CN214112514U

CN214112514U - Automatic emergency braking system of walking aid

Info

Publication number: CN214112514U
Application number: CN202023014108.6U
Authority: CN
Inventors: 姚艳波; 冯海燕
Original assignee: Mirun Medical Technology Suzhou Co ltd
Current assignee: Mirun Medical Technology Suzhou Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-09-03
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses an automatic emergency braking system of walking aid, including installing horizontal installation in the walking aid frame, installing and just being located near the arresting gear of gyro wheel in the walking aid frame, horizontal installation is equipped with sunk structure and is located the high slope of sunk structure both sides, is equipped with pressure sensor on the high slope, and pressure sensor is connected with microprocessor's input, and microprocessor's output and arresting gear are connected, and supporting spin has in the sunk structure. The walking aid is displaced along a slope, the horizontal device is inclined, the rolling ball is displaced to the high slope under the action of gravity, pressure is applied to the pressure sensor, the pressure sensor transmits a signal to the microprocessor, the microprocessor transmits a signal to the braking device, and the braking device acts to brake the roller so as to protect a rehabilitation trainer.

Description

Automatic emergency braking system of walking aid

Technical Field

The utility model relates to a rehabilitation training device, concretely relates to helps capable ware.

Background

The walking aid comprises a frame and rollers arranged at the bottom of the frame. The top of the frame is provided with a handle, and a rehabilitation trainer holds a pair of handles with both hands, walks with the assistance of the walking aid and carries out the rehabilitation training of legs and feet.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: the emergency braking system brakes the walker as the walker moves along the slope.

In order to solve the technical problem, the utility model provides a following technical scheme: the automatic emergency braking system of the walking aid comprises a horizontal device arranged on a frame of the walking aid and a braking device arranged on the frame of the walking aid and positioned near a roller, wherein the horizontal device is provided with a concave structure and a high slope positioned on two sides of the concave structure, a pressure sensor is arranged on the high slope and connected with the input end of a microprocessor, the output end of the microprocessor is connected with the braking device, and a rolling ball is matched in the concave structure.

The walking aid is displaced along a flat road, the horizontal device is in a horizontal state, the rolling ball is positioned in the concave structure and cannot be displaced to a high slope and contacted with the pressure sensor, the pressure sensor cannot transmit signals to the microprocessor, the microprocessor cannot transmit signals to the braking device, and the braking device does not act.

The walking aid is displaced along a slope, the horizontal device is inclined, the rolling ball is displaced to the high slope under the action of gravity, is in contact with the pressure sensor and exerts pressure on the pressure sensor, the pressure sensor transmits a signal to the microprocessor, the microprocessor transmits a signal to the braking device, and the braking device acts to brake the roller.

The utility model discloses the roll perception that utilizes the spin helps capable ware to be in on the slope, and the inclination on this kind of slope is big, is not suitable for the rehabilitation training person to carry out the rehabilitation training. Or the walking aid is separated from the rehabilitation trainer, and when the walking aid slides along a slope freely, the braking device emergently brakes the rollers.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of an automated emergency braking system for a walker;

FIG. 2 is a schematic diagram of a filter amplifier circuit;

FIG. 3 is a schematic view of a horizontal device;

FIG. 4 is a schematic view of the horizontal device when the walker is tilted;

fig. 5 is a schematic view of the braking device.

The symbols in the drawings illustrate that:

10. a leveling device; 11. a recessed structure; 12. high slope; 13. a pressure sensor; 14. rolling a ball; 15. a box body;

20. a roller; 21. a speed sensor;

30. a braking device; 31. a stopper; 32. an electromagnet; 33. a rotating shaft; 34. a return spring;

40. a microprocessor;

50. a filter amplifier circuit;

60. a walker frame; 61. a roller shaft.

Detailed Description

Referring to fig. 3 and 5, the automatic emergency braking system for the walking aid comprises a horizontal device 10 installed on a frame of the walking aid and a braking device 30 installed on the frame of the walking aid and located near a roller 20, wherein the horizontal device is provided with a concave structure 11 and high slopes 12 located on two sides of the concave structure, a pressure sensor 13 is arranged on the high slopes, the pressure sensor is connected with an input end of a microprocessor 40, an output end of the microprocessor is connected with the braking device, and a rolling ball 14 is matched in the concave structure.

The utility model relates to a walking aid suitable for the inconvenient and not suitable rehabilitation training person who trains on the great slope of leg and foot.

The aid is displaced along a flat road with the level device 10 in a level position and the ball 20 in the concave structure 11 without contact with the pressure sensor 13. The walker is displaced along a slope, for example, the slope of the slope is greater than 30 degrees, the rolling ball is separated from the concave structure 11 under the action of gravity and is displaced to a high slope 12, pressure is applied to the pressure sensor 13, the pressure sensor sends a signal to the microprocessor 40, the microprocessor sends a signal to the braking device 30, and the braking device acts to brake the roller.

As shown in fig. 1, the pressure sensor 13 is connected to the input terminal of the microprocessor 40 after passing through the delay circuit. In practice, where a flat road surface may have pits or bumps, and the walker encounters such pits or bumps, the ball 20 may roll out of the indentation 11 and contact the pressure sensor 13, which would not be reasonable if the brake 30 were activated. Therefore, the utility model discloses add delay circuit, the signal that produces after pressure sensor pressurized sends to microprocessor again after delay circuit time delay (for example 1-3 seconds), so, if what the walking aid met is pit or the uneven department on the flat road surface, microprocessor can not receive the signal that comes from pressure sensor to avoid arresting gear's spurious triggering.

The delay circuit comprises resistors R5, R6, C4 and a MOS transistor, when a signal from the pressure sensor 13 passes through the delay circuit, the voltage across the capacitor cannot suddenly change due to the fact that the C4 is charged through the R5, the voltage across the R5 is high level, the threshold voltage of the MOS transistor is not reached at the moment, and therefore the MOS transistor is in a closed state. When the charging of the C4 is finished gradually, the voltage at the two ends of the R5 is gradually reduced to 0, the threshold voltage is met, the MOS tube is started at the moment, and the signal is transmitted to the input end of the microprocessor.

Referring to fig. 3 and 4, the recessed structure 11 and the high slope 12 are located in a box body 15 of the horizontal device, and the pressure sensor 13 is installed on a side wall of the box body.

As a modification, as shown in figure 1, the frame of the walking aid is provided with a speed sensor 21, the speed sensor is positioned near the roller 20, the speed sensor is connected with an electronic switch, and the electronic switch VT1 is connected with a time delay circuit in parallel. The speed sensor is used for monitoring the speed of the roller. When the speed of the roller monitored by the speed sensor reaches a certain value, the speed sensor sends a signal to the base electrode of the electronic switch, so that the electronic switch is turned on, the electronic switch short-circuits the delay circuit, and if the pressure sensor 13 has a signal at the moment, the signal is directly transmitted to the microprocessor through the electronic switch. This is the case for a walker who is free from rehabilitation training and slides freely along a slope, and if time is delayed, a large accident may be caused, so the speed sensor short-circuits the delay circuit, so that the signal of the pressure sensor can be immediately transmitted to the microprocessor, and the microprocessor can immediately actuate the braking device.

As shown in fig. 1, the pressure sensor 13 and the speed sensor 21 are both connected to a filter amplifier circuit 50, as shown in fig. 2, the filter amplifier circuit includes a first operational amplifier AR1, a non-inverting input terminal of the first operational amplifier AR1 is connected to one end of a resistor R2, one end of a capacitor C2, one end of a resistor C3 through a resistor R3, the other end of the resistor R2 is grounded, the other end of the capacitor C2 is connected to one end of a capacitor C1 and a positive output terminal of the pressure sensor through a resistor R1, a negative output terminal of the pressure sensor is grounded to the other end of the capacitor C1, an inverting input terminal of the first operational amplifier AR1 is grounded through a resistor R4, and an output terminal of the first operational amplifier AR1 is connected to the other end of the capacitor C3 and a cathode of the zener diode VD. The filtering and amplifying circuit can effectively filter outside clutter interference and improve the accuracy of a detection result.

As shown in FIG. 5, the braking device 30 includes a braking member 31 capable of frictionally contacting the roller 20, an electromagnet 32 located near the braking member, the braking member being mounted on a rotating shaft 33 mounted on the frame of the walker. Principle of microprocessor-driven brake: the microprocessor sends high level to the electronic switch VT2, VT2 is conducted, the coil of the electromagnet 32 is electrified, the electromagnet adsorbs one end of the braking piece 31, and the other end is contacted with the roller 20 to brake the roller.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. Automatic emergency braking system of a walking aid, comprising a horizontal device (10) arranged on a frame of the walking aid, a braking device (30) arranged on the frame of the walking aid and positioned near a roller (20), and is characterized in that: the horizontal device is provided with a sunken structure (11) and high slopes (12) positioned on two sides of the sunken structure, a pressure sensor (13) is arranged on the high slopes, the pressure sensor is connected with the input end of a microprocessor (40), the output end of the microprocessor is connected with a braking device, and a rolling ball (14) is matched in the sunken structure.

2. A walker automatic emergency braking system as claimed in claim 1 wherein: the pressure sensor (13) is connected with the input end of the microprocessor (40) after passing through the time delay circuit.

3. A walker automatic emergency braking system as claimed in claim 1 wherein: the recessed structure (11) and the high slope (12) are located in a box body (15) of the horizontal device.

4. A walker automatic emergency braking system as claimed in claim 2 wherein: a speed sensor (21) is installed on the frame of the walking aid and is positioned near the roller (20), the speed sensor is connected with an electronic switch, and the electronic switch is connected with a delay circuit in parallel.

5. A walker automatic emergency braking system as claimed in claim 1 wherein: the braking device (30) comprises a braking part (31) capable of being in frictional contact with the roller (20), and an electromagnet (32) positioned near the braking part, wherein the braking part is arranged on a rotating shaft (33), and the rotating shaft is arranged on the frame of the walking aid.