CN104991499A - Passive wall-mounted switch - Google Patents

Abstract

The invention discloses a passive wall switch, which comprises a switch signal transmitter sealed and installed in a switch box of a wall panel, and a switch actuator connected in series with a power supply line of an electrical appliance for receiving signals from the switch signal transmitter; the switch signal transmitter It includes a piezoelectric ceramic power supply, the output end of the piezoelectric ceramic power supply is respectively connected to the band-pass filter and the input end of the electric energy conversion collection circuit; the output end of the electric energy conversion collection circuit is connected to the input end of the energy storage capacitor, and the output end of the band-pass filter is connected to the second The signal input terminal of the single-chip microcomputer is connected; the output control terminal of the second single-chip computer is connected with the input control terminal of the radio frequency transmitter; The input end is connected with an eight-bit address encoder. The invention has the advantages of improving the reliability of use, and does not need wiring operation during installation, especially when used in places such as bathrooms and kitchens, the advantages are more prominent.

Description

passive wall switch

technical field

The present invention relates to a wire-free wall switch, and more particularly to a passive wall switch.

Background technique

Traditional wall switches are mostly used to control indoor lighting and low-power electrical equipment. During installation, at least one wire needs to be introduced from the load end into the wall switch box for switching on and off the load current control. Its shortcomings are: 1. It is necessary to carry out a wiring groove from the load end to the switch position, and the installation and construction work is relatively large; 2. When it is installed in a place where there is water in the kitchen or bathroom, it is easy to cause electric shock accidents due to water ingress; 3. If it is necessary to change the When the switch is on the wall, rewiring is required, which is a lot of work. However, the existing commercially available wireless wall switches have relatively complex structures, high manufacturing costs, and the use of batteries for power supply also reduces reliability, and battery replacement and maintenance are relatively troublesome.

Contents of the invention

The purpose of the present invention is to provide a simple and compact passive wall switch.

To achieve the above object, the present invention takes the following technical solutions:

The passive wall switch of the present invention includes a switch signal transmitter sealed and installed in the switch box of the wall panel, and connected in series with a switch actuator for receiving the signal of the switch signal transmitter in the electrical power line; the switch The actuator is composed of a first single-chip microcomputer, a radio frequency receiver connected to the control signal input end of the first single-chip microcomputer, an eight-bit address decoder connected to the data input end of the first single-chip microcomputer, and a power supply relay connected to the control output end of the first single-chip microcomputer;

The switch signal transmitter includes: a piezoelectric ceramic power supply, the output end of the piezoelectric ceramic power supply is respectively connected to the bandpass filter and the input end of the electric energy conversion collection circuit; the output end of the electric energy conversion collection circuit is connected to the input end of the energy storage capacitor connected, the output end of the band-pass filter is connected to the signal input end of the second single-chip microcomputer; the output control end of the second single-chip microcomputer is connected to the input control end of the radio frequency transmitter; the output end of the energy storage capacitor is respectively connected to the Described radio frequency transmitter, the power supply input end connection of the second single-chip microcomputer, are connected with eight address encoders at the second single-chip microcomputer data input end;

The piezoelectric ceramic power supply includes a power supply positive plate and a power supply negative plate. At least one spherical conductive contact is respectively arranged on the left and right plates of the power supply positive plate, and the power supply negative plate is arranged on the left and right sides of the power supply positive plate. Two pieces on the right side, the left and right power supply negative plates facing the positive plate of the power supply are all provided with piezoelectric ceramic wafers, and the left and right piezoelectric ceramic wafers are respectively connected to the corresponding plates of the power supply positive plate. The ball-shaped conductive contacts on the power supply are in contact with each other, and the other side of one of the negative plates of the power supply is fixedly connected to the insulating rubber pad; there are positive and negative lead wires electrically connected to the positive plate of the power supply and the negative plates of the left and right power supplies respectively;

The wall panel switch box includes a box body with rocker buttons, and a partition is arranged in the box body, and the partition board divides the box inner cavity into a key operation room and a sealed installation room, and the switch signal transmitter is installed In the sealing installation room; a window is opened on the surface of the partition, and the window is sealed and covered with an elastic film; the inner surface of the rocker button is located on the rocker shaft, and the lower is respectively provided with an upper An impact contact and a lower impact contact, the upper and lower impact contacts are located on one side of the window.

The electric energy conversion and collection circuit is composed of a step-down transformer and a rectification and limiting circuit. The primary winding of the step-down transformer is connected to the output end of the micro-electromagnetic power supply, and its secondary winding is connected to the input end of the rectification and limiting circuit. The rectification and limiting circuit The output terminal of the amplitude circuit is connected with the input terminal of the energy storage capacitor.

The advantage of the present invention is that the piezoelectric effect of piezoelectric ceramics is used as the power supply of the wall switch, so the use process does not need to replace the power supply like the existing wireless remote control switch, which improves the reliability of use; at the same time, the structure is simple and compact, which is convenient for wall installation. It does not require wiring operation, especially for bathrooms, kitchens and other places, its advantages are more prominent.

Description of drawings

Fig. 1 is a schematic diagram of an axonometric assembly of the present invention.

Fig. 2 is a schematic diagram of an axonometric three-dimensional structure of the present invention.

Fig. 3 is a schematic structural diagram of the piezoelectric ceramic power supply of the present invention.

Fig. 4 is a schematic perspective view of the three-dimensional structure of the piezoelectric ceramic power supply according to the present invention.

Fig. 5 is a schematic structural view of the wall panel switch box of the present invention.

Fig. 6 is a block diagram of the circuit principle of the switch signal transmitter of the present invention.

Fig. 7 is a functional block diagram of the electric energy conversion collection circuit of the present invention

Fig. 8 is a schematic block diagram of the circuit of the switch actuator of the present invention.

Detailed ways

As shown in Figures 1 and 8, the passive wall switch of the present invention includes a switch signal transmitter 1 sealed and installed in the wall panel switch box, which is connected in series with the AC 220V power line of the consumer RL for receiving the The switch executor of switch signal transmitter 1 signal; The switch executor consists of the first single-chip microcomputer, the 433H _Z radio frequency receiver connected to the control signal input end of the first single-chip microcomputer, and the eight-bit address connected to the first single-chip computer data input end A decoder and a power relay connected to the control output of the first single-chip microcomputer are formed;

Described switch signal transmitter 1 as shown in Figure 1, 6, comprises piezoelectric ceramic power supply 2, and described piezoelectric ceramic power supply 2 output ends are connected with band-pass filter and electric energy conversion collection circuit input end respectively; Said electric energy conversion The output end of the collecting circuit is connected with the input end of the energy storage capacitor, and the output end of the bandpass filter is connected with the signal input end of the second single-chip microcomputer; the output control end of the second single-chip microcomputer is connected with the input control end of the 433H _Z radio frequency transmitter; the said The output end of the energy storage capacitor is respectively connected to the power input end of the 433H _Z radio frequency transmitter and the second single-chip microcomputer through a voltage stabilizing circuit, and an eight-bit address encoder is connected to the data input end of the second single-chip microcomputer.

Described piezoelectric ceramic power supply 2 as shown in Figure 3, 4, comprises power positive pole plate 3 and is arranged on two power supply negative pole plates 4,5 on the left and right sides of power supply positive pole plate 3, left and right of power supply positive pole plate 3 Four spherical conductive contacts 6, 7 are evenly distributed on the board respectively, and the left and right power supply negative plates 4, 5 are all provided with piezoelectric ceramic wafers 8, 9 on the side plates facing the power supply positive plate 3, left and right Piezoelectric ceramic wafers 8, 9 are respectively in contact with spherical conductive contacts 6, 7 on the corresponding plate surface of the positive plate 3 of the power supply, and the other side plate surface of the negative plate 4 of the left power supply is fixedly connected on the insulating rubber pad 10; The positive plate 3 and the negative plates 4 and 5 of the left and right power supplies are respectively electrically connected with positive and negative lead wires 11 and 12, which are coated on the outside of the unit formed by the positive plate 3 of the power supply and the negative plates 4 and 5 of the left and right power supplies. Epoxy resin insulating layer 13 is arranged to facilitate fixed installation.

Described wall panel switch box as shown in Figure 1, 2, 5, comprises the box body 15 that has seesaw button 14, is provided with dividing plate 16 in described box body 15, and dividing plate 16 divides box body 15 inner cavities It is a button operating room 17 and a sealed installation room 18, and the switch signal transmitter 1 is installed in the sealed installation room 18; a window is provided on the plate surface of the partition 16, and the window seal is covered with an elastic film 19; the inside of the rocker button 14 An upper impact contact 21 and a lower impact contact 22 are respectively arranged on the upper and lower positions of the seesaw rotating shaft 20 on the board, and the upper and lower impact contacts 21 and 22 are located on the side facing the window.

The working principle of the present invention is briefly described as follows:

The piezoelectric ceramic power supply 2 of the present invention relies on the mechanical force of pressing the rocker button 14, and impacts the negative plate 5 of the power supply through the upper impact contact 21 or the lower impact contact 22 to exert pressure on the left and right piezoelectric ceramic wafers 8 and 9 , so as to convert the instantaneous mechanical movement into a pulse voltage. The pulse voltage is divided into two outputs for one or more oscillating pulses. One output is converted into a voltage between 5V-10V and stored in the energy storage after sorting out the electric energy conversion and collection circuit. In the capacitor, the voltage of 5V is output by the voltage stabilizing circuit for the second single-chip microcomputer and 433H _Z RF transmitter to work. This electric energy supports the whole circuit to work for 20ms, and supports the second single-chip microcomputer to control the 433H _Z RF transmitter to send a radio frequency control signal during this period. ; The other way extracts a single pulse voltage signal through the band-pass filter, and this pulse voltage signal enters the signal input terminal of the second microcontroller and is identified as a trigger signal, which drives the 433H _Z radio frequency transmitter to send once through frequency modulation. It cannot be distinguished as on or off (on or off emits the same signal), so the trigger signal is sent out through the 433H _Z RF transmitter, so that the state of the switch actuator is reversed once, that is, the switch actuator is changed from the original Switch from open to closed or switch from closed to open, so as to control the on and off working state of the normally open contact of the power relay.

The 8-bit address coder is used to set the address coding state corresponding to the switch actuator one by one, and this code is read and saved by the first single-chip microcomputer. Each time the trigger signal is sent, it has this address code for the 8-bit address decoder of the switch actuator to compare, so as to ensure that when multiple wall switches are in one space, they can work at the same time without interference. Up to 256 different switching actuators can be distinguished by an 8-bit address encoder.

Claims (2)

1. a passive switch on wall, comprises the switch signal transmitters be seal-installed in wall panel switch enclosure, is series in electrical appliance power circuit for receiving the switch actuator of described switch signal transmitters signal; Described switch actuator is made up of the first single-chip microcomputer, the radio frequency receiver being connected to described first Single-chip Controlling signal input part and the eight bit address demoders being connected to the first single-chip data input end and the power supply relay that is connected to the first Single-chip Controlling output terminal; It is characterized in that:

Described switch signal transmitters comprises: piezoelectric ceramics power supply, and described piezoelectric ceramics power supply output terminal is connected with bandpass filter and electric energy conversion collecting circuit input end respectively; Described electric energy conversion collecting circuit output terminal is connected with storage capacitor input end, and described bandpass filter output terminal is connected with second singlechip signal input part; Described second singlechip output control terminal is connected with radiofrequency launcher input control end; Described storage capacitor output terminal is connected with the power input of described radiofrequency launcher, second singlechip respectively by mu balanced circuit, is connected with eight bit address scramblers at second singlechip data input pin;

Described piezoelectric ceramics power supply comprises positive source plate and power-pole plate, the left and right plate face of described positive source plate is respectively arranged with at least one spherical conductive contact, described power-pole plate is two pieces that are arranged on positive source plate arranged on left and right sides, described left and right power-pole plate is provided with piezoelectric ceramic wafer towards the side plate face of positive source plate, described left and right piezoelectric ceramic wafer contacts with the spherical conductive contact on positive source plate respective panels face respectively, and wherein another lateral plates of a block power supply negative plate is connected on electro-insulating rubber pad; On positive source plate and left and right power-pole plate, electrical connection has positive and negative electrode to draw wire respectively;

Described wall panel switch enclosure comprises the box body with seesaw button, is provided with dividing plate in described box body, and box body inner chamber is divided into button operation room and sealing installation room by described dividing plate, and described switch signal transmitters is installed in described sealing installation room; The plate face of described dividing plate offers window, and described window aperture seal is coated with elastic film; The inner plate surface of described seesaw button is positioned at seesaw rotating shaft is upper and lower is respectively arranged with shock contact and lower shock contact, described upper and lower shock contact is positioned at the side of described window.

2. micro-electromagnetic power source switch on wall according to claim 1, it is characterized in that: described electric energy conversion collecting circuit is made up of step-down transformer and rectification amplitude limiter circuit, described step-down transformer armature winding is connected with described micro-electromagnetic power source output terminal, its secondary winding is connected with rectification amplitude limiter circuit input end, and described rectification amplitude limiter circuit output terminal is connected with described storage capacitor input end.