CN214896232U - Countdown timer - Google Patents

Abstract

The utility model discloses a countdown timer, which comprises a shell, a display module arranged at the front side of the shell, a key module arranged at the rear side of the shell and a circuit board arranged in the shell, wherein a main control module is arranged on the circuit board; still including setting up in the human response module of casing front side, human response module is used for detecting the human response signal of predetermineeing the within range and sends to host system, and host system opens or closes display module according to human response signal. When the security guard needs to go out, the countdown timer provided by the utility model can make the visitor know the working state and the return time of the security guard, thereby providing convenience for the visitor; the human body induction module is used for lighting the display screen when a visitor is available and enabling the display screen to be dormant when no visitor is available, so that energy is saved and cost is reduced; and the structure is simple, the hardware cost is lower, and the practicability is strong.

Description

Countdown timer

Technical Field

The utility model relates to an electronic timer technical field, concretely relates to countdown timer.

Background

The school security office usually adopts a shift system, and one person needs to do a lot of things and register and open a door for the coming visitor at the door irregularly; patrolling and checking campus security; eating, fetching water, going to the toilet, etc. If a visitor enters the campus when the visitor patrols, the visitor does not know what the security guard does and does, and does not know what the security guard returns, even the security guard can mistakenly steal and leave the post. Although the gate of the security guard room is provided with a signboard of the security guard on duty, the signboard has the name and the telephone of the security guard on duty on the same day, but the security guard on duty on the same day often forgets to change the name into the own card. Therefore, when the security guard is not in the security room at the door, the visitor can wait for the security guard endlessly, and the waiting for the unknown time causes inconvenience and anxiety to the visitor.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a countdown timer, its aim at make the visitor know the operating condition of security personnel and the time of returning, facilitate for the visitor.

The utility model provides a countdown timer, which comprises a shell, a display module arranged at the front side of the shell, a key module arranged at the rear side of the shell and a circuit board arranged in the shell, wherein a main control module is arranged on the circuit board; the key module comprises a plurality of countdown keys, and each countdown key corresponds to a different name and a different countdown time; the countdown key is closed to generate a countdown signal and send the countdown signal to the main control module, and the main control module sends the corresponding name and countdown time to the display module according to the countdown signal;

still including setting up in the human response module of casing front side, human response module is used for detecting the human response signal of predetermineeing the within range and sends to host system, and host system opens or closes display module according to human response signal.

Preferably, still install the vocal warning module on the circuit board, host system controls the vocal warning module sound production or not sound according to human response signal.

Preferably, the sounding reminding module comprises a buzzer, and the buzzer is electrically connected with the main control module.

Preferably, the display lamp module is arranged on the rear side of the shell and is electrically connected with the main control module; the display lamp module comprises a plurality of display lamps, the display lamps correspond to the countdown keys one to one, and the display lamps are arranged above the corresponding countdown keys.

Preferably, the display module further comprises a zero clearing key arranged on the rear side of the shell, the zero clearing key is closed to generate a zero clearing signal and send the zero clearing signal to the main control module, and the main control module sends preset zero clearing data to the display module according to the zero clearing signal.

Preferably, the countdown key and the clear key both adopt pop-up switches.

Preferably, the key module comprises 4 countdown keys, and the names corresponding to the 4 countdown keys are patrol, floor sweeping, toilet getting and water getting and meal getting respectively.

Preferably, the human body sensing module is a human body sensor which senses a human body sensing signal by using an infrared sensing technology.

Preferably, the main control module adopts a microcontroller board with the model number of ATmega 328P.

Preferably, the display module adopts a display screen with the model of LCD 1602.

The utility model has the advantages that:

(1) when the security guard needs to go out, the visitor can know the working state and the return time of the security guard, and convenience is provided for the visitor;

(2) the human body induction module is used for lighting the display screen when a visitor is available and enabling the display screen to be dormant when no visitor is available, so that energy is saved and cost is reduced;

(3) the voice reminding module is included to remind the visitor of paying attention to the countdown timer, and the voice reminding module is more humanized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

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

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1, the embodiment of the utility model provides a countdown timer, including the casing, set up in the display module of casing front side, set up in the button module of casing rear side and set up the circuit board in the casing, install host system on the circuit board. The key module comprises a plurality of countdown keys, and each countdown key corresponds to a different name and a different countdown time. The countdown keys are closed to generate countdown signals and send the countdown signals to the main control module, and the main control module sends the corresponding names and the countdown time to the display module according to the countdown signals. Still including setting up in the human response module of casing front side, human response module is used for detecting the human response signal of predetermineeing the within range and sends to host system, and host system opens or closes display module according to human response signal. The human body sensing module is a human body sensor which senses a human body sensing signal by adopting an infrared sensing technology, the main control module is a microcontroller board with the model of ATmega328P, and the display module is a display screen with the model of LCD 1602.

In this embodiment, the countdown timer still includes the pronunciation warning module, and host system reminds the module sound production or does not sound according to human response signal control pronunciation, and buzzer can be chooseed for use to the countdown timer, when the visitor is close to, probably can not see the countdown timer at the very first time, and at this moment, the pronunciation reminds the module and sends the sound of dripping and remind, arouses visitor's attention to make the visitor pay close attention to the countdown timer.

In this embodiment, the countdown timer is still including setting up in the display lamp module of casing rear side, and the display lamp module includes a plurality of display lamps, display lamp and countdown button one-to-one electric connection, and the display lamp setting is in the top of the countdown button that corresponds. In this embodiment, the key module includes 4 count-down keys, and the names corresponding to the 4 count-down keys are respectively patrol, sweep, go to the toilet, and take water and meal, and in other embodiments, the number of the count-down keys, the corresponding names, and the corresponding count-down times can be set according to actual needs.

The countdown timer also comprises a zero clearing key arranged at the rear side of the shell, the zero clearing key is closed to generate a zero clearing signal and send the zero clearing signal to the main control module, and the main control module sends preset zero clearing data to the display module according to the zero clearing signal. The countdown button and the clear button are both of bounce switches.

The countdown timer also includes a power module, which includes a dry battery or a battery.

When the security guard goes to patrol, the corresponding display lamp is lightened by pressing the patrol countdown key, and the main control module sends the corresponding countdown time and name (patrol) to the display screen. If the human body sensor does not detect the visitor at the moment, the display screen is in a black screen state. Although the display screen is in the black screen state, the countdown is in the normal count state. The security guard patrols according to a plan, when a visitor approaches, the human body sensor detects the visitor, the main control module controls the display screen to be lightened, the display screen displays countdown numbers and a patrol word, the buzzer sounds to remind the visitor, the visitor pays attention to the countdown timer, the security guard goes out to patrol and knows the predicted return time of the security guard, and the visitor can reasonably arrange own time according to the countdown timer. And when the security guard returns to the security room, the clear button is pressed, the main control module sends preset display data to the display module according to the clear signal, the display data comprise countdown time 0 and a null name, and the main control module also extinguishes a display lamp corresponding to the patrol countdown button according to the clear signal. The countdown timer further includes a power switch through which the countdown timer is turned off when the countdown timer is not needed for a long time.

When the security guard needs to go out, the countdown timer provided by the embodiment can enable a visitor to know the working state of the security guard and the expected return time, so that convenience is provided for the visitor; the embodiment comprises a human body induction module, wherein the display screen is lightened when a visitor comes, and the display screen is dormant when no visitor comes, so that the energy is saved, and the cost is reduced; the voice reminding module is used for reminding a visitor of paying attention to the countdown timer, so that the system is more humanized; and the embodiment has simple structure, lower hardware cost and strong practicability.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. A countdown timer, comprising: the keyboard comprises a shell, a display module arranged on the front side of the shell, a key module arranged on the rear side of the shell and a circuit board arranged in the shell, wherein a main control module is arranged on the circuit board; the key module comprises a plurality of countdown keys, and each countdown key corresponds to a different name and a different countdown time; the countdown key is closed to generate a countdown signal and send the countdown signal to the main control module, and the main control module sends the corresponding name and countdown time to the display module according to the countdown signal;

still including setting up in the human response module of casing front side, human response module is used for detecting the human response signal of predetermineeing the within range and sends to host system, and host system opens or closes display module according to human response signal.

2. A countdown timer as defined in claim 1 wherein: still install the vocal warning module on the circuit board, host system controls the vocal warning module sound production or does not sound according to human body sensing signal.

3. A countdown timer according to claim 2, wherein: the sounding reminding module comprises a buzzer, and the buzzer is electrically connected with the main control module.

4. A countdown timer according to claim 3, wherein: the display lamp module is arranged on the rear side of the shell and is electrically connected with the main control module; the display lamp module comprises a plurality of display lamps, the display lamps correspond to the countdown keys one to one, and the display lamps are arranged above the corresponding countdown keys.

5. A countdown timer according to claim 4, wherein: the display module is characterized by further comprising a zero clearing key arranged on the rear side of the shell, the zero clearing key is closed to generate a zero clearing signal and send the zero clearing signal to the main control module, and the main control module sends preset zero clearing data to the display module according to the zero clearing signal.

6. A countdown timer as defined in claim 5 wherein: the countdown key and the clear key both adopt a bounce switch.

7. A countdown timer according to claim 6, wherein: the key module includes 4 count-down button, the name that 4 count-down button correspond is respectively for patrol, sweep the floor, go to the lavatory, get water and get meal.

8. A countdown timer according to claim 7, wherein: the human body induction module is a human body inductor which adopts an infrared sensing technology to induce human body induction signals.

9. A countdown timer as defined in claim 8 wherein: the main control module adopts a microcontroller board with the model number of ATmega 328P.

10. A countdown timer according to claim 9, wherein: the display module adopts a display screen with the model of LCD 1602.

Images