, in like manner draw the coordinate of X-axis, reach the output of control voltage.Capacitive touch screen is to utilize the induction by current of human body to carry out work.Capacitive touch screen is four layers of compound glass screen; glass screen inner surface and interlayer respectively scribble one deck ITO, and outermost layer is a skim silicon soil glassivation, on the interlayer ITO coating as working face; draw four electrodes on four angles, internal layer ITO is that screen is to guarantee good working environment.When finger touch is on metal level, because people's bulk electric field, user and touch screen surface form a coupling capacitance, for high-frequency current, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point, this electric current flows out the electrode from four jiaos of touch-screens respectively, and the electric current of these four electrodes of flowing through is directly proportional with the distance of finger, and controller draws touch point position by the accurate Calculation to these four current ratios.But there is no at present the wall touch-screen switch that combines and make with resistive touch screen or capacitive touch screen and single-chip microcomputer both at home and abroad.

Summary of the invention

The utility model provides a kind of wall touch-screen switch and directly replaces the mechanical contact-type switch on wall, it have aesthetic in appearance, function is strong, circuit is simple, cost is low, wide input voltage range, output stability is good, noise is low, durable, be the novel product that replaces the mechanical contact-type switch on wall.

For achieving the above object, the technical scheme that the utility model is taked is: a kind of wall touch-screen switch, and power circuit A is by protective tube F1, bridge rectifying block B1, the first filter capacitor C2, peak absorbance diode D4, R16, C3, switch control chip U3, the second filter capacitor C4, the 3rd filter capacitor C5, the 4th filter capacitor C6, the 5th filter capacitor C7, the 6th filter capacitor C9, diode D6, light idol ISO1, current-limiting resistance R18, the first divider resistance R19, the second divider resistance R20, accurate pressurizer U4, return feed and hold C8, switch transformer T1, the first filtered diode D5, the second filtered diode D8; Logic control chip circuit B is by logic control chip U1, crystal oscillator Y1; Output control relay circuit C is by first relay K 1, second relay K 2, the 3rd relay K 3, the 4th relay K 4, the 5th current-limiting resistance R9, the tenth current-limiting resistance R14, the 11 current-limiting resistance R15, the 12 current-limiting resistance R17, first sustained diode 1, second sustained diode 2, the 3rd sustained diode 3, the 4th sustained diode 7, the first protection triode Q1, the second protection triode Q2, the 3rd protection triode Q3, the 4th protection triode Q4, binding post CON3; Touch-screen D is by the first pull-up resistor R1, the second pull-up resistor R2, the 3rd pull-up resistor R3, the 4th pull-up resistor R4; Backlight E is made of CON4 backlight, the first current-limiting resistance R5, the second current-limiting resistance R6, the 3rd current-limiting resistance R7, the 4th current-limiting resistance R8, the 6th current-limiting resistance R10, the 7th current-limiting resistance R11, the 8th current-limiting resistance R12, the 9th current-limiting resistance R13; By the first filter capacitor C2 filtering, exported by switch transformer T1 by peak absorbance diode D4, R16, C3 peak absorbance through the B1 rectification for its AC; One the tunnel through the first filtered diode D5, obtain+12V after the second filter capacitor C4 filtering, respectively with first sustained diode 1, second sustained diode 2, the 3rd sustained diode 3, the negative pole of the 4th sustained diode 7 is connected with relay coil 1, another road second filtered diode D8, obtain after the 3rd filter capacitor C5 filtering+5V and logic control chip U1 the 4th pin, the 14th pin and the first pull-up resistor R1, the second pull-up resistor R2, the 3rd pull-up resistor R3, the 4th pull-up resistor R4, the first current-limiting resistance R5, the second current-limiting resistance R6, the 3rd current-limiting resistance R7, the 4th current-limiting resistance R8 one end connects, one the tunnel through the first divider resistance R19, the second divider resistance R20, take out identification voltage after the dividing potential drop, return the light idol SO1 that feeds by returning feed appearance C8, and by accurate pressurizer U4 voltage stabilizing, deliver to switch control chip U3 by the output of light idol again, voltage after the U3 alignment is delivered to switch transformer T1, makes the voltage of output more stable; Logic control chip U1 the 10th pin; the 11st pin; the 12nd pin; the 13rd pin respectively with the 5th current-limiting resistance R9; the tenth current-limiting resistance R14; the 11 current-limiting resistance R15; the end of the 12 current-limiting resistance R17 connects; the other end is protected triode Q1 with first respectively; the second protection triode Q2; the 3rd protection triode Q3; the 4th protection triode Q4 connects; the 6th pin; the 7th pin; the 8th pin; the 9th pin respectively with LED4; LED3; LED2; LED1 connects; the 17th pin; the 18th pin; the 1st pin; the 2nd pin and the first pull-up resistor R1; the second pull-up resistor R2; the 3rd pull-up resistor R3; the 4th pull-up resistor R4 one end connects, and crystal oscillator Y1 one end is connected the other end and is connected with U1 the 16th pin with U1 the 15th pin.

Description of drawings

Accompanying drawing is schematic diagram A-A of the present utility model.

Embodiment

Power circuit A by protective tube F1, bridge rectifying block B1, filter capacitor C2, peak absorbance diode D4, R16, C3, switch control chip U3, filter capacitor C4, C5, C6, C7, C9, diode D6, light idol ISO1, current-limiting resistance R18, divider resistance R19, R20, accurate pressurizer U4, return feed and hold C8, switch transformer T1, filtered diode D5, D8 and form; Logic control chip circuit B is made up of logic control chip U1, crystal oscillator Y1; Output control relay circuit C is made up of relay K 1, K2, K3, K4, current-limiting resistance R9, R14, R15, R17, sustained diode 1, D2, D3, D7, protection triode Q1, Q2, Q3, Q4, binding post CON3; Touch-screen D is made up of touch-screen KEYBORAD, pull-up resistor R1, R2, R3, R4; Backlight E is made up of CON4 backlight, current-limiting resistance R5, R6, R7, R8, R10, R11, R12, R13.

Its operation principle is: AC, is exported by switch transformer T1 by capacitor C 2 filtering D4, R16, C3 peak absorbance through the B1 rectification; One the tunnel obtains after D5, C4 filtering+12V supply output control relay circuit C use; One the tunnel obtains after D8, C5 filtering+5V supply logic control chip U1 use; One the tunnel takes out identification voltage after R19, R20, dividing potential drop, return the light idol SO1 that feeds by returning feed appearance C8, and, deliver to switch control chip U3 by the output of light idol again by accurate pressurizer U4 voltage stabilizing, voltage after the U3 alignment is delivered to switch transformer T1, makes the voltage of output more stable; Logic control chip U1 is by 4 pin and the power supply of 14 pin, by 10 pin, 11 pin, 12 pin, the output of 13 pin, and deliver to the Kai Heguan that each output control relay circuit C that organizes controls this group relay through current-limiting resistance R9, R14, R15, R17 respectively, thereby realize opening and closing of external circuit; Q1, Q2, Q3, Q4 are the protection triodes, and CON3 is an output wiring terminal; The signal that touch-screen touches is by 17 pin, 18 pin, 1 pin, the input of 2 pin of logic control chip U1; R1, R2, R3, R4 pull-up resistor; The control signal of backlight E is respectively by 6 pin of logic chip U1,7 pin, 8 pin, the output of 9 pin, controls turning on and extinguishing of CON4 backlight; R5, R6, R7, R8, R10, R11, R12, R13 are current-limiting resistances; Backlight is mounted in touch-screen behind, makes it can show switch pattern on the touch-screen clearly.

The utlity model has following advantage: it have aesthetic in appearance, function is strong, circuit is simple, cost is low, wide input voltage range, output stability is good, noise is low, durable, market prospects are wide, are the novel products that replaces the mechanical contact-type switch on wall.

Claims (1)

1. wall touch-screen switch, power circuit A is by protective tube (F1), bridge rectifying block (B1), first filter capacitor (C2), peak absorbance diode (D4), (R16), (C3), switch control chip (U3), second filter capacitor (C4), the 3rd filter capacitor (C5), the 4th filter capacitor (C6), the 5th filter capacitor (C7), the 6th filter capacitor (C9), diode (D6), light idol (ISO1), current-limiting resistance (R18), first divider resistance (R19), second divider resistance (R20), accurate pressurizer (U4), return feed and hold (C8), switch transformer (T1), first filtered diode (D5), second filtered diode (D8); Logic control chip circuit B is by logic control chip (U1), crystal oscillator (Y1); Output control relay circuit C is by first relay (K1), second relay (K2), the 3rd relay (K3), the 4th relay (K4), the 5th current-limiting resistance (R9), the tenth current-limiting resistance (R14), the 11 current-limiting resistance (R15), the 12 current-limiting resistance (R17), first fly-wheel diode (D1), second fly-wheel diode (D2), the 3rd fly-wheel diode (D3), the 4th fly-wheel diode (D7), the first protection triode (Q1), the second protection triode (Q2), the 3rd protection triode (Q3), the 4th protection triode (Q4), binding post (CON3); Touch-screen D is by first pull-up resistor (R1), second pull-up resistor (R2), the 3rd pull-up resistor (R3), the 4th pull-up resistor (R4); Backlight E is made of (CON4) backlight, first current-limiting resistance (R5), second current-limiting resistance (R6), the 3rd current-limiting resistance (R7), the 4th current-limiting resistance (R8), the 6th current-limiting resistance (R10), the 7th current-limiting resistance (R11), the 8th current-limiting resistance (R12), the 9th current-limiting resistance (R13); It is characterized in that: by first filter capacitor (C2) filtering, exported by switch transformer (T1) by peak absorbance diode (D4), (R16), (C3) peak absorbance through (B1) rectification for AC; One the tunnel through first filtered diode (D5), obtain+12V after second filter capacitor (C4) filtering, respectively with first fly-wheel diode (D1), second fly-wheel diode (D2), the 3rd fly-wheel diode (D3), the negative pole of the 4th fly-wheel diode (D7) is connected with relay coil 1, another road second filtered diode (D8), obtain after the 3rd filter capacitor (C5) filtering+5V and logic control chip (U1) the 4th pin, the 14th pin and first pull-up resistor (R1), second pull-up resistor (R2), the 3rd pull-up resistor (R3), the 4th pull-up resistor (R4), first current-limiting resistance (R5), second current-limiting resistance (R6), the 3rd current-limiting resistance (R7), the 4th current-limiting resistance (R8) end connects, one the tunnel through first divider resistance (R19), second divider resistance (R20), take out identification voltage after the dividing potential drop, return the light idol (SO1) of feeding by returning feed appearance (C8), and by accurate pressurizer (U4) voltage stabilizing, deliver to switch control chip (U3) by the output of light idol again, voltage after (U3) alignment is delivered to switch transformer (T1), makes the voltage of output more stable; Logic control chip (U1) the 10th pin; the 11st pin; the 12nd pin; the 13rd pin respectively with the 5th current-limiting resistance (R9); the tenth current-limiting resistance (R14); the 11 current-limiting resistance (R15); one end of the 12 current-limiting resistance (R17) connects; the other end is protected triode (Q1) with first respectively; the second protection triode (Q2); the 3rd protection triode (Q3); the 4th protection triode (Q4) connects; the 6th pin; the 7th pin; the 8th pin; the 9th pin respectively with (LED4); (LED3); (LED2); (LED1) connect; the 17th pin; the 18th pin; the 1st pin; the 2nd pin and first pull-up resistor (R1); second pull-up resistor (R2); the 3rd pull-up resistor (R3); the 4th pull-up resistor (R4) end connects, and crystal oscillator (Y1) end is connected the other end and is connected with (U1) the 16th pin with (U1) the 15th pin.