Rescue guidance alarm circuit and rescue guidance alarm

Abstract

The utility model relates to the technical field of safety production alarm devices, in particular to a rescue guidance alarm circuit and a rescue guidance alarm. The rescue guidance alarm circuit comprises a master control circuit, a power supply circuit, a voice playing circuit and a loudspeaker. The main control circuit is connected with the voice playing circuit, the loudspeaker is connected with the voice playing circuit, the main control circuit is connected with the power supply circuit, the power supply circuit comprises a first battery and a power supply management sub-circuit, the power supply management sub-circuit comprises a key power supply control sub-circuit, and the key power supply control sub-circuit comprises an MOS tube. The grid electrode of the MOS tube is connected with the alarm key signal input end, the source electrode of the MOS tube is connected with the first direct-current voltage input end, and the drain electrode of the MOS tube is connected with the input end of the first battery. The system is high in reliability, can provide scientific and effective help and guidance for rescue workers, and reduces life and property loss caused by no safety protection or nonstandard rescue of the rescue workers in emergency.

Description

Technical Field

[0001] The utility model relates to the technical field of safety production alarm devices, in particular to a rescue guidance alarm circuit and a rescue guidance alarm. Background Art

[0002] Limited space operation and rescue are important links in safety production. Most enterprises have carried out safety production training for this link. However, due to the lack of training teachers and the perfunctory training in a large number of small and medium-sized enterprises, combined with the lack of reinforcement of memory through drills, employees are anxious during the rescue process and it is very difficult to carry out scientific and effective rescue. At present, although there are alarm devices, the alarm devices currently used need to be powered by an external power supply. In some dangerous situations, the external power supply often cannot be normally powered, resulting in the failure of the alarm device. Moreover, the alarm devices currently used do not have voice broadcast and recording functions and cannot play scientific guidance information for the rescue personnel in critical situations. Summary of the Utility Model

[0003] In view of this, the embodiments of the utility model provide a rescue guidance alarm circuit and a rescue guidance alarm, which are used to solve the technical problem that the existing alarm devices cannot provide scientific and effective help and guidance for rescue personnel after a safety production accident occurs.

[0004] The technical solution adopted by the utility model is as follows:

[0005] In the first aspect, the utility model provides a rescue guidance alarm circuit, including: a main control circuit, a power supply circuit, a voice playback circuit and a speaker. The main control circuit is connected to the voice playback circuit, the speaker is connected to the voice playback circuit, the main control circuit is connected to the power supply circuit. The power supply circuit includes a first battery and a power management sub-circuit. The power management sub-circuit includes a key power supply control sub-circuit. The key power supply control sub-circuit includes a MOS transistor. The gate of the MOS transistor is connected to the alarm key signal input terminal. The source of the MOS transistor is connected to the first DC voltage input terminal. The drain of the MOS transistor is connected to the input terminal of the first battery. The output terminal of the first battery is connected to the voltage input terminal of the main control circuit. The ground connection terminal of the first battery is connected to the ground terminal.

[0006] Preferably, the power management sub-circuit further includes a program power supply control sub-circuit. The output control terminal of the program power supply control sub-circuit is connected to the gate of the MOS transistor.

[0007] Preferably, the program power supply control sub-circuit includes a first diode, a first resistor, a second resistor, and a first triode. The positive electrode of the first diode is connected to the program power supply control terminal. One end of the first resistor is connected to the negative electrode of the first diode, and the other end is connected to the base of the first triode. One end of the second resistor is connected to the base of the first triode, and the other end is connected to the emitter of the first triode. The emitter of the first triode is connected to the ground terminal, and the collector of the first triode is connected to the gate of the MOS transistor.

[0008] Preferably, the power management sub-circuit further includes an external power supply control sub-circuit, and the output control terminal of the external power supply control sub-circuit is connected to the gate of the MOS transistor.

[0009] Preferably, the external power supply control sub-circuit includes a second diode, a third diode, and a fourth diode. The positive electrode of the second diode is connected to the external power supply input terminal. The negative electrode of the second diode is connected to the negative electrode of the fourth diode. The positive electrode of the fourth diode is connected to the ground terminal. The positive electrode of the second diode is connected to the positive electrode of the third diode. The negative electrode of the third diode is connected to the negative electrode of the first diode.

[0010] Preferably, the key power supply control sub-circuit further includes a fifth resistor. One end of the fifth resistor is connected to the first DC power supply input terminal, and the other end is connected to the gate of the MOS transistor. The key power supply control sub-circuit further includes a fifth diode. The positive electrode of the fifth diode is connected to the gate of the MOS transistor, and the negative electrode of the fifth diode is connected to the alarm key signal input terminal.

[0011] Preferably, the power management sub-circuit further includes a first battery detection sub-circuit. The first battery detection sub-circuit includes a third resistor, a fourth resistor, and a first capacitor. One end of the third resistor is connected to the input terminal of the first battery, and the other end is connected to one end of the fourth resistor. The end of the fourth resistor far from the third resistor is connected to the ground terminal. One end of the first capacitor is connected to the end of the third resistor far from the first battery input terminal, and the other end of the first capacitor is connected to the ground terminal. The connection end of the third resistor and the fourth resistor is connected to the battery detection terminal of the main control circuit.

[0012] Preferably, the rescue guidance alarm circuit further includes a voice recording circuit and a microphone. The voice recording circuit is respectively connected to the main control circuit and the microphone.

[0013] The rescue guidance alarm circuit further includes an alarm key input circuit and / or a mode key input circuit and / or a mute key input circuit and / or an up arrow key input circuit and / or a down arrow key input circuit.

[0014] The alarm button input circuit includes a first button. One end of the first button is connected to the ground terminal, and the other end is connected to the third port of the main control circuit;

[0015] The mode button input circuit includes a second button. One end of the second button is connected to the ground terminal, and the other end is connected to the sixteenth port of the main control circuit;

[0016] The silencing button input circuit includes a third button. One end of the third button is connected to the ground terminal, and the other end is connected to the eleventh port of the main control circuit;

[0017] The up button input circuit includes a fourth button. One end of the fourth button is connected to the ground terminal, and the other end is connected to the tenth port of the main control circuit;

[0018] The down button input circuit includes a fifth button. One end of the fifth button is connected to the ground terminal, and the other end is connected to the ninth port of the main control circuit.

[0019] Preferably, it further includes a sound alarm driving circuit and / or a light alarm driving circuit. The sound alarm driving circuit includes a first sub-control circuit and a second battery. The input end of the second battery is connected to the output end of the first sub-control circuit. The input end of the first sub-control circuit is connected to the sixth port of the main control circuit. The output end of the second battery is connected to the sound alarm device. The light alarm driving circuit includes a second sub-control circuit and a third battery. The input end of the third battery is connected to the output end of the second sub-control circuit. The input end of the second sub-control circuit is connected to the fifth port of the main control circuit. The output end of the third battery is connected to the light alarm device.

[0020] In a second aspect, this aspect also provides a rescue guidance alarm, including a housing and the rescue guidance alarm circuit described in the first aspect. A circuit board mounting seat, a battery mounting box, an alarm start button, an alarm start button mounting seat, and a speaker support seat are provided in the housing. The circuit board mounting seat is used for mounting the circuit board, the battery mounting box is used for mounting the battery, the alarm start button abuts against the alarm button, and the speaker is mounted on the speaker support seat.

[0021] Preferably, the speaker support base includes a base and four support portions. A cylindrical installation cavity is provided on the base. The four support portions are rotationally symmetric about the axis of the installation cavity. The bottom wall of the speaker is installed in the installation cavity, and the top of the speaker is respectively connected to the four support portions. The cross-sectional area of the end of the support portion close to the base is larger than the cross-sectional area of the end of the support portion close to the top of the speaker. The inner wall of the support portion facing the installation cavity is arc-shaped; the alarm activation button mounting seat includes a cylindrical installation groove, and a through hole is opened on the installation groove. The front end of the alarm activation button passes through the through hole and abuts against the first button; the alarm activation button mounting seat includes a columnar structure, a first splicing plate and a second splicing plate. The first splicing plate and the second splicing plate are spliced below the columnar structure to form a through hole; the projection of the abutting portion of the front end of the alarm activation button and the first button on the first reference plane is located between the projections of the speaker support base and the circuit board mounting seat on the first reference plane. The first reference plane is a plane perpendicular to the axis of the alarm activation button. The projection of the circuit board mounting seat on the second reference plane is located between the projections of the alarm activation button mounting seat and the battery box on the second reference plane. The second reference plane is a plane parallel to the axis of the alarm activation button.

[0022] Beneficial effects: The rescue guidance alarm circuit and the rescue guidance alarm of the present invention can use the voice playback circuit and the speaker to play the rescue operation specifications stored in the main control circuit, so as to guide the rescue personnel to carry out scientific rescue by voice while sounding an alarm and flashing a light. The present invention also manages the battery through the power supply pipeline sub-circuit. When there is no production safety accident and the alarm is started, the alarm is in a standby state and is only awakened after pressing the alarm button. Therefore, it can be used reliably for a long time. And since the present invention is powered by a self-contained battery, the voice playback of the alarm circuit does not rely on an external power supply, which can avoid the situation where the external power supply cannot be used in an emergency. Therefore, the reliability is higher. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, and these are all within the protection scope of the present invention.

[0024] Figure 1 is the circuit schematic diagram of the rescue guidance alarm circuit of the present invention;

[0025] Figure 2 is the circuit schematic diagram of the power supply pipeline sub-circuit in the present invention;

[0026] Figure 3 is the circuit schematic diagram of the DC power supply in the present utility model;

[0027] Figure 4 is the circuit schematic diagram of the external power supply in the present utility model;

[0028] Figure 5 is the circuit schematic diagram of the external power supply detection circuit in the present utility model;

[0029] Figure 6 is the circuit schematic diagram of the alarm button input circuit in the present utility model;

[0030] Figure 7 is the circuit schematic diagram of the mode button input circuit in the present utility model;

[0031] Figure 8 is the circuit schematic diagram of the mute button input circuit in the present utility model;

[0032] Figure 9 is the circuit schematic diagram of the up button input circuit in the present utility model;

[0033] Figure 10 is the circuit schematic diagram of the down button input circuit in the present utility model;

[0034] Figure 11 is the circuit schematic diagram of the sound alarm circuit in the present utility model;

[0035] Figure 12 is the circuit schematic diagram of the light alarm circuit in the present utility model;

[0036] Figure 13 is the structural schematic diagram of the rescue guidance alarm in the present utility model;

[0037] Figure 14 is the internal structural schematic diagram of the rescue guidance alarm in the present utility model;

[0038] Figure 15 is the installation structural schematic diagram of the speaker in the present utility model;

[0039] Figure 16 is the structural schematic diagram of the alarm button mounting base in the present utility model.

[0040] Parts and their numbers in the figure: Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "include..." do not exclude the presence of additional identical elements in the process, method, article or device including the said elements. If there is no conflict, the embodiments of the present utility model and the various features in the embodiments may be combined with each other, and all are within the protection scope of the present utility model.

[0042] Embodiment 1

[0043] As Figure 1 and Figure 2 shown, the present utility model provides a rescue guidance alarm circuit, which includes a main control circuit, a power supply circuit, a voice playback circuit, and a speaker W2. The main control circuit is connected to the voice playback circuit, the speaker W2 is connected to the voice playback circuit, the main control circuit is connected to the power supply circuit, the power supply circuit includes a first battery b1 and a power management sub-circuit, the power management sub-circuit includes a key power supply control sub-circuit, the key power supply control sub-circuit includes a MOS transistor M1, the gate of the MOS transistor M1 is connected to the alarm key signal input terminal, the source of the MOS transistor M1 is connected to the first DC voltage input terminal, the drain of the MOS transistor M1 is connected to the input terminal of the first battery b1, the output terminal of the first battery b1 is connected to the voltage input terminal of the main control circuit, and the ground connection terminal of the first battery b1 is connected to the ground terminal.

[0044] When the alarm is in the standby state, there is no voltage input signal at the gate of MOS transistor M1, and MOS transistor M1 is not conducting. Therefore, there is no corresponding voltage signal input at the input terminal of the first battery b1, and the output terminal of the first battery b1 does not supply power externally. The first battery b1 is approximately physically disconnected from the system, so the power consumption is very low. However, after a production safety accident occurs, the person who discovers the accident first presses the alarm button. The alarm button signal input terminal provides a voltage input signal to the gate of MOS transistor M1, causing MOS transistor M1 to conduct. In this way, the DC4_2V voltage at the first DC power input terminal provides a voltage signal to the input terminal of the first battery b1, driving the output terminal of the first battery b1 to supply power to the main control circuit, and the alarm is awakened. As Figure 3 shown, where the DC4_2V voltage can be provided by a battery.

[0045] Since the rescue guidance alarm circuit of this embodiment is provided with a voice playback circuit and a speaker W2, the rescue operation specifications stored in the main control circuit can be played through the voice playback circuit and the speaker W2, so as to guide the rescue personnel to carry out scientific rescue by voice while alarming. Also, since the power management sub-circuit of this embodiment controls the alarm to be in the standby state and is only awakened after the alarm button is pressed, it can be used reliably for a long time. Also, since the voice playback of the alarm circuit of this embodiment does not rely on an external power supply, the reliability is higher. Specifically, the first battery b1 can use a large-capacity non-rechargeable battery to further improve the service life and reliability of the alarm.

[0046] As Figure 2 shown, the key power supply control sub-circuit further includes a fifth resistor r5. One end of the fifth resistor r5 is connected to the first DC power input terminal, and the other end is connected to the gate of MOS transistor M1; the key power supply control sub-circuit further includes a fifth diode d5. The positive electrode of the fifth diode d5 is connected to the gate of MOS transistor M1, and the negative electrode of the fifth diode d5 is connected to the alarm button signal input terminal. This embodiment uses the fifth diode d5 to protect the key signal input terminal and uses the fifth resistor r5 to adjust the voltage magnitude input to the gate of MOS transistor M1.

[0047] As Figure 2 shown, in this embodiment, the power management sub-circuit further includes a program power supply control sub-circuit. The output control terminal of the program power supply control sub-circuit is connected to the gate of MOS transistor M1. The program power supply control sub-circuit can control the power supply of the first battery b1 through the program running in the main control circuit, so as to realize the awakening of the alarm.

[0048] As Figure 2As shown, the program power supply control sub-circuit includes a first diode D1, a first resistor R1, a second resistor R2, and a first triode K1. The positive electrode of the first diode D1 is connected to the program power supply control terminal. One end of the first resistor R1 is connected to the negative electrode of the first diode D1, and the other end is connected to the base of the first triode K1. One end of the second resistor R2 is connected to the base of the first triode K1, and the other end is connected to the emitter of the first triode K1. The emitter of the first triode K1 is connected to the ground terminal, and the collector of the first triode K1 is connected to the gate of the MOS transistor M1.

[0049] The program power supply control terminal can be connected to the signal output terminal of the main control circuit. The main control circuit outputs a control signal to drive the first triode K1 to work, input a voltage signal to the gate of the MOS transistor M1, so that the MOS transistor M1 is turned on, and further enables the output terminal of the first battery B1 to supply power to the alarm. The first diode D1 is used to ensure signal stability and avoid affecting the program power supply control terminal. The first resistor R1 and the second resistor R2 provide a suitable driving voltage for the first triode K1 after voltage division.

[0050] As Figure 2 shown, the power management sub-circuit further includes an external power supply control sub-circuit. The output control terminal of the external power supply control sub-circuit is connected to the gate of the MOS transistor M1. The external power supply control sub-circuit can control the power supply of the first battery B1 by accessing an external power supply, thereby realizing the wake-up of the alarm.

[0051] As Figure 2 shown, the external power supply control sub-circuit includes a second diode D2, a third diode D3, and a fourth diode D4. The positive electrode of the second diode D2 is connected to the external power supply input terminal. The negative electrode of the second diode D2 is connected to the negative electrode of the fourth diode D4. The positive electrode of the fourth diode D4 is connected to the ground terminal and is connected to the positive electrode of the third diode D3. The positive electrode of the second diode D2 is connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the negative electrode of the first diode D1.

[0052] When an external power supply is connected to the external power supply input terminal, a voltage signal is applied to the base of the first triode K1. The first triode K1 works to apply a voltage signal to the gate of the MOS transistor M1, so that the MOS transistor M1 is turned on, and further drives the first battery B1 to supply power to the alarm. Since this embodiment adopts multiple ways to wake up the alarm, the reliability of the alarm can be further improved. As Figure 4 shown, the external power supply can be provided by a USB power supply.

[0053] As Figure 5As shown in the figure, in order to facilitate the detection of the external power supply, an external power supply detection sub-circuit is further included. The external power supply detection sub-circuit includes a tenth resistor R10, an eleventh resistor R11, and a fourth triode. One end of the tenth resistor R10 is connected to the external power supply input terminal, and the other end is connected to one end of the eleventh resistor R11. The end of the eleventh resistor R11 connected to the tenth resistor R10 is connected to the base of the fourth triode. The end of the eleventh resistor R11 far from the tenth resistor R10 is connected to the emitter of the fourth triode and the ground terminal. The collector of the fourth triode is connected to the first port PA0 of the main control circuit for detecting the external power supply.

[0054] As Figure 2 shown in the figure, in this embodiment, the power management sub-circuit further includes a first battery B1 detection sub-circuit. The first battery B1 detection sub-circuit includes a third resistor R3, a fourth resistor R4, and a first capacitor C1. One end of the third resistor R3 is connected to the input terminal of the first battery B1, and the other end is connected to one end of the fourth resistor R4. The end of the fourth resistor R4 far from the third resistor R3 is connected to the ground terminal. One end of the first capacitor C1 is connected to the end of the third resistor R3 far from the input terminal of the first battery B1, and the other end of the first capacitor C1 is connected to the ground terminal. The end of the third resistor R3 connected to the fourth resistor R4 is connected to the battery detection terminal of the main control circuit. When the MOS transistor M1 is turned on, the first battery B1 detection sub-circuit is powered on, and the battery detection terminal of the main control circuit, that is, the eighth port of the first chip, can detect the voltage signal after being divided by the third resistor R3 and the fourth resistor R4. The main control circuit can judge whether the first battery B1 is in a normal power supply state according to the magnitude of the voltage signal at the battery detection terminal. To avoid interference, in this embodiment, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 can also be provided in the voltage management sub-circuit. One end of the second capacitor C2 is connected to the end of the third resistor R3 far from the fourth resistor R4, and the other end is connected to the ground terminal. One end of the third capacitor C3 is connected to the input terminal of the battery, and the other end is connected to the ground terminal. One end of the fourth capacitor C4 is connected to the input terminal of the battery, and the other end is connected to the ground terminal. The second capacitor C2, the third capacitor C3, and the fourth capacitor C4 can play a good role in filtering and noise reduction.

[0055] As Figure 1 shown in the figure, in this embodiment, the rescue alarm guidance circuit further includes a voice recording circuit and a microphone W1. The voice recording circuit is respectively connected to the main control circuit and the microphone W1; the user can record the voice played during the alarm through the voice recording circuit and the microphone W1. Among them, the voice recording circuit and the foregoing voice playing circuit can adopt an existing chip integrating the foregoing two circuits, such as the voice recording and playing chip U1 of model JR6001.

[0056] AsFigures 6 to 10 The described guiding alarm circuit further includes an alarm button input circuit and / or a mode button input circuit and / or a mute button input circuit and / or an up button input circuit and / or a down button input circuit;

[0057] As shown, Figure 6 The described alarm button input circuit includes a first button ALARM_KEY, one end of the first button ALARM_KEY is connected to the ground terminal, and the other end is connected to the third port PA2 of the main control circuit;

[0058] After the first button ALARM_KEY is pressed, the third port PA2 of the main control circuit receives the button signal, and at this time, the main control circuit can play the alarm voice.

[0059] As Figure 7 shown, the described mode button input circuit includes a second button MODE_KEY, one end of the second button MODE_KEY is connected to the ground terminal, and the other end is connected to the sixteenth port PA15 of the main control circuit;

[0060] After the second button MODE_KEY is pressed, the sixteenth port PA15 of the main control circuit receives the button signal, and at this time, the main control circuit can switch the current working mode of the alarm.

[0061] As Figure 8 shown, the described mute button input circuit includes a third button MUTE_KEY, one end of the third button MUTE_KEY is connected to the ground terminal, and the other end is connected to the eleventh port PA10 of the main control circuit;

[0062] After the third button MUTE_KEY is pressed, the eleventh port PA10 of the main control circuit receives the button signal, and at this time, the alarm sound can be eliminated.

[0063] As Figure 9 shown, the described up button input circuit includes a fourth button UP_KEY, one end of the fourth button UP_KEY is connected to the ground terminal, and the other end is connected to the tenth port PA9 of the main control circuit;

[0064] As Figure 10 shown, the described down button input circuit includes a fifth button DOWN_KEY, one end of the fifth button DOWN_KEY is connected to the ground terminal, and the other end is connected to the ninth port PA8 of the main control circuit.

[0065] In this embodiment, by pressing the up button and the down button, the target option during mute is moved, thereby realizing the human-machine interaction function of the alarm.

[0066] As Figure 11 and Figure 12As shown in the figure, the rescue alarm guidance circuit of this embodiment further includes a sound alarm drive circuit and / or a light alarm drive circuit. The sound alarm drive circuit includes a first sub-control circuit and a second battery b2. The input end of the second battery b2 is connected to the output end of the first sub-control circuit. The input end of the first sub-control circuit is connected to the fifth port PA4 of the main control circuit. The output end of the second battery b2 is connected to the sound alarm device. The light alarm drive circuit includes a second sub-control circuit and a third battery b3. The input end of the third battery b3 is connected to the output end of the second sub-control circuit. The input end of the second sub-control circuit is connected to the sixth port PA5 of the main control circuit. The output end of the third battery b3 is connected to the light alarm device.

[0067] When the main control circuit detects that the alarm button is pressed, it can send a control signal to the first sub-control circuit through the fifth port PA4. After receiving the signal, the first sub-control circuit controls the second battery b2 to supply power to the sound alarm device, driving the sound alarm device to emit a sound alarm.

[0068] As Figure 11 shown in the figure, the first sub-control circuit includes a sixth resistor r6, a seventh resistor r7, and a second triode k2. One end of the sixth resistor r6 is connected to the fifth port PA4 of the main control circuit, and the other end is connected to one end of the seventh resistor r7. The end of the seventh resistor r7 far from the sixth resistor r6 is connected to the ground terminal. The end of the seventh resistor r7 connected to the sixth resistor r6 is connected to the base of the second triode k2. The emitter of the second triode k2 is connected to the ground terminal. The collector of the second triode k2 is connected to the input end of the second battery b2.

[0069] When the main control circuit detects that the alarm button is pressed, it can send a control signal to the first sub-control circuit through the fifth port PA4. After receiving the signal, the first sub-control circuit controls the third battery b3 to supply power to the light alarm device, driving the light alarm device to emit a light alarm.

[0070] As Figure 12 shown in the figure, the second sub-control circuit includes an eighth resistor r8, a ninth resistor r9, and a third triode k3. One end of the eighth resistor r8 is connected to the sixth port PA5 of the main control circuit, and the other end is connected to one end of the ninth resistor r9. The end of the ninth resistor r9 far from the eighth resistor r8 is connected to the ground terminal. The end of the ninth resistor r9 connected to the eighth resistor r8 is connected to the base of the third triode k3. The emitter of the third triode k3 is connected to the ground terminal. The collector of the third triode k3 is connected to the input end of the second battery b2.

[0071] Among them, the main control circuit may include a first chip U1, and the first chip U1 may adopt a chip with the model number MM32G0001. Among them, the VDD port of the first chip U1, which is the voltage input terminal of the main control circuit, is connected to a 3V voltage input, and the VSS port is connected to the ground terminal. The fourth port PA3 and the thirteenth port PA12 of the first chip U1 are communicatively connected to the recording and playing circuit. This embodiment can play the pre-recorded rescue guidance information through voice, or can record the rescue guidance information by itself for playing. For example, the recorded content can be:

[0072] "Precautions for rescue:

[0073] 1. Set up a warning area, and non-rescue personnel are not allowed to enter.

[0074] 2. Rescue personnel must correctly wear individual protective equipment such as air respirators, safety belts, and safety ropes to carry out the rescue.

[0075] 3. Keep the rescue site ventilated, and use mechanical ventilation equipment to convey clean air into the confined space.

[0076] 4. The rescue personnel should keep in touch with the external personnel and always pay attention to the situation of the rescue personnel.

[0077] 5. Move the rescued person to a well-ventilated place. If unconscious, perform first aid and contact medical staff for prompt medical treatment."

[0078] After the user presses the start button, the light alarm drive circuit drives the alarm light to flash, and the alarm and voice broadcast are played simultaneously. When the alarm and voice broadcast are in progress, the alarm frequency is set to a high frequency, and the voice broadcast is set to a normal frequency, so that both sounds can be clearly heard.

[0079] Embodiment 2

[0080] As Figure 13 shown, this embodiment provides a rescue guidance alarm, and the rescue guidance alarm includes the rescue alarm guidance circuit described in any one of Embodiment 1.

[0081] As Figure 13 shown, the alarm rescue device further includes a housing 1, the alarm rescue circuit is installed in the housing 1, and a ventilation port 9 is provided on the housing. An alarm start button 81 is also provided on the housing, and the alarm start button 81 is connected to the alarm key. When the user presses the alarm start button 81, the alarm key can be pressed. In order to facilitate the user to accurately press the alarm start button 81, the size of the alarm start button 81 can be set to be larger than the sizes of other buttons or keys, and the functions of each button or key are marked with words on each button or key. For example, a recording button 82, a mode button 83, a volume "+" button 84, and a volume "-" button 85 can be set.

[0082] The alarm rescue device further includes a silencing button 86. After the silencing button 86 is pressed, if there is no operation within a predetermined time, the alarm automatically enters the sleep mode to save power.

[0083] As Figure 14 As shown, a circuit board mounting seat 2, a battery mounting box 3, an alarm activation button 81, an alarm activation button mounting seat 4, and a speaker support seat 5 are provided in the housing. The circuit board mounting seat 2 is used to mount a circuit board 6. The power supply circuit, voice playback circuit, and power management sub-circuit of the aforementioned alarm circuit can be provided on the circuit board 6.

[0084] In this embodiment, the battery mounting box 3 is used to mount a battery. The alarm activation button 81 abuts against the alarm key. When the user presses the alarm activation button 81, the alarm activation button 81 presses the alarm key to generate a trigger signal for alarm operation.

[0085] As Figure 15 As shown, in this embodiment, the speaker 7 is mounted on the speaker support seat 5. The speaker support seat 5 includes a base and four support portions 52. A cylindrical mounting cavity 511 is provided on the base. The four support portions 52 are rotationally symmetric about the axis of the mounting cavity 511. The bottom wall of the speaker 7 is mounted in the mounting cavity 511. The top of the speaker 7 is respectively connected to the four support portions 52. The cross-sectional area of the end of the support portion 52 close to the base is larger than the cross-sectional area of the end of the support portion 52 close to the top of the speaker. The inner wall of the support portion 52 facing the mounting cavity 511 is arc-shaped.

[0086] As Figure 16 As shown, in this embodiment, the base and the four support portions 52 are used to support the speaker 7 from the bottom and top of the speaker 7 respectively, so that the speaker 7 remains stable during vibration. The vibration of the speaker 7 is isolated from other parts of the housing through the support portion 52 with a narrow top and a wide bottom, thereby avoiding being affected when the speaker 7 works. In this embodiment, the strength of the support portion 52 is also improved by setting the inner wall of the support portion 52 to be arc-shaped.

[0087] The alarm activation button mounting seat 4 includes a cylindrical mounting groove 41. A through hole 42 is provided in the mounting groove 41. The front end of the alarm activation button 81 passes through the through hole 42 and abuts against the first key. In this embodiment, a part of the alarm activation button 81 can be embedded in the mounting groove 41, thereby saving the overall space of the alarm, and the through hole 42 in the mounting groove 41 is used to limit the axial movement of the alarm activation button 81, so that the alarm activation button 81 can accurately and reliably press the first key to generate an alarm action.

[0088] The alarm activation button mounting base 4 includes a columnar structure, a first splicing plate, and a second splicing plate. The first splicing plate and the second splicing plate are spliced below the columnar structure to form a through hole 42. After adopting the foregoing structure, the front end of the alarm activation button 81 can first pass through the first splicing plate and the second splicing plate and then be spliced, so that the relatively large front end of the alarm activation button 81 can conveniently pass through the through hole 42 opened in the mounting groove 41.

[0089] Wherein the housing includes a first sub-housing and a second sub-housing. A plurality of connecting columns are provided on the first sub-housing, and the axial direction of the connecting columns is parallel to the axial direction of the speaker. The second sub-housing is connected to the first sub-housing through the connecting columns.

[0090] As Figure 14 shown, the projection of the front end of the alarm activation button 81 and the first button abutting portion on the first reference plane is located between the projections of the speaker support base 5 and the circuit board mounting base 2 on the first reference plane. The first reference plane is a plane perpendicular to the axis of the alarm activation button 81. The projection of the circuit board mounting base on the second reference plane is located between the projections of the alarm activation button mounting base 4 and the battery box 3 on the second reference plane. The second reference plane is a plane parallel to the axis of the alarm activation button 81. Adopting the foregoing layout structure can not only stagger and stack the alarm activation button 8, the speaker 7, and the circuit board mounting base 2 from each other without mutual influence, but also make the positions of the circuit board 6, the alarm activation button 8, and the battery box 3 compact, thereby saving space and reducing the overall volume of the alarm.

[0091] In this embodiment, the number of speakers is two, and the two speakers are respectively located on opposite sides inside the housing, so that the rescue guidance alarm can play rescue guidance voices to a wider range.

[0092] The above is only the specific implementation manner of the present utility model. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here. It should be understood that the protection scope of the present utility model is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present utility model, and these modifications or substitutions should all be covered within the protection scope of the present utility model.

Claims

1. The rescue guidance alarm circuit is characterized by: include: A main control circuit, a power supply circuit, a voice playing circuit and a speaker, wherein the main control circuit is connected to the voice playing circuit, the speaker is connected to the voice playing circuit, the main control circuit is connected to the power supply circuit, the power supply circuit includes a first battery and a power management subcircuit, the power management subcircuit includes a key power supply control subcircuit, the key power supply control subcircuit includes a MOS tube, the gate of the MOS tube is connected to the alarm key signal input terminal, the source of the MOS tube is connected to the first DC voltage input terminal, the drain of the MOS tube is connected to the input terminal of the first battery, the output terminal of the first battery is connected to the voltage input terminal of the main control circuit, and the ground connection terminal of the first battery is connected to the ground terminal.

2. The rescue guidance alarm circuit according to claim 1, characterized in that: The power management subcircuit also includes a program power supply control subcircuit, and the output control terminal of the program power supply control subcircuit is connected to the gate of the MOS tube.

3. The rescue guidance alarm circuit according to claim 2, characterized in that: The program power supply control subcircuit includes a first diode, a first resistor, a second resistor and a first transistor, wherein the anode of the first diode is connected to the program power supply control terminal, one end of the first resistor is connected to the cathode of the first diode, and the other end is connected to the base of the first transistor, one end of the second resistor is connected to the base of the first transistor, and the other end is connected to the emitter of the first transistor, the emitter of the first transistor is connected to the ground terminal, and the collector of the first transistor is connected to the gate of the MOS tube.

4. The rescue guidance alarm circuit according to claim 3, characterized in that: The power management subcircuit also includes an external power supply control subcircuit, and the output control terminal of the external power supply control subcircuit is connected to the gate of the MOS tube.

5. The rescue guidance alarm circuit according to claim 4, characterized in that: The external power supply control subcircuit includes a second diode, a third diode and a fourth diode, the anode of the second diode is connected to the external power input terminal, the cathode of the second diode is connected to the cathode of the fourth diode, the anode of the fourth diode is connected to the ground terminal, the anode of the second diode is connected to the anode of the third diode, and the cathode of the third diode is connected to the cathode of the first diode.

6. The rescue guidance alarm circuit according to claim 1, characterized in that: The button power supply control subcircuit also includes a fifth resistor, one end of which is connected to the first DC power supply input terminal, and the other end is connected to the gate of the MOS tube; the button power supply control subcircuit also includes a fifth diode, the anode of the fifth diode is connected to the gate of the MOS tube, and the cathode of the fifth diode is connected to the alarm button signal input terminal.

7. The rescue guidance alarm circuit according to claim 1, characterized in that: The power management subcircuit also includes a first battery detection subcircuit, which includes a third resistor, a fourth resistor and a first capacitor, one end of the third resistor is connected to the input end of the first battery, and the other end is connected to one end of the fourth resistor, an end of the fourth resistor away from the third resistor is connected to the ground end, one end of the first capacitor is connected to an end of the third resistor away from the input end of the first battery, the other end of the first capacitor is connected to the ground end, and the end of the third resistor connected to the fourth resistor is connected to the battery detection end of the main control circuit.

8. The rescue guidance alarm circuit according to any one of claims 1 to 7, characterized in that: The rescue guidance alarm circuit also includes a voice recording circuit and a microphone, and the voice recording circuit is connected to the main control circuit and the microphone respectively; The rescue guidance alarm circuit also includes an alarm button input circuit and / or a mode button input circuit and / or a mute button input circuit and / or an up button input circuit and / or a down button input circuit; The alarm button input circuit includes a first button, one end of which is connected to the ground terminal, and the other end of which is connected to the third port of the main control circuit; The mode key input circuit includes a second key, one end of the second key is connected to the ground terminal, and the other end is connected to the sixteenth port of the main control circuit; The mute key input circuit includes a third key, one end of the third key is connected to the ground terminal, and the other end is connected to the eleventh port of the main control circuit; The up-shift key input circuit includes a fourth key, one end of the fourth key is connected to the ground terminal, and the other end is connected to the tenth port of the main control circuit; The down-shift key input circuit includes a fifth key, one end of the fifth key is connected to the ground terminal, and the other end is connected to the ninth port of the main control circuit; The rescue guidance alarm circuit also includes a sound alarm driving circuit and / or a light alarm driving circuit, the sound alarm driving circuit includes a first sub-control circuit and a second battery, the input end of the second battery is connected to the output end of the first sub-control circuit, the input end of the first sub-control circuit is connected to the fifth port of the main control circuit, the output end of the second battery is connected to the sound alarm device, the light alarm driving circuit includes a second sub-control circuit and a third battery, the input end of the third battery is connected to the output end of the second sub-control circuit, the input end of the second sub-control circuit is connected to the sixth port of the main control circuit, and the output end of the third battery is connected to the light alarm device.

9. A rescue guidance alarm, characterized in that: It comprises a shell and the rescue guidance alarm circuit described in any one of claims 1 to 8, wherein a circuit board mounting seat, a battery mounting box, an alarm start button and an alarm start button mounting seat and a speaker support seat are provided in the shell, the circuit board mounting seat is used to install the circuit board, the battery mounting box is used to install the battery, the alarm start button abuts against the alarm key, and the speaker is installed on the speaker support seat.

10. The alarm device according to claim 9, characterized in that: The speaker support seat includes a base and four supporting parts. A cylindrical installation cavity is provided on the base. The four supporting parts are rotationally symmetrically arranged with the axis of the installation cavity as the center. The bottom wall of the speaker is installed in the installation cavity. The top of the speaker is respectively connected to the four supporting parts. The cross-sectional area of ​​one end of the supporting part close to the base is larger than the cross-sectional area of ​​one end of the supporting part close to the top of the speaker. The inner wall of the supporting part facing the installation cavity is arc-shaped. The alarm start button mounting seat includes a cylindrical installation groove. A through hole is opened on the installation groove. The front end of the alarm start button passes through the through hole and abuts against the first button. ; The alarm start button mounting base includes a columnar structure, a first splicing plate and a second splicing plate, and the first splicing plate and the second splicing plate are spliced ​​together at the bottom of the columnar structure to form a through hole; the projection of the front end of the alarm start button and the first button abutting part on the first reference plane is located between the projection of the speaker support base and the circuit board mounting base on the first reference plane, the first reference plane is a plane perpendicular to the axis of the alarm start button, the projection of the circuit board mounting base on the second reference plane is located between the projection of the alarm start button mounting base and the battery box on the second reference plane, and the second reference plane is a plane parallel to the axis of the alarm start button.

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