CN219085488U

CN219085488U - Pressure trigger alarm

Info

Publication number: CN219085488U
Application number: CN202223261849.3U
Authority: CN
Inventors: 邬瑞东
Original assignee: Lanbang Technology Chengdu Group Co ltd
Current assignee: Lanbang Technology Chengdu Group Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-26
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a pressure trigger alarm, which mainly comprises a power module, a pressure trigger switch K2, a signal control circuit, a buzzer SP and a buzzer circuit, wherein the power end of the signal control circuit is connected with the power module, the output end of the signal control circuit is connected with the buzzer SP after passing through the buzzer circuit, and the pressure trigger switch K2 is connected in series with a circuit between the power end of the signal control circuit and the power module. The whole circuit has simple structure and low manufacturing cost. Meanwhile, due to the fact that the pressure trigger switch K2 is arranged, an alarm can be sent out only when the door of a residence or a hotel is opened and pressed to the pressure trigger switch K2, so that indoor users can be reminded, and the safety of resident personnel can be obviously improved.

Description

Pressure trigger alarm

Technical Field

The utility model relates to the field of safety theft prevention, in particular to a pressure trigger alarm.

Background

Currently, in order to increase the security of portals, protection devices such as door chains and mechanical door stoppers for preventing the doors from being illegally opened are appeared on the market. However, these door chains and mechanical door stoppers currently have only a single function of preventing the door from being opened, but do not have an alarm function, and in extreme cases, they do not give an alarm even if the door is opened. Therefore, these protection devices such as door chains and mechanical door stoppers cannot provide comprehensive protection functions, and have limited actions and effects, and cannot well meet the demands of various occasions.

Disclosure of Invention

The utility model aims to overcome the defects and provide a pressure trigger alarm which mainly comprises a power module, a pressure trigger switch K2, a signal control circuit, a buzzer SP and a buzzer circuit, wherein the power end of the signal control circuit is connected with the power module, the output end of the signal control circuit is connected with the buzzer SP after passing through the buzzer circuit, and the pressure trigger switch K2 is connected in series with a circuit between the power end of the signal control circuit and the power module.

In order to facilitate the integral opening and closing of the utility model, the power supply module is also provided with a power switch K1 for controlling the on-off of the power supply of the integral pressure trigger alarm, the input end of the power switch K1 is connected with the anode of the power supply module, and the output end of the power switch K1 is connected with the input end of the pressure trigger switch K2.

Further, the signal control circuit comprises a control chip U, a resistor R2 and a resistor R3, the No. 1 pin and the No. 4 pin of the control chip U are grounded, the input end of the pressure trigger switch K2 is connected with the positive electrode of the power module, the output end of the pressure trigger switch K2 is sequentially grounded after passing through the resistor R2 and the resistor R3, the No. 2 pin of the control chip U is connected with the connection point of the resistor R2 and the resistor R3, and the No. 3 pin and the No. 4 pin of the control chip U are connected with the buzzing circuit.

The buzzing circuit is composed of a triode VT1 and a three-pin boost inductor L, wherein the base electrode of the triode VT1 is connected with a No. 3 pin of the control chip U, the collector electrode of the triode VT1 is connected with a No. 4 pin of the control chip U, and the emitter electrode of the triode VT1 is connected with the initial pin of the three-pin boost inductor L; the common pin of the three-pin boost inductor L is connected with the pressure trigger switch K2 and is grounded after passing through the pressure trigger switch K2, the resistor R2 and the resistor R3 in sequence; the ending pin and the starting pin of the three-pin boosting inductor L are connected with the anode and the cathode of the buzzer SP.

In order to ensure that the utility model can work normally even if the pressure trigger switch K2 fails, a vibration switch circuit connected in parallel with the pressure trigger switch K2 is also arranged in the circuit.

The vibration switch circuit is a vibration switch SW-18015P spring vibration switch or an SW-520 angle inclination trigger switch.

In order to further ensure the reliability of the pressure trigger alarm, a silicon controlled circuit connected in parallel with the pressure trigger switch K2 is also arranged in the circuit of the pressure trigger alarm.

The silicon controlled rectifier circuit is composed of a silicon controlled diode Q1 and a resistor R1, wherein the anode of the silicon controlled diode Q1 is connected with the input end of the pressure trigger switch K2, the cathode of the silicon controlled diode Q1 is connected with the output end of the pressure trigger switch K2, and the resistor R1 is connected in series between the grid electrode and the cathode of the silicon controlled diode Q1.

For better implementation of the utility model, the control chip U is preferably implemented by CX55 integrated chip, AC3Y710 chip or AC3M01 chip. The pressure trigger switch K2 is realized by a mechanical push switch.

Compared with the prior art, the utility model has the following advantages:

(1) The whole circuit has simple structure and low manufacturing cost. Meanwhile, due to the fact that the pressure trigger switch K2 is arranged, an alarm can be sent out only when the door of a residence or a hotel is opened and pressed to the pressure trigger switch K2, so that indoor users can be reminded, and the safety of resident personnel can be obviously improved.

(2) The utility model has small volume, the pressure trigger switch K2 can be made into any shape, and the utility model is convenient to carry and has wide application range.

Drawings

FIG. 1 is a schematic diagram of a first circuit structure of the present utility model;

FIG. 2 is a schematic diagram of a second circuit structure according to the present utility model;

FIG. 3 is a schematic diagram of a third circuit structure according to the present utility model;

fig. 4 is a schematic diagram of a fourth circuit structure of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to examples, but embodiments of the present utility model are not limited thereto.

Example 1

As shown in fig. 1, the pressure trigger alarm of the utility model mainly comprises a power supply module, a pressure trigger switch K2, a signal control circuit, a buzzer SP and a buzzing circuit. The power module is used for providing working voltage VCC and working current for the signal control circuit, the buzzer SP and the buzzer circuit, and can be realized by adopting dry batteries, rechargeable batteries or other batteries with a power supply function. The power module is a very traditional and mature technology at present, and the description of this embodiment is omitted.

The signal control circuit is used for providing a control signal or control voltage for the buzzing circuit so that the buzzing device SP obtains working voltage and current through the buzzing circuit and achieves an alarm function.

The signal control circuit consists of a control chip U, a resistor R2 and a resistor R3, wherein the control chip U is preferably realized by adopting a CX55 integrated chip. The CX55 integrated chip is a single-tone alarm audio chip which is provided with 4 pins, wherein the pin 1 is a VSS pin and is used for grounding; the No. 2 pin is an ON/OFF pin and is used for an alarm switch button; the pin 3 is a BZ pin and is used for outputting audio pulse; the pin 4 is a VDD pin for providing an operating voltage. When the No. 2 pin is connected, the No. 3 pin BZ is at a high level, so that an alarm audio pulse is output; when the No. 2 pin is disconnected, the No. 3 pin BZ is at a low level, and no alarm audio pulse is output.

Alternatively, the control chip U may be implemented by other alarm control chips having similar functions, for example, an AC3Y710 chip or an AC3M01 chip may be used. When the alarm control chips are adopted for implementation, the alarm control chips are only required to be connected with the circuit according to corresponding prompts, which is a conventional technology for a person skilled in the art and is not described in detail herein.

The buzzing circuit is composed of a triode VT1 and a three-pin boosting inductor L. When the power supply is connected, the No. 1 pin and the No. 4 pin of the control chip U are grounded, the input end of the pressure trigger switch K2 is connected with the positive pole VCC of the power supply module, and the output end of the pressure trigger switch K2 is grounded after passing through the resistor R2 and the resistor R3 in sequence.

The base of the triode VT1 is connected with the No. 3 pin of the control chip U, the collector of the triode VT1 is connected with the No. 4 pin of the control chip U, and the emitter of the triode VT1 is connected with the initial pin of the three-pin boost inductor L.

The common pin of the three-pin boost inductor L is connected with the pressure trigger switch K2 and is grounded after passing through the pressure trigger switch K2, the resistor R2 and the resistor R3 in sequence. That is, after the current flowing from the pin 4 of the control chip U is amplified by the triode VT1, the current is grounded sequentially by the three-pin boost inductor L, the pressure trigger switch K2, the resistor R2 and the resistor R3 to form a circuit.

The ending leg and the starting leg of the three-leg boost inductor L are connected with the positive and negative poles of the buzzer SP, so that the buzzer SP can obtain proper working voltage and current from the three-leg boost inductor L.

In order to ensure that the buzzer SP is not affected by current, the utility model also connects a capacitor C1 in series between the No. 3 pin and the No. 4 pin of the control chip U, namely, the capacitor C1 is connected in series between the base electrode and the collector electrode of the triode VT 1.

The pressure trigger switch K2 is a mechanical push switch, i.e. it is a push switch. In practical use, the pressure trigger switch K2 needs to be arranged between the door and the door stopper, so that when the door is opened, the door can squeeze the pressure trigger switch K2, thereby enabling the whole circuit to be conducted and giving an alarm.

To facilitate the overall control of the present utility model, a power switch K1 may be provided on the power module. When the power switch K1 is connected, the input end of the power switch K1 is connected with the positive pole VCC of the power module, and the output end of the power switch K1 is connected with the input end of the pressure trigger switch K2, so that the whole circuit is in an open circuit state when the power switch K1 is disconnected.

The working principle of the utility model is that when the power switch K1 is turned on, the whole circuit is in a to-be-operated state. When the pressure trigger switch K2 is pressed or pushed, the power module, the power switch K1, the pressure trigger switch K2, the resistor R2 and the resistor R3 are electrically connected. The No. 2 pin of the control chip U is connected with the connection point of the resistor R2 and the resistor R3, so that the control chip U obtains working voltage, and the No. 1 pin of the control chip U is grounded, so that the control chip U is in a conducting working state. At this time, the 3-pin of the control chip U applies trigger voltage to the base electrode of the triode VT1, the triode VT1 is conducted, and the circuit flowing out of the 4-pin of the control chip U is amplified by the triode VT1 and then loaded on the three-pin boosting inductor L, so that the buzzer SP gives an alarm.

Example 2

As shown in fig. 2, in this embodiment 2, a vibration switch circuit is connected in parallel beside the pressure trigger switch K2 on the basis of embodiment 1, so as to ensure that when the pressure trigger switch K2 fails, only when the door is opened, vibration can be generated to the present utility model, and the circuit can be turned on, thereby realizing an alarm function.

The vibration switch circuit can be realized by a vibration switch SW-18015P spring vibration switch, a SW-520 angle inclination trigger switch or other switches with the same function.

Example 3

In order to further increase the reliability of the present utility model, a silicon controlled rectifier circuit may be added to the present embodiment based on embodiment 1 or embodiment 2. When the structure of the thyristor circuit is added to that of example 2, the structure thereof is shown in fig. 3, and when the thyristor circuit is added to that of example 1 only, the structure thereof is shown in fig. 4.

The thyristor circuit is composed of a thyristor diode Q1 and a resistor R1. When in connection, the anode of the silicon controlled diode Q1 is connected with the input end of the pressure trigger switch K2, the cathode of the silicon controlled diode Q1 is connected with the output end of the pressure trigger switch K2, and the resistor R1 is connected between the grid electrode and the cathode of the silicon controlled diode Q1 in series.

When the voltage trigger switch K2 or the vibration switch circuit is turned on, the trigger voltage of the silicon controlled diode Q1 can be obtained from the resistor R1, so that the silicon controlled diode Q1 is turned on, and the control chip U is in a working state.

As described above, the present utility model can be well implemented.

Claims

1. The pressure trigger alarm is characterized by mainly comprising a power supply module, a pressure trigger switch K2, a signal control circuit, a buzzer SP and a buzzer circuit, wherein the power supply end of the signal control circuit is connected with the power supply module, the output end of the signal control circuit is connected with the buzzer SP after passing through the buzzer circuit, and the pressure trigger switch K2 is connected in series on a circuit between the power supply end of the signal control circuit and the power supply module.

2. A pressure triggered alarm as claimed in claim 1, wherein a power switch K1 is further provided on the power module, the input terminal of the power switch K1 being connected to the positive electrode of the power module, and the output terminal thereof being connected to the input terminal of the pressure triggered switch K2.

3. The pressure trigger alarm according to claim 1 or 2, wherein the signal control circuit is composed of a control chip U, a resistor R2 and a resistor R3, pins 1 and 4 of the control chip U are grounded, an input end of the pressure trigger switch K2 is connected with the positive electrode of the power module, an output end of the pressure trigger switch K2 is sequentially grounded after passing through the resistor R2 and the resistor R3, pin 2 of the control chip U is connected with a connection point of the resistor R2 and the resistor R3, and pins 3 and 4 of the control chip U are connected with a buzzing circuit.

4. A pressure trigger alarm according to claim 3, wherein the buzzing circuit is composed of a triode VT1 and a three-pin boost inductor L, the base electrode of the triode VT1 is connected with pin 3 of the control chip U, the collector electrode of the triode VT1 is connected with pin 4 of the control chip U, and the emitter electrode of the triode VT1 is connected with the start pin of the three-pin boost inductor L; the common pin of the three-pin boost inductor L is connected with the input end of the pressure trigger switch K2, and is grounded after passing through the pressure trigger switch K2, the resistor R2 and the resistor R3 in sequence; the ending pin and the starting pin of the three-pin boosting inductor L are connected with the anode and the cathode of the buzzer SP.

5. A pressure triggered alarm as claimed in claim 3 wherein a vibration switch circuit is provided in parallel with the pressure triggered switch K2.

6. The pressure triggered alarm of claim 5, wherein the vibration switch circuit is a vibration switch SW-18015P spring vibration switch or a SW-520 angle tilt trigger switch.

7. A pressure triggered alarm as claimed in any one of claims 4 to 6 wherein a thyristor circuit is also provided in the pressure triggered alarm in parallel with the pressure triggered switch K2.

8. The pressure trigger alarm according to claim 7, wherein the thyristor circuit is composed of a thyristor diode Q1 and a resistor R1, the anode of the thyristor diode Q1 is connected with the input end of the pressure trigger switch K2, the cathode of the thyristor diode Q1 is connected with the output end of the pressure trigger switch K2, and the resistor R1 is connected in series between the gate and the cathode of the thyristor diode Q1.

9. The pressure trigger alarm of claim 8, wherein the control chip U is a CX55 integrated chip, an AC3Y710 chip, or an AC3M01 chip.

10. A pressure triggered alarm as claimed in claim 9 wherein the pressure triggered switch K2 is a mechanical push switch.