CN212668890U

CN212668890U - Non-contact mechanical composite button of capacitor

Info

Publication number: CN212668890U
Application number: CN202021304329.4U
Authority: CN
Inventors: 张南南
Original assignee: Cedes Changshu Sensor Co Ltd
Current assignee: Cedes Changshu Sensor Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-09
Anticipated expiration: 2030-07-06

Abstract

A non-contact mechanical composite button of a capacitor belongs to the technical field of capacitance sensing. The touch screen comprises a shell, a circuit board accommodated in a shell cavity of the shell, a mechanical switch installed in the middle of the circuit board, a button panel arranged on the front side of the shell and used in cooperation with the mechanical switch, and a back plate arranged on the back side of the shell and used for sealing the shell cavity. The advantages are that: cross infection caused by button contact among passengers can be avoided, and public health conditions in the use process of the elevator can be improved; when the non-contact triggering function of the button based on the capacitive sensing technology fails in a special environment, the standby scheme of mechanical pressing can be directly carried out, and the original use habit of passengers is continued.

Description

Non-contact mechanical composite button of capacitor

Technical Field

The utility model belongs to the technical field of the electric capacity sensing, concretely relates to electric capacity non-contact mechanical composite button.

Background

With the continuous emergence of high-rise buildings, the elevator is used as a vertical transportation tool in the high-rise buildings, and great convenience is brought to people for going out. The elevator is a microcomputer-controlled intelligent and automatic device, and does not need to be operated by a special person, and when a passenger takes the elevator, the passenger can select a corresponding button according to the situation to complete the setting operations such as floor selection, door opening and closing and the like. However, the operation buttons of the existing elevator are all contact type, namely, the fingers of passengers must touch the buttons to control the operation of the elevator. Due to the limitation of building space, elevator cars are usually narrow and relatively closed, and are prone to high-incidence places where bacteria or viruses are bred due to unsmooth air flow. Particularly, the elevator buttons are contacted by countless passengers every day, the use frequency is high, the elevator buttons are easy to become carriers for transmitting pathogenic bacteria, the passengers are possibly cross-infected by the pathogenic bacteria on the buttons, and the public health is not facilitated. Because the elevator does not have the function of screening virus infectors, in order to avoid cross infection caused by button contact, passengers need to carry out button operation by self-provided disposable gloves or paper towels, and great inconvenience is brought to daily travel.

In view of the above-mentioned prior art, there is a need for an improvement of the structure of the existing elevator push-button, for which reason the applicant has made an advantageous design, and the solution to be described below has been created in this context.

Disclosure of Invention

An object of the utility model is to provide an electric capacity non-contact machinery composite button, simple structure is reasonable, and the operation precision is high and the good reliability.

The utility model aims at reaching like this, a compound button of electric capacity non-contact machinery, including the shell, hold the circuit board in the shell cavity, install mechanical switch in the middle of the circuit board, set up at the shell openly with the button panel that mechanical switch cooperation was used and set up and carry out confined backplate, its characterized in that to the shell cavity at the shell dorsal part: the button panel is provided with a through hole at the position right facing the capacitor chip, and the capacitor chip monitors whether a finger approaches the capacitor chip through the through hole.

In a specific embodiment of the present invention, the switch further comprises a balance plate, and the balance plate is disposed between the mechanical switch and the button panel.

In another specific embodiment of the present invention, the button panel forms a boss at the periphery, and the housing is provided with a limit step on the inner side wall for limiting the displacement of the button panel by the cooperation of the boss and the stop.

The utility model discloses a still another concrete embodiment, the circuit board on still be equipped with host system and output module, host system be connected with capacitor chip and output module electricity respectively, the object is close to the capacitor chip and can arouse the change of capacitor chip capacity value, capacitor chip turns into voltage signal with electric capacity signal and transmits for host system, host system pass through the break-make of output module control elevator external circuit.

The utility model discloses a still another concrete embodiment, output module include resistance R1, resistance R2, resistance R3 and opto-coupler TL, the opto-coupler TL adopt BL817S, 1 foot connecting resistance R1's one end of opto-coupler TL, main control module is connected to resistance R1's the other end, 3 foot connecting resistance R2's of opto-coupler TL one end, resistance R2's the other end is connected and constitutes the elevator circuit jointly with resistance R3's one end output, resistance R3's the other end is connected mechanical switch's one end, mechanical switch's the other end is connected and constitutes another output of circuit jointly with 4 feet of opto-coupler TL and is connected the elevator circuit, 2 feet ground connection of opto-coupler TL.

The utility model discloses in still a concrete embodiment, the circuit board on still be equipped with CAN communication module, host system be connected with host computer communication through this CAN communication module.

The utility model discloses a and then a concrete embodiment, the circuit board on still be equipped with power module, power module be used for master control module and electric capacity chip supply power.

The utility model discloses owing to adopted above-mentioned structure, whether detect through electric capacity chip whether have the passenger finger to be close to realize that the non-contact of elevator button triggers, compare with prior art, the beneficial effect who has is: cross infection caused by button contact among passengers can be avoided, and public health conditions in the use process of the elevator can be improved; when the non-contact triggering function of the button based on the capacitive sensing technology fails in a special environment, the standby scheme of mechanical pressing can be directly carried out, and the original use habit of passengers is continued; the whole structure is simple and reasonable, the realization is convenient, the detection precision is high, and the reliability is strong.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an electrical connection diagram of the present invention.

In the figure: 1. a shell, 11, a limit step; 2. a circuit board; 3. a mechanical switch; 4. button panel, 41 through hole, 42 boss; 5. a back plate; 6. a capacitor chip; 7. and a balance plate.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

Referring to fig. 1, the utility model relates to a non-contact mechanical composite button of electric capacity, install on elevator floor button position, including shell 1, circuit board 2, mechanical switch 3, button panel 4, backplate 5, electric capacity chip 6 and balance plate 7. The circuit board 2 is accommodated in the housing cavity of the housing 1, and the mechanical switch 3 is mounted in the middle of the circuit board 2. The button panel 4 is arranged on the front surface of the shell 1 and is matched with the mechanical switch 3 for use. The button panel 4 is provided with a boss 42 at the peripheral edge, and the inner side wall of the shell 1 is provided with a limit step 11 which is matched with the boss 42 in a stopping way to limit the displacement of the button panel 4. The balance plate 7 is arranged between the mechanical switch 3 and the button panel 4 and used for improving the hand feeling of pressing the mechanical switch 3. The back plate 5 is arranged on the back side of the shell 1 to seal the shell cavity. The capacitor chip 6 is mounted on the circuit board 2, the button panel 4 is provided with a through hole 41 at a position opposite to the capacitor chip 6, and the capacitor chip 6 monitors whether a finger approaches the through hole 41. When a finger of a passenger approaches the small hole, the finger approaches the capacitor chip 6, which causes the capacitance of the capacitor chip 6 to change.

Referring to fig. 2, the circuit board 2 is further provided with a main control module, an output module, a CAN communication module, and a power module. The main control module is respectively and electrically connected with the capacitor chip 6, the output module and the CAN communication module. The output module include resistance R1, resistance R2, resistance R3 and opto-coupler TL, opto-coupler TL adopt BL 817S. The one end of 1 foot connecting resistance R1 of opto-coupler TL, main control module is connected to resistance R1's the other end, 3 feet connecting resistance R2's of opto-coupler TL one end, resistance R2's the other end is connected and constitutes an output of circuit jointly with resistance R3's one end, resistance R3's the other end is connected mechanical switch 3 (mark as K on the picture) one end, mechanical switch 3's the other end is connected and constitutes another output of circuit jointly with 4 feet of opto-coupler TL. Two output ends of the output module are electrically connected with an elevator control system. The main control module comprises a main control chip IC1, a capacitor C1, a capacitor C2, a capacitor C3 and a resistor R4, wherein the main control chip IC1 adopts STM32F042F6P6, a pin 1 of the main control chip IC1 is connected with one end of the capacitor C3 and one end of the resistor R4, and a pin 5 of the main control chip IC1 is connected with one end of the capacitor C1. The main control chip IC1 has 12 pins connected to the output module, 18 pins connected to the

capacitor chips

6, 19 pins and 20 pins connected to the CAN communication module, and the CAN communication module is connected to the upper computer for data exchange with the main control chip IC1 and control the main control chip IC 1. The pin 6 of the main control chip IC1, one end of the capacitor C2 and the other end of the resistor R4 are connected with a direct current power supply, and the other end of the capacitor C1, the other end of the capacitor C2, the other end of the capacitor C3 and the pin 4 of the main control chip IC1 are grounded. In the present embodiment, the capacitor chip 6 is a product already on the market, and further description of the structure thereof is omitted.

Further, the power module includes a diode D1, a diode D2, a resistor R5, a resistor R6, a capacitor C4, a capacitor C5, a light emitting diode LED1, and a voltage stabilizing chip IC2, and is configured to provide a stable dc power for the main control module and the capacitor chip 6. The LED1 is a power indicator.

When a passenger finger approaches the through hole 41, the finger approaches the capacitor chip 6, which may cause a change in capacitance of the capacitor chip 6, and the capacitor chip 6 converts the capacitance signal into a voltage signal and transmits the voltage signal to the main control chip IC 1. The main control chip IC1 controls the on-off of the elevator external circuit through the output module. Through practical verification, when a finger presses a button on a certain floor, the button is triggered when the finger is 10-20 mm away from the button. If the fingers of the passenger approach to each other, and the capacitance chip 6 does not respond or the main control chip IC1 does not respond, so that the fingers directly contact the mechanical switch 3, the on-off of the external circuit can be controlled by closing the mechanical switch 3, and the original use habit of the passenger can be continued.

Claims

1. The utility model provides a compound button of electric capacity non-contact machinery, includes shell (1), holds circuit board (2) in shell (1) shell intracavity, installs mechanical switch (3) in the middle of circuit board (2), sets up button panel (4) and setting that openly use with mechanical switch (3) cooperation in shell (1) and carries out confined backplate (5), its characterized in that to the shell chamber at shell (1) dorsal part: the touch screen is characterized by further comprising a capacitor chip (6) arranged on the circuit board (2), a through hole (41) is formed in the position, right opposite to the capacitor chip (6), of the button panel (4), and whether a finger approaches the capacitor chip (6) or not is monitored through the through hole (41).

2. Capacitive contactless mechanical compound button according to claim 1, characterized by further comprising a balancing plate (7), said balancing plate (7) being arranged between the mechanical switch (3) and the button panel (4).

3. The capacitive non-contact mechanical composite button according to claim 1, wherein the button panel (4) has a protrusion (42) formed at the peripheral edge, and the inner sidewall of the housing (1) is provided with a limiting step (11) engaged with the protrusion (42) to limit the displacement of the button panel (4).

4. The capacitive non-contact mechanical compound button according to claim 1, wherein the circuit board (2) further comprises a main control module and an output module, the main control module is electrically connected to the capacitive chip (6) and the output module, respectively, when an object approaches the capacitive chip (6), a capacitance value of the capacitive chip (6) is changed, the capacitive chip (6) converts a capacitance signal into a voltage signal and transmits the voltage signal to the main control module, and the main control module controls the connection and disconnection of an elevator circuit through the output module.

5. A non-contact mechanical composite button of a capacitor as claimed in claim 4, wherein the output module comprises a resistor R1, a resistor R2, a resistor R3 and an optocoupler TL, the optocoupler TL adopts BL817S, 1 pin of the optocoupler TL is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the main control module, 3 pins of the optocoupler TL are connected with one end of a resistor R2, the other end of the resistor R2 is connected with one end of the resistor R3 and jointly forms an output end of the circuit to be connected with the elevator line, the other end of the resistor R3 is connected with one end of the mechanical switch (3), the other end of the mechanical switch (3) is connected with 4 pins of the optocoupler TL and jointly forms another output end of the circuit to be connected with the elevator line, and 2 pins of the optocoupler TL.

6. The capacitive non-contact mechanical compound button according to claim 4, wherein the circuit board (2) is further provided with a CAN communication module, and the main control module is in communication connection with an upper computer through the CAN communication module.

7. The capacitive non-contact mechanical compound button according to claim 4, wherein a power module is further disposed on the circuit board (2), and the power module is used for supplying power to the main control module and the capacitive chip (6).