Blind guiding walking stick

Abstract

The utility model relates to a blind guiding walking stick which comprises a telescopic rod, a baffle, a grip, an ultrasonic ranging module, a photoresistor sensor, a vibration module, an LED flashing module, a single chip microcomputer, a motor telescopic rod, a main switch and the like. The utility model relates to a blind guiding walking stick which is characterized in that a main body is a walking stick, and a singlechip is positioned inside the walking stick; the ultrasonic ranging module is located on the suspension device; the blind guiding walking stick battery jar is positioned behind the motor telescopic rod; the vibration module is located in a grip of the walking stick, and the photoresistor sensor is located over a walking stick baffle. The LED flash module is located in the center of the motor telescopic rod. The motor telescopic rod at the lower part of the walking stick can be controlled to stretch and pop up through a key; all the parts are connected with one another through internal circuits. According to the utility model, danger reminding and obstacle avoidance can be carried out on a user and nearby people through illumination and distance changes, and the blind person night travel safety and convenience can be improved by being portable, telescopic and convenient to carry.

Description

Technical Field

[0001] This utility model relates to the field of cane technology, and in particular to a guide cane for the visually impaired. Background Technology

[0002] Guide canes are an indispensable item for blind people, acting as their eyes to guide them. However, with societal development, ordinary guide canes still fall short of meeting the needs of blind people due to numerous limitations. Nevertheless, smart guide canes are gradually becoming a part of the lives of blind individuals.

[0003] With the development of society, people's nightlife is becoming increasingly exciting. For blind people, it is sometimes unavoidable to go out at night. However, going out at night carries great risks. It may not only endanger the personal safety of blind people, but also seriously endanger public safety, disrupt public order, and have a certain negative impact on society.

[0004] For example, Chinese patent document CN205459715U discloses a guide cane including a post, a foot pad at the bottom of the post, and a handle at the top of the post. The post has a programmable controller inside, and an ultrasonic ranging module electrically connected to the programmable controller is located on the outer wall of the post near the bottom. The post also has a voice chip, a noise sensor, and a battery electrically connected to the programmable controller inside. The handle is integrally formed with the post. An LED flashlight 10 electrically connected to the programmable controller is located in the middle of the left end face of the handle. A switch is located on the outer wall of the handle. An earphone hole is located on the bottom face of the right end of the handle extending downward to the right.

[0005] Chinese patent document with prior art publication number CN208677873U discloses a guide cane including a cane body, a handle on the cane body, a processor and a power supply and voice module respectively connected to the processor inside the cane body, a first ultrasonic detection module connected to the processor at the end of the cane body near the ground, and a second ultrasonic detection module, a vibration module and an alarm module respectively connected to the processor on the handle.

[0006] Chinese patent document CN206792632U discloses a guide cane comprising a handle and a cane body. The cane body is equipped with an LED flashlight 10, an alarm, an ultrasonic rangefinder, a GPS voice navigation module, a GSM communication module, a Bluetooth module, and a control module. The ultrasonic rangefinder, GPS voice navigation module, GSM communication module, and Bluetooth module are connected to the control module. However, existing guide canes do not yet have the functions of automatically sensing the LED flashing through a photoresistor sensor or improving the portability of the cane through an electric telescopic rod.

[0007] However, the solutions in the above patents all have certain limitations and cannot meet the needs of blind people in various usage scenarios. Utility Model Content

[0008] Therefore, the technical problem to be solved by this utility model is to overcome the problem that blind people need to travel at night but face greater risks, and that canes are inconvenient to carry in public places.

[0009] To solve the above-mentioned technical problems, this utility model provides a guide cane, comprising a telescopic rod, a baffle, and a handle. The handle is disposed at the upper end of the telescopic rod, and the baffle and handle are fixedly connected to each other on their side walls, with the baffle located in front of the handle in the gripping direction. The lower end of the baffle is equipped with an ultrasonic ranging device. A microcontroller is housed inside the telescopic rod, and a vibration module is housed inside the handle. The ultrasonic ranging device is connected to the input port of the microcontroller and is used to emit ultrasonic waves to measure the distance between the baffle and obstacles. The vibration module is connected to the output port of the microcontroller, and the microcontroller drives the vibration module through the signal from the ultrasonic ranging device. The vibration module vibrates to alert the user to obstacles ahead.

[0010] In one embodiment of this utility model, the upper end of the telescopic rod is provided with a battery slot for a guide cane, and a lithium battery is provided in the battery slot for a guide cane. The lithium battery is used to power the circuit part of the guide cane.

[0011] In one embodiment of the present invention, the telescopic rod is provided with a first telescopic part, a second telescopic part and a third telescopic part, which are nested together in a sequence from the outside to the inside.

[0012] In one embodiment of this utility model, a photoresistor sensor is provided in front of the baffle. The photoresistor sensor is connected to the signal input terminal of the microcontroller and is used to sense the ambient light intensity.

[0013] In one embodiment of this utility model, an LED flash is provided on the side wall opposite to the baffle of the telescopic rod. The LED flash is connected to the signal output terminal of the microcontroller. The microcontroller drives the LED flash through the signal of the photoresistor sensor. The LED flash is used to emit a flash signal to warn the crowd to avoid it.

[0014] In one embodiment of this utility model, the baffle is U-shaped, and the two ends of the baffle are fixedly connected to the outer wall of the telescopic rod.

[0015] In one embodiment of the present invention, an ultrasonic suspension part is connected to the lower end of the baffle, the ultrasonic suspension part is located on the side of the baffle away from the telescopic rod, and the ultrasonic ranging device is disposed on the ultrasonic suspension part.

[0016] In one embodiment of this utility model, the ultrasonic ranging device includes an ultrasonic ranging transmitting probe and an ultrasonic ranging receiving probe. Both the ultrasonic ranging transmitting probe and the ultrasonic ranging receiving probe are disposed in front of the ultrasonic suspension part. The ultrasonic ranging transmitting probe is used to transmit ultrasonic waves, and the ultrasonic ranging receiving probe is used to receive ultrasonic waves.

[0017] In one embodiment of this utility model, the telescopic rod is provided with a master switch, which is a push-button switch, and the master switch is used to power on or power off the lithium battery in the battery compartment of the guide cane.

[0018] In one embodiment of this utility model, the telescopic rod is provided with a button, which is used to control the microcontroller to receive external signals.

[0019] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0020] The guide cane described in this invention prioritizes portability and practicality. Compared to existing range-measuring and alarm-equipped guide canes, which are inconvenient to carry in public places and pose a significant danger at night or in poor lighting conditions, this invention allows for the extension and retraction of the guide cane via a switch, making it convenient to retract when entering public places such as small supermarkets. Furthermore, at night, a photoresistor sensor detects changes in light intensity and automatically activates an LED flash to warn others to avoid the area, thereby improving the safety of the blind person. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1This is a schematic diagram of the structure of the guide cane in a preferred embodiment of the present invention;

[0023] Figure 2 This is a circuit diagram of the guide cane in a preferred embodiment of the present invention.

[0024] Explanation of reference numerals on the accompanying drawings:

[0025] 1. Battery compartment for guide canes;

[0026] 2. Motor telescopic rod; 21. First telescopic section; 22. Second telescopic section; 23. Third telescopic section; 24. Motor driver chip; 25. Six-wire stepper motor; 26. Button;

[0027] 3. Baffle;

[0028] 4. Handle;

[0029] 5. Vibration module; 51. Motor driver chip; 52. Vibration motor;

[0030] 6. Push-button switch;

[0031] 7. Microcontroller;

[0032] 8. Ultrasonic ranging module; 8.1 Ultrasonic ranging transmitting probe; 8.2 Ultrasonic ranging receiving probe;

[0033] 9. Ultrasonic suspension unit;

[0034] 10. LED flash;

[0035] 11. Photoresistor sensor module; 111. Photoresistor; 112. ADC0808 analog-to-digital converter. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0037] Reference Figure 1 As shown, the guide cane of this utility model includes: a telescopic rod 2, a baffle 3, and a handle 4. The telescopic rod 2 is the main body of the guide cane. A battery slot 1 is provided on the telescopic rod 2, containing a lithium battery. The battery slot 1 is embedded in the motor telescopic rod 2, and the lithium battery powers the circuit. The handle 4 is located above the telescopic rod 2 and is perpendicularly connected to the baffle 3. The handle 4 is made of the same material as the telescopic rod 2 and is covered with lightweight silicone foam. The baffle 3 is located in front of the handle 4, and is square with rounded corners.

[0038] The aforementioned telescopic rod 2 mainly consists of three sections: a first telescopic section 21, a second telescopic section 22, and a third telescopic section 23. The first telescopic section 21, the second telescopic section 22, and the third telescopic section 23 are nested sequentially. In the pop-out state, the telescopic rod 2 extends the first telescopic section 21, the second telescopic section 22, and the third telescopic section 23. In the retracted state, the telescopic rod 2 retracts them into its interior. The internal circuit structure is formed by connecting a motor drive chip 24, a six-wire stepper motor 25, and a button 26 as shown in the figure.

[0039] The guide cane also includes a vibration module 5, a main switch 6, a microcontroller 7, an ultrasonic ranging device 8, an ultrasonic suspension part 9, an LED flash 10, and a photoresistor sensor 11. The vibration module 5 is located inside the handle 4 and contains a motor drive chip 51 and a vibration motor 52; the vibration module 5 is connected to the microcontroller 7. The main switch 6 is located at the front of the handle 4 and is a push-button switch. Both ends of the main switch 6 are connected to the guide cane battery compartment 1 and the microcontroller 7, respectively. The microcontroller 7 is located inside the telescopic rod 2 and is an AT89C52 microcontroller, which is electrically connected to the main switch 6, vibration module 5, ultrasonic ranging device 8, photoresistor sensor 11, and LED flash 10. A baffle 3 provides a base for the photoresistor sensor module 11 and the LED flash 10. The ultrasonic ranging module 8 is located below the ultrasonic suspension part 9 and is electrically connected to the microcontroller 7. The ultrasonic ranging module 8 mainly measures distance by the time difference between transmitting and receiving ultrasonic waves.

[0040] The ultrasonic suspension part 9 is located in front of the baffle 3 and is made of the same material as the baffle 3. The lower end of the ultrasonic suspension part 9 is vertically fixed to the ultrasonic ranging module 8. The ultrasonic suspension part 9 is mechanically connected to the shell of the baffle 3 and has a certain amount of movable space. The ultrasonic ranging module 8 can always maintain horizontal ranging through this device to ensure accurate distance measurement.

[0041] The photoresistor sensor 11 is embedded in front of the baffle 3 and is electrically connected to the microcontroller 7; it can convert the light signal from the external environment into an electrical signal and transmit it to the microcontroller 7.

[0042] The LED flashlight 10 is located in front of the telescopic pole 2 and is electrically connected to the microcontroller 7. It mainly receives electrical signals from the microcontroller 7 to light up and warn people around to avoid the area.

[0043] When in use, the blind person connects the cane battery slot 1 to the microcontroller 7 via the main switch 6, providing power to the entire circuit and starting the circuit system to work; at this time, when the button 26 is pressed, the microcontroller 7 receives a signal from the external interrupt 1, executes the pop-up code to drive the motor driver chip 24, thereby driving the six-wire stepper motor 25. The six-wire stepper motor 25 rotates the set number of turns to rotate the lower part of the cane out.

[0044] When the main switch 6 is turned on, the microcontroller 7 drives the transmitting probe of the ultrasonic ranging device 8 to emit ultrasonic waves through the P3.1 / TXD port. Simultaneously, the microcontroller's internal counter starts counting and monitors the value at the P3.0 / RXD port. When the receiving probe of the ultrasonic ranging device 8 receives the ultrasonic wave, the value at the P3.0 / RXD port changes, at which point the counting stops, and time T is obtained. The corresponding distance is calculated. When there is an obstacle in front and the distance is less than 1 meter, the microcontroller 7 drives the motor driver chip 51 located inside the grip 4 through the lower four bits of P2 to make the vibration motor 52 start to vibrate, thereby reminding the user that there is an obstacle 1 meter in front.

[0045] During operation, the resistance of photoresistor 111 changes with varying light intensity, causing the ADC0808 analog-to-digital converter 112 to collect different analog voltages and convert them into digital signals, which are then input to port P0 of microcontroller 7. When microcontroller 7 receives the digital voltage signal from port P0, it checks whether it reaches a set threshold voltage and changes the state of LED flash 10 by assigning a value to port P1.0. In nighttime or poor lighting conditions, microcontroller 7 periodically inverts the value of P1.0 at time intervals set by its internal timer, thus causing LED flash 10 to flash periodically. When lighting conditions are good, microcontroller 7 assigns a value of 1 to P1.0, turning off LED flash 10.

[0046] When entering public places such as small supermarkets, blind people can temporarily detach their canes under the guidance of store staff. They can press button 26, and the microcontroller 7 receives an interrupt signal from external interrupt source P3.3. It then executes the retraction code to drive the motor driver chip 24, which in turn drives the six-wire stepper motor 25 in reverse. The six-wire stepper motor 25 rotates in reverse for the set number of turns, retracting the lower part of the cane and making the cane portable.

[0047] This utility model of a guide cane measures the distance in front using an ultrasonic ranging device and warns the user through a vibration device. At the same time, when used at night, it detects changes in light intensity through a photoresistor sensor and reacts with an LED flash, allowing people around to perceive the presence of the blind person and take the initiative to avoid them, thereby reducing the possibility of danger when traveling at night. In addition, when the guide cane is not needed, it can be compressed through a telescopic device, which greatly increases its convenience.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A guide cane, characterized in that, include: The telescopic rod, the baffle, and the handle are provided at the upper end of the telescopic rod. The baffle and the handle are fixedly connected to the side walls, and the baffle is located in front of the handle in the gripping direction. The lower end of the baffle is equipped with an ultrasonic ranging device, the telescopic rod contains a microcontroller, and the handle contains a vibration module. The ultrasonic ranging device is connected to the input port of the microcontroller and is used to emit ultrasonic waves to measure the distance between the baffle and the obstacle. The vibration module is connected to the output port of the microcontroller, and the microcontroller drives the vibration module through the signal from the ultrasonic ranging device. The vibration module is used to vibrate to alert the user that there is an obstacle ahead. A photoresistor sensor is provided in front of the baffle. The photoresistor sensor is connected to the signal input terminal of the microcontroller and is used to sense the ambient light intensity. An LED flash is provided on the side wall of the telescopic rod opposite to the baffle. The LED flash is connected to the signal output terminal of the microcontroller. The microcontroller drives the LED flash through the signal from the photoresistor sensor. The LED flash is used to emit a flash signal to warn people to avoid the area.

2. The guide cane according to claim 1, characterized in that: The upper end of the telescopic rod is provided with a battery slot for the guide cane, and a lithium battery is provided in the battery slot for the guide cane. The lithium battery is used to power the circuit part of the guide cane.

3. The guide cane according to claim 1, characterized in that: The telescopic rod has a first telescopic part, a second telescopic part, and a third telescopic part inside, which are nested together in a sequence from the outside to the inside.

4. The guide cane according to claim 1, characterized in that: The baffle is U-shaped, and both ends of the baffle are fixedly connected to the outer wall of the telescopic rod.

5. The guide cane according to claim 4, characterized in that: The lower end of the baffle is connected to an ultrasonic suspension part, which is located on the side of the baffle away from the telescopic rod, and the ultrasonic ranging device is mounted on the ultrasonic suspension part.

6. The guide cane according to claim 5, characterized in that: The ultrasonic ranging device includes an ultrasonic ranging transmitting probe and an ultrasonic ranging receiving probe, both of which are positioned in front of the ultrasonic suspension part. The ultrasonic ranging transmitting probe is used to transmit ultrasonic waves, and the ultrasonic ranging receiving probe is used to receive ultrasonic waves.

7. The guide cane according to claim 2, characterized in that: The telescopic rod is equipped with a master switch, which is a push-button switch, and is used to power on or off the lithium battery in the battery compartment of the guide cane.

8. The guide cane according to claim 7, characterized in that: The telescopic rod is equipped with a button, which is used to control the microcontroller to receive external signals.

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