CN114093127B

CN114093127B - Human body tumbling alarm equipment

Info

Publication number: CN114093127B
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: 2023-03-14
Anticipated expiration: 2041-12-30
Also published as: CN114093127A

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, the whole equipment does not work, false alarm signals can not be generated, the alarm sound can be generated at the first time when the front end of the user has a barrier, and after falling down, the invention not only can prompt surrounding personnel to rescue by on-site sounding, but also can prompt the remote family to rescue by 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. The function that current intelligent walking stick can realize the user and fall down to report to the police, 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 touch to the earth, if too big hard, probably can cause inside mercury liquid level to rock two too big normally open contacts of contact (universal mercury switch comprises glass shell and the mercury of glass shell inner lower extreme and two contacts of interior upper end, mercury transform angle or rock the angle when too big, mercury contacts two contacts), so have the probability to cause the alarm mechanism of power supply through two normally open contacts to produce unnecessary alarm sound, not only bring inconvenience for the user, also can bring unnecessary interference to the passerby.

Particularly, when the user of the walking stick is over-aged, the user may forget to turn on the power switch due to factors such as poor memory and the like, 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 the user falls down, and the user cannot be rescued in time to cause unforeseen serious consequences when the user falls down. 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 conventional alarm device based on the crutch is limited by the structure and is easy to generate false alarm, a user forgets to turn on a power switch alarm mechanism and cannot be powered to work, the user cannot be timely helped when falling down occurs at an organic rate, and the prior alarm device does not have an obstacle detection function and increases the falling probability when the light is not good or the user walks with poor eyesight.

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, the lower end of the walking stick body is of a hollow structure, a partition plate is installed in the lower end of the walking stick body, a floor contact plate and an anti-skid pad are installed at the lower end of the movable rod, a guide rod is installed at the upper end of the movable rod, the spring is sleeved on the outer side of the guide rod, the power switch is installed at the upper portion of the lower end in the walking stick body, a button of the power switch faces downwards, the movable rod is installed in the lower end of the walking stick body, the upper portion of the guide rod is located at the upper portion of the partition plate, and a top plate is installed 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.

Further, 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 the positive power supply input end of the short message module is connected with the positive power supply input end of the relay and the control power supply 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 supply input end of the relay and the negative trigger signal input end of the short message module, the normally open contact end of the relay is connected with the positive power supply input end of the buzzer, and the negative electrode of the capacitor is connected with the emitter electrode of the NPN triode, the negative power supply input end of the buzzer and the negative power supply input end of the short message module.

Furthermore, the photoelectric switch of the obstacle prompting mechanism is a PNP type reflection photoelectric switch and is electrically connected with the sounder, a detection head of the photoelectric switch is positioned outside an opening 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 sounder, and a cathode power supply input end of the photoelectric switch is connected with a cathode power supply input end of the sounder.

Further, the power supply circuit comprises a field effect transistor, a resistor, NPN triodes and a capacitor which are electrically connected, wherein 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 the base of the second NPN triode, an emitter of the second NPN triode is connected with the base of the third NPN triode, a collector of the second NPN triode is connected with a collector of the third NPN triode, and a source of the field effect transistor is connected with negative electrodes of the two capacitors and an emitter of 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 a circuit in use, after the hand of the user holds the handle of the walking stick body, the rear-stage detection mechanism, the detection circuit and the obstacle prompting mechanism can automatically power 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 lose power 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 fall 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 prompting 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 53, the spring 4 is sleeved on the outer side of 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 through glue, 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 round 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 movable rod 53 reaches a dead point, and the contact of the power switch SK contact point, and the contact point is opened; the obstacle prompting mechanism comprises a photoelectric switch A2 and a beeper B, the power supply circuit comprises a metal contact piece M and a trigger sub-circuit 3, the metal piece M is arc-shaped, and the metal piece M (made of 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 sounder 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 the negative power input end of the relay K1 and a pin 3 at 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 sounder B, and the negative electrode of the capacitor C1 is connected with the emitter electrode of the NPN triode Q1, the negative power input end of the sounder B and a pin 2 at the negative power input end of the short message module A1. The photoelectric switch A2 of the obstacle prompting mechanism is a PNP type reflection type photoelectric switch finished product and is connected with the signal sounder B1 through a conducting wire, a detection head of the photoelectric switch A2 is located outside an opening at the front end of the shell 2, a pin 3 of a positive power supply output end of the photoelectric switch A2 is connected with a positive power supply input end of the signal sounder B1, and a pin 2 of a negative power supply input end 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 the 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, the second NPN triode Q4 is connected with a collector of the third NPN triode Q5, and a source of the field effect transistor Q2 is connected with negative electrodes of the two capacitors C2 and C3 and an emitter of the third NPN 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 a lead (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 and one end of a power switch S1 are connected through a lead, 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 of a power output end NPN triode Q4 and Q5 of the power supply circuit, the positive pole power input end of a relay K1 and the emitter of the NPN triode Q1 of a power input end of a detection circuit, and 1 and 2 pins of a photoelectric switch a power input end photoelectric switch A2 of an obstacle prompting mechanism are respectively connected through leads, the positive pole of the storage battery G1 is connected with one end of the power switch SK through a lead, and the other end of the power switch SK is connected with the other end of the signal input end resistor R1 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, the user does not have a certain distance from the metal sheet M at the hand, the gate of the field-effect tube Q2 has no clutter signal, the field-effect tube Q2 is in a zero-bias state, the current between the source and the drain is large, the base voltage of the NPN triode Q3 is lower than 0.7V, the emitter is in a cut-off state and has no output, so that the capacitor C3 is not charged, the collectors of the NPN triode Q4 and Q5 have no output, and the rear-stage detection mechanism, the detection circuit and the obstacle prompt mechanism do not work. When a user uses the crutch body 1, the hand can contact the metal sheet M when the user holds the crutch body 1, so that clutter signals induced by a human body can enter a grid electrode of the field-effect tube Q2, the field-effect tube Q2 is no longer in a zero-bias state, the current between a drain and a source is reduced, the base voltage of the NPN triode Q3 is higher than 0.7V and is in a conducting state, an emitter outputs high level to enter a positive electrode (filter) of a capacitor C2 in a conducting state, the high level is reduced and limited to be charged into the capacitor C3 through a resistor R4, the current is reduced and limited to be charged into the capacitor C3, when the capacitor C3 is not fully charged within 25 seconds after the charging is started, the positive electrode of a 12V power supply is reduced and limited to enter a base voltage of a Darlington tube formed by the NPN triode Q4 and the Q5 through the resistors R4 and the R5, the Darlington tube is in a cut-off state, and a detection mechanism, a detection circuit and an obstacle prompt mechanism at the rear stage do not work. When the capacitor C3 is fully charged after 25 seconds, the voltage of the base electrode of a 12V power supply is reduced by the resistors R4 and R5, the current is limited, the voltage of the base electrode of a Darlington tube consisting of NPN triodes Q4 and Q5 is higher than 0.7V, the Darlington tube is in a conducting state, the low level output by the collector electrode enters the negative electrode power supply input end of the rear-stage detection mechanism, the detection circuit and the obstacle prompting mechanism, and then the rear-stage detection mechanism, the detection circuit and the obstacle prompting mechanism are electrified to work. In practical situations, when a 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 a crutch, and the hand 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 continuously keep the Darlington transistor on for about 20 seconds, so that the detection mechanism, the detection circuit and the obstacle prompting mechanism can continuously work for 20 seconds, after 20 seconds, the Darlington transistor can be cut off after the electricity charged on the capacitor C3 is completely released, and further the detection mechanism, the detection circuit and the obstacle prompting mechanism can not work any more when the electricity is lost. Through the above, when a user uses the walking stick body 1, after the walking stick is separated by 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 hand leaves the walking stick 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 time alarm of 20 seconds 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 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 detecting 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 detecting head and the ground is about 10 cm, when the crutch body 1 is lifted, the distance between the detecting 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 do not output, so that the buzzer B1 cannot sound, when the front end of the user has an obstacle at a certain distance, the detecting head of the photoelectric switch A2 outputs high level to the positive power input end of the buzzer B1 due to the obstacle shielding 3 feet, and the sounder B1 sends a loud voice prompt of 'having an obstacle 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.

As shown in fig. 1 and 2, after the detection mechanism and the detection circuit are powered on, when a user uses the walking stick body 1 and the lower end of the walking stick body 1 falling to the ground touches the floor 51 to contact with the ground, the movable rod 5 can overcome the elastic acting force of the spring 4 to move upwards, and the top plate props against the button of the power switch SK, so that the internal contact of the power switch SK is opened, the 12V power supply can not charge the capacitor C1, and the short message module A1 can not send short messages and the message sounder B can not sound. When a user uses the crutch body 1, each time the lower end of the crutch body 1, which is off the ground, contacts the floor 51 and does not contact the ground, the elastic acting force of the spring 4 can push the movable rod 5 to move downwards, and the top plate 54 does not support the button of the power switch SK any more because of moving downwards, so that the internal contact of the power switch SK is closed, and a 12V power supply can be subjected to voltage reduction and current limitation through the power switch SK with the closed contact to charge the capacitor C1 through the resistor R1; when the capacitor C1 is not fully charged within 6 seconds after the charging is started, the positive electrode of the 12V power supply is subjected to voltage reduction and current limiting through the resistors R1 and R2 and enters the base electrode of the NPN triode Q1 to be lower than 0.7V, the NPN triode Q1 is in a cut-off state, a low-level signal cannot be input into a pin 3 of the rear-stage short message module A1, the relay K1 cannot be electrified and attracted, and the buzzer B cannot be electrified and sounded. Under the actual condition, the time that the lower end of the crutch body 1 leaves the ground does not exceed 6 seconds, namely the lower end of the crutch body 1 can contact the ground within 6 seconds, and the internal contact of the power switch SK can be opened, so that the 12V power supply can not charge the capacitor C1 at the moment, the voltage charged on the capacitor C1 can be quickly released, the power switch SK can be closed only when the crutch body leaves the ground next time, and the 12V power supply can charge the capacitor C1. Through the above, on the premise that the walking stick body 1 is normally used, the 3 pins of the short message module A1 cannot input low-level signals, the relay K1 cannot be powered to attract, and the buzzer B cannot be powered to sound. 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 and enters the base of the NPN triode Q1 to be higher than 0.7v, the collector of the NPN triode Q1 is in a conducting state, outputs a low level and enters 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 sounder B is electrified to work to send a loud 'falling person' prompt sound to prompt a person to fall-down person to ask a person to rescue. 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, a mobile phone of family members of the old people connected with the short message module A1 at a far end can arrive at the scene in time or inform other nearby relatives or police and the like to rescue, so that unforeseen 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, a short message module A1 is a short message alarm module of a GSM 800 model, a 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, that "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 of a model E3K100-200, the working voltage is direct current 12V, the photoelectric switch is provided with three connecting wires, 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 detection head, the emission head of the detection head can emit infrared beams when the photoelectric switch works, when the farthest 200 cm range is reached, the infrared beams emitted by the detection head are blocked by objects and are received by receiving heads parallel to the detection head, the 3 pins of the signal output wire can output high level, when no object blocks, the 3 pins of the signal output wire can not output high level, an adjusting knob is arranged outside the rear end of a shell of the photoelectric switch, the adjusting knob adjusts the detecting distance of the detection head to the left and adjusts the detecting distance of the detection head to the right; the models of NPN triodes Q1, Q3, Q4 and Q5 are 9013, 9014, 9013 and 9013 respectively; the model number of the field effect tube Q2 is 3DJ6. The resistances of the resistors R1, R2, R3, R4 and R5 are 1.1M, 470K, 100K, 2.2M and 470K respectively. The types of the capacitors C1 and C2 are 4.7 mu F/25V and 10 mu F/25V respectively; the audible alarm B and B1 are active continuous audible alarm finished products (respectively sending out voice prompts that a person falls down and an obstacle exists in front).

While there have been shown and described what are at present considered to be the fundamental and essential features of the invention, together with the advantages thereof, it will be evident 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 of implementation 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 specification describes embodiments, these embodiments are not intended to encompass only a single embodiment, and such description is merely for clarity, and those skilled in the art will be able to refer to the specification as a whole, and the embodiments may be suitably combined to form other embodiments as will be appreciated 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 beeper, 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 a 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 walking stick body; the power supply output end of the power supply circuit is electrically connected with the power supply input ends of the detection circuit, the obstacle prompting mechanism and the detection mechanism, and one end of the power supply 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, 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 buzzer 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 and a capacitor 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 and a base of the first NPN transistor, an emitter of the first NPN transistor 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 transistor, an emitter of the second NPN transistor is connected with a base of the third NPN transistor, a collector of the second NPN transistor is connected with a collector of the third NPN transistor, and a source of the field effect transistor is connected with negative electrodes of the two capacitors and an emitter of the third NPN transistor.