CN114093127A

CN114093127A - Human body tumbling alarm equipment

Info

Publication number: CN114093127A
Application number: CN202111655055.2A
Authority: CN
Inventors: 张露露; 李涵
Original assignee: Harbin Zhenyu Technology Co ltd
Current assignee: Harbin Zhenyu Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-02-25
Anticipated expiration: 2041-12-30
Also published as: CN114093127B

Abstract

A human body tumbling alarm device comprises a storage battery, a charging socket, a crutch body and a shell; the device is also provided with a detection mechanism, a detection circuit, an obstacle prompting mechanism and a power supply circuit; the detection mechanism comprises a power switch, a spring and a movable rod, the power switch is arranged at the inner lower end of the crutch body, the guide rod is positioned at the inner lower end of the crutch body, the obstacle prompting mechanism comprises a photoelectric switch and a sounder, the power supply circuit comprises a metal sheet and a trigger sub-circuit, and the metal sheet is arranged at the outer side of the upper end of a handle of the crutch body; the storage battery, the charging socket, the detection circuit and the trigger sub-circuit are arranged in the shell and electrically connected with the metal sheet, and the shell is arranged at the front lower end of the crutch body. The invention prevents the user from forgetting to turn on the power supply, prevents the whole equipment from working, does not generate false alarm signals, can send out alarm sound at the first time when the front end of the user has an obstacle, and can prompt surrounding personnel to rescue through on-site sounding after falling down and prompt remote family personnel to rescue through short messages.

Description

Human body tumbling alarm equipment

Technical Field

The invention relates to the technical field of alarm equipment, in particular to human body falling alarm equipment.

Background

The elderly or people with disabled legs and poor eyesight generally adopt crutches to assist walking in order to reduce the probability of falling during walking. Current intelligent walking stick can realize the function that the user tumbled the warning, but receive the structure limit, it generally adopts universal mercury switch etc. as the detecting head, universal mercury switch is when the user mentions the walking stick or puts down the walking stick and contacts to the ground, if too big hard, probably can cause inside mercury liquid level to rock two normally open contacts of too big contact (universal mercury switch comprises glass shell and the interior mercury of glass shell lower extreme and two contacts of interior upper end, mercury transform angle or rock the angle when too big, two contacts of mercury contact), so have the probability to cause the alarm mechanism of power supply through two normally open contacts to produce the unnecessary chimes of doom, not only bring inconvenience for the user, also can bring unnecessary interference to the passerby.

Particularly, when the old people use the crutch, due to the influence of factors such as poor memory and the like, the user may forget to turn on the power switch when using the crutch, so that the user cannot work due to the fact that the power is not turned on and the alarm mechanism is not turned on when falling down, and the user is not rescued in time when falling down with high probability to cause unforeseeable serious consequences. Finally, when the user uses the crutch in a visually impaired area or in an area with poor light, the crutch does not have the function of detecting obstacles at the front end, so that the user may fall down by touching the obstacles for various reasons while walking. In summary, it is necessary to provide an alarm device capable of preventing false alarm in normal use, automatically turning on the power supply during use, and detecting a front obstacle.

Disclosure of Invention

In order to overcome the defects that the prior alarm device based on the crutch is easy to generate false alarm due to the limited structure, the user forgets to turn on the power switch alarm mechanism and cannot be powered to work, the user cannot timely rescue when falling down, and the prior alarm device has no obstacle detection function, and the falling probability is increased when the light is poor or the user walks with poor eyesight, the invention provides a crutch based on a crutch body, under the combined action of related mechanisms and circuits in the use, the whole circuit can be powered to work automatically after the user touches the crutch body with hands, the user is prevented from forgetting to turn on the power supply whole equipment to stop working, whether the user falls down is detected through a micro power switch, a false alarm signal cannot be generated, the alarm sound can be generated at the first time when the user has an obstacle at the front end, and the surrounding personnel can be prompted to rescue in the scene after falling down, the far-end family can be prompted to rescue through the short message, and therefore the human body falling alarm device can achieve a good safety effect.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a human body tumbling alarm device comprises a storage battery, a charging socket, a crutch body and a shell; the device is characterized by also comprising a detection mechanism, a detection circuit, an obstacle prompt mechanism and a power supply circuit; the detection mechanism comprises a power switch, a spring and a movable rod, wherein the lower end of the walking stick body is of a hollow structure, a partition plate is arranged in the lower end of the walking stick body, a floor contact plate and a non-slip mat are arranged at the lower end of the movable rod, a guide rod is arranged at the upper end of the movable rod, the spring is sleeved on the outer side of the guide rod, the power switch is arranged at the upper part of the lower end in the walking stick body, a button of the power switch faces downwards, the movable rod is arranged in the lower end of the walking stick body, the upper part of the guide rod is positioned at the upper part of the partition plate, and a top plate is arranged at the upper end of the movable rod; the obstacle prompting mechanism comprises a photoelectric switch and a sounder, the power supply circuit comprises a metal sheet and a trigger sub-circuit, and the metal sheet is arranged on the outer side of the upper end of the handle of the crutch body; the storage battery, the charging socket, the detection circuit, the trigger sub-circuit and the photoelectric switch are arranged in the shell, and the shell is arranged at the front lower end of the crutch body; the power supply output end of the power supply circuit is electrically connected with the power input ends of the detection circuit, the obstacle prompting mechanism and the detection mechanism, and one end of the power switch is electrically connected with the signal input end of the detection circuit.

Further, the power switch is a normally closed contact type power switch.

Further, the guide rod external diameter is less than the inside diameter of the shaft hole of the isolation plate, and the external diameter of the top plate is greater than the inside diameter of the shaft hole of the isolation plate.

The detection circuit comprises a resistor, a capacitor, an NPN triode, a relay, a sounder and a short message module which are electrically connected, wherein the positive power input end of the short message module is connected with the positive power input end of the relay and the control power input end, one end of the first resistor is connected with one end of the second resistor and the positive electrode of the capacitor, the other end of the second resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the negative power input end of the relay and the negative electrode trigger signal input end of the short message module, the normally open contact end of the relay is connected with the positive power input end of the sounder, and the negative electrode of the capacitor is connected with the emitter electrode of the NPN triode, the negative power input end of the sounder and the negative power input end of the short message module.

Furthermore, the photoelectric switch of the obstacle prompting mechanism is a PNP type reflection-type photoelectric switch and is electrically connected with the audible device, a detection head of the photoelectric switch is positioned outside the hole at the front end of the shell, an anode power supply output end of the photoelectric switch is connected with an anode power supply input end of the audible device, and a cathode power supply input end of the photoelectric switch is connected with a cathode power supply input end of the audible device.

Further, the power supply circuit comprises a field effect transistor, a resistor, an NPN triode, a capacitor and an NPN triode which are electrically connected, one end of the first resistor is connected with a collector of the first NPN triode, a grid of the field effect transistor is connected with a metal sheet, a drain of the field effect transistor is connected with the other end of the first resistor and a base of the first NPN triode, an emitter of the first NPN triode is connected with a positive electrode of the first capacitor and one end of the second resistor, the other end of the second resistor is connected with one end of the third resistor and a positive electrode of the second capacitor, one end of the third resistor is connected with a base of the second NPN triode, an emitter of the second NPN triode is connected with a base of the third NPN triode, collectors of the second NPN triode and the third NPN triode are connected, and a source of the field effect transistor is connected with the emitters of the two capacitors and the third NPN triode.

The invention has the beneficial effects that: the walking stick is based on the walking stick body, a user does not need to manually control the working state of the circuit in use, after the hand of the user holds the handle of the walking stick body, the detection mechanism, the detection circuit and the obstacle prompting mechanism at the rear stage can be automatically powered on to work under the action of the power supply circuit, and when the hand leaves the handle, the detection mechanism, the detection circuit and the obstacle prompting mechanism are powered off and do not work, so that the intelligent control purpose is achieved, and the situation that the user forgets to turn on a power switch and cannot give an alarm when falling down can be prevented. Under the action of the obstacle prompting mechanism, when an obstacle exists at a certain distance at the walking front end of a user, the buzzer can sound to prompt the user to pay attention to safety and prevent unpredictable accidents caused by collision with the obstacle. Under the action of the detection mechanism and the detection circuit, if a user falls down, the alarm sound can be sent out on site, and a short message can be sent out to family members of the user, so that surrounding personnel and family members can give rescue measures in time, and unforeseen risks caused by too late rescue are reduced. Based on the above, the invention has good application prospect.

Drawings

The invention is further illustrated below with reference to the figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, the human body falling alarm device comprises a storage battery G, a charging socket CZ, a crutch body 1 and a shell 2; the device is also provided with a detection mechanism, a detection circuit 7, an obstacle prompt mechanism and a power supply circuit 3; the detection mechanism comprises a point-action type button normally-closed contact power switch SK, a spring 4 and a movable rod 5, the lower end of a walking stick body 1 is of a cylindrical hollow structure, a separation plate 101 with a shaft hole in the middle is welded in the middle of the lower end of the walking stick body 1, a ground contact plate 51 with the outer diameter larger than the outer diameter of the movable rod 5 is welded at the lower end of the movable rod 5, an anti-skid rubber pad 52 is connected to the lower end of the ground contact plate 51 through glue, a guide rod 53 is vertically welded in the middle of the upper end of the movable rod, the spring 4 is sleeved outside the guide rod 53, the power switch SK is installed on the upper portion of the inner lower end of the walking stick body 1 in a gluing mode, the button of the power switch SK faces the lower end, the upper portion of the guide rod 53 is led out upwards through the shaft hole in the middle of the separation plate 101 (the upper portion of the movable rod is located at the inner lower end of the walking stick body 1), a circular top plate 54 with the outer diameter smaller than the inner diameter of the lower end of the walking stick body is welded at the upper end of the movable rod 5, the upper end of the top plate 54 is just contacted with the power switch SK button when the spring 4 reaches a dead point, the internal contact of the power switch SK is opened; the obstacle prompting mechanism comprises a photoelectric switch A2 and a sounder B, the power supply circuit comprises a metal contact piece M and a trigger sub-circuit 3, the metal contact piece M is arc-shaped, and the metal contact piece M (copper) is adhered to the outer side of the middle part of the upper end of the handle of the crutch body 1 by glue; the storage battery G, the charging socket CZ, the detection circuit 7, the trigger sub-circuit 6 and the photoelectric switch A2 are mounted on a circuit board in the shell 2, and the shell 2 is mounted at the front lower end of the crutch body 1 through a screw nut.

As shown in fig. 1 and 2, the battery G is a 12V/3Ah lithium battery, the charging socket CZ is a coaxial power supply socket, and the power switch SK is a normally closed contact power switch. The metal sheet M and the upper end of the handle are positioned on the same plane. The outer diameter of the guide rod 53 is smaller than the inner diameter of the shaft hole of the isolation plate 101, and the outer diameter of the top plate 54 is larger than the inner diameter of the shaft hole in the middle of the isolation plate 101. The detection circuit comprises resistors R1 and R2, a capacitor C1, an NPN triode Q1, a relay K1, a beeper B and a short message module A1 which are connected through circuit board wiring, wherein a pin 1 at the positive power input end of the short message module A1 is connected with the positive power input end and the control power input end of the relay K1, one end of a first resistor R1 is connected with one end of a second resistor R2 and the positive electrode of the capacitor C1, the other end of the second resistor R2 is connected with the base electrode of the NPN triode Q1, the collector electrode of the NPN triode Q1 is connected with a pin 3 at the negative power input end of the relay K1 and the negative trigger signal input end of the short message module A1, the normally open contact end of the relay K1 is connected with the positive power input end of the beeper B, the negative electrode of the capacitor C1 is connected with the emitter of the NPN triode Q1, the negative power input end of the beeper B and a pin 2 at the negative power input end of the short message module A1. A photoelectric switch A2 of the obstacle prompting mechanism is a PNP type reflection type photoelectric switch finished product and is connected with a signal sounder B1 through a lead, a detection head of a photoelectric switch A2 is positioned outside an opening at the front end of a shell 2, a positive power supply output end pin 3 of the photoelectric switch A2 is connected with a positive power supply input end of the signal sounder B1, and a negative power supply input end pin 2 of the photoelectric switch A2 is connected with a negative power supply input end of the signal sounder B1. The trigger sub-circuit of the power supply circuit comprises a field effect transistor Q2, resistors R3, R4 and R5, NPN triodes Q3, Q4 and Q5 and capacitors C2 and C3 which are connected through circuit board wiring; one end of a first resistor R3 is connected with a collector of a first NPN triode Q3, a grid of a field effect transistor Q2 is connected with the middle of the lower end of a metal sheet M, a drain of the field effect transistor Q2 is connected with the other end of the first resistor R3 and a base of a first NPN triode Q3, an emitter of the first NPN triode Q3 is connected with a positive electrode of a first capacitor C2 and one end of a second resistor R4, the other end of the second resistor R4 is connected with one end of a third resistor R5 and a positive electrode of a second capacitor C3, one end of the third resistor R5 is connected with a base of a second NPN triode Q4, an emitter of the second NPN triode Q4 is connected with a base of a third NPN triode Q5, a collector of the second triode Q4 and a third triode Q5 is connected, and a source of the field effect transistor Q2 is connected with negative electrodes of two NPN capacitors C2, C3 and an emitter of the third triode Q5.

As shown in fig. 1 and 2, two poles of a storage battery G1 and two poles of a charging socket CZ are respectively connected through leads (when the storage battery G1 is out of power, an external 12V power charger plug can be inserted into the charging socket CZ to charge the storage battery G), the positive pole of the storage battery G1 is connected with one end of a power switch S1 through leads, the other end of the power switch S1, the negative pole of the storage battery G11, one end of a power input end resistor R3 of a power supply circuit and the negative pole of a capacitor C2 are respectively connected through leads, the positive pole of the storage battery G1, the collector electrodes of NPN triodes Q4 and Q5 at the power output end of the power supply circuit and the power input end of the detection circuit are respectively connected with the positive power input end of a relay K1, the emitter electrode of the NPN triode Q1 and

pins

1 and 2 of a photoelectric switch A2 at the power input end of the obstacle prompting mechanism through leads, the positive electrode of a storage battery G1 is connected with one end of a power switch SK through a lead, and the other end of the power switch SK is connected with the other end of a resistor R1 at the signal input end of the detection circuit through a lead.

As shown in fig. 1 and 2, according to the walking stick body 1, when a user does not use the walking stick body 1, hands are spaced from a metal sheet M by a certain distance, a gate of a field-effect transistor Q2 has no clutter signal, a source and a drain of the field-effect transistor Q2 are in a zero-bias state, the current between the source and the drain is large, a base voltage of an NPN triode Q3 is lower than 0.7V, and an emitter is in a cut-off state and has no output, so that a capacitor C3 cannot be charged, collectors of the NPN triode Q4 and Q5 have no output, and a rear-stage detection mechanism, a detection circuit and an obstacle prompt mechanism do not work. When a user uses the crutch body 1, the user can touch the metal sheet M when the user holds the crutch body 1 with hands, so that clutter signals induced by a human body can enter the grid electrode of the field-effect tube Q2, the field-effect tube Q2 is no longer in a zero-bias state, the current between the drain and the source is reduced, the base voltage of the NPN triode Q3 is higher than 0.7V and is in a conducting state, the emitter outputs high level to enter the positive electrode of the capacitor C2 (filtering), the high level is reduced and limited by the resistor R4 to charge the capacitor C3, when the capacitor C3 is not fully charged within 25 seconds after the charging is started, the positive electrode of the 12V power supply is reduced and limited by the resistors R4 and R5 to enter the base voltage of the Darlington tube composed of the NPN triodes Q4 and Q5 and is lower than 0.7V, the Darlington tube is in a cut-off state, and a rear-stage detection mechanism, a detection circuit and an obstacle prompt mechanism do not work. When the capacitor C3 is fully charged after 25 seconds, the voltage of a base electrode of a 12V power supply is reduced by voltage and current through resistors R4 and R5, the voltage of a Darlington tube formed by NPN triodes Q4 and Q5 is higher than 0.7V, the Darlington tube is in a conducting state, a collector outputs low level and enters a cathode power supply input end of a detection mechanism, a detection circuit and an obstacle prompting mechanism at the rear stage, and then the detection mechanism, the detection circuit and the obstacle prompting mechanism at the rear stage are powered on to work. In practical situations, when the user does not use the electric hand, the hand leaves the handle, so that the current between the drain and the source of the field effect transistor Q2 is increased again when the field effect transistor Q2 is in a zero-bias state again, the 12V power supply does not charge the capacitor C3 any more, and within 20 seconds, even if the user does not use the crutch and leaves the metal sheet M, the 12V power supply does not charge the capacitor C3 any more, the current charged on the capacitor C3 can keep the Darlington transistor on for about 20 seconds, so that the detection mechanism, the detection circuit and the obstacle prompting mechanism can continue to work for 20 seconds, after 20 seconds, the electricity charged on the capacitor C3 is released, the Darlington transistor is cut off, and the detection mechanism, the detection circuit and the obstacle prompting mechanism stop working after the electricity is released. Through the above, when the user uses the crutch body 1, after the interval of 25 seconds (the time is equal to 1.1 capacitance C3 capacitance R4 resistance), the detection mechanism, the detection circuit and the obstacle prompting mechanism are powered on to work, even if the user falls down and the hands leave the crutch body 1 in use, the relevant detection mechanism, the detection circuit and the obstacle prompting mechanism can be powered on to work for 20 seconds, so that the time requirements of detection alarm and the like (the 20-second alarm completely meets the actual requirements) are ensured, the intelligent control purpose is achieved, and the situation that the user forgets to turn on a power switch and cannot alarm when the user falls down can be prevented; when the crutch is not used (when the crutch body is not used, because the lower end movable rod 5 of the crutch body goes upwards and the top plate 54 can be propped against the power switch SK, the internal contact of the power switch SK is open, and therefore the rear-stage detection circuit cannot be electrified to alarm), the power switch does not need to be operated by hands, and the detection mechanism, the detection circuit and the obstacle prompting mechanism automatically stop working after 20 seconds (the standby current is only about 5 mA).

As shown in fig. 1 and 2, in the obstacle prompting mechanism, when a user uses the crutch body 1, the front of the detection head of the photoelectric switch a2 is aligned to a distance above the ground at the front end of the user (when the crutch body 1 is grounded, the distance between the detection head and the ground is about 10 cm, when the crutch body 1 is lifted, the distance between the detection head and the ground is about 30 cm), when the front end of the user has no obstacle (for example, 1.5 m), 3 feet of the photoelectric switch a2 have no output, so that the sounder B1 cannot sound, when the front end of the user has an obstacle at a certain distance, the detection head of the photoelectric switch a2 outputs a high level to enter the positive power input end of the sounder B1 due to the obstacle shielding of the 3 feet, and the sounder B1 sends a sounding voice prompt of "obstacle exists at the front end", so that the user can avoid the obstacle after hearing the prompt, and prevent the user from colliding with the obstacle and falling down.

As shown in fig. 1 and 2, after the detection mechanism and the detection circuit are powered on, when a user uses the crutch body 1, and the lower end of the crutch body 1, which is in contact with the floor 51, contacts the ground each time, the movable rod 5 can overcome the elastic acting force of the spring 4 to move upwards, and the top plate abuts against the button of the power switch SK, so that the internal contact of the power switch SK is open-circuited, the 12V power supply can not charge the capacitor C1, and the short message module a1 can not send a short message, and the beeper B can not sound. When a user uses the crutch body 1, each time the crutch body 1 is in contact with the floor 51 at the lower end which is off the ground and is not in contact with the ground, the elastic acting force of the spring 4 can push the movable rod 5 to move downwards, the top plate 54 does not push the button of the power switch SK any more because of moving downwards, then the internal contact of the power switch SK is closed, and the 12V power supply can be subjected to voltage reduction and current limitation through the power switch SK with the closed contact through the resistor R1 to charge the capacitor C1; when the capacitor C1 is not fully charged within 6 seconds after the charging is started, the voltage of the positive electrode of the 12V power supply is reduced by the resistors R1 and R2, the current is limited, the voltage of the positive electrode enters the base electrode of the NPN triode Q1 and is lower than 0.7V, the NPN triode Q1 is in a cut-off state, a low-level signal cannot be input into the pin 3 of the rear-stage short message module A1, the relay K1 cannot be electrified to attract, and the buzzer B cannot be electrified to sound. In practical terms, the time that the lower end of the crutch body 1 leaves the ground does not exceed 6 seconds, that is to say, the lower end of the crutch body 1 contacts the ground within 6 seconds, and the internal contact of the power switch SK opens, so the 12V power supply does not charge the capacitor C1 any more, the voltage charged on the capacitor C1 is released rapidly, and only the next time the crutch body leaves the ground and the internal contact of the power switch SK closes, and the 12V power supply charges the capacitor C1. Through the above, on the premise that the crutch body 1 is normally used, the 3 feet of the short message module A1 can not input low level signals, the relay K1 can not be electrified for attraction, and the buzzer B can not be electrified for sounding. In practical situations, after a user falls down by using the crutch body 1, because the lower end of the crutch body 1 cannot be in a state that the lower end is in contact with the ground at the moment, the internal contact of the power switch SK can be closed all the time (the user cannot climb up from the ground and can be closed all the time), when the capacitor C1 is fully charged after 6 seconds, the positive electrode of the 12V power supply is subjected to voltage reduction and current limitation by the resistors R1 and R2, enters the base of the NPN triode Q1 and is higher than 0.7V, the collector of the NPN triode Q1 is in a conducting state, outputs a low level to enter the negative power supply input end of the relay K1, and the low level enters the 3 pins of the short message module a1 at the same time, so that the relay K1 is electrified to attract the control power supply input end and the normally-open contact end to be closed, and then the buzzer B is electrified to emit a loud 'someone falling down' prompt sound to prompt a person to fall down to the peripheral passerby. After a low-level signal is input into the pin 3 of the short message module A1, a pre-stored short message of 'old people falling down' is sent out through a wireless mobile network under the action of an internal circuit, and after receiving the short message, the mobile phone of the family of the old people with the far end connected with the short message module A1 can timely arrive at the scene or inform other nearby relatives or police and the like to rescue, so that unpredictable risks caused by too late rescue are reduced. The invention can detect whether the user falls down through the micro power switch, and can not generate false alarm signals compared with a universal mercury switch, thereby obtaining good safety effect and being more convenient and stable to use. As shown in fig. 2, the short message module a1 is a short message alarm module of a GSM 800 model, the finished short message alarm module a1 has two

power input terminals

1 and 2 pins, and signal input ports 3-8 pins, and after a low level signal is input to each signal input port, the finished short message alarm module will send a short message through a wireless mobile network, the short message alarm module stores a short message, which is stored in the short message alarm module in this embodiment and is "old people fall down", and after a low level signal is input to the signal input port 3 of the short message alarm module, the short message alarm module can send a short message; the photoelectric switch A2 is a PNP type infrared reflection photoelectric switch finished product with a model E3K100-200, the working voltage is direct current 12V, the photoelectric switch is provided with three connecting wires, wherein two

pins

1 and 2 are power supply input wires, the other pin 3 is a signal output wire, the upper end of the photoelectric switch is provided with a detecting head, the emitting head of the detecting head can emit infrared beams during working, when the infrared beams emitted by the detecting head are blocked by objects and received by receiving heads parallel to the detecting head within the farthest range of 200 cm, the 3 pins of the signal output wire can output high level, when no object is blocked, the 3 pins of the signal output wire can not output high level, the rear end of the shell of the photoelectric switch is externally provided with an adjusting knob, the adjusting knob adjusts the detecting distance of the detecting head to the left to become close, and adjusts the detecting distance of the detecting head to the right to become far; NPN triodes Q1, Q3, Q4 and Q5 are respectively 9013, 9014, 9013 and 9013; the fet Q2 is model 3DJ 6. The resistances of the resistors R1, R2, R3, R4 and R5 are 1.1M, 470K, 100K, 2.2M and 470K, respectively. The models of the capacitors C1 and C2 are 4.7 mu F/25V and 10 mu F/25V respectively; the sounder B, B1 is an active continuous audible alarm (which gives out voice prompt for people falling down and obstacles in front).

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A human body tumbling alarm device comprises a storage battery, a charging socket, a crutch body and a shell; the device is characterized by also comprising a detection mechanism, a detection circuit, an obstacle prompt mechanism and a power supply circuit; the detection mechanism comprises a power switch, a spring and a movable rod, wherein the lower end of the walking stick body is of a hollow structure, a partition plate is arranged in the lower end of the walking stick body, a floor contact plate and a non-slip mat are arranged at the lower end of the movable rod, a guide rod is arranged at the upper end of the movable rod, the spring is sleeved on the outer side of the guide rod, the power switch is arranged at the upper part of the lower end in the walking stick body, a button of the power switch faces downwards, the movable rod is arranged in the lower end of the walking stick body, the upper part of the guide rod is positioned at the upper part of the partition plate, and a top plate is arranged at the upper end of the movable rod; the obstacle prompting mechanism comprises a photoelectric switch and a sounder, the power supply circuit comprises a metal sheet and a trigger sub-circuit, and the metal sheet is arranged on the outer side of the upper end of the handle of the crutch body; the storage battery, the charging socket, the detection circuit, the trigger sub-circuit and the photoelectric switch are arranged in the shell, and the shell is arranged at the front lower end of the crutch body; the power supply output end of the power supply circuit is electrically connected with the power input ends of the detection circuit, the obstacle prompting mechanism and the detection mechanism, and one end of the power switch is electrically connected with the signal input end of the detection circuit.

2. The human body fall alarm device of claim 1, wherein the power switch is a normally closed contact power switch.

3. The human body fall alarm device of claim 1, wherein the outer diameter of the guide rod is smaller than the inner diameter of the shaft hole of the isolation plate, and the outer diameter of the top plate is larger than the inner diameter of the shaft hole of the isolation plate.

4. The human body fall alarm device according to claim 1, wherein the detection circuit comprises a resistor, a capacitor, an NPN triode, a relay, a buzzer and a short message module which are electrically connected, wherein a positive power input end of the short message module is connected with a positive power input end of the relay and a control power input end, one end of the first resistor is connected with one end of the second resistor and a positive electrode of the capacitor, the other end of the second resistor is connected with a base of the NPN triode, a collector of the NPN triode is connected with a negative power input end of the relay and a negative trigger signal input end of the short message module, a normally open contact end of the relay is connected with a positive power input end of the buzzer, and a negative electrode of the capacitor is connected with an emitter of the NPN triode, a negative power input end of the sounder and a negative power input end of the short message module.

5. The human body fall alarm device according to claim 1, wherein the photoelectric switch of the obstacle alert mechanism is a PNP-type reflective photoelectric switch and is electrically connected to the sounder, a probe of the photoelectric switch is located outside the opening at the front end of the housing, an anode power supply output terminal of the photoelectric switch is connected to an anode power supply input terminal of the sounder, and a cathode power supply input terminal of the photoelectric switch is connected to a cathode power supply input terminal of the sounder.

6. The human body fall alarm device according to claim 1, wherein the power supply circuit comprises a field effect transistor, a resistor, an NPN transistor, a capacitor and an NPN transistor which are electrically connected, one end of the first resistor is connected with a collector of the first NPN transistor, a grid of the field effect transistor is connected with a metal sheet, a drain of the field effect transistor is connected with the other end of the first resistor, the base electrode of the first NPN triode is connected, the emitting electrode of the first NPN triode is connected with the positive electrode of the first capacitor and one end of the second resistor, the other end of the second resistor is connected with one end of the third resistor and the positive electrode of the second capacitor, one end of the third resistor is connected with the base electrode of the second NPN triode, the emitting electrode of the second NPN triode is connected with the base electrode of the third NPN triode, the collecting electrodes of the second NPN triode and the third NPN triode are connected, and the source electrode of the field effect transistor is connected with the emitting electrodes of the two capacitors and the third NPN triode.